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//===-- Linux implementation of syscall -----------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "src/unistd/syscall.h"
#include "src/__support/OSUtil/syscall.h" // For internal syscall function.
#include "src/__support/common.h"
#include "src/errno/libc_errno.h"
#include <stdarg.h>
namespace LIBC_NAMESPACE {
LLVM_LIBC_FUNCTION(long, LIBC_NAMESPACE_syscall,
(long number, long arg1, long arg2, long arg3, long arg4,
long arg5, long arg6)) {
long ret = LIBC_NAMESPACE::syscall_impl<long>(number, arg1, arg2, arg3, arg4,
arg5, arg6);
// Syscalls may return large positive values that overflow, but will never
// return values between -4096 and -1
if (static_cast<unsigned long>(ret) > -4096UL) {
libc_errno = static_cast<int>(-ret);
return -1;
}
return ret;
}
} // namespace LIBC_NAMESPACE
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