1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/types.h>
#include <sys/wait.h>
#include <signal.h>
#include <sys/ptrace.h>
#include <asm/ptrace.h>
#include "ltrace.h"
#include "debug.h"
#if (!defined(PTRACE_PEEKUSER) && defined(PTRACE_PEEKUSR))
# define PTRACE_PEEKUSER PTRACE_PEEKUSR
#endif
#if (!defined(PTRACE_POKEUSER) && defined(PTRACE_POKEUSR))
# define PTRACE_POKEUSER PTRACE_POKEUSR
#endif
void get_arch_dep(struct process *proc)
{
}
/* Returns 1 if syscall, 2 if sysret, 0 otherwise.
*/
int syscall_p(struct process *proc, int status, int *sysnum)
{
if (WIFSTOPPED(status) && WSTOPSIG(status) == SIGTRAP) {
char *ip = get_instruction_pointer(proc) - 4;
long x = ptrace(PTRACE_PEEKTEXT, proc->pid, ip, 0);
debug(2, "instr: %016lx", x);
if ((x & 0xffffffff) != 0x00000083)
return 0;
*sysnum =
ptrace(PTRACE_PEEKUSER, proc->pid, 0 /* REG_R0 */ , 0);
if (proc->callstack_depth > 0
&& proc->callstack[proc->callstack_depth - 1].is_syscall) {
return 2;
}
if (*sysnum >= 0 && *sysnum < 500) {
return 1;
}
}
return 0;
}
long gimme_arg(enum tof type, struct process *proc, int arg_num)
{
if (arg_num == -1) { /* return value */
return ptrace(PTRACE_PEEKUSER, proc->pid, 0 /* REG_R0 */ , 0);
}
if (type == LT_TOF_FUNCTION || type == LT_TOF_FUNCTIONR) {
if (arg_num <= 5)
return ptrace(PTRACE_PEEKUSER, proc->pid,
arg_num + 16 /* REG_A0 */ , 0);
else
return ptrace(PTRACE_PEEKTEXT, proc->pid,
proc->stack_pointer + 8 * (arg_num - 6),
0);
} else if (type == LT_TOF_SYSCALL || type == LT_TOF_SYSCALLR) {
return ptrace(PTRACE_PEEKUSER, proc->pid,
arg_num + 16 /* REG_A0 */ , 0);
} else {
fprintf(stderr, "gimme_arg called with wrong arguments\n");
exit(1);
}
return 0;
}
void save_register_args(enum tof type, struct process *proc)
{
}
|
