1 /*
2 * Copyright (C) 2023 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "fault_handler.h"
18
19 #include <sys/ucontext.h>
20
21 #include "base/logging.h" // For VLOG.
22
23 extern "C" void art_quick_throw_stack_overflow();
24 extern "C" void art_quick_throw_null_pointer_exception_from_signal();
25 extern "C" void art_quick_implicit_suspend();
26
27 // RISCV64 specific fault handler functions (or stubs if unimplemented yet).
28
29 namespace art {
30
GetFaultPc(siginfo_t *,void * context)31 uintptr_t FaultManager::GetFaultPc(siginfo_t*, void* context) {
32 ucontext_t* uc = reinterpret_cast<ucontext_t*>(context);
33 mcontext_t* mc = reinterpret_cast<mcontext_t*>(&uc->uc_mcontext);
34 if (mc->__gregs[REG_SP] == 0) {
35 VLOG(signals) << "Missing SP";
36 return 0u;
37 }
38 return mc->__gregs[REG_PC];
39 }
40
GetFaultSp(void * context)41 uintptr_t FaultManager::GetFaultSp(void* context) {
42 ucontext_t* uc = reinterpret_cast<ucontext_t*>(context);
43 mcontext_t* mc = reinterpret_cast<mcontext_t*>(&uc->uc_mcontext);
44 return mc->__gregs[REG_SP];
45 }
46
Action(int,siginfo_t *,void *)47 bool NullPointerHandler::Action(int, siginfo_t*, void*) {
48 LOG(FATAL) << "NullPointerHandler::Action is not implemented for RISC-V";
49 return false;
50 }
51
Action(int,siginfo_t *,void *)52 bool SuspensionHandler::Action(int, siginfo_t*, void*) {
53 LOG(FATAL) << "SuspensionHandler::Action is not implemented for RISC-V";
54 return false;
55 }
56
Action(int,siginfo_t *,void *)57 bool StackOverflowHandler::Action(int, siginfo_t*, void*) {
58 LOG(FATAL) << "StackOverflowHandler::Action is not implemented for RISC-V";
59 return false;
60 }
61
62 } // namespace art
63