ChangeLog:
[deliverable/binutils-gdb.git] / gdb / NEWS
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1 What has changed in GDB?
2 (Organized release by release)
3
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4*** Changes since GDB 7.2
5
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6* New command line options
7
8-data-directory DIR Specify DIR as the "data-directory".
9 This is mostly for testing purposes.
10
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11* The "maint set python auto-load on|off" command has been renamed to
12 "set auto-load-scripts on|off".
13
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14* GDB has a new command: "set directories".
15 It is like the "dir" command except that it replaces the
16 source path list instead of augmenting it.
17
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18* OpenCL C
19 Initial support for the OpenCL C language (http://www.khronos.org/opencl)
20 has been integrated into GDB.
21
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22* Python scripting
23
24 ** GDB values in Python are now callable if the value represents a
25 function. For example, if 'some_value' represents a function that
26 takes two integer parameters and returns a value, you can call
27 that function like so:
28
29 result = some_value (10,20)
30
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31 ** Module gdb.types has been added.
32 It contains a collection of utilities for working with gdb.Types objects:
33 get_basic_type, has_field, make_enum_dict.
34
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35 ** Module gdb.printing has been added.
36 It contains utilities for writing and registering pretty-printers.
37 New classes: PrettyPrinter, SubPrettyPrinter,
38 RegexpCollectionPrettyPrinter.
39 New function: register_pretty_printer.
40
41 ** New commands "info pretty-printers", "enable pretty-printer" and
42 "disable pretty-printer" have been added.
43
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44 ** gdb.parameter("directories") is now available.
45
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46* C++ Improvements:
47
48 ** GDB now puts template parameters in scope when debugging in an
49 instantiation. For example, if you have:
50
51 template<int X> int func (void) { return X; }
52
53 then if you step into func<5>, "print X" will show "5". This
54 feature requires proper debuginfo support from the compiler; it
55 was added to GCC 4.5.
56
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57 ** The motion commands "next", "finish", "until", and "advance" now
58 work better when exceptions are thrown. In particular, GDB will
59 no longer lose control of the inferior; instead, the GDB will
60 stop the inferior at the point at which the exception is caught.
61 This functionality requires a change in the exception handling
62 code that was introduced in GCC 4.5.
63
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64* GDB now follows GCC's rules on accessing volatile objects when
65 reading or writing target state during expression evaluation.
66 One notable difference to prior behavior is that "print x = 0"
67 no longer generates a read of x; the value of the assignment is
68 now always taken directly from the value being assigned.
69
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70* GDB now has some support for using labels in the program's source in
71 linespecs. For instance, you can use "advance label" to continue
72 execution to a label.
73
74* GDB now has support for reading and writing a new .gdb_index
75 section. This section holds a fast index of DWARF debugging
76 information and can be used to greatly speed up GDB startup and
77 operation. See the documentation for `save gdb-index' for details.
78
b56df873 79* The "watch" command now accepts an optional "-location" argument.
14c0d4e1 80 When used, this causes GDB to watch the memory referred to by the
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81 expression. Such a watchpoint is never deleted due to it going out
82 of scope.
83
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84* GDB now supports thread debugging of core dumps on GNU/Linux.
85
86 GDB now activates thread debugging using the libthread_db library
87 when debugging GNU/Linux core dumps, similarly to when debugging
88 live processes. As a result, when debugging a core dump file, GDB
89 is now able to display pthread_t ids of threads. For example, "info
90 threads" shows the same output as when debugging the process when it
91 was live. In earlier releases, you'd see something like this:
92
93 (gdb) info threads
94 * 1 LWP 6780 main () at main.c:10
95
96 While now you see this:
97
98 (gdb) info threads
99 * 1 Thread 0x7f0f5712a700 (LWP 6780) main () at main.c:10
100
101 It is also now possible to inspect TLS variables when debugging core
102 dumps.
103
104 When debugging a core dump generated on a machine other than the one
105 used to run GDB, you may need to point GDB at the correct
106 libthread_db library with the "set libthread-db-search-path"
107 command. See the user manual for more details on this command.
108
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109* New features in the GDB remote stub, GDBserver
110
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111 ** GDBserver is now supported on PowerPC LynxOS (versions 4.x and 5.x),
112 and i686 LynxOS (version 5.x).
248c9dbc 113
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114 ** GDBserver is now supported on Blackfin Linux.
115
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116* New targets:
117
118Analog Devices, Inc. Blackfin Processor bfin-*
119
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120* Ada task switching is now supported on sparc-elf targets when
121 debugging a program using the Ravenscar Profile. For more information,
122 see the "Tasking Support when using the Ravenscar Profile" section
123 in the GDB user manual.
124
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125* Guile support was removed.
126
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127* New features in the GNU simulator
128
129 ** The --map-info flag lists all known core mappings.
130
76b8507d 131*** Changes in GDB 7.2
bfbf3774 132
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133* Shared library support for remote targets by default
134
135 When GDB is configured for a generic, non-OS specific target, like
136 for example, --target=arm-eabi or one of the many *-*-elf targets,
137 GDB now queries remote stubs for loaded shared libraries using the
138 `qXfer:libraries:read' packet. Previously, shared library support
139 was always disabled for such configurations.
140
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141* C++ Improvements:
142
143 ** Argument Dependent Lookup (ADL)
144
145 In C++ ADL lookup directs function search to the namespaces of its
146 arguments even if the namespace has not been imported.
147 For example:
148 namespace A
149 {
150 class B { };
151 void foo (B) { }
152 }
153 ...
154 A::B b
155 foo(b)
156 Here the compiler will search for `foo' in the namespace of 'b'
157 and find A::foo. GDB now supports this. This construct is commonly
158 used in the Standard Template Library for operators.
159
160 ** Improved User Defined Operator Support
161
162 In addition to member operators, GDB now supports lookup of operators
163 defined in a namespace and imported with a `using' directive, operators
164 defined in the global scope, operators imported implicitly from an
165 anonymous namespace, and the ADL operators mentioned in the previous
166 entry.
167 GDB now also supports proper overload resolution for all the previously
168 mentioned flavors of operators.
169
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170 ** static const class members
171
172 Printing of static const class members that are initialized in the
173 class definition has been fixed.
174
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175* Windows Thread Information Block access.
176
177 On Windows targets, GDB now supports displaying the Windows Thread
178 Information Block (TIB) structure. This structure is visible either
179 by using the new command `info w32 thread-information-block' or, by
180 dereferencing the new convenience variable named `$_tlb', a
181 thread-specific pointer to the TIB. This feature is also supported
182 when remote debugging using GDBserver.
183
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184* Static tracepoints
185
186 Static tracepoints are calls in the user program into a tracing
187 library. One such library is a port of the LTTng kernel tracer to
188 userspace --- UST (LTTng Userspace Tracer, http://lttng.org/ust).
189 When debugging with GDBserver, GDB now supports combining the GDB
190 tracepoint machinery with such libraries. For example: the user can
191 use GDB to probe a static tracepoint marker (a call from the user
192 program into the tracing library) with the new "strace" command (see
193 "New commands" below). This creates a "static tracepoint" in the
194 breakpoint list, that can be manipulated with the same feature set
195 as fast and regular tracepoints. E.g., collect registers, local and
196 global variables, collect trace state variables, and define
197 tracepoint conditions. In addition, the user can collect extra
198 static tracepoint marker specific data, by collecting the new
199 $_sdata internal variable. When analyzing the trace buffer, you can
200 inspect $_sdata like any other variable available to GDB. For more
201 information, see the "Tracepoints" chapter in GDB user manual. New
202 remote packets have been defined to support static tracepoints, see
203 the "New remote packets" section below.
204
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205* Better reconstruction of tracepoints after disconnected tracing
206
207 GDB will attempt to download the original source form of tracepoint
208 definitions when starting a trace run, and then will upload these
209 upon reconnection to the target, resulting in a more accurate
210 reconstruction of the tracepoints that are in use on the target.
211
212* Observer mode
213
214 You can now exercise direct control over the ways that GDB can
215 affect your program. For instance, you can disallow the setting of
216 breakpoints, so that the program can run continuously (assuming
217 non-stop mode). In addition, the "observer" variable is available
218 to switch all of the different controls; in observer mode, GDB
219 cannot affect the target's behavior at all, which is useful for
220 tasks like diagnosing live systems in the field.
221
222* The new convenience variable $_thread holds the number of the
223 current thread.
224
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225* New remote packets
226
227qGetTIBAddr
228
229 Return the address of the Windows Thread Information Block of a given thread.
230
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231qRelocInsn
232
233 In response to several of the tracepoint packets, the target may now
234 also respond with a number of intermediate `qRelocInsn' request
235 packets before the final result packet, to have GDB handle
236 relocating an instruction to execute at a different address. This
237 is particularly useful for stubs that support fast tracepoints. GDB
238 reports support for this feature in the qSupported packet.
239
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240qTfSTM, qTsSTM
241
242 List static tracepoint markers in the target program.
243
244qTSTMat
245
246 List static tracepoint markers at a given address in the target
247 program.
248
249qXfer:statictrace:read
250
251 Read the static trace data collected (by a `collect $_sdata'
252 tracepoint action). The remote stub reports support for this packet
253 to gdb's qSupported query.
254
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255QAllow
256
257 Send the current settings of GDB's permission flags.
258
259QTDPsrc
260
261 Send part of the source (textual) form of a tracepoint definition,
262 which includes location, conditional, and action list.
263
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264* The source command now accepts a -s option to force searching for the
265 script in the source search path even if the script name specifies
266 a directory.
267
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268* New features in the GDB remote stub, GDBserver
269
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270 - GDBserver now support tracepoints (including fast tracepoints, and
271 static tracepoints). The feature is currently supported by the
272 i386-linux and amd64-linux builds. See the "Tracepoints support
273 in gdbserver" section in the manual for more information.
274
275 GDBserver JIT compiles the tracepoint's conditional agent
276 expression bytecode into native code whenever possible for low
277 overhead dynamic tracepoints conditionals. For such tracepoints,
278 an expression that examines program state is evaluated when the
279 tracepoint is reached, in order to determine whether to capture
280 trace data. If the condition is simple and false, processing the
281 tracepoint finishes very quickly and no data is gathered.
282
283 GDBserver interfaces with the UST (LTTng Userspace Tracer) library
284 for static tracepoints support.
d337e9f0 285
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286 - GDBserver now supports x86_64 Windows 64-bit debugging.
287
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288* GDB now sends xmlRegisters= in qSupported packet to indicate that
289 it understands register description.
290
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291* The --batch flag now disables pagination and queries.
292
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293* X86 general purpose registers
294
295 GDB now supports reading/writing byte, word and double-word x86
296 general purpose registers directly. This means you can use, say,
297 $ah or $ax to refer, respectively, to the byte register AH and
298 16-bit word register AX that are actually portions of the 32-bit
299 register EAX or 64-bit register RAX.
300
95a42b64 301* The `commands' command now accepts a range of breakpoints to modify.
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302 A plain `commands' following a command that creates multiple
303 breakpoints affects all the breakpoints set by that command. This
304 applies to breakpoints set by `rbreak', and also applies when a
305 single `break' command creates multiple breakpoints (e.g.,
306 breakpoints on overloaded c++ functions).
95a42b64 307
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308* The `rbreak' command now accepts a filename specification as part of
309 its argument, limiting the functions selected by the regex to those
310 in the specified file.
311
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312* Support for remote debugging Windows and SymbianOS shared libraries
313 from Unix hosts has been improved. Non Windows GDB builds now can
314 understand target reported file names that follow MS-DOS based file
315 system semantics, such as file names that include drive letters and
316 use the backslash character as directory separator. This makes it
317 possible to transparently use the "set sysroot" and "set
318 solib-search-path" on Unix hosts to point as host copies of the
319 target's shared libraries. See the new command "set
320 target-file-system-kind" described below, and the "Commands to
321 specify files" section in the user manual for more information.
322
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323* New commands
324
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325eval template, expressions...
326 Convert the values of one or more expressions under the control
327 of the string template to a command line, and call it.
328
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329set target-file-system-kind unix|dos-based|auto
330show target-file-system-kind
331 Set or show the assumed file system kind for target reported file
332 names.
333
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334save breakpoints <filename>
335 Save all current breakpoint definitions to a file suitable for use
336 in a later debugging session. To read the saved breakpoint
337 definitions, use the `source' command.
338
339`save tracepoints' is a new alias for `save-tracepoints'. The latter
340is now deprecated.
341
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342info static-tracepoint-markers
343 Display information about static tracepoint markers in the target.
344
345strace FN | FILE:LINE | *ADDR | -m MARKER_ID
346 Define a static tracepoint by probing a marker at the given
347 function, line, address, or marker ID.
348
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349set observer on|off
350show observer
351 Enable and disable observer mode.
352
353set may-write-registers on|off
354set may-write-memory on|off
355set may-insert-breakpoints on|off
356set may-insert-tracepoints on|off
357set may-insert-fast-tracepoints on|off
358set may-interrupt on|off
359 Set individual permissions for GDB effects on the target. Note that
360 some of these settings can have undesirable or surprising
361 consequences, particularly when changed in the middle of a session.
362 For instance, disabling the writing of memory can prevent
363 breakpoints from being inserted, cause single-stepping to fail, or
364 even crash your program, if you disable after breakpoints have been
365 inserted. However, GDB should not crash.
366
367set record memory-query on|off
368show record memory-query
369 Control whether to stop the inferior if memory changes caused
370 by an instruction cannot be recorded.
371
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372* Changed commands
373
374disassemble
375 The disassemble command now supports "start,+length" form of two arguments.
376
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377* Python scripting
378
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379** GDB now provides a new directory location, called the python directory,
380 where Python scripts written for GDB can be installed. The location
381 of that directory is <data-directory>/python, where <data-directory>
382 is the GDB data directory. For more details, see section `Scripting
383 GDB using Python' in the manual.
384
adc36818 385** The GDB Python API now has access to breakpoints, symbols, symbol
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386 tables, program spaces, inferiors, threads and frame's code blocks.
387 Additionally, GDB Parameters can now be created from the API, and
388 manipulated via set/show in the CLI.
f870a310 389
fa33c3cd 390** New functions gdb.target_charset, gdb.target_wide_charset,
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391 gdb.progspaces, gdb.current_progspace, and gdb.string_to_argv.
392
393** New exception gdb.GdbError.
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394
395** Pretty-printers are now also looked up in the current program space.
f3e9a817 396
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397** Pretty-printers can now be individually enabled and disabled.
398
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399** GDB now looks for names of Python scripts to auto-load in a
400 special section named `.debug_gdb_scripts', in addition to looking
401 for a OBJFILE-gdb.py script when OBJFILE is read by the debugger.
402
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403* Tracepoint actions were unified with breakpoint commands. In particular,
404there are no longer differences in "info break" output for breakpoints and
405tracepoints and the "commands" command can be used for both tracepoints and
406regular breakpoints.
407
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408* New targets
409
410ARM Symbian arm*-*-symbianelf*
411
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412* D language support.
413 GDB now supports debugging programs written in the D programming
414 language.
415
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416* GDB now supports the extended ptrace interface for PowerPC which is
417 available since Linux kernel version 2.6.34. This automatically enables
418 any hardware breakpoints and additional hardware watchpoints available in
419 the processor. The old ptrace interface exposes just one hardware
420 watchpoint and no hardware breakpoints.
421
422* GDB is now able to use the Data Value Compare (DVC) register available on
423 embedded PowerPC processors to implement in hardware simple watchpoint
424 conditions of the form:
425
426 watch ADDRESS|VARIABLE if ADDRESS|VARIABLE == CONSTANT EXPRESSION
427
428 This works in native GDB running on Linux kernels with the extended ptrace
429 interface mentioned above.
430
bfbf3774 431*** Changes in GDB 7.1
abc7453d 432
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433* C++ Improvements
434
435 ** Namespace Support
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436
437 GDB now supports importing of namespaces in C++. This enables the
438 user to inspect variables from imported namespaces. Support for
439 namepace aliasing has also been added. So, if a namespace is
440 aliased in the current scope (e.g. namepace C=A; ) the user can
441 print variables using the alias (e.g. (gdb) print C::x).
442
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443 ** Bug Fixes
444
445 All known bugs relating to the printing of virtual base class were
446 fixed. It is now possible to call overloaded static methods using a
447 qualified name.
448
449 ** Cast Operators
450
451 The C++ cast operators static_cast<>, dynamic_cast<>, const_cast<>,
452 and reinterpret_cast<> are now handled by the C++ expression parser.
453
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454* New targets
455
456Xilinx MicroBlaze microblaze-*-*
34207b9e 457Renesas RX rx-*-elf
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458
459* New Simulators
460
461Xilinx MicroBlaze microblaze
34207b9e 462Renesas RX rx
2d1c1221 463
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464* Multi-program debugging.
465
466 GDB now has support for multi-program (a.k.a. multi-executable or
467 multi-exec) debugging. This allows for debugging multiple inferiors
468 simultaneously each running a different program under the same GDB
469 session. See "Debugging Multiple Inferiors and Programs" in the
470 manual for more information. This implied some user visible changes
471 in the multi-inferior support. For example, "info inferiors" now
472 lists inferiors that are not running yet or that have exited
473 already. See also "New commands" and "New options" below.
474
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475* New tracing features
476
477 GDB's tracepoint facility now includes several new features:
478
479 ** Trace state variables
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480
481 GDB tracepoints now include support for trace state variables, which
482 are variables managed by the target agent during a tracing
483 experiment. They are useful for tracepoints that trigger each
484 other, so for instance one tracepoint can count hits in a variable,
485 and then a second tracepoint has a condition that is true when the
486 count reaches a particular value. Trace state variables share the
487 $-syntax of GDB convenience variables, and can appear in both
488 tracepoint actions and condition expressions. Use the "tvariable"
489 command to create, and "info tvariables" to view; see "Trace State
490 Variables" in the manual for more detail.
7a697b8d 491
d5551862 492 ** Fast tracepoints
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493
494 GDB now includes an option for defining fast tracepoints, which
495 targets may implement more efficiently, such as by installing a jump
496 into the target agent rather than a trap instruction. The resulting
497 speedup can be by two orders of magnitude or more, although the
498 tradeoff is that some program locations on some target architectures
499 might not allow fast tracepoint installation, for instance if the
500 instruction to be replaced is shorter than the jump. To request a
501 fast tracepoint, use the "ftrace" command, with syntax identical to
502 the regular trace command.
503
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504 ** Disconnected tracing
505
506 It is now possible to detach GDB from the target while it is running
507 a trace experiment, then reconnect later to see how the experiment
508 is going. In addition, a new variable disconnected-tracing lets you
509 tell the target agent whether to continue running a trace if the
510 connection is lost unexpectedly.
511
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512 ** Trace files
513
514 GDB now has the ability to save the trace buffer into a file, and
515 then use that file as a target, similarly to you can do with
516 corefiles. You can select trace frames, print data that was
517 collected in them, and use tstatus to display the state of the
518 tracing run at the moment that it was saved. To create a trace
519 file, use "tsave <filename>", and to use it, do "target tfile
520 <name>".
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521
522 ** Circular trace buffer
523
524 You can ask the target agent to handle the trace buffer as a
525 circular buffer, discarding the oldest trace frames to make room for
526 newer ones, by setting circular-trace-buffer to on. This feature may
527 not be available for all target agents.
528
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529* Changed commands
530
531disassemble
532 The disassemble command, when invoked with two arguments, now requires
533 the arguments to be comma-separated.
534
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535info variables
536 The info variables command now displays variable definitions. Files
537 which only declare a variable are not shown.
538
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539source
540 The source command is now capable of sourcing Python scripts.
541 This feature is dependent on the debugger being build with Python
542 support.
543
544 Related to this enhancement is also the introduction of a new command
545 "set script-extension" (see below).
546
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547* New commands (for set/show, see "New options" below)
548
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549record save [<FILENAME>]
550 Save a file (in core file format) containing the process record
551 execution log for replay debugging at a later time.
552
553record restore <FILENAME>
554 Restore the process record execution log that was saved at an
555 earlier time, for replay debugging.
556
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557add-inferior [-copies <N>] [-exec <FILENAME>]
558 Add a new inferior.
559
560clone-inferior [-copies <N>] [ID]
561 Make a new inferior ready to execute the same program another
562 inferior has loaded.
563
564remove-inferior ID
565 Remove an inferior.
566
567maint info program-spaces
568 List the program spaces loaded into GDB.
569
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570set remote interrupt-sequence [Ctrl-C | BREAK | BREAK-g]
571show remote interrupt-sequence
572 Allow the user to select one of ^C, a BREAK signal or BREAK-g
573 as the sequence to the remote target in order to interrupt the execution.
574 Ctrl-C is a default. Some system prefers BREAK which is high level of
575 serial line for some certain time. Linux kernel prefers BREAK-g, a.k.a
576 Magic SysRq g. It is BREAK signal and character 'g'.
577
578set remote interrupt-on-connect [on | off]
579show remote interrupt-on-connect
580 When interrupt-on-connect is ON, gdb sends interrupt-sequence to
581 remote target when gdb connects to it. This is needed when you debug
582 Linux kernel.
583
584set remotebreak [on | off]
585show remotebreak
586Deprecated. Use "set/show remote interrupt-sequence" instead.
587
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588tvariable $NAME [ = EXP ]
589 Create or modify a trace state variable.
590
591info tvariables
592 List trace state variables and their values.
593
594delete tvariable $NAME ...
595 Delete one or more trace state variables.
596
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597teval EXPR, ...
598 Evaluate the given expressions without collecting anything into the
599 trace buffer. (Valid in tracepoint actions only.)
