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252b5132 1-*- text -*-
0bd09323 2
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3* Readelf now displays RELR relocations in full detail.
4
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5* Readelf now has a -j/--display-section option which takes the name or index
6 of a section and displays its contents according to its type. The option can
7 be used multiple times on the command line to display multiple sections.
8
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9* Base register 0 is now printed as "0" instead of "%r0" in s390 disassembly.
10
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11* When objdump or readelf are used to display the contents of a .eh_frame
12 section they will now also display the contents of the .eh_frame_hdr section,
13 if present.
14
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15* Support for the Maverick co-processor (via -mfpu=maverick) on Arm has been
16 removed. The CPU name ep9312 is still recognized, but treated as an alias
17 for arm920t.
18
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19Changes in 2.42:
20
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21* The objdump program has a new command line option -Z/--decompress which
22 changes the behaviour of the -s/--full-contents option, forcing it to
23 decompress the contents of any compressed section before they are displayed.
24
25 In addition when objdump is displaying sections headers (via the -h/--headers
26 command line option) it will now display "COMPRESSED" in the Flags field of
27 any compressed section.
28
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29* The readelf program has a new command line option --extra-sym-info which
30 extends the information displayed by the --symbols option. When enabled
31 the display will include the name of the section referenced by a symbol's
32 index field (st_shndx). In the future more information may also be displayed
33 when this option is enabled.
34
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35* objcopy --set-section-flags now supports "large" to set SHF_X86_64_LARGE
36 for ELF x86-64 objects.
37
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38* objdump --visualize-jumps is now supported on s390 architecture.
39
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40* The s390 disassembly now optionally includes the instruction description as
41 comment with the s390-specific disassembler option "insndesc":
42 - For objdump it can be enabled with "objdump -M insndesc ...".
43 - In gdb it can be enabled with "set disassembler-options insndesc".
44
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45Changes in 2.41:
46
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47* The MIPS port now supports the Sony Interactive Entertainment Allegrex
48 processor, used with the PlayStation Portable, which implements the MIPS
49 II ISA along with a single-precision FPU and a few implementation-specific
50 integer instructions.
51
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52* Objdump's --private option can now be used on PE format files to display the
53 fields in the file header and section headers.
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54
55* New versioned release of libsframe: libsframe.so.1. This release introduces
56 versioned symbols with version node name LIBSFRAME_1.0. This release also
57 updates the ABI in an incompatible way: this includes removal of
58 sframe_get_funcdesc_with_addr API, change in the behavior of
59 sframe_fre_get_ra_offset and sframe_fre_get_fp_offset APIs.
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60
61* SFrame Version 2 is now the default (and only) format version supported by
62 gas, ld, readelf and objdump.
45b8517a 63
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64* Add command-line option, --strip-section-headers, to objcopy and strip to
65 remove ELF section header from ELF file.
66
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67* The RISC-V port now supports the following new standard extensions:
68 - Zicond (conditional zero instructions)
69 - Zfa (additional floating-point instructions)
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70 - Zvbb, Zvbc, Zvkg, Zvkned, Zvknh[ab], Zvksed, Zvksh, Zvkn, Zvknc, Zvkng,
71 Zvks, Zvksc, Zvkg, Zvkt (vector crypto instructions)
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72
73* The RISC-V port now supports the following vendor-defined extensions:
74 - XVentanaCondOps
75
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76* The LoongArch port now supports the following extensions:
77 - LSX (Loongson SIMD eXtension; 128-bit vectors)
78 - LASX (Loongson Advanced SIMD eXtension; 256-bit vectors)
79 - LVZ (Loongson Virtualization extension)
80 - LBT (Loongson Binary Translation extension)
81
82* The LoongArch disassembly output received the following tweaks:
83 - Colored output is now supported.
84 - Some pseudo-instructions are now shown in place of the canonical forms,
85 where semantics are equivalent. A disassembler option '-M no-aliases' is
86 added to disable the new behavior.
87 - Signed immediates are no longer printed with their hex representation.
88 - Unrecognized instruction words are now shown with '.word'.
89
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90Changes in 2.40:
91
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92* Objdump has a new command line option --show-all-symbols which will make it
93 display all symbols that match a given address when disassembling. (Normally
94 only the first symbol that matches an address is shown).
95
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96* Add --enable-colored-disassembly configure time option to enable colored
97 disassembly output by default, if the output device is a terminal. Note,
98 this configure option is disabled by default.
99
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100* DCO signed contributions are now accepted.
101
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102* objcopy --decompress-debug-sections now supports zstd compressed debug
103 sections. The new option --compress-debug-sections=zstd compresses debug
104 sections with zstd.
105
106* addr2line and objdump --dwarf now support zstd compressed debug sections.
107
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108* The dlltool program now accepts --deterministic-libraries and
109 --non-deterministic-libraries as command line options to control whether or
110 not it generates deterministic output libraries. If neither of these options
111 are used the default is whatever was set when the binutils were configured.
112
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113* readelf and objdump now have a newly added option --sframe which dumps the
114 SFrame section.
115
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116Changes in 2.39:
117
2c3cc81e 118* Add --no-weak/-W option to nm to make it ignore weak symbols.
60391a25 119
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120* Add an option to objdump and readelf to prevent attempts to access debuginfod
121 servers when following links.
