1 Version 0.188 some time after 0.187
3 readelf: Add -D, --use-dynamic option.
5 debuginfod: Add --disable-source-scan option.
7 libdwfl: Add new function dwfl_get_debuginfod_client.
8 Add new function dwfl_frame_reg.
12 debuginfod: Support -C option for connection thread pooling.
14 debuginfod-client: Negative cache file are now zero sized instead of
17 addr2line: The -A, --absolute option, which shows file names including
18 the full compilation directory is now the default. To get the
19 old behavior use the new option --relative.
21 readelf, elflint: Recognize FDO Packaging Metadata ELF notes
23 libdw, debuginfo-client: Load libcurl lazily only when files need to
24 be fetched remotely. libcurl is now never
25 loaded when DEBUGINFOD_URLS is unset. And when
26 DEBUGINFOD_URLS is set, libcurl is only loaded
27 when the debuginfod_begin function is called.
31 debuginfod-client: Default $DEBUGINFOD_URLS is computed from drop-in files
32 /etc/debuginfod/*.urls rather than hardcoded into the
33 /etc/profile.d/debuginfod* scripts.
34 Add $DEBUGINFOD_MAXSIZE and $DEBUGINFOD_MAXTIME settings
35 for skipping large/slow transfers.
36 Add $DEBUGINFOD_RETRY for retrying aborted lookups.
38 debuginfod: Supply extra HTTP response headers, describing archive/file
39 names that satisfy the requested buildid content.
40 Support -d :memory: option for in-memory databases.
41 Protect against loops in federated server configurations.
42 Add -r option to use -I/-X regexes for grooming stale files.
43 Protect against wasted CPU from duplicate concurrent requests.
44 Limit the duration of groom ops roughly to rescan (-t) times.
45 Add --passive mode for serving from read-only database.
46 Several other performance improvements & prometheus metrics.
48 libdw: Support for the NVIDIA Cuda line map extensions.
49 DW_LNE_NVIDIA_inlined_call and DW_LNE_NVIDIA_set_function_name
50 are defined in dwarf.h. New functions dwarf_linecontext and
51 dwarf_linefunctionname
53 translations: Update Japanese translation.
57 debuginfod-client: Simplify curl handle reuse so downloads which
58 return an error are retried.
60 elfcompress: Always exit with code 0 when the operation succeeds (even
61 when nothing was done). On error the exit code is now always 1.
65 debuginfod: Use libarchive's bsdtar as the .deb-family file unpacker.
67 debuginfod-client: Client caches negative results. If a query for a
68 file failed with 404, an empty 000 permission
69 file is created in the cache. This will prevent
70 requesting the same file for the next 10 minutes.
72 Client objects now carry long-lived curl handles
73 for outgoing connections. This makes it more
74 efficient for multiple sequential queries, because
75 the TCP connections and/or TLS state info are kept
76 around awhile, avoiding O(100ms) setup latencies.
78 libdw: handle DW_FORM_indirect when reading attributes
80 translations: Update Polish translation.
84 debuginfod: New thread-busy metric and more detailed error metrics.
85 New --fdcache-mintmp and tracking of filesystem freespace.
86 New increased webapi concurrency while grooming.
88 debuginfod-client: DEBUGINFOD_SONAME macro added to debuginfod.h which
89 can be used to dlopen the libdebuginfod.so library.
90 New function debuginfod_set_verbose_fd and
91 DEBUGINFOD_VERBOSE environment variable.
93 config: profile.sh and profile.csh won't export DEBUGINFOD_URLS unless
94 configured --enable-debuginfod-urls[=URLS]
96 elflint, readelf: Recognize SHF_GNU_RETAIN.
97 Handle SHT_X86_64_UNWIND as valid relocation target.
101 backends: Support for tilegx has been removed.
103 config: New /etc/profile.d files to provide default $DEBUGINFOD_URLS.
105 debuginfod: More efficient package traversal, tolerate various errors
106 during scanning, grooming progress is more visible and
107 interruptible, more prometheus metrics.
109 debuginfod-client: Now supports compressed (kernel) ELF images.
111 libdwfl: Add ZSTD compression support.
115 libelf: elf_update now compensates (fixes up) a bad sh_addralign for
116 SHF_COMPRESSED sections.
118 libdebuginfod: configure now takes --enable-libdebuginfod=dummy or
119 --disable-libdebuginfod for bootstrapping.
120 DEBUGINFOD_URLS now accepts "scheme-free" urls
121 (guessing at what the user meant, either http:// or file://)
123 readelf, elflint: Handle aarch64 bti, pac bits in dynamic table and gnu
126 libdw, readelf: Recognize DW_CFA_AARCH64_negate_ra_state. Allows unwinding
127 on arm64 for code that is compiled for PAC (Pointer
128 Authentication Code) as long as it isn't enabled.
132 elflint: Allow SHF_EXCLUDE as generic section flag when --gnu is given.
134 libdw, readelf: Handle GCC LTO .gnu.debuglto_ prefix.
136 libdw: Use correct CU to resolve file names in dwarf_decl_file.
138 libdwfl: Handle debugaltlink in dwfl_standard_find_debuginfo.
140 size: Also obey radix printing for bsd format.
142 nm: Explicitly print weak 'V' or 'T' and common 'C' symbols.
146 debuginfod-client: When DEBUGINFOD_PROGRESS is set and the program doesn't
147 install its own debuginfod_progressfn_t show download
149 DEBUGINFOD_TIMEOUT is now defined as seconds to get at
150 least 100K, defaults to 90 seconds.
151 Default to $XDG_CACHE_HOME/debuginfod_client.
152 New functions debuginfod_set_user_data,
153 debuginfod_get_user_data, debuginfod_get_url and
154 debuginfod_add_http_header.
155 Support for file:// URLs.
157 debuginfod: Uses libarchive directly for reading rpm archives.
158 Support for indexing .deb/.ddeb archives through dpkg-deb
160 Generic archive support through -Z EXT[=CMD]. Which can be
161 used for example for arch-linux pacman files by using
162 -Z '.tar.zst=zstdcat'.
163 Better logging using User-Agent and X-Forwarded-For headers.
164 More prometheus metrics.
165 Support for eliding dots or extraneous slashes in path names.
167 debuginfod-find: Accept /path/names in place of buildid hex.
