linux-gas.h revision 132718 
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}
68