diff options
| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2025-10-31 17:00:47 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2025-11-10 08:58:10 -0300 |
| commit | e3394859eeee302edff09eb8ed0ec575aa8c5614 (patch) | |
| tree | 8e8ecc20aae6904c06db22b2edddb921daf6523a /sysdeps/x86_64 | |
| parent | 427c25278d1dae62dffa07ea5cd0fc33f07190af (diff) | |
x86: Fix THREAD_GSCOPE_RESET_FLAG build on clang
clang does not support __seg_fs in asm constraint.
Reviewed-by: Uros Bizjak <ubizjak@gmail.com>
Diffstat (limited to 'sysdeps/x86_64')
| -rw-r--r-- | sysdeps/x86_64/nptl/tls.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/sysdeps/x86_64/nptl/tls.h b/sysdeps/x86_64/nptl/tls.h index abfeb88054..9d53f05e65 100644 --- a/sysdeps/x86_64/nptl/tls.h +++ b/sysdeps/x86_64/nptl/tls.h @@ -198,10 +198,18 @@ _Static_assert (offsetof (tcbhead_t, __glibc_unused2) == 0x80, # define THREAD_GSCOPE_FLAG_UNUSED 0 # define THREAD_GSCOPE_FLAG_USED 1 # define THREAD_GSCOPE_FLAG_WAIT 2 + +/* clang does not support __seg_fs in asm constraint. */ +# ifdef __clang__ +# define FS_ASM "%%fs:" +# else +# define FS_ASM +# endif + # define THREAD_GSCOPE_RESET_FLAG() \ do \ { int __res; \ - asm volatile ("xchgl %1, %0" \ + asm volatile ("xchgl " FS_ASM "%1, %0" \ : "=r" (__res) \ : "m" (((struct pthread __seg_fs *)0)->header.gscope_flag), \ "0" (THREAD_GSCOPE_FLAG_UNUSED)); \ |