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[binutils.git] / gas / config / tc-arm.h
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1 /* This file is tc-arm.h
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
4 Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org)
5 Modified by David Taylor (dtaylor@armltd.co.uk)
7 This file is part of GAS, the GNU Assembler.
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 3, or (at your option)
12 any later version.
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.
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, 51 Franklin Street - Fifth Floor, Boston, MA
22 02110-1301, USA. */
24 #define TC_ARM 1
26 #ifndef TARGET_BYTES_BIG_ENDIAN
27 #define TARGET_BYTES_BIG_ENDIAN 0
28 #endif
30 #define WORKING_DOT_WORD
32 #define COFF_MAGIC ARMMAGIC
33 #define TARGET_ARCH bfd_arch_arm
35 #define DIFF_EXPR_OK
37 #ifdef LITTLE_ENDIAN
38 #undef LITTLE_ENDIAN
39 #endif
41 #ifdef BIG_ENDIAN
42 #undef BIG_ENDIAN
43 #endif
45 #define LITTLE_ENDIAN 1234
46 #define BIG_ENDIAN 4321
48 struct fix;
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 (target_big_endian ? "a.out-arm-big" : "a.out-arm-little")
61 # endif
62 #elif defined OBJ_AIF
63 # define TARGET_FORMAT "aif"
64 #elif defined OBJ_COFF
65 # define ARM_BI_ENDIAN
66 # if defined TE_PE
67 # if defined TE_EPOC
68 # define TARGET_FORMAT (target_big_endian ? "epoc-pe-arm-big" : "epoc-pe-arm-little")
69 # elif defined TE_WINCE
70 # define TARGET_FORMAT (target_big_endian ? "pe-arm-wince-big" : "pe-arm-wince-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
82 #define TC_FORCE_RELOCATION(FIX) arm_force_relocation (FIX)
84 #define md_relax_frag(segment, fragp, stretch) \
85 arm_relax_frag(segment, fragp, stretch)
86 extern int arm_relax_frag (asection *, struct frag *, long);
88 #define md_optimize_expr(l,o,r) arm_optimize_expr (l, o, r)
89 extern int arm_optimize_expr (expressionS *, operatorT, expressionS *);
91 #define md_cleanup() arm_cleanup ()
93 #define md_start_line_hook() arm_start_line_hook ()
95 #define tc_frob_label(S) arm_frob_label (S)
97 /* We also need to mark assembler created symbols: */
98 #define tc_frob_fake_label(S) arm_frob_label (S)
100 #ifdef OBJ_ELF
101 #define md_end arm_md_end
102 extern void arm_md_end (void);
103 bfd_boolean arm_is_eabi (void);
104 #endif
106 /* NOTE: The fake label creation in stabs.c:s_stab_generic() has
107 deliberately not been updated to mark assembler created stabs
108 symbols as Thumb. */
110 #define TC_FIX_TYPE int
111 #define TC_INIT_FIX_DATA(FIX) ((FIX)->tc_fix_data = 0)
113 /* We need to keep some local information on symbols. */
