diff options
Diffstat (limited to 'gdb/dwarf2read.c')
| -rw-r--r-- | gdb/dwarf2read.c | 6938 |
1 files changed, 6938 insertions, 0 deletions
diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c new file mode 100644 index 0000000..4ef683c --- /dev/null +++ b/gdb/dwarf2read.c @@ -0,0 +1,6938 @@ +/* DWARF 2 debugging format support for GDB. + Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 + Free Software Foundation, Inc. + + Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology, + Inc. with support from Florida State University (under contract + with the Ada Joint Program Office), and Silicon Graphics, Inc. + Initial contribution by Brent Benson, Harris Computer Systems, Inc., + based on Fred Fish's (Cygnus Support) implementation of DWARF 1 + support in dwarfread.c + + This file is part of GDB. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or (at + your option) any later version. + + This program is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include "defs.h" +#include "bfd.h" +#include "symtab.h" +#include "gdbtypes.h" +#include "symfile.h" +#include "objfiles.h" +#include "elf/dwarf2.h" +#include "buildsym.h" +#include "demangle.h" +#include "expression.h" +#include "filenames.h" /* for DOSish file names */ +#include "macrotab.h" + +#include "language.h" +#include "complaints.h" +#include "bcache.h" +#include <fcntl.h> +#include "gdb_string.h" +#include "gdb_assert.h" +#include <sys/types.h> + +#ifndef DWARF2_REG_TO_REGNUM +#define DWARF2_REG_TO_REGNUM(REG) (REG) +#endif + +#if 0 +/* .debug_info header for a compilation unit + Because of alignment constraints, this structure has padding and cannot + be mapped directly onto the beginning of the .debug_info section. */ +typedef struct comp_unit_header + { + unsigned int length; /* length of the .debug_info + contribution */ + unsigned short version; /* version number -- 2 for DWARF + version 2 */ + unsigned int abbrev_offset; /* offset into .debug_abbrev section */ + unsigned char addr_size; /* byte size of an address -- 4 */ + } +_COMP_UNIT_HEADER; +#define _ACTUAL_COMP_UNIT_HEADER_SIZE 11 +#endif + +/* .debug_pubnames header + Because of alignment constraints, this structure has padding and cannot + be mapped directly onto the beginning of the .debug_info section. */ +typedef struct pubnames_header + { + unsigned int length; /* length of the .debug_pubnames + contribution */ + unsigned char version; /* version number -- 2 for DWARF + version 2 */ + unsigned int info_offset; /* offset into .debug_info section */ + unsigned int info_size; /* byte size of .debug_info section + portion */ + } +_PUBNAMES_HEADER; +#define _ACTUAL_PUBNAMES_HEADER_SIZE 13 + +/* .debug_pubnames header + Because of alignment constraints, this structure has padding and cannot + be mapped directly onto the beginning of the .debug_info section. */ +typedef struct aranges_header + { + unsigned int length; /* byte len of the .debug_aranges + contribution */ + unsigned short version; /* version number -- 2 for DWARF + version 2 */ + unsigned int info_offset; /* offset into .debug_info section */ + unsigned char addr_size; /* byte size of an address */ + unsigned char seg_size; /* byte size of segment descriptor */ + } +_ARANGES_HEADER; +#define _ACTUAL_ARANGES_HEADER_SIZE 12 + +/* .debug_line statement program prologue + Because of alignment constraints, this structure has padding and cannot + be mapped directly onto the beginning of the .debug_info section. */ +typedef struct statement_prologue + { + unsigned int total_length; /* byte length of the statement + information */ + unsigned short version; /* version number -- 2 for DWARF + version 2 */ + unsigned int prologue_length; /* # bytes between prologue & + stmt program */ + unsigned char minimum_instruction_length; /* byte size of + smallest instr */ + unsigned char default_is_stmt; /* initial value of is_stmt + register */ + char line_base; + unsigned char line_range; + unsigned char opcode_base; /* number assigned to first special + opcode */ + unsigned char *standard_opcode_lengths; + } +_STATEMENT_PROLOGUE; + +/* offsets and sizes of debugging sections */ + +static file_ptr dwarf_info_offset; +static file_ptr dwarf_abbrev_offset; +static file_ptr dwarf_line_offset; +static file_ptr dwarf_pubnames_offset; +static file_ptr dwarf_aranges_offset; +static file_ptr dwarf_loc_offset; +static file_ptr dwarf_macinfo_offset; +static file_ptr dwarf_str_offset; +file_ptr dwarf_frame_offset; +file_ptr dwarf_eh_frame_offset; + +static unsigned int dwarf_info_size; +static unsigned int dwarf_abbrev_size; +static unsigned int dwarf_line_size; +static unsigned int dwarf_pubnames_size; +static unsigned int dwarf_aranges_size; +static unsigned int dwarf_loc_size; +static unsigned int dwarf_macinfo_size; +static unsigned int dwarf_str_size; +unsigned int dwarf_frame_size; +unsigned int dwarf_eh_frame_size; + +/* names of the debugging sections */ + +#define INFO_SECTION ".debug_info" +#define ABBREV_SECTION ".debug_abbrev" +#define LINE_SECTION ".debug_line" +#define PUBNAMES_SECTION ".debug_pubnames" +#define ARANGES_SECTION ".debug_aranges" +#define LOC_SECTION ".debug_loc" +#define MACINFO_SECTION ".debug_macinfo" +#define STR_SECTION ".debug_str" +#define FRAME_SECTION ".debug_frame" +#define EH_FRAME_SECTION ".eh_frame" + +/* local data types */ + +/* The data in a compilation unit header, after target2host + translation, looks like this. */ +struct comp_unit_head + { + unsigned long length; + short version; + unsigned int abbrev_offset; + unsigned char addr_size; + unsigned char signed_addr_p; + unsigned int offset_size; /* size of file offsets; either 4 or 8 */ + unsigned int initial_length_size; /* size of the length field; either + 4 or 12 */ + }; + +/* The line number information for a compilation unit (found in the + .debug_line section) begins with a "statement program header", + which contains the following information. */ +struct line_header +{ + unsigned int total_length; + unsigned short version; + unsigned int header_length; + unsigned char minimum_instruction_length; + unsigned char default_is_stmt; + int line_base; + unsigned char line_range; + unsigned char opcode_base; + + /* standard_opcode_lengths[i] is the number of operands for the + standard opcode whose value is i. This means that + standard_opcode_lengths[0] is unused, and the last meaningful + element is standard_opcode_lengths[opcode_base - 1]. */ + unsigned char *standard_opcode_lengths; + + /* The include_directories table. NOTE! These strings are not + allocated with xmalloc; instead, they are pointers into + debug_line_buffer. If you try to free them, `free' will get + indigestion. */ + unsigned int num_include_dirs, include_dirs_size; + char **include_dirs; + + /* The file_names table. NOTE! These strings are not allocated + with xmalloc; instead, they are pointers into debug_line_buffer. + Don't try to free them directly. */ + unsigned int num_file_names, file_names_size; + struct file_entry + { + char *name; + unsigned int dir_index; + unsigned int mod_time; + unsigned int length; + } *file_names; + + /* The start and end of the statement program following this + header. These point into dwarf_line_buffer. */ + char *statement_program_start, *statement_program_end; +}; + +/* When we construct a partial symbol table entry we only + need this much information. */ +struct partial_die_info + { + enum dwarf_tag tag; + unsigned char has_children; + unsigned char is_external; + unsigned char is_declaration; + unsigned char has_type; + unsigned int offset; + unsigned int abbrev; + char *name; + int has_pc_info; + CORE_ADDR lowpc; + CORE_ADDR highpc; + struct dwarf_block *locdesc; + unsigned int language; + char *sibling; + }; + +/* This data structure holds the information of an abbrev. */ +struct abbrev_info + { + unsigned int number; /* number identifying abbrev */ + enum dwarf_tag tag; /* dwarf tag */ + int has_children; /* boolean */ + unsigned int num_attrs; /* number of attributes */ + struct attr_abbrev *attrs; /* an array of attribute descriptions */ + struct abbrev_info *next; /* next in chain */ + }; + +struct attr_abbrev + { + enum dwarf_attribute name; + enum dwarf_form form; + }; + +/* This data structure holds a complete die structure. */ +struct die_info + { + enum dwarf_tag tag; /* Tag indicating type of die */ + unsigned short has_children; /* Does the die have children */ + unsigned int abbrev; /* Abbrev number */ + unsigned int offset; /* Offset in .debug_info section */ + unsigned int num_attrs; /* Number of attributes */ + struct attribute *attrs; /* An array of attributes */ + struct die_info *next_ref; /* Next die in ref hash table */ + struct die_info *next; /* Next die in linked list */ + struct type *type; /* Cached type information */ + }; + +/* Attributes have a name and a value */ +struct attribute + { + enum dwarf_attribute name; + enum dwarf_form form; + union + { + char *str; + struct dwarf_block *blk; + unsigned long unsnd; + long int snd; + CORE_ADDR addr; + } + u; + }; + +struct function_range +{ + const char *name; + CORE_ADDR lowpc, highpc; + int seen_line; + struct function_range *next; +}; + +static struct function_range *cu_first_fn, *cu_last_fn, *cu_cached_fn; + +/* Get at parts of an attribute structure */ + +#define DW_STRING(attr) ((attr)->u.str) +#define DW_UNSND(attr) ((attr)->u.unsnd) +#define DW_BLOCK(attr) ((attr)->u.blk) +#define DW_SND(attr) ((attr)->u.snd) +#define DW_ADDR(attr) ((attr)->u.addr) + +/* Blocks are a bunch of untyped bytes. */ +struct dwarf_block + { + unsigned int size; + char *data; + }; + +/* We only hold one compilation unit's abbrevs in + memory at any one time. */ +#ifndef ABBREV_HASH_SIZE +#define ABBREV_HASH_SIZE 121 +#endif +#ifndef ATTR_ALLOC_CHUNK +#define ATTR_ALLOC_CHUNK 4 +#endif + +static struct abbrev_info *dwarf2_abbrevs[ABBREV_HASH_SIZE]; + +/* A hash table of die offsets for following references. */ +#ifndef REF_HASH_SIZE +#define REF_HASH_SIZE 1021 +#endif + +static struct die_info *die_ref_table[REF_HASH_SIZE]; + +/* Obstack for allocating temporary storage used during symbol reading. */ +static struct obstack dwarf2_tmp_obstack; + +/* Offset to the first byte of the current compilation unit header, + for resolving relative reference dies. */ +static unsigned int cu_header_offset; + +/* Allocate fields for structs, unions and enums in this size. */ +#ifndef DW_FIELD_ALLOC_CHUNK +#define DW_FIELD_ALLOC_CHUNK 4 +#endif + +/* The language we are debugging. */ +static enum language cu_language; +static const struct language_defn *cu_language_defn; + +/* Actually data from the sections. */ +static char *dwarf_info_buffer; +static char *dwarf_abbrev_buffer; +static char *dwarf_line_buffer; +static char *dwarf_str_buffer; +static char *dwarf_macinfo_buffer; + +/* A zeroed version of a partial die for initialization purposes. */ +static struct partial_die_info zeroed_partial_die; + +/* The generic symbol table building routines have separate lists for + file scope symbols and all all other scopes (local scopes). So + we need to select the right one to pass to add_symbol_to_list(). + We do it by keeping a pointer to the correct list in list_in_scope. + + FIXME: The original dwarf code just treated the file scope as the first + local scope, and all other local scopes as nested local scopes, and worked + fine. Check to see if we really need to distinguish these + in buildsym.c. */ +static struct pending **list_in_scope = &file_symbols; + +/* FIXME: decode_locdesc sets these variables to describe the location + to the caller. These ought to be a structure or something. If + none of the flags are set, the object lives at the address returned + by decode_locdesc. */ + +static int optimized_out; /* No ops in location in expression, + so object was optimized out. */ +static int isreg; /* Object lives in register. + decode_locdesc's return value is + the register number. */ +static int offreg; /* Object's address is the sum of the + register specified by basereg, plus + the offset returned. */ +static int basereg; /* See `offreg'. */ +static int isderef; /* Value described by flags above is + the address of a pointer to the object. */ +static int islocal; /* Variable is at the returned offset + from the frame start, but there's + no identified frame pointer for + this function, so we can't say + which register it's relative to; + use LOC_LOCAL. */ + +/* DW_AT_frame_base values for the current function. + frame_base_reg is -1 if DW_AT_frame_base is missing, otherwise it + contains the register number for the frame register. + frame_base_offset is the offset from the frame register to the + virtual stack frame. */ +static int frame_base_reg; +static CORE_ADDR frame_base_offset; + +/* This value is added to each symbol value. FIXME: Generalize to + the section_offsets structure used by dbxread (once this is done, + pass the appropriate section number to end_symtab). */ +static CORE_ADDR baseaddr; /* Add to each symbol value */ + +/* We put a pointer to this structure in the read_symtab_private field + of the psymtab. + The complete dwarf information for an objfile is kept in the + psymbol_obstack, so that absolute die references can be handled. + Most of the information in this structure is related to an entire + object file and could be passed via the sym_private field of the objfile. + It is however conceivable that dwarf2 might not be the only type + of symbols read from an object file. */ + +struct dwarf2_pinfo + { + /* Pointer to start of dwarf info buffer for the objfile. */ + + char *dwarf_info_buffer; + + /* Offset in dwarf_info_buffer for this compilation unit. */ + + unsigned long dwarf_info_offset; + + /* Pointer to start of dwarf abbreviation buffer for the objfile. */ + + char *dwarf_abbrev_buffer; + + /* Size of dwarf abbreviation section for the objfile. */ + + unsigned int dwarf_abbrev_size; + + /* Pointer to start of dwarf line buffer for the objfile. */ + + char *dwarf_line_buffer; + + /* Size of dwarf_line_buffer, in bytes. */ + + unsigned int dwarf_line_size; + + /* Pointer to start of dwarf string buffer for the objfile. */ + + char *dwarf_str_buffer; + + /* Size of dwarf string section for the objfile. */ + + unsigned int dwarf_str_size; + + /* Pointer to start of dwarf macro buffer for the objfile. */ + + char *dwarf_macinfo_buffer; + + /* Size of dwarf macinfo section for the objfile. */ + + unsigned int dwarf_macinfo_size; + + }; + +#define PST_PRIVATE(p) ((struct dwarf2_pinfo *)(p)->read_symtab_private) +#define DWARF_INFO_BUFFER(p) (PST_PRIVATE(p)->dwarf_info_buffer) +#define DWARF_INFO_OFFSET(p) (PST_PRIVATE(p)->dwarf_info_offset) +#define DWARF_ABBREV_BUFFER(p) (PST_PRIVATE(p)->dwarf_abbrev_buffer) +#define DWARF_ABBREV_SIZE(p) (PST_PRIVATE(p)->dwarf_abbrev_size) +#define DWARF_LINE_BUFFER(p) (PST_PRIVATE(p)->dwarf_line_buffer) +#define DWARF_LINE_SIZE(p) (PST_PRIVATE(p)->dwarf_line_size) +#define DWARF_STR_BUFFER(p) (PST_PRIVATE(p)->dwarf_str_buffer) +#define DWARF_STR_SIZE(p) (PST_PRIVATE(p)->dwarf_str_size) +#define DWARF_MACINFO_BUFFER(p) (PST_PRIVATE(p)->dwarf_macinfo_buffer) +#define DWARF_MACINFO_SIZE(p) (PST_PRIVATE(p)->dwarf_macinfo_size) + +/* Maintain an array of referenced fundamental types for the current + compilation unit being read. For DWARF version 1, we have to construct + the fundamental types on the fly, since no information about the + fundamental types is supplied. Each such fundamental type is created by + calling a language dependent routine to create the type, and then a + pointer to that type is then placed in the array at the index specified + by it's FT_<TYPENAME> value. The array has a fixed size set by the + FT_NUM_MEMBERS compile time constant, which is the number of predefined + fundamental types gdb knows how to construct. */ +static struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */ + +/* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, + but this would require a corresponding change in unpack_field_as_long + and friends. */ +static int bits_per_byte = 8; + +/* The routines that read and process dies for a C struct or C++ class + pass lists of data member fields and lists of member function fields + in an instance of a field_info structure, as defined below. */ +struct field_info + { + /* List of data member and baseclasses fields. */ + struct nextfield + { + struct nextfield *next; + int accessibility; + int virtuality; + struct field field; + } + *fields; + + /* Number of fields. */ + int nfields; + + /* Number of baseclasses. */ + int nbaseclasses; + + /* Set if the accesibility of one of the fields is not public. */ + int non_public_fields; + + /* Member function fields array, entries are allocated in the order they + are encountered in the object file. */ + struct nextfnfield + { + struct nextfnfield *next; + struct fn_field fnfield; + } + *fnfields; + + /* Member function fieldlist array, contains name of possibly overloaded + member function, number of overloaded member functions and a pointer + to the head of the member function field chain. */ + struct fnfieldlist + { + char *name; + int length; + struct nextfnfield *head; + } + *fnfieldlists; + + /* Number of entries in the fnfieldlists array. */ + int nfnfields; + }; + +/* Various complaints about symbol reading that don't abort the process */ + +static struct complaint dwarf2_const_ignored = +{ + "type qualifier 'const' ignored", 0, 0 +}; +static struct complaint dwarf2_volatile_ignored = +{ + "type qualifier 'volatile' ignored", 0, 0 +}; +static struct complaint dwarf2_non_const_array_bound_ignored = +{ + "non-constant array bounds form '%s' ignored", 0, 0 +}; +static struct complaint dwarf2_missing_line_number_section = +{ + "missing .debug_line section", 0, 0 +}; +static struct complaint dwarf2_statement_list_fits_in_line_number_section = +{ + "statement list doesn't fit in .debug_line section", 0, 0 +}; +static struct complaint dwarf2_mangled_line_number_section = +{ + "mangled .debug_line section", 0, 0 +}; +static struct complaint dwarf2_unsupported_die_ref_attr = +{ + "unsupported die ref attribute form: '%s'", 0, 0 +}; +static struct complaint dwarf2_unsupported_stack_op = +{ + "unsupported stack op: '%s'", 0, 0 +}; +static struct complaint dwarf2_complex_location_expr = +{ + "location expression too complex", 0, 0 +}; +static struct complaint dwarf2_unsupported_tag = +{ + "unsupported tag: '%s'", 0, 0 +}; +static struct complaint dwarf2_unsupported_at_encoding = +{ + "unsupported DW_AT_encoding: '%s'", 0, 0 +}; +static struct complaint dwarf2_unsupported_at_frame_base = +{ + "unsupported DW_AT_frame_base for function '%s'", 0, 0 +}; +static struct complaint dwarf2_unexpected_tag = +{ + "unexepected tag in read_type_die: '%s'", 0, 0 +}; +static struct complaint dwarf2_missing_at_frame_base = +{ + "DW_AT_frame_base missing for DW_OP_fbreg", 0, 0 +}; +static struct complaint dwarf2_bad_static_member_name = +{ + "unrecognized static data member name '%s'", 0, 0 +}; +static struct complaint dwarf2_unsupported_accessibility = +{ + "unsupported accessibility %d", 0, 0 +}; +static struct complaint dwarf2_bad_member_name_complaint = +{ + "cannot extract member name from '%s'", 0, 0 +}; +static struct complaint dwarf2_missing_member_fn_type_complaint = +{ + "member function type missing for '%s'", 0, 0 +}; +static struct complaint dwarf2_vtbl_not_found_complaint = +{ + "virtual function table pointer not found when defining class '%s'", 0, 0 +}; +static struct complaint dwarf2_absolute_sibling_complaint = +{ + "ignoring absolute DW_AT_sibling", 0, 0 +}; +static struct complaint dwarf2_const_value_length_mismatch = +{ + "const value length mismatch for '%s', got %d, expected %d", 0, 0 +}; +static struct complaint dwarf2_unsupported_const_value_attr = +{ + "unsupported const value attribute form: '%s'", 0, 0 +}; +static struct complaint dwarf2_misplaced_line_number = +{ + "misplaced first line number at 0x%lx for '%s'", 0, 0 +}; +static struct complaint dwarf2_line_header_too_long = +{ + "line number info header doesn't fit in `.debug_line' section", 0, 0 +}; +static struct complaint dwarf2_missing_macinfo_section = +{ + "missing .debug_macinfo section", 0, 0 +}; +static struct complaint dwarf2_macros_too_long = +{ + "macro info runs off end of `.debug_macinfo' section", 0, 0 +}; +static struct complaint dwarf2_macros_not_terminated = +{ + "no terminating 0-type entry for macros in `.debug_macinfo' section", 0, 0 +}; +static struct complaint dwarf2_macro_outside_file = +{ + "debug info gives macro %s outside of any file: %s", 0, 0 +}; +static struct complaint dwarf2_macro_unmatched_end_file = +{ + "macro debug info has an unmatched `close_file' directive", 0, 0 +}; +static struct complaint dwarf2_macro_malformed_definition = +{ + "macro debug info contains a malformed macro definition:\n`%s'", 0, 0 +}; +static struct complaint dwarf2_macro_spaces_in_definition = +{ + "macro definition contains spaces in formal argument list:\n`%s'", 0, 0 +}; +static struct complaint dwarf2_invalid_attrib_class = +{ + "invalid attribute class or form for '%s' in '%s'", 0, 0 +}; + +/* local function prototypes */ + +static void dwarf2_locate_sections (bfd *, asection *, PTR); + +#if 0 +static void dwarf2_build_psymtabs_easy (struct objfile *, int); +#endif + +static void dwarf2_build_psymtabs_hard (struct objfile *, int); + +static char *scan_partial_symbols (char *, struct objfile *, + CORE_ADDR *, CORE_ADDR *, + const struct comp_unit_head *); + +static void add_partial_symbol (struct partial_die_info *, struct objfile *, + const struct comp_unit_head *); + +static void dwarf2_psymtab_to_symtab (struct partial_symtab *); + +static void psymtab_to_symtab_1 (struct partial_symtab *); + +char *dwarf2_read_section (struct objfile *, file_ptr, unsigned int); + +static void dwarf2_read_abbrevs (bfd *, unsigned int); + +static void dwarf2_empty_abbrev_table (PTR); + +static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int); + +static char *read_partial_die (struct partial_die_info *, + bfd *, char *, + const struct comp_unit_head *); + +static char *read_full_die (struct die_info **, bfd *, char *, + const struct comp_unit_head *); + +static char *read_attribute (struct attribute *, struct attr_abbrev *, + bfd *, char *, const struct comp_unit_head *); + +static char *read_attribute_value (struct attribute *, unsigned, + bfd *, char *, const struct comp_unit_head *); + +static unsigned int read_1_byte (bfd *, char *); + +static int read_1_signed_byte (bfd *, char *); + +static unsigned int read_2_bytes (bfd *, char *); + +static unsigned int read_4_bytes (bfd *, char *); + +static unsigned long read_8_bytes (bfd *, char *); + +static CORE_ADDR read_address (bfd *, char *ptr, const struct comp_unit_head *, + int *bytes_read); + +static LONGEST read_initial_length (bfd *, char *, + struct comp_unit_head *, int *bytes_read); + +static LONGEST read_offset (bfd *, char *, const struct comp_unit_head *, + int *bytes_read); + +static char *read_n_bytes (bfd *, char *, unsigned int); + +static char *read_string (bfd *, char *, unsigned int *); + +static char *read_indirect_string (bfd *, char *, const struct comp_unit_head *, + unsigned int *); + +static unsigned long read_unsigned_leb128 (bfd *, char *, unsigned int *); + +static long read_signed_leb128 (bfd *, char *, unsigned int *); + +static void set_cu_language (unsigned int); + +static struct attribute *dwarf_attr (struct die_info *, unsigned int); + +static int die_is_declaration (struct die_info *); + +static void free_line_header (struct line_header *lh); + +static struct line_header *(dwarf_decode_line_header + (unsigned int offset, + bfd *abfd, + const struct comp_unit_head *cu_header)); + +static void dwarf_decode_lines (struct line_header *, char *, bfd *, + const struct comp_unit_head *); + +static void dwarf2_start_subfile (char *, char *); + +static struct symbol *new_symbol (struct die_info *, struct type *, + struct objfile *, const struct comp_unit_head *); + +static void dwarf2_const_value (struct attribute *, struct symbol *, + struct objfile *, const struct comp_unit_head *); + +static void dwarf2_const_value_data (struct attribute *attr, + struct symbol *sym, + int bits); + +static struct type *die_type (struct die_info *, struct objfile *, + const struct comp_unit_head *); + +static struct type *die_containing_type (struct die_info *, struct objfile *, + const struct comp_unit_head *); + +#if 0 +static struct type *type_at_offset (unsigned int, struct objfile *); +#endif + +static struct type *tag_type_to_type (struct die_info *, struct objfile *, + const struct comp_unit_head *); + +static void read_type_die (struct die_info *, struct objfile *, + const struct comp_unit_head *); + +static void read_typedef (struct die_info *, struct objfile *, + const struct comp_unit_head *); + +static void read_base_type (struct die_info *, struct objfile *); + +static void read_file_scope (struct die_info *, struct objfile *, + const struct comp_unit_head *); + +static void read_func_scope (struct die_info *, struct objfile *, + const struct comp_unit_head *); + +static void read_lexical_block_scope (struct die_info *, struct objfile *, + const struct comp_unit_head *); + +static int dwarf2_get_pc_bounds (struct die_info *, + CORE_ADDR *, CORE_ADDR *, struct objfile *); + +static void dwarf2_add_field (struct field_info *, struct die_info *, + struct objfile *, const struct comp_unit_head *); + +static void dwarf2_attach_fields_to_type (struct field_info *, + struct type *, struct objfile *); + +static void dwarf2_add_member_fn (struct field_info *, + struct die_info *, struct type *, + struct objfile *objfile, + const struct comp_unit_head *); + +static void dwarf2_attach_fn_fields_to_type (struct field_info *, + struct type *, struct objfile *); + +static void read_structure_scope (struct die_info *, struct objfile *, + const struct comp_unit_head *); + +static void read_common_block (struct die_info *, struct objfile *, + const struct comp_unit_head *); + +static void read_enumeration (struct die_info *, struct objfile *, + const struct comp_unit_head *); + +static struct type *dwarf_base_type (int, int, struct objfile *); + +static CORE_ADDR decode_locdesc (struct dwarf_block *, struct objfile *, + const struct comp_unit_head *); + +static void read_array_type (struct die_info *, struct objfile *, + const struct comp_unit_head *); + +static void read_tag_pointer_type (struct die_info *, struct objfile *, + const struct comp_unit_head *); + +static void read_tag_ptr_to_member_type (struct die_info *, struct objfile *, + const struct comp_unit_head *); + +static void read_tag_reference_type (struct die_info *, struct objfile *, + const struct comp_unit_head *); + +static void read_tag_const_type (struct die_info *, struct objfile *, + const struct comp_unit_head *); + +static void read_tag_volatile_type (struct die_info *, struct objfile *, + const struct comp_unit_head *); + +static void read_tag_string_type (struct die_info *, struct objfile *); + +static void read_subroutine_type (struct die_info *, struct objfile *, + const struct comp_unit_head *); + +static struct die_info *read_comp_unit (char *, bfd *, + const struct comp_unit_head *); + +static void free_die_list (struct die_info *); + +static struct cleanup *make_cleanup_free_die_list (struct die_info *); + +static void process_die (struct die_info *, struct objfile *, + const struct comp_unit_head *); + +static char *dwarf2_linkage_name (struct die_info *); + +static char *dwarf_tag_name (unsigned int); + +static char *dwarf_attr_name (unsigned int); + +static char *dwarf_form_name (unsigned int); + +static char *dwarf_stack_op_name (unsigned int); + +static char *dwarf_bool_name (unsigned int); + +static char *dwarf_type_encoding_name (unsigned int); + +#if 0 +static char *dwarf_cfi_name (unsigned int); + +struct die_info *copy_die (struct die_info *); +#endif + +static struct die_info *sibling_die (struct die_info *); + +static void dump_die (struct die_info *); + +static void dump_die_list (struct die_info *); + +static void store_in_ref_table (unsigned int, struct die_info *); + +static void dwarf2_empty_hash_tables (void); + +static unsigned int dwarf2_get_ref_die_offset (struct attribute *); + +static struct die_info *follow_die_ref (unsigned int); + +static struct type *dwarf2_fundamental_type (struct objfile *, int); + +/* memory allocation interface */ + +static void dwarf2_free_tmp_obstack (PTR); + +static struct dwarf_block *dwarf_alloc_block (void); + +static struct abbrev_info *dwarf_alloc_abbrev (void); + +static struct die_info *dwarf_alloc_die (void); + +static void initialize_cu_func_list (void); + +static void add_to_cu_func_list (const char *, CORE_ADDR, CORE_ADDR); + +static void dwarf_decode_macros (struct line_header *, unsigned int, + char *, bfd *, const struct comp_unit_head *, + struct objfile *); + +static int attr_form_is_block (struct attribute *); + +/* Try to locate the sections we need for DWARF 2 debugging + information and return true if we have enough to do something. */ + +int +dwarf2_has_info (bfd *abfd) +{ + dwarf_info_offset = 0; + dwarf_abbrev_offset = 0; + dwarf_line_offset = 0; + dwarf_str_offset = 0; + dwarf_macinfo_offset = 0; + dwarf_frame_offset = 0; + dwarf_eh_frame_offset = 0; + bfd_map_over_sections (abfd, dwarf2_locate_sections, NULL); + if (dwarf_info_offset && dwarf_abbrev_offset) + { + return 1; + } + else + { + return 0; + } +} + +/* This function is mapped across the sections and remembers the + offset and size of each of the debugging sections we are interested + in. */ + +static void +dwarf2_locate_sections (bfd *ignore_abfd, asection *sectp, PTR ignore_ptr) +{ + if (STREQ (sectp->name, INFO_SECTION)) + { + dwarf_info_offset = sectp->filepos; + dwarf_info_size = bfd_get_section_size_before_reloc (sectp); + } + else if (STREQ (sectp->name, ABBREV_SECTION)) + { + dwarf_abbrev_offset = sectp->filepos; + dwarf_abbrev_size = bfd_get_section_size_before_reloc (sectp); + } + else if (STREQ (sectp->name, LINE_SECTION)) + { + dwarf_line_offset = sectp->filepos; + dwarf_line_size = bfd_get_section_size_before_reloc (sectp); + } + else if (STREQ (sectp->name, PUBNAMES_SECTION)) + { + dwarf_pubnames_offset = sectp->filepos; + dwarf_pubnames_size = bfd_get_section_size_before_reloc (sectp); + } + else if (STREQ (sectp->name, ARANGES_SECTION)) + { + dwarf_aranges_offset = sectp->filepos; + dwarf_aranges_size = bfd_get_section_size_before_reloc (sectp); + } + else if (STREQ (sectp->name, LOC_SECTION)) + { + dwarf_loc_offset = sectp->filepos; + dwarf_loc_size = bfd_get_section_size_before_reloc (sectp); + } + else if (STREQ (sectp->name, MACINFO_SECTION)) + { + dwarf_macinfo_offset = sectp->filepos; + dwarf_macinfo_size = bfd_get_section_size_before_reloc (sectp); + } + else if (STREQ (sectp->name, STR_SECTION)) + { + dwarf_str_offset = sectp->filepos; + dwarf_str_size = bfd_get_section_size_before_reloc (sectp); + } + else if (STREQ (sectp->name, FRAME_SECTION)) + { + dwarf_frame_offset = sectp->filepos; + dwarf_frame_size = bfd_get_section_size_before_reloc (sectp); + } + else if (STREQ (sectp->name, EH_FRAME_SECTION)) + { + dwarf_eh_frame_offset = sectp->filepos; + dwarf_eh_frame_size = bfd_get_section_size_before_reloc (sectp); + } +} + +/* Build a partial symbol table. */ + +void +dwarf2_build_psymtabs (struct objfile *objfile, int mainline) +{ + + /* We definitely need the .debug_info and .debug_abbrev sections */ + + dwarf_info_buffer = dwarf2_read_section (objfile, + dwarf_info_offset, + dwarf_info_size); + dwarf_abbrev_buffer = dwarf2_read_section (objfile, + dwarf_abbrev_offset, + dwarf_abbrev_size); + + if (dwarf_line_offset) + dwarf_line_buffer = dwarf2_read_section (objfile, + dwarf_line_offset, + dwarf_line_size); + else + dwarf_line_buffer = NULL; + + if (dwarf_str_offset) + dwarf_str_buffer = dwarf2_read_section (objfile, + dwarf_str_offset, + dwarf_str_size); + else + dwarf_str_buffer = NULL; + + if (dwarf_macinfo_offset) + dwarf_macinfo_buffer = dwarf2_read_section (objfile, + dwarf_macinfo_offset, + dwarf_macinfo_size); + else + dwarf_macinfo_buffer = NULL; + + if (mainline + || (objfile->global_psymbols.size == 0 + && objfile->static_psymbols.size == 0)) + { + init_psymbol_list (objfile, 1024); + } + +#if 0 + if (dwarf_aranges_offset && dwarf_pubnames_offset) + { + /* Things are significantly easier if we have .debug_aranges and + .debug_pubnames sections */ + + dwarf2_build_psymtabs_easy (objfile, mainline); + } + else +#endif + /* only test this case for now */ + { + /* In this case we have to work a bit harder */ + dwarf2_build_psymtabs_hard (objfile, mainline); + } +} + +#if 0 +/* Build the partial symbol table from the information in the + .debug_pubnames and .debug_aranges sections. */ + +static void +dwarf2_build_psymtabs_easy (struct objfile *objfile, int mainline) +{ + bfd *abfd = objfile->obfd; + char *aranges_buffer, *pubnames_buffer; + char *aranges_ptr, *pubnames_ptr; + unsigned int entry_length, version, info_offset, info_size; + + pubnames_buffer = dwarf2_read_section (objfile, + dwarf_pubnames_offset, + dwarf_pubnames_size); + pubnames_ptr = pubnames_buffer; + while ((pubnames_ptr - pubnames_buffer) < dwarf_pubnames_size) + { + struct comp_unit_head cu_header; + int bytes_read; + + entry_length = read_initial_length (abfd, pubnames_ptr, &cu_header, + &bytes_read); + pubnames_ptr += bytes_read; + version = read_1_byte (abfd, pubnames_ptr); + pubnames_ptr += 1; + info_offset = read_4_bytes (abfd, pubnames_ptr); + pubnames_ptr += 4; + info_size = read_4_bytes (abfd, pubnames_ptr); + pubnames_ptr += 4; + } + + aranges_buffer = dwarf2_read_section (objfile, + dwarf_aranges_offset, + dwarf_aranges_size); + +} +#endif + +/* Read in the comp unit header information from the debug_info at + info_ptr. */ + +static char * +read_comp_unit_head (struct comp_unit_head *cu_header, + char *info_ptr, bfd *abfd) +{ + int signed_addr; + int bytes_read; + cu_header->length = read_initial_length (abfd, info_ptr, cu_header, + &bytes_read); + info_ptr += bytes_read; + cu_header->version = read_2_bytes (abfd, info_ptr); + info_ptr += 2; + cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header, + &bytes_read); + info_ptr += bytes_read; + cu_header->addr_size = read_1_byte (abfd, info_ptr); + info_ptr += 1; + signed_addr = bfd_get_sign_extend_vma (abfd); + if (signed_addr < 0) + internal_error (__FILE__, __LINE__, + "read_comp_unit_head: dwarf from non elf file"); + cu_header->signed_addr_p = signed_addr; + return info_ptr; +} + +/* Build the partial symbol table by doing a quick pass through the + .debug_info and .debug_abbrev sections. */ + +static void +dwarf2_build_psymtabs_hard (struct objfile *objfile, int mainline) +{ + /* Instead of reading this into a big buffer, we should probably use + mmap() on architectures that support it. (FIXME) */ + bfd *abfd = objfile->obfd; + char *info_ptr, *abbrev_ptr; + char *beg_of_comp_unit; + struct partial_die_info comp_unit_die; + struct partial_symtab *pst; + struct cleanup *back_to; + CORE_ADDR lowpc, highpc; + + info_ptr = dwarf_info_buffer; + abbrev_ptr = dwarf_abbrev_buffer; + + /* We use dwarf2_tmp_obstack for objects that don't need to survive + the partial symbol scan, like attribute values. + + We could reduce our peak memory consumption during partial symbol + table construction by freeing stuff from this obstack more often + --- say, after processing each compilation unit, or each die --- + but it turns out that this saves almost nothing. For an + executable with 11Mb of Dwarf 2 data, I found about 64k allocated + on dwarf2_tmp_obstack. Some investigation showed: + + 1) 69% of the attributes used forms DW_FORM_addr, DW_FORM_data*, + DW_FORM_flag, DW_FORM_[su]data, and DW_FORM_ref*. These are + all fixed-length values not requiring dynamic allocation. + + 2) 30% of the attributes used the form DW_FORM_string. For + DW_FORM_string, read_attribute simply hands back a pointer to + the null-terminated string in dwarf_info_buffer, so no dynamic + allocation is needed there either. + + 3) The remaining 1% of the attributes all used DW_FORM_block1. + 75% of those were DW_AT_frame_base location lists for + functions; the rest were DW_AT_location attributes, probably + for the global variables. + + Anyway, what this all means is that the memory the dwarf2 + reader uses as temporary space reading partial symbols is about + 0.5% as much as we use for dwarf_*_buffer. That's noise. */ + + obstack_init (&dwarf2_tmp_obstack); + back_to = make_cleanup (dwarf2_free_tmp_obstack, NULL); + + /* Since the objects we're extracting from dwarf_info_buffer vary in + length, only the individual functions to extract them (like + read_comp_unit_head and read_partial_die) can really know whether + the buffer is large enough to hold another complete object. + + At the moment, they don't actually check that. If + dwarf_info_buffer holds just one extra byte after the last + compilation unit's dies, then read_comp_unit_head will happily + read off the end of the buffer. read_partial_die is similarly + casual. Those functions should be fixed. + + For this loop condition, simply checking whether there's any data + left at all should be sufficient. */ + while (info_ptr < dwarf_info_buffer + dwarf_info_size) + { + struct comp_unit_head cu_header; + beg_of_comp_unit = info_ptr; + info_ptr = read_comp_unit_head (&cu_header, info_ptr, abfd); + + if (cu_header.version != 2) + { + error ("Dwarf Error: wrong version in compilation unit header."); + return; + } + if (cu_header.abbrev_offset >= dwarf_abbrev_size) + { + error ("Dwarf Error: bad offset (0x%lx) in compilation unit header (offset 0x%lx + 6).", + (long) cu_header.abbrev_offset, + (long) (beg_of_comp_unit - dwarf_info_buffer)); + return; + } + if (beg_of_comp_unit + cu_header.length + cu_header.initial_length_size + > dwarf_info_buffer + dwarf_info_size) + { + error ("Dwarf Error: bad length (0x%lx) in compilation unit header (offset 0x%lx + 0).", + (long) cu_header.length, + (long) (beg_of_comp_unit - dwarf_info_buffer)); + return; + } + /* Read the abbrevs for this compilation unit into a table */ + dwarf2_read_abbrevs (abfd, cu_header.abbrev_offset); + make_cleanup (dwarf2_empty_abbrev_table, NULL); + + /* Read the compilation unit die */ + info_ptr = read_partial_die (&comp_unit_die, abfd, info_ptr, + &cu_header); + + /* Set the language we're debugging */ + set_cu_language (comp_unit_die.language); + + /* Allocate a new partial symbol table structure */ + pst = start_psymtab_common (objfile, objfile->section_offsets, + comp_unit_die.name ? comp_unit_die.name : "", + comp_unit_die.lowpc, + objfile->global_psymbols.next, + objfile->static_psymbols.next); + + pst->read_symtab_private = (char *) + obstack_alloc (&objfile->psymbol_obstack, sizeof (struct dwarf2_pinfo)); + cu_header_offset = beg_of_comp_unit - dwarf_info_buffer; + DWARF_INFO_BUFFER (pst) = dwarf_info_buffer; + DWARF_INFO_OFFSET (pst) = beg_of_comp_unit - dwarf_info_buffer; + DWARF_ABBREV_BUFFER (pst) = dwarf_abbrev_buffer; + DWARF_ABBREV_SIZE (pst) = dwarf_abbrev_size; + DWARF_LINE_BUFFER (pst) = dwarf_line_buffer; + DWARF_LINE_SIZE (pst) = dwarf_line_size; + DWARF_STR_BUFFER (pst) = dwarf_str_buffer; + DWARF_STR_SIZE (pst) = dwarf_str_size; + DWARF_MACINFO_BUFFER (pst) = dwarf_macinfo_buffer; + DWARF_MACINFO_SIZE (pst) = dwarf_macinfo_size; + baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); + + /* Store the function that reads in the rest of the symbol table */ + pst->read_symtab = dwarf2_psymtab_to_symtab; + + /* Check if comp unit has_children. + If so, read the rest of the partial symbols from this comp unit. + If not, there's no more debug_info for this comp unit. */ + if (comp_unit_die.has_children) + { + info_ptr = scan_partial_symbols (info_ptr, objfile, &lowpc, &highpc, + &cu_header); + + /* If the compilation unit didn't have an explicit address range, + then use the information extracted from its child dies. */ + if (! comp_unit_die.has_pc_info) + { + comp_unit_die.lowpc = lowpc; + comp_unit_die.highpc = highpc; + } + } + pst->textlow = comp_unit_die.lowpc + baseaddr; + pst->texthigh = comp_unit_die.highpc + baseaddr; + + pst->n_global_syms = objfile->global_psymbols.next - + (objfile->global_psymbols.list + pst->globals_offset); + pst->n_static_syms = objfile->static_psymbols.next - + (objfile->static_psymbols.list + pst->statics_offset); + sort_pst_symbols (pst); + + /* If there is already a psymtab or symtab for a file of this + name, remove it. (If there is a symtab, more drastic things + also happen.) This happens in VxWorks. */ + free_named_symtabs (pst->filename); + + info_ptr = beg_of_comp_unit + cu_header.length + + cu_header.initial_length_size; + } + do_cleanups (back_to); +} + +/* Read in all interesting dies to the end of the compilation unit. */ + +static char * +scan_partial_symbols (char *info_ptr, struct objfile *objfile, + CORE_ADDR *lowpc, CORE_ADDR *highpc, + const struct comp_unit_head *cu_header) +{ + bfd *abfd = objfile->obfd; + struct partial_die_info pdi; + + /* This function is called after we've read in the comp_unit_die in + order to read its children. We start the nesting level at 1 since + we have pushed 1 level down in order to read the comp unit's children. + The comp unit itself is at level 0, so we stop reading when we pop + back to that level. */ + + int nesting_level = 1; + + *lowpc = ((CORE_ADDR) -1); + *highpc = ((CORE_ADDR) 0); + + while (nesting_level) + { + info_ptr = read_partial_die (&pdi, abfd, info_ptr, cu_header); + + if (pdi.name) + { + switch (pdi.tag) + { + case DW_TAG_subprogram: + if (pdi.has_pc_info) + { + if (pdi.lowpc < *lowpc) + { + *lowpc = pdi.lowpc; + } + if (pdi.highpc > *highpc) + { + *highpc = pdi.highpc; + } + if ((pdi.is_external || nesting_level == 1) + && !pdi.is_declaration) + { + add_partial_symbol (&pdi, objfile, cu_header); + } + } + break; + case DW_TAG_variable: + case DW_TAG_typedef: + case DW_TAG_class_type: + case DW_TAG_structure_type: + case DW_TAG_union_type: + case DW_TAG_enumeration_type: + if ((pdi.is_external || nesting_level == 1) + && !pdi.is_declaration) + { + add_partial_symbol (&pdi, objfile, cu_header); + } + break; + case DW_TAG_enumerator: + /* File scope enumerators are added to the partial symbol + table. */ + if (nesting_level == 2) + add_partial_symbol (&pdi, objfile, cu_header); + break; + case DW_TAG_base_type: + /* File scope base type definitions are added to the partial + symbol table. */ + if (nesting_level == 1) + add_partial_symbol (&pdi, objfile, cu_header); + break; + default: + break; + } + } + + /* If the die has a sibling, skip to the sibling. + Do not skip enumeration types, we want to record their + enumerators. */ + if (pdi.sibling && pdi.tag != DW_TAG_enumeration_type) + { + info_ptr = pdi.sibling; + } + else if (pdi.has_children) + { + /* Die has children, but the optional DW_AT_sibling attribute + is missing. */ + nesting_level++; + } + + if (pdi.tag == 0) + { + nesting_level--; + } + } + + /* If we didn't find a lowpc, set it to highpc to avoid complaints + from `maint check'. */ + if (*lowpc == ((CORE_ADDR) -1)) + *lowpc = *highpc; + return info_ptr; +} + +static void +add_partial_symbol (struct partial_die_info *pdi, struct objfile *objfile, + const struct comp_unit_head *cu_header) +{ + CORE_ADDR addr = 0; + + switch (pdi->tag) + { + case DW_TAG_subprogram: + if (pdi->is_external) + { + /*prim_record_minimal_symbol (pdi->name, pdi->lowpc + baseaddr, + mst_text, objfile); */ + add_psymbol_to_list (pdi->name, strlen (pdi->name), + VAR_NAMESPACE, LOC_BLOCK, + &objfile->global_psymbols, + 0, pdi->lowpc + baseaddr, cu_language, objfile); + } + else + { + /*prim_record_minimal_symbol (pdi->name, pdi->lowpc + baseaddr, + mst_file_text, objfile); */ + add_psymbol_to_list (pdi->name, strlen (pdi->name), + VAR_NAMESPACE, LOC_BLOCK, + &objfile->static_psymbols, + 0, pdi->lowpc + baseaddr, cu_language, objfile); + } + break; + case DW_TAG_variable: + if (pdi->is_external) + { + /* Global Variable. + Don't enter into the minimal symbol tables as there is + a minimal symbol table entry from the ELF symbols already. + Enter into partial symbol table if it has a location + descriptor or a type. + If the location descriptor is missing, new_symbol will create + a LOC_UNRESOLVED symbol, the address of the variable will then + be determined from the minimal symbol table whenever the variable + is referenced. + The address for the partial symbol table entry is not + used by GDB, but it comes in handy for debugging partial symbol + table building. */ + + if (pdi->locdesc) + addr = decode_locdesc (pdi->locdesc, objfile, cu_header); + if (pdi->locdesc || pdi->has_type) + add_psymbol_to_list (pdi->name, strlen (pdi->name), + VAR_NAMESPACE, LOC_STATIC, + &objfile->global_psymbols, + 0, addr + baseaddr, cu_language, objfile); + } + else + { + /* Static Variable. Skip symbols without location descriptors. */ + if (pdi->locdesc == NULL) + return; + addr = decode_locdesc (pdi->locdesc, objfile, cu_header); + /*prim_record_minimal_symbol (pdi->name, addr + baseaddr, + mst_file_data, objfile); */ + add_psymbol_to_list (pdi->name, strlen (pdi->name), + VAR_NAMESPACE, LOC_STATIC, + &objfile->static_psymbols, + 0, addr + baseaddr, cu_language, objfile); + } + break; + case DW_TAG_typedef: + case DW_TAG_base_type: + add_psymbol_to_list (pdi->name, strlen (pdi->name), + VAR_NAMESPACE, LOC_TYPEDEF, + &objfile->static_psymbols, + 0, (CORE_ADDR) 0, cu_language, objfile); + break; + case DW_TAG_class_type: + case DW_TAG_structure_type: + case DW_TAG_union_type: + case DW_TAG_enumeration_type: + /* Skip aggregate types without children, these are external + references. */ + if (pdi->has_children == 0) + return; + add_psymbol_to_list (pdi->name, strlen (pdi->name), + STRUCT_NAMESPACE, LOC_TYPEDEF, + &objfile->static_psymbols, + 0, (CORE_ADDR) 0, cu_language, objfile); + + if (cu_language == language_cplus) + { + /* For C++, these implicitly act as typedefs as well. */ + add_psymbol_to_list (pdi->name, strlen (pdi->name), + VAR_NAMESPACE, LOC_TYPEDEF, + &objfile->static_psymbols, + 0, (CORE_ADDR) 0, cu_language, objfile); + } + break; + case DW_TAG_enumerator: + add_psymbol_to_list (pdi->name, strlen (pdi->name), + VAR_NAMESPACE, LOC_CONST, + &objfile->static_psymbols, + 0, (CORE_ADDR) 0, cu_language, objfile); + break; + default: + break; + } +} + +/* Expand this partial symbol table into a full symbol table. */ + +static void +dwarf2_psymtab_to_symtab (struct partial_symtab *pst) +{ + /* FIXME: This is barely more than a stub. */ + if (pst != NULL) + { + if (pst->readin) + { + warning ("bug: psymtab for %s is already read in.", pst->filename); + } + else + { + if (info_verbose) + { + printf_filtered ("Reading in symbols for %s...", pst->filename); + gdb_flush (gdb_stdout); + } + + psymtab_to_symtab_1 (pst); + + /* Finish up the debug error message. */ + if (info_verbose) + printf_filtered ("done.