diff options
| author | Roland McGrath <roland@gnu.org> | 2002-09-30 07:26:12 +0000 |
|---|---|---|
| committer | Roland McGrath <roland@gnu.org> | 2002-09-30 07:26:12 +0000 |
| commit | 3efdff78b3ca58748dc709d3c6f6d32f7c6f0f05 (patch) | |
| tree | dcc70f30a66873b6e55db42a47bc36aa72e80953 /sysdeps/unix/sysv/linux/x86_64/sysdep.h | |
| parent | 78dfb643533f655f993d0cee177799921c5de19d (diff) | |
* sysdeps/unix/sysv/linux/x86_64/sysdep.h
[USE_TLS && HAVE___THREAD] (SYSCALL_ERROR_HANDLER): Use TLS access.
Diffstat (limited to 'sysdeps/unix/sysv/linux/x86_64/sysdep.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/x86_64/sysdep.h | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/sysdeps/unix/sysv/linux/x86_64/sysdep.h b/sysdeps/unix/sysv/linux/x86_64/sysdep.h index 53dbe8143f..5588b4606e 100644 --- a/sysdeps/unix/sysv/linux/x86_64/sysdep.h +++ b/sysdeps/unix/sysv/linux/x86_64/sysdep.h @@ -78,10 +78,16 @@ #ifndef PIC #define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */ -#else -/* Store (- %rax) into errno through the GOT. Note that errno occupies 4 bytes. */ -#ifdef _LIBC_REENTRANT -#define SYSCALL_ERROR_HANDLER \ +#elif USE_TLS && HAVE___THREAD +# define SYSCALL_ERROR_HANDLER \ + movq errno@GOTTPOFF(%rip), %rcx; \ + xorq %rdx, %rdx; \ + subq %rax, %rdx; \ + movl %eax, %fs:0(%rcx) +#elif defined _LIBC_REENTRANT +/* Store (- %rax) into errno through the GOT. + Note that errno occupies only 4 bytes. */ +# define SYSCALL_ERROR_HANDLER \ 0: \ xorq %rdx, %rdx; \ subq %rax, %rdx; \ @@ -96,15 +102,14 @@ /* A quick note: it is assumed that the call to `__errno_location' does not modify the stack! */ -#else -#define SYSCALL_ERROR_HANDLER \ +#else /* Not _LIBC_REENTRANT. */ +# define SYSCALL_ERROR_HANDLER \ 0:movq errno@GOTPCREL(%RIP), %rcx; \ xorq %rdx, %rdx; \ subq %rax, %rdx; \ movl %edx, (%rcx); \ orq $-1, %rax; \ jmp L(pseudo_end); -#endif /* _LIBC_REENTRANT */ #endif /* PIC */ /* Linux/x86-64 takes system call arguments in registers: |