Commit | Line | Data |
---|---|---|
c906108c SS |
1 | What has changed in GDB? |
2 | (Organized release by release) | |
3 | ||
75feb17d DJ |
4 | *** Changes since GDB 6.8 |
5 | ||
65d12d83 TT |
6 | * When completing in expressions, gdb will attempt to limit |
7 | completions to allowable structure or union fields, where appropriate. | |
8 | For instance, consider: | |
9 | ||
10 | # struct example { int f1; double f2; }; | |
11 | # struct example variable; | |
12 | (gdb) p variable. | |
13 | ||
14 | If the user types TAB at the end of this command line, the available | |
15 | completions will be "f1" and "f2". | |
16 | ||
08388c79 DE |
17 | * New remote packets |
18 | ||
19 | qSearch:memory: | |
20 | Search memory for a sequence of bytes. | |
21 | ||
060871df PA |
22 | * Removed remote protocol undocumented extension |
23 | ||
24 | An undocumented extension to the remote protocol's `S' stop reply | |
25 | packet that permited the stub to pass a process id was removed. | |
26 | Remote servers should use the `T' stop reply packet instead. | |
27 | ||
d14508fe DE |
28 | * The "disassemble" command now supports an optional /m modifier to print mixed |
29 | source+assembly. | |
30 | ||
c055b101 | 31 | * GDB now supports multiple function calling conventions according to the |
a0ef4274 | 32 | DWARF-2 DW_AT_calling_convention function attribute. |
c055b101 CV |
33 | |
34 | * The SH target utilizes the aforementioned change to distinguish between gcc | |
a0ef4274 DJ |
35 | and Renesas calling convention. It also adds the new CLI commands |
36 | `set/show sh calling-convention'. | |
c055b101 | 37 | |
31fffb02 CS |
38 | * GDB can now read compressed debug sections, as produced by GNU gold |
39 | with the --compress-debug-sections=zlib flag. | |
40 | ||
88d8a8e0 JB |
41 | * 64-bit core files are now supported on AIX. |
42 | ||
ccd213ac DJ |
43 | * Watchpoints can now be set on unreadable memory locations, e.g. addresses |
44 | which will be allocated using malloc later in program execution. | |
45 | ||
1fddbabb | 46 | * The qXfer:libraries:read remote procotol packet now allows passing a |
31fffb02 | 47 | list of section offsets. |
1fddbabb | 48 | |
a0ef4274 DJ |
49 | * On GNU/Linux, GDB can now attach to stopped processes. Several race |
50 | conditions handling signals delivered during attach or thread creation | |
51 | have also been fixed. | |
52 | ||
ccd213ac DJ |
53 | * New features in the GDB remote stub, gdbserver |
54 | ||
55 | - The "--wrapper" command-line argument tells gdbserver to use a | |
56 | wrapper program to launch programs for debugging. | |
57 | ||
7ae0e2a2 UW |
58 | - On PowerPC and S/390 targets, it is now possible to use a single |
59 | gdbserver executable to debug both 32-bit and 64-bit programs. | |
60 | (This requires gdbserver itself to be built as a 64-bit executable.) | |
61 | ||
75feb17d DJ |
62 | * New commands |
63 | ||
08388c79 DE |
64 | find [/size-char] [/max-count] start-address, end-address|+search-space-size, |
65 | val1 [, val2, ...] | |
66 | Search memory for a sequence of bytes. | |
67 | ||
75feb17d DJ |
68 | set debug timetstamp |
69 | show debug timestamp | |
70 | Display timestamps with GDB debugging output. | |
71 | ||
ccd213ac DJ |
72 | set exec-wrapper |
73 | show exec-wrapper | |
74 | unset exec-wrapper | |
75 | Use a wrapper program to launch programs for debugging. | |
fa4727a6 | 76 | |
aad4b048 JB |
77 | set multiple-symbols (all|ask|cancel) |
78 | show multiple-symbols | |
79 | The value of this variable can be changed to adjust the debugger behavior | |
80 | when an expression or a breakpoint location contains an ambiguous symbol | |
81 | name (an overloaded function name, for instance). | |
82 | ||
74960c60 VP |
83 | set breakpoint always-inserted |
84 | show breakpoint always-inserted | |
85 | Keep breakpoints always inserted in the target, as opposed to inserting | |
86 | them when resuming the target, and removing them when the target stops. | |
87 | This option can improve debugger performance on slow remote targets. | |
88 | ||
0428b8f5 DJ |
89 | set arm fallback-mode (arm|thumb|auto) |
90 | show arm fallback-mode | |
91 | set arm force-mode (arm|thumb|auto) | |
92 | show arm force-mode | |
93 | These commands control how ARM GDB determines whether instructions | |
94 | are ARM or Thumb. The default for both settings is auto, which uses | |
95 | the current CPSR value for instructions without symbols; previous | |
96 | versions of GDB behaved as if "set arm fallback-mode arm". | |
97 | ||
7c0d47a5 PA |
98 | * New targets |
99 | ||
100 | x86 DICOS i[34567]86-*-dicos* | |
101 | ||
75feb17d | 102 | *** Changes in GDB 6.8 |
f9ed52be | 103 | |
af5ca30d NH |
104 | * New native configurations |
105 | ||
106 | NetBSD/hppa hppa*-*netbsd* | |
94a0e877 | 107 | Xtensa GNU/Linux xtensa*-*-linux* |
af5ca30d NH |
108 | |
109 | * New targets | |
110 | ||
111 | NetBSD/hppa hppa*-*-netbsd* | |
94a0e877 | 112 | Xtensa GNU/Lunux xtensa*-*-linux* |
af5ca30d | 113 | |
7a404eba PA |
114 | * Change in command line behavior -- corefiles vs. process ids. |
115 | ||
116 | When the '-p NUMBER' or '--pid NUMBER' options are used, and | |
117 | attaching to process NUMBER fails, GDB no longer attempts to open a | |
118 | core file named NUMBER. Attaching to a program using the -c option | |
119 | is no longer supported. Instead, use the '-p' or '--pid' options. | |
120 | ||
430ebac9 PA |
121 | * GDB can now be built as a native debugger for debugging Windows x86 |
122 | (mingw32) Portable Executable (PE) programs. | |
123 | ||
fe6fbf8b | 124 | * Pending breakpoints no longer change their number when their address |
8d5f9c6f | 125 | is resolved. |
fe6fbf8b VP |
126 | |
127 | * GDB now supports breakpoints with multiple locations, | |
8d5f9c6f DJ |
128 | including breakpoints on C++ constructors, inside C++ templates, |
129 | and in inlined functions. | |
fe6fbf8b | 130 | |
10665d76 JB |
131 | * GDB's ability to debug optimized code has been improved. GDB more |
132 | accurately identifies function bodies and lexical blocks that occupy | |
133 | more than one contiguous range of addresses. | |
134 | ||
7cc46491 DJ |
135 | * Target descriptions can now describe registers for PowerPC. |
136 | ||
d71340b8 DJ |
137 | * The GDB remote stub, gdbserver, now supports the AltiVec and SPE |
138 | registers on PowerPC targets. | |
139 | ||
523c4513 DJ |
140 | * The GDB remote stub, gdbserver, now supports thread debugging on GNU/Linux |
141 | targets even when the libthread_db library is not available. | |
142 | ||
a6b151f1 DJ |
143 | * The GDB remote stub, gdbserver, now supports the new file transfer |
144 | commands (remote put, remote get, and remote delete). | |
145 | ||
2d717e4f DJ |
146 | * The GDB remote stub, gdbserver, now supports run and attach in |
147 | extended-remote mode. | |
148 | ||
24a836bd | 149 | * hppa*64*-*-hpux11* target broken |
d001be7a DJ |
150 | The debugger is unable to start a program and fails with the following |
151 | error: "Error trying to get information about dynamic linker". | |
152 | The gdb-6.7 release is also affected. | |
24a836bd | 153 | |
d0c678e6 UW |
154 | * GDB now supports the --enable-targets= configure option to allow |
155 | building a single GDB executable that supports multiple remote | |
156 | target architectures. | |
157 | ||
d64a946d TJB |
158 | * GDB now supports debugging C and C++ programs which use the |
159 | Decimal Floating Point extension. In addition, the PowerPC target | |
160 | now has a set of pseudo-registers to inspect decimal float values | |
161 | stored in two consecutive float registers. | |
162 | ||
ee163bf5 VP |
163 | * The -break-insert MI command can optionally create pending |
164 | breakpoints now. | |
165 | ||
b93b6ca7 | 166 | * Improved support for debugging Ada |
d001be7a DJ |
167 | Many improvements to the Ada language support have been made. These |
168 | include: | |
b93b6ca7 JB |
169 | - Better support for Ada2005 interface types |
170 | - Improved handling of arrays and slices in general | |
171 | - Better support for Taft-amendment types | |
172 | - The '{type} ADDRESS' expression is now allowed on the left hand-side | |
173 | of an assignment | |
174 | - Improved command completion in Ada | |
175 | - Several bug fixes | |
176 | ||
d001be7a DJ |
177 | * GDB on GNU/Linux and HP/UX can now debug through "exec" of a new |
178 | process. | |
179 | ||
a6b151f1 DJ |
180 | * New commands |
181 | ||
6d53d0af JB |
182 | set print frame-arguments (all|scalars|none) |
183 | show print frame-arguments | |
184 | The value of this variable can be changed to control which argument | |
185 | values should be printed by the debugger when displaying a frame. | |
186 | ||
a6b151f1 DJ |
187 | remote put |
188 | remote get | |
189 | remote delete | |
190 | Transfer files to and from a remote target, and delete remote files. | |
191 | ||
192 | * New MI commands | |
193 | ||
194 | -target-file-put | |
195 | -target-file-get | |
196 | -target-file-delete | |
197 | Transfer files to and from a remote target, and delete remote files. | |
198 | ||
199 | * New remote packets | |
200 | ||
201 | vFile:open: | |
202 | vFile:close: | |
203 | vFile:pread: | |
204 | vFile:pwrite: | |
205 | vFile:unlink: | |
206 | Open, close, read, write, and delete files on the remote system. | |
d0c678e6 | 207 | |
2d717e4f DJ |
208 | vAttach |
209 | Attach to an existing process on the remote system, in extended-remote | |
210 | mode. | |
211 | ||
212 | vRun | |
213 | Run a new process on the remote system, in extended-remote mode. | |
214 | ||
8d5f9c6f | 215 | *** Changes in GDB 6.7 |
6dd09645 | 216 | |
19d378fc MS |
217 | * Resolved 101 resource leaks, null pointer dereferences, etc. in gdb, |
218 | bfd, libiberty and opcodes, as revealed by static analysis donated by | |
219 | Coverity, Inc. (http://scan.coverity.com). | |
220 | ||
3a40aaa0 UW |
221 | * When looking up multiply-defined global symbols, GDB will now prefer the |
222 | symbol definition in the current shared library if it was built using the | |
223 | -Bsymbolic linker option. | |
224 | ||
a6ec25f2 BW |
225 | * When the Text User Interface (TUI) is not configured, GDB will now |
226 | recognize the -tui command-line option and print a message that the TUI | |
227 | is not supported. | |
228 | ||
6dd09645 JB |
229 | * The GDB remote stub, gdbserver, now has lower overhead for high |
230 | frequency signals (e.g. SIGALRM) via the QPassSignals packet. | |
231 | ||
c9bb8148 DJ |
232 | * GDB for MIPS targets now autodetects whether a remote target provides |
233 | 32-bit or 64-bit register values. | |
234 | ||
0d5de010 DJ |
235 | * Support for C++ member pointers has been improved. |
236 | ||
23181151 DJ |
237 | * GDB now understands XML target descriptions, which specify the |
238 | target's overall architecture. GDB can read a description from | |
239 | a local file or over the remote serial protocol. | |
240 | ||
ea37ba09 DJ |
241 | * Vectors of single-byte data use a new integer type which is not |
242 | automatically displayed as character or string data. | |
243 | ||
244 | * The /s format now works with the print command. It displays | |
245 | arrays of single-byte integers and pointers to single-byte integers | |
246 | as strings. | |
e1f48ead | 247 | |
123dc839 DJ |
248 | * Target descriptions can now describe target-specific registers, |
249 | for architectures which have implemented the support (currently | |
8d5f9c6f | 250 | only ARM, M68K, and MIPS). |
123dc839 | 251 | |
05a4558a DJ |
252 | * GDB and the GDB remote stub, gdbserver, now support the XScale |
253 | iWMMXt coprocessor. | |
fb1e4ffc | 254 | |
7c963485 PA |
255 | * The GDB remote stub, gdbserver, has been updated to support |
256 | ARM Windows CE (mingw32ce) debugging, and GDB Windows CE support | |
257 | has been rewritten to use the standard GDB remote protocol. | |
258 | ||
b18be20d DJ |
259 | * GDB can now step into C++ functions which are called through thunks. |
260 | ||
0ca420ce UW |
261 | * GDB for the Cell/B.E. SPU now supports overlay debugging. |
262 | ||
31d99776 DJ |
263 | * The GDB remote protocol "qOffsets" packet can now honor ELF segment |
264 | layout. It also supports a TextSeg= and DataSeg= response when only | |
265 | segment base addresses (rather than offsets) are available. | |
266 | ||
a4642986 MR |
267 | * The /i format now outputs any trailing branch delay slot instructions |
268 | immediately following the last instruction within the count specified. | |
269 | ||
cfa9d6d9 DJ |
270 | * The GDB remote protocol "T" stop reply packet now supports a |
271 | "library" response. Combined with the new "qXfer:libraries:read" | |
272 | packet, this response allows GDB to debug shared libraries on targets | |
273 | where the operating system manages the list of loaded libraries (e.g. | |
274 | Windows and SymbianOS). | |
255e7678 DJ |
275 | |
276 | * The GDB remote stub, gdbserver, now supports dynamic link libraries | |
277 | (DLLs) on Windows and Windows CE targets. | |
f5db8714 JK |
278 | |
279 | * GDB now supports a faster verification that a .debug file matches its binary | |
280 | according to its build-id signature, if the signature is present. | |
cfa9d6d9 | 281 | |
c9bb8148 DJ |
282 | * New commands |
283 | ||
23776285 MR |
284 | set remoteflow |
285 | show remoteflow | |
286 | Enable or disable hardware flow control (RTS/CTS) on the serial port | |
287 | when debugging using remote targets. | |
288 | ||
c9bb8148 DJ |
289 | set mem inaccessible-by-default |
290 | show mem inaccessible-by-default | |
291 | If the target supplies a memory map, for instance via the remote | |
292 | protocol's "qXfer:memory-map:read" packet, setting this variable | |
293 | prevents GDB from accessing memory outside the memory map. This | |
294 | is useful for targets with memory mapped registers or which react | |
295 | badly to accesses of unmapped address space. | |
296 | ||
297 | set breakpoint auto-hw | |
298 | show breakpoint auto-hw | |
299 | If the target supplies a memory map, for instance via the remote | |
300 | protocol's "qXfer:memory-map:read" packet, setting this variable | |
301 | lets GDB use hardware breakpoints automatically for memory regions | |
302 | where it can not use software breakpoints. This covers both the | |
303 | "break" command and internal breakpoints used for other commands | |
304 | including "next" and "finish". | |
305 | ||
0e420bd8 JB |
306 | catch exception |
307 | catch exception unhandled | |
308 | Stop the program execution when Ada exceptions are raised. | |
309 | ||
310 | catch assert | |
311 | Stop the program execution when an Ada assertion failed. | |
312 | ||
f822c95b DJ |
313 | set sysroot |
314 | show sysroot | |
315 | Set an alternate system root for target files. This is a more | |
316 | general version of "set solib-absolute-prefix", which is now | |
317 | an alias to "set sysroot". | |
318 | ||
83cc5c53 UW |
319 | info spu |
320 | Provide extended SPU facility status information. This set of | |
321 | commands is available only when debugging the Cell/B.E. SPU | |
322 | architecture. | |
323 | ||
bd372731 MK |
324 | * New native configurations |
325 | ||
326 | OpenBSD/sh sh*-*openbsd* | |
327 | ||
23181151 DJ |
328 | set tdesc filename |
329 | unset tdesc filename | |
330 | show tdesc filename | |
331 | Use the specified local file as an XML target description, and do | |
332 | not query the target for its built-in description. | |
333 | ||
c9bb8148 DJ |
334 | * New targets |
335 | ||
54fe9172 | 336 | OpenBSD/sh sh*-*-openbsd* |
c9bb8148 | 337 | MIPS64 GNU/Linux (gdbserver) mips64-linux-gnu |
c077150c | 338 | Toshiba Media Processor mep-elf |
c9bb8148 | 339 | |
6dd09645 JB |
340 | * New remote packets |
341 | ||
342 | QPassSignals: | |
343 | Ignore the specified signals; pass them directly to the debugged program | |
344 | without stopping other threads or reporting them to GDB. | |
345 | ||
23181151 DJ |
346 | qXfer:features:read: |
347 | Read an XML target description from the target, which describes its | |
348 | features. | |
6dd09645 | 349 | |
83cc5c53 UW |
350 | qXfer:spu:read: |
351 | qXfer:spu:write: | |
352 | Read or write contents of an spufs file on the target system. These | |
353 | packets are available only on the Cell/B.E. SPU architecture. | |
354 | ||
cfa9d6d9 DJ |
355 | qXfer:libraries:read: |
356 | Report the loaded shared libraries. Combined with new "T" packet | |
357 | response, this packet allows GDB to debug shared libraries on | |
358 | targets where the operating system manages the list of loaded | |
359 | libraries (e.g. Windows and SymbianOS). | |
360 | ||
483367ee DJ |
361 | * Removed targets |
362 | ||
363 | Support for these obsolete configurations has been removed. | |
364 | ||
d08950c4 UW |
365 | alpha*-*-osf1* |
366 | alpha*-*-osf2* | |
7ce59000 | 367 | d10v-*-* |
483367ee DJ |
368 | hppa*-*-hiux* |
369 | i[34567]86-ncr-* | |
370 | i[34567]86-*-dgux* | |
371 | i[34567]86-*-lynxos* | |
372 | i[34567]86-*-netware* | |
373 | i[34567]86-*-sco3.2v5* | |
374 | i[34567]86-*-sco3.2v4* | |
375 | i[34567]86-*-sco* | |
376 | i[34567]86-*-sysv4.2* | |
377 | i[34567]86-*-sysv4* | |
378 | i[34567]86-*-sysv5* | |
379 | i[34567]86-*-unixware2* | |
380 | i[34567]86-*-unixware* | |
381 | i[34567]86-*-sysv* | |
382 | i[34567]86-*-isc* | |
383 | m68*-cisco*-* | |
384 | m68*-tandem-* | |
ad527d2e | 385 | mips*-*-pe |
483367ee | 386 | rs6000-*-lynxos* |
ad527d2e | 387 | sh*-*-pe |
483367ee | 388 | |
7ce59000 DJ |
389 | * Other removed features |
390 | ||
391 | target abug | |
392 | target cpu32bug | |
393 | target est | |
394 | target rom68k | |
395 | ||
396 | Various m68k-only ROM monitors. | |
397 | ||
ea35711c DJ |
398 | target hms |
399 | target e7000 | |
400 | target sh3 | |
401 | target sh3e | |
402 | ||
403 | Various Renesas ROM monitors and debugging interfaces for SH and | |
404 | H8/300. | |
405 | ||
406 | target ocd | |
407 | ||
408 | Support for a Macraigor serial interface to on-chip debugging. | |
409 | GDB does not directly support the newer parallel or USB | |
410 | interfaces. | |
411 | ||
7ce59000 DJ |
412 | DWARF 1 support |
413 | ||
414 | A debug information format. The predecessor to DWARF 2 and | |
415 | DWARF 3, which are still supported. | |
416 | ||
54d61198 DJ |
417 | Support for the HP aCC compiler on HP-UX/PA-RISC |
418 | ||
419 | SOM-encapsulated symbolic debugging information, automatic | |
420 | invocation of pxdb, and the aCC custom C++ ABI. This does not | |
421 | affect HP-UX for Itanium or GCC for HP-UX/PA-RISC. Code compiled | |
422 | with aCC can still be debugged on an assembly level. | |
423 | ||
ea35711c DJ |
424 | MIPS ".pdr" sections |
425 | ||
426 | A MIPS-specific format used to describe stack frame layout | |
427 | in debugging information. | |
428 | ||
429 | Scheme support | |
430 | ||
431 | GDB could work with an older version of Guile to debug | |
432 | the interpreter and Scheme programs running in it. | |
433 | ||
1a69e1e4 DJ |
434 | set mips stack-arg-size |
435 | set mips saved-gpreg-size | |
436 | ||
437 | Use "set mips abi" to control parameter passing for MIPS. | |
438 | ||
