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ara-mdk / platform / external / elfutils / 84cf4183ba6f577ee01abe7f1f5a6d4b23df35a8 / . / src / readelf.c
blob: 6129e29dd49f84c764c64d6fc499d87e3d7478c1 [file] [log] [blame]
/* Print information from ELF file in human-readable form.
Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004 Red Hat, Inc.
Written by Ulrich Drepper <drepper@redhat.com>, 1999.
This program is Open Source software; you can redistribute it and/or
modify it under the terms of the Open Software License version 1.0 as
published by the Open Source Initiative.
You should have received a copy of the Open Software License along
with this program; if not, you may obtain a copy of the Open Software
License version 1.0 from http://www.opensource.org/licenses/osl.php or
by writing the Open Source Initiative c/o Lawrence Rosen, Esq.,
3001 King Ranch Road, Ukiah, CA 95482. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <argp.h>
#include <assert.h>
#include <dwarf.h>
#include <errno.h>
#include <error.h>
#include <fcntl.h>
#include <gelf.h>
#include <inttypes.h>
#include <langinfo.h>
#include <libdw.h>
#include <libebl.h>
#include <libintl.h>
#include <locale.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <sys/param.h>
#include <system.h>
#include "../libdw/libdwP.h"
#include "../libdw/memory-access.h"
/* Name and version of program. */
static void print_version (FILE *stream, struct argp_state *state);
void (*argp_program_version_hook) (FILE *, struct argp_state *) = print_version;
/* Definitions of arguments for argp functions. */
static const struct argp_option options[] =
{
{ NULL, 0, NULL, 0, N_("Output selection:") },
{ "all", 'a', NULL, 0, N_("Equivalent to: -h -l") },
{ "dynamic", 'd', NULL, 0, N_("Display the dynamic segment") },
{ "file-header", 'h', NULL, 0, N_("Display the ELF file header") },
{ "histogram", 'I', NULL, 0,
N_("Display histogram of bucket list lengths") },
{ "program-headers", 'l', NULL, 0, N_("Display the program headers") },
{ "relocs", 'r', NULL, 0, N_("Display relocations") },
{ "section-headers", 'S', NULL, 0, N_("Display the sections' header") },
{ "symbols", 's', NULL, 0, N_("Display the symbol table") },
{ "version-info", 'V', NULL, 0, N_("Display versioning information") },
{ "debug-dump", 'w', "SECTION", OPTION_ARG_OPTIONAL,
N_("Display DWARF section content. SECTION can be one of abbrev, "
"aranges, frame, info, loc, line, pubnames, str, or macinfo.") },
{ "notes", 'n', NULL, 0, N_("Display the core notes") },
{ "arch-specific", 'A', NULL, 0,
N_("Display architecture specific information (if any)") },
{ NULL, 0, NULL, 0, N_("Output control:") },
{ NULL, 0, NULL, 0, NULL }
};
/* Short description of program. */
static const char doc[] = N_("\
Print information from ELF file in human-readable form.");
/* Strings for arguments in help texts. */
static const char args_doc[] = N_("FILE...");
/* Prototype for option handler. */
static error_t parse_opt (int key, char *arg, struct argp_state *state);
/* Function to print some extra text in the help message. */
static char *more_help (int key, const char *text, void *input);
/* Data structure to communicate with argp functions. */
static struct argp argp =
{
options, parse_opt, args_doc, doc, NULL, more_help
};
/* Flags set by the option controlling the output. */
/* True if any of the control options is set. */
static bool any_control_option;
/* True if dynamic segment should be printed. */
static bool print_dynamic_table;
/* True if the file header should be printed. */
static bool print_file_header;
/* True if the program headers should be printed. */
static bool print_program_header;
/* True if relocations should be printed. */
static bool print_relocations;
/* True if the section headers should be printed. */
static bool print_section_header;
/* True if the symbol table should be printed. */
static bool print_symbol_table;
/* True if the version information should be printed. */
static bool print_version_info;
/* True if section groups should be printed. */
static bool print_section_groups;
/* True if bucket list length histogram should be printed. */
static bool print_histogram;
/* True if the architecture specific data should be printed. */
static bool print_arch;
/* True if note section content should be printed. */
static bool print_notes;
/* Select printing of debugging sections. */
static enum section_e
{
section_abbrev = 1, /* .debug_abbrev */
section_aranges = 2, /* .debug_aranges */
section_frame = 4, /* .debug_frame or .eh_frame */
section_info = 8, /* .debug_info */
section_line = 16, /* .debug_line */
section_loc = 32, /* .debug_loc */
section_pubnames = 64,/* .debug_pubnames */
section_str = 128, /* .debug_str */
section_macinfo = 256,/* .debug_macinfo */
section_all = (section_abbrev | section_aranges | section_frame
| section_info | section_line | section_loc
| section_pubnames | section_str | section_macinfo)
} print_debug_sections;
/* Number of sections in the file. */
static size_t shnum;
/* Declarations of local functions. */
static void process_file (int fd, Elf *elf, const char *prefix,
const char *fname, bool only_one);
static void process_elf_file (Elf *elf, const char *prefix, const char *fname,
bool only_one);
static void print_ehdr (Ebl *ebl, GElf_Ehdr *ehdr);
static void print_shdr (Ebl *ebl, GElf_Ehdr *ehdr);
static void print_phdr (Ebl *ebl, GElf_Ehdr *ehdr);
static void print_scngrp (Ebl *ebl, GElf_Ehdr *ehdr);
static void print_dynamic (Ebl *ebl, GElf_Ehdr *ehdr);
static void print_relocs (Ebl *ebl, GElf_Ehdr *ehdr);
static void handle_relocs_rel (Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn,
GElf_Shdr *shdr);
static void handle_relocs_rela (Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn,
GElf_Shdr *shdr);
static void print_symtab (Ebl *ebl, GElf_Ehdr *ehdr, int type);
static void handle_symtab (Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn,
GElf_Shdr *shdr);
static void print_verinfo (Ebl *ebl, GElf_Ehdr *ehdr);
static void handle_verneed (Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn,
GElf_Shdr *shdr);
static void handle_verdef (Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn,
GElf_Shdr *shdr);
static void handle_versym (Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn,
GElf_Shdr *shdr);
static void print_debug (Ebl *ebl, GElf_Ehdr *ehdr);
static void handle_hash (Ebl *ebl, GElf_Ehdr *ehdr);
static void handle_notes (Ebl *ebl, GElf_Ehdr *ehdr);
static void print_liblist (Ebl *ebl, GElf_Ehdr *ehdr);
int
main (int argc, char *argv[])
{
int remaining;
bool only_one;
/* Set locale. */
setlocale (LC_ALL, "");
/* Initialize the message catalog. */
textdomain (PACKAGE);
/* Parse and process arguments. */
argp_parse (&argp, argc, argv, 0, &remaining, NULL);
/* If no control option or no ELF file is given punt. */
if ((any_control_option == 0 && print_debug_sections == 0)
|| remaining >= argc)
{
argp_help (&argp, stdout, ARGP_HELP_SEE | ARGP_HELP_EXIT_ERR,
program_invocation_short_name);
exit (1);
}
/* Before we start tell the ELF library which version we are using. */
elf_version (EV_CURRENT);
/* Now process all the files given at the command line. */
only_one = remaining + 1 == argc;
do
{
int fd;
Elf *elf;
/* Open the file. */
fd = open (argv[remaining], O_RDONLY);
if (fd == -1)
{
error (0, errno, gettext ("cannot open input file"));
continue;
}
/* Create an `Elf' descriptor. */
elf = elf_begin (fd, ELF_C_READ_MMAP, NULL);
if (elf == NULL)
error (0, 0, gettext ("cannot generate Elf descriptor: %s\n"),
elf_errmsg (-1));
else
{
process_file (fd, elf, NULL, argv[remaining], only_one);
/* Now we can close the descriptor. */
if (elf_end (elf) != 0)
error (0, 0, gettext ("error while closing Elf descriptor: %s"),
elf_errmsg (-1));
}
close (fd);
}
while (++remaining < argc);
return error_message_count != 0;
}
/* Handle program arguments. */
static error_t
parse_opt (int key, char *arg, struct argp_state *state)
{
switch (key)
{
case 'a':
print_file_header = true;
print_program_header = true;
print_relocations = true;
print_section_header = true;
print_symbol_table = true;
print_version_info = true;
print_dynamic_table = true;
print_section_groups = true;
print_histogram = true;
print_arch = true;
print_notes = true;
any_control_option = true;
break;
case 'A':
print_arch = true;
any_control_option = true;
break;
case 'd':
print_dynamic_table = true;
any_control_option = true;
break;
case 'g':
print_section_groups = true;
any_control_option = true;
break;
case 'h':
print_file_header = true;
any_control_option = true;
break;
case 'I':
print_histogram = true;
any_control_option = true;
break;
case 'l':
print_program_header = true;
any_control_option = true;
break;
case 'n':
print_notes = true;
any_control_option = true;
break;
case 'r':
print_relocations = true;
any_control_option = true;
break;
case 'S':
print_section_header = true;
any_control_option = true;
break;
case 's':
print_symbol_table = true;
any_control_option = true;
break;
case 'V':
print_version_info = true;
any_control_option = true;
break;
case 'w':
if (arg == NULL)
print_debug_sections = section_all;
else if (strcmp (arg, "abbrev") == 0)
print_debug_sections |= section_abbrev;
else if (strcmp (arg, "aranges") == 0)
print_debug_sections |= section_aranges;
else if (strcmp (arg, "frame") == 0)
print_debug_sections |= section_frame;
else if (strcmp (arg, "info") == 0)
print_debug_sections |= section_info;
else if (strcmp (arg, "loc") == 0)
print_debug_sections |= section_loc;
else if (strcmp (arg, "line") == 0)
print_debug_sections |= section_line;
else if (strcmp (arg, "pubnames") == 0)
print_debug_sections |= section_pubnames;
else if (strcmp (arg, "str") == 0)
print_debug_sections |= section_str;
else if (strcmp (arg, "macinfo") == 0)
print_debug_sections |= section_macinfo;
else
{
fprintf (stderr, gettext ("Unknown DWARF debug section `%s'.\n"),
arg);
argp_help (&argp, stderr, ARGP_HELP_SEE,
program_invocation_short_name);
exit (1);
}
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
static char *
more_help (int key, const char *text, void *input)
{
char *buf;
switch (key)
{
case ARGP_KEY_HELP_EXTRA:
/* We print some extra information. */
if (asprintf (&buf, gettext ("Please report bugs to %s.\n"),
PACKAGE_BUGREPORT) < 0)
buf = NULL;
return buf;
default:
break;
}
return (char *) text;
}
/* Print the version information. */
static void
print_version (FILE *stream, struct argp_state *state)
{
fprintf (stream, "readelf (%s) %s\n", PACKAGE_NAME, VERSION);
fprintf (stream, gettext ("\
Copyright (C) %s Red Hat, Inc.\n\
This is free software; see the source for copying conditions. There is NO\n\
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
"), "2004");
fprintf (stream, gettext ("Written by %s.\n"), "Ulrich Drepper");
}
/* Process one file. */
static void
process_file (int fd, Elf *elf, const char *prefix, const char *fname,
bool only_one)
{
/* We can handle two types of files: ELF files and archives. */
Elf_Kind kind = elf_kind (elf);
struct stat64 st;
switch (kind)
{
case ELF_K_ELF:
/* Yes! It's an ELF file. */
process_elf_file (elf, prefix, fname, only_one);
break;
case ELF_K_AR:
{
Elf *subelf;
Elf_Cmd cmd = ELF_C_READ_MMAP;
size_t prefix_len = prefix == NULL ? 0 : strlen (prefix);
size_t fname_len = strlen (fname) + 1;
char new_prefix[prefix_len + 1 + fname_len];
char *cp = new_prefix;
/* Create the full name of the file. */
if (prefix != NULL)
{
cp = mempcpy (cp, prefix, prefix_len);
*cp++ = ':';
}
memcpy (cp, fname, fname_len);
/* It's an archive. We process each file in it. */
while ((subelf = elf_begin (fd, cmd, elf)) != NULL)
{
kind = elf_kind (subelf);
/* Call this function recursively. */
if (kind == ELF_K_ELF || kind == ELF_K_AR)
{
Elf_Arhdr *arhdr = elf_getarhdr (subelf);
assert (arhdr != NULL);
process_file (fd, subelf, new_prefix, arhdr->ar_name, false);
}
/* Get next archive element. */
cmd = elf_next (subelf);
if (elf_end (subelf) != 0)
error (0, 0,
gettext (" error while freeing sub-ELF descriptor: %s\n"),
elf_errmsg (-1));
}
}
break;
default:
if (fstat64 (fd, &st) != 0)
error (0, errno, gettext ("cannot stat input file"));
else if (st.st_size == 0)
error (0, 0, gettext ("input file is empty"));
else
/* We cannot do anything. */
error (0, 0, gettext ("\
Not an ELF file - it has the wrong magic bytes at the start"));
break;
}
}
/* Process one file. */
static void
process_elf_file (Elf *elf, const char *prefix, const char *fname,
bool only_one)
{
GElf_Ehdr ehdr_mem;
GElf_Ehdr *ehdr = gelf_getehdr (elf, &ehdr_mem);
Ebl *ebl;
/* Print the file name. */
if (!only_one)
{
if (prefix != NULL)
printf ("\n%s(%s):\n\n", prefix, fname);
else
printf ("\n%s:\n\n", fname);
}
if (ehdr == NULL)
{
error (0, 0, gettext ("cannot read ELF header: %s"), elf_errmsg (-1));
return;
}
ebl = ebl_openbackend (elf);
if (ebl == NULL)
{
error (0, errno, gettext ("cannot create EBL handle"));
return;
}
/* Determine the number of sections. */
if (elf_getshnum (ebl->elf, &shnum) < 0)
error (EXIT_FAILURE, 0,
gettext ("cannot determine number of sections: %s"),
elf_errmsg (-1));
if (print_file_header)
print_ehdr (ebl, ehdr);
if (print_section_header)
print_shdr (ebl, ehdr);
if (print_program_header)
print_phdr (ebl, ehdr);
if (print_section_groups)
print_scngrp (ebl, ehdr);
if (print_dynamic_table)
print_dynamic (ebl, ehdr);
if (print_relocations)
print_relocs (ebl, ehdr);
if (print_histogram)
handle_hash (ebl, ehdr);
if (print_symbol_table)
print_symtab (ebl, ehdr, SHT_DYNSYM);
if (print_version_info)
print_verinfo (ebl, ehdr);
if (print_symbol_table)
print_symtab (ebl, ehdr, SHT_SYMTAB);
if (print_arch)
print_liblist (ebl, ehdr);
if (print_debug_sections != 0)
print_debug (ebl, ehdr);
if (print_notes)
handle_notes (ebl, ehdr);
ebl_closebackend (ebl);
}
/* Print file type. */
static void
print_file_type (unsigned short int e_type)
{
if (e_type <= ET_CORE)
{
static const char *knowntypes[] =
{
N_("NONE (None)"),
N_("REL (Relocatable file)"),
N_("EXEC (Executable file)"),
N_("DYN (Shared object file)"),
N_("CORE (Core file)")
};
puts (gettext (knowntypes[e_type]));
}
else if (e_type >= ET_LOOS && e_type <= ET_HIOS)
printf (gettext ("OS Specific: (%x)\n"), e_type);
