523 lines
17 KiB
C
523 lines
17 KiB
C
/*
|
|
* DPMI 0.9 emulation
|
|
*
|
|
* Copyright 1995 Alexandre Julliard
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include "windows.h"
|
|
#include "heap.h"
|
|
#include "ldt.h"
|
|
#include "module.h"
|
|
#include "miscemu.h"
|
|
#include "drive.h"
|
|
#include "msdos.h"
|
|
#include "toolhelp.h"
|
|
#include "debug.h"
|
|
|
|
#define DOS_GET_DRIVE(reg) ((reg) ? (reg) - 1 : DRIVE_GetCurrentDrive())
|
|
|
|
void CreateBPB(int drive, BYTE *data); /* defined in int21.c */
|
|
|
|
|
|
/* Structure for real-mode callbacks */
|
|
typedef struct
|
|
{
|
|
DWORD edi;
|
|
DWORD esi;
|
|
DWORD ebp;
|
|
DWORD reserved;
|
|
DWORD ebx;
|
|
DWORD edx;
|
|
DWORD ecx;
|
|
DWORD eax;
|
|
WORD fl;
|
|
WORD es;
|
|
WORD ds;
|
|
WORD fs;
|
|
WORD gs;
|
|
WORD ip;
|
|
WORD cs;
|
|
WORD sp;
|
|
WORD ss;
|
|
} REALMODECALL;
|
|
|
|
|
|
|
|
/**********************************************************************
|
|
* INT_GetRealModeContext
|
|
*/
|
|
static void INT_GetRealModeContext( REALMODECALL *call, CONTEXT *context )
|
|
{
|
|
EAX_reg(context) = call->eax;
|
|
EBX_reg(context) = call->ebx;
|
|
ECX_reg(context) = call->ecx;
|
|
EDX_reg(context) = call->edx;
|
|
ESI_reg(context) = call->esi;
|
|
EDI_reg(context) = call->edi;
|
|
EBP_reg(context) = call->ebp;
|
|
EFL_reg(context) = call->fl;
|
|
EIP_reg(context) = call->ip;
|
|
ESP_reg(context) = call->sp;
|
|
CS_reg(context) = call->cs;
|
|
DS_reg(context) = call->ds;
|
|
ES_reg(context) = call->es;
|
|
FS_reg(context) = call->fs;
|
|
GS_reg(context) = call->gs;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* INT_SetRealModeContext
|
|
*/
|
|
static void INT_SetRealModeContext( REALMODECALL *call, CONTEXT *context )
|
|
{
|
|
call->eax = EAX_reg(context);
|
|
call->ebx = EBX_reg(context);
|
|
call->ecx = ECX_reg(context);
|
|
call->edx = EDX_reg(context);
|
|
call->esi = ESI_reg(context);
|
|
call->edi = EDI_reg(context);
|
|
call->ebp = EBP_reg(context);
|
|
call->fl = FL_reg(context);
|
|
call->ip = IP_reg(context);
|
|
call->sp = SP_reg(context);
|
|
call->cs = CS_reg(context);
|
|
call->ds = DS_reg(context);
|
|
call->es = ES_reg(context);
|
|
call->fs = FS_reg(context);
|
|
call->gs = GS_reg(context);
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* INT_DoRealModeInt
|
|
*/
|
|
static void INT_DoRealModeInt( CONTEXT *context )
|
|
{
|
|
CONTEXT realmode_ctx;
|
|
REALMODECALL *call = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context),
|
|
DI_reg(context) );
|
|
INT_GetRealModeContext( call, &realmode_ctx );
|
|
|
|
RESET_CFLAG(context);
|
|
switch (BL_reg(context))
|
|
{
|
|
case 0x2f: /* int2f */
|
|
switch (AH_reg(&realmode_ctx))
|
|
{
|
|
case 0x15:
|
|
/* MSCDEX hook */
|
|
do_mscdex( &realmode_ctx );
|
|
break;
|
|
default:
|
|
SET_CFLAG(context);
|
|
break;
|
|
}
|
|
break;
|
|
case 0x21: /* int21 */
|
|
switch (AH_reg(&realmode_ctx))
|
|
{
|
|
case 0x52:
|
|
ES_reg(&realmode_ctx) = 0;
|
|
EBX_reg(&realmode_ctx) = 0;
|
|
break;
|
|
case 0x65:
|
|
switch (AL_reg(&realmode_ctx))
|
|
{
|
|
case 0x06:
|
|
{/* get collate table */
|
|
/* ES:DI is a REALMODE pointer to 5 byte dosmem
|
|
* we fill that with 0x6, realmode pointer to collateTB
|
|
*/
|
|
char *table = DOSMEM_MapRealToLinear(
|
|
MAKELONG(EDI_reg(&realmode_ctx),ES_reg(&realmode_ctx)));
|
|
*(BYTE*)table = 0x06;
|
|
*(DWORD*)(table+1) = DOSMEM_CollateTable;
|
|
CX_reg(&realmode_ctx) = 258;/*FIXME: size of table?*/
|
|
break;
|
|
}
|
|
default:
|
|
SET_CFLAG(context);
|
|
break;
|
|
}
|
|
break;
|
|
case 0x44:
|
|
switch (AL_reg(&realmode_ctx))
|
|
{
|
|
case 0x0D:
|
|
{/* generic block device request */
|
|
BYTE *dataptr = DOSMEM_MapRealToLinear(
|
|
MAKELONG(EDX_reg(&realmode_ctx),DS_reg(&realmode_ctx)));
|
|
int drive = DOS_GET_DRIVE(BL_reg(&realmode_ctx));
|
|
if (CH_reg(&realmode_ctx) != 0x08)
|
|
{
|
|
SET_CFLAG(context);
|
|
break;
|
|
}
|
|
switch (CL_reg(&realmode_ctx))
|
|
{
|
|
case 0x66:
|
|
{
|
|
char label[12],fsname[9],path[4];
|
|
DWORD serial;
|
|
|
|
strcpy(path,"x:\\");path[0]=drive+'A';
|
|
GetVolumeInformation32A(path,label,12,&serial,NULL,NULL,fsname,9);
|
|
*(WORD*)dataptr = 0;
|
|
memcpy(dataptr+2,&serial,4);
|
|
memcpy(dataptr+6,label ,11);
|
|
memcpy(dataptr+17,fsname,8);
|
|
break;
|
|
}
|
|
case 0x60: /* get device parameters */
|
|
/* used by defrag.exe of win95 */
|
|
memset(dataptr, 0, 0x26);
|
|
dataptr[0] = 0x04;
|
|
dataptr[6] = 0; /* media type */
|
|
if (drive > 1)
|
|
{
|
|
dataptr[1] = 0x05; /* fixed disk */
|
|
setword(&dataptr[2], 0x01); /* non removable */
|
|
setword(&dataptr[4], 0x300); /* # of cylinders */
|
|
}
|
|
else
|
|
{
|
|
dataptr[1] = 0x07; /* block dev, floppy */
|
|
setword(&dataptr[2], 0x02); /* removable */
|
|
setword(&dataptr[4], 80); /* # of cylinders */
|
|
}
|
|
CreateBPB(drive, &dataptr[7]);
|
|
break;
|
|
default:
|
|
SET_CFLAG(context);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
SET_CFLAG(context);
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
SET_CFLAG(context);
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
SET_CFLAG(context);
|
|
break;
|
|
}
|
|
|
|
if (EFL_reg(context)&1)
|
|
FIXME(int31,"%02x: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n",
|
|
BL_reg(context), EAX_reg(&realmode_ctx), EBX_reg(&realmode_ctx),
|
|
ECX_reg(&realmode_ctx), EDX_reg(&realmode_ctx));
|
|
FIXME(int31," ESI=%08lx EDI=%08lx DS=%04lx ES=%04lx\n",
|
|
ESI_reg(&realmode_ctx), EDI_reg(&realmode_ctx),
|
|
DS_reg(&realmode_ctx), ES_reg(&realmode_ctx) );
|
|
INT_SetRealModeContext( call, &realmode_ctx );
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* INT_Int31Handler
|
|
*
|
|
* Handler for int 31h (DPMI).