600
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601ftrace FN / FILE:LINE / *ADDR
602 Define a fast tracepoint at the given function, line, or address.
603
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604* New expression syntax
605
606 GDB now parses the 0b prefix of binary numbers the same way as GCC does.
607 GDB now parses 0b101010 identically with 42.
608
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609* New options
610
611set follow-exec-mode new|same
612show follow-exec-mode
613 Control whether GDB reuses the same inferior across an exec call or
614 creates a new one. This is useful to be able to restart the old
615 executable after the inferior having done an exec call.
616
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617set default-collect EXPR, ...
618show default-collect
619 Define a list of expressions to be collected at each tracepoint.
620 This is a useful way to ensure essential items are not overlooked,
621 such as registers or a critical global variable.
622
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623set disconnected-tracing
624show disconnected-tracing
625 If set to 1, the target is instructed to continue tracing if it
626 loses its connection to GDB. If 0, the target is to stop tracing
627 upon disconnection.
628
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629set circular-trace-buffer
630show circular-trace-buffer
631 If set to on, the target is instructed to use a circular trace buffer
632 and discard the oldest trace frames instead of stopping the trace due
633 to a full trace buffer. If set to off, the trace stops when the buffer
634 fills up. Some targets may not support this.
635
fb2e7cb4
JB
636set script-extension off|soft|strict
637show script-extension
638 If set to "off", the debugger does not perform any script language
639 recognition, and all sourced files are assumed to be GDB scripts.
640 If set to "soft" (the default), files are sourced according to
641 filename extension, falling back to GDB scripts if the first
642 evaluation failed.
643 If set to "strict", files are sourced according to filename extension.
644
2b71fc8e
JB
645set ada trust-PAD-over-XVS on|off
646show ada trust-PAD-over-XVS
647 If off, activate a workaround against a bug in the debugging information
648 generated by the compiler for PAD types (see gcc/exp_dbug.ads in
649 the GCC sources for more information about the GNAT encoding and
650 PAD types in particular). It is always safe to set this option to
651 off, but this introduces a slight performance penalty. The default
652 is on.
653
de2e5182
TT
654* Python API Improvements
655
656 ** GDB provides the new class gdb.LazyString. This is useful in
657 some pretty-printing cases. The new method gdb.Value.lazy_string
658 provides a simple way to create objects of this type.
659
660 ** The fields returned by gdb.Type.fields now have an
661 `is_base_class' attribute.
662
663 ** The new method gdb.Type.range returns the range of an array type.
664
665 ** The new method gdb.parse_and_eval can be used to parse and
666 evaluate an expression.
667
f61e138d
SS
668* New remote packets
669
670QTDV
671 Define a trace state variable.
672
673qTV
674 Get the current value of a trace state variable.
675
d5551862
SS
676QTDisconnected
677 Set desired tracing behavior upon disconnection.
678
4daf5ac0
SS
679QTBuffer:circular
680 Set the trace buffer to be linear or circular.
681
d5551862
SS
682qTfP, qTsP
683 Get data about the tracepoints currently in use.
684
2d483d34
MS
685* Bug fixes
686
687Process record now works correctly with hardware watchpoints.
688
6e0e5977
JB
689Multiple bug fixes have been made to the mips-irix port, making it
690much more reliable. In particular:
691 - Debugging threaded applications is now possible again. Previously,
692 GDB would hang while starting the program, or while waiting for
693 the program to stop at a breakpoint.
694 - Attaching to a running process no longer hangs.
695 - An error occurring while loading a core file has been fixed.
696 - Changing the value of the PC register now works again. This fixes
697 problems observed when using the "jump" command, or when calling
698 a function from GDB, or even when assigning a new value to $pc.
699 - With the "finish" and "return" commands, the return value for functions
700 returning a small array is now correctly printed.
701 - It is now possible to break on shared library code which gets executed
702 during a shared library init phase (code executed while executing
703 their .init section). Previously, the breakpoint would have no effect.
704 - GDB is now able to backtrace through the signal handler for
705 non-threaded programs.
706
93c26624
JK
707PIE (Position Independent Executable) programs debugging is now supported.
708This includes debugging execution of PIC (Position Independent Code) shared
709libraries although for that, it should be possible to run such libraries as an
710executable program.
711
abc7453d 712*** Changes in GDB 7.0
75feb17d 713
4efc6507
DE
714* GDB now has an interface for JIT compilation. Applications that
715dynamically generate code can create symbol files in memory and register
716them with GDB. For users, the feature should work transparently, and
717for JIT developers, the interface is documented in the GDB manual in the
718"JIT Compilation Interface" chapter.
719
782b2b07
SS
720* Tracepoints may now be conditional. The syntax is as for
721breakpoints; either an "if" clause appended to the "trace" command,
722or the "condition" command is available. GDB sends the condition to
723the target for evaluation using the same bytecode format as is used
724for tracepoint actions.
725
53a71c06
CR
726* The disassemble command now supports: an optional /r modifier, print the
727raw instructions in hex as well as in symbolic form, and an optional /m
728modifier to print mixed source+assembly.
e6158f16 729
e7a8dbfb
HZ
730* Process record and replay
731
732 In a architecture environment that supports ``process record and
733 replay'', ``process record and replay'' target can record a log of
734 the process execution, and replay it with both forward and reverse
735 execute commands.
736
64644d9b
MS
737* Reverse debugging: GDB now has new commands reverse-continue, reverse-
738step, reverse-next, reverse-finish, reverse-stepi, reverse-nexti, and
739set execution-direction {forward|reverse}, for targets that support
740reverse execution.
741
b9412953
DD
742* GDB now supports hardware watchpoints on MIPS/Linux systems. This
743feature is available with a native GDB running on kernel version
7442.6.28 or later.
745
6c7a06a3
TT
746* GDB now has support for multi-byte and wide character sets on the
747target. Strings whose character type is wchar_t, char16_t, or
748char32_t are now correctly printed. GDB supports wide- and unicode-
749literals in C, that is, L'x', L"string", u'x', u"string", U'x', and
750U"string" syntax. And, GDB allows the "%ls" and "%lc" formats in
751`printf'. This feature requires iconv to work properly; if your
752system does not have a working iconv, GDB can use GNU libiconv. See
753the installation instructions for more information.
754
f1838a98
UW
755* GDB now supports automatic retrieval of shared library files from
756remote targets. To use this feature, specify a system root that begins
757with the `remote:' prefix, either via the `set sysroot' command or via
758the `--with-sysroot' configure-time option.
759
55333a84
DE
760* "info sharedlibrary" now takes an optional regex of libraries to show,
761and it now reports if a shared library has no debugging information.
762
7f6a6314
PM
763* Commands `set debug-file-directory', `set solib-search-path' and `set args'
764now complete on file names.
765
65d12d83
TT
766* When completing in expressions, gdb will attempt to limit
767completions to allowable structure or union fields, where appropriate.
768For instance, consider:
769
770 # struct example { int f1; double f2; };
771 # struct example variable;
772 (gdb) p variable.
773
774If the user types TAB at the end of this command line, the available
775completions will be "f1" and "f2".
776
edb3359d
DJ
777* Inlined functions are now supported. They show up in backtraces, and
778the "step", "next", and "finish" commands handle them automatically.
779
2fae03e8
TT
780* GDB now supports the token-splicing (##) and stringification (#)
781operators when expanding macros. It also supports variable-arity
782macros.
783
47a3467a 784* GDB now supports inspecting extra signal information, exported by
58d6951d
DJ
785the new $_siginfo convenience variable. The feature is currently
786implemented on linux ARM, i386 and amd64.
787
788* GDB can now display the VFP floating point registers and NEON vector
789registers on ARM targets. Both ARM GNU/Linux native GDB and gdbserver
790can provide these registers (requires Linux 2.6.30 or later). Remote
791and simulator targets may also provide them.
47a3467a 792
08388c79
DE
793* New remote packets
794
795qSearch:memory:
796 Search memory for a sequence of bytes.
797
a6f3e723
SL
798QStartNoAckMode
799 Turn off `+'/`-' protocol acknowledgments to permit more efficient
800 operation over reliable transport links. Use of this packet is
801 controlled by the `set remote noack-packet' command.
802
d7713ae0
EZ
803vKill
804 Kill the process with the specified process ID. Use this in preference
805 to `k' when multiprocess protocol extensions are supported.
806
07e059b5
VP
807qXfer:osdata:read
808 Obtains additional operating system information
809
47a3467a
PA
810qXfer:siginfo:read
811qXfer:siginfo:write
812 Read or write additional signal information.
813
060871df
PA
814* Removed remote protocol undocumented extension
815
816 An undocumented extension to the remote protocol's `S' stop reply
817 packet that permited the stub to pass a process id was removed.
818 Remote servers should use the `T' stop reply packet instead.
819
c055b101 820* GDB now supports multiple function calling conventions according to the
a0ef4274 821DWARF-2 DW_AT_calling_convention function attribute.
c055b101
CV
822
823* The SH target utilizes the aforementioned change to distinguish between gcc
a0ef4274
DJ
824and Renesas calling convention. It also adds the new CLI commands
825`set/show sh calling-convention'.
c055b101 826
31fffb02
CS
827* GDB can now read compressed debug sections, as produced by GNU gold
828with the --compress-debug-sections=zlib flag.
829
88d8a8e0
JB
830* 64-bit core files are now supported on AIX.
831
7f99b190
JB
832* Thread switching is now supported on Tru64.
833
ccd213ac
DJ
834* Watchpoints can now be set on unreadable memory locations, e.g. addresses
835which will be allocated using malloc later in program execution.
836
1fddbabb 837* The qXfer:libraries:read remote procotol packet now allows passing a
31fffb02 838list of section offsets.
1fddbabb 839
a0ef4274
DJ
840* On GNU/Linux, GDB can now attach to stopped processes. Several race
841conditions handling signals delivered during attach or thread creation
842have also been fixed.
843
bfb8797a 844* GDB now supports the use of DWARF boolean types for Ada's type Boolean.
158c7665
PH
845From the user's standpoint, all unqualified instances of True and False
846are treated as the standard definitions, regardless of context.
bfb8797a 847
71c25dea
TT
848* GDB now parses C++ symbol and type names more flexibly. For
849example, given:
850
851 template<typename T> class C { };
852 C<char const *> c;
853
854GDB will now correctly handle all of:
855
856 ptype C<char const *>
857 ptype C<char const*>
858 ptype C<const char *>
859 ptype C<const char*>
860
ccd213ac
DJ
861* New features in the GDB remote stub, gdbserver
862
863 - The "--wrapper" command-line argument tells gdbserver to use a
864 wrapper program to launch programs for debugging.
865
7ae0e2a2
UW
866 - On PowerPC and S/390 targets, it is now possible to use a single
867 gdbserver executable to debug both 32-bit and 64-bit programs.
868 (This requires gdbserver itself to be built as a 64-bit executable.)
869
a6f3e723
SL
870 - gdbserver uses the new noack protocol mode for TCP connections to
871 reduce communications latency, if also supported and enabled in GDB.
872
da8bd9a3
DJ
873 - Support for the sparc64-linux-gnu target is now included in
874 gdbserver.
875
d70e31dd
DE
876 - The amd64-linux build of gdbserver now supports debugging both
877 32-bit and 64-bit programs.
878
879 - The i386-linux, amd64-linux, and i386-win32 builds of gdbserver
880 now support hardware watchpoints, and will use them automatically
881 as appropriate.
882
d57a3c85
TJB
883* Python scripting
884
885 GDB now has support for scripting using Python. Whether this is
886 available is determined at configure time.
887
d8906c6f
TJB
888 New GDB commands can now be written in Python.
889
aadc346a
JB
890* Ada tasking support
891
892 Ada tasks can now be inspected in GDB. The following commands have
893 been introduced:
894
895 info tasks
896 Print the list of Ada tasks.
897 info task N
898 Print detailed information about task number N.
899 task
900 Print the task number of the current task.
901 task N
902 Switch the context of debugging to task number N.
903
adb483fe
DJ
904* Support for user-defined prefixed commands. The "define" command can
905add new commands to existing prefixes, e.g. "target".
906
2277426b
PA
907* Multi-inferior, multi-process debugging.
908
909 GDB now has generalized support for multi-inferior debugging. See
910 "Debugging Multiple Inferiors" in the manual for more information.
911 Although availability still depends on target support, the command
912 set is more uniform now. The GNU/Linux specific multi-forks support
913 has been migrated to this new framework. This implied some user
914 visible changes; see "New commands" and also "Removed commands"
915 below.
916
08d16641
PA
917* Target descriptions can now describe the target OS ABI. See the
918"Target Description Format" section in the user manual for more
919information.
920
e35359c5
UW
921* Target descriptions can now describe "compatible" architectures
922to indicate that the target can execute applications for a different
923architecture in addition to those for the main target architecture.
924See the "Target Description Format" section in the user manual for
925more information.
926
85e747d2
UW
927* Multi-architecture debugging.
928
929 GDB now includes general supports for debugging applications on
930 hybrid systems that use more than one single processor architecture
931 at the same time. Each such hybrid architecture still requires
932 specific support to be added. The only hybrid architecture supported
933 in this version of GDB is the Cell Broadband Engine.
934
935* GDB now supports integrated debugging of Cell/B.E. applications that
936use both the PPU and SPU architectures. To enable support for hybrid
937Cell/B.E. debugging, you need to configure GDB to support both the
938powerpc-linux or powerpc64-linux and the spu-elf targets, using the
939--enable-targets configure option.
940
11ade57a
PA
941* Non-stop mode debugging.
942
943 For some targets, GDB now supports an optional mode of operation in
944 which you can examine stopped threads while other threads continue
945 to execute freely. This is referred to as non-stop mode, with the
946 old mode referred to as all-stop mode. See the "Non-Stop Mode"
947 section in the user manual for more information.
948
949 To be able to support remote non-stop debugging, a remote stub needs
950 to implement the non-stop mode remote protocol extensions, as
951 described in the "Remote Non-Stop" section of the user manual. The
952 GDB remote stub, gdbserver, has been adjusted to support these
953 extensions on linux targets.
954
d7713ae0 955* New commands (for set/show, see "New options" below)
75feb17d 956
a96d9b2e
SDJ
957catch syscall [NAME(S) | NUMBER(S)]
958 Catch system calls. Arguments, which should be names of system
959 calls or their numbers, mean catch only those syscalls. Without
960 arguments, every syscall will be caught. When the inferior issues
961 any of the specified syscalls, GDB will stop and announce the system
962 call, both when it is called and when its call returns. This
963 feature is currently available with a native GDB running on the
964 Linux Kernel, under the following architectures: x86, x86_64,
965 PowerPC and PowerPC64.
966
08388c79
DE
967find [/size-char] [/max-count] start-address, end-address|+search-space-size,
968 val1 [, val2, ...]
969 Search memory for a sequence of bytes.
970
d57a3c85
TJB
971maint set python print-stack
972maint show python print-stack
973 Show a stack trace when an error is encountered in a Python script.
974
975python [CODE]
976 Invoke CODE by passing it to the Python interpreter.
977
d7713ae0
EZ
978macro define
979macro list
980macro undef
981 These allow macros to be defined, undefined, and listed
982 interactively.
983
984info os processes
985 Show operating system information about processes.
986
2277426b
PA
987info inferiors
988 List the inferiors currently under GDB's control.
989
990inferior NUM
991 Switch focus to inferior number NUM.
992
993detach inferior NUM
994 Detach from inferior number NUM.
995
996kill inferior NUM
997 Kill inferior number NUM.
998
d7713ae0
EZ
999* New options
1000
3285f3fe
UW
1001set spu stop-on-load
1002show spu stop-on-load
1003 Control whether to stop for new SPE threads during Cell/B.E. debugging.
1004
ff1a52c6
UW
1005set spu auto-flush-cache
1006show spu auto-flush-cache
1007 Control whether to automatically flush the software-managed cache
1008 during Cell/B.E. debugging.
1009
d7713ae0
EZ
1010set sh calling-convention
1011show sh calling-convention
1012 Control the calling convention used when calling SH target functions.
1013
e0a3ce09 1014set debug timestamp
75feb17d 1015show debug timestamp
d7713ae0
EZ
1016 Control display of timestamps with GDB debugging output.
1017
1018set disassemble-next-line
1019show disassemble-next-line
1020 Control display of disassembled source lines or instructions when
1021 the debuggee stops.
1022
1023set remote noack-packet
1024show remote noack-packet
1025 Set/show the use of remote protocol QStartNoAckMode packet. See above
1026 under "New remote packets."
1027
1028set remote query-attached-packet
1029show remote query-attached-packet
1030 Control use of remote protocol `qAttached' (query-attached) packet.
1031
1032set remote read-siginfo-object
1033show remote read-siginfo-object
1034 Control use of remote protocol `qXfer:siginfo:read' (read-siginfo-object)
1035 packet.
1036
1037set remote write-siginfo-object
1038show remote write-siginfo-object
1039 Control use of remote protocol `qXfer:siginfo:write' (write-siginfo-object)
1040 packet.
1041
40ab02ce
MS
1042set remote reverse-continue
1043show remote reverse-continue
1044 Control use of remote protocol 'bc' (reverse-continue) packet.
1045
1046set remote reverse-step
1047show remote reverse-step
1048 Control use of remote protocol 'bs' (reverse-step) packet.
1049
d7713ae0
EZ
1050set displaced-stepping
1051show displaced-stepping
1052 Control displaced stepping mode. Displaced stepping is a way to
1053 single-step over breakpoints without removing them from the debuggee.
1054 Also known as "out-of-line single-stepping".
1055
1056set debug displaced
1057show debug displaced
1058 Control display of debugging info for displaced stepping.
1059
1060maint set internal-error
1061maint show internal-error
1062 Control what GDB does when an internal error is detected.
1063
1064maint set internal-warning
1065maint show internal-warning
1066 Control what GDB does when an internal warning is detected.
75feb17d 1067
ccd213ac
DJ
1068set exec-wrapper
1069show exec-wrapper
1070unset exec-wrapper
1071 Use a wrapper program to launch programs for debugging.
fa4727a6 1072
aad4b048
JB
1073set multiple-symbols (all|ask|cancel)
1074show multiple-symbols
1075 The value of this variable can be changed to adjust the debugger behavior
1076 when an expression or a breakpoint location contains an ambiguous symbol
1077 name (an overloaded function name, for instance).
1078
74960c60
VP
1079set breakpoint always-inserted
1080show breakpoint always-inserted
1081 Keep breakpoints always inserted in the target, as opposed to inserting
1082 them when resuming the target, and removing them when the target stops.
1083 This option can improve debugger performance on slow remote targets.
1084
0428b8f5
DJ
1085set arm fallback-mode (arm|thumb|auto)
1086show arm fallback-mode
1087set arm force-mode (arm|thumb|auto)
1088show arm force-mode
1089 These commands control how ARM GDB determines whether instructions
1090 are ARM or Thumb. The default for both settings is auto, which uses
1091 the current CPSR value for instructions without symbols; previous
1092 versions of GDB behaved as if "set arm fallback-mode arm".
1093
10568435
JK
1094set disable-randomization
1095show disable-randomization
1096 Standalone programs run with the virtual address space randomization enabled
1097 by default on some platforms. This option keeps the addresses stable across
1098 multiple debugging sessions.
1099
d7713ae0
EZ
1100set non-stop
1101show non-stop
1102 Control whether other threads are stopped or not when some thread hits
1103 a breakpoint.
1104
b3eb342c 1105set target-async
d7713ae0 1106show target-async
b3eb342c
VP
1107 Requests that asynchronous execution is enabled in the target, if available.
1108 In this case, it's possible to resume target in the background, and interact
1109 with GDB while the target is running. "show target-async" displays the
1110 current state of asynchronous execution of the target.
1111
6c7a06a3
TT
1112set target-wide-charset
1113show target-wide-charset
1114 The target-wide-charset is the name of the character set that GDB
1115 uses when printing characters whose type is wchar_t.
1116
84603566
SL
1117set tcp auto-retry (on|off)
1118show tcp auto-retry
1119set tcp connect-timeout
1120show tcp connect-timeout
1121 These commands allow GDB to retry failed TCP connections to a remote stub
1122 with a specified timeout period; this is useful if the stub is launched
1123 in parallel with GDB but may not be ready to accept connections immediately.
1124
17a37d48
PP
1125set libthread-db-search-path
1126show libthread-db-search-path
1127 Control list of directories which GDB will search for appropriate
1128 libthread_db.
1129
d4db2f36
PA
1130set schedule-multiple (on|off)
1131show schedule-multiple
1132 Allow GDB to resume all threads of all processes or only threads of
1133 the current process.
1134
4e5d721f
DE
1135set stack-cache
1136show stack-cache
1137 Use more aggressive caching for accesses to the stack. This improves
1138 performance of remote debugging (particularly backtraces) without
1139 affecting correctness.
1140
910c5da8
JB
1141set interactive-mode (on|off|auto)
1142show interactive-mode
1143 Control whether GDB runs in interactive mode (on) or not (off).
1144 When in interactive mode, GDB waits for the user to answer all
1145 queries. Otherwise, GDB does not wait and assumes the default
1146 answer. When set to auto (the default), GDB determines which
1147 mode to use based on the stdin settings.
1148
2277426b
PA
1149* Removed commands
1150
1151info forks
1152 For program forks, this is replaced by the new more generic `info
1153 inferiors' command. To list checkpoints, you can still use the
1154 `info checkpoints' command, which was an alias for the `info forks'
1155 command.
1156
1157fork NUM
1158 Replaced by the new `inferior' command. To switch between
1159 checkpoints, you can still use the `restart' command, which was an
1160 alias for the `fork' command.
1161
1162process PID
1163 This is removed, since some targets don't have a notion of
1164 processes. To switch between processes, you can still use the
1165 `inferior' command using GDB's own inferior number.
