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RT-AC56 3.0.0.4.374.37 core
[tomato.git] / release / src-rt-6.x.4708 / toolchains / hndtools-arm-linux-2.6.36-uclibc-4.5.3 / lib / gcc / arm-brcm-linux-uclibcgnueabi / 4.5.3 / plugin / include / config / elfos.h
blob6818f6600fe2069dcf7878d357b1513c3eb9cbfb
1 /* elfos.h -- operating system specific defines to be used when
2 targeting GCC for some generic ELF system
3 Copyright (C) 1991, 1994, 1995, 1999, 2000, 2001, 2002, 2003, 2004,
4 2007, 2009, 2010 Free Software Foundation, Inc.
5 Based on svr4.h contributed by Ron Guilmette (rfg@netcom.com).
6
7 This file is part of GCC.
8
9 GCC 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.
13
14 GCC 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 Under Section 7 of GPL version 3, you are granted additional
20 permissions described in the GCC Runtime Library Exception, version
21 3.1, as published by the Free Software Foundation.
22
23 You should have received a copy of the GNU General Public License and
24 a copy of the GCC Runtime Library Exception along with this program;
25 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
26 <http://www.gnu.org/licenses/>. */
27
28 #define TARGET_OBJFMT_CPP_BUILTINS() \
29 do \
30 { \
31 builtin_define ("__ELF__"); \
32 } \
33 while (0)
34
35 /* Define a symbol indicating that we are using elfos.h.
36 Some CPU specific configuration files use this. */
37 #define USING_ELFOS_H
38
39 /* The prefix to add to user-visible assembler symbols.
40
41 For ELF systems the convention is *not* to prepend a leading
42 underscore onto user-level symbol names. */
43
44 #undef USER_LABEL_PREFIX
45 #define USER_LABEL_PREFIX ""
46
47 /* The biggest alignment supported by ELF in bits. 32-bit ELF
48 supports section alignment up to (0x80000000 * 8), while
49 64-bit ELF supports (0x8000000000000000 * 8). If this macro
50 is not defined, the default is the largest alignment supported
51 by 32-bit ELF and representable on a 32-bit host. Use this
52 macro to limit the alignment which can be specified using
53 the `__attribute__ ((aligned (N)))' construct. */
54 #ifndef MAX_OFILE_ALIGNMENT
55 #define MAX_OFILE_ALIGNMENT (((unsigned int) 1 << 28) * 8)
56 #endif
57
58 /* Use periods rather than dollar signs in special g++ assembler names. */
59
60 #define NO_DOLLAR_IN_LABEL
61
62 /* Writing `int' for a bit-field forces int alignment for the structure. */
63
64 #ifndef PCC_BITFIELD_TYPE_MATTERS
65 #define PCC_BITFIELD_TYPE_MATTERS 1
66 #endif
67
68 /* Handle #pragma weak and #pragma pack. */
69
70 #define HANDLE_SYSV_PRAGMA 1
71
72 /* All ELF targets can support DWARF-2. */
73
74 #define DWARF2_DEBUGGING_INFO 1
75
76 /* The GNU tools operate better with dwarf2, and it is required by some
77 psABI's. Since we don't have any native tools to be compatible with,
78 default to dwarf2. */
79
80 #ifndef PREFERRED_DEBUGGING_TYPE
81 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
82 #endif
83
84 /* All SVR4 targets use the ELF object file format. */
85 #define OBJECT_FORMAT_ELF
86
87
88 /* Output #ident as a .ident. */
89
90 #define ASM_OUTPUT_IDENT(FILE, NAME) \
91 fprintf (FILE, "%s\"%s\"\n", IDENT_ASM_OP, NAME);
92
93 #define IDENT_ASM_OP "\t.ident\t"
94
95 #undef SET_ASM_OP
96 #define SET_ASM_OP "\t.set\t"
97
98 /* Most svr4 assemblers want a .file directive at the beginning of
99 their input file. */
100 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE true
101
102 /* This is how to allocate empty space in some section. The .zero
103 pseudo-op is used for this on most svr4 assemblers. */
104
105 #define SKIP_ASM_OP "\t.zero\t"
