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-_dnl__ -*- Texinfo -*-
-_dnl__ Copyright (c) 1988 1989 1990 1991 Free Software Foundation, Inc.
-_dnl__ This file is part of the source for the GDB manual.
-@c M4 FRAGMENT: $Id$
-@node Targets, Controlling _GDBN__, _GDBN__ Files, Top
-@chapter Specifying a Debugging Target
-@cindex debugging target
-@kindex target
-A @dfn{target} is an interface between the debugger and a particular
-kind of file or process.
-
-Often, you will be able to run _GDBN__ in the same host environment as the
-program you are debugging; in that case, the debugging target can just be
-specified as a side effect of the @code{file} or @code{core} commands.
-When you need more flexibility---for example, running _GDBN__ on a
-physically separate host, controlling standalone systems over a
-serial port, or realtime systems over a TCP/IP connection---you can use
-the @code{target} command.
-
-@menu
-* Active Targets:: Active Targets
-* Target Commands:: Commands for Managing Targets
-* Remote:: Remote Debugging
-@end menu
-
-@node Active Targets, Target Commands, Targets, Targets
-@section Active Targets
-@cindex stacking targets
-@cindex active targets
-@cindex multiple targets
-
-Targets are managed in three @dfn{strata} that correspond to different
-classes of target: processes, core files, and executable files. This
-allows you to (for example) start a process and inspect its activity
-without abandoning your work on a core file.
-
-More than one target can potentially respond to a request. In
-particular, when you access memory _GDBN__ will examine the three strata of
-targets until it finds a target that can handle that particular address.
-Strata are always examined in a fixed order: first a process if there is
-one, then a core file if there is one, and finally an executable file if
-there is one of those.
-
-When you specify a new target in a given stratum, it replaces any target
-previously in that stratum.
-
-To get rid of a target without replacing it, use the @code{detach}
-command. The related command @code{attach} provides you with a way of
-choosing a particular running process as a new target. @xref{Attach}.
-
-@node Target Commands, Remote, Active Targets, Targets
-@section Commands for Managing Targets
-
-@table @code
-@item target @var{type} @var{parameters}
-Connects the _GDBN__ host environment to a target machine or process. A
-target is typically a protocol for talking to debugging facilities. You
-use the argument @var{type} to specify the type or protocol of the
-target machine.
-
-Further @var{parameters} are interpreted by the target protocol, but
-typically include things like device names or host names to connect
-with, process numbers, and baud rates.
-
-The @code{target} command will not repeat if you press @key{RET} again
-after executing the command.
-
-@item help target
-@kindex help target
-Displays the names of all targets available. To display targets
-currently selected, use either @code{info target} or @code{info files}
-(@pxref{Files}).
-
-@item help target @var{name}
-Describe a particular target, including any parameters necessary to
-select it.
-@end table
-
-Here are some common targets (available, or not, depending on the _GDBN__
-configuration):
-
-@table @code
-@item target exec @var{prog}
-@kindex target exec
-An executable file. @samp{target exec @var{prog}} is the same as
-@samp{exec-file @var{prog}}.
-
-@item target core @var{filename}
-@kindex target core
-A core dump file. @samp{target core @var{filename}} is the same as
-@samp{core-file @var{filename}}.
-
-@item target remote @var{dev}
-@kindex target remote
-Remote serial target in _GDBN__-specific protocol. The argument @var{dev}
-specifies what serial device to use for the connection (e.g.
-@file{/dev/ttya}). @xref{Remote}.
-
-_if__(_AMD29K__)
-@item target amd-eb @var{dev} @var{speed} @var{PROG}
-@kindex target amd-eb
-@cindex AMD EB29K
-Remote PC-resident AMD EB29K board, attached over serial lines.
-@var{dev} is the serial device, as for @code{target remote};
-@var{speed} allows you to specify the linespeed; and @var{PROG} is the
-name of the program to be debugged, as it appears to DOS on the PC.
-@xref{EB29K Remote}.
-
-_fi__(_AMD29K__)
-_if__(_I960__)
-@item target nindy @var{devicename}
-@kindex target nindy
-An Intel 960 board controlled by a Nindy Monitor. @var{devicename} is
-the name of the serial device to use for the connection, e.g.
-@file{/dev/ttya}. @xref{i960-Nindy Remote}.
-
-_fi__(_I960__)
-_if__(_VXWORKS__)
-@item target vxworks @var{machinename}
-@kindex target vxworks
-A VxWorks system, attached via TCP/IP. The argument @var{machinename}
-is the target system's machine name or IP address.
-@xref{VxWorks Remote}.
-_fi__(_VXWORKS__)
-@end table
-
-_if__(_GENERIC__)
-Different targets are available on different configurations of _GDBN__; your
-configuration may have more or fewer targets.
-_fi__(_GENERIC__)
-
-@node Remote, , Target Commands, Targets
-@section Remote Debugging
-@cindex remote debugging
-
-_if__(_GENERIC__)
-@menu
-_include__(gdb.inv.m-m4)<>_dnl__
-@end menu
-_fi__(_GENERIC__)
-
-If you are trying to debug a program running on a machine that can't run
-_GDBN__ in the usual way, it is often useful to use remote debugging. For
-example, you might use remote debugging on an operating system kernel, or on
-a small system which does not have a general purpose operating system
-powerful enough to run a full-featured debugger.
-
-Some configurations of _GDBN__ have special serial or TCP/IP interfaces
-to make this work with particular debugging targets. In addition,
-_GDBN__ comes with a generic serial protocol (specific to _GDBN__, but
-not specific to any particular target system) which you can use if you
-write the remote stubs---the code that will run on the remote system to
-communicate with _GDBN__.
-
-To use the _GDBN__ remote serial protocol, the program to be debugged on
-the remote machine needs to contain a debugging stub which talks to
-_GDBN__ over the serial line. Several working remote stubs are
-distributed with _GDBN__; see the @file{README} file in the _GDBN__
-distribution for more information.
-
-For details of this communication protocol, see the comments in the
-_GDBN__ source file @file{remote.c}.
-
-To start remote debugging, first run _GDBN__ and specify as an executable file
-the program that is running in the remote machine. This tells _GDBN__ how
-to find the program's symbols and the contents of its pure text. Then
-establish communication using the @code{target remote} command with a device
-name as an argument. For example:
-
-@example
-target remote /dev/ttyb
-@end example
-
-@noindent
-if the serial line is connected to the device named @file{/dev/ttyb}. This
-will stop the remote machine if it is not already stopped.
-
-Now you can use all the usual commands to examine and change data and to
-step and continue the remote program.
-
-To resume the remote program and stop debugging it, use the @code{detach}
-command.
-
-Other remote targets may be available in your
-configuration of _GDBN__; use @code{help targets} to list them.
-
-_if__(_GENERIC__)
-_include__(gdb.inv.s-m4)
-@c Text on starting up GDB in various specific cases; it goes up front
-@c in manuals configured for any of those particular situations, here
-@c otherwise.
-_fi__(_GENERIC__)