5 * Add support for disassembling netronome Flow Processor (NFP) firmware files.
7 * The AArch64 port now supports showing disassembly notes which are emitted
8 when inconsistencies are found with the instruction that may result in the
9 instruction being invalid. These can be turned on with the option -M notes
12 * The AArch64 port now emits warnings when a combination of an instruction and
13 a named register could be invalid.
15 * Added O modifier to ar to display member offsets inside an archive
19 * Add --debug-dump=links option to readelf and --dwarf=links option to objdump
20 which displays the contents of any .gnu_debuglink or .gnu_debugaltlink
23 Add a --debug-dump=follow-links option to readelf and a --dwarf=follow-links
24 option to objdump which causes indirect links into separate debug info files
25 to be followed when dumping other DWARF sections.
29 * The MIPS port now supports microMIPS eXtended Physical Addressing (XPA)
30 instructions for assembly and disassembly.
32 * The MIPS port now supports the microMIPS Release 5 ISA for assembly and
35 * The MIPS port now supports the Imagination interAptiv MR2 processor,
36 which implements the MIPS32r3 ISA, the MIPS16e2 ASE as well as a couple
37 of implementation-specific regular MIPS and MIPS16e2 ASE instructions.
39 * The SPARC port now supports the SPARC M8 processor, which implements the
40 Oracle SPARC Architecture 2017.
42 * The MIPS port now supports the MIPS16e2 ASE for assembly and disassembly.
44 * Add support for ELF SHF_GNU_MBIND and PT_GNU_MBIND_XXX.
46 * Add support for the wasm32 ELF conversion of the WebAssembly file format.
48 * Add --inlines option to objdump, which extends the --line-numbers option
49 so that inlined functions will display their nesting information.
51 * Add --merge-notes options to objcopy to reduce the size of notes in
52 a binary file by merging and deleting redundant notes.
54 * Add support for locating separate debug info files using the build-id
55 method, where the separate file has a name based upon the build-id of
60 * This version of binutils fixes a problem with PowerPC VLE 16A and 16D
61 relocations which were functionally swapped, for example,
62 R_PPC_VLE_HA16A performed like R_PPC_VLE_HA16D while R_PPC_VLE_HA16D
63 performed like R_PPC_VLE_HA16A. This could have been fixed by
64 renumbering relocations, which would keep object files created by an
65 older version of gas compatible with a newer ld. However, that would
66 require an ABI update, affecting other assemblers and linkers that
67 create and process the relocations correctly. It is recommended that
68 all VLE object files be recompiled, but ld can modify the relocations
69 if --vle-reloc-fixup is passed to ld. If the new ld command-line
70 option is not used, ld will ld warn on finding relocations inconsistent
71 with the instructions being relocated.
73 * The nm program has a new command-line option (--with-version-strings)
74 which will display a symbol's version information, if any, after the
77 * The ARC port of objdump now accepts a -M option to specify the extra
78 instruction class(es) that should be disassembled.
80 * The --remove-section option for objcopy and strip now accepts section
81 patterns starting with an exclamation point to indicate a non-matching
82 section. A non-matching section is removed from the set of sections
83 matched by an earlier --remove-section pattern.
85 * The --only-section option for objcopy now accepts section patterns
86 starting with an exclamation point to indicate a non-matching section.
87 A non-matching section is removed from the set of sections matched by
88 an earlier --only-section pattern.
90 * New --remove-relocations=SECTIONPATTERN option for objcopy and strip.
91 This option can be used to remove sections containing relocations.
92 The SECTIONPATTERN is the section to which the relocations apply, not
93 the relocation section itself.
97 * Add a configure option, --enable-64-bit-archive, to force use of a
98 64-bit format when creating an archive symbol index.
100 * Add --elf-stt-common= option to objcopy for ELF targets to control
101 whether to convert common symbols to the STT_COMMON type.
105 * Add option to objcopy to insert new symbols into a file:
106 --add-symbol <name>=[<section>:]<value>[,<flags>]
108 * Add support for the ARC EM/HS, and ARC600/700 architectures.
110 * Extend objcopy --compress-debug-sections option to support
111 --compress-debug-sections=[none|zlib|zlib-gnu|zlib-gabi] for ELF
114 * Add --update-section option to objcopy.
