213 lines
6.2 KiB
C
213 lines
6.2 KiB
C
#include "config.h"
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#include <string.h>
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#include "winbase.h"
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#include "wine/windef16.h"
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#include "wine/winaspi.h"
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#include "debugtools.h"
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#include "miscemu.h" /* DOSMEM_* */
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#include "callback.h"
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#include "winerror.h"
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DEFAULT_DEBUG_CHANNEL(aspi);
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static HINSTANCE hWNASPI32 = INVALID_HANDLE_VALUE;
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static DWORD (__cdecl *pSendASPI32Command) (LPSRB) = NULL;
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static void
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DOSASPI_PostProc( SRB_ExecSCSICmd *lpPRB )
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{
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DWORD ptrSRB;
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LPSRB16 lpSRB16;
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memcpy(&ptrSRB,lpPRB->SenseArea + lpPRB->SRB_SenseLen,sizeof(DWORD));
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TRACE("Copying data back to DOS client at 0x%8lx\n",ptrSRB);
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lpSRB16 = DOSMEM_MapRealToLinear(ptrSRB);
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lpSRB16->cmd.SRB_TargStat = lpPRB->SRB_TargStat;
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lpSRB16->cmd.SRB_HaStat = lpPRB->SRB_HaStat;
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memcpy(lpSRB16->cmd.CDBByte + lpSRB16->cmd.SRB_CDBLen,lpPRB->SenseArea,lpSRB16->cmd.SRB_SenseLen);
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/* Now do posting */
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if( lpPRB->SRB_Status == SS_SECURITY_VIOLATION )
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{
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/* SS_SECURITY_VIOLATION isn't defined in DOS ASPI */
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TRACE("Returning SS_NO_DEVICE for SS_SECURITY_VIOLATION\n");
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lpPRB->SRB_Status = SS_NO_DEVICE;
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}
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lpSRB16->cmd.SRB_Status = lpPRB->SRB_Status;
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TRACE("SRB_Status = 0x%x\n", lpPRB->SRB_Status);
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HeapFree(GetProcessHeap(),0,lpPRB);
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if( (lpSRB16->cmd.SRB_Flags & SRB_POSTING) && lpSRB16->cmd.SRB_PostProc )
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{
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CONTEXT86 ctx;
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/* The stack should look like this on entry to proc
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* NOTE: the SDK draws the following diagram bass akwards, use this one
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* to avoid being confused. Remember, the act of pushing something on
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* an intel stack involves decreasing the stack pointer by the size of
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* the data, and then copying the data at the new SP.
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*/
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/***************************
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* ... Other crap that is already on the stack ...
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* Segment of SRB Pointer <- SP+6
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* Offset of SRB Pointer <- SP+4
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* Segment of return address <- SP+2
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* Offset of return address <- SP+0
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*/
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/* FIXME: I am about 99% sure what is here is correct,
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* but this code has never been tested (and probably
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* won't be either until someone finds a DOS program
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* that actually uses a Post Routine) */
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/* Zero everything */
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memset(&ctx, 0, sizeof(ctx));
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/* CS:IP is routine to call */
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ctx.SegCs = SELECTOROF(lpSRB16->cmd.SRB_PostProc);
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ctx.Eip = OFFSETOF(lpSRB16->cmd.SRB_PostProc);
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/* DPMI_CallRMProc will push the pointer to the stack
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* it is given (in this case &ptrSRB) with length
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* 2*sizeof(WORD), that is, it copies the the contents
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* of ptrSRB onto the stack, and decs sp by 2*sizeof(WORD).
