/*      $NetBSD: h_linux.h,v 1.2 2023/08/23 20:05:05 rillig Exp $       */

/*-
 * Copyright (c) 2023 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Theodore Preduta.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
#ifndef SRC_TESTS_COMPAT_LINUX_H_LINUX_H_
#define SRC_TESTS_COMPAT_LINUX_H_LINUX_H_

#include <sys/types.h>  /* For register_t. */

#define FAIL                    (-1)

#define syscall(number, ...)    syscall6(number, ## __VA_ARGS__, \
                                    0, 0, 0, 0, 0, 0)

#define RS(x)                   do { if ((x) == -1) exit(errno); } while (0)
#define REQUIRE(x)              do { if (!(x)) exit(FAIL); } while (0)

/* Convenience wrappers for common syscalls. */
#define close(fd)               (int)syscall(LINUX_SYS_close, fd)
#define exit(status)            (void)syscall(LINUX_SYS_exit_group, status)
#define fcntl(fd, cmd, ...)     (int)syscall(LINUX_SYS_fcntl, fd, cmd, \
                                    ## __VA_ARGS__)
#define lseek(fd, off, whence)  (off_t)syscall(LINUX_SYS_lseek, fd, \
                                    (register_t)off, whence)
#define mkdir(path, mode)       (int)syscall(LINUX_SYS_mkdir, \
                                    (register_t)path, mode)
#define open(path, flags, ...)  (int)syscall(LINUX_SYS_open, \
                                    (register_t)path, flags, \
                                    ## __VA_ARGS__)
#define read(fd, buf, count)    (ssize_t)syscall(LINUX_SYS_read, fd, \
                                    (register_t)buf, count)
#define rename(from, to)        (int)syscall(LINUX_SYS___posix_rename, \
                                    (register_t)from, (register_t)to)
#define rmdir(path)             (int)syscall(LINUX_SYS_rmdir, \
                                    (register_t)path)
#define unlink(path)            (int)syscall(LINUX_SYS_unlink, \
                                    (register_t)path)
#define write(fd, buf, count)   (ssize_t)syscall(LINUX_SYS_write, fd, \
                                    (register_t)buf, count)

/* GCC builtins. */
#define strcmp(s1, s2)          __builtin_strcmp(s1, s2)
#define strlen(s)               __builtin_strlen(s)

long    syscall6(long number, register_t, register_t, register_t, register_t,
            register_t, register_t, ...);

extern int errno;

#endif /* !SRC_TESTS_COMPAT_LINUX_H_LINUX_H_ */