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1 /* Definitions of target machine for GNU compiler,
2 for 64 bit PowerPC linux.
3 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
4 2009, 2010, 2011 Free Software Foundation, Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published
10 by the Free Software Foundation; either version 3, or (at your
11 option) any later version.
13 GCC is distributed in the hope that it will be useful, but WITHOUT
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
16 License for more details.
18 Under Section 7 of GPL version 3, you are granted additional
19 permissions described in the GCC Runtime Library Exception, version
20 3.1, as published by the Free Software Foundation.
22 You should have received a copy of the GNU General Public License and
23 a copy of the GCC Runtime Library Exception along with this program;
24 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
25 <http://www.gnu.org/licenses/>. */
27 #ifndef RS6000_BI_ARCH
30 #define DEFAULT_ABI ABI_AIX
33 #define TARGET_64BIT 1
35 #define DEFAULT_ARCH64_P 1
36 #define RS6000_BI_ARCH_P 0
40 #define DEFAULT_ARCH64_P (TARGET_DEFAULT & MASK_64BIT)
41 #define RS6000_BI_ARCH_P 1
48 #define TARGET_64BIT 1
50 #define TARGET_64BIT 0
55 #define TARGET_AIX TARGET_64BIT
57 #ifdef HAVE_LD_NO_DOT_SYMS
58 /* New ABI uses a local sym for the function entry point. */
59 extern int dot_symbols
;
61 #define DOT_SYMBOLS dot_symbols
64 #define TARGET_PROFILE_KERNEL profile_kernel
66 #define TARGET_USES_LINUX64_OPT 1
67 #ifdef HAVE_LD_LARGE_TOC
69 #define TARGET_CMODEL rs6000_current_cmodel
70 #define SET_CMODEL(opt) rs6000_current_cmodel = opt
72 #define SET_CMODEL(opt) do {} while (0)
75 #undef PROCESSOR_DEFAULT
76 #define PROCESSOR_DEFAULT PROCESSOR_POWER7
77 #undef PROCESSOR_DEFAULT64
78 #define PROCESSOR_DEFAULT64 PROCESSOR_POWER7
80 /* We don't need to generate entries in .fixup, except when
81 -mrelocatable or -mrelocatable-lib is given. */
82 #undef RELOCATABLE_NEEDS_FIXUP
83 #define RELOCATABLE_NEEDS_FIXUP \
84 (target_flags & target_flags_explicit & MASK_RELOCATABLE)
86 #undef RS6000_ABI_NAME
87 #define RS6000_ABI_NAME "linux"
89 #define INVALID_64BIT "-m%s not supported in this configuration"
90 #define INVALID_32BIT INVALID_64BIT
92 #undef SUBSUBTARGET_OVERRIDE_OPTIONS
93 #define SUBSUBTARGET_OVERRIDE_OPTIONS \
96 if (!global_options_set.x_rs6000_alignment_flags) \
97 rs6000_alignment_flags = MASK_ALIGN_NATURAL; \
100 if (DEFAULT_ABI != ABI_AIX) \
102 rs6000_current_abi = ABI_AIX; \
103 error (INVALID_64BIT, "call"); \
105 dot_symbols = !strcmp (rs6000_abi_name, "aixdesc"); \
106 if (target_flags & MASK_RELOCATABLE) \
108 target_flags &= ~MASK_RELOCATABLE; \
109 error (INVALID_64BIT, "relocatable"); \
111 if (target_flags & MASK_EABI) \
113 target_flags &= ~MASK_EABI; \
114 error (INVALID_64BIT, "eabi"); \
116 if (TARGET_PROTOTYPE) \
118 target_prototype = 0; \
119 error (INVALID_64BIT, "prototype"); \
121 if ((target_flags & MASK_POWERPC64) == 0) \
123 target_flags |= MASK_POWERPC64; \
124 error ("-m64 requires a PowerPC64 cpu"); \
126 if ((target_flags_explicit & MASK_MINIMAL_TOC) != 0) \
128 if (global_options_set.x_rs6000_current_cmodel \
129 && rs6000_current_cmodel != CMODEL_SMALL) \
130 error ("-mcmodel incompatible with other toc options"); \
131 SET_CMODEL (CMODEL_SMALL); \
135 if (!global_options_set.x_rs6000_current_cmodel) \
136 SET_CMODEL (CMODEL_MEDIUM); \
137 if (rs6000_current_cmodel != CMODEL_SMALL) \
139 TARGET_NO_FP_IN_TOC = 0; \
140 TARGET_NO_SUM_IN_TOC = 0; \
146 if (!RS6000_BI_ARCH_P) \
147 error (INVALID_32BIT, "32"); \
148 if (TARGET_PROFILE_KERNEL) \
150 TARGET_PROFILE_KERNEL = 0; \
151 error (INVALID_32BIT, "profile-kernel"); \
153 if (global_options_set.x_rs6000_current_cmodel) \
155 SET_CMODEL (CMODEL_SMALL); \
156 error (INVALID_32BIT, "cmodel"); \
162 #ifdef RS6000_BI_ARCH
164 #undef OPTION_TARGET_CPU_DEFAULT
165 #define OPTION_TARGET_CPU_DEFAULT \
166 (((TARGET_DEFAULT ^ target_flags) & MASK_64BIT) \
167 ? (char *) 0 : TARGET_CPU_DEFAULT)
171 #undef ASM_DEFAULT_SPEC
173 #undef LINK_OS_LINUX_SPEC
175 #ifndef RS6000_BI_ARCH
176 #define ASM_DEFAULT_SPEC "-mppc64"
177 #define ASM_SPEC "%(asm_spec64) %(asm_spec_common)"
178 #define LINK_OS_LINUX_SPEC "%(link_os_linux_spec64)"
181 #define ASM_DEFAULT_SPEC "-mppc%{!m32:64}"
182 #define ASM_SPEC "%{m32:%(asm_spec32)}%{!m32:%(asm_spec64)} %(asm_spec_common)"
183 #define LINK_OS_LINUX_SPEC "%{m32:%(link_os_linux_spec32)}%{!m32:%(link_os_linux_spec64)}"
185 #define ASM_DEFAULT_SPEC "-mppc%{m64:64}"
186 #define ASM_SPEC "%{!m64:%(asm_spec32)}%{m64:%(asm_spec64)} %(asm_spec_common)"
187 #define LINK_OS_LINUX_SPEC "%{!m64:%(link_os_linux_spec32)}%{m64:%(link_os_linux_spec64)}"
191 #define ASM_SPEC32 "-a32 \
192 %{mrelocatable} %{mrelocatable-lib} %{fpic:-K PIC} %{fPIC:-K PIC} \
193 %{memb} %{!memb: %{msdata=eabi: -memb}} \
194 %{!mlittle: %{!mlittle-endian: %{!mbig: %{!mbig-endian: \
195 %{mcall-freebsd: -mbig} \
196 %{mcall-i960-old: -mlittle} \
197 %{mcall-linux: -mbig} \
198 %{mcall-netbsd: -mbig} \
201 #define ASM_SPEC64 "-a64"
203 #define ASM_SPEC_COMMON "%(asm_cpu) \
204 %{,assembler|,assembler-with-cpp: %{mregnames} %{mno-regnames}} \
205 %{mlittle} %{mlittle-endian} %{mbig} %{mbig-endian}"
207 #undef SUBSUBTARGET_EXTRA_SPECS
208 #define SUBSUBTARGET_EXTRA_SPECS \
209 { "asm_spec_common", ASM_SPEC_COMMON }, \
210 { "asm_spec32", ASM_SPEC32 }, \
211 { "asm_spec64", ASM_SPEC64 }, \
212 { "link_os_linux_spec32", LINK_OS_LINUX_SPEC32 }, \
213 { "link_os_linux_spec64", LINK_OS_LINUX_SPEC64 },
215 #undef MULTILIB_DEFAULTS
217 #define MULTILIB_DEFAULTS { "m64" }
219 #define MULTILIB_DEFAULTS { "m32" }
222 #ifndef RS6000_BI_ARCH
224 /* 64-bit PowerPC Linux is always big-endian. */
225 #undef TARGET_LITTLE_ENDIAN
226 #define TARGET_LITTLE_ENDIAN 0
228 /* 64-bit PowerPC Linux always has a TOC. */
232 /* Some things from sysv4.h we don't do when 64 bit. */
233 #undef TARGET_RELOCATABLE
234 #define TARGET_RELOCATABLE 0
236 #define TARGET_EABI 0
237 #undef TARGET_PROTOTYPE
238 #define TARGET_PROTOTYPE 0
239 #undef RELOCATABLE_NEEDS_FIXUP
240 #define RELOCATABLE_NEEDS_FIXUP 0
244 /* We use glibc _mcount for profiling. */
245 #define NO_PROFILE_COUNTERS 1
246 #define PROFILE_HOOK(LABEL) \
247 do { if (TARGET_64BIT) output_profile_hook (LABEL); } while (0)
249 /* PowerPC64 Linux word-aligns FP doubles when -malign-power is given. */
250 #undef ADJUST_FIELD_ALIGN
251 #define ADJUST_FIELD_ALIGN(FIELD, COMPUTED) \
252 ((TARGET_ALTIVEC && TREE_CODE (TREE_TYPE (FIELD)) == VECTOR_TYPE) \
255 && TARGET_ALIGN_NATURAL == 0 \
256 && TYPE_MODE (strip_array_types (TREE_TYPE (FIELD))) == DFmode) \
257 ? MIN ((COMPUTED), 32) \
260 /* PowerPC64 Linux increases natural record alignment to doubleword if
261 the first field is an FP double, only if in power alignment mode. */
262 #undef ROUND_TYPE_ALIGN
263 #define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) \
265 && (TREE_CODE (STRUCT) == RECORD_TYPE \
266 || TREE_CODE (STRUCT) == UNION_TYPE \
267 || TREE_CODE (STRUCT) == QUAL_UNION_TYPE) \
268 && TARGET_ALIGN_NATURAL == 0) \
269 ? rs6000_special_round_type_align (STRUCT, COMPUTED, SPECIFIED) \
270 : MAX ((COMPUTED), (SPECIFIED)))
272 /* Use the default for compiling target libs. */
273 #ifdef IN_TARGET_LIBS
274 #undef TARGET_ALIGN_NATURAL
275 #define TARGET_ALIGN_NATURAL 1
278 /* Indicate that jump tables go in the text section. */
279 #undef JUMP_TABLES_IN_TEXT_SECTION
280 #define JUMP_TABLES_IN_TEXT_SECTION TARGET_64BIT
282 /* The linux ppc64 ABI isn't explicit on whether aggregates smaller
283 than a doubleword should be padded upward or downward. You could
284 reasonably assume that they follow the normal rules for structure
285 layout treating the parameter area as any other block of memory,
286 then map the reg param area to registers. i.e. pad upward.
287 Setting both of the following defines results in this behavior.
288 Setting just the first one will result in aggregates that fit in a
289 doubleword being padded downward, and others being padded upward.
290 Not a bad idea as this results in struct { int x; } being passed
291 the same way as an int. */
292 #define AGGREGATE_PADDING_FIXED TARGET_64BIT
293 #define AGGREGATES_PAD_UPWARD_ALWAYS 0
295 /* Specify padding for the last element of a block move between
296 registers and memory. FIRST is nonzero if this is the only
298 #define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \
299 (!(FIRST) ? upward : FUNCTION_ARG_PADDING (MODE, TYPE))
301 /* Linux doesn't support saving and restoring 64-bit regs in a 32-bit
303 #define OS_MISSING_POWERPC64 !TARGET_64BIT
306 #define OPTION_GLIBC (DEFAULT_LIBC == LIBC_GLIBC)
308 #define OPTION_GLIBC (linux_libc == LIBC_GLIBC)
311 /* glibc has float and long double forms of math functions. */
312 #undef TARGET_C99_FUNCTIONS
313 #define TARGET_C99_FUNCTIONS (OPTION_GLIBC)
315 /* Whether we have sincos that follows the GNU extension. */
316 #undef TARGET_HAS_SINCOS
317 #define TARGET_HAS_SINCOS (OPTION_GLIBC)
319 #undef TARGET_OS_CPP_BUILTINS
320 #define TARGET_OS_CPP_BUILTINS() \
325 builtin_define ("__PPC__"); \
326 builtin_define ("__PPC64__"); \
327 builtin_define ("__powerpc__"); \
328 builtin_define ("__powerpc64__"); \
329 builtin_assert ("cpu=powerpc64"); \
330 builtin_assert ("machine=powerpc64"); \
334 builtin_define_std ("PPC"); \
335 builtin_define_std ("powerpc"); \
336 builtin_assert ("cpu=powerpc"); \
337 builtin_assert ("machine=powerpc"); \
338 TARGET_OS_SYSV_CPP_BUILTINS (); \
343 #undef CPP_OS_DEFAULT_SPEC
344 #define CPP_OS_DEFAULT_SPEC "%(cpp_os_linux)"
346 /* The GNU C++ standard library currently requires _GNU_SOURCE being
347 defined on glibc-based systems. This temporary hack accomplishes this,
348 it should go away as soon as libstdc++-v3 has a real fix. */
349 #undef CPLUSPLUS_CPP_SPEC
350 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
352 #undef LINK_SHLIB_SPEC
353 #define LINK_SHLIB_SPEC "%{shared:-shared} %{!shared: %{static:-static}}"
355 #undef LIB_DEFAULT_SPEC
356 #define LIB_DEFAULT_SPEC "%(lib_linux)"
358 #undef STARTFILE_DEFAULT_SPEC
359 #define STARTFILE_DEFAULT_SPEC "%(startfile_linux)"
361 #undef ENDFILE_DEFAULT_SPEC
362 #define ENDFILE_DEFAULT_SPEC "%(endfile_linux)"
364 #undef LINK_START_DEFAULT_SPEC
365 #define LINK_START_DEFAULT_SPEC "%(link_start_linux)"
367 #undef LINK_OS_DEFAULT_SPEC
368 #define LINK_OS_DEFAULT_SPEC "%(link_os_linux)"
370 #define GLIBC_DYNAMIC_LINKER32 "/lib/ld.so.1"
371 #define GLIBC_DYNAMIC_LINKER64 "/lib64/ld64.so.1"
372 #define UCLIBC_DYNAMIC_LINKER32 "/lib/ld-uClibc.so.0"
373 #define UCLIBC_DYNAMIC_LINKER64 "/lib/ld64-uClibc.so.0"
374 #if DEFAULT_LIBC == LIBC_UCLIBC
375 #define CHOOSE_DYNAMIC_LINKER(G, U) "%{mglibc:" G ";:" U "}"
376 #elif DEFAULT_LIBC == LIBC_GLIBC
377 #define CHOOSE_DYNAMIC_LINKER(G, U) "%{muclibc:" U ";:" G "}"
379 #error "Unsupported DEFAULT_LIBC"
381 #define GNU_USER_DYNAMIC_LINKER32 \
382 CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32)
383 #define GNU_USER_DYNAMIC_LINKER64 \
384 CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64)
387 #define LINK_OS_LINUX_SPEC32 "-m elf32ppclinux %{!shared: %{!static: \
388 %{rdynamic:-export-dynamic} \
389 -dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "}}"
391 #define LINK_OS_LINUX_SPEC64 "-m elf64ppc %{!shared: %{!static: \
392 %{rdynamic:-export-dynamic} \
393 -dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "}}"
395 #undef TOC_SECTION_ASM_OP
396 #define TOC_SECTION_ASM_OP \
398 ? "\t.section\t\".toc\",\"aw\"" \
399 : "\t.section\t\".got\",\"aw\"")
401 #undef MINIMAL_TOC_SECTION_ASM_OP
402 #define MINIMAL_TOC_SECTION_ASM_OP \
404 ? "\t.section\t\".toc1\",\"aw\"" \
405 : ((TARGET_RELOCATABLE || flag_pic) \
406 ? "\t.section\t\".got2\",\"aw\"" \
407 : "\t.section\t\".got1\",\"aw\""))
409 /* Must be at least as big as our pointer type. */
411 #define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int")
414 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
417 #define WCHAR_TYPE (TARGET_64BIT ? "int" : "long int")
418 #undef WCHAR_TYPE_SIZE
419 #define WCHAR_TYPE_SIZE 32
421 /* Override rs6000.h definition. */
423 #define ASM_APP_ON "#APP\n"
425 /* Override rs6000.h definition. */
427 #define ASM_APP_OFF "#NO_APP\n"
429 /* PowerPC no-op instruction. */
430 #undef RS6000_CALL_GLUE
431 #define RS6000_CALL_GLUE (TARGET_64BIT ? "nop" : "cror 31,31,31")
434 #define RS6000_MCOUNT "_mcount"
437 /* _init and _fini functions are built from bits spread across many
438 object files, each potentially with a different TOC pointer. For
439 that reason, place a nop after the call so that the linker can
440 restore the TOC pointer if a TOC adjusting call stub is needed. */
442 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
443 asm (SECTION_OP "\n" \
448 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
449 asm (SECTION_OP "\n" \
456 /* FP save and restore routines. */
457 #undef SAVE_FP_PREFIX
458 #define SAVE_FP_PREFIX (TARGET_64BIT ? "._savef" : "_savefpr_")
459 #undef SAVE_FP_SUFFIX
460 #define SAVE_FP_SUFFIX ""
461 #undef RESTORE_FP_PREFIX
462 #define RESTORE_FP_PREFIX (TARGET_64BIT ? "._restf" : "_restfpr_")
463 #undef RESTORE_FP_SUFFIX
464 #define RESTORE_FP_SUFFIX ""
466 /* Dwarf2 debugging. */
467 #undef PREFERRED_DEBUGGING_TYPE
