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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.
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Copyright (C) 1997, 1998, 2001 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include "config.h"
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#include "kernel-features.h"
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#include <ldsodefs.h>
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extern int __cache_line_size;
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weak_extern (__cache_line_size)
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#define DL_PLATFORM_INIT __aux_init_cache(_dl_auxv)
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/* Scan the Aux Vector for the "Data Cache Block Size" entry. If found
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verify that the static extern __cache_line_size is defined by checking
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for not NULL. If it is defined then assign the cache block size
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value to __cache_line_size. */
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static inline void
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__aux_init_cache (ElfW(auxv_t) *av)
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{
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for (; av->a_type != AT_NULL; ++av)
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switch (av->a_type)
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{
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case AT_DCACHEBSIZE:
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{
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int *cls = & __cache_line_size;
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if (cls != NULL)
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*cls = av->a_un.a_val;
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}
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break;
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}
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}
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#ifndef __ASSUME_STD_AUXV
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/* The PowerPC's auxiliary argument block gets aligned to a 16-byte
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boundary. This is history and impossible to change compatibly. */
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#define DL_FIND_ARG_COMPONENTS(cookie, argc, argv, envp, auxp) \
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do { \
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char **_tmp; \
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size_t _test; \
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(argc) = *(long int *) cookie; \
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(argv) = (char **) cookie + 1; \
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(envp) = (argv) + (argc) + 1; \
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for (_tmp = (envp); *_tmp; ++_tmp) \
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continue; \
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/* The following '++' is important! */ \
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++_tmp; \
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\
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_test = (size_t)_tmp; \
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_test = (_test + 0xf) & ~0xf; \
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/* Under some circumstances, MkLinux (up to at least DR3a5) \
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omits the padding. To work around this, we make a \
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basic sanity check of the argument vector. Of \
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course, this means that in future, the argument \
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vector will have to be laid out to allow for this \
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test :-(. */ \
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if (((ElfW(auxv_t) *)_test)->a_type <= 0x10) \
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_tmp = (char **)_test; \
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(auxp) = (ElfW(auxv_t) *) _tmp; \
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} while (0)
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#endif
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#include <sysdeps/unix/sysv/linux/dl-sysdep.c>
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