gcc/config/arm/linux-gas.h

   1 /* Definitions of target machine for GNU compiler.
   2    ARM Linux-based GNU systems version.
   3    Copyright (C) 1997-2013 Free Software Foundation, Inc.
   4    Contributed by Russell King  <rmk92@ecs.soton.ac.uk>.
   5
   6    This file is part of GCC.
   7
   8    GCC is free software; you can redistribute it and/or modify it
   9    under the terms of the GNU General Public License as published
  10    by the Free Software Foundation; either version 3, or (at your
  11    option) any later version.
  12
  13    GCC is distributed in the hope that it will be useful, but WITHOUT
  14    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  15    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  16    License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with GCC; see the file COPYING3.  If not see
  20    <http://www.gnu.org/licenses/>.  */
  21
  22 /* This is how we tell the assembler that a symbol is weak.
  23    GAS always supports weak symbols.  */
  24
  25 /* Unsigned chars produces much better code than signed.  */
  26 #define DEFAULT_SIGNED_CHAR 0
  27
  28 #undef  SUBTARGET_CPP_SPEC
  29 #define SUBTARGET_CPP_SPEC  "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
  30
  31 #undef  SIZE_TYPE
  32 #define SIZE_TYPE "unsigned int"
  33
  34 #undef  PTRDIFF_TYPE
  35 #define PTRDIFF_TYPE "int"
  36
  37 /* Use the AAPCS type for wchar_t, or the previous Linux default for
  38    non-AAPCS.  */
  39 #undef WCHAR_TYPE
  40 #define WCHAR_TYPE (TARGET_AAPCS_BASED ? "unsigned int" : "long int")
  41
  42 #undef  WCHAR_TYPE_SIZE
  43 #define WCHAR_TYPE_SIZE BITS_PER_WORD
  44
  45 /* Clear the instruction cache from `beg' to `end'.  This makes an
  46    inline system call to SYS_cacheflush.  */
  47 #define CLEAR_INSN_CACHE(BEG, END)                                      \
  48 {                                                                       \
  49   register unsigned long _beg __asm ("a1") = (unsigned long) (BEG);     \
  50   register unsigned long _end __asm ("a2") = (unsigned long) (END);     \
  51   register unsigned long _flg __asm ("a3") = 0;                         \
  52   __asm __volatile ("swi 0x9f0002               @ sys_cacheflush"       \
  53                     : "=r" (_beg)                                       \
  54                     : "0" (_beg), "r" (_end), "r" (_flg));              \
  55 }