1260 lines
34 KiB
C
1260 lines
34 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2003 David O'Brien. All rights reserved.
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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/capsicum.h>
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#include <sys/elf32.h>
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#include <sys/elf64.h>
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#include <sys/endian.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <capsicum_helpers.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <inttypes.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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static 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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static 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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/* http://www.sco.com/developers/gabi/latest/ch5.dynamic.html#tag_encodings */
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static const char *
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d_tags(u_int64_t tag)
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{
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static char unknown_tag[48];
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switch (tag) {
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case DT_NULL: return "DT_NULL";
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case DT_NEEDED: return "DT_NEEDED";
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case DT_PLTRELSZ: return "DT_PLTRELSZ";
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case DT_PLTGOT: return "DT_PLTGOT";
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case DT_HASH: return "DT_HASH";
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case DT_STRTAB: return "DT_STRTAB";
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case DT_SYMTAB: return "DT_SYMTAB";
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case DT_RELA: return "DT_RELA";
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case DT_RELASZ: return "DT_RELASZ";
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case DT_RELAENT: return "DT_RELAENT";
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case DT_STRSZ: return "DT_STRSZ";
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case DT_SYMENT: return "DT_SYMENT";
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case DT_INIT: return "DT_INIT";
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case DT_FINI: return "DT_FINI";
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case DT_SONAME: return "DT_SONAME";
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case DT_RPATH: return "DT_RPATH";
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case DT_SYMBOLIC: return "DT_SYMBOLIC";
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case DT_REL: return "DT_REL";
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case DT_RELSZ: return "DT_RELSZ";
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case DT_RELENT: return "DT_RELENT";
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case DT_PLTREL: return "DT_PLTREL";
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case DT_DEBUG: return "DT_DEBUG";
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case DT_TEXTREL: return "DT_TEXTREL";
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case DT_JMPREL: return "DT_JMPREL";
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case DT_BIND_NOW: return "DT_BIND_NOW";
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case DT_INIT_ARRAY: return "DT_INIT_ARRAY";
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case DT_FINI_ARRAY: return "DT_FINI_ARRAY";
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case DT_INIT_ARRAYSZ: return "DT_INIT_ARRAYSZ";
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case DT_FINI_ARRAYSZ: return "DT_FINI_ARRAYSZ";