2c3cc81e 122
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123* objcopy --weaken, --weaken-symbol, and --weaken-symbols now make ELF
124 STB_GNU_UNIQUE symbols weak.
bed566bb 125
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126* objdump now supports syntax highlighting of disassembler output for some
127 architectures. Use the --disassembler-color=MODE command line flag, with
128 mode being either off, color, or extended-color.
129
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130Changes in 2.38:
131
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132* elfedit: Add --output-abiversion option to update ABIVERSION.
133
e9a0721f 134* Add support for the LoongArch instruction set.
135
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136* Tools which display symbols or strings (readelf, strings, nm, objdump)
137 have a new command line option which controls how unicode characters are
138 handled. By default they are treated as normal for the tool. Using
139 --unicode=locale will display them according to the current locale.
140 Using --unicode=hex will display them as hex byte values, whilst
141 --unicode=escape will display them as escape sequences. In addition
142 using --unicode=highlight will display them as unicode escape sequences
143 highlighted in red (if supported by the output device).
144
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145* readelf -r dumps RELR relative relocations now.
146
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147* Support for efi-app-aarch64, efi-rtdrv-aarch64 and efi-bsdrv-aarch64 has been
148 added to objcopy in order to enable UEFI development using binutils.
149
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150* ar: Add --thin for creating thin archives. -T is a deprecated alias without
151 diagnostics. In many ar implementations -T has a different meaning, as
152 specified by X/Open System Interface.
153
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154Changes in 2.37:
155
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156* The readelf tool has a new command line option which can be used to specify
157 how the numeric values of symbols are reported. --sym-base=0|8|10|16 tells
158 readelf to display the values in base 8, base 10 or base 16. A sym base of 0
159 represents the default action of displaying values under 10000 in base 10 and
160 values above that in base 16.
161
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162* Binutils now requires a C99 compiler and library to build.
163
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164* A new format has been added to the nm program. Specifying
165 --format=just-symbols (or just using -j) will tell the program to only
166 display symbol names and nothing else.
167
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168* A new command line --keep-section-symbols has been added to objcopy and
169 strip. This stops the removal of unused section symbols when the file is
170 copied. Removing these symbols saves space, but sometimes they are needed by
171 other tools.
172
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173* objcopy --weaken, --weaken-symbol and --weaken-symbols now make undefined
174 symbols weak on targets that support weak symbols.
175
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176* Readelf and objdump can now display and use the contents of .debug_sup
177 sections.
178
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179* Readelf and objdump will now follow links to separate debug info files by
180 default. This behaviour can be stopped via the use of the new -wN or
181 --debug-dump=no-follow-links options for readelf and the -WN or
182 --dwarf=no-follow-links options for objdump. Also the old behaviour can be
183 restored by the use of the --enable-follow-debug-links=no configure time
184 option.
185
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186 The semantics of the =follow-links option have also been slightly changed.
187 When enabled, the option allows for the loading of symbol tables and string
188 tables from the separate files which can be used to enhance the information
189 displayed when dumping other sections, but it does not automatically imply
190 that information from the separate files should be displayed.
191
192 If other debug section display options are also enabled (eg
193 --debug-dump=info) then the contents of matching sections in both the main
194 file and the separate debuginfo file *will* be displayed. This is because in
195 most cases the debug section will only be present in one of the files.
196
197 If however non-debug section display options are enabled (eg --sections) then
198 the contents of matching parts of the separate debuginfo file will *not* be
199 displayed. This is because in most cases the user probably only wanted to
200 load the symbol information from the separate debuginfo file. In order to
201 change this behaviour a new command line option --process-links can be used.
202 This will allow di0pslay options to applied to both the main file and any
203 separate debuginfo files.
204
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205* Nm has a new command line option: --quiet. This suppresses "no symbols"
206 diagnostic.
207
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208Changes in 2.36:
209
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210* Update elfedit and readelf with LAM_U48 and LAM_U57 support.
211
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212* Nm has a new command line option: --ifunc-chars=CHARS. This specifies a
213 string of one or two characters. The first character is used as the type
214 character when displaying global ifunc symbols. The second character, if
215 present is used when displaying local ifunc symbols.
216
217 In addition a new configure time option --enable-f-for-ifunc-symbols has been
218 created, which if used will change nm's default characters for ifunc symbols
219 from i (both local and global) to F (global) and f (local).
220
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221* The ar tool's previously unused l modifier is now used for specifying
222 dependencies of a static library. The arguments of this option
223 (or --record-libdeps long form option) will be stored verbatim in the
224 __.LIBDEP member of the archive, which the linker may read at link time.
225
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226* Readelf can now display the contents of LTO symbol table sections when asked
227 to do so via the --lto-syms command line option.
228
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229* Readelf now accepts the -C command line option to enable the demangling of
230 symbol names. In addition the --demangle=<style>, --no-demangle,
231 --recurse-limit and --no-recurse-limit options are also now availale.
232
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233* Add support for the SHF_GNU_RETAIN ELF section flag.
234 This flag specifies that the section should not be garbage collected by the
235 linker.
236
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237Changes in 2.35:
238
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239* Changed readelf's display of symbol names when wide mode is not enabled.