else if (e_type >= ET_LOPROC /* && e_type <= ET_HIPROC always true */)
printf (gettext ("Processor Specific: (%x)\n"), e_type);
else
puts ("???");
}
/* Print ELF header. */
static void
print_ehdr (Ebl *ebl, GElf_Ehdr *ehdr)
{
char buf[512];
size_t cnt;
fputs_unlocked (gettext ("ELF Header:\n Magic: "), stdout);
for (cnt = 0; cnt < EI_NIDENT; ++cnt)
printf (" %02hhx", ehdr->e_ident[cnt]);
printf (gettext ("\n Class: %s\n"),
ehdr->e_ident[EI_CLASS] == ELFCLASS32 ? "ELF32"
: ehdr->e_ident[EI_CLASS] == ELFCLASS64 ? "ELF64"
: "\?\?\?");
printf (gettext (" Data: %s\n"),
ehdr->e_ident[EI_DATA] == ELFDATA2LSB
? "2's complement, little endian"
: ehdr->e_ident[EI_DATA] == ELFDATA2MSB
? "2's complement, big endian" : "\?\?\?");
printf (gettext (" Version: %hhd %s\n"),
ehdr->e_ident[EI_VERSION],
ehdr->e_ident[EI_VERSION] == EV_CURRENT ? gettext ("(current)")
: "(\?\?\?)");
printf (gettext (" OS/ABI: %s\n"),
ebl_osabi_name (ebl, ehdr->e_ident[EI_OSABI], buf, sizeof (buf)));
printf (gettext (" ABI Version: %hhd\n"),
ehdr->e_ident[EI_ABIVERSION]);
fputs_unlocked (gettext (" Type: "), stdout);
print_file_type (ehdr->e_type);
printf (gettext (" Machine: %s\n"), ebl->name);
printf (gettext (" Version: %d %s\n"),
ehdr->e_version,
ehdr->e_version == EV_CURRENT ? gettext ("(current)") : "(\?\?\?)");
printf (gettext (" Entry point address: %#" PRIx64 "\n"),
ehdr->e_entry);
printf (gettext (" Start of program headers: %" PRId64 " %s\n"),
ehdr->e_phoff, gettext ("(bytes into file)"));
printf (gettext (" Start of section headers: %" PRId64 " %s\n"),
ehdr->e_shoff, gettext ("(bytes into file)"));
printf (gettext (" Flags: %s\n"),
ebl_machine_flag_name (ebl, ehdr->e_flags, buf, sizeof (buf)));
printf (gettext (" Size of this header: %" PRId16 " %s\n"),
ehdr->e_ehsize, gettext ("(bytes)"));
printf (gettext (" Size of program header entries: %" PRId16 " %s\n"),
ehdr->e_phentsize, gettext ("(bytes)"));
printf (gettext (" Number of program headers entries: %" PRId16 "\n"),
ehdr->e_phnum);
printf (gettext (" Size of section header entries: %" PRId16 " %s\n"),
ehdr->e_shentsize, gettext ("(bytes)"));
printf (gettext (" Number of section headers entries: %" PRId16),
ehdr->e_shnum);
if (ehdr->e_shnum == 0)
{
GElf_Shdr shdr_mem;
GElf_Shdr *shdr;
shdr = gelf_getshdr (elf_getscn (ebl->elf, 0), &shdr_mem);
if (shdr != NULL)
printf (gettext (" (%" PRIu32 " in [0].sh_size)"),
(uint32_t) shdr->sh_size);
else
fputs_unlocked (gettext (" ([0] not available)"), stdout);
}
fputc_unlocked ('\n', stdout);
if (ehdr->e_shstrndx == SHN_XINDEX)
{
GElf_Shdr shdr_mem;
GElf_Shdr *shdr;
shdr = gelf_getshdr (elf_getscn (ebl->elf, 0), &shdr_mem);
if (shdr != NULL)
/* We managed to get the zeroth section. */
snprintf (buf, sizeof (buf), gettext (" (%" PRIu32 " in [0].sh_link)"),
(uint32_t) shdr->sh_link);
else
{
strncpy (buf, gettext (" ([0] not available)"), sizeof (buf));
buf[sizeof (buf) - 1] = '\0';
}
printf (gettext (" Section header string table index: XINDEX%s\n\n"),
buf);
}
else
printf (gettext (" Section header string table index: %" PRId16 "\n\n"),
ehdr->e_shstrndx);
}
static const char *
get_visibility_type (int value)
{
switch (value)
{
case STV_DEFAULT:
return "DEFAULT";
case STV_INTERNAL:
return "INTERNAL";
case STV_HIDDEN:
return "HIDDEN";
case STV_PROTECTED:
return "PROTECTED";
default:
return "???";
}
}
/* Print the section headers. */
static void
print_shdr (Ebl *ebl, GElf_Ehdr *ehdr)
{
size_t cnt;
size_t shstrndx;
if (! print_file_header)
printf (gettext ("\
There are %d section headers, starting at offset %#" PRIx64 ":\n\
\n"),
ehdr->e_shnum, ehdr->e_shoff);
/* Get the section header string table index. */
if (elf_getshstrndx (ebl->elf, &shstrndx) < 0)
error (EXIT_FAILURE, 0,
gettext ("cannot get section header string table index"));
puts (gettext ("Section Headers:"));
if (ehdr->e_ident[EI_CLASS] == ELFCLASS32)
puts (gettext ("[Nr] Name Type Addr Off Size ES Flags Lk Inf Al"));
else
puts (gettext ("[Nr] Name Type Addr Off Size ES Flags Lk Inf Al"));
for (cnt = 0; cnt < shnum; ++cnt)
{
char buf[128];
char flagbuf[20];
char *cp;
Elf_Scn *scn = elf_getscn (ebl->elf, cnt);
GElf_Shdr shdr_mem;
GElf_Shdr *shdr;
if (scn == NULL)
error (EXIT_FAILURE, 0, gettext ("cannot get section: %s"),
elf_errmsg (-1));
/* Get the section header. */
shdr = gelf_getshdr (scn, &shdr_mem);
if (shdr == NULL)
error (EXIT_FAILURE, 0, gettext ("cannot get section header: %s"),
elf_errmsg (-1));
cp = flagbuf;
if (shdr->sh_flags & SHF_WRITE)
*cp++ = 'W';
if (shdr->sh_flags & SHF_ALLOC)
*cp++ = 'A';
if (shdr->sh_flags & SHF_EXECINSTR)
*cp++ = 'X';
if (shdr->sh_flags & SHF_MERGE)
*cp++ = 'M';
if (shdr->sh_flags & SHF_STRINGS)
*cp++ = 'S';
if (shdr->sh_flags & SHF_INFO_LINK)
*cp++ = 'I';
if (shdr->sh_flags & SHF_LINK_ORDER)
*cp++ = 'L';
if (shdr->sh_flags & SHF_OS_NONCONFORMING)
*cp++ = 'N';
if (shdr->sh_flags & SHF_GROUP)
*cp++ = 'G';
if (shdr->sh_flags & SHF_TLS)
*cp++ = 'T';
if (shdr->sh_flags & SHF_ORDERED)
*cp++ = 'O';
if (shdr->sh_flags & SHF_EXCLUDE)
*cp++ = 'E';
*cp = '\0';
printf ("[%2zu] %-20s %-12s %0*" PRIx64 " %0*" PRIx64 " %0*" PRIx64
" %2" PRId64 " %-5s %2" PRId32 " %3" PRId32
" %2" PRId64 "\n",
cnt,
elf_strptr (ebl->elf, shstrndx, shdr->sh_name)
?: "<corrupt>",
ebl_section_type_name (ebl, shdr->sh_type, buf, sizeof (buf)),
ehdr->e_ident[EI_CLASS] == ELFCLASS32 ? 8 : 16, shdr->sh_addr,
ehdr->e_ident[EI_CLASS] == ELFCLASS32 ? 6 : 8, shdr->sh_offset,
ehdr->e_ident[EI_CLASS] == ELFCLASS32 ? 6 : 8, shdr->sh_size,
shdr->sh_entsize, flagbuf, shdr->sh_link, shdr->sh_info,
shdr->sh_addralign);
}
fputc_unlocked ('\n', stdout);
}
/* Print the program header. */
static void
print_phdr (Ebl *ebl, GElf_Ehdr *ehdr)
{
size_t cnt;
size_t shstrndx;
if (ehdr->e_phnum == 0)
/* No program header, this is OK in relocatable objects. */
return;
puts (gettext ("Program Headers:"));
if (ehdr->e_ident[EI_CLASS] == ELFCLASS32)
puts (gettext ("\
Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align"));
else
puts (gettext ("\
Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align"));
/* Process all program headers. */
bool has_relro = false;
GElf_Addr relro_from = 0;
GElf_Addr relro_to = 0;
for (cnt = 0; cnt < ehdr->e_phnum; ++cnt)
{
char buf[128];
GElf_Phdr mem;
GElf_Phdr *phdr = gelf_getphdr (ebl->elf, cnt, &mem);
/* If for some reason the header cannot be returned show this. */
if (phdr == NULL)
{
puts (" ???");
continue;
}
printf (" %-14s 0x%06" PRIx64 " 0x%0*" PRIx64 " 0x%0*" PRIx64
" 0x%06" PRIx64 " 0x%06" PRIx64 " %c%c%c 0x%" PRIx64 "\n",
ebl_segment_type_name (ebl, phdr->p_type, buf, sizeof (buf)),
phdr->p_offset,
ehdr->e_ident[EI_CLASS] == ELFCLASS32 ? 8 : 16, phdr->p_vaddr,
ehdr->e_ident[EI_CLASS] == ELFCLASS32 ? 8 : 16, phdr->p_paddr,
phdr->p_filesz,
phdr->p_memsz,
phdr->p_flags & PF_R ? 'R' : ' ',
phdr->p_flags & PF_W ? 'W' : ' ',
phdr->p_flags & PF_X ? 'E' : ' ',
phdr->p_align);
if (phdr->p_type == PT_INTERP)
{
/* We can show the user the name of the interpreter. */
size_t maxsize;
char *filedata = elf_rawfile (ebl->elf, &maxsize);
if (filedata != NULL && phdr->p_offset < maxsize)
printf (gettext ("\t[Requesting program interpreter: %s]\n"),
filedata + phdr->p_offset);
}
else if (phdr->p_type == PT_GNU_RELRO)
{
has_relro = true;
relro_from = phdr->p_vaddr;
relro_to = relro_from + phdr->p_memsz;
}
}
/* Get the section header string table index. */
if (elf_getshstrndx (ebl->elf, &shstrndx) < 0)
error (EXIT_FAILURE, 0,
gettext ("cannot get section header string table index"));
puts (gettext ("\n Section to Segment mapping:\n Segment Sections..."));
for (cnt = 0; cnt < ehdr->e_phnum; ++cnt)
{
GElf_Phdr phdr_mem;
GElf_Phdr *phdr = gelf_getphdr (ebl->elf, cnt, &phdr_mem);
size_t inner;
/* Print the segment number. */
printf (" %2.2zu ", cnt);
/* This must not happen. */
if (phdr == NULL)
error (EXIT_FAILURE, 0, gettext ("cannot get program header: %s"),
elf_errmsg (-1));
/* Iterate over the sections. */
bool in_relro = false;
for (inner = 1; inner < shnum; ++inner)
{
Elf_Scn *scn = elf_getscn (ebl->elf, inner);
GElf_Shdr shdr_mem;
GElf_Shdr *shdr;
/* It should not happen. */
if (scn == NULL)
error (EXIT_FAILURE, 0, gettext ("cannot get section: %s"),
elf_errmsg (-1));
/* Get the section header. */
shdr = gelf_getshdr (scn, &shdr_mem);
if (shdr == NULL)
error (EXIT_FAILURE, 0,
gettext ("cannot get section header: %s"),
elf_errmsg (-1));
if (shdr->sh_size > 0
/* Compare allocated sections by VMA, unallocated
sections by file offset. */
&& (shdr->sh_flags & SHF_ALLOC
? (shdr->sh_addr >= phdr->p_vaddr
&& (shdr->sh_addr + shdr->sh_size
<= phdr->p_vaddr + phdr->p_memsz))
: (shdr->sh_offset >= phdr->p_offset
&& (shdr->sh_offset + shdr->sh_size
<= phdr->p_offset + phdr->p_filesz))))
{
if (has_relro && !in_relro
&& shdr->sh_addr >= relro_from
&& shdr->sh_addr + shdr->sh_size <= relro_to)
{
fputs_unlocked (" [RELRO:", stdout);
in_relro = true;
}
else if (has_relro && in_relro && shdr->sh_addr >= relro_to)
{
fputs_unlocked ("]", stdout);
in_relro = false;
}
else if (has_relro && in_relro
&& shdr->sh_addr + shdr->sh_size > relro_to)
fputs_unlocked ("] <RELRO:", stdout);
printf (" %s",
elf_strptr (ebl->elf, shstrndx, shdr->sh_name));
/* Signal that this sectin is only partially covered. */
if (has_relro && in_relro
&& shdr->sh_addr + shdr->sh_size > relro_to)
{
fputs_unlocked (">", stdout);
in_relro = false;
}
}
}
if (in_relro)
fputs_unlocked ("]", stdout);
/* Finish the line. */
fputc_unlocked ('\n', stdout);
}
}
static void
handle_scngrp (Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn, GElf_Shdr *shdr)
{
Elf_Data *data;
Elf32_Word *grpref;
Elf_Scn *symscn;
GElf_Shdr symshdr_mem;
GElf_Shdr *symshdr;
Elf_Data *symdata;
GElf_Sym sym_mem;
size_t cnt;
size_t shstrndx;
/* Get the data of the section. */
data = elf_getdata (scn, NULL);
symscn = elf_getscn (ebl->elf, shdr->sh_link);
symshdr = gelf_getshdr (symscn, &symshdr_mem);
symdata = elf_getdata (symscn, NULL);
if (data == NULL || data->d_size < sizeof (Elf32_Word) || symshdr == NULL
|| symdata == NULL)
return;
/* Get the section header string table index. */
if (elf_getshstrndx (ebl->elf, &shstrndx) < 0)
error (EXIT_FAILURE, 0,
gettext ("cannot get section header string table index"));
grpref = (Elf32_Word *) data->d_buf;
printf ((grpref[0] & GRP_COMDAT)
? ngettext ("\
\nCOMDAT section group [%2zu] '%s' with signature '%s' contains %zu entry:\n",
"\
\nCOMDAT section group [%2zu] '%s' with signature '%s' contains %zu entries:\n",
data->d_size / sizeof (Elf32_Word) - 1)
: ngettext ("\
\nSection group [%2zu] '%s' with signature '%s' contains %zu entry:\n", "\
\nSection group [%2zu] '%s' with signature '%s' contains %zu entries:\n",
data->d_size / sizeof (Elf32_Word) - 1),
elf_ndxscn (scn),
elf_strptr (ebl->elf, shstrndx, shdr->sh_name),
elf_strptr (ebl->elf, symshdr->sh_link,
gelf_getsym (symdata, shdr->sh_info, &sym_mem)->st_name)
?: gettext ("<INVALID SYMBOL>"),
data->d_size / sizeof (Elf32_Word) - 1);
for (cnt = 1; cnt < data->d_size / sizeof (Elf32_Word); ++cnt)
{
GElf_Shdr grpshdr_mem;
GElf_Shdr *grpshdr;
grpshdr = gelf_getshdr (elf_getscn (ebl->elf, grpref[cnt]),
&grpshdr_mem);
if (grpshdr == NULL)
printf (gettext (" [%2u] <INVALID SECTION>\n"), grpref[cnt]);
else
printf (" [%2u] %s\n",
grpref[cnt],
elf_strptr (ebl->elf, shstrndx, grpshdr->sh_name)
?: gettext ("<INVALID SECTION>"));
}
}
static void
print_scngrp (Ebl *ebl, GElf_Ehdr *ehdr)
{
/* Find all relocation sections and handle them. */
Elf_Scn *scn = NULL;
while ((scn = elf_nextscn (ebl->elf, scn)) != NULL)
{
/* Handle the section if it is a symbol table. */
GElf_Shdr shdr_mem;
GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
if (shdr != NULL && shdr->sh_type == SHT_GROUP)
handle_scngrp (ebl, ehdr, scn, shdr);
}
}
static const struct flags
{
int mask;
const char *str;
} dt_flags[] =
{
{ DF_ORIGIN, "ORIGIN" },
{ DF_SYMBOLIC, "SYMBOLIC" },
{ DF_TEXTREL, "TEXTREL" },
{ DF_BIND_NOW, "BIND_NOW" },
{ DF_STATIC_TLS, "STATIC_TLS" }
};
static const int ndt_flags = sizeof (dt_flags) / sizeof (dt_flags[0]);
static const struct flags dt_flags_1[] =
{
{ DF_1_NOW, "NOW" },
{ DF_1_GLOBAL, "GLOBAL" },
{ DF_1_GROUP, "GROUP" },
{ DF_1_NODELETE, "NODELETE" },
{ DF_1_LOADFLTR, "LOADFLTR" },
{ DF_1_INITFIRST, "INITFIRST" },
{ DF_1_NOOPEN, "NOOPEN" },
{ DF_1_ORIGIN, "ORIGIN" },
{ DF_1_DIRECT, "DIRECT" },
{ DF_1_TRANS, "TRANS" },
{ DF_1_INTERPOSE, "INTERPOSE" },
{ DF_1_NODEFLIB, "NODEFLIB" },
{ DF_1_NODUMP, "NODUMP" },
{ DF_1_CONFALT, "CONFALT" },
{ DF_1_ENDFILTEE, "ENDFILTEE" },
{ DF_1_DISPRELDNE, "DISPRELDNE" },
{ DF_1_DISPRELPND, "DISPRELPND" },
};
static const int ndt_flags_1 = sizeof (dt_flags_1) / sizeof (dt_flags_1[0]);
static const struct flags dt_feature_1[] =
{
{ DTF_1_PARINIT, "PARINIT" },
{ DTF_1_CONFEXP, "CONFEXP" }
};
static const int ndt_feature_1 = (sizeof (dt_feature_1)
/ sizeof (dt_feature_1[0]));
static const struct flags dt_posflag_1[] =
{
{ DF_P1_LAZYLOAD, "LAZYLOAD" },
{ DF_P1_GROUPPERM, "GROUPPERM" }
};
static const int ndt_posflag_1 = (sizeof (dt_posflag_1)
/ sizeof (dt_posflag_1[0]));
static void
print_flags (int class, GElf_Xword d_val, const struct flags *flags,
int nflags)
{
bool first = true;
int cnt;
for (cnt = 0; cnt < nflags; ++cnt)
if (d_val & flags[cnt].mask)
{
if (!first)
putchar_unlocked (' ');
fputs_unlocked (flags[cnt].str, stdout);
d_val &= ~flags[cnt].mask;
first = false;
}
if (d_val != 0)
{
if (!first)
putchar_unlocked (' ');
printf ("%#0*" PRIx64, class == ELFCLASS32 ? 10 : 18, d_val);
}
putchar_unlocked ('\n');
}
static void
print_dt_flags (int class, GElf_Xword d_val)
{
print_flags (class, d_val, dt_flags, ndt_flags);
}
static void
print_dt_flags_1 (int class, GElf_Xword d_val)
{
print_flags (class, d_val, dt_flags_1, ndt_flags_1);
}
static void
print_dt_feature_1 (int class, GElf_Xword d_val)
{
print_flags (class, d_val, dt_feature_1, ndt_feature_1);
}
static void
print_dt_posflag_1 (int class, GElf_Xword d_val)
{
print_flags (class, d_val, dt_posflag_1, ndt_posflag_1);
}
static void
handle_dynamic (Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn, GElf_Shdr *shdr)
{
int class = gelf_getclass (ebl->elf);
GElf_Shdr glink;
Elf_Data *data;
size_t cnt;
size_t shstrndx;
/* Get the data of the section. */
data = elf_getdata (scn, NULL);
