317 lines
10 KiB
C
317 lines
10 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 <unistd.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 "module.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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/* 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 flags;
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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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extern void do_mscdex(struct sigcontext_struct *context);
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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 context )
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{
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DWORD dw;
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BYTE *ptr;
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RESET_CFLAG(&context);
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switch(AX_reg(&context))
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{
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case 0x0000: /* Allocate LDT descriptors */
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if (!(AX_reg(&context) = AllocSelectorArray( CX_reg(&context) )))
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{
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AX_reg(&context) = 0x8011; /* descriptor unavailable */
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SET_CFLAG(&context);
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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_reg(&context) ))
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{
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AX_reg(&context) = 0x8022; /* invalid selector */
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SET_CFLAG(&context);
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}
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break;
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case 0x0002: /* Real mode segment to descriptor */
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{
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WORD entryPoint = 0; /* KERNEL entry point for descriptor */
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switch(BX_reg(&context))
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{
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case 0x0000: entryPoint = 183; break; /* __0000H */
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case 0x0040: entryPoint = 193; break; /* __0040H */
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case 0xa000: entryPoint = 174; break; /* __A000H */
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case 0xb000: entryPoint = 181; break; /* __B000H */
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case 0xb800: entryPoint = 182; break; /* __B800H */
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case 0xc000: entryPoint = 195; break; /* __C000H */
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case 0xd000: entryPoint = 179; break; /* __D000H */
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case 0xe000: entryPoint = 190; break; /* __E000H */
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case 0xf000: entryPoint = 194; break; /* __F000H */
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default:
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fprintf( stderr, "DPMI: real-mode seg to descriptor %04x not possible\n",
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BX_reg(&context) );
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AX_reg(&context) = 0x8011;
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SET_CFLAG(&context);
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break;
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}
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if (entryPoint)
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AX_reg(&context) = LOWORD(MODULE_GetEntryPoint(
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GetModuleHandle( "KERNEL" ),
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entryPoint ));
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}
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break;
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case 0x0003: /* Get next selector increment */
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AX_reg(&context) = __AHINCR;
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break;
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case 0x0004: /* Lock selector (not supported) */
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AX_reg(&context) = 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_reg(&context) = 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_reg(&context) )))
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{
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AX_reg(&context) = 0x8022; /* invalid selector */
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SET_CFLAG(&context);
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}
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else
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{
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CX_reg(&context) = HIWORD(dw);
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DX_reg(&context) = 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_reg(&context),
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MAKELONG( DX_reg(&context), CX_reg(&context) ) );
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break;
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case 0x0008: /* Set selector limit */
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SetSelectorLimit( BX_reg(&context),
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MAKELONG( DX_reg(&context), CX_reg(&context) ) );
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break;
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case 0x0009: /* Set selector access rights */
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SelectorAccessRights( BX_reg(&context), 1, CX_reg(&context) );
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case 0x000a: /* Allocate selector alias */
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if (!(AX_reg(&context) = AllocCStoDSAlias( BX_reg(&context) )))
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{
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AX_reg(&context) = 0x8011; /* descriptor unavailable */
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SET_CFLAG(&context);
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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_reg(&context) ), &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_reg(&context),
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DI_reg(&context) ), &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_reg(&context),
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DI_reg(&context) ), &entry );
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LDT_GetEntry( SELECTOR_TO_ENTRY( BX_reg(&context) ), &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_reg(&context) = 0x8011; /* descriptor unavailable */
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SET_CFLAG(&context);
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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_reg(&context) );
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CX_reg(&context) = HIWORD(dw);
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DX_reg(&context) = 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_reg(&context),
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PTR_SEG_OFF_TO_SEGPTR(CX_reg(&context),DX_reg(&context)));
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break;
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case 0x0300: /* Simulate real mode interrupt
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* Interrupt number is in BL, flags are in BH
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* ES:DI points to real-mode call structure
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* Currently we just print it out and return error.
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*/
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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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fprintf(stdnimp,
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"RealModeInt %02x: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n"
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" ESI=%08lx EDI=%08lx ES=%04x DS=%04x\n",
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BL_reg(&context), p->eax, p->ebx, p->ecx, p->edx,
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p->esi, p->edi, p->es, p->ds );
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/* Compton's 1995 encyclopedia does its MSCDEX calls through
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* this interrupt. Why? Who knows...
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*/
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if ((BL_reg(&context) == 0x2f) && ((p->eax & 0xFF00) == 0x1500))
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{
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struct sigcontext_struct context2;
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EAX_reg(&context2) = p->eax;
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EBX_reg(&context2) = p->ebx;
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ECX_reg(&context2) = p->ecx;
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EDX_reg(&context2) = p->edx;
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ES_reg(&context2) = p->es;
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do_mscdex(&context2);
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p->eax = EAX_reg(&context2);
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p->ebx = EBX_reg(&context2);
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p->ecx = ECX_reg(&context2);
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p->edx = EDX_reg(&context2);
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}
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else SET_CFLAG(&context);
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}
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break;
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case 0x0301: /* Call real mode procedure with far return */
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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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fprintf(stdnimp,
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"RealModeCall: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n"
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" ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x\n",
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p->eax, p->ebx, p->ecx, p->edx,
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p->esi, p->edi, p->es, p->ds, p->cs, p->ip );
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SET_CFLAG(&context);
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}
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break;
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case 0x0302: /* Call real mode procedure with interrupt return */
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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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fprintf(stdnimp,
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"RealModeCallIret: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n"
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" ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x\n",
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p->eax, p->ebx, p->ecx, p->edx,
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p->esi, p->edi, p->es, p->ds, p->cs, p->ip );
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SET_CFLAG(&context);
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}
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break;
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case 0x0400: /* Get DPMI version */
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AX_reg(&context) = 0x005a; /* DPMI version 0.90 */
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BX_reg(&context) = 0x0005; /* Flags: 32-bit, virtual memory */
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CL_reg(&context) = runtime_cpu ();
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DX_reg(&context) = 0x0102; /* Master/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_reg(&context), DI_reg(&context) );
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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_reg(&context),
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BX_reg(&context) ) )))
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{
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AX_reg(&context) = 0x8012; /* linear memory not available */
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SET_CFLAG(&context);
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}
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else
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{
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BX_reg(&context) = SI_reg(&context) = HIWORD(ptr);
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CX_reg(&context) = DI_reg(&context) = 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_reg(&context), SI_reg(&context) ) );
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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_reg(&context),SI_reg(&context)),
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MAKELONG(CX_reg(&context),BX_reg(&context)))))
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{
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AX_reg(&context) = 0x8012; /* linear memory not available */
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SET_CFLAG(&context);
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}
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else
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{
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BX_reg(&context) = SI_reg(&context) = HIWORD(ptr);
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CX_reg(&context) = DI_reg(&context) = 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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case 0x0602: /* Unlock real-mode region */
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break; /* Just ignore it */
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case 0x0603: /* Lock real-mode region */
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break; /* Just ignore it */
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case 0x0604: /* Get page size */
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BX_reg(&context) = 0;
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CX_reg(&context) = 4096;
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break;
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case 0x0702: /* Mark page as demand-paging candidate */
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break; /* Just ignore it */
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case 0x0703: /* Discard page contents */
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break; /* Just ignore it */
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default:
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INT_BARF( &context, 0x31 );
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AX_reg(&context) = 0x8001; /* unsupported function */
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SET_CFLAG(&context);
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break;
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}
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}
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