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