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authorJohn Gilmore <gnu@cygnus>1990-09-05 17:54:31 +0000
committerJohn Gilmore <gnu@cygnus>1990-09-05 17:54:31 +0000
commit831c851165e112139af1265f294e198401814c1f (patch)
tree5f155fecb9b690be9c428e822d519c2710fefd47 /gdb/dbxread.c
parent7a67dd45ca1c191a0220697a3ec9fa92993caf8c (diff)
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Initial revision
Diffstat (limited to 'gdb/dbxread.c')
-rw-r--r--gdb/dbxread.c5476
1 files changed, 0 insertions, 5476 deletions
diff --git a/gdb/dbxread.c b/gdb/dbxread.c
deleted file mode 100644
index c5a0fb6..0000000
--- a/gdb/dbxread.c
+++ /dev/null
@@ -1,5476 +0,0 @@
-/* Read dbx symbol tables and convert to internal format, for GDB.
- Copyright (C) 1986, 1987, 1988, 1989 Free Software Foundation, Inc.
-
-This file is part of GDB.
-
-GDB 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 1, or (at your option)
-any later version.
-
-GDB 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 GDB; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-/* Symbol read-in occurs in two phases:
- 1. A scan (read_dbx_symtab()) of the entire executable, whose sole
- purpose is to make a list of symbols (partial symbol table)
- which will cause symbols
- to be read in if referenced. This scan happens when the
- "symbol-file" command is given (symbol_file_command()).
- 2. Full read-in of symbols. (psymtab_to_symtab()). This happens
- when a symbol in a file for which symbols have not yet been
- read in is referenced.
- 2a. The "add-file" command. Similar to #2. */
-
-#include <stdio.h>
-#include "param.h"
-
-#ifdef READ_DBX_FORMAT
-
-#ifdef USG
-#include <sys/types.h>
-#include <fcntl.h>
-#define L_SET 0
-#define L_INCR 1
-#endif
-
-#ifdef COFF_ENCAPSULATE
-#include "a.out.encap.h"
-#include "stab.gnu.h"
-#else
-#include <a.out.h>
-#include <stab.h>
-#endif
-#include <ctype.h>
-
-#ifndef NO_GNU_STABS
-/*
- * Define specifically gnu symbols here.
- */
-
-/* The following type indicates the definition of a symbol as being
- an indirect reference to another symbol. The other symbol
- appears as an undefined reference, immediately following this symbol.
-
- Indirection is asymmetrical. The other symbol's value will be used
- to satisfy requests for the indirect symbol, but not vice versa.
- If the other symbol does not have a definition, libraries will
- be searched to find a definition. */
-#ifndef N_INDR
-#define N_INDR 0xa
-#endif
-
-/* The following symbols refer to set elements.
- All the N_SET[ATDB] symbols with the same name form one set.
- Space is allocated for the set in the text section, and each set
- element's value is stored into one word of the space.
- The first word of the space is the length of the set (number of elements).
-
- The address of the set is made into an N_SETV symbol
- whose name is the same as the name of the set.
- This symbol acts like a N_DATA global symbol
- in that it can satisfy undefined external references. */
-
-#ifndef N_SETA
-#define N_SETA 0x14 /* Absolute set element symbol */
-#endif /* This is input to LD, in a .o file. */
-
-#ifndef N_SETT
-#define N_SETT 0x16 /* Text set element symbol */
-#endif /* This is input to LD, in a .o file. */
-
-#ifndef N_SETD
-#define N_SETD 0x18 /* Data set element symbol */
-#endif /* This is input to LD, in a .o file. */
-
-#ifndef N_SETB
-#define N_SETB 0x1A /* Bss set element symbol */
-#endif /* This is input to LD, in a .o file. */
-
-/* Macros dealing with the set element symbols defined in a.out.h */
-#define SET_ELEMENT_P(x) ((x)>=N_SETA&&(x)<=(N_SETB|N_EXT))
-#define TYPE_OF_SET_ELEMENT(x) ((x)-N_SETA+N_ABS)
-
-#ifndef N_SETV
-#define N_SETV 0x1C /* Pointer to set vector in data area. */
-#endif /* This is output from LD. */
-
-#ifndef N_WARNING
-#define N_WARNING 0x1E /* Warning message to print if file included */
-#endif /* This is input to ld */
-
-#ifndef __GNU_STAB__
-
-/* Line number for the data section. This is to be used to describe
- the source location of a variable declaration. */
-#ifndef N_DSLINE
-#define N_DSLINE (N_SLINE+N_DATA-N_TEXT)
-#endif
-
-/* Line number for the bss section. This is to be used to describe
- the source location of a variable declaration. */
-#ifndef N_BSLINE
-#define N_BSLINE (N_SLINE+N_BSS-N_TEXT)
-#endif
-
-#endif /* not __GNU_STAB__ */
-#endif /* NO_GNU_STABS */
-
-#include <obstack.h>
-#include <sys/param.h>
-#include <sys/file.h>
-#include <sys/stat.h>
-#include "defs.h"
-#include "symtab.h"
-
-#ifndef COFF_FORMAT
-#ifndef AOUTHDR
-#define AOUTHDR struct exec
-#endif
-#endif
-
-static void add_symbol_to_list ();
-static void read_dbx_symtab ();
-static void process_one_symbol ();
-static void free_all_psymbols ();
-static struct type *read_type ();
-static struct type *read_range_type ();
-static struct type *read_enum_type ();
-static struct type *read_struct_type ();
-static struct type *read_array_type ();
-static long read_number ();
-static void finish_block ();
-static struct blockvector *make_blockvector ();
-static struct symbol *define_symbol ();
-static void start_subfile ();
-static int hashname ();
-static void hash_symsegs ();
-static struct pending *copy_pending ();
-static void fix_common_block ();
-
-static void add_undefined_type ();
-static void cleanup_undefined_types ();
-
-extern char *index();
-
-extern struct symtab *read_symsegs ();
-extern void free_all_symtabs ();
-extern void free_all_psymtabs ();
-extern void free_inclink_symtabs ();
-
-/* C++ */
-static struct type **read_args ();
-
-/* Macro to determine which symbols to ignore when reading the first symbol
- of a file. Some machines override this definition. */
-#ifdef N_NSYMS
-#ifndef IGNORE_SYMBOL
-/* This code is used on Ultrix systems. Ignore it */
-#define IGNORE_SYMBOL(type) (type == N_NSYMS)
-#endif
-#else
-#ifndef IGNORE_SYMBOL
-/* Don't ignore any symbols. */
-#define IGNORE_SYMBOL(type) (0)
-#endif
-#endif /* not N_NSYMS */
-
-/* Macro for number of symbol table entries (in usual a.out format).
- Some machines override this definition. */
-#ifndef NUMBER_OF_SYMBOLS
-#ifdef COFF_HEADER
-#define NUMBER_OF_SYMBOLS \
- ((COFF_HEADER(hdr) ? hdr.coffhdr.filehdr.f_nsyms : hdr.a_syms) / \
- sizeof (struct nlist))
-#else
-#define NUMBER_OF_SYMBOLS (hdr.a_syms / sizeof (struct nlist))
-#endif
-#endif
-
-/* Macro for file-offset of symbol table (in usual a.out format). */
-#ifndef SYMBOL_TABLE_OFFSET
-#define SYMBOL_TABLE_OFFSET N_SYMOFF (hdr)
-#endif
-
-/* Macro for file-offset of string table (in usual a.out format). */
-#ifndef STRING_TABLE_OFFSET
-#define STRING_TABLE_OFFSET (N_SYMOFF (hdr) + hdr.a_syms)
-#endif
-
-/* Macro to store the length of the string table data in INTO. */
-#ifndef READ_STRING_TABLE_SIZE
-#define READ_STRING_TABLE_SIZE(INTO) \
-{ val = myread (desc, &INTO, sizeof INTO); \
- if (val < 0) perror_with_name (name); }
-#endif
-
-/* Macro to declare variables to hold the file's header data. */
-#ifndef DECLARE_FILE_HEADERS
-#define DECLARE_FILE_HEADERS AOUTHDR hdr
-#endif
-
-/* Macro to read the header data from descriptor DESC and validate it.
- NAME is the file name, for error messages. */
-#ifndef READ_FILE_HEADERS
-#ifdef HEADER_SEEK_FD
-#define READ_FILE_HEADERS(DESC, NAME) \
-{ HEADER_SEEK_FD (DESC); \
- val = myread (DESC, &hdr, sizeof hdr); \
- if (val < 0) perror_with_name (NAME); \
- if (N_BADMAG (hdr)) \
- error ("File \"%s\" not in executable format.", NAME); }
-#else
-#define READ_FILE_HEADERS(DESC, NAME) \
-{ val = myread (DESC, &hdr, sizeof hdr); \
- if (val < 0) perror_with_name (NAME); \
- if (N_BADMAG (hdr)) \
- error ("File \"%s\" not in executable format.", NAME); }
-#endif
-#endif
-
-/* Non-zero if this is an object (.o) file, rather than an executable.
- Distinguishing between the two is rarely necessary (and seems like
- a hack, but there is no other way to do ADDR_OF_TEXT_SEGMENT
- right for SunOS). */
-#if !defined (IS_OBJECT_FILE)
-/* This will not work
- if someone decides to make ld preserve relocation info. */
-#define IS_OBJECT_FILE (hdr.a_trsize != 0)
-#endif
-
-/* Macro for size of text segment */
-#ifndef SIZE_OF_TEXT_SEGMENT
-#define SIZE_OF_TEXT_SEGMENT hdr.a_text
-#endif
-
-/* Get the address in debugged memory of the start
- of the text segment. */
-#if !defined (ADDR_OF_TEXT_SEGMENT)
-#if defined (N_TXTADDR)
-#define ADDR_OF_TEXT_SEGMENT (IS_OBJECT_FILE ? 0 : N_TXTADDR (hdr))
-#else /* no N_TXTADDR */
-#define ADDR_OF_TEXT_SEGMENT 0
-#endif /* no N_TXTADDR */
-#endif /* no ADDR_OF_TEXT_SEGMENT */
-
-/* Macro to get entry point from headers. */
-#ifndef ENTRY_POINT
-#define ENTRY_POINT hdr.a_entry
-#endif
-
-/* Macro for name of symbol to indicate a file compiled with gcc. */
-#ifndef GCC_COMPILED_FLAG_SYMBOL
-#define GCC_COMPILED_FLAG_SYMBOL "gcc_compiled."
-#endif
-
-/* Convert stab register number (from `r' declaration) to a gdb REGNUM. */
-
-#ifndef STAB_REG_TO_REGNUM
-#define STAB_REG_TO_REGNUM(VALUE) (VALUE)
-#endif
-
-/* Define this as 1 if a pcc declaration of a char or short argument
- gives the correct address. Otherwise assume pcc gives the
- address of the corresponding int, which is not the same on a
- big-endian machine. */
-
-#ifndef BELIEVE_PCC_PROMOTION
-#define BELIEVE_PCC_PROMOTION 0
-#endif
-
-/* Nonzero means give verbose info on gdb action. From main.c. */
-extern int info_verbose;
-
-/* Chain of symtabs made from reading the file's symsegs.
- These symtabs do not go into symtab_list themselves,
- but the information is copied from them when appropriate
- to make the symtabs that will exist permanently. */
-
-static struct symtab *symseg_chain;
-
-/* Symseg symbol table for the file whose data we are now processing.
- It is one of those in symseg_chain. Or 0, for a compilation that
- has no symseg. */
-
-static struct symtab *current_symseg;
-
-/* Name of source file whose symbol data we are now processing.
- This comes from a symbol of type N_SO. */
-
-static char *last_source_file;
-
-/* Core address of start of text of current source file.
- This too comes from the N_SO symbol. */
-
-static CORE_ADDR last_source_start_addr;
-
-/* End of the text segment of the executable file,
- as found in the symbol _etext. */
-
-static CORE_ADDR end_of_text_addr;
-
-/* The list of sub-source-files within the current individual compilation.
- Each file gets its own symtab with its own linetable and associated info,
- but they all share one blockvector. */
-
-struct subfile
-{
- struct subfile *next;
- char *name;
- struct linetable *line_vector;
- int line_vector_length;
- int line_vector_index;
- int prev_line_number;
-};
-
-static struct subfile *subfiles;
-
-static struct subfile *current_subfile;
-
-/* Count symbols as they are processed, for error messages. */
-
-static int symnum;
-
-/* Vector of types defined so far, indexed by their dbx type numbers.
- (In newer sun systems, dbx uses a pair of numbers in parens,
- as in "(SUBFILENUM,NUMWITHINSUBFILE)". Then these numbers must be
- translated through the type_translations hash table to get
- the index into the type vector.) */
-
-static struct typevector *type_vector;
-
-/* Number of elements allocated for type_vector currently. */
-
-static int type_vector_length;
-
-/* 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;
-
-/* Hash table of global symbols whose values are not known yet.
- They are chained thru the SYMBOL_VALUE, since we don't
- have the correct data for that slot yet. */
-/* The use of the LOC_BLOCK code in this chain is nonstandard--
- it refers to a FORTRAN common block rather than the usual meaning. */
-
-#define HASHSIZE 127
-static struct symbol *global_sym_chain[HASHSIZE];
-
-/* Record the symbols defined for each context in a list.
- We don't create a struct block for the context until we
- know how long to make it. */
-
-#define PENDINGSIZE 100
-
-struct pending
-{
- struct pending *next;
- int nsyms;
- struct symbol *symbol[PENDINGSIZE];
-};
-
-/* List of free `struct pending' structures for reuse. */
-struct pending *free_pendings;
-
-/* Here are the three lists that symbols are put on. */
-
-struct pending *file_symbols; /* static at top level, and types */
-
-struct pending *global_symbols; /* global functions and variables */
-
-struct pending *local_symbols; /* everything local to lexical context */
-
-/* List of symbols declared since the last BCOMM. This list is a tail
- of local_symbols. When ECOMM is seen, the symbols on the list
- are noted so their proper addresses can be filled in later,
- using the common block base address gotten from the assembler
- stabs. */
-
-struct pending *common_block;
-int common_block_i;
-
-/* Stack representing unclosed lexical contexts
- (that will become blocks, eventually). */
-
-struct context_stack
-{
- struct pending *locals;
- struct pending_block *old_blocks;
- struct symbol *name;
- CORE_ADDR start_addr;
- int depth;
-};
-
-struct context_stack *context_stack;
-
-/* Index of first unused entry in context stack. */
-int context_stack_depth;
-
-/* Currently allocated size of context stack. */
-
-int context_stack_size;
-
-/* Nonzero if within a function (so symbols should be local,
- if nothing says specifically). */
-
-int within_function;
-
-/* List of blocks already made (lexical contexts already closed).
- This is used at the end to make the blockvector. */
-
-struct pending_block
-{
- struct pending_block *next;
- struct block *block;
-};
-
-struct pending_block *pending_blocks;
-
-extern CORE_ADDR startup_file_start; /* From blockframe.c */
-extern CORE_ADDR startup_file_end; /* From blockframe.c */
-
-/* File name symbols were loaded from. */
-
-static char *symfile;
-
-/* Low and high symbol values (inclusive) for the global variable
- entries in the symbol file. */
-
-static int first_global_sym, last_global_sym;
-
-/* Structures with which to manage partial symbol allocation. */
-
-struct psymbol_allocation_list global_psymbols, static_psymbols;
-
-/* Global variable which, when set, indicates that we are processing a
- .o file compiled with gcc */
-
-static unsigned char processing_gcc_compilation;
-
-/* Make a list of forward references which haven't been defined. */
-static struct type **undef_types;
-static int undef_types_allocated, undef_types_length;
-
- /* Setup a define to deal cleanly with the underscore problem */
-
-#ifdef NAMES_HAVE_UNDERSCORE
-#define HASH_OFFSET 1
-#else
-#define HASH_OFFSET 0
-#endif
-
-#if 0
-/* I'm not sure why this is here. To debug bugs which cause
- an infinite loop of allocations, I suppose. In any event,
- dumping core when out of memory isn't usually right. */
-static int
-xxmalloc (n)
-{
- int v = malloc (n);
- if (v == 0)
- {
- fprintf (stderr, "Virtual memory exhausted.\n");
- abort ();
- }
- return v;
-}
-#else /* not 0 */
-#define xxmalloc xmalloc
-#endif /* not 0 */
-
-/* Make a copy of the string at PTR with SIZE characters in the symbol obstack
- (and add a null character at the end in the copy).
- Returns the address of the copy. */
-
-static char *
-obsavestring (ptr, size)
- char *ptr;
- int size;
-{
- register char *p = (char *) obstack_alloc (symbol_obstack, size + 1);
- /* Open-coded bcopy--saves function call time.
- These strings are usually short. */
- {
- register char *p1 = ptr;
- register char *p2 = p;
- char *end = ptr + size;
- while (p1 != end)
- *p2++ = *p1++;
- }
- p[size] = 0;
- return p;
-}
-
-/* Concatenate strings S1, S2 and S3; return the new string.
- Space is found in the symbol_obstack. */
-
-static char *
-obconcat (s1, s2, s3)
- char *s1, *s2, *s3;
-{
- register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1;
- register char *val = (char *) obstack_alloc (symbol_obstack, len);
- strcpy (val, s1);
- strcat (val, s2);
- strcat (val, s3);
- return val;
-}
-
-/* Support for Sun changes to dbx symbol format */
-
-/* For each identified header file, we have a table of types defined
- in that header file.
-
- header_files maps header file names to their type tables.
- It is a vector of n_header_files elements.
- Each element describes one header file.
- It contains a vector of types.
-
- Sometimes it can happen that the same header file produces
- different results when included in different places.
- This can result from conditionals or from different
- things done before including the file.
- When this happens, there are multiple entries for the file in this table,
- one entry for each distinct set of results.
- The entries are distinguished by the INSTANCE field.
- The INSTANCE field appears in the N_BINCL and N_EXCL symbol table and is
- used to match header-file references to their corresponding data. */
-
-struct header_file
-{
- char *name; /* Name of header file */
- int instance; /* Numeric code distinguishing instances
- of one header file that produced
- different results when included.
- It comes from the N_BINCL or N_EXCL. */
- struct type **vector; /* Pointer to vector of types */
- int length; /* Allocated length (# elts) of that vector */
-};
-
-static struct header_file *header_files;
-
-static int n_header_files;
-
-static int n_allocated_header_files;
-
-/* During initial symbol readin, we need to have a structure to keep
- track of which psymtabs have which bincls in them. This structure
- is used during readin to setup the list of dependencies within each
- partial symbol table. */
-
-struct header_file_location
-{
- char *name; /* Name of header file */
- int instance; /* See above */
- struct partial_symtab *pst; /* Partial symtab that has the
- BINCL/EINCL defs for this file */
-};
-
-/* The actual list and controling variables */
-static struct header_file_location *bincl_list, *next_bincl;
-static int bincls_allocated;
-
-/* Within each object file, various header files are assigned numbers.
- A type is defined or referred to with a pair of numbers
- (FILENUM,TYPENUM) where FILENUM is the number of the header file
- and TYPENUM is the number within that header file.
- TYPENUM is the index within the vector of types for that header file.
-
- FILENUM == 1 is special; it refers to the main source of the object file,
- and not to any header file. FILENUM != 1 is interpreted by looking it up
- in the following table, which contains indices in header_files. */
-
-static int *this_object_header_files;
-
-static int n_this_object_header_files;
-
-static int n_allocated_this_object_header_files;
-
-/* When a header file is getting special overriding definitions
- for one source file, record here the header_files index
- of its normal definition vector.
- At other times, this is -1. */
-
-static int header_file_prev_index;
-
-/* At the start of reading dbx symbols, allocate our tables. */
-
-static void
-init_header_files ()
-{
- n_allocated_header_files = 10;
- header_files = (struct header_file *) xxmalloc (10 * sizeof (struct header_file));
- n_header_files = 0;
-
- n_allocated_this_object_header_files = 10;
- this_object_header_files = (int *) xxmalloc (10 * sizeof (int));
-}
-
-/* At the end of reading dbx symbols, free our tables. */
-
-static void
-free_header_files ()
-{
- register int i;
- for (i = 0; i < n_header_files; i++)
- free (header_files[i].name);
- if (header_files) free (header_files);
- if (this_object_header_files)
- free (this_object_header_files);
-}
-
-/* Called at the start of each object file's symbols.
