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[gcc.git] / gcc / config / svr4.h
1 /* svr4.h -- operating system specific defines to be used when
2 targeting GCC for some generic System V Release 4 system.
3 Copyright (C) 1991 Free Software Foundation, Inc.
4
5 Written by Ron Guilmette (rfg@ncd.com).
6
7 This file is part of GNU CC.
8
9 GNU CC 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 2, or (at your option)
12 any later version.
13
14 GNU CC 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 GNU CC; see the file COPYING. If not, write to
21 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
22
23 To use this file, make up a file with a name like:
24
25 ?????svr4.h
26
27 where ????? is replaced by the name of the basic hardware that you
28 are targeting for. Then, in the file ?????svr4.h, put something
29 like:
30
31 #include "?????.h"
32 #include "svr4.h"
33
34 followed by any really system-specific defines (or overrides of
35 defines) which you find that you need. For example, CPP_PREDEFINES
36 is defined here with only the defined -Dunix and -DSVR4. You should
37 probably override that in your target-specific ?????svr4.h file
38 with a set of defines that includes these, but also contains an
39 appropriate define for the type of hardware that you are targeting.
40 */
41
42 /* Define a symbol so that libgcc* can know what sort of operating
43 environment and assembler syntax we are targeting for. */
44 #ifndef SVR4
45 #define SVR4
46 #endif
47
48 /* For the sake of libgcc2.c, indicate target supports atexit. */
49 #define HAVE_ATEXIT
50
51 /* Cpp, assembler, linker, library, and startfile spec's. */
52
53 /* This defines which switch letters take arguments. On svr4, most of
54 the normal cases (defined in gcc.c) apply, and we also have -h* and
55 -z* options (for the linker). Note however that there is no such
56 thing as a -T option for svr4. */
57
58 #define SWITCH_TAKES_ARG(CHAR) \
59 ( (CHAR) == 'D' \
60 || (CHAR) == 'U' \
61 || (CHAR) == 'o' \
62 || (CHAR) == 'e' \
63 || (CHAR) == 'u' \
64 || (CHAR) == 'I' \
65 || (CHAR) == 'm' \
66 || (CHAR) == 'L' \
67 || (CHAR) == 'A' \
68 || (CHAR) == 'h' \
69 || (CHAR) == 'z')
70
71 /* This defines which multi-letter switches take arguments. On svr4,
72 there are no such switches except those implemented by GCC itself. */
73
74 #define WORD_SWITCH_TAKES_ARG(STR) \
75 (!strcmp (STR, "include") || !strcmp (STR, "imacros"))
76
77 /* You should redefine CPP_PREDEFINES in any file which includes this one.
78 The definition should be appropriate for the type of target system
79 involved, and it should include any -A (assertion) options which are
80 appropriate for the given target system. */
81 #undef CPP_PREDEFINES
82
83 /* Provide an ASM_SPEC appropriate for svr4. Here we try to support as
84 many of the specialized svr4 assembler options as seems reasonable,
85 given that there are certain options which we can't (or shouldn't)
86 support directly due to the fact that they conflict with other options
87 for other svr4 tools (e.g. ld) or with other options for GCC itself.
88 For example, we don't support the -o (output file) or -R (remove
89 input file) options because GCC already handles these things. We
90 also don't support the -m (run m4) option for the assembler because
91 that conflicts with the -m (produce load map) option of the svr4
92 linker. We do however allow passing arbitrary options to the svr4
93 assembler via the -Wa, option.
94
95 Note that gcc doesn't allow a space to follow -Y in a -Ym,* or -Yd,*
96 option.
97 */
98
99 #undef ASM_SPEC
100 #define ASM_SPEC \
101 "%{V} %{v:%{!V:-V}} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
102
103 /* svr4 assemblers need the `-' (indicating input from stdin) to come after
104 the -o option (and its argument) for some reason. If we try to put it
105 before the -o option, the assembler will try to read the file named as
106 the output file in the -o option as an input file (after it has already
107 written some stuff to it) and the binary stuff contained therein will
108 cause totally confuse the assembler, resulting in many spurious error
109 messages. */
110
111 #undef ASM_FINAL_SPEC
112 #define ASM_FINAL_SPEC "%{pipe:-}"
113
114 /* Under svr4, the normal location of the various *crt*.o files is the
115 /usr/ccs/lib directory. */
116
117 #undef MD_STARTFILE_PREFIX
118 #define MD_STARTFILE_PREFIX "/usr/ccs/lib/"
119
120 /* Provide a LIB_SPEC appropropriate for svr4. Here we tack on the default
121 standard C library (unless we are building a shared library) followed by
122 our own magical crtend.o file (see crtstuff.c) which provides part of
123 the support for getting C++ file-scope static object constructed before
124 entering `main', followed by the normal svr3/svr4 "finalizer" file,
125 which is either `gcrtn.o' or `crtn.o'. */
126
127 #undef LIB_SPEC
128 #define LIB_SPEC \
129 "%{!shared:%{!symbolic:-lc}} \
130 crtend.o%s \
131 %{!shared:%{!symbolic:%{pg:gcrtn.o}%{!pg:crtn.o%s}}}"
132
133 /* Provide a LINK_SPEC appropriate for svr4. Here we provide support
134 for the special GCC options -static, -shared, and -symbolic which
135 allow us to link things in one of these three modes by applying the
136 appropriate combinations of options at link-time. We also provide
137 support here for as many of the other svr4 linker options as seems
138 reasonable, given that some of them conflict with options for other
139 svr4 tools (e.g. the assembler). In particular, we do support the
140 -h*, -z*, -V, -b, -t, -Qy, -Qn, and -YP* options here, and the -e*,
141 -l*, -o*, -r, -s, -u*, and -L* options are directly supported
142 by gcc.c itself. We don't directly support the -m (generate load
143 map) option because that conflicts with the -m (run m4) option of
144 the svr4 assembler. We also don't directly support the svr4 linker's
145 -I* or -M* options because these conflict with existing GCC options.
146 We do however allow passing arbitrary options to the svr4 linker
147 via the -Wl, option. We don't support the svr4 linker's -a option
148 at all because it is totally useless and because it conflicts with
149 GCC's own -a option.
150
151 Note that gcc doesn't allow a space to follow -Y in a -YP,* option.
152
153 When the -G link option is used (-shared and -symbolic) a final link is
154 not being done. */
155
156 #undef LINK_SPEC
157 #define LINK_SPEC "%{z*} %{h*} %{V} %{v:%{!V:-V}} \
158 %{b} %{t} %{Wl,*:%*} \
159 %{static:-dn -Bstatic} \
160 %{shared:-G -dy} \
161 %{symbolic:-Bsymbolic -G -dy} \
162 %{YP,*} \
163 %{!YP,*:%{p:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
164 %{!p:-Y P,/usr/ccs/lib:/usr/lib}} \
165 %{Qy:} %{!Qn:-Qy}"
166
167 /* Gcc automatically adds in one of the files /usr/ccs/lib/values-Xc.o,
168 /usr/ccs/lib/values-Xa.o, or /usr/ccs/lib/values-Xt.o for each final
169 link step (depending upon the other gcc options selected, such as
170 -traditional and -ansi). These files each contain one (initialized)
171 copy of a special variable called `_lib_version'. Each one of these
172 files has `_lib_version' initialized to a different (enum) value.
173 The SVR4 library routines query the value of `_lib_version' at run
174 to decide how they should behave. Specifically, they decide (based
175 upon the value of `_lib_version') if they will act in a strictly ANSI
176 conformant manner or not.
