diff options
Diffstat (limited to 'usr.bin/elfdump/elfdump.c')
| -rw-r--r-- | usr.bin/elfdump/elfdump.c | 1110 |
1 files changed, 1110 insertions, 0 deletions
diff --git a/usr.bin/elfdump/elfdump.c b/usr.bin/elfdump/elfdump.c new file mode 100644 index 0000000..99ae8bf --- /dev/null +++ b/usr.bin/elfdump/elfdump.c @@ -0,0 +1,1110 @@ +/*- + * Copyright (c) 2003 David O'Brien. All rights reserved. + * Copyright (c) 2001 Jake Burkholder + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <sys/elf32.h> +#include <sys/elf64.h> +#include <sys/endian.h> +#include <sys/mman.h> +#include <sys/stat.h> +#include <err.h> +#include <fcntl.h> +#include <inttypes.h> +#include <stddef.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#define ED_DYN (1<<0) +#define ED_EHDR (1<<1) +#define ED_GOT (1<<2) +#define ED_HASH (1<<3) +#define ED_INTERP (1<<4) +#define ED_NOTE (1<<5) +#define ED_PHDR (1<<6) +#define ED_REL (1<<7) +#define ED_SHDR (1<<8) +#define ED_SYMTAB (1<<9) +#define ED_ALL ((1<<10)-1) + +#define elf_get_addr elf_get_quad +#define elf_get_off elf_get_quad +#define elf_get_size elf_get_quad + +enum elf_member { + D_TAG = 1, D_PTR, D_VAL, + + E_CLASS, E_DATA, E_OSABI, E_TYPE, E_MACHINE, E_VERSION, E_ENTRY, + E_PHOFF, E_SHOFF, E_FLAGS, E_EHSIZE, E_PHENTSIZE, E_PHNUM, E_SHENTSIZE, + E_SHNUM, E_SHSTRNDX, + + N_NAMESZ, N_DESCSZ, N_TYPE, + + P_TYPE, P_OFFSET, P_VADDR, P_PADDR, P_FILESZ, P_MEMSZ, P_FLAGS, + P_ALIGN, + + SH_NAME, SH_TYPE, SH_FLAGS, SH_ADDR, SH_OFFSET, SH_SIZE, SH_LINK, + SH_INFO, SH_ADDRALIGN, SH_ENTSIZE, + + ST_NAME, ST_VALUE, ST_SIZE, ST_INFO, ST_SHNDX, + + R_OFFSET, R_INFO, + + RA_OFFSET, RA_INFO, RA_ADDEND +}; + +typedef enum elf_member elf_member_t; + +int elf32_offsets[] = { + 0, + + offsetof(Elf32_Dyn, d_tag), offsetof(Elf32_Dyn, d_un.d_ptr), + offsetof(Elf32_Dyn, d_un.d_val), + + offsetof(Elf32_Ehdr, e_ident[EI_CLASS]), + offsetof(Elf32_Ehdr, e_ident[EI_DATA]), + offsetof(Elf32_Ehdr, e_ident[EI_OSABI]), + offsetof(Elf32_Ehdr, e_type), offsetof(Elf32_Ehdr, e_machine), + offsetof(Elf32_Ehdr, e_version), offsetof(Elf32_Ehdr, e_entry), + offsetof(Elf32_Ehdr, e_phoff), offsetof(Elf32_Ehdr, e_shoff), + offsetof(Elf32_Ehdr, e_flags), offsetof(Elf32_Ehdr, e_ehsize), + offsetof(Elf32_Ehdr, e_phentsize), offsetof(Elf32_Ehdr, e_phnum), + offsetof(Elf32_Ehdr, e_shentsize), offsetof(Elf32_Ehdr, e_shnum), + offsetof(Elf32_Ehdr, e_shstrndx), + + offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz), + offsetof(Elf_Note, n_type), + + offsetof(Elf32_Phdr, p_type), offsetof(Elf32_Phdr, p_offset), + offsetof(Elf32_Phdr, p_vaddr), offsetof(Elf32_Phdr, p_paddr), + offsetof(Elf32_Phdr, p_filesz), offsetof(Elf32_Phdr, p_memsz), + offsetof(Elf32_Phdr, p_flags), offsetof(Elf32_Phdr, p_align), + + offsetof(Elf32_Shdr, sh_name), offsetof(Elf32_Shdr, sh_type), + offsetof(Elf32_Shdr, sh_flags), offsetof(Elf32_Shdr, sh_addr), + offsetof(Elf32_Shdr, sh_offset), offsetof(Elf32_Shdr, sh_size), + offsetof(Elf32_Shdr, sh_link), offsetof(Elf32_Shdr, sh_info), + offsetof(Elf32_Shdr, sh_addralign), offsetof(Elf32_Shdr, sh_entsize), + + offsetof(Elf32_Sym, st_name), offsetof(Elf32_Sym, st_value), + offsetof(Elf32_Sym, st_size), offsetof(Elf32_Sym, st_info), + offsetof(Elf32_Sym, st_shndx), + + offsetof(Elf32_Rel, r_offset), offsetof(Elf32_Rel, r_info), + + offsetof(Elf32_Rela, r_offset), offsetof(Elf32_Rela, r_info), + offsetof(Elf32_Rela, r_addend) +}; + +int elf64_offsets[] = { + 0, + + offsetof(Elf64_Dyn, d_tag), offsetof(Elf64_Dyn, d_un.d_ptr), + offsetof(Elf64_Dyn, d_un.d_val), + + offsetof(Elf32_Ehdr, e_ident[EI_CLASS]), + offsetof(Elf32_Ehdr, e_ident[EI_DATA]), + offsetof(Elf32_Ehdr, e_ident[EI_OSABI]), + offsetof(Elf64_Ehdr, e_type), offsetof(Elf64_Ehdr, e_machine), + offsetof(Elf64_Ehdr, e_version), offsetof(Elf64_Ehdr, e_entry), + offsetof(Elf64_Ehdr, e_phoff), offsetof(Elf64_Ehdr, e_shoff), + offsetof(Elf64_Ehdr, e_flags), offsetof(Elf64_Ehdr, e_ehsize), + offsetof(Elf64_Ehdr, e_phentsize), offsetof(Elf64_Ehdr, e_phnum), + offsetof(Elf64_Ehdr, e_shentsize), offsetof(Elf64_Ehdr, e_shnum), + offsetof(Elf64_Ehdr, e_shstrndx), + + offsetof(Elf_Note, n_namesz), offsetof(Elf_Note, n_descsz), + offsetof(Elf_Note, n_type), + + offsetof(Elf64_Phdr, p_type), offsetof(Elf64_Phdr, p_offset), + offsetof(Elf64_Phdr, p_vaddr), offsetof(Elf64_Phdr, p_paddr), + offsetof(Elf64_Phdr, p_filesz), offsetof(Elf64_Phdr, p_memsz), + offsetof(Elf64_Phdr, p_flags), offsetof(Elf64_Phdr, p_align), + + offsetof(Elf64_Shdr, sh_name), offsetof(Elf64_Shdr, sh_type), + offsetof(Elf64_Shdr, sh_flags), offsetof(Elf64_Shdr, sh_addr), + offsetof(Elf64_Shdr, sh_offset), offsetof(Elf64_Shdr, sh_size), + offsetof(Elf64_Shdr, sh_link), offsetof(Elf64_Shdr, sh_info), + offsetof(Elf64_Shdr, sh_addralign), offsetof(Elf64_Shdr, sh_entsize), + + offsetof(Elf64_Sym, st_name), offsetof(Elf64_Sym, st_value), + offsetof(Elf64_Sym, st_size), offsetof(Elf64_Sym, st_info), + offsetof(Elf64_Sym, st_shndx), + + offsetof(Elf64_Rel, r_offset), offsetof(Elf64_Rel, r_info), + + offsetof(Elf64_Rela, r_offset), offsetof(Elf64_Rela, r_info), + offsetof(Elf64_Rela, r_addend) +}; + +/* http://www.sco.com/developers/gabi/latest/ch5.dynamic.html#tag_encodings */ +static const char * +d_tags(u_int64_t tag) { + switch (tag) { + case 0: return "DT_NULL"; + case 1: return "DT_NEEDED"; + case 2: return "DT_PLTRELSZ"; + case 3: return "DT_PLTGOT"; + case 4: return "DT_HASH"; + case 5: return "DT_STRTAB"; + case 6: return "DT_SYMTAB"; + case 7: return "DT_RELA"; + case 8: return "DT_RELASZ"; + case 9: return "DT_RELAENT"; + case 10: return "DT_STRSZ"; + case 11: return "DT_SYMENT"; + case 12: return "DT_INIT"; + case 13: return "DT_FINI"; + case 14: return "DT_SONAME"; + case 15: return "DT_RPATH"; + case 16: return "DT_SYMBOLIC"; + case 