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| -rw-r--r-- | gdb/NEWS | 2041 |
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diff --git a/gdb/NEWS b/gdb/NEWS deleted file mode 100644 index 5a7e6c38c77..00000000000 --- a/gdb/NEWS +++ /dev/null @@ -1,2041 +0,0 @@ - What has changed in GDB? - (Organized release by release) - -*** Changes since GDB 5.1: - -* New command "set trust-readonly-sections on[off]". - -This command is a hint that tells gdb that read-only sections -really are read-only (ie. that their contents will not change). -In this mode, gdb will go to the object file rather than the -target to read memory from read-only sections (such as ".text"). -This can be a significant performance improvement on some -(notably embedded) targets. - -* New command "generate-core-file" (or "gcore"). - -This new gdb command allows the user to drop a core file of the -child process state at any time. So far it's been implemented -only for Linux and Solaris, but should be relatively easily -ported to other hosts. Argument is core file name (defaults -to core.<pid>). - -* New command line option - -GDB now accepts --pid or -p followed by a process id. - -* Change in command line behavior -- corefiles vs. process ids. - -There is a subtle behavior in the way in which GDB handles -command line arguments. The first non-flag argument is always -a program to debug, but the second non-flag argument may either -be a corefile or a process id. Previously, GDB would attempt to -open the second argument as a corefile, and if that failed, would -issue a superfluous error message and then attempt to attach it as -a process. Now, if the second argument begins with a non-digit, -it will be treated as a corefile. If it begins with a digit, -GDB will attempt to attach it as a process, and if no such process -is found, will then attempt to open it as a corefile. - -* New native configurations - -x86 OpenBSD i[3456]86-*-openbsd* -AMD x86-64 running Linux x86_64-*-linux-* - -* New targets - -Sanyo XStormy16 xstormy16-elf - -* OBSOLETE configurations and files - -Configurations that have been declared obsolete in this release have -been commented out. Unless there is activity to revive these -configurations, the next release of GDB will have their sources -permanently REMOVED. - -AMD 29k family via UDI a29k-amd-udi, udi29k -A29K VxWorks a29k-*-vxworks -AMD 29000 embedded, using EBMON a29k-none-none -AMD 29000 embedded with COFF a29k-none-coff -AMD 29000 embedded with a.out a29k-none-aout - -testsuite/gdb.hp/gdb.threads-hp/ directory - -* REMOVED configurations and files - -TI TMS320C80 tic80-*-* -WDC 65816 w65-*-* -PowerPC Solaris powerpcle-*-solaris* -PowerPC Windows NT powerpcle-*-cygwin32 -PowerPC Netware powerpc-*-netware* -Harris/CXUX m88k m88*-harris-cxux* -Most ns32k hosts and targets ns32k-*-mach3* ns32k-umax-* - ns32k-utek-sysv* ns32k-utek-* -SunOS 4.0.Xi on i386 i[3456]86-*-sunos* -Ultracomputer (29K) running Sym1 a29k-nyu-sym1 a29k-*-kern* -Sony NEWS (68K) running NEWSOS 3.x m68*-sony-sysv news -ISI Optimum V (3.05) under 4.3bsd. m68*-isi-* -Apple Macintosh (MPW) host and target N/A host, powerpc-*-macos* - -* Changes to command line processing - -The new `--args' feature can be used to specify command-line arguments -for the inferior from gdb's command line. - -* Changes to key bindings - -There is a new `operate-and-get-next' function bound to `C-o'. - -*** Changes in GDB 5.1.1 - -Fix compile problem on DJGPP. - -Fix a problem with floating-point registers on the i386 being -corrupted. - -Fix to stop GDB crashing on .debug_str debug info. - -Numerous documentation fixes. - -Numerous testsuite fixes. - -*** Changes in GDB 5.1: - -* New native configurations - -Alpha FreeBSD alpha*-*-freebsd* -x86 FreeBSD 3.x and 4.x i[3456]86*-freebsd[34]* -MIPS Linux mips*-*-linux* -MIPS SGI Irix 6.x mips*-sgi-irix6* -ia64 AIX ia64-*-aix* -s390 and s390x Linux {s390,s390x}-*-linux* - -* New targets - -Motorola 68HC11 and 68HC12 m68hc11-elf -CRIS cris-axis -UltraSparc running Linux sparc64-*-linux* - -* OBSOLETE configurations and files - -x86 FreeBSD before 2.2 i[3456]86*-freebsd{1,2.[01]}*, -Harris/CXUX m88k m88*-harris-cxux* -Most ns32k hosts and targets ns32k-*-mach3* ns32k-umax-* - ns32k-utek-sysv* ns32k-utek-* -TI TMS320C80 tic80-*-* -WDC 65816 w65-*-* -Ultracomputer (29K) running Sym1 a29k-nyu-sym1 a29k-*-kern* -PowerPC Solaris powerpcle-*-solaris* -PowerPC Windows NT powerpcle-*-cygwin32 -PowerPC Netware powerpc-*-netware* -SunOS 4.0.Xi on i386 i[3456]86-*-sunos* -Sony NEWS (68K) running NEWSOS 3.x m68*-sony-sysv news -ISI Optimum V (3.05) under 4.3bsd. m68*-isi-* -Apple Macintosh (MPW) host N/A - -stuff.c (Program to stuff files into a specially prepared space in kdb) -kdb-start.c (Main loop for the standalone kernel debugger) - -Configurations that have been declared obsolete in this release have -been commented out. Unless there is activity to revive these -configurations, the next release of GDB will have their sources -permanently REMOVED. - -* REMOVED configurations and files - -Altos 3068 m68*-altos-* -Convex c1-*-*, c2-*-* -Pyramid pyramid-*-* -ARM RISCix arm-*-* (as host) -Tahoe tahoe-*-* -ser-ocd.c *-*-* - -* GDB has been converted to ISO C. - -GDB's source code has been converted to ISO C. In particular, the -sources are fully protoized, and rely on standard headers being -present. - -* Other news: - -* "info symbol" works on platforms which use COFF, ECOFF, XCOFF, and NLM. - -* The MI enabled by default. - -The new machine oriented interface (MI) introduced in GDB 5.0 has been -revised and enabled by default. Packages which use GDB as a debugging -engine behind a UI or another front end are encouraged to switch to -using the GDB/MI interface, instead of the old annotations interface -which is now deprecated. - -* Support for debugging Pascal programs. - -GDB now includes support for debugging Pascal programs. The following -main features are supported: - - - Pascal-specific data types such as sets; - - - automatic recognition of Pascal sources based on file-name - extension; - - - Pascal-style display of data types, variables, and functions; - - - a Pascal expression parser. - -However, some important features are not yet supported. - - - Pascal string operations are not supported at all; - - - there are some problems with boolean types; - - - Pascal type hexadecimal constants are not supported - because they conflict with the internal variables format; - - - support for Pascal objects and classes is not full yet; - - - unlike Pascal, GDB is case-sensitive for symbol names. - -* Changes in completion. - -Commands such as `shell', `run' and `set args', which pass arguments -to inferior programs, now complete on file names, similar to what -users expect at the shell prompt. - -Commands which accept locations, such as `disassemble', `print', -`breakpoint', `until', etc. now complete on filenames as well as -program symbols. Thus, if you type "break foob TAB", and the source -files linked into the programs include `foobar.c', that file name will -be one of the candidates for completion. However, file names are not -considered for completion after you typed a colon that delimits a file -name from a name of a function in that file, as in "break foo.c:bar". - -`set demangle-style' completes on available demangling styles. - -* New platform-independent commands: - -It is now possible to define a post-hook for a command as well as a -hook that runs before the command. For more details, see the -documentation of `hookpost' in the GDB manual. - -* Changes in GNU/Linux native debugging. - -Support for debugging multi-threaded programs has been completely -revised for all platforms except m68k and sparc. You can now debug as -many threads as your system allows you to have. - -Attach/detach is supported for multi-threaded programs. - -Support for SSE registers was added for x86. This doesn't work for -multi-threaded programs though. - -* Changes in MIPS configurations. - -Multi-arch support is enabled for all MIPS configurations. - -GDB can now be built as native debugger on SGI Irix 6.x systems for -debugging n32 executables. (Debugging 64-bit executables is not yet -supported.) - -* Unified support for hardware watchpoints in all x86 configurations. - -Most (if not all) native x86 configurations support hardware-assisted -breakpoints and watchpoints in a unified manner. This support -implements debug register sharing between watchpoints, which allows to -put a virtually infinite number of watchpoints on the same address, -and also supports watching regions up to 16 bytes with several debug -registers. - -The new maintenance command `maintenance show-debug-regs' toggles -debugging print-outs in functions that insert, remove, and test -watchpoints and hardware breakpoints. - -* Changes in the DJGPP native configuration. - -New command ``info dos sysinfo'' displays assorted information about -the CPU, OS, memory, and DPMI server. - -New commands ``info dos gdt'', ``info dos ldt'', and ``info dos idt'' -display information about segment descriptors stored in GDT, LDT, and -IDT. - -New commands ``info dos pde'' and ``info dos pte'' display entries -from Page Directory and Page Tables (for now works with CWSDPMI only). -New command ``info dos address-pte'' displays the Page Table entry for -a given linear address. - -GDB can now pass command lines longer than 126 characters to the -program being debugged (requires an