607 lines
20 KiB
C
607 lines
20 KiB
C
/*
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* Interrupt emulation
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*
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* Copyright 2002 Jukka Heinonen
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "dosexe.h"
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#include "wine/debug.h"
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#include "wine/winbase16.h"
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#include "thread.h"
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#ifdef HAVE_SYS_VM86_H
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# include <sys/vm86.h>
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#endif
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#ifndef IF_MASK
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#define IF_MASK 0x00000200
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#endif
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#ifndef VIF_MASK
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#define VIF_MASK 0x00080000
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#endif
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WINE_DEFAULT_DEBUG_CHANNEL(int);
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WINE_DECLARE_DEBUG_CHANNEL(relay);
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static FARPROC16 DOSVM_Vectors16[256];
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static FARPROC48 DOSVM_Vectors48[256];
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static const INTPROC DOSVM_VectorsBuiltin[] =
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{
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/* 00 */ 0, 0, 0, 0,
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/* 04 */ 0, 0, 0, 0,
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/* 08 */ DOSVM_Int08Handler, DOSVM_Int09Handler, 0, 0,
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/* 0C */ 0, 0, 0, 0,
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/* 10 */ DOSVM_Int10Handler, DOSVM_Int11Handler, DOSVM_Int12Handler, DOSVM_Int13Handler,
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/* 14 */ 0, DOSVM_Int15Handler, DOSVM_Int16Handler, DOSVM_Int17Handler,
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/* 18 */ 0, 0, DOSVM_Int1aHandler, 0,
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/* 1C */ 0, 0, 0, 0,
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/* 20 */ DOSVM_Int20Handler, DOSVM_Int21Handler, 0, 0,
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/* 24 */ 0, DOSVM_Int25Handler, DOSVM_Int26Handler, 0,
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/* 28 */ 0, DOSVM_Int29Handler, DOSVM_Int2aHandler, 0,
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/* 2C */ 0, 0, 0, DOSVM_Int2fHandler,
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/* 30 */ 0, DOSVM_Int31Handler, 0, DOSVM_Int33Handler,
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/* 34 */ DOSVM_Int34Handler, DOSVM_Int35Handler, DOSVM_Int36Handler, DOSVM_Int37Handler,
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/* 38 */ DOSVM_Int38Handler, DOSVM_Int39Handler, DOSVM_Int3aHandler, DOSVM_Int3bHandler,
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/* 3C */ DOSVM_Int3cHandler, DOSVM_Int3dHandler, DOSVM_Int3eHandler, 0,
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/* 40 */ 0, DOSVM_Int41Handler, 0, 0,
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/* 44 */ 0, 0, 0, 0,
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/* 48 */ 0, 0, 0, DOSVM_Int4bHandler,
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/* 4C */ 0, 0, 0, 0,
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/* 50 */ 0, 0, 0, 0,
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/* 54 */ 0, 0, 0, 0,
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/* 58 */ 0, 0, 0, 0,
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/* 5C */ DOSVM_Int5cHandler, 0, 0, 0,
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/* 60 */ 0, 0, 0, 0,
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/* 64 */ 0, 0, 0, DOSVM_Int67Handler
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};
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/*
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* Sizes of real mode and protected mode interrupt stubs.
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*/
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#define DOSVM_STUB_RM 4
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#define DOSVM_STUB_PM16 5
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#define DOSVM_STUB_PM48 6
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/**********************************************************************
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* DOSVM_IsIRQ
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*
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* Return TRUE if interrupt is an IRQ.
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*/
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static BOOL DOSVM_IsIRQ( BYTE intnum )
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{
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if (intnum >= 0x08 && intnum <= 0x0f)
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return TRUE;
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if (intnum >= 0x70 && intnum <= 0x77)
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return TRUE;
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return FALSE;
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}
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/**********************************************************************
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* DOSVM_DefaultHandler
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*
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* Default interrupt handler. This will be used to emulate all
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* interrupts that don't have their own interrupt handler.
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*/
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void WINAPI DOSVM_DefaultHandler( CONTEXT86 *context )
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{
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}
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/**********************************************************************
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* DOSVM_GetBuiltinHandler
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*
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* Return Wine interrupt handler procedure for a given interrupt.
