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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-04-03 11:23:20 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2024-04-17 16:12:41 -0300 |
| commit | 0b0c655d880f0b541dd5cb3d08248a6832af7f6a (patch) | |
| tree | 9ea4572926e135e08506dcce46b9387aba1a9d20 | |
| parent | 5272f92fd5665b1cea37cda8d70cb888b9059c6e (diff) | |
| download | glibc-0b0c655d880f0b541dd5cb3d08248a6832af7f6a.tar.gz glibc-0b0c655d880f0b541dd5cb3d08248a6832af7f6a.tar.xz glibc-0b0c655d880f0b541dd5cb3d08248a6832af7f6a.zip | |
elf: Use volatile to set __rseq_size and __rseq_offset
To avoid compiler to optimize them away.
| -rw-r--r-- | sysdeps/nptl/dl-tls_init_tp.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sysdeps/nptl/dl-tls_init_tp.c b/sysdeps/nptl/dl-tls_init_tp.c index 092c274f36..4510c32404 100644 --- a/sysdeps/nptl/dl-tls_init_tp.c +++ b/sysdeps/nptl/dl-tls_init_tp.c @@ -107,7 +107,7 @@ __tls_init_tp (void) { /* We need a writable view of the variables. They are in .data.relro and are not yet write-protected. */ - extern unsigned int size __asm__ ("__rseq_size"); + extern volatile unsigned int size __asm__ ("__rseq_size"); size = sizeof (pd->rseq_area); } @@ -117,7 +117,7 @@ __tls_init_tp (void) all targets support __thread_pointer, so set __rseq_offset only if the rseq registration may have happened because RSEQ_SIG is defined. */ - extern ptrdiff_t offset __asm__ ("__rseq_offset"); + extern volatile ptrdiff_t offset __asm__ ("__rseq_offset"); offset = (char *) &pd->rseq_area - (char *) __thread_pointer (); #endif } |