428 lines
15 KiB
Plaintext
Executable File
428 lines
15 KiB
Plaintext
Executable File
_dnl__ -*- Texinfo -*-
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_dnl__ Copyright (c) 1990 1991 Free Software Foundation, Inc.
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_dnl__ This file is part of the source for the GDB manual.
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@c M4 FRAGMENT $Id$
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@c This text diverted to "Remote Debugging" section in general case;
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@c however, if we're doing a manual specifically for one of these, it
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@c belongs up front (in "Getting In and Out" chapter).
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_if__(_I960__)
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_if__(!_GENERIC__)
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@node i960-Nindy Remote, EB29K Remote, Mode Options, Starting _GDBN__
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_fi__(!_GENERIC__)
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_if__(_GENERIC__)
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@node i960-Nindy Remote, EB29K Remote, Remote, Remote
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_fi__(_GENERIC__)
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@subsection _GDBN__ with a Remote i960 (Nindy)
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@cindex Nindy
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@cindex i960
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@dfn{Nindy} is a ROM Monitor program for Intel 960 target systems. When
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_GDBN__ is configured to control a remote Intel 960 using Nindy, you can
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tell _GDBN__ how to connect to the 960 in several ways:
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@itemize @bullet
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@item
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Through command line options specifying serial port, version of the
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Nindy protocol, and communications speed;
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@item
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By responding to a prompt on startup;
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@item
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By using the @code{target} command at any point during your _GDBN__
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session. @xref{Target Commands}.
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@end itemize
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@menu
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* Nindy Startup:: Startup with Nindy
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* Nindy Options:: Options for Nindy
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* Nindy reset:: Nindy Reset Command
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@end menu
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@node Nindy Startup, Nindy Options, i960-Nindy Remote, i960-Nindy Remote
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@subsubsection Startup with Nindy
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If you simply start @code{_GDBN__} without using any command-line
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options, you are prompted for what serial port to use, @emph{before} you
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reach the ordinary _GDBN__ prompt:
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@example
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Attach /dev/ttyNN -- specify NN, or "quit" to quit:
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@end example
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@noindent
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Respond to the prompt with whatever suffix (after @samp{/dev/tty})
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identifies the serial port you want to use. You can, if you choose,
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simply start up with no Nindy connection by responding to the prompt
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with an empty line. If you do this, and later wish to attach to Nindy,
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use @code{target} (@pxref{Target Commands}).
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@node Nindy Options, Nindy reset, Nindy Startup, i960-Nindy Remote
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@subsubsection Options for Nindy
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These are the startup options for beginning your _GDBN__ session with a
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Nindy-960 board attached:
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@table @code
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@item -r @var{port}
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Specify the serial port name of a serial interface to be used to connect
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to the target system. This option is only available when _GDBN__ is
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configured for the Intel 960 target architecture. You may specify
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@var{port} as any of: a full pathname (e.g. @samp{-r /dev/ttya}), a
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device name in @file{/dev} (e.g. @samp{-r ttya}), or simply the unique
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suffix for a specific @code{tty} (e.g. @samp{-r a}).
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@item -O
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(An uppercase letter ``O'', not a zero.) Specify that _GDBN__ should use
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the ``old'' Nindy monitor protocol to connect to the target system.
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This option is only available when _GDBN__ is configured for the Intel 960
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target architecture.
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@quotation
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@emph{Warning:} if you specify @samp{-O}, but are actually trying to
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connect to a target system that expects the newer protocol, the connection
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will fail, appearing to be a speed mismatch. _GDBN__ will repeatedly
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attempt to reconnect at several different line speeds. You can abort
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this process with an interrupt.
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@end quotation
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@item -brk
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Specify that _GDBN__ should first send a @code{BREAK} signal to the target
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system, in an attempt to reset it, before connecting to a Nindy target.
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@quotation
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@emph{Warning:} Many target systems do not have the hardware that this
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requires; it only works with a few boards.
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@end quotation
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@end table
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The standard @samp{-b} option controls the line speed used on the serial
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port.
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@node Nindy reset, , Nindy Options, i960-Nindy Remote
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@c @group
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@subsubsection Nindy Reset Command
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@table @code
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@item reset
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@kindex reset
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For a Nindy target, this command sends a ``break'' to the remote target
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system; this is only useful if the target has been equipped with a
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circuit to perform a hard reset (or some other interesting action) when
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a break is detected.
