3 * The objdump program has a new command line option -Z/--decompress which
4 changes the behaviour of the -s/--full-contents option, forcing it to
5 decompress the contents of any compressed section before they are displayed.
7 In addition when objdump is displaying sections headers (via the -h/--headers
8 command line option) it will now display "COMPRESSED" in the Flags field of
9 any compressed section.
11 * The readelf program has a new command line option --extra-sym-info which
12 extends the information displayed by the --symbols option. When enabled
13 the display will include the name of the section referenced by a symbol's
14 index field (st_shndx). In the future more information may also be displayed
15 when this option is enabled.
17 * objcopy --set-section-flags now supports "large" to set SHF_X86_64_LARGE
18 for ELF x86-64 objects.
22 * The MIPS port now supports the Sony Interactive Entertainment Allegrex
23 processor, used with the PlayStation Portable, which implements the MIPS
24 II ISA along with a single-precision FPU and a few implementation-specific
27 * Objdump's --private option can now be used on PE format files to display the
28 fields in the file header and section headers.
30 * New versioned release of libsframe: libsframe.so.1. This release introduces
31 versioned symbols with version node name LIBSFRAME_1.0. This release also
32 updates the ABI in an incompatible way: this includes removal of
33 sframe_get_funcdesc_with_addr API, change in the behavior of
34 sframe_fre_get_ra_offset and sframe_fre_get_fp_offset APIs.
36 * SFrame Version 2 is now the default (and only) format version supported by
37 gas, ld, readelf and objdump.
39 * Add command-line option, --strip-section-headers, to objcopy and strip to
40 remove ELF section header from ELF file.
42 * The RISC-V port now supports the following new standard extensions:
43 - Zicond (conditional zero instructions)
44 - Zfa (additional floating-point instructions)
45 - Zvbb, Zvbc, Zvkg, Zvkned, Zvknh[ab], Zvksed, Zvksh, Zvkn, Zvknc, Zvkng,
46 Zvks, Zvksc, Zvkg, Zvkt (vector crypto instructions)
48 * The RISC-V port now supports the following vendor-defined extensions:
51 * The LoongArch port now supports the following extensions:
52 - LSX (Loongson SIMD eXtension; 128-bit vectors)
53 - LASX (Loongson Advanced SIMD eXtension; 256-bit vectors)
54 - LVZ (Loongson Virtualization extension)
55 - LBT (Loongson Binary Translation extension)
57 * The LoongArch disassembly output received the following tweaks:
58 - Colored output is now supported.
59 - Some pseudo-instructions are now shown in place of the canonical forms,
60 where semantics are equivalent. A disassembler option '-M no-aliases' is
61 added to disable the new behavior.
62 - Signed immediates are no longer printed with their hex representation.
63 - Unrecognized instruction words are now shown with '.word'.
67 * Objdump has a new command line option --show-all-symbols which will make it
68 display all symbols that match a given address when disassembling. (Normally
69 only the first symbol that matches an address is shown).
71 * Add --enable-colored-disassembly configure time option to enable colored
72 disassembly output by default, if the output device is a terminal. Note,
73 this configure option is disabled by default.
75 * DCO signed contributions are now accepted.
77 * objcopy --decompress-debug-sections now supports zstd compressed debug
78 sections. The new option --compress-debug-sections=zstd compresses debug
81 * addr2line and objdump --dwarf now support zstd compressed debug sections.
83 * The dlltool program now accepts --deterministic-libraries and
84 --non-deterministic-libraries as command line options to control whether or
85 not it generates deterministic output libraries. If neither of these options
86 are used the default is whatever was set when the binutils were configured.
88 * readelf and objdump now have a newly added option --sframe which dumps the
93 * Add --no-weak/-W option to nm to make it ignore weak symbols.
95 * Add an option to objdump and readelf to prevent attempts to access debuginfod
96 servers when following links.
98 * objcopy --weaken, --weaken-symbol, and --weaken-symbols now make ELF
99 STB_GNU_UNIQUE symbols weak.
101 * objdump now supports syntax highlighting of disassembler output for some
102 architectures. Use the --disassembler-color=MODE command line flag, with
103 mode being either off, color, or extended-color.
107 * elfedit: Add --output-abiversion option to update ABIVERSION.
109 * Add support for the LoongArch instruction set.
111 * Tools which display symbols or strings (readelf, strings, nm, objdump)
112 have a new command line option which controls how unicode characters are
113 handled. By default they are treated as normal for the tool. Using
114 --unicode=locale will display them according to the current locale.
115 Using --unicode=hex will display them as hex byte values, whilst
116 --unicode=escape will display them as escape sequences. In addition
117 using --unicode=highlight will display them as unicode escape sequences
118 highlighted in red (if supported by the output device).
120 * readelf -r dumps RELR relative relocations now.
122 * Support for efi-app-aarch64, efi-rtdrv-aarch64 and efi-bsdrv-aarch64 has been
123 added to objcopy in order to enable UEFI development using binutils.
125 * ar: Add --thin for creating thin archives. -T is a deprecated alias without
126 diagnostics. In many ar implementations -T has a different meaning, as
127 specified by X/Open System Interface.
131 * The readelf tool has a new command line option which can be used to specify
132 how the numeric values of symbols are reported. --sym-base=0|8|10|16 tells
133 readelf to display the values in base 8, base 10 or base 16. A sym base of 0
134 represents the default action of displaying values under 10000 in base 10 and
135 values above that in base 16.
137 * Binutils now requires a C99 compiler and library to build.
139 * A new format has been added to the nm program. Specifying
140 --format=just-symbols (or just using -j) will tell the program to only
141 display symbol names and nothing else.
143 * A new command line --keep-section-symbols has been added to objcopy and
144 strip. This stops the removal of unused section symbols when the file is
145 copied. Removing these symbols saves space, but sometimes they are needed by
148 * objcopy --weaken, --weaken-symbol and --weaken-symbols now make undefined
149 symbols weak on targets that support weak symbols.
151 * Readelf and objdump can now display and use the contents of .debug_sup
154 * Readelf and objdump will now follow links to separate debug info files by
155 default. This behaviour can be stopped via the use of the new -wN or
156 --debug-dump=no-follow-links options for readelf and the -WN or
157 --dwarf=no-follow-links options for objdump. Also the old behaviour can be
158 restored by the use of the --enable-follow-debug-links=no configure time
161 The semantics of the =follow-links option have also been slightly changed.
162 When enabled, the option allows for the loading of symbol tables and string
163 tables from the separate files which can be used to enhance the information
164 displayed when dumping other sections, but it does not automatically imply
165 that information from the separate files should be displayed.
167 If other debug section display options are also enabled (eg
168 --debug-dump=info) then the contents of matching sections in both the main
169 file and the separate debuginfo file *will* be displayed. This is because in
170 most cases the debug section will only be present in one of the files.
172 If however non-debug section display options are enabled (eg --sections) then
173 the contents of matching parts of the separate debuginfo file will *not* be
174 displayed. This is because in most cases the user probably only wanted to
175 load the symbol information from the separate debuginfo file. In order to
176 change this behaviour a new command line option --process-links can be used.
177 This will allow di0pslay options to applied to both the main file and any
178 separate debuginfo files.
180 * Nm has a new command line option: --quiet. This suppresses "no symbols"
185 * Update elfedit and readelf with LAM_U48 and LAM_U57 support.
187 * Nm has a new command line option: --ifunc-chars=CHARS. This specifies a
188 string of one or two characters. The first character is used as the type
189 character when displaying global ifunc symbols. The second character, if
190 present is used when displaying local ifunc symbols.
192 In addition a new configure time option --enable-f-for-ifunc-symbols has been
193 created, which if used will change nm's default characters for ifunc symbols
194 from i (both local and global) to F (global) and f (local).
196 * The ar tool's previously unused l modifier is now used for specifying
197 dependencies of a static library. The arguments of this option
198 (or --record-libdeps long form option) will be stored verbatim in the
199 __.LIBDEP member of the archive, which the linker may read at link time.
201 * Readelf can now display the contents of LTO symbol table sections when asked
202 to do so via the --lto-syms command line option.
204 * Readelf now accepts the -C command line option to enable the demangling of
205 symbol names. In addition the --demangle=<style>, --no-demangle,
206 --recurse-limit and --no-recurse-limit options are also now availale.
208 * Add support for the SHF_GNU_RETAIN ELF section flag.
209 This flag specifies that the section should not be garbage collected by the
214 * Changed readelf's display of symbol names when wide mode is not enabled.
215 If the name is too long it will be truncated and the last five characters
216 replaced with "[...]". The old behaviour of displaying 5 more characters but
217 not indicating that truncation has happened can be restored by the use of the
218 -T or --silent-truncation options.
220 * X86 NaCl target support is removed.
