| /* |
| * Copyright (c) 2022 SAP SE. All rights reserved. |
| * Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| |
| #include "os_posix.hpp" |
| #include "runtime/os.hpp" |
| #include "runtime/safefetch.hpp" |
| #include "utilities/globalDefinitions.hpp" |
| |
| #ifdef SAFEFETCH_METHOD_STATIC_ASSEMBLY |
| |
| // SafeFetch handling, static assembly style: |
| // |
| // SafeFetch32 and SafeFetchN are implemented via static assembly |
| // and live in os_cpu/xx_xx/safefetch_xx_xx.S |
| |
| extern "C" char _SafeFetch32_continuation[] __attribute__ ((visibility ("hidden"))); |
| extern "C" char _SafeFetch32_fault[] __attribute__ ((visibility ("hidden"))); |
| |
| #ifdef _LP64 |
| extern "C" char _SafeFetchN_continuation[] __attribute__ ((visibility ("hidden"))); |
| extern "C" char _SafeFetchN_fault[] __attribute__ ((visibility ("hidden"))); |
| #endif // _LP64 |
| |
| bool handle_safefetch(int sig, address pc, void* context) { |
| ucontext_t* uc = (ucontext_t*)context; |
| if ((sig == SIGSEGV || sig == SIGBUS) && uc != nullptr) { |
| if (pc == (address)_SafeFetch32_fault) { |
| os::Posix::ucontext_set_pc(uc, (address)_SafeFetch32_continuation); |
| return true; |
| } |
| #ifdef _LP64 |
| if (pc == (address)_SafeFetchN_fault) { |
| os::Posix::ucontext_set_pc(uc, (address)_SafeFetchN_continuation); |
| return true; |
| } |
| #endif |
| } |
| return false; |
| } |
| |
| #endif // SAFEFETCH_METHOD_STATIC_ASSEMBLY |
