183 lines
4.6 KiB
C
183 lines
4.6 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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "windows.h"
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#include "ldt.h"
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#include "registers.h"
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#include "wine.h"
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#include "miscemu.h"
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#include "stddebug.h"
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/* #define DEBUG_INT */
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#include "debug.h"
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/**********************************************************************
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* INT_Int31Handler
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*
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* Handler for int 31h (DPMI).
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*/
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void INT_Int31Handler( struct sigcontext_struct sigcontext )
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{
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#define context (&sigcontext)
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DWORD dw;
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BYTE *ptr;
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ResetCflag;
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switch(AX)
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{
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case 0x0000: /* Allocate LDT descriptors */
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if (!(AX = AllocSelectorArray( CX )))
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{
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AX = 0x8011; /* descriptor unavailable */
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SetCflag;
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}
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break;
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case 0x0001: /* Free LDT descriptor */
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if (FreeSelector( BX ))
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{
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AX = 0x8022; /* invalid selector */
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SetCflag;
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}
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break;
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case 0x0003: /* Get next selector increment */
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AX = __AHINCR;
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break;
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case 0x0004: /* Lock selector (not supported) */
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AX = 0; /* FIXME: is this a correct return value? */
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break;
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case 0x0005: /* Unlock selector (not supported) */
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AX = 0; /* FIXME: is this a correct return value? */
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break;
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case 0x0006: /* Get selector base address */
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if (!(dw = GetSelectorBase( BX )))
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{
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AX = 0x8022; /* invalid selector */
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SetCflag;
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}
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else
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{
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CX = HIWORD(dw);
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DX = LOWORD(dw);
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}
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break;
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case 0x0007: /* Set selector base address */
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SetSelectorBase( BX, MAKELONG( DX, CX ) );
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break;
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case 0x0008: /* Set selector limit */
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SetSelectorLimit( BX, MAKELONG( DX, CX ) );
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break;
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case 0x0009: /* Set selector access rights */
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SelectorAccessRights( BX, 1, CX );
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case 0x000a: /* Allocate selector alias */
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if (!(AX = AllocCStoDSAlias( BX )))
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{
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AX = 0x8011; /* descriptor unavailable */
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SetCflag;
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}
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break;
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case 0x000b: /* Get descriptor */
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{
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ldt_entry entry;
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LDT_GetEntry( SELECTOR_TO_ENTRY(BX), &entry );
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/* FIXME: should use ES:EDI for 32-bit clients */
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LDT_EntryToBytes( PTR_SEG_OFF_TO_LIN( ES, DI ), &entry );
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}
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break;
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case 0x000c: /* Set descriptor */
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{
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ldt_entry entry;
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LDT_BytesToEntry( PTR_SEG_OFF_TO_LIN( ES, DI ), &entry );
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LDT_GetEntry( SELECTOR_TO_ENTRY(BX), &entry );
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}
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break;
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case 0x000d: /* Allocate specific LDT descriptor */
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AX = 0x8011; /* descriptor unavailable */
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SetCflag;
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break;
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case 0x0204: /* Get protected mode interrupt vector */
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dw = (DWORD)INT_GetHandler( BL );
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CX = HIWORD(dw);
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DX = LOWORD(dw);
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break;
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case 0x0205: /* Set protected mode interrupt vector */
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INT_SetHandler( BL, (SEGPTR)MAKELONG( DX, CX ) );
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break;
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case 0x0400: /* Get DPMI version */
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AX = 0x005a; /* DPMI version 0.90 */
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BX = 0x0005; /* Flags: 32-bit, virtual memory */
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CL = 3; /* CPU type: 386 */
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DX = 0x0102; /* Master and slave interrupt controller base */
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break;
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case 0x0500: /* Get free memory information */
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ptr = (BYTE *)PTR_SEG_OFF_TO_LIN( ES, DI );
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*(DWORD *)ptr = 0x00ff0000; /* Largest block available */
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memset( ptr + 4, 0xff, 0x2c ); /* No other information supported */
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break;
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case 0x0501: /* Allocate memory block */
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if (!(ptr = (BYTE *)malloc( MAKELONG( CX, BX ) )))
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{
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AX = 0x8012; /* linear memory not available */
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SetCflag;
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}
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else
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{
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BX = SI = HIWORD(ptr);
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CX = DI = LOWORD(ptr);
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}
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break;
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case 0x0502: /* Free memory block */
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free( (void *)MAKELONG( DI, SI ) );
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break;
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case 0x0503: /* Resize memory block */
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if (!(ptr = (BYTE *)realloc( (void *)MAKELONG(DI,SI),MAKELONG(CX,BX))))
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{
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AX = 0x8012; /* linear memory not available */
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SetCflag;
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}
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else
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{
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BX = SI = HIWORD(ptr);
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CX = DI = LOWORD(ptr);
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}
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break;
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case 0x0600: /* Lock linear region */
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break; /* Just ignore it */
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case 0x0601: /* Unlock linear region */
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break; /* Just ignore it */
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default:
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INT_BARF( 0x31 );
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AX = 0x8001; /* unsupported function */
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SetCflag;
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break;
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}
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#undef context
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}
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