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2016-08-08Fix seg-faults when running readelf on fuzzed binaries.Nick Clifton1-4/+27
PR binutils/20440 * dwarf.c (display_debug_lines_decoded): Add checks for running off the end of the section when populating the directory table and file table. (frame_display_row): Set max_regs equal to ncols. (load_specific_debug_section): If the section is compressed, but it is not big enough to hold a compression header then warn and return 0.
2016-08-08Fix seg-fault in DWARF dumper when given a corrupt binary containing illegal ↵Nick Clifton1-17/+55
directory and file table indicies. PR binutils/20439 * dwarf.c (display_debug_lines_decoded): Check directory and file indicies before using them to access directory and file tables.
2016-06-02Fix a bug displaying the interpretation of a CFA block that just contains ↵Nick Clifton1-1/+9
DW_CFA_NOP instructions. * dwarf.c (display_debug_frames): Do not display any interpretation if the block consists solely of DW__CFA_NOPs.
2016-04-13Add init_dwarf_regnames_s390Andreas Arnez1-0/+28
Define and use DWARF register names for s390. binutils/ChangeLog: * dwarf.h (init_dwarf_regnames_s390): Declare. * dwarf.c (dwarf_regnames_s390): New. (init_dwarf_regnames_s390): New. (init_dwarf_regnames): Call it. * objdump.c (dump_dwarf): Likewise.
2016-04-04Ignore DWARF debug information with a version of 0 - assume that it is padding.Nick Clifton1-1/+6
PR 19872 bfd * dwarf2.c (parse_comp_unit): Skip warning about unrecognised version number if the version is zero. bin * dwarf.c (display_debug_aranges): Skip warning about unrecognised version number if the version is zero.
2016-03-22Fix unbounded stack usage warning inside the SAFE_BYTE_GET macro.Nick Clifton1-1/+6
PR 19851 binutils * dwarf.c (SAFE_BYTE_GET): Replace local dynamic array allocation with run time size check.
2016-01-01Copyright update for binutilsAlan Modra1-1/+1
2015-12-08Fix static analysis warning about undefined bheaviour.Nick Clifton1-1/+1
PR binutils/19310 * dwarf.c (display_debug_frames): Recode range test to avoid undefined behaviour.
2015-11-30objdump: Handle 32-bit base address in debug_ranges / debug_loc.Andrew Burgess1-11/+14
When the DWARF address size is 32-bit, but the host machine is 64-bit, objdump fails to spot base addresses specified in the .debug_ranges and .debug_loc lists. As an example, here is the output when dumping an example .debug_ranges section with the pre-patched objdump: Contents of the .debug_ranges section: Offset Begin End 00000000 ffffffff 00000004 (start > end) 00000000 00000000 00000004 00000000 ffffffff 00000008 (start > end) 00000000 00000000 00000004 00000000 <End of list> And this is what the same section looks like when dumped with the patched version of objdump: Contents of the .debug_ranges section: Offset Begin End 00000000 ffffffff 00000004 (base address) 00000000 00000004 00000008 00000000 ffffffff 00000008 (base address) 00000000 00000008 0000000c 00000000 <End of list> binutils/ChangeLog: * dwarf.c (is_max_address): New function. (display_loc_list): Remove out of date comment, use is_max_address. (display_debug_ranges): Likewise. binutils/testsuite/ChangeLog: * binutils-all/objdump.exp: Add test for .debug_ranges decode. * binutils-all/dw2-ranges.S: New file. * binutils-all/dw2-ranges.W: New file.
2015-11-09binutils: Fix left shift of negative value.Dominik Vogt1-1/+1
This patch fixes all occurences of left-shifting negative constants in C code which is undefined by the C standard. binutils/ChangeLog: * dwarf.c (read_leb128): Fix left shift of negative value.
