diff options
| -rw-r--r-- | ChangeLog | 18 | ||||
| -rw-r--r-- | elf/tls-macros.h | 4 | ||||
| -rwxr-xr-x | sysdeps/i386/elf/configure | 5 | ||||
| -rw-r--r-- | sysdeps/i386/elf/configure.in | 3 | ||||
| -rw-r--r-- | sysdeps/unix/i386/sysdep.S | 15 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/i686/sysdep.h | 99 | ||||
| -rw-r--r-- | sysdeps/unix/x86_64/sysdep.S | 6 |
7 files changed, 44 insertions, 106 deletions
@@ -1,5 +1,23 @@ 2002-09-30 Roland McGrath <roland@redhat.com> + * elf/tls-macros.h (TLS_LD, TLS_GD): Use call insn, not callq. + + * sysdeps/unix/x86_64/sysdep.S [USE_TLS && HAVE___THREAD] [! PIC]: + Use direct-%fs form of TLS access for errno. + + * sysdeps/unix/sysv/linux/i386/i686/sysdep.h: File removed, since + the i386 version has all the same asm now. + + * sysdeps/i386/elf/configure.in: Add @GOTNTPOFF and @NTPOFF uses to + the TLS support check. + * sysdeps/i386/elf/configure: Regenerated. + + * sysdeps/unix/sysv/linux/i386/sysdep.h [USE_TLS && HAVE___THREAD] + (SYSCALL_ERROR_HANDLER): Use direct-%gs form of TLS access for errno. + + * sysdeps/unix/i386/sysdep.S (syscall_error) + [USE_TLS && HAVE___THREAD]: Use TLS access for errno. + * sysdeps/unix/sysv/linux/x86_64/sysdep.h [USE_TLS && HAVE___THREAD] (SYSCALL_ERROR_HANDLER): Use TLS access. diff --git a/elf/tls-macros.h b/elf/tls-macros.h index 2e3635d26f..6497903a9b 100644 --- a/elf/tls-macros.h +++ b/elf/tls-macros.h @@ -114,7 +114,7 @@ # define TLS_LD(x) \ ({ int *__l, __c, __d; \ asm ("leaq " #x "@tlsld(%%rip),%%rdi\n\t" \ - "callq __tls_get_addr@plt\n\t" \ + "call __tls_get_addr@plt\n\t" \ "leaq " #x "@dtpoff(%%rax), %%rax" \ : "=a" (__l), "=&c" (__c), "=&d" (__d) \ : : "rdi", "rsi", "r8", "r9", "r10", "r11"); \ @@ -124,7 +124,7 @@ ({ int *__l, __c, __d; \ asm (".long 0x66666666\n\t" \ "leaq " #x "@tlsgd(%%rip),%%rdi\n\t" \ - "callq __tls_get_addr@plt" \ + "call __tls_get_addr@plt" \ : "=a" (__l), "=&c" (__c), "=&d" (__d) \ : : "rdi", "rsi", "r8", "r9", "r10", "r11"); \ __l; }) diff --git a/sysdeps/i386/elf/configure b/sysdeps/i386/elf/configure index b9e5d7e79e..03f16fc798 100755 --- a/sysdeps/i386/elf/configure +++ b/sysdeps/i386/elf/configure @@ -20,8 +20,11 @@ baz: leal bar@TLSLDM(%ebx), %eax leal bar@DTPOFF(%eax), %edx subl foo@GOTTPOFF(%edx), %eax subl $bar@TPOFF, %eax + movl foo@GOTNTPOFF(%edx), %ecx + movl %gs:(%ecx), %eax + movl %gs:bar@NTPOFF, %eax EOF -if { ac_try='${CC-cc} -c $CFLAGS conftest.s 1>&5'; { (eval echo configure:25: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }; then +if { ac_try='${CC-cc} -c $CFLAGS conftest.s 1>&5'; { (eval echo configure:28: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }; then libc_cv_386_tls=yes else libc_cv_386_tls=no diff --git a/sysdeps/i386/elf/configure.in b/sysdeps/i386/elf/configure.in index 3c27d0171f..89a43b04b9 100644 --- a/sysdeps/i386/elf/configure.in +++ b/sysdeps/i386/elf/configure.in @@ -18,6 +18,9 @@ baz: leal bar@TLSLDM(%ebx), %eax leal bar@DTPOFF(%eax), %edx subl foo@GOTTPOFF(%edx), %eax subl $bar@TPOFF, %eax + movl foo@GOTNTPOFF(%edx), %ecx + movl %gs:(%ecx), %eax + movl %gs:bar@NTPOFF, %eax EOF dnl if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then diff --git a/sysdeps/unix/i386/sysdep.S b/sysdeps/unix/i386/sysdep.S index d1bd102708..294865877f 100644 --- a/sysdeps/unix/i386/sysdep.S +++ b/sysdeps/unix/i386/sysdep.S @@ -1,4 +1,5 @@ -/* Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 2000 Free Software Foundation, Inc. +/* Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 2000, 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 @@ -41,7 +42,9 @@ syscall_error: notb: #endif #ifndef PIC -# ifndef _LIBC_REENTRANT +# if USE_TLS && HAVE___THREAD + movl %eax, %gs:C_SYMBOL_NAME(errno@NTPOFF) +# elif !defined _LIBC_REENTRANT movl %eax, C_SYMBOL_NAME(errno) # else pushl %eax @@ -54,7 +57,13 @@ notb: #else /* The caller has pushed %ebx and then set it up to point to the GOT before calling us through the PLT. */ -# ifndef _LIBC_REENTRANT +# if USE_TLS && HAVE___THREAD + movl C_SYMBOL_NAME(errno@GOTNTPOFF)(%ebx), %ecx + + /* Pop %ebx value saved before jumping here. */ + popl %ebx + movl %eax, %gs:0(%ecx) +# elif !defined _LIBC_REENTRANT movl C_SYMBOL_NAME(errno@GOT)(%ebx), %ecx /* Pop %ebx value saved before jumping here. */ diff --git a/sysdeps/unix/sysv/linux/i386/i686/sysdep.h b/sysdeps/unix/sysv/linux/i386/i686/sysdep.h deleted file mode 100644 index 1cd335ad7b..0000000000 --- a/sysdeps/unix/sysv/linux/i386/i686/sysdep.h +++ /dev/null @@ -1,99 +0,0 @@ -/* Copyright (C) 1998, 2000, 2002 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper, <drepper@cygnus.com>, 1998. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#ifndef _LINUX_I386_I686_SYSDEP_H -#define _LINUX_I386_I686_SYSDEP_H 1 - -/* There is some commonality. */ -#include <sysdeps/unix/sysv/linux/i386/sysdep.h> -#include <bp-sym.h> -#include <bp-asm.h> - -/* We define special versions of the error handler code to match the i686's - deep branch prediction mechanism. */ -#ifdef PIC -# undef SYSCALL_ERROR_HANDLER - -# undef SETUP_PIC_REG -# ifndef HAVE_HIDDEN -# define SETUP_PIC_REG(reg) \ - call 1f; \ - .subsection 1; \ -1:movl (%esp), %e##reg; \ - ret; \ - .previous -# 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.reg -# endif - -/* 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(bx); \ - addl $_GLOBAL_OFFSET_TABLE_, %ebx; \ - xorl %edx, %edx; \ - subl %eax, %edx; \ - pushl %edx; \ - PUSH_ERRNO_LOCATION_RETURN; \ - call BP_SYM (__errno_location)@PLT; \ - POP_ERRNO_LOCATION_RETURN; \ - popl %ecx; \ - popl %ebx; \ - movl %ecx, (%eax); \ - orl $-1, %eax; \ - jmp L(pseudo_end); -/* A quick note: it is assumed that the call to `__errno_location' does - not modify the stack! */ -# endif -# else -# define SYSCALL_ERROR_HANDLER \ -0:SETUP_PIC_REG(cx); \ - addl $_GLOBAL_OFFSET_TABLE_, %ecx; \ - xorl %edx, %edx; \ - subl %eax, %edx; \ - movl errno@GOT(%ecx), %ecx; \ - movl %edx, (%ecx); \ - orl $-1, %eax; \ - jmp L(pseudo_end); -# endif /* _LIBC_REENTRANT */ -#endif /* PIC */ - -#endif /* linux/i386/i686/sysdep.h */ diff --git a/sysdeps/unix/x86_64/sysdep.S b/sysdeps/unix/x86_64/sysdep.S index a54c151013..b0580a39ae 100644 --- a/sysdeps/unix/x86_64/sysdep.S +++ b/sysdeps/unix/x86_64/sysdep.S @@ -42,8 +42,12 @@ syscall_error: notb: #endif #if USE_TLS && HAVE___THREAD - movq C_SYMBOL_NAME(errno)@GOTTPOFF(%rip), %rcx +# ifdef PIC + movq C_SYMBOL_NAME(errno@GOTTPOFF)(%rip), %rcx movl %eax, %fs:0(%rcx) +# else + movl %eax, %fs:C_SYMBOL_NAME(errno@TPOFF) +# endif #elif !defined PIC # ifndef _LIBC_REENTRANT movl %eax, C_SYMBOL_NAME(errno) |