1 /* Operating system specific defines to be used when targeting GCC for some
2 generic System V Release 4 system.
3 Copyright (C) 1991, 94-98, 1999 Free Software Foundation, Inc.
4 Contributed by Ron Guilmette (rfg@monkeys.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 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 /* Define a symbol indicating that we are using svr4.h. */
45 /* For the sake of libgcc2.c, indicate target supports atexit. */
48 /* Cpp, assembler, linker, library, and startfile spec's. */
50 /* This defines which switch letters take arguments. On svr4, most of
51 the normal cases (defined in gcc.c) apply, and we also have -h* and
52 -z* options (for the linker). Note however that there is no such
53 thing as a -T option for svr4. */
55 #define SWITCH_TAKES_ARG(CHAR) \
56 (DEFAULT_SWITCH_TAKES_ARG (CHAR) \
61 /* This defines which multi-letter switches take arguments. On svr4,
62 there are no such switches except those implemented by GCC itself. */
64 #define WORD_SWITCH_TAKES_ARG(STR) \
65 (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) \
66 && strcmp (STR, "Tdata") && strcmp (STR, "Ttext") \
67 && strcmp (STR, "Tbss"))
69 /* You should redefine CPP_PREDEFINES in any file which includes this one.
70 The definition should be appropriate for the type of target system
71 involved, and it should include any -A (assertion) options which are
72 appropriate for the given target system. */
75 /* Provide an ASM_SPEC appropriate for svr4. Here we try to support as
76 many of the specialized svr4 assembler options as seems reasonable,
77 given that there are certain options which we can't (or shouldn't)
78 support directly due to the fact that they conflict with other options
79 for other svr4 tools (e.g. ld) or with other options for GCC itself.
80 For example, we don't support the -o (output file) or -R (remove
81 input file) options because GCC already handles these things. We
82 also don't support the -m (run m4) option for the assembler because
83 that conflicts with the -m (produce load map) option of the svr4
84 linker. We do however allow passing arbitrary options to the svr4
85 assembler via the -Wa, option.
87 Note that gcc doesn't allow a space to follow -Y in a -Ym,* or -Yd,*
93 "%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
95 /* svr4 assemblers need the `-' (indicating input from stdin) to come after
96 the -o option (and its argument) for some reason. If we try to put it
97 before the -o option, the assembler will try to read the file named as
98 the output file in the -o option as an input file (after it has already
99 written some stuff to it) and the binary stuff contained therein will
100 cause totally confuse the assembler, resulting in many spurious error
103 #undef ASM_FINAL_SPEC
104 #define ASM_FINAL_SPEC "%|"
106 /* Under svr4, the normal location of the `ld' and `as' programs is the
107 /usr/ccs/bin directory. */
109 #ifndef CROSS_COMPILE
110 #undef MD_EXEC_PREFIX
111 #define MD_EXEC_PREFIX "/usr/ccs/bin/"
114 /* Under svr4, the normal location of the various *crt*.o files is the
115 /usr/ccs/lib directory. */
117 #ifndef CROSS_COMPILE
118 #undef MD_STARTFILE_PREFIX
119 #define MD_STARTFILE_PREFIX "/usr/ccs/lib/"
122 /* Provide a LIB_SPEC appropriate for svr4. Here we tack on the default
123 standard C library (unless we are building a shared library). */
126 #define LIB_SPEC "%{!shared:%{!symbolic:-lc}}"
128 /* Provide an ENDFILE_SPEC appropriate for svr4. Here we tack on our own
129 magical crtend.o file (see crtstuff.c) which provides part of the
130 support for getting C++ file-scope static object constructed before
131 entering `main', followed by the normal svr3/svr4 "finalizer" file,
132 which is either `gcrtn.o' or `crtn.o'. */
135 #define ENDFILE_SPEC "crtend.o%s %{pg:gcrtn.o%s}%{!pg:crtn.o%s}"
137 /* Provide a LINK_SPEC appropriate for svr4. Here we provide support
138 for the special GCC options -static, -shared, and -symbolic which
139 allow us to link things in one of these three modes by applying the
140 appropriate combinations of options at link-time. We also provide
141 support here for as many of the other svr4 linker options as seems
142 reasonable, given that some of them conflict with options for other
143 svr4 tools (e.g. the assembler). In particular, we do support the
144 -z*, -V, -b, -t, -Qy, -Qn, and -YP* options here, and the -e*,
145 -l*, -o*, -r, -s, -u*, and -L* options are directly supported
146 by gcc.c itself. We don't directly support the -m (generate load
147 map) option because that conflicts with the -m (run m4) option of
148 the svr4 assembler. We also don't directly support the svr4 linker's
149 -I* or -M* options because these conflict with existing GCC options.
