1 /* Operating system specific defines to be used when targeting GCC for some
2 generic System V Release 4 system.
3 Copyright (C) 1991, 1994, 1995 Free Software Foundation, Inc.
4 Contributed by Ron Guilmette (rfg@segfault.us.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) \
68 /* This defines which multi-letter switches take arguments. On svr4,
69 there are no such switches except those implemented by GCC itself. */
71 #define WORD_SWITCH_TAKES_ARG(STR) \
72 (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) \
73 && strcmp (STR, "Tdata") && strcmp (STR, "Ttext") \
74 && strcmp (STR, "Tbss"))
76 /* You should redefine CPP_PREDEFINES in any file which includes this one.
77 The definition should be appropriate for the type of target system
78 involved, and it should include any -A (assertion) options which are
79 appropriate for the given target system. */
82 /* Provide an ASM_SPEC appropriate for svr4. Here we try to support as
83 many of the specialized svr4 assembler options as seems reasonable,
84 given that there are certain options which we can't (or shouldn't)
85 support directly due to the fact that they conflict with other options
86 for other svr4 tools (e.g. ld) or with other options for GCC itself.
87 For example, we don't support the -o (output file) or -R (remove
88 input file) options because GCC already handles these things. We
89 also don't support the -m (run m4) option for the assembler because
90 that conflicts with the -m (produce load map) option of the svr4
91 linker. We do however allow passing arbitrary options to the svr4
92 assembler via the -Wa, option.
94 Note that gcc doesn't allow a space to follow -Y in a -Ym,* or -Yd,*
100 "%{V} %{v:%{!V:-V}} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
102 /* svr4 assemblers need the `-' (indicating input from stdin) to come after
103 the -o option (and its argument) for some reason. If we try to put it
104 before the -o option, the assembler will try to read the file named as
105 the output file in the -o option as an input file (after it has already
106 written some stuff to it) and the binary stuff contained therein will
107 cause totally confuse the assembler, resulting in many spurious error
110 #undef ASM_FINAL_SPEC
111 #define ASM_FINAL_SPEC "%{pipe:-}"
113 /* Under svr4, the normal location of the `ld' and `as' programs is the
114 /usr/ccs/bin directory. */
116 #ifndef CROSS_COMPILE
117 #undef MD_EXEC_PREFIX
118 #define MD_EXEC_PREFIX "/usr/ccs/bin/"
121 /* Under svr4, the normal location of the various *crt*.o files is the
122 /usr/ccs/lib directory. */
124 #ifndef CROSS_COMPILE
125 #undef MD_STARTFILE_PREFIX
126 #define MD_STARTFILE_PREFIX "/usr/ccs/lib/"
129 /* Provide a LIB_SPEC appropriate for svr4. Here we tack on the default
130 standard C library (unless we are building a shared library). */
133 #define LIB_SPEC "%{!shared:%{!symbolic:-lc}}"
135 /* Provide an ENDFILE_SPEC appropriate for svr4. Here we tack on our own
136 magical crtend.o file (see crtstuff.c) which provides part of the
137 support for getting C++ file-scope static object constructed before
138 entering `main', followed by the normal svr3/svr4 "finalizer" file,
139 which is either `gcrtn.o' or `crtn.o'. */
142 #define ENDFILE_SPEC "crtend.o%s %{pg:gcrtn.o}%{!pg:crtn.o%s}"
144 /* Provide a LINK_SPEC appropriate for svr4. Here we provide support
145 for the special GCC options -static, -shared, and -symbolic which
146 allow us to link things in one of these three modes by applying the
147 appropriate combinations of options at link-time. We also provide
148 support here for as many of the other svr4 linker options as seems
149 reasonable, given that some of them conflict with options for other
150 svr4 tools (e.g. the assembler). In particular, we do support the
151 -h*, -z*, -V, -b, -t, -Qy, -Qn, and -YP* options here, and the -e*,
152 -l*, -o*, -r, -s, -u*, and -L* options are directly supported
153 by gcc.c itself. We don't directly support the -m (generate load
154 map) option because that conflicts with the -m (run m4) option of
155 the svr4 assembler. We also don't directly support the svr4 linker's
156 -I* or -M* options because these conflict with existing GCC options.
