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binutils-gdb/binutils/readelf.c
Nick Clifton cb436f39aa Improved portability of readelf
1998-06-30 00:03:05 +00:00

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/* readelf.c -- display contents of an ELF format file
Copyright (C) 1998 Free Software Foundation, Inc.
Originally developed by Eric Youngdale <eric@andante.jic.com>
Modifications by Nick Clifton <nickc@cygnus.com>
This file is part of GNU Binutils.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
#include <assert.h>
#include <sys/stat.h>
#include <stdio.h>
#include "bfd.h"
#include "elf/common.h"
#include "elf/ppc.h"
#include "elf/m32r.h"
#include "elf/mips.h"
#include "elf/external.h"
#include "elf/internal.h"
#include "bucomm.h"
#include "getopt.h"
#ifdef ANSI_PROTOTYPES
#include <stdarg.h>
#else
#include <varargs.h>
#endif
char * program_name = "readelf";
unsigned int dynamic_addr;
unsigned int dynamic_size;
unsigned int rela_addr;
unsigned int rela_size;
char * dynamic_strings;
char * string_table;
Elf_Internal_Sym * dynamic_symbols;
char program_interpreter [64];
int dynamic_info [DT_JMPREL + 1];
int version_info [16];
int loadaddr = 0;
Elf_Internal_Ehdr elf_header;
Elf_Internal_Shdr * section_headers;
int show_name;
int do_dynamic;
int do_syms;
int do_reloc;
int do_sections;
int do_segments;
int do_using_dynamic;
int do_header;
int do_dump;
int do_version;
static unsigned long int (* byte_get)(unsigned char *, int);
#define NUM_DUMP_SECTS 100
char dump_sects [NUM_DUMP_SECTS];
#define HEX_DUMP 1
#define DISASS_DUMP 2
/* Forward declarations for dumb compilers. */
static char * get_dynamic_type PARAMS ((unsigned long));
static char * get_i386_rel_type PARAMS ((unsigned long rtype));
static char * get_m68k_rel_type PARAMS ((unsigned long rtype));
static char * get_sparc_rel_type PARAMS ((unsigned long rtype));
static char * get_m32r_rel_type PARAMS ((unsigned long rtype));
static char * get_v850_rel_type PARAMS ((unsigned long rtype));
static char * get_d10v_rel_type PARAMS ((unsigned long rtype));
/* start-sanitize-d30v */
static char * get_d30v_rel_type PARAMS ((unsigned long rtype));
/* end-sanitize-d30v */
static char * get_sh_rel_type PARAMS ((unsigned long rtype));
static char * get_mn10300_rel_type PARAMS ((unsigned long rtype));
static char * get_mn10200_rel_type PARAMS ((unsigned long rtype));
static char * get_ppc_rel_type PARAMS ((unsigned long rtype));
static int dump_relocations
PARAMS ((FILE *, unsigned long, unsigned long, Elf_Internal_Sym *, char *));
static char * get_file_type PARAMS ((unsigned e_type));
static char * get_machine_name PARAMS ((unsigned e_machine));
static char * get_machine_data PARAMS ((unsigned e_data));
static char * get_machine_flags PARAMS ((unsigned, unsigned e_machine));
static char * get_segment_type PARAMS ((unsigned long p_type));
static char * get_section_type_name PARAMS ((unsigned int sh_type));
static char * get_symbol_binding PARAMS ((unsigned int binding));
static char * get_symbol_type PARAMS ((unsigned int type));
static void usage PARAMS ((void));
static void parse_args PARAMS ((int argc, char ** argv));
static int process_file_header PARAMS ((void));
static int process_program_headers PARAMS ((FILE *));
static int process_section_headers PARAMS ((FILE *));
static int process_dynamic_segment PARAMS ((FILE *));
static int process_symbol_table PARAMS ((FILE *));
static int process_section_contents PARAMS ((FILE *));
static void process_file PARAMS ((char * file_name));
static int process_relocs PARAMS ((FILE *));
static int process_version_sections PARAMS ((FILE *));
static char * get_ver_flags PARAMS ((unsigned short flags));
static char * get_symbol_index_type PARAMS ((unsigned short type));
static int get_section_headers PARAMS ((FILE * file));
static int get_file_header PARAMS ((FILE * file));
static Elf_Internal_Sym * get_elf_symbols
PARAMS ((FILE * file, unsigned long offset, unsigned long number));
static int * get_dynamic_data PARAMS ((FILE * file, unsigned int number));
#define SECTION_NAME(X) (string_table + (X)->sh_name)
#define DT_VERSIONTAGIDX(tag) (DT_VERNEEDNUM - (tag)) /* Reverse order! */
#define BYTE_GET(field) byte_get (field, sizeof (field))
#define NUM_ELEM(array) (sizeof (array) / sizeof ((array)[0]))
#define GET_DATA_ALLOC(offset, size, var, type, reason) \
if (fseek (file, offset, SEEK_SET)) \
{ \
error (_("Unable to seek to start of %s at %x\n"), reason, offset); \
return 0; \
} \
\
var = (type) malloc (size); \
\
if (var == NULL) \
{ \
error (_("Out of memory allocating %d bytes for %s\n"), size, reason); \
return 0; \
} \
\
if (fread (var, size, 1, file) != 1) \
{ \
error (_("Unable to read in %d bytes of %s\n"), size, reason); \
free (var); \
var = NULL; \
return 0; \
}
#define GET_DATA(offset, var, reason) \
if (fseek (file, offset, SEEK_SET)) \
{ \
error (_("Unable to seek to %x for %s\n"), offset, reason); \
return 0; \
} \
else if (fread (& var, sizeof (var), 1, file) != 1) \
{ \
error (_("Unable to read data at %x for %s\n"), offset, reason); \
return 0; \
}
#ifdef ANSI_PROTOTYPES
static void
error (const char * message, ...)
{
va_list args;
fprintf (stderr, _("%s: Error: "), program_name);
va_start (args, message);
vfprintf (stderr, message, args);
va_end (args);
return;
}
static void
warn (const char * message, ...)
{
va_list args;
fprintf (stderr, _("%s: Warning: "), program_name);
va_start (args, message);
vfprintf (stderr, message, args);
va_end (args);
return;
}
#else
static void
error (va_alist)
{
char * message;
va_list args;
fprintf (stderr, _("%s: Error: "), program_name);
va_start (args);
message = va_arg (args, char *);
vfprintf (stderr, message, args);
va_end (args);
return;
}
static void
warn (va_alist)
va_dcl;
{
char * message;
va_list args;
fprintf (stderr, _("%s: Warning: "), program_name);
va_start (args);
message = va_arg (args, char *);
vfprintf (stderr, message, args);
va_end (args);
return;
}
#endif
static unsigned long int
byte_get_little_endian (field, size)
unsigned char * field;
int size;
{
switch (size)
{
case 1:
return * field;
case 2:
return ((unsigned int) (field [0]))
| (((unsigned int) (field [1])) << 8);
case 4:
return ((unsigned long) (field [0]))
| (((unsigned long) (field [1])) << 8)
| (((unsigned long) (field [2])) << 16)
| (((unsigned long) (field [3])) << 24);
default:
error (_("Unhandled data length: %d\n"), size);
abort();
}
}
static unsigned long int
byte_get_big_endian (field, size)
unsigned char * field;
int size;
{
switch (size)
{
case 1:
return * field;
case 2:
return ((unsigned int) (field [1])) | (((int) (field [0])) << 8);
case 4:
return ((unsigned long) (field [3]))
| (((unsigned long) (field [2])) << 8)
| (((unsigned long) (field [1])) << 16)
| (((unsigned long) (field [0])) << 24);
default:
error (_("Unhandled data length: %d\n"), size);
abort();
}
}
static char *
get_i386_rel_type (rtype)
unsigned long rtype;
{
switch (rtype)
{
case 0: return "R_386_NONE";
case 1: return "R_386_32";
case 2: return "R_386_PC32";
case 3: return "R_386_GOT32";
case 4: return "R_386_PLT32";
case 5: return "R_386_COPY";
case 6: return "R_386_GLOB_DAT";
case 7: return "R_386_JMP_SLOT";
case 8: return "R_386_RELATIVE";
case 9: return "R_386_GOTOFF";
case 10: return "R_386_GOTPC";
case 20: return "R_386_16";
case 21: return "R_386_PC16";
case 22: return "R_386_PC8";
case 23: return "R_386_max";
default: return _("*INVALID*");
}
}
static char *
get_m68k_rel_type (rtype)
unsigned long rtype;
{
switch (rtype)
{
case 0: return "R_68K_NONE";
case 1: return "R_68K_32";
case 2: return "R_68K_16";
case 3: return "R_68K_8";
case 4: return "R_68K_PC32";
case 5: return "R_68K_PC16";
case 6: return "R_68K_PC8";
case 7: return "R_68K_GOT32";
case 8: return "R_68K_GOT16";
case 9: return "R_68K_GOT8";
case 10: return "R_68K_GOT32O";
case 11: return "R_68K_GOT16O";
case 12: return "R_68K_GOT8O";
case 13: return "R_68K_PLT32";
case 14: return "R_68K_PLT16";
case 15: return "R_68K_PLT8";
case 16: return "R_68K_PLT32O";
case 17: return "R_68K_PLT16O";
case 18: return "R_68K_PLT8O";
case 19: return "R_68K_COPY";
case 20: return "R_68K_GLOB_DAT";
case 21: return "R_68K_JMP_SLOT";
case 22: return "R_68K_RELATIVE";
default: return _("*INVALID*");
}
}
static char *
get_sparc_rel_type (rtype)
unsigned long rtype;
{
switch (rtype)
{
case 0: return "R_SPARC_NONE";
case 1: return "R_SPARC_8";
case 2: return "R_SPARC_16";
case 3: return "R_SPARC_32";
case 4: return "R_SPARC_DISP8";
case 5: return "R_SPARC_DISP16";
case 6: return "R_SPARC_DISP32";
case 7: return "R_SPARC_WDISP30";
case 8: return "R_SPARC_WDISP22";