6dd09645 | 439 | *** Changes in GDB 6.6 |
e374b601 | 440 | |
ca3bf3bd DJ |
441 | * New targets |
442 | ||
443 | Xtensa xtensa-elf | |
9c309e77 | 444 | Cell Broadband Engine SPU spu-elf |
ca3bf3bd | 445 | |
6aec2e11 DJ |
446 | * GDB can now be configured as a cross-debugger targeting native Windows |
447 | (mingw32) or Cygwin. It can communicate with a remote debugging stub | |
448 | running on a Windows system over TCP/IP to debug Windows programs. | |
449 | ||
450 | * The GDB remote stub, gdbserver, has been updated to support Windows and | |
451 | Cygwin debugging. Both single-threaded and multi-threaded programs are | |
452 | supported. | |
453 | ||
17218d91 DJ |
454 | * The "set trust-readonly-sections" command works again. This command was |
455 | broken in GDB 6.3, 6.4, and 6.5. | |
456 | ||
9ebce043 DJ |
457 | * The "load" command now supports writing to flash memory, if the remote |
458 | stub provides the required support. | |
459 | ||
7d3d3ece DJ |
460 | * Support for GNU/Linux Thread Local Storage (TLS, per-thread variables) no |
461 | longer requires symbolic debug information (e.g. DWARF-2). | |
462 | ||
4f8253f3 JB |
463 | * New commands |
464 | ||
465 | set substitute-path | |
466 | unset substitute-path | |
467 | show substitute-path | |
468 | Manage a list of substitution rules that GDB uses to rewrite the name | |
469 | of the directories where the sources are located. This can be useful | |
470 | for instance when the sources were moved to a different location | |
471 | between compilation and debugging. | |
472 | ||
9fa66fd7 AS |
473 | set trace-commands |
474 | show trace-commands | |
475 | Print each CLI command as it is executed. Each command is prefixed with | |
476 | a number of `+' symbols representing the nesting depth. | |
477 | The source command now has a `-v' option to enable the same feature. | |
478 | ||
1f5befc1 DJ |
479 | * REMOVED features |
480 | ||
481 | The ARM Demon monitor support (RDP protocol, "target rdp"). | |
482 | ||
2ec3381a DJ |
483 | Kernel Object Display, an embedded debugging feature which only worked with |
484 | an obsolete version of Cisco IOS. | |
485 | ||
3d00d119 DJ |
486 | The 'set download-write-size' and 'show download-write-size' commands. |
487 | ||
be2a5f71 DJ |
488 | * New remote packets |
489 | ||
490 | qSupported: | |
491 | Tell a stub about GDB client features, and request remote target features. | |
492 | The first feature implemented is PacketSize, which allows the target to | |
493 | specify the size of packets it can handle - to minimize the number of | |
494 | packets required and improve performance when connected to a remote | |
495 | target. | |
496 | ||
0876f84a DJ |
497 | qXfer:auxv:read: |
498 | Fetch an OS auxilliary vector from the remote stub. This packet is a | |
499 | more efficient replacement for qPart:auxv:read. | |
500 | ||
9ebce043 DJ |
501 | qXfer:memory-map:read: |
502 | Fetch a memory map from the remote stub, including information about | |
503 | RAM, ROM, and flash memory devices. | |
504 | ||
505 | vFlashErase: | |
506 | vFlashWrite: | |
507 | vFlashDone: | |
508 | Erase and program a flash memory device. | |
509 | ||
0876f84a DJ |
510 | * Removed remote packets |
511 | ||
512 | qPart:auxv:read: | |
513 | This packet has been replaced by qXfer:auxv:read. Only GDB 6.4 and 6.5 | |
514 | used it, and only gdbserver implemented it. | |
515 | ||
e374b601 | 516 | *** Changes in GDB 6.5 |
53e5f3cf | 517 | |
96309189 MS |
518 | * New targets |
519 | ||
520 | Renesas M32C/M16C m32c-elf | |
521 | ||
522 | Morpho Technologies ms1 ms1-elf | |
523 | ||
53e5f3cf AS |
524 | * New commands |
525 | ||
526 | init-if-undefined Initialize a convenience variable, but | |
527 | only if it doesn't already have a value. | |
528 | ||
ac264b3b MS |
529 | The following commands are presently only implemented for native GNU/Linux: |
530 | ||
531 | checkpoint Save a snapshot of the program state. | |
532 | ||
533 | restart <n> Return the program state to a | |
534 | previously saved state. | |
535 | ||
536 | info checkpoints List currently saved checkpoints. | |
537 | ||
538 | delete-checkpoint <n> Delete a previously saved checkpoint. | |
539 | ||
540 | set|show detach-on-fork Tell gdb whether to detach from a newly | |
541 | forked process, or to keep debugging it. | |
542 | ||
543 | info forks List forks of the user program that | |
544 | are available to be debugged. | |
545 | ||
546 | fork <n> Switch to debugging one of several | |
547 | forks of the user program that are | |
548 | available to be debugged. | |
549 | ||
550 | delete-fork <n> Delete a fork from the list of forks | |
551 | that are available to be debugged (and | |
552 | kill the forked process). | |
553 | ||
554 | detach-fork <n> Delete a fork from the list of forks | |
555 | that are available to be debugged (and | |
556 | allow the process to continue). | |
557 | ||
3950dc3f NS |
558 | * New architecture |
559 | ||
560 | Morpho Technologies ms2 ms1-elf | |
561 | ||
0ea3f30e DJ |
562 | * Improved Windows host support |
563 | ||
564 | GDB now builds as a cross debugger hosted on i686-mingw32, including | |
565 | native console support, and remote communications using either | |
566 | network sockets or serial ports. | |
567 | ||
f79daebb GM |
568 | * Improved Modula-2 language support |
569 | ||
570 | GDB can now print most types in the Modula-2 syntax. This includes: | |
571 | basic types, set types, record types, enumerated types, range types, | |
572 | pointer types and ARRAY types. Procedure var parameters are correctly | |
573 | printed and hexadecimal addresses and character constants are also | |
574 | written in the Modula-2 syntax. Best results can be obtained by using | |
575 | GNU Modula-2 together with the -gdwarf-2 command line option. | |
576 | ||
acab6ab2 MM |
577 | * REMOVED features |
578 | ||
579 | The ARM rdi-share module. | |
580 | ||
f4267320 DJ |
581 | The Netware NLM debug server. |
582 | ||
53e5f3cf | 583 | *** Changes in GDB 6.4 |
156a53ca | 584 | |
e0ecbda1 MK |
585 | * New native configurations |
586 | ||
02a677ac | 587 | OpenBSD/arm arm*-*-openbsd* |
e0ecbda1 MK |
588 | OpenBSD/mips64 mips64-*-openbsd* |
589 | ||
d64a6579 KB |
590 | * New targets |
591 | ||
592 | Morpho Technologies ms1 ms1-elf | |
593 | ||
b33a6190 AS |
594 | * New command line options |
595 | ||
596 | --batch-silent As for --batch, but totally silent. | |
597 | --return-child-result The debugger will exist with the same value | |
598 | the child (debugged) program exited with. | |
599 | --eval-command COMMAND, -ex COMMAND | |
600 | Execute a single GDB CLI command. This may be | |
601 | specified multiple times and in conjunction | |
602 | with the --command (-x) option. | |
603 | ||
11dced61 AC |
604 | * Deprecated commands removed |
605 | ||
606 | The following commands, that were deprecated in 2000, have been | |
607 | removed: | |
608 | ||
609 | Command Replacement | |
610 | set|show arm disassembly-flavor set|show arm disassembler | |
611 | othernames set arm disassembler | |
612 | set|show remotedebug set|show debug remote | |
613 | set|show archdebug set|show debug arch | |
614 | set|show eventdebug set|show debug event | |
615 | regs info registers | |
616 | ||
6fe85783 MK |
617 | * New BSD user-level threads support |
618 | ||
619 | It is now possible to debug programs using the user-level threads | |
620 | library on OpenBSD and FreeBSD. Currently supported (target) | |
621 | configurations are: | |
622 | ||
623 | FreeBSD/amd64 x86_64-*-freebsd* | |
624 | FreeBSD/i386 i386-*-freebsd* | |
625 | OpenBSD/i386 i386-*-openbsd* | |
626 | ||
627 | Note that the new kernel threads libraries introduced in FreeBSD 5.x | |
628 | are not yet supported. | |
629 | ||
5260ca71 MS |
630 | * New support for Matsushita MN10300 w/sim added |
631 | (Work in progress). mn10300-elf. | |
632 | ||
e84ecc99 AC |
633 | * REMOVED configurations and files |
634 | ||
635 | VxWorks and the XDR protocol *-*-vxworks | |
9445aa30 | 636 | Motorola MCORE mcore-*-* |
9445aa30 | 637 | National Semiconductor NS32000 ns32k-*-* |
156a53ca | 638 | |
31e35378 JB |
639 | * New "set print array-indexes" command |
640 | ||
641 | After turning this setting "on", GDB prints the index of each element | |
642 | when displaying arrays. The default is "off" to preserve the previous | |
643 | behavior. | |
644 | ||
e85e5c83 MK |
645 | * VAX floating point support |
646 | ||
647 | GDB now supports the not-quite-ieee VAX F and D floating point formats. | |
648 | ||
d91e9901 AS |
649 | * User-defined command support |
650 | ||
651 | In addition to using $arg0..$arg9 for argument passing, it is now possible | |
652 | to use $argc to determine now many arguments have been passed. See the | |
653 | section on user-defined commands in the user manual for more information. | |
654 | ||
f2cb65ca MC |
655 | *** Changes in GDB 6.3: |
656 | ||
f47b1503 AS |
657 | * New command line option |
658 | ||
659 | GDB now accepts -l followed by a number to set the timeout for remote | |
660 | debugging. | |
661 | ||
f2cb65ca MC |
662 | * GDB works with GCC -feliminate-dwarf2-dups |
663 | ||
664 | GDB now supports a more compact representation of DWARF-2 debug | |
665 | information using DW_FORM_ref_addr references. These are produced | |
666 | by GCC with the option -feliminate-dwarf2-dups and also by some | |
667 | proprietary compilers. With GCC, you must use GCC 3.3.4 or later | |
668 | to use -feliminate-dwarf2-dups. | |
860660cb | 669 | |
d08c0230 AC |
670 | * Internationalization |
671 | ||
672 | When supported by the host system, GDB will be built with | |
673 | internationalization (libintl). The task of marking up the sources is | |
674 | continued, we're looking forward to our first translation. | |
675 | ||
117ea3cf PH |
676 | * Ada |
677 | ||
678 | Initial support for debugging programs compiled with the GNAT | |
679 | implementation of the Ada programming language has been integrated | |
680 | into GDB. In this release, support is limited to expression evaluation. | |
681 | ||
d08c0230 AC |
682 | * New native configurations |
683 | ||
684 | GNU/Linux/m32r m32r-*-linux-gnu | |
685 | ||
686 | * Remote 'p' packet | |
687 | ||
688 | GDB's remote protocol now includes support for the 'p' packet. This | |
689 | packet is used to fetch individual registers from a remote inferior. | |
690 | ||
691 | * END-OF-LIFE registers[] compatibility module | |
692 | ||
693 | GDB's internal register infrastructure has been completely rewritten. | |
694 | The new infrastructure making possible the implementation of key new | |
695 | features including 32x64 (e.g., 64-bit amd64 GDB debugging a 32-bit | |
696 | i386 application). | |
697 | ||
698 | GDB 6.3 will be the last release to include the the registers[] | |
699 | compatibility module that allowed out-of-date configurations to | |
700 | continue to work. This change directly impacts the following | |
701 | configurations: | |
702 | ||
703 | hppa-*-hpux | |
704 | ia64-*-aix | |
705 | mips-*-irix* | |
706 | *-*-lynx | |
707 | mips-*-linux-gnu | |
708 | sds protocol | |
709 | xdr protocol | |
710 | powerpc bdm protocol | |
711 | ||
712 | Unless there is activity to revive these configurations, they will be | |
713 | made OBSOLETE in GDB 6.4, and REMOVED from GDB 6.5. | |
714 | ||
715 | * OBSOLETE configurations and files | |
716 | ||
717 | Configurations that have been declared obsolete in this release have | |
718 | been commented out. Unless there is activity to revive these | |
719 | configurations, the next release of GDB will have their sources | |
720 | permanently REMOVED. | |
721 | ||
722 | h8300-*-* | |
723 | mcore-*-* | |
724 | mn10300-*-* | |
725 | ns32k-*-* | |
726 | sh64-*-* | |
727 | v850-*-* | |
728 | ||
ebb7c577 AC |
729 | *** Changes in GDB 6.2.1: |
730 | ||
731 | * MIPS `break main; run' gave an heuristic-fence-post warning | |
732 | ||
733 | When attempting to run even a simple program, a warning about | |
734 | heuristic-fence-post being hit would be reported. This problem has | |
735 | been fixed. | |
736 | ||
737 | * MIPS IRIX 'long double' crashed GDB | |
738 | ||
739 | When examining a long double variable, GDB would get a segmentation | |
740 | fault. The crash has been fixed (but GDB 6.2 cannot correctly examine | |
741 | IRIX long double values). | |
742 | ||
743 | * VAX and "next" | |
744 | ||
745 | A bug in the VAX stack code was causing problems with the "next" | |
746 | command. This problem has been fixed. | |
747 | ||
860660cb | 748 | *** Changes in GDB 6.2: |
faae5abe | 749 | |
0dea2468 AC |
750 | * Fix for ``many threads'' |
751 | ||
752 | On GNU/Linux systems that use the NPTL threads library, a program | |
753 | rapidly creating and deleting threads would confuse GDB leading to the | |
754 | error message: | |
755 | ||
756 | ptrace: No such process. | |
757 | thread_db_get_info: cannot get thread info: generic error | |
758 | ||
759 | This problem has been fixed. | |
760 | ||
2c07db7a AC |
761 | * "-async" and "-noasync" options removed. |
762 | ||
763 | Support for the broken "-noasync" option has been removed (it caused | |
764 | GDB to dump core). | |
765 | ||
c23968a2 JB |
766 | * New ``start'' command. |
767 | ||
768 | This command runs the program until the begining of the main procedure. | |
769 | ||
71009278 MK |
770 | * New BSD Kernel Data Access Library (libkvm) interface |
771 | ||
772 | Using ``target kvm'' it is now possible to debug kernel core dumps and | |
773 | live kernel memory images on various FreeBSD, NetBSD and OpenBSD | |
774 | platforms. Currently supported (native-only) configurations are: | |
775 | ||
776 | FreeBSD/amd64 x86_64-*-freebsd* | |
777 | FreeBSD/i386 i?86-*-freebsd* | |
778 | NetBSD/i386 i?86-*-netbsd* | |
779 | NetBSD/m68k m68*-*-netbsd* | |
780 | NetBSD/sparc sparc-*-netbsd* | |
781 | OpenBSD/amd64 x86_64-*-openbsd* | |
782 | OpenBSD/i386 i?86-*-openbsd* | |
783 | OpenBSD/m68k m68*-openbsd* | |
784 | OpenBSD/sparc sparc-*-openbsd* | |
785 | ||
3c0b7db2 AC |
786 | * Signal trampoline code overhauled |
787 | ||
788 | Many generic problems with GDB's signal handling code have been fixed. | |
789 | These include: backtraces through non-contiguous stacks; recognition | |
790 | of sa_sigaction signal trampolines; backtrace from a NULL pointer | |
791 | call; backtrace through a signal trampoline; step into and out of | |
792 | signal handlers; and single-stepping in the signal trampoline. | |
793 | ||
73cc75f3 AC |
794 | Please note that kernel bugs are a limiting factor here. These |
795 | features have been shown to work on an s390 GNU/Linux system that | |
796 | include a 2.6.8-rc1 kernel. Ref PR breakpoints/1702. | |
3c0b7db2 | 797 | |
7243600a BF |
798 | * Cygwin support for DWARF 2 added. |
799 | ||
6f606e1c MK |
800 | * New native configurations |
801 | ||
97dc871c | 802 | GNU/Linux/hppa hppa*-*-linux* |
0e56aeaf | 803 | OpenBSD/hppa hppa*-*-openbsd* |
bf2ca189 MK |
804 | OpenBSD/m68k m68*-*-openbsd* |
805 | OpenBSD/m88k m88*-*-openbsd* | |
d195bc9f | 806 | OpenBSD/powerpc powerpc-*-openbsd* |
6f606e1c | 807 | NetBSD/vax vax-*-netbsd* |
9f076e7a | 808 | OpenBSD/vax vax-*-openbsd* |
6f606e1c | 809 | |
a1b461bf AC |
810 | * END-OF-LIFE frame compatibility module |
811 | ||
812 | GDB's internal frame infrastructure has been completely rewritten. | |
813 | The new infrastructure making it possible to support key new features | |
814 | including DWARF 2 Call Frame Information. To aid in the task of | |
815 | migrating old configurations to this new infrastructure, a | |
816 | compatibility module, that allowed old configurations to continue to | |
817 | work, was also included. | |
818 | ||
819 | GDB 6.2 will be the last release to include this frame compatibility | |
820 | module. This change directly impacts the following configurations: | |
821 | ||
822 | h8300-*-* | |
823 | mcore-*-* | |
824 | mn10300-*-* | |
825 | ns32k-*-* | |
826 | sh64-*-* | |
827 | v850-*-* | |
828 | xstormy16-*-* | |
829 | ||
830 | Unless there is activity to revive these configurations, they will be | |
831 | made OBSOLETE in GDB 6.3, and REMOVED from GDB 6.4. | |
832 | ||
3c7012f5 AC |
833 | * REMOVED configurations and files |
834 | ||
835 | Sun 3, running SunOS 3 m68*-*-sunos3* | |
836 | Sun 3, running SunOS 4 m68*-*-sunos4* | |
837 | Sun 2, running SunOS 3 m68000-*-sunos3* | |
838 | Sun 2, running SunOS 4 m68000-*-sunos4* | |
839 | Motorola 680x0 running LynxOS m68*-*-lynxos* | |
840 | AT&T 3b1/Unix pc m68*-att-* | |
841 | Bull DPX2 (68k, System V release 3) m68*-bull-sysv* | |
842 | decstation mips-dec-* mips-little-* | |
843 | riscos mips-*-riscos* mips-*-sysv* | |
844 | sonymips mips-sony-* | |
845 | sysv mips*-*-sysv4* (IRIX 5/6 not included) | |
846 | ||
e5fe55f7 AC |
847 | *** Changes in GDB 6.1.1: |
848 | ||
849 | * TUI (Text-mode User Interface) built-in (also included in GDB 6.1) | |
850 | ||
851 | The TUI (Text-mode User Interface) is now built as part of a default | |
852 | GDB configuration. It is enabled by either selecting the TUI with the | |
853 | command line option "-i=tui" or by running the separate "gdbtui" | |
854 | program. For more information on the TUI, see the manual "Debugging | |
855 | with GDB". | |
856 | ||
857 | * Pending breakpoint support (also included in GDB 6.1) | |
858 | ||
859 | Support has been added to allow you to specify breakpoints in shared | |
860 | libraries that have not yet been loaded. If a breakpoint location | |
861 | cannot be found, and the "breakpoint pending" option is set to auto, | |
862 | GDB queries you if you wish to make the breakpoint pending on a future | |
863 | shared-library load. If and when GDB resolves the breakpoint symbol, | |
864 | the pending breakpoint is removed as one or more regular breakpoints | |
865 | are created. | |
866 | ||
867 | Pending breakpoints are very useful for GCJ Java debugging. | |
868 | ||
869 | * Fixed ISO-C build problems | |
870 | ||
871 | The files bfd/elf-bfd.h, gdb/dictionary.c and gdb/types.c contained | |
872 | non ISO-C code that stopped them being built using a more strict ISO-C | |
873 | compiler (e.g., IBM's C compiler). | |
874 | ||
875 | * Fixed build problem on IRIX 5 | |
876 | ||
877 | Due to header problems with <sys/proc.h>, the file gdb/proc-api.c | |
878 | wasn't able to compile compile on an IRIX 5 system. | |
879 | ||
880 | * Added execute permission to gdb/gdbserver/configure | |
881 | ||
882 | The shell script gdb/testsuite/gdb.stabs/configure lacked execute | |
883 | permission. This bug would cause configure to fail on a number of | |
884 | systems (Solaris, IRIX). Ref: server/519. | |
885 | ||
886 | * Fixed build problem on hpux2.0w-hp-hpux11.00 using the HP ANSI C compiler | |
887 | ||
888 | Older HPUX ANSI C compilers did not accept variable array sizes. somsolib.c | |
889 | has been updated to use constant array sizes. | |
890 | ||
891 | * Fixed a panic in the DWARF Call Frame Info code on Solaris 2.7 | |
892 | ||
893 | GCC 3.3.2, on Solaris 2.7, includes the DW_EH_PE_funcrel encoding in | |
894 | its generated DWARF Call Frame Info. This encoding was causing GDB to | |