if (data == NULL)
return;
/* Get the section header string table index. */
if (elf_getshstrndx (ebl->elf, &shstrndx) < 0)
error (EXIT_FAILURE, 0,
gettext ("cannot get section header string table index"));
printf (ngettext ("\
\nDynamic segment contains %lu entry:\n Addr: %#0*" PRIx64 " Offset: %#08" PRIx64 " Link to section: [%2u] '%s'\n",
"\
\nDynamic segment contains %lu entries:\n Addr: %#0*" PRIx64 " Offset: %#08" PRIx64 " Link to section: [%2u] '%s'\n",
shdr->sh_size / shdr->sh_entsize),
(unsigned long int) (shdr->sh_size / shdr->sh_entsize),
class == ELFCLASS32 ? 10 : 18, shdr->sh_addr,
shdr->sh_offset,
(int) shdr->sh_link,
elf_strptr (ebl->elf, shstrndx,
gelf_getshdr (elf_getscn (ebl->elf, shdr->sh_link),
&glink)->sh_name));
fputs_unlocked (gettext (" Type Value\n"), stdout);
for (cnt = 0; cnt < shdr->sh_size / shdr->sh_entsize; ++cnt)
{
char buf[64];
GElf_Dyn dynmem;
GElf_Dyn *dyn;
dyn = gelf_getdyn (data, cnt, &dynmem);
if (dyn == NULL)
break;
printf (" %-17s ",
ebl_dynamic_tag_name (ebl, dyn->d_tag, buf, sizeof (buf)));
switch (dyn->d_tag)
{
case DT_NULL:
case DT_DEBUG:
case DT_BIND_NOW:
case DT_TEXTREL:
/* No further output. */
fputc ('\n', stdout);
break;
case DT_NEEDED:
printf (gettext ("Shared library: [%s]\n"),
elf_strptr (ebl->elf, shdr->sh_link, dyn->d_un.d_val));
break;
case DT_SONAME:
printf (gettext ("Library soname: [%s]\n"),
elf_strptr (ebl->elf, shdr->sh_link, dyn->d_un.d_val));
break;
case DT_RPATH:
printf (gettext ("Library rpath: [%s]\n"),
elf_strptr (ebl->elf, shdr->sh_link, dyn->d_un.d_val));
break;
case DT_RUNPATH:
printf (gettext ("Library runpath: [%s]\n"),
elf_strptr (ebl->elf, shdr->sh_link, dyn->d_un.d_val));
break;
case DT_PLTRELSZ:
case DT_RELASZ:
case DT_STRSZ:
case DT_RELSZ:
case DT_RELAENT:
case DT_SYMENT:
case DT_RELENT:
case DT_PLTPADSZ:
case DT_MOVEENT:
case DT_MOVESZ:
case DT_INIT_ARRAYSZ:
case DT_FINI_ARRAYSZ:
case DT_SYMINSZ:
case DT_SYMINENT:
case DT_GNU_CONFLICTSZ:
case DT_GNU_LIBLISTSZ:
printf (gettext ("%" PRId64 " (bytes)\n"), dyn->d_un.d_val);
break;
case DT_VERDEFNUM:
case DT_VERNEEDNUM:
case DT_RELACOUNT:
case DT_RELCOUNT:
printf ("%" PRId64 "\n", dyn->d_un.d_val);
break;
case DT_PLTREL:
puts (ebl_dynamic_tag_name (ebl, dyn->d_un.d_val, NULL, 0));
break;
case DT_FLAGS:
print_dt_flags (class, dyn->d_un.d_val);
break;
case DT_FLAGS_1:
print_dt_flags_1 (class, dyn->d_un.d_val);
break;
case DT_FEATURE_1:
print_dt_feature_1 (class, dyn->d_un.d_val);
break;
case DT_POSFLAG_1:
print_dt_posflag_1 (class, dyn->d_un.d_val);
break;
default:
printf ("%#0*" PRIx64 "\n",
class == ELFCLASS32 ? 10 : 18, dyn->d_un.d_val);
break;
}
}
}
/* Print the dynamic segment. */
static void
print_dynamic (Ebl *ebl, GElf_Ehdr *ehdr)
{
/* Find all relocation sections and handle them. */
Elf_Scn *scn = NULL;
while ((scn = elf_nextscn (ebl->elf, scn)) != NULL)
{
/* Handle the section if it is a symbol table. */
GElf_Shdr shdr_mem;
GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
if (shdr != NULL && shdr->sh_type == SHT_DYNAMIC)
{
handle_dynamic (ebl, ehdr, scn, shdr);
break;
}
}
}
/* Print relocations. */
static void
print_relocs (Ebl *ebl, GElf_Ehdr *ehdr)
{
/* Find all relocation sections and handle them. */
Elf_Scn *scn = NULL;
while ((scn = elf_nextscn (ebl->elf, scn)) != NULL)
{
/* Handle the section if it is a symbol table. */
GElf_Shdr shdr_mem;
GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
if (shdr != NULL)
{
if (shdr->sh_type == SHT_REL)
handle_relocs_rel (ebl, ehdr, scn, shdr);
else if (shdr->sh_type == SHT_RELA)
handle_relocs_rela (ebl, ehdr, scn, shdr);
}
}
}
/* Handle a relocation section. */
static void
handle_relocs_rel (Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn, GElf_Shdr *shdr)
{
int class = gelf_getclass (ebl->elf);
int nentries = shdr->sh_size / shdr->sh_entsize;
int cnt;
Elf_Data *data;
Elf_Scn *symscn;
GElf_Shdr symshdr_mem;
GElf_Shdr *symshdr;
Elf_Data *symdata;
GElf_Shdr destshdr_mem;
GElf_Shdr *destshdr;
Elf_Scn *xndxscn;
Elf_Data *xndxdata = NULL;
size_t shstrndx;
/* Get the data of the section. */
data = elf_getdata (scn, NULL);
if (data == NULL)
return;
/* Get the symbol table information. */
symscn = elf_getscn (ebl->elf, shdr->sh_link);
symshdr = gelf_getshdr (symscn, &symshdr_mem);
symdata = elf_getdata (symscn, NULL);
/* Get the section header of the section the relocations are for. */
destshdr = gelf_getshdr (elf_getscn (ebl->elf, shdr->sh_info),
&destshdr_mem);
if (symshdr == NULL || symdata == NULL || destshdr == NULL)
{
printf (gettext ("\nInvalid symbol table at offset %#0" PRIx64 "\n"),
shdr->sh_offset);
return;
}
/* Search for the optional extended section index table. */
xndxscn = NULL;
while ((xndxscn = elf_nextscn (ebl->elf, xndxscn)) != NULL)
{
GElf_Shdr xndxshdr_mem;
GElf_Shdr *xndxshdr;
xndxshdr = gelf_getshdr (xndxscn, &xndxshdr_mem);
if (xndxshdr != NULL && xndxshdr->sh_type == SHT_SYMTAB_SHNDX
&& xndxshdr->sh_link == elf_ndxscn (symscn))
{
/* Found it. */
xndxdata = elf_getdata (xndxscn, NULL);
break;
}
}
/* Get the section header string table index. */
if (elf_getshstrndx (ebl->elf, &shstrndx) < 0)
error (EXIT_FAILURE, 0,
gettext ("cannot get section header string table index"));
if (shdr->sh_info != 0)
printf (ngettext ("\
\nRelocation section [%2u] '%s' for section [%2u] '%s' at offset %#0" PRIx64 " contains %d entry:\n",
"\
\nRelocation section [%2u] '%s' for section [%2u] '%s' at offset %#0" PRIx64 " contains %d entries:\n",
nentries),
(unsigned int) elf_ndxscn (scn),
elf_strptr (ebl->elf, shstrndx, shdr->sh_name),
(unsigned int) shdr->sh_info,
elf_strptr (ebl->elf, shstrndx, destshdr->sh_name),
shdr->sh_offset,
nentries);
else
/* The .rel.dyn section does not refer to a specific section but
instead of section index zero. Do not try to print a section
name. */
printf (ngettext ("\
\nRelocation section [%2u] '%s' at offset %#0" PRIx64 " contains %d entry:\n",
"\
\nRelocation section [%2u] '%s' at offset %#0" PRIx64 " contains %d entries:\n",
nentries),
(unsigned int) elf_ndxscn (scn),
elf_strptr (ebl->elf, shstrndx, shdr->sh_name),
shdr->sh_offset,
nentries);
fputs_unlocked (class == ELFCLASS32
? gettext ("\
Offset Type Value Name\n")
: gettext ("\
Offset Type Value Name\n"),
stdout);
for (cnt = 0; cnt < nentries; ++cnt)
{
GElf_Rel relmem;
GElf_Rel *rel;
rel = gelf_getrel (data, cnt, &relmem);
if (rel != NULL)
{
char buf[128];
GElf_Sym symmem;
GElf_Sym *sym;
Elf32_Word xndx;
sym = gelf_getsymshndx (symdata, xndxdata, GELF_R_SYM (rel->r_info),
&symmem, &xndx);
if (sym == NULL)
printf (" %#0*" PRIx64 " %-20s <%s %ld>\n",
class == ELFCLASS32 ? 10 : 18, rel->r_offset,
ebl_reloc_type_check (ebl, GELF_R_TYPE (rel->r_info))
/* Avoid the leading R_ which isn't carrying any
information. */
? ebl_reloc_type_name (ebl, GELF_R_TYPE (rel->r_info),
buf, sizeof (buf)) + 2
: gettext ("<INVALID RELOC>"),
gettext ("INVALID SYMBOL"),
(long int) GELF_R_SYM (rel->r_info));
else if (GELF_ST_TYPE (sym->st_info) != STT_SECTION)
printf (" %#0*" PRIx64 " %-20s %#0*" PRIx64 " %s\n",
class == ELFCLASS32 ? 10 : 18, rel->r_offset,
ebl_reloc_type_check (ebl, GELF_R_TYPE (rel->r_info))
/* Avoid the leading R_ which isn't carrying any
information. */
? ebl_reloc_type_name (ebl, GELF_R_TYPE (rel->r_info),
buf, sizeof (buf)) + 2
: gettext ("<INVALID RELOC>"),
class == ELFCLASS32 ? 10 : 18, sym->st_value,
elf_strptr (ebl->elf, symshdr->sh_link, sym->st_name));
else
{
destshdr = gelf_getshdr (elf_getscn (ebl->elf,
sym->st_shndx == SHN_XINDEX
? xndx : sym->st_shndx),
&destshdr_mem);
if (shdr == NULL)
printf (" %#0*" PRIx64 " %-20s <%s %ld>\n",
class == ELFCLASS32 ? 10 : 18, rel->r_offset,
ebl_reloc_type_check (ebl, GELF_R_TYPE (rel->r_info))
/* Avoid the leading R_ which isn't carrying any
information. */
? ebl_reloc_type_name (ebl, GELF_R_TYPE (rel->r_info),
buf, sizeof (buf)) + 2
: gettext ("<INVALID RELOC>"),
gettext ("INVALID SECTION"),
(long int) (sym->st_shndx == SHN_XINDEX
? xndx : sym->st_shndx));
else
printf (" %#0*" PRIx64 " %-20s %#0*" PRIx64 " %s\n",
class == ELFCLASS32 ? 10 : 18, rel->r_offset,
ebl_reloc_type_check (ebl, GELF_R_TYPE (rel->r_info))
/* Avoid the leading R_ which isn't carrying any
information. */
? ebl_reloc_type_name (ebl, GELF_R_TYPE (rel->r_info),
buf, sizeof (buf)) + 2
: gettext ("<INVALID RELOC>"),
class == ELFCLASS32 ? 10 : 18, sym->st_value,
elf_strptr (ebl->elf, shstrndx, destshdr->sh_name));
}
}
}
}
/* Handle a relocation section. */
static void
handle_relocs_rela (Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn, GElf_Shdr *shdr)
{
int class = gelf_getclass (ebl->elf);
int nentries = shdr->sh_size / shdr->sh_entsize;
/* Get the data of the section. */
Elf_Data *data = elf_getdata (scn, NULL);
if (data == NULL)
return;
/* Get the symbol table information. */
Elf_Scn *symscn = elf_getscn (ebl->elf, shdr->sh_link);
GElf_Shdr symshdr_mem;
GElf_Shdr *symshdr = gelf_getshdr (symscn, &symshdr_mem);
Elf_Data *symdata = elf_getdata (symscn, NULL);
/* Get the section header of the section the relocations are for. */
GElf_Shdr destshdr_mem;
GElf_Shdr *destshdr = gelf_getshdr (elf_getscn (ebl->elf, shdr->sh_info),
&destshdr_mem);
if (symshdr == NULL || symdata == NULL || destshdr == NULL)
{
printf (gettext ("\nInvalid symbol table at offset %#0" PRIx64 "\n"),
shdr->sh_offset);
return;
}
/* Search for the optional extended section index table. */
Elf_Data *xndxdata = NULL;
Elf_Scn *xndxscn = NULL;
while ((xndxscn = elf_nextscn (ebl->elf, xndxscn)) != NULL)
{
GElf_Shdr xndxshdr_mem;
GElf_Shdr *xndxshdr;
xndxshdr = gelf_getshdr (xndxscn, &xndxshdr_mem);
if (xndxshdr != NULL && xndxshdr->sh_type == SHT_SYMTAB_SHNDX
&& xndxshdr->sh_link == elf_ndxscn (symscn))
{
/* Found it. */
xndxdata = elf_getdata (xndxscn, NULL);
break;
}
}
/* Get the section header string table index. */
size_t shstrndx;
if (elf_getshstrndx (ebl->elf, &shstrndx) < 0)
error (EXIT_FAILURE, 0,
gettext ("cannot get section header string table index"));
printf (ngettext ("\
\nRelocation section [%2zu] '%s' for section [%2u] '%s' at offset %#0" PRIx64 " contains %d entry:\n",
"\
\nRelocation section [%2zu] '%s' for section [%2u] '%s' at offset %#0" PRIx64 " contains %d entries:\n",
nentries),
elf_ndxscn (scn),
elf_strptr (ebl->elf, shstrndx, shdr->sh_name),
(unsigned int) shdr->sh_info,
elf_strptr (ebl->elf, shstrndx, destshdr->sh_name),
shdr->sh_offset,
nentries);
fputs_unlocked (class == ELFCLASS32
? gettext ("\
Offset Type Value Addend Name\n")
: gettext ("\
Offset Type Value Addend Name\n"),
stdout);
for (int cnt = 0; cnt < nentries; ++cnt)
{
GElf_Rela relmem;
GElf_Rela *rel = gelf_getrela (data, cnt, &relmem);
if (rel != NULL)
{
char buf[64];
GElf_Sym symmem;
GElf_Sym *sym;
Elf32_Word xndx;
sym = gelf_getsymshndx (symdata, xndxdata, GELF_R_SYM (rel->r_info),
&symmem, &xndx);
if (sym == NULL)
printf (" %#0*" PRIx64 " %-15s <%s %ld>\n",
class == ELFCLASS32 ? 10 : 18, rel->r_offset,
ebl_reloc_type_check (ebl, GELF_R_TYPE (rel->r_info))
/* Avoid the leading R_ which isn't carrying any
information. */
? ebl_reloc_type_name (ebl, GELF_R_TYPE (rel->r_info),
buf, sizeof (buf)) + 2
: gettext ("<INVALID RELOC>"),
gettext ("INVALID SYMBOL"),
(long int) GELF_R_SYM (rel->r_info));
else if (GELF_ST_TYPE (sym->st_info) != STT_SECTION)
printf ("\
%#0*" PRIx64 " %-15s %#0*" PRIx64 " +%5" PRId64 " %s\n",
class == ELFCLASS32 ? 10 : 18, rel->r_offset,
ebl_reloc_type_check (ebl, GELF_R_TYPE (rel->r_info))
/* Avoid the leading R_ which isn't carrying any
information. */
? ebl_reloc_type_name (ebl, GELF_R_TYPE (rel->r_info),
buf, sizeof (buf)) + 2
: gettext ("<INVALID RELOC>"),
class == ELFCLASS32 ? 10 : 18, sym->st_value,
rel->r_addend,
elf_strptr (ebl->elf, symshdr->sh_link, sym->st_name));
else
{
destshdr = gelf_getshdr (elf_getscn (ebl->elf,
sym->st_shndx == SHN_XINDEX
? xndx : sym->st_shndx),
&destshdr_mem);
if (shdr == NULL)
printf (" %#0*" PRIx64 " %-15s <%s %ld>\n",
class == ELFCLASS32 ? 10 : 18, rel->r_offset,
ebl_reloc_type_check (ebl, GELF_R_TYPE (rel->r_info))
/* Avoid the leading R_ which isn't carrying any
information. */
? ebl_reloc_type_name (ebl, GELF_R_TYPE (rel->r_info),
buf, sizeof (buf)) + 2
: gettext ("<INVALID RELOC>"),
gettext ("INVALID SECTION"),
(long int) (sym->st_shndx == SHN_XINDEX
? xndx : sym->st_shndx));
else
printf ("\
%#0*" PRIx64 " %-15s %#0*" PRIx64 " +%5" PRId64 " %s\n",
class == ELFCLASS32 ? 10 : 18, rel->r_offset,
ebl_reloc_type_check (ebl, GELF_R_TYPE (rel->r_info))
/* Avoid the leading R_ which isn't carrying any
information. */
? ebl_reloc_type_name (ebl, GELF_R_TYPE (rel->r_info),
buf, sizeof (buf)) + 2
: gettext ("<INVALID RELOC>"),
class == ELFCLASS32 ? 10 : 18, sym->st_value,
rel->r_addend,
elf_strptr (ebl->elf, shstrndx, destshdr->sh_name));
}
}
}
}
/* Print the program header. */
static void
print_symtab (Ebl *ebl, GElf_Ehdr *ehdr, int type)
{
/* Find the symbol table(s). For this we have to search through the
section table. */
Elf_Scn *scn = NULL;
while ((scn = elf_nextscn (ebl->elf, scn)) != NULL)
{
/* Handle the section if it is a symbol table. */
GElf_Shdr shdr_mem;
GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
if (shdr != NULL && shdr->sh_type == (GElf_Word) type)
handle_symtab (ebl, ehdr, scn, shdr);
}
}
static void
handle_symtab (Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn, GElf_Shdr *shdr)
{
Elf_Data *versym_data = NULL;
Elf_Data *verneed_data = NULL;
Elf_Data *verdef_data = NULL;
Elf_Data *xndx_data = NULL;
Elf_Scn *runscn;
Elf_Data *data;
int class = gelf_getclass (ebl->elf);
unsigned int nsyms;
unsigned int cnt;
Elf32_Word verneed_stridx = 0;
Elf32_Word verdef_stridx = 0;
GElf_Shdr glink;
size_t shstrndx;
/* Get the data of the section. */
data = elf_getdata (scn, NULL);
if (data == NULL)
return;
/* Find out whether we have other sections we might need. */
runscn = NULL;
while ((runscn = elf_nextscn (ebl->elf, runscn)) != NULL)
{
GElf_Shdr runshdr_mem;
GElf_Shdr *runshdr = gelf_getshdr (runscn, &runshdr_mem);
if (runshdr != NULL)
{
if (runshdr->sh_type == SHT_GNU_versym
&& runshdr->sh_link == elf_ndxscn (scn))
/* Bingo, found the version information. Now get the data. */
versym_data = elf_getdata (runscn, NULL);
else if (runshdr->sh_type == SHT_GNU_verneed)
{
/* This is the information about the needed versions. */
