1 /* Definitions of target machine for GNU compiler. Iris 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 Irix6 functions. */
23 #define TARGET_IRIX6 1
25 /* Default to -mabi=n32 and -mips3. */
26 #define MIPS_ISA_DEFAULT 3
27 #define MIPS_ABI_DEFAULT ABI_N32
28 #define MULTILIB_DEFAULTS { "mabi=n32" }
30 #ifndef TARGET_DEFAULT
31 #define TARGET_DEFAULT (MASK_ABICALLS|MASK_FLOAT64|MASK_64BIT)
34 #include "mips/iris5.h"
36 /* Irix6 assembler does handle DWARF2 directives. Override setting in
38 #undef DWARF2_UNWIND_INFO
40 /* The Irix6 assembler will sometimes assign labels to the wrong
41 section unless the labels are within .ent/.end blocks. Therefore,
42 we avoid creating such labels. */
43 #define DWARF2_GENERATE_TEXT_SECTION_LABEL 0
45 /* wchar_t is defined differently with and without -mabi=64. */
48 #define WCHAR_TYPE (Pmode == DImode ? "int" : "long int")
50 #undef WCHAR_TYPE_SIZE
51 #define WCHAR_TYPE_SIZE 32
53 /* Same for wint_t. */
56 #define WINT_TYPE (Pmode == DImode ? "int" : "long int")
59 #define WINT_TYPE_SIZE 32
61 /* For Irix 6, -mabi=64 implies TARGET_LONG64. */
62 /* This is handled in override_options. */
64 #undef SUBTARGET_CC1_SPEC
65 #define SUBTARGET_CC1_SPEC ""
67 /* We must pass -D_LONGLONG always, even when -ansi is used, because irix6
68 system header files require it. This is OK, because gcc never warns
69 when long long is used in system header files. Alternatively, we can
70 add support for the SGI builtin type __long_long. */
72 /* The GNU C++ standard library requires that __EXTENSIONS__ and
73 _SGI_SOURCE be defined on at least irix6.2 and probably all IRIX 6
74 prior to 6.5. They normally get defined if !ansi, for g++ we want
75 them regardless. We don't need this on IRIX 6.5 itself, but it
76 shouldn't hurt other than the namespace pollution. */
78 /* Undefine because this includes iris5.h. */
79 #undef TARGET_OS_CPP_BUILTINS
80 #define TARGET_OS_CPP_BUILTINS() \
82 builtin_define_std ("host_mips"); \
83 builtin_define ("_LONGLONG"); \
84 builtin_define ("_MODERN_C"); \
85 builtin_define ("_SVR4_SOURCE"); \
86 builtin_define_std ("SYSTYPE_SVR4"); \
87 builtin_define ("__DSO__"); \
88 builtin_define_std ("unix"); \
89 builtin_define_std ("sgi"); \
90 builtin_assert ("system=svr4"); \
91 builtin_assert ("system=unix"); \
92 builtin_assert ("machine=sgi"); \
94 if (mips_abi == ABI_32) \
96 builtin_define ("_MIPS_SIM=_MIPS_SIM_ABI32"); \
97 builtin_define ("_MIPS_SZLONG=32"); \
98 builtin_define ("_MIPS_SZPTR=32"); \
100 else if (mips_abi == ABI_64) \
102 builtin_define ("_ABI64=3"); \
103 builtin_define ("_MIPS_SIM=_ABI64"); \
104 builtin_define ("_MIPS_SZLONG=64"); \
105 builtin_define ("_MIPS_SZPTR=64"); \
109 builtin_define ("_ABIN32=2"); \
110 builtin_define ("_MIPS_SIM=_ABIN32"); \
111 builtin_define ("_MIPS_SZLONG=32"); \
112 builtin_define ("_MIPS_SZPTR=32"); \
115 if (!TARGET_FLOAT64) \
116 builtin_define ("_MIPS_FPSET=16"); \
118 builtin_define ("_MIPS_FPSET=32"); \
121 builtin_define ("_MIPS_SZINT=32"); \
123 builtin_define ("_MIPS_SZINT=64"); \
125 if (!ISA_MIPS1 && !ISA_MIPS2) \
126 builtin_define ("_COMPILER_VERSION=601"); \
128 /* IRIX 6.5.18 and above provide many ISO C99 \
129 features protected by the __c99 macro. \
130 libstdc++ v3 needs them as well. */ \
131 if ((c_language == clk_c && flag_isoc99) \
132 || c_language == clk_cplusplus) \
133 builtin_define ("__c99"); \
135 if (c_language == clk_cplusplus) \
137 builtin_define ("__EXTENSIONS__"); \
138 builtin_define ("_SGI_SOURCE"); \
143 builtin_define ("__EXTENSIONS__"); \
144 builtin_define ("_SGI_SOURCE"); \
148 /* Irix 6 uses DWARF-2. */
149 #define DWARF2_DEBUGGING_INFO 1
150 #define MIPS_DEBUGGING_INFO 1
151 #undef PREFERRED_DEBUGGING_TYPE
152 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
154 /* Force the generation of dwarf .debug_frame sections even if not
155 compiling -g. This guarantees that we can unwind the stack. */
156 #define DWARF2_FRAME_INFO 1
158 /* The size in bytes of a DWARF field indicating an offset or length
159 relative to a debug info section, specified to be 4 bytes in the DWARF-2
160 specification. The SGI/MIPS ABI defines it to be the same as PTR_SIZE. */
161 #define DWARF_OFFSET_SIZE PTR_SIZE
163 /* The size in bytes of the initial length field in a debug info
164 section. The DWARF 3 (draft) specification defines this to be
165 either 4 or 12 (with a 4-byte "escape" word when it's 12), but the
166 SGI/MIPS ABI predates this standard and defines it to be the same
167 as DWARF_OFFSET_SIZE. */
168 #define DWARF_INITIAL_LENGTH_SIZE DWARF_OFFSET_SIZE
170 /* There is no GNU as port for Irix6 yet, so we set MD_EXEC_PREFIX so that
171 gcc will automatically find SGI as instead of searching the user's path.
172 The latter can fail when building a cross compiler if the user has . in
173 the path before /usr/bin, since then gcc will find and try to use the link
174 to the cross assembler which can't possibly work. */
176 #undef MD_EXEC_PREFIX
177 #define MD_EXEC_PREFIX "/usr/bin/"
179 /* We have no need for MD_STARTFILE_PREFIX. */
180 #undef MD_STARTFILE_PREFIX
183 #define MACHINE_TYPE "SGI running IRIX 6.x"
185 /* Irix 5 stuff that we don't need for Irix 6. */
186 /* ??? We do need this for the -mabi=32 switch though. */
187 #undef ASM_OUTPUT_UNDEF_FUNCTION
188 #undef ASM_OUTPUT_EXTERNAL_LIBCALL
189 #undef ASM_DECLARE_FUNCTION_SIZE
191 /* Stuff we need for Irix 6 that isn't in Irix 5. */
193 /* The SGI assembler doesn't like labels before the .ent, so we must output
194 the .ent and function name here, which is the normal place for it. */
196 #undef ASM_DECLARE_FUNCTION_NAME
197 #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) \
199 fputs ("\t.ent\t", STREAM); \
200 assemble_name (STREAM, NAME); \
201 fputs ("\n", STREAM); \
202 assemble_name (STREAM, NAME); \
203 fputs (":\n", STREAM); \
206 /* Likewise, the SGI assembler doesn't like labels after the .end, so we
207 must output the .end here. */
208 #define ASM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL) \
210 fputs ("\t.end\t", STREAM); \
211 assemble_name (STREAM, NAME); \
212 fputs ("\n", STREAM); \
215 /* Tell function_prologue in mips.c that we have already output the .ent/.end
217 #define FUNCTION_NAME_ALREADY_DECLARED
219 #undef SET_ASM_OP /* Has no equivalent. See ASM_OUTPUT_DEF below. */
222 /* This is *NOT* how to equate one symbol to another symbol. The assembler
223 '=' syntax just equates a name to a constant expression.
