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 /* Use DWARF debugging info by default. */
273 #ifndef PREFERRED_DEBUGGING_TYPE
274 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
277 /* Make LBRAC and RBRAC addresses relative to the start of the
278 function. The native Solaris stabs debugging format works this
279 way, gdb expects it, and it reduces the number of relocation
282 #define DBX_BLOCKS_FUNCTION_RELATIVE 1
284 /* When using stabs, gcc2_compiled must be a stabs entry, not an
285 ordinary symbol, or gdb won't see it. The stabs entry must be
286 before the N_SO in order for gdb to find it. */
288 #define ASM_IDENTIFY_GCC(FILE) \
291 if (write_symbols != DBX_DEBUG) \
292 fputs ("gcc2_compiled.:\n", FILE); \
294 fputs ("\t.stabs\t\"gcc2_compiled.\", 0x3c, 0, 0, 0\n", FILE); \
298 /* Like block addresses, stabs line numbers are relative to the
301 #define ASM_OUTPUT_SOURCE_LINE(file, line) \
304 static int sym_lineno = 1; \
305 fprintf (file, ".stabn 68,0,%d,.LM%d-", \
307 assemble_name (file, \
308 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));\
309 fprintf (file, "\n.LM%d:\n", sym_lineno); \
314 /* In order for relative line numbers to work, we must output the
315 stabs entry for the function name first. */
317 #define DBX_FUNCTION_FIRST
319 /* Generate a blank trailing N_SO to mark the end of the .o file, since
320 we can't depend upon the linker to mark .o file boundaries with
323 #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME) \
325 "\t.text\n\t.stabs \"\",%d,0,0,.Letext\n.Letext:\n", N_SO)
327 /* Define the actual types of some ANSI-mandated types. (These
328 definitions should work for most SVR4 systems). */
331 #define SIZE_TYPE "unsigned int"
334 #define PTRDIFF_TYPE "int"
337 #define WCHAR_TYPE "long int"
339 #undef WCHAR_TYPE_SIZE
340 #define WCHAR_TYPE_SIZE BITS_PER_WORD
342 /* This causes trouble, because it requires the host machine
343 to support ANSI C. */
344 /* #define MULTIBYTE_CHARS */
347 #define ASM_BYTE_OP ".byte"
350 #define SET_ASM_OP ".set"
352 /* This is how to begin an assembly language file. Most svr4 assemblers want
353 at least a .file directive to come first, and some want to see a .version
354 directive come right after that. Here we just establish a default
355 which generates only the .file directive. If you need a .version
356 directive for any specific target, you should override this definition
357 in the target-specific file which includes this one. */
359 #undef ASM_FILE_START
360 #define ASM_FILE_START(FILE) \
361 output_file_directive ((FILE), main_input_filename)
363 /* This is how to allocate empty space in some section. The .zero
364 pseudo-op is used for this on most svr4 assemblers. */
366 #define SKIP_ASM_OP ".zero"
368 #undef ASM_OUTPUT_SKIP
369 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
370 fprintf (FILE, "\t%s\t%u\n", SKIP_ASM_OP, (SIZE))
372 /* This is how to output a reference to a user-level label named NAME.
373 `assemble_name' uses this.
375 For System V Release 4 the convention is *not* to prepend a leading
376 underscore onto user-level symbol names. */
378 #undef ASM_OUTPUT_LABELREF
379 #define ASM_OUTPUT_LABELREF(FILE,NAME) fprintf (FILE, "%s", NAME)