169 libelf: Handle PN_XNUM in elf_getphdrnum before shdr 0 is cached
170 Ensure zlib resource cleanup on failure.
172 libdwfl: dwfl_linux_kernel_find_elf and dwfl_linux_kernel_report_offline
173 now find and handle a compressed vmlinuz image.
175 readelf, elflint: Handle PT_GNU_PROPERTY.
177 translations: Updated Ukrainian translation.
181 debuginfod: New server, client tool and library to index and fetch
182 ELF/DWARF files addressed by build-id through HTTP.
184 doc: There are now some manual pages for functions and tools.
186 backends: The libebl libraries are no longer dynamically loaded through
187 dlopen, but are now compiled into libdw.so directly.
189 readelf: -n, --notes now takes an optional "SECTION" argument.
190 -p and -x now also handle section numbers.
191 New option --dyn-sym to show just the dynamic symbol table.
193 libcpu: Add RISC-V disassembler.
195 libdw: Abbrevs and DIEs can now be read concurrently by multiple
196 threads through the same Dwarf handle.
198 libdwfl: Will try to use debuginfod when installed as fallback to
199 retrieve ELF and DWARF debug data files by build-id.
203 elfclassify: New tool to analyze ELF objects.
205 readelf: Print DW_AT_data_member_location as decimal offset.
206 Decode DW_AT_discr_list block attributes.
208 libdw: Add DW_AT_GNU_numerator, DW_AT_GNU_denominator and DW_AT_GNU_bias.
210 libdwelf: Add dwelf_elf_e_machine_string.
211 dwelf_elf_begin now only returns NULL when there is an error
212 reading or decompressing a file. If the file is not an ELF file
213 an ELF handle of type ELF_K_NONE is returned.
215 backends: Add support for C-SKY.
219 build: Add new --enable-install-elfh option.
220 Do NOT use this for system installs (it overrides glibc elf.h).
222 backends: riscv improved core file and return value location support.
224 Fixes CVE-2019-7146, CVE-2019-7148, CVE-2019-7149, CVE-2019-7150,
225 CVE-2019-7664, CVE-2019-7665
229 readelf: Handle multiple .debug_macro sections.
230 Recognize and parse GNU Property notes, NT_VERSION notes
231 and GNU Build Attribute ELF Notes.
233 strip: Handle SHT_GROUP correctly.
234 Add strip --reloc-debug-sections-only option.
235 Handle relocations against GNU compressed sections.
237 libdwelf: New function dwelf_elf_begin.
239 libcpu: Recognize bpf jump variants BPF_JLT, BPF_JLE, BPF_JSLT and BPF_JSLE.
241 backends: RISCV handles ADD/SUB relocations. Handle SHT_X86_64_UNWIND.
243 Fixes CVE-2018-18310, CVE-2018-18520 and CVE-2018-18521.
247 libelf, libdw and all tools now handle extended shnum and shstrndx correctly.
249 elfcompress: Don't rewrite input file if no section data needs updating.
250 Try harder to keep same file mode bits (suid) on rewrite.
252 strip: Handle mixed (out of order) allocated/non-allocated sections.
254 unstrip: Handle SHT_GROUP sections.
256 backends: RISCV and M68K now have backend implementations to generate CFI based
259 Fixes CVE-2018-16062, CVE-2018-16402 and CVE-2018-16403.
263 More fixes for crashes and hangs found by afl-fuzz. In particular various
264 functions now detect and break infinite loops caused by bad DIE tree cycles.
266 readelf: Will now lookup the size and signedness of constant value types
267 to display them correctly (and not just how they were encoded).
269 libdw: New function dwarf_next_lines to read CU-less .debug_line data.
270 dwarf_begin_elf now accepts ELF files containing just .debug_line
271 or .debug_frame sections (which can be read without needing a DIE
272 tree from the .debug_info section).
273 Removed dwarf_getscn_info, which was never implemented.
275 backends: Handle BPF simple relocations.
276 The RISCV backends now handles ABI specific CFI and knows about
277 RISCV register types and names.
281 No functional changes compared to 0.171.
283 Various bug fixes in libdw and eu-readelf dealing with bad DWARF5 data.
284 Thanks to running the afl fuzzer on eu-readelf and various testcases.
286 eu-readelf -N is ~15% faster.
290 DWARF5 and split dwarf, including GNU DebugFission, are supported now.
291 Data can be read from the new DWARF sections .debug_addr, .debug_line_str,
292 .debug_loclists, .debug_str_offsets and .debug_rnglists. Plus the new
293 DWARF5 and GNU DebugFission encodings of the existing .debug sections.
294 Also in split DWARF .dwo (DWARF object) files. This support is mostly
295 handled by existing functions (dwarf_getlocation*, dwarf_getsrclines,
296 dwarf_ranges, dwarf_form*, etc.) now returning the data from the new
297 sections and data formats. But some new functions have been added
298 to more easily get information about skeleton and split compile units
299 (dwarf_get_units and dwarf_cu_info), handle new attribute data
300 (dwarf_getabbrevattr_data) and to keep references to Dwarf_Dies
301 that might come from different sections or files (dwarf_die_addr_die).
303 Not yet supported are .dwp (Dwarf Package) and .sup (Dwarf Supplementary)
304 files, the .debug_names index, the .debug_cu_index and .debug_tu_index
305 sections. Only a single .debug_info (and .debug_types) section are
308 readelf: Handle all new DWARF5 sections.
309 --debug-dump=info+ will show split unit DIEs when found.
310 --dwarf-skeleton can be used when inspecting a .dwo file.
311 Recognizes GNU locviews with --debug-dump=loc.
313 libdw: New functions dwarf_die_addr_die, dwarf_get_units,
314 dwarf_getabbrevattr_data and dwarf_cu_info.
315 libdw will now try to resolve the alt file on first use of
316 an alt attribute FORM when not set yet with dwarf_set_alt.
317 dwarf_aggregate_size() now works with multi-dimensional arrays.
319 libdwfl: Use process_vm_readv when available instead of ptrace.
321 backends: Add a RISC-V backend.
323 There were various improvements to build on Windows.
324 The sha1 and md5 implementations have been removed, they weren't used.
328 libdw: Added new DWARF5 attribute, tag, character encoding, language code,
329 calling convention, defaulted member function and macro constants
331 New functions dwarf_default_lower_bound and dwarf_line_file.
332 dwarf_peel_type now handles DWARF5 immutable, packed and shared tags.
333 dwarf_getmacros now handles DWARF5 .debug_macro sections.
