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| author | Roland McGrath <roland@gnu.org> | 2005-01-26 02:05:49 +0000 |
|---|---|---|
| committer | Roland McGrath <roland@gnu.org> | 2005-01-26 02:05:49 +0000 |
| commit | 70a8119bf0429692aa5ce181c79470ab2f3e3681 (patch) | |
| tree | 4989572441907b6734364639d4011566f18c49ed | |
| parent | 792dcd77cdafb46c746119e250a5ba9d20598f8f (diff) | |
| download | glibc-70a8119bf0429692aa5ce181c79470ab2f3e3681.tar.gz glibc-70a8119bf0429692aa5ce181c79470ab2f3e3681.tar.xz glibc-70a8119bf0429692aa5ce181c79470ab2f3e3681.zip | |
2005-01-23 Roland McGrath <roland@redhat.com>
* sysdeps/i386/Makefile (defines): If -mno-tls-direct-seg-refs appears in $(CFLAGS), add -DNO_TLS_DIRECT_SEG_REFS. * sysdeps/unix/sysv/linux/i386/sysdep.h [USE___THREAD] (SYSCALL_ERROR_HANDLER) [NO_TLS_DIRECT_SEG_REFS]: Load thread pointer from %gs:0 and add to that value, rather that direct %gs:OFFSET access. * sysdeps/unix/i386/sysdep.S [NO_TLS_DIRECT_SEG_REFS]: Likewise.
| -rw-r--r-- | sysdeps/i386/Makefile | 4 | ||||
| -rw-r--r-- | sysdeps/unix/i386/sysdep.S | 12 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/sysdep.h | 14 |
3 files changed, 26 insertions, 4 deletions
diff --git a/sysdeps/i386/Makefile b/sysdeps/i386/Makefile index 52faaa3109..ece94f3610 100644 --- a/sysdeps/i386/Makefile +++ b/sysdeps/i386/Makefile @@ -61,3 +61,7 @@ CFLAGS-dlopenold.c += -mpreferred-stack-boundary=4 CFLAGS-dlclose.c += -mpreferred-stack-boundary=4 CFLAGS-dlerror.c += -mpreferred-stack-boundary=4 endif + +ifneq (,$(filter -mno-tls-direct-seg-refs,$(CFLAGS))) +defines += -DNO_TLS_DIRECT_SEG_REFS +endif diff --git a/sysdeps/unix/i386/sysdep.S b/sysdeps/unix/i386/sysdep.S index 6056cbeef2..3bc872add8 100644 --- a/sysdeps/unix/i386/sysdep.S +++ b/sysdeps/unix/i386/sysdep.S @@ -1,4 +1,4 @@ -/* Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 2000, 2002, 2004 +/* Copyright (C) 1991,1992,1993,1994,1995,1996,1997,2000,2002,2004,2005 Free Software Foundation, Inc. This file is part of the GNU C Library. @@ -47,7 +47,12 @@ notb: #endif #ifndef PIC # if USE___THREAD +# ifndef NO_TLS_DIRECT_SEG_REFS movl %eax, %gs:C_SYMBOL_NAME(errno@NTPOFF) +# else + movl %gs:0, %ecx + movl %eax, C_SYMBOL_NAME(errno@NTPOFF)(%ecx) +# endif # elif !defined _LIBC_REENTRANT movl %eax, C_SYMBOL_NAME(errno) # else @@ -66,7 +71,12 @@ notb: /* Pop %ebx value saved before jumping here. */ popl %ebx +# ifndef NO_TLS_DIRECT_SEG_REFS + addl %gs:0, %ecx + movl %eax, (%ecx) +# else movl %eax, %gs:0(%ecx) +# endif # elif RTLD_PRIVATE_ERRNO movl %eax, C_SYMBOL_NAME(rtld_errno@GOTOFF)(%ebx) diff --git a/sysdeps/unix/sysv/linux/i386/sysdep.h b/sysdeps/unix/sysv/linux/i386/sysdep.h index af75d4c51a..02a35dc129 100644 --- a/sysdeps/unix/sysv/linux/i386/sysdep.h +++ b/sysdeps/unix/sysv/linux/i386/sysdep.h @@ -1,5 +1,5 @@ -/* Copyright (C) 1992,1993,1995-2000,2002,2003,2004 - Free Software Foundation, Inc. +/* Copyright (C) 1992,1993,1995,1996,1997,1998,1999,2000,2002,2003,2004,2005 + Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper, <drepper@gnu.org>, August 1995. @@ -154,9 +154,17 @@ __i686.get_pc_thunk.reg: \ movl SYSCALL_ERROR_ERRNO@GOTNTPOFF(%ecx), %ecx; \ xorl %edx, %edx; \ subl %eax, %edx; \ - movl %edx, %gs:0(%ecx); \ + SYSCALL_ERROR_HANDLER_TLS_STORE (%edx, %ecx); \ orl $-1, %eax; \ jmp L(pseudo_end); +# ifndef NO_TLS_DIRECT_SEG_REFS +# define SYSCALL_ERROR_HANDLER_TLS_STORE(src, destoff) \ + movl src, %gs:0(destoff) +# else +# define SYSCALL_ERROR_HANDLER_TLS_STORE(src, destoff) \ + addl %gs:0, destoff; \ + movl src, (destoff) +# endif # else # define SYSCALL_ERROR_HANDLER \ 0:pushl %ebx; \ |