/* * DPMI 0.9 emulation * * Copyright 1995 Alexandre Julliard * * 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 "config.h" #include "wine/port.h" #include "windef.h" #include "wine/winbase16.h" #include "miscemu.h" #include "task.h" #include "msdos.h" #include "dosexe.h" #include "wine/debug.h" #include "stackframe.h" #include "toolhelp.h" WINE_DEFAULT_DEBUG_CHANNEL(int31); /* Structure for real-mode callbacks */ typedef struct { DWORD edi; DWORD esi; DWORD ebp; DWORD reserved; DWORD ebx; DWORD edx; DWORD ecx; DWORD eax; WORD fl; WORD es; WORD ds; WORD fs; WORD gs; WORD ip; WORD cs; WORD sp; WORD ss; } REALMODECALL; typedef struct tagRMCB { DWORD address; DWORD proc_ofs,proc_sel; DWORD regs_ofs,regs_sel; struct tagRMCB *next; } RMCB; static RMCB *FirstRMCB = NULL; static WORD dpmi_flag; static void* lastvalloced = NULL; /********************************************************************** * DOSVM_IsDos32 * * Return TRUE if we are in 32-bit protected mode DOS process. */ BOOL DOSVM_IsDos32(void) { return (dpmi_flag & 1) ? TRUE : FALSE; } /********************************************************************** * INT_GetRealModeContext */ static void INT_GetRealModeContext( REALMODECALL *call, CONTEXT86 *context ) { context->Eax = call->eax; context->Ebx = call->ebx; context->Ecx = call->ecx; context->Edx = call->edx; context->Esi = call->esi; context->Edi = call->edi; context->Ebp = call->ebp; context->EFlags = call->fl | V86_FLAG; context->Eip = call->ip; context->Esp = call->sp; context->SegCs = call->cs; context->SegDs = call->ds; context->SegEs = call->es; context->SegFs = call->fs; context->SegGs = call->gs; context->SegSs = call->ss; } /********************************************************************** * INT_SetRealModeContext */ static void INT_SetRealModeContext( REALMODECALL *call, CONTEXT86 *context ) { call->eax = context->Eax; call->ebx = context->Ebx; call->ecx = context->Ecx; call->edx = context->Edx; call->esi = context->Esi; call->edi = context->Edi; call->ebp = context->Ebp; call->fl = LOWORD(context->EFlags); call->ip = LOWORD(context->Eip); call->sp = LOWORD(context->Esp); call->cs = context->SegCs; call->ds = context->SegDs; call->es = context->SegEs; call->fs = context->SegFs; call->gs = context->SegGs; call->ss = context->SegSs; } /********************************************************************** * DPMI_xalloc * special virtualalloc, allocates lineary monoton growing memory. * (the usual VirtualAlloc does not satisfy that restriction) */ static LPVOID DPMI_xalloc( DWORD len ) { LPVOID ret; LPVOID oldlastv = lastvalloced; if (lastvalloced) { int xflag = 0; ret = NULL; while (!ret) { ret = VirtualAlloc( lastvalloced, len, MEM_COMMIT|MEM_RESERVE, PAGE_EXECUTE_READWRITE ); if (!ret) lastvalloced = (char *) lastvalloced + 0x10000; /* we failed to allocate one in the first round. * try non-linear */ if (!xflag && (lastvalloced= oldlastv)) xflag++; if ((xflag==2) && (lastvalloced < oldlastv)) { FIXME( "failed to allocate any memory of %ld bytes!\n", len ); return NULL; } } } else { ret = VirtualAlloc( NULL, len, MEM_COMMIT|MEM_RESERVE, PAGE_EXECUTE_READWRITE ); } lastvalloced = (LPVOID)(((DWORD)ret+len+0xffff)&~0xffff); return ret; } /********************************************************************** * DPMI_xfree */ static void DPMI_xfree( LPVOID ptr ) { VirtualFree( ptr, 0, MEM_RELEASE ); } /********************************************************************** * DPMI_xrealloc * * FIXME: perhaps we could grow this mapped area... */ static LPVOID DPMI_xrealloc( LPVOID ptr, DWORD newsize ) { MEMORY_BASIC_INFORMATION mbi; LPVOID newptr; newptr = DPMI_xalloc( newsize ); if (ptr) { if (!VirtualQuery(ptr,&mbi,sizeof(mbi))) { FIXME( "realloc of DPMI_xallocd region %p?\n", ptr ); return NULL; } if (mbi.State == MEM_FREE) { FIXME( "realloc of DPMI_xallocd region %p?