1005 lines
25 KiB
C
1005 lines
25 KiB
C
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/*-
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* Copyright (c) 2001 Jake Burkholder
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/elf32.h>
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#include <sys/elf64.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <err.h>
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#include <fcntl.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#define ED_DYN (1<<0)
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#define ED_EHDR (1<<1)
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#define ED_GOT (1<<2)
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#define ED_HASH (1<<3)
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#define ED_INTERP (1<<4)
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#define ED_NOTE (1<<5)
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#define ED_PHDR (1<<6)
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#define ED_REL (1<<7)
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#define ED_SHDR (1<<8)
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#define ED_SYMTAB (1<<9)
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#define ED_ALL ((1<<10)-1)
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#define elf_get_addr elf_get_quad
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#define elf_get_off elf_get_quad
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#define elf_get_size elf_get_quad
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enum elf_member {
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D_TAG = 1, D_PTR, D_VAL,
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E_CLASS, E_DATA, E_OSABI, E_TYPE, E_MACHINE, E_VERSION, E_ENTRY,
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E_PHOFF, E_SHOFF, E_FLAGS, E_EHSIZE, E_PHENTSIZE, E_PHNUM, E_SHENTSIZE,
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E_SHNUM, E_SHSTRNDX,
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N_NAMESZ, N_DESCSZ, N_TYPE,
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P_TYPE, P_OFFSET, P_VADDR, P_PADDR, P_FILESZ, P_MEMSZ, P_FLAGS,
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P_ALIGN,
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SH_NAME, SH_TYPE, SH_FLAGS, SH_ADDR, SH_OFFSET, SH_SIZE, SH_LINK,
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SH_INFO, SH_ADDRALIGN, SH_ENTSIZE,
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ST_NAME, ST_VALUE, ST_SIZE, ST_INFO, ST_SHNDX,
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R_OFFSET, R_INFO,
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RA_OFFSET, RA_INFO, RA_ADDEND
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};
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typedef enum elf_member elf_member_t;
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int elf32_offsets[] = {
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0,
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offsetof(Elf32_Dyn, d_tag), offsetof(Elf32_Dyn, d_un.d_ptr),
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offsetof(Elf32_Dyn, d_un.d_val),
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offsetof(Elf32_Ehdr, e_ident[EI_CLASS]),
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offsetof(Elf32_Ehdr, e_ident[EI_DATA]),
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offsetof(Elf32_Ehdr, e_ident[EI_OSABI]),
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offsetof(Elf32_Ehdr, e_type), offsetof(Elf32_Ehdr, e_machine),
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offsetof(Elf32_Ehdr, e_version), offsetof(Elf32_Ehdr, e_entry),
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offsetof(Elf32_Ehdr, e_phoff), offsetof(Elf32_Ehdr, e_shoff),
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offsetof(Elf32_Ehdr, e_flags), offsetof(Elf32_Ehdr, e_ehsize),
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offsetof(Elf32_Ehdr, e_phentsize), offsetof(Elf32_Ehdr, e_phnum),
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offsetof(Elf32_Ehdr, e_shentsize), offsetof(Elf32_Ehdr, e_shnum),
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offsetof(Elf32_Ehdr, e_shstrndx),
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offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz),
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offsetof(Elf_Note, n_type),
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offsetof(Elf32_Phdr, p_type), offsetof(Elf32_Phdr, p_offset),
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offsetof(Elf32_Phdr, p_vaddr), offsetof(Elf32_Phdr, p_paddr),
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offsetof(Elf32_Phdr, p_filesz), offsetof(Elf32_Phdr, p_memsz),
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offsetof(Elf32_Phdr, p_flags), offsetof(Elf32_Phdr, p_align),
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offsetof(Elf32_Shdr, sh_name), offsetof(Elf32_Shdr, sh_type),
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offsetof(Elf32_Shdr, sh_flags), offsetof(Elf32_Shdr, sh_addr),
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offsetof(Elf32_Shdr, sh_offset), offsetof(Elf32_Shdr, sh_size),
