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author | Stan Shebs <shebs@codesourcery.com> | 1999-04-16 01:34:07 +0000 |
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committer | Stan Shebs <shebs@codesourcery.com> | 1999-04-16 01:34:07 +0000 |
commit | 071ea11e85eb9d529cc5eb3d35f6247466a21b99 (patch) | |
tree | 5deda65b8d7b04d1f4cbc534c3206d328e1267ec /gdb/coffread.c | |
parent | 1730ec6b1848f0f32154277f788fb29f88d8475b (diff) | |
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Initial creation of sourceware repository
Diffstat (limited to 'gdb/coffread.c')
-rw-r--r-- | gdb/coffread.c | 2255 |
1 files changed, 0 insertions, 2255 deletions
diff --git a/gdb/coffread.c b/gdb/coffread.c deleted file mode 100644 index 04ca188..0000000 --- a/gdb/coffread.c +++ /dev/null @@ -1,2255 +0,0 @@ -/* Read coff symbol tables and convert to internal format, for GDB. - Copyright 1987, 88, 89, 90, 91, 92, 93, 94, 96, 97, 1998 - Free Software Foundation, Inc. - Contributed by David D. Johnson, Brown University (ddj@cs.brown.edu). - -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 "symtab.h" -#include "gdbtypes.h" -#include "demangle.h" -#include "breakpoint.h" - -#include "bfd.h" -#include "obstack.h" - -#include "gdb_string.h" -#include <ctype.h> - -#include "coff/internal.h" /* Internal format of COFF symbols in BFD */ -#include "libcoff.h" /* FIXME secret internal data from BFD */ - -#include "symfile.h" -#include "objfiles.h" -#include "buildsym.h" -#include "gdb-stabs.h" -#include "stabsread.h" -#include "complaints.h" -#include "target.h" - -struct coff_symfile_info { - file_ptr min_lineno_offset; /* Where in file lowest line#s are */ - file_ptr max_lineno_offset; /* 1+last byte of line#s in file */ - - CORE_ADDR textaddr; /* Addr of .text section. */ - unsigned int textsize; /* Size of .text section. */ - struct stab_section_list *stabsects; /* .stab sections. */ - asection *stabstrsect; /* Section pointer for .stab section */ - char *stabstrdata; -}; - -/* Translate an external name string into a user-visible name. */ -#define EXTERNAL_NAME(string, abfd) \ - (string[0] == bfd_get_symbol_leading_char(abfd)? string+1: string) - -/* To be an sdb debug type, type must have at least a basic or primary - derived type. Using this rather than checking against T_NULL is - said to prevent core dumps if we try to operate on Michael Bloom - dbx-in-coff file. */ - -#define SDB_TYPE(type) (BTYPE(type) | (type & N_TMASK)) - -/* Convert from an sdb register number to an internal gdb register number. - This should be defined in tm.h, if REGISTER_NAMES is not set up - to map one to one onto the sdb register numbers. */ - -#ifndef SDB_REG_TO_REGNUM -# define SDB_REG_TO_REGNUM(value) (value) -#endif - -/* Core address of start and end of text of current source file. - This comes from a ".text" symbol where x_nlinno > 0. */ - -static CORE_ADDR current_source_start_addr; -static CORE_ADDR current_source_end_addr; - -/* The addresses of the symbol table stream and number of symbols - of the object file we are reading (as copied into core). */ - -static bfd *nlist_bfd_global; -static int nlist_nsyms_global; - -/* Vector of line number information. */ - -static struct linetable *line_vector; - -/* Index of next entry to go in line_vector_index. */ - -static int line_vector_index; - -/* Last line number recorded in the line vector. */ - -static int prev_line_number; - -/* Number of elements allocated for line_vector currently. */ - -static int line_vector_length; - -/* Pointers to scratch storage, used for reading raw symbols and auxents. */ - -static char *temp_sym; -static char *temp_aux; - -/* Local variables that hold the shift and mask values for the - COFF file that we are currently reading. These come back to us - from BFD, and are referenced by their macro names, as well as - internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF - macros from include/coff/internal.h . */ - -static unsigned local_n_btmask; -static unsigned local_n_btshft; -static unsigned local_n_tmask; -static unsigned local_n_tshift; - -#define N_BTMASK local_n_btmask -#define N_BTSHFT local_n_btshft -#define N_TMASK local_n_tmask -#define N_TSHIFT local_n_tshift - -/* Local variables that hold the sizes in the file of various COFF structures. - (We only need to know this to read them from the file -- BFD will then - translate the data in them, into `internal_xxx' structs in the right - byte order, alignment, etc.) */ - -static unsigned local_linesz; -static unsigned local_symesz; -static unsigned local_auxesz; - -/* This is set if this is a PE format file. */ - -static int pe_file; - -/* Chain of typedefs of pointers to empty struct/union types. - They are chained thru the SYMBOL_VALUE_CHAIN. */ - -static struct symbol *opaque_type_chain[HASHSIZE]; - -/* Complaints about various problems in the file being read */ - -struct complaint ef_complaint = - {"Unmatched .ef symbol(s) ignored starting at symnum %d", 0, 0}; - -struct complaint ef_stack_complaint = - {"`.ef' symbol without matching `.bf' symbol ignored starting at symnum %d", 0, 0}; - -struct complaint eb_stack_complaint = - {"`.eb' symbol without matching `.bb' symbol ignored starting at symnum %d", 0, 0}; - -struct complaint bf_no_aux_complaint = - {"`.bf' symbol %d has no aux entry", 0, 0}; - -struct complaint ef_no_aux_complaint = - {"`.ef' symbol %d has no aux entry", 0, 0}; - -struct complaint lineno_complaint = - {"Line number pointer %d lower than start of line numbers", 0, 0}; - -struct complaint unexpected_type_complaint = - {"Unexpected type for symbol %s", 0, 0}; - -struct complaint bad_sclass_complaint = - {"Bad n_sclass for symbol %s", 0, 0}; - -struct complaint misordered_blocks_complaint = - {"Blocks out of order at address %x", 0, 0}; - -struct complaint tagndx_bad_complaint = - {"Symbol table entry for %s has bad tagndx value", 0, 0}; - -struct complaint eb_complaint = - {"Mismatched .eb symbol ignored starting at symnum %d", 0, 0}; - -/* Simplified internal version of coff symbol table information */ - -struct coff_symbol { - char *c_name; - int c_symnum; /* symbol number of this entry */ - int c_naux; /* 0 if syment only, 1 if syment + auxent, etc */ - long c_value; - int c_sclass; - int c_secnum; - unsigned int c_type; -}; - -static struct type *coff_read_struct_type PARAMS ((int, int, int)); - -static struct type *decode_base_type PARAMS ((struct coff_symbol *, - unsigned int, - union internal_auxent *)); - -static struct type *decode_type PARAMS ((struct coff_symbol *, unsigned int, - union internal_auxent *)); - -static struct type *decode_function_type PARAMS ((struct coff_symbol *, - unsigned int, - union internal_auxent *)); - -static struct type *coff_read_enum_type PARAMS ((int, int, int)); - -static struct symbol *process_coff_symbol PARAMS ((struct coff_symbol *, - union internal_auxent *, - struct section_offsets *, - struct objfile *)); - -static void patch_opaque_types PARAMS ((struct symtab *)); - -static void patch_type PARAMS ((struct type *, struct type *)); - -static void enter_linenos PARAMS ((long, int, int, struct section_offsets *)); - -static void free_linetab PARAMS ((void)); - -static int init_lineno PARAMS ((bfd *, long, int)); - -static char *getsymname PARAMS ((struct internal_syment *)); - -static char *coff_getfilename PARAMS ((union internal_auxent *)); - -static void free_stringtab PARAMS ((void)); - -static int init_stringtab PARAMS ((bfd *, long)); - -static void read_one_sym PARAMS ((struct coff_symbol *, - struct internal_syment *, - union internal_auxent *)); - -static void coff_symtab_read PARAMS ((long, int, struct section_offsets *, - struct objfile *)); - -static void find_linenos PARAMS ((bfd *, sec_ptr, PTR)); - -static void coff_symfile_init PARAMS ((struct objfile *)); - -static void coff_new_init PARAMS ((struct objfile *)); - -static void coff_symfile_read PARAMS ((struct objfile *, - struct section_offsets *, int)); - -static void coff_symfile_finish PARAMS ((struct