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