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, 675 Mass Ave, Cambridge, MA 02139, USA.
22 To use this file, make up a file with a name like:
26 where ????? is replaced by the name of the basic hardware that you
27 are targeting for. Then, in the file ?????svr4.h, put something
33 followed by any really system-specific defines (or overrides of
34 defines) which you find that you need. For example, CPP_PREDEFINES
35 is defined here with only the defined -Dunix and -DSVR4. You should
36 probably override that in your target-specific ?????svr4.h file
37 with a set of defines that includes these, but also contains an
38 appropriate define for the type of hardware that you are targeting.
41 /* Define a symbol indicating that we are using svr4.h. */
44 /* For the sake of libgcc2.c, indicate target supports atexit. */
47 /* Cpp, assembler, linker, library, and startfile spec's. */
49 /* This defines which switch letters take arguments. On svr4, most of
50 the normal cases (defined in gcc.c) apply, and we also have -h* and
51 -z* options (for the linker). Note however that there is no such
52 thing as a -T option for svr4. */
54 #define SWITCH_TAKES_ARG(CHAR) \
67 /* This defines which multi-letter switches take arguments. On svr4,
68 there are no such switches except those implemented by GCC itself. */
70 #define WORD_SWITCH_TAKES_ARG(STR) \
71 (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) \
72 && strcmp (STR, "Tdata") && strcmp (STR, "Ttext") \
73 && strcmp (STR, "Tbss"))
75 /* You should redefine CPP_PREDEFINES in any file which includes this one.
76 The definition should be appropriate for the type of target system
77 involved, and it should include any -A (assertion) options which are
78 appropriate for the given target system. */
81 /* Provide an ASM_SPEC appropriate for svr4. Here we try to support as
82 many of the specialized svr4 assembler options as seems reasonable,
83 given that there are certain options which we can't (or shouldn't)
84 support directly due to the fact that they conflict with other options
85 for other svr4 tools (e.g. ld) or with other options for GCC itself.
86 For example, we don't support the -o (output file) or -R (remove
87 input file) options because GCC already handles these things. We
88 also don't support the -m (run m4) option for the assembler because
89 that conflicts with the -m (produce load map) option of the svr4
90 linker. We do however allow passing arbitrary options to the svr4
91 assembler via the -Wa, option.
93 Note that gcc doesn't allow a space to follow -Y in a -Ym,* or -Yd,*
99 "%{V} %{v:%{!V:-V}} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
101 /* svr4 assemblers need the `-' (indicating input from stdin) to come after
102 the -o option (and its argument) for some reason. If we try to put it
103 before the -o option, the assembler will try to read the file named as
104 the output file in the -o option as an input file (after it has already
105 written some stuff to it) and the binary stuff contained therein will
106 cause totally confuse the assembler, resulting in many spurious error
109 #undef ASM_FINAL_SPEC
110 #define ASM_FINAL_SPEC "%{pipe:-}"
112 /* Under svr4, the normal location of the `ld' and `as' programs is the
113 /usr/ccs/bin directory. */
115 #undef MD_EXEC_PREFIX
116 #define MD_EXEC_PREFIX "/usr/ccs/bin/"
118 /* Under svr4, the normal location of the various *crt*.o files is the
119 /usr/ccs/lib directory. */
121 #undef MD_STARTFILE_PREFIX
122 #define MD_STARTFILE_PREFIX "/usr/ccs/lib/"
124 /* Provide a LIB_SPEC appropriate for svr4. Here we tack on the default
125 standard C library (unless we are building a shared library). */
128 #define LIB_SPEC "%{!shared:%{!symbolic:-lc}}"
130 /* Provide a LIBGCC_SPEC appropriate for svr4. We also want to exclude
131 libgcc when -symbolic. */
134 #define LIBGCC_SPEC "%{!shared:%{!symbolic:-lgcc}}"
136 /* Provide an ENDFILE_SPEC appropriate for svr4. Here we tack on our own
137 magical crtend.o file (see crtstuff.c) which provides part of the
138 support for getting C++ file-scope static object constructed before
139 entering `main', followed by the normal svr3/svr4 "finalizer" file,
140 which is either `gcrtn.o' or `crtn.o'. */
143 #define ENDFILE_SPEC "crtend.o%s %{pg:gcrtn.o}%{!pg:crtn.o%s}"
145 /* Provide a LINK_SPEC appropriate for svr4. Here we provide support
146 for the special GCC options -static, -shared, and -symbolic which
147 allow us to link things in one of these three modes by applying the
148 appropriate combinations of options at link-time. We also provide
149 support here for as many of the other svr4 linker options as seems
150 reasonable, given that some of them conflict with options for other
151 svr4 tools (e.g. the assembler). In particular, we do support the
152 -h*, -z*, -V, -b, -t, -Qy, -Qn, and -YP* options here, and the -e*,
153 -l*, -o*, -r, -s, -u*, and -L* options are directly supported
154 by gcc.c itself. We don't directly support the -m (generate load
155 map) option because that conflicts with the -m (run m4) option of
156 the svr4 assembler. We also don't directly support the svr4 linker's
157 -I* or -M* options because these conflict with existing GCC options.
