Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Fix mips3 outofworld to panic cleanly even if shutdown path misses K2.

Browse Source 
Previously we jal to panic which never cleared the tlb fault, so if
on the course of shutdown (like a doshutdownhooks() callback) missed
K2, it would panic again.  Fix by setting EPC to panic() and eret.
This commit is contained in:
jeffs 2000-07-25 18:06:49 +00:00
parent 3a90817270
commit 71538e8894
1 changed files with 7 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
sys/arch/mips/mips/locore_mips3.S
View File

@ -1,4 +1,4 @@
/* $NetBSD: locore_mips3.S,v 1.42 2000/07/25 17:56:06 jeffs Exp $ */
/* $NetBSD: locore_mips3.S,v 1.43 2000/07/25 18:06:49 jeffs Exp $ */
/*
* Copyright (c) 1997 Jonathan Stone (hereinafter referred to as the author)
@ -1223,13 +1223,18 @@ LEAF_NOPROFILE(mips3_TLBMissException)
outofworld:
/* Ensure we have a valid sp so panic has a chance */
la a0, 9f # string
la t0,_C_LABEL(panic)
dmfc0 a2, MIPS_COP_0_EXC_PC
move a1, sp
sll k0, k0, PGSHIFT
dmtc0 t0, MIPS_COP_0_EXC_PC # return to panic
li k1, VM_MIN_KERNEL_ADDRESS
addu a3, k0, k1
la sp, start # set sp to a valid place
PANIC("TLB out of universe: ksp was %p, exc PC %p, vaddr %p")
eret
MSG("TLB out of universe: ksp %p epc %p vaddr %p")
.set at
END(mips3_TLBMissException)