1166
1167delete fork NUM
1168 For program forks, this is replaced by the new more generic `kill
1169 inferior' command. To delete a checkpoint, you can still use the
1170 `delete checkpoint' command, which was an alias for the `delete
1171 fork' command.
1172
1173detach fork NUM
1174 For program forks, this is replaced by the new more generic `detach
1175 inferior' command. To detach a checkpoint, you can still use the
1176 `detach checkpoint' command, which was an alias for the `detach
1177 fork' command.
1178
a80b95ba
TG
1179* New native configurations
1180
1181x86/x86_64 Darwin i[34567]86-*-darwin*
1182
b8bfd3ed
JB
1183x86_64 MinGW x86_64-*-mingw*
1184
75a2d5e7
TT
1185* New targets
1186
c28c63d8 1187Lattice Mico32 lm32-*
75a2d5e7 1188x86 DICOS i[34567]86-*-dicos*
4c1d2973 1189x86_64 DICOS x86_64-*-dicos*
5f814c3b 1190S+core 3 score-*-*
75a2d5e7 1191
6de3146c
PA
1192* The GDB remote stub, gdbserver, now supports x86 Windows CE
1193 (mingw32ce) debugging.
1194
d5cbbe6e
JB
1195* Removed commands
1196
1197catch load
1198catch unload
1199 These commands were actually not implemented on any target.
1200
75feb17d 1201*** Changes in GDB 6.8
f9ed52be 1202
af5ca30d
NH
1203* New native configurations
1204
1205NetBSD/hppa hppa*-*netbsd*
94a0e877 1206Xtensa GNU/Linux xtensa*-*-linux*
af5ca30d
NH
1207
1208* New targets
1209
1210NetBSD/hppa hppa*-*-netbsd*
94a0e877 1211Xtensa GNU/Lunux xtensa*-*-linux*
af5ca30d 1212
7a404eba
PA
1213* Change in command line behavior -- corefiles vs. process ids.
1214
1215 When the '-p NUMBER' or '--pid NUMBER' options are used, and
1216 attaching to process NUMBER fails, GDB no longer attempts to open a
1217 core file named NUMBER. Attaching to a program using the -c option
1218 is no longer supported. Instead, use the '-p' or '--pid' options.
1219
430ebac9
PA
1220* GDB can now be built as a native debugger for debugging Windows x86
1221(mingw32) Portable Executable (PE) programs.
1222
fe6fbf8b 1223* Pending breakpoints no longer change their number when their address
8d5f9c6f 1224is resolved.
fe6fbf8b
VP
1225
1226* GDB now supports breakpoints with multiple locations,
8d5f9c6f
DJ
1227including breakpoints on C++ constructors, inside C++ templates,
1228and in inlined functions.
fe6fbf8b 1229
10665d76
JB
1230* GDB's ability to debug optimized code has been improved. GDB more
1231accurately identifies function bodies and lexical blocks that occupy
1232more than one contiguous range of addresses.
1233
7cc46491
DJ
1234* Target descriptions can now describe registers for PowerPC.
1235
d71340b8
DJ
1236* The GDB remote stub, gdbserver, now supports the AltiVec and SPE
1237registers on PowerPC targets.
1238
523c4513
DJ
1239* The GDB remote stub, gdbserver, now supports thread debugging on GNU/Linux
1240targets even when the libthread_db library is not available.
1241
a6b151f1
DJ
1242* The GDB remote stub, gdbserver, now supports the new file transfer
1243commands (remote put, remote get, and remote delete).
1244
2d717e4f
DJ
1245* The GDB remote stub, gdbserver, now supports run and attach in
1246extended-remote mode.
1247
24a836bd 1248* hppa*64*-*-hpux11* target broken
d001be7a
DJ
1249The debugger is unable to start a program and fails with the following
1250error: "Error trying to get information about dynamic linker".
1251The gdb-6.7 release is also affected.
24a836bd 1252
d0c678e6
UW
1253* GDB now supports the --enable-targets= configure option to allow
1254building a single GDB executable that supports multiple remote
1255target architectures.
1256
d64a946d
TJB
1257* GDB now supports debugging C and C++ programs which use the
1258Decimal Floating Point extension. In addition, the PowerPC target
1259now has a set of pseudo-registers to inspect decimal float values
1260stored in two consecutive float registers.
1261
ee163bf5
VP
1262* The -break-insert MI command can optionally create pending
1263breakpoints now.
1264
b93b6ca7 1265* Improved support for debugging Ada
d001be7a
DJ
1266Many improvements to the Ada language support have been made. These
1267include:
b93b6ca7
JB
1268 - Better support for Ada2005 interface types
1269 - Improved handling of arrays and slices in general
1270 - Better support for Taft-amendment types
1271 - The '{type} ADDRESS' expression is now allowed on the left hand-side
1272 of an assignment
1273 - Improved command completion in Ada
1274 - Several bug fixes
1275
d001be7a
DJ
1276* GDB on GNU/Linux and HP/UX can now debug through "exec" of a new
1277process.
1278
a6b151f1
DJ
1279* New commands
1280
6d53d0af
JB
1281set print frame-arguments (all|scalars|none)
1282show print frame-arguments
1283 The value of this variable can be changed to control which argument
1284 values should be printed by the debugger when displaying a frame.
1285
a6b151f1
DJ
1286remote put
1287remote get
1288remote delete
1289 Transfer files to and from a remote target, and delete remote files.
1290
1291* New MI commands
1292
1293-target-file-put
1294-target-file-get
1295-target-file-delete
1296 Transfer files to and from a remote target, and delete remote files.
1297
1298* New remote packets
1299
1300vFile:open:
1301vFile:close:
1302vFile:pread:
1303vFile:pwrite:
1304vFile:unlink:
1305 Open, close, read, write, and delete files on the remote system.
d0c678e6 1306
2d717e4f
DJ
1307vAttach
1308 Attach to an existing process on the remote system, in extended-remote
1309 mode.
1310
1311vRun
1312 Run a new process on the remote system, in extended-remote mode.
1313
8d5f9c6f 1314*** Changes in GDB 6.7
6dd09645 1315
19d378fc
MS
1316* Resolved 101 resource leaks, null pointer dereferences, etc. in gdb,
1317bfd, libiberty and opcodes, as revealed by static analysis donated by
1318Coverity, Inc. (http://scan.coverity.com).
1319
3a40aaa0
UW
1320* When looking up multiply-defined global symbols, GDB will now prefer the
1321symbol definition in the current shared library if it was built using the
1322-Bsymbolic linker option.
1323
a6ec25f2
BW
1324* When the Text User Interface (TUI) is not configured, GDB will now
1325recognize the -tui command-line option and print a message that the TUI
1326is not supported.
1327
6dd09645
JB
1328* The GDB remote stub, gdbserver, now has lower overhead for high
1329frequency signals (e.g. SIGALRM) via the QPassSignals packet.
1330
c9bb8148
DJ
1331* GDB for MIPS targets now autodetects whether a remote target provides
133232-bit or 64-bit register values.
1333
0d5de010
DJ
1334* Support for C++ member pointers has been improved.
1335
23181151
DJ
1336* GDB now understands XML target descriptions, which specify the
1337target's overall architecture. GDB can read a description from
1338a local file or over the remote serial protocol.
1339
ea37ba09
DJ
1340* Vectors of single-byte data use a new integer type which is not
1341automatically displayed as character or string data.
1342
1343* The /s format now works with the print command. It displays
1344arrays of single-byte integers and pointers to single-byte integers
1345as strings.
e1f48ead 1346
123dc839
DJ
1347* Target descriptions can now describe target-specific registers,
1348for architectures which have implemented the support (currently
8d5f9c6f 1349only ARM, M68K, and MIPS).
123dc839 1350
05a4558a
DJ
1351* GDB and the GDB remote stub, gdbserver, now support the XScale
1352iWMMXt coprocessor.
fb1e4ffc 1353
7c963485
PA
1354* The GDB remote stub, gdbserver, has been updated to support
1355ARM Windows CE (mingw32ce) debugging, and GDB Windows CE support
1356has been rewritten to use the standard GDB remote protocol.
1357
b18be20d
DJ
1358* GDB can now step into C++ functions which are called through thunks.
1359
0ca420ce
UW
1360* GDB for the Cell/B.E. SPU now supports overlay debugging.
1361
31d99776
DJ
1362* The GDB remote protocol "qOffsets" packet can now honor ELF segment
1363layout. It also supports a TextSeg= and DataSeg= response when only
1364segment base addresses (rather than offsets) are available.
1365
a4642986
MR
1366* The /i format now outputs any trailing branch delay slot instructions
1367immediately following the last instruction within the count specified.
1368
cfa9d6d9
DJ
1369* The GDB remote protocol "T" stop reply packet now supports a
1370"library" response. Combined with the new "qXfer:libraries:read"
1371packet, this response allows GDB to debug shared libraries on targets
1372where the operating system manages the list of loaded libraries (e.g.
1373Windows and SymbianOS).
255e7678
DJ
1374
1375* The GDB remote stub, gdbserver, now supports dynamic link libraries
1376(DLLs) on Windows and Windows CE targets.
f5db8714
JK
1377
1378* GDB now supports a faster verification that a .debug file matches its binary
1379according to its build-id signature, if the signature is present.
cfa9d6d9 1380
c9bb8148
DJ
1381* New commands
1382
23776285
MR
1383set remoteflow
1384show remoteflow
1385 Enable or disable hardware flow control (RTS/CTS) on the serial port
1386 when debugging using remote targets.
1387
c9bb8148
DJ
1388set mem inaccessible-by-default
1389show mem inaccessible-by-default
1390 If the target supplies a memory map, for instance via the remote
1391 protocol's "qXfer:memory-map:read" packet, setting this variable
1392 prevents GDB from accessing memory outside the memory map. This
1393 is useful for targets with memory mapped registers or which react
1394 badly to accesses of unmapped address space.
1395
1396set breakpoint auto-hw
1397show breakpoint auto-hw
1398 If the target supplies a memory map, for instance via the remote
1399 protocol's "qXfer:memory-map:read" packet, setting this variable
1400 lets GDB use hardware breakpoints automatically for memory regions
1401 where it can not use software breakpoints. This covers both the
1402 "break" command and internal breakpoints used for other commands
1403 including "next" and "finish".
1404
0e420bd8
JB
1405catch exception
1406catch exception unhandled
1407 Stop the program execution when Ada exceptions are raised.
1408
1409catch assert
1410 Stop the program execution when an Ada assertion failed.
1411
f822c95b
DJ
1412set sysroot
1413show sysroot
1414 Set an alternate system root for target files. This is a more
1415 general version of "set solib-absolute-prefix", which is now
1416 an alias to "set sysroot".
1417
83cc5c53
UW
1418info spu
1419 Provide extended SPU facility status information. This set of
1420 commands is available only when debugging the Cell/B.E. SPU
1421 architecture.
1422
bd372731
MK
1423* New native configurations
1424
1425OpenBSD/sh sh*-*openbsd*
1426
23181151
DJ
1427set tdesc filename
1428unset tdesc filename
1429show tdesc filename
1430 Use the specified local file as an XML target description, and do
1431 not query the target for its built-in description.
1432
c9bb8148
DJ
1433* New targets
1434
54fe9172 1435OpenBSD/sh sh*-*-openbsd*
c9bb8148 1436MIPS64 GNU/Linux (gdbserver) mips64-linux-gnu
c077150c 1437Toshiba Media Processor mep-elf
c9bb8148 1438
6dd09645
JB
1439* New remote packets
1440
1441QPassSignals:
1442 Ignore the specified signals; pass them directly to the debugged program
1443 without stopping other threads or reporting them to GDB.
1444
23181151
DJ
1445qXfer:features:read:
1446 Read an XML target description from the target, which describes its
1447 features.
6dd09645 1448
83cc5c53
UW
1449qXfer:spu:read:
1450qXfer:spu:write:
1451 Read or write contents of an spufs file on the target system. These
1452 packets are available only on the Cell/B.E. SPU architecture.
1453
cfa9d6d9
DJ
1454qXfer:libraries:read:
1455 Report the loaded shared libraries. Combined with new "T" packet
1456 response, this packet allows GDB to debug shared libraries on
1457 targets where the operating system manages the list of loaded
1458 libraries (e.g. Windows and SymbianOS).
1459
483367ee
DJ
1460* Removed targets
1461
1462Support for these obsolete configurations has been removed.
1463
d08950c4
UW
1464alpha*-*-osf1*
1465alpha*-*-osf2*
7ce59000 1466d10v-*-*
483367ee
DJ
1467hppa*-*-hiux*
1468i[34567]86-ncr-*
1469i[34567]86-*-dgux*
1470i[34567]86-*-lynxos*
1471i[34567]86-*-netware*
1472i[34567]86-*-sco3.2v5*
1473i[34567]86-*-sco3.2v4*
1474i[34567]86-*-sco*
1475i[34567]86-*-sysv4.2*
1476i[34567]86-*-sysv4*
1477i[34567]86-*-sysv5*
1478i[34567]86-*-unixware2*
1479i[34567]86-*-unixware*
1480i[34567]86-*-sysv*
1481i[34567]86-*-isc*
1482m68*-cisco*-*
1483m68*-tandem-*
ad527d2e 1484mips*-*-pe
483367ee 1485rs6000-*-lynxos*
ad527d2e 1486sh*-*-pe
483367ee 1487
7ce59000
DJ
1488* Other removed features
1489
1490target abug
1491target cpu32bug
1492target est
1493target rom68k
1494
1495 Various m68k-only ROM monitors.
1496
ea35711c
DJ
1497target hms
1498target e7000
1499target sh3
1500target sh3e
1501
1502 Various Renesas ROM monitors and debugging interfaces for SH and
1503 H8/300.
1504
1505target ocd
1506
1507 Support for a Macraigor serial interface to on-chip debugging.
1508 GDB does not directly support the newer parallel or USB
1509 interfaces.
1510
7ce59000
DJ
1511DWARF 1 support
1512
1513 A debug information format. The predecessor to DWARF 2 and
1514 DWARF 3, which are still supported.
1515
54d61198
DJ
1516Support for the HP aCC compiler on HP-UX/PA-RISC
1517
1518 SOM-encapsulated symbolic debugging information, automatic
1519 invocation of pxdb, and the aCC custom C++ ABI. This does not
1520 affect HP-UX for Itanium or GCC for HP-UX/PA-RISC. Code compiled
1521 with aCC can still be debugged on an assembly level.
1522
ea35711c
DJ
1523MIPS ".pdr" sections
1524
1525 A MIPS-specific format used to describe stack frame layout
1526 in debugging information.
1527
1528Scheme support
1529
1530 GDB could work with an older version of Guile to debug
1531 the interpreter and Scheme programs running in it.
1532
1a69e1e4
DJ
1533set mips stack-arg-size
1534set mips saved-gpreg-size
1535
1536 Use "set mips abi" to control parameter passing for MIPS.
1537
6dd09645 1538*** Changes in GDB 6.6
e374b601 1539
ca3bf3bd
DJ
1540* New targets
1541
1542Xtensa xtensa-elf
9c309e77 1543Cell Broadband Engine SPU spu-elf
ca3bf3bd 1544
6aec2e11
DJ
1545* GDB can now be configured as a cross-debugger targeting native Windows
1546(mingw32) or Cygwin. It can communicate with a remote debugging stub
1547running on a Windows system over TCP/IP to debug Windows programs.
1548
1549* The GDB remote stub, gdbserver, has been updated to support Windows and
1550Cygwin debugging. Both single-threaded and multi-threaded programs are
1551supported.
1552
17218d91
DJ
1553* The "set trust-readonly-sections" command works again. This command was
1554broken in GDB 6.3, 6.4, and 6.5.
1555
9ebce043
DJ
1556* The "load" command now supports writing to flash memory, if the remote
1557stub provides the required support.
1558
7d3d3ece
DJ
1559* Support for GNU/Linux Thread Local Storage (TLS, per-thread variables) no
1560longer requires symbolic debug information (e.g. DWARF-2).
1561
4f8253f3
JB
1562* New commands
1563
1564set substitute-path
1565unset substitute-path
1566show substitute-path
1567 Manage a list of substitution rules that GDB uses to rewrite the name
1568 of the directories where the sources are located. This can be useful
1569 for instance when the sources were moved to a different location
1570 between compilation and debugging.
1571
9fa66fd7
AS
1572set trace-commands
1573show trace-commands
1574 Print each CLI command as it is executed. Each command is prefixed with
1575 a number of `+' symbols representing the nesting depth.
1576 The source command now has a `-v' option to enable the same feature.
1577
1f5befc1
DJ
1578* REMOVED features
1579
1580The ARM Demon monitor support (RDP protocol, "target rdp").
1581
2ec3381a
DJ
1582Kernel Object Display, an embedded debugging feature which only worked with
1583an obsolete version of Cisco IOS.
1584
3d00d119
DJ
1585The 'set download-write-size' and 'show download-write-size' commands.
1586
be2a5f71
DJ
1587* New remote packets
1588
1589qSupported:
1590 Tell a stub about GDB client features, and request remote target features.
1591 The first feature implemented is PacketSize, which allows the target to
1592 specify the size of packets it can handle - to minimize the number of
1593 packets required and improve performance when connected to a remote
1594 target.
1595
0876f84a
DJ
1596qXfer:auxv:read:
1597 Fetch an OS auxilliary vector from the remote stub. This packet is a
1598 more efficient replacement for qPart:auxv:read.
1599
9ebce043
DJ
1600qXfer:memory-map:read:
1601 Fetch a memory map from the remote stub, including information about
1602 RAM, ROM, and flash memory devices.
1603
1604vFlashErase:
1605vFlashWrite:
1606vFlashDone:
1607 Erase and program a flash memory device.
1608
0876f84a
DJ
1609* Removed remote packets
1610
1611qPart:auxv:read:
1612 This packet has been replaced by qXfer:auxv:read. Only GDB 6.4 and 6.5
1613 used it, and only gdbserver implemented it.
1614
e374b601 1615*** Changes in GDB 6.5
53e5f3cf 1616
96309189
MS
1617* New targets
1618
1619Renesas M32C/M16C m32c-elf
1620
1621Morpho Technologies ms1 ms1-elf
1622
53e5f3cf
AS
1623* New commands
1624
1625init-if-undefined Initialize a convenience variable, but
1626 only if it doesn't already have a value.
1627
ac264b3b
MS
1628The following commands are presently only implemented for native GNU/Linux:
1629
1630checkpoint Save a snapshot of the program state.
1631
1632restart <n> Return the program state to a
1633 previously saved state.
1634
1635info checkpoints List currently saved checkpoints.
1636
1637delete-checkpoint <n> Delete a previously saved checkpoint.
1638
1639set|show detach-on-fork Tell gdb whether to detach from a newly
1640 forked process, or to keep debugging it.
1641
1642info forks List forks of the user program that
1643 are available to be debugged.
1644
1645fork <n> Switch to debugging one of several
1646 forks of the user program that are
1647 available to be debugged.
1648
1649delete-fork <n> Delete a fork from the list of forks
1650 that are available to be debugged (and
1651 kill the forked process).
1652
1653detach-fork <n> Delete a fork from the list of forks
1654 that are available to be debugged (and
1655 allow the process to continue).
1656
3950dc3f
NS
1657* New architecture
1658
1659Morpho Technologies ms2 ms1-elf
1660
0ea3f30e
DJ
1661* Improved Windows host support
1662
1663GDB now builds as a cross debugger hosted on i686-mingw32, including
1664native console support, and remote communications using either
1665network sockets or serial ports.
1666
f79daebb
GM
1667* Improved Modula-2 language support
1668
1669GDB can now print most types in the Modula-2 syntax. This includes:
1670basic types, set types, record types, enumerated types, range types,
1671pointer types and ARRAY types. Procedure var parameters are correctly
1672printed and hexadecimal addresses and character constants are also
1673written in the Modula-2 syntax. Best results can be obtained by using
1674GNU Modula-2 together with the -gdwarf-2 command line option.
1675
acab6ab2
MM
1676* REMOVED features
1677
1678The ARM rdi-share module.
1679
f4267320
DJ
1680The Netware NLM debug server.
1681
53e5f3cf 1682*** Changes in GDB 6.4
156a53ca 1683
e0ecbda1
MK
1684* New native configurations
1685
02a677ac 1686OpenBSD/arm arm*-*-openbsd*
e0ecbda1
MK
1687OpenBSD/mips64 mips64-*-openbsd*
1688
d64a6579
KB
1689* New targets
1690
1691Morpho Technologies ms1 ms1-elf
1692
b33a6190
AS
1693* New command line options
1694
1695--batch-silent As for --batch, but totally silent.
1696--return-child-result The debugger will exist with the same value
1697 the child (debugged) program exited with.
1698--eval-command COMMAND, -ex COMMAND
1699 Execute a single GDB CLI command. This may be
1700 specified multiple times and in conjunction
1701 with the --command (-x) option.
1702
11dced61
AC
1703* Deprecated commands removed
1704
1705The following commands, that were deprecated in 2000, have been
1706removed:
1707
1708 Command Replacement
1709 set|show arm disassembly-flavor set|show arm disassembler
1710 othernames set arm disassembler
1711 set|show remotedebug set|show debug remote
1712 set|show archdebug set|show debug arch
1713 set|show eventdebug set|show debug event
1714 regs info registers
1715
6fe85783
MK
1716* New BSD user-level threads support
1717
1718It is now possible to debug programs using the user-level threads
1719library on OpenBSD and FreeBSD. Currently supported (target)
1720configurations are:
1721
1722FreeBSD/amd64 x86_64-*-freebsd*
1723FreeBSD/i386 i386-*-freebsd*
1724OpenBSD/i386 i386-*-openbsd*
1725
1726Note that the new kernel threads libraries introduced in FreeBSD 5.x
1727are not yet supported.