- Clear out the mapping of header file numbers to header files. */
-
-static void
-new_object_header_files ()
-{
- /* Leave FILENUM of 0 free for builtin types and this file's types. */
- n_this_object_header_files = 1;
- header_file_prev_index = -1;
-}
-
-/* Add header file number I for this object file
- at the next successive FILENUM. */
-
-static void
-add_this_object_header_file (i)
- int i;
-{
- if (n_this_object_header_files == n_allocated_this_object_header_files)
- {
- n_allocated_this_object_header_files *= 2;
- this_object_header_files
- = (int *) xrealloc (this_object_header_files,
- n_allocated_this_object_header_files * sizeof (int));
- }
-
- this_object_header_files[n_this_object_header_files++] = i;
-}
-
-/* Add to this file an "old" header file, one already seen in
- a previous object file. NAME is the header file's name.
- INSTANCE is its instance code, to select among multiple
- symbol tables for the same header file. */
-
-static void
-add_old_header_file (name, instance)
- char *name;
- int instance;
-{
- register struct header_file *p = header_files;
- register int i;
-
- for (i = 0; i < n_header_files; i++)
- if (!strcmp (p[i].name, name) && instance == p[i].instance)
- {
- add_this_object_header_file (i);
- return;
- }
- error ("Invalid symbol data: \"repeated\" header file that hasn't been seen before, at symtab pos %d.",
- symnum);
-}
-
-/* Add to this file a "new" header file: definitions for its types follow.
- NAME is the header file's name.
- Most often this happens only once for each distinct header file,
- but not necessarily. If it happens more than once, INSTANCE has
- a different value each time, and references to the header file
- use INSTANCE values to select among them.
-
- dbx output contains "begin" and "end" markers for each new header file,
- but at this level we just need to know which files there have been;
- so we record the file when its "begin" is seen and ignore the "end". */
-
-static void
-add_new_header_file (name, instance)
- char *name;
- int instance;
-{
- register int i;
- register struct header_file *p = header_files;
- header_file_prev_index = -1;
-
-#if 0
- /* This code was used before I knew about the instance codes.
- My first hypothesis is that it is not necessary now
- that instance codes are handled. */
-
- /* Has this header file a previous definition?
- If so, make a new entry anyway so that this use in this source file
- gets a separate entry. Later source files get the old entry.
- Record here the index of the old entry, so that any type indices
- not previously defined can get defined in the old entry as
- well as in the new one. */
-
- for (i = 0; i < n_header_files; i++)
- if (!strcmp (p[i].name, name))
- {
- header_file_prev_index = i;
- }
-
-#endif
-
- /* Make sure there is room for one more header file. */
-
- if (n_header_files == n_allocated_header_files)
- {
- n_allocated_header_files *= 2;
- header_files = (struct header_file *)
- xrealloc (header_files,
- (n_allocated_header_files
- * sizeof (struct header_file)));
- }
-
- /* Create an entry for this header file. */
-
- i = n_header_files++;
- header_files[i].name = savestring (name, strlen(name));
- header_files[i].instance = instance;
- header_files[i].length = 10;
- header_files[i].vector
- = (struct type **) xxmalloc (10 * sizeof (struct type *));
- bzero (header_files[i].vector, 10 * sizeof (struct type *));
-
- add_this_object_header_file (i);
-}
-
-/* Look up a dbx type-number pair. Return the address of the slot
- where the type for that number-pair is stored.
- The number-pair is in TYPENUMS.
-
- This can be used for finding the type associated with that pair
- or for associating a new type with the pair. */
-
-static struct type **
-dbx_lookup_type (typenums)
- int typenums[2];
-{
- register int filenum = typenums[0], index = typenums[1];
-
- if (filenum < 0 || filenum >= n_this_object_header_files)
- error ("Invalid symbol data: type number (%d,%d) out of range at symtab pos %d.",
- filenum, index, symnum);
-
- if (filenum == 0)
- {
- /* Type is defined outside of header files.
- Find it in this object file's type vector. */
- if (index >= type_vector_length)
- {
- type_vector_length *= 2;
- type_vector = (struct typevector *)
- xrealloc (type_vector,
- (sizeof (struct typevector)
- + type_vector_length * sizeof (struct type *)));
- bzero (&type_vector->type[type_vector_length / 2],
- type_vector_length * sizeof (struct type *) / 2);
- }
- return &type_vector->type[index];
- }
- else
- {
- register int real_filenum = this_object_header_files[filenum];
- register struct header_file *f;
-
- if (real_filenum >= n_header_files)
- abort ();
-
- f = &header_files[real_filenum];
-
- if (index >= f->length)
- {
- f->length *= 2;
- f->vector = (struct type **)
- xrealloc (f->vector, f->length * sizeof (struct type *));
- bzero (&f->vector[f->length / 2],
- f->length * sizeof (struct type *) / 2);
- }
- return &f->vector[index];
- }
-}
-
-/* Create a type object. Occaisionally used when you need a type
- which isn't going to be given a type number. */
-
-static struct type *
-dbx_create_type ()
-{
- register struct type *type =
- (struct type *) obstack_alloc (symbol_obstack, sizeof (struct type));
-
- bzero (type, sizeof (struct type));
- TYPE_VPTR_FIELDNO (type) = -1;
- return type;
-}
-
-/* Make sure there is a type allocated for type numbers TYPENUMS
- and return the type object.
- This can create an empty (zeroed) type object.
- TYPENUMS may be (-1, -1) to return a new type object that is not
- put into the type vector, and so may not be referred to by number. */
-
-static struct type *
-dbx_alloc_type (typenums)
- int typenums[2];
-{
- register struct type **type_addr;
- register struct type *type;
-
- if (typenums[1] != -1)
- {
- type_addr = dbx_lookup_type (typenums);
- type = *type_addr;
- }
- else
- {
- type_addr = 0;
- type = 0;
- }
-
- /* 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 == 0)
- {
- type = dbx_create_type ();
- if (type_addr)
- *type_addr = type;
- }
-
- return type;
-}
-
-#if 0
-static struct type **
-explicit_lookup_type (real_filenum, index)
- int real_filenum, index;
-{
- register struct header_file *f = &header_files[real_filenum];
-
- if (index >= f->length)
- {
- f->length *= 2;
- f->vector = (struct type **)
- xrealloc (f->vector, f->length * sizeof (struct type *));
- bzero (&f->vector[f->length / 2],
- f->length * sizeof (struct type *) / 2);
- }
- return &f->vector[index];
-}
-#endif
-
-/* maintain the lists of symbols and blocks */
-
-/* Add a symbol to one of the lists of symbols. */
-static void
-add_symbol_to_list (symbol, listhead)
- struct symbol *symbol;
- struct pending **listhead;
-{
- /* We keep PENDINGSIZE symbols in each link of the list.
- If we don't have a link with room in it, add a new link. */
- if (*listhead == 0 || (*listhead)->nsyms == PENDINGSIZE)
- {
- register struct pending *link;
- if (free_pendings)
- {
- link = free_pendings;
- free_pendings = link->next;
- }
- else
- link = (struct pending *) xxmalloc (sizeof (struct pending));
-
- link->next = *listhead;
- *listhead = link;
- link->nsyms = 0;
- }
-
- (*listhead)->symbol[(*listhead)->nsyms++] = symbol;
-}
-
-/* At end of reading syms, or in case of quit,
- really free as many `struct pending's as we can easily find. */
-
-static void
-really_free_pendings ()
-{
- struct pending *next, *next1;
- struct pending_block *bnext, *bnext1;
-
- for (next = free_pendings; next; next = next1)
- {
- next1 = next->next;
- free (next);
- }
- free_pendings = 0;
-
- for (bnext = pending_blocks; bnext; bnext = bnext1)
- {
- bnext1 = bnext->next;
- free (bnext);
- }
- pending_blocks = 0;
-
- for (next = file_symbols; next; next = next1)
- {
- next1 = next->next;
- free (next);
- }
- for (next = global_symbols; next; next = next1)
- {
- next1 = next->next;
- free (next);
- }
-}
-
-/* Take one of the lists of symbols and make a block from it.
- Keep the order the symbols have in the list (reversed from the input file).
- Put the block on the list of pending blocks. */
-
-static void
-finish_block (symbol, listhead, old_blocks, start, end)
- struct symbol *symbol;
- struct pending **listhead;
- struct pending_block *old_blocks;
- CORE_ADDR start, end;
-{
- register struct pending *next, *next1;
- register struct block *block;
- register struct pending_block *pblock;
- struct pending_block *opblock;
- register int i;
-
- /* Count the length of the list of symbols. */
-
- for (next = *listhead, i = 0; next; i += next->nsyms, next = next->next);
-
- block = (struct block *) obstack_alloc (symbol_obstack,
- (sizeof (struct block)
- + ((i - 1)
- * sizeof (struct symbol *))));
-
- /* Copy the symbols into the block. */
-
- BLOCK_NSYMS (block) = i;
- for (next = *listhead; next; next = next->next)
- {
- register int j;
- for (j = next->nsyms - 1; j >= 0; j--)
- BLOCK_SYM (block, --i) = next->symbol[j];
- }
-
- BLOCK_START (block) = start;
- BLOCK_END (block) = end;
- BLOCK_SUPERBLOCK (block) = 0; /* Filled in when containing block is made */
- BLOCK_GCC_COMPILED (block) = processing_gcc_compilation;
-
- /* Put the block in as the value of the symbol that names it. */
-
- if (symbol)
- {
- SYMBOL_BLOCK_VALUE (symbol) = block;
- BLOCK_FUNCTION (block) = symbol;
- }
- else
- BLOCK_FUNCTION (block) = 0;
-
- /* Now "free" the links of the list, and empty the list. */
-
- for (next = *listhead; next; next = next1)
- {
- next1 = next->next;
- next->next = free_pendings;
- free_pendings = next;
- }
- *listhead = 0;
-
- /* Install this block as the superblock
- of all blocks made since the start of this scope
- that don't have superblocks yet. */
-
- opblock = 0;
- for (pblock = pending_blocks; pblock != old_blocks; pblock = pblock->next)
- {
- if (BLOCK_SUPERBLOCK (pblock->block) == 0)
- BLOCK_SUPERBLOCK (pblock->block) = block;
- opblock = pblock;
- }
-
- /* Record this block on the list of all blocks in the file.
- Put it after opblock, or at the beginning if opblock is 0.
- This puts the block in the list after all its subblocks. */
-
- /* Allocate in the symbol_obstack to save time.
- It wastes a little space. */
- pblock = (struct pending_block *)
- obstack_alloc (symbol_obstack,
- sizeof (struct pending_block));
- pblock->block = block;
- if (opblock)
- {
- pblock->next = opblock->next;
- opblock->next = pblock;
- }
- else
- {
- pblock->next = pending_blocks;
- pending_blocks = pblock;
- }
-}
-
-static struct blockvector *
-make_blockvector ()
-{
- register struct pending_block *next, *next1;
- register struct blockvector *blockvector;
- register int i;
-
- /* Count the length of the list of blocks. */
-
- for (next = pending_blocks, i = 0; next; next = next->next, i++);
-
- blockvector = (struct blockvector *)
- obstack_alloc (symbol_obstack,
- (sizeof (struct blockvector)
- + (i - 1) * sizeof (struct block *)));
-
- /* Copy the blocks into the blockvector.
- This is done in reverse order, which happens to put
- the blocks into the proper order (ascending starting address).
- finish_block has hair to insert each block into the list
- after its subblocks in order to make sure this is true. */
-
- BLOCKVECTOR_NBLOCKS (blockvector) = i;
- for (next = pending_blocks; next; next = next->next)
- BLOCKVECTOR_BLOCK (blockvector, --i) = next->block;
-
-#if 0 /* Now we make the links in the obstack, so don't free them. */
- /* Now free the links of the list, and empty the list. */
-
- for (next = pending_blocks; next; next = next1)
- {
- next1 = next->next;
- free (next);
- }
-#endif
- pending_blocks = 0;
-
- return blockvector;
-}
-
-/* Manage the vector of line numbers. */
-
-static void
-record_line (line, pc)
- int line;
- CORE_ADDR pc;
-{
- struct linetable_entry *e;
- /* Ignore the dummy line number in libg.o */
-
- if (line == 0xffff)
- return;
-
- /* Make sure line vector is big enough. */
-
- if (line_vector_index + 1 >= line_vector_length)
- {
- line_vector_length *= 2;
- line_vector = (struct linetable *)
- xrealloc (line_vector,
- (sizeof (struct linetable)
- + line_vector_length * sizeof (struct linetable_entry)));
- current_subfile->line_vector = line_vector;
- }
-
- 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 dbx symbol of type N_SO is seen;
- it indicates the start of data for one original source file. */
-
-static void
-start_symtab (name, start_addr)
- char *name;
- CORE_ADDR start_addr;
-{
- register struct symtab *s;
-
- last_source_file = name;
- last_source_start_addr = start_addr;
- file_symbols = 0;
- global_symbols = 0;
- within_function = 0;
-
- /* Context stack is initially empty, with room for 10 levels. */
- context_stack
- = (struct context_stack *) xxmalloc (10 * sizeof (struct context_stack));
- context_stack_size = 10;
- context_stack_depth = 0;
-
- new_object_header_files ();
-
- for (s = symseg_chain; s; s = s->next)
- if (s->ldsymoff == symnum * sizeof (struct nlist))
- break;
- current_symseg = s;
- if (s != 0)
- return;
-
- type_vector_length = 160;
- type_vector = (struct typevector *)
- xxmalloc (sizeof (struct typevector)
- + type_vector_length * sizeof (struct type *));
- bzero (type_vector->type, type_vector_length * sizeof (struct type *));
-
- /* Initialize the list of sub source files with one entry
- for this file (the top-level source file). */
-
- subfiles = 0;
- current_subfile = 0;
- start_subfile (name);
-
-#if 0 /* This is now set at the beginning of read_ofile_symtab */
- /* Set default for compiler to pcc; assume that we aren't processing
- a gcc compiled file until proved otherwise. */
-
- processing_gcc_compilation = 0;
-#endif
-}
-
-/* Handle an N_SOL symbol, which indicates the start of
- code that came from an included (or otherwise merged-in)
- source file with a different name. */
-
-static void
-start_subfile (name)
- char *name;
-{
- register struct subfile *subfile;
-
- /* Save the current subfile's line vector data. */
-
- if (current_subfile)
- {
- current_subfile->line_vector_index = line_vector_index;
- current_subfile->line_vector_length = line_vector_length;
- current_subfile->prev_line_number = prev_line_number;
- }
-
- /* See if this subfile is already known as a subfile of the
- current main source file. */
-
- for (subfile = subfiles; subfile; subfile = subfile->next)
- {
- if (!strcmp (subfile->name, name))
- {
- line_vector = subfile->line_vector;
- line_vector_index = subfile->line_vector_index;
- line_vector_length = subfile->line_vector_length;
- prev_line_number = subfile->prev_line_number;
- current_subfile = subfile;
- return;
- }
- }
-
- /* This subfile is not known. Add an entry for it. */
-
- line_vector_index = 0;
- line_vector_length = 1000;
- prev_line_number = -2; /* Force first line number to be explicit */
- line_vector = (struct linetable *)
- xxmalloc (sizeof (struct linetable)
- + line_vector_length * sizeof (struct linetable_entry));
-
- /* Make an entry for this subfile in the list of all subfiles
- of the current main source file. */
-
- subfile = (struct subfile *) xxmalloc (sizeof (struct subfile));
- subfile->next = subfiles;
- subfile->name = savestring (name, strlen (name));
- subfile->line_vector = line_vector;
- subfiles = subfile;
- current_subfile = subfile;
-}
-
-/* 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.
-
- END_ADDR is the address of the end of the file's text. */
-
-static void
-end_symtab (end_addr)
- CORE_ADDR end_addr;
-{
- register struct symtab *symtab;
- register struct blockvector *blockvector;
- register struct subfile *subfile;
- register struct linetable *lv;
- struct subfile *nextsub;
-
- if (current_symseg != 0)
- {
- last_source_file = 0;
- current_symseg = 0;
- return;
- }
-
- /* Finish the lexical context of the last function in the file;
- pop the context stack. */
-
- if (context_stack_depth > 0)
- {
- register struct context_stack *cstk;
- context_stack_depth--;
- cstk = &context_stack[context_stack_depth];
- /* Make a block for the local symbols within. */
- finish_block (cstk->name, &local_symbols, cstk->old_blocks,
- cstk->start_addr, end_addr);
- }
-
- /* Cleanup any undefined types that have been left hanging around
- (this needs to be done before the finish_blocks so that
- file_symbols is still good). */
- cleanup_undefined_types ();
-
- /* Finish defining all the blocks of this symtab. */
- finish_block (0, &file_symbols, 0, last_source_start_addr, end_addr);
- finish_block (0, &global_symbols, 0, last_source_start_addr, end_addr);
- blockvector = make_blockvector ();
-
- current_subfile->line_vector_index = line_vector_index;
-
- /* Now create the symtab objects proper, one for each subfile. */
- /* (The main file is one of them.) */
-
- for (subfile = subfiles; subfile; subfile = nextsub)
- {
- symtab = (struct symtab *) xxmalloc (sizeof (struct symtab));
- symtab->free_ptr = 0;
-
- /* Fill in its components. */
- symtab->blockvector = blockvector;
- type_vector->length = type_vector_length;
- symtab->typevector = type_vector;
- symtab->free_code = free_linetable;
- if (subfile->next == 0)
- symtab->free_ptr = (char *) type_vector;
-
- symtab->filename = subfile->name;
- lv = subfile->line_vector;
- lv->nitems = subfile->line_vector_index;
- symtab->linetable = (struct linetable *)
- xrealloc (lv, (sizeof (struct linetable)
- + lv->nitems * sizeof (struct linetable_entry)));
- symtab->nlines = 0;
- symtab->line_charpos = 0;
-
- /* Link the new symtab into the list of such. */
- symtab->next = symtab_list;
- symtab_list = symtab;
-
- nextsub = subfile->next;
- free (subfile);
- }
-
- type_vector = 0;
- type_vector_length = -1;
- line_vector = 0;
- line_vector_length = -1;
- last_source_file = 0;
-}
-
-#ifdef N_BINCL
-
-/* Handle the N_BINCL and N_EINCL symbol types
- that act like N_SOL for switching source files
- (different subfiles, as we call them) within one object file,
- but using a stack rather than in an arbitrary order. */
-
-struct subfile_stack
-{
- struct subfile_stack *next;
- char *name;
- int prev_index;
-};
-
-struct subfile_stack *subfile_stack;
-
-static void
-push_subfile ()
-{
- register struct subfile_stack *tem
- = (struct subfile_stack *) xxmalloc (sizeof (struct subfile_stack));
-
- tem->next = subfile_stack;
- subfile_stack = tem;
- if (current_subfile == 0 || current_subfile->name == 0)
- abort ();
- tem->name = current_subfile->name;
- tem->prev_index = header_file_prev_index;
-}
-
-static char *
-pop_subfile ()
-{
- register char *name;
- register struct subfile_stack *link = subfile_stack;
-
- if (link == 0)
- abort ();
-
- name = link->name;
- subfile_stack = link->next;
- header_file_prev_index = link->prev_index;
- free (link);
-
- return name;
-}
-#endif /* Have N_BINCL */
-
-/* Accumulate the misc functions in bunches of 127.
- At the end, copy them all into one newly allocated structure. */
-
-#define MISC_BUNCH_SIZE 127
-
-struct misc_bunch
-{
- struct misc_bunch *next;
- struct misc_function contents[MISC_BUNCH_SIZE];
-};
-
-/* Bunch currently being filled up.