240 If the name is too long it will be truncated and the last five characters
241 replaced with "[...]". The old behaviour of displaying 5 more characters but
242 not indicating that truncation has happened can be restored by the use of the
243 -T or --silent-truncation options.
244
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245* X86 NaCl target support is removed.
246
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247* The readelf tool now has a -L or --lint or --enable-checks option which turns
248 on warning messages about possible problems with the file(s) being examined.
249 These checks include things like zero-sized sections, which are allowed by
250 the ELF standard but which nevertheless might be of concern if the user
251 was expecting them to actually contain something.
252
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253Changes in 2.34:
254
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255* Binutils now supports debuginfod, an HTTP server for distributing
256 ELF/DWARF debugging information as well as source code. When built with
257 debuginfod, readelf and objdump can automatically query debuginfod
258 servers for separate debug files when they otherwise cannot be found.
259 To build binutils with debuginfod, pass --with-debuginfod to configure.
260 This requires libdebuginfod, the debuginfod client library. debuginfod
261 is distributed with elfutils, starting with version 0.178. For more
262 information see https://sourceware.org/elfutils.
263
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264* Add --output option to the "ar" program. This option can be used to specify
265 the output directory when extracting members from an archive.
266
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267* Add --keep-section option to objcopy and strip. This option keeps the
268 specified section from being removed.
269
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270 * Add visualization of jumps inside a function by drawing an ascii character
271 graph between the address and the disassembler column. Enabled via the
272 --visualize-jumps command line option for objdump. Currently supported by
273 the x86, x86_64, and ARM targets. The output looks something like this:
274
275 c6: | | \----------> be 00 00 00 00 mov $0x0,%esi
276 cb: | | /----> 48 8b 3d 00 00 00 00 mov 0x0(%rip),%rdi # d2 <main+0xd2>
277 d2: | | | 31 c0 xor %eax,%eax
278 d4: | | | /-- e8 00 00 00 00 callq d9 <main+0xd9>
279 d9: | | | \-> bf 02 00 00 00 mov $0x2,%edi
280 de: | +-----------|----- e8 00 00 00 00 callq e3 <main+0xe3>
281 e3: | \-----------|----> 48 89 da mov %rbx,%rdx
282 e6: | | be 00 00 00 00 mov $0x0,%esi
283 eb: | \----- eb de jmp cb <main+0xcb>
284 ed: \-------------------> 48 8b 16 mov (%rsi),%rdx
285
286 Additional arguments to the --visualize-jumps option add colors to the
287 output.
288
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289Changes in 2.33:
290
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291* Add --source-comment[=<txt>] option to objdump which if present,
292 provides a prefix to source code lines displayed in a disassembly.
2c610e4b 293
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294* Add --set-section-alignment <section-name>=<align> option to objcopy to allow
295 the changing of section alignments.
296
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297* Add --verilog-data-width option to objcopy for verilog targets to control
298 width of data elements in verilog hex format.
299
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300* Add support for the Armv8.1-M Mainline and M-profile Vector Extension (MVE)
301 instructions.
302
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303* The separate debug info file options of readelf (--debug-dump=links
304 and --debug-dump=follow) and objdump (--dwarf=links and
305 --dwarf=follow-links) will now display and/or follow multiple links if
306 more than one are present in a file. (This usually happens when gcc's
307 -gsplit-dwarf option is used).
308
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309 In addition objdump's --dwarf=follow-links now also affects its other
310 display options, so that for example, when combined with --syms it will
311 cause the symbol tables in any linked debug info files to also be
312 displayed. In addition when combined with --disassemble the --dwarf=
313 follow-links option will ensure that any symbol tables in the linked
314 files are read and used when disassembling code in the main file.
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315
316 * Add support for dumping types encoded in the Compact Type Format
317 to objdump and readelf.
318
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319Changes in 2.32:
320
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321* The addr2line, c++filt, nm and objdump tools now have a limit on the
322 maximum amount of recursion that is allowed whilst demangling strings.
323 The value for this limit is defined by the DEMANGLE_RECRUSE_LIMIT
324 constant declared in the include/demangle.h header file. At the time
69799d67 325 of writing this constant has the value of 2048.
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326
327 The --no-recurse-limit option can be used to remove the limit, restoring
328 the behaviour of earlier versions of these tools. This may be needed in
329 order to dmangle truly complicated names, but it also leaves the tools
330 vulnerable to stack exhaustion from maliciously constructed mangled names.
331
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332* Objdump's --disassemble option can now take a parameter, specifying the
333 starting symbol for disassembly. Disassembly will continue from this
baae986a 334 symbol up to the next symbol or the end of the function.
d3def5d7 335
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336* The MIPS port now supports the Loongson 2K1000 processor which implements
337 the MIPS64r2 ISA, the Loongson-mmi ASE, Loongson-cam ASE, Loongson-ext ASE,
338 Loongson-ext2 ASE and MSA ASE instructions. Add -march=gs264e option for
339 Loongson 2K1000 processor.
340
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341* The MIPS port now supports the Loongson 3A2000/3A3000 processor which
342 implements the MIPS64r2 ISA, the Loongson-mmi ASE, Loongson-cam ASE,
343 Loongson-ext ASE and Loongson-ext2 ASE instructions. Add -march=gs464e
344 option for Loongson 3A2000/3A3000 processor.
