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 Free Software Foundation, Inc.
4 Based on svr4.h contributed by Ron Guilmette (rfg@netcom.com).
6 This file is part of GNU CC.
8 GNU CC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU CC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU CC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
23 /* The prefix to add to user-visible assembler symbols.
25 For ELF systems the convention is *not* to prepend a leading
26 underscore onto user-level symbol names. */
28 #undef USER_LABEL_PREFIX
29 #define USER_LABEL_PREFIX ""
31 /* Biggest alignment supported by the object file format of this
32 machine. Use this macro to limit the alignment which can be
33 specified using the `__attribute__ ((aligned (N)))' construct. If
34 not defined, the default value is `BIGGEST_ALIGNMENT'. */
35 #ifndef MAX_OFILE_ALIGNMENT
36 #define MAX_OFILE_ALIGNMENT (32768 * 8)
40 #define ENDFILE_SPEC "crtend.o%s"
43 #define STARTFILE_SPEC "%{!shared: \
45 %{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}}\
48 /* Use periods rather than dollar signs in special g++ assembler names. */
50 #define NO_DOLLAR_IN_LABEL
52 /* Writing `int' for a bitfield forces int alignment for the structure. */
54 #define PCC_BITFIELD_TYPE_MATTERS 1
56 /* Implicit library calls should use memcpy, not bcopy, etc. */
58 #define TARGET_MEM_FUNCTIONS
60 /* Handle #pragma weak and #pragma pack. */
62 #define HANDLE_SYSV_PRAGMA
64 /* System V Release 4 uses DWARF debugging info. */
66 #ifndef DWARF_DEBUGGING_INFO
67 #define DWARF_DEBUGGING_INFO 1
70 /* All ELF targets can support DWARF-2. */
72 #ifndef DWARF2_DEBUGGING_INFO
73 #define DWARF2_DEBUGGING_INFO 1
76 /* Also allow them to support STABS debugging. */
80 /* The GNU tools operate better with stabs. Since we don't have
81 any native tools to be compatible with, default to stabs. */
83 #ifndef PREFERRED_DEBUGGING_TYPE
84 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
87 /* This is how to output a reference to a user-level label named NAME.
88 `assemble_name' uses this.
90 For most ELF systems the convention is *not* to prepend a leading
91 underscore onto user-level symbol names. */
93 #undef ASM_OUTPUT_LABELREF
94 #define ASM_OUTPUT_LABELREF(FILE,NAME) fprintf (FILE, "%s", NAME)
96 /* All SVR4 targets use the ELF object file format. */
97 #define OBJECT_FORMAT_ELF
100 /* Output #ident as a .ident. */
102 #define ASM_OUTPUT_IDENT(FILE, NAME) \
103 fprintf (FILE, "\t%s\t\"%s\"\n", IDENT_ASM_OP, NAME);
105 /* Attach a special .ident directive to the end of the file to identify
106 the version of GCC which compiled this code. The format of the
107 .ident string is patterned after the ones produced by native svr4
110 #define IDENT_ASM_OP ".ident"
112 #define ASM_FILE_END(FILE) \
115 if (!flag_no_ident) \
116 fprintf ((FILE), "\t%s\t\"GCC: (GNU) %s\"\n", \
117 IDENT_ASM_OP, version_string); \
122 #define ASM_BYTE_OP ".byte"
125 #define SET_ASM_OP ".set"
127 /* This is how to begin an assembly language file. Most svr4 assemblers want
128 at least a .file directive to come first, and some want to see a .version
129 directive come right after that. Here we just establish a default
130 which generates only the .file directive. If you need a .version
131 directive for any specific target, you should override this definition
132 in the target-specific file which includes this one. */
134 #undef ASM_FILE_START
135 #define ASM_FILE_START(FILE) \
136 output_file_directive ((FILE), main_input_filename)
138 /* This is how to allocate empty space in some section. The .zero
139 pseudo-op is used for this on most svr4 assemblers. */
141 #define SKIP_ASM_OP ".zero"
143 #undef ASM_OUTPUT_SKIP
144 #define ASM_OUTPUT_SKIP(FILE, SIZE) \
145 fprintf (FILE, "\t%s\t%u\n", SKIP_ASM_OP, (SIZE))
