From 9566dac198f685ef947d82facee0be182a77495e Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Fri, 9 Jul 2021 18:27:47 +0200
Subject: implement basic kernel panics

---
 platform/asm.h      | 9 +++++++++
 platform/boot.s     | 5 ++++-
 platform/sysenter.h | 4 ----
 3 files changed, 13 insertions(+), 5 deletions(-)
 create mode 100644 platform/asm.h
 delete mode 100644 platform/sysenter.h

(limited to 'platform')

diff --git a/platform/asm.h b/platform/asm.h
new file mode 100644
index 0000000..6f72617
--- /dev/null
+++ b/platform/asm.h
@@ -0,0 +1,9 @@
+#pragma once
+
+// boot.s
+__attribute__((noreturn))
+void halt_cpu();
+
+// sysenter.c
+void sysexit(void (*fun)(), void *stack_top);
+void sysenter_setup();
diff --git a/platform/boot.s b/platform/boot.s
index 6052347..c2a06c3 100644
--- a/platform/boot.s
+++ b/platform/boot.s
@@ -27,7 +27,10 @@ _start:
 	mov $stack_top, %esp
 	call kmain
 
-	cli /* disable interrupts */
+.global halt_cpu
+.type halt_cpu, @function
+halt_cpu:
+	cli
 1:	hlt
 	jmp 1b
 
diff --git a/platform/sysenter.h b/platform/sysenter.h
deleted file mode 100644
index b0495cc..0000000
--- a/platform/sysenter.h
+++ /dev/null
@@ -1,4 +0,0 @@
-#pragma once
-
-void sysexit(void (*fun)(), void *stack_top);
-void sysenter_setup();
-- 
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