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undefined CR fault higher prio than CPL GP

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This commit is contained in:
Stanislav Shwartsman 2010-05-02 15:10:27 +00:00
parent 7d1d56a6d2
commit acc82363cd
1 changed files with 47 additions and 35 deletions
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82
bochs/cpu/crregs.cc
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@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: crregs.cc,v 1.14 2010-04-29 19:34:32 sshwarts Exp $
// $Id: crregs.cc,v 1.15 2010-05-02 15:10:27 sshwarts Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2010 Stanislav Shwartsman
@ -54,12 +54,6 @@ void BX_CPP_AttrRegparmN(1) BX_CPU_C::MOV_DdRd(bxInstruction_c *i)
exception(BX_GP_EXCEPTION, 0);
}
/* NOTES:
* 32bit operands always used
* r/m field specifies general register
* reg field specifies which special register
*/
invalidate_prefetch_q();
/* This instruction is always treated as a register-to-register,
@ -214,12 +208,6 @@ void BX_CPP_AttrRegparmN(1) BX_CPU_C::MOV_DqRq(bxInstruction_c *i)
VMexit_DR_Access(i, 0 /* write */);
#endif
/* NOTES:
* 64bit operands always used
* r/m field specifies general register
* reg field specifies which special register
*/
if (BX_CPU_THIS_PTR cr4.get_DE()) {
if ((i->nnn() & 0xE) == 4) {
BX_ERROR(("MOV_DqRq: access to DR4/DR5 causes #UD"));
@ -227,6 +215,11 @@ void BX_CPP_AttrRegparmN(1) BX_CPU_C::MOV_DqRq(bxInstruction_c *i)
}
}
if (i->nnn() >= 8) {
BX_ERROR(("MOV_DqRq: #UD - register index out of range"));
exception(BX_UD_EXCEPTION, 0);
}
// Note: processor clears GD upon entering debug exception
// handler, to allow access to the debug registers
if (BX_CPU_THIS_PTR dr7 & 0x2000) { // GD bit set
@ -338,6 +331,11 @@ void BX_CPP_AttrRegparmN(1) BX_CPU_C::MOV_RqDq(bxInstruction_c *i)
}
}
if (i->nnn() >= 8) {
BX_ERROR(("MOV_RqDq: #UD - register index out of range"));
exception(BX_UD_EXCEPTION, 0);
}
// Note: processor clears GD upon entering debug exception
// handler, to allow access to the debug registers
if (BX_CPU_THIS_PTR dr7 & 0x2000) { // GD bit set
@ -391,16 +389,22 @@ void BX_CPP_AttrRegparmN(1) BX_CPU_C::MOV_RqDq(bxInstruction_c *i)
void BX_CPP_AttrRegparmN(1) BX_CPU_C::MOV_CdRd(bxInstruction_c *i)
{
unsigned cr_ok = 0x0d;
#if BX_CPU_LEVEL >= 4
cr_ok |= 0x10;
#endif
if (! (cr_ok & (1 << i->nnn()))) {
BX_ERROR(("MOV_CdRd: #UD - register index out of range"));
exception(BX_UD_EXCEPTION, 0);
}
if (!real_mode() && CPL!=0) {
BX_ERROR(("MOV_CdRd: CPL!=0 not in real mode"));
exception(BX_GP_EXCEPTION, 0);
}
/* NOTES:
* 32bit operands always used
* r/m field specifies general register
* reg field specifies which special register
*/
invalidate_prefetch_q();
/* This instruction is always treated as a register-to-register,
* regardless of the encoding of the MOD field in the MODRM byte.
@ -461,17 +465,21 @@ void BX_CPP_AttrRegparmN(1) BX_CPU_C::MOV_RdCd(bxInstruction_c *i)
// mov control register data to register
Bit32u val_32 = 0;
unsigned cr_ok = 0x0d;
#if BX_CPU_LEVEL >= 4
cr_ok |= 0x10;
#endif
if (! (cr_ok & (1 << i->nnn()))) {
BX_ERROR(("MOV_RdCd: #UD - register index out of range"));
exception(BX_UD_EXCEPTION, 0);
}
if (!real_mode() && CPL!=0) {
BX_ERROR(("MOV_RdCd: CPL!=0 not in real mode"));
exception(BX_GP_EXCEPTION, 0);
}
/* NOTES:
* 32bit operands always used
* r/m field specifies general register
* reg field specifies which special register
*/
/* This instruction is always treated as a register-to-register,
* regardless of the encoding of the MOD field in the MODRM byte.
*/
@ -507,11 +515,12 @@ void BX_CPP_AttrRegparmN(1) BX_CPU_C::MOV_RdCd(bxInstruction_c *i)
#if BX_SUPPORT_X86_64
void BX_CPP_AttrRegparmN(1) BX_CPU_C::MOV_CqRq(bxInstruction_c *i)
{
/* NOTES:
* 64bit operands always used
* r/m field specifies general register
* reg field specifies which special register
*/
unsigned cr_ok = 0x011d;
if (! (cr_ok & (1 << i->nnn()))) {
BX_ERROR(("MOV_CqRq: #UD - register index out of range"));
exception(BX_UD_EXCEPTION, 0);
}
/* #GP(0) if CPL is not 0 */
if (CPL!=0) {
@ -519,6 +528,8 @@ void BX_CPP_AttrRegparmN(1) BX_CPU_C::MOV_CqRq(bxInstruction_c *i)
exception(BX_GP_EXCEPTION, 0);
}
invalidate_prefetch_q();
/* This instruction is always treated as a register-to-register,
* regardless of the encoding of the MOD field in the MODRM byte.
*/
@ -591,15 +602,16 @@ void BX_CPP_AttrRegparmN(1) BX_CPU_C::MOV_CqRq(bxInstruction_c *i)
void BX_CPP_AttrRegparmN(1) BX_CPU_C::MOV_RqCq(bxInstruction_c *i)
{
unsigned cr_ok = 0x011d;
if (! (cr_ok & (1 << i->nnn()))) {
BX_ERROR(("MOV_RqCq: #UD - register index out of range"));
exception(BX_UD_EXCEPTION, 0);
}
// mov control register data to register
Bit64u val_64 = 0;
/* NOTES:
* 64bit operands always used
* r/m field specifies general register
* reg field specifies which special register
*/
/* #GP(0) if CPL is not 0 */
if (CPL!=0) {
BX_ERROR(("MOV_RqCq: #GP(0) if CPL is not 0"));