1/* Definitions of target machine for GNU compiler.
2   ARM Linux-based GNU systems version.
3   Copyright (C) 1997, 1998, 1999 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/*
24 * We are using GAS, so stabs should work.
25 */
26
27#ifndef DBX_DEBUGGING_INFO
28#define DBX_DEBUGGING_INFO 1
29#endif
30
31/*
32 * This is how we tell the assembler that a symbol is weak.  GAS always
33 * supports weak symbols.
34 */
35
36#define ASM_WEAKEN_LABEL(FILE,NAME) \
37  do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \
38       fputc ('\n', FILE); } while (0)
39
40/* This is used in ASM_FILE_START */
41#undef  ARM_OS_NAME
42#define ARM_OS_NAME "Linux"
43
44/* Unsigned chars produces much better code than signed.  */
45#define DEFAULT_SIGNED_CHAR 0
46
47#undef  SUBTARGET_CPP_SPEC
48#define SUBTARGET_CPP_SPEC  "%{posix:-D_POSIX_SOURCE} %{fPIC:-D__PIC__ -D__pic__} %{fpic:-D__PIC__ -D__pic__}"
49
50#undef  SIZE_TYPE
51#define SIZE_TYPE "unsigned int"
52
53#undef  PTRDIFF_TYPE
54#define PTRDIFF_TYPE "int"
55
56#undef  WCHAR_TYPE
57#define WCHAR_TYPE "long int"
58
59#undef  WCHAR_TYPE_SIZE
60#define WCHAR_TYPE_SIZE BITS_PER_WORD
61
62/* Emit code to set up a trampoline and synchronise the caches.  */
63#undef  INITIALIZE_TRAMPOLINE
64#define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT)			\
65{									\
66  emit_move_insn (gen_rtx (MEM, SImode, plus_constant ((TRAMP), 8)),	\
67		  (CXT));						\
68  emit_move_insn (gen_rtx (MEM, SImode, plus_constant ((TRAMP), 12)),	\
69		  (FNADDR));						\
70  emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__clear_cache"),	\
71		     0, VOIDmode, 2, TRAMP, Pmode,			\
72		     plus_constant (TRAMP, TRAMPOLINE_SIZE), Pmode);	\
73}
74
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