1 /* AArch64 specific symbolic name handling. 2 Copyright (C) 2013, 2015 Red Hat, Inc. 3 This file is part of elfutils. 4 5 This file is free software; you can redistribute it and/or modify 6 it under the terms of either 7 8 * the GNU Lesser General Public License as published by the Free 9 Software Foundation; either version 3 of the License, or (at 10 your option) any later version 11 12 or 13 14 * the GNU General Public License as published by the Free 15 Software Foundation; either version 2 of the License, or (at 16 your option) any later version 17 18 or both in parallel, as here. 19 20 elfutils is distributed in the hope that it will be useful, but 21 WITHOUT ANY WARRANTY; without even the implied warranty of 22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 23 General Public License for more details. 24 25 You should have received copies of the GNU General Public License and 26 the GNU Lesser General Public License along with this program. If 27 not, see <http://www.gnu.org/licenses/>. */ 28 29 #ifdef HAVE_CONFIG_H 30 # include <config.h> 31 #endif 32 33 #include <elf.h> 34 #include <stddef.h> 35 #include <string.h> 36 37 #define BACKEND aarch64_ 38 #include "libebl_CPU.h" 39 40 41 /* Check for the simple reloc types. */ 42 Elf_Type 43 aarch64_reloc_simple_type (Ebl *ebl __attribute__ ((unused)), int type) 44 { 45 switch (type) 46 { 47 case R_AARCH64_ABS64: 48 return ELF_T_XWORD; 49 case R_AARCH64_ABS32: 50 return ELF_T_WORD; 51 case R_AARCH64_ABS16: 52 return ELF_T_HALF; 53 54 default: 55 return ELF_T_NUM; 56 } 57 } 58 59 /* If this is the _GLOBAL_OFFSET_TABLE_ symbol, then it should point in 60 the .got even if there is a .got.plt section. 61 https://sourceware.org/ml/libc-ports/2013-06/msg00057.html 62 https://bugzilla.redhat.com/show_bug.cgi?id=1201778 63 */ 64 bool 65 aarch64_check_special_symbol (Elf *elf, GElf_Ehdr *ehdr, const GElf_Sym *sym, 66 const char *name, const GElf_Shdr *destshdr) 67 { 68 if (name != NULL 69 && strcmp (name, "_GLOBAL_OFFSET_TABLE_") == 0) 70 { 71 const char *sname = elf_strptr (elf, ehdr->e_shstrndx, destshdr->sh_name); 72 if (sname != NULL 73 && (strcmp (sname, ".got") == 0 || strcmp (sname, ".got.plt") == 0)) 74 { 75 Elf_Scn *scn = NULL; 76 while ((scn = elf_nextscn (elf, scn)) != NULL) 77 { 78 GElf_Shdr shdr_mem; 79 GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem); 80 if (shdr != NULL) 81 { 82 sname = elf_strptr (elf, ehdr->e_shstrndx, shdr->sh_name); 83 if (sname != NULL && strcmp (sname, ".got") == 0) 84 return (sym->st_value >= shdr->sh_addr 85 && sym->st_value < shdr->sh_addr + shdr->sh_size); 86 } 87 } 88 } 89 } 90 91 return false; 92 } 93
