interrupts could be recursive since lapic_eoi() called before rti

so fast interrupts overflow the kernel stack
fix: cli() before lapic_eoi()

1 files changed, 1 insertions, 0 deletions

diff --git a/mmu.h b/mmu.h
index 82fb89d..0cd7944 100644
--- a/mmu.h
+++ b/mmu.h
@@ -178,6 +178,7 @@ struct gatedesc {
 
 // Set up a normal interrupt/trap gate descriptor.
 // - istrap: 1 for a trap (= exception) gate, 0 for an interrupt gate.
+//   interrupt gate clears FL_IF, trap gate leaves FL_IF alone
 // - sel: Code segment selector for interrupt/trap handler
 // - off: Offset in code segment for interrupt/trap handler
 // - dpl: Descriptor Privilege Level -