objfile *)); - -static void record_minimal_symbol PARAMS ((char *, CORE_ADDR, - enum minimal_symbol_type, - struct objfile *)); - -static void coff_end_symtab PARAMS ((struct objfile *)); - -static void complete_symtab PARAMS ((char *, CORE_ADDR, unsigned int)); - -static void coff_start_symtab PARAMS ((char *)); - -static void coff_record_line PARAMS ((int, CORE_ADDR)); - -static struct type *coff_alloc_type PARAMS ((int)); - -static struct type **coff_lookup_type PARAMS ((int)); - -static void coff_locate_sections PARAMS ((bfd *, asection *, PTR)); - -/* We are called once per section from coff_symfile_read. We - need to examine each section we are passed, check to see - if it is something we are interested in processing, and - if so, stash away some access information for the section. - - FIXME: The section names should not be hardwired strings (what - should they be? I don't think most object file formats have enough - section flags to specify what kind of debug section it is - -kingdon). */ - -static void -coff_locate_sections (abfd, sectp, csip) - bfd *abfd; - asection *sectp; - PTR csip; -{ - register struct coff_symfile_info *csi; - const char *name; - - csi = (struct coff_symfile_info *) csip; - name = bfd_get_section_name (abfd, sectp); - if (STREQ (name, ".text")) - { - csi->textaddr = bfd_section_vma (abfd, sectp); - csi->textsize += bfd_section_size (abfd, sectp); - } - else if (strncmp (name, ".text", sizeof ".text" - 1) == 0) - { - csi->textsize += bfd_section_size (abfd, sectp); - } - else if (STREQ (name, ".stabstr")) - { - csi->stabstrsect = sectp; - } - else if (strncmp (name, ".stab", sizeof ".stab" - 1) == 0) - { - const char *s; - - /* We can have multiple .stab sections if linked with - --split-by-reloc. */ - for (s = name + sizeof ".stab" - 1; *s != '\0'; s++) - if (! isdigit (*s)) - break; - if (*s == '\0') - { - struct stab_section_list *n, **pn; - - n = ((struct stab_section_list *) - xmalloc (sizeof (struct stab_section_list))); - n->section = sectp; - n->next = NULL; - for (pn = &csi->stabsects; *pn != NULL; pn = &(*pn)->next) - ; - *pn = n; - - /* This will be run after coffstab_build_psymtabs is called - in coff_symfile_read, at which point we no longer need - the information. */ - make_cleanup (free, n); - } - } -} - -/* Return the section_offsets* that CS points to. */ -static int cs_to_section PARAMS ((struct coff_symbol *, struct objfile *)); - -struct find_targ_sec_arg { - int targ_index; - asection **resultp; -}; - -static void find_targ_sec PARAMS ((bfd *, asection *, void *)); - -static void find_targ_sec (abfd, sect, obj) - bfd *abfd; - asection *sect; - PTR obj; -{ - struct find_targ_sec_arg *args = (struct find_targ_sec_arg *)obj; - if (sect->target_index == args->targ_index) - *args->resultp = sect; -} - -/* Return the section number (SECT_OFF_*) that CS points to. */ -static int -cs_to_section (cs, objfile) - struct coff_symbol *cs; - struct objfile *objfile; -{ - asection *sect = NULL; - struct find_targ_sec_arg args; - int off = SECT_OFF_TEXT; - - args.targ_index = cs->c_secnum; - args.resultp = § - bfd_map_over_sections (objfile->obfd, find_targ_sec, &args); - if (sect != NULL) - { - /* This is the section. Figure out what SECT_OFF_* code it is. */ - if (bfd_get_section_flags (abfd, sect) & SEC_CODE) - off = SECT_OFF_TEXT; - else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD) - off = SECT_OFF_DATA; - else - off = SECT_OFF_BSS; - } - return off; -} - -/* Return the address of the section of a COFF symbol. */ - -static CORE_ADDR cs_section_address PARAMS ((struct coff_symbol *, bfd *)); - -static CORE_ADDR -cs_section_address (cs, abfd) - struct coff_symbol *cs; - bfd *abfd; -{ - asection *sect = NULL; - struct find_targ_sec_arg args; - CORE_ADDR addr = 0; - - args.targ_index = cs->c_secnum; - args.resultp = § - bfd_map_over_sections (abfd, find_targ_sec, &args); - if (sect != NULL) - addr = bfd_get_section_vma (objfile->obfd, sect); - return addr; -} - -/* Look up a coff type-number index. Return the address of the slot - where the type for that index is stored. - The type-number is in INDEX. - - This can be used for finding the type associated with that index - or for associating a new type with the index. */ - -static struct type ** -coff_lookup_type (index) - register int index; -{ - if (index >= type_vector_length) - { - int old_vector_length = type_vector_length; - - type_vector_length *= 2; - if (index /* is still */ >= type_vector_length) - type_vector_length = index * 2; - - type_vector = (struct type **) - xrealloc ((char *) type_vector, - type_vector_length * sizeof (struct type *)); - memset (&type_vector[old_vector_length], 0, - (type_vector_length - old_vector_length) * sizeof(struct type *)); - } - return &type_vector[index]; -} - -/* Make sure there is a type allocated for type number index - and return the type object. - This can create an empty (zeroed) type object. */ - -static struct type * -coff_alloc_type (index) - int index; -{ - register struct type **type_addr = coff_lookup_type (index); - register struct type *type = *type_addr; - - /* If we are referring to a type not known at all yet, - allocate an empty type for it. - We will fill it in later if we find out how. */ - if (type == NULL) - { - type = alloc_type (current_objfile); - *type_addr = type; - } - return type; -} - -/* Record a line number entry for line LINE at address PC. - FIXME: Use record_line instead. */ - -static void -coff_record_line (line, pc) - int line; - CORE_ADDR pc; -{ - struct linetable_entry *e; - /* Make sure line vector is big enough. */ - - if (line_vector_index + 2 >= line_vector_length) - { - line_vector_length *= 2; - line_vector = (struct linetable *) - xrealloc ((char *) line_vector, sizeof (struct linetable) - + (line_vector_length - * sizeof (struct linetable_entry))); - } - - e = line_vector->item + line_vector_index++; - e->line = line; e->pc = pc; -} - -/* Start a new symtab for a new source file. - This is called when a COFF ".file" symbol is seen; - it indicates the start of data for one original source file. */ - -static void -coff_start_symtab (name) - char *name; -{ - start_symtab ( - /* We fill in the filename later. start_symtab puts - this pointer into last_source_file and we put it in - subfiles->name, which end_symtab frees; that's why - it must be malloc'd. */ - savestring (name, strlen(name)), - /* We never know the directory name for COFF. */ - NULL, - /* The start address is irrelevant, since we set - last_source_start_addr in coff_end_symtab. */ - 0); - record_debugformat ("COFF"); - - /* Initialize the source file line number information for this file. */ - - if (line_vector) /* Unlikely, but maybe possible? */ - free ((PTR)line_vector); - line_vector_index = 0; - line_vector_length = 1000; - prev_line_number = -2; /* Force first line number to be explicit */ - line_vector = (struct linetable *) - xmalloc (sizeof (struct linetable) - + line_vector_length * sizeof (struct linetable_entry)); -} - -/* Save the vital information from when starting to read a file, - for use when closing off the current file. - NAME is the file name the symbols came from, START_ADDR is the first - text address for the file, and SIZE is the number of bytes of text. */ - -static void -complete_symtab (name, start_addr, size) - char *name; - CORE_ADDR start_addr; - unsigned int size; -{ - if (last_source_file != NULL) - free (last_source_file); - last_source_file = savestring (name, strlen (name)); - current_source_start_addr = start_addr; - current_source_end_addr = start_addr + size; - - if (current_objfile -> ei.entry_point >= current_source_start_addr && - current_objfile -> ei.entry_point < current_source_end_addr) - { - current_objfile -> ei.entry_file_lowpc = current_source_start_addr; - current_objfile -> ei.entry_file_highpc = current_source_end_addr; - } -} - -/* Finish the symbol definitions for one main source file, - close off all the lexical contexts for that file - (creating struct