- The next field points to chain of filled bunches. */
-
-static struct misc_bunch *misc_bunch;
-
-/* Number of slots filled in current bunch. */
-
-static int misc_bunch_index;
-
-/* Total number of misc functions recorded so far. */
-
-static int misc_count;
-
-static void
-init_misc_functions ()
-{
- misc_count = 0;
- misc_bunch = 0;
- misc_bunch_index = MISC_BUNCH_SIZE;
-}
-
-static void
-record_misc_function (name, address, type)
- char *name;
- CORE_ADDR address;
- int type;
-{
- register struct misc_bunch *new;
-
- if (misc_bunch_index == MISC_BUNCH_SIZE)
- {
- new = (struct misc_bunch *) xxmalloc (sizeof (struct misc_bunch));
- misc_bunch_index = 0;
- new->next = misc_bunch;
- misc_bunch = new;
- }
- misc_bunch->contents[misc_bunch_index].name = name;
- misc_bunch->contents[misc_bunch_index].address = address;
- misc_bunch->contents[misc_bunch_index].type = (unsigned char)
- (type == (N_TEXT | N_EXT) ? mf_text :
- (type == (N_DATA | N_EXT)
-#ifdef N_SETV
- || type == (N_SETV | N_EXT)
-#endif
- ) ? mf_data :
- type == (N_BSS | N_EXT) ? mf_bss :
- type == (N_ABS | N_EXT) ? mf_abs : mf_unknown);
- misc_bunch_index++;
- misc_count++;
-}
-
-static int
-compare_misc_functions (fn1, fn2)
- struct misc_function *fn1, *fn2;
-{
- /* Return a signed result based on unsigned comparisons
- so that we sort into unsigned numeric order. */
- if (fn1->address < fn2->address)
- return -1;
- if (fn1->address > fn2->address)
- return 1;
- return 0;
-}
-
-static void
-discard_misc_bunches ()
-{
- register struct misc_bunch *next;
-
- while (misc_bunch)
- {
- next = misc_bunch->next;
- free (misc_bunch);
- misc_bunch = next;
- }
-}
-
-/* INCLINK nonzero means bunches are from an incrementally-linked file.
- Add them to the existing bunches.
- Otherwise INCLINK is zero, and we start from scratch. */
-static void
-condense_misc_bunches (inclink)
- int inclink;
-{
- register int i, j;
- register struct misc_bunch *bunch;
-#ifdef NAMES_HAVE_UNDERSCORE
- int offset = 1;
-#else
- int offset = 0;
-#endif
-
- if (inclink)
- {
- misc_function_vector
- = (struct misc_function *)
- xrealloc (misc_function_vector, (misc_count + misc_function_count)
- * sizeof (struct misc_function));
- j = misc_function_count;
- }
- else
- {
- misc_function_vector
- = (struct misc_function *)
- xxmalloc (misc_count * sizeof (struct misc_function));
- j = 0;
- }
-
- bunch = misc_bunch;
- while (bunch)
- {
- for (i = 0; i < misc_bunch_index; i++)
- {
- misc_function_vector[j] = bunch->contents[i];
- misc_function_vector[j].name
- = obconcat (misc_function_vector[j].name
- + (misc_function_vector[j].name[0] == '_' ? offset : 0),
- "", "");
- j++;
- }
- bunch = bunch->next;
- misc_bunch_index = MISC_BUNCH_SIZE;
- }
-
- if (inclink)
- misc_function_count += misc_count;
- else
- misc_function_count = j;
-
- /* Sort the misc functions by address. */
-
- qsort (misc_function_vector, misc_function_count,
- sizeof (struct misc_function),
- compare_misc_functions);
-}
-
-/* Call sort_syms to sort alphabetically
- the symbols of each block of each symtab. */
-
-static int
-compare_symbols (s1, s2)
- struct symbol **s1, **s2;
-{
- register int namediff;
-
- /* Compare the initial characters. */
- namediff = SYMBOL_NAME (*s1)[0] - SYMBOL_NAME (*s2)[0];
- if (namediff != 0) return namediff;
-
- /* If they match, compare the rest of the names. */
- namediff = strcmp (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2));
- if (namediff != 0) return namediff;
-
- /* For symbols of the same name, registers should come first. */
- return ((SYMBOL_CLASS (*s2) == LOC_REGISTER)
- - (SYMBOL_CLASS (*s1) == LOC_REGISTER));
-}
-
-static void sort_symtab_syms ();
-
-static void
-sort_syms ()
-{
- register struct symtab *s;
-
- for (s = symtab_list; s; s = s->next)
- sort_symtab_syms (s);
-}
-
-static void
-sort_symtab_syms (s)
- register struct symtab *s;
-{
- register struct blockvector *bv = BLOCKVECTOR (s);
- int nbl = BLOCKVECTOR_NBLOCKS (bv);
- int i;
- register struct block *b;
-
- /* Note that in the following sort, we always make sure that
- register debug symbol declarations always come before regular
- debug symbol declarations (as might happen when parameters are
- then put into registers by the compiler). We do this by a
- correct compare in compare_symbols, and by the reversal of the
- symbols if we don't sort. This works as long as a register debug
- symbol always comes after a parameter debug symbol. */
-
- /* This is no longer necessary; lookup_block_symbol now always
- prefers some other declaration over a parameter declaration. We
- still sort the thing (that is necessary), but we don't reverse it
- if we shouldn't sort it. */
-
- for (i = 0; i < nbl; i++)
- {
- b = BLOCKVECTOR_BLOCK (bv, i);
- if (BLOCK_SHOULD_SORT (b))
- qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b),
- sizeof (struct symbol *), compare_symbols);
- }
-}
-
-
-extern struct symtab *psymtab_to_symtab ();
-
-/* The entry point. */
-static CORE_ADDR entry_point;
-
-/* This is the symbol-file command. Read the file, analyze its symbols,
- and add a struct symtab to symtab_list. */
-
-void
-symbol_file_command (name, from_tty)
- char *name;
- int from_tty;
-{
- register int desc;
- DECLARE_FILE_HEADERS;
- struct nlist *nlist;
-
- /* The string table. */
- char *stringtab;
-
- /* The size of the string table (buffer is a bizarre name...). */
- long buffer;
-
- register int val;
- extern void close ();
- struct cleanup *old_chain;
- struct symtab *symseg;
- struct stat statbuf;
-
- dont_repeat ();
-
- if (name == 0)
- {
- if ((symtab_list || partial_symtab_list)
- && from_tty
- && !query ("Discard symbol table? ", 0))
- error ("Not confirmed.");
- if (symfile)
- free (symfile);
- symfile = 0;
- free_all_symtabs ();
- free_all_psymtabs ();
- return;
- }
-
- name = tilde_expand (name);
- make_cleanup (free, name);
-
- if ((symtab_list || partial_symtab_list)
- && !query ("Load new symbol table from \"%s\"? ", name))
- error ("Not confirmed.");
-
- {
- char *absolute_name;
- desc = openp (getenv ("PATH"), 1, name, O_RDONLY, 0, &absolute_name);
- if (desc < 0)
- perror_with_name (name);
- else
- name = absolute_name;
- }
-
- old_chain = make_cleanup (close, desc);
- make_cleanup (free_current_contents, &name);
-
- READ_FILE_HEADERS (desc, name);
-
- entry_point = ENTRY_POINT;
-
- if (NUMBER_OF_SYMBOLS == 0)
- {
- if (symfile)
- free (symfile);
- symfile = 0;
- free_all_symtabs ();
- free_all_psymtabs ();
- printf ("%s has no symbol-table; symbols discarded.\n", name);
- fflush (stdout);
- do_cleanups (old_chain);
- return;
- }
-
- printf ("Reading symbol data from %s...", name);
- fflush (stdout);
-
- /* Now read the string table, all at once. */
- val = lseek (desc, STRING_TABLE_OFFSET, 0);
- if (val < 0)
- perror_with_name (name);
- if (stat (name, &statbuf) == -1)
- perror_with_name (name);
- READ_STRING_TABLE_SIZE (buffer);
- if (buffer >= 0 && buffer < statbuf.st_size)
- {
-#ifdef BROKEN_LARGE_ALLOCA
- stringtab = (char *) xmalloc (buffer);
- make_cleanup (free, stringtab);
-#else
- stringtab = (char *) alloca (buffer);
-#endif
- }
- else
- stringtab = NULL;
- if (stringtab == NULL)
- error ("ridiculous string table size: %d bytes", buffer);
-
- /* Usually READ_STRING_TABLE_SIZE will have shifted the file pointer.
- Occaisionally, it won't. */
- val = lseek (desc, STRING_TABLE_OFFSET, L_SET);
- if (val < 0)
- perror_with_name (name);
- val = myread (desc, stringtab, buffer);
- if (val < 0)
- perror_with_name (name);
-
- /* Throw away the old symbol table. */
-
- if (symfile)
- free (symfile);
- symfile = 0;
- free_all_symtabs ();
- free_all_psymtabs ();
-
- /* Empty the hash table of global syms looking for values. */
- bzero (global_sym_chain, sizeof global_sym_chain);
-
- /* Symsegs are no longer supported by GDB. Setting symseg_chain to
- 0 is easier than finding all the symseg code and eliminating it. */
- symseg_chain = 0;
-
- /* Position to read the symbol table. Do not read it all at once. */
- val = lseek (desc, SYMBOL_TABLE_OFFSET, 0);
- if (val < 0)
- perror_with_name (name);
-
- /* Don't put these on the cleanup chain; they need to stick around
- until the next call to symbol_file_command. *Then* we'll free
- them. */
- free_header_files ();
- init_header_files ();
-
- init_misc_functions ();
- make_cleanup (discard_misc_bunches, 0);
-
- free_pendings = 0;
- pending_blocks = 0;
- file_symbols = 0;
- global_symbols = 0;
- make_cleanup (really_free_pendings, 0);
-
- /* Now that the symbol table data of the executable file are all in core,
- process them and define symbols accordingly. Closes desc. */
-
- read_dbx_symtab (desc, stringtab, buffer, NUMBER_OF_SYMBOLS, 0,
- ADDR_OF_TEXT_SEGMENT, SIZE_OF_TEXT_SEGMENT);
-
- /* Go over the misc functions and install them in vector. */
-
- condense_misc_bunches (0);
-
- /* Don't allow char * to have a typename (else would get caddr_t.) */
-
- TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0;
-
- /* Make a default for file to list. */
-
- symfile = savestring (name, strlen (name));
-
- /* Call to select_source_symtab used to be here; it was using too
- much time. I'll make sure that list_sources can handle the lack
- of current_source_symtab */
-
- do_cleanups (old_chain); /* Descriptor closed here */
-
- /* Free the symtabs made by read_symsegs, but not their contents,
- which have been copied into symtabs on symtab_list. */
- while (symseg_chain)
- {
- register struct symtab *s = symseg_chain->next;
- free (symseg_chain);
- symseg_chain = s;
- }
-
- if (!partial_symtab_list)
- printf ("\n(no debugging symbols found)...");
-
- printf ("done.\n");
- fflush (stdout);
-}
-
-/* Return name of file symbols were loaded from, or 0 if none.. */
-
-char *
-get_sym_file ()
-{
- return symfile;
-}
-
-/* Buffer for reading the symbol table entries. */
-static struct nlist symbuf[4096];
-static int symbuf_idx;
-static int symbuf_end;
-
-/* I/O descriptor for reading the symbol table. */
-static int symtab_input_desc;
-
-/* The address of the string table
- of the object file we are reading (as copied into core). */
-static char *stringtab_global;
-
-/* Refill the symbol table input buffer
- and set the variables that control fetching entries from it.
- Reports an error if no data available.
- This function can read past the end of the symbol table
- (into the string table) but this does no harm. */
-
-static int
-fill_symbuf ()
-{
- int nbytes = myread (symtab_input_desc, symbuf, sizeof (symbuf));
- if (nbytes <= 0)
- error ("error or end of file reading symbol table");
- symbuf_end = nbytes / sizeof (struct nlist);
- symbuf_idx = 0;
- return 1;
-}
-
-/* dbx allows the text of a symbol name to be continued into the
- next symbol name! When such a continuation is encountered
- (a \ at the end of the text of a name)
- call this function to get the continuation. */
-
-static char *
-next_symbol_text ()
-{
- if (symbuf_idx == symbuf_end)
- fill_symbuf ();
- symnum++;
- return symbuf[symbuf_idx++].n_un.n_strx + stringtab_global;
-}
-
-/*
- * Initializes storage for all of the partial symbols that will be
- * created by read_dbx_symtab and subsidiaries.
- */
-void
-init_psymbol_list (total_symbols)
- int total_symbols;
-{
- /* Current best guess is that there are approximately a twentieth
- of the total symbols (in a debugging file) are global or static
- oriented symbols */
- global_psymbols.size = total_symbols / 10;
- static_psymbols.size = total_symbols / 10;
- global_psymbols.next = global_psymbols.list = (struct partial_symbol *)
- xmalloc (global_psymbols.size * sizeof (struct partial_symbol));
- static_psymbols.next = static_psymbols.list = (struct partial_symbol *)
- xmalloc (static_psymbols.size * sizeof (struct partial_symbol));
-}
-
-/*
- * Initialize the list of bincls to contain none and have some
- * allocated.
- */
-static void
-init_bincl_list (number)
- int number;
-{
- bincls_allocated = number;
- next_bincl = bincl_list = (struct header_file_location *)
- xmalloc (bincls_allocated * sizeof(struct header_file_location));
-}
-
-/*
- * Add a bincl to the list.
- */
-static void
-add_bincl_to_list (pst, name, instance)
- struct partial_symtab *pst;
- char *name;
- int instance;
-{
- if (next_bincl >= bincl_list + bincls_allocated)
- {
- int offset = next_bincl - bincl_list;
- bincls_allocated *= 2;
- bincl_list = (struct header_file_location *)
- xrealloc (bincl_list,
- bincls_allocated * sizeof (struct header_file_location));
- next_bincl = bincl_list + offset;
- }
- next_bincl->pst = pst;
- next_bincl->instance = instance;
- next_bincl++->name = name;
-}
-
-/*
- * Given a name, value pair, find the corresponding
- * bincl in the list. Return the partial symtab associated
- * with that header_file_location.
- */
-struct partial_symtab *
-find_corresponding_bincl_psymtab (name, instance)
- char *name;
- int instance;
-{
- struct header_file_location *bincl;
-
- for (bincl = bincl_list; bincl < next_bincl; bincl++)
- if (bincl->instance == instance
- && !strcmp (name, bincl->name))
- return bincl->pst;
-
- return (struct partial_symtab *) 0;
-}
-
-/*
- * Free the storage allocated for the bincl list.
- */
-static void
-free_bincl_list ()
-{
- free (bincl_list);
- bincls_allocated = 0;
-}
-
-static struct partial_symtab *start_psymtab ();
-static void add_psymtab_dependency ();
-static void end_psymtab();
-
-/* Given pointers to an a.out symbol table in core containing dbx
- style data, setup partial_symtab's describing each source file for
- which debugging information is available. NLISTLEN is the number
- of symbols in the symbol table. All symbol names are given as
- offsets relative to STRINGTAB. STRINGTAB_SIZE is the size of
- STRINGTAB.
-
- I have no idea whether or not this routine should be setup to deal
- with inclinks. It seems reasonable to me that they be dealt with
- standardly, so I am not going to make a strong effort to deal with
- them here.
- */
-
-static void
-read_dbx_symtab (desc, stringtab, stringtab_size, nlistlen, inclink,
- text_addr, text_size)
- int desc;
- register char *stringtab;
- register long stringtab_size;
- register int nlistlen;
- int inclink;
- unsigned text_addr;
- int text_size;
-{
- register struct nlist *bufp;
- register char *namestring;
- register struct partial_symbol *psym;
- register struct psymbol_allocation_list *psymbol_struct;
-
- int nsl;
- int past_first_source_file = 0;
- CORE_ADDR last_o_file_start = 0;
- struct cleanup *old_chain;
- char *p;
- enum namespace ns;
- enum address_class class;
-
-#ifdef PROFILE_TYPES
- int i;
- int profile_types [256];
- int strcmp_called = 0;
- int autovars = 0;
- int global_funs = 0;
-#endif
-
- /* Current partial symtab */
- struct partial_symtab *pst;
-
- /* List of current psymtab's include files */
- char **psymtab_include_list;
- int includes_allocated;
- int includes_used;
-
- /* Index within current psymtab dependency list */
- struct partial_symtab **dependency_list;
- int dependencies_used, dependencies_allocated;
-
-#ifdef PROFILE_TYPES
- for (i = 0; i < 256; i++)
- profile_types[i] = 0;
-#endif
-
- stringtab_global = stringtab;
-
- pst = (struct partial_symtab *) 0;
-
- includes_allocated = 30;
- includes_used = 0;
- psymtab_include_list = (char **) alloca (includes_allocated *
- sizeof (char *));
-
- dependencies_allocated = 30;
- dependencies_used = 0;
- dependency_list =
- (struct partial_symtab **) alloca (dependencies_allocated *
- sizeof (struct partial_symtab *));
-
- old_chain = make_cleanup (free_all_psymtabs, 0);
-
- /* Init bincl list */
- init_bincl_list (20);
- make_cleanup (free_bincl_list, 0);
-
- /* Setup global partial symbol list */
- init_psymbol_list (nlistlen);
-
- last_source_file = 0;
-
-#ifdef END_OF_TEXT_DEFAULT
- end_of_text_addr = END_OF_TEXT_DEFAULT;
-#else
- end_of_text_addr = text_addr + text_size;
-#endif
-
- symtab_input_desc = desc; /* This is needed for fill_symbuf below */
- symbuf_end = symbuf_idx = 0;
-
- for (symnum = 0; symnum < nlistlen; symnum++)
- {
- /* Get the symbol for this run and pull out some info */
- QUIT; /* allow this to be interruptable */
- if (symbuf_idx == symbuf_end)
- fill_symbuf ();
- bufp = &symbuf[symbuf_idx++];
-
-#ifdef PROFILE_TYPES
- profile_types[bufp->n_type]++;
-#endif
-
- /*
- * Special case to speed up readin.
- */
- if (bufp->n_type == N_SLINE) continue;
-
- /* Ok. There is a lot of code duplicated in the rest of this
- switch statiement (for efficiency reasons). Since I don't
- like duplicating code, I will do my penance here, and
- describe the code which is duplicated:
-
- *) The assignment to namestring.
- *) The call to index.
- *) The addition of a partial symbol the the two partial
- symbol lists. This last is a large section of code, so
- I've imbedded it in the following macro.
- */
-
-/* Set namestring based on bufp. */
-#define SET_NAMESTRING()\
- if (bufp->n_un.n_strx < 0 || bufp->n_un.n_strx >= stringtab_size) \
- error ("Invalid symbol data: bad string table offset: %d", \
- bufp->n_un.n_strx); \
- namestring = bufp->n_un.n_strx + stringtab
-
-#define ADD_PSYMBOL_TO_LIST(NAME, NAMELENGTH, NAMESPACE, CLASS, LIST, VALUE)\
- do { \
- if ((LIST).next >= \
- (LIST).list + (LIST).size) \
- { \
- (LIST).list = (struct partial_symbol *) \
- xrealloc ((LIST).list, \
- ((LIST).size * 2 \
- * sizeof (struct partial_symbol))); \
- /* Next assumes we only went one over. Should be good if \
- program works correctly */ \
- (LIST).next = \
- (LIST).list + (LIST).size; \
- (LIST).size *= 2; \
- } \
- psym = (LIST).next++; \
- \
- SYMBOL_NAME (psym) = (char *) obstack_alloc (psymbol_obstack, \
- (NAMELENGTH) + 1); \
- strncpy (SYMBOL_NAME (psym), (NAME), (NAMELENGTH)); \
- SYMBOL_NAME (psym)[(NAMELENGTH)] = '\0'; \
- SYMBOL_NAMESPACE (psym) = (NAMESPACE); \
- SYMBOL_CLASS (psym) = (CLASS); \
- SYMBOL_VALUE (psym) = (VALUE); \
- } while (0);
-
-
- switch (bufp->n_type)
- {
- /*
- * Standard, non-debugger, symbols
- */
-
- case N_TEXT | N_EXT:
- /* Catch etext */
-
- SET_NAMESTRING();
-
- if (namestring[6] == '\0' && namestring[5] == 't'
- && namestring[4] == 'x' && namestring[3] == 'e'
- && namestring[2] == 't' && namestring[1] == 'e'
- && namestring[0] == '_')
- end_of_text_addr = bufp->n_value;
-
- /* Figure out beginning and end of global linker symbol
- section and put non-debugger specified symbols on
- tmp_symchain */
-
- last_global_sym = symnum;
- if (!first_global_sym) first_global_sym = symnum;
-
- record_misc_function (namestring, bufp->n_value,
- bufp->n_type); /* Always */
-
- continue;
-
-#ifdef N_NBTEXT
- case N_NBTEXT | N_EXT:
-#endif
-#ifdef N_NBDATA
- case N_NBDATA | N_EXT:
-#endif
-#ifdef N_NBBSS
- case N_NBBSS | N_EXT:
-#endif
-#ifdef N_SETV
- case N_SETV | N_EXT:
-#endif
- case N_ABS | N_EXT:
- case N_DATA | N_EXT:
- case N_BSS | N_EXT:
- /* Figure out beginning and end of global linker symbol
- section and put non-debugger specified symbols on
- tmp_symchain */
-
- SET_NAMESTRING();
-
- last_global_sym = symnum;
- if (!first_global_sym) first_global_sym = symnum;
-
- /* Not really a function here, but... */
- record_misc_function (namestring, bufp->n_value,
- bufp->n_type); /* Always */
-
- continue;
-
-#ifdef N_NBTEXT
- case N_NBTEXT:
-#endif
-
- /* We need to be able to deal with both N_FN or N_TEXT,
- because we have no way of knowing whether the sys-supplied ld
- or GNU ld was used to make the executable. */
-/* #ifdef OFILE_FN_FLAGGED */
-#if ! (N_FN & N_EXT)
- case N_FN:
-#endif
- case N_FN | N_EXT:
-/* #else */
- case N_TEXT:
-/* #endif */
- SET_NAMESTRING();
- if ((namestring[0] == '-' && namestring[1] == 'l')
- || (namestring [(nsl = strlen (namestring)) - 1] == 'o'
- && namestring [nsl - 2] == '.'))
