Imbus/xv6-riscv-kernel
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interrupts could be recursive since lapic_eoi() called before rti

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so fast interrupts overflow the kernel stack
fix: cli() before lapic_eoi()
This commit is contained in:
rtm 2006-08-10 22:08:14 +00:00
parent 8a8be1b8c3
commit 5be0039ce9
16 changed files with 194 additions and 28 deletions
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mmu.h
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@ -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 -