1728
5260ca71
MS
1729* New support for Matsushita MN10300 w/sim added
1730(Work in progress). mn10300-elf.
1731
e84ecc99
AC
1732* REMOVED configurations and files
1733
1734VxWorks and the XDR protocol *-*-vxworks
9445aa30 1735Motorola MCORE mcore-*-*
9445aa30 1736National Semiconductor NS32000 ns32k-*-*
156a53ca 1737
31e35378
JB
1738* New "set print array-indexes" command
1739
1740After turning this setting "on", GDB prints the index of each element
1741when displaying arrays. The default is "off" to preserve the previous
1742behavior.
1743
e85e5c83
MK
1744* VAX floating point support
1745
1746GDB now supports the not-quite-ieee VAX F and D floating point formats.
1747
d91e9901
AS
1748* User-defined command support
1749
1750In addition to using $arg0..$arg9 for argument passing, it is now possible
1751to use $argc to determine now many arguments have been passed. See the
1752section on user-defined commands in the user manual for more information.
1753
f2cb65ca
MC
1754*** Changes in GDB 6.3:
1755
f47b1503
AS
1756* New command line option
1757
1758GDB now accepts -l followed by a number to set the timeout for remote
1759debugging.
1760
f2cb65ca
MC
1761* GDB works with GCC -feliminate-dwarf2-dups
1762
1763GDB now supports a more compact representation of DWARF-2 debug
1764information using DW_FORM_ref_addr references. These are produced
1765by GCC with the option -feliminate-dwarf2-dups and also by some
1766proprietary compilers. With GCC, you must use GCC 3.3.4 or later
1767to use -feliminate-dwarf2-dups.
860660cb 1768
d08c0230
AC
1769* Internationalization
1770
1771When supported by the host system, GDB will be built with
1772internationalization (libintl). The task of marking up the sources is
1773continued, we're looking forward to our first translation.
1774
117ea3cf
PH
1775* Ada
1776
1777Initial support for debugging programs compiled with the GNAT
1778implementation of the Ada programming language has been integrated
1779into GDB. In this release, support is limited to expression evaluation.
1780
d08c0230
AC
1781* New native configurations
1782
1783GNU/Linux/m32r m32r-*-linux-gnu
1784
1785* Remote 'p' packet
1786
1787GDB's remote protocol now includes support for the 'p' packet. This
1788packet is used to fetch individual registers from a remote inferior.
1789
1790* END-OF-LIFE registers[] compatibility module
1791
1792GDB's internal register infrastructure has been completely rewritten.
1793The new infrastructure making possible the implementation of key new
1794features including 32x64 (e.g., 64-bit amd64 GDB debugging a 32-bit
1795i386 application).
1796
1797GDB 6.3 will be the last release to include the the registers[]
1798compatibility module that allowed out-of-date configurations to
1799continue to work. This change directly impacts the following
1800configurations:
1801
1802hppa-*-hpux
1803ia64-*-aix
1804mips-*-irix*
1805*-*-lynx
1806mips-*-linux-gnu
1807sds protocol
1808xdr protocol
1809powerpc bdm protocol
1810
1811Unless there is activity to revive these configurations, they will be
1812made OBSOLETE in GDB 6.4, and REMOVED from GDB 6.5.
1813
1814* OBSOLETE configurations and files
1815
1816Configurations that have been declared obsolete in this release have
1817been commented out. Unless there is activity to revive these
1818configurations, the next release of GDB will have their sources
1819permanently REMOVED.
1820
1821h8300-*-*
1822mcore-*-*
1823mn10300-*-*
1824ns32k-*-*
1825sh64-*-*
1826v850-*-*
1827
ebb7c577
AC
1828*** Changes in GDB 6.2.1:
1829
1830* MIPS `break main; run' gave an heuristic-fence-post warning
1831
1832When attempting to run even a simple program, a warning about
1833heuristic-fence-post being hit would be reported. This problem has
1834been fixed.
1835
1836* MIPS IRIX 'long double' crashed GDB
1837
1838When examining a long double variable, GDB would get a segmentation
1839fault. The crash has been fixed (but GDB 6.2 cannot correctly examine
1840IRIX long double values).
1841
1842* VAX and "next"
1843
1844A bug in the VAX stack code was causing problems with the "next"
1845command. This problem has been fixed.
1846
860660cb 1847*** Changes in GDB 6.2:
faae5abe 1848
0dea2468
AC
1849* Fix for ``many threads''
1850
1851On GNU/Linux systems that use the NPTL threads library, a program
1852rapidly creating and deleting threads would confuse GDB leading to the
1853error message:
1854
1855 ptrace: No such process.
1856 thread_db_get_info: cannot get thread info: generic error
1857
1858This problem has been fixed.
1859
2c07db7a
AC
1860* "-async" and "-noasync" options removed.
1861
1862Support for the broken "-noasync" option has been removed (it caused
1863GDB to dump core).
1864
c23968a2
JB
1865* New ``start'' command.
1866
1867This command runs the program until the begining of the main procedure.
1868
71009278
MK
1869* New BSD Kernel Data Access Library (libkvm) interface
1870
1871Using ``target kvm'' it is now possible to debug kernel core dumps and
1872live kernel memory images on various FreeBSD, NetBSD and OpenBSD
1873platforms. Currently supported (native-only) configurations are:
1874
1875FreeBSD/amd64 x86_64-*-freebsd*
1876FreeBSD/i386 i?86-*-freebsd*
1877NetBSD/i386 i?86-*-netbsd*
1878NetBSD/m68k m68*-*-netbsd*
1879NetBSD/sparc sparc-*-netbsd*
1880OpenBSD/amd64 x86_64-*-openbsd*
1881OpenBSD/i386 i?86-*-openbsd*
1882OpenBSD/m68k m68*-openbsd*
1883OpenBSD/sparc sparc-*-openbsd*
1884
3c0b7db2
AC
1885* Signal trampoline code overhauled
1886
1887Many generic problems with GDB's signal handling code have been fixed.
1888These include: backtraces through non-contiguous stacks; recognition
1889of sa_sigaction signal trampolines; backtrace from a NULL pointer
1890call; backtrace through a signal trampoline; step into and out of
1891signal handlers; and single-stepping in the signal trampoline.
1892
73cc75f3
AC
1893Please note that kernel bugs are a limiting factor here. These
1894features have been shown to work on an s390 GNU/Linux system that
1895include a 2.6.8-rc1 kernel. Ref PR breakpoints/1702.
3c0b7db2 1896
7243600a
BF
1897* Cygwin support for DWARF 2 added.
1898
6f606e1c
MK
1899* New native configurations
1900
97dc871c 1901GNU/Linux/hppa hppa*-*-linux*
0e56aeaf 1902OpenBSD/hppa hppa*-*-openbsd*
bf2ca189
MK
1903OpenBSD/m68k m68*-*-openbsd*
1904OpenBSD/m88k m88*-*-openbsd*
d195bc9f 1905OpenBSD/powerpc powerpc-*-openbsd*
6f606e1c 1906NetBSD/vax vax-*-netbsd*
9f076e7a 1907OpenBSD/vax vax-*-openbsd*
6f606e1c 1908
a1b461bf
AC
1909* END-OF-LIFE frame compatibility module
1910
1911GDB's internal frame infrastructure has been completely rewritten.
1912The new infrastructure making it possible to support key new features
1913including DWARF 2 Call Frame Information. To aid in the task of
1914migrating old configurations to this new infrastructure, a
1915compatibility module, that allowed old configurations to continue to
1916work, was also included.
1917
1918GDB 6.2 will be the last release to include this frame compatibility
1919module. This change directly impacts the following configurations:
1920
1921h8300-*-*
1922mcore-*-*
1923mn10300-*-*
1924ns32k-*-*
1925sh64-*-*
1926v850-*-*
1927xstormy16-*-*
1928
1929Unless there is activity to revive these configurations, they will be
1930made OBSOLETE in GDB 6.3, and REMOVED from GDB 6.4.
1931
3c7012f5
AC
1932* REMOVED configurations and files
1933
1934Sun 3, running SunOS 3 m68*-*-sunos3*
1935Sun 3, running SunOS 4 m68*-*-sunos4*
1936Sun 2, running SunOS 3 m68000-*-sunos3*
1937Sun 2, running SunOS 4 m68000-*-sunos4*
1938Motorola 680x0 running LynxOS m68*-*-lynxos*
1939AT&T 3b1/Unix pc m68*-att-*
1940Bull DPX2 (68k, System V release 3) m68*-bull-sysv*
1941decstation mips-dec-* mips-little-*
1942riscos mips-*-riscos* mips-*-sysv*
1943sonymips mips-sony-*
1944sysv mips*-*-sysv4* (IRIX 5/6 not included)
1945
e5fe55f7
AC
1946*** Changes in GDB 6.1.1:
1947
1948* TUI (Text-mode User Interface) built-in (also included in GDB 6.1)
1949
1950The TUI (Text-mode User Interface) is now built as part of a default
1951GDB configuration. It is enabled by either selecting the TUI with the
1952command line option "-i=tui" or by running the separate "gdbtui"
1953program. For more information on the TUI, see the manual "Debugging
1954with GDB".
1955
1956* Pending breakpoint support (also included in GDB 6.1)
1957
1958Support has been added to allow you to specify breakpoints in shared
1959libraries that have not yet been loaded. If a breakpoint location
1960cannot be found, and the "breakpoint pending" option is set to auto,
1961GDB queries you if you wish to make the breakpoint pending on a future
1962shared-library load. If and when GDB resolves the breakpoint symbol,
1963the pending breakpoint is removed as one or more regular breakpoints
1964are created.
1965
1966Pending breakpoints are very useful for GCJ Java debugging.
1967
1968* Fixed ISO-C build problems
1969
1970The files bfd/elf-bfd.h, gdb/dictionary.c and gdb/types.c contained
1971non ISO-C code that stopped them being built using a more strict ISO-C
1972compiler (e.g., IBM's C compiler).
1973
1974* Fixed build problem on IRIX 5
1975
1976Due to header problems with <sys/proc.h>, the file gdb/proc-api.c
1977wasn't able to compile compile on an IRIX 5 system.
1978
1979* Added execute permission to gdb/gdbserver/configure
1980
1981The shell script gdb/testsuite/gdb.stabs/configure lacked execute
1982permission. This bug would cause configure to fail on a number of
1983systems (Solaris, IRIX). Ref: server/519.
1984
1985* Fixed build problem on hpux2.0w-hp-hpux11.00 using the HP ANSI C compiler
1986
1987Older HPUX ANSI C compilers did not accept variable array sizes. somsolib.c
1988has been updated to use constant array sizes.
1989
1990* Fixed a panic in the DWARF Call Frame Info code on Solaris 2.7
1991
1992GCC 3.3.2, on Solaris 2.7, includes the DW_EH_PE_funcrel encoding in
1993its generated DWARF Call Frame Info. This encoding was causing GDB to
1994panic, that panic has been fixed. Ref: gdb/1628.
1995
1996* Fixed a problem when examining parameters in shared library code.
1997
1998When examining parameters in optimized shared library code generated
1999by a mainline GCC, GDB would incorrectly report ``Variable "..." is
2000not available''. GDB now correctly displays the variable's value.
2001
faae5abe 2002*** Changes in GDB 6.1:
f2c06f52 2003
9175c9a3
MC
2004* Removed --with-mmalloc
2005
2006Support for the mmalloc memory manager has been removed, as it
2007conflicted with the internal gdb byte cache.
2008
3cc87ec0
MK
2009* Changes in AMD64 configurations
2010
2011The AMD64 target now includes the %cs and %ss registers. As a result
2012the AMD64 remote protocol has changed; this affects the floating-point
2013and SSE registers. If you rely on those registers for your debugging,
2014you should upgrade gdbserver on the remote side.
2015
f0424ef6
MK
2016* Revised SPARC target
2017
2018The SPARC target has been completely revised, incorporating the
2019FreeBSD/sparc64 support that was added for GDB 6.0. As a result
03cebad2
MK
2020support for LynxOS and SunOS 4 has been dropped. Calling functions
2021from within GDB on operating systems with a non-executable stack
2022(Solaris, OpenBSD) now works.
f0424ef6 2023
59659be2
ILT
2024* New C++ demangler
2025
2026GDB has a new C++ demangler which does a better job on the mangled
2027names generated by current versions of g++. It also runs faster, so
2028with this and other changes gdb should now start faster on large C++
2029programs.
2030
9e08b29b
DJ
2031* DWARF 2 Location Expressions
2032
2033GDB support for location expressions has been extended to support function
2034arguments and frame bases. Older versions of GDB could crash when they
2035encountered these.
2036
8dfe8985
DC
2037* C++ nested types and namespaces
2038
2039GDB's support for nested types and namespaces in C++ has been
2040improved, especially if you use the DWARF 2 debugging format. (This
2041is the default for recent versions of GCC on most platforms.)
2042Specifically, if you have a class "Inner" defined within a class or
2043namespace "Outer", then GDB realizes that the class's name is
2044"Outer::Inner", not simply "Inner". This should greatly reduce the
2045frequency of complaints about not finding RTTI symbols. In addition,
2046if you are stopped at inside of a function defined within a namespace,
2047GDB modifies its name lookup accordingly.
2048
cced5e27
MK
2049* New native configurations
2050
2051NetBSD/amd64 x86_64-*-netbsd*
27d1e716 2052OpenBSD/amd64 x86_64-*-openbsd*
2031c21a 2053OpenBSD/alpha alpha*-*-openbsd*
f2cab569
MK
2054OpenBSD/sparc sparc-*-openbsd*
2055OpenBSD/sparc64 sparc64-*-openbsd*
cced5e27 2056
b4b4b794
KI
2057* New debugging protocols
2058
2059M32R with SDI protocol m32r-*-elf*
2060
7989c619
AC
2061* "set prompt-escape-char" command deleted.
2062
2063The command "set prompt-escape-char" has been deleted. This command,
2064and its very obscure effet on GDB's prompt, was never documented,
2065tested, nor mentioned in the NEWS file.
2066
5994185b
AC
2067* OBSOLETE configurations and files
2068
2069Configurations that have been declared obsolete in this release have
2070been commented out. Unless there is activity to revive these
2071configurations, the next release of GDB will have their sources
2072permanently REMOVED.
2073
2074Sun 3, running SunOS 3 m68*-*-sunos3*
2075Sun 3, running SunOS 4 m68*-*-sunos4*
2076Sun 2, running SunOS 3 m68000-*-sunos3*
2077Sun 2, running SunOS 4 m68000-*-sunos4*
2078Motorola 680x0 running LynxOS m68*-*-lynxos*
2079AT&T 3b1/Unix pc m68*-att-*
2080Bull DPX2 (68k, System V release 3) m68*-bull-sysv*
0748d941
AC
2081decstation mips-dec-* mips-little-*
2082riscos mips-*-riscos* mips-*-sysv*
2083sonymips mips-sony-*
2084sysv mips*-*-sysv4* (IRIX 5/6 not included)
5994185b 2085
0ddabb4c
AC
2086* REMOVED configurations and files
2087
2088SGI Irix-4.x mips-sgi-irix4 or iris4
2089SGI Iris (MIPS) running Irix V3: mips-sgi-irix or iris
4a8269c0
AC
2090Z8000 simulator z8k-zilog-none or z8ksim
2091Matsushita MN10200 w/simulator mn10200-*-*
2092H8/500 simulator h8500-hitachi-hms or h8500hms
2093HP/PA running BSD hppa*-*-bsd*
2094HP/PA running OSF/1 hppa*-*-osf*
2095HP/PA Pro target hppa*-*-pro*
2096PMAX (MIPS) running Mach 3.0 mips*-*-mach3*
cf7c5c23 2097386BSD i[3456]86-*-bsd*
4a8269c0
AC
2098Sequent family i[3456]86-sequent-sysv4*
2099 i[3456]86-sequent-sysv*
2100 i[3456]86-sequent-bsd*
f0424ef6
MK
2101SPARC running LynxOS sparc-*-lynxos*
2102SPARC running SunOS 4 sparc-*-sunos4*
4a8269c0
AC
2103Tsqware Sparclet sparclet-*-*
2104Fujitsu SPARClite sparclite-fujitsu-none or sparclite
0ddabb4c 2105
c7f1390e
DJ
2106*** Changes in GDB 6.0:
2107
1fe43d45
AC
2108* Objective-C
2109
2110Support for debugging the Objective-C programming language has been
2111integrated into GDB.
2112
e6beb428
AC
2113* New backtrace mechanism (includes DWARF 2 Call Frame Information).
2114
2115DWARF 2's Call Frame Information makes available compiler generated
2116information that more exactly describes the program's run-time stack.
2117By using this information, GDB is able to provide more robust stack
2118backtraces.
2119
2120The i386, amd64 (nee, x86-64), Alpha, m68hc11, ia64, and m32r targets
2121have been updated to use a new backtrace mechanism which includes
2122DWARF 2 CFI support.
2123
2124* Hosted file I/O.
2125
2126GDB's remote protocol has been extended to include support for hosted
2127file I/O (where the remote target uses GDB's file system). See GDB's
2128remote protocol documentation for details.
2129
2130* All targets using the new architecture framework.
2131
2132All of GDB's targets have been updated to use the new internal
2133architecture framework. The way is now open for future GDB releases
2134to include cross-architecture native debugging support (i386 on amd64,
2135ppc32 on ppc64).
2136
2137* GNU/Linux's Thread Local Storage (TLS)
2138
2139GDB now includes support for for the GNU/Linux implementation of
2140per-thread variables.
2141
2142* GNU/Linux's Native POSIX Thread Library (NPTL)
2143
2144GDB's thread code has been updated to work with either the new
2145GNU/Linux NPTL thread library or the older "LinuxThreads" library.
2146
2147* Separate debug info.
2148
2149GDB, in conjunction with BINUTILS, now supports a mechanism for
2150automatically loading debug information from a separate file. Instead
2151of shipping full debug and non-debug versions of system libraries,
2152system integrators can now instead ship just the stripped libraries
2153and optional debug files.
2154
2155* DWARF 2 Location Expressions
2156
2157DWARF 2 Location Expressions allow the compiler to more completely
2158describe the location of variables (even in optimized code) to the
2159debugger.
2160
2161GDB now includes preliminary support for location expressions (support
2162for DW_OP_piece is still missing).
2163
2164* Java
2165
2166A number of long standing bugs that caused GDB to die while starting a
2167Java application have been fixed. GDB's Java support is now
2168considered "useable".
2169
85f8f974
DJ
2170* GNU/Linux support for fork, vfork, and exec.
2171
2172The "catch fork", "catch exec", "catch vfork", and "set follow-fork-mode"
2173commands are now implemented for GNU/Linux. They require a 2.5.x or later
2174kernel.
2175
0fac0b41
DJ
2176* GDB supports logging output to a file
2177
2178There are two new commands, "set logging" and "show logging", which can be
2179used to capture GDB's output to a file.
f2c06f52 2180
6ad8ae5c
DJ
2181* The meaning of "detach" has changed for gdbserver
2182
2183The "detach" command will now resume the application, as documented. To
2184disconnect from gdbserver and leave it stopped, use the new "disconnect"
2185command.
2186
e286caf2 2187* d10v, m68hc11 `regs' command deprecated
5f601589
AC
2188
2189The `info registers' command has been updated so that it displays the
2190registers using a format identical to the old `regs' command.
2191
d28f9cdf
DJ
2192* Profiling support
2193
2194A new command, "maint set profile on/off", has been added. This command can
2195be used to enable or disable profiling while running GDB, to profile a
2196session or a set of commands. In addition there is a new configure switch,
2197"--enable-profiling", which will cause GDB to be compiled with profiling
2198data, for more informative profiling results.
2199
da0f9dcd
AC
2200* Default MI syntax changed to "mi2".
2201
2202The default MI (machine interface) syntax, enabled by the command line
2203option "-i=mi", has been changed to "mi2". The previous MI syntax,
b68767c1 2204"mi1", can be enabled by specifying the option "-i=mi1".
da0f9dcd
AC
2205
2206Support for the original "mi0" syntax (included in GDB 5.0) has been
2207removed.
2208
fb9b6b35
JJ
2209Fix for gdb/192: removed extraneous space when displaying frame level.
2210Fix for gdb/672: update changelist is now output in mi list format.
2211Fix for gdb/702: a -var-assign that updates the value now shows up
2212 in a subsequent -var-update.
2213
954a4db8
MK
2214* New native configurations.
2215
2216FreeBSD/amd64 x86_64-*-freebsd*
2217
6760f9e6
JB
2218* Multi-arched targets.
2219
b4263afa 2220HP/PA HPUX11 hppa*-*-hpux*
85a453d5 2221Renesas M32R/D w/simulator m32r-*-elf*
6760f9e6 2222
1b831c93
AC
2223* OBSOLETE configurations and files
2224
2225Configurations that have been declared obsolete in this release have
2226been commented out. Unless there is activity to revive these
2227configurations, the next release of GDB will have their sources
2228permanently REMOVED.