- {
- if (entry_point < bufp->n_value
- && entry_point >= last_o_file_start)
- {
- startup_file_start = last_o_file_start;
- startup_file_end = bufp->n_value;
- }
- if (past_first_source_file && pst)
- {
- end_psymtab (pst, psymtab_include_list, includes_used,
- symnum * sizeof (struct nlist), bufp->n_value,
- dependency_list, dependencies_used,
- global_psymbols.next, static_psymbols.next);
- pst = (struct partial_symtab *) 0;
- includes_used = 0;
- dependencies_used = 0;
- }
- else
- past_first_source_file = 1;
- last_o_file_start = bufp->n_value;
- }
- continue;
-
-#if 0
- /* See comments at N_FN above. */
-#ifdef OFILE_FN_FLAGGED
- case N_TEXT:
-#else
-#if ! (N_FN & N_EXT)
- case N_FN:
-#endif
- case N_FN | N_EXT:
-#endif
-#endif /* 0 */
- case N_UNDF:
- case N_UNDF | N_EXT:
- case N_ABS:
- case N_DATA:
- case N_BSS:
-#ifdef N_NBDATA
- case N_NBDATA:
-#endif
-#ifdef N_NBBSS
- case N_NBBSS:
-#endif
-
- /* Keep going . . .*/
-
- /*
- * Special symbol types for GNU
- */
-#ifdef N_INDR
- case N_INDR:
- case N_INDR | N_EXT:
-#endif
-#ifdef N_SETA
- case N_SETA:
- case N_SETA | N_EXT:
- case N_SETT:
- case N_SETT | N_EXT:
- case N_SETD:
- case N_SETD | N_EXT:
- case N_SETB:
- case N_SETB | N_EXT:
- case N_SETV:
-#endif
- continue;
-
- /*
- * Debugger symbols
- */
-
- case N_SO:
- /* End the current partial symtab and start a new one */
-
- SET_NAMESTRING();
-
- if (pst && past_first_source_file)
- {
- end_psymtab (pst, psymtab_include_list, includes_used,
- symnum * sizeof (struct nlist), bufp->n_value,
- dependency_list, dependencies_used,
- global_psymbols.next, static_psymbols.next);
- pst = (struct partial_symtab *) 0;
- includes_used = 0;
- dependencies_used = 0;
- }
- else
- past_first_source_file = 1;
-
- pst = start_psymtab (namestring, bufp->n_value,
- symnum * sizeof (struct nlist),
- global_psymbols.next, static_psymbols.next);
-
- continue;
-
-#ifdef N_BINCL
- case N_BINCL:
- /* Add this bincl to the bincl_list for future EXCLs. No
- need to save the string; it'll be around until
- read_dbx_symtab function return */
-
- SET_NAMESTRING();
-
- add_bincl_to_list (pst, namestring, bufp->n_value);
-
- /* Mark down an include file in the current psymtab */
-
- psymtab_include_list[includes_used++] = namestring;
- if (includes_used >= includes_allocated)
- {
- char **orig = psymtab_include_list;
-
- psymtab_include_list = (char **)
- alloca ((includes_allocated *= 2) *
- sizeof (char *));
- bcopy (orig, psymtab_include_list,
- includes_used * sizeof (char *));
- }
-
- continue;
-#endif
-
- case N_SOL:
- /* Mark down an include file in the current psymtab */
-
- SET_NAMESTRING();
-
- /* In C++, one may expect the same filename to come round many
- times, when code is coming alternately from the main file
- and from inline functions in other files. So I check to see
- if this is a file we've seen before.
-
- This seems to be a lot of time to be spending on N_SOL, but
- things like "break expread.y:435" need to work (I
- suppose the psymtab_include_list could be hashed or put
- in a binary tree, if profiling shows this is a major hog). */
- {
- register int i;
- for (i = 0; i < includes_used; i++)
- if (!strcmp (namestring, psymtab_include_list[i]))
- {
- i = -1;
- break;
- }
- if (i == -1)
- continue;
- }
-
- psymtab_include_list[includes_used++] = namestring;
- if (includes_used >= includes_allocated)
- {
- char **orig = psymtab_include_list;
-
- psymtab_include_list = (char **)
- alloca ((includes_allocated *= 2) *
- sizeof (char *));
- bcopy (orig, psymtab_include_list,
- includes_used * sizeof (char *));
- }
- continue;
-
- case N_LSYM: /* Typedef or automatic variable. */
- SET_NAMESTRING();
-
- p = (char *) index (namestring, ':');
-
- /* Skip if there is no :. */
- if (!p) continue;
-
- switch (p[1])
- {
- case 'T':
- ADD_PSYMBOL_TO_LIST (namestring, p - namestring,
- STRUCT_NAMESPACE, LOC_TYPEDEF,
- static_psymbols, bufp->n_value);
- goto check_enum;
- case 't':
- ADD_PSYMBOL_TO_LIST (namestring, p - namestring,
- VAR_NAMESPACE, LOC_TYPEDEF,
- static_psymbols, bufp->n_value);
- check_enum:
- /* If this is an enumerated type, we need to
- add all the enum constants to the partial symbol
- table. This does not cover enums without names, e.g.
- "enum {a, b} c;" in C, but fortunately those are
- rare. There is no way for GDB to find those from the
- enum type without spending too much time on it. Thus
- to solve this problem, the compiler needs to put out separate
- constant symbols ('c' N_LSYMS) for enum constants in
- enums without names. */
-
- /* We are looking for something of the form
- <name> ":" ("t" | "T") [<number> "="] "e"
- {<constant> ":" <value> ","} ";". */
-
- /* Skip over the colon and the 't' or 'T'. */
- p += 2;
- /* This type may be given a number. Skip over it. */
- while ((*p >= '0' && *p <= '9')
- || *p == '=')
- p++;
-
- if (*p++ == 'e')
- {
- /* We have found an enumerated type. */
- /* According to comments in read_enum_type
- a comma could end it instead of a semicolon.
- I don't know where that happens.
- Accept either. */
- while (*p && *p != ';' && *p != ',')
- {
- char *q;
-
- /* Check for and handle cretinous dbx symbol name
- continuation! */
- if (*p == '\\')
- p = next_symbol_text ();
-
- /* Point to the character after the name
- of the enum constant. */
- for (q = p; *q && *q != ':'; q++)
- ;
- /* Note that the value doesn't matter for
- enum constants in psymtabs, just in symtabs. */
- ADD_PSYMBOL_TO_LIST (p, q - p,
- VAR_NAMESPACE, LOC_CONST,
- static_psymbols, 0);
- /* Point past the name. */
- p = q;
- /* Skip over the value. */
- while (*p && *p != ',')
- p++;
- /* Advance past the comma. */
- if (*p)
- p++;
- }
- }
-
- continue;
- case 'c':
- /* Constant, e.g. from "const" in Pascal. */
- ADD_PSYMBOL_TO_LIST (namestring, p - namestring,
- VAR_NAMESPACE, LOC_CONST,
- static_psymbols, bufp->n_value);
- continue;
- default:
-#ifdef PROFILE_TYPES
- if (isalpha(p[1]))
- printf ("Funny...LSYM with a letter that isn't a type\n");
- autovars++;
-#endif
- /* Skip if the thing following the : is
- not a letter (which indicates declaration of a local
- variable, which we aren't interested in). */
- continue;
- }
-
- case N_FUN:
-#if 0
- /* This special-casing of N_FUN is just wrong; N_FUN
- does not mean "function"; it means "text segment".
- So N_FUN can go with 'V', etc. as well as 'f' or 'F'. */
-
- SET_NAMESTRING();
-
- p = (char *) index (namestring, ':');
-
- if (!p || p[1] == 'F') continue;
-
-#ifdef PROFILE_TYPES
- if (p[1] != 'f')
- printf ("Funny...FUN with a letter that isn't 'F' or 'f'.\n");
- global_funs++;
-#endif
-
- ADD_PSYMBOL_TO_LIST (namestring, p - namestring,
- VAR_NAMESPACE, LOC_BLOCK,
- static_psymbols, bufp->n_value);
-
- continue;
-#endif /* 0 */
- case N_GSYM: /* Global (extern) variable; can be
- data or bss (sigh). */
- case N_STSYM: /* Data seg var -- static */
- case N_LCSYM: /* BSS " */
-
- /* Following may probably be ignored; I'll leave them here
- for now (until I do Pascal and Modula 2 extensions). */
-
- case N_PC: /* I may or may not need this; I
- suspect not. */
-#ifdef N_M2C
- case N_M2C: /* I suspect that I can ignore this here. */
- case N_SCOPE: /* Same. */
-#endif
-
- SET_NAMESTRING();
-
- p = (char *) index (namestring, ':');
- if (!p)
- continue; /* Not a debugging symbol. */
-
- process_symbol_for_psymtab:
-
- /* Main processing section for debugging symbols which
- the initial read through the symbol tables needs to worry
- about. If we reach this point, the symbol which we are
- considering is definitely one we are interested in.
- p must also contain the (valid) index into the namestring
- which indicates the debugging type symbol. */
-
- switch (p[1])
- {
- case 'c':
- ADD_PSYMBOL_TO_LIST (namestring, p - namestring,
- VAR_NAMESPACE, LOC_CONST,
- static_psymbols, bufp->n_value);
- continue;
- case 'S':
- ADD_PSYMBOL_TO_LIST (namestring, p - namestring,
- VAR_NAMESPACE, LOC_STATIC,
- static_psymbols, bufp->n_value);
- continue;
- case 'G':
- ADD_PSYMBOL_TO_LIST (namestring, p - namestring,
- VAR_NAMESPACE, LOC_EXTERNAL,
- global_psymbols, bufp->n_value);
- continue;
-
- case 't':
- ADD_PSYMBOL_TO_LIST (namestring, p - namestring,
- VAR_NAMESPACE, LOC_TYPEDEF,
- global_psymbols, bufp->n_value);
- continue;
-
- case 'f':
- ADD_PSYMBOL_TO_LIST (namestring, p - namestring,
- VAR_NAMESPACE, LOC_BLOCK,
- static_psymbols, bufp->n_value);
- continue;
-
- /* Two things show up here (hopefully); static symbols of
- local scope (static used inside braces) or extensions
- of structure symbols. We can ignore both. */
- case 'V':
- case '(':
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- case '8':
- case '9':
- /* Global functions are ignored here. I'm not
- sure what psymtab they go into (or just the misc
- function vector). */
- case 'F':
- continue;
-
- default:
- fatal ("Internal error: Unexpected debugging symbol type '%c' at symnum %d.\n",
- p[1], symnum);
- }
-
-#ifdef N_BINCL
- case N_EXCL:
-
- SET_NAMESTRING();
-
- /* Find the corresponding bincl and mark that psymtab on the
- psymtab dependency list */
- {
- struct partial_symtab *needed_pst =
- find_corresponding_bincl_psymtab (namestring, bufp->n_value);
-
- /* If this include file was defined earlier in this file,
- leave it alone. */
- if (needed_pst == pst) continue;
-
- if (needed_pst)
- {
- int i;
- int found = 0;
-
- for (i = 0; i < dependencies_used; i++)
- if (dependency_list[i] == needed_pst)
- {
- found = 1;
- break;
- }
-
- /* If it's already in the list, skip the rest. */
- if (found) continue;
-
- dependency_list[dependencies_used++] = needed_pst;
- if (dependencies_used >= dependencies_allocated)
- {
- struct partial_symtab **orig = dependency_list;
- dependency_list =
- (struct partial_symtab **)
- alloca ((dependencies_allocated *= 2)
- * sizeof (struct partial_symtab *));
- bcopy (orig, dependency_list,
- (dependencies_used
- * sizeof (struct partial_symtab *)));
-#ifdef DEBUG_INFO
- fprintf (stderr, "Had to reallocate dependency list.\n");
- fprintf (stderr, "New dependencies allocated: %d\n",
- dependencies_allocated);
-#endif
- }
- }
- else
- error ("Invalid symbol data: \"repeated\" header file not previously seen, at symtab pos %d.",
- symnum);
- }
- continue;
-
- case N_EINCL:
-#endif
-#ifdef N_DSLINE
- case N_DSLINE:
-#endif
-#ifdef N_BSLINE
- case N_BSLINE:
-#endif
- case N_SSYM: /* Claim: Structure or union element.
- Hopefully, I can ignore this. */
- case N_ENTRY: /* Alternate entry point; can ignore. */
-#ifdef N_MAIN
- case N_MAIN: /* Can definitely ignore this. */
-#endif
- case N_LENG:
- case N_BCOMM:
- case N_ECOMM:
- case N_ECOML:
- case N_FNAME:
- case N_SLINE:
- case N_RSYM:
- case N_PSYM:
- case N_LBRAC:
- case N_RBRAC:
- /* These symbols aren't interesting; don't worry about them */
-
- continue;
-
- default:
- /* If we haven't found it yet, we've got problems */
-
- if (IGNORE_SYMBOL (bufp->n_type))
- continue;
-
- fatal ("Bad symbol type 0x%x encountered in gdb scan", bufp->n_type);
- }
- }
-
- /* If there's stuff to be cleaned up, clean it up. */
- if (entry_point < bufp->n_value
- && entry_point >= last_o_file_start)
- {
- startup_file_start = last_o_file_start;
- startup_file_end = bufp->n_value;
- }
-
- if (pst)
- {
- end_psymtab (pst, psymtab_include_list, includes_used,
- symnum * sizeof (struct nlist), end_of_text_addr,
- dependency_list, dependencies_used,
- global_psymbols.next, static_psymbols.next);
- includes_used = 0;
- dependencies_used = 0;
- pst = (struct partial_symtab *) 0;
- }
-
- free_bincl_list ();
- discard_cleanups (old_chain);
-#ifdef PROFILE_TYPES
- {
- int i, j;
-#define __define_stab(SYM, NUMBER, NAME) {NUMBER, NAME},
- static struct xyzzy {
- unsigned char symnum;
- char *name;
- } tmp_list[] = {
-#include "stab.def"
- {0x1, "eREF"},
- {0x2, "ABS"},
- {0x3, "eABS"},
- {0x4, "TEXT"},
- {0x5, "eTEXT"},
- {0x6, "DATA"},
- {0x7, "eDATA"},
- {0x8, "BSS"},
- {0x9, "eBSS"},
- {0x12, "COMM"},
- {0x13, "eCOMM"},
- {0x1f, "FN"},
- {0, "Unknown"},
-};
- for (i = 0; i < 256; i++)
- {
- for (j = 0; j < (sizeof (tmp_list) / sizeof (struct xyzzy)) - 1; j++)
- if (tmp_list[j].symnum == i)
- break;
- printf ("Symbol \"%s\" (0x%x) occured %d times.\n",
- tmp_list[j].name, i, profile_types[i]);
- }
- printf ("Auto vars (under LSYM): %d\n", autovars);
- printf ("Global funs (under FUN): %d\n", global_funs);
- }
-#endif
-}
-
-/*
- * Allocate and partially fill a partial symtab. It will be
- * completely filled at the end of the symbol list.
- */
-static struct partial_symtab *
-start_psymtab (filename, textlow, ldsymoff, global_syms, static_syms)
- char *filename;
- int textlow;
- int ldsymoff;
- struct partial_symbol *global_syms;
- struct partial_symbol *static_syms;
-{
- struct partial_symtab *result =
- (struct partial_symtab *) obstack_alloc (psymbol_obstack,
- sizeof (struct partial_symtab));
-
- result->filename =
- (char *) obstack_alloc (psymbol_obstack,
- strlen (filename) + 1);
- strcpy (result->filename, filename);
-
- result->textlow = textlow;
- result->ldsymoff = ldsymoff;
-
- result->readin = 0;
-
- result->globals_offset = global_syms - global_psymbols.list;
- result->statics_offset = static_syms - static_psymbols.list;
-
- result->n_global_syms = 0;
- result->n_static_syms = 0;
-
- return result;
-}
-
-static int
-compare_psymbols (s1, s2)
- register struct partial_symbol *s1, *s2;
-{
- register char
- *st1 = SYMBOL_NAME (s1),
- *st2 = SYMBOL_NAME (s2);
-
- return (st1[0] - st2[0] ? st1[0] - st2[0] :
- strcmp (st1 + 1, st2 + 1));
-}
-
-
-/* Close off the current usage of a partial_symbol table entry. This
- involves setting the correct number of includes (with a realloc),
- setting the high text mark, setting the symbol length in the
- executable, and setting the length of the global and static lists
- of psymbols.
-
- The global symbols and static symbols are then seperately sorted.
-
- Then the partial symtab is put on the global list.
