1 /* This file is tc-arm.h 2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2004 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 struct fix; 51 52 #if defined OBJ_AOUT 53 # if defined TE_RISCIX 54 # define TARGET_FORMAT "a.out-riscix" 55 # elif defined TE_LINUX 56 # define ARM_BI_ENDIAN 57 # define TARGET_FORMAT "a.out-arm-linux" 58 # elif defined TE_NetBSD 59 # define TARGET_FORMAT "a.out-arm-netbsd" 60 # else 61 # define ARM_BI_ENDIAN 62 # define TARGET_FORMAT (target_big_endian ? "a.out-arm-big" : "a.out-arm-little") 63 # endif 64 #elif defined OBJ_AIF 65 # define TARGET_FORMAT "aif" 66 #elif defined OBJ_COFF 67 # define ARM_BI_ENDIAN 68 # if defined TE_PE 69 # if defined TE_EPOC 70 # define TARGET_FORMAT (target_big_endian ? "epoc-pe-arm-big" : "epoc-pe-arm-little") 71 # else 72 # define TARGET_FORMAT (target_big_endian ? "pe-arm-big" : "pe-arm-little") 73 # endif 74 # else 75 # define TARGET_FORMAT (target_big_endian ? "coff-arm-big" : "coff-arm-little") 76 # endif 77 #elif defined OBJ_ELF 78 # define ARM_BI_ENDIAN 79 # define TARGET_FORMAT elf32_arm_target_format () 80 #endif 81 82 #define TC_FORCE_RELOCATION(FIX) arm_force_relocation (FIX) 83 84 #define md_convert_frag(b, s, f) { as_fatal (_("arm convert_frag\n")); } 85 86 #define md_cleanup() arm_cleanup () 87 88 #define md_start_line_hook() arm_start_line_hook () 89 90 #define tc_frob_label(S) arm_frob_label (S) 91 92 /* We also need to mark assembler created symbols: */ 93 #define tc_frob_fake_label(S) arm_frob_label (S) 94 95 /* NOTE: The fake label creation in stabs.c:s_stab_generic() has 96 deliberately not been updated to mark assembler created stabs 97 symbols as Thumb. */ 98 99 #define TC_FIX_TYPE PTR 100 #define TC_INIT_FIX_DATA(FIX) ((FIX)->tc_fix_data = NULL) 101 102 /* We need to keep some local information on symbols. */ 103 104 #define TC_SYMFIELD_TYPE unsigned int 105 #define ARM_GET_FLAG(s) (*symbol_get_tc (s)) 106 #define ARM_SET_FLAG(s,v) (*symbol_get_tc (s) |= (v)) 107 #define ARM_RESET_FLAG(s,v) (*symbol_get_tc (s) &= ~(v)) 108 109 #define ARM_FLAG_THUMB (1 << 0) /* The symbol is a Thumb symbol rather than an Arm symbol. */ 110 #define ARM_FLAG_INTERWORK (1 << 1) /* The symbol is attached to code that supports interworking. */ 111 #define THUMB_FLAG_FUNC (1 << 2) /* The symbol is attached to the start of a Thumb function. */ 112 113 #define ARM_IS_THUMB(s) (ARM_GET_FLAG (s) & ARM_FLAG_THUMB) 114 #define ARM_IS_INTERWORK(s) (ARM_GET_FLAG (s) & ARM_FLAG_INTERWORK) 115 #define THUMB_IS_FUNC(s) (ARM_GET_FLAG (s) & THUMB_FLAG_FUNC) 116 117 #define ARM_SET_THUMB(s,t) ((t) ? ARM_SET_FLAG (s, ARM_FLAG_THUMB) : ARM_RESET_FLAG (s, ARM_FLAG_THUMB)) 118 #define ARM_SET_INTERWORK(s,t) ((t) ? ARM_SET_FLAG (s, ARM_FLAG_INTERWORK) : ARM_RESET_FLAG (s, ARM_FLAG_INTERWORK)) 119 #define THUMB_SET_FUNC(s,t) ((t) ? ARM_SET_FLAG (s, THUMB_FLAG_FUNC) : ARM_RESET_FLAG (s, THUMB_FLAG_FUNC)) 120 121 #define TC_START_LABEL(C,STR) (c == ':' || (c == '/' && arm_data_in_code ())) 122 #define tc_canonicalize_symbol_name(str) arm_canonicalize_symbol_name (str); 123 #define obj_adjust_symtab() arm_adjust_symtab () 124 #define tc_aout_pre_write_hook(x) {;} /* not used */ 125 126 #define LISTING_HEADER "ARM GAS " 127 128 #define OPTIONAL_REGISTER_PREFIX '%' 129 130 #define LOCAL_LABEL(name) (name[0] == '.' && (name[1] == 'L')) 131 #define LOCAL_LABELS_FB 1 132 133 /* This expression evaluates to true if the relocation is for a local 134 object for which we still want to do the relocation at runtime. 