2229
8b0e5691 2230Z8000 simulator z8k-zilog-none or z8ksim
67f16606 2231Matsushita MN10200 w/simulator mn10200-*-*
fd2299bd 2232H8/500 simulator h8500-hitachi-hms or h8500hms
56056df7
AC
2233HP/PA running BSD hppa*-*-bsd*
2234HP/PA running OSF/1 hppa*-*-osf*
2235HP/PA Pro target hppa*-*-pro*
78c43945 2236PMAX (MIPS) running Mach 3.0 mips*-*-mach3*
2fbce691
AC
2237Sequent family i[3456]86-sequent-sysv4*
2238 i[3456]86-sequent-sysv*
2239 i[3456]86-sequent-bsd*
f81824a9
AC
2240Tsqware Sparclet sparclet-*-*
2241Fujitsu SPARClite sparclite-fujitsu-none or sparclite
fd2299bd 2242
5835abe7
NC
2243* REMOVED configurations and files
2244
2245V850EA ISA
1b831c93
AC
2246Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88
2247IBM AIX PS/2 i[3456]86-*-aix
2248i386 running Mach 3.0 i[3456]86-*-mach3*
2249i386 running Mach i[3456]86-*-mach*
2250i386 running OSF/1 i[3456]86-*osf1mk*
2251HP/Apollo 68k Family m68*-apollo*-sysv*,
2252 m68*-apollo*-bsd*,
2253 m68*-hp-bsd*, m68*-hp-hpux*
2254Argonaut Risc Chip (ARC) arc-*-*
2255Mitsubishi D30V d30v-*-*
2256Fujitsu FR30 fr30-*-elf*
2257OS/9000 i[34]86-*-os9k
2258I960 with MON960 i960-*-coff
5835abe7 2259
a094c6fb
AC
2260* MIPS $fp behavior changed
2261
2262The convenience variable $fp, for the MIPS, now consistently returns
2263the address of the current frame's base. Previously, depending on the
2264context, $fp could refer to either $sp or the current frame's base
2265address. See ``8.10 Registers'' in the manual ``Debugging with GDB:
2266The GNU Source-Level Debugger''.
2267
299ffc64 2268*** Changes in GDB 5.3:
37057839 2269
46248966
AC
2270* GNU/Linux shared library multi-threaded performance improved.
2271
2272When debugging a multi-threaded application on GNU/Linux, GDB now uses
2273`/proc', in preference to `ptrace' for memory reads. This may result
2274in an improvement in the start-up time of multi-threaded, shared
2275library applications when run under GDB. One GDB user writes: ``loads
2276shared libs like mad''.
2277
b9d14705 2278* ``gdbserver'' now supports multi-threaded applications on some targets
6da02953 2279
b9d14705
DJ
2280Support for debugging multi-threaded applications which use
2281the GNU/Linux LinuxThreads package has been added for
2282arm*-*-linux*-gnu*, i[3456]86-*-linux*-gnu*, mips*-*-linux*-gnu*,
2283powerpc*-*-linux*-gnu*, and sh*-*-linux*-gnu*.
6da02953 2284
e0e9281e
JB
2285* GDB now supports C/C++ preprocessor macros.
2286
2287GDB now expands preprocessor macro invocations in C/C++ expressions,
2288and provides various commands for showing macro definitions and how
2289they expand.
2290
dd73b9bb
AC
2291The new command `macro expand EXPRESSION' expands any macro
2292invocations in expression, and shows the result.
2293
2294The new command `show macro MACRO-NAME' shows the definition of the
2295macro named MACRO-NAME, and where it was defined.
2296
e0e9281e
JB
2297Most compilers don't include information about macros in the debugging
2298information by default. In GCC 3.1, for example, you need to compile
2299your program with the options `-gdwarf-2 -g3'. If the macro
2300information is present in the executable, GDB will read it.
2301
2250ee0c
CV
2302* Multi-arched targets.
2303
6e3ba3b8
JT
2304DEC Alpha (partial) alpha*-*-*
2305DEC VAX (partial) vax-*-*
2250ee0c 2306NEC V850 v850-*-*
6e3ba3b8 2307National Semiconductor NS32000 (partial) ns32k-*-*
a1789893
GS
2308Motorola 68000 (partial) m68k-*-*
2309Motorola MCORE mcore-*-*
2250ee0c 2310
cd9bfe15 2311* New targets.
e33ce519 2312
456f8b9d
DB
2313Fujitsu FRV architecture added by Red Hat frv*-*-*
2314
e33ce519 2315
da8ca43d
JT
2316* New native configurations
2317
2318Alpha NetBSD alpha*-*-netbsd*
029923d4 2319SH NetBSD sh*-*-netbsdelf*
45888261 2320MIPS NetBSD mips*-*-netbsd*
9ce5c36a 2321UltraSPARC NetBSD sparc64-*-netbsd*
da8ca43d 2322
cd9bfe15
AC
2323* OBSOLETE configurations and files
2324
2325Configurations that have been declared obsolete in this release have
2326been commented out. Unless there is activity to revive these
2327configurations, the next release of GDB will have their sources
2328permanently REMOVED.
2329
92eb23c5 2330Mitsubishi D30V d30v-*-*
a99a9e1b 2331OS/9000 i[34]86-*-os9k
1c7cc583 2332IBM AIX PS/2 i[3456]86-*-aix
7a3085c1 2333Fujitsu FR30 fr30-*-elf*
7fb623f7 2334Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88
eb4c54a2 2335Argonaut Risc Chip (ARC) arc-*-*
d8ee244c
MK
2336i386 running Mach 3.0 i[3456]86-*-mach3*
2337i386 running Mach i[3456]86-*-mach*
2338i386 running OSF/1 i[3456]86-*osf1mk*
822e978b
AC
2339HP/Apollo 68k Family m68*-apollo*-sysv*,
2340 m68*-apollo*-bsd*,
2341 m68*-hp-bsd*, m68*-hp-hpux*
4d210288 2342I960 with MON960 i960-*-coff
92eb23c5 2343
db034ac5
AC
2344* OBSOLETE languages
2345
2346CHILL, a Pascal like language used by telecommunications companies.
2347
cd9bfe15
AC
2348* REMOVED configurations and files
2349
2350AMD 29k family via UDI a29k-amd-udi, udi29k
2351A29K VxWorks a29k-*-vxworks
2352AMD 29000 embedded, using EBMON a29k-none-none
2353AMD 29000 embedded with COFF a29k-none-coff
2354AMD 29000 embedded with a.out a29k-none-aout
2355
2356testsuite/gdb.hp/gdb.threads-hp/ directory
2357
20f01a46
DH
2358* New command "set max-user-call-depth <nnn>"
2359
2360This command allows the user to limit the call depth of user-defined
2361commands. The default is 1024.
2362
a5941fbf
MK
2363* Changes in FreeBSD/i386 native debugging.
2364
2365Support for the "generate-core-file" has been added.
2366
89743e04
MS
2367* New commands "dump", "append", and "restore".
2368
2369These commands allow data to be copied from target memory
2370to a bfd-format or binary file (dump and append), and back
2371from a file into memory (restore).
37057839 2372
9fb14e79
JB
2373* Improved "next/step" support on multi-processor Alpha Tru64.
2374
2375The previous single-step mechanism could cause unpredictable problems,
2376including the random appearance of SIGSEGV or SIGTRAP signals. The use
2377of a software single-step mechanism prevents this.
2378
2037aebb
AC
2379*** Changes in GDB 5.2.1:
2380
2381* New targets.
2382
2383Atmel AVR avr*-*-*
2384
2385* Bug fixes
2386
2387gdb/182: gdb/323: gdb/237: On alpha, gdb was reporting:
2388mdebugread.c:2443: gdb-internal-error: sect_index_data not initialized
2389Fix, by Joel Brobecker imported from mainline.
2390
2391gdb/439: gdb/291: On some ELF object files, gdb was reporting:
2392dwarf2read.c:1072: gdb-internal-error: sect_index_text not initialize
2393Fix, by Fred Fish, imported from mainline.
2394
2395Dwarf2 .debug_frame & .eh_frame handler improved in many ways.
2396Surprisingly enough, it works now.
2397By Michal Ludvig, imported from mainline.
2398
2399i386 hardware watchpoint support:
2400avoid misses on second run for some targets.
2401By Pierre Muller, imported from mainline.
2402
37057839 2403*** Changes in GDB 5.2:
eb7cedd9 2404
1a703748
MS
2405* New command "set trust-readonly-sections on[off]".
2406
2407This command is a hint that tells gdb that read-only sections
2408really are read-only (ie. that their contents will not change).
2409In this mode, gdb will go to the object file rather than the
2410target to read memory from read-only sections (such as ".text").
2411This can be a significant performance improvement on some
2412(notably embedded) targets.
2413
cefd4ef5
MS
2414* New command "generate-core-file" (or "gcore").
2415
55241689
AC
2416This new gdb command allows the user to drop a core file of the child
2417process state at any time. So far it's been implemented only for
2418GNU/Linux and Solaris, but should be relatively easily ported to other
2419hosts. Argument is core file name (defaults to core.<pid>).
cefd4ef5 2420
352ed7b4
MS
2421* New command line option
2422
2423GDB now accepts --pid or -p followed by a process id.
2424
2425* Change in command line behavior -- corefiles vs. process ids.
2426
2427There is a subtle behavior in the way in which GDB handles
2428command line arguments. The first non-flag argument is always
2429a program to debug, but the second non-flag argument may either
2430be a corefile or a process id. Previously, GDB would attempt to
2431open the second argument as a corefile, and if that failed, would
2432issue a superfluous error message and then attempt to attach it as
2433a process. Now, if the second argument begins with a non-digit,
2434it will be treated as a corefile. If it begins with a digit,
2435GDB will attempt to attach it as a process, and if no such process
2436is found, will then attempt to open it as a corefile.
2437
fe419ffc
RE
2438* Changes in ARM configurations.
2439
2440Multi-arch support is enabled for all ARM configurations. The ARM/NetBSD
2441configuration is fully multi-arch.
2442
eb7cedd9
MK
2443* New native configurations
2444
fe419ffc 2445ARM NetBSD arm*-*-netbsd*
eb7cedd9 2446x86 OpenBSD i[3456]86-*-openbsd*
55241689 2447AMD x86-64 running GNU/Linux x86_64-*-linux-*
768f0842 2448Sparc64 running FreeBSD sparc64-*-freebsd*
eb7cedd9 2449
c9f63e6b
CV
2450* New targets
2451
2452Sanyo XStormy16 xstormy16-elf
2453
9b4ff276
AC
2454* OBSOLETE configurations and files
2455
2456Configurations that have been declared obsolete in this release have
2457been commented out. Unless there is activity to revive these
2458configurations, the next release of GDB will have their sources
2459permanently REMOVED.
2460
2461AMD 29k family via UDI a29k-amd-udi, udi29k
2462A29K VxWorks a29k-*-vxworks
2463AMD 29000 embedded, using EBMON a29k-none-none
2464AMD 29000 embedded with COFF a29k-none-coff
2465AMD 29000 embedded with a.out a29k-none-aout
2466
b4ceaee6 2467testsuite/gdb.hp/gdb.threads-hp/ directory
9b4ff276 2468
e2caac18
AC
2469* REMOVED configurations and files
2470
2471TI TMS320C80 tic80-*-*
7bc65f05 2472WDC 65816 w65-*-*
7768dd6c
AC
2473PowerPC Solaris powerpcle-*-solaris*
2474PowerPC Windows NT powerpcle-*-cygwin32
2475PowerPC Netware powerpc-*-netware*
5e734e1f 2476Harris/CXUX m88k m88*-harris-cxux*
1406caf7
AC
2477Most ns32k hosts and targets ns32k-*-mach3* ns32k-umax-*
2478 ns32k-utek-sysv* ns32k-utek-*
7e24f0b1 2479SunOS 4.0.Xi on i386 i[3456]86-*-sunos*
9b567150 2480Ultracomputer (29K) running Sym1 a29k-nyu-sym1 a29k-*-kern*
3680c638
AC
2481Sony NEWS (68K) running NEWSOS 3.x m68*-sony-sysv news
2482ISI Optimum V (3.05) under 4.3bsd. m68*-isi-*
a752853e 2483Apple Macintosh (MPW) host and target N/A host, powerpc-*-macos*
e2caac18 2484
c2a727fa
TT
2485* Changes to command line processing
2486
2487The new `--args' feature can be used to specify command-line arguments
2488for the inferior from gdb's command line.
2489
467d8519
TT
2490* Changes to key bindings
2491
2492There is a new `operate-and-get-next' function bound to `C-o'.
2493
7072a954
AC
2494*** Changes in GDB 5.1.1
2495
2496Fix compile problem on DJGPP.
2497
2498Fix a problem with floating-point registers on the i386 being
2499corrupted.
2500
2501Fix to stop GDB crashing on .debug_str debug info.
2502
2503Numerous documentation fixes.
2504
2505Numerous testsuite fixes.
2506
34f47bc4 2507*** Changes in GDB 5.1:
139760b7
MK
2508
2509* New native configurations
2510
2511Alpha FreeBSD alpha*-*-freebsd*
2512x86 FreeBSD 3.x and 4.x i[3456]86*-freebsd[34]*
55241689 2513MIPS GNU/Linux mips*-*-linux*
e23194cb
EZ
2514MIPS SGI Irix 6.x mips*-sgi-irix6*
2515ia64 AIX ia64-*-aix*
55241689 2516s390 and s390x GNU/Linux {s390,s390x}-*-linux*
139760b7 2517
bf64bfd6
AC
2518* New targets
2519
def90278 2520Motorola 68HC11 and 68HC12 m68hc11-elf
24be5c34 2521CRIS cris-axis
55241689 2522UltraSparc running GNU/Linux sparc64-*-linux*
def90278 2523
17e78a56 2524* OBSOLETE configurations and files
bf64bfd6
AC
2525
2526x86 FreeBSD before 2.2 i[3456]86*-freebsd{1,2.[01]}*,
9b9c068d 2527Harris/CXUX m88k m88*-harris-cxux*
bb19ff3b
AC
2528Most ns32k hosts and targets ns32k-*-mach3* ns32k-umax-*
2529 ns32k-utek-sysv* ns32k-utek-*
76f4ea53
AC
2530TI TMS320C80 tic80-*-*
2531WDC 65816 w65-*-*
4a1968f4 2532Ultracomputer (29K) running Sym1 a29k-nyu-sym1 a29k-*-kern*
1b2b2c16
AC
2533PowerPC Solaris powerpcle-*-solaris*
2534PowerPC Windows NT powerpcle-*-cygwin32
2535PowerPC Netware powerpc-*-netware*
24f89b68 2536SunOS 4.0.Xi on i386 i[3456]86-*-sunos*
514e603d
AC
2537Sony NEWS (68K) running NEWSOS 3.x m68*-sony-sysv news
2538ISI Optimum V (3.05) under 4.3bsd. m68*-isi-*
d036b4d9 2539Apple Macintosh (MPW) host N/A
bf64bfd6 2540
17e78a56
AC
2541stuff.c (Program to stuff files into a specially prepared space in kdb)
2542kdb-start.c (Main loop for the standalone kernel debugger)
2543
7fcca85b
AC
2544Configurations that have been declared obsolete in this release have
2545been commented out. Unless there is activity to revive these
2546configurations, the next release of GDB will have their sources
2547permanently REMOVED.
2548
a196c81c 2549* REMOVED configurations and files
7fcca85b
AC
2550
2551Altos 3068 m68*-altos-*
2552Convex c1-*-*, c2-*-*
2553Pyramid pyramid-*-*
2554ARM RISCix arm-*-* (as host)
2555Tahoe tahoe-*-*
a196c81c 2556ser-ocd.c *-*-*
bf64bfd6 2557
6d6b80e5 2558* GDB has been converted to ISO C.
e23194cb 2559
6d6b80e5 2560GDB's source code has been converted to ISO C. In particular, the
e23194cb
EZ
2561sources are fully protoized, and rely on standard headers being
2562present.
2563
bf64bfd6
AC
2564* Other news:
2565
e23194cb
EZ
2566* "info symbol" works on platforms which use COFF, ECOFF, XCOFF, and NLM.
2567
2568* The MI enabled by default.
2569
2570The new machine oriented interface (MI) introduced in GDB 5.0 has been
2571revised and enabled by default. Packages which use GDB as a debugging
2572engine behind a UI or another front end are encouraged to switch to
2573using the GDB/MI interface, instead of the old annotations interface
2574which is now deprecated.
2575
2576* Support for debugging Pascal programs.
2577
2578GDB now includes support for debugging Pascal programs. The following
2579main features are supported:
2580
2581 - Pascal-specific data types such as sets;
2582
2583 - automatic recognition of Pascal sources based on file-name
2584 extension;
2585
2586 - Pascal-style display of data types, variables, and functions;
2587
2588 - a Pascal expression parser.
2589
2590However, some important features are not yet supported.
2591
2592 - Pascal string operations are not supported at all;
2593
2594 - there are some problems with boolean types;
2595
2596 - Pascal type hexadecimal constants are not supported
2597 because they conflict with the internal variables format;
2598
2599 - support for Pascal objects and classes is not full yet;
2600
2601 - unlike Pascal, GDB is case-sensitive for symbol names.
2602
2603* Changes in completion.
2604
2605Commands such as `shell', `run' and `set args', which pass arguments
2606to inferior programs, now complete on file names, similar to what
2607users expect at the shell prompt.
2608
2609Commands which accept locations, such as `disassemble', `print',
2610`breakpoint', `until', etc. now complete on filenames as well as
2611program symbols. Thus, if you type "break foob TAB", and the source
2612files linked into the programs include `foobar.c', that file name will
2613be one of the candidates for completion. However, file names are not
2614considered for completion after you typed a colon that delimits a file
2615name from a name of a function in that file, as in "break foo.c:bar".
2616
2617`set demangle-style' completes on available demangling styles.
2618
2619* New platform-independent commands:
2620
2621It is now possible to define a post-hook for a command as well as a
2622hook that runs before the command. For more details, see the
2623documentation of `hookpost' in the GDB manual.
2624
2625* Changes in GNU/Linux native debugging.
2626
d7275149
MK
2627Support for debugging multi-threaded programs has been completely
2628revised for all platforms except m68k and sparc. You can now debug as
2629many threads as your system allows you to have.
2630
e23194cb
EZ
2631Attach/detach is supported for multi-threaded programs.
2632
d7275149
MK
2633Support for SSE registers was added for x86. This doesn't work for
2634multi-threaded programs though.
e23194cb
EZ
2635
2636* Changes in MIPS configurations.
bf64bfd6
AC
2637
2638Multi-arch support is enabled for all MIPS configurations.
2639
e23194cb
EZ
2640GDB can now be built as native debugger on SGI Irix 6.x systems for
2641debugging n32 executables. (Debugging 64-bit executables is not yet
2642supported.)
2643
2644* Unified support for hardware watchpoints in all x86 configurations.
2645
2646Most (if not all) native x86 configurations support hardware-assisted
2647breakpoints and watchpoints in a unified manner. This support
2648implements debug register sharing between watchpoints, which allows to
2649put a virtually infinite number of watchpoints on the same address,
2650and also supports watching regions up to 16 bytes with several debug
2651registers.
2652
2653The new maintenance command `maintenance show-debug-regs' toggles
2654debugging print-outs in functions that insert, remove, and test
2655watchpoints and hardware breakpoints.
2656
2657* Changes in the DJGPP native configuration.
2658
2659New command ``info dos sysinfo'' displays assorted information about
2660the CPU, OS, memory, and DPMI server.
2661
2662New commands ``info dos gdt'', ``info dos ldt'', and ``info dos idt''
2663display information about segment descriptors stored in GDT, LDT, and
2664IDT.
2665
2666New commands ``info dos pde'' and ``info dos pte'' display entries
2667from Page Directory and Page Tables (for now works with CWSDPMI only).
2668New command ``info dos address-pte'' displays the Page Table entry for
2669a given linear address.
2670
2671GDB can now pass command lines longer than 126 characters to the
2672program being debugged (requires an update to the libdbg.a library
2673which is part of the DJGPP development kit).
2674
2675DWARF2 debug info is now supported.
2676
6c56c069
EZ
2677It is now possible to `step' and `next' through calls to `longjmp'.
2678
e23194cb
EZ
2679* Changes in documentation.
2680
2681All GDB documentation was converted to GFDL, the GNU Free
2682Documentation License.
2683
2684Tracepoints-related commands are now fully documented in the GDB
2685manual.
2686
2687TUI, the Text-mode User Interface, is now documented in the manual.
2688
2689Tracepoints-related commands are now fully documented in the GDB
2690manual.
2691
2692The "GDB Internals" manual now has an index. It also includes
2693documentation of `ui_out' functions, GDB coding standards, x86
2694hardware watchpoints, and memory region attributes.
2695
5d6640b1
AC
2696* GDB's version number moved to ``version.in''
2697
2698The Makefile variable VERSION has been replaced by the file
2699``version.in''. People creating GDB distributions should update the
2700contents of this file.
2701
1a1d8446
AC
2702* gdba.el deleted
2703
2704GUD support is now a standard part of the EMACS distribution.
139760b7 2705
9debab2f 2706*** Changes in GDB 5.0:
7a292a7a 2707
c63ce875
EZ
2708* Improved support for debugging FP programs on x86 targets
2709
2710Unified and much-improved support for debugging floating-point
2711programs on all x86 targets. In particular, ``info float'' now
2712displays the FP registers in the same format on all x86 targets, with
2713greater level of detail.
2714
2715* Improvements and bugfixes in hardware-assisted watchpoints
2716
2717It is now possible to watch array elements, struct members, and
2718bitfields with hardware-assisted watchpoints. Data-read watchpoints
2719on x86 targets no longer erroneously trigger when the address is
2720written.
2721
2722* Improvements in the native DJGPP version of GDB
2723
2724The distribution now includes all the scripts and auxiliary files
2725necessary to build the native DJGPP version on MS-DOS/MS-Windows
2726machines ``out of the box''.
2727
2728The DJGPP version can now debug programs that use signals. It is
2729possible to catch signals that happened in the debuggee, deliver
2730signals to it, interrupt it with Ctrl-C, etc. (Previously, a signal
2731would kill the program being debugged.) Programs that hook hardware
2732interrupts (keyboard, timer, etc.) can also be debugged.
2733
2734It is now possible to debug DJGPP programs that redirect their
2735standard handles or switch them to raw (as opposed to cooked) mode, or
2736even close them. The command ``run < foo > bar'' works as expected,
2737and ``info terminal'' reports useful information about the debuggee's
2738terminal, including raw/cooked mode, redirection, etc.
