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2002-07-19  Ulrich Drepper  <drepper@redhat.com>

	* configure.in: Add test for __thread support in compiler.
	* config.h.in: Add HAVE___THREAD.
	* Makefile (headers): Remove errno.h, sys/errno.h, and bits/errno.h.
	* include/sys/errno.h: Moved to...
	* stdlib/sys/errno.h: ...here.  New file.
	* stdlib/errno.h: New file.  Moved from...
	* include/errno.h: ...here.  Changed into an internal header defining
	libc-local things like __set_errno.
	* stdlib/Makefile (headers): Add errno.h, sys/errno.h, and
	bits/errno.h.
	* elf/dl-minimal.c: Include <tls.h>.  Define errno as thread-local
	variable if USE_TLS && HAVE___THREAD.  Don't define __errno_location
	either.
	* elf/rtld.c (_dl_start): Add code to initialize TLS for ld.so
	from...
	(_dl_start_final): ...here.  Add code to initialize tls elements from
	bootstrap_map.
	* sysdeps/generic/errno-loc.c: Define errno as thread-local variable
	if USE_TLS && HAVE___THREAD.
	* sysdeps/generic/bits/errno.h: Remove __set_errno definition.
	* sysdeps/mach/hurd/bits/errno.h: Likewise.
	* sysdeps/standalone/arm/bits/errno.h: Likewise.
	* sysdeps/standalone/bits/errno.h: Likewise.
	* sysdeps/unix/bsd/bsd4.4/bits/errno.h: Likewise.
	* sysdeps/unix/sysv/aix/bits/errno.h: Likewise.
	* sysdeps/unix/sysv/hpux/bits/errno.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/errno.h: Likewise.
	* sysdeps/unix/sysv/linux/hppa/bits/errno.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/errno.h: Likewise.
	* sysdeps/unix/sysv/sysv4/solaris2/bits/errno.h: Likewise.
	* sysdeps/i386/dl-machine.c (elf_machine_rel) [RTLD_BOOTSTRAP]: Don't
	use GL(dl_rtld_map), use map parameter.
	* sysdeps/sh/dl-machine.h (elf_machine_rela): Likewise.
	* sysdeps/unix/sysv/linux/i386/sysdep.S: Define errno in .tbss if
	USE_TLS && HAVE___THREAD.
	* sysdeps/unix/sysv/linux/i386/sysdep.h: Unify SETUP_PIC_REG
	definitions.  If USE_TLS && HAVE___THREAD store errooor value using
	TLS code sequence.
	* sysdeps/unix/sysv/linux/i386/i686/sysdep.h: Likewise.

	* sysdeps/unix/sysv/linux/getcwd.c: No real need to restore errno.
	* sysdeps/unix/sysv/linux/grantpt.c: Likewise.
	* sysdeps/unix/sysv/linux/internal_statvfs.c: Likewise.
	* sysdeps/unix/sysv/linux/msgctl.c: Likewise.
	* sysdeps/unix/sysv/linux/readv.c: Likewise.
	* sysdeps/unix/sysv/linux/writev.c: Likewise.
This commit is contained in:
Ulrich Drepper
2002-07-20 01:14:41 +00:00
parent 9df63767d4
commit 739d440d2a
41 changed files with 447 additions and 350 deletions
Download Patch File Download Diff File Expand all files Collapse all files