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case DT_RUNPATH: return "DT_RUNPATH";
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case DT_FLAGS: return "DT_FLAGS";
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case DT_PREINIT_ARRAY: return "DT_PREINIT_ARRAY"; /* XXX DT_ENCODING */
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case DT_PREINIT_ARRAYSZ:return "DT_PREINIT_ARRAYSZ";
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/* 0x6000000D - 0x6ffff000 operating system-specific semantics */
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case 0x6ffffdf5: return "DT_GNU_PRELINKED";
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case 0x6ffffdf6: return "DT_GNU_CONFLICTSZ";
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case 0x6ffffdf7: return "DT_GNU_LIBLISTSZ";
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case 0x6ffffdf8: return "DT_SUNW_CHECKSUM";
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case DT_PLTPADSZ: return "DT_PLTPADSZ";
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case DT_MOVEENT: return "DT_MOVEENT";
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case DT_MOVESZ: return "DT_MOVESZ";
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case DT_FEATURE: return "DT_FEATURE";
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case DT_POSFLAG_1: return "DT_POSFLAG_1";
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case DT_SYMINSZ: return "DT_SYMINSZ";
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case DT_SYMINENT : return "DT_SYMINENT (DT_VALRNGHI)";
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case DT_ADDRRNGLO: return "DT_ADDRRNGLO";
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case DT_GNU_HASH: return "DT_GNU_HASH";
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case 0x6ffffef8: return "DT_GNU_CONFLICT";
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case 0x6ffffef9: return "DT_GNU_LIBLIST";
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case DT_CONFIG: return "DT_CONFIG";
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case DT_DEPAUDIT: return "DT_DEPAUDIT";
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case DT_AUDIT: return "DT_AUDIT";
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case DT_PLTPAD: return "DT_PLTPAD";
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case DT_MOVETAB: return "DT_MOVETAB";
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case DT_SYMINFO : return "DT_SYMINFO (DT_ADDRRNGHI)";
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case DT_RELACOUNT: return "DT_RELACOUNT";
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|
case DT_RELCOUNT: return "DT_RELCOUNT";
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|
case DT_FLAGS_1: return "DT_FLAGS_1";
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|
case DT_VERDEF: return "DT_VERDEF";
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case DT_VERDEFNUM: return "DT_VERDEFNUM";
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case DT_VERNEED: return "DT_VERNEED";
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case DT_VERNEEDNUM: return "DT_VERNEEDNUM";
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case 0x6ffffff0: return "DT_GNU_VERSYM";
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/* 0x70000000 - 0x7fffffff processor-specific semantics */
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case 0x70000000: return "DT_IA_64_PLT_RESERVE";
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case DT_AUXILIARY: return "DT_AUXILIARY";
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case DT_USED: return "DT_USED";
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case DT_FILTER: return "DT_FILTER";
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}
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snprintf(unknown_tag, sizeof(unknown_tag),
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"ERROR: TAG NOT DEFINED -- tag 0x%jx", (uintmax_t)tag);
