diff options
Diffstat (limited to 'sysdeps/nacl/start.c')
-rw-r--r-- | sysdeps/nacl/start.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/sysdeps/nacl/start.c b/sysdeps/nacl/start.c new file mode 100644 index 0000000..a4b6dd3 --- /dev/null +++ b/sysdeps/nacl/start.c @@ -0,0 +1,73 @@ +/* Entry-point for programs. NaCl version. + Copyright (C) 2015 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + In addition to the permissions in the GNU Lesser General Public + License, the Free Software Foundation gives you unlimited + permission to link the compiled version of this file with other + programs, and to distribute those programs without any restriction + coming from the use of this file. (The GNU Lesser General Public + License restrictions do apply in other respects; for example, they + cover modification of the file, and distribution when not linked + into another program.) + + Note that people who make modified versions of this file are not + obligated to grant this special exception for their modified + versions; it is their choice whether to do so. The GNU Lesser + General Public License gives permission to release a modified + version without this exception; this exception also makes it + possible to release a modified version which carries forward this + exception. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <stdint.h> +#include <link.h> + +/* NaCl's elf32.h is incompatible with the real <elf.h>. */ +#define NATIVE_CLIENT_SRC_INCLUDE_ELF32_H_ +#include <native_client/src/untrusted/nacl/nacl_startup.h> + + +/* The application defines this, of course. */ +extern int main (int argc, char **argv, char **envp); + +/* These are defined in libc. */ +extern int __libc_csu_init (int argc, char **argv, char **envp); +extern void __libc_csu_fini (void); +extern void __libc_start_main (int (*main) (int, char **, char **), + int argc, char **argv, ElfW(auxv_t) *auxv, + int (*init) (int, char **, char **), + void (*fini) (void), + void (*rtld_fini) (void), + void *stack_end); + +void +_start (uint32_t info[]) +{ + /* The generic code actually assumes that envp follows argv. */ + + __libc_start_main (&main, + nacl_startup_argc (info), + nacl_startup_argv (info), + nacl_startup_auxv (info), + &__libc_csu_init, &__libc_csu_fini, + nacl_startup_fini (info), + __builtin_frame_address (0)); + + /* That should not return. Make sure we crash if it did. */ + while (1) + __builtin_trap (); +} |