72
sysdeps/unix/sysv/linux/i386/i686/sysdep.h
View File

@ -30,32 +30,44 @@
#ifdef PIC
# undef SYSCALL_ERROR_HANDLER
/* Store (- %eax) into errno through the GOT. */
# ifdef _LIBC_REENTRANT
# ifndef HAVE_HIDDEN
# define SETUP_PIC_REG \
# undef SETUP_PIC_REG
# ifndef HAVE_HIDDEN
# define SETUP_PIC_REG(reg) \
call 1f; \
.subsection 1; \
1:movl (%esp), %ebx; \
1:movl (%esp), %e##reg; \
ret; \
.previous
# else
# define SETUP_PIC_REG \
.section .gnu.linkonce.t.__i686.get_pc_thunk.bx,"ax",@progbits; \
.globl __i686.get_pc_thunk.bx; \
.hidden __i686.get_pc_thunk.bx; \
.type __i686.get_pc_thunk.bx,@function; \
__i686.get_pc_thunk.bx: \
movl (%esp), %ebx; \
# else
# define SETUP_PIC_REG(reg) \
.section .gnu.linkonce.t.__i686.get_pc_thunk.reg,"ax",@progbits; \
.globl __i686.get_pc_thunk.reg; \
.hidden __i686.get_pc_thunk.reg; \
.type __i686.get_pc_thunk.reg,@function; \
__i686.get_pc_thunk.reg: \
movl (%esp), %e##reg; \
ret; \
.previous; \
call __i686.get_pc_thunk.bx
# endif
call __i686.get_pc_thunk.reg
# endif
# define SYSCALL_ERROR_HANDLER \
/* Store (- %eax) into errno through the GOT. */
# ifdef _LIBC_REENTRANT
# if USE_TLS && HAVE___THREAD
# define SYSCALL_ERROR_HANDLER \
0:SETUP_PIC_REG (cx); \
addl $_GLOBAL_OFFSET_TABLE_, %ecx; \
xorl %edx, %edx; \
subl %eax, %edx; \
movl %gs:0, %eax; \
subl errno@gottpoff(%ecx), %eax; \
movl %edx, (%eax); \
orl $-1, %eax; \
jmp L(pseudo_end);
# else
# define SYSCALL_ERROR_HANDLER \
0:pushl %ebx; \
SETUP_PIC_REG; \
SETUP_PIC_REG(bx); \
addl $_GLOBAL_OFFSET_TABLE_, %ebx; \
xorl %edx, %edx; \
subl %eax, %edx; \
@ -70,30 +82,10 @@ __i686.get_pc_thunk.bx: \
jmp L(pseudo_end);
/* A quick note: it is assumed that the call to `__errno_location' does
not modify the stack! */
# else
# ifndef HAVE_HIDDEN
# define SETUP_PIC_REG \
call 1f; \
.subsection 1; \
1:movl (%esp), %ecx; \
ret; \
.previous
# else
# define SETUP_PIC_REG \
.section .gnu.linkonce.t.__i686.get_pc_thunk.cx,"ax",@progbits; \
.globl __i686.get_pc_thunk.cx; \
.hidden __i686.get_pc_thunk.cx; \
.type __i686.get_pc_thunk.cx,@function; \
__i686.get_pc_thunk.cx: \
movl (%esp), %ecx; \
ret; \
.previous; \
call __i686.get_pc_thunk.cx
# endif
# else
# define SYSCALL_ERROR_HANDLER \
0:SETUP_PIC_REG; \
0:SETUP_PIC_REG(cx); \
addl $_GLOBAL_OFFSET_TABLE_, %ecx; \
xorl %edx, %edx; \
subl %eax, %edx; \

13
sysdeps/unix/sysv/linux/i386/sysdep.S
View File

@ -1,4 +1,4 @@
/* Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
/* Copyright (C) 1995, 1996, 1997, 1998, 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
@ -17,6 +17,7 @@
02111-1307 USA. */
#include <sysdep.h>
#include <tls.h>
/* Because the Linux version is in fact i386/ELF and the start.? file
for this system (sysdeps/i386/elf/start.S) is also used by The Hurd
@ -25,13 +26,21 @@
it somewhere else.
...and this place is here. */
#if USE_TLS && HAVE___THREAD
.section .tbss
#else
.bss
#endif
.globl errno
.type errno,@object
.size errno,4
.globl _errno
.type _errno,@object
.size _errno,4
.align 4
errno:
_errno:
.space 4
weak_alias (errno, _errno)
/* The following code is only used in the shared library when we
compile the reentrant version. Otherwise each system call defines

