| /* |
| * DPMI 0.9 emulation |
| * |
| * Copyright 1995 Alexandre Julliard |
| */ |
| |
| #include <stdio.h> |
| #include <unistd.h> |
| #include <string.h> |
| #include "windows.h" |
| #include "heap.h" |
| #include "ldt.h" |
| #include "module.h" |
| #include "miscemu.h" |
| #include "stddebug.h" |
| /* #define DEBUG_INT */ |
| #include "debug.h" |
| |
| |
| /* Structure for real-mode callbacks */ |
| typedef struct |
| { |
| DWORD edi; |
| DWORD esi; |
| DWORD ebp; |
| DWORD reserved; |
| DWORD ebx; |
| DWORD edx; |
| DWORD ecx; |
| DWORD eax; |
| WORD flags; |
| WORD es; |
| WORD ds; |
| WORD fs; |
| WORD gs; |
| WORD ip; |
| WORD cs; |
| WORD sp; |
| WORD ss; |
| } REALMODECALL; |
| |
| extern void do_mscdex( SIGCONTEXT *context ); |
| |
| /********************************************************************** |
| * INT_Int31Handler |
| * |
| * Handler for int 31h (DPMI). |
| */ |
| void INT_Int31Handler( SIGCONTEXT *context ) |
| { |
| DWORD dw; |
| BYTE *ptr; |
| |
| RESET_CFLAG(context); |
| switch(AX_reg(context)) |
| { |
| case 0x0000: /* Allocate LDT descriptors */ |
| if (!(AX_reg(context) = AllocSelectorArray( CX_reg(context) ))) |
| { |
| AX_reg(context) = 0x8011; /* descriptor unavailable */ |
| SET_CFLAG(context); |
| } |
| break; |
| |
| case 0x0001: /* Free LDT descriptor */ |
| if (FreeSelector( BX_reg(context) )) |
| { |
| AX_reg(context) = 0x8022; /* invalid selector */ |
| SET_CFLAG(context); |
| } |
| else |
| { |
| /* If a segment register contains the selector being freed, */ |
| /* set it to zero. */ |
| if (!((DS_reg(context)^BX_reg(context)) & ~3)) DS_reg(context) = 0; |
| if (!((ES_reg(context)^BX_reg(context)) & ~3)) ES_reg(context) = 0; |
| #ifdef FS_reg |
| if (!((FS_reg(context)^BX_reg(context)) & ~3)) FS_reg(context) = 0; |
| #endif |
| #ifdef GS_reg |
| if (!((GS_reg(context)^BX_reg(context)) & ~3)) GS_reg(context) = 0; |
| #endif |
| } |
| break; |
| |
| case 0x0002: /* Real mode segment to descriptor */ |
| { |
| WORD entryPoint = 0; /* KERNEL entry point for descriptor */ |
| switch(BX_reg(context)) |
| { |
| case 0x0000: entryPoint = 183; break; /* __0000H */ |
| case 0x0040: entryPoint = 193; break; /* __0040H */ |
| case 0xa000: entryPoint = 174; break; /* __A000H */ |
| case 0xb000: entryPoint = 181; break; /* __B000H */ |
| case 0xb800: entryPoint = 182; break; /* __B800H */ |
| case 0xc000: entryPoint = 195; break; /* __C000H */ |
| case 0xd000: entryPoint = 179; break; /* __D000H */ |
| case 0xe000: entryPoint = 190; break; /* __E000H */ |
| case 0xf000: entryPoint = 194; break; /* __F000H */ |
| default: |
| AX_reg(context) = DOSMEM_AllocSelector(BX_reg(context)); |
| break; |
| } |
| if (entryPoint) |
| AX_reg(context) = LOWORD(MODULE_GetEntryPoint( |
| GetModuleHandle( "KERNEL" ), |
| entryPoint )); |
| } |
| break; |
| |
| case 0x0003: /* Get next selector increment */ |
| AX_reg(context) = __AHINCR; |
| break; |
| |
| case 0x0004: /* Lock selector (not supported) */ |
| AX_reg(context) = 0; /* FIXME: is this a correct return value? */ |
| break; |
| |
| case 0x0005: /* Unlock selector (not supported) */ |
| AX_reg(context) = 0; /* FIXME: is this a correct return value? */ |
| break; |
| |
| case 0x0006: /* Get selector base address */ |
| if (!(dw = GetSelectorBase( BX_reg(context) ))) |
| { |
| AX_reg(context) = 0x8022; /* invalid selector */ |
| SET_CFLAG(context); |
| } |
| else |
| { |
| CX_reg(context) = HIWORD(dw); |
| DX_reg(context) = LOWORD(dw); |