150 We do however allow passing arbitrary options to the svr4 linker
151 via the -Wl, option. We don't support the svr4 linker's -a option
152 at all because it is totally useless and because it conflicts with
155 Note that gcc doesn't allow a space to follow -Y in a -YP,* option.
157 When the -G link option is used (-shared and -symbolic) a final link is
162 #define LINK_SPEC "%{h*} %{v:-V} \
164 %{static:-dn -Bstatic} \
165 %{shared:-G -dy -z text} \
166 %{symbolic:-Bsymbolic -G -dy -z text} \
171 #define LINK_SPEC "%{h*} %{v:-V} \
173 %{static:-dn -Bstatic} \
174 %{shared:-G -dy -z text} \
175 %{symbolic:-Bsymbolic -G -dy -z text} \
178 %{!YP,*:%{p:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
179 %{!p:-Y P,/usr/ccs/lib:/usr/lib}} \
183 /* Gcc automatically adds in one of the files /usr/ccs/lib/values-Xc.o,
184 /usr/ccs/lib/values-Xa.o, or /usr/ccs/lib/values-Xt.o for each final
185 link step (depending upon the other gcc options selected, such as
186 -traditional and -ansi). These files each contain one (initialized)
187 copy of a special variable called `_lib_version'. Each one of these
188 files has `_lib_version' initialized to a different (enum) value.
189 The SVR4 library routines query the value of `_lib_version' at run
190 to decide how they should behave. Specifically, they decide (based
191 upon the value of `_lib_version') if they will act in a strictly ANSI
192 conforming manner or not.
195 #undef STARTFILE_SPEC
196 #define STARTFILE_SPEC "%{!shared: \
198 %{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}}}\
199 %{pg:gcrti.o%s}%{!pg:crti.o%s} \
200 %{ansi:values-Xc.o%s} \
202 %{traditional:values-Xt.o%s} \
203 %{!traditional:values-Xa.o%s}} \
206 /* Attach a special .ident directive to the end of the file to identify
207 the version of GCC which compiled this code. The format of the
208 .ident string is patterned after the ones produced by native svr4
211 #define IDENT_ASM_OP ".ident"
213 #define ASM_FILE_END(FILE) \
215 if (!flag_no_ident) \
216 fprintf ((FILE), "\t%s\t\"GCC: (GNU) %s\"\n", \
217 IDENT_ASM_OP, version_string); \
220 /* Allow #sccs in preprocessor. */
222 #define SCCS_DIRECTIVE
224 /* Output #ident as a .ident. */
226 #define ASM_OUTPUT_IDENT(FILE, NAME) \
227 fprintf (FILE, "\t%s\t\"%s\"\n", IDENT_ASM_OP, NAME);
229 /* Use periods rather than dollar signs in special g++ assembler names. */
231 #define NO_DOLLAR_IN_LABEL
233 /* Writing `int' for a bitfield forces int alignment for the structure. */
235 #define PCC_BITFIELD_TYPE_MATTERS 1
237 /* Implicit library calls should use memcpy, not bcopy, etc. */
239 #define TARGET_MEM_FUNCTIONS
241 /* Handle #pragma weak and #pragma pack. */
243 #define HANDLE_SYSV_PRAGMA
245 /* System V Release 4 uses DWARF debugging info. */
247 #define DWARF_DEBUGGING_INFO
249 /* All ELF targets can support DWARF-2. */
250 #ifndef DWARF2_DEBUGGING_INFO
251 #define DWARF2_DEBUGGING_INFO
254 /* The numbers used to denote specific machine registers in the System V
255 Release 4 DWARF debugging information are quite likely to be totally
256 different from the numbers used in BSD stabs debugging information
257 for the same kind of target machine. Thus, we undefine the macro
258 DBX_REGISTER_NUMBER here as an extra inducement to get people to
259 provide proper machine-specific definitions of DBX_REGISTER_NUMBER
260 (which is also used to provide DWARF registers numbers in dwarfout.c)
261 in their tm.h files which include this file. */
263 #undef DBX_REGISTER_NUMBER
265 /* Use DWARF debugging info by default. */
267 #ifndef PREFERRED_DEBUGGING_TYPE
268 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
271 /* But allow STABS to be supoorted as well. */
274 /* Define the actual types of some ANSI-mandated types. (These
275 definitions should work for most SVR4 systems). */
278 #define SIZE_TYPE "unsigned int"
281 #define PTRDIFF_TYPE "int"
284 #define WCHAR_TYPE "long int"
286 #undef WCHAR_TYPE_SIZE
287 #define WCHAR_TYPE_SIZE BITS_PER_WORD
289 /* This causes trouble, because it requires the host machine
290 to support ANSI C. */
291 /* #define MULTIBYTE_CHARS */
294 #define ASM_BYTE_OP ".byte"
297 #define SET_ASM_OP ".set"
299 /* This is how to begin an assembly language file. Most svr4 assemblers want
300 at least a .file directive to come first, and some want to see a .version
301 directive come right after that. Here we just establish a default
302 which generates only the .file directive. If you need a .version
303 directive for any specific target, you should override this definition
304 in the target-specific file which includes this one. */
306 #undef ASM_FILE_START
307 #define ASM_FILE_START(FILE) \
308 output_file_directive ((FILE), main_input_filename)
310 /* This is how to allocate empty space in some section. The .zero
311 pseudo-op is used for this on most svr4 assemblers. */
313 #define SKIP_ASM_OP ".zero"
315 #undef ASM_OUTPUT_SKIP
316 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
317 fprintf (FILE, "\t%s\t%u\n", SKIP_ASM_OP, (SIZE))
319 /* The prefix to add to user-visible assembler symbols.
321 For System V Release 4 the convention is *not* to prepend a leading
322 underscore onto user-level symbol names. */
324 #undef USER_LABEL_PREFIX
325 #define USER_LABEL_PREFIX ""
327 /* This is how to output an internal numbered label where
328 PREFIX is the class of label and NUM is the number within the class.
330 For most svr4 systems, the convention is that any symbol which begins
331 with a period is not put into the linker symbol table by the assembler. */
333 #undef ASM_OUTPUT_INTERNAL_LABEL
334 #define ASM_OUTPUT_INTERNAL_LABEL(FILE, PREFIX, NUM) \
336 fprintf (FILE, ".%s%d:\n", PREFIX, NUM); \
339 /* This is how to store into the string LABEL
340 the symbol_ref name of an internal numbered label where
341 PREFIX is the class of label and NUM is the number within the class.
342 This is suitable for output with `assemble_name'.
344 For most svr4 systems, the convention is that any symbol which begins
345 with a period is not put into the linker symbol table by the assembler. */
347 #undef ASM_GENERATE_INTERNAL_LABEL
348 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
350 sprintf (LABEL, "*.%s%d", PREFIX, (unsigned) (NUM)); \
353 /* Output the label which precedes a jumptable. Note that for all svr4
354 systems where we actually generate jumptables (which is to say every
355 svr4 target except i386, where we use casesi instead) we put the jump-
356 tables into the .rodata section and since other stuff could have been
357 put into the .rodata section prior to any given jumptable, we have to
358 make sure that the location counter for the .rodata section gets pro-
359 perly re-aligned prior to the actual beginning of the jump table. */
361 #define ALIGN_ASM_OP ".align"
363 #ifndef ASM_OUTPUT_BEFORE_CASE_LABEL
364 #define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE,PREFIX,NUM,TABLE) \
365 ASM_OUTPUT_ALIGN ((FILE), 2);
368 #undef ASM_OUTPUT_CASE_LABEL
369 #define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,JUMPTABLE) \
371 ASM_OUTPUT_BEFORE_CASE_LABEL (FILE, PREFIX, NUM, JUMPTABLE) \
372 ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM); \
375 /* The standard SVR4 assembler seems to require that certain builtin
376 library routines (e.g. .udiv) be explicitly declared as .globl
377 in each assembly file where they are referenced. */
379 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
