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Use macros for x86 PIC thunk names.

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This commit is contained in:
Joseph Myers 2012-02-03 23:24:19 +00:00
parent 9a1d92541f
commit b1da7dd99d
3 changed files with 28 additions and 15 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2012-02-03 Joseph Myers <joseph@codesourcery.com>
* sysdeps/i386/sysdep.h (GET_PC_THUNK, GET_PC_THUNK_STR): Define.
(SETUP_PIC_REG): Use GET_PC_THUNK.
* sysdeps/unix/sysv/linux/i386/sysdep.h: Use GET_PC_THUNK_STR
macro.
2012-02-03 Joseph Myers <joseph@codesourcery.com>
* sysdeps/i386/sysdep.h (SETUP_PIC_REG, LOAD_PIC_REG): Define also

22
sysdeps/i386/sysdep.h
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@ -20,6 +20,12 @@
#include <sysdeps/generic/sysdep.h>
#ifdef __ASSEMBLER__
# define GET_PC_THUNK(reg) __i686.get_pc_thunk.reg
#else
# define GET_PC_THUNK_STR(reg) "__i686.get_pc_thunk." #reg
#endif
#ifdef __ASSEMBLER__
/* Syntactic details of assembler. */
@ -110,19 +116,19 @@ lose: SYSCALL_PIC_SETUP \
END (name)
# define SETUP_PIC_REG(reg) \
.ifndef __i686.get_pc_thunk.reg; \
.section .gnu.linkonce.t.__i686.get_pc_thunk.reg,"ax",@progbits; \
.globl __i686.get_pc_thunk.reg; \
.hidden __i686.get_pc_thunk.reg; \
.ifndef GET_PC_THUNK(reg); \
.section .gnu.linkonce.t.GET_PC_THUNK(reg),"ax",@progbits; \
.globl GET_PC_THUNK(reg); \
.hidden GET_PC_THUNK(reg); \
.p2align 4; \
.type __i686.get_pc_thunk.reg,@function; \
__i686.get_pc_thunk.reg: \
.type GET_PC_THUNK(reg),@function; \
GET_PC_THUNK(reg): \
movl (%esp), %e##reg; \
ret; \
.size __i686.get_pc_thunk.reg, . - __i686.get_pc_thunk.reg; \
.size GET_PC_THUNK(reg), . - GET_PC_THUNK(reg); \
.previous; \
.endif; \
call __i686.get_pc_thunk.reg
call GET_PC_THUNK(reg)
# define LOAD_PIC_REG(reg) \
SETUP_PIC_REG(reg); addl $_GLOBAL_OFFSET_TABLE_, %e##reg

14
sysdeps/unix/sysv/linux/i386/sysdep.h
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@ -1,4 +1,4 @@
/* Copyright (C) 1992,1993,1995-2000,2002-2006,2007,2011
/* Copyright (C) 1992,1993,1995-2000,2002-2006,2007,2011-2012
Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper, <drepper@gnu.org>, August 1995.
@ -514,17 +514,17 @@ asm (".L__X'%ebx = 1\n\t"
# define check_consistency() \
({ int __res; \
__asm__ __volatile__ \
("call __i686.get_pc_thunk.cx;" \
("call "GET_PC_THUNK_STR(cx)";" \
"addl $_GLOBAL_OFFSET_TABLE_, %%ecx;" \
"subl %%ebx, %%ecx;" \
"je 1f;" \
"ud2;" \
"1:\n" \
".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:" \
".section .gnu.linkonce.t."GET_PC_THUNK_STR(cx)",\"ax\",@progbits;" \
".globl "GET_PC_THUNK_STR(cx)";" \
".hidden "GET_PC_THUNK_STR(cx)";" \
".type "GET_PC_THUNK_STR(cx)",@function;" \
GET_PC_THUNK_STR(cx)":" \
"movl (%%esp), %%ecx;" \
"ret;" \
".previous" \