335 strip: Add -R, --remove-section=SECTION and --keep-section=SECTION.
337 backends: The bpf disassembler is now always build on all platforms.
341 backends: Add support for EM_PPC64 GNU_ATTRIBUTES.
342 Frame pointer unwinding fallback support for i386, x86_64, aarch64.
344 translations: Update Polish translation.
348 http://elfutils.org/ is now hosted at http://sourceware.org/elfutils/
350 libelf: gelf_newehdr and gelf_newehdr now return void *.
352 libdw: dwarf.h corrected the DW_LANG_PLI constant name (was DW_LANG_PL1).
354 readelf: Add optional --symbols[=SECTION] argument to select section name.
358 libasm: Add eBPF disassembler for EM_BPF files.
360 backends: Add m68k and BPF backends.
364 dwelf: Add ELF/DWARF string table creation functions. dwelf_strtab_init,
365 dwelf_strtab_add, dwelf_strtab_add_len, dwelf_strtab_finalize,
366 dwelf_strent_off, dwelf_strent_str and dwelf_strtab_free.
370 config: The default program prefix for the installed tools is now eu-.
371 Use configure --program-prefix="" to not use a program prefix.
375 elfcompress: New utility to compress or decompress ELF sections.
377 readelf: Add -z,--decompress option.
379 libelf: Add elf_compress, elf_compress_gnu, elf32_getchdr, elf64_getchdr
382 libdwelf: New function dwelf_scn_gnu_compressed_size.
384 config: Add libelf and libdw pkg-config files.
386 backends: sparc support for core and live backtraces.
388 translations: Updated Polish translation.
392 strip, unstrip: Handle ELF files with merged strtab/shstrtab tables.
393 Handle missing SHF_INFO_LINK section flags.
395 libelf: Use int64_t for offsets in libelf.h instead of loff_t.
397 libdw: dwarf.h Add preliminary DWARF5 DW_LANG_Haskell.
399 libdwfl: dwfl_standard_find_debuginfo now searches any subdir of the binary
400 path under the debuginfo root when the separate debug file couldn't
401 be found by build-id.
402 dwfl_linux_proc_attach can now be called before any Dwfl_Modules
405 backends: Better sparc and sparc64 support.
407 translations: Updated Ukrainian translation.
409 Provide default-yama-scope subpackage.
413 Bug fixes only, no new features.
417 libdw: Install new header elfutils/known-dwarf.h.
418 dwarf.h Add preliminary DWARF5 constants DW_TAG_atomic_type,
419 DW_LANG_Fortran03, DW_LANG_Fortran08. dwarf_peel_type now also
420 handles DW_TAG_atomic_type.
422 addr2line: Input addresses are now always interpreted as hexadecimal
423 numbers, never as octal or decimal numbers.
424 New option -a, --addresses to print address before each entry.
425 New option -C, --demangle to show demangled symbols.
426 New option --pretty-print to print all information on one line.
428 ar: CVE-2014-9447 Directory traversal vulnerability in ar extraction.
430 backends: x32 support.
434 libdw: New function dwarf_peel_type. dwarf_aggregate_size now uses
435 dwarf_peel_type to also provide the sizes of qualified types.
436 dwarf_getmacros will now serve either of .debug_macro and
437 .debug_macinfo transparently. New interfaces
438 dwarf_getmacros_off, dwarf_macro_getsrcfiles,
439 dwarf_macro_getparamcnt, and dwarf_macro_param are available
440 for more generalized inspection of macros and their parameters.
441 dwarf.h: Add DW_AT_GNU_deleted, DW_AT_noreturn, DW_LANG_C11,
442 DW_LANG_C_plus_plus_11 and DW_LANG_C_plus_plus_14.
446 libdw: New functions dwarf_cu_getdwarf, dwarf_cu_die.
447 dwarf.h remove non-existing DW_TAG_mutable_type.
449 libdwfl: Handle LZMA .ko.xz compressed kernel modules.
451 unstrip: New option -F, --force to combining files even if some ELF headers
454 backends: Handle ARM THUMB functions. Add support for ppc64le ELFv2 abi.
458 stack: New option -d, --debugname to lookup DWARF debuginfo name for frame.
459 New option -i, --inlines to show inlined frames using DWARF debuginfo.
461 libdwelf: New libdwelf.h header for libdw.so DWARF ELF Low-level Functions.
462 New function dwelf_elf_gnu_debuglink, dwelf_dwarf_gnu_debugaltlink,
463 and dwelf_elf_gnu_build_id.
465 libdw: Support for DWZ multifile forms DW_FORM_GNU_ref_alt and
466 DW_FORM_GNU_strp_alt is now enabled by default and no longer
467 experimental. Added new functions dwarf_getalt and dwarf_setalt
468 to get or set the alternative debug file used for the alt FORMs.
469 The dwfl_linux_proc_find_elf callback will now find ELF from
470 process memory for (deleted) files if the Dwfl has process state
473 libdwfl: The dwfl_build_id_find_debuginfo and dwfl_standard_find_debuginfo
474 functions will now try to resolve and set the alternative debug file.
476 backends: Add CFI unwinding for arm. Relies on .debug_frame.
477 Add arm process initial register state compatible mode to AARCH64.
478 Add aarch64 native and core unwind support.
480 other: All separate elfutils-robustify patches have been merged.
481 CVE-2014-0172 Check overflow before calling malloc to uncompress data.
485 libdwfl: dwfl_core_file_report has new parameter executable.
486 New functions dwfl_module_getsymtab_first_global,
487 dwfl_module_getsym_info and dwfl_module_addrinfo.
488 Added unwinder with type Dwfl_Thread_Callbacks, opaque types
489 Dwfl_Thread and Dwfl_Frame and functions dwfl_attach_state,
490 dwfl_pid, dwfl_thread_dwfl, dwfl_thread_tid, dwfl_frame_thread,
491 dwfl_thread_state_registers, dwfl_thread_state_register_pc,
492 dwfl_getthread_frames, dwfl_getthreads, dwfl_thread_getframes
495 addr2line: New option -x to show the section an address was found in.
497 stack: New utility that uses the new unwinder for processes and cores.
499 backends: Unwinder support for i386, x86_64, s390, s390x, ppc and ppc64.
504 libdw: Add new functions dwarf_getlocations, dwarf_getlocation_attr
505 and dwarf_getlocation_die.
507 readelf: Show contents of NT_SIGINFO and NT_FILE core notes.