| } |
| break; |
| |
| case 0x0007: /* Set selector base address */ |
| SetSelectorBase( BX_reg(context), |
| MAKELONG( DX_reg(context), CX_reg(context) ) ); |
| break; |
| |
| case 0x0008: /* Set selector limit */ |
| SetSelectorLimit( BX_reg(context), |
| MAKELONG( DX_reg(context), CX_reg(context) ) ); |
| break; |
| |
| case 0x0009: /* Set selector access rights */ |
| SelectorAccessRights( BX_reg(context), 1, CX_reg(context) ); |
| break; |
| |
| case 0x000a: /* Allocate selector alias */ |
| if (!(AX_reg(context) = AllocCStoDSAlias( BX_reg(context) ))) |
| { |
| AX_reg(context) = 0x8011; /* descriptor unavailable */ |
| SET_CFLAG(context); |
| } |
| break; |
| |
| case 0x000b: /* Get descriptor */ |
| { |
| ldt_entry entry; |
| LDT_GetEntry( SELECTOR_TO_ENTRY( BX_reg(context) ), &entry ); |
| /* FIXME: should use ES:EDI for 32-bit clients */ |
| LDT_EntryToBytes( PTR_SEG_OFF_TO_LIN( ES_reg(context), |
| DI_reg(context) ), &entry ); |
| } |
| break; |
| |
| case 0x000c: /* Set descriptor */ |
| { |
| ldt_entry entry; |
| LDT_BytesToEntry( PTR_SEG_OFF_TO_LIN( ES_reg(context), |
| DI_reg(context) ), &entry ); |
| LDT_GetEntry( SELECTOR_TO_ENTRY( BX_reg(context) ), &entry ); |
| } |
| break; |
| |
| case 0x000d: /* Allocate specific LDT descriptor */ |
| AX_reg(context) = 0x8011; /* descriptor unavailable */ |
| SET_CFLAG(context); |
| break; |
| |
| case 0x0204: /* Get protected mode interrupt vector */ |
| dw = (DWORD)INT_GetHandler( BL_reg(context) ); |
| CX_reg(context) = HIWORD(dw); |
| DX_reg(context) = LOWORD(dw); |
| break; |
| |
| case 0x0205: /* Set protected mode interrupt vector */ |
| INT_SetHandler( BL_reg(context), |
| (FARPROC16)PTR_SEG_OFF_TO_SEGPTR( CX_reg(context), |
| DX_reg(context) )); |
| break; |
| |
| case 0x0300: /* Simulate real mode interrupt |
| * Interrupt number is in BL, flags are in BH |
| * ES:DI points to real-mode call structure |
| * Currently we just print it out and return error. |
| */ |
| { |
| REALMODECALL *p = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) ); |
| fprintf(stdnimp, |
| "RealModeInt %02x: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n" |
| " ESI=%08lx EDI=%08lx ES=%04x DS=%04x\n", |
| BL_reg(context), p->eax, p->ebx, p->ecx, p->edx, |
| p->esi, p->edi, p->es, p->ds ); |
| |
| /* Compton's 1995 encyclopedia does its MSCDEX calls through |
| * this interrupt. Why? Who knows... |
| */ |
| if ((BL_reg(context) == 0x2f) && ((p->eax & 0xFF00) == 0x1500)) |
| { |
| do_mscdex( context ); |
| break; |
| } |
| /* NETAPI.DLL of Win95 does AX=6506 to fetch a realmode ptr |
| * to the COLLATE table. |
| */ |
| if (BL_reg(context) == 0x21) { |
| switch ((p->eax & 0xFF00)>>8) { |
| case 0x65: |
| switch (p->eax & 0xFF) { |
| case 06:{/* get collate table */ |
| extern DWORD DOSMEM_CollateTable; |
| char *table; |
| /* ES:DI is a REALMODE pointer to 5 byte dosmem |
| * we fill that with 0x6, realmode pointer to collateTB |
| */ |
| table = DOSMEM_RealMode2Linear(MAKELONG(p->edi,p->es)); |
| *(BYTE*)table = 0x06; |
| *(DWORD*)(table+1) = DOSMEM_CollateTable; |
| |
| CX_reg(context) = 258;/*FIXME: size of table?*/ |
| break; |
| } |
| default: |
| SET_CFLAG(context); |
| } |
| default: |
| SET_CFLAG(context); |
| break; |
| } |
| break; |
| } |
| SET_CFLAG(context); |
| } |
| break; |
| |
| case 0x0301: /* Call real mode procedure with far return */ |
| { |
| REALMODECALL *p = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) ); |
