diff options
Diffstat (limited to 'ioq3-r437/src/qcommon/vm_x86.c')
| -rw-r--r-- | ioq3-r437/src/qcommon/vm_x86.c | 1207 |
1 files changed, 0 insertions, 1207 deletions
diff --git a/ioq3-r437/src/qcommon/vm_x86.c b/ioq3-r437/src/qcommon/vm_x86.c deleted file mode 100644 index 38593c6b..00000000 --- a/ioq3-r437/src/qcommon/vm_x86.c +++ /dev/null @@ -1,1207 +0,0 @@ -/* -=========================================================================== -Copyright (C) 1999-2005 Id Software, Inc. - -This file is part of Quake III Arena source code. - -Quake III Arena source code is free software; you can redistribute it -and/or modify it under the terms of the GNU General Public License as -published by the Free Software Foundation; either version 2 of the License, -or (at your option) any later version. - -Quake III Arena source code 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 General Public License for more details. - -You should have received a copy of the GNU General Public License -along with Quake III Arena source code; if not, write to the Free Software -Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -=========================================================================== -*/ -// vm_x86.c -- load time compiler and execution environment for x86 - -#include "vm_local.h" - -#ifdef __FreeBSD__ // rb0101023 -#include <sys/types.h> -#endif - -#ifndef _WIN32 -#include <sys/mman.h> // for PROT_ stuff -#endif - -/* - - eax scratch - ebx scratch - ecx scratch (required for shifts) - edx scratch (required for divisions) - esi program stack - edi opstack - -*/ - -// TTimo: initialised the statics, this fixes a crash when entering a compiled VM -static byte *buf = NULL; -static byte *jused = NULL; -static int compiledOfs = 0; -static byte *code = NULL; -static int pc = 0; - -static int *instructionPointers = NULL; - -#define FTOL_PTR - -#ifdef _MSC_VER - -#if defined( FTOL_PTR ) -int _ftol( float ); -static int ftolPtr = (int)_ftol; -#endif - -void AsmCall( void ); -static int asmCallPtr = (int)AsmCall; - -#else // _MSC_VER - -#if defined( FTOL_PTR ) -// bk001213 - BEWARE: does not work! UI menu etc. broken - stack! -// bk001119 - added: int gftol( float x ) { return (int)x; } - -int qftol( void ); // bk001213 - label, see unix/ftol.nasm -int qftol027F( void ); // bk001215 - fixed FPU control variants -int qftol037F( void ); -int qftol0E7F( void ); // bk010102 - fixed bogus bits (duh) -int qftol0F7F( void ); - - -static int ftolPtr = (int)qftol0F7F; -#endif // FTOL_PTR - -void doAsmCall( void ); -static int asmCallPtr = (int)doAsmCall; -#endif - - -static int callMask = 0; // bk001213 - init - -static int instruction, pass; -static int lastConst = 0; -static int oc0, oc1, pop0, pop1; - -typedef enum -{ - LAST_COMMAND_NONE = 0, - LAST_COMMAND_MOV_EDI_EAX, - LAST_COMMAND_SUB_DI_4, - LAST_COMMAND_SUB_DI_8, -} ELastCommand; - -static ELastCommand LastCommand; - -/* -================= -AsmCall -================= -*/ -#ifdef _MSC_VER -__declspec( naked ) void AsmCall( void ) { -int programStack; -int *opStack; -int syscallNum; -vm_t* savedVM; - -__asm { - mov eax, dword ptr [edi] - sub edi, 4 - or eax,eax - jl systemCall - // calling another vm function - shl eax,2 - add eax, dword ptr [instructionPointers] - call dword ptr [eax] - mov eax, dword ptr [edi] - and eax, [callMask] - ret -systemCall: - - // convert negative num to system call number - // and store right before the first arg - neg eax - dec eax - - push ebp - mov ebp, esp - sub esp, __LOCAL_SIZE - - mov dword ptr syscallNum, eax // so C code can get at it - mov dword ptr programStack, esi // so C code can get at it - mov dword ptr opStack, edi - - push ecx - push esi // we may call recursively, so the - push edi // statics aren't guaranteed to be around -} - - savedVM = currentVM; - - // save the stack to allow recursive VM entry - currentVM->programStack = programStack - 4; - *(int *)((byte *)currentVM->dataBase + programStack + 4) = syscallNum; -//VM_LogSyscalls( (int *)((byte *)currentVM->dataBase + programStack + 4) ); - *(opStack+1) = currentVM->systemCall( (int *)((byte *)currentVM->dataBase + programStack + 4) ); - - currentVM = savedVM; - -_asm { - pop edi - pop esi - pop ecx - add edi, 4 // we added the return value - - mov esp, ebp - pop ebp - - ret -} - -} - -#else //!