222 * The readelf tool now has a -L or --lint or --enable-checks option which turns
223 on warning messages about possible problems with the file(s) being examined.
224 These checks include things like zero-sized sections, which are allowed by
225 the ELF standard but which nevertheless might be of concern if the user
226 was expecting them to actually contain something.
230 * Binutils now supports debuginfod, an HTTP server for distributing
231 ELF/DWARF debugging information as well as source code. When built with
232 debuginfod, readelf and objdump can automatically query debuginfod
233 servers for separate debug files when they otherwise cannot be found.
234 To build binutils with debuginfod, pass --with-debuginfod to configure.
235 This requires libdebuginfod, the debuginfod client library. debuginfod
236 is distributed with elfutils, starting with version 0.178. For more
237 information see https://sourceware.org/elfutils.
239 * Add --output option to the "ar" program. This option can be used to specify
240 the output directory when extracting members from an archive.
242 * Add --keep-section option to objcopy and strip. This option keeps the
243 specified section from being removed.
245 * Add visualization of jumps inside a function by drawing an ascii character
246 graph between the address and the disassembler column. Enabled via the
247 --visualize-jumps command line option for objdump. Currently supported by
248 the x86, x86_64, and ARM targets. The output looks something like this:
250 c6: | | \----------> be 00 00 00 00 mov $0x0,%esi
251 cb: | | /----> 48 8b 3d 00 00 00 00 mov 0x0(%rip),%rdi # d2 <main+0xd2>
252 d2: | | | 31 c0 xor %eax,%eax
253 d4: | | | /-- e8 00 00 00 00 callq d9 <main+0xd9>
254 d9: | | | \-> bf 02 00 00 00 mov $0x2,%edi
255 de: | +-----------|----- e8 00 00 00 00 callq e3 <main+0xe3>
256 e3: | \-----------|----> 48 89 da mov %rbx,%rdx
257 e6: | | be 00 00 00 00 mov $0x0,%esi
258 eb: | \----- eb de jmp cb <main+0xcb>
259 ed: \-------------------> 48 8b 16 mov (%rsi),%rdx
261 Additional arguments to the --visualize-jumps option add colors to the
266 * Add --source-comment[=<txt>] option to objdump which if present,
267 provides a prefix to source code lines displayed in a disassembly.
269 * Add --set-section-alignment <section-name>=<align> option to objcopy to allow
270 the changing of section alignments.
272 * Add --verilog-data-width option to objcopy for verilog targets to control
273 width of data elements in verilog hex format.
275 * Add support for the Armv8.1-M Mainline and M-profile Vector Extension (MVE)
278 * The separate debug info file options of readelf (--debug-dump=links
279 and --debug-dump=follow) and objdump (--dwarf=links and
280 --dwarf=follow-links) will now display and/or follow multiple links if
281 more than one are present in a file. (This usually happens when gcc's
282 -gsplit-dwarf option is used).
284 In addition objdump's --dwarf=follow-links now also affects its other
285 display options, so that for example, when combined with --syms it will
286 cause the symbol tables in any linked debug info files to also be
287 displayed. In addition when combined with --disassemble the --dwarf=
288 follow-links option will ensure that any symbol tables in the linked
289 files are read and used when disassembling code in the main file.
291 * Add support for dumping types encoded in the Compact Type Format
292 to objdump and readelf.
296 * The addr2line, c++filt, nm and objdump tools now have a limit on the
297 maximum amount of recursion that is allowed whilst demangling strings.
298 The value for this limit is defined by the DEMANGLE_RECRUSE_LIMIT
299 constant declared in the include/demangle.h header file. At the time
300 of writing this constant has the value of 2048.
302 The --no-recurse-limit option can be used to remove the limit, restoring
303 the behaviour of earlier versions of these tools. This may be needed in
304 order to dmangle truly complicated names, but it also leaves the tools
305 vulnerable to stack exhaustion from maliciously constructed mangled names.
307 * Objdump's --disassemble option can now take a parameter, specifying the
308 starting symbol for disassembly. Disassembly will continue from this
309 symbol up to the next symbol or the end of the function.
311 * The MIPS port now supports the Loongson 2K1000 processor which implements
312 the MIPS64r2 ISA, the Loongson-mmi ASE, Loongson-cam ASE, Loongson-ext ASE,
313 Loongson-ext2 ASE and MSA ASE instructions. Add -march=gs264e option for
314 Loongson 2K1000 processor.
316 * The MIPS port now supports the Loongson 3A2000/3A3000 processor which
317 implements the MIPS64r2 ISA, the Loongson-mmi ASE, Loongson-cam ASE,
318 Loongson-ext ASE and Loongson-ext2 ASE instructions. Add -march=gs464e
319 option for Loongson 3A2000/3A3000 processor.
