125b3c049e70834cf33790a28643ab058b507b35cBen Cheng/* Return section header. 203333823c75a1c1887e923828113a1b0fd12020cElliott Hughes Copyright (C) 1998-2002, 2005, 2007, 2009, 2012, 2014 Red Hat, Inc. 303333823c75a1c1887e923828113a1b0fd12020cElliott Hughes This file is part of elfutils. 425b3c049e70834cf33790a28643ab058b507b35cBen Cheng Written by Ulrich Drepper <drepper@redhat.com>, 1998. 525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 603333823c75a1c1887e923828113a1b0fd12020cElliott Hughes This file is free software; you can redistribute it and/or modify 703333823c75a1c1887e923828113a1b0fd12020cElliott Hughes it under the terms of either 825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 903333823c75a1c1887e923828113a1b0fd12020cElliott Hughes * the GNU Lesser General Public License as published by the Free 1003333823c75a1c1887e923828113a1b0fd12020cElliott Hughes Software Foundation; either version 3 of the License, or (at 1103333823c75a1c1887e923828113a1b0fd12020cElliott Hughes your option) any later version 1203333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 1303333823c75a1c1887e923828113a1b0fd12020cElliott Hughes or 1403333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 1503333823c75a1c1887e923828113a1b0fd12020cElliott Hughes * the GNU General Public License as published by the Free 1603333823c75a1c1887e923828113a1b0fd12020cElliott Hughes Software Foundation; either version 2 of the License, or (at 1703333823c75a1c1887e923828113a1b0fd12020cElliott Hughes your option) any later version 1803333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 1903333823c75a1c1887e923828113a1b0fd12020cElliott Hughes or both in parallel, as here. 2003333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 2103333823c75a1c1887e923828113a1b0fd12020cElliott Hughes elfutils is distributed in the hope that it will be useful, but 2225b3c049e70834cf33790a28643ab058b507b35cBen Cheng WITHOUT ANY WARRANTY; without even the implied warranty of 2325b3c049e70834cf33790a28643ab058b507b35cBen Cheng MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 2425b3c049e70834cf33790a28643ab058b507b35cBen Cheng General Public License for more details. 2525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 2603333823c75a1c1887e923828113a1b0fd12020cElliott Hughes You should have received copies of the GNU General Public License and 2703333823c75a1c1887e923828113a1b0fd12020cElliott Hughes the GNU Lesser General Public License along with this program. If 2803333823c75a1c1887e923828113a1b0fd12020cElliott Hughes not, see <http://www.gnu.org/licenses/>. */ 2925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 3025b3c049e70834cf33790a28643ab058b507b35cBen Cheng#ifdef HAVE_CONFIG_H 3125b3c049e70834cf33790a28643ab058b507b35cBen Cheng# include <config.h> 3225b3c049e70834cf33790a28643ab058b507b35cBen Cheng#endif 3325b3c049e70834cf33790a28643ab058b507b35cBen Cheng 3425b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include <assert.h> 3525b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include <errno.h> 3625b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include <stdbool.h> 3725b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include <unistd.h> 3825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 3925b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include <system.h> 4025b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include "libelfP.h" 4125b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include "common.h" 4225b3c049e70834cf33790a28643ab058b507b35cBen Cheng 4325b3c049e70834cf33790a28643ab058b507b35cBen Cheng#ifndef LIBELFBITS 4425b3c049e70834cf33790a28643ab058b507b35cBen Cheng# define LIBELFBITS 32 4525b3c049e70834cf33790a28643ab058b507b35cBen Cheng#endif 4625b3c049e70834cf33790a28643ab058b507b35cBen Cheng 