update to the libdbg.a library -which is part of the DJGPP development kit). - -DWARF2 debug info is now supported. - -It is now possible to `step' and `next' through calls to `longjmp'. - -* Changes in documentation. - -All GDB documentation was converted to GFDL, the GNU Free -Documentation License. - -Tracepoints-related commands are now fully documented in the GDB -manual. - -TUI, the Text-mode User Interface, is now documented in the manual. - -Tracepoints-related commands are now fully documented in the GDB -manual. - -The "GDB Internals" manual now has an index. It also includes -documentation of `ui_out' functions, GDB coding standards, x86 -hardware watchpoints, and memory region attributes. - -* GDB's version number moved to ``version.in'' - -The Makefile variable VERSION has been replaced by the file -``version.in''. People creating GDB distributions should update the -contents of this file. - -* gdba.el deleted - -GUD support is now a standard part of the EMACS distribution. - -*** Changes in GDB 5.0: - -* Improved support for debugging FP programs on x86 targets - -Unified and much-improved support for debugging floating-point -programs on all x86 targets. In particular, ``info float'' now -displays the FP registers in the same format on all x86 targets, with -greater level of detail. - -* Improvements and bugfixes in hardware-assisted watchpoints - -It is now possible to watch array elements, struct members, and -bitfields with hardware-assisted watchpoints. Data-read watchpoints -on x86 targets no longer erroneously trigger when the address is -written. - -* Improvements in the native DJGPP version of GDB - -The distribution now includes all the scripts and auxiliary files -necessary to build the native DJGPP version on MS-DOS/MS-Windows -machines ``out of the box''. - -The DJGPP version can now debug programs that use signals. It is -possible to catch signals that happened in the debuggee, deliver -signals to it, interrupt it with Ctrl-C, etc. (Previously, a signal -would kill the program being debugged.) Programs that hook hardware -interrupts (keyboard, timer, etc.) can also be debugged. - -It is now possible to debug DJGPP programs that redirect their -standard handles or switch them to raw (as opposed to cooked) mode, or -even close them. The command ``run < foo > bar'' works as expected, -and ``info terminal'' reports useful information about the debuggee's -terminal, including raw/cooked mode, redirection, etc. - -The DJGPP version now uses termios functions for console I/O, which -enables debugging graphics programs. Interrupting GDB with Ctrl-C -also works. - -DOS-style file names with drive letters are now fully supported by -GDB. - -It is now possible to debug DJGPP programs that switch their working -directory. It is also possible to rerun the debuggee any number of -times without restarting GDB; thus, you can use the same setup, -breakpoints, etc. for many debugging sessions. - -* New native configurations - -ARM GNU/Linux arm*-*-linux* -PowerPC GNU/Linux powerpc-*-linux* - -* New targets - -Motorola MCore mcore-*-* -x86 VxWorks i[3456]86-*-vxworks* -PowerPC VxWorks powerpc-*-vxworks* -TI TMS320C80 tic80-*-* - -* OBSOLETE configurations - -Altos 3068 m68*-altos-* -Convex c1-*-*, c2-*-* -Pyramid pyramid-*-* -ARM RISCix arm-*-* (as host) -Tahoe tahoe-*-* - -Configurations that have been declared obsolete will be commented out, -but the code will be left in place. If there is no activity to revive -these configurations before the next release of GDB, the sources will -be permanently REMOVED. - -* Gould support removed - -Support for the Gould PowerNode and NP1 has been removed. - -* New features for SVR4 - -On SVR4 native platforms (such as Solaris), if you attach to a process -without first loading a symbol file, GDB will now attempt to locate and -load symbols from the running process's executable file. - -* Many C++ enhancements - -C++ support has been greatly improved. Overload resolution now works properly -in almost all cases. RTTI support is on the way. - -* Remote targets can connect to a sub-program - -A popen(3) style serial-device has been added. This device starts a -sub-process (such as a stand-alone simulator) and then communicates -with that. The sub-program to run is specified using the syntax -``|<program> <args>'' vis: - - (gdb) set remotedebug 1 - (gdb) target extended-remote |mn10300-elf-sim program-args - -* MIPS 64 remote protocol - -A long standing bug in the mips64 remote protocol where by GDB -expected certain 32 bit registers (ex SR) to be transfered as 32 -instead of 64 bits has been fixed. - -The command ``set remote-mips64-transfers-32bit-regs on'' has been -added to provide backward compatibility with older versions of GDB. - -* ``set remotebinarydownload'' replaced by ``set remote X-packet'' - -The command ``set remotebinarydownload'' command has been replaced by -``set remote X-packet''. Other commands in ``set remote'' family -include ``set remote P-packet''. - -* Breakpoint commands accept ranges. - -The breakpoint commands ``enable'', ``disable'', and ``delete'' now -accept a range of breakpoints, e.g. ``5-7''. The tracepoint command -``tracepoint passcount'' also accepts a range of tracepoints. - -* ``apropos'' command added. - -The ``apropos'' command searches through command names and -documentation strings, printing out matches, making it much easier to -try to find a command that does what you are looking for. - -* New MI interface - -A new machine oriented interface (MI) has been added to GDB. This -interface is designed for debug environments running GDB as a separate -process. This is part of the long term libGDB project. See the -"GDB/MI" chapter of the GDB manual for further information. It can be -enabled by configuring with: - - .../configure --enable-gdbmi - -*** Changes in GDB-4.18: - -* New native configurations - -HP-UX 10.20 hppa*-*-hpux10.20 -HP-UX 11.x hppa*-*-hpux11.0* -M68K Linux m68*-*-linux* - -* New targets - -Fujitsu FR30 fr30-*-elf* -Intel StrongARM strongarm-*-* -Mitsubishi D30V d30v-*-* - -* OBSOLETE configurations - -Gould PowerNode, NP1 np1-*-*, pn-*-* - -Configurations that have been declared obsolete will be commented out, -but the code will be left in place. If there is no activity to revive -these configurations before the next release of GDB, the sources will -be permanently REMOVED. - -* ANSI/ISO C - -As a compatibility experiment, GDB's source files buildsym.h and -buildsym.c have been converted to pure standard C, no longer -containing any K&R compatibility code. We believe that all systems in -use today either come with a standard C compiler, or have a GCC port -available. If this is not true, please report the affected -configuration to bug-gdb@gnu.org immediately. See the README file for -information about getting a standard C compiler if you don't have one -already. - -* Readline 2.2 - -GDB now uses readline 2.2. - -* set extension-language - -You can now control the mapping between filename extensions and source -languages by using the `set extension-language' command. For instance, -you can ask GDB to treat .c files as C++ by saying - set extension-language .c c++ -The command `info extensions' lists all of the recognized extensions -and their associated languages. - -* Setting processor type for PowerPC and RS/6000 - -When GDB is configured for a powerpc*-*-* or an rs6000*-*-* target, -you can use the `set processor' command to specify what variant of the -PowerPC family you are debugging. The command - - set processor NAME - -sets the PowerPC/RS6000 variant to NAME. GDB knows about the -following PowerPC and RS6000 variants: - - ppc-uisa PowerPC UISA - a PPC processor as viewed by user-level code - rs6000 IBM RS6000 ("POWER") architecture, user-level view - 403 IBM PowerPC 403 - 403GC IBM PowerPC 403GC - 505 Motorola PowerPC 505 - 860 Motorola PowerPC 860 or 850 - 601 Motorola PowerPC 601 - 602 Motorola PowerPC 602 - 603 Motorola/IBM PowerPC 603 or 603e - 604 Motorola PowerPC 604 or 604e - 750 Motorola/IBM PowerPC 750 or 750 - -At the moment, this command just tells GDB what to name the -special-purpose processor registers. Since almost all the affected -registers are inaccessible to user-level programs, this command is -only useful for remote debugging in its present form. - -* HP-UX support - -Thanks to a major code donation from Hewlett-Packard, GDB now has much -more extensive support for HP-UX. Added features include shared -library support, kernel threads and hardware watchpoints for 11.00, -support for HP's ANSI C and C++ compilers, and a compatibility mode -for xdb and dbx commands. - -* Catchpoints - -HP's donation includes the new concept of catchpoints, which is a -generalization of the old catch command. On HP-UX, it is now possible -to catch exec, fork, and vfork, as well as library loading. - -This means that the existing catch command has changed; its first -argument now specifies the type of catch to be set up. See the -output of "help catch" for a list of catchpoint types. - -* Debugging across forks - -On HP-UX, you can choose which process to debug when a fork() happens -in the inferior. - -* TUI - -HP has donated a curses-based terminal user interface (TUI). To get -it, build with --enable-tui. Although this can be enabled for any -configuration, at present it only works for native HP debugging. - -* GDB remote protocol additions - -A new protocol packet 'X' that writes binary data