440 lines
14 KiB
C
440 lines
14 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 <string.h>
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#include "windows.h"
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#include "heap.h"
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#include "ldt.h"
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#include "module.h"
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#include "miscemu.h"
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#include "drive.h"
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#include "msdos.h"
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#include "toolhelp.h"
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#include "stddebug.h"
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#include "debug.h"
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#define DOS_GET_DRIVE(reg) ((reg) ? (reg) - 1 : DRIVE_GetCurrentDrive())
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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( CONTEXT *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( CONTEXT *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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else
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{
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/* If a segment register contains the selector being freed, */
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/* set it to zero. */
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if (!((DS_reg(context)^BX_reg(context)) & ~3)) DS_reg(context) = 0;
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if (!((ES_reg(context)^BX_reg(context)) & ~3)) ES_reg(context) = 0;
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if (!((FS_reg(context)^BX_reg(context)) & ~3)) FS_reg(context) = 0;
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if (!((GS_reg(context)^BX_reg(context)) & ~3)) GS_reg(context) = 0;
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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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AX_reg(context) = DOSMEM_AllocSelector(BX_reg(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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break;
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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 0x0200: /* get real mode interrupt vector */
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fprintf(stdnimp,
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"int31: get realmode interupt vector(0x%02x) unimplemented.\n",
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BL_reg(context)
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);
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SET_CFLAG(context);
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break;
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case 0x0201: /* set real mode interrupt vector */
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fprintf(stdnimp,
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"int31: set realmode interupt vector(0x%02x,0x%04x:0x%04x) unimplemented\n",
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BL_reg(context),CX_reg(context),DX_reg(context)
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);
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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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(FARPROC16)PTR_SEG_OFF_TO_SEGPTR( CX_reg(context),
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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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RESET_CFLAG(context);
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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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switch (BL_reg(context)) {
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case 0x2f: /* int2f */
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switch ((p->eax & 0xFF00)>>8) {
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case 0x15:
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/* MSCDEX hook */
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AX_reg(context) = p->eax & 0xFFFF;
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do_mscdex( context );
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break;
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default:
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SET_CFLAG(context);
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break;
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}
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break;
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case 0x21: /* int21 */
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switch ((p->eax & 0xFF00)>>8) {
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case 0x65:
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switch (p->eax & 0xFF) {
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case 06:{/* get collate table */
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char *table;
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/* ES:DI is a REALMODE pointer to 5 byte dosmem
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* we fill that with 0x6, realmode pointer to collateTB
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*/
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table = DOSMEM_RealMode2Linear(MAKELONG(p->edi,p->es));
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*(BYTE*)table = 0x06;
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*(DWORD*)(table+1) = DOSMEM_CollateTable;
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CX_reg(context) = 258;/*FIXME: size of table?*/
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break;
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}
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default:
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SET_CFLAG(context);
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}
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break;
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case 0x44:
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switch (p->eax & 0xFF) {
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case 0x0D:{/* generic block device request */
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BYTE *dataptr = DOSMEM_RealMode2Linear((p->ds)*0x1000+(p->edx & 0xFFFF));
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int drive = DOS_GET_DRIVE(p->ebx&0xFF);
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if ((p->ecx & 0xFF00) != 0x0800) {
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SET_CFLAG(context);
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break;
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}
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switch (p->ecx & 0xFF) {
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case 0x66:{
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char label[12],fsname[9],path[4];
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DWORD serial;
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strcpy(path,"x:\\");path[0]=drive+'A';
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GetVolumeInformation32A(path,label,12,&serial,NULL,NULL,fsname,9);
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*(WORD*)dataptr = 0;
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memcpy(dataptr+2,&serial,4);
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memcpy(dataptr+6,label ,11);
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memcpy(dataptr+17,fsname,8);
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break;
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}
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case 0x60: /* get device parameters */
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/* used by defrag.exe of win95 */
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memset(dataptr, 0, 0x26);
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dataptr[0] = 0x04;
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dataptr[6] = 0; /* media type */
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if (drive > 1) {
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dataptr[1] = 0x05; /* fixed disk */
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setword(&dataptr[2], 0x01); /* non removable */
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setword(&dataptr[4], 0x300); /* # of cylinders */
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} else {
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dataptr[1] = 0x07; /* block dev, floppy */
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setword(&dataptr[2], 0x02); /* removable */
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setword(&dataptr[4], 80); /* # of cylinders */
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}
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CreateBPB(drive, &dataptr[7]);
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break;
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default:
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SET_CFLAG(context);
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break;
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}
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}
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break;
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default:
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SET_CFLAG(context);
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break;
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}
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default:
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SET_CFLAG(context);
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break;
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}
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break;
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default:
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SET_CFLAG(context);
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break;
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}
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if (EFL_reg(context)&1) {
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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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);
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}
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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 0x0303: /* Allocate Real Mode Callback Address */
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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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"AllocRMCB: 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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" Function to call: %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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(WORD)DS_reg(context), SI_reg(context) );
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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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{
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MEMMANINFO mmi;
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mmi.dwSize = sizeof(mmi);
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MemManInfo(&mmi);
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ptr = (BYTE *)PTR_SEG_OFF_TO_LIN(ES_reg(context),DI_reg(context));
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/* the layout is just the same as MEMMANINFO, but without
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* the dwSize entry.
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*/
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memcpy(ptr,((char*)&mmi)+4,sizeof(mmi)-4);
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break;
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}
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case 0x0501: /* Allocate memory block */
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if (!(ptr = (BYTE *)HeapAlloc( SystemHeap, 0,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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HeapFree( SystemHeap, 0,
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(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 *)HeapReAlloc( SystemHeap, 0,
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(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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