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360a3f9142
wine/dlls/winedos/interrupts.c
Jonathan Ernst 360a3f9142 Update the address of the Free Software Foundation.
2006-05-23 14:11:13 +02:00

689 lines
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/*
* Interrupt emulation
*
* Copyright 2002 Jukka Heinonen
*
* 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 "config.h"
#include "dosexe.h"
#include "wine/debug.h"
#include "wine/winbase16.h"
#include "thread.h"
WINE_DEFAULT_DEBUG_CHANNEL(int);
WINE_DECLARE_DEBUG_CHANNEL(relay);
static FARPROC16 DOSVM_Vectors16[256];
static FARPROC48 DOSVM_Vectors48[256];
static const INTPROC DOSVM_VectorsBuiltin[] =
{
/* 00 */ 0, 0, 0, 0,
/* 04 */ 0, 0, 0, 0,
/* 08 */ DOSVM_Int08Handler, DOSVM_Int09Handler, 0, 0,
/* 0C */ 0, 0, 0, 0,
/* 10 */ DOSVM_Int10Handler, DOSVM_Int11Handler, DOSVM_Int12Handler, DOSVM_Int13Handler,
/* 14 */ 0, DOSVM_Int15Handler, DOSVM_Int16Handler, DOSVM_Int17Handler,
/* 18 */ 0, DOSVM_Int19Handler, DOSVM_Int1aHandler, 0,
/* 1C */ 0, 0, 0, 0,
/* 20 */ DOSVM_Int20Handler, DOSVM_Int21Handler, 0, 0,
/* 24 */ 0, DOSVM_Int25Handler, DOSVM_Int26Handler, 0,
/* 28 */ 0, DOSVM_Int29Handler, DOSVM_Int2aHandler, 0,
/* 2C */ 0, 0, 0, DOSVM_Int2fHandler,
/* 30 */ 0, DOSVM_Int31Handler, 0, DOSVM_Int33Handler,
/* 34 */ DOSVM_Int34Handler, DOSVM_Int35Handler, DOSVM_Int36Handler, DOSVM_Int37Handler,
/* 38 */ DOSVM_Int38Handler, DOSVM_Int39Handler, DOSVM_Int3aHandler, DOSVM_Int3bHandler,
/* 3C */ DOSVM_Int3cHandler, DOSVM_Int3dHandler, DOSVM_Int3eHandler, 0,
/* 40 */ 0, DOSVM_Int41Handler, 0, 0,
/* 44 */ 0, 0, 0, 0,
/* 48 */ 0, 0, 0, DOSVM_Int4bHandler,
/* 4C */ 0, 0, 0, 0,
/* 50 */ 0, 0, 0, 0,
/* 54 */ 0, 0, 0, 0,
/* 58 */ 0, 0, 0, 0,
/* 5C */ DOSVM_Int5cHandler, 0, 0, 0,
/* 60 */ 0, 0, 0, 0,
/* 64 */ 0, 0, 0, DOSVM_Int67Handler
};
/*
* Sizes of real mode and protected mode interrupt stubs.
*/
#define DOSVM_STUB_RM 4
#define DOSVM_STUB_PM16 5
#define DOSVM_STUB_PM48 6
/**********************************************************************
* DOSVM_GetRMVector
*
* Return pointer to real mode interrupt vector. These are not at fixed
* location because those Win16 programs that do not use any real mode
* code have protected NULL pointer catching block at low linear memory
* and interrupt vectors have been moved to another location.
*/
static FARPROC16* DOSVM_GetRMVector( BYTE intnum )
{
LDT_ENTRY entry;
FARPROC16 proc;
proc = GetProcAddress16( GetModuleHandle16( "KERNEL" ),
(LPCSTR)(ULONG_PTR)183 );
wine_ldt_get_entry( LOWORD(proc), &entry );
return (FARPROC16*)wine_ldt_get_base( &entry ) + intnum;
}
/**********************************************************************
* DOSVM_IsIRQ
*
* Return TRUE if interrupt is an IRQ.