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offsetof(Elf32_Shdr, sh_link), offsetof(Elf32_Shdr, sh_info),
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offsetof(Elf32_Shdr, sh_addralign), offsetof(Elf32_Shdr, sh_entsize),
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offsetof(Elf32_Sym, st_name), offsetof(Elf32_Sym, st_value),
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offsetof(Elf32_Sym, st_size), offsetof(Elf32_Sym, st_info),
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offsetof(Elf32_Sym, st_shndx),
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offsetof(Elf32_Rel, r_offset), offsetof(Elf32_Rel, r_info),
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offsetof(Elf32_Rela, r_offset), offsetof(Elf32_Rela, r_info),
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offsetof(Elf32_Rela, r_addend)
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};
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int elf64_offsets[] = {
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0,
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offsetof(Elf64_Dyn, d_tag), offsetof(Elf64_Dyn, d_un.d_ptr),
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offsetof(Elf64_Dyn, d_un.d_val),
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offsetof(Elf32_Ehdr, e_ident[EI_CLASS]),
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offsetof(Elf32_Ehdr, e_ident[EI_DATA]),
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offsetof(Elf32_Ehdr, e_ident[EI_OSABI]),
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offsetof(Elf64_Ehdr, e_type), offsetof(Elf64_Ehdr, e_machine),
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offsetof(Elf64_Ehdr, e_version), offsetof(Elf64_Ehdr, e_entry),
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offsetof(Elf64_Ehdr, e_phoff), offsetof(Elf64_Ehdr, e_shoff),
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offsetof(Elf64_Ehdr, e_flags), offsetof(Elf64_Ehdr, e_ehsize),
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offsetof(Elf64_Ehdr, e_phentsize), offsetof(Elf64_Ehdr, e_phnum),
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offsetof(Elf64_Ehdr, e_shentsize), offsetof(Elf64_Ehdr, e_shnum),
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offsetof(Elf64_Ehdr, e_shstrndx),
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offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz),
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offsetof(Elf_Note, n_type),
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offsetof(Elf64_Phdr, p_type), offsetof(Elf64_Phdr, p_offset),
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offsetof(Elf64_Phdr, p_vaddr), offsetof(Elf64_Phdr, p_paddr),
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offsetof(Elf64_Phdr, p_filesz), offsetof(Elf64_Phdr, p_memsz),
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offsetof(Elf64_Phdr, p_flags), offsetof(Elf64_Phdr, p_align),
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offsetof(Elf64_Shdr, sh_name), offsetof(Elf64_Shdr, sh_type),
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offsetof(Elf64_Shdr, sh_flags), offsetof(Elf64_Shdr, sh_addr),
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offsetof(Elf64_Shdr, sh_offset), offsetof(Elf64_Shdr, sh_size),
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offsetof(Elf64_Shdr, sh_link), offsetof(Elf64_Shdr, sh_info),
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offsetof(Elf64_Shdr, sh_addralign), offsetof(Elf64_Shdr, sh_entsize),
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offsetof(Elf64_Sym, st_name), offsetof(Elf64_Sym, st_value),
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offsetof(Elf64_Sym, st_size), offsetof(Elf64_Sym, st_info),
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offsetof(Elf64_Sym, st_shndx),
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offsetof(Elf64_Rel, r_offset), offsetof(Elf64_Rel, r_info),
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offsetof(Elf64_Rela, r_offset), offsetof(Elf64_Rela, r_info),
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offsetof(Elf64_Rela, r_addend)
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};
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char *d_tags[] = {
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"DT_NULL", "DT_NEEDED", "DT_PLTRELSZ", "DT_PLTGOT", "DT_HASH",
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"DT_STRTAB", "DT_SYMTAB", "DT_RELA", "DT_RELASZ", "DT_RELAENT",
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"DT_STRSZ", "DT_SYMENT", "DT_INIT", "DT_FINI", "DT_SONAME",
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"DT_RPATH", "DT_SYMBOLIC", "DT_REL", "DT_RELSZ", "DT_RELENT",
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"DT_PLTREL", "DT_DEBUG", "DT_TEXTREL", "DT_JMPREL"
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};
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char *e_machines[] = {
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"EM_NONE", "EM_M32", "EM_SPARC", "EM_386", "EM_68K", "EM_88K",
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"EM_486", "EM_860", "EM_MIPS"
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};
