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.
5 Written by Ron Guilmette (rfg@ncd.com).
7 This file is part of GNU CC.
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)
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.
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.
23 To use this file, make up a file with a name like:
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
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.
42 /* For the sake of libgcc2.c, indicate target supports atexit. */
45 /* Cpp, assembler, linker, library, and startfile spec's. */
47 /* This defines which switch letters take arguments. On svr4, most of
48 the normal cases (defined in gcc.c) apply, and we also have -h* and
49 -z* options (for the linker). Note however that there is no such
50 thing as a -T option for svr4. */
52 #define SWITCH_TAKES_ARG(CHAR) \
65 /* This defines which multi-letter switches take arguments. On svr4,
66 there are no such switches except those implemented by GCC itself. */
68 #define WORD_SWITCH_TAKES_ARG(STR) \
69 (!strcmp (STR, "include") || !strcmp (STR, "imacros") \
70 || !strcmp (STR, "aux-info"))
72 /* You should redefine CPP_PREDEFINES in any file which includes this one.
73 The definition should be appropriate for the type of target system
74 involved, and it should include any -A (assertion) options which are
75 appropriate for the given target system. */
78 /* Provide an ASM_SPEC appropriate for svr4. Here we try to support as
79 many of the specialized svr4 assembler options as seems reasonable,
80 given that there are certain options which we can't (or shouldn't)
81 support directly due to the fact that they conflict with other options
82 for other svr4 tools (e.g. ld) or with other options for GCC itself.
83 For example, we don't support the -o (output file) or -R (remove
84 input file) options because GCC already handles these things. We
85 also don't support the -m (run m4) option for the assembler because
86 that conflicts with the -m (produce load map) option of the svr4
87 linker. We do however allow passing arbitrary options to the svr4
88 assembler via the -Wa, option.
90 Note that gcc doesn't allow a space to follow -Y in a -Ym,* or -Yd,*
96 "%{V} %{v:%{!V:-V}} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
98 /* svr4 assemblers need the `-' (indicating input from stdin) to come after
99 the -o option (and its argument) for some reason. If we try to put it
100 before the -o option, the assembler will try to read the file named as
101 the output file in the -o option as an input file (after it has already
102 written some stuff to it) and the binary stuff contained therein will
103 cause totally confuse the assembler, resulting in many spurious error
106 #undef ASM_FINAL_SPEC
107 #define ASM_FINAL_SPEC "%{pipe:-}"
109 /* Under svr4, the normal location of the `ld' and `as' programs is the
110 /usr/ccs/bin directory. */
112 #undef MD_EXEC_PREFIX
113 #define MD_EXEC_PREFIX "/usr/ccs/bin/"
115 /* Under svr4, the normal location of the various *crt*.o files is the
116 /usr/ccs/lib directory. */
118 #undef MD_STARTFILE_PREFIX
119 #define MD_STARTFILE_PREFIX "/usr/ccs/lib/"
121 /* Provide a LIB_SPEC appropriate for svr4. Here we tack on the default
122 standard C library (unless we are building a shared library) followed by
123 our own magical crtend.o file (see crtstuff.c) which provides part of
124 the support for getting C++ file-scope static object constructed before
125 entering `main', followed by the normal svr3/svr4 "finalizer" file,
126 which is either `gcrtn.o' or `crtn.o'. */
130 "%{!shared:%{!symbolic:-lc}} \
132 %{!shared:%{!symbolic:%{pg:gcrtn.o}%{!pg:crtn.o%s}}}"
134 /* Provide a LINK_SPEC appropriate for svr4. Here we provide support
135 for the special GCC options -static, -shared, and -symbolic which
136 allow us to link things in one of these three modes by applying the
137 appropriate combinations of options at link-time. We also provide
138 support here for as many of the other svr4 linker options as seems
139 reasonable, given that some of them conflict with options for other
140 svr4 tools (e.g. the assembler). In particular, we do support the
141 -h*, -z*, -V, -b, -t, -Qy, -Qn, and -YP* options here, and the -e*,
142 -l*, -o*, -r, -s, -u*, and -L* options are directly supported
143 by gcc.c itself. We don't directly support the -m (generate load
144 map) option because that conflicts with the -m (run m4) option of
145 the svr4 assembler. We also don't directly support the svr4 linker's
146 -I* or -M* options because these conflict with existing GCC options.
