From 79f23820ea388adb4411857b7ee6f145cb8d5e28 Mon Sep 17 00:00:00 2001
From: Alex Gaynor <alex.gaynor@gmail.com>
Date: Sat, 26 May 2018 20:23:03 +0000
Subject: [PATCH 1/2] Fixes #18 -- call the kerne's BUG macro when we panic

---
 src/helpers.c | 8 +++++++-
 src/lib.rs    | 8 +++++++-
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/helpers.c b/src/helpers.c
index 9fe5cdba..e3d8289c 100644
--- a/src/helpers.c
+++ b/src/helpers.c
@@ -1,6 +1,12 @@
+#include <linux/bug.h>
 #include <linux/printk.h>
 
 int printk_helper(const unsigned char *s, int len)
 {
-	return printk(KERN_INFO "%.*s", len, (const char *)s);
+    return printk(KERN_INFO "%.*s", len, (const char *)s);
+}
+
+void bug_helper(void)
+{
+    BUG();
 }
diff --git a/src/lib.rs b/src/lib.rs
index d71e0d5d..02bfe1a3 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -64,12 +64,18 @@ pub trait KernelModule: Sized {
     fn init() -> KernelResult<Self>;
 }
 
+extern "C" {
+    fn bug_helper() -> !;
+}
+
 #[lang = "eh_personality"]
 extern "C" fn eh_personality() {}
 
 #[lang = "panic_fmt"]
 extern "C" fn panic_fmt() -> ! {
-    loop {}
+    unsafe {
+        bug_helper();
+    }
 }
 
 #[global_allocator]

From 8e7bc4c4567cc0fc1113a08921936b769ae43ebd Mon Sep 17 00:00:00 2001
From: Alex Gaynor <alex.gaynor@gmail.com>
Date: Sun, 27 May 2018 12:00:08 +0000
Subject: [PATCH 2/2] Show dmesg in travis on failure to enable debugging

---
 .travis.yml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index b97bd676..d1bf4d37 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -31,9 +31,12 @@ script:
     - cd $MODULE_DIR
     - RUST_TARGET_PATH="$(pwd)/.." cargo xbuild --target x86_64-linux-kernel-module
     - make
+    - sudo dmesg -C
     - sudo insmod "${MODULE}.ko"
     - sudo rmmod "$MODULE"
 
+after_failure:
+    - dmesg
 
 notifications:
     email: false