_MSC_VER - -#ifdef __MINGW32__ // _ is prepended to compiled symbols -#define CMANG(sym) "_"#sym -#else -#define CMANG(sym) #sym -#endif - -static int callProgramStack; -static int *callOpStack; -static int callSyscallNum; - -void callAsmCall(void) -{ - vm_t *savedVM; - int *callOpStack2; - - savedVM = currentVM; - callOpStack2 = callOpStack; - - // save the stack to allow recursive VM entry - currentVM->programStack = callProgramStack - 4; - *(int *)((byte *)currentVM->dataBase + callProgramStack + 4) = callSyscallNum; - //VM_LogSyscalls((int *)((byte *)currentVM->dataBase + callProgramStack + 4) ); - *(callOpStack2+1) = currentVM->systemCall( (long *)((byte *)currentVM->dataBase + callProgramStack + 4) ); - - currentVM = savedVM; -} - -// Note the C space function AsmCall is never actually called, and is in fact -// arbitrarily named (though this is not true for the MSC version). When a vm -// makes a system call, control jumps straight to the doAsmCall label. -void AsmCall( void ) { - asm( CMANG(doAsmCall) ": \n\t" \ - " movl (%%edi),%%eax \n\t" \ - " subl $4,%%edi \n\t" \ - " orl %%eax,%%eax \n\t" \ - " jl systemCall \n\t" \ - " shll $2,%%eax \n\t" \ - " addl %3,%%eax \n\t" \ - " call *(%%eax) \n\t" \ - " movl (%%edi),%%eax \n\t" \ - " andl " CMANG(callMask) ", %%eax \n\t" \ - " jmp doret \n\t" \ - "systemCall: \n\t" \ - " negl %%eax \n\t" \ - " decl %%eax \n\t" \ - " movl %%eax,%0 \n\t" \ - " movl %%esi,%1 \n\t" \ - " movl %%edi,%2 \n\t" \ - " pushl %%ecx \n\t" \ - " pushl %%esi \n\t" \ - " pushl %%edi \n\t" \ - " call " CMANG(callAsmCall) " \n\t" \ - " popl %%edi \n\t" \ - " popl %%esi \n\t" \ - " popl %%ecx \n\t" \ - " addl $4,%%edi \n\t" \ - "doret: \n\t" \ - " ret \n\t" \ - : "=rm" (callSyscallNum), "=rm" (callProgramStack), "=rm" (callOpStack) \ - : "rm" (instructionPointers) \ - : "ax", "di", "si", "cx" \ - ); -} -#endif - -static int Constant4( void ) { - int v; - - v = code[pc] | (code[pc+1]<<8) | (code[pc+2]<<16) | (code[pc+3]<<24); - pc += 4; - return v; -} - -static int Constant1( void ) { - int v; - - v = code[pc]; - pc += 1; - return v; -} - -static void Emit1( int v ) -{ - buf[ compiledOfs ] = v; - compiledOfs++; - - LastCommand = LAST_COMMAND_NONE; -} - -#if 0 -static void Emit2( int v ) { - Emit1( v & 255 ); - Emit1( ( v >> 8 ) & 255 ); -} -#endif - -static void Emit4( int v ) { - Emit1( v & 255 ); - Emit1( ( v >> 8 ) & 255 ); - Emit1( ( v >> 16 ) & 255 ); - Emit1( ( v >> 24 ) & 255 ); -} - -static int Hex( int c ) { - if ( c >= 'a' && c <= 'f' ) { - return 10 + c - 'a'; - } - if ( c >= 'A' && c <= 'F' ) { - return 10 + c - 'A'; - } - if ( c >= '0' && c <= '9' ) { - return c - '0'; - } - - Com_Error( ERR_DROP, "Hex: bad char '%c'", c ); - - return 0; -} -static void EmitString( const char *string ) { - int c1, c2; - int v; - - while ( 1 ) { - c1 = string[0]; - c2 = string[1]; - - v = ( Hex( c1 ) << 4 ) | Hex( c2 ); - Emit1( v ); - - if ( !string[2] ) { - break; - } - string += 3; - } -} - - - -static void EmitCommand(ELastCommand command) -{ - switch(command) - { - case LAST_COMMAND_MOV_EDI_EAX: - EmitString( "89 07" ); // mov dword ptr [edi], eax - break; - - case LAST_COMMAND_SUB_DI_4: - EmitString( "83 EF 04" ); // sub edi, 4 - break; - - case LAST_COMMAND_SUB_DI_8: - EmitString( "83 EF 08" ); // sub edi, 8 - break; - default: - break; - } - LastCommand = command; -} - -static void EmitAddEDI4(vm_t *vm) { - if (LastCommand == LAST_COMMAND_SUB_DI_4 && jused[instruction-1] == 0) - { // sub di,4 - compiledOfs -= 3; - vm->instructionPointers[ instruction-1 ] = compiledOfs; - return; - } - if (LastCommand == LAST_COMMAND_SUB_DI_8 && jused[instruction-1] == 0) - { // sub di,8 - compiledOfs -= 3; - vm->instructionPointers[ instruction-1 ] = compiledOfs; - EmitString( "83 EF 04" ); // sub edi,4 - return; - } - EmitString( "83 C7 04" ); // add edi,4 -} - -static void EmitMovEAXEDI(vm_t *vm) { - if (LastCommand == LAST_COMMAND_MOV_EDI_EAX) - { // mov [edi], eax - compiledOfs -= 2; - vm->instructionPointers[ instruction-1 ] = compiledOfs; - return; - } - if (pop1 == OP_DIVI || pop1 == OP_DIVU || pop1 == OP_MULI || pop1 == OP_MULU || - pop1 == OP_STORE4 || pop1 == OP_STORE2 || pop1 == OP_STORE1 ) - { - return; - } - if (pop1 == OP_CONST && buf[compiledOfs-6] == 0xC7 && buf[compiledOfs-5] == 0x07 ) - { // mov edi, 0x123456 - compiledOfs -= 6; - vm->instructionPointers[ instruction-1 ] = compiledOfs; - EmitString( "B8" ); // mov eax, 0x12345678 - Emit4( lastConst ); - return; - } - EmitString( "8B 