895 | panic, that panic has been fixed. Ref: gdb/1628. | |
896 | ||
897 | * Fixed a problem when examining parameters in shared library code. | |
898 | ||
899 | When examining parameters in optimized shared library code generated | |
900 | by a mainline GCC, GDB would incorrectly report ``Variable "..." is | |
901 | not available''. GDB now correctly displays the variable's value. | |
902 | ||
faae5abe | 903 | *** Changes in GDB 6.1: |
f2c06f52 | 904 | |
9175c9a3 MC |
905 | * Removed --with-mmalloc |
906 | ||
907 | Support for the mmalloc memory manager has been removed, as it | |
908 | conflicted with the internal gdb byte cache. | |
909 | ||
3cc87ec0 MK |
910 | * Changes in AMD64 configurations |
911 | ||
912 | The AMD64 target now includes the %cs and %ss registers. As a result | |
913 | the AMD64 remote protocol has changed; this affects the floating-point | |
914 | and SSE registers. If you rely on those registers for your debugging, | |
915 | you should upgrade gdbserver on the remote side. | |
916 | ||
f0424ef6 MK |
917 | * Revised SPARC target |
918 | ||
919 | The SPARC target has been completely revised, incorporating the | |
920 | FreeBSD/sparc64 support that was added for GDB 6.0. As a result | |
03cebad2 MK |
921 | support for LynxOS and SunOS 4 has been dropped. Calling functions |
922 | from within GDB on operating systems with a non-executable stack | |
923 | (Solaris, OpenBSD) now works. | |
f0424ef6 | 924 | |
59659be2 ILT |
925 | * New C++ demangler |
926 | ||
927 | GDB has a new C++ demangler which does a better job on the mangled | |
928 | names generated by current versions of g++. It also runs faster, so | |
929 | with this and other changes gdb should now start faster on large C++ | |
930 | programs. | |
931 | ||
9e08b29b DJ |
932 | * DWARF 2 Location Expressions |
933 | ||
934 | GDB support for location expressions has been extended to support function | |
935 | arguments and frame bases. Older versions of GDB could crash when they | |
936 | encountered these. | |
937 | ||
8dfe8985 DC |
938 | * C++ nested types and namespaces |
939 | ||
940 | GDB's support for nested types and namespaces in C++ has been | |
941 | improved, especially if you use the DWARF 2 debugging format. (This | |
942 | is the default for recent versions of GCC on most platforms.) | |
943 | Specifically, if you have a class "Inner" defined within a class or | |
944 | namespace "Outer", then GDB realizes that the class's name is | |
945 | "Outer::Inner", not simply "Inner". This should greatly reduce the | |
946 | frequency of complaints about not finding RTTI symbols. In addition, | |
947 | if you are stopped at inside of a function defined within a namespace, | |
948 | GDB modifies its name lookup accordingly. | |
949 | ||
cced5e27 MK |
950 | * New native configurations |
951 | ||
952 | NetBSD/amd64 x86_64-*-netbsd* | |
27d1e716 | 953 | OpenBSD/amd64 x86_64-*-openbsd* |
2031c21a | 954 | OpenBSD/alpha alpha*-*-openbsd* |
f2cab569 MK |
955 | OpenBSD/sparc sparc-*-openbsd* |
956 | OpenBSD/sparc64 sparc64-*-openbsd* | |
cced5e27 | 957 | |
b4b4b794 KI |
958 | * New debugging protocols |
959 | ||
960 | M32R with SDI protocol m32r-*-elf* | |
961 | ||
7989c619 AC |
962 | * "set prompt-escape-char" command deleted. |
963 | ||
964 | The command "set prompt-escape-char" has been deleted. This command, | |
965 | and its very obscure effet on GDB's prompt, was never documented, | |
966 | tested, nor mentioned in the NEWS file. | |
967 | ||
5994185b AC |
968 | * OBSOLETE configurations and files |
969 | ||
970 | Configurations that have been declared obsolete in this release have | |
971 | been commented out. Unless there is activity to revive these | |
972 | configurations, the next release of GDB will have their sources | |
973 | permanently REMOVED. | |
974 | ||
975 | Sun 3, running SunOS 3 m68*-*-sunos3* | |
976 | Sun 3, running SunOS 4 m68*-*-sunos4* | |
977 | Sun 2, running SunOS 3 m68000-*-sunos3* | |
978 | Sun 2, running SunOS 4 m68000-*-sunos4* | |
979 | Motorola 680x0 running LynxOS m68*-*-lynxos* | |
980 | AT&T 3b1/Unix pc m68*-att-* | |
981 | Bull DPX2 (68k, System V release 3) m68*-bull-sysv* | |
0748d941 AC |
982 | decstation mips-dec-* mips-little-* |
983 | riscos mips-*-riscos* mips-*-sysv* | |
984 | sonymips mips-sony-* | |
985 | sysv mips*-*-sysv4* (IRIX 5/6 not included) | |
5994185b | 986 | |
0ddabb4c AC |
987 | * REMOVED configurations and files |
988 | ||
989 | SGI Irix-4.x mips-sgi-irix4 or iris4 | |
990 | SGI Iris (MIPS) running Irix V3: mips-sgi-irix or iris | |
4a8269c0 AC |
991 | Z8000 simulator z8k-zilog-none or z8ksim |
992 | Matsushita MN10200 w/simulator mn10200-*-* | |
993 | H8/500 simulator h8500-hitachi-hms or h8500hms | |
994 | HP/PA running BSD hppa*-*-bsd* | |
995 | HP/PA running OSF/1 hppa*-*-osf* | |
996 | HP/PA Pro target hppa*-*-pro* | |
997 | PMAX (MIPS) running Mach 3.0 mips*-*-mach3* | |
cf7c5c23 | 998 | 386BSD i[3456]86-*-bsd* |
4a8269c0 AC |
999 | Sequent family i[3456]86-sequent-sysv4* |
1000 | i[3456]86-sequent-sysv* | |
1001 | i[3456]86-sequent-bsd* | |
f0424ef6 MK |
1002 | SPARC running LynxOS sparc-*-lynxos* |
1003 | SPARC running SunOS 4 sparc-*-sunos4* | |
4a8269c0 AC |
1004 | Tsqware Sparclet sparclet-*-* |
1005 | Fujitsu SPARClite sparclite-fujitsu-none or sparclite | |
0ddabb4c | 1006 | |
c7f1390e DJ |
1007 | *** Changes in GDB 6.0: |
1008 | ||
1fe43d45 AC |
1009 | * Objective-C |
1010 | ||
1011 | Support for debugging the Objective-C programming language has been | |
1012 | integrated into GDB. | |
1013 | ||
e6beb428 AC |
1014 | * New backtrace mechanism (includes DWARF 2 Call Frame Information). |
1015 | ||
1016 | DWARF 2's Call Frame Information makes available compiler generated | |
1017 | information that more exactly describes the program's run-time stack. | |
1018 | By using this information, GDB is able to provide more robust stack | |
1019 | backtraces. | |
1020 | ||
1021 | The i386, amd64 (nee, x86-64), Alpha, m68hc11, ia64, and m32r targets | |
1022 | have been updated to use a new backtrace mechanism which includes | |
1023 | DWARF 2 CFI support. | |
1024 | ||
1025 | * Hosted file I/O. | |
1026 | ||
1027 | GDB's remote protocol has been extended to include support for hosted | |
1028 | file I/O (where the remote target uses GDB's file system). See GDB's | |
1029 | remote protocol documentation for details. | |
1030 | ||
1031 | * All targets using the new architecture framework. | |
1032 | ||
1033 | All of GDB's targets have been updated to use the new internal | |
1034 | architecture framework. The way is now open for future GDB releases | |
1035 | to include cross-architecture native debugging support (i386 on amd64, | |
1036 | ppc32 on ppc64). | |
1037 | ||
1038 | * GNU/Linux's Thread Local Storage (TLS) | |
1039 | ||
1040 | GDB now includes support for for the GNU/Linux implementation of | |
1041 | per-thread variables. | |
1042 | ||
1043 | * GNU/Linux's Native POSIX Thread Library (NPTL) | |
1044 | ||
1045 | GDB's thread code has been updated to work with either the new | |
1046 | GNU/Linux NPTL thread library or the older "LinuxThreads" library. | |
1047 | ||
1048 | * Separate debug info. | |
1049 | ||
1050 | GDB, in conjunction with BINUTILS, now supports a mechanism for | |
1051 | automatically loading debug information from a separate file. Instead | |
1052 | of shipping full debug and non-debug versions of system libraries, | |
1053 | system integrators can now instead ship just the stripped libraries | |
1054 | and optional debug files. | |
1055 | ||
1056 | * DWARF 2 Location Expressions | |
1057 | ||
1058 | DWARF 2 Location Expressions allow the compiler to more completely | |
1059 | describe the location of variables (even in optimized code) to the | |
1060 | debugger. | |
1061 | ||
1062 | GDB now includes preliminary support for location expressions (support | |
1063 | for DW_OP_piece is still missing). | |
1064 | ||
1065 | * Java | |
1066 | ||
1067 | A number of long standing bugs that caused GDB to die while starting a | |
1068 | Java application have been fixed. GDB's Java support is now | |
1069 | considered "useable". | |
1070 | ||
85f8f974 DJ |
1071 | * GNU/Linux support for fork, vfork, and exec. |
1072 | ||
1073 | The "catch fork", "catch exec", "catch vfork", and "set follow-fork-mode" | |
1074 | commands are now implemented for GNU/Linux. They require a 2.5.x or later | |
1075 | kernel. | |
1076 | ||
0fac0b41 DJ |
1077 | * GDB supports logging output to a file |
1078 | ||
1079 | There are two new commands, "set logging" and "show logging", which can be | |
1080 | used to capture GDB's output to a file. | |
f2c06f52 | 1081 | |
6ad8ae5c DJ |
1082 | * The meaning of "detach" has changed for gdbserver |
1083 | ||
1084 | The "detach" command will now resume the application, as documented. To | |
1085 | disconnect from gdbserver and leave it stopped, use the new "disconnect" | |
1086 | command. | |
1087 | ||
e286caf2 | 1088 | * d10v, m68hc11 `regs' command deprecated |
5f601589 AC |
1089 | |
1090 | The `info registers' command has been updated so that it displays the | |
1091 | registers using a format identical to the old `regs' command. | |
1092 | ||
d28f9cdf DJ |
1093 | * Profiling support |
1094 | ||
1095 | A new command, "maint set profile on/off", has been added. This command can | |
1096 | be used to enable or disable profiling while running GDB, to profile a | |
1097 | session or a set of commands. In addition there is a new configure switch, | |
1098 | "--enable-profiling", which will cause GDB to be compiled with profiling | |
1099 | data, for more informative profiling results. | |
1100 | ||
da0f9dcd AC |
1101 | * Default MI syntax changed to "mi2". |
1102 | ||
1103 | The default MI (machine interface) syntax, enabled by the command line | |
1104 | option "-i=mi", has been changed to "mi2". The previous MI syntax, | |
b68767c1 | 1105 | "mi1", can be enabled by specifying the option "-i=mi1". |
da0f9dcd AC |
1106 | |
1107 | Support for the original "mi0" syntax (included in GDB 5.0) has been | |
1108 | removed. | |
1109 | ||
fb9b6b35 JJ |
1110 | Fix for gdb/192: removed extraneous space when displaying frame level. |
1111 | Fix for gdb/672: update changelist is now output in mi list format. | |
1112 | Fix for gdb/702: a -var-assign that updates the value now shows up | |
1113 | in a subsequent -var-update. | |
1114 | ||
954a4db8 MK |
1115 | * New native configurations. |
1116 | ||
1117 | FreeBSD/amd64 x86_64-*-freebsd* | |
1118 | ||
6760f9e6 JB |
1119 | * Multi-arched targets. |
1120 | ||
b4263afa | 1121 | HP/PA HPUX11 hppa*-*-hpux* |
85a453d5 | 1122 | Renesas M32R/D w/simulator m32r-*-elf* |
6760f9e6 | 1123 | |
1b831c93 AC |
1124 | * OBSOLETE configurations and files |
1125 | ||
1126 | Configurations that have been declared obsolete in this release have | |
1127 | been commented out. Unless there is activity to revive these | |
1128 | configurations, the next release of GDB will have their sources | |
1129 | permanently REMOVED. | |
1130 | ||
8b0e5691 | 1131 | Z8000 simulator z8k-zilog-none or z8ksim |
67f16606 | 1132 | Matsushita MN10200 w/simulator mn10200-*-* |
fd2299bd | 1133 | H8/500 simulator h8500-hitachi-hms or h8500hms |
56056df7 AC |
1134 | HP/PA running BSD hppa*-*-bsd* |
1135 | HP/PA running OSF/1 hppa*-*-osf* | |
1136 | HP/PA Pro target hppa*-*-pro* | |
78c43945 | 1137 | PMAX (MIPS) running Mach 3.0 mips*-*-mach3* |
2fbce691 AC |
1138 | Sequent family i[3456]86-sequent-sysv4* |
1139 | i[3456]86-sequent-sysv* | |
1140 | i[3456]86-sequent-bsd* | |
f81824a9 AC |
1141 | Tsqware Sparclet sparclet-*-* |
1142 | Fujitsu SPARClite sparclite-fujitsu-none or sparclite | |
fd2299bd | 1143 | |
5835abe7 NC |
1144 | * REMOVED configurations and files |
1145 | ||
1146 | V850EA ISA | |
1b831c93 AC |
1147 | Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88 |
1148 | IBM AIX PS/2 i[3456]86-*-aix | |
1149 | i386 running Mach 3.0 i[3456]86-*-mach3* | |
1150 | i386 running Mach i[3456]86-*-mach* | |
1151 | i386 running OSF/1 i[3456]86-*osf1mk* | |
1152 | HP/Apollo 68k Family m68*-apollo*-sysv*, | |
1153 | m68*-apollo*-bsd*, | |
1154 | m68*-hp-bsd*, m68*-hp-hpux* | |
1155 | Argonaut Risc Chip (ARC) arc-*-* | |
1156 | Mitsubishi D30V d30v-*-* | |
1157 | Fujitsu FR30 fr30-*-elf* | |
1158 | OS/9000 i[34]86-*-os9k | |
1159 | I960 with MON960 i960-*-coff | |
5835abe7 | 1160 | |
a094c6fb AC |
1161 | * MIPS $fp behavior changed |
1162 | ||
1163 | The convenience variable $fp, for the MIPS, now consistently returns | |
1164 | the address of the current frame's base. Previously, depending on the | |
1165 | context, $fp could refer to either $sp or the current frame's base | |
1166 | address. See ``8.10 Registers'' in the manual ``Debugging with GDB: | |
1167 | The GNU Source-Level Debugger''. | |
1168 | ||
299ffc64 | 1169 | *** Changes in GDB 5.3: |
37057839 | 1170 | |
46248966 AC |
1171 | * GNU/Linux shared library multi-threaded performance improved. |
1172 | ||
1173 | When debugging a multi-threaded application on GNU/Linux, GDB now uses | |
1174 | `/proc', in preference to `ptrace' for memory reads. This may result | |
1175 | in an improvement in the start-up time of multi-threaded, shared | |
1176 | library applications when run under GDB. One GDB user writes: ``loads | |
1177 | shared libs like mad''. | |
1178 | ||
b9d14705 | 1179 | * ``gdbserver'' now supports multi-threaded applications on some targets |
6da02953 | 1180 | |
b9d14705 DJ |
1181 | Support for debugging multi-threaded applications which use |
1182 | the GNU/Linux LinuxThreads package has been added for | |
1183 | arm*-*-linux*-gnu*, i[3456]86-*-linux*-gnu*, mips*-*-linux*-gnu*, | |
1184 | powerpc*-*-linux*-gnu*, and sh*-*-linux*-gnu*. | |
6da02953 | 1185 | |
e0e9281e JB |
1186 | * GDB now supports C/C++ preprocessor macros. |
1187 | ||
1188 | GDB now expands preprocessor macro invocations in C/C++ expressions, | |
1189 | and provides various commands for showing macro definitions and how | |
1190 | they expand. | |
1191 | ||
dd73b9bb AC |
1192 | The new command `macro expand EXPRESSION' expands any macro |
1193 | invocations in expression, and shows the result. | |
1194 | ||
1195 | The new command `show macro MACRO-NAME' shows the definition of the | |
1196 | macro named MACRO-NAME, and where it was defined. | |
1197 | ||
e0e9281e JB |
1198 | Most compilers don't include information about macros in the debugging |
1199 | information by default. In GCC 3.1, for example, you need to compile | |
1200 | your program with the options `-gdwarf-2 -g3'. If the macro | |
1201 | information is present in the executable, GDB will read it. | |
1202 | ||
2250ee0c CV |
1203 | * Multi-arched targets. |
1204 | ||
6e3ba3b8 JT |
1205 | DEC Alpha (partial) alpha*-*-* |
1206 | DEC VAX (partial) vax-*-* | |
2250ee0c | 1207 | NEC V850 v850-*-* |
6e3ba3b8 | 1208 | National Semiconductor NS32000 (partial) ns32k-*-* |
a1789893 GS |
1209 | Motorola 68000 (partial) m68k-*-* |
1210 | Motorola MCORE mcore-*-* | |
2250ee0c | 1211 | |
cd9bfe15 | 1212 | * New targets. |
e33ce519 | 1213 | |
456f8b9d DB |
1214 | Fujitsu FRV architecture added by Red Hat frv*-*-* |
1215 | ||
e33ce519 | 1216 | |
da8ca43d JT |
1217 | * New native configurations |
1218 | ||
1219 | Alpha NetBSD alpha*-*-netbsd* | |
029923d4 | 1220 | SH NetBSD sh*-*-netbsdelf* |
45888261 | 1221 | MIPS NetBSD mips*-*-netbsd* |
9ce5c36a | 1222 | UltraSPARC NetBSD sparc64-*-netbsd* |
da8ca43d | 1223 | |
cd9bfe15 AC |
1224 | * OBSOLETE configurations and files |
1225 | ||
1226 | Configurations that have been declared obsolete in this release have | |
1227 | been commented out. Unless there is activity to revive these | |
1228 | configurations, the next release of GDB will have their sources | |
1229 | permanently REMOVED. | |
1230 | ||
92eb23c5 | 1231 | Mitsubishi D30V d30v-*-* |
a99a9e1b | 1232 | OS/9000 i[34]86-*-os9k |
1c7cc583 | 1233 | IBM AIX PS/2 i[3456]86-*-aix |
7a3085c1 | 1234 | Fujitsu FR30 fr30-*-elf* |
7fb623f7 | 1235 | Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88 |
eb4c54a2 | 1236 | Argonaut Risc Chip (ARC) arc-*-* |
d8ee244c MK |
1237 | i386 running Mach 3.0 i[3456]86-*-mach3* |
1238 | i386 running Mach i[3456]86-*-mach* | |
1239 | i386 running OSF/1 i[3456]86-*osf1mk* | |
822e978b AC |
1240 | HP/Apollo 68k Family m68*-apollo*-sysv*, |
1241 | m68*-apollo*-bsd*, | |
1242 | m68*-hp-bsd*, m68*-hp-hpux* | |
4d210288 | 1243 | I960 with MON960 i960-*-coff |
92eb23c5 | 1244 | |
db034ac5 AC |
1245 | * OBSOLETE languages |
1246 | ||
1247 | CHILL, a Pascal like language used by telecommunications companies. | |
1248 | ||
cd9bfe15 AC |
1249 | * REMOVED configurations and files |
1250 | ||
1251 | AMD 29k family via UDI a29k-amd-udi, udi29k | |
1252 | A29K VxWorks a29k-*-vxworks | |
1253 | AMD 29000 embedded, using EBMON a29k-none-none | |
1254 | AMD 29000 embedded with COFF a29k-none-coff | |
1255 | AMD 29000 embedded with a.out a29k-none-aout | |
1256 | ||
1257 | testsuite/gdb.hp/gdb.threads-hp/ directory | |
1258 | ||
20f01a46 DH |
1259 | * New command "set max-user-call-depth <nnn>" |
1260 | ||
1261 | This command allows the user to limit the call depth of user-defined | |
1262 | commands. The default is 1024. | |
1263 | ||
a5941fbf MK |
1264 | * Changes in FreeBSD/i386 native debugging. |
1265 | ||
1266 | Support for the "generate-core-file" has been added. | |
1267 | ||
89743e04 MS |
1268 | * New commands "dump", "append", and "restore". |
1269 | ||
1270 | These commands allow data to be copied from target memory | |
1271 | to a bfd-format or binary file (dump and append), and back | |
1272 | from a file into memory (restore). | |
37057839 | 1273 | |
9fb14e79 JB |
1274 | * Improved "next/step" support on multi-processor Alpha Tru64. |
1275 | ||
1276 | The previous single-step mechanism could cause unpredictable problems, | |
1277 | including the random appearance of SIGSEGV or SIGTRAP signals. The use | |
1278 | of a software single-step mechanism prevents this. | |
1279 | ||
2037aebb AC |
1280 | *** Changes in GDB 5.2.1: |
1281 | ||
1282 | * New targets. | |
1283 | ||
1284 | Atmel AVR avr*-*-* | |
1285 | ||
1286 | * Bug fixes | |
1287 | ||
1288 | gdb/182: gdb/323: gdb/237: On alpha, gdb was reporting: | |
1289 | mdebugread.c:2443: gdb-internal-error: sect_index_data not initialized | |
1290 | Fix, by Joel Brobecker imported from mainline. | |
1291 | ||
1292 | gdb/439: gdb/291: On some ELF object files, gdb was reporting: | |
1293 | dwarf2read.c:1072: gdb-internal-error: sect_index_text not initialize | |
1294 | Fix, by Fred Fish, imported from mainline. | |
1295 | ||
1296 | Dwarf2 .debug_frame & .eh_frame handler improved in many ways. | |
1297 | Surprisingly enough, it works now. | |
1298 | By Michal Ludvig, imported from mainline. | |
1299 | ||
1300 | i386 hardware watchpoint support: | |
1301 | avoid misses on second run for some targets. | |
1302 | By Pierre Muller, imported from mainline. | |
1303 | ||
37057839 | 1304 | *** Changes in GDB 5.2: |
eb7cedd9 | 1305 | |
1a703748 MS |
1306 | * New command "set trust-readonly-sections on[off]". |
1307 | ||
1308 | This command is a hint that tells gdb that read-only sections | |