2015-08-12Remove trailing spaces in binutilsH.J. Lu1-1/+1
2015-06-05Improves the detection of partial .debug_line sections.Nick Clifton1-8/+10
* dwarf.c (read_debug_line_header): Use reloc_at to detect incomplete .debug_line headers
2015-05-15Fix PR18374 by making readelf and objdump ignore end-of-list markers in the ↵Nick Clifton1-77/+91
.debug_loc section if there are relocations against them. PR binutils/18374 bin * dwarf.h (struct dwarf_section): Add reloc_info and num_relocs fields. (struct dwarf_section_display): Change bitfield to boolean. (reloc_at): Add prototype. * dwarf.c (display_loc_list): Ignore list terminators if there are relocs against them. (display_debug_loc): Issue a warning if there are relocs against the .debug_loc section. (display_displays): Initialise reloc_info and num_relocs fields. * objdump.c (load_specific_debug_section): Initialise reloc_info and num_relocs fields. (reloc_at): New function. * readelf.c (is_32bit_abs_reloc): Add IA64's R_IA64_DIS32LSB reloc. (reloc_at): New function. (apply_relocations): Add relocs_return and num_relocs_return parameters. Fill them in with the loaded relocs if non-NULL. (dump_section_as_bytes): Update call to apply_relocations. (load_specific_debug_section): Initialise reloc_info and num_relocs fields. tests * binutils-all/pr18374.s: New test file. * binutils-all/readelf.exp: Assemble and run the new test. * binutils-all/readelf.pr18374: Expected output from readelf.
2015-05-11Add init_dwarf_regnames_iamcuH.J. Lu1-1/+32
* dwarf.c (dwarf_regnames_iamcu): New. (init_dwarf_regnames_iamcu): Likewise. (init_dwarf_regnames): Call init_dwarf_regnames_iamcu for EM_IAMCU. * dwarf.h (init_dwarf_regnames_iamcu): New. * objdump.c (dump_dwarf): Call init_dwarf_regnames_iamcu for bfd_arch_iamcu.
2015-05-11Rename EM_486 to EM_IAMCUH.J. Lu1-1/+1
bfd/ * elfcode.h (elf_object_p): Replace EM_486 with EM_IAMCU. binutils/ * dwarf.c (init_dwarf_regnames): Replace EM_486 with EM_IAMCU. * readelf.c (guess_is_rela): Likewise. (dump_relocations): Likewise. (get_machine_name): Likewise. (get_elf_section_flags): Likewise. (process_section_headers): Likewise. (is_32bit_abs_reloc): Likewise. (is_32bit_pcrel_reloc): Likewise. include/elf/ * common.h (EM_486): Renamed to ... (EM_IAMCU): This.
2015-04-30Fix handling of relocs for the MeP target.Nick Clifton1-0/+2
bfd PR 18317 * elf32-mep.c (MEPREL): Use bfd_elf_generic_reloc instead of mep_reloc. (mep_reloc): Delete unused function. bin * readelf.c (get_machine_flags): Add description of MeP flags. tests * binutils-all/objdump.exp (cpus_expected): Add MeP CPU names.
2015-02-26Fix undefined arithmetic operations detected by -fsanitize=undefined when ↵Nick Clifton1-15/+23
running readelf on fuzzed binaries. PR binutils/17512 * dwarf.c (display_debug_loc): Pacify the undefined behaviour sanitizer by simplifying address difference calculation. (struct Frame_Chunk): Change type of cfa_offset to dwarf_vma in order to avoid arithmetic overflows. (frame_display_row): Cast cfa_offset before printing it. (display_debug_frames): Likewise. Check for an unexpected segment size. Chnage type of 'l' local to dwarf_vma and cast it back to an int when printing. (process_cu_tu_index): Tighten check for an invalid ncols value. * readelf.c (process_corefile_note_segment): Check for inote.descdata extending beyond the end of the section. (process_v850_notes): Likewise.
2015-02-13Fixes for memory access violations triggered by running readelf on fuzzed ↵Nick Clifton1-2/+15
binaries. PR binutils/17531 * dwarf.c (display_debug_aranges): Add check for an excessive ar_length value. (process_cu_tu_index): Check for a row * columns sum being too large.
2015-02-13Fix mistake in recent code to check for an unterminated leb128 number.Nick Clifton1-1/+1
* dwarf.c (read_leb128): Fix test for shift becoming too large.
2015-02-13binutils/dwarf.c white spaceAlan Modra1-305/+306
The style fix here is for num_units * sizeof * debug_information. * dwarf.c: Formatting, whitespace. (process_debug_info): Style fix.
2015-02-11Fixes for invalid memory accesses triggered by running readelf on fuzzed ↵Nick Clifton1-15/+29
binaries. PR binutils/17531 * dwarf.c (display_debug_pubnames_worker): Work around compiler bug checking address ranges. (display_debug_frames): Likewise. (display_gdb_index): Likewise. (process_cu_tu_index): Add range check on the ncols value.