07" ); // mov eax, dword ptr [edi] -} - -qboolean EmitMovEBXEDI(vm_t *vm, int andit) { - if (LastCommand == LAST_COMMAND_MOV_EDI_EAX) - { // mov [edi], eax - compiledOfs -= 2; - vm->instructionPointers[ instruction-1 ] = compiledOfs; - EmitString( "8B D8"); // mov bx, eax - return qfalse; - } - if (pop1 == OP_DIVI || pop1 == OP_DIVU || pop1 == OP_MULI || pop1 == OP_MULU || - pop1 == OP_STORE4 || pop1 == OP_STORE2 || pop1 == OP_STORE1 ) - { - EmitString( "8B D8"); // mov bx, eax - return qfalse; - } - if (pop1 == OP_CONST && buf[compiledOfs-6] == 0xC7 && buf[compiledOfs-5] == 0x07 ) - { // mov edi, 0x123456 - compiledOfs -= 6; - vm->instructionPointers[ instruction-1 ] = compiledOfs; - EmitString( "BB" ); // mov ebx, 0x12345678 - if (andit) { - Emit4( lastConst & andit ); - } else { - Emit4( lastConst ); - } - return qtrue; - } - - EmitString( "8B 1F" ); // mov ebx, dword ptr [edi] - return qfalse; -} - -/* -================= -VM_Compile -================= -*/ -void VM_Compile( vm_t *vm, vmHeader_t *header ) { - int op; - int maxLength; - int v; - int i; - qboolean opt; - - // allocate a very large temp buffer, we will shrink it later - maxLength = header->codeLength * 8; - buf = Z_Malloc( maxLength ); - jused = Z_Malloc(header->instructionCount + 2 ); - - Com_Memset(jused, 0, header->instructionCount+2); - - // ensure that the optimisation pass knows about all the jump - // table targets - for( i = 0; i < vm->numJumpTableTargets; i++ ) { - jused[ *(int *)(vm->jumpTableTargets + ( i * sizeof( int ) ) ) ] = 1; - } - - for(pass=0;pass<2;pass++) { - oc0 = -23423; - oc1 = -234354; - pop0 = -43435; - pop1 = -545455; - - // translate all instructions - pc = 0; - instruction = 0; - code = (byte *)header + header->codeOffset; - compiledOfs = 0; - - LastCommand = LAST_COMMAND_NONE; - - while ( instruction < header->instructionCount ) { - if ( compiledOfs > maxLength - 16 ) { - Com_Error( ERR_FATAL, "VM_CompileX86: maxLength exceeded" ); - } - - vm->instructionPointers[ instruction ] = compiledOfs; - instruction++; - - if ( pc > header->codeLength ) { - Com_Error( ERR_FATAL, "VM_CompileX86: pc > header->codeLength" ); - } - - op = code[ pc ]; - pc++; - switch ( op ) { - case 0: - break; - case OP_BREAK: - EmitString( "CC" ); // int 3 - break; - case OP_ENTER: - EmitString( "81 EE" ); // sub esi, 0x12345678 - Emit4( Constant4() ); - break; - case OP_CONST: - if (code[pc+4] == OP_LOAD4) { - EmitAddEDI4(vm); - EmitString( "BB" ); // mov ebx, 0x12345678 - Emit4( (Constant4()&vm->dataMask) + (int)vm->dataBase); - EmitString( "8B 03" ); // mov eax, dword ptr [ebx] - EmitCommand(LAST_COMMAND_MOV_EDI_EAX); // mov dword ptr [edi], eax - pc++; // OP_LOAD4 - instruction += 1; - break; - } - if (code[pc+4] == OP_LOAD2) { - EmitAddEDI4(vm); - EmitString( "BB" ); // mov ebx, 0x12345678 - Emit4( (Constant4()&vm->dataMask) + (int)vm->dataBase); - EmitString( "0F B7 03" ); // movzx eax, word ptr [ebx] - EmitCommand(LAST_COMMAND_MOV_EDI_EAX); // mov dword ptr [edi], eax - pc++; // OP_LOAD4 - instruction += 1; - break; - } - if (code[pc+4] == OP_LOAD1) { - EmitAddEDI4(vm); - EmitString( "BB" ); // mov ebx, 0x12345678 - Emit4( (Constant4()&vm->dataMask) + (int)vm->dataBase); - EmitString( "0F B6 03" ); // movzx eax, byte ptr [ebx] - EmitCommand(LAST_COMMAND_MOV_EDI_EAX); // mov dword ptr [edi], eax - pc++; // OP_LOAD4 - instruction += 1; - break; - } - if (code[pc+4] == OP_STORE4) { - opt = EmitMovEBXEDI(vm, (vm->dataMask & ~3)); - EmitString( "B8" ); // mov eax, 0x12345678 - Emit4( Constant4() ); -// if (!opt) { -// EmitString( "81 E3" ); // and ebx, 0x12345678 -// Emit4( vm->dataMask & ~3 ); -// } - EmitString( "89 83" ); // mov dword ptr [ebx+0x12345678], eax - Emit4( (int)vm->dataBase ); - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - pc++; // OP_STORE4 - instruction += 1; - break; - } - if (code[pc+4] == OP_STORE2) { - opt = EmitMovEBXEDI(vm, (vm->dataMask & ~1)); - EmitString( "B8" ); // mov eax, 0x12345678 - Emit4( Constant4() ); -// if (!opt) { -// EmitString( "81 E3" ); // and ebx, 0x12345678 -// Emit4( vm->dataMask & ~1 ); -// } - EmitString( "66 89 83" ); // mov word ptr [ebx+0x12345678], eax - Emit4( (int)vm->dataBase ); - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - pc++; // OP_STORE4 - instruction += 1; - break; - } - if (code[pc+4] == OP_STORE1) { - opt = EmitMovEBXEDI(vm, vm->dataMask); - EmitString( "B8" ); // mov eax, 0x12345678 - Emit4( Constant4() ); -// if (!opt) { -// EmitString( "81 E3" ); // and ebx, 0x12345678 -// Emit4( vm->dataMask ); -// } - EmitString( "88 83" ); // mov byte ptr [ebx+0x12345678], eax - Emit4( (int)vm->dataBase ); - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - pc++; // OP_STORE4 - instruction += 1; - break; - } - if (code[pc+4] == OP_ADD) { - EmitString( "81 07" ); // add dword ptr [edi], 0x1234567 - Emit4( Constant4() ); - pc++; // OP_ADD - instruction += 1; - break; - } - if (code[pc+4] == OP_SUB) { - EmitString( "81 2F" ); // sub dword ptr [edi], 0x1234567 - Emit4( Constant4() ); - pc++; // OP_ADD - instruction += 1; - break; - } - EmitAddEDI4(vm); - EmitString( "C7 07" ); // mov dword ptr [edi], 0x12345678 - lastConst = Constant4(); - Emit4( lastConst ); - if (code[pc] == OP_JUMP) { - jused[lastConst] = 1; - } - break; - case OP_LOCAL: - EmitAddEDI4(vm); - EmitString( "8D 86" ); // lea eax, [0x12345678 + esi] - oc0 = oc1; - oc1 = Constant4(); - Emit4( oc1 ); - EmitCommand(LAST_COMMAND_MOV_EDI_EAX); // mov dword ptr [edi], eax - break; - case OP_ARG: - EmitMovEAXEDI(vm); // mov eax,dword ptr [edi] - EmitString( "89 86" ); // mov dword ptr [esi+database],eax - // FIXME: range check - Emit4( Constant1() + (int)vm->dataBase ); - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - break; - case OP_CALL: - EmitString( "C7 86" ); // mov dword ptr [esi+database],0x12345678 - Emit4( (int)vm->dataBase ); - Emit4( pc ); - EmitString( "FF 15" ); // call asmCallPtr - Emit4( (int)&asmCallPtr ); - break; - case OP_PUSH: - EmitAddEDI4(vm); - break; - case OP_POP: - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - break; - case OP_LEAVE: - v = Constant4(); - EmitString( "81 C6" ); // add esi, 0x12345678 - Emit4( v ); - EmitString( "C3" ); // ret - break; - case OP_LOAD4: - if (code[pc] == OP_CONST && code[pc+5] == OP_ADD && code[pc+6] == OP_STORE4) { - if (oc0 == oc1 && pop0 == OP_LOCAL && pop1 == OP_LOCAL) { - compiledOfs -= 11; - vm->instructionPointers[ instruction-1 ] = compiledOfs; - } - pc++; // OP_CONST - v = Constant4(); - EmitMovEBXEDI(vm, vm->dataMask); - if (v == 1 && oc0 == oc1 && pop0 == OP_LOCAL && pop1 == OP_LOCAL) { - EmitString( "FF 83"); // inc dword ptr [ebx + 0x12345678] - Emit4( (int)vm->dataBase ); - } else { - EmitString( "8B 83" ); // mov eax, dword ptr [ebx + 0x12345678] - Emit4( (int)vm->dataBase ); - EmitString( "05" ); // add eax, const - Emit4( v ); - if (oc0 == oc1 && pop0 == OP_LOCAL && pop1 == OP_LOCAL) { - EmitString( "89 83" ); // mov dword ptr [ebx+0x12345678], eax - Emit4( (int)vm->dataBase ); - } else { - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - EmitString( "8B 1F" ); // mov ebx, dword ptr [edi] - EmitString( "89 83" ); // mov dword ptr [ebx+0x12345678], eax - Emit4( (int)vm->dataBase ); - } - } - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - pc++; // OP_ADD - pc++; // OP_STORE - instruction += 3; - break; - } - - if (code[pc] == OP_CONST && code[pc+5] == OP_SUB && code[pc+6] == OP_STORE4) { - if (oc0 == oc1 && pop0 == OP_LOCAL && pop1 == OP_LOCAL) { - compiledOfs -= 11; - vm->instructionPointers[ instruction-1 ] = compiledOfs; - } - EmitMovEBXEDI(vm, vm->dataMask); - EmitString( "8B 83" ); // mov eax, dword ptr [ebx + 0x12345678] - Emit4( (int)vm->dataBase ); - pc++; // OP_CONST - v = Constant4(); - if (v == 1 && oc0 == oc1 && pop0 == OP_LOCAL && pop1 == OP_LOCAL) { - EmitString( "FF 8B"); // dec dword ptr [ebx + 0x12345678] - Emit4( (int)vm->dataBase ); - } else { - EmitString( "2D" ); // sub eax, const - Emit4( v ); - if (oc0 == oc1 && pop0 == OP_LOCAL && pop1 == OP_LOCAL) { - EmitString( "89 83" ); // mov dword ptr [ebx+0x12345678], eax - Emit4( (int)vm->dataBase ); - } else { - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - EmitString( "8B 1F" ); // mov ebx, dword ptr [edi] - EmitString( "89 83" ); // mov dword ptr [ebx+0x12345678], eax - Emit4( (int)vm->dataBase ); - } - } - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - pc++; // OP_SUB - pc++; // OP_STORE - instruction += 3; - break; - } - - if (buf[compiledOfs-2] == 0x89 && buf[compiledOfs-1] == 0x07) { - compiledOfs -= 2; - vm->instructionPointers[ instruction-1 ] = compiledOfs; - EmitString( "8B 80"); // mov eax, dword ptr [eax + 0x1234567] - Emit4( (int)vm->dataBase ); - EmitCommand(LAST_COMMAND_MOV_EDI_EAX); // mov dword ptr [edi], eax - break; - } - EmitMovEBXEDI(vm, vm->dataMask); - EmitString( "8B 