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return (unknown_tag);
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}
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static const char *
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e_machines(u_int mach)
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{
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static char machdesc[64];
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switch (mach) {
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case EM_NONE: return "EM_NONE";
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case EM_M32: return "EM_M32";
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case EM_SPARC: return "EM_SPARC";
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case EM_386: return "EM_386";
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case EM_68K: return "EM_68K";
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case EM_88K: return "EM_88K";
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case EM_IAMCU: return "EM_IAMCU";
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case EM_860: return "EM_860";
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case EM_MIPS: return "EM_MIPS";
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case EM_PPC: return "EM_PPC";
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case EM_PPC64: return "EM_PPC64";
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case EM_ARM: return "EM_ARM";
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case EM_ALPHA: return "EM_ALPHA (legacy)";
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case EM_SPARCV9:return "EM_SPARCV9";
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case EM_IA_64: return "EM_IA_64";
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case EM_X86_64: return "EM_X86_64";
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case EM_AARCH64:return "EM_AARCH64";
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case EM_RISCV: return "EM_RISCV";
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}
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snprintf(machdesc, sizeof(machdesc),
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"(unknown machine) -- type 0x%x", mach);
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return (machdesc);
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}
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static const 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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static const char *ei_versions[] = {
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"EV_NONE", "EV_CURRENT"
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};
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static const char *ei_classes[] = {
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"ELFCLASSNONE", "ELFCLASS32", "ELFCLASS64"
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};
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static const char *ei_data[] = {
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"ELFDATANONE", "ELFDATA2LSB", "ELFDATA2MSB"
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};
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static const char *ei_abis[256] = {
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"ELFOSABI_NONE", "ELFOSABI_HPUX", "ELFOSABI_NETBSD", "ELFOSABI_LINUX",
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"ELFOSABI_HURD", "ELFOSABI_86OPEN", "ELFOSABI_SOLARIS", "ELFOSABI_AIX",
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"ELFOSABI_IRIX", "ELFOSABI_FREEBSD", "ELFOSABI_TRU64",
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"ELFOSABI_MODESTO", "ELFOSABI_OPENBSD",
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[255] = "ELFOSABI_STANDALONE"
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};
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static const 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", "PT_TLS"
