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glibc/sysdeps/powerpc/elf/libc-start.c
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/* Copyright (C) 1998,2000,2001,2002,2003,2004 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) | |
/* 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 | |
#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. */ | |
for (ElfW(auxv_t) *av = auxvec; 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; | |
} | |
return generic_start_main (stinfo->main, argc, ubp_av, auxvec, | |
stinfo->init, stinfo->fini, rtld_fini, | |
stack_on_entry); | |
} |