158 We do however allow passing arbitrary options to the svr4 linker
159 via the -Wl, option. We don't support the svr4 linker's -a option
160 at all because it is totally useless and because it conflicts with
163 Note that gcc doesn't allow a space to follow -Y in a -YP,* option.
165 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 %*}}} \
176 %{!YP,*:%{p:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
177 %{!p:-Y P,/usr/ccs/lib:/usr/lib}} \
180 /* Gcc automatically adds in one of the files /usr/ccs/lib/values-Xc.o,
181 /usr/ccs/lib/values-Xa.o, or /usr/ccs/lib/values-Xt.o for each final
182 link step (depending upon the other gcc options selected, such as
183 -traditional and -ansi). These files each contain one (initialized)
184 copy of a special variable called `_lib_version'. Each one of these
185 files has `_lib_version' initialized to a different (enum) value.
186 The SVR4 library routines query the value of `_lib_version' at run
187 to decide how they should behave. Specifically, they decide (based
188 upon the value of `_lib_version') if they will act in a strictly ANSI
189 conforming manner or not.
192 #undef STARTFILE_SPEC
193 #define STARTFILE_SPEC "%{!shared: \
195 %{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}}}\
196 %{pg:gcrti.o%s}%{!pg:crti.o%s} \
197 %{ansi:values-Xc.o%s} \
199 %{traditional:values-Xt.o%s} \
200 %{!traditional:values-Xa.o%s}} \
203 /* Attach a special .ident directive to the end of the file to identify
204 the version of GCC which compiled this code. The format of the
205 .ident string is patterned after the ones produced by native svr4
208 #define IDENT_ASM_OP ".ident"
210 #define ASM_FILE_END(FILE) \
212 fprintf ((FILE), "\t%s\t\"GCC: (GNU) %s\"\n", \
213 IDENT_ASM_OP, version_string); \
216 /* Allow #sccs in preprocessor. */
218 #define SCCS_DIRECTIVE
220 /* Output #ident as a .ident. */
222 #define ASM_OUTPUT_IDENT(FILE, NAME) \
223 fprintf (FILE, "\t%s\t\"%s\"\n", IDENT_ASM_OP, NAME);
225 /* Use periods rather than dollar signs in special g++ assembler names. */
227 #define NO_DOLLAR_IN_LABEL
229 /* Writing `int' for a bitfield forces int alignment for the structure. */
231 #define PCC_BITFIELD_TYPE_MATTERS 1
233 /* Implicit library calls should use memcpy, not bcopy, etc. */
235 #define TARGET_MEM_FUNCTIONS
237 /* Handle #pragma weak and #pragma pack. */
239 #define HANDLE_SYSV_PRAGMA
241 /* System V Release 4 uses DWARF debugging info. */
243 #define DWARF_DEBUGGING_INFO
245 /* The numbers used to denote specific machine registers in the System V
246 Release 4 DWARF debugging information are quite likely to be totally
247 different from the numbers used in BSD stabs debugging information
248 for the same kind of target machine. Thus, we undefine the macro
249 DBX_REGISTER_NUMBER here as an extra inducement to get people to
250 provide proper machine-specific definitions of DBX_REGISTER_NUMBER
251 (which is also used to provide DWARF registers numbers in dwarfout.c)
252 in their tm.h files which include this file. */
254 #undef DBX_REGISTER_NUMBER
256 /* gas on SVR4 supports the use of .stabs. Permit -gstabs to be used
257 in general, although it will only work when using gas. */
