/**
* Remove MMGCRam Hypervisor page fault handler.
* See description of MMGCRamRegisterTrapHandler call.
*
* @param pVM Pointer to the VM.
*/
VMMRCDECL(void) MMGCRamDeregisterTrapHandler(PVM pVM)
{
TRPMGCSetTempHandler(pVM, 0xe, NULL);
}
/**
* Execute the trap testcase.
*
* There is some common code here, that's why we're collecting them
* like this. Odd numbered variation (uArg) are executed with write
* protection (WP) enabled.
*
* @returns VINF_SUCCESS if it was a testcase setup up to continue and did so successfully.
* @returns VERR_NOT_IMPLEMENTED if the testcase wasn't implemented.
* @returns VERR_GENERAL_FAILURE if the testcase continued when it shouldn't.
*
* @param pVM The VM handle.
* @param uOperation The testcase.
* @param uArg The variation. See function description for odd / even details.
*
* @remark Careful with the trap 08 testcase and WP, it will triple
* fault the box if the TSS, the Trap8 TSS and the fault TSS
* GDTE are in pages which are read-only.
* See bottom of SELMR3Init().
*/
static int vmmGCTest(PVM pVM, unsigned uOperation, unsigned uArg)
{
/*
* Set up the testcase.
*/
#if 0
switch (uOperation)
{
default:
break;
}
#endif
/*
* Enable WP if odd variation.
*/
if (uArg & 1)
vmmGCEnableWP();
/*
* Execute the testcase.
*/
int rc = VERR_NOT_IMPLEMENTED;
switch (uOperation)
{
//case VMMGC_DO_TESTCASE_TRAP_0:
//case VMMGC_DO_TESTCASE_TRAP_1:
//case VMMGC_DO_TESTCASE_TRAP_2:
case VMMGC_DO_TESTCASE_TRAP_3:
{
if (uArg <= 1)
rc = vmmGCTestTrap3();
break;
}
//case VMMGC_DO_TESTCASE_TRAP_4:
//case VMMGC_DO_TESTCASE_TRAP_5:
//case VMMGC_DO_TESTCASE_TRAP_6:
//case VMMGC_DO_TESTCASE_TRAP_7:
case VMMGC_DO_TESTCASE_TRAP_8:
{
#ifndef DEBUG_bird /** @todo dynamic check that this won't triple fault... */
if (uArg & 1)
break;
#endif
if (uArg <= 1)
rc = vmmGCTestTrap8();
break;
}
//VMMGC_DO_TESTCASE_TRAP_9,
//VMMGC_DO_TESTCASE_TRAP_0A,
//VMMGC_DO_TESTCASE_TRAP_0B,
//VMMGC_DO_TESTCASE_TRAP_0C,
case VMMGC_DO_TESTCASE_TRAP_0D:
{
if (uArg <= 1)
rc = vmmGCTestTrap0d();
break;
}
case VMMGC_DO_TESTCASE_TRAP_0E:
{
if (uArg <= 1)
rc = vmmGCTestTrap0e();
else if (uArg == 2 || uArg == 4)
{
/*
* Test the use of a temporary #PF handler.
*/
rc = TRPMGCSetTempHandler(pVM, X86_XCPT_PF, uArg != 4 ? vmmGCTestTmpPFHandler : vmmGCTestTmpPFHandlerCorruptFS);
if (RT_SUCCESS(rc))
{
rc = vmmGCTestTrap0e();
/* in case it didn't fire. */
int rc2 = TRPMGCSetTempHandler(pVM, X86_XCPT_PF, NULL);
if (RT_FAILURE(rc2) && RT_SUCCESS(rc))
rc = rc2;
}
}
break;
}
}
/*
* Re-enable WP.
*/
if (uArg & 1)
vmmGCDisableWP();
return rc;
}
/**
* Install MMGCRam Hypervisor page fault handler for normal working
* of MMGCRamRead and MMGCRamWrite calls.
* This handler will be automatically removed at page fault.
* In other case it must be removed by MMGCRamDeregisterTrapHandler call.
*
* @param pVM Pointer to the VM.
*/
VMMRCDECL(void) MMGCRamRegisterTrapHandler(PVM pVM)
{
TRPMGCSetTempHandler(pVM, 0xe, mmGCRamTrap0eHandler);
}