509 addr2line: Support -i, --inlines output option.
511 backends: abi_cfi hook for arm, ppc and s390.
515 lib: New macro COMPAT_VERSION_NEWPROTO.
517 libdw: Handle GNU extension opcodes in dwarf_getlocation.
519 libdwfl: Fix STB_GLOBAL over STB_WEAK preference in dwfl_module_addrsym.
520 Add minisymtab support.
521 Add parameter add_p_vaddr to dwfl_report_elf.
522 Use DT_DEBUG library search first.
524 libebl: Handle new core note types in EBL.
526 backends: Interpret NT_ARM_VFP.
527 Implement core file registers parsing for s390/s390x.
529 readelf: Add --elf-section input option to inspect an embedded ELF file.
530 Add -U, --unresolved-address-offsets output control.
531 Add --debug-dump=decodedline support.
532 Accept version 8 .gdb_index section format.
533 Adjust output formatting width.
534 When highpc is in constant form print it also as address.
535 Display raw .debug_aranges. Use libdw only for decodedaranges.
537 elflint: Add __bss_start__ to the list of allowed symbols.
539 tests: Add configure --enable-valgrind option to run all tests under valgrind.
540 Enable automake parallel-tests for make check.
542 translations: Updated Polish translation.
544 Updates for Automake 1.13.
548 libelf: elf*_xlatetomd now works for cross-endian ELF note data.
549 elf_getshdr now works consistently on non-mmaped ELF files after
550 calling elf_cntl(ELF_C_FDREAD).
551 Implement support for ar archives with 64-bit symbol table.
553 libdw: dwarf.h corrected the DW_LANG_ObjC constant name (was DW_LANG_Objc).
554 Any existing sources using the old name will have to be updated.
555 Add DW_MACRO_GNU .debug_macro type encodings constants, DW_ATE_UTF
556 and DW_OP_GNU_parameter_ref to dwarf.h.
557 Experimental support for DWZ multifile forms DW_FORM_GNU_ref_alt
558 and DW_FORM_GNU_strp_alt. Disabled by default. Use configure
559 --enable-dwz to test it.
561 readelf: Add .debug_macro parsing support.
562 Add .gdb_index version 7 parsing support.
563 Recognize DW_OP_GNU_parameter_ref.
565 backends: Add support for Tilera TILE-Gx processor.
567 translations: Updated Ukrainian translation.
571 libelf: [g]elf[32|64]_offscn() do not match SHT_NOBITS sections at OFFSET.
573 libdw: dwarf_highpc function now handles DWARF 4 DW_AT_high_pc constant form.
574 Fix bug using dwarf_next_unit to iterate over .debug_types.
576 elflint: Now accepts gold linker produced executables.
578 The license is now GPLv2/LGPLv3+ for the libraries and GPLv3+ for stand-alone
579 programs. There is now also a formal CONTRIBUTING document describing how to
584 libdw: Support reading .zdebug_* DWARF sections compressed via zlib.
586 libdwfl: Speed up dwfl_module_addrsym.
588 nm: Support C++ demangling.
590 ar: Support D modifier for "deterministic output" with no uid/gid/mtime info.
591 The U modifier is the inverse.
592 elfutils can be configured with the --enable-deterministic-archives
593 option to make the D behavior the default when U is not specified.
595 ranlib: Support -D and -U flags with same meaning.
597 readelf: Improve output of -wline. Add support for printing SDT elf notes.
598 Add printing of .gdb_index section.
599 Support for typed DWARF stack, call_site and entry_value.
601 strip: Add --reloc-debug-sections option.
602 Improved SHT_GROUP sections handling.
606 Various build and warning nits fixed for newest GCC and Autoconf.
608 libdwfl: Yet another prelink-related fix for another regression.
609 Look for Linux kernel images in files named with compression suffixes.
611 elfcmp: New flag --ignore-build-id to ignore differing build ID bits.
612 New flag -l/--verbose to print all differences.
616 libdwfl: Fix for more prelink cases with separate debug file.
618 strip: New flag --strip-sections to remove section headers entirely.
622 libdw: Fix for handling huge .debug_aranges section.
624 libdwfl: Fix for handling prelinked DSO with separate debug file.
626 findtextrel: Fix diagnostics to work with usual section ordering.
628 libebl: i386 backend fix for multi-register integer return value location.
632 libdw: Decode new DW_OP_GNU_implicit_pointer operation;
633 new function dwarf_getlocation_implicit_pointer.
635 libdwfl: New function dwfl_dwarf_line.
637 addr2line: New flag -F/--flags to print more DWARF line information details.
639 strip: -g recognizes .gdb_index as a debugging section.
643 libdw: Accept DWARF 4 format: new functions dwarf_next_unit, dwarf_offdie_types.
644 New functions dwarf_lineisa, dwarf_linediscriminator, dwarf_lineop_index.
646 libdwfl: Fixes in core-file handling, support cores from PIEs.
647 When working from build IDs, don't open a named file that mismatches.
649 readelf: Handle DWARF 4 formats.
653 libdw: Fixes in CFI handling, best possible handling of bogus CFA ops.
655 libdwfl: Ignore R_*_NONE relocs, works around old (binutils) ld -r bugs.
659 libdwfl: New function dwfl_core_file_report.
663 Fix build with --disable-dependency-tracking.
665 Fix build with most recent glibc headers.
667 libelf: More robust to bogus section headers.
669 libdw: Fix CFI decoding.
671 libdwfl: Fix address bias returned by CFI accessors.
672 Fix core file module layout identification.
674 readelf: Fix CFI decoding.
678 libelf: New function elf_getphdrnum.
679 Now support using more than 65536 program headers in a file.
681 libdw: New function dwarf_aggregate_size for computing (constant) type
682 sizes, including array_type cases with nontrivial calculation.
684 readelf: Don't give errors for missing info under -a.
685 Handle Linux "VMCOREINFO" notes under -n.
689 libdw: Various convenience functions for individual attributes now use
690 dwarf_attr_integrate to look up indirect inherited attributes.
691 Location expression handling now supports DW_OP_implicit_value.
693 libdwfl: Support automatic decompression of files in XZ format,
694 and of Linux kernel images made with bzip2 or LZMA (as well as gzip).
698 libelf: Add elf_getshdrnum alias for elf_getshnum and elf_getshdrstrndx alias
699 for elf_getshstrndx and deprecate original names. Sun screwed up
700 their implementation and asked for a solution.
