cpu/stack64.cc

   1 /////////////////////////////////////////////////////////////////////////
   2 // $Id: stack64.cc,v 1.42 2008/08/08 09:22:49 sshwarts Exp $
   3 /////////////////////////////////////////////////////////////////////////
   4 //
   5 //  Copyright (C) 2001  MandrakeSoft S.A.
   6 //
   7 //    MandrakeSoft S.A.
   8 //    43, rue d'Aboukir
   9 //    75002 Paris - France
  10 //    http://www.linux-mandrake.com/
  11 //    http://www.mandrakesoft.com/
  12 //
  13 //  This library is free software; you can redistribute it and/or
  14 //  modify it under the terms of the GNU Lesser General Public
  15 //  License as published by the Free Software Foundation; either
  16 //  version 2 of the License, or (at your option) any later version.
  17 //
  18 //  This library is distributed in the hope that it will be useful,
  19 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  21 //  Lesser General Public License for more details.
  22 //
  23 //  You should have received a copy of the GNU Lesser General Public
  24 //  License along with this library; if not, write to the Free Software
  25 //  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  26 /////////////////////////////////////////////////////////////////////////
  27
  28 #define NEED_CPU_REG_SHORTCUTS 1
  29 #include "bochs.h"
  30 #include "cpu.h"
  31 #define LOG_THIS BX_CPU_THIS_PTR
  32
  33 #if BX_SUPPORT_X86_64
  34
  35 void BX_CPP_AttrRegparmN(1) BX_CPU_C::POP_EqM(bxInstruction_c *i)
  36 {
  37   BX_CPU_THIS_PTR speculative_rsp = 1;
  38   BX_CPU_THIS_PTR prev_rsp = RSP;
  39
  40   Bit64u val64 = pop_64();
  41
  42   // Note: there is one little weirdism here.  It is possible to use
  43   // RSP in the modrm addressing. If used, the value of RSP after the
  44   // pop is used to calculate the address.
  45   bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
  46
  47   write_virtual_qword_64(i->seg(), eaddr, val64);
  48
  49   BX_CPU_THIS_PTR speculative_rsp = 0;
  50 }
  51
  52 void BX_CPP_AttrRegparmN(1) BX_CPU_C::PUSH_RRX(bxInstruction_c *i)
  53 {
  54   push_64(BX_READ_64BIT_REG(i->opcodeReg()));
  55 }
  56
  57 void BX_CPP_AttrRegparmN(1) BX_CPU_C::POP_RRX(bxInstruction_c *i)
  58 {
  59   BX_WRITE_64BIT_REG(i->opcodeReg(), pop_64());
  60 }
  61
  62 void BX_CPP_AttrRegparmN(1) BX_CPU_C::PUSH64_FS(bxInstruction_c *i)
  63 {
  64   push_64(BX_CPU_THIS_PTR sregs[BX_SEG_REG_FS].selector.value);
  65 }
  66
  67 void BX_CPP_AttrRegparmN(1) BX_CPU_C::PUSH64_GS(bxInstruction_c *i)
  68 {
  69   push_64(BX_CPU_THIS_PTR sregs[BX_SEG_REG_GS].selector.value);
  70 }
  71
  72 void BX_CPP_AttrRegparmN(1) BX_CPU_C::POP64_FS(bxInstruction_c *i)
  73 {
  74   // this way is faster and RSP safe
  75   Bit64u fs = read_virtual_qword_64(BX_SEG_REG_SS, RSP);
  76   load_seg_reg(&BX_CPU_THIS_PTR sregs[BX_SEG_REG_FS], (Bit16u) fs);
  77   RSP += 8;
  78 }
  79
  80 void BX_CPP_AttrRegparmN(1) BX_CPU_C::POP64_GS(bxInstruction_c *i)
  81 {
  82   // this way is faster and RSP safe
  83   Bit64u gs = read_virtual_qword_64(BX_SEG_REG_SS, RSP);
  84   load_seg_reg(&BX_CPU_THIS_PTR sregs[BX_SEG_REG_GS], (Bit16u) gs);
  85   RSP += 8;
  86 }
  87
  88 void BX_CPP_AttrRegparmN(1) BX_CPU_C::PUSH64_Id(bxInstruction_c *i)
  89 {
  90   Bit64u imm64 = (Bit32s) i->Id();
  91   push_64(imm64);
  92 }
  93
  94 void BX_CPP_AttrRegparmN(1) BX_CPU_C::PUSH_EqM(bxInstruction_c *i)
  95 {
  96   bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
  97
  98   Bit64u op1_64 = read_virtual_qword_64(i->seg(), eaddr);
  99
 100   push_64(op1_64);
 101 }
 102
 103 void BX_CPP_AttrRegparmN(1) BX_CPU_C::ENTER64_IwIb(bxInstruction_c *i)
 104 {
 105   Bit8u level = i->Ib2();
 106   level &= 0x1F;
 107
 108   BX_CPU_THIS_PTR speculative_rsp = 1;
 109   BX_CPU_THIS_PTR prev_rsp = RSP;
 110
 111   push_64(RBP);
 112
 113   Bit64u frame_ptr64 = RSP;
 114
 115   if (level > 0) {
 116     /* do level-1 times */
 117     while (--level) {
 118       RBP -= 8;
 119       Bit64u temp64 = read_virtual_qword_64(BX_SEG_REG_SS, RBP);
 120       RSP -= 8;
 121       write_virtual_qword_64(BX_SEG_REG_SS, RSP, temp64);
 122     } /* while (--level) */
 123
 124     /* push(frame pointer) */
 125     RSP -= 8;
 126     write_virtual_qword_64(BX_SEG_REG_SS, RSP, frame_ptr64);
 127   } /* if (level > 0) ... */
 128
 129   RSP -= i->Iw();
 130
 131   // ENTER finishes with memory write check on the final stack pointer
 132   // the memory is touched but no write actually occurs
 133   // emulate it by doing RMW read access from SS:RSP
 134   read_RMW_virtual_qword_64(BX_SEG_REG_SS, RSP);
 135
 136   RBP = frame_ptr64;
 137
 138   BX_CPU_THIS_PTR speculative_rsp = 0;
 139 }
 140
 141 void BX_CPP_AttrRegparmN(1) BX_CPU_C::LEAVE64(bxInstruction_c *i)
 142 {
 143   // restore frame pointer
 144   Bit64u temp64 = read_virtual_qword_64(BX_SEG_REG_SS, RBP);
 145   RSP = RBP + 8;
 146   RBP = temp64;
 147 }
 148
 149 #endif /* if BX_SUPPORT_X86_64 */