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};
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static const 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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|
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/* http://www.sco.com/developers/gabi/latest/ch4.sheader.html#sh_type */
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static const char *
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sh_types(uint64_t machine, uint64_t sht) {
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static char unknown_buf[64];
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|
|
if (sht < 0x60000000) {
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|
switch (sht) {
|
|
case SHT_NULL: return "SHT_NULL";
|
|
case SHT_PROGBITS: return "SHT_PROGBITS";
|
|
case SHT_SYMTAB: return "SHT_SYMTAB";
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|
case SHT_STRTAB: return "SHT_STRTAB";
|
|
case SHT_RELA: return "SHT_RELA";
|
|
case SHT_HASH: return "SHT_HASH";
|
|
case SHT_DYNAMIC: return "SHT_DYNAMIC";
|
|
case SHT_NOTE: return "SHT_NOTE";
|
|
case SHT_NOBITS: return "SHT_NOBITS";
|
|
case SHT_REL: return "SHT_REL";
|
|
case SHT_SHLIB: return "SHT_SHLIB";
|
|
case SHT_DYNSYM: return "SHT_DYNSYM";
|
|
case SHT_INIT_ARRAY: return "SHT_INIT_ARRAY";
|
|
case SHT_FINI_ARRAY: return "SHT_FINI_ARRAY";
|
|
case SHT_PREINIT_ARRAY: return "SHT_PREINIT_ARRAY";
|
|
case SHT_GROUP: return "SHT_GROUP";
|
|
case SHT_SYMTAB_SHNDX: return "SHT_SYMTAB_SHNDX";
|
|
}
|
|
snprintf(unknown_buf, sizeof(unknown_buf),
|
|
"ERROR: SHT %ju NOT DEFINED", (uintmax_t)sht);
|
|
return (unknown_buf);
|
|
} else if (sht < 0x70000000) {
|
|
/* 0x60000000-0x6fffffff operating system-specific semantics */
|
|
switch (sht) {
|
|
case 0x6ffffff0: return "XXX:VERSYM";
|
|
case SHT_SUNW_dof: return "SHT_SUNW_dof";
|
|
case SHT_GNU_HASH: return "SHT_GNU_HASH";
|
|
case 0x6ffffff7: return "SHT_GNU_LIBLIST";
|
|
case 0x6ffffffc: return "XXX:VERDEF";
|
|
case SHT_SUNW_verdef: return "SHT_SUNW(GNU)_verdef";
|
|
case SHT_SUNW_verneed: return "SHT_SUNW(GNU)_verneed";
|
|
case SHT_SUNW_versym: return "SHT_SUNW(GNU)_versym";
|
|
}
|
|
snprintf(unknown_buf, sizeof(unknown_buf),
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|
"ERROR: OS-SPECIFIC SHT 0x%jx NOT DEFINED",
|
|
(uintmax_t)sht);
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|
return (unknown_buf);
|
|
} else if (sht < 0x80000000) {
|
|
/* 0x70000000-0x7fffffff processor-specific semantics */
|
|
switch (machine) {
|
|
case EM_ARM:
|
|
switch (sht) {
|
|
case SHT_ARM_EXIDX: return "SHT_ARM_EXIDX";
|
|
case SHT_ARM_PREEMPTMAP:return "SHT_ARM_PREEMPTMAP";
|
|
case SHT_ARM_ATTRIBUTES:return "SHT_ARM_ATTRIBUTES";
|
|
case SHT_ARM_DEBUGOVERLAY:
|
|
return "SHT_ARM_DEBUGOVERLAY";
|
|
case SHT_ARM_OVERLAYSECTION:
|
|
return "SHT_ARM_OVERLAYSECTION";
|
|
}
|
|
break;
|
|
case EM_IA_64:
|
|
switch (sht) {
|
|
case 0x70000000: return "SHT_IA_64_EXT";
|
|
case 0x70000001: return "SHT_IA_64_UNWIND";
|
|
}
|
|
break;
|
|
case EM_MIPS:
|
|
switch (sht) {
|
|
case SHT_MIPS_REGINFO: return "SHT_MIPS_REGINFO";
|
|
case SHT_MIPS_OPTIONS: return "SHT_MIPS_OPTIONS";
|
|
case SHT_MIPS_ABIFLAGS: return "SHT_MIPS_ABIFLAGS";
|
|
}
|
|
break;
|
|
}
|
|
switch (sht) {
|
|
case 0x7ffffffd: return "XXX:AUXILIARY";
|
|
case 0x7fffffff: return "XXX:FILTER";
|
|
}
|
|
snprintf(unknown_buf, sizeof(unknown_buf),
|
|
"ERROR: PROCESSOR-SPECIFIC SHT 0x%jx NOT DEFINED",
|
|
(uintmax_t)sht);
|
|
return (unknown_buf);
|
|
} else {
|
|
/* 0x80000000-0xffffffff application programs */
|
|
snprintf(unknown_buf, sizeof(unknown_buf),
|
|
"ERROR: SHT 0x%jx NOT DEFINED",
|
|
(uintmax_t)sht);
|
|
return (unknown_buf);
|
|
}
|
|
}
|
|
|
|
static const char *sh_flags[] = {
|
|
"", "SHF_WRITE", "SHF_ALLOC", "SHF_WRITE|SHF_ALLOC", "SHF_EXECINSTR",
|
|
"SHF_WRITE|SHF_EXECINSTR", "SHF_ALLOC|SHF_EXECINSTR",
|
|
"SHF_WRITE|SHF_ALLOC|SHF_EXECINSTR"
|
|
};
|
|
|
|
