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, 1998, 1999, 2000, 2001 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 2, 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 this program; see the file COPYING.  If not, write to
  20    the Free Software Foundation, 59 Temple Place - Suite 330,
  21    Boston, MA 02111-1307, USA.  */
  22
  23 /* This is how we tell the assembler that a symbol is weak.
  24    GAS always supports weak symbols.  */
  25
  26 /* Unsigned chars produces much better code than signed.  */
  27 #define DEFAULT_SIGNED_CHAR 0
  28
  29 #undef  SUBTARGET_CPP_SPEC
  30 #define SUBTARGET_CPP_SPEC  "%{posix:-D_POSIX_SOURCE} %{fPIC|fPIE:-D__PIC__ -D__pic__} %{fpic|fpie:-D__PIC__ -D__pic__}"
  31
  32 #undef  SIZE_TYPE
  33 #define SIZE_TYPE "unsigned int"
  34
  35 #undef  PTRDIFF_TYPE
  36 #define PTRDIFF_TYPE "int"
  37
  38 #undef  WCHAR_TYPE
  39 #define WCHAR_TYPE "long int"
  40
  41 #undef  WCHAR_TYPE_SIZE
  42 #define WCHAR_TYPE_SIZE BITS_PER_WORD
  43
  44 /* Emit code to set up a trampoline and synchronize the caches.  */
  45 #undef  INITIALIZE_TRAMPOLINE
  46 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT)                       \
  47 {                                                                       \
  48   emit_move_insn (gen_rtx (MEM, SImode, plus_constant ((TRAMP), 8)),    \
  49                   (CXT));                                               \
  50   emit_move_insn (gen_rtx (MEM, SImode, plus_constant ((TRAMP), 12)),   \
  51                   (FNADDR));                                            \
  52   emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__clear_cache"),       \
  53                      0, VOIDmode, 2, TRAMP, Pmode,                      \
  54                      plus_constant (TRAMP, TRAMPOLINE_SIZE), Pmode);    \
  55 }
  56
  57 /* Clear the instruction cache from `beg' to `end'.  This makes an
  58    inline system call to SYS_cacheflush.  */
  59 #define CLEAR_INSN_CACHE(BEG, END)                                      \
  60 {                                                                       \
  61   register unsigned long _beg __asm ("a1") = (unsigned long) (BEG);     \
  62   register unsigned long _end __asm ("a2") = (unsigned long) (END);     \
  63   register unsigned long _flg __asm ("a3") = 0;                         \
  64   __asm __volatile ("swi 0x9f0002               @ sys_cacheflush"       \
  65                     : "=r" (_beg)                                       \
  66                     : "0" (_beg), "r" (_end), "r" (_flg));              \
  67 }