115 #define TC_SYMFIELD_TYPE unsigned int
116 #define ARM_GET_FLAG(s) (*symbol_get_tc (s))
117 #define ARM_SET_FLAG(s,v) (*symbol_get_tc (s) |= (v))
118 #define ARM_RESET_FLAG(s,v) (*symbol_get_tc (s) &= ~(v))
120 #define ARM_FLAG_THUMB (1 << 0) /* The symbol is a Thumb symbol rather than an Arm symbol. */
121 #define ARM_FLAG_INTERWORK (1 << 1) /* The symbol is attached to code that supports interworking. */
122 #define THUMB_FLAG_FUNC (1 << 2) /* The symbol is attached to the start of a Thumb function. */
124 #define ARM_IS_THUMB(s) (ARM_GET_FLAG (s) & ARM_FLAG_THUMB)
125 #define ARM_IS_INTERWORK(s) (ARM_GET_FLAG (s) & ARM_FLAG_INTERWORK)
126 #ifdef OBJ_ELF
128 /* For ELF objects THUMB_IS_FUNC is inferred from
129 ARM_IS_TUMB and the function type. */
130 #define THUMB_IS_FUNC(s) \
131 ((arm_is_eabi () \
132 && (ARM_IS_THUMB (s)) \
133 && (symbol_get_bfdsym (s)->flags & BSF_FUNCTION)) \
134 || (ARM_GET_FLAG (s) & THUMB_FLAG_FUNC))
136 #else
137 #define THUMB_IS_FUNC(s) (ARM_GET_FLAG (s) & THUMB_FLAG_FUNC)
138 #endif
140 #define ARM_SET_THUMB(s,t) ((t) ? ARM_SET_FLAG (s, ARM_FLAG_THUMB) : ARM_RESET_FLAG (s, ARM_FLAG_THUMB))
141 #define ARM_SET_INTERWORK(s,t) ((t) ? ARM_SET_FLAG (s, ARM_FLAG_INTERWORK) : ARM_RESET_FLAG (s, ARM_FLAG_INTERWORK))
142 #define THUMB_SET_FUNC(s,t) ((t) ? ARM_SET_FLAG (s, THUMB_FLAG_FUNC) : ARM_RESET_FLAG (s, THUMB_FLAG_FUNC))
144 void arm_copy_symbol_attributes (symbolS *, symbolS *);
145 #ifndef TC_COPY_SYMBOL_ATTRIBUTES
146 #define TC_COPY_SYMBOL_ATTRIBUTES(DEST, SRC) \
147 (arm_copy_symbol_attributes (DEST, SRC))
148 #endif
150 #define TC_START_LABEL(C,STR) (c == ':' || (c == '/' && arm_data_in_code ()))
151 #define tc_canonicalize_symbol_name(str) arm_canonicalize_symbol_name (str);
152 #define obj_adjust_symtab() arm_adjust_symtab ()
154 #define LISTING_HEADER "ARM GAS "
156 #define OPTIONAL_REGISTER_PREFIX '%'
158 #define LOCAL_LABEL(name) (name[0] == '.' && name[1] == 'L')
159 #define LOCAL_LABELS_FB 1
161 /* This expression evaluates to true if the relocation is for a local
162 object for which we still want to do the relocation at runtime.
163 False if we are willing to perform this relocation while building
164 the .o file. GOTOFF does not need to be checked here because it is
165 not pcrel. I am not sure if some of the others are ever used with
166 pcrel, but it is easier to be safe than sorry. */
168 #define TC_FORCE_RELOCATION_LOCAL(FIX) \
169 (!(FIX)->fx_pcrel \
170 || (FIX)->fx_r_type == BFD_RELOC_ARM_GOT32 \
171 || (FIX)->fx_r_type == BFD_RELOC_32 \
172 || TC_FORCE_RELOCATION (FIX))
174 /* Force output of R_ARM_REL32 relocations against thumb function symbols.