345
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346* The MIPS port now supports the Loongson 3A1000 processor, aka Loongson3a,
347 which implements the MIPS64r2 ISA, the Loongson-mmi ASE, Loongson-cam ASE
348 and Loongson-ext ASE instructions. Add -march=gs464 option for Loongson
349 3A1000 processor, The -march=loongson3a is an alias of -march=gs464 for
350 compatibility.
351
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352* The size tool now has a new output format '--format=GNU' or '-G'. The
353 results are displayed in a similar manor to the default berkeley layout,
354 except read-only data is counted in the data column, not the text column.
355 Additionally the total is only included once.
356
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357Changes in 2.31:
358
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359* Add support for disassembling netronome Flow Processor (NFP) firmware files.
360
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361* The AArch64 port now supports showing disassembly notes which are emitted
362 when inconsistencies are found with the instruction that may result in the
363 instruction being invalid. These can be turned on with the option -M notes
364 to objdump.
365
366* The AArch64 port now emits warnings when a combination of an instruction and
367 a named register could be invalid.
368
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369* Added O modifier to ar to display member offsets inside an archive
370
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371Changes in 2.30:
372
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373* Add --debug-dump=links option to readelf and --dwarf=links option to objdump
374 which displays the contents of any .gnu_debuglink or .gnu_debugaltlink
375 sections.
376
377 Add a --debug-dump=follow-links option to readelf and a --dwarf=follow-links
378 option to objdump which causes indirect links into separate debug info files
379 to be followed when dumping other DWARF sections.
380
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381Changes in 2.29:
382
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383* The MIPS port now supports microMIPS eXtended Physical Addressing (XPA)
384 instructions for assembly and disassembly.
385
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386* The MIPS port now supports the microMIPS Release 5 ISA for assembly and
387 disassembly.
388
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389* The MIPS port now supports the Imagination interAptiv MR2 processor,
390 which implements the MIPS32r3 ISA, the MIPS16e2 ASE as well as a couple
391 of implementation-specific regular MIPS and MIPS16e2 ASE instructions.
392
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JM
393* The SPARC port now supports the SPARC M8 processor, which implements the
394 Oracle SPARC Architecture 2017.
395
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396* The MIPS port now supports the MIPS16e2 ASE for assembly and disassembly.
397
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398* Add support for ELF SHF_GNU_MBIND and PT_GNU_MBIND_XXX.
399
efdf7a02 400* Add support for the wasm32 ELF conversion of the WebAssembly file format.
f96bd6c2 401
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AK
402* Add --inlines option to objdump, which extends the --line-numbers option
403 so that inlined functions will display their nesting information.
404
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405* Add --merge-notes options to objcopy to reduce the size of notes in
406 a binary file by merging and deleting redundant notes.
407
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408* Add support for locating separate debug info files using the build-id
409 method, where the separate file has a name based upon the build-id of
410 the original file.
411
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412Changes in 2.28:
413
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414* This version of binutils fixes a problem with PowerPC VLE 16A and 16D
415 relocations which were functionally swapped, for example,
416 R_PPC_VLE_HA16A performed like R_PPC_VLE_HA16D while R_PPC_VLE_HA16D
417 performed like R_PPC_VLE_HA16A. This could have been fixed by
418 renumbering relocations, which would keep object files created by an
419 older version of gas compatible with a newer ld. However, that would
420 require an ABI update, affecting other assemblers and linkers that
421 create and process the relocations correctly. It is recommended that
422 all VLE object files be recompiled, but ld can modify the relocations
a05a5b64 423 if --vle-reloc-fixup is passed to ld. If the new ld command-line
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AM
424 option is not used, ld will ld warn on finding relocations inconsistent
425 with the instructions being relocated.
426
a05a5b64 427* The nm program has a new command-line option (--with-version-strings)
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428 which will display a symbol's version information, if any, after the
429 symbol's name.
430
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431* The ARC port of objdump now accepts a -M option to specify the extra
432 instruction class(es) that should be disassembled.
433
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AB
434* The --remove-section option for objcopy and strip now accepts section
435 patterns starting with an exclamation point to indicate a non-matching
436 section. A non-matching section is removed from the set of sections
437 matched by an earlier --remove-section pattern.
438
439* The --only-section option for objcopy now accepts section patterns
440 starting with an exclamation point to indicate a non-matching section.
441 A non-matching section is removed from the set of sections matched by
442 an earlier --only-section pattern.
443
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444* New --remove-relocations=SECTIONPATTERN option for objcopy and strip.
445 This option can be used to remove sections containing relocations.
446 The SECTIONPATTERN is the section to which the relocations apply, not
447 the relocation section itself.
448
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449Changes in 2.27:
450
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L
451* Add a configure option, --enable-64-bit-archive, to force use of a
452 64-bit format when creating an archive symbol index.
453
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454* Add --elf-stt-common= option to objcopy for ELF targets to control
455 whether to convert common symbols to the STT_COMMON type.
456
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TG
457Changes in 2.26:
458
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459* Add option to objcopy to insert new symbols into a file:
460 --add-symbol <name>=[<section>:]<value>[,<flags>]
461
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NC
462* Add support for the ARC EM/HS, and ARC600/700 architectures.