157 We do however allow passing arbitrary options to the svr4 linker
158 via the -Wl, option. We don't support the svr4 linker's -a option
159 at all because it is totally useless and because it conflicts with
162 Note that gcc doesn't allow a space to follow -Y in a -YP,* option.
164 When the -G link option is used (-shared and -symbolic) a final link is
169 #define LINK_SPEC "%{h*} %{V} %{v:%{!V:-V}} \
171 %{static:-dn -Bstatic} \
172 %{shared:-G -dy -z text %{!h*:%{o*:-h %*}}} \
173 %{symbolic:-Bsymbolic -G -dy -z text %{!h*:%{o*:-h %*}}} \
178 #define LINK_SPEC "%{h*} %{V} %{v:%{!V:-V}} \
180 %{static:-dn -Bstatic} \
181 %{shared:-G -dy -z text %{!h*:%{o*:-h %*}}} \
182 %{symbolic:-Bsymbolic -G -dy -z text %{!h*:%{o*:-h %*}}} \
185 %{!YP,*:%{p:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
186 %{!p:-Y P,/usr/ccs/lib:/usr/lib}} \
190 /* Gcc automatically adds in one of the files /usr/ccs/lib/values-Xc.o,
191 /usr/ccs/lib/values-Xa.o, or /usr/ccs/lib/values-Xt.o for each final
192 link step (depending upon the other gcc options selected, such as
193 -traditional and -ansi). These files each contain one (initialized)
194 copy of a special variable called `_lib_version'. Each one of these
195 files has `_lib_version' initialized to a different (enum) value.
196 The SVR4 library routines query the value of `_lib_version' at run
197 to decide how they should behave. Specifically, they decide (based
198 upon the value of `_lib_version') if they will act in a strictly ANSI
199 conforming manner or not.
202 #undef STARTFILE_SPEC
203 #define STARTFILE_SPEC "%{!shared: \
205 %{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}}}\
206 %{pg:gcrti.o%s}%{!pg:crti.o%s} \
207 %{ansi:values-Xc.o%s} \
209 %{traditional:values-Xt.o%s} \
210 %{!traditional:values-Xa.o%s}} \
213 /* Attach a special .ident directive to the end of the file to identify
214 the version of GCC which compiled this code. The format of the
215 .ident string is patterned after the ones produced by native svr4
218 #define IDENT_ASM_OP ".ident"
220 #define ASM_FILE_END(FILE) \
222 fprintf ((FILE), "\t%s\t\"GCC: (GNU) %s\"\n", \
223 IDENT_ASM_OP, version_string); \
226 /* Allow #sccs in preprocessor. */
228 #define SCCS_DIRECTIVE
230 /* Output #ident as a .ident. */
232 #define ASM_OUTPUT_IDENT(FILE, NAME) \
233 fprintf (FILE, "\t%s\t\"%s\"\n", IDENT_ASM_OP, NAME);
235 /* Use periods rather than dollar signs in special g++ assembler names. */
237 #define NO_DOLLAR_IN_LABEL
239 /* Writing `int' for a bitfield forces int alignment for the structure. */
241 #define PCC_BITFIELD_TYPE_MATTERS 1
243 /* Implicit library calls should use memcpy, not bcopy, etc. */
245 #define TARGET_MEM_FUNCTIONS
247 /* Handle #pragma weak and #pragma pack. */
249 #define HANDLE_SYSV_PRAGMA
251 /* System V Release 4 uses DWARF debugging info. */
253 #define DWARF_DEBUGGING_INFO
255 /* The numbers used to denote specific machine registers in the System V
256 Release 4 DWARF debugging information are quite likely to be totally
257 different from the numbers used in BSD stabs debugging information
258 for the same kind of target machine. Thus, we undefine the macro
259 DBX_REGISTER_NUMBER here as an extra inducement to get people to
260 provide proper machine-specific definitions of DBX_REGISTER_NUMBER
261 (which is also used to provide DWARF registers numbers in dwarfout.c)
262 in their tm.h files which include this file. */
