/* * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "dosexe.h" #include "wine/debug.h" #include "wine/winbase16.h" #include "thread.h" #ifdef HAVE_SYS_VM86_H # include #endif #ifndef IF_MASK #define IF_MASK 0x00000200 #endif #ifndef VIF_MASK #define VIF_MASK 0x00080000 #endif 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, 0, 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_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 ) { if (TRACE_ON(relay)) { DPRINTF( "Call DOS int 0x%02x ret=%04lx:%08lx\n", intnum, context->SegCs, context->Eip ); DPRINTF( " eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx\n", context->Eax, context->Ebx, context->Ecx, context->Edx ); DPRINTF( " esi=%08lx edi=%08lx ebp=%08lx esp=%08lx \n", context->Esi, context->Edi, context->Ebp, context->Esp ); DPRINTF( " ds=%04lx es=%04lx fs=%04lx gs=%04lx flags=%08lx\n", context->SegDs, context->SegEs, context->SegFs, context->SegGs, 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) { 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) { 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 { WORD *stack; 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 */ stack = CTX_SEG_OFF_TO_LIN(context, context->SegSs, context->Esp); *(--stack) = LOWORD(context->EFlags); *(--stack) = context->SegCs; *(--stack) = LOWORD(context->Eip); ADD_LOWORD( context->Esp, -6 ); /* 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 ) { if (TRACE_ON(relay)) { DPRINTF( "Call DOS int 0x%02x ret=%04lx:%08lx\n", intnum, context->SegCs, context->Eip ); DPRINTF( " eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx\n", context->Eax, context->Ebx, context->Ecx, context->Edx ); DPRINTF( " esi=%08lx edi=%08lx ebp=%08lx esp=%08lx \n", context->Esi, context->Edi, context->Ebp, context->Esp ); DPRINTF( " ds=%04lx es=%04lx fs=%04lx gs=%04lx flags=%08lx\n", context->SegDs, context->SegEs, context->SegFs, context->SegGs, 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) { 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 ); } 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* stack = PTR_REAL_TO_LIN( context->SegSs, context->Esp ); 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; *(--stack) = flag; *(--stack) = context->SegCs; *(--stack) = LOWORD( context->Eip ); context->Esp -= 6; context->SegCs = SELECTOROF( handler ); context->Eip = OFFSETOF( handler ); /* Clear virtual interrupt flag. */ context->EFlags &= ~VIF_MASK; } } /********************************************************************** * DOSVM_GetRMHandler * * Return the real mode interrupt vector for a given interrupt. */ FARPROC16 DOSVM_GetRMHandler( BYTE intnum ) { return ((FARPROC16*)0)[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) ); ((FARPROC16*)0)[intnum] = handler; } /********************************************************************** * DOSVM_GetPMHandler16 * * 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 ); 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 ) { 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 ); }