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[/] [openrisc/] [trunk/] [gnu-src/] [binutils-2.18.50/] [gas/] [config/] [tc-arm.h] - Blame information for rev 156

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/* This file is tc-arm.h
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   Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
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   2004, 2005, 2006, 2007 Free Software Foundation, Inc.
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   Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org)
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        Modified by David Taylor (dtaylor@armltd.co.uk)
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   This file is part of GAS, the GNU Assembler.
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   GAS is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 3, or (at your option)
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   any later version.
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   GAS is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with GAS; see the file COPYING.  If not, write to the Free
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   Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
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   02110-1301, USA.  */
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#define TC_ARM 1
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#ifndef TARGET_BYTES_BIG_ENDIAN
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#define TARGET_BYTES_BIG_ENDIAN 0
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#endif
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#define WORKING_DOT_WORD
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#define COFF_MAGIC      ARMMAGIC
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#define TARGET_ARCH     bfd_arch_arm
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#define DIFF_EXPR_OK
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#ifdef  LITTLE_ENDIAN
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#undef  LITTLE_ENDIAN
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#endif
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#ifdef  BIG_ENDIAN
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#undef  BIG_ENDIAN
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#endif
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#define LITTLE_ENDIAN   1234
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#define BIG_ENDIAN      4321
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struct fix;
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#if defined OBJ_AOUT
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# if defined TE_RISCIX
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#  define TARGET_FORMAT "a.out-riscix"
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# elif defined TE_LINUX
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#  define ARM_BI_ENDIAN
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#  define TARGET_FORMAT "a.out-arm-linux"
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# elif defined TE_NetBSD
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#  define TARGET_FORMAT "a.out-arm-netbsd"
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# else
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#  define ARM_BI_ENDIAN
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#  define TARGET_FORMAT (target_big_endian ? "a.out-arm-big" : "a.out-arm-little")
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# endif
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#elif defined OBJ_AIF
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# define TARGET_FORMAT "aif"
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#elif defined OBJ_COFF
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# define ARM_BI_ENDIAN
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# if defined TE_PE
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#  if defined TE_EPOC
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#   define TARGET_FORMAT (target_big_endian ? "epoc-pe-arm-big" : "epoc-pe-arm-little")
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#  elif defined TE_WINCE
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#   define TARGET_FORMAT (target_big_endian ? "pe-arm-wince-big" : "pe-arm-wince-little")
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#  else
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#   define TARGET_FORMAT (target_big_endian ? "pe-arm-big" : "pe-arm-little")
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#  endif
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# else
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#  define TARGET_FORMAT (target_big_endian ? "coff-arm-big" : "coff-arm-little")
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# endif
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#elif defined OBJ_ELF
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# define ARM_BI_ENDIAN
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# define TARGET_FORMAT  elf32_arm_target_format ()
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#endif
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#define TC_FORCE_RELOCATION(FIX) arm_force_relocation (FIX)
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#define md_relax_frag(segment, fragp, stretch) \
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  arm_relax_frag(segment, fragp, stretch)
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extern int arm_relax_frag (asection *, struct frag *, long);
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#define md_optimize_expr(l,o,r)         arm_optimize_expr (l, o, r)
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extern int arm_optimize_expr (expressionS *, operatorT, expressionS *);
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#define md_cleanup() arm_cleanup ()
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#define md_start_line_hook() arm_start_line_hook ()
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#define tc_frob_label(S) arm_frob_label (S)
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/* We also need to mark assembler created symbols:  */
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#define tc_frob_fake_label(S) arm_frob_label (S)
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#ifdef OBJ_ELF
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#define md_end arm_md_end
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extern void arm_md_end (void);
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bfd_boolean arm_is_eabi (void);
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#endif
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/* NOTE: The fake label creation in stabs.c:s_stab_generic() has
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   deliberately not been updated to mark assembler created stabs
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   symbols as Thumb.  */
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#define TC_FIX_TYPE int
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#define TC_INIT_FIX_DATA(FIX) ((FIX)->tc_fix_data = 0)
112
 
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/* We need to keep some local information on symbols.  */
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#define TC_SYMFIELD_TYPE        unsigned int
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#define ARM_GET_FLAG(s)         (*symbol_get_tc (s))
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#define ARM_SET_FLAG(s,v)       (*symbol_get_tc (s) |= (v))
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#define ARM_RESET_FLAG(s,v)     (*symbol_get_tc (s) &= ~(v))
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#define ARM_FLAG_THUMB          (1 << 0)        /* The symbol is a Thumb symbol rather than an Arm symbol.  */
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#define ARM_FLAG_INTERWORK      (1 << 1)        /* The symbol is attached to code that supports interworking.  */
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#define THUMB_FLAG_FUNC         (1 << 2)        /* The symbol is attached to the start of a Thumb function.  */
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#define ARM_IS_THUMB(s)         (ARM_GET_FLAG (s) & ARM_FLAG_THUMB)
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#define ARM_IS_INTERWORK(s)     (ARM_GET_FLAG (s) & ARM_FLAG_INTERWORK)
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 () \
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    && (ARM_IS_THUMB (s)) \
133
    && (symbol_get_bfdsym (s)->flags & BSF_FUNCTION)) \
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   || (ARM_GET_FLAG (s) & THUMB_FLAG_FUNC))
135
 
