[SeaBIOS] [PATCH] nmi: Don't try to switch onto extra stack in NMI handler
Kevin O'Connor
kevin at koconnor.net
Wed Dec 23 21:47:26 CET 2015
The NMI could occur when already on the extra stack, which would
corrupt it. Always use the current stack on an NMI to avoid this.
Signed-off-by: Kevin O'Connor <kevin at koconnor.net>
---
src/romlayout.S | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/src/romlayout.S b/src/romlayout.S
index fedadfe..53cc0f5 100644
--- a/src/romlayout.S
+++ b/src/romlayout.S
@@ -548,7 +548,10 @@ entry_post:
ENTRY_INTO32 _cfunc32flat_handle_post // Normal entry point
ORG 0xe2c3
- IRQ_ENTRY 02
+ .global entry_02
+entry_02:
+ ENTRY handle_02 // NMI handler does not switch onto extra stack
+ iretw
ORG 0xe3fe
.global entry_13_official
--
2.5.0
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