*/
static BOOL DOSVM_IsIRQ( BYTE intnum )
{
if (intnum >= 0x08 && intnum <= 0x0f)
return TRUE;
if (intnum >= 0x70 && intnum <= 0x77)
return TRUE;
return FALSE;
}
/**********************************************************************
* DOSVM_DefaultHandler
*
* Default interrupt handler. This will be used to emulate all
* interrupts that don't have their own interrupt handler.
*/
void WINAPI DOSVM_DefaultHandler( CONTEXT86 *context )
{
}
/**********************************************************************
* DOSVM_GetBuiltinHandler
*
* Return Wine interrupt handler procedure for a given interrupt.
*/
static INTPROC DOSVM_GetBuiltinHandler( BYTE intnum )
{
if (intnum < sizeof(DOSVM_VectorsBuiltin)/sizeof(INTPROC)) {
INTPROC proc = DOSVM_VectorsBuiltin[intnum];
if (proc)
return proc;
}
WARN("int%x not implemented, returning dummy handler\n", intnum );
if (DOSVM_IsIRQ(intnum))
return DOSVM_AcknowledgeIRQ;
return DOSVM_DefaultHandler;
}
/**********************************************************************
* DOSVM_IntProcRelay
*
* Simple DOSRELAY that interprets its argument as INTPROC and calls it.
*/
static void DOSVM_IntProcRelay( CONTEXT86 *context, LPVOID data )
{
INTPROC proc = (INTPROC)data;
proc(context);
}
/**********************************************************************
* DOSVM_PrepareIRQ
*
*/
static void DOSVM_PrepareIRQ( CONTEXT86 *context, BOOL isbuiltin )
{
/* Disable virtual interrupts. */
NtCurrentTeb()->dpmi_vif = 0;
if (!isbuiltin)
{
DWORD *stack = CTX_SEG_OFF_TO_LIN(context,
context->SegSs,
context->Esp);
/* Push return address to stack. */
*(--stack) = context->SegCs;
*(--stack) = context->Eip;
context->Esp += -8;
/* Jump to enable interrupts stub. */
context->SegCs = DOSVM_dpmi_segments->relay_code_sel;
context->Eip = 5;
}
}
/**********************************************************************
* DOSVM_PushFlags
*
* This routine is used to make default int25 and int26 handlers leave the
* original eflags into stack. In order to do this, stack is manipulated
* so that it actually contains two copies of eflags, one of which is
* popped during return from interrupt handler.
*/
static void DOSVM_PushFlags( CONTEXT86 *context, BOOL islong, BOOL isstub )
{
if (islong)
{
DWORD *stack = CTX_SEG_OFF_TO_LIN(context,
context->SegSs,
context->Esp);
context->Esp += -4; /* One item will be added to stack. */
if (isstub)
{
DWORD ip = stack[0];
DWORD cs = stack[1];
stack += 2; /* Pop ip and cs. */
*(--stack) = context->EFlags;
*(--stack) = cs;
*(--stack) = ip;
}
else
*(--stack) = context->EFlags;
}
else
{
WORD *stack = CTX_SEG_OFF_TO_LIN(context,
context->SegSs,
context->Esp);
ADD_LOWORD( context->Esp, -2 ); /* One item will be added to stack. */
if (isstub)
{
WORD ip = stack[0];
WORD cs = stack[1];
stack += 2; /* Pop ip and cs. */
*(--stack) = LOWORD(context->EFlags);
*(--stack) = cs;
*(--stack) = ip;
}
else
*(--stack) = LOWORD(context->EFlags);
}
}
/**********************************************************************
* DOSVM_EmulateInterruptPM
*
* Emulate software interrupt in 16-bit or 32-bit protected mode.
* Called from signal handler when intXX opcode is executed.
*
* Pushes interrupt frame to stack and changes instruction
* pointer to interrupt handler.
