add user defined interrupt handler

tw4452852 · Aug 29, 2013 · 1176ab4 · 1176ab4
1 parent 3316df8
commit 1176ab4
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Showing 2 changed files with 9 additions and 1 deletion.
diff --git a/boot/interrupt.h b/boot/interrupt.h
@@ -5,7 +5,7 @@
 #include "common.h"
 
 #define IDT_MAX_EXCEPTION 32
-#define IDT_MAX_DESCS (IDT_MAX_EXCEPTION)
+#define IDT_MAX_DESCS 256
 #define EXCEPTION_ERRCODE_MASK 0x00027d00
 
 #ifndef __ASSEMBLY__

diff --git a/boot/isr.S b/boot/isr.S
@@ -5,6 +5,7 @@ recursion_flag: .long 0
 .globl interrupt_handler_start
 interrupt_handler_start:
 i = 0
+# intel reserve exception or fault
 .rept IDT_MAX_EXCEPTION
  .if (EXCEPTION_ERRCODE_MASK >> i) & 1
  nop
@@ -16,6 +17,13 @@ i = 0
  jmp exception_handler
 i = i + 1
 .endr
+# user defined interrupt
+.rept IDT_MAX_DESCS - IDT_MAX_EXCEPTION
+ pushl $0
+ pushl $i
+ jmp exception_handler
+i = i + 1
+.endr
 
 exception_handler:
  cmpl $2, %ss:recursion_flag