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