| 1 | /* This file is tc-arm.h |
| 2 | Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 |
| 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 | struct fix; |
| 70 | |
| 71 | #if defined OBJ_COFF || defined OBJ_ELF |
| 72 | # define ARM_BI_ENDIAN |
| 73 | |
| 74 | # define TC_VALIDATE_FIX(FIX, SEGTYPE, LABEL) arm_validate_fix (FIX) |
| 75 | extern void arm_validate_fix PARAMS ((struct fix *)); |
| 76 | #endif |
| 77 | |
| 78 | #ifdef OBJ_COFF |
| 79 | # if defined TE_PE |
| 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 | #endif |
| 94 | |
| 95 | #define TC_FORCE_RELOCATION(FIX) arm_force_relocation (FIX) |
| 96 | extern int arm_force_relocation PARAMS ((struct fix *)); |
| 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(FIX) ((FIX)->tc_fix_data = NULL) |
| 118 | |
| 119 | #if defined OBJ_ELF || defined OBJ_COFF |
| 120 | #define EXTERN_FORCE_RELOC 1 |
| 121 | |
| 122 | #define tc_fix_adjustable(FIX) arm_fix_adjustable (FIX) |
| 123 | bfd_boolean arm_fix_adjustable PARAMS ((struct fix *)); |
| 124 | |
| 125 | /* Values passed to md_apply_fix3 don't include the symbol value. */ |
| 126 | #define MD_APPLY_SYM_VALUE(FIX) 0 |
| 127 | #endif |
| 128 | |
| 129 | /* We need to keep some local information on symbols. */ |
| 130 | |
| 131 | #define TC_SYMFIELD_TYPE unsigned int |
| 132 | #define ARM_GET_FLAG(s) (*symbol_get_tc (s)) |
| 133 | #define ARM_SET_FLAG(s,v) (*symbol_get_tc (s) |= (v)) |
| 134 | #define ARM_RESET_FLAG(s,v) (*symbol_get_tc (s) &= ~(v)) |
| 135 | |
| 136 | #define ARM_FLAG_THUMB (1 << 0) /* The symbol is a Thumb symbol rather than an Arm symbol. */ |
| 137 | #define ARM_FLAG_INTERWORK (1 << 1) /* The symbol is attached to code that suppports interworking. */ |
| 138 | #define THUMB_FLAG_FUNC (1 << 2) /* The symbol is attached to the start of a Thumb function. */ |
| 139 | |
| 140 | #define ARM_IS_THUMB(s) (ARM_GET_FLAG (s) & ARM_FLAG_THUMB) |
| 141 | #define ARM_IS_INTERWORK(s) (ARM_GET_FLAG (s) & ARM_FLAG_INTERWORK) |
| 142 | #define THUMB_IS_FUNC(s) (ARM_GET_FLAG (s) & THUMB_FLAG_FUNC) |
| 143 | |
| 144 | #define ARM_SET_THUMB(s,t) ((t) ? ARM_SET_FLAG (s, ARM_FLAG_THUMB) : ARM_RESET_FLAG (s, ARM_FLAG_THUMB)) |
| 145 | #define ARM_SET_INTERWORK(s,t) ((t) ? ARM_SET_FLAG (s, ARM_FLAG_INTERWORK) : ARM_RESET_FLAG (s, ARM_FLAG_INTERWORK)) |
| 146 | #define THUMB_SET_FUNC(s,t) ((t) ? ARM_SET_FLAG (s, THUMB_FLAG_FUNC) : ARM_RESET_FLAG (s, THUMB_FLAG_FUNC)) |
| 147 | |
| 148 | #define TC_START_LABEL(C,STR) \ |
| 149 | (c == ':' || (c == '/' && arm_data_in_code ())) |
| 150 | int arm_data_in_code PARAMS ((void)); |
| 151 | |
| 152 | #define tc_canonicalize_symbol_name(str) \ |
| 153 | arm_canonicalize_symbol_name (str); |
| 154 | char * arm_canonicalize_symbol_name PARAMS ((char *)); |
| 155 | |
