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hinstruction16.cpp
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hinstruction16.cpp
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#include "Emulator.h"
#include "ModRM.h"
hinstruction_func_t* hinstructions16[0xffff];
namespace hinstruction16{
/*
void push_es(Emulator *emu, sig_ucontext_t* uc){
//uint32_t *rsp = (uint32_t *)uc->uc_mcontext.rsp;
//printf("rsp: %lx\n", *rsp);
if (emu->ESP_top != (uint32_t )uc->uc_mcontext.rsp){
emu->ESP_top = (uint32_t )uc->uc_mcontext.rsp;
emu->ESP = (uint32_t )uc->uc_mcontext.rsp;
}
uint32_t * pc = (uint32_t *)uc->uc_mcontext.rip;
printf("cs : %x\n", (uint32_t )uc->uc_mcontext.cs);
emu->Push16(emu->sgregs[0].base);
emu->ESP = emu->ESP - 2;
uc->uc_mcontext.rip++;
}
*/
/*
void mov_r32_rm32(Emulator *emu){
emu->EIP++;
ModRM modrm(emu);
uint32_t rm32 = modrm.GetRM32();
modrm.SetR32(rm32);
}
*/
void mov_r32_rm32(Emulator *emu, sig_ucontext_t* uc){
uc->uc_mcontext.rip++;
ModRM modrm(emu, uc);
emu->instr.opecode = *(uint8_t *)uc->uc_mcontext.rip;
modrm.SetR32(modrm.GetRM32());
}
void mov_r32_imm32(Emulator *emu, sig_ucontext_t* uc){
uc->uc_mcontext.rip++;
ModRM modrm(emu, uc);
emu->instr.opecode = *(uint8_t *)uc->uc_mcontext.rip;
uint8_t *pc = (uint8_t *)uc->uc_mcontext.rip;
uint32_t imm32 = *pc + (*(pc + 1) << 8) + (*(pc + 1) << 16) + (*(pc + 1) << 24);
modrm.SetR32(imm32);
uc->uc_mcontext.rip = uc->uc_mcontext.rip + 4;
}
void push_r32(Emulator *emu, sig_ucontext_t* uc){
uint8_t * pc = (uint8_t *)uc->uc_mcontext.rip;
uint8_t reg = *pc & ((1<<3)-1);
emu->memory[emu->ESP] = emu->GetRegister32(reg);
emu->ESP = emu->ESP - 4;
uc->uc_mcontext.rip++;
}
void pop_r32(Emulator *emu, sig_ucontext_t* uc){
uint8_t *pc = (uint8_t *)uc->uc_mcontext.rip;
uint8_t reg = *pc & ((1<<3)-1);
emu->SetRegister32(reg, emu->memory[emu->ESP]);
emu->ESP = emu->ESP + 4;
uc->uc_mcontext.rip++;
}
void mov_rm32_imm32(Emulator *emu, sig_ucontext_t* uc){
uc->uc_mcontext.rip++;
ModRM modrm(emu, uc);
emu->instr.opecode = *(uint8_t *)uc->uc_mcontext.rip;
uint8_t *pc = (uint8_t *)uc->uc_mcontext.rip;
uint32_t imm32 = *pc + (*(pc + 1) << 8) + (*(pc + 1) << 16) + (*(pc + 1) << 24);
modrm.SetRM32(imm32);
uc->uc_mcontext.rip = uc->uc_mcontext.rip + 4;
}
void nop(Emulator *emu, sig_ucontext_t* uc){
uc->uc_mcontext.rip++;
}
void mov_al_moffs8(Emulator *emu, sig_ucontext_t* uc){
uc->uc_mcontext.rip++;
uint8_t moffs =
uc->uc_mcontext.rip = uc->uc_mcontext.rip + 4;
}
/*
void mov_al_moffs8(Emulator *emu) {
emu->EIP++;
uint8_t moffs = emu->memory[emu->sgregs[1].base + emu->GetSignCode32(0)];
emu->AL = moffs;
emu->EAX = (emu->EAX & ~0xff) | emu->AL;
emu->EIP += 4;
}*/
void mov_rm32_r32(Emulator *emu, sig_ucontext_t* uc){ //cout<<"mov2"<<endl;
