lib/libc/powerpc64/SYS.h

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 2002 Benno Rice.  All rights reserved.
   5  * Copyright (c) 2002 David E. O'Brien.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the author nor the names of any contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  *      $NetBSD: SYS.h,v 1.8 2002/01/14 00:55:56 thorpej Exp $
  32  * $FreeBSD$
  33  */
  34
  35 #include <sys/syscall.h>
  36 #include <machine/asm.h>
  37
  38 #define _SYSCALL(name)                                          \
  39         .text;                                                  \
  40         .align 2;                                               \
  41         li      0,(SYS_##name);                                 \
  42         sc
  43
  44 #define SYSCALL(name)                                           \
  45         .text;                                                  \
  46         .align 2;                                               \
  47 2:      mflr    %r0;                                            \
  48         std     %r0,16(%r1);                                    \
  49         stdu    %r1,-48(%r1);                                   \
  50         bl      CNAME(HIDENAME(cerror));                        \
  51         nop;                                                    \
  52         addi    %r1,%r1,48;                                     \
  53         ld      %r0,16(%r1);                                    \
  54         mtlr    %r0;                                            \
  55         blr;                                                    \
  56 ENTRY(__sys_##name);                                            \
  57         WEAK_REFERENCE(__sys_##name, name);                     \
  58         WEAK_REFERENCE(__sys_##name, _##name);                  \
  59         _SYSCALL(name);                                         \
  60         bso     2b
  61
  62 #define PSEUDO(name)                                            \
  63         .text;                                                  \
  64         .align 2;                                               \
  65 ENTRY(__sys_##name);                                            \
  66         WEAK_REFERENCE(__sys_##name, _##name);                  \
  67         _SYSCALL(name);                                         \
  68         bnslr;                                                  \
  69         mflr    %r0;                                            \
  70         std     %r0,16(%r1);                                    \
  71         stdu    %r1,-48(%r1);                                   \
  72         bl      CNAME(HIDENAME(cerror));                        \
  73         nop;                                                    \
  74         addi    %r1,%r1,48;                                     \
  75         ld      %r0,16(%r1);                                    \
  76         mtlr    %r0;                                            \
  77         blr;
  78
  79 #define RSYSCALL(name)                                          \
  80         .text;                                                  \
  81         .align 2;                                               \
  82 ENTRY(__sys_##name);                                            \
  83         WEAK_REFERENCE(__sys_##name, name);                     \
  84         WEAK_REFERENCE(__sys_##name, _##name);                  \
  85         _SYSCALL(name);                                         \
  86         bnslr;                                                  \
  87                                                                 \
  88         mflr    %r0;                                            \
  89         std     %r0,16(%r1);                                    \
  90         stdu    %r1,-48(%r1);                                   \
  91         bl      CNAME(HIDENAME(cerror));                        \
  92         nop;                                                    \
  93         addi    %r1,%r1,48;                                     \
  94         ld      %r0,16(%r1);                                    \
  95         mtlr    %r0;                                            \
  96         blr;