From 77e9aaef19f528d8ced2301fe39eb941a9fdc3e2 Mon Sep 17 00:00:00 2001
From: Tim Newsome <tim@sifive.com>
Date: Thu, 28 Sep 2023 09:08:25 -0700
Subject: [PATCH] debug: Abstract commands fail on unavailable harts.

---
 riscv/debug_module.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/riscv/debug_module.cc b/riscv/debug_module.cc
index 026f4b3d..e9aef1a8 100644
--- a/riscv/debug_module.cc
+++ b/riscv/debug_module.cc
@@ -579,6 +579,10 @@ bool debug_module_t::perform_abstract_command()
     abstractcs.cmderr = CMDERR_BUSY;
     return true;
   }
+  if (!hart_available(dmcontrol.hartsel)) {
+    abstractcs.cmderr = CMDERR_HALTRESUME;
+    return true;
+  }
 
   if ((command >> 24) == 0) {
     // register access