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Diffstat (limited to 'gdb/doc/gdb.texinfo')
| -rw-r--r-- | gdb/doc/gdb.texinfo | 241 |
1 files changed, 240 insertions, 1 deletions
diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo index af34740d686..35cc0573c8b 100644 --- a/gdb/doc/gdb.texinfo +++ b/gdb/doc/gdb.texinfo @@ -2480,7 +2480,7 @@ the child process just like any other process which you attached to. On some systems, @value{GDBN} provides support for debugging programs that create additional processes using the @code{fork} or @code{vfork} functions. Currently, the only platforms with this feature are HP-UX (11.x and later -only?) and GNU/Linux (kernel version 2.5.60 and later). +only?) and @sc{gnu}/Linux (kernel version 2.5.60 and later). By default, when a program forks, @value{GDBN} will continue to debug the parent process and the child process will run unimpeded. @@ -12670,6 +12670,7 @@ configuration of @value{GDBN}; use @code{help target} to list them. @menu * Connecting:: Connecting to a remote target +* File Transfer:: Sending files to a remote system * Server:: Using the gdbserver program * Remote Configuration:: Remote configuration * Remote Stub:: Implementing a remote stub @@ -12817,6 +12818,38 @@ can add new commands that only the external monitor will understand and implement. @end table +@node File Transfer +@section Sending files to a remote system +@cindex remote target, file transfer +@cindex file transfer +@cindex sending files to remote systems + +Some remote targets offer the ability to transfer files over the same +connection used to communicate with @value{GDBN}. This is convenient +for targets accessible through other means, e.g.@: @sc{gnu}/Linux systems +running @code{gdbserver} over a network interface. For other targets, +e.g.@: embedded devices with only a single serial port, this may be +the only way to upload or download files. + +Not all remote targets support these commands. + +@table @code +@kindex remote put +@item remote put @var{hostfile} @var{targetfile} +Copy file @var{hostfile} from the host system (the machine running +@value{GDBN}) to @var{targetfile} on the target system. + +@kindex remote get +@item remote get @var{targetfile} @var{hostfile} +Copy file @var{targetfile} from the target system to @var{hostfile} +on the host system. + +@kindex remote delete +@item remote delete @var{targetfile} +Delete @var{targetfile} from the target system. + +@end table + @node Server @section Using the @code{gdbserver} Program @@ -13153,6 +13186,25 @@ are: @tab @code{QPassSignals} @tab @code{handle @var{signal}} +@item @code{hostio-close-packet} +@tab @code{vFile:close} +@tab @code{remote get}, @code{remote put} + +@item @code{hostio-open-packet} +@tab @code{vFile:open} +@tab @code{remote get}, @code{remote put} + +@item @code{hostio-pread-packet} +@tab @code{vFile:pread} +@tab @code{remote get}, @code{remote put} + +@item @code{hostio-pwrite-packet} +@tab @code{vFile:pwrite} +@tab @code{remote get}, @code{remote put} + +@item @code{hostio-unlink-packet} +@tab @code{vFile:unlink} +@tab @code{remote delete} @end multitable @node Remote Stub @@ -17349,6 +17401,7 @@ may repeat one or more times. * GDB/MI Signal Handling Commands:: @end ignore * GDB/MI Target Manipulation:: +* GDB/MI File Transfer Commands:: * GDB/MI Miscellaneous Commands:: @end menu @@ -21296,6 +21349,88 @@ The corresponding @value{GDBN} command is @samp{target}. @end smallexample @c %%%%%%%%%%%%%%%%%%%%%%%%%%%% SECTION %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +@node GDB/MI File Transfer Commands +@section @sc{gdb/mi} File Transfer Commands + + +@subheading The @code{-target-file-put} Command +@findex -target-file-put + +@subsubheading Synopsis + +@smallexample + -target-file-put @var{hostfile} @var{targetfile} +@end smallexample + +Copy file @var{hostfile} from the host system (the machine running +@value{GDBN}) to @var{targetfile} on the target system. + +@subsubheading @value{GDBN} Command + +The corresponding @value{GDBN} command is @samp{remote put}. + +@subsubheading Example + +@smallexample +(gdb) +-target-file-put localfile remotefile +^done +(gdb) +@end smallexample + + +@subheading The @code{-target-file-put} Command +@findex -target-file-get + +@subsubheading Synopsis + +@smallexample + -target-file-get @var{targetfile} @var{hostfile} +@end smallexample + +Copy file @var{targetfile} from the target system to @var{hostfile} +on the host system. + +@subsubheading @value{GDBN} Command + +The corresponding @value{GDBN} command is @samp{remote get}. + +@subsubheading Example + +@smallexample +(gdb) +-target-file-get remotefile localfile +^done +(gdb) +@end smallexample + + +@subheading The @code{-target-file-delete} Command +@findex -target-file-delete + +@subsubheading Synopsis + +@smallexample + -target-file-delete @var{targetfile} +@end smallexample + +Delete @var{targetfile} from the target system. + +@subsubheading @value{GDBN} Command + +The corresponding @value{GDBN} command is @samp{remote delete}. + +@subsubheading Example + +@smallexample +(gdb) +-target-file-delete remotefile +^done +(gdb) +@end smallexample + + +@c %%%%%%%%%%%%%%%%%%%%%%%%%%%% SECTION %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @node GDB/MI Miscellaneous Commands @section Miscellaneous @sc{gdb/mi} Commands @@ -22920,6 +23055,7 @@ Show the current setting of the target wait timeout. * General Query Packets:: * Register Packet Format:: * Tracepoint Packets:: +* Host I/O Packets:: * Interrupts:: * Examples:: * File-I/O Remote Protocol Extension:: @@ -23423,6 +23559,11 @@ command in the @samp{vCont} packet. The @samp{vCont} packet is not supported. @end table +@item vFile:@var{operation}:@var{parameter}@dots{} +@cindex @samp{vFile} packet +Perform a file operation on the target system. For details, +see @ref{Host I/O Packets}. + @item vFlashErase:@var{addr},@var{length} @cindex @samp{vFlashErase} packet Direct the stub to erase @var{length} bytes of flash starting at @@ -24572,6 +24713,104 @@ There is a trace experiment running. @end table +@node Host I/O Packets +@section Host I/O Packets +@cindex Host I/O, remote protocol +@cindex file transfer, remote protocol + +The @dfn{Host I/O} packets allow @value{GDBN} to perform I/O +operations on the far side of a remote link. For example, Host I/O is +used to upload and download files to a remote target with its own +filesystem. Host I/O uses the same constant values and data structure +layout as the target-initiated File-I/O protocol. However, the +Host I/O packets are structured differently. The target-initiated +protocol relies on target memory to store parameters and buffers. +Host I/O requests are initiated by @value{GDBN}, and the +target's memory is not involved. @xref{File-I/O Remote Protocol +Extension}, for more details on the target-initiated protocol. + +The Host I/O request packets all encode a single operation along with +its arguments. They have this format: + +@table @samp + +@item vFile:@var{operation}: @var{parameter}@dots{} +@var{operation} is the name of the particular request; the target +should compare the entire packet name up to the second colon when checking +for a supported operation. The format of @var{parameter} depends on +the operation. Numbers are always passed in hexadecimal. Negative +numbers have an explicit minus sign (i.e.@: two's complement is not +used). Strings (e.g.@: filenames) are encoded as a series of +hexadecimal bytes. The last argument to a system call may be a +buffer of escaped binary data (@pxref{Binary Data}). + +@end table + +The valid responses to Host I/O packets are: + +@table @samp + +@item F @var{result} [, @var{errno}] [; @var{attachment}] +@var{result} is the integer value returned by this operation, usually +non-negative for success and -1 for errors. If an error has occured, +@var{errno} will be included in the result. @var{errno} will have a +value defined by the File-I/O protocol (@pxref{Errno Values}). For +operations which return data, @var{attachment} supplies the data as a +binary buffer. Binary buffers in response packets are escaped in the +normal way (@pxref{Binary Data}). See the individual packet +documentation for the interpretation of @var{result} and +@var{attachment}. + +@item +An empty response indicates that this operation is not recognized. + +@end table + +These are the supported Host I/O operations: + +@table @samp +@item vFile:open: @var{pathname}, @var{flags}, @var{mode} +Open a file at @var{pathname} and return a file descriptor for it, or +return -1 if an error occurs. @var{pathname} is a string, +@var{flags} is an integer indicating a mask of open flags +(@pxref{Open Flags}), and @var{mode} is an integer indicating a mask +of mode bits to use if the file is created (@pxref{mode_t Values}). +@xref{open} for details of the open flags and mode values. + +@item vFile:close: @var{fd} +Close the open file corresponding to @var{fd} and return 0, or +-1 if an error occurs. + +@item vFile:pread: @var{fd}, @var{count}, @var{offset} +Read data from the open file corresponding to @var{fd}. Up to +@var{count} bytes will be read from the file, starting at @var{offset} +relative to the start of the file. The target may read fewer bytes; +common reasons include packet size limits and an end-of-file +condition. The number of bytes read is returned. Zero should only be +returned for a successful read at the end of the file, or if +@var{count} was zero. + +The data read should be returned as a binary attachment on success. +If zero bytes were read, the response should include an empty binary +attachment (i.e.@: a trailing semicolon). The return value is the +number of target bytes read; the binary attachment may be longer if +some characters were escaped. + +@item vFile:pwrite: @var{fd}, @var{offset}, @var{data} +Write @var{data} (a binary buffer) to the open file corresponding +to @var{fd}. Start the write at @var{offset} from the start of the +file. Unlike many @code{write} system calls, there is no +separate @var{count} argument; the length of @var{data} in the +packet is used. @samp{vFile:write} returns the number of bytes written, +which may be shorter than the length of @var{data}, or -1 if an +error occurred. + +@item vFile:unlink: @var{pathname} +Delete the file at @var{pathname} on the target. Return 0, +or -1 if an error occurs. @var{pathname} is a string. + +@end table + @node Interrupts @section Interrupts @cindex interrupts (remote protocol) |