/* * DOS interrupt 34->3e handlers. All FPU interrupt code should be * moved into this file. * * Copyright 2002 Robert 'Admiral' Coeyman * * 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 2.1 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA */ #include <stdlib.h> #include "dosexe.h" #include "wine/debug.h" WINE_DEFAULT_DEBUG_CHANNEL(int); /* * The actual work is done by a single routine. */ static void FPU_ModifyCode(CONTEXT *context, BYTE Opcode); /********************************************************************** * DOSVM_Int34Handler * * Handler for int 34 (FLOATING POINT EMULATION - Opcode 0xd8). * * The interrupt list isn't specific about what this interrupt * actually does. [ interrup.m ] */ void WINAPI DOSVM_Int34Handler(CONTEXT *context) { TRACE("Int 0x34 called-- FP opcode 0xd8\n"); FPU_ModifyCode(context, 0xd8); } /********************************************************************** * DOSVM_Int35Handler * * Handler for int 35 (FLOATING POINT EMULATION - Opcode 0xd9). * * The interrupt list isn't specific about what this interrupt * actually does. [ interrup.m ] */ void WINAPI DOSVM_Int35Handler(CONTEXT *context) { TRACE("Int 0x35 called-- FP opcode 0xd9\n"); FPU_ModifyCode(context, 0xd9); } /********************************************************************** * DOSVM_Int36Handler * * Handler for int 36 (FLOATING POINT EMULATION - Opcode 0xda). * * The interrupt list isn't specific about what this interrupt * actually does. [ interrup.m ] */ void WINAPI DOSVM_Int36Handler(CONTEXT *context) { TRACE("Int 0x36 called-- FP opcode 0xda\n"); FPU_ModifyCode(context, 0xda); } /********************************************************************** * DOSVM_Int37Handler * * Handler for int 37 (FLOATING POINT EMULATION - Opcode 0xdb). * * The interrupt list isn't specific about what this interrupt * actually does. [ interrup.m ] */ void WINAPI DOSVM_Int37Handler(CONTEXT *context) { TRACE("Int 0x37 called-- FP opcode 0xdb\n"); FPU_ModifyCode(context, 0xdb); } /********************************************************************** * DOSVM_Int38Handler * * Handler for int 38 (FLOATING POINT EMULATION - Opcode 0xdc). * * Between versions 3.0 and 5.01, the original PC-MOS API call that * was here was moved to int 0xd4. * * The interrupt list isn't specific about what this interrupt * actually does. [ interrup.m ] */ void WINAPI DOSVM_Int38Handler(CONTEXT *context) { TRACE("Int 0x38 called-- FP opcode 0xdc\n"); FPU_ModifyCode(context, 0xdc); } /********************************************************************** * DOSVM_Int39Handler * * Handler for int 39 (FLOATING POINT EMULATION - Opcode 0xdd). * * The interrupt list isn't specific about what this interrupt * actually does. [ interrup.m ] */ void WINAPI DOSVM_Int39Handler(CONTEXT *context) { TRACE("Int 0x39 called-- FP opcode 0xdd\n"); FPU_ModifyCode(context, 0xdd); } /********************************************************************** * DOSVM_Int3aHandler * * Handler for int 3a (FLOATING POINT EMULATION - Opcode 0xde). * * The interrupt list isn't specific about what this interrupt * actually does. [ interrup.m ] */ void WINAPI DOSVM_Int3aHandler(CONTEXT *context) { TRACE("Int 0x3a called-- FP opcode 0xde\n"); FPU_ModifyCode(context, 0xde); } /********************************************************************** * DOSVM_Int3bHandler * * Handler for int 3B (FLOATING POINT EMULATION - Opcode 0xdf). * * The interrupt list isn't specific about what this interrupt * actually does. [ interrup.m ] */ void WINAPI DOSVM_Int3bHandler(CONTEXT *context) { TRACE("Int 0x3b called-- FP opcode 0xdf\n"); FPU_ModifyCode(context, 0xdf); } /********************************************************************** * DOSVM_Int3cHandler * * Handler for int 3C (FLOATING POINT EMULATION - INSTRUCTIONS WITH SEGMENT OVERRIDE). * * Generated code is CD 3C xy mm ... (CD = int | 3C = this interrupt) * xy is a modified ESC code and mm is the modR/M byte. * xy byte seems to be encoded as ss011xxx or ss000xxx * ss= segment override. * 00 -> DS * 01 -> SS * 10 -> CS * 11 -> ES * * 11011xxx should be the opcode instruction. */ void WINAPI DOSVM_Int3cHandler(CONTEXT *context) { FIXME("Int 3C NOT Implemented\n"); INT_BARF(context, 0x3c); } /********************************************************************** * DOSVM_Int3dHandler * * Handler for int 3D (FLOATING POINT EMULATION - Standalone FWAIT). * * Opcode 0x90 is a NOP. It just fills space where the 3D was. */ void WINAPI DOSVM_Int3dHandler(CONTEXT *context) { TRACE("Int 0x3d called-- Standalone FWAIT\n"); FPU_ModifyCode(context, 0x90); } /********************************************************************** * DOSVM_Int3eHandler * * FLOATING POINT EMULATION -- Borland "Shortcut" call. * The two bytes following the int 3E instruction are * the subcode and a NOP ( 0x90 ), except for subcodes DC and DE * where the second byte is the register count. * * Direct access 4.0 modifies and does not restore this vector. * */ void WINAPI DOSVM_Int3eHandler(CONTEXT *context) { FIXME("Int 3E NOT Implemented\n"); INT_BARF(context, 0x3e); } /********************************************************************** * FPU_ModifyCode * * This is the function that inserts the 0x9b fwait instruction * and the actual FPU opcode into the program. * -A.C. * * Code thanks to Ove Kaaven */ static void FPU_ModifyCode(CONTEXT *context, BYTE Opcode) { BYTE *code = CTX_SEG_OFF_TO_LIN(context, context->SegCs, context->Eip); /* * All *NIX systems should have a real or kernel emulated FPU. */ code[-2] = 0x9b; /* The fwait instruction */ code[-1] = Opcode; /* Insert the opcode */ if ( ISV86(context) && LOWORD(context->Eip) < 2 ) FIXME("Backed up over a real mode segment boundary in FPU code.\n"); context->Eip -= 2; /* back up the return address 2 bytes */ TRACE("Modified code in FPU int call to 0x9b 0x%x\n",Opcode); }