17: return "DT_REL"; + case 18: return "DT_RELSZ"; + case 19: return "DT_RELENT"; + case 20: return "DT_PLTREL"; + case 21: return "DT_DEBUG"; + case 22: return "DT_TEXTREL"; + case 23: return "DT_JMPREL"; + case 24: return "DT_BIND_NOW"; + case 25: return "DT_INIT_ARRAY"; + case 26: return "DT_FINI_ARRAY"; + case 27: return "DT_INIT_ARRAYSZ"; + case 28: return "DT_FINI_ARRAYSZ"; + case 29: return "DT_RUNPATH"; + case 30: return "DT_FLAGS"; + case 32: return "DT_PREINIT_ARRAY"; /* XXX: DT_ENCODING */ + case 33: return "DT_PREINIT_ARRAYSZ"; + /* 0x6000000D - 0x6ffff000 operating system-specific semantics */ + case 0x6ffffdf5: return "DT_GNU_PRELINKED"; + case 0x6ffffdf6: return "DT_GNU_CONFLICTSZ"; + case 0x6ffffdf7: return "DT_GNU_LIBLISTSZ"; + case 0x6ffffdf8: return "DT_SUNW_CHECKSUM"; + case 0x6ffffdf9: return "DT_PLTPADSZ"; + case 0x6ffffdfa: return "DT_MOVEENT"; + case 0x6ffffdfb: return "DT_MOVESZ"; + case 0x6ffffdfc: return "DT_FEATURE"; + case 0x6ffffdfd: return "DT_POSFLAG_1"; + case 0x6ffffdfe: return "DT_SYMINSZ"; + case 0x6ffffdff: return "DT_SYMINENT (DT_VALRNGHI)"; + case 0x6ffffe00: return "DT_ADDRRNGLO"; + case 0x6ffffef8: return "DT_GNU_CONFLICT"; + case 0x6ffffef9: return "DT_GNU_LIBLIST"; + case 0x6ffffefa: return "DT_SUNW_CONFIG"; + case 0x6ffffefb: return "DT_SUNW_DEPAUDIT"; + case 0x6ffffefc: return "DT_SUNW_AUDIT"; + case 0x6ffffefd: return "DT_SUNW_PLTPAD"; + case 0x6ffffefe: return "DT_SUNW_MOVETAB"; + case 0x6ffffeff: return "DT_SYMINFO (DT_ADDRRNGHI)"; + case 0x6ffffff9: return "DT_RELACOUNT"; + case 0x6ffffffa: return "DT_RELCOUNT"; + case 0x6ffffffb: return "DT_FLAGS_1"; + case 0x6ffffffc: return "DT_VERDEF"; + case 0x6ffffffd: return "DT_VERDEFNUM"; + case 0x6ffffffe: return "DT_VERNEED"; + case 0x6fffffff: return "DT_VERNEEDNUM"; + case 0x6ffffff0: return "DT_GNU_VERSYM"; + /* 0x70000000 - 0x7fffffff processor-specific semantics */ + case 0x70000000: return "DT_IA_64_PLT_RESERVE"; + case 0x7ffffffd: return "DT_SUNW_AUXILIARY"; + case 0x7ffffffe: return "DT_SUNW_USED"; + case 0x7fffffff: return "DT_SUNW_FILTER"; + default: return "ERROR: TAG NOT DEFINED"; + } +} + +static const char * +e_machines(u_int mach) +{ + static char machdesc[64]; + + switch (mach) { + case EM_NONE: return "EM_NONE"; + case EM_M32: return "EM_M32"; + case EM_SPARC: return "EM_SPARC"; + case EM_386: return "EM_386"; + case EM_68K: return "EM_68K"; + case EM_88K: return "EM_88K"; + case EM_860: return "EM_860"; + case EM_MIPS: return "EM_MIPS"; + case EM_PPC: return "EM_PPC"; + case EM_ARM: return "EM_ARM"; + case EM_ALPHA: return "EM_ALPHA (legacy)"; + case EM_SPARCV9:return "EM_SPARCV9"; + case EM_IA_64: return "EM_IA_64"; + case EM_X86_64: return "EM_X86_64"; + } + snprintf(machdesc, sizeof(machdesc), + "(unknown machine) -- type 0x%x", mach); + return (machdesc); +} + +const char *e_types[] = { + "ET_NONE", "ET_REL", "ET_EXEC", "ET_DYN", "ET_CORE" +}; + +const