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/* Definitions for reading symbol files into GDB.
Copyright (C) 1990, 1991 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* This file requires that you first include "bfd.h". */
/* Structure for keeping track of object files.
One of these is allocated for each object file we access, e.g. the
exec_file, symbol_file, and any shared library object files. */
struct objfile {
/* All struct objfile's are chained together by their next pointers. */
struct objfile *next;
/* Each objfile points to a chain of struct symtabs derived from this
object file. They are chained by their objfile_chain pointers, and
each one points back to this struct objfile. */
struct symtab *symtabs;
/* Ditto for psymtabs. */
struct partial_symtab *psymtabs;
/* The object file's name. Malloc'd; free it if you free this struct. */
char *name;
/* The object file's BFD. Can be null, in which case bfd_open (name) and
put the result here. */
bfd *obfd;
/* The modification timestamp of the object file, as of the last time
we read its symbols. */
long mtime;
};
/* Structure to keep track of symbol reading functions for various
object file types. */
struct sym_fns {
/* sym_name
is the name, or name prefix, of the BFD "target type" that this
set of functions handles. E.g. "a.out" or "sunOs" or "coff" or "elf". */
char *sym_name;
/* sym_namelen
counts how many bytes of sym_name should be checked against the
BFD target type of the file being read. If an exact match is
desired, specify the number of characters in sym_name plus 1 for the
NUL. If a prefix match is desired, specify the number of characters in
sym_name. */
int sym_namelen;
/* sym_new_init
initializes anything that is global to the entire
symbol table. It is called during symbol_file_add, when
we begin debugging an entirely new program. */
void (*sym_new_init) ();
/* sym_init (sf)
reads any initial information from a symbol file, and
initializes the struct sym_fns SF in preparation for sym_read().
It is called every time we read a symbol file for any reason. */
void (*sym_init) ();
/* sym_read (sf, addr, mainline)
reads a symbol file into a psymtab (or possibly a symtab).
SF is the struct sym_fns that sym_init initialized. ADDR
is the offset between the file's specified start address and
its true address in memory. MAINLINE is 1 if this is the
main symbol table being read, and 0 if a secondary
symbol file (e.g. shared library or dynamically loaded file)
is being read. */
void (*sym_read) ();
/* sym_bfd
is the accessor for the symbol file being read. */
bfd *sym_bfd;
/* sym_private
is where information can be shared among sym_init and sym_read.
It is typically a pointer to malloc'd memory. */
char *sym_private; /* Should be void * */
/* next
finds the next struct sym_fns. They are allocated and initialized
in whatever module implements the functions pointed to; an
initializer calls add_symtab_fns to add them to the global chain. */
struct sym_fns *next;
/* objfile
is the "struct objfile" for the object file being read. */
struct objfile *objfile;
};
extern void extend_psymbol_list();
/* Add any kind of symbol to a psymbol_allocation_list. */
#define ADD_PSYMBOL_VT_TO_LIST(NAME, NAMELENGTH, NAMESPACE, CLASS, LIST, VALUE, VT)\
do { \
register struct partial_symbol *psym; \
if ((LIST).next >= (LIST).list + (LIST).size) \
extend_psymbol_list(&(LIST)); \
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); \
VT (psym) = (VALUE); \
} while (0);
/* Functions */
extern struct symtab *allocate_symtab ();
extern struct objfile *allocate_objfile ();
extern void free_objfile ();
extern int free_named_symtabs ();
extern void fill_in_vptr_fieldno ();
extern void add_symtab_fns ();
extern void syms_from_objfile ();
/* Functions for dealing with the misc "function" vector, really a misc
address<->symbol mapping vector for things we don't have debug symbols
for. */
extern void init_misc_bunches ();
extern void prim_record_misc_function ();
extern void discard_misc_bunches ();
extern void condense_misc_bunches ();
/* Sorting your symbols for fast lookup or alphabetical printing. */
extern void sort_block_syms ();
extern void sort_symtab_syms ();
extern void sort_all_symtab_syms ();
extern void sort_block_syms ();
/* 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. */
extern char *obsavestring ();
/* Concatenate strings S1, S2 and S3; return the new string.
Space is found in the symbol_obstack. */
extern char *obconcat ();
/* Variables */
/* The object file that the main symbol table was loaded from (e.g. the
argument to the "symbol-file" or "file" command). */
extern struct objfile *symfile_objfile;
/* Where execution starts in symfile */
CORE_ADDR entry_point;
/* Root of object file struct chain. */
struct objfile *object_files;
/* Vectors of all partial symbols read in from file. */
extern struct psymbol_allocation_list {
struct partial_symbol *list, *next;
int size;
} global_psymbols, static_psymbols;
/* Support for complaining about things in the symbol file that aren't
catastrophic.
Each such thing gets a counter. The first time we have the problem,
during a symbol read, we report it. At the end of symbol reading,
if verbose, we report how many of each problem we had. */
struct complaint {
char *message;
unsigned counter;
struct complaint *next;
};
/* Root of the chain of complaints that have at some point been issued.
This is used to reset the counters, and/or report the total counts. */
extern struct complaint complaint_root[1];
/* Functions that handle complaints. (in symfile.c) */
void complain();
void clear_complaints();
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