4725b3c049e70834cf33790a28643ab058b507b35cBen Cheng 4825b3c049e70834cf33790a28643ab058b507b35cBen Chengstatic ElfW2(LIBELFBITS,Shdr) * 4925b3c049e70834cf33790a28643ab058b507b35cBen Chengload_shdr_wrlock (Elf_Scn *scn) 5025b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 5125b3c049e70834cf33790a28643ab058b507b35cBen Cheng ElfW2(LIBELFBITS,Shdr) *result; 5225b3c049e70834cf33790a28643ab058b507b35cBen Cheng 5325b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Read the section header table. */ 5425b3c049e70834cf33790a28643ab058b507b35cBen Cheng Elf *elf = scn->elf; 5525b3c049e70834cf33790a28643ab058b507b35cBen Cheng ElfW2(LIBELFBITS,Ehdr) *ehdr = elf->state.ELFW(elf,LIBELFBITS).ehdr; 5625b3c049e70834cf33790a28643ab058b507b35cBen Cheng 5725b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Try again, maybe the data is there now. */ 5825b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = scn->shdr.ELFW(e,LIBELFBITS); 5925b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (result != NULL) 6025b3c049e70834cf33790a28643ab058b507b35cBen Cheng goto out; 6125b3c049e70834cf33790a28643ab058b507b35cBen Cheng 6225b3c049e70834cf33790a28643ab058b507b35cBen Cheng size_t shnum; 6303333823c75a1c1887e923828113a1b0fd12020cElliott Hughes if (__elf_getshdrnum_rdlock (elf, &shnum) != 0 6403333823c75a1c1887e923828113a1b0fd12020cElliott Hughes || shnum > SIZE_MAX / sizeof (ElfW2(LIBELFBITS,Shdr))) 6525b3c049e70834cf33790a28643ab058b507b35cBen Cheng goto out; 6625b3c049e70834cf33790a28643ab058b507b35cBen Cheng size_t size = shnum * sizeof (ElfW2(LIBELFBITS,Shdr)); 6725b3c049e70834cf33790a28643ab058b507b35cBen Cheng 6825b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Allocate memory for the section headers. We know the number 6925b3c049e70834cf33790a28643ab058b507b35cBen Cheng of entries from the ELF header. */ 7025b3c049e70834cf33790a28643ab058b507b35cBen Cheng ElfW2(LIBELFBITS,Shdr) *shdr = elf->state.ELFW(elf,LIBELFBITS).shdr = 7125b3c049e70834cf33790a28643ab058b507b35cBen Cheng (ElfW2(LIBELFBITS,Shdr) *) malloc (size); 7225b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (elf->state.ELFW(elf,LIBELFBITS).shdr == NULL) 7325b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 7425b3c049e70834cf33790a28643ab058b507b35cBen Cheng __libelf_seterrno (ELF_E_NOMEM); 7525b3c049e70834cf33790a28643ab058b507b35cBen Cheng goto out; 7625b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 7725b3c049e70834cf33790a28643ab058b507b35cBen Cheng elf->state.ELFW(elf,LIBELFBITS).shdr_malloced = 1; 7825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 7925b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (elf->map_address != NULL) 8025b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 8103333823c75a1c1887e923828113a1b0fd12020cElliott Hughes /* First see whether the information in the ELF header is 8203333823c75a1c1887e923828113a1b0fd12020cElliott Hughes valid and it does not ask for too much. */ 8303333823c75a1c1887e923828113a1b0fd12020cElliott Hughes if (unlikely (ehdr->e_shoff >= elf->maximum_size) 8403333823c75a1c1887e923828113a1b0fd12020cElliott Hughes || unlikely (elf->maximum_size - ehdr->e_shoff < size)) 8503333823c75a1c1887e923828113a1b0fd12020cElliott Hughes { 8603333823c75a1c1887e923828113a1b0fd12020cElliott Hughes /* Something is wrong. */ 8703333823c75a1c1887e923828113a1b0fd12020cElliott Hughes __libelf_seterrno (ELF_E_INVALID_SECTION_HEADER); 8803333823c75a1c1887e923828113a1b0fd12020cElliott Hughes goto free_and_out; 8903333823c75a1c1887e923828113a1b0fd12020cElliott Hughes } 9003333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 9125b3c049e70834cf33790a28643ab058b507b35cBen Cheng ElfW2(LIBELFBITS,Shdr) *notcvt; 9225b3c049e70834cf33790a28643ab058b507b35cBen Cheng 9325b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* All the