char *ei_versions[] = { + "EV_NONE", "EV_CURRENT" +}; + +const char *ei_classes[] = { + "ELFCLASSNONE", "ELFCLASS32", "ELFCLASS64" +}; + +const char *ei_data[] = { + "ELFDATANONE", "ELFDATA2LSB", "ELFDATA2MSB" +}; + +const char *ei_abis[256] = { + "ELFOSABI_SYSV", "ELFOSABI_HPUX", "ELFOSABI_NETBSD", "ELFOSABI_LINUX", + "ELFOSABI_HURD", "ELFOSABI_86OPEN", "ELFOSABI_SOLARIS", "ELFOSABI_AIX", + "ELFOSABI_IRIX", "ELFOSABI_FREEBSD", "ELFOSABI_TRU64", + "ELFOSABI_MODESTO", "ELFOSABI_OPENBSD", + [255] = "ELFOSABI_STANDALONE" +}; + +const char *p_types[] = { + "PT_NULL", "PT_LOAD", "PT_DYNAMIC", "PT_INTERP", "PT_NOTE", + "PT_SHLIB", "PT_PHDR", "PT_TLS" +}; + +const char *p_flags[] = { + "", "PF_X", "PF_W", "PF_X|PF_W", "PF_R", "PF_X|PF_R", "PF_W|PF_R", + "PF_X|PF_W|PF_R" +}; + +/* http://www.sco.com/developers/gabi/latest/ch4.sheader.html#sh_type */ +static const char * +sh_types(u_int64_t sht) { + switch (sht) { + case 0: return "SHT_NULL"; + case 1: return "SHT_PROGBITS"; + case 2: return "SHT_SYMTAB"; + case 3: return "SHT_STRTAB"; + case 4: return "SHT_RELA"; + case 5: return "SHT_HASH"; + case 6: return "SHT_DYNAMIC"; + case 7: return "SHT_NOTE"; + case 8: return "SHT_NOBITS"; + case 9: return "SHT_REL"; + case 10: return "SHT_SHLIB"; + case 11: return "SHT_DYNSYM"; + case 14: return "SHT_INIT_ARRAY"; + case 15: return "SHT_FINI_ARRAY"; + case 16: return "SHT_PREINIT_ARRAY"; + case 17: return "SHT_GROUP"; + case 18: return "SHT_SYMTAB_SHNDX"; + /* 0x60000000 - 0x6fffffff operating system-specific semantics */ + case 0x6ffffff0: return "XXX:VERSYM"; + case 0x6ffffff4: return "SHT_SUNW_dof"; + case 0x6ffffff7: return "SHT_GNU_LIBLIST"; + case 0x6ffffffc: return "XXX:VERDEF"; + case 0x6ffffffd: return "SHT_SUNW(GNU)_verdef"; + case 0x6ffffffe: return "SHT_SUNW(GNU)_verneed"; + case 0x6fffffff: return "SHT_SUNW(GNU)_versym"; + /* 0x70000000 - 0x7fffffff processor-specific semantics */ + case 0x70000000: return "SHT_IA_64_EXT"; + case 0x70000001: return "SHT_IA_64_UNWIND"; + case 0x7ffffffd: return "XXX:AUXILIARY"; + case 0x7fffffff: return "XXX:FILTER"; + /* 0x80000000 - 0xffffffff application programs */ + default: return "ERROR: SHT NOT DEFINED"; + } +} + +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" +}; + +const char *st_types[] = { + "STT_NOTYPE", "STT_OBJECT", "STT_FUNC", "STT_SECTION", "STT_FILE" +}; + +const char *st_bindings[] = { + "STB_LOCAL", "STB_GLOBAL", "STB_WEAK" +}; + +char *dynstr; +char *shstrtab; +char *strtab; +FILE *out; + +u_int64_t elf_get_byte(Elf32_Ehdr *e, void *base, elf_member_t member); +u_int64_t elf_get_quarter(Elf32_Ehdr *e, void *base, elf_member_t member); +u_int64_t elf_get_half(Elf32_Ehdr *e, void *base, elf_member_t member); +u_int64_t elf_get_word(Elf32_Ehdr *e, void *base, elf_member_t member); +u_int64_t elf_get_quad(Elf32_Ehdr *e, void *base, elf_member_t