\n", ptr ); return NULL; } /* We do not shrink allocated memory. most reallocs * only do grows anyway */ if (newsize <= mbi.RegionSize) return ptr; memcpy( newptr, ptr, mbi.RegionSize ); DPMI_xfree( ptr ); } return newptr; } #ifdef __i386__ void DPMI_CallRMCB32(RMCB *rmcb, UINT16 ss, DWORD esp, UINT16*es, DWORD*edi) #if 0 /* original code, which early gccs puke on */ { int _clobber; __asm__ __volatile__( "pushl %%ebp\n" "pushl %%ebx\n" "pushl %%es\n" "pushl %%ds\n" "pushfl\n" "mov %7,%%es\n" "mov %5,%%ds\n" ".byte 0x36, 0xff, 0x18\n" /* lcall *%ss:(%eax) */ "popl %%ds\n" "mov %%es,%0\n" "popl %%es\n" "popl %%ebx\n" "popl %%ebp\n" : "=d" (*es), "=D" (*edi), "=S" (_clobber), "=a" (_clobber), "=c" (_clobber) : "0" (ss), "2" (esp), "4" (rmcb->regs_sel), "1" (rmcb->regs_ofs), "3" (&rmcb->proc_ofs) ); } #else /* code generated by a gcc new enough */ ; __ASM_GLOBAL_FUNC(DPMI_CallRMCB32, "pushl %ebp\n\t" "movl %esp,%ebp\n\t" "pushl %edi\n\t" "pushl %esi\n\t" "movl 0x8(%ebp),%eax\n\t" "movl 0x10(%ebp),%esi\n\t" "movl 0xc(%ebp),%edx\n\t" "movl 0x10(%eax),%ecx\n\t" "movl 0xc(%eax),%edi\n\t" "addl $0x4,%eax\n\t" "pushl %ebp\n\t" "pushl %ebx\n\t" "pushl %es\n\t" "pushl %ds\n\t" "pushfl\n\t" "mov %cx,%es\n\t" "mov %dx,%ds\n\t" ".byte 0x36, 0xff, 0x18\n\t" /* lcall *%ss:(%eax) */ "popl %ds\n\t" "mov %es,%dx\n\t" "popl %es\n\t" "popl %ebx\n\t" "popl %ebp\n\t" "movl 0x14(%ebp),%eax\n\t" "movw %dx,(%eax)\n\t" "movl 0x18(%ebp),%edx\n\t" "movl %edi,(%edx)\n\t" "popl %esi\n\t" "popl %edi\n\t" "leave\n\t" "ret") #endif #endif /* __i386__ */ /********************************************************************** * DPMI_CallRMCBProc * * This routine does the hard work of calling a callback procedure. */ static void DPMI_CallRMCBProc( CONTEXT86 *context, RMCB *rmcb, WORD flag ) { if (IS_SELECTOR_SYSTEM( rmcb->proc_sel )) { /* Wine-internal RMCB, call directly */ ((RMCBPROC)rmcb->proc_ofs)(context); } else { #ifdef __i386__ UINT16 ss,es; DWORD esp,edi; INT_SetRealModeContext(MapSL(MAKESEGPTR( rmcb->regs_sel, rmcb->regs_ofs )), context); ss = SELECTOR_AllocBlock( (void *)(context->SegSs<<4), 0x10000, WINE_LDT_FLAGS_DATA ); esp = context->Esp; FIXME("untested!\n"); /* The called proc ends with an IRET, and takes these parameters: * DS:ESI = pointer to real-mode SS:SP * ES:EDI = pointer to real-mode call structure * It returns: * ES:EDI = pointer to real-mode call structure (may be a copy) * It is the proc's responsibility to change the return CS:IP in the * real-mode call structure. */ if (flag & 1) { /* 32-bit DPMI client */ DPMI_CallRMCB32(rmcb, ss, esp, &es, &edi); } else { /* 16-bit DPMI client */ CONTEXT86 ctx = *context; ctx.SegCs = rmcb->proc_sel; ctx.Eip = rmcb->proc_ofs; ctx.SegDs = ss; ctx.Esi = esp; ctx.SegEs = rmcb->regs_sel; ctx.Edi = rmcb->regs_ofs; /* FIXME: I'm pretty sure this isn't right - should push flags first */ wine_call_to_16_regs_short(&ctx, 0); es = ctx.SegEs; edi = ctx.Edi; } FreeSelector16(ss); INT_GetRealModeContext( MapSL( MAKESEGPTR( es, edi )), context); #else ERR("RMCBs only implemented for i386\n"); #endif } } /********************************************************************** * DPMI_CallRMProc * * This routine does the hard work of calling a real mode procedure. */ int DPMI_CallRMProc( CONTEXT86 *context, LPWORD stack, int args, int iret ) { LPWORD stack16; LPVOID addr = NULL; /* avoid gcc warning */ RMCB *CurrRMCB; int alloc = 0, already = 0; BYTE *code; TRACE("EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n", context->Eax, context->Ebx, context->Ecx, context->Edx ); TRACE("ESI=%08lx EDI=%08lx ES=%04lx DS=%04lx CS:IP=%04lx:%04x, %d WORD arguments, %s\n", context->Esi, context->Edi, context->SegEs, context->SegDs, context->SegCs, LOWORD(context->Eip), args, iret?"IRET":"FAR" ); callrmproc_again: /* there might be some code that just jumps to RMCBs or the like, in which case following the jumps here might get us to a shortcut */ code = CTX_SEG_OFF_TO_LIN(context, context->SegCs, context->Eip); switch (*code) { case 0xe9: /* JMP NEAR */ context->Eip += 3 + *(WORD *)(code+1); /* yeah, I know these gotos don't look good... */ goto callrmproc_again; case 0xea: /* JMP FAR */ context->Eip = *(WORD *)(code+1); context->SegCs = *(WORD *)(code+3); /* ...but since the label is there anyway... */ goto callrmproc_again; case 0xeb: /* JMP SHORT */ context->Eip += 2 + *(signed char *)(code+1); /* ...because of other gotos below, so... */ goto callrmproc_again; } /* shortcut for chaining to internal interrupt handlers */ if ((context->SegCs == 0xF000) && iret) { DOSVM_RealModeInterrupt( LOWORD(context->Eip)/4, context); return 0; } /* shortcut for RMCBs */ CurrRMCB = FirstRMCB; while (CurrRMCB && (HIWORD(CurrRMCB->address) != context->SegCs)) CurrRMCB = CurrRMCB->next; if (!CurrRMCB && !MZ_Current()) { FIXME("DPMI real-mode call using DOS VM task system, not fully tested!