[PATCH 1/2] sim: watch: fix pc watchpoints on little endian host systems

[Mike Frysinger <vapier@gentoo.org>]

My change 1ac72f0659d64d6a14da862242db0d841d2878d0 ("sim: convert to
bfd_endian") subtly broke the watchpoint module on little endian host
systems.  The old code used 0 to mean "whatever the host endian is",
and while that was changed to use BFD_ENDIAN_UNKNOWN, this caller was
missed.  Since its API used an int instead of an enum, the coercion
from 0 to the BFD endian enum was silently missed, and 0 happens to
be BFD_ENDIAN_BIG.

Instead of restoring the old logic by passing in BFD_ENDIAN_UNKNOWN,
we know the right host endian at compile time, so use that directly.
---
 sim/common/ChangeLog    | 9 +++++++++
 sim/common/sim-events.c | 4 ++--
 sim/common/sim-events.h | 4 ++--
 sim/common/sim-watch.c  | 2 +-
 4 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/sim/common/ChangeLog b/sim/common/ChangeLog
index 608a0859ce89..539bab687d46 100644
--- a/sim/common/ChangeLog
+++ b/sim/common/ChangeLog
@@ -1,3 +1,12 @@
+2021-01-13  Mike Frysinger  <vapier@gentoo.org>
+
+	* sim-events.c (sim_events_watch_sim): Change byte_order type to
+	enum bfd_endian.
+	(sim_events_watch_core): Likewise.
+	* sim-events.h (sim_events_watch_sim, sim_events_watch_core): Likewise.
+	* sim-watch.c (schedule_watchpoint): Change 0 to HOST_BYTE_ORDER in
+	call to sim_events_watch_sim.
+
 2021-01-12  Mike Frysinger  <vapier@gentoo.org>
 
 	* sim-profile.h [!WITH_PROFILE]: Rewrite to use #error.
diff --git a/sim/common/sim-events.c b/sim/common/sim-events.c
index db05cafe13e7..6dd0474d91ac 100644
--- a/sim/common/sim-events.c
+++ b/sim/common/sim-events.c
@@ -613,7 +613,7 @@ sim_event *
 sim_events_watch_sim (SIM_DESC sd,
 		      void *host_addr,
 		      int nr_bytes,
-		      int byte_order,
+		      enum bfd_endian byte_order,
 		      int is_within,
 		      unsigned64 lb,
 		      unsigned64 ub,
@@ -692,7 +692,7 @@ sim_events_watch_core (SIM_DESC sd,
 		       address_word core_addr,
 		       unsigned core_map,
 		       int nr_bytes,
-		       int byte_order,
+		       enum bfd_endian byte_order,
 		       int is_within,
 		       unsigned64 lb,
 		       unsigned64 ub,
diff --git a/sim/common/sim-events.h b/sim/common/sim-events.h
index ecd7c592a94c..823fd8c946c0 100644
--- a/sim/common/sim-events.h
+++ b/sim/common/sim-events.h
@@ -161,7 +161,7 @@ extern sim_event *sim_events_watch_sim
 (SIM_DESC sd,
  void *host_addr,
  int nr_bytes,
- int byte_order,
+ enum bfd_endian byte_order,
  int is_within,
  unsigned64 lb,
  unsigned64 ub,
@@ -182,7 +182,7 @@ extern sim_event *sim_events_watch_core
  address_word core_addr,
  unsigned map,
  int nr_bytes,
- int byte_order,
+ enum bfd_endian byte_order,
  int is_within,
  unsigned64 lb,
  unsigned64 ub,
diff --git a/sim/common/sim-watch.c b/sim/common/sim-watch.c
index bbd5be434bea..d69d42cb9540 100644
--- a/sim/common/sim-watch.c
+++ b/sim/common/sim-watch.c
@@ -173,7 +173,7 @@ schedule_watchpoint (SIM_DESC sd,
       point->event = sim_events_watch_sim (sd,
 					   watch->pc,
 					   watch->sizeof_pc,
-					   0/* host-endian */,
+					   HOST_BYTE_ORDER,
 					   point->is_within,
 					   point->arg0, point->arg1,
 					   /* PC in arg0..arg1 */
-- 
2.28.0