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gas: always add dummy symbols when creating XCOFF sections.

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Most of the algorithms for XCOFF in tc-ppc.c assume that
the csects field of a ppc_xcoff_section isn't NULL.
This was already made for most of the sections with the creation
of a dummy symbol.
This patch simply mades it default when creating a xcoff_section.

gas/
	* config/tc-ppc.c (ppc_init_xcoff_section): Always create
	the dummy symbol.
	(md_begin): Adjust ppc_init_xcoff_section call.
	(ppc_comm): Likewise.
	(ppc_change_csect): Likewise.
This commit is contained in:
Clément Chigot
2021-07-30 13:56:54 +02:00
parent 47fcfcbadc
commit 934cb8492f
1 changed files with 11 additions and 17 deletions
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24
gas/config/tc-ppc.c
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@ -1014,19 +1014,16 @@ ppc_xcoff_section_is_initialized (struct ppc_xcoff_section *section)
/* Initialize a ppc_xcoff_section. /* Initialize a ppc_xcoff_section.
Dummy symbols are used to ensure the position of .text over .data Dummy symbols are used to ensure the position of .text over .data
and .tdata. These symbols won't be output. */ and .tdata. Moreover, they allow all algorithms here to be sure that
csects isn't NULL. These symbols won't be output. */
static void static void
ppc_init_xcoff_section (struct ppc_xcoff_section *s, segT seg, ppc_init_xcoff_section (struct ppc_xcoff_section *s, segT seg)
bool need_dummy)
{ {
s->segment = seg; s->segment = seg;
s->next_subsegment = 2; s->next_subsegment = 2;
if (need_dummy)
{
s->csects = symbol_make ("dummy\001"); s->csects = symbol_make ("dummy\001");
symbol_get_tc (s->csects)->within = s->csects; symbol_get_tc (s->csects)->within = s->csects;
} }
}
/* The current csect. */ /* The current csect. */
static symbolS *ppc_current_csect; static symbolS *ppc_current_csect;
@ -1881,9 +1878,9 @@ md_begin (void)
/* Create XCOFF sections with .text in first, as it's creating dummy symbols /* Create XCOFF sections with .text in first, as it's creating dummy symbols
to serve as initial csects. This forces the text csects to precede the to serve as initial csects. This forces the text csects to precede the
data csects. These symbols will not be output. */ data csects. These symbols will not be output. */
ppc_init_xcoff_section (&ppc_xcoff_text_section, text_section, true); ppc_init_xcoff_section (&ppc_xcoff_text_section, text_section);
ppc_init_xcoff_section (&ppc_xcoff_data_section, data_section, true); ppc_init_xcoff_section (&ppc_xcoff_data_section, data_section);
ppc_init_xcoff_section (&ppc_xcoff_bss_section, bss_section, true); ppc_init_xcoff_section (&ppc_xcoff_bss_section, bss_section);
#endif #endif
} }
@ -4400,8 +4397,7 @@ ppc_comm (int lcomm)
section = &ppc_xcoff_tbss_section; section = &ppc_xcoff_tbss_section;
if (!ppc_xcoff_section_is_initialized (section)) if (!ppc_xcoff_section_is_initialized (section))
{ {
ppc_init_xcoff_section (section, ppc_init_xcoff_section (section, subseg_new (".tbss", 0));
subseg_new (".tbss", 0), false);
bfd_set_section_flags (section->segment, bfd_set_section_flags (section->segment,
SEC_ALLOC | SEC_THREAD_LOCAL); SEC_ALLOC | SEC_THREAD_LOCAL);
seg_info (section->segment)->bss = 1; seg_info (section->segment)->bss = 1;
@ -4558,8 +4554,7 @@ ppc_change_csect (symbolS *sym, offsetT align)
/* Create .tdata section if not yet done. */ /* Create .tdata section if not yet done. */
if (!ppc_xcoff_section_is_initialized (section)) if (!ppc_xcoff_section_is_initialized (section))
{ {
ppc_init_xcoff_section (section, subseg_new (".tdata", 0), ppc_init_xcoff_section (section, subseg_new (".tdata", 0));
true);
bfd_set_section_flags (section->segment, SEC_ALLOC bfd_set_section_flags (section->segment, SEC_ALLOC
| SEC_LOAD | SEC_RELOC | SEC_DATA | SEC_LOAD | SEC_RELOC | SEC_DATA
| SEC_THREAD_LOCAL); | SEC_THREAD_LOCAL);
@ -4570,8 +4565,7 @@ ppc_change_csect (symbolS *sym, offsetT align)
/* Create .tbss section if not yet done. */ /* Create .tbss section if not yet done. */
if (!ppc_xcoff_section_is_initialized (section)) if (!ppc_xcoff_section_is_initialized (section))
{ {
ppc_init_xcoff_section (section, subseg_new (".tbss", 0), ppc_init_xcoff_section (section, subseg_new (".tbss", 0));
false);
bfd_set_section_flags (section->segment, SEC_ALLOC | bfd_set_section_flags (section->segment, SEC_ALLOC |
SEC_THREAD_LOCAL); SEC_THREAD_LOCAL);
seg_info (section->segment)->bss = 1; seg_info (section->segment)->bss = 1;