is now available. -Default behavior is to try 'X', then drop back to 'M' if the stub -fails to respond. The settable variable `remotebinarydownload' -allows explicit control over the use of 'X'. - -For 64-bit targets, the memory packets ('M' and 'm') can now contain a -full 64-bit address. The command - - set remoteaddresssize 32 - -can be used to revert to the old behaviour. For existing remote stubs -the change should not be noticed, as the additional address information -will be discarded. - -In order to assist in debugging stubs, you may use the maintenance -command `packet' to send any text string to the stub. For instance, - - maint packet heythere - -sends the packet "$heythere#<checksum>". Note that it is very easy to -disrupt a debugging session by sending the wrong packet at the wrong -time. - -The compare-sections command allows you to compare section data on the -target to what is in the executable file without uploading or -downloading, by comparing CRC checksums. - -* Tracing can collect general expressions - -You may now collect general expressions at tracepoints. This requires -further additions to the target-side stub; see tracepoint.c and -doc/agentexpr.texi for further details. - -* mask-address variable for Mips - -For Mips targets, you may control the zeroing of the upper 32 bits of -a 64-bit address by entering `set mask-address on'. This is mainly -of interest to users of embedded R4xxx and R5xxx processors. - -* Higher serial baud rates - -GDB's serial code now allows you to specify baud rates 57600, 115200, -230400, and 460800 baud. (Note that your host system may not be able -to achieve all of these rates.) - -* i960 simulator - -The i960 configuration now includes an initial implementation of a -builtin simulator, contributed by Jim Wilson. - - -*** Changes in GDB-4.17: - -* New native configurations - -Alpha GNU/Linux alpha*-*-linux* -Unixware 2.x i[3456]86-unixware2* -Irix 6.x mips*-sgi-irix6* -PowerPC GNU/Linux powerpc-*-linux* -PowerPC Solaris powerpcle-*-solaris* -Sparc GNU/Linux sparc-*-linux* -Motorola sysV68 R3V7.1 m68k-motorola-sysv - -* New targets - -Argonaut Risc Chip (ARC) arc-*-* -Hitachi H8/300S h8300*-*-* -Matsushita MN10200 w/simulator mn10200-*-* -Matsushita MN10300 w/simulator mn10300-*-* -MIPS NEC VR4100 mips64*vr4100*{,el}-*-elf* -MIPS NEC VR5000 mips64*vr5000*{,el}-*-elf* -MIPS Toshiba TX39 mips64*tx39*{,el}-*-elf* -Mitsubishi D10V w/simulator d10v-*-* -Mitsubishi M32R/D w/simulator m32r-*-elf* -Tsqware Sparclet sparclet-*-* -NEC V850 w/simulator v850-*-* - -* New debugging protocols - -ARM with RDI protocol arm*-*-* -M68K with dBUG monitor m68*-*-{aout,coff,elf} -DDB and LSI variants of PMON protocol mips*-*-* -PowerPC with DINK32 monitor powerpc{,le}-*-eabi -PowerPC with SDS protocol powerpc{,le}-*-eabi -Macraigor OCD (Wiggler) devices powerpc{,le}-*-eabi - -* DWARF 2 - -All configurations can now understand and use the DWARF 2 debugging -format. The choice is automatic, if the symbol file contains DWARF 2 -information. - -* Java frontend - -GDB now includes basic Java language support. This support is -only useful with Java compilers that produce native machine code. - -* solib-absolute-prefix and solib-search-path - -For SunOS and SVR4 shared libraries, you may now set the prefix for -loading absolute shared library symbol files, and the search path for -locating non-absolute shared library symbol files. - -* Live range splitting - -GDB can now effectively debug code for which GCC has performed live -range splitting as part of its optimization. See gdb/doc/LRS for -more details on the expected format of the stabs information. - -* Hurd support - -GDB's support for the GNU Hurd, including thread debugging, has been -updated to work with current versions of the Hurd. - -* ARM Thumb support - -GDB's ARM target configuration now handles the ARM7T (Thumb) 16-bit -instruction set. ARM GDB automatically detects when Thumb -instructions are in use, and adjusts disassembly and backtracing -accordingly. - -* MIPS16 support - -GDB's MIPS target configurations now handle the MIP16 16-bit -instruction set. - -* Overlay support - -GDB now includes support for overlays; if an executable has been -linked such that multiple sections are based at the same address, GDB -will decide which section to use for symbolic info. You can choose to -control the decision manually, using overlay commands, or implement -additional target-side support and use "overlay load-target" to bring -in the overlay mapping. Do "help overlay" for more detail. - -* info symbol - -The command "info symbol <address>" displays information about -the symbol at the specified address. - -* Trace support - -The standard remote protocol now includes an extension that allows -asynchronous collection and display of trace data. This requires -extensive support in the target-side debugging stub. Tracing mode -includes a new interaction mode in GDB and new commands: see the -file tracepoint.c for more details. - -* MIPS simulator - -Configurations for embedded MIPS now include a simulator contributed -by Cygnus Solutions. The simulator supports the instruction sets -of most MIPS variants. - -* Sparc simulator - -Sparc configurations may now include the ERC32 simulator contributed -by the European Space Agency. The simulator is not built into -Sparc targets by default; configure with --enable-sim to include it. - -* set architecture - -For target configurations that may include multiple variants of a -basic architecture (such as MIPS and SH), you may now set the -architecture explicitly. "set arch" sets, "info arch" lists -the possible architectures. - -*** Changes in GDB-4.16: - -* New native configurations - -Windows 95, x86 Windows NT i[345]86-*-cygwin32 -M68K NetBSD m68k-*-netbsd* -PowerPC AIX 4.x powerpc-*-aix* -PowerPC MacOS powerpc-*-macos* -PowerPC Windows NT powerpcle-*-cygwin32 -RS/6000 AIX 4.x rs6000-*-aix4* - -* New targets - -ARM with RDP protocol arm-*-* -I960 with MON960 i960-*-coff -MIPS VxWorks mips*-*-vxworks* -MIPS VR4300 with PMON mips64*vr4300{,el}-*-elf* -PowerPC with PPCBUG monitor powerpc{,le}-*-eabi* -Hitachi SH3 sh-*-* -Matra Sparclet sparclet-*-* - -* PowerPC simulator - -The powerpc-eabi configuration now includes the PSIM simulator, -contributed by Andrew Cagney, with assistance from Mike Meissner. -PSIM is a very elaborate model of the PowerPC, including not only -basic instruction set execution, but also details of execution unit -performance and I/O hardware. See sim/ppc/README for more details. - -* Solaris 2.5 - -GDB now works with Solaris 2.5. - -* Windows 95/NT native - -GDB will now work as a native debugger on Windows 95 and Windows NT. -To build it from source, you must use the "gnu-win32" environment, -which uses a DLL to emulate enough of Unix to run the GNU tools. -Further information, binaries, and sources are available at -ftp.cygnus.com, under pub/gnu-win32. - -* dont-repeat command - -If a user-defined command includes the command `dont-repeat', then the -command will not be repeated if the user just types return. This is -useful if the command is time-consuming to run, so that accidental -extra keystrokes don't run the same command many times. - -* Send break instead of ^C - -The standard remote protocol now includes an option to send a break -rather than a ^C to the target in order to interrupt it. By default, -GDB will send ^C; to send a break, set the variable `remotebreak' to 1. - -* Remote protocol timeout - -The standard remote protocol includes a new variable `remotetimeout' -that allows you to set the number of seconds before GDB gives up trying -to read from the target. The default value is 2. - -* Automatic tracking of dynamic object loading (HPUX and Solaris only) - -By default GDB will automatically keep track of objects as they are -loaded and unloaded by the dynamic linker. By using the command `set -stop-on-solib-events 1' you can arrange for GDB to stop the inferior -when shared library events occur, thus allowing you to set breakpoints -in shared libraries which are explicitly loaded by the inferior. - -Note this feature does not work on hpux8. On hpux9 you must link -/usr/lib/end.o into your program. This feature should work -automatically on hpux10. - -* Irix 5.x hardware watchpoint support - -Irix 5 configurations now support the use of hardware watchpoints. - -* Mips protocol "SYN garbage limit" - -When debugging a Mips target using the `target mips' protocol, you -may set the number of characters that GDB will ignore by setting -the `syn-garbage-limit'. A value of -1 means that GDB will ignore -every character. The default value is 1050. - -* Recording and replaying remote debug sessions - -If you set `remotelogfile' to the name of a file, gdb will write to it -a recording of a remote debug session. This recording may then be -replayed back to gdb using "gdbreplay". See gdbserver/README for -details. This is useful when you have a problem with GDB while doing -remote debugging; you can make a recording of the session and send it -to someone else, who can then recreate the problem. - -* Speedups for remote debugging - -GDB includes speedups for downloading and stepping MIPS systems using -the IDT monitor, fast downloads to the Hitachi SH E7000 emulator, -and more efficient S-record downloading. - -* Memory use reductions and statistics collection - -GDB now uses less memory and reports statistics about memory usage. -Try the `maint print