264 #undef DBX_REGISTER_NUMBER
266 /* gas on SVR4 supports the use of .stabs. Permit -gstabs to be used
267 in general, although it will only work when using gas. */
269 #define DBX_DEBUGGING_INFO
271 /* When generating stabs debugging, use N_BINCL entries. */
273 #define DBX_USE_BINCL
275 /* Use DWARF debugging info by default. */
277 #ifndef PREFERRED_DEBUGGING_TYPE
278 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
281 /* Make LBRAC and RBRAC addresses relative to the start of the
282 function. The native Solaris stabs debugging format works this
283 way, gdb expects it, and it reduces the number of relocation
286 #define DBX_BLOCKS_FUNCTION_RELATIVE 1
288 /* When using stabs, gcc2_compiled must be a stabs entry, not an
289 ordinary symbol, or gdb won't see it. The stabs entry must be
290 before the N_SO in order for gdb to find it. */
292 #define ASM_IDENTIFY_GCC(FILE) \
295 if (write_symbols != DBX_DEBUG) \
296 fputs ("gcc2_compiled.:\n", FILE); \
298 fputs ("\t.stabs\t\"gcc2_compiled.\", 0x3c, 0, 0, 0\n", FILE); \
302 /* Like block addresses, stabs line numbers are relative to the
305 #define ASM_OUTPUT_SOURCE_LINE(file, line) \
308 static int sym_lineno = 1; \
309 fprintf (file, ".stabn 68,0,%d,.LM%d-", \
311 assemble_name (file, \
312 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));\
313 fprintf (file, "\n.LM%d:\n", sym_lineno); \
318 /* In order for relative line numbers to work, we must output the
319 stabs entry for the function name first. */
321 #define DBX_FUNCTION_FIRST
323 /* Generate a blank trailing N_SO to mark the end of the .o file, since
324 we can't depend upon the linker to mark .o file boundaries with
327 #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME) \
329 "\t.text\n\t.stabs \"\",%d,0,0,.Letext\n.Letext:\n", N_SO)
331 /* Define the actual types of some ANSI-mandated types. (These
332 definitions should work for most SVR4 systems). */
335 #define SIZE_TYPE "unsigned int"
338 #define PTRDIFF_TYPE "int"
341 #define WCHAR_TYPE "long int"
343 #undef WCHAR_TYPE_SIZE
344 #define WCHAR_TYPE_SIZE BITS_PER_WORD
346 /* This causes trouble, because it requires the host machine
347 to support ANSI C. */
348 /* #define MULTIBYTE_CHARS */
351 #define ASM_BYTE_OP ".byte"
354 #define SET_ASM_OP ".set"
356 /* This is how to begin an assembly language file. Most svr4 assemblers want
357 at least a .file directive to come first, and some want to see a .version
358 directive come right after that. Here we just establish a default
359 which generates only the .file directive. If you need a .version
360 directive for any specific target, you should override this definition
361 in the target-specific file which includes this one. */
363 #undef ASM_FILE_START
364 #define ASM_FILE_START(FILE) \
365 output_file_directive ((FILE), main_input_filename)
367 /* This is how to allocate empty space in some section. The .zero
368 pseudo-op is used for this on most svr4 assemblers. */
370 #define SKIP_ASM_OP ".zero"
372 #undef ASM_OUTPUT_SKIP
373 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
374 fprintf (FILE, "\t%s\t%u\n", SKIP_ASM_OP, (SIZE))
376 /* This is how to output a reference to a user-level label named NAME.
377 `assemble_name' uses this.
379 For System V Release 4 the convention is *not* to prepend a leading
380 underscore onto user-level symbol names. */
382 #undef ASM_OUTPUT_LABELREF
383 #define ASM_OUTPUT_LABELREF(FILE,NAME) fprintf (FILE, "%s", NAME)