702 libebl: Add support for STB_GNU_UNIQUE.
704 elflint: Add support for STB_GNU_UNIQUE.
706 readelf: Add -N option, speeds up DWARF printing without address->name lookups.
708 libdw: Add support for decoding DWARF CFI into location description form.
709 Handle some new DWARF 3 expression operations previously omitted.
710 Basic handling of some new encodings slated for DWARF 4.
714 libebl: sparc backend fixes;
715 some more arm backend support
717 libdwfl: fix dwfl_module_build_id for prelinked DSO case;
718 fixes in core file support;
719 dwfl_module_getsym interface improved for non-address symbols
721 strip: fix infinite loop on strange inputs with -f
723 addr2line: take -j/--section=NAME option for binutils compatibility
724 (same effect as '(NAME)0x123' syntax already supported)
728 libelf: Fix regression in creation of section header
730 libdwfl: Less strict behavior if DWARF reader is just used to display data
734 libcpu: Add Intel SSE4 disassembler support
736 readelf: Implement call frame information and exception handling dumping.
737 Add -e option. Enable it implicitly for -a.
739 elflint: Check PT_GNU_EH_FRAME program header entry.
741 libdwfl: Support automatic gzip/bzip2 decompression of ELF files.
745 Install <elfutils/version.h> header file for applications to use in source
746 version compatibility checks.
748 libebl: backend fixes for i386 TLS relocs; backend support for NT_386_IOPERM
750 libcpu: disassembler fixes
756 nm: bug fixes for handling corrupt input files
760 Minor fixes for unreleased 0.136 release.
764 libdwfl: bug fixes; new "segment" interfaces;
765 all the libdwfl-based tools now support --core=COREFILE option
771 strip: changed handling of ET_REL files wrt symbol tables and relocs
775 elflint: backend improvements for sparc, alpha
777 libdwfl, libelf: bug fixes
781 readelf, elflint, libebl: SHT_GNU_ATTRIBUTE section handling (readelf -A)
783 readelf: core note handling for NT_386_TLS, NT_PPC_SPE, Alpha NT_AUXV
785 libdwfl: bug fixes and optimization in relocation handling
787 elfcmp: bug fix for non-allocated section handling
789 ld: implement newer features of binutils linker.
793 libcpu: Implement x86 and x86-64 disassembler.
794 libasm: Add interface for disassembler.
796 all programs: add debugging of branch prediction.
798 libelf: new function elf_scnshndx.
802 libdw: DW_FORM_ref_addr support; dwarf_formref entry point now deprecated;
803 bug fixes for oddly-formatted DWARF
805 libdwfl: bug fixes in offline archive support, symbol table handling;
806 apply partial relocations for dwfl_module_address_section on ET_REL
808 libebl: powerpc backend support for Altivec registers
812 readelf: -p option can take an argument like -x for one section,
813 or no argument (as before) for all SHF_STRINGS sections;
814 new option --archive-index (or -c);
815 improved -n output for core files, on many machines
817 libelf: new function elf_getdata_rawchunk, replaces gelf_rawchunk;
818 new functions gelf_getnote, gelf_getauxv, gelf_update_auxv
820 readelf, elflint: handle SHT_NOTE sections without requiring phdrs
822 elflint: stricter checks on debug sections
824 libdwfl: new functions dwfl_build_id_find_elf, dwfl_build_id_find_debuginfo,
825 dwfl_module_build_id, dwfl_module_report_build_id;
826 support dynamic symbol tables found via phdrs;
827 dwfl_standard_find_debuginfo now uses build IDs when available
829 unstrip: new option --list (or -n)
831 libebl: backend improvements for sparc, alpha, powerpc
835 readelf: new options --hex-dump (or -x), --strings (or -p)
837 addr2line: new option --symbols (or -S)
843 elfcmp: new option --hash-inexact
847 libdw: new function dwarf_getsrcdirs
849 libdwfl: new functions dwfl_module_addrsym, dwfl_report_begin_add,
850 dwfl_module_address_section
858 elflint: Compare DT_GNU_HASH tests.
860 move archives into -static RPMs
862 libelf, elflint: better support for core file handling
866 libebl: sparc backend support for return value location
868 libebl, libdwfl: backend register name support extended with more info
870 libelf, libdw: bug fixes for unaligned accesses on machines that care
872 readelf, elflint: trivial bugs fixed
876 libebl: Backend build fixes, thanks to Stepan Kasal.
878 libebl: ia64 backend support for register names, return value location
880 libdwfl: Handle truncated linux kernel module section names.
882 libdwfl: Look for linux kernel "vmlinux" files with ".debug" suffix.
884 elflint: Fix checks to permit --hash-style=gnu format.
888 libebl: add function to test for relative relocation
890 elflint: fix and extend DT_RELCOUNT/DT_RELACOUNT checks
892 elflint, readelf: add support for DT_GNU_HASH
893 libelf: add elf_gnu_hash
895 elflint, readelf: add support for 64-bit SysV-style hash tables
897 libdwfl: new functions dwfl_module_getsymtab, dwfl_module_getsym.
901 libelf: bug fixes for rewriting existing files when using mmap.
903 make all installed headers usable in C++ code.
905 readelf: better output format.
907 elflint: fix tests of dynamic section content.
909 ld: Implement --as-needed, --execstack, PT_GNU_STACK. Many small patches.
911 libdw, libdwfl: handle files without aranges info.
917 dwarf.h updated for DWARF 3.0 final specification.
919 libdwfl: New function dwfl_version.
921 The license is now GPL for most files. The libelf, libebl, libdw,
922 and libdwfl libraries have additional exceptions. Add reference to
933 libdwfl: New function dwfl_module_register_names.
935 libebl: New backend hook for register names.
939 libdwfl: New function dwfl_module_return_value_location.
941 libebl: Backend improvements for several CPUs.
945 libdw: New functions dwarf_ranges, dwarf_entrypc, dwarf_diecu,
946 dwarf_entry_breakpoints. Removed Dwarf_Func type and functions
947 dwarf_func_name, dwarf_func_lowpc, dwarf_func_highpc,
948 dwarf_func_entrypc, dwarf_func_die; dwarf_getfuncs callback now uses
949 Dwarf_Die, and dwarf_func_file, dwarf_func_line, dwarf_func_col
950 replaced by dwarf_decl_file, dwarf_decl_line, dwarf_decl_column;
951 dwarf_func_inline, dwarf_func_inline_instances now take Dwarf_Die.