136
#else
137
#define THUMB_IS_FUNC(s)        (ARM_GET_FLAG (s) & THUMB_FLAG_FUNC)
138
#endif
139
 
140
#define ARM_SET_THUMB(s,t)      ((t) ? ARM_SET_FLAG (s, ARM_FLAG_THUMB)     : ARM_RESET_FLAG (s, ARM_FLAG_THUMB))
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#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
 
144
void arm_copy_symbol_attributes (symbolS *, symbolS *);
145
#ifndef TC_COPY_SYMBOL_ATTRIBUTES
146
#define TC_COPY_SYMBOL_ATTRIBUTES(DEST, SRC) \
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  (arm_copy_symbol_attributes (DEST, SRC))
148
#endif
149
 
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 ()
153
 
154
#define LISTING_HEADER "ARM GAS "
155
 
156
#define OPTIONAL_REGISTER_PREFIX '%'
157
 
158
#define LOCAL_LABEL(name)  (name[0] == '.' && name[1] == 'L')
159
#define LOCAL_LABELS_FB    1
160
 
161
/* This expression evaluates to true if the relocation is for a local
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   object for which we still want to do the relocation at runtime.
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   False if we are willing to perform this relocation while building
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   the .o file.  GOTOFF does not need to be checked here because it is
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   not pcrel.  I am not sure if some of the others are ever used with
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   pcrel, but it is easier to be safe than sorry.  */
167
 
168
#define TC_FORCE_RELOCATION_LOCAL(FIX)                  \
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  (!(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))
173
 
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)  \
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  (THUMB_IS_FUNC ((FIX)->fx_addsy)              \
178
   || !SEG_NORMAL (SEG))
179
 
180
#define TC_CONS_FIX_NEW cons_fix_new_arm
181
 
182
#define MAX_MEM_FOR_RS_ALIGN_CODE 31
183
 
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,
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   they can contain the correct type of no-op instruction.  */
187
#define TC_FRAG_TYPE            int
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#define TC_FRAG_INIT(fragp)     arm_init_frag (fragp)
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#define HANDLE_ALIGN(fragp)     arm_handle_align (fragp)
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#define md_do_align(N, FILL, LEN, MAX, LABEL)                                   \
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  if (FILL == NULL && (N) != 0 && ! need_pass_2 && subseg_text_p (now_seg))      \
193
    {                                                                           \
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      arm_frag_align_code (N, MAX);                                             \
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      goto LABEL;                                                               \
196
    }
197
 
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.  */
204
#define DWARF2_CIE_DATA_ALIGNMENT     (-4)
205
 
206
#ifdef OBJ_ELF
207
# define obj_frob_symbol(sym, punt)     armelf_frob_symbol ((sym), & (punt))
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# define md_elf_section_change_hook()   arm_elf_change_section ()
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# define md_elf_section_type(str, len)  arm_elf_section_type (str, len)
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# define GLOBAL_OFFSET_TABLE_NAME       "_GLOBAL_OFFSET_TABLE_"
211
# define TC_SEGMENT_INFO_TYPE           struct arm_segment_info_type
212
 
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
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   alignment for data, we should check whether a $d symbol is
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   necessary.  */
217
# define md_cons_align(nbytes)          mapping_state (MAP_DATA)
218
 
219
enum mstate
220
{
221
  MAP_UNDEFINED = 0, /* Must be zero, for seginfo in new sections.  */
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  MAP_DATA,
223
  MAP_ARM,
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  MAP_THUMB
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};
226
 
227
void mapping_state (enum mstate);
228
 
229
struct arm_segment_info_type
230
{
231
  enum mstate mapstate;
232
  unsigned int marked_pr_dependency;
233
};
234
 
235
/* We want .cfi_* pseudo-ops for generating unwind info.  */
236
#define TARGET_USE_CFIPOP              1
237
 
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
 
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)
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)
253
 
254
#endif
255
 
256
#define MD_PCREL_FROM_SECTION(F,S) md_pcrel_from_section(F,S)
257
 
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);
278
 
279
#ifdef TE_PE
280
 
281
#define O_secrel O_md1
282
 
283
#define TC_DWARF2_EMIT_OFFSET  tc_pe_dwarf2_emit_offset
284
void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
285
 
286
#endif /* TE_PE */

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