\n"); + } + } +} + +static void +psymtab_to_symtab_1 (struct partial_symtab *pst) +{ + struct objfile *objfile = pst->objfile; + bfd *abfd = objfile->obfd; + struct comp_unit_head cu_header; + struct die_info *dies; + unsigned long offset; + CORE_ADDR lowpc, highpc; + struct die_info *child_die; + char *info_ptr; + struct symtab *symtab; + struct cleanup *back_to; + + /* Set local variables from the partial symbol table info. */ + offset = DWARF_INFO_OFFSET (pst); + dwarf_info_buffer = DWARF_INFO_BUFFER (pst); + dwarf_abbrev_buffer = DWARF_ABBREV_BUFFER (pst); + dwarf_abbrev_size = DWARF_ABBREV_SIZE (pst); + dwarf_line_buffer = DWARF_LINE_BUFFER (pst); + dwarf_line_size = DWARF_LINE_SIZE (pst); + dwarf_str_buffer = DWARF_STR_BUFFER (pst); + dwarf_str_size = DWARF_STR_SIZE (pst); + dwarf_macinfo_buffer = DWARF_MACINFO_BUFFER (pst); + dwarf_macinfo_size = DWARF_MACINFO_SIZE (pst); + baseaddr = ANOFFSET (pst->section_offsets, SECT_OFF_TEXT (objfile)); + cu_header_offset = offset; + info_ptr = dwarf_info_buffer + offset; + + obstack_init (&dwarf2_tmp_obstack); + back_to = make_cleanup (dwarf2_free_tmp_obstack, NULL); + + buildsym_init (); + make_cleanup (really_free_pendings, NULL); + + /* read in the comp_unit header */ + info_ptr = read_comp_unit_head (&cu_header, info_ptr, abfd); + + /* Read the abbrevs for this compilation unit */ + dwarf2_read_abbrevs (abfd, cu_header.abbrev_offset); + make_cleanup (dwarf2_empty_abbrev_table, NULL); + + dies = read_comp_unit (info_ptr, abfd, &cu_header); + + make_cleanup_free_die_list (dies); + + /* Do line number decoding in read_file_scope () */ + process_die (dies, objfile, &cu_header); + + if (!dwarf2_get_pc_bounds (dies, &lowpc, &highpc, objfile)) + { + /* Some compilers don't define a DW_AT_high_pc attribute for + the compilation unit. If the DW_AT_high_pc is missing, + synthesize it, by scanning the DIE's below the compilation unit. */ + highpc = 0; + if (dies->has_children) + { + child_die = dies->next; + while (child_die && child_die->tag) + { + if (child_die->tag == DW_TAG_subprogram) + { + CORE_ADDR low, high; + + if (dwarf2_get_pc_bounds (child_die, &low, &high, objfile)) + { + highpc = max (highpc, high); + } + } + child_die = sibling_die (child_die); + } + } + } + symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile)); + + /* Set symtab language to language from DW_AT_language. + If the compilation is from a C file generated by language preprocessors, + do not set the language if it was already deduced by start_subfile. */ + if (symtab != NULL + && !(cu_language == language_c && symtab->language != language_c)) + { + symtab->language = cu_language; + } + pst->symtab = symtab; + pst->readin = 1; + sort_symtab_syms (pst->symtab); + + do_cleanups (back_to); +} + +/* Process a die and its children. */ + +static void +process_die (struct die_info *die, struct objfile *objfile, + const struct comp_unit_head *cu_header) +{ + switch (die->tag) + { + case DW_TAG_padding: + break; + case DW_TAG_compile_unit: + read_file_scope (die, objfile, cu_header); + break; + case DW_TAG_subprogram: + read_subroutine_type (die, objfile, cu_header); + read_func_scope (die, objfile, cu_header); + break; + case DW_TAG_inlined_subroutine: + /* FIXME: These are ignored for now. + They could be used to set breakpoints on all inlined instances + of a function and make GDB `next' properly over inlined functions. */ + break; + case DW_TAG_lexical_block: + read_lexical_block_scope (die, objfile, cu_header); + break; + case DW_TAG_class_type: + case DW_TAG_structure_type: + case DW_TAG_union_type: + read_structure_scope (die, objfile, cu_header); + break; + case DW_TAG_enumeration_type: + read_enumeration (die, objfile, cu_header); + break; + case DW_TAG_subroutine_type: + read_subroutine_type (die, objfile, cu_header); + break; + case DW_TAG_array_type: + read_array_type (die, objfile, cu_header); + break; + case DW_TAG_pointer_type: + read_tag_pointer_type (die, objfile, cu_header); + break; + case DW_TAG_ptr_to_member_type: + read_tag_ptr_to_member_type (die, objfile, cu_header); + break; + case DW_TAG_reference_type: + read_tag_reference_type (die, objfile, cu_header); + break; + case DW_TAG_string_type: + read_tag_string_type (die, objfile); + break; + case DW_TAG_base_type: + read_base_type (die, objfile); + if (dwarf_attr (die, DW_AT_name)) + { + /* Add a typedef symbol for the base type definition. */ + new_symbol (die, die->type, objfile, cu_header); + } + break; + case DW_TAG_common_block: + read_common_block (die, objfile, cu_header); + break; + case DW_TAG_common_inclusion: + break; + default: + new_symbol (die, NULL, objfile, cu_header); + break; + } +} + +static void +initialize_cu_func_list (void) +{ + cu_first_fn = cu_last_fn = cu_cached_fn = NULL; +} + +static void +read_file_scope (struct die_info *die, struct objfile *objfile, + const struct comp_unit_head *cu_header) +{ + struct cleanup *back_to = make_cleanup (null_cleanup, 0); + CORE_ADDR lowpc = ((CORE_ADDR) -1); + CORE_ADDR highpc = ((CORE_ADDR) 0); + struct attribute *attr; + char *name = "<unknown>"; + char *comp_dir = NULL; + struct die_info *child_die; + bfd *abfd = objfile->obfd; + struct line_header *line_header = 0; + + if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile)) + { + if (die->has_children) + { + child_die = die->next; + while (child_die && child_die->tag) + { + if (child_die->tag == DW_TAG_subprogram) + { + CORE_ADDR low, high; + + if (dwarf2_get_pc_bounds (child_die, &low, &high, objfile)) + { + lowpc = min (lowpc, low); + highpc = max (highpc, high); + } + } + child_die = sibling_die (child_die); + } + } + } + + /* If we didn't find a lowpc, set it to highpc to avoid complaints + from finish_block. */ + if (lowpc == ((CORE_ADDR) -1)) + lowpc = highpc; + lowpc += baseaddr; + highpc += baseaddr; + + attr = dwarf_attr (die, DW_AT_name); + if (attr) + { + name = DW_STRING (attr); + } + attr = dwarf_attr (die, DW_AT_comp_dir); + if (attr) + { + comp_dir = DW_STRING (attr); + if (comp_dir) + { + /* Irix 6.2 native cc prepends <machine>.: to the compilation + directory, get rid of it. */ + char *cp = strchr (comp_dir, ':'); + + if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/') + comp_dir = cp + 1; + } + } + + if (objfile->ei.entry_point >= lowpc && + objfile->ei.entry_point < highpc) + { + objfile->ei.entry_file_lowpc = lowpc; + objfile->ei.entry_file_highpc = highpc; + } + + attr = dwarf_attr (die, DW_AT_language); + if (attr) + { + set_cu_language (DW_UNSND (attr)); + } + + /* We assume that we're processing GCC output. */ + processing_gcc_compilation = 2; +#if 0 + /* FIXME:Do something here. */ + if (dip->at_producer != NULL) + { + handle_producer (dip->at_producer); + } +#endif + + /* The compilation unit may be in a different language or objfile, + zero out all remembered fundamental types. */ + memset (ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *)); + + start_symtab (name, comp_dir, lowpc); + record_debugformat ("DWARF 2"); + + initialize_cu_func_list (); + + /* Process all dies in compilation unit. */ + if (die->has_children) + { + child_die = die->next; + while (child_die && child_die->tag) + { + process_die (child_die, objfile, cu_header); + child_die = sibling_die (child_die); + } + } + + /* Decode line number information if present. */ + attr = dwarf_attr (die, DW_AT_stmt_list); + if (attr) + { + unsigned int line_offset = DW_UNSND (attr); + line_header = dwarf_decode_line_header (line_offset, + abfd, cu_header); + if (line_header) + { + make_cleanup ((make_cleanup_ftype *) free_line_header, + (void *) line_header); + dwarf_decode_lines (line_header, comp_dir, abfd, cu_header); + } + } + + /* Decode macro information, if present. Dwarf 2 macro information + refers to information in the line number info statement program + header, so we can only read it if we've read the header + successfully. */ + attr = dwarf_attr (die, DW_AT_macro_info); + if (attr && line_header) + { + unsigned int macro_offset = DW_UNSND (attr); + dwarf_decode_macros (line_header, macro_offset, + comp_dir, abfd, cu_header, objfile); + } + do_cleanups (back_to); +} + +static void +add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc) +{ + struct function_range *thisfn; + + thisfn = (struct function_range *) + obstack_alloc (&dwarf2_tmp_obstack, sizeof (struct function_range)); + thisfn->name = name; + thisfn->lowpc = lowpc; + thisfn->highpc = highpc; + thisfn->seen_line = 0; + thisfn->next = NULL; + + if (cu_last_fn == NULL) + cu_first_fn = thisfn; + else + cu_last_fn->next = thisfn; + + cu_last_fn = thisfn; +} + +static void +read_func_scope (struct die_info *die, struct objfile *objfile, + const struct comp_unit_head *cu_header) +{ + register struct context_stack *new; + CORE_ADDR lowpc; + CORE_ADDR highpc; + struct die_info *child_die; + struct attribute *attr; + char *name; + + name = dwarf2_linkage_name (die); + + /* Ignore functions with missing or empty names and functions with + missing or invalid low and high pc attributes. */ + if (name == NULL || !dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile)) + return; + + lowpc += baseaddr; + highpc += baseaddr; + + /* Record the function range for dwarf_decode_lines. */ + add_to_cu_func_list (name, lowpc, highpc); + + if (objfile->ei.entry_point >= lowpc && + objfile->ei.entry_point < highpc) + { + objfile->ei.entry_func_lowpc = lowpc; + objfile->ei.entry_func_highpc = highpc; + } + + /* Decode DW_AT_frame_base location descriptor if present, keep result + for DW_OP_fbreg operands in decode_locdesc. */ + frame_base_reg = -1; + frame_base_offset = 0; + attr = dwarf_attr (die, DW_AT_frame_base); + if (attr) + { + CORE_ADDR addr; + + /* Support the .debug_loc offsets */ + if (attr_form_is_block (attr)) + { + addr = decode_locdesc (DW_BLOCK (attr), objfile, cu_header); + } + else if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8) + { + complain (&dwarf2_complex_location_expr); + addr = 0; + } + else + { + complain (&dwarf2_invalid_attrib_class, "DW_AT_frame_base", name); + addr = 0; + } + + if (isderef) + complain (&dwarf2_unsupported_at_frame_base, name); + else if (isreg) + frame_base_reg = addr; + else if (offreg) + { + frame_base_reg = basereg; + frame_base_offset = addr; + } + else + complain (&dwarf2_unsupported_at_frame_base, name); + } + + new = push_context (0, lowpc); + new->name = new_symbol (die, die->type, objfile, cu_header); + list_in_scope = &local_symbols; + + if (die->has_children) + { + child_die = die->next; + while (child_die && child_die->tag) + { + process_die (child_die, objfile, cu_header); + child_die = sibling_die (child_die); + } + } + + new = pop_context (); + /* Make a block for the local symbols within. */ + finish_block (new->name, &local_symbols, new->old_blocks, + lowpc, highpc, objfile); + list_in_scope = &file_symbols; +} + +/* Process all the DIES contained within a lexical block scope. Start + a new scope, process the dies, and then close the scope. */ + +static void +read_lexical_block_scope (struct die_info *die, struct objfile *objfile, + const struct comp_unit_head *cu_header) +{ + register struct context_stack *new; + CORE_ADDR lowpc, highpc; + struct die_info *child_die; + + /* Ignore blocks with missing or invalid low and high pc attributes. */ + if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, objfile)) + return; + lowpc += baseaddr; + highpc += baseaddr; + + push_context (0, lowpc); + if (die->has_children) + { + child_die = die->next; + while (child_die && child_die->tag) + { + process_die (child_die, objfile, cu_header); + child_die = sibling_die (child_die); + } + } + new = pop_context (); + + if (local_symbols != NULL) + { + finish_block (0, &local_symbols, new->old_blocks, new->start_addr, + highpc, objfile); + } + local_symbols = new->locals; +} + +/* Get low and high pc attributes from a die. + Return 1 if the attributes are present and valid, otherwise, return 0. */ + +static int +dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, CORE_ADDR *highpc, + struct objfile *objfile) +{ + struct attribute *attr; + CORE_ADDR low; + CORE_ADDR high; + + attr = dwarf_attr (die, DW_AT_low_pc); + if (attr) + low = DW_ADDR (attr); + else + return 0; + attr = dwarf_attr (die, DW_AT_high_pc); + if (attr) + high = DW_ADDR (attr); + else + return 0; + + if (high < low) + return 0; + + /* When using the GNU linker, .gnu.linkonce. sections are used to + eliminate duplicate copies of functions and vtables and such. + The linker will arbitrarily choose one and discard the others. + The AT_*_pc values for such functions refer to local labels in + these sections. If the section from that file was discarded, the + labels are not in the output, so the relocs get a value of 0. + If this is a discarded function, mark the pc bounds as invalid, + so that GDB will ignore it. */ + if (low == 0 && (bfd_get_file_flags (objfile->obfd) & HAS_RELOC) == 0) + return 0; + + *lowpc = low; + *highpc = high; + return 1; +} + +/* Add an aggregate field to the field list. */ + +static void +dwarf2_add_field (struct field_info *fip, struct die_info *die, + struct objfile *objfile, + const struct comp_unit_head *cu_header) +{ + struct nextfield *new_field; + struct attribute *attr; + struct field *fp; + char *fieldname = ""; + + /* Allocate a new field list entry and link it in. */ + new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield)); + make_cleanup (xfree, new_field); + memset (new_field, 0, sizeof (struct nextfield)); + new_field->next = fip->fields; + fip->fields = new_field; + fip->nfields++; + + /* Handle accessibility and virtuality of field. + The default accessibility for members is public, the default + accessibility for inheritance is private. */ + if (die->tag != DW_TAG_inheritance) + new_field->accessibility = DW_ACCESS_public; + else + new_field->accessibility = DW_ACCESS_private; + new_field->virtuality = DW_VIRTUALITY_none; + + attr = dwarf_attr (die, DW_AT_accessibility); + if (attr) + new_field->accessibility = DW_UNSND (attr); + if (new_field->accessibility != DW_ACCESS_public) + fip->non_public_fields = 1; + attr = dwarf_attr (die, DW_AT_virtuality); + if (attr) + new_field->virtuality = DW_UNSND (attr); + + fp = &new_field->field; + if (die->tag == DW_TAG_member) + { + /* Get type of field. */ + fp->type = die_type (die, objfile, cu_header); + + /* Get bit size of field (zero if none). */ + attr = dwarf_attr (die, DW_AT_bit_size); + if (attr) + { + FIELD_BITSIZE (*fp) = DW_UNSND (attr); + } + else + { + FIELD_BITSIZE (*fp) = 0; + } + + /* Get bit offset of field. */ + attr = dwarf_attr (die, DW_AT_data_member_location); + if (attr) + { + FIELD_BITPOS (*fp) = + decode_locdesc (DW_BLOCK (attr), objfile, cu_header) * bits_per_byte; + } + else + FIELD_BITPOS (*fp) = 0; + attr = dwarf_attr (die, DW_AT_bit_offset); + if (attr) + { + if (BITS_BIG_ENDIAN) + { + /* For big endian bits, the DW_AT_bit_offset gives the + additional bit offset from the MSB of the containing + anonymous object to the MSB of the field. We don't + have to do anything special since we don't need to + know the size of the anonymous object. */ + FIELD_BITPOS (*fp) += DW_UNSND (attr); + } + else + { + /* For little endian bits, compute the bit offset to the + MSB of the anonymous object, subtract off the number of + bits from the MSB of the field to the MSB of the + object, and then subtract off the number of bits of + the field itself. The result is the bit offset of + the LSB of the field. */ + int anonymous_size; + int bit_offset = DW_UNSND (attr); + + attr = dwarf_attr (die, DW_AT_byte_size); + if (attr) + { + /* The size of the anonymous object containing + the bit field is explicit, so use the + indicated size (in bytes). */ + anonymous_size = DW_UNSND (attr); + } + else + { + /* The size of the anonymous object containing + the bit field must be inferred from the type + attribute of the data member containing the + bit field. */ + anonymous_size = TYPE_LENGTH (fp->type); + } + FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte + - bit_offset - FIELD_BITSIZE (*fp); + } + } + + /* Get name of field. */ + attr = dwarf_attr (die, DW_AT_name); + if (attr && DW_STRING (attr)) + fieldname = DW_STRING (attr); + fp->name = obsavestring (fieldname, strlen (fieldname), + &objfile->type_obstack); + + /* Change accessibility for artificial fields (e.g. virtual table + pointer or virtual base class pointer) to private. */ + if (dwarf_attr (die, DW_AT_artificial)) + { + new_field->accessibility = DW_ACCESS_private; + fip->non_public_fields = 1; + } + } + else if (die->tag == DW_TAG_variable) + { + char *physname; + + /* C++ static member. + Get name of field. */ + attr = dwarf_attr (die, DW_AT_name); + if (attr && DW_STRING (attr)) + fieldname = DW_STRING (attr); + else + return; + + /* Get physical name. */ + physname = dwarf2_linkage_name (die); + + SET_FIELD_PHYSNAME (*fp, obsavestring (physname, strlen (physname), + &objfile->type_obstack)); + FIELD_TYPE (*fp) = die_type (die, objfile, cu_header); + FIELD_NAME (*fp) = obsavestring (fieldname, strlen (fieldname), + &objfile->type_obstack); + } + else if (die->tag == DW_TAG_inheritance) + { + /* C++ base class field. */ + attr = dwarf_attr (die, DW_AT_data_member_location); + if (attr) + FIELD_BITPOS (*fp) = (decode_locdesc (DW_BLOCK (attr), objfile, cu_header) + * bits_per_byte); + FIELD_BITSIZE (*fp) = 0; + FIELD_TYPE (*fp) = die_type (die, objfile, cu_header); + FIELD_NAME (*fp) = type_name_no_tag (fp->type); + fip->nbaseclasses++; + } +} + +/* Create the vector of fields, and attach it to the type. */ + +static void +dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, + struct objfile *objfile) +{ + int nfields = fip->nfields; + + /* Record the field count, allocate space for the array of fields, + and create blank accessibility bitfields if necessary. */ + TYPE_NFIELDS (type) = nfields; + TYPE_FIELDS (type) = (struct field *) + TYPE_ALLOC (type, sizeof (struct field) * nfields); + memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); + + if (fip->non_public_fields) + { + ALLOCATE_CPLUS_STRUCT_TYPE (type); + + TYPE_FIELD_PRIVATE_BITS (type) = + (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); + B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); + + TYPE_FIELD_PROTECTED_BITS (type) = + (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); + B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); + + TYPE_FIELD_IGNORE_BITS (type) = + (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); + B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); + } + + /* If the type has baseclasses, allocate and clear a bit vector for + TYPE_FIELD_VIRTUAL_BITS. */ + if (fip->nbaseclasses) + { + int num_bytes = B_BYTES (fip->nbaseclasses); + char *pointer; + + ALLOCATE_CPLUS_STRUCT_TYPE (type); + pointer = (char *) TYPE_ALLOC (type, num_bytes); + TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer; + B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); + TYPE_N_BASECLASSES (type) = fip->nbaseclasses; + } + + /* Copy the saved-up fields into the field vector. Start from the head + of the list, adding to the tail of the field array, so that they end + up in the same order in the array in which they were added to the list. */ + while (nfields-- > 0) + { + TYPE_FIELD (type, nfields) = fip->fields->field; + switch (fip->fields->accessibility) + { + case DW_ACCESS_private: + SET_TYPE_FIELD_PRIVATE (type, nfields); + break; + + case DW_ACCESS_protected: + SET_TYPE_FIELD_PROTECTED (type, nfields); + break; + + case DW_ACCESS_public: + break; + + default: + /* Unknown accessibility. Complain and treat it as public. */ + { + complain (&dwarf2_unsupported_accessibility, + fip->fields->accessibility); + } + break; + } + if (nfields < fip->nbaseclasses) + { + switch (fip->fields->virtuality) + { + case DW_VIRTUALITY_virtual: + case DW_VIRTUALITY_pure_virtual: + SET_TYPE_FIELD_VIRTUAL (type, nfields); + break; + } + } + fip->fields = fip->fields->next; + } +} + +/* Add a member function to the proper fieldlist. */ + +static void +dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, + struct type *type, struct objfile *objfile, + const struct comp_unit_head *cu_header) +{ + struct attribute *attr; + struct fnfieldlist *flp; + int i; + struct fn_field *fnp; + char *fieldname; + char *physname; + struct nextfnfield *new_fnfield; + + /* Get name of member function. */ + attr = dwarf_attr (die, DW_AT_name); + if (attr && DW_STRING (attr)) + fieldname = DW_STRING (attr); + else + return; + + /* Get the mangled name. */ + physname = dwarf2_linkage_name (die); + + /* Look up member function name in fieldlist. */ + for (i = 0; i < fip->nfnfields; i++) + { + if (STREQ (fip->fnfieldlists[i].name, fieldname)) + break; + } + + /* Create new list element if necessary. */ + if (i < fip->nfnfields) + flp = &fip->fnfieldlists[i]; + else + { + if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) + { + fip->fnfieldlists = (struct fnfieldlist *) + xrealloc (fip->fnfieldlists, + (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) + * sizeof (struct fnfieldlist)); + if (fip->nfnfields == 0) + make_cleanup (free_current_contents, &fip->fnfieldlists); + } + flp = &fip->fnfieldlists[fip->nfnfields]; + flp->name = fieldname; + flp->length = 0; + flp->head = NULL; + fip->nfnfields++; + } + + /* Create a new member function field and chain it to the field list + entry. */ + new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield)); + make_cleanup (xfree, new_fnfield); + memset (new_fnfield, 0, sizeof (struct nextfnfield)); + new_fnfield->next = flp->head; + flp->head = new_fnfield; + flp->length++; + + /* Fill in the member function field info. */ + fnp = &new_fnfield->fnfield; + fnp->physname = obsavestring (physname, strlen (physname), + &objfile->type_obstack); + fnp->type = alloc_type (objfile); + if (die->type && TYPE_CODE (die->type) == TYPE_CODE_FUNC) + { + struct type *return_type = TYPE_TARGET_TYPE (die->type); + int nparams = TYPE_NFIELDS (die->type); + + /* TYPE is the domain of this method, and DIE->TYPE is the type + of the method itself (TYPE_CODE_METHOD). */ + smash_to_method_type (fnp->type, type, + TYPE_TARGET_TYPE (die->type), + TYPE_FIELDS (die->type), + TYPE_NFIELDS (die->type), + TYPE_VARARGS (die->type)); + + /* Handle static member functions. + Dwarf2 has no clean way to discern C++ static and non-static + member functions. G++ helps GDB by marking the first + parameter for non-static member functions (which is the + this pointer) as artificial. We obtain this information + from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ + if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (die->type, 0) == 0) + fnp->voffset = VOFFSET_STATIC; + } + else + complain (&dwarf2_missing_member_fn_type_complaint, physname); + + /* Get fcontext from DW_AT_containing_type if present. */ + if (dwarf_attr (die, DW_AT_containing_type) != NULL) + fnp->fcontext = die_containing_type (die, objfile, cu_header); + + /* dwarf2 doesn't have stubbed physical names, so the setting of is_const + and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ + + /* Get accessibility. */ + attr = dwarf_attr (die, DW_AT_accessibility); + if (attr) + { + switch (DW_UNSND (attr)) + { + case DW_ACCESS_private: + fnp->is_private = 1; + break; + case DW_ACCESS_protected: + fnp->is_protected = 1; + break; + } + } + + /* Check for artificial methods. */ + attr = dwarf_attr (die, DW_AT_artificial); + if (attr && DW_UNSND (attr) != 0) + fnp->is_artificial = 1; + + /* Get index in virtual function table if it is a virtual member function. */ + attr = dwarf_attr (die, DW_AT_vtable_elem_location); + if (attr) + { + /* Support the .debug_loc offsets */ + if (attr_form_is_block (attr)) + { + fnp->voffset = decode_locdesc (DW_BLOCK (attr), objfile, cu_header) + 2; + } + else if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8) + { + complain (&dwarf2_complex_location_expr); + } + else + { + complain (&dwarf2_invalid_attrib_class, "DW_AT_vtable_elem_location", + fieldname); + } + } +} + +/* Create the vector of member function fields, and attach it to the type. */ + +static void +dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, + struct objfile *objfile) +{ + struct fnfieldlist *flp; + int total_length = 0; + int i; + + ALLOCATE_CPLUS_STRUCT_TYPE (type); + TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) + TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); + + for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) + { + struct nextfnfield *nfp = flp->head; + struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); + int k; + + TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; + TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; + fn_flp->fn_fields = (struct fn_field *) + TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); + for (k = flp->length; (k--, nfp); nfp = nfp->next) + fn_flp->fn_fields[k] = nfp->fnfield; + + total_length += flp->length; + } + + TYPE_NFN_FIELDS (type) = fip->nfnfields; + TYPE_NFN_FIELDS_TOTAL (type) = total_length; +} + +/* Called when we find the DIE that starts a structure or union scope + (definition) to process all dies that define the members of the + structure or union. + + NOTE: we need to call struct_type regardless of whether or not the + DIE has an at_name attribute, since it might be an anonymous + structure or union. This gets the type entered into our set of + user defined types. + + However, if the structure is incomplete (an opaque struct/union) + then suppress creating a symbol table entry for it since gdb only + wants to find the one with the complete definition. Note that if + it is complete, we just call new_symbol, which does it's own + checking about whether the struct/union is anonymous or not (and + suppresses creating a symbol table entry itself). */ + +static void +read_structure_scope (struct die_info *die, struct objfile *objfile, + const struct comp_unit_head *cu_header) +{ + struct type *type; + struct attribute *attr; + + type = alloc_type (objfile); + + INIT_CPLUS_SPECIFIC (type); + attr = dwarf_attr (die, DW_AT_name); + if (attr && DW_STRING (attr)) + { + TYPE_TAG_NAME (type) = obsavestring (DW_STRING (attr), + strlen (DW_STRING (attr)), + &objfile->type_obstack); + } + + if (die->tag == DW_TAG_structure_type) + { + TYPE_CODE (type) = TYPE_CODE_STRUCT; + } + else if (die->tag == DW_TAG_union_type) + { + TYPE_CODE (type) = TYPE_CODE_UNION; + } + else + { + /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT + in gdbtypes.h. */ + TYPE_CODE (type) = TYPE_CODE_CLASS; + } + + attr = dwarf_attr (die, DW_AT_byte_size); + if (attr) + { + TYPE_LENGTH (type) = DW_UNSND (attr); + } + else + { + TYPE_LENGTH (type) = 0; + } + + /* We need to add the type field to the die immediately so we don't + infinitely recurse when dealing with pointers to the structure + type within the structure itself. */ + die->type = type; + + if (die->has_children && ! die_is_declaration (die)) + { + struct field_info fi; + struct die_info *child_die; + struct cleanup *back_to = make_cleanup (null_cleanup, NULL); + + memset (&fi, 0, sizeof (struct field_info)); + + child_die = die->next; + + while (child_die && child_die->tag) + { + if (child_die->tag == DW_TAG_member) + { + dwarf2_add_field (&fi, child_die, objfile, cu_header); + } + else if (child_die->tag == DW_TAG_variable) + { + /* C++ static member. */ + dwarf2_add_field (&fi, child_die, objfile, cu_header); + } + else if (child_die->tag == DW_TAG_subprogram) + { + /* C++ member function. */ + process_die (child_die, objfile, cu_header); + dwarf2_add_member_fn (&fi, child_die, type, objfile, cu_header); + } + else if (child_die->tag == DW_TAG_inheritance) + { + /* C++ base class field. */ + dwarf2_add_field (&fi, child_die, objfile, cu_header); + } + else + { + process_die (child_die, objfile, cu_header); + } + child_die = sibling_die (child_die); + } + + /* Attach fields and member functions to the type. */ + if (fi.nfields) + dwarf2_attach_fields_to_type (&fi, type, objfile); + if (fi.nfnfields) + { + dwarf2_attach_fn_fields_to_type (&fi, type, objfile); + + /* Get the type which refers to the base class (possibly this + class itself) which contains the vtable pointer for the current + class from the DW_AT_containing_type attribute. */ + + if (dwarf_attr (die, DW_AT_containing_type) != NULL) + { + struct type *t = die_containing_type (die, objfile, cu_header); + + TYPE_VPTR_BASETYPE (type) = t; + if (type == t) + { + static const char vptr_name[] = + {'_', 'v', 'p', 't', 'r', '\0'}; + int i; + + /* Our own class provides vtbl ptr. */ + for (i = TYPE_NFIELDS (t) - 1; + i >= TYPE_N_BASECLASSES (t); + --i) + { + char *fieldname = TYPE_FIELD_NAME (t, i); + + if (STREQN (fieldname, vptr_name, strlen (vptr_name) - 1) + && is_cplus_marker (fieldname[strlen (vptr_name)])) + { + TYPE_VPTR_FIELDNO (type) = i; + break; + } + } + + /* Complain if virtual function table field not found. */ + if (i < TYPE_N_BASECLASSES (t)) + complain (&dwarf2_vtbl_not_found_complaint, + TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : ""); + } + else + { + TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t); + } + } + } + + new_symbol (die, type, objfile, cu_header); + + do_cleanups (back_to); + } + else + { + /* No children, must be stub. */ + TYPE_FLAGS (type) |= TYPE_FLAG_STUB; + } +} + +/* Given a pointer to a die which begins an enumeration, process all + the dies that define the members of the enumeration. + + This will be much nicer in draft 6 of the DWARF spec when our + members will be dies instead squished into the DW_AT_element_list + attribute. + + NOTE: We reverse the order of the element list. */ + +static void +read_enumeration (struct die_info *die, struct objfile *objfile, + const struct comp_unit_head *cu_header) +{ + struct die_info *child_die; + struct type *type; + struct field *fields; + struct attribute *attr; + struct symbol *sym; + int num_fields; + int unsigned_enum = 1; + + type = alloc_type (objfile); + + TYPE_CODE (type) = TYPE_CODE_ENUM; + attr = dwarf_attr (die, DW_AT_name); + if (attr && DW_STRING (attr)) + { + TYPE_TAG_NAME (type) = obsavestring (DW_STRING (attr), + strlen (DW_STRING (attr)), + &objfile->type_obstack); + } + + attr = dwarf_attr (die, DW_AT_byte_size); + if (attr) + { + TYPE_LENGTH (type) = DW_UNSND (attr); + } + else + { + TYPE_LENGTH (type) = 0; + } + + num_fields = 0; + fields = NULL; + if (die->has_children) + { + child_die = die->next; + while (child_die && child_die->tag) + { + if (child_die->tag != DW_TAG_enumerator) + { + process_die (child_die, objfile, cu_header); + } + else + { + attr = dwarf_attr (child_die, DW_AT_name); + if (attr) + { + sym = new_symbol (child_die, type, objfile, cu_header); + if (SYMBOL_VALUE (sym) < 0) + unsigned_enum = 0; + + if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) + { + fields = (struct field *) + xrealloc (fields, + (num_fields + DW_FIELD_ALLOC_CHUNK) + * sizeof (struct field)); + } + + FIELD_NAME (fields[num_fields]) = SYMBOL_NAME (sym); + FIELD_TYPE (fields[num_fields]) = NULL; + FIELD_BITPOS (fields[num_fields]) = SYMBOL_VALUE (sym); + FIELD_BITSIZE (fields[num_fields]) = 0; + + num_fields++; + } + } + + child_die = sibling_die (child_die); + } + + if (num_fields) + { + TYPE_NFIELDS (type) = num_fields; + TYPE_FIELDS (type) = (struct field *) + TYPE_ALLOC (type, sizeof (struct field) * num_fields); + memcpy (TYPE_FIELDS (type), fields, + sizeof (struct field) * num_fields); + xfree (fields); + } + if (unsigned_enum) + TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED; + } + die->type = type; + new_symbol (die, type, objfile, cu_header); +} + +/* Extract all information from a DW_TAG_array_type DIE and put it in + the DIE's type field. For now, this only handles one dimensional + arrays. */ + +static void +read_array_type (struct die_info *die, struct objfile *objfile, + const struct comp_unit_head *cu_header) +{ + struct die_info *child_die; + struct type *type = NULL; + struct type *element_type, *range_type, *index_type; + struct type **range_types = NULL; + struct attribute *attr; + int ndim = 0; + struct cleanup *back_to; + + /* Return if we've already decoded this type. */ + if (die->type) + { + return; + } + + element_type = die_type (die, objfile, cu_header); + + /* Irix 6.2 native cc creates array types without children for + arrays with unspecified length. */ + if (die->has_children == 0) + { + index_type = dwarf2_fundamental_type (objfile, FT_INTEGER); + range_type = create_range_type (NULL, index_type, 0, -1); + die->type = create_array_type (NULL, element_type, range_type); + return; + } + + back_to = make_cleanup (null_cleanup, NULL); + child_die = die->next; + while (child_die && child_die->tag) + { + if (child_die->tag == DW_TAG_subrange_type) + { + unsigned int low, high; + + /* Default bounds to an array with unspecified length. */ + low = 0; + high = -1; + if (cu_language == language_fortran) + { + /* FORTRAN implies a lower bound of 1, if not given. */ + low = 1; + } + + index_type = die_type (child_die, objfile, cu_header); + attr = dwarf_attr (child_die, DW_AT_lower_bound); + if (attr) + { + if (attr->form == DW_FORM_sdata) + { + low = DW_SND (attr); + } + else if (attr->form == DW_FORM_udata + || attr->form == DW_FORM_data1 + || attr->form == DW_FORM_data2 + || attr->form == DW_FORM_data4 + || attr->form == DW_FORM_data8) + { + low = DW_UNSND (attr); + } + else + { + complain (&dwarf2_non_const_array_bound_ignored, + dwarf_form_name (attr->form)); +#ifdef FORTRAN_HACK + die->type = lookup_pointer_type (element_type); + return; +#else + low = 0; +#endif + } + } + attr = dwarf_attr (child_die, DW_AT_upper_bound); + if (attr) + { + if (attr->form == DW_FORM_sdata) + { + high = DW_SND (attr); + } + else if (attr->form == DW_FORM_udata + || attr->form == DW_FORM_data1 + || attr->form == DW_FORM_data2 + || attr->form == DW_FORM_data4 + || attr->form == DW_FORM_data8) + { + high = DW_UNSND (attr); + } + else if (attr->form == DW_FORM_block1) + { + /* GCC encodes arrays with unspecified or dynamic length + with a DW_FORM_block1 attribute. + FIXME: GDB does not yet know how to handle dynamic + arrays properly, treat them as arrays with unspecified + length for now. */ + high = -1; + } + else + { + complain (&dwarf2_non_const_array_bound_ignored, + dwarf_form_name (attr->form)); +#ifdef FORTRAN_HACK + die->type = lookup_pointer_type (element_type); + return; +#else + high = 1; +#endif + } + } + + /* Create a range type and save it for array type creation. */ + if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0) + { + range_types = (struct type **) + xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK) + * sizeof (struct type *)); + if (ndim == 0) + make_cleanup (free_current_contents, &range_types); + } + range_types[ndim++] = create_range_type (NULL, index_type, low, high); + } + child_die = sibling_die (child_die); + } + + /* Dwarf2 dimensions are output from left to right, create the + necessary array types in backwards order. */ + type = element_type; + while (ndim-- > 0) + type = create_array_type (NULL, type, range_types[ndim]); + + /* Understand Dwarf2 support for vector types (like they occur on + the PowerPC w/ AltiVec). Gcc just adds another attribute to the + array type. This is not part of the Dwarf2/3 standard yet, but a + custom vendor extension. The main difference between a regular + array and the vector variant is that vectors are passed by value + to functions. */ + attr = dwarf_attr (die, DW_AT_GNU_vector); + if (attr) + TYPE_FLAGS (type) |= TYPE_FLAG_VECTOR; + + do_cleanups (back_to); + + /* Install the type in the die. */ + die->type = type; +} + +/* First cut: install each common block member as a global variable. */ + +static void +read_common_block (struct die_info *die, struct objfile *objfile, + const struct comp_unit_head *cu_header) +{ + struct die_info *child_die; + struct attribute *attr; + struct symbol *sym; + CORE_ADDR base = (CORE_ADDR) 0; + + attr = dwarf_attr (die, DW_AT_location); + if (attr) + { + /* Support the .debug_loc offsets */ + if (attr_form_is_block (attr)) + { + base = decode_locdesc (DW_BLOCK (attr), objfile, cu_header); + } + else if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8) + { + complain (&dwarf2_complex_location_expr); + } + else + { + complain (&dwarf2_invalid_attrib_class, "DW_AT_location", + "common block member"); + } + } + if (die->has_children) + { + child_die = die->next; + while (child_die && child_die->tag) + { + sym = new_symbol (child_die, NULL, objfile, cu_header); + attr = dwarf_attr (child_die, DW_AT_data_member_location); + if (attr) + { + SYMBOL_VALUE_ADDRESS (sym) = + base + decode_locdesc (DW_BLOCK (attr), objfile, cu_header); + add_symbol_to_list (sym, &global_symbols); + } + child_die = sibling_die (child_die); + } + } +} + +/* Extract all information from a DW_TAG_pointer_type DIE and add to + the user defined type vector. */ + +static void +read_tag_pointer_type (struct die_info *die, struct objfile *objfile, + const struct comp_unit_head *cu_header) +{ + struct type *type; + struct attribute *attr; + + if (die->type) + { + return; + } + + type = lookup_pointer_type (die_type (die, objfile, cu_header)); + attr = dwarf_attr (die, DW_AT_byte_size); + if (attr) + { + TYPE_LENGTH (type) = DW_UNSND (attr); + } + else + { + TYPE_LENGTH (type) = cu_header->addr_size; + } + die->type = type; +} + +/* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to + the user defined type vector. */ + +static void +read_tag_ptr_to_member_type (struct die_info *die, struct objfile *objfile, + const struct comp_unit_head *cu_header) +{ + struct type *type; + struct type *to_type; + struct type *domain; + + if (die->type) + { + return; + } + + type = alloc_type (objfile); + to_type = die_type (die, objfile, cu_header); + domain = die_containing_type (die, objfile, cu_header); + smash_to_member_type (type, domain, to_type); + + die->type = type; +} + +/* Extract all information from a DW_TAG_reference_type DIE and add to + the user defined type vector. */ + +static void +read_tag_reference_type (struct die_info *die, struct objfile *objfile, + const struct comp_unit_head *cu_header) +{ + struct type *type; + struct attribute *attr; + + if (die->type) + { + return; + } + + type = lookup_reference_type (die_type (die, objfile, cu_header)); + attr = dwarf_attr (die, DW_AT_byte_size); + if (attr) + { + TYPE_LENGTH (type) = DW_UNSND (attr); + } + else + { + TYPE_LENGTH (type) = cu_header->addr_size; + } + die->type = type; +} + +static void +read_tag_const_type (struct die_info *die, struct objfile *objfile, + const struct comp_unit_head *cu_header) +{ + struct type *base_type; + + if (die->type) + { + return; + } + + base_type = die_type (die, objfile, cu_header); + die->type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); +} + +static void +read_tag_volatile_type (struct die_info *die, struct objfile *objfile, + const struct comp_unit_head *cu_header) +{ + struct type *base_type; + + if (die->type) + { + return; + } + + base_type = die_type (die, objfile, cu_header); + die->type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); +} + +/* Extract all information from a DW_TAG_string_type DIE and add to + the user defined type vector. It isn't really a user defined type, + but it behaves like one, with other DIE's using an AT_user_def_type + attribute to reference it. */ + +static void +read_tag_string_type (struct die_info *die, struct objfile *objfile) +{ + struct type *type, *range_type, *index_type, *char_type; + struct attribute *attr; + unsigned int length; + + if (die->type) + { + return; + } + + attr = dwarf_attr (die, DW_AT_string_length); + if (attr) + { + length = DW_UNSND (attr); + } + else + { + /* check for the DW_AT_byte_size attribute */ + attr = dwarf_attr (die, DW_AT_byte_size); + if (attr) + { + length = DW_UNSND (attr); + } + else + { + length = 1; + } + } + index_type = dwarf2_fundamental_type (objfile, FT_INTEGER); + range_type = create_range_type (NULL, index_type, 1, length); + if (cu_language == language_fortran) + { + /* Need to create a unique string type for bounds + information */ + type = create_string_type (0, range_type); + } + else + { + char_type = dwarf2_fundamental_type (objfile, FT_CHAR); + type = create_string_type (char_type, range_type); + } + die->type = type; +} + +/* Handle DIES due to C code like: + + struct foo + { + int (*funcp)(int a, long l); + int b; + }; + + ('funcp' generates a DW_TAG_subroutine_type DIE) + */ + +static void +read_subroutine_type (struct die_info *die, struct objfile *objfile, + const struct comp_unit_head *cu_header) +{ + struct type *type; /* Type that this function returns */ + struct type *ftype; /* Function that returns above type */ + struct attribute *attr; + + /* Decode the type that this subroutine returns */ + if (die->type) + { + return; + } + type = die_type (die, objfile, cu_header); + ftype = lookup_function_type (type); + + /* All functions in C++ have prototypes. */ + attr = dwarf_attr (die, DW_AT_prototyped); + if ((attr && (DW_UNSND (attr) != 0)) + || cu_language == language_cplus) + TYPE_FLAGS (ftype) |= TYPE_FLAG_PROTOTYPED; + + if (die->has_children) + { + struct die_info *child_die; + int nparams = 0; + int iparams = 0; + + /* Count the number of parameters. + FIXME: GDB currently ignores vararg functions, but knows about + vararg member functions. */ + child_die = die->next; + while (child_die && child_die->tag) + { + if (child_die->tag == DW_TAG_formal_parameter) + nparams++; + else if (child_die->tag == DW_TAG_unspecified_parameters) + TYPE_FLAGS (ftype) |= TYPE_FLAG_VARARGS; + child_die = sibling_die (child_die); + } + + /* Allocate storage for parameters and fill them in. */ + TYPE_NFIELDS (ftype) = nparams; + TYPE_FIELDS (ftype) = (struct field *) + TYPE_ALLOC (ftype, nparams * sizeof (struct field)); + + child_die = die->next; + while (child_die && child_die->tag) + { + if (child_die->tag == DW_TAG_formal_parameter) + { + /* Dwarf2 has no clean way to discern C++ static and non-static + member functions. G++ helps GDB by marking the first + parameter for non-static member functions (which is the + this pointer) as artificial. We pass this information + to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */ + attr = dwarf_attr (child_die, DW_AT_artificial); + if (attr) + TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); + else + TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; + TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, objfile, + cu_header); + iparams++; + } + child_die = sibling_die (child_die); + } + } + + die->type = ftype; +} + +static void +read_typedef (struct die_info *die, struct objfile *objfile, + const struct comp_unit_head *cu_header) +{ + struct attribute *attr; + char *name = NULL; + + if (!die->type) + { + attr = dwarf_attr (die, DW_AT_name); + if (attr && DW_STRING (attr)) + { + name = DW_STRING (attr); + } + die->type = init_type (TYPE_CODE_TYPEDEF, 0, TYPE_FLAG_TARGET_STUB, name, objfile); + TYPE_TARGET_TYPE (die->type) = die_type (die, objfile, cu_header); + } +} + +/* Find a representation of a given base type and install + it in the TYPE field of the die. */ + +static void +read_base_type (struct die_info *die, struct objfile *objfile) +{ + struct type *type; + struct attribute *attr; + int encoding = 0, size = 0; + + /* If we've already decoded this die, this is a no-op. */ + if (die->type) + { + return; + } + + attr = dwarf_attr (die, DW_AT_encoding); + if (attr) + { + encoding = DW_UNSND (attr); + } + attr = dwarf_attr (die, DW_AT_byte_size); + if (attr) + { + size = DW_UNSND (attr); + } + attr = dwarf_attr (die, DW_AT_name); + if (attr && DW_STRING (attr)) + { + enum type_code code = TYPE_CODE_INT; + int type_flags = 0; + + switch (encoding) + { + case DW_ATE_address: + /* Turn DW_ATE_address into a void * pointer. */ + code = TYPE_CODE_PTR; + type_flags |= TYPE_FLAG_UNSIGNED; + break; + case DW_ATE_boolean: + code = TYPE_CODE_BOOL; + type_flags |= TYPE_FLAG_UNSIGNED; + break; + case DW_ATE_complex_float: + code = TYPE_CODE_COMPLEX; + break; + case DW_ATE_float: + code = TYPE_CODE_FLT; + break; + case DW_ATE_signed: + case DW_ATE_signed_char: + break; + case DW_ATE_unsigned: + case DW_ATE_unsigned_char: + type_flags |= TYPE_FLAG_UNSIGNED; + break; + default: + complain (&dwarf2_unsupported_at_encoding, + dwarf_type_encoding_name (encoding)); + break; + } + type = init_type (code, size, type_flags, DW_STRING (attr), objfile); + if (encoding == DW_ATE_address) + TYPE_TARGET_TYPE (type) = dwarf2_fundamental_type (objfile, FT_VOID); + else if (encoding == DW_ATE_complex_float) + { + if (size == 32) + TYPE_TARGET_TYPE (type) + = dwarf2_fundamental_type (objfile, FT_EXT_PREC_FLOAT); + else if (size == 16) + TYPE_TARGET_TYPE (type) + = dwarf2_fundamental_type (objfile, FT_DBL_PREC_FLOAT); + else if (size == 8) + TYPE_TARGET_TYPE (type) + = dwarf2_fundamental_type (objfile, FT_FLOAT); + } + } + else + { + type = dwarf_base_type (encoding, size, objfile); + } + die->type = type; +} + +/* Read a whole compilation unit into a linked list of dies. */ + +static struct die_info * +read_comp_unit (char *info_ptr, bfd *abfd, + const struct comp_unit_head *cu_header) +{ + struct die_info *first_die, *last_die, *die; + char *cur_ptr; + int nesting_level; + + /* Reset die reference table; we are + building new ones now. */ + dwarf2_empty_hash_tables (); + + cur_ptr = info_ptr; + nesting_level = 0; + first_die = last_die = NULL; + do + { + cur_ptr = read_full_die (&die, abfd, cur_ptr, cu_header); + if (die->has_children) + { + nesting_level++; + } + if (die->tag == 0) + { + nesting_level--; + } + + die->next = NULL; + + /* Enter die in reference hash table */ + store_in_ref_table (die->offset, die); + + if (!first_die) + { + first_die = last_die = die; + } + else + { + last_die->next = die; + last_die = die; + } + } + while (nesting_level > 0); + return first_die; +} + +/* Free a linked list of dies. */ + +static void +free_die_list (struct die_info *dies) +{ + struct die_info *die, *next; + + die = dies; + while (die) + { + next = die->next; + xfree (die->attrs); + xfree (die); + die = next; + } +} + +static void +do_free_die_list_cleanup (void *dies) +{ + free_die_list (dies); +} + +static struct cleanup * +make_cleanup_free_die_list (struct die_info *dies) +{ + return make_cleanup (do_free_die_list_cleanup, dies); +} + + +/* Read the contents of the section at OFFSET and of size SIZE from the + object file specified by OBJFILE into the psymbol_obstack and return it. */ + +char * +dwarf2_read_section (struct objfile *objfile, file_ptr offset, + unsigned int size) +{ + bfd *abfd = objfile->obfd; + char *buf; + + if (size == 0) + return NULL; + + buf = (char *) obstack_alloc (&objfile->psymbol_obstack, size); + if ((bfd_seek (abfd, offset, SEEK_SET) != 0) || + (bfd_bread (buf, size, abfd) != size)) + { + buf = NULL; + error ("Dwarf Error: Can't read DWARF data from '%s'", + bfd_get_filename (abfd)); + } + return buf; +} + +/* In DWARF version 2, the description of the debugging information is + stored in a separate .debug_abbrev section. Before we read any + dies from a section we read in all abbreviations and install them + in a hash table. */ + +static void +dwarf2_read_abbrevs (bfd *abfd, unsigned int offset) +{ + char *abbrev_ptr; + struct abbrev_info *cur_abbrev; + unsigned int abbrev_number, bytes_read, abbrev_name; + unsigned int abbrev_form, hash_number; + + /* empty the table */ + dwarf2_empty_abbrev_table (NULL); + + abbrev_ptr = dwarf_abbrev_buffer + offset; + abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); + abbrev_ptr += bytes_read; + + /* loop until we reach an abbrev number of 0 */ + while (abbrev_number) + { + cur_abbrev = dwarf_alloc_abbrev (); + + /* read in abbrev header */ + cur_abbrev->number = abbrev_number; + cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); + abbrev_ptr += bytes_read; + cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); + abbrev_ptr += 1; + + /* now read in declarations */ + abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); + abbrev_ptr += bytes_read; + abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); + abbrev_ptr += bytes_read; + while (abbrev_name) + { + if ((cur_abbrev->num_attrs % ATTR_ALLOC_CHUNK) == 0) + { + cur_abbrev->attrs = (struct attr_abbrev *) + xrealloc (cur_abbrev->attrs, + (cur_abbrev->num_attrs + ATTR_ALLOC_CHUNK) + * sizeof (struct attr_abbrev)); + } + cur_abbrev->attrs[cur_abbrev->num_attrs].name = abbrev_name; + cur_abbrev->attrs[cur_abbrev->num_attrs++].form = abbrev_form; + abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); + abbrev_ptr += bytes_read; + abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); + abbrev_ptr += bytes_read; + } + + hash_number = abbrev_number % ABBREV_HASH_SIZE; + cur_abbrev->next = dwarf2_abbrevs[hash_number]; + dwarf2_abbrevs[hash_number] = cur_abbrev; + + /* Get next abbreviation. + Under Irix6 the abbreviations for a compilation unit are not + always properly terminated with an abbrev number of 0. + Exit loop if we encounter an abbreviation which we have + already read (which means we are about to read the abbreviations + for the next compile unit) or if the end of the abbreviation + table is reached. */ + if ((unsigned int) (abbrev_ptr - dwarf_abbrev_buffer) + >= dwarf_abbrev_size) + break; + abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); + abbrev_ptr += bytes_read; + if (dwarf2_lookup_abbrev (abbrev_number) != NULL) + break; + } +} + +/* Empty the abbrev table for a new compilation unit. */ + +/* ARGSUSED */ +static void +dwarf2_empty_abbrev_table (PTR ignore) +{ + int i; + struct abbrev_info *abbrev, *next; + + for (i = 0; i < ABBREV_HASH_SIZE; ++i) + { + next = NULL; + abbrev = dwarf2_abbrevs[i]; + while (abbrev) + { + next = abbrev->next; + xfree (abbrev->attrs); + xfree (abbrev); + abbrev = next; + } + dwarf2_abbrevs[i] = NULL; + } +} + +/* Lookup an abbrev_info structure in the abbrev hash table. */ + +static struct abbrev_info * +dwarf2_lookup_abbrev (unsigned int number) +{ + unsigned int hash_number; + struct abbrev_info *abbrev; + + hash_number = number % ABBREV_HASH_SIZE; + abbrev = dwarf2_abbrevs[hash_number]; + + while (abbrev) + { + if (abbrev->number == number) + return abbrev; + else + abbrev = abbrev->next; + } + return NULL; +} + +/* Read a minimal amount of information into the minimal die structure. */ + +static char * +read_partial_die (struct partial_die_info *part_die, bfd *abfd, + char *info_ptr, const struct comp_unit_head *cu_header) +{ + unsigned int abbrev_number, bytes_read, i; + struct abbrev_info *abbrev; + struct attribute attr; + struct attribute spec_attr; + int found_spec_attr = 0; + int has_low_pc_attr = 0; + int has_high_pc_attr = 0; + + *part_die = zeroed_partial_die; + abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); + info_ptr += bytes_read; + if (!abbrev_number) + return info_ptr; + + abbrev = dwarf2_lookup_abbrev (abbrev_number); + if (!abbrev) + { + error ("Dwarf Error: Could not find abbrev number %d.", abbrev_number); + } + part_die->offset = info_ptr - dwarf_info_buffer; + part_die->tag = abbrev->tag; + part_die->has_children = abbrev->has_children; + part_die->abbrev = abbrev_number; + + for (i = 0; i < abbrev->num_attrs; ++i) + { + info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, + info_ptr, cu_header); + + /* Store the data if it is of an attribute we want to keep in a + partial symbol table. */ + switch (attr.name) + { + case DW_AT_name: + + /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */ + if (part_die->name == NULL) + part_die->name = DW_STRING (&attr); + break; + case DW_AT_MIPS_linkage_name: + part_die->name = DW_STRING (&attr); + break; + case DW_AT_low_pc: + has_low_pc_attr = 1; + part_die->lowpc = DW_ADDR (&attr); + break; + case DW_AT_high_pc: + has_high_pc_attr = 1; + part_die->highpc = DW_ADDR (&attr); + break; + case DW_AT_location: + /* Support the .debug_loc offsets */ + if (attr_form_is_block (&attr)) + { + part_die->locdesc = DW_BLOCK (&attr); + } + else if (attr.form == DW_FORM_data4 || attr.form == DW_FORM_data8) + { + complain (&dwarf2_complex_location_expr); + } + else + { + complain (&dwarf2_invalid_attrib_class, "DW_AT_location", + "partial symbol information"); + } + break; + case DW_AT_language: + part_die->language = DW_UNSND (&attr); + break; + case DW_AT_external: + part_die->is_external = DW_UNSND (&attr); + break; + case DW_AT_declaration: + part_die->is_declaration = DW_UNSND (&attr); + break; + case DW_AT_type: + part_die->has_type = 1; + break; + case DW_AT_abstract_origin: + case DW_AT_specification: + found_spec_attr = 1; + spec_attr = attr; + break; + case DW_AT_sibling: + /* Ignore absolute siblings, they might point outside of + the current compile unit. */ + if (attr.form == DW_FORM_ref_addr) + complain (&dwarf2_absolute_sibling_complaint); + else + part_die->sibling = + dwarf_info_buffer + dwarf2_get_ref_die_offset (&attr); + break; + default: + break; + } + } + + /* If we found a reference attribute and the die has no name, try + to find a name in the referred to die. */ + + if (found_spec_attr && part_die->name == NULL) + { + struct partial_die_info spec_die; + char *spec_ptr; + int dummy; + + spec_ptr = dwarf_info_buffer + dwarf2_get_ref_die_offset (&spec_attr); + read_partial_die (&spec_die, abfd, spec_ptr, cu_header); + if (spec_die.name) + { + part_die->name = spec_die.name; + + /* Copy DW_AT_external attribute if it is set. */ + if (spec_die.is_external) + part_die->is_external = spec_die.is_external; + } + } + + /* When using the GNU linker, .gnu.linkonce. sections are used to + eliminate duplicate copies of functions and vtables and such. + The linker will arbitrarily choose one and discard the others. + The AT_*_pc values for such functions refer to local labels in + these sections. If the section from that file was discarded, the + labels are not in the output, so the relocs get a value of 0. + If this is a discarded function, mark the pc bounds as invalid, + so that GDB will ignore it. */ + if (has_low_pc_attr && has_high_pc_attr + && part_die->lowpc < part_die->highpc + && (part_die->lowpc != 0 + || (bfd_get_file_flags (abfd) & HAS_RELOC))) + part_die->has_pc_info = 1; + return info_ptr; +} + +/* Read the die from the .debug_info section buffer. And set diep to + point to a newly allocated die with its information. */ + +static char * +read_full_die (struct die_info **diep, bfd *abfd, char *info_ptr, + const struct comp_unit_head *cu_header) +{ + unsigned int abbrev_number, bytes_read, i, offset; + struct abbrev_info *abbrev; + struct die_info *die; + + offset = info_ptr - dwarf_info_buffer; + abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); + info_ptr += bytes_read; + if (!abbrev_number) + { + die = dwarf_alloc_die (); + die->tag = 0; + die->abbrev = abbrev_number; + die->type = NULL; + *diep = die; + return info_ptr; + } + + abbrev = dwarf2_lookup_abbrev (abbrev_number); + if (!abbrev) + { + error ("Dwarf Error: could not find abbrev number %d.", abbrev_number); + } + die = dwarf_alloc_die (); + die->offset = offset; + die->tag = abbrev->tag; + die->has_children = abbrev->has_children; + die->abbrev = abbrev_number; + die->type = NULL; + + die->num_attrs = abbrev->num_attrs; + die->attrs = (struct attribute *) + xmalloc (die->num_attrs * sizeof (struct attribute)); + + for (i = 0; i < abbrev->num_attrs; ++i) + { + info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i], + abfd, info_ptr, cu_header); + } + + *diep = die; + return info_ptr; +} + +/* Read an attribute value described by an attribute form. */ + +static char * +read_attribute_value (struct attribute *attr, unsigned form, + bfd *abfd, char *info_ptr, + const struct comp_unit_head *cu_header) +{ + unsigned int bytes_read; + struct dwarf_block *blk; + + attr->form = form; + switch (form) + { + case DW_FORM_addr: + case DW_FORM_ref_addr: + DW_ADDR (attr) = read_address (abfd, info_ptr, cu_header, &bytes_read); + info_ptr += bytes_read; + break; + case DW_FORM_block2: + blk = dwarf_alloc_block (); + blk->size = read_2_bytes (abfd, info_ptr); + info_ptr += 2; + blk->data = read_n_bytes (abfd, info_ptr, blk->size); + info_ptr += blk->size; + DW_BLOCK (attr) = blk; + break; + case DW_FORM_block4: + blk = dwarf_alloc_block (); + blk->size = read_4_bytes (abfd, info_ptr); + info_ptr += 4; + blk->data = read_n_bytes (abfd, info_ptr, blk->size); + info_ptr += blk->size; + DW_BLOCK (attr) = blk; + break; + case DW_FORM_data2: + DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); + info_ptr += 2; + break; + case DW_FORM_data4: + DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); + info_ptr += 4; + break; + case DW_FORM_data8: + DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); + info_ptr += 8; + break; + case DW_FORM_string: + DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read); + info_ptr += bytes_read; + break; + case DW_FORM_strp: + DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header, + &bytes_read); + info_ptr += bytes_read; + break; + case DW_FORM_block: + blk = dwarf_alloc_block (); + blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); + info_ptr += bytes_read; + blk->data = read_n_bytes (abfd, info_ptr, blk->size); + info_ptr += blk->size; + DW_BLOCK (attr) = blk; + break; + case DW_FORM_block1: + blk = dwarf_alloc_block (); + blk->size = read_1_byte (abfd, info_ptr); + info_ptr += 1; + blk->data = read_n_bytes (abfd, info_ptr, blk->size); + info_ptr += blk->size; + DW_BLOCK (attr) = blk; + break; + case DW_FORM_data1: + DW_UNSND (attr) = read_1_byte (abfd, info_ptr); + info_ptr += 1; + break; + case DW_FORM_flag: + DW_UNSND (attr) = read_1_byte (abfd, info_ptr); + info_ptr += 1; + break; + case DW_FORM_sdata: + DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); + info_ptr += bytes_read; + break; + case DW_FORM_udata: + DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); + info_ptr += bytes_read; + break; + case DW_FORM_ref1: + DW_UNSND (attr) = read_1_byte (abfd, info_ptr); + info_ptr += 1; + break; + case DW_FORM_ref2: + DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); + info_ptr += 2; + break; + case DW_FORM_ref4: + DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); + info_ptr += 4; + break; + case DW_FORM_ref8: + DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); + info_ptr += 8; + break; + case DW_FORM_ref_udata: + DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); + info_ptr += bytes_read; + break; + case DW_FORM_indirect: + form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); + info_ptr += bytes_read; + info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu_header); + break; + default: + error ("Dwarf Error: Cannot handle %s in DWARF reader.", + dwarf_form_name (form)); + } + return info_ptr; +} + +/* Read an attribute described by an abbreviated attribute. */ + +static char * +read_attribute (struct attribute *attr, struct attr_abbrev *abbrev, + bfd *abfd, char *info_ptr, + const struct comp_unit_head *cu_header) +{ + attr->name = abbrev->name; + return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu_header); +} + +/* read dwarf information from a buffer */ + +static unsigned int +read_1_byte (bfd *abfd, char *buf) +{ + return bfd_get_8 (abfd, (bfd_byte *) buf); +} + +static int +read_1_signed_byte (bfd *abfd, char *buf) +{ + return bfd_get_signed_8 (abfd, (bfd_byte *) buf); +} + +static unsigned int +read_2_bytes (bfd *abfd, char *buf) +{ + return bfd_get_16 (abfd, (bfd_byte *) buf); +} + +static int +read_2_signed_bytes (bfd *abfd, char *buf) +{ + return bfd_get_signed_16 (abfd, (bfd_byte *) buf); +} + +static unsigned int +read_4_bytes (bfd *abfd, char *buf) +{ + return bfd_get_32 (abfd, (bfd_byte *) buf); +} + +static int +read_4_signed_bytes (bfd *abfd, char *buf) +{ + return bfd_get_signed_32 (abfd, (bfd_byte *) buf); +} + +static unsigned long +read_8_bytes (bfd *abfd, char *buf) +{ + return bfd_get_64 (abfd, (bfd_byte *) buf); +} + +static CORE_ADDR +read_address (bfd *abfd, char *buf, const struct comp_unit_head *cu_header, + int *bytes_read) +{ + CORE_ADDR retval = 0; + + if (cu_header->signed_addr_p) + { + switch (cu_header->addr_size) + { + case 2: + retval = bfd_get_signed_16 (abfd, (bfd_byte *) buf); + break; + case 4: + retval = bfd_get_signed_32 (abfd, (bfd_byte *) buf); + break; + case 8: + retval = bfd_get_signed_64 (abfd, (bfd_byte *) buf); + break; + default: + internal_error (__FILE__, __LINE__, + "read_address: bad switch, signed"); + } + } + else + { + switch (cu_header->addr_size) + { + case 2: + retval = bfd_get_16 (abfd, (bfd_byte *) buf); + break; + case 4: + retval = bfd_get_32 (abfd, (bfd_byte *) buf); + break; + case 8: + retval = bfd_get_64 (abfd, (bfd_byte *) buf); + break; + default: + internal_error (__FILE__, __LINE__, + "read_address: bad switch, unsigned"); + } + } + + *bytes_read = cu_header->addr_size; + return retval; +} + +/* Read the initial length from a section. The (draft) DWARF 3 + specification allows the initial length to take up either 4 bytes + or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 + bytes describe the length and all offsets will be 8 bytes in length + instead of 4. + + An older, non-standard 64-bit format is also handled by this + function. The older format in question stores the initial length + as an 8-byte quantity without an escape value. Lengths greater + than 2^32 aren't very common which means that the initial 4 bytes + is almost always zero. Since a length value of zero doesn't make + sense for the 32-bit format, this initial zero can be considered to + be an escape value which indicates the presence of the older 64-bit + format. As written, the code can't detect (old format) lengths + greater than 4GB. If it becomes necessary to handle lengths somewhat + larger than 4GB, we could allow other small values (such as the + non-sensical values of 1, 2, and 3) to also be used as escape values + indicating the presence of the old format. + + The value returned via bytes_read should be used to increment + the relevant pointer after calling read_initial_length(). + + As a side effect, this function sets the fields initial_length_size + and offset_size in cu_header to the values appropriate for the + length field. (The format of the initial length field determines + the width of file offsets to be fetched later with fetch_offset().) + + [ Note: read_initial_length() and read_offset() are based on the + document entitled "DWARF Debugging Information Format", revision + 3, draft 8, dated November 19, 2001. This document was obtained + from: + + http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf + + This document is only a draft and is subject to change. (So beware.) + + Details regarding the older, non-standard 64-bit format were + determined empirically by examining 64-bit ELF files produced + by the SGI toolchain on an IRIX 6.5 machine. + + - Kevin, July 16, 2002 + ] */ + +static LONGEST +read_initial_length (bfd *abfd, char *buf, struct comp_unit_head *cu_header, + int *bytes_read) +{ + LONGEST retval = 0; + + retval = bfd_get_32 (abfd, (bfd_byte *) buf); + + if (retval == 0xffffffff) + { + retval = bfd_get_64 (abfd, (bfd_byte *) buf + 4); + *bytes_read = 12; + if (cu_header != NULL) + { + cu_header->initial_length_size = 12; + cu_header->offset_size = 8; + } + } + else if (retval == 0) + { + /* Handle (non-standard) 64-bit DWARF2 formats such as that used + by IRIX. */ + retval = bfd_get_64 (abfd, (bfd_byte *) buf); + *bytes_read = 8; + if (cu_header != NULL) + { + cu_header->initial_length_size = 8; + cu_header->offset_size = 8; + } + } + else + { + *bytes_read = 4; + if (cu_header != NULL) + { + cu_header->initial_length_size = 4; + cu_header->offset_size = 4; + } + } + + return retval; +} + +/* Read an offset from the data stream. The size of the offset is + given by cu_header->offset_size. */ + +static LONGEST +read_offset (bfd *abfd, char *buf, const struct comp_unit_head *cu_header, + int *bytes_read) +{ + LONGEST retval = 0; + + switch (cu_header->offset_size) + { + case 4: + retval = bfd_get_32 (abfd, (bfd_byte *) buf); + *bytes_read = 4; + break; + case 8: + retval = bfd_get_64 (abfd, (bfd_byte *) buf); + *bytes_read = 8; + break; + default: + internal_error (__FILE__, __LINE__, + "read_offset: bad switch"); + } + + return retval; +} + +static char * +read_n_bytes (bfd *abfd, char *buf, unsigned int size) +{ + /* If the size of a host char is 8 bits, we can return a pointer + to the buffer, otherwise we have to copy the data to a buffer + allocated on the temporary obstack. */ + gdb_assert (HOST_CHAR_BIT == 8); + return buf; +} + +static char * +read_string (bfd *abfd, char *buf, unsigned int *bytes_read_ptr) +{ + /* If the size of a host char is 8 bits, we can return a pointer + to the string, otherwise we have to copy the string to a buffer + allocated on the temporary obstack. */ + gdb_assert (HOST_CHAR_BIT == 8); + if (*buf == '\0') + { + *bytes_read_ptr = 1; + return NULL; + } + *bytes_read_ptr = strlen (buf) + 1; + return buf; +} + +static char * +read_indirect_string (bfd *abfd, char *buf, + const struct comp_unit_head *cu_header, + unsigned int *bytes_read_ptr) +{ + LONGEST str_offset = read_offset (abfd, buf, cu_header, + (int *) bytes_read_ptr); + + if (dwarf_str_buffer == NULL) + { + error ("DW_FORM_strp used without .debug_str section"); + return NULL; + } + if (str_offset >= dwarf_str_size) + { + error ("DW_FORM_strp pointing outside of .debug_str section"); + return NULL; + } + gdb_assert (HOST_CHAR_BIT == 8); + if (dwarf_str_buffer[str_offset] == '\0') + return NULL; + return dwarf_str_buffer + str_offset; +} + +static unsigned long +read_unsigned_leb128 (bfd *abfd, char *buf, unsigned int *bytes_read_ptr) +{ + unsigned long result; + unsigned int num_read; + int i, shift; + unsigned char byte; + + result = 0; + shift = 0; + num_read = 0; + i = 0; + while (1) + { + byte = bfd_get_8 (abfd, (bfd_byte *) buf); + buf++; + num_read++; + result |= ((unsigned long)(byte & 127) << shift); + if ((byte & 128) == 0) + { + break; + } + shift += 7; + } + *bytes_read_ptr = num_read; + return result; +} + +static long +read_signed_leb128 (bfd *abfd, char *buf, unsigned int *bytes_read_ptr) +{ + long result; + int i, shift, size, num_read; + unsigned char byte; + + result = 0; + shift = 0; + size = 32; + num_read = 0; + i = 0; + while (1) + { + byte = bfd_get_8 (abfd, (bfd_byte *) buf); + buf++; + num_read++; + result |= ((long)(byte & 127) << shift); + shift += 7; + if ((byte & 128) == 0) + { + break; + } + } + if ((shift < size) && (byte & 0x40)) + { + result |= -(1 << shift); + } + *bytes_read_ptr = num_read; + return result; +} + +static void +set_cu_language (unsigned int lang) +{ + switch (lang) + { + case DW_LANG_C89: + case DW_LANG_C: + cu_language = language_c; + break; + case DW_LANG_C_plus_plus: + cu_language = language_cplus; + break; + case DW_LANG_Fortran77: + case DW_LANG_Fortran90: + case DW_LANG_Fortran95: + cu_language = language_fortran; + break; + case DW_LANG_Mips_Assembler: + cu_language = language_asm; + break; + case DW_LANG_Java: + cu_language = language_java; + break; + case DW_LANG_Ada83: + case DW_LANG_Ada95: + case DW_LANG_Cobol74: + case DW_LANG_Cobol85: + case DW_LANG_Pascal83: + case DW_LANG_Modula2: + default: + cu_language = language_unknown; + break; + } + cu_language_defn = language_def (cu_language); +} + +/* Return the named attribute or NULL if not there. */ + +static struct attribute * +dwarf_attr (struct die_info *die, unsigned int name) +{ + unsigned int i; + struct attribute *spec = NULL; + + for (i = 0; i < die->num_attrs; ++i) + { + if (die->attrs[i].name == name) + { + return &die->attrs[i]; + } + if (die->attrs[i].name == DW_AT_specification + || die->attrs[i].name == DW_AT_abstract_origin) + spec = &die->attrs[i]; + } + if (spec) + { + struct die_info *ref_die = + follow_die_ref (dwarf2_get_ref_die_offset (spec)); + + if (ref_die) + return dwarf_attr (ref_die, name); + } + + return NULL; +} + +static int +die_is_declaration (struct die_info *die) +{ + return (dwarf_attr (die, DW_AT_declaration) + && ! dwarf_attr (die, DW_AT_specification)); +} + + +/* Free the line_header structure *LH, and any arrays and strings it + refers to. */ +static void +free_line_header (struct line_header *lh) +{ + if (lh->standard_opcode_lengths) + xfree (lh->standard_opcode_lengths); + + /* Remember that all the lh->file_names[i].name pointers are + pointers into debug_line_buffer, and don't need to be freed. */ + if (lh->file_names) + xfree (lh->file_names); + + /* Similarly for the include directory names. */ + if (lh->include_dirs) + xfree (lh->include_dirs); + + xfree (lh); +} + + +/* Add an entry to LH's include directory table. */ +static void +add_include_dir (struct line_header *lh, char *include_dir) +{ + /* Grow the array if necessary. */ + if (lh->include_dirs_size == 0) + { + lh->include_dirs_size = 1; /* for testing */ + lh->include_dirs = xmalloc (lh->include_dirs_size + * sizeof (*lh->include_dirs)); + } + else if (lh->num_include_dirs >= lh->include_dirs_size) + { + lh->include_dirs_size *= 2; + lh->include_dirs = xrealloc (lh->include_dirs, + (lh->include_dirs_size + * sizeof (*lh->include_dirs))); + } + + lh->include_dirs[lh->num_include_dirs++] = include_dir; +} + + +/* Add an entry to LH's file name table. */ +static void +add_file_name (struct line_header *lh, + char *name, + unsigned int dir_index, + unsigned int mod_time, + unsigned int length) +{ + struct file_entry *fe; + + /* Grow the array if necessary. */ + if (lh->file_names_size == 0) + { + lh->file_names_size = 1; /* for testing */ + lh->file_names = xmalloc (lh->file_names_size + * sizeof (*lh->file_names)); + } + else if (lh->num_file_names >= lh->file_names_size) + { + lh->file_names_size *= 2; + lh->file_names = xrealloc (lh->file_names, + (lh->file_names_size + * sizeof (*lh->file_names))); + } + + fe = &lh->file_names[lh->num_file_names++]; + fe->name = name; + fe->dir_index = dir_index; + fe->mod_time = mod_time; + fe->length = length; +} + + +/* Read the statement program header starting at OFFSET in + dwarf_line_buffer, according to the endianness of ABFD. Return a + pointer to a struct line_header, allocated using xmalloc. + + NOTE: the strings in the include directory and file name tables of + the returned object point into debug_line_buffer, and must not be + freed. */ +static struct line_header * +dwarf_decode_line_header (unsigned int offset, bfd *abfd, + const struct comp_unit_head *cu_header) +{ + struct cleanup *back_to; + struct line_header *lh; + char *line_ptr; + int bytes_read; + int i; + char *cur_dir, *cur_file; + + if (dwarf_line_buffer == NULL) + { + complain (&dwarf2_missing_line_number_section); + return 0; + } + + /* Make sure that at least there's room for the total_length field. That + could be 12 bytes long, but we're just going to fudge that. */ + if (offset + 4 >= dwarf_line_size) + { + complain (&dwarf2_statement_list_fits_in_line_number_section); + return 0; + } + + lh = xmalloc (sizeof (*lh)); + memset (lh, 0, sizeof (*lh)); + back_to = make_cleanup ((make_cleanup_ftype *) free_line_header, + (void *) lh); + + line_ptr = dwarf_line_buffer + offset; + + /* read in the header */ + lh->total_length = read_initial_length (abfd, line_ptr, NULL, &bytes_read); + line_ptr += bytes_read; + if (line_ptr + lh->total_length > dwarf_line_buffer + dwarf_line_size) + { + complain (&dwarf2_statement_list_fits_in_line_number_section); + return 0; + } + lh->statement_program_end = line_ptr + lh->total_length; + lh->version = read_2_bytes (abfd, line_ptr); + line_ptr += 2; + lh->header_length = read_offset (abfd, line_ptr, cu_header, &bytes_read); + line_ptr += bytes_read; + lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); + line_ptr += 1; + lh->default_is_stmt = read_1_byte (abfd, line_ptr); + line_ptr += 1; + lh->line_base = read_1_signed_byte (abfd, line_ptr); + line_ptr += 1; + lh->line_range = read_1_byte (abfd, line_ptr); + line_ptr += 1; + lh->opcode_base = read_1_byte (abfd, line_ptr); + line_ptr += 1; + lh->standard_opcode_lengths + = (unsigned char *) xmalloc (lh->opcode_base * sizeof (unsigned char)); + + lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ + for (i = 1; i < lh->opcode_base; ++i) + { + lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); + line_ptr += 1; + } + + /* Read directory table */ + while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL) + { + line_ptr += bytes_read; + add_include_dir (lh, cur_dir); + } + line_ptr += bytes_read; + + /* Read file name table */ + while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL) + { + unsigned int dir_index, mod_time, length; + + line_ptr += bytes_read; + dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); + line_ptr += bytes_read; + mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); + line_ptr += bytes_read; + length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); + line_ptr += bytes_read; + + add_file_name (lh, cur_file, dir_index, mod_time, length); + } + line_ptr += bytes_read; + lh->statement_program_start = line_ptr; + + if (line_ptr > dwarf_line_buffer + dwarf_line_size) + complain (&dwarf2_line_header_too_long); + + discard_cleanups (back_to); + return lh; +} + +/* This function exists to work around a bug in certain compilers + (particularly GCC 2.95), in which the first line number marker of a + function does not show up until after the prologue, right before + the second line number marker. This function shifts ADDRESS down + to the beginning of the function if necessary, and is called on + addresses passed to record_line. */ + +static CORE_ADDR +check_cu_functions (CORE_ADDR address) +{ + struct function_range *fn; + + /* Find the function_range containing address. */ + if (!cu_first_fn) + return address; + + if (!cu_cached_fn) + cu_cached_fn = cu_first_fn; + + fn = cu_cached_fn; + while (fn) + if (fn->lowpc <= address && fn->highpc > address) + goto found; + else + fn = fn->next; + + fn = cu_first_fn; + while (fn && fn != cu_cached_fn) + if (fn->lowpc <= address && fn->highpc > address) + goto found; + else + fn = fn->next; + + return address; + + found: + if (fn->seen_line) + return address; + if (address != fn->lowpc) + complain (&dwarf2_misplaced_line_number, + (unsigned long) address, fn->name); + fn->seen_line = 1; + return fn->lowpc; +} + +/* Decode the line number information for the compilation unit whose + line number info is at OFFSET in the .debug_line section. + The compilation directory of the file is passed in COMP_DIR. */ + +static void +dwarf_decode_lines (struct line_header *lh, char *comp_dir, bfd *abfd, + const struct comp_unit_head *cu_header) +{ + char *line_ptr; + char *line_end; + unsigned int i, bytes_read; + char *cur_dir; + unsigned char op_code, extended_op, adj_opcode; + + line_ptr = lh->statement_program_start; + line_end = lh->statement_program_end; + + /* Read the statement sequences until there's nothing left. */ + while (line_ptr < line_end) + { + /* state machine registers */ + CORE_ADDR address = 0; + unsigned int file = 1; + unsigned int line = 1; + unsigned int column = 0; + int is_stmt = lh->default_is_stmt; + int basic_block = 0; + int end_sequence = 0; + + /* Start a subfile for the current file of the state machine. */ + if (lh->num_file_names >= file) + { + /* lh->include_dirs and lh->file_names are 0-based, but the + directory and file name numbers in the statement program + are 1-based. */ + struct file_entry *fe = &lh->file_names[file - 1]; + char *dir; + if (fe->dir_index) + dir = lh->include_dirs[fe->dir_index - 1]; + else + dir = comp_dir; + dwarf2_start_subfile (fe->name, dir); + } + + /* Decode the table. */ + while (!end_sequence) + { + op_code = read_1_byte (abfd, line_ptr); + line_ptr += 1; + + if (op_code >= lh->opcode_base) + { /* Special operand. */ + adj_opcode = op_code - lh->opcode_base; + address += (adj_opcode / lh->line_range) + * lh->minimum_instruction_length; + line += lh->line_base + (adj_opcode % lh->line_range); + /* append row to matrix using current values */ + address = check_cu_functions (address); + record_line (current_subfile, line, address); + basic_block = 1; + } + else switch (op_code) + { + case DW_LNS_extended_op: + line_ptr += 1; /* ignore length */ + extended_op = read_1_byte (abfd, line_ptr); + line_ptr += 1; + switch (extended_op) + { + case DW_LNE_end_sequence: + end_sequence = 1; + record_line (current_subfile, 0, address); + break; + case DW_LNE_set_address: + address = read_address (abfd, line_ptr, cu_header, &bytes_read); + line_ptr += bytes_read; + address += baseaddr; + break; + case DW_LNE_define_file: + { + char *cur_file; + unsigned int dir_index, mod_time, length; + + cur_file = read_string (abfd, line_ptr, &bytes_read); + line_ptr += bytes_read; + dir_index = + read_unsigned_leb128 (abfd, line_ptr, &bytes_read); + line_ptr += bytes_read; + mod_time = + read_unsigned_leb128 (abfd, line_ptr, &bytes_read); + line_ptr += bytes_read; + length = + read_unsigned_leb128 (abfd, line_ptr, &bytes_read); + line_ptr += bytes_read; + add_file_name (lh, cur_file, dir_index, mod_time, length); + } + break; + default: + complain (&dwarf2_mangled_line_number_section); + return; + } + break; + case DW_LNS_copy: + address = check_cu_functions (address); + record_line (current_subfile, line, address); + basic_block = 0; + break; + case DW_LNS_advance_pc: + address += lh->minimum_instruction_length + * read_unsigned_leb128 (abfd, line_ptr, &bytes_read); + line_ptr += bytes_read; + break; + case DW_LNS_advance_line: + line += read_signed_leb128 (abfd, line_ptr, &bytes_read); + line_ptr += bytes_read; + break; + case DW_LNS_set_file: + { + /* lh->include_dirs and lh->file_names are 0-based, + but the directory and file name numbers in the + statement program are 1-based. */ + struct file_entry *fe; + char *dir; + file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); + line_ptr += bytes_read; + fe = &lh->file_names[file - 1]; + if (fe->dir_index) + dir = lh->include_dirs[fe->dir_index - 1]; + else + dir = comp_dir; + dwarf2_start_subfile (fe->name, dir); + } + break; + case DW_LNS_set_column: + column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); + line_ptr += bytes_read; + break; + case DW_LNS_negate_stmt: + is_stmt = (!is_stmt); + break; + case DW_LNS_set_basic_block: + basic_block = 1; + break; + /* Add to the address register of the state machine the + address increment value corresponding to special opcode + 255. Ie, this value is scaled by the minimum instruction + length since special opcode 255 would have scaled the + the increment. */ + case DW_LNS_const_add_pc: + address += (lh->minimum_instruction_length + * ((255 - lh->opcode_base) / lh->line_range)); + break; + case DW_LNS_fixed_advance_pc: + address += read_2_bytes (abfd, line_ptr); + line_ptr += 2; + break; + default: + { /* Unknown standard opcode, ignore it. */ + int i; + for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) + { + (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); + line_ptr += bytes_read; + } + } + } + } + } +} + +/* Start a subfile for DWARF. FILENAME is the name of the file and + DIRNAME the name of the source directory which contains FILENAME + or NULL if not known. + This routine tries to keep line numbers from identical absolute and + relative file names in a common subfile. + + Using the `list' example from the GDB testsuite, which resides in + /srcdir and compiling it with Irix6.2 cc in /compdir using a filename + of /srcdir/list0.c yields the following debugging information for list0.c: + + DW_AT_name: /srcdir/list0.c + DW_AT_comp_dir: /compdir + files.files[0].name: list0.h + files.files[0].dir: /srcdir + files.files[1].name: list0.c + files.files[1].dir: /srcdir + + The line number information for list0.c has to end up in a single + subfile, so that `break /srcdir/list0.c:1' works as expected. */ + +static void +dwarf2_start_subfile (char *filename, char *dirname) +{ + /* If the filename isn't absolute, try to match an existing subfile + with the full pathname. */ + + if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) + { + struct subfile *subfile; + char *fullname = concat (dirname, "/", filename, NULL); + + for (subfile = subfiles; subfile; subfile = subfile->next) + { + if (FILENAME_CMP (subfile->name, fullname) == 0) + { + current_subfile = subfile; + xfree (fullname); + return; + } + } + xfree (fullname); + } + start_subfile (filename, dirname); +} + +/* Given a pointer to a DWARF information entry, figure out if we need + to make a symbol table entry for it, and if so, create a new entry + and return a pointer to it. + If TYPE is NULL, determine symbol type from the die, otherwise + used the passed type. */ + +static struct symbol * +new_symbol (struct die_info *die, struct type *type, struct objfile *objfile, + const struct comp_unit_head *cu_header) +{ + struct symbol *sym = NULL; + char *name; + struct attribute *attr = NULL; + struct attribute *attr2 = NULL; + CORE_ADDR addr = 0; + + name = dwarf2_linkage_name (die); + if (name) + { + sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, + sizeof (struct symbol)); + OBJSTAT (objfile, n_syms++); + memset (sym, 0, sizeof (struct symbol)); + SYMBOL_NAME (sym) = obsavestring (name, strlen (name), + &objfile->symbol_obstack); + + /* Default assumptions. + Use the passed type or decode it from the die. */ + SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; + SYMBOL_CLASS (sym) = LOC_STATIC; + if (type != NULL) + SYMBOL_TYPE (sym) = type; + else + SYMBOL_TYPE (sym) = die_type (die, objfile, cu_header); + attr = dwarf_attr (die, DW_AT_decl_line); + if (attr) + { + SYMBOL_LINE (sym) = DW_UNSND (attr); + } + + /* If this symbol is from a C++ compilation, then attempt to + cache the demangled form for future reference. This is a + typical time versus space tradeoff, that was decided in favor + of time because it sped up C++ symbol lookups by a factor of + about 20. */ + + SYMBOL_LANGUAGE (sym) = cu_language; + SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack); + switch (die->tag) + { + case DW_TAG_label: + attr = dwarf_attr (die, DW_AT_low_pc); + if (attr) + { + SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr; + } + SYMBOL_CLASS (sym) = LOC_LABEL; + break; + case DW_TAG_subprogram: + /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by + finish_block. */ + SYMBOL_CLASS (sym) = LOC_BLOCK; + attr2 = dwarf_attr (die, DW_AT_external); + if (attr2 && (DW_UNSND (attr2) != 0)) + { + add_symbol_to_list (sym, &global_symbols); + } + else + { + add_symbol_to_list (sym, list_in_scope); + } + break; + case DW_TAG_variable: + /* Compilation with minimal debug info may result in variables + with missing type entries. Change the misleading `void' type + to something sensible. */ + if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) + SYMBOL_TYPE (sym) = init_type (TYPE_CODE_INT, + TARGET_INT_BIT / HOST_CHAR_BIT, 0, + "<variable, no debug info>", + objfile); + attr = dwarf_attr (die, DW_AT_const_value); + if (attr) + { + dwarf2_const_value (attr, sym, objfile, cu_header); + attr2 = dwarf_attr (die, DW_AT_external); + if (attr2 && (DW_UNSND (attr2) != 0)) + add_symbol_to_list (sym, &global_symbols); + else + add_symbol_to_list (sym, list_in_scope); + break; + } + attr = dwarf_attr (die, DW_AT_location); + if (attr) + { + attr2 = dwarf_attr (die, DW_AT_external); + if (attr2 && (DW_UNSND (attr2) != 0)) + { + /* Support the .debug_loc offsets */ + if (attr_form_is_block (attr)) + { + SYMBOL_VALUE_ADDRESS (sym) = + decode_locdesc (DW_BLOCK (attr), objfile, cu_header); + } + else if (attr->form == DW_FORM_data4 + || attr->form == DW_FORM_data8) + { + complain (&dwarf2_complex_location_expr); + } + else + { + complain (&dwarf2_invalid_attrib_class, "DW_AT_location", + "external variable"); + } + add_symbol_to_list (sym, &global_symbols); + + /* In shared libraries the address of the variable + in the location descriptor might still be relocatable, + so its value could be zero. + Enter the symbol as a LOC_UNRESOLVED symbol, if its + value is zero, the address of the variable will then + be determined from the minimal symbol table whenever + the variable is referenced. */ + if (SYMBOL_VALUE_ADDRESS (sym)) + { + fixup_symbol_section (sym, objfile); + SYMBOL_VALUE_ADDRESS (sym) += + ANOFFSET (objfile->section_offsets, + SYMBOL_SECTION (sym)); + SYMBOL_CLASS (sym) = LOC_STATIC; + } + else + SYMBOL_CLASS (sym) = LOC_UNRESOLVED; + } + else + { + /* Support the .debug_loc offsets */ + if (attr_form_is_block (attr)) + { + SYMBOL_VALUE (sym) = addr = + decode_locdesc (DW_BLOCK (attr), objfile, cu_header); + } + else if (attr->form == DW_FORM_data4 + || attr->form == DW_FORM_data8) + { + complain (&dwarf2_complex_location_expr); + } + else + { + complain (&dwarf2_invalid_attrib_class, "DW_AT_location", + "external variable"); + addr = 0; + } + add_symbol_to_list (sym, list_in_scope); + if (optimized_out) + { + SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT; + } + else if (isreg) + { + SYMBOL_CLASS (sym) = LOC_REGISTER; + SYMBOL_VALUE (sym) = + DWARF2_REG_TO_REGNUM (SYMBOL_VALUE (sym)); + } + else if (offreg) + { + SYMBOL_CLASS (sym) = LOC_BASEREG; + SYMBOL_BASEREG (sym) = DWARF2_REG_TO_REGNUM (basereg); + } + else if (islocal) + { + SYMBOL_CLASS (sym) = LOC_LOCAL; + } + else + { + fixup_symbol_section (sym, objfile); + SYMBOL_VALUE_ADDRESS (sym) = + addr + ANOFFSET (objfile->section_offsets, + SYMBOL_SECTION (sym)); + SYMBOL_CLASS (sym) = LOC_STATIC; + } + } + } + else + { + /* We do not know the address of this symbol. + If it is an external symbol and we have type information + for it, enter the symbol as a LOC_UNRESOLVED symbol. + The address of the variable will then be determined from + the minimal symbol table whenever the variable is + referenced. */ + attr2 = dwarf_attr (die, DW_AT_external); + if (attr2 && (DW_UNSND (attr2) != 0) + && dwarf_attr (die, DW_AT_type) != NULL) + { + SYMBOL_CLASS (sym) = LOC_UNRESOLVED; + add_symbol_to_list (sym, &global_symbols); + } + } + break; + case DW_TAG_formal_parameter: + attr = dwarf_attr (die, DW_AT_location); + if (attr) + { + SYMBOL_VALUE (sym) = + decode_locdesc (DW_BLOCK (attr), objfile, cu_header); + if (isreg) + { + SYMBOL_CLASS (sym) = LOC_REGPARM; + SYMBOL_VALUE (sym) = + DWARF2_REG_TO_REGNUM (SYMBOL_VALUE (sym)); + } + else if (offreg) + { + if (isderef) + { + if (basereg != frame_base_reg) + complain (&dwarf2_complex_location_expr); + SYMBOL_CLASS (sym) = LOC_REF_ARG; + } + else + { + SYMBOL_CLASS (sym) = LOC_BASEREG_ARG; + SYMBOL_BASEREG (sym) = DWARF2_REG_TO_REGNUM (basereg); + } + } + else + { + SYMBOL_CLASS (sym) = LOC_ARG; + } + } + attr = dwarf_attr (die, DW_AT_const_value); + if (attr) + { + dwarf2_const_value (attr, sym, objfile, cu_header); + } + add_symbol_to_list (sym, list_in_scope); + break; + case DW_TAG_unspecified_parameters: + /* From varargs functions; gdb doesn't seem to have any + interest in this information, so just ignore it for now. + (FIXME?) */ + break; + case DW_TAG_class_type: + case DW_TAG_structure_type: + case DW_TAG_union_type: + case DW_TAG_enumeration_type: + SYMBOL_CLASS (sym) = LOC_TYPEDEF; + SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; + add_symbol_to_list (sym, list_in_scope); + + /* The semantics of C++ state that "struct foo { ... }" also + defines a typedef for "foo". Synthesize a typedef symbol so + that "ptype foo" works as expected. */ + if (cu_language == language_cplus) + { + struct symbol *typedef_sym = (struct symbol *) + obstack_alloc (&objfile->symbol_obstack, + sizeof (struct symbol)); + *typedef_sym = *sym; + SYMBOL_NAMESPACE (typedef_sym) = VAR_NAMESPACE; + if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) + TYPE_NAME (SYMBOL_TYPE (sym)) = + obsavestring (SYMBOL_NAME (sym), + strlen (SYMBOL_NAME (sym)), + &objfile->type_obstack); + add_symbol_to_list (typedef_sym, list_in_scope); + } + break; + case DW_TAG_typedef: + case DW_TAG_base_type: + SYMBOL_CLASS (sym) = LOC_TYPEDEF; + SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; + add_symbol_to_list (sym, list_in_scope); + break; + case DW_TAG_enumerator: + attr = dwarf_attr (die, DW_AT_const_value); + if (attr) + { + dwarf2_const_value (attr, sym, objfile, cu_header); + } + add_symbol_to_list (sym, list_in_scope); + break; + default: + /* Not a tag we recognize. Hopefully we aren't processing + trash data, but since we must specifically ignore things + we don't recognize, there is nothing else we should do at + this point. */ + complain (&dwarf2_unsupported_tag, dwarf_tag_name (die->tag)); + break; + } + } + return (sym); +} + +/* Copy constant value from an attribute to a symbol. */ + +static void +dwarf2_const_value (struct attribute *attr, struct symbol *sym, + struct objfile *objfile, + const struct comp_unit_head *cu_header) +{ + struct dwarf_block *blk; + + switch (attr->form) + { + case DW_FORM_addr: + if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != