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Android is all-PIC/PIE.

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Clean up the x86/x86_64 assembler. The motivator (other than reducing
confusion) was that asm.h incorrectly checked PIC rather than __PIC__.

Bug: 16823325

(cherry picked from commit 6b6364a7fc)

Change-Id: I89ca57fa0eb34a36de6cb11ea85f71054fce709d
This commit is contained in:
Elliott Hughes 2014-08-07 10:51:32 -07:00
parent 3e7b8e2a8b
commit 43227c0b40
7 changed files with 2 additions and 50 deletions
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7
libc/arch-x86/bionic/__stack_chk_fail_local.h
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@ -26,6 +26,7 @@
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
/*
__stack_chk_fail routine is runtime part of stack protector compiler
@ -48,13 +49,9 @@
*/
#ifdef __i386__
#ifdef __PIC__
extern void __stack_chk_fail();
__attribute__ ((visibility ("hidden")))
void __stack_chk_fail_local()
{
__LIBC_HIDDEN__ void __stack_chk_fail_local() {
__stack_chk_fail();
}
#endif
#endif

8
libc/arch-x86/bionic/setjmp.S
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@ -46,11 +46,7 @@
ENTRY(setjmp)
PIC_PROLOGUE
pushl $0
#ifdef PIC
call PIC_PLT(sigblock)
#else
call sigblock
#endif
addl $4,%esp
PIC_EPILOGUE
@ -71,11 +67,7 @@ ENTRY(longjmp)
movl 4(%esp),%edx
PIC_PROLOGUE
pushl 24(%edx)
#ifdef PIC
call PIC_PLT(sigsetmask)
#else
call sigsetmask
#endif
addl $4,%esp
PIC_EPILOGUE

8
libc/arch-x86/bionic/sigsetjmp.S
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@ -42,11 +42,7 @@ ENTRY(sigsetjmp)
PIC_PROLOGUE
pushl $0
#ifdef PIC
call PIC_PLT(sigblock)
#else
call sigblock
#endif
addl $4,%esp
PIC_EPILOGUE
@ -70,11 +66,7 @@ ENTRY(siglongjmp)
PIC_PROLOGUE
pushl 24(%edx)
#ifdef PIC
call PIC_PLT(sigsetmask)
#else
call sigsetmask
#endif
addl $4,%esp
PIC_EPILOGUE

8
libc/arch-x86/include/machine/asm.h
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@ -37,7 +37,6 @@
#ifndef _I386_ASM_H_
#define _I386_ASM_H_
#ifdef PIC
#define PIC_PROLOGUE \
pushl %ebx; \
call 1f; \
@ -49,13 +48,6 @@
#define PIC_PLT(x) x@PLT
#define PIC_GOT(x) x@GOT(%ebx)
#define PIC_GOTOFF(x) x@GOTOFF(%ebx)
#else
#define PIC_PROLOGUE
#define PIC_EPILOGUE
#define PIC_PLT(x) x
#define PIC_GOT(x) x
#define PIC_GOTOFF(x) x
#endif
/* let kernels and others override entrypoint alignment */
#if !defined(_ALIGN_TEXT) && !defined(_KERNEL)

8
libc/arch-x86_64/bionic/setjmp.S
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@ -52,11 +52,7 @@
ENTRY(setjmp)
pushq %rdi
xorq %rdi,%rdi
#ifdef __PIC__
call PIC_PLT(sigblock)
#else
call sigblock
#endif
popq %rdi
movq %rax,(_JB_SIGMASK * 8)(%rdi)
@ -80,11 +76,7 @@ ENTRY(longjmp)
movq (_JB_SIGMASK * 8)(%rdi),%rdi
pushq %r8
#ifdef __PIC__
call PIC_PLT(sigsetmask)
#else
call sigsetmask
#endif
popq %r8
movq (_JB_RBX * 8)(%r12),%rbx
movq (_JB_RBP * 8)(%r12),%rbp

8
libc/arch-x86_64/bionic/sigsetjmp.S
View File

@ -57,11 +57,7 @@ ENTRY(sigsetjmp)
pushq %rdi
xorq %rdi,%rdi
#ifdef __PIC__
call PIC_PLT(sigblock)
#else
call sigblock
#endif
popq %rdi
movq %rax,(_JB_SIGMASK * 8)(%rdi)
@ -86,11 +82,7 @@ ENTRY(siglongjmp)
jz 2f
movq (_JB_SIGMASK * 8)(%rdi),%rdi
#ifdef __PIC__
call PIC_PLT(sigsetmask)
#else
call sigsetmask
#endif
2: popq %rax
movq (_JB_RBX * 8)(%r12),%rbx
movq (_JB_RBP * 8)(%r12),%rbp

5
libc/arch-x86_64/include/machine/asm.h
View File

@ -37,13 +37,8 @@
#ifndef _AMD64_ASM_H_
#define _AMD64_ASM_H_
#ifdef __PIC__
#define PIC_PLT(x) x@PLT
#define PIC_GOT(x) x@GOTPCREL(%rip)
#else
#define PIC_PLT(x) x
#define PIC_GOT(x) x
#endif
/* let kernels and others override entrypoint alignment */
#ifndef _ALIGN_TEXT