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/* Copyright (C) 1998,2000,2001,2002,2003 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stdlib.h>
#include <unistd.h>
#include <ldsodefs.h>
#include <bp-start.h>
#include <bp-sym.h>
extern int __cache_line_size;
weak_extern (__cache_line_size)
/* Scan the Aux Vector for the "Data Cache Block Size" entry. If found
verify that the static extern __cache_line_size is defined by checking
for not NULL. If it is defined then assign the cache block size
value to __cache_line_size. */
static inline void
__aux_init_cache (ElfW(auxv_t) *av)
{
for (; av->a_type != AT_NULL; ++av)
switch (av->a_type)
{
case AT_DCACHEBSIZE:
{
int *cls = & __cache_line_size;
if (cls != NULL)
*cls = av->a_un.a_val;
}
break;
}
}
/* This is used in sysdeps/generic/libc-start.c. */
#define AUX_VECTOR_INIT __aux_init_cache
/* The main work is done in the generic function. */
#define LIBC_START_MAIN generic_start_main
#define LIBC_START_MAIN_AUXVEC_ARG
#define MAIN_AUXVEC_ARG
#define INIT_MAIN_ARGS
#include <sysdeps/generic/libc-start.c>
struct startup_info
{
void *__unbounded sda_base;
int (*main) (int, char **, char **, void *);
int (*init) (int, char **, char **, void *);
void (*fini) (void);
};
int
/* GKM FIXME: GCC: this should get __BP_ prefix by virtue of the
BPs in the arglist of startup_info.main and startup_info.init. */
BP_SYM (__libc_start_main) (int argc, char *__unbounded *__unbounded ubp_av,
char *__unbounded *__unbounded ubp_ev,
ElfW(auxv_t) *__unbounded auxvec,
void (*rtld_fini) (void),
struct startup_info *__unbounded stinfo,
char *__unbounded *__unbounded stack_on_entry)
{
#if __BOUNDED_POINTERS__
char **argv;
#else
# define argv ubp_av
#endif
/* 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 *__unbounded *__unbounded temp;
/* ...in which case, we have argc as the top thing on the
stack, followed by argv (NULL-terminated), envp (likewise),
and the auxilary vector. */
/* 32/64-bit agnostic load from stack */
argc = *(long int *__unbounded) stack_on_entry;
ubp_av = stack_on_entry + 1;
ubp_ev = ubp_av + argc + 1;
#ifdef HAVE_AUX_VECTOR
temp = ubp_ev;
while (*temp != NULL)
++temp;
auxvec = (ElfW(auxv_t) *)++temp;
#endif
rtld_fini = NULL;
}
/* Initialize the __cache_line_size variable from the aux vector. */
__aux_init_cache (auxvec);
return generic_start_main (stinfo->main, argc, ubp_av, auxvec,
stinfo->init, stinfo->fini, rtld_fini,
stack_on_entry);
}
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