target-xtensa: implement instruction breakpoints
Add IBREAKA/IBREAKENABLE SRs and implement debug exception, BREAK and
BREAK.N instructions and IBREAK breakpoints.
IBREAK breakpoint address is considered constant for TB lifetime.
On IBREAKA/IBREAKENABLE change corresponding TBs are invalidated.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
diff --git a/target-xtensa/helpers.h b/target-xtensa/helpers.h
index 09ab332..afe39d4 100644
--- a/target-xtensa/helpers.h
+++ b/target-xtensa/helpers.h
@@ -3,6 +3,8 @@
DEF_HELPER_1(exception, void, i32)
DEF_HELPER_2(exception_cause, void, i32, i32)
DEF_HELPER_3(exception_cause_vaddr, void, i32, i32, i32)
+DEF_HELPER_2(debug_exception, void, i32, i32)
+
DEF_HELPER_1(nsa, i32, i32)
DEF_HELPER_1(nsau, i32, i32)
DEF_HELPER_1(wsr_windowbase, void, i32)
@@ -29,4 +31,7 @@
DEF_HELPER_2(ptlb, i32, i32, i32)
DEF_HELPER_3(wtlb, void, i32, i32, i32)
+DEF_HELPER_1(wsr_ibreakenable, void, i32)
+DEF_HELPER_2(wsr_ibreaka, void, i32, i32)
+
#include "def-helper.h"