72
sysdeps/unix/sysv/linux/i386/sysdep.h
View File

@ -24,6 +24,7 @@
#include <sysdeps/unix/i386/sysdep.h>
#include <bp-sym.h>
#include <bp-asm.h>
#include <tls.h>
/* For Linux we can use the system call table in the header file
/usr/include/asm/unistd.h
@ -72,34 +73,47 @@
END (name)
#ifndef PIC
#define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */
# define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */
#else
/* Store (- %eax) into errno through the GOT. */
#ifdef _LIBC_REENTRANT
# ifndef HAVE_HIDDEN
# define SETUP_PIC_REG \
# define SETUP_PIC_REG(reg) \
call 1f; \
.subsection 1; \
1:movl (%esp), %ebx; \
1:movl (%esp), %e##reg; \
ret; \
.previous
# else
# define SETUP_PIC_REG \
.section .gnu.linkonce.t.__i686.get_pc_thunk.bx,"ax",@progbits; \
.globl __i686.get_pc_thunk.bx; \
.hidden __i686.get_pc_thunk.bx; \
.type __i686.get_pc_thunk.bx,@function; \
__i686.get_pc_thunk.bx: \
movl (%esp), %ebx; \
# define SETUP_PIC_REG(reg) \
.section .gnu.linkonce.t.__i686.get_pc_thunk.reg,"ax",@progbits; \
.globl __i686.get_pc_thunk.reg; \
.hidden __i686.get_pc_thunk.reg; \
.type __i686.get_pc_thunk.reg,@function; \
__i686.get_pc_thunk.reg: \
movl (%esp), %e##reg; \
ret; \
.previous; \
call __i686.get_pc_thunk.bx
call __i686.get_pc_thunk.reg
# endif
#define SYSCALL_ERROR_HANDLER \
/* Store (- %eax) into errno through the GOT. */
# ifdef _LIBC_REENTRANT
# if USE_TLS && HAVE___THREAD
# define SYSCALL_ERROR_HANDLER \
0:SETUP_PIC_REG (cx); \
addl $_GLOBAL_OFFSET_TABLE_, %ecx; \
xorl %edx, %edx; \
subl %eax, %edx; \
movl %gs:0, %eax; \
subl errno@gottpoff(%ecx), %eax; \
movl %edx, (%eax); \
orl $-1, %eax; \
jmp L(pseudo_end);
# else
# define SYSCALL_ERROR_HANDLER \
0:pushl %ebx; \
SETUP_PIC_REG; \
SETUP_PIC_REG (bx); \
addl $_GLOBAL_OFFSET_TABLE_, %ebx; \
xorl %edx, %edx; \
subl %eax, %edx; \
@ -114,30 +128,10 @@ __i686.get_pc_thunk.bx: \
jmp L(pseudo_end);
/* A quick note: it is assumed that the call to `__errno_location' does
not modify the stack! */
#else
# ifndef HAVE_HIDDEN
# define SETUP_PIC_REG \
call 1f; \
.subsection 1; \
1:movl (%esp), %ecx; \
ret; \
.previous
# endif
# else
# define SETUP_PIC_REG \
.section .gnu.linkonce.t.__i686.get_pc_thunk.cx,"ax",@progbits; \
.globl __i686.get_pc_thunk.cx; \
.hidden __i686.get_pc_thunk.cx; \
.type __i686.get_pc_thunk.cx,@function; \
__i686.get_pc_thunk.cx: \
movl (%esp), %ecx; \
ret; \
.previous; \
call __i686.get_pc_thunk.cx
# endif
#define SYSCALL_ERROR_HANDLER \
0:define SETUP_PIC_REG; \
# define SYSCALL_ERROR_HANDLER \
0:define SETUP_PIC_REG(cx); \
addl $_GLOBAL_OFFSET_TABLE_, %ecx; \
xorl %edx, %edx; \
subl %eax, %edx; \
@ -145,7 +139,7 @@ __i686.get_pc_thunk.cx: \
movl %edx, (%ecx); \
orl $-1, %eax; \
jmp L(pseudo_end);
#endif /* _LIBC_REENTRANT */
# endif /* _LIBC_REENTRANT */
#endif /* PIC */
/* Linux takes system call arguments in registers: