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https://github.com/reactos/wine.git
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1011 lines
33 KiB
C
1011 lines
33 KiB
C
/*
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* DPMI 0.9 emulation
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*
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* Copyright 1995 Alexandre Julliard
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*/
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#include <unistd.h>
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#include <string.h>
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#include "wintypes.h"
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#include "wine/winbase16.h"
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#include "ldt.h"
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#include "global.h"
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#include "module.h"
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#include "miscemu.h"
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#include "msdos.h"
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#include "task.h"
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#include "thread.h" /* for !MZ_SUPPORTED */
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#include "stackframe.h" /* for !MZ_SUPPORTED */
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#include "toolhelp.h"
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#include "selectors.h"
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#include "process.h"
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#include "callback.h"
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#include "debug.h"
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#define DOS_GET_DRIVE(reg) ((reg) ? (reg) - 1 : DRIVE_GetCurrentDrive())
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void CreateBPB(int drive, BYTE *data, BOOL16 limited); /* defined in int21.c */
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static void* lastvalloced = NULL;
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/* Structure for real-mode callbacks */
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typedef struct
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{
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DWORD edi;
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DWORD esi;
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DWORD ebp;
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DWORD reserved;
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DWORD ebx;
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DWORD edx;
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DWORD ecx;
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DWORD eax;
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WORD fl;
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WORD es;
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WORD ds;
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WORD fs;
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WORD gs;
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WORD ip;
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WORD cs;
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WORD sp;
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WORD ss;
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} REALMODECALL;
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typedef struct tagRMCB {
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DWORD address;
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DWORD proc_ofs,proc_sel;
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DWORD regs_ofs,regs_sel;
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struct tagRMCB *next;
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} RMCB;
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static RMCB *FirstRMCB = NULL;
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UINT16 DPMI_wrap_seg;
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/**********************************************************************
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* DPMI_xalloc
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* special virtualalloc, allocates lineary monoton growing memory.
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* (the usual VirtualAlloc does not satisfy that restriction)
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*/
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static LPVOID
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DPMI_xalloc(int len) {
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LPVOID ret;
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LPVOID oldlastv = lastvalloced;
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if (lastvalloced) {
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int xflag = 0;
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ret = NULL;
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while (!ret) {
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ret=VirtualAlloc(lastvalloced,len,MEM_COMMIT|MEM_RESERVE,PAGE_EXECUTE_READWRITE);
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if (!ret)
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lastvalloced+=0x10000;
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/* we failed to allocate one in the first round.
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* try non-linear
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*/
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if (!xflag && (lastvalloced<oldlastv)) { /* wrapped */
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FIXME(int31,"failed to allocate lineary growing memory (%d bytes), using non-linear growing...\n",len);
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xflag++;
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}
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/* if we even fail to allocate something in the next
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* round, return NULL
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*/
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if ((xflag==1) && (lastvalloced >= oldlastv))
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xflag++;
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if ((xflag==2) && (lastvalloced < oldlastv)) {
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FIXME(int31,"failed to allocate any memory of %d bytes!\n",len);
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return NULL;
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}
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}
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} else
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ret=VirtualAlloc(NULL,len,MEM_COMMIT|MEM_RESERVE,PAGE_EXECUTE_READWRITE);
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lastvalloced = (LPVOID)(((DWORD)ret+len+0xffff)&~0xffff);
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return ret;
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}
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static void
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DPMI_xfree(LPVOID ptr) {
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VirtualFree(ptr,0,MEM_RELEASE);
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}
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/* FIXME: perhaps we could grow this mapped area... */
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static LPVOID
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DPMI_xrealloc(LPVOID ptr,int newsize) {
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MEMORY_BASIC_INFORMATION mbi;
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LPVOID newptr;
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newptr = DPMI_xalloc(newsize);
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if (ptr) {
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if (!VirtualQuery(ptr,&mbi,sizeof(mbi))) {
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FIXME(int31,"realloc of DPMI_xallocd region %p?\n",ptr);
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return NULL;
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}
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if (mbi.State == MEM_FREE) {
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FIXME(int31,"realloc of DPMI_xallocd region %p?\n",ptr);
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return NULL;
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}
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/* We do not shrink allocated memory. most reallocs
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* only do grows anyway
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*/
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if (newsize<=mbi.RegionSize)
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return ptr;
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memcpy(newptr,ptr,mbi.RegionSize);
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DPMI_xfree(ptr);
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}
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return newptr;
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}
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/**********************************************************************
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* INT_GetRealModeContext
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*/
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static void INT_GetRealModeContext( REALMODECALL *call, CONTEXT *context )
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{
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EAX_reg(context) = call->eax;
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EBX_reg(context) = call->ebx;
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ECX_reg(context) = call->ecx;
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EDX_reg(context) = call->edx;
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ESI_reg(context) = call->esi;
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EDI_reg(context) = call->edi;
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EBP_reg(context) = call->ebp;
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EFL_reg(context) = call->fl | V86_FLAG;
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EIP_reg(context) = call->ip;
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ESP_reg(context) = call->sp;
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CS_reg(context) = call->cs;
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DS_reg(context) = call->ds;
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ES_reg(context) = call->es;
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FS_reg(context) = call->fs;
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GS_reg(context) = call->gs;
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SS_reg(context) = call->ss;
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(char*)V86BASE(context) = DOSMEM_MemoryBase(0);
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}
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/**********************************************************************
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* INT_SetRealModeContext
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*/
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static void INT_SetRealModeContext( REALMODECALL *call, CONTEXT *context )
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{
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call->eax = EAX_reg(context);
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call->ebx = EBX_reg(context);
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call->ecx = ECX_reg(context);
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call->edx = EDX_reg(context);
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call->esi = ESI_reg(context);
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call->edi = EDI_reg(context);
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call->ebp = EBP_reg(context);
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call->fl = FL_reg(context);
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call->ip = IP_reg(context);
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call->sp = SP_reg(context);
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call->cs = CS_reg(context);
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call->ds = DS_reg(context);
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call->es = ES_reg(context);
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call->fs = FS_reg(context);
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call->gs = GS_reg(context);
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call->ss = SS_reg(context);
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}
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/**********************************************************************
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* DPMI_CallRMCBProc
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*
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* This routine does the hard work of calling a callback procedure.