106
107 #undef ASM_OUTPUT_SKIP
108 #define ASM_OUTPUT_SKIP(FILE, SIZE) \
109 fprintf ((FILE), "%s"HOST_WIDE_INT_PRINT_UNSIGNED"\n",\
110 SKIP_ASM_OP, (SIZE))
111
112 /* This is how to store into the string LABEL
113 the symbol_ref name of an internal numbered label where
114 PREFIX is the class of label and NUM is the number within the class.
115 This is suitable for output with `assemble_name'.
116
117 For most svr4 systems, the convention is that any symbol which begins
118 with a period is not put into the linker symbol table by the assembler. */
119
120 #undef ASM_GENERATE_INTERNAL_LABEL
121 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
122 do \
123 { \
124 sprintf (LABEL, "*.%s%u", PREFIX, (unsigned) (NUM)); \
125 } \
126 while (0)
127
128 /* Output the label which precedes a jumptable. Note that for all svr4
129 systems where we actually generate jumptables (which is to say every
130 svr4 target except i386, where we use casesi instead) we put the jump-
131 tables into the .rodata section and since other stuff could have been
132 put into the .rodata section prior to any given jumptable, we have to
133 make sure that the location counter for the .rodata section gets pro-
134 perly re-aligned prior to the actual beginning of the jump table. */
135
136 #undef ALIGN_ASM_OP
137 #define ALIGN_ASM_OP "\t.align\t"
138
139 #ifndef ASM_OUTPUT_BEFORE_CASE_LABEL
140 #define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE, PREFIX, NUM, TABLE) \
141 ASM_OUTPUT_ALIGN ((FILE), 2);
142 #endif
143
144 #undef ASM_OUTPUT_CASE_LABEL
145 #define ASM_OUTPUT_CASE_LABEL(FILE, PREFIX, NUM, JUMPTABLE) \
146 do \
147 { \
148 ASM_OUTPUT_BEFORE_CASE_LABEL (FILE, PREFIX, NUM, JUMPTABLE) \
149 (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM); \
150 } \
151 while (0)
152
153 /* The standard SVR4 assembler seems to require that certain builtin
154 library routines (e.g. .udiv) be explicitly declared as .globl
155 in each assembly file where they are referenced. */
156
157 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
158 (*targetm.asm_out.globalize_label) (FILE, XSTR (FUN, 0))
159
160 /* This says how to output assembler code to declare an
161 uninitialized external linkage data object. Under SVR4,
162 the linker seems to want the alignment of data objects
163 to depend on their types. We do exactly that here. */
164
165 #define COMMON_ASM_OP "\t.comm\t"
166
167 #undef ASM_OUTPUT_ALIGNED_COMMON
168 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
169 do \
170 { \
171 fprintf ((FILE), "%s", COMMON_ASM_OP); \
172 assemble_name ((FILE), (NAME)); \
173 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", \
174 (SIZE), (ALIGN) / BITS_PER_UNIT); \
175 } \
176 while (0)
177
178 /* This says how to output assembler code to declare an
179 uninitialized internal linkage data object. Under SVR4,
180 the linker seems to want the alignment of data objects
181 to depend on their types. We do exactly that here. */
182
183 #define LOCAL_ASM_OP "\t.local\t"
184
185 #undef ASM_OUTPUT_ALIGNED_LOCAL
186 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
187 do \
188 { \
189 fprintf ((FILE), "%s", LOCAL_ASM_OP); \
190 assemble_name ((FILE), (NAME)); \
191 fprintf ((FILE), "\n"); \
192 ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN); \
193 } \
194 while (0)
195
196 /* This is the pseudo-op used to generate a contiguous sequence of byte
197 values from a double-quoted string WITHOUT HAVING A TERMINATING NUL
198 AUTOMATICALLY APPENDED. This is the same for most svr4 assemblers. */
199
200 #undef ASCII_DATA_ASM_OP
201 #define ASCII_DATA_ASM_OP "\t.ascii\t"
202
203 /* Support a read-only data section. */
204 #define READONLY_DATA_SECTION_ASM_OP "\t.section\t.rodata"
205
206 /* On svr4, we *do* have support for the .init and .fini sections, and we
207 can put stuff in there to be executed before and after `main'. We let
208 crtstuff.c and other files know this by defining the following symbols.
