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/////////////////////////////////////////////////////////////////////////
// $Id: soft_int.cc,v 1.6 2001/10/03 13:10:37 bdenney 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"
#define LOG_THIS BX_CPU_THIS_PTR
void
BX_CPU_C::BOUND_GvMa(BxInstruction_t *i)
{
#if BX_CPU_LEVEL < 2
BX_PANIC(("BOUND_GvMa: not supported on 8086!"));
#else
if (i->mod == 0xc0) {
/* undefined opcode exception */
BX_PANIC(("bound: op2 must be mem ref"));
UndefinedOpcode(i);
}
if (i->os_32) {
Bit32s bound_min, bound_max;
Bit32s op1_32;
op1_32 = BX_READ_32BIT_REG(i->nnn);
read_virtual_dword(i->seg, i->rm_addr, (Bit32u *) &bound_min);
read_virtual_dword(i->seg, i->rm_addr+4, (Bit32u *) &bound_max);
/* ??? */
if ( (op1_32 < bound_min) || (op1_32 > bound_max) ) {
BX_INFO(("BOUND: fails bounds test"));
exception(5, 0, 0);
}
}
else {
Bit16s bound_min, bound_max;
Bit16s op1_16;
op1_16 = BX_READ_16BIT_REG(i->nnn);
read_virtual_word(i->seg, i->rm_addr, (Bit16u *) &bound_min);
read_virtual_word(i->seg, i->rm_addr+2, (Bit16u *) &bound_max);
/* ??? */
if ( (op1_16 < bound_min) || (op1_16 > bound_max) ) {
BX_INFO(("BOUND: fails bounds test"));
exception(5, 0, 0);
}
}
#endif
}
void
BX_CPU_C::INT1(BxInstruction_t *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_int;
#endif
interrupt(1, 1, 0, 0);
BX_INSTR_FAR_BRANCH(BX_INSTR_IS_INT,
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].selector.value,
BX_CPU_THIS_PTR eip);
}
void
BX_CPU_C::INT3(BxInstruction_t *i)
{
// INT 3 is not IOPL sensitive
#if BX_DEBUGGER
BX_CPU_THIS_PTR show_flag |= Flag_int;
#endif
//BX_PANIC(("INT3: bailing"));
interrupt(3, 1, 0, 0);
BX_INSTR_FAR_BRANCH(BX_INSTR_IS_INT,
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].selector.value,
BX_CPU_THIS_PTR eip);
}
void
BX_CPU_C::INT_Ib(BxInstruction_t *i)
{
Bit8u imm8;
#if BX_DEBUGGER
BX_CPU_THIS_PTR show_flag |= Flag_int;
#endif
imm8 = i->Ib;
if (v8086_mode() && (IOPL<3)) {
//BX_INFO(("int_ib: v8086: IOPL<3"));
exception(BX_GP_EXCEPTION, 0, 0);
}
#ifdef SHOW_EXIT_STATUS
if ( (imm8 == 0x21) && (AH == 0x4c) ) {
BX_INFO(("INT 21/4C called AL=0x%02x, BX=0x%04x", (unsigned) AL, (unsigned) BX));
}
#endif
interrupt(imm8, 1, 0, 0);
BX_INSTR_FAR_BRANCH(BX_INSTR_IS_INT,
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].selector.value,
BX_CPU_THIS_PTR eip);
}
void
BX_CPU_C::INTO(BxInstruction_t *i)
{
#if BX_DEBUGGER
BX_CPU_THIS_PTR show_flag |= Flag_int;
#endif
/* ??? is this IOPL sensitive ? */
if (v8086_mode()) BX_PANIC(("soft_int: v8086 mode unsupported"));
if (get_OF()) {
interrupt(4, 1, 0, 0);
BX_INSTR_FAR_BRANCH(BX_INSTR_IS_INT,
BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].selector.value,
BX_CPU_THIS_PTR eip);
}
}
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