regs.c revision 8f8282f72eaeadc5419cd5470100e8dcaba5b7fd 
1#if HAVE_CONFIG_H
2#include "config.h"
3#endif
4
5#include <sys/types.h>
6#include <sys/ptrace.h>
7#include <asm/ptrace.h>
8
9#if (!defined(PTRACE_PEEKUSER) && defined(PTRACE_PEEKUSR))
10# define PTRACE_PEEKUSER PTRACE_PEEKUSR
11#endif
12
13#if (!defined(PTRACE_POKEUSER) && defined(PTRACE_POKEUSR))
14# define PTRACE_POKEUSER PTRACE_POKEUSR
15#endif
16
17#define off_pc 60
18#define off_lr 56
19#define off_sp 52
20
21void *
22get_instruction_pointer(pid_t pid) {
23	return (void *)ptrace(PTRACE_PEEKUSER, pid, off_pc, 0);
24}
25
26void
27set_instruction_pointer(pid_t pid, long addr) {
28	ptrace(PTRACE_POKEUSER, pid, off_pc, addr);
29}
30
31void *
32get_stack_pointer(pid_t pid) {
33	return (void *)ptrace(PTRACE_PEEKUSER, pid, off_sp, 0);
34}
35
36/* really, this is given the *stack_pointer expecting
37 * a CISC architecture; in our case, we don't need that */
38void *
39get_return_addr(pid_t pid, void * stack_pointer) {
40	return (void *)ptrace(PTRACE_PEEKUSER, pid, off_lr, 0);
41}
42