block's for them), then make the - struct symtab for that file and put it in the list of all such. */ - -static void -coff_end_symtab (objfile) - struct objfile *objfile; -{ - struct symtab *symtab; - - last_source_start_addr = current_source_start_addr; - - /* For no good reason, this file stores the number of entries in a - separate variable instead of in line_vector->nitems. Fix it. */ - if (line_vector) - line_vector->nitems = line_vector_index; - - /* For COFF, we only have one subfile, so we can just look at - subfiles and not worry about there being other elements in the - chain. We fill in various fields now because we didn't know them - before (or because doing it now is simply an artifact of how this - file used to be written). */ - subfiles->line_vector = line_vector; - - symtab = end_symtab (current_source_end_addr, objfile, 0); - - if (symtab != NULL) - free_named_symtabs (symtab->filename); - - /* Reinitialize for beginning of new file. */ - line_vector = 0; - line_vector_length = -1; - last_source_file = NULL; -} - -static void -record_minimal_symbol (name, address, type, objfile) - char *name; - CORE_ADDR address; - enum minimal_symbol_type type; - struct objfile *objfile; -{ - /* We don't want TDESC entry points in the minimal symbol table */ - if (name[0] == '@') return; - - prim_record_minimal_symbol (name, address, type, objfile); -} - -/* coff_symfile_init () - is the coff-specific initialization routine for reading symbols. - It is passed a struct objfile which contains, among other things, - the BFD for the file whose symbols are being read, and a slot for - a pointer to "private data" which we fill with cookies and other - treats for coff_symfile_read (). - - We will only be called if this is a COFF or COFF-like file. - BFD handles figuring out the format of the file, and code in symtab.c - uses BFD's determination to vector to us. - - The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */ - -static void -coff_symfile_init (objfile) - struct objfile *objfile; -{ - /* Allocate struct to keep track of stab reading. */ - objfile->sym_stab_info = (struct dbx_symfile_info *) - xmmalloc (objfile->md, sizeof (struct dbx_symfile_info)); - - memset ((PTR) objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info)); - - /* Allocate struct to keep track of the symfile */ - objfile->sym_private = xmmalloc (objfile->md, - sizeof (struct coff_symfile_info)); - - memset (objfile->sym_private, 0, sizeof (struct coff_symfile_info)); - - /* COFF objects may be reordered, so set OBJF_REORDERED. If we - find this causes a significant slowdown in gdb then we could - set it in the debug symbol readers only when necessary. */ - objfile->flags |= OBJF_REORDERED; - - init_entry_point_info (objfile); -} - -/* This function is called for every section; it finds the outer limits - of the line table (minimum and maximum file offset) so that the - mainline code can read the whole thing for efficiency. */ - -/* ARGSUSED */ -static void -find_linenos (abfd, asect, vpinfo) - bfd *abfd; - sec_ptr asect; - PTR vpinfo; -{ - struct coff_symfile_info *info; - int size, count; - file_ptr offset, maxoff; - -/* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ - count = asect->lineno_count; -/* End of warning */ - - if (count == 0) - return; - size = count * local_linesz; - - info = (struct coff_symfile_info *)vpinfo; -/* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ - offset = asect->line_filepos; -/* End of warning */ - - if (offset < info->min_lineno_offset || info->min_lineno_offset == 0) - info->min_lineno_offset = offset; - - maxoff = offset + size; - if (maxoff > info->max_lineno_offset) - info->max_lineno_offset = maxoff; -} - - -/* The BFD for this file -- only good while we're actively reading - symbols into a psymtab or a symtab. */ - -static bfd *symfile_bfd; - -/* Read a symbol file, after initialization by coff_symfile_init. */ - -/* ARGSUSED */ -static void -coff_symfile_read (objfile, section_offsets, mainline) - struct objfile *objfile; - struct section_offsets *section_offsets; - int mainline; -{ - struct coff_symfile_info *info; - struct dbx_symfile_info *dbxinfo; - bfd *abfd = objfile->obfd; - coff_data_type *cdata = coff_data (abfd); - char *name = bfd_get_filename (abfd); - register int val; - int num_symbols; - int symtab_offset; - int stringtab_offset; - struct cleanup *back_to; - int stabstrsize; - - info = (struct coff_symfile_info *) objfile -> sym_private; - dbxinfo = objfile->sym_stab_info; - symfile_bfd = abfd; /* Kludge for swap routines */ - -/* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ - num_symbols = bfd_get_symcount (abfd); /* How many syms */ - symtab_offset = cdata->sym_filepos; /* Symbol table file offset */ - stringtab_offset = symtab_offset + /* String table file offset */ - num_symbols * cdata->local_symesz; - - /* Set a few file-statics that give us specific information about - the particular COFF file format we're reading. */ - local_linesz = cdata->local_linesz; - local_n_btmask = cdata->local_n_btmask; - local_n_btshft = cdata->local_n_btshft; - local_n_tmask = cdata->local_n_tmask; - local_n_tshift = cdata->local_n_tshift; - local_linesz = cdata->local_linesz; - local_symesz = cdata->local_symesz; - local_auxesz = cdata->local_auxesz; - - /* Allocate space for raw symbol and aux entries, based on their - space requirements as reported by BFD. */ - temp_sym = (char *) xmalloc - (cdata->local_symesz + cdata->local_auxesz); - temp_aux = temp_sym + cdata->local_symesz; - back_to = make_cleanup ((make_cleanup_func) free_current_contents, &temp_sym); - - /* We need to know whether this is a PE file, because in PE files, - unlike standard COFF files, symbol values are stored as offsets - from the section address, rather than as absolute addresses. - FIXME: We should use BFD to read the symbol table, and thus avoid - this problem. */ - pe_file = strncmp (bfd_get_target (objfile->obfd), "pe", 2) == 0; - -/* End of warning */ - - /* Read the line number table, all at once. */ - info->min_lineno_offset = 0; - info->max_lineno_offset = 0; - bfd_map_over_sections (abfd, find_linenos, (PTR) info); - - make_cleanup ((make_cleanup_func) free_linetab, 0); - val = init_lineno (abfd, info->min_lineno_offset, - info->max_lineno_offset - info->min_lineno_offset); - if (val < 0) - error ("\"%s\": error reading line numbers\n", name); - - /* Now read the string table, all at once. */ - - make_cleanup ((make_cleanup_func) free_stringtab, 0); - val = init_stringtab (abfd, stringtab_offset); - if (val < 0) - error ("\"%s\": can't get string table", name); - - init_minimal_symbol_collection (); - make_cleanup ((make_cleanup_func) discard_minimal_symbols, 0); - - /* Now that the executable file is positioned at symbol table, - process it and define symbols accordingly. */ - - coff_symtab_read ((long) symtab_offset, num_symbols, section_offsets, - objfile); - - /* Sort symbols alphabetically within each block. */ - - { - struct symtab *s; - - for (s = objfile -> symtabs; s != NULL; s = s -> next) - sort_symtab_syms (s); - } - - /* Install any minimal symbols that have been collected as the current - minimal symbols for this objfile. */ - - install_minimal_symbols (objfile); - - bfd_map_over_sections (abfd, coff_locate_sections, (PTR) info); - - if (info->stabsects) - { - /* FIXME: dubious. Why can't we use something normal like - bfd_get_section_contents? */ - bfd_seek (abfd, abfd->where, 0); - - stabstrsize = bfd_section_size (abfd, info->stabstrsect); - - coffstab_build_psymtabs (objfile, - section_offsets, - mainline, - info->textaddr, info->textsize, - info->stabsects, - info->stabstrsect->filepos, stabstrsize); - } - - do_cleanups (back_to); -} - -static void -coff_new_init (ignore) - struct objfile *ignore; -{ -} - -/* Perform any local cleanups required when we are done with a particular - objfile. I.E, we are in the process of discarding all symbol information - for an objfile, freeing up all memory held for it, and unlinking