case 9: return "R_SPARC_HI22";
case 10: return "R_SPARC_22";
case 11: return "R_SPARC_13";
case 12: return "R_SPARC_LO10";
case 13: return "R_SPARC_GOT10";
case 14: return "R_SPARC_GOT13";
case 15: return "R_SPARC_GOT22";
case 16: return "R_SPARC_PC10";
case 17: return "R_SPARC_PC22";
case 18: return "R_SPARC_WPLT30";
case 19: return "R_SPARC_COPY";
case 20: return "R_SPARC_GLOB_DAT";
case 21: return "R_SPARC_JMP_SLOT";
case 22: return "R_SPARC_RELATIVE";
case 23: return "R_SPARC_UA32";
case 24: return "R_SPARC_10";
case 25: return "R_SPARC_11";
case 26: return "R_SPARC_64";
case 27: return "R_SPARC_OLO10";
case 28: return "R_SPARC_HH22";
case 29: return "R_SPARC_HM10";
case 30: return "R_SPARC_LM22";
case 31: return "R_SPARC_PC_HH22";
case 32: return "R_SPARC_PC_HM10";
case 33: return "R_SPARC_PC_LM22";
case 34: return "R_SPARC_WDISP16";
case 35: return "R_SPARC_WDISP19";
case 36: return "R_SPARC_UNUSED_42";
case 37: return "R_SPARC_7";
case 38: return "R_SPARC_5";
case 39: return "R_SPARC_6";
case 40: return "R_SPARC_DISP64";
case 41: return "R_SPARC_PLT64";
case 42: return "R_SPARC_HIX22";
case 43: return "R_SPARC_LOX10";
case 44: return "R_SPARC_H44";
case 45: return "R_SPARC_M44";
case 46: return "R_SPARC_L44";
case 47: return "R_SPARC_REGISTER";
case 48: return "R_SPARC_UA64";
case 49: return "R_SPARC_UA16";
case 50: return "R_SPARC_32LE";
default: return _("*INVALID*");
}
}
static char *
get_m32r_rel_type (rtype)
unsigned long rtype;
{
switch (rtype)
{
case 0: return "R_M32R_NONE";
case 1: return "R_M32R_16";
case 2: return "R_M32R_32";
case 3: return "R_M32R_24";
case 4: return "R_M32R_10_PCREL";
case 5: return "R_M32R_18_PCREL";
case 6: return "R_M32R_26_PCREL";
case 7: return "R_M32R_HI16_ULO";
case 8: return "R_M32R_HI16_SLO";
case 9: return "R_M32R_LO16";
case 10: return "R_M32R_SDA16";
default: return _("*INVALID*");
}
}
static char *
get_v850_rel_type (rtype)
unsigned long rtype;
{
switch (rtype)
{
case 0: return "R_V850_NONE";
case 1: return "R_V850_9_PCREL";
case 2: return "R_V850_22_PCREL";
case 3: return "R_V850_HI16_S";
case 4: return "R_V850_HI16";
case 5: return "R_V850_LO16";
case 6: return "R_V850_32";
case 7: return "R_V850_16";
case 8: return "R_V850_8";
case 9: return "R_V850_SDA_16_16_OFFSET";
case 10: return "R_V850_SDA_15_16_OFFSET";
case 11: return "R_V850_ZDA_16_16_OFFSET";
case 12: return "R_V850_ZDA_15_16_OFFSET";
case 13: return "R_V850_TDA_6_8_OFFSET";
case 14: return "R_V850_TDA_7_8_OFFSET";
case 15: return "R_V850_TDA_7_7_OFFSET";
case 16: return "R_V850_TDA_16_16_OFFSET";
/* start-sanitize-v850e */
case 17: return "R_V850_TDA_4_5_OFFSET";
case 18: return "R_V850_TDA_4_4_OFFSET";
case 19: return "R_V850_SDA_16_16_SPLIT_OFFSET";
case 20: return "R_V850_ZDA_16_16_SPLIT_OFFSET";
case 21: return "R_V850_CALLT_6_7_OFFSET";
case 22: return "R_V850_CALLT_16_16_OFFSET";
/* end-sanitize-v850e */
default: return _("*INVALID*");
}
}
static char *
get_d10v_rel_type (rtype)
unsigned long rtype;
{
switch (rtype)
{
case 0: return "R_D10V_NONE";
case 1: return "R_D10V_10_PCREL_R";
case 2: return "R_D10V_10_PCREL_L";
case 3: return "R_D10V_16";
case 4: return "R_D10V_18";
case 5: return "R_D10V_18_PCREL";
case 6: return "R_D10V_32";
default: return _("*INVALID*");
}
}
/* start-sanitize-d30v */
static char *
get_d30v_rel_type (rtype)
unsigned long rtype;
{
switch (rtype)
{
case 0: return "R_D30V_NONE";
case 1: return "R_D30V_6";
case 2: return "R_D30V_9_PCREL";
case 3: return "R_D30V_9_PCREL_R";
case 4: return "R_D30V_15";
case 5: return "R_D30V_15_PCREL";
case 6: return "R_D30V_15_PCREL_R";
case 7: return "R_D30V_21";
case 8: return "R_D30V_21_PCREL";
case 9: return "R_D30V_21_PCREL_R";
case 10: return "R_D30V_32";
case 11: return "R_D30V_32_PCREL";
case 12: return "R_D30V_32_NORMAL";
default: return _("*INVALID*");
}
}
/* end-sanitize-d30v */
static char *
get_sh_rel_type (rtype)
unsigned long rtype;
{
switch (rtype)
{
case 0: return "R_SH_NONE";
case 1: return "R_SH_DIR32";
case 2: return "R_SH_REL32";
case 3: return "R_SH_DIR8WPN";
case 4: return "R_SH_IND12W";
case 5: return "R_SH_DIR8WPL";
case 6: return "R_SH_DIR8WPZ";
case 7: return "R_SH_DIR8BP";
case 8: return "R_SH_DIR8W";
case 9: return "R_SH_DIR8L";
case 25: return "R_SH_SWITCH16";
case 26: return "R_SH_SWITCH32";
case 27: return "R_SH_USES";
case 28: return "R_SH_COUNT";
case 29: return "R_SH_ALIGN";
case 30: return "R_SH_CODE";
case 31: return "R_SH_DATA";
case 32: return "R_SH_LABEL";
default: return _("*INVALID*");
}
}
static char *
get_mn10300_rel_type (rtype)
unsigned long rtype;
{
switch (rtype)
{
case 0: return "R_MN10300_NONE";
case 1: return "R_MN10300_32";
case 2: return "R_MN10300_16";
case 3: return "R_MN10300_8";
case 4: return "R_MN10300_PCREL32";
case 5: return "R_MN10300_PCREL16";
case 6: return "R_MN10300_PCREL8";
default: return _("*INVALID*");
}
}
static char *
get_mn10200_rel_type (rtype)
unsigned long rtype;
{
switch (rtype)
{
case 0: return "R_MN10200_NONE";
case 1: return "R_MN10200_32";
case 2: return "R_MN10200_16";
case 3: return "R_MN10200_8";
case 4: return "R_MN10200_24";
case 5: return "R_MN10200_PCREL8";
case 6: return "R_MN10200_PCREL16";
case 7: return "R_MN10200_PCREL24";
default: return _("*INVALID*");
}
}
static char *
get_ppc_rel_type (rtype)
unsigned long rtype;
{
switch (rtype)
{
case 0: return "R_PPC_NONE,";
case 1: return "R_PPC_ADDR32,";
case 2: return "R_PPC_ADDR24,";
case 3: return "R_PPC_ADDR16,";
case 4: return "R_PPC_ADDR16_LO,";
case 5: return "R_PPC_ADDR16_HI,";
case 6: return "R_PPC_ADDR16_HA,";
case 7: return "R_PPC_ADDR14,";
case 8: return "R_PPC_ADDR14_BRTAKEN,";
case 9: return "R_PPC_ADDR14_BRNTAKEN,";
case 10: return "R_PPC_REL24,";
case 11: return "R_PPC_REL14,";
case 12: return "R_PPC_REL14_BRTAKEN,";
case 13: return "R_PPC_REL14_BRNTAKEN,";
case 14: return "R_PPC_GOT16,";
case 15: return "R_PPC_GOT16_LO,";
case 16: return "R_PPC_GOT16_HI,";
case 17: return "R_PPC_GOT16_HA,";
case 18: return "R_PPC_PLT24,";
case 19: return "R_PPC_COPY,";
case 21: return "R_PPC_JMP_SLOT,";
case 22: return "R_PPC_RELATIVE,";
case 23: return "R_PPC_LOCAL24PC,";
case 24: return "R_PPC_UADDR32,";
case 25: return "R_PPC_UADDR16,";
case 26: return "R_PPC_REL32,";
case 27: return "R_PPC_PLT32,";
case 28: return "R_PPC_PLTREL32,";
case 29: return "R_PPC_PLT16_LO,";
case 30: return "R_PPC_PLT16_HI,";
case 31: return "R_PPC_PLT16_HA,";
case 32: return "R_PPC_SDAREL,";
case 33: return "R_PPC_SECTOFF,";
case 34: return "R_PPC_SECTOFF_LO,";
case 35: return "R_PPC_SECTOFF_HI,";
case 36: return "R_PPC_SECTOFF_HA,";
case 101: return "R_PPC_EMB_NADDR32,";
case 102: return "R_PPC_EMB_NADDR16,";
case 103: return "R_PPC_EMB_NADDR16_LO,";
case 104: return "R_PPC_EMB_NADDR16_HI,";
case 105: return "R_PPC_EMB_NADDR16_HA,";
case 106: return "R_PPC_EMB_SDAI16,";
case 107: return "R_PPC_EMB_SDA2I16,";
case 108: return "R_PPC_EMB_SDA2REL,";
case 109: return "R_PPC_EMB_SDA21,";
case 110: return "R_PPC_EMB_MRKREF,";
case 111: return "R_PPC_EMB_RELSEC16,";
case 112: return "R_PPC_EMB_RELST_LO,";
case 113: return "R_PPC_EMB_RELST_HI,";
case 114: return "R_PPC_EMB_RELST_HA,";
case 115: return "R_PPC_EMB_BIT_FLD,";
case 116: return "R_PPC_EMB_RELSDA,";
default: return _("*INVALID*");
}
}
/* Display the contents of the relocation data
found at the specified offset. */
static int
dump_relocations (file, rel_offset, rel_size, symtab, strtab)
FILE * file;
unsigned long rel_offset;
unsigned long rel_size;
Elf_Internal_Sym * symtab;
char * strtab;
{
unsigned int i;
int is_rela;
Elf_Internal_Rel * rels;
Elf_Internal_Rela * relas;
/* Compute number of relocations and read them in. */
switch (elf_header.e_machine)
{
case EM_386:
case EM_486:
case EM_CYGNUS_M32R:
case EM_CYGNUS_D10V:
{
Elf32_External_Rel * erels;
GET_DATA_ALLOC (rel_offset, rel_size, erels,
Elf32_External_Rel *, "relocs");
rel_size = rel_size / sizeof (Elf32_External_Rel);
rels = (Elf_Internal_Rel *) malloc (rel_size *
sizeof (Elf_Internal_Rel));
for (i = 0; i < rel_size; i++)
{
rels[i].r_offset = BYTE_GET (erels[i].r_offset);
rels[i].r_info = BYTE_GET (erels[i].r_info);
}
free (erels);
is_rela = 0;
relas = (Elf_Internal_Rela *) rels;
}
break;
case EM_68K:
case EM_SPARC:
case EM_PPC:
case EM_CYGNUS_V850:
/* start-sanitize-d30v */
case EM_CYGNUS_D30V:
/* end-sanitize-d30v */
case EM_CYGNUS_MN10200:
case EM_CYGNUS_MN10300:
case EM_SH:
{
Elf32_External_Rela * erelas;
GET_DATA_ALLOC (rel_offset, rel_size, erelas,
Elf32_External_Rela *, "relocs");
rel_size = rel_size / sizeof (Elf32_External_Rela);
relas = (Elf_Internal_Rela *) malloc (rel_size *
sizeof (Elf_Internal_Rela));
