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 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_POWER6
77 #undef PROCESSOR_DEFAULT64
78 #define PROCESSOR_DEFAULT64 PROCESSOR_POWER6
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 (!rs6000_explicit_options.alignment) \
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 (rs6000_explicit_options.cmodel \
129 && rs6000_current_cmodel != CMODEL_SMALL) \
130 error ("-mcmodel incompatible with other toc options"); \
131 SET_CMODEL (CMODEL_SMALL); \
135 if (!rs6000_explicit_options.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 (rs6000_explicit_options.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 /* FIXME: This will quite possibly choose the wrong dynamic linker. */
176 #undef LINK_OS_GNU_SPEC
177 #define LINK_OS_GNU_SPEC LINK_OS_LINUX_SPEC
179 #ifndef RS6000_BI_ARCH
180 #define ASM_DEFAULT_SPEC "-mppc64"
181 #define ASM_SPEC "%(asm_spec64) %(asm_spec_common)"
182 #define LINK_OS_LINUX_SPEC "%(link_os_linux_spec64)"
185 #define ASM_DEFAULT_SPEC "-mppc%{!m32:64}"
186 #define ASM_SPEC "%{m32:%(asm_spec32)}%{!m32:%(asm_spec64)} %(asm_spec_common)"
187 #define LINK_OS_LINUX_SPEC "%{m32:%(link_os_linux_spec32)}%{!m32:%(link_os_linux_spec64)}"
189 #define ASM_DEFAULT_SPEC "-mppc%{m64:64}"
190 #define ASM_SPEC "%{!m64:%(asm_spec32)}%{m64:%(asm_spec64)} %(asm_spec_common)"
191 #define LINK_OS_LINUX_SPEC "%{!m64:%(link_os_linux_spec32)}%{m64:%(link_os_linux_spec64)}"
195 #define ASM_SPEC32 "-a32 %{Ym,*} %{Yd,*} \
196 %{mrelocatable} %{mrelocatable-lib} %{fpic:-K PIC} %{fPIC:-K PIC} \
197 %{memb} %{!memb: %{msdata=eabi: -memb}} \
198 %{!mlittle: %{!mlittle-endian: %{!mbig: %{!mbig-endian: \
199 %{mcall-freebsd: -mbig} \
200 %{mcall-i960-old: -mlittle} \
201 %{mcall-linux: -mbig} \
202 %{mcall-gnu: -mbig} \
203 %{mcall-netbsd: -mbig} \
206 #define ASM_SPEC64 "-a64"
208 #define ASM_SPEC_COMMON "%(asm_cpu) \
209 %{,assembler|,assembler-with-cpp: %{mregnames} %{mno-regnames}} \
211 %{mlittle} %{mlittle-endian} %{mbig} %{mbig-endian}"
213 #undef SUBSUBTARGET_EXTRA_SPECS
214 #define SUBSUBTARGET_EXTRA_SPECS \
215 { "asm_spec_common", ASM_SPEC_COMMON }, \
216 { "asm_spec32", ASM_SPEC32 }, \
217 { "asm_spec64", ASM_SPEC64 }, \
218 { "link_os_linux_spec32", LINK_OS_LINUX_SPEC32 }, \
219 { "link_os_linux_spec64", LINK_OS_LINUX_SPEC64 },
221 #undef MULTILIB_DEFAULTS
223 #define MULTILIB_DEFAULTS { "m64" }
225 #define MULTILIB_DEFAULTS { "m32" }
228 #ifndef RS6000_BI_ARCH
230 /* 64-bit PowerPC Linux is always big-endian. */
231 #undef TARGET_LITTLE_ENDIAN
232 #define TARGET_LITTLE_ENDIAN 0
234 /* 64-bit PowerPC Linux always has a TOC. */
238 /* Some things from sysv4.h we don't do when 64 bit. */
239 #undef TARGET_RELOCATABLE
240 #define TARGET_RELOCATABLE 0
242 #define TARGET_EABI 0
243 #undef TARGET_PROTOTYPE
244 #define TARGET_PROTOTYPE 0
245 #undef RELOCATABLE_NEEDS_FIXUP
246 #define RELOCATABLE_NEEDS_FIXUP 0
250 /* We use glibc _mcount for profiling. */
251 #define NO_PROFILE_COUNTERS 1
252 #define PROFILE_HOOK(LABEL) \
253 do { if (TARGET_64BIT) output_profile_hook (LABEL); } while (0)
255 /* PowerPC64 Linux word-aligns FP doubles when -malign-power is given. */
256 #undef ADJUST_FIELD_ALIGN
257 #define ADJUST_FIELD_ALIGN(FIELD, COMPUTED) \
258 ((TARGET_ALTIVEC && TREE_CODE (TREE_TYPE (FIELD)) == VECTOR_TYPE) \
261 && TARGET_ALIGN_NATURAL == 0 \
