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-rw-r--r--trap.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/trap.c b/trap.c
new file mode 100644
index 0000000..9d867fe
--- /dev/null
+++ b/trap.c
@@ -0,0 +1,34 @@
+#include "types.h"
+#include "param.h"
+#include "mmu.h"
+#include "proc.h"
+#include "defs.h"
+#include "x86.h"
+
+struct Gatedesc idt[256];
+struct Pseudodesc idt_pd = { 0, sizeof(idt) - 1, (unsigned) &idt };
+extern unsigned vectors[]; /* vectors.S, array of 256 entry point addresses */
+
+extern void trapenter();
+extern void trapenter1();
+
+void
+tinit()
+{
+ int i;
+
+ for(i = 0; i < 256; i++){
+ SETGATE(idt[i], 1, SEG_KCODE << 3, vectors[i], 3);
+ }
+ asm volatile("lidt %0" : : "g" (idt_pd.pd_lim));
+}
+
+void
+trap(struct Trapframe *tf)
+{
+ /* which process are we running? */
+ cprintf("trap %d tf %x\n", tf->tf_trapno, tf);
+ while(1)
+ ;
+ // XXX probably ought to lgdt on trap return
+}