|
|
*/
|
|
void WINAPI INT_Int31Handler( CONTEXT *context )
|
|
{
|
|
DWORD dw;
|
|
BYTE *ptr;
|
|
|
|
RESET_CFLAG(context);
|
|
switch(AX_reg(context))
|
|
{
|
|
case 0x0000: /* Allocate LDT descriptors */
|
|
if (!(AX_reg(context) = AllocSelectorArray( CX_reg(context) )))
|
|
{
|
|
AX_reg(context) = 0x8011; /* descriptor unavailable */
|
|
SET_CFLAG(context);
|
|
}
|
|
break;
|
|
|
|
case 0x0001: /* Free LDT descriptor */
|
|
if (FreeSelector( 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 */
|
|
{
|
|
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(MODULE_GetEntryPoint(
|
|
GetModuleHandle16( "KERNEL" ),
|
|
entryPoint ));
|
|
}
|
|
break;
|
|
|
|
case 0x0003: /* Get next selector increment */
|
|
AX_reg(context) = __AHINCR;
|
|
break;
|
|
|
|
case 0x0004: /* Lock selector (not supported) */
|
|
AX_reg(context) = 0; /* FIXME: is this a correct return value? */
|
|
break;
|
|
|
|
case 0x0005: /* Unlock selector (not supported) */
|
|
AX_reg(context) = 0; /* FIXME: is this a correct return value? */
|
|
break;
|
|
|
|
case 0x0006: /* Get selector base address */
|
|
if (!(dw = GetSelectorBase( BX_reg(context) )))
|
|
{
|
|
AX_reg(context) = 0x8022; /* invalid selector */
|
|
SET_CFLAG(context);
|
|
}
|
|
else
|
|
{
|
|
CX_reg(context) = HIWORD(dw);
|
|
DX_reg(context) = LOWORD(dw);
|
|
}
|
|
break;
|
|
|
|
case 0x0007: /* Set selector base address */
|
|
SetSelectorBase( BX_reg(context),
|
|
MAKELONG( DX_reg(context), CX_reg(context) ) );
|
|
break;
|
|
|
|
case 0x0008: /* Set selector limit */
|
|
SetSelectorLimit( BX_reg(context),
|
|
MAKELONG( DX_reg(context), CX_reg(context) ) );
|
|
break;
|
|
|
|
case 0x0009: /* Set selector access rights */
|
|
SelectorAccessRights( BX_reg(context), 1, CX_reg(context) );
|
|
break;
|
|
|
|
case 0x000a: /* Allocate selector alias */
|
|
if (!(AX_reg(context) = AllocCStoDSAlias( BX_reg(context) )))
|
|
{
|
|
AX_reg(context) = 0x8011; /* descriptor unavailable */
|
|
SET_CFLAG(context);
|
|
}
|
|
break;
|
|
|
|
case 0x000b: /* Get descriptor */
|
|
{
|
|
ldt_entry entry;
|
|
LDT_GetEntry( SELECTOR_TO_ENTRY( BX_reg(context) ), &entry );
|
|
/* 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 */
|
|
{
|
|
ldt_entry entry;
|
|
LDT_BytesToEntry( PTR_SEG_OFF_TO_LIN( ES_reg(context),
|
|
DI_reg(context) ), &entry );
|
|
LDT_SetEntry( SELECTOR_TO_ENTRY( BX_reg(context) ), &entry );
|
|
}
|
|
break;
|
|
|
|
case 0x000d: /* Allocate specific LDT descriptor */
|
|
AX_reg(context) = 0x8011; /* descriptor unavailable */
|
|
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 */
|
|
dw = (DWORD)INT_GetHandler( BL_reg(context) );
|
|
CX_reg(context) = HIWORD(dw);
|
|
DX_reg(context) = LOWORD(dw);
|
|
break;
|
|
|
|
case 0x0205: /* Set protected mode interrupt vector */
|
|
INT_SetHandler( BL_reg(context),
|
|
(FARPROC16)PTR_SEG_OFF_TO_SEGPTR( CX_reg(context),
|
|
DX_reg(context) ));
|
|
break;
|
|
|
|
case 0x0300: /* Simulate real mode interrupt */
|
|
INT_DoRealModeInt( context );
|
|
break;
|
|
|
|
case 0x0301: /* Call real mode procedure with far return */
|
|
{
|
|
REALMODECALL *p = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) );
|
|
FIXME(int31, "RealModeCall: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n",
|
|
p->eax, p->ebx, p->ecx, p->edx);
|
|
FIXME(int31, " ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x\n",
|
|
p->esi, p->edi, p->es, p->ds, p->cs, p->ip );
