1 /* This file is tc-arm.h
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008, 2009, 2012 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)
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
26 #ifndef TARGET_BYTES_BIG_ENDIAN
27 #define TARGET_BYTES_BIG_ENDIAN 0
30 #define WORKING_DOT_WORD
32 #define COFF_MAGIC ARMMAGIC
33 #define TARGET_ARCH bfd_arch_arm
45 #define LITTLE_ENDIAN 1234
46 #define BIG_ENDIAN 4321
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"
59 # define ARM_BI_ENDIAN
60 # define TARGET_FORMAT (target_big_endian ? "a.out-arm-big" : "a.out-arm-little")
63 # define TARGET_FORMAT "aif"
64 #elif defined OBJ_COFF
65 # define ARM_BI_ENDIAN
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")
72 # define TARGET_FORMAT (target_big_endian ? "pe-arm-big" : "pe-arm-little")
75 # define TARGET_FORMAT (target_big_endian ? "coff-arm-big" : "coff-arm-little")
78 # define ARM_BI_ENDIAN
79 # define TARGET_FORMAT elf32_arm_target_format ()
82 /* We support double slash line-comments for compatibility with the ARM AArch64 Assembler. */
83 #define DOUBLESLASH_LINE_COMMENTS
85 #define TC_FORCE_RELOCATION(FIX) arm_force_relocation (FIX)
87 extern unsigned int arm_frag_max_var (struct frag
*);
88 #define md_frag_max_var arm_frag_max_var
90 #define md_relax_frag(segment, fragp, stretch) \
91 arm_relax_frag (segment, fragp, stretch)
92 extern int arm_relax_frag (asection
*, struct frag
*, long);
94 #define md_optimize_expr(l,o,r) arm_optimize_expr (l, o, r)
95 extern int arm_optimize_expr (expressionS
*, operatorT
, expressionS
*);
97 #define md_cleanup() arm_cleanup ()
99 #define md_start_line_hook() arm_start_line_hook ()
101 #define tc_frob_label(S) arm_frob_label (S)
103 /* We also need to mark assembler created symbols: */
104 #define tc_frob_fake_label(S) arm_frob_label (S)
107 #define md_end arm_md_end
108 extern void arm_md_end (void);
109 bfd_boolean
arm_is_eabi (void);
112 /* NOTE: The fake label creation in stabs.c:s_stab_generic() has
113 deliberately not been updated to mark assembler created stabs
116 #define TC_FIX_TYPE int
117 #define TC_INIT_FIX_DATA(FIX) ((FIX)->tc_fix_data = 0)
119 /* We need to keep some local information on symbols. */
121 #define TC_SYMFIELD_TYPE unsigned int
122 #define ARM_GET_FLAG(s) (*symbol_get_tc (s))
123 #define ARM_SET_FLAG(s,v) (*symbol_get_tc (s) |= (v))
124 #define ARM_RESET_FLAG(s,v) (*symbol_get_tc (s) &= ~(v))
126 #define ARM_FLAG_THUMB (1 << 0) /* The symbol is a Thumb symbol rather than an Arm symbol. */
127 #define ARM_FLAG_INTERWORK (1 << 1) /* The symbol is attached to code that supports interworking. */
128 #define THUMB_FLAG_FUNC (1 << 2) /* The symbol is attached to the start of a Thumb function. */
130 #define ARM_IS_THUMB(s) (ARM_GET_FLAG (s) & ARM_FLAG_THUMB)
131 #define ARM_IS_INTERWORK(s) (ARM_GET_FLAG (s) & ARM_FLAG_INTERWORK)
135 /* For ELF objects THUMB_IS_FUNC is inferred from
136 ARM_IS_THUMB and the function type. */
137 #define THUMB_IS_FUNC(s) \
139 && ((arm_is_eabi () \
140 && (ARM_IS_THUMB (s)) \
141 && (symbol_get_bfdsym (s)->flags & BSF_FUNCTION)) \
142 || (ARM_GET_FLAG (s) & THUMB_FLAG_FUNC)))
144 #define ARM_IS_FUNC(s) \
147 && !(ARM_IS_THUMB (s)) \
148 /* && !(THUMB_FLAG_FUNC & ARM_GET_FLAG (s)) \ */ \
149 && (symbol_get_bfdsym (s)->flags & BSF_FUNCTION)))
154 #define THUMB_IS_FUNC(s) ((s) && ARM_GET_FLAG (s) & THUMB_FLAG_FUNC)