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*/
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static void DPMI_CallRMCBProc( CONTEXT *context, RMCB *rmcb, WORD flag )
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{
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if (IS_SELECTOR_SYSTEM( rmcb->proc_sel )) {
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/* Wine-internal RMCB, call directly */
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((RMCBPROC)rmcb->proc_ofs)(context);
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} else {
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#ifdef __i386__
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UINT16 ss,es;
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DWORD edi;
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INT_SetRealModeContext((REALMODECALL *)PTR_SEG_OFF_TO_LIN( rmcb->regs_sel, rmcb->regs_ofs ), context);
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ss = SELECTOR_AllocBlock( DOSMEM_MemoryBase(0) + (DWORD)(SS_reg(context)<<4), 0x10000, SEGMENT_DATA, FALSE, FALSE );
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FIXME(int31,"untested!\n");
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/* The called proc ends with an IRET, and takes these parameters:
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* DS:ESI = pointer to real-mode SS:SP
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* ES:EDI = pointer to real-mode call structure
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* It returns:
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* ES:EDI = pointer to real-mode call structure (may be a copy)
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* It is the proc's responsibility to change the return CS:IP in the
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* real-mode call structure. */
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if (flag & 1) {
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int _clobber;
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/* 32-bit DPMI client */
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__asm__ __volatile__("
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pushl %%es
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pushl %%ds
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pushfl
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movl %5,%%es
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movl %4,%%ds
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lcall %3
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popl %%ds
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movl %%es,%0
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popl %%es
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"
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: "=g" (es), "=D" (edi), "=S" (_clobber)
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: "m" (rmcb->proc_ofs),
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"g" (ss), "g" (rmcb->regs_sel),
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"S" (ESP_reg(context)), "1" (rmcb->regs_ofs)
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: "ecx", "edx", "ebp" );
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} else {
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/* 16-bit DPMI client */
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CONTEXT ctx = *context;
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CS_reg(&ctx) = rmcb->proc_sel;
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EIP_reg(&ctx) = rmcb->proc_ofs;
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DS_reg(&ctx) = ss;
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ESI_reg(&ctx) = ESP_reg(context);
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ES_reg(&ctx) = rmcb->regs_sel;
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EDI_reg(&ctx) = rmcb->regs_ofs;
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Callbacks->CallRegisterShortProc(&ctx, 2);
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es = ES_reg(&ctx);
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edi = EDI_reg(&ctx);
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}
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UnMapLS(PTR_SEG_OFF_TO_SEGPTR(ss,0));
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INT_GetRealModeContext((REALMODECALL*)PTR_SEG_OFF_TO_LIN( es, edi ), context);
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#else
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ERR(int31,"RMCBs only implemented for i386\n");
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#endif
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}
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}
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/**********************************************************************
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* DPMI_CallRMProc
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*
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* This routine does the hard work of calling a real mode procedure.
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*/
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int DPMI_CallRMProc( CONTEXT *context, LPWORD stack, int args, int iret )
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{
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LPWORD stack16;
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#ifndef MZ_SUPPORTED
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THDB *thdb = THREAD_Current();
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WORD sel;
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SEGPTR seg_addr;
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#endif /* !MZ_SUPPORTED */
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LPVOID addr = NULL; /* avoid gcc warning */
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TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
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NE_MODULE *pModule = pTask ? NE_GetPtr( pTask->hModule ) : NULL;
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RMCB *CurrRMCB;
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int alloc = 0, already = 0;
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GlobalUnlock16( GetCurrentTask() );
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TRACE(int31, "EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n",
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EAX_reg(context), EBX_reg(context), ECX_reg(context), EDX_reg(context) );
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TRACE(int31, "ESI=%08lx EDI=%08lx ES=%04lx DS=%04lx CS:IP=%04lx:%04x, %d WORD arguments, %s\n",
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ESI_reg(context), EDI_reg(context), ES_reg(context), DS_reg(context),
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CS_reg(context), IP_reg(context), args, iret?"IRET":"FAR" );
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callrmproc_again:
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/* shortcut for chaining to internal interrupt handlers */
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if ((CS_reg(context) == 0xF000) && iret) {
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return INT_RealModeInterrupt( IP_reg(context)/4, context);
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}
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/* shortcut for RMCBs */
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CurrRMCB = FirstRMCB;
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while (CurrRMCB && (HIWORD(CurrRMCB->address) != CS_reg(context)))
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CurrRMCB = CurrRMCB->next;
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#ifdef MZ_SUPPORTED
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if (!(CurrRMCB || pModule->lpDosTask)) {
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FIXME(int31,"DPMI real-mode call using DOS VM task system, not fully tested!\n");
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TRACE(int31,"creating VM86 task\n");
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if (!MZ_InitTask( MZ_AllocDPMITask( pModule->self ) )) {
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ERR(int31,"could not setup VM86 task\n");
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return 1;
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}
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}
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if (!already) {
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if (!SS_reg(context)) {
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alloc = 1; /* allocate default stack */
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stack16 = addr = DOSMEM_GetBlock( pModule->self, 64, (UINT16 *)&(SS_reg(context)) );
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SP_reg(context) = 64-2;
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stack16 += 32-1;
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if (!addr) {
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ERR(int31,"could not allocate default stack\n");
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return 1;
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}
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} else {
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stack16 = CTX_SEG_OFF_TO_LIN(context, SS_reg(context), ESP_reg(context));
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}
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SP_reg(context) -= (args + (iret?1:0)) * sizeof(WORD);
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#else
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if (!already) {
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stack16 = THREAD_STACK16(thdb);
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#endif
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stack16 -= args;
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if (args) memcpy(stack16, stack, args*sizeof(WORD) );
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/* push flags if iret */
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if (iret) {
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stack16--; args++;
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*stack16 = FL_reg(context);
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}
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#ifdef MZ_SUPPORTED