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*/
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static INTPROC DOSVM_GetBuiltinHandler( BYTE intnum )
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{
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if (intnum < sizeof(DOSVM_VectorsBuiltin)/sizeof(INTPROC)) {
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INTPROC proc = DOSVM_VectorsBuiltin[intnum];
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if (proc)
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return proc;
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}
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WARN("int%x not implemented, returning dummy handler\n", intnum );
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if (DOSVM_IsIRQ(intnum))
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return DOSVM_AcknowledgeIRQ;
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return DOSVM_DefaultHandler;
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}
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/**********************************************************************
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* DOSVM_IntProcRelay
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*
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* Simple DOSRELAY that interprets its argument as INTPROC and calls it.
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*/
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static void DOSVM_IntProcRelay( CONTEXT86 *context, LPVOID data )
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{
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INTPROC proc = (INTPROC)data;
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proc(context);
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}
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/**********************************************************************
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* DOSVM_PrepareIRQ
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*
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*/
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static void DOSVM_PrepareIRQ( CONTEXT86 *context, BOOL isbuiltin )
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{
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/* Disable virtual interrupts. */
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NtCurrentTeb()->dpmi_vif = 0;
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if (!isbuiltin)
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{
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DWORD *stack = CTX_SEG_OFF_TO_LIN(context,
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context->SegSs,
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context->Esp);
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/* Push return address to stack. */
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*(--stack) = context->SegCs;
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*(--stack) = context->Eip;
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context->Esp += -8;
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/* Jump to enable interrupts stub. */
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context->SegCs = DOSVM_dpmi_segments->relay_code_sel;
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context->Eip = 5;
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}
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}
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/**********************************************************************
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* DOSVM_PushFlags
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*
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* This routine is used to make default int25 and int26 handlers leave the
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* original eflags into stack. In order to do this, stack is manipulated
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* so that it actually contains two copies of eflags, one of which is
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* popped during return from interrupt handler.
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*/
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static void DOSVM_PushFlags( CONTEXT86 *context, BOOL islong, BOOL isstub )
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{
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if (islong)
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{
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DWORD *stack = CTX_SEG_OFF_TO_LIN(context,
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context->SegSs,
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context->Esp);
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context->Esp += -4; /* One item will be added to stack. */
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if (isstub)
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{
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DWORD ip = stack[0];
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DWORD cs = stack[1];
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stack += 2; /* Pop ip and cs. */
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*(--stack) = context->EFlags;
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*(--stack) = cs;
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*(--stack) = ip;
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}
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else
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*(--stack) = context->EFlags;
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}
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else
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{
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WORD *stack = CTX_SEG_OFF_TO_LIN(context,
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context->SegSs,
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context->Esp);
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ADD_LOWORD( context->Esp, -2 ); /* One item will be added to stack. */
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if (isstub)
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{
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WORD ip = stack[0];
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WORD cs = stack[1];
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stack += 2; /* Pop ip and cs. */
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*(--stack) = LOWORD(context->EFlags);
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*(--stack) = cs;
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*(--stack) = ip;
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}
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else
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*(--stack) = LOWORD(context->EFlags);
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}
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}
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/**********************************************************************
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* DOSVM_EmulateInterruptPM
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*
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* Emulate software interrupt in 16-bit or 32-bit protected mode.
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* Called from signal handler when intXX opcode is executed.
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*
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* Pushes interrupt frame to stack and changes instruction
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* pointer to interrupt handler.
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*/
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void WINAPI DOSVM_EmulateInterruptPM( CONTEXT86 *context, BYTE intnum )
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{
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if (TRACE_ON(relay))
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{
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DPRINTF( "Call DOS int 0x%02x ret=%04lx:%08lx\n",
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intnum, context->SegCs, context->Eip );
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DPRINTF( " eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx\n",
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context->Eax, context->Ebx, context->Ecx, context->Edx );
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DPRINTF( " esi=%08lx edi=%08lx ebp=%08lx esp=%08lx \n",
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context->Esi, context->Edi, context->Ebp, context->Esp );
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DPRINTF( " ds=%04lx es=%04lx fs=%04lx gs=%04lx flags=%08lx\n",
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context->SegDs, context->SegEs,
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context->SegFs, context->SegGs, context->EFlags );
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}
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if (context->SegCs == DOSVM_dpmi_segments->dpmi_sel)
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{
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DOSVM_BuildCallFrame( context,
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DOSVM_IntProcRelay,
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DOSVM_RawModeSwitchHandler );
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}
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else if (context->SegCs == DOSVM_dpmi_segments->relay_code_sel)
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{
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/*
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* This must not be called using DOSVM_BuildCallFrame.