static const char *
|
|
st_type(unsigned int mach, unsigned int type)
|
|
{
|
|
static char s_type[32];
|
|
|
|
switch (type) {
|
|
case STT_NOTYPE: return "STT_NOTYPE";
|
|
case STT_OBJECT: return "STT_OBJECT";
|
|
case STT_FUNC: return "STT_FUNC";
|
|
case STT_SECTION: return "STT_SECTION";
|
|
case STT_FILE: return "STT_FILE";
|
|
case STT_COMMON: return "STT_COMMON";
|
|
case STT_TLS: return "STT_TLS";
|
|
case 13:
|
|
if (mach == EM_SPARCV9)
|
|
return "STT_SPARC_REGISTER";
|
|
break;
|
|
}
|
|
snprintf(s_type, sizeof(s_type), "<unknown: %#x>", type);
|
|
return (s_type);
|
|
}
|
|
|
|
static const char *st_bindings[] = {
|
|
"STB_LOCAL", "STB_GLOBAL", "STB_WEAK"
|
|
};
|
|
|
|
static char *dynstr;
|
|
static char *shstrtab;
|
|
static char *strtab;
|
|
static FILE *out;
|
|
|
|
static u_int64_t elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member);
|
|
static u_int64_t elf_get_quarter(Elf32_Ehdr *e, void *base,
|
|
elf_member_t member);
|
|
#if 0
|
|
static u_int64_t elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member);
|
|
#endif
|
|
static u_int64_t elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member);
|
|
static u_int64_t elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member);
|
|
|
|
static void elf_print_ehdr(Elf32_Ehdr *e, void *sh);
|
|
static void elf_print_phdr(Elf32_Ehdr *e, void *p);
|
|
static void elf_print_shdr(Elf32_Ehdr *e, void *sh);
|
|
static void elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str);
|
|
static void elf_print_dynamic(Elf32_Ehdr *e, void *sh);
|
|
static void elf_print_rel(Elf32_Ehdr *e, void *r);
|
|
static void elf_print_rela(Elf32_Ehdr *e, void *ra);
|
|
static void elf_print_interp(Elf32_Ehdr *e, void *p);
|
|
static void elf_print_got(Elf32_Ehdr *e, void *sh);
|
|
static void elf_print_hash(Elf32_Ehdr *e, void *sh);
|
|
static void elf_print_note(Elf32_Ehdr *e, void *sh);
|
|
|
|
static void usage(void);
|
|
|
|
/*
|
|
* Helpers for ELF files with shnum or shstrndx values that don't fit in the
|
|
* ELF header. If the values are too large then an escape value is used to
|
|
* indicate that the actual value is found in one of section 0's fields.
|
|
*/
|
|
static uint64_t
|
|
elf_get_shnum(Elf32_Ehdr *e, void *sh)
|
|
{
|
|
uint64_t shnum;
|
|
|
|
shnum = elf_get_quarter(e, e, E_SHNUM);
|
|
if (shnum == 0)
|
|
shnum = elf_get_word(e, (char *)sh, SH_SIZE);
|
|
return shnum;
|
|
}
|
|
|
|
static uint64_t
|
|
elf_get_shstrndx(Elf32_Ehdr *e, void *sh)
|
|
{
|
|
uint64_t shstrndx;
|
|
|
|
shstrndx = elf_get_quarter(e, e, E_SHSTRNDX);
|
|
if (shstrndx == SHN_XINDEX)
|
|
shstrndx = elf_get_word(e, (char *)sh, SH_LINK);
|
|
return shstrndx;
|
|
}
|
|
|
|
int
|
|
main(int ac, char **av)
|
|
{
|
|
cap_rights_t rights;
|
|
u_int64_t phoff;
|
|
u_int64_t shoff;
|
|
u_int64_t phentsize;
|
|
u_int64_t phnum;
|
|
u_int64_t shentsize;
|
|
u_int64_t shnum;
|
|
u_int64_t shstrndx;
|
|
u_int64_t offset;
|
|
u_int64_t name;
|
|
u_int64_t type;
|
|
struct stat sb;
|
|
u_int flags;
|
|
Elf32_Ehdr *e;
|
|
void *p;
|
|
void *sh;
|
|
void *v;
|
|
int fd;
|
|
int ch;
|
|
int i;
|
|
|
|
out = stdout;
|
|
flags = 0;
|
|
while ((ch = getopt(ac, av, "acdeiGhnprsw:")) != -1)
|
|
switch (ch) {
|
|
case 'a':
|
|
flags = ED_ALL;
|
|
break;
|
|
case 'c':
|
|
flags |= ED_SHDR;
|
|
break;
|
|
case 'd':
|
|
flags |= ED_DYN;
|
|
break;
|
|
case 'e':
|
|
flags |= ED_EHDR;
|
|
break;
|
|
case 'i':
|
|
flags |= ED_INTERP;
|
|
break;
|
|
case 'G':
|
|
flags |= ED_GOT;
|
|
break;
|
|
case 'h':
|
|
flags |= ED_HASH;
|
|
break;
|
|
case 'n':
|
|
flags |= ED_NOTE;
|
|
break;
|
|
case 'p':
|
|
flags |= ED_PHDR;
|
|
break;
|
|
case 'r':
|
|
flags |= ED_REL;
|
|
break;
|
|
case 's':
|
|
flags |= ED_SYMTAB;
|
|
break;
|
|
case 'w':
|
|
if ((out = fopen(optarg, "w")) == NULL)
|
|
err(1, "%s", optarg);
|
|
cap_rights_init(&rights, CAP_FSTAT, CAP_WRITE);
|
|
if (cap_rights_limit(fileno(out), &rights) < 0 && errno != ENOSYS)
|
|
err(1, "unable to limit rights for %s", optarg);
|
|
break;
|
|
case '?':