209 The definitions say how to change sections to the .init and .fini
210 sections. This is the same for all known svr4 assemblers. */
211
212 #define INIT_SECTION_ASM_OP "\t.section\t.init"
213 #define FINI_SECTION_ASM_OP "\t.section\t.fini"
214
215 /* Output assembly directive to move to the beginning of current section. */
216 #ifdef HAVE_GAS_SUBSECTION_ORDERING
217 # define ASM_SECTION_START_OP "\t.subsection\t-1"
218 # define ASM_OUTPUT_SECTION_START(FILE) \
219 fprintf ((FILE), "%s\n", ASM_SECTION_START_OP)
220 #endif
221
222 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
223
224 /* Switch into a generic section. */
225 #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
226
227 #undef TARGET_ASM_SELECT_RTX_SECTION
228 #define TARGET_ASM_SELECT_RTX_SECTION default_elf_select_rtx_section
229 #undef TARGET_ASM_SELECT_SECTION
230 #define TARGET_ASM_SELECT_SECTION default_elf_select_section
231 #undef TARGET_HAVE_SWITCHABLE_BSS_SECTIONS
232 #define TARGET_HAVE_SWITCHABLE_BSS_SECTIONS true
233
234 /* Define the strings used for the special svr4 .type and .size directives.
235 These strings generally do not vary from one system running svr4 to
236 another, but if a given system (e.g. m88k running svr) needs to use
237 different pseudo-op names for these, they may be overridden in the
238 file which includes this one. */
239
240 #define TYPE_ASM_OP "\t.type\t"
241 #define SIZE_ASM_OP "\t.size\t"
242
243 /* This is how we tell the assembler that a symbol is weak. */
244
245 #define ASM_WEAKEN_LABEL(FILE, NAME) \
246 do \
247 { \
248 fputs ("\t.weak\t", (FILE)); \
249 assemble_name ((FILE), (NAME)); \
250 fputc ('\n', (FILE)); \
251 } \
252 while (0)
253
254 /* The following macro defines the format used to output the second
255 operand of the .type assembler directive. Different svr4 assemblers
256 expect various different forms for this operand. The one given here
257 is just a default. You may need to override it in your machine-
258 specific tm.h file (depending upon the particulars of your assembler). */
259
260 #define TYPE_OPERAND_FMT "@%s"
261
262 /* Write the extra assembler code needed to declare a function's result.
263 Most svr4 assemblers don't require any special declaration of the
264 result value, but there are exceptions. */
265
266 #ifndef ASM_DECLARE_RESULT
267 #define ASM_DECLARE_RESULT(FILE, RESULT)
268 #endif
269
270 /* These macros generate the special .type and .size directives which
271 are used to set the corresponding fields of the linker symbol table
272 entries in an ELF object file under SVR4. These macros also output
273 the starting labels for the relevant functions/objects. */
274
275 /* Write the extra assembler code needed to declare a function properly.
