1/*
2 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
4 */
5
6#include <stdio.h>
7#include <unistd.h>
8#include <stdlib.h>
9#include <sched.h>
10#include <errno.h>
11#include <sys/wait.h>
12#include <signal.h>
13#include "kern_util.h"
14#include "user.h"
15#include "ptrace_user.h"
16#include "os.h"
17
18void do_exec(int old_pid, int new_pid)
19{
20	unsigned long regs[FRAME_SIZE];
21	int err;
22
23	if((ptrace(PTRACE_ATTACH, new_pid, 0, 0) < 0) ||
24	   (ptrace(PTRACE_CONT, new_pid, 0, 0) < 0))
25		tracer_panic("do_exec failed to attach proc - errno = %d",
26			     errno);
27
28	CATCH_EINTR(err = waitpid(new_pid, 0, WUNTRACED));
29	if (err < 0)
30		tracer_panic("do_exec failed to attach proc in waitpid - errno = %d",
31			     errno);
32
33	if(ptrace_getregs(old_pid, regs) < 0)
34		tracer_panic("do_exec failed to get registers - errno = %d",
35			     errno);
36
37	os_kill_ptraced_process(old_pid, 0);
38
39	if (ptrace(PTRACE_OLDSETOPTIONS, new_pid, 0, (void *)PTRACE_O_TRACESYSGOOD) < 0)
40		tracer_panic("do_exec: PTRACE_SETOPTIONS failed, errno = %d", errno);
41
42	if(ptrace_setregs(new_pid, regs) < 0)
43		tracer_panic("do_exec failed to start new proc - errno = %d",
44			     errno);
45}
46
47/*
48 * Overrides for Emacs so that we follow Linus's tabbing style.
49 * Emacs will notice this stuff at the end of the file and automatically
50 * adjust the settings for this buffer only.  This must remain at the end
51 * of the file.
52 * ---------------------------------------------------------------------------
53 * Local variables:
54 * c-file-style: "linux"
55 * End:
56 */
57