for (i = 0; i < rel_size; i++)
{
relas[i].r_offset = BYTE_GET (erelas[i].r_offset);
relas[i].r_info = BYTE_GET (erelas[i].r_info);
relas[i].r_addend = BYTE_GET (erelas[i].r_addend);
}
free (erelas);
is_rela = 1;
rels = (Elf_Internal_Rel *) relas;
}
break;
default:
warn (_("Don't know about relocations on this machine architecture\n"));
return 0;
}
if (is_rela)
printf
(_(" Offset Value Type Symbol's Value Symbol's Name Addend\n"));
else
printf
(_(" Offset Value Type Symbol's Value Symbol's Name\n"));
for (i = 0; i < rel_size; i++)
{
char * rtype;
unsigned long offset;
unsigned long info;
int symtab_index;
if (is_rela)
{
offset = relas [i].r_offset;
info = relas [i].r_info;
}
else
{
offset = rels [i].r_offset;
info = rels [i].r_info;
}
printf (" %8.8lx %5.5lx ", offset, info);
switch (elf_header.e_machine)
{
default:
rtype = "<unknown>";
break;
case EM_CYGNUS_M32R:
rtype = get_m32r_rel_type (ELF32_R_TYPE (info));
break;
case EM_386:
case EM_486:
rtype = get_i386_rel_type (ELF32_R_TYPE (info));
break;
case EM_68K:
rtype = get_m68k_rel_type (ELF32_R_TYPE (info));
break;
case EM_SPARC:
rtype = get_sparc_rel_type (ELF32_R_TYPE (info));
break;
case EM_CYGNUS_V850:
rtype = get_v850_rel_type (ELF32_R_TYPE (info));
break;
case EM_CYGNUS_D10V:
rtype = get_d10v_rel_type (ELF32_R_TYPE (info));
break;
/* start-sanitize-d30v */
case EM_CYGNUS_D30V:
rtype = get_d30v_rel_type (ELF32_R_TYPE (info));
break;
/* end-sanitize-d30v */
case EM_SH:
rtype = get_sh_rel_type (ELF32_R_TYPE (info));
break;
case EM_CYGNUS_MN10300:
rtype = get_mn10300_rel_type (ELF32_R_TYPE (info));
break;
case EM_CYGNUS_MN10200:
rtype = get_mn10200_rel_type (ELF32_R_TYPE (info));
break;
case EM_PPC:
rtype = get_ppc_rel_type (ELF32_R_TYPE (info));
break;
}
printf ("%-21.21s", rtype);
symtab_index = ELF32_R_SYM (info);
if (symtab_index && symtab != NULL)
{
Elf_Internal_Sym * psym;
psym = symtab + symtab_index;
printf (" %08lx ", (unsigned long) psym->st_value);
if (psym->st_name == 0)
printf ("%-17.17s",
SECTION_NAME (section_headers + psym->st_shndx));
else if (strtab == NULL)
printf (_("<string table index %d>"), psym->st_name);
else
printf ("%-17.17s", strtab + psym->st_name);
if (is_rela)
printf (" + %lx", (unsigned long) relas [i].r_addend);
}
putchar ('\n');
}
free (relas);
return 1;
}
static char *
get_dynamic_type (type)
unsigned long type;
{
static char buff [32];
switch (type)
{
case DT_NULL: return _("NULL");
case DT_NEEDED: return _("NEEDED");
case DT_PLTRELSZ: return _("PLTRELSZ");
case DT_PLTGOT: return _("PLTGOT");
case DT_HASH: return _("HASH");
case DT_STRTAB: return _("STRTAB");
case DT_SYMTAB: return _("SYMTAB");
case DT_RELA: return _("RELA");
case DT_RELASZ: return _("RELASZ");
case DT_RELAENT: return _("RELAENT");
case DT_STRSZ: return _("STRSZ");
case DT_SYMENT: return _("SYMENT");
case DT_INIT: return _("INIT");
case DT_FINI: return _("FINI");
case DT_SONAME: return _("SONAME");
case DT_RPATH: return _("RPATH");
case DT_SYMBOLIC: return _("SYMBOLIC");
case DT_REL: return _("REL");
case DT_RELSZ: return _("RELSZ");
case DT_RELENT: return _("RELENT");
case DT_PLTREL: return _("PLTREL");
case DT_DEBUG: return _("DEBUG");
case DT_TEXTREL: return _("TEXTREL");
case DT_JMPREL: return _("JMPREL");
case DT_VERDEF: return _("VERDEF");
case DT_VERDEFNUM: return _("VERDEFNUM");
case DT_VERNEED: return _("VERNEED");
case DT_VERNEEDNUM: return _("VERNEEDNUM");
case DT_VERSYM: return _("VERSYN");
case DT_AUXILIARY: return _("AUXILARY");
case DT_FILTER: return _("FILTER");
default:
if ((type >= DT_LOPROC) && (type <= DT_HIPROC))
sprintf (buff, _("Processor Specific: (%x)"), type);
else
sprintf (buff, _("<unknown>: %x"), type);
return buff;
}
}
static char *
get_file_type (e_type)
unsigned e_type;
{
static char buff [32];
switch (e_type)
{
case ET_NONE: return _("None");
case ET_REL: return _("Relocatable file");
case ET_EXEC: return _("Executable file");
case ET_DYN: return _("Shared object file");
case ET_CORE: return _("Core file");
default:
if ((e_type >= ET_LOPROC) && (e_type <= ET_HIPROC))
sprintf (buff, _("Processor Specific: (%x)"), e_type);
else
sprintf (buff, _("<unknown>: %x"), e_type);
return buff;
}
}
static char *
get_machine_name (e_machine)
unsigned e_machine;
{
static char buff [32];
switch (e_machine)
{
case EM_NONE: return _("None");
case EM_M32: return "WE32100";
case EM_SPARC: return "Sparc";
case EM_386: return "80386";
case EM_68K: return "MC68000";
case EM_88K: return "MC88000";
case EM_486: return "Intel 80486";
case EM_860: return "Intel 80860";
case EM_MIPS: return "MIPS R3000 big-endian";
case EM_S370: return "Amdahl";
case EM_MIPS_RS4_BE: return "MIPS R400 big-endian";
case EM_OLD_SPARCV9: return "Sparc v9 (old)";
case EM_PARISC: return "HPPA";
case EM_PPC_OLD: return "Power PC (old)";
case EM_SPARC32PLUS: return "Sparc v8+" ;
case EM_960: return "Intel 90860";
case EM_PPC: return "PowerPC";
case EM_V800: return "NEC V800";
case EM_FR20: return "Fujitsu FR20";
case EM_RH32: return "TRW RH32";
case EM_MMA: return "Fujitsu MMA";
case EM_ARM: return "ARM";
case EM_OLD_ALPHA: return "Digital Alpha (old)";
case EM_SH: return "Hitachi SH";
case EM_SPARCV9: return "Sparc v9";
case EM_ALPHA: return "Alpha";
case EM_CYGNUS_D10V: return "d10v";
/* start-sanitize-d30v */
case EM_CYGNUS_D30V: return "d30v";
/* end-sanitize-d30v */
case EM_CYGNUS_M32R: return "M32r";
case EM_CYGNUS_V850: return "v850";
case EM_CYGNUS_MN10300: return "mn10300";
case EM_CYGNUS_MN10200: return "mn10200";
default:
sprintf (buff, _("<unknown>: %x"), e_machine);
return buff;
}
}
static char *
get_machine_flags (e_flags, e_machine)
unsigned e_flags;
unsigned e_machine;
{
static char buf [1024];
buf[0] = '\0';
if (e_flags)
{
switch (e_machine)
{
default:
break;
case EM_PPC:
if (e_flags & EF_PPC_EMB)
strcat (buf, ", emb");
if (e_flags & EF_PPC_RELOCATABLE)
strcat (buf, ", relocatable");
if (e_flags & EF_PPC_RELOCATABLE_LIB)
strcat (buf, ", relocatable-lib");
break;
case EM_CYGNUS_M32R:
if ((e_flags & EF_M32R_ARCH) == E_M32R_ARCH)
strcat (buf, ", m32r");
/* start-sanitize-m32rx */
#ifdef E_M32RX_ARCH
if ((e_flags & EF_M32R_ARCH) == E_M32RX_ARCH)
strcat (buf, ", m32rx");
#endif
/* end-sanitize-m32rx */
break;
case EM_MIPS:
case EM_MIPS_RS4_BE:
if (e_flags & EF_MIPS_NOREORDER)
strcat (buf, ", noreorder");
if (e_flags & EF_MIPS_PIC)
strcat (buf, ", pic");
if (e_flags & EF_MIPS_CPIC)
strcat (buf, ", cpic");
if (e_flags & EF_MIPS_ABI2)
strcat (buf, ", abi2");
if ((e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_1)
strcat (buf, ", mips1");
if ((e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_2)
strcat (buf, ", mips2");
if ((e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_3)
strcat (buf, ", mips3");
if ((e_flags & EF_MIPS_ARCH) == E_MIPS_ARCH_4)
strcat (buf, ", mips4");
break;
}
}
return buf;
}
static char *
get_machine_data (e_data)
unsigned e_data;
{
static char buff [32];
switch (e_data)
{
case ELFDATA2LSB: return _("ELFDATA2LSB (little endian)");
case ELFDATA2MSB: return _("ELFDATA2MSB (big endian)");
default:
sprintf (buff, _("<unknown>: %x"), e_data);
return buff;
}
}
static char *
get_segment_type (p_type)
unsigned long p_type;
{
static char buff [32];
switch (p_type)
{
case PT_NULL: return _("Unused");
case PT_LOAD: return _("Loadable");
case PT_DYNAMIC: return _("Dynamic link info");
case PT_INTERP: return _("Interpreter");
case PT_NOTE: return _("Auxillary Info");
case PT_SHLIB: return _("Shared Library");
case PT_PHDR: return _("Program Header");
default:
if ((p_type >= PT_LOPROC) && (p_type <= PT_HIPROC))
return _("processor specific");
else
{
sprintf (buff, _("<unknown>: %x"), p_type);
return buff;
}
}
}
static char *
get_section_type_name (sh_type)
unsigned int sh_type;
{
static char buff [32];
switch (sh_type)
{
case SHT_NULL: return _("Unused");
case SHT_PROGBITS: return _("Program data");
case SHT_SYMTAB: return _("Symbol table");
case SHT_STRTAB: return _("String table");
case SHT_RELA: return _("Relocations");
case SHT_HASH: return _("Symbol hashes");
case SHT_DYNAMIC: return _("Dynamic info");
case SHT_NOTE: return _("Notes");
case SHT_NOBITS: return _("Space, no data");
case SHT_REL: return _("Relocations");
case SHT_SHLIB: return _("Shared lib info");
case SHT_DYNSYM: return _("Dynamic symbols");
case SHT_GNU_verdef: return _("Version definition");
case SHT_GNU_verneed: return _("Version needs");
case SHT_GNU_versym: return _("Version symbols");
case 0x6ffffff0: return "VERSYM";
case 0x6ffffffc: return "VERDEF";
case 0x7ffffffd: return "AUXILIARY";
case 0x7fffffff: return "FILTER";
default:
if ((sh_type >= SHT_LOPROC) && (sh_type <= SHT_HIPROC))
