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target: added events TARGET_EVENT_STEP_START and _END

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Events TARGET_EVENT_STEP_START and TARGET_EVENT_STEP_END
have been added - analogous to already existing events
TARGET_EVENT_RESUME_*.

This is an example of a concrete use case where having
these events is important:

In RISC-V processors without Debug Program Buffer, OpenOCD
cannot execute fence/fence.i when resuming or single-
stepping. With these events implemented, the user can
instead provide custom operations to achieve that same
effect prior to resuming the processor.

Change-Id: I786348ff08940759d99b0f24e9e0ed5a44581094
Signed-off-by: Jan Matyas <matyas@codasip.com>
Reviewed-on: http://openocd.zylin.com/5551
Tested-by: jenkins
Reviewed-by: Tim Newsome <tim@sifive.com>
This commit is contained in:
Jan Matyas
2020-04-01 11:58:20 +02:00
committed by Tomas Vanek
parent 0a804222da
commit 25efc15069
3 changed files with 20 additions and 2 deletions
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2
src/target/target.h
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@@ -258,6 +258,8 @@ enum target_event {
TARGET_EVENT_RESUMED, /* target resumed to normal execution */
TARGET_EVENT_RESUME_START,
TARGET_EVENT_RESUME_END,
TARGET_EVENT_STEP_START,
TARGET_EVENT_STEP_END,
TARGET_EVENT_GDB_START, /* debugger started execution (step/run) */
TARGET_EVENT_GDB_END, /* debugger stopped execution (step/run) */