147 /* This is how to output an internal numbered label where
148 PREFIX is the class of label and NUM is the number within the class.
150 For most svr4 systems, the convention is that any symbol which begins
151 with a period is not put into the linker symbol table by the assembler. */
153 #undef ASM_OUTPUT_INTERNAL_LABEL
154 #define ASM_OUTPUT_INTERNAL_LABEL(FILE, PREFIX, NUM) \
157 fprintf (FILE, ".%s%d:\n", PREFIX, NUM); \
161 /* This is how to store into the string LABEL
162 the symbol_ref name of an internal numbered label where
163 PREFIX is the class of label and NUM is the number within the class.
164 This is suitable for output with `assemble_name'.
166 For most svr4 systems, the convention is that any symbol which begins
167 with a period is not put into the linker symbol table by the assembler. */
169 #undef ASM_GENERATE_INTERNAL_LABEL
170 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
173 sprintf (LABEL, "*.%s%d", PREFIX, (unsigned) (NUM)); \
177 /* Output the label which precedes a jumptable. Note that for all svr4
178 systems where we actually generate jumptables (which is to say every
179 svr4 target except i386, where we use casesi instead) we put the jump-
180 tables into the .rodata section and since other stuff could have been
181 put into the .rodata section prior to any given jumptable, we have to
182 make sure that the location counter for the .rodata section gets pro-
183 perly re-aligned prior to the actual beginning of the jump table. */
185 #define ALIGN_ASM_OP ".align"
187 #ifndef ASM_OUTPUT_BEFORE_CASE_LABEL
188 #define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE, PREFIX, NUM, TABLE) \
189 ASM_OUTPUT_ALIGN ((FILE), 2);
192 #undef ASM_OUTPUT_CASE_LABEL
193 #define ASM_OUTPUT_CASE_LABEL(FILE, PREFIX, NUM, JUMPTABLE) \
196 ASM_OUTPUT_BEFORE_CASE_LABEL (FILE, PREFIX, NUM, JUMPTABLE) \
197 ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM); \
201 /* The standard SVR4 assembler seems to require that certain builtin
202 library routines (e.g. .udiv) be explicitly declared as .globl
203 in each assembly file where they are referenced. */
205 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
206 ASM_GLOBALIZE_LABEL (FILE, XSTR (FUN, 0))
208 /* This says how to output assembler code to declare an
209 uninitialized external linkage data object. Under SVR4,
210 the linker seems to want the alignment of data objects
211 to depend on their types. We do exactly that here. */
213 #define COMMON_ASM_OP ".comm"
215 #undef ASM_OUTPUT_ALIGNED_COMMON
216 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
219 fprintf ((FILE), "\t%s\t", COMMON_ASM_OP); \
220 assemble_name ((FILE), (NAME)); \
221 fprintf ((FILE), ",%u,%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT); \
225 /* This says how to output assembler code to declare an
226 uninitialized internal linkage data object. Under SVR4,
227 the linker seems to want the alignment of data objects
228 to depend on their types. We do exactly that here. */
230 #define LOCAL_ASM_OP ".local"
232 #undef ASM_OUTPUT_ALIGNED_LOCAL
233 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
236 fprintf ((FILE), "\t%s\t", LOCAL_ASM_OP); \
237 assemble_name ((FILE), (NAME)); \
238 fprintf ((FILE), "\n"); \
239 ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN); \
243 /* This is the pseudo-op used to generate a 32-bit word of data with a
244 specific value in some section. This is the same for all known svr4
247 #define INT_ASM_OP ".long"
249 /* This is the pseudo-op used to generate a contiguous sequence of byte
250 values from a double-quoted string WITHOUT HAVING A TERMINATING NUL
251 AUTOMATICALLY APPENDED. This is the same for most svr4 assemblers. */
253 #undef ASCII_DATA_ASM_OP
254 #define ASCII_DATA_ASM_OP ".ascii"
256 /* Support const sections and the ctors and dtors sections for g++.
