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252b5132 | 1 | /* This file is tc-arm.h |
1dab94dd | 2 | Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000 |
49309057 | 3 | Free Software Foundation, Inc. |
252b5132 RH |
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 | |
1dab94dd | 71 | |
252b5132 RH |
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 | |
1dab94dd | 76 | |
252b5132 RH |
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)); | |
1dab94dd | 93 | |
252b5132 RH |
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) | |
49309057 | 107 | extern void arm_frob_label PARAMS ((symbolS *)); |
252b5132 RH |
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 | ||
29c4c6b5 NC |
116 | #define TC_FIX_TYPE PTR |
117 | #define TC_INIT_FIX_DATA(FIXP) ((FIXP)->tc_fix_data = NULL) | |
118 | ||
252b5132 | 119 | #ifdef OBJ_ELF |
29c4c6b5 | 120 | #include "write.h" /* For definition of fixS */ |
252b5132 | 121 | #define obj_fix_adjustable(fixP) arm_fix_adjustable (fixP) |
29c4c6b5 | 122 | boolean arm_fix_adjustable PARAMS ((fixS *)); |
8f36cd18 AO |
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) | |
252b5132 RH |
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 | |
174419c1 ILT |
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)) | |
252b5132 RH |
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 | ||
252b5132 RH |
150 | #define TC_START_LABEL(C,STR) \ |
151 | (c == ':' || (c == '/' && arm_data_in_code ())) | |
152 | int arm_data_in_code PARAMS ((void)); | |
153 | ||
154 | #define tc_canonicalize_symbol_name(str) \ | |
155 | arm_canonicalize_symbol_name (str); | |
156 | char * 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 | |
29c4c6b5 NC |
162 | #define obj_frob_symbol(sym, punt) armelf_frob_symbol ((sym), & (punt)) |
163 | void armelf_frob_symbol PARAMS ((symbolS *, int *)); | |
252b5132 RH |
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 | |
2f992c04 NC |
180 | #ifdef OBJ_ELF |
181 | #define LOCAL_LABEL_PREFIX '.' | |
182 | #endif | |
252b5132 RH |
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, | |
1dab94dd | 200 | nor on globals. */ |
252b5132 RH |
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) | |
1dab94dd | 207 | |
252b5132 RH |
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 | |
85a39694 NC |
213 | |
214 | #ifdef OBJ_ELF | |
215 | #define md_end() arm_end_of_source () | |
216 | extern void arm_end_of_source PARAMS ((void)); | |
217 | ||
218 | #define DWARF2_LINE_MIN_INSN_LENGTH 2 | |
219 | #endif |