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/* push return address (return to interrupt wrapper) */
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*(--stack16) = DPMI_wrap_seg;
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*(--stack16) = 0;
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/* adjust stack */
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SP_reg(context) -= 2*sizeof(WORD);
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#endif
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already = 1;
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}
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if (CurrRMCB) {
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/* RMCB call, invoke protected-mode handler directly */
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DPMI_CallRMCBProc(context, CurrRMCB, pModule->lpDosTask?pModule->lpDosTask->dpmi_flag:0);
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/* check if we returned to where we thought we would */
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if ((CS_reg(context) != DPMI_wrap_seg) ||
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(IP_reg(context) != 0)) {
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/* we need to continue at different address in real-mode space,
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so we need to set it all up for real mode again */
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goto callrmproc_again;
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}
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} else {
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#ifdef MZ_SUPPORTED
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#if 0 /* this was probably unnecessary */
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/* push call address */
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*(--stack16) = CS_reg(context);
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*(--stack16) = IP_reg(context);
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/* adjust stack */
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SP_reg(context) -= 2*sizeof(WORD);
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/* set initial CS:IP to the wrapper's "lret" */
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CS_reg(context) = DPMI_wrap_seg;
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IP_reg(context) = 2;
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#endif
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TRACE(int31,"entering real mode...\n");
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DOSVM_Enter( context );
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TRACE(int31,"returned from real-mode call\n");
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#else
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addr = CTX_SEG_OFF_TO_LIN(context, CS_reg(context), EIP_reg(context));
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sel = SELECTOR_AllocBlock( addr, 0x10000, SEGMENT_CODE, FALSE, FALSE );
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seg_addr = PTR_SEG_OFF_TO_SEGPTR( sel, 0 );
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CS_reg(context) = HIWORD(seg_addr);
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IP_reg(context) = LOWORD(seg_addr);
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EBP_reg(context) = OFFSETOF( thdb->cur_stack )
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+ (WORD)&((STACK16FRAME*)0)->bp;
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Callbacks->CallRegisterShortProc(context, args*sizeof(WORD));
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UnMapLS(seg_addr);
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#endif
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}
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if (alloc) DOSMEM_FreeBlock( pModule->self, addr );
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return 0;
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}
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/**********************************************************************
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* CallRMInt
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*/
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static void CallRMInt( CONTEXT *context )
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{
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CONTEXT realmode_ctx;
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FARPROC16 rm_int = INT_GetRMHandler( BL_reg(context) );
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REALMODECALL *call = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context),
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DI_reg(context) );
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INT_GetRealModeContext( call, &realmode_ctx );
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/* we need to check if a real-mode program has hooked the interrupt */
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if (HIWORD(rm_int)!=0xF000) {
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/* yup, which means we need to switch to real mode... */
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CS_reg(&realmode_ctx) = HIWORD(rm_int);
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EIP_reg(&realmode_ctx) = LOWORD(rm_int);
