[SeaBIOS] [PATCH] vgabios: Add debug message if x86emu leal check triggers.
Kevin O'Connor
kevin at koconnor.net
Tue May 13 19:46:37 CEST 2014
Signed-off-by: Kevin O'Connor <kevin at koconnor.net>
---
vgasrc/vgaentry.S | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/vgasrc/vgaentry.S b/vgasrc/vgaentry.S
index 6e31c4e..11197f1 100644
--- a/vgasrc/vgaentry.S
+++ b/vgasrc/vgaentry.S
@@ -47,7 +47,17 @@ _rom_header_signature:
// Force a fault if found to be running on broken x86emu versions.
DECLFUNC x86emu_fault
+msg: .ascii "SeaVGABIOS: x86emu leal trap!\n"
x86emu_fault:
+#if CONFIG_DEBUG_IO
+ movw %cs:DebugOutputPort, %dx
+ movw $msg, %si
+1: movb %cs:(%si), %al
+ outb %al, (%dx)
+ incw %si
+ cmpw $x86emu_fault, %si
+ jl 1b
+#endif
1: hlt
jmp 1b
--
1.9.0
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