tc-arm.h revision 78828
1/* This file is tc-arm.h 2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001 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#if defined OBJ_ELF || defined OBJ_COFF 120#include "write.h" /* For definition of fixS */ 121#define obj_fix_adjustable(fixP) arm_fix_adjustable (fixP) 122boolean arm_fix_adjustable PARAMS ((fixS *)); 123 124/* This arranges for gas/write.c to not apply a relocation if 125 obj_fix_adjustable() says it is not adjustable. */ 126#define TC_FIX_ADJUSTABLE(fixP) obj_fix_adjustable (fixP) 127#else 128#define obj_fix_adjustable(fixP) 0 129#endif 130 131/* We need to keep some local information on symbols. */ 132 133#define TC_SYMFIELD_TYPE unsigned int 134#define ARM_GET_FLAG(s) (*symbol_get_tc (s)) 135#define ARM_SET_FLAG(s,v) (*symbol_get_tc (s) |= (v)) 136#define ARM_RESET_FLAG(s,v) (*symbol_get_tc (s) &= ~(v)) 137 138#define ARM_FLAG_THUMB (1 << 0) /* The symbol is a Thumb symbol rather than an Arm symbol. */ 139#define ARM_FLAG_INTERWORK (1 << 1) /* The symbol is attached to code that suppports interworking. */ 140#define THUMB_FLAG_FUNC (1 << 2) /* The symbol is attached to the start of a Thumb function. */ 141 142#define ARM_IS_THUMB(s) (ARM_GET_FLAG (s) & ARM_FLAG_THUMB) 143#define ARM_IS_INTERWORK(s) (ARM_GET_FLAG (s) & ARM_FLAG_INTERWORK) 144#define THUMB_IS_FUNC(s) (ARM_GET_FLAG (s) & THUMB_FLAG_FUNC) 145 146#define ARM_SET_THUMB(s,t) ((t) ? ARM_SET_FLAG (s, ARM_FLAG_THUMB) : ARM_RESET_FLAG (s, ARM_FLAG_THUMB)) 147#define ARM_SET_INTERWORK(s,t) ((t) ? ARM_SET_FLAG (s, ARM_FLAG_INTERWORK) : ARM_RESET_FLAG (s, ARM_FLAG_INTERWORK)) 148#define THUMB_SET_FUNC(s,t) ((t) ? ARM_SET_FLAG (s, THUMB_FLAG_FUNC) : ARM_RESET_FLAG (s, THUMB_FLAG_FUNC)) 149 150#define TC_START_LABEL(C,STR) \ 151 (c == ':' || (c == '/' && arm_data_in_code ())) 152int arm_data_in_code PARAMS ((void)); 153 154#define tc_canonicalize_symbol_name(str) \ 155 arm_canonicalize_symbol_name (str); 156char * arm_canonicalize_symbol_name PARAMS ((char *)); 157 158#define obj_adjust_symtab() arm_adjust_symtab () 159 extern void arm_adjust_symtab PARAMS ((void)); 160 161#ifdef OBJ_ELF 162#define obj_frob_symbol(sym, punt) armelf_frob_symbol ((sym), & (punt)) 163void armelf_frob_symbol PARAMS ((symbolS *, int *)); 164#endif 165 166#define tc_aout_pre_write_hook(x) {;} /* not used */ 167 168#define LISTING_HEADER "ARM GAS " 169 170#define OPTIONAL_REGISTER_PREFIX '%' 171 172#define md_operand(x) 173 174#define TC_HANDLES_FX_DONE 175 176#define MD_APPLY_FIX3 177 178#define LOCAL_LABEL(name) (name[0] == '.' && (name[1] == 'L')) 179#define LOCAL_LABELS_FB 1 180#ifdef OBJ_ELF 181#define LOCAL_LABEL_PREFIX '.' 182#endif 183 184/* This expression evaluates to false if the relocation is for a local object 185 for which we still want to do the relocation at runtime. True if we 186 are willing to perform this relocation while building the .o file. 187 This is only used for pcrel relocations, so GOTOFF does not need to be 188 checked here. I am not sure if some of the others are ever used with 189 pcrel, but it is easier to be safe than sorry. */ 190 191#define TC_RELOC_RTSYM_LOC_FIXUP(FIX) \ 192 ( (FIX)->fx_r_type != BFD_RELOC_ARM_GOT12 \ 193 && (FIX)->fx_r_type != BFD_RELOC_ARM_GOT32 \ 194 && (FIX)->fx_r_type != BFD_RELOC_32) 195 196#define TC_CONS_FIX_NEW cons_fix_new_arm 197 extern void cons_fix_new_arm PARAMS ((fragS *, int, int, expressionS *)); 198 199/* Don't allow symbols to be discarded on GOT related relocs, 200 nor on globals. */ 201#define tc_fix_adjustable(x) (\ 202 ((x)->fx_r_type == BFD_RELOC_ARM_PLT32 \ 203 || (x)->fx_r_type == BFD_RELOC_ARM_GOT32 \ 204 || (x)->fx_r_type == BFD_RELOC_ARM_GOTOFF \ 205 || S_IS_EXTERN ((x)->fx_addsy) \ 206 || S_IS_WEAK ((x)->fx_addsy)) ? 0 : 1) 207 208#ifdef OBJ_ELF 209#define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_" 210#else 211#define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_" 212#endif 213 214#ifdef OBJ_ELF 215#define DWARF2_LINE_MIN_INSN_LENGTH 2 216#endif 217 218#define MAX_MEM_FOR_RS_ALIGN_CODE 31 219 220/* For frags in code sections we need to record whether they contain 221 ARM code or THUMB code. This is that if they have to be aligned, 222 they can contain the correct type of no-op instruction. */ 223#define TC_FRAG_TYPE int 224#define TC_FRAG_INIT(fragp) arm_init_frag (fragp) 225extern void arm_init_frag PARAMS ((struct frag *)); 226 227#define HANDLE_ALIGN(fragp) arm_handle_align (fragp) 228extern void arm_handle_align PARAMS ((struct frag *)); 229 230#define md_do_align(N, FILL, LEN, MAX, LABEL) \ 231 if (FILL == NULL && (N) != 0 && ! need_pass_2 && subseg_text_p (now_seg)) \ 232 { \ 233 arm_frag_align_code (N, MAX); \ 234 goto LABEL; \ 235 } 236extern void arm_frag_align_code PARAMS ((int, int)); 237