468 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
470 /* This is how to declare the size of a function. */
471 #undef ASM_DECLARE_FUNCTION_SIZE
472 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
475 if (!flag_inhibit_size_directive) \
477 fputs ("\t.size\t", (FILE)); \
478 if (TARGET_64BIT && DOT_SYMBOLS) \
479 putc ('.', (FILE)); \
480 assemble_name ((FILE), (FNAME)); \
481 fputs (",.-", (FILE)); \
482 rs6000_output_function_entry (FILE, FNAME); \
483 putc ('\n', (FILE)); \
488 /* Return nonzero if this entry is to be written into the constant
489 pool in a special way. We do so if this is a SYMBOL_REF, LABEL_REF
490 or a CONST containing one of them. If -mfp-in-toc (the default),
491 we also do this for floating-point constants. We actually can only
492 do this if the FP formats of the target and host machines are the
493 same, but we can't check that since not every file that uses
494 the macros includes real.h. We also do this when we can write the
495 entry into the TOC and the entry is not larger than a TOC entry. */
497 #undef ASM_OUTPUT_SPECIAL_POOL_ENTRY_P
498 #define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) \
500 && (GET_CODE (X) == SYMBOL_REF \
501 || (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS \
502 && GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF) \
503 || GET_CODE (X) == LABEL_REF \
504 || (GET_CODE (X) == CONST_INT \
505 && GET_MODE_BITSIZE (MODE) <= GET_MODE_BITSIZE (Pmode)) \
506 || (GET_CODE (X) == CONST_DOUBLE \
508 && (TARGET_MINIMAL_TOC \
509 || (SCALAR_FLOAT_MODE_P (GET_MODE (X)) \
510 && ! TARGET_NO_FP_IN_TOC))) \
512 && !TARGET_NO_FP_IN_TOC \
513 && !TARGET_RELOCATABLE \
514 && SCALAR_FLOAT_MODE_P (GET_MODE (X)) \
515 && BITS_PER_WORD == HOST_BITS_PER_INT)))))
517 /* Select a format to encode pointers in exception handling data. CODE
518 is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is
519 true if the symbol may be affected by dynamic relocations. */
520 #undef ASM_PREFERRED_EH_DATA_FORMAT
521 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
522 ((TARGET_64BIT || flag_pic || TARGET_RELOCATABLE) \
523 ? (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel \
524 | (TARGET_64BIT ? DW_EH_PE_udata8 : DW_EH_PE_sdata4)) \
527 /* For backward compatibility, we must continue to use the AIX
528 structure return convention. */
529 #undef DRAFT_V4_STRUCT_RET
530 #define DRAFT_V4_STRUCT_RET (!TARGET_64BIT)
532 #define TARGET_POSIX_IO
534 #define LINK_GCC_C_SEQUENCE_SPEC \
535 "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
537 /* Use --as-needed -lgcc_s for eh support. */
538 #ifdef HAVE_LD_AS_NEEDED
539 #define USE_LD_AS_NEEDED 1
542 #ifdef TARGET_LIBC_PROVIDES_SSP
543 /* ppc32 glibc provides __stack_chk_guard in -0x7008(2),
544 ppc64 glibc provides it at -0x7010(13). */
545 #define TARGET_THREAD_SSP_OFFSET (TARGET_64BIT ? -0x7010 : -0x7008)
548 #define POWERPC_LINUX
550 /* ppc{32,64} linux has 128-bit long double support in glibc 2.4 and later. */
551 #ifdef TARGET_DEFAULT_LONG_DOUBLE_128
552 #define RS6000_DEFAULT_LONG_DOUBLE_SIZE 128
555 /* Static stack checking is supported by means of probes. */
556 #define STACK_CHECK_STATIC_BUILTIN 1
558 /* The default value isn't sufficient in 64-bit mode. */
559 #define STACK_CHECK_PROTECT (TARGET_64BIT ? 16 * 1024 : 12 * 1024)