257 Note that there appears to be two different ways to support const
258 sections at the moment. You can either #define the symbol
259 READONLY_DATA_SECTION (giving it some code which switches to the
260 readonly data section) or else you can #define the symbols
261 EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and
262 SELECT_RTX_SECTION. We do both here just to be on the safe side. */
264 #define USE_CONST_SECTION 1
266 #define CONST_SECTION_ASM_OP "\t.section\t.rodata"
268 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
270 Note that we want to give these sections the SHF_WRITE attribute
271 because these sections will actually contain data (i.e. tables of
272 addresses of functions in the current root executable or shared library
273 file) and, in the case of a shared library, the relocatable addresses
274 will have to be properly resolved/relocated (and then written into) by
275 the dynamic linker when it actually attaches the given shared library
276 to the executing process. (Note that on SVR4, you may wish to use the
277 `-z text' option to the ELF linker, when building a shared library, as
278 an additional check that you are doing everything right. But if you do
279 use the `-z text' option when building a shared library, you will get
280 errors unless the .ctors and .dtors sections are marked as writable
281 via the SHF_WRITE attribute.) */
283 #define CTORS_SECTION_ASM_OP "\t.section\t.ctors,\"aw\""
284 #define DTORS_SECTION_ASM_OP "\t.section\t.dtors,\"aw\""
286 /* On svr4, we *do* have support for the .init and .fini sections, and we
287 can put stuff in there to be executed before and after `main'. We let
288 crtstuff.c and other files know this by defining the following symbols.
289 The definitions say how to change sections to the .init and .fini
290 sections. This is the same for all known svr4 assemblers. */
292 #define INIT_SECTION_ASM_OP "\t.section\t.init"
293 #define FINI_SECTION_ASM_OP "\t.section\t.fini"
295 /* A default list of other sections which we might be "in" at any given
296 time. For targets that use additional sections (e.g. .tdesc) you
297 should override this definition in the target-specific file which
298 includes this file. */
300 #undef EXTRA_SECTIONS
301 #define EXTRA_SECTIONS in_const, in_ctors, in_dtors
303 /* A default list of extra section function definitions. For targets
304 that use additional sections (e.g. .tdesc) you should override this
305 definition in the target-specific file which includes this file. */
307 #undef EXTRA_SECTION_FUNCTIONS
308 #define EXTRA_SECTION_FUNCTIONS \
309 CONST_SECTION_FUNCTION \
310 CTORS_SECTION_FUNCTION \
311 DTORS_SECTION_FUNCTION
313 #define READONLY_DATA_SECTION() const_section ()
315 #define CONST_SECTION_FUNCTION \
319 if (!USE_CONST_SECTION) \
321 else if (in_section != in_const) \
323 fprintf (asm_out_file, "\t%s\n", CONST_SECTION_ASM_OP); \
324 in_section = in_const; \
328 #define CTORS_SECTION_FUNCTION \
332 if (in_section != in_ctors) \
334 fprintf (asm_out_file, "\t%s\n", CTORS_SECTION_ASM_OP); \
335 in_section = in_ctors; \
339 #define DTORS_SECTION_FUNCTION \
343 if (in_section != in_dtors) \
345 fprintf (asm_out_file, "\t%s\n", DTORS_SECTION_ASM_OP); \
346 in_section = in_dtors; \
350 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
352 #define UNIQUE_SECTION_P(DECL) (DECL_ONE_ONLY (DECL))
354 #define UNIQUE_SECTION(DECL, RELOC) \
362 static char *prefixes[4][2] = \
364 { ".text.", ".gnu.linkonce.t." }, \
365 { ".rodata.", ".gnu.linkonce.r." }, \
366 { ".data.", ".gnu.linkonce.d." }, \