463
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464* Extend objcopy --compress-debug-sections option to support
465 --compress-debug-sections=[none|zlib|zlib-gnu|zlib-gabi] for ELF
466 targets.
467
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AB
468* Add --update-section option to objcopy.
469
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EA
470* Add --output-separator option to strings.
471
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472Changes in 2.25:
473
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474* Add --data option to strings to only print strings in loadable, initialized
475 data sections. Change the default behaviour to be --all, but add a new
476 configure time option of --disable-default-strings-all to restore the old
477 default behaviour.
478
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EA
479* Add --include-all-whitespace to strings.
480
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NC
481* Add --dump-section option to objcopy.
482
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KLC
483* Add support for the Andes NDS32.
484
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TG
485Changes in 2.24:
486
a05a5b64 487* Objcopy now supports wildcard characters in command-line options that take
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NC
488 section names.
489
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SL
490* Add support for Altera Nios II.
491
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TG
492Changes in 2.23:
493
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494* Add support for the VLE extension to the PowerPC architecture.
495
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KT
496* Add support for x64 Windows target of the delayed-load-library.
497
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498* Add support for the Renesas RL78 architecture.
499
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TG
500Changes in 2.22:
501
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502* Add support for displaying the contents of .debug.macro sections.
503
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NC
504* Add --preprocessor-arg option to windres to specify additional options
505 passed to preprocessor.
44f45767 506
fd2f0033
TT
507* Add --dwarf-start and --dwarf-end to readelf and objdump. These are used by
508 the new Emacs mode, see dwarf-mode.el.
509
69f56ae1
WL
510* Add support for the Tilera TILEPro and TILE-Gx architectures.
511
512changes in 2.21:
44f45767 513
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514* Add --interleave-width option to objcopy to allowing copying a range of
515 bytes from the input to the output with the --interleave option.
516
40b36596
JM
517* Add support for the TMS320C6000 (TI C6X) processor family.
518
0b6ae522
DJ
519* Readelf can now display ARM unwind tables (.ARM.exidx / .ARM.extab) using
520 the -u / --unwind option.
521
2c610e4b
L
522* Add --dyn-syms to readelf to dump dynamic symbol table.
523
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524* A new tool - elfedit - has been added to directly manipulate ELF format
525 binaries.
81c23f82 526
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527* Add to dlltool .def file feature of aliasing PE internal symbol name by
528 '== <ID>' option.
529
a05a5b64 530* Add a new command-line option -a / --addresses to addr2line to display the
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TG
531 address before function name or source filename.
532
a05a5b64 533* Add a new command-line option -p / --pretty-print to addr2line to have
68cdf72f
TG
534 a more human readable output.
535
75875724
TG
536* The hppa/som targets can now be compiled on any host.
537
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TG
538Changes in 2.20:
539
10e636d2
DK
540* Add support for delay importing to dlltool. Use the --output-delaylib <file>
541 switch to create a delay-import library. The resulting app will load the dll
542 as soon as the first function is called. It will link to __delayLoadHelper2()
543 from the static delayimp library, which will import LoadLibraryA and
544 GetProcAddress from kernel32.
545
a05a5b64 546* Add a new command-line option, --insn-width=WIDTH, to objdump to specify
10e636d2
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547 number of bytes to be displayed on a single line when disassembling
548 instructions.
3dcb3fcb 549
cf13d699 550* Readelf can now display the relocated contents of a section as a sequence
a05a5b64 551 of bytes via the --relocated-dump=<name|number> command-line option.
cf13d699 552
a05a5b64 553* The gprof program has been given a new command-line option:
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554 --external-symbols-table=<filename> which reads in symbols from a specified
555 file.
6e33da12 556
ce3c775b
NC
557* The plugin target has been added to bfd. It can load the same shared objects
558 used by gold and uses them to provide basic support for new file formats.
559
43cd3ced
AG
560* The verilog memory hex dump file format is now supported as an output format
561 for objcopy.
c067354b 562
92dd4511 563* Add --file-alignment, --heap, --image-base, --section-alignment,
a05a5b64 564 --stack and --subsystem command-line options to objcopy, which will
92dd4511
L
565 set PE optional header.
566
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567* Option --dwarf/-W of objdump is now as flexible as readelf --debug-dump/-w.
568
569* --as-needed now links in a dynamic library if it satisfies undefined
570 symbols in regular objects, or in other dynamic libraries. In the
571 latter case the library is not linked if it is found in a DT_NEEDED
572 entry of one of the libraries already linked.
573
0dafdf3f 574* Added --prefix=PREFIX and --prefix-strip=LEVEL switches to objdump to
28024d9d 575 add absolute paths for -S.
0dafdf3f 576
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577* Add new option --use-nul-prefixed-import-tables to dlltool to allow fall-
578 back to old import table generation with null element prefix.
579
3aade688 580* Added --identify-strict switch to cause --identify <implib> to
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581 report an error when the import library is associated with
582 multiple DLLs.
583
584* Added --identify <implib> option to dlltool, which determines the
585 name of the DLL associated with the specified <implib>.
586
2f3bb96a
BE
587* Support for PowerPC booke64 instructions has been removed. The assembler no
588 longer accepts -mbooke32 or -mbooke64 and the disassembler no longer accepts
589 -Mbooke32 or -Mbooke64. Instead, -mbooke and -Mbooke should be used.
