2 * DOS interrupt 34->3e handlers. All FPU interrupt code should be
3 * moved into this file.
4 * int 3d is not activated yet...
6 * Copyright 2002 Robert 'Admiral' Coeyman
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 #include "wine/debug.h"
28 WINE_DEFAULT_DEBUG_CHANNEL(int);
31 * The actual work is done by a single routine.
34 static void FPU_ModifyCode(CONTEXT86 *context, BYTE Opcode);
38 /**********************************************************************
39 * INT_Int34Handler (WPROCS.152)
41 * Handler for int 34 (FLOATING POINT EMULATION - Opcode 0xd8).
43 * The interrupt list isn't specific about what this interrupt
44 * actually does. [ interrup.m ]
46 void WINAPI INT_Int34Handler(CONTEXT86 *context)
49 TRACE("Int 0x34 called-- FP opcode 0xd8");
50 FPU_ModifyCode(context, 0xd8);
54 /**********************************************************************
55 * INT_Int35Handler (WPROCS.153)
57 * Handler for int 35 (FLOATING POINT EMULATION - Opcode 0xd9).
59 * The interrupt list isn't specific about what this interrupt
60 * actually does. [ interrup.m ]
62 void WINAPI INT_Int35Handler(CONTEXT86 *context)
64 TRACE("Int 0x35 called-- FP opcode 0xd9");
65 FPU_ModifyCode(context, 0xd9);
70 /**********************************************************************
71 * INT_Int36Handler (WPROCS.154)
73 * Handler for int 36 (FLOATING POINT EMULATION - Opcode 0xda).
75 * The interrupt list isn't specific about what this interrupt
76 * actually does. [ interrup.m ]
78 void WINAPI INT_Int36Handler(CONTEXT86 *context)
80 TRACE("Int 0x36 called-- FP opcode 0xda");
81 FPU_ModifyCode(context, 0xda);
85 /**********************************************************************
86 * INT_Int37Handler (WPROCS.155)
88 * Handler for int 37 (FLOATING POINT EMULATION - Opcode 0xdb).
90 * The interrupt list isn't specific about what this interrupt
91 * actually does. [ interrup.m ]
93 void WINAPI INT_Int37Handler(CONTEXT86 *context)
95 TRACE("Int 0x37 called-- FP opcode 0xdb");
96 FPU_ModifyCode(context, 0xdb);
100 /**********************************************************************
101 * INT_Int38Handler (WPROCS.156)
103 * Handler for int 38 (FLOATING POINT EMULATION - Opcode 0xdc).
105 * Between versions 3.0 and 5.01, the original PC-MOS API call that
106 * was here was moved to int 0xd4.
108 * The interrupt list isn't specific about what this interrupt
109 * actually does. [ interrup.m ]
111 void WINAPI INT_Int38Handler(CONTEXT86 *context)
113 TRACE("Int 0x38 called-- FP opcode 0xdc");
114 FPU_ModifyCode(context, 0xdc);
118 /**********************************************************************
119 * INT_Int39Handler (WPROCS.157)
121 * Handler for int 39 (FLOATING POINT EMULATION - Opcode 0xdd).
123 * The interrupt list isn't specific about what this interrupt
124 * actually does. [ interrup.m ]
126 void WINAPI INT_Int39Handler(CONTEXT86 *context)
128 TRACE("Int 0x39 called-- FP opcode 0xdd");
129 FPU_ModifyCode(context, 0xdd);
133 /**********************************************************************
134 * INT_Int3aHandler (WPROCS.158)
136 * Handler for int 3a (FLOATING POINT EMULATION - Opcode 0xde).
138 * The interrupt list isn't specific about what this interrupt
139 * actually does. [ interrup.m ]
141 void WINAPI INT_Int3aHandler(CONTEXT86 *context)
143 TRACE("Int 0x3a called-- FP opcode 0xde");
144 FPU_ModifyCode(context, 0xde);
148 /**********************************************************************
149 * INT_Int3bHandler (WPROCS.159)
151 * Handler for int 3B (FLOATING POINT EMULATION - Opcode 0xdf).
153 * The interrupt list isn't specific about what this interrupt
154 * actually does. [ interrup.m ]
156 void WINAPI INT_Int3bHandler(CONTEXT86 *context)
158 TRACE("Int 0x3b called-- FP opcode 0xdf");
159 FPU_ModifyCode(context, 0xdf);
165 /**********************************************************************
166 * INT_Int3cHandler (WPROCS.160)
168 * Handler for int 3C (FLOATING POINT EMULATION - INSTRUCTIONS WITH SEGMENT OVERRIDE).
170 * Generated code is CD 3C xy mm ... (CD = int | 3C = this interrupt)
171 * xy is a modified ESC code and mm is the modR/M byte.
172 * xy byte seems to be encoded as ss011xxx or ss000xxx
173 * ss= segment override.
179 * 11011xxx should be the opcode instruction.
181 void WINAPI INT_Int3cHandler(CONTEXT86 *context)
183 FIXME("Int 3C NOT Implemented");
184 INT_BARF(context, 0x3c);
187 /**********************************************************************
188 * INT_Int3dHandler (WPROCS.161)
190 * Handler for int 3D (FLOATING POINT EMULATION - Standalone FWAIT).
192 * Opcode 0x90 is a NOP. It just fills space where the 3D was.
194 void WINAPI INT_Int3dHandler(CONTEXT86 *context)
196 TRACE("Int 0x3d called-- Standalone FWAIT");
197 FPU_ModifyCode(context, 0x90);
203 /**********************************************************************
204 * INT_Int3eHandler (WPROCS.162)
206 * FLOATING POINT EMULATION -- Borland "Shortcut" call.
207 * The two bytes following the int 3E instruction are
208 * the subcode and a NOP ( 0x90 ), except for subcodes DC and DE
209 * where the second byte is the register count.
211 * Direct access 4.0 modifies and does not restore this vector.
214 void WINAPI INT_Int3eHandler(CONTEXT86 *context)
216 FIXME("Int 3E NOT Implemented");
217 INT_BARF(context, 0x3e);
220 /**********************************************************************
223 * This is the function that inserts the 0x9b fwait instruction
224 * and the actual FPU opcode into the program.
227 * Code thanks to Ove Kaaven
229 static void FPU_ModifyCode(CONTEXT86 *context, BYTE Opcode)
231 WORD *stack = CTX_SEG_OFF_TO_LIN(context, context->SegSs, context->Esp);
232 BYTE *code = CTX_SEG_OFF_TO_LIN(context, stack[1], stack[0]);
235 * All *NIX systems should have a real or kernel emulated FPU.
238 code[-2] = 0x9b; /* The fwait instruction */
239 code[-1] = Opcode; /* Insert the opcode */
241 if ( stack[0] < 2 ) FIXME("Backed up over a segment boundry in FPU code.");
243 stack[0] -= 2; /* back up the return address 2 bytes */
245 TRACE("Modified code in FPU int call to 0x9b 0x%x",Opcode);