From 0300ac3c5d6976538b99049052cbc356e1afdc3a Mon Sep 17 00:00:00 2001
From: Paul Pan <i@0x7f.app>
Date: Mon, 17 Jun 2024 00:47:40 +0800
Subject: [PATCH] chore: kernel: trap: print trace when page fault happens

---
 .vscode/settings.json         | 4 ++++
 kernel/src/arch/riscv/trap.rs | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/.vscode/settings.json b/.vscode/settings.json
index f866177..a210e2c 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -16,5 +16,9 @@
         "**/.rustup/**": true,
         "**/.cargo/registry/**": true,
         "**/.cargo/git/**": true,
+    },
+    "[riscv]": {
+        "editor.indentSize": "tabSize",
+        "editor.tabSize": 8
     }
 }
\ No newline at end of file
diff --git a/kernel/src/arch/riscv/trap.rs b/kernel/src/arch/riscv/trap.rs
index ce6a08a..7f69ee1 100644
--- a/kernel/src/arch/riscv/trap.rs
+++ b/kernel/src/arch/riscv/trap.rs
@@ -93,6 +93,10 @@ impl TrapContextOps for TrapContext {
                 if from_kernel {
                     panic_fatal!("Page Fault in Kernel");
                 }
+
+                let stval = riscv::register::stval::read();
+                trace!("Page Fault: sepc: {:#x}, stval: {:#x}", self.sepc, stval);
+
                 // TODO: handle page fault
             },
             _ => panic_fatal!("Unhandled Trap"),