linux-gas.h revision 117395 
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
6This file is part of GNU CC.
7
8GNU CC is free software; you can redistribute it and/or modify
9it under the terms of the GNU General Public License as published by
10the Free Software Foundation; either version 2, or (at your option)
11any later version.
12
13GNU CC is distributed in the hope that it will be useful,
14but WITHOUT ANY WARRANTY; without even the implied warranty of
15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16GNU General Public License for more details.
17
18You should have received a copy of the GNU General Public License
19along with this program; see the file COPYING.  If not, write to
20the Free Software Foundation, 59 Temple Place - Suite 330,
21Boston, 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/* This is used in ASM_FILE_START.  */
27#undef  ARM_OS_NAME
28#define ARM_OS_NAME "Linux"
29
30/* Unsigned chars produces much better code than signed.  */
31#define DEFAULT_SIGNED_CHAR 0
32
33#undef  SUBTARGET_CPP_SPEC
34#define SUBTARGET_CPP_SPEC  "%{posix:-D_POSIX_SOURCE} %{fPIC:-D__PIC__ -D__pic__} %{fpic:-D__PIC__ -D__pic__}"
35
36#undef  SIZE_TYPE
37#define SIZE_TYPE "unsigned int"
38
39#undef  PTRDIFF_TYPE
40#define PTRDIFF_TYPE "int"
41
42#undef  WCHAR_TYPE
43#define WCHAR_TYPE "long int"
44
45#undef  WCHAR_TYPE_SIZE
46#define WCHAR_TYPE_SIZE BITS_PER_WORD
47
48/* Emit code to set up a trampoline and synchronize the caches.  */
49#undef  INITIALIZE_TRAMPOLINE
50#define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT)			\
51{									\
52  emit_move_insn (gen_rtx (MEM, SImode, plus_constant ((TRAMP), 8)),	\
53		  (CXT));						\
54  emit_move_insn (gen_rtx (MEM, SImode, plus_constant ((TRAMP), 12)),	\
55		  (FNADDR));						\
56  emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__clear_cache"),	\
57		     0, VOIDmode, 2, TRAMP, Pmode,			\
58		     plus_constant (TRAMP, TRAMPOLINE_SIZE), Pmode);	\
59}
60
61/* Clear the instruction cache from `beg' to `end'.  This makes an
62   inline system call to SYS_cacheflush.  */
63#define CLEAR_INSN_CACHE(BEG, END)					\
64{									\
65  register unsigned long _beg __asm ("a1") = (unsigned long) (BEG);	\
66  register unsigned long _end __asm ("a2") = (unsigned long) (END);	\
67  register unsigned long _flg __asm ("a3") = 0;				\
68  __asm __volatile ("swi 0x9f0002		@ sys_cacheflush"	\
69		    : "=r" (_beg)					\
70		    : "0" (_beg), "r" (_end), "r" (_flg));		\
71}
72