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/* 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 */
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