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
  37 #include <machine/asm.h>
  38 #include <sys/syscall.h>
  39
  40 #define SYSTRAP(x)                                                      \
  41                         mov ip, r7;                                     \
  42                         ldr r7, =SYS_ ## x;                             \
  43                         swi 0;                                          \
  44                         mov r7, ip
  45
  46 #define CERROR          _C_LABEL(cerror)
  47 #define CURBRK          _C_LABEL(curbrk)
  48
  49 #define _SYSCALL_NOERROR(x)                                             \
  50         ENTRY(__CONCAT(__sys_, x));                                     \
  51         .weak _C_LABEL(x);                                              \
  52         .set _C_LABEL(x), _C_LABEL(__CONCAT(__sys_,x));                 \
  53         .weak _C_LABEL(__CONCAT(_,x));                                  \
  54         .set _C_LABEL(__CONCAT(_,x)),_C_LABEL(__CONCAT(__sys_,x));      \
  55         SYSTRAP(x)
  56
  57 #define _SYSCALL(x)                                                     \
  58         _SYSCALL_NOERROR(x);                                            \
  59         it      cs;                                                     \
  60         bcs PIC_SYM(CERROR, PLT)
  61
  62 #define SYSCALL(x)                                                      \
  63         _SYSCALL(x)
  64
  65 #define PSEUDO(x)                                                       \
  66         ENTRY(__CONCAT(__sys_, x));                                     \
  67         .weak _C_LABEL(__CONCAT(_,x));                                  \
  68         .set _C_LABEL(__CONCAT(_,x)),_C_LABEL(__CONCAT(__sys_,x));      \
  69         SYSTRAP(x);                                                     \
  70         it      cs;                                                     \
  71         bcs PIC_SYM(CERROR, PLT);                                       \
  72         RET
  73
  74 #define RSYSCALL(x)                                                     \
  75         _SYSCALL(x);                                                    \
  76         RET
  77
  78         .globl  CERROR