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provide a hook to allow checking errors just before we output the file.

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gas:

	* write.c (write_object_file): Add md_pre_output_hook.
	* config/obj-macho.c (obj_mach_o_check_before_writing): New.
	(obj_mach_o_pre_output_hook): New.
	* config/obj-macho.h (md_pre_output_hook): Define.
	(obj_mach_o_pre_output_hook): Declare.
This commit is contained in:
Iain Sandoe 2012-02-21 13:39:37 +00:00
parent 025682772a
commit 16a8742098
4 changed files with 81 additions and 0 deletions
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8
gas/ChangeLog
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@ -1,3 +1,11 @@
2012-02-21 Iain Sandoe <idsandoe@googlemail.com>
* write.c (write_object_file): Add md_pre_output_hook.
* config/obj-macho.c (obj_mach_o_check_before_writing): New.
(obj_mach_o_pre_output_hook): New.
* config/obj-macho.h (md_pre_output_hook): Define.
(obj_mach_o_pre_output_hook): Declare.
2012-02-21 Tristan Gingold <gingold@adacore.com>
* config/tc-i386.h (OBJ_MACH_O): New section.

66
gas/config/obj-macho.c
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@ -1554,6 +1554,72 @@ obj_mach_o_process_stab (int what, const char *string,
/* It's a debug symbol. */
s->symbol.flags |= BSF_DEBUGGING;
/* We've set it - so check it, if you can, but don't try to create the
flags. */
s->symbol.udata.i = SYM_MACHO_FIELDS_NOT_VALIDATED;
}
/* This is a place to check for any errors that we can't detect until we know
what remains undefined at the end of assembly. */
static void
obj_mach_o_check_before_writing (bfd *abfd ATTRIBUTE_UNUSED,
asection *sec,
void *unused ATTRIBUTE_UNUSED)
{
fixS *fixP;
struct frchain *frchp;
segment_info_type *seginfo = seg_info (sec);
if (seginfo == NULL)
return;
/* We are not allowed subtractions where either of the operands is
undefined. So look through the frags for any fixes to check. */
for (frchp = seginfo->frchainP; frchp != NULL; frchp = frchp->frch_next)
for (fixP = frchp->fix_root; fixP != NULL; fixP = fixP->fx_next)
{
if (fixP->fx_addsy != NULL
&& fixP->fx_subsy != NULL
&& (! S_IS_DEFINED (fixP->fx_addsy)
|| ! S_IS_DEFINED (fixP->fx_subsy)))
{
segT add_symbol_segment = S_GET_SEGMENT (fixP->fx_addsy);
segT sub_symbol_segment = S_GET_SEGMENT (fixP->fx_subsy);
if (! S_IS_DEFINED (fixP->fx_addsy)
&& S_IS_DEFINED (fixP->fx_subsy))
{
as_bad_where (fixP->fx_file, fixP->fx_line,
_("`%s' can't be undefined in `%s' - `%s' {%s section}"),
S_GET_NAME (fixP->fx_addsy), S_GET_NAME (fixP->fx_addsy),
S_GET_NAME (fixP->fx_subsy), segment_name (sub_symbol_segment));
}
else if (! S_IS_DEFINED (fixP->fx_subsy)
&& S_IS_DEFINED (fixP->fx_addsy))
{
as_bad_where (fixP->fx_file, fixP->fx_line,
_("`%s' can't be undefined in `%s' {%s section} - `%s'"),
S_GET_NAME (fixP->fx_subsy), S_GET_NAME (fixP->fx_addsy),
segment_name (add_symbol_segment), S_GET_NAME (fixP->fx_subsy));
}
else
{
as_bad_where (fixP->fx_file, fixP->fx_line,
_("`%s' and `%s' can't be undefined in `%s' - `%s'"),
S_GET_NAME (fixP->fx_addsy), S_GET_NAME (fixP->fx_subsy),
S_GET_NAME (fixP->fx_addsy), S_GET_NAME (fixP->fx_subsy));
}
}
}
}
/* Do any checks that we can't complete without knowing what's undefined. */
void
obj_mach_o_pre_output_hook (void)
{
bfd_map_over_sections (stdoutput, obj_mach_o_check_before_writing, (char *) 0);
}
/* Here we count up frags in each subsection (where a sub-section is defined

3
gas/config/obj-macho.h
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@ -87,6 +87,9 @@ struct obj_mach_o_frag_data
#define OBJ_FRAG_TYPE struct obj_mach_o_frag_data
#define md_pre_output_hook obj_mach_o_pre_output_hook()
extern void obj_mach_o_pre_output_hook(void);
#define md_pre_relax_hook obj_mach_o_pre_relax_hook()
extern void obj_mach_o_pre_relax_hook (void);

4
gas/write.c
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@ -1767,6 +1767,10 @@ write_object_file (void)
fragS *fragP; /* Track along all frags. */
#endif
#ifdef md_pre_output_hook
md_pre_output_hook;
#endif
/* Do we really want to write it? */
{
int n_warns, n_errs;