lib/libc/arch/sh3/SYS.h

   1 /*-
   2  * Copyright (c) 1990 The Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * William Jolitz.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  *      from: @(#)SYS.h 5.5 (Berkeley) 5/7/91
  33  *      $NetBSD: SYS.h,v 1.8 2006/01/06 03:58:31 uwe Exp $
  34  */
  35
  36 #include <machine/asm.h>
  37 #include <sys/syscall.h>
  38
  39 #ifdef __STDC__
  40 #define SYSTRAP(x)                                      \
  41                 mov.l   903f, r0;                       \
  42                 .long   0xc380; /* trapa #0x80 */       \
  43                 bra     904f;                           \
  44                  nop;                                   \
  45                 .align  2;                              \
  46         903:    .long   (SYS_ ## x);                    \
  47         904:
  48 #else
  49 #define SYSTRAP(x)                                      \
  50                 mov.l   903f, r0;                       \
  51                 trapa   #0x80;                          \
  52                 bra     904f;                           \
  53                  nop;                                   \
  54                 .align  2;                              \
  55         903:    .long   (SYS_/**/x);                    \
  56         904:
  57 #endif
  58
  59 #define _SYSCALL_NOERROR(x,y)                           \
  60                 ENTRY(x);                               \
  61                 SYSTRAP(y)
  62
  63 #ifdef PIC
  64
  65 #define JUMP_CERROR                                     \
  66                 mov     r0, r4;                         \
  67                 mov.l   912f, r1;                       \
  68                 mova    912f, r0;                       \
  69                 mov.l   913f, r2;                       \
  70                 add     r1, r0;                         \
  71                 mov.l   @(r0, r2), r3;                  \
  72                 jmp     @r3;                            \
  73                  nop;                                   \
  74                 .align  2;                              \
  75         912:    .long   _GLOBAL_OFFSET_TABLE_;          \
  76         913:    .long   PIC_GOT(cerror)
  77
  78 #else  /* !PIC */
  79
  80 #define JUMP_CERROR                                     \
  81                 mov.l   912f, r3;                       \
  82                 jmp     @r3;                            \
  83                  mov    r0, r4;                         \
  84                 .align  2;                              \
  85         912:    .long   cerror
  86
  87 #endif /* !PIC */
  88
  89 #define _SYSCALL(x,y)                                   \
  90                 .text;                                  \
  91         911:    JUMP_CERROR;                            \
  92                 _SYSCALL_NOERROR(x,y);                  \
  93                 bf      911b
  94
  95 #define SYSCALL_NOERROR(x)                              \
  96                 _SYSCALL_NOERROR(x,x)
  97
  98 #define SYSCALL(x)                                      \
  99                 _SYSCALL(x,x)
 100
 101 #define PSEUDO_NOERROR(x,y)                             \
 102                 _SYSCALL_NOERROR(x,y);                  \
 103                 rts;                                    \
 104                  nop
 105
 106 #define PSEUDO(x,y)                                     \
 107                 _SYSCALL(x,y);                          \
 108                 rts;                                    \
 109                  nop
 110
 111 #define RSYSCALL_NOERROR(x)                             \
 112                 PSEUDO_NOERROR(x,x)
 113
 114 #define RSYSCALL(x)                                     \
 115                 PSEUDO(x,x)
 116
 117 #ifdef WEAK_ALIAS
 118 #define WSYSCALL(weak,strong)                           \
 119                 WEAK_ALIAS(weak,strong);                \
 120                 PSEUDO(strong,weak)
 121 #else
 122 #define WSYSCALL(weak,strong)                           \
 123                 PSEUDO(weak,weak)
 124 #endif
 125
 126         .globl  cerror