*/
void WINAPI DOSVM_EmulateInterruptPM( CONTEXT86 *context, BYTE intnum )
{
TRACE_(relay)("Call DOS int 0x%02x ret=%04lx:%08lx\n"
" eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx\n"
" esi=%08lx edi=%08lx ebp=%08lx esp=%08lx \n"
" ds=%04lx es=%04lx fs=%04lx gs=%04lx ss=%04lx flags=%08lx\n",
intnum, context->SegCs, context->Eip,
context->Eax, context->Ebx, context->Ecx, context->Edx,
context->Esi, context->Edi, context->Ebp, context->Esp,
context->SegDs, context->SegEs, context->SegFs, context->SegGs,
context->SegSs, context->EFlags );
if (context->SegCs == DOSVM_dpmi_segments->dpmi_sel)
{
DOSVM_BuildCallFrame( context,
DOSVM_IntProcRelay,
DOSVM_RawModeSwitchHandler );
}
else if (context->SegCs == DOSVM_dpmi_segments->relay_code_sel)
{
/*
* This must not be called using DOSVM_BuildCallFrame.
*/
DOSVM_RelayHandler( context );
}
else if (context->SegCs == DOSVM_dpmi_segments->int48_sel)
{
/* Restore original flags stored into the stack by the caller. */
DWORD *stack = CTX_SEG_OFF_TO_LIN(context,
context->SegSs, context->Esp);
context->EFlags = stack[2];
if (intnum != context->Eip / DOSVM_STUB_PM48)
WARN( "interrupt stub has been modified "
"(interrupt is %02x, interrupt stub is %02lx)\n",
intnum, context->Eip/DOSVM_STUB_PM48 );
TRACE( "builtin interrupt %02x has been branched to\n", intnum );
if (intnum == 0x25 || intnum == 0x26)
DOSVM_PushFlags( context, TRUE, TRUE );
DOSVM_BuildCallFrame( context,
DOSVM_IntProcRelay,
DOSVM_GetBuiltinHandler(intnum) );
}
else if (context->SegCs == DOSVM_dpmi_segments->int16_sel)
{
/* Restore original flags stored into the stack by the caller. */
WORD *stack = CTX_SEG_OFF_TO_LIN(context,
context->SegSs, context->Esp);
context->EFlags = (DWORD)MAKELONG( stack[2], HIWORD(context->EFlags) );
if (intnum != context->Eip / DOSVM_STUB_PM16)
WARN( "interrupt stub has been modified "
"(interrupt is %02x, interrupt stub is %02lx)\n",
intnum, context->Eip/DOSVM_STUB_PM16 );
TRACE( "builtin interrupt %02x has been branched to\n", intnum );
if (intnum == 0x25 || intnum == 0x26)
DOSVM_PushFlags( context, FALSE, TRUE );
DOSVM_BuildCallFrame( context,
DOSVM_IntProcRelay,
DOSVM_GetBuiltinHandler(intnum) );
}
else
{
DOSVM_HardwareInterruptPM( context, intnum );
}
}
/**********************************************************************
* DOSVM_HardwareInterruptPM
*
* Emulate call to interrupt handler in 16-bit or 32-bit protected mode.
*
* Pushes interrupt frame to stack and changes instruction
* pointer to interrupt handler.
*/
void DOSVM_HardwareInterruptPM( CONTEXT86 *context, BYTE intnum )
{
if(DOSVM_IsDos32())
{
FARPROC48 addr = DOSVM_GetPMHandler48( intnum );
if (addr.selector == DOSVM_dpmi_segments->int48_sel)
{
TRACE( "builtin interrupt %02lx has been invoked "
"(through vector %02x)\n",
addr.offset / DOSVM_STUB_PM48, intnum );
if (intnum == 0x25 || intnum == 0x26)
DOSVM_PushFlags( context, TRUE, FALSE );
else if (DOSVM_IsIRQ(intnum))
DOSVM_PrepareIRQ( context, TRUE );
DOSVM_BuildCallFrame( context,
DOSVM_IntProcRelay,
DOSVM_GetBuiltinHandler(
addr.offset/DOSVM_STUB_PM48 ) );
}
else
{
DWORD *stack;
TRACE( "invoking hooked interrupt %02x at %04x:%08lx\n",
intnum, addr.selector, addr.offset );
if (DOSVM_IsIRQ(intnum))
DOSVM_PrepareIRQ( context, FALSE );
/* Push the flags and return address on the stack */
stack = CTX_SEG_OFF_TO_LIN(context, context->SegSs, context->Esp);
*(--stack) = context->EFlags;