155 #define ARM_IS_FUNC(s) (!THUMB_IS_FUNC (s) \
156 && (s) && (symbol_get_bfdsym (s)->flags & BSF_FUNCTION))
159 #define ARM_SET_THUMB(s,t) ((t) ? ARM_SET_FLAG (s, ARM_FLAG_THUMB) : ARM_RESET_FLAG (s, ARM_FLAG_THUMB))
160 #define ARM_SET_INTERWORK(s,t) ((t) ? ARM_SET_FLAG (s, ARM_FLAG_INTERWORK) : ARM_RESET_FLAG (s, ARM_FLAG_INTERWORK))
161 #define THUMB_SET_FUNC(s,t) ((t) ? ARM_SET_FLAG (s, THUMB_FLAG_FUNC) : ARM_RESET_FLAG (s, THUMB_FLAG_FUNC))
163 void arm_copy_symbol_attributes (symbolS
*, symbolS
*);
165 #ifndef TC_COPY_SYMBOL_ATTRIBUTES
166 #define TC_COPY_SYMBOL_ATTRIBUTES(DEST, SRC) \
167 (arm_copy_symbol_attributes (DEST, SRC))
170 #define TC_START_LABEL(C,S,STR) (C == ':' || (C == '/' && arm_data_in_code ()))
171 #define tc_canonicalize_symbol_name(str) arm_canonicalize_symbol_name (str);
172 #define obj_adjust_symtab() arm_adjust_symtab ()
174 #define LISTING_HEADER "ARM GAS "
176 #define OPTIONAL_REGISTER_PREFIX '%'
178 #define LOCAL_LABEL(name) (name[0] == '.' && name[1] == 'L')
179 #define LOCAL_LABELS_FB 1
181 /* This expression evaluates to true if the relocation is for a local
182 object for which we still want to do the relocation at runtime.
183 False if we are willing to perform this relocation while building
184 the .o file. GOTOFF does not need to be checked here because it is
185 not pcrel. I am not sure if some of the others are ever used with
186 pcrel, but it is easier to be safe than sorry. */
188 #define TC_FORCE_RELOCATION_LOCAL(FIX) \
190 || (FIX)->fx_r_type == BFD_RELOC_ARM_GOT32 \
191 || (FIX)->fx_r_type == BFD_RELOC_32 \
192 || ((FIX)->fx_addsy != NULL && S_IS_WEAK ((FIX)->fx_addsy)) \
193 || TC_FORCE_RELOCATION (FIX))
195 /* Force output of R_ARM_REL32 relocations against thumb function symbols.
196 This is needed to ensure the low bit is handled correctly. */
197 #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEG) \
198 (THUMB_IS_FUNC ((FIX)->fx_addsy) \
199 || !SEG_NORMAL (SEG))
201 #define TC_FORCE_RELOCATION_ABS(FIX) \
203 && (FIX)->fx_r_type != BFD_RELOC_32 \
204 && (FIX)->fx_r_type != BFD_RELOC_ARM_GOT32) \
205 || TC_FORCE_RELOCATION(FIX))
207 #define TC_CONS_FIX_NEW cons_fix_new_arm
209 #define MAX_MEM_ALIGNMENT_BYTES 6
210 #define MAX_MEM_FOR_RS_ALIGN_CODE ((1 << MAX_MEM_ALIGNMENT_BYTES) - 1)
212 /* For frags in code sections we need to record whether they contain
213 ARM code or THUMB code. This is that if they have to be aligned,
214 they can contain the correct type of no-op instruction. */
219 /* If there is a mapping symbol at offset 0 in this frag,
220 it will be saved in FIRST_MAP. If there are any mapping
221 symbols in this frag, the last one will be saved in
223 symbolS
*first_map
, *last_map
;
227 #define TC_FRAG_TYPE struct arm_frag_type
228 /* NOTE: max_chars is a local variable from frag_var / frag_variant. */
229 #define TC_FRAG_INIT(fragp) arm_init_frag (fragp, max_chars)
230 #define HANDLE_ALIGN(fragp) arm_handle_align (fragp)
232 #define md_do_align(N, FILL, LEN, MAX, LABEL) \
233 if (FILL == NULL && (N) != 0 && ! need_pass_2 && subseg_text_p (now_seg)) \
235 arm_frag_align_code (N, MAX); \
239 #define DWARF2_LINE_MIN_INSN_LENGTH 2
241 /* The lr register is r14. */
242 #define DWARF2_DEFAULT_RETURN_COLUMN 14
244 /* Registers are generally saved at negative offsets to the CFA. */
245 #define DWARF2_CIE_DATA_ALIGNMENT (-4)
247 /* State variables for IT block handling. */
250 OUTSIDE_IT_BLOCK