147 We do however allow passing arbitrary options to the svr4 linker
148 via the -Wl, option. We don't support the svr4 linker's -a option
149 at all because it is totally useless and because it conflicts with
152 Note that gcc doesn't allow a space to follow -Y in a -YP,* option.
154 When the -G link option is used (-shared and -symbolic) a final link is
158 #define LINK_SPEC "%{h*} %{V} %{v:%{!V:-V}} \
160 %{static:-dn -Bstatic} \
162 %{symbolic:-Bsymbolic -G -dy} \
165 %{!YP,*:%{p:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
166 %{!p:-Y P,/usr/ccs/lib:/usr/lib}} \
169 /* Gcc automatically adds in one of the files /usr/ccs/lib/values-Xc.o,
170 /usr/ccs/lib/values-Xa.o, or /usr/ccs/lib/values-Xt.o for each final
171 link step (depending upon the other gcc options selected, such as
172 -traditional and -ansi). These files each contain one (initialized)
173 copy of a special variable called `_lib_version'. Each one of these
174 files has `_lib_version' initialized to a different (enum) value.
175 The SVR4 library routines query the value of `_lib_version' at run
176 to decide how they should behave. Specifically, they decide (based
177 upon the value of `_lib_version') if they will act in a strictly ANSI
178 conforming manner or not.
181 #undef STARTFILE_SPEC
182 #define STARTFILE_SPEC "%{!shared: \
184 %{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}} \
185 %{pg:gcrti.o%s}%{!pg:crti.o%s} \
186 %{ansi:values-Xc.o%s} \
188 %{traditional:values-Xt.o%s} \
189 %{!traditional:values-Xa.o%s}}}} crtbegin.o%s"
191 /* Attach a special .ident directive to the end of the file to identify
192 the version of GCC which compiled this code. The format of the
193 .ident string is patterned after the ones produced by native svr4
196 #define IDENT_ASM_OP ".ident"
198 #define ASM_FILE_END(FILE) \
200 fprintf ((FILE), "\t%s\t\"GCC: (GNU) %s\"\n", \
201 IDENT_ASM_OP, version_string); \
204 /* Allow #sccs in preprocessor. */
206 #define SCCS_DIRECTIVE
208 /* Output #ident as a .ident. */
210 #define ASM_OUTPUT_IDENT(FILE, NAME) \
211 fprintf (FILE, "\t%s\t\"%s\"\n", IDENT_ASM_OP, NAME);
213 /* Use periods rather than dollar signs in special g++ assembler names. */
215 #define NO_DOLLAR_IN_LABEL
217 /* Writing `int' for a bitfield forces int alignment for the structure. */
219 #define PCC_BITFIELD_TYPE_MATTERS 1
221 /* Implicit library calls should use memcpy, not bcopy, etc. */
223 #define TARGET_MEM_FUNCTIONS
225 /* Handle #pragma weak and #pragma pack. */
227 #define HANDLE_SYSV_PRAGMA
229 /* System V Release 4 uses DWARF debugging info. */
231 #define DWARF_DEBUGGING_INFO
233 /* The numbers used to denote specific machine registers in the System V
234 Release 4 DWARF debugging information are quite likely to be totally
235 different from the numbers used in BSD stabs debugging information
236 for the same kind of target machine. Thus, we undefine the macro
237 DBX_REGISTER_NUMBER here as an extra inducement to get people to
238 provide proper machine-specific definitions of DBX_REGISTER_NUMBER
239 (which is also used to provide DWARF registers numbers in dwarfout.c)
240 in their tm.h files which include this file. */
242 #undef DBX_REGISTER_NUMBER
244 /* Define the actual types of some ANSI-mandated types. (These
245 definitions should work for most SVR4 systems). */
248 #define SIZE_TYPE "unsigned int"
251 #define PTRDIFF_TYPE "int"
254 #define WCHAR_TYPE "long int"
256 #undef WCHAR_TYPE_SIZE
257 #define WCHAR_TYPE_SIZE BITS_PER_WORD
259 /* This causes trouble, because it requires the host machine
260 to support ANSI C. */
261 /* #define MULTIBYTE_CHARS */
264 #define ASM_BYTE_OP ".byte"
267 #define SET_ASM_OP ".set"
269 /* This is how to begin an assembly language file. Most svr4 assemblers want
270 at least a .file directive to come first, and some want to see a .version