590
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591Changes in 2.19:
592
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593* Added -wL switch to dump decoded contents of .debug_line.
594
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NC
595* Added support for "thin" archives which contain pathnames pointing to
596 object files rather than the files themselves and which contain a
597 flattened symbol index for all objects, and archives, which have been
598 added to the archive.
3aade688 599
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600* Added -F switch to objdump to include file offsets in the disassembly.
601
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602* Added -c switch to readelf to allow string dumps of archive symbol index.
603
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MM
604* Support for SSE5 has been added to the i386 port.
605
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606* Added -p switch to readelf to allow string dumps of sections.
607
876c34bf 608Changes in 2.18:
98ec6e72 609
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610* Resolved 37 coding problems in bfd including static array overruns, null
611 pointer dereferences and use of a malloc buffer after it has been freed, as
612 revealed by static analysis donated by Coverity, Inc. (http://scan.coverity.com).
1e4cf259 613
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614* The binutils sources are now released under version 3 of the GNU General
615 Public License.
616
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617* A new tool "windmc" has been added for some targets. This is a message
618 compiler which attempts to be compatible with the MS version.
619
620* Add codepage support to the windres tool. It now supports many new
621 resource types (e.g. MANIFEST, TOOLBAR, etc). The output generation
622 for binary files is done now via bfd itself. The endianess problems
623 for different hosts are solved. Dumps of .res files can now be
624 re-compiled by windres without lossing resources or compilation errors.
625 Some problems on dialog resource translations are corrected.
d856f2dd 626
a05a5b64 627* Add --extract-symbol command-line option to objcopy, which will
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RS
628 strip everything out of an ordinary object file or executable except
629 for its symbol table. Files containing just symbols can be useful
630 to some OSes.
631
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632Changes in 2.17:
633
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DJ
634* Add "-x NAME" to readelf in addition to "-x NUMBER".
635
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NC
636* Add -i and -t switches to cxxfilt. -i disables the display of implementation
637 specific extra demangling information (if any) and -t disables the demangling
638 of types.
639
640* Add support for the "@<file>" syntax to the command lines of all tools, so
641 that extra switches can be read from <file>.
642
4de2ad99 643* Add "-W/--dwarf" to objdump to display the contents of the DWARF
cbf1f5df 644 debug sections.
4de2ad99 645
5477e8a0 646* Add "-t/--section-details" to readelf to display section details.
cbf1f5df 647 "-N/--full-section-name" is deprecated.
5477e8a0 648
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649* powerpc-linux ld now supports a variant form of PLT and GOT for the security
650 conscious. This form will automatically be chosen when ld detects that all
651 code in regular object files was generated by gcc -msecure-plt. The old PLT
652 and GOT may be forced by a new ld option, --bss-plt.
653
0c552dc1
FF
654* Add "-i/--inlines" to addr2line to print enclosing scope information
655 for inlined function chains, back to first non-inlined function.
656
81fc812e
L
657* Add "-N/--full-section-name" to readelf to display full section name.
658
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NC
659* Add "-M entry:<addr>" switch to objdump to specify a function entry address
660 when disassembling VAX binaries.
661
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NC
662* Add "--globalize-symbol <name>" and "--globalize-symbols <filename>" switches
663 to objcopy to convert local symbols into global symbols.
3aade688 664
9fbad737 665* gprof now allows input files to have histogram records for
3aade688 666 several memory ranges, provided those ranges are disjoint.
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667
668Changes in 2.16:
669
b12fe839 670* Add "-g/--section-groups" to readelf to display section groups.
81fc812e 671
bcf32829
JB
672* objcopy recognizes two new options --strip-unneeded-symbol and
673 --strip-unneeded-symbols, namely for use together with the wildcard
674 matching the original --strip-symbol/--strip-symbols provided, but
675 retaining any symbols matching but needed by relocations.
676
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677* readelf can now display address ranges from .debug_range sections. This
678 happens automatically when a DW_AT_range attribute is encountered. The
a05a5b64 679 command-line switch --debug-dump=Ranges (or -wR) can also be used to display
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NC
680 the contents of the .debug_range section.
681
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NC
682* nm and objdump now have a switch "--special-syms" to enable the displaying of
683 symbols which the target considers to be special. By default these symbols
684 are no longer displayed. Currently the only special symbols are the Mapping
685 symbols used by the ARM port to mark transitions between text and data and
686 between ARM and THUMB code.
687
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688* dlltool has a switch "--ext-prefix-alias <prefix>" to generate additional
689 import and export symbols with <preifx> prepended to them.
690
691Changes in 2.15:
692
e39893d7 693* objcopy for MIPS targets now accepts "-M no-aliases" as an option to the
9d317d34 694 disassembler to print the "raw" mips instruction mnemonic instead of some
e39893d7
FF
695 pseudo instruction name. I.E. print "daddu" or "or" instead of "move",
696 "sll" instead of "nop", etc.
697
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698* objcopy and strip can now take wildcard patterns in symbol names specified on
699 the command line provided that the --wildcard switch is used to enable them.
700
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NC
701* readelf can now parse archives.