385 /* This is how to output an internal numbered label where
386 PREFIX is the class of label and NUM is the number within the class.
388 For most svr4 systems, the convention is that any symbol which begins
389 with a period is not put into the linker symbol table by the assembler. */
391 #undef ASM_OUTPUT_INTERNAL_LABEL
392 #define ASM_OUTPUT_INTERNAL_LABEL(FILE, PREFIX, NUM) \
394 fprintf (FILE, ".%s%d:\n", PREFIX, NUM); \
397 /* This is how to store into the string LABEL
398 the symbol_ref name of an internal numbered label where
399 PREFIX is the class of label and NUM is the number within the class.
400 This is suitable for output with `assemble_name'.
402 For most svr4 systems, the convention is that any symbol which begins
403 with a period is not put into the linker symbol table by the assembler. */
405 #undef ASM_GENERATE_INTERNAL_LABEL
406 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
408 sprintf (LABEL, "*.%s%d", PREFIX, NUM); \
411 /* Output the label which precedes a jumptable. Note that for all svr4
412 systems where we actually generate jumptables (which is to say every
413 svr4 target except i386, where we use casesi instead) we put the jump-
414 tables into the .rodata section and since other stuff could have been
415 put into the .rodata section prior to any given jumptable, we have to
416 make sure that the location counter for the .rodata section gets pro-
417 perly re-aligned prior to the actual beginning of the jump table. */
419 #define ALIGN_ASM_OP ".align"
421 #ifndef ASM_OUTPUT_BEFORE_CASE_LABEL
422 #define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE,PREFIX,NUM,TABLE) \
423 ASM_OUTPUT_ALIGN ((FILE), 2);
426 #undef ASM_OUTPUT_CASE_LABEL
427 #define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,JUMPTABLE) \
429 ASM_OUTPUT_BEFORE_CASE_LABEL (FILE, PREFIX, NUM, JUMPTABLE) \
430 ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM); \
433 /* The standard SVR4 assembler seems to require that certain builtin
434 library routines (e.g. .udiv) be explicitly declared as .globl
435 in each assembly file where they are referenced. */
437 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
438 ASM_GLOBALIZE_LABEL (FILE, XSTR (FUN, 0))
440 /* This says how to output assembler code to declare an
441 uninitialized external linkage data object. Under SVR4,
442 the linker seems to want the alignment of data objects
443 to depend on their types. We do exactly that here. */
445 #define COMMON_ASM_OP ".comm"
447 #undef ASM_OUTPUT_ALIGNED_COMMON
448 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
450 fprintf ((FILE), "\t%s\t", COMMON_ASM_OP); \
451 assemble_name ((FILE), (NAME)); \
452 fprintf ((FILE), ",%u,%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT); \
455 /* This says how to output assembler code to declare an
456 uninitialized internal linkage data object. Under SVR4,
457 the linker seems to want the alignment of data objects
458 to depend on their types. We do exactly that here. */
460 #define LOCAL_ASM_OP ".local"
462 #undef ASM_OUTPUT_ALIGNED_LOCAL
463 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
465 fprintf ((FILE), "\t%s\t", LOCAL_ASM_OP); \
466 assemble_name ((FILE), (NAME)); \
467 fprintf ((FILE), "\n"); \
468 ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN); \
471 /* This is the pseudo-op used to generate a 32-bit word of data with a
472 specific value in some section. This is the same for all known svr4
475 #define INT_ASM_OP ".long"
477 /* This is the pseudo-op used to generate a contiguous sequence of byte
478 values from a double-quoted string WITHOUT HAVING A TERMINATING NUL
479 AUTOMATICALLY APPENDED. This is the same for most svr4 assemblers. */
481 #undef ASCII_DATA_ASM_OP
482 #define ASCII_DATA_ASM_OP ".ascii"
484 /* Support const sections and the ctors and dtors sections for g++.