statistics' command, for example. - -*** Changes in GDB-4.15: - -* Psymtabs for XCOFF - -The symbol reader for AIX GDB now uses partial symbol tables. This -can greatly improve startup time, especially for large executables. - -* Remote targets use caching - -Remote targets now use a data cache to speed up communication with the -remote side. The data cache could lead to incorrect results because -it doesn't know about volatile variables, thus making it impossible to -debug targets which use memory mapped I/O devices. `set remotecache -off' turns the the data cache off. - -* Remote targets may have threads - -The standard remote protocol now includes support for multiple threads -in the target system, using new protocol commands 'H' and 'T'. See -gdb/remote.c for details. - -* NetROM support - -If GDB is configured with `--enable-netrom', then it will include -support for the NetROM ROM emulator from XLNT Designs. The NetROM -acts as though it is a bank of ROM on the target board, but you can -write into it over the network. GDB's support consists only of -support for fast loading into the emulated ROM; to debug, you must use -another protocol, such as standard remote protocol. The usual -sequence is something like - - target nrom <netrom-hostname> - load <prog> - target remote <netrom-hostname>:1235 - -* Macintosh host - -GDB now includes support for the Apple Macintosh, as a host only. It -may be run as either an MPW tool or as a standalone application, and -it can debug through the serial port. All the usual GDB commands are -available, but to the target command, you must supply "serial" as the -device type instead of "/dev/ttyXX". See mpw-README in the main -directory for more information on how to build. The MPW configuration -scripts */mpw-config.in support only a few targets, and only the -mips-idt-ecoff target has been tested. - -* Autoconf - -GDB configuration now uses autoconf. This is not user-visible, -but does simplify configuration and building. - -* hpux10 - -GDB now supports hpux10. - -*** Changes in GDB-4.14: - -* New native configurations - -x86 FreeBSD i[345]86-*-freebsd -x86 NetBSD i[345]86-*-netbsd -NS32k NetBSD ns32k-*-netbsd -Sparc NetBSD sparc-*-netbsd - -* New targets - -A29K VxWorks a29k-*-vxworks -HP PA PRO embedded (WinBond W89K & Oki OP50N) hppa*-*-pro* -CPU32 EST-300 emulator m68*-*-est* -PowerPC ELF powerpc-*-elf -WDC 65816 w65-*-* - -* Alpha OSF/1 support for procfs - -GDB now supports procfs under OSF/1-2.x and higher, which makes it -possible to attach to running processes. As the mounting of the /proc -filesystem is optional on the Alpha, GDB automatically determines -the availability of /proc during startup. This can lead to problems -if /proc is unmounted after GDB has been started. - -* Arguments to user-defined commands - -User commands may accept up to 10 arguments separated by whitespace. -Arguments are accessed within the user command via $arg0..$arg9. A -trivial example: -define adder - print $arg0 + $arg1 + $arg2 - -To execute the command use: -adder 1 2 3 - -Defines the command "adder" which prints the sum of its three arguments. -Note the arguments are text substitutions, so they may reference variables, -use complex expressions, or even perform inferior function calls. - -* New `if' and `while' commands - -This makes it possible to write more sophisticated user-defined -commands. Both commands take a single argument, which is the -expression to evaluate, and must be followed by the commands to -execute, one per line, if the expression is nonzero, the list being -terminated by the word `end'. The `if' command list may include an -`else' word, which causes the following commands to be executed only -if the expression is zero. - -* Fortran source language mode - -GDB now includes partial support for Fortran 77. It will recognize -Fortran programs and can evaluate a subset of Fortran expressions, but -variables and functions may not be handled correctly. GDB will work -with G77, but does not yet know much about symbols emitted by other -Fortran compilers. - -* Better HPUX support - -Most debugging facilities now work on dynamic executables for HPPAs -running hpux9 or later. You can attach to running dynamically linked -processes, but by default the dynamic libraries will be read-only, so -for instance you won't be able to put breakpoints in them. To change -that behavior do the following before running the program: - - adb -w a.out - __dld_flags?W 0x5 - control-d - -This will cause the libraries to be mapped private and read-write. -To revert to the normal behavior, do this: - - adb -w a.out - __dld_flags?W 0x4 - control-d - -You cannot set breakpoints or examine data in the library until after -the library is loaded if the function/data symbols do not have -external linkage. - -GDB can now also read debug symbols produced by the HP C compiler on -HPPAs (sorry, no C++, Fortran or 68k support). - -* Target byte order now dynamically selectable - -You can choose which byte order to use with a target system, via the -commands "set endian big" and "set endian little", and you can see the -current setting by using "show endian". You can also give the command -"set endian auto", in which case GDB will use the byte order -associated with the executable. Currently, only embedded MIPS -configurations support dynamic selection of target byte order. - -* New DOS host serial code - -This version uses DPMI interrupts to handle buffered I/O, so you -no longer need to run asynctsr when debugging boards connected to -a PC's serial port. - -*** Changes in GDB-4.13: - -* New "complete" command - -This lists all the possible completions for the rest of the line, if it -were to be given as a command itself. This is intended for use by emacs. - -* Trailing space optional in prompt - -"set prompt" no longer adds a space for you after the prompt you set. This -allows you to set a prompt which ends in a space or one that does not. - -* Breakpoint hit counts - -"info break" now displays a count of the number of times the breakpoint -has been hit. This is especially useful in conjunction with "ignore"; you -can ignore a large number of breakpoint hits, look at the breakpoint info -to see how many times the breakpoint was hit, then run again, ignoring one -less than that number, and this will get you quickly to the last hit of -that breakpoint. - -* Ability to stop printing at NULL character - -"set print null-stop" will cause GDB to stop printing the characters of -an array when the first NULL is encountered. This is useful when large -arrays actually contain only short strings. - -* Shared library breakpoints - -In SunOS 4.x, SVR4, and Alpha OSF/1 configurations, you can now set -breakpoints in shared libraries before the executable is run. - -* Hardware watchpoints - -There is a new hardware breakpoint for the watch command for sparclite -targets. See gdb/sparclite/hw_breakpoint.note. - -Hardware watchpoints are also now supported under Linux. - -* Annotations - -Annotations have been added. These are for use with graphical interfaces, -and are still experimental. Currently only gdba.el uses these. - -* Improved Irix 5 support - -GDB now works properly with Irix 5.2. - -* Improved HPPA support - -GDB now works properly with the latest GCC and GAS. - -* New native configurations - -Sequent PTX4 i[34]86-sequent-ptx4 -HPPA running OSF/1 hppa*-*-osf* -Atari TT running SVR4 m68*-*-sysv4* -RS/6000 LynxOS rs6000-*-lynxos* - -* New targets - -OS/9000 i[34]86-*-os9k -MIPS R4000 mips64*{,el}-*-{ecoff,elf} -Sparc64 sparc64-*-* - -* Hitachi SH7000 and E7000-PC ICE support - -There is now support for communicating with the Hitachi E7000-PC ICE. -This is available automatically when GDB is configured for the SH. - -* Fixes - -As usual, a variety of small fixes and improvements, both generic -and configuration-specific. See the ChangeLog for more detail. - -*** Changes in GDB-4.12: - -* Irix 5 is now supported - -* HPPA support - -GDB-4.12 on the HPPA has a number of changes which make it unable -to debug the output from the currently released versions of GCC and -GAS (GCC 2.5.8 and GAS-2.2 or PAGAS-1.36). Until the next major release -of GCC and GAS, versions of these tools designed to work with GDB-4.12 -can be retrieved via anonymous ftp from jaguar.cs.utah.edu:/dist. - - -*** Changes in GDB-4.11: - -* User visible changes: - -* Remote Debugging - -The "set remotedebug" option is now consistent between the mips remote -target, remote targets using the gdb-specific protocol, UDI (AMD's -debug protocol for the 29k) and the 88k bug monitor. It is now an -integer specifying a debug level (normally 0 or 1, but 2 means more -debugging info for the mips target). - -* DEC Alpha native support - -GDB now works on the DEC Alpha. GCC 2.4.5 does not produce usable -debug info, but GDB works fairly well with the DEC compiler and should -work with a future GCC release. See the README file for a few -Alpha-specific notes. - -* Preliminary thread implementation - -GDB now has preliminary thread support for both SGI/Irix and LynxOS. - -* LynxOS native and target support for 386 - -This release has been hosted on LynxOS 2.2, and also can be configured -to remotely debug programs running under LynxOS (see gdb/gdbserver/README -for details). - -* Improvements in C++ mangling/demangling. - -This release has much better g++ debugging, specifically in name -mangling/demangling, virtual function calls, print virtual