\n"); TRACE("creating VM86 task\n"); MZ_AllocDPMITask(); } if (!already) { if (!context->SegSs) { alloc = 1; /* allocate default stack */ stack16 = addr = DOSMEM_GetBlock( 64, (UINT16 *)&(context->SegSs) ); context->Esp = 64-2; stack16 += 32-1; if (!addr) { ERR("could not allocate default stack\n"); return 1; } } else { stack16 = CTX_SEG_OFF_TO_LIN(context, context->SegSs, context->Esp); } context->Esp -= (args + (iret?1:0)) * sizeof(WORD); stack16 -= args; if (args) memcpy(stack16, stack, args*sizeof(WORD) ); /* push flags if iret */ if (iret) { stack16--; args++; *stack16 = LOWORD(context->EFlags); } /* push return address (return to interrupt wrapper) */ *(--stack16) = DOSVM_dpmi_segments->wrap_seg; *(--stack16) = 0; /* adjust stack */ context->Esp -= 2*sizeof(WORD); already = 1; } if (CurrRMCB) { /* RMCB call, invoke protected-mode handler directly */ DPMI_CallRMCBProc(context, CurrRMCB, dpmi_flag); /* check if we returned to where we thought we would */ if ((context->SegCs != DOSVM_dpmi_segments->wrap_seg) || (LOWORD(context->Eip) != 0)) { /* we need to continue at different address in real-mode space, so we need to set it all up for real mode again */ goto callrmproc_again; } } else { TRACE("entering real mode...\n"); DOSVM_Enter( context ); TRACE("returned from real-mode call\n"); } if (alloc) DOSMEM_FreeBlock( addr ); return 0; } /********************************************************************** * CallRMInt (WINEDOS.@) */ void WINAPI DOSVM_CallRMInt( CONTEXT86 *context ) { CONTEXT86 realmode_ctx; FARPROC16 rm_int = DOSVM_GetRMHandler( BL_reg(context) ); REALMODECALL *call = CTX_SEG_OFF_TO_LIN( context, context->SegEs, context->Edi ); INT_GetRealModeContext( call, &realmode_ctx ); /* we need to check if a real-mode program has hooked the interrupt */ if (HIWORD(rm_int)!=0xF000) { /* yup, which means we need to switch to real mode... */ realmode_ctx.SegCs = HIWORD(rm_int); realmode_ctx.Eip = LOWORD(rm_int); if (DPMI_CallRMProc( &realmode_ctx, NULL, 0, TRUE)) SET_CFLAG(context); } else { RESET_CFLAG(context); /* use the IP we have instead of BL_reg, in case some apps decide to move interrupts around for whatever reason... */ DOSVM_RealModeInterrupt( LOWORD(rm_int)/4, &realmode_ctx ); } INT_SetRealModeContext( call, &realmode_ctx ); } /********************************************************************** * CallRMProc (WINEDOS.@) */ void WINAPI DOSVM_CallRMProc( CONTEXT86 *context, int iret ) { REALMODECALL *p = CTX_SEG_OFF_TO_LIN( context, context->SegEs, context->Edi ); CONTEXT86 context16; TRACE("RealModeCall: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n", p->eax, p->ebx, p->ecx, p->edx); TRACE(" ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x, %d WORD arguments, %s\n", p->esi, p->edi, p->es, p->ds, p->cs, p->ip, CX_reg(context), iret?"IRET":"FAR" ); if (!(p->cs) && !(p->ip)) { /* remove this check if Int21/6501 case map function has been implemented */ SET_CFLAG(context); return; } INT_GetRealModeContext(p, &context16); DPMI_CallRMProc( &context16, ((LPWORD)MapSL(MAKESEGPTR(context->SegSs, LOWORD(context->Esp))))+3, CX_reg(context), iret ); INT_SetRealModeContext(p, &context16); } /* (see dosmem.c, function DOSMEM_InitDPMI) */ static void StartPM( CONTEXT86 *context ) { UINT16 cs, ss, ds, es; CONTEXT86 pm_ctx; DWORD psp_ofs = (DWORD)(DOSVM_psp<<4); PDB16 *psp = (PDB16 *)psp_ofs; HANDLE16 env_seg = psp->environment; unsigned char selflags = WINE_LDT_FLAGS_DATA; RESET_CFLAG(context); dpmi_flag = AX_reg(context); /* our mode switch wrapper have placed the desired