271 directive come right after that. Here we just establish a default
272 which generates only the .file directive. If you need a .version
273 directive for any specific target, you should override this definition
274 in the target-specific file which includes this one. */
276 #undef ASM_FILE_START
277 #define ASM_FILE_START(FILE) \
278 output_file_directive ((FILE), main_input_filename)
280 /* This is how to allocate empty space in some section. The .zero
281 pseudo-op is used for this on most svr4 assemblers. */
283 #define SKIP_ASM_OP ".zero"
285 #undef ASM_OUTPUT_SKIP
286 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
287 fprintf (FILE, "\t%s\t%u\n", SKIP_ASM_OP, (SIZE))
289 /* This is how to output a reference to a user-level label named NAME.
290 `assemble_name' uses this.
292 For System V Release 4 the convention is *not* to prepend a leading
293 underscore onto user-level symbol names. */
295 #undef ASM_OUTPUT_LABELREF
296 #define ASM_OUTPUT_LABELREF(FILE,NAME) fprintf (FILE, "%s", NAME)
298 /* This is how to output an internal numbered label where
299 PREFIX is the class of label and NUM is the number within the class.
301 For most svr4 systems, the convention is that any symbol which begins
302 with a period is not put into the linker symbol table by the assembler. */
304 #undef ASM_OUTPUT_INTERNAL_LABEL
305 #define ASM_OUTPUT_INTERNAL_LABEL(FILE, PREFIX, NUM) \
307 fprintf (FILE, ".%s%d:\n", PREFIX, NUM); \
310 /* This is how to store into the string LABEL
311 the symbol_ref name of an internal numbered label where
312 PREFIX is the class of label and NUM is the number within the class.
313 This is suitable for output with `assemble_name'.
315 For most svr4 systems, the convention is that any symbol which begins
316 with a period is not put into the linker symbol table by the assembler. */
318 #undef ASM_GENERATE_INTERNAL_LABEL
319 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
321 sprintf (LABEL, "*.%s%d", PREFIX, NUM); \
324 /* Output the label which preceeds a jumptable. Note that for all svr4
325 systems where we actually generate jumptables (which is to say every
326 svr4 target except i386, where we use casesi instead) we put the jump-
327 tables into the .rodata section and since other stuff could have been
328 put into the .rodata section prior to any given jumptable, we have to
329 make sure that the location counter for the .rodata section gets pro-
330 perly re-aligned prior to the actual beginning of the jump table. */
332 #define ALIGN_ASM_OP ".align"
334 #undef ASM_OUTPUT_CASE_LABEL
335 #define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,JUMPTABLE) \
337 ASM_OUTPUT_ALIGN ((FILE), 2); \
338 ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM); \
341 /* The standard SVR4 assembler seems to require that certain builtin
342 library routines (e.g. .udiv) be explicitly declared as .globl
343 in each assembly file where they are referenced. */
345 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
346 ASM_GLOBALIZE_LABEL (FILE, XSTR (FUN, 0))
348 /* This says how to output assembler code to declare an
349 uninitialized external linkage data object. Under SVR4,
350 the linker seems to want the alignment of data objects
351 to depend on their types. We do exactly that here. */
353 #define COMMON_ASM_OP ".comm"
355 #undef ASM_OUTPUT_ALIGNED_COMMON
356 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
358 fprintf ((FILE), "\t%s\t", COMMON_ASM_OP); \
359 assemble_name ((FILE), (NAME)); \
360 fprintf ((FILE), ",%u,%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT); \
363 /* This says how to output assembler code to declare an
364 uninitialized internal linkage data object. Under SVR4,
365 the linker seems to want the alignment of data objects
366 to depend on their types. We do exactly that here. */
368 #define LOCAL_ASM_OP ".local"
370 #undef ASM_OUTPUT_ALIGNED_LOCAL