259 #define DBX_DEBUGGING_INFO
261 /* Use DWARF debugging info by default. */
263 #ifndef PREFERRED_DEBUGGING_TYPE
264 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
267 /* Make LBRAC and RBRAC addresses relative to the start of the
268 function. The native Solaris stabs debugging format works this
269 way, gdb expects it, and it reduces the number of relocation
272 #define DBX_BLOCKS_FUNCTION_RELATIVE 1
274 /* When using stabs, gcc2_compiled must be a stabs entry, not an
275 ordinary symbol, or gdb won't see it. Furthermore, since gdb reads
276 the input piecemeal, starting with each N_SO, it's a lot easier if
277 the gcc2 flag symbol is *after* the N_SO rather than before it. So
278 we emit an N_OPT stab there. */
280 #define ASM_IDENTIFY_GCC(FILE) \
283 if (write_symbols != DBX_DEBUG) \
284 fputs ("gcc2_compiled.:\n", FILE); \
288 #define ASM_IDENTIFY_GCC_AFTER_SOURCE(FILE) \
291 if (write_symbols == DBX_DEBUG) \
292 fputs ("\t.stabs\t\"gcc2_compiled.\", 0x3c, 0, 0, 0\n", FILE); \
296 /* Like block addresses, stabs line numbers are relative to the
299 #define ASM_OUTPUT_SOURCE_LINE(file, line) \
302 static int sym_lineno = 1; \
303 fprintf (file, ".stabn 68,0,%d,.LM%d-", \
305 assemble_name (file, \
306 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));\
307 fprintf (file, "\n.LM%d:\n", sym_lineno); \
312 /* In order for relative line numbers to work, we must output the
313 stabs entry for the function name first. */
315 #define DBX_FUNCTION_FIRST
317 /* Generate a blank trailing N_SO to mark the end of the .o file, since
318 we can't depend upon the linker to mark .o file boundaries with
321 #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME) \
323 "\t.text\n\t.stabs \"\",%d,0,0,.Letext\n.Letext:\n", N_SO)
325 /* Define the actual types of some ANSI-mandated types. (These
326 definitions should work for most SVR4 systems). */
329 #define SIZE_TYPE "unsigned int"
332 #define PTRDIFF_TYPE "int"
335 #define WCHAR_TYPE "long int"
337 #undef WCHAR_TYPE_SIZE
338 #define WCHAR_TYPE_SIZE BITS_PER_WORD
340 /* This causes trouble, because it requires the host machine
341 to support ANSI C. */
342 /* #define MULTIBYTE_CHARS */
345 #define ASM_BYTE_OP ".byte"
348 #define SET_ASM_OP ".set"
350 /* This is how to begin an assembly language file. Most svr4 assemblers want
351 at least a .file directive to come first, and some want to see a .version
352 directive come right after that. Here we just establish a default
353 which generates only the .file directive. If you need a .version
354 directive for any specific target, you should override this definition
355 in the target-specific file which includes this one. */
357 #undef ASM_FILE_START
358 #define ASM_FILE_START(FILE) \
359 output_file_directive ((FILE), main_input_filename)
361 /* This is how to allocate empty space in some section. The .zero
362 pseudo-op is used for this on most svr4 assemblers. */
364 #define SKIP_ASM_OP ".zero"
366 #undef ASM_OUTPUT_SKIP
367 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
368 fprintf (FILE, "\t%s\t%u\n", SKIP_ASM_OP, (SIZE))
370 /* This is how to output a reference to a user-level label named NAME.
371 `assemble_name' uses this.
373 For System V Release 4 the convention is *not* to prepend a leading
374 underscore onto user-level symbol names. */
376 #undef ASM_OUTPUT_LABELREF
377 #define ASM_OUTPUT_LABELREF(FILE,NAME) fprintf (FILE, "%s", NAME)
379 /* This is how to output an internal numbered label where
380 PREFIX is the class of label and NUM is the number within the class.
382 For most svr4 systems, the convention is that any symbol which begins
383 with a period is not put into the linker symbol table by the assembler. */
385 #undef ASM_OUTPUT_INTERNAL_LABEL
386 #define ASM_OUTPUT_INTERNAL_LABEL(FILE, PREFIX, NUM) \
388 fprintf (FILE, ".%s%d:\n", PREFIX, NUM); \
391 /* This is how to store into the string LABEL
392 the symbol_ref name of an internal numbered label where
393 PREFIX is the class of label and NUM is the number within the class.
394 This is suitable for output with `assemble_name'.
396 For most svr4 systems, the convention is that any symbol which begins
397 with a period is not put into the linker symbol table by the assembler. */
399 #undef ASM_GENERATE_INTERNAL_LABEL
400 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
402 sprintf (LABEL, "*.%s%d", PREFIX, NUM); \
405 /* Output the label which precedes a jumptable. Note that for all svr4
406 systems where we actually generate jumptables (which is to say every
407 svr4 target except i386, where we use casesi instead) we put the jump-
408 tables into the .rodata section and since other stuff could have been
409 put into the .rodata section prior to any given jumptable, we have to
410 make sure that the location counter for the .rodata section gets pro-
411 perly re-aligned prior to the actual beginning of the jump table. */
413 #define ALIGN_ASM_OP ".align"
415 #ifndef ASM_OUTPUT_BEFORE_CASE_LABEL
416 #define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE,PREFIX,NUM,TABLE) \
417 ASM_OUTPUT_ALIGN ((FILE), 2);
420 #undef ASM_OUTPUT_CASE_LABEL
421 #define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,JUMPTABLE) \
423 ASM_OUTPUT_BEFORE_CASE_LABEL (FILE, PREFIX, NUM, JUMPTABLE) \
424 ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM); \
427 /* The standard SVR4 assembler seems to require that certain builtin
428 library routines (e.g. .udiv) be explicitly declared as .globl
429 in each assembly file where they are referenced. */
431 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
432 ASM_GLOBALIZE_LABEL (FILE, XSTR (FUN, 0))
434 /* This says how to output assembler code to declare an
435 uninitialized external linkage data object. Under SVR4,
436 the linker seems to want the alignment of data objects
437 to depend on their types. We do exactly that here. */
439 #define COMMON_ASM_OP ".comm"
441 #undef ASM_OUTPUT_ALIGNED_COMMON
442 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
444 fprintf ((FILE), "\t%s\t", COMMON_ASM_OP); \
445 assemble_name ((FILE), (NAME)); \
446 fprintf ((FILE), ",%u,%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT); \
449 /* This says how to output assembler code to declare an
450 uninitialized internal linkage data object. Under SVR4,
451 the linker seems to want the alignment of data objects
452 to depend on their types. We do exactly that here. */
454 #define LOCAL_ASM_OP ".local"
456 #undef ASM_OUTPUT_ALIGNED_LOCAL
457 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
459 fprintf ((FILE), "\t%s\t", LOCAL_ASM_OP); \
460 assemble_name ((FILE), (NAME)); \
461 fprintf ((FILE), "\n"); \
462 ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN); \
465 /* This is the pseudo-op used to generate a 32-bit word of data with a
466 specific value in some section. This is the same for all known svr4
469 #define INT_ASM_OP ".long"
471 /* This is the pseudo-op used to generate a contiguous sequence of byte
472 values from a double-quoted string WITHOUT HAVING A TERMINATING NUL
473 AUTOMATICALLY APPENDED. This is the same for most svr4 assemblers. */
475 #undef ASCII_DATA_ASM_OP
476 #define ASCII_DATA_ASM_OP ".ascii"
478 /* Support const sections and the ctors and dtors sections for g++.
479 Note that there appears to be two different ways to support const
480 sections at the moment. You can either #define the symbol
481 READONLY_DATA_SECTION (giving it some code which switches to the
482 readonly data section) or else you can #define the symbols
483 EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and
484 SELECT_RTX_SECTION. We do both here just to be on the safe side. */
486 #define USE_CONST_SECTION 1
488 #define CONST_SECTION_ASM_OP ".section\t.rodata"
490 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
492 Note that we want to give these sections the SHF_WRITE attribute
493 because these sections will actually contain data (i.e. tables of
494 addresses of functions in the current root executable or shared library
495 file) and, in the case of a shared library, the relocatable addresses
496 will have to be properly resolved/relocated (and then written into) by
497 the dynamic linker when it actually attaches the given shared library
498 to the executing process. (Note that on SVR4, you may wish to use the
499 `-z text' option to the ELF linker, when building a shared library, as
500 an additional check that you are doing everything right. But if you do
501 use the `-z text' option when building a shared library, you will get
502 errors unless the .ctors and .dtors sections are marked as writable
503 via the SHF_WRITE attribute.) */
505 #define CTORS_SECTION_ASM_OP ".section\t.ctors,\"aw\""
506 #define DTORS_SECTION_ASM_OP ".section\t.dtors,\"aw\""
508 /* On svr4, we *do* have support for the .init and .fini sections, and we
509 can put stuff in there to be executed before and after `main'. We let
510 crtstuff.c and other files know this by defining the following symbols.
511 The definitions say how to change sections to the .init and .fini
512 sections. This is the same for all known svr4 assemblers. */
514 #define INIT_SECTION_ASM_OP ".section\t.init"
515 #define FINI_SECTION_ASM_OP ".section\t.fini"
517 /* A default list of other sections which we might be "in" at any given
518 time. For targets that use additional sections (e.g. .tdesc) you
519 should override this definition in the target-specific file which
520 includes this file. */
522 #undef EXTRA_SECTIONS
523 #define EXTRA_SECTIONS in_const, in_ctors, in_dtors
525 /* A default list of extra section function definitions. For targets
526 that use additional sections (e.g. .tdesc) you should override this
527 definition in the target-specific file which includes this file. */
529 #undef EXTRA_SECTION_FUNCTIONS
530 #define EXTRA_SECTION_FUNCTIONS \
531 CONST_SECTION_FUNCTION \
532 CTORS_SECTION_FUNCTION \
533 DTORS_SECTION_FUNCTION
535 #define READONLY_DATA_SECTION() const_section ()
537 extern void text_section ();
539 #define CONST_SECTION_FUNCTION \
543 if (!USE_CONST_SECTION) \
545 else if (in_section != in_const) \
547 fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP); \
548 in_section = in_const; \
552 #define CTORS_SECTION_FUNCTION \
556 if (in_section != in_ctors) \
558 fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP); \
559 in_section = in_ctors; \
563 #define DTORS_SECTION_FUNCTION \
567 if (in_section != in_dtors) \
569 fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP); \
570 in_section = in_dtors; \
574 /* Switch into a generic section.
575 This is currently only used to support section attributes. */
577 #define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME) \
578 fprintf (FILE, ".section\t%s,\"a\",@progbits\n", NAME)
580 /* A C statement (sans semicolon) to output an element in the table of
581 global constructors. */
582 #define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \
585 fprintf (FILE, "\t%s\t ", INT_ASM_OP); \
586 assemble_name (FILE, NAME); \
587 fprintf (FILE, "\n"); \
590 /* A C statement (sans semicolon) to output an element in the table of
591 global destructors. */
592 #define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \
595 fprintf (FILE, "\t%s\t ", INT_ASM_OP); \
596 assemble_name (FILE, NAME); \
597 fprintf (FILE, "\n"); \
600 /* A C statement or statements to switch to the appropriate
601 section for output of DECL. DECL is either a `VAR_DECL' node
602 or a constant of some sort. RELOC indicates whether forming
603 the initial value of DECL requires link-time relocations. */
605 #define SELECT_SECTION(DECL,RELOC) \
607 if (TREE_CODE (DECL) == STRING_CST) \
609 if (! flag_writable_strings) \
614 else if (TREE_CODE (DECL) == VAR_DECL) \
616 if ((flag_pic && RELOC) \
617 || !TREE_READONLY (DECL) || TREE_SIDE_EFFECTS (DECL) \
618 || !DECL_INITIAL (DECL) \
619 || (DECL_INITIAL (DECL) != error_mark_node \
620 && !TREE_CONSTANT (DECL_INITIAL (DECL)))) \
629 /* A C statement or statements to switch to the appropriate
630 section for output of RTX in mode MODE. RTX is some kind
631 of constant in RTL. The argument MODE is redundant except
632 in the case of a `const_int' rtx. Currently, these always
633 go into the const section. */
635 #undef SELECT_RTX_SECTION
636 #define SELECT_RTX_SECTION(MODE,RTX) const_section()
638 /* Define the strings used for the special svr4 .type and .size directives.
639 These strings generally do not vary from one system running svr4 to
640 another, but if a given system (e.g. m88k running svr) needs to use
641 different pseudo-op names for these, they may be overridden in the
642 file which includes this one. */
644 #define TYPE_ASM_OP ".type"
645 #define SIZE_ASM_OP ".size"
646 #define WEAK_ASM_OP ".weak"
648 /* The following macro defines the format used to output the second
649 operand of the .type assembler directive. Different svr4 assemblers
650 expect various different forms for this operand. The one given here
651 is just a default. You may need to override it in your machine-
652 specific tm.h file (depending upon the particulars of your assembler). */
654 #define TYPE_OPERAND_FMT "@%s"
656 /* Write the extra assembler code needed to declare a function's result.
657 Most svr4 assemblers don't require any special declaration of the
658 result value, but there are exceptions. */
660 #ifndef ASM_DECLARE_RESULT
661 #define ASM_DECLARE_RESULT(FILE, RESULT)
664 /* These macros generate the special .type and .size directives which
665 are used to set the corresponding fields of the linker symbol table
666 entries in an ELF object file under SVR4. These macros also output
667 the starting labels for the relevant functions/objects. */
669 /* Write the extra assembler code needed to declare a function properly.
670 Some svr4 assemblers need to also have something extra said about the
671 function's return value. We allow for that here. */
673 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
675 fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
676 assemble_name (FILE, NAME); \
678 fprintf (FILE, TYPE_OPERAND_FMT, "function"); \
680 ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
681 ASM_OUTPUT_LABEL(FILE, NAME); \
684 /* Write the extra assembler code needed to declare an object properly. */
686 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
688 fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
689 assemble_name (FILE, NAME); \
691 fprintf (FILE, TYPE_OPERAND_FMT, "object"); \
693 size_directive_output = 0; \
694 if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \
696 size_directive_output = 1; \
697 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
698 assemble_name (FILE, NAME); \
699 fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \
701 ASM_OUTPUT_LABEL(FILE, NAME); \
704 /* Output the size directive for a decl in rest_of_decl_compilation
705 in the case where we did not do so before the initializer.
706 Once we find the error_mark_node, we know that the value of
707 size_directive_output was set
708 by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */
710 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \
712 char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \
713 if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \
714 && ! AT_END && TOP_LEVEL \
715 && DECL_INITIAL (DECL) == error_mark_node \
716 && !size_directive_output) \
718 size_directive_output = 1; \
719 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
720 assemble_name (FILE, name); \
721 fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \
725 /* This is how to declare the size of a function. */
727 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
729 if (!flag_inhibit_size_directive) \
732 static int labelno; \
734 ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno); \
735 ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno); \
736 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
737 assemble_name (FILE, (FNAME)); \
738 fprintf (FILE, ","); \
739 assemble_name (FILE, label); \
740 fprintf (FILE, "-"); \
741 assemble_name (FILE, (FNAME)); \
746 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
747 ASM_OUTPUT_LIMITED_STRING macros. Each byte in the table
748 corresponds to a particular byte value [0..255]. For any
749 given byte value, if the value in the corresponding table
750 position is zero, the given character can be output directly.
751 If the table value is 1, the byte must be output as a \ooo
752 octal escape. If the tables value is anything else, then the
753 byte value should be output as a \ followed by the value
754 in the table. Note that we can use standard UN*X escape
755 sequences for many control characters, but we don't use
756 \a to represent BEL because some svr4 assemblers (e.g. on
757 the i386) don't know about that. Also, we don't use \v
758 since some versions of gas, such as 2.2 did not accept it. */
761 "\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\
762 \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\
763 \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\
764 \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\
765 \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\
766 \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\
767 \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\
768 \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"
770 /* Some svr4 assemblers have a limit on the number of characters which
771 can appear in the operand of a .string directive. If your assembler
772 has such a limitation, you should define STRING_LIMIT to reflect that
773 limit. Note that at least some svr4 assemblers have a limit on the
774 actual number of bytes in the double-quoted string, and that they
775 count each character in an escape sequence as one byte. Thus, an
776 escape sequence like \377 would count as four bytes.
778 If your target assembler doesn't support the .string directive, you
779 should define this to zero.
782 #define STRING_LIMIT ((unsigned) 256)
784 #define STRING_ASM_OP ".string"
786 /* The routine used to output NUL terminated strings. We use a special
787 version of this for most svr4 targets because doing so makes the
788 generated assembly code more compact (and thus faster to assemble)
789 as well as more readable, especially for targets like the i386
790 (where the only alternative is to output character sequences as
791 comma separated lists of numbers). */
793 #define ASM_OUTPUT_LIMITED_STRING(FILE, STR) \
796 register unsigned char *_limited_str = (unsigned char *) (STR); \
797 register unsigned ch; \
798 fprintf ((FILE), "\t%s\t\"", STRING_ASM_OP); \
799 for (; ch = *_limited_str; _limited_str++) \
801 register int escape; \
802 switch (escape = ESCAPES[ch]) \
808 fprintf ((FILE), "\\%03o", ch); \
811 putc ('\\', (FILE)); \
812 putc (escape, (FILE)); \
816 fprintf ((FILE), "\"\n"); \
820 /* The routine used to output sequences of byte values. We use a special
821 version of this for most svr4 targets because doing so makes the
822 generated assembly code more compact (and thus faster to assemble)
823 as well as more readable. Note that if we find subparts of the
824 character sequence which end with NUL (and which are shorter than
825 STRING_LIMIT) we output those using ASM_OUTPUT_LIMITED_STRING. */
827 #undef ASM_OUTPUT_ASCII
828 #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \
831 register unsigned char *_ascii_bytes = (unsigned char *) (STR); \
832 register unsigned char *limit = _ascii_bytes + (LENGTH); \
833 register unsigned bytes_in_chunk = 0; \
834 for (; _ascii_bytes < limit; _ascii_bytes++) \
836 register unsigned char *p; \
837 if (bytes_in_chunk >= 60) \
839 fprintf ((FILE), "\"\n"); \
840 bytes_in_chunk = 0; \
842 for (p = _ascii_bytes; p < limit && *p != '\0'; p++) \
844 if (p < limit && (p - _ascii_bytes) <= STRING_LIMIT) \
846 if (bytes_in_chunk > 0) \
848 fprintf ((FILE), "\"\n"); \
849 bytes_in_chunk = 0; \
851 ASM_OUTPUT_LIMITED_STRING ((FILE), _ascii_bytes); \
856 register int escape; \
857 register unsigned ch; \
858 if (bytes_in_chunk == 0) \
859 fprintf ((FILE), "\t%s\t\"", ASCII_DATA_ASM_OP); \
860 switch (escape = ESCAPES[ch = *_ascii_bytes]) \
867 fprintf ((FILE), "\\%03o", ch); \
868 bytes_in_chunk += 4; \
871 putc ('\\', (FILE)); \
872 putc (escape, (FILE)); \
873 bytes_in_chunk += 2; \
878 if (bytes_in_chunk > 0) \
879 fprintf ((FILE), "\"\n"); \
883 /* All SVR4 targets use the ELF object file format. */
884 #define OBJECT_FORMAT_ELF