CS into DX */ cs = SELECTOR_AllocBlock( (void *)(DX_reg(context)<<4), 0x10000, WINE_LDT_FLAGS_CODE ); /* due to a flaw in some CPUs (at least mine), it is best to mark stack segments as 32-bit if they can be used in 32-bit code. Otherwise, these CPUs may not set the high word of esp during a ring transition (from kernel code) to the 16-bit stack, and this causes trouble if executing 32-bit code using this stack. */ if (dpmi_flag & 1) selflags |= WINE_LDT_FLAGS_32BIT; ss = SELECTOR_AllocBlock( (void *)(context->SegSs<<4), 0x10000, selflags ); /* do the same for the data segments, just in case */ if (context->SegDs == context->SegSs) ds = ss; else ds = SELECTOR_AllocBlock( (void *)(context->SegDs<<4), 0x10000, selflags ); es = SELECTOR_AllocBlock( psp, 0x100, selflags ); /* convert environment pointer, as the spec says, but we're a bit lazy about the size here... */ psp->environment = SELECTOR_AllocBlock( (void *)(env_seg<<4), 0x10000, WINE_LDT_FLAGS_DATA ); pm_ctx = *context; pm_ctx.SegCs = DOSVM_dpmi_segments->dpmi_sel; /* our mode switch wrapper expects the new CS in DX, and the new SS in AX */ pm_ctx.Eax = ss; pm_ctx.Edx = cs; pm_ctx.SegDs = ds; pm_ctx.SegEs = es; pm_ctx.SegFs = 0; pm_ctx.SegGs = 0; TRACE("DOS program is now entering %d-bit protected mode\n", DOSVM_IsDos32() ? 32 : 16); wine_call_to_16_regs_short(&pm_ctx, 0); /* in the current state of affairs, we won't ever actually return here... */ /* we should have int21/ah=4c do it someday, though... */ FreeSelector16(psp->environment); psp->environment = env_seg; FreeSelector16(es); if (ds != ss) FreeSelector16(ds); FreeSelector16(ss); FreeSelector16(cs); } static RMCB *DPMI_AllocRMCB( void ) { RMCB *NewRMCB = HeapAlloc(GetProcessHeap(), 0, sizeof(RMCB)); UINT16 uParagraph; if (NewRMCB) { LPVOID RMCBmem = DOSMEM_GetBlock(4, &uParagraph); LPBYTE p = RMCBmem; *p++ = 0xcd; /* RMCB: */ *p++ = 0x31; /* int $0x31 */ /* it is the called procedure's task to change the return CS:EIP the DPMI 0.9 spec states that if it doesn't, it will be called again */ *p++ = 0xeb; *p++ = 0xfc; /* jmp RMCB */ NewRMCB->address = MAKELONG(0, uParagraph); NewRMCB->next = FirstRMCB; FirstRMCB = NewRMCB; } return NewRMCB; } FARPROC16 WINAPI DPMI_AllocInternalRMCB( RMCBPROC proc ) { RMCB *NewRMCB = DPMI_AllocRMCB(); if (NewRMCB) { NewRMCB->proc_ofs = (DWORD)proc; NewRMCB->proc_sel = 0; NewRMCB->regs_ofs = 0; NewRMCB->regs_sel = 0; return (FARPROC16)(NewRMCB->address); } return NULL; } static int DPMI_FreeRMCB( DWORD address ) { RMCB *CurrRMCB = FirstRMCB; RMCB *PrevRMCB = NULL; while (CurrRMCB && (CurrRMCB->address != address)) { PrevRMCB = CurrRMCB; CurrRMCB = CurrRMCB->next; } if (CurrRMCB) { if (PrevRMCB) PrevRMCB->next = CurrRMCB->next; else FirstRMCB = CurrRMCB->next; DOSMEM_FreeBlock(PTR_REAL_TO_LIN(SELECTOROF(CurrRMCB->address),OFFSETOF(CurrRMCB->address))); HeapFree(GetProcessHeap(), 0, CurrRMCB); return 0; } return 1; } void WINAPI DPMI_FreeInternalRMCB( FARPROC16 proc ) { DPMI_FreeRMCB( (DWORD)proc ); } /********************************************************************** * RawModeSwitch (WINEDOS.@) * * DPMI Raw Mode Switch handler */ void WINAPI DOSVM_RawModeSwitch( CONTEXT86 *context ) { CONTEXT86 rm_ctx; int ret; /* initialize real-mode context as per spec */ memset(&rm_ctx, 0, sizeof(rm_ctx)); rm_ctx.SegDs = AX_reg(context); rm_ctx.SegEs = CX_reg(context); rm_ctx.SegSs = DX_reg(context); rm_ctx.Esp = context->Ebx; rm_ctx.SegCs = SI_reg(context); rm_ctx.Eip = context->Edi; rm_ctx.Ebp = context->Ebp; rm_ctx.SegFs = 0; rm_ctx.SegGs = 0; rm_ctx.EFlags = context->EFlags; /* at least we need the IF flag */ /* enter real mode again */ TRACE("re-entering real mode at %04lx:%04lx\n",rm_ctx.SegCs,rm_ctx.Eip); ret = DOSVM_Enter( &rm_ctx ); /* when the real-mode stuff call its mode switch address, DOSVM_Enter will return and we will continue here */ if (ret<0) { ERR("Sync lost!