224 See ASM_OUTPUT_WEAK_ALIAS. */
226 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
227 do { fprintf ((FILE), "\t"); \
228 assemble_name (FILE, LABEL1); \
229 fprintf (FILE, " = "); \
230 assemble_name (FILE, LABEL2); \
231 fprintf (FILE, "\n"); \
235 /* Define the strings used for the special svr4 .type and .size directives. */
237 #define TYPE_ASM_OP "\t.type\t"
238 #define SIZE_ASM_OP "\t.size\t"
240 /* Irix assembler does not support the init_priority C++ attribute. */
241 #undef SUPPORTS_INIT_PRIORITY
242 #define SUPPORTS_INIT_PRIORITY 0
244 /* A linker error can empirically be avoided by removing duplicate
245 library search directories. */
246 #define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 1
248 #define POPSECTION_ASM_OP "\t.popsection"
250 /* ??? If no mabi=X option give, but a mipsX option is, then should depend
251 on the mipsX option. */
252 /* If no mips[3,4] option given, give the appropriate default for mabi=X */
253 #undef SUBTARGET_ASM_SPEC
254 #define SUBTARGET_ASM_SPEC "%{!mabi*:-n32} %{!mips*: %{!mabi*:-mips3} %{mabi=n32|mabi=64:-mips3}}"
256 /* Must pass -g0 to the assembler, otherwise it may overwrite our
257 debug info with its own debug info. */
258 /* Must pass -show instead of -v. */
259 /* Must pass -G 0 to the assembler, otherwise we may get warnings about
261 /* ??? We pass -w to disable all assembler warnings. The `label should be
262 inside .ent/.end block' warning that we get for DWARF II debug info labels
263 is particularly annoying. */
264 #undef SUBTARGET_MIPS_AS_ASM_SPEC
265 #define SUBTARGET_MIPS_AS_ASM_SPEC "%{v:-show} -G 0 -w"
267 #undef SUBTARGET_ASM_DEBUGGING_SPEC
268 #define SUBTARGET_ASM_DEBUGGING_SPEC "-g0"
270 /* The MIPS assembler occasionally misoptimizes. Since GCC should be
271 doing scheduling anyhow, just turn off optimization in the assembler. */
272 #undef SUBTARGET_ASM_OPTIMIZING_SPEC
273 #define SUBTARGET_ASM_OPTIMIZING_SPEC "-O0"
275 /* The assembler now accepts .section pseudo-ops, but it does not allow
276 one to change the section in the middle of a function, so we can't use
277 the INIT_SECTION_ASM_OP code in crtstuff. But we can build up the ctor
278 and dtor lists this way, so we use -init and -fini to invoke the
279 do_global_* functions instead of running collect2. */
281 #define BSS_SECTION_ASM_OP "\t.section\t.bss"
283 #undef READONLY_DATA_SECTION_ASM_OP
284 #define READONLY_DATA_SECTION_ASM_OP_32 "\t.rdata"
285 #define READONLY_DATA_SECTION_ASM_OP_64 "\t.section\t.rodata"
286 #define READONLY_DATA_SECTION_ASM_OP \
287 (mips_abi != ABI_32 && mips_abi != ABI_O64 \
288 ? READONLY_DATA_SECTION_ASM_OP_64 \
289 : READONLY_DATA_SECTION_ASM_OP_32)
291 /* A default list of other sections which we might be "in" at any given
292 time. For targets that use additional sections (e.g. .tdesc) you
293 should override this definition in the target-specific file which
294 includes this file. */
296 #undef EXTRA_SECTIONS
297 #define EXTRA_SECTIONS in_sdata
299 /* A default list of extra section function definitions. For targets
300 that use additional sections (e.g. .tdesc) you should override this
301 definition in the target-specific file which includes this file. */
303 #undef EXTRA_SECTION_FUNCTIONS
304 #define EXTRA_SECTION_FUNCTIONS \
308 if (in_section != in_sdata) \
310 fprintf (asm_out_file, "%s\n", SDATA_SECTION_ASM_OP); \
311 in_section = in_sdata; \
316 current_section_name () \
318 switch (in_section) \
320 case no_section: return NULL; \
321 case in_text: return ".text"; \
322 case in_data: return ".data"; \
323 case in_sdata: return ".sdata"; \
324 case in_bss: return ".bss"; \
325 case in_readonly_data: \
326 if (mips_abi != ABI_32 && mips_abi != ABI_O64) \
331 return in_named_name; \
337 current_section_flags () \
339 switch (in_section) \
341 case no_section: return 0; \
342 case in_text: return SECTION_CODE; \
343 case in_data: return SECTION_WRITE; \
344 case in_sdata: return SECTION_WRITE | SECTION_SMALL; \
345 case in_bss: return SECTION_WRITE | SECTION_BSS; \
346 case in_readonly_data: return 0; \
347 case in_named: return get_named_section_flags (in_named_name); \
352 /* Switch into a generic section. */
353 #undef TARGET_ASM_NAMED_SECTION
354 #define TARGET_ASM_NAMED_SECTION iris6_asm_named_section
356 /* SGI assembler needs all sorts of extra help to do alignment properly. */
357 #undef ASM_OUTPUT_ALIGN
358 #define ASM_OUTPUT_ALIGN iris6_asm_output_align
359 #undef ASM_FILE_START
360 #define ASM_FILE_START iris6_asm_file_start
362 #define ASM_FILE_END iris6_asm_file_end
364 #undef MAX_OFILE_ALIGNMENT
365 #define MAX_OFILE_ALIGNMENT (32768*8)
367 /* ??? SGI assembler may core dump when compiling with -g.