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char *e_types[] = {
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"ET_NONE", "ET_REL", "ET_EXEC", "ET_DYN", "ET_CORE"
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};
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char *ei_versions[] = {
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"EV_NONE", "EV_CURRENT"
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};
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char *ei_classes[] = {
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"ELFCLASSNONE", "ELFCLASS32", "ELFCLASS64"
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};
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char *ei_data[] = {
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"ELFDATANONE", "ELFDATA2LSB", "ELFDATA2MSB"
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};
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char *ei_abis[] = {
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"ELFOSABI_SYSV", "ELFOSABI_HPUX", "ELFOSABI_NETBSD", "ELFOSABI_LINUX",
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"ELFOSABI_HURD", "ELFOSABI_86OPEN", "ELFOSABI_SOLARIS",
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"ELFOSABI_MONTEREY", "ELFOSABI_IRIX", "ELFOSABI_FREEBSD",
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"ELFOSABI_TRU64", "ELFOSABI_MODESTO", "ELFOSABI_OPENBSD"
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};
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char *p_types[] = {
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"PT_NULL", "PT_LOAD", "PT_DYNAMIC", "PT_INTERP", "PT_NOTE",
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"PT_SHLIB", "PT_PHDR"
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};
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char *p_flags[] = {
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"", "PF_X", "PF_W", "PF_X|PF_W", "PF_R", "PF_X|PF_R", "PF_W|PF_R",
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"PF_X|PF_W|PF_R"
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};
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char *sh_types[] = {
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"SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
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"SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE", "SHT_NOBITS",
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"SHT_REL", "SHT_SHLIB", "SHT_DYNSYM"
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};
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char *sh_flags[] = {
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"", "SHF_WRITE", "SHF_ALLOC", "SHF_WRITE|SHF_ALLOC", "SHF_EXECINSTR",
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"SHF_WRITE|SHF_EXECINSTR", "SHF_ALLOC|SHF_EXECINSTR",
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"SHF_WRITE|SHF_ALLOC|SHF_EXECINSTR"
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};
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char *st_types[] = {
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"STT_NOTYPE", "STT_OBJECT", "STT_FUNC", "STT_SECTION", "STT_FILE"
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};
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char *st_bindings[] = {
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"STB_LOCAL", "STB_GLOBAL", "STB_WEAK"
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};
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char *dynstr;
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char *shstrtab;
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char *strtab;
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FILE *out;
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u_int64_t elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member);
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u_int64_t elf_get_quarter(Elf32_Ehdr *e, void *base, elf_member_t member);
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u_int64_t elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member);
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u_int64_t elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member);
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u_int64_t elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member);
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void elf_print_ehdr(void *e);
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void elf_print_phdr(void *e, void *p);
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void elf_print_shdr(void *e, void *sh);
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void elf_print_symtab(void *e, void *sh, char *str);
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void elf_print_dynamic(void *e, void *sh);
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void elf_print_rel(void *e, void *r);
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void elf_print_rela(void *e, void *ra);
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void elf_print_interp(void *e, void *p);
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void elf_print_got(void *e, void *sh);
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void elf_print_hash(void *e, void *sh);
