1082 lines
35 KiB
C
1082 lines
35 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 "config.h"
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#include "windef.h"
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#include "wine/winbase16.h"
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#include "ldt.h"
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#include "builtin16.h"
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#include "global.h"
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#include "miscemu.h"
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#include "msdos.h"
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#include "dosexe.h"
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#include "task.h"
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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 "debugtools.h"
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DEFAULT_DEBUG_CHANNEL(int31);
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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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/**********************************************************************
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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 = (char *) 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("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("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,DWORD 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("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("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, CONTEXT86 *context )
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{
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context->Eax = call->eax;
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context->Ebx = call->ebx;
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context->Ecx = call->ecx;
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context->Edx = call->edx;
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context->Esi = call->esi;
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context->Edi = call->edi;
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context->Ebp = call->ebp;
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context->EFlags = call->fl | V86_FLAG;
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context->Eip = call->ip;
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context->Esp = call->sp;
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context->SegCs = call->cs;
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context->SegDs = call->ds;
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context->SegEs = call->es;
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context->SegFs = call->fs;
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context->SegGs = call->gs;
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context->SegSs = call->ss;
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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, CONTEXT86 *context )
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{
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call->eax = context->Eax;
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call->ebx = context->Ebx;
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call->ecx = context->Ecx;
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call->edx = context->Edx;
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call->esi = context->Esi;
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call->edi = context->Edi;
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call->ebp = context->Ebp;
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call->fl = LOWORD(context->EFlags);
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call->ip = LOWORD(context->Eip);
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call->sp = LOWORD(context->Esp);
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call->cs = context->SegCs;
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call->ds = context->SegDs;
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call->es = context->SegEs;
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call->fs = context->SegFs;
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call->gs = context->SegGs;
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call->ss = context->SegSs;
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}
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#ifdef __i386__
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void DPMI_CallRMCB32(RMCB *rmcb, UINT16 ss, DWORD esp, UINT16*es, DWORD*edi)
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#if 0 /* original code, which early gccs puke on */
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{
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int _clobber;
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__asm__ __volatile__(
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"pushl %%ebp\n"
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"pushl %%ebx\n"
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"pushl %%es\n"
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"pushl %%ds\n"
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"pushfl\n"
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"mov %7,%%es\n"
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"mov %5,%%ds\n"
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".byte 0x36, 0xff, 0x18\n" /* lcall *%ss:(%eax) */
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"popl %%ds\n"
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"mov %%es,%0\n"
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"popl %%es\n"
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"popl %%ebx\n"
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"popl %%ebp\n"
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: "=d" (*es), "=D" (*edi), "=S" (_clobber), "=a" (_clobber), "=c" (_clobber)
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: "0" (ss), "2" (esp),
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"4" (rmcb->regs_sel), "1" (rmcb->regs_ofs),
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"3" (&rmcb->proc_ofs) );
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}
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#else /* code generated by a gcc new enough */
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;
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__ASM_GLOBAL_FUNC(DPMI_CallRMCB32,
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"pushl %ebp\n\t"
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"movl %esp,%ebp\n\t"
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"pushl %edi\n\t"
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"pushl %esi\n\t"
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"movl 0x8(%ebp),%eax\n\t"
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"movl 0x10(%ebp),%esi\n\t"
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"movl 0xc(%ebp),%edx\n\t"
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"movl 0x10(%eax),%ecx\n\t"
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"movl 0xc(%eax),%edi\n\t"
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"addl $0x4,%eax\n\t"
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"pushl %ebp\n\t"
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"pushl %ebx\n\t"
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"pushl %es\n\t"
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"pushl %ds\n\t"
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"pushfl\n\t"
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"mov %cx,%es\n\t"
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"mov %dx,%ds\n\t"
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".byte 0x36, 0xff, 0x18\n\t" /* lcall *%ss:(%eax) */
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"popl %ds\n\t"
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"mov %es,%dx\n\t"
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"popl %es\n\t"
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"popl %ebx\n\t"
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"popl %ebp\n\t"
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"movl 0x14(%ebp),%eax\n\t"
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"movw %dx,(%eax)\n\t"
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"movl 0x18(%ebp),%edx\n\t"
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"movl %edi,(%edx)\n\t"
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"popl %esi\n\t"
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"popl %edi\n\t"
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"leave\n\t"
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"ret")
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#endif
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#endif /* __i386__ */
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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( CONTEXT86 *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 esp,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( (void *)(context->SegSs<<4), 0x10000, WINE_LDT_FLAGS_DATA );
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esp = context->Esp;
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FIXME("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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/* 32-bit DPMI client */
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DPMI_CallRMCB32(rmcb, ss, esp, &es, &edi);
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} else {
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/* 16-bit DPMI client */
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CONTEXT86 ctx = *context;
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ctx.SegCs = rmcb->proc_sel;
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ctx.Eip = rmcb->proc_ofs;
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ctx.SegDs = ss;
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ctx.Esi = esp;
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ctx.SegEs = rmcb->regs_sel;
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ctx.Edi = rmcb->regs_ofs;
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/* FIXME: I'm pretty sure this isn't right - should push flags first */
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CallTo16RegisterShort(&ctx, 0);
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es = ctx.SegEs;
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edi = ctx.Edi;
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}
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FreeSelector16(ss);
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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("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( CONTEXT86 *context, LPWORD stack, int args, int iret )
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{
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LPWORD stack16;
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LPVOID addr = NULL; /* avoid gcc warning */
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LPDOSTASK lpDosTask = MZ_Current();
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RMCB *CurrRMCB;
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int alloc = 0, already = 0;
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BYTE *code;
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GlobalUnlock16( GetCurrentTask() );
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TRACE("EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n",
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context->Eax, context->Ebx, context->Ecx, context->Edx );
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TRACE("ESI=%08lx EDI=%08lx ES=%04lx DS=%04lx CS:IP=%04lx:%04x, %d WORD arguments, %s\n",
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context->Esi, context->Edi, context->SegEs, context->SegDs,
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context->SegCs, LOWORD(context->Eip), args, iret?"IRET":"FAR" );
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callrmproc_again:
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/* there might be some code that just jumps to RMCBs or the like,
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in which case following the jumps here might get us to a shortcut */
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code = CTX_SEG_OFF_TO_LIN(context, context->SegCs, context->Eip);
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switch (*code) {
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case 0xe9: /* JMP NEAR */
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context->Eip += 3 + *(WORD *)(code+1);
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/* yeah, I know these gotos don't look good... */
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goto callrmproc_again;
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case 0xea: /* JMP FAR */
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context->Eip = *(WORD *)(code+1);
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context->SegCs = *(WORD *)(code+3);
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/* ...but since the label is there anyway... */
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goto callrmproc_again;
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case 0xeb: /* JMP SHORT */
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context->Eip += 2 + *(signed char *)(code+1);
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/* ...because of other gotos below, so... */
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goto callrmproc_again;
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}
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/* shortcut for chaining to internal interrupt handlers */
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if ((context->SegCs == 0xF000) && iret) {
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return INT_RealModeInterrupt( LOWORD(context->Eip)/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) != context->SegCs))
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CurrRMCB = CurrRMCB->next;
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if (!(CurrRMCB || lpDosTask)) {
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FIXME("DPMI real-mode call using DOS VM task system, not fully tested!\n");
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TRACE("creating VM86 task\n");
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if (!(lpDosTask = MZ_AllocDPMITask() )) {
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ERR("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 (!context->SegSs) {
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alloc = 1; /* allocate default stack */
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stack16 = addr = DOSMEM_GetBlock( 64, (UINT16 *)&(context->SegSs) );
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context->Esp = 64-2;
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stack16 += 32-1;
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if (!addr) {
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ERR("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, context->SegSs, context->Esp);
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}
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context->Esp -= (args + (iret?1:0)) * sizeof(WORD);
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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 = LOWORD(context->EFlags);
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}
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/* push return address (return to interrupt wrapper) */
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*(--stack16) = DOSMEM_wrap_seg;
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*(--stack16) = 0;
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/* adjust stack */
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context->Esp -= 2*sizeof(WORD);
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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, lpDosTask ? lpDosTask->dpmi_flag : 0);
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/* check if we returned to where we thought we would */
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if ((context->SegCs != DOSMEM_wrap_seg) ||
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(LOWORD(context->Eip) != 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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TRACE("entering real mode...\n");
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DOSVM_Enter( context );
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TRACE("returned from real-mode call\n");
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}
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if (alloc) DOSMEM_FreeBlock( addr );
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return 0;