371 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
373 fprintf ((FILE), "\t%s\t", LOCAL_ASM_OP); \
374 assemble_name ((FILE), (NAME)); \
375 fprintf ((FILE), "\n"); \
376 ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN); \
379 /* This is the pseudo-op used to generate a 32-bit word of data with a
380 specific value in some section. This is the same for all known svr4
383 #define INT_ASM_OP ".long"
385 /* This is the pseudo-op used to generate a contiguous sequence of byte
386 values from a double-quoted string WITHOUT HAVING A TERMINATING NUL
387 AUTOMATICALLY APPENDED. This is the same for most svr4 assemblers. */
389 #undef ASCII_DATA_ASM_OP
390 #define ASCII_DATA_ASM_OP ".ascii"
392 /* Support const sections and the ctors and dtors sections for g++.
393 Note that there appears to be two different ways to support const
394 sections at the moment. You can either #define the symbol
395 READONLY_DATA_SECTION (giving it some code which switches to the
396 readonly data section) or else you can #define the symbols
397 EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and
398 SELECT_RTX_SECTION. We do both here just to be on the safe side. */
400 #define USE_CONST_SECTION 1
402 #define CONST_SECTION_ASM_OP ".section\t.rodata"
403 #define CTORS_SECTION_ASM_OP ".section\t.ctors,\"a\",@progbits"
404 #define DTORS_SECTION_ASM_OP ".section\t.dtors,\"a\",@progbits"
406 /* On svr4, we *do* have support for the .init section, and we can put
407 stuff in there to be executed before `main'. We let crtstuff.c and
408 other files know this by defining the following symbol. The definition
409 says how to change sections to the .init section. This is the same
410 for all know svr4 assemblers. */
412 #define INIT_SECTION_ASM_OP ".section\t.init"
414 /* A default list of other sections which we might be "in" at any given
415 time. For targets that use additional sections (e.g. .tdesc) you
416 should override this definition in the target-specific file which
417 includes this file. */
419 #undef EXTRA_SECTIONS
420 #define EXTRA_SECTIONS in_const, in_ctors, in_dtors
422 /* A default list of extra section function definitions. For targets
423 that use additional sections (e.g. .tdesc) you should override this
424 definition in the target-specific file which includes this file. */
426 #undef EXTRA_SECTION_FUNCTIONS
427 #define EXTRA_SECTION_FUNCTIONS \
428 CONST_SECTION_FUNCTION \
429 CTORS_SECTION_FUNCTION \
430 DTORS_SECTION_FUNCTION
432 #define READONLY_DATA_SECTION() const_section ()
434 extern void text_section();
436 #define CONST_SECTION_FUNCTION \
440 if (!USE_CONST_SECTION) \
442 else if (in_section != in_const) \
444 fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP); \
445 in_section = in_const; \
449 #define CTORS_SECTION_FUNCTION \
453 if (in_section != in_ctors) \
455 fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP); \
456 in_section = in_ctors; \
460 #define DTORS_SECTION_FUNCTION \
464 if (in_section != in_dtors) \
466 fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP); \
467 in_section = in_dtors; \
471 /* A C statement (sans semicolon) to output an element in the table of
472 global constructors. */
473 #define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \
476 fprintf (FILE, "\t%s\t ", INT_ASM_OP); \
477 assemble_name (FILE, NAME); \
478 fprintf (FILE, "\n"); \
481 /* A C statement (sans semicolon) to output an element in the table of
482 global destructors. */
483 #define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \
486 fprintf (FILE, "\t%s\t ", INT_ASM_OP); \
487 assemble_name (FILE, NAME); \
488 fprintf (FILE, "\n"); \
491 /* A C statement or statements to switch to the appropriate
492 section for output of DECL. DECL is either a `VAR_DECL' node
493 or a constant of some sort. RELOC indicates whether forming
494 the initial value of DECL requires link-time relocations. */