381 /* This is how to output an internal numbered label where
382 PREFIX is the class of label and NUM is the number within the class.
384 For most svr4 systems, the convention is that any symbol which begins
385 with a period is not put into the linker symbol table by the assembler. */
387 #undef ASM_OUTPUT_INTERNAL_LABEL
388 #define ASM_OUTPUT_INTERNAL_LABEL(FILE, PREFIX, NUM) \
390 fprintf (FILE, ".%s%d:\n", PREFIX, NUM); \
393 /* This is how to store into the string LABEL
394 the symbol_ref name of an internal numbered label where
395 PREFIX is the class of label and NUM is the number within the class.
396 This is suitable for output with `assemble_name'.
398 For most svr4 systems, the convention is that any symbol which begins
399 with a period is not put into the linker symbol table by the assembler. */
401 #undef ASM_GENERATE_INTERNAL_LABEL
402 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
404 sprintf (LABEL, "*.%s%d", PREFIX, NUM); \
407 /* Output the label which precedes a jumptable. Note that for all svr4
408 systems where we actually generate jumptables (which is to say every
409 svr4 target except i386, where we use casesi instead) we put the jump-
410 tables into the .rodata section and since other stuff could have been
411 put into the .rodata section prior to any given jumptable, we have to
412 make sure that the location counter for the .rodata section gets pro-
413 perly re-aligned prior to the actual beginning of the jump table. */
415 #define ALIGN_ASM_OP ".align"
417 #ifndef ASM_OUTPUT_BEFORE_CASE_LABEL
418 #define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE,PREFIX,NUM,TABLE) \
419 ASM_OUTPUT_ALIGN ((FILE), 2);
422 #undef ASM_OUTPUT_CASE_LABEL
423 #define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,JUMPTABLE) \
425 ASM_OUTPUT_BEFORE_CASE_LABEL (FILE, PREFIX, NUM, JUMPTABLE) \
426 ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM); \
429 /* The standard SVR4 assembler seems to require that certain builtin
430 library routines (e.g. .udiv) be explicitly declared as .globl
431 in each assembly file where they are referenced. */
433 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
434 ASM_GLOBALIZE_LABEL (FILE, XSTR (FUN, 0))
436 /* This says how to output assembler code to declare an
437 uninitialized external linkage data object. Under SVR4,
438 the linker seems to want the alignment of data objects
439 to depend on their types. We do exactly that here. */
441 #define COMMON_ASM_OP ".comm"
443 #undef ASM_OUTPUT_ALIGNED_COMMON
444 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
446 fprintf ((FILE), "\t%s\t", COMMON_ASM_OP); \
447 assemble_name ((FILE), (NAME)); \
448 fprintf ((FILE), ",%u,%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT); \
451 /* This says how to output assembler code to declare an
452 uninitialized internal linkage data object. Under SVR4,
453 the linker seems to want the alignment of data objects
454 to depend on their types. We do exactly that here. */
456 #define LOCAL_ASM_OP ".local"
458 #undef ASM_OUTPUT_ALIGNED_LOCAL
459 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
461 fprintf ((FILE), "\t%s\t", LOCAL_ASM_OP); \
462 assemble_name ((FILE), (NAME)); \
463 fprintf ((FILE), "\n"); \
464 ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN); \
467 /* This is the pseudo-op used to generate a 32-bit word of data with a
468 specific value in some section. This is the same for all known svr4
471 #define INT_ASM_OP ".long"
473 /* This is the pseudo-op used to generate a contiguous sequence of byte
474 values from a double-quoted string WITHOUT HAVING A TERMINATING NUL
475 AUTOMATICALLY APPENDED. This is the same for most svr4 assemblers. */
477 #undef ASCII_DATA_ASM_OP
478 #define ASCII_DATA_ASM_OP ".ascii"
480 /* Support const sections and the ctors and dtors sections for g++.
481 Note that there appears to be two different ways to support const
482 sections at the moment. You can either #define the symbol
483 READONLY_DATA_SECTION (giving it some code which switches to the
484 readonly data section) or else you can #define the symbols
485 EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and
486 SELECT_RTX_SECTION. We do both here just to be on the safe side. */
488 #define USE_CONST_SECTION 1
490 #define CONST_SECTION_ASM_OP ".section\t.rodata"
492 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
494 Note that we want to give these sections the SHF_WRITE attribute
495 because these sections will actually contain data (i.e. tables of
496 addresses of functions in the current root executable or shared library
497 file) and, in the case of a shared library, the relocatable addresses
498 will have to be properly resolved/relocated (and then written into) by
499 the dynamic linker when it actually attaches the given shared library
500 to the executing process. (Note that on SVR4, you may wish to use the
501 `-z text' option to the ELF linker, when building a shared library, as
502 an additional check that you are doing everything right. But if you do
503 use the `-z text' option when building a shared library, you will get
504 errors unless the .ctors and .dtors sections are marked as writable
505 via the SHF_WRITE attribute.) */
507 #define CTORS_SECTION_ASM_OP ".section\t.ctors,\"aw\""
508 #define DTORS_SECTION_ASM_OP ".section\t.dtors,\"aw\""
510 /* On svr4, we *do* have support for the .init and .fini sections, and we
511 can put stuff in there to be executed before and after `main'. We let
512 crtstuff.c and other files know this by defining the following symbols.
