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/////////////////////////////////////////////////////////////////////////
// $Id: soft_int.cc,v 1.31 2006/06/25 21:44:46 sshwarts Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2001 MandrakeSoft S.A.
//
// MandrakeSoft S.A.
// 43, rue d'Aboukir
// 75002 Paris - France
// http://www.linux-mandrake.com/
// http://www.mandrakesoft.com/
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#define NEED_CPU_REG_SHORTCUTS 1
#include "bochs.h"
#include "cpu.h"
#define LOG_THIS BX_CPU_THIS_PTR
#if BX_EXTERNAL_DEBUGGER
#include "extdb.h"
#endif
void BX_CPU_C::BOUND_GwMa(bxInstruction_c *i)
{
if (i->modC0()) {
BX_INFO(("BOUND_GwMa: op2 must be memory reference"));
UndefinedOpcode(i);
}
Bit16s bound_min, bound_max;
Bit16s op1_16 = BX_READ_16BIT_REG(i->nnn());
read_virtual_word(i->seg(), RMAddr(i), (Bit16u *) &bound_min);
read_virtual_word(i->seg(), RMAddr(i)+2, (Bit16u *) &bound_max);
if (op1_16 < bound_min || op1_16 > bound_max) {
BX_INFO(("BOUND_GdMa: fails bounds test"));
exception(BX_BR_EXCEPTION, 0, 0);
}
}
void BX_CPU_C::BOUND_GdMa(bxInstruction_c *i)
{
if (i->modC0()) {
BX_INFO(("BOUND_GdMa: op2 must be memory reference"));
UndefinedOpcode(i);
}
Bit32s bound_min, bound_max;
Bit32s op1_32 = BX_READ_32BIT_REG(i->nnn());
read_virtual_dword(i->seg(), RMAddr(i), (Bit32u *) &bound_min);
read_virtual_dword(i->seg(), RMAddr(i)+4, (Bit32u *) &bound_max);
if (op1_32 < bound_min || op1_32 > bound_max) {
BX_INFO(("BOUND_GdMa: fails bounds test"));
exception(BX_BR_EXCEPTION, 0, 0);
}
}
void BX_CPU_C::INT1(bxInstruction_c *i)
{
// This is an undocumented instrucion (opcode 0xf1)
// which is useful for an ICE system.
#if BX_DEBUGGER
BX_CPU_THIS_PTR show_flag |= Flag_softint;
#endif
#if BX_EXTERNAL_DEBUGGER
trap_debugger(0);
#endif
interrupt(1, 1, 0, 0);
BX_INSTR_FAR_BRANCH(BX_CPU_ID, BX_INSTR_IS_INT,
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].selector.value,
EIP);
}
void BX_CPU_C::INT3(bxInstruction_c *i)
{
// INT 3 is not IOPL sensitive
#if BX_DEBUGGER
BX_CPU_THIS_PTR show_flag |= Flag_softint;
#endif
interrupt(3, 1, 0, 0);
BX_INSTR_FAR_BRANCH(BX_CPU_ID, BX_INSTR_IS_INT,
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].selector.value,
EIP);
}
void BX_CPU_C::INT_Ib(bxInstruction_c *i)
{
#if BX_DEBUGGER
BX_CPU_THIS_PTR show_flag |= Flag_softint;
#endif
Bit8u vector = i->Ib();
if (v8086_mode()) {
#if BX_SUPPORT_VME
if (BX_CPU_THIS_PTR cr4.get_VME())
{
Bit8u vme_redirection_bitmap;
Bit16u io_base;
access_linear(BX_CPU_THIS_PTR tr.cache.u.tss.base + 102,
2, 0, BX_READ, &io_base);
access_linear(BX_CPU_THIS_PTR tr.cache.u.tss.base + io_base - 32 + (vector >> 3),
1, 0, BX_READ, &vme_redirection_bitmap);
if (! (vme_redirection_bitmap & (1 << (vector & 7))))
{
// redirect interrupt through virtual-mode idt
v86_redirect_interrupt(vector);
return;
}
}
#endif
// interrupt is not redirected or VME is OFF
if (BX_CPU_THIS_PTR get_IOPL() < 3)
{
BX_DEBUG(("INT_Ib(): Interrupt cannot be redirected, generate #GP(0)"));
exception(BX_GP_EXCEPTION, 0, 0);
}
}
#ifdef SHOW_EXIT_STATUS
if ( (vector == 0x21) && (AH == 0x4c) ) {
BX_INFO(("INT 21/4C called AL=0x%02x, BX=0x%04x", (unsigned) AL, (unsigned) BX));
}
#endif
interrupt(vector, 1, 0, 0);
BX_INSTR_FAR_BRANCH(BX_CPU_ID, BX_INSTR_IS_INT,
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].selector.value,
EIP);
}
void BX_CPU_C::INTO(bxInstruction_c *i)
{
#if BX_DEBUGGER
BX_CPU_THIS_PTR show_flag |= Flag_softint;
#endif
if (get_OF()) {
interrupt(4, 1, 0, 0);
BX_INSTR_FAR_BRANCH(BX_CPU_ID, BX_INSTR_IS_INT,
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].selector.value,
EIP);
}
}
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