1309 | really are read-only (ie. that their contents will not change). | |
1310 | In this mode, gdb will go to the object file rather than the | |
1311 | target to read memory from read-only sections (such as ".text"). | |
1312 | This can be a significant performance improvement on some | |
1313 | (notably embedded) targets. | |
1314 | ||
cefd4ef5 MS |
1315 | * New command "generate-core-file" (or "gcore"). |
1316 | ||
55241689 AC |
1317 | This new gdb command allows the user to drop a core file of the child |
1318 | process state at any time. So far it's been implemented only for | |
1319 | GNU/Linux and Solaris, but should be relatively easily ported to other | |
1320 | hosts. Argument is core file name (defaults to core.<pid>). | |
cefd4ef5 | 1321 | |
352ed7b4 MS |
1322 | * New command line option |
1323 | ||
1324 | GDB now accepts --pid or -p followed by a process id. | |
1325 | ||
1326 | * Change in command line behavior -- corefiles vs. process ids. | |
1327 | ||
1328 | There is a subtle behavior in the way in which GDB handles | |
1329 | command line arguments. The first non-flag argument is always | |
1330 | a program to debug, but the second non-flag argument may either | |
1331 | be a corefile or a process id. Previously, GDB would attempt to | |
1332 | open the second argument as a corefile, and if that failed, would | |
1333 | issue a superfluous error message and then attempt to attach it as | |
1334 | a process. Now, if the second argument begins with a non-digit, | |
1335 | it will be treated as a corefile. If it begins with a digit, | |
1336 | GDB will attempt to attach it as a process, and if no such process | |
1337 | is found, will then attempt to open it as a corefile. | |
1338 | ||
fe419ffc RE |
1339 | * Changes in ARM configurations. |
1340 | ||
1341 | Multi-arch support is enabled for all ARM configurations. The ARM/NetBSD | |
1342 | configuration is fully multi-arch. | |
1343 | ||
eb7cedd9 MK |
1344 | * New native configurations |
1345 | ||
fe419ffc | 1346 | ARM NetBSD arm*-*-netbsd* |
eb7cedd9 | 1347 | x86 OpenBSD i[3456]86-*-openbsd* |
55241689 | 1348 | AMD x86-64 running GNU/Linux x86_64-*-linux-* |
768f0842 | 1349 | Sparc64 running FreeBSD sparc64-*-freebsd* |
eb7cedd9 | 1350 | |
c9f63e6b CV |
1351 | * New targets |
1352 | ||
1353 | Sanyo XStormy16 xstormy16-elf | |
1354 | ||
9b4ff276 AC |
1355 | * OBSOLETE configurations and files |
1356 | ||
1357 | Configurations that have been declared obsolete in this release have | |
1358 | been commented out. Unless there is activity to revive these | |
1359 | configurations, the next release of GDB will have their sources | |
1360 | permanently REMOVED. | |
1361 | ||
1362 | AMD 29k family via UDI a29k-amd-udi, udi29k | |
1363 | A29K VxWorks a29k-*-vxworks | |
1364 | AMD 29000 embedded, using EBMON a29k-none-none | |
1365 | AMD 29000 embedded with COFF a29k-none-coff | |
1366 | AMD 29000 embedded with a.out a29k-none-aout | |
1367 | ||
b4ceaee6 | 1368 | testsuite/gdb.hp/gdb.threads-hp/ directory |
9b4ff276 | 1369 | |
e2caac18 AC |
1370 | * REMOVED configurations and files |
1371 | ||
1372 | TI TMS320C80 tic80-*-* | |
7bc65f05 | 1373 | WDC 65816 w65-*-* |
7768dd6c AC |
1374 | PowerPC Solaris powerpcle-*-solaris* |
1375 | PowerPC Windows NT powerpcle-*-cygwin32 | |
1376 | PowerPC Netware powerpc-*-netware* | |
5e734e1f | 1377 | Harris/CXUX m88k m88*-harris-cxux* |
1406caf7 AC |
1378 | Most ns32k hosts and targets ns32k-*-mach3* ns32k-umax-* |
1379 | ns32k-utek-sysv* ns32k-utek-* | |
7e24f0b1 | 1380 | SunOS 4.0.Xi on i386 i[3456]86-*-sunos* |
9b567150 | 1381 | Ultracomputer (29K) running Sym1 a29k-nyu-sym1 a29k-*-kern* |
3680c638 AC |
1382 | Sony NEWS (68K) running NEWSOS 3.x m68*-sony-sysv news |
1383 | ISI Optimum V (3.05) under 4.3bsd. m68*-isi-* | |
a752853e | 1384 | Apple Macintosh (MPW) host and target N/A host, powerpc-*-macos* |
e2caac18 | 1385 | |
c2a727fa TT |
1386 | * Changes to command line processing |
1387 | ||
1388 | The new `--args' feature can be used to specify command-line arguments | |
1389 | for the inferior from gdb's command line. | |
1390 | ||
467d8519 TT |
1391 | * Changes to key bindings |
1392 | ||
1393 | There is a new `operate-and-get-next' function bound to `C-o'. | |
1394 | ||
7072a954 AC |
1395 | *** Changes in GDB 5.1.1 |
1396 | ||
1397 | Fix compile problem on DJGPP. | |
1398 | ||
1399 | Fix a problem with floating-point registers on the i386 being | |
1400 | corrupted. | |
1401 | ||
1402 | Fix to stop GDB crashing on .debug_str debug info. | |
1403 | ||
1404 | Numerous documentation fixes. | |
1405 | ||
1406 | Numerous testsuite fixes. | |
1407 | ||
34f47bc4 | 1408 | *** Changes in GDB 5.1: |
139760b7 MK |
1409 | |
1410 | * New native configurations | |
1411 | ||
1412 | Alpha FreeBSD alpha*-*-freebsd* | |
1413 | x86 FreeBSD 3.x and 4.x i[3456]86*-freebsd[34]* | |
55241689 | 1414 | MIPS GNU/Linux mips*-*-linux* |
e23194cb EZ |
1415 | MIPS SGI Irix 6.x mips*-sgi-irix6* |
1416 | ia64 AIX ia64-*-aix* | |
55241689 | 1417 | s390 and s390x GNU/Linux {s390,s390x}-*-linux* |
139760b7 | 1418 | |
bf64bfd6 AC |
1419 | * New targets |
1420 | ||
def90278 | 1421 | Motorola 68HC11 and 68HC12 m68hc11-elf |
24be5c34 | 1422 | CRIS cris-axis |
55241689 | 1423 | UltraSparc running GNU/Linux sparc64-*-linux* |
def90278 | 1424 | |
17e78a56 | 1425 | * OBSOLETE configurations and files |
bf64bfd6 AC |
1426 | |
1427 | x86 FreeBSD before 2.2 i[3456]86*-freebsd{1,2.[01]}*, | |
9b9c068d | 1428 | Harris/CXUX m88k m88*-harris-cxux* |
bb19ff3b AC |
1429 | Most ns32k hosts and targets ns32k-*-mach3* ns32k-umax-* |
1430 | ns32k-utek-sysv* ns32k-utek-* | |
76f4ea53 AC |
1431 | TI TMS320C80 tic80-*-* |
1432 | WDC 65816 w65-*-* | |
4a1968f4 | 1433 | Ultracomputer (29K) running Sym1 a29k-nyu-sym1 a29k-*-kern* |
1b2b2c16 AC |
1434 | PowerPC Solaris powerpcle-*-solaris* |
1435 | PowerPC Windows NT powerpcle-*-cygwin32 | |
1436 | PowerPC Netware powerpc-*-netware* | |
24f89b68 | 1437 | SunOS 4.0.Xi on i386 i[3456]86-*-sunos* |
514e603d AC |
1438 | Sony NEWS (68K) running NEWSOS 3.x m68*-sony-sysv news |
1439 | ISI Optimum V (3.05) under 4.3bsd. m68*-isi-* | |
d036b4d9 | 1440 | Apple Macintosh (MPW) host N/A |
bf64bfd6 | 1441 | |
17e78a56 AC |
1442 | stuff.c (Program to stuff files into a specially prepared space in kdb) |
1443 | kdb-start.c (Main loop for the standalone kernel debugger) | |
1444 | ||
7fcca85b AC |
1445 | Configurations that have been declared obsolete in this release have |
1446 | been commented out. Unless there is activity to revive these | |
1447 | configurations, the next release of GDB will have their sources | |
1448 | permanently REMOVED. | |
1449 | ||
a196c81c | 1450 | * REMOVED configurations and files |
7fcca85b AC |
1451 | |
1452 | Altos 3068 m68*-altos-* | |
1453 | Convex c1-*-*, c2-*-* | |
1454 | Pyramid pyramid-*-* | |
1455 | ARM RISCix arm-*-* (as host) | |
1456 | Tahoe tahoe-*-* | |
a196c81c | 1457 | ser-ocd.c *-*-* |
bf64bfd6 | 1458 | |
6d6b80e5 | 1459 | * GDB has been converted to ISO C. |
e23194cb | 1460 | |
6d6b80e5 | 1461 | GDB's source code has been converted to ISO C. In particular, the |
e23194cb EZ |
1462 | sources are fully protoized, and rely on standard headers being |
1463 | present. | |
1464 | ||
bf64bfd6 AC |
1465 | * Other news: |
1466 | ||
e23194cb EZ |
1467 | * "info symbol" works on platforms which use COFF, ECOFF, XCOFF, and NLM. |
1468 | ||
1469 | * The MI enabled by default. | |
1470 | ||
1471 | The new machine oriented interface (MI) introduced in GDB 5.0 has been | |
1472 | revised and enabled by default. Packages which use GDB as a debugging | |
1473 | engine behind a UI or another front end are encouraged to switch to | |
1474 | using the GDB/MI interface, instead of the old annotations interface | |
1475 | which is now deprecated. | |
1476 | ||
1477 | * Support for debugging Pascal programs. | |
1478 | ||
1479 | GDB now includes support for debugging Pascal programs. The following | |
1480 | main features are supported: | |
1481 | ||
1482 | - Pascal-specific data types such as sets; | |
1483 | ||
1484 | - automatic recognition of Pascal sources based on file-name | |
1485 | extension; | |
1486 | ||
1487 | - Pascal-style display of data types, variables, and functions; | |
1488 | ||
1489 | - a Pascal expression parser. | |
1490 | ||
1491 | However, some important features are not yet supported. | |
1492 | ||
1493 | - Pascal string operations are not supported at all; | |
1494 | ||
1495 | - there are some problems with boolean types; | |
1496 | ||
1497 | - Pascal type hexadecimal constants are not supported | |
1498 | because they conflict with the internal variables format; | |
1499 | ||
1500 | - support for Pascal objects and classes is not full yet; | |
1501 | ||
1502 | - unlike Pascal, GDB is case-sensitive for symbol names. | |
1503 | ||
1504 | * Changes in completion. | |
1505 | ||
1506 | Commands such as `shell', `run' and `set args', which pass arguments | |
1507 | to inferior programs, now complete on file names, similar to what | |
1508 | users expect at the shell prompt. | |
1509 | ||
1510 | Commands which accept locations, such as `disassemble', `print', | |
1511 | `breakpoint', `until', etc. now complete on filenames as well as | |
1512 | program symbols. Thus, if you type "break foob TAB", and the source | |
1513 | files linked into the programs include `foobar.c', that file name will | |
1514 | be one of the candidates for completion. However, file names are not | |
1515 | considered for completion after you typed a colon that delimits a file | |
1516 | name from a name of a function in that file, as in "break foo.c:bar". | |
1517 | ||
1518 | `set demangle-style' completes on available demangling styles. | |
1519 | ||
1520 | * New platform-independent commands: | |
1521 | ||
1522 | It is now possible to define a post-hook for a command as well as a | |
1523 | hook that runs before the command. For more details, see the | |
1524 | documentation of `hookpost' in the GDB manual. | |
1525 | ||
1526 | * Changes in GNU/Linux native debugging. | |
1527 | ||
d7275149 MK |
1528 | Support for debugging multi-threaded programs has been completely |
1529 | revised for all platforms except m68k and sparc. You can now debug as | |
1530 | many threads as your system allows you to have. | |
1531 | ||
e23194cb EZ |
1532 | Attach/detach is supported for multi-threaded programs. |
1533 | ||
d7275149 MK |
1534 | Support for SSE registers was added for x86. This doesn't work for |
1535 | multi-threaded programs though. | |
e23194cb EZ |
1536 | |
1537 | * Changes in MIPS configurations. | |
bf64bfd6 AC |
1538 | |
1539 | Multi-arch support is enabled for all MIPS configurations. | |
1540 | ||
e23194cb EZ |
1541 | GDB can now be built as native debugger on SGI Irix 6.x systems for |
1542 | debugging n32 executables. (Debugging 64-bit executables is not yet | |
1543 | supported.) | |
1544 | ||
1545 | * Unified support for hardware watchpoints in all x86 configurations. | |
1546 | ||
1547 | Most (if not all) native x86 configurations support hardware-assisted | |
1548 | breakpoints and watchpoints in a unified manner. This support | |
1549 | implements debug register sharing between watchpoints, which allows to | |
1550 | put a virtually infinite number of watchpoints on the same address, | |
1551 | and also supports watching regions up to 16 bytes with several debug | |
1552 | registers. | |
1553 | ||
1554 | The new maintenance command `maintenance show-debug-regs' toggles | |
1555 | debugging print-outs in functions that insert, remove, and test | |
1556 | watchpoints and hardware breakpoints. | |
1557 | ||
1558 | * Changes in the DJGPP native configuration. | |
1559 | ||
1560 | New command ``info dos sysinfo'' displays assorted information about | |
1561 | the CPU, OS, memory, and DPMI server. | |
1562 | ||
1563 | New commands ``info dos gdt'', ``info dos ldt'', and ``info dos idt'' | |
1564 | display information about segment descriptors stored in GDT, LDT, and | |
1565 | IDT. | |
1566 | ||
1567 | New commands ``info dos pde'' and ``info dos pte'' display entries | |
1568 | from Page Directory and Page Tables (for now works with CWSDPMI only). | |
1569 | New command ``info dos address-pte'' displays the Page Table entry for | |
1570 | a given linear address. | |
1571 | ||
1572 | GDB can now pass command lines longer than 126 characters to the | |
1573 | program being debugged (requires an update to the libdbg.a library | |
1574 | which is part of the DJGPP development kit). | |
1575 | ||
1576 | DWARF2 debug info is now supported. | |
1577 | ||
6c56c069 EZ |
1578 | It is now possible to `step' and `next' through calls to `longjmp'. |
1579 | ||
e23194cb EZ |
1580 | * Changes in documentation. |
1581 | ||
1582 | All GDB documentation was converted to GFDL, the GNU Free | |
1583 | Documentation License. | |
1584 | ||
1585 | Tracepoints-related commands are now fully documented in the GDB | |
1586 | manual. | |
1587 | ||
1588 | TUI, the Text-mode User Interface, is now documented in the manual. | |
1589 | ||
1590 | Tracepoints-related commands are now fully documented in the GDB | |
1591 | manual. | |
1592 | ||
1593 | The "GDB Internals" manual now has an index. It also includes | |
1594 | documentation of `ui_out' functions, GDB coding standards, x86 | |
1595 | hardware watchpoints, and memory region attributes. | |
1596 | ||
5d6640b1 AC |
1597 | * GDB's version number moved to ``version.in'' |
1598 | ||
1599 | The Makefile variable VERSION has been replaced by the file | |
1600 | ``version.in''. People creating GDB distributions should update the | |
1601 | contents of this file. | |
1602 | ||
1a1d8446 AC |
1603 | * gdba.el deleted |
1604 | ||
1605 | GUD support is now a standard part of the EMACS distribution. | |
139760b7 | 1606 | |
9debab2f | 1607 | *** Changes in GDB 5.0: |
7a292a7a | 1608 | |
c63ce875 EZ |
1609 | * Improved support for debugging FP programs on x86 targets |
1610 | ||
1611 | Unified and much-improved support for debugging floating-point | |
1612 | programs on all x86 targets. In particular, ``info float'' now | |
1613 | displays the FP registers in the same format on all x86 targets, with | |
1614 | greater level of detail. | |
1615 | ||
1616 | * Improvements and bugfixes in hardware-assisted watchpoints | |
1617 | ||
1618 | It is now possible to watch array elements, struct members, and | |
1619 | bitfields with hardware-assisted watchpoints. Data-read watchpoints | |
1620 | on x86 targets no longer erroneously trigger when the address is | |
1621 | written. | |
1622 | ||
1623 | * Improvements in the native DJGPP version of GDB | |
1624 | ||
1625 | The distribution now includes all the scripts and auxiliary files | |
1626 | necessary to build the native DJGPP version on MS-DOS/MS-Windows | |
1627 | machines ``out of the box''. | |
1628 | ||
1629 | The DJGPP version can now debug programs that use signals. It is | |
1630 | possible to catch signals that happened in the debuggee, deliver | |
1631 | signals to it, interrupt it with Ctrl-C, etc. (Previously, a signal | |
1632 | would kill the program being debugged.) Programs that hook hardware | |
1633 | interrupts (keyboard, timer, etc.) can also be debugged. | |
1634 | ||
1635 | It is now possible to debug DJGPP programs that redirect their | |
1636 | standard handles or switch them to raw (as opposed to cooked) mode, or | |
1637 | even close them. The command ``run < foo > bar'' works as expected, | |
1638 | and ``info terminal'' reports useful information about the debuggee's | |
1639 | terminal, including raw/cooked mode, redirection, etc. | |
1640 | ||
1641 | The DJGPP version now uses termios functions for console I/O, which | |
1642 | enables debugging graphics programs. Interrupting GDB with Ctrl-C | |
1643 | also works. | |
1644 | ||
1645 | DOS-style file names with drive letters are now fully supported by | |
1646 | GDB. | |
1647 | ||
1648 | It is now possible to debug DJGPP programs that switch their working | |
1649 | directory. It is also possible to rerun the debuggee any number of | |
1650 | times without restarting GDB; thus, you can use the same setup, | |
1651 | breakpoints, etc. for many debugging sessions. | |
1652 | ||
ed9a39eb JM |
1653 | * New native configurations |
1654 | ||
1655 | ARM GNU/Linux arm*-*-linux* | |
afc05dd4 | 1656 | PowerPC GNU/Linux powerpc-*-linux* |
ed9a39eb | 1657 | |
7a292a7a SS |
1658 | * New targets |
1659 | ||
96baa820 | 1660 | Motorola MCore mcore-*-* |
adf40b2e JM |
1661 | x86 VxWorks i[3456]86-*-vxworks* |
1662 | PowerPC VxWorks powerpc-*-vxworks* | |
7a292a7a SS |
1663 | TI TMS320C80 tic80-*-* |
1664 | ||
085dd6e6 JM |
1665 | * OBSOLETE configurations |
1666 | ||
1667 | Altos 3068 m68*-altos-* | |
1668 | Convex c1-*-*, c2-*-* | |
9846de1b | 1669 | Pyramid pyramid-*-* |
ed9a39eb | 1670 | ARM RISCix arm-*-* (as host) |
104c1213 | 1671 | Tahoe tahoe-*-* |
7a292a7a | 1672 | |
9debab2f AC |
1673 | Configurations that have been declared obsolete will be commented out, |
1674 | but the code will be left in place. If there is no activity to revive | |
1675 | these configurations before the next release of GDB, the sources will | |
1676 | be permanently REMOVED. | |
1677 | ||
5330533d SS |
1678 | * Gould support removed |
1679 | ||
1680 | Support for the Gould PowerNode and NP1 has been removed. | |
1681 | ||
bc9e5bbf AC |
1682 | * New features for SVR4 |
1683 | ||
1684 | On SVR4 native platforms (such as Solaris), if you attach to a process | |
1685 | without first loading a symbol file, GDB will now attempt to locate and | |
1686 | load symbols from the running process's executable file. | |
1687 | ||
1688 | * Many C++ enhancements | |
1689 | ||
1690 | C++ support has been greatly improved. Overload resolution now works properly | |
1691 | in almost all cases. RTTI support is on the way. | |
1692 | ||
adf40b2e JM |
1693 | * Remote targets can connect to a sub-program |
1694 | ||
1695 | A popen(3) style serial-device has been added. This device starts a | |
1696 | sub-process (such as a stand-alone simulator) and then communicates | |
1697 | with that. The sub-program to run is specified using the syntax | |
1698 | ``|<program> <args>'' vis: | |
1699 | ||
1700 | (gdb) set remotedebug 1 | |
1701 | (gdb) target extended-remote |mn10300-elf-sim program-args | |
1702 | ||
43e526b9 JM |
1703 | * MIPS 64 remote protocol |
1704 | ||
1705 | A long standing bug in the mips64 remote protocol where by GDB | |
1706 | expected certain 32 bit registers (ex SR) to be transfered as 32 | |
1707 | instead of 64 bits has been fixed. | |
1708 | ||
1709 | The command ``set remote-mips64-transfers-32bit-regs on'' has been | |
1710 | added to provide backward compatibility with older versions of GDB. | |
1711 | ||
96baa820 JM |
1712 | * ``set remotebinarydownload'' replaced by ``set remote X-packet'' |
1713 | ||
1714 | The command ``set remotebinarydownload'' command has been replaced by | |
1715 | ``set remote X-packet''. Other commands in ``set remote'' family | |
1716 | include ``set remote P-packet''. | |
1717 | ||
11cf8741 JM |
1718 | * Breakpoint commands accept ranges. |
1719 | ||
