1 /* Definitions of target machine for GNU compiler. IRIX version 6.
2 Copyright (C) 1994, 1995, 1996, 1997, 1998, 2000, 2001, 2002, 2003
3 Free Software Foundation, Inc.
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* Let mips.c know we need the IRIX 6 functions. */
23 #define TARGET_IRIX6 1
25 /* Default to -mabi=n32 and -mips3. */
26 #undef MULTILIB_DEFAULTS
27 #define MULTILIB_DEFAULTS { "mabi=n32" }
29 /* IRIX 6 assembler does handle DWARF2 directives. Override setting in
31 #undef DWARF2_UNWIND_INFO
33 /* The IRIX 6 assembler will sometimes assign labels to the wrong
34 section unless the labels are within .ent/.end blocks. Therefore,
35 we avoid creating such labels. */
36 #define DWARF2_GENERATE_TEXT_SECTION_LABEL 0
38 /* wchar_t is defined differently with and without -mabi=64. */
41 #define WCHAR_TYPE (Pmode == DImode ? "int" : "long int")
43 #undef WCHAR_TYPE_SIZE
44 #define WCHAR_TYPE_SIZE 32
46 /* Same for wint_t. */
49 #define WINT_TYPE (Pmode == DImode ? "int" : "long int")
52 #define WINT_TYPE_SIZE 32
54 /* For IRIX 6, -mabi=64 implies TARGET_LONG64. */
55 /* This is handled in override_options. */
57 #undef SUBTARGET_CC1_SPEC
58 #define SUBTARGET_CC1_SPEC ""
60 /* We must pass -D_LONGLONG always, even when -ansi is used, because IRIX 6
61 system header files require it. This is OK, because gcc never warns
62 when long long is used in system header files. Alternatively, we can
63 add support for the SGI builtin type __long_long. */
65 /* The GNU C++ standard library requires that __EXTENSIONS__ and
66 _SGI_SOURCE be defined on at least IRIX 6.2 and probably all IRIX 6
67 prior to 6.5. They normally get defined if !ansi, for g++ we want
68 them regardless. We don't need this on IRIX 6.5 itself, but it
69 shouldn't hurt other than the namespace pollution. */
71 /* Undefine because this includes iris5.h. */
72 #undef TARGET_OS_CPP_BUILTINS
73 #define TARGET_OS_CPP_BUILTINS() \
75 builtin_define_std ("host_mips"); \
76 builtin_define ("_LONGLONG"); \
77 builtin_define ("_MODERN_C"); \
78 builtin_define ("_SVR4_SOURCE"); \
79 builtin_define_std ("SYSTYPE_SVR4"); \
80 builtin_define ("__DSO__"); \
81 builtin_define_std ("unix"); \
82 builtin_define_std ("sgi"); \
83 builtin_assert ("system=svr4"); \
84 builtin_assert ("system=unix"); \
85 builtin_assert ("machine=sgi"); \
87 if (mips_abi == ABI_32) \
89 builtin_define ("_MIPS_SIM=_MIPS_SIM_ABI32"); \
90 builtin_define ("_MIPS_SZLONG=32"); \
91 builtin_define ("_MIPS_SZPTR=32"); \
93 else if (mips_abi == ABI_64) \
95 builtin_define ("_ABI64=3"); \
96 builtin_define ("_MIPS_SIM=_ABI64"); \
97 builtin_define ("_MIPS_SZLONG=64"); \
98 builtin_define ("_MIPS_SZPTR=64"); \
102 builtin_define ("_ABIN32=2"); \
103 builtin_define ("_MIPS_SIM=_ABIN32"); \
104 builtin_define ("_MIPS_SZLONG=32"); \
105 builtin_define ("_MIPS_SZPTR=32"); \
108 if (!TARGET_FLOAT64) \
109 builtin_define ("_MIPS_FPSET=16"); \
111 builtin_define ("_MIPS_FPSET=32"); \
114 builtin_define ("_MIPS_SZINT=32"); \
116 builtin_define ("_MIPS_SZINT=64"); \
118 if (!ISA_MIPS1 && !ISA_MIPS2) \
119 builtin_define ("_COMPILER_VERSION=601"); \
121 /* IRIX 6.5.18 and above provide many ISO C99 \
122 features protected by the __c99 macro. \