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void elf_print_note(void *e, void *sh);
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void usage(void);
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int
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main(int ac, char **av)
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{
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u_int64_t phoff;
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u_int64_t shoff;
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u_int64_t phentsize;
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u_int64_t phnum;
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u_int64_t shentsize;
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u_int64_t shnum;
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u_int64_t shstrndx;
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u_int64_t offset;
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u_int64_t name;
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u_int64_t type;
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struct stat sb;
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u_int flags;
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void *e;
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void *p;
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void *sh;
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void *v;
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int fd;
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int ch;
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int i;
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out = stdout;
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flags = 0;
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while ((ch = getopt(ac, av, "acdeiGhnprsw:")) != -1)
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switch (ch) {
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case 'a':
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flags = ED_ALL;
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break;
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case 'c':
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flags |= ED_SHDR;
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break;
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case 'd':
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flags |= ED_DYN;
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break;
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case 'e':
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flags |= ED_EHDR;
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break;
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case 'i':
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flags |= ED_INTERP;
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break;
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case 'G':
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flags |= ED_GOT;
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break;
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case 'h':
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flags |= ED_HASH;
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break;
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case 'n':
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flags |= ED_NOTE;
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break;
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case 'p':
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flags |= ED_PHDR;
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break;
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case 'r':
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flags |= ED_REL;
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break;
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case 's':
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flags |= ED_SYMTAB;
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break;
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case 'w':
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if ((out = fopen(optarg, "w")) == NULL)
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err(1, "%s", optarg);
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break;
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case '?':
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default:
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usage();
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}
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ac -= optind;
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av += optind;
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if (ac == 0 || flags == 0)
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usage();
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if ((fd = open(*av, O_RDONLY)) < 0 ||
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fstat(fd, &sb) < 0)
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err(1, NULL);
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e = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fd, 0);