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if (DPMI_CallRMProc( &realmode_ctx, NULL, 0, TRUE))
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SET_CFLAG(context);
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} else {
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RESET_CFLAG(context);
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/* use the IP we have instead of BL_reg, in case some apps
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decide to move interrupts around for whatever reason... */
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if (INT_RealModeInterrupt( LOWORD(rm_int)/4, &realmode_ctx ))
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SET_CFLAG(context);
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if (EFL_reg(context)&1) {
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FIXME(int31,"%02x: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n",
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BL_reg(context), EAX_reg(&realmode_ctx), EBX_reg(&realmode_ctx),
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ECX_reg(&realmode_ctx), EDX_reg(&realmode_ctx));
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FIXME(int31," ESI=%08lx EDI=%08lx DS=%04lx ES=%04lx\n",
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ESI_reg(&realmode_ctx), EDI_reg(&realmode_ctx),
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DS_reg(&realmode_ctx), ES_reg(&realmode_ctx) );
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}
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}
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INT_SetRealModeContext( call, &realmode_ctx );
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}
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static void CallRMProc( CONTEXT *context, int iret )
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{
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REALMODECALL *p = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) );
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CONTEXT context16;
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TRACE(int31, "RealModeCall: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n",
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p->eax, p->ebx, p->ecx, p->edx);
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TRACE(int31, " ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x, %d WORD arguments, %s\n",
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p->esi, p->edi, p->es, p->ds, p->cs, p->ip, CX_reg(context), iret?"IRET":"FAR" );
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if (!(p->cs) && !(p->ip)) { /* remove this check
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if Int21/6501 case map function
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has been implemented */
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SET_CFLAG(context);
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return;
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}
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INT_GetRealModeContext(p, &context16);
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DPMI_CallRMProc( &context16, ((LPWORD)PTR_SEG_OFF_TO_LIN(SS_reg(context), SP_reg(context)))+3,
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CX_reg(context), iret );
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INT_SetRealModeContext(p, &context16);
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}
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static void WINAPI WINE_UNUSED RMCallbackProc( RMCB *rmcb )
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{
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/* This routine should call DPMI_CallRMCBProc, but we don't have the
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register structure available - this is easily fixed by going through
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a Win16 register relay instead of calling RMCallbackProc "directly",
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but I won't bother at this time. */
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FIXME(int31,"not properly supported on your architecture!\n");
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}
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static RMCB *DPMI_AllocRMCB( void )
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{
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RMCB *NewRMCB = HeapAlloc(GetProcessHeap(), 0, sizeof(RMCB));
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UINT16 uParagraph;
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if (NewRMCB)
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{
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#ifdef MZ_SUPPORTED
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LPVOID RMCBmem = DOSMEM_GetBlock(0, 4, &uParagraph);
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LPBYTE p = RMCBmem;
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*p++ = 0xcd; /* RMCB: */
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*p++ = 0x31; /* int $0x31 */
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/* it is the called procedure's task to change the return CS:EIP
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the DPMI 0.9 spec states that if it doesn't, it will be called again */