83" ); // mov eax, dword ptr [ebx + 0x12345678] - Emit4( (int)vm->dataBase ); - EmitCommand(LAST_COMMAND_MOV_EDI_EAX); // mov dword ptr [edi], eax - break; - case OP_LOAD2: - EmitMovEBXEDI(vm, vm->dataMask); - EmitString( "0F B7 83" ); // movzx eax, word ptr [ebx + 0x12345678] - Emit4( (int)vm->dataBase ); - EmitCommand(LAST_COMMAND_MOV_EDI_EAX); // mov dword ptr [edi], eax - break; - case OP_LOAD1: - EmitMovEBXEDI(vm, vm->dataMask); - EmitString( "0F B6 83" ); // movzx eax, byte ptr [ebx + 0x12345678] - Emit4( (int)vm->dataBase ); - EmitCommand(LAST_COMMAND_MOV_EDI_EAX); // mov dword ptr [edi], eax - break; - case OP_STORE4: - EmitMovEAXEDI(vm); - EmitString( "8B 5F FC" ); // mov ebx, dword ptr [edi-4] -// if (pop1 != OP_CALL) { -// EmitString( "81 E3" ); // and ebx, 0x12345678 -// Emit4( vm->dataMask & ~3 ); -// } - EmitString( "89 83" ); // mov dword ptr [ebx+0x12345678], eax - Emit4( (int)vm->dataBase ); - EmitCommand(LAST_COMMAND_SUB_DI_8); // sub edi, 8 - break; - case OP_STORE2: - EmitMovEAXEDI(vm); - EmitString( "8B 5F FC" ); // mov ebx, dword ptr [edi-4] -// EmitString( "81 E3" ); // and ebx, 0x12345678 -// Emit4( vm->dataMask & ~1 ); - EmitString( "66 89 83" ); // mov word ptr [ebx+0x12345678], eax - Emit4( (int)vm->dataBase ); - EmitCommand(LAST_COMMAND_SUB_DI_8); // sub edi, 8 - break; - case OP_STORE1: - EmitMovEAXEDI(vm); - EmitString( "8B 5F FC" ); // mov ebx, dword ptr [edi-4] -// EmitString( "81 E3" ); // and ebx, 0x12345678 -// Emit4( vm->dataMask ); - EmitString( "88 83" ); // mov byte ptr [ebx+0x12345678], eax - Emit4( (int)vm->dataBase ); - EmitCommand(LAST_COMMAND_SUB_DI_8); // sub edi, 8 - break; - - case OP_EQ: - EmitCommand(LAST_COMMAND_SUB_DI_8); // sub edi, 8 - EmitString( "8B 47 04" ); // mov eax, dword ptr [edi+4] - EmitString( "3B 47 08" ); // cmp eax, dword ptr [edi+8] - EmitString( "75 06" ); // jne +6 - EmitString( "FF 25" ); // jmp [0x12345678] - v = Constant4(); - jused[v] = 1; - Emit4( (int)vm->instructionPointers + v*4 ); - break; - case OP_NE: - EmitCommand(LAST_COMMAND_SUB_DI_8); // sub edi, 8 - EmitString( "8B 47 04" ); // mov eax, dword ptr [edi+4] - EmitString( "3B 47 08" ); // cmp eax, dword ptr [edi+8] - EmitString( "74 06" ); // je +6 - EmitString( "FF 25" ); // jmp [0x12345678] - v = Constant4(); - jused[v] = 1; - Emit4( (int)vm->instructionPointers + v*4 ); - break; - case OP_LTI: - EmitCommand(LAST_COMMAND_SUB_DI_8); // sub edi, 8 - EmitString( "8B 47 04" ); // mov eax, dword ptr [edi+4] - EmitString( "3B 47 08" ); // cmp eax, dword ptr [edi+8] - EmitString( "7D 06" ); // jnl +6 - EmitString( "FF 25" ); // jmp [0x12345678] - v = Constant4(); - jused[v] = 1; - Emit4( (int)vm->instructionPointers + v*4 ); - break; - case OP_LEI: - EmitCommand(LAST_COMMAND_SUB_DI_8); // sub edi, 8 - EmitString( "8B 47 04" ); // mov eax, dword ptr [edi+4] - EmitString( "3B 47 08" ); // cmp eax, dword ptr [edi+8] - EmitString( "7F 06" ); // jnle +6 - EmitString( "FF 25" ); // jmp [0x12345678] - v = Constant4(); - jused[v] = 1; - Emit4( (int)vm->instructionPointers + v*4 ); - break; - case OP_GTI: - EmitCommand(LAST_COMMAND_SUB_DI_8); // sub edi, 8 - EmitString( "8B 47 04" ); // mov eax, dword ptr [edi+4] - EmitString( "3B 47 08" ); // cmp eax, dword ptr [edi+8] - EmitString( "7E 06" ); // jng +6 - EmitString( "FF 25" ); // jmp [0x12345678] - v = Constant4(); - jused[v] = 1; - Emit4( (int)vm->instructionPointers + v*4 ); - break; - case OP_GEI: - EmitCommand(LAST_COMMAND_SUB_DI_8); // sub edi, 8 - EmitString( "8B 47 04" ); // mov eax, dword ptr [edi+4] - EmitString( "3B 47 08" ); // cmp eax, dword ptr [edi+8] - EmitString( "7C 06" ); // jnge +6 - EmitString( "FF 25" ); // jmp [0x12345678] - v = Constant4(); - jused[v] = 1; - Emit4( (int)vm->instructionPointers + v*4 ); - break; - case OP_LTU: - EmitCommand(LAST_COMMAND_SUB_DI_8); // sub edi, 8 - EmitString( "8B 47 04" ); // mov eax, dword ptr [edi+4] - EmitString( "3B 47 08" ); // cmp eax, dword ptr [edi+8] - EmitString( "73 06" ); // jnb +6 - EmitString( "FF 25" ); // jmp [0x12345678] - v = Constant4(); - jused[v] = 1; - Emit4( (int)vm->instructionPointers + v*4 ); - break; - case OP_LEU: - EmitCommand(LAST_COMMAND_SUB_DI_8); // sub edi, 8 - EmitString( "8B 47 04" ); // mov eax, dword ptr [edi+4] - EmitString( "3B 47 08" ); // cmp eax, dword ptr [edi+8] - EmitString( "77 06" ); // jnbe +6 - EmitString( "FF 25" ); // jmp [0x12345678] - v = Constant4(); - jused[v] = 1; - Emit4( (int)vm->instructionPointers + v*4 ); - break; - case OP_GTU: - EmitCommand(LAST_COMMAND_SUB_DI_8); // sub edi, 8 - EmitString( "8B 47 04" ); // mov eax, dword ptr [edi+4] - EmitString( "3B 47 08" ); // cmp eax, dword ptr [edi+8] - EmitString( "76 06" ); // jna +6 - EmitString( "FF 25" ); // jmp [0x12345678] - v = Constant4(); - jused[v] = 1; - Emit4( (int)vm->instructionPointers + v*4 ); - break; - case OP_GEU: - EmitCommand(LAST_COMMAND_SUB_DI_8); // sub edi, 8 - EmitString( "8B 47 04" ); // mov eax, dword ptr [edi+4] - EmitString( "3B 47 08" ); // cmp eax, dword ptr [edi+8] - EmitString( "72 06" ); // jnae +6 - EmitString( "FF 25" ); // jmp [0x12345678] - v = Constant4(); - jused[v] = 1; - Emit4( (int)vm->instructionPointers + v*4 ); - break; - case OP_EQF: - EmitCommand(LAST_COMMAND_SUB_DI_8); // sub edi, 8 - EmitString( "D9 47 04" ); // fld dword ptr [edi+4] - EmitString( "D8 5F 08" ); // fcomp dword ptr [edi+8] - EmitString( "DF E0" ); // fnstsw ax - EmitString( "F6 C4 40" ); // test ah,0x40 - EmitString( "74 06" ); // je +6 - EmitString( "FF 25" ); // jmp [0x12345678] - v = Constant4(); - jused[v] = 1; - Emit4( (int)vm->instructionPointers + v*4 ); - break; - case OP_NEF: - EmitCommand(LAST_COMMAND_SUB_DI_8); // sub edi, 8 - EmitString( "D9 47 04" ); // fld dword ptr [edi+4] - EmitString( "D8 5F 08" ); // fcomp dword ptr [edi+8] - EmitString( "DF E0" ); // fnstsw ax - EmitString( "F6 C4 40" ); // test ah,0x40 - EmitString( "75 06" ); // jne +6 - EmitString( "FF 25" ); // jmp [0x12345678] - v = Constant4(); - jused[v] = 1; - Emit4( (int)vm->instructionPointers + v*4 ); - break; - case OP_LTF: - EmitCommand(LAST_COMMAND_SUB_DI_8); // sub edi, 8 - EmitString( "D9 47 04" ); // fld dword ptr [edi+4] - EmitString( "D8 5F 08" ); // fcomp dword ptr [edi+8] - EmitString( "DF E0" ); // fnstsw ax - EmitString( "F6 C4 01" ); // test ah,0x01 - EmitString( "74 06" ); // je +6 - EmitString( "FF 25" ); // jmp [0x12345678] - v = Constant4(); - jused[v] = 1; - Emit4( (int)vm->instructionPointers + v*4 ); - break; - case OP_LEF: - EmitCommand(LAST_COMMAND_SUB_DI_8); // sub edi, 8 - EmitString( "D9 47 04" ); // fld dword ptr [edi+4] - EmitString( "D8 5F 08" ); // fcomp dword ptr [edi+8] - EmitString( "DF E0" ); // fnstsw ax - EmitString( "F6 C4 41" ); // test ah,0x41 - EmitString( "74 06" ); // je +6 - EmitString( "FF 25" ); // jmp [0x12345678] - v = Constant4(); - jused[v] = 1; - Emit4( (int)vm->instructionPointers + v*4 ); - break; - case OP_GTF: - EmitCommand(LAST_COMMAND_SUB_DI_8); // sub edi, 8 - EmitString( "D9 47 04" ); // fld dword ptr [edi+4] - EmitString( "D8 5F 08" ); // fcomp dword ptr [edi+8] - EmitString( "DF E0" ); // fnstsw ax - EmitString( "F6 C4 41" ); // test ah,0x41 - EmitString( "75 06" ); // jne +6 - EmitString( "FF 25" ); // jmp [0x12345678] - v = Constant4(); - jused[v] = 1; - Emit4( (int)vm->instructionPointers + v*4 ); - break; - case OP_GEF: - EmitCommand(LAST_COMMAND_SUB_DI_8); // sub edi, 8 - EmitString( "D9 47 04" ); // fld dword ptr [edi+4] - EmitString( "D8 5F 08" ); // fcomp dword ptr [edi+8] - EmitString( "DF E0" ); // fnstsw ax - EmitString( "F6 C4 01" ); // test ah,0x01 - EmitString( "75 06" ); // jne +6 - EmitString( "FF 25" ); // jmp [0x12345678] - v = Constant4(); - jused[v] = 1; - Emit4( (int)vm->instructionPointers + v*4 ); - break; - case OP_NEGI: - EmitString( "F7 1F" ); // neg dword ptr [edi] - break; - case OP_ADD: - EmitMovEAXEDI(vm); // mov eax, dword ptr [edi] - EmitString( "01 47 FC" ); // add dword ptr [edi-4],eax - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - break; - case OP_SUB: - EmitMovEAXEDI(vm); // mov eax, dword ptr [edi] - EmitString( "29 47 FC" ); // sub dword ptr [edi-4],eax - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - break; - case OP_DIVI: - EmitString( "8B 47 FC" ); // mov eax,dword ptr [edi-4] - EmitString( "99" ); // cdq - EmitString( "F7 3F" ); // idiv dword ptr [edi] - EmitString( "89 47 FC" ); // mov dword ptr [edi-4],eax - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - break; - case OP_DIVU: - EmitString( "8B 47 FC" ); // mov eax,dword ptr [edi-4] - EmitString( "33 D2" ); // xor edx, edx - EmitString( "F7 37" ); // div dword ptr [edi] - EmitString( "89 47 FC" ); // mov dword ptr [edi-4],eax - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - break; - case OP_MODI: - EmitString( "8B 47 FC" ); // mov