\n"); /* if the sync was lost, there's no way to recover */ ExitProcess(1); } /* alter protected-mode context as per spec */ context->SegDs = LOWORD(rm_ctx.Eax); context->SegEs = LOWORD(rm_ctx.Ecx); context->SegSs = LOWORD(rm_ctx.Edx); context->Esp = rm_ctx.Ebx; context->SegCs = LOWORD(rm_ctx.Esi); context->Eip = rm_ctx.Edi; context->Ebp = rm_ctx.Ebp; context->SegFs = 0; context->SegGs = 0; /* Return to new address and hope that we didn't mess up */ TRACE("re-entering protected mode at %04lx:%08lx\n", context->SegCs, context->Eip); } /********************************************************************** * AllocRMCB (WINEDOS.@) */ void WINAPI DOSVM_AllocRMCB( CONTEXT86 *context ) { RMCB *NewRMCB = DPMI_AllocRMCB(); TRACE("Function to call: %04x:%04x\n", (WORD)context->SegDs, SI_reg(context) ); if (NewRMCB) { NewRMCB->proc_ofs = DOSVM_IsDos32() ? context->Esi : LOWORD(context->Esi); NewRMCB->proc_sel = context->SegDs; NewRMCB->regs_ofs = DOSVM_IsDos32() ? context->Edi : LOWORD(context->Edi); NewRMCB->regs_sel = context->SegEs; SET_LOWORD( context->Ecx, HIWORD(NewRMCB->address) ); SET_LOWORD( context->Edx, LOWORD(NewRMCB->address) ); } else { SET_LOWORD( context->Eax, 0x8015 ); /* callback unavailable */ SET_CFLAG(context); } } /********************************************************************** * FreeRMCB (WINEDOS.@) */ void WINAPI DOSVM_FreeRMCB( CONTEXT86 *context ) { FIXME("callback address: %04x:%04x\n", CX_reg(context), DX_reg(context)); if (DPMI_FreeRMCB(MAKELONG(DX_reg(context), CX_reg(context)))) { SET_LOWORD( context->Eax, 0x8024 ); /* invalid callback address */ SET_CFLAG(context); } } /********************************************************************** * DOSVM_RawModeSwitchWrapper * * DPMI Raw Mode Switch wrapper. * This routine does all the stack manipulation tricks needed * to return from protected mode interrupt using modified * code and stack pointers. */ static void DOSVM_RawModeSwitchWrapper( CONTEXT86 *context ) { /* * FIXME: This routine will not work if it is called * from 32 bit DPMI program and the program returns * to protected mode while ESP or EIP is over 0xffff. * FIXME: This routine will not work if it is not called * using 16-bit-to-Wine callback glue function. */ STACK16FRAME frame = *CURRENT_STACK16; DOSVM_RawModeSwitch( context ); /* * After this function returns to relay code, protected mode * 16 bit stack will contain STACK16FRAME and single WORD * (EFlags, see next comment). */ NtCurrentTeb()->cur_stack = MAKESEGPTR( context->SegSs, context->Esp - sizeof(STACK16FRAME) - sizeof(WORD) ); /* * After relay code returns to glue function, protected * mode 16 bit stack will contain interrupt return record: * IP, CS and EFlags. Since EFlags is ignored, it won't * need to be initialized. */ context->Esp -= 3 * sizeof(WORD); /* * Restore stack frame so that relay code won't be confused. * It should be noted that relay code overwrites IP and CS * in STACK16FRAME with values taken from current CONTEXT86. * These values are what is returned to glue function * (see previous comment). */ *CURRENT_STACK16 = frame; } /********************************************************************** * DOSVM_CheckWrappers * * Check if this was really a wrapper call instead of an interrupt. * FIXME: Protected mode stuff does not work in 32-bit DPMI. * FIXME: If int31 is called asynchronously (unlikely) * wrapper checks are wrong (CS/IP must not be used). */ static BOOL DOSVM_CheckWrappers( CONTEXT86 *context ) { /* Handle protected mode interrupts. */ if (!ISV86(context)) { if (context->SegCs == DOSVM_dpmi_segments->dpmi_sel) { DOSVM_RawModeSwitchWrapper( context ); return TRUE; } return FALSE; } /* check if it's our wrapper */ TRACE("called from real mode\n"); if (context->SegCs==DOSVM_dpmi_segments->dpmi_seg) { /* This is the protected mode switch */ StartPM(context); return TRUE; } else if (context->SegCs==DOSVM_dpmi_segments->xms_seg) { /* This is the XMS driver entry point */ XMS_Handler(context); return TRUE; } else { /* Check for RMCB */ RMCB *CurrRMCB = FirstRMCB; while (CurrRMCB && (HIWORD(CurrRMCB->address) != context->SegCs)) CurrRMCB = CurrRMCB->next; if (CurrRMCB) { /* RMCB call, propagate to protected-mode handler */ DPMI_CallRMCBProc(context, CurrRMCB, dpmi_flag); return TRUE; } } return