1 /**********************************************************************
4 Copyright (C) 1999 Lars Brinkhoff. See the file COPYING for licensing
6 **********************************************************************/
13 #include <sys/types.h>
14 #include <linux/unistd.h>
15 #include "ptrace_user.h"
19 int get_syscall(pid_t pid, long *arg1, long *arg2, long *arg3, long *arg4,
22 *arg1 = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_ARG1_OFFSET, 0);
23 *arg2 = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_ARG2_OFFSET, 0);
24 *arg3 = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_ARG3_OFFSET, 0);
25 *arg4 = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_ARG4_OFFSET, 0);
26 *arg5 = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_ARG5_OFFSET, 0);
27 return(ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_NR_OFFSET, 0));
30 void syscall_cancel(pid_t pid, int result)
32 if((ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_NR_OFFSET,
34 (ptrace(PTRACE_SYSCALL, pid, 0, 0) < 0) ||
35 (wait_for_stop(pid, SIGTRAP, PTRACE_SYSCALL, NULL) < 0) ||
36 (ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_RET_OFFSET, result) < 0) ||
37 (ptrace(PTRACE_SYSCALL, pid, 0, 0) < 0))
38 printk("ptproxy: couldn't cancel syscall: errno = %d\n",
42 void syscall_set_result(pid_t pid, long result)
44 ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_RET_OFFSET, result);
47 void syscall_continue(pid_t pid)
49 ptrace(PTRACE_SYSCALL, pid, 0, 0);
52 int syscall_pause(pid_t pid)
54 if(ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_NR_OFFSET, __NR_pause) < 0){
55 printk("syscall_change - ptrace failed, errno = %d\n", errno);
62 * Overrides for Emacs so that we follow Linus's tabbing style.
63 * Emacs will notice this stuff at the end of the file and automatically
64 * adjust the settings for this buffer only. This must remain at the end
66 * ---------------------------------------------------------------------------
68 * c-file-style: "linux"