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* After doing that, it pushes the return address
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* onto the stack (so we don't need to worry about that)
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* So the stack should be okay for the PostProc
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*/
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if(DPMI_CallRMProc(&ctx, (LPWORD)&ptrSRB, 2, FALSE))
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{
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TRACE("DPMI_CallRMProc returned nonzero (error) status\n");
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}
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} /* if ((SRB_Flags&SRB_POSTING) && SRB_PostProc) */
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}
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static
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DWORD ASPI_SendASPIDOSCommand(DWORD ptrSRB)
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{
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PSRB_ExecSCSICmd lpPRB;
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DWORD retval;
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union tagSRB16 * lpSRB16;
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lpSRB16 = DOSMEM_MapRealToLinear(ptrSRB);
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retval = SS_ERR;
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switch( lpSRB16->common.SRB_Cmd )
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{
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case SC_HA_INQUIRY:
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TRACE("SC_HA_INQUIRY\n");
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/* Format is identical in this case */
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retval = (*pSendASPI32Command)((LPSRB)lpSRB16);
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break;
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case SC_GET_DEV_TYPE:
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TRACE("SC_GET_DEV_TYPE\n");
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/* Format is identical in this case */
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retval = (*pSendASPI32Command)((LPSRB)lpSRB16);
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break;
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case SC_EXEC_SCSI_CMD:
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TRACE("SC_EXEC_SCSI_CMD\n");
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TRACE("Copying data from DOS client at 0x%8lx\n",ptrSRB);
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lpPRB = HeapAlloc(GetProcessHeap(),0,sizeof(SRB)+lpSRB16->cmd.SRB_SenseLen+sizeof(DWORD));
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#define srb_dos_to_w32(name) \
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lpPRB->SRB_##name = lpSRB16->cmd.SRB_##name
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srb_dos_to_w32(Cmd);
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srb_dos_to_w32(Status);
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srb_dos_to_w32(HaId);
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srb_dos_to_w32(BufLen);
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srb_dos_to_w32(SenseLen);
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srb_dos_to_w32(CDBLen);
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srb_dos_to_w32(Target);
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srb_dos_to_w32(Lun);
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#undef srb_dos_to_w32
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/* Allow certain flags to go on to WNASPI32, we also need
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* to make sure SRB_POSTING is enabled */
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lpPRB->SRB_Flags = SRB_POSTING | (lpSRB16->cmd.SRB_Flags&(SRB_DIR_IN|SRB_DIR_OUT|SRB_ENABLE_RESIDUAL_COUNT));
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/* Pointer to data buffer */
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lpPRB->SRB_BufPointer = DOSMEM_MapRealToLinear(lpSRB16->cmd.SRB_BufPointer);
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/* Copy CDB in */
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memcpy(&lpPRB->CDBByte[0],&lpSRB16->cmd.CDBByte[0],lpSRB16->cmd.SRB_CDBLen);
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/* Set post proc to our post proc */
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lpPRB->SRB_PostProc = &DOSASPI_PostProc;
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/* Stick the DWORD after all the sense info */
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memcpy(lpPRB->SenseArea + lpPRB->SRB_SenseLen,&ptrSRB,sizeof(DWORD));
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retval = (*pSendASPI32Command)((LPSRB)lpPRB);
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break;
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case SC_ABORT_SRB:
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TRACE("SC_ABORT_SRB\n");
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/* Would need some sort of table of active shit */
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break;
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case SC_RESET_DEV:
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TRACE("SC_RESET_DEV\n");
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break;
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default:
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TRACE("Unkown command code\n");
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break;
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}
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TRACE("Returning %lx\n", retval );
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return retval;
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}
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void WINAPI ASPI_DOS_func(CONTEXT86 *context)
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{
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WORD *stack = CTX_SEG_OFF_TO_LIN(context, context->SegSs, context->Esp);
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DWORD ptrSRB = *(DWORD *)&stack[2];
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ASPI_SendASPIDOSCommand(ptrSRB);
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/* simulate a normal RETF sequence as required by DPMI CallRMProcFar */
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context->Eip = *(stack++);
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context->SegCs = *(stack++);
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context->Esp += 2*sizeof(WORD);
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}
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/**********************************************************************
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* DOSVM_ASPIHandler (WINEDOS.@)
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*
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* returns the address of a real mode callback to ASPI_DOS_func()
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*/
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void WINAPI DOSVM_ASPIHandler( CONTEXT86 *context )
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{
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FARPROC16 *p = (FARPROC16 *)CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx);
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TRACE("DOS ASPI opening\n");
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if ((CX_reg(context) == 4) || (CX_reg(context) == 5))
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{
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if( hWNASPI32 == INVALID_HANDLE_VALUE )
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{
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TRACE("Loading WNASPI32\n");
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hWNASPI32 = LoadLibraryExA("WNASPI32", 0, 0);
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}
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if( hWNASPI32 == INVALID_HANDLE_VALUE )
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{
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ERR("Error loading WNASPI32\n");
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goto error_exit;
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}
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/* Get SendASPI32Command by Ordinal 2 */
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/* Cast to correct argument/return types */
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pSendASPI32Command = (DWORD (*)(LPSRB))GetProcAddress(hWNASPI32, (LPBYTE)2);
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if( !pSendASPI32Command )
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{
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ERR("Error getting ordinal 2 from WNASPI32\n");
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goto error_exit;
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}
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*p = DPMI_AllocInternalRMCB(ASPI_DOS_func);
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TRACE("allocated real mode proc %p\n", *p);
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AX_reg(context) = CX_reg(context);
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return;
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}
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error_exit:
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/* Return some error... General Failure sounds okay */
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AX_reg(context) = ERROR_GEN_FAILURE;
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SET_CFLAG(context);
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}
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