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/////////////////////////////////////////////////////////////////////////
// $Id: stack64.cc,v 1.23 2006/03/08 18:21:16 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_SUPPORT_X86_64
void BX_CPU_C::POP_Eq(bxInstruction_c *i)
{
Bit64u val64;
pop_64(&val64);
if (i->modC0()) {
BX_WRITE_64BIT_REG(i->rm(), val64);
}
else {
// Note: there is one little weirdism here. When 64bit addressing
// is used, it is possible to use RSP in the modrm addressing.
// If used, the value of RSP after the pop is used to calculate
// the address.
if (i->as64L() && (!i->modC0()) && (i->rm()==4) && (i->sibBase()==4)) {
// call method on BX_CPU_C object
BX_CPU_CALL_METHODR (i->ResolveModrm, (i));
}
write_virtual_qword(i->seg(), RMAddr(i), &val64);
}
}
void BX_CPU_C::PUSH_RRX(bxInstruction_c *i)
{
push_64(BX_CPU_THIS_PTR gen_reg[i->opcodeReg()].rrx);
}
void BX_CPU_C::POP_RRX(bxInstruction_c *i)
{
Bit64u rrx;
pop_64(&rrx);
BX_CPU_THIS_PTR gen_reg[i->opcodeReg()].rrx = rrx;
}
void BX_CPU_C::PUSH64_FS(bxInstruction_c *i)
{
push_64(BX_CPU_THIS_PTR sregs[BX_SEG_REG_FS].selector.value);
}
void BX_CPU_C::PUSH64_GS(bxInstruction_c *i)
{
push_64(BX_CPU_THIS_PTR sregs[BX_SEG_REG_GS].selector.value);
}
void BX_CPU_C::POP64_FS(bxInstruction_c *i)
{
Bit64u fs;
pop_64(&fs);
load_seg_reg(&BX_CPU_THIS_PTR sregs[BX_SEG_REG_FS], (Bit16u) fs);
}
void BX_CPU_C::POP64_GS(bxInstruction_c *i)
{
Bit64u gs;
pop_64(&gs);
load_seg_reg(&BX_CPU_THIS_PTR sregs[BX_SEG_REG_GS], (Bit16u) gs);
}
void BX_CPU_C::PUSH64_Id(bxInstruction_c *i)
{
Bit64u imm64 = (Bit32s) i->Id();
push_64(imm64);
}
void BX_CPU_C::PUSH_Eq(bxInstruction_c *i)
{
Bit64u op1_64;
/* op1_64 is a register or memory reference */
if (i->modC0()) {
op1_64 = BX_READ_64BIT_REG(i->rm());
}
else {
/* pointer, segment address pair */
read_virtual_qword(i->seg(), RMAddr(i), &op1_64);
}
push_64(op1_64);
}
void BX_CPU_C::ENTER64_IwIb(bxInstruction_c *i)
{
Bit8u level = i->Ib2();
level &= 0x1F;
Bit64u bytes_to_push = 8 + level*8 + i->Iw();
if (! can_push(&BX_CPU_THIS_PTR sregs[BX_SEG_REG_SS].cache, RSP, bytes_to_push))
{
BX_ERROR(("ENTER: not enough room on stack!"));
exception(BX_SS_EXCEPTION, 0, 0);
}
push_64(RBP);
Bit64u frame_ptr64 = RSP;
if (level > 0) {
/* do level-1 times */
while (--level) {
Bit64u temp64;
RBP -= 8;
read_virtual_qword(BX_SEG_REG_SS, RBP, &temp64);
RSP -= 8;
write_virtual_qword(BX_SEG_REG_SS, RSP, &temp64);
} /* while (--level) */
/* push(frame pointer) */
RSP -= 8;
write_virtual_qword(BX_SEG_REG_SS, RSP, &frame_ptr64);
} /* if (level > 0) ... */
RBP = frame_ptr64;
RSP -= i->Iw();
}
void BX_CPU_C::LEAVE64(bxInstruction_c *i)
{
// delete frame
RSP = RBP;
// restore frame pointer
Bit64u temp64;
pop_64(&temp64);
RBP = temp64;
}
#endif /* if BX_SUPPORT_X86_64 */
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