diff options
| -rw-r--r-- | ChangeLog | 11 | ||||
| -rw-r--r-- | sysdeps/unix/x86_64/sysdep.S | 16 |
2 files changed, 21 insertions, 6 deletions
@@ -1,3 +1,14 @@ +2002-09-29 Roland McGrath <roland@redhat.com> + + * sysdeps/unix/sysv/linux/x86_64/sysdep.S [USE_TLS && HAVE___THREAD]: + Define errno in .tbss. + * sysdeps/unix/x86_64/sysdep.S [USE_TLS && HAVE___THREAD]: Use TLS + access for setting errno. + + * sysdeps/unix/x86_64/sysdep.S: Store 32 bits at errno, not 64 bits. + AFAICT, it was just blind luck that the word following errno in .bss + was just alignment padding and not some other variable to be clobbered. + 2002-09-29 Jakub Jelinek <jakub@redhat.com> * sysdeps/unix/sysv/linux/kernel-features.h diff --git a/sysdeps/unix/x86_64/sysdep.S b/sysdeps/unix/x86_64/sysdep.S index b26b1db..a54c151 100644 --- a/sysdeps/unix/x86_64/sysdep.S +++ b/sysdeps/unix/x86_64/sysdep.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2001 Free Software Foundation, Inc. +/* Copyright (C) 2001, 2002 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -21,6 +21,7 @@ #include <bits/errno.h> #include <bp-asm.h> #include <bp-sym.h> +#include <tls.h> .globl C_SYMBOL_NAME(errno) .globl syscall_error @@ -40,28 +41,31 @@ syscall_error: movq $EAGAIN, %rax /* Yes; translate it to EAGAIN. */ notb: #endif -#ifndef PIC +#if USE_TLS && HAVE___THREAD + movq C_SYMBOL_NAME(errno)@GOTTPOFF(%rip), %rcx + movl %eax, %fs:0(%rcx) +#elif !defined PIC # ifndef _LIBC_REENTRANT - movq %rax, C_SYMBOL_NAME(errno) + movl %eax, C_SYMBOL_NAME(errno) # else pushq %rax PUSH_ERRNO_LOCATION_RETURN call BP_SYM (__errno_location) POP_ERRNO_LOCATION_RETURN popq %rcx - movq %rcx, (%rax) + movl %ecx, (%rax) # endif #else # ifndef _LIBC_REENTRANT movq C_SYMBOL_NAME(errno)@GOTPCREL(%rip), %rcx - movq %rax, (%rcx) + movl %eax, (%rcx) # else pushq %rax PUSH_ERRNO_LOCATION_RETURN call C_SYMBOL_NAME (BP_SYM (__errno_location)@PLT) POP_ERRNO_LOCATION_RETURN popq %rcx - movq %rcx, (%rax) + movl %ecx, (%rax) # endif #endif movq $-1, %rax |