135 False if we are willing to perform this relocation while building 136 the .o file. GOTOFF does not need to be checked here because it is 137 not pcrel. I am not sure if some of the others are ever used with 138 pcrel, but it is easier to be safe than sorry. */ 139 140 #define TC_FORCE_RELOCATION_LOCAL(FIX) \ 141 (!(FIX)->fx_pcrel \ 142 || (FIX)->fx_plt \ 143 || (FIX)->fx_r_type == BFD_RELOC_ARM_GOT12 \ 144 || (FIX)->fx_r_type == BFD_RELOC_ARM_GOT32 \ 145 || (FIX)->fx_r_type == BFD_RELOC_32 \ 146 || TC_FORCE_RELOCATION (FIX)) 147 148 #define TC_CONS_FIX_NEW cons_fix_new_arm 149 150 #define MAX_MEM_FOR_RS_ALIGN_CODE 31 151 152 /* For frags in code sections we need to record whether they contain 153 ARM code or THUMB code. This is that if they have to be aligned, 154 they can contain the correct type of no-op instruction. */ 155 #define TC_FRAG_TYPE int 156 #define TC_FRAG_INIT(fragp) arm_init_frag (fragp) 157 #define HANDLE_ALIGN(fragp) arm_handle_align (fragp) 158 159 #define md_do_align(N, FILL, LEN, MAX, LABEL) \ 160 if (FILL == NULL && (N) != 0 && ! need_pass_2 && subseg_text_p (now_seg)) \ 161 { \ 162 arm_frag_align_code (N, MAX); \ 163 goto LABEL; \ 164 } 165 166 #ifdef OBJ_ELF 167 # define DWARF2_LINE_MIN_INSN_LENGTH 2 168 # define obj_frob_symbol(sym, punt) armelf_frob_symbol ((sym), & (punt)) 169 # define md_elf_section_change_hook() arm_elf_change_section () 170 # define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_" 171 # define LOCAL_LABEL_PREFIX '.' 172 # define TC_SEGMENT_INFO_TYPE enum mstate 173 174 enum mstate 175 { 176 MAP_UNDEFINED = 0, /* Must be zero, for seginfo in new sections. */ 177 MAP_DATA, 178 MAP_ARM, 179 MAP_THUMB 180 }; 181 182 #else /* Not OBJ_ELF. */ 183 #define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_" 184 #endif 185 186 #if defined OBJ_ELF || defined OBJ_COFF 187 188 # define EXTERN_FORCE_RELOC 1 189 # define tc_fix_adjustable(FIX) arm_fix_adjustable (FIX) 190 /* Values passed to md_apply_fix3 don't include the symbol value. */ 191 # define MD_APPLY_SYM_VALUE(FIX) 0 192 # define TC_VALIDATE_FIX(FIX, SEGTYPE, LABEL) arm_validate_fix (FIX) 193 194 #endif 195 196 extern void arm_frag_align_code (int, int); 197 extern void arm_validate_fix (struct fix *); 198 extern const char * elf32_arm_target_format (void); 199 extern void arm_elf_change_section (void); 200 extern int arm_force_relocation (struct fix *); 201 extern void arm_cleanup (void); 202 extern void arm_start_line_hook (void); 203 extern void arm_frob_label (symbolS *); 204 extern int arm_data_in_code (void); 205 extern char * arm_canonicalize_symbol_name (char *); 206 extern void arm_adjust_symtab (void); 207 extern void armelf_frob_symbol (symbolS *, int *); 208 extern void cons_fix_new_arm (fragS *, int, int, expressionS *); 209 extern void arm_init_frag (struct frag *); 210 extern void arm_handle_align (struct frag *); 211 extern bfd_boolean arm_fix_adjustable (struct fix *); 212