mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-26 12:41:05 +00:00
113 lines
3.6 KiB
C
113 lines
3.6 KiB
C
/* Operating system support for run-time dynamic linker. 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.
|
|
|
|
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/>. */
|
|
|
|
#ifdef SHARED
|
|
|
|
# include <assert.h>
|
|
# include <ldsodefs.h>
|
|
# include <stdint.h>
|
|
# include <nacl-interfaces.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 RTLD_START code sets up the pointer that gets to these
|
|
macros as COOKIE to point to two words:
|
|
[0] the argument to the entry point from the system (see nacl_startup.h)
|
|
[1] the stack base
|
|
*/
|
|
|
|
# define DL_FIND_ARG_COMPONENTS(cookie, argc, argv, envp, auxp) \
|
|
do { \
|
|
uint32_t *_info = ((void **) (cookie))[0]; \
|
|
(argc) = nacl_startup_argc (_info); \
|
|
(argv) = nacl_startup_argv (_info); \
|
|
(envp) = nacl_startup_envp (_info); \
|
|
(auxp) = nacl_startup_auxv (_info); \
|
|
} while (0)
|
|
|
|
# define DL_STACK_END(cookie) (((void **) (cookie))[1])
|
|
|
|
/* This is called from the entry point (_start), defined by the RTLD_START
|
|
macro in the machine-specific dl-machine.h file. At this point, dynamic
|
|
linking has been completed and the first argument is the application's
|
|
entry point. */
|
|
attribute_hidden internal_function __attribute__ ((noreturn))
|
|
void
|
|
_dl_start_user (void (*user_entry) (uint32_t info[]), uint32_t info[])
|
|
{
|
|
if (_dl_skip_args > 0)
|
|
{
|
|
/* There are some arguments that the user program should not see.
|
|
Just slide up the INFO pointer so its NACL_STARTUP_ARGV points
|
|
to what should now be argv[0], and copy back the earlier fields. */
|
|
assert (nacl_startup_argc (info) >= _dl_skip_args);
|
|
assert (NACL_STARTUP_ARGV == 3);
|
|
uint32_t envc = info[NACL_STARTUP_ENVC];
|
|
uint32_t argc = info[NACL_STARTUP_ARGC];
|
|
info += _dl_skip_args;
|
|
info[NACL_STARTUP_ENVC] = envc;
|
|
info[NACL_STARTUP_ARGC] = argc - _dl_skip_args;
|
|
}
|
|
|
|
/* Pass our finalizer function to the user. */
|
|
info[NACL_STARTUP_FINI] = (uintptr_t) &_dl_fini;
|
|
|
|
/* Run initializers. */
|
|
_dl_init (GL(dl_ns)[0]._ns_loaded,
|
|
nacl_startup_argc (info),
|
|
nacl_startup_argv (info),
|
|
nacl_startup_envp (info));
|
|
|
|
/* Call the user's entry point. This should never return. */
|
|
(*user_entry) (info);
|
|
|
|
/* Fail clearly just in case it did return. */
|
|
__builtin_trap ();
|
|
}
|
|
|
|
# define DL_SYSDEP_INIT __nacl_initialize_interfaces ()
|
|
|
|
#endif /* SHARED */
|
|
|
|
#include <elf/dl-sysdep.c>
|
|
|
|
#include <dl-sysdep-open.h>
|
|
#include <nacl-interfaces.h>
|
|
#include <assert.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
char *
|
|
internal_function
|
|
_dl_sysdep_open_object (const char *name, size_t namelen, int *fd)
|
|
{
|
|
int error = __nacl_irt_resource_open.open_resource (name, fd);
|
|
if (error)
|
|
return NULL;
|
|
assert (*fd != -1);
|
|
char *realname = __strdup (name);
|
|
if (__glibc_unlikely (realname == NULL))
|
|
{
|
|
__close (*fd);
|
|
*fd = -1;
|
|
}
|
|
return realname;
|
|
}
|