uc->uc_mcontext.rip++;
emu->instr.opecode = *(uint8_t *)uc->uc_mcontext.rip;
ModRM modrm(emu, uc);
uint32_t r32 = modrm.GetR32();
modrm.SetRM32(r32);
}
/*
void ltr_rm16(Emulator *emu, ModRM *modrm){
uint16_t rm16 = modrm->GetRM16();
emu->SetTR(rm16);
}
void lgdt_m32(Emulator *emu, ModRM *modrm) {
uint32_t m48 = modrm->get_m();
uint16_t limit = emu->GetMemory16(m48);
uint32_t base = emu->GetMemory32(m48 + 2);
emu->set_gdtr(base, limit);
}
void lidt_m32(Emulator *emu, ModRM *modrm) {
uint32_t m48 = modrm->get_m();
uint16_t limit = emu->GetMemory16(m48);
uint32_t base = emu->GetMemory32(m48 + 2);
emu->set_idtr(base, limit);
}
void push_es(Emulator *emu){
emu->Push32(emu->get_ES());
emu->EIP++;
}
void pop_es(Emulator *emu){
emu->set_ES(emu->Pop32());
emu->EIP++;
}
void push_ss(Emulator *emu){
emu->Push32(emu->get_SS());
emu->EIP++;
}
void pop_ss(Emulator *emu){
emu->set_SS(emu->Pop32());
emu->EIP++;
}
void push_ds(Emulator *emu){
emu->Push32(emu->get_DS());
emu->EIP++;
}
void pop_ds(Emulator *emu){
emu->set_DS(emu->Pop32());
emu->EIP++;
}
void add_rm32_r32(Emulator *emu){
emu->EIP++;
ModRM modrm(emu);
uint32_t rm32 = modrm.GetRM32();
uint32_t r32 = modrm.GetR32();
modrm.SetRM32(rm32 + r32);
emu->update_eflags_add(rm32, r32);
}
void add_r32_rm32(Emulator *emu){
emu->EIP++;
ModRM modrm(emu);
uint32_t r32 = modrm.GetR32();
uint32_t rm32 = modrm.GetRM32();
modrm.SetR32(rm32 + r32);
emu->update_eflags_add(r32, rm32);
}
void add_eax_imm32(Emulator *emu){
uint32_t imm32 = emu->GetSignCode32(1);
uint32_t eax = emu->EAX;
emu->EAX = eax + imm32;
emu->EIP += 5;
emu->update_eflags_add(eax, imm32);
}
void add_rm32_imm32(Emulator *emu, ModRM *modrm){
uint32_t rm32 = modrm->GetRM32();
uint32_t imm32 = (int32_t)emu->GetSignCode32(0);
emu->EIP += 4;
modrm->SetRM32(rm32 + imm32);
emu->update_eflags_add(rm32, imm32);
}
//void add_al_imm8(Emulator *emu){
// uint8_t al = emu->AL;
// uint8_t imm8 = emu->GetSignCode8(1);
// emu->AL = al + imm8;
//}
void dec_r32(Emulator *emu){
uint8_t reg = emu->GetSignCode8(0) & ((1<<3)-1);
uint32_t r32 = emu->reg[reg].reg32;
emu->reg[reg].reg32 = r32 - 1;
emu->EIP++;
emu->update_eflags_sub(r32, 1);
}
void mov_rm8_r8(Emulator *emu){
emu->EIP++;
ModRM modrm(emu);
uint8_t r8 = modrm.GetR8();
modrm.SetRM8(r8);
}
void mov_r8_imm8(Emulator *emu){
uint8_t reg = emu->GetCode8(0) - 0xB0;
emu->reg[reg].reg32 = emu->GetCode8(1);
emu->EIP += 2;
// std::cout<<"a";
}
void mov_r32_imm32(Emulator *emu){
uint8_t reg = emu->GetCode8(0) - 0xB8;
uint32_t val = emu->GetCode32(1);
printf("reg %x \n", val);
emu->reg[reg].reg32 = val;
emu->EIP += 5;
}
void mov_rm8_imm8(Emulator *emu){
emu->EIP++;
ModRM modrm(emu);
uint8_t val = emu->GetCode8(0);
modrm.SetRM8(val);
emu->EIP++;
}