1720 | The breakpoint commands ``enable'', ``disable'', and ``delete'' now | |
1721 | accept a range of breakpoints, e.g. ``5-7''. The tracepoint command | |
1722 | ``tracepoint passcount'' also accepts a range of tracepoints. | |
1723 | ||
7876dd43 DB |
1724 | * ``apropos'' command added. |
1725 | ||
1726 | The ``apropos'' command searches through command names and | |
1727 | documentation strings, printing out matches, making it much easier to | |
1728 | try to find a command that does what you are looking for. | |
1729 | ||
bc9e5bbf AC |
1730 | * New MI interface |
1731 | ||
1732 | A new machine oriented interface (MI) has been added to GDB. This | |
1733 | interface is designed for debug environments running GDB as a separate | |
7162c0ca EZ |
1734 | process. This is part of the long term libGDB project. See the |
1735 | "GDB/MI" chapter of the GDB manual for further information. It can be | |
1736 | enabled by configuring with: | |
bc9e5bbf AC |
1737 | |
1738 | .../configure --enable-gdbmi | |
1739 | ||
c906108c SS |
1740 | *** Changes in GDB-4.18: |
1741 | ||
1742 | * New native configurations | |
1743 | ||
1744 | HP-UX 10.20 hppa*-*-hpux10.20 | |
1745 | HP-UX 11.x hppa*-*-hpux11.0* | |
55241689 | 1746 | M68K GNU/Linux m68*-*-linux* |
c906108c SS |
1747 | |
1748 | * New targets | |
1749 | ||
1750 | Fujitsu FR30 fr30-*-elf* | |
1751 | Intel StrongARM strongarm-*-* | |
1752 | Mitsubishi D30V d30v-*-* | |
1753 | ||
1754 | * OBSOLETE configurations | |
1755 | ||
1756 | Gould PowerNode, NP1 np1-*-*, pn-*-* | |
1757 | ||
1758 | Configurations that have been declared obsolete will be commented out, | |
1759 | but the code will be left in place. If there is no activity to revive | |
1760 | these configurations before the next release of GDB, the sources will | |
1761 | be permanently REMOVED. | |
1762 | ||
1763 | * ANSI/ISO C | |
1764 | ||
1765 | As a compatibility experiment, GDB's source files buildsym.h and | |
1766 | buildsym.c have been converted to pure standard C, no longer | |
1767 | containing any K&R compatibility code. We believe that all systems in | |
1768 | use today either come with a standard C compiler, or have a GCC port | |
1769 | available. If this is not true, please report the affected | |
1770 | configuration to bug-gdb@gnu.org immediately. See the README file for | |
1771 | information about getting a standard C compiler if you don't have one | |
1772 | already. | |
1773 | ||
1774 | * Readline 2.2 | |
1775 | ||
1776 | GDB now uses readline 2.2. | |
1777 | ||
1778 | * set extension-language | |
1779 | ||
1780 | You can now control the mapping between filename extensions and source | |
1781 | languages by using the `set extension-language' command. For instance, | |
1782 | you can ask GDB to treat .c files as C++ by saying | |
1783 | set extension-language .c c++ | |
1784 | The command `info extensions' lists all of the recognized extensions | |
1785 | and their associated languages. | |
1786 | ||
1787 | * Setting processor type for PowerPC and RS/6000 | |
1788 | ||
1789 | When GDB is configured for a powerpc*-*-* or an rs6000*-*-* target, | |
1790 | you can use the `set processor' command to specify what variant of the | |
1791 | PowerPC family you are debugging. The command | |
1792 | ||
1793 | set processor NAME | |
1794 | ||
1795 | sets the PowerPC/RS6000 variant to NAME. GDB knows about the | |
1796 | following PowerPC and RS6000 variants: | |
1797 | ||
1798 | ppc-uisa PowerPC UISA - a PPC processor as viewed by user-level code | |
1799 | rs6000 IBM RS6000 ("POWER") architecture, user-level view | |
1800 | 403 IBM PowerPC 403 | |
1801 | 403GC IBM PowerPC 403GC | |
1802 | 505 Motorola PowerPC 505 | |
1803 | 860 Motorola PowerPC 860 or 850 | |
1804 | 601 Motorola PowerPC 601 | |
1805 | 602 Motorola PowerPC 602 | |
1806 | 603 Motorola/IBM PowerPC 603 or 603e | |
1807 | 604 Motorola PowerPC 604 or 604e | |
1808 | 750 Motorola/IBM PowerPC 750 or 750 | |
1809 | ||
1810 | At the moment, this command just tells GDB what to name the | |
1811 | special-purpose processor registers. Since almost all the affected | |
1812 | registers are inaccessible to user-level programs, this command is | |
1813 | only useful for remote debugging in its present form. | |
1814 | ||
1815 | * HP-UX support | |
1816 | ||
1817 | Thanks to a major code donation from Hewlett-Packard, GDB now has much | |
1818 | more extensive support for HP-UX. Added features include shared | |
1819 | library support, kernel threads and hardware watchpoints for 11.00, | |
1820 | support for HP's ANSI C and C++ compilers, and a compatibility mode | |
1821 | for xdb and dbx commands. | |
1822 | ||
1823 | * Catchpoints | |
1824 | ||
1825 | HP's donation includes the new concept of catchpoints, which is a | |
1826 | generalization of the old catch command. On HP-UX, it is now possible | |
1827 | to catch exec, fork, and vfork, as well as library loading. | |
1828 | ||
1829 | This means that the existing catch command has changed; its first | |
1830 | argument now specifies the type of catch to be set up. See the | |
1831 | output of "help catch" for a list of catchpoint types. | |
1832 | ||
1833 | * Debugging across forks | |
1834 | ||
1835 | On HP-UX, you can choose which process to debug when a fork() happens | |
1836 | in the inferior. | |
1837 | ||
1838 | * TUI | |
1839 | ||
1840 | HP has donated a curses-based terminal user interface (TUI). To get | |
1841 | it, build with --enable-tui. Although this can be enabled for any | |
1842 | configuration, at present it only works for native HP debugging. | |
1843 | ||
1844 | * GDB remote protocol additions | |
1845 | ||
1846 | A new protocol packet 'X' that writes binary data is now available. | |
1847 | Default behavior is to try 'X', then drop back to 'M' if the stub | |
1848 | fails to respond. The settable variable `remotebinarydownload' | |
1849 | allows explicit control over the use of 'X'. | |
1850 | ||
1851 | For 64-bit targets, the memory packets ('M' and 'm') can now contain a | |
1852 | full 64-bit address. The command | |
1853 | ||
1854 | set remoteaddresssize 32 | |
1855 | ||
1856 | can be used to revert to the old behaviour. For existing remote stubs | |
1857 | the change should not be noticed, as the additional address information | |
1858 | will be discarded. | |
1859 | ||
1860 | In order to assist in debugging stubs, you may use the maintenance | |
1861 | command `packet' to send any text string to the stub. For instance, | |
1862 | ||
1863 | maint packet heythere | |
1864 | ||
1865 | sends the packet "$heythere#<checksum>". Note that it is very easy to | |
1866 | disrupt a debugging session by sending the wrong packet at the wrong | |
1867 | time. | |
1868 | ||
1869 | The compare-sections command allows you to compare section data on the | |
1870 | target to what is in the executable file without uploading or | |
1871 | downloading, by comparing CRC checksums. | |
1872 | ||
1873 | * Tracing can collect general expressions | |
1874 | ||
1875 | You may now collect general expressions at tracepoints. This requires | |
1876 | further additions to the target-side stub; see tracepoint.c and | |
1877 | doc/agentexpr.texi for further details. | |
1878 | ||
1879 | * mask-address variable for Mips | |
1880 | ||
1881 | For Mips targets, you may control the zeroing of the upper 32 bits of | |
1882 | a 64-bit address by entering `set mask-address on'. This is mainly | |
1883 | of interest to users of embedded R4xxx and R5xxx processors. | |
1884 | ||
1885 | * Higher serial baud rates | |
1886 | ||
1887 | GDB's serial code now allows you to specify baud rates 57600, 115200, | |
1888 | 230400, and 460800 baud. (Note that your host system may not be able | |
1889 | to achieve all of these rates.) | |
1890 | ||
1891 | * i960 simulator | |
1892 | ||
1893 | The i960 configuration now includes an initial implementation of a | |
1894 | builtin simulator, contributed by Jim Wilson. | |
1895 | ||
1896 | ||
1897 | *** Changes in GDB-4.17: | |
1898 | ||
1899 | * New native configurations | |
1900 | ||
1901 | Alpha GNU/Linux alpha*-*-linux* | |
1902 | Unixware 2.x i[3456]86-unixware2* | |
1903 | Irix 6.x mips*-sgi-irix6* | |
1904 | PowerPC GNU/Linux powerpc-*-linux* | |
1905 | PowerPC Solaris powerpcle-*-solaris* | |
1906 | Sparc GNU/Linux sparc-*-linux* | |
1907 | Motorola sysV68 R3V7.1 m68k-motorola-sysv | |
1908 | ||
1909 | * New targets | |
1910 | ||
1911 | Argonaut Risc Chip (ARC) arc-*-* | |
1912 | Hitachi H8/300S h8300*-*-* | |
1913 | Matsushita MN10200 w/simulator mn10200-*-* | |
1914 | Matsushita MN10300 w/simulator mn10300-*-* | |
1915 | MIPS NEC VR4100 mips64*vr4100*{,el}-*-elf* | |
1916 | MIPS NEC VR5000 mips64*vr5000*{,el}-*-elf* | |
1917 | MIPS Toshiba TX39 mips64*tx39*{,el}-*-elf* | |
1918 | Mitsubishi D10V w/simulator d10v-*-* | |
1919 | Mitsubishi M32R/D w/simulator m32r-*-elf* | |
1920 | Tsqware Sparclet sparclet-*-* | |
1921 | NEC V850 w/simulator v850-*-* | |
1922 | ||
1923 | * New debugging protocols | |
1924 | ||
1925 | ARM with RDI protocol arm*-*-* | |
1926 | M68K with dBUG monitor m68*-*-{aout,coff,elf} | |
1927 | DDB and LSI variants of PMON protocol mips*-*-* | |
1928 | PowerPC with DINK32 monitor powerpc{,le}-*-eabi | |
1929 | PowerPC with SDS protocol powerpc{,le}-*-eabi | |
1930 | Macraigor OCD (Wiggler) devices powerpc{,le}-*-eabi | |
1931 | ||
1932 | * DWARF 2 | |
1933 | ||
1934 | All configurations can now understand and use the DWARF 2 debugging | |
1935 | format. The choice is automatic, if the symbol file contains DWARF 2 | |
1936 | information. | |
1937 | ||
1938 | * Java frontend | |
1939 | ||
1940 | GDB now includes basic Java language support. This support is | |
1941 | only useful with Java compilers that produce native machine code. | |
1942 | ||
1943 | * solib-absolute-prefix and solib-search-path | |
1944 | ||
1945 | For SunOS and SVR4 shared libraries, you may now set the prefix for | |
1946 | loading absolute shared library symbol files, and the search path for | |
1947 | locating non-absolute shared library symbol files. | |
1948 | ||
1949 | * Live range splitting | |
1950 | ||
1951 | GDB can now effectively debug code for which GCC has performed live | |
1952 | range splitting as part of its optimization. See gdb/doc/LRS for | |
1953 | more details on the expected format of the stabs information. | |
1954 | ||
1955 | * Hurd support | |
1956 | ||
1957 | GDB's support for the GNU Hurd, including thread debugging, has been | |
1958 | updated to work with current versions of the Hurd. | |
1959 | ||
1960 | * ARM Thumb support | |
1961 | ||
1962 | GDB's ARM target configuration now handles the ARM7T (Thumb) 16-bit | |
1963 | instruction set. ARM GDB automatically detects when Thumb | |
1964 | instructions are in use, and adjusts disassembly and backtracing | |
1965 | accordingly. | |
1966 | ||
1967 | * MIPS16 support | |
1968 | ||
1969 | GDB's MIPS target configurations now handle the MIP16 16-bit | |
1970 | instruction set. | |
1971 | ||
1972 | * Overlay support | |
1973 | ||
1974 | GDB now includes support for overlays; if an executable has been | |
1975 | linked such that multiple sections are based at the same address, GDB | |
1976 | will decide which section to use for symbolic info. You can choose to | |
1977 | control the decision manually, using overlay commands, or implement | |
1978 | additional target-side support and use "overlay load-target" to bring | |
1979 | in the overlay mapping. Do "help overlay" for more detail. | |
1980 | ||
1981 | * info symbol | |
1982 | ||
1983 | The command "info symbol <address>" displays information about | |
1984 | the symbol at the specified address. | |
1985 | ||
1986 | * Trace support | |
1987 | ||
1988 | The standard remote protocol now includes an extension that allows | |
1989 | asynchronous collection and display of trace data. This requires | |
1990 | extensive support in the target-side debugging stub. Tracing mode | |
1991 | includes a new interaction mode in GDB and new commands: see the | |
1992 | file tracepoint.c for more details. | |
1993 | ||
1994 | * MIPS simulator | |
1995 | ||
1996 | Configurations for embedded MIPS now include a simulator contributed | |
1997 | by Cygnus Solutions. The simulator supports the instruction sets | |
1998 | of most MIPS variants. | |
1999 | ||
2000 | * Sparc simulator | |
2001 | ||
2002 | Sparc configurations may now include the ERC32 simulator contributed | |
2003 | by the European Space Agency. The simulator is not built into | |
2004 | Sparc targets by default; configure with --enable-sim to include it. | |
2005 | ||
2006 | * set architecture | |
2007 | ||
2008 | For target configurations that may include multiple variants of a | |
2009 | basic architecture (such as MIPS and SH), you may now set the | |
2010 | architecture explicitly. "set arch" sets, "info arch" lists | |
2011 | the possible architectures. | |
2012 | ||
2013 | *** Changes in GDB-4.16: | |
2014 | ||
2015 | * New native configurations | |
2016 | ||
2017 | Windows 95, x86 Windows NT i[345]86-*-cygwin32 | |
2018 | M68K NetBSD m68k-*-netbsd* | |
2019 | PowerPC AIX 4.x powerpc-*-aix* | |
2020 | PowerPC MacOS powerpc-*-macos* | |
2021 | PowerPC Windows NT powerpcle-*-cygwin32 | |
2022 | RS/6000 AIX 4.x rs6000-*-aix4* | |
2023 | ||
2024 | * New targets | |
2025 | ||
2026 | ARM with RDP protocol arm-*-* | |
2027 | I960 with MON960 i960-*-coff | |
2028 | MIPS VxWorks mips*-*-vxworks* | |
2029 | MIPS VR4300 with PMON mips64*vr4300{,el}-*-elf* | |
2030 | PowerPC with PPCBUG monitor powerpc{,le}-*-eabi* | |
2031 | Hitachi SH3 sh-*-* | |
2032 | Matra Sparclet sparclet-*-* | |
2033 | ||
2034 | * PowerPC simulator | |
2035 | ||
2036 | The powerpc-eabi configuration now includes the PSIM simulator, | |
2037 | contributed by Andrew Cagney, with assistance from Mike Meissner. | |
2038 | PSIM is a very elaborate model of the PowerPC, including not only | |
2039 | basic instruction set execution, but also details of execution unit | |
2040 | performance and I/O hardware. See sim/ppc/README for more details. | |
2041 | ||
2042 | * Solaris 2.5 | |
2043 | ||
2044 | GDB now works with Solaris 2.5. | |
2045 | ||
2046 | * Windows 95/NT native | |
2047 | ||
2048 | GDB will now work as a native debugger on Windows 95 and Windows NT. | |
2049 | To build it from source, you must use the "gnu-win32" environment, | |
2050 | which uses a DLL to emulate enough of Unix to run the GNU tools. | |
2051 | Further information, binaries, and sources are available at | |
2052 | ftp.cygnus.com, under pub/gnu-win32. | |
2053 | ||
2054 | * dont-repeat command | |
2055 | ||
2056 | If a user-defined command includes the command `dont-repeat', then the | |
2057 | command will not be repeated if the user just types return. This is | |
2058 | useful if the command is time-consuming to run, so that accidental | |
2059 | extra keystrokes don't run the same command many times. | |
2060 | ||
2061 | * Send break instead of ^C | |
2062 | ||
2063 | The standard remote protocol now includes an option to send a break | |
2064 | rather than a ^C to the target in order to interrupt it. By default, | |
2065 | GDB will send ^C; to send a break, set the variable `remotebreak' to 1. | |
2066 | ||
2067 | * Remote protocol timeout | |
2068 | ||
2069 | The standard remote protocol includes a new variable `remotetimeout' | |
2070 | that allows you to set the number of seconds before GDB gives up trying | |
2071 | to read from the target. The default value is 2. | |
2072 | ||
2073 | * Automatic tracking of dynamic object loading (HPUX and Solaris only) | |
2074 | ||
2075 | By default GDB will automatically keep track of objects as they are | |
2076 | loaded and unloaded by the dynamic linker. By using the command `set | |
2077 | stop-on-solib-events 1' you can arrange for GDB to stop the inferior | |
2078 | when shared library events occur, thus allowing you to set breakpoints | |
2079 | in shared libraries which are explicitly loaded by the inferior. | |
2080 | ||
2081 | Note this feature does not work on hpux8. On hpux9 you must link | |
2082 | /usr/lib/end.o into your program. This feature should work | |
2083 | automatically on hpux10. | |
2084 | ||
2085 | * Irix 5.x hardware watchpoint support | |
2086 | ||
2087 | Irix 5 configurations now support the use of hardware watchpoints. | |
2088 | ||
2089 | * Mips protocol "SYN garbage limit" | |
2090 | ||
2091 | When debugging a Mips target using the `target mips' protocol, you | |
2092 | may set the number of characters that GDB will ignore by setting | |
2093 | the `syn-garbage-limit'. A value of -1 means that GDB will ignore | |
2094 | every character. The default value is 1050. | |
2095 | ||
2096 | * Recording and replaying remote debug sessions | |
2097 | ||
2098 | If you set `remotelogfile' to the name of a file, gdb will write to it | |
2099 | a recording of a remote debug session. This recording may then be | |
2100 | replayed back to gdb using "gdbreplay". See gdbserver/README for | |
2101 | details. This is useful when you have a problem with GDB while doing | |
2102 | remote debugging; you can make a recording of the session and send it | |
2103 | to someone else, who can then recreate the problem. | |
2104 | ||
2105 | * Speedups for remote debugging | |
2106 | ||
2107 | GDB includes speedups for downloading and stepping MIPS systems using | |
2108 | the IDT monitor, fast downloads to the Hitachi SH E7000 emulator, | |
2109 | and more efficient S-record downloading. | |
2110 | ||
2111 | * Memory use reductions and statistics collection | |
2112 | ||
2113 | GDB now uses less memory and reports statistics about memory usage. | |
2114 | Try the `maint print statistics' command, for example. | |
2115 | ||
2116 | *** Changes in GDB-4.15: | |
2117 | ||
2118 | * Psymtabs for XCOFF | |
2119 | ||
2120 | The symbol reader for AIX GDB now uses partial symbol tables. This | |
2121 | can greatly improve startup time, especially for large executables. | |
2122 | ||
2123 | * Remote targets use caching | |
2124 | ||
2125 | Remote targets now use a data cache to speed up communication with the | |
2126 | remote side. The data cache could lead to incorrect results because | |
2127 | it doesn't know about volatile variables, thus making it impossible to | |
2128 | debug targets which use memory mapped I/O devices. `set remotecache | |
2129 | off' turns the the data cache off. | |
2130 | ||
2131 | * Remote targets may have threads | |
2132 | ||
2133 | The standard remote protocol now includes support for multiple threads | |
2134 | in the target system, using new protocol commands 'H' and 'T'. See | |
2135 | gdb/remote.c for details. | |
2136 | ||
2137 | * NetROM support | |
2138 | ||
2139 | If GDB is configured with `--enable-netrom', then it will include | |
2140 | support for the NetROM ROM emulator from XLNT Designs. The NetROM | |
2141 | acts as though it is a bank of ROM on the target board, but you can | |
2142 | write into it over the network. GDB's support consists only of | |
2143 | support for fast loading into the emulated ROM; to debug, you must use | |
