sysdeps/unix/sysv/linux/powerpc/sysdep.h

   1 /* Copyright (C) 1992, 1997 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #include <sysdeps/unix/sysdep.h>
  20
  21 /* For Linux we can use the system call table in the header file
  22         /usr/include/asm/unistd.h
  23    of the kernel.  But these symbols do not follow the SYS_* syntax
  24    so we have to redefine the `SYS_ify' macro here.  */
  25 #undef SYS_ify
  26 #ifdef __STDC__
  27 # define SYS_ify(syscall_name)  __NR_##syscall_name
  28 #else
  29 # define SYS_ify(syscall_name)  __NR_/**/syscall_name
  30 #endif
  31
  32 #ifdef ASSEMBLER
  33
  34 #define ENTRY(name)                                                           \
  35   .globl name;                                                                \
  36   .type name,@function;                                                       \
  37   .align 2;                                                                   \
  38   C_LABEL(name)
  39
  40 #define DO_CALL(syscall)                                                      \
  41     li 0,syscall;                                                             \
  42     sc
  43
  44 #ifdef PIC
  45 #define PSEUDO(name, syscall_name, args)                                      \
  46   .section ".text";                                                           \
  47   ENTRY (name)                                                                \
  48     DO_CALL (SYS_ify (syscall_name));                                         \
  49     bnslr;                                                                    \
  50     b __syscall_error@plt
  51 #else
  52 #define PSEUDO(name, syscall_name, args)                                      \
  53   .section ".text";                                                           \
  54   ENTRY (name)                                                                \
  55     DO_CALL (SYS_ify (syscall_name));                                         \
  56     bnslr;                                                                    \
  57     b __syscall_error
  58 #endif
  59
  60 #define ret     /* Nothing (should be 'blr', but never reached).  */
  61
  62 #endif  /* ASSEMBLER */