lib/libc/arch/or1k/SYS.h

   1 /*      $NetBSD: SYS.h,v 1.2 2014/09/05 18:09:37 matt Exp $     */
   2
   3 /*-
   4  * Copyright (c) 2014 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Matt Thomas of 3am Software Foundry.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <machine/asm.h>
  33 #include <sys/syscall.h>
  34 #include "sysassym.h"
  35
  36 #define _DOSYSCALL(x)           l.addi  r13,r0,(SYS_ ## x)      ;\
  37                                 l.sys   0                       ;\
  38                                 l.nop
  39
  40 #define _SYSCALL_NOERROR(x,y)   ENTRY(x)                        ;\
  41                                 .if NSYSARGS_##y > 6            ;\
  42                                 l.lwz   r11, 0(r1)              ;\
  43                                 .endif                          ;\
  44                                 .if NSYSARGS_##y > 7            ;\
  45                                 l.lwz   r12, 4(r1)              ;\
  46                                 .endif                          ;\
  47                                 _DOSYSCALL(y)
  48
  49 #define _SYSCALL(x,y)           _SYSCALL_NOERROR(x,y)           ;\
  50                                 l.bf    _C_LABEL(__cerror)      ;\
  51                                 l.nop
  52
  53 #define SYSCALL_NOERROR(x)      _SYSCALL_NOERROR(x,x)
  54
  55 #define SYSCALL(x)              _SYSCALL(x,x)
  56
  57 #define PSEUDO_NOERROR(x,y)     _SYSCALL_NOERROR(x,y)           ;\
  58                                 l.jr    lr                      ;\
  59                                 l.nop                           ;\
  60                                 END(x)
  61
  62 #define PSEUDO(x,y)             _SYSCALL_NOERROR(x,y)           ;\
  63                                 l.bf    _C_LABEL(__cerror)      ;\
  64                                 l.nop                           ;\
  65                                 l.jr    lr                      ;\
  66                                 l.nop                           ;\
  67                                 END(x)
  68
  69 #define RSYSCALL_NOERROR(x)     PSEUDO_NOERROR(x,x)
  70
  71 #define RSYSCALL(x)             PSEUDO(x,x)
  72
  73 #define WSYSCALL(weak,strong)   WEAK_ALIAS(weak,strong)         ;\
  74                                 PSEUDO(strong,weak)