2015-02-10Fix memory access violations discovered by running readelf compiled with ↵Nick Clifton1-3/+3
undefined memory access sanitization on fuzzed binaries. PR binutils/17531 * dwarf.c (display_debug_pubnames_worker): Use dwarf_vma type for offset. * readelf.c (dump_relocations): Handle printing offsets which are MIN_INT. (process_corefile_note_segment): Add range check of the namesz field.
2015-02-10Fixes for memory access violations triggered by running readelf on fuzzed ↵Nick Clifton1-2/+9
binaries. PR binutils/17531 * dwarf.c (process_debug_info): Zero the debug information array since correct initialisation cannot be relied upon. (process_cu_tu_index): Improve range checks.
2015-02-10Fix memory access violations triggered by running objdump compiled with ↵Nick Clifton1-8/+30
out-of-bounds sanitization checking. PR binutils/17512 * dwarf.c (eh_addr_size): Use an unsigned type. (size_of_encoded_value): Return an unsigned type. (read_leb128): Break if the shift becomes too big. (process_extended_line_op): Do not read the address if the length is too long. (read_cie): Warn and fail if the pointer size or segment size are too big. * dwarf.h (DWARF2_External_LineInfo): Delete unused and incorrect structure definition. (DWARF2_External_PubNames): Likewise. (DWARF2_External_CompUnit): Likewise. (DWARF2_External_ARange): Likewise. (DWARF2_Internal_LineInfo): Use dwarf_vma type for li_prologue_length. (eh_addr_size): Update prototype. * coffcode.h (styp_to_sec_flags): Use an unsigned long type to hold the flag bits. * peXXigen.c (pe_print_reloc): Use unsigned types to hold the size and number of relocs. (pe_print_debugdata): Use a 32-bit aligned buffer to store the codeview record. * versados.c (process_otr): Check the esdid value before using it to access the EDATA.
2015-02-10Recognize new DWARF5/GCC5 DW_LANG constants for Fortran 03 and Fortran 08.Mark Wielaard1-0/+2
DWARFv5 defines and GCC5 may output two new DW_LANG constants for the Fortran 2003 and Fortran 2008 standards. Handle and display both in binutils. binutils/ChangeLog: * dwarf.c (read_and_display_attr_value): Handle DW_LANG_Fortran03 and DW_LANG_Fortran08. include/ChangeLog: * dwarf2.h: Add DW_LANG_Fortran03 and DW_LANG_Fortran08. http://dwarfstd.org/ShowIssue.php?issue=141121.1
2015-02-06Fix memory access violations triggered by processing fuzzed binaries with a ↵Nick Clifton1-3/+18
32-bit version of readelf, compiled on a 64-bit host. PR binutils/17531 * dwarf.c (xcmalloc): Fail if the arguments are too big. (xcrealloc): Likewise. (xcalloc2): Likewise.
2015-02-06Fixes illegal memory accesses triggereb by running a 32-bit binary version ↵Nick Clifton1-4/+7
of objdump compiled on a 64-bit host. PR binutils/17512 * dwarf.c (display_debug_frames): Fix range checks to work on 32-bit binaries complied on a 64-bit host. * peXXigen.c (rsrc_print_resource_entries): Add range check for addresses that wrap around the address space. (rsrc_parse_entry): Likewise.
2015-02-05Don't refer to optarg in dwarf.c functionAlan Modra1-1/+1
This one is passed in optarg as its argument. PR binutils/17926 * dwarf.c (dwarf_select_sections_by_letters): Don't refer to optarg.
2015-02-04More fixes for memory access violations triggered by running readelf on ↵Nick Clifton1-10/+28
fuzzed binaries. PR binutils/17531 * dwarf.c (read_and_display_attr_value): Test for a block length being so long that it wraps around to before the start of the block. (process_debug_info): Test for section_begin wrapping around to before the start of the section. (display_gdb_index): Test for num_cus being so large that the end address wraps around to before the start of the section. (process_cu_tu_index): Test for j being so large that the section index pool wraps around to before the start of the section.
2015-02-03Fix memory access violations triggered by running readelf on fuzzed binaries.Nick Clifton1-6/+24
PR binutils/17531 * dwarf.c (process_debug_info): Add range check. (display_debug_pubnames_worker): Likewise. (display_gdb_index): Fix range check. (process_cu_tu_index): Add range check. * readelf.c (get_data): Change parameter types from size_t to bfd_size_type. Add checks for loss of accuracy when casting from bfd_size_type to size_t. (get_dynamic_data): Likewise. (process_section_groups): Limit number of error messages.