276 Some svr4 assemblers need to also have something extra said about the
277 function's return value. We allow for that here. */
278
279 #ifndef ASM_DECLARE_FUNCTION_NAME
280 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
281 do \
282 { \
283 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function"); \
284 ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
285 ASM_OUTPUT_LABEL (FILE, NAME); \
286 } \
287 while (0)
288 #endif
289
290 /* Write the extra assembler code needed to declare an object properly. */
291
292 #ifdef HAVE_GAS_GNU_UNIQUE_OBJECT
293 #define USE_GNU_UNIQUE_OBJECT 1
294 #else
295 #define USE_GNU_UNIQUE_OBJECT 0
296 #endif
297
298 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
299 do \
300 { \
301 HOST_WIDE_INT size; \
302 \
303 /* For template static data member instantiations or \
304 inline fn local statics and their guard variables, use \
305 gnu_unique_object so that they will be combined even under \
306 RTLD_LOCAL. Don't use gnu_unique_object for typeinfo, \
307 vtables and other read-only artificial decls. */ \
308 if (USE_GNU_UNIQUE_OBJECT && DECL_ONE_ONLY (DECL) \
309 && (!DECL_ARTIFICIAL (DECL) || !TREE_READONLY (DECL))) \
310 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "gnu_unique_object"); \
311 else \
312 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \
313 \
314 size_directive_output = 0; \
315 if (!flag_inhibit_size_directive \
316 && (DECL) && DECL_SIZE (DECL)) \
317 { \
318 size_directive_output = 1; \
319 size = int_size_in_bytes (TREE_TYPE (DECL)); \
320 ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, size); \
321 } \
322 \
323 ASM_OUTPUT_LABEL (FILE, NAME); \
324 } \
325 while (0)
326
327 /* Output the size directive for a decl in rest_of_decl_compilation
328 in the case where we did not do so before the initializer.
329 Once we find the error_mark_node, we know that the value of
330 size_directive_output was set
331 by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */
332
333 #undef ASM_FINISH_DECLARE_OBJECT
334 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)\
335 do \
336 { \
337 const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \
338 HOST_WIDE_INT size; \
339 \
340 if (!flag_inhibit_size_directive \
341 && DECL_SIZE (DECL) \
342 && ! AT_END && TOP_LEVEL \
343 && DECL_INITIAL (DECL) == error_mark_node \
344 && !size_directive_output) \
345 { \
346 size_directive_output = 1; \
347 size = int_size_in_bytes (TREE_TYPE (DECL)); \
348 ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size); \
349 } \
350 } \
351 while (0)
352
353 /* This is how to declare the size of a function. */
354 #ifndef ASM_DECLARE_FUNCTION_SIZE
355 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
356 do \
357 { \
358 if (!flag_inhibit_size_directive) \
359 ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME); \
360 } \
361 while (0)
362 #endif
363
364 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
365 ASM_OUTPUT_LIMITED_STRING macros. Each byte in the table
366 corresponds to a particular byte value [0..255]. For any
367 given byte value, if the value in the corresponding table
368 position is zero, the given character can be output directly.
369 If the table value is 1, the byte must be output as a \ooo
370 octal escape. If the tables value is anything else, then the
371 byte value should be output as a \ followed by the value
372 in the table. Note that we can use standard UN*X escape
373 sequences for many control characters, but we don't use
374 \a to represent BEL because some svr4 assemblers (e.g. on
375 the i386) don't know about that. Also, we don't use \v
376 since some versions of gas, such as 2.2 did not accept it. */
377
378 #define ESCAPES \
379 "\1\1\1\1\1\1\1\1btn\1fr\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
380 \0\0\"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
381 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\\\0\0\0\
382 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\
383 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
384 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
385 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
386 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1"
387
388 /* Some svr4 assemblers have a limit on the number of characters which
389 can appear in the operand of a .string directive. If your assembler
390 has such a limitation, you should define STRING_LIMIT to reflect that
391 limit. Note that at least some svr4 assemblers have a limit on the
392 actual number of bytes in the double-quoted string, and that they
393 count each character in an escape sequence as one byte. Thus, an
394 escape sequence like \377 would count as four bytes.
395
396 If your target assembler doesn't support the .string directive, you
397 should define this to zero.