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@end table
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@c @end group
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_fi__(_I960__)
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_if__(_AMD29K__)
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_if__(!_GENERIC__)
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@node EB29K Remote, VxWorks Remote, i960-Nindy Remote, Starting _GDBN__
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_fi__(!_GENERIC__)
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_if__(_GENERIC__)
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@node EB29K Remote, VxWorks Remote, i960-Nindy Remote, Remote
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_fi__(_GENERIC__)
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@subsection _GDBN__ with a Remote EB29K
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@cindex EB29K board
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@cindex running 29K programs
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To use _GDBN__ from a Unix system to run programs on AMD's EB29K
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board in a PC, you must first connect a serial cable between the PC
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and a serial port on the Unix system. In the following, we assume
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you've hooked the cable between the PC's @file{COM1} port and
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@file{/dev/ttya} on the Unix system.
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@menu
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* Comms (EB29K):: Communications Setup
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* _GDBP__-EB29K:: EB29K cross-debugging
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* Remote Log:: Remote Log
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@end menu
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@node Comms (EB29K), _GDBP__-EB29K, EB29K Remote, EB29K Remote
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@subsubsection Communications Setup
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The next step is to set up the PC's port, by doing something like the
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following in DOS on the PC:
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_0__@example
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C:\> MODE com1:9600,n,8,1,none
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_1__@end example
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@noindent
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This example---run on an MS DOS 4.0 system---sets the PC port to 9600
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bps, no parity, eight data bits, one stop bit, and no ``retry'' action;
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you must match the communications parameters when establishing the Unix
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end of the connection as well.
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@c FIXME: Who knows what this "no retry action" crud from the DOS manual may
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@c mean? It's optional; leave it out? ---pesch@cygnus.com, 25feb91
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To give control of the PC to the Unix side of the serial line, type
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the following at the DOS console:
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_0__@example
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C:\> CTTY com1
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_1__@end example
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@noindent
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(Later, if you wish to return control to the DOS console, you can use
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the command @code{CTTY con}---but you must send it over the device that
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had control, in our example over the @file{COM1} serial line).
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From the Unix host, use a communications program such as @code{tip} or
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@code{cu} to communicate with the PC; for example,
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@example
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cu -s 9600 -l /dev/ttya
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@end example
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@noindent
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The @code{cu} options shown specify, respectively, the linespeed and the
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serial port to use. If you use @code{tip} instead, your command line
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may look something like the following:
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@example
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tip -9600 /dev/ttya
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@end example
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@noindent
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Your system may define a different name where our example uses
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@file{/dev/ttya} as the argument to @code{tip}. The communications
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parameters, including what port to use, are associated with the
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@code{tip} argument in the ``remote'' descriptions file---normally the
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system table @file{/etc/remote}.
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@c FIXME: What if anything needs doing to match the "n,8,1,none" part of
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@c the DOS side's comms setup? cu can support -o (odd
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@c parity), -e (even parity)---apparently no settings for no parity or
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@c for character size. Taken from stty maybe...? John points out tip
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@c can set these as internal variables, eg ~s parity=none; man stty
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@c suggests that it *might* work to stty these options with stdin or
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@c stdout redirected... ---pesch@cygnus.com, 25feb91
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@kindex EBMON
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Using the @code{tip} or @code{cu} connection, change the DOS working
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directory to the directory containing a copy of your 29K program, then
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start the PC program @code{EBMON} (an EB29K control program supplied
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with your board by AMD). You should see an initial display from
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@code{EBMON} similar to the one that follows, ending with the
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@code{EBMON} prompt @samp{#}---
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_0__@example
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C:\> G:
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G:\> CD \usr\joe\work29k
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G:\USR\JOE\WORK29K> EBMON
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Am29000 PC Coprocessor Board Monitor, version 3.0-18
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Copyright 1990 Advanced Micro Devices, Inc.
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Written by Gibbons and Associates, Inc.
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Enter '?' or 'H' for help
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PC Coprocessor Type = EB29K
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I/O Base = 0x208
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Memory Base = 0xd0000
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Data Memory Size = 2048KB
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Available I-RAM Range = 0x8000 to 0x1fffff
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Available D-RAM Range = 0x80002000 to 0x801fffff
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PageSize = 0x400
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Register Stack Size = 0x800
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Memory Stack Size = 0x1800
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CPU PRL = 0x3
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Am29027 Available = No
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Byte Write Available = Yes
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# ~.