368 Sometimes as succeeds, but then we get a linker error. (cmds.c in 072.sc)
369 Getting rid of .file solves both problems. */
370 #undef ASM_OUTPUT_FILENAME
371 #define ASM_OUTPUT_FILENAME(STREAM, NUM_SOURCE_FILENAMES, NAME) \
374 fprintf (STREAM, "\t#.file\t%d ", NUM_SOURCE_FILENAMES); \
375 output_quoted_string (STREAM, NAME); \
376 fputs ("\n", STREAM); \
380 /* ??? SGI assembler gives warning whenever .lcomm is used. */
381 #undef ASM_OUTPUT_LOCAL
382 #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGN) \
385 if (mips_abi != ABI_32 && mips_abi != ABI_O64) \
388 mips_declare_object (STREAM, NAME, "", ":\n", 0); \
389 ASM_OUTPUT_ALIGN (STREAM, floor_log2 (ALIGN / BITS_PER_UNIT)); \
390 ASM_OUTPUT_SKIP (STREAM, SIZE); \
393 mips_declare_object (STREAM, NAME, "\n\t.lcomm\t", ",%u\n", (int)(SIZE)); \
397 /* A C statement (sans semicolon) to output to the stdio stream
398 FILE the assembler definition of uninitialized global DECL named
399 NAME whose size is SIZE bytes and alignment is ALIGN bytes.
400 Try to use asm_output_aligned_bss to implement this macro. */
402 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
403 asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
405 /* Write the extra assembler code needed to declare an object properly. */
407 #undef ASM_DECLARE_OBJECT_NAME
408 #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) \
411 HOST_WIDE_INT size; \
412 size_directive_output = 0; \
413 if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \
415 size_directive_output = 1; \
416 size = int_size_in_bytes (TREE_TYPE (DECL)); \
417 ASM_OUTPUT_SIZE_DIRECTIVE (STREAM, NAME, size); \
419 mips_declare_object (STREAM, NAME, "", ":\n", 0); \
423 /* Define the `__builtin_va_list' type for the ABI. On Irix6, this
425 #undef BUILD_VA_LIST_TYPE
426 #define BUILD_VA_LIST_TYPE(VALIST) \
427 (VALIST) = build_pointer_type (char_type_node)
429 /* Output the size directive for a decl in rest_of_decl_compilation
430 in the case where we did not do so before the initializer.