398 */
399
400 #define STRING_LIMIT ((unsigned) 256)
401
402 #define STRING_ASM_OP "\t.string\t"
403
404 /* The routine used to output NUL terminated strings. We use a special
405 version of this for most svr4 targets because doing so makes the
406 generated assembly code more compact (and thus faster to assemble)
407 as well as more readable, especially for targets like the i386
408 (where the only alternative is to output character sequences as
409 comma separated lists of numbers). */
410
411 #define ASM_OUTPUT_LIMITED_STRING(FILE, STR) \
412 do \
413 { \
414 register const unsigned char *_limited_str = \
415 (const unsigned char *) (STR); \
416 register unsigned ch; \
417 \
418 fprintf ((FILE), "%s\"", STRING_ASM_OP); \
419 \
420 for (; (ch = *_limited_str); _limited_str++) \
421 { \
422 register int escape; \
423 \
424 switch (escape = ESCAPES[ch]) \
425 { \
426 case 0: \
427 putc (ch, (FILE)); \
428 break; \
429 case 1: \
430 fprintf ((FILE), "\\%03o", ch); \
431 break; \
432 default: \
433 putc ('\\', (FILE)); \
434 putc (escape, (FILE)); \
435 break; \
436 } \
437 } \
438 \
439 fprintf ((FILE), "\"\n"); \
440 } \
441 while (0)
442
443 /* The routine used to output sequences of byte values. We use a special
444 version of this for most svr4 targets because doing so makes the
445 generated assembly code more compact (and thus faster to assemble)
446 as well as more readable. Note that if we find subparts of the
447 character sequence which end with NUL (and which are shorter than
448 STRING_LIMIT) we output those using ASM_OUTPUT_LIMITED_STRING. */
449
450 #undef ASM_OUTPUT_ASCII
451 #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \
452 do \
453 { \
454 const unsigned char *_ascii_bytes = \
455 (const unsigned char *) (STR); \
456 const unsigned char *limit = _ascii_bytes + (LENGTH); \
457 const unsigned char *last_null = NULL; \
458 unsigned bytes_in_chunk = 0; \
459 \
460 for (; _ascii_bytes < limit; _ascii_bytes++) \
461 { \
462 const unsigned char *p; \
463 \
464 if (bytes_in_chunk >= 60) \
465 { \
466 fprintf ((FILE), "\"\n"); \
467 bytes_in_chunk = 0; \
468 } \
469 \
470 if (_ascii_bytes > last_null) \
471 { \
472 for (p = _ascii_bytes; p < limit && *p != '\0'; p++) \
473 continue; \
474 last_null = p; \
475 } \
476 else \
477 p = last_null; \
478 \
479 if (p < limit && (p - _ascii_bytes) <= (long)STRING_LIMIT) \
480 { \
481 if (bytes_in_chunk > 0) \
482 { \
483 fprintf ((FILE), "\"\n"); \
484 bytes_in_chunk = 0; \
485 } \
486 \
487 ASM_OUTPUT_LIMITED_STRING ((FILE), _ascii_bytes); \
488 _ascii_bytes = p; \
489 } \
490 else \
491 { \
492 register int escape; \
493 register unsigned ch; \
494 \
495 if (bytes_in_chunk == 0) \
496 fprintf ((FILE), "%s\"", ASCII_DATA_ASM_OP); \
497 \
498 switch (escape = ESCAPES[ch = *_ascii_bytes]) \
499 { \
500 case 0: \
501 putc (ch, (FILE)); \
502 bytes_in_chunk++; \
503 break; \
504 case 1: \
505 fprintf ((FILE), "\\%03o", ch); \
506 bytes_in_chunk += 4; \
507 break; \
508 default: \
509 putc ('\\', (FILE)); \
510 putc (escape, (FILE)); \
511 bytes_in_chunk += 2; \
512 break; \
513 } \
514 } \
515 } \
516 \
517 if (bytes_in_chunk > 0) \
518 fprintf ((FILE), "\"\n"); \
519 } \
520 while (0)
521
522 /* Allow the use of the -frecord-gcc-switches switch via the
523 elf_record_gcc_switches function defined in varasm.c. */
524 #undef TARGET_ASM_RECORD_GCC_SWITCHES
525 #define TARGET_ASM_RECORD_GCC_SWITCHES elf_record_gcc_switches
526
527 /* A C statement (sans semicolon) to output to the stdio stream STREAM
528 any text necessary for declaring the name of an external symbol
529 named NAME which is referenced in this compilation but not defined.
530 It is needed to properly support non-default visibility. */
531
532 #ifndef ASM_OUTPUT_EXTERNAL
533 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
534 default_elf_asm_output_external (FILE, DECL, NAME)
535 #endif
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