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Code Issues Releases Wiki Activity

research st, add gdb info for setjmp.

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winlin 2014-11-09 11:56:14 +08:00
parent 4b24ee9db3
commit a27c3dca2d
2 changed files with 18 additions and 2 deletions
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18
trunk/research/arm/jmp_sp.cpp
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@ -46,7 +46,23 @@ void func0()
* functions as a setjmp/longjmp replacement wherever they are available * functions as a setjmp/longjmp replacement wherever they are available
* unless USE_LIBC_SETJMP is defined. * unless USE_LIBC_SETJMP is defined.
*/ */
// for glibc 2.4+, it's not possible to get and set the sp in jmp_buf // for glibc 2.4+, it's not possible to get and set the sp in jmp_buf
/**
for example, the following is show the jmp_buf when setjmp:
(gdb) x /64xb env_func1[0].__jmpbuf
0x600ca0 <env_func1>: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x600ca8 <env_func1+8>: 0xf8 0xc1 0x71 0xe5 0xa8 0x88 0xb4 0x15
0x600cb0 <env_func1+16>: 0xa0 0x05 0x40 0x00 0x00 0x00 0x00 0x00
0x600cb8 <env_func1+24>: 0x90 0xe4 0xff 0xff 0xff 0x7f 0x00 0x00
0x600cc0 <env_func1+32>: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x600cc8 <env_func1+40>: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x600cd0 <env_func1+48>: 0xf8 0xc1 0x51 0xe5 0xa8 0x88 0xb4 0x15
0x600cd8 <env_func1+56>: 0xf8 0xc1 0xd9 0x2f 0xd7 0x77 0x4b 0xea
(gdb) p /x $sp
$4 = 0x7fffffffe380
we cannot finger the sp out.
where the glibc is 2.12.
*/
register long int rsp0 asm("rsp"); register long int rsp0 asm("rsp");
int ret = setjmp(env_func1); int ret = setjmp(env_func1);

2
trunk/research/st/Makefile
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@ -124,7 +124,7 @@ $(SRS): $(OBJS)
$(TARGETDIR)/md.o: md.S $(TARGETDIR)/md.o: md.S
$(CC) $(CFLAGS) -c $< -o $@ $(CC) $(CFLAGS) -c $< -o $@
$(TARGETDIR)/%.o: %.c common.h md.h $(TARGETDIR)/%.o: %.c common.h md.h Makefile
$(CC) $(CFLAGS) -c $< -o $@ $(CC) $(CFLAGS) -c $< -o $@
clean: clean: