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d1e44df1 | 1 | /* Entry-point for programs. NaCl version. |
bfff8b1b | 2 | Copyright (C) 2015-2017 Free Software Foundation, Inc. |
d1e44df1 RM |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | In addition to the permissions in the GNU Lesser General Public | |
11 | License, the Free Software Foundation gives you unlimited | |
12 | permission to link the compiled version of this file with other | |
13 | programs, and to distribute those programs without any restriction | |
14 | coming from the use of this file. (The GNU Lesser General Public | |
15 | License restrictions do apply in other respects; for example, they | |
16 | cover modification of the file, and distribution when not linked | |
17 | into another program.) | |
18 | ||
19 | Note that people who make modified versions of this file are not | |
20 | obligated to grant this special exception for their modified | |
21 | versions; it is their choice whether to do so. The GNU Lesser | |
22 | General Public License gives permission to release a modified | |
23 | version without this exception; this exception also makes it | |
24 | possible to release a modified version which carries forward this | |
25 | exception. | |
26 | ||
27 | The GNU C Library is distributed in the hope that it will be useful, | |
28 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
29 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
30 | Lesser General Public License for more details. | |
31 | ||
32 | You should have received a copy of the GNU Lesser General Public | |
33 | License along with the GNU C Library; if not, see | |
34 | <http://www.gnu.org/licenses/>. */ | |
35 | ||
36 | #include <stdint.h> | |
37 | #include <link.h> | |
38 | ||
39 | /* NaCl's elf32.h is incompatible with the real <elf.h>. */ | |
40 | #define NATIVE_CLIENT_SRC_INCLUDE_ELF32_H_ | |
41 | #include <native_client/src/untrusted/nacl/nacl_startup.h> | |
42 | ||
43 | ||
44 | /* The application defines this, of course. */ | |
45 | extern int main (int argc, char **argv, char **envp); | |
46 | ||
f9719493 RM |
47 | /* But maybe it defines this too, in which case it takes precedence. */ |
48 | extern int __nacl_main (int argc, char **argv, char **envp) | |
49 | __attribute__ ((weak)); | |
50 | ||
d1e44df1 RM |
51 | /* These are defined in libc. */ |
52 | extern int __libc_csu_init (int argc, char **argv, char **envp); | |
53 | extern void __libc_csu_fini (void); | |
54 | extern void __libc_start_main (int (*main) (int, char **, char **), | |
55 | int argc, char **argv, ElfW(auxv_t) *auxv, | |
56 | int (*init) (int, char **, char **), | |
57 | void (*fini) (void), | |
58 | void (*rtld_fini) (void), | |
59 | void *stack_end); | |
60 | ||
61 | void | |
62 | _start (uint32_t info[]) | |
63 | { | |
64 | /* The generic code actually assumes that envp follows argv. */ | |
65 | ||
f9719493 | 66 | __libc_start_main (&__nacl_main ?: &main, |
d1e44df1 RM |
67 | nacl_startup_argc (info), |
68 | nacl_startup_argv (info), | |
69 | nacl_startup_auxv (info), | |
70 | &__libc_csu_init, &__libc_csu_fini, | |
71 | nacl_startup_fini (info), | |
72 | __builtin_frame_address (0)); | |
73 | ||
74 | /* That should not return. Make sure we crash if it did. */ | |
75 | while (1) | |
76 | __builtin_trap (); | |
77 | } |