void mov_r8_rm8(Emulator *emu){// cout<<"mov_r8_rm8"<<endl;
emu->EIP++;
ModRM modrm(emu);
uint8_t rm8 = modrm.GetRM8();
modrm.SetR8(rm8);
}
void out_dx_al(Emulator *emu){
emu->io_out8(emu->DX, emu->AL);
emu->EIP++;
}
void sti(Emulator *emu){
emu->set_interrupt(true);
emu->EIP++;
}
void inc_r32(Emulator *emu){
uint8_t reg = emu->GetCode8(0) - 0x40;
emu->reg[reg].reg32++;
emu->EIP++;
}
void lea_r32_m32(Emulator *emu){
emu->EIP++;
ModRM modrm(emu);
uint32_t m32 = modrm.get_m();
modrm.SetR32(m32);
}
void add_rm32_imm8(Emulator *emu, ModRM *modrm){
uint32_t rm32 = modrm->GetRM32();
int32_t imm8 = (int32_t)emu->GetSignCode8(0);
if(imm8 >= 0x80){
imm8 -= 0x100;
}
emu->EIP++;
modrm->SetRM32(rm32 + imm8);
emu->update_eflags_add(rm32, imm8);
}
void short_jump(Emulator *emu){
uint32_t diff = emu->GetSignCode8(1);
emu->EIP += diff + 2;
}
void near_jump(Emulator *emu){
int32_t diff = emu->GetSignCode32(1);
emu->EIP += (diff + 5);
}
void mov_moffs32_eax(Emulator *emu){
emu->EIP++;
uint32_t moffs = emu->GetSignCode32(0);
emu->SetMemory32(moffs, emu->EAX);
emu->EIP += 4;
}
void in_al_dx(Emulator *emu){
uint16_t dx = emu->DX;
emu->AL = emu->in_io8(dx);
emu->EAX = (emu->EAX & ~0xff) | emu->AL;
emu->EIP++;
}
void pushfd(Emulator *emu){
emu->Push32(emu->get_eflags());
emu->EIP++;
}
void sub_rm32_imm32(Emulator *emu, ModRM *modrm){
uint32_t rm32 = modrm->GetRM32();
uint32_t imm32 = (int32_t)emu->GetSignCode32(0);
emu->EIP += 4;
modrm->SetRM32(rm32 - imm32);
emu->update_eflags_sub(rm32, imm32);
}
void push_imm32(Emulator *emu) {
uint32_t imm32 = (int32_t)emu->GetSignCode32(1);
emu->Push32(imm32);
emu->EIP += 5;
}
void sub_rm32_imm8(Emulator *emu, ModRM *modrm){
uint32_t rm32 = modrm->GetRM32();
int32_t imm8 = (int32_t)emu->GetSignCode8(0);
if(imm8 >= 0x80){
imm8 -= 0x100;
}
emu->EIP++;
modrm->SetRM32(rm32 - imm8);
emu->update_eflags_sub(rm32, imm8);
}
void sub_rm32_r32(Emulator *emu){
emu->EIP++;
ModRM modrm(emu);
uint32_t rm32 = modrm.GetRM32();
uint32_t r32 = modrm.GetR32();
modrm.SetRM32(rm32 - r32);
emu->update_eflags_sub(rm32, r32);
}
void sub_r32_rm32(Emulator *emu){
emu->EIP++;
ModRM modrm(emu);
uint32_t r32 = modrm.GetR32();
uint32_t rm32 = modrm.GetRM32();
modrm.SetR32(rm32 - r32);
emu->update_eflags_sub(r32, rm32);
}
void sub_eax_imm32(Emulator *emu) {
uint32_t imm32 = emu->GetSignCode32(1); uint32_t eax = emu->reg[0].reg32;
emu->reg[0].reg32 = emu->reg[0].reg32 - imm32;
emu->EIP += 5;
emu->update_eflags_sub(eax , imm32);
}
void xor_rm32_r32(Emulator *emu) {
emu->EIP++;
ModRM modrm(emu);
uint32_t rm32 = modrm.GetRM32();
uint32_t r32 = modrm.GetR32();
modrm.SetRM32(r32 ^ rm32);
emu->UpdateXor();
}
void xor_r32_rm32(Emulator *emu) {
emu->EIP++;
ModRM modrm(emu);
uint32_t r32 = modrm.GetR32();
