mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-02 23:04:09 +08:00
130 lines
3.2 KiB
C
130 lines
3.2 KiB
C
/* gdb_symbols.c - Deal with symbols for GDB format
|
||
Copyright (C) 1987 Free Software Foundation, Inc.
|
||
|
||
This file is part of GAS, the GNU Assembler.
|
||
|
||
GAS 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.
|
||
|
||
GAS 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 GAS; see the file COPYING. If not, write to
|
||
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
|
||
|
||
/*
|
||
* During assembly, note requests to place symbol values in the GDB
|
||
* symbol file. When symbol values are known and the symbol file is
|
||
* in memory, place the symbol values in the memory image of the file.
|
||
*
|
||
* This has static data: it is not data_sharable.
|
||
*
|
||
* gdb_symbols_begin ()
|
||
* Call once before using this package.
|
||
*
|
||
* gdb_symbols_fixup (symbolP, offset_in_file)
|
||
* Remember to put the value of a symbol into the GDB file.
|
||
*
|
||
* gdb_symbols_emit ()
|
||
* Perform all the symbol fixups.
|
||
*
|
||
* uses:
|
||
* xmalloc()
|
||
* gdb_alter()
|
||
*/
|
||
|
||
#include "as.h"
|
||
#include "struc-symbol.h"
|
||
|
||
#define SYM_GROUP (100) /* We allocate storage in lumps this big. */
|
||
|
||
|
||
struct gdb_symbol /* 1 fixup request. */
|
||
{
|
||
symbolS * gs_symbol;
|
||
long int gs_offset; /* Where in GDB symbol file. */
|
||
};
|
||
typedef struct gdb_symbol gdb_symbolS;
|
||
|
||
struct symbol_fixup_group
|
||
{
|
||
struct symbol_fixup_group * sfg_next;
|
||
gdb_symbolS sfg_item [SYM_GROUP];
|
||
};
|
||
typedef struct symbol_fixup_group symbol_fixup_groupS;
|
||
|
||
static symbol_fixup_groupS * root;
|
||
static short int used; /* # of last slot used. */
|
||
/* Counts down from SYM_GROUP. */
|
||
|
||
static symbol_fixup_groupS * /* Make storage for some more reminders. */
|
||
new_sfg ()
|
||
{
|
||
symbol_fixup_groupS * newP;
|
||
char * xmalloc();
|
||
|
||
newP = (symbol_fixup_groupS *) xmalloc ((long)sizeof(symbol_fixup_groupS));
|
||
newP -> sfg_next = root;
|
||
used = SYM_GROUP;
|
||
root = newP;
|
||
return (newP);
|
||
}
|
||
|
||
|
||
void
|
||
gdb_symbols_begin ()
|
||
{
|
||
root = 0;
|
||
(void)new_sfg ();
|
||
}
|
||
|
||
|
||
void /* Build a reminder to put a symbol value */
|
||
gdb_symbols_fixup (sy, offset) /* into the GDB symbol file. */
|
||
symbolS * sy; /* Which symbol. */
|
||
long int offset; /* Where in GDB symbol file. */
|
||
{
|
||
register symbol_fixup_groupS * p;
|
||
register gdb_symbolS * q;
|
||
|
||
p = root;
|
||
know( used >= 0 );
|
||
if ( used == 0)
|
||
{
|
||
p = new_sfg ();
|
||
}
|
||
q = p -> sfg_item + -- used;
|
||
q -> gs_symbol = sy;
|
||
q -> gs_offset = offset;
|
||
}
|
||
|
||
void
|
||
gdb_symbols_emit () /* Append GDB symbols to object file. */
|
||
{
|
||
symbol_fixup_groupS * sfgP;
|
||
void gdb_alter();
|
||
|
||
for (sfgP = root; sfgP; sfgP = sfgP -> sfg_next)
|
||
{
|
||
register gdb_symbolS * gsP;
|
||
register gdb_symbolS * limit;
|
||
|
||
limit = sfgP -> sfg_item +
|
||
(sfgP -> sfg_next ? 0 : used);
|
||
for (gsP = sfgP -> sfg_item + SYM_GROUP - 1;
|
||
gsP >= limit;
|
||
gsP --)
|
||
{
|
||
gdb_alter (gsP -> gs_offset,
|
||
(long int) gsP -> gs_symbol -> sy_value);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* end: gdb_symbols.c */
|