177 */
178
179 #undef STARTFILE_SPEC
180 #define STARTFILE_SPEC "%{!shared: \
181 %{!symbolic: \
182 %{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}} \
183 %{pg:gcrti.o%s}%{!pg:crti.o%s} \
184 %{ansi:values-Xc.o%s} \
185 %{!ansi: \
186 %{traditional:values-Xt.o%s} \
187 %{!traditional:values-Xa.o%s}}}} crtbegin.o%s"
188
189 /* Attach a sepcial .ident directive to the end of the file to identify
190 the version of GCC which compiled this code. The format of the
191 .ident string is patterened after the ones produced by native svr4
192 C compilers. */
193
194 #define ASM_FILE_END(FILE) \
195 do { \
196 fprintf ((FILE), "\t.ident\t\"GCC: (GNU) %s\"\n", \
197 version_string); \
198 } while (0)
199
200 /* Allow #sccs in preprocessor. */
201
202 #define SCCS_DIRECTIVE
203
204 /* Output #ident as a .ident. */
205
206 #define ASM_OUTPUT_IDENT(FILE, NAME) \
207 fprintf (FILE, "\t.ident \"%s\"\n", NAME);
208
209 /* Use periods rather than dollar signs in special g++ assembler names. */
210
211 #define NO_DOLLAR_IN_LABEL
212
213 /* Writing `int' for a bitfield forces int alignment for the structure. */
214
215 #define PCC_BITFIELD_TYPE_MATTERS 1
216
217 /* Implicit library calls should use memcpy, not bcopy, etc. */
218
219 #define TARGET_MEM_FUNCTIONS
220
221 /* System V Release 4 uses DWARF debugging info. */
222
223 #define DWARF_DEBUGGING_INFO
224
225 /* The numbers used to denote specific machine registers in the System V
226 Release 4 DWARF debugging information are quite likely to be totally
227 different from the numbers used in BSD stabs debugging information
228 for the same kind of target machine. Thus, we undefine the macro
229 DBX_REGISTER_NUMBER here as an extra inducement to get people to
230 provide proper machine-specific definitions of DBX_REGISTER_NUMBER
231 (which is also used to provide DWARF registers numbers in dwarfout.c)
232 in their tm.h files which include this file. */
233
234 #undef DBX_REGISTER_NUMBER
235
236 /* Define the actual types of some ANSI-mandated types. (These
237 definitions should work for most SVR4 systems). */
238
239 #undef SIZE_TYPE
240 #define SIZE_TYPE "unsigned int"
241
242 #undef PTRDIFF_TYPE
243 #define PTRDIFF_TYPE "int"
244
245 #undef WCHAR_TYPE
246 #define WCHAR_TYPE "long int"
247
248 #undef WCHAR_TYPE_SIZE
249 #define WCHAR_TYPE_SIZE BITS_PER_WORD
250
251 #undef ASM_BYTE_OP
252 #define ASM_BYTE_OP "\t.byte"
253
254 /* This is how to begin an assembly language file. Most svr4 assemblers want
255 at least a .file directive to come first, and some want to see a .version
256 directive come right after that. Here we just establish a default
257 which generates only the .file directive. If you need a .version
258 directive for any specific target, you should override this definition
259 in the target-specific file which includes this one. */
260
261 #undef ASM_FILE_START
262 #define ASM_FILE_START(FILE) \
263 output_file_directive ((FILE), main_input_filename)
264
265 /* This is how to allocate empty space in some section. The .zero
266 pseudo-op is used for this on most svr4 assemblers. */
267
268 #undef ASM_OUTPUT_SKIP
269 #define ASM_OUTPUT_SKIP(FILE,SIZE) fprintf (FILE, "\t.zero\t%u\n", (SIZE))
270
271 /* This is how to output a reference to a user-level label named NAME.
272 `assemble_name' uses this.
273
274 For System V Release 4 the convention is *not* to prepend a leading
275 underscore onto user-level symbol names. */
276
277 #undef ASM_OUTPUT_LABELREF
278 #define ASM_OUTPUT_LABELREF(FILE,NAME) fprintf (FILE, "%s", NAME)
279
280 /* The standard SVR4 assembler seems to require that certain builtin
281 library routines (e.g. .udiv) be explicitly declared as .globl
282 in each assembly file where they are referenced. */
283
284 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
285 ASM_GLOBALIZE_LABEL (FILE, XSTR (FUN, 0))
286
287 /* This says how to output assembler code to declare an
288 uninitialized external linkage data object. Under SVR4,
289 the linker seems to want the alignment of data objects
290 to depend on their types. We do exactly that here. */
291
292 #undef ASM_OUTPUT_ALIGNED_COMMON
293 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
294 do { \
295 fputs ("\t.comm\t", (FILE)); \
296 assemble_name ((FILE), (NAME)); \
297 fprintf ((FILE), ",%u,%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT); \
298 } while (0)
299
300 /* This says how to output assembler code to declare an
301 uninitialized internal linkage data object. Under SVR4,
302 the linker seems to want the alignment of data objects
303 to depend on their types. We do exactly that here. */
304
305 #define BSS_ASM_OP "\t.bss"
306
307 #undef ASM_OUTPUT_ALIGNED_LOCAL
308 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
309 do { \
310 fprintf ((FILE), "%s\t%s,%u,%u\n", \
311 BSS_ASM_OP, (NAME), (SIZE), (ALIGN) / BITS_PER_UNIT); \
312 } while (0)
313
314 /* This is the pseudo-op used to generate a 32-bit word of data with a
315 specific value in some section. This is the same for all known svr4
316 assemblers. */
317
318 #define INT_ASM_OP "\t.long\t"
319
320 /* This is the pseudo-op used to generate a contiguous sequence of byte
321 values from a double-quoted string WITHOUT HAVING A TERMINATING NUL
322 AUTOMATICALLY APPENDED. This is the same for most svr4 assemblers. */
323
324 #undef ASCII_DATA_ASM_OP
325 #define ASCII_DATA_ASM_OP ".ascii"
326
327 /* Support const sections and the ctors and dtors sections for g++.