uint32_t rm32 = modrm.GetRM32();
modrm.SetR32(r32 ^ rm32);
emu->UpdateXor();
}
void xor_rm32_imm32(Emulator *emu, ModRM *modrm) {
uint32_t rm32 = modrm->GetRM32();
uint32_t imm32 = emu->GetSignCode32(0);
emu->EIP += 4;
modrm->SetRM32(imm32 ^ rm32);
emu->UpdateXor();
}
void xor_rm32_imm8(Emulator *emu, ModRM *modrm) {
uint32_t rm32 = modrm->GetRM32();
int32_t imm8 = (int32_t)emu->GetSignCode8(0);
if(imm8 >= 0x80){
imm8 -= 0x100;
}
emu->EIP++;
modrm->SetRM32(imm8 ^ rm32);
emu->UpdateXor();
}
void xor_eax_imm32(Emulator *emu) {
emu->reg[0].reg32 = emu->reg[0].reg32 ^ emu->GetSignCode32(1);
emu->EIP += 5;
emu->UpdateXor();
}
void or_rm32_imm32(Emulator *emu, ModRM *modrm) {
uint32_t rm32 = modrm->GetRM32();
uint8_t imm32 = emu->GetSignCode32(0);
emu->EIP += 4;
modrm->SetRM32(imm32 | rm32);
emu->UpdateOr();
}
void or_rm32_imm8(Emulator *emu, ModRM *modrm) {
uint32_t rm32 = modrm->GetRM32();
int32_t imm8 = (int32_t)emu->GetSignCode8(0);
if(imm8 >= 0x80){
imm8 -= 0x100;
}
emu->EIP += 1;
modrm->SetRM32(imm8 | rm32);
emu->UpdateOr();
}
void or_rm32_r32(Emulator *emu) {
emu->EIP++;
ModRM modrm(emu);
uint32_t rm32 = modrm.GetRM32();
uint32_t r32 = modrm.GetR32();
modrm.SetRM32(r32 | rm32);
emu->UpdateOr();
}
void or_r32_rm32(Emulator *emu) {
emu->EIP++;
ModRM modrm(emu);
uint32_t r32 = modrm.GetR32();
uint32_t rm32 = modrm.GetRM32();
modrm.SetR32(r32 | rm32);
emu->UpdateOr();
}
void or_eax_imm32(Emulator *emu) {
emu->reg[0].reg32 = emu->reg[0].reg32 | emu->GetSignCode32(1);
emu->EIP += 5;
emu->UpdateOr();
}
void cmp_rm32_imm32(Emulator *emu, ModRM *modrm){
uint32_t rm32= modrm->GetRM32();
uint32_t imm32 = emu->GetCode32(0);
emu->update_eflags_sub(rm32, imm32);
emu->EIP += 4;
}
void cmp_rm32_imm8(Emulator *emu, ModRM *modrm){
uint32_t rm32= modrm->GetRM32();
int32_t imm8 = (int32_t)emu->GetCode8(0);
if(imm8 >= 0x80){
imm8 -= 0x100;
}
emu->update_eflags_sub(rm32, imm8);
emu->EIP++;
}
void shl_rm32_imm8(Emulator *emu, ModRM *modrm){
uint32_t rm32 = modrm->GetRM32();
uint32_t imm8 = emu->GetCode8(0);
modrm->SetRM32(rm32<<imm8);
emu->update_eflags_shl(rm32, imm8);
emu->EIP++;
}
void shl_rm32_cl(Emulator *emu, ModRM *modrm){
uint32_t rm32 = modrm->GetRM32();
uint8_t cl = emu->get_CL();
modrm->SetRM32(rm32<<cl);
emu->update_eflags_shl(rm32, cl);
}
void shr_rm32_imm8(Emulator *emu, ModRM *modrm){
uint32_t rm32 = modrm->GetRM32();
uint32_t imm8 = emu->GetCode8(0);
modrm->SetRM32(rm32>>imm8);
emu->EIP++;
emu->update_eflags_shr(rm32, imm8);
}
void shr_rm32_cl(Emulator *emu, ModRM *modrm){
uint32_t rm32 = modrm->GetRM32();
uint8_t cl = emu->get_CL();
modrm->SetRM32(rm32>>cl);
emu->update_eflags_shr(rm32, cl);
}
void sal_rm32_imm8(Emulator *emu, ModRM *modrm){
uint32_t rm32 = modrm->GetRM32();