2739
2740The DJGPP version now uses termios functions for console I/O, which
2741enables debugging graphics programs. Interrupting GDB with Ctrl-C
2742also works.
2743
2744DOS-style file names with drive letters are now fully supported by
2745GDB.
2746
2747It is now possible to debug DJGPP programs that switch their working
2748directory. It is also possible to rerun the debuggee any number of
2749times without restarting GDB; thus, you can use the same setup,
2750breakpoints, etc. for many debugging sessions.
2751
ed9a39eb
JM
2752* New native configurations
2753
2754ARM GNU/Linux arm*-*-linux*
afc05dd4 2755PowerPC GNU/Linux powerpc-*-linux*
ed9a39eb 2756
7a292a7a
SS
2757* New targets
2758
96baa820 2759Motorola MCore mcore-*-*
adf40b2e
JM
2760x86 VxWorks i[3456]86-*-vxworks*
2761PowerPC VxWorks powerpc-*-vxworks*
7a292a7a
SS
2762TI TMS320C80 tic80-*-*
2763
085dd6e6
JM
2764* OBSOLETE configurations
2765
2766Altos 3068 m68*-altos-*
2767Convex c1-*-*, c2-*-*
9846de1b 2768Pyramid pyramid-*-*
ed9a39eb 2769ARM RISCix arm-*-* (as host)
104c1213 2770Tahoe tahoe-*-*
7a292a7a 2771
9debab2f
AC
2772Configurations that have been declared obsolete will be commented out,
2773but the code will be left in place. If there is no activity to revive
2774these configurations before the next release of GDB, the sources will
2775be permanently REMOVED.
2776
5330533d
SS
2777* Gould support removed
2778
2779Support for the Gould PowerNode and NP1 has been removed.
2780
bc9e5bbf
AC
2781* New features for SVR4
2782
2783On SVR4 native platforms (such as Solaris), if you attach to a process
2784without first loading a symbol file, GDB will now attempt to locate and
2785load symbols from the running process's executable file.
2786
2787* Many C++ enhancements
2788
2789C++ support has been greatly improved. Overload resolution now works properly
2790in almost all cases. RTTI support is on the way.
2791
adf40b2e
JM
2792* Remote targets can connect to a sub-program
2793
2794A popen(3) style serial-device has been added. This device starts a
2795sub-process (such as a stand-alone simulator) and then communicates
2796with that. The sub-program to run is specified using the syntax
2797``|<program> <args>'' vis:
2798
2799 (gdb) set remotedebug 1
2800 (gdb) target extended-remote |mn10300-elf-sim program-args
2801
43e526b9
JM
2802* MIPS 64 remote protocol
2803
2804A long standing bug in the mips64 remote protocol where by GDB
2805expected certain 32 bit registers (ex SR) to be transfered as 32
2806instead of 64 bits has been fixed.
2807
2808The command ``set remote-mips64-transfers-32bit-regs on'' has been
2809added to provide backward compatibility with older versions of GDB.
2810
96baa820
JM
2811* ``set remotebinarydownload'' replaced by ``set remote X-packet''
2812
2813The command ``set remotebinarydownload'' command has been replaced by
2814``set remote X-packet''. Other commands in ``set remote'' family
2815include ``set remote P-packet''.
2816
11cf8741
JM
2817* Breakpoint commands accept ranges.
2818
2819The breakpoint commands ``enable'', ``disable'', and ``delete'' now
2820accept a range of breakpoints, e.g. ``5-7''. The tracepoint command
2821``tracepoint passcount'' also accepts a range of tracepoints.
2822
7876dd43
DB
2823* ``apropos'' command added.
2824
2825The ``apropos'' command searches through command names and
2826documentation strings, printing out matches, making it much easier to
2827try to find a command that does what you are looking for.
2828
bc9e5bbf
AC
2829* New MI interface
2830
2831A new machine oriented interface (MI) has been added to GDB. This
2832interface is designed for debug environments running GDB as a separate
7162c0ca
EZ
2833process. This is part of the long term libGDB project. See the
2834"GDB/MI" chapter of the GDB manual for further information. It can be
2835enabled by configuring with:
bc9e5bbf
AC
2836
2837 .../configure --enable-gdbmi
2838
c906108c
SS
2839*** Changes in GDB-4.18:
2840
2841* New native configurations
2842
2843HP-UX 10.20 hppa*-*-hpux10.20
2844HP-UX 11.x hppa*-*-hpux11.0*
55241689 2845M68K GNU/Linux m68*-*-linux*
c906108c
SS
2846
2847* New targets
2848
2849Fujitsu FR30 fr30-*-elf*
2850Intel StrongARM strongarm-*-*
2851Mitsubishi D30V d30v-*-*
2852
2853* OBSOLETE configurations
2854
2855Gould PowerNode, NP1 np1-*-*, pn-*-*
2856
2857Configurations that have been declared obsolete will be commented out,
2858but the code will be left in place. If there is no activity to revive
2859these configurations before the next release of GDB, the sources will
2860be permanently REMOVED.
2861
2862* ANSI/ISO C
2863
2864As a compatibility experiment, GDB's source files buildsym.h and
2865buildsym.c have been converted to pure standard C, no longer
2866containing any K&R compatibility code. We believe that all systems in
2867use today either come with a standard C compiler, or have a GCC port
2868available. If this is not true, please report the affected
2869configuration to bug-gdb@gnu.org immediately. See the README file for
2870information about getting a standard C compiler if you don't have one
2871already.
2872
2873* Readline 2.2
2874
2875GDB now uses readline 2.2.
2876
2877* set extension-language
2878
2879You can now control the mapping between filename extensions and source
2880languages by using the `set extension-language' command. For instance,
2881you can ask GDB to treat .c files as C++ by saying
2882 set extension-language .c c++
2883The command `info extensions' lists all of the recognized extensions
2884and their associated languages.
2885
2886* Setting processor type for PowerPC and RS/6000
2887
2888When GDB is configured for a powerpc*-*-* or an rs6000*-*-* target,
2889you can use the `set processor' command to specify what variant of the
2890PowerPC family you are debugging. The command
2891
2892 set processor NAME
2893
2894sets the PowerPC/RS6000 variant to NAME. GDB knows about the
2895following PowerPC and RS6000 variants:
2896
2897 ppc-uisa PowerPC UISA - a PPC processor as viewed by user-level code
2898 rs6000 IBM RS6000 ("POWER") architecture, user-level view
2899 403 IBM PowerPC 403
2900 403GC IBM PowerPC 403GC
2901 505 Motorola PowerPC 505
2902 860 Motorola PowerPC 860 or 850
2903 601 Motorola PowerPC 601
2904 602 Motorola PowerPC 602
2905 603 Motorola/IBM PowerPC 603 or 603e
2906 604 Motorola PowerPC 604 or 604e
2907 750 Motorola/IBM PowerPC 750 or 750
2908
2909At the moment, this command just tells GDB what to name the
2910special-purpose processor registers. Since almost all the affected
2911registers are inaccessible to user-level programs, this command is
2912only useful for remote debugging in its present form.
2913
2914* HP-UX support
2915
2916Thanks to a major code donation from Hewlett-Packard, GDB now has much
2917more extensive support for HP-UX. Added features include shared
2918library support, kernel threads and hardware watchpoints for 11.00,
2919support for HP's ANSI C and C++ compilers, and a compatibility mode
2920for xdb and dbx commands.
2921
2922* Catchpoints
2923
2924HP's donation includes the new concept of catchpoints, which is a
2925generalization of the old catch command. On HP-UX, it is now possible
2926to catch exec, fork, and vfork, as well as library loading.
2927
2928This means that the existing catch command has changed; its first
2929argument now specifies the type of catch to be set up. See the
2930output of "help catch" for a list of catchpoint types.
2931
2932* Debugging across forks
2933
2934On HP-UX, you can choose which process to debug when a fork() happens
2935in the inferior.
2936
2937* TUI
2938
2939HP has donated a curses-based terminal user interface (TUI). To get
2940it, build with --enable-tui. Although this can be enabled for any
2941configuration, at present it only works for native HP debugging.
2942
2943* GDB remote protocol additions
2944
2945A new protocol packet 'X' that writes binary data is now available.
2946Default behavior is to try 'X', then drop back to 'M' if the stub
2947fails to respond. The settable variable `remotebinarydownload'
2948allows explicit control over the use of 'X'.
2949
2950For 64-bit targets, the memory packets ('M' and 'm') can now contain a
2951full 64-bit address. The command
2952
2953 set remoteaddresssize 32
2954
2955can be used to revert to the old behaviour. For existing remote stubs
2956the change should not be noticed, as the additional address information
2957will be discarded.
2958
2959In order to assist in debugging stubs, you may use the maintenance
2960command `packet' to send any text string to the stub. For instance,
2961
2962 maint packet heythere
2963
2964sends the packet "$heythere#<checksum>". Note that it is very easy to
2965disrupt a debugging session by sending the wrong packet at the wrong
2966time.
2967
2968The compare-sections command allows you to compare section data on the
2969target to what is in the executable file without uploading or
2970downloading, by comparing CRC checksums.
2971
2972* Tracing can collect general expressions
2973
2974You may now collect general expressions at tracepoints. This requires
2975further additions to the target-side stub; see tracepoint.c and
2976doc/agentexpr.texi for further details.
2977
2978* mask-address variable for Mips
2979
2980For Mips targets, you may control the zeroing of the upper 32 bits of
2981a 64-bit address by entering `set mask-address on'. This is mainly
2982of interest to users of embedded R4xxx and R5xxx processors.
2983
2984* Higher serial baud rates
2985
2986GDB's serial code now allows you to specify baud rates 57600, 115200,
2987230400, and 460800 baud. (Note that your host system may not be able
2988to achieve all of these rates.)
2989
2990* i960 simulator
2991
2992The i960 configuration now includes an initial implementation of a
2993builtin simulator, contributed by Jim Wilson.
2994
2995
2996*** Changes in GDB-4.17:
2997
2998* New native configurations
2999
3000Alpha GNU/Linux alpha*-*-linux*
3001Unixware 2.x i[3456]86-unixware2*
3002Irix 6.x mips*-sgi-irix6*
3003PowerPC GNU/Linux powerpc-*-linux*
3004PowerPC Solaris powerpcle-*-solaris*
3005Sparc GNU/Linux sparc-*-linux*
3006Motorola sysV68 R3V7.1 m68k-motorola-sysv
3007
3008* New targets
3009
3010Argonaut Risc Chip (ARC) arc-*-*
3011Hitachi H8/300S h8300*-*-*
3012Matsushita MN10200 w/simulator mn10200-*-*
3013Matsushita MN10300 w/simulator mn10300-*-*
3014MIPS NEC VR4100 mips64*vr4100*{,el}-*-elf*
3015MIPS NEC VR5000 mips64*vr5000*{,el}-*-elf*
3016MIPS Toshiba TX39 mips64*tx39*{,el}-*-elf*
3017Mitsubishi D10V w/simulator d10v-*-*
3018Mitsubishi M32R/D w/simulator m32r-*-elf*
3019Tsqware Sparclet sparclet-*-*
3020NEC V850 w/simulator v850-*-*
3021
3022* New debugging protocols
3023
3024ARM with RDI protocol arm*-*-*
3025M68K with dBUG monitor m68*-*-{aout,coff,elf}
3026DDB and LSI variants of PMON protocol mips*-*-*
3027PowerPC with DINK32 monitor powerpc{,le}-*-eabi
3028PowerPC with SDS protocol powerpc{,le}-*-eabi
3029Macraigor OCD (Wiggler) devices powerpc{,le}-*-eabi
3030
3031* DWARF 2
3032
3033All configurations can now understand and use the DWARF 2 debugging
3034format. The choice is automatic, if the symbol file contains DWARF 2
3035information.
3036
3037* Java frontend
3038
3039GDB now includes basic Java language support. This support is
3040only useful with Java compilers that produce native machine code.
3041
3042* solib-absolute-prefix and solib-search-path
3043
3044For SunOS and SVR4 shared libraries, you may now set the prefix for
3045loading absolute shared library symbol files, and the search path for
3046locating non-absolute shared library symbol files.
3047
3048* Live range splitting
3049
3050GDB can now effectively debug code for which GCC has performed live
3051range splitting as part of its optimization. See gdb/doc/LRS for
3052more details on the expected format of the stabs information.
3053
3054* Hurd support
3055
3056GDB's support for the GNU Hurd, including thread debugging, has been
3057updated to work with current versions of the Hurd.
3058
3059* ARM Thumb support
3060
3061GDB's ARM target configuration now handles the ARM7T (Thumb) 16-bit
3062instruction set. ARM GDB automatically detects when Thumb
3063instructions are in use, and adjusts disassembly and backtracing
3064accordingly.
3065
3066* MIPS16 support
3067
3068GDB's MIPS target configurations now handle the MIP16 16-bit
3069instruction set.
3070
3071* Overlay support
3072
3073GDB now includes support for overlays; if an executable has been
3074linked such that multiple sections are based at the same address, GDB
3075will decide which section to use for symbolic info. You can choose to
3076control the decision manually, using overlay commands, or implement
3077additional target-side support and use "overlay load-target" to bring
3078in the overlay mapping. Do "help overlay" for more detail.
3079
3080* info symbol
3081
3082The command "info symbol <address>" displays information about
3083the symbol at the specified address.
3084
3085* Trace support
3086
3087The standard remote protocol now includes an extension that allows
3088asynchronous collection and display of trace data. This requires
3089extensive support in the target-side debugging stub. Tracing mode
3090includes a new interaction mode in GDB and new commands: see the
3091file tracepoint.c for more details.
3092
3093* MIPS simulator
3094
3095Configurations for embedded MIPS now include a simulator contributed
3096by Cygnus Solutions. The simulator supports the instruction sets
3097of most MIPS variants.
3098
3099* Sparc simulator
3100
3101Sparc configurations may now include the ERC32 simulator contributed
3102by the European Space Agency. The simulator is not built into
3103Sparc targets by default; configure with --enable-sim to include it.
3104
3105* set architecture
3106
3107For target configurations that may include multiple variants of a
3108basic architecture (such as MIPS and SH), you may now set the
3109architecture explicitly. "set arch" sets, "info arch" lists
3110the possible architectures.
3111
3112*** Changes in GDB-4.16:
3113
3114* New native configurations
3115
3116Windows 95, x86 Windows NT i[345]86-*-cygwin32
3117M68K NetBSD m68k-*-netbsd*
3118PowerPC AIX 4.x powerpc-*-aix*
3119PowerPC MacOS powerpc-*-macos*
3120PowerPC Windows NT powerpcle-*-cygwin32
3121RS/6000 AIX 4.x rs6000-*-aix4*
3122
3123* New targets
3124
3125ARM with RDP protocol arm-*-*
3126I960 with MON960 i960-*-coff
3127MIPS VxWorks mips*-*-vxworks*
3128MIPS VR4300 with PMON mips64*vr4300{,el}-*-elf*
3129PowerPC with PPCBUG monitor powerpc{,le}-*-eabi*
3130Hitachi SH3 sh-*-*
3131Matra Sparclet sparclet-*-*
3132
3133* PowerPC simulator
3134
3135The powerpc-eabi configuration now includes the PSIM simulator,
3136contributed by Andrew Cagney, with assistance from Mike Meissner.
3137PSIM is a very elaborate model of the PowerPC, including not only
3138basic instruction set execution, but also details of execution unit
3139performance and I/O hardware. See sim/ppc/README for more details.
3140
3141* Solaris 2.5
3142
3143GDB now works with Solaris 2.5.
3144
3145* Windows 95/NT native
3146
3147GDB will now work as a native debugger on Windows 95 and Windows NT.
3148To build it from source, you must use the "gnu-win32" environment,
3149which uses a DLL to emulate enough of Unix to run the GNU tools.
3150Further information, binaries, and sources are available at
3151ftp.cygnus.com, under pub/gnu-win32.
3152
3153* dont-repeat command
3154
3155If a user-defined command includes the command `dont-repeat', then the
3156command will not be repeated if the user just types return. This is
3157useful if the command is time-consuming to run, so that accidental
3158extra keystrokes don't run the same command many times.
3159
3160* Send break instead of ^C
3161
3162The standard remote protocol now includes an option to send a break
3163rather than a ^C to the target in order to interrupt it. By default,
3164GDB will send ^C; to send a break, set the variable `remotebreak' to 1.
3165
3166* Remote protocol timeout
3167
3168The standard remote protocol includes a new variable `remotetimeout'
3169that allows you to set the number of seconds before GDB gives up trying
3170to read from the target. The default value is 2.
3171
3172* Automatic tracking of dynamic object loading (HPUX and Solaris only)
3173
3174By default GDB will automatically keep track of objects as they are
3175loaded and unloaded by the dynamic linker. By using the command `set
3176stop-on-solib-events 1' you can arrange for GDB to stop the inferior
3177when shared library events occur, thus allowing you to set breakpoints
3178in shared libraries which are explicitly loaded by the inferior.
3179
3180Note this feature does not work on hpux8. On hpux9 you must link
3181/usr/lib/end.o into your program. This feature should work
3182automatically on hpux10.
3183
3184* Irix 5.x hardware watchpoint support
3185
3186Irix 5 configurations now support the use of hardware watchpoints.
3187
3188* Mips protocol "SYN garbage limit"
3189
3190When debugging a Mips target using the `target mips' protocol, you
3191may set the number of characters that GDB will ignore by setting
3192the `syn-garbage-limit'. A value of -1 means that GDB will ignore
3193every character. The default value is 1050.
3194
3195* Recording and replaying remote debug sessions
3196
3197If you set `remotelogfile' to the name of a file, gdb will write to it
3198a recording of a remote debug session. This recording may then be
3199replayed back to gdb using "gdbreplay". See gdbserver/README for
3200details. This is useful when you have a problem with GDB while doing
3201remote debugging; you can make a recording of the session and send it
3202to someone else, who can then recreate the problem.
3203
3204* Speedups for remote debugging
3205
3206GDB includes speedups for downloading and stepping MIPS systems using
3207the IDT monitor, fast downloads to the Hitachi SH E7000 emulator,
3208and more efficient S-record downloading.
3209
3210* Memory use reductions and statistics collection
3211
3212GDB now uses less memory and reports statistics about memory usage.
3213Try the `maint print statistics' command, for example.
3214
3215*** Changes in GDB-4.15:
3216
3217* Psymtabs for XCOFF
3218
3219The symbol reader for AIX GDB now uses partial symbol tables. This
3220can greatly improve startup time, especially for large executables.
3221
3222* Remote targets use caching
3223
3224Remote targets now use a data cache to speed up communication with the
3225remote side. The data cache could lead to incorrect results because
3226it doesn't know about volatile variables, thus making it impossible to
3227debug targets which use memory mapped I/O devices. `set remotecache
3228off' turns the the data cache off.
3229
3230* Remote targets may have threads
3231
3232The standard remote protocol now includes support for multiple threads
3233in the target system, using new protocol commands 'H' and 'T'. See
3234gdb/remote.c for details.
3235
3236* NetROM support
3237
3238If GDB is configured with `--enable-netrom', then it will include
3239support for the NetROM ROM emulator from XLNT Designs. The NetROM
3240acts as though it is a bank of ROM on the target board, but you can
3241write into it over the network. GDB's support consists only of
3242support for fast loading into the emulated ROM; to debug, you must use
3243another protocol, such as standard remote protocol. The usual
3244sequence is something like
3245
3246 target nrom <netrom-hostname>
3247 load <prog>
3248 target remote <netrom-hostname>:1235
3249
3250* Macintosh host
3251
3252GDB now includes support for the Apple Macintosh, as a host only. It
3253may be run as either an MPW tool or as a standalone application, and
3254it can debug through the serial port. All the usual GDB commands are
3255available, but to the target command, you must supply "serial" as the
3256device type instead of "/dev/ttyXX". See mpw-README in the main
3257directory for more information on how to build. The MPW configuration
3258scripts */mpw-config.in support only a few targets, and only the
3259mips-idt-ecoff target has been tested.
3260
3261* Autoconf
3262
3263GDB configuration now uses autoconf. This is not user-visible,
3264but does simplify configuration and building.
3265
3266* hpux10
3267
3268GDB now supports hpux10.
3269
3270*** Changes in GDB-4.14:
3271
3272* New native configurations
3273
3274x86 FreeBSD i[345]86-*-freebsd
3275x86 NetBSD i[345]86-*-netbsd
3276NS32k NetBSD ns32k-*-netbsd
3277Sparc NetBSD sparc-*-netbsd
3278
3279* New targets
3280
3281A29K VxWorks a29k-*-vxworks
3282HP PA PRO embedded (WinBond W89K & Oki OP50N) hppa*-*-pro*
3283CPU32 EST-300 emulator m68*-*-est*
3284PowerPC ELF powerpc-*-elf
3285WDC 65816 w65-*-*
3286
3287* Alpha OSF/1 support for procfs
3288
3289GDB now supports procfs under OSF/1-2.x and higher, which makes it
3290possible to attach to running processes. As the mounting of the /proc
3291filesystem is optional on the Alpha, GDB automatically determines
3292the availability of /proc during startup. This can lead to problems
3293if /proc is unmounted after GDB has been started.
3294
3295* Arguments to user-defined commands
3296
3297User commands may accept up to 10 arguments separated by whitespace.
3298Arguments are accessed within the user command via $arg0..$arg9. A
3299trivial example:
3300define adder
3301 print $arg0 + $arg1 + $arg2
3302
3303To execute the command use:
3304adder 1 2 3
3305
3306Defines the command "adder" which prints the sum of its three arguments.
3307Note the arguments are text substitutions, so they may reference variables,
3308use complex expressions, or even perform inferior function calls.
