lib/libc/arm/SYS.h

   1 /*      $NetBSD: SYS.h,v 1.8 2003/08/07 16:42:02 agc Exp $      */
   2
   3 /*-
   4  * SPDX-License-Identifier: BSD-3-Clause
   5  *
   6  * Copyright (c) 1990 The Regents of the University of California.
   7  * All rights reserved.
   8  *
   9  * This code is derived from software contributed to Berkeley by
  10  * William Jolitz.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  * 3. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  *      from: @(#)SYS.h 5.5 (Berkeley) 5/7/91
  37  * $FreeBSD$
  38  */
  39
  40 #include <machine/asm.h>
  41 #include <sys/syscall.h>
  42
  43 #define SYSTRAP(x)                                                      \
  44                         mov ip, r7;                                     \
  45                         ldr r7, =SYS_ ## x;                             \
  46                         swi 0;                                          \
  47                         mov r7, ip
  48
  49 #define CERROR          _C_LABEL(cerror)
  50 #define CURBRK          _C_LABEL(curbrk)
  51
  52 #define _SYSCALL_NOERROR(x)                                             \
  53         ENTRY(__CONCAT(__sys_, x));                                     \
  54         .weak _C_LABEL(x);                                              \
  55         .set _C_LABEL(x), _C_LABEL(__CONCAT(__sys_,x));                 \
  56         .weak _C_LABEL(__CONCAT(_,x));                                  \
  57         .set _C_LABEL(__CONCAT(_,x)),_C_LABEL(__CONCAT(__sys_,x));      \
  58         SYSTRAP(x)
  59
  60 #define _SYSCALL(x)                                                     \
  61         _SYSCALL_NOERROR(x);                                            \
  62         it      cs;                                                     \
  63         bcs PIC_SYM(CERROR, PLT)
  64
  65 #define SYSCALL(x)                                                      \
  66         _SYSCALL(x)
  67
  68 #define PSEUDO(x)                                                       \
  69         ENTRY(__CONCAT(__sys_, x));                                     \
  70         .weak _C_LABEL(__CONCAT(_,x));                                  \
  71         .set _C_LABEL(__CONCAT(_,x)),_C_LABEL(__CONCAT(__sys_,x));      \
  72         SYSTRAP(x);                                                     \
  73         it      cs;                                                     \
  74         bcs PIC_SYM(CERROR, PLT);                                       \
  75         RET
  76
  77 #define RSYSCALL(x)                                                     \
  78         _SYSCALL(x);                                                    \
  79         RET
  80
  81         .globl  CERROR