702
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NC
703* objdump now accepts --debugging-tags to print the debug information in a
704 format compatible with ctags tool.
705
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NC
706* objcopy and strip now accept --only-keep-debug to create a file containing
707 those sections that would be stripped out by --strip-debug. The idea is that
708 this can be used in conjunction with the --add-gnu-debuglink switch to create
709 a two part program distribution - one a stripped executable and the other the
710 debugging info.
711
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NC
712* objcopy now accepts --add-gnu-debuglink=<file> to insert a .gnu_debuglink
713 section into a (presumably stripped) executable. This allows the debug
50c2245b 714 information for the file to be held in a separate file.
3aade688 715
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NC
716* BFD marks the sections .comment and .note as 'n' in the BSD/POSIX
717 single-character representation. This can be checked by running nm
718 with the -a switch.
719
43c58ae6
CD
720Changes in 2.14:
721
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NC
722* Added --info switch to objcopy and strip.
723
3b36097d
SC
724* Support for Vitesse IQ2000 added by Red Hat.
725
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NC
726* Added 'S' encoding to strings to allow the display of 8-bit characters.
727
d7fb0dd2
NC
728* Added --prefix-symbols=<text>, --prefix-sections=<text> and
729 --prefix-alloc-sections=<text> to objcopy.
730
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NC
731* readelf can handle the extensions to the DWARF2 spec used by the Unified
732 Parallel C compiler.
733
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AM
734* BFD no longer declares a "boolean" type, to avoid clashes with other
735 headers that declare the same. Users of BFD should replace boolean,
736 false and true, with int, 0 and 1, or define their own boolean type.
737
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NC
738* Support for IP2K added by Denis Chertykov.
739
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NC
740Changes in 2.13:
741
742* Support for the Fujitsu FRV architecture added by Red Hat. Models for FR400
743 and FR500 included.
252b5132 744
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NC
745Changes in version 2.12:
746
49fda6c8
HPN
747* Support for Don Knuth's MMIX, by Hans-Peter Nilsson.
748
15c82623
NC
749* size: Add --totals to display summary of sizes (Berkeley format only).
750
d974e256
JJ
751* readelf: Add --wide option to not break section header or segment listing
752 lines to fit into 80 columns.
753
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NC
754* strings: Add --encoding to display wide character strings. By Markus Kuhn.
755
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NC
756* objcopy: Add --rename-section to change section names.
757
e0c60db2
NC
758* readelf: Support added for DWARF 2.1 extensions. Support added for
759 displaying the contents of .debug.macinfo sections.
760
a05a5b64 761* New command-line switches added to objcopy to allow symbols to be kept as
16b2b71c
NC
762 global symbols, and also to specify files containing lists of such symbols.
763 by Honda Hiroki.
764
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NC
765* Support for OpenRISC by Johan Rydberg.
766
a05a5b64 767* New command-line switch to objcopy --alt-machine-code which creates a binary
1ae8b3d2
AO
768 with an alternate machine code if one is defined in the architecture
769 description. Only supported for ELF targets. By Alexandre Oliva.
770
a05a5b64 771* New command-line switch to objcopy -B (or --binary-architecture) which sets
09ad7db3 772 the architecture of the output file to the given argument. This option only
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NC
773 makes sense, if the input target is binary. Otherwise it is ignored.
774 By Stefan Geuken.
775
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NC
776* Support for PDP-11 by Lars Brinkhoff.
777
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AM
778Changes in binutils 2.11:
779
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NC
780* Add support for ARM v5t and v5te architectures and Intel's XScale ARM
781 extenstions.
782
a05a5b64 783* Add --srec-len and --srec-forceS3 command-line switch to objcopy.
077b8428 784 By Luciano Gemme.
7d036af2 785
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NC
786* Support for the MIPS32, by Anders Norlander.
787
22b36938
JE
788* Support for the i860, by Jason Eckhardt.
789
5bcac8a4
HPN
790* Support for CRIS (Axis Communications ETRAX series).
791
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RH
792Changes in binutils 2.10:
793
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AM
794* Support for 64-bit ELF on HPPA.
795
a05a5b64 796* New command-line switch to objdump --file-start-context which shows the
f1563258 797 entire file contents up to the source line first encountered for a given
7d036af2 798 file.
f1563258 799
a05a5b64 800* New command-line switch to objdump -M (or --disassembler-options) which takes
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NC
801 a parameter which can then be interpreted on a per-target basis by the
802 disassembler. Used by ARM targets to select register name sets, ISA, APCS or
803 raw verions.
7d036af2 804
c2c40d93
ILT
805* objdump support for -mi386:intel which causes disassembly to be displayed
806 with intel syntax.
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807
808* New program: readelf. This displays the contents of ELF format files,
809 regardless of target machine.
810
811* objcopy now takes --change-section-lma, --change-section-vma, and
812 --change-section-address options. The old --adjust-section-vma option is
813 equivalent to --change-section-address. The other --adjust-* options are now
814 renamed to --change-*, although --adjust-* continues to work.
815
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816* objcopy has a --redefine-sym option that lets you rename symbols.
817
818* objcopy now takes a -j/--only-section option to copy only the specified
819 sections.
820
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821* dlltool now supports the IMPORTS command.
