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Use macro for PIC setup in inline asm.

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This commit is contained in:
Joseph Myers 2012-02-05 14:34:14 +00:00
parent b1da7dd99d
commit d8e0ca509a
3 changed files with 28 additions and 10 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2012-02-05 Joseph Myers <joseph@codesourcery.com>
* sysdeps/i386/sysdep.h (SETUP_PIC_REG_STR, LOAD_PIC_REG_STR):
Define.
* sysdeps/unix/sysv/linux/i386/sysdep.h (check_consistency): Use
LOAD_PIC_REG_STR.
2012-02-03 Joseph Myers <joseph@codesourcery.com>
* sysdeps/i386/sysdep.h (GET_PC_THUNK, GET_PC_THUNK_STR): Define.

20
sysdeps/i386/sysdep.h
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@ -156,4 +156,24 @@ GET_PC_THUNK(reg): \
#define atom_text_section .section ".text.atom", "ax"
#else /* __ASSEMBLER__ */
# define SETUP_PIC_REG_STR(reg) \
".ifndef " GET_PC_THUNK_STR (reg) "\n" \
".section .gnu.linkonce.t." GET_PC_THUNK_STR (reg) ",\"ax\",@progbits\n" \
".globl " GET_PC_THUNK_STR (reg) "\n" \
".hidden " GET_PC_THUNK_STR (reg) "\n" \
".p2align 4\n" \
".type " GET_PC_THUNK_STR (reg) ",@function\n" \
GET_PC_THUNK_STR (reg) ":" \
"movl (%%esp), %%e" #reg "\n" \
"ret\n" \
".size " GET_PC_THUNK_STR (reg) ", . - " GET_PC_THUNK_STR (reg) "\n" \
".previous\n" \
".endif\n" \
"call " GET_PC_THUNK_STR (reg)
# define LOAD_PIC_REG_STR(reg) \
SETUP_PIC_REG_STR (reg) "\naddl $_GLOBAL_OFFSET_TABLE_, %%e" #reg
#endif /* __ASSEMBLER__ */

11
sysdeps/unix/sysv/linux/i386/sysdep.h
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@ -514,20 +514,11 @@ asm (".L__X'%ebx = 1\n\t"
# define check_consistency() \
({ int __res; \
__asm__ __volatile__ \
("call "GET_PC_THUNK_STR(cx)";" \
"addl $_GLOBAL_OFFSET_TABLE_, %%ecx;" \
(LOAD_PIC_REG_STR (cx) ";" \
"subl %%ebx, %%ecx;" \
"je 1f;" \
"ud2;" \
"1:\n" \
".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" \
: "=c" (__res)); \
__res; })
#endif