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_1__@end example
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Then exit the @code{cu} or @code{tip} program (done in the example by
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typing @code{~.} at the @code{EBMON} prompt). @code{EBMON} will keep
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running, ready for _GDBN__ to take over.
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For this example, we've assumed what is probably the most convenient
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way to make sure the same 29K program is on both the PC and the Unix
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system: a PC/NFS connection that establishes ``drive @code{G:}'' on the
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PC as a file system on the Unix host. If you don't have PC/NFS or
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something similar connecting the two systems, you must arrange some
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other way---perhaps floppy-disk transfer---of getting the 29K program
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from the Unix system to the PC; _GDBN__ will @emph{not} download it over the
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serial line.
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@node _GDBP__-EB29K, Remote Log, Comms (EB29K), EB29K Remote
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@subsubsection EB29K cross-debugging
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Finally, @code{cd} to the directory containing an image of your 29K
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program on the Unix system, and start _GDBN__---specifying as argument the
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name of your 29K program:
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@example
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cd /usr/joe/work29k
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_GDBP__ myfoo
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@end example
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Now you can use the @code{target} command:
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@example
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target amd-eb /dev/ttya 9600 MYFOO
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@end example
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@c FIXME: test above 'target amd-eb' as spelled, with caps! caps are meant to
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@c emphasize that this is the name as seen by DOS (since I think DOS is
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@c single-minded about case of letters). ---pesch@cygnus.com, 25feb91
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@noindent
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In this example, we've assumed your program is in a file called
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@file{myfoo}. Note that the filename given as the last argument to
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@code{target amd-eb} should be the name of the program as it appears to DOS.
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In our example this is simply @code{MYFOO}, but in general it can include
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a DOS path, and depending on your transfer mechanism may not resemble
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the name on the Unix side.
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At this point, you can set any breakpoints you wish; when you're ready
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to see your program run on the 29K board, use the _GDBN__ command
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@code{run}.
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To stop debugging the remote program, use the _GDBN__ @code{detach}
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command.
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To return control of the PC to its console, use @code{tip} or @code{cu}
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once again, after your _GDBN__ session has concluded, to attach to
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@code{EBMON}. You can then type the command @code{q} to shut down
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@code{EBMON}, returning control to the DOS command-line interpreter.
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Type @code{CTTY con} to return command input to the main DOS console,
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and type @kbd{~.} to leave @code{tip} or @code{cu}.
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@node Remote Log, , _GDBP__-EB29K, EB29K Remote
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@subsubsection Remote Log
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@kindex eb.log
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@cindex log file for EB29K
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The @code{target amd-eb} command creates a file @file{eb.log} in the
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current working directory, to help debug problems with the connection.
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@file{eb.log} records all the output from @code{EBMON}, including echoes
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of the commands sent to it. Running @samp{tail -f} on this file in
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another window often helps to understand 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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_if__(!_GENERIC__)
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@node VxWorks Remote, , EB29K Remote, Starting _GDBN__
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_fi__(!_GENERIC__)
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_if__(_GENERIC__)
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@node VxWorks Remote, , EB29K Remote, Remote
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_fi__(_GENERIC__)
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@subsection _GDBN__ and VxWorks
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@cindex 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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@file{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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@kindex INCLUDE_RDB
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You can define @code{INCLUDE_RDB} in the VxWorks configuration file
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@file{configAll.h} to include the RDB interface routines and spawn 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, see the @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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@menu
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* VxWorks connection:: Connecting to VxWorks
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* VxWorks download:: VxWorks Download
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* VxWorks attach:: Running Tasks
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@end menu
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@node VxWorks connection, VxWorks download, VxWorks Remote, VxWorks Remote
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@subsubsection Connecting to VxWorks
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The _GDBN__ command @code{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__ locates these files by searching the directories listed in the
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command search path (@pxref{Environment}); if it fails to find an
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object 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 @code{target} command to abort. When this happens,
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you should add the appropriate directory to the search path, with the
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_GDBN__ command @code{path}, and execute the @code{target} command
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again.
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@node VxWorks download, VxWorks attach, VxWorks connection, VxWorks Remote
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@subsubsection VxWorks Download
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@cindex download to VxWorks
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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__ @code{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 @code{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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@file{prog.o}, residing in @file{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 @code{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, , VxWorks download, VxWorks Remote
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@subsubsection Running Tasks
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@cindex running VxWorks tasks
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You can also attach to an existing task using the @code{attach} command as
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follows:
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@smallexample
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(_GDBP__) attach @var{task}
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@end smallexample
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where @var{task} 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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