485 Note that there appears to be two different ways to support const
486 sections at the moment. You can either #define the symbol
487 READONLY_DATA_SECTION (giving it some code which switches to the
488 readonly data section) or else you can #define the symbols
489 EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and
490 SELECT_RTX_SECTION. We do both here just to be on the safe side. */
492 #define USE_CONST_SECTION 1
494 #define CONST_SECTION_ASM_OP ".section\t.rodata"
496 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
498 Note that we want to give these sections the SHF_WRITE attribute
499 because these sections will actually contain data (i.e. tables of
500 addresses of functions in the current root executable or shared library
501 file) and, in the case of a shared library, the relocatable addresses
502 will have to be properly resolved/relocated (and then written into) by
503 the dynamic linker when it actually attaches the given shared library
504 to the executing process. (Note that on SVR4, you may wish to use the
505 `-z text' option to the ELF linker, when building a shared library, as
506 an additional check that you are doing everything right. But if you do
507 use the `-z text' option when building a shared library, you will get
508 errors unless the .ctors and .dtors sections are marked as writable
509 via the SHF_WRITE attribute.) */
511 #define CTORS_SECTION_ASM_OP ".section\t.ctors,\"aw\""
512 #define DTORS_SECTION_ASM_OP ".section\t.dtors,\"aw\""
514 /* On svr4, we *do* have support for the .init and .fini sections, and we
515 can put stuff in there to be executed before and after `main'. We let
516 crtstuff.c and other files know this by defining the following symbols.
517 The definitions say how to change sections to the .init and .fini
518 sections. This is the same for all known svr4 assemblers. */
520 #define INIT_SECTION_ASM_OP ".section\t.init"
521 #define FINI_SECTION_ASM_OP ".section\t.fini"
523 /* A default list of other sections which we might be "in" at any given
524 time. For targets that use additional sections (e.g. .tdesc) you
525 should override this definition in the target-specific file which
526 includes this file. */
528 #undef EXTRA_SECTIONS
529 #define EXTRA_SECTIONS in_const, in_ctors, in_dtors
531 /* A default list of extra section function definitions. For targets
532 that use additional sections (e.g. .tdesc) you should override this
533 definition in the target-specific file which includes this file. */
535 #undef EXTRA_SECTION_FUNCTIONS
536 #define EXTRA_SECTION_FUNCTIONS \
537 CONST_SECTION_FUNCTION \
538 CTORS_SECTION_FUNCTION \
539 DTORS_SECTION_FUNCTION
541 #define READONLY_DATA_SECTION() const_section ()
543 extern void text_section ();
545 #define CONST_SECTION_FUNCTION \
549 if (!USE_CONST_SECTION) \
551 else if (in_section != in_const) \
553 fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP); \
554 in_section = in_const; \
558 #define CTORS_SECTION_FUNCTION \
562 if (in_section != in_ctors) \
564 fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP); \
565 in_section = in_ctors; \
569 #define DTORS_SECTION_FUNCTION \
573 if (in_section != in_dtors) \
575 fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP); \
576 in_section = in_dtors; \
580 /* Switch into a generic section.
581 This is currently only used to support section attributes.
583 We make the section read-only and executable for a function decl,
584 read-only for a const data decl, and writable for a non-const data decl. */
585 #define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME) \
586 fprintf (FILE, ".section\t%s,\"%s\",@progbits\n", NAME, \
587 (DECL) && TREE_CODE (DECL) == FUNCTION_DECL ? "ax" : \
588 (DECL) && TREE_READONLY (DECL) ? "a" : "aw")
591 /* A C statement (sans semicolon) to output an element in the table of
592 global constructors. */
593 #define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \
596 fprintf (FILE, "\t%s\t ", INT_ASM_OP); \
597 assemble_name (FILE, NAME); \
598 fprintf (FILE, "\n"); \
601 /* A C statement (sans semicolon) to output an element in the table of
602 global destructors. */
603 #define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \
606 fprintf (FILE, "\t%s\t ", INT_ASM_OP); \
607 assemble_name (FILE, NAME); \
608 fprintf (FILE, "\n"); \
611 /* A C statement or statements to switch to the appropriate
612 section for output of DECL. DECL is either a `VAR_DECL' node
613 or a constant of some sort. RELOC indicates whether forming
614 the initial value of DECL requires link-time relocations. */
616 #define SELECT_SECTION(DECL,RELOC) \
618 if (TREE_CODE (DECL) == STRING_CST) \
620 if (! flag_writable_strings) \
625 else if (TREE_CODE (DECL) == VAR_DECL) \
627 if ((flag_pic && RELOC) \
628 || !TREE_READONLY (DECL) || TREE_SIDE_EFFECTS (DECL) \
629 || !DECL_INITIAL (DECL) \
630 || (DECL_INITIAL (DECL) != error_mark_node \
631 && !TREE_CONSTANT (DECL_INITIAL (DECL)))) \
640 /* A C statement or statements to switch to the appropriate
641 section for output of RTX in mode MODE. RTX is some kind
642 of constant in RTL. The argument MODE is redundant except
643 in the case of a `const_int' rtx. Currently, these always
644 go into the const section. */
646 #undef SELECT_RTX_SECTION
647 #define SELECT_RTX_SECTION(MODE,RTX) const_section()
649 /* Define the strings used for the special svr4 .type and .size directives.