verneed_data = elf_getdata (runscn, NULL);
verneed_stridx = runshdr->sh_link;
}
else if (runshdr->sh_type == SHT_GNU_verdef)
{
/* This is the information about the defined versions. */
verdef_data = elf_getdata (runscn, NULL);
verdef_stridx = runshdr->sh_link;
}
else if (runshdr->sh_type == SHT_SYMTAB_SHNDX
&& runshdr->sh_link == elf_ndxscn (scn))
/* Extended section index. */
xndx_data = elf_getdata (runscn, NULL);
}
}
/* Get the section header string table index. */
if (elf_getshstrndx (ebl->elf, &shstrndx) < 0)
error (EXIT_FAILURE, 0,
gettext ("cannot get section header string table index"));
/* Now we can compute the number of entries in the section. */
nsyms = data->d_size / (class == ELFCLASS32
? sizeof (Elf32_Sym) : sizeof (Elf64_Sym));
printf (ngettext ("\nSymbol table [%2u] '%s' contains %u entry:\n",
"\nSymbol table [%2u] '%s' contains %u entries:\n",
nsyms),
(unsigned int) elf_ndxscn (scn),
elf_strptr (ebl->elf, shstrndx, shdr->sh_name), nsyms);
printf (ngettext (" %lu local symbol String table: [%2u] '%s'\n",
" %lu local symbols String table: [%2u] '%s'\n",
shdr->sh_info),
(unsigned long int) shdr->sh_info,
(unsigned int) shdr->sh_link,
elf_strptr (ebl->elf, shstrndx,
gelf_getshdr (elf_getscn (ebl->elf, shdr->sh_link),
&glink)->sh_name));
fputs_unlocked (class == ELFCLASS32
? gettext ("\
Num: Value Size Type Bind Vis Ndx Name\n")
: gettext ("\
Num: Value Size Type Bind Vis Ndx Name\n"),
stdout);
for (cnt = 0; cnt < nsyms; ++cnt)
{
char typebuf[64];
char bindbuf[64];
char scnbuf[64];
Elf32_Word xndx;
GElf_Sym sym_mem;
GElf_Sym *sym = gelf_getsymshndx (data, xndx_data, cnt, &sym_mem, &xndx);
if (sym == NULL)
continue;
/* Determine the real section index. */
if (sym->st_shndx != SHN_XINDEX)
xndx = sym->st_shndx;
printf (gettext ("\
%5u: %0*" PRIx64 " %6" PRId64 " %-7s %-6s %-9s %6s %s"),
cnt,
class == ELFCLASS32 ? 8 : 16,
sym->st_value,
sym->st_size,
ebl_symbol_type_name (ebl, GELF_ST_TYPE (sym->st_info),
typebuf, sizeof (typebuf)),
ebl_symbol_binding_name (ebl, GELF_ST_BIND (sym->st_info),
bindbuf, sizeof (bindbuf)),
get_visibility_type (GELF_ST_VISIBILITY (sym->st_other)),
ebl_section_name (ebl, sym->st_shndx, xndx, scnbuf,
sizeof (scnbuf), NULL, shnum),
elf_strptr (ebl->elf, shdr->sh_link, sym->st_name));
if (versym_data != NULL)
{
/* Get the version information. */
GElf_Versym versym_mem;
GElf_Versym *versym;
versym = gelf_getversym (versym_data, cnt, &versym_mem);
if (versym != NULL && ((*versym & 0x8000) != 0 || *versym > 1))
{
bool is_nobits = false;
bool check_def = xndx != SHN_UNDEF;
if (xndx < SHN_LORESERVE || sym->st_shndx == SHN_XINDEX)
{
GElf_Shdr symshdr_mem;
GElf_Shdr *symshdr =
gelf_getshdr (elf_getscn (ebl->elf, xndx), &symshdr_mem);
is_nobits = (symshdr != NULL
&& symshdr->sh_type == SHT_NOBITS);
}
if (is_nobits || ! check_def)
{
/* We must test both. */
GElf_Verneed verneed_mem;
GElf_Verneed *verneed;
GElf_Vernaux vernaux_mem;
GElf_Vernaux *vernaux = NULL;
size_t vn_offset = 0;
verneed = gelf_getverneed (verneed_data, 0, &verneed_mem);
while (verneed != NULL)
{
size_t vna_offset = vn_offset;
vernaux = gelf_getvernaux (verneed_data,
vna_offset += verneed->vn_aux,
&vernaux_mem);
while (vernaux != NULL
&& vernaux->vna_other != *versym
&& vernaux->vna_next != 0)
{
/* Update the offset. */
vna_offset += vernaux->vna_next;
vernaux = (vernaux->vna_next == 0
? NULL
: gelf_getvernaux (verneed_data,
vna_offset,
&vernaux_mem));
}
/* Check whether we found the version. */
if (vernaux != NULL && vernaux->vna_other == *versym)
/* Found it. */
break;
vn_offset += verneed->vn_next;
verneed = (verneed->vn_next == 0
? NULL
: gelf_getverneed (verneed_data, vn_offset,
&verneed_mem));
}
if (vernaux != NULL && vernaux->vna_other == *versym)
{
printf ("@%s (%u)",
elf_strptr (ebl->elf, verneed_stridx,
vernaux->vna_name),
(unsigned int) vernaux->vna_other);
check_def = 0;
}
else if (! is_nobits)
error (0, 0, gettext ("bad dynamic symbol"));
else
check_def = 1;
}
if (check_def && *versym != 0x8001)
{
/* We must test both. */
GElf_Verdef verdef_mem;
GElf_Verdef *verdef;
size_t vd_offset = 0;
verdef = gelf_getverdef (verdef_data, 0, &verdef_mem);
while (verdef != NULL)
{
if (verdef->vd_ndx == (*versym & 0x7fff))
/* Found the definition. */
break;
vd_offset += verdef->vd_next;
verdef = (verdef->vd_next == 0
? NULL
: gelf_getverdef (verdef_data, vd_offset,
&verdef_mem));
}
if (verdef != NULL)
{
GElf_Verdaux verdaux_mem;
GElf_Verdaux *verdaux;
verdaux = gelf_getverdaux (verdef_data,
vd_offset + verdef->vd_aux,
&verdaux_mem);
if (verdaux != NULL)
printf ((*versym & 0x8000) ? "@%s" : "@@%s",
elf_strptr (ebl->elf, verdef_stridx,
verdaux->vda_name));
}
}
}
}
putchar ('\n');
}
}
/* Print version information. */
static void
print_verinfo (Ebl *ebl, GElf_Ehdr *ehdr)
{
/* Find the version information sections. For this we have to
search through the section table. */
Elf_Scn *scn = NULL;
while ((scn = elf_nextscn (ebl->elf, scn)) != NULL)
{
/* Handle the section if it is part of the versioning handling. */
GElf_Shdr shdr_mem;
GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
if (shdr != NULL)
{
if (shdr->sh_type == SHT_GNU_verneed)
handle_verneed (ebl, ehdr, scn, shdr);
else if (shdr->sh_type == SHT_GNU_verdef)
handle_verdef (ebl, ehdr, scn, shdr);
else if (shdr->sh_type == SHT_GNU_versym)
handle_versym (ebl, ehdr, scn, shdr);
}
}
}
static const char *
get_ver_flags (unsigned int flags)
{
static char buf[32];
char *endp;
if (flags == 0)
return gettext ("none");
if (flags & VER_FLG_BASE)
endp = stpcpy (buf, "BASE ");
else
endp = buf;
if (flags & VER_FLG_WEAK)
{
if (endp != buf)
endp = stpcpy (endp, "| ");
endp = stpcpy (endp, "WEAK ");
}
if (flags & ~(VER_FLG_BASE | VER_FLG_WEAK))
{
strncpy (endp, gettext ("| <unknown>"), buf + sizeof (buf) - endp);
buf[sizeof (buf) - 1] = '\0';
}
return buf;
}
static void
handle_verneed (Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn, GElf_Shdr *shdr)
{
Elf_Data *data;
int class = gelf_getclass (ebl->elf);
GElf_Shdr glink;
int cnt;
unsigned int offset;
size_t shstrndx;
/* Get the data of the section. */
data = elf_getdata (scn, NULL);
if (data == NULL)
return;
/* Get the section header string table index. */
if (elf_getshstrndx (ebl->elf, &shstrndx) < 0)
error (EXIT_FAILURE, 0,
gettext ("cannot get section header string table index"));
printf (ngettext ("\
\nVersion needs section [%2u] '%s' contains %d entry:\n Addr: %#0*" PRIx64 " Offset: %#08" PRIx64 " Link to section: [%2u] '%s'\n",
"\
\nVersion needs section [%2u] '%s' contains %d entries:\n Addr: %#0*" PRIx64 " Offset: %#08" PRIx64 " Link to section: [%2u] '%s'\n",
shdr->sh_info),
(unsigned int) elf_ndxscn (scn),
elf_strptr (ebl->elf, shstrndx, shdr->sh_name), shdr->sh_info,
class == ELFCLASS32 ? 10 : 18, shdr->sh_addr,
shdr->sh_offset,
(unsigned int) shdr->sh_link,
elf_strptr (ebl->elf, shstrndx,
gelf_getshdr (elf_getscn (ebl->elf, shdr->sh_link),
&glink)->sh_name));
offset = 0;
for (cnt = shdr->sh_info; --cnt >= 0; )
{
GElf_Verneed needmem;
GElf_Verneed *need;
unsigned int auxoffset;
int cnt2;
/* Get the data at the next offset. */
need = gelf_getverneed (data, offset, &needmem);
if (need == NULL)
break;
printf (gettext (" %#06x: Version: %hu File: %s Cnt: %hu\n"),
offset, (unsigned short int) need->vn_version,
elf_strptr (ebl->elf, shdr->sh_link, need->vn_file),
(unsigned short int) need->vn_cnt);
auxoffset = offset + need->vn_aux;
for (cnt2 = need->vn_cnt; --cnt2 >= 0; )
{
GElf_Vernaux auxmem;
GElf_Vernaux *aux;
aux = gelf_getvernaux (data, auxoffset, &auxmem);
if (aux == NULL)
break;
printf (gettext (" %#06x: Name: %s Flags: %s Version: %hu\n"),
auxoffset,
elf_strptr (ebl->elf, shdr->sh_link, aux->vna_name),
get_ver_flags (aux->vna_flags),
(unsigned short int) aux->vna_other);
auxoffset += aux->vna_next;
}
/* Find the next offset. */
offset += need->vn_next;
}
}
static void
handle_verdef (Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn, GElf_Shdr *shdr)
{
Elf_Data *data;
int class = gelf_getclass (ebl->elf);
GElf_Shdr glink;
int cnt;
unsigned int offset;
size_t shstrndx;
/* Get the data of the section. */
data = elf_getdata (scn, NULL);
if (data == NULL)
return;
/* Get the section header string table index. */
if (elf_getshstrndx (ebl->elf, &shstrndx) < 0)
error (EXIT_FAILURE, 0,
gettext ("cannot get section header string table index"));
printf (ngettext ("\
\nVersion definition section [%2u] '%s' contains %d entry:\n Addr: %#0*" PRIx64 " Offset: %#08" PRIx64 " Link to section: [%2u] '%s'\n",
"\
\nVersion definition section [%2u] '%s' contains %d entries:\n Addr: %#0*" PRIx64 " Offset: %#08" PRIx64 " Link to section: [%2u] '%s'\n",
shdr->sh_info),
(unsigned int) elf_ndxscn (scn),
elf_strptr (ebl->elf, shstrndx, shdr->sh_name),
shdr->sh_info,
class == ELFCLASS32 ? 10 : 18, shdr->sh_addr,
shdr->sh_offset,
(unsigned int) shdr->sh_link,
elf_strptr (ebl->elf, shstrndx,
gelf_getshdr (elf_getscn (ebl->elf, shdr->sh_link),
&glink)->sh_name));
offset = 0;
for (cnt = shdr->sh_info; --cnt >= 0; )
{
GElf_Verdef defmem;
GElf_Verdef *def;
GElf_Verdaux auxmem;
GElf_Verdaux *aux;
unsigned int auxoffset;
int cnt2;
/* Get the data at the next offset. */
def = gelf_getverdef (data, offset, &defmem);
if (def == NULL)
break;
auxoffset = offset + def->vd_aux;
aux = gelf_getverdaux (data, auxoffset, &auxmem);
if (aux == NULL)
break;
printf (gettext ("\
%#06x: Version: %hd Flags: %s Index: %hd Cnt: %hd Name: %s\n"),
offset, def->vd_version,
get_ver_flags (def->vd_flags),
def->vd_ndx,
def->vd_cnt,
elf_strptr (ebl->elf, shdr->sh_link, aux->vda_name));
auxoffset += aux->vda_next;
for (cnt2 = 1; cnt2 < def->vd_cnt; ++cnt2)
{
aux = gelf_getverdaux (data, auxoffset, &auxmem);
if (aux == NULL)
break;
printf (gettext (" %#06x: Parent %d: %s\n"),
auxoffset, cnt2,
elf_strptr (ebl->elf, shdr->sh_link, aux->vda_name));
auxoffset += aux->vda_next;
}
/* Find the next offset. */
offset += def->vd_next;
}
}
static void
handle_versym (Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn, GElf_Shdr *shdr)
{
Elf_Data *data;
int class = gelf_getclass (ebl->elf);
Elf_Scn *verscn;
GElf_Shdr glink;
Elf_Scn *defscn;
Elf_Scn *needscn;
const char **vername;
const char **filename;
size_t nvername;
unsigned int cnt;
size_t shstrndx;
/* Get the data of the section. */
data = elf_getdata (scn, NULL);
if (data == NULL)
return;
/* Get the section header string table index. */
if (elf_getshstrndx (ebl->elf, &shstrndx) < 0)
error (EXIT_FAILURE, 0,
gettext ("cannot get section header string table index"));
/* We have to find the version definition section and extract the
version names. */
defscn = NULL;
needscn = NULL;
verscn = NULL;
while ((verscn = elf_nextscn (ebl->elf, verscn)) != NULL)
{
GElf_Shdr vershdr_mem;
GElf_Shdr *vershdr = gelf_getshdr (verscn, &vershdr_mem);
if (vershdr != NULL)
{
if (vershdr->sh_type == SHT_GNU_verdef)
defscn = verscn;
else if (vershdr->sh_type == SHT_GNU_verneed)
needscn = verscn;
}
}
if (defscn != NULL || needscn != NULL)
{
/* We have a version information (better should have). Now get
the version names. First find the maximum version number. */
nvername = 0;
if (defscn != NULL)
{
/* Run through the version definitions and find the highest
index. */
unsigned int offset = 0;
Elf_Data *defdata;
GElf_Shdr defshdrmem;
GElf_Shdr *defshdr;
defdata = elf_getdata (defscn, NULL);
if (defdata == NULL)
return;
defshdr = gelf_getshdr (defscn, &defshdrmem);
if (defshdr == NULL)
return;
for (cnt = 0; cnt < defshdr->sh_info; ++cnt)
{
GElf_Verdef defmem;
GElf_Verdef *def;
/* Get the data at the next offset. */
def = gelf_getverdef (defdata, offset, &defmem);
if (def == NULL)
break;
nvername = MAX (nvername, (size_t) (def->vd_ndx & 0x7fff));
offset += def->vd_next;
}
}
if (needscn != NULL)
{
unsigned int offset = 0;
Elf_Data *needdata;
GElf_Shdr needshdrmem;
GElf_Shdr *needshdr;
needdata = elf_getdata (needscn, NULL);
if (needdata == NULL)
return;
needshdr = gelf_getshdr (needscn, &needshdrmem);
if (needshdr == NULL)
return;
for (cnt = 0; cnt < needshdr->sh_info; ++cnt)
{
GElf_Verneed needmem;
GElf_Verneed *need;
unsigned int auxoffset;
int cnt2;
/* Get the data at the next offset. */
need = gelf_getverneed (needdata, offset, &needmem);
if (need == NULL)
break;
/* Run through the auxiliary entries. */
auxoffset = offset + need->vn_aux;
for (cnt2 = need->vn_cnt; --cnt2 >= 0; )
{
GElf_Vernaux auxmem;
GElf_Vernaux *aux;
aux = gelf_getvernaux (needdata, auxoffset, &auxmem);
if (aux == NULL)
break;
nvername = MAX (nvername,
(size_t) (aux->vna_other & 0x7fff));
auxoffset += aux->vna_next;
}
offset += need->vn_next;
}
}
/* This is the number of versions we know about. */
++nvername;
/* Allocate the array. */
vername = (const char **) alloca (nvername * sizeof (const char *));
filename = (const char **) alloca (nvername * sizeof (const char *));
/* Run through the data structures again and collect the strings. */
if (defscn != NULL)
{
/* Run through the version definitions and find the highest
index. */
unsigned int offset = 0;
Elf_Data *defdata;
GElf_Shdr defshdrmem;
GElf_Shdr *defshdr;
defdata = elf_getdata (defscn, NULL);
if (defdata == NULL)
return;
defshdr = gelf_getshdr (defscn, &defshdrmem);
if (defshdr == NULL)
return;
for (cnt = 0; cnt < defshdr->sh_info; ++cnt)
{
GElf_Verdef defmem;
GElf_Verdef *def;
GElf_Verdaux auxmem;
GElf_Verdaux *aux;
/* Get the data at the next offset. */
def = gelf_getverdef (defdata, offset, &defmem);
if (def == NULL)
break;
aux = gelf_getverdaux (defdata, offset + def->vd_aux, &auxmem);
if (aux == NULL)
break;
vername[def->vd_ndx & 0x7fff]
= elf_strptr (ebl->elf, defshdr->sh_link, aux->vda_name);
filename[def->vd_ndx & 0x7fff] = NULL;
offset += def->vd_next;
}
}
if (needscn != NULL)
{
unsigned int offset = 0;
Elf_Data *needdata;
GElf_Shdr needshdrmem;
GElf_Shdr *needshdr;
needdata = elf_getdata (needscn, NULL);
if (needdata == NULL)
return;
needshdr = gelf_getshdr (needscn, &needshdrmem);
if (needshdr == NULL)
return;
for (cnt = 0; cnt < needshdr->sh_info; ++cnt)
{
GElf_Verneed needmem;
GElf_Verneed *need;
unsigned int auxoffset;
int cnt2;
/* Get the data at the next offset. */
need = gelf_getverneed (needdata, offset, &needmem);
if (need == NULL)
break;
/* Run through the auxiliary entries. */
