Added VxWorks subsection to chapter on getting in/out
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Roland Pesch
parent
01b25dab88
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d008dd076c
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@ -16,6 +16,10 @@ before either tex- or info- formatting: for example,
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will produce (assuming your path finds either GNU or SysV m4; Berkeley
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won't do) a file suitable for formatting. See the text in "pretex.m4"
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for a fuller explanation (and the macro definitions).
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To permit maximum flexibility, the full source also does not contain
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any "info" markup that can be generated automatically; you should first
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preprocess it as above, then run it through C-u texinfo-master-menu,
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before actually info-formatting it.
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_1__
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_fi__(0)
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@c
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@ -470,7 +474,7 @@ Add @var{directory} to the path to search for source files.
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@table @code
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@item -nx
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Do not execute commands from the init files @file{._GDBP__init}.
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Do not execute commands from the init files @file{_GDBINIT__}.
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Normally, the commands in these files are executed after all the
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command options and arguments have been processed. @xref{Command
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Files}.
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@ -482,7 +486,7 @@ specified on the _GDBN__ command line.
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@item -batch
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Run in batch mode. Exit with code @code{0} after processing all the command
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files specified with @samp{-x} (and @file{._GDBP__init}, if not inhibited).
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files specified with @samp{-x} (and @file{_GDBINIT__}, if not inhibited).
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Exit with nonzero status if an error occurs in executing the _GDBN__
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commands in the command files.
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@ -759,6 +763,126 @@ another window often helps to debug trouble with @code{EBMON}, or
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unexpected events on the PC side of the connection.
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_fi__(_AMD29K__)
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_if__(_VXWORKS__)
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@node VxWorks Remote,,,
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@subsection _GDBN__ and VxWorks
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_GDBN__ enables developers to spawn and debug tasks running on networked
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VxWorks targets from a Unix host. Already-running tasks spawned from
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the VxWorks shell can also be debugged. _GDBN__ uses code that runs on
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both the UNIX host and on the VxWorks target. The program
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@code{_GDBP__} is installed and executed on the UNIX host.
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The remote debugging interface (RDB) routines are installed and executed
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on the VxWorks target. These routines are included in the VxWorks library
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@code{rdb.a} and are incorporated into the system image when source-level
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debugging is enabled in the VxWorks configuration.
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Defining @code{INCLUDE_RDB} in the VxWorks configuration file
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@code{configAll.h} includes the RDB interface routines and spawns the
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source debugging task @code{tRdbTask} when VxWorks is booted. For more
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information on configuring and remaking VxWorks, @cite{VxWorks
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Programmer's Guide}.
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Once you have included the RDB interface in your VxWorks system image
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and set your Unix execution search path to find _GDBN__, you are ready
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to run _GDBN__. From your UNIX host, type:
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@smallexample
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% _GDBP__
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@end smallexample
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_GDBN__ will come up showing the prompt:
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@smallexample
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(_GDBP__)
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@end smallexample
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@node VxWorks connection,,,
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@subsubsection Connecting to a VxWorks Target
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The _GDBN__ command @samp{target} lets you connect to a VxWorks target on the
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network. To connect to a target whose host name is ``@code{tt}'', type:
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@smallexample
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(_GDBP__) target vxworks tt
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@end smallexample
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_GDBN__ will display a message similar to the following:
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@smallexample
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Attaching remote machine across net... Success!
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@end smallexample
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_GDBN__ will then attempt to read the symbol tables of any object
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modules loaded into the VxWorks target since it was last booted.
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_GDBN__ will locate the object files by searching the directories listed
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in the source path (@pxref{Source Path}); if it fails to find an object
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file, it will display a message such as:
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@smallexample
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prog.o: No such file or directory.
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@end smallexample
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This will cause the @samp{target} command to abort. When this happens, you
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should add the appropriate directory to the source path and execute the
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@samp{target} command again.
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@node VxWorks download,,,
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@subsubsection Downloading to a VxWorks Target
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If you have connected to the VxWorks target and you want to debug an
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object that has not yet been loaded, you can use the _GDBN__ @samp{load}
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command to download a file from UNIX to VxWorks incrementally. The
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object file given as an argument to the @samp{load} command is actually
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opened twice: first by the VxWorks target in order to download the code,
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then by _GDBN__ in order to read the symbol table. This can lead to
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problems if the current working directories on the two systems differ.
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It is simplest to set the working directory on both systems to the
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directory in which the object file resides, and then to reference the
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file by its name, without any path. Thus, to load a program
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@samp{prog.o}, residing in @code{wherever/vw/demo/rdb}, on VxWorks type:
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@smallexample
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-> cd "wherever/vw/demo/rdb"
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@end smallexample
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On _GDBN__ type:
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@smallexample
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(_GDBP__) cd wherever/vw/demo/rdb
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(_GDBP__) load prog.o
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@end smallexample
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_GDBN__ will display a response similar to the following:
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@smallexample
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Reading symbol data from wherever/vw/demo/rdb/prog.o... done.
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@end smallexample
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You can also use the @samp{load} command to reload an object module
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after editing and recompiling the corresponding source file. Note that
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this will cause _GDBN__ to delete all currently-defined breakpoints,
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auto-displays, and convenience variables, and to clear the value
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history. (This is necessary in order to preserve the integrity of
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debugger data structures that reference the target system's symbol
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table.)
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@node VxWorks attach,,,
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@subsubsection Running Tasks
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You can also attach to an existing task using the attach command as
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follows:
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@smallexample
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(_GDBP__) attach @var{taskId}
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@end smallexample
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where @var{taskId} is the VxWorks hexadecimal task ID. The task can be running
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or suspended when you attach to it. If running, it will be suspended at
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the time of attachment.
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_fi__(_VXWORKS__)
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@node Stopping _GDBN__,,,
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@section Stopping _GDBN__
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@cindex exiting _GDBN__
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@ -4355,9 +4479,9 @@ command file does nothing; it does not mean to repeat the last command, as
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it would from the terminal.
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@cindex init file
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@cindex @file{._GDBP__init}
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@cindex @file{_GDBINIT__}
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When you start _GDBN__, it first executes commands from its @dfn{init files}.
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These are files named @file{._GDBP__init}. _GDBN__ reads the init file (if any)
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These are files named @file{_GDBINIT__}. _GDBN__ reads the init file (if any)
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in your home directory and then the init file (if any) in the current
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working directory. (The init files are not executed if the @samp{-nx}
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option is given.) You can also request the execution of a command file
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