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*/
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DOSVM_RelayHandler( context );
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}
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else if (context->SegCs == DOSVM_dpmi_segments->int48_sel)
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{
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if (intnum != context->Eip / DOSVM_STUB_PM48)
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WARN( "interrupt stub has been modified "
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"(interrupt is %02x, interrupt stub is %02lx)\n",
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intnum, context->Eip/DOSVM_STUB_PM48 );
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TRACE( "builtin interrupt %02x has been branched to\n", intnum );
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if (intnum == 0x25 || intnum == 0x26)
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DOSVM_PushFlags( context, TRUE, TRUE );
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DOSVM_BuildCallFrame( context,
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DOSVM_IntProcRelay,
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DOSVM_GetBuiltinHandler(intnum) );
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}
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else if (context->SegCs == DOSVM_dpmi_segments->int16_sel)
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{
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if (intnum != context->Eip / DOSVM_STUB_PM16)
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WARN( "interrupt stub has been modified "
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"(interrupt is %02x, interrupt stub is %02lx)\n",
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intnum, context->Eip/DOSVM_STUB_PM16 );
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TRACE( "builtin interrupt %02x has been branched to\n", intnum );
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if (intnum == 0x25 || intnum == 0x26)
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DOSVM_PushFlags( context, FALSE, TRUE );
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DOSVM_BuildCallFrame( context,
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DOSVM_IntProcRelay,
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DOSVM_GetBuiltinHandler(intnum) );
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}
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else
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{
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DOSVM_HardwareInterruptPM( context, intnum );
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}
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}
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/**********************************************************************
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* DOSVM_HardwareInterruptPM
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*
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* Emulate call to interrupt handler in 16-bit or 32-bit protected mode.
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*
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* Pushes interrupt frame to stack and changes instruction
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* pointer to interrupt handler.
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*/
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void DOSVM_HardwareInterruptPM( CONTEXT86 *context, BYTE intnum )
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{
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if(DOSVM_IsDos32())
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{
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FARPROC48 addr = DOSVM_GetPMHandler48( intnum );
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if (addr.selector == DOSVM_dpmi_segments->int48_sel)
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{
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TRACE( "builtin interrupt %02lx has been invoked "
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"(through vector %02x)\n",
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addr.offset / DOSVM_STUB_PM48, intnum );
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if (intnum == 0x25 || intnum == 0x26)
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DOSVM_PushFlags( context, TRUE, FALSE );
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else if (DOSVM_IsIRQ(intnum))
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DOSVM_PrepareIRQ( context, TRUE );
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DOSVM_BuildCallFrame( context,
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DOSVM_IntProcRelay,
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DOSVM_GetBuiltinHandler(
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addr.offset/DOSVM_STUB_PM48 ) );
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}
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else
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{
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DWORD *stack;
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TRACE( "invoking hooked interrupt %02x at %04x:%08lx\n",
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intnum, addr.selector, addr.offset );
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if (DOSVM_IsIRQ(intnum))
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DOSVM_PrepareIRQ( context, FALSE );
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/* Push the flags and return address on the stack */
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stack = CTX_SEG_OFF_TO_LIN(context, context->SegSs, context->Esp);
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*(--stack) = context->EFlags;
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*(--stack) = context->SegCs;
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*(--stack) = context->Eip;
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context->Esp += -12;
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/* Jump to the interrupt handler */
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context->SegCs = addr.selector;
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context->Eip = addr.offset;
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}
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}
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else
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{
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FARPROC16 addr = DOSVM_GetPMHandler16( intnum );
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if (SELECTOROF(addr) == DOSVM_dpmi_segments->int16_sel)
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{
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TRACE( "builtin interrupt %02x has been invoked "
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"(through vector %02x)\n",
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OFFSETOF(addr)/DOSVM_STUB_PM16, intnum );
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if (intnum == 0x25 || intnum == 0x26)
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DOSVM_PushFlags( context, FALSE, FALSE );
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else if (DOSVM_IsIRQ(intnum))
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DOSVM_PrepareIRQ( context, TRUE );
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DOSVM_BuildCallFrame( context,
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DOSVM_IntProcRelay,
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DOSVM_GetBuiltinHandler(
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OFFSETOF(addr)/DOSVM_STUB_PM16 ) );
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}
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else
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{
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WORD *stack;
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TRACE( "invoking hooked interrupt %02x at %04x:%04x\n",
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intnum, SELECTOROF(addr), OFFSETOF(addr) );
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if (DOSVM_IsIRQ(intnum))
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DOSVM_PrepareIRQ( context, FALSE );
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/* Push the flags and return address on the stack */
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stack = CTX_SEG_OFF_TO_LIN(context, context->SegSs, context->Esp);
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*(--stack) = LOWORD(context->EFlags);
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*(--stack) = context->SegCs;
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*(--stack) = LOWORD(context->Eip);
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ADD_LOWORD( context->Esp, -6 );
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/* Jump to the interrupt handler */
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context->SegCs = HIWORD(addr);
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context->Eip = LOWORD(addr);
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}
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}
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}
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/**********************************************************************
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* DOSVM_EmulateInterruptRM
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*
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* Emulate software interrupt in real mode.