262 && TYPE_MODE (strip_array_types (TREE_TYPE (FIELD))) == DFmode) \
263 ? MIN ((COMPUTED), 32) \
266 /* PowerPC64 Linux increases natural record alignment to doubleword if
267 the first field is an FP double, only if in power alignment mode. */
268 #undef ROUND_TYPE_ALIGN
269 #define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) \
271 && (TREE_CODE (STRUCT) == RECORD_TYPE \
272 || TREE_CODE (STRUCT) == UNION_TYPE \
273 || TREE_CODE (STRUCT) == QUAL_UNION_TYPE) \
274 && TARGET_ALIGN_NATURAL == 0) \
275 ? rs6000_special_round_type_align (STRUCT, COMPUTED, SPECIFIED) \
276 : MAX ((COMPUTED), (SPECIFIED)))
278 /* Use the default for compiling target libs. */
279 #ifdef IN_TARGET_LIBS
280 #undef TARGET_ALIGN_NATURAL
281 #define TARGET_ALIGN_NATURAL 1
284 /* Indicate that jump tables go in the text section. */
285 #undef JUMP_TABLES_IN_TEXT_SECTION
286 #define JUMP_TABLES_IN_TEXT_SECTION TARGET_64BIT
288 /* The linux ppc64 ABI isn't explicit on whether aggregates smaller
289 than a doubleword should be padded upward or downward. You could
290 reasonably assume that they follow the normal rules for structure
291 layout treating the parameter area as any other block of memory,
292 then map the reg param area to registers. i.e. pad upward.
293 Setting both of the following defines results in this behavior.
294 Setting just the first one will result in aggregates that fit in a
295 doubleword being padded downward, and others being padded upward.
296 Not a bad idea as this results in struct { int x; } being passed
297 the same way as an int. */
298 #define AGGREGATE_PADDING_FIXED TARGET_64BIT
299 #define AGGREGATES_PAD_UPWARD_ALWAYS 0
301 /* Specify padding for the last element of a block move between
302 registers and memory. FIRST is nonzero if this is the only
304 #define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \
305 (!(FIRST) ? upward : FUNCTION_ARG_PADDING (MODE, TYPE))
307 /* Linux doesn't support saving and restoring 64-bit regs in a 32-bit
309 #define OS_MISSING_POWERPC64 !TARGET_64BIT
312 #define OPTION_GLIBC (DEFAULT_LIBC == LIBC_GLIBC)
314 #define OPTION_GLIBC (linux_libc == LIBC_GLIBC)
317 /* glibc has float and long double forms of math functions. */
318 #undef TARGET_C99_FUNCTIONS
319 #define TARGET_C99_FUNCTIONS (OPTION_GLIBC)
321 /* Whether we have sincos that follows the GNU extension. */
322 #undef TARGET_HAS_SINCOS
323 #define TARGET_HAS_SINCOS (OPTION_GLIBC)
325 #undef TARGET_OS_CPP_BUILTINS
326 #define TARGET_OS_CPP_BUILTINS() \
331 builtin_define ("__PPC__"); \
332 builtin_define ("__PPC64__"); \
333 builtin_define ("__powerpc__"); \
334 builtin_define ("__powerpc64__"); \
335 builtin_assert ("cpu=powerpc64"); \
336 builtin_assert ("machine=powerpc64"); \
340 builtin_define_std ("PPC"); \
341 builtin_define_std ("powerpc"); \
342 builtin_assert ("cpu=powerpc"); \
343 builtin_assert ("machine=powerpc"); \
344 TARGET_OS_SYSV_CPP_BUILTINS (); \
349 #undef CPP_OS_DEFAULT_SPEC
350 #define CPP_OS_DEFAULT_SPEC "%(cpp_os_linux)"
352 /* The GNU C++ standard library currently requires _GNU_SOURCE being
353 defined on glibc-based systems. This temporary hack accomplishes this,
354 it should go away as soon as libstdc++-v3 has a real fix. */
355 #undef CPLUSPLUS_CPP_SPEC
356 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
358 #undef LINK_SHLIB_SPEC
359 #define LINK_SHLIB_SPEC "%{shared:-shared} %{!shared: %{static:-static}}"