116 * Add --output-separator option to strings.
120 * Add --data option to strings to only print strings in loadable, initialized
121 data sections. Change the default behaviour to be --all, but add a new
122 configure time option of --disable-default-strings-all to restore the old
125 * Add --include-all-whitespace to strings.
127 * Add --dump-section option to objcopy.
129 * Add support for the Andes NDS32.
133 * Objcopy now supports wildcard characters in command-line options that take
136 * Add support for Altera Nios II.
140 * Add support for the VLE extension to the PowerPC architecture.
142 * Add support for x64 Windows target of the delayed-load-library.
144 * Add support for the Renesas RL78 architecture.
148 * Add support for displaying the contents of .debug.macro sections.
150 * Add --preprocessor-arg option to windres to specify additional options
151 passed to preprocessor.
153 * Add --dwarf-start and --dwarf-end to readelf and objdump. These are used by
154 the new Emacs mode, see dwarf-mode.el.
156 * Add support for the Tilera TILEPro and TILE-Gx architectures.
160 * Add --interleave-width option to objcopy to allowing copying a range of
161 bytes from the input to the output with the --interleave option.
163 * Add support for the TMS320C6000 (TI C6X) processor family.
165 * Readelf can now display ARM unwind tables (.ARM.exidx / .ARM.extab) using
166 the -u / --unwind option.
168 * Add --dyn-syms to readelf to dump dynamic symbol table.
170 * A new tool - elfedit - has been added to directly manipulate ELF format
173 * Add to dlltool .def file feature of aliasing PE internal symbol name by
176 * Add a new command-line option -a / --addresses to addr2line to display the
177 address before function name or source filename.
179 * Add a new command-line option -p / --pretty-print to addr2line to have
180 a more human readable output.
182 * The hppa/som targets can now be compiled on any host.
186 * Add support for delay importing to dlltool. Use the --output-delaylib <file>
187 switch to create a delay-import library. The resulting app will load the dll
188 as soon as the first function is called. It will link to __delayLoadHelper2()
189 from the static delayimp library, which will import LoadLibraryA and
190 GetProcAddress from kernel32.
192 * Add a new command-line option, --insn-width=WIDTH, to objdump to specify
193 number of bytes to be displayed on a single line when disassembling
196 * Readelf can now display the relocated contents of a section as a sequence
197 of bytes via the --relocated-dump=<name|number> command-line option.
199 * The gprof program has been given a new command-line option:
200 --external-symbols-table=<filename> which reads in symbols from a specified
203 * The plugin target has been added to bfd. It can load the same shared objects
204 used by gold and uses them to provide basic support for new file formats.
206 * The verilog memory hex dump file format is now supported as an output format
209 * Add --file-alignment, --heap, --image-base, --section-alignment,
210 --stack and --subsystem command-line options to objcopy, which will
211 set PE optional header.
213 * Option --dwarf/-W of objdump is now as flexible as readelf --debug-dump/-w.
215 * --as-needed now links in a dynamic library if it satisfies undefined
216 symbols in regular objects, or in other dynamic libraries. In the
217 latter case the library is not linked if it is found in a DT_NEEDED
218 entry of one of the libraries already linked.
220 * Added --prefix=PREFIX and --prefix-strip=LEVEL switches to objdump to
221 add absolute paths for -S.
223 * Add new option --use-nul-prefixed-import-tables to dlltool to allow fall-
224 back to old import table generation with null element prefix.
226 * Added --identify-strict switch to cause --identify <implib> to
227 report an error when the import library is associated with
230 * Added --identify <implib> option to dlltool, which determines the
231 name of the DLL associated with the specified <implib>.
233 * Support for PowerPC booke64 instructions has been removed. The assembler no
234 longer accepts -mbooke32 or -mbooke64 and the disassembler no longer accepts
235 -Mbooke32 or -Mbooke64. Instead, -mbooke and -Mbooke should be used.
239 * Added -wL switch to dump decoded contents of .debug_line.
241 * Added support for "thin" archives which contain pathnames pointing to
242 object files rather than the files themselves and which contain a
243 flattened symbol index for all objects, and archives, which have been
244 added to the archive.
246 * Added -F switch to objdump to include file offsets in the disassembly.
248 * Added -c switch to readelf to allow string dumps of archive symbol index.