data is already mapped. If we could use it 9403333823c75a1c1887e923828113a1b0fd12020cElliott Hughes directly this would already have happened. Unless 9503333823c75a1c1887e923828113a1b0fd12020cElliott Hughes we allocated the memory ourselves and the ELF_F_MALLOCED 9603333823c75a1c1887e923828113a1b0fd12020cElliott Hughes flag is set. */ 9725b3c049e70834cf33790a28643ab058b507b35cBen Cheng void *file_shdr = ((char *) elf->map_address 9825b3c049e70834cf33790a28643ab058b507b35cBen Cheng + elf->start_offset + ehdr->e_shoff); 9925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 10003333823c75a1c1887e923828113a1b0fd12020cElliott Hughes assert ((elf->flags & ELF_F_MALLOCED) 10103333823c75a1c1887e923828113a1b0fd12020cElliott Hughes || ehdr->e_ident[EI_DATA] != MY_ELFDATA 10225b3c049e70834cf33790a28643ab058b507b35cBen Cheng || (! ALLOW_UNALIGNED 10325b3c049e70834cf33790a28643ab058b507b35cBen Cheng && ((uintptr_t) file_shdr 10425b3c049e70834cf33790a28643ab058b507b35cBen Cheng & (__alignof__ (ElfW2(LIBELFBITS,Shdr)) - 1)) != 0)); 10525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 10625b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Now copy the data and at the same time convert the byte order. */ 10725b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (ehdr->e_ident[EI_DATA] == MY_ELFDATA) 10825b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 10903333823c75a1c1887e923828113a1b0fd12020cElliott Hughes assert ((elf->flags & ELF_F_MALLOCED) || ! ALLOW_UNALIGNED); 11025b3c049e70834cf33790a28643ab058b507b35cBen Cheng memcpy (shdr, file_shdr, size); 11125b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 11225b3c049e70834cf33790a28643ab058b507b35cBen Cheng else 11325b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 11425b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (ALLOW_UNALIGNED 11525b3c049e70834cf33790a28643ab058b507b35cBen Cheng || ((uintptr_t) file_shdr 11625b3c049e70834cf33790a28643ab058b507b35cBen Cheng & (__alignof__ (ElfW2(LIBELFBITS,Shdr)) - 1)) == 0) 11725b3c049e70834cf33790a28643ab058b507b35cBen Cheng notcvt = (ElfW2(LIBELFBITS,Shdr) *) 11825b3c049e70834cf33790a28643ab058b507b35cBen Cheng ((char *) elf->map_address 11925b3c049e70834cf33790a28643ab058b507b35cBen Cheng + elf->start_offset + ehdr->e_shoff); 12025b3c049e70834cf33790a28643ab058b507b35cBen Cheng else 12125b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 12225b3c049e70834cf33790a28643ab058b507b35cBen Cheng notcvt = (ElfW2(LIBELFBITS,Shdr) *) alloca (size); 12325b3c049e70834cf33790a28643ab058b507b35cBen Cheng memcpy (notcvt, ((char *) elf->map_address 12425b3c049e70834cf33790a28643ab058b507b35cBen Cheng + elf->start_offset + ehdr->e_shoff), 12525b3c049e70834cf33790a28643ab058b507b35cBen Cheng size); 12625b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 12725b3c049e70834cf33790a28643ab058b507b35cBen Cheng 12825b3c049e70834cf33790a28643ab058b507b35cBen Cheng for (size_t cnt = 0; cnt < shnum; ++cnt) 12925b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 13025b3c049e70834cf33790a28643ab058b507b35cBen Cheng CONVERT_TO (shdr[cnt].sh_name, notcvt[cnt].sh_name); 13125b3c049e70834cf33790a28643ab058b507b35cBen Cheng CONVERT_TO (shdr[cnt].sh_type, notcvt[cnt].sh_type); 13225b3c049e70834cf33790a28643ab058b507b35cBen Cheng CONVERT_TO (shdr[cnt].sh_flags, notcvt[cnt].sh_flags); 13325b3c049e70834cf33790a28643ab058b507b35cBen Cheng CONVERT_TO (shdr[cnt].sh_addr, notcvt[cnt].sh_addr); 13425b3c049e70834cf33790a28643ab058b507b35cBen Cheng CONVERT_TO (shdr[cnt].sh_offset, notcvt[cnt].sh_offset); 13525b3c049e70834cf33790a28643ab058b507b35cBen Cheng CONVERT_TO (shdr[cnt].sh_size, notcvt[cnt].sh_size); 13625b3c049e70834cf33790a28643ab058b507b35cBen Cheng CONVERT_TO (shdr[cnt].sh_link, notcvt[cnt].sh_link); 13725b3c049e70834cf33790a28643ab058b507b35cBen