uint32_t imm8 = emu->GetCode8(0);
modrm->SetRM32(rm32<<imm8);
//emu->update_eflags_shr(rm32, imm8);
}
void sal_rm32_cl(Emulator *emu, ModRM *modrm){
uint32_t rm32 = modrm->GetRM32();
uint8_t cl = emu->get_CL();
modrm->SetRM32(rm32<<cl);
//emu->update_eflags_shr(rm32, cl);
}
void sar_rm32_imm8(Emulator *emu, ModRM *modrm){
int32_t rm32 = modrm->GetRM32();
int32_t imm8 = emu->GetCode8(0);
modrm->SetRM32(rm32>>imm8);
emu->EIP++;
//emu->update_eflags_shr(rm32, imm8);
}
void sar_rm32_cl(Emulator *emu, ModRM *modrm){
uint32_t rm32 = modrm->GetRM32();
uint8_t cl = emu->get_CL();
modrm->SetRM32(rm32>>cl);
//emu->update_eflags_shr(rm32, cl);
}
void sar_rm8_imm8(Emulator *emu, ModRM *modrm){
int8_t rm8_s = modrm->GetRM8();
uint8_t imm8 = emu->GetSignCode8(0);
modrm->SetRM8(rm8_s>>imm8);
emu->EIP += 1;
}
void shr_rm8_imm8(Emulator *emu, ModRM *modrm){
uint8_t rm8_s = modrm->GetRM8();
uint8_t imm8 = emu->GetSignCode8(0);
modrm->SetRM8(rm8_s>>imm8);
emu->EIP += 1;
}
void and_rm32_imm8(Emulator *emu, ModRM *modrm) {
uint32_t rm32 = modrm->GetRM32();
int32_t imm8 = (int32_t)emu->GetSignCode8(0);
if(imm8 >= 0x80){
imm8 -= 0x100;
}
modrm->SetRM32(rm32&imm8);
emu->EIP++;
}
void cmp_rm8_imm8(Emulator *emu, ModRM *modrm) {
uint8_t rm8 = modrm->GetRM8();
uint8_t imm8 = emu->GetSignCode8(0);
emu->update_eflags_sub(rm8, imm8);
emu->EIP++;
}
void movzs_r32_rm8(Emulator *emu){
emu->EIP++;
ModRM *modrm = new ModRM(emu);
uint8_t rm8 = modrm->GetRM8();
modrm->SetR32(rm8);
}
void idiv_edx_eax_rm32(Emulator *emu, ModRM *modrm){
int32_t rm32_s = modrm->GetRM32();
int64_t val_s = emu->EDX;
val_s <<= 32;
val_s |= emu->EAX;
emu->EAX = val_s/rm32_s;
emu->EDX = val_s%rm32_s;
}
void test_rm8_imm8(Emulator *emu, ModRM *modrm){
uint8_t rm8 = modrm->GetRM8();
uint8_t imm8 = emu->GetCode8(0);
emu->EIP++;
emu->update_eflags_and(rm8, imm8);
}
void and_rm32_imm32(Emulator *emu, ModRM *modrm){
uint32_t rm32 = modrm->GetRM32();
uint32_t imm32 = emu->GetCode32(0);
modrm->SetRM32(rm32&imm32);
emu->update_eflags_add(rm32, imm32);
emu->EIP += 4;
}
void cmp_al_imm8(Emulator *emu){
uint8_t al = emu->AL;
uint8_t imm8 = emu->GetCode8(1);
emu->update_eflags_sub(al, imm8);
emu->EIP += 2;
}
void test_rm32_imm32(Emulator *emu, ModRM *modrm){
uint32_t rm32 = modrm->GetRM32();
uint32_t imm32 = emu->GetCode32(0);
emu->update_eflags_and(rm32, imm32);
emu->EIP += 4;
}
void code_f6(Emulator *emu){
emu->EIP++;
ModRM *modrm = new ModRM(emu);
switch(emu->instr.opecode){
case 0: test_rm8_imm8(emu, modrm); break;
default:
cout<<"not implemented: f6 "<<(uint32_t)emu->instr.opecode<<endl;
}
delete modrm;
}
void code_f7(Emulator *emu){
emu->EIP++;
ModRM *modrm = new ModRM(emu);
switch(emu->instr.opecode){
case 0: test_rm32_imm32(emu, modrm); break;