FALSE; } /********************************************************************** * DOSVM_Int31Handler (WINEDOS16.149) * * Handler for int 31h (DPMI). */ void WINAPI DOSVM_Int31Handler( CONTEXT86 *context ) { if (DOSVM_CheckWrappers(context)) return; RESET_CFLAG(context); switch(AX_reg(context)) { case 0x0000: /* Allocate LDT descriptors */ TRACE( "allocate LDT descriptors (%d)\n", CX_reg(context) ); { WORD sel = AllocSelectorArray16( CX_reg(context) ); if(!sel) { TRACE( "failed\n" ); SET_AX( context, 0x8011 ); /* descriptor unavailable */ SET_CFLAG( context ); } else { TRACE( "success, array starts at 0x%04x\n", sel ); SET_AX( context, sel ); } } break; case 0x0001: /* Free LDT descriptor */ TRACE( "free LDT descriptor (0x%04x)\n", BX_reg(context) ); if (FreeSelector16( BX_reg(context) )) { SET_AX( context, 0x8022 ); /* invalid selector */ SET_CFLAG( context ); } else { /* If a segment register contains the selector being freed, */ /* set it to zero. */ if (!((context->SegDs^BX_reg(context)) & ~3)) context->SegDs = 0; if (!((context->SegEs^BX_reg(context)) & ~3)) context->SegEs = 0; if (!((context->SegFs^BX_reg(context)) & ~3)) context->SegFs = 0; if (!((context->SegGs^BX_reg(context)) & ~3)) context->SegGs = 0; } break; case 0x0002: /* Real mode segment to descriptor */ TRACE( "real mode segment to descriptor (0x%04x)\n", BX_reg(context) ); { WORD entryPoint = 0; /* KERNEL entry point for descriptor */ switch(BX_reg(context)) { case 0x0000: entryPoint = 183; break; /* __0000H */ case 0x0040: entryPoint = 193; break; /* __0040H */ case 0xa000: entryPoint = 174; break; /* __A000H */ case 0xb000: entryPoint = 181; break; /* __B000H */ case 0xb800: entryPoint = 182; break; /* __B800H */ case 0xc000: entryPoint = 195; break; /* __C000H */ case 0xd000: entryPoint = 179; break; /* __D000H */ case 0xe000: entryPoint = 190; break; /* __E000H */ case 0xf000: entryPoint = 194; break; /* __F000H */ default: SET_AX( context, DOSMEM_AllocSelector(BX_reg(context)) ); break; } if (entryPoint) { FARPROC16 proc = GetProcAddress16( GetModuleHandle16( "KERNEL" ), (LPCSTR)(ULONG_PTR)entryPoint ); SET_AX( context, LOWORD(proc) ); } } break; case 0x0003: /* Get next selector increment */ TRACE("get selector increment (__AHINCR)\n"); context->Eax = __AHINCR; break; case 0x0004: /* Lock selector (not supported) */ FIXME("lock selector not supported\n"); context->Eax = 0; /* FIXME: is this a correct return value? */ break; case 0x0005: /* Unlock selector (not supported) */ FIXME("unlock selector not supported\n"); context->Eax = 0; /* FIXME: is this a correct return value? */ break; case 0x0006: /* Get selector base address */ TRACE( "get selector base address (0x%04x)\n", BX_reg(context) ); { WORD sel = BX_reg(context); if (IS_SELECTOR_SYSTEM(sel) || IS_SELECTOR_FREE(sel)) { context->Eax = 0x8022; /* invalid selector */ SET_CFLAG(context); } else { DWORD base = GetSelectorBase( sel ); SET_CX( context, HIWORD(base) ); SET_DX( context, LOWORD(base) ); } } break; case 0x0007: /* Set selector base address */ { DWORD base = MAKELONG( DX_reg(context), CX_reg(context) ); WORD sel = BX_reg(context); TRACE( "set selector base address (0x%04x,0x%08lx)\n", sel, base ); /* check if Win16 app wants to access lower 64K of DOS memory */ if (base < 0x10000 && DOSVM_IsWin16()) DOSMEM_Init(TRUE); SetSelectorBase( sel, base ); } break; case 0x0008: /* Set selector limit */ { DWORD limit = MAKELONG( DX_reg(context), CX_reg(context) ); TRACE( "set selector limit (0x%04x,0x%08lx)\n", BX_reg(context), limit ); SetSelectorLimit16( BX_reg(context), limit ); } break; case 0x0009: /* Set selector access rights */ TRACE( "set selector access rights(0x%04x,0x%04x)\n", BX_reg(context), CX_reg(context) ); SelectorAccessRights16( BX_reg(context), 1, CX_reg(context) ); break; case 0x000a: /* Allocate selector alias */ TRACE( "allocate selector alias (0x%04x)\n", BX_reg(context) ); if (!SET_AX( context, AllocCStoDSAlias16( BX_reg(context) ))) { SET_AX( context, 0x8011 ); /* descriptor unavailable */ SET_CFLAG(context); } break; case 0x000b: /* Get descriptor */ TRACE( "get descriptor (0x%04x)\n", BX_reg(context) ); { LDT_ENTRY *entry = (LDT_ENTRY*)CTX_SEG_OFF_TO_LIN( context, context->SegEs, context->Edi ); wine_ldt_get_entry( BX_reg(context), entry ); } break; case 0x000c: /* Set descriptor */ TRACE( "set descriptor (0x%04x)\n", BX_reg(context) ); { LDT_ENTRY *entry = (LDT_ENTRY*)CTX_SEG_OFF_TO_LIN( context, context->SegEs, context->Edi ); wine_ldt_set_entry( BX_reg(context), entry ); } break; case 0x000d: /* Allocate specific LDT descriptor */ FIXME( "allocate descriptor (0x%04x), stub!