650 These strings generally do not vary from one system running svr4 to
651 another, but if a given system (e.g. m88k running svr) needs to use
652 different pseudo-op names for these, they may be overridden in the
653 file which includes this one. */
655 #define TYPE_ASM_OP ".type"
656 #define SIZE_ASM_OP ".size"
658 /* This is how we tell the assembler that a symbol is weak. */
660 #define ASM_WEAKEN_LABEL(FILE,NAME) \
661 do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \
662 fputc ('\n', FILE); } while (0)
664 /* The following macro defines the format used to output the second
665 operand of the .type assembler directive. Different svr4 assemblers
666 expect various different forms for this operand. The one given here
667 is just a default. You may need to override it in your machine-
668 specific tm.h file (depending upon the particulars of your assembler). */
670 #define TYPE_OPERAND_FMT "@%s"
672 /* Write the extra assembler code needed to declare a function's result.
673 Most svr4 assemblers don't require any special declaration of the
674 result value, but there are exceptions. */
676 #ifndef ASM_DECLARE_RESULT
677 #define ASM_DECLARE_RESULT(FILE, RESULT)
680 /* These macros generate the special .type and .size directives which
681 are used to set the corresponding fields of the linker symbol table
682 entries in an ELF object file under SVR4. These macros also output
683 the starting labels for the relevant functions/objects. */
685 /* Write the extra assembler code needed to declare a function properly.
686 Some svr4 assemblers need to also have something extra said about the
687 function's return value. We allow for that here. */
689 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
691 fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
692 assemble_name (FILE, NAME); \
694 fprintf (FILE, TYPE_OPERAND_FMT, "function"); \
696 ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
697 ASM_OUTPUT_LABEL(FILE, NAME); \
700 /* Write the extra assembler code needed to declare an object properly. */
702 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
704 fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
705 assemble_name (FILE, NAME); \
707 fprintf (FILE, TYPE_OPERAND_FMT, "object"); \
709 size_directive_output = 0; \
710 if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \
712 size_directive_output = 1; \
713 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
714 assemble_name (FILE, NAME); \
715 fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \
717 ASM_OUTPUT_LABEL(FILE, NAME); \
720 /* Output the size directive for a decl in rest_of_decl_compilation
721 in the case where we did not do so before the initializer.
722 Once we find the error_mark_node, we know that the value of
723 size_directive_output was set
724 by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */
726 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \
728 char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \
729 if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \
730 && ! AT_END && TOP_LEVEL \
731 && DECL_INITIAL (DECL) == error_mark_node \
732 && !size_directive_output) \
734 size_directive_output = 1; \
735 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
736 assemble_name (FILE, name); \
737 fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \
741 /* This is how to declare the size of a function. */
743 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
745 if (!flag_inhibit_size_directive) \
748 static int labelno; \
750 ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno); \
751 ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno); \
752 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
753 assemble_name (FILE, (FNAME)); \
754 fprintf (FILE, ","); \
755 assemble_name (FILE, label); \
756 fprintf (FILE, "-"); \
757 assemble_name (FILE, (FNAME)); \
762 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
763 ASM_OUTPUT_LIMITED_STRING macros. Each byte in the table
764 corresponds to a particular byte value [0..255]. For any
765 given byte value, if the value in the corresponding table
766 position is zero, the given character can be output directly.