member); + +void elf_print_ehdr(Elf32_Ehdr *e); +void elf_print_phdr(Elf32_Ehdr *e, void *p); +void elf_print_shdr(Elf32_Ehdr *e, void *sh); +void elf_print_symtab(Elf32_Ehdr *e, void *sh, char *str); +void elf_print_dynamic(Elf32_Ehdr *e, void *sh); +void elf_print_rel(Elf32_Ehdr *e, void *r); +void elf_print_rela(Elf32_Ehdr *e, void *ra); +void elf_print_interp(Elf32_Ehdr *e, void *p); +void elf_print_got(Elf32_Ehdr *e, void *sh); +void elf_print_hash(Elf32_Ehdr *e, void *sh); +void elf_print_note(Elf32_Ehdr *e, void *sh); + +void usage(void); + +int +main(int ac, char **av) +{ + 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); + 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); + 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); + shnum = elf_get_quarter(e, e, E_SHNUM); + shstrndx = elf_get_quarter(e, e, E_SHSTRNDX); + p = (char *)e + phoff; + sh = (char *)e + shoff; + offset = elf_get_off(e, (char *)sh + shstrndx * shentsize, SH_OFFSET); + shstrtab = (char *)e + offset; + 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); + 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.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(Elf32_Ehdr *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]); + 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); + fprintf(out, "\te_shnum: %jd\n", (intmax_t)shnum); + fprintf(out, "\te_shstrndx: %jd\n", (intmax_t)shstrndx); +} + +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); + } +} + +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; + 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; (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(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); + } +} + +void +elf_print_symtab(Elf32_Ehdr *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 = (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_types[ELF32_ST_TYPE(info)], + st_bindings[ELF32_ST_BIND(info)]); + fprintf(out, "\tst_shndx: %jd\n", (intmax_t)shndx); + } +} + +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; + } + } +} + +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); + } +} + +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); + } +} + +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); +} + +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); + } +} + +void +elf_print_hash(Elf32_Ehdr *e __unused, void *sh __unused) +{ +} + +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; + } +} + +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; +} + +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; +} + +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; +} + +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; +} + +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; +} + +void +usage(void) +{ + fprintf(stderr, "usage: elfdump -a | -cdeGhinprs [-w file] file\n"); + exit(1); +} |
