From 5b8b6385beadddaa5786abe2061100bf5a58a417 Mon Sep 17 00:00:00 2001 From: Jan Kratochvil Date: Sat, 6 Apr 2013 08:58:53 +0000 Subject: [PATCH] gdb/doc/ * gdb.texinfo (gdbserver man): Rename tty to comm. Swap --attach parameters order. Remove "On some targets" for --attach. Document the --multi parameter and extended-remote command. Document all the options. --- gdb/doc/ChangeLog | 8 +++ gdb/doc/gdb.texinfo | 147 +++++++++++++++++++++++++++++++++++++++++--- 2 files changed, 147 insertions(+), 8 deletions(-) diff --git a/gdb/doc/ChangeLog b/gdb/doc/ChangeLog index 49aefa3f61..9a6210b83b 100644 --- a/gdb/doc/ChangeLog +++ b/gdb/doc/ChangeLog @@ -1,3 +1,11 @@ +2013-04-06 Jan Kratochvil + Eli Zaretskii + + * gdb.texinfo (gdbserver man): Rename tty to comm. Swap --attach + parameters order. Remove "On some targets" for --attach. Document the + --multi parameter and extended-remote command. Document all the + options. + 2013-04-05 Jan Kratochvil * gdb.texinfo (gdb man): Mention option -p. Include Fortran to diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo index 08c708b4eb..bf7e25eabb 100644 --- a/gdb/doc/gdb.texinfo +++ b/gdb/doc/gdb.texinfo @@ -41867,9 +41867,11 @@ Richard M. Stallman and Roland H. Pesch, July 1991. @c man title gdbserver Remote Server for the GNU Debugger @format @c man begin SYNOPSIS gdbserver -gdbserver @var{tty} @var{prog} [@var{args}@dots{}] +gdbserver @var{comm} @var{prog} [@var{args}@dots{}] -gdbserver @var{tty} --attach @var{PID} +gdbserver --attach @var{comm} @var{pid} + +gdbserver --multi @var{comm} @c man end @end format @@ -41929,16 +41931,25 @@ ports on the target system. This same port number must be used in the host you chose a port number that conflicts with another service, @command{gdbserver} will print an error message and exit. -On some targets, @command{gdbserver} can also attach to running programs. +@command{gdbserver} can also attach to running programs. This is accomplished via the @option{--attach} argument. The syntax is: @smallexample -target> gdbserver @var{comm} --attach @var{pid} +target> gdbserver --attach @var{comm} @var{pid} @end smallexample @var{pid} is the process ID of a currently running process. It isn't necessary to point @command{gdbserver} at a binary for the running process. +To start @code{gdbserver} without supplying an initial command to run +or process ID to attach, use the @option{--multi} command line option. +In such case you should connect using @kbd{target extended-remote} to start +the program you want to debug. + +@smallexample +target> gdbserver --multi @var{comm} +@end smallexample + @ifclear man @subheading Usage (host side) @end ifclear @@ -41951,7 +41962,8 @@ You need an unstripped copy of the target program on your host system, since would, with the target program as the first argument. (You may need to use the @option{--baud} option if the serial line is running at anything except 9600 baud.) That is @code{gdb TARGET-PROG}, or @code{gdb --baud BAUD TARGET-PROG}. After that, the only -new command you need to know about is @code{target remote}. It's argument is either +new command you need to know about is @code{target remote} +(or @code{target extended-remote}). Its argument is either a device name (usually a serial device, like @file{/dev/ttyb}), or a @code{HOST:PORT} descriptor. For example: @@ -41978,12 +41990,131 @@ you previously started up @command{gdbserver} with the same port number. Note t TCP connections, you must start up @command{gdbserver} prior to using the `target remote' command, otherwise you may get an error that looks something like `Connection refused'. + +@command{gdbserver} can also debug multiple inferiors at once, +described in +@ifset man +the @value{GDBN} manual in node @code{Inferiors and Programs} +-- shell command @code{info -f gdb -n 'Inferiors and Programs'}. +@end ifset +@ifclear man +@ref{Inferiors and Programs}. +@end ifclear +In such case use the @code{extended-remote} @value{GDBN} command variant: + +@smallexample +(gdb) target extended-remote the-target:2345 +@end smallexample + +The @command{gdbserver} option @option{--multi} may or may not be used in such +case. @c man end @c man begin OPTIONS gdbserver -You have to supply the name of the program to debug -and the tty to communicate on; the remote @value{GDBN} will do everything else. -Any remaining arguments will be passed to the program verbatim. +There are three different modes for invoking @command{gdbserver}: + +@itemize @bullet + +@item +Debug a specific program specified by its program name: + +@smallexample +gdbserver @var{comm} @var{prog} [@var{args}@dots{}] +@end smallexample + +The @var{comm} parameter specifies how should the server communicate +with @value{GDBN}; it is either a device name (to use a serial line), +a TCP port number (@code{:1234}), or @code{-} or @code{stdio} to use +stdin/stdout of @code{gdbserver}. Specify the name of the program to +debug in @var{prog}. Any remaining arguments will be passed to the +program verbatim. When the program exits, @value{GDBN} will close the +connection, and @code{gdbserver} will exit. + +@item +Debug a specific program by specifying the process ID of a running +program: + +@smallexample +gdbserver --attach @var{comm} @var{pid} +@end smallexample + +The @var{comm} parameter is as described above. Supply the process ID +of a running program in @var{pid}; @value{GDBN} will do everything +else. Like with the previous mode, when the process @var{pid} exits, +@value{GDBN} will close the connection, and @code{gdbserver} will exit. + +@item +Multi-process mode -- debug more than one program/process: + +@smallexample +gdbserver --multi @var{comm} +@end smallexample + +In this mode, @value{GDBN} can instruct @command{gdbserver} which +command(s) to run. Unlike the other 2 modes, @value{GDBN} will not +close the connection when a process being debugged exits, so you can +debug several processes in the same session. +@end itemize + +In each of the modes you may specify these options: + +@table @env + +@item --help +List all options, with brief explanations. + +@item --version +This option causes @command{gdbserver} to print its version number and exit. + +@item --attach +@command{gdbserver} will attach to a running program. The syntax is: + +@smallexample +target> gdbserver --attach @var{comm} @var{pid} +@end smallexample + +@var{pid} is the process ID of a currently running process. It isn't +necessary to point @command{gdbserver} at a binary for the running process. + +@item --multi +To start @code{gdbserver} without supplying an initial command to run +or process ID to attach, use this command line option. +Then you can connect using @kbd{target extended-remote} and start +the program you want to debug. The syntax is: + +@smallexample +target> gdbserver --multi @var{comm} +@end smallexample + +@item --debug +Instruct @code{gdbserver} to display extra status information about the debugging +process. +This option is intended for @code{gdbserver} development and for bug reports to +the developers. + +@item --remote-debug +Instruct @code{gdbserver} to display remote protocol debug output. +This option is intended for @code{gdbserver} development and for bug reports to +the developers. + +@item --wrapper +Specify a wrapper to launch programs +for debugging. The option should be followed by the name of the +wrapper, then any command-line arguments to pass to the wrapper, then +@kbd{--} indicating the end of the wrapper arguments. + +@item --once +By default, @command{gdbserver} keeps the listening TCP port open, so that +additional connections are possible. However, if you start @code{gdbserver} +with the @option{--once} option, it will stop listening for any further +connection attempts after connecting to the first @value{GDBN} session. + +@c --disable-packet is not documented for users. + +@c --disable-randomization and --no-disable-randomization are superseded by +@c QDisableRandomization. + +@end table @c man end @c man begin SEEALSO gdbserver -- 2.34.1