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if (e == MAP_FAILED)
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err(1, NULL);
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if (!IS_ELF(*(Elf32_Ehdr *)e))
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errx(1, "not an elf file");
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phoff = elf_get_off(e, e, E_PHOFF);
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shoff = elf_get_off(e, e, E_SHOFF);
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phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
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phnum = elf_get_quarter(e, e, E_PHNUM);
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shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
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shnum = elf_get_quarter(e, e, E_SHNUM);
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shstrndx = elf_get_quarter(e, e, E_SHSTRNDX);
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p = e + phoff;
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sh = e + shoff;
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offset = elf_get_off(e, sh + shstrndx * shentsize, SH_OFFSET);
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shstrtab = e + offset;
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for (i = 0; i < shnum; i++) {
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name = elf_get_word(e, sh + i * shentsize, SH_NAME);
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offset = elf_get_off(e, sh + i * shentsize, SH_OFFSET);
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if (strcmp(shstrtab + name, ".strtab") == 0)
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strtab = e + offset;
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if (strcmp(shstrtab + name, ".dynstr") == 0)
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dynstr = e + offset;
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}
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if (flags & ED_EHDR)
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elf_print_ehdr(e);
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if (flags & ED_PHDR)
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elf_print_phdr(e, p);
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||
|
if (flags & ED_SHDR)
|
||
|
elf_print_shdr(e, sh);
|
||
|
for (i = 0; i < phnum; i++) {
|
||
|
v = p + i * phentsize;
|
||
|
type = elf_get_word(e, v, P_TYPE);
|
||
|
switch (type) {
|
||
|
case PT_INTERP:
|
||
|
if (flags & ED_INTERP)
|
||
|
elf_print_interp(e, v);
|
||
|
break;
|
||
|
case PT_NULL:
|
||
|
case PT_LOAD:
|
||
|
case PT_DYNAMIC:
|
||
|
case PT_NOTE:
|
||
|
case PT_SHLIB:
|
||
|
case PT_PHDR:
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
for (i = 0; i < shnum; i++) {
|
||
|
v = sh + i * shentsize;
|
||
|
type = elf_get_word(e, v, SH_TYPE);
|
||
|
switch (type) {
|
||
|
case SHT_SYMTAB:
|
||
|
if (flags & ED_SYMTAB)
|
||
|
elf_print_symtab(e, v, strtab);
|
||
|
break;
|
||
|
case SHT_DYNAMIC:
|
||
|
if (flags & ED_DYN)
|
||
|
elf_print_dynamic(e, v);
|
||
|
break;
|
||
|
case SHT_RELA:
|
||
|
if (flags & ED_REL)
|
||
|
elf_print_rela(e, v);
|
||
|
break;
|
||
|
case SHT_REL:
|
||
|
if (flags & ED_REL)
|
||
|
elf_print_rel(e, v);
|
||
|
break;
|
||
|
case SHT_NOTE:
|
||
|
name = elf_get_word(e, v, SH_NAME);
|
||
|
if (flags & ED_NOTE &&
|
||
|
strcmp(shstrtab + name, ".note.ABI-tag") == 0)
|
||
|
elf_print_note(e, v);
|
||
|
break;
|
||
|
case SHT_DYNSYM:
|
||
|
if (flags & ED_SYMTAB)
|
||
|
elf_print_symtab(e, v, dynstr);
|
||
|
break;
|
||
|
case SHT_PROGBITS:
|
||
|
name = elf_get_word(e, v, SH_NAME);
|
||
|
if (flags & ED_GOT &&
|
||
|
strcmp(shstrtab + name, ".got") == 0)
|
||
|
elf_print_got(e, v);
|
||
|
break;
|
||
|
case SHT_HASH:
|
||
|
if (flags & ED_HASH)
|
||
|
elf_print_hash(e, v);
|
||
|
break;
|
||
|
case SHT_NULL:
|
||
|
case SHT_STRTAB:
|
||
|
case SHT_NOBITS:
|
||
|
case SHT_SHLIB:
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
void
|
||
|
elf_print_ehdr(void *e)
|
||
|
{
|
||
|
u_int64_t class;
|
||
|
u_int64_t data;
|
||
|
u_int64_t osabi;
|
||
|
u_int64_t type;
|
||
|
u_int64_t machine;
|
||
|
u_int64_t version;
|
||
|
u_int64_t entry;
|
||
|
u_int64_t phoff;
|
||
|
u_int64_t shoff;
|
||
|
u_int64_t flags;
|
||
|
u_int64_t ehsize;
|
||
|
u_int64_t phentsize;
|
||
|
u_int64_t phnum;
|
||
|
u_int64_t shentsize;
|
||
|
u_int64_t shnum;
|
||
|
u_int64_t shstrndx;
|
||
|
|
||
|
class = elf_get_byte(e, e, E_CLASS);
|
||
|
data = elf_get_byte(e, e, E_DATA);
|
||
|
osabi = elf_get_byte(e, e, E_OSABI);
|
||
|
type = elf_get_quarter(e, e, E_TYPE);
|
||
|
machine = elf_get_quarter(e, e, E_MACHINE);
|
||
|
version = elf_get_word(e, e, E_VERSION);
|
||
|
entry = elf_get_addr(e, e, E_ENTRY);
|
||
|
phoff = elf_get_off(e, e, E_PHOFF);
|
||
|
shoff = elf_get_off(e, e, E_SHOFF);
|
||
|
flags = elf_get_word(e, e, E_FLAGS);
|
||
|
ehsize = elf_get_quarter(e, e, E_EHSIZE);
|
||
|
phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
|
||
|
phnum = elf_get_quarter(e, e, E_PHNUM);
|
||
|
shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
|
||
|
shnum = elf_get_quarter(e, e, E_SHNUM);
|
||
|
shstrndx = elf_get_quarter(e, e, E_SHSTRNDX);
|
||
|