table, -call methods, ...etc. - -*** Changes in GDB-4.10: - - * User visible changes: - -Remote debugging using the GDB-specific (`target remote') protocol now -supports the `load' command. This is only useful if you have some -other way of getting the stub to the target system, and you can put it -somewhere in memory where it won't get clobbered by the download. - -Filename completion now works. - -When run under emacs mode, the "info line" command now causes the -arrow to point to the line specified. Also, "info line" prints -addresses in symbolic form (as well as hex). - -All vxworks based targets now support a user settable option, called -vxworks-timeout. This option represents the number of seconds gdb -should wait for responses to rpc's. You might want to use this if -your vxworks target is, perhaps, a slow software simulator or happens -to be on the far side of a thin network line. - - * DEC alpha support - -This release contains support for using a DEC alpha as a GDB host for -cross debugging. Native alpha debugging is not supported yet. - - -*** Changes in GDB-4.9: - - * Testsuite - -This is the first GDB release which is accompanied by a matching testsuite. -The testsuite requires installation of dejagnu, which should be available -via ftp from most sites that carry GNU software. - - * C++ demangling - -'Cfront' style demangling has had its name changed to 'ARM' style, to -emphasize that it was written from the specifications in the C++ Annotated -Reference Manual, not necessarily to be compatible with AT&T cfront. Despite -disclaimers, it still generated too much confusion with users attempting to -use gdb with AT&T cfront. - - * Simulators - -GDB now uses a standard remote interface to a simulator library. -So far, the library contains simulators for the Zilog Z8001/2, the -Hitachi H8/300, H8/500 and Super-H. - - * New targets supported - -H8/300 simulator h8300-hitachi-hms or h8300hms -H8/500 simulator h8500-hitachi-hms or h8500hms -SH simulator sh-hitachi-hms or sh -Z8000 simulator z8k-zilog-none or z8ksim -IDT MIPS board over serial line mips-idt-ecoff - -Cross-debugging to GO32 targets is supported. It requires a custom -version of the i386-stub.c module which is integrated with the -GO32 memory extender. - - * New remote protocols - -MIPS remote debugging protocol. - - * New source languages supported - -This version includes preliminary support for Chill, a Pascal like language -used by telecommunications companies. Chill support is also being integrated -into the GNU compiler, but we don't know when it will be publically available. - - -*** Changes in GDB-4.8: - - * HP Precision Architecture supported - -GDB now supports HP PA-RISC machines running HPUX. A preliminary -version of this support was available as a set of patches from the -University of Utah. GDB does not support debugging of programs -compiled with the HP compiler, because HP will not document their file -format. Instead, you must use GCC (version 2.3.2 or later) and PA-GAS -(as available from jaguar.cs.utah.edu:/dist/pa-gas.u4.tar.Z). - -Many problems in the preliminary version have been fixed. - - * Faster and better demangling - -We have improved template demangling and fixed numerous bugs in the GNU style -demangler. It can now handle type modifiers such as `static' or `const'. Wide -character types (wchar_t) are now supported. Demangling of each symbol is now -only done once, and is cached when the symbol table for a file is read in. -This results in a small increase in memory usage for C programs, a moderate -increase in memory usage for C++ programs, and a fantastic speedup in -symbol lookups. - -`Cfront' style demangling still doesn't work with AT&T cfront. It was written -from the specifications in the Annotated Reference Manual, which AT&T's -compiler does not actually implement. - - * G++ multiple inheritance compiler problem - -In the 2.3.2 release of gcc/g++, how the compiler resolves multiple -inheritance lattices was reworked to properly discover ambiguities. We -recently found an example which causes this new algorithm to fail in a -very subtle way, producing bad debug information for those classes. -The file 'gcc.patch' (in this directory) can be applied to gcc to -circumvent the problem. A future GCC release will contain a complete -fix. - -The previous G++ debug info problem (mentioned below for the gdb-4.7 -release) is fixed in gcc version 2.3.2. - - * Improved configure script - -The `configure' script will now attempt to guess your system type if -you don't supply a host system type. The old scheme of supplying a -host system triplet is preferable over using this. All the magic is -done in the new `config.guess' script. Examine it for details. - -We have also brought our configure script much more in line with the FSF's -version. It now supports the --with-xxx options. In particular, -`--with-minimal-bfd' can be used to make the GDB binary image smaller. -The resulting GDB will not be able to read arbitrary object file formats -- -only the format ``expected'' to be used on the configured target system. -We hope to make this the default in a future release. - - * Documentation improvements - -There's new internal documentation on how to modify GDB, and how to -produce clean changes to the code. We implore people to read it -before submitting changes. - -The GDB manual uses new, sexy Texinfo conditionals, rather than arcane -M4 macros. The new texinfo.tex is provided in this release. Pre-built -`info' files are also provided. To build `info' files from scratch, -you will need the latest `makeinfo' release, which will be available in -a future texinfo-X.Y release. - -*NOTE* The new texinfo.tex can cause old versions of TeX to hang. -We're not sure exactly which versions have this problem, but it has -been seen in 3.0. We highly recommend upgrading to TeX version 3.141 -or better. If that isn't possible, there is a patch in -`texinfo/tex3patch' that will modify `texinfo/texinfo.tex' to work -around this problem. - - * New features - -GDB now supports array constants that can be used in expressions typed in by -the user. The syntax is `{element, element, ...}'. Ie: you can now type -`print {1, 2, 3}', and it will build up an array in memory malloc'd in -the target program. - -The new directory `gdb/sparclite' contains a program that demonstrates -how the sparc-stub.c remote stub runs on a Fujitsu SPARClite processor. - - * New native hosts supported - -HP/PA-RISC under HPUX using GNU tools hppa1.1-hp-hpux -386 CPUs running SCO Unix 3.2v4 i386-unknown-sco3.2v4 - - * New targets supported - -AMD 29k family via UDI a29k-amd-udi or udi29k - - * New file formats supported - -BFD now supports reading HP/PA-RISC executables (SOM file format?), -HPUX core files, and SCO 3.2v2 core files. - - * Major bug fixes - -Attaching to processes now works again; thanks for the many bug reports. - -We have also stomped on a bunch of core dumps caused by -printf_filtered("%s") problems. - -We eliminated a copyright problem on the rpc and ptrace header files -for VxWorks, which was discovered at the last minute during the 4.7 -release. You should now be able to build a VxWorks GDB. - -You can now interrupt gdb while an attached process is running. This -will cause the attached process to stop, and give control back to GDB. - -We fixed problems caused by using too many file descriptors -for reading symbols from object files and libraries. This was -especially a problem for programs that used many (~100) shared -libraries. - -The `step' command now only enters a subroutine if there is line number -information for the subroutine. Otherwise it acts like the `next' -command. Previously, `step' would enter subroutines if there was -any debugging information about the routine. This avoids problems -when using `cc -g1' on MIPS machines. - - * Internal improvements - -GDB's internal interfaces have been improved to make it easier to support -debugging of multiple languages in the future. - -GDB now uses a common structure for symbol information internally. -Minimal symbols (derived from linkage symbols in object files), partial -symbols (from a quick scan of debug information), and full symbols -contain a common subset of information, making it easier to write -shared code that handles any of them. - - * New command line options - -We now accept --silent as an alias for --quiet. - - * Mmalloc licensing - -The memory-mapped-malloc library is now licensed under the GNU Library -General Public License. - -*** Changes in GDB-4.7: - - * Host/native/target split - -GDB has had some major internal surgery to untangle the support for -hosts and remote targets. Now, when you configure GDB for a remote -target, it will no longer load in all of the support for debugging -local programs on the host. When fully completed and tested, this will -ensure that arbitrary host/target combinations are possible. - -The primary conceptual shift is to separate the non-portable code in -GDB into three categories. Host specific code is required any time GDB -is compiled on that host, regardless of the target. Target specific -code relates to the peculiarities of the target, but can be compiled on -any host. Native specific code is everything else: it can only be -built when the host and target are the same system. Child process -handling and core file support are two common `native' examples. - -GDB's use of /proc for controlling Unix child processes is now