380 ASM_GLOBALIZE_LABEL (FILE, XSTR (FUN, 0))
382 /* This says how to output assembler code to declare an
383 uninitialized external linkage data object. Under SVR4,
384 the linker seems to want the alignment of data objects
385 to depend on their types. We do exactly that here. */
387 #define COMMON_ASM_OP ".comm"
389 #undef ASM_OUTPUT_ALIGNED_COMMON
390 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
392 fprintf ((FILE), "\t%s\t", COMMON_ASM_OP); \
393 assemble_name ((FILE), (NAME)); \
394 fprintf ((FILE), ",%u,%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT); \
397 /* This says how to output assembler code to declare an
398 uninitialized internal linkage data object. Under SVR4,
399 the linker seems to want the alignment of data objects
400 to depend on their types. We do exactly that here. */
402 #define LOCAL_ASM_OP ".local"
404 #undef ASM_OUTPUT_ALIGNED_LOCAL
405 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
407 fprintf ((FILE), "\t%s\t", LOCAL_ASM_OP); \
408 assemble_name ((FILE), (NAME)); \
409 fprintf ((FILE), "\n"); \
410 ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN); \
413 /* Biggest alignment supported by the object file format of this
414 machine. Use this macro to limit the alignment which can be
415 specified using the `__attribute__ ((aligned (N)))' construct. If
416 not defined, the default value is `BIGGEST_ALIGNMENT'. */
418 #define MAX_OFILE_ALIGNMENT (32768*8)
420 /* This is the pseudo-op used to generate a 32-bit word of data with a
421 specific value in some section. This is the same for all known svr4
424 #define INT_ASM_OP ".long"
426 /* This is the pseudo-op used to generate a contiguous sequence of byte
427 values from a double-quoted string WITHOUT HAVING A TERMINATING NUL
428 AUTOMATICALLY APPENDED. This is the same for most svr4 assemblers. */
430 #undef ASCII_DATA_ASM_OP
431 #define ASCII_DATA_ASM_OP ".ascii"
433 /* Support const sections and the ctors and dtors sections for g++.
434 Note that there appears to be two different ways to support const
435 sections at the moment. You can either #define the symbol
436 READONLY_DATA_SECTION (giving it some code which switches to the
437 readonly data section) or else you can #define the symbols
438 EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and
439 SELECT_RTX_SECTION. We do both here just to be on the safe side. */
441 #define USE_CONST_SECTION 1
443 #define CONST_SECTION_ASM_OP ".section\t.rodata"
445 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
447 Note that we want to give these sections the SHF_WRITE attribute
448 because these sections will actually contain data (i.e. tables of
449 addresses of functions in the current root executable or shared library
450 file) and, in the case of a shared library, the relocatable addresses
451 will have to be properly resolved/relocated (and then written into) by
452 the dynamic linker when it actually attaches the given shared library
453 to the executing process. (Note that on SVR4, you may wish to use the
454 `-z text' option to the ELF linker, when building a shared library, as
455 an additional check that you are doing everything right. But if you do
456 use the `-z text' option when building a shared library, you will get
457 errors unless the .ctors and .dtors sections are marked as writable
458 via the SHF_WRITE attribute.) */
460 #define CTORS_SECTION_ASM_OP ".section\t.ctors,\"aw\""
461 #define DTORS_SECTION_ASM_OP ".section\t.dtors,\"aw\""
463 /* On svr4, we *do* have support for the .init and .fini sections, and we
464 can put stuff in there to be executed before and after `main'. We let
465 crtstuff.c and other files know this by defining the following symbols.
