lib/libc/arch/m68k/SYS.h

   1 /*      $NetBSD: SYS.h,v 1.15 2002/05/26 12:24:57 wiz Exp $     */
   2
   3 /*-
   4  * Copyright (c) 1990 The Regents of the University of California.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * the Systems Programming Group of the University of Utah Computer
   9  * Science Department.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  *      from: @(#)SYS.h 5.5 (Berkeley) 5/7/91
  36  */
  37
  38 #include <sys/syscall.h>
  39 #include <machine/asm.h>
  40
  41 #ifdef __STDC__
  42 #define IMMEDIATE       #
  43 #define SYSTRAP(x)      movl IMMEDIATE SYS_ ## x ## ,%d0; trap IMMEDIATE 0
  44 #else
  45 #define SYSTRAP(x)      movl #SYS_/**/x,%d0; trap #0
  46 #endif
  47
  48 #ifdef __ELF__
  49 #define CERROR          _C_LABEL(__cerror)
  50 #define CURBRK          _C_LABEL(__curbrk)
  51 #else
  52 #define CERROR          _ASM_LABEL(cerror)
  53 #define CURBRK          _ASM_LABEL(curbrk)
  54 #endif
  55
  56 #define _SYSCALL_NOERROR(x,y)                                           \
  57         ENTRY(x);                                                       \
  58         SYSTRAP(y)
  59
  60 #define _SYSCALL(x,y)                                                   \
  61         .even;                                                          \
  62         err: jra PIC_PLT(CERROR);                                       \
  63         _SYSCALL_NOERROR(x,y);                                          \
  64         jcs err
  65
  66 #define SYSCALL_NOERROR(x)                                              \
  67         _SYSCALL_NOERROR(x,x)
  68
  69 #define SYSCALL(x)                                                      \
  70         _SYSCALL(x,x)
  71
  72 #define PSEUDO_NOERROR(x,y)                                             \
  73         _SYSCALL_NOERROR(x,y);                                          \
  74         rts
  75
  76 #define PSEUDO(x,y)                                                     \
  77         _SYSCALL(x,y);                                                  \
  78         rts
  79
  80 #define RSYSCALL_NOERROR(x)                                             \
  81         PSEUDO_NOERROR(x,x)
  82
  83 #define RSYSCALL(x)                                                     \
  84         PSEUDO(x,x)
  85
  86 #ifdef WEAK_ALIAS
  87 #define WSYSCALL(weak,strong)                                           \
  88         WEAK_ALIAS(weak,strong);                                        \
  89         PSEUDO(strong,weak)
  90 #else
  91 #define WSYSCALL(weak,strong)                                           \
  92         PSEUDO(weak,weak)
  93 #endif
  94
  95 #define ASMSTR          .asciz
  96
  97         .globl  CERROR