367 /* Do not generate unique sections for uninitialised \
368 data since we do not have support for this in the \
369 linker scripts yet... \
370 { ".bss.", ".gnu.linkonce.b." } */ \
374 if (TREE_CODE (DECL) == FUNCTION_DECL) \
376 else if (DECL_INITIAL (DECL) == 0 \
377 || DECL_INITIAL (DECL) == error_mark_node) \
379 else if (DECL_READONLY_SECTION (DECL, RELOC)) \
384 name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL)); \
385 prefix = prefixes[sec][DECL_ONE_ONLY(DECL)]; \
386 len = strlen (name) + strlen (prefix); \
387 string = alloca (len + 1); \
389 sprintf (string, "%s%s", prefix, name); \
391 DECL_SECTION_NAME (DECL) = build_string (len, string); \
395 /* A C statement (sans semicolon) to output an
396 element in the table of global constructors. */
397 #define ASM_OUTPUT_CONSTRUCTOR(FILE, NAME) \
401 fprintf (FILE, "\t%s\t ", INT_ASM_OP); \
402 assemble_name (FILE, NAME); \
403 fprintf (FILE, "\n"); \
407 /* A C statement (sans semicolon) to output an
408 element in the table of global destructors. */
409 #define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \
413 fprintf (FILE, "\t%s\t ", INT_ASM_OP); \
414 assemble_name (FILE, NAME); \
415 fprintf (FILE, "\n"); \
419 /* Switch into a generic section.
421 We make the section read-only and executable for a function decl,
422 read-only for a const data decl, and writable for a non-const data decl.
424 If the section has already been defined, we must not
425 emit the attributes here. The SVR4 assembler does not
426 recognize section redefinitions.
427 If DECL is NULL, no attributes are emitted. */
429 #define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME, RELOC) \
432 static struct section_info \
434 struct section_info *next; \
436 enum sect_enum {SECT_RW, SECT_RO, SECT_EXEC} type; \
438 struct section_info *s; \
440 enum sect_enum type; \
442 for (s = sections; s; s = s->next) \
443 if (!strcmp (NAME, s->name)) \
446 if (DECL && TREE_CODE (DECL) == FUNCTION_DECL) \
447 type = SECT_EXEC, mode = "ax"; \
448 else if (DECL && DECL_READONLY_SECTION (DECL, RELOC)) \
449 type = SECT_RO, mode = "a"; \
451 type = SECT_RW, mode = "aw"; \
455 s = (struct section_info *) xmalloc (sizeof (* s)); \
456 s->name = xmalloc ((strlen (NAME) + 1) * sizeof (* NAME)); \
457 strcpy (s->name, NAME); \
459 s->next = sections; \
461 fprintf (FILE, "\t.section\t%s,\"%s\",@progbits\n", \
466 if (DECL && s->type != type) \
467 error_with_decl (DECL, "%s causes a section type conflict");\
469 fprintf (FILE, "\t.section\t%s\n", NAME); \
474 /* A C statement or statements to switch to the appropriate
475 section for output of RTX in mode MODE. RTX is some kind
476 of constant in RTL. The argument MODE is redundant except
477 in the case of a `const_int' rtx. Currently, these always
478 go into the const section. */
480 #undef SELECT_RTX_SECTION
481 #define SELECT_RTX_SECTION(MODE, RTX) const_section ()
483 /* A C statement or statements to switch to the appropriate
484 section for output of DECL. DECL is either a `VAR_DECL' node
485 or a constant of some sort. RELOC indicates whether forming
486 the initial value of DECL requires link-time relocations. */
488 #define SELECT_SECTION(DECL, RELOC) \
490 if (TREE_CODE (DECL) == STRING_CST) \
492 if (! flag_writable_strings) \
497 else if (TREE_CODE (DECL) == VAR_DECL) \
499 if ((flag_pic && RELOC) \
500 || !TREE_READONLY (DECL) || TREE_SIDE_EFFECTS (DECL) \
501 || !DECL_INITIAL (DECL) \
502 || (DECL_INITIAL (DECL) != error_mark_node \
503 && !TREE_CONSTANT (DECL_INITIAL (DECL)))) \
512 /* Define the strings used for the special svr4 .type and .size directives.
