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yaml
---
r: 93801
b: refs/heads/master
c: 7a95727
h: refs/heads/master
i:
  93799: db756ec
v: v3
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Harvey Harrison authored and Avi Kivity committed Apr 27, 2008
1 parent 1a07d08 commit 6dc4296
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Showing 2 changed files with 27 additions and 31 deletions.
2 changes: 1 addition & 1 deletion [refs]
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Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: e4706772ea46e57cf69a7140c40063a21884c8e0
refs/heads/master: 7a95727567f0991751c2db774a110b4f8080de7f
56 changes: 26 additions & 30 deletions trunk/arch/x86/kvm/x86_emulate.c
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Original file line number Diff line number Diff line change
Expand Up @@ -501,23 +501,19 @@ register_address(struct decode_cache *c, unsigned long base, unsigned long reg)
return base + address_mask(c, reg);
}

#define register_address_increment(reg, inc) \
do { \
/* signed type ensures sign extension to long */ \
int _inc = (inc); \
if (c->ad_bytes == sizeof(unsigned long)) \
(reg) += _inc; \
else \
(reg) = ((reg) & \
~ad_mask(c)) | \
(((reg) + _inc) & \
ad_mask(c)); \
} while (0)
static inline void
register_address_increment(struct decode_cache *c, unsigned long *reg, int inc)
{
if (c->ad_bytes == sizeof(unsigned long))
*reg += inc;
else
*reg = (*reg & ~ad_mask(c)) | ((*reg + inc) & ad_mask(c));
}

#define JMP_REL(rel) \
do { \
register_address_increment(c->eip, rel); \
} while (0)
static inline void jmp_rel(struct decode_cache *c, int rel)
{
register_address_increment(c, &c->eip, rel);
}

static int do_fetch_insn_byte(struct x86_emulate_ctxt *ctxt,
struct x86_emulate_ops *ops,
Expand Down Expand Up @@ -1065,7 +1061,7 @@ static inline void emulate_push(struct x86_emulate_ctxt *ctxt)
c->dst.type = OP_MEM;
c->dst.bytes = c->op_bytes;
c->dst.val = c->src.val;
register_address_increment(c->regs[VCPU_REGS_RSP], -c->op_bytes);
register_address_increment(c, &c->regs[VCPU_REGS_RSP], -c->op_bytes);
c->dst.ptr = (void *) register_address(c, ctxt->ss_base,
c->regs[VCPU_REGS_RSP]);
}
Expand All @@ -1082,7 +1078,7 @@ static inline int emulate_grp1a(struct x86_emulate_ctxt *ctxt,
if (rc != 0)
return rc;

register_address_increment(c->regs[VCPU_REGS_RSP], c->dst.bytes);
register_address_increment(c, &c->regs[VCPU_REGS_RSP], c->dst.bytes);

return 0;
}
Expand Down Expand Up @@ -1395,7 +1391,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
c->dst.type = OP_MEM;
c->dst.bytes = c->op_bytes;
c->dst.val = c->src.val;
register_address_increment(c->regs[VCPU_REGS_RSP],
register_address_increment(c, &c->regs[VCPU_REGS_RSP],
-c->op_bytes);
c->dst.ptr = (void *) register_address(
c, ctxt->ss_base, c->regs[VCPU_REGS_RSP]);
Expand All @@ -1407,7 +1403,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
c->op_bytes, ctxt->vcpu)) != 0)
goto done;

register_address_increment(c->regs[VCPU_REGS_RSP],
register_address_increment(c, &c->regs[VCPU_REGS_RSP],
c->op_bytes);
c->dst.type = OP_NONE; /* Disable writeback. */
break;
Expand Down Expand Up @@ -1459,7 +1455,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
int rel = insn_fetch(s8, 1, c->eip);

if (test_cc(c->b, ctxt->eflags))
JMP_REL(rel);
jmp_rel(c, rel);
break;
}
case 0x80 ... 0x83: /* Grp1 */
Expand Down Expand Up @@ -1545,10 +1541,10 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
&c->dst.val,
c->dst.bytes, ctxt->vcpu)) != 0)
goto done;
register_address_increment(c->regs[VCPU_REGS_RSI],
register_address_increment(c, &c->regs[VCPU_REGS_RSI],
(ctxt->eflags & EFLG_DF) ? -c->dst.bytes
: c->dst.bytes);
register_address_increment(c->regs[VCPU_REGS_RDI],
register_address_increment(c, &c->regs[VCPU_REGS_RDI],
(ctxt->eflags & EFLG_DF) ? -c->dst.bytes
: c->dst.bytes);
break;
Expand Down Expand Up @@ -1580,10 +1576,10 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)

emulate_2op_SrcV("cmp", c->src, c->dst, ctxt->eflags);

register_address_increment(c->regs[VCPU_REGS_RSI],
register_address_increment(c, &c->regs[VCPU_REGS_RSI],
(ctxt->eflags & EFLG_DF) ? -c->src.bytes
: c->src.bytes);
register_address_increment(c->regs[VCPU_REGS_RDI],
register_address_increment(c, &c->regs[VCPU_REGS_RDI],
(ctxt->eflags & EFLG_DF) ? -c->dst.bytes
: c->dst.bytes);

Expand All @@ -1595,7 +1591,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
ctxt->es_base,
c->regs[VCPU_REGS_RDI]);
c->dst.val = c->regs[VCPU_REGS_RAX];
register_address_increment(c->regs[VCPU_REGS_RDI],
register_address_increment(c, &c->regs[VCPU_REGS_RDI],
(ctxt->eflags & EFLG_DF) ? -c->dst.bytes
: c->dst.bytes);
break;
Expand All @@ -1611,7 +1607,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
c->dst.bytes,
ctxt->vcpu)) != 0)
goto done;
register_address_increment(c->regs[VCPU_REGS_RSI],
register_address_increment(c, &c->regs[VCPU_REGS_RSI],
(ctxt->eflags & EFLG_DF) ? -c->dst.bytes
: c->dst.bytes);
break;
Expand Down Expand Up @@ -1650,14 +1646,14 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
goto cannot_emulate;
}
c->src.val = (unsigned long) c->eip;
JMP_REL(rel);
jmp_rel(c, rel);
c->op_bytes = c->ad_bytes;
emulate_push(ctxt);
break;
}
case 0xe9: /* jmp rel */
case 0xeb: /* jmp rel short */
JMP_REL(c->src.val);
jmp_rel(c, c->src.val);
c->dst.type = OP_NONE; /* Disable writeback. */
break;
case 0xf4: /* hlt */
Expand Down Expand Up @@ -1857,7 +1853,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
goto cannot_emulate;
}
if (test_cc(c->b, ctxt->eflags))
JMP_REL(rel);
jmp_rel(c, rel);
c->dst.type = OP_NONE;
break;
}
Expand Down

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