321 * The MIPS port now supports the Loongson 3A1000 processor, aka Loongson3a,
322 which implements the MIPS64r2 ISA, the Loongson-mmi ASE, Loongson-cam ASE
323 and Loongson-ext ASE instructions. Add -march=gs464 option for Loongson
324 3A1000 processor, The -march=loongson3a is an alias of -march=gs464 for
327 * The size tool now has a new output format '--format=GNU' or '-G'. The
328 results are displayed in a similar manor to the default berkeley layout,
329 except read-only data is counted in the data column, not the text column.
330 Additionally the total is only included once.
334 * Add support for disassembling netronome Flow Processor (NFP) firmware files.
336 * The AArch64 port now supports showing disassembly notes which are emitted
337 when inconsistencies are found with the instruction that may result in the
338 instruction being invalid. These can be turned on with the option -M notes
341 * The AArch64 port now emits warnings when a combination of an instruction and
342 a named register could be invalid.
344 * Added O modifier to ar to display member offsets inside an archive
348 * Add --debug-dump=links option to readelf and --dwarf=links option to objdump
349 which displays the contents of any .gnu_debuglink or .gnu_debugaltlink
352 Add a --debug-dump=follow-links option to readelf and a --dwarf=follow-links
353 option to objdump which causes indirect links into separate debug info files
354 to be followed when dumping other DWARF sections.
358 * The MIPS port now supports microMIPS eXtended Physical Addressing (XPA)
359 instructions for assembly and disassembly.
361 * The MIPS port now supports the microMIPS Release 5 ISA for assembly and
364 * The MIPS port now supports the Imagination interAptiv MR2 processor,
365 which implements the MIPS32r3 ISA, the MIPS16e2 ASE as well as a couple
366 of implementation-specific regular MIPS and MIPS16e2 ASE instructions.
368 * The SPARC port now supports the SPARC M8 processor, which implements the
369 Oracle SPARC Architecture 2017.
371 * The MIPS port now supports the MIPS16e2 ASE for assembly and disassembly.
373 * Add support for ELF SHF_GNU_MBIND and PT_GNU_MBIND_XXX.
375 * Add support for the wasm32 ELF conversion of the WebAssembly file format.
377 * Add --inlines option to objdump, which extends the --line-numbers option
378 so that inlined functions will display their nesting information.
380 * Add --merge-notes options to objcopy to reduce the size of notes in
381 a binary file by merging and deleting redundant notes.
383 * Add support for locating separate debug info files using the build-id
384 method, where the separate file has a name based upon the build-id of
389 * This version of binutils fixes a problem with PowerPC VLE 16A and 16D
390 relocations which were functionally swapped, for example,
391 R_PPC_VLE_HA16A performed like R_PPC_VLE_HA16D while R_PPC_VLE_HA16D
392 performed like R_PPC_VLE_HA16A. This could have been fixed by
393 renumbering relocations, which would keep object files created by an
394 older version of gas compatible with a newer ld. However, that would
395 require an ABI update, affecting other assemblers and linkers that
396 create and process the relocations correctly. It is recommended that
397 all VLE object files be recompiled, but ld can modify the relocations
398 if --vle-reloc-fixup is passed to ld. If the new ld command-line
399 option is not used, ld will ld warn on finding relocations inconsistent
400 with the instructions being relocated.
402 * The nm program has a new command-line option (--with-version-strings)
403 which will display a symbol's version information, if any, after the
406 * The ARC port of objdump now accepts a -M option to specify the extra
407 instruction class(es) that should be disassembled.
409 * The --remove-section option for objcopy and strip now accepts section
410 patterns starting with an exclamation point to indicate a non-matching
411 section. A non-matching section is removed from the set of sections
412 matched by an earlier --remove-section pattern.
414 * The --only-section option for objcopy now accepts section patterns
415 starting with an exclamation point to indicate a non-matching section.
416 A non-matching section is removed from the set of sections matched by
417 an earlier --only-section pattern.
419 * New --remove-relocations=SECTIONPATTERN option for objcopy and strip.
420 This option can be used to remove sections containing relocations.
421 The SECTIONPATTERN is the section to which the relocations apply, not
422 the relocation section itself.