952 Type Dwarf_Loc renamed to Dwarf_Op; dwarf_getloclist,
953 dwarf_addrloclists renamed dwarf_getlocation, dwarf_getlocation_addr.
957 libelf: speed-ups of non-mmap reading.
959 strings: New program.
961 Implement --enable-gcov option for configure.
963 libdw: New function dwarf_getscopes_die.
967 libelf: new function elf_getaroff
969 libdw: Added dwarf_func_die, dwarf_func_inline, dwarf_func_inline_instances.
971 libdwfl: New functions dwfl_report_offline, dwfl_offline_section_address,
972 dwfl_linux_kernel_report_offline.
978 elflint: relax a bit. Allow version definitions for defined symbols against
979 DSO versions also for symbols in nobits sections. Allow .rodata section
980 to have STRINGS and MERGE flag set.
982 strip: add some more compatibility with binutils.
986 elfcmp: some more relaxation.
988 elflint: many more tests, especially regarding to symbol versioning.
990 libelf: Add elfXX_offscn and gelf_offscn.
992 libasm: asm_begin interface changes.
994 libebl: Add three new interfaces to directly access machine, class, and
995 data encoding information.
997 objdump: New program. Just the beginning.
1001 libdw: now contains all of libdwfl. The latter is not installed anymore.
1003 elfcmp: little usability tweak, name and index of differing section is printed.
1007 libelf: fix a number of problems with elf_update
1009 elfcmp: fix a few bugs. Compare gaps.
1011 Fix a few PLT problems and mudflap build issues.
1013 libebl: Don't expose Ebl structure definition in libebl.h. It's now private.
1017 libebl: Check for matching modules.
1019 elflint: Check that copy relocations only happen for OBJECT or NOTYPE symbols.
1021 elfcmp: New program.
1023 libdwfl: New library.
1027 strip: fix bug introduced in last change
1029 libdw: records returned by dwarf_getsrclines are now sorted by address
1033 readelf: improve DWARF output format
1035 strip: support Linux kernel modules
1039 libdw: Updated dwarf.h from DWARF3 spec
1040 libdw: add new functions dwarf_func_entrypc, dwarf_func_file, dwarf_func_line,
1041 dwarf_func_col, dwarf_getsrc_file
1045 addr2line: New program
1047 libdw: add new functions: dwarf_addrdie, dwarf_macro_*, dwarf_getfuncs,
1050 findtextrel: use dwarf_addrdie
1054 findtextrel: New program.
1058 libdw: Fix using libdw.h with gcc < 4 and C++ code. Compiler bug.
1062 More Makefile and spec file cleanups.
1066 Remove most gettext autoconf handling.
1070 Fix resulting problems. One actual bug found and fixed this way
1074 libebl: Fix x86-64 relocations.
1076 Add -Wunused -Wextra warnings.
1078 Some cleanups resulting from those additional warnings.
1080 Lots of Makefile cleanup.
1084 libelf: add gelf_checksum prototype to <libelf.h>
1086 libelf: fix elf*_checksum handling of NOBITS sections
1088 Finish mudflap support.
1090 Fix three bugs found by mudflap.
1092 ld: add as_needed support
1096 readelf: in section to segment mapping, indicate read-only sections.
1098 elflint: more relaxation for GNU ld
1102 Fix compiling with gcc 4.0.
1103 Some tests called elflint without appropriate LD_LIBRARY_PATH.
1107 Fix support for platforms with lib64.
1111 libebl: add ppc and ppc64 support
1113 readelf: fix minimal memory leak.
1115 Add support to compile with mudflap.
1117 Modernize configure.ac. Move scripts in config subdir.
1119 Modernize *-po directory infrastructure.
1121 libelf: Add gelf_getlib and gelf_update_lib
1123 readelf: print liblist sections
1127 Fix some minimal build problems.
1131 ibdw: tons of new functionality and bug fixes. Several interface changes.
1133 readelf: use libdw now.
1135 libdwarf: removed completely.
1139 configuration changes.
1143 libdw: fix memory handling. Implement source line handling.
1144 nm: use libdw instead of libdwarf.
1145 libelf: change to GPL from OSL1 for now.
1149 libebl: Recognize a few more section types and dynamic tags and return
1150 appropriate strings.
1154 strip: fix overwriting of symbol table in input file.
1158 libebl: Add some ia64 bits.
1162 Bug fixes for big endian and some 64-bit machines.
1166 strip: fix handling of Alpha and s390x which use incorrect hash bucket sizes.
1168 ld: tons of changes, moving towards usability.
1172 strip: update section group symbol index if the associated symbol table changed
1174 libelf: fix two problems with generating output not via mmap
1176 elflint: add probably 10-15 more tests
1177 libebl: add support for some of the new tests
1179 ld: gazillion changes
1183 elflint: deal with .rel.dyn section. Fix a problem with rela platforms.
1184 Handle PT_GNU_STACK. Change to write messages to stdout.
1186 readelf: fix a problem with version information in the symbol table output.
1188 strip: update all version symbol table entries
1194 strip: last changed caused problems when the symbol table is before the
1195 relocation section. Fixed. This fix also improved the asymptotic
1196 behavior if many symbol table sections are present.
1200 Run strip tests with the correct libelf and libebl.
1202 libelf: fix bug in verneed byte order changing code.
1206 strip: Remove unused symbol table entries. This might require updating
1207 various other sections.
1211 Fix some libelf problems with ET_REL files.
1215 More warning changes, mainly by jbj.
1217 libdw: yet more new code. dwarf_child and dwarf_sibling should now actually
1222 libdw: 10+ new functions. get-pubnames2 works now fully. Almost all the
1223 code needed for nm is in place.
1227 cleanups to compile cleanly with gcc 3.3 and -Werror.
1229 libdw: some new code.
1233 libebl: Fix last patch to recognize relocation sections. We must not
1238 libebl: .debug_ranges is a DWARF 3 debug section
1239 libebl: recognize relocation sections for debug section
1240 Patches by Jakub Jelinek.
1244 Cleanups and more SPARC support by Tom Callaway <tcallaway@redhat.com>.
1248 64-bit cleanups for the programs.
1252 libelf: and yet more fun with endian transformation at output time.
1256 libelf: more fun with endian transformation at output time. Add test for it.