case 7: idiv_edx_eax_rm32(emu, modrm); break;
default:
cout<<"not implemented: f7 "<<(uint32_t)emu->instr.opecode<<endl;
}
delete modrm;
}
void code_80(Emulator *emu){
emu->EIP++;
ModRM *modrm = new ModRM(emu);
switch(emu->instr.opecode){
case 7: cmp_rm8_imm8(emu, modrm); break;
default:
cout<<"not implemented: 80 "<<(uint32_t)emu->instr.opecode<<endl;
}
delete modrm;
}
void code_81(Emulator *emu){
emu->EIP++;
ModRM *modrm = new ModRM(emu);
switch(emu->instr.opecode){
case 0: add_rm32_imm32(emu, modrm); break;
case 1: or_rm32_imm32(emu, modrm); break;
case 4: and_rm32_imm32(emu, modrm); break;
case 5: sub_rm32_imm32(emu, modrm); break;
case 6: xor_rm32_imm32(emu, modrm); break;
case 7: cmp_rm32_imm32(emu, modrm); break;
default:
cout<<"not implemented: 81 "<<(uint32_t)emu->instr.opecode<<endl;
}
delete modrm;
}
void code_83(Emulator *emu){
emu->EIP++;
ModRM *modrm = new ModRM(emu);
printf("REG :%x \n", emu->instr.opecode);
switch(emu->instr.opecode){
case 0: add_rm32_imm8(emu, modrm); break;
case 1: or_rm32_imm8(emu, modrm); break;
case 4: and_rm32_imm8(emu, modrm); break;
case 5: sub_rm32_imm8(emu, modrm); break;
case 6: xor_rm32_imm8(emu, modrm); break;
case 7: cmp_rm32_imm8(emu, modrm); break;
default:
cout<<"not implemented: 83 "<<(uint32_t)emu->instr.opecode<<endl;
}
delete modrm;
}
void code_c0(Emulator *emu){
emu->EIP++;
ModRM *modrm = new ModRM(emu);
switch(emu->instr.opecode){
case 5: shr_rm8_imm8(emu, modrm); break;
case 7: sar_rm8_imm8(emu, modrm); break;
default:
cout<<"not implemented: c0 "<<(uint32_t)emu->instr.opecode<<endl;
}
delete modrm;
}
void code_0f00(Emulator *emu){
emu->EIP++;
ModRM *modrm = new ModRM(emu);
switch(emu->instr.opecode){
case 3: ltr_rm16(emu, modrm); break;
default:
cout<<"not implemented: 0f00 "<<(uint32_t)emu->instr.opecode<<endl;
}
delete modrm;
}
void code_c1(Emulator *emu){
emu->EIP++;
ModRM *modrm = new ModRM(emu);
cout<<"opecode "<<(uint32_t)emu->instr.opecode<<endl;
switch(emu->instr.opecode){
case 4: shl_rm32_imm8(emu, modrm); break;
case 5: shr_rm32_imm8(emu, modrm); break;
case 6: sal_rm32_imm8(emu, modrm); break;
case 7: sar_rm32_imm8(emu, modrm); break;
default:
cout<<"not implemented: c1 "<<(uint32_t)emu->instr.opecode<<endl;
}
delete modrm;
}
void code_d3(Emulator *emu){
emu->EIP++;
ModRM *modrm = new ModRM(emu);
switch(emu->instr.opecode){
case 4: shl_rm32_cl(emu, modrm); break;
case 5: shr_rm32_cl(emu, modrm); break;
case 6: sal_rm32_cl(emu, modrm); break;
case 7: sar_rm32_cl(emu, modrm); break;
default:
cout<<"not implemented: d3 "<<(uint32_t)emu->instr.opecode<<endl;
}
delete modrm;
}
void code_0f01(Emulator *emu){
emu->EIP++;
ModRM *modrm = new ModRM(emu);
switch(emu->instr.opecode){
case 2: lgdt_m32(emu, modrm); break;