513 The definitions say how to change sections to the .init and .fini
514 sections. This is the same for all known svr4 assemblers. */
516 #define INIT_SECTION_ASM_OP ".section\t.init"
517 #define FINI_SECTION_ASM_OP ".section\t.fini"
519 /* A default list of other sections which we might be "in" at any given
520 time. For targets that use additional sections (e.g. .tdesc) you
521 should override this definition in the target-specific file which
522 includes this file. */
524 #undef EXTRA_SECTIONS
525 #define EXTRA_SECTIONS in_const, in_ctors, in_dtors
527 /* A default list of extra section function definitions. For targets
528 that use additional sections (e.g. .tdesc) you should override this
529 definition in the target-specific file which includes this file. */
531 #undef EXTRA_SECTION_FUNCTIONS
532 #define EXTRA_SECTION_FUNCTIONS \
533 CONST_SECTION_FUNCTION \
534 CTORS_SECTION_FUNCTION \
535 DTORS_SECTION_FUNCTION
537 #define READONLY_DATA_SECTION() const_section ()
539 extern void text_section ();
541 #define CONST_SECTION_FUNCTION \
545 if (!USE_CONST_SECTION) \
547 else if (in_section != in_const) \
549 fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP); \
550 in_section = in_const; \
554 #define CTORS_SECTION_FUNCTION \
558 if (in_section != in_ctors) \
560 fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP); \
561 in_section = in_ctors; \
565 #define DTORS_SECTION_FUNCTION \
569 if (in_section != in_dtors) \
571 fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP); \
572 in_section = in_dtors; \
576 /* Switch into a generic section.
577 This is currently only used to support section attributes.
579 We make the section read-only and executable for a function decl,
580 read-only for a const data decl, and writable for a non-const data decl. */
581 #define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME) \
582 fprintf (FILE, ".section\t%s,\"%s\",@progbits\n", NAME, \
583 (DECL) && TREE_CODE (DECL) == FUNCTION_DECL ? "ax" : \
584 (DECL) && TREE_READONLY (DECL) ? "a" : "aw")
587 /* A C statement (sans semicolon) to output an element in the table of
588 global constructors. */
589 #define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \
592 fprintf (FILE, "\t%s\t ", INT_ASM_OP); \
593 assemble_name (FILE, NAME); \
594 fprintf (FILE, "\n"); \
597 /* A C statement (sans semicolon) to output an element in the table of
598 global destructors. */
599 #define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \
602 fprintf (FILE, "\t%s\t ", INT_ASM_OP); \
603 assemble_name (FILE, NAME); \
604 fprintf (FILE, "\n"); \
607 /* A C statement or statements to switch to the appropriate
608 section for output of DECL. DECL is either a `VAR_DECL' node
609 or a constant of some sort. RELOC indicates whether forming
610 the initial value of DECL requires link-time relocations. */
612 #define SELECT_SECTION(DECL,RELOC) \
614 if (TREE_CODE (DECL) == STRING_CST) \
616 if (! flag_writable_strings) \
621 else if (TREE_CODE (DECL) == VAR_DECL) \
623 if ((flag_pic && RELOC) \
624 || !TREE_READONLY (DECL) || TREE_SIDE_EFFECTS (DECL) \
625 || !DECL_INITIAL (DECL) \
626 || (DECL_INITIAL (DECL) != error_mark_node \
627 && !TREE_CONSTANT (DECL_INITIAL (DECL)))) \
636 /* A C statement or statements to switch to the appropriate
637 section for output of RTX in mode MODE. RTX is some kind
638 of constant in RTL. The argument MODE is redundant except
639 in the case of a `const_int' rtx. Currently, these always
640 go into the const section. */
642 #undef SELECT_RTX_SECTION
643 #define SELECT_RTX_SECTION(MODE,RTX) const_section()
645 /* Define the strings used for the special svr4 .type and .size directives.
