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aarch64: Correct target state for hardware step

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When using hardware step for doing stepping, the existing DSCR records
the event as external debug request.  This will generate a SIGINT event
to GDB and causes it to stop the stepping process.
For aarch64, read DESR to check if the event is a hardware step and set
state to DBG_REASON_SINGLESTEP.
With this patch, GDB can now do source level stepping.

Change-Id: I1d06f819578c74b3ac17376c67f882adddea1f52
Signed-off-by: David Ung <david.ung.42@gmail.com>
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
This commit is contained in:
David Ung
2015-04-20 13:14:43 -07:00
committed by Matthias Welwarsky
parent a12c15e21f
commit 6b554b3b0e
2 changed files with 12 additions and 2 deletions
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1
src/target/armv8.h
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@@ -161,6 +161,7 @@ target_to_armv8(struct target *target)
/* register offsets from armv8.debug_base */
#define CPUDBG_WFAR 0x018
#define CPUDBG_DESR 0x020
#define CPUDBG_DECR 0x024
/* PCSR at 0x084 -or- 0x0a0 -or- both ... based on flags in DIDR */
#define CPUDBG_DSCR 0x088