2015-01-12Properly check abbrev sizeH.J. Lu1-4/+5
abbrev_base is independent of abbrev_size. We should use abbrev_base + abbrev_size to check abbrev section size. * dwarf.c (process_debug_info): Properly check abbrev size.
2015-01-12Another fix for memory access errors trigegred by running readelf on a ↵Nick Clifton1-22/+36
corrupt binary. PR binutils/17531 * dwarf.c (display_debug_addr): Use xcalloc to allocate the debug_addr_info array. Check for an address_base that is too large.
2015-01-12More fixes for memory access errors when running readelf on fuzzed binaries.Nick Clifton1-3/+19
PR binutils/17531 * dwarf.c (process_debug_info): Check for abbrev_base being larger than the section size. (process_cu_tu_index): Use xcalloc2 to allocate the CU and TU arrays. (xcalloc2): New function. Like xcalloc, but checks for overflow. * dwarf.h (xcalloc2): Prototype.
2015-01-05More fixes for invalid memory accesses triggered by fuzzed binaries.Nick Clifton1-31/+76
PR binutils/17531 * dwarf.c (alloc_num_debug_info_entries): New variable. (process_debug_info): Set it. Use it to avoid displaying attributes for which there is no info. (display_debug_abbrev): Check that the debug_info_entry index is valid before using it. (display_loc_list_dwo): Likewise. (process_cu_tu_index): Add range check for an overlarge dw_sect value. (free_debug_memory): Reset alloc_num_debug_info_entries. * readelf.c (slurp_ia64_unwind_table): Warn if the reloc could not be indentified. (dynamic_section_mips_val): Warn if the timestamp is invalid. (print_mips_got_entry): Add a data_end parameter. Warn if a read would go beyond the end of the data, and return an error value. (process_mips_specific): Do not read options from beyond the end of the section. Correct code to display optional data at the end of an option. Warn if there are too many GOT symbols. Update calls to print_mips_got_entry, and handle error returns.
2015-01-02ChangeLog rotatation and copyright year updateAlan Modra1-1/+1
2014-12-24Reverts an "enhancement" made in a previous delta which complained ofNick Clifton1-7/+2
unprocessed augmentation data at the end of a CIE. * dwarf.c (read_cie): Revert check for unused augmentation data - it was bogus.
2014-12-22Cast size to long to warnH.J. Lu1-1/+1
* dwarf.c (read_cie): Cast size to long to warn.
2014-12-22More fixes for invalid memory accesses exposed by fuzzed binaries.Nick Clifton1-12/+58
PR binutils/17531 * dwarf.c (decode_location_expression): Check for an out of range value for a DW_OP_GNU_entry_value expression. (display_debug_lines_raw): Check for a partial .debug_line. section being encountered without a prior, full .debug.line section. (display_debug_lines_decoded): Likewise. Also check for li_line_range being zero. (display_debug_pubnames_worker): Check for an invalid pn_length field. (read_cie): Add range checks. * elfcomm.c (setup_archive): Check for a negative longnames_size.
2014-12-18Display DW_LANG_C11 as (C11).Mark Wielaard1-1/+1
* dwarf.c (read_and_display_attr_value): Change display name of DW_LANG_C11 from (ANSI C11) to (C11).
2014-12-11Fix a few moere memory access violations.Nick Clifton1-5/+15
PR binutils/17512 * dwarf.c (display_gdb_index): Add more range checks.
2014-12-11Use autoconf check for long long in binutilsAlan Modra1-11/+12
Also fix a place where %lld was wrongly used to print a dwarf_vma. * configure.ac: Check for long long and sizes of long long and long. * elfcomm.h (HOST_WIDEST_INT): Test HAVE_LONG_LONG in place of __STDC_VERSION__ and __GNUC__. * strings.c (print_strings): Likewise. * dwarf.c (DWARF_VMA_FMT, DWARF_VMA_FMT_LONG): Likewise. (read_debug_line_header): Use dwarf_vmatoa to print warning. * configure: Regenerate. * config.in: Regenerate.
2014-12-08More fixes for invalid memory accesses triggered by fuzzed binaries.Nick Clifton1-4/+66
PR binutils/17531 * dwarf.c (display_debug_frames): Check for a negative augmentation data length. (display_gdb_index): Check for invalid offsets. * elfcomm.c (process_archive_index_and_symbols): Check for an index number that overflows when multiplied by the ar index size. * readelf.c (dump_ia64_unwind): Add range checks. (slurp_ia64_unwind_table): Change to a boolean function. Add range checks. (process_version_sections): Add range checks. (get_symbol_version_string): Add check for missing section headers.
2014-12-01Properly check for an out of range row indexH.J. Lu1-1/+1
* dwarf.c (process_cu_tu_index): Properly check for an out of range row index.
2014-12-01More fixes for memory access violations exposed by fuzzed binaries.Nick Clifton1-45/+73
PR binutils/17512 * dwarf.h (struct dwarf_section): Add user_data field. * dwarf.c (frame_need_space): Check for an over large register number. (display_debug_frames): Check the return value from frame_need_space. Check for a CFA expression that is so long the start address wraps around. (debug_displays): Initialise the user_data field. * objdump.c (load_specific_debug_section): Save the BFD section pointer in the user_data field of the dwarf_section structure. (free_debug_section): Update BFD section data when freeing section contents. * readelf.c (load_specific_debug_section): Initialise the user_data field. * archive.c (do_slurp_coff_armap): Add range checks to prevent running off the end of the string table. * compress.c (bfd_get_full_section_contents): Return a NULL pointer for zero sized sections. Do not attempt to copy a buffer onto itself. * elf-attrs.c (_bfd_elf_parse_attributes): Check for an empty header. Add range checks to avoid running off the end of the section. * elf.c (bfd_elf_get_str_section): Seek before allocating so that if the seek fails, no memory is allocated. (bfd_elf_string_from_elf_section): Do not allocate a string from a non string section. It only leads to trouble later on. (_bfd_elf_print_private_bfd_data): Check for there being too little external dynamic data. (bfd_section_from_shdr): Replace assertion with a failure mode. (bfd_section_from_shdr): When walking a loaded group section use the internal structure size, not the external size. Check for the group section being empty. * elf32-i386.c (elf_i386_rtype_to_howto): Replace assertion with a failure mode. * elfcode.h (elf_slurp_reloc_table): Likewise. * reloc.c (bfd_perform_relocation): Avoid seg-fault if the howto parameter is NULL.
2014-12-01Add checks for memory access violations exposed by fuzzed archives.Nick Clifton1-0/+8
PR binutils/17531 * dwarf.c (process_cu_tu_index): Check for an out of range row index. * elfcomm.c (adjust_relative_path): Change name_len parameter to an unsigned long. Check for path length overflow. (process_archive_index_and_symbols): Check for invalid header size. (setup_archive): Add checks for invalid archives. (get_archive_member_name): Add range checks. * elfcomm.h (adjust_relative_path): Update prototyoe. * readelf.c (process_archive): Add range checks.
2014-11-27dwarf.c handle new DWARFv5 C11, C++11 and C++14 DW_LANG constants.Mark Wielaard1-0/+3
binutils/ChangeLog * dwarf.c (read_and_display_attr_value): Handle DW_LANG_C11, DW_LANG_C_plus_plus_11 and DW_LANG_C_plus_plus_14.