496 #define SELECT_SECTION(DECL,RELOC) \
498 if (TREE_CODE (DECL) == STRING_CST) \
500 if (! flag_writable_strings) \
505 else if (TREE_CODE (DECL) == VAR_DECL) \
507 if ((flag_pic && RELOC) \
508 || !TREE_READONLY (DECL) || TREE_SIDE_EFFECTS (DECL)) \
517 /* A C statement or statements to switch to the appropriate
518 section for output of RTX in mode MODE. RTX is some kind
519 of constant in RTL. The argument MODE is redundant except
520 in the case of a `const_int' rtx. Currently, these always
521 go into the const section. */
523 #undef SELECT_RTX_SECTION
524 #define SELECT_RTX_SECTION(MODE,RTX) const_section()
526 /* Define the strings used for the special svr4 .type and .size directives.
527 These strings generally do not vary from one system running svr4 to
528 another, but if a given system (e.g. m88k running svr) needs to use
529 different pseudo-op names for these, they may be overridden in the
530 file which includes this one. */
532 #define TYPE_ASM_OP ".type"
533 #define SIZE_ASM_OP ".size"
534 #define WEAK_ASM_OP ".weak"
536 /* The following macro defines the format used to output the second
537 operand of the .type assembler directive. Different svr4 assemblers
538 expect various different forms for this operand. The one given here
539 is just a default. You may need to override it in your machine-
540 specific tm.h file (depending upon the particulars of your assembler). */
542 #define TYPE_OPERAND_FMT "@%s"
544 /* Write the extra assembler code needed to declare a function's result.
545 Most svr4 assemblers don't require any special declaration of the
546 result value, but there are exceptions. */
548 #ifndef ASM_DECLARE_RESULT
549 #define ASM_DECLARE_RESULT(FILE, RESULT)
552 /* These macros generate the special .type and .size directives which
553 are used to set the corresponding fields of the linker symbol table
554 entries in an ELF object file under SVR4. These macros also output
555 the starting labels for the relevant functions/objects. */
557 /* Write the extra assembler code needed to declare a function properly.
558 Some svr4 assemblers need to also have something extra said about the
559 function's return value. We allow for that here. */
561 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
563 fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
564 assemble_name (FILE, NAME); \
566 fprintf (FILE, TYPE_OPERAND_FMT, "function"); \
568 ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
569 ASM_OUTPUT_LABEL(FILE, NAME); \
572 /* Write the extra assembler code needed to declare an object properly. */
574 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
576 fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
577 assemble_name (FILE, NAME); \
579 fprintf (FILE, TYPE_OPERAND_FMT, "object"); \
581 if (!flag_inhibit_size_directive) \
583 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
584 assemble_name (FILE, NAME); \
585 fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (decl))); \
587 ASM_OUTPUT_LABEL(FILE, NAME); \
590 /* This is how to declare the size of a function. */
592 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
594 if (!flag_inhibit_size_directive) \
597 static int labelno; \
599 ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno); \
600 ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno); \
601 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
602 assemble_name (FILE, (FNAME)); \
603 fprintf (FILE, ","); \
604 assemble_name (FILE, label); \
605 fprintf (FILE, "-"); \
606 assemble_name (FILE, (FNAME)); \
611 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
612 ASM_OUTPUT_LIMITED_STRING macros. Each byte in the table
613 corresponds to a particular byte value [0..255]. For any
614 given byte value, if the value in the corresponding table
615 position is zero, the given character can be output directly.
