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135 lines
3.4 KiB
135 lines
3.4 KiB
/* PPC64 specific symbolic name handling.
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Copyright (C) 2004, 2005, 2014 Red Hat, Inc.
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This file is part of elfutils.
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Written by Ulrich Drepper <drepper@redhat.com>, 2004.
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This file is free software; you can redistribute it and/or modify
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it under the terms of either
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at
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your option) any later version
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at
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your option) any later version
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or both in parallel, as here.
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elfutils is distributed in the hope that it will be useful, but
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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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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see <http://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <assert.h>
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#include <elf.h>
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#include <stddef.h>
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#include <string.h>
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#define BACKEND ppc64_
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#include "libebl_CPU.h"
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/* Check for the simple reloc types. */
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Elf_Type
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ppc64_reloc_simple_type (Ebl *ebl __attribute__ ((unused)), int type,
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int *addsub __attribute__ ((unused)))
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{
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switch (type)
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{
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case R_PPC64_ADDR64:
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case R_PPC64_UADDR64:
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return ELF_T_XWORD;
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case R_PPC64_ADDR32:
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case R_PPC64_UADDR32:
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return ELF_T_WORD;
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case R_PPC64_UADDR16:
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return ELF_T_HALF;
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default:
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return ELF_T_NUM;
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}
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}
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const char *
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ppc64_dynamic_tag_name (int64_t tag, char *buf __attribute__ ((unused)),
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size_t len __attribute__ ((unused)))
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{
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switch (tag)
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{
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case DT_PPC64_GLINK:
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return "PPC64_GLINK";
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case DT_PPC64_OPD:
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return "PPC64_OPD";
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case DT_PPC64_OPDSZ:
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return "PPC64_OPDSZ";
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case DT_PPC64_OPT:
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return "PPC64_OPT";
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default:
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break;
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}
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return NULL;
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}
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bool
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ppc64_dynamic_tag_check (int64_t tag)
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{
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return (tag == DT_PPC64_GLINK
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|| tag == DT_PPC64_OPD
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|| tag == DT_PPC64_OPDSZ
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|| tag == DT_PPC64_OPT);
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}
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/* Check whether given symbol's st_value and st_size are OK despite failing
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normal checks. */
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bool
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ppc64_check_special_symbol (Elf *elf,
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const GElf_Sym *sym __attribute__ ((unused)),
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const char *name __attribute__ ((unused)),
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const GElf_Shdr *destshdr)
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{
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size_t shstrndx;
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if (elf_getshdrstrndx (elf, &shstrndx) != 0)
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return false;
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const char *sname = elf_strptr (elf, shstrndx, destshdr->sh_name);
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if (sname == NULL)
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return false;
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return strcmp (sname, ".opd") == 0;
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}
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/* Check if backend uses a bss PLT in this file. */
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bool
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ppc64_bss_plt_p (Elf *elf __attribute__ ((unused)))
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{
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return true;
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}
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/* Check whether machine flags are valid. PPC64 has three possible values:
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0 - for unspecified ABI, or not using any specific ABI features.
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1 - for the original ELF PPC64 ABI using function descriptors.
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2 - for the revised ELFv2 PPC64 ABI without function descriptors. */
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bool
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ppc64_machine_flag_check (GElf_Word flags)
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{
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return flags == 0 || flags == 1 || flags == 2;
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}
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bool
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ppc64_check_st_other_bits (unsigned char st_other)
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{
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return (PPC64_LOCAL_ENTRY_OFFSET (st_other) != 0);
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}
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