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binutils-gdb
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XCOFF linker segmentation fault 

The XCOFF linker temporarily trims the output bfd section list,
without adjusting section_count to suit.  This is a little rude, but
the dwarf line number code can easily cope with this situation.  So
check for a NULL end of list as well as limiting the saved section
VMAs to the first section_count list entries.

Also fixes
-FAIL: Weak test 3 (main, static) (32-bit)
-FAIL: Weak test 3 (main, static) (64-bit)

	PR 24596
	* dwarf2.c (save_section_vma, section_vma_same): Check for NULL
	end of section list as well as section_count.
	* xcofflink.c (xcoff_link_add_symbols): Fix temporarily changed
	section list before returning error.
This commit is contained in:
Alan Modra 2019-05-27 15:38:55 +09:30
parent 58db964680
commit 0eb32b6e1d
3 changed files with 20 additions and 8 deletions
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8
bfd/ChangeLog
View File

@ -1,3 +1,11 @@
2019-05-28 Alan Modra <amodra@gmail.com>
PR 24596
* dwarf2.c (save_section_vma, section_vma_same): Check for NULL
end of section list as well as section_count.
* xcofflink.c (xcoff_link_add_symbols): Fix temporarily changed
section list before returning error.
2019-05-27 Alan Modra <amodra@gmail.com>
* elf.c (bfd_elf_set_group_contents): Exit on zero size section.

8
bfd/dwarf2.c
View File

@ -4272,7 +4272,9 @@ save_section_vma (const bfd *abfd, struct dwarf2_debug *stash)
if (stash->sec_vma == NULL)
return FALSE;
stash->sec_vma_count = abfd->section_count;
for (i = 0, s = abfd->sections; i < abfd->section_count; i++, s = s->next)
for (i = 0, s = abfd->sections;
s != NULL && i < abfd->section_count;
i++, s = s->next)
{
if (s->output_section != NULL)
stash->sec_vma[i] = s->output_section->vma + s->output_offset;
@ -4301,7 +4303,9 @@ section_vma_same (const bfd *abfd, const struct dwarf2_debug *stash)
if (abfd->section_count != stash->sec_vma_count)
return FALSE;
for (i = 0, s = abfd->sections; i < abfd->section_count; i++, s = s->next)
for (i = 0, s = abfd->sections;
s != NULL && i < abfd->section_count;
i++, s = s->next)
{
bfd_vma vma;

12
bfd/xcofflink.c
View File

@ -1882,7 +1882,7 @@ xcoff_link_add_symbols (bfd *abfd, struct bfd_link_info *info)
if (EXTERN_SYM_P (sym.n_sclass))
{
bfd_boolean copy;
bfd_boolean copy, ok;
flagword flags;
BFD_ASSERT (section != NULL);
@ -2022,12 +2022,12 @@ xcoff_link_add_symbols (bfd *abfd, struct bfd_link_info *info)
BFD_ASSERT (last_real->next == first_csect);
last_real->next = NULL;
flags = (sym.n_sclass == C_EXT ? BSF_GLOBAL : BSF_WEAK);
if (! (_bfd_generic_link_add_one_symbol
(info, abfd, name, flags, section, value,
NULL, copy, TRUE,
(struct bfd_link_hash_entry **) sym_hash)))
goto error_return;
ok = (_bfd_generic_link_add_one_symbol
(info, abfd, name, flags, section, value, NULL, copy, TRUE,
(struct bfd_link_hash_entry **) sym_hash));
last_real->next = first_csect;
if (!ok)
goto error_return;
if (smtyp == XTY_CM)
{