822
823* dlltool now takes --export-all-symbols, --no-export-all-symbols,
824 --exclude-symbols, and --no-default-excludes options.
825
826Changes in binutils 2.9:
827
828* Added windres program, which can be used to manipulate resources in WIN32
829 files as used on Windows 95 and Windows NT.
830
831* The objcopy --gap-fill and --pad-to options operate on the LMA rather than
832 the VMA of the sections.
833
834* Added S modifier to ar to not build a symbol table.
835
836Changes in binutils 2.8:
837
838* The objdump disassembly format has been changed, and hopefully improved. Use
839 the new --prefix-addresses option to get the old format. There are also new
840 --disassemble-zeroes and --no-show-raw-insn options which affect disassembler
841 output.
842
843* Formats may now be specified as configuration triplets. For example,
844 objdump -b i386-pc-linux. The triplets are not passed through config.sub,
845 so they must be in canonical form.
846
847* Added new addr2line program. This uses the debugging information to convert
848 an address into a file name and line number within a program.
849
850* Added --change-leading-char argument to objcopy.
851
852* Added --weaken argument to objcopy.
853
854* objdump --dynamic-reloc now works on ELF executables and shared libraries.
855
856* Added --adjust-vma option to objdump.
857
858* Added -C/--demangle option to objdump.
859
860* Added -p/--preserve-dates option to strip and objcopy.
861
862Changes in binutils 2.7:
863
864* Added --enable-shared and --enable-commonbfdlib options to configure.
865
866* Added --debugging argument to objdump and objcopy.
867
868* Added --defined-only argument to nm.
869
870* Added --remove-leading-char argument to objcopy.
871
872* The objdump --line-numbers option is now meaningful with --reloc.
873
874* Added --line-numbers option to nm.
875
876* Added --endian/-EB/-EL option to objdump.
877
878* Added support for Alpha OpenVMS/AXP.
879
880Changes in binutils 2.6:
881
882* Added -N/--strip-symbol and -K/--keep-symbol arguments to strip and objcopy.
883
884* Added several arguments to objcopy to provide some control over how the new
885 file is laid out in memory. Also added binary output format to BFD to permit
886 generating plain binary files.
887
888* Added --start-address and --stop-address options to objdump.
889
890* ar and ranlib now work on AIX. The tools are now built by default on AIX.
891
892Changes in binutils 2.5:
893
894* Changed objdump -dr to dump the relocs interspersed with the assembly
1049f94e 895 listing, for a more useful listing of relocatable files.
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896
897* Changed objdump -d/--disassemble to only disassemble SEC_CODE sections.
898 Added -D/--disassemble-all option to disassemble all sections.
899
900* Added --size-sort option to nm.
901
902* strip and objcopy should now be able to handle dynamically linked ELF
903 executables.
904
905Changes in binutils 2.4:
906
907* Support for HP-PA (by Jeff Law), i386 Mach (by David Mackenzie), RS/6000 and
908 PowerPC (except ar and ranlib; by Ian Taylor).
909
910* Support for Irix 5.
911
912* Programs `strip' and `objcopy' will not attempt to write dynamically linked
913 ELF output files, since BFD currently can't create them properly.
914
915Changes in binutils 2.3:
916
917* A new --stabs argument has been added to objdump to dump stabs sections in
918 ELF and COFF files.
919
920* A new program, nlmconv, has been added. It can convert object files into
921 Novell NetWare Loadable Modules.
922
923* The strings program has been added.
924
925Changes in binutils 2.2:
926
927* The 'copy' program has been renamed to 'objcopy', for consistency with
928 'objdump', and because 'copy' might more plausibly be used as a synonym for
929 'cp'.
930
931* The new stand-alone program c++filt is a filter that converts encoded
932 (mangled) C++ assembly-level identifiers to user-level names. (Note: This
933 may get moved to the gcc distribution.)
934
935* nm -o on an archive now prefixes each line with the archive name, matching
936 the output from BSD nm.
937
938* ar (and ld) can now read (but not write) BSD4.4-style archives.
939
940* New support for H8500, Z8000, and the Hitach SH.
941
942* Dis-assembler interface changed to allow sharing with gdb.
943
944* There is new Elf code, but it is not yet ready for general use.
945
946* There is the beginnings of a test suite.
947
948Changes in binutils 2.1:
949
950* There is now support for writing ECOFF files, so ld and the other utilities
951 should work on Risc/Ultrix and Irix. Please let us know how well this works.
952
953* ar now automatically creates a symbol table (a __.SYMDEF member, in the BSD
954 version), if there are any object files in the archive. So running ranlib is
955 now redundant (unless the non-standard q command is used). This is required
956 for Posix.2 conformance.
957
958* The archive-reading code now reads both BSD-style and SYSV-style archives
959 independently of the selected target format. This is to encourage people to
960 switch to SYSV-format, which has a number of advantages.
961
962* The strip and copy programs now have options to remove debug-symbols only
963 and/or local symbols only. They now also support long options.
964
965\f
fd67aa11 966Copyright (C) 2012-2024 Free Software Foundation, Inc.
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967
968Copying and distribution of this file, with or without modification,
969are permitted in any medium without royalty provided the copyright
970notice and this notice are preserved.
971
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972Local variables:
973fill-column: 79
974End: