2002-09-30 Roland McGrath <roland@redhat.com>
authorroland <roland>
Mon, 30 Sep 2002 07:25:58 +0000 (07:25 +0000)
committerroland <roland>
Mon, 30 Sep 2002 07:25:58 +0000 (07:25 +0000)
* sysdeps/unix/sysv/linux/x86_64/sysdep.h
[USE_TLS && HAVE___THREAD] (SYSCALL_ERROR_HANDLER): Use TLS access.

sysdeps/unix/sysv/linux/x86_64/sysdep.h

index 53dbe81..5588b46 100644 (file)
 
 #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;                             \
 
 /* 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: