static exception_t
handleInvocation(bool_t isCall, bool_t isBlocking)
{
message_info_t info;
cptr_t cptr;
lookupCapAndSlot_ret_t lu_ret;
word_t *buffer;
exception_t status;
word_t length;
tcb_t *thread;
thread = ksCurThread;
info = messageInfoFromWord(getRegister(thread, msgInfoRegister));
cptr = getRegister(thread, capRegister);
/* faulting section */
lu_ret = lookupCapAndSlot(thread, cptr);
if (unlikely(lu_ret.status != EXCEPTION_NONE)) {
userError("Invocation of invalid cap #%d.", (int)cptr);
current_fault = fault_cap_fault_new(cptr, false);
if (isBlocking) {
handleFault(thread);
}
return EXCEPTION_NONE;
}
buffer = lookupIPCBuffer(false, thread);
status = lookupExtraCaps(thread, buffer, info);
if (unlikely(status != EXCEPTION_NONE)) {
userError("Lookup of extra caps failed.");
if (isBlocking) {
handleFault(thread);
}
return EXCEPTION_NONE;
}
/* Syscall error/Preemptible section */
length = message_info_get_msgLength(info);
if (unlikely(length > n_msgRegisters && !buffer)) {
length = n_msgRegisters;
}
status = decodeInvocation(message_info_get_msgLabel(info), length,
cptr, lu_ret.slot, lu_ret.cap,
current_extra_caps, isBlocking, isCall,
buffer);
if (unlikely(status == EXCEPTION_PREEMPTED)) {
return status;
}
if (unlikely(status == EXCEPTION_SYSCALL_ERROR)) {
if (isCall) {
replyFromKernel_error(thread);
}
return EXCEPTION_NONE;
}
if (unlikely(
thread_state_get_tsType(thread->tcbState) == ThreadState_Restart)) {
if (isCall) {
replyFromKernel_success_empty(thread);
}
setThreadState(thread, ThreadState_Running);
}
return EXCEPTION_NONE;
}
static exception_t
handleInvocation(bool_t isCall, bool_t isBlocking)
{
seL4_MessageInfo_t info;
cptr_t cptr;
lookupCapAndSlot_ret_t lu_ret;
word_t *buffer;
exception_t status;
word_t length;
tcb_t *thread;
thread = ksCurThread;
info = messageInfoFromWord(getRegister(thread, msgInfoRegister));
cptr = getRegister(thread, capRegister);
/* faulting section */
lu_ret = lookupCapAndSlot(thread, cptr);
#if defined(DEBUG) || defined(CONFIG_BENCHMARK_TRACK_KERNEL_ENTRIES)
ksKernelEntry.cap_type = cap_get_capType(lu_ret.cap);
ksKernelEntry.invocation_tag = seL4_MessageInfo_get_label(info);
ksKernelEntry.is_fastpath = false;
#endif
if (unlikely(lu_ret.status != EXCEPTION_NONE)) {
userError("Invocation of invalid cap #%lu.", cptr);
current_fault = fault_cap_fault_new(cptr, false);
if (isBlocking) {
handleFault(thread);
}
return EXCEPTION_NONE;
}
buffer = lookupIPCBuffer(false, thread);
status = lookupExtraCaps(thread, buffer, info);
if (unlikely(status != EXCEPTION_NONE)) {
userError("Lookup of extra caps failed.");
if (isBlocking) {
handleFault(thread);
}
return EXCEPTION_NONE;
}
/* Syscall error/Preemptible section */
length = seL4_MessageInfo_get_length(info);
if (unlikely(length > n_msgRegisters && !buffer)) {
length = n_msgRegisters;
}
status = decodeInvocation(seL4_MessageInfo_get_label(info), length,
cptr, lu_ret.slot, lu_ret.cap,
current_extra_caps, isBlocking, isCall,
buffer);
if (unlikely(status == EXCEPTION_PREEMPTED)) {
return status;
}
if (unlikely(status == EXCEPTION_SYSCALL_ERROR)) {
if (isCall) {
replyFromKernel_error(thread);
}
return EXCEPTION_NONE;
}
if (unlikely(
thread_state_get_tsType(thread->tcbState) == ThreadState_Restart)) {
if (isCall) {
replyFromKernel_success_empty(thread);
}
setThreadState(thread, ThreadState_Running);
}
return EXCEPTION_NONE;
}