426 * Add a configure option, --enable-64-bit-archive, to force use of a
427 64-bit format when creating an archive symbol index.
429 * Add --elf-stt-common= option to objcopy for ELF targets to control
430 whether to convert common symbols to the STT_COMMON type.
434 * Add option to objcopy to insert new symbols into a file:
435 --add-symbol <name>=[<section>:]<value>[,<flags>]
437 * Add support for the ARC EM/HS, and ARC600/700 architectures.
439 * Extend objcopy --compress-debug-sections option to support
440 --compress-debug-sections=[none|zlib|zlib-gnu|zlib-gabi] for ELF
443 * Add --update-section option to objcopy.
445 * Add --output-separator option to strings.
449 * Add --data option to strings to only print strings in loadable, initialized
450 data sections. Change the default behaviour to be --all, but add a new
451 configure time option of --disable-default-strings-all to restore the old
454 * Add --include-all-whitespace to strings.
456 * Add --dump-section option to objcopy.
458 * Add support for the Andes NDS32.
462 * Objcopy now supports wildcard characters in command-line options that take
465 * Add support for Altera Nios II.
469 * Add support for the VLE extension to the PowerPC architecture.
471 * Add support for x64 Windows target of the delayed-load-library.
473 * Add support for the Renesas RL78 architecture.
477 * Add support for displaying the contents of .debug.macro sections.
479 * Add --preprocessor-arg option to windres to specify additional options
480 passed to preprocessor.
482 * Add --dwarf-start and --dwarf-end to readelf and objdump. These are used by
483 the new Emacs mode, see dwarf-mode.el.
485 * Add support for the Tilera TILEPro and TILE-Gx architectures.
489 * Add --interleave-width option to objcopy to allowing copying a range of
490 bytes from the input to the output with the --interleave option.
492 * Add support for the TMS320C6000 (TI C6X) processor family.
494 * Readelf can now display ARM unwind tables (.ARM.exidx / .ARM.extab) using
495 the -u / --unwind option.
497 * Add --dyn-syms to readelf to dump dynamic symbol table.
499 * A new tool - elfedit - has been added to directly manipulate ELF format
502 * Add to dlltool .def file feature of aliasing PE internal symbol name by
505 * Add a new command-line option -a / --addresses to addr2line to display the
506 address before function name or source filename.
508 * Add a new command-line option -p / --pretty-print to addr2line to have
509 a more human readable output.
511 * The hppa/som targets can now be compiled on any host.
515 * Add support for delay importing to dlltool. Use the --output-delaylib <file>
516 switch to create a delay-import library. The resulting app will load the dll
517 as soon as the first function is called. It will link to __delayLoadHelper2()
518 from the static delayimp library, which will import LoadLibraryA and
519 GetProcAddress from kernel32.
521 * Add a new command-line option, --insn-width=WIDTH, to objdump to specify
522 number of bytes to be displayed on a single line when disassembling
525 * Readelf can now display the relocated contents of a section as a sequence
526 of bytes via the --relocated-dump=<name|number> command-line option.
528 * The gprof program has been given a new command-line option:
529 --external-symbols-table=<filename> which reads in symbols from a specified
532 * The plugin target has been added to bfd. It can load the same shared objects
533 used by gold and uses them to provide basic support for new file formats.
535 * The verilog memory hex dump file format is now supported as an output format
538 * Add --file-alignment, --heap, --image-base, --section-alignment,
539 --stack and --subsystem command-line options to objcopy, which will
540 set PE optional header.
542 * Option --dwarf/-W of objdump is now as flexible as readelf --debug-dump/-w.
544 * --as-needed now links in a dynamic library if it satisfies undefined
545 symbols in regular objects, or in other dynamic libraries. In the
546 latter case the library is not linked if it is found in a DT_NEEDED
547 entry of one of the libraries already linked.
549 * Added --prefix=PREFIX and --prefix-strip=LEVEL switches to objdump to
550 add absolute paths for -S.
552 * Add new option --use-nul-prefixed-import-tables to dlltool to allow fall-
553 back to old import table generation with null element prefix.
555 * Added --identify-strict switch to cause --identify <implib> to
556 report an error when the import library is associated with
559 * Added --identify <implib> option to dlltool, which determines the
560 name of the DLL associated with the specified <implib>.