- *** List variables and peculiarities of same. ***
- */
-static void
-end_psymtab (pst, include_list, num_includes, capping_symbol_offset,
- capping_text, dependency_list, number_dependencies,
- capping_global, capping_static)
- struct partial_symtab *pst;
- char **include_list;
- int num_includes;
- int capping_symbol_offset;
- int capping_text;
- struct partial_symtab **dependency_list;
- int number_dependencies;
- struct partial_symbol *capping_global, *capping_static;
-{
- int i;
-
- pst->ldsymlen = capping_symbol_offset - pst->ldsymoff;
- pst->texthigh = capping_text;
-
- pst->n_global_syms =
- capping_global - (global_psymbols.list + pst->globals_offset);
- pst->n_static_syms =
- capping_static - (static_psymbols.list + pst->statics_offset);
-
- pst->dependencies = (struct partial_symtab **)
- obstack_alloc (psymbol_obstack,
- number_dependencies * sizeof (struct partial_symtab *));
- bcopy (dependency_list, pst->dependencies,
- number_dependencies * sizeof (struct partial_symtab *));
- pst->number_of_dependencies = number_dependencies;
-
- for (i = 0; i < num_includes; i++)
- {
- /* Eventually, put this on obstack */
- struct partial_symtab *subpst =
- (struct partial_symtab *)
- obstack_alloc (psymbol_obstack,
- sizeof (struct partial_symtab));
-
- subpst->filename =
- (char *) obstack_alloc (psymbol_obstack,
- strlen (include_list[i]) + 1);
- strcpy (subpst->filename, include_list[i]);
-
- subpst->ldsymoff =
- subpst->ldsymlen =
- subpst->textlow =
- subpst->texthigh = 0;
- subpst->readin = 0;
-
- subpst->dependencies = (struct partial_symtab **)
- obstack_alloc (psymbol_obstack,
- sizeof (struct partial_symtab *));
- subpst->dependencies[0] = pst;
- subpst->number_of_dependencies = 1;
-
- subpst->globals_offset =
- subpst->n_global_syms =
- subpst->statics_offset =
- subpst->n_static_syms = 0;
-
- subpst->next = partial_symtab_list;
- partial_symtab_list = subpst;
- }
-
- /* Sort the global list; don't sort the static list */
- qsort (global_psymbols.list + pst->globals_offset, pst->n_global_syms,
- sizeof (struct partial_symbol), compare_psymbols);
-
- /* Put the psymtab on the psymtab list */
- pst->next = partial_symtab_list;
- partial_symtab_list = pst;
-}
-
-
-/* Helper routines for psymtab_to_symtab. */
-static void scan_file_globals ();
-static void read_ofile_symtab ();
-
-static void
-psymtab_to_symtab_1 (pst, desc, stringtab, stringtab_size, sym_offset)
- struct partial_symtab *pst;
- int desc;
- char *stringtab;
- int stringtab_size;
- int sym_offset;
-{
- struct cleanup *old_chain;
- int i;
-
- if (!pst)
- return;
-
- if (pst->readin)
- {
- fprintf (stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
- pst->filename);
- return;
- }
-
- /* Read in all partial symbtabs on which this one is dependent */
- for (i = 0; i < pst->number_of_dependencies; i++)
- if (!pst->dependencies[i]->readin)
- {
- /* Inform about additional files that need to be read in. */
- if (info_verbose)
- {
- printf_filtered (" and %s...", pst->dependencies[i]->filename);
- fflush (stdout);
- }
- psymtab_to_symtab_1 (pst->dependencies[i], desc,
- stringtab, stringtab_size, sym_offset);
- }
-
- if (pst->ldsymlen) /* Otherwise it's a dummy */
- {
- /* Init stuff necessary for reading in symbols */
- free_pendings = 0;
- pending_blocks = 0;
- file_symbols = 0;
- global_symbols = 0;
- old_chain = make_cleanup (really_free_pendings, 0);
-
- /* Read in this files symbols */
- lseek (desc, sym_offset, L_SET);
- read_ofile_symtab (desc, stringtab, stringtab_size,
- pst->ldsymoff,
- pst->ldsymlen, pst->textlow,
- pst->texthigh - pst->textlow, 0);
- sort_symtab_syms (symtab_list); /* At beginning since just added */
-
- do_cleanups (old_chain);
- }
-
- pst->readin = 1;
-}
-
-/*
- * Read in all of the symbols for a given psymtab for real. Return
- * the value of the symtab you create. Do not free the storage
- * allocated to the psymtab; it may have pointers to it.
- */
-struct symtab *
-psymtab_to_symtab(pst)
- struct partial_symtab *pst;
-{
- int desc;
- DECLARE_FILE_HEADERS;
- char *stringtab;
- struct partial_symtab **list_patch;
- int stsize, val;
- struct stat statbuf;
- struct cleanup *old_chain;
- extern void close ();
- int i;
- struct symtab *result;
- char *name = symfile; /* Some of the macros require the */
- /* variable "name" to be defined in */
- /* the context in which they execute */
- /* (Yech!) */
-
- if (!pst)
- return 0;
-
- if (pst->readin)
- {
- fprintf (stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
- pst->filename);
- return 0;
- }
-
- if (!name)
- error("No symbol file currently specified; use command symbol-file");
-
- if (pst->ldsymlen || pst->number_of_dependencies)
- {
- /* Print the message now, before reading the string table,
- to avoid disconcerting pauses. */
- if (info_verbose)
- {
- printf_filtered ("Reading in symbols for %s...", pst->filename);
- fflush (stdout);
- }
-
- /* Open symbol file and read in string table */
- if (stat (name, &statbuf) < 0)
- perror_with_name (name);
- desc = open(name, O_RDONLY, 0); /* symbol_file_command
- guarrantees that the symbol file name
- will be absolute, so there is no
- need for openp */
-
- old_chain = make_cleanup (close, desc);
-
- if (desc < 0)
- error("Symbol file not readable");
-
- READ_FILE_HEADERS (desc, name);
-
- /* Read in the string table */
- lseek (desc, STRING_TABLE_OFFSET, L_SET);
- READ_STRING_TABLE_SIZE (stsize);
- if (stsize >= 0 && stsize < statbuf.st_size)
- {
-#ifdef BROKEN_LARGE_ALLOCA
- stringtab = (char *) xmalloc (stsize);
- make_cleanup (free, stringtab);
-#else
- stringtab = (char *) alloca (stsize);
-#endif
- }
- else
- stringtab = NULL;
- if (stringtab == NULL)
- error ("ridiculous string table size: %d bytes", stsize);
-
- /* Usually READ_STRING_TABLE_SIZE will have shifted the file pointer.
- Occaisionally, it won't. */
- val = lseek (desc, STRING_TABLE_OFFSET, L_SET);
- if (val < 0)
- perror_with_name (name);
- val = myread (desc, stringtab, stsize);
- if (val < 0)
- perror_with_name (name);
-
- psymtab_to_symtab_1 (pst, desc, stringtab, stsize,
- SYMBOL_TABLE_OFFSET);
-
- /* Match with global symbols. This only needs to be done once,
- after all of the symtabs and dependencies have been read in. */
- scan_file_globals ();
-
- do_cleanups (old_chain);
-
- /* Finish up the debug error message. */
- if (info_verbose)
- printf_filtered ("done.\n");
- }
-
- /* Search through list for correct name. */
- for (result = symtab_list; result; result = result->next)
- if (!strcmp (result->filename, pst->filename))
- return result;
-
- return 0;
-}
-
-/*
- * Scan through all of the global symbols defined in the object file,
- * assigning values to the debugging symbols that need to be assigned
- * to. Get these symbols from the misc function list.
- */
-static void
-scan_file_globals ()
-{
- int hash;
- int mf;
-
- for (mf = 0; mf < misc_function_count; mf++)
- {
- char *namestring = misc_function_vector[mf].name;
- struct symbol *sym, *prev;
-
- QUIT;
-
- prev = (struct symbol *) 0;
-
- /* Get the hash index and check all the symbols
- under that hash index. */
-
- hash = hashname (namestring);
-
- for (sym = global_sym_chain[hash]; sym;)
- {
- if (*namestring == SYMBOL_NAME (sym)[0]
- && !strcmp(namestring + 1, SYMBOL_NAME (sym) + 1))
- {
- /* Splice this symbol out of the hash chain and
- assign the value we have to it. */
- if (prev)
- SYMBOL_VALUE (prev) = SYMBOL_VALUE (sym);
- else
- global_sym_chain[hash]
- = (struct symbol *) SYMBOL_VALUE (sym);
-
- /* Check to see whether we need to fix up a common block. */
- /* Note: this code might be executed several times for
- the same symbol if there are multiple references. */
- if (SYMBOL_CLASS (sym) == LOC_BLOCK)
- fix_common_block (sym, misc_function_vector[mf].address);
- else
- SYMBOL_VALUE (sym) = misc_function_vector[mf].address;
-
- if (prev)
- sym = (struct symbol *) SYMBOL_VALUE (prev);
- else
- sym = global_sym_chain[hash];
- }
- else
- {
- prev = sym;
- sym = (struct symbol *) SYMBOL_VALUE (sym);
- }
- }
- }
-}
-
-/*
- * Read in a defined section of a specific object file's symbols.
- *
- * DESC is the file descriptor for the file, positioned at the
- * beginning of the symtab
- * STRINGTAB is a pointer to the files string
- * table, already read in
- * SYM_OFFSET is the offset within the file of
- * the beginning of the symbols we want to read, NUM_SUMBOLS is the
- * number of symbols to read
- * TEXT_OFFSET is the offset to be added to
- * all values of symbols coming in and
- * TEXT_SIZE is the size of the text segment read in.
- * OFFSET is a flag which indicates that the value of all of the
- * symbols should be offset by TEXT_OFFSET (for the purposes of
- * incremental linking).
- */
-
-static void
-read_ofile_symtab (desc, stringtab, stringtab_size, sym_offset,
- sym_size, text_offset, text_size, offset)
- int desc;
- register char *stringtab;
- int sym_offset;
- int sym_size;
- int text_offset;
- int text_size;
- int offset;
-{
- register char *namestring;
- register struct symbol *sym, *prev;
- int hash;
- struct cleanup *old_chain;
- struct nlist *bufp;
- unsigned char type;
-#ifdef N_BINCL
- subfile_stack = 0;
-#endif
-
- stringtab_global = stringtab;
- last_source_file = 0;
-
- symtab_input_desc = desc;
- symbuf_end = symbuf_idx = 0;
-
- /* It is necessary to actually read one symbol *before* the start
- of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
- occurs before the N_SO symbol.
-
- Detecting this in read_dbx_symtab
- would slow down initial readin, so we look for it here instead. */
- if (sym_offset >= sizeof (struct nlist))
- {
- lseek (desc, sym_offset - sizeof (struct nlist), L_INCR);
- fill_symbuf ();
- bufp = &symbuf[symbuf_idx++];
-
- if (bufp->n_un.n_strx < 0 || bufp->n_un.n_strx >= stringtab_size)
- error ("Invalid symbol data: bad string table offset: %d",
- bufp->n_un.n_strx);
- namestring = bufp->n_un.n_strx + stringtab;
-
- processing_gcc_compilation =
- (bufp->n_type == N_TEXT
- && !strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL));
- }
- else
- {
- /* The N_SO starting this symtab is the first symbol, so we
- better not check the symbol before it. I'm not this can
- happen, but it doesn't hurt to check for it. */
- lseek(desc, sym_offset, L_INCR);
- processing_gcc_compilation = 0;
- }
-
- if (symbuf_idx == symbuf_end)
- fill_symbuf();
- bufp = &symbuf[symbuf_idx];
- if ((unsigned char) bufp->n_type != N_SO)
- fatal("First symbol in segment of executable not a source symbol");
-
- for (symnum = 0;
- symnum < sym_size / sizeof(struct nlist);
- symnum++)
- {
- QUIT; /* Allow this to be interruptable */
- if (symbuf_idx == symbuf_end)
- fill_symbuf();
- bufp = &symbuf[symbuf_idx++];
- type = bufp->n_type;
-
- if (offset &&
- (type == N_TEXT || type == N_DATA || type == N_BSS))
- bufp->n_value += text_offset;
-
- if (bufp->n_un.n_strx < 0 || bufp->n_un.n_strx >= stringtab_size)
- error ("Invalid symbol data: bad string table offset: %d",
- bufp->n_un.n_strx);
- namestring = bufp->n_un.n_strx + stringtab;
-
- if (type & N_STAB)
- process_one_symbol(type, bufp->n_desc,
- bufp->n_value, namestring);
- /* We skip checking for a new .o or -l file; that should never
- happen in this routine. */
- else if (type == N_TEXT
- && !strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL))
- /* I don't think this code will ever be executed, because
- the GCC_COMPILED_FLAG_SYMBOL usually is right before
- the N_SO symbol which starts this source file.
- However, there is no reason not to accept
- the GCC_COMPILED_FLAG_SYMBOL anywhere. */
- processing_gcc_compilation = 1;
- else if (type & N_EXT || type == N_TEXT
-#ifdef N_NBTEXT
- || type == N_NBTEXT
-#endif
- )
- /* Global symbol: see if we came across a dbx defintion for
- a corresponding symbol. If so, store the value. Remove
- syms from the chain when their values are stored, but
- search the whole chain, as there may be several syms from
- different files with the same name. */
- /* This is probably not true. Since the files will be read
- in one at a time, each reference to a global symbol will
- be satisfied in each file as it appears. So we skip this
- section. */
- &stringtab_global; /* For debugger; am I right? */
- }
- end_symtab (text_offset + text_size);
-}
-
-static int
-hashname (name)
- char *name;
-{
- register char *p = name;
- register int total = p[0];
- register int c;
-
- c = p[1];
- total += c << 2;
- if (c)
- {
- c = p[2];
- total += c << 4;
- if (c)
- total += p[3] << 6;
- }
-
- /* Ensure result is positive. */
- if (total < 0) total += (1000 << 6);
- return total % HASHSIZE;
-}
-
-/* Put all appropriate global symbols in the symseg data
- onto the hash chains so that their addresses will be stored
- when seen later in loader global symbols. */
-
-static void
-hash_symsegs ()
-{
- /* Look at each symbol in each block in each symseg symtab. */
- struct symtab *s;
- for (s = symseg_chain; s; s = s->next)
- {
- register int n;
- for (n = BLOCKVECTOR_NBLOCKS (BLOCKVECTOR (s)) - 1; n >= 0; n--)
- {
- register struct block *b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), n);
- register int i;
- for (i = BLOCK_NSYMS (b) - 1; i >= 0; i--)
- {
- register struct symbol *sym = BLOCK_SYM (b, i);
-
- /* Put the symbol on a chain if its value is an address
- that is figured out by the loader. */
-
- if (SYMBOL_CLASS (sym) == LOC_EXTERNAL)
- {
- register int hash = hashname (SYMBOL_NAME (sym));
- SYMBOL_VALUE (sym) = (int) global_sym_chain[hash];
- global_sym_chain[hash] = sym;
- SYMBOL_CLASS (sym) = LOC_STATIC;
- }
- }
- }
- }
-}
-
-static void
-process_one_symbol (type, desc, value, name)
- int type, desc;
- CORE_ADDR value;
- char *name;
-{
- register struct context_stack *new;
- char *colon_pos;
-
- /* Something is wrong if we see real data before
- seeing a source file name. */
-
- if (last_source_file == 0 && type != N_SO)
- {
- /* Currently this ignores N_ENTRY on Gould machines, N_NSYM on machines
- where that code is defined. */
- if (IGNORE_SYMBOL (type))
- return;
-
- error ("Invalid symbol data: does not start by identifying a source file.");
- }
-
- switch (type)
- {
- case N_FUN:
- case N_FNAME:
- /* Either of these types of symbols indicates the start of
- a new function. We must process its "name" normally for dbx,
- but also record the start of a new lexical context, and possibly
- also the end of the lexical context for the previous function. */
- /* This is not always true. This type of symbol may indicate a
- text segment variable. */
-
- colon_pos = index (name, ':');
- if (!colon_pos++
- || (*colon_pos != 'f' && *colon_pos != 'F'))
- {
- define_symbol (value, name, desc);
- break;
- }
-
- within_function = 1;
- if (context_stack_depth > 0)
- {
- new = &context_stack[--context_stack_depth];
- /* Make a block for the local symbols within. */
- finish_block (new->name, &local_symbols, new->old_blocks,
- new->start_addr, value);
- }
- /* Stack must be empty now. */
- if (context_stack_depth != 0)
- error ("Invalid symbol data: unmatched N_LBRAC before symtab pos %d.",
- symnum);
-
- new = &context_stack[context_stack_depth++];
- new->old_blocks = pending_blocks;
- new->start_addr = value;
- new->name = define_symbol (value, name, desc);
- local_symbols = 0;
- break;
-
- case N_LBRAC:
- /* This "symbol" just indicates the start of an inner lexical
- context within a function. */
-
- if (context_stack_depth == context_stack_size)
- {
- context_stack_size *= 2;
- context_stack = (struct context_stack *)
- xrealloc (context_stack,
- (context_stack_size
- * sizeof (struct context_stack)));
- }
-
- new = &context_stack[context_stack_depth++];
- new->depth = desc;
- new->locals = local_symbols;
- new->old_blocks = pending_blocks;
- new->start_addr = value;
- new->name = 0;
- local_symbols = 0;
- break;
-
- case N_RBRAC:
- /* This "symbol" just indicates the end of an inner lexical
- context that was started with N_LBRAC. */
- new = &context_stack[--context_stack_depth];
- if (desc != new->depth)
- error ("Invalid symbol data: N_LBRAC/N_RBRAC symbol mismatch, symtab pos %d.", symnum);
-
- /* Some native compilers put the variable decls inside of an
- LBRAC/RBRAC block. This macro should be nonzero if this
- is true. DESC is N_DESC from the N_RBRAC symbol. */
-#if !defined (VARIABLES_INSIDE_BLOCK)
-#define VARIABLES_INSIDE_BLOCK(desc) 0
-#endif
-
- /* Can only use new->locals as local symbols here if we're in
- gcc or on a machine that puts them before the lbrack. */
- if (!VARIABLES_INSIDE_BLOCK(desc))
- local_symbols = new->locals;
-
- /* If this is not the outermost LBRAC...RBRAC pair in the
- function, its local symbols preceded it, and are the ones
- just recovered from the context stack. Defined the block for them.
-
- If this is the outermost LBRAC...RBRAC pair, there is no
- need to do anything; leave the symbols that preceded it
- to be attached to the function's own block. However, if
- it is so, we need to indicate that we just moved outside
- of the function. */
- if (local_symbols
- && context_stack_depth > !VARIABLES_INSIDE_BLOCK(desc))
- {
- /* Muzzle a compiler bug that makes end < start. */
- if (new->start_addr > value)
- new->start_addr = value;
- /* Make a block for the local symbols within. */
- finish_block (0, &local_symbols, new->old_blocks,
- new->start_addr + last_source_start_addr,
- value + last_source_start_addr);
- }
- else
- {
- within_function = 0;
- }
- if (VARIABLES_INSIDE_BLOCK(desc))
- /* Now pop locals of block just finished. */
- local_symbols = new->locals;
- break;
-
- case N_FN | N_EXT:
- /* This kind of symbol supposedly indicates the start
- of an object file. In fact this type does not appear. */
- break;
-
- case N_SO:
- /* This type of symbol indicates the start of data
- for one source file.
- Finish the symbol table of the previous source file
- (if any) and start accumulating a new symbol table. */
-#ifdef PCC_SOL_BROKEN
- /* pcc bug, occasionally puts out SO for SOL. */
- if (context_stack_depth > 0)
- {
- start_subfile (name);
- break;
- }
-#endif
- if (last_source_file)
- end_symtab (value);
- start_symtab (name, value);
- break;
-
- case N_SOL:
- /* This type of symbol indicates the start of data for
- a sub-source-file, one whose contents were copied or
- included in the compilation of the main source file
- (whose name was given in the N_SO symbol.) */
- start_subfile (name);
- break;
-
-#ifdef N_BINCL
- case N_BINCL:
- push_subfile ();
- add_new_header_file (name, value);
- start_subfile (name);
- break;
-
- case N_EINCL:
- start_subfile (pop_subfile ());
- break;
-
- case N_EXCL:
- add_old_header_file (name, value);
- break;
-#endif /* have N_BINCL */
-
- case N_SLINE:
- /* This type of "symbol" really just records
- one line-number -- core-address correspondence.
