2 * Copyright (C) 2015 John Crispin <blogic@openwrt.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU Lesser General Public License version 2.1
6 * as published by the Free Software Foundation
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
15 #include <sys/ptrace.h>
16 #include <sys/types.h>
24 #include "../preload.h"
26 #define ERROR(fmt, ...) do { \
27 fprintf(stderr,"perload-jail: "fmt, ## __VA_ARGS__); \
30 static main_t __main__;
32 static int __preload_main__(int argc, char **argv, char **envp)
34 unsetenv("LD_PRELOAD");
35 ptrace(PTRACE_TRACEME);
36 kill(getpid(), SIGSTOP);
38 return (*__main__)(argc, argv, envp);
41 int __libc_start_main(main_t main,
47 void (*rtld_fini) (void),
50 start_main_t __start_main__;
52 __start_main__ = dlsym(RTLD_NEXT, "__libc_start_main");
54 ERROR("failed to find __libc_start_main %s\n", dlerror());
58 return (*__start_main__)(__preload_main__, argc, argv, auxvec,
59 init, fini, rtld_fini, stack_end);
62 void __uClibc_main(main_t main,
65 void (*app_init)(void),
66 void (*app_fini)(void),
67 void (*rtld_fini)(void),
68 void *stack_end attribute_unused)
70 uClibc_main __start_main__;
72 __start_main__ = dlsym(RTLD_NEXT, "__uClibc_main");
74 ERROR("failed to find __uClibc_main %s\n", dlerror());
78 return (*__start_main__)(__preload_main__, argc, argv,
79 app_init, app_fini, rtld_fini, stack_end);