cleaner. -It has been split out into a single module under the `target_ops' vector, -plus two native-dependent functions for each system that uses /proc. - - * New hosts supported - -HP/Apollo 68k (under the BSD domain) m68k-apollo-bsd or apollo68bsd -386 CPUs running various BSD ports i386-unknown-bsd or 386bsd -386 CPUs running SCO Unix i386-unknown-scosysv322 or i386sco - - * New targets supported - -Fujitsu SPARClite sparclite-fujitsu-none or sparclite -68030 and CPU32 m68030-*-*, m68332-*-* - - * New native hosts supported - -386 CPUs running various BSD ports i386-unknown-bsd or 386bsd - (386bsd is not well tested yet) -386 CPUs running SCO Unix i386-unknown-scosysv322 or sco - - * New file formats supported - -BFD now supports COFF files for the Zilog Z8000 microprocessor. It -supports reading of `a.out.adobe' object files, which are an a.out -format extended with minimal information about multiple sections. - - * New commands - -`show copying' is the same as the old `info copying'. -`show warranty' is the same as `info warrantee'. -These were renamed for consistency. The old commands continue to work. - -`info handle' is a new alias for `info signals'. - -You can now define pre-command hooks, which attach arbitrary command -scripts to any command. The commands in the hook will be executed -prior to the user's command. You can also create a hook which will be -executed whenever the program stops. See gdb.texinfo. - - * C++ improvements - -We now deal with Cfront style name mangling, and can even extract type -info from mangled symbols. GDB can automatically figure out which -symbol mangling style your C++ compiler uses. - -Calling of methods and virtual functions has been improved as well. - - * Major bug fixes - -The crash that occured when debugging Sun Ansi-C compiled binaries is -fixed. This was due to mishandling of the extra N_SO stabs output -by the compiler. - -We also finally got Ultrix 4.2 running in house, and fixed core file -support, with help from a dozen people on the net. - -John M. Farrell discovered that the reason that single-stepping was so -slow on all of the Mips based platforms (primarily SGI and DEC) was -that we were trying to demangle and lookup a symbol used for internal -purposes on every instruction that was being stepped through. Changing -the name of that symbol so that it couldn't be mistaken for a C++ -mangled symbol sped things up a great deal. - -Rich Pixley sped up symbol lookups in general by getting much smarter -about when C++ symbol mangling is necessary. This should make symbol -completion (TAB on the command line) much faster. It's not as fast as -we'd like, but it's significantly faster than gdb-4.6. - - * AMD 29k support - -A new user controllable variable 'call_scratch_address' can -specify the location of a scratch area to be used when GDB -calls a function in the target. This is necessary because the -usual method of putting the scratch area on the stack does not work -in systems that have separate instruction and data spaces. - -We integrated changes to support the 29k UDI (Universal Debugger -Interface), but discovered at the last minute that we didn't have all -of the appropriate copyright paperwork. We are working with AMD to -resolve this, and hope to have it available soon. - - * Remote interfaces - -We have sped up the remote serial line protocol, especially for targets -with lots of registers. It now supports a new `expedited status' ('T') -message which can be used in place of the existing 'S' status message. -This allows the remote stub to send only the registers that GDB -needs to make a quick decision about single-stepping or conditional -breakpoints, eliminating the need to fetch the entire register set for -each instruction being stepped through. - -The GDB remote serial protocol now implements a write-through cache for -registers, only re-reading the registers if the target has run. - -There is also a new remote serial stub for SPARC processors. You can -find it in gdb-4.7/gdb/sparc-stub.c. This was written to support the -Fujitsu SPARClite processor, but will run on any stand-alone SPARC -processor with a serial port. - - * Configuration - -Configure.in files have become much easier to read and modify. A new -`table driven' format makes it more obvious what configurations are -supported, and what files each one uses. - - * Library changes - -There is a new opcodes library which will eventually contain all of the -disassembly routines and opcode tables. At present, it only contains -Sparc and Z8000 routines. This will allow the assembler, debugger, and -disassembler (binutils/objdump) to share these routines. - -The libiberty library is now copylefted under the GNU Library General -Public License. This allows more liberal use, and was done so libg++ -can use it. This makes no difference to GDB, since the Library License -grants all the rights from the General Public License. - - * Documentation - -The file gdb-4.7/gdb/doc/stabs.texinfo is a (relatively) complete -reference to the stabs symbol info used by the debugger. It is (as far -as we know) the only published document on this fascinating topic. We -encourage you to read it, compare it to the stabs information on your -system, and send improvements on the document in general (to -bug-gdb@prep.ai.mit.edu). - -And, of course, many bugs have been fixed. - - -*** Changes in GDB-4.6: - - * Better support for C++ function names - -GDB now accepts as input the "demangled form" of C++ overloaded function -names and member function names, and can do command completion on such names -(using TAB, TAB-TAB, and ESC-?). The names have to be quoted with a pair of -single quotes. Examples are 'func (int, long)' and 'obj::operator==(obj&)'. -Make use of command completion, it is your friend. - -GDB also now accepts a variety of C++ mangled symbol formats. They are -the GNU g++ style, the Cfront (ARM) style, and the Lucid (lcc) style. -You can tell GDB which format to use by doing a 'set demangle-style {gnu, -lucid, cfront, auto}'. 'gnu' is the default. Do a 'set demangle-style foo' -for the list of formats. - - * G++ symbol mangling problem - -Recent versions of gcc have a bug in how they emit debugging information for -C++ methods (when using dbx-style stabs). The file 'gcc.patch' (in this -directory) can be applied to gcc to fix the problem. Alternatively, if you -can't fix gcc, you can #define GCC_MANGLE_BUG when compling gdb/symtab.c. The -usual symptom is difficulty with setting breakpoints on methods. GDB complains -about the method being non-existent. (We believe that version 2.2.2 of GCC has -this problem.) - - * New 'maintenance' command - -All of the commands related to hacking GDB internals have been moved out of -the main command set, and now live behind the 'maintenance' command. This -can also be abbreviated as 'mt'. The following changes were made: - - dump-me -> maintenance dump-me - info all-breakpoints -> maintenance info breakpoints - printmsyms -> maintenance print msyms - printobjfiles -> maintenance print objfiles - printpsyms -> maintenance print psymbols - printsyms -> maintenance print symbols - -The following commands are new: - - maintenance demangle Call internal GDB demangler routine to - demangle a C++ link name and prints the result. - maintenance print type Print a type chain for a given symbol - - * Change to .gdbinit file processing - -We now read the $HOME/.gdbinit file before processing the argv arguments -(e.g. reading symbol files or core files). This allows global parameters to -be set, which will apply during the symbol reading. The ./.gdbinit is still -read after argv processing. - - * New hosts supported - -Solaris-2.0 !!! sparc-sun-solaris2 or sun4sol2 - -Linux support i386-unknown-linux or linux - -We are also including code to support the HP/PA running BSD and HPUX. This -is almost guaranteed not to work, as we didn't have time to test or build it -for this release. We are including it so that the more adventurous (or -masochistic) of you can play with it. We also had major problems with the -fact that the compiler that we got from HP doesn't support the -g option. -It costs extra. - - * New targets supported - -Hitachi H8/300 h8300-hitachi-hms or h8300hms - - * More smarts about finding #include files - -GDB now remembers the compilation directory for all include files, and for -all files from which C is generated (like yacc and lex sources). This -greatly improves GDB's ability to find yacc/lex sources, and include files, -especially if you are debugging your program from a directory different from -the one that contains your sources. - -We also fixed a bug which caused difficulty with listing and setting -breakpoints in include files which contain C code. (In the past, you had to -try twice in order to list an include file that you hadn't looked at before.) - - * Interesting infernals change - -GDB now deals with arbitrary numbers of sections, where the symbols for each -section must be relocated relative to that section's landing place in the -target's address space. This work was needed to support ELF with embedded -stabs used by Solaris-2.0. - - * Bug fixes (of course!) - -There have been loads of fixes for the following things: - mips, rs6000, 29k/udi, m68k, g++, type handling, elf/dwarf, m88k, - i960, stabs, DOS(GO32), procfs, etc... - -See the ChangeLog for details. - -*** Changes in GDB-4.5: - - * New machines supported (host and target) - -IBM