sprintf (buff, _("cpu defined (%d)"), sh_type - SHT_LOPROC);
else if ((sh_type >= SHT_LOUSER) && (sh_type <= SHT_HIUSER))
sprintf (buff, _("app defined (%d)"), sh_type - SHT_LOUSER);
else
sprintf (buff, _("<unknown>: %x"), sh_type);
return buff;
}
}
struct option options [] =
{
{"all", no_argument, 0, 'a'},
{"file-header", no_argument, 0, 'h'},
{"program-headers", no_argument, 0, 'l'},
{"headers", no_argument, 0, 'e'},
{"segments", no_argument, 0, 'l'},
{"sections", no_argument, 0, 'S'},
{"section-headers", no_argument, 0, 'S'},
{"symbols", no_argument, 0, 's'},
{"relocs", no_argument, 0, 'r'},
{"dynamic", no_argument, 0, 'd'},
{"version-info", no_argument, 0, 'V'},
{"use-dynamic", no_argument, 0, 'D'},
{"hex-dump", required_argument, 0, 'x'},
#ifdef SUPPORT_DISASSEMBLY
{"instruction-dump", required_argument, 0, 'i'},
#endif
{"version", no_argument, 0, 'v'},
{"help", no_argument, 0, 'H'},
{0, no_argument, 0, 0}
};
static void
usage ()
{
fprintf (stdout, _("Usage: readelf {options} elf-file(s)\n"));
fprintf (stdout, _(" Options are:\n"));
fprintf (stdout, _(" -a or --all Equivalent to: -h -l -S -s -r -d -V\n"));
fprintf (stdout, _(" -h or --file-header Display the ELF file header\n"));
fprintf (stdout, _(" -l or --program-headers or --segments\n"));
fprintf (stdout, _(" Display the program headers\n"));
fprintf (stdout, _(" -S or --section-headers or --sections\n"));
fprintf (stdout, _(" Display the sections' header\n"));
fprintf (stdout, _(" -e or --headers Equivalent to: -h -l -S\n"));
fprintf (stdout, _(" -s or --symbols Display the symbol table\n"));
fprintf (stdout, _(" -r or --relocs Display the relocations (if present)\n"));
fprintf (stdout, _(" -d or --dynamic Display the dynamic segment (if present)\n"));
fprintf (stdout, _(" -V or --version-info Display the version sections (if present)\n"));
fprintf (stdout, _(" -D or --use-dynamic Use the dynamic section info when displaying symbols\n"));
fprintf (stdout, _(" -x <number> or --hex-dump=<number>\n"));
fprintf (stdout, _(" Dump the contents of section <number>\n"));
#ifdef SUPPORT_DISASSEMBLY
fprintf (stdout, _(" -i <number> or --instruction-dump=<number>\n"));
fprintf (stdout, _(" Disassemble the contents of section <number>\n"));
#endif
fprintf (stdout, _(" -v or --version Display the version number of readelf\n"));
fprintf (stdout, _(" -H or --help Display this information\n"));
fprintf (stdout, _("Report bugs to bug-gnu-utils@gnu.org\n"));
exit (0);
}
static void
parse_args (argc, argv)
int argc;
char ** argv;
{
int c;
if (argc < 2)
usage ();
while ((c = getopt_long
(argc, argv, "ersahldSDx:i:vV", options, NULL)) != EOF)
{
char * cp;
int section;
switch (c)
{
case 'H':
usage ();
break;
case 'a':
do_syms ++;
do_reloc ++;
do_dynamic ++;
do_header ++;
do_sections ++;
do_segments ++;
do_version ++;
break;
case 'e':
do_header ++;
do_sections ++;
do_segments ++;
break;
case 'D':
do_using_dynamic ++;
break;
case 'r':
do_reloc ++;
break;
case 'h':
do_header ++;
break;
case 'l':
do_segments ++;
break;
case 's':
do_syms ++;
break;
case 'S':
do_sections ++;
break;
case 'd':
do_dynamic ++;
break;
case 'x':
do_dump ++;
section = strtoul (optarg, & cp, 0);
if (! * cp && section >= 0 && section < NUM_DUMP_SECTS)
{
dump_sects [section] |= HEX_DUMP;
break;
}
goto oops;
#ifdef SUPPORT_DISASSEMBLY
case 'i':
do_dump ++;
section = strtoul (optarg, & cp, 0);
if (! * cp && section >= 0 && section < NUM_DUMP_SECTS)
{
dump_sects [section] |= DISASS_DUMP;
break;
}
goto oops;
#endif
case 'v':
print_version (program_name);
break;
case 'V':
do_version ++;
break;
default:
oops:
/* xgettext:c-format */
error (_("Invalid option '-%c'\n"), c);
/* Drop through. */
case '?':
usage ();
}
}
if (!do_dynamic && !do_syms && !do_reloc && !do_sections
&& !do_segments && !do_header && !do_dump && !do_version)
usage ();
else if (argc < 3)
{
warn (_("Nothing to do.\n"));
usage();
}
}
/* Decode the data held in 'elf_header'. */
static int
process_file_header ()
{
if ( elf_header.e_ident [EI_MAG0] != ELFMAG0
|| elf_header.e_ident [EI_MAG1] != ELFMAG1
|| elf_header.e_ident [EI_MAG2] != ELFMAG2
|| elf_header.e_ident [EI_MAG3] != ELFMAG3)
{
error
(_("Not an ELF file - it has the wrong magic bytes at the start\n"));
return 0;
}
if (elf_header.e_ident [EI_CLASS] != ELFCLASS32)
{
error (_("Not a 32 bit ELF file\n"));
return 0;
}
if (do_header)
{
int i;
printf (_("ELF Header:\n"));
printf (_(" Magic: "));
for (i = 0; i < EI_NIDENT; i ++)
printf ("%2.2x ", elf_header.e_ident [i]);
printf ("\n");
printf (_(" Type: %s\n"),
get_file_type (elf_header.e_type));
printf (_(" Machine: %s\n"),
get_machine_name (elf_header.e_machine));
printf (_(" Version: 0x%lx\n"),
(unsigned long) elf_header.e_version);
printf (_(" Data: %s\n"),
get_machine_data (elf_header.e_ident [EI_DATA]));
printf (_(" Entry point address: 0x%lx\n"),
(unsigned long) elf_header.e_entry);
printf (_(" Start of program headers: %ld (bytes into file)\n"),
(long) elf_header.e_phoff);
printf (_(" Start of section headers: %ld (bytes into file)\n"),
(long) elf_header.e_shoff);
printf (_(" Flags: 0x%lx%s\n"),
(unsigned long) elf_header.e_flags,
get_machine_flags (elf_header.e_flags, elf_header.e_machine));
printf (_(" Size of this header: %ld (bytes)\n"),
(long) elf_header.e_ehsize);
printf (_(" Size of program headers: %ld (bytes)\n"),
(long) elf_header.e_phentsize);
printf (_(" Number of program headers: %ld\n"),
(long) elf_header.e_phnum);
printf (_(" Size of section headers: %ld (bytes)\n"),
(long) elf_header.e_shentsize);
printf (_(" Number of section headers: %ld\n"),
(long) elf_header.e_shnum);
printf (_(" Section header string table index: %ld\n"),
(long) elf_header.e_shstrndx);
}
return 1;
}
static int
process_program_headers (file)
FILE * file;
{
Elf32_External_Phdr * phdrs;
Elf32_Internal_Phdr * program_headers;
Elf32_Internal_Phdr * segment;
unsigned int i;
if (elf_header.e_phnum == 0)
{
if (do_segments)
printf (_("\nThere are no program headers in this file.\n"));
return 1;
}
if (do_segments && !do_header)
{
printf (_("\nElf file is %s\n"), get_file_type (elf_header.e_type));
printf (_("Entry point 0x%lx\n"), (unsigned long) elf_header.e_entry);
printf (_("There are %d program headers, starting at offset %lx:\n"),
elf_header.e_phnum, (unsigned long) elf_header.e_phoff);
}
GET_DATA_ALLOC (elf_header.e_phoff,
elf_header.e_phentsize * elf_header.e_phnum,
phdrs, Elf32_External_Phdr *, "program headers");
program_headers = (Elf32_Internal_Phdr *) malloc
(elf_header.e_phnum * sizeof (Elf32_Internal_Phdr));
if (program_headers == NULL)
{
error (_("Out of memory\n"));
return 0;
}
for (i = 0, segment = program_headers;
i < elf_header.e_phnum;
i ++, segment ++)
{
segment->p_type = BYTE_GET (phdrs[i].p_type);
segment->p_offset = BYTE_GET (phdrs[i].p_offset);
segment->p_vaddr = BYTE_GET (phdrs[i].p_vaddr);
segment->p_paddr = BYTE_GET (phdrs[i].p_paddr);
segment->p_filesz = BYTE_GET (phdrs[i].p_filesz);
segment->p_memsz = BYTE_GET (phdrs[i].p_memsz);
segment->p_flags = BYTE_GET (phdrs[i].p_flags);
segment->p_align = BYTE_GET (phdrs[i].p_align);
}
free (phdrs);
if (do_segments)
{
printf
(_("\nProgram Header%s:\n"), elf_header.e_phnum > 1 ? "s" : "");
printf
(_(" Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align\n"));
}
loadaddr = -1;
dynamic_addr = 0;
for (i = 0, segment = program_headers;
i < elf_header.e_phnum;
i ++, segment ++)
{
if (do_segments)
{
printf (" %-16.16s ", get_segment_type (segment->p_type));
printf ("0x%5.5lx ", (unsigned long) segment->p_offset);
printf ("0x%8.8lx ", (unsigned long) segment->p_vaddr);
printf ("0x%8.8lx ", (unsigned long) segment->p_paddr);
printf ("0x%5.5lx ", (unsigned long) segment->p_filesz);
printf ("0x%5.5lx ", (unsigned long) segment->p_memsz);
printf ("%c%c%c ",
(segment->p_flags & PF_R ? 'R' : ' '),
(segment->p_flags & PF_W ? 'W' : ' '),
(segment->p_flags & PF_X ? 'E' : ' '));
printf ("%#lx", (unsigned long) segment->p_align);
}
switch (segment->p_type)
{
case PT_LOAD:
if (loadaddr == -1)
loadaddr = (segment->p_vaddr & 0xfffff000)
- (segment->p_offset & 0xfffff000);
break;
case PT_DYNAMIC:
if (dynamic_addr)
error (_("more than one dynamic segment\n"));
dynamic_addr = segment->p_offset;
dynamic_size = segment->p_filesz;
break;
case PT_INTERP:
if (fseek (file, segment->p_offset, SEEK_SET))
error (_("Unable to find program interpreter name\n"));
else
{
program_interpreter[0] = 0;
fscanf (file, "%63s", program_interpreter);
if (do_segments)
printf (_("\n [Requesting program interpreter: %s]"),
program_interpreter);
}
break;
}
if (do_segments)
putc ('\n', stdout);
}
if (loadaddr == -1)
{
/* Very strange. */
loadaddr = 0;
