37 lines · cpp
1//===-- Implementation of sigsetjmp ---------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "src/setjmp/sigsetjmp.h"10#include "hdr/offsetof_macros.h"11#include "src/__support/common.h"12#include "src/__support/macros/config.h"13#include "src/setjmp/setjmp_impl.h"14#include "src/setjmp/sigsetjmp_epilogue.h"15 16namespace LIBC_NAMESPACE_DECL {17[[gnu::naked]]18LLVM_LIBC_FUNCTION(int, sigsetjmp, (sigjmp_buf, int)) {19 asm(R"(20 cbz w1, %c[setjmp]21 22 str x30, [x0, %c[retaddr]]23 str x19, [x0, %c[extra]]24 mov x19, x025 bl %c[setjmp]26 27 mov w1, w028 mov x0, x1929 ldr x30, [x0, %c[retaddr]]30 ldr x19, [x0, %c[extra]]31 b %c[epilogue])" ::[retaddr] "i"(offsetof(__jmp_buf, sig_retaddr)),32 [extra] "i"(offsetof(__jmp_buf, sig_extra)), [setjmp] "i"(setjmp),33 [epilogue] "i"(sigsetjmp_epilogue)34 : "x0", "x1", "x19", "x30");35}36} // namespace LIBC_NAMESPACE_DECL37