#pragma once

/*

 * Syscall Wrappers

 *

 * The linux syscalls are usually not directly accessible from applications,

 * since most standard libraries do not provide wrapper functions. This module

 * provides direct syscall wrappers via `syscall(3)' for a set of otherwise

 * unavailable syscalls.

 */

#include <stdlib.h>

#include <sys/resource.h>

#include <sys/syscall.h>

/**

 * syscall_memfd_create() - wrapper for memfd_create(2) syscall

 * @name:       name for memfd inode

 * @flags:      memfd flags

 *

 * This is a wrapper for the memfd_create(2) syscall. Currently, no user-space

 * wrapper is exported by any libc.

 *

 * Return: New memfd file-descriptor on success, -1 on failure.

 */

static inline int syscall_memfd_create(const char *name, unsigned int flags) {

        /* Make Travis happy. */

#if defined __NR_memfd_create

        long nr = __NR_memfd_create;

#elif defined __x86_64__

        long nr = 319;

#elif defined __i386__

        long nr = 356;

#else

#  error "__NR_memfd_create is undefined"

#endif

        return (int)syscall(nr, name, flags);

}

/**

 * syscall_pidfd_open() - wrapper for pidfd_open(2) syscall

 * @pid:        pid to open

 * @flags:      pidfd flags

 *

 * This is a wrapper for the pidfd_open(2) syscall. Only a very recent version

 * of glibc (2.36) exports a wrapper for this syscall, so we provide our own

 * for compatibility with other libc implementations.

 *

 * Return: New pidfd file-descriptor on success, -1 on failure.

 */

static inline int syscall_pidfd_open(pid_t pid, unsigned int flags) {

#if defined __NR_pidfd_open

        long nr = __NR_pidfd_open;

#elif defined(__x86_64__) || defined(__i386__) || defined(__aarch64__) || defined(__arm__)

        long nr = 434;

#else

#  error "__NR_pidfd_open is undefined"

#endif

        return (int)syscall(nr, pid, flags);

}