With optimizations disabled, the compiler generated a call for
irq_enable() -- rather than just inlining an sti instruction as
expected. Thus the irq_enable ret would run in the sti shadow and the
vectors would fire in the wrong order.
Signed-off-by: Peter Feiner <pfeiner@xxxxxxxxxx>
---
x86/eventinj.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/x86/eventinj.c b/x86/eventinj.c
index bddedce..202ac19 100644
--- a/x86/eventinj.c
+++ b/x86/eventinj.c
@@ -296,8 +296,7 @@ int main()
apic_self_ipi(32);
flush_stack();
io_delay();
- irq_enable();
- asm volatile ("int $33");
+ asm volatile ("sti; int $33");
irq_disable();
printf("After vec 32 and int $33\n");
report("vec 32/int $33", test_count == 2);
--
2.7.0.rc3.207.g0ac5344
--
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