trace.c revision 2d45b1a8e26a36a9f85dc49e721c4390ca93dc40 
1#if HAVE_CONFIG_H
2#include "config.h"
3#endif
4
5#include <sys/types.h>
6#include <sys/wait.h>
7#include <signal.h>
8#include <sys/ptrace.h>
9#include <asm/ptrace.h>
10
11#include "ltrace.h"
12
13#if (!defined(PTRACE_PEEKUSER) && defined(PTRACE_PEEKUSR))
14# define PTRACE_PEEKUSER PTRACE_PEEKUSR
15#endif
16
17#if (!defined(PTRACE_POKEUSER) && defined(PTRACE_POKEUSR))
18# define PTRACE_POKEUSER PTRACE_POKEUSR
19#endif
20
21void get_arch_dep(struct process *proc)
22{
23}
24
25/* Returns 1 if syscall, 2 if sysret, 0 otherwise.
26 */
27int syscall_p(struct process *proc, int status, int *sysnum)
28{
29	int depth;
30
31	if (WIFSTOPPED(status)
32	    && WSTOPSIG(status) == (SIGTRAP | proc->tracesysgood)) {
33		*sysnum = ptrace(PTRACE_PEEKUSER, proc->pid, 4 * PT_ORIG_D0, 0);
34		if (*sysnum == -1)
35			return 0;
36		if (*sysnum >= 0) {
37			depth = proc->callstack_depth;
38			if (depth > 0 &&
39			    proc->callstack[depth - 1].is_syscall &&
40			    proc->callstack[depth - 1].c_un.syscall ==
41			    *sysnum) {
42				return 2;
43			} else {
44				return 1;
45			}
46		}
47	}
48	return 0;
49}
50
51long gimme_arg(enum tof type, struct process *proc, int arg_num)
52{
53	if (arg_num == -1) {	/* return value */
54		return ptrace(PTRACE_PEEKUSER, proc->pid, 4 * PT_D0, 0);
55	}
56
57	if (type == LT_TOF_FUNCTION || type == LT_TOF_FUNCTIONR) {
58		return ptrace(PTRACE_PEEKTEXT, proc->pid,
59			      proc->stack_pointer + 4 * (arg_num + 1), 0);
60	} else if (type == LT_TOF_SYSCALL || type == LT_TOF_SYSCALLR) {
61#if 0
62		switch (arg_num) {
63		case 0:
64			return ptrace(PTRACE_PEEKUSER, proc->pid, 4 * PT_D1, 0);
65		case 1:
66			return ptrace(PTRACE_PEEKUSER, proc->pid, 4 * PT_D2, 0);
67		case 2:
68			return ptrace(PTRACE_PEEKUSER, proc->pid, 4 * PT_D3, 0);
69		case 3:
70			return ptrace(PTRACE_PEEKUSER, proc->pid, 4 * PT_D4, 0);
71		case 4:
72			return ptrace(PTRACE_PEEKUSER, proc->pid, 4 * PT_D5, 0);
73		default:
74			fprintf(stderr,
75				"gimme_arg called with wrong arguments\n");
76			exit(2);
77		}
78#else
79		/* That hack works on m68k, too */
80		return ptrace(PTRACE_PEEKUSER, proc->pid, 4 * arg_num, 0);
81#endif
82	} else {
83		fprintf(stderr, "gimme_arg called with wrong arguments\n");
84		exit(1);
85	}
86
87	return 0;
88}
89
90void save_register_args(enum tof type, struct process *proc)
91{
92}
93