diff options
| author | bde <bde@FreeBSD.org> | 1994-11-01 23:29:50 +0000 |
|---|---|---|
| committer | bde <bde@FreeBSD.org> | 1994-11-01 23:29:50 +0000 |
| commit | 4d89ead91e74e5a8e60f0f16733d9d8c15d82542 (patch) | |
| tree | 08fde7bf95cd32cf58322e62a2f25b47b58dbc1f /sys/amd64/isa/vector.s | |
| parent | 2fc13b8dd21726f57727d8b4e4a95d8cbc12f1a4 (diff) | |
| download | FreeBSD-src-4d89ead91e74e5a8e60f0f16733d9d8c15d82542.zip FreeBSD-src-4d89ead91e74e5a8e60f0f16733d9d8c15d82542.tar.gz | |
Fix a very old, very stupid race clearing the mask bit for the current
interrupt. Other bits in imen and icu+1 are volatile.
INTREN() and INTRDIS() in icu.h need to be changed similarly.
Change #include's to 2.0 style.
Diffstat (limited to 'sys/amd64/isa/vector.s')
| -rw-r--r-- | sys/amd64/isa/vector.s | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/sys/amd64/isa/vector.s b/sys/amd64/isa/vector.s index 4e5037c..1bc2324 100644 --- a/sys/amd64/isa/vector.s +++ b/sys/amd64/isa/vector.s @@ -1,11 +1,10 @@ /* * from: vector.s, 386BSD 0.1 unknown origin - * $Id: vector.s,v 1.8 1994/08/18 05:09:36 davidg Exp $ + * $Id: vector.s,v 1.9 1994/09/20 21:35:49 bde Exp $ */ -#include "i386/isa/icu.h" -#include "i386/isa/isa.h" -#include "vector.h" +#include <i386/isa/icu.h> +#include <i386/isa/isa.h> #define ICU_EOI 0x20 /* XXX - define elsewhere */ @@ -185,11 +184,13 @@ Xresume/**/irq_num: ; \ movl %eax,_cpl ; \ sti ; \ call *_intr_handler + (irq_num) * 4 ; \ + cli ; /* must unmask _imen and icu atomically */ \ movb _imen + IRQ_BYTE(irq_num),%al ; \ andb $~IRQ_BIT(irq_num),%al ; \ movb %al,_imen + IRQ_BYTE(irq_num) ; \ FASTER_NOP ; \ outb %al,$icu+1 ; \ + sti ; /* XXX _doreti repeats the cli/sti */ \ MEXITCOUNT ; \ /* We could usually avoid the following jmp by inlining some of */ \ /* _doreti, but it's probably better to use less cache. */ \ |
