160 lines
4.4 KiB
C++
160 lines
4.4 KiB
C++
/////////////////////////////////////////////////////////////////////////
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// $Id: soft_int.cc,v 1.33 2007-11-17 12:44:10 sshwarts Exp $
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/////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2001 MandrakeSoft S.A.
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//
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// MandrakeSoft S.A.
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// 43, rue d'Aboukir
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// 75002 Paris - France
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// http://www.linux-mandrake.com/
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// http://www.mandrakesoft.com/
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#define NEED_CPU_REG_SHORTCUTS 1
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#include "bochs.h"
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#include "cpu.h"
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#define LOG_THIS BX_CPU_THIS_PTR
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#if BX_EXTERNAL_DEBUGGER
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#include "extdb.h"
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#endif
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void BX_CPU_C::BOUND_GwMa(bxInstruction_c *i)
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{
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Bit16s bound_min, bound_max;
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Bit16s op1_16 = BX_READ_16BIT_REG(i->nnn());
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read_virtual_word(i->seg(), RMAddr(i), (Bit16u *) &bound_min);
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read_virtual_word(i->seg(), RMAddr(i)+2, (Bit16u *) &bound_max);
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if (op1_16 < bound_min || op1_16 > bound_max) {
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BX_INFO(("BOUND_GdMa: fails bounds test"));
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exception(BX_BR_EXCEPTION, 0, 0);
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}
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}
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void BX_CPU_C::BOUND_GdMa(bxInstruction_c *i)
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{
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Bit32s bound_min, bound_max;
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Bit32s op1_32 = BX_READ_32BIT_REG(i->nnn());
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read_virtual_dword(i->seg(), RMAddr(i), (Bit32u *) &bound_min);
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read_virtual_dword(i->seg(), RMAddr(i)+4, (Bit32u *) &bound_max);
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if (op1_32 < bound_min || op1_32 > bound_max) {
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BX_INFO(("BOUND_GdMa: fails bounds test"));
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exception(BX_BR_EXCEPTION, 0, 0);
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}
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}
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void BX_CPU_C::INT1(bxInstruction_c *i)
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{
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// This is an undocumented instrucion (opcode 0xf1)
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// which is useful for an ICE system.
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#if BX_DEBUGGER
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BX_CPU_THIS_PTR show_flag |= Flag_softint;
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#endif
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#if BX_EXTERNAL_DEBUGGER
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trap_debugger(0);
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#endif
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interrupt(1, 1, 0, 0);
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BX_INSTR_FAR_BRANCH(BX_CPU_ID, BX_INSTR_IS_INT,
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BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].selector.value,
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EIP);
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}
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void BX_CPU_C::INT3(bxInstruction_c *i)
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{
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// INT 3 is not IOPL sensitive
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#if BX_DEBUGGER
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BX_CPU_THIS_PTR show_flag |= Flag_softint;
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#endif
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interrupt(3, 1, 0, 0);
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BX_INSTR_FAR_BRANCH(BX_CPU_ID, BX_INSTR_IS_INT,
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BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].selector.value,
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EIP);
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}
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void BX_CPU_C::INT_Ib(bxInstruction_c *i)
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{
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#if BX_DEBUGGER
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BX_CPU_THIS_PTR show_flag |= Flag_softint;
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#endif
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Bit8u vector = i->Ib();
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if (v8086_mode()) {
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#if BX_SUPPORT_VME
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if (BX_CPU_THIS_PTR cr4.get_VME())
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{
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Bit8u vme_redirection_bitmap;
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Bit16u io_base;
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access_linear(BX_CPU_THIS_PTR tr.cache.u.system.base + 102,
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2, 0, BX_READ, &io_base);
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access_linear(BX_CPU_THIS_PTR tr.cache.u.system.base + io_base - 32 + (vector >> 3),
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1, 0, BX_READ, &vme_redirection_bitmap);
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if (! (vme_redirection_bitmap & (1 << (vector & 7))))
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{
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// redirect interrupt through virtual-mode idt
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v86_redirect_interrupt(vector);
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return;
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}
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}
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#endif
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// interrupt is not redirected or VME is OFF
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if (BX_CPU_THIS_PTR get_IOPL() < 3)
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{
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BX_DEBUG(("INT_Ib(): Interrupt cannot be redirected, generate #GP(0)"));
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exception(BX_GP_EXCEPTION, 0, 0);
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}
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}
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#ifdef SHOW_EXIT_STATUS
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if ( (vector == 0x21) && (AH == 0x4c) ) {
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BX_INFO(("INT 21/4C called AL=0x%02x, BX=0x%04x", (unsigned) AL, (unsigned) BX));
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}
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#endif
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interrupt(vector, 1, 0, 0);
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BX_INSTR_FAR_BRANCH(BX_CPU_ID, BX_INSTR_IS_INT,
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BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].selector.value,
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EIP);
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}
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void BX_CPU_C::INTO(bxInstruction_c *i)
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{
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#if BX_DEBUGGER
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BX_CPU_THIS_PTR show_flag |= Flag_softint;
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#endif
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if (get_OF()) {
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interrupt(4, 1, 0, 0);
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BX_INSTR_FAR_BRANCH(BX_CPU_ID, BX_INSTR_IS_INT,
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BX_CPU_THIS_PTR sregs[BX_SEG_REG_CS].selector.value,
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EIP);
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}
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}
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