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binutils-gdb
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Add weak symbols as an extension to a.out. 

* read.c (pseudo_set): Only preserve external bit for OBJ_AOUT and
	OBJ_BOUT if not BFD_ASSEMBLER.
	* config/aout_gnu.h (N_WEAKU, N_WEAKA, N_WEAKT, N_WEAKD, N_WEAKB):
	Define as in ../include/aout/aout64.h.
	* config/obj-aout.h (OBJ_SYMFIELD_TYPE): If not BFD_ASSEMBLER,
	define as char.
	(S_GET_WEAK, S_SET_WEAK): Define if not BFD_ASSEMBLER.
	* config/obj-aout.c (obj_pseudo_table): Add "weak".
	(obj_emit_symbols): Adjust type of weak symbols.
	(obj_aout_weak): New static function.
This commit is contained in:
Ian Lance Taylor 1994-06-11 20:45:49 +00:00
parent 4298e311fe
commit 02d4e9238a
2 changed files with 61 additions and 0 deletions
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14
gas/ChangeLog
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@ -1,3 +1,17 @@
Sat Jun 11 16:41:21 1994 Ian Lance Taylor (ian@tweedledumb.cygnus.com)
Add weak symbols as an extension to a.out.
* read.c (pseudo_set): Only preserve external bit for OBJ_AOUT and
OBJ_BOUT if not BFD_ASSEMBLER.
* config/aout_gnu.h (N_WEAKU, N_WEAKA, N_WEAKT, N_WEAKD, N_WEAKB):
Define as in ../include/aout/aout64.h.
* config/obj-aout.h (OBJ_SYMFIELD_TYPE): If not BFD_ASSEMBLER,
define as char.
(S_GET_WEAK, S_SET_WEAK): Define if not BFD_ASSEMBLER.
* config/obj-aout.c (obj_pseudo_table): Add "weak".
(obj_emit_symbols): Adjust type of weak symbols.
(obj_aout_weak): New static function.
Fri Jun 10 13:48:49 1994 Ian Lance Taylor (ian@tweedledumb.cygnus.com)
* config/obj-elf.c (obj_elf_section): Don't set any flags based on

47
gas/config/obj-aout.c
View File

@ -62,12 +62,15 @@ const segT N_TYPE_seg[N_TYPE + 2] =
#endif
static void obj_aout_line PARAMS ((int));
static void obj_aout_weak PARAMS ((int));
const pseudo_typeS obj_pseudo_table[] =
{
{"line", obj_aout_line, 0}, /* source code line number */
{"ln", obj_aout_line, 0}, /* coff line number that we use anyway */
{"weak", obj_aout_weak, 0}, /* mark symbol as weak. */
/* coff debug pseudos (ignored) */
{"def", s_ignore, 0},
{"dim", s_ignore, 0},
@ -273,6 +276,20 @@ obj_emit_symbols (where, symbol_rootP)
if (!S_IS_DEBUG (symbolP) && !S_IS_DEFINED (symbolP))
S_SET_EXTERNAL (symbolP);
/* Adjust the type of a weak symbol. */
if (S_GET_WEAK (symbolP))
{
switch (S_GET_TYPE (symbolP))
{
case N_UNDF: S_SET_TYPE (symbolP, N_WEAKU); break;
case N_ABS: S_SET_TYPE (symbolP, N_WEAKA); break;
case N_TEXT: S_SET_TYPE (symbolP, N_WEAKT); break;
case N_DATA: S_SET_TYPE (symbolP, N_WEAKD); break;
case N_BSS: S_SET_TYPE (symbolP, N_WEAKB); break;
default: as_bad ("%s: bad type for weak symbol", temp); break;
}
}
obj_symbol_to_chars (where, symbolP);
S_SET_NAME (symbolP, temp);
}
@ -291,6 +308,36 @@ obj_aout_line (ignore)
demand_empty_rest_of_line ();
} /* obj_aout_line() */
/* Handle .weak. This is a GNU extension. */
static void
obj_aout_weak (ignore)
int ignore;
{
char *name;
int c;
symbolS *symbolP;
do
{
name = input_line_pointer;
c = get_symbol_end ();
symbolP = symbol_find_or_make (name);
*input_line_pointer = c;
SKIP_WHITESPACE ();
S_SET_WEAK (symbolP);
if (c == ',')
{
input_line_pointer++;
SKIP_WHITESPACE ();
if (*input_line_pointer == '\n')
c = '\n';
}
}
while (c == ',');
demand_empty_rest_of_line ();
}
void
obj_read_begin_hook ()
{