Cheng CONVERT_TO (shdr[cnt].sh_info, notcvt[cnt].sh_info); 13825b3c049e70834cf33790a28643ab058b507b35cBen Cheng CONVERT_TO (shdr[cnt].sh_addralign, 13925b3c049e70834cf33790a28643ab058b507b35cBen Cheng notcvt[cnt].sh_addralign); 14025b3c049e70834cf33790a28643ab058b507b35cBen Cheng CONVERT_TO (shdr[cnt].sh_entsize, notcvt[cnt].sh_entsize); 14125b3c049e70834cf33790a28643ab058b507b35cBen Cheng 14225b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* If this is a section with an extended index add a 14325b3c049e70834cf33790a28643ab058b507b35cBen Cheng reference in the section which uses the extended 14425b3c049e70834cf33790a28643ab058b507b35cBen Cheng index. */ 14525b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (shdr[cnt].sh_type == SHT_SYMTAB_SHNDX 14625b3c049e70834cf33790a28643ab058b507b35cBen Cheng && shdr[cnt].sh_link < shnum) 14725b3c049e70834cf33790a28643ab058b507b35cBen Cheng elf->state.ELFW(elf,LIBELFBITS).scns.data[shdr[cnt].sh_link].shndx_index 14825b3c049e70834cf33790a28643ab058b507b35cBen Cheng = cnt; 14925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 15025b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Set the own shndx_index field in case it has not yet 15125b3c049e70834cf33790a28643ab058b507b35cBen Cheng been set. */ 15225b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (elf->state.ELFW(elf,LIBELFBITS).scns.data[cnt].shndx_index == 0) 15325b3c049e70834cf33790a28643ab058b507b35cBen Cheng elf->state.ELFW(elf,LIBELFBITS).scns.data[cnt].shndx_index 15425b3c049e70834cf33790a28643ab058b507b35cBen Cheng = -1; 15525b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 15625b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 15725b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 15825b3c049e70834cf33790a28643ab058b507b35cBen Cheng else if (likely (elf->fildes != -1)) 15925b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 16025b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Read the header. */ 16125b3c049e70834cf33790a28643ab058b507b35cBen Cheng ssize_t n = pread_retry (elf->fildes, 16225b3c049e70834cf33790a28643ab058b507b35cBen Cheng elf->state.ELFW(elf,LIBELFBITS).shdr, size, 16325b3c049e70834cf33790a28643ab058b507b35cBen Cheng elf->start_offset + ehdr->e_shoff); 16425b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (unlikely ((size_t) n != size)) 16525b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 16625b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Severe problems. We cannot read the data. */ 16725b3c049e70834cf33790a28643ab058b507b35cBen Cheng __libelf_seterrno (ELF_E_READ_ERROR); 16825b3c049e70834cf33790a28643ab058b507b35cBen Cheng goto free_and_out; 16925b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 17025b3c049e70834cf33790a28643ab058b507b35cBen Cheng 17125b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* If the byte order of the file is not the same as the one 17225b3c049e70834cf33790a28643ab058b507b35cBen Cheng of the host convert the data now. */ 17325b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (ehdr->e_ident[EI_DATA] != MY_ELFDATA) 17425b3c049e70834cf33790a28643ab058b507b35cBen Cheng for (size_t cnt = 0; cnt < shnum; ++cnt) 17525b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 17625b3c049e70834cf33790a28643ab058b507b35cBen Cheng CONVERT (shdr[cnt].sh_name); 17725b3c049e70834cf33790a28643ab058b507b35cBen Cheng CONVERT (shdr[cnt].sh_type); 17825b3c049e70834cf33790a28643ab058b507b35cBen Cheng CONVERT (shdr[cnt].sh_flags); 17925b3c049e70834cf33790a28643ab058b507b35cBen Cheng CONVERT (shdr[cnt].sh_addr); 18025b3c049e70834cf33790a28643ab058b507b35cBen Cheng CONVERT (shdr[cnt].sh_offset); 18125b3c049e70834cf33790a28643ab058b507b35cBen Cheng CONVERT (shdr[cnt].sh_size); 18225b3c049e70834cf33790a28643ab058b507b35cBen Cheng CONVERT (shdr[cnt].sh_link); 