68a9955a4fdd72788da438f0261f357156641ff0
1 /* Definitions of target machine for GNU compiler,
2 for 64 bit PowerPC linux.
3 Copyright (C) 2000, 2001, 2002, 2003, 2004
4 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 2, 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 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to the
20 Free Software Foundation, 59 Temple Place - Suite 330, Boston,
21 MA 02111-1307, USA. */
23 #ifndef RS6000_BI_ARCH
26 #define DEFAULT_ABI ABI_AIX
29 #define TARGET_64BIT 1
31 #define DEFAULT_ARCH64_P 1
32 #define RS6000_BI_ARCH_P 0
36 #define DEFAULT_ARCH64_P (TARGET_DEFAULT & MASK_64BIT)
37 #define RS6000_BI_ARCH_P 1
44 #define TARGET_64BIT 1
46 #define TARGET_64BIT 0
51 #define TARGET_AIX TARGET_64BIT
53 #ifdef HAVE_LD_NO_DOT_SYMS
54 /* New ABI uses a local sym for the function entry point. */
55 extern int dot_symbols
;
57 #define DOT_SYMBOLS dot_symbols
60 #undef PROCESSOR_DEFAULT64
61 #define PROCESSOR_DEFAULT64 PROCESSOR_PPC630
63 #undef TARGET_RELOCATABLE
64 #define TARGET_RELOCATABLE (!TARGET_64BIT && (target_flags & MASK_RELOCATABLE))
66 #undef RS6000_ABI_NAME
67 #define RS6000_ABI_NAME "linux"
69 #define INVALID_64BIT "-m%s not supported in this configuration"
70 #define INVALID_32BIT INVALID_64BIT
72 #undef SUBSUBTARGET_OVERRIDE_OPTIONS
73 #define SUBSUBTARGET_OVERRIDE_OPTIONS \
76 if (rs6000_alignment_string == 0) \
77 rs6000_alignment_flags = MASK_ALIGN_NATURAL; \
80 if (DEFAULT_ABI != ABI_AIX) \
82 rs6000_current_abi = ABI_AIX; \
83 error (INVALID_64BIT, "call"); \
85 dot_symbols = !strcmp (rs6000_abi_name, "aixdesc"); \
86 if (target_flags & MASK_RELOCATABLE) \
88 target_flags &= ~MASK_RELOCATABLE; \
89 error (INVALID_64BIT, "relocatable"); \
91 if (target_flags & MASK_EABI) \
93 target_flags &= ~MASK_EABI; \
94 error (INVALID_64BIT, "eabi"); \
96 if (target_flags & MASK_PROTOTYPE) \
98 target_flags &= ~MASK_PROTOTYPE; \
99 error (INVALID_64BIT, "prototype"); \
101 if ((target_flags & MASK_POWERPC64) == 0) \
103 target_flags |= MASK_POWERPC64; \
104 error ("-m64 requires a PowerPC64 cpu"); \
109 if (!RS6000_BI_ARCH_P) \
110 error (INVALID_32BIT, "32"); \
111 if (TARGET_PROFILE_KERNEL) \
113 target_flags &= ~MASK_PROFILE_KERNEL; \
114 error (INVALID_32BIT, "profile-kernel"); \
120 #ifdef RS6000_BI_ARCH
122 #undef OVERRIDE_OPTIONS
123 #define OVERRIDE_OPTIONS \
124 rs6000_override_options (((TARGET_DEFAULT ^ target_flags) & MASK_64BIT) \
125 ? (char *) 0 : TARGET_CPU_DEFAULT)
129 #undef ASM_DEFAULT_SPEC
131 #undef LINK_OS_LINUX_SPEC
133 #ifndef RS6000_BI_ARCH
134 #define ASM_DEFAULT_SPEC "-mppc64"
135 #define ASM_SPEC "%(asm_spec64) %(asm_spec_common)"
136 #define LINK_OS_LINUX_SPEC "%(link_os_linux_spec64)"
139 #define ASM_DEFAULT_SPEC "-mppc%{!m32:64}"
140 #define ASM_SPEC "%{m32:%(asm_spec32)}%{!m32:%(asm_spec64)} %(asm_spec_common)"
141 #define LINK_OS_LINUX_SPEC "%{m32:%(link_os_linux_spec32)}%{!m32:%(link_os_linux_spec64)}"
143 #define ASM_DEFAULT_SPEC "-mppc%{m64:64}"
144 #define ASM_SPEC "%{!m64:%(asm_spec32)}%{m64:%(asm_spec64)} %(asm_spec_common)"
145 #define LINK_OS_LINUX_SPEC "%{!m64:%(link_os_linux_spec32)}%{m64:%(link_os_linux_spec64)}"
149 #define ASM_SPEC32 "-a32 %{n} %{T} %{Ym,*} %{Yd,*} \
150 %{mrelocatable} %{mrelocatable-lib} %{fpic:-K PIC} %{fPIC:-K PIC} \
151 %{memb} %{!memb: %{msdata: -memb} %{msdata=eabi: -memb}} \
152 %{!mlittle: %{!mlittle-endian: %{!mbig: %{!mbig-endian: \
153 %{mcall-freebsd: -mbig} \
154 %{mcall-i960-old: -mlittle} \
155 %{mcall-linux: -mbig} \
156 %{mcall-gnu: -mbig} \
157 %{mcall-netbsd: -mbig} \
160 #define ASM_SPEC64 "-a64"