*(--stack) = context->SegCs;
*(--stack) = context->Eip;
context->Esp += -12;
/* Jump to the interrupt handler */
context->SegCs = addr.selector;
context->Eip = addr.offset;
}
}
else
{
FARPROC16 addr = DOSVM_GetPMHandler16( intnum );
if (SELECTOROF(addr) == DOSVM_dpmi_segments->int16_sel)
{
TRACE( "builtin interrupt %02x has been invoked "
"(through vector %02x)\n",
OFFSETOF(addr)/DOSVM_STUB_PM16, intnum );
if (intnum == 0x25 || intnum == 0x26)
DOSVM_PushFlags( context, FALSE, FALSE );
else if (DOSVM_IsIRQ(intnum))
DOSVM_PrepareIRQ( context, TRUE );
DOSVM_BuildCallFrame( context,
DOSVM_IntProcRelay,
DOSVM_GetBuiltinHandler(
OFFSETOF(addr)/DOSVM_STUB_PM16 ) );
}
else
{
TRACE( "invoking hooked interrupt %02x at %04x:%04x\n",
intnum, SELECTOROF(addr), OFFSETOF(addr) );
if (DOSVM_IsIRQ(intnum))
DOSVM_PrepareIRQ( context, FALSE );
/* Push the flags and return address on the stack */
PUSH_WORD16( context, LOWORD(context->EFlags) );
PUSH_WORD16( context, context->SegCs );
PUSH_WORD16( context, LOWORD(context->Eip) );
/* Jump to the interrupt handler */
context->SegCs = HIWORD(addr);
context->Eip = LOWORD(addr);
}
}
}
/**********************************************************************
* DOSVM_EmulateInterruptRM
*
* Emulate software interrupt in real mode.
* Called from VM86 emulation when intXX opcode is executed.
*
* Either calls directly builtin handler or pushes interrupt frame to
* stack and changes instruction pointer to interrupt handler.
*
* Returns FALSE if this interrupt was caused by return
* from real mode wrapper.
*/
BOOL WINAPI DOSVM_EmulateInterruptRM( CONTEXT86 *context, BYTE intnum )
{
TRACE_(relay)("Call DOS int 0x%02x ret=%04lx:%08lx\n"
" eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx\n"
" esi=%08lx edi=%08lx ebp=%08lx esp=%08lx \n"
" ds=%04lx es=%04lx fs=%04lx gs=%04lx ss=%04lx flags=%08lx\n",
intnum, context->SegCs, context->Eip,
context->Eax, context->Ebx, context->Ecx, context->Edx,
context->Esi, context->Edi, context->Ebp, context->Esp,
context->SegDs, context->SegEs, context->SegFs, context->SegGs,
context->SegSs, context->EFlags );
/* check for our real-mode hooks */
if (intnum == 0x31)
{
/* is this exit from real-mode wrapper */
if (context->SegCs == DOSVM_dpmi_segments->wrap_seg)
return FALSE;
if (DOSVM_CheckWrappers( context ))
return TRUE;
}
/* check if the call is from our fake BIOS interrupt stubs */
if (context->SegCs==0xf000)
{
/* Restore original flags stored into the stack by the caller. */
WORD *stack = CTX_SEG_OFF_TO_LIN(context,
context->SegSs, context->Esp);
context->EFlags = (DWORD)MAKELONG( stack[2], HIWORD(context->EFlags) );
if (intnum != context->Eip / DOSVM_STUB_RM)
WARN( "interrupt stub has been modified "
"(interrupt is %02x, interrupt stub is %02lx)\n",
intnum, context->Eip/DOSVM_STUB_RM );
TRACE( "builtin interrupt %02x has been branched to\n", intnum );
DOSVM_CallBuiltinHandler( context, intnum );
/* Real mode stubs use IRET so we must put flags back into stack. */
stack[2] = LOWORD(context->EFlags);
}
else
{
DOSVM_HardwareInterruptRM( context, intnum );
}
return TRUE;
}
/**********************************************************************
* DOSVM_HardwareInterruptRM
*
* Emulate call to interrupt handler in real mode.
*
* Either calls directly builtin handler or pushes interrupt frame to
* stack and changes instruction pointer to interrupt handler.