513 These strings generally do not vary from one system running svr4 to
514 another, but if a given system (e.g. m88k running svr) needs to use
515 different pseudo-op names for these, they may be overridden in the
516 file which includes this one. */
518 #define TYPE_ASM_OP ".type"
519 #define SIZE_ASM_OP ".size"
521 /* This is how we tell the assembler that a symbol is weak. */
523 #define ASM_WEAKEN_LABEL(FILE, NAME) \
526 fputs ("\t.weak\t", (FILE)); \
527 assemble_name ((FILE), (NAME)); \
528 fputc ('\n', (FILE)); \
532 /* The following macro defines the format used to output the second
533 operand of the .type assembler directive. Different svr4 assemblers
534 expect various different forms for this operand. The one given here
535 is just a default. You may need to override it in your machine-
536 specific tm.h file (depending upon the particulars of your assembler). */
538 #define TYPE_OPERAND_FMT "@%s"
540 /* Write the extra assembler code needed to declare a function's result.
541 Most svr4 assemblers don't require any special declaration of the
542 result value, but there are exceptions. */
544 #ifndef ASM_DECLARE_RESULT
545 #define ASM_DECLARE_RESULT(FILE, RESULT)
548 /* These macros generate the special .type and .size directives which
549 are used to set the corresponding fields of the linker symbol table
550 entries in an ELF object file under SVR4. These macros also output
551 the starting labels for the relevant functions/objects. */
553 /* Write the extra assembler code needed to declare a function properly.
554 Some svr4 assemblers need to also have something extra said about the
555 function's return value. We allow for that here. */
557 #ifndef ASM_DECLARE_FUNCTION_NAME
558 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
561 fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
562 assemble_name (FILE, NAME); \
564 fprintf (FILE, TYPE_OPERAND_FMT, "function"); \
567 ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
568 ASM_OUTPUT_LABEL(FILE, NAME); \
573 /* Write the extra assembler code needed to declare an object properly. */
575 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
578 fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
579 assemble_name (FILE, NAME); \
581 fprintf (FILE, TYPE_OPERAND_FMT, "object"); \
584 size_directive_output = 0; \
586 if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \
588 size_directive_output = 1; \
589 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
590 assemble_name (FILE, NAME); \
592 fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, \
593 int_size_in_bytes (TREE_TYPE (DECL))); \
594 fputc ('\n', FILE); \
597 ASM_OUTPUT_LABEL (FILE, NAME); \
601 /* Output the size directive for a decl in rest_of_decl_compilation
602 in the case where we did not do so before the initializer.
603 Once we find the error_mark_node, we know that the value of
604 size_directive_output was set
605 by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */
607 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)\
610 const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \
612 if (!flag_inhibit_size_directive \
613 && DECL_SIZE (DECL) \
614 && ! AT_END && TOP_LEVEL \
615 && DECL_INITIAL (DECL) == error_mark_node \
616 && !size_directive_output) \
618 size_directive_output = 1; \
619 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
620 assemble_name (FILE, name); \
622 fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, \
623 int_size_in_bytes (TREE_TYPE (DECL))); \
624 fputc ('\n', FILE); \
629 /* This is how to declare the size of a function. */
630 #ifndef ASM_DECLARE_FUNCTION_SIZE
631 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
634 if (!flag_inhibit_size_directive) \
637 static int labelno; \
641 ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno); \
642 ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno); \
644 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
645 assemble_name (FILE, (FNAME)); \
646 fprintf (FILE, ","); \
647 assemble_name (FILE, label); \
648 fprintf (FILE, "-"); \
649 assemble_name (FILE, (FNAME)); \
656 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
657 ASM_OUTPUT_LIMITED_STRING macros. Each byte in the table
658 corresponds to a particular byte value [0..255]. For any
659 given byte value, if the value in the corresponding table
660 position is zero, the given character can be output directly.