|
|
default:
|
|
usage();
|
|
}
|
|
ac -= optind;
|
|
av += optind;
|
|
if (ac == 0 || flags == 0)
|
|
usage();
|
|
if ((fd = open(*av, O_RDONLY)) < 0 ||
|
|
fstat(fd, &sb) < 0)
|
|
err(1, "%s", *av);
|
|
cap_rights_init(&rights, CAP_MMAP_R);
|
|
if (cap_rights_limit(fd, &rights) < 0 && errno != ENOSYS)
|
|
err(1, "unable to limit rights for %s", *av);
|
|
cap_rights_init(&rights);
|
|
if ((cap_rights_limit(STDIN_FILENO, &rights) < 0 && errno != ENOSYS) ||
|
|
caph_limit_stdout() < 0 || caph_limit_stderr() < 0) {
|
|
err(1, "unable to limit rights for stdio");
|
|
}
|
|
if (caph_enter() < 0)
|
|
err(1, "unable to enter capability mode");
|
|
e = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fd, 0);
|
|
if (e == MAP_FAILED)
|
|
err(1, NULL);
|
|
if (!IS_ELF(*(Elf32_Ehdr *)e))
|
|
errx(1, "not an elf file");
|
|
phoff = elf_get_off(e, e, E_PHOFF);
|
|
shoff = elf_get_off(e, e, E_SHOFF);
|
|
phentsize = elf_get_quarter(e, e, E_PHENTSIZE);
|
|
phnum = elf_get_quarter(e, e, E_PHNUM);
|
|
shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
|
|
p = (char *)e + phoff;
|
|
if (shoff > 0) {
|
|
sh = (char *)e + shoff;
|
|
shnum = elf_get_shnum(e, sh);
|
|
shstrndx = elf_get_shstrndx(e, sh);
|
|
offset = elf_get_off(e, (char *)sh + shstrndx * shentsize,
|
|
SH_OFFSET);
|
|
shstrtab = (char *)e + offset;
|
|
} else {
|
|
sh = NULL;
|
|
shnum = 0;
|
|
shstrndx = 0;
|
|
shstrtab = NULL;
|
|
}
|
|
for (i = 0; (u_int64_t)i < shnum; i++) {
|
|
name = elf_get_word(e, (char *)sh + i * shentsize, SH_NAME);
|
|
offset = elf_get_off(e, (char *)sh + i * shentsize, SH_OFFSET);
|
|
if (strcmp(shstrtab + name, ".strtab") == 0)
|
|
strtab = (char *)e + offset;
|
|
if (strcmp(shstrtab + name, ".dynstr") == 0)
|
|
dynstr = (char *)e + offset;
|
|
}
|
|
if (flags & ED_EHDR)
|
|
elf_print_ehdr(e, sh);
|
|
if (flags & ED_PHDR)
|
|
elf_print_phdr(e, p);
|
|
if (flags & ED_SHDR)
|
|
elf_print_shdr(e, sh);
|
|
for (i = 0; (u_int64_t)i < phnum; i++) {
|
|
v = (char *)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; (u_int64_t)i < shnum; i++) {
|
|
v = (char *)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.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;
|
|
}
|
|
|
|
static void
|
|
elf_print_ehdr(Elf32_Ehdr *e, void *sh)
|
|
{
|
|
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);
|
|
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]);
|
|
fprintf(out, "\te_machine: %s\n", e_machines(machine));
|
|
fprintf(out, "\te_version: %s\n", ei_versions[version]);
|
|
fprintf(out, "\te_entry: %#jx\n", (intmax_t)entry);
|
|
fprintf(out, "\te_phoff: %jd\n", (intmax_t)phoff);
|
|
fprintf(out, "\te_shoff: %jd\n", (intmax_t)shoff);
|
|
fprintf(out, "\te_flags: %jd\n", (intmax_t)flags);
|
|
fprintf(out, "\te_ehsize: %jd\n", (intmax_t)ehsize);
|
|
fprintf(out, "\te_phentsize: %jd\n", (intmax_t)phentsize);
|
|
fprintf(out, "\te_phnum: %jd\n", (intmax_t)phnum);
|
|
fprintf(out, "\te_shentsize: %jd\n", (intmax_t)shentsize);
|
|
if (sh != NULL) {
|
|
shnum = elf_get_shnum(e, sh);
|
|
shstrndx = elf_get_shstrndx(e, sh);
|
|
fprintf(out, "\te_shnum: %jd\n", (intmax_t)shnum);
|
|
fprintf(out, "\te_shstrndx: %jd\n", (intmax_t)shstrndx);
|
|
}
|
|
}
|
|
|
|
static void
|
|
elf_print_phdr(Elf32_Ehdr *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; (u_int64_t)i < phnum; i++) {
|
|
v = (char *)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: %jd\n", (intmax_t)offset);
|
|
fprintf(out, "\tp_vaddr: %#jx\n", (intmax_t)vaddr);
|
|
fprintf(out, "\tp_paddr: %#jx\n", (intmax_t)paddr);
|
|
fprintf(out, "\tp_filesz: %jd\n", (intmax_t)filesz);
|
|
fprintf(out, "\tp_memsz: %jd\n", (intmax_t)memsz);
|
|
fprintf(out, "\tp_flags: %s\n", p_flags[flags]);
|
|
fprintf(out, "\tp_align: %jd\n", (intmax_t)align);
|
|
}
|
|
}
|
|
|
|
static void
|
|
elf_print_shdr(Elf32_Ehdr *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 shlink;
|
|
u_int64_t info;
|
|
u_int64_t addralign;
|
|
u_int64_t entsize;
|
|
u_int64_t machine;
|
|
void *v;
|
|
int i;
|
|
|