case 3: lidt_m32(emu, modrm); break;
default:
cout<<"not implemented: 0f01 "<<(uint32_t)emu->instr.opecode<<endl;
}
delete modrm;
}
void push_imm8(Emulator *emu){
uint32_t val = emu->GetCode8(1);
printf("val %x \n", val);
emu->Push32(val);
emu->EIP += 2;
}
void inc_rm32(Emulator *emu, ModRM *modrm){
uint32_t val = modrm->GetRM32();
modrm->SetRM32(val + 1);
}
void push_rm32(Emulator *emu, ModRM *modrm){
emu->Push32(modrm->GetRM32());
}
void dec_rm32(Emulator *emu, ModRM *modrm){
uint32_t val = modrm->GetRM32();
modrm->SetRM32(val - 1);
emu->update_eflags_sub(val, 1);
}
void task_switch(Emulator *emu, uint16_t cs) {
TSS oldTSS, newTSS;
uint32_t prev = emu->dtregs[TR].selector;
uint32_t base = emu->dtregs[TR].base_addr;
emu->read_data(&oldTSS, base, sizeof(TSS));//
oldTSS.eflags = emu->get_eflags();
oldTSS.eip = emu->EIP;
oldTSS.eax = emu->EAX;
oldTSS.ecx = emu->ECX;
oldTSS.edx = emu->EDX;
oldTSS.ebx = emu->EBX;
oldTSS.esp = emu->ESP;
oldTSS.ebp = emu->EBP;
oldTSS.esi = emu->ESI;
oldTSS.edi = emu->EDI;
oldTSS.es = emu->sreg[0].sreg;
oldTSS.cs = emu->sreg[1].sreg;
oldTSS.ss = emu->sreg[2].sreg;
oldTSS.ds = emu->sreg[3].sreg;
oldTSS.fs = emu->sreg[4].sreg;
oldTSS.gs = emu->sreg[5].sreg;
emu->write_data(base, &oldTSS, sizeof(TSS));
emu->SetTR(cs);
base = emu->dtregs[TR].base_addr;
emu->read_data(&newTSS, base, sizeof(TSS));//
newTSS.prev_sel = prev;
emu->write_data(base, &newTSS, sizeof(TSS));
emu->set_eflags(newTSS.eflags);
emu->EIP = newTSS.eip;
emu->EAX = newTSS.eax;
emu->ECX = newTSS.ecx;
emu->EDX = newTSS.edx;
emu->EBX = newTSS.ebx;
emu->ESP = newTSS.esp;
emu->EBP = newTSS.ebp;
emu->ESI = newTSS.esi;
emu->EDI = newTSS.edi;
emu->sreg[0].sreg = newTSS.es;
emu->sreg[1].sreg = newTSS.cs;
emu->sreg[2].sreg = newTSS.ss;
emu->sreg[3].sreg = newTSS.ds;
emu->sreg[4].sreg = newTSS.fs;
emu->sreg[5].sreg = newTSS.gs;
emu->set_ldtr(newTSS.ldtr);
}
void farjump(Emulator *emu, ModRM *modrm){
uint32_t m48 = modrm->get_m();
uint32_t eip = emu->GetMemory32(m48);
uint16_t cs = emu->GetMemory16(m48 + 4);
cs = cs & 0xfffc;
if (cs == 0) {
emu->EIP = 0;
}
uint16_t bit = (cs >> 2) & 1;
if ( bit == 0){
}else if (bit == 1) {
emu->EIP = 0;
//LDT
}
uint32_t smtype = emu->memory[emu->dtregs[GDTR].base_addr + cs + 5] & 0x9f;
switch(smtype) {
case 0x89:
case 0x8b:
task_switch(emu, cs);
break;
case 0x98:
case 0x99:
case 0x9a:
case 0x9b:
case 0x9c:
case 0x9d:
case 0x9e:
case 0x9f:
emu->EIP = eip;
emu->sreg[1].sreg = cs;
break;
}
}
void iret(Emulator *emu){
Register eflags;
uint16_t cs;
emu->EIP = emu->Pop32();
cs = emu->Pop32();
eflags.reg32 = emu->Pop32();
emu->set_eflags(eflags.reg32);
if(eflags.NT){
uint32_t base;
TSS tss;
base = emu->dtregs[TR].base_addr;
emu->read_data(&tss, base, sizeof(TSS));
