/*      $OpenBSD: SYS.h,v 1.7 2023/12/10 16:45:50 deraadt Exp $ */
/*      $NetBSD: SYS.h,v 1.8 2003/08/07 16:42:02 agc Exp $      */

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * William Jolitz.
 *
 * 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.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
 *
 *      from: @(#)SYS.h 5.5 (Berkeley) 5/7/91
 */

#include "DEFS.h"
#include <sys/syscall.h>

#define SYSENTRY(x)                                     \
        .weak x;                                        \
        x = _thread_sys_ ## x;                          \
        ENTRY(_thread_sys_ ## x)
#define SYSENTRY_HIDDEN(x)                              \
        ENTRY(_thread_sys_ ## x)
#define __END_HIDDEN(x)                                 \
        END(_thread_sys_ ## x);                         \
        _HIDDEN_FALIAS(x, _thread_sys_ ## x);           \
        END(_HIDDEN(x))
#define __END(x)                                        \
        __END_HIDDEN(x); END(x)

#define SYSTRAP(x) \
        ldr     x8, =SYS_ ## x;         \
97:     svc     0;                      \
        PINSYSCALL(SYS_ ## x, 97b);     \
        dsb     nsh;                    \
        isb

#define CERROR          __cerror

#define _SYSCALL_NOERROR(x,y)                                           \
        SYSENTRY(x);                                                    \
        SYSTRAP(y)
#define _SYSCALL_HIDDEN_NOERROR(x,y)                                    \
        SYSENTRY_HIDDEN(x);                                             \
        SYSTRAP(y)

#define _SYSCALL(x, y)                                                  \
        _SYSCALL_NOERROR(x,y);                                          \
        bcs CERROR
#define _SYSCALL_HIDDEN(x, y)                                           \
        _SYSCALL_HIDDEN_NOERROR(x,y);                                   \
        bcs CERROR

#define SYSCALL_NOERROR(x)                                              \
        _SYSCALL_NOERROR(x,x)

#define SYSCALL(x)                                                      \
        _SYSCALL(x,x)


#define PSEUDO_NOERROR(x,y)                                             \
        SYSENTRY(x);                                                    \
        RETGUARD_SETUP(x, x15);                                         \
        SYSTRAP(y);                                                     \
        RETGUARD_CHECK(x, x15);                                         \
        ret;                                                            \
        __END(x)

#define PSEUDO(x,y)                                                     \
        SYSENTRY(x);                                                    \
        RETGUARD_SETUP(x, x15);                                         \
        SYSTRAP(y);                                                     \
        bcs CERROR;                                                     \
        RETGUARD_CHECK(x, x15);                                         \
        ret;                                                            \
        __END(x)
#define PSEUDO_HIDDEN(x,y)                                              \
        SYSENTRY_HIDDEN(x);                                             \
        RETGUARD_SETUP(x, x15);                                         \
        SYSTRAP(y);                                                     \
        bcs CERROR;                                                     \
        RETGUARD_CHECK(x, x15);                                         \
        ret;                                                            \
        __END_HIDDEN(x)

#define RSYSCALL_NOERROR(x)                                             \
        PSEUDO_NOERROR(x,x)

#define RSYSCALL(x)                                                     \
        PSEUDO(x,x)
#define RSYSCALL_HIDDEN(x)                                              \
        PSEUDO_HIDDEN(x,x)
#define SYSCALL_END(x)                                                  \
        __END(x)
#define SYSCALL_END_HIDDEN(x)                                           \
        __END_HIDDEN(x)

        .globl  CERROR