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efbbd9c33a
Store ISA level in the portion of the unused upper 32 bits of the hwcaps field in cache and the unused pad field in aux cache. ISA level is stored and checked only for shared objects in glibc-hwcaps subdirectories. The shared objects in the default directories aren't checked since there are no fallbacks for these shared objects. Tested on x86-64-v2, x86-64-v3 and x86-64-v4 machines with --disable-hardcoded-path-in-tests and --enable-hardcoded-path-in-tests.
94 lines
3.0 KiB
C
94 lines
3.0 KiB
C
/* Copyright (C) 1999-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Alexandre Oliva <aoliva@redhat.com>
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Based on work ../x86_64/readelflib.c,
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contributed by Andreas Jaeger <aj@suse.de>, 1999 and
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Jakub Jelinek <jakub@redhat.com>, 1999.
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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, see
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<https://www.gnu.org/licenses/>. */
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int process_elf32_file (const char *file_name, const char *lib,
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int *flag, unsigned int *osversion,
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unsigned int *isa_level, char **soname,
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void *file_contents, size_t file_length);
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int process_elf64_file (const char *file_name, const char *lib,
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int *flag, unsigned int *osversion,
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unsigned int *isa_level, char **soname,
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void *file_contents, size_t file_length);
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/* Returns 0 if everything is ok, != 0 in case of error. */
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int
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process_elf_file (const char *file_name, const char *lib, int *flag,
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unsigned int *osversion, unsigned int *isa_level,
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char **soname, void *file_contents, size_t file_length)
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{
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union
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{
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Elf64_Ehdr *eh64;
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Elf32_Ehdr *eh32;
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ElfW(Ehdr) *eh;
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}
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elf_header;
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int ret;
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elf_header.eh = file_contents;
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if (elf_header.eh->e_ident [EI_CLASS] == ELFCLASS32)
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{
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ret = process_elf32_file (file_name, lib, flag, osversion, isa_level,
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soname, file_contents, file_length);
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if (!ret)
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{
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Elf32_Word flags = elf_header.eh32->e_flags;
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int nan2008 = (flags & EF_MIPS_NAN2008) != 0;
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/* n32 libraries are always libc.so.6+, o32 only if 2008 NaN. */
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if ((flags & EF_MIPS_ABI2) != 0)
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*flag = (nan2008 ? FLAG_MIPS64_LIBN32_NAN2008
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: FLAG_MIPS64_LIBN32) | FLAG_ELF_LIBC6;
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else if (nan2008)
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*flag = FLAG_MIPS_LIB32_NAN2008 | FLAG_ELF_LIBC6;
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}
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}
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else
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{
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ret = process_elf64_file (file_name, lib, flag, osversion, isa_level,
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soname, file_contents, file_length);
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/* n64 libraries are always libc.so.6+. */
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if (!ret)
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{
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Elf64_Word flags = elf_header.eh64->e_flags;
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int nan2008 = (flags & EF_MIPS_NAN2008) != 0;
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*flag = (nan2008 ? FLAG_MIPS64_LIBN64_NAN2008
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: FLAG_MIPS64_LIBN64) | FLAG_ELF_LIBC6;
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}
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}
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return ret;
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}
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#undef __ELF_NATIVE_CLASS
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#undef process_elf_file
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#define process_elf_file process_elf32_file
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#define __ELF_NATIVE_CLASS 32
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#include "elf/readelflib.c"
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#undef __ELF_NATIVE_CLASS
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#undef process_elf_file
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#define process_elf_file process_elf64_file
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#define __ELF_NATIVE_CLASS 64
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#include "elf/readelflib.c"
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