lib/libc/alpha/SYS.h

   1 /*      From: NetBSD: SYS.h,v 1.5 1997/05/02 18:15:15 kleink 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  * $FreeBSD$
  30  */
  31
  32 #include <machine/asm.h>
  33 #include <sys/syscall.h>
  34
  35 #define CALLSYS_ERROR(name)                                     \
  36         CALLSYS_NOERROR(name);                                  \
  37         br      gp, LLABEL(name,0);                             \
  38 LLABEL(name,0):                                                 \
  39         LDGP(gp);                                               \
  40         beq     a3, LLABEL(name,1);                             \
  41         jmp     zero, .cerror;                                  \
  42 LLABEL(name,1):
  43
  44
  45 #define SYSCALL(name)                                           \
  46 LEAF(__CONCAT(__sys_,name),0);          /* XXX # of args? */    \
  47         WEAK_ALIAS(name, __CONCAT(__sys_,name));                \
  48         WEAK_ALIAS(__CONCAT(_,name), __CONCAT(__sys_,name));    \
  49         CALLSYS_ERROR(name)
  50
  51 #define SYSCALL_NOERROR(name)                                   \
  52 LEAF(__CONCAT(__sys_,name),0);          /* XXX # of args? */    \
  53         WEAK_ALIAS(name, __CONCAT(__sys_,name));                \
  54         WEAK_ALIAS(__CONCAT(_,name), __CONCAT(__sys_,name));    \
  55         CALLSYS_NOERROR(name)
  56
  57
  58 #define RSYSCALL(name)                                          \
  59         SYSCALL(name);                                          \
  60         RET;                                                    \
  61 END(__CONCAT(__sys_,name))
  62
  63 #define RSYSCALL_NOERROR(name)                                  \
  64         SYSCALL_NOERROR(name);                                  \
  65         RET;                                                    \
  66 END(__CONCAT(__sys_,name))
  67
  68
  69 #define PSEUDO(name)                                            \
  70 LEAF(__CONCAT(__sys_,name),0);          /* XXX # of args? */    \
  71         WEAK_ALIAS(__CONCAT(_,name), __CONCAT(__sys_, name));   \
  72         CALLSYS_ERROR(name);                                    \
  73         RET;                                                    \
  74 END(__CONCAT(__sys_,name))