the - objfile struct from the global list of known objfiles. */ - -static void -coff_symfile_finish (objfile) - struct objfile *objfile; -{ - if (objfile -> sym_private != NULL) - { - mfree (objfile -> md, objfile -> sym_private); - } -} - - -/* Given pointers to a symbol table in coff style exec file, - analyze them and create struct symtab's describing the symbols. - NSYMS is the number of symbols in the symbol table. - We read them one at a time using read_one_sym (). */ - -static void -coff_symtab_read (symtab_offset, nsyms, section_offsets, objfile) - long symtab_offset; - int nsyms; - struct section_offsets *section_offsets; - struct objfile *objfile; -{ - register struct context_stack *new; - struct coff_symbol coff_symbol; - register struct coff_symbol *cs = &coff_symbol; - static struct internal_syment main_sym; - static union internal_auxent main_aux; - struct coff_symbol fcn_cs_saved; - static struct internal_syment fcn_sym_saved; - static union internal_auxent fcn_aux_saved; - struct symtab *s; - /* A .file is open. */ - int in_source_file = 0; - int next_file_symnum = -1; - /* Name of the current file. */ - char *filestring = ""; - int depth = 0; - int fcn_first_line = 0; - int fcn_last_line = 0; - int fcn_start_addr = 0; - long fcn_line_ptr = 0; - int val; - CORE_ADDR tmpaddr; - - /* Work around a stdio bug in SunOS4.1.1 (this makes me nervous.... - it's hard to know I've really worked around it. The fix should be - harmless, anyway). The symptom of the bug is that the first - fread (in read_one_sym), will (in my example) actually get data - from file offset 268, when the fseek was to 264 (and ftell shows - 264). This causes all hell to break loose. I was unable to - reproduce this on a short test program which operated on the same - file, performing (I think) the same sequence of operations. - - It stopped happening when I put in this (former) rewind(). - - FIXME: Find out if this has been reported to Sun, whether it has - been fixed in a later release, etc. */ - - bfd_seek (objfile->obfd, 0, 0); - - /* Position to read the symbol table. */ - val = bfd_seek (objfile->obfd, (long) symtab_offset, 0); - if (val < 0) - perror_with_name (objfile->name); - - current_objfile = objfile; - nlist_bfd_global = objfile->obfd; - nlist_nsyms_global = nsyms; - last_source_file = NULL; - memset (opaque_type_chain, 0, sizeof opaque_type_chain); - - if (type_vector) /* Get rid of previous one */ - free ((PTR) type_vector); - type_vector_length = 160; - type_vector = (struct type **) - xmalloc (type_vector_length * sizeof (struct type *)); - memset (type_vector, 0, type_vector_length * sizeof (struct type *)); - - coff_start_symtab (""); - - symnum = 0; - while (symnum < nsyms) - { - QUIT; /* Make this command interruptable. */ - - read_one_sym (cs, &main_sym, &main_aux); - - if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE) - { - if (last_source_file) - coff_end_symtab (objfile); - - coff_start_symtab ("_globals_"); - complete_symtab ("_globals_", 0, 0); - /* done with all files, everything from here on out is globals */ - } - - /* Special case for file with type declarations only, no text. */ - if (!last_source_file && SDB_TYPE (cs->c_type) - && cs->c_secnum == N_DEBUG) - complete_symtab (filestring, 0, 0); - - /* Typedefs should not be treated as symbol definitions. */ - if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF) - { - /* Record all functions -- external and static -- in minsyms. */ - tmpaddr = cs->c_value + ANOFFSET (section_offsets, SECT_OFF_TEXT); - record_minimal_symbol (cs->c_name, tmpaddr, mst_text, objfile); - - fcn_line_ptr = main_aux.x_sym.x_fcnary.x_fcn.x_lnnoptr; - fcn_start_addr = tmpaddr; - fcn_cs_saved = *cs; - fcn_sym_saved = main_sym; - fcn_aux_saved = main_aux; - continue; - } - - switch (cs->c_sclass) - { - case C_EFCN: - case C_EXTDEF: - case C_ULABEL: - case C_USTATIC: - case C_LINE: - case C_ALIAS: - case C_HIDDEN: - complain (&bad_sclass_complaint, cs->c_name); - break; - - case C_FILE: - /* c_value field contains symnum of next .file entry in table - or symnum of first global after last .file. */ - next_file_symnum = cs->c_value; - if (cs->c_naux > 0) - filestring = coff_getfilename (&main_aux); - else - filestring = ""; - - /* Complete symbol table for last object file - containing debugging information. */ - if (last_source_file) - { - coff_end_symtab (objfile); - coff_start_symtab (filestring); - } - in_source_file = 1; - break; - - /* C_LABEL is used for labels and static functions. Including - it here allows gdb to see static functions when no debug - info is available. */ - case C_LABEL: - /* However, labels within a function can make weird backtraces, - so filter them out (from phdm@macquel.be). */ - if (within_function) - break; - case C_STAT: - case C_THUMBLABEL: - case C_THUMBSTAT: - case C_THUMBSTATFUNC: - if (cs->c_name[0] == '.') - { - if (STREQ (cs->c_name, ".text")) { - /* FIXME: don't wire in ".text" as section name - or symbol name! */ - /* Check for in_source_file deals with case of - a file with debugging symbols - followed by a later file with no symbols. */ - if (in_source_file) - complete_symtab (filestring, - cs->c_value + ANOFFSET (section_offsets, SECT_OFF_TEXT), - main_aux.x_scn.x_scnlen); - in_source_file = 0; - } - /* flush rest of '.' symbols */ - break; - } - else if (!SDB_TYPE (cs->c_type) - && cs->c_name[0] == 'L' - && (strncmp (cs->c_name, "LI%", 3) == 0 - || strncmp (cs->c_name, "LF%", 3) == 0 - || strncmp (cs->c_name,"LC%",3) == 0 - || strncmp (cs->c_name,"LP%",3) == 0 - || strncmp (cs->c_name,"LPB%",4) == 0 - || strncmp (cs->c_name,"LBB%",4) == 0 - || strncmp (cs->c_name,"LBE%",4) == 0 - || strncmp (cs->c_name,"LPBX%",5) == 0)) - /* At least on a 3b1, gcc generates swbeg and string labels - that look like this. Ignore them. */ - break; - /* fall in for static symbols that don't start with '.' */ - case C_THUMBEXT: - case C_THUMBEXTFUNC: - case C_EXT: - { - /* Record it in the minimal symbols regardless of - SDB_TYPE. This parallels what we do for other debug - formats, and probably is needed to make - print_address_symbolic work right without the (now - gone) "set fast-symbolic-addr off" kludge. */ - - /* FIXME: should use mst_abs, and not relocate, if absolute. */ - enum minimal_symbol_type ms_type; - int sec; - - if (cs->c_secnum == N_UNDEF) - { - /* This is a common symbol. See if the target - environment knows where it has been relocated to. */ - CORE_ADDR reladdr; - if (target_lookup_symbol (cs->c_name, &reladdr)) - { - /* Error in lookup; ignore symbol. */ - break; - } - tmpaddr = reladdr; - /* The address has already been relocated; make sure that - objfile_relocate doesn't relocate it again. */ - sec = -2; - ms_type = cs->c_sclass == C_EXT - || cs->c_sclass == C_THUMBEXT ? - mst_bss : mst_file_bss; - } - else - { - sec = cs_to_section (cs, objfile); - tmpaddr = cs->c_value; - if (cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXTFUNC - || cs->c_sclass == C_THUMBEXT) - tmpaddr += ANOFFSET (section_offsets, sec); - - switch (sec) - { - case SECT_OFF_TEXT: - case SECT_OFF_RODATA: - ms_type = - cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXTFUNC - || cs->c_sclass == C_THUMBEXT ? - mst_text : mst_file_text; -#ifdef SMASH_TEXT_ADDRESS - if (tmpaddr & 1) /* FIXME: delete this line */ - SMASH_TEXT_ADDRESS (tmpaddr); -#endif - break; - case SECT_OFF_DATA: - ms_type = - cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT ? - mst_data : mst_file_data; - break; - case SECT_OFF_BSS: - ms_type = - cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT ? - mst_data : mst_file_data; - break; - default: - ms_type = mst_unknown; - break; - } - } - - if (cs->c_name[0] != '@' /* Skip tdesc symbols */) - { - struct minimal_symbol *msym; - - msym = prim_record_minimal_symbol_and_info - (cs->c_name, tmpaddr, ms_type, (char *)cs->c_sclass, sec, - NULL, objfile); -#ifdef COFF_MAKE_MSYMBOL_SPECIAL - if(msym) - COFF_MAKE_MSYMBOL_SPECIAL(cs->c_sclass, msym); -#endif - } - if (SDB_TYPE (cs->c_type)) - { - struct symbol *sym; - sym = process_coff_symbol - (cs, &main_aux, section_offsets, objfile); - SYMBOL_VALUE (sym) = tmpaddr; - SYMBOL_SECTION (sym) = sec; - } - } - break; - - case C_FCN: - if (STREQ (cs->c_name, ".bf")) - { - within_function = 1; - - /* value contains address of first non-init type code */ - /* main_aux.x_sym.x_misc.x_lnsz.x_lnno - contains line number of '{' } */ - if (cs->c_naux != 1) - complain (&bf_no_aux_complaint, cs->c_symnum); - fcn_first_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; - - /* Might want to check that locals are 0 and - context_stack_depth is zero, and complain if not. */ - - depth = 0; - new = push_context (depth, fcn_start_addr); - fcn_cs_saved.c_name = getsymname (&fcn_sym_saved); - new->name = - process_coff_symbol (&fcn_cs_saved, &fcn_aux_saved, - section_offsets, objfile); - } - else if (STREQ (cs->c_name, ".ef")) - { - /* the value of .ef is the address of epilogue code; - not useful for gdb. */ - /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno - contains number of lines to '}' */ - - if (context_stack_depth <= 0) - { /* We attempted to pop an empty context stack */ - complain (&ef_stack_complaint, cs->c_symnum); - within_function = 0; - break; - } - - new = pop_context (); - /* Stack must be empty now. */ - if (context_stack_depth > 0 || new == NULL) - { - complain (&ef_complaint, cs->c_symnum); - within_function = 0; - break; - } - if (cs->c_naux != 1) - { - complain (&ef_no_aux_complaint, cs->c_symnum); - fcn_last_line = 0x7FFFFFFF; - } - else - { - fcn_last_line = main_aux.x_sym.x_misc.x_lnsz.x_lnno; - } - enter_linenos (fcn_line_ptr, fcn_first_line, fcn_last_line, - section_offsets); - - finish_block (new->name, &local_symbols, new->old_blocks, - new->start_addr, -#if defined (FUNCTION_EPILOGUE_SIZE) - /* This macro should be defined only on - machines where the - fcn_aux_saved.x_sym.x_misc.x_fsize - field is always zero. - So use the .bf record information that - points to the epilogue and add the size - of the epilogue. */ - cs->c_value - + FUNCTION_EPILOGUE_SIZE - + ANOFFSET (section_offsets, SECT_OFF_TEXT), -#else - fcn_cs_saved.c_value - + fcn_aux_saved.x_sym.x_misc.x_fsize - + ANOFFSET (section_offsets, SECT_OFF_TEXT), -#endif - objfile - ); - within_function = 0; - } - break; - - case C_BLOCK: - if (STREQ (cs->c_name, ".bb")) - { - tmpaddr = cs->c_value; - tmpaddr += ANOFFSET (section_offsets, SECT_OFF_TEXT); - push_context (++depth, tmpaddr); - } - else if (STREQ (cs->c_name, ".eb")) - { - if (context_stack_depth <= 0) - { /* We attempted to pop an empty context stack */ - complain (&eb_stack_complaint, cs->c_symnum); - break; - } - - new = pop_context (); - if (depth-- != new->depth) - { - complain (&eb_complaint, symnum); - break; - } - if (local_symbols && context_stack_depth > 0) - { - tmpaddr = - cs->c_value + ANOFFSET (section_offsets, SECT_OFF_TEXT); - /* Make a block for the local symbols within. */ - finish_block (0, &local_symbols, new->old_blocks, - new->start_addr, tmpaddr, objfile); - } - /* Now pop locals of block just finished. */ - local_symbols = new->locals; - } - break; - - default: - process_coff_symbol (cs, &main_aux, section_offsets, objfile); - break; - } - } - - if (last_source_file) - coff_end_symtab (objfile); - - /* Patch up any opaque types (references to types that are not defined - in the file where they are referenced, e.g. "struct foo *bar"). */ - ALL_OBJFILE_SYMTABS (objfile, s) - patch_opaque_types (s); - - current_objfile = NULL; -} - -/* Routines for reading headers and symbols from executable. */ - -/* Read the next symbol, swap it, and return it in both internal_syment - form, and coff_symbol form. Also return its first auxent, if any, - in internal_auxent form, and skip any other auxents. */ - -static void -read_one_sym (cs, sym, aux) - register struct coff_symbol *cs; - register struct internal_syment *sym; - register union internal_auxent *aux; -{ - int i; - - cs->c_symnum = symnum; - bfd_read (temp_sym, local_symesz, 1, nlist_bfd_global); - bfd_coff_swap_sym_in (symfile_bfd, temp_sym, (char *)sym); - cs->c_naux = sym->n_numaux & 0xff; - if (cs->c_naux >= 1) - { - bfd_read (temp_aux, local_auxesz, 1, nlist_bfd_global); - bfd_coff_swap_aux_in (symfile_bfd, temp_aux, sym->n_type, sym->n_sclass, - 0, cs->c_naux, (char *)aux); - /* If more than one aux entry, read past it (only the first aux - is important). */ - for (i = 1; i < cs->c_naux; i++) - bfd_read (temp_aux, local_auxesz, 1, nlist_bfd_global); - } - cs->c_name = getsymname (sym); - cs->c_value = sym->n_value; - cs->c_sclass = (sym->n_sclass & 0xff); - cs->c_secnum = sym->n_scnum; - cs->c_type = (unsigned) sym->n_type; - if (!SDB_TYPE (cs->c_type)) - cs->c_type = 0; - -#if 0 - if (cs->c_sclass & 128) - printf("thumb symbol %s, class 0x%x\n", cs->c_name, cs->c_sclass); -#endif - - symnum += 1 + cs->c_naux; - - /* The PE file format stores symbol values as offsets within the - section, rather than as absolute addresses. We correct that - here, if the symbol has an appropriate storage class. FIXME: We - should use BFD to read the symbols, rather than duplicating the - work here. */ - if (pe_file) - { - switch (cs->c_sclass) - { - case C_EXT: - case C_THUMBEXT: - case C_THUMBEXTFUNC: - case C_SECTION: - case C_NT_WEAK: - case C_STAT: - case C_THUMBSTAT: - case C_THUMBSTATFUNC: - case C_LABEL: - case C_THUMBLABEL: - case C_BLOCK: - case C_FCN: - case C_EFCN: - if (cs->c_secnum != 0) - cs->c_value += cs_section_address (cs, symfile_bfd); - break; - } - } -} - -/* Support for string table handling */ - -static char *stringtab = NULL; - -static int -init_stringtab (abfd, offset) - bfd *abfd; - long offset; -{ - long length; - int val; - unsigned char lengthbuf[4]; - - free_stringtab (); - - /* If the file is stripped, the offset might be zero, indicating no - string table. Just return with `stringtab' set to null. */ - if (offset == 0) - return 0; - - if (bfd_seek (abfd, offset, 0) < 0) - return -1; - - val = bfd_read ((char *)lengthbuf, sizeof lengthbuf, 1, abfd); - length = bfd_h_get_32 (symfile_bfd, lengthbuf); - - /* If no string table is needed, then the file may end immediately - after the symbols. Just return with `stringtab' set to null. */ - if (val != sizeof lengthbuf || length < sizeof lengthbuf) - return 0; - - stringtab = (char *) xmalloc (length); - /* This is in target format (probably not very useful, and not currently - used), not host format. */ - memcpy (stringtab, lengthbuf, sizeof lengthbuf); - if (length == sizeof length) /* Empty table -- just the count */ - return 0; - - val = bfd_read (stringtab + sizeof lengthbuf, length - sizeof lengthbuf, 1, abfd); - if (val != length - sizeof lengthbuf || stringtab[length - 1] != '\0') - return -1; - - return 0; -} - -static void -free_stringtab () -{ - if (stringtab) - free (stringtab); - stringtab = NULL; -} - -static char * -getsymname (symbol_entry) - struct internal_syment *symbol_entry; -{ - static char buffer[SYMNMLEN+1]; - char *result; - - if (symbol_entry->_n._n_n._n_zeroes == 0) - { - /* FIXME: Probably should be detecting corrupt symbol files by - seeing whether offset points to within the stringtab. */ - result = stringtab + symbol_entry->_n._n_n._n_offset; - } - else - { - strncpy (buffer, symbol_entry->_n._n_name, SYMNMLEN); - buffer[SYMNMLEN] = '\0'; - result = buffer; - } - return result; -} - -/* Extract the file name from the aux entry of a C_FILE symbol. Return - only the last component of the name. Result is in static storage and - is only good for temporary use. */ - -static char * -coff_getfilename (aux_entry) - union internal_auxent *aux_entry; -{ - static char buffer[BUFSIZ]; - register char *temp; - char *result; - - if (aux_entry->x_file.x_n.x_zeroes == 0) - strcpy (buffer, stringtab + aux_entry->x_file.x_n.x_offset); - else - { - strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN); - buffer[FILNMLEN] = '\0'; - } - result = buffer; - - /* FIXME: We should not be throwing