466 The definitions say how to change sections to the .init and .fini
467 sections. This is the same for all known svr4 assemblers. */
469 #define INIT_SECTION_ASM_OP ".section\t.init"
470 #define FINI_SECTION_ASM_OP ".section\t.fini"
472 /* A default list of other sections which we might be "in" at any given
473 time. For targets that use additional sections (e.g. .tdesc) you
474 should override this definition in the target-specific file which
475 includes this file. */
477 #undef EXTRA_SECTIONS
478 #define EXTRA_SECTIONS in_const, in_ctors, in_dtors
480 /* A default list of extra section function definitions. For targets
481 that use additional sections (e.g. .tdesc) you should override this
482 definition in the target-specific file which includes this file. */
484 #undef EXTRA_SECTION_FUNCTIONS
485 #define EXTRA_SECTION_FUNCTIONS \
486 CONST_SECTION_FUNCTION \
487 CTORS_SECTION_FUNCTION \
488 DTORS_SECTION_FUNCTION
490 #define READONLY_DATA_SECTION() const_section ()
492 extern void text_section ();
494 #define CONST_SECTION_FUNCTION \
498 if (!USE_CONST_SECTION) \
500 else if (in_section != in_const) \
502 fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP); \
503 in_section = in_const; \
507 #define CTORS_SECTION_FUNCTION \
511 if (in_section != in_ctors) \
513 fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP); \
514 in_section = in_ctors; \
518 #define DTORS_SECTION_FUNCTION \
522 if (in_section != in_dtors) \
524 fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP); \
525 in_section = in_dtors; \
529 /* Switch into a generic section.
531 We make the section read-only and executable for a function decl,
532 read-only for a const data decl, and writable for a non-const data decl.
534 If the section has already been defined, we must not
535 emit the attributes here. The SVR4 assembler does not
536 recognize section redefinitions.
537 If DECL is NULL, no attributes are emitted. */
539 #define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME, RELOC) \
541 static struct section_info \
543 struct section_info *next; \
545 enum sect_enum {SECT_RW, SECT_RO, SECT_EXEC} type; \
547 struct section_info *s; \
549 enum sect_enum type; \
551 for (s = sections; s; s = s->next) \
552 if (!strcmp (NAME, s->name)) \
555 if (DECL && TREE_CODE (DECL) == FUNCTION_DECL) \
556 type = SECT_EXEC, mode = "ax"; \
557 else if (DECL && DECL_READONLY_SECTION (DECL, RELOC)) \
558 type = SECT_RO, mode = "a"; \
560 type = SECT_RW, mode = "aw"; \
564 s = (struct section_info *) xmalloc (sizeof (struct section_info)); \
565 s->name = xmalloc ((strlen (NAME) + 1) * sizeof (*NAME)); \
566 strcpy (s->name, NAME); \
568 s->next = sections; \
570 fprintf (FILE, ".section\t%s,\"%s\",@progbits\n", NAME, mode); \
574 if (DECL && s->type != type) \
575 error_with_decl (DECL, "%s causes a section type conflict"); \
577 fprintf (FILE, ".section\t%s\n", NAME); \
581 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
582 #define UNIQUE_SECTION_P(DECL) (DECL_ONE_ONLY (DECL))
583 #define UNIQUE_SECTION(DECL,RELOC) \
586 char *name, *string, *prefix; \
588 name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL)); \
590 if (! DECL_ONE_ONLY (DECL)) \
593 if (TREE_CODE (DECL) == FUNCTION_DECL) \
595 else if (DECL_READONLY_SECTION (DECL, RELOC)) \
596 prefix = ".rodata."; \
600 else if (TREE_CODE (DECL) == FUNCTION_DECL) \
601 prefix = ".gnu.linkonce.t."; \
602 else if (DECL_READONLY_SECTION (DECL, RELOC)) \
603 prefix = ".gnu.linkonce.r."; \
605 prefix = ".gnu.linkonce.d."; \
607 len = strlen (name) + strlen (prefix); \
608 string = alloca (len + 1); \
609 sprintf (string, "%s%s", prefix, name); \
611 DECL_SECTION_NAME (DECL) = build_string (len, string); \
613 /* A C statement (sans semicolon) to output an element in the table of
614 global constructors. */
615 #define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \
618 fprintf (FILE, "\t%s\t ", INT_ASM_OP); \
619 assemble_name (FILE, NAME); \
620 fprintf (FILE, "\n"); \
623 /* A C statement (sans semicolon) to output an element in the table of
624 global destructors. */
625 #define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \
628 fprintf (FILE, "\t%s\t ", INT_ASM_OP); \
629 assemble_name (FILE, NAME); \
630 fprintf (FILE, "\n"); \
633 /* A C statement or statements to switch to the appropriate
634 section for output of DECL. DECL is either a `VAR_DECL' node
635 or a constant of some sort. RELOC indicates whether forming
636 the initial value of DECL requires link-time relocations. */
638 #define SELECT_SECTION(DECL,RELOC) \
640 if (flag_pic && RELOC) \
642 else if (TREE_CODE (DECL) == STRING_CST) \
644 if (! flag_writable_strings) \
649 else if (TREE_CODE (DECL) == VAR_DECL) \
651 if (! DECL_READONLY_SECTION (DECL, RELOC)) \
660 /* A C statement or statements to switch to the appropriate
661 section for output of RTX in mode MODE. RTX is some kind
662 of constant in RTL. The argument MODE is redundant except
663 in the case of a `const_int' rtx. Currently, these always
664 go into the const section. */
666 #undef SELECT_RTX_SECTION
667 #define SELECT_RTX_SECTION(MODE,RTX) const_section()
669 /* Define the strings used for the special svr4 .type and .size directives.
