130 lines
3.2 KiB
C
130 lines
3.2 KiB
C
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/* gdb_symbols.c - Deal with symbols for GDB format
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Copyright (C) 1987 Free Software Foundation, Inc.
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This file is part of GAS, the GNU Assembler.
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GAS 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 1, or (at your option)
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any later version.
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GAS 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 GAS; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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/*
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* During assembly, note requests to place symbol values in the GDB
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* symbol file. When symbol values are known and the symbol file is
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* in memory, place the symbol values in the memory image of the file.
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*
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* This has static data: it is not data_sharable.
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*
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* gdb_symbols_begin ()
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* Call once before using this package.
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*
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* gdb_symbols_fixup (symbolP, offset_in_file)
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* Remember to put the value of a symbol into the GDB file.
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*
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* gdb_symbols_emit ()
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* Perform all the symbol fixups.
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*
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* uses:
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* xmalloc()
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* gdb_alter()
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*/
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#include "as.h"
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#include "struc-symbol.h"
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#define SYM_GROUP (100) /* We allocate storage in lumps this big. */
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struct gdb_symbol /* 1 fixup request. */
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{
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symbolS * gs_symbol;
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long int gs_offset; /* Where in GDB symbol file. */
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};
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typedef struct gdb_symbol gdb_symbolS;
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struct symbol_fixup_group
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{
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struct symbol_fixup_group * sfg_next;
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gdb_symbolS sfg_item [SYM_GROUP];
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};
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typedef struct symbol_fixup_group symbol_fixup_groupS;
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static symbol_fixup_groupS * root;
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static short int used; /* # of last slot used. */
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/* Counts down from SYM_GROUP. */
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static symbol_fixup_groupS * /* Make storage for some more reminders. */
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new_sfg ()
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{
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symbol_fixup_groupS * newP;
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char * xmalloc();
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newP = (symbol_fixup_groupS *) xmalloc ((long)sizeof(symbol_fixup_groupS));
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newP -> sfg_next = root;
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used = SYM_GROUP;
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root = newP;
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return (newP);
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}
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void
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gdb_symbols_begin ()
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{
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root = 0;
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(void)new_sfg ();
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}
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void /* Build a reminder to put a symbol value */
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gdb_symbols_fixup (sy, offset) /* into the GDB symbol file. */
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symbolS * sy; /* Which symbol. */
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long int offset; /* Where in GDB symbol file. */
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{
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register symbol_fixup_groupS * p;
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register gdb_symbolS * q;
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p = root;
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know( used >= 0 );
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if ( used == 0)
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{
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p = new_sfg ();
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}
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q = p -> sfg_item + -- used;
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q -> gs_symbol = sy;
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q -> gs_offset = offset;
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}
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void
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gdb_symbols_emit () /* Append GDB symbols to object file. */
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{
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symbol_fixup_groupS * sfgP;
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void gdb_alter();
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for (sfgP = root; sfgP; sfgP = sfgP -> sfg_next)
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{
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register gdb_symbolS * gsP;
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register gdb_symbolS * limit;
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limit = sfgP -> sfg_item +
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(sfgP -> sfg_next ? 0 : used);
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for (gsP = sfgP -> sfg_item + SYM_GROUP - 1;
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gsP >= limit;
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gsP --)
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{
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gdb_alter (gsP -> gs_offset,
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(long int) gsP -> gs_symbol -> sy_value);
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}
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}
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}
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/* end: gdb_symbols.c */
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