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restorer: Setup rt_sigframe to a proper address

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Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
This commit is contained in:
Cyrill Gorcunov 2011-11-03 15:24:40 +04:00
parent 345834ecee
commit f63777d2be
2 changed files with 5 additions and 13 deletions
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2
cr-restore.c
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@ -1303,7 +1303,7 @@ static void restorer_test(pid_t pid)
* Pass arguments and run a command.
*/
args = (struct restore_core_args *)(exec_start + args_offset);
args->rt_sigframe = (void *)((long)exec_mem + RESTORER_STACK_SIZE + RESTORER_STACK_REDZONE);
args->rt_sigframe = (void *)((long)exec_mem + RESTORER_STACK_SIZE + RESTORER_STACK_FRAME - RESTORER_STACK_REDZONE);
args->self_entry = exec_mem;
args->self_size = vma_len;

16
restorer.c
View file

@ -37,11 +37,6 @@
c += 'a' - 10; \
} while (0)
#define inline_memcpy(d,s,l) __builtin_memcpy(d,s,l)
#define inline_memset(d,c,l) __builtin_memset(d,c,l)
#define inline_memzero(d,l) __builtin_memset(d,0,l)
#define inline_memzero_p(d) __builtin_memset(d,0,sizeof(*(d)))
#define sigframe_addr(p) ((long)p)
static void always_inline write_char(char c)
@ -299,9 +294,7 @@ self_len_end:
* by the kernel with stack overflow error.
*/
rt_sigframe = args->rt_sigframe;
write_hex_n((long)rt_sigframe);
write_hex_n((long)&rt_sigframe->uc);
rt_sigframe = args->rt_sigframe - sizeof(*rt_sigframe);
#define CPREG1(d) rt_sigframe->uc.uc_mcontext.d = core_entry.u.arch.gpregs.d
#define CPREG2(d,s) rt_sigframe->uc.uc_mcontext.d = core_entry.u.arch.gpregs.s
@ -330,10 +323,9 @@ self_len_end:
/* FIXME: What with cr2 and friends which are rest there? */
new_sp = core_entry.u.arch.gpregs.sp - 8;
write_hex_n(new_sp);
stack = (void *)new_sp;
*stack = (long)rt_sigframe;
write_hex_n(0x111);
write_hex_n((long)rt_sigframe);
new_sp = (long)rt_sigframe + 8;
/*
* Prepare the stack and call for sigreturn,