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research st, only for linux and arm/mips/i386/x86_64 cpus.

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winlin 2014-11-09 11:46:32 +08:00
parent 9172dc14dc
commit 4b24ee9db3
5 changed files with 184 additions and 549 deletions
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50
trunk/research/arm/jmp_sp.cpp
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@ -33,25 +33,20 @@ void func0()
};
*/
#if defined(__amd64__) || defined(__x86_64__)
/**
here, the __jmp_buf is 8*8=64 bytes
# if __WORDSIZE == 64
typedef long int __jmp_buf[8];
*/
/**
the layout for setjmp of x86_64
#
# The jmp_buf is assumed to contain the following, in order:
# %rbx
# %rsp (post-return)
# %rbp
# %r12
# %r13
# %r14
# %r15
# <return address>
#
*/
// http://ftp.gnu.org/gnu/glibc/glibc-2.12.2.tar.xz
// http://ftp.gnu.org/gnu/glibc/glibc-2.12.1.tar.gz
/*
* Starting with glibc 2.4, JB_SP definitions are not public anymore.
* They, however, can still be found in glibc source tree in
* architecture-specific "jmpbuf-offsets.h" files.
* Most importantly, the content of jmp_buf is mangled by setjmp to make
* it completely opaque (the mangling can be disabled by setting the
* LD_POINTER_GUARD environment variable before application execution).
* Therefore we will use built-in _st_md_cxt_save/_st_md_cxt_restore
* functions as a setjmp/longjmp replacement wherever they are available
* unless USE_LIBC_SETJMP is defined.
*/
// for glibc 2.4+, it's not possible to get and set the sp in jmp_buf
register long int rsp0 asm("rsp");
int ret = setjmp(env_func1);
@ -64,7 +59,9 @@ void func0()
printf("\n");
func1();
#else
#endif
#if defined(__arm__)
/**
/usr/arm-linux-gnueabi/include/bits/setjmp.h
#ifndef _ASM
@ -115,13 +112,18 @@ void func0()
#endif
}
extern uintptr_t _jmpbuf_sp (__jmp_buf regs);
int main(int argc, char** argv) {
#if defined(__amd64__) || defined(__x86_64__)
printf("x86_64 sizeof(long int)=%d, sizeof(long)=%d, sizeof(int)=%d, __WORDSIZE=%d\n",
(int)sizeof(long int), (int)sizeof(long), (int)sizeof(int), (int)__WORDSIZE);
printf("x86_64 sizeof(long int)=%d, sizeof(long)=%d, "
"sizeof(int)=%d, __WORDSIZE=%d, __GLIBC__=%d, __GLIBC_MINOR__=%d\n",
(int)sizeof(long int), (int)sizeof(long), (int)sizeof(int),
(int)__WORDSIZE, (int)__GLIBC__, (int)__GLIBC_MINOR__);
#else
printf("arm sizeof(long int)=%d, sizeof(long)=%d, sizeof(int)=%d\n",
(int)sizeof(long int), (int)sizeof(long), (int)sizeof(int));
printf("arm sizeof(long int)=%d, sizeof(long)=%d, "
"sizeof(int)=%d, __GLIBC__=%d,__GLIBC_MINOR__=%d\n",
(int)sizeof(long int), (int)sizeof(long), (int)sizeof(int),
(int)__GLIBC__, (int)__GLIBC_MINOR__);
#endif
func0();