767 If the table value is 1, the byte must be output as a \ooo
768 octal escape. If the tables value is anything else, then the
769 byte value should be output as a \ followed by the value
770 in the table. Note that we can use standard UN*X escape
771 sequences for many control characters, but we don't use
772 \a to represent BEL because some svr4 assemblers (e.g. on
773 the i386) don't know about that. Also, we don't use \v
774 since some versions of gas, such as 2.2 did not accept it. */
777 "\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\
778 \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\
779 \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\
780 \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\
781 \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\
782 \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\
783 \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\
784 \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"
786 /* Some svr4 assemblers have a limit on the number of characters which
787 can appear in the operand of a .string directive. If your assembler
788 has such a limitation, you should define STRING_LIMIT to reflect that
789 limit. Note that at least some svr4 assemblers have a limit on the
790 actual number of bytes in the double-quoted string, and that they
791 count each character in an escape sequence as one byte. Thus, an
792 escape sequence like \377 would count as four bytes.
794 If your target assembler doesn't support the .string directive, you
795 should define this to zero.
798 #define STRING_LIMIT ((unsigned) 256)
800 #define STRING_ASM_OP ".string"
802 /* The routine used to output NUL terminated strings. We use a special
803 version of this for most svr4 targets because doing so makes the
804 generated assembly code more compact (and thus faster to assemble)
805 as well as more readable, especially for targets like the i386
806 (where the only alternative is to output character sequences as
807 comma separated lists of numbers). */
809 #define ASM_OUTPUT_LIMITED_STRING(FILE, STR) \
812 register unsigned char *_limited_str = (unsigned char *) (STR); \
813 register unsigned ch; \
814 fprintf ((FILE), "\t%s\t\"", STRING_ASM_OP); \
815 for (; ch = *_limited_str; _limited_str++) \
817 register int escape; \
818 switch (escape = ESCAPES[ch]) \
824 fprintf ((FILE), "\\%03o", ch); \
827 putc ('\\', (FILE)); \
828 putc (escape, (FILE)); \
832 fprintf ((FILE), "\"\n"); \
836 /* The routine used to output sequences of byte values. We use a special
837 version of this for most svr4 targets because doing so makes the
838 generated assembly code more compact (and thus faster to assemble)
839 as well as more readable. Note that if we find subparts of the
840 character sequence which end with NUL (and which are shorter than
841 STRING_LIMIT) we output those using ASM_OUTPUT_LIMITED_STRING. */
843 #undef ASM_OUTPUT_ASCII
844 #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \
847 register unsigned char *_ascii_bytes = (unsigned char *) (STR); \
848 register unsigned char *limit = _ascii_bytes + (LENGTH); \
849 register unsigned bytes_in_chunk = 0; \
850 for (; _ascii_bytes < limit; _ascii_bytes++) \
852 register unsigned char *p; \
853 if (bytes_in_chunk >= 60) \
855 fprintf ((FILE), "\"\n"); \
856 bytes_in_chunk = 0; \
858 for (p = _ascii_bytes; p < limit && *p != '\0'; p++) \
860 if (p < limit && (p - _ascii_bytes) <= STRING_LIMIT) \
862 if (bytes_in_chunk > 0) \
864 fprintf ((FILE), "\"\n"); \
865 bytes_in_chunk = 0; \
867 ASM_OUTPUT_LIMITED_STRING ((FILE), _ascii_bytes); \
872 register int escape; \
873 register unsigned ch; \
874 if (bytes_in_chunk == 0) \
875 fprintf ((FILE), "\t%s\t\"", ASCII_DATA_ASM_OP); \
876 switch (escape = ESCAPES[ch = *_ascii_bytes]) \
883 fprintf ((FILE), "\\%03o", ch); \
884 bytes_in_chunk += 4; \
887 putc ('\\', (FILE)); \
888 putc (escape, (FILE)); \
889 bytes_in_chunk += 2; \
894 if (bytes_in_chunk > 0) \
895 fprintf ((FILE), "\"\n"); \
899 /* All SVR4 targets use the ELF object file format. */
900 #define OBJECT_FORMAT_ELF
902 /* The maximum alignment which the object file format can support.
903 ELF doesn't have a limit, but we've got to override the default
904 (which is BIGGEST_ALIGNMENT). */
905 #define MAX_OFILE_ALIGNMENT 0x10000