616 If the table value is 1, the byte must be output as a \ooo
617 octal escape. If the tables value is anything else, then the
618 byte value should be output as a \ followed by the value
619 in the table. Note that we can use standard UN*X escape
620 sequences for many control characters, but we don't use
621 \a to represent BEL because some svr4 assemblers (e.g. on
622 the i386) don't know about that. */
625 "\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\
626 \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\
627 \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\
628 \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\
629 \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\
630 \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\
631 \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\
632 \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"
634 /* Some svr4 assemblers have a limit on the number of characters which
635 can appear in the operand of a .string directive. If your assembler
636 has such a limitation, you should define STRING_LIMIT to reflect that
637 limit. Note that at least some svr4 assemblers have a limit on the
638 actual number of bytes in the double-quoted string, and that they
639 count each character in an escape sequence as one byte. Thus, an
640 escape sequence like \377 would count as four bytes.
642 If your target assembler doesn't support the .string directive, you
643 should define this to zero.
646 #define STRING_LIMIT ((unsigned) 256)
648 #define STRING_ASM_OP ".string"
650 /* The routine used to output NUL terminated strings. We use a special
651 version of this for most svr4 targets because doing so makes the
652 generated assembly code more compact (and thus faster to assemble)
653 as well as more readable, especially for targets like the i386
654 (where the only alternative is to output character sequences as
655 comma separated lists of numbers). */
657 #define ASM_OUTPUT_LIMITED_STRING(FILE, STR) \
660 register unsigned char *_limited_str = (unsigned char *) (STR); \
661 register unsigned ch; \
662 fprintf ((FILE), "\t%s\t\"", STRING_ASM_OP); \
663 for (; ch = *_limited_str; _limited_str++) \
665 register int escape; \
666 switch (escape = ESCAPES[ch]) \
672 fprintf ((FILE), "\\%03o", ch); \
675 putc ('\\', (FILE)); \
676 putc (escape, (FILE)); \
680 fprintf ((FILE), "\"\n"); \
684 /* The routine used to output sequences of byte values. We use a special
685 version of this for most svr4 targets because doing so makes the
686 generated assembly code more compact (and thus faster to assemble)
687 as well as more readable. Note that if we find subparts of the
688 character sequence which end with NUL (and which are shorter than
689 STRING_LIMIT) we output those using ASM_OUTPUT_LIMITED_STRING. */
691 #undef ASM_OUTPUT_ASCII
692 #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \
695 register unsigned char *_ascii_bytes = (unsigned char *) (STR); \
696 register unsigned char *limit = _ascii_bytes + (LENGTH); \
697 register unsigned bytes_in_chunk = 0; \
698 for (; _ascii_bytes < limit; _ascii_bytes++) \
700 register unsigned char *p; \
701 if (bytes_in_chunk >= 60) \
703 fprintf ((FILE), "\"\n"); \
704 bytes_in_chunk = 0; \
706 for (p = _ascii_bytes; p < limit && *p != '\0'; p++) \
708 if (p < limit && (p - _ascii_bytes) <= STRING_LIMIT) \
710 if (bytes_in_chunk > 0) \
712 fprintf ((FILE), "\"\n"); \
713 bytes_in_chunk = 0; \
715 ASM_OUTPUT_LIMITED_STRING ((FILE), _ascii_bytes); \
720 register int escape; \
721 register unsigned ch; \
722 if (bytes_in_chunk == 0) \
723 fprintf ((FILE), "\t%s\t\"", ASCII_DATA_ASM_OP); \
724 switch (escape = ESCAPES[ch = *_ascii_bytes]) \
731 fprintf ((FILE), "\\%03o", ch); \
732 bytes_in_chunk += 4; \
735 putc ('\\', (FILE)); \
736 putc (escape, (FILE)); \
737 bytes_in_chunk += 2; \
742 if (bytes_in_chunk > 0) \
743 fprintf ((FILE), "\"\n"); \