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2005-01-23 Roland McGrath <roland@redhat.com>

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* 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.
This commit is contained in:
Roland McGrath 2005-01-26 02:05:49 +00:00
parent 792dcd77cd
commit 70a8119bf0
3 changed files with 26 additions and 4 deletions
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4
sysdeps/i386/Makefile
View File

@ -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

12
sysdeps/unix/i386/sysdep.S
View File

@ -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)

14
sysdeps/unix/sysv/linux/i386/sysdep.h
View File

@ -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; \