}
if (do_segments && section_headers != NULL)
{
printf (_("\n Section to Segment mapping:\n"));
printf (_(" Segment Sections...\n"));
assert (string_table != NULL);
for (i = 0; i < elf_header.e_phnum; i++)
{
int j;
Elf32_Internal_Shdr * section;
segment = program_headers + i;
section = section_headers;
printf (" %2.2d ", i);
for (j = 0; j < elf_header.e_shnum; j++, section ++)
{
if (section->sh_size > 0
/* Compare allocated sections by VMA, unallocated
sections by file offset. */
&& (section->sh_flags & SHF_ALLOC
? (section->sh_addr >= segment->p_vaddr
&& section->sh_addr + section->sh_size
<= segment->p_vaddr + segment->p_memsz)
: (section->sh_offset >= segment->p_offset
&& (section->sh_offset + section->sh_size
<= segment->p_offset + segment->p_filesz))))
printf ("%s ", SECTION_NAME (section));
}
putc ('\n',stdout);
}
}
free (program_headers);
return 1;
}
static int
get_section_headers (file)
FILE * file;
{
Elf32_External_Shdr * shdrs;
Elf32_Internal_Shdr * internal;
unsigned int i;
GET_DATA_ALLOC (elf_header.e_shoff,
elf_header.e_shentsize * elf_header.e_shnum,
shdrs, Elf32_External_Shdr *, "section headers");
section_headers = (Elf32_Internal_Shdr *) malloc
(elf_header.e_shnum * sizeof (Elf32_Internal_Shdr));
if (section_headers == NULL)
{
error (_("Out of memory\n"));
return 0;
}
for (i = 0, internal = section_headers;
i < elf_header.e_shnum;
i ++, internal ++)
{
internal->sh_name = BYTE_GET (shdrs[i].sh_name);
internal->sh_type = BYTE_GET (shdrs[i].sh_type);
internal->sh_flags = BYTE_GET (shdrs[i].sh_flags);
internal->sh_addr = BYTE_GET (shdrs[i].sh_addr);
internal->sh_offset = BYTE_GET (shdrs[i].sh_offset);
internal->sh_size = BYTE_GET (shdrs[i].sh_size);
internal->sh_link = BYTE_GET (shdrs[i].sh_link);
internal->sh_info = BYTE_GET (shdrs[i].sh_info);
internal->sh_addralign = BYTE_GET (shdrs[i].sh_addralign);
internal->sh_entsize = BYTE_GET (shdrs[i].sh_entsize);
}
free (shdrs);
return 1;
}
static Elf_Internal_Sym *
get_elf_symbols (file, offset, number)
FILE * file;
unsigned long offset;
unsigned long number;
{
Elf32_External_Sym * esyms;
Elf_Internal_Sym * isyms;
Elf_Internal_Sym * psym;
unsigned int j;
GET_DATA_ALLOC (offset, number * sizeof (Elf32_External_Sym),
esyms, Elf32_External_Sym *, "symbols");
isyms = (Elf_Internal_Sym *) malloc (number * sizeof (Elf_Internal_Sym));
if (isyms == NULL)
{
error (_("Out of memory\n"));
free (esyms);
return NULL;
}
for (j = 0, psym = isyms;
j < number;
j ++, psym ++)
{
psym->st_name = BYTE_GET (esyms[j].st_name);
psym->st_value = BYTE_GET (esyms[j].st_value);
psym->st_size = BYTE_GET (esyms[j].st_size);
psym->st_shndx = BYTE_GET (esyms[j].st_shndx);
psym->st_info = BYTE_GET (esyms[j].st_info);
psym->st_other = BYTE_GET (esyms[j].st_other);
}
free (esyms);
return isyms;
}
static int
process_section_headers (file)
FILE * file;
{
Elf32_Internal_Shdr * section;
int i;
section_headers = NULL;
if (elf_header.e_shnum == 0)
{
if (do_sections)
printf (_("\nThere are no sections in this file.\n"));
return 1;
}
if (do_sections && !do_header)
printf (_("There are %d section headers, starting at offset %x:\n"),
elf_header.e_shnum, elf_header.e_shoff);
if (! get_section_headers (file))
return 0;
/* Read in the string table, so that we have names to display. */
section = section_headers + elf_header.e_shstrndx;
if (section->sh_size != 0)
{
unsigned long string_table_offset;
string_table_offset = section->sh_offset;
GET_DATA_ALLOC (section->sh_offset, section->sh_size,
string_table, char *, "string table");
}
/* Scan the sections for the dynamic symbol table
and dynamic string table. */
dynamic_symbols = NULL;
dynamic_strings = NULL;
for (i = 0, section = section_headers;
i < elf_header.e_shnum;
i ++, section ++)
{
if (section->sh_type == SHT_DYNSYM)
{
if (dynamic_symbols != NULL)
{
error (_("File contains multiple dynamic symbol tables\n"));
continue;
}
dynamic_symbols = get_elf_symbols
(file, section->sh_offset, section->sh_size / section->sh_entsize);
}
else if (section->sh_type == SHT_STRTAB
&& strcmp (SECTION_NAME (section), ".dynstr") == 0)
{
if (dynamic_strings != NULL)
{
error (_("File contains multiple dynamic string tables\n"));
continue;
}
GET_DATA_ALLOC (section->sh_offset, section->sh_size,
dynamic_strings, char *, "dynamic strings");
}
}
if (! do_sections)
return 1;
printf (_("\nSection Header%s:\n"), elf_header.e_shnum > 1 ? "s" : "");
printf
(_(" [Nr] Name Type Addr Off Size ES Flg Lk In Al\n"));
for (i = 0, section = section_headers;
i < elf_header.e_shnum;
i ++, section ++)
{
printf (" [%2d] %-17.17s %-15.15s ",
i,
SECTION_NAME (section),
get_section_type_name (section->sh_type));
printf ( "%8.8lx %6.6lx %6.6lx %2.2lx",
(unsigned long) section->sh_addr,
(unsigned long) section->sh_offset,
(unsigned long) section->sh_size,
(unsigned long) section->sh_entsize);
printf (" %c%c%c %2ld %3lx %ld \n",
(section->sh_flags & SHF_WRITE ? 'W' : ' '),
(section->sh_flags & SHF_ALLOC ? 'A' : ' '),
(section->sh_flags & SHF_EXECINSTR ? 'X' : ' '),
(unsigned long) section->sh_link,
(unsigned long) section->sh_info,
(unsigned long) section->sh_addralign);
}
return 1;
}
/* Process the reloc section. */
static int
process_relocs (file)
FILE * file;
{
unsigned long rel_size;
unsigned long rel_offset;
if (!do_reloc)
return 1;
if (do_using_dynamic)
{
rel_size = 0;
rel_offset = 0;
if (dynamic_info [DT_REL])
{
rel_offset = dynamic_info [DT_REL];
rel_size = dynamic_info [DT_RELSZ];
}
else if (dynamic_info [DT_RELA])
{
rel_offset = dynamic_info [DT_RELA];
rel_size = dynamic_info [DT_RELASZ];
}
else if (dynamic_info [DT_JMPREL])
{
rel_offset = dynamic_info [DT_JMPREL];
rel_size = dynamic_info [DT_PLTRELSZ];
}
if (rel_size)
{
printf
(_("\nRelocation section at offset 0x%x contains %d bytes:\n"),
rel_offset, rel_size);
dump_relocations (file, rel_offset - loadaddr, rel_size,
dynamic_symbols, dynamic_strings);
}
else
printf (_("\nThere are no dynamic relocations in this file.\n"));
}
else
{
Elf32_Internal_Shdr * section;
unsigned long i;
int found = 0;
assert (string_table != NULL);
for (i = 0, section = section_headers;
i < elf_header.e_shnum;
i++, section ++)
{
if ( section->sh_type != SHT_RELA
&& section->sh_type != SHT_REL)
continue;
rel_offset = section->sh_offset;
rel_size = section->sh_size;
if (rel_size)
{
Elf32_Internal_Shdr * strsec;
Elf32_Internal_Shdr * symsec;
Elf_Internal_Sym * symtab;
char * strtab;
printf
(_("\nRelocation section '%s' at offset 0x%x contains %d entries:\n"),
SECTION_NAME (section), rel_offset,
rel_size / section->sh_entsize);
symsec = section_headers + section->sh_link;
symtab = get_elf_symbols (file, symsec->sh_offset,
symsec->sh_size / symsec->sh_entsize);
if (symtab == NULL)
continue;
strsec = section_headers + symsec->sh_link;
GET_DATA_ALLOC (strsec->sh_offset, strsec->sh_size, strtab,
char *, "string table");
dump_relocations (file, rel_offset, rel_size, symtab, strtab);
free (strtab);
free (symtab);
found = 1;
}
}
if (! found)
printf (_("\nThere are no relocations in this file.\n"));
}
return 1;
}
/* Parse the dynamic segment */
static int
process_dynamic_segment (file)
FILE * file;
{
Elf_Internal_Dyn * dynamic_segment;
Elf_Internal_Dyn * entry;
Elf32_External_Dyn * edyn;
unsigned int i;
if (dynamic_size == 0)
{
if (do_dynamic)
printf (_("\nThere is no dynamic segment in this file.\n"));
return 1;
}
GET_DATA_ALLOC (dynamic_addr, dynamic_size,
edyn, Elf32_External_Dyn *, "dynamic segment");
dynamic_size = dynamic_size / sizeof (Elf32_External_Dyn);
dynamic_segment = (Elf_Internal_Dyn *)
malloc (dynamic_size * sizeof (Elf_Internal_Dyn));
if (dynamic_segment == NULL)
{
error (_("Out of memory\n"));
free (edyn);
return 0;
}
for (i = 0, entry = dynamic_segment;
i < dynamic_size;
i ++, entry ++)
{
entry->d_tag = BYTE_GET (edyn [i].d_tag);
entry->d_un.d_val = BYTE_GET (edyn [i].d_un.d_val);
}
free (edyn);
/* Find the appropriate symbol table. */
if (dynamic_symbols == NULL)
{
for (i = 0, entry = dynamic_segment;
i < dynamic_size;
++i, ++ entry)
{
unsigned long offset;
long num_syms;
if (entry->d_tag != DT_SYMTAB)
continue;
dynamic_info [DT_SYMTAB] = entry->d_un.d_val;
/* Since we do not know how big the symbol table is,
we default to reading in the entire file (!) and
processing that. This is overkill, I know, but it
should work. */
offset = entry->d_un.d_val - loadaddr;
if (fseek (file, 0, SEEK_END))
error (_("Unable to seek to end of file!"));
num_syms = (ftell (file) - offset) / sizeof (Elf32_External_Sym);
if (num_syms < 1)
{
error (_("Unable to determine the number of symbols to load\n"));
continue;
}
dynamic_symbols = get_elf_symbols (file, offset, num_syms);
}
}