auxoffset = offset + need->vn_aux;
for (cnt2 = need->vn_cnt; --cnt2 >= 0; )
{
GElf_Vernaux auxmem;
GElf_Vernaux *aux;
aux = gelf_getvernaux (needdata, auxoffset, &auxmem);
if (aux == NULL)
break;
vername[aux->vna_other & 0x7fff]
= elf_strptr (ebl->elf, needshdr->sh_link, aux->vna_name);
filename[aux->vna_other & 0x7fff]
= elf_strptr (ebl->elf, needshdr->sh_link, need->vn_file);
auxoffset += aux->vna_next;
}
offset += need->vn_next;
}
}
}
else
{
vername = NULL;
nvername = 1;
filename = NULL;
}
/* Print the header. */
printf (ngettext ("\
\nVersion symbols section [%2u] '%s' contains %d entry:\n Addr: %#0*" PRIx64 " Offset: %#08" PRIx64 " Link to section: [%2u] '%s'",
"\
\nVersion symbols section [%2u] '%s' contains %d entries:\n Addr: %#0*" PRIx64 " Offset: %#08" PRIx64 " Link to section: [%2u] '%s'",
shdr->sh_size / shdr->sh_entsize),
(unsigned int) elf_ndxscn (scn),
elf_strptr (ebl->elf, shstrndx, shdr->sh_name),
(int) (shdr->sh_size / shdr->sh_entsize),
class == ELFCLASS32 ? 10 : 18, shdr->sh_addr,
shdr->sh_offset,
(unsigned int) shdr->sh_link,
elf_strptr (ebl->elf, shstrndx,
gelf_getshdr (elf_getscn (ebl->elf, shdr->sh_link),
&glink)->sh_name));
/* Now we can finally look at the actual contents of this section. */
for (cnt = 0; cnt < shdr->sh_size / shdr->sh_entsize; ++cnt)
{
GElf_Versym symmem;
GElf_Versym *sym;
ssize_t n;
if (cnt % 2 == 0)
printf ("\n %4d:", cnt);
sym = gelf_getversym (data, cnt, &symmem);
if (sym == NULL)
break;
switch (*sym)
{
case 0:
fputs_unlocked (gettext (" 0 *local* "),
stdout);
break;
case 1:
fputs_unlocked (gettext (" 1 *global* "),
stdout);
break;
default:
n = printf ("%4d%c%s",
*sym & 0x7fff, *sym & 0x8000 ? 'h' : ' ',
(unsigned int) (*sym & 0x7fff) < nvername
? vername[*sym & 0x7fff] : "???");
if ((unsigned int) (*sym & 0x7fff) < nvername
&& filename[*sym & 0x7fff] != NULL)
n += printf ("(%s)", filename[*sym & 0x7fff]);
printf ("%*s", MAX (0, 33 - (int) n), " ");
break;
}
}
putchar ('\n');
}
static void
handle_hash (Ebl *ebl, GElf_Ehdr *ehdr)
{
/* Find the symbol table(s). For this we have to search through the
section table. */
Elf_Scn *scn = NULL;
size_t shstrndx;
/* Get the section header string table index. */
if (elf_getshstrndx (ebl->elf, &shstrndx) < 0)
error (EXIT_FAILURE, 0,
gettext ("cannot get section header string table index"));
while ((scn = elf_nextscn (ebl->elf, scn)) != NULL)
{
/* Handle the section if it is a symbol table. */
GElf_Shdr shdr_mem;
GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
if (shdr != NULL && shdr->sh_type == SHT_HASH)
{
Elf_Data *data = elf_getdata (scn, NULL);
Elf32_Word nbucket;
Elf32_Word nchain;
Elf32_Word *bucket;
Elf32_Word *chain;
uint32_t *lengths;
uint32_t *counts;
Elf32_Word cnt;
Elf32_Word maxlength = 0;
Elf32_Word nsyms = 0;
uint64_t nzero_counts = 0;
GElf_Shdr glink;
if (data == NULL)
{
error (0, 0, gettext ("cannot get data for section %d: %s"),
(int) elf_ndxscn (scn), elf_errmsg (-1));
continue;
}
nbucket = ((Elf32_Word *) data->d_buf)[0];
nchain = ((Elf32_Word *) data->d_buf)[1];
bucket = &((Elf32_Word *) data->d_buf)[2];
chain = &((Elf32_Word *) data->d_buf)[2 + nbucket];
printf (ngettext ("\
\nHistogram for bucket list length in section [%2u] '%s' (total of %d bucket):\n Addr: %#0*" PRIx64 " Offset: %#08" PRIx64 " Link to section: [%2u] '%s'\n",
"\
\nHistogram for bucket list length in section [%2u] '%s' (total of %d buckets):\n Addr: %#0*" PRIx64 " Offset: %#08" PRIx64 " Link to section: [%2u] '%s'\n",
nbucket),
(unsigned int) elf_ndxscn (scn),
elf_strptr (ebl->elf, shstrndx, shdr->sh_name),
(int) nbucket,
gelf_getclass (ebl->elf) == ELFCLASS32 ? 10 : 18,
shdr->sh_addr,
shdr->sh_offset,
(unsigned int) shdr->sh_link,
elf_strptr (ebl->elf, shstrndx,
gelf_getshdr (elf_getscn (ebl->elf,
shdr->sh_link),
&glink)->sh_name));
lengths = (uint32_t *) xcalloc (nbucket, sizeof (uint32_t));
for (cnt = 0; cnt < nbucket; ++cnt)
if (bucket[cnt] != 0)
{
Elf32_Word inner;
inner = bucket[cnt];
while (inner > 0 && inner < nchain)
{
++nsyms;
if (maxlength < ++lengths[cnt])
++maxlength;
inner = chain[inner];
}
}
counts = (uint32_t *) xcalloc (maxlength + 1, sizeof (uint32_t));
for (cnt = 0; cnt < nbucket; ++cnt)
++counts[lengths[cnt]];
if (nbucket > 0)
{
uint64_t success = 0;
Elf32_Word acc;
puts (gettext (" Length Number % of total Coverage"));
printf (gettext (" 0 %6" PRIu32 " %5.1f%%\n"),
counts[0], (counts[0] * 100.0) / nbucket);
for (cnt = 1; cnt <= maxlength; ++cnt)
{
nzero_counts += counts[cnt] * cnt;
printf (gettext ("\
%7d %6" PRIu32 " %5.1f%% %5.1f%%\n"),
(int) cnt,
counts[cnt], (counts[cnt] * 100.0) / nbucket,
(nzero_counts * 100.0) / nsyms);
}
acc = 0;
for (cnt = 1; cnt <= maxlength; ++cnt)
{
acc += cnt;
success += counts[cnt] * acc;
}
printf (gettext ("\
Average number of tests: successful lookup: %f\n\
unsuccessful lookup: %f\n"),
(double) success / (double) nzero_counts,
(double) nzero_counts / (double) nbucket);
}
free (counts);
free (lengths);
}
}
}
static void
print_liblist (Ebl *ebl, GElf_Ehdr *ehdr)
{
/* Find the library list sections. For this we have to search
through the section table. */
Elf_Scn *scn = NULL;
/* Get the section header string table index. */
size_t shstrndx;
if (elf_getshstrndx (ebl->elf, &shstrndx) < 0)
error (EXIT_FAILURE, 0,
gettext ("cannot get section header string table index"));
while ((scn = elf_nextscn (ebl->elf, scn)) != NULL)
{
GElf_Shdr shdr_mem;
GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
if (shdr != NULL && shdr->sh_type == SHT_GNU_LIBLIST)
{
int nentries = shdr->sh_size / shdr->sh_entsize;
printf (ngettext ("\
\nLibrary list section [%2zu] '%s' at offset %#0" PRIx64 " contains %d entry:\n",
"\
\nLibrary list section [%2zu] '%s' at offset %#0" PRIx64 " contains %d entries:\n",
nentries),
elf_ndxscn (scn),
elf_strptr (ebl->elf, shstrndx, shdr->sh_name),
shdr->sh_offset,
nentries);
Elf_Data *data = elf_getdata (scn, NULL);
if (data == NULL)
return;
puts (gettext ("\
Library Time Stamp Checksum Version Flags"));
for (int cnt = 0; cnt < nentries; ++cnt)
{
GElf_Lib lib_mem;
GElf_Lib *lib = gelf_getlib (data, cnt, &lib_mem);
if (lib == NULL)
continue;
time_t t = (time_t) lib->l_time_stamp;
struct tm *tm = gmtime (&t);
if (tm == NULL)
continue;
printf (" [%2d] %-29s %04u-%02u-%02uT%02u:%02u:%02u %08x %-7u %u\n",
cnt, elf_strptr (ebl->elf, shdr->sh_link, lib->l_name),
tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec,
(unsigned int) lib->l_checksum,
(unsigned int) lib->l_version,
(unsigned int) lib->l_flags);
}
}
}
}
static const char *
dwarf_tag_string (unsigned int tag)
{
static const char *known_tags[] =
{
[DW_TAG_array_type] = "array_type",
[DW_TAG_class_type] = "class_type",
[DW_TAG_entry_point] = "entry_point",
[DW_TAG_enumeration_type] = "enumeration_type",
[DW_TAG_formal_parameter] = "formal_parameter",
[DW_TAG_imported_declaration] = "imported_declaration",
[DW_TAG_label] = "label",
[DW_TAG_lexical_block] = "lexical_block",
[DW_TAG_member] = "member",
[DW_TAG_pointer_type] = "pointer_type",
[DW_TAG_reference_type] = "reference_type",
[DW_TAG_compile_unit] = "compile_unit",
[DW_TAG_string_type] = "string_type",
[DW_TAG_structure_type] = "structure_type",
[DW_TAG_subroutine_type] = "subroutine_type",
[DW_TAG_typedef] = "typedef",
[DW_TAG_union_type] = "union_type",
[DW_TAG_unspecified_parameters] = "unspecified_parameters",
[DW_TAG_variant] = "variant",
[DW_TAG_common_block] = "common_block",
[DW_TAG_common_inclusion] = "common_inclusion",
[DW_TAG_inheritance] = "inheritance",
[DW_TAG_inlined_subroutine] = "inlined_subroutine",
[DW_TAG_module] = "module",
[DW_TAG_ptr_to_member_type] = "ptr_to_member_type",
[DW_TAG_set_type] = "set_type",
[DW_TAG_subrange_type] = "subrange_type",
[DW_TAG_with_stmt] = "with_stmt",
[DW_TAG_access_declaration] = "access_declaration",
[DW_TAG_base_type] = "base_type",
[DW_TAG_catch_block] = "catch_block",
[DW_TAG_const_type] = "const_type",
[DW_TAG_constant] = "constant",
[DW_TAG_enumerator] = "enumerator",
[DW_TAG_file_type] = "file_type",
[DW_TAG_friend] = "friend",
[DW_TAG_namelist] = "namelist",
[DW_TAG_namelist_item] = "namelist_item",
[DW_TAG_packed_type] = "packed_type",
[DW_TAG_subprogram] = "subprogram",
[DW_TAG_template_type_param] = "template_type_param",
[DW_TAG_template_value_param] = "template_value_param",
[DW_TAG_thrown_type] = "thrown_type",
[DW_TAG_try_block] = "try_block",
[DW_TAG_variant_part] = "variant_part",
[DW_TAG_variable] = "variable",
[DW_TAG_volatile_type] = "volatile_type",
};
const unsigned int nknown_tags = (sizeof (known_tags)
/ sizeof (known_tags[0]));
static char buf[40];
const char *result = NULL;
if (tag < nknown_tags)
result = known_tags[tag];
if (result == NULL)
/* There are a few known extensions. */
switch (tag)
{
case DW_TAG_MIPS_loop:
result = "MIPS_loop";
break;
case DW_TAG_format_label:
result = "format_label";
break;
case DW_TAG_function_template:
result = "function_template";
break;
case DW_TAG_class_template:
result = "class_template";
break;
default:
if (tag < DW_TAG_lo_user)
snprintf (buf, sizeof buf, gettext ("unknown tag %hx"), tag);
else
snprintf (buf, sizeof buf, gettext ("unknown user tag %hx"), tag);
result = buf;
break;
}
return result;
}
static const char *
dwarf_attr_string (unsigned int attrnum)
{
static const char *known_attrs[] =
{
[DW_AT_sibling] = "sibling",
[DW_AT_location] = "location",
[DW_AT_name] = "name",
[DW_AT_ordering] = "ordering",
[DW_AT_subscr_data] = "subscr_data",
[DW_AT_byte_size] = "byte_size",
[DW_AT_bit_offset] = "bit_offset",
[DW_AT_bit_size] = "bit_size",
[DW_AT_element_list] = "element_list",
[DW_AT_stmt_list] = "stmt_list",
[DW_AT_low_pc] = "low_pc",
[DW_AT_high_pc] = "high_pc",
[DW_AT_language] = "language",
[DW_AT_member] = "member",
[DW_AT_discr] = "discr",
[DW_AT_discr_value] = "discr_value",
[DW_AT_visibility] = "visibility",
[DW_AT_import] = "import",
[DW_AT_string_length] = "string_length",
[DW_AT_common_reference] = "common_reference",
[DW_AT_comp_dir] = "comp_dir",
[DW_AT_const_value] = "const_value",
[DW_AT_containing_type] = "containing_type",
[DW_AT_default_value] = "default_value",
[DW_AT_inline] = "inline",
[DW_AT_is_optional] = "is_optional",
[DW_AT_lower_bound] = "lower_bound",
[DW_AT_producer] = "producer",
[DW_AT_prototyped] = "prototyped",
[DW_AT_return_addr] = "return_addr",
[DW_AT_start_scope] = "start_scope",
[DW_AT_stride_size] = "stride_size",
[DW_AT_upper_bound] = "upper_bound",
[DW_AT_abstract_origin] = "abstract_origin",
[DW_AT_accessibility] = "accessibility",
[DW_AT_address_class] = "address_class",
[DW_AT_artificial] = "artificial",
[DW_AT_base_types] = "base_types",
[DW_AT_calling_convention] = "calling_convention",
[DW_AT_count] = "count",
[DW_AT_data_member_location] = "data_member_location",
[DW_AT_decl_column] = "decl_column",
[DW_AT_decl_file] = "decl_file",
[DW_AT_decl_line] = "decl_line",
[DW_AT_declaration] = "declaration",
[DW_AT_discr_list] = "discr_list",
[DW_AT_encoding] = "encoding",
[DW_AT_external] = "external",
[DW_AT_frame_base] = "frame_base",
[DW_AT_friend] = "friend",
[DW_AT_identifier_case] = "identifier_case",
[DW_AT_macro_info] = "macro_info",
[DW_AT_namelist_items] = "namelist_items",
[DW_AT_priority] = "priority",
[DW_AT_segment] = "segment",
[DW_AT_specification] = "specification",
[DW_AT_static_link] = "static_link",
[DW_AT_type] = "type",
[DW_AT_use_location] = "use_location",
[DW_AT_variable_parameter] = "variable_parameter",
[DW_AT_virtuality] = "virtuality",
[DW_AT_vtable_elem_location] = "vtable_elem_location"
};
const unsigned int nknown_attrs = (sizeof (known_attrs)
/ sizeof (known_attrs[0]));
static char buf[40];
const char *result = NULL;
if (attrnum < nknown_attrs)
result = known_attrs[attrnum];
if (result == NULL)
/* There are a few known extensions. */
switch (attrnum)
{
case DW_AT_MIPS_fde:
result = "MIPS_fde";
break;
case DW_AT_MIPS_loop_begin:
result = "MIPS_loop_begin";
break;
case DW_AT_MIPS_tail_loop_begin:
result = "MIPS_tail_loop_begin";
break;
case DW_AT_MIPS_epilog_begin:
result = "MIPS_epilog_begin";
break;
case DW_AT_MIPS_loop_unroll_factor:
result = "MIPS_loop_unroll_factor";
break;
case DW_AT_MIPS_software_pipeline_depth:
result = "MIPS_software_pipeline_depth";
break;
case DW_AT_MIPS_linkage_name:
result = "MIPS_linkage_name";
break;
case DW_AT_MIPS_stride:
result = "MIPS_stride";
break;
case DW_AT_MIPS_abstract_name:
result = "MIPS_abstract_name";
break;
case DW_AT_MIPS_clone_origin:
result = "MIPS_clone_origin";
break;
case DW_AT_MIPS_has_inlines:
result = "MIPS_has_inlines";
break;
case DW_AT_MIPS_stride_byte:
result = "MIPS_stride_byte";
break;
case DW_AT_MIPS_stride_elem:
result = "MIPS_stride_elem";
break;
case DW_AT_MIPS_ptr_dopetype:
result = "MIPS_ptr_dopetype";
break;
case DW_AT_MIPS_allocatable_dopetype:
result = "MIPS_allocatable_dopetype";
break;
case DW_AT_MIPS_assumed_shape_dopetype:
result = "MIPS_assumed_shape_dopetype";
break;
case DW_AT_MIPS_assumed_size:
result = "MIPS_assumed_size";
break;
case DW_AT_sf_names:
result = "sf_names";
break;
case DW_AT_src_info:
result = "src_info";
break;
case DW_AT_mac_info:
result = "mac_info";
break;
case DW_AT_src_coords:
result = "src_coords";
break;
case DW_AT_body_begin:
result = "body_begin";
break;
case DW_AT_body_end:
result = "body_end";
break;
default:
if (attrnum < DW_AT_lo_user)
snprintf (buf, sizeof buf, gettext ("unknown attribute %hx"),
attrnum);
else
snprintf (buf, sizeof buf, gettext ("unknown user attribute %hx"),
attrnum);
result = buf;
break;
}
return result;
}
static const char *
dwarf_form_string (unsigned int form)
{
static const char *known_forms[] =
{
[DW_FORM_addr] = "addr",
[DW_FORM_block2] = "block2",
[DW_FORM_block4] = "block4",
[DW_FORM_data2] = "data2",
[DW_FORM_data4] = "data4",
[DW_FORM_data8] = "data8",
[DW_FORM_string] = "string",
[DW_FORM_block] = "block",
[DW_FORM_block1] = "block1",
[DW_FORM_data1] = "data1",
[DW_FORM_flag] = "flag",
[DW_FORM_sdata] = "sdata",
[DW_FORM_strp] = "strp",
[DW_FORM_udata] = "udata",
[DW_FORM_ref_addr] = "ref_addr",
[DW_FORM_ref1] = "ref1",
[DW_FORM_ref2] = "ref2",
[DW_FORM_ref4] = "ref4",
[DW_FORM_ref8] = "ref8",
[DW_FORM_ref_udata] = "ref_udata",
[DW_FORM_indirect] = "indirect"
};
const unsigned int nknown_forms = (sizeof (known_forms)
