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authorRoland McGrath <roland@gnu.org>2005-01-26 02:05:49 +0000
committerRoland McGrath <roland@gnu.org>2005-01-26 02:05:49 +0000
commit70a8119bf0429692aa5ce181c79470ab2f3e3681 (patch)
tree4989572441907b6734364639d4011566f18c49ed /sysdeps
parent792dcd77cdafb46c746119e250a5ba9d20598f8f (diff)
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2005-01-23 Roland McGrath <roland@redhat.com>
* sysdeps/i386/Makefile (defines): If -mno-tls-direct-seg-refs appears in $(CFLAGS), add -DNO_TLS_DIRECT_SEG_REFS. * sysdeps/unix/sysv/linux/i386/sysdep.h [USE___THREAD] (SYSCALL_ERROR_HANDLER) [NO_TLS_DIRECT_SEG_REFS]: Load thread pointer from %gs:0 and add to that value, rather that direct %gs:OFFSET access. * sysdeps/unix/i386/sysdep.S [NO_TLS_DIRECT_SEG_REFS]: Likewise.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/i386/Makefile4
-rw-r--r--sysdeps/unix/i386/sysdep.S12
-rw-r--r--sysdeps/unix/sysv/linux/i386/sysdep.h14
3 files changed, 26 insertions, 4 deletions
diff --git a/sysdeps/i386/Makefile b/sysdeps/i386/Makefile
index 52faaa3..ece94f3 100644
--- a/sysdeps/i386/Makefile
+++ b/sysdeps/i386/Makefile
@@ -61,3 +61,7 @@ CFLAGS-dlopenold.c += -mpreferred-stack-boundary=4
CFLAGS-dlclose.c += -mpreferred-stack-boundary=4
CFLAGS-dlerror.c += -mpreferred-stack-boundary=4
endif
+
+ifneq (,$(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 6056cbe..3bc872a 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 af75d4c..02a35dc 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; \