/**
* Deal with traps occurring during segment loading and IRET when resuming guest
* context execution.
*
* @returns VBox status code.
* @param pVM Pointer to the VM.
* @param pRegFrame The register frame.
* @param uUser User argument. In this case a combination of the
* CPUM_HANDLER_* \#defines.
*/
DECLCALLBACK(int) cpumRCHandleNPAndGP(PVM pVM, PCPUMCTXCORE pRegFrame, uintptr_t uUser)
{
Log(("********************************************************\n"));
Log(("cpumRCHandleNPAndGP: eip=%RX32 uUser=%#x\n", pRegFrame->eip, uUser));
Log(("********************************************************\n"));
/*
* Take action based on what's happened.
*/
switch (uUser & CPUM_HANDLER_TYPEMASK)
{
case CPUM_HANDLER_GS:
case CPUM_HANDLER_DS:
case CPUM_HANDLER_ES:
case CPUM_HANDLER_FS:
TRPMGCHyperReturnToHost(pVM, VINF_EM_RAW_STALE_SELECTOR);
break;
case CPUM_HANDLER_IRET:
TRPMGCHyperReturnToHost(pVM, VINF_EM_RAW_IRET_TRAP);
break;
}
AssertMsgFailed(("uUser=%#x eip=%#x\n", uUser, pRegFrame->eip));
return VERR_TRPM_DONT_PANIC;
}
/**
* Deal with hypervisor traps occurring when resuming execution on a trap.
*
* There is a little problem with recursive RC (hypervisor) traps. We deal with
* this by not allowing recursion without it being the subject of a guru
* meditation. (We used to / tried to handle this but there isn't any reason
* for it.)
*
* So, do NOT use this for handling RC traps!
*
* @returns VBox status code. (Anything but VINF_SUCCESS will cause guru.)
* @param pVM Pointer to the VM.
* @param pRegFrame Register frame.
* @param uUser User arg.
*/
DECLCALLBACK(int) trpmRCTrapInGeneric(PVM pVM, PCPUMCTXCORE pRegFrame, uintptr_t uUser)
{
Log(("********************************************************\n"));
Log(("trpmRCTrapInGeneric: eip=%RX32 uUser=%#x\n", pRegFrame->eip, uUser));
Log(("********************************************************\n"));
/*
* This used to be kind of complicated, but since we stopped storing
* the register frame on the stack and instead storing it directly
* in the CPUMCPU::Guest structure, we just have to figure out which
* status to hand on to the host and let the recompiler/IEM do its
* job.
*/
switch (uUser)
{
case TRPM_TRAP_IN_MOV_GS:
case TRPM_TRAP_IN_MOV_FS:
case TRPM_TRAP_IN_MOV_ES:
case TRPM_TRAP_IN_MOV_DS:
TRPMGCHyperReturnToHost(pVM, VINF_EM_RAW_STALE_SELECTOR);
break;
case TRPM_TRAP_IN_IRET:
case TRPM_TRAP_IN_IRET | TRPM_TRAP_IN_V86:
TRPMGCHyperReturnToHost(pVM, VINF_EM_RAW_IRET_TRAP);
break;
default:
AssertMsgFailed(("Invalid uUser=%#x\n", uUser));
return VERR_TRPM_BAD_TRAP_IN_OP;
}
AssertMsgFailed(("Impossible!\n"));
return VERR_TRPM_IPE_3;
}