*/
void DOSVM_HardwareInterruptRM( CONTEXT86 *context, BYTE intnum )
{
FARPROC16 handler = DOSVM_GetRMHandler( intnum );
/* check if the call goes to an unhooked interrupt */
if (SELECTOROF(handler) == 0xf000)
{
/* if so, call it directly */
TRACE( "builtin interrupt %02x has been invoked "
"(through vector %02x)\n",
OFFSETOF(handler)/DOSVM_STUB_RM, intnum );
DOSVM_CallBuiltinHandler( context, OFFSETOF(handler)/DOSVM_STUB_RM );
}
else
{
/* the interrupt is hooked, simulate interrupt in DOS space */
WORD flag = LOWORD( context->EFlags );
TRACE( "invoking hooked interrupt %02x at %04x:%04x\n",
intnum, SELECTOROF(handler), OFFSETOF(handler) );
/* Copy virtual interrupt flag to pushed interrupt flag. */
if (context->EFlags & VIF_MASK)
flag |= IF_MASK;
else
flag &= ~IF_MASK;
PUSH_WORD16( context, flag );
PUSH_WORD16( context, context->SegCs );
PUSH_WORD16( context, LOWORD( context->Eip ));
context->SegCs = SELECTOROF( handler );
context->Eip = OFFSETOF( handler );
/* Clear virtual interrupt flag and trap flag. */
context->EFlags &= ~(VIF_MASK | TF_MASK);
}
}
/**********************************************************************
* DOSVM_GetRMHandler
*
* Return the real mode interrupt vector for a given interrupt.
*/
FARPROC16 DOSVM_GetRMHandler( BYTE intnum )
{
return *DOSVM_GetRMVector( intnum );
}
/**********************************************************************
* DOSVM_SetRMHandler
*
* Set the real mode interrupt handler for a given interrupt.
*/
void DOSVM_SetRMHandler( BYTE intnum, FARPROC16 handler )
{
TRACE("Set real mode interrupt vector %02x <- %04x:%04x\n",
intnum, HIWORD(handler), LOWORD(handler) );
*DOSVM_GetRMVector( intnum ) = handler;
}
/**********************************************************************
* DOSVM_GetPMHandler16
*
* Return the protected mode interrupt vector for a given interrupt.
*/
FARPROC16 DOSVM_GetPMHandler16( BYTE intnum )
{
TDB *pTask;
FARPROC16 proc = 0;
pTask = GlobalLock16(GetCurrentTask());
if (pTask)
{
switch( intnum )
{
case 0x00:
proc = pTask->int0;
break;
case 0x02:
proc = pTask->int2;
break;
case 0x04:
proc = pTask->int4;
break;
case 0x06:
proc = pTask->int6;
break;
case 0x07:
proc = pTask->int7;
break;
case 0x3e:
proc = pTask->int3e;
break;
case 0x75:
proc = pTask->int75;
break;
}
if( proc )
return proc;
}
if (!DOSVM_Vectors16[intnum])
{
proc = (FARPROC16)MAKESEGPTR( DOSVM_dpmi_segments->int16_sel,
DOSVM_STUB_PM16 * intnum );
DOSVM_Vectors16[intnum] = proc;
}
return DOSVM_Vectors16[intnum];
}
/**********************************************************************
* DOSVM_SetPMHandler16
*
* Set the protected mode interrupt handler for a given interrupt.
*/
void DOSVM_SetPMHandler16( BYTE intnum, FARPROC16 handler )
{
TDB *pTask;
TRACE("Set protected mode interrupt vector %02x <- %04x:%04x\n",
intnum, HIWORD(handler), LOWORD(handler) );
pTask = GlobalLock16(GetCurrentTask());
if (!pTask)
return;
switch( intnum )
{
case 0x00:
pTask->int0 = handler;
break;
case 0x02:
pTask->int2 = handler;
break;
case 0x04:
pTask->int4 = handler;
break;
case 0x06:
pTask->int6 = handler;
break;
case 0x07:
pTask->int7 = handler;
break;
case 0x3e:
pTask->int3e = handler;
break;
case 0x75:
pTask->int75 = handler;
break;
default:
DOSVM_Vectors16[intnum] = handler;
break;
}
}
/**********************************************************************
* 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 );
}
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