libgloss/rx/rxsys.h

   1 /*
   2
   3 Copyright (c) 2005, 2009 Red Hat Incorporated.
   4 All rights reserved.
   5
   6 Redistribution and use in source and binary forms, with or without
   7 modification, are permitted provided that the following conditions are met:
   8
   9     Redistributions of source code must retain the above copyright
  10     notice, this list of conditions and the following disclaimer.
  11
  12     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
  16     The name of Red Hat Incorporated may not be used to endorse
  17     or promote products derived from this software without specific
  18     prior written permission.
  19
  20 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  21 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  23 DISCLAIMED.  IN NO EVENT SHALL RED HAT INCORPORATED BE LIABLE FOR ANY
  24 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  25 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  26 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  27 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  28 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  29 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30
  31 */
  32
  33 #include "syscall.h"
  34
  35     /* This mixture of C pre-processor macros and assembler
  36        macros is to get around the fact that the RX assembler
  37        does not support a line separator character.  */
  38
  39 #define SYS__exit  SYS_exit
  40
  41         .macro syscall_body  number
  42          /* We use interrupt 255 as a system call,
  43             with the call number in r5.  */
  44         mov     # \number, r5
  45         int     # 255
  46         rts
  47         .endm
  48
  49
  50         .macro do_syscall  name number
  51 __\name:
  52         .global __\name
  53 _\name:
  54         .weak _\name
  55         syscall_body \number
  56         .endm
  57
  58
  59 #define S(name)         do_syscall    name SYS_##name
  60 #define SYSCALL(number) syscall_body  number