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authorRoland McGrath <roland@gnu.org>2002-09-30 07:26:12 +0000
committerRoland McGrath <roland@gnu.org>2002-09-30 07:26:12 +0000
commit3efdff78b3ca58748dc709d3c6f6d32f7c6f0f05 (patch)
treedcc70f30a66873b6e55db42a47bc36aa72e80953 /sysdeps
parent78dfb643533f655f993d0cee177799921c5de19d (diff)
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* sysdeps/unix/sysv/linux/x86_64/sysdep.h
[USE_TLS && HAVE___THREAD] (SYSCALL_ERROR_HANDLER): Use TLS access.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/unix/sysv/linux/x86_64/sysdep.h19
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: