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 #undef MD_EXEC_PREFIX
117 #define MD_EXEC_PREFIX "/usr/ccs/bin/"
119 /* Under svr4, the normal location of the various *crt*.o files is the
120 /usr/ccs/lib directory. */
122 #undef MD_STARTFILE_PREFIX
123 #define MD_STARTFILE_PREFIX "/usr/ccs/lib/"
125 /* Provide a LIB_SPEC appropriate for svr4. Here we tack on the default
126 standard C library (unless we are building a shared library). */
129 #define LIB_SPEC "%{!shared:%{!symbolic:-lc}}"
131 /* Provide a LIBGCC_SPEC appropriate for svr4. We also want to exclude
132 libgcc when -symbolic. */
135 #define LIBGCC_SPEC "%{!shared:%{!symbolic:-lgcc}}"
137 /* Provide an ENDFILE_SPEC appropriate for svr4. Here we tack on our own
138 magical crtend.o file (see crtstuff.c) which provides part of the
139 support for getting C++ file-scope static object constructed before
140 entering `main', followed by the normal svr3/svr4 "finalizer" file,
141 which is either `gcrtn.o' or `crtn.o'. */
144 #define ENDFILE_SPEC "crtend.o%s %{pg:gcrtn.o}%{!pg:crtn.o%s}"
146 /* Provide a LINK_SPEC appropriate for svr4. Here we provide support
147 for the special GCC options -static, -shared, and -symbolic which
148 allow us to link things in one of these three modes by applying the
149 appropriate combinations of options at link-time. We also provide
150 support here for as many of the other svr4 linker options as seems
151 reasonable, given that some of them conflict with options for other
152 svr4 tools (e.g. the assembler). In particular, we do support the
153 -h*, -z*, -V, -b, -t, -Qy, -Qn, and -YP* options here, and the -e*,
154 -l*, -o*, -r, -s, -u*, and -L* options are directly supported
155 by gcc.c itself. We don't directly support the -m (generate load
156 map) option because that conflicts with the -m (run m4) option of
157 the svr4 assembler. We also don't directly support the svr4 linker's
158 -I* or -M* options because these conflict with existing GCC options.
159 We do however allow passing arbitrary options to the svr4 linker
160 via the -Wl, option. We don't support the svr4 linker's -a option
161 at all because it is totally useless and because it conflicts with
164 Note that gcc doesn't allow a space to follow -Y in a -YP,* option.
166 When the -G link option is used (-shared and -symbolic) a final link is
170 #define LINK_SPEC "%{h*} %{V} %{v:%{!V:-V}} \
172 %{static:-dn -Bstatic} \
173 %{shared:-G -dy -z text %{!h*:%{o*:-h %*}}} \
174 %{symbolic:-Bsymbolic -G -dy -z text %{!h*:%{o*:-h %*}}} \
177 %{!YP,*:%{p:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
178 %{!p:-Y P,/usr/ccs/lib:/usr/lib}} \
181 /* Gcc automatically adds in one of the files /usr/ccs/lib/values-Xc.o,
182 /usr/ccs/lib/values-Xa.o, or /usr/ccs/lib/values-Xt.o for each final
183 link step (depending upon the other gcc options selected, such as
184 -traditional and -ansi). These files each contain one (initialized)
185 copy of a special variable called `_lib_version'. Each one of these
186 files has `_lib_version' initialized to a different (enum) value.
187 The SVR4 library routines query the value of `_lib_version' at run
188 to decide how they should behave. Specifically, they decide (based
189 upon the value of `_lib_version') if they will act in a strictly ANSI
190 conforming manner or not.
193 #undef STARTFILE_SPEC
194 #define STARTFILE_SPEC "%{!shared: \
196 %{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}}}\
197 %{pg:gcrti.o%s}%{!pg:crti.o%s} \
198 %{ansi:values-Xc.o%s} \
200 %{traditional:values-Xt.o%s} \
201 %{!traditional:values-Xa.o%s}} \
204 /* Attach a special .ident directive to the end of the file to identify
205 the version of GCC which compiled this code. The format of the
206 .ident string is patterned after the ones produced by native svr4
209 #define IDENT_ASM_OP ".ident"
211 #define ASM_FILE_END(FILE) \
213 fprintf ((FILE), "\t%s\t\"GCC: (GNU) %s\"\n", \
214 IDENT_ASM_OP, version_string); \
217 /* Allow #sccs in preprocessor. */
219 #define SCCS_DIRECTIVE
221 /* Output #ident as a .ident. */
223 #define ASM_OUTPUT_IDENT(FILE, NAME) \
224 fprintf (FILE, "\t%s\t\"%s\"\n", IDENT_ASM_OP, NAME);
226 /* Use periods rather than dollar signs in special g++ assembler names. */
228 #define NO_DOLLAR_IN_LABEL
230 /* Writing `int' for a bitfield forces int alignment for the structure. */
232 #define PCC_BITFIELD_TYPE_MATTERS 1
234 /* Implicit library calls should use memcpy, not bcopy, etc. */
236 #define TARGET_MEM_FUNCTIONS
238 /* Handle #pragma weak and #pragma pack. */
240 #define HANDLE_SYSV_PRAGMA
242 /* System V Release 4 uses DWARF debugging info. */
244 #define DWARF_DEBUGGING_INFO
246 /* The numbers used to denote specific machine registers in the System V
247 Release 4 DWARF debugging information are quite likely to be totally
248 different from the numbers used in BSD stabs debugging information
249 for the same kind of target machine. Thus, we undefine the macro
250 DBX_REGISTER_NUMBER here as an extra inducement to get people to
251 provide proper machine-specific definitions of DBX_REGISTER_NUMBER
252 (which is also used to provide DWARF registers numbers in dwarfout.c)
253 in their tm.h files which include this file. */
255 #undef DBX_REGISTER_NUMBER
257 /* gas on SVR4 supports the use of .stabs. Permit -gstabs to be used
258 in general, although it will only work when using gas. */
260 #define DBX_DEBUGGING_INFO
262 /* Use DWARF debugging info by default. */
264 #ifndef PREFERRED_DEBUGGING_TYPE
265 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
268 /* Make LBRAC and RBRAC addresses relative to the start of the
269 function. The native Solaris stabs debugging format works this
270 way, gdb expects it, and it reduces the number of relocation
273 #define DBX_BLOCKS_FUNCTION_RELATIVE 1
275 /* When using stabs, gcc2_compiled must be a stabs entry, not an
276 ordinary symbol, or gdb won't see it. Furthermore, since gdb reads
277 the input piecemeal, starting with each N_SO, it's a lot easier if
278 the gcc2 flag symbol is *after* the N_SO rather than before it. So
279 we emit an N_OPT stab there. */
281 #define ASM_IDENTIFY_GCC(FILE) \
284 if (write_symbols != DBX_DEBUG) \
285 fputs ("gcc2_compiled.:\n", FILE); \
289 #define ASM_IDENTIFY_GCC_AFTER_SOURCE(FILE) \
292 if (write_symbols == DBX_DEBUG) \
293 fputs ("\t.stabs\t\"gcc2_compiled.\", 0x3c, 0, 0, 0\n", FILE); \
297 /* Like block addresses, stabs line numbers are relative to the
300 #define ASM_OUTPUT_SOURCE_LINE(file, line) \
303 static int sym_lineno = 1; \
304 fprintf (file, ".stabn 68,0,%d,.LM%d-", \
306 assemble_name (file, \
307 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));\
308 fprintf (file, "\n.LM%d:\n", sym_lineno); \
313 /* In order for relative line numbers to work, we must output the
314 stabs entry for the function name first. */
316 #define DBX_FUNCTION_FIRST
318 /* Generate a blank trailing N_SO to mark the end of the .o file, since
319 we can't depend upon the linker to mark .o file boundaries with
322 #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME) \
324 "\t.text\n\t.stabs \"\",%d,0,0,.Letext\n.Letext:\n", N_SO)
326 /* Define the actual types of some ANSI-mandated types. (These
327 definitions should work for most SVR4 systems). */
330 #define SIZE_TYPE "unsigned int"
333 #define PTRDIFF_TYPE "int"
336 #define WCHAR_TYPE "long int"
338 #undef WCHAR_TYPE_SIZE
339 #define WCHAR_TYPE_SIZE BITS_PER_WORD
341 /* This causes trouble, because it requires the host machine
342 to support ANSI C. */
343 /* #define MULTIBYTE_CHARS */
346 #define ASM_BYTE_OP ".byte"
349 #define SET_ASM_OP ".set"
351 /* This is how to begin an assembly language file. Most svr4 assemblers want
352 at least a .file directive to come first, and some want to see a .version
353 directive come right after that. Here we just establish a default
354 which generates only the .file directive. If you need a .version
355 directive for any specific target, you should override this definition
356 in the target-specific file which includes this one. */
358 #undef ASM_FILE_START
359 #define ASM_FILE_START(FILE) \
360 output_file_directive ((FILE), main_input_filename)
362 /* This is how to allocate empty space in some section. The .zero
363 pseudo-op is used for this on most svr4 assemblers. */
365 #define SKIP_ASM_OP ".zero"
367 #undef ASM_OUTPUT_SKIP
368 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
369 fprintf (FILE, "\t%s\t%u\n", SKIP_ASM_OP, (SIZE))
371 /* This is how to output a reference to a user-level label named NAME.
372 `assemble_name' uses this.
374 For System V Release 4 the convention is *not* to prepend a leading
375 underscore onto user-level symbol names. */
377 #undef ASM_OUTPUT_LABELREF
378 #define ASM_OUTPUT_LABELREF(FILE,NAME) fprintf (FILE, "%s", NAME)
380 /* This is how to output an internal numbered label where
381 PREFIX is the class of label and NUM is the number within the class.
383 For most svr4 systems, the convention is that any symbol which begins
384 with a period is not put into the linker symbol table by the assembler. */
386 #undef ASM_OUTPUT_INTERNAL_LABEL
387 #define ASM_OUTPUT_INTERNAL_LABEL(FILE, PREFIX, NUM) \
389 fprintf (FILE, ".%s%d:\n", PREFIX, NUM); \
392 /* This is how to store into the string LABEL
393 the symbol_ref name of an internal numbered label where
394 PREFIX is the class of label and NUM is the number within the class.
395 This is suitable for output with `assemble_name'.
397 For most svr4 systems, the convention is that any symbol which begins
398 with a period is not put into the linker symbol table by the assembler. */
400 #undef ASM_GENERATE_INTERNAL_LABEL
401 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
403 sprintf (LABEL, "*.%s%d", PREFIX, NUM); \
406 /* Output the label which precedes a jumptable. Note that for all svr4
407 systems where we actually generate jumptables (which is to say every
408 svr4 target except i386, where we use casesi instead) we put the jump-
409 tables into the .rodata section and since other stuff could have been
410 put into the .rodata section prior to any given jumptable, we have to
411 make sure that the location counter for the .rodata section gets pro-
412 perly re-aligned prior to the actual beginning of the jump table. */
414 #define ALIGN_ASM_OP ".align"
416 #ifndef ASM_OUTPUT_BEFORE_CASE_LABEL
417 #define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE,PREFIX,NUM,TABLE) \
418 ASM_OUTPUT_ALIGN ((FILE), 2);
421 #undef ASM_OUTPUT_CASE_LABEL
422 #define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,JUMPTABLE) \
424 ASM_OUTPUT_BEFORE_CASE_LABEL (FILE, PREFIX, NUM, JUMPTABLE) \
425 ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM); \
428 /* The standard SVR4 assembler seems to require that certain builtin
429 library routines (e.g. .udiv) be explicitly declared as .globl
430 in each assembly file where they are referenced. */
432 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
433 ASM_GLOBALIZE_LABEL (FILE, XSTR (FUN, 0))
435 /* This says how to output assembler code to declare an
436 uninitialized external linkage data object. Under SVR4,
437 the linker seems to want the alignment of data objects
438 to depend on their types. We do exactly that here. */
440 #define COMMON_ASM_OP ".comm"
442 #undef ASM_OUTPUT_ALIGNED_COMMON
443 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
445 fprintf ((FILE), "\t%s\t", COMMON_ASM_OP); \
446 assemble_name ((FILE), (NAME)); \
447 fprintf ((FILE), ",%u,%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT); \
450 /* This says how to output assembler code to declare an
451 uninitialized internal linkage data object. Under SVR4,
452 the linker seems to want the alignment of data objects
453 to depend on their types. We do exactly that here. */
455 #define LOCAL_ASM_OP ".local"
457 #undef ASM_OUTPUT_ALIGNED_LOCAL
458 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
460 fprintf ((FILE), "\t%s\t", LOCAL_ASM_OP); \
461 assemble_name ((FILE), (NAME)); \
462 fprintf ((FILE), "\n"); \
463 ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN); \
466 /* This is the pseudo-op used to generate a 32-bit word of data with a
467 specific value in some section. This is the same for all known svr4
470 #define INT_ASM_OP ".long"
472 /* This is the pseudo-op used to generate a contiguous sequence of byte
473 values from a double-quoted string WITHOUT HAVING A TERMINATING NUL
474 AUTOMATICALLY APPENDED. This is the same for most svr4 assemblers. */
476 #undef ASCII_DATA_ASM_OP
477 #define ASCII_DATA_ASM_OP ".ascii"
479 /* Support const sections and the ctors and dtors sections for g++.
480 Note that there appears to be two different ways to support const
481 sections at the moment. You can either #define the symbol
482 READONLY_DATA_SECTION (giving it some code which switches to the
483 readonly data section) or else you can #define the symbols
484 EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and
485 SELECT_RTX_SECTION. We do both here just to be on the safe side. */
487 #define USE_CONST_SECTION 1
489 #define CONST_SECTION_ASM_OP ".section\t.rodata"
491 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
493 Note that we want to give these sections the SHF_WRITE attribute
494 because these sections will actually contain data (i.e. tables of
495 addresses of functions in the current root executable or shared library
496 file) and, in the case of a shared library, the relocatable addresses
497 will have to be properly resolved/relocated (and then written into) by
498 the dynamic linker when it actually attaches the given shared library
499 to the executing process. (Note that on SVR4, you may wish to use the
500 `-z text' option to the ELF linker, when building a shared library, as
501 an additional check that you are doing everything right. But if you do
502 use the `-z text' option when building a shared library, you will get
503 errors unless the .ctors and .dtors sections are marked as writable
504 via the SHF_WRITE attribute.) */
506 #define CTORS_SECTION_ASM_OP ".section\t.ctors,\"aw\""
507 #define DTORS_SECTION_ASM_OP ".section\t.dtors,\"aw\""
509 /* On svr4, we *do* have support for the .init and .fini sections, and we
510 can put stuff in there to be executed before and after `main'. We let
511 crtstuff.c and other files know this by defining the following symbols.
512 The definitions say how to change sections to the .init and .fini
513 sections. This is the same for all known svr4 assemblers. */
515 #define INIT_SECTION_ASM_OP ".section\t.init"
516 #define FINI_SECTION_ASM_OP ".section\t.fini"
518 /* A default list of other sections which we might be "in" at any given
519 time. For targets that use additional sections (e.g. .tdesc) you
520 should override this definition in the target-specific file which
521 includes this file. */
523 #undef EXTRA_SECTIONS
524 #define EXTRA_SECTIONS in_const, in_ctors, in_dtors
526 /* A default list of extra section function definitions. For targets
527 that use additional sections (e.g. .tdesc) you should override this
528 definition in the target-specific file which includes this file. */
530 #undef EXTRA_SECTION_FUNCTIONS
531 #define EXTRA_SECTION_FUNCTIONS \
532 CONST_SECTION_FUNCTION \
533 CTORS_SECTION_FUNCTION \
534 DTORS_SECTION_FUNCTION
536 #define READONLY_DATA_SECTION() const_section ()
538 extern void text_section ();
540 #define CONST_SECTION_FUNCTION \
544 if (!USE_CONST_SECTION) \
546 else if (in_section != in_const) \
548 fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP); \
549 in_section = in_const; \
553 #define CTORS_SECTION_FUNCTION \
557 if (in_section != in_ctors) \
559 fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP); \
560 in_section = in_ctors; \
564 #define DTORS_SECTION_FUNCTION \
568 if (in_section != in_dtors) \
570 fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP); \
571 in_section = in_dtors; \
575 /* Switch into a generic section.
576 This is currently only used to support section attributes.
578 We make the section read-only and executable for a function decl,
579 read-only for a const data decl, and writable for a non-const data decl. */
580 #define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME) \
581 fprintf (FILE, ".section\t%s,\"%s\",@progbits\n", NAME, \
582 (DECL) && TREE_CODE (DECL) == FUNCTION_DECL ? "ax" : \
583 (DECL) && TREE_READONLY (DECL) ? "a" : "aw")
586 /* A C statement (sans semicolon) to output an element in the table of
587 global constructors. */
588 #define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \
591 fprintf (FILE, "\t%s\t ", INT_ASM_OP); \
592 assemble_name (FILE, NAME); \
593 fprintf (FILE, "\n"); \
596 /* A C statement (sans semicolon) to output an element in the table of
597 global destructors. */
598 #define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \
601 fprintf (FILE, "\t%s\t ", INT_ASM_OP); \
602 assemble_name (FILE, NAME); \
603 fprintf (FILE, "\n"); \
606 /* A C statement or statements to switch to the appropriate
607 section for output of DECL. DECL is either a `VAR_DECL' node
608 or a constant of some sort. RELOC indicates whether forming
609 the initial value of DECL requires link-time relocations. */
611 #define SELECT_SECTION(DECL,RELOC) \
613 if (TREE_CODE (DECL) == STRING_CST) \
615 if (! flag_writable_strings) \
620 else if (TREE_CODE (DECL) == VAR_DECL) \
622 if ((flag_pic && RELOC) \
623 || !TREE_READONLY (DECL) || TREE_SIDE_EFFECTS (DECL) \
624 || !DECL_INITIAL (DECL) \
625 || (DECL_INITIAL (DECL) != error_mark_node \
626 && !TREE_CONSTANT (DECL_INITIAL (DECL)))) \
635 /* A C statement or statements to switch to the appropriate
636 section for output of RTX in mode MODE. RTX is some kind
637 of constant in RTL. The argument MODE is redundant except
638 in the case of a `const_int' rtx. Currently, these always
639 go into the const section. */
641 #undef SELECT_RTX_SECTION
642 #define SELECT_RTX_SECTION(MODE,RTX) const_section()
644 /* Define the strings used for the special svr4 .type and .size directives.
645 These strings generally do not vary from one system running svr4 to
646 another, but if a given system (e.g. m88k running svr) needs to use
647 different pseudo-op names for these, they may be overridden in the
648 file which includes this one. */
650 #define TYPE_ASM_OP ".type"
651 #define SIZE_ASM_OP ".size"
653 /* This is how we tell the assembler that a symbol is weak. */
655 #define ASM_WEAKEN_LABEL(FILE,NAME) \
656 do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \
657 fputc ('\n', FILE); } while (0)
659 /* The following macro defines the format used to output the second
660 operand of the .type assembler directive. Different svr4 assemblers
661 expect various different forms for this operand. The one given here
662 is just a default. You may need to override it in your machine-
663 specific tm.h file (depending upon the particulars of your assembler). */
665 #define TYPE_OPERAND_FMT "@%s"
667 /* Write the extra assembler code needed to declare a function's result.
668 Most svr4 assemblers don't require any special declaration of the
669 result value, but there are exceptions. */
671 #ifndef ASM_DECLARE_RESULT
672 #define ASM_DECLARE_RESULT(FILE, RESULT)
675 /* These macros generate the special .type and .size directives which
676 are used to set the corresponding fields of the linker symbol table
677 entries in an ELF object file under SVR4. These macros also output
678 the starting labels for the relevant functions/objects. */
680 /* Write the extra assembler code needed to declare a function properly.
681 Some svr4 assemblers need to also have something extra said about the
682 function's return value. We allow for that here. */
684 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
686 fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
687 assemble_name (FILE, NAME); \
689 fprintf (FILE, TYPE_OPERAND_FMT, "function"); \
691 ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
692 ASM_OUTPUT_LABEL(FILE, NAME); \
695 /* Write the extra assembler code needed to declare an object properly. */
697 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
699 fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
700 assemble_name (FILE, NAME); \
702 fprintf (FILE, TYPE_OPERAND_FMT, "object"); \
704 size_directive_output = 0; \
705 if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \
707 size_directive_output = 1; \
708 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
709 assemble_name (FILE, NAME); \
710 fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \
712 ASM_OUTPUT_LABEL(FILE, NAME); \
715 /* Output the size directive for a decl in rest_of_decl_compilation
716 in the case where we did not do so before the initializer.
717 Once we find the error_mark_node, we know that the value of
718 size_directive_output was set
719 by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */
721 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \
723 char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \
724 if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \
725 && ! AT_END && TOP_LEVEL \
726 && DECL_INITIAL (DECL) == error_mark_node \
727 && !size_directive_output) \
729 size_directive_output = 1; \
730 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
731 assemble_name (FILE, name); \
732 fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \
736 /* This is how to declare the size of a function. */
738 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
740 if (!flag_inhibit_size_directive) \
743 static int labelno; \
745 ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno); \
746 ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno); \
747 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
748 assemble_name (FILE, (FNAME)); \
749 fprintf (FILE, ","); \
750 assemble_name (FILE, label); \
751 fprintf (FILE, "-"); \
752 assemble_name (FILE, (FNAME)); \
757 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
758 ASM_OUTPUT_LIMITED_STRING macros. Each byte in the table
759 corresponds to a particular byte value [0..255]. For any
760 given byte value, if the value in the corresponding table
761 position is zero, the given character can be output directly.
762 If the table value is 1, the byte must be output as a \ooo
763 octal escape. If the tables value is anything else, then the
764 byte value should be output as a \ followed by the value
765 in the table. Note that we can use standard UN*X escape
766 sequences for many control characters, but we don't use
767 \a to represent BEL because some svr4 assemblers (e.g. on
768 the i386) don't know about that. Also, we don't use \v
769 since some versions of gas, such as 2.2 did not accept it. */
772 "\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\
773 \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\
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\1\
776 \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\
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"
781 /* Some svr4 assemblers have a limit on the number of characters which
782 can appear in the operand of a .string directive. If your assembler
783 has such a limitation, you should define STRING_LIMIT to reflect that
784 limit. Note that at least some svr4 assemblers have a limit on the
785 actual number of bytes in the double-quoted string, and that they
786 count each character in an escape sequence as one byte. Thus, an
787 escape sequence like \377 would count as four bytes.
789 If your target assembler doesn't support the .string directive, you
790 should define this to zero.
793 #define STRING_LIMIT ((unsigned) 256)
795 #define STRING_ASM_OP ".string"
797 /* The routine used to output NUL terminated strings. We use a special
798 version of this for most svr4 targets because doing so makes the
799 generated assembly code more compact (and thus faster to assemble)
800 as well as more readable, especially for targets like the i386
801 (where the only alternative is to output character sequences as
802 comma separated lists of numbers). */
804 #define ASM_OUTPUT_LIMITED_STRING(FILE, STR) \
807 register unsigned char *_limited_str = (unsigned char *) (STR); \
808 register unsigned ch; \
809 fprintf ((FILE), "\t%s\t\"", STRING_ASM_OP); \
810 for (; ch = *_limited_str; _limited_str++) \
812 register int escape; \
813 switch (escape = ESCAPES[ch]) \
819 fprintf ((FILE), "\\%03o", ch); \
822 putc ('\\', (FILE)); \
823 putc (escape, (FILE)); \
827 fprintf ((FILE), "\"\n"); \
831 /* The routine used to output sequences of byte values. We use a special
832 version of this for most svr4 targets because doing so makes the
833 generated assembly code more compact (and thus faster to assemble)
834 as well as more readable. Note that if we find subparts of the
835 character sequence which end with NUL (and which are shorter than
836 STRING_LIMIT) we output those using ASM_OUTPUT_LIMITED_STRING. */
838 #undef ASM_OUTPUT_ASCII
839 #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \
842 register unsigned char *_ascii_bytes = (unsigned char *) (STR); \
843 register unsigned char *limit = _ascii_bytes + (LENGTH); \
844 register unsigned bytes_in_chunk = 0; \
845 for (; _ascii_bytes < limit; _ascii_bytes++) \
847 register unsigned char *p; \
848 if (bytes_in_chunk >= 60) \
850 fprintf ((FILE), "\"\n"); \
851 bytes_in_chunk = 0; \
853 for (p = _ascii_bytes; p < limit && *p != '\0'; p++) \
855 if (p < limit && (p - _ascii_bytes) <= STRING_LIMIT) \
857 if (bytes_in_chunk > 0) \
859 fprintf ((FILE), "\"\n"); \
860 bytes_in_chunk = 0; \
862 ASM_OUTPUT_LIMITED_STRING ((FILE), _ascii_bytes); \
867 register int escape; \
868 register unsigned ch; \
869 if (bytes_in_chunk == 0) \
870 fprintf ((FILE), "\t%s\t\"", ASCII_DATA_ASM_OP); \
871 switch (escape = ESCAPES[ch = *_ascii_bytes]) \
878 fprintf ((FILE), "\\%03o", ch); \
879 bytes_in_chunk += 4; \
882 putc ('\\', (FILE)); \
883 putc (escape, (FILE)); \
884 bytes_in_chunk += 2; \
889 if (bytes_in_chunk > 0) \
890 fprintf ((FILE), "\"\n"); \
894 /* All SVR4 targets use the ELF object file format. */
895 #define OBJECT_FORMAT_ELF