2144 | another protocol, such as standard remote protocol. The usual | |
2145 | sequence is something like | |
2146 | ||
2147 | target nrom <netrom-hostname> | |
2148 | load <prog> | |
2149 | target remote <netrom-hostname>:1235 | |
2150 | ||
2151 | * Macintosh host | |
2152 | ||
2153 | GDB now includes support for the Apple Macintosh, as a host only. It | |
2154 | may be run as either an MPW tool or as a standalone application, and | |
2155 | it can debug through the serial port. All the usual GDB commands are | |
2156 | available, but to the target command, you must supply "serial" as the | |
2157 | device type instead of "/dev/ttyXX". See mpw-README in the main | |
2158 | directory for more information on how to build. The MPW configuration | |
2159 | scripts */mpw-config.in support only a few targets, and only the | |
2160 | mips-idt-ecoff target has been tested. | |
2161 | ||
2162 | * Autoconf | |
2163 | ||
2164 | GDB configuration now uses autoconf. This is not user-visible, | |
2165 | but does simplify configuration and building. | |
2166 | ||
2167 | * hpux10 | |
2168 | ||
2169 | GDB now supports hpux10. | |
2170 | ||
2171 | *** Changes in GDB-4.14: | |
2172 | ||
2173 | * New native configurations | |
2174 | ||
2175 | x86 FreeBSD i[345]86-*-freebsd | |
2176 | x86 NetBSD i[345]86-*-netbsd | |
2177 | NS32k NetBSD ns32k-*-netbsd | |
2178 | Sparc NetBSD sparc-*-netbsd | |
2179 | ||
2180 | * New targets | |
2181 | ||
2182 | A29K VxWorks a29k-*-vxworks | |
2183 | HP PA PRO embedded (WinBond W89K & Oki OP50N) hppa*-*-pro* | |
2184 | CPU32 EST-300 emulator m68*-*-est* | |
2185 | PowerPC ELF powerpc-*-elf | |
2186 | WDC 65816 w65-*-* | |
2187 | ||
2188 | * Alpha OSF/1 support for procfs | |
2189 | ||
2190 | GDB now supports procfs under OSF/1-2.x and higher, which makes it | |
2191 | possible to attach to running processes. As the mounting of the /proc | |
2192 | filesystem is optional on the Alpha, GDB automatically determines | |
2193 | the availability of /proc during startup. This can lead to problems | |
2194 | if /proc is unmounted after GDB has been started. | |
2195 | ||
2196 | * Arguments to user-defined commands | |
2197 | ||
2198 | User commands may accept up to 10 arguments separated by whitespace. | |
2199 | Arguments are accessed within the user command via $arg0..$arg9. A | |
2200 | trivial example: | |
2201 | define adder | |
2202 | print $arg0 + $arg1 + $arg2 | |
2203 | ||
2204 | To execute the command use: | |
2205 | adder 1 2 3 | |
2206 | ||
2207 | Defines the command "adder" which prints the sum of its three arguments. | |
2208 | Note the arguments are text substitutions, so they may reference variables, | |
2209 | use complex expressions, or even perform inferior function calls. | |
2210 | ||
2211 | * New `if' and `while' commands | |
2212 | ||
2213 | This makes it possible to write more sophisticated user-defined | |
2214 | commands. Both commands take a single argument, which is the | |
2215 | expression to evaluate, and must be followed by the commands to | |
2216 | execute, one per line, if the expression is nonzero, the list being | |
2217 | terminated by the word `end'. The `if' command list may include an | |
2218 | `else' word, which causes the following commands to be executed only | |
2219 | if the expression is zero. | |
2220 | ||
2221 | * Fortran source language mode | |
2222 | ||
2223 | GDB now includes partial support for Fortran 77. It will recognize | |
2224 | Fortran programs and can evaluate a subset of Fortran expressions, but | |
2225 | variables and functions may not be handled correctly. GDB will work | |
2226 | with G77, but does not yet know much about symbols emitted by other | |
2227 | Fortran compilers. | |
2228 | ||
2229 | * Better HPUX support | |
2230 | ||
2231 | Most debugging facilities now work on dynamic executables for HPPAs | |
2232 | running hpux9 or later. You can attach to running dynamically linked | |
2233 | processes, but by default the dynamic libraries will be read-only, so | |
2234 | for instance you won't be able to put breakpoints in them. To change | |
2235 | that behavior do the following before running the program: | |
2236 | ||
2237 | adb -w a.out | |
2238 | __dld_flags?W 0x5 | |
2239 | control-d | |
2240 | ||
2241 | This will cause the libraries to be mapped private and read-write. | |
2242 | To revert to the normal behavior, do this: | |
2243 | ||
2244 | adb -w a.out | |
2245 | __dld_flags?W 0x4 | |
2246 | control-d | |
2247 | ||
2248 | You cannot set breakpoints or examine data in the library until after | |
2249 | the library is loaded if the function/data symbols do not have | |
2250 | external linkage. | |
2251 | ||
2252 | GDB can now also read debug symbols produced by the HP C compiler on | |
2253 | HPPAs (sorry, no C++, Fortran or 68k support). | |
2254 | ||
2255 | * Target byte order now dynamically selectable | |
2256 | ||
2257 | You can choose which byte order to use with a target system, via the | |
2258 | commands "set endian big" and "set endian little", and you can see the | |
2259 | current setting by using "show endian". You can also give the command | |
2260 | "set endian auto", in which case GDB will use the byte order | |
2261 | associated with the executable. Currently, only embedded MIPS | |
2262 | configurations support dynamic selection of target byte order. | |
2263 | ||
2264 | * New DOS host serial code | |
2265 | ||
2266 | This version uses DPMI interrupts to handle buffered I/O, so you | |
2267 | no longer need to run asynctsr when debugging boards connected to | |
2268 | a PC's serial port. | |
2269 | ||
2270 | *** Changes in GDB-4.13: | |
2271 | ||
2272 | * New "complete" command | |
2273 | ||
2274 | This lists all the possible completions for the rest of the line, if it | |
2275 | were to be given as a command itself. This is intended for use by emacs. | |
2276 | ||
2277 | * Trailing space optional in prompt | |
2278 | ||
2279 | "set prompt" no longer adds a space for you after the prompt you set. This | |
2280 | allows you to set a prompt which ends in a space or one that does not. | |
2281 | ||
2282 | * Breakpoint hit counts | |
2283 | ||
2284 | "info break" now displays a count of the number of times the breakpoint | |
2285 | has been hit. This is especially useful in conjunction with "ignore"; you | |
2286 | can ignore a large number of breakpoint hits, look at the breakpoint info | |
2287 | to see how many times the breakpoint was hit, then run again, ignoring one | |
2288 | less than that number, and this will get you quickly to the last hit of | |
2289 | that breakpoint. | |
2290 | ||
2291 | * Ability to stop printing at NULL character | |
2292 | ||
2293 | "set print null-stop" will cause GDB to stop printing the characters of | |
2294 | an array when the first NULL is encountered. This is useful when large | |
2295 | arrays actually contain only short strings. | |
2296 | ||
2297 | * Shared library breakpoints | |
2298 | ||
2299 | In SunOS 4.x, SVR4, and Alpha OSF/1 configurations, you can now set | |
2300 | breakpoints in shared libraries before the executable is run. | |
2301 | ||
2302 | * Hardware watchpoints | |
2303 | ||
2304 | There is a new hardware breakpoint for the watch command for sparclite | |
2305 | targets. See gdb/sparclite/hw_breakpoint.note. | |
2306 | ||
55241689 | 2307 | Hardware watchpoints are also now supported under GNU/Linux. |
c906108c SS |
2308 | |
2309 | * Annotations | |
2310 | ||
2311 | Annotations have been added. These are for use with graphical interfaces, | |
2312 | and are still experimental. Currently only gdba.el uses these. | |
2313 | ||
2314 | * Improved Irix 5 support | |
2315 | ||
2316 | GDB now works properly with Irix 5.2. | |
2317 | ||
2318 | * Improved HPPA support | |
2319 | ||
2320 | GDB now works properly with the latest GCC and GAS. | |
2321 | ||
2322 | * New native configurations | |
2323 | ||
2324 | Sequent PTX4 i[34]86-sequent-ptx4 | |
2325 | HPPA running OSF/1 hppa*-*-osf* | |
2326 | Atari TT running SVR4 m68*-*-sysv4* | |
2327 | RS/6000 LynxOS rs6000-*-lynxos* | |
2328 | ||
2329 | * New targets | |
2330 | ||
2331 | OS/9000 i[34]86-*-os9k | |
2332 | MIPS R4000 mips64*{,el}-*-{ecoff,elf} | |
2333 | Sparc64 sparc64-*-* | |
2334 | ||
2335 | * Hitachi SH7000 and E7000-PC ICE support | |
2336 | ||
2337 | There is now support for communicating with the Hitachi E7000-PC ICE. | |
2338 | This is available automatically when GDB is configured for the SH. | |
2339 | ||
2340 | * Fixes | |
2341 | ||
2342 | As usual, a variety of small fixes and improvements, both generic | |
2343 | and configuration-specific. See the ChangeLog for more detail. | |
2344 | ||
2345 | *** Changes in GDB-4.12: | |
2346 | ||
2347 | * Irix 5 is now supported | |
2348 | ||
2349 | * HPPA support | |
2350 | ||
2351 | GDB-4.12 on the HPPA has a number of changes which make it unable | |
2352 | to debug the output from the currently released versions of GCC and | |
2353 | GAS (GCC 2.5.8 and GAS-2.2 or PAGAS-1.36). Until the next major release | |
2354 | of GCC and GAS, versions of these tools designed to work with GDB-4.12 | |
2355 | can be retrieved via anonymous ftp from jaguar.cs.utah.edu:/dist. | |
2356 | ||
2357 | ||
2358 | *** Changes in GDB-4.11: | |
2359 | ||
2360 | * User visible changes: | |
2361 | ||
2362 | * Remote Debugging | |
2363 | ||
2364 | The "set remotedebug" option is now consistent between the mips remote | |
2365 | target, remote targets using the gdb-specific protocol, UDI (AMD's | |
2366 | debug protocol for the 29k) and the 88k bug monitor. It is now an | |
2367 | integer specifying a debug level (normally 0 or 1, but 2 means more | |
2368 | debugging info for the mips target). | |
2369 | ||
2370 | * DEC Alpha native support | |
2371 | ||
2372 | GDB now works on the DEC Alpha. GCC 2.4.5 does not produce usable | |
2373 | debug info, but GDB works fairly well with the DEC compiler and should | |
2374 | work with a future GCC release. See the README file for a few | |
2375 | Alpha-specific notes. | |
2376 | ||
2377 | * Preliminary thread implementation | |
2378 | ||
2379 | GDB now has preliminary thread support for both SGI/Irix and LynxOS. | |
2380 | ||
2381 | * LynxOS native and target support for 386 | |
2382 | ||
2383 | This release has been hosted on LynxOS 2.2, and also can be configured | |
2384 | to remotely debug programs running under LynxOS (see gdb/gdbserver/README | |
2385 | for details). | |
2386 | ||
2387 | * Improvements in C++ mangling/demangling. | |
2388 | ||
2389 | This release has much better g++ debugging, specifically in name | |
2390 | mangling/demangling, virtual function calls, print virtual table, | |
2391 | call methods, ...etc. | |
2392 | ||
2393 | *** Changes in GDB-4.10: | |
2394 | ||
2395 | * User visible changes: | |
2396 | ||
2397 | Remote debugging using the GDB-specific (`target remote') protocol now | |
2398 | supports the `load' command. This is only useful if you have some | |
2399 | other way of getting the stub to the target system, and you can put it | |
2400 | somewhere in memory where it won't get clobbered by the download. | |
2401 | ||
2402 | Filename completion now works. | |
2403 | ||
2404 | When run under emacs mode, the "info line" command now causes the | |
2405 | arrow to point to the line specified. Also, "info line" prints | |
2406 | addresses in symbolic form (as well as hex). | |
2407 | ||
2408 | All vxworks based targets now support a user settable option, called | |
2409 | vxworks-timeout. This option represents the number of seconds gdb | |
2410 | should wait for responses to rpc's. You might want to use this if | |
2411 | your vxworks target is, perhaps, a slow software simulator or happens | |
2412 | to be on the far side of a thin network line. | |
2413 | ||
2414 | * DEC alpha support | |
2415 | ||
2416 | This release contains support for using a DEC alpha as a GDB host for | |
2417 | cross debugging. Native alpha debugging is not supported yet. | |
2418 | ||
2419 | ||
2420 | *** Changes in GDB-4.9: | |
2421 | ||
2422 | * Testsuite | |
2423 | ||
2424 | This is the first GDB release which is accompanied by a matching testsuite. | |
2425 | The testsuite requires installation of dejagnu, which should be available | |
2426 | via ftp from most sites that carry GNU software. | |
2427 | ||
2428 | * C++ demangling | |
2429 | ||
2430 | 'Cfront' style demangling has had its name changed to 'ARM' style, to | |
2431 | emphasize that it was written from the specifications in the C++ Annotated | |
2432 | Reference Manual, not necessarily to be compatible with AT&T cfront. Despite | |
2433 | disclaimers, it still generated too much confusion with users attempting to | |
2434 | use gdb with AT&T cfront. | |
2435 | ||
2436 | * Simulators | |
2437 | ||
2438 | GDB now uses a standard remote interface to a simulator library. | |
2439 | So far, the library contains simulators for the Zilog Z8001/2, the | |
2440 | Hitachi H8/300, H8/500 and Super-H. | |
2441 | ||
2442 | * New targets supported | |
2443 | ||
2444 | H8/300 simulator h8300-hitachi-hms or h8300hms | |
2445 | H8/500 simulator h8500-hitachi-hms or h8500hms | |
2446 | SH simulator sh-hitachi-hms or sh | |
2447 | Z8000 simulator z8k-zilog-none or z8ksim | |
2448 | IDT MIPS board over serial line mips-idt-ecoff | |
2449 | ||
2450 | Cross-debugging to GO32 targets is supported. It requires a custom | |
2451 | version of the i386-stub.c module which is integrated with the | |
2452 | GO32 memory extender. | |
2453 | ||
2454 | * New remote protocols | |
2455 | ||
2456 | MIPS remote debugging protocol. | |
2457 | ||
2458 | * New source languages supported | |
2459 | ||
2460 | This version includes preliminary support for Chill, a Pascal like language | |
2461 | used by telecommunications companies. Chill support is also being integrated | |
2462 | into the GNU compiler, but we don't know when it will be publically available. | |
2463 | ||
2464 | ||
2465 | *** Changes in GDB-4.8: | |
2466 | ||
2467 | * HP Precision Architecture supported | |
2468 | ||
2469 | GDB now supports HP PA-RISC machines running HPUX. A preliminary | |
2470 | version of this support was available as a set of patches from the | |
2471 | University of Utah. GDB does not support debugging of programs | |
2472 | compiled with the HP compiler, because HP will not document their file | |
2473 | format. Instead, you must use GCC (version 2.3.2 or later) and PA-GAS | |
2474 | (as available from jaguar.cs.utah.edu:/dist/pa-gas.u4.tar.Z). | |
2475 | ||
2476 | Many problems in the preliminary version have been fixed. | |
2477 | ||
2478 | * Faster and better demangling | |
2479 | ||
2480 | We have improved template demangling and fixed numerous bugs in the GNU style | |
2481 | demangler. It can now handle type modifiers such as `static' or `const'. Wide | |
2482 | character types (wchar_t) are now supported. Demangling of each symbol is now | |
2483 | only done once, and is cached when the symbol table for a file is read in. | |
2484 | This results in a small increase in memory usage for C programs, a moderate | |
2485 | increase in memory usage for C++ programs, and a fantastic speedup in | |
2486 | symbol lookups. | |
2487 | ||
2488 | `Cfront' style demangling still doesn't work with AT&T cfront. It was written | |
2489 | from the specifications in the Annotated Reference Manual, which AT&T's | |
2490 | compiler does not actually implement. | |
2491 | ||
2492 | * G++ multiple inheritance compiler problem | |
2493 | ||
2494 | In the 2.3.2 release of gcc/g++, how the compiler resolves multiple | |
2495 | inheritance lattices was reworked to properly discover ambiguities. We | |
2496 | recently found an example which causes this new algorithm to fail in a | |
2497 | very subtle way, producing bad debug information for those classes. | |
2498 | The file 'gcc.patch' (in this directory) can be applied to gcc to | |
2499 | circumvent the problem. A future GCC release will contain a complete | |
2500 | fix. | |
2501 | ||
2502 | The previous G++ debug info problem (mentioned below for the gdb-4.7 | |
2503 | release) is fixed in gcc version 2.3.2. | |
2504 | ||
2505 | * Improved configure script | |
2506 | ||
2507 | The `configure' script will now attempt to guess your system type if | |
2508 | you don't supply a host system type. The old scheme of supplying a | |
2509 | host system triplet is preferable over using this. All the magic is | |
2510 | done in the new `config.guess' script. Examine it for details. | |
2511 | ||
2512 | We have also brought our configure script much more in line with the FSF's | |
2513 | version. It now supports the --with-xxx options. In particular, | |
2514 | `--with-minimal-bfd' can be used to make the GDB binary image smaller. | |
2515 | The resulting GDB will not be able to read arbitrary object file formats -- | |
2516 | only the format ``expected'' to be used on the configured target system. | |
2517 | We hope to make this the default in a future release. | |
2518 | ||
2519 | * Documentation improvements | |
2520 | ||
2521 | There's new internal documentation on how to modify GDB, and how to | |
2522 | produce clean changes to the code. We implore people to read it | |
2523 | before submitting changes. | |
2524 | ||
2525 | The GDB manual uses new, sexy Texinfo conditionals, rather than arcane | |
2526 | M4 macros. The new texinfo.tex is provided in this release. Pre-built | |
2527 | `info' files are also provided. To build `info' files from scratch, | |
2528 | you will need the latest `makeinfo' release, which will be available in | |
2529 | a future texinfo-X.Y release. | |
2530 | ||
2531 | *NOTE* The new texinfo.tex can cause old versions of TeX to hang. | |
2532 | We're not sure exactly which versions have this problem, but it has | |
2533 | been seen in 3.0. We highly recommend upgrading to TeX version 3.141 | |
2534 | or better. If that isn't possible, there is a patch in | |
2535 | `texinfo/tex3patch' that will modify `texinfo/texinfo.tex' to work | |
2536 | around this problem. | |
2537 | ||
2538 | * New features | |
2539 | ||
2540 | GDB now supports array constants that can be used in expressions typed in by | |
2541 | the user. The syntax is `{element, element, ...}'. Ie: you can now type | |
2542 | `print {1, 2, 3}', and it will build up an array in memory malloc'd in | |
2543 | the target program. | |
2544 | ||
2545 | The new directory `gdb/sparclite' contains a program that demonstrates | |
2546 | how the sparc-stub.c remote stub runs on a Fujitsu SPARClite processor. | |
2547 | ||
2548 | * New native hosts supported | |
2549 | ||
2550 | HP/PA-RISC under HPUX using GNU tools hppa1.1-hp-hpux | |
2551 | 386 CPUs running SCO Unix 3.2v4 i386-unknown-sco3.2v4 | |
2552 | ||
2553 | * New targets supported | |
2554 | ||
2555 | AMD 29k family via UDI a29k-amd-udi or udi29k | |
2556 | ||
2557 | * New file formats supported | |
2558 | ||
2559 | BFD now supports reading HP/PA-RISC executables (SOM file format?), | |
2560 | HPUX core files, and SCO 3.2v2 core files. | |
2561 | ||
2562 | * Major bug fixes | |
2563 | ||
2564 | Attaching to processes now works again; thanks for the many bug reports. | |