3309
3310* New `if' and `while' commands
3311
3312This makes it possible to write more sophisticated user-defined
3313commands. Both commands take a single argument, which is the
3314expression to evaluate, and must be followed by the commands to
3315execute, one per line, if the expression is nonzero, the list being
3316terminated by the word `end'. The `if' command list may include an
3317`else' word, which causes the following commands to be executed only
3318if the expression is zero.
3319
3320* Fortran source language mode
3321
3322GDB now includes partial support for Fortran 77. It will recognize
3323Fortran programs and can evaluate a subset of Fortran expressions, but
3324variables and functions may not be handled correctly. GDB will work
3325with G77, but does not yet know much about symbols emitted by other
3326Fortran compilers.
3327
3328* Better HPUX support
3329
3330Most debugging facilities now work on dynamic executables for HPPAs
3331running hpux9 or later. You can attach to running dynamically linked
3332processes, but by default the dynamic libraries will be read-only, so
3333for instance you won't be able to put breakpoints in them. To change
3334that behavior do the following before running the program:
3335
3336 adb -w a.out
3337 __dld_flags?W 0x5
3338 control-d
3339
3340This will cause the libraries to be mapped private and read-write.
3341To revert to the normal behavior, do this:
3342
3343 adb -w a.out
3344 __dld_flags?W 0x4
3345 control-d
3346
3347You cannot set breakpoints or examine data in the library until after
3348the library is loaded if the function/data symbols do not have
3349external linkage.
3350
3351GDB can now also read debug symbols produced by the HP C compiler on
3352HPPAs (sorry, no C++, Fortran or 68k support).
3353
3354* Target byte order now dynamically selectable
3355
3356You can choose which byte order to use with a target system, via the
3357commands "set endian big" and "set endian little", and you can see the
3358current setting by using "show endian". You can also give the command
3359"set endian auto", in which case GDB will use the byte order
3360associated with the executable. Currently, only embedded MIPS
3361configurations support dynamic selection of target byte order.
3362
3363* New DOS host serial code
3364
3365This version uses DPMI interrupts to handle buffered I/O, so you
3366no longer need to run asynctsr when debugging boards connected to
3367a PC's serial port.
3368
3369*** Changes in GDB-4.13:
3370
3371* New "complete" command
3372
3373This lists all the possible completions for the rest of the line, if it
3374were to be given as a command itself. This is intended for use by emacs.
3375
3376* Trailing space optional in prompt
3377
3378"set prompt" no longer adds a space for you after the prompt you set. This
3379allows you to set a prompt which ends in a space or one that does not.
3380
3381* Breakpoint hit counts
3382
3383"info break" now displays a count of the number of times the breakpoint
3384has been hit. This is especially useful in conjunction with "ignore"; you
3385can ignore a large number of breakpoint hits, look at the breakpoint info
3386to see how many times the breakpoint was hit, then run again, ignoring one
3387less than that number, and this will get you quickly to the last hit of
3388that breakpoint.
3389
3390* Ability to stop printing at NULL character
3391
3392"set print null-stop" will cause GDB to stop printing the characters of
3393an array when the first NULL is encountered. This is useful when large
3394arrays actually contain only short strings.
3395
3396* Shared library breakpoints
3397
3398In SunOS 4.x, SVR4, and Alpha OSF/1 configurations, you can now set
3399breakpoints in shared libraries before the executable is run.
3400
3401* Hardware watchpoints
3402
3403There is a new hardware breakpoint for the watch command for sparclite
3404targets. See gdb/sparclite/hw_breakpoint.note.
3405
55241689 3406Hardware watchpoints are also now supported under GNU/Linux.
c906108c
SS
3407
3408* Annotations
3409
3410Annotations have been added. These are for use with graphical interfaces,
3411and are still experimental. Currently only gdba.el uses these.
3412
3413* Improved Irix 5 support
3414
3415GDB now works properly with Irix 5.2.
3416
3417* Improved HPPA support
3418
3419GDB now works properly with the latest GCC and GAS.
3420
3421* New native configurations
3422
3423Sequent PTX4 i[34]86-sequent-ptx4
3424HPPA running OSF/1 hppa*-*-osf*
3425Atari TT running SVR4 m68*-*-sysv4*
3426RS/6000 LynxOS rs6000-*-lynxos*
3427
3428* New targets
3429
3430OS/9000 i[34]86-*-os9k
3431MIPS R4000 mips64*{,el}-*-{ecoff,elf}
3432Sparc64 sparc64-*-*
3433
3434* Hitachi SH7000 and E7000-PC ICE support
3435
3436There is now support for communicating with the Hitachi E7000-PC ICE.
3437This is available automatically when GDB is configured for the SH.
3438
3439* Fixes
3440
3441As usual, a variety of small fixes and improvements, both generic
3442and configuration-specific. See the ChangeLog for more detail.
3443
3444*** Changes in GDB-4.12:
3445
3446* Irix 5 is now supported
3447
3448* HPPA support
3449
3450GDB-4.12 on the HPPA has a number of changes which make it unable
3451to debug the output from the currently released versions of GCC and
3452GAS (GCC 2.5.8 and GAS-2.2 or PAGAS-1.36). Until the next major release
3453of GCC and GAS, versions of these tools designed to work with GDB-4.12
3454can be retrieved via anonymous ftp from jaguar.cs.utah.edu:/dist.
3455
3456
3457*** Changes in GDB-4.11:
3458
3459* User visible changes:
3460
3461* Remote Debugging
3462
3463The "set remotedebug" option is now consistent between the mips remote
3464target, remote targets using the gdb-specific protocol, UDI (AMD's
3465debug protocol for the 29k) and the 88k bug monitor. It is now an
3466integer specifying a debug level (normally 0 or 1, but 2 means more
3467debugging info for the mips target).
3468
3469* DEC Alpha native support
3470
3471GDB now works on the DEC Alpha. GCC 2.4.5 does not produce usable
3472debug info, but GDB works fairly well with the DEC compiler and should
3473work with a future GCC release. See the README file for a few
3474Alpha-specific notes.
3475
3476* Preliminary thread implementation
3477
3478GDB now has preliminary thread support for both SGI/Irix and LynxOS.
3479
3480* LynxOS native and target support for 386
3481
3482This release has been hosted on LynxOS 2.2, and also can be configured
3483to remotely debug programs running under LynxOS (see gdb/gdbserver/README
3484for details).
3485
3486* Improvements in C++ mangling/demangling.
3487
3488This release has much better g++ debugging, specifically in name
3489mangling/demangling, virtual function calls, print virtual table,
3490call methods, ...etc.
3491
3492*** Changes in GDB-4.10:
3493
3494 * User visible changes:
3495
3496Remote debugging using the GDB-specific (`target remote') protocol now
3497supports the `load' command. This is only useful if you have some
3498other way of getting the stub to the target system, and you can put it
3499somewhere in memory where it won't get clobbered by the download.
3500
3501Filename completion now works.
3502
3503When run under emacs mode, the "info line" command now causes the
3504arrow to point to the line specified. Also, "info line" prints
3505addresses in symbolic form (as well as hex).
3506
3507All vxworks based targets now support a user settable option, called
3508vxworks-timeout. This option represents the number of seconds gdb
3509should wait for responses to rpc's. You might want to use this if
3510your vxworks target is, perhaps, a slow software simulator or happens
3511to be on the far side of a thin network line.
3512
3513 * DEC alpha support
3514
3515This release contains support for using a DEC alpha as a GDB host for
3516cross debugging. Native alpha debugging is not supported yet.
3517
3518
3519*** Changes in GDB-4.9:
3520
3521 * Testsuite
3522
3523This is the first GDB release which is accompanied by a matching testsuite.
3524The testsuite requires installation of dejagnu, which should be available
3525via ftp from most sites that carry GNU software.
3526
3527 * C++ demangling
3528
3529'Cfront' style demangling has had its name changed to 'ARM' style, to
3530emphasize that it was written from the specifications in the C++ Annotated
3531Reference Manual, not necessarily to be compatible with AT&T cfront. Despite
3532disclaimers, it still generated too much confusion with users attempting to
3533use gdb with AT&T cfront.
3534
3535 * Simulators
3536
3537GDB now uses a standard remote interface to a simulator library.
3538So far, the library contains simulators for the Zilog Z8001/2, the
3539Hitachi H8/300, H8/500 and Super-H.
3540
3541 * New targets supported
3542
3543H8/300 simulator h8300-hitachi-hms or h8300hms
3544H8/500 simulator h8500-hitachi-hms or h8500hms
3545SH simulator sh-hitachi-hms or sh
3546Z8000 simulator z8k-zilog-none or z8ksim
3547IDT MIPS board over serial line mips-idt-ecoff
3548
3549Cross-debugging to GO32 targets is supported. It requires a custom
3550version of the i386-stub.c module which is integrated with the
3551GO32 memory extender.
3552
3553 * New remote protocols
3554
3555MIPS remote debugging protocol.
3556
3557 * New source languages supported
3558
3559This version includes preliminary support for Chill, a Pascal like language
3560used by telecommunications companies. Chill support is also being integrated
3561into the GNU compiler, but we don't know when it will be publically available.
3562
3563
3564*** Changes in GDB-4.8:
3565
3566 * HP Precision Architecture supported
3567
3568GDB now supports HP PA-RISC machines running HPUX. A preliminary
3569version of this support was available as a set of patches from the
3570University of Utah. GDB does not support debugging of programs
3571compiled with the HP compiler, because HP will not document their file
3572format. Instead, you must use GCC (version 2.3.2 or later) and PA-GAS
3573(as available from jaguar.cs.utah.edu:/dist/pa-gas.u4.tar.Z).
3574
3575Many problems in the preliminary version have been fixed.
3576
3577 * Faster and better demangling
3578
3579We have improved template demangling and fixed numerous bugs in the GNU style
3580demangler. It can now handle type modifiers such as `static' or `const'. Wide
3581character types (wchar_t) are now supported. Demangling of each symbol is now
3582only done once, and is cached when the symbol table for a file is read in.
3583This results in a small increase in memory usage for C programs, a moderate
3584increase in memory usage for C++ programs, and a fantastic speedup in
3585symbol lookups.
3586
3587`Cfront' style demangling still doesn't work with AT&T cfront. It was written
3588from the specifications in the Annotated Reference Manual, which AT&T's
3589compiler does not actually implement.
3590
3591 * G++ multiple inheritance compiler problem
3592
3593In the 2.3.2 release of gcc/g++, how the compiler resolves multiple
3594inheritance lattices was reworked to properly discover ambiguities. We
3595recently found an example which causes this new algorithm to fail in a
3596very subtle way, producing bad debug information for those classes.
3597The file 'gcc.patch' (in this directory) can be applied to gcc to
3598circumvent the problem. A future GCC release will contain a complete
3599fix.
3600
3601The previous G++ debug info problem (mentioned below for the gdb-4.7
3602release) is fixed in gcc version 2.3.2.
3603
3604 * Improved configure script
3605
3606The `configure' script will now attempt to guess your system type if
3607you don't supply a host system type. The old scheme of supplying a
3608host system triplet is preferable over using this. All the magic is
3609done in the new `config.guess' script. Examine it for details.
3610
3611We have also brought our configure script much more in line with the FSF's
3612version. It now supports the --with-xxx options. In particular,
3613`--with-minimal-bfd' can be used to make the GDB binary image smaller.
3614The resulting GDB will not be able to read arbitrary object file formats --
3615only the format ``expected'' to be used on the configured target system.
3616We hope to make this the default in a future release.
3617
3618 * Documentation improvements
3619
3620There's new internal documentation on how to modify GDB, and how to
3621produce clean changes to the code. We implore people to read it
3622before submitting changes.
3623
3624The GDB manual uses new, sexy Texinfo conditionals, rather than arcane
3625M4 macros. The new texinfo.tex is provided in this release. Pre-built
3626`info' files are also provided. To build `info' files from scratch,
3627you will need the latest `makeinfo' release, which will be available in
3628a future texinfo-X.Y release.
3629
3630*NOTE* The new texinfo.tex can cause old versions of TeX to hang.
3631We're not sure exactly which versions have this problem, but it has
3632been seen in 3.0. We highly recommend upgrading to TeX version 3.141
3633or better. If that isn't possible, there is a patch in
3634`texinfo/tex3patch' that will modify `texinfo/texinfo.tex' to work
3635around this problem.
3636
3637 * New features
3638
3639GDB now supports array constants that can be used in expressions typed in by
3640the user. The syntax is `{element, element, ...}'. Ie: you can now type
3641`print {1, 2, 3}', and it will build up an array in memory malloc'd in
3642the target program.
3643
3644The new directory `gdb/sparclite' contains a program that demonstrates
3645how the sparc-stub.c remote stub runs on a Fujitsu SPARClite processor.
3646
3647 * New native hosts supported
3648
3649HP/PA-RISC under HPUX using GNU tools hppa1.1-hp-hpux
3650386 CPUs running SCO Unix 3.2v4 i386-unknown-sco3.2v4
3651
3652 * New targets supported
3653
3654AMD 29k family via UDI a29k-amd-udi or udi29k
3655
3656 * New file formats supported
3657
3658BFD now supports reading HP/PA-RISC executables (SOM file format?),
3659HPUX core files, and SCO 3.2v2 core files.
3660
3661 * Major bug fixes
3662
3663Attaching to processes now works again; thanks for the many bug reports.
3664
3665We have also stomped on a bunch of core dumps caused by
3666printf_filtered("%s") problems.
3667
3668We eliminated a copyright problem on the rpc and ptrace header files
3669for VxWorks, which was discovered at the last minute during the 4.7
3670release. You should now be able to build a VxWorks GDB.
3671
3672You can now interrupt gdb while an attached process is running. This
3673will cause the attached process to stop, and give control back to GDB.
3674
3675We fixed problems caused by using too many file descriptors
3676for reading symbols from object files and libraries. This was
3677especially a problem for programs that used many (~100) shared
3678libraries.
3679
3680The `step' command now only enters a subroutine if there is line number
3681information for the subroutine. Otherwise it acts like the `next'
3682command. Previously, `step' would enter subroutines if there was
3683any debugging information about the routine. This avoids problems
3684when using `cc -g1' on MIPS machines.
3685
3686 * Internal improvements
3687
3688GDB's internal interfaces have been improved to make it easier to support
3689debugging of multiple languages in the future.
3690
3691GDB now uses a common structure for symbol information internally.
3692Minimal symbols (derived from linkage symbols in object files), partial
3693symbols (from a quick scan of debug information), and full symbols
3694contain a common subset of information, making it easier to write
3695shared code that handles any of them.
3696
3697 * New command line options
3698
3699We now accept --silent as an alias for --quiet.
3700
3701 * Mmalloc licensing
3702
3703The memory-mapped-malloc library is now licensed under the GNU Library
3704General Public License.
3705
3706*** Changes in GDB-4.7:
3707
3708 * Host/native/target split
3709
3710GDB has had some major internal surgery to untangle the support for
3711hosts and remote targets. Now, when you configure GDB for a remote
3712target, it will no longer load in all of the support for debugging
3713local programs on the host. When fully completed and tested, this will
3714ensure that arbitrary host/target combinations are possible.
3715
3716The primary conceptual shift is to separate the non-portable code in
3717GDB into three categories. Host specific code is required any time GDB
3718is compiled on that host, regardless of the target. Target specific
3719code relates to the peculiarities of the target, but can be compiled on
3720any host. Native specific code is everything else: it can only be
3721built when the host and target are the same system. Child process
3722handling and core file support are two common `native' examples.
3723
3724GDB's use of /proc for controlling Unix child processes is now cleaner.
3725It has been split out into a single module under the `target_ops' vector,
3726plus two native-dependent functions for each system that uses /proc.
3727
3728 * New hosts supported
3729
3730HP/Apollo 68k (under the BSD domain) m68k-apollo-bsd or apollo68bsd
3731386 CPUs running various BSD ports i386-unknown-bsd or 386bsd
3732386 CPUs running SCO Unix i386-unknown-scosysv322 or i386sco
3733
3734 * New targets supported
3735
3736Fujitsu SPARClite sparclite-fujitsu-none or sparclite
373768030 and CPU32 m68030-*-*, m68332-*-*
3738
3739 * New native hosts supported
3740
3741386 CPUs running various BSD ports i386-unknown-bsd or 386bsd
3742 (386bsd is not well tested yet)
3743386 CPUs running SCO Unix i386-unknown-scosysv322 or sco
3744
3745 * New file formats supported
3746
3747BFD now supports COFF files for the Zilog Z8000 microprocessor. It
3748supports reading of `a.out.adobe' object files, which are an a.out
3749format extended with minimal information about multiple sections.
3750
3751 * New commands
3752
3753`show copying' is the same as the old `info copying'.
3754`show warranty' is the same as `info warrantee'.
3755These were renamed for consistency. The old commands continue to work.
3756
3757`info handle' is a new alias for `info signals'.
3758
3759You can now define pre-command hooks, which attach arbitrary command
3760scripts to any command. The commands in the hook will be executed
3761prior to the user's command. You can also create a hook which will be
3762executed whenever the program stops. See gdb.texinfo.
3763
3764 * C++ improvements
3765
3766We now deal with Cfront style name mangling, and can even extract type
3767info from mangled symbols. GDB can automatically figure out which
3768symbol mangling style your C++ compiler uses.
3769
3770Calling of methods and virtual functions has been improved as well.
3771
3772 * Major bug fixes
3773
3774The crash that occured when debugging Sun Ansi-C compiled binaries is
3775fixed. This was due to mishandling of the extra N_SO stabs output
3776by the compiler.
3777
3778We also finally got Ultrix 4.2 running in house, and fixed core file
3779support, with help from a dozen people on the net.
3780
3781John M. Farrell discovered that the reason that single-stepping was so
3782slow on all of the Mips based platforms (primarily SGI and DEC) was
3783that we were trying to demangle and lookup a symbol used for internal
3784purposes on every instruction that was being stepped through. Changing
3785the name of that symbol so that it couldn't be mistaken for a C++
3786mangled symbol sped things up a great deal.
3787
3788Rich Pixley sped up symbol lookups in general by getting much smarter
3789about when C++ symbol mangling is necessary. This should make symbol
3790completion (TAB on the command line) much faster. It's not as fast as
3791we'd like, but it's significantly faster than gdb-4.6.
3792
3793 * AMD 29k support
3794
3795A new user controllable variable 'call_scratch_address' can
3796specify the location of a scratch area to be used when GDB
3797calls a function in the target. This is necessary because the
3798usual method of putting the scratch area on the stack does not work
3799in systems that have separate instruction and data spaces.
3800
3801We integrated changes to support the 29k UDI (Universal Debugger
3802Interface), but discovered at the last minute that we didn't have all
3803of the appropriate copyright paperwork. We are working with AMD to
3804resolve this, and hope to have it available soon.
3805
3806 * Remote interfaces
3807
3808We have sped up the remote serial line protocol, especially for targets
3809with lots of registers. It now supports a new `expedited status' ('T')
3810message which can be used in place of the existing 'S' status message.
3811This allows the remote stub to send only the registers that GDB
3812needs to make a quick decision about single-stepping or conditional
3813breakpoints, eliminating the need to fetch the entire register set for
3814each instruction being stepped through.
3815
3816The GDB remote serial protocol now implements a write-through cache for
3817registers, only re-reading the registers if the target has run.
3818
3819There is also a new remote serial stub for SPARC processors. You can
3820find it in gdb-4.7/gdb/sparc-stub.c. This was written to support the
3821Fujitsu SPARClite processor, but will run on any stand-alone SPARC
3822processor with a serial port.
3823
3824 * Configuration
3825
3826Configure.in files have become much easier to read and modify. A new
3827`table driven' format makes it more obvious what configurations are
3828supported, and what files each one uses.
3829
3830 * Library changes
3831
3832There is a new opcodes library which will eventually contain all of the
3833disassembly routines and opcode tables. At present, it only contains
3834Sparc and Z8000 routines. This will allow the assembler, debugger, and
3835disassembler (binutils/objdump) to share these routines.
3836
3837The libiberty library is now copylefted under the GNU Library General
3838Public License. This allows more liberal use, and was done so libg++
3839can use it. This makes no difference to GDB, since the Library License
3840grants all the rights from the General Public License.
3841
3842 * Documentation
3843
3844The file gdb-4.7/gdb/doc/stabs.texinfo is a (relatively) complete
3845reference to the stabs symbol info used by the debugger. It is (as far
3846as we know) the only published document on this fascinating topic. We
3847encourage you to read it, compare it to the stabs information on your
3848system, and send improvements on the document in general (to
3849bug-gdb@prep.ai.mit.edu).
3850
3851And, of course, many bugs have been fixed.
3852
3853
3854*** Changes in GDB-4.6:
3855
3856 * Better support for C++ function names
3857
3858GDB now accepts as input the "demangled form" of C++ overloaded function
3859names and member function names, and can do command completion on such names
3860(using TAB, TAB-TAB, and ESC-?). The names have to be quoted with a pair of
3861single quotes. Examples are 'func (int, long)' and 'obj::operator==(obj&)'.
3862Make use of command completion, it is your friend.
3863
3864GDB also now accepts a variety of C++ mangled symbol formats. They are
3865the GNU g++ style, the Cfront (ARM) style, and the Lucid (lcc) style.
3866You can tell GDB which format to use by doing a 'set demangle-style {gnu,
3867lucid, cfront, auto}'. 'gnu' is the default. Do a 'set demangle-style foo'
3868for the list of formats.
