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252b5132 | 1 | /* This file is tc-arm.h |
aef6203b AM |
2 | Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, |
3 | 2004 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 | |
4b4da160 NC |
21 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
22 | 02110-1301, USA. */ | |
252b5132 RH |
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 | ||
a161fe53 AM |
50 | struct fix; |
51 | ||
69b97547 NC |
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 | |
252b5132 | 67 | # define ARM_BI_ENDIAN |
252b5132 | 68 | # if defined TE_PE |
69b97547 NC |
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 | |
252b5132 RH |
74 | # else |
75 | # define TARGET_FORMAT (target_big_endian ? "coff-arm-big" : "coff-arm-little") | |
76 | # endif | |
69b97547 NC |
77 | #elif defined OBJ_ELF |
78 | # define ARM_BI_ENDIAN | |
79 | # define TARGET_FORMAT elf32_arm_target_format () | |
252b5132 RH |
80 | #endif |
81 | ||
114424c6 | 82 | #define TC_FORCE_RELOCATION(FIX) arm_force_relocation (FIX) |
114424c6 | 83 | |
69b97547 | 84 | #define md_convert_frag(b, s, f) { as_fatal (_("arm convert_frag\n")); } |
252b5132 RH |
85 | |
86 | #define md_cleanup() arm_cleanup () | |
252b5132 RH |
87 | |
88 | #define md_start_line_hook() arm_start_line_hook () | |
252b5132 RH |
89 | |
90 | #define tc_frob_label(S) arm_frob_label (S) | |
252b5132 RH |
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 | ||
29c4c6b5 | 99 | #define TC_FIX_TYPE PTR |
a161fe53 | 100 | #define TC_INIT_FIX_DATA(FIX) ((FIX)->tc_fix_data = NULL) |
29c4c6b5 | 101 | |
252b5132 RH |
102 | /* We need to keep some local information on symbols. */ |
103 | ||
69b97547 | 104 | #define TC_SYMFIELD_TYPE unsigned int |
174419c1 ILT |
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)) | |
252b5132 RH |
108 | |
109 | #define ARM_FLAG_THUMB (1 << 0) /* The symbol is a Thumb symbol rather than an Arm symbol. */ | |
2d2255b5 | 110 | #define ARM_FLAG_INTERWORK (1 << 1) /* The symbol is attached to code that supports interworking. */ |
252b5132 RH |
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 | ||
69b97547 NC |
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 */ | |
252b5132 RH |
125 | |
126 | #define LISTING_HEADER "ARM GAS " | |
127 | ||
128 | #define OPTIONAL_REGISTER_PREFIX '%' | |
129 | ||
252b5132 RH |
130 | #define LOCAL_LABEL(name) (name[0] == '.' && (name[1] == 'L')) |
131 | #define LOCAL_LABELS_FB 1 | |
132 | ||
a161fe53 AM |
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 | |
252b5132 RH |
138 | pcrel, but it is easier to be safe than sorry. */ |
139 | ||
a161fe53 AM |
140 | #define TC_FORCE_RELOCATION_LOCAL(FIX) \ |
141 | (!(FIX)->fx_pcrel \ | |
142 | || (FIX)->fx_plt \ | |
a161fe53 AM |
143 | || (FIX)->fx_r_type == BFD_RELOC_ARM_GOT32 \ |
144 | || (FIX)->fx_r_type == BFD_RELOC_32 \ | |
145 | || TC_FORCE_RELOCATION (FIX)) | |
252b5132 RH |
146 | |
147 | #define TC_CONS_FIX_NEW cons_fix_new_arm | |
16a0c2d4 | 148 | |
d8708f40 NC |
149 | #define MAX_MEM_FOR_RS_ALIGN_CODE 31 |
150 | ||
16a0c2d4 NC |
151 | /* For frags in code sections we need to record whether they contain |
152 | ARM code or THUMB code. This is that if they have to be aligned, | |
153 | they can contain the correct type of no-op instruction. */ | |
69b97547 | 154 | #define TC_FRAG_TYPE int |
