| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Entry-point for programs. NaCl version. |
| 2 | Copyright (C) 2015-2016 Free Software Foundation, Inc. |
| 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 | |
| 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 | |
| 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 | |
| 66 | __libc_start_main (&__nacl_main ?: &main, |
| 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 | } |