tc-arm.h revision 60484
1/* This file is tc-arm.h 2 Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999 3 Free Software Foundation, Inc. 4 Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org) 5 Modified by David Taylor (dtaylor@armltd.co.uk) 6 7 This file is part of GAS, the GNU Assembler. 8 9 GAS is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 2, or (at your option) 12 any later version. 13 14 GAS is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with GAS; see the file COPYING. If not, write to the Free 21 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 22 02111-1307, USA. */ 23 24#define TC_ARM 1 25 26#ifndef TARGET_BYTES_BIG_ENDIAN 27#define TARGET_BYTES_BIG_ENDIAN 0 28#endif 29 30#define WORKING_DOT_WORD 31 32#define COFF_MAGIC ARMMAGIC 33#define TARGET_ARCH bfd_arch_arm 34 35#define AOUT_MACHTYPE 0 36 37#define DIFF_EXPR_OK 38 39#ifdef LITTLE_ENDIAN 40#undef LITTLE_ENDIAN 41#endif 42 43#ifdef BIG_ENDIAN 44#undef BIG_ENDIAN 45#endif 46 47#define LITTLE_ENDIAN 1234 48#define BIG_ENDIAN 4321 49 50#if defined OBJ_AOUT 51#if defined TE_RISCIX 52# define TARGET_FORMAT "a.out-riscix" 53#elif defined TE_LINUX 54# define ARM_BI_ENDIAN 55# define TARGET_FORMAT "a.out-arm-linux" 56#elif defined TE_NetBSD 57# define TARGET_FORMAT "a.out-arm-netbsd" 58#else 59# define ARM_BI_ENDIAN 60# define TARGET_FORMAT \ 61 (target_big_endian ? "a.out-arm-big" : "a.out-arm-little") 62#endif 63#endif /* OBJ_AOUT */ 64 65#ifdef OBJ_AIF 66#define TARGET_FORMAT "aif" 67#endif 68 69#if defined OBJ_COFF || defined OBJ_ELF 70# define ARM_BI_ENDIAN 71 72# define TC_VALIDATE_FIX(fixP, segType, Label) \ 73 if (arm_validate_fix (fixP)) add_symbolP = fixP->fx_addsy 74 extern boolean arm_validate_fix PARAMS ((struct fix *)); 75#endif 76 77#ifdef OBJ_COFF 78# if defined TE_PE 79# define TC_FORCE_RELOCATION(x) ((x)->fx_r_type == BFD_RELOC_RVA) 80# ifdef TE_EPOC 81# define TARGET_FORMAT (target_big_endian ? "epoc-pe-arm-big" : "epoc-pe-arm-little") 82# else 83# define TARGET_FORMAT (target_big_endian ? "pe-arm-big" : "pe-arm-little") 84# endif 85# else 86# define TARGET_FORMAT (target_big_endian ? "coff-arm-big" : "coff-arm-little") 87# endif 88#endif 89 90#ifdef OBJ_ELF 91# define TARGET_FORMAT elf32_arm_target_format() 92 extern const char * elf32_arm_target_format PARAMS ((void)); 93 94# define TC_FORCE_RELOCATION(fixp) arm_force_relocation (fixp) 95 extern int arm_force_relocation PARAMS ((struct fix *)); 96#endif 97 98#define md_convert_frag(b, s, f) {as_fatal (_("arm convert_frag\n"));} 99 100#define md_cleanup() arm_cleanup () 101 extern void arm_cleanup PARAMS ((void)); 102 103#define md_start_line_hook() arm_start_line_hook () 104 extern void arm_start_line_hook PARAMS ((void)); 105 106#define tc_frob_label(S) arm_frob_label (S) 107 extern void arm_frob_label PARAMS ((symbolS *)); 108 109/* We also need to mark assembler created symbols: */ 110#define tc_frob_fake_label(S) arm_frob_label (S) 111 112/* NOTE: The fake label creation in stabs.c:s_stab_generic() has 113 deliberately not been updated to mark assembler created stabs 114 symbols as Thumb. */ 115 116#define TC_FIX_TYPE PTR 117#define TC_INIT_FIX_DATA(FIXP) ((FIXP)->tc_fix_data = NULL) 118 119#ifdef OBJ_ELF 120#include "write.h" /* For definition of fixS */ 121#define obj_fix_adjustable(fixP) arm_fix_adjustable (fixP) 122boolean arm_fix_adjustable PARAMS ((fixS *)); 123#else 124#define