diff options
Diffstat (limited to 'src/readelf.c')
| -rw-r--r-- | src/readelf.c | 4541 |
1 files changed, 4541 insertions, 0 deletions
diff --git a/src/readelf.c b/src/readelf.c new file mode 100644 index 00000000..6129e29d --- /dev/null +++ b/src/readelf.c @@ -0,0 +1,4541 @@ +/* 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, + ¬eentry->name[ALIGNED_LEN (noteentry->namesz)]); + else + ebl_object_note (ebl, noteentry->name, noteentry->type, + noteentry->descsz, + ¬eentry->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); + } +} |