1/** 2 * Copyright (c) 2021-2022 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16.extern StackOverflowExceptionEntrypoint 17 18// This trampoline is needed because x86 push LR when executing a call instruction, but `rt_sigreturn` syscall just 19// jumps to the given pc, thus, SP become unaligned. 20// This trampoline solves this problem by just invoking the entrypoint via regular call. 21.global StackOverflowExceptionEntrypointTrampoline 22.type StackOverflowExceptionEntrypointTrampoline, %function 23StackOverflowExceptionEntrypointTrampoline: 24 callq StackOverflowExceptionEntrypoint@plt 25