away the information about what - directory. It should go into dirname of the symtab, or some such - place. */ - if ((temp = strrchr (result, '/')) != NULL) - result = temp + 1; - return (result); -} - -/* Support for line number handling. */ - -static char *linetab = NULL; -static long linetab_offset; -static unsigned long linetab_size; - -/* Read in all the line numbers for fast lookups later. Leave them in - external (unswapped) format in memory; we'll swap them as we enter - them into GDB's data structures. */ - -static int -init_lineno (abfd, offset, size) - bfd *abfd; - long offset; - int size; -{ - int val; - - linetab_offset = offset; - linetab_size = size; - - free_linetab(); - - if (size == 0) - return 0; - - if (bfd_seek (abfd, offset, 0) < 0) - return -1; - - /* Allocate the desired table, plus a sentinel */ - linetab = (char *) xmalloc (size + local_linesz); - - val = bfd_read (linetab, size, 1, abfd); - if (val != size) - return -1; - - /* Terminate it with an all-zero sentinel record */ - memset (linetab + size, 0, local_linesz); - - return 0; -} - -static void -free_linetab () -{ - if (linetab) - free (linetab); - linetab = NULL; -} - -#if !defined (L_LNNO32) -#define L_LNNO32(lp) ((lp)->l_lnno) -#endif - -static void -enter_linenos (file_offset, first_line, last_line, section_offsets) - long file_offset; - register int first_line; - register int last_line; - struct section_offsets *section_offsets; -{ - register char *rawptr; - struct internal_lineno lptr; - - if (!linetab) - return ; - if (file_offset < linetab_offset) - { - complain (&lineno_complaint, file_offset); - if (file_offset > linetab_size) /* Too big to be an offset? */ - return; - file_offset += linetab_offset; /* Try reading at that linetab offset */ - } - - rawptr = &linetab[file_offset - linetab_offset]; - - /* skip first line entry for each function */ - rawptr += local_linesz; - /* line numbers start at one for the first line of the function */ - first_line--; - - for (;;) { - bfd_coff_swap_lineno_in (symfile_bfd, rawptr, &lptr); - rawptr += local_linesz; - /* The next function, or the sentinel, will have L_LNNO32 zero; we exit. */ - if (L_LNNO32 (&lptr) && L_LNNO32 (&lptr) <= last_line) - coff_record_line (first_line + L_LNNO32 (&lptr), - lptr.l_addr.l_paddr - + ANOFFSET (section_offsets, SECT_OFF_TEXT)); - else - break; - } -} - -static void -patch_type (type, real_type) - struct type *type; - struct type *real_type; -{ - register struct type *target = TYPE_TARGET_TYPE (type); - register struct type *real_target = TYPE_TARGET_TYPE (real_type); - int field_size = TYPE_NFIELDS (real_target) * sizeof (struct field); - - TYPE_LENGTH (target) = TYPE_LENGTH (real_target); - TYPE_NFIELDS (target) = TYPE_NFIELDS (real_target); - TYPE_FIELDS (target) = (struct field *) TYPE_ALLOC (target, field_size); - - memcpy (TYPE_FIELDS (target), TYPE_FIELDS (real_target), field_size); - - if (TYPE_NAME (real_target)) - { - if (TYPE_NAME (target)) - free (TYPE_NAME (target)); - TYPE_NAME (target) = concat (TYPE_NAME (real_target), NULL); - } -} - -/* Patch up all appropriate typedef symbols in the opaque_type_chains - so that they can be used to print out opaque data structures properly. */ - -static void -patch_opaque_types (s) - struct symtab *s; -{ - register struct block *b; - register int i; - register struct symbol *real_sym; - - /* Go through the per-file symbols only */ - b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK); - for (i = BLOCK_NSYMS (b) - 1; i >= 0; i--) - { - /* Find completed typedefs to use to fix opaque ones. - Remove syms from the chain when their types are stored, - but search the whole chain, as there may be several syms - from different files with the same name. */ - real_sym = BLOCK_SYM (b, i); - if (SYMBOL_CLASS (real_sym) == LOC_TYPEDEF && - SYMBOL_NAMESPACE (real_sym) == VAR_NAMESPACE && - TYPE_CODE (SYMBOL_TYPE (real_sym)) == TYPE_CODE_PTR && - TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym))) != 0) - { - register char *name = SYMBOL_NAME (real_sym); - register int hash = hashname (name); - register struct symbol *sym, *prev; - - prev = 0; - for (sym = opaque_type_chain[hash]; sym;) - { - if (name[0] == SYMBOL_NAME (sym)[0] && - STREQ (name + 1, SYMBOL_NAME (sym) + 1)) - { - if (prev) - { - SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym); - } - else - { - opaque_type_chain[hash] = SYMBOL_VALUE_CHAIN (sym); - } - - patch_type (SYMBOL_TYPE (sym), SYMBOL_TYPE (real_sym)); - - if (prev) - { - sym = SYMBOL_VALUE_CHAIN (prev); - } - else - { - sym = opaque_type_chain[hash]; - } - } - else - { - prev = sym; - sym = SYMBOL_VALUE_CHAIN (sym); - } - } - } - } -} - -static struct symbol * -process_coff_symbol (cs, aux, section_offsets, objfile) - register struct coff_symbol *cs; - register union internal_auxent *aux; - struct section_offsets *section_offsets; - struct objfile *objfile; -{ - register struct symbol *sym - = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, - sizeof (struct symbol)); - char *name; - - memset (sym, 0, sizeof (struct symbol)); - name = cs->c_name; - name = EXTERNAL_NAME (name, objfile->obfd); - SYMBOL_NAME (sym) = obsavestring (name, strlen (name), - &objfile->symbol_obstack); - SYMBOL_LANGUAGE (sym) = language_auto; - SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack); - - /* default assumptions */ - SYMBOL_VALUE (sym) = cs->c_value; - SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; - SYMBOL_SECTION (sym) = cs_to_section (cs, objfile); - - if (ISFCN (cs->c_type)) - { - SYMBOL_VALUE (sym) += ANOFFSET (section_offsets, SECT_OFF_TEXT); - SYMBOL_TYPE(sym) = - lookup_function_type (decode_function_type (cs, cs->c_type, aux)); - - SYMBOL_CLASS (sym) = LOC_BLOCK; - if (cs->c_sclass == C_STAT || cs->c_sclass == C_THUMBSTAT - || cs->c_sclass == C_THUMBSTATFUNC) - add_symbol_to_list (sym, &file_symbols); - else if (cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXT - || cs->c_sclass == C_THUMBEXTFUNC) - add_symbol_to_list (sym, &global_symbols); - } - else - { - SYMBOL_TYPE (sym) = decode_type (cs, cs->c_type, aux); - switch (cs->c_sclass) - { - case C_NULL: - break; - - case C_AUTO: - SYMBOL_CLASS (sym) = LOC_LOCAL; - add_symbol_to_list (sym, &local_symbols); - break; - - case C_THUMBEXT: - case C_THUMBEXTFUNC: - case C_EXT: - SYMBOL_CLASS (sym) = LOC_STATIC; - SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; - SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (section_offsets, SECT_OFF_TEXT); - add_symbol_to_list (sym, &global_symbols); - break; - - case C_THUMBSTAT: - case C_THUMBSTATFUNC: - case C_STAT: - SYMBOL_CLASS (sym) = LOC_STATIC; - SYMBOL_VALUE_ADDRESS (sym) = (CORE_ADDR) cs->c_value; - SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (section_offsets, SECT_OFF_TEXT); - if (within_function) { - /* Static symbol of local scope */ - add_symbol_to_list (sym, &local_symbols); - } - else { - /* Static symbol at top level of file */ - add_symbol_to_list (sym, &file_symbols); - } - break; - -#ifdef C_GLBLREG /* AMD coff */ - case C_GLBLREG: -#endif - case C_REG: - SYMBOL_CLASS (sym) = LOC_REGISTER; - SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM(cs->c_value); - add_symbol_to_list (sym, &local_symbols); - break; - - case C_THUMBLABEL: - case C_LABEL: - break; - - case C_ARG: - SYMBOL_CLASS (sym) = LOC_ARG; - add_symbol_to_list (sym, &local_symbols); -#if !defined (BELIEVE_PCC_PROMOTION) - if (TARGET_BYTE_ORDER == BIG_ENDIAN) - { - /* If PCC says a parameter is a short or a char, - aligned on an int boundary, realign it to the - "little end" of the int. */ - struct type *temptype; - temptype = lookup_fundamental_type (current_objfile, - FT_INTEGER); - if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype) - && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT - && 0 == SYMBOL_VALUE (sym) % TYPE_LENGTH (temptype)) - { - SYMBOL_VALUE (sym) += - TYPE_LENGTH (temptype) - - TYPE_LENGTH (SYMBOL_TYPE (sym)); - } - } -#endif - break; - - case C_REGPARM: - SYMBOL_CLASS (sym) = LOC_REGPARM; - SYMBOL_VALUE (sym) = SDB_REG_TO_REGNUM(cs->c_value); - add_symbol_to_list (sym, &local_symbols); -#if !defined (BELIEVE_PCC_PROMOTION) - /* FIXME: This should retain the current type, since it's just - a register value. gnu@adobe, 26Feb93 */ - { - /* If PCC says a parameter is a short or a char, - it is really an int. */ - struct type *temptype; - temptype = - lookup_fundamental_type (current_objfile, FT_INTEGER); - if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype) - && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT) - { - SYMBOL_TYPE (sym) = - (TYPE_UNSIGNED (SYMBOL_TYPE (sym)) - ? lookup_fundamental_type (current_objfile, - FT_UNSIGNED_INTEGER) - : temptype); - } - } -#endif - break; - - case C_TPDEF: - SYMBOL_CLASS (sym) = LOC_TYPEDEF; - SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; - - /* If type has no name, give it one */ - if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) - { - if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR - || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC) - { - /* If we are giving a name to a type such as "pointer to - foo" or "function returning foo", we better not set - the TYPE_NAME. If the program contains "typedef char - *caddr_t;", we don't want all variables of type char - * to print as caddr_t. This is not just a - consequence of GDB's type management; CC and GCC (at - least through version 2.4) both output variables of - either type char * or caddr_t with the type - refering to the C_TPDEF symbol for caddr_t. If a future - compiler cleans this up it GDB is not ready for it - yet, but if it becomes ready we somehow need to - disable this check (without breaking the PCC/GCC2.4 - case). - - Sigh. - - Fortunately, this check seems not to be necessary - for anything except pointers or functions. */ - ; - } - else - TYPE_NAME (SYMBOL_TYPE (sym)) = - concat (SYMBOL_NAME (sym), NULL); - } -#ifdef CXUX_TARGET - /* Ignore vendor section for Harris CX/UX targets. */ - else if (cs->c_name[0] == '$') - break; -#endif /* CXUX_TARGET */ - - /* Keep track of any type which points to empty structured type, - so it can be filled from a definition from another file. A - simple forward reference (TYPE_CODE_UNDEF) is not an - empty structured type, though; the forward references - work themselves out via the magic of coff_lookup_type. */ - if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR && - TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) == 0 && - TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) != - TYPE_CODE_UNDEF) - { - register int i = hashname (SYMBOL_NAME (sym)); - - SYMBOL_VALUE_CHAIN (sym) = opaque_type_chain[i]; - opaque_type_chain[i] = sym; - } - add_symbol_to_list (sym, &file_symbols); - break; - - case C_STRTAG: - case C_UNTAG: - case C_ENTAG: - SYMBOL_CLASS (sym) = LOC_TYPEDEF; - SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; - - /* Some compilers try to be helpful by inventing "fake" - names for anonymous enums, structures, and unions, like - "~0fake" or ".0fake". Thanks, but no thanks... */ - if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0) - if (SYMBOL_NAME(sym) != NULL - && *SYMBOL_NAME(sym) != '~' - && *SYMBOL_NAME(sym) != '.') - TYPE_TAG_NAME (SYMBOL_TYPE (sym)) = - concat (SYMBOL_NAME (sym), NULL); - - add_symbol_to_list (sym, &file_symbols); - break; - - default: - break; - } - } - return sym; -} - -/* Decode a coff type specifier; return the type that is meant. */ - -static struct type * -decode_type (cs, c_type, aux) - register struct coff_symbol *cs; - unsigned int c_type; - register union internal_auxent *aux; -{ - register struct type *type = 0; - unsigned int new_c_type; - - if (c_type & ~N_BTMASK) - { - new_c_type = DECREF (c_type); - if (ISPTR (c_type)) - { - type = decode_type (cs, new_c_type, aux); - type = lookup_pointer_type (type); - } - else if (ISFCN (c_type)) - { - type = decode_type (cs, new_c_type, aux); - type = lookup_function_type (type); - } - else if (ISARY (c_type)) - { - int i, n; - register unsigned short *dim; - struct type *base_type, *index_type, *range_type; - - /* Define an array type. */ - /* auxent refers to array, not base type */ - if (aux->x_sym.x_tagndx.l == 0) - cs->c_naux = 0; - - /* shift the indices down */ - dim = &aux->x_sym.x_fcnary.x_ary.x_dimen[0]; - i = 1; - n = dim[0]; - for (i = 0; *dim && i < DIMNUM - 1; i++, dim++) - *dim = *(dim + 1); - *dim = 0; - - base_type = decode_type (cs, new_c_type, aux); - index_type = lookup_fundamental_type (current_objfile, FT_INTEGER); - range_type = - create_range_type ((struct type *) NULL, index_type, 0, n - 1); - type = - create_array_type ((struct type *) NULL, base_type, range_type); - } - return type; - } - - /* Reference to existing type. This only occurs with the - struct, union, and enum types. EPI a29k coff - fakes us out by producing aux entries with a nonzero - x_tagndx for definitions of structs, unions, and enums, so we - have to check the c_sclass field. SCO 3.2v4 cc gets confused - with pointers to pointers to defined structs, and generates - negative x_tagndx fields. */ - if (cs->c_naux > 0 && aux->x_sym.x_tagndx.l != 0) - { - if (cs->c_sclass != C_STRTAG - && cs->c_sclass != C_UNTAG - && cs->c_sclass != C_ENTAG - && aux->x_sym.x_tagndx.l >= 0) - { - type = coff_alloc_type (aux->x_sym.x_tagndx.l); - return type; - } - else - { - complain (&tagndx_bad_complaint, cs->c_name); - /* And fall through to decode_base_type... */ - } - } - - return decode_base_type (cs, BTYPE (c_type), aux); -} - -/* Decode a coff type specifier for function definition; - return the type that the function returns. */ - -static struct type * -decode_function_type (cs, c_type, aux) - register struct coff_symbol *cs; - unsigned int c_type; - register union internal_auxent *aux; -{ - if (aux->x_sym.x_tagndx.l == 0) - cs->c_naux = 0; /* auxent refers to function, not base type */ - - return decode_type (cs, DECREF (c_type), aux); -} - -/* basic C types */ - -static struct type * -decode_base_type (cs, c_type, aux) - register struct coff_symbol *cs; - unsigned int c_type; - register union internal_auxent *aux; -{ - struct type *type; - - switch (c_type) - { - case T_NULL: - /* shows up with "void (*foo)();" structure members */ - return lookup_fundamental_type (current_objfile, FT_VOID); - -#if 0 -/* DGUX actually defines both T_ARG and T_VOID to the same value. */ -#ifdef T_ARG - case T_ARG: - /* Shows up in DGUX, I think. Not sure where. */ - return lookup_fundamental_type (current_objfile, FT_VOID); /* shouldn't show up here */ -#endif -#endif /* 0 */ - -#ifdef T_VOID - case T_VOID: - /* Intel 960 COFF has this symbol and meaning. */ - return lookup_fundamental_type (current_objfile, FT_VOID); -#endif - - case T_CHAR: - return lookup_fundamental_type (current_objfile, FT_CHAR); - - case T_SHORT: - return lookup_fundamental_type (current_objfile, FT_SHORT); - - case T_INT: - return lookup_fundamental_type (current_objfile, FT_INTEGER); - - case T_LONG: - if (cs->c_sclass == C_FIELD - && aux->x_sym.x_misc.x_lnsz.x_size > TARGET_LONG_BIT) - return lookup_fundamental_type (current_objfile, FT_LONG_LONG); - else - return lookup_fundamental_type (current_objfile, FT_LONG); - - case T_FLOAT: - return lookup_fundamental_type (current_objfile, FT_FLOAT); - - case T_DOUBLE: - return lookup_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT); - - case T_LNGDBL: - return lookup_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT); - - case T_STRUCT: - if (cs->c_naux != 1) - { - /* anonymous structure type */ - type = coff_alloc_type (cs->c_symnum); - TYPE_CODE (type) = TYPE_CODE_STRUCT; - TYPE_NAME (type) = NULL; - /* This used to set the tag to "<opaque>". But I think setting it - to NULL is right, and the printing code can print it as - "struct {...