18325b3c049e70834cf33790a28643ab058b507b35cBen Cheng CONVERT (shdr[cnt].sh_info); 18425b3c049e70834cf33790a28643ab058b507b35cBen Cheng CONVERT (shdr[cnt].sh_addralign); 18525b3c049e70834cf33790a28643ab058b507b35cBen Cheng CONVERT (shdr[cnt].sh_entsize); 18625b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 18725b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 18825b3c049e70834cf33790a28643ab058b507b35cBen Cheng else 18925b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 19025b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* The file descriptor was already enabled and not all data was 19125b3c049e70834cf33790a28643ab058b507b35cBen Cheng read. Undo the allocation. */ 19225b3c049e70834cf33790a28643ab058b507b35cBen Cheng __libelf_seterrno (ELF_E_FD_DISABLED); 19325b3c049e70834cf33790a28643ab058b507b35cBen Cheng 19425b3c049e70834cf33790a28643ab058b507b35cBen Cheng free_and_out: 19525b3c049e70834cf33790a28643ab058b507b35cBen Cheng free (shdr); 19625b3c049e70834cf33790a28643ab058b507b35cBen Cheng elf->state.ELFW(elf,LIBELFBITS).shdr = NULL; 19725b3c049e70834cf33790a28643ab058b507b35cBen Cheng elf->state.ELFW(elf,LIBELFBITS).shdr_malloced = 0; 19825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 19925b3c049e70834cf33790a28643ab058b507b35cBen Cheng goto out; 20025b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 20125b3c049e70834cf33790a28643ab058b507b35cBen Cheng 20225b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Set the pointers in the `scn's. */ 20325b3c049e70834cf33790a28643ab058b507b35cBen Cheng for (size_t cnt = 0; cnt < shnum; ++cnt) 20425b3c049e70834cf33790a28643ab058b507b35cBen Cheng elf->state.ELFW(elf,LIBELFBITS).scns.data[cnt].shdr.ELFW(e,LIBELFBITS) 20525b3c049e70834cf33790a28643ab058b507b35cBen Cheng = &elf->state.ELFW(elf,LIBELFBITS).shdr[cnt]; 20625b3c049e70834cf33790a28643ab058b507b35cBen Cheng 20725b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = scn->shdr.ELFW(e,LIBELFBITS); 20825b3c049e70834cf33790a28643ab058b507b35cBen Cheng assert (result != NULL); 20925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 21025b3c049e70834cf33790a28643ab058b507b35cBen Chengout: 21125b3c049e70834cf33790a28643ab058b507b35cBen Cheng return result; 21225b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 21325b3c049e70834cf33790a28643ab058b507b35cBen Cheng 21425b3c049e70834cf33790a28643ab058b507b35cBen Chengstatic bool 21525b3c049e70834cf33790a28643ab058b507b35cBen Chengscn_valid (Elf_Scn *scn) 21625b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 21725b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (scn == NULL) 21825b3c049e70834cf33790a28643ab058b507b35cBen Cheng return false; 21925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 22025b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (unlikely (scn->elf->state.elf.ehdr == NULL)) 22125b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 22225b3c049e70834cf33790a28643ab058b507b35cBen Cheng __libelf_seterrno (ELF_E_WRONG_ORDER_EHDR); 22325b3c049e70834cf33790a28643ab058b507b35cBen Cheng return false; 22425b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 22525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 22625b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (unlikely (scn->elf->class != ELFW(ELFCLASS,LIBELFBITS))) 22725b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 22825b3c049e70834cf33790a28643ab058b507b35cBen Cheng __libelf_seterrno (ELF_E_INVALID_CLASS); 22925b3c049e70834cf33790a28643ab058b507b35cBen Cheng return false; 23025b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 23125b3c049e70834cf33790a28643ab058b507b35cBen Cheng 23225b3c049e70834cf33790a28643ab058b507b35cBen Cheng return true; 23325b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 23425b3c049e70834cf33790a28643ab058b507b35cBen