1260 libelf: Two little bugs left from previous patch to handle section output
1263 libelf: add unlikely in some more places.
1267 libelf: fix output routines to handle case where section indices and
1268 ordre in the output file don't match correctly. Patch by Jakub.
1270 elflint: fix test of note section content for 64-bit platforms and files
1271 with different byte order.
1275 libebl: Fix SH_ENTSIZE_HASH definition (patch by Jakub)
1279 libelf: correct mistake in error string handling.
1281 libelf: Implement ELF_F_PERMISSIVE.
1282 strip: Implement --permissive option.
1286 strip: Implement -g option.
1288 libelf: Handle broken hash table entry sizes.
1290 libebl: New function ebl_debugscn_p. Use it where appropriate.
1294 libelf: Use correct file size for NOBITS section with ELF_F_LAYOUT set
1298 libelf: Make error handling more robust.
1299 libelf: Use TLS in error handler if configured with --enable-tls
1301 tests: input files are now distributed, not uuencoded in the shell scripts
1303 libdw: implement error handling, dwarf_get_pubnames
1307 Build (incomplete) libdw.
1319 libebl: Handle .gnu.warning.* sections correctly.
1321 size: Implement -t option.
1323 libebl: Add IA-64 support.
1324 libebl: Update SH relocations.
1325 libebl: Add Alpha support.
1326 libebl: Add Arm support.
1327 libebl: Add support for all currently known architecture to the loader.
1331 nm: Implement -S option. Correct portable output format. Implement -s option.
1333 libelf: Take offset of archive into account in elf_rand.
1337 strip: fix handling of ET_REL files.
1338 Add tests for strip.
1342 strip: respect layout of input file
1346 strip: handle files with large number of sections.
1350 libelf: quite a few bug fixes by Alex Larsson.
1352 strip: implement -f option to place stripped sections into a separate
1353 file. By Alex Larsson.
1357 strip: don't let STT_SECTION symbols keeps sections from being removed
1359 elflint: local symbols are allowed in .dynsym
1360 elflint: special case .rel.dyn a bit
1364 elflint: check types and flags of special sections defined in gABI
1366 libebl: add x86-64 support
1370 Start improvement of debug info handling in nm.
1372 libasm: implement asm_adduleb128 and asm_addsleb128 and a test for them
1376 Fix build on 64-bit platforms.
1380 nm: print file/line number also for local symbols
1382 use versions scripts not libtool's useless -export-symbols option
1386 Update to autoconf 2.54 and automake 1.7.
1388 elflint: check note sections
1390 libdwarf: a number of bug fixes
1392 readelf: print .debug_info section content
1394 dwarf.h: Update from draft 7
1400 libelf: new function to read parts of the ELF file
1402 libebl: support for note section handling
1404 readelf: dump note sections
1408 libelf: fix little new section-handling related bugs in elf_getshstrndx
1411 elflint: tests for mandatory content of dynamic section
1413 libasm: better handling of absolute symbols
1417 libasm: rewrite to store Elf_Scn* instead of indices
1419 nm: finish many-section support
1421 nm: use debug in to print file/line info in sysv format
1423 libdwarf: fix a few bugs in DIE handling
1427 libelf: major rewrite to keep Elf_Scn references valid until elf_end
1431 libasm: Add support for bss, ABS, and COM sections.
1433 libebl: ebl_section_name takes now two index arguments to distinguish
1434 between special sections and extended sections
1438 General: fix a few problem gcc 3.1 had with the code.
1440 libelf: implement {gelf,elf32,elf64}_checksum
1442 libelf: optimize DSO: fewer relocations, fewer PLTs
1446 ld: use correct section header string table index; write correct index
1448 add dependencies for *.sym files
1452 libelf: add elf_getshnum and elf_getshstrndx
1454 libebl: update section type name function
1456 elflint: tons of fixes wrt large number of sections. New tests in this area.
1457 Same amount of other bug fixes.
1459 size, strip, nm: better support for large number of sections. Including
1460 using correct section header string table
1462 libasm: correctly create data structures for large number of sections
1464 new tests asm-tst4 and asm-tst5 to check large number of sections
1466 libasm: implement section group generation
1468 elflint: more tests on section groups. Improve performance on existing
1473 ld: add undefined symbols to dynamic symbol table if --export-dynamic is
1476 ld: fix value of e_entry
1480 elflint: print section names in error messages
1482 elflint: mustn't warn about multiple DT_NULL
1484 ld: don't emit all symbols if --export-dynamic is not given
1486 ld: correct compute symbol address in output file (section index was off by 1)
1488 ld: generate correct version info in dynsym without --export-dynamic and
1493 Fix check of various e_*size entries in elflint.
1495 Handle text output in asm_newsym.
1497 Finish checks in asm-tst3.
1501 Update to autoconf 2.53, automake 1.6, gettext 0.11+.
1503 Introduce *.sym files to restrict export from DSOs.
1505 Use attribute_hidden and internal_function to optimize DSO code.
1507 Add TLS definitions in elf.h and handle them in readelf.
1509 Fix bug in verdef section generation in ld.
1511 Add initial libasm code.
1515 Implement better hash size optimization heuristic in ld. It uses a formula
1516 taking number of tests into account.
1518 Lots of small bug fixes.
1520 Improve readelf output format. Respect various sh_link/sh_info values.
1521 Correctly print versioning information for symbol tables.
1525 Implement preprocessing of linker script. Recognize -z combreloc.
1529 Implement -z ignore|record for ld.
1531 Implement creating of .gnu.version_r and .gnu.version sections. The
1532 .gnu.version does not yet contain correct info for defined and versioned
1533 symbols (means .gnu.version_d is not yet implemented).
1535 Implement gelf_update_* functions to create versioning data.
1539 Add DT_RUNPATH/DT_RPATH entries to dynamic section. Create .plt and
1540 .rel.plt sections (completely). Add support for all four PLT related
1541 dynamic section entries. Add callback function for PLT creation.
1543 More tests in elflint. Add support for very strict checking which for
1544 now flags level 2 (deprecated features) usage.
1548 Create dynamic symbol table, dynamic string table, and hash table to ld.
1550 Add hash table histogram support to readelf.
1554 more work on elflint
1556 ld now creates the dynamic section and references it. Start adding entries
1561 Start implementing elflint.
1565 Fix handling of NOBITS sections in elf_getdata.
1567 Start implementing generation of executables and DSOs in ld.
1568 Generation of program header mostly done. Address computation done.
1569 Extension of linker script syntax.
1573 Implement section group handling in readelf.
1577 Implement section groups. This involved a lot of code moving. The
1578 new code is entirely untested since gas/gcc are currently not able to
1579 create section groups. ld works fine on files without section groups.
