2 * Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
8 #include <asm/unistd.h>
10 #include "as-layout.h"
11 #include "kern_constants.h"
12 #include "ptrace_user.h"
13 #include "stub-data.h"
14 #include "sysdep/stub.h"
17 * This is in a separate file because it needs to be compiled with any
18 * extraneous gcc flags (-pg, -fprofile-arcs, -ftest-coverage) disabled
20 * Use UM_KERN_PAGE_SIZE instead of PAGE_SIZE because that calls getpagesize
24 void __attribute__ ((__section__ (".__syscall_stub")))
25 stub_clone_handler(void)
27 struct stub_data *data = (struct stub_data *) STUB_DATA;
30 err = stub_syscall2(__NR_clone, CLONE_PARENT | CLONE_FILES | SIGCHLD,
31 STUB_DATA + UM_KERN_PAGE_SIZE / 2 - sizeof(void *));
35 err = stub_syscall4(__NR_ptrace, PTRACE_TRACEME, 0, 0, 0);
39 err = stub_syscall3(__NR_setitimer, ITIMER_VIRTUAL,
40 (long) &data->timer, 0);
44 remap_stack(data->fd, data->offset);
49 * save current result.
51 * child: retcode of mmap already saved and it jumps around this