obj_fix_adjustable(fixP) 0 125#endif 126 127/* We need to keep some local information on symbols. */ 128 129#define TC_SYMFIELD_TYPE unsigned int 130#define ARM_GET_FLAG(s) (*symbol_get_tc (s)) 131#define ARM_SET_FLAG(s,v) (*symbol_get_tc (s) |= (v)) 132#define ARM_RESET_FLAG(s,v) (*symbol_get_tc (s) &= ~(v)) 133 134#define ARM_FLAG_THUMB (1 << 0) /* The symbol is a Thumb symbol rather than an Arm symbol. */ 135#define ARM_FLAG_INTERWORK (1 << 1) /* The symbol is attached to code that suppports interworking. */ 136#define THUMB_FLAG_FUNC (1 << 2) /* The symbol is attached to the start of a Thumb function. */ 137 138#define ARM_IS_THUMB(s) (ARM_GET_FLAG (s) & ARM_FLAG_THUMB) 139#define ARM_IS_INTERWORK(s) (ARM_GET_FLAG (s) & ARM_FLAG_INTERWORK) 140#define THUMB_IS_FUNC(s) (ARM_GET_FLAG (s) & THUMB_FLAG_FUNC) 141 142#define ARM_SET_THUMB(s,t) ((t) ? ARM_SET_FLAG (s, ARM_FLAG_THUMB) : ARM_RESET_FLAG (s, ARM_FLAG_THUMB)) 143#define ARM_SET_INTERWORK(s,t) ((t) ? ARM_SET_FLAG (s, ARM_FLAG_INTERWORK) : ARM_RESET_FLAG (s, ARM_FLAG_INTERWORK)) 144#define THUMB_SET_FUNC(s,t) ((t) ? ARM_SET_FLAG (s, THUMB_FLAG_FUNC) : ARM_RESET_FLAG (s, THUMB_FLAG_FUNC)) 145 146 147#define TC_START_LABEL(C,STR) \ 148 (c == ':' || (c == '/' && arm_data_in_code ())) 149int arm_data_in_code PARAMS ((void)); 150 151#define tc_canonicalize_symbol_name(str) \ 152 arm_canonicalize_symbol_name (str); 153char * arm_canonicalize_symbol_name PARAMS ((char *)); 154 155#define obj_adjust_symtab() arm_adjust_symtab () 156 extern void arm_adjust_symtab PARAMS ((void)); 157 158#ifdef OBJ_ELF 159#define obj_frob_symbol(sym, punt) armelf_frob_symbol ((sym), & (punt)) 160void armelf_frob_symbol PARAMS ((symbolS *, int *)); 161#endif 162 163#define tc_aout_pre_write_hook(x) {;} /* not used */ 164 165#define LISTING_HEADER "ARM GAS " 166 167#define OPTIONAL_REGISTER_PREFIX '%' 168 169#define md_operand(x) 170 171#define TC_HANDLES_FX_DONE 172 173#define MD_APPLY_FIX3 174 175#define LOCAL_LABEL(name) (name[0] == '.' && (name[1] == 'L')) 176#define LOCAL_LABELS_FB 1 177#ifdef OBJ_ELF 178#define LOCAL_LABEL_PREFIX '.' 179#endif 180 181/* This expression evaluates to false if the relocation is for a local object 182 for which we still want to do the relocation at runtime. True if we 183 are willing to perform this relocation while building the .o file. 184 This is only used for pcrel relocations, so GOTOFF does not need to be 185 checked here. I am not sure if some of the others are ever used with 186 pcrel, but it is easier to be safe than sorry. */ 187 188#define TC_RELOC_RTSYM_LOC_FIXUP(FIX) \ 189 ( (FIX)->fx_r_type != BFD_RELOC_ARM_GOT12 \ 190 && (FIX)->fx_r_type != BFD_RELOC_ARM_GOT32 \ 191 && (FIX)->fx_r_type != BFD_RELOC_32) 192 193#define TC_CONS_FIX_NEW cons_fix_new_arm 194 extern void cons_fix_new_arm PARAMS ((fragS *, int, int, expressionS *)); 195 196/* Don't allow symbols to be discarded on GOT related relocs, 197 nor on globals. */ 198#define tc_fix_adjustable(x) (\ 199 ((x)->fx_r_type == BFD_RELOC_ARM_PLT32 \ 200 || (x)->fx_r_type == BFD_RELOC_ARM_GOT32 \ 201 || (x)->fx_r_type == BFD_RELOC_ARM_GOTOFF \ 202 || S_IS_EXTERN ((x)->fx_addsy) \ 203 || S_IS_WEAK ((x)->fx_addsy)) ? 0 : 1) 204 205#ifdef OBJ_ELF 206#define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_" 207#else 208#define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_" 209#endif 210 211/* end of tc-arm.h */ 212