RS6000 running AIX rs6000-ibm-aix or rs6000 - -SGI Irix-4.x mips-sgi-irix4 or iris4 - - * New malloc package - -GDB now uses a new memory manager called mmalloc, based on gmalloc. -Mmalloc is capable of handling mutiple heaps of memory. It is also -capable of saving a heap to a file, and then mapping it back in later. -This can be used to greatly speedup the startup of GDB by using a -pre-parsed symbol table which lives in a mmalloc managed heap. For -more details, please read mmalloc/mmalloc.texi. - - * info proc - -The 'info proc' command (SVR4 only) has been enhanced quite a bit. See -'help info proc' for details. - - * MIPS ecoff symbol table format - -The code that reads MIPS symbol table format is now supported on all hosts. -Thanks to MIPS for releasing the sym.h and symconst.h files to make this -possible. - - * File name changes for MS-DOS - -Many files in the config directories have been renamed to make it easier to -support GDB on MS-DOSe systems (which have very restrictive file name -conventions :-( ). MS-DOSe host support (under DJ Delorie's GO32 -environment) is close to working but has some remaining problems. Note -that debugging of DOS programs is not supported, due to limitations -in the ``operating system'', but it can be used to host cross-debugging. - - * Cross byte order fixes - -Many fixes have been made to support cross debugging of Sparc and MIPS -targets from hosts whose byte order differs. - - * New -mapped and -readnow options - -If memory-mapped files are available on your system through the 'mmap' -system call, you can use the -mapped option on the `file' or -`symbol-file' commands to cause GDB to write the symbols from your -program into a reusable file. If the program you are debugging is -called `/path/fred', the mapped symbol file will be `./fred.syms'. -Future GDB debugging sessions will notice the presence of this file, -and will quickly map in symbol information from it, rather than reading -the symbol table from the executable program. Using the '-mapped' -option in a GDB `file' or `symbol-file' command has the same effect as -starting GDB with the '-mapped' command-line option. - -You can cause GDB to read the entire symbol table immediately by using -the '-readnow' option with any of the commands that load symbol table -information (or on the GDB command line). This makes the command -slower, but makes future operations faster. - -The -mapped and -readnow options are typically combined in order to -build a `fred.syms' file that contains complete symbol information. -A simple GDB invocation to do nothing but build a `.syms' file for future -use is: - - gdb -batch -nx -mapped -readnow programname - -The `.syms' file is specific to the host machine on which GDB is run. -It holds an exact image of GDB's internal symbol table. It cannot be -shared across multiple host platforms. - - * longjmp() handling - -GDB is now capable of stepping and nexting over longjmp(), _longjmp(), and -siglongjmp() without losing control. This feature has not yet been ported to -all systems. It currently works on many 386 platforms, all MIPS-based -platforms (SGI, DECstation, etc), and Sun3/4. - - * Solaris 2.0 - -Preliminary work has been put in to support the new Solaris OS from Sun. At -this time, it can control and debug processes, but it is not capable of -reading symbols. - - * Bug fixes - -As always, many many bug fixes. The major areas were with g++, and mipsread. -People using the MIPS-based platforms should experience fewer mysterious -crashes and trashed symbol tables. - -*** Changes in GDB-4.4: - - * New machines supported (host and target) - -SCO Unix on i386 IBM PC clones i386-sco-sysv or i386sco - (except core files) -BSD Reno on Vax vax-dec-bsd -Ultrix on Vax vax-dec-ultrix - - * New machines supported (target) - -AMD 29000 embedded, using EBMON a29k-none-none - - * C++ support - -GDB continues to improve its handling of C++. `References' work better. -The demangler has also been improved, and now deals with symbols mangled as -per the Annotated C++ Reference Guide. - -GDB also now handles `stabs' symbol information embedded in MIPS -`ecoff' symbol tables. Since the ecoff format was not easily -extensible to handle new languages such as C++, this appeared to be a -good way to put C++ debugging info into MIPS binaries. This option -will be supported in the GNU C compiler, version 2, when it is -released. - - * New features for SVR4 - -GDB now handles SVR4 shared libraries, in the same fashion as SunOS -shared libraries. Debugging dynamically linked programs should present -only minor differences from debugging statically linked programs. - -The `info proc' command will print out information about any process -on an SVR4 system (including the one you are debugging). At the moment, -it prints the address mappings of the process. - -If you bring up GDB on another SVR4 system, please send mail to -bug-gdb@prep.ai.mit.edu to let us know what changes were reqired (if any). - - * Better dynamic linking support in SunOS - -Reading symbols from shared libraries which contain debugging symbols -now works properly. However, there remain issues such as automatic -skipping of `transfer vector' code during function calls, which -make it harder to debug code in a shared library, than to debug the -same code linked statically. - - * New Getopt - -GDB is now using the latest `getopt' routines from the FSF. This -version accepts the -- prefix for options with long names. GDB will -continue to accept the old forms (-option and +option) as well. -Various single letter abbreviations for options have been explicity -added to the option table so that they won't get overshadowed in the -future by other options that begin with the same letter. - - * Bugs fixed - -The `cleanup_undefined_types' bug that many of you noticed has been squashed. -Many assorted bugs have been handled. Many more remain to be handled. -See the various ChangeLog files (primarily in gdb and bfd) for details. - - -*** Changes in GDB-4.3: - - * New machines supported (host and target) - -Amiga 3000 running Amix m68k-cbm-svr4 or amix -NCR 3000 386 running SVR4 i386-ncr-svr4 or ncr3000 -Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88 - - * Almost SCO Unix support - -We had hoped to support: -SCO Unix on i386 IBM PC clones i386-sco-sysv or i386sco -(except for core file support), but we discovered very late in the release -that it has problems with process groups that render gdb unusable. Sorry -about that. I encourage people to fix it and post the fixes. - - * Preliminary ELF and DWARF support - -GDB can read ELF object files on System V Release 4, and can handle -debugging records for C, in DWARF format, in ELF files. This support -is preliminary. If you bring up GDB on another SVR4 system, please -send mail to bug-gdb@prep.ai.mit.edu to let us know what changes were -reqired (if any). - - * New Readline - -GDB now uses the latest `readline' library. One user-visible change -is that two tabs will list possible command completions, which previously -required typing M-? (meta-question mark, or ESC ?). - - * Bugs fixed - -The `stepi' bug that many of you noticed has been squashed. -Many bugs in C++ have been handled. Many more remain to be handled. -See the various ChangeLog files (primarily in gdb and bfd) for details. - - * State of the MIPS world (in case you wondered): - -GDB can understand the symbol tables emitted by the compilers -supplied by most vendors of MIPS-based machines, including DEC. These -symbol tables are in a format that essentially nobody else uses. - -Some versions of gcc come with an assembler post-processor called -mips-tfile. This program is required if you want to do source-level -debugging of gcc-compiled programs. I believe FSF does not ship -mips-tfile with gcc version 1, but it will eventually come with gcc -version 2. - -Debugging of g++ output remains a problem. g++ version 1.xx does not -really support it at all. (If you're lucky, you should be able to get -line numbers and stack traces to work, but no parameters or local -variables.) With some work it should be possible to improve the -situation somewhat. - -When gcc version 2 is released, you will have somewhat better luck. -However, even then you will get confusing results for inheritance and -methods. - -We will eventually provide full debugging of g++ output on -DECstations. This will probably involve some kind of stabs-in-ecoff -encapulation, but the details have not been worked out yet. - - -*** Changes in GDB-4.2: - - * Improved configuration - -Only one copy of `configure' exists now, and it is not self-modifying. -Porting BFD is simpler. - - * Stepping improved - -The `step' and `next' commands now only stop at the first instruction -of a source line. This prevents the multiple stops that used to occur -in switch statements, for-loops, etc. `Step' continues to stop if a -function that has debugging information is called within the line. - - * Bug fixing - -Lots of small bugs fixed. More remain. - - * New host supported (not target) - -Intel 386 PC clone running Mach i386-none-mach - - -*** Changes in GDB-4.1: - - * Multiple source language support - -GDB now has internal scaffolding to handle several source languages. -It determines the type of each source file from its filename extension, -and will switch expression parsing and number formatting to match the -language of the function in the currently selected stack frame. -You can