123 libstdc++ v3 needs them as well. */ \
124 if ((!c_dialect_cxx () && flag_isoc99) \
125 || c_dialect_cxx ()) \
126 builtin_define ("__c99"); \
128 if (c_dialect_cxx ()) \
130 builtin_define ("__EXTENSIONS__"); \
131 builtin_define ("_SGI_SOURCE"); \
136 builtin_define ("__EXTENSIONS__"); \
137 builtin_define ("_SGI_SOURCE"); \
141 /* IRIX 6 uses DWARF-2. */
142 #define DWARF2_DEBUGGING_INFO 1
143 #define MIPS_DEBUGGING_INFO 1
144 #undef PREFERRED_DEBUGGING_TYPE
145 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
147 /* Force the generation of dwarf .debug_frame sections even if not
148 compiling -g. This guarantees that we can unwind the stack. */
149 #define DWARF2_FRAME_INFO 1
151 /* The size in bytes of a DWARF field indicating an offset or length
152 relative to a debug info section, specified to be 4 bytes in the DWARF-2
153 specification. The SGI/MIPS ABI defines it to be the same as PTR_SIZE. */
154 #define DWARF_OFFSET_SIZE PTR_SIZE
156 /* The size in bytes of the initial length field in a debug info
157 section. The DWARF 3 (draft) specification defines this to be
158 either 4 or 12 (with a 4-byte "escape" word when it's 12), but the
159 SGI/MIPS ABI predates this standard and defines it to be the same
160 as DWARF_OFFSET_SIZE. */
161 #define DWARF_INITIAL_LENGTH_SIZE DWARF_OFFSET_SIZE
163 /* There is no GNU as port for IRIX 6 yet, so we set MD_EXEC_PREFIX so that
164 gcc will automatically find SGI as instead of searching the user's path.
165 The latter can fail when building a cross compiler if the user has . in
166 the path before /usr/bin, since then gcc will find and try to use the link
167 to the cross assembler which can't possibly work. */
169 #undef MD_EXEC_PREFIX
170 #define MD_EXEC_PREFIX "/usr/bin/"
172 /* We have no need for MD_STARTFILE_PREFIX. */
173 #undef MD_STARTFILE_PREFIX
176 #define MACHINE_TYPE "SGI running IRIX 6.x"
178 /* IRIX 5 stuff that we don't need for IRIX 6. */
179 /* ??? We do need this for the -mabi=32 switch though. */
180 #undef ASM_OUTPUT_UNDEF_FUNCTION
181 #undef ASM_OUTPUT_EXTERNAL_LIBCALL
182 #undef ASM_DECLARE_FUNCTION_SIZE
184 /* Stuff we need for IRIX 6 that isn't in IRIX 5. */
186 /* The SGI assembler doesn't like labels before the .ent, so we must output
187 the .ent and function name here, which is the normal place for it. */
189 #undef ASM_DECLARE_FUNCTION_NAME
190 #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) \
192 fputs ("\t.ent\t", STREAM); \
193 assemble_name (STREAM, NAME); \
194 fputs ("\n", STREAM); \
195 assemble_name (STREAM, NAME); \
196 fputs (":\n", STREAM); \
199 /* Likewise, the SGI assembler doesn't like labels after the .end, so we
200 must output the .end here. */
201 #define ASM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL) \
203 fputs ("\t.end\t", STREAM); \
204 assemble_name (STREAM, NAME); \
205 fputs ("\n", STREAM); \
208 /* Tell function_prologue in mips.c that we have already output the .ent/.end
210 #define FUNCTION_NAME_ALREADY_DECLARED
212 #undef SET_ASM_OP /* Has no equivalent. See ASM_OUTPUT_DEF below. */
215 /* This is *NOT* how to equate one symbol to another symbol. The assembler
216 '=' syntax just equates a name to a constant expression.
