1 //===-- Implementation of the pthread_attr_setstack -----------------===//
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 #include "pthread_attr_setstack.h"
10 
11 #include "src/__support/common.h"
12 
13 #include <errno.h>
14 #include <linux/param.h> // For EXEC_PAGESIZE.
15 #include <pthread.h>
16 #include <stdint.h>
17 
18 namespace __llvm_libc {
19 
20 LLVM_LIBC_FUNCTION(int, pthread_attr_setstack,
21                    (pthread_attr_t *__restrict attr, void *stack,
22                     size_t stacksize)) {
23   if (stacksize < PTHREAD_STACK_MIN)
24     return EINVAL;
25   uintptr_t stackaddr = reinterpret_cast<uintptr_t>(stack);
26   if ((stackaddr % 16 != 0) || ((stackaddr + stacksize) % 16 != 0))
27     return EINVAL;
28   attr->__stack = stack;
29   attr->__stacksize = stacksize;
30   return 0;
31 }
32 
33 } // namespace __llvm_libc
34