cu_header->addr_size) + complain (&dwarf2_const_value_length_mismatch, SYMBOL_NAME (sym), + cu_header->addr_size, TYPE_LENGTH (SYMBOL_TYPE (sym))); + SYMBOL_VALUE_BYTES (sym) = (char *) + obstack_alloc (&objfile->symbol_obstack, cu_header->addr_size); + store_address (SYMBOL_VALUE_BYTES (sym), cu_header->addr_size, + DW_ADDR (attr)); + SYMBOL_CLASS (sym) = LOC_CONST_BYTES; + break; + case DW_FORM_block1: + case DW_FORM_block2: + case DW_FORM_block4: + case DW_FORM_block: + blk = DW_BLOCK (attr); + if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size) + complain (&dwarf2_const_value_length_mismatch, SYMBOL_NAME (sym), + blk->size, TYPE_LENGTH (SYMBOL_TYPE (sym))); + SYMBOL_VALUE_BYTES (sym) = (char *) + obstack_alloc (&objfile->symbol_obstack, blk->size); + memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size); + SYMBOL_CLASS (sym) = LOC_CONST_BYTES; + break; + + /* The DW_AT_const_value attributes are supposed to carry the + symbol's value "represented as it would be on the target + architecture." By the time we get here, it's already been + converted to host endianness, so we just need to sign- or + zero-extend it as appropriate. */ + case DW_FORM_data1: + dwarf2_const_value_data (attr, sym, 8); + break; + case DW_FORM_data2: + dwarf2_const_value_data (attr, sym, 16); + break; + case DW_FORM_data4: + dwarf2_const_value_data (attr, sym, 32); + break; + case DW_FORM_data8: + dwarf2_const_value_data (attr, sym, 64); + break; + + case DW_FORM_sdata: + SYMBOL_VALUE (sym) = DW_SND (attr); + SYMBOL_CLASS (sym) = LOC_CONST; + break; + + case DW_FORM_udata: + SYMBOL_VALUE (sym) = DW_UNSND (attr); + SYMBOL_CLASS (sym) = LOC_CONST; + break; + + default: + complain (&dwarf2_unsupported_const_value_attr, + dwarf_form_name (attr->form)); + SYMBOL_VALUE (sym) = 0; + SYMBOL_CLASS (sym) = LOC_CONST; + break; + } +} + + +/* Given an attr with a DW_FORM_dataN value in host byte order, sign- + or zero-extend it as appropriate for the symbol's type. */ +static void +dwarf2_const_value_data (struct attribute *attr, + struct symbol *sym, + int bits) +{ + LONGEST l = DW_UNSND (attr); + + if (bits < sizeof (l) * 8) + { + if (TYPE_UNSIGNED (SYMBOL_TYPE (sym))) + l &= ((LONGEST) 1 << bits) - 1; + else + l = (l << (sizeof (l) * 8 - bits)) >> (sizeof (l) * 8 - bits); + } + + SYMBOL_VALUE (sym) = l; + SYMBOL_CLASS (sym) = LOC_CONST; +} + + +/* Return the type of the die in question using its DW_AT_type attribute. */ + +static struct type * +die_type (struct die_info *die, struct objfile *objfile, + const struct comp_unit_head *cu_header) +{ + struct type *type; + struct attribute *type_attr; + struct die_info *type_die; + unsigned int ref; + + type_attr = dwarf_attr (die, DW_AT_type); + if (!type_attr) + { + /* A missing DW_AT_type represents a void type. */ + return dwarf2_fundamental_type (objfile, FT_VOID); + } + else + { + ref = dwarf2_get_ref_die_offset (type_attr); + type_die = follow_die_ref (ref); + if (!type_die) + { + error ("Dwarf Error: Cannot find referent at offset %d.", ref); + return NULL; + } + } + type = tag_type_to_type (type_die, objfile, cu_header); + if (!type) + { + dump_die (type_die); + error ("Dwarf Error: Problem turning type die at offset into gdb type."); + } + return type; +} + +/* Return the containing type of the die in question using its + DW_AT_containing_type attribute. */ + +static struct type * +die_containing_type (struct die_info *die, struct objfile *objfile, + const struct comp_unit_head *cu_header) +{ + struct type *type = NULL; + struct attribute *type_attr; + struct die_info *type_die = NULL; + unsigned int ref; + + type_attr = dwarf_attr (die, DW_AT_containing_type); + if (type_attr) + { + ref = dwarf2_get_ref_die_offset (type_attr); + type_die = follow_die_ref (ref); + if (!type_die) + { + error ("Dwarf Error: Cannot find referent at offset %d.", ref); + return NULL; + } + type = tag_type_to_type (type_die, objfile, cu_header); + } + if (!type) + { + if (type_die) + dump_die (type_die); + error ("Dwarf Error: Problem turning containing type into gdb type."); + } + return type; +} + +#if 0 +static struct type * +type_at_offset (unsigned int offset, struct objfile *objfile) +{ + struct die_info *die; + struct type *type; + + die = follow_die_ref (offset); + if (!die) + { + error ("Dwarf Error: Cannot find type referent at offset %d.", offset); + return NULL; + } + type = tag_type_to_type (die, objfile); + return type; +} +#endif + +static struct type * +tag_type_to_type (struct die_info *die, struct objfile *objfile, + const struct comp_unit_head *cu_header) +{ + if (die->type) + { + return die->type; + } + else + { + read_type_die (die, objfile, cu_header); + if (!die->type) + { + dump_die (die); + error ("Dwarf Error: Cannot find type of die."); + } + return die->type; + } +} + +static void +read_type_die (struct die_info *die, struct objfile *objfile, + const struct comp_unit_head *cu_header) +{ + switch (die->tag) + { + case DW_TAG_class_type: + case DW_TAG_structure_type: + case DW_TAG_union_type: + read_structure_scope (die, objfile, cu_header); + break; + case DW_TAG_enumeration_type: + read_enumeration (die, objfile, cu_header); + break; + case DW_TAG_subprogram: + case DW_TAG_subroutine_type: + read_subroutine_type (die, objfile, cu_header); + break; + case DW_TAG_array_type: + read_array_type (die, objfile, cu_header); + break; + case DW_TAG_pointer_type: + read_tag_pointer_type (die, objfile, cu_header); + break; + case DW_TAG_ptr_to_member_type: + read_tag_ptr_to_member_type (die, objfile, cu_header); + break; + case DW_TAG_reference_type: + read_tag_reference_type (die, objfile, cu_header); + break; + case DW_TAG_const_type: + read_tag_const_type (die, objfile, cu_header); + break; + case DW_TAG_volatile_type: + read_tag_volatile_type (die, objfile, cu_header); + break; + case DW_TAG_string_type: + read_tag_string_type (die, objfile); + break; + case DW_TAG_typedef: + read_typedef (die, objfile, cu_header); + break; + case DW_TAG_base_type: + read_base_type (die, objfile); + break; + default: + complain (&dwarf2_unexpected_tag, dwarf_tag_name (die->tag)); + break; + } +} + +static struct type * +dwarf_base_type (int encoding, int size, struct objfile *objfile) +{ + /* FIXME - this should not produce a new (struct type *) + every time. It should cache base types. */ + struct type *type; + switch (encoding) + { + case DW_ATE_address: + type = dwarf2_fundamental_type (objfile, FT_VOID); + return type; + case DW_ATE_boolean: + type = dwarf2_fundamental_type (objfile, FT_BOOLEAN); + return type; + case DW_ATE_complex_float: + if (size == 16) + { + type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_COMPLEX); + } + else + { + type = dwarf2_fundamental_type (objfile, FT_COMPLEX); + } + return type; + case DW_ATE_float: + if (size == 8) + { + type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_FLOAT); + } + else + { + type = dwarf2_fundamental_type (objfile, FT_FLOAT); + } + return type; + case DW_ATE_signed: + switch (size) + { + case 1: + type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR); + break; + case 2: + type = dwarf2_fundamental_type (objfile, FT_SIGNED_SHORT); + break; + default: + case 4: + type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER); + break; + } + return type; + case DW_ATE_signed_char: + type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR); + return type; + case DW_ATE_unsigned: + switch (size) + { + case 1: + type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR); + break; + case 2: + type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_SHORT); + break; + default: + case 4: + type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_INTEGER); + break; + } + return type; + case DW_ATE_unsigned_char: + type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR); + return type; + default: + type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER); + return type; + } +} + +#if 0 +struct die_info * +copy_die (struct die_info *old_die) +{ + struct die_info *new_die; + int i, num_attrs; + + new_die = (struct die_info *) xmalloc (sizeof (struct die_info)); + memset (new_die, 0, sizeof (struct die_info)); + + new_die->tag = old_die->tag; + new_die->has_children = old_die->has_children; + new_die->abbrev = old_die->abbrev; + new_die->offset = old_die->offset; + new_die->type = NULL; + + num_attrs = old_die->num_attrs; + new_die->num_attrs = num_attrs; + new_die->attrs = (struct attribute *) + xmalloc (num_attrs * sizeof (struct attribute)); + + for (i = 0; i < old_die->num_attrs; ++i) + { + new_die->attrs[i].name = old_die->attrs[i].name; + new_die->attrs[i].form = old_die->attrs[i].form; + new_die->attrs[i].u.addr = old_die->attrs[i].u.addr; + } + + new_die->next = NULL; + return new_die; +} +#endif + +/* Return sibling of die, NULL if no sibling. */ + +static struct die_info * +sibling_die (struct die_info *die) +{ + int nesting_level = 0; + + if (!die->has_children) + { + if (die->next && (die->next->tag == 0)) + { + return NULL; + } + else + { + return die->next; + } + } + else + { + do + { + if (die->has_children) + { + nesting_level++; + } + if (die->tag == 0) + { + nesting_level--; + } + die = die->next; + } + while (nesting_level); + if (die && (die->tag == 0)) + { + return NULL; + } + else + { + return die; + } + } +} + +/* Get linkage name of a die, return NULL if not found. */ + +static char * +dwarf2_linkage_name (struct die_info *die) +{ + struct attribute *attr; + + attr = dwarf_attr (die, DW_AT_MIPS_linkage_name); + if (attr && DW_STRING (attr)) + return DW_STRING (attr); + attr = dwarf_attr (die, DW_AT_name); + if (attr && DW_STRING (attr)) + return DW_STRING (attr); + return NULL; +} + +/* Convert a DIE tag into its string name. */ + +static char * +dwarf_tag_name (register unsigned tag) +{ + switch (tag) + { + case DW_TAG_padding: + return "DW_TAG_padding"; + case DW_TAG_array_type: + return "DW_TAG_array_type"; + case DW_TAG_class_type: + return "DW_TAG_class_type"; + case DW_TAG_entry_point: + return "DW_TAG_entry_point"; + case DW_TAG_enumeration_type: + return "DW_TAG_enumeration_type"; + case DW_TAG_formal_parameter: + return "DW_TAG_formal_parameter"; + case DW_TAG_imported_declaration: + return "DW_TAG_imported_declaration"; + case DW_TAG_label: + return "DW_TAG_label"; + case DW_TAG_lexical_block: + return "DW_TAG_lexical_block"; + case DW_TAG_member: + return "DW_TAG_member"; + case DW_TAG_pointer_type: + return "DW_TAG_pointer_type"; + case DW_TAG_reference_type: + return "DW_TAG_reference_type"; + case DW_TAG_compile_unit: + return "DW_TAG_compile_unit"; + case DW_TAG_string_type: + return "DW_TAG_string_type"; + case DW_TAG_structure_type: + return "DW_TAG_structure_type"; + case DW_TAG_subroutine_type: + return "DW_TAG_subroutine_type"; + case DW_TAG_typedef: + return "DW_TAG_typedef"; + case DW_TAG_union_type: + return "DW_TAG_union_type"; + case DW_TAG_unspecified_parameters: + return "DW_TAG_unspecified_parameters"; + case DW_TAG_variant: + return "DW_TAG_variant"; + case DW_TAG_common_block: + return "DW_TAG_common_block"; + case DW_TAG_common_inclusion: + return "DW_TAG_common_inclusion"; + case DW_TAG_inheritance: + return "DW_TAG_inheritance"; + case DW_TAG_inlined_subroutine: + return "DW_TAG_inlined_subroutine"; + case DW_TAG_module: + return "DW_TAG_module"; + case DW_TAG_ptr_to_member_type: + return "DW_TAG_ptr_to_member_type"; + case DW_TAG_set_type: + return "DW_TAG_set_type"; + case DW_TAG_subrange_type: + return "DW_TAG_subrange_type"; + case DW_TAG_with_stmt: + return "DW_TAG_with_stmt"; + case DW_TAG_access_declaration: + return "DW_TAG_access_declaration"; + case DW_TAG_base_type: + return "DW_TAG_base_type"; + case DW_TAG_catch_block: + return "DW_TAG_catch_block"; + case DW_TAG_const_type: + return "DW_TAG_const_type"; + case DW_TAG_constant: + return "DW_TAG_constant"; + case DW_TAG_enumerator: + return "DW_TAG_enumerator"; + case DW_TAG_file_type: + return "DW_TAG_file_type"; + case DW_TAG_friend: + return "DW_TAG_friend"; + case DW_TAG_namelist: + return "DW_TAG_namelist"; + case DW_TAG_namelist_item: + return "DW_TAG_namelist_item"; + case DW_TAG_packed_type: + return "DW_TAG_packed_type"; + case DW_TAG_subprogram: + return "DW_TAG_subprogram"; + case DW_TAG_template_type_param: + return "DW_TAG_template_type_param"; + case DW_TAG_template_value_param: + return "DW_TAG_template_value_param"; + case DW_TAG_thrown_type: + return "DW_TAG_thrown_type"; + case DW_TAG_try_block: + return "DW_TAG_try_block"; + case DW_TAG_variant_part: + return "DW_TAG_variant_part"; + case DW_TAG_variable: + return "DW_TAG_variable"; + case DW_TAG_volatile_type: + return "DW_TAG_volatile_type"; + case DW_TAG_MIPS_loop: + return "DW_TAG_MIPS_loop"; + case DW_TAG_format_label: + return "DW_TAG_format_label"; + case DW_TAG_function_template: + return "DW_TAG_function_template"; + case DW_TAG_class_template: + return "DW_TAG_class_template"; + default: + return "DW_TAG_<unknown>"; + } +} + +/* Convert a DWARF attribute code into its string name. */ + +static char * +dwarf_attr_name (register unsigned attr) +{ + switch (attr) + { + case DW_AT_sibling: + return "DW_AT_sibling"; + case DW_AT_location: + return "DW_AT_location"; + case DW_AT_name: + return "DW_AT_name"; + case DW_AT_ordering: + return "DW_AT_ordering"; + case DW_AT_subscr_data: + return "DW_AT_subscr_data"; + case DW_AT_byte_size: + return "DW_AT_byte_size"; + case DW_AT_bit_offset: + return "DW_AT_bit_offset"; + case DW_AT_bit_size: + return "DW_AT_bit_size"; + case DW_AT_element_list: + return "DW_AT_element_list"; + case DW_AT_stmt_list: + return "DW_AT_stmt_list"; + case DW_AT_low_pc: + return "DW_AT_low_pc"; + case DW_AT_high_pc: + return "DW_AT_high_pc"; + case DW_AT_language: + return "DW_AT_language"; + case DW_AT_member: + return "DW_AT_member"; + case DW_AT_discr: + return "DW_AT_discr"; + case DW_AT_discr_value: + return "DW_AT_discr_value"; + case DW_AT_visibility: + return "DW_AT_visibility"; + case DW_AT_import: + return "DW_AT_import"; + case DW_AT_string_length: + return "DW_AT_string_length"; + case DW_AT_common_reference: + return "DW_AT_common_reference"; + case DW_AT_comp_dir: + return "DW_AT_comp_dir"; + case DW_AT_const_value: + return "DW_AT_const_value"; + case DW_AT_containing_type: + return "DW_AT_containing_type"; + case DW_AT_default_value: + return "DW_AT_default_value"; + case DW_AT_inline: + return "DW_AT_inline"; + case DW_AT_is_optional: + return "DW_AT_is_optional"; + case DW_AT_lower_bound: + return "DW_AT_lower_bound"; + case DW_AT_producer: + return "DW_AT_producer"; + case DW_AT_prototyped: + return "DW_AT_prototyped"; + case DW_AT_return_addr: + return "DW_AT_return_addr"; + case DW_AT_start_scope: + return "DW_AT_start_scope"; + case DW_AT_stride_size: + return "DW_AT_stride_size"; + case DW_AT_upper_bound: + return "DW_AT_upper_bound"; + case DW_AT_abstract_origin: + return "DW_AT_abstract_origin"; + case DW_AT_accessibility: + return "DW_AT_accessibility"; + case DW_AT_address_class: + return "DW_AT_address_class"; + case DW_AT_artificial: + return "DW_AT_artificial"; + case DW_AT_base_types: + return "DW_AT_base_types"; + case DW_AT_calling_convention: + return "DW_AT_calling_convention"; + case DW_AT_count: + return "DW_AT_count"; + case DW_AT_data_member_location: + return "DW_AT_data_member_location"; + case DW_AT_decl_column: + return "DW_AT_decl_column"; + case DW_AT_decl_file: + return "DW_AT_decl_file"; + case DW_AT_decl_line: + return "DW_AT_decl_line"; + case DW_AT_declaration: + return "DW_AT_declaration"; + case DW_AT_discr_list: + return "DW_AT_discr_list"; + case DW_AT_encoding: + return "DW_AT_encoding"; + case DW_AT_external: + return "DW_AT_external"; + case DW_AT_frame_base: + return "DW_AT_frame_base"; + case DW_AT_friend: + return "DW_AT_friend"; + case DW_AT_identifier_case: + return "DW_AT_identifier_case"; + case DW_AT_macro_info: + return "DW_AT_macro_info"; + case DW_AT_namelist_items: + return "DW_AT_namelist_items"; + case DW_AT_priority: + return "DW_AT_priority"; + case DW_AT_segment: + return "DW_AT_segment"; + case DW_AT_specification: + return "DW_AT_specification"; + case DW_AT_static_link: + return "DW_AT_static_link"; + case DW_AT_type: + return "DW_AT_type"; + case DW_AT_use_location: + return "DW_AT_use_location"; + case DW_AT_variable_parameter: + return "DW_AT_variable_parameter"; + case DW_AT_virtuality: + return "DW_AT_virtuality"; + case DW_AT_vtable_elem_location: + return "DW_AT_vtable_elem_location"; + +#ifdef MIPS + case DW_AT_MIPS_fde: + return "DW_AT_MIPS_fde"; + case DW_AT_MIPS_loop_begin: + return "DW_AT_MIPS_loop_begin"; + case DW_AT_MIPS_tail_loop_begin: + return "DW_AT_MIPS_tail_loop_begin"; + case DW_AT_MIPS_epilog_begin: + return "DW_AT_MIPS_epilog_begin"; + case DW_AT_MIPS_loop_unroll_factor: + return "DW_AT_MIPS_loop_unroll_factor"; + case DW_AT_MIPS_software_pipeline_depth: + return "DW_AT_MIPS_software_pipeline_depth"; + case DW_AT_MIPS_linkage_name: + return "DW_AT_MIPS_linkage_name"; +#endif + + case DW_AT_sf_names: + return "DW_AT_sf_names"; + case DW_AT_src_info: + return "DW_AT_src_info"; + case DW_AT_mac_info: + return "DW_AT_mac_info"; + case DW_AT_src_coords: + return "DW_AT_src_coords"; + case DW_AT_body_begin: + return "DW_AT_body_begin"; + case DW_AT_body_end: + return "DW_AT_body_end"; + case DW_AT_GNU_vector: + return "DW_AT_GNU_vector"; + default: + return "DW_AT_<unknown>"; + } +} + +/* Convert a DWARF value form code into its string name. */ + +static char * +dwarf_form_name (register unsigned form) +{ + switch (form) + { + case DW_FORM_addr: + return "DW_FORM_addr"; + case DW_FORM_block2: + return "DW_FORM_block2"; + case DW_FORM_block4: + return "DW_FORM_block4"; + case DW_FORM_data2: + return "DW_FORM_data2"; + case DW_FORM_data4: + return "DW_FORM_data4"; + case DW_FORM_data8: + return "DW_FORM_data8"; + case DW_FORM_string: + return "DW_FORM_string"; + case DW_FORM_block: + return "DW_FORM_block"; + case DW_FORM_block1: + return "DW_FORM_block1"; + case DW_FORM_data1: + return "DW_FORM_data1"; + case DW_FORM_flag: + return "DW_FORM_flag"; + case DW_FORM_sdata: + return "DW_FORM_sdata"; + case DW_FORM_strp: + return "DW_FORM_strp"; + case DW_FORM_udata: + return "DW_FORM_udata"; + case DW_FORM_ref_addr: + return "DW_FORM_ref_addr"; + case DW_FORM_ref1: + return "DW_FORM_ref1"; + case DW_FORM_ref2: + return "DW_FORM_ref2"; + case DW_FORM_ref4: + return "DW_FORM_ref4"; + case DW_FORM_ref8: + return "DW_FORM_ref8"; + case DW_FORM_ref_udata: + return "DW_FORM_ref_udata"; + case DW_FORM_indirect: + return "DW_FORM_indirect"; + default: + return "DW_FORM_<unknown>"; + } +} + +/* Convert a DWARF stack opcode into its string name. */ + +static char * +dwarf_stack_op_name (register unsigned op) +{ + switch (op) + { + case DW_OP_addr: + return "DW_OP_addr"; + case DW_OP_deref: + return "DW_OP_deref"; + case DW_OP_const1u: + return "DW_OP_const1u"; + case DW_OP_const1s: + return "DW_OP_const1s"; + case DW_OP_const2u: + return "DW_OP_const2u"; + case DW_OP_const2s: + return "DW_OP_const2s"; + case DW_OP_const4u: + return "DW_OP_const4u"; + case DW_OP_const4s: + return "DW_OP_const4s"; + case DW_OP_const8u: + return "DW_OP_const8u"; + case DW_OP_const8s: + return "DW_OP_const8s"; + case DW_OP_constu: + return "DW_OP_constu"; + case DW_OP_consts: + return "DW_OP_consts"; + case DW_OP_dup: + return "DW_OP_dup"; + case DW_OP_drop: + return "DW_OP_drop"; + case DW_OP_over: + return "DW_OP_over"; + case DW_OP_pick: + return "DW_OP_pick"; + case DW_OP_swap: + return "DW_OP_swap"; + case DW_OP_rot: + return "DW_OP_rot"; + case DW_OP_xderef: + return "DW_OP_xderef"; + case DW_OP_abs: + return "DW_OP_abs"; + case DW_OP_and: + return "DW_OP_and"; + case DW_OP_div: + return "DW_OP_div"; + case DW_OP_minus: + return "DW_OP_minus"; + case DW_OP_mod: + return "DW_OP_mod"; + case DW_OP_mul: + return "DW_OP_mul"; + case DW_OP_neg: + return "DW_OP_neg"; + case DW_OP_not: + return "DW_OP_not"; + case DW_OP_or: + return "DW_OP_or"; + case DW_OP_plus: + return "DW_OP_plus"; + case DW_OP_plus_uconst: + return "DW_OP_plus_uconst"; + case DW_OP_shl: + return "DW_OP_shl"; + case DW_OP_shr: + return "DW_OP_shr"; + case DW_OP_shra: + return "DW_OP_shra"; + case DW_OP_xor: + return "DW_OP_xor"; + case DW_OP_bra: + return "DW_OP_bra"; + case DW_OP_eq: + return "DW_OP_eq"; + case DW_OP_ge: + return "DW_OP_ge"; + case DW_OP_gt: + return "DW_OP_gt"; + case DW_OP_le: + return "DW_OP_le"; + case DW_OP_lt: + return "DW_OP_lt"; + case DW_OP_ne: + return "DW_OP_ne"; + case DW_OP_skip: + return "DW_OP_skip"; + case DW_OP_lit0: + return "DW_OP_lit0"; + case DW_OP_lit1: + return "DW_OP_lit1"; + case DW_OP_lit2: + return "DW_OP_lit2"; + case DW_OP_lit3: + return "DW_OP_lit3"; + case DW_OP_lit4: + return "DW_OP_lit4"; + case DW_OP_lit5: + return "DW_OP_lit5"; + case DW_OP_lit6: + return "DW_OP_lit6"; + case DW_OP_lit7: + return "DW_OP_lit7"; + case DW_OP_lit8: + return "DW_OP_lit8"; + case DW_OP_lit9: + return "DW_OP_lit9"; + case DW_OP_lit10: + return "DW_OP_lit10"; + case DW_OP_lit11: + return "DW_OP_lit11"; + case DW_OP_lit12: + return "DW_OP_lit12"; + case DW_OP_lit13: + return "DW_OP_lit13"; + case DW_OP_lit14: + return "DW_OP_lit14"; + case DW_OP_lit15: + return "DW_OP_lit15"; + case DW_OP_lit16: + return "DW_OP_lit16"; + case DW_OP_lit17: + return "DW_OP_lit17"; + case DW_OP_lit18: + return "DW_OP_lit18"; + case DW_OP_lit19: + return "DW_OP_lit19"; + case DW_OP_lit20: + return "DW_OP_lit20"; + case DW_OP_lit21: + return "DW_OP_lit21"; + case DW_OP_lit22: + return "DW_OP_lit22"; + case DW_OP_lit23: + return "DW_OP_lit23"; + case DW_OP_lit24: + return "DW_OP_lit24"; + case DW_OP_lit25: + return "DW_OP_lit25"; + case DW_OP_lit26: + return "DW_OP_lit26"; + case DW_OP_lit27: + return "DW_OP_lit27"; + case DW_OP_lit28: + return "DW_OP_lit28"; + case DW_OP_lit29: + return "DW_OP_lit29"; + case DW_OP_lit30: + return "DW_OP_lit30"; + case DW_OP_lit31: + return "DW_OP_lit31"; + case DW_OP_reg0: + return "DW_OP_reg0"; + case DW_OP_reg1: + return "DW_OP_reg1"; + case DW_OP_reg2: + return "DW_OP_reg2"; + case DW_OP_reg3: + return "DW_OP_reg3"; + case DW_OP_reg4: + return "DW_OP_reg4"; + case DW_OP_reg5: + return "DW_OP_reg5"; + case DW_OP_reg6: + return "DW_OP_reg6"; + case DW_OP_reg7: + return "DW_OP_reg7"; + case DW_OP_reg8: + return "DW_OP_reg8"; + case DW_OP_reg9: + return "DW_OP_reg9"; + case DW_OP_reg10: + return "DW_OP_reg10"; + case DW_OP_reg11: + return "DW_OP_reg11"; + case DW_OP_reg12: + return "DW_OP_reg12"; + case DW_OP_reg13: + return "DW_OP_reg13"; + case DW_OP_reg14: + return "DW_OP_reg14"; + case DW_OP_reg15: + return "DW_OP_reg15"; + case DW_OP_reg16: + return "DW_OP_reg16"; + case DW_OP_reg17: + return "DW_OP_reg17"; + case DW_OP_reg18: + return "DW_OP_reg18"; + case DW_OP_reg19: + return "DW_OP_reg19"; + case DW_OP_reg20: + return "DW_OP_reg20"; + case DW_OP_reg21: + return "DW_OP_reg21"; + case DW_OP_reg22: + return "DW_OP_reg22"; + case DW_OP_reg23: + return "DW_OP_reg23"; + case DW_OP_reg24: + return "DW_OP_reg24"; + case DW_OP_reg25: + return "DW_OP_reg25"; + case DW_OP_reg26: + return "DW_OP_reg26"; + case DW_OP_reg27: + return "DW_OP_reg27"; + case DW_OP_reg28: + return "DW_OP_reg28"; + case DW_OP_reg29: + return "DW_OP_reg29"; + case DW_OP_reg30: + return "DW_OP_reg30"; + case DW_OP_reg31: + return "DW_OP_reg31"; + case DW_OP_breg0: + return "DW_OP_breg0"; + case DW_OP_breg1: + return "DW_OP_breg1"; + case DW_OP_breg2: + return "DW_OP_breg2"; + case DW_OP_breg3: + return "DW_OP_breg3"; + case DW_OP_breg4: + return "DW_OP_breg4"; + case DW_OP_breg5: + return "DW_OP_breg5"; + case DW_OP_breg6: + return "DW_OP_breg6"; + case DW_OP_breg7: + return "DW_OP_breg7"; + case DW_OP_breg8: + return "DW_OP_breg8"; + case DW_OP_breg9: + return "DW_OP_breg9"; + case DW_OP_breg10: + return "DW_OP_breg10"; + case DW_OP_breg11: + return "DW_OP_breg11"; + case DW_OP_breg12: + return "DW_OP_breg12"; + case DW_OP_breg13: + return "DW_OP_breg13"; + case DW_OP_breg14: + return "DW_OP_breg14"; + case DW_OP_breg15: + return "DW_OP_breg15"; + case DW_OP_breg16: + return "DW_OP_breg16"; + case DW_OP_breg17: + return "DW_OP_breg17"; + case DW_OP_breg18: + return "DW_OP_breg18"; + case DW_OP_breg19: + return "DW_OP_breg19"; + case DW_OP_breg20: + return "DW_OP_breg20"; + case DW_OP_breg21: + return "DW_OP_breg21"; + case DW_OP_breg22: + return "DW_OP_breg22"; + case