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}
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|
|
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/**********************************************************************
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* CallRMInt
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*/
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static void CallRMInt( CONTEXT86 *context )
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{
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CONTEXT86 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( context->SegEs,
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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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realmode_ctx.SegCs = HIWORD(rm_int);
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realmode_ctx.Eip = 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 (context->EFlags & 1) {
|
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FIXME("%02x: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n",
|
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BL_reg(context), realmode_ctx.Eax, realmode_ctx.Ebx,
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realmode_ctx.Ecx, realmode_ctx.Edx);
|
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FIXME(" ESI=%08lx EDI=%08lx DS=%04lx ES=%04lx\n",
|
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realmode_ctx.Esi, realmode_ctx.Edi,
|
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realmode_ctx.SegDs, realmode_ctx.SegEs );
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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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|
|
|
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static void CallRMProc( CONTEXT86 *context, int iret )
|
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{
|
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REALMODECALL *p = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( context->SegEs, DI_reg(context) );
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CONTEXT86 context16;
|
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|
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TRACE("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(" 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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|
|
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if (!(p->cs) && !(p->ip)) { /* remove this check
|
|
if Int21/6501 case map function
|
|
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(context->SegSs, LOWORD(context->Esp)))+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 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;
|
|
}
|
|
|
|
|
|
static void AllocRMCB( CONTEXT86 *context )
|
|
{
|
|
RMCB *NewRMCB = DPMI_AllocRMCB();
|
|
|
|
TRACE("Function to call: %04x:%04x\n", (WORD)context->SegDs, SI_reg(context) );
|
|
|
|
if (NewRMCB)
|
|
{
|
|
/* FIXME: if 32-bit DPMI client, use ESI and EDI */
|
|
NewRMCB->proc_ofs = LOWORD(context->Esi);
|
|
NewRMCB->proc_sel = context->SegDs;
|
|
NewRMCB->regs_ofs = 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);
|
|
}
|
|
}
|
|
|
|
|
|
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(DOSMEM_MapRealToLinear(CurrRMCB->address));
|
|
HeapFree(GetProcessHeap(), 0, CurrRMCB);
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
|
|
static void 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);
|
|
}
|
|
}
|
|
|
|
|
|
void WINAPI DPMI_FreeInternalRMCB( FARPROC16 proc )
|
|
{
|
|
DPMI_FreeRMCB( (DWORD)proc );
|
|
}
|
|
|
|
|
|
/* (see dosmem.c, function DOSMEM_InitDPMI) */
|
|
|
|
static void StartPM( CONTEXT86 *context, LPDOSTASK lpDosTask )
|
|
{
|
|
UINT16 cs, ss, ds, es;
|
|
CONTEXT86 pm_ctx;
|
|
DWORD psp_ofs = (DWORD)(lpDosTask->psp_seg<<4);
|
|
PDB16 *psp = (PDB16 *)psp_ofs;
|
|
HANDLE16 env_seg = psp->environment;
|
|
unsigned char selflags = WINE_LDT_FLAGS_DATA;
|
|
|
|
RESET_CFLAG(context);
|
|
lpDosTask->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 (lpDosTask->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 = DOSMEM_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 protected mode\n");
|
|
CallTo16RegisterShort(&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);
|
|
}
|
|
|
|
/* DPMI Raw Mode Switch handler */
|
|
|
|
#if 0
|
|
void WINAPI DPMI_RawModeSwitch( SIGCONTEXT *context )
|
|
{
|
|
LPDOSTASK lpDosTask = MZ_Current();
|
|
CONTEXT86 rm_ctx;
|
|
int ret;
|
|
|
|
if (!lpDosTask) {
|
|
/* we could probably start a DPMI-only dosmod task here, but I doubt
|
|
anything other than real DOS apps want to call raw mode switch */
|
|
ERR("attempting raw mode switch without DOS task!\n");
|
|
ExitProcess(1);
|
|
}
|
|
/* initialize real-mode context as per spec */
|
|
memset(&rm_ctx, 0, sizeof(rm_ctx));
|
|
rm_ctx.SegDs = AX_sig(context);
|
|
rm_ctx.SegEs = CX_sig(context);
|
|
rm_ctx.SegSs = DX_sig(context);
|
|
rm_ctx.Esp = EBX_sig(context);
|
|
rm_ctx.SegCs = SI_sig(context);
|
|
rm_ctx.Eip = EDI_sig(context);
|
|
rm_ctx.Ebp = EBP_sig(context);
|
|
rm_ctx.SegFs = 0;
|
|
rm_ctx.SegGs = 0;
|
|
rm_ctx.EFlags = EFL_sig(context); /* 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) {
|
|
/* if the sync was lost, there's no way to recover */
|
|
ExitProcess(1);
|
|
}
|
|
|
|
/* alter protected-mode context as per spec */
|
|
DS_sig(context) = LOWORD(rm_ctx.Eax);
|
|
ES_sig(context) = LOWORD(rm_ctx.Ecx);
|
|
SS_sig(context) = LOWORD(rm_ctx.Edx);
|
|
ESP_sig(context) = rm_ctx.Ebx;
|
|
CS_sig(context) = LOWORD(rm_ctx.Esi);
|
|
EIP_sig(context) = rm_ctx.Edi;
|
|
EBP_sig(context) = rm_ctx.Ebp;
|
|
FS_sig(context) = 0;
|
|
GS_sig(context) = 0;
|
|
|
|