|
if (sh == NULL) {
|
|
fprintf(out, "\nNo section headers\n");
|
|
return;
|
|
}
|
|
|
|
machine = elf_get_quarter(e, e, E_MACHINE);
|
|
shentsize = elf_get_quarter(e, e, E_SHENTSIZE);
|
|
shnum = elf_get_shnum(e, sh);
|
|
fprintf(out, "\nsection header:\n");
|
|
for (i = 0; (u_int64_t)i < shnum; i++) {
|
|
v = (char *)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);
|
|
shlink = 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(machine, type));
|
|
fprintf(out, "\tsh_flags: %s\n", sh_flags[flags & 0x7]);
|
|
fprintf(out, "\tsh_addr: %#jx\n", addr);
|
|
fprintf(out, "\tsh_offset: %jd\n", (intmax_t)offset);
|
|
fprintf(out, "\tsh_size: %jd\n", (intmax_t)size);
|
|
fprintf(out, "\tsh_link: %jd\n", (intmax_t)shlink);
|
|
fprintf(out, "\tsh_info: %jd\n", (intmax_t)info);
|
|
fprintf(out, "\tsh_addralign: %jd\n", (intmax_t)addralign);
|
|
fprintf(out, "\tsh_entsize: %jd\n", (intmax_t)entsize);
|
|
}
|
|
}
|
|
|
|
static void
|
|
elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str)
|
|
{
|
|
u_int64_t machine;
|
|
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;
|
|
|
|
machine = elf_get_quarter(e, e, E_MACHINE);
|
|
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 = (char *)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: %#jx\n", value);
|
|
fprintf(out, "\tst_size: %jd\n", (intmax_t)size);
|
|
fprintf(out, "\tst_info: %s %s\n",
|
|
st_type(machine, ELF32_ST_TYPE(info)),
|
|
st_bindings[ELF32_ST_BIND(info)]);
|
|
fprintf(out, "\tst_shndx: %jd\n", (intmax_t)shndx);
|
|
}
|
|
}
|
|
|
|
static void
|
|
elf_print_dynamic(Elf32_Ehdr *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; (u_int64_t)i < size / entsize; i++) {
|
|
d = (char *)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: %jd\n", (intmax_t)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: %#jx\n", ptr);
|
|
break;
|
|
case DT_NULL:
|
|
case DT_SYMBOLIC:
|
|
case DT_DEBUG:
|
|
case DT_TEXTREL:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
elf_print_rela(Elf32_Ehdr *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 = (char *)e + offset;
|
|
fprintf(out, "\nrelocation with addend (%s):\n", shstrtab + name);
|
|
for (i = 0; (u_int64_t)i < size / entsize; i++) {
|
|
ra = (char *)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: %#jx\n", offset);
|
|
fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
|
|
fprintf(out, "\tr_addend: %jd\n", (intmax_t)addend);
|
|
}
|
|
}
|
|
|
|
static void
|
|
elf_print_rel(Elf32_Ehdr *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 = (char *)e + offset;
|
|
fprintf(out, "\nrelocation (%s):\n", shstrtab + name);
|
|
for (i = 0; (u_int64_t)i < size / entsize; i++) {
|
|
r = (char *)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: %#jx\n", offset);
|
|
fprintf(out, "\tr_info: %jd\n", (intmax_t)info);
|
|
}
|
|
}
|
|
|
|
static void
|
|
elf_print_interp(Elf32_Ehdr *e, void *p)
|
|
{
|
|
u_int64_t offset;
|
|
char *s;
|
|
|
|
offset = elf_get_off(e, p, P_OFFSET);
|
|
s = (char *)e + offset;
|
|
fprintf(out, "\ninterp:\n");
|
|
fprintf(out, "\t%s\n", s);
|
|
}
|
|
|
|
static void
|
|
elf_print_got(Elf32_Ehdr *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 = (char *)e + offset;
|
|
fprintf(out, "\nglobal offset table:\n");
|
|
for (i = 0; (u_int64_t)i < size / addralign; i++) {
|
|
addr = elf_get_addr(e, (char *)v + i * addralign, 0);
|
|
fprintf(out, "\n");
|
|
fprintf(out, "entry: %d\n", i);
|
|
fprintf(out, "\t%#jx\n", addr);
|
|
}
|
|
}
|
|
|
|
static void
|
|
elf_print_hash(Elf32_Ehdr *e __unused, void *sh __unused)
|
|
{
|
|
}
|
|
|
|
static void
|
|
elf_print_note(Elf32_Ehdr *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 desc;
|
|
char *n, *s;
|
|
|
|
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 = (char *)e + offset;
|
|
fprintf(out, "\nnote (%s):\n", shstrtab + name);
|
|
while (n < ((char *)e + offset + size)) {
|
|
namesz = elf_get_word(e, n, N_NAMESZ);
|
|
descsz = elf_get_word(e, n, N_DESCSZ);
|
|
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;