| fprintf(stdnimp, |
| "RealModeCall: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n" |
| " ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x\n", |
| p->eax, p->ebx, p->ecx, p->edx, |
| p->esi, p->edi, p->es, p->ds, p->cs, p->ip ); |
| SET_CFLAG(context); |
| } |
| break; |
| |
| case 0x0302: /* Call real mode procedure with interrupt return */ |
| { |
| REALMODECALL *p = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) ); |
| fprintf(stdnimp, |
| "RealModeCallIret: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n" |
| " ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x\n", |
| p->eax, p->ebx, p->ecx, p->edx, |
| p->esi, p->edi, p->es, p->ds, p->cs, p->ip ); |
| SET_CFLAG(context); |
| } |
| break; |
| |
| case 0x0303: /* Allocate Real Mode Callback Address */ |
| { |
| REALMODECALL *p = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) ); |
| fprintf(stdnimp, |
| "AllocRMCB: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n" |
| " ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x\n", |
| p->eax, p->ebx, p->ecx, p->edx, |
| p->esi, p->edi, p->es, p->ds, p->cs, p->ip ); |
| SET_CFLAG(context); |
| } |
| break; |
| |
| case 0x0400: /* Get DPMI version */ |
| AX_reg(context) = 0x005a; /* DPMI version 0.90 */ |
| BX_reg(context) = 0x0005; /* Flags: 32-bit, virtual memory */ |
| CL_reg(context) = runtime_cpu (); |
| DX_reg(context) = 0x0102; /* Master/slave interrupt controller base*/ |
| break; |
| |
| case 0x0500: /* Get free memory information */ |
| ptr = (BYTE *)PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) ); |
| *(DWORD *)ptr = 0x00ff0000; /* Largest block available */ |
| memset( ptr + 4, 0xff, 0x2c ); /* No other information supported */ |
| break; |
| |
| case 0x0501: /* Allocate memory block */ |
| if (!(ptr = (BYTE *)HeapAlloc( SystemHeap, 0,MAKELONG( CX_reg(context), |
| BX_reg(context) )))) |
| { |
| AX_reg(context) = 0x8012; /* linear memory not available */ |
| SET_CFLAG(context); |
| } |
| else |
| { |
| BX_reg(context) = SI_reg(context) = HIWORD(ptr); |
| CX_reg(context) = DI_reg(context) = LOWORD(ptr); |
| } |
| break; |
| |
| case 0x0502: /* Free memory block */ |
| HeapFree( SystemHeap, 0, |
| (void *)MAKELONG( DI_reg(context), SI_reg(context) ) ); |
| break; |
| |
| case 0x0503: /* Resize memory block */ |
| if (!(ptr = (BYTE *)HeapReAlloc( SystemHeap, 0, |
| (void *)MAKELONG(DI_reg(context),SI_reg(context)), |
| MAKELONG(CX_reg(context),BX_reg(context))))) |
| { |
| AX_reg(context) = 0x8012; /* linear memory not available */ |
| SET_CFLAG(context); |
| } |
| else |
| { |
| BX_reg(context) = SI_reg(context) = HIWORD(ptr); |
| CX_reg(context) = DI_reg(context) = LOWORD(ptr); |
| } |
| break; |
| |
| case 0x0600: /* Lock linear region */ |
| break; /* Just ignore it */ |
| |
| case 0x0601: /* Unlock linear region */ |
| break; /* Just ignore it */ |
| |
| case 0x0602: /* Unlock real-mode region */ |
| break; /* Just ignore it */ |
| |
| case 0x0603: /* Lock real-mode region */ |
| break; /* Just ignore it */ |
| |
| case 0x0604: /* Get page size */ |
| BX_reg(context) = 0; |
| CX_reg(context) = 4096; |
| break; |
| |
| case 0x0702: /* Mark page as demand-paging candidate */ |
| break; /* Just ignore it */ |
| |
| case 0x0703: /* Discard page contents */ |
| break; /* Just ignore it */ |
| |
| default: |
| INT_BARF( context, 0x31 ); |
| AX_reg(context) = 0x8001; /* unsupported function */ |
| SET_CFLAG(context); |
| break; |
| } |
| } |