670 These strings generally do not vary from one system running svr4 to
671 another, but if a given system (e.g. m88k running svr) needs to use
672 different pseudo-op names for these, they may be overridden in the
673 file which includes this one. */
675 #define TYPE_ASM_OP ".type"
676 #define SIZE_ASM_OP ".size"
678 /* This is how we tell the assembler that a symbol is weak. */
680 #define ASM_WEAKEN_LABEL(FILE,NAME) \
681 do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \
682 fputc ('\n', FILE); } while (0)
684 /* The following macro defines the format used to output the second
685 operand of the .type assembler directive. Different svr4 assemblers
686 expect various different forms for this operand. The one given here
687 is just a default. You may need to override it in your machine-
688 specific tm.h file (depending upon the particulars of your assembler). */
690 #define TYPE_OPERAND_FMT "@%s"
692 /* Write the extra assembler code needed to declare a function's result.
693 Most svr4 assemblers don't require any special declaration of the
694 result value, but there are exceptions. */
696 #ifndef ASM_DECLARE_RESULT
697 #define ASM_DECLARE_RESULT(FILE, RESULT)
700 /* These macros generate the special .type and .size directives which
701 are used to set the corresponding fields of the linker symbol table
702 entries in an ELF object file under SVR4. These macros also output
703 the starting labels for the relevant functions/objects. */
705 /* Write the extra assembler code needed to declare a function properly.
706 Some svr4 assemblers need to also have something extra said about the
707 function's return value. We allow for that here. */
709 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
711 fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
712 assemble_name (FILE, NAME); \
714 fprintf (FILE, TYPE_OPERAND_FMT, "function"); \
716 ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
717 ASM_OUTPUT_LABEL(FILE, NAME); \
720 /* Write the extra assembler code needed to declare an object properly. */
722 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
724 fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
725 assemble_name (FILE, NAME); \
727 fprintf (FILE, TYPE_OPERAND_FMT, "object"); \
729 size_directive_output = 0; \
730 if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \
732 size_directive_output = 1; \
733 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
734 assemble_name (FILE, NAME); \
736 fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, \
737 int_size_in_bytes (TREE_TYPE (DECL))); \
738 fputc ('\n', FILE); \
740 ASM_OUTPUT_LABEL(FILE, NAME); \
743 /* Output the size directive for a decl in rest_of_decl_compilation
744 in the case where we did not do so before the initializer.
745 Once we find the error_mark_node, we know that the value of
746 size_directive_output was set
747 by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */
749 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \
751 char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \
752 if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \
753 && ! AT_END && TOP_LEVEL \
754 && DECL_INITIAL (DECL) == error_mark_node \
755 && !size_directive_output) \
757 size_directive_output = 1; \
758 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
759 assemble_name (FILE, name); \
761 fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, \
762 int_size_in_bytes (TREE_TYPE (DECL))); \
763 fputc ('\n', FILE); \
767 /* This is how to declare the size of a function. */
769 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
771 if (!flag_inhibit_size_directive) \
774 static int labelno; \
776 ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno); \
777 ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno); \
778 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
779 assemble_name (FILE, (FNAME)); \
780 fprintf (FILE, ","); \
781 assemble_name (FILE, label); \
782 fprintf (FILE, "-"); \
783 assemble_name (FILE, (FNAME)); \
788 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
789 ASM_OUTPUT_LIMITED_STRING macros. Each byte in the table
790 corresponds to a particular byte value [0..255]. For any
791 given byte value, if the value in the corresponding table
792 position is zero, the given character can be output directly.