fprintf(out, "\nelf header:\n");
|
||
|
fprintf(out, "\n");
|
||
|
fprintf(out, "\te_ident: %s %s %s\n", ei_classes[class], ei_data[data],
|
||
|
ei_abis[osabi]);
|
||
|
fprintf(out, "\te_type: %s\n", e_types[type]);
|
||
|
if (machine < sizeof e_machines / sizeof *e_machines)
|
||
|
fprintf(out, "\te_machine: %s\n", e_machines[machine]);
|
||
|
else
|
||
|
fprintf(out, "\te_machine: %lld\n", machine);
|
||
|
fprintf(out, "\te_version: %s\n", ei_versions[version]);
|
||
|
fprintf(out, "\te_entry: %#llx\n", entry);
|
||
|
fprintf(out, "\te_phoff: %lld\n", phoff);
|
||
|
fprintf(out, "\te_shoff: %lld\n", shoff);
|
||
|
fprintf(out, "\te_flags: %lld\n", flags);
|
||
|
fprintf(out, "\te_ehsize: %lld\n", ehsize);
|
||
|
fprintf(out, "\te_phentsize: %lld\n", phentsize);
|
||
|
fprintf(out, "\te_phnum: %lld\n", phnum);
|
||
|
fprintf(out, "\te_shentsize: %lld\n", shentsize);
|
||
|
fprintf(out, "\te_shnum: %lld\n", shnum);
|
||
|
fprintf(out, "\te_shstrndx: %lld\n", shstrndx);
|
||
|
}
|
||
|
|
||
|
void
|
||
|
elf_print_phdr(void *e, void *p)
|
||
|
{
|
||
|
u_int64_t phentsize;
|
||
|
u_int64_t phnum;
|
||
|
u_int64_t type;
|
||
|
u_int64_t offset;
|
||
|
u_int64_t vaddr;
|
||
|
u_int64_t paddr;
|
||
|
u_int64_t filesz;
|
||
|
u_int64_t memsz;
|
||
|
u_int64_t flags;
|
||
|
u_int64_t align;
|
||
|
void *v;
|
||
|
int i;
|
||
|
|
||
|
phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
|
||
|
phnum = elf_get_quarter(e, e, E_PHNUM);
|
||
|
fprintf(out, "\nprogram header:\n");
|
||
|
for (i = 0; i < phnum; i++) {
|
||
|
v = p + i * phentsize;
|
||
|
type = elf_get_word(e, v, P_TYPE);
|
||
|
offset = elf_get_off(e, v, P_OFFSET);
|
||
|
vaddr = elf_get_addr(e, v, P_VADDR);
|
||
|
paddr = elf_get_addr(e, v, P_PADDR);
|
||
|
filesz = elf_get_size(e, v, P_FILESZ);
|
||
|
memsz = elf_get_size(e, v, P_MEMSZ);
|
||
|
flags = elf_get_word(e, v, P_FLAGS);
|
||
|
align = elf_get_size(e, v, P_ALIGN);
|
||
|
fprintf(out, "\n");
|
||
|
fprintf(out, "entry: %d\n", i);
|
||
|
fprintf(out, "\tp_type: %s\n", p_types[type & 0x7]);
|
||
|
fprintf(out, "\tp_offset: %lld\n", offset);
|
||
|
fprintf(out, "\tp_vaddr: %#llx\n", vaddr);
|
||
|
fprintf(out, "\tp_paddr: %#llx\n", paddr);
|
||
|
fprintf(out, "\tp_filesz: %lld\n", filesz);
|
||
|
fprintf(out, "\tp_memsz: %lld\n", memsz);
|
||
|
fprintf(out, "\tp_flags: %s\n", p_flags[flags]);
|
||
|
fprintf(out, "\tp_align: %lld\n", align);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void
|
||
|
elf_print_shdr(void *e, void *sh)
|
||
|
{
|
||
|
u_int64_t shentsize;
|
||
|
u_int64_t shnum;
|
||
|
u_int64_t name;
|
||
|
u_int64_t type;
|
||
|
u_int64_t flags;
|
||
|
u_int64_t addr;
|
||
|
u_int64_t offset;
|
||
|
u_int64_t size;
|
||
|
u_int64_t link;
|
||
|
u_int64_t info;
|
||
|
u_int64_t addralign;
|
||
|
u_int64_t entsize;
|
||
|
void *v;
|
||
|
int i;
|
||
|
|
||
|
shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
|
||
|
shnum = elf_get_quarter(e, e, E_SHNUM);
|
||
|
fprintf(out, "\nsection header:\n");
|
||
|
for (i = 0; i < shnum; i++) {
|
||
|
v = sh + i * shentsize;
|
||
|
name = elf_get_word(e, v, SH_NAME);
|
||
|
type = elf_get_word(e, v, SH_TYPE);
|
||
|
flags = elf_get_word(e, v, SH_FLAGS);
|
||
|
addr = elf_get_addr(e, v, SH_ADDR);
|
||
|
offset = elf_get_off(e, v, SH_OFFSET);
|
||
|
size = elf_get_size(e, v, SH_SIZE);
|
||
|
link = elf_get_word(e, v, SH_LINK);
|
||
|
info = elf_get_word(e, v, SH_INFO);
|
||
|
addralign = elf_get_size(e, v, SH_ADDRALIGN);
|
||
|
entsize = elf_get_size(e, v, SH_ENTSIZE);
|
||
|
fprintf(out, "\n");
|
||
|
fprintf(out, "entry: %d\n", i);
|
||
|
fprintf(out, "\tsh_name: %s\n", shstrtab + name);
|
||
|
fprintf(out, "\tsh_type: %s\n", sh_types[type]);
|
||
|
fprintf(out, "\tsh_flags: %s\n", sh_flags[flags & 0x7]);
|
||
|
fprintf(out, "\tsh_addr: %#llx\n", addr);
|
||
|
fprintf(out, "\tsh_offset: %lld\n", offset);
|
||
|
fprintf(out, "\tsh_size: %lld\n", size);
|
||
|
fprintf(out, "\tsh_link: %lld\n", link);
|
||
|
fprintf(out, "\tsh_info: %lld\n", info);
|
||
|
fprintf(out, "\tsh_addralign: %lld\n", addralign);
|
||
|
fprintf(out, "\tsh_entsize: %lld\n", entsize);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void
|
||
|
elf_print_symtab(void *e, void *sh, char *str)
|
||
|
{
|
||
|
u_int64_t offset;
|
||
|
u_int64_t entsize;
|
||
|
u_int64_t size;
|
||
|
u_int64_t name;
|
||
|
u_int64_t value;
|
||
|
u_int64_t info;
|
||
|
u_int64_t shndx;
|
||
|
void *st;
|
||
|
int len;
|
||
|
int i;
|
||
|
|
||
|
offset = elf_get_off(e, sh, SH_OFFSET);
|
||
|
entsize = elf_get_size(e, sh, SH_ENTSIZE);
|
||
|
size = elf_get_size(e, sh, SH_SIZE);
|
||
|
name = elf_get_word(e, sh, SH_NAME);
|
||
|
len = size / entsize;
|
||
|
fprintf(out, "\nsymbol table (%s):\n", shstrtab + name);
|
||
|
for (i = 0; i < len; i++) {
|
||
|
st = e + offset + i * entsize;
|
||
|
name = elf_get_word(e, st, ST_NAME);
|
||
|
value = elf_get_addr(e, st, ST_VALUE);
|
||
|
size = elf_get_size(e, st, ST_SIZE);
|
||
|
info = elf_get_byte(e, st, ST_INFO);
|
||
|
shndx = elf_get_quarter(e, st, ST_SHNDX);
|
||
|
fprintf(out, "\n");
|
||
|
fprintf(out, "entry: %d\n", i);
|
||
|
fprintf(out, "\tst_name: %s\n", str + name);
|
||
|
fprintf(out, "\tst_value: %#llx\n", value);
|
||
|
fprintf(out, "\tst_size: %lld\n", size);
|
||
|
fprintf(out, "\tst_info: %s %s\n",
|
||