431 Once we find the error_mark_node, we know that the value of
432 size_directive_output was set
433 by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */
435 #undef ASM_FINISH_DECLARE_OBJECT
436 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \
438 const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \
439 HOST_WIDE_INT size; \
440 if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \
441 && ! AT_END && TOP_LEVEL \
442 && DECL_INITIAL (DECL) == error_mark_node \
443 && !size_directive_output) \
445 size_directive_output = 1; \
446 size = int_size_in_bytes (TREE_TYPE (DECL)); \
447 ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size); \
451 #undef LOCAL_LABEL_PREFIX
452 #define LOCAL_LABEL_PREFIX ((mips_abi == ABI_32 || mips_abi == ABI_O64) \
455 /* Profiling is supported via libprof1.a not -lc_p as in Irix 3. */
456 /* ??? If no mabi=X option give, but a mipsX option is, then should depend
457 on the mipsX option. */
458 #undef STARTFILE_SPEC
459 #define STARTFILE_SPEC \
461 %{mabi=32:%{pg:gcrt1.o%s} \
462 %{!pg:%{p:mcrt1.o%s libprof1.a%s}%{!p:crt1.o%s}}} \
464 %{mips4:%{pg:/usr/lib32/mips4/gcrt1.o%s} \
465 %{!pg:%{p:/usr/lib32/mips4/mcrt1.o%s /usr/lib32/mips4/libprof1.a%s} \
466 %{!p:/usr/lib32/mips4/crt1.o%s}}} \
467 %{!mips4:%{pg:/usr/lib32/mips3/gcrt1.o%s} \
468 %{!pg:%{p:/usr/lib32/mips3/mcrt1.o%s /usr/lib32/mips3/libprof1.a%s} \
469 %{!p:/usr/lib32/mips3/crt1.o%s}}}} \
471 %{mips4:%{pg:/usr/lib64/mips4/gcrt1.o} \
472 %{!pg:%{p:/usr/lib64/mips4/mcrt1.o /usr/lib64/mips4/libprof1.a} \
473 %{!p:/usr/lib64/mips4/crt1.o}}} \
474 %{!mips4:%{pg:/usr/lib64/mips3/gcrt1.o} \
475 %{!pg:%{p:/usr/lib64/mips3/mcrt1.o /usr/lib64/mips3/libprof1.a} \
476 %{!p:/usr/lib64/mips3/crt1.o}}}} \
478 %{mips4:%{pg:/usr/lib32/mips4/gcrt1.o%s} \
479 %{!pg:%{p:/usr/lib32/mips4/mcrt1.o%s /usr/lib32/mips4/libprof1.a%s} \
480 %{!p:/usr/lib32/mips4/crt1.o%s}}} \
481 %{!mips4:%{pg:/usr/lib32/mips3/gcrt1.o%s} \
482 %{!pg:%{p:/usr/lib32/mips3/mcrt1.o%s /usr/lib32/mips3/libprof1.a%s} \
483 %{!p:/usr/lib32/mips3/crt1.o%s}}}}} \
488 "%{mabi=n32: %{mips4:-L/usr/lib32/mips4} %{!mips4:-L/usr/lib32/mips3} \
490 %{mabi=64: %{mips4:-L/usr/lib64/mips4} %{!mips4:-L/usr/lib64/mips3} \
492 %{!mabi*: %{mips4:-L/usr/lib32/mips4} %{!mips4:-L/usr/lib32/mips3} \
495 -dont_warn_unused %{p:libprof1.a%s}%{pg:libprof1.a%s} -lc -warn_unused}"
497 /* Avoid getting two warnings for libgcc.a everytime we link. */
499 #define LIBGCC_SPEC "-dont_warn_unused -lgcc -warn_unused"
501 /* ??? If no mabi=X option give, but a mipsX option is, then should depend
502 on the mipsX option. */
504 #define ENDFILE_SPEC \
508 %{mabi=n32:%{mips4:/usr/lib32/mips4/crtn.o%s}\
509 %{!mips4:/usr/lib32/mips3/crtn.o%s}}\
510 %{mabi=64:%{mips4:/usr/lib64/mips4/crtn.o%s}\
511 %{!mips4:/usr/lib64/mips3/crtn.o%s}}\
512 %{!mabi*:%{mips4:/usr/lib32/mips4/crtn.o%s}\
513 %{!mips4:/usr/lib32/mips3/crtn.o%s}}}"
515 /* ??? If no mabi=X option give, but a mipsX option is, then should depend
516 on the mipsX option. */
519 %{G*} %{EB} %{EL} %{mips1} %{mips2} %{mips3} %{mips4} \
520 %{bestGnum} %{shared} %{non_shared} \
521 %{call_shared} %{no_archive} %{exact_version} %{w} \
522 %{!shared: %{!non_shared: %{!call_shared: -call_shared -no_unresolved}}} \
523 %{rpath} -init __do_global_ctors -fini __do_global_dtors \
524 %{shared:-hidden_symbol __do_global_ctors,__do_global_ctors_1,__do_global_dtors} \
525 -_SYSTYPE_SVR4 -woff 131 \
526 %{mabi=32: -32}%{mabi=n32: -n32}%{mabi=64: -64}%{!mabi*: -n32}"
528 #define MIPS_TFMODE_FORMAT mips_extended_format