328 Note that there appears to be two different ways to support const
329 sections at the moment. You can either #define the symbol
330 READONLY_DATA_SECTION (giving it some code which switches to the
331 readonly data section) or else you can #define the symbols
332 EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and
333 SELECT_RTX_SECTION. We do both here just to be on the safe side. */
334
335 #define USE_CONST_SECTION 1
336
337 #define CONST_SECTION_ASM_OP "\t.section\t.rodata"
338 #define CTORS_SECTION_ASM_OP "\t.section\t.ctors,\"a\",@progbits\n"
339 #define DTORS_SECTION_ASM_OP "\t.section\t.dtors,\"a\",@progbits\n"
340
341 /* On svr4, we *do* have support for the .init section, and we can put
342 stuff in there to be executed before `main'. We let crtstuff.c and
343 other files know this by defining the following symbol. The definition
344 says how to change sections to the .init section. This is the same
345 for all know svr4 assemblers. */
346
347 #define INIT_SECTION_ASM_OP "\t.section\t.init"
348
349 /* A default list of other sections which we might be "in" at any given
350 time. For targets that use additional sections (e.g. .tdesc) you
351 should override this definition in the target-specific file which
352 includes this file. */
353
354 #undef EXTRA_SECTIONS
355 #define EXTRA_SECTIONS in_const, in_ctors, in_dtors
356
357 /* A default list of extra section function definitions. For targets
358 that use additional sections (e.g. .tdesc) you should override this
359 definition in the target-specific file which includes this file. */
360
361 #undef EXTRA_SECTION_FUNCTIONS
362 #define EXTRA_SECTION_FUNCTIONS \
363 CONST_SECTION_FUNCTION \
364 CTORS_SECTION_FUNCTION \
365 DTORS_SECTION_FUNCTION
366
367 #define READONLY_DATA_SECTION() const_section ()
368
369 extern void text_section();
370
371 #define CONST_SECTION_FUNCTION \
372 void \
373 const_section () \
374 { \
375 if (!USE_CONST_SECTION) \
376 text_section(); \
377 else if (in_section != in_const) \
378 { \
379 fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP); \
380 in_section = in_const; \
381 } \
382 }
383
384 #define CTORS_SECTION_FUNCTION \
385 void \
386 ctors_section () \
387 { \
388 if (in_section != in_ctors) \
389 { \
390 fprintf (asm_out_file, CTORS_SECTION_ASM_OP); \
391 in_section = in_ctors; \
392 } \
393 }
394
395 #define DTORS_SECTION_FUNCTION \
396 void \
397 dtors_section () \
398 { \
399 if (in_section != in_dtors) \
400 { \
401 fprintf (asm_out_file, DTORS_SECTION_ASM_OP); \
402 in_section = in_dtors; \
403 } \
404 }
405
406 /* A C statement (sans semicolon) to output an element in the table of
407 global constructors. */
408 #define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \
409 do { \
410 ctors_section (); \
411 fprintf (FILE, "%s\t ", INT_ASM_OP); \
412 assemble_name (FILE, NAME); \
413 fprintf (FILE, "\n"); \
414 } while (0)
415
416 /* A C statement (sans semicolon) to output an element in the table of
417 global destructors. */
418 #define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \
419 do { \
420 dtors_section (); \
421 fprintf (FILE, "%s\t ", INT_ASM_OP); \
422 assemble_name (FILE, NAME); \
423 fprintf (FILE, "\n"); \
424 } while (0)
425
426 /* A C statement or statements to switch to the appropriate
427 section for output of DECL. DECL is either a `VAR_DECL' node
428 or a constant of some sort. RELOC indicates whether forming
429 the initial value of DECL requires link-time relocations. */
430
431 #define SELECT_SECTION(DECL,RELOC) \
432 { \
433 if (TREE_CODE (DECL) == STRING_CST) \
434 { \
435 if (! flag_writable_strings) \
436 const_section (); \
437 else \
438 data_section (); \
439 } \
440 else if (TREE_CODE (DECL) == VAR_DECL) \
441 { \
442 if ((flag_pic && RELOC) \
443 || !TREE_READONLY (DECL) || TREE_SIDE_EFFECTS (DECL)) \
444 data_section (); \
445 else \
446 const_section (); \
447 } \
448 else \
449 const_section (); \
450 }
451
452 /* A C statement or statements to switch to the appropriate
453 section for output of RTX in mode MODE. RTX is some kind
454 of constant in RTL. The argument MODE is redundant except
455 in the case of a `const_int' rtx. Currently, these always
456 go into the const section. */
457
458 #undef SELECT_RTX_SECTION
459 #define SELECT_RTX_SECTION(MODE,RTX) const_section()
460
461 /* Define the strings used for the special svr4 .type and .size directives.