|
st_types[ELF32_ST_TYPE(info)],
|
||
|
st_bindings[ELF32_ST_BIND(info)]);
|
||
|
fprintf(out, "\tst_shndx: %lld\n", shndx);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void
|
||
|
elf_print_dynamic(void *e, void *sh)
|
||
|
{
|
||
|
u_int64_t offset;
|
||
|
u_int64_t entsize;
|
||
|
u_int64_t size;
|
||
|
int64_t tag;
|
||
|
u_int64_t ptr;
|
||
|
u_int64_t val;
|
||
|
void *d;
|
||
|
int i;
|
||
|
|
||
|
offset = elf_get_off(e, sh, SH_OFFSET);
|
||
|
entsize = elf_get_size(e, sh, SH_ENTSIZE);
|
||
|
size = elf_get_size(e, sh, SH_SIZE);
|
||
|
fprintf(out, "\ndynamic:\n");
|
||
|
for (i = 0; i < size / entsize; i++) {
|
||
|
d = e + offset + i * entsize;
|
||
|
tag = elf_get_size(e, d, D_TAG);
|
||
|
ptr = elf_get_size(e, d, D_PTR);
|
||
|
val = elf_get_addr(e, d, D_VAL);
|
||
|
fprintf(out, "\n");
|
||
|
fprintf(out, "entry: %d\n", i);
|
||
|
fprintf(out, "\td_tag: %s\n", d_tags[tag]);
|
||
|
switch (tag) {
|
||
|
case DT_NEEDED:
|
||
|
case DT_SONAME:
|
||
|
case DT_RPATH:
|
||
|
fprintf(out, "\td_val: %s\n", dynstr + val);
|
||
|
break;
|
||
|
case DT_PLTRELSZ:
|
||
|
case DT_RELA:
|
||
|
case DT_RELASZ:
|
||
|
case DT_RELAENT:
|
||
|
case DT_STRSZ:
|
||
|
case DT_SYMENT:
|
||
|
case DT_RELSZ:
|
||
|
case DT_RELENT:
|
||
|
case DT_PLTREL:
|
||
|
fprintf(out, "\td_val: %lld\n", val);
|
||
|
break;
|
||
|
case DT_PLTGOT:
|
||
|
case DT_HASH:
|
||
|
case DT_STRTAB:
|
||
|
case DT_SYMTAB:
|
||
|
case DT_INIT:
|
||
|
case DT_FINI:
|
||
|
case DT_REL:
|
||
|
case DT_JMPREL:
|
||
|
fprintf(out, "\td_ptr: %#llx\n", ptr);
|
||
|
break;
|
||
|
case DT_NULL:
|
||
|
case DT_SYMBOLIC:
|
||
|
case DT_DEBUG:
|
||
|
case DT_TEXTREL:
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void
|
||
|
elf_print_rela(void *e, void *sh)
|
||
|
{
|
||
|
u_int64_t offset;
|
||
|
u_int64_t entsize;
|
||
|
u_int64_t size;
|
||
|
u_int64_t name;
|
||
|
u_int64_t info;
|
||
|
int64_t addend;
|
||
|
void *ra;
|
||
|
void *v;
|
||
|
int i;
|
||
|
|
||
|
offset = elf_get_off(e, sh, SH_OFFSET);
|
||
|
entsize = elf_get_size(e, sh, SH_ENTSIZE);
|
||
|
size = elf_get_size(e, sh, SH_SIZE);
|
||
|
name = elf_get_word(e, sh, SH_NAME);
|
||
|
v = e + offset;
|
||
|
fprintf(out, "\nrelocation with addend (%s):\n", shstrtab + name);
|
||
|
for (i = 0; i < size / entsize; i++) {
|
||
|
ra = v + i * entsize;
|
||
|
offset = elf_get_addr(e, ra, RA_OFFSET);
|
||
|
info = elf_get_word(e, ra, RA_INFO);
|
||
|
addend = elf_get_off(e, ra, RA_ADDEND);
|
||
|
fprintf(out, "\n");
|
||
|
fprintf(out, "entry: %d\n", i);
|
||
|
fprintf(out, "\tr_offset: %#llx\n", offset);
|
||
|
fprintf(out, "\tr_info: %lld\n", info);
|
||
|
fprintf(out, "\tr_addend: %lld\n", addend);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void
|
||
|
elf_print_rel(void *e, void *sh)
|
||
|
{
|
||
|
u_int64_t offset;
|
||
|
u_int64_t entsize;
|
||
|
u_int64_t size;
|
||
|
u_int64_t name;
|
||
|
u_int64_t info;
|
||
|
void *r;
|
||
|
void *v;
|
||
|
int i;
|
||
|
|
||
|
offset = elf_get_off(e, sh, SH_OFFSET);
|
||
|
entsize = elf_get_size(e, sh, SH_ENTSIZE);
|
||
|
size = elf_get_size(e, sh, SH_SIZE);
|
||
|
name = elf_get_word(e, sh, SH_NAME);
|
||
|
v = e + offset;
|
||
|
fprintf(out, "\nrelocation (%s):\n", shstrtab + name);
|
||
|
for (i = 0; i < size / entsize; i++) {
|
||
|
r = v + i * entsize;
|
||
|
offset = elf_get_addr(e, r, R_OFFSET);
|
||
|
info = elf_get_word(e, r, R_INFO);
|
||
|
fprintf(out, "\n");
|
||
|
fprintf(out, "entry: %d\n", i);
|
||
|
fprintf(out, "\tr_offset: %#llx\n", offset);
|
||
|
fprintf(out, "\tr_info: %lld\n", info);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void
|
||
|
elf_print_interp(void *e, void *p)
|
||
|
{
|
||
|
u_int64_t offset;
|
||
|
char *s;
|
||
|
|
||
|
offset = elf_get_off(e, p, P_OFFSET);
|
||
|
s = e + offset;
|
||
|
fprintf(out, "\ninterp:\n");
|
||
|
fprintf(out, "\t%s\n", s);
|
||
|
}
|
||
|
|
||
|
void
|
||
|
elf_print_got(void *e, void *sh)
|
||
|
{
|
||
|
u_int64_t offset;
|
||
|
u_int64_t addralign;
|
||
|
u_int64_t size;
|
||
|
u_int64_t addr;
|
||
|
void *v;
|
||
|
int i;
|
||
|
|
||
|
offset = elf_get_off(e, sh, SH_OFFSET);
|
||
|
addralign = elf_get_size(e, sh, SH_ADDRALIGN);
|
||
|
size = elf_get_size(e, sh, SH_SIZE);
|
||
|
v = e + offset;
|
||
|
fprintf(out, "\nglobal offset table:\n");
|
||
|
for (i = 0; i < size / addralign; i++) {
|
||
|
addr = elf_get_addr(e, v + i * addralign, 0);
|
||
|
fprintf(out, "\n");
|
||
|
fprintf(out, "entry: %d\n", i);
|
||
|
fprintf(out, "\t%#llx\n", addr);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void
|
||
|
elf_print_hash(void *e, void *sh)
|
||
|
{
|
||
|
}
|
||
|
|
||
|
void
|
||
|
elf_print_note(void *e, void *sh)
|
||
|
{
|
||
|
u_int64_t offset;
|
||
|
u_int64_t size;
|
||
|
u_int64_t name;
|
||
|
u_int32_t namesz;
|
||
|
u_int32_t descsz;
|
||
|
u_int32_t type;
|
||
|
u_int32_t desc;
|
||
|
char *s;
|
||
|
void *n;
|
||
|
|
||
|
offset = elf_get_off(e, sh, SH_OFFSET);
|
||
|
size = elf_get_size(e, sh, SH_SIZE);
|
||
|
name = elf_get_word(e, sh, SH_NAME);
|
||
|
n = e + offset;
|
||
|
fprintf(out, "\nnote (%s):\n", shstrtab + name);
|
||
|
while (n < e + offset + size) {
|
||
|
namesz = elf_get_word(e, n, N_NAMESZ);
|
||
|
descsz = elf_get_word(e, n, N_DESCSZ);
|
||
|
type = elf_get_word(e, n, N_TYPE);
|
||
|
s = n + sizeof(Elf_Note);
