miscemu/int31.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include "msdos.h"
   4 #include "wine.h"
   5
   6 typedef struct {
   7         WORD    accessed    : 1;
   8         WORD    read_write  : 1;
   9         WORD    conf_exp    : 1;
  10         WORD    code        : 1;
  11         WORD    xsystem     : 1;
  12         WORD    dpl         : 2;
  13         WORD    present     : 1;
  14         WORD    dummy       : 8;
  15         } ACCESS;
  16 typedef ACCESS *LPACCESS;
  17
  18 typedef struct {
  19         WORD    Limit;
  20         WORD    addr_lo;
  21         BYTE    addr_hi;
  22         ACCESS  access;
  23         WORD    reserved;
  24         } DESCRIPTOR;
  25 typedef DESCRIPTOR *LPDESCRIPTOR;
  26
  27 HANDLE DPMI_GetNewSelector(WORD selcount);
  28 BOOL DPMI_FreeSelector(HANDLE pmSel);
  29 BOOL DPMI_SetDescriptor(HANDLE pmSel, LPDESCRIPTOR lpDesc);
  30
  31 /*************************************************************************/
  32
  33 int do_int31(struct sigcontext_struct *context)
  34 {
  35         LPDESCRIPTOR lpDesc;
  36         printf("do_int31 // context->sc_eax=%04X\n", context->sc_eax);
  37         switch(context->sc_eax)
  38         {
  39         case 0x0000:
  40                 context->sc_eax = DPMI_GetNewSelector(context->sc_ecx);
  41                 break;
  42         case 0x0001:
  43                 context->sc_eax = DPMI_FreeSelector(context->sc_ebx);
  44                 break;
  45         case 0x000C:
  46                 lpDesc = MAKELONG(context->sc_edi, context->sc_es);
  47                 context->sc_eax = DPMI_SetDescriptor(context->sc_ebx, lpDesc);
  48                 break;
  49         default:
  50                 IntBarf(0x31, context);
  51         };
  52         return 1;
  53 }
  54
  55
  56 /*************************************************************************/
  57
  58
  59 HANDLE DPMI_GetNewSelector(WORD selcount)
  60 {
  61         LPSTR   ptr;
  62         HANDLE  pmSel;
  63         printf("DPMI_GetNewSelector(%d); !\n", selcount);
  64         pmSel = GlobalAlloc(GMEM_FIXED, 4096);
  65         ptr = GlobalLock(pmSel);
  66         printf("DPMI_GetNewSelector() return %04X !\n", pmSel);
  67         return pmSel;
  68 }
  69
  70
  71 BOOL DPMI_FreeSelector(HANDLE pmSel)
  72 {
  73         printf("DPMI_FreeSelector(%04X); !\n", pmSel);
  74         GlobalFree(pmSel);
  75         return 0;
  76 }
  77
  78 BOOL DPMI_SetDescriptor(HANDLE pmSel, LPDESCRIPTOR lpDesc)
  79 {
  80         printf("DPMI_SetDescriptor(%04X, %08X); !\n", pmSel, lpDesc);
  81         printf("DPMI lpDesc->Limit=%u \n", lpDesc->Limit);
  82         printf("DPMI lpDesc->addr_lo=%04X \n", lpDesc->addr_lo);
  83         printf("DPMI lpDesc->addr_hi=%02X \n", lpDesc->addr_hi);
  84         printf("DPMI lpDesc->access.accessed=%u \n", lpDesc->access.accessed);
  85         printf("DPMI lpDesc->access.read_write=%u \n", lpDesc->access.read_write);
  86         printf("DPMI lpDesc->access.conf_exp=%u \n", lpDesc->access.conf_exp);
  87         printf("DPMI lpDesc->access.code=%u \n", lpDesc->access.code);
  88         printf("DPMI lpDesc->access.xsystem=%u \n", lpDesc->access.xsystem);
  89         printf("DPMI lpDesc->access.dpl=%u \n", lpDesc->access.dpl);
  90         printf("DPMI lpDesc->access.present=%u \n", lpDesc->access.present);
  91         printf("DPMI lpDesc->reserved=%04X \n", lpDesc->reserved);
  92         return FALSE;
  93 }
  94