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*p++ = 0xeb;
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*p++ = 0xfc; /* jmp RMCB */
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#else
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LPVOID RMCBmem = DOSMEM_GetBlock(0, 15, &uParagraph);
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LPBYTE p = RMCBmem;
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|
|
*p++ = 0x68; /* pushl */
|
|
*(LPVOID *)p = NewRMCB;
|
|
p+=4;
|
|
*p++ = 0x9a; /* lcall */
|
|
*(FARPROC16 *)p = (FARPROC16)RMCallbackProc; /* FIXME: register relay */
|
|
p+=4;
|
|
GET_CS(*(WORD *)p);
|
|
p+=2;
|
|
*p++=0xc3; /* lret (FIXME?) */
|
|
#endif
|
|
NewRMCB->address = MAKELONG(0, uParagraph);
|
|
NewRMCB->next = FirstRMCB;
|
|
FirstRMCB = NewRMCB;
|
|
}
|
|
return NewRMCB;
|
|
}
|
|
|
|
|
|
static void AllocRMCB( CONTEXT *context )
|
|
{
|
|
RMCB *NewRMCB = DPMI_AllocRMCB();
|
|
|
|
TRACE(int31, "Function to call: %04x:%04x\n", (WORD)DS_reg(context), SI_reg(context) );
|
|
|
|
if (NewRMCB)
|
|
{
|
|
/* FIXME: if 32-bit DPMI client, use ESI and EDI */
|
|
NewRMCB->proc_ofs = SI_reg(context);
|
|
NewRMCB->proc_sel = DS_reg(context);
|
|
NewRMCB->regs_ofs = DI_reg(context);
|
|
NewRMCB->regs_sel = ES_reg(context);
|
|
CX_reg(context) = HIWORD(NewRMCB->address);
|
|
DX_reg(context) = LOWORD(NewRMCB->address);
|
|
}
|
|
else
|
|
{
|
|
AX_reg(context) = 0x8015; /* callback unavailable */
|
|
SET_CFLAG(context);
|
|
}
|
|
}
|
|
|
|
|
|
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(0, DOSMEM_MapRealToLinear(CurrRMCB->address));
|
|
HeapFree(GetProcessHeap(), 0, CurrRMCB);
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
|
|
static void FreeRMCB( CONTEXT *context )
|
|
{
|
|
FIXME(int31, "callback address: %04x:%04x\n",
|
|
CX_reg(context), DX_reg(context));
|
|
|
|
if (DPMI_FreeRMCB(MAKELONG(DX_reg(context), CX_reg(context)))) {
|
|
AX_reg(context) = 0x8024; /* invalid callback address */
|
|
SET_CFLAG(context);
|
|
}
|
|
}
|
|
|
|
|
|
void WINAPI DPMI_FreeInternalRMCB( FARPROC16 proc )
|
|
{
|
|
DPMI_FreeRMCB( (DWORD)proc );
|
|
}
|
|
|
|
|
|
#ifdef MZ_SUPPORTED
|
|
/* (see loader/dos/module.c, function MZ_InitDPMI) */
|
|
|
|
static void StartPM( CONTEXT *context, LPDOSTASK lpDosTask )
|
|
{
|
|
char *base = DOSMEM_MemoryBase(0);
|
|
UINT16 cs, ss, ds, es;
|
|
CONTEXT pm_ctx;
|
|
|
|
RESET_CFLAG(context);
|
|
lpDosTask->dpmi_flag = AX_reg(context);
|
|
/* our mode switch wrapper have placed the desired CS into DX */
|
|
cs = SELECTOR_AllocBlock( base + (DWORD)(DX_reg(context)<<4), 0x10000, SEGMENT_CODE, FALSE, FALSE );
|
|
ss = SELECTOR_AllocBlock( base + (DWORD)(SS_reg(context)<<4), 0x10000, SEGMENT_DATA, FALSE, FALSE );
|
|
ds = SELECTOR_AllocBlock( base + (DWORD)(DS_reg(context)<<4), 0x10000, SEGMENT_DATA, FALSE, FALSE );
|
|
es = SELECTOR_AllocBlock( base + (DWORD)(lpDosTask->psp_seg<<4), 0x100, SEGMENT_DATA, FALSE, FALSE );
|
|
|
|
pm_ctx = *context;
|
|
CS_reg(&pm_ctx) = lpDosTask->dpmi_sel;
|
|
/* our mode switch wrapper expects the new CS in DX, and the new SS in AX */
|
|
AX_reg(&pm_ctx) = ss;
|
|
DX_reg(&pm_ctx) = cs;
|
|
DS_reg(&pm_ctx) = ds;
|
|
ES_reg(&pm_ctx) = es;
|
|
FS_reg(&pm_ctx) = 0;
|
|
GS_reg(&pm_ctx) = 0;
|
|
|
|
TRACE(int31,"DOS program is now entering protected mode\n");
|
|
Callbacks->CallRegisterShortProc(&pm_ctx, 0);
|
|
|
|
/* in the current state of affairs, we won't ever actually return here... */
|
|
|
|
UnMapLS(PTR_SEG_OFF_TO_SEGPTR(es,0));
|
|
UnMapLS(PTR_SEG_OFF_TO_SEGPTR(ds,0));
|
|
UnMapLS(PTR_SEG_OFF_TO_SEGPTR(ss,0));
|
|
UnMapLS(PTR_SEG_OFF_TO_SEGPTR(cs,0));
|
|
}
|
|
#endif
|
|
|
|
/**********************************************************************
|
|
* INT_Int31Handler
|
|
*
|
|
* Handler for int 31h (DPMI).
|
|
*/
|
|
|
|
void WINAPI INT_Int31Handler( CONTEXT *context )
|
|
{
|
|
/*
|
|
* Note: For Win32s processes, the whole linear address space is
|
|
* shifted by 0x10000 relative to the OS linear address space.
|
|
* See the comment in msdos/vxd.c.
|
|
*/
|
|
DWORD offset = W32S_APPLICATION() ? W32S_OFFSET : 0;
|
|
|
|
DWORD dw;
|
|
BYTE *ptr;
|
|
|
|
TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
|
|
NE_MODULE *pModule = pTask ? NE_GetPtr( pTask->hModule ) : NULL;
|
|
|
|
GlobalUnlock16( GetCurrentTask() );
|
|
|
|
#ifdef MZ_SUPPORTED
|
|
if (ISV86(context) && pModule && pModule->lpDosTask) {
|
|
/* Called from real mode, check if it's our wrapper */
|
|
TRACE(int31,"called from real mode\n");
|
|
if (CS_reg(context)==pModule->lpDosTask->dpmi_seg) {
|
|
/* This is the protected mode switch */
|
|
StartPM(context,pModule->lpDosTask);
|
|
return;
|
|
} else
|
|
if (CS_reg(context)==pModule->lpDosTask->xms_seg) {
|
|
/* This is the XMS driver entry point */
|
|
XMS_Handler(context);
|
|
return;
|
|
} else
|
|
{
|
|
/* Check for RMCB */
|
|
RMCB *CurrRMCB = FirstRMCB;
|
|
|
|
while (CurrRMCB && (HIWORD(CurrRMCB->address) != CS_reg(context)))
|
|
CurrRMCB = CurrRMCB->next;
|
|
|
|
if (CurrRMCB) {
|
|
/* RMCB call, propagate to protected-mode handler */
|
|
DPMI_CallRMCBProc(context, CurrRMCB, pModule->lpDosTask->dpmi_flag);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
RESET_CFLAG(context);
|
|
switch(AX_reg(context))
|
|
{
|
|
case 0x0000: /* Allocate LDT descriptors */
|
|
TRACE(int31,"allocate LDT descriptors (%d)\n",CX_reg(context));
|
|
if (!(AX_reg(context) = AllocSelectorArray16( CX_reg(context) )))
|
|
{
|
|
TRACE(int31,"failed\n");
|
|
