lib/libc/arch/vax/SYS.h

   1 /*      $NetBSD: SYS.h,v 1.12 2012/02/27 12:26:21 joerg Exp $ */
   2 /*
   3  * Copyright (c) 1983, 1993
   4  *      The Regents of the University of California.  All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. Neither the name of the University nor the names of its contributors
  15  *    may be used to endorse or promote products derived from this software
  16  *    without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  *
  30  *      @(#)SYS.h       8.1 (Berkeley) 6/4/93
  31  */
  32
  33 #include <machine/asm.h>
  34 #include <sys/syscall.h>
  35
  36 #define CERROR  _C_LABEL(__cerror)
  37 #define CURBRK  _C_LABEL(__curbrk)
  38
  39 #ifdef __STDC__
  40 #define SYSTRAP(x)      chmk $ SYS_ ## x
  41 #else
  42 #define SYSTRAP(x)      chmk $ SYS_/**/x
  43 #endif
  44
  45 #define _SYSCALL_NOERROR(x,y)                                           \
  46         ENTRY(x,0);                                                     \
  47         SYSTRAP(y)
  48
  49 #define _SYSCALL(x,y)                                                   \
  50         .p2align 2;                                                     \
  51         err: nop; nop; jmp CERROR+2;                                    \
  52         _SYSCALL_NOERROR(x,y);                                          \
  53         jcs err+2
  54
  55 #define SYSCALL_NOERROR(x)                                              \
  56         _SYSCALL_NOERROR(x,x)
  57
  58 #define SYSCALL(x)                                                      \
  59         _SYSCALL(x,x)
  60
  61 #define PSEUDO_NOERROR(x,y)                                             \
  62         _SYSCALL_NOERROR(x,y);                                          \
  63         ret;                                                            \
  64         END(x)
  65
  66 #define PSEUDO(x,y)                                                     \
  67         _SYSCALL(x,y);                                                  \
  68         ret;                                                            \
  69         END(x)
  70
  71 #define RSYSCALL_NOERROR(x)                                             \
  72         PSEUDO_NOERROR(x,x)
  73
  74 #define RSYSCALL(x)                                                     \
  75         PSEUDO(x,x)
  76
  77 #ifdef WEAK_ALIAS
  78 #define WSYSCALL(weak,strong)                                           \
  79         WEAK_ALIAS(weak,strong);                                        \
  80         PSEUDO(strong,weak)
  81 #else
  82 #define WSYSCALL(weak,strong)                                           \
  83         PSEUDO(weak,weak)
  84 #endif
  85
  86 #define ASMSTR          .asciz
  87
  88         .protected      CERROR
  89         .globl  CERROR