646 These strings generally do not vary from one system running svr4 to
647 another, but if a given system (e.g. m88k running svr) needs to use
648 different pseudo-op names for these, they may be overridden in the
649 file which includes this one. */
651 #define TYPE_ASM_OP ".type"
652 #define SIZE_ASM_OP ".size"
654 /* This is how we tell the assembler that a symbol is weak. */
656 #define ASM_WEAKEN_LABEL(FILE,NAME) \
657 do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \
658 fputc ('\n', FILE); } while (0)
660 /* The following macro defines the format used to output the second
661 operand of the .type assembler directive. Different svr4 assemblers
662 expect various different forms for this operand. The one given here
663 is just a default. You may need to override it in your machine-
664 specific tm.h file (depending upon the particulars of your assembler). */
666 #define TYPE_OPERAND_FMT "@%s"
668 /* Write the extra assembler code needed to declare a function's result.
669 Most svr4 assemblers don't require any special declaration of the
670 result value, but there are exceptions. */
672 #ifndef ASM_DECLARE_RESULT
673 #define ASM_DECLARE_RESULT(FILE, RESULT)
676 /* These macros generate the special .type and .size directives which
677 are used to set the corresponding fields of the linker symbol table
678 entries in an ELF object file under SVR4. These macros also output
679 the starting labels for the relevant functions/objects. */
681 /* Write the extra assembler code needed to declare a function properly.
682 Some svr4 assemblers need to also have something extra said about the
683 function's return value. We allow for that here. */
685 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
687 fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
688 assemble_name (FILE, NAME); \
690 fprintf (FILE, TYPE_OPERAND_FMT, "function"); \
692 ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
693 ASM_OUTPUT_LABEL(FILE, NAME); \
696 /* Write the extra assembler code needed to declare an object properly. */
698 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
700 fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
701 assemble_name (FILE, NAME); \
703 fprintf (FILE, TYPE_OPERAND_FMT, "object"); \
705 size_directive_output = 0; \
706 if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \
708 size_directive_output = 1; \
709 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
710 assemble_name (FILE, NAME); \
711 fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \
713 ASM_OUTPUT_LABEL(FILE, NAME); \
716 /* Output the size directive for a decl in rest_of_decl_compilation
717 in the case where we did not do so before the initializer.
718 Once we find the error_mark_node, we know that the value of
719 size_directive_output was set
720 by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */
722 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \
724 char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \
725 if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \
726 && ! AT_END && TOP_LEVEL \
727 && DECL_INITIAL (DECL) == error_mark_node \
728 && !size_directive_output) \
730 size_directive_output = 1; \
731 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
732 assemble_name (FILE, name); \
733 fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \
737 /* This is how to declare the size of a function. */
739 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
741 if (!flag_inhibit_size_directive) \
744 static int labelno; \
746 ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno); \
747 ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno); \
748 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
749 assemble_name (FILE, (FNAME)); \
750 fprintf (FILE, ","); \
751 assemble_name (FILE, label); \
752 fprintf (FILE, "-"); \
753 assemble_name (FILE, (FNAME)); \
758 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
759 ASM_OUTPUT_LIMITED_STRING macros. Each byte in the table
760 corresponds to a particular byte value [0..255]. For any
761 given byte value, if the value in the corresponding table
762 position is zero, the given character can be output directly.
