fix(esp_system/panic): ensure breakpoint set from panic handler gets hit afterwards

components/esp_system/panic.c

@@ -394,6 +394,12 @@ void esp_panic_handler(panic_info_t *info)
         }
         panic_print_str("Setting breakpoint at 0x");
         panic_print_hex((uint32_t)info->addr);
+#if __riscv
+        // Interrupts can trigger before the breakpoint is hit,
+        // so disable them on global level to avoid any further execution.
+        RV_CLEAR_CSR(mstatus, MSTATUS_MPIE | MSTATUS_SPIE | MSTATUS_UPIE);
+        panic_print_str(", disabling global interrupts,");
+#endif
         panic_print_str(" and returning...\r\n");
 
         // Trigger early breakpoint handlers before returning to debugger.
@@ -404,7 +410,13 @@ void esp_panic_handler(panic_info_t *info)
         esp_panic_trigger_event(ESP_SYS_EVENT_PANIC_EARLY_BREAK, &panic_ctx);
 
         panic_disable_all_wdts();
-        esp_cpu_set_breakpoint(0, info->addr); // use breakpoint 0
+        // use breakpoint 0
+        if (esp_cpu_set_breakpoint(0, info->addr) != ESP_OK) {
+#if __riscv
+            // Halt here if unable to set a breakpoint.
+            asm("ebreak");
+#endif
+        }
         return;
     }
 #endif //CONFIG_ESP_DEBUG_OCDAWARE