mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-06 05:10:05 +00:00
b8a5737a49
* sysdeps/powerpc/elf/libc-start.c (__cache_line_size): Declare. (__aux_init_cache): New. (__libc_start_main): Change type of `auxvec' parameter to `ElfW(auxv_t) *'. Correct walking of aux vector. Call __aux_init_cache. * sysdeps/unix/sysv/linux/powerpc/dl-sysdep.c (__cache_line_size): Declare. (__aux_init_cache): New. (DL_PLATFORM_INIT): Define. * sysdeps/powerpc/memset.S: Define __cache_line_size and use its value to select the correct stride for dcbz. 2002-08-22 Steven Munroe <sjmunroe@us.ibm.com> * sysdeps/powerpc/elf/libc-start.c (__cache_line_size): Declare. (__aux_init_cache): New. (__libc_start_main): Change type of `auxvec' parameter to `ElfW(auxv_t) *'. Correct walking of aux vector. Call __aux_init_cache. * sysdeps/unix/sysv/linux/powerpc/dl-sysdep.c (__cache_line_size): Declare. (__aux_init_cache): New. (DL_PLATFORM_INIT): Define. * sysdeps/powerpc/memset.S: Define __cache_line_size and use its value to select the correct stride for dcbz.
82 lines
2.9 KiB
C
82 lines
2.9 KiB
C
/* Operating system support for run-time dynamic linker. Linux/PPC version.
|
|
Copyright (C) 1997, 1998, 2001 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 "config.h"
|
|
#include "kernel-features.h"
|
|
#include <ldsodefs.h>
|
|
|
|
extern int __cache_line_size;
|
|
weak_extern (__cache_line_size)
|
|
|
|
#define DL_PLATFORM_INIT __aux_init_cache(_dl_auxv)
|
|
|
|
/* 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;
|
|
}
|
|
}
|
|
|
|
#ifndef __ASSUME_STD_AUXV
|
|
|
|
/* The PowerPC's auxiliary argument block gets aligned to a 16-byte
|
|
boundary. This is history and impossible to change compatibly. */
|
|
|
|
#define DL_FIND_ARG_COMPONENTS(cookie, argc, argv, envp, auxp) \
|
|
do { \
|
|
char **_tmp; \
|
|
size_t _test; \
|
|
(argc) = *(long int *) cookie; \
|
|
(argv) = (char **) cookie + 1; \
|
|
(envp) = (argv) + (argc) + 1; \
|
|
for (_tmp = (envp); *_tmp; ++_tmp) \
|
|
continue; \
|
|
/* The following '++' is important! */ \
|
|
++_tmp; \
|
|
\
|
|
_test = (size_t)_tmp; \
|
|
_test = (_test + 0xf) & ~0xf; \
|
|
/* Under some circumstances, MkLinux (up to at least DR3a5) \
|
|
omits the padding. To work around this, we make a \
|
|
basic sanity check of the argument vector. Of \
|
|
course, this means that in future, the argument \
|
|
vector will have to be laid out to allow for this \
|
|
test :-(. */ \
|
|
if (((ElfW(auxv_t) *)_test)->a_type <= 0x10) \
|
|
_tmp = (char **)_test; \
|
|
(auxp) = (ElfW(auxv_t) *) _tmp; \
|
|
} while (0)
|
|
#endif
|
|
|
|
#include <sysdeps/unix/sysv/linux/dl-sysdep.c>
|