Displaying 4 results from an estimated 4 matches for "eflg_zf".
2011 Nov 30
0
[PATCH 4/4] x86/emulator: cleanup
...byte(s). */
@@ -2418,8 +2419,8 @@ x86_emulate(
put_rep_prefix(1);
/* cmp: dst - src ==> src=*%%edi,dst=*%%esi ==> *%%esi - *%%edi */
emulate_2op_SrcV("cmp", src, dst, _regs.eflags);
- if ( ((rep_prefix == REPE_PREFIX) && !(_regs.eflags & EFLG_ZF)) ||
- ((rep_prefix == REPNE_PREFIX) && (_regs.eflags & EFLG_ZF)) )
+ if ( (repe_prefix() && !(_regs.eflags & EFLG_ZF)) ||
+ (repne_prefix() && (_regs.eflags & EFLG_ZF)) )
_regs.eip = next_eip;
break;
}
@@...
2011 Nov 30
0
[PATCH 3/4] x86/emulator: properly handle lzcnt and tzcnt
...case 0xbc: /* bsf or tzcnt */ {
+ bool_t zf;
asm ( "bsf %2,%0; setz %b1"
: "=r" (dst.val), "=q" (zf)
- : "r" (src.val), "1" (0) );
+ : "r" (src.val) );
_regs.eflags &= ~EFLG_ZF;
- if ( zf )
+ if ( (rep_prefix == REPE_PREFIX) && vcpu_has_bmi1() )
+ {
+ _regs.eflags &= ~EFLG_CF;
+ if ( zf )
+ {
+ _regs.eflags |= EFLG_CF;
+ dst.val = op_bytes * 8;
+ }
+ else...
2008 Apr 21
1
[PATCH] x86-64: emulation support for cmpxchg16b
..._lo, 4, ctxt)) ||
- (rc = ops->read(ea.mem.seg, ea.mem.off+4, &old_hi, 4, ctxt)) )
- goto done;
- if ( (old_lo != _regs.eax) || (old_hi != _regs.edx) )
- {
- _regs.eax = old_lo;
- _regs.edx = old_hi;
- _regs.eflags &= ~EFLG_ZF;
- }
- else if ( ops->cmpxchg8b == NULL )
- {
- rc = X86EMUL_UNHANDLEABLE;
- goto done;
- }
- else
+#ifdef __x86_64__
+ if ( op_bytes != 8 )
{
- if ( (rc = ops->cmpxchg8b(ea.mem.seg, ea.mem.off, old_lo, old_hi...
2012 May 04
9
[hybrid]: unable to boot hvm due to eflags.ID
Hi guys,
At a loss trying to figure why
if (has_eflag(X86_EFLAGS_ID))
returns false in my HVM domU. Standard function has_eflag() in
cpucheck.c running in real mode. Works fine on PV dom0, but fails when
guest is booting on my hybrid dom0.
LMK if any ideas. I''ll keep digging in the manuals, but nothing so far.
thanks,
Mukesh