- Enter it in the line list for this symbol table. */
- record_line (desc, value);
- break;
-
- case N_BCOMM:
- if (common_block)
- error ("Invalid symbol data: common within common at symtab pos %d",
- symnum);
- common_block = local_symbols;
- common_block_i = local_symbols ? local_symbols->nsyms : 0;
- break;
-
- case N_ECOMM:
- /* Symbols declared since the BCOMM are to have the common block
- start address added in when we know it. common_block points to
- the first symbol after the BCOMM in the local_symbols list;
- copy the list and hang it off the symbol for the common block name
- for later fixup. */
- {
- int i;
- struct pending *link = local_symbols;
- struct symbol *sym =
- (struct symbol *) xmalloc (sizeof (struct symbol));
- bzero (sym, sizeof *sym);
- SYMBOL_NAME (sym) = savestring (name, strlen (name));
- SYMBOL_CLASS (sym) = LOC_BLOCK;
- SYMBOL_NAMESPACE (sym) = (enum namespace)((long)
- copy_pending (local_symbols, common_block_i, common_block));
- i = hashname (SYMBOL_NAME (sym));
- SYMBOL_VALUE (sym) = (int) global_sym_chain[i];
- global_sym_chain[i] = sym;
- common_block = 0;
- break;
- }
-
- case N_ECOML:
- case N_LENG:
- break;
-
- default:
- if (name)
- define_symbol (value, name, desc);
- }
-}
-
-/* This function was added for C++ functionality. I presume that it
- condenses the bunches formed by reading in an additional .o file
- (incremental linking). */
-
-static void
-condense_addl_misc_bunches ()
-{
- register int i, j;
- register struct misc_bunch *bunch;
-#ifdef NAMES_HAVE_UNDERSCORE
- int offset = 1;
-#else
- int offset = 0;
-#endif
-
- misc_function_vector
- = (struct misc_function *) xrealloc (misc_function_vector,
- (misc_count + misc_function_count) * sizeof (struct misc_function));
-
- j = misc_function_count;
- bunch = misc_bunch;
- while (bunch)
- {
- for (i = 0; i < misc_bunch_index; i++)
- {
- misc_function_vector[j] = bunch->contents[i];
- misc_function_vector[j].name
- = concat (misc_function_vector[j].name
- + (misc_function_vector[j].name[0] == '_' ? offset : 0),
- "", "");
- j++;
- }
- bunch = bunch->next;
- misc_bunch_index = MISC_BUNCH_SIZE;
- }
-
- misc_function_count += misc_count;
-
- /* Sort the misc functions by address. */
-
- qsort (misc_function_vector, misc_function_count,
- sizeof (struct misc_function), compare_misc_functions);
-}
-
-
-/* Read in another .o file and create a symtab entry for it.*/
-
-static void
-read_addl_syms (desc, stringtab, nlistlen, text_addr, text_size)
- int desc;
- register char *stringtab;
- register int nlistlen;
- unsigned text_addr;
- int text_size;
-{
- FILE *stream = fdopen (desc, "r");
- register char *namestring;
- register struct symbol *sym, *prev;
- int hash;
-
-#ifdef N_BINCL
- subfile_stack = 0;
-#endif
-
- last_source_file = 0;
- bzero (global_sym_chain, sizeof global_sym_chain);
- symtab_input_desc = desc;
- stringtab_global = stringtab;
- fill_symbuf ();
-
- for (symnum = 0; symnum < nlistlen; symnum++)
- {
- struct nlist *bufp;
- unsigned char type;
-
- QUIT; /* allow this to be interruptable */
- if (symbuf_idx == symbuf_end)
- fill_symbuf ();
- bufp = &symbuf[symbuf_idx++];
- type = bufp->n_type & N_TYPE;
- namestring = bufp->n_un.n_strx + stringtab;
-
- if( (type == N_TEXT) || (type == N_DATA) || (type == N_BSS) )
- {
- /* Relocate this file's symbol table information
- to the address it has been loaded into. */
- bufp->n_value += text_addr;
- }
-
- type = bufp->n_type;
-
- if (type & N_STAB)
- process_one_symbol (type, bufp->n_desc,
- bufp->n_value, namestring);
- /* A static text symbol whose name ends in ".o"
- can only mean the start of another object file.
- So end the symtab of the source file we have been processing.
- This is how we avoid counting the libraries as part
- or the last source file.
- Also this way we find end of first object file (crt0). */
- else if ((type == N_TEXT
-#ifdef N_NBTEXT
- || type == N_NBTEXT
-#endif
- )
- && (!strcmp (namestring + strlen (namestring) - 2, ".o"))
- || ! strncmp (namestring, "-l", 2))
- {
- if (last_source_file)
- end_symtab (bufp->n_value);
- }
- else if (type & N_EXT || type == N_TEXT
-#ifdef N_NBTEXT
- || type == N_NBTEXT
-#endif
- )
- {
- int used_up = 0;
-
- /* Record the location of _etext. */
- if (type == (N_TEXT | N_EXT)
- && !strcmp (namestring, "_etext"))
- end_of_text_addr = bufp->n_value;
-
-#if 0
- /* 25 Sep 89: The following seems to be stolen from
- read_ofile_symtab, and is wrong here (i.e. there was no
- first pass for add-file symbols). */
- /* This shouldn't be necessary, as we now do all of this work
- in scan_global syms and all misc functions should have been
- recorded on the first pass. */
- /* Global symbol: see if we came across a dbx definition
- for a corresponding symbol. If so, store the value.
- Remove syms from the chain when their values are stored,
- but search the whole chain, as there may be several syms
- from different files with the same name. */
- if (type & N_EXT)
- {
- prev = 0;
-#ifdef NAMES_HAVE_UNDERSCORE
- hash = hashname (namestring + 1);
-#else /* not NAMES_HAVE_UNDERSCORE */
- hash = hashname (namestring);
-#endif /* not NAMES_HAVE_UNDERSCORE */
- for (sym = global_sym_chain[hash];
- sym;)
- {
- if (
-#ifdef NAMES_HAVE_UNDERSCORE
- *namestring == '_'
- && namestring[1] == SYMBOL_NAME (sym)[0]
- &&
- !strcmp (namestring + 2, SYMBOL_NAME (sym) + 1)
-#else /* NAMES_HAVE_UNDERSCORE */
- namestring[0] == SYMBOL_NAME (sym)[0]
- &&
- !strcmp (namestring + 1, SYMBOL_NAME (sym) + 1)
-#endif /* NAMES_HAVE_UNDERSCORE */
- )
- {
- if (prev)
- SYMBOL_VALUE (prev) = SYMBOL_VALUE (sym);
- else
- global_sym_chain[hash]
- = (struct symbol *) SYMBOL_VALUE (sym);
- if (SYMBOL_CLASS (sym) == LOC_BLOCK)
- fix_common_block (sym, bufp->n_value);
- else
- SYMBOL_VALUE (sym) = bufp->n_value;
- if (prev)
- sym = (struct symbol *) SYMBOL_VALUE (prev);
- else
- sym = global_sym_chain[hash];
-
- used_up = 1;
- }
- else
- {
- prev = sym;
- sym = (struct symbol *) SYMBOL_VALUE (sym);
- }
- }
- }
-
- /* Defined global or text symbol: record as a misc function
- if it didn't give its address to a debugger symbol above. */
- if (type <= (N_TYPE | N_EXT)
- && type != N_EXT
- && ! used_up)
- record_misc_function (namestring, bufp->n_value,
- bufp->n_type);
-#endif /* 0 */
- }
- }
-
- if (last_source_file)
- end_symtab (text_addr + text_size);
-
- fclose (stream);
-}
-
-/* C++:
- This function allows the addition of incrementally linked object files.
- Since this has a fair amount of code in common with symbol_file_command,
- it might be worthwhile to consolidate things, as was done with
- read_dbx_symtab and condense_misc_bunches. */
-
-void
-add_file_command (arg_string)
- char* arg_string;
-{
- register int desc;
- DECLARE_FILE_HEADERS;
- struct nlist *nlist;
- char *stringtab;
- long buffer;
- register int val;
- extern void close ();
- struct cleanup *old_chain;
- struct symtab *symseg;
- struct stat statbuf;
- char *name;
- unsigned text_addr;
-
- if (arg_string == 0)
- error ("add-file takes a file name and an address");
-
- arg_string = tilde_expand (arg_string);
- make_cleanup (free, arg_string);
-
- for( ; *arg_string == ' '; arg_string++ );
- name = arg_string;
- for( ; *arg_string && *arg_string != ' ' ; arg_string++ );
- *arg_string++ = (char) 0;
-
- if (name[0] == 0)
- error ("add-file takes a file name and an address");
-
- text_addr = parse_and_eval_address (arg_string);
-
- dont_repeat ();
-
- if (!query ("add symbol table from filename \"%s\" at text_addr = 0x%x\n",
- name, text_addr))
- error ("Not confirmed.");
-
- desc = open (name, O_RDONLY);
- if (desc < 0)
- perror_with_name (name);
-
- old_chain = make_cleanup (close, desc);
-
- READ_FILE_HEADERS (desc, name);
-
- if (NUMBER_OF_SYMBOLS == 0)
- {
- printf ("%s does not have a symbol-table.\n", name);
- fflush (stdout);
- return;
- }
-
- printf ("Reading symbol data from %s...", name);
- fflush (stdout);
-
- /* Now read the string table, all at once. */
- val = lseek (desc, STRING_TABLE_OFFSET, 0);
- if (val < 0)
- perror_with_name (name);
- if (stat (name, &statbuf) < 0)
- perror_with_name (name);
- READ_STRING_TABLE_SIZE (buffer);
- if (buffer >= 0 && buffer < statbuf.st_size)
- {
-#ifdef BROKEN_LARGE_ALLOCA
- stringtab = (char *) xmalloc (buffer);
- make_cleanup (free, stringtab);
-#else
- stringtab = (char *) alloca (buffer);
-#endif
- }
- else
- stringtab = NULL;
- if (stringtab == NULL)
- error ("ridiculous string table size: %d bytes", buffer);
-
- /* Usually READ_STRING_TABLE_SIZE will have shifted the file pointer.
- Occaisionally, it won't. */
- val = lseek (desc, STRING_TABLE_OFFSET, 0);
- if (val < 0)
- perror_with_name (name);
- val = myread (desc, stringtab, buffer);
- if (val < 0)
- perror_with_name (name);
-
- /* Symsegs are no longer supported by GDB. Setting symseg_chain to
- 0 is easier than finding all the symseg code and eliminating it. */
- symseg_chain = 0;
-
- /* Position to read the symbol table. Do not read it all at once. */
- val = lseek (desc, SYMBOL_TABLE_OFFSET, 0);
- if (val < 0)
- perror_with_name (name);
-
- init_misc_functions ();
- make_cleanup (discard_misc_bunches, 0);
- init_header_files ();
- make_cleanup (free_header_files, 0);
- free_pendings = 0;
- pending_blocks = 0;
- file_symbols = 0;
- global_symbols = 0;
- make_cleanup (really_free_pendings, 0);
-
- read_addl_syms (desc, stringtab, NUMBER_OF_SYMBOLS, text_addr,
- SIZE_OF_TEXT_SEGMENT);
-
-
- /* Sort symbols alphabetically within each block. */
-
- sort_syms ();
-
- /* Go over the misc functions and install them in vector. */
-
- condense_addl_misc_bunches (1);
-
- /* Don't allow char * to have a typename (else would get caddr_t.) */
-
- TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0;
-
- do_cleanups (old_chain);
-
- /* Free the symtabs made by read_symsegs, but not their contents,
- which have been copied into symtabs on symtab_list. */
- while (symseg_chain)
- {
- register struct symtab *s = symseg_chain->next;
- free (symseg_chain);
- symseg_chain = s;
- }
-
- printf ("done.\n");
- fflush (stdout);
-}
-
-/* Read a number by which a type is referred to in dbx data,
- or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
- Just a single number N is equivalent to (0,N).
- Return the two numbers by storing them in the vector TYPENUMS.
- TYPENUMS will then be used as an argument to dbx_lookup_type. */
-
-static void
-read_type_number (pp, typenums)
- register char **pp;
- register int *typenums;
-{
- if (**pp == '(')
- {
- (*pp)++;
- typenums[0] = read_number (pp, ',');
- typenums[1] = read_number (pp, ')');
- }
- else
- {
- typenums[0] = 0;
- typenums[1] = read_number (pp, 0);
- }
-}
-
-
-
-static struct symbol *
-define_symbol (value, string, desc)
- int value;
- char *string;
- int desc;
-{
- register struct symbol *sym
- = (struct symbol *) obstack_alloc (symbol_obstack, sizeof (struct symbol));
- char *p = (char *) index (string, ':');
- int deftype;
- register int i;
-
- /* Ignore syms with empty names. */
- if (string[0] == 0)
- return 0;
-
- /* Ignore old-style symbols from cc -go */
- if (p == 0)
- return 0;
-
- SYMBOL_NAME (sym)
- = (char *) obstack_alloc (symbol_obstack, ((p - string) + 1));
- /* Open-coded bcopy--saves function call time. */
- {
- register char *p1 = string;
- register char *p2 = SYMBOL_NAME (sym);
- while (p1 != p)
- *p2++ = *p1++;
- *p2++ = '\0';
- }
- p++;
- /* Determine the type of name being defined. */
- if ((*p >= '0' && *p <= '9') || *p == '(')
- deftype = 'l';
- else
- deftype = *p++;
-
- /* c is a special case, not followed by a type-number.
- SYMBOL:c=iVALUE for an integer constant symbol.
- SYMBOL:c=rVALUE for a floating constant symbol.
- SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
- e.g. "b:c=e6,0" for "const b = blob1"
- (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
- if (deftype == 'c')
- {
- if (*p++ != '=')
- error ("Invalid symbol data at symtab pos %d.", symnum);
- switch (*p++)
- {
- case 'r':
- {
- double d = atof (p);
- char *value;
-
- SYMBOL_TYPE (sym) = builtin_type_double;
- value = (char *) obstack_alloc (symbol_obstack, sizeof (double));
- bcopy (&d, value, sizeof (double));
- SYMBOL_VALUE_BYTES (sym) = value;
- SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
- }
- break;
- case 'i':
- {
- SYMBOL_TYPE (sym) = builtin_type_int;
- SYMBOL_VALUE (sym) = atoi (p);
- SYMBOL_CLASS (sym) = LOC_CONST;
- }
- break;
- case 'e':
- /* SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
- e.g. "b:c=e6,0" for "const b = blob1"
- (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
- {
- int typenums[2];
-
- read_type_number (&p, typenums);
- if (*p++ != ',')
- error ("Invalid symbol data: no comma in enum const symbol");
-
- SYMBOL_TYPE (sym) = *dbx_lookup_type (typenums);
- SYMBOL_VALUE (sym) = atoi (p);
- SYMBOL_CLASS (sym) = LOC_CONST;
- }
- break;
- default:
- error ("Invalid symbol data at symtab pos %d.", symnum);
- }
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &file_symbols);
- return sym;
- }
-
- /* Now usually comes a number that says which data type,
- and possibly more stuff to define the type
- (all of which is handled by read_type) */
-
- if (deftype == 'p' && *p == 'F')
- /* pF is a two-letter code that means a function parameter in Fortran.
- The type-number specifies the type of the return value.
- Translate it into a pointer-to-function type. */
- {
- p++;
- SYMBOL_TYPE (sym)
- = lookup_pointer_type (lookup_function_type (read_type (&p)));
- }
- else
- {
- struct type *type = read_type (&p);
-
- if ((deftype == 'F' || deftype == 'f')
- && TYPE_CODE (type) != TYPE_CODE_FUNC)
- SYMBOL_TYPE (sym) = lookup_function_type (type);
- else
- SYMBOL_TYPE (sym) = type;
- }
-
- switch (deftype)
- {
- case 'f':
- SYMBOL_CLASS (sym) = LOC_BLOCK;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &file_symbols);
- break;
-
- case 'F':
- SYMBOL_CLASS (sym) = LOC_BLOCK;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &global_symbols);
- break;
-
- case 'G':
- /* For a class G (global) symbol, it appears that the
- value is not correct. It is necessary to search for the
- corresponding linker definition to find the value.
- These definitions appear at the end of the namelist. */
- i = hashname (SYMBOL_NAME (sym));
- SYMBOL_VALUE (sym) = (int) global_sym_chain[i];
- global_sym_chain[i] = sym;
- SYMBOL_CLASS (sym) = LOC_STATIC;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &global_symbols);
- break;
-
- /* This case is faked by a conditional above,
- when there is no code letter in the dbx data.
- Dbx data never actually contains 'l'. */
- case 'l':
- SYMBOL_CLASS (sym) = LOC_LOCAL;
- SYMBOL_VALUE (sym) = value;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &local_symbols);
- break;
-
- case 'p':
- SYMBOL_CLASS (sym) = LOC_ARG;
- SYMBOL_VALUE (sym) = value;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &local_symbols);
-
- /* If it's compiled, if it says `short', believe it. */
- if (processing_gcc_compilation || BELIEVE_PCC_PROMOTION)
- break;
-
-#if defined(BELIEVE_PCC_PROMOTION_TYPE)
- /* This macro is defined on machines (e.g. sparc) where
- we should believe the type of a PCC 'short' argument,
- but shouldn't believe the address (the address is
- the address of the corresponding int). Note that
- this is only different from the BELIEVE_PCC_PROMOTION
- case on big-endian machines.
-
- My guess is that this correction, as opposed to changing
- the parameter to an 'int' (as done below, for PCC
- on most machines), is the right thing to do
- on all machines, but I don't want to risk breaking
- something that already works. On most PCC machines,
- the sparc problem doesn't come up because the calling
- function has to zero the top bytes (not knowing whether
- the called function wants an int or a short), so there
- is no practical difference between an int and a short
- (except perhaps what happens when the GDB user types
- "print short_arg = 0x10000;"). */
- if (SYMBOL_TYPE (sym) == builtin_type_char
- || SYMBOL_TYPE (sym) == builtin_type_unsigned_char)
- SYMBOL_VALUE (sym) += 3;
- if (SYMBOL_TYPE (sym) == builtin_type_short
- || SYMBOL_TYPE (sym) == builtin_type_unsigned_short)
- SYMBOL_VALUE (sym) += 2;
- break;
-
-#else /* no BELIEVE_PCC_PROMOTION_TYPE. */
-
- /* If PCC says a parameter is a short or a char,
- it is really an int. */
- if (SYMBOL_TYPE (sym) == builtin_type_char
- || SYMBOL_TYPE (sym) == builtin_type_short)
- SYMBOL_TYPE (sym) = builtin_type_int;
- else if (SYMBOL_TYPE (sym) == builtin_type_unsigned_char
- || SYMBOL_TYPE (sym) == builtin_type_unsigned_short)
- SYMBOL_TYPE (sym) = builtin_type_unsigned_int;
- break;
-
-#endif /* no BELIEVE_PCC_PROMOTION_TYPE. */
-
- case 'P':
- SYMBOL_CLASS (sym) = LOC_REGPARM;
- SYMBOL_VALUE (sym) = STAB_REG_TO_REGNUM (value);
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &local_symbols);
- break;
-
- case 'r':
- SYMBOL_CLASS (sym) = LOC_REGISTER;
- SYMBOL_VALUE (sym) = STAB_REG_TO_REGNUM (value);
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &local_symbols);
- break;
-
- case 'S':
- /* Static symbol at top level of file */
- SYMBOL_CLASS (sym) = LOC_STATIC;
- SYMBOL_VALUE (sym) = value;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &file_symbols);
- break;
-
- case 't':
- SYMBOL_CLASS (sym) = LOC_TYPEDEF;
- SYMBOL_VALUE (sym) = value;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0
- && (TYPE_FLAGS (SYMBOL_TYPE (sym)) & TYPE_FLAG_PERM) == 0)
- TYPE_NAME (SYMBOL_TYPE (sym)) =
- obsavestring (SYMBOL_NAME (sym),
- strlen (SYMBOL_NAME (sym)));
- /* C++ vagaries: we may have a type which is derived from
- a base type which did not have its name defined when the
- derived class was output. We fill in the derived class's
- base part member's name here in that case. */
- else if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT
- || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION)
- && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)))
- {
- int i;
- for (i = TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)); i > 0; i--)
- if (TYPE_FIELD_NAME (SYMBOL_TYPE (sym), i - 1) == 0)
- TYPE_FIELD_NAME (SYMBOL_TYPE (sym), i - 1) =
- TYPE_NAME (TYPE_BASECLASS (SYMBOL_TYPE (sym), i));
- }
-
- add_symbol_to_list (sym, &file_symbols);
- break;
-
- case 'T':
- SYMBOL_CLASS (sym) = LOC_TYPEDEF;
- SYMBOL_VALUE (sym) = value;
- SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE;
- if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0
- && (TYPE_FLAGS (SYMBOL_TYPE (sym)) & TYPE_FLAG_PERM) == 0)
- TYPE_NAME (SYMBOL_TYPE (sym))
- = obconcat ("",
- (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_ENUM
- ? "enum "
- : (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT
- ? "struct " : "union ")),
- SYMBOL_NAME (sym));
- add_symbol_to_list (sym, &file_symbols);
- break;
-
- case 'V':
- /* Static symbol of local scope */
- SYMBOL_CLASS (sym) = LOC_STATIC;
- SYMBOL_VALUE (sym) = value;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &local_symbols);
- break;
-
- case 'v':
- /* Reference parameter */
- SYMBOL_CLASS (sym) = LOC_REF_ARG;
- SYMBOL_VALUE (sym) = value;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &local_symbols);
- break;
-
- case 'X':
- /* This is used by Sun FORTRAN for "function result value".
