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Simulates DPMI memory map by converting lower-MB segment base

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addresses as necessary. Implemented allocating/freeing DOS memory
blocks. Added XMS hook. (DPMI remains disabled by default until
someone implements the raw mode switch entry points pkunzip needs.)
This commit is contained in:
Ove Kaaven 1998-10-11 12:26:00 +00:00 committed by Alexandre Julliard
parent c6e16c3a4a
commit a7cf4eecf2
1 changed files with 55 additions and 4 deletions
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59
msdos/dpmi.c
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@ -400,6 +400,11 @@ void WINAPI INT_Int31Handler( CONTEXT *context )
/* 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;
}
}
#endif
@ -486,6 +491,12 @@ void WINAPI INT_Int31Handler( CONTEXT *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(WineToApp(dw));
DX_reg(context) = LOWORD(WineToApp(dw));
}
@ -495,14 +506,30 @@ void WINAPI INT_Int31Handler( CONTEXT *context )
TRACE(int31, "set selector base address (0x%04x,0x%08lx)\n",
BX_reg(context),
AppToWine(MAKELONG(DX_reg(context),CX_reg(context))));
SetSelectorBase(BX_reg(context),
AppToWine(MAKELONG(DX_reg(context), CX_reg(context))));
dw = AppToWine(MAKELONG(DX_reg(context), CX_reg(context)));
#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)));
SetSelectorLimit( 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
SetSelectorLimit( BX_reg(context), dw );
break;
case 0x0009: /* Set selector access rights */
@ -549,6 +576,26 @@ void WINAPI INT_Int31Handler( CONTEXT *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 = GlobalDOSAlloc((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 = GlobalDOSFree(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));
@ -659,6 +706,10 @@ void WINAPI INT_Int31Handler( CONTEXT *context )
}
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 */