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Skip missing symbol version section check for executable 

Missing symbol version section is a run-time problem only if it will
be referenced dynamically at run-time.  We should skip the check for
locally defined symbol, which isn't referenced by shared library, when
linking executable.

bfd/

	PR ld/18718
	* elflink.c (elf_link_output_extsym): Check symbol version
	section check only if not linking executable, the symbol is
	referenced by shared library or not locally defined.

ld/testsuite/

	PR ld/18718
	* ld-elf/pr18718.c: New file.
	* ld-elf/shared.exp: Run tests for PR ld/18718.
This commit is contained in:
H.J. Lu 2015-07-25 07:56:18 -07:00
parent 4a11f20659
commit 1659f720b0
3 changed files with 77 additions and 2 deletions
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8
bfd/elflink.c
View File

@ -9217,8 +9217,12 @@ elf_link_output_extsym (struct bfd_hash_entry *bh, void *data)
/* Since there is no version information in the dynamic string,
if there is no version info in symbol version section, we will
have a run-time problem. */
if (h->verinfo.verdef == NULL)
have a run-time problem if not linking executable, referenced
by shared library, or not locally defined. */
if (h->verinfo.verdef == NULL
&& (!flinfo->info->executable
|| h->ref_dynamic
|| !h->def_regular))
{
char *p = strrchr (h->root.root.string, ELF_VER_CHR);

26
ld/testsuite/ld-elf/pr18718.c Normal file
View File

@ -0,0 +1,26 @@
#include <stdio.h>
#include <bfd_stdint.h>
extern void foo (void);
void
new_foo (void)
{
}
__asm__(".symver new_foo, foo@@VERS_2.0");
__attribute__ ((noinline, noclone))
int
bar (void)
{
return (intptr_t) &foo == 0x12345678 ? 1 : 0;
}
int
main(void)
{
bar ();
printf("PASS\n");
return 0;
}

45
ld/testsuite/ld-elf/shared.exp
View File

@ -529,5 +529,50 @@ if { [istarget *-*-linux*]
"pr2404.out" \
"-fPIE" \
] \
[list \
"Run pr18718" \
"" \
"" \
{ pr18718.c } \
"pr18718" \
"pass.out" \
"-I../bfd" \
] \
[list \
"Run pr18718 with PIE (1)" \
"-pie" \
"" \
{ pr18718.c } \
"pr18718pie1" \
"pass.out" \
"-fPIE -I../bfd" \
] \
[list \
"Run pr18718 with PIE (2)" \
"" \
"" \
{ pr18718.c } \
"pr18718pie2" \
"pass.out" \
"-fPIE -I../bfd" \
] \
[list \
"Run pr18718 with PIC (1)" \
"" \
"" \
{ pr18718.c } \
"pr18718pic1" \
"pass.out" \
"-fPIC -I../bfd" \
] \
[list \
"Run pr18718 with PIC (2)" \
"-pie" \
"" \
{ pr18718.c } \
"pr18718pic2" \
"pass.out" \
"-fPIC -I../bfd" \
] \
]
}