217 See ASM_OUTPUT_WEAK_ALIAS. */
219 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
220 do { fprintf ((FILE), "\t"); \
221 assemble_name (FILE, LABEL1); \
222 fprintf (FILE, " = "); \
223 assemble_name (FILE, LABEL2); \
224 fprintf (FILE, "\n"); \
228 /* Define the strings used for the special svr4 .type and .size directives. */
230 #define TYPE_ASM_OP "\t.type\t"
231 #define SIZE_ASM_OP "\t.size\t"
233 /* IRIX assembler does not support the init_priority C++ attribute. */
234 #undef SUPPORTS_INIT_PRIORITY
235 #define SUPPORTS_INIT_PRIORITY 0
237 /* A linker error can empirically be avoided by removing duplicate
238 library search directories. */
239 #define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 1
241 #define POPSECTION_ASM_OP "\t.popsection"
243 /* ??? If no mabi=X option give, but a mipsX option is, then should depend
244 on the mipsX option. */
245 /* If no mips[3,4] option given, give the appropriate default for mabi=X */
246 #undef SUBTARGET_ASM_SPEC
247 #define SUBTARGET_ASM_SPEC "%{!mabi*:-n32} %{!mips*: %{!mabi*:-mips3} %{mabi=n32|mabi=64:-mips3}}"
249 /* Must pass -g0 to the assembler, otherwise it may overwrite our
250 debug info with its own debug info. */
251 /* Must pass -show instead of -v. */
252 /* Must pass -G 0 to the assembler, otherwise we may get warnings about
254 /* ??? We pass -w to disable all assembler warnings. The `label should be
255 inside .ent/.end block' warning that we get for DWARF II debug info labels
256 is particularly annoying. */
257 #undef SUBTARGET_MIPS_AS_ASM_SPEC
258 #define SUBTARGET_MIPS_AS_ASM_SPEC "%{v:-show} -G 0 -w"
260 #undef SUBTARGET_ASM_DEBUGGING_SPEC
261 #define SUBTARGET_ASM_DEBUGGING_SPEC "-g0"
263 /* The MIPS assembler occasionally misoptimizes. Since GCC should be
264 doing scheduling anyhow, just turn off optimization in the assembler. */
265 #undef SUBTARGET_ASM_OPTIMIZING_SPEC
266 #define SUBTARGET_ASM_OPTIMIZING_SPEC "-O0"
268 /* The assembler now accepts .section pseudo-ops, but it does not allow
269 one to change the section in the middle of a function, so we can't use
270 the INIT_SECTION_ASM_OP code in crtstuff. But we can build up the ctor
271 and dtor lists this way, so we use -init and -fini to invoke the
272 do_global_* functions instead of running collect2. */
274 #define BSS_SECTION_ASM_OP "\t.section\t.bss"
276 #undef READONLY_DATA_SECTION_ASM_OP
277 #define READONLY_DATA_SECTION_ASM_OP_32 "\t.rdata"
278 #define READONLY_DATA_SECTION_ASM_OP_64 "\t.section\t.rodata"
279 #define READONLY_DATA_SECTION_ASM_OP \
280 (mips_abi != ABI_32 && mips_abi != ABI_O64 \
281 ? READONLY_DATA_SECTION_ASM_OP_64 \
282 : READONLY_DATA_SECTION_ASM_OP_32)
284 /* A default list of other sections which we might be "in" at any given
285 time. For targets that use additional sections (e.g. .tdesc) you
286 should override this definition in the target-specific file which
287 includes this file. */
289 #undef EXTRA_SECTIONS
290 #define EXTRA_SECTIONS in_sdata
292 /* A default list of extra section function definitions. For targets
293 that use additional sections (e.g. .tdesc) you should override this
294 definition in the target-specific file which includes this file. */
296 #undef EXTRA_SECTION_FUNCTIONS
297 #define EXTRA_SECTION_FUNCTIONS \
301 if (in_section != in_sdata) \
303 fprintf (asm_out_file, "%s\n", SDATA_SECTION_ASM_OP); \
304 in_section = in_sdata; \
309 current_section_name () \
311 switch (in_section) \
313 case no_section: return NULL; \
314 case in_text: return ".text"; \
315 case in_data: return ".data"; \
316 case in_sdata: return ".sdata"; \
317 case in_bss: return ".bss"; \
318 case in_readonly_data: \
319 if (mips_abi != ABI_32 && mips_abi != ABI_O64) \
324 return in_named_name; \
330 current_section_flags () \
332 switch (in_section) \
334 case no_section: return 0; \
335 case in_text: return SECTION_CODE; \
336 case in_data: return SECTION_WRITE; \
337 case in_sdata: return SECTION_WRITE | SECTION_SMALL; \
338 case in_bss: return SECTION_WRITE | SECTION_BSS; \
339 case in_readonly_data: return 0; \
340 case in_named: return get_named_section_flags (in_named_name); \
345 /* Switch into a generic section. */
346 #undef TARGET_ASM_NAMED_SECTION
347 #define TARGET_ASM_NAMED_SECTION iris6_asm_named_section
349 /* SGI assembler needs all sorts of extra help to do alignment properly. */
350 #undef ASM_OUTPUT_ALIGN
351 #define ASM_OUTPUT_ALIGN iris6_asm_output_align
353 #undef MAX_OFILE_ALIGNMENT
354 #define MAX_OFILE_ALIGNMENT (32768*8)
356 /* ??? SGI assembler may core dump when compiling with -g.
357 Sometimes as succeeds, but then we get a linker error. (cmds.c in 072.sc)
358 Getting rid of .file solves both problems. */
359 #undef ASM_OUTPUT_FILENAME
360 #define ASM_OUTPUT_FILENAME(STREAM, NUM_SOURCE_FILENAMES, NAME) \
363 fprintf (STREAM, "\t#.file\t%d ", NUM_SOURCE_FILENAMES); \
364 output_quoted_string (STREAM, NAME); \
365 fputs ("\n", STREAM); \
369 /* ??? SGI assembler gives warning whenever .lcomm is used. */
370 #undef ASM_OUTPUT_LOCAL
371 #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGN) \
374 if (mips_abi != ABI_32 && mips_abi != ABI_O64) \
377 mips_declare_object (STREAM, NAME, "", ":\n", 0); \
378 ASM_OUTPUT_ALIGN (STREAM, floor_log2 (ALIGN / BITS_PER_UNIT)); \
379 ASM_OUTPUT_SKIP (STREAM, SIZE); \
382 mips_declare_object (STREAM, NAME, "\n\t.lcomm\t", ",%u\n", (int)(SIZE)); \
386 /* A C statement (sans semicolon) to output to the stdio stream
387 FILE the assembler definition of uninitialized global DECL named
388 NAME whose size is SIZE bytes and alignment is ALIGN bytes.
389 Try to use asm_output_aligned_bss to implement this macro. */
391 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
392 asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
394 /* Write the extra assembler code needed to declare an object properly. */
396 #undef ASM_DECLARE_OBJECT_NAME
397 #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) \
400 HOST_WIDE_INT size; \
401 size_directive_output = 0; \
402 if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \
404 size_directive_output = 1; \
405 size = int_size_in_bytes (TREE_TYPE (DECL)); \
406 ASM_OUTPUT_SIZE_DIRECTIVE (STREAM, NAME, size); \
408 mips_declare_object (STREAM, NAME, "", ":\n", 0); \
412 /* Define the `__builtin_va_list' type for the ABI. On IRIX 6, this
414 #undef BUILD_VA_LIST_TYPE
415 #define BUILD_VA_LIST_TYPE(VALIST) \
416 (VALIST) = build_pointer_type (char_type_node)
418 /* Output the size directive for a decl in rest_of_decl_compilation
419 in the case where we did not do so before the initializer.
420 Once we find the error_mark_node, we know that the value of
421 size_directive_output was set
422 by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */
424 #undef ASM_FINISH_DECLARE_OBJECT
425 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \
427 const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \
428 HOST_WIDE_INT size; \
429 if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \
430 && ! AT_END && TOP_LEVEL \
431 && DECL_INITIAL (DECL) == error_mark_node \
432 && !size_directive_output) \
434 size_directive_output = 1; \
435 size = int_size_in_bytes (TREE_TYPE (DECL)); \
436 ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size); \
440 #undef LOCAL_LABEL_PREFIX
441 #define LOCAL_LABEL_PREFIX ((mips_abi == ABI_32 || mips_abi == ABI_O64) \
444 /* Profiling is supported via libprof1.a not -lc_p as in IRIX 3. */
445 /* ??? If no mabi=X option give, but a mipsX option is, then should depend
446 on the mipsX option. */
447 #undef STARTFILE_SPEC
448 #define STARTFILE_SPEC \
450 %{mabi=32:%{pg:gcrt1.o%s} \
451 %{!pg:%{p:mcrt1.o%s libprof1.a%s}%{!p:crt1.o%s}}} \
453 %{mips4:%{pg:/usr/lib32/mips4/gcrt1.o%s} \
454 %{!pg:%{p:/usr/lib32/mips4/mcrt1.o%s /usr/lib32/mips4/libprof1.a%s} \
455 %{!p:/usr/lib32/mips4/crt1.o%s}}} \
456 %{!mips4:%{pg:/usr/lib32/mips3/gcrt1.o%s} \
457 %{!pg:%{p:/usr/lib32/mips3/mcrt1.o%s /usr/lib32/mips3/libprof1.a%s} \
458 %{!p:/usr/lib32/mips3/crt1.o%s}}}} \
460 %{mips4:%{pg:/usr/lib64/mips4/gcrt1.o} \
461 %{!pg:%{p:/usr/lib64/mips4/mcrt1.o /usr/lib64/mips4/libprof1.a} \
462 %{!p:/usr/lib64/mips4/crt1.o}}} \
463 %{!mips4:%{pg:/usr/lib64/mips3/gcrt1.o} \
464 %{!pg:%{p:/usr/lib64/mips3/mcrt1.o /usr/lib64/mips3/libprof1.a} \
465 %{!p:/usr/lib64/mips3/crt1.o}}}} \
467 %{mips4:%{pg:/usr/lib32/mips4/gcrt1.o%s} \
468 %{!pg:%{p:/usr/lib32/mips4/mcrt1.o%s /usr/lib32/mips4/libprof1.a%s} \
469 %{!p:/usr/lib32/mips4/crt1.o%s}}} \
470 %{!mips4:%{pg:/usr/lib32/mips3/gcrt1.o%s} \
471 %{!pg:%{p:/usr/lib32/mips3/mcrt1.o%s /usr/lib32/mips3/libprof1.a%s} \
472 %{!p:/usr/lib32/mips3/crt1.o%s}}}}} \
477 "%{mabi=n32: %{mips4:-L/usr/lib32/mips4} %{!mips4:-L/usr/lib32/mips3} \
479 %{mabi=64: %{mips4:-L/usr/lib64/mips4} %{!mips4:-L/usr/lib64/mips3} \
481 %{!mabi*: %{mips4:-L/usr/lib32/mips4} %{!mips4:-L/usr/lib32/mips3} \
484 -dont_warn_unused %{p:libprof1.a%s}%{pg:libprof1.a%s} -lc -warn_unused}"
486 /* Avoid getting two warnings for libgcc.a everytime we link. */
488 #define LIBGCC_SPEC "-dont_warn_unused -lgcc -warn_unused"
490 /* ??? If no mabi=X option give, but a mipsX option is, then should depend
491 on the mipsX option. */
493 #define ENDFILE_SPEC \
497 %{mabi=n32:%{mips4:/usr/lib32/mips4/crtn.o%s}\
498 %{!mips4:/usr/lib32/mips3/crtn.o%s}}\
499 %{mabi=64:%{mips4:/usr/lib64/mips4/crtn.o%s}\
500 %{!mips4:/usr/lib64/mips3/crtn.o%s}}\
501 %{!mabi*:%{mips4:/usr/lib32/mips4/crtn.o%s}\
502 %{!mips4:/usr/lib32/mips3/crtn.o%s}}}"
504 /* ??? If no mabi=X option give, but a mipsX option is, then should depend
505 on the mipsX option. */
508 %{G*} %{EB} %{EL} %{mips1} %{mips2} %{mips3} %{mips4} \
509 %{bestGnum} %{shared} %{non_shared} \
510 %{call_shared} %{no_archive} %{exact_version} %{w} \
511 %{!shared: %{!non_shared: %{!call_shared: -call_shared -no_unresolved}}} \
512 %{rpath} -init __do_global_ctors -fini __do_global_dtors \
513 %{shared:-hidden_symbol __do_global_ctors,__do_global_ctors_1,__do_global_dtors} \
514 -_SYSTYPE_SVR4 -woff 131 \
515 %{mabi=32: -32}%{mabi=n32: -n32}%{mabi=64: -64}%{!mabi*: -n32}"
517 #define MIPS_TFMODE_FORMAT mips_extended_format