}". */ - TYPE_TAG_NAME (type) = NULL; - INIT_CPLUS_SPECIFIC(type); - TYPE_LENGTH (type) = 0; - TYPE_FIELDS (type) = 0; - TYPE_NFIELDS (type) = 0; - } - else - { - type = coff_read_struct_type (cs->c_symnum, - aux->x_sym.x_misc.x_lnsz.x_size, - aux->x_sym.x_fcnary.x_fcn.x_endndx.l); - } - return type; - - case T_UNION: - if (cs->c_naux != 1) - { - /* anonymous union type */ - type = coff_alloc_type (cs->c_symnum); - TYPE_NAME (type) = NULL; - /* This used to set the tag to "<opaque>". But I think setting it - to NULL is right, and the printing code can print it as - "union {...}". */ - TYPE_TAG_NAME (type) = NULL; - INIT_CPLUS_SPECIFIC(type); - TYPE_LENGTH (type) = 0; - TYPE_FIELDS (type) = 0; - TYPE_NFIELDS (type) = 0; - } - else - { - type = coff_read_struct_type (cs->c_symnum, - aux->x_sym.x_misc.x_lnsz.x_size, - aux->x_sym.x_fcnary.x_fcn.x_endndx.l); - } - TYPE_CODE (type) = TYPE_CODE_UNION; - return type; - - case T_ENUM: - if (cs->c_naux != 1) - { - /* anonymous enum type */ - type = coff_alloc_type (cs->c_symnum); - TYPE_CODE (type) = TYPE_CODE_ENUM; - TYPE_NAME (type) = NULL; - /* This used to set the tag to "<opaque>". But I think setting it - to NULL is right, and the printing code can print it as - "enum {...}". */ - TYPE_TAG_NAME (type) = NULL; - TYPE_LENGTH (type) = 0; - TYPE_FIELDS (type) = 0; - TYPE_NFIELDS(type) = 0; - } - else - { - type = coff_read_enum_type (cs->c_symnum, - aux->x_sym.x_misc.x_lnsz.x_size, - aux->x_sym.x_fcnary.x_fcn.x_endndx.l); - } - return type; - - case T_MOE: - /* shouldn't show up here */ - break; - - case T_UCHAR: - return lookup_fundamental_type (current_objfile, FT_UNSIGNED_CHAR); - - case T_USHORT: - return lookup_fundamental_type (current_objfile, FT_UNSIGNED_SHORT); - - case T_UINT: - return lookup_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); - - case T_ULONG: - if (cs->c_sclass == C_FIELD - && aux->x_sym.x_misc.x_lnsz.x_size > TARGET_LONG_BIT) - return lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG_LONG); - else - return lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG); - } - complain (&unexpected_type_complaint, cs->c_name); - return lookup_fundamental_type (current_objfile, FT_VOID); -} - -/* This page contains subroutines of read_type. */ - -/* Read the description of a structure (or union type) and return an - object describing the type. */ - -static struct type * -coff_read_struct_type (index, length, lastsym) - int index; - int length; - int lastsym; -{ - struct nextfield - { - struct nextfield *next; - struct field field; - }; - - register struct type *type; - register struct nextfield *list = 0; - struct nextfield *new; - int nfields = 0; - register int n; - char *name; - struct coff_symbol member_sym; - register struct coff_symbol *ms = &member_sym; - struct internal_syment sub_sym; - union internal_auxent sub_aux; - int done = 0; - - type = coff_alloc_type (index); - TYPE_CODE (type) = TYPE_CODE_STRUCT; - INIT_CPLUS_SPECIFIC(type); - TYPE_LENGTH (type) = length; - - while (!done && symnum < lastsym && symnum < nlist_nsyms_global) - { - read_one_sym (ms, &sub_sym, &sub_aux); - name = ms->c_name; - name = EXTERNAL_NAME (name, current_objfile->obfd); - - switch (ms->c_sclass) - { - case C_MOS: - case C_MOU: - - /* Get space to record the next field's data. */ - new = (struct nextfield *) alloca (sizeof (struct nextfield)); - new->next = list; - list = new; - - /* Save the data. */ - list->field.name = - obsavestring (name, - strlen (name), - ¤t_objfile->symbol_obstack); - FIELD_TYPE (list->field) = decode_type (ms, ms->c_type, &sub_aux); - FIELD_BITPOS (list->field) = 8 * ms->c_value; - FIELD_BITSIZE (list->field) = 0; - nfields++; - break; - - case C_FIELD: - - /* Get space to record the next field's data. */ - new = (struct nextfield *) alloca (sizeof (struct nextfield)); - new->next = list; - list = new; - - /* Save the data. */ - list->field.name = - obsavestring (name, - strlen (name), - ¤t_objfile->symbol_obstack); - FIELD_TYPE (list->field) = decode_type (ms, ms->c_type, &sub_aux); - FIELD_BITPOS (list->field) = ms->c_value; - FIELD_BITSIZE (list->field) = sub_aux.x_sym.x_misc.x_lnsz.x_size; - nfields++; - break; - - case C_EOS: - done = 1; - break; - } - } - /* Now create the vector of fields, and record how big it is. */ - - TYPE_NFIELDS (type) = nfields; - TYPE_FIELDS (type) = (struct field *) - TYPE_ALLOC (type, sizeof (struct field) * nfields); - - /* Copy the saved-up fields into the field vector. */ - - for (n = nfields; list; list = list->next) - TYPE_FIELD (type, --n) = list->field; - - return type; -} - -/* Read a definition of an enumeration type, - and create and return a suitable type object. - Also defines the symbols that represent the values of the type. */ - -/* ARGSUSED */ -static struct type * -coff_read_enum_type (index, length, lastsym) - int index; - int length; - int lastsym; -{ - register struct symbol *sym; - register struct type *type; - int nsyms = 0; - int done = 0; - struct pending **symlist; - struct coff_symbol member_sym; - register struct coff_symbol *ms = &member_sym; - struct internal_syment sub_sym; - union internal_auxent sub_aux; - struct pending *osyms, *syms; - int o_nsyms; - register int n; - char *name; - int unsigned_enum = 1; - - type = coff_alloc_type (index); - if (within_function) - symlist = &local_symbols; - else - symlist = &file_symbols; - osyms = *symlist; - o_nsyms = osyms ? osyms->nsyms : 0; - - while (!done && symnum < lastsym && symnum < nlist_nsyms_global) - { - read_one_sym (ms, &sub_sym, &sub_aux); - name = ms->c_name; - name = EXTERNAL_NAME (name, current_objfile->obfd); - - switch (ms->c_sclass) - { - case C_MOE: - sym = (struct symbol *) obstack_alloc - (¤t_objfile->symbol_obstack, - sizeof (struct symbol)); - memset (sym, 0, sizeof (struct symbol)); - - SYMBOL_NAME (sym) = - obsavestring (name, strlen (name), - ¤t_objfile->symbol_obstack); - SYMBOL_CLASS (sym) = LOC_CONST; - SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; - SYMBOL_VALUE (sym) = ms->c_value; - add_symbol_to_list (sym, symlist); - nsyms++; - break; - - case C_EOS: - /* Sometimes the linker (on 386/ix 2.0.2 at least) screws - up the count of how many symbols to read. So stop - on .eos. */ - done = 1; - break; - } - } - - /* Now fill in the fields of the type-structure. */ - - if (length > 0) - TYPE_LENGTH (type) = length; - else - TYPE_LENGTH (type) = TARGET_INT_BIT / TARGET_CHAR_BIT; /* Assume ints */ - TYPE_CODE (type) = TYPE_CODE_ENUM; - TYPE_NFIELDS (type) = nsyms; - TYPE_FIELDS (type) = (struct field *) - TYPE_ALLOC (type, sizeof (struct field) * nsyms); - - /* Find the symbols for the values and put them into the type. - The symbols can be found in the symlist that we put them on - to cause them to be defined. osyms contains the old value - of that symlist; everything up to there was defined by us. */ - /* Note that we preserve the order of the enum constants, so - that in something like "enum {FOO, LAST_THING=FOO}" we print - FOO, not LAST_THING. */ - - for (syms = *symlist, n = 0; syms; syms = syms->next) - { - int j = 0; - - if (syms == osyms) - j = o_nsyms; - for (; j < syms->nsyms; j++,n++) - { - struct symbol *xsym = syms->symbol[j]; - SYMBOL_TYPE (xsym) = type; - TYPE_FIELD_NAME (type, n) = SYMBOL_NAME (xsym); - TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (xsym); - if (SYMBOL_VALUE (xsym) < 0) - unsigned_enum = 0; - TYPE_FIELD_BITSIZE (type, n) = 0; - } - if (syms == osyms) - break; - } - - if (unsigned_enum) - TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED; - - return type; -} - -/* Register our ability to parse symbols for coff BFD files. */ - -static struct sym_fns coff_sym_fns = -{ - bfd_target_coff_flavour, - coff_new_init, /* sym_new_init: init anything gbl to entire symtab */ - coff_symfile_init, /* sym_init: read initial info, setup for sym_read() */ - coff_symfile_read, /* sym_read: read a symbol file into symtab */ - coff_symfile_finish, /* sym_finish: finished with file, cleanup */ - default_symfile_offsets, - /* sym_offsets: xlate external to internal form */ - NULL /* next: pointer to next struct sym_fns */ -}; - -void -_initialize_coffread () -{ - add_symtab_fns (&coff_sym_fns); -} |