Cheng 23525b3c049e70834cf33790a28643ab058b507b35cBen ChengElfW2(LIBELFBITS,Shdr) * 23625b3c049e70834cf33790a28643ab058b507b35cBen Cheng__elfw2(LIBELFBITS,getshdr_rdlock) (scn) 23725b3c049e70834cf33790a28643ab058b507b35cBen Cheng Elf_Scn *scn; 23825b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 23925b3c049e70834cf33790a28643ab058b507b35cBen Cheng ElfW2(LIBELFBITS,Shdr) *result; 24025b3c049e70834cf33790a28643ab058b507b35cBen Cheng 24125b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (!scn_valid (scn)) 24225b3c049e70834cf33790a28643ab058b507b35cBen Cheng return NULL; 24325b3c049e70834cf33790a28643ab058b507b35cBen Cheng 24425b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = scn->shdr.ELFW(e,LIBELFBITS); 24525b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (result == NULL) 24625b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 24725b3c049e70834cf33790a28643ab058b507b35cBen Cheng rwlock_unlock (scn->elf->lock); 24825b3c049e70834cf33790a28643ab058b507b35cBen Cheng rwlock_wrlock (scn->elf->lock); 24925b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = scn->shdr.ELFW(e,LIBELFBITS); 25025b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (result == NULL) 25125b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = load_shdr_wrlock (scn); 25225b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 25325b3c049e70834cf33790a28643ab058b507b35cBen Cheng 25425b3c049e70834cf33790a28643ab058b507b35cBen Cheng return result; 25525b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 25625b3c049e70834cf33790a28643ab058b507b35cBen Cheng 25725b3c049e70834cf33790a28643ab058b507b35cBen ChengElfW2(LIBELFBITS,Shdr) * 25825b3c049e70834cf33790a28643ab058b507b35cBen Cheng__elfw2(LIBELFBITS,getshdr_wrlock) (scn) 25925b3c049e70834cf33790a28643ab058b507b35cBen Cheng Elf_Scn *scn; 26025b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 26125b3c049e70834cf33790a28643ab058b507b35cBen Cheng ElfW2(LIBELFBITS,Shdr) *result; 26225b3c049e70834cf33790a28643ab058b507b35cBen Cheng 26325b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (!scn_valid (scn)) 26425b3c049e70834cf33790a28643ab058b507b35cBen Cheng return NULL; 26525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 26625b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = scn->shdr.ELFW(e,LIBELFBITS); 26725b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (result == NULL) 26825b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = load_shdr_wrlock (scn); 26925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 27025b3c049e70834cf33790a28643ab058b507b35cBen Cheng return result; 27125b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 27225b3c049e70834cf33790a28643ab058b507b35cBen Cheng 27325b3c049e70834cf33790a28643ab058b507b35cBen ChengElfW2(LIBELFBITS,Shdr) * 27425b3c049e70834cf33790a28643ab058b507b35cBen Chengelfw2(LIBELFBITS,getshdr) (scn) 27525b3c049e70834cf33790a28643ab058b507b35cBen Cheng Elf_Scn *scn; 27625b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 27725b3c049e70834cf33790a28643ab058b507b35cBen Cheng ElfW2(LIBELFBITS,Shdr) *result; 27825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 27925b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (!scn_valid (scn)) 28025b3c049e70834cf33790a28643ab058b507b35cBen Cheng return NULL; 28125b3c049e70834cf33790a28643ab058b507b35cBen Cheng 28225b3c049e70834cf33790a28643ab058b507b35cBen Cheng rwlock_rdlock (scn->elf->lock); 28325b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = __elfw2(LIBELFBITS,getshdr_rdlock) (scn); 28425b3c049e70834cf33790a28643ab058b507b35cBen Cheng rwlock_unlock (scn->elf->lock); 28525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 28625b3c049e70834cf33790a28643ab058b507b35cBen Cheng return result; 28725b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 288