AX_reg(context) = 0x8011; /* descriptor unavailable */
|
|
SET_CFLAG(context);
|
|
}
|
|
TRACE(int31,"success, array starts at 0x%04x\n",AX_reg(context));
|
|
break;
|
|
|
|
case 0x0001: /* Free LDT descriptor */
|
|
TRACE(int31,"free LDT descriptor (0x%04x)\n",BX_reg(context));
|
|
if (FreeSelector16( BX_reg(context) ))
|
|
{
|
|
AX_reg(context) = 0x8022; /* invalid selector */
|
|
SET_CFLAG(context);
|
|
}
|
|
else
|
|
{
|
|
/* If a segment register contains the selector being freed, */
|
|
/* set it to zero. */
|
|
if (!((DS_reg(context)^BX_reg(context)) & ~3)) DS_reg(context) = 0;
|
|
if (!((ES_reg(context)^BX_reg(context)) & ~3)) ES_reg(context) = 0;
|
|
if (!((FS_reg(context)^BX_reg(context)) & ~3)) FS_reg(context) = 0;
|
|
if (!((GS_reg(context)^BX_reg(context)) & ~3)) GS_reg(context) = 0;
|
|
}
|
|
break;
|
|
|
|
case 0x0002: /* Real mode segment to descriptor */
|
|
TRACE(int31,"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:
|
|
AX_reg(context) = DOSMEM_AllocSelector(BX_reg(context));
|
|
break;
|
|
}
|
|
if (entryPoint)
|
|
AX_reg(context) = LOWORD(NE_GetEntryPoint(
|
|
GetModuleHandle16( "KERNEL" ),
|
|
entryPoint ));
|
|
}
|
|
break;
|
|
|
|
case 0x0003: /* Get next selector increment */
|
|
TRACE(int31,"get selector increment (__AHINCR)\n");
|
|
AX_reg(context) = __AHINCR;
|
|
break;
|
|
|
|
case 0x0004: /* Lock selector (not supported) */
|
|
FIXME(int31,"lock selector not supported\n");
|
|
AX_reg(context) = 0; /* FIXME: is this a correct return value? */
|
|
break;
|
|
|
|
case 0x0005: /* Unlock selector (not supported) */
|
|
FIXME(int31,"unlock selector not supported\n");
|
|
AX_reg(context) = 0; /* FIXME: is this a correct return value? */
|
|
break;
|
|
|
|
case 0x0006: /* Get selector base address */
|
|
TRACE(int31,"get selector base address (0x%04x)\n",BX_reg(context));
|
|
if (!(dw = GetSelectorBase( BX_reg(context) )))
|
|
{
|
|
AX_reg(context) = 0x8022; /* invalid selector */
|
|
SET_CFLAG(context);
|
|
}
|
|
else
|
|
{
|
|
#ifdef MZ_SUPPORTED
|
|
if (pModule && pModule->lpDosTask) {
|
|
DWORD base = (DWORD)DOSMEM_MemoryBase(pModule->self);
|
|
if ((dw >= base) && (dw < base + 0x110000)) dw -= base;
|
|
}
|
|
#endif
|
|
CX_reg(context) = HIWORD(W32S_WINE2APP(dw, offset));
|
|
DX_reg(context) = LOWORD(W32S_WINE2APP(dw, offset));
|
|
}
|
|
break;
|
|
|
|
case 0x0007: /* Set selector base address */
|
|
TRACE(int31, "set selector base address (0x%04x,0x%08lx)\n",
|
|
BX_reg(context),
|
|
W32S_APP2WINE(MAKELONG(DX_reg(context),CX_reg(context)), offset));
|
|
dw = W32S_APP2WINE(MAKELONG(DX_reg(context), CX_reg(context)), offset);
|
|
#ifdef MZ_SUPPORTED
|
|
/* well, what else could we possibly do? */
|
|
if (pModule && pModule->lpDosTask) {
|
|
if (dw < 0x110000) dw += (DWORD)DOSMEM_MemoryBase(pModule->self);
|
|
}
|
|
#endif
|
|
SetSelectorBase(BX_reg(context), dw);
|
|
break;
|
|
|
|
case 0x0008: /* Set selector limit */
|
|
TRACE(int31,"set selector limit (0x%04x,0x%08lx)\n",BX_reg(context),MAKELONG(DX_reg(context),CX_reg(context)));
|
|
dw = MAKELONG( DX_reg(context), CX_reg(context) );
|
|
#ifdef MZ_SUPPORTED
|
|
if (pModule && pModule->lpDosTask) {
|
|
DWORD base = GetSelectorBase( BX_reg(context) );
|
|
if ((dw == 0xffffffff) || ((base < 0x110000) && (base + dw > 0x110000))) {
|
|
AX_reg(context) = 0x8021; /* invalid value */
|
|
SET_CFLAG(context);
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
SetSelectorLimit16( BX_reg(context), dw );
|
|
break;
|
|
|
|
case 0x0009: /* Set selector access rights */
|
|
TRACE(int31,"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(int31,"allocate selector alias (0x%04x)\n",BX_reg(context));
|
|
if (!(AX_reg(context) = AllocCStoDSAlias16( BX_reg(context) )))
|
|
{
|
|
AX_reg(context) = 0x8011; /* descriptor unavailable */
|
|
SET_CFLAG(context);
|
|
}
|
|
break;
|
|
|
|
case 0x000b: /* Get descriptor */
|
|
TRACE(int31,"get descriptor (0x%04x)\n",BX_reg(context));
|
|
{
|
|
ldt_entry entry;
|
|
LDT_GetEntry( SELECTOR_TO_ENTRY( BX_reg(context) ), &entry );
|
|
entry.base = W32S_WINE2APP(entry.base, offset);
|
|
|
|
/* FIXME: should use ES:EDI for 32-bit clients */
|
|
LDT_EntryToBytes( PTR_SEG_OFF_TO_LIN( ES_reg(context),
|
|
DI_reg(context) ), &entry );
|
|
}
|
|
break;
|
|
|
|
case 0x000c: /* Set descriptor */
|
|
TRACE(int31,"set descriptor (0x%04x)\n",BX_reg(context));
|
|
{
|
|
ldt_entry entry;
|
|
LDT_BytesToEntry( PTR_SEG_OFF_TO_LIN( ES_reg(context),
|
|
DI_reg(context) ), &entry );
|
|
entry.base = W32S_APP2WINE(entry.base, offset);
|
|
|
|
LDT_SetEntry( SELECTOR_TO_ENTRY( BX_reg(context) ), &entry );
|
|
}
|
|
break;
|
|
|
|
case 0x000d: /* Allocate specific LDT descriptor */
|
|
FIXME(int31,"allocate descriptor (0x%04x), stub!\n",BX_reg(context));
|
|
AX_reg(context) = 0x8011; /* descriptor unavailable */
|
|
SET_CFLAG(context);
|
|
break;
|
|
case 0x0100: /* Allocate DOS memory block */
|
|
TRACE(int31,"allocate DOS memory block (0x%x paragraphs)\n",BX_reg(context));
|
|
dw = GlobalDOSAlloc16((DWORD)BX_reg(context)<<4);
|
|
if (dw) {
|
|
AX_reg(context) = HIWORD(dw);
|
|
DX_reg(context) = LOWORD(dw);
|
|
} else {
|
|
AX_reg(context) = 0x0008; /* insufficient memory */
|
|
BX_reg(context) = DOSMEM_Available(0)>>4;
|
|
SET_CFLAG(context);
|
|
}
|
|
break;
|
|
case 0x0101: /* Free DOS memory block */
|
|
TRACE(int31,"free DOS memory block (0x%04x)\n",DX_reg(context));
|
|
dw = GlobalDOSFree16(DX_reg(context));
|
|
if (!dw) {
|
|
AX_reg(context) = 0x0009; /* memory block address invalid */