3869
3870 * G++ symbol mangling problem
3871
3872Recent versions of gcc have a bug in how they emit debugging information for
3873C++ methods (when using dbx-style stabs). The file 'gcc.patch' (in this
3874directory) can be applied to gcc to fix the problem. Alternatively, if you
3875can't fix gcc, you can #define GCC_MANGLE_BUG when compling gdb/symtab.c. The
3876usual symptom is difficulty with setting breakpoints on methods. GDB complains
3877about the method being non-existent. (We believe that version 2.2.2 of GCC has
3878this problem.)
3879
3880 * New 'maintenance' command
3881
3882All of the commands related to hacking GDB internals have been moved out of
3883the main command set, and now live behind the 'maintenance' command. This
3884can also be abbreviated as 'mt'. The following changes were made:
3885
3886 dump-me -> maintenance dump-me
3887 info all-breakpoints -> maintenance info breakpoints
3888 printmsyms -> maintenance print msyms
3889 printobjfiles -> maintenance print objfiles
3890 printpsyms -> maintenance print psymbols
3891 printsyms -> maintenance print symbols
3892
3893The following commands are new:
3894
3895 maintenance demangle Call internal GDB demangler routine to
3896 demangle a C++ link name and prints the result.
3897 maintenance print type Print a type chain for a given symbol
3898
3899 * Change to .gdbinit file processing
3900
3901We now read the $HOME/.gdbinit file before processing the argv arguments
3902(e.g. reading symbol files or core files). This allows global parameters to
3903be set, which will apply during the symbol reading. The ./.gdbinit is still
3904read after argv processing.
3905
3906 * New hosts supported
3907
3908Solaris-2.0 !!! sparc-sun-solaris2 or sun4sol2
3909
55241689 3910GNU/Linux support i386-unknown-linux or linux
c906108c
SS
3911
3912We are also including code to support the HP/PA running BSD and HPUX. This
3913is almost guaranteed not to work, as we didn't have time to test or build it
3914for this release. We are including it so that the more adventurous (or
3915masochistic) of you can play with it. We also had major problems with the
3916fact that the compiler that we got from HP doesn't support the -g option.
3917It costs extra.
3918
3919 * New targets supported
3920
3921Hitachi H8/300 h8300-hitachi-hms or h8300hms
3922
3923 * More smarts about finding #include files
3924
3925GDB now remembers the compilation directory for all include files, and for
3926all files from which C is generated (like yacc and lex sources). This
3927greatly improves GDB's ability to find yacc/lex sources, and include files,
3928especially if you are debugging your program from a directory different from
3929the one that contains your sources.
3930
3931We also fixed a bug which caused difficulty with listing and setting
3932breakpoints in include files which contain C code. (In the past, you had to
3933try twice in order to list an include file that you hadn't looked at before.)
3934
3935 * Interesting infernals change
3936
3937GDB now deals with arbitrary numbers of sections, where the symbols for each
3938section must be relocated relative to that section's landing place in the
3939target's address space. This work was needed to support ELF with embedded
3940stabs used by Solaris-2.0.
3941
3942 * Bug fixes (of course!)
3943
3944There have been loads of fixes for the following things:
3945 mips, rs6000, 29k/udi, m68k, g++, type handling, elf/dwarf, m88k,
3946 i960, stabs, DOS(GO32), procfs, etc...
3947
3948See the ChangeLog for details.
3949
3950*** Changes in GDB-4.5:
3951
3952 * New machines supported (host and target)
3953
3954IBM RS6000 running AIX rs6000-ibm-aix or rs6000
3955
3956SGI Irix-4.x mips-sgi-irix4 or iris4
3957
3958 * New malloc package
3959
3960GDB now uses a new memory manager called mmalloc, based on gmalloc.
3961Mmalloc is capable of handling mutiple heaps of memory. It is also
3962capable of saving a heap to a file, and then mapping it back in later.
3963This can be used to greatly speedup the startup of GDB by using a
3964pre-parsed symbol table which lives in a mmalloc managed heap. For
3965more details, please read mmalloc/mmalloc.texi.
3966
3967 * info proc
3968
3969The 'info proc' command (SVR4 only) has been enhanced quite a bit. See
3970'help info proc' for details.
3971
3972 * MIPS ecoff symbol table format
3973
3974The code that reads MIPS symbol table format is now supported on all hosts.
3975Thanks to MIPS for releasing the sym.h and symconst.h files to make this
3976possible.
3977
3978 * File name changes for MS-DOS
3979
3980Many files in the config directories have been renamed to make it easier to
3981support GDB on MS-DOSe systems (which have very restrictive file name
3982conventions :-( ). MS-DOSe host support (under DJ Delorie's GO32
3983environment) is close to working but has some remaining problems. Note
3984that debugging of DOS programs is not supported, due to limitations
3985in the ``operating system'', but it can be used to host cross-debugging.
3986
3987 * Cross byte order fixes
3988
3989Many fixes have been made to support cross debugging of Sparc and MIPS
3990targets from hosts whose byte order differs.
3991
3992 * New -mapped and -readnow options
3993
3994If memory-mapped files are available on your system through the 'mmap'
3995system call, you can use the -mapped option on the `file' or
3996`symbol-file' commands to cause GDB to write the symbols from your
3997program into a reusable file. If the program you are debugging is
3998called `/path/fred', the mapped symbol file will be `./fred.syms'.
3999Future GDB debugging sessions will notice the presence of this file,
4000and will quickly map in symbol information from it, rather than reading
4001the symbol table from the executable program. Using the '-mapped'
4002option in a GDB `file' or `symbol-file' command has the same effect as
4003starting GDB with the '-mapped' command-line option.
4004
4005You can cause GDB to read the entire symbol table immediately by using
4006the '-readnow' option with any of the commands that load symbol table
4007information (or on the GDB command line). This makes the command
4008slower, but makes future operations faster.
4009
4010The -mapped and -readnow options are typically combined in order to
4011build a `fred.syms' file that contains complete symbol information.
4012A simple GDB invocation to do nothing but build a `.syms' file for future
4013use is:
4014
4015 gdb -batch -nx -mapped -readnow programname
4016
4017The `.syms' file is specific to the host machine on which GDB is run.
4018It holds an exact image of GDB's internal symbol table. It cannot be
4019shared across multiple host platforms.
4020
4021 * longjmp() handling
4022
4023GDB is now capable of stepping and nexting over longjmp(), _longjmp(), and
4024siglongjmp() without losing control. This feature has not yet been ported to
4025all systems. It currently works on many 386 platforms, all MIPS-based
4026platforms (SGI, DECstation, etc), and Sun3/4.
4027
4028 * Solaris 2.0
4029
4030Preliminary work has been put in to support the new Solaris OS from Sun. At
4031this time, it can control and debug processes, but it is not capable of
4032reading symbols.
4033
4034 * Bug fixes
4035
4036As always, many many bug fixes. The major areas were with g++, and mipsread.
4037People using the MIPS-based platforms should experience fewer mysterious
4038crashes and trashed symbol tables.
4039
4040*** Changes in GDB-4.4:
4041
4042 * New machines supported (host and target)
4043
4044SCO Unix on i386 IBM PC clones i386-sco-sysv or i386sco
4045 (except core files)
4046BSD Reno on Vax vax-dec-bsd
4047Ultrix on Vax vax-dec-ultrix
4048
4049 * New machines supported (target)
4050
4051AMD 29000 embedded, using EBMON a29k-none-none
4052
4053 * C++ support
4054
4055GDB continues to improve its handling of C++. `References' work better.
4056The demangler has also been improved, and now deals with symbols mangled as
4057per the Annotated C++ Reference Guide.
4058
4059GDB also now handles `stabs' symbol information embedded in MIPS
4060`ecoff' symbol tables. Since the ecoff format was not easily
4061extensible to handle new languages such as C++, this appeared to be a
4062good way to put C++ debugging info into MIPS binaries. This option
4063will be supported in the GNU C compiler, version 2, when it is
4064released.
4065
4066 * New features for SVR4
4067
4068GDB now handles SVR4 shared libraries, in the same fashion as SunOS
4069shared libraries. Debugging dynamically linked programs should present
4070only minor differences from debugging statically linked programs.
4071
4072The `info proc' command will print out information about any process
4073on an SVR4 system (including the one you are debugging). At the moment,
4074it prints the address mappings of the process.
4075
4076If you bring up GDB on another SVR4 system, please send mail to
4077bug-gdb@prep.ai.mit.edu to let us know what changes were reqired (if any).
4078
4079 * Better dynamic linking support in SunOS
4080
4081Reading symbols from shared libraries which contain debugging symbols
4082now works properly. However, there remain issues such as automatic
4083skipping of `transfer vector' code during function calls, which
4084make it harder to debug code in a shared library, than to debug the
4085same code linked statically.
4086
4087 * New Getopt
4088
4089GDB is now using the latest `getopt' routines from the FSF. This
4090version accepts the -- prefix for options with long names. GDB will
4091continue to accept the old forms (-option and +option) as well.
4092Various single letter abbreviations for options have been explicity
4093added to the option table so that they won't get overshadowed in the
4094future by other options that begin with the same letter.
4095
4096 * Bugs fixed
4097
4098The `cleanup_undefined_types' bug that many of you noticed has been squashed.
4099Many assorted bugs have been handled. Many more remain to be handled.
4100See the various ChangeLog files (primarily in gdb and bfd) for details.
4101
4102
4103*** Changes in GDB-4.3:
4104
4105 * New machines supported (host and target)
4106
4107Amiga 3000 running Amix m68k-cbm-svr4 or amix
4108NCR 3000 386 running SVR4 i386-ncr-svr4 or ncr3000
4109Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88
4110
4111 * Almost SCO Unix support
4112
4113We had hoped to support:
4114SCO Unix on i386 IBM PC clones i386-sco-sysv or i386sco
4115(except for core file support), but we discovered very late in the release
4116that it has problems with process groups that render gdb unusable. Sorry
4117about that. I encourage people to fix it and post the fixes.
4118
4119 * Preliminary ELF and DWARF support
4120
4121GDB can read ELF object files on System V Release 4, and can handle
4122debugging records for C, in DWARF format, in ELF files. This support
4123is preliminary. If you bring up GDB on another SVR4 system, please
4124send mail to bug-gdb@prep.ai.mit.edu to let us know what changes were
4125reqired (if any).
4126
4127 * New Readline
4128
4129GDB now uses the latest `readline' library. One user-visible change
4130is that two tabs will list possible command completions, which previously
4131required typing M-? (meta-question mark, or ESC ?).
4132
4133 * Bugs fixed
4134
4135The `stepi' bug that many of you noticed has been squashed.
4136Many bugs in C++ have been handled. Many more remain to be handled.
4137See the various ChangeLog files (primarily in gdb and bfd) for details.
4138
4139 * State of the MIPS world (in case you wondered):
4140
4141GDB can understand the symbol tables emitted by the compilers
4142supplied by most vendors of MIPS-based machines, including DEC. These
4143symbol tables are in a format that essentially nobody else uses.
4144
4145Some versions of gcc come with an assembler post-processor called
4146mips-tfile. This program is required if you want to do source-level
4147debugging of gcc-compiled programs. I believe FSF does not ship
4148mips-tfile with gcc version 1, but it will eventually come with gcc
4149version 2.
4150
4151Debugging of g++ output remains a problem. g++ version 1.xx does not
4152really support it at all. (If you're lucky, you should be able to get
4153line numbers and stack traces to work, but no parameters or local
4154variables.) With some work it should be possible to improve the
4155situation somewhat.
4156
4157When gcc version 2 is released, you will have somewhat better luck.
4158However, even then you will get confusing results for inheritance and
4159methods.
4160
4161We will eventually provide full debugging of g++ output on
4162DECstations. This will probably involve some kind of stabs-in-ecoff
4163encapulation, but the details have not been worked out yet.
4164
4165
4166*** Changes in GDB-4.2:
4167
4168 * Improved configuration
4169
4170Only one copy of `configure' exists now, and it is not self-modifying.
4171Porting BFD is simpler.
4172
4173 * Stepping improved
4174
4175The `step' and `next' commands now only stop at the first instruction
4176of a source line. This prevents the multiple stops that used to occur
4177in switch statements, for-loops, etc. `Step' continues to stop if a
4178function that has debugging information is called within the line.
4179
4180 * Bug fixing
4181
4182Lots of small bugs fixed. More remain.
4183
4184 * New host supported (not target)
4185
4186Intel 386 PC clone running Mach i386-none-mach
4187
4188
4189*** Changes in GDB-4.1:
4190
4191 * Multiple source language support
4192
4193GDB now has internal scaffolding to handle several source languages.
4194It determines the type of each source file from its filename extension,
4195and will switch expression parsing and number formatting to match the
4196language of the function in the currently selected stack frame.
4197You can also specifically set the language to be used, with
4198`set language c' or `set language modula-2'.
4199
4200 * GDB and Modula-2
4201
4202GDB now has preliminary support for the GNU Modula-2 compiler,
4203currently under development at the State University of New York at
4204Buffalo. Development of both GDB and the GNU Modula-2 compiler will
4205continue through the fall of 1991 and into 1992.
4206
4207Other Modula-2 compilers are currently not supported, and attempting to
4208debug programs compiled with them will likely result in an error as the
4209symbol table is read. Feel free to work on it, though!
4210
4211There are hooks in GDB for strict type checking and range checking,
4212in the `Modula-2 philosophy', but they do not currently work.
4213
4214 * set write on/off
4215
4216GDB can now write to executable and core files (e.g. patch
4217a variable's value). You must turn this switch on, specify
4218the file ("exec foo" or "core foo"), *then* modify it, e.g.
4219by assigning a new value to a variable. Modifications take
4220effect immediately.
4221
4222 * Automatic SunOS shared library reading
4223
4224When you run your program, GDB automatically determines where its
4225shared libraries (if any) have been loaded, and reads their symbols.
4226The `share' command is no longer needed. This also works when
4227examining core files.
4228
4229 * set listsize
4230
4231You can specify the number of lines that the `list' command shows.
4232The default is 10.
4233
4234 * New machines supported (host and target)
4235
4236SGI Iris (MIPS) running Irix V3: mips-sgi-irix or iris
4237Sony NEWS (68K) running NEWSOS 3.x: m68k-sony-sysv or news
4238Ultracomputer (29K) running Sym1: a29k-nyu-sym1 or ultra3
4239
4240 * New hosts supported (not targets)
4241
4242IBM RT/PC: romp-ibm-aix or rtpc
4243
4244 * New targets supported (not hosts)
4245
4246AMD 29000 embedded with COFF a29k-none-coff
4247AMD 29000 embedded with a.out a29k-none-aout
4248Ultracomputer remote kernel debug a29k-nyu-kern
4249
4250 * New remote interfaces
4251
4252AMD 29000 Adapt
4253AMD 29000 Minimon
4254
4255
4256*** Changes in GDB-4.0:
4257
4258 * New Facilities
4259
4260Wide output is wrapped at good places to make the output more readable.
4261
4262Gdb now supports cross-debugging from a host machine of one type to a
4263target machine of another type. Communication with the target system
4264is over serial lines. The ``target'' command handles connecting to the
4265remote system; the ``load'' command will download a program into the
4266remote system. Serial stubs for the m68k and i386 are provided. Gdb
4267also supports debugging of realtime processes running under VxWorks,
4268using SunRPC Remote Procedure Calls over TCP/IP to talk to a debugger
4269stub on the target system.
4270
4271New CPUs supported include the AMD 29000 and Intel 960.
4272
4273GDB now reads object files and symbol tables via a ``binary file''
4274library, which allows a single copy of GDB to debug programs of multiple
4275object file types such as a.out and coff.
4276
4277There is now a GDB reference card in "doc/refcard.tex". (Make targets
4278refcard.dvi and refcard.ps are available to format it).
4279
4280
4281 * Control-Variable user interface simplified
4282
4283All variables that control the operation of the debugger can be set
4284by the ``set'' command, and displayed by the ``show'' command.
4285
4286For example, ``set prompt new-gdb=>'' will change your prompt to new-gdb=>.
4287``Show prompt'' produces the response:
4288Gdb's prompt is new-gdb=>.
4289
4290What follows are the NEW set commands. The command ``help set'' will
4291print a complete list of old and new set commands. ``help set FOO''
4292will give a longer description of the variable FOO. ``show'' will show
4293all of the variable descriptions and their current settings.
4294
4295confirm on/off: Enables warning questions for operations that are
4296 hard to recover from, e.g. rerunning the program while
4297 it is already running. Default is ON.
4298
4299editing on/off: Enables EMACS style command line editing
4300 of input. Previous lines can be recalled with
4301 control-P, the current line can be edited with control-B,
4302 you can search for commands with control-R, etc.
4303 Default is ON.
4304
4305history filename NAME: NAME is where the gdb command history
4306 will be stored. The default is .gdb_history,
4307 or the value of the environment variable
4308 GDBHISTFILE.
4309
4310history size N: The size, in commands, of the command history. The
4311 default is 256, or the value of the environment variable
4312 HISTSIZE.
4313
4314history save on/off: If this value is set to ON, the history file will
4315 be saved after exiting gdb. If set to OFF, the
4316 file will not be saved. The default is OFF.
4317
4318history expansion on/off: If this value is set to ON, then csh-like
4319 history expansion will be performed on
4320 command line input. The default is OFF.
4321
4322radix N: Sets the default radix for input and output. It can be set
4323 to 8, 10, or 16. Note that the argument to "radix" is interpreted
4324 in the current radix, so "set radix 10" is always a no-op.
4325
4326height N: This integer value is the number of lines on a page. Default
4327 is 24, the current `stty rows'' setting, or the ``li#''
4328 setting from the termcap entry matching the environment
4329 variable TERM.
4330
4331width N: This integer value is the number of characters on a line.
4332 Default is 80, the current `stty cols'' setting, or the ``co#''
4333 setting from the termcap entry matching the environment
4334 variable TERM.
4335
4336Note: ``set screensize'' is obsolete. Use ``set height'' and
4337``set width'' instead.
4338
4339print address on/off: Print memory addresses in various command displays,
4340 such as stack traces and structure values. Gdb looks
4341 more ``symbolic'' if you turn this off; it looks more
4342 ``machine level'' with it on. Default is ON.
4343
4344print array on/off: Prettyprint arrays. New convenient format! Default
4345 is OFF.
4346
4347print demangle on/off: Print C++ symbols in "source" form if on,
4348 "raw" form if off.
4349
4350print asm-demangle on/off: Same, for assembler level printouts
4351 like instructions.
4352
4353print vtbl on/off: Prettyprint C++ virtual function tables. Default is OFF.
4354
4355
4356 * Support for Epoch Environment.
4357
4358The epoch environment is a version of Emacs v18 with windowing. One
4359new command, ``inspect'', is identical to ``print'', except that if you
4360are running in the epoch environment, the value is printed in its own
4361window.
4362
4363
4364 * Support for Shared Libraries
4365
4366GDB can now debug programs and core files that use SunOS shared libraries.
4367Symbols from a shared library cannot be referenced
4368before the shared library has been linked with the program (this
4369happens after you type ``run'' and before the function main() is entered).
4370At any time after this linking (including when examining core files
4371from dynamically linked programs), gdb reads the symbols from each
4372shared library when you type the ``sharedlibrary'' command.
4373It can be abbreviated ``share''.
4374
4375sharedlibrary REGEXP: Load shared object library symbols for files
4376 matching a unix regular expression. No argument
4377 indicates to load symbols for all shared libraries.
4378
4379info sharedlibrary: Status of loaded shared libraries.
4380
4381
4382 * Watchpoints
4383
4384A watchpoint stops execution of a program whenever the value of an
4385expression changes. Checking for this slows down execution
4386tremendously whenever you are in the scope of the expression, but is
4387quite useful for catching tough ``bit-spreader'' or pointer misuse
4388problems. Some machines such as the 386 have hardware for doing this
4389more quickly, and future versions of gdb will use this hardware.
4390
4391watch EXP: Set a watchpoint (breakpoint) for an expression.
4392
4393info watchpoints: Information about your watchpoints.
4394
4395delete N: Deletes watchpoint number N (same as breakpoints).
4396disable N: Temporarily turns off watchpoint number N (same as breakpoints).
4397enable N: Re-enables watchpoint number N (same as breakpoints).
4398
4399
4400 * C++ multiple inheritance
4401
4402When used with a GCC version 2 compiler, GDB supports multiple inheritance
4403for C++ programs.
4404
4405 * C++ exception handling
4406
4407Gdb now supports limited C++ exception handling. Besides the existing
4408ability to breakpoint on an exception handler, gdb can breakpoint on
4409the raising of an exception (before the stack is peeled back to the
4410handler's context).
4411
4412catch FOO: If there is a FOO exception handler in the dynamic scope,
4413 set a breakpoint to catch exceptions which may be raised there.
4414 Multiple exceptions (``catch foo bar baz'') may be caught.
4415
4416info catch: Lists all exceptions which may be caught in the
4417 current stack frame.
4418
4419
4420 * Minor command changes
4421
4422The command ``call func (arg, arg, ...)'' now acts like the print
4423command, except it does not print or save a value if the function's result
4424is void. This is similar to dbx usage.
4425
4426The ``up'' and ``down'' commands now always print the frame they end up
4427at; ``up-silently'' and `down-silently'' can be used in scripts to change
4428frames without printing.
4429
4430 * New directory command
4431
4432'dir' now adds directories to the FRONT of the source search path.
4433The path starts off empty. Source files that contain debug information
4434about the directory in which they were compiled can be found even
4435with an empty path; Sun CC and GCC include this information. If GDB can't
4436find your source file in the current directory, type "dir .".
4437
4438 * Configuring GDB for compilation
4439
4440For normal use, type ``./configure host''. See README or gdb.texinfo
4441for more details.
4442
4443GDB now handles cross debugging. If you are remotely debugging between
4444two different machines, type ``./configure host -target=targ''.
4445Host is the machine where GDB will run; targ is the machine
4446where the program that you are debugging will run.
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