2014-11-26More fixes for memory access errors triggered by attemps to examine ↵Nick Clifton1-23/+68
corrupted binaries. PR binutils/17512 * dwarf.c (display_block): Do nothing if the block starts after the end of the buffer. (read_and_display_attr_value): Add range checks. (struct Frame_Chunk): Make the ncols and ra fields unsigned. (frame_need_space): Test for an ncols of zero. (read_cie): Fail if the augmentation data extends off the end of the buffer. (display_debug_frames): Add checks for read_cie failing. Add range checks. * coff-h8300.c (rtype2howto): Replace abort with returning a NULL value. * coff-h8500.c (rtype2howto): Likewise. * coff-tic30.c (rtype2howto): Likewise. * coff-z80.c (rtype2howto): Likewise. * coff-z8k.c (rtype2howto): Likewise. * coff-ia64.c (RTYPE2HOWTO): Always return a valid howto. * coff-m68k.c (m68k_rtype2howto): Return a NULL howto if none could be found. * coff-mcore.c (RTYPE2HOWTO): Add range checking. * coff-w65.c (rtype2howto): Likewise. * coff-we32k.c (RTYPE2HOWTO): Likewise. * pe-mips.c (RTYPE2HOWTO): Likewise. * coff-x86_64.c (coff_amd64_reloc): Likewise. Replace abort with an error return. * coffcode.h (coff_slurp_reloc_table): Allow the rel parameter to be unused. * coffgen.c (make_a_section_from_file): Check the length of a section name before testing to see if it is a debug section name. (coff_object_p): Zero out any uninitialised bytes in the opt header. * ecoff.c (_bfd_ecoff_slurp_symbolic_info): Test for the raw source being empty when there are values to be processed. (_bfd_ecoff_slurp_symbol_table): Add range check. * mach-o.c (bfd_mach_o_canonicalize_one_reloc): Likewise. (bfd_mach_o_mangle_sections): Move test for too many sections to before the allocation of the section table. (bfd_mach_o_read_symtab_strtab): If the read fails, free the memory and nullify the symbol pointer. * reloc.c (bfd_generic_get_relocated_section_contents): Add handling of a bfd_reloc_notsupported return value. * versados.c (EDATA): Add range checking. (get_record): Likewise. (process_otr): Check for contents being available before updating them. (versados_canonicalize_reloc): Add range check.
2014-11-21Fixes for memory access violations exposed by fuzzinf various binaries.Nick Clifton1-0/+24
PR binutils/17512 * dwarf.c (get_encoded_value): Check for an encoded size of 0. (display_debug_lines_raw): Check for an invalid line range value. (display_debug_frames): Check for corrupt augmentation data. * coffgen.c (coff_get_normalized_symtab): Check for an excessive number of auxillary entries. * ieee.c (next_byte): Convert to a function. Return FALSE if the next byte is beyond the end of the buffer. (parse_int): Test the return value of next_byte. (parse_expression): Convert to boolean. Return FALSE if the parsing failed. Test the return value of next_byte. (ieee_seek): Convert to a function. Return FALSE if the seek goes beyond the end of the buffer. (ieee_slurp_external_symbols): Test the return value of ieee_seek and next_byte. (ieee_slurp_sections): Convert to boolean. Return FALSE if the operation failed. Test the return value of ieee_seek and next_byte. (ieee_archive_p): Test the return value of ieee_seek and next_byte. (do_one): Likewise. (ieee_slurp_section_data): Likewise. (ieee_object_p): Likewise. Store the size of the buffer in the total_amt field in the header. * libieee.h (common_header_type): Add amt field. * mach-o.c (bfd_mach_o_canonicalize_one_reloc): Check that the reloc's value is within range. (bfd_mach_o_read_symtab_symbols): Nullify the symbols field if the operation fails. * pei-x86_64.c (pex64_xdata_print_uwd_codes): Replace abort with an error message. (pex64_dump_xdata): Check for buffer overflows. * versados.c (process_otr): Check that the section exists before taking its size. (versados_object_p): Make sure that enough data was read for the header to be checked. * vms-alpha.c (vms_get_remaining_object_record): Change read_so_far parameter to an unsigned int. Check that the amount read is in range.
2014-11-19Fix signedness warningJan-Benedict Glaw1-1/+1
This is the updated version using uintptr_t as Alan Modra suggested. 2014-11-18 Jan-Benedict Glaw <jbglaw@lug-owl.de> * dwarf.c (process_extended_line_op): Fix signedness warning.
2014-11-18More fixes for illegal memory accesses exposed by fuzzed binaries.Nick Clifton1-38/+124
PR binutils/17512 * peXXIgen.c (pe_print_pdata): Fail if the section's virtual size is larger than its real size. (rsrc_print_section): Fix off-by-one error checking for overflow. * pei-x86_64.c (pex64_bfd_print_pdata): Handle empty unwind sections. * dwarf.c (get_encoded_value): Warn and return if the encoded value is more than 64-bits long. (SAFE_BYTE_GET): Do not attempt to read more than 64-bits. (process_extended_line_op): Add more range checks. (decode_location_expression): Use the return value from display_block. Add more range checks. (read_debug_line_header): Add range check. (display_debug_lines_raw): Add range checks. (display_debug_frames): Silently skip multiple zero terminators. Add range checks. (process_cu_tu_index): Check for non-existant or empty sections. Use SAFE_BYTE_GET instead of byte_get.
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