162 #define ASM_SPEC_COMMON "%(asm_cpu) \
163 %{.s: %{mregnames} %{mno-regnames}} %{.S: %{mregnames} %{mno-regnames}} \
164 %{v:-V} %{Qy:} %{!Qn:-Qy} %{Wa,*:%*} \
165 %{mlittle} %{mlittle-endian} %{mbig} %{mbig-endian}"
167 #undef SUBSUBTARGET_EXTRA_SPECS
168 #define SUBSUBTARGET_EXTRA_SPECS \
169 { "asm_spec_common", ASM_SPEC_COMMON }, \
170 { "asm_spec32", ASM_SPEC32 }, \
171 { "asm_spec64", ASM_SPEC64 }, \
172 { "link_os_linux_spec32", LINK_OS_LINUX_SPEC32 }, \
173 { "link_os_linux_spec64", LINK_OS_LINUX_SPEC64 },
175 #undef MULTILIB_DEFAULTS
177 #define MULTILIB_DEFAULTS { "m64" }
179 #define MULTILIB_DEFAULTS { "m32" }
182 #ifndef RS6000_BI_ARCH
184 /* 64-bit PowerPC Linux is always big-endian. */
185 #undef TARGET_LITTLE_ENDIAN
186 #define TARGET_LITTLE_ENDIAN 0
188 /* 64-bit PowerPC Linux always has a TOC. */
192 /* Some things from sysv4.h we don't do when 64 bit. */
193 #undef TARGET_RELOCATABLE
194 #define TARGET_RELOCATABLE 0
196 #define TARGET_EABI 0
197 #undef TARGET_PROTOTYPE
198 #define TARGET_PROTOTYPE 0
202 #define MASK_PROFILE_KERNEL 0x00100000
204 /* Non-standard profiling for kernels, which just saves LR then calls
205 _mcount without worrying about arg saves. The idea is to change
206 the function prologue as little as possible as it isn't easy to
207 account for arg save/restore code added just for _mcount. */
208 #define TARGET_PROFILE_KERNEL (target_flags & MASK_PROFILE_KERNEL)
210 /* Override sysv4.h. */
211 #undef EXTRA_SUBTARGET_SWITCHES
212 #define EXTRA_SUBTARGET_SWITCHES \
213 {"profile-kernel", MASK_PROFILE_KERNEL, \
214 N_("Call mcount for profiling before a function prologue") }, \
215 {"no-profile-kernel", -MASK_PROFILE_KERNEL, \
216 N_("Call mcount for profiling after a function prologue") },
218 /* We use glibc _mcount for profiling. */
219 #define NO_PROFILE_COUNTERS TARGET_64BIT
220 #define PROFILE_HOOK(LABEL) \
221 do { if (TARGET_64BIT) output_profile_hook (LABEL); } while (0)
223 /* We don't need to generate entries in .fixup. */
224 #undef RELOCATABLE_NEEDS_FIXUP
226 /* PowerPC64 Linux word-aligns FP doubles when -malign-power is given. */
227 #undef ADJUST_FIELD_ALIGN
228 #define ADJUST_FIELD_ALIGN(FIELD, COMPUTED) \
229 ((TARGET_ALTIVEC && TREE_CODE (TREE_TYPE (FIELD)) == VECTOR_TYPE) \
232 && TARGET_ALIGN_NATURAL == 0 \
233 && TYPE_MODE (TREE_CODE (TREE_TYPE (FIELD)) == ARRAY_TYPE \
234 ? get_inner_array_type (FIELD) \
235 : TREE_TYPE (FIELD)) == DFmode) \
236 ? MIN ((COMPUTED), 32) \
239 /* PowerPC64 Linux increases natural record alignment to doubleword if
240 the first field is an FP double, only if in power alignment mode. */
241 #undef ROUND_TYPE_ALIGN
242 #define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) \
243 ((TARGET_ALTIVEC && TREE_CODE (STRUCT) == VECTOR_TYPE) \
244 ? MAX (MAX ((COMPUTED), (SPECIFIED)), 128) \
246 && (TREE_CODE (STRUCT) == RECORD_TYPE \
247 || TREE_CODE (STRUCT) == UNION_TYPE \
248 || TREE_CODE (STRUCT) == QUAL_UNION_TYPE) \
249 && TARGET_ALIGN_NATURAL == 0) \
250 ? rs6000_special_round_type_align (STRUCT, COMPUTED, SPECIFIED) \
251 : MAX ((COMPUTED), (SPECIFIED)))
253 /* Indicate that jump tables go in the text section. */
254 #undef JUMP_TABLES_IN_TEXT_SECTION
255 #define JUMP_TABLES_IN_TEXT_SECTION TARGET_64BIT
257 /* The linux ppc64 ABI isn't explicit on whether aggregates smaller
258 than a doubleword should be padded upward or downward. You could
259 reasonably assume that they follow the normal rules for structure
260 layout treating the parameter area as any other block of memory,
261 then map the reg param area to registers. i.e. pad upward.
