* scripttempl/avr.sc (MEMORY): Use DATA_ORIGIN.
[deliverable/binutils-gdb.git] / gas / config / tc-arm.h
CommitLineData
252b5132 1/* This file is tc-arm.h
aef6203b 2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
f31fef98 3 2004, 2005, 2006, 2007, 2008, 2009 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
ec2655a6 11 the Free Software Foundation; either version 3, or (at your option)
252b5132
RH
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. */
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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
252b5132
RH
35#define DIFF_EXPR_OK
36
37#ifdef LITTLE_ENDIAN
38#undef LITTLE_ENDIAN
39#endif
40
41#ifdef BIG_ENDIAN
42#undef BIG_ENDIAN
43#endif
44
45#define LITTLE_ENDIAN 1234
46#define BIG_ENDIAN 4321
47
a161fe53
AM
48struct fix;
49
69b97547
NC
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
252b5132 65# define ARM_BI_ENDIAN
252b5132 66# if defined TE_PE
69b97547
NC
67# if defined TE_EPOC
68# define TARGET_FORMAT (target_big_endian ? "epoc-pe-arm-big" : "epoc-pe-arm-little")
7148cc28
NC
69# elif defined TE_WINCE
70# define TARGET_FORMAT (target_big_endian ? "pe-arm-wince-big" : "pe-arm-wince-little")
69b97547
NC
71# else
72# define TARGET_FORMAT (target_big_endian ? "pe-arm-big" : "pe-arm-little")
73# endif
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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
0110f2b8
PB
84#define md_relax_frag(segment, fragp, stretch) \
85 arm_relax_frag(segment, fragp, stretch)
86extern int arm_relax_frag (asection *, struct frag *, long);
252b5132 87
a8bc6c78
PB
88#define md_optimize_expr(l,o,r) arm_optimize_expr (l, o, r)
89extern int arm_optimize_expr (expressionS *, operatorT, expressionS *);
90
252b5132 91#define md_cleanup() arm_cleanup ()
252b5132
RH
92
93#define md_start_line_hook() arm_start_line_hook ()
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RH
94
95#define tc_frob_label(S) arm_frob_label (S)
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RH
96
97/* We also need to mark assembler created symbols: */
98#define tc_frob_fake_label(S) arm_frob_label (S)
99
ee065d83
PB
100#ifdef OBJ_ELF
101#define md_end arm_md_end
102extern void arm_md_end (void);
e1da3f5b 103bfd_boolean arm_is_eabi (void);
ee065d83
PB
104#endif
105
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RH
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. */
109
adbaf948
ZW
110#define TC_FIX_TYPE int
111#define TC_INIT_FIX_DATA(FIX) ((FIX)->tc_fix_data = 0)
29c4c6b5 112
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RH
113/* We need to keep some local information on symbols. */
114
69b97547 115#define TC_SYMFIELD_TYPE unsigned int
174419c1
ILT
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))
252b5132
RH
119
120#define ARM_FLAG_THUMB (1 << 0) /* The symbol is a Thumb symbol rather than an Arm symbol. */
2d2255b5 121#define ARM_FLAG_INTERWORK (1 << 1) /* The symbol is attached to code that supports interworking. */
252b5132
RH
122#define THUMB_FLAG_FUNC (1 << 2) /* The symbol is attached to the start of a Thumb function. */
123
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)
e1da3f5b
PB
126#ifdef OBJ_ELF
127
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))
135
136#else
252b5132 137#define THUMB_IS_FUNC(s) (ARM_GET_FLAG (s) & THUMB_FLAG_FUNC)
e1da3f5b 138#endif
252b5132
RH
139
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))
143
794ba86a
DJ
144void 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
149
69b97547
NC
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 ()
252b5132
RH
153
154#define LISTING_HEADER "ARM GAS "
155
156#define OPTIONAL_REGISTER_PREFIX '%'
157
37f6032b
ZW
158#define LOCAL_LABEL(name) (name[0] == '.' && name[1] == 'L')
159#define LOCAL_LABELS_FB 1
252b5132 160
a161fe53
AM
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
252b5132
RH
166 pcrel, but it is easier to be safe than sorry. */
167
a161fe53
AM
168#define TC_FORCE_RELOCATION_LOCAL(FIX) \
169 (!(FIX)->fx_pcrel \
a161fe53
AM
170 || (FIX)->fx_r_type == BFD_RELOC_ARM_GOT32 \
171 || (FIX)->fx_r_type == BFD_RELOC_32 \