task_switch(emu, tss.prev_sel);
}
else{
uint32_t esp;
uint16_t ss;
esp = emu->Pop32();
ss = emu->Pop32();
emu->ESP = esp;
emu->sreg[2].sreg = ss;
}
emu->sreg[1].sreg = cs;
}
void code_ff(Emulator *emu){
emu->EIP++;
ModRM *modrm = new ModRM(emu);
switch(emu->instr.opecode){
case 0: inc_rm32(emu, modrm); break;
case 1: dec_rm32(emu, modrm); break;
case 5: farjump(emu, modrm); break;
case 6: push_rm32(emu, modrm);break;
default:
cout<<"not implemented: 0xFF /"<<(int)emu->instr.opecode<<endl;
}
delete modrm;
}
void movsx_r32_rm8(Emulator *emu){
emu->EIP++;
ModRM modrm(emu);
int8_t rm8_s = modrm.GetRM8();
modrm.SetR32(rm8_s);
}
void call_rel32(Emulator *emu){
int32_t diff = emu->GetSignCode32(1);
printf("%x \n", emu->EIP);
emu->Push32(emu->EIP + 5); //call命令は全体で5バイト
emu->EIP += (diff + 5);
}
void ret(Emulator *emu){// cout<<"ret"<<endl;
emu->EIP = emu->Pop32();
printf("%x \n", emu->EIP);
}
void leave(Emulator *emu){
// uint32_t ebp = EBP;
emu->ESP = emu->EBP;
emu->EBP = emu->Pop32();
emu->EIP++;
}
void pushad(Emulator *emu) {
uint32_t esp;
esp = emu->ESP;
emu->Push32(emu->EAX);
emu->Push32(emu->ECX);
emu->Push32(emu->EDX);
emu->Push32(emu->EBX);
emu->Push32(esp);
emu->Push32(emu->EBP);
emu->Push32(emu->ESI);
emu->Push32(emu->EDI);
emu->EIP++;
}
void popad(Emulator *emu) {
uint32_t esp;
emu->EDI = emu->Pop32();
emu->ESI = emu->Pop32();
emu->EBP = emu->Pop32();
esp = emu->Pop32();
emu->EBX = emu->Pop32();
emu->EDX = emu->Pop32();
emu->ECX = emu->Pop32();
emu->EAX = emu->Pop32();
emu->ESP = esp;
emu->EIP++;
}
void jc(Emulator *emu){
int diff = emu->IsCarry() ? emu->GetSignCode8(1) : 0;
emu->EIP += (diff + 2);
}
void jz_rel8(Emulator *emu){
int diff = emu->IsZero() ? emu->GetSignCode8(1) : 0;
emu->EIP += (diff + 2);
}
void jz_rel32(Emulator *emu){
int diff = emu->IsZero() ? emu->GetSignCode32(1) : 0;
emu->EIP += (diff + 5);
}
void js(Emulator *emu){
int diff = emu->IsSign() ? emu->GetSignCode8(1) : 0;
emu->EIP += (diff + 2);
}
void jo(Emulator *emu){
int diff = emu->IsOverflow() ? emu->GetSignCode8(1) : 0;
emu->EIP += (diff + 2);
}
void jnc(Emulator *emu){
int diff = !emu->IsCarry() ? emu->GetSignCode8(1) : 0;
emu->EIP += (diff + 2);
}
void jnz(Emulator *emu){
int diff = !emu->IsZero() ? emu->GetSignCode8(1) : 0;
emu->EIP += (diff + 2);
}
void jns(Emulator *emu){
int diff = !emu->IsSign() ? emu->GetSignCode8(1) : 0;
emu->EIP += (diff + 2);
}
void jno(Emulator *emu){
int diff = !emu->IsOverflow() ? emu->GetSignCode8(1) : 0;
emu->EIP += (diff + 2);
}
void jbe(Emulator *emu){
int diff = emu->IsCarry() || emu->IsZero() ? emu->GetSignCode8(1) : 0;
emu->EIP += (diff + 2);
}
void jnl(Emulator *emu){
int diff = emu->IsSign() == emu->IsOverflow() ? emu->GetSignCode8(1) : 0;
emu->EIP += (diff + 2);