250 * Support for SSE5 has been added to the i386 port.
252 * Added -p switch to readelf to allow string dumps of sections.
256 * Resolved 37 coding problems in bfd including static array overruns, null
257 pointer dereferences and use of a malloc buffer after it has been freed, as
258 revealed by static analysis donated by Coverity, Inc. (http://scan.coverity.com).
260 * The binutils sources are now released under version 3 of the GNU General
263 * A new tool "windmc" has been added for some targets. This is a message
264 compiler which attempts to be compatible with the MS version.
266 * Add codepage support to the windres tool. It now supports many new
267 resource types (e.g. MANIFEST, TOOLBAR, etc). The output generation
268 for binary files is done now via bfd itself. The endianess problems
269 for different hosts are solved. Dumps of .res files can now be
270 re-compiled by windres without lossing resources or compilation errors.
271 Some problems on dialog resource translations are corrected.
273 * Add --extract-symbol command-line option to objcopy, which will
274 strip everything out of an ordinary object file or executable except
275 for its symbol table. Files containing just symbols can be useful
280 * Add "-x NAME" to readelf in addition to "-x NUMBER".
282 * Add -i and -t switches to cxxfilt. -i disables the display of implementation
283 specific extra demangling information (if any) and -t disables the demangling
286 * Add support for the "@<file>" syntax to the command lines of all tools, so
287 that extra switches can be read from <file>.
289 * Add "-W/--dwarf" to objdump to display the contents of the DWARF
292 * Add "-t/--section-details" to readelf to display section details.
293 "-N/--full-section-name" is deprecated.
295 * powerpc-linux ld now supports a variant form of PLT and GOT for the security
296 conscious. This form will automatically be chosen when ld detects that all
297 code in regular object files was generated by gcc -msecure-plt. The old PLT
298 and GOT may be forced by a new ld option, --bss-plt.
300 * Add "-i/--inlines" to addr2line to print enclosing scope information
301 for inlined function chains, back to first non-inlined function.
303 * Add "-N/--full-section-name" to readelf to display full section name.
305 * Add "-M entry:<addr>" switch to objdump to specify a function entry address
306 when disassembling VAX binaries.
308 * Add "--globalize-symbol <name>" and "--globalize-symbols <filename>" switches
309 to objcopy to convert local symbols into global symbols.
311 * gprof now allows input files to have histogram records for
312 several memory ranges, provided those ranges are disjoint.
316 * Add "-g/--section-groups" to readelf to display section groups.
318 * objcopy recognizes two new options --strip-unneeded-symbol and
319 --strip-unneeded-symbols, namely for use together with the wildcard
320 matching the original --strip-symbol/--strip-symbols provided, but
321 retaining any symbols matching but needed by relocations.
323 * readelf can now display address ranges from .debug_range sections. This
324 happens automatically when a DW_AT_range attribute is encountered. The
325 command-line switch --debug-dump=Ranges (or -wR) can also be used to display
326 the contents of the .debug_range section.
328 * nm and objdump now have a switch "--special-syms" to enable the displaying of
329 symbols which the target considers to be special. By default these symbols
330 are no longer displayed. Currently the only special symbols are the Mapping
331 symbols used by the ARM port to mark transitions between text and data and
332 between ARM and THUMB code.
334 * dlltool has a switch "--ext-prefix-alias <prefix>" to generate additional
335 import and export symbols with <preifx> prepended to them.
339 * objcopy for MIPS targets now accepts "-M no-aliases" as an option to the
340 disassembler to print the "raw" mips instruction mnemonic instead of some
341 pseudo instruction name. I.E. print "daddu" or "or" instead of "move",
342 "sll" instead of "nop", etc.
344 * objcopy and strip can now take wildcard patterns in symbol names specified on
345 the command line provided that the --wildcard switch is used to enable them.
347 * readelf can now parse archives.
349 * objdump now accepts --debugging-tags to print the debug information in a
350 format compatible with ctags tool.
352 * objcopy and strip now accept --only-keep-debug to create a file containing
353 those sections that would be stripped out by --strip-debug. The idea is that
354 this can be used in conjunction with the --add-gnu-debuglink switch to create
355 a two part program distribution - one a stripped executable and the other the
358 * objcopy now accepts --add-gnu-debuglink=<file> to insert a .gnu_debuglink
359 section into a (presumably stripped) executable. This allows the debug
360 information for the file to be held in a separate file.