|
|
SET_CFLAG(context);
|
|
}
|
|
break;
|
|
|
|
case 0x0302: /* Call real mode procedure with interrupt return */
|
|
{
|
|
REALMODECALL *p = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) );
|
|
FIXME(int31, "RealModeCallIret: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n", p->eax, p->ebx, p->ecx, p->edx);
|
|
FIXME(int31, " ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x\n", p->esi, p->edi, p->es, p->ds, p->cs, p->ip );
|
|
SET_CFLAG(context);
|
|
}
|
|
break;
|
|
|
|
case 0x0303: /* Allocate Real Mode Callback Address */
|
|
{
|
|
REALMODECALL *p = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) );
|
|
FIXME(int31, "AllocRMCB: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n", p->eax, p->ebx, p->ecx, p->edx);
|
|
FIXME(int31, " ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x\n", p->esi, p->edi, p->es, p->ds, p->cs, p->ip);
|
|
FIXME(int31, " Function to call: %04x:%04x\n",
|
|
(WORD)DS_reg(context), SI_reg(context) );
|
|
SET_CFLAG(context);
|
|
}
|
|
break;
|
|
|
|
case 0x0304: /* Free Real Mode Callback Address */
|
|
{
|
|
FIXME(int31, "FreeRMCB: callback address: %04x:%04x\n",
|
|
CX_reg(context), DX_reg(context));
|
|
SET_CFLAG(context);
|
|
}
|
|
break;
|
|
|
|
case 0x0400: /* Get DPMI version */
|
|
{
|
|
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 */
|
|
{
|
|
MEMMANINFO mmi;
|
|
|
|
mmi.dwSize = sizeof(mmi);
|
|
MemManInfo(&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 */
|
|
if (!(ptr = (BYTE *)VirtualAlloc(NULL, MAKELONG(CX_reg(context), BX_reg(context)), MEM_COMMIT, PAGE_EXECUTE_READWRITE)))
|
|
{
|
|
AX_reg(context) = 0x8012; /* linear memory not available */
|
|
SET_CFLAG(context);
|
|
}
|
|
else
|
|
{
|
|
BX_reg(context) = SI_reg(context) = HIWORD(ptr);
|
|
CX_reg(context) = DI_reg(context) = LOWORD(ptr);
|
|
}
|
|
break;
|
|
|
|
case 0x0502: /* Free memory block */
|
|
VirtualFree((void *)MAKELONG(DI_reg(context), SI_reg(context)), 0, MEM_RELEASE);
|
|
break;
|
|
|
|
case 0x0503: /* Resize memory block */
|
|
if (!(ptr = (BYTE *)HeapReAlloc( GetProcessHeap(), 0,
|
|
(void *)MAKELONG(DI_reg(context),SI_reg(context)),
|
|
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(ptr);
|
|
CX_reg(context) = DI_reg(context) = LOWORD(ptr);
|
|
}
|
|
break;
|
|
|
|
case 0x0600: /* Lock linear region */
|
|
break; /* Just ignore it */
|
|
|
|
case 0x0601: /* Unlock linear region */
|
|
break; /* Just ignore it */
|
|
|
|
case 0x0602: /* Unlock real-mode region */
|
|
break; /* Just ignore it */
|
|
|
|
case 0x0603: /* Lock real-mode region */
|
|
break; /* Just ignore it */
|
|
|
|
case 0x0604: /* Get page size */
|
|
BX_reg(context) = 0;
|
|
CX_reg(context) = 4096;
|
|
break;
|
|
|
|
case 0x0702: /* Mark page as demand-paging candidate */
|
|
break; /* Just ignore it */
|
|
|
|
case 0x0703: /* Discard page contents */
|
|
break; /* Just ignore it */
|
|
|
|
case 0x0800: /* Physical address mapping */
|
|
if(!(ptr=DOSMEM_MapRealToLinear(MAKELONG(CX_reg(context),BX_reg(context)))))
|
|
{
|
|
AX_reg(context) = 0x8021;
|
|
SET_CFLAG(context);
|
|
}
|
|
else
|
|
{
|
|
BX_reg(context) = HIWORD(ptr);
|
|
CX_reg(context) = LOWORD(ptr);
|
|
RESET_CFLAG(context);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
INT_BARF( context, 0x31 );
|
|
AX_reg(context) = 0x8001; /* unsupported function */
|
|
SET_CFLAG(context);
|
|
break;
|
|
}
|
|
}
|