also specifically set the language to be used, with -`set language c' or `set language modula-2'. - - * GDB and Modula-2 - -GDB now has preliminary support for the GNU Modula-2 compiler, -currently under development at the State University of New York at -Buffalo. Development of both GDB and the GNU Modula-2 compiler will -continue through the fall of 1991 and into 1992. - -Other Modula-2 compilers are currently not supported, and attempting to -debug programs compiled with them will likely result in an error as the -symbol table is read. Feel free to work on it, though! - -There are hooks in GDB for strict type checking and range checking, -in the `Modula-2 philosophy', but they do not currently work. - - * set write on/off - -GDB can now write to executable and core files (e.g. patch -a variable's value). You must turn this switch on, specify -the file ("exec foo" or "core foo"), *then* modify it, e.g. -by assigning a new value to a variable. Modifications take -effect immediately. - - * Automatic SunOS shared library reading - -When you run your program, GDB automatically determines where its -shared libraries (if any) have been loaded, and reads their symbols. -The `share' command is no longer needed. This also works when -examining core files. - - * set listsize - -You can specify the number of lines that the `list' command shows. -The default is 10. - - * New machines supported (host and target) - -SGI Iris (MIPS) running Irix V3: mips-sgi-irix or iris -Sony NEWS (68K) running NEWSOS 3.x: m68k-sony-sysv or news -Ultracomputer (29K) running Sym1: a29k-nyu-sym1 or ultra3 - - * New hosts supported (not targets) - -IBM RT/PC: romp-ibm-aix or rtpc - - * New targets supported (not hosts) - -AMD 29000 embedded with COFF a29k-none-coff -AMD 29000 embedded with a.out a29k-none-aout -Ultracomputer remote kernel debug a29k-nyu-kern - - * New remote interfaces - -AMD 29000 Adapt -AMD 29000 Minimon - - -*** Changes in GDB-4.0: - - * New Facilities - -Wide output is wrapped at good places to make the output more readable. - -Gdb now supports cross-debugging from a host machine of one type to a -target machine of another type. Communication with the target system -is over serial lines. The ``target'' command handles connecting to the -remote system; the ``load'' command will download a program into the -remote system. Serial stubs for the m68k and i386 are provided. Gdb -also supports debugging of realtime processes running under VxWorks, -using SunRPC Remote Procedure Calls over TCP/IP to talk to a debugger -stub on the target system. - -New CPUs supported include the AMD 29000 and Intel 960. - -GDB now reads object files and symbol tables via a ``binary file'' -library, which allows a single copy of GDB to debug programs of multiple -object file types such as a.out and coff. - -There is now a GDB reference card in "doc/refcard.tex". (Make targets -refcard.dvi and refcard.ps are available to format it). - - - * Control-Variable user interface simplified - -All variables that control the operation of the debugger can be set -by the ``set'' command, and displayed by the ``show'' command. - -For example, ``set prompt new-gdb=>'' will change your prompt to new-gdb=>. -``Show prompt'' produces the response: -Gdb's prompt is new-gdb=>. - -What follows are the NEW set commands. The command ``help set'' will -print a complete list of old and new set commands. ``help set FOO'' -will give a longer description of the variable FOO. ``show'' will show -all of the variable descriptions and their current settings. - -confirm on/off: Enables warning questions for operations that are - hard to recover from, e.g. rerunning the program while - it is already running. Default is ON. - -editing on/off: Enables EMACS style command line editing - of input. Previous lines can be recalled with - control-P, the current line can be edited with control-B, - you can search for commands with control-R, etc. - Default is ON. - -history filename NAME: NAME is where the gdb command history - will be stored. The default is .gdb_history, - or the value of the environment variable - GDBHISTFILE. - -history size N: The size, in commands, of the command history. The - default is 256, or the value of the environment variable - HISTSIZE. - -history save on/off: If this value is set to ON, the history file will - be saved after exiting gdb. If set to OFF, the - file will not be saved. The default is OFF. - -history expansion on/off: If this value is set to ON, then csh-like - history expansion will be performed on - command line input. The default is OFF. - -radix N: Sets the default radix for input and output. It can be set - to 8, 10, or 16. Note that the argument to "radix" is interpreted - in the current radix, so "set radix 10" is always a no-op. - -height N: This integer value is the number of lines on a page. Default - is 24, the current `stty rows'' setting, or the ``li#'' - setting from the termcap entry matching the environment - variable TERM. - -width N: This integer value is the number of characters on a line. - Default is 80, the current `stty cols'' setting, or the ``co#'' - setting from the termcap entry matching the environment - variable TERM. - -Note: ``set screensize'' is obsolete. Use ``set height'' and -``set width'' instead. - -print address on/off: Print memory addresses in various command displays, - such as stack traces and structure values. Gdb looks - more ``symbolic'' if you turn this off; it looks more - ``machine level'' with it on. Default is ON. - -print array on/off: Prettyprint arrays. New convenient format! Default - is OFF. - -print demangle on/off: Print C++ symbols in "source" form if on, - "raw" form if off. - -print asm-demangle on/off: Same, for assembler level printouts - like instructions. - -print vtbl on/off: Prettyprint C++ virtual function tables. Default is OFF. - - - * Support for Epoch Environment. - -The epoch environment is a version of Emacs v18 with windowing. One -new command, ``inspect'', is identical to ``print'', except that if you -are running in the epoch environment, the value is printed in its own -window. - - - * Support for Shared Libraries - -GDB can now debug programs and core files that use SunOS shared libraries. -Symbols from a shared library cannot be referenced -before the shared library has been linked with the program (this -happens after you type ``run'' and before the function main() is entered). -At any time after this linking (including when examining core files -from dynamically linked programs), gdb reads the symbols from each -shared library when you type the ``sharedlibrary'' command. -It can be abbreviated ``share''. - -sharedlibrary REGEXP: Load shared object library symbols for files - matching a unix regular expression. No argument - indicates to load symbols for all shared libraries. - -info sharedlibrary: Status of loaded shared libraries. - - - * Watchpoints - -A watchpoint stops execution of a program whenever the value of an -expression changes. Checking for this slows down execution -tremendously whenever you are in the scope of the expression, but is -quite useful for catching tough ``bit-spreader'' or pointer misuse -problems. Some machines such as the 386 have hardware for doing this -more quickly, and future versions of gdb will use this hardware. - -watch EXP: Set a watchpoint (breakpoint) for an expression. - -info watchpoints: Information about your watchpoints. - -delete N: Deletes watchpoint number N (same as breakpoints). -disable N: Temporarily turns off watchpoint number N (same as breakpoints). -enable N: Re-enables watchpoint number N (same as breakpoints). - - - * C++ multiple inheritance - -When used with a GCC version 2 compiler, GDB supports multiple inheritance -for C++ programs. - - * C++ exception handling - -Gdb now supports limited C++ exception handling. Besides the existing -ability to breakpoint on an exception handler, gdb can breakpoint on -the raising of an exception (before the stack is peeled back to the -handler's context). - -catch FOO: If there is a FOO exception handler in the dynamic scope, - set a breakpoint to catch exceptions which may be raised there. - Multiple exceptions (``catch foo bar baz'') may be caught. - -info catch: Lists all exceptions which may be caught in the - current stack frame. - - - * Minor command changes - -The command ``call func (arg, arg, ...)'' now acts like the print -command, except it does not print or save a value if the function's result -is void. This is similar to dbx usage. - -The ``up'' and ``down'' commands now always print the frame they end up -at; ``up-silently'' and `down-silently'' can be used in scripts to change -frames without printing. - - * New directory command - -'dir' now adds directories to the FRONT of the source search path. -The path starts off empty. Source files that contain debug information -about the directory in which they were compiled can be found even -with an empty path; Sun CC and GCC include this information. If GDB can't -find your source file in the current directory, type "dir .". - - * Configuring GDB for compilation - -For normal use, type ``./configure host''. See README or gdb.texinfo -for more details. - -GDB now handles cross debugging. If you are remotely debugging between -two different machines, type ``./configure host -target=targ''. -Host is the machine where GDB will run; targ is the machine -where the program that you are debugging will run. |