661 If the table value is 1, the byte must be output as a \ooo
662 octal escape. If the tables value is anything else, then the
663 byte value should be output as a \ followed by the value
664 in the table. Note that we can use standard UN*X escape
665 sequences for many control characters, but we don't use
666 \a to represent BEL because some svr4 assemblers (e.g. on
667 the i386) don't know about that. Also, we don't use \v
668 since some versions of gas, such as 2.2 did not accept it. */
671 "\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\
672 \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\
673 \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\
674 \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\
675 \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\
676 \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\
677 \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\
678 \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"
680 /* Some svr4 assemblers have a limit on the number of characters which
681 can appear in the operand of a .string directive. If your assembler
682 has such a limitation, you should define STRING_LIMIT to reflect that
683 limit. Note that at least some svr4 assemblers have a limit on the
684 actual number of bytes in the double-quoted string, and that they
685 count each character in an escape sequence as one byte. Thus, an
686 escape sequence like \377 would count as four bytes.
688 If your target assembler doesn't support the .string directive, you
689 should define this to zero.
692 #define STRING_LIMIT ((unsigned) 256)
694 #define STRING_ASM_OP ".string"
696 /* The routine used to output NUL terminated strings. We use a special
697 version of this for most svr4 targets because doing so makes the
698 generated assembly code more compact (and thus faster to assemble)
699 as well as more readable, especially for targets like the i386
700 (where the only alternative is to output character sequences as
701 comma separated lists of numbers). */
703 #define ASM_OUTPUT_LIMITED_STRING(FILE, STR) \
706 register const unsigned char *_limited_str = \
707 (const unsigned char *) (STR); \
708 register unsigned ch; \
710 fprintf ((FILE), "\t%s\t\"", STRING_ASM_OP); \
712 for (; (ch = *_limited_str); _limited_str++) \
714 register int escape; \
716 switch (escape = ESCAPES[ch]) \
722 fprintf ((FILE), "\\%03o", ch); \
725 putc ('\\', (FILE)); \
726 putc (escape, (FILE)); \
731 fprintf ((FILE), "\"\n"); \
735 /* The routine used to output sequences of byte values. We use a special
736 version of this for most svr4 targets because doing so makes the
737 generated assembly code more compact (and thus faster to assemble)
738 as well as more readable. Note that if we find subparts of the
739 character sequence which end with NUL (and which are shorter than
740 STRING_LIMIT) we output those using ASM_OUTPUT_LIMITED_STRING. */
742 #undef ASM_OUTPUT_ASCII
743 #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \
746 register const unsigned char *_ascii_bytes = \
747 (const unsigned char *) (STR); \
748 register const unsigned char *limit = _ascii_bytes + (LENGTH); \
749 register unsigned bytes_in_chunk = 0; \
751 for (; _ascii_bytes < limit; _ascii_bytes++) \
753 register const unsigned char *p; \
755 if (bytes_in_chunk >= 60) \
757 fprintf ((FILE), "\"\n"); \
758 bytes_in_chunk = 0; \
761 for (p = _ascii_bytes; p < limit && *p != '\0'; p++) \
764 if (p < limit && (p - _ascii_bytes) <= (long)STRING_LIMIT) \
766 if (bytes_in_chunk > 0) \
768 fprintf ((FILE), "\"\n"); \
769 bytes_in_chunk = 0; \
772 ASM_OUTPUT_LIMITED_STRING ((FILE), _ascii_bytes); \
777 register int escape; \
778 register unsigned ch; \
780 if (bytes_in_chunk == 0) \
781 fprintf ((FILE), "\t%s\t\"", ASCII_DATA_ASM_OP); \
783 switch (escape = ESCAPES[ch = *_ascii_bytes]) \
790 fprintf ((FILE), "\\%03o", ch); \
791 bytes_in_chunk += 4; \
794 putc ('\\', (FILE)); \
795 putc (escape, (FILE)); \
796 bytes_in_chunk += 2; \
802 if (bytes_in_chunk > 0) \
803 fprintf ((FILE), "\"\n"); \