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* Called from VM86 emulation when intXX opcode is executed.
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*
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* Either calls directly builtin handler or pushes interrupt frame to
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* stack and changes instruction pointer to interrupt handler.
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*
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* Returns FALSE if this interrupt was caused by return
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* from real mode wrapper.
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*/
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BOOL WINAPI DOSVM_EmulateInterruptRM( CONTEXT86 *context, BYTE intnum )
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{
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if (TRACE_ON(relay))
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{
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DPRINTF( "Call DOS int 0x%02x ret=%04lx:%08lx\n",
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intnum, context->SegCs, context->Eip );
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DPRINTF( " eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx\n",
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context->Eax, context->Ebx, context->Ecx, context->Edx );
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DPRINTF( " esi=%08lx edi=%08lx ebp=%08lx esp=%08lx \n",
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context->Esi, context->Edi, context->Ebp, context->Esp );
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DPRINTF( " ds=%04lx es=%04lx fs=%04lx gs=%04lx flags=%08lx\n",
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context->SegDs, context->SegEs,
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context->SegFs, context->SegGs, context->EFlags );
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}
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/* check for our real-mode hooks */
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if (intnum == 0x31)
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{
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/* is this exit from real-mode wrapper */
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if (context->SegCs == DOSVM_dpmi_segments->wrap_seg)
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return FALSE;
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if (DOSVM_CheckWrappers( context ))
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return TRUE;
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}
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/* check if the call is from our fake BIOS interrupt stubs */
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if (context->SegCs==0xf000)
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{
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if (intnum != context->Eip / DOSVM_STUB_RM)
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WARN( "interrupt stub has been modified "
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"(interrupt is %02x, interrupt stub is %02lx)\n",
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intnum, context->Eip/DOSVM_STUB_RM );
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TRACE( "builtin interrupt %02x has been branched to\n", intnum );
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DOSVM_CallBuiltinHandler( context, intnum );
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}
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else
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{
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DOSVM_HardwareInterruptRM( context, intnum );
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}
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return TRUE;
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}
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/**********************************************************************
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* DOSVM_HardwareInterruptRM
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*
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* Emulate call to interrupt handler in real mode.
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*
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* Either calls directly builtin handler or pushes interrupt frame to
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* stack and changes instruction pointer to interrupt handler.
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*/
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void DOSVM_HardwareInterruptRM( CONTEXT86 *context, BYTE intnum )
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{
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FARPROC16 handler = DOSVM_GetRMHandler( intnum );
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/* check if the call goes to an unhooked interrupt */
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if (SELECTOROF(handler) == 0xf000)
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{
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/* if so, call it directly */
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TRACE( "builtin interrupt %02x has been invoked "
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"(through vector %02x)\n",
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OFFSETOF(handler)/DOSVM_STUB_RM, intnum );
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DOSVM_CallBuiltinHandler( context, OFFSETOF(handler)/DOSVM_STUB_RM );
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}
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else
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{
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/* the interrupt is hooked, simulate interrupt in DOS space */
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WORD* stack = PTR_REAL_TO_LIN( context->SegSs, context->Esp );
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WORD flag = LOWORD( context->EFlags );
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TRACE( "invoking hooked interrupt %02x at %04x:%04x\n",
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intnum, SELECTOROF(handler), OFFSETOF(handler) );
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/* Copy virtual interrupt flag to pushed interrupt flag. */
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if (context->EFlags & VIF_MASK)
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flag |= IF_MASK;
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else
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flag &= ~IF_MASK;
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*(--stack) = flag;
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*(--stack) = context->SegCs;
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*(--stack) = LOWORD( context->Eip );
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context->Esp -= 6;
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context->SegCs = SELECTOROF( handler );
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context->Eip = OFFSETOF( handler );
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/* Clear virtual interrupt flag. */
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context->EFlags &= ~VIF_MASK;
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}
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}
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/**********************************************************************
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* DOSVM_GetRMHandler
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*
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* Return the real mode interrupt vector for a given interrupt.