362 * BFD marks the sections .comment and .note as 'n' in the BSD/POSIX
363 single-character representation. This can be checked by running nm
368 * Added --info switch to objcopy and strip.
370 * Support for Vitesse IQ2000 added by Red Hat.
372 * Added 'S' encoding to strings to allow the display of 8-bit characters.
374 * Added --prefix-symbols=<text>, --prefix-sections=<text> and
375 --prefix-alloc-sections=<text> to objcopy.
377 * readelf can handle the extensions to the DWARF2 spec used by the Unified
380 * BFD no longer declares a "boolean" type, to avoid clashes with other
381 headers that declare the same. Users of BFD should replace boolean,
382 false and true, with int, 0 and 1, or define their own boolean type.
384 * Support for IP2K added by Denis Chertykov.
388 * Support for the Fujitsu FRV architecture added by Red Hat. Models for FR400
391 Changes in version 2.12:
393 * Support for Don Knuth's MMIX, by Hans-Peter Nilsson.
395 * size: Add --totals to display summary of sizes (Berkeley format only).
397 * readelf: Add --wide option to not break section header or segment listing
398 lines to fit into 80 columns.
400 * strings: Add --encoding to display wide character strings. By Markus Kuhn.
402 * objcopy: Add --rename-section to change section names.
404 * readelf: Support added for DWARF 2.1 extensions. Support added for
405 displaying the contents of .debug.macinfo sections.
407 * New command-line switches added to objcopy to allow symbols to be kept as
408 global symbols, and also to specify files containing lists of such symbols.
411 * Support for OpenRISC by Johan Rydberg.
413 * New command-line switch to objcopy --alt-machine-code which creates a binary
414 with an alternate machine code if one is defined in the architecture
415 description. Only supported for ELF targets. By Alexandre Oliva.
417 * New command-line switch to objcopy -B (or --binary-architecture) which sets
418 the architecture of the output file to the given argument. This option only
419 makes sense, if the input target is binary. Otherwise it is ignored.
422 * Support for PDP-11 by Lars Brinkhoff.
424 Changes in binutils 2.11:
426 * Add support for ARM v5t and v5te architectures and Intel's XScale ARM
429 * Add --srec-len and --srec-forceS3 command-line switch to objcopy.
432 * Support for the MIPS32, by Anders Norlander.
434 * Support for the i860, by Jason Eckhardt.
436 * Support for CRIS (Axis Communications ETRAX series).
438 Changes in binutils 2.10:
440 * Support for 64-bit ELF on HPPA.
442 * New command-line switch to objdump --file-start-context which shows the
443 entire file contents up to the source line first encountered for a given
446 * New command-line switch to objdump -M (or --disassembler-options) which takes
447 a parameter which can then be interpreted on a per-target basis by the
448 disassembler. Used by ARM targets to select register name sets, ISA, APCS or
451 * objdump support for -mi386:intel which causes disassembly to be displayed
454 * New program: readelf. This displays the contents of ELF format files,
455 regardless of target machine.
457 * objcopy now takes --change-section-lma, --change-section-vma, and
458 --change-section-address options. The old --adjust-section-vma option is
459 equivalent to --change-section-address. The other --adjust-* options are now
460 renamed to --change-*, although --adjust-* continues to work.
462 * objcopy has a --redefine-sym option that lets you rename symbols.
464 * objcopy now takes a -j/--only-section option to copy only the specified
467 * dlltool now supports the IMPORTS command.
469 * dlltool now takes --export-all-symbols, --no-export-all-symbols,
470 --exclude-symbols, and --no-default-excludes options.
472 Changes in binutils 2.9:
474 * Added windres program, which can be used to manipulate resources in WIN32
475 files as used on Windows 95 and Windows NT.
477 * The objcopy --gap-fill and --pad-to options operate on the LMA rather than
478 the VMA of the sections.
480 * Added S modifier to ar to not build a symbol table.
482 Changes in binutils 2.8:
484 * The objdump disassembly format has been changed, and hopefully improved. Use
485 the new --prefix-addresses option to get the old format. There are also new
486 --disassemble-zeroes and --no-show-raw-insn options which affect disassembler
489 * Formats may now be specified as configuration triplets. For example,
490 objdump -b i386-pc-linux. The triplets are not passed through config.sub,
491 so they must be in canonical form.