/* Similarly find a string table. */
if (dynamic_strings == NULL)
{
for (i = 0, entry = dynamic_segment;
i < dynamic_size;
++i, ++ entry)
{
unsigned long offset;
long str_tab_len;
if (entry->d_tag != DT_STRTAB)
continue;
dynamic_info [DT_STRTAB] = entry->d_un.d_val;
/* Since we do not know how big the string table is,
we default to reading in the entire file (!) and
processing that. This is overkill, I know, but it
should work. */
offset = entry->d_un.d_val - loadaddr;
if (fseek (file, 0, SEEK_END))
error (_("Unable to seek to end of file\n"));
str_tab_len = ftell (file) - offset;
if (str_tab_len < 1)
{
error
(_("Unable to determine the length of the dynamic string table\n"));
continue;
}
GET_DATA_ALLOC (offset, str_tab_len, dynamic_strings, char *,
"dynamic string table");
break;
}
}
if (do_dynamic && dynamic_addr)
printf (_("\nDynamic segement at offset 0x%x contains %d entries:\n"),
dynamic_addr, dynamic_size);
if (do_dynamic)
printf (_(" Tag Type Name/Value\n"));
for (i = 0, entry = dynamic_segment;
i < dynamic_size;
i++, entry ++)
{
if (do_dynamic)
printf (_(" 0x%-6.6lx (%-11.11s) "),
(unsigned long) entry->d_tag,
get_dynamic_type (entry->d_tag));
switch (entry->d_tag)
{
case DT_AUXILIARY:
case DT_FILTER:
if (do_dynamic)
{
if (entry->d_tag == DT_AUXILIARY)
printf (_("Auxiliary library"));
else
printf (_("Filter library"));
if (dynamic_strings)
printf (": [%s]\n", dynamic_strings + entry->d_un.d_val);
else
printf (": %#lx\n", (long) entry->d_un.d_val);
}
break;
case DT_NULL :
case DT_NEEDED :
case DT_PLTRELSZ:
case DT_PLTGOT :
case DT_HASH :
case DT_STRTAB :
case DT_SYMTAB :
case DT_RELA :
case DT_RELASZ :
case DT_RELAENT :
case DT_STRSZ :
case DT_SYMENT :
case DT_INIT :
case DT_FINI :
case DT_SONAME :
case DT_RPATH :
case DT_SYMBOLIC:
case DT_REL :
case DT_RELSZ :
case DT_RELENT :
case DT_PLTREL :
case DT_DEBUG :
case DT_TEXTREL :
case DT_JMPREL :
dynamic_info [entry->d_tag] = entry->d_un.d_val;
if (do_dynamic)
{
char * name;
if (dynamic_strings == NULL)
name = NULL;
else
name = dynamic_strings + entry->d_un.d_val;
if (name)
{
switch (entry->d_tag)
{
case DT_NEEDED:
printf (_("Shared library: [%s]"), name);
if (strcmp (name, program_interpreter))
printf ("\n");
else
printf (_(" program interpreter\n"));
break;
case DT_SONAME:
printf (_("Library soname: [%s]\n"), name);
break;
case DT_RPATH:
printf (_("Library rpath: [%s]\n"), name);
break;
default:
printf ("%#lx\n", (long) entry->d_un.d_val);
}
}
else
printf ("%#lx\n", (long) entry->d_un.d_val);
}
break;
default:
if ((entry->d_tag >= DT_VERSYM) && (entry->d_tag <= DT_VERNEEDNUM))
{
version_info [DT_VERSIONTAGIDX (entry->d_tag)] =
entry->d_un.d_val;
if (do_dynamic)
printf ("%#lx\n", (long) entry->d_un.d_ptr);
}
break;
}
}
free (dynamic_segment);
return 1;
}
static char *
get_ver_flags (unsigned short flags)
{
static char buff [32];
buff[0] = 0;
if (flags == 0)
return _("none");
if (flags & VER_FLG_BASE)
strcat (buff, "BASE ");
if (flags & VER_FLG_WEAK)
{
if (flags & VER_FLG_BASE)
strcat (buff, "| ");
strcat (buff, "WEAK ");
}
if (flags & ~(VER_FLG_BASE | VER_FLG_WEAK))
strcat (buff, "| <unknown>");
return buff;
}
/* Display the contents of the version sections. */
static int
process_version_sections (file)
FILE * file;
{
Elf32_Internal_Shdr * section;
unsigned i;
int found = 0;
if (! do_version)
return 1;
for (i = 0, section = section_headers;
i < elf_header.e_shnum;
i++, section ++)
{
switch (section->sh_type)
{
case SHT_GNU_verdef:
{
Elf_External_Verdef * edefs;
unsigned int idx;
unsigned int cnt;
found = 1;
printf
(_("\nVersion definition section '%s' contains %d entries:\n"),
SECTION_NAME (section), section->sh_info);
printf (_(" Addr: %#08x Offset: %#08x Link: %x (%s)\n"),
section->sh_addr, section->sh_offset, section->sh_link,
SECTION_NAME (section_headers + section->sh_link));
GET_DATA_ALLOC (section->sh_offset, section->sh_size,
edefs, Elf_External_Verdef *,
"version definition section");
for (idx = cnt = 0; cnt < section->sh_info; ++ cnt)
{
char * vstart;
Elf_External_Verdef * edef;
Elf_Internal_Verdef ent;
Elf_External_Verdaux * eaux;
Elf_Internal_Verdaux aux;
int j;
int isum;
vstart = ((char *) edefs) + idx;
edef = (Elf_External_Verdef *) vstart;
ent.vd_version = BYTE_GET (edef->vd_version);
ent.vd_flags = BYTE_GET (edef->vd_flags);
ent.vd_ndx = BYTE_GET (edef->vd_ndx);
ent.vd_cnt = BYTE_GET (edef->vd_cnt);
ent.vd_hash = BYTE_GET (edef->vd_hash);
ent.vd_aux = BYTE_GET (edef->vd_aux);
ent.vd_next = BYTE_GET (edef->vd_next);
printf (_(" %#06x: Rev: %d Flags: %s"),
idx, ent.vd_version, get_ver_flags (ent.vd_flags));
printf (_(" Index: %ld Cnt: %ld "), ent.vd_ndx, ent.vd_cnt);
vstart += ent.vd_aux;
eaux = (Elf_External_Verdaux *) vstart;
aux.vda_name = BYTE_GET (eaux->vda_name);
aux.vda_next = BYTE_GET (eaux->vda_next);
if (dynamic_strings)
printf (_("Name: %s\n"), dynamic_strings + aux.vda_name);
else
printf (_("Name index: %ld\n"), aux.vda_name);
isum = idx + ent.vd_aux;
for (j = 1; j < ent.vd_cnt; j ++)
{
isum += aux.vda_next;
vstart += aux.vda_next;
eaux = (Elf_External_Verdaux *) vstart;
aux.vda_name = BYTE_GET (eaux->vda_name);
aux.vda_next = BYTE_GET (eaux->vda_next);
if (dynamic_strings)
printf (_(" %#06x: Parent %d: %s\n"),
isum, j, dynamic_strings + aux.vda_name);
else
printf (_(" %#06x: Parent %d, name index: %ld\n"),
isum, j, aux.vda_name);
}
idx += ent.vd_next;
}
free (edefs);
}
break;
case SHT_GNU_verneed:
{
Elf_External_Verneed * eneed;
unsigned int idx;
unsigned int cnt;
found = 1;
printf (_("\nVersion needs section '%s' contains %d entries:\n"),
SECTION_NAME (section), section->sh_info);
printf
(_(" Addr: %#08x Offset: %#08x Link to section: %d (%s)\n"),
section->sh_addr, section->sh_offset, section->sh_link,
SECTION_NAME (section_headers + section->sh_link));
GET_DATA_ALLOC (section->sh_offset, section->sh_size,
eneed, Elf_External_Verneed *,
"version need section");
for (idx = cnt = 0; cnt < section->sh_info; ++cnt)
{
Elf_External_Verneed * entry;
Elf_Internal_Verneed ent;
int j;
int isum;
char * vstart;
vstart = ((char *) eneed) + idx;
entry = (Elf_External_Verneed *) vstart;
ent.vn_version = BYTE_GET (entry->vn_version);
ent.vn_cnt = BYTE_GET (entry->vn_cnt);
ent.vn_file = BYTE_GET (entry->vn_file);
ent.vn_aux = BYTE_GET (entry->vn_aux);
ent.vn_next = BYTE_GET (entry->vn_next);
printf (_(" %#06x: Version: %d"), idx, ent.vn_version);
if (dynamic_strings)
printf (_(" File: %s"), dynamic_strings + ent.vn_file);
else
printf (_(" File: %lx"), ent.vn_file);
printf (_(" Cnt: %d\n"), ent.vn_cnt);
vstart += ent.vn_aux;
for (j = 0, isum = idx + ent.vn_aux; j < ent.vn_cnt; ++j)
{
Elf_External_Vernaux * eaux;
Elf_Internal_Vernaux aux;
eaux = (Elf_External_Vernaux *) vstart;
aux.vna_hash = BYTE_GET (eaux->vna_hash);
aux.vna_flags = BYTE_GET (eaux->vna_flags);
aux.vna_other = BYTE_GET (eaux->vna_other);
aux.vna_name = BYTE_GET (eaux->vna_name);
aux.vna_next = BYTE_GET (eaux->vna_next);
if (dynamic_strings)
printf (_(" %#06x: Name: %s"),
isum, dynamic_strings + aux.vna_name);
else
printf (_(" %#06x: Name index: %lx"),
isum, aux.vna_name);
printf (_(" Flags: %s Version: %d\n"),
get_ver_flags (aux.vna_flags), aux.vna_other);
isum += aux.vna_next;
vstart += aux.vna_next;
}
idx += ent.vn_next;
}
free (eneed);
}
break;
case SHT_GNU_versym:
{
Elf32_Internal_Shdr * link_section;
int total;
int cnt;
unsigned char * edata;
unsigned short * data;
char * strtab;
Elf_Internal_Sym * symbols;
Elf32_Internal_Shdr * string_sec;
link_section = section_headers + section->sh_link;
total = section->sh_size / section->sh_entsize;
found = 1;
symbols = get_elf_symbols
(file, link_section->sh_offset,
link_section->sh_size / link_section->sh_entsize);
string_sec = section_headers + link_section->sh_link;
GET_DATA_ALLOC (string_sec->sh_offset, string_sec->sh_size,
strtab, char *, "version string table");
printf (_("\nVersion symbols section '%s' contains %d entries:\n"),
SECTION_NAME (section), total);
printf (_(" Addr: %#08x Offset: %#08x Link: %x (%s)\n"),
section->sh_addr, section->sh_offset, section->sh_link,
SECTION_NAME (link_section));
GET_DATA_ALLOC (version_info [DT_VERSIONTAGIDX (DT_VERSYM)]
- loadaddr,
total * sizeof (short), edata,
char *, "version symbol data");
data = (unsigned short *) malloc (total * sizeof (short));
for (cnt = total; cnt --;)
data [cnt] = byte_get (edata + cnt * sizeof (short), sizeof (short));
free (edata);
for (cnt = 0; cnt < total; cnt += 4)
{
int j, nn;
printf (" %03x:", cnt);
for (j = 0; (j < 4) && (cnt + j) < total; ++j)
switch (data [cnt + j])
{
case 0:
printf (" 0 (*local*) ");
break;
case 1:
printf (" 1 (*global*) ");
break;
default:
