mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-12 14:20:13 +00:00
50 lines
1.6 KiB
C
50 lines
1.6 KiB
C
/* Auxiliary functions to issue the clone syscall.
|
|
Copyright (C) 2021 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#ifdef __linux__
|
|
# include <support/check.h>
|
|
# include <stackinfo.h> /* For _STACK_GROWS_{UP,DOWN}. */
|
|
# include <xsched.h>
|
|
|
|
pid_t
|
|
xclone (int (*fn) (void *arg), void *arg, void *stack, size_t stack_size,
|
|
int flags)
|
|
{
|
|
pid_t r = -1;
|
|
|
|
# ifdef __ia64__
|
|
extern int __clone2 (int (*fn) (void *arg), void *stack, size_t stack_size,
|
|
int flags, void *arg, ...);
|
|
r = __clone2 (fn, stack, stack_size, flags, arg, /* ptid */ NULL,
|
|
/* tls */ NULL, /* ctid */ NULL);
|
|
# else
|
|
# if _STACK_GROWS_DOWN
|
|
r = clone (fn, stack + stack_size, flags, arg, /* ptid */ NULL,
|
|
/* tls */ NULL, /* ctid */ NULL);
|
|
# elif _STACK_GROWS_UP
|
|
r = clone (fn, stack, flags, arg, /* ptid */ NULL, /* tls */ NULL, NULL);
|
|
# endif
|
|
# endif
|
|
|
|
if (r < 0)
|
|
FAIL_EXIT1 ("clone: %m");
|
|
|
|
return r;
|
|
}
|
|
#endif
|