From 3564348eecfcf73e2105ea4ca954dd53e9fe89d9 Mon Sep 17 00:00:00 2001
From: Jan Vrany <jan.vrany@labware.com>
Date: Tue, 8 Aug 2023 15:19:30 +0100
Subject: [PATCH] arch-riscv: Report traps to GDB in SE mode

This commit add code to report illegal instruction and breakpoint traps
to GDB (if connected). This merely follows what POWER does.
---
 src/arch/riscv/faults.cc | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/arch/riscv/faults.cc b/src/arch/riscv/faults.cc
index 9bea0668e8..89bb838f88 100644
--- a/src/arch/riscv/faults.cc
+++ b/src/arch/riscv/faults.cc
@@ -205,9 +205,11 @@ UnknownInstFault::invokeSE(ThreadContext *tc, const StaticInstPtr &inst)
 void
 IllegalInstFault::invokeSE(ThreadContext *tc, const StaticInstPtr &inst)
 {
-    auto *rsi = static_cast<RiscvStaticInst *>(inst.get());
-    panic("Illegal instruction 0x%08x at pc %s: %s", rsi->machInst,
-        tc->pcState(), reason.c_str());
+    if (! tc->getSystemPtr()->trapToGdb(GDBSignal::ILL, tc->contextId()) ) {
+        auto *rsi = static_cast<RiscvStaticInst *>(inst.get());
+        panic("Illegal instruction 0x%08x at pc %s: %s", rsi->machInst,
+            tc->pcState(), reason.c_str());
+    }
 }
 
 void
@@ -226,7 +228,9 @@ IllegalFrmFault::invokeSE(ThreadContext *tc, const StaticInstPtr &inst)
 void
 BreakpointFault::invokeSE(ThreadContext *tc, const StaticInstPtr &inst)
 {
-    schedRelBreak(0);
+    if (! tc->getSystemPtr()->trapToGdb(GDBSignal::TRAP, tc->contextId()) ) {
+        schedRelBreak(0);
+    }
 }
 
 void