miscemu/int31.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include "registers.h"
   4 #include "wine.h"
   5 #include "miscemu.h"
   6 #include "stddebug.h"
   7 /* #define DEBUG_INT */
   8 #include "debug.h"
   9
  10 typedef struct {
  11         WORD    accessed    : 1;
  12         WORD    read_write  : 1;
  13         WORD    conf_exp    : 1;
  14         WORD    code        : 1;
  15         WORD    xsystem     : 1;
  16         WORD    dpl         : 2;
  17         WORD    present     : 1;
  18         WORD    dummy       : 8;
  19         } ACCESS;
  20 typedef ACCESS *LPACCESS;
  21
  22 typedef struct {
  23         WORD    Limit;
  24         WORD    addr_lo;
  25         BYTE    addr_hi;
  26         ACCESS  access;
  27         WORD    reserved;
  28         } DESCRIPTOR;
  29 typedef DESCRIPTOR *LPDESCRIPTOR;
  30
  31 HANDLE DPMI_GetNewSelector(WORD selcount);
  32 BOOL DPMI_FreeSelector(HANDLE pmSel);
  33 BOOL DPMI_SetDescriptor(HANDLE pmSel, LPDESCRIPTOR lpDesc);
  34
  35 /*************************************************************************/
  36
  37 int do_int31(struct sigcontext_struct *context)
  38 {
  39         LPDESCRIPTOR lpDesc;
  40         dprintf_int(stddeb,"do_int31 // context->sc_eax=%08lX\n",
  41                 context->sc_eax);
  42         switch(context->sc_eax)
  43         {
  44         case 0x0000:
  45                 context->sc_eax = DPMI_GetNewSelector(context->sc_ecx);
  46                 break;
  47         case 0x0001:
  48                 context->sc_eax = DPMI_FreeSelector(context->sc_ebx);
  49                 break;
  50         case 0x000C:
  51                 lpDesc = (LPDESCRIPTOR) MAKELONG(context->sc_edi,
  52                                                  context->sc_es);
  53                 context->sc_eax = DPMI_SetDescriptor(context->sc_ebx, lpDesc);
  54                 break;
  55         default:
  56                 IntBarf(0x31, context);
  57         };
  58         return 1;
  59 }
  60
  61
  62 /*************************************************************************/
  63
  64
  65 HANDLE DPMI_GetNewSelector(WORD selcount)
  66 {
  67         LPSTR   ptr;
  68         HANDLE  pmSel;
  69         dprintf_int(stddeb,"DPMI_GetNewSelector(%d); !\n", selcount);
  70         pmSel = GlobalAlloc(GMEM_FIXED, 4096);
  71         ptr = GlobalLock(pmSel);
  72         dprintf_int(stddeb,"DPMI_GetNewSelector() return %04X !\n", pmSel);
  73         return pmSel;
  74 }
  75
  76
  77 BOOL DPMI_FreeSelector(HANDLE pmSel)
  78 {
  79         dprintf_int(stddeb,"DPMI_FreeSelector(%04X); !\n", pmSel);
  80         GlobalFree(pmSel);
  81         return 0;
  82 }
  83
  84 BOOL DPMI_SetDescriptor(HANDLE pmSel, LPDESCRIPTOR lpDesc)
  85 {
  86         dprintf_int(stdnimp,"DPMI_SetDescriptor(%04X, %p); !\n",
  87                 pmSel, lpDesc);
  88         dprintf_int(stdnimp,"DPMI lpDesc->Limit=%u \n", lpDesc->Limit);
  89         dprintf_int(stdnimp,"DPMI lpDesc->addr_lo=%04X \n", lpDesc->addr_lo);
  90         dprintf_int(stdnimp,"DPMI lpDesc->addr_hi=%02X \n", lpDesc->addr_hi);
  91         dprintf_int(stdnimp,"DPMI lpDesc->access.accessed=%u \n",
  92                 lpDesc->access.accessed);
  93         dprintf_int(stdnimp,"DPMI lpDesc->access.read_write=%u \n",
  94                 lpDesc->access.read_write);
  95         dprintf_int(stdnimp,"DPMI lpDesc->access.conf_exp=%u \n",
  96                 lpDesc->access.conf_exp);
  97         dprintf_int(stdnimp,"DPMI lpDesc->access.code=%u \n",
  98                 lpDesc->access.code);
  99         dprintf_int(stdnimp,"DPMI lpDesc->access.xsystem=%u \n",
 100                 lpDesc->access.xsystem);
 101         dprintf_int(stdnimp,"DPMI lpDesc->access.dpl=%u \n",
 102                 lpDesc->access.dpl);
 103         dprintf_int(stdnimp,"DPMI lpDesc->access.present=%u \n",
 104                 lpDesc->access.present);
 105         dprintf_int(stdnimp,"DPMI lpDesc->reserved=%04X \n", lpDesc->reserved);
 106         return FALSE;
 107 }
 108