| /* Copyright (C) 1998-2018 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/>. */ |
| |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <ldsodefs.h> |
| #include <sysdep.h> |
| |
| #ifndef SHARED |
| #include <hwcapinfo.h> |
| #endif |
| |
| int __cache_line_size attribute_hidden; |
| /* The main work is done in the generic function. */ |
| #define LIBC_START_MAIN generic_start_main |
| #define LIBC_START_DISABLE_INLINE |
| #define LIBC_START_MAIN_AUXVEC_ARG |
| #define MAIN_AUXVEC_ARG |
| #define INIT_MAIN_ARGS |
| #include <csu/libc-start.c> |
| |
| struct startup_info |
| { |
| void *sda_base; |
| int (*main) (int, char **, char **, void *); |
| int (*init) (int, char **, char **, void *); |
| void (*fini) (void); |
| }; |
| |
| int |
| __libc_start_main (int argc, char **argv, |
| char **ev, |
| ElfW (auxv_t) * auxvec, |
| void (*rtld_fini) (void), |
| struct startup_info *stinfo, |
| char **stack_on_entry) |
| { |
| /* the PPC SVR4 ABI says that the top thing on the stack will |
| be a NULL pointer, so if not we assume that we're being called |
| as a statically-linked program by Linux... */ |
| if (*stack_on_entry != NULL) |
| { |
| char **temp; |
| /* ...in which case, we have argc as the top thing on the |
| stack, followed by argv (NULL-terminated), envp (likewise), |
| and the auxiliary vector. */ |
| /* 32/64-bit agnostic load from stack */ |
| argc = *(long int *) stack_on_entry; |
| argv = stack_on_entry + 1; |
| ev = argv + argc + 1; |
| #ifdef HAVE_AUX_VECTOR |
| temp = ev; |
| while (*temp != NULL) |
| ++temp; |
| auxvec = (ElfW (auxv_t) *)++ temp; |
| #endif |
| rtld_fini = NULL; |
| } |
| |
| /* Initialize the __cache_line_size variable from the aux vector. For the |
| static case, we also need _dl_hwcap, _dl_hwcap2 and _dl_platform, so we |
| can call __tcb_parse_hwcap_and_convert_at_platform (). */ |
| for (ElfW (auxv_t) * av = auxvec; av->a_type != AT_NULL; ++av) |
| switch (av->a_type) |
| { |
| case AT_DCACHEBSIZE: |
| __cache_line_size = av->a_un.a_val; |
| break; |
| #ifndef SHARED |
| case AT_HWCAP: |
| _dl_hwcap = (unsigned long int) av->a_un.a_val; |
| break; |
| case AT_HWCAP2: |
| _dl_hwcap2 = (unsigned long int) av->a_un.a_val; |
| break; |
| case AT_PLATFORM: |
| _dl_platform = (void *) av->a_un.a_val; |
| break; |
| #endif |
| } |
| |
| /* Initialize hwcap/hwcap2 and platform data so it can be copied to |
| the TCB later in __libc_setup_tls (). (static case only). */ |
| #ifndef SHARED |
| __tcb_parse_hwcap_and_convert_at_platform (); |
| #endif |
| |
| return generic_start_main (stinfo->main, argc, argv, auxvec, |
| stinfo->init, stinfo->fini, rtld_fini, |
| stack_on_entry); |
| } |