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*/
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FARPROC16 DOSVM_GetRMHandler( BYTE intnum )
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{
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return ((FARPROC16*)0)[intnum];
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}
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/**********************************************************************
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|
* DOSVM_SetRMHandler
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|
*
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|
* Set the real mode interrupt handler for a given interrupt.
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|
*/
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|
void DOSVM_SetRMHandler( BYTE intnum, FARPROC16 handler )
|
|
{
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|
TRACE("Set real mode interrupt vector %02x <- %04x:%04x\n",
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|
intnum, HIWORD(handler), LOWORD(handler) );
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|
((FARPROC16*)0)[intnum] = handler;
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|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* DOSVM_GetPMHandler16
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|
*
|
|
* Return the protected mode interrupt vector for a given interrupt.
|
|
*/
|
|
FARPROC16 DOSVM_GetPMHandler16( BYTE intnum )
|
|
{
|
|
if (!DOSVM_Vectors16[intnum])
|
|
{
|
|
FARPROC16 proc = (FARPROC16)MAKESEGPTR( DOSVM_dpmi_segments->int16_sel,
|
|
DOSVM_STUB_PM16 * intnum );
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|
DOSVM_Vectors16[intnum] = proc;
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|
}
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|
return DOSVM_Vectors16[intnum];
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|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* DOSVM_SetPMHandler16
|
|
*
|
|
* Set the protected mode interrupt handler for a given interrupt.
|
|
*/
|
|
void DOSVM_SetPMHandler16( BYTE intnum, FARPROC16 handler )
|
|
{
|
|
TRACE("Set protected mode interrupt vector %02x <- %04x:%04x\n",
|
|
intnum, HIWORD(handler), LOWORD(handler) );
|
|
DOSVM_Vectors16[intnum] = handler;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* DOSVM_GetPMHandler48
|
|
*
|
|
* Return the protected mode interrupt vector for a given interrupt.
|
|
* Used to get 48-bit pointer for 32-bit interrupt handlers in DPMI32.
|
|
*/
|
|
FARPROC48 DOSVM_GetPMHandler48( BYTE intnum )
|
|
{
|
|
if (!DOSVM_Vectors48[intnum].selector)
|
|
{
|
|
DOSVM_Vectors48[intnum].selector = DOSVM_dpmi_segments->int48_sel;
|
|
DOSVM_Vectors48[intnum].offset = DOSVM_STUB_PM48 * intnum;
|
|
}
|
|
return DOSVM_Vectors48[intnum];
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* DOSVM_SetPMHandler48
|
|
*
|
|
* Set the protected mode interrupt handler for a given interrupt.
|
|
* Used to set 48-bit pointer for 32-bit interrupt handlers in DPMI32.
|
|
*/
|
|
void DOSVM_SetPMHandler48( BYTE intnum, FARPROC48 handler )
|
|
{
|
|
TRACE("Set 32-bit protected mode interrupt vector %02x <- %04x:%08lx\n",
|
|
intnum, handler.selector, handler.offset );
|
|
DOSVM_Vectors48[intnum] = handler;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* DOSVM_CallBuiltinHandler
|
|
*
|
|
* Execute Wine interrupt handler procedure.
|
|
*/
|
|
void WINAPI DOSVM_CallBuiltinHandler( CONTEXT86 *context, BYTE intnum )
|
|
{
|
|
/*
|
|
* FIXME: Make all builtin interrupt calls go via this routine.
|
|
* FIXME: Check for PM->RM interrupt reflection.
|
|
* FIXME: Check for RM->PM interrupt reflection.
|
|
*/
|
|
|
|
INTPROC proc = DOSVM_GetBuiltinHandler( intnum );
|
|
proc( context );
|
|
}
|