gcc/config/arm/linux-tgas.h

   1 /* Definitions of target machine for GNU compiler.
   2    Thumb Linux-based GNU systems version.
   3    Copyright (C) 1999 Free Software Foundation, Inc.
   4    Contributed by Russell King  <rmk92@ecs.soton.ac.uk>.
   5
   6 This file is part of GNU CC.
   7
   8 GNU CC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2, or (at your option)
  11 any later version.
  12
  13 GNU CC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public 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 /* We are using GAS, so stabs should work.  */
  24 #ifndef DBX_DEBUGGING_INFO
  25 #define DBX_DEBUGGING_INFO 1
  26 #endif
  27
  28 /* This is how we tell the assembler that a symbol is weak.
  29    GAS always supports weak symbols.  */
  30 #define ASM_WEAKEN_LABEL(FILE, NAME)            \
  31   do                                            \
  32     {                                           \
  33       fputs ("\t.weak\t", FILE);                \
  34       assemble_name (FILE, NAME);               \
  35       fputc ('\n', FILE);                       \
  36     }                                           \
  37   while (0)
  38
  39 /* This is used in ASM_FILE_START */
  40 #undef  ARM_OS_NAME
  41 #define ARM_OS_NAME "Linux"
  42
  43 /* Unsigned chars produces much better code than signed.  */
  44 #define DEFAULT_SIGNED_CHAR 0
  45
  46 #undef  SUBTARGET_CPP_SPEC
  47 #define SUBTARGET_CPP_SPEC  "%{posix:-D_POSIX_SOURCE} %{fPIC:-D__PIC__ -D__pic__} %{fpic:-D__PIC__ -D__pic__}"
  48
  49 #undef  SIZE_TYPE
  50 #define SIZE_TYPE "unsigned int"
  51
  52 #undef  PTRDIFF_TYPE
  53 #define PTRDIFF_TYPE "int"
  54
  55 #undef  WCHAR_TYPE
  56 #define WCHAR_TYPE "long int"
  57
  58 #undef  WCHAR_TYPE_SIZE
  59 #define WCHAR_TYPE_SIZE BITS_PER_WORD
  60
  61 /* Emit code to set up a trampoline and synchronise the caches.  */
  62 #undef  INITIALIZE_TRAMPOLINE
  63 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT)                       \
  64 {                                                                       \
  65   emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 8)),      \
  66                   CXT);                                                 \
  67   emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 12)),     \
  68                   FNADDR);                                              \
  69   emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__clear_cache"),       \
  70                      0, VOIDmode, 2, TRAMP, Pmode,                      \
  71                      plus_constant (TRAMP, TRAMPOLINE_SIZE), Pmode);    \
  72 }
  73
  74 #if 0
  75 /* Clear the instruction cache from `beg' to `end'.  This makes an
  76    inline system call to SYS_cacheflush.  */
  77 #define CLEAR_INSN_CACHE(BEG, END)                                      \
  78 {                                                                       \
  79   register unsigned long _beg __asm ("a1") = (unsigned long) (BEG);     \
  80   register unsigned long _end __asm ("a2") = (unsigned long) (END);     \
  81   register unsigned long _flg __asm ("a3") = 0;                         \
  82   __asm __volatile ("swi 0x9f0002");                                    \
  83 }
  84 #endif