175 This is needed to ensure the low bit is handled correctly. */
176 #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEG) \
177 (THUMB_IS_FUNC ((FIX)->fx_addsy) \
178 || !SEG_NORMAL (SEG))
180 #define TC_CONS_FIX_NEW cons_fix_new_arm
182 #define MAX_MEM_FOR_RS_ALIGN_CODE 31
184 /* For frags in code sections we need to record whether they contain
185 ARM code or THUMB code. This is that if they have to be aligned,
186 they can contain the correct type of no-op instruction. */
187 #define TC_FRAG_TYPE int
188 #define TC_FRAG_INIT(fragp) arm_init_frag (fragp)
189 #define HANDLE_ALIGN(fragp) arm_handle_align (fragp)
191 #define md_do_align(N, FILL, LEN, MAX, LABEL) \
192 if (FILL == NULL && (N) != 0 && ! need_pass_2 && subseg_text_p (now_seg)) \
194 arm_frag_align_code (N, MAX); \
195 goto LABEL; \
198 #define DWARF2_LINE_MIN_INSN_LENGTH 2
200 /* The lr register is r14. */
201 #define DWARF2_DEFAULT_RETURN_COLUMN 14
203 /* Registers are generally saved at negative offsets to the CFA. */
204 #define DWARF2_CIE_DATA_ALIGNMENT (-4)
206 #ifdef OBJ_ELF
207 # define obj_frob_symbol(sym, punt) armelf_frob_symbol ((sym), & (punt))
208 # define md_elf_section_change_hook() arm_elf_change_section ()
209 # define md_elf_section_type(str, len) arm_elf_section_type (str, len)
210 # define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
211 # define TC_SEGMENT_INFO_TYPE struct arm_segment_info_type
213 /* This is not really an alignment operation, but it's something we
214 need to do at the same time: whenever we are figuring out the
215 alignment for data, we should check whether a $d symbol is
216 necessary. */
217 # define md_cons_align(nbytes) mapping_state (MAP_DATA)
219 enum mstate
221 MAP_UNDEFINED = 0, /* Must be zero, for seginfo in new sections. */
222 MAP_DATA,
223 MAP_ARM,
224 MAP_THUMB
227 void mapping_state (enum mstate);
229 struct arm_segment_info_type
231 enum mstate mapstate;
232 unsigned int marked_pr_dependency;
235 /* We want .cfi_* pseudo-ops for generating unwind info. */
236 #define TARGET_USE_CFIPOP 1
238 /* CFI hooks. */
239 #define tc_regname_to_dw2regnum tc_arm_regname_to_dw2regnum
240 #define tc_cfi_frame_initial_instructions tc_arm_frame_initial_instructions
242 #else /* Not OBJ_ELF. */
243 #define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_"
244 #endif
246 #if defined OBJ_ELF || defined OBJ_COFF
248 # define EXTERN_FORCE_RELOC 1
249 # define tc_fix_adjustable(FIX) arm_fix_adjustable (FIX)
250 /* Values passed to md_apply_fix don't include the symbol value. */
251 # define MD_APPLY_SYM_VALUE(FIX) 0
252 # define TC_VALIDATE_FIX(FIX, SEGTYPE, LABEL) arm_validate_fix (FIX)
254 #endif
256 #define MD_PCREL_FROM_SECTION(F,S) md_pcrel_from_section(F,S)
258 extern long md_pcrel_from_section (struct fix *, segT);
259 extern void arm_frag_align_code (int, int);
260 extern void arm_validate_fix (struct fix *);
261 extern const char * elf32_arm_target_format (void);
262 extern void arm_elf_change_section (void);
263 extern int arm_force_relocation (struct fix *);
264 extern void arm_cleanup (void);
265 extern void arm_start_line_hook (void);
266 extern void arm_frob_label (symbolS *);
267 extern int arm_data_in_code (void);
268 extern char * arm_canonicalize_symbol_name (char *);
269 extern void arm_adjust_symtab (void);
270 extern void armelf_frob_symbol (symbolS *, int *);
271 extern void cons_fix_new_arm (fragS *, int, int, expressionS *);
272 extern void arm_init_frag (struct frag *);
273 extern void arm_handle_align (struct frag *);
274 extern bfd_boolean arm_fix_adjustable (struct fix *);
275 extern int arm_elf_section_type (const char *, size_t);
276 extern int tc_arm_regname_to_dw2regnum (char *regname);
277 extern void tc_arm_frame_initial_instructions (void);
279 #ifdef TE_PE
281 #define O_secrel O_md1
283 #define TC_DWARF2_EMIT_OFFSET tc_pe_dwarf2_emit_offset
284 void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
286 #endif /* TE_PE */