462 These strings generally do not vary from one system running svr4 to
463 another, but if a given system (e.g. m88k running svr) needs to use
464 different pseudo-op names for these, they may be overridden in the
465 file which includes this one. */
466
467 #define TYPE_ASM_OP "\t.type"
468 #define SIZE_ASM_OP "\t.size"
469
470 /* The following macro defines the format used to output the second
471 operand of the .type assembler directive. Different svr4 assemblers
472 expect various different forms for this operand. The one given here
473 is just a default. You may need to override it in your machine-
474 specific tm.h file (depending upon the particulars of your assembler). */
475
476 #define TYPE_OPERAND_FMT "@%s"
477
478 /* These macros generate the special .type and .size directives which
479 are used to set the corresponding fields of the linker symbol table
480 entries in an ELF object file under SVR4. */
481
482 /* Write the extra assembler code needed to declare a function properly. */
483
484 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
485 do { \
486 fprintf (FILE, "%s\t ", TYPE_ASM_OP); \
487 assemble_name (FILE, NAME); \
488 putc (',', FILE); \
489 fprintf (FILE, TYPE_OPERAND_FMT, "function"); \
490 putc ('\n', FILE); \
491 ASM_OUTPUT_LABEL(FILE, NAME); \
492 } while (0)
493
494 /* Write the extra assembler code needed to declare an object properly. */
495
496 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
497 do { \
498 fprintf (FILE, "%s\t ", TYPE_ASM_OP); \
499 assemble_name (FILE, NAME); \
500 putc (',', FILE); \
501 fprintf (FILE, TYPE_OPERAND_FMT, "object"); \
502 putc ('\n', FILE); \
503 if (!flag_inhibit_size_directive) \
504 { \
505 fprintf (FILE, "%s\t ", SIZE_ASM_OP); \
506 assemble_name (FILE, NAME); \
507 fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (decl))); \
508 } \
509 ASM_OUTPUT_LABEL(FILE, NAME); \
510 } while (0)
511
512 /* This is how to declare the size of a function. */
513
514 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
515 do { \
516 if (!flag_inhibit_size_directive) \
517 { \
518 char label[256]; \
519 static int labelno; \
520 labelno++; \
521 ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno); \
522 ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno); \
523 fprintf (FILE, "%s\t ", SIZE_ASM_OP); \
524 assemble_name (FILE, (FNAME)); \
525 fprintf (FILE, ","); \
526 assemble_name (FILE, label); \
527 fprintf (FILE, "-"); \
528 ASM_OUTPUT_LABELREF (FILE, (FNAME)); \
529 putc ('\n', FILE); \
530 } \
531 } while (0)
532
533 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
534 ASM_OUTPUT_LIMITED_STRING macros. Each byte in the table
535 corresponds to a particular byte value [0..255]. For any
536 given byte value, if the value in the corresponding table
537 position is zero, the given character can be output directly.