2565 | ||
2566 | We have also stomped on a bunch of core dumps caused by | |
2567 | printf_filtered("%s") problems. | |
2568 | ||
2569 | We eliminated a copyright problem on the rpc and ptrace header files | |
2570 | for VxWorks, which was discovered at the last minute during the 4.7 | |
2571 | release. You should now be able to build a VxWorks GDB. | |
2572 | ||
2573 | You can now interrupt gdb while an attached process is running. This | |
2574 | will cause the attached process to stop, and give control back to GDB. | |
2575 | ||
2576 | We fixed problems caused by using too many file descriptors | |
2577 | for reading symbols from object files and libraries. This was | |
2578 | especially a problem for programs that used many (~100) shared | |
2579 | libraries. | |
2580 | ||
2581 | The `step' command now only enters a subroutine if there is line number | |
2582 | information for the subroutine. Otherwise it acts like the `next' | |
2583 | command. Previously, `step' would enter subroutines if there was | |
2584 | any debugging information about the routine. This avoids problems | |
2585 | when using `cc -g1' on MIPS machines. | |
2586 | ||
2587 | * Internal improvements | |
2588 | ||
2589 | GDB's internal interfaces have been improved to make it easier to support | |
2590 | debugging of multiple languages in the future. | |
2591 | ||
2592 | GDB now uses a common structure for symbol information internally. | |
2593 | Minimal symbols (derived from linkage symbols in object files), partial | |
2594 | symbols (from a quick scan of debug information), and full symbols | |
2595 | contain a common subset of information, making it easier to write | |
2596 | shared code that handles any of them. | |
2597 | ||
2598 | * New command line options | |
2599 | ||
2600 | We now accept --silent as an alias for --quiet. | |
2601 | ||
2602 | * Mmalloc licensing | |
2603 | ||
2604 | The memory-mapped-malloc library is now licensed under the GNU Library | |
2605 | General Public License. | |
2606 | ||
2607 | *** Changes in GDB-4.7: | |
2608 | ||
2609 | * Host/native/target split | |
2610 | ||
2611 | GDB has had some major internal surgery to untangle the support for | |
2612 | hosts and remote targets. Now, when you configure GDB for a remote | |
2613 | target, it will no longer load in all of the support for debugging | |
2614 | local programs on the host. When fully completed and tested, this will | |
2615 | ensure that arbitrary host/target combinations are possible. | |
2616 | ||
2617 | The primary conceptual shift is to separate the non-portable code in | |
2618 | GDB into three categories. Host specific code is required any time GDB | |
2619 | is compiled on that host, regardless of the target. Target specific | |
2620 | code relates to the peculiarities of the target, but can be compiled on | |
2621 | any host. Native specific code is everything else: it can only be | |
2622 | built when the host and target are the same system. Child process | |
2623 | handling and core file support are two common `native' examples. | |
2624 | ||
2625 | GDB's use of /proc for controlling Unix child processes is now cleaner. | |
2626 | It has been split out into a single module under the `target_ops' vector, | |
2627 | plus two native-dependent functions for each system that uses /proc. | |
2628 | ||
2629 | * New hosts supported | |
2630 | ||
2631 | HP/Apollo 68k (under the BSD domain) m68k-apollo-bsd or apollo68bsd | |
2632 | 386 CPUs running various BSD ports i386-unknown-bsd or 386bsd | |
2633 | 386 CPUs running SCO Unix i386-unknown-scosysv322 or i386sco | |
2634 | ||
2635 | * New targets supported | |
2636 | ||
2637 | Fujitsu SPARClite sparclite-fujitsu-none or sparclite | |
2638 | 68030 and CPU32 m68030-*-*, m68332-*-* | |
2639 | ||
2640 | * New native hosts supported | |
2641 | ||
2642 | 386 CPUs running various BSD ports i386-unknown-bsd or 386bsd | |
2643 | (386bsd is not well tested yet) | |
2644 | 386 CPUs running SCO Unix i386-unknown-scosysv322 or sco | |
2645 | ||
2646 | * New file formats supported | |
2647 | ||
2648 | BFD now supports COFF files for the Zilog Z8000 microprocessor. It | |
2649 | supports reading of `a.out.adobe' object files, which are an a.out | |
2650 | format extended with minimal information about multiple sections. | |
2651 | ||
2652 | * New commands | |
2653 | ||
2654 | `show copying' is the same as the old `info copying'. | |
2655 | `show warranty' is the same as `info warrantee'. | |
2656 | These were renamed for consistency. The old commands continue to work. | |
2657 | ||
2658 | `info handle' is a new alias for `info signals'. | |
2659 | ||
2660 | You can now define pre-command hooks, which attach arbitrary command | |
2661 | scripts to any command. The commands in the hook will be executed | |
2662 | prior to the user's command. You can also create a hook which will be | |
2663 | executed whenever the program stops. See gdb.texinfo. | |
2664 | ||
2665 | * C++ improvements | |
2666 | ||
2667 | We now deal with Cfront style name mangling, and can even extract type | |
2668 | info from mangled symbols. GDB can automatically figure out which | |
2669 | symbol mangling style your C++ compiler uses. | |
2670 | ||
2671 | Calling of methods and virtual functions has been improved as well. | |
2672 | ||
2673 | * Major bug fixes | |
2674 | ||
2675 | The crash that occured when debugging Sun Ansi-C compiled binaries is | |
2676 | fixed. This was due to mishandling of the extra N_SO stabs output | |
2677 | by the compiler. | |
2678 | ||
2679 | We also finally got Ultrix 4.2 running in house, and fixed core file | |
2680 | support, with help from a dozen people on the net. | |
2681 | ||
2682 | John M. Farrell discovered that the reason that single-stepping was so | |
2683 | slow on all of the Mips based platforms (primarily SGI and DEC) was | |
2684 | that we were trying to demangle and lookup a symbol used for internal | |
2685 | purposes on every instruction that was being stepped through. Changing | |
2686 | the name of that symbol so that it couldn't be mistaken for a C++ | |
2687 | mangled symbol sped things up a great deal. | |
2688 | ||
2689 | Rich Pixley sped up symbol lookups in general by getting much smarter | |
2690 | about when C++ symbol mangling is necessary. This should make symbol | |
2691 | completion (TAB on the command line) much faster. It's not as fast as | |
2692 | we'd like, but it's significantly faster than gdb-4.6. | |
2693 | ||
2694 | * AMD 29k support | |
2695 | ||
2696 | A new user controllable variable 'call_scratch_address' can | |
2697 | specify the location of a scratch area to be used when GDB | |
2698 | calls a function in the target. This is necessary because the | |
2699 | usual method of putting the scratch area on the stack does not work | |
2700 | in systems that have separate instruction and data spaces. | |
2701 | ||
2702 | We integrated changes to support the 29k UDI (Universal Debugger | |
2703 | Interface), but discovered at the last minute that we didn't have all | |
2704 | of the appropriate copyright paperwork. We are working with AMD to | |
2705 | resolve this, and hope to have it available soon. | |
2706 | ||
2707 | * Remote interfaces | |
2708 | ||
2709 | We have sped up the remote serial line protocol, especially for targets | |
2710 | with lots of registers. It now supports a new `expedited status' ('T') | |
2711 | message which can be used in place of the existing 'S' status message. | |
2712 | This allows the remote stub to send only the registers that GDB | |
2713 | needs to make a quick decision about single-stepping or conditional | |
2714 | breakpoints, eliminating the need to fetch the entire register set for | |
2715 | each instruction being stepped through. | |
2716 | ||
2717 | The GDB remote serial protocol now implements a write-through cache for | |
2718 | registers, only re-reading the registers if the target has run. | |
2719 | ||
2720 | There is also a new remote serial stub for SPARC processors. You can | |
2721 | find it in gdb-4.7/gdb/sparc-stub.c. This was written to support the | |
2722 | Fujitsu SPARClite processor, but will run on any stand-alone SPARC | |
2723 | processor with a serial port. | |
2724 | ||
2725 | * Configuration | |
2726 | ||
2727 | Configure.in files have become much easier to read and modify. A new | |
2728 | `table driven' format makes it more obvious what configurations are | |
2729 | supported, and what files each one uses. | |
2730 | ||
2731 | * Library changes | |
2732 | ||
2733 | There is a new opcodes library which will eventually contain all of the | |
2734 | disassembly routines and opcode tables. At present, it only contains | |
2735 | Sparc and Z8000 routines. This will allow the assembler, debugger, and | |
2736 | disassembler (binutils/objdump) to share these routines. | |
2737 | ||
2738 | The libiberty library is now copylefted under the GNU Library General | |
2739 | Public License. This allows more liberal use, and was done so libg++ | |
2740 | can use it. This makes no difference to GDB, since the Library License | |
2741 | grants all the rights from the General Public License. | |
2742 | ||
2743 | * Documentation | |
2744 | ||
2745 | The file gdb-4.7/gdb/doc/stabs.texinfo is a (relatively) complete | |
2746 | reference to the stabs symbol info used by the debugger. It is (as far | |
2747 | as we know) the only published document on this fascinating topic. We | |
2748 | encourage you to read it, compare it to the stabs information on your | |
2749 | system, and send improvements on the document in general (to | |
2750 | bug-gdb@prep.ai.mit.edu). | |
2751 | ||
2752 | And, of course, many bugs have been fixed. | |
2753 | ||
2754 | ||
2755 | *** Changes in GDB-4.6: | |
2756 | ||
2757 | * Better support for C++ function names | |
2758 | ||
2759 | GDB now accepts as input the "demangled form" of C++ overloaded function | |
2760 | names and member function names, and can do command completion on such names | |
2761 | (using TAB, TAB-TAB, and ESC-?). The names have to be quoted with a pair of | |
2762 | single quotes. Examples are 'func (int, long)' and 'obj::operator==(obj&)'. | |
2763 | Make use of command completion, it is your friend. | |
2764 | ||
2765 | GDB also now accepts a variety of C++ mangled symbol formats. They are | |
2766 | the GNU g++ style, the Cfront (ARM) style, and the Lucid (lcc) style. | |
2767 | You can tell GDB which format to use by doing a 'set demangle-style {gnu, | |
2768 | lucid, cfront, auto}'. 'gnu' is the default. Do a 'set demangle-style foo' | |
2769 | for the list of formats. | |
2770 | ||
2771 | * G++ symbol mangling problem | |
2772 | ||
2773 | Recent versions of gcc have a bug in how they emit debugging information for | |
2774 | C++ methods (when using dbx-style stabs). The file 'gcc.patch' (in this | |
2775 | directory) can be applied to gcc to fix the problem. Alternatively, if you | |
2776 | can't fix gcc, you can #define GCC_MANGLE_BUG when compling gdb/symtab.c. The | |
2777 | usual symptom is difficulty with setting breakpoints on methods. GDB complains | |
2778 | about the method being non-existent. (We believe that version 2.2.2 of GCC has | |
2779 | this problem.) | |
2780 | ||
2781 | * New 'maintenance' command | |
2782 | ||
2783 | All of the commands related to hacking GDB internals have been moved out of | |
2784 | the main command set, and now live behind the 'maintenance' command. This | |
2785 | can also be abbreviated as 'mt'. The following changes were made: | |
2786 | ||
2787 | dump-me -> maintenance dump-me | |
2788 | info all-breakpoints -> maintenance info breakpoints | |
2789 | printmsyms -> maintenance print msyms | |
2790 | printobjfiles -> maintenance print objfiles | |
2791 | printpsyms -> maintenance print psymbols | |
2792 | printsyms -> maintenance print symbols | |
2793 | ||
2794 | The following commands are new: | |
2795 | ||
2796 | maintenance demangle Call internal GDB demangler routine to | |
2797 | demangle a C++ link name and prints the result. | |
2798 | maintenance print type Print a type chain for a given symbol | |
2799 | ||
2800 | * Change to .gdbinit file processing | |
2801 | ||
2802 | We now read the $HOME/.gdbinit file before processing the argv arguments | |
2803 | (e.g. reading symbol files or core files). This allows global parameters to | |
2804 | be set, which will apply during the symbol reading. The ./.gdbinit is still | |
2805 | read after argv processing. | |
2806 | ||
2807 | * New hosts supported | |
2808 | ||
2809 | Solaris-2.0 !!! sparc-sun-solaris2 or sun4sol2 | |
2810 | ||
55241689 | 2811 | GNU/Linux support i386-unknown-linux or linux |
c906108c SS |
2812 | |
2813 | We are also including code to support the HP/PA running BSD and HPUX. This | |
2814 | is almost guaranteed not to work, as we didn't have time to test or build it | |
2815 | for this release. We are including it so that the more adventurous (or | |
2816 | masochistic) of you can play with it. We also had major problems with the | |
2817 | fact that the compiler that we got from HP doesn't support the -g option. | |
2818 | It costs extra. | |
2819 | ||
2820 | * New targets supported | |
2821 | ||
2822 | Hitachi H8/300 h8300-hitachi-hms or h8300hms | |
2823 | ||
2824 | * More smarts about finding #include files | |
2825 | ||
2826 | GDB now remembers the compilation directory for all include files, and for | |
2827 | all files from which C is generated (like yacc and lex sources). This | |
2828 | greatly improves GDB's ability to find yacc/lex sources, and include files, | |
2829 | especially if you are debugging your program from a directory different from | |
2830 | the one that contains your sources. | |
2831 | ||
2832 | We also fixed a bug which caused difficulty with listing and setting | |
2833 | breakpoints in include files which contain C code. (In the past, you had to | |
2834 | try twice in order to list an include file that you hadn't looked at before.) | |
2835 | ||
2836 | * Interesting infernals change | |
2837 | ||
2838 | GDB now deals with arbitrary numbers of sections, where the symbols for each | |
2839 | section must be relocated relative to that section's landing place in the | |
2840 | target's address space. This work was needed to support ELF with embedded | |
2841 | stabs used by Solaris-2.0. | |
2842 | ||
2843 | * Bug fixes (of course!) | |
2844 | ||
2845 | There have been loads of fixes for the following things: | |
2846 | mips, rs6000, 29k/udi, m68k, g++, type handling, elf/dwarf, m88k, | |
2847 | i960, stabs, DOS(GO32), procfs, etc... | |
2848 | ||
2849 | See the ChangeLog for details. | |
2850 | ||
2851 | *** Changes in GDB-4.5: | |
2852 | ||
2853 | * New machines supported (host and target) | |
2854 | ||
2855 | IBM RS6000 running AIX rs6000-ibm-aix or rs6000 | |
2856 | ||
2857 | SGI Irix-4.x mips-sgi-irix4 or iris4 | |
2858 | ||
2859 | * New malloc package | |
2860 | ||
2861 | GDB now uses a new memory manager called mmalloc, based on gmalloc. | |
2862 | Mmalloc is capable of handling mutiple heaps of memory. It is also | |
2863 | capable of saving a heap to a file, and then mapping it back in later. | |
2864 | This can be used to greatly speedup the startup of GDB by using a | |
2865 | pre-parsed symbol table which lives in a mmalloc managed heap. For | |
2866 | more details, please read mmalloc/mmalloc.texi. | |
2867 | ||
2868 | * info proc | |
2869 | ||
2870 | The 'info proc' command (SVR4 only) has been enhanced quite a bit. See | |
2871 | 'help info proc' for details. | |
2872 | ||
2873 | * MIPS ecoff symbol table format | |
2874 | ||
2875 | The code that reads MIPS symbol table format is now supported on all hosts. | |
2876 | Thanks to MIPS for releasing the sym.h and symconst.h files to make this | |
2877 | possible. | |
2878 | ||
2879 | * File name changes for MS-DOS | |
2880 | ||
2881 | Many files in the config directories have been renamed to make it easier to | |
2882 | support GDB on MS-DOSe systems (which have very restrictive file name | |
2883 | conventions :-( ). MS-DOSe host support (under DJ Delorie's GO32 | |
2884 | environment) is close to working but has some remaining problems. Note | |
2885 | that debugging of DOS programs is not supported, due to limitations | |
2886 | in the ``operating system'', but it can be used to host cross-debugging. | |
2887 | ||
2888 | * Cross byte order fixes | |
2889 | ||
2890 | Many fixes have been made to support cross debugging of Sparc and MIPS | |
2891 | targets from hosts whose byte order differs. | |
2892 | ||
2893 | * New -mapped and -readnow options | |
2894 | ||
2895 | If memory-mapped files are available on your system through the 'mmap' | |
2896 | system call, you can use the -mapped option on the `file' or | |
2897 | `symbol-file' commands to cause GDB to write the symbols from your | |
2898 | program into a reusable file. If the program you are debugging is | |
2899 | called `/path/fred', the mapped symbol file will be `./fred.syms'. | |
2900 | Future GDB debugging sessions will notice the presence of this file, | |
2901 | and will quickly map in symbol information from it, rather than reading | |
2902 | the symbol table from the executable program. Using the '-mapped' | |
2903 | option in a GDB `file' or `symbol-file' command has the same effect as | |
2904 | starting GDB with the '-mapped' command-line option. | |
2905 | ||
2906 | You can cause GDB to read the entire symbol table immediately by using | |
2907 | the '-readnow' option with any of the commands that load symbol table | |
2908 | information (or on the GDB command line). This makes the command | |
2909 | slower, but makes future operations faster. | |
2910 | ||
2911 | The -mapped and -readnow options are typically combined in order to | |
2912 | build a `fred.syms' file that contains complete symbol information. | |
2913 | A simple GDB invocation to do nothing but build a `.syms' file for future | |
2914 | use is: | |
2915 | ||
2916 | gdb -batch -nx -mapped -readnow programname | |
2917 | ||
2918 | The `.syms' file is specific to the host machine on which GDB is run. | |
2919 | It holds an exact image of GDB's internal symbol table. It cannot be | |
2920 | shared across multiple host platforms. | |
2921 | ||
2922 | * longjmp() handling | |
2923 | ||
2924 | GDB is now capable of stepping and nexting over longjmp(), _longjmp(), and | |
2925 | siglongjmp() without losing control. This feature has not yet been ported to | |
2926 | all systems. It currently works on many 386 platforms, all MIPS-based | |
2927 | platforms (SGI, DECstation, etc), and Sun3/4. | |
2928 | ||
2929 | * Solaris 2.0 | |
2930 | ||
2931 | Preliminary work has been put in to support the new Solaris OS from Sun. At | |
2932 | this time, it can control and debug processes, but it is not capable of | |
2933 | reading symbols. | |
2934 | ||
2935 | * Bug fixes | |
2936 | ||
2937 | As always, many many bug fixes. The major areas were with g++, and mipsread. | |
2938 | People using the MIPS-based platforms should experience fewer mysterious | |
2939 | crashes and trashed symbol tables. | |
2940 | ||
