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Diffstat (limited to 'sysdeps/powerpc/elf/libc-start.c')
| -rw-r--r-- | sysdeps/powerpc/elf/libc-start.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/sysdeps/powerpc/elf/libc-start.c b/sysdeps/powerpc/elf/libc-start.c new file mode 100644 index 0000000000..eed3e06c8a --- /dev/null +++ b/sysdeps/powerpc/elf/libc-start.c @@ -0,0 +1,100 @@ +/* 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 +#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. */ + 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); +} |