- Sun claims ("dbx and dbxtool interfaces", 2nd ed)
- that Pascal uses it too, but when I tried it Pascal used
- "x:3" (local symbol) instead. */
- SYMBOL_CLASS (sym) = LOC_LOCAL;
- SYMBOL_VALUE (sym) = value;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &local_symbols);
- break;
-
- default:
- error ("Invalid symbol data: unknown symbol-type code `%c' at symtab pos %d.", deftype, symnum);
- }
- return sym;
-}
-
-/* What about types defined as forward references inside of a small lexical
- scope? */
-/* Add a type to the list of undefined types to be checked through
- once this file has been read in. */
-static void
-add_undefined_type (type)
- struct type *type;
-{
- if (undef_types_length == undef_types_allocated)
- {
- undef_types_allocated *= 2;
- undef_types = (struct type **)
- xrealloc (undef_types,
- undef_types_allocated * sizeof (struct type *));
- }
- undef_types[undef_types_length++] = type;
-}
-
-/* Add here something to go through each undefined type, see if it's
- still undefined, and do a full lookup if so. */
-static void
-cleanup_undefined_types ()
-{
- struct type **type, *ntype;
- struct symbol *sym;
-
- for (type = undef_types; type < undef_types + undef_types_length; type++)
- {
- struct type *ntype = 0;
- /* Reasonable test to see if it's been defined since. */
- if (TYPE_NFIELDS (*type) == 0)
- {
- struct pending *ppt;
- int i;
- /* Name of the type, without "struct" or "union" */
- char *typename = TYPE_NAME (*type);
-
- if (!strncmp (typename, "struct ", 7))
- typename += 7;
- if (!strncmp (typename, "union ", 6))
- typename += 6;
-
- for (ppt = file_symbols; ppt; ppt = ppt->next)
- for (i = 0; i < ppt->nsyms; i++)
- {
- struct symbol *sym = ppt->symbol[i];
-
- if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
- && SYMBOL_NAMESPACE (sym) == STRUCT_NAMESPACE
- && (TYPE_CODE (SYMBOL_TYPE (sym)) ==
- TYPE_CODE (*type))
- && !strcmp (SYMBOL_NAME (sym), typename))
- bcopy (SYMBOL_TYPE (sym), *type, sizeof (struct type));
- }
- }
- else
- /* It has been defined; don't mark it as a stub. */
- TYPE_FLAGS (*type) &= ~TYPE_FLAG_STUB;
- }
- undef_types_length = 0;
-}
-
-
-
-/* Read a dbx type reference or definition;
- return the type that is meant.
- This can be just a number, in which case it references
- a type already defined and placed in type_vector.
- Or the number can be followed by an =, in which case
- it means to define a new type according to the text that
- follows the =. */
-
-static
-struct type *
-read_type (pp)
- register char **pp;
-{
- register struct type *type = 0;
- register int n;
- struct type *type1;
- int typenums[2];
- int xtypenums[2];
- char *tmpc;
-
- /* Read type number if present. The type number may be omitted.
- for instance in a two-dimensional array declared with type
- "ar1;1;10;ar1;1;10;4". */
- if ((**pp >= '0' && **pp <= '9')
- || **pp == '(')
- {
- read_type_number (pp, typenums);
-
- /* Detect random reference to type not yet defined.
- Allocate a type object but leave it zeroed. */
- if (**pp != '=')
- return dbx_alloc_type (typenums);
-
- *pp += 2;
- }
- else
- {
- /* 'typenums=' not present, type is anonymous. Read and return
- the definition, but don't put it in the type vector. */
- typenums[0] = typenums[1] = -1;
- *pp += 1;
- }
-
- switch ((*pp)[-1])
- {
- case 'x':
- {
- enum type_code code;
-
- /* Used to index through file_symbols. */
- struct pending *ppt;
- int i;
-
- /* Name including "struct", etc. */
- char *type_name;
-
- /* Name without "struct", etc. */
- char *type_name_only;
-
- {
- char *prefix;
- char *from, *to;
-
- /* Set the type code according to the following letter. */
- switch ((*pp)[0])
- {
- case 's':
- code = TYPE_CODE_STRUCT;
- prefix = "struct ";
- break;
- case 'u':
- code = TYPE_CODE_UNION;
- prefix = "union ";
- break;
- case 'e':
- code = TYPE_CODE_ENUM;
- prefix = "enum ";
- break;
- default:
- error ("Bad type cross reference at symnum: %d.", symnum);
- }
-
- to = type_name = (char *)
- obstack_alloc (symbol_obstack,
- (strlen (prefix) +
- ((char *) index (*pp, ':') - (*pp)) + 1));
-
- /* Copy the prefix. */
- from = prefix;
- while (*to++ = *from++)
- ;
- to--;
-
- type_name_only = to;
-
- /* Copy the name. */
- from = *pp + 1;
- while ((*to++ = *from++) != ':')
- ;
- *--to = '\0';
-
- /* Set the pointer ahead of the name which we just read. */
- *pp = from;
-
-#if 0
- /* The following hack is clearly wrong, because it doesn't
- check whether we are in a baseclass. I tried to reproduce
- the case that it is trying to fix, but I couldn't get
- g++ to put out a cross reference to a basetype. Perhaps
- it doesn't do it anymore. */
- /* Note: for C++, the cross reference may be to a base type which
- has not yet been seen. In this case, we skip to the comma,
- which will mark the end of the base class name. (The ':'
- at the end of the base class name will be skipped as well.)
- But sometimes (ie. when the cross ref is the last thing on
- the line) there will be no ','. */
- from = (char *) index (*pp, ',');
- if (from)
- *pp = from;
-#endif /* 0 */
- }
-
- /* Now check to see whether the type has already been declared. */
- /* This is necessary at least in the case where the
- program says something like
- struct foo bar[5];
- The compiler puts out a cross-reference; we better find
- set the length of the structure correctly so we can
- set the length of the array. */
- for (ppt = file_symbols; ppt; ppt = ppt->next)
- for (i = 0; i < ppt->nsyms; i++)
- {
- struct symbol *sym = ppt->symbol[i];
-
- if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
- && SYMBOL_NAMESPACE (sym) == STRUCT_NAMESPACE
- && (TYPE_CODE (SYMBOL_TYPE (sym)) == code)
- && !strcmp (SYMBOL_NAME (sym), type_name_only))
- {
- obstack_free (symbol_obstack, type_name);
- type = SYMBOL_TYPE (sym);
- return type;
- }
- }
-
- /* Didn't find the type to which this refers, so we must
- be dealing with a forward reference. Allocate a type
- structure for it, and keep track of it so we can
- fill in the rest of the fields when we get the full
- type. */
- type = dbx_alloc_type (typenums);
- TYPE_CODE (type) = code;
- TYPE_NAME (type) = type_name;
-
- TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
-
- add_undefined_type (type);
- return type;
- }
-
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- case '8':
- case '9':
- case '(':
- (*pp)--;
- read_type_number (pp, xtypenums);
- type = *dbx_lookup_type (xtypenums);
- if (type == 0)
- type = builtin_type_void;
- if (typenums[0] != -1)
- *dbx_lookup_type (typenums) = type;
- break;
-
- case '*':
- type1 = read_type (pp);
- if (TYPE_POINTER_TYPE (type1))
- {
- type = TYPE_POINTER_TYPE (type1);
- if (typenums[0] != -1)
- *dbx_lookup_type (typenums) = type;
- }
- else
- {
- type = dbx_alloc_type (typenums);
- smash_to_pointer_type (type, type1);
- }
- break;
-
- case '@':
- {
- struct type *domain = read_type (pp);
- char c;
- struct type *memtype;
-
- if (*(*pp)++ != ',')
- error ("invalid member type data format, at symtab pos %d.",
- symnum);
-
- memtype = read_type (pp);
- type = dbx_alloc_type (typenums);
- smash_to_member_type (type, domain, memtype);
- }
- break;
-
- case '#':
- {
- struct type *domain = read_type (pp);
- char c;
- struct type *return_type;
- struct type **args;
-
- if (*(*pp)++ != ',')
- error ("invalid member type data format, at symtab pos %d.",
- symnum);
-
- return_type = read_type (pp);
- args = read_args (pp, ';');
- type = dbx_alloc_type (typenums);
- smash_to_method_type (type, domain, return_type, args);
- }
- break;
-
- case '&':
- type1 = read_type (pp);
- if (TYPE_REFERENCE_TYPE (type1))
- {
- type = TYPE_REFERENCE_TYPE (type1);
- if (typenums[0] != -1)
- *dbx_lookup_type (typenums) = type;
- }
- else
- {
- type = dbx_alloc_type (typenums);
- smash_to_reference_type (type, type1);
- }
- break;
-
- case 'f':
- type1 = read_type (pp);
- if (TYPE_FUNCTION_TYPE (type1))
- {
- type = TYPE_FUNCTION_TYPE (type1);
- if (typenums[0] != -1)
- *dbx_lookup_type (typenums) = type;
- }
- else
- {
- type = dbx_alloc_type (typenums);
- smash_to_function_type (type, type1);
- }
- break;
-
- case 'r':
- type = read_range_type (pp, typenums);
- if (typenums[0] != -1)
- *dbx_lookup_type (typenums) = type;
- break;
-
- case 'e':
- type = dbx_alloc_type (typenums);
- type = read_enum_type (pp, type);
- *dbx_lookup_type (typenums) = type;
- break;
-
- case 's':
- type = dbx_alloc_type (typenums);
- type = read_struct_type (pp, type);
- break;
-
- case 'u':
- type = dbx_alloc_type (typenums);
- type = read_struct_type (pp, type);
- TYPE_CODE (type) = TYPE_CODE_UNION;
- break;
-
- case 'a':
- if (*(*pp)++ != 'r')
- error ("Invalid symbol data: unrecognized type-code `a%c' %s %d.",
- (*pp)[-1], "at symtab position", symnum);
-
- type = dbx_alloc_type (typenums);
- type = read_array_type (pp, type);
- break;
-
- default:
- error ("Invalid symbol data: unrecognized type-code `%c' at symtab pos %d.",
- (*pp)[-1], symnum);
- }
-
- if (type == 0)
- abort ();
-
-#if 0
- /* If this is an overriding temporary alteration for a header file's
- contents, and this type number is unknown in the global definition,
- put this type into the global definition at this type number. */
- if (header_file_prev_index >= 0)
- {
- register struct type **tp
- = explicit_lookup_type (header_file_prev_index, typenums[1]);
- if (*tp == 0)
- *tp = type;
- }
-#endif
- return type;
-}
-
-/* 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 *
-read_struct_type (pp, type)
- char **pp;
- register struct type *type;
-{
- struct nextfield
- {
- struct nextfield *next;
- int visibility;
- struct field field;
- };
-
- struct next_fnfield
- {
- struct next_fnfield *next;
- int visibility;
- struct fn_field fn_field;
- };
-
- struct next_fnfieldlist
- {
- struct next_fnfieldlist *next;
- struct fn_fieldlist fn_fieldlist;
- };
-
- register struct nextfield *list = 0;
- struct nextfield *new;
- int totalsize;
- char *name;
- register char *p;
- int nfields = 0;
- register int n;
-
- register struct next_fnfieldlist *mainlist = 0;
- int nfn_fields = 0;
- int read_possible_virtual_info = 0;
-
- if (TYPE_MAIN_VARIANT (type) == 0)
- {
- TYPE_MAIN_VARIANT (type) = type;
- }
-
- TYPE_CODE (type) = TYPE_CODE_STRUCT;
-
- /* First comes the total size in bytes. */
-
- TYPE_LENGTH (type) = read_number (pp, 0);
-
- /* C++: Now, if the class is a derived class, then the next character
- will be a '!', followed by the number of base classes derived from.
- Each element in the list contains visibility information,
- the offset of this base class in the derived structure,
- and then the base type. */
- if (**pp == '!')
- {
- int i, n_baseclasses, offset;
- struct type **baseclass_vec;
- struct type *baseclass;
- int via_public;
-
- /* Nonzero if it is a virtual baseclass, i.e.,
-
- struct A{};
- struct B{};
- struct C : public B, public virtual A {};
-
- B is a baseclass of C; A is a virtual baseclass for C. This is a C++
- 2.0 language feature. */
- int via_virtual;
-
- *pp += 1;
-
- n_baseclasses = read_number (pp, ',');
- baseclass_vec = (struct type **)
- obstack_alloc (symbol_obstack,
- (n_baseclasses) * sizeof (struct type **)) - 1;
-
- for (i = 1; i <= n_baseclasses; i++)
- {
- if (**pp == '\\')
- *pp = next_symbol_text ();
-
- switch (*(*pp)++)
- {
- case '0':
- via_virtual = 0;
- break;
- case '1':
- via_virtual = 1;
- break;
- default:
- error ("Invalid symbol data: bad visibility format at symtab pos %d",
- symnum);
- }
-
- switch (*(*pp)++)
- {
- case '0':
- via_public = 0;
- break;
- case '2':
- via_public = 1;
- break;
- default:
- error ("Invalid symbol data: bad visibility format at symtab pos %d.",
- symnum);
- }
-
- /* Offset of the portion of the object corresponding to
- this baseclass. Always zero in the absence of
- multiple inheritance. */
- offset = read_number (pp, ',');
- baseclass = read_type (pp);
- *pp += 1; /* skip trailing ';' */
-
- if (offset != 0)
- {
- static int error_printed = 0;
-
- if (!error_printed)
- {
- fprintf (stderr,
-"\nWarning: GDB has limited understanding of multiple inheritance...");
- error_printed = 1;
- }
- offset = 0;
- }
-
- baseclass_vec[i] = lookup_basetype_type (baseclass, offset, via_virtual, via_public);
-
- /* Since lookup_basetype_type can copy the type,
- it might copy a stub type (complete with stub flag).
- If so, we need to add it to the list of undefined types
- to clean up later. Even if lookup_basetype_type
- didn't copy the type, adding it to the undefined list
- will not do any harm. */
- if (TYPE_FLAGS(baseclass_vec[i]) & TYPE_FLAG_STUB)
- add_undefined_type (baseclass_vec[i]);
-
- /* Make this baseclass visible for structure-printing purposes. */
- new = (struct nextfield *) alloca (sizeof (struct nextfield));
- new->next = list;
- list = new;
- list->field.type = baseclass_vec[i];
- list->field.name = TYPE_NAME (baseclass_vec[i]);
- list->field.bitpos = offset;
- list->field.bitsize = 0; /* this should be an unpacked field! */
- nfields++;
- }
- TYPE_N_BASECLASSES (type) = n_baseclasses;
- TYPE_BASECLASSES (type) = baseclass_vec;
- }
-
- /* Now come the fields, as NAME:?TYPENUM,BITPOS,BITSIZE; for each one.
- At the end, we see a semicolon instead of a field.
-
- In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
- a static field.
-
- The `?' is a placeholder for one of '+' (public visibility),
- '0' (protected visibility), and '-' (private visibility). */
-
- /* We better set p right now, in case there are no fields at all... */
- p = *pp;
-
- while (**pp != ';')
- {
- int visibility;
-
- /* Check for and handle cretinous dbx symbol name continuation! */
- if (**pp == '\\') *pp = next_symbol_text ();
-
- /* Get space to record the next field's data. */
- new = (struct nextfield *) alloca (sizeof (struct nextfield));
- new->next = list;
- list = new;
-
- /* Get the field name. */
- p = *pp;
- while (*p != ':') p++;
- list->field.name = obsavestring (*pp, p - *pp);
-
- /* C++: Check to see if we have hit the methods yet. */
- if (p[1] == ':')
- break;
-
- *pp = p + 1;
-
- /* This means we have a visibility for a field coming. */
- if (**pp == '/')
- {
- switch (*++*pp)
- {
- case '0':
- visibility = 0;
- *pp += 1;
- break;
-
- case '1':
- visibility = 1;
- *pp += 1;
- break;
-
- case '2':
- visibility = 2;
- *pp += 1;
- break;
- }
- }
- /* else normal dbx-style format. */
-
- list->field.type = read_type (pp);
- if (**pp == ':')
- {
- list->field.bitpos = (long)-1;
- p = ++(*pp);
- while (*p != ';') p++;
- list->field.bitsize = (long) savestring (*pp, p - *pp);
- *pp = p + 1;
- nfields++;
- continue;
- }
- else if (**pp != ',')
- error ("Invalid symbol data: bad structure-type format at symtab pos %d.",
- symnum);
- (*pp)++; /* Skip the comma. */
- list->field.bitpos = read_number (pp, ',');
- list->field.bitsize = read_number (pp, ';');
-
-#if 0
- /* This is wrong because this is identical to the symbols
- produced for GCC 0-size arrays. For example:
- typedef union {
- int num;
- char str[0];
- } foo;
- The code which dumped core in such circumstances should be
- fixed not to dump core. */
-
- /* g++ -g0 can put out bitpos & bitsize zero for a static
- field. This does not give us any way of getting its
- class, so we can't know its name. But we can just
- ignore the field so we don't dump core and other nasty
- stuff. */
- if (list->field.bitpos == 0
- && list->field.bitsize == 0)
- {
- /* Have we given the warning yet? */
- static int warning_given = 0;
-
- /* Only give the warning once, no matter how many class
- variables there are. */
- if (!warning_given)
- {
- warning_given = 1;
- fprintf_filtered (stderr, "\n\
-Warning: DBX-style class variable debugging information encountered.\n\
-You seem to have compiled your program with \
-\"g++ -g0\" instead of \"g++ -g\".\n\
-Therefore GDB will not know about your class variables.\n\
-");
- }
-
- /* Ignore this field. */
- list = list->next;
- }
- else
-#endif /* 0 */
- {
- /* Detect an unpacked field and mark it as such.
- dbx gives a bit size for all fields.
- Note that forward refs cannot be packed,
- and treat enums as if they had the width of ints. */
- if (TYPE_CODE (list->field.type) != TYPE_CODE_INT
- && TYPE_CODE (list->field.type) != TYPE_CODE_ENUM)
- list->field.bitsize = 0;
- if ((list->field.bitsize == 8 * TYPE_LENGTH (list->field.type)
- || (TYPE_CODE (list->field.type) == TYPE_CODE_ENUM
- && (list->field.bitsize
- == 8 * TYPE_LENGTH (builtin_type_int))
- )
- )
- &&
- list->field.bitpos % 8 == 0)
- list->field.bitsize = 0;
- nfields++;
- }
- }
-
- /* Now come the method fields, as NAME::methods
- where each method is of the form TYPENUM,ARGS,...:PHYSNAME;
- At the end, we see a semicolon instead of a field.
-
- For the case of overloaded operators, the format is
- OPERATOR::*.methods, where OPERATOR is the string "operator",
- `*' holds the place for an operator name (such as `+=')
- and `.' marks the end of the operator name. */
- if (p[1] == ':')
- {
- /* Now, read in the methods. To simplify matters, we
- "unread" the name that has been read, so that we can
- start from the top. */
-
- p = *pp;
-
- /* chill the list of fields: the last entry (at the head)
- is a partially constructed entry which we now scrub. */
- list = list->next;
-
- /* For each list of method lists... */
- do
- {
- int i;
- struct next_fnfield *sublist = 0;
- struct fn_field *fn_fields = 0;
- int length = 0;
- struct next_fnfieldlist *new_mainlist =
- (struct next_fnfieldlist *)alloca (sizeof (struct next_fnfieldlist));
-
- /* read in the name. */
- while (*p != ':') p++;
- if ((*pp)[0] == 'o' && (*pp)[1] == 'p' && (*pp)[2] == '$')
- {
- static char opname[32] = "operator ";
- char *o = opname + 9;
-
- /* Skip past '::'. */
- p += 2;
- while (*p != '.')