/ sizeof (known_forms[0]));
static char buf[40];
const char *result = NULL;
if (form < nknown_forms)
result = known_forms[form];
if (result == NULL)
snprintf (buf, sizeof buf, gettext ("unknown form %" PRIx64),
(uint64_t) form);
return result;
}
static const char *
dwarf_lang_string (unsigned int lang)
{
static const char *known[] =
{
[DW_LANG_C89] = "ISO C89",
[DW_LANG_C] = "C",
[DW_LANG_Ada83] = "Ada83",
[DW_LANG_C_plus_plus ] = "C++",
[DW_LANG_Cobol74] = "Cobol74",
[DW_LANG_Cobol85] = "Cobol85",
[DW_LANG_Fortran77] = "Fortran77",
[DW_LANG_Fortran90] = "Fortran90",
[DW_LANG_Pascal83] = "Pascal83",
[DW_LANG_Modula2] = "Modula2",
[DW_LANG_Java] = "Java",
[DW_LANG_C99] = "ISO C99",
[DW_LANG_Ada95] = "Ada95",
[DW_LANG_Fortran95] = "Fortran95",
[DW_LANG_PL1] = "PL1"
};
if (lang < sizeof (known) / sizeof (known[0]))
return known[lang];
else if (lang == DW_LANG_Mips_Assembler)
/* This language tag is used for assembler in general. */
return "Assembler";
if (lang >= DW_LANG_lo_user && lang <= DW_LANG_hi_user)
{
static char buf[100];
snprintf (buf, sizeof (buf), "lo_user+%u", lang - DW_LANG_lo_user);
return buf;
}
return "???";
}
static void
print_ops (Dwarf *dbg, int level, unsigned int addrsize, Dwarf_Word len,
unsigned char *data)
{
static const char *known[] =
{
[DW_OP_addr] = "addr",
[DW_OP_deref] = "deref",
[DW_OP_const1u] = "const1u",
[DW_OP_const1s] = "const1s",
[DW_OP_const2u] = "const2u",
[DW_OP_const2s] = "const2s",
[DW_OP_const4u] = "const4u",
[DW_OP_const4s] = "const4s",
[DW_OP_const8u] = "const8u",
[DW_OP_const8s] = "const8s",
[DW_OP_constu] = "constu",
[DW_OP_consts] = "consts",
[DW_OP_dup] = "dup",
[DW_OP_drop] = "drop",
[DW_OP_over] = "over",
[DW_OP_pick] = "pick",
[DW_OP_swap] = "swap",
[DW_OP_rot] = "rot",
[DW_OP_xderef] = "xderef",
[DW_OP_abs] = "abs",
[DW_OP_and] = "and",
[DW_OP_div] = "div",
[DW_OP_minus] = "minus",
[DW_OP_mod] = "mod",
[DW_OP_mul] = "mul",
[DW_OP_neg] = "neg",
[DW_OP_not] = "not",
[DW_OP_or] = "or",
[DW_OP_plus] = "plus",
[DW_OP_plus_uconst] = "plus_uconst",
[DW_OP_shl] = "shl",
[DW_OP_shr] = "shr",
[DW_OP_shra] = "shra",
[DW_OP_xor] = "xor",
[DW_OP_bra] = "bra",
[DW_OP_eq] = "eq",
[DW_OP_ge] = "ge",
[DW_OP_gt] = "gt",
[DW_OP_le] = "le",
[DW_OP_lt] = "lt",
[DW_OP_ne] = "ne",
[DW_OP_skip] = "skip",
[DW_OP_lit0] = "lit0",
[DW_OP_lit1] = "lit1",
[DW_OP_lit2] = "lit2",
[DW_OP_lit3] = "lit3",
[DW_OP_lit4] = "lit4",
[DW_OP_lit5] = "lit5",
[DW_OP_lit6] = "lit6",
[DW_OP_lit7] = "lit7",
[DW_OP_lit8] = "lit8",
[DW_OP_lit9] = "lit9",
[DW_OP_lit10] = "lit10",
[DW_OP_lit11] = "lit11",
[DW_OP_lit12] = "lit12",
[DW_OP_lit13] = "lit13",
[DW_OP_lit14] = "lit14",
[DW_OP_lit15] = "lit15",
[DW_OP_lit16] = "lit16",
[DW_OP_lit17] = "lit17",
[DW_OP_lit18] = "lit18",
[DW_OP_lit19] = "lit19",
[DW_OP_lit20] = "lit20",
[DW_OP_lit21] = "lit21",
[DW_OP_lit22] = "lit22",
[DW_OP_lit23] = "lit23",
[DW_OP_lit24] = "lit24",
[DW_OP_lit25] = "lit25",
[DW_OP_lit26] = "lit26",
[DW_OP_lit27] = "lit27",
[DW_OP_lit28] = "lit28",
[DW_OP_lit29] = "lit29",
[DW_OP_lit30] = "lit30",
[DW_OP_lit31] = "lit31",
[DW_OP_reg0] = "reg0",
[DW_OP_reg1] = "reg1",
[DW_OP_reg2] = "reg2",
[DW_OP_reg3] = "reg3",
[DW_OP_reg4] = "reg4",
[DW_OP_reg5] = "reg5",
[DW_OP_reg6] = "reg6",
[DW_OP_reg7] = "reg7",
[DW_OP_reg8] = "reg8",
[DW_OP_reg9] = "reg9",
[DW_OP_reg10] = "reg10",
[DW_OP_reg11] = "reg11",
[DW_OP_reg12] = "reg12",
[DW_OP_reg13] = "reg13",
[DW_OP_reg14] = "reg14",
[DW_OP_reg15] = "reg15",
[DW_OP_reg16] = "reg16",
[DW_OP_reg17] = "reg17",
[DW_OP_reg18] = "reg18",
[DW_OP_reg19] = "reg19",
[DW_OP_reg20] = "reg20",
[DW_OP_reg21] = "reg21",
[DW_OP_reg22] = "reg22",
[DW_OP_reg23] = "reg23",
[DW_OP_reg24] = "reg24",
[DW_OP_reg25] = "reg25",
[DW_OP_reg26] = "reg26",
[DW_OP_reg27] = "reg27",
[DW_OP_reg28] = "reg28",
[DW_OP_reg29] = "reg29",
[DW_OP_reg30] = "reg30",
[DW_OP_reg31] = "reg31",
[DW_OP_breg0] = "breg0",
[DW_OP_breg1] = "breg1",
[DW_OP_breg2] = "breg2",
[DW_OP_breg3] = "breg3",
[DW_OP_breg4] = "breg4",
[DW_OP_breg5] = "breg5",
[DW_OP_breg6] = "breg6",
[DW_OP_breg7] = "breg7",
[DW_OP_breg8] = "breg8",
[DW_OP_breg9] = "breg9",
[DW_OP_breg10] = "breg10",
[DW_OP_breg11] = "breg11",
[DW_OP_breg12] = "breg12",
[DW_OP_breg13] = "breg13",
[DW_OP_breg14] = "breg14",
[DW_OP_breg15] = "breg15",
[DW_OP_breg16] = "breg16",
[DW_OP_breg17] = "breg17",
[DW_OP_breg18] = "breg18",
[DW_OP_breg19] = "breg19",
[DW_OP_breg20] = "breg20",
[DW_OP_breg21] = "breg21",
[DW_OP_breg22] = "breg22",
[DW_OP_breg23] = "breg23",
[DW_OP_breg24] = "breg24",
[DW_OP_breg25] = "breg25",
[DW_OP_breg26] = "breg26",
[DW_OP_breg27] = "breg27",
[DW_OP_breg28] = "breg28",
[DW_OP_breg29] = "breg29",
[DW_OP_breg30] = "breg30",
[DW_OP_breg31] = "breg31",
[DW_OP_regx] = "regx",
[DW_OP_fbreg] = "fbreg",
[DW_OP_bregx] = "bregx",
[DW_OP_piece] = "piece",
[DW_OP_deref_size] = "deref_size",
[DW_OP_xderef_size] = "xderef_size",
[DW_OP_nop] = "nop",
[DW_OP_push_object_address] = "push_object_address",
[DW_OP_call2] = "call2",
[DW_OP_call4] = "call4",
[DW_OP_call_ref] = "call_ref",
};
Dwarf_Word offset = 0;
while (len-- > 0)
{
size_t op = *((unsigned char *) data);
++data;
switch (op)
{
case DW_OP_call_ref:
case DW_OP_addr:;
/* Address operand. */
Dwarf_Word addr;
if (addrsize == 4)
addr = read_4ubyte_unaligned (dbg, data);
else
{
assert (addrsize == 8);
addr = read_8ubyte_unaligned (dbg, data);
}
data += addrsize;
len -= addrsize;
printf (" %*s [%4" PRIuMAX "] %s %" PRIuMAX "\n",
(int) (20 + level * 2), "", (uintmax_t) offset,
known[op] ?: "???", (uintmax_t) addr);
offset += 1 + addrsize;
break;
case DW_OP_deref_size: /* XXX Correct? */
case DW_OP_xderef_size: /* XXX Correct? */
case DW_OP_pick:
case DW_OP_const1u:
printf (" %*s [%4" PRIuMAX "] %s %" PRIu8 "\n",
(int) (20 + level * 2), "", (uintmax_t) offset,
known[op] ?: "???", *((uint8_t *) data));
++data;
--len;
offset += 2;
break;
case DW_OP_const2u:
printf (" %*s [%4" PRIuMAX "] %s %" PRIu16 "\n",
(int) (20 + level * 2), "", (uintmax_t) offset,
known[op] ?: "???", read_2ubyte_unaligned (dbg, data));
len -= 2;
data += 2;
offset += 3;
break;
case DW_OP_const4u:
printf (" %*s [%4" PRIuMAX "] %s %" PRIu32 "\n",
(int) (20 + level * 2), "", (uintmax_t) offset,
known[op] ?: "???", read_4ubyte_unaligned (dbg, data));
len -= 4;
data += 4;
offset += 5;
break;
case DW_OP_const8u:
printf (" %*s [%4" PRIuMAX "] %s %" PRIu64 "\n",
(int) (20 + level * 2), "", (uintmax_t) offset,
known[op] ?: "???", read_8ubyte_unaligned (dbg, data));
len -= 8;
data += 8;
offset += 9;
break;
case DW_OP_const1s:
printf (" %*s [%4" PRIuMAX "] %s %" PRId8 "\n",
(int) (20 + level * 2), "", (uintmax_t) offset,
known[op] ?: "???", *((int8_t *) data));
++data;
--len;
offset += 2;
break;
case DW_OP_const2s:
printf (" %*s [%4" PRIuMAX "] %s %" PRId16 "\n",
(int) (20 + level * 2), "", (uintmax_t) offset,
known[op] ?: "???", read_2sbyte_unaligned (dbg, data));
len -= 2;
data += 2;
offset += 3;
break;
case DW_OP_const4s:
printf (" %*s [%4" PRIuMAX "] %s %" PRId32 "\n",
(int) (20 + level * 2), "", (uintmax_t) offset,
known[op] ?: "???", read_4sbyte_unaligned (dbg, data));
len -= 4;
data += 4;
offset += 5;
break;
case DW_OP_const8s:
printf (" %*s [%4" PRIuMAX "] %s %" PRId64 "\n",
(int) (20 + level * 2), "", (uintmax_t) offset,
known[op] ?: "???", read_8sbyte_unaligned (dbg, data));
len -= 8;
data += 8;
offset += 9;
break;
case DW_OP_piece: /* XXX Correct? */
case DW_OP_regx:
case DW_OP_plus_uconst:
case DW_OP_constu:;
unsigned char *start = data;
unsigned int uleb;
get_uleb128 (uleb, data);
printf (" %*s [%4" PRIuMAX "] %s %u\n",
(int) (20 + level * 2), "", (uintmax_t) offset,
known[op] ?: "???", uleb);
len -= data - start;
offset += 1 + (data - start);
break;
case DW_OP_fbreg:
case DW_OP_breg0 ... DW_OP_breg31:
case DW_OP_consts:
start = data;
unsigned int sleb;
get_sleb128 (sleb, data);
printf (" %*s [%4" PRIuMAX "] %s %d\n",
(int) (20 + level * 2), "", (uintmax_t) offset,
known[op] ?: "???", sleb);
len -= data - start;
offset += 1 + (data - start);
break;
case DW_OP_bregx:
start = data;
get_uleb128 (uleb, data);
get_sleb128 (sleb, data);
printf (" %*s [%4" PRIuMAX "] %s %u %d\n",
(int) (20 + level * 2), "", (uintmax_t) offset,
known[op] ?: "???", uleb, sleb);
len -= data - start;
offset += 1 + (data - start);
break;
case DW_OP_call2:
case DW_OP_call4:
case DW_OP_skip:
case DW_OP_bra:
printf (" %*s [%4" PRIuMAX "] %s %" PRIuMAX "\n",
(int) (20 + level * 2), "", (uintmax_t) offset,
known[op] ?: "???",
(uintmax_t) (offset + read_2sbyte_unaligned (dbg, data)));
len -= 2;
data += 2;
offset += 3;
break;
default:
/* No Operand. */
printf (" %*s [%4" PRIuMAX "] %s\n",
(int) (20 + level * 2), "", (uintmax_t) offset,
known[op] ?: "???");
++offset;
break;
}
}
}
static void
print_debug_abbrev_section (Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn,
GElf_Shdr *shdr, Dwarf *dbg)
{
printf (gettext ("\nDWARF section '%s' at offset %#" PRIx64 ":\n"
" [ Code]\n"),
".debug_abbrev", (uint64_t) shdr->sh_offset);
Dwarf_Off offset = 0;
while (1)
{
size_t length;
Dwarf_Abbrev abbrev;
if (dwarf_offabbrev (dbg, offset, &length, &abbrev) != 0)
{
printf (gettext (" *** error while reading abbreviation: %s\n"),
dwarf_errmsg (-1));
break;
}
if (length == 1)
/* This is the NUL byte at the end of the section. */
break;
/* We know these calls can never fail. */
unsigned int code = dwarf_getabbrevcode (&abbrev);
unsigned int tag = dwarf_getabbrevtag (&abbrev);
int has_children = dwarf_abbrevhaschildren (&abbrev);
printf (gettext (" [%5u] offset: %" PRId64
", children: %s, tag: %s\n"),
code, (int64_t) offset,
has_children ? gettext ("yes") : gettext ("no"),
dwarf_tag_string (tag));
size_t cnt = 0;
unsigned int name;
unsigned int form;
Dwarf_Off enoffset;
while (dwarf_getabbrevattr (&abbrev, cnt, &name, &form, &enoffset) == 0)
{
printf (" attr: %s, form: %s, offset: %#" PRIx64 "\n",
dwarf_attr_string (name), dwarf_form_string (form),
(uint64_t) enoffset);
++cnt;
}
offset += length;
}
}
/* Print content of DWARF .debug_aranges section. We fortunately do
not have to know a bit about the structure of the section, libdwarf
takes care of it. */
static void
print_debug_aranges_section (Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn,
GElf_Shdr *shdr, Dwarf *dbg)
{
Dwarf_Aranges *aranges;
size_t cnt;
if (dwarf_getaranges (dbg, &aranges, &cnt) != 0)
{
error (0, 0, gettext ("cannot get .debug_aranges content: %s"),
dwarf_errmsg (-1));
return;
}
printf (ngettext ("\
\nDWARF section '%s' at offset %#" PRIx64 " contains %zu entry:\n",
"\
\nDWARF section '%s' at offset %#" PRIx64 " contains %zu entries:\n",
cnt),
".debug_aranges", (uint64_t) shdr->sh_offset, cnt);
/* Compute floor(log16(cnt)). */
size_t tmp = cnt;
int digits = 1;
while (tmp >= 16)
{
++digits;
tmp >>= 4;
}
for (size_t n = 0; n < cnt; ++n)
{
Dwarf_Arange *runp = dwarf_onearange (aranges, n);
if (runp == NULL)
{
printf ("cannot get arange %zu: %s\n", n, dwarf_errmsg (-1));
return;
}
Dwarf_Addr start;
Dwarf_Word length;
Dwarf_Off offset;
if (dwarf_getarangeinfo (runp, &start, &length, &offset) != 0)
printf (gettext (" [%*zu] ???\n"), digits, n);
else
printf (gettext (" [%*zu] start: %0#*" PRIx64
", length: %5" PRIu64 ", CU DIE offset: %6"
PRId64 "\n"),
digits, n, ehdr->e_ident[EI_CLASS] == ELFCLASS32 ? 10 : 18,
(uint64_t) start, (uint64_t) length, (int64_t) offset);
}
}
static void
print_debug_frame_section (Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn,
GElf_Shdr *shdr, Dwarf *dbg)
{
}
struct attrcb_args
{
Dwarf *dbg;
int level;
unsigned int addrsize;
Dwarf_Off cu_offset;
};
static int
attr_callback (Dwarf_Attribute *attrp, void *arg)
{
struct attrcb_args *cbargs = (struct attrcb_args *) arg;
const int level = cbargs->level;
unsigned int attr = dwarf_whatattr (attrp);
if (unlikely (attr == 0))
{
error (0, 0, gettext ("cannot get attribute code: %s"),
dwarf_errmsg (-1));
return DWARF_CB_ABORT;
}
unsigned int form = dwarf_whatform (attrp);
if (unlikely (form == 0))
{
error (0, 0, gettext ("cannot get attribute form: %s"),
dwarf_errmsg (-1));
return DWARF_CB_ABORT;
}
switch (form)
{
case DW_FORM_addr:;
Dwarf_Addr addr;
if (unlikely (dwarf_formaddr (attrp, &addr) != 0))
{
attrval_out:
error (0, 0, gettext ("cannot get attribute value: %s"),
dwarf_errmsg (-1));
return DWARF_CB_ABORT;
}
printf (" %*s%-20s %#0*" PRIxMAX "\n",
(int) (level * 2), "", dwarf_attr_string (attr),
(int) (cbargs->addrsize * 2), (uintmax_t) addr);
break;
case DW_FORM_indirect:
case DW_FORM_strp:
case DW_FORM_string:;
const char *str = dwarf_formstring (attrp);
if (unlikely (str == NULL))
goto attrval_out;
printf (" %*s%-20s \"%s\"\n",
(int) (level * 2), "", dwarf_attr_string (attr), str);
break;
case DW_FORM_ref_addr:
case DW_FORM_ref_udata:
case DW_FORM_ref8:
case DW_FORM_ref4:
case DW_FORM_ref2:
case DW_FORM_ref1:;
Dwarf_Off ref;
if (unlikely (dwarf_formref (attrp, &ref) != 0))
goto attrval_out;
printf (" %*s%-20s [%6" PRIxMAX "]\n",
(int) (level * 2), "", dwarf_attr_string (attr),
(uintmax_t) (ref + cbargs->cu_offset));
break;
case DW_FORM_udata:
case DW_FORM_sdata:
case DW_FORM_data8:
case DW_FORM_data4:
case DW_FORM_data2:
case DW_FORM_data1:;
Dwarf_Word num;
if (unlikely (dwarf_formudata (attrp, &num) != 0))
goto attrval_out;
if (attr == DW_AT_language)
{
printf (" %*s%-20s %s (%d)\n",
(int) (level * 2), "", dwarf_attr_string (attr),
dwarf_lang_string (num), (int) num);
break;
}
printf (" %*s%-20s %" PRIuMAX "\n",
(int) (level * 2), "", dwarf_attr_string (attr),
(uintmax_t) num);
break;
case DW_FORM_flag:;
bool flag;
if (unlikely (dwarf_formflag (attrp, &flag) != 0))
goto attrval_out;
printf (" %*s%-20s %s\n",
(int) (level * 2), "", dwarf_attr_string (attr),
nl_langinfo (flag ? YESSTR : NOSTR));
break;
case DW_FORM_block4:
case DW_FORM_block2:
case DW_FORM_block1:
case DW_FORM_block:;
Dwarf_Block block;
if (unlikely (dwarf_formblock (attrp, &block) != 0))
goto attrval_out;
printf (" %*s%-20s %" PRIxMAX " byte block\n",
(int) (level * 2), "", dwarf_attr_string (attr),
(uintmax_t) block.length);
if (attr == DW_AT_data_member_location)
print_ops (cbargs->dbg, level, cbargs->addrsize, block.length,
block.data);
break;
default:
printf (" %*s%-20s [form: %d] ???\n",
(int) (level * 2), "", dwarf_attr_string (attr),
(int) form);
break;
}
return DWARF_CB_OK;
