[PATCH v3 4/4] Extended-remote exec event docs

Don Breazeal
2015-09-09T23:06:42Z

This patch is an update to extended-remote exec event documentation.
The only change from the previous version is to document the
'set/show remote exec-event-feature-packet' commands in the NEWS
file.

-----

This patch adds documentation of support for exec events on
extended-remote Linux targets.

Thanks,
--Don

gdb/
2015-09-09 Don Breazeal <donb@codesourcery.com>

* NEWS: Announce new remote packets for the exec-events
feature and the exec-events feature and associated commands.

gdb/doc/
2015-09-09 Don Breazeal <donb@codesourcery.com>

* gdb.texinfo (Remote Configuration): Add exec event
feature to table of packet settings.
(Stop Reply Packets): Add exec events to the list of stop
reasons.
(General Query Packets): Add exec events to tables of
'gdbfeatures' and 'stub features' supported in the qSupported
packet, as well as to the list containing stub feature
details.

---
gdb/NEWS | 21 +++++++++++++++++++++
gdb/doc/gdb.texinfo | 30 ++++++++++++++++++++++++++++++
2 files changed, 51 insertions(+)

diff --git a/gdb/NEWS b/gdb/NEWS
index 0cf51e1..bb1c8d9 100644
--- a/gdb/NEWS
+++ b/gdb/NEWS
@@ -55,6 +55,27 @@ show remote multiprocess-extensions-packet
* Support for reading/writing memory and extracting values on architectures
whose memory is addressable in units of any integral multiple of 8 bits.

+* New remote packets
+
+exec stop reason
+ Indicates that an exec system call was executed.
+
+exec-events feature in qSupported
+ The qSupported packet allows GDB to request support for exec
+ events using the new 'gdbfeature' exec-event, and the qSupported
+ response can contain the corresponding 'stubfeature'. Set and
+ show commands can be used to display whether these features are enabled.
+
+* Extended-remote exec events
+
+ ** GDB now has support for exec events on extended-remote Linux targets.
+ For such targets with Linux kernels 2.5.46 and later, this enables
+ follow-exec-mode and exec catchpoints.
+
+set remote exec-event-feature-packet
+show remote exec-event-feature-packet
+ Set/show the use of the remote exec event feature.
+
*** Changes in GDB 7.10

* Support for process record-replay and reverse debugging on aarch64*-linux*
diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index cd0abad..395f0d4 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -20225,6 +20225,10 @@ are:
@tab @code{vfork stop reason}
@tab @code{vfork}

+@item @code{exec-event-feature}
+@tab @code{exec stop reason}
+@tab @code{exec}
+
@end multitable

@node Remote Stub
@@ -35506,6 +35510,18 @@ appropriate @samp{qSupported} feature (@pxref{qSupported}). The
remote stub must also supply the appropriate @samp{qSupported} feature
indicating support.

+@cindex exec events, remote reply
+@item exec
+The packet indicates that @code{execve} was called, and @var{r}
+is the absolute pathname of the file that was executed, in hex.
+This packet is only applicable to targets that support exec events.
+
+This packet should not be sent by default; older @value{GDBN} versions
+did not support it. @value{GDBN} requests it, by supplying an
+appropriate @samp{qSupported} feature (@pxref{qSupported}). The
+remote stub must also supply the appropriate @samp{qSupported} feature
+indicating support.
+
@end table

@item W @var{AA}
@@ -36110,6 +36126,12 @@ This feature indicates whether @value{GDBN} supports vfork event
extensions to the remote protocol. @value{GDBN} does not use such
extensions unless the stub also reports that it supports them by
including @samp{vfork-events+} in its @samp{qSupported} reply.
+
+@item exec-events
+This feature indicates whether @value{GDBN} supports exec event
+extensions to the remote protocol. @value{GDBN} does not use such
+extensions unless the stub also reports that it supports them by
+including @samp{exec-events+} in its @samp{qSupported} reply.
@end table

Stubs should ignore any unknown values for
@@ -36373,6 +36395,11 @@ These are the currently defined stub features and their properties:
@tab @samp{-}
@tab No

+@item @samp{exec-events}
+@tab No
+@tab @samp{-}
+@tab No
+
@end multitable

These are the currently defined stub features, in more detail:
@@ -36578,6 +36605,9 @@ The remote stub reports the @samp{fork} stop reason for fork events.
The remote stub reports the @samp{vfork} stop reason for vfork events
and vforkdone events.

+@item exec-events
+The remote stub reports the @samp{exec} stop reason for exec events.
+
@end table

@item qSymbol::
--
1.8.1.1