361 #undef LIB_DEFAULT_SPEC
362 #define LIB_DEFAULT_SPEC "%(lib_linux)"
364 #undef STARTFILE_DEFAULT_SPEC
365 #define STARTFILE_DEFAULT_SPEC "%(startfile_linux)"
367 #undef ENDFILE_DEFAULT_SPEC
368 #define ENDFILE_DEFAULT_SPEC "%(endfile_linux)"
370 #undef LINK_START_DEFAULT_SPEC
371 #define LINK_START_DEFAULT_SPEC "%(link_start_linux)"
373 #undef LINK_OS_DEFAULT_SPEC
374 #define LINK_OS_DEFAULT_SPEC "%(link_os_linux)"
376 #define GLIBC_DYNAMIC_LINKER32 "/lib/ld.so.1"
377 #define GLIBC_DYNAMIC_LINKER64 "/lib64/ld64.so.1"
378 #define UCLIBC_DYNAMIC_LINKER32 "/lib/ld-uClibc.so.0"
379 #define UCLIBC_DYNAMIC_LINKER64 "/lib/ld64-uClibc.so.0"
380 #if DEFAULT_LIBC == LIBC_UCLIBC
381 #define CHOOSE_DYNAMIC_LINKER(G, U) "%{mglibc:" G ";:" U "}"
382 #elif DEFAULT_LIBC == LIBC_GLIBC
383 #define CHOOSE_DYNAMIC_LINKER(G, U) "%{muclibc:" U ";:" G "}"
385 #error "Unsupported DEFAULT_LIBC"
387 #define LINUX_DYNAMIC_LINKER32 \
388 CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32)
389 #define LINUX_DYNAMIC_LINKER64 \
390 CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64)
393 #define LINK_OS_LINUX_SPEC32 "-m elf32ppclinux %{!shared: %{!static: \
394 %{rdynamic:-export-dynamic} \
395 -dynamic-linker " LINUX_DYNAMIC_LINKER32 "}}"
397 #define LINK_OS_LINUX_SPEC64 "-m elf64ppc %{!shared: %{!static: \
398 %{rdynamic:-export-dynamic} \
399 -dynamic-linker " LINUX_DYNAMIC_LINKER64 "}}"
401 #undef TOC_SECTION_ASM_OP
402 #define TOC_SECTION_ASM_OP \
404 ? "\t.section\t\".toc\",\"aw\"" \
405 : "\t.section\t\".got\",\"aw\"")
407 #undef MINIMAL_TOC_SECTION_ASM_OP
408 #define MINIMAL_TOC_SECTION_ASM_OP \
410 ? "\t.section\t\".toc1\",\"aw\"" \
411 : ((TARGET_RELOCATABLE || flag_pic) \
412 ? "\t.section\t\".got2\",\"aw\"" \
413 : "\t.section\t\".got1\",\"aw\""))
415 #undef TARGET_VERSION
416 #define TARGET_VERSION fprintf (stderr, " (PowerPC64 GNU/Linux)");
418 /* Must be at least as big as our pointer type. */
420 #define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int")
423 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
426 #define WCHAR_TYPE (TARGET_64BIT ? "int" : "long int")
427 #undef WCHAR_TYPE_SIZE
428 #define WCHAR_TYPE_SIZE 32
430 /* Override rs6000.h definition. */
432 #define ASM_APP_ON "#APP\n"
434 /* Override rs6000.h definition. */
436 #define ASM_APP_OFF "#NO_APP\n"
438 /* PowerPC no-op instruction. */
439 #undef RS6000_CALL_GLUE
440 #define RS6000_CALL_GLUE (TARGET_64BIT ? "nop" : "cror 31,31,31")
443 #define RS6000_MCOUNT "_mcount"
446 /* _init and _fini functions are built from bits spread across many
447 object files, each potentially with a different TOC pointer. For
448 that reason, place a nop after the call so that the linker can
449 restore the TOC pointer if a TOC adjusting call stub is needed. */
451 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
452 asm (SECTION_OP "\n" \
457 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
458 asm (SECTION_OP "\n" \
465 /* FP save and restore routines. */
466 #undef SAVE_FP_PREFIX
467 #define SAVE_FP_PREFIX (TARGET_64BIT ? "._savef" : "_savefpr_")
468 #undef SAVE_FP_SUFFIX
469 #define SAVE_FP_SUFFIX ""
470 #undef RESTORE_FP_PREFIX
471 #define RESTORE_FP_PREFIX (TARGET_64BIT ? "._restf" : "_restfpr_")
472 #undef RESTORE_FP_SUFFIX
473 #define RESTORE_FP_SUFFIX ""
475 /* Dwarf2 debugging. */
476 #undef PREFERRED_DEBUGGING_TYPE
477 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