262 Setting both of the following defines results in this behavior.
263 Setting just the first one will result in aggregates that fit in a
264 doubleword being padded downward, and others being padded upward.
265 Not a bad idea as this results in struct { int x; } being passed
266 the same way as an int. */
267 #define AGGREGATE_PADDING_FIXED TARGET_64BIT
268 #define AGGREGATES_PAD_UPWARD_ALWAYS 0
270 /* Specify padding for the last element of a block move between
271 registers and memory. FIRST is nonzero if this is the only
273 #define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \
274 (!(FIRST) ? upward : FUNCTION_ARG_PADDING (MODE, TYPE))
276 /* __throw will restore its own return address to be the same as the
277 return address of the function that the throw is being made to.
278 This is unfortunate, because we want to check the original
279 return address to see if we need to restore the TOC.
280 So we have to squirrel it away with this. */
281 #define SETUP_FRAME_ADDRESSES() \
282 do { if (TARGET_64BIT) rs6000_aix_emit_builtin_unwind_init (); } while (0)
284 /* Override svr4.h */
285 #undef MD_EXEC_PREFIX
286 #undef MD_STARTFILE_PREFIX
288 #undef TARGET_OS_CPP_BUILTINS
289 #define TARGET_OS_CPP_BUILTINS() \
294 builtin_define ("__PPC__"); \
295 builtin_define ("__PPC64__"); \
296 builtin_define ("__powerpc__"); \
297 builtin_define ("__powerpc64__"); \
298 builtin_define ("__PIC__"); \
299 builtin_assert ("cpu=powerpc64"); \
300 builtin_assert ("machine=powerpc64"); \
304 builtin_define_std ("PPC"); \
305 builtin_define_std ("powerpc"); \
306 builtin_assert ("cpu=powerpc"); \
307 builtin_assert ("machine=powerpc"); \
308 TARGET_OS_SYSV_CPP_BUILTINS (); \
313 #undef CPP_OS_DEFAULT_SPEC
314 #define CPP_OS_DEFAULT_SPEC "%(cpp_os_linux)"
316 /* The GNU C++ standard library currently requires _GNU_SOURCE being
317 defined on glibc-based systems. This temporary hack accomplishes this,
318 it should go away as soon as libstdc++-v3 has a real fix. */
319 #undef CPLUSPLUS_CPP_SPEC
320 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
322 #undef LINK_SHLIB_SPEC
323 #define LINK_SHLIB_SPEC "%{shared:-shared} %{!shared: %{static:-static}}"
325 #undef LIB_DEFAULT_SPEC
326 #define LIB_DEFAULT_SPEC "%(lib_linux)"
328 #undef STARTFILE_DEFAULT_SPEC
329 #define STARTFILE_DEFAULT_SPEC "%(startfile_linux)"
331 #undef ENDFILE_DEFAULT_SPEC
332 #define ENDFILE_DEFAULT_SPEC "%(endfile_linux)"
334 #undef LINK_START_DEFAULT_SPEC
335 #define LINK_START_DEFAULT_SPEC "%(link_start_linux)"
337 #undef LINK_OS_DEFAULT_SPEC
338 #define LINK_OS_DEFAULT_SPEC "%(link_os_linux)"
340 #define LINK_OS_LINUX_SPEC32 "-m elf32ppclinux %{!shared: %{!static: \
341 %{rdynamic:-export-dynamic} \
342 %{!dynamic-linker:-dynamic-linker /lib/ld.so.1}}}"
344 #define LINK_OS_LINUX_SPEC64 "-m elf64ppc %{!shared: %{!static: \
345 %{rdynamic:-export-dynamic} \
346 %{!dynamic-linker:-dynamic-linker /lib64/ld64.so.1}}}"
348 #undef TOC_SECTION_ASM_OP
349 #define TOC_SECTION_ASM_OP \
351 ? "\t.section\t\".toc\",\"aw\"" \
352 : "\t.section\t\".got\",\"aw\"")
354 #undef MINIMAL_TOC_SECTION_ASM_OP
355 #define MINIMAL_TOC_SECTION_ASM_OP \
357 ? "\t.section\t\".toc1\",\"aw\"" \
358 : ((TARGET_RELOCATABLE || flag_pic) \
359 ? "\t.section\t\".got2\",\"aw\"" \
360 : "\t.section\t\".got