|
|
}
|
|
}
|
|
|
|
static u_int64_t
|
|
elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member)
|
|
{
|
|
u_int64_t val;
|
|
|
|
val = 0;
|
|
switch (e->e_ident[EI_CLASS]) {
|
|
case ELFCLASS32:
|
|
val = ((uint8_t *)base)[elf32_offsets[member]];
|
|
break;
|
|
case ELFCLASS64:
|
|
val = ((uint8_t *)base)[elf64_offsets[member]];
|
|
break;
|
|
case ELFCLASSNONE:
|
|
errx(1, "invalid class");
|
|
}
|
|
|
|
return val;
|
|
}
|
|
|
|
static u_int64_t
|
|
elf_get_quarter(Elf32_Ehdr *e, void *base, elf_member_t member)
|
|
{
|
|
u_int64_t val;
|
|
|
|
val = 0;
|
|
switch (e->e_ident[EI_CLASS]) {
|
|
case ELFCLASS32:
|
|
base = (char *)base + elf32_offsets[member];
|
|
switch (e->e_ident[EI_DATA]) {
|
|
case ELFDATA2MSB:
|
|
val = be16dec(base);
|
|
break;
|
|
case ELFDATA2LSB:
|
|
val = le16dec(base);
|
|
break;
|
|
case ELFDATANONE:
|
|
errx(1, "invalid data format");
|
|
}
|
|
break;
|
|
case ELFCLASS64:
|
|
base = (char *)base + elf64_offsets[member];
|
|
switch (e->e_ident[EI_DATA]) {
|
|
case ELFDATA2MSB:
|
|
val = be16dec(base);
|
|
break;
|
|
case ELFDATA2LSB:
|
|
val = le16dec(base);
|
|
break;
|
|
case ELFDATANONE:
|
|
errx(1, "invalid data format");
|
|
}
|
|
break;
|
|
case ELFCLASSNONE:
|
|
errx(1, "invalid class");
|
|
}
|
|
|
|
return val;
|
|
}
|
|
|
|
#if 0
|
|
static u_int64_t
|
|
elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member)
|
|
{
|
|
u_int64_t val;
|
|
|
|
val = 0;
|
|
switch (e->e_ident[EI_CLASS]) {
|
|
case ELFCLASS32:
|
|
base = (char *)base + elf32_offsets[member];
|
|
switch (e->e_ident[EI_DATA]) {
|
|
case ELFDATA2MSB:
|
|
val = be16dec(base);
|
|
break;
|
|
case ELFDATA2LSB:
|
|
val = le16dec(base);
|
|
break;
|
|
case ELFDATANONE:
|
|
errx(1, "invalid data format");
|
|
}
|
|
break;
|
|
case ELFCLASS64:
|
|
base = (char *)base + elf64_offsets[member];
|
|
switch (e->e_ident[EI_DATA]) {
|
|
case ELFDATA2MSB:
|
|
val = be32dec(base);
|
|
break;
|
|
case ELFDATA2LSB:
|
|
val = le32dec(base);
|
|
break;
|
|
case ELFDATANONE:
|
|
errx(1, "invalid data format");
|
|
}
|
|
break;
|
|
case ELFCLASSNONE:
|
|
errx(1, "invalid class");
|
|
}
|
|
|
|
return val;
|
|
}
|
|
#endif
|
|
|
|
static u_int64_t
|
|
elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member)
|
|
{
|
|
u_int64_t val;
|
|
|
|
val = 0;
|
|
switch (e->e_ident[EI_CLASS]) {
|
|
case ELFCLASS32:
|
|
base = (char *)base + elf32_offsets[member];
|
|
switch (e->e_ident[EI_DATA]) {
|
|
case ELFDATA2MSB:
|
|
val = be32dec(base);
|
|
break;
|
|
case ELFDATA2LSB:
|
|
val = le32dec(base);
|
|
break;
|
|
case ELFDATANONE:
|
|
errx(1, "invalid data format");
|
|
}
|
|
break;
|
|
case ELFCLASS64:
|
|
base = (char *)base + elf64_offsets[member];
|
|
switch (e->e_ident[EI_DATA]) {
|
|
case ELFDATA2MSB:
|
|
val = be32dec(base);
|
|
break;
|
|
case ELFDATA2LSB:
|
|
val = le32dec(base);
|
|
break;
|
|
case ELFDATANONE:
|
|
errx(1, "invalid data format");
|
|
}
|
|
break;
|
|
case ELFCLASSNONE:
|
|
errx(1, "invalid class");
|
|
}
|
|
|
|
return val;
|
|
}
|
|
|
|
static u_int64_t
|
|
elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member)
|
|
{
|
|
u_int64_t val;
|
|
|
|
val = 0;
|
|
switch (e->e_ident[EI_CLASS]) {
|
|
case ELFCLASS32:
|
|
base = (char *)base + elf32_offsets[member];
|
|
switch (e->e_ident[EI_DATA]) {
|
|
case ELFDATA2MSB:
|
|
val = be32dec(base);
|
|
break;
|
|
case ELFDATA2LSB:
|
|
val = le32dec(base);
|
|
break;
|
|
case ELFDATANONE:
|
|
errx(1, "invalid data format");
|
|
}
|
|
break;
|
|
case ELFCLASS64:
|
|
base = (char *)base + elf64_offsets[member];
|
|
switch (e->e_ident[EI_DATA]) {
|
|
case ELFDATA2MSB:
|
|
val = be64dec(base);
|
|
break;
|
|
case ELFDATA2LSB:
|
|
val = le64dec(base);
|
|
break;
|
|
case ELFDATANONE:
|
|
errx(1, "invalid data format");
|
|
}
|
|
break;
|
|
case ELFCLASSNONE:
|
|
errx(1, "invalid class");
|
|
}
|
|
|
|
return val;
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
fprintf(stderr, "usage: elfdump -a | -cdeGhinprs [-w file] file\n");
|
|
exit(1);
|
|
}
|