2941 | *** Changes in GDB-4.4: | |
2942 | ||
2943 | * New machines supported (host and target) | |
2944 | ||
2945 | SCO Unix on i386 IBM PC clones i386-sco-sysv or i386sco | |
2946 | (except core files) | |
2947 | BSD Reno on Vax vax-dec-bsd | |
2948 | Ultrix on Vax vax-dec-ultrix | |
2949 | ||
2950 | * New machines supported (target) | |
2951 | ||
2952 | AMD 29000 embedded, using EBMON a29k-none-none | |
2953 | ||
2954 | * C++ support | |
2955 | ||
2956 | GDB continues to improve its handling of C++. `References' work better. | |
2957 | The demangler has also been improved, and now deals with symbols mangled as | |
2958 | per the Annotated C++ Reference Guide. | |
2959 | ||
2960 | GDB also now handles `stabs' symbol information embedded in MIPS | |
2961 | `ecoff' symbol tables. Since the ecoff format was not easily | |
2962 | extensible to handle new languages such as C++, this appeared to be a | |
2963 | good way to put C++ debugging info into MIPS binaries. This option | |
2964 | will be supported in the GNU C compiler, version 2, when it is | |
2965 | released. | |
2966 | ||
2967 | * New features for SVR4 | |
2968 | ||
2969 | GDB now handles SVR4 shared libraries, in the same fashion as SunOS | |
2970 | shared libraries. Debugging dynamically linked programs should present | |
2971 | only minor differences from debugging statically linked programs. | |
2972 | ||
2973 | The `info proc' command will print out information about any process | |
2974 | on an SVR4 system (including the one you are debugging). At the moment, | |
2975 | it prints the address mappings of the process. | |
2976 | ||
2977 | If you bring up GDB on another SVR4 system, please send mail to | |
2978 | bug-gdb@prep.ai.mit.edu to let us know what changes were reqired (if any). | |
2979 | ||
2980 | * Better dynamic linking support in SunOS | |
2981 | ||
2982 | Reading symbols from shared libraries which contain debugging symbols | |
2983 | now works properly. However, there remain issues such as automatic | |
2984 | skipping of `transfer vector' code during function calls, which | |
2985 | make it harder to debug code in a shared library, than to debug the | |
2986 | same code linked statically. | |
2987 | ||
2988 | * New Getopt | |
2989 | ||
2990 | GDB is now using the latest `getopt' routines from the FSF. This | |
2991 | version accepts the -- prefix for options with long names. GDB will | |
2992 | continue to accept the old forms (-option and +option) as well. | |
2993 | Various single letter abbreviations for options have been explicity | |
2994 | added to the option table so that they won't get overshadowed in the | |
2995 | future by other options that begin with the same letter. | |
2996 | ||
2997 | * Bugs fixed | |
2998 | ||
2999 | The `cleanup_undefined_types' bug that many of you noticed has been squashed. | |
3000 | Many assorted bugs have been handled. Many more remain to be handled. | |
3001 | See the various ChangeLog files (primarily in gdb and bfd) for details. | |
3002 | ||
3003 | ||
3004 | *** Changes in GDB-4.3: | |
3005 | ||
3006 | * New machines supported (host and target) | |
3007 | ||
3008 | Amiga 3000 running Amix m68k-cbm-svr4 or amix | |
3009 | NCR 3000 386 running SVR4 i386-ncr-svr4 or ncr3000 | |
3010 | Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88 | |
3011 | ||
3012 | * Almost SCO Unix support | |
3013 | ||
3014 | We had hoped to support: | |
3015 | SCO Unix on i386 IBM PC clones i386-sco-sysv or i386sco | |
3016 | (except for core file support), but we discovered very late in the release | |
3017 | that it has problems with process groups that render gdb unusable. Sorry | |
3018 | about that. I encourage people to fix it and post the fixes. | |
3019 | ||
3020 | * Preliminary ELF and DWARF support | |
3021 | ||
3022 | GDB can read ELF object files on System V Release 4, and can handle | |
3023 | debugging records for C, in DWARF format, in ELF files. This support | |
3024 | is preliminary. If you bring up GDB on another SVR4 system, please | |
3025 | send mail to bug-gdb@prep.ai.mit.edu to let us know what changes were | |
3026 | reqired (if any). | |
3027 | ||
3028 | * New Readline | |
3029 | ||
3030 | GDB now uses the latest `readline' library. One user-visible change | |
3031 | is that two tabs will list possible command completions, which previously | |
3032 | required typing M-? (meta-question mark, or ESC ?). | |
3033 | ||
3034 | * Bugs fixed | |
3035 | ||
3036 | The `stepi' bug that many of you noticed has been squashed. | |
3037 | Many bugs in C++ have been handled. Many more remain to be handled. | |
3038 | See the various ChangeLog files (primarily in gdb and bfd) for details. | |
3039 | ||
3040 | * State of the MIPS world (in case you wondered): | |
3041 | ||
3042 | GDB can understand the symbol tables emitted by the compilers | |
3043 | supplied by most vendors of MIPS-based machines, including DEC. These | |
3044 | symbol tables are in a format that essentially nobody else uses. | |
3045 | ||
3046 | Some versions of gcc come with an assembler post-processor called | |
3047 | mips-tfile. This program is required if you want to do source-level | |
3048 | debugging of gcc-compiled programs. I believe FSF does not ship | |
3049 | mips-tfile with gcc version 1, but it will eventually come with gcc | |
3050 | version 2. | |
3051 | ||
3052 | Debugging of g++ output remains a problem. g++ version 1.xx does not | |
3053 | really support it at all. (If you're lucky, you should be able to get | |
3054 | line numbers and stack traces to work, but no parameters or local | |
3055 | variables.) With some work it should be possible to improve the | |
3056 | situation somewhat. | |
3057 | ||
3058 | When gcc version 2 is released, you will have somewhat better luck. | |
3059 | However, even then you will get confusing results for inheritance and | |
3060 | methods. | |
3061 | ||
3062 | We will eventually provide full debugging of g++ output on | |
3063 | DECstations. This will probably involve some kind of stabs-in-ecoff | |
3064 | encapulation, but the details have not been worked out yet. | |
3065 | ||
3066 | ||
3067 | *** Changes in GDB-4.2: | |
3068 | ||
3069 | * Improved configuration | |
3070 | ||
3071 | Only one copy of `configure' exists now, and it is not self-modifying. | |
3072 | Porting BFD is simpler. | |
3073 | ||
3074 | * Stepping improved | |
3075 | ||
3076 | The `step' and `next' commands now only stop at the first instruction | |
3077 | of a source line. This prevents the multiple stops that used to occur | |
3078 | in switch statements, for-loops, etc. `Step' continues to stop if a | |
3079 | function that has debugging information is called within the line. | |
3080 | ||
3081 | * Bug fixing | |
3082 | ||
3083 | Lots of small bugs fixed. More remain. | |
3084 | ||
3085 | * New host supported (not target) | |
3086 | ||
3087 | Intel 386 PC clone running Mach i386-none-mach | |
3088 | ||
3089 | ||
3090 | *** Changes in GDB-4.1: | |
3091 | ||
3092 | * Multiple source language support | |
3093 | ||
3094 | GDB now has internal scaffolding to handle several source languages. | |
3095 | It determines the type of each source file from its filename extension, | |
3096 | and will switch expression parsing and number formatting to match the | |
3097 | language of the function in the currently selected stack frame. | |
3098 | You can also specifically set the language to be used, with | |
3099 | `set language c' or `set language modula-2'. | |
3100 | ||
3101 | * GDB and Modula-2 | |
3102 | ||
3103 | GDB now has preliminary support for the GNU Modula-2 compiler, | |
3104 | currently under development at the State University of New York at | |
3105 | Buffalo. Development of both GDB and the GNU Modula-2 compiler will | |
3106 | continue through the fall of 1991 and into 1992. | |
3107 | ||
3108 | Other Modula-2 compilers are currently not supported, and attempting to | |
3109 | debug programs compiled with them will likely result in an error as the | |
3110 | symbol table is read. Feel free to work on it, though! | |
3111 | ||
3112 | There are hooks in GDB for strict type checking and range checking, | |
3113 | in the `Modula-2 philosophy', but they do not currently work. | |
3114 | ||
3115 | * set write on/off | |
3116 | ||
3117 | GDB can now write to executable and core files (e.g. patch | |
3118 | a variable's value). You must turn this switch on, specify | |
3119 | the file ("exec foo" or "core foo"), *then* modify it, e.g. | |
3120 | by assigning a new value to a variable. Modifications take | |
3121 | effect immediately. | |
3122 | ||
3123 | * Automatic SunOS shared library reading | |
3124 | ||
3125 | When you run your program, GDB automatically determines where its | |
3126 | shared libraries (if any) have been loaded, and reads their symbols. | |
3127 | The `share' command is no longer needed. This also works when | |
3128 | examining core files. | |
3129 | ||
3130 | * set listsize | |
3131 | ||
3132 | You can specify the number of lines that the `list' command shows. | |
3133 | The default is 10. | |
3134 | ||
3135 | * New machines supported (host and target) | |
3136 | ||
3137 | SGI Iris (MIPS) running Irix V3: mips-sgi-irix or iris | |
3138 | Sony NEWS (68K) running NEWSOS 3.x: m68k-sony-sysv or news | |
3139 | Ultracomputer (29K) running Sym1: a29k-nyu-sym1 or ultra3 | |
3140 | ||
3141 | * New hosts supported (not targets) | |
3142 | ||
3143 | IBM RT/PC: romp-ibm-aix or rtpc | |
3144 | ||
3145 | * New targets supported (not hosts) | |
3146 | ||
3147 | AMD 29000 embedded with COFF a29k-none-coff | |
3148 | AMD 29000 embedded with a.out a29k-none-aout | |
3149 | Ultracomputer remote kernel debug a29k-nyu-kern | |
3150 | ||
3151 | * New remote interfaces | |
3152 | ||
3153 | AMD 29000 Adapt | |
3154 | AMD 29000 Minimon | |
3155 | ||
3156 | ||
3157 | *** Changes in GDB-4.0: | |
3158 | ||
3159 | * New Facilities | |
3160 | ||
3161 | Wide output is wrapped at good places to make the output more readable. | |
3162 | ||
3163 | Gdb now supports cross-debugging from a host machine of one type to a | |
3164 | target machine of another type. Communication with the target system | |
3165 | is over serial lines. The ``target'' command handles connecting to the | |
3166 | remote system; the ``load'' command will download a program into the | |
3167 | remote system. Serial stubs for the m68k and i386 are provided. Gdb | |
3168 | also supports debugging of realtime processes running under VxWorks, | |
3169 | using SunRPC Remote Procedure Calls over TCP/IP to talk to a debugger | |
3170 | stub on the target system. | |
3171 | ||
3172 | New CPUs supported include the AMD 29000 and Intel 960. | |
3173 | ||
3174 | GDB now reads object files and symbol tables via a ``binary file'' | |
3175 | library, which allows a single copy of GDB to debug programs of multiple | |
3176 | object file types such as a.out and coff. | |
3177 | ||
3178 | There is now a GDB reference card in "doc/refcard.tex". (Make targets | |
3179 | refcard.dvi and refcard.ps are available to format it). | |
3180 | ||
3181 | ||
3182 | * Control-Variable user interface simplified | |
3183 | ||
3184 | All variables that control the operation of the debugger can be set | |
3185 | by the ``set'' command, and displayed by the ``show'' command. | |
3186 | ||
3187 | For example, ``set prompt new-gdb=>'' will change your prompt to new-gdb=>. | |
3188 | ``Show prompt'' produces the response: | |
3189 | Gdb's prompt is new-gdb=>. | |
3190 | ||
3191 | What follows are the NEW set commands. The command ``help set'' will | |
3192 | print a complete list of old and new set commands. ``help set FOO'' | |
3193 | will give a longer description of the variable FOO. ``show'' will show | |
3194 | all of the variable descriptions and their current settings. | |
3195 | ||
3196 | confirm on/off: Enables warning questions for operations that are | |
3197 | hard to recover from, e.g. rerunning the program while | |
3198 | it is already running. Default is ON. | |
3199 | ||
3200 | editing on/off: Enables EMACS style command line editing | |
3201 | of input. Previous lines can be recalled with | |
3202 | control-P, the current line can be edited with control-B, | |
3203 | you can search for commands with control-R, etc. | |
3204 | Default is ON. | |
3205 | ||
3206 | history filename NAME: NAME is where the gdb command history | |
3207 | will be stored. The default is .gdb_history, | |
3208 | or the value of the environment variable | |
3209 | GDBHISTFILE. | |
3210 | ||
3211 | history size N: The size, in commands, of the command history. The | |
3212 | default is 256, or the value of the environment variable | |
3213 | HISTSIZE. | |
3214 | ||
3215 | history save on/off: If this value is set to ON, the history file will | |
3216 | be saved after exiting gdb. If set to OFF, the | |
3217 | file will not be saved. The default is OFF. | |
3218 | ||
3219 | history expansion on/off: If this value is set to ON, then csh-like | |
3220 | history expansion will be performed on | |
3221 | command line input. The default is OFF. | |
3222 | ||
3223 | radix N: Sets the default radix for input and output. It can be set | |
3224 | to 8, 10, or 16. Note that the argument to "radix" is interpreted | |
3225 | in the current radix, so "set radix 10" is always a no-op. | |
3226 | ||
3227 | height N: This integer value is the number of lines on a page. Default | |
3228 | is 24, the current `stty rows'' setting, or the ``li#'' | |
3229 | setting from the termcap entry matching the environment | |
3230 | variable TERM. | |
3231 | ||
3232 | width N: This integer value is the number of characters on a line. | |
3233 | Default is 80, the current `stty cols'' setting, or the ``co#'' | |
3234 | setting from the termcap entry matching the environment | |
3235 | variable TERM. | |
3236 | ||
3237 | Note: ``set screensize'' is obsolete. Use ``set height'' and | |
3238 | ``set width'' instead. | |
3239 | ||
3240 | print address on/off: Print memory addresses in various command displays, | |
3241 | such as stack traces and structure values. Gdb looks | |
3242 | more ``symbolic'' if you turn this off; it looks more | |
3243 | ``machine level'' with it on. Default is ON. | |
3244 | ||
3245 | print array on/off: Prettyprint arrays. New convenient format! Default | |
3246 | is OFF. | |
3247 | ||
3248 | print demangle on/off: Print C++ symbols in "source" form if on, | |
3249 | "raw" form if off. | |
3250 | ||
3251 | print asm-demangle on/off: Same, for assembler level printouts | |
3252 | like instructions. | |
3253 | ||
3254 | print vtbl on/off: Prettyprint C++ virtual function tables. Default is OFF. | |
3255 | ||
3256 | ||
3257 | * Support for Epoch Environment. | |
3258 | ||
3259 | The epoch environment is a version of Emacs v18 with windowing. One | |
3260 | new command, ``inspect'', is identical to ``print'', except that if you | |
3261 | are running in the epoch environment, the value is printed in its own | |
3262 | window. | |
3263 | ||
3264 | ||
3265 | * Support for Shared Libraries | |
3266 | ||
3267 | GDB can now debug programs and core files that use SunOS shared libraries. | |
3268 | Symbols from a shared library cannot be referenced | |
3269 | before the shared library has been linked with the program (this | |
3270 | happens after you type ``run'' and before the function main() is entered). | |
3271 | At any time after this linking (including when examining core files | |
3272 | from dynamically linked programs), gdb reads the symbols from each | |
3273 | shared library when you type the ``sharedlibrary'' command. | |
3274 | It can be abbreviated ``share''. | |
3275 | ||
3276 | sharedlibrary REGEXP: Load shared object library symbols for files | |
3277 | matching a unix regular expression. No argument | |
3278 | indicates to load symbols for all shared libraries. | |
3279 | ||
3280 | info sharedlibrary: Status of loaded shared libraries. | |
3281 | ||
3282 | ||
3283 | * Watchpoints | |
3284 | ||
3285 | A watchpoint stops execution of a program whenever the value of an | |
3286 | expression changes. Checking for this slows down execution | |
3287 | tremendously whenever you are in the scope of the expression, but is | |
3288 | quite useful for catching tough ``bit-spreader'' or pointer misuse | |
3289 | problems. Some machines such as the 386 have hardware for doing this | |
3290 | more quickly, and future versions of gdb will use this hardware. | |
3291 | ||
3292 | watch EXP: Set a watchpoint (breakpoint) for an expression. | |
3293 | ||
3294 | info watchpoints: Information about your watchpoints. | |
3295 | ||
3296 | delete N: Deletes watchpoint number N (same as breakpoints). | |
3297 | disable N: Temporarily turns off watchpoint number N (same as breakpoints). | |
3298 | enable N: Re-enables watchpoint number N (same as breakpoints). | |
3299 | ||
3300 | ||
3301 | * C++ multiple inheritance | |
3302 | ||
3303 | When used with a GCC version 2 compiler, GDB supports multiple inheritance | |
3304 | for C++ programs. | |
3305 | ||
3306 | * C++ exception handling | |
3307 | ||
3308 | Gdb now supports limited C++ exception handling. Besides the existing | |
3309 | ability to breakpoint on an exception handler, gdb can breakpoint on | |
3310 | the raising of an exception (before the stack is peeled back to the | |
3311 | handler's context). | |
3312 | ||
3313 | catch FOO: If there is a FOO exception handler in the dynamic scope, | |
3314 | set a breakpoint to catch exceptions which may be raised there. | |
3315 | Multiple exceptions (``catch foo bar baz'') may be caught. | |
3316 | ||
3317 | info catch: Lists all exceptions which may be caught in the | |
3318 | current stack frame. | |
3319 | ||
3320 | ||
3321 | * Minor command changes | |
3322 | ||
3323 | The command ``call func (arg, arg, ...)'' now acts like the print | |
3324 | command, except it does not print or save a value if the function's result | |
3325 | is void. This is similar to dbx usage. | |
3326 | ||
3327 | The ``up'' and ``down'' commands now always print the frame they end up | |
3328 | at; ``up-silently'' and `down-silently'' can be used in scripts to change | |
3329 | frames without printing. | |
3330 | ||
3331 | * New directory command | |
3332 | ||
3333 | 'dir' now adds directories to the FRONT of the source search path. | |
3334 | The path starts off empty. Source files that contain debug information | |
3335 | about the directory in which they were compiled can be found even | |
3336 | with an empty path; Sun CC and GCC include this information. If GDB can't | |
3337 | find your source file in the current directory, type "dir .". | |
3338 | ||
3339 | * Configuring GDB for compilation | |
3340 | ||
3341 | For normal use, type ``./configure host''. See README or gdb.texinfo | |
3342 | for more details. | |
3343 | ||
3344 | GDB now handles cross debugging. If you are remotely debugging between | |
3345 | two different machines, type ``./configure host -target=targ''. | |
3346 | Host is the machine where GDB will run; targ is the machine | |
3347 | where the program that you are debugging will run. |