eax,dword ptr [edi-4] - EmitString( "99" ); // cdq - EmitString( "F7 3F" ); // idiv dword ptr [edi] - EmitString( "89 57 FC" ); // mov dword ptr [edi-4],edx - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - break; - case OP_MODU: - EmitString( "8B 47 FC" ); // mov eax,dword ptr [edi-4] - EmitString( "33 D2" ); // xor edx, edx - EmitString( "F7 37" ); // div dword ptr [edi] - EmitString( "89 57 FC" ); // mov dword ptr [edi-4],edx - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - break; - case OP_MULI: - EmitString( "8B 47 FC" ); // mov eax,dword ptr [edi-4] - EmitString( "F7 2F" ); // imul dword ptr [edi] - EmitString( "89 47 FC" ); // mov dword ptr [edi-4],eax - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - break; - case OP_MULU: - EmitString( "8B 47 FC" ); // mov eax,dword ptr [edi-4] - EmitString( "F7 27" ); // mul dword ptr [edi] - EmitString( "89 47 FC" ); // mov dword ptr [edi-4],eax - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - break; - case OP_BAND: - EmitMovEAXEDI(vm); // mov eax, dword ptr [edi] - EmitString( "21 47 FC" ); // and dword ptr [edi-4],eax - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - break; - case OP_BOR: - EmitMovEAXEDI(vm); // mov eax, dword ptr [edi] - EmitString( "09 47 FC" ); // or dword ptr [edi-4],eax - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - break; - case OP_BXOR: - EmitMovEAXEDI(vm); // mov eax, dword ptr [edi] - EmitString( "31 47 FC" ); // xor dword ptr [edi-4],eax - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - break; - case OP_BCOM: - EmitString( "F7 17" ); // not dword ptr [edi] - break; - case OP_LSH: - EmitString( "8B 0F" ); // mov ecx, dword ptr [edi] - EmitString( "D3 67 FC" ); // shl dword ptr [edi-4], cl - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - break; - case OP_RSHI: - EmitString( "8B 0F" ); // mov ecx, dword ptr [edi] - EmitString( "D3 7F FC" ); // sar dword ptr [edi-4], cl - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - break; - case OP_RSHU: - EmitString( "8B 0F" ); // mov ecx, dword ptr [edi] - EmitString( "D3 6F FC" ); // shr dword ptr [edi-4], cl - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - break; - case OP_NEGF: - EmitString( "D9 07" ); // fld dword ptr [edi] - EmitString( "D9 E0" ); // fchs - EmitString( "D9 1F" ); // fstp dword ptr [edi] - break; - case OP_ADDF: - EmitString( "D9 47 FC" ); // fld dword ptr [edi-4] - EmitString( "D8 07" ); // fadd dword ptr [edi] - EmitString( "D9 5F FC" ); // fstp dword ptr [edi-4] - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - break; - case OP_SUBF: - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - EmitString( "D9 07" ); // fld dword ptr [edi] - EmitString( "D8 67 04" ); // fsub dword ptr [edi+4] - EmitString( "D9 1F" ); // fstp dword ptr [edi] - break; - case OP_DIVF: - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - EmitString( "D9 07" ); // fld dword ptr [edi] - EmitString( "D8 77 04" ); // fdiv dword ptr [edi+4] - EmitString( "D9 1F" ); // fstp dword ptr [edi] - break; - case OP_MULF: - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - EmitString( "D9 07" ); // fld dword ptr [edi] - EmitString( "D8 4f 04" ); // fmul dword ptr [edi+4] - EmitString( "D9 1F" ); // fstp dword ptr [edi] - break; - case OP_CVIF: - EmitString( "DB 07" ); // fild dword ptr [edi] - EmitString( "D9 1F" ); // fstp dword ptr [edi] - break; - case OP_CVFI: -#ifndef FTOL_PTR // WHENHELLISFROZENOVER // bk001213 - was used in 1.17 - // not IEEE complient, but simple and fast - EmitString( "D9 07" ); // fld dword ptr [edi] - EmitString( "DB 1F" ); // fistp dword ptr [edi] -#else // FTOL_PTR - // call the library conversion function - EmitString( "D9 07" ); // fld dword ptr [edi] - EmitString( "FF 15" ); // call ftolPtr - Emit4( (int)&ftolPtr ); - EmitCommand(LAST_COMMAND_MOV_EDI_EAX); // mov dword ptr [edi], eax -#endif - break; - case OP_SEX8: - EmitString( "0F BE 07" ); // movsx eax, byte ptr [edi] - EmitCommand(LAST_COMMAND_MOV_EDI_EAX); // mov dword ptr [edi], eax - break; - case OP_SEX16: - EmitString( "0F BF 07" ); // movsx eax, word ptr [edi] - EmitCommand(LAST_COMMAND_MOV_EDI_EAX); // mov dword ptr [edi], eax - break; - - case OP_BLOCK_COPY: - // FIXME: range check - EmitString( "56" ); // push esi - EmitString( "57" ); // push edi - EmitString( "8B 37" ); // mov esi,[edi] - EmitString( "8B 7F FC" ); // mov edi,[edi-4] - EmitString( "B9" ); // mov