1583 Fix problem with adding more section in elf_newscn. The section pointers
1584 for the data buffers wasn't adjusted.
1586 Fix elf_getdata with nonzero second parameter. Correctly handle creation
1587 of internal data buffer for machines without unaligned access.
1591 Start adding support to selectively add sections. Includes support for
1593 Add --gc-sections/--no-gc-sections options.
1594 Add general section merging support.
1596 Fix a bug in section group support in strip.
1598 Fix some potential problems with hash value in dynamic hash implementation.
1602 section merging works in ld.
1606 Actually create data structures from version map file and use it to hide
1609 Implement -s -s for ld.
1613 Improve relocation table output in readelf. Avoid some crashes.
1614 Finish many section handling in readelf.
1616 Finish: finish implementation of ld -r. At least some simple tests pass.
1620 Fix a number of errors in ELF_C_WRITE handling.
1622 Almost finished implementation of ld -r. The data sections are all copied.
1623 Handling of symbol tables is missing.
1627 Handle DSO and archive input files correctly if -r option is given.
1629 Gracefully deal with no phdr in new file in libelf.
1630 Fix various small error handling problems.
1631 Don't mmap file for output unless the command says so.
1633 Add code to create ELF section header table to ld finalize routines.
1637 Fix some problems with recursive handling of archives in libelf.
1639 Improve messages printed by nm.
1641 Add symbol binding name handling to libebl. Fix section name handling in
1644 readelf and nm use more libebl functions.
1646 Handle XINDEX correctly in nm and string.
1648 Add first machine ld backend library (i386).
1649 Use it. Recognize -r and --shared. Avoid using -lxxx parameters for -r.
1650 Create ELF header in output file. Change mode of output file according to
1651 output file type. Reorganize callback initialization in ld.
1655 Fix some memory leaks in libelf.
1659 Implement reading version script. Both inside linker scripts and via the
1660 --version-script command line parameter. Uses the same code.
1661 What remains to be done is to implement a data structure which allows
1662 efficient matching against the version names to decide which pattern
1665 Beginning of output generation and output writing functions.
1669 Finish implementation for DSO input file handling. Implement rpath, runpath,
1670 and LD_LIBRARY_PATH handling.
1674 make handling of e_shnum overflow in libelf standard conforming
1676 ld now actually can handle DSOs in linker scripts. Handling of DT_RUNPATH,
1677 DT_RPATH, -rpath, -rpath-link still remains to be implemented.
1679 fix handling of -L parameters. Make actual use of the default_paths element.
1681 make re-definition of symbols in and from DSO compatible with existing linker
1685 more work on assigning input sections to output sections.
1687 Add gelf_xlatetof and gelf_xlatetom which were accidentally left out.
1689 Fix memory handling of section headers.
1693 Add many-section support to ld. Add various new command line parameters.
1694 Allow pagesize to be specified in linker script or on the command line.
1695 Collect input sections in list for the output section according to the rules
1696 specified in the linker script.
1700 Fix some problems in the internal list handling which had the result
1701 that we didn't look for some of the unresolved symbols.
1703 Free some memory if we know we don't need it anymore.
1705 Optimize the list of unresolved symbols. Throw out symbols which are
1710 Got file reading correct now. The files are all read while parsing
1711 the parameters. No creating of data structures to describe the linker
1712 command line. The symbol table is built up while reading the files.
1713 DSOs are handled now. -( -) handling is optimized.
1717 Linker read linker scripts everywhere. Handles --whole-archive. Recognizes
1718 --dynamic and --static. Collects defined and undefined symbols. Recognizes
1721 libebl now defines functions to call the callbacks. Add generic name handling
1722 in these new functions. Remove the code from readelf and call the new
1727 Start of linker. Basic argument parsing, finding of input files,
1728 linker script reading.
1732 Implement dwarf_get_fde_n(), dwarf_get_abbrev(), dwarf_get_abbrev_tag(),
1733 dwarf_get_abbrev_code(), dwarf_get_abbrev_children_flag(),
1734 dwarf_get_abbrev_entry(), dwarf_get_fde_at_pc(), and tests for it.
1738 Implement dwarf_get_fde_list_eh(), dwarf_get_cie_of_fde(),
1739 dwarf_get_fde_range(), dwarf_get_cie_info(), dwarf_get_fde_instr_bytes(),
1744 Make handling of binaries in other byte order work and add tests for it.
1748 Implement dwarf_get_aranges(), dwarf_get_arange(), dwarf_get_cu_die_offset(),
1749 dwarf_get_arange_info(), and tests for them.
1753 Implement dwarf_get_global(), dwarf_globname(), dwarf_global_die_offset(),
1754 dwarf_global_cu_offset(), dwarf_global_name_offsets(), and tests for them
1758 Implemented dwarf_srclines(), dwarf_srcfiles(), dwarf_linebeginstatement(),
1759 dwarf_lineendsequence(), dwarf_lineno(), dwarf_lineaddr(), dwarf_lineoff(),
1760 dwarf_linesrc(), dwarf_lineblock(), dwarf_lineprologueend(),
1761 dwarf_lineepiloguebegin(), and tests for them.
1765 Implemented dwarf_loclist().
1769 Implemented dwarf_dieoffset(), dwarf_die_CU_offset(), dwarf_diename() and
1772 Implemented dwarf_attrlist(), dwarf_hasattr(), dwarf_attr(), dwarf_lowpc(),
1773 dwarf_highpc(), dwarf_bytesize(), dwarf_bitsize(), dwarf_bitoffset(),
1774 dwarf_srclang(), dwarf_arrayorder(), dwarf_hasform(), dwarf_whatform(),
1775 dwarf_whatattr(), dwarf_formref(), dwarf_global_formref(), dwarf_formaddr(),
1776 dwarf_formflag(), dwarf_formudata(), dwarf_formsdata(), dwarf_formblock,
1777 dwarf_formstring() and tests for them.
1781 Implemented dwarf_offdie()), dwarf_tag(), dwarf_dieoffset(),
1782 dwarf_die_CU_offset(), dwarf_diename() and tests for them.
1786 First libdwarf functions work.
1790 libelf and parts of libebl are done.