lib/libc/arch/alpha/SYS.h

   1 /* $NetBSD: SYS.h,v 1.8 2002/01/14 00:55:55 thorpej Exp $ */
   2
   3 /*
   4  * Copyright (c) 1994, 1995 Carnegie-Mellon University.
   5  * All rights reserved.
   6  *
   7  * Author: Chris G. Demetriou
   8  *
   9  * Permission to use, copy, modify and distribute this software and
  10  * its documentation is hereby granted, provided that both the copyright
  11  * notice and this permission notice appear in all copies of the
  12  * software, derivative works or modified versions, and any portions
  13  * thereof, and that both notices appear in supporting documentation.
  14  *
  15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
  17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  18  *
  19  * Carnegie Mellon requests users of this software to return to
  20  *
  21  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  22  *  School of Computer Science
  23  *  Carnegie Mellon University
  24  *  Pittsburgh PA 15213-3890
  25  *
  26  * any improvements or extensions that they make and grant Carnegie the
  27  * rights to redistribute these changes.
  28  */
  29
  30 #include <machine/asm.h>
  31 #include <sys/syscall.h>
  32
  33
  34 #define CALLSYS_ERROR(name)                                     \
  35         CALLSYS_NOERROR(name);                                  \
  36         br      gp, LLABEL(name,0);                             \
  37 LLABEL(name,0):                                                 \
  38         LDGP(gp);                                               \
  39         beq     a3, LLABEL(name,1);                             \
  40         jmp     zero, __cerror;                                 \
  41 LLABEL(name,1):
  42
  43
  44 #define SYSCALL(name)                                           \
  45 LEAF(name,0);                           /* XXX # of args? */    \
  46         CALLSYS_ERROR(name)
  47
  48 #define SYSCALL_NOERROR(name)                                   \
  49 LEAF(name,0);                           /* XXX # of args? */    \
  50         CALLSYS_NOERROR(name)
  51
  52 #define PSEUDO(label,name)                                      \
  53 LEAF(label,0);                          /* XXX # of args? */    \
  54         CALLSYS_ERROR(name);                                    \
  55         RET;                                                    \
  56 END(label);
  57
  58 #define PSEUDO_NOERROR(label,name)                              \
  59 LEAF(label,0);                          /* XXX # of args? */    \
  60         CALLSYS_NOERROR(name);                                  \
  61         RET;                                                    \
  62 END(label);
  63
  64 #define RSYSCALL(name)                                          \
  65         SYSCALL(name);                                          \
  66         RET;                                                    \
  67 END(name)
  68
  69 #define RSYSCALL_NOERROR(name)                                  \
  70         SYSCALL_NOERROR(name);                                  \
  71         RET;                                                    \
  72 END(name)
  73
  74 #define WSYSCALL(weak,strong)                                   \
  75         WEAK_ALIAS(weak,strong);                                \
  76         PSEUDO(strong,weak)