ecx,0x12345678 - Emit4( Constant4() >> 2 ); - EmitString( "B8" ); // mov eax, datamask - Emit4( vm->dataMask ); - EmitString( "BB" ); // mov ebx, database - Emit4( (int)vm->dataBase ); - EmitString( "23 F0" ); // and esi, eax - EmitString( "03 F3" ); // add esi, ebx - EmitString( "23 F8" ); // and edi, eax - EmitString( "03 FB" ); // add edi, ebx - EmitString( "F3 A5" ); // rep movsd - EmitString( "5F" ); // pop edi - EmitString( "5E" ); // pop esi - EmitCommand(LAST_COMMAND_SUB_DI_8); // sub edi, 8 - break; - - case OP_JUMP: - EmitCommand(LAST_COMMAND_SUB_DI_4); // sub edi, 4 - EmitString( "8B 47 04" ); // mov eax,dword ptr [edi+4] - // FIXME: range check - EmitString( "FF 24 85" ); // jmp dword ptr [instructionPointers + eax * 4] - Emit4( (int)vm->instructionPointers ); - break; - default: - Com_Error( ERR_DROP, "VM_CompileX86: bad opcode %i at offset %i", op, pc ); - } - pop0 = pop1; - pop1 = op; - } - } - - // copy to an exact size buffer on the hunk - vm->codeLength = compiledOfs; - vm->codeBase = Hunk_Alloc( compiledOfs, h_low ); - Com_Memcpy( vm->codeBase, buf, compiledOfs ); - Z_Free( buf ); - Z_Free( jused ); - Com_Printf( "VM file %s compiled to %i bytes of code\n", vm->name, compiledOfs ); - - // offset all the instruction pointers for the new location - for ( i = 0 ; i < header->instructionCount ; i++ ) { - vm->instructionPointers[i] += (int)vm->codeBase; - } - -#if 0 // ndef _WIN32 - // Must make the newly generated code executable - { - int r; - unsigned long addr; - int psize = getpagesize(); - - addr = ((int)vm->codeBase & ~(psize-1)) - psize; - - r = mprotect((char*)addr, vm->codeLength + (int)vm->codeBase - addr + psize, - PROT_READ | PROT_WRITE | PROT_EXEC ); - - if (r < 0) - Com_Error( ERR_FATAL, "mprotect failed to change PROT_EXEC" ); - } -#endif - -} - -/* -============== -VM_CallCompiled - -This function is called directly by the generated code -============== -*/ -int VM_CallCompiled( vm_t *vm, int *args ) { - int stack[1024]; - int programCounter; - int programStack; - int stackOnEntry; - byte *image; - void *entryPoint; - void *opStack; - int *oldInstructionPointers; - - oldInstructionPointers = instructionPointers; - - currentVM = vm; - instructionPointers = vm->instructionPointers; - - // interpret the code - vm->currentlyInterpreting = qtrue; - - callMask = vm->dataMask; - - // we might be called recursively, so this might not be the very top - programStack = vm->programStack; - stackOnEntry = programStack; - - // set up the stack frame - image = vm->dataBase; - - programCounter = 0; - - programStack -= 48; - - *(int *)&image[ programStack + 44] = args[9]; - *(int *)&image[ programStack + 40] = args[8]; - *(int *)&image[ programStack + 36] = args[7]; - *(int *)&image[ programStack + 32] = args[6]; - *(int *)&image[ programStack + 28] = args[5]; - *(int *)&image[ programStack + 24] = args[4]; - *(int *)&image[ programStack + 20] = args[3]; - *(int *)&image[ programStack + 16] = args[2]; - *(int *)&image[ programStack + 12] = args[1]; - *(int *)&image[ programStack + 8 ] = args[0]; - *(int *)&image[ programStack + 4 ] = 0; // return stack - *(int *)&image[ programStack ] = -1; // will terminate the loop on return - - // off we go into generated code... - entryPoint = vm->codeBase; - opStack = &stack; - -#ifdef _MSC_VER - __asm { - pushad - mov esi, programStack; - mov edi, opStack - call entryPoint - mov programStack, esi - mov opStack, edi - popad - } -#else - { - static int memProgramStack; - static void *memOpStack; - static void *memEntryPoint; - - memProgramStack = programStack; - memOpStack = opStack; - memEntryPoint = entryPoint; - - __asm__(" pushal \r\n" \ - " movl %0,%%esi \r\n" \ - " movl %1,%%edi \r\n" \ - " call *%2 \r\n" \ - " movl %%esi,%0 \r\n" \ - " movl %%edi,%1 \r\n" \ - " popal \r\n" \ - : "=m" (memProgramStack), "=m" (memOpStack) \ - : "m" (memEntryPoint), "m" (memProgramStack), "m" (memOpStack) \ - : "si", "di" \ - ); - - programStack = memProgramStack; - opStack = memOpStack; - } -#endif - - if ( opStack != &stack[1] ) { - Com_Error( ERR_DROP, "opStack corrupted in compiled code" ); - } - if ( programStack != stackOnEntry - 48 ) { - Com_Error( ERR_DROP, "programStack corrupted in compiled code" ); - } - - vm->programStack = stackOnEntry; - - // in case we were recursively called by another vm - instructionPointers = oldInstructionPointers; - - return *(int *)opStack; -} |