\n", BX_reg(context) ); SET_AX( context, 0x8011 ); /* descriptor unavailable */ SET_CFLAG( context ); break; case 0x000e: /* Get Multiple Descriptors (1.0) */ FIXME( "get multiple descriptors - unimplemented\n" ); break; case 0x000f: /* Set Multiple Descriptors (1.0) */ FIXME( "set multiple descriptors - unimplemented\n" ); break; case 0x0100: /* Allocate DOS memory block */ TRACE( "allocate DOS memory block (0x%x paragraphs)\n", BX_reg(context) ); { DWORD dw = GlobalDOSAlloc16( (DWORD)BX_reg(context) << 4 ); if (dw) { SET_AX( context, HIWORD(dw) ); SET_DX( context, LOWORD(dw) ); } else { SET_AX( context, 0x0008 ); /* insufficient memory */ SET_BX( context, DOSMEM_Available() >> 4 ); SET_CFLAG(context); } break; } case 0x0101: /* Free DOS memory block */ TRACE( "free DOS memory block (0x%04x)\n", DX_reg(context) ); { WORD error = GlobalDOSFree16( DX_reg(context) ); if (error) { SET_AX( context, 0x0009 ); /* memory block address invalid */ SET_CFLAG( context ); } } break; case 0x0102: /* Resize DOS Memory Block */ FIXME( "resize DOS memory block (0x%04x, 0x%x paragraphs) - unimplemented\n", DX_reg(context), BX_reg(context) ); break; case 0x0200: /* get real mode interrupt vector */ TRACE( "get realmode interupt vector (0x%02x)\n", BL_reg(context) ); { FARPROC16 proc = DOSVM_GetRMHandler( BL_reg(context) ); SET_CX( context, SELECTOROF(proc) ); SET_DX( context, OFFSETOF(proc) ); } break; case 0x0201: /* set real mode interrupt vector */ TRACE( "set realmode interrupt vector (0x%02x, 0x%04x:0x%04x)\n", BL_reg(context), CX_reg(context), DX_reg(context) ); DOSVM_SetRMHandler( BL_reg(context), (FARPROC16)MAKESEGPTR(CX_reg(context), DX_reg(context)) ); break; case 0x0202: /* Get Processor Exception Handler Vector */ FIXME( "Get Processor Exception Handler Vector (0x%02x)\n", BL_reg(context) ); if (DOSVM_IsDos32()) { SET_CX( context, 0 ); context->Edx = 0; } else { SET_CX( context, 0 ); SET_DX( context, 0 ); } break; case 0x0203: /* Set Processor Exception Handler Vector */ FIXME( "Set Processor Exception Handler Vector (0x%02x)\n", BL_reg(context) ); break; case 0x0204: /* Get protected mode interrupt vector */ TRACE("get protected mode interrupt handler (0x%02x)\n", BL_reg(context)); if (DOSVM_IsDos32()) { FARPROC48 handler = DOSVM_GetPMHandler48( BL_reg(context) ); SET_CX( context, handler.selector ); context->Edx = handler.offset; } else { FARPROC16 handler = DOSVM_GetPMHandler16( BL_reg(context) ); SET_CX( context, SELECTOROF(handler) ); SET_DX( context, OFFSETOF(handler) ); } break; case 0x0205: /* Set protected mode interrupt vector */ TRACE("set protected mode interrupt handler (0x%02x,0x%04x:0x%08lx)\n", BL_reg(context), CX_reg(context), context->Edx); if (DOSVM_IsDos32()) { FARPROC48 handler; handler.selector = CX_reg(context); handler.offset = context->Edx; DOSVM_SetPMHandler48( BL_reg(context), handler ); } else { FARPROC16 handler; handler = (FARPROC16)MAKESEGPTR( CX_reg(context), DX_reg(context)); DOSVM_SetPMHandler16( BL_reg(context), handler ); } break; case 0x0300: /* Simulate real mode interrupt */ DOSVM_CallRMInt( context ); break; case 0x0301: /* Call real mode procedure with far return */ DOSVM_CallRMProc( context, FALSE ); break; case 0x0302: /* Call real mode procedure with interrupt return */ DOSVM_CallRMProc( context, TRUE ); break; case 0x0303: /* Allocate Real Mode Callback Address */ DOSVM_AllocRMCB( context ); break; case 0x0304: /* Free Real Mode Callback Address */ DOSVM_FreeRMCB( context ); break; case 0x0305: /* Get State Save/Restore Addresses */ TRACE("get state save/restore addresses\n"); /* we probably