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