Revision 3b38b32b45e7aac29c52a27b7c0de70c536cd62c authored by Edward Tomasz Napierala on 22 January 2010, 11:42:44 UTC, committed by Edward Tomasz Napierala on 22 January 2010, 11:42:44 UTC
Fix permission handling for extended attributes in ZFS. Without this change, ZFS uses SunOS Alternate Data Streams semantics - each EA has its own permissions, which are set at EA creation time and - unlike SunOS - invisible to the user and impossible to change. From the user point of view, it's just broken: sometimes access is granted when it shouldn't be, sometimes it's denied when it shouldn't be. This patch makes it behave just like UFS, i.e. depend on current file permissions. Also, it fixes returned error codes (ENOATTR instead of ENOENT) and makes listextattr(2) return 0 instead of EPERM where there is no EA directory (i.e. the file never had any EA). Tested by: cperciva
1 parent 27b85a8
elfdump.c
/*-
* 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[] = {
"ELFOSABI_SYSV", "ELFOSABI_HPUX", "ELFOSABI_NETBSD", "ELFOSABI_LINUX",
"ELFOSABI_HURD", "ELFOSABI_86OPEN", "ELFOSABI_SOLARIS",
"ELFOSABI_MONTEREY", "ELFOSABI_IRIX", "ELFOSABI_FREEBSD",
"ELFOSABI_TRU64", "ELFOSABI_MODESTO", "ELFOSABI_OPENBSD"
};
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 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 type;
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);
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;
val = 0;
switch (e->e_ident[EI_CLASS]) {
case ELFCLASS32:
val = ((char *)base)[elf32_offsets[member]];
break;
case ELFCLASS64:
val = ((char *)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);
}
Computing file changes ...