- *o++ = *p++;
- new_mainlist->fn_fieldlist.name = savestring (opname, o - opname);
- /* Skip past '.' */
- *pp = p + 1;
- }
- else
- {
- i = 0;
- new_mainlist->fn_fieldlist.name = savestring (*pp, p - *pp);
- /* Skip past '::'. */
- *pp = p + 2;
- }
-
- do
- {
- struct next_fnfield *new_sublist =
- (struct next_fnfield *)alloca (sizeof (struct next_fnfield));
-
- /* Check for and handle cretinous dbx symbol name continuation! */
- if (**pp == '\\') *pp = next_symbol_text ();
-
- new_sublist->fn_field.type = read_type (pp);
- if (**pp != ':')
- error ("invalid symtab info for method at symbol number %d.",
- symnum);
- *pp += 1;
- new_sublist->fn_field.args =
- TYPE_ARG_TYPES (new_sublist->fn_field.type);
- p = *pp;
- while (*p != ';') p++;
- new_sublist->fn_field.physname = savestring (*pp, p - *pp);
- *pp = p + 1;
- new_sublist->visibility = *(*pp)++ - '0';
- if (**pp == '\\') *pp = next_symbol_text ();
-
- switch (*(*pp)++)
- {
- case '*':
- /* virtual member function, followed by index. */
- new_sublist->fn_field.voffset = read_number (pp, ';') + 1;
- break;
- case '?':
- /* static member function. */
- new_sublist->fn_field.voffset = 1;
- break;
- default:
- /* **pp == '.'. */
- /* normal member function. */
- new_sublist->fn_field.voffset = 0;
- break;
- }
-
- new_sublist->next = sublist;
- sublist = new_sublist;
- length++;
- }
- while (**pp != ';');
-
- *pp += 1;
-
- new_mainlist->fn_fieldlist.fn_fields =
- (struct fn_field *) obstack_alloc (symbol_obstack,
- sizeof (struct fn_field) * length);
- TYPE_FN_PRIVATE_BITS (new_mainlist->fn_fieldlist) =
- (int *) obstack_alloc (symbol_obstack,
- sizeof (int) * (1 + (length >> 5)));
-
- TYPE_FN_PROTECTED_BITS (new_mainlist->fn_fieldlist) =
- (int *) obstack_alloc (symbol_obstack,
- sizeof (int) * (1 + (length >> 5)));
-
- for (i = length; sublist; sublist = sublist->next)
- {
- new_mainlist->fn_fieldlist.fn_fields[--i] = sublist->fn_field;
- if (sublist->visibility == 0)
- B_SET (new_mainlist->fn_fieldlist.private_fn_field_bits, i);
- else if (sublist->visibility == 1)
- B_SET (new_mainlist->fn_fieldlist.protected_fn_field_bits, i);
- }
-
- new_mainlist->fn_fieldlist.length = length;
- new_mainlist->next = mainlist;
- mainlist = new_mainlist;
- nfn_fields++;
- }
- while (**pp != ';');
- }
-
- *pp += 1;
-
- /* Now create the vector of fields, and record how big it is. */
-
- TYPE_NFIELDS (type) = nfields;
- TYPE_FIELDS (type) = (struct field *) obstack_alloc (symbol_obstack,
- sizeof (struct field) * nfields);
- TYPE_FIELD_PRIVATE_BITS (type) =
- (int *) obstack_alloc (symbol_obstack,
- sizeof (int) * (1 + (nfields >> 5)));
- TYPE_FIELD_PROTECTED_BITS (type) =
- (int *) obstack_alloc (symbol_obstack,
- sizeof (int) * (1 + (nfields >> 5)));
-
- TYPE_NFN_FIELDS (type) = nfn_fields;
- TYPE_NFN_FIELDS_TOTAL (type) = nfn_fields;
-
- {
- int i;
- for (i = 1; i <= TYPE_N_BASECLASSES (type); ++i)
- TYPE_NFN_FIELDS_TOTAL (type) +=
- TYPE_NFN_FIELDS_TOTAL (TYPE_BASECLASS (type, i));
- }
-
- TYPE_FN_FIELDLISTS (type) =
- (struct fn_fieldlist *) obstack_alloc (symbol_obstack,
- sizeof (struct fn_fieldlist) * nfn_fields);
-
- /* Copy the saved-up fields into the field vector. */
-
- for (n = nfields; list; list = list->next)
- {
- TYPE_FIELD (type, --n) = list->field;
- if (list->visibility == 0)
- SET_TYPE_FIELD_PRIVATE (type, n);
- else if (list->visibility == 1)
- SET_TYPE_FIELD_PROTECTED (type, n);
- }
-
- for (n = nfn_fields; mainlist; mainlist = mainlist->next)
- TYPE_FN_FIELDLISTS (type)[--n] = mainlist->fn_fieldlist;
-
- if (**pp == '~')
- {
- *pp += 1;
-
- if (**pp == '=')
- {
- TYPE_FLAGS (type)
- |= TYPE_FLAG_HAS_CONSTRUCTOR | TYPE_FLAG_HAS_DESTRUCTOR;
- *pp += 1;
- }
- else if (**pp == '+')
- {
- TYPE_FLAGS (type) |= TYPE_FLAG_HAS_CONSTRUCTOR;
- *pp += 1;
- }
- else if (**pp == '-')
- {
- TYPE_FLAGS (type) |= TYPE_FLAG_HAS_DESTRUCTOR;
- *pp += 1;
- }
-
- /* Read either a '%' or the final ';'. */
- if (*(*pp)++ == '%')
- {
- /* Now we must record the virtual function table pointer's
- field information. */
-
- struct type *t;
- int i;
-
- t = read_type (pp);
- p = (*pp)++;
- while (*p != ';') p++;
- TYPE_VPTR_BASETYPE (type) = t;
- if (type == t)
- {
- if (TYPE_FIELD_NAME (t, 0) == 0)
- TYPE_VPTR_FIELDNO (type) = i = 0;
- else for (i = TYPE_NFIELDS (t) - 1; i >= 0; --i)
- if (! strncmp (TYPE_FIELD_NAME (t, i), *pp,
- strlen (TYPE_FIELD_NAME (t, i))))
- {
- TYPE_VPTR_FIELDNO (type) = i;
- break;
- }
- if (i < 0)
- error ("virtual function table field not found");
- }
- else
- TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (TYPE_BASECLASS (type, 1));
- *pp = p + 1;
- }
- else
- {
- TYPE_VPTR_BASETYPE (type) = 0;
- TYPE_VPTR_FIELDNO (type) = -1;
- }
- }
- else
- {
- TYPE_VPTR_BASETYPE (type) = 0;
- TYPE_VPTR_FIELDNO (type) = -1;
- }
-
- return type;
-}
-
-/* Read a definition of an array type,
- and create and return a suitable type object.
- Also creates a range type which represents the bounds of that
- array. */
-static struct type *
-read_array_type (pp, type)
- register char **pp;
- register struct type *type;
-{
- struct type *index_type, *element_type, *range_type;
- int lower, upper;
- int adjustable = 0;
-
- /* Format of an array type:
- "ar<index type>;lower;upper;<array_contents_type>". Put code in
- to handle this.
-
- Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
- for these, produce a type like float[][]. */
-
- index_type = read_type (pp);
- if (*(*pp)++ != ';')
- error ("Invalid symbol data; improper format of array type decl.");
-
- if (!(**pp >= '0' && **pp <= '9'))
- {
- *pp += 1;
- adjustable = 1;
- }
- lower = read_number (pp, ';');
-
- if (!(**pp >= '0' && **pp <= '9'))
- {
- *pp += 1;
- adjustable = 1;
- }
- upper = read_number (pp, ';');
-
- element_type = read_type (pp);
-
- if (adjustable)
- {
- lower = 0;
- upper = -1;
- }
-
- {
- /* Create range type. */
- range_type = (struct type *) obstack_alloc (symbol_obstack,
- sizeof (struct type));
- TYPE_CODE (range_type) = TYPE_CODE_RANGE;
- TYPE_TARGET_TYPE (range_type) = index_type;
-
- /* This should never be needed. */
- TYPE_LENGTH (range_type) = sizeof (int);
-
- TYPE_NFIELDS (range_type) = 2;
- TYPE_FIELDS (range_type) =
- (struct field *) obstack_alloc (symbol_obstack,
- 2 * sizeof (struct field));
- TYPE_FIELD_BITPOS (range_type, 0) = lower;
- TYPE_FIELD_BITPOS (range_type, 1) = upper;
- }
-
- TYPE_CODE (type) = TYPE_CODE_ARRAY;
- TYPE_TARGET_TYPE (type) = element_type;
- TYPE_LENGTH (type) = (upper - lower + 1) * TYPE_LENGTH (element_type);
- TYPE_NFIELDS (type) = 1;
- TYPE_FIELDS (type) =
- (struct field *) obstack_alloc (symbol_obstack,
- sizeof (struct field));
- TYPE_FIELD_TYPE (type, 0) = range_type;
-
- 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. */
-
-static struct type *
-read_enum_type (pp, type)
- register char **pp;
- register struct type *type;
-{
- register char *p;
- char *name;
- register long n;
- register struct symbol *sym;
- int nsyms = 0;
- struct pending **symlist;
- struct pending *osyms, *syms;
- int o_nsyms;
-
- if (within_function)
- symlist = &local_symbols;
- else
- symlist = &file_symbols;
- osyms = *symlist;
- o_nsyms = osyms ? osyms->nsyms : 0;
-
- /* Read the value-names and their values.
- The input syntax is NAME:VALUE,NAME:VALUE, and so on.
- A semicolon or comman instead of a NAME means the end. */
- while (**pp && **pp != ';' && **pp != ',')
- {
- /* Check for and handle cretinous dbx symbol name continuation! */
- if (**pp == '\\') *pp = next_symbol_text ();
-
- p = *pp;
- while (*p != ':') p++;
- name = obsavestring (*pp, p - *pp);
- *pp = p + 1;
- n = read_number (pp, ',');
-
- sym = (struct symbol *) obstack_alloc (symbol_obstack, sizeof (struct symbol));
- bzero (sym, sizeof (struct symbol));
- SYMBOL_NAME (sym) = name;
- SYMBOL_CLASS (sym) = LOC_CONST;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- SYMBOL_VALUE (sym) = n;
- add_symbol_to_list (sym, symlist);
- nsyms++;
- }
-
- if (**pp == ';')
- (*pp)++; /* Skip the semicolon. */
-
- /* Now fill in the fields of the type-structure. */
-
- TYPE_LENGTH (type) = sizeof (int);
- TYPE_CODE (type) = TYPE_CODE_ENUM;
- TYPE_NFIELDS (type) = nsyms;
- TYPE_FIELDS (type) = (struct field *) obstack_alloc (symbol_obstack, 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++)
- {
- struct symbol *sym = syms->symbol[j];
- SYMBOL_TYPE (sym) = type;
- TYPE_FIELD_NAME (type, n) = SYMBOL_NAME (sym);
- TYPE_FIELD_VALUE (type, n) = 0;
- TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (sym);
- TYPE_FIELD_BITSIZE (type, n++) = 0;
- }
- if (syms == osyms)
- break;
- }
-
- return type;
-}
-
-#define MAX_OF_TYPE(t) ((1 << (sizeof (t) - 1)) - 1)
-#define MIN_OF_TYPE(t) (-(1 << (sizeof (t) - 1)))
-
-static struct type *
-read_range_type (pp, typenums)
- char **pp;
- int typenums[2];
-{
- char *errp = *pp;
- int rangenums[2];
- int n2, n3;
- int self_subrange;
- struct type *result_type;
-
- /* First comes a type we are a subrange of.
- In C it is usually 0, 1 or the type being defined. */
- read_type_number (pp, rangenums);
- self_subrange = (rangenums[0] == typenums[0] &&
- rangenums[1] == typenums[1]);
-
- /* A semicolon should now follow; skip it. */
- if (**pp == ';')
- (*pp)++;
-
- /* The remaining two operands are usually lower and upper bounds
- of the range. But in some special cases they mean something else. */
- n2 = read_number (pp, ';');
- n3 = read_number (pp, ';');
-
- /* A type defined as a subrange of itself, with bounds both 0, is void. */
- if (self_subrange && n2 == 0 && n3 == 0)
- return builtin_type_void;
-
- /* If n3 is zero and n2 is not, we want a floating type,
- and n2 is the width in bytes.
-
- Fortran programs appear to use this for complex types also,
- and they give no way to distinguish between double and single-complex!
- We don't have complex types, so we would lose on all fortran files!
- So return type `double' for all of those. It won't work right
- for the complex values, but at least it makes the file loadable. */
-
- if (n3 == 0 && n2 > 0)
- {
- if (n2 == sizeof (float))
- return builtin_type_float;
- return builtin_type_double;
- }
-
- /* If the upper bound is -1, it must really be an unsigned int. */
-
- else if (n2 == 0 && n3 == -1)
- {
- if (sizeof (int) == sizeof (long))
- return builtin_type_unsigned_int;
- else
- return builtin_type_unsigned_long;
- }
-
- /* Special case: char is defined (Who knows why) as a subrange of
- itself with range 0-127. */
- else if (self_subrange && n2 == 0 && n3 == 127)
- return builtin_type_char;
-
- /* Assumptions made here: Subrange of self is equivalent to subrange
- of int. */
- else if (n2 == 0
- && (self_subrange ||
- *dbx_lookup_type (rangenums) == builtin_type_int))
- {
- /* an unsigned type */
-#ifdef LONG_LONG
- if (n3 == - sizeof (long long))
- return builtin_type_unsigned_long_long;
-#endif
- if (n3 == (1 << (8 * sizeof (int))) - 1)
- return builtin_type_unsigned_int;
- if (n3 == (1 << (8 * sizeof (short))) - 1)
- return builtin_type_unsigned_short;
- if (n3 == (1 << (8 * sizeof (char))) - 1)
- return builtin_type_unsigned_char;
- }
-#ifdef LONG_LONG
- else if (n3 == 0 && n2 == -sizeof (long long))
- return builtin_type_long_long;
-#endif
- else if (n2 == -n3 -1)
- {
- /* a signed type */
- if (n3 == (1 << (8 * sizeof (int) - 1)) - 1)
- return builtin_type_int;
- if (n3 == (1 << (8 * sizeof (long) - 1)) - 1)
- return builtin_type_long;
- if (n3 == (1 << (8 * sizeof (short) - 1)) - 1)
- return builtin_type_short;
- if (n3 == (1 << (8 * sizeof (char) - 1)) - 1)
- return builtin_type_char;
- }
-
- /* We have a real range type on our hands. Allocate space and
- return a real pointer. */
-
- /* At this point I don't have the faintest idea how to deal with
- a self_subrange type; I'm going to assume that this is used
- as an idiom, and that all of them are special cases. So . . . */
- if (self_subrange)
- error ("Type defined as subrange of itself.");
-
- result_type = (struct type *) obstack_alloc (symbol_obstack,
- sizeof (struct type));
- bzero (result_type, sizeof (struct type));
-
- TYPE_TARGET_TYPE (result_type) = (self_subrange ?
- builtin_type_int :
- *dbx_lookup_type(rangenums));
-
- /* We have to figure out how many bytes it takes to hold this
- range type. I'm going to assume that anything that is pushing
- the bounds of a long was taken care of above. */
- if (n2 >= MIN_OF_TYPE(char) && n3 <= MAX_OF_TYPE(char))
- TYPE_LENGTH (result_type) = 1;
- else if (n2 >= MIN_OF_TYPE(short) && n3 <= MAX_OF_TYPE(short))
- TYPE_LENGTH (result_type) = sizeof (short);
- else if (n2 >= MIN_OF_TYPE(int) && n3 <= MAX_OF_TYPE(int))
- TYPE_LENGTH (result_type) = sizeof (int);
- else if (n2 >= MIN_OF_TYPE(long) && n3 <= MAX_OF_TYPE(long))
- TYPE_LENGTH (result_type) = sizeof (long);
- else
- error ("Ranged type doesn't fit within known sizes.");
-
- TYPE_LENGTH (result_type) = TYPE_LENGTH (TYPE_TARGET_TYPE (result_type));
- TYPE_CODE (result_type) = TYPE_CODE_RANGE;
- TYPE_NFIELDS (result_type) = 2;
- TYPE_FIELDS (result_type) =
- (struct field *) obstack_alloc (symbol_obstack,
- 2 * sizeof (struct field));
- bzero (TYPE_FIELDS (result_type), 2 * sizeof (struct field));
- TYPE_FIELD_BITPOS (result_type, 0) = n2;
- TYPE_FIELD_BITPOS (result_type, 1) = n3;
-
- return result_type;
-}
-
-/* Read a number from the string pointed to by *PP.
- The value of *PP is advanced over the number.
- If END is nonzero, the character that ends the
- number must match END, or an error happens;
- and that character is skipped if it does match.
- If END is zero, *PP is left pointing to that character. */
-
-static long
-read_number (pp, end)
- char **pp;
- int end;
-{
- register char *p = *pp;
- register long n = 0;
- register int c;
- int sign = 1;
-
- /* Handle an optional leading minus sign. */
-
- if (*p == '-')
- {
- sign = -1;
- p++;
- }
-
- /* Read the digits, as far as they go. */
-
- while ((c = *p++) >= '0' && c <= '9')
- {
- n *= 10;
- n += c - '0';
- }
- if (end)
- {
- if (c && c != end)
- error ("Invalid symbol data: invalid character \\%03o at symbol pos %d.", c, symnum);
- }
- else
- --p;
-
- *pp = p;
- return n * sign;
-}
-
-/* Read in an argument list. This is a list of types. It is terminated with
- a ':', FYI. Return the list of types read in. */
-static struct type **
-read_args (pp, end)
- char **pp;
- int end;
-{
- struct type *types[1024], **rval; /* allow for fns of 1023 parameters */
- int n = 0;
-
- while (**pp != end)
- {
- if (**pp != ',')
- error ("Invalid argument list: no ',', at symtab pos %d", symnum);
- *pp += 1;
-
- /* Check for and handle cretinous dbx symbol name continuation! */
- if (**pp == '\\')
- *pp = next_symbol_text ();
-
- types[n++] = read_type (pp);
- }
- *pp += 1; /* get past `end' (the ':' character) */
-
- if (n == 1)
- {
- rval = (struct type **) xmalloc (2 * sizeof (struct type *));
- }
- else if (TYPE_CODE (types[n-1]) != TYPE_CODE_VOID)
- {
- rval = (struct type **) xmalloc ((n + 1) * sizeof (struct type *));
- bzero (rval + n, sizeof (struct type *));
- }
- else
- {
- rval = (struct type **) xmalloc (n * sizeof (struct type *));
- }
- bcopy (types, rval, n * sizeof (struct type *));
- return rval;
-}
-
-/* This function is really horrible, but to avoid it, there would need
- to be more filling in of forward references. THIS SHOULD BE MOVED OUT
- OF COFFREAD.C AND DBXREAD.C TO SOME PLACE WHERE IT CAN BE SHARED */
-int
-fill_in_vptr_fieldno (type)
- struct type *type;
-{
- if (TYPE_VPTR_FIELDNO (type) < 0)
- TYPE_VPTR_FIELDNO (type) =
- fill_in_vptr_fieldno (TYPE_BASECLASS (type, 1));
- return TYPE_VPTR_FIELDNO (type);
-}
-
-/* Copy a pending list, used to record the contents of a common
- block for later fixup. */
-static struct pending *
-copy_pending (beg, begi, end)
- struct pending *beg, *end;
- int begi;
-{
- struct pending *new = 0;
- struct pending *next;
-
- for (next = beg; next != 0 && (next != end || begi < end->nsyms);
- next = next->next, begi = 0)
- {
- register int j;
- for (j = begi; j < next->nsyms; j++)
- add_symbol_to_list (next->symbol[j], &new);
- }
- return new;
-}
-
-/* Add a common block's start address to the offset of each symbol
- declared to be in it (by being between a BCOMM/ECOMM pair that uses
- the common block name). */
-
-static void
-fix_common_block (sym, value)
- struct symbol *sym;
- int value;
-{
- struct pending *next = (struct pending *) SYMBOL_NAMESPACE (sym);
- for ( ; next; next = next->next)
- {
- register int j;
- for (j = next->nsyms - 1; j >= 0; j--)
- SYMBOL_VALUE (next->symbol[j]) += value;
- }
-}
-
-void
-_initialize_dbxread ()
-{
- symfile = 0;
- header_files = (struct header_file *) 0;
- this_object_header_files = (int *) 0;
-
- undef_types_allocated = 20;
- undef_types_length = 0;
- undef_types = (struct type **) xmalloc (undef_types_allocated *
- sizeof (struct type *));
-
- add_com ("symbol-file", class_files, symbol_file_command,
- "Load symbol table (in dbx format) from executable file FILE.");
-
- add_com ("add-file", class_files, add_file_command,
- "Load the symbols from FILE, assuming its code is at TEXT_START.") ;
-}
-
-#endif /* READ_DBX_FORMAT */