| 156 | #define obj_adjust_symtab() arm_adjust_symtab () |
| 157 | extern void arm_adjust_symtab PARAMS ((void)); |
| 158 | |
| 159 | #ifdef OBJ_ELF |
| 160 | #define obj_frob_symbol(sym, punt) armelf_frob_symbol ((sym), & (punt)) |
| 161 | void armelf_frob_symbol PARAMS ((symbolS *, int *)); |
| 162 | #endif |
| 163 | |
| 164 | #define tc_aout_pre_write_hook(x) {;} /* not used */ |
| 165 | |
| 166 | #define LISTING_HEADER "ARM GAS " |
| 167 | |
| 168 | #define OPTIONAL_REGISTER_PREFIX '%' |
| 169 | |
| 170 | #define LOCAL_LABEL(name) (name[0] == '.' && (name[1] == 'L')) |
| 171 | #define LOCAL_LABELS_FB 1 |
| 172 | #ifdef OBJ_ELF |
| 173 | #define LOCAL_LABEL_PREFIX '.' |
| 174 | #endif |
| 175 | |
| 176 | /* This expression evaluates to true if the relocation is for a local |
| 177 | object for which we still want to do the relocation at runtime. |
| 178 | False if we are willing to perform this relocation while building |
| 179 | the .o file. GOTOFF does not need to be checked here because it is |
| 180 | not pcrel. I am not sure if some of the others are ever used with |
| 181 | pcrel, but it is easier to be safe than sorry. */ |
| 182 | |
| 183 | #define TC_FORCE_RELOCATION_LOCAL(FIX) \ |
| 184 | (!(FIX)->fx_pcrel \ |
| 185 | || (FIX)->fx_plt \ |
| 186 | || (FIX)->fx_r_type == BFD_RELOC_ARM_GOT12 \ |
| 187 | || (FIX)->fx_r_type == BFD_RELOC_ARM_GOT32 \ |
| 188 | || (FIX)->fx_r_type == BFD_RELOC_32 \ |
| 189 | || TC_FORCE_RELOCATION (FIX)) |
| 190 | |
| 191 | #define TC_CONS_FIX_NEW cons_fix_new_arm |
| 192 | extern void cons_fix_new_arm PARAMS ((fragS *, int, int, expressionS *)); |
| 193 | |
| 194 | #ifdef OBJ_ELF |
| 195 | #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_" |
| 196 | #else |
| 197 | #define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_" |
| 198 | #endif |
| 199 | |
| 200 | #ifdef OBJ_ELF |
| 201 | #define DWARF2_LINE_MIN_INSN_LENGTH 2 |
| 202 | #endif |
| 203 | |
| 204 | #define MAX_MEM_FOR_RS_ALIGN_CODE 31 |
| 205 | |
| 206 | /* For frags in code sections we need to record whether they contain |
| 207 | ARM code or THUMB code. This is that if they have to be aligned, |
| 208 | they can contain the correct type of no-op instruction. */ |
| 209 | #define TC_FRAG_TYPE int |
| 210 | #define TC_FRAG_INIT(fragp) arm_init_frag (fragp) |
| 211 | extern void arm_init_frag PARAMS ((struct frag *)); |
| 212 | |
| 213 | #define HANDLE_ALIGN(fragp) arm_handle_align (fragp) |
| 214 | extern void arm_handle_align PARAMS ((struct frag *)); |
| 215 | |
| 216 | #define md_do_align(N, FILL, LEN, MAX, LABEL) \ |
| 217 | if (FILL == NULL && (N) != 0 && ! need_pass_2 && subseg_text_p (now_seg)) \ |
| 218 | { \ |
| 219 | arm_frag_align_code (N, MAX); \ |
| 220 | goto LABEL; \ |
| 221 | } |
| 222 | extern void arm_frag_align_code PARAMS ((int, int)); |