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/* Copyright (C) 1998-2020 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
<https://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);
}
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