/*      $OpenBSD: SYS.h,v 1.6 2023/12/11 22:29:24 deraadt Exp $ */

/*
 * Copyright (c) 2013 Miodrag Vallat.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
/*
 * Copyright (c) 2006 Dale Rahn
 *
 * 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 AUTHOR ``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 AUTHOR 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.
 *
 */

#include <machine/asm.h>
#include <sys/syscall.h>

#define PINSYSCALL(sysno, label)                                \
        .pushsection .openbsd.syscalls,"",@progbits             ;\
        .p2align 2                                              ;\
        .long label                                             ;\
        .long sysno                                             ;\
        .popsection

#define __CONCAT(p,x)           p##x
#define __ENTRY(p,x)            ENTRY(__CONCAT(p,x))
#define __SYSCALLNAME(p,x)      __CONCAT(p,x)

#define __DO_SYSCALL(x)                                         \
        or %r13, %r0, __SYSCALLNAME(SYS_,x)                     ;\
99:     tb0 0, %r0, 450                                         ;\
        PINSYSCALL(__SYSCALLNAME(SYS_,x), 99b)

/*
 * m88k syscall return ABI requires the same amount of ASM
 * whether or not the syscall can possibly fail, so there's
 * no benefit to a DL_SYSCALL_NOERR() macro.
 */
#define DL_SYSCALL(n)                                           \
        __ENTRY(_dl_,n)                                         ;\
        __DO_SYSCALL(n)                                         ;\
        subu    %r2, %r0, %r2   /* return -errno; */            ;\
        jmp     %r1                                             ;\
        END(_dl_##n)