}
static void
print_debug_info_section (Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn,
GElf_Shdr *shdr, Dwarf *dbg)
{
printf (gettext ("\
\nDWARF section '%s' at offset %#" PRIx64 ":\n [Offset]\n"),
".debug_info", (uint64_t) shdr->sh_offset);
/* If the section is empty we don't have to do anything. */
if (shdr->sh_size == 0)
return;
size_t maxdies = 20;
Dwarf_Die *dies = (Dwarf_Die *) xmalloc (maxdies * sizeof (Dwarf_Die));
Dwarf_Off offset = 0;
/* New compilation unit. */
size_t cuhl;
//Dwarf_Half version;
Dwarf_Off abbroffset;
uint8_t addrsize;
uint8_t offsize;
Dwarf_Off nextcu;
next_cu:
if (dwarf_nextcu (dbg, offset, &nextcu, &cuhl, &abbroffset, &addrsize,
&offsize) != 0)
goto do_return;
printf (gettext (" Compilation unit at offset %" PRIu64 ":\n"
" Version: %" PRIu16 ", Abbreviation section offset: %"
PRIu64 ", Address size: %" PRIu8 ", Offset size: %" PRIu8 "\n"),
(uint64_t) offset, /*version*/2, abbroffset, addrsize, offsize);
struct attrcb_args args;
args.dbg = dbg;
args.addrsize = addrsize;
args.cu_offset = offset;
offset += cuhl;
int level = 0;
if (unlikely (dwarf_offdie (dbg, offset, &dies[level]) == NULL))
{
error (0, 0, gettext ("cannot get DIE at offset %" PRIu64
" in section '%s': %s"),
(uint64_t) offset, ".debug_info", dwarf_errmsg (-1));
goto do_return;
}
do
{
offset = dwarf_dieoffset (&dies[level]);
if (offset == -1l)
{
error (0, 0, gettext ("cannot get DIE offset: %s"),
dwarf_errmsg (-1));
goto do_return;
}
int tag = dwarf_tag (&dies[level]);
if (tag == DW_TAG_invalid)
{
error (0, 0, gettext ("cannot get tag of DIE at offset %" PRIu64
" in section '%s': %s"),
(uint64_t) offset, ".debug_info", dwarf_errmsg (-1));
goto do_return;
}
static const char *const lowtags[] =
{
[DW_TAG_array_type] = "array_type",
[DW_TAG_class_type] = "class_type",
[DW_TAG_entry_point] = "entry_point",
[DW_TAG_enumeration_type] = "enumeration_type",
[DW_TAG_formal_parameter] = "formal_parameter",
[DW_TAG_imported_declaration] = "imported_declaration",
[DW_TAG_label] = "label",
[DW_TAG_lexical_block] = "lexical_block",
[DW_TAG_member] = "member",
[DW_TAG_pointer_type] = "pointer_type",
[DW_TAG_reference_type] = "reference_type",
[DW_TAG_compile_unit] = "compile_unit",
[DW_TAG_string_type] = "string_type",
[DW_TAG_structure_type] = "structure_type",
[DW_TAG_subroutine_type] = "subroutine_type",
[DW_TAG_typedef] = "typedef",
[DW_TAG_union_type] = "union_type",
[DW_TAG_unspecified_parameters] = "unspecified_parameters",
[DW_TAG_variant] = "variant",
[DW_TAG_common_block] = "common_block",
[DW_TAG_common_inclusion] = "common_inclusion",
[DW_TAG_inheritance] = "inheritance",
[DW_TAG_inlined_subroutine] = "inlined_subroutine",
[DW_TAG_module] = "module",
[DW_TAG_ptr_to_member_type] = "ptr_to_member_type",
[DW_TAG_set_type] = "set_type",
[DW_TAG_subrange_type] = "subrange_type",
[DW_TAG_with_stmt] = "with_stmt",
[DW_TAG_access_declaration] = "access_declaration",
[DW_TAG_base_type] = "base_type",
[DW_TAG_catch_block] = "catch_block",
[DW_TAG_const_type] = "const_type",
[DW_TAG_constant] = "constant",
[DW_TAG_enumerator] = "enumerator",
[DW_TAG_file_type] = "file_type",
[DW_TAG_friend] = "friend",
[DW_TAG_namelist] = "namelist",
[DW_TAG_namelist_item] = "namelist_item",
[DW_TAG_packed_type] = "packed_type",
[DW_TAG_subprogram] = "subprogram",
[DW_TAG_template_type_param] = "template_type_param",
[DW_TAG_template_value_param] = "template_value_param",
[DW_TAG_thrown_type] = "thrown_type",
[DW_TAG_try_block] = "try_block",
[DW_TAG_variant_part] = "variant_part",
[DW_TAG_variable] = "variable",
[DW_TAG_volatile_type] = "volatile_type"
};
const char *tagstr;
switch (tag)
{
case DW_TAG_lo_user:
tagstr = "lo_user";
break;
case DW_TAG_MIPS_loop:
tagstr = "MIPS_loop";
break;
case DW_TAG_format_label:
tagstr = "format_label";
break;
case DW_TAG_function_template:
tagstr = "function_template";
break;
case DW_TAG_class_template:
tagstr = "class_template";
break;
case DW_TAG_hi_user:
tagstr = "hi_user";
break;
default:
if (tag < sizeof (lowtags) / sizeof (lowtags[0]))
tagstr = lowtags[tag];
else
tagstr = "???";
break;
}
printf (" [%6" PRIx64 "] %*s%s\n",
(uint64_t) offset, (int) (level * 2), "", tagstr);
/* Print the attribute values. */
args.level = level;
(void) dwarf_getattrs (&dies[level], attr_callback, &args, 0);
/* Make room for the next level's DIE. */
if (level + 1 == maxdies)
dies = (Dwarf_Die *) xrealloc (dies,
(maxdies += 10)
* sizeof (Dwarf_Die));
int res = dwarf_child (&dies[level], &dies[level + 1]);
if (res > 0)
{
while ((res = dwarf_siblingof (&dies[level], &dies[level])) == 1)
if (level-- == 0)
break;
if (res == -1)
{
error (0, 0, gettext ("cannot get next DIE: %s\n"),
dwarf_errmsg (-1));
goto do_return;
}
}
else if (unlikely (res < 0))
{
error (0, 0, gettext ("cannot get next DIE: %s"),
dwarf_errmsg (-1));
goto do_return;
}
else
++level;
}
while (level >= 0);
offset = nextcu;
if (offset != 0)
goto next_cu;
do_return:
free (dies);
}
static void
print_debug_line_section (Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn,
GElf_Shdr *shdr, Dwarf *dbg)
{
printf (gettext ("\
\nDWARF section '%s' at offset %#" PRIx64 ":\n"),
".debug_line", (uint64_t) shdr->sh_offset);
if (shdr->sh_size == 0)
return;
/* There is no functionality in libdw to read the information in the
way it is represented here. Hardcode the decoder. */
Elf_Data *data = elf_getdata (scn, NULL);
if (data == NULL || data->d_buf == NULL)
{
error (0, 0, gettext ("cannot get line data section data: %s"),
elf_errmsg (-1));
return;
}
const unsigned char *linep = (const unsigned char *) data->d_buf;
const unsigned char *lineendp;
while (linep
< (lineendp = (const unsigned char *) data->d_buf + data->d_size))
{
size_t start_offset = linep - (const unsigned char *) data->d_buf;
Dwarf_Word unit_length = read_4ubyte_unaligned_inc (dbg, linep);
unsigned int length = 4;
if (unlikely (unit_length == 0xffffffff))
{
if (unlikely (linep + 8 > lineendp))
{
invalid_data:
error (0, 0, gettext ("invalid data in section [%zu] '%s'"),
elf_ndxscn (scn), ".debug_line");
return;
}
unit_length = read_8ubyte_unaligned_inc (dbg, linep);
length = 8;
}
/* Check whether we have enough room in the section. */
if (unit_length < 2 + length + 5 * 1
|| unlikely (linep + unit_length > lineendp))
goto invalid_data;
lineendp = linep + unit_length;
/* The next element of the header is the version identifier. */
uint_fast16_t version = read_2ubyte_unaligned_inc (dbg, linep);
/* Next comes the header length. */
Dwarf_Word header_length;
if (length == 4)
header_length = read_4ubyte_unaligned_inc (dbg, linep);
else
header_length = read_8ubyte_unaligned_inc (dbg, linep);
//const unsigned char *header_start = linep;
/* Next the minimum instruction length. */
uint_fast8_t minimum_instr_len = *linep++;
/* Then the flag determining the default value of the is_stmt
register. */
uint_fast8_t default_is_stmt = *linep++;
/* Now the line base. */
int_fast8_t line_base = *((const int_fast8_t *) linep);
++linep;
/* And the line range. */
uint_fast8_t line_range = *linep++;
/* The opcode base. */
uint_fast8_t opcode_base = *linep++;
/* Print what we got so far. */
printf (gettext ("\n"
" Length: %" PRIu64 "\n"
" DWARF version: %" PRIuFAST16 "\n"
" Prologue length: %" PRIu64 "\n"
" Minimum instruction length: %" PRIuFAST8 "\n"
" Initial value if '%s': %" PRIuFAST8 "\n"
" Line base: %" PRIdFAST8 "\n"
" Line range: %" PRIuFAST8 "\n"
" Opcode base: %" PRIuFAST8 "\n"
"\n"
"Opcodes:\n"),
(uint64_t) unit_length, version, (uint64_t) header_length,
minimum_instr_len, "is_stmt", default_is_stmt, line_base,
line_range, opcode_base);
if (unlikely (linep + opcode_base - 1 >= lineendp))
goto invalid_data;
int opcode_base_l10 = 1;
unsigned int tmp = opcode_base;
while (tmp > 10)
{
tmp /= 10;
++opcode_base_l10;
}
const uint8_t *standard_opcode_lengths = linep - 1;
for (uint_fast8_t cnt = 1; cnt < opcode_base; ++cnt)
printf (ngettext (" [%*" PRIuFAST8 "] %hhu argument\n",
" [%*" PRIuFAST8 "] %hhu arguments\n",
(int) linep[cnt - 1]),
opcode_base_l10, cnt, linep[cnt - 1]);
linep += opcode_base - 1;
if (unlikely (linep >= lineendp))
goto invalid_data;
puts (gettext ("\nDirectory table:"));
while (*linep != 0)
{
unsigned char *endp = memchr (linep, '\0', lineendp - linep);
if (endp == NULL)
goto invalid_data;
printf (" %s\n", (char *) linep);
linep = endp + 1;
}
/* Skip the final NUL byte. */
++linep;
if (unlikely (linep >= lineendp))
goto invalid_data;
puts (gettext ("\nFile name table:\n"
" Entry Dir Time Size Name"));
for (unsigned int cnt = 1; *linep != 0; ++cnt)
{
/* First comes the file name. */
char *fname = (char *) linep;
unsigned char *endp = memchr (fname, '\0', lineendp - linep);
if (endp == NULL)
goto invalid_data;
linep = endp + 1;
/* Then the index. */
unsigned int diridx;
get_uleb128 (diridx, linep);
/* Next comes the modification time. */
unsigned int mtime;
get_uleb128 (mtime, linep);
/* Finally the length of the file. */
unsigned int fsize;
get_uleb128 (fsize, linep);
printf (" %-5u %-5u %-9u %-9u %s\n",
cnt, diridx, mtime, fsize, fname);
}
/* Skip the final NUL byte. */
++linep;
puts (gettext ("\nLine number statements:"));
Dwarf_Word address = 0;
size_t line = 1;
uint_fast8_t is_stmt = default_is_stmt;
/* Default address value, in case we do not find the CU. */
size_t address_size
= elf_getident (ebl->elf, NULL)[EI_CLASS] == ELFCLASS32 ? 4 : 8;
/* Determine the CU this block is for. */
Dwarf_Off cuoffset;
Dwarf_Off ncuoffset = 0;
size_t hsize;
while (dwarf_nextcu (dbg, cuoffset = ncuoffset, &ncuoffset, &hsize,
NULL, NULL, NULL) == 0)
{
Dwarf_Die cudie;
if (dwarf_offdie (dbg, cuoffset + hsize, &cudie) == NULL)
continue;
Dwarf_Attribute stmt_list;
if (dwarf_attr (&cudie, DW_AT_stmt_list, &stmt_list) == NULL)
continue;
Dwarf_Word lineoff;
if (dwarf_formudata (&stmt_list, &lineoff) != 0)
continue;
if (lineoff == start_offset)
{
/* Found the CU. */
address_size = cudie.cu->address_size;
break;
}
}
while (linep < lineendp)
{
unsigned int u128;
int s128;
/* Read the opcode. */
unsigned int opcode = *linep++;
/* Is this a special opcode? */
if (likely (opcode >= opcode_base))
{
/* Yes. Handling this is quite easy since the opcode value
is computed with
opcode = (desired line increment - line_base)
+ (line_range * address advance) + opcode_base
*/
int line_increment = (line_base
+ (opcode - opcode_base) % line_range);
unsigned int address_increment = (minimum_instr_len
* ((opcode - opcode_base)
/ line_range));
/* Perform the increments. */
line += line_increment;
address += address_increment;
printf (gettext ("\
special opcode %u: address+%u = %#" PRIx64 ", line%+d = %zu\n"),
opcode, address_increment, (uint64_t) address,
line_increment, line);
}
else if (opcode == 0)
{
/* This an extended opcode. */
if (unlikely (linep + 2 > lineendp))
goto invalid_data;
/* The length. */
unsigned int len = *linep++;
if (unlikely (linep + len > lineendp))
goto invalid_data;
/* The sub-opcode. */
opcode = *linep++;
printf (gettext (" extended opcode %u: "), opcode);
switch (opcode)
{
case DW_LNE_end_sequence:
puts (gettext ("end of sequence"));
/* Reset the registers we care about. */
address = 0;
line = 1;
is_stmt = default_is_stmt;
break;
case DW_LNE_set_address:
if (address_size == 4)
address = read_4ubyte_unaligned_inc (dbg, linep);
else
address = read_8ubyte_unaligned_inc (dbg, linep);
printf (gettext ("set address to %#" PRIx64 "\n"),
(uint64_t) address);
break;
case DW_LNE_define_file:
{
char *fname = (char *) linep;
unsigned char *endp = memchr (linep, '\0',
lineendp - linep);
if (endp == NULL)
goto invalid_data;
linep = endp + 1;
unsigned int diridx;
get_uleb128 (diridx, linep);
Dwarf_Word mtime;
get_uleb128 (mtime, linep);
Dwarf_Word filelength;
get_uleb128 (filelength, linep);
printf (gettext ("\
define new file: dir=%u, mtime=%" PRIu64 ", length=%" PRIu64 ", name=%s\n"),
diridx, (uint64_t) mtime, (uint64_t) filelength,
fname);
}
break;
default:
/* Unknown, ignore it. */
puts (gettext ("unknown opcode"));
linep += len - 1;
break;
}
}
else if (opcode <= DW_LNS_set_epilog_begin)
{
/* This is a known standard opcode. */
switch (opcode)
{
case DW_LNS_copy:
/* Takes no argument. */
puts (gettext (" copy"));
break;
case DW_LNS_advance_pc:
/* Takes one uleb128 parameter which is added to the
address. */
get_uleb128 (u128, linep);
address += minimum_instr_len * u128;
printf (gettext ("\
advance address by %u to %#" PRIx64 "\n"),
u128, (uint64_t) address);
break;
case DW_LNS_advance_line:
/* Takes one sleb128 parameter which is added to the
line. */
get_sleb128 (s128, linep);
line += s128;
printf (gettext ("\
advance line by constant %d to %" PRId64 "\n"),
s128, (int64_t) line);
break;
case DW_LNS_set_file:
/* Takes one uleb128 parameter which is stored in file. */
get_uleb128 (u128, linep);
printf (gettext (" set file to %" PRIu64 "\n"),
(uint64_t) u128);
break;
case DW_LNS_set_column:
/* Takes one uleb128 parameter which is stored in column. */
if (unlikely (standard_opcode_lengths[opcode] != 1))
goto invalid_data;
get_uleb128 (u128, linep);
printf (gettext (" set column to %" PRIu64 "\n"),
(uint64_t) u128);
break;
case DW_LNS_negate_stmt:
/* Takes no argument. */
is_stmt = 1 - is_stmt;
printf (gettext (" set '%s' to %" PRIuFAST8 "\n"),
"is_stmt", is_stmt);
break;
case DW_LNS_set_basic_block:
/* Takes no argument. */
puts (gettext (" set basic block flag"));
break;
case DW_LNS_const_add_pc:
/* Takes no argument. */
u128 = (minimum_instr_len
* ((255 - opcode_base) / line_range));
address += u128;
printf (gettext ("\
advance address by constant %u to %#" PRIx64 "\n"),
u128, (uint64_t) address);
break;
case DW_LNS_fixed_advance_pc:
/* Takes one 16 bit parameter which is added to the
address. */
if (unlikely (standard_opcode_lengths[opcode] != 1))
goto invalid_data;
u128 = read_2ubyte_unaligned_inc (dbg, linep);
address += u128;
printf (gettext ("\
advance address by fixed value %u to %#" PRIx64 "\n"),
u128, (uint64_t) address);
break;
case DW_LNS_set_prologue_end:
/* Takes no argument. */
puts (gettext (" set prologue end flag"));
break;
case DW_LNS_set_epilog_begin:
/* Takes no argument. */
puts (gettext (" set epilogue begin flag"));
break;
}
}
else
{
/* This is a new opcode the generator but not we know about.