16a0c2d4 | 155 | #define TC_FRAG_INIT(fragp) arm_init_frag (fragp) |
69b97547 | 156 | #define HANDLE_ALIGN(fragp) arm_handle_align (fragp) |
16a0c2d4 NC |
157 | |
158 | #define md_do_align(N, FILL, LEN, MAX, LABEL) \ | |
159 | if (FILL == NULL && (N) != 0 && ! need_pass_2 && subseg_text_p (now_seg)) \ | |
160 | { \ | |
161 | arm_frag_align_code (N, MAX); \ | |
162 | goto LABEL; \ | |
163 | } | |
69b97547 NC |
164 | |
165 | #ifdef OBJ_ELF | |
166 | # define DWARF2_LINE_MIN_INSN_LENGTH 2 | |
167 | # define obj_frob_symbol(sym, punt) armelf_frob_symbol ((sym), & (punt)) | |
168 | # define md_elf_section_change_hook() arm_elf_change_section () | |
40a18ebd | 169 | # define md_elf_section_type(str, len) arm_elf_section_type (str, len) |
69b97547 NC |
170 | # define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_" |
171 | # define LOCAL_LABEL_PREFIX '.' | |
84798bd6 | 172 | # define TC_SEGMENT_INFO_TYPE struct arm_segment_info_type |
69b97547 NC |
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 | ||
84798bd6 JB |
182 | struct arm_segment_info_type |
183 | { | |
184 | enum mstate mapstate; | |
185 | unsigned int marked_pr_dependency; | |
186 | }; | |
187 | ||
a394c00f NC |
188 | /* We want .cfi_* pseudo-ops for generating unwind info. */ |
189 | #define TARGET_USE_CFIPOP 1 | |
190 | ||
191 | /* The lr register is r14. */ | |
192 | #define DWARF2_DEFAULT_RETURN_COLUMN 14 | |
193 | ||
194 | /* Registers are generally saved at negative offsets to the CFA. */ | |
195 | #define DWARF2_CIE_DATA_ALIGNMENT -4 | |
196 | ||
197 | /* CFI hooks. */ | |
198 | #define tc_regname_to_dw2regnum tc_arm_regname_to_dw2regnum | |
199 | #define tc_cfi_frame_initial_instructions tc_arm_frame_initial_instructions | |
200 | ||
69b97547 NC |
201 | #else /* Not OBJ_ELF. */ |
202 | #define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_" | |
203 | #endif | |
204 | ||
205 | #if defined OBJ_ELF || defined OBJ_COFF | |
206 | ||
207 | # define EXTERN_FORCE_RELOC 1 | |
208 | # define tc_fix_adjustable(FIX) arm_fix_adjustable (FIX) | |
209 | /* Values passed to md_apply_fix3 don't include the symbol value. */ | |
210 | # define MD_APPLY_SYM_VALUE(FIX) 0 | |
211 | # define TC_VALIDATE_FIX(FIX, SEGTYPE, LABEL) arm_validate_fix (FIX) | |
212 | ||
213 | #endif | |
214 | ||
215 | extern void arm_frag_align_code (int, int); | |
216 | extern void arm_validate_fix (struct fix *); | |
217 | extern const char * elf32_arm_target_format (void); | |
218 | extern void arm_elf_change_section (void); | |
219 | extern int arm_force_relocation (struct fix *); | |
220 | extern void arm_cleanup (void); | |
221 | extern void arm_start_line_hook (void); | |
222 | extern void arm_frob_label (symbolS *); | |
223 | extern int arm_data_in_code (void); | |
224 | extern char * arm_canonicalize_symbol_name (char *); | |
225 | extern void arm_adjust_symtab (void); | |
226 | extern void armelf_frob_symbol (symbolS *, int *); | |
227 | extern void cons_fix_new_arm (fragS *, int, int, expressionS *); | |
228 | extern void arm_init_frag (struct frag *); | |
229 | extern void arm_handle_align (struct frag *); | |
230 | extern bfd_boolean arm_fix_adjustable (struct fix *); | |
40a18ebd | 231 | extern int arm_elf_section_type (const char *, size_t); |
a394c00f NC |
232 | extern int tc_arm_regname_to_dw2regnum (const char *regname); |
233 | extern void tc_arm_frame_initial_instructions (void); |