nn = printf ("%4x%c", data [cnt + j] & 0x7fff,
data [cnt + j] & 0x8000 ? 'h' : ' ');
if (symbols [cnt + j].st_shndx < SHN_LORESERVE
&& section_headers[symbols [cnt + j].st_shndx].sh_type
== SHT_NOBITS)
{
/* We must test both. */
Elf_Internal_Verneed ivn;
unsigned long offset;
offset = version_info [DT_VERSIONTAGIDX (DT_VERNEED)]
- loadaddr;
do
{
Elf_External_Verneed evn;
Elf_External_Vernaux evna;
Elf_Internal_Vernaux ivna;
unsigned long vna_off;
GET_DATA (offset, evn, "version need");
ivn.vn_aux = BYTE_GET (evn.vn_aux);
ivn.vn_next = BYTE_GET (evn.vn_next);
vna_off = offset + ivn.vn_aux;
do
{
GET_DATA (vna_off, evna,
"version need aux (1)");
ivna.vna_next = BYTE_GET (evna.vna_next);
ivna.vna_other = BYTE_GET (evna.vna_other);
vna_off += ivna.vna_next;
}
while (ivna.vna_other != data [cnt + j]
&& ivna.vna_next != 0);
if (ivna.vna_other == data [cnt + j])
{
ivna.vna_name = BYTE_GET (evna.vna_name);
nn += printf ("(%11.11s)",
strtab + ivna.vna_name);
break;
}
else if (ivn.vn_next == 0)
{
if (data [cnt + j] != 0x8001)
{
Elf_Internal_Verdef ivd;
Elf_External_Verdef evd;
offset = version_info
[DT_VERSIONTAGIDX (DT_VERDEF)]
- loadaddr;
do
{
GET_DATA (offset, evd,
"version definition");
ivd.vd_next = BYTE_GET (evd.vd_next);
ivd.vd_ndx = BYTE_GET (evd.vd_ndx);
offset += ivd.vd_next;
}
while (ivd.vd_ndx
!= (data [cnt + j] & 0x7fff)
&& ivd.vd_next != 0);
if (ivd.vd_ndx
== (data [cnt + j] & 0x7fff))
{
Elf_External_Verdaux evda;
Elf_Internal_Verdaux ivda;
ivd.vd_aux = BYTE_GET (evd.vd_aux);
GET_DATA (offset + ivd.vd_aux, evda,
"version definition aux");
ivda.vda_name =
BYTE_GET (evda.vda_name);
nn +=
printf ("(%11.11s)",
strtab + ivda.vda_name);
}
}
break;
}
else
offset += ivn.vn_next;
}
while (ivn.vn_next);
}
else if (symbols [cnt + j].st_shndx == SHN_UNDEF)
{
Elf_Internal_Verneed ivn;
unsigned long offset;
offset = version_info [DT_VERSIONTAGIDX (DT_VERNEED)]
- loadaddr;
do
{
Elf_Internal_Vernaux ivna;
Elf_External_Verneed evn;
Elf_External_Vernaux evna;
unsigned long a_off;
GET_DATA (offset, evn, "version need");
ivn.vn_aux = BYTE_GET (evn.vn_aux);
ivn.vn_next = BYTE_GET (evn.vn_next);
a_off = offset + ivn.vn_aux;
do
{
GET_DATA (a_off, evna,
"version need aux (2)");
ivna.vna_next = BYTE_GET (evna.vna_next);
ivna.vna_other = BYTE_GET (evna.vna_other);
a_off += ivna.vna_next;
}
while (ivna.vna_other != data [cnt + j]
&& ivna.vna_next != 0);
if (ivna.vna_other == data [cnt + j])
{
ivna.vna_name = BYTE_GET (evna.vna_name);
nn += printf ("(%11.11s)",
strtab + ivna.vna_name);
break;
}
offset += ivn.vn_next;
}
while (ivn.vn_next);
}
else if (data [cnt + j] != 0x8001)
{
Elf_Internal_Verdef ivd;
Elf_External_Verdef evd;
unsigned long offset;
offset = version_info
[DT_VERSIONTAGIDX (DT_VERDEF)] - loadaddr;
do
{
GET_DATA (offset, evd, "version def");
ivd.vd_next = BYTE_GET (evd.vd_next);
ivd.vd_ndx = BYTE_GET (evd.vd_ndx);
offset += ivd.vd_next;
}
while (ivd.vd_ndx != (data [cnt + j] & 0x7fff)
&& ivd.vd_next != 0);
if (ivd.vd_ndx == (data [cnt + j] & 0x7fff))
{
Elf_External_Verdaux evda;
Elf_Internal_Verdaux ivda;
ivd.vd_aux = BYTE_GET (evd.vd_aux);
GET_DATA (offset - ivd.vd_next + ivd.vd_aux,
evda, "version def aux");
ivda.vda_name = BYTE_GET (evda.vda_name);
nn += printf ("(%11.11s)",
strtab + ivda.vda_name);
}
}
if (nn < 18)
printf ("%*c", 18 - nn, ' ');
}
putchar ('\n');
}
free (data);
free (strtab);
free (symbols);
}
break;
default:
break;
}
}
if (! found)
printf (_("\nNo version information found in this file.\n"));
return 1;
}
static char *
get_symbol_binding (binding)
unsigned int binding;
{
static char buff [32];
switch (binding)
{
case STB_LOCAL: return _("LOCAL");
case STB_GLOBAL: return _("GLOBAL");
case STB_WEAK: return _("WEAK");
default:
if (binding >= STB_LOPROC && binding <= STB_HIPROC)
sprintf (buff, _("<processor specific>: %d"), binding);
else
sprintf (buff, _("<unknown>: %d"), binding);
return buff;
}
}
static char *
get_symbol_type (type)
unsigned int type;
{
static char buff [32];
switch (type)
{
case STT_NOTYPE: return _("NOTYPE");
case STT_OBJECT: return _("OBJECT");
case STT_FUNC: return _("FUNC");
case STT_SECTION: return _("SECTION");
case STT_FILE: return _("FILE");
default:
if (type >= STT_LOPROC && type <= STT_HIPROC)
sprintf (buff, _("<processor specific>: %d"), type);
else
sprintf (buff, _("<unknown>: %d"), type);
return buff;
}
}
static char *
get_symbol_index_type (type)
unsigned short type;
{
switch (type)
{
case SHN_UNDEF: return "UND";
case SHN_ABS: return "ABS";
case SHN_COMMON: return "COM";
default:
if (type >= SHN_LOPROC && type <= SHN_HIPROC)
return "PRC";
else if (type >= SHN_LORESERVE && type <= SHN_HIRESERVE)
return "RSV";
else
{
static char buff [32];
sprintf (buff, "%3d", type);
return buff;
}
}
}
static int *
get_dynamic_data (file, number)
FILE * file;
unsigned int number;
{
char * e_data;
int * i_data;
e_data = (char *) malloc (number * 4);
if (e_data == NULL)
{
error (_("Out of memory\n"));
return NULL;
}
if (fread (e_data, 4, number, file) != number)
{
error (_("Unable to read in dynamic data\n"));
return NULL;
}
i_data = (int *) malloc (number * sizeof (* i_data));
if (i_data == NULL)
{
error (_("Out of memory\n"));
free (e_data);
return NULL;
}
while (number--)
i_data [number] = byte_get (e_data + number * 4, 4);
free (e_data);
return i_data;
}
/* Dump the symbol table */
static int
process_symbol_table (file)
FILE * file;
{
Elf32_Internal_Shdr * section;
if (! do_syms)
return 1;
if (dynamic_info [DT_HASH] && do_using_dynamic && dynamic_strings != NULL)
{
char nb [4];
char nc [4];
int nbuckets;
int nchains;
int * buckets;
int * chains;
int hn;
int si;
if (fseek (file, dynamic_info [DT_HASH] - loadaddr, SEEK_SET))
{
error (_("Unable to seek to start of dynamic information"));
return 0;
}
if (fread (& nb, sizeof (nb), 1, file) != 1)
{
error (_("Failed to read in number of buckets\n"));
return 0;
}
if (fread (& nc, sizeof (nc), 1, file) != 1)
{
error (_("Failed to read in number of chains\n"));
return 0;
}
nbuckets = byte_get (nb, 4);
nchains = byte_get (nc, 4);
buckets = get_dynamic_data (file, nbuckets);
chains = get_dynamic_data (file, nchains);
if (buckets == NULL || chains == NULL)
return 0;
printf (_("\nSymbol table for image:\n"));
printf (_(" Num Buc: Value Size Type Bind Ot Ndx Name\n"));
for (hn = 0; hn < nbuckets; hn++)
{
if (! buckets [hn])
continue;
for (si = buckets [hn]; si; si = chains [si])
{
Elf_Internal_Sym * psym;
psym = dynamic_symbols + si;
printf (" %3d %3d: %8lx %5ld %6s %6s %2d ",
si, hn,
(unsigned long) psym->st_value,
(unsigned long) psym->st_size,
get_symbol_type (ELF_ST_TYPE (psym->st_info)),
get_symbol_binding (ELF_ST_BIND (psym->st_info)),
psym->st_other);
printf ("%3.3s", get_symbol_index_type (psym->st_shndx));
printf (" %s\n", dynamic_strings + psym->st_name);
}
}
free (buckets);
free (chains);
}
else if (!do_using_dynamic)
{
unsigned int i;
for (i = 0, section = section_headers;
i < elf_header.e_shnum;
i++, section++)
{
unsigned int si;
char * strtab;
Elf_Internal_Sym * symtab;
Elf_Internal_Sym * psym;
if ( section->sh_type != SHT_SYMTAB
&& section->sh_type != SHT_DYNSYM)
continue;
printf (_("\nSymbol table '%s' contains %d entries:\n"),
SECTION_NAME (section),
section->sh_size / section->sh_entsize);
printf (_(" Num: Value Size Type Bind Ot Ndx Name\n"));
symtab = get_elf_symbols (file, section->sh_offset,
section->sh_size / section->sh_entsize);
if (symtab == NULL)
continue;
if (section->sh_link == elf_header.e_shstrndx)
strtab = string_table;
else
{
Elf32_Internal_Shdr * string_sec;
string_sec = section_headers + section->sh_link;
GET_DATA_ALLOC (string_sec->sh_offset, string_sec->sh_size,
strtab, char *, "string table");
}
for (si = 0, psym = symtab;
si < section->sh_size / section->sh_entsize;
si ++, psym ++)
{
printf (" %3d: %8lx %5ld %-7s %-6s %2d ",
si,
(unsigned long) psym->st_value,
(unsigned long) psym->st_size,
get_symbol_type (ELF_ST_TYPE (psym->st_info)),
get_symbol_binding (ELF_ST_BIND (psym->st_info)),
psym->st_other);
if (psym->st_shndx == 0)
printf ("UND");
else if ((psym->st_shndx & 0xffff) == 0xfff1)
printf ("ABS");
else if ((psym->st_shndx & 0xffff) == 0xfff2)
printf ("COM");
else
printf ("%3d", psym->st_shndx);
printf (" %s", strtab + psym->st_name);
if (section->sh_type == SHT_DYNSYM &&
version_info [DT_VERSIONTAGIDX (DT_VERSYM)] != 0)
{
unsigned char data[2];
unsigned short vers_data;
unsigned long offset;
int is_nobits;
int check_def;
offset = version_info [DT_VERSIONTAGIDX (DT_VERSYM)]
- loadaddr;
GET_DATA (offset + si * sizeof (vers_data), data,
"version data");
vers_data = byte_get (data, 2);
is_nobits = psym->st_shndx < SHN_LORESERVE ?