172 || TC_FORCE_RELOCATION (FIX))
252b5132 173
a8bc6c78
PB
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))
179
252b5132 180#define TC_CONS_FIX_NEW cons_fix_new_arm
16a0c2d4 181
d8708f40
NC
182#define MAX_MEM_FOR_RS_ALIGN_CODE 31
183
16a0c2d4
NC
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. */
69b97547 187#define TC_FRAG_TYPE int
16a0c2d4 188#define TC_FRAG_INIT(fragp) arm_init_frag (fragp)
69b97547 189#define HANDLE_ALIGN(fragp) arm_handle_align (fragp)
16a0c2d4
NC
190
191#define md_do_align(N, FILL, LEN, MAX, LABEL) \
192 if (FILL == NULL && (N) != 0 && ! need_pass_2 && subseg_text_p (now_seg)) \
193 { \
194 arm_frag_align_code (N, MAX); \
195 goto LABEL; \
196 }
69b97547 197
f0927246
NC
198#define DWARF2_LINE_MIN_INSN_LENGTH 2
199
200/* The lr register is r14. */
201#define DWARF2_DEFAULT_RETURN_COLUMN 14
202
203/* Registers are generally saved at negative offsets to the CFA. */
8d79fd44 204#define DWARF2_CIE_DATA_ALIGNMENT (-4)
f0927246 205
69b97547 206#ifdef OBJ_ELF
69b97547
NC
207# define obj_frob_symbol(sym, punt) armelf_frob_symbol ((sym), & (punt))
208# define md_elf_section_change_hook() arm_elf_change_section ()
40a18ebd 209# define md_elf_section_type(str, len) arm_elf_section_type (str, len)
69b97547 210# define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
84798bd6 211# define TC_SEGMENT_INFO_TYPE struct arm_segment_info_type
69b97547 212
e821645d
DJ
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)
218
69b97547
NC
219enum mstate
220{
221 MAP_UNDEFINED = 0, /* Must be zero, for seginfo in new sections. */
222 MAP_DATA,
223 MAP_ARM,
224 MAP_THUMB
225};
226
e821645d
DJ
227void mapping_state (enum mstate);
228
84798bd6
JB
229struct arm_segment_info_type
230{
231 enum mstate mapstate;
232 unsigned int marked_pr_dependency;
233};
234
a394c00f
NC
235/* We want .cfi_* pseudo-ops for generating unwind info. */
236#define TARGET_USE_CFIPOP 1
237
a394c00f
NC
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
241
69b97547
NC
242#else /* Not OBJ_ELF. */
243#define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_"
244#endif
245
246#if defined OBJ_ELF || defined OBJ_COFF
247
248# define EXTERN_FORCE_RELOC 1
249# define tc_fix_adjustable(FIX) arm_fix_adjustable (FIX)
55cf6793 250/* Values passed to md_apply_fix don't include the symbol value. */
69b97547 251# define MD_APPLY_SYM_VALUE(FIX) 0
4343666d 252#endif
69b97547 253
4343666d
RR
254#ifdef OBJ_COFF
255# define TC_VALIDATE_FIX(FIX, SEGTYPE, LABEL) arm_validate_fix (FIX)
69b97547
NC
256#endif
257
2fc8bdac
ZW
258#define MD_PCREL_FROM_SECTION(F,S) md_pcrel_from_section(F,S)
259
260extern long md_pcrel_from_section (struct fix *, segT);
69b97547
NC
261extern void arm_frag_align_code (int, int);
262extern void arm_validate_fix (struct fix *);
263extern const char * elf32_arm_target_format (void);
264extern void arm_elf_change_section (void);
265extern int arm_force_relocation (struct fix *);
266extern void arm_cleanup (void);
267extern void arm_start_line_hook (void);
268extern void arm_frob_label (symbolS *);
269extern int arm_data_in_code (void);
270extern char * arm_canonicalize_symbol_name (char *);
271extern void arm_adjust_symtab (void);
272extern void armelf_frob_symbol (symbolS *, int *);
273extern void cons_fix_new_arm (fragS *, int, int, expressionS *);
274extern void arm_init_frag (struct frag *);
275extern void arm_handle_align (struct frag *);
276extern bfd_boolean arm_fix_adjustable (struct fix *);
40a18ebd 277extern int arm_elf_section_type (const char *, size_t);
1df69f4f 278extern int tc_arm_regname_to_dw2regnum (char *regname);
a394c00f 279extern void tc_arm_frame_initial_instructions (void);
f0927246
NC
280
281#ifdef TE_PE
282
283#define O_secrel O_md1
284
285#define TC_DWARF2_EMIT_OFFSET tc_pe_dwarf2_emit_offset
286void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
287
288#endif /* TE_PE */
e04befd0 289
f31fef98 290#ifdef OBJ_ELF
e04befd0 291#define CONVERT_SYMBOLIC_ATTRIBUTE(name) arm_convert_symbolic_attribute (name)
f31fef98
NC
292extern int arm_convert_symbolic_attribute (const char *);
293#endif
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