libc/src/signal/linux/__restore.cpp

   1 //===-- Linux implementation of __restore_rt ------------------------------===//
   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-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // This file is implemented separately from sigaction.cpp so that we can
  10 // strongly control the options this file is compiled with. __restore_rt cannot
  11 // make any stack allocations so we must ensure this.
  12
  13 #include "src/__support/OSUtil/syscall.h"
  14 #include "src/__support/macros/config.h"
  15
  16 #include <sys/syscall.h>
  17
  18 namespace LIBC_NAMESPACE_DECL {
  19
  20 extern "C" void __restore_rt()
  21     __attribute__((no_sanitize("all"),
  22                    hidden));
  23
  24 extern "C" void __restore_rt() {
  25   LIBC_NAMESPACE::syscall_impl<long>(SYS_rt_sigreturn);
  26 }
  27
  28 } // namespace LIBC_NAMESPACE_DECL