562 * Support for PowerPC booke64 instructions has been removed. The assembler no
563 longer accepts -mbooke32 or -mbooke64 and the disassembler no longer accepts
564 -Mbooke32 or -Mbooke64. Instead, -mbooke and -Mbooke should be used.
568 * Added -wL switch to dump decoded contents of .debug_line.
570 * Added support for "thin" archives which contain pathnames pointing to
571 object files rather than the files themselves and which contain a
572 flattened symbol index for all objects, and archives, which have been
573 added to the archive.
575 * Added -F switch to objdump to include file offsets in the disassembly.
577 * Added -c switch to readelf to allow string dumps of archive symbol index.
579 * Support for SSE5 has been added to the i386 port.
581 * Added -p switch to readelf to allow string dumps of sections.
585 * Resolved 37 coding problems in bfd including static array overruns, null
586 pointer dereferences and use of a malloc buffer after it has been freed, as
587 revealed by static analysis donated by Coverity, Inc. (http://scan.coverity.com).
589 * The binutils sources are now released under version 3 of the GNU General
592 * A new tool "windmc" has been added for some targets. This is a message
593 compiler which attempts to be compatible with the MS version.
595 * Add codepage support to the windres tool. It now supports many new
596 resource types (e.g. MANIFEST, TOOLBAR, etc). The output generation
597 for binary files is done now via bfd itself. The endianess problems
598 for different hosts are solved. Dumps of .res files can now be
599 re-compiled by windres without lossing resources or compilation errors.
600 Some problems on dialog resource translations are corrected.
602 * Add --extract-symbol command-line option to objcopy, which will
603 strip everything out of an ordinary object file or executable except
604 for its symbol table. Files containing just symbols can be useful
609 * Add "-x NAME" to readelf in addition to "-x NUMBER".
611 * Add -i and -t switches to cxxfilt. -i disables the display of implementation
612 specific extra demangling information (if any) and -t disables the demangling
615 * Add support for the "@<file>" syntax to the command lines of all tools, so
616 that extra switches can be read from <file>.
618 * Add "-W/--dwarf" to objdump to display the contents of the DWARF
621 * Add "-t/--section-details" to readelf to display section details.
622 "-N/--full-section-name" is deprecated.
624 * powerpc-linux ld now supports a variant form of PLT and GOT for the security
625 conscious. This form will automatically be chosen when ld detects that all
626 code in regular object files was generated by gcc -msecure-plt. The old PLT
627 and GOT may be forced by a new ld option, --bss-plt.
629 * Add "-i/--inlines" to addr2line to print enclosing scope information
630 for inlined function chains, back to first non-inlined function.
632 * Add "-N/--full-section-name" to readelf to display full section name.
634 * Add "-M entry:<addr>" switch to objdump to specify a function entry address
635 when disassembling VAX binaries.
637 * Add "--globalize-symbol <name>" and "--globalize-symbols <filename>" switches
638 to objcopy to convert local symbols into global symbols.
640 * gprof now allows input files to have histogram records for
641 several memory ranges, provided those ranges are disjoint.
645 * Add "-g/--section-groups" to readelf to display section groups.
647 * objcopy recognizes two new options --strip-unneeded-symbol and
648 --strip-unneeded-symbols, namely for use together with the wildcard
649 matching the original --strip-symbol/--strip-symbols provided, but
650 retaining any symbols matching but needed by relocations.
652 * readelf can now display address ranges from .debug_range sections. This
653 happens automatically when a DW_AT_range attribute is encountered. The
654 command-line switch --debug-dump=Ranges (or -wR) can also be used to display
655 the contents of the .debug_range section.
657 * nm and objdump now have a switch "--special-syms" to enable the displaying of
658 symbols which the target considers to be special. By default these symbols
659 are no longer displayed. Currently the only special symbols are the Mapping
660 symbols used by the ARM port to mark transitions between text and data and
661 between ARM and THUMB code.
663 * dlltool has a switch "--ext-prefix-alias <prefix>" to generate additional
664 import and export symbols with <preifx> prepended to them.
668 * objcopy for MIPS targets now accepts "-M no-aliases" as an option to the
669 disassembler to print the "raw" mips instruction mnemonic instead of some
670 pseudo instruction name. I.E. print "daddu" or "or" instead of "move",
671 "sll" instead of "nop", etc.
673 * objcopy and strip can now take wildcard patterns in symbol names specified on
674 the command line provided that the --wildcard switch is used to enable them.
676 * readelf can now parse archives.
678 * objdump now accepts --debugging-tags to print the debug information in a
679 format compatible with ctags tool.