(section_headers [psym->st_shndx].sh_type == SHT_NOBITS)
: 0;
check_def = (psym->st_shndx != SHN_UNDEF);
if ((vers_data & 0x8000) || vers_data > 1)
{
if (is_nobits || ! check_def)
{
Elf_External_Verneed evn;
Elf_Internal_Verneed ivn;
Elf_Internal_Vernaux ivna;
/* We must test both. */
offset = version_info
[DT_VERSIONTAGIDX (DT_VERNEED)] - loadaddr;
GET_DATA (offset, evn, "version need");
ivn.vn_aux = BYTE_GET (evn.vn_aux);
ivn.vn_next = BYTE_GET (evn.vn_next);
do
{
unsigned long vna_off;
vna_off = offset + ivn.vn_aux;
do
{
Elf_External_Vernaux evna;
GET_DATA (vna_off, evna,
"version need aux (3)");
ivna.vna_other = BYTE_GET (evna.vna_other);
ivna.vna_next = BYTE_GET (evna.vna_next);
vna_off += ivna.vna_next;
}
while (ivna.vna_other != vers_data
&& ivna.vna_next != 0);
if (ivna.vna_other == vers_data)
break;
offset += ivn.vn_next;
}
while (ivn.vn_next != 0);
if (ivna.vna_other == vers_data)
printf ("@%s (%d)",
strtab + ivna.vna_name, ivna.vna_other);
else if (! is_nobits)
error (_("bad dynamic symbol"));
else
check_def = 1;
}
if (check_def)
{
if (vers_data != 0x8001)
{
Elf_Internal_Verdef ivd;
Elf_Internal_Verdaux ivda;
Elf_External_Verdaux evda;
unsigned long offset;
offset =
version_info [DT_VERSIONTAGIDX (DT_VERDEF)]
- loadaddr;
do
{
Elf_External_Verdef evd;
GET_DATA (offset, evd, "version def");
ivd.vd_ndx = BYTE_GET (evd.vd_ndx);
ivd.vd_aux = BYTE_GET (evd.vd_aux);
ivd.vd_next = BYTE_GET (evd.vd_next);
offset += ivd.vd_next;
}
while (ivd.vd_ndx != (vers_data & 0x7fff)
&& ivd.vd_next != 0);
offset -= ivd.vd_next;
offset += ivd.vd_aux;
GET_DATA (offset, evda, "version def aux");
ivda.vda_name = BYTE_GET (evda.vda_name);
if (psym->st_name != ivda.vda_name)
printf ((vers_data & 0x8000)
? "@%s" : "@@%s",
strtab + ivda.vda_name);
}
}
}
}
putchar ('\n');
}
free (symtab);
if (strtab != string_table)
free (strtab);
}
}
else
printf
(_("\nDynamic symbol information is not available for displaying symbols.\n"));
return 1;
}
static int
process_section_contents (file)
FILE * file;
{
Elf32_Internal_Shdr * section;
unsigned int i;
if (! do_dump)
return 1;
for (i = 0, section = section_headers;
i < elf_header.e_shnum;
i ++, section ++)
{
#ifdef SUPPORT_DISASSEMBLY
/* See if we need an assembly dump of this section */
if ((i < NUM_DUMP_SECTS) && (dump_sects[i] & DISASS_DUMP))
{
printf (_("\nAssembly dump of section %s\n"),
SECTION_NAME (section));
/* XXX -- to be done --- XXX */
}
#endif
/* See if we need a hex dump of this section. */
if ((i < NUM_DUMP_SECTS) && (dump_sects[i] & HEX_DUMP))
{
int bytes;
int addr;
unsigned char * data;
char * start;
printf (_("\nHex dump of section '%s':\n"), SECTION_NAME (section));
bytes = section->sh_size;
addr = section->sh_addr;
GET_DATA_ALLOC (section->sh_offset, bytes, start, char *,
"section data");
data = start;
while (bytes)
{
int j;
int k;
int lbytes;
lbytes = (bytes > 16 ? 16 : bytes);
printf (" 0x%8.8x ", addr);
switch (elf_header.e_ident [EI_DATA])
{
case ELFDATA2LSB:
for (j = 15; j >= 0; j --)
{
if (j < lbytes)
printf ("%2.2x", data [j]);
else
printf (" ");
if (!(j & 0x3))
printf (" ");
}
break;
case ELFDATA2MSB:
for (j = 0; j < 16; j++)
{
if (j < lbytes)
printf ("%2.2x", data [j]);
else
printf (" ");
if ((j & 3) == 3)
printf (" ");
}
break;
}
for (j = 0; j < lbytes; j++)
{
k = data [j];
if (k >= ' ' && k < 0x80)
printf ("%c", k);
else
printf (".");
}
putchar ('\n');
data += lbytes;
addr += lbytes;
bytes -= lbytes;
}
free (start);
}
}
return 1;
}
static int
get_file_header (file)
FILE * file;
{
Elf32_External_Ehdr ehdr;
if (fread (& ehdr, sizeof (ehdr), 1, file) != 1)
return 0;
memcpy (elf_header.e_ident, ehdr.e_ident, EI_NIDENT);
if (elf_header.e_ident [EI_DATA] == ELFDATA2LSB)
byte_get = byte_get_little_endian;
else
byte_get = byte_get_big_endian;
elf_header.e_entry = BYTE_GET (ehdr.e_entry);
elf_header.e_phoff = BYTE_GET (ehdr.e_phoff);
elf_header.e_shoff = BYTE_GET (ehdr.e_shoff);
elf_header.e_version = BYTE_GET (ehdr.e_version);
elf_header.e_flags = BYTE_GET (ehdr.e_flags);
elf_header.e_type = BYTE_GET (ehdr.e_type);
elf_header.e_machine = BYTE_GET (ehdr.e_machine);
elf_header.e_ehsize = BYTE_GET (ehdr.e_ehsize);
elf_header.e_phentsize = BYTE_GET (ehdr.e_phentsize);
elf_header.e_phnum = BYTE_GET (ehdr.e_phnum);
elf_header.e_shentsize = BYTE_GET (ehdr.e_shentsize);
elf_header.e_shnum = BYTE_GET (ehdr.e_shnum);
elf_header.e_shstrndx = BYTE_GET (ehdr.e_shstrndx);
return 1;
}
static void
process_file (file_name)
char * file_name;
{
FILE * file;
struct stat statbuf;
unsigned int i;
if (stat (file_name, & statbuf) < 0)
{
error (_("Cannot stat input file %s.\n"), file_name);
return;
}
file = fopen (file_name, "rb");
if (file == NULL)
{
error (_("Input file %s not found.\n"), file_name);
return;
}
if (! get_file_header (file))
{
error (_("%s: Failed to read file header\n"), file_name);
fclose (file);
return;
}
/* Initialise per file variables. */
for (i = NUM_ELEM (version_info); i--;)
version_info [i] = 0;
for (i = NUM_ELEM (dynamic_info); i--;)
dynamic_info [i] = 0;
/* Process the file. */
if (show_name)
printf (_("\nFile: %s\n"), file_name);
if (! process_file_header ())
{
fclose (file);
return;
}
process_section_headers (file);
process_program_headers (file);
process_dynamic_segment (file);
process_relocs (file);
process_symbol_table (file);
process_version_sections (file);
process_section_contents (file);
fclose (file);
if (section_headers)
{
free (section_headers);
section_headers = NULL;
}
if (string_table)
{
free (string_table);
string_table = NULL;
}
if (dynamic_strings)
{
free (dynamic_strings);
dynamic_strings = NULL;
}
if (dynamic_symbols)
{
free (dynamic_symbols);
dynamic_symbols = NULL;
}
}
#ifdef SUPPORT_DISASSEMBLY
/* Needed by the i386 disassembler. For extra credit, someone could
fix this so that we insert symbolic addresses here, esp for GOT/PLT
symbols */
void
print_address (unsigned int addr, FILE * outfile)
{
fprintf (outfile,"0x%8.8x", addr);
}
/* Needed by the i386 disassembler. */
void
db_task_printsym (unsigned int addr)
{
print_address (addr, stderr);
}
#endif
int
main (argc, argv)
int argc;
char ** argv;
{
parse_args (argc, argv);
if (optind < (argc - 1))
show_name = 1;
while (optind < argc)
process_file (argv [optind ++]);
return 0;
}
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