diff options
| author | Kevin O'Connor <kevin@koconnor.net> | 2014-05-20 17:10:24 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-05-21 18:02:08 +0200 |
| commit | 87446327ccb2e944fe7abc848bab798a0864eb03 (patch) | |
| tree | 278df0c7e3b9f723277300dea6fa85433c62d137 /target-i386 | |
| parent | b763adf1a6b271f17f15ea31fae93d03e980d911 (diff) | |
target-i386: Fix vm86 mode regression introduced in fd460606fd6f.
Commit fd460606fd6f moved setting of eflags above calls to
cpu_x86_load_seg_cache() in seg_helper.c. Unfortunately, in
do_interrupt_protected() this moved the clearing of VM_MASK above a
test for it.
Fix this regression by storing the value of VM_MASK at the start of
do_interrupt_protected().
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'target-i386')
| -rw-r--r-- | target-i386/seg_helper.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/target-i386/seg_helper.c b/target-i386/seg_helper.c index 3cf862ee60..cc7eadf9e2 100644 --- a/target-i386/seg_helper.c +++ b/target-i386/seg_helper.c @@ -558,6 +558,7 @@ static void do_interrupt_protected(CPUX86State *env, int intno, int is_int, int has_error_code, new_stack, shift; uint32_t e1, e2, offset, ss = 0, esp, ss_e1 = 0, ss_e2 = 0; uint32_t old_eip, sp_mask; + int vm86 = env->eflags & VM_MASK; has_error_code = 0; if (!is_int && !is_hw) { @@ -673,7 +674,7 @@ static void do_interrupt_protected(CPUX86State *env, int intno, int is_int, ssp = get_seg_base(ss_e1, ss_e2); } else if ((e2 & DESC_C_MASK) || dpl == cpl) { /* to same privilege */ - if (env->eflags & VM_MASK) { + if (vm86) { raise_exception_err(env, EXCP0D_GPF, selector & 0xfffc); } new_stack = 0; @@ -694,14 +695,14 @@ static void do_interrupt_protected(CPUX86State *env, int intno, int is_int, #if 0 /* XXX: check that enough room is available */ push_size = 6 + (new_stack << 2) + (has_error_code << 1); - if (env->eflags & VM_MASK) { + if (vm86) { push_size += 8; } push_size <<= shift; #endif if (shift == 1) { if (new_stack) { - if (env->eflags & VM_MASK) { + if (vm86) { PUSHL(ssp, esp, sp_mask, env->segs[R_GS].selector); PUSHL(ssp, esp, sp_mask, env->segs[R_FS].selector); PUSHL(ssp, esp, sp_mask, env->segs[R_DS].selector); @@ -718,7 +719,7 @@ static void do_interrupt_protected(CPUX86State *env, int intno, int is_int, } } else { if (new_stack) { - if (env->eflags & VM_MASK) { + if (vm86) { PUSHW(ssp, esp, sp_mask, env->segs[R_GS].selector); PUSHW(ssp, esp, sp_mask, env->segs[R_FS].selector); PUSHW(ssp, esp, sp_mask, env->segs[R_DS].selector); @@ -742,7 +743,7 @@ static void do_interrupt_protected(CPUX86State *env, int intno, int is_int, env->eflags &= ~(TF_MASK | VM_MASK | RF_MASK | NT_MASK); if (new_stack) { - if (env->eflags & VM_MASK) { + if (vm86) { cpu_x86_load_seg_cache(env, R_ES, 0, 0, 0, 0); cpu_x86_load_seg_cache(env, R_DS, 0, 0, 0, 0); cpu_x86_load_seg_cache(env, R_FS, 0, 0, 0, 0); |