681 * objcopy and strip now accept --only-keep-debug to create a file containing
682 those sections that would be stripped out by --strip-debug. The idea is that
683 this can be used in conjunction with the --add-gnu-debuglink switch to create
684 a two part program distribution - one a stripped executable and the other the
687 * objcopy now accepts --add-gnu-debuglink=<file> to insert a .gnu_debuglink
688 section into a (presumably stripped) executable. This allows the debug
689 information for the file to be held in a separate file.
691 * BFD marks the sections .comment and .note as 'n' in the BSD/POSIX
692 single-character representation. This can be checked by running nm
697 * Added --info switch to objcopy and strip.
699 * Support for Vitesse IQ2000 added by Red Hat.
701 * Added 'S' encoding to strings to allow the display of 8-bit characters.
703 * Added --prefix-symbols=<text>, --prefix-sections=<text> and
704 --prefix-alloc-sections=<text> to objcopy.
706 * readelf can handle the extensions to the DWARF2 spec used by the Unified
709 * BFD no longer declares a "boolean" type, to avoid clashes with other
710 headers that declare the same. Users of BFD should replace boolean,
711 false and true, with int, 0 and 1, or define their own boolean type.
713 * Support for IP2K added by Denis Chertykov.
717 * Support for the Fujitsu FRV architecture added by Red Hat. Models for FR400
720 Changes in version 2.12:
722 * Support for Don Knuth's MMIX, by Hans-Peter Nilsson.
724 * size: Add --totals to display summary of sizes (Berkeley format only).
726 * readelf: Add --wide option to not break section header or segment listing
727 lines to fit into 80 columns.
729 * strings: Add --encoding to display wide character strings. By Markus Kuhn.
731 * objcopy: Add --rename-section to change section names.
733 * readelf: Support added for DWARF 2.1 extensions. Support added for
734 displaying the contents of .debug.macinfo sections.
736 * New command-line switches added to objcopy to allow symbols to be kept as
737 global symbols, and also to specify files containing lists of such symbols.
740 * Support for OpenRISC by Johan Rydberg.
742 * New command-line switch to objcopy --alt-machine-code which creates a binary
743 with an alternate machine code if one is defined in the architecture
744 description. Only supported for ELF targets. By Alexandre Oliva.
746 * New command-line switch to objcopy -B (or --binary-architecture) which sets
747 the architecture of the output file to the given argument. This option only
748 makes sense, if the input target is binary. Otherwise it is ignored.
751 * Support for PDP-11 by Lars Brinkhoff.
753 Changes in binutils 2.11:
755 * Add support for ARM v5t and v5te architectures and Intel's XScale ARM
758 * Add --srec-len and --srec-forceS3 command-line switch to objcopy.
761 * Support for the MIPS32, by Anders Norlander.
763 * Support for the i860, by Jason Eckhardt.
765 * Support for CRIS (Axis Communications ETRAX series).
767 Changes in binutils 2.10:
769 * Support for 64-bit ELF on HPPA.
771 * New command-line switch to objdump --file-start-context which shows the
772 entire file contents up to the source line first encountered for a given
775 * New command-line switch to objdump -M (or --disassembler-options) which takes
776 a parameter which can then be interpreted on a per-target basis by the
777 disassembler. Used by ARM targets to select register name sets, ISA, APCS or
780 * objdump support for -mi386:intel which causes disassembly to be displayed
783 * New program: readelf. This displays the contents of ELF format files,
784 regardless of target machine.
786 * objcopy now takes --change-section-lma, --change-section-vma, and
787 --change-section-address options. The old --adjust-section-vma option is
788 equivalent to --change-section-address. The other --adjust-* options are now
789 renamed to --change-*, although --adjust-* continues to work.
791 * objcopy has a --redefine-sym option that lets you rename symbols.
793 * objcopy now takes a -j/--only-section option to copy only the specified
796 * dlltool now supports the IMPORTS command.
798 * dlltool now takes --export-all-symbols, --no-export-all-symbols,
799 --exclude-symbols, and --no-default-excludes options.
801 Changes in binutils 2.9:
803 * Added windres program, which can be used to manipulate resources in WIN32
804 files as used on Windows 95 and Windows NT.
806 * The objcopy --gap-fill and --pad-to options operate on the LMA rather than
807 the VMA of the sections.
809 * Added S modifier to ar to not build a symbol table.
