diff options
| author | bellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162> | 2004-06-04 11:20:49 +0000 |
|---|---|---|
| committer | bellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162> | 2004-06-04 11:20:49 +0000 |
| commit | 710c15a2e9078931f496424d8e10241f4930f940 (patch) | |
| tree | 1981751690ff78c935cbc02f3bb1c74bc900805c /target-i386 | |
| parent | 443f1376bc5f35159d09b043c0fdca3a1c4e0af1 (diff) | |
lmsw fix (aka dos4gw bug)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@885 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'target-i386')
| -rw-r--r-- | target-i386/op.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/target-i386/op.c b/target-i386/op.c index 3f9afb17d3..8b28007078 100644 --- a/target-i386/op.c +++ b/target-i386/op.c @@ -980,8 +980,9 @@ void OPPROTO op_movl_drN_T0(void) void OPPROTO op_lmsw_T0(void) { - /* only 4 lower bits of CR0 are modified */ - T0 = (env->cr[0] & ~0xf) | (T0 & 0xf); + /* only 4 lower bits of CR0 are modified. PE cannot be set to zero + if already set to one. */ + T0 = (env->cr[0] & ~0xe) | (T0 & 0xf); helper_movl_crN_T0(0); } |