|
||
|
desc = elf_get_word(e, n + sizeof(Elf_Note) + namesz, 0);
|
||
|
fprintf(out, "\t%s %d\n", s, desc);
|
||
|
n += sizeof(Elf_Note) + namesz + descsz;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
u_int64_t
|
||
|
elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member)
|
||
|
{
|
||
|
u_int64_t val;
|
||
|
u_char *p;
|
||
|
|
||
|
val = 0;
|
||
|
switch (e->e_ident[EI_CLASS]) {
|
||
|
case ELFCLASS32:
|
||
|
p = base + elf32_offsets[member];
|
||
|
val = *p;
|
||
|
break;
|
||
|
case ELFCLASS64:
|
||
|
p = base + elf64_offsets[member];
|
||
|
val = *p;
|
||
|
break;
|
||
|
case ELFCLASSNONE:
|
||
|
errx(1, "invalid class");
|
||
|
}
|
||
|
|
||
|
return val;
|
||
|
}
|
||
|
|
||
|
u_int64_t
|
||
|
elf_get_quarter(Elf32_Ehdr *e, void *base, elf_member_t member)
|
||
|
{
|
||
|
u_int64_t val;
|
||
|
u_char *p;
|
||
|
|
||
|
val = 0;
|
||
|
switch (e->e_ident[EI_CLASS]) {
|
||
|
case ELFCLASS32:
|
||
|
p = base + elf32_offsets[member];
|
||
|
switch (e->e_ident[EI_DATA]) {
|
||
|
case ELFDATA2MSB:
|
||
|
val = p[0] << 8 | p[1];
|
||
|
break;
|
||
|
case ELFDATA2LSB:
|
||
|
val = p[1] << 8 | p[0];
|
||
|
break;
|
||
|
case ELFDATANONE:
|
||
|
errx(1, "invalid data format");
|
||
|
}
|
||
|
break;
|
||
|
case ELFCLASS64:
|
||
|
p = base + elf64_offsets[member];
|
||
|
switch (e->e_ident[EI_DATA]) {
|
||
|
case ELFDATA2MSB:
|
||
|
val = p[0] << 8 | p[1];
|
||
|
break;
|
||
|
case ELFDATA2LSB:
|
||
|
val = p[1] << 8 | p[0];
|
||
|
break;
|
||
|
case ELFDATANONE:
|
||
|
errx(1, "invalid data format");
|
||
|
}
|
||
|
break;
|
||
|
case ELFCLASSNONE:
|
||
|
errx(1, "invalid class");
|
||
|
}
|
||
|
|
||
|
return val;
|
||
|
}
|
||
|
|
||
|
u_int64_t
|
||
|
elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member)
|
||
|
{
|
||
|
u_int64_t val;
|
||
|
u_char *p;
|
||
|
|
||
|
val = 0;
|
||
|
switch (e->e_ident[EI_CLASS]) {
|
||
|
case ELFCLASS32:
|
||
|
p = base + elf32_offsets[member];
|
||
|
switch (e->e_ident[EI_DATA]) {
|
||
|
case ELFDATA2MSB:
|
||
|
val = p[0] << 8 | p[1];
|
||
|
break;
|
||
|
case ELFDATA2LSB:
|
||
|
val = p[1] << 8 | p[0];
|
||
|
break;
|
||
|
case ELFDATANONE:
|
||
|
errx(1, "invalid data format");
|
||
|
}
|
||
|
break;
|
||
|
case ELFCLASS64:
|
||
|
p = base + elf64_offsets[member];
|
||
|
switch (e->e_ident[EI_DATA]) {
|
||
|
case ELFDATA2MSB:
|
||
|
val = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3];
|
||
|
break;
|
||
|
case ELFDATA2LSB:
|
||
|
val = p[3] << 24 | p[2] << 16 | p[1] << 8 | p[0];
|
||
|
break;
|
||
|
case ELFDATANONE:
|
||
|
errx(1, "invalid data format");
|
||
|
}
|
||
|
break;
|
||
|
case ELFCLASSNONE:
|
||
|
errx(1, "invalid class");
|
||
|
}
|
||
|
|
||
|
return val;
|
||
|
}
|
||
|
|
||
|
u_int64_t
|
||
|
elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member)
|
||
|
{
|
||
|
u_int64_t val;
|
||
|
u_char *p;
|
||
|
|
||
|
val = 0;
|
||
|
switch (e->e_ident[EI_CLASS]) {
|
||
|
case ELFCLASS32:
|
||
|
p = base + elf32_offsets[member];
|
||
|
switch (e->e_ident[EI_DATA]) {
|
||
|
case ELFDATA2MSB:
|
||
|
val = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3];
|
||
|
break;
|
||
|
case ELFDATA2LSB:
|
||
|
val = p[3] << 24 | p[2] << 16 | p[1] << 8 | p[0];
|
||
|
break;
|
||
|
case ELFDATANONE:
|
||
|
errx(1, "invalid data format");
|
||
|
}
|
||
|
break;
|
||
|
case ELFCLASS64:
|
||
|
p = base + elf64_offsets[member];
|
||
|
switch (e->e_ident[EI_DATA]) {
|
||
|
case ELFDATA2MSB:
|
||
|
val = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3];
|
||
|
break;
|
||
|
case ELFDATA2LSB:
|
||
|
val = p[3] << 24 | p[2] << 16 | p[1] << 8 | p[0];
|
||
|
break;
|
||
|
case ELFDATANONE:
|
||
|
errx(1, "invalid data format");
|
||
|
}
|
||
|
break;
|
||
|
case ELFCLASSNONE:
|
||
|
errx(1, "invalid class");
|
||
|
}
|
||
|
|
||
|
return val;
|
||
|
}
|
||
|
|
||
|
u_int64_t
|
||
|
elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member)
|
||
|
{
|
||
|
u_int64_t high;
|
||
|
u_int64_t low;
|
||
|
u_int64_t val;
|
||
|
u_char *p;
|
||
|
|
||
|
val = 0;
|
||
|
switch (e->e_ident[EI_CLASS]) {
|
||
|
case ELFCLASS32:
|
||
|
p = base + elf32_offsets[member];
|
||
|
switch (e->e_ident[EI_DATA]) {
|
||
|
case ELFDATA2MSB:
|
||
|
val = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3];
|
||
|
break;
|
||
|
case ELFDATA2LSB:
|
||
|
val = p[3] << 24 | p[2] << 16 | p[1] << 8 | p[0];
|
||
|
break;
|
||
|
case ELFDATANONE:
|
||
|
errx(1, "invalid data format");
|
||
|
}
|
||
|
break;
|
||
|
case ELFCLASS64:
|
||
|
p = base + elf64_offsets[member];
|
||
|
switch (e->e_ident[EI_DATA]) {
|
||
|
case ELFDATA2MSB:
|
||
|
high = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3];
|
||
|
low = p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7];
|
||
|
val = high << 32 | low;
|
||
|
break;
|
||
|
case ELFDATA2LSB:
|
||
|
high = p[7] << 24 | p[6] << 16 | p[5] << 8 | p[4];
|
||
|
low = p[3] << 24 | p[2] << 16 | p[1] << 8 | p[0];
|
||
|
val = high << 32 | low;
|
||
|
break;
|
||
|
case ELFDATANONE:
|
||
|
errx(1, "invalid data format");
|
||
|
}
|
||
|
break;
|
||
|
case ELFCLASSNONE:
|
||
|
errx(1, "invalid class");
|
||
|
}
|
||
|
|
||
|
return val;
|
||
|
}
|
||
|
|
||
|
void
|
||
|
usage(void)
|
||
|
{
|
||
|
fprintf(stderr, "usage: elfdump [-acdeiGhnprs] [-w file] filename\n");
|
||
|
exit(1);
|
||
|
}
|