811 Changes in binutils 2.8:
813 * The objdump disassembly format has been changed, and hopefully improved. Use
814 the new --prefix-addresses option to get the old format. There are also new
815 --disassemble-zeroes and --no-show-raw-insn options which affect disassembler
818 * Formats may now be specified as configuration triplets. For example,
819 objdump -b i386-pc-linux. The triplets are not passed through config.sub,
820 so they must be in canonical form.
822 * Added new addr2line program. This uses the debugging information to convert
823 an address into a file name and line number within a program.
825 * Added --change-leading-char argument to objcopy.
827 * Added --weaken argument to objcopy.
829 * objdump --dynamic-reloc now works on ELF executables and shared libraries.
831 * Added --adjust-vma option to objdump.
833 * Added -C/--demangle option to objdump.
835 * Added -p/--preserve-dates option to strip and objcopy.
837 Changes in binutils 2.7:
839 * Added --enable-shared and --enable-commonbfdlib options to configure.
841 * Added --debugging argument to objdump and objcopy.
843 * Added --defined-only argument to nm.
845 * Added --remove-leading-char argument to objcopy.
847 * The objdump --line-numbers option is now meaningful with --reloc.
849 * Added --line-numbers option to nm.
851 * Added --endian/-EB/-EL option to objdump.
853 * Added support for Alpha OpenVMS/AXP.
855 Changes in binutils 2.6:
857 * Added -N/--strip-symbol and -K/--keep-symbol arguments to strip and objcopy.
859 * Added several arguments to objcopy to provide some control over how the new
860 file is laid out in memory. Also added binary output format to BFD to permit
861 generating plain binary files.
863 * Added --start-address and --stop-address options to objdump.
865 * ar and ranlib now work on AIX. The tools are now built by default on AIX.
867 Changes in binutils 2.5:
869 * Changed objdump -dr to dump the relocs interspersed with the assembly
870 listing, for a more useful listing of relocatable files.
872 * Changed objdump -d/--disassemble to only disassemble SEC_CODE sections.
873 Added -D/--disassemble-all option to disassemble all sections.
875 * Added --size-sort option to nm.
877 * strip and objcopy should now be able to handle dynamically linked ELF
880 Changes in binutils 2.4:
882 * Support for HP-PA (by Jeff Law), i386 Mach (by David Mackenzie), RS/6000 and
883 PowerPC (except ar and ranlib; by Ian Taylor).
885 * Support for Irix 5.
887 * Programs `strip' and `objcopy' will not attempt to write dynamically linked
888 ELF output files, since BFD currently can't create them properly.
890 Changes in binutils 2.3:
892 * A new --stabs argument has been added to objdump to dump stabs sections in
895 * A new program, nlmconv, has been added. It can convert object files into
896 Novell NetWare Loadable Modules.
898 * The strings program has been added.
900 Changes in binutils 2.2:
902 * The 'copy' program has been renamed to 'objcopy', for consistency with
903 'objdump', and because 'copy' might more plausibly be used as a synonym for
906 * The new stand-alone program c++filt is a filter that converts encoded
907 (mangled) C++ assembly-level identifiers to user-level names. (Note: This
908 may get moved to the gcc distribution.)
910 * nm -o on an archive now prefixes each line with the archive name, matching
911 the output from BSD nm.
913 * ar (and ld) can now read (but not write) BSD4.4-style archives.
915 * New support for H8500, Z8000, and the Hitach SH.
917 * Dis-assembler interface changed to allow sharing with gdb.
919 * There is new Elf code, but it is not yet ready for general use.
921 * There is the beginnings of a test suite.
923 Changes in binutils 2.1:
925 * There is now support for writing ECOFF files, so ld and the other utilities
926 should work on Risc/Ultrix and Irix. Please let us know how well this works.
928 * ar now automatically creates a symbol table (a __.SYMDEF member, in the BSD
929 version), if there are any object files in the archive. So running ranlib is
930 now redundant (unless the non-standard q command is used). This is required
931 for Posix.2 conformance.
933 * The archive-reading code now reads both BSD-style and SYSV-style archives
934 independently of the selected target format. This is to encourage people to
935 switch to SYSV-format, which has a number of advantages.
937 * The strip and copy programs now have options to remove debug-symbols only
938 and/or local symbols only. They now also support long options.
941 Copyright (C) 2012-2023 Free Software Foundation, Inc.
943 Copying and distribution of this file, with or without modification,
944 are permitted in any medium without royalty provided the copyright
945 notice and this notice are preserved.