|
|
SET_CFLAG(context);
|
|
}
|
|
break;
|
|
case 0x0200: /* get real mode interrupt vector */
|
|
FIXME(int31,"get realmode interupt vector(0x%02x) unimplemented.\n",
|
|
BL_reg(context));
|
|
SET_CFLAG(context);
|
|
break;
|
|
case 0x0201: /* set real mode interrupt vector */
|
|
FIXME(int31, "set realmode interupt vector(0x%02x,0x%04x:0x%04x) unimplemented\n", BL_reg(context),CX_reg(context),DX_reg(context));
|
|
SET_CFLAG(context);
|
|
break;
|
|
case 0x0204: /* Get protected mode interrupt vector */
|
|
TRACE(int31,"get protected mode interrupt handler (0x%02x), stub!\n",BL_reg(context));
|
|
dw = (DWORD)INT_GetPMHandler( BL_reg(context) );
|
|
CX_reg(context) = HIWORD(dw);
|
|
DX_reg(context) = LOWORD(dw);
|
|
break;
|
|
|
|
case 0x0205: /* Set protected mode interrupt vector */
|
|
TRACE(int31,"set protected mode interrupt handler (0x%02x,%p), stub!\n",
|
|
BL_reg(context),PTR_SEG_OFF_TO_LIN(CX_reg(context),DX_reg(context)));
|
|
INT_SetPMHandler( BL_reg(context),
|
|
(FARPROC16)PTR_SEG_OFF_TO_SEGPTR( CX_reg(context),
|
|
DX_reg(context) ));
|
|
break;
|
|
|
|
case 0x0300: /* Simulate real mode interrupt */
|
|
CallRMInt( context );
|
|
break;
|
|
|
|
case 0x0301: /* Call real mode procedure with far return */
|
|
CallRMProc( context, FALSE );
|
|
break;
|
|
|
|
case 0x0302: /* Call real mode procedure with interrupt return */
|
|
CallRMProc( context, TRUE );
|
|
break;
|
|
|
|
case 0x0303: /* Allocate Real Mode Callback Address */
|
|
AllocRMCB( context );
|
|
break;
|
|
|
|
case 0x0304: /* Free Real Mode Callback Address */
|
|
FreeRMCB( context );
|
|
break;
|
|
|
|
case 0x0400: /* Get DPMI version */
|
|
TRACE(int31,"get DPMI version\n");
|
|
{
|
|
SYSTEM_INFO si;
|
|
|
|
GetSystemInfo(&si);
|
|
AX_reg(context) = 0x005a; /* DPMI version 0.90 */
|
|
BX_reg(context) = 0x0005; /* Flags: 32-bit, virtual memory */
|
|
CL_reg(context) = si.wProcessorLevel;
|
|
DX_reg(context) = 0x0102; /* Master/slave interrupt controller base*/
|
|
break;
|
|
}
|
|
case 0x0500: /* Get free memory information */
|
|
TRACE(int31,"get free memory information\n");
|
|
{
|
|
MEMMANINFO mmi;
|
|
|
|
mmi.dwSize = sizeof(mmi);
|
|
MemManInfo16(&mmi);
|
|
ptr = (BYTE *)PTR_SEG_OFF_TO_LIN(ES_reg(context),DI_reg(context));
|
|
/* 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 */
|
|
TRACE(int31,"allocate memory block (%ld)\n",MAKELONG(CX_reg(context),BX_reg(context)));
|
|
if (!(ptr = (BYTE *)DPMI_xalloc(MAKELONG(CX_reg(context), BX_reg(context)))))
|
|
{
|
|
AX_reg(context) = 0x8012; /* linear memory not available */
|
|
SET_CFLAG(context);
|
|
} else {
|
|
BX_reg(context) = SI_reg(context) = HIWORD(W32S_WINE2APP(ptr, offset));
|
|
CX_reg(context) = DI_reg(context) = LOWORD(W32S_WINE2APP(ptr, offset));
|
|
}
|
|
break;
|
|
|
|
case 0x0502: /* Free memory block */
|
|
TRACE(int31, "free memory block (0x%08lx)\n",
|
|
W32S_APP2WINE(MAKELONG(DI_reg(context),SI_reg(context)), offset));
|
|
DPMI_xfree( (void *)W32S_APP2WINE(MAKELONG(DI_reg(context),
|
|
SI_reg(context)), offset) );
|
|
break;
|
|
|
|
case 0x0503: /* Resize memory block */
|
|
TRACE(int31, "resize memory block (0x%08lx,%ld)\n",
|
|
W32S_APP2WINE(MAKELONG(DI_reg(context),SI_reg(context)), offset),
|
|
MAKELONG(CX_reg(context),BX_reg(context)));
|
|
if (!(ptr = (BYTE *)DPMI_xrealloc(
|
|
(void *)W32S_APP2WINE(MAKELONG(DI_reg(context),SI_reg(context)), offset),
|
|
MAKELONG(CX_reg(context),BX_reg(context)))))
|
|
{
|
|
AX_reg(context) = 0x8012; /* linear memory not available */
|
|
SET_CFLAG(context);
|
|
} else {
|
|
BX_reg(context) = SI_reg(context) = HIWORD(W32S_WINE2APP(ptr, offset));
|
|
CX_reg(context) = DI_reg(context) = LOWORD(W32S_WINE2APP(ptr, offset));
|
|
}
|
|
break;
|
|
|
|
case 0x0507: /* Modify page attributes */
|
|
FIXME(int31,"modify page attributes unimplemented\n");
|
|
break; /* Just ignore it */
|
|
|
|
case 0x0600: /* Lock linear region */
|
|
FIXME(int31,"lock linear region unimplemented\n");
|
|
break; /* Just ignore it */
|
|
|
|
case 0x0601: /* Unlock linear region */
|
|
FIXME(int31,"unlock linear region unimplemented\n");
|
|
break; /* Just ignore it */
|
|
|
|
case 0x0602: /* Unlock real-mode region */
|
|
FIXME(int31,"unlock realmode region unimplemented\n");
|
|
break; /* Just ignore it */
|
|
|
|
case 0x0603: /* Lock real-mode region */
|
|
FIXME(int31,"lock realmode region unimplemented\n");
|
|
break; /* Just ignore it */
|
|
|
|
case 0x0604: /* Get page size */
|
|
TRACE(int31,"get pagesize\n");
|
|
BX_reg(context) = 0;
|
|
CX_reg(context) = VIRTUAL_GetPageSize();
|
|
break;
|
|
|
|
case 0x0702: /* Mark page as demand-paging candidate */
|
|
FIXME(int31,"mark page as demand-paging candidate\n");
|
|
break; /* Just ignore it */
|
|
|
|
case 0x0703: /* Discard page contents */
|
|
FIXME(int31,"discard page contents\n");
|
|
break; /* Just ignore it */
|
|
|
|
case 0x0800: /* Physical address mapping */
|
|
FIXME(int31,"map real to linear (0x%08lx)\n",MAKELONG(CX_reg(context),BX_reg(context)));
|
|
if(!(ptr=DOSMEM_MapRealToLinear(MAKELONG(CX_reg(context),BX_reg(context)))))
|
|
{
|
|
AX_reg(context) = 0x8021;
|
|
SET_CFLAG(context);
|
|
}
|
|
else
|
|
{
|
|
BX_reg(context) = HIWORD(W32S_WINE2APP(ptr, offset));
|
|
CX_reg(context) = LOWORD(W32S_WINE2APP(ptr, offset));
|
|
RESET_CFLAG(context);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
INT_BARF( context, 0x31 );
|
|
AX_reg(context) = 0x8001; /* unsupported function */
|
|
SET_CFLAG(context);
|
|
break;
|
|
}
|
|
|
|
}
|