, MANUAL_IT_BLOCK
, AUTOMATIC_IT_BLOCK
265 # define obj_frob_symbol(sym, punt) armelf_frob_symbol ((sym), & (punt))
266 # define md_elf_section_change_hook() arm_elf_change_section ()
267 # define md_elf_section_type(str, len) arm_elf_section_type (str, len)
268 # define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
269 # define TC_SEGMENT_INFO_TYPE struct arm_segment_info_type
271 /* This is not really an alignment operation, but it's something we
272 need to do at the same time: whenever we are figuring out the
273 alignment for data, we should check whether a $d symbol is
275 # define md_cons_align(nbytes) mapping_state (MAP_DATA)
279 MAP_UNDEFINED
= 0, /* Must be zero, for seginfo in new sections. */
285 void mapping_state (enum mstate
);
287 struct arm_segment_info_type
289 enum mstate mapstate
;
291 /* Bit N indicates that an R_ARM_NONE relocation has been output for
292 __aeabi_unwind_cpp_prN already if set. This enables dependencies to be
293 emitted only once per section, to save unnecessary bloat. */
294 unsigned int marked_pr_dependency
;
296 struct current_it current_it
;
299 /* We want .cfi_* pseudo-ops for generating unwind info. */
300 #define TARGET_USE_CFIPOP 1
303 #define tc_regname_to_dw2regnum tc_arm_regname_to_dw2regnum
304 #define tc_cfi_frame_initial_instructions tc_arm_frame_initial_instructions
306 #else /* Not OBJ_ELF. */
307 #define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_"
310 #if defined OBJ_ELF || defined OBJ_COFF
312 # define EXTERN_FORCE_RELOC 1
313 # define tc_fix_adjustable(FIX) arm_fix_adjustable (FIX)
317 /* Values passed to md_apply_fix don't include the symbol value. */
318 # define MD_APPLY_SYM_VALUE(FIX) arm_apply_sym_value (FIX)
322 # define TC_VALIDATE_FIX(FIX, SEGTYPE, LABEL) arm_validate_fix (FIX)
323 /* Values passed to md_apply_fix don't include the symbol value. */
324 # define MD_APPLY_SYM_VALUE(FIX) 0
327 #define MD_PCREL_FROM_SECTION(F,S) md_pcrel_from_section(F,S)
329 extern long md_pcrel_from_section (struct fix
*, segT
);
330 extern void arm_frag_align_code (int, int);
331 extern void arm_validate_fix (struct fix
*);
332 extern const char * elf32_arm_target_format (void);
333 extern void arm_elf_change_section (void);
334 extern int arm_force_relocation (struct fix
*);
335 extern void arm_cleanup (void);
336 extern void arm_start_line_hook (void);
337 extern void arm_frob_label (symbolS
*);
338 extern int arm_data_in_code (void);
339 extern char * arm_canonicalize_symbol_name (char *);
340 extern void arm_adjust_symtab (void);
341 extern void armelf_frob_symbol (symbolS
*, int *);
342 extern void cons_fix_new_arm (fragS
*, int, int, expressionS
*);
343 extern void arm_init_frag (struct frag
*, int);
344 extern void arm_handle_align (struct frag
*);
345 extern bfd_boolean
arm_fix_adjustable (struct fix
*);
346 extern int arm_elf_section_type (const char *, size_t);
347 extern int tc_arm_regname_to_dw2regnum (char *regname
);
348 extern void tc_arm_frame_initial_instructions (void);
352 #define O_secrel O_md1
354 #define TC_DWARF2_EMIT_OFFSET tc_pe_dwarf2_emit_offset
355 void tc_pe_dwarf2_emit_offset (symbolS
*, unsigned int);
360 #define CONVERT_SYMBOLIC_ATTRIBUTE(name) arm_convert_symbolic_attribute (name)
361 extern int arm_convert_symbolic_attribute (const char *);
362 extern int arm_apply_sym_value (struct fix
*);
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