479 /* This is how to declare the size of a function. */
480 #undef ASM_DECLARE_FUNCTION_SIZE
481 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
484 if (!flag_inhibit_size_directive) \
486 fputs ("\t.size\t", (FILE)); \
487 if (TARGET_64BIT && DOT_SYMBOLS) \
488 putc ('.', (FILE)); \
489 assemble_name ((FILE), (FNAME)); \
490 fputs (",.-", (FILE)); \
491 rs6000_output_function_entry (FILE, FNAME); \
492 putc ('\n', (FILE)); \
497 /* Return nonzero if this entry is to be written into the constant
498 pool in a special way. We do so if this is a SYMBOL_REF, LABEL_REF
499 or a CONST containing one of them. If -mfp-in-toc (the default),
500 we also do this for floating-point constants. We actually can only
501 do this if the FP formats of the target and host machines are the
502 same, but we can't check that since not every file that uses
503 the macros includes real.h. We also do this when we can write the
504 entry into the TOC and the entry is not larger than a TOC entry. */
506 #undef ASM_OUTPUT_SPECIAL_POOL_ENTRY_P
507 #define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) \
509 && (GET_CODE (X) == SYMBOL_REF \
510 || (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS \
511 && GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF) \
512 || GET_CODE (X) == LABEL_REF \
513 || (GET_CODE (X) == CONST_INT \
514 && GET_MODE_BITSIZE (MODE) <= GET_MODE_BITSIZE (Pmode)) \
515 || (GET_CODE (X) == CONST_DOUBLE \
517 && (TARGET_MINIMAL_TOC \
518 || (SCALAR_FLOAT_MODE_P (GET_MODE (X)) \
519 && ! TARGET_NO_FP_IN_TOC))) \
521 && !TARGET_NO_FP_IN_TOC \
522 && !TARGET_RELOCATABLE \
523 && SCALAR_FLOAT_MODE_P (GET_MODE (X)) \
524 && BITS_PER_WORD == HOST_BITS_PER_INT)))))
526 /* Select a format to encode pointers in exception handling data. CODE
527 is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is
528 true if the symbol may be affected by dynamic relocations. */
529 #undef ASM_PREFERRED_EH_DATA_FORMAT
530 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
531 ((TARGET_64BIT || flag_pic || TARGET_RELOCATABLE) \
532 ? (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel \
533 | (TARGET_64BIT ? DW_EH_PE_udata8 : DW_EH_PE_sdata4)) \
536 /* For backward compatibility, we must continue to use the AIX
537 structure return convention. */
538 #undef DRAFT_V4_STRUCT_RET
539 #define DRAFT_V4_STRUCT_RET (!TARGET_64BIT)
541 #define TARGET_ASM_FILE_END rs6000_elf_end_indicate_exec_stack
543 #define TARGET_POSIX_IO
545 #define LINK_GCC_C_SEQUENCE_SPEC \
546 "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
548 /* Use --as-needed -lgcc_s for eh support. */
549 #ifdef HAVE_LD_AS_NEEDED
550 #define USE_LD_AS_NEEDED 1
553 #define MD_UNWIND_SUPPORT "config/rs6000/linux-unwind.h"
555 #ifdef TARGET_LIBC_PROVIDES_SSP
556 /* ppc32 glibc provides __stack_chk_guard in -0x7008(2),
557 ppc64 glibc provides it at -0x7010(13). */
558 #define TARGET_THREAD_SSP_OFFSET (TARGET_64BIT ? -0x7010 : -0x7008)
561 #define POWERPC_LINUX
563 /* ppc{32,64} linux has 128-bit long double support in glibc 2.4 and later. */
564 #ifdef TARGET_DEFAULT_LONG_DOUBLE_128
565 #define RS6000_DEFAULT_LONG_DOUBLE_SIZE 128
568 /* Static stack checking is supported by means of probes. */
569 #define STACK_CHECK_STATIC_BUILTIN 1
571 /* The default value isn't sufficient in 64-bit mode. */
572 #define STACK_CHECK_PROTECT (TARGET_64BIT ? 16 * 1024 : 12 * 1024)