Read the parameters associated with it but then discard
everything. Read all the parameters for this opcode. */
printf (ngettext (" unknown opcode with %" PRIu8 " parameter:",
" unknown opcode with %" PRIu8 " parameters:",
standard_opcode_lengths[opcode]),
standard_opcode_lengths[opcode]);
for (int n = standard_opcode_lengths[opcode]; n > 0; --n)
{
get_uleb128 (u128, linep);
if (n != standard_opcode_lengths[opcode])
putc_unlocked (',', stdout);
printf (" %u", u128);
}
/* Next round, ignore this opcode. */
continue;
}
}
}
/* There must only be one data block. */
assert (elf_getdata (scn, data) == NULL);
}
static void
print_debug_loc_section (Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn,
GElf_Shdr *shdr, Dwarf *dbg)
{
printf (gettext ("\
\nDWARF section '%s' at offset %#" PRIx64 ":\n"),
".debug_loc", (uint64_t) shdr->sh_offset);
// XXX add something
}
struct mac_culist
{
Dwarf_Die die;
Dwarf_Off offset;
Dwarf_Files *files;
struct mac_culist *next;
};
static int
mac_compare (const void *p1, const void *p2)
{
struct mac_culist *m1 = (struct mac_culist *) p1;
struct mac_culist *m2 = (struct mac_culist *) p2;
if (m1->offset < m2->offset)
return -1;
if (m1->offset > m2->offset)
return 1;
return 0;
}
static void
print_debug_macinfo_section (Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn,
GElf_Shdr *shdr, Dwarf *dbg)
{
printf (gettext ("\
\nDWARF section '%s' at offset %#" PRIx64 ":\n"),
".debug_macinfo", (uint64_t) shdr->sh_offset);
putc_unlocked ('\n', stdout);
/* There is no function in libdw to iterate over the raw content of
the section but it is easy enough to do. */
Elf_Data *data = elf_getdata (scn, NULL);
if (data == NULL || data->d_buf == NULL)
{
error (0, 0, gettext ("cannot get macro information section data: %s"),
elf_errmsg (-1));
return;
}
/* Get the source file information for all CUs. */
Dwarf_Off offset;
Dwarf_Off ncu = 0;
size_t hsize;
struct mac_culist *culist = NULL;
size_t nculist = 0;
while (dwarf_nextcu (dbg, offset = ncu, &ncu, &hsize, NULL, NULL, NULL) == 0)
{
Dwarf_Die cudie;
if (dwarf_offdie (dbg, offset + hsize, &cudie) == NULL)
continue;
Dwarf_Attribute attr;
if (dwarf_attr (&cudie, DW_AT_macro_info, &attr) == NULL)
continue;
Dwarf_Word macoff;
if (dwarf_formudata (&attr, &macoff) != 0)
continue;
struct mac_culist *newp = (struct mac_culist *) alloca (sizeof (*newp));
newp->die = cudie;
newp->offset = macoff;
newp->files = NULL;
newp->next = culist;
culist = newp;
++nculist;
}
/* Convert the list into an array for easier consumption. */
struct mac_culist *cus = (struct mac_culist *) alloca ((nculist + 1)
* sizeof (*cus));
/* Add sentinel. */
cus[nculist].offset = data->d_size;
if (nculist > 0)
{
for (size_t cnt = nculist - 1; culist != NULL; --cnt)
{
assert (cnt < nculist);
cus[cnt] = *culist;
culist = culist->next;
}
/* Sort the array according to the offset in the .debug_macinfo
section. Note we keep the sentinel at the end. */
qsort (cus, nculist, sizeof (*cus), mac_compare);
}
const unsigned char *readp = (const unsigned char *) data->d_buf;
const unsigned char *readendp = readp + data->d_size;
int level = 1;
while (readp < readendp)
{
unsigned int opcode = *readp++;
unsigned int u128;
unsigned int u128_2;
const unsigned char *endp;
switch (opcode)
{
case DW_MACINFO_define:
case DW_MACINFO_undef:
case DW_MACINFO_vendor_ext:
/* For the first two opcodes the parameters are
line, string
For the latter
number, string.
We can treat these cases together. */
get_uleb128 (u128, readp);
endp = memchr (readp, '\0', readendp - readp);
if (endp == NULL)
{
printf (gettext ("\
%*s*** non-terminated string at end of section"),
level, "");
return;
}
if (opcode == DW_MACINFO_define)
printf ("%*s#define %s, line %u\n",
level, "", (char *) readp, u128);
else if (opcode == DW_MACINFO_undef)
printf ("%*s#undef %s, line %u\n",
level, "", (char *) readp, u128);
else
printf (" #vendor-ext %s, number %u\n", (char *) readp, u128);
readp = endp + 1;
break;
case DW_MACINFO_start_file:
/* The two parameters are line and file index, in this order. */
get_uleb128 (u128, readp);
get_uleb128 (u128_2, readp);
/* Find the CU DIE for this file. */
ptrdiff_t macoff = readp - (const unsigned char *) data->d_buf;
const char *fname = "???";
if (macoff >= cus[0].offset)
{
while (macoff >= cus[1].offset)
++cus;
if (cus[0].files == NULL
&& dwarf_getsrcfiles (&cus[0].die, &cus[0].files, NULL) != 0)
cus[0].files = (Dwarf_Files *) -1l;
if (cus[0].files != (Dwarf_Files *) -1l)
fname = (dwarf_filesrc (cus[0].files, u128_2, NULL, NULL)
?: "???");
}
printf ("%*sstart_file %u, [%u] %s\n",
level, "", u128, u128_2, fname);
++level;
break;
case DW_MACINFO_end_file:
--level;
printf ("%*send_file\n", level, "");
/* Nothing more to do. */
break;
default:
// XXX gcc seems to generate files with a trailing zero.
if (opcode != 0 || readp != readendp)
printf ("%*s*** invalid opcode %u\n", level, "", opcode);
break;
}
}
}
/* Callback for printing global names. */
static int
print_pubnames (Dwarf *dbg, Dwarf_Global *global, void *arg)
{
int *np = (int *) arg;
printf (gettext (" [%5d] DIE offset: %6" PRId64
", CU DIE offset: %6" PRId64 ", name: %s\n"),
(*np)++, global->die_offset, global->cu_offset, global->name);
return 0;
}
/* Print the known exported symbols in the DWARF section '.debug_pubnames'. */
static void
print_debug_pubnames_section (Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn,
GElf_Shdr *shdr, Dwarf *dbg)
{
printf (gettext ("\nDWARF section '%s' at offset %#" PRIx64 ":\n"),
".debug_pubnames", (uint64_t) shdr->sh_offset);
int n = 0;
(void) dwarf_getpubnames (dbg, print_pubnames, &n, 0);
}
/* Print the content of the DWARF string section '.debug_str'. */
static void
print_debug_str_section (Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn,
GElf_Shdr *shdr, Dwarf *dbg)
{
/* Compute floor(log16(shdr->sh_size)). */
GElf_Addr tmp = shdr->sh_size;
int digits = 1;
while (tmp >= 16)
{
++digits;
tmp >>= 4;
}
digits = MAX (4, digits);
printf (gettext ("\nDWARF section '%s' at offset %#" PRIx64 ":\n"
" %*s String\n"),
".debug_str", (uint64_t) shdr->sh_offset,
/* TRANS: the debugstr| prefix makes the string unique. */
digits + 2, sgettext ("debugstr|Offset"));
Dwarf_Off offset = 0;
while (offset < shdr->sh_size)
{
size_t len;
const char *str = dwarf_getstring (dbg, offset, &len);
if (str == NULL)
{
printf (gettext (" *** error while reading strings: %s\n"),
dwarf_errmsg (-1));
break;
}
printf (" [%*" PRIx64 "] \"%s\"\n", digits, (uint64_t) offset, str);
offset += len + 1;
}
}
static void
print_debug (Ebl *ebl, GElf_Ehdr *ehdr)
{
/* Find the version information sections. For this we have to
search through the section table. */
Dwarf *dbg;
Elf_Scn *scn;
size_t shstrndx;
/* Before we start the real work get a debug context descriptor. */
dbg = dwarf_begin_elf (ebl->elf, DWARF_C_READ, NULL);
if (dbg == NULL)
{
error (0, 0, gettext ("cannot get debug context descriptor: %s"),
dwarf_errmsg (-1));
return;
}
/* Get the section header string table index. */
if (elf_getshstrndx (ebl->elf, &shstrndx) < 0)
error (EXIT_FAILURE, 0,
gettext ("cannot get section header string table index"));
scn = NULL;
while ((scn = elf_nextscn (ebl->elf, scn)) != NULL)
{
/* Handle the section if it is part of the versioning handling. */
GElf_Shdr shdr_mem;
GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
if (shdr != NULL || shdr->sh_type != SHT_PROGBITS)
{
static const struct
{
const char *name;
enum section_e bitmask;
void (*fp) (Ebl *, GElf_Ehdr *, Elf_Scn *, GElf_Shdr *, Dwarf *);
} debug_sections[] =
{
#define NEW_SECTION(name) \
{ ".debug_" #name, section_##name, print_debug_##name##_section }
NEW_SECTION (abbrev),
NEW_SECTION (aranges),
NEW_SECTION (frame),
NEW_SECTION (info),
NEW_SECTION (line),
NEW_SECTION (loc),
NEW_SECTION (pubnames),
NEW_SECTION (str),
NEW_SECTION (macinfo),
{ ".eh_frame", section_frame, print_debug_frame_section }
};
const int ndebug_sections = (sizeof (debug_sections)
/ sizeof (debug_sections[0]));
const char *name = elf_strptr (ebl->elf, shstrndx,
shdr->sh_name);
int n;
for (n = 0; n < ndebug_sections; ++n)
if (strcmp (name, debug_sections[n].name) == 0)
{
if (print_debug_sections & debug_sections[n].bitmask)
debug_sections[n].fp (ebl, ehdr, scn, shdr, dbg);
break;
}
}
}
/* We are done with the DWARF handling. */
dwarf_end (dbg);
}
static void
handle_notes (Ebl *ebl, GElf_Ehdr *ehdr)
{
int class = gelf_getclass (ebl->elf);
size_t cnt;
/* We have to look through the program header to find the note
sections. There can be more than one. */
for (cnt = 0; cnt < ehdr->e_phnum; ++cnt)
{
GElf_Phdr mem;
GElf_Phdr *phdr = gelf_getphdr (ebl->elf, cnt, &mem);
if (phdr == NULL || phdr->p_type != PT_NOTE)
/* Not what we are looking for. */
continue;
printf (gettext ("\
\nNote segment of %" PRId64 " bytes at offset %#0" PRIx64 ":\n"),
phdr->p_filesz, phdr->p_offset);
char *notemem = gelf_rawchunk (ebl->elf, phdr->p_offset, phdr->p_filesz);
if (notemem == NULL)
error (EXIT_FAILURE, 0,
gettext ("cannot get content of note section: %s"),
elf_errmsg (-1));
fputs_unlocked (gettext (" Owner Data size Type\n"), stdout);
/* Handle the note section content. It consists of one or more
entries each of which consists of five parts:
- a 32-bit name length
- a 32-bit descriptor length
- a 32-bit type field
- the NUL-terminated name, length as specified in the first field
- the descriptor, length as specified in the second field
The variable sized fields are padded to 32- or 64-bits
depending on whether the file is a 32- or 64-bit ELF file.
*/
size_t align = class == ELFCLASS32 ? 4 : 8;
#define ALIGNED_LEN(len) (((len) + align - 1) & ~(align - 1))
size_t idx = 0;
while (idx < phdr->p_filesz)
{
/* XXX Handle 64-bit note section entries correctly. */
struct
{
uint32_t namesz;
uint32_t descsz;
uint32_t type;
char name[0];
} *noteentry = (__typeof (noteentry)) (notemem + idx);
if (idx + 12 > phdr->p_filesz
|| (idx + 12 + ALIGNED_LEN (noteentry->namesz)
+ ALIGNED_LEN (noteentry->descsz) > phdr->p_filesz))
/* This entry isn't completely contained in the note
section. Ignore it. */
break;
char buf[100];
char buf2[100];
printf (gettext (" %-13.*s %9" PRId32 " %s\n"),
(int) noteentry->namesz, noteentry->name,
noteentry->descsz,
ehdr->e_type == ET_CORE
? ebl_core_note_type_name (ebl, noteentry->type,
buf, sizeof (buf))
: ebl_object_note_type_name (ebl, noteentry->type,
buf2, sizeof (buf2)));
/* Filter out invalid entries. */
if (memchr (noteentry->name, '\0', noteentry->namesz) != NULL
/* XXX For now help broken Linux kernels. */
|| 1)
{
if (ehdr->e_type == ET_CORE)
ebl_core_note (ebl, noteentry->name, noteentry->type,
noteentry->descsz,
&noteentry->name[ALIGNED_LEN (noteentry->namesz)]);
else
ebl_object_note (ebl, noteentry->name, noteentry->type,
noteentry->descsz,
&noteentry->name[ALIGNED_LEN (noteentry->namesz)]);
}
/* Move to the next entry. */
idx += (12 + ALIGNED_LEN (noteentry->namesz)
+ ALIGNED_LEN (noteentry->descsz));
}
gelf_freechunk (ebl->elf, notemem);
}
}