DW_OP_breg23: + return "DW_OP_breg23"; + case DW_OP_breg24: + return "DW_OP_breg24"; + case DW_OP_breg25: + return "DW_OP_breg25"; + case DW_OP_breg26: + return "DW_OP_breg26"; + case DW_OP_breg27: + return "DW_OP_breg27"; + case DW_OP_breg28: + return "DW_OP_breg28"; + case DW_OP_breg29: + return "DW_OP_breg29"; + case DW_OP_breg30: + return "DW_OP_breg30"; + case DW_OP_breg31: + return "DW_OP_breg31"; + case DW_OP_regx: + return "DW_OP_regx"; + case DW_OP_fbreg: + return "DW_OP_fbreg"; + case DW_OP_bregx: + return "DW_OP_bregx"; + case DW_OP_piece: + return "DW_OP_piece"; + case DW_OP_deref_size: + return "DW_OP_deref_size"; + case DW_OP_xderef_size: + return "DW_OP_xderef_size"; + case DW_OP_nop: + return "DW_OP_nop"; + default: + return "OP_<unknown>"; + } +} + +static char * +dwarf_bool_name (unsigned mybool) +{ + if (mybool) + return "TRUE"; + else + return "FALSE"; +} + +/* Convert a DWARF type code into its string name. */ + +static char * +dwarf_type_encoding_name (register unsigned enc) +{ + switch (enc) + { + case DW_ATE_address: + return "DW_ATE_address"; + case DW_ATE_boolean: + return "DW_ATE_boolean"; + case DW_ATE_complex_float: + return "DW_ATE_complex_float"; + case DW_ATE_float: + return "DW_ATE_float"; + case DW_ATE_signed: + return "DW_ATE_signed"; + case DW_ATE_signed_char: + return "DW_ATE_signed_char"; + case DW_ATE_unsigned: + return "DW_ATE_unsigned"; + case DW_ATE_unsigned_char: + return "DW_ATE_unsigned_char"; + default: + return "DW_ATE_<unknown>"; + } +} + +/* Convert a DWARF call frame info operation to its string name. */ + +#if 0 +static char * +dwarf_cfi_name (register unsigned cfi_opc) +{ + switch (cfi_opc) + { + case DW_CFA_advance_loc: + return "DW_CFA_advance_loc"; + case DW_CFA_offset: + return "DW_CFA_offset"; + case DW_CFA_restore: + return "DW_CFA_restore"; + case DW_CFA_nop: + return "DW_CFA_nop"; + case DW_CFA_set_loc: + return "DW_CFA_set_loc"; + case DW_CFA_advance_loc1: + return "DW_CFA_advance_loc1"; + case DW_CFA_advance_loc2: + return "DW_CFA_advance_loc2"; + case DW_CFA_advance_loc4: + return "DW_CFA_advance_loc4"; + case DW_CFA_offset_extended: + return "DW_CFA_offset_extended"; + case DW_CFA_restore_extended: + return "DW_CFA_restore_extended"; + case DW_CFA_undefined: + return "DW_CFA_undefined"; + case DW_CFA_same_value: + return "DW_CFA_same_value"; + case DW_CFA_register: + return "DW_CFA_register"; + case DW_CFA_remember_state: + return "DW_CFA_remember_state"; + case DW_CFA_restore_state: + return "DW_CFA_restore_state"; + case DW_CFA_def_cfa: + return "DW_CFA_def_cfa"; + case DW_CFA_def_cfa_register: + return "DW_CFA_def_cfa_register"; + case DW_CFA_def_cfa_offset: + return "DW_CFA_def_cfa_offset"; + + /* DWARF 3 */ + case DW_CFA_def_cfa_expression: + return "DW_CFA_def_cfa_expression"; + case DW_CFA_expression: + return "DW_CFA_expression"; + case DW_CFA_offset_extended_sf: + return "DW_CFA_offset_extended_sf"; + case DW_CFA_def_cfa_sf: + return "DW_CFA_def_cfa_sf"; + case DW_CFA_def_cfa_offset_sf: + return "DW_CFA_def_cfa_offset_sf"; + + /* SGI/MIPS specific */ + case DW_CFA_MIPS_advance_loc8: + return "DW_CFA_MIPS_advance_loc8"; + + /* GNU extensions */ + case DW_CFA_GNU_window_save: + return "DW_CFA_GNU_window_save"; + case DW_CFA_GNU_args_size: + return "DW_CFA_GNU_args_size"; + case DW_CFA_GNU_negative_offset_extended: + return "DW_CFA_GNU_negative_offset_extended"; + + default: + return "DW_CFA_<unknown>"; + } +} +#endif + +static void +dump_die (struct die_info *die) +{ + unsigned int i; + + fprintf_unfiltered (gdb_stderr, "Die: %s (abbrev = %d, offset = %d)\n", + dwarf_tag_name (die->tag), die->abbrev, die->offset); + fprintf_unfiltered (gdb_stderr, "\thas children: %s\n", + dwarf_bool_name (die->has_children)); + + fprintf_unfiltered (gdb_stderr, "\tattributes:\n"); + for (i = 0; i < die->num_attrs; ++i) + { + fprintf_unfiltered (gdb_stderr, "\t\t%s (%s) ", + dwarf_attr_name (die->attrs[i].name), + dwarf_form_name (die->attrs[i].form)); + switch (die->attrs[i].form) + { + case DW_FORM_ref_addr: + case DW_FORM_addr: + fprintf_unfiltered (gdb_stderr, "address: "); + print_address_numeric (DW_ADDR (&die->attrs[i]), 1, gdb_stderr); + break; + case DW_FORM_block2: + case DW_FORM_block4: + case DW_FORM_block: + case DW_FORM_block1: + fprintf_unfiltered (gdb_stderr, "block: size %d", DW_BLOCK (&die->attrs[i])->size); + break; + case DW_FORM_data1: + case DW_FORM_data2: + case DW_FORM_data4: + case DW_FORM_data8: + case DW_FORM_ref1: + case DW_FORM_ref2: + case DW_FORM_ref4: + case DW_FORM_udata: + case DW_FORM_sdata: + fprintf_unfiltered (gdb_stderr, "constant: %ld", DW_UNSND (&die->attrs[i])); + break; + case DW_FORM_string: + case DW_FORM_strp: + fprintf_unfiltered (gdb_stderr, "string: \"%s\"", + DW_STRING (&die->attrs[i]) + ? DW_STRING (&die->attrs[i]) : ""); + break; + case DW_FORM_flag: + if (DW_UNSND (&die->attrs[i])) + fprintf_unfiltered (gdb_stderr, "flag: TRUE"); + else + fprintf_unfiltered (gdb_stderr, "flag: FALSE"); + break; + case DW_FORM_indirect: + /* the reader will have reduced the indirect form to + the "base form" so this form should not occur */ + fprintf_unfiltered (gdb_stderr, "unexpected attribute form: DW_FORM_indirect"); + break; + default: + fprintf_unfiltered (gdb_stderr, "unsupported attribute form: %d.", + die->attrs[i].form); + } + fprintf_unfiltered (gdb_stderr, "\n"); + } +} + +static void +dump_die_list (struct die_info *die) +{ + while (die) + { + dump_die (die); + die = die->next; + } +} + +static void +store_in_ref_table (unsigned int offset, struct die_info *die) +{ + int h; + struct die_info *old; + + h = (offset % REF_HASH_SIZE); + old = die_ref_table[h]; + die->next_ref = old; + die_ref_table[h] = die; +} + + +static void +dwarf2_empty_hash_tables (void) +{ + memset (die_ref_table, 0, sizeof (die_ref_table)); +} + +static unsigned int +dwarf2_get_ref_die_offset (struct attribute *attr) +{ + unsigned int result = 0; + + switch (attr->form) + { + case DW_FORM_ref_addr: + result = DW_ADDR (attr); + break; + case DW_FORM_ref1: + case DW_FORM_ref2: + case DW_FORM_ref4: + case DW_FORM_ref8: + case DW_FORM_ref_udata: + result = cu_header_offset + DW_UNSND (attr); + break; + default: + complain (&dwarf2_unsupported_die_ref_attr, dwarf_form_name (attr->form)); + } + return result; +} + +static struct die_info * +follow_die_ref (unsigned int offset) +{ + struct die_info *die; + int h; + + h = (offset % REF_HASH_SIZE); + die = die_ref_table[h]; + while (die) + { + if (die->offset == offset) + { + return die; + } + die = die->next_ref; + } + return NULL; +} + +static struct type * +dwarf2_fundamental_type (struct objfile *objfile, int typeid) +{ + if (typeid < 0 || typeid >= FT_NUM_MEMBERS) + { + error ("Dwarf Error: internal error - invalid fundamental type id %d.", + typeid); + } + + /* Look for this particular type in the fundamental type vector. If + one is not found, create and install one appropriate for the + current language and the current target machine. */ + + if (ftypes[typeid] == NULL) + { + ftypes[typeid] = cu_language_defn->la_fund_type (objfile, typeid); + } + + return (ftypes[typeid]); +} + +/* Decode simple location descriptions. + Given a pointer to a dwarf block that defines a location, compute + the location and return the value. + + FIXME: This is a kludge until we figure out a better + way to handle the location descriptions. + Gdb's design does not mesh well with the DWARF2 notion of a location + computing interpreter, which is a shame because the flexibility goes unused. + FIXME: Implement more operations as necessary. + + A location description containing no operations indicates that the + object is optimized out. The global optimized_out flag is set for + those, the return value is meaningless. + + When the result is a register number, the global isreg flag is set, + otherwise it is cleared. + + When the result is a base register offset, the global offreg flag is set + and the register number is returned in basereg, otherwise it is cleared. + + When the DW_OP_fbreg operation is encountered without a corresponding + DW_AT_frame_base attribute, the global islocal flag is set. + Hopefully the machine dependent code knows how to set up a virtual + frame pointer for the local references. + + Note that stack[0] is unused except as a default error return. + Note that stack overflow is not yet handled. */ + +static CORE_ADDR +decode_locdesc (struct dwarf_block *blk, struct objfile *objfile, + const struct comp_unit_head *cu_header) +{ + int i; + int size = blk->size; + char *data = blk->data; + CORE_ADDR stack[64]; + int stacki; + unsigned int bytes_read, unsnd; + unsigned char op; + + i = 0; + stacki = 0; + stack[stacki] = 0; + isreg = 0; + offreg = 0; + isderef = 0; + islocal = 0; + optimized_out = 1; + + while (i < size) + { + optimized_out = 0; + op = data[i++]; + switch (op) + { + case DW_OP_lit0: + case DW_OP_lit1: + case DW_OP_lit2: + case DW_OP_lit3: + case DW_OP_lit4: + case DW_OP_lit5: + case DW_OP_lit6: + case DW_OP_lit7: + case DW_OP_lit8: + case DW_OP_lit9: + case DW_OP_lit10: + case DW_OP_lit11: + case DW_OP_lit12: + case DW_OP_lit13: + case DW_OP_lit14: + case DW_OP_lit15: + case DW_OP_lit16: + case DW_OP_lit17: + case DW_OP_lit18: + case DW_OP_lit19: + case DW_OP_lit20: + case DW_OP_lit21: + case DW_OP_lit22: + case DW_OP_lit23: + case DW_OP_lit24: + case DW_OP_lit25: + case DW_OP_lit26: + case DW_OP_lit27: + case DW_OP_lit28: + case DW_OP_lit29: + case DW_OP_lit30: + case DW_OP_lit31: + stack[++stacki] = op - DW_OP_lit0; + break; + + case DW_OP_reg0: + case DW_OP_reg1: + case DW_OP_reg2: + case DW_OP_reg3: + case DW_OP_reg4: + case DW_OP_reg5: + case DW_OP_reg6: + case DW_OP_reg7: + case DW_OP_reg8: + case DW_OP_reg9: + case DW_OP_reg10: + case DW_OP_reg11: + case DW_OP_reg12: + case DW_OP_reg13: + case DW_OP_reg14: + case DW_OP_reg15: + case DW_OP_reg16: + case DW_OP_reg17: + case DW_OP_reg18: + case DW_OP_reg19: + case DW_OP_reg20: + case DW_OP_reg21: + case DW_OP_reg22: + case DW_OP_reg23: + case DW_OP_reg24: + case DW_OP_reg25: + case DW_OP_reg26: + case DW_OP_reg27: + case DW_OP_reg28: + case DW_OP_reg29: + case DW_OP_reg30: + case DW_OP_reg31: + isreg = 1; + stack[++stacki] = op - DW_OP_reg0; + break; + + case DW_OP_regx: + isreg = 1; + unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); + i += bytes_read; + stack[++stacki] = unsnd; + break; + + case DW_OP_breg0: + case DW_OP_breg1: + case DW_OP_breg2: + case DW_OP_breg3: + case DW_OP_breg4: + case DW_OP_breg5: + case DW_OP_breg6: + case DW_OP_breg7: + case DW_OP_breg8: + case DW_OP_breg9: + case DW_OP_breg10: + case DW_OP_breg11: + case DW_OP_breg12: + case DW_OP_breg13: + case DW_OP_breg14: + case DW_OP_breg15: + case DW_OP_breg16: + case DW_OP_breg17: + case DW_OP_breg18: + case DW_OP_breg19: + case DW_OP_breg20: + case DW_OP_breg21: + case DW_OP_breg22: + case DW_OP_breg23: + case DW_OP_breg24: + case DW_OP_breg25: + case DW_OP_breg26: + case DW_OP_breg27: + case DW_OP_breg28: + case DW_OP_breg29: + case DW_OP_breg30: + case DW_OP_breg31: + offreg = 1; + basereg = op - DW_OP_breg0; + stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); + i += bytes_read; + break; + + case DW_OP_bregx: + offreg = 1; + basereg = read_unsigned_leb128 (NULL, (data + i), &bytes_read); + i += bytes_read; + stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); + i += bytes_read; + break; + + case DW_OP_fbreg: + stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); + i += bytes_read; + if (frame_base_reg >= 0) + { + offreg = 1; + basereg = frame_base_reg; + stack[stacki] += frame_base_offset; + } + else + { + complain (&dwarf2_missing_at_frame_base); + islocal = 1; + } + break; + + case DW_OP_addr: + stack[++stacki] = read_address (objfile->obfd, &data[i], + cu_header, &bytes_read); + i += bytes_read; + break; + + case DW_OP_const1u: + stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); + i += 1; + break; + + case DW_OP_const1s: + stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); + i += 1; + break; + + case DW_OP_const2u: + stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); + i += 2; + break; + + case DW_OP_const2s: + stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); + i += 2; + break; + + case DW_OP_const4u: + stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); + i += 4; + break; + + case DW_OP_const4s: + stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); + i += 4; + break; + + case DW_OP_constu: + stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), + &bytes_read); + i += bytes_read; + break; + + case DW_OP_consts: + stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); + i += bytes_read; + break; + + case DW_OP_dup: + stack[stacki + 1] = stack[stacki]; + stacki++; + break; + + case DW_OP_plus: + stack[stacki - 1] += stack[stacki]; + stacki--; + break; + + case DW_OP_plus_uconst: + stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read); + i += bytes_read; + break; + + case DW_OP_minus: + stack[stacki - 1] -= stack[stacki]; + stacki--; + break; + + case DW_OP_deref: + isderef = 1; + /* If we're not the last op, then we definitely can't encode + this using GDB's address_class enum. */ + if (i < size) + complain (&dwarf2_complex_location_expr); + break; + + default: + complain (&dwarf2_unsupported_stack_op, dwarf_stack_op_name (op)); + return (stack[stacki]); + } + } + return (stack[stacki]); +} + +/* memory allocation interface */ + +/* ARGSUSED */ +static void +dwarf2_free_tmp_obstack (PTR ignore) +{ + obstack_free (&dwarf2_tmp_obstack, NULL); +} + +static struct dwarf_block * +dwarf_alloc_block (void) +{ + struct dwarf_block *blk; + + blk = (struct dwarf_block *) + obstack_alloc (&dwarf2_tmp_obstack, sizeof (struct dwarf_block)); + return (blk); +} + +static struct abbrev_info * +dwarf_alloc_abbrev (void) +{ + struct abbrev_info *abbrev; + + abbrev = (struct abbrev_info *) xmalloc (sizeof (struct abbrev_info)); + memset (abbrev, 0, sizeof (struct abbrev_info)); + return (abbrev); +} + +static struct die_info * +dwarf_alloc_die (void) +{ + struct die_info *die; + + die = (struct die_info *) xmalloc (sizeof (struct die_info)); + memset (die, 0, sizeof (struct die_info)); + return (die); +} + + +/* Macro support. */ + + +/* Return the full name of file number I in *LH's file name table. + Use COMP_DIR as the name of the current directory of the + compilation. The result is allocated using xmalloc; the caller is + responsible for freeing it. */ +static char * +file_full_name (int file, struct line_header *lh, const char *comp_dir) +{ + struct file_entry *fe = &lh->file_names[file - 1]; + + if (IS_ABSOLUTE_PATH (fe->name)) + return xstrdup (fe->name); + else + { + const char *dir; + int dir_len; + char *full_name; + + if (fe->dir_index) + dir = lh->include_dirs[fe->dir_index - 1]; + else + dir = comp_dir; + + if (dir) + { + dir_len = strlen (dir); + full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1); + strcpy (full_name, dir); + full_name[dir_len] = '/'; + strcpy (full_name + dir_len + 1, fe->name); + return full_name; + } + else + return xstrdup (fe->name); + } +} + + +static struct macro_source_file * +macro_start_file (int file, int line, + struct macro_source_file *current_file, + const char *comp_dir, + struct line_header *lh, struct objfile *objfile) +{ + /* The full name of this source file. */ + char *full_name = file_full_name (file, lh, comp_dir); + + /* We don't create a macro table for this compilation unit + at all until we actually get a filename. */ + if (! pending_macros) + pending_macros = new_macro_table (&objfile->symbol_obstack, + objfile->macro_cache); + + if (! current_file) + /* If we have no current file, then this must be the start_file + directive for the compilation unit's main source file. */ + current_file = macro_set_main (pending_macros, full_name); + else + current_file = macro_include (current_file, line, full_name); + + xfree (full_name); + + return current_file; +} + + +/* Copy the LEN characters at BUF to a xmalloc'ed block of memory, + followed by a null byte. */ +static char * +copy_string (const char *buf, int len) +{ + char *s = xmalloc (len + 1); + memcpy (s, buf, len); + s[len] = '\0'; + + return s; +} + + +static const char * +consume_improper_spaces (const char *p, const char *body) +{ + if (*p == ' ') + { + complain (&dwarf2_macro_spaces_in_definition, body); + + while (*p == ' ') + p++; + } + + return p; +} + + +static void +parse_macro_definition (struct macro_source_file *file, int line, + const char *body) +{ + const char *p; + + /* The body string takes one of two forms. For object-like macro + definitions, it should be: + + <macro name> " " <definition> + + For function-like macro definitions, it should be: + + <macro name> "() " <definition> + or + <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> + + Spaces may appear only where explicitly indicated, and in the + <definition>. + + The Dwarf 2 spec says that an object-like macro's name is always + followed by a space, but versions of GCC around March 2002 omit + the space when the macro's definition is the empty string. + + The Dwarf 2 spec says that there should be no spaces between the + formal arguments in a function-like macro's formal argument list, + but versions of GCC around March 2002 include spaces after the + commas. */ + + + /* Find the extent of the macro name. The macro name is terminated + by either a space or null character (for an object-like macro) or + an opening paren (for a function-like macro). */ + for (p = body; *p; p++) + if (*p == ' ' || *p == '(') + break; + + if (*p == ' ' || *p == '\0') + { + /* It's an object-like macro. */ + int name_len = p - body; + char *name = copy_string (body, name_len); + const char *replacement; + + if (*p == ' ') + replacement = body + name_len + 1; + else + { + complain (&dwarf2_macro_malformed_definition, body); + replacement = body + name_len; + } + + macro_define_object (file, line, name, replacement); + + xfree (name); + } + else if (*p == '(') + { + /* It's a function-like macro. */ + char *name = copy_string (body, p - body); + int argc = 0; + int argv_size = 1; + char **argv = xmalloc (argv_size * sizeof (*argv)); + + p++; + + p = consume_improper_spaces (p, body); + + /* Parse the formal argument list. */ + while (*p && *p != ')') + { + /* Find the extent of the current argument name. */ + const char *arg_start = p; + + while (*p && *p != ',' && *p != ')' && *p != ' ') + p++; + + if (! *p || p == arg_start) + complain (&dwarf2_macro_malformed_definition, + body); + else + { + /* Make sure argv has room for the new argument. */ + if (argc >= argv_size) + { + argv_size *= 2; + argv = xrealloc (argv, argv_size * sizeof (*argv)); + } + + argv[argc++] = copy_string (arg_start, p - arg_start); + } + + p = consume_improper_spaces (p, body); + + /* Consume the comma, if present. */ + if (*p == ',') + { + p++; + + p = consume_improper_spaces (p, body); + } + } + + if (*p == ')') + { + p++; + + if (*p == ' ') + /* Perfectly formed definition, no complaints. */ + macro_define_function (file, line, name, + argc, (const char **) argv, + p + 1); + else if (*p == '\0') + { + /* Complain, but do define it. */ + complain (&dwarf2_macro_malformed_definition, body); + macro_define_function (file, line, name, + argc, (const char **) argv, + p); + } + else + /* Just complain. */ + complain (&dwarf2_macro_malformed_definition, body); + } + else + /* Just complain. */ + complain (&dwarf2_macro_malformed_definition, body); + + xfree (name); + { + int i; + + for (i = 0; i < argc; i++) + xfree (argv[i]); + } + xfree (argv); + } + else + complain (&dwarf2_macro_malformed_definition, body); +} + + +static void +dwarf_decode_macros (struct line_header *lh, unsigned int offset, + char *comp_dir, bfd *abfd, + const struct comp_unit_head *cu_header, + struct objfile *objfile) +{ + char *mac_ptr, *mac_end; + struct macro_source_file *current_file = 0; + + if (dwarf_macinfo_buffer == NULL) + { + complain (&dwarf2_missing_macinfo_section); + return; + } + + mac_ptr = dwarf_macinfo_buffer + offset; + mac_end = dwarf_macinfo_buffer + dwarf_macinfo_size; + + for (;;) + { + enum dwarf_macinfo_record_type macinfo_type; + + /* Do we at least have room for a macinfo type byte? */ + if (mac_ptr >= mac_end) + { + complain (&dwarf2_macros_too_long); + return; + } + + macinfo_type = read_1_byte (abfd, mac_ptr); + mac_ptr++; + + switch (macinfo_type) + { + /* A zero macinfo type indicates the end of the macro + information. */ + case 0: + return; + + case DW_MACINFO_define: + case DW_MACINFO_undef: + { + int bytes_read; + int line; + char *body; + + line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); + mac_ptr += bytes_read; + body = read_string (abfd, mac_ptr, &bytes_read); + mac_ptr += bytes_read; + + if (! current_file) + complain (&dwarf2_macro_outside_file, + macinfo_type == DW_MACINFO_define ? "definition" : + macinfo_type == DW_MACINFO_undef ? "undefinition" : + "something-or-other", + body); + else + { + if (macinfo_type == DW_MACINFO_define) + parse_macro_definition (current_file, line, body); + else if (macinfo_type == DW_MACINFO_undef) + macro_undef (current_file, line, body); + } + } + break; + + case DW_MACINFO_start_file: + { + int bytes_read; + int line, file; + + line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); + mac_ptr += bytes_read; + file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); + mac_ptr += bytes_read; + + current_file = macro_start_file (file, line, + current_file, comp_dir, + lh, objfile); + } + break; + + case DW_MACINFO_end_file: + if (! current_file) + complain (&dwarf2_macro_unmatched_end_file); + else + { + current_file = current_file->included_by; + if (! current_file) + { + enum dwarf_macinfo_record_type next_type; + + /* GCC circa March 2002 doesn't produce the zero + type byte marking the end of the compilation + unit. Complain if it's not there, but exit no + matter what. */ + + /* Do we at least have room for a macinfo type byte? */ + if (mac_ptr >= mac_end) + { + complain (&dwarf2_macros_too_long); + return; + } + + /* We don't increment mac_ptr here, so this is just + a look-ahead. */ + next_type = read_1_byte (abfd, mac_ptr); + if (next_type != 0) + complain (&dwarf2_macros_not_terminated); + + return; + } + } + break; + + case DW_MACINFO_vendor_ext: + { + int bytes_read; + int constant; + char *string; + + constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); + mac_ptr += bytes_read; + string = read_string (abfd, mac_ptr, &bytes_read); + mac_ptr += bytes_read; + + /* We don't recognize any vendor extensions. */ + } + break; + } + } +} + +/* Check if the attribute's form is a DW_FORM_block* + if so return true else false. */ +static int +attr_form_is_block (struct attribute *attr) +{ + return (attr == NULL ? 0 : + attr->form == DW_FORM_block1 + || attr->form == DW_FORM_block2 + || attr->form == DW_FORM_block4 + || attr->form == DW_FORM_block); +} |