lib/libc/arm/SYS.h

   1 /*      $NetBSD: SYS.h,v 1.8 2003/08/07 16:42:02 agc 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  * William Jolitz.
   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  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *      from: @(#)SYS.h 5.5 (Berkeley) 5/7/91
  35  * $FreeBSD$
  36  */
  37
  38 #include <machine/asm.h>
  39 #include <sys/syscall.h>
  40 #include <machine/swi.h>
  41
  42 #define SYSTRAP(x)                                                      \
  43                         mov ip, r7;                                     \
  44                         ldr r7, =SYS_ ## x;                             \
  45                         swi 0;                                          \
  46                         mov r7, ip
  47
  48 #define CERROR          _C_LABEL(cerror)
  49 #define CURBRK          _C_LABEL(curbrk)
  50
  51 #define _SYSCALL_NOERROR(x)                                             \
  52         ENTRY(__CONCAT(__sys_, x));                                     \
  53         .weak _C_LABEL(x);                                              \
  54         .set _C_LABEL(x), _C_LABEL(__CONCAT(__sys_,x));                 \
  55         .weak _C_LABEL(__CONCAT(_,x));                                  \
  56         .set _C_LABEL(__CONCAT(_,x)),_C_LABEL(__CONCAT(__sys_,x));      \
  57         SYSTRAP(x)
  58
  59 #define _SYSCALL(x)                                                     \
  60         _SYSCALL_NOERROR(x);                                            \
  61         it      cs;                                                     \
  62         bcs PIC_SYM(CERROR, PLT)
  63
  64 #define SYSCALL(x)                                                      \
  65         _SYSCALL(x)
  66
  67 #define PSEUDO(x)                                                       \
  68         ENTRY(__CONCAT(__sys_, x));                                     \
  69         .weak _C_LABEL(__CONCAT(_,x));                                  \
  70         .set _C_LABEL(__CONCAT(_,x)),_C_LABEL(__CONCAT(__sys_,x));      \
  71         SYSTRAP(x);                                                     \
  72         it      cs;                                                     \
  73         bcs PIC_SYM(CERROR, PLT);                                       \
  74         RET
  75
  76 #define RSYSCALL(x)                                                     \
  77         _SYSCALL(x);                                                    \
  78         RET
  79
  80         .globl  CERROR