won't need this kind of state saving */ SET_AX( context, 0 ); /* real mode: just point to the lret */ SET_BX( context, DOSVM_dpmi_segments->wrap_seg ); SET_CX( context, 2 ); /* protected mode: don't have any handler yet... */ /* FIXME: Use DI in 16-bit DPMI and EDI in 32-bit DPMI */ FIXME("no protected-mode dummy state save/restore handler yet\n"); SET_SI( context, 0 ); context->Edi = 0; break; case 0x0306: /* Get Raw Mode Switch Addresses */ TRACE("get raw mode switch addresses\n"); /* real mode, point to standard DPMI return wrapper */ SET_BX( context, DOSVM_dpmi_segments->wrap_seg ); SET_CX( context, 0 ); /* protected mode, point to DPMI call wrapper */ /* FIXME: Use DI in 16-bit DPMI and EDI in 32-bit DPMI */ /* FIXME: Doesn't work in DPMI32... */ SET_SI( context, DOSVM_dpmi_segments->dpmi_sel ); context->Edi = 8; /* offset of the INT 0x31 call */ break; case 0x0400: /* Get DPMI version */ TRACE("get DPMI version\n"); { SYSTEM_INFO si; GetSystemInfo(&si); SET_AX( context, 0x005a ); /* DPMI version 0.90 */ SET_BX( context, 0x0005 ); /* Flags: 32-bit, virtual memory */ SET_CL( context, si.wProcessorLevel ); SET_DX( context, 0x0102 ); /* Master/slave interrupt controller base */ } break; case 0x0401: /* Get DPMI Capabilities (1.0) */ FIXME( "get dpmi capabilities - unimplemented\n"); break; case 0x0500: /* Get free memory information */ TRACE("get free memory information\n"); { MEMMANINFO mmi; void *ptr = CTX_SEG_OFF_TO_LIN( context, context->SegEs, context->Edi ); mmi.dwSize = sizeof( mmi ); MemManInfo16( &mmi ); /* the layout is just the same as MEMMANINFO, but without * the dwSize entry. */ memcpy( ptr, ((char*)&mmi)+4, sizeof(mmi)-4 ); break; } case 0x0501: /* Allocate memory block */ { DWORD size = MAKELONG( CX_reg(context), BX_reg(context) ); BYTE *ptr; TRACE( "allocate memory block (%ld bytes)\n", size ); ptr = (BYTE *)DPMI_xalloc( size ); if (!ptr) { SET_AX( context, 0x8012 ); /* linear memory not available */ SET_CFLAG(context); } else { SET_BX( context, HIWORD(ptr) ); SET_CX( context, LOWORD(ptr) ); SET_SI( context, HIWORD(ptr) ); SET_DI( context, LOWORD(ptr) ); } break; } case 0x0502: /* Free memory block */ { DWORD handle = MAKELONG( DI_reg(context), SI_reg(context) ); TRACE( "free memory block (0x%08lx)\n", handle ); DPMI_xfree( (void *)handle ); } break; case 0x0503: /* Resize memory block */ { DWORD size = MAKELONG( CX_reg(context), BX_reg(context) ); DWORD handle = MAKELONG( DI_reg(context), SI_reg(context) ); BYTE *ptr; TRACE( "resize memory block (0x%08lx, %ld bytes)\n", handle, size ); ptr = (BYTE *)DPMI_xrealloc( (void *)handle, size ); if (!ptr) { SET_AX( context, 0x8012 ); /* linear memory not available */ SET_CFLAG(context); } else { SET_BX( context, HIWORD(ptr) ); SET_CX( context, LOWORD(ptr) ); SET_SI( context, HIWORD(ptr) ); SET_DI( context, LOWORD(ptr) ); } } break; case 0x0507: /* Set page attributes (1.0) */ FIXME("set page attributes unimplemented\n"); break; /* Just ignore it */ case 0x0600: /* Lock linear region */ FIXME("lock linear region unimplemented\n"); break; /* Just ignore it */ case 0x0601: /* Unlock linear region */ FIXME("unlock linear region unimplemented\n"); break; /* Just ignore it */ case 0x0602: /* Unlock real-mode region */ FIXME("unlock realmode region unimplemented\n"); break; /* Just ignore it */ case 0x0603: /* Lock real-mode region */ FIXME("lock realmode region unimplemented\n"); break; /* Just ignore it */ case 0x0604: /* Get page size */ TRACE("get pagesize\n"); SET_BX( context, HIWORD(getpagesize()) ); SET_CX( context, LOWORD(getpagesize()) ); break; case 0x0702: /* Mark page as demand-paging candidate */ FIXME("mark page as demand-paging candidate\n"); break; /* Just ignore it */ case 0x0703: /* Discard page contents */ FIXME("discard page contents\n"); break; /* Just ignore it */ case 0x0800: /* Physical address mapping */ FIXME( "physical address mapping (0x%08lx) - unimplemented\n", MAKELONG(CX_reg(context),BX_reg(context)) ); break; default: INT_BARF( context, 0x31 ); SET_AX( context, 0x8001 ); /* unsupported function */ SET_CFLAG(context); break; } }