763 If the table value is 1, the byte must be output as a \ooo
764 octal escape. If the tables value is anything else, then the
765 byte value should be output as a \ followed by the value
766 in the table. Note that we can use standard UN*X escape
767 sequences for many control characters, but we don't use
768 \a to represent BEL because some svr4 assemblers (e.g. on
769 the i386) don't know about that. Also, we don't use \v
770 since some versions of gas, such as 2.2 did not accept it. */
773 "\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\
774 \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\
775 \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\
776 \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\
777 \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\
778 \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\
779 \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\
780 \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 /* Some svr4 assemblers have a limit on the number of characters which
783 can appear in the operand of a .string directive. If your assembler
784 has such a limitation, you should define STRING_LIMIT to reflect that
785 limit. Note that at least some svr4 assemblers have a limit on the
786 actual number of bytes in the double-quoted string, and that they
787 count each character in an escape sequence as one byte. Thus, an
788 escape sequence like \377 would count as four bytes.
790 If your target assembler doesn't support the .string directive, you
791 should define this to zero.
794 #define STRING_LIMIT ((unsigned) 256)
796 #define STRING_ASM_OP ".string"
798 /* The routine used to output NUL terminated strings. We use a special
799 version of this for most svr4 targets because doing so makes the
800 generated assembly code more compact (and thus faster to assemble)
801 as well as more readable, especially for targets like the i386
802 (where the only alternative is to output character sequences as
803 comma separated lists of numbers). */
805 #define ASM_OUTPUT_LIMITED_STRING(FILE, STR) \
808 register unsigned char *_limited_str = (unsigned char *) (STR); \
809 register unsigned ch; \
810 fprintf ((FILE), "\t%s\t\"", STRING_ASM_OP); \
811 for (; ch = *_limited_str; _limited_str++) \
813 register int escape; \
814 switch (escape = ESCAPES[ch]) \
820 fprintf ((FILE), "\\%03o", ch); \
823 putc ('\\', (FILE)); \
824 putc (escape, (FILE)); \
828 fprintf ((FILE), "\"\n"); \
832 /* The routine used to output sequences of byte values. We use a special
833 version of this for most svr4 targets because doing so makes the
834 generated assembly code more compact (and thus faster to assemble)
835 as well as more readable. Note that if we find subparts of the
836 character sequence which end with NUL (and which are shorter than
837 STRING_LIMIT) we output those using ASM_OUTPUT_LIMITED_STRING. */
839 #undef ASM_OUTPUT_ASCII
840 #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \
843 register unsigned char *_ascii_bytes = (unsigned char *) (STR); \
844 register unsigned char *limit = _ascii_bytes + (LENGTH); \
845 register unsigned bytes_in_chunk = 0; \
846 for (; _ascii_bytes < limit; _ascii_bytes++) \
848 register unsigned char *p; \
849 if (bytes_in_chunk >= 60) \
851 fprintf ((FILE), "\"\n"); \
852 bytes_in_chunk = 0; \
854 for (p = _ascii_bytes; p < limit && *p != '\0'; p++) \
856 if (p < limit && (p - _ascii_bytes) <= STRING_LIMIT) \
858 if (bytes_in_chunk > 0) \
860 fprintf ((FILE), "\"\n"); \
861 bytes_in_chunk = 0; \
863 ASM_OUTPUT_LIMITED_STRING ((FILE), _ascii_bytes); \
868 register int escape; \
869 register unsigned ch; \
870 if (bytes_in_chunk == 0) \
871 fprintf ((FILE), "\t%s\t\"", ASCII_DATA_ASM_OP); \
872 switch (escape = ESCAPES[ch = *_ascii_bytes]) \
879 fprintf ((FILE), "\\%03o", ch); \
880 bytes_in_chunk += 4; \
883 putc ('\\', (FILE)); \
884 putc (escape, (FILE)); \
885 bytes_in_chunk += 2; \
890 if (bytes_in_chunk > 0) \
891 fprintf ((FILE), "\"\n"); \
895 /* All SVR4 targets use the ELF object file format. */
896 #define OBJECT_FORMAT_ELF
898 /* The maximum alignment which the object file format can support.
899 ELF doesn't have a limit, but we've got to override the default
900 (which is BIGGEST_ALIGNMENT). */
901 #define MAX_OFILE_ALIGNMENT 0x10000