793 If the table value is 1, the byte must be output as a \ooo
794 octal escape. If the tables value is anything else, then the
795 byte value should be output as a \ followed by the value
796 in the table. Note that we can use standard UN*X escape
797 sequences for many control characters, but we don't use
798 \a to represent BEL because some svr4 assemblers (e.g. on
799 the i386) don't know about that. Also, we don't use \v
800 since some versions of gas, such as 2.2 did not accept it. */
803 "\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\
804 \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\
805 \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\
806 \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\
807 \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\
808 \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\
809 \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\
810 \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"
812 /* Some svr4 assemblers have a limit on the number of characters which
813 can appear in the operand of a .string directive. If your assembler
814 has such a limitation, you should define STRING_LIMIT to reflect that
815 limit. Note that at least some svr4 assemblers have a limit on the
816 actual number of bytes in the double-quoted string, and that they
817 count each character in an escape sequence as one byte. Thus, an
818 escape sequence like \377 would count as four bytes.
820 If your target assembler doesn't support the .string directive, you
821 should define this to zero.
824 #define STRING_LIMIT ((unsigned) 256)
826 #define STRING_ASM_OP ".string"
828 /* The routine used to output NUL terminated strings. We use a special
829 version of this for most svr4 targets because doing so makes the
830 generated assembly code more compact (and thus faster to assemble)
831 as well as more readable, especially for targets like the i386
832 (where the only alternative is to output character sequences as
833 comma separated lists of numbers). */
835 #define ASM_OUTPUT_LIMITED_STRING(FILE, STR) \
838 register unsigned char *_limited_str = (unsigned char *) (STR); \
839 register unsigned ch; \
840 fprintf ((FILE), "\t%s\t\"", STRING_ASM_OP); \
841 for (; (ch = *_limited_str); _limited_str++) \
843 register int escape; \
844 switch (escape = ESCAPES[ch]) \
850 fprintf ((FILE), "\\%03o", ch); \
853 putc ('\\', (FILE)); \
854 putc (escape, (FILE)); \
858 fprintf ((FILE), "\"\n"); \
862 /* The routine used to output sequences of byte values. We use a special
863 version of this for most svr4 targets because doing so makes the
864 generated assembly code more compact (and thus faster to assemble)
865 as well as more readable. Note that if we find subparts of the
866 character sequence which end with NUL (and which are shorter than
867 STRING_LIMIT) we output those using ASM_OUTPUT_LIMITED_STRING. */
869 #undef ASM_OUTPUT_ASCII
870 #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \
873 register unsigned char *_ascii_bytes = (unsigned char *) (STR); \
874 register unsigned char *limit = _ascii_bytes + (LENGTH); \
875 register unsigned bytes_in_chunk = 0; \
876 for (; _ascii_bytes < limit; _ascii_bytes++) \
878 register unsigned char *p; \
879 if (bytes_in_chunk >= 60) \
881 fprintf ((FILE), "\"\n"); \
882 bytes_in_chunk = 0; \
884 for (p = _ascii_bytes; p < limit && *p != '\0'; p++) \
886 if (p < limit && (p - _ascii_bytes) <= (long)STRING_LIMIT) \
888 if (bytes_in_chunk > 0) \
890 fprintf ((FILE), "\"\n"); \
891 bytes_in_chunk = 0; \
893 ASM_OUTPUT_LIMITED_STRING ((FILE), _ascii_bytes); \
898 register int escape; \
899 register unsigned ch; \
900 if (bytes_in_chunk == 0) \
901 fprintf ((FILE), "\t%s\t\"", ASCII_DATA_ASM_OP); \
902 switch (escape = ESCAPES[ch = *_ascii_bytes]) \
909 fprintf ((FILE), "\\%03o", ch); \
910 bytes_in_chunk += 4; \
913 putc ('\\', (FILE)); \
914 putc (escape, (FILE)); \
915 bytes_in_chunk += 2; \
920 if (bytes_in_chunk > 0) \
921 fprintf ((FILE), "\"\n"); \
925 /* All SVR4 targets use the ELF object file format. */
926 #define OBJECT_FORMAT_ELF