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/* Arm specific symbolic name handling.
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Copyright (C) 2002-2009, 2014, 2015, 2017 Red Hat, Inc.
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This file is part of elfutils.
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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 <elf.h>
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#include <stddef.h>
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#include <string.h>
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#define BACKEND arm_
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#include "libebl_CPU.h"
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const char *
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arm_segment_type_name (int segment, char *buf __attribute__ ((unused)),
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size_t len __attribute__ ((unused)))
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{
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switch (segment)
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{
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case PT_ARM_EXIDX:
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return "ARM_EXIDX";
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}
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return NULL;
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}
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/* Return symbolic representation of section type. */
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const char *
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arm_section_type_name (int type,
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char *buf __attribute__ ((unused)),
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size_t len __attribute__ ((unused)))
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{
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switch (type)
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{
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case SHT_ARM_EXIDX:
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return "ARM_EXIDX";
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case SHT_ARM_PREEMPTMAP:
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return "ARM_PREEMPTMAP";
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case SHT_ARM_ATTRIBUTES:
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return "ARM_ATTRIBUTES";
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}
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return NULL;
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}
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/* Check whether machine flags are valid. */
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bool
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arm_machine_flag_check (GElf_Word flags)
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{
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switch (flags & EF_ARM_EABIMASK)
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{
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case EF_ARM_EABI_UNKNOWN:
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case EF_ARM_EABI_VER1:
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case EF_ARM_EABI_VER2:
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case EF_ARM_EABI_VER3:
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case EF_ARM_EABI_VER4:
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case EF_ARM_EABI_VER5:
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break;
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default:
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return false;
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}
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return ((flags &~ (EF_ARM_EABIMASK
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| EF_ARM_RELEXEC
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| EF_ARM_HASENTRY
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| EF_ARM_INTERWORK
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| EF_ARM_APCS_26
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| EF_ARM_APCS_FLOAT
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| EF_ARM_PIC
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| EF_ARM_ALIGN8
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| EF_ARM_NEW_ABI
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| EF_ARM_OLD_ABI
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| EF_ARM_SOFT_FLOAT
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| EF_ARM_VFP_FLOAT
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| EF_ARM_MAVERICK_FLOAT
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| EF_ARM_SYMSARESORTED
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| EF_ARM_DYNSYMSUSESEGIDX
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| EF_ARM_MAPSYMSFIRST
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| EF_ARM_EABIMASK
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| EF_ARM_BE8
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| EF_ARM_LE8)) == 0);
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}
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/* Check for the simple reloc types. */
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Elf_Type
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arm_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_ARM_ABS32:
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return ELF_T_WORD;
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case R_ARM_ABS16:
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return ELF_T_HALF;
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case R_ARM_ABS8:
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return ELF_T_BYTE;
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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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/* The SHT_ARM_EXIDX section type is a valid target for relocation. */
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bool
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arm_check_reloc_target_type (Ebl *ebl __attribute__ ((unused)), Elf64_Word sh_type)
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{
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return sh_type == SHT_ARM_EXIDX;
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}
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const char *
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arm_symbol_type_name (int type,
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char *buf __attribute__ ((unused)),
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size_t len __attribute__ ((unused)))
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{
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switch (type)
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{
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case STT_ARM_TFUNC:
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return "ARM_TFUNC";
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}
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return NULL;
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}
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/* A data mapping symbol is a symbol with "$d" name or "$d.<any...>" name,
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* STT_NOTYPE, STB_LOCAL and st_size of zero. The indicate the stat of a
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* sequence of data items. */
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bool
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arm_data_marker_symbol (const GElf_Sym *sym, const char *sname)
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{
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return (sym != NULL && sname != NULL
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&& sym->st_size == 0 && GELF_ST_BIND (sym->st_info) == STB_LOCAL
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&& GELF_ST_TYPE (sym->st_info) == STT_NOTYPE
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&& (strcmp (sname, "$d") == 0 || strncmp (sname, "$d.", 3) == 0));
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}
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