/* Return to new address and hope that we didn't mess up */
|
|
TRACE("re-entering protected mode at %04x:%08lx\n",
|
|
CS_sig(context), EIP_sig(context));
|
|
}
|
|
#endif
|
|
|
|
|
|
/**********************************************************************
|
|
* INT_Int31Handler
|
|
*
|
|
* Handler for int 31h (DPMI).
|
|
*/
|
|
|
|
void WINAPI INT_Int31Handler( CONTEXT86 *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;
|
|
|
|
LPDOSTASK lpDosTask = MZ_Current();
|
|
|
|
if (ISV86(context) && lpDosTask) {
|
|
/* Called from real mode, check if it's our wrapper */
|
|
TRACE("called from real mode\n");
|
|
if (context->SegCs==DOSMEM_dpmi_seg) {
|
|
/* This is the protected mode switch */
|
|
StartPM(context,lpDosTask);
|
|
return;
|
|
} else
|
|
if (context->SegCs==DOSMEM_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) != context->SegCs))
|
|
CurrRMCB = CurrRMCB->next;
|
|
|
|
if (CurrRMCB) {
|
|
/* RMCB call, propagate to protected-mode handler */
|
|
DPMI_CallRMCBProc(context, CurrRMCB, lpDosTask->dpmi_flag);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
RESET_CFLAG(context);
|
|
switch(AX_reg(context))
|
|
{
|
|
case 0x0000: /* Allocate LDT descriptors */
|
|
TRACE("allocate LDT descriptors (%d)\n",CX_reg(context));
|
|
if (!(context->Eax = AllocSelectorArray16( CX_reg(context) )))
|
|
{
|
|
TRACE("failed\n");
|
|
context->Eax = 0x8011; /* descriptor unavailable */
|
|
SET_CFLAG(context);
|
|
}
|
|
TRACE("success, array starts at 0x%04x\n",AX_reg(context));
|
|
break;
|
|
|
|
case 0x0001: /* Free LDT descriptor */
|
|
TRACE("free LDT descriptor (0x%04x)\n",BX_reg(context));
|
|
if (FreeSelector16( BX_reg(context) ))
|
|
{
|
|
context->Eax = 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:
|
|
context->Eax = DOSMEM_AllocSelector(BX_reg(context));
|
|
break;
|
|
}
|
|
if (entryPoint)
|
|
context->Eax = LOWORD(NE_GetEntryPoint( GetModuleHandle16( "KERNEL" ),
|
|
entryPoint ));
|
|
}
|
|
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));
|
|
if (!(dw = GetSelectorBase( BX_reg(context) )))
|
|
{
|
|
context->Eax = 0x8022; /* invalid selector */
|
|
SET_CFLAG(context);
|
|
}
|
|
else
|
|
{
|
|
CX_reg(context) = HIWORD(W32S_WINE2APP(dw, offset));
|
|
DX_reg(context) = LOWORD(W32S_WINE2APP(dw, offset));
|
|
}
|
|
break;
|
|
|
|
case 0x0007: /* Set selector base address */
|
|
TRACE("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);
|
|
if (dw < 0x10000)
|
|
/* app wants to access lower 64K of DOS memory, map it in now */
|
|
DOSMEM_Init(TRUE);
|
|
SetSelectorBase(BX_reg(context), dw);
|
|
break;
|
|
|
|
case 0x0008: /* Set selector limit */
|
|
TRACE("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) );
|
|
SetSelectorLimit16( BX_reg(context), dw );
|
|
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 (!(AX_reg(context) = AllocCStoDSAlias16( BX_reg(context) )))
|
|
{
|
|
AX_reg(context) = 0x8011; /* descriptor unavailable */
|
|
SET_CFLAG(context);
|
|
}
|
|
break;
|
|
|
|
case 0x000b: /* Get descriptor */
|
|
TRACE("get descriptor (0x%04x)\n",BX_reg(context));
|
|
{
|
|
LDT_ENTRY entry;
|
|
wine_ldt_set_base( &entry, (void*)W32S_WINE2APP(wine_ldt_get_base(&entry), offset) );
|
|
/* FIXME: should use ES:EDI for 32-bit clients */
|
|
*(LDT_ENTRY *)PTR_SEG_OFF_TO_LIN( context->SegEs, LOWORD(context->Edi) ) = entry;
|
|
}
|
|
break;
|
|
|
|
case 0x000c: /* Set descriptor */
|
|
TRACE("set descriptor (0x%04x)\n",BX_reg(context));
|
|
{
|
|
LDT_ENTRY entry = *(LDT_ENTRY *)PTR_SEG_OFF_TO_LIN( context->SegEs,
|
|
LOWORD(context->Edi) );
|
|
wine_ldt_set_base( &entry, (void*)W32S_APP2WINE(wine_ldt_get_base(&entry), offset) );
|
|
wine_ldt_set_entry( LOWORD(context->Ebx), &entry );
|
|
}
|
|
break;
|
|
|
|
case 0x000d: /* Allocate specific LDT descriptor */
|
|
FIXME("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("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()>>4;
|
|
SET_CFLAG(context);
|
|
}
|
|
break;
|
|
case 0x0101: /* Free DOS memory block */
|
|
TRACE("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("get realmode interupt vector(0x%02x) unimplemented.\n",
|
|
BL_reg(context));
|
|
SET_CFLAG(context);
|
|
break;
|
|
case 0x0201: /* set real mode interrupt vector */
|
|
FIXME("set realmode interrupt 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("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("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 0x0305: /* Get State Save/Restore Addresses */
|
|
TRACE("get state save/restore addresses\n");
|
|
/* we probably won't need this kind of state saving */
|
|
AX_reg(context) = 0;
|
|
/* real mode: just point to the lret */
|
|
BX_reg(context) = DOSMEM_wrap_seg;
|
|
context->Ecx = 2;
|
|
/* protected mode: don't have any handler yet... */
|
|
FIXME("no protected-mode dummy state save/restore handler yet\n");
|
|
SI_reg(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 */
|
|
BX_reg(context) = DOSMEM_wrap_seg;
|
|
context->Ecx = 0;
|
|
/* protected mode, point to DPMI call wrapper */
|
|
SI_reg(context) = DOSMEM_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);
|
|
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("get free memory information\n");
|
|
{
|
|
MEMMANINFO mmi;
|
|
|
|
mmi.dwSize = sizeof(mmi);
|
|
MemManInfo16(&mmi);
|
|
ptr = (BYTE *)PTR_SEG_OFF_TO_LIN(context->SegEs,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("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("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("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("modify 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");
|
|
BX_reg(context) = 0;
|
|
CX_reg(context) = VIRTUAL_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("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;
|
|
}
|
|
|
|
}
|