538 If the table value is 1, the byte must be output as a \ooo
539 octal escape. If the tables value is anything else, then the
540 byte value should be output as a \ followed by the value
541 in the table. Note that we can use standard UN*X escape
542 sequences for many control characters, but we don't use
543 \a to represent BEL because some svr4 assemblers (e.g. on
544 the i386) don't know about that. */
545
546 #define ESCAPES \
547 "\1\1\1\1\1\1\1\1btnvfr\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
548 \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\
549 \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\
550 \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\
551 \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\
552 \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\
553 \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\
554 \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"
555
556 /* Some svr4 assemblers have a limit on the number of characters which
557 can appear in the operand of a .string directive. If your assembler
558 has such a limitation, you should define STRING_LIMIT to reflect that
559 limit. Note that at least some svr4 assemblers have a limit on the
560 actual number of bytes in the double-quoted string, and that they
561 count each chanacter in an escape sequence as one byte. Thus, an
562 escape sequence like \377 would count as four bytes.
563
564 If your target assembler doesn't support the .string directive, you
565 should define this to zero.
566 */
567
568 #define STRING_LIMIT ((unsigned) 256)
569
570 #define STRING_ASM_OP ".string"
571
572 /* The routine used to output NUL terminated strings. We use a special
573 version of this for most svr4 targets because doing so makes the
574 generated assembly code more compact (and thus faster to assemble)
575 as well as more readable, especially for targets like the i386
576 (where the only alternative is to output character sequences as
577 comma separated lists of numbers). */
578
579 #define ASM_OUTPUT_LIMITED_STRING(FILE, STR) \
580 do \
581 { \
582 register unsigned char *_limited_str = (unsigned char *) (STR); \
583 register unsigned ch; \
584 fprintf ((FILE), "\t%s\t\"", STRING_ASM_OP); \
585 for (; ch = *_limited_str; _limited_str++) \
586 { \
587 register int escape; \
588 switch (escape = ESCAPES[ch]) \
589 { \
590 case 0: \
591 putc (ch, (FILE)); \
592 break; \
593 case 1: \
594 fprintf ((FILE), "\\%03o", ch); \
595 break; \
596 default: \
597 putc ('\\', (FILE)); \
598 putc (escape, (FILE)); \
599 break; \
600 } \
601 } \
602 fprintf ((FILE), "\"\n"); \
603 } \
604 while (0)
605
606 /* The routine used to output sequences of byte values. We use a special
607 version of this for most svr4 targets because doing so makes the
608 generated assembly code more compact (and thus faster to assemble)
609 as well as more readable. Note that if we find subparts of the
610 character sequence which end with NUL (and which are shorter than
611 STRING_LIMIT) we output those using ASM_OUTPUT_LIMITED_STRING. */
612
613 #undef ASM_OUTPUT_ASCII
614 #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \
615 do \
616 { \
617 register unsigned char *_ascii_bytes = (unsigned char *) (STR); \
618 register unsigned char *limit = _ascii_bytes + (LENGTH); \
619 register unsigned bytes_in_chunk = 0; \
620 for (; _ascii_bytes < limit; _ascii_bytes++) \
621 { \
622 register unsigned char *p; \
623 if (bytes_in_chunk >= 60) \
624 { \
625 fprintf ((FILE), "\"\n"); \
626 bytes_in_chunk = 0; \
627 } \
628 for (p = _ascii_bytes; p < limit && *p != '\0'; p++) \
629 continue; \
630 if (p < limit && (p - _ascii_bytes) <= STRING_LIMIT) \
631 { \
632 if (bytes_in_chunk > 0) \
633 { \
634 fprintf ((FILE), "\"\n"); \
635 bytes_in_chunk = 0; \
636 } \
637 ASM_OUTPUT_LIMITED_STRING ((FILE), _ascii_bytes); \
638 _ascii_bytes = p; \
639 } \
640 else \
641 { \
642 register int escape; \
643 register unsigned ch; \
644 if (bytes_in_chunk == 0) \
645 fprintf ((FILE), "\t%s\t\"", ASCII_DATA_ASM_OP); \
646 switch (escape = ESCAPES[ch = *_ascii_bytes]) \
647 { \
648 case 0: \
649 putc (ch, (FILE)); \
650 bytes_in_chunk++; \
651 break; \
652 case 1: \
653 fprintf ((FILE), "\\%03o", ch); \
654 bytes_in_chunk += 4; \
655 break; \
656 default: \
657 putc ('\\', (FILE)); \
658 putc (escape, (FILE)); \
659 bytes_in_chunk += 2; \
660 break; \
661 } \
662 } \
663 } \
664 if (bytes_in_chunk > 0) \
665 fprintf ((FILE), "\"\n"); \
666 } \
667 while (0)