493 * Added new addr2line program. This uses the debugging information to convert
494 an address into a file name and line number within a program.
496 * Added --change-leading-char argument to objcopy.
498 * Added --weaken argument to objcopy.
500 * objdump --dynamic-reloc now works on ELF executables and shared libraries.
502 * Added --adjust-vma option to objdump.
504 * Added -C/--demangle option to objdump.
506 * Added -p/--preserve-dates option to strip and objcopy.
508 Changes in binutils 2.7:
510 * Added --enable-shared and --enable-commonbfdlib options to configure.
512 * Added --debugging argument to objdump and objcopy.
514 * Added --defined-only argument to nm.
516 * Added --remove-leading-char argument to objcopy.
518 * The objdump --line-numbers option is now meaningful with --reloc.
520 * Added --line-numbers option to nm.
522 * Added --endian/-EB/-EL option to objdump.
524 * Added support for Alpha OpenVMS/AXP.
526 Changes in binutils 2.6:
528 * Added -N/--strip-symbol and -K/--keep-symbol arguments to strip and objcopy.
530 * Added several arguments to objcopy to provide some control over how the new
531 file is laid out in memory. Also added binary output format to BFD to permit
532 generating plain binary files.
534 * Added --start-address and --stop-address options to objdump.
536 * ar and ranlib now work on AIX. The tools are now built by default on AIX.
538 Changes in binutils 2.5:
540 * Changed objdump -dr to dump the relocs interspersed with the assembly
541 listing, for a more useful listing of relocatable files.
543 * Changed objdump -d/--disassemble to only disassemble SEC_CODE sections.
544 Added -D/--disassemble-all option to disassemble all sections.
546 * Added --size-sort option to nm.
548 * strip and objcopy should now be able to handle dynamically linked ELF
551 Changes in binutils 2.4:
553 * Support for HP-PA (by Jeff Law), i386 Mach (by David Mackenzie), RS/6000 and
554 PowerPC (except ar and ranlib; by Ian Taylor).
556 * Support for Irix 5.
558 * Programs `strip' and `objcopy' will not attempt to write dynamically linked
559 ELF output files, since BFD currently can't create them properly.
561 Changes in binutils 2.3:
563 * A new --stabs argument has been added to objdump to dump stabs sections in
566 * A new program, nlmconv, has been added. It can convert object files into
567 Novell NetWare Loadable Modules.
569 * The strings program has been added.
571 Changes in binutils 2.2:
573 * The 'copy' program has been renamed to 'objcopy', for consistency with
574 'objdump', and because 'copy' might more plausibly be used as a synonym for
577 * The new stand-alone program c++filt is a filter that converts encoded
578 (mangled) C++ assembly-level identifiers to user-level names. (Note: This
579 may get moved to the gcc distribution.)
581 * nm -o on an archive now prefixes each line with the archive name, matching
582 the output from BSD nm.
584 * ar (and ld) can now read (but not write) BSD4.4-style archives.
586 * New support for H8500, Z8000, and the Hitach SH.
588 * Dis-assembler interface changed to allow sharing with gdb.
590 * There is new Elf code, but it is not yet ready for general use.
592 * There is the beginnings of a test suite.
594 Changes in binutils 2.1:
596 * There is now support for writing ECOFF files, so ld and the other utilities
597 should work on Risc/Ultrix and Irix. Please let us know how well this works.
599 * ar now automatically creates a symbol table (a __.SYMDEF member, in the BSD
600 version), if there are any object files in the archive. So running ranlib is
601 now redundant (unless the non-standard q command is used). This is required
602 for Posix.2 conformance.
604 * The archive-reading code now reads both BSD-style and SYSV-style archives
605 independently of the selected target format. This is to encourage people to
606 switch to SYSV-format, which has a number of advantages.
608 * The strip and copy programs now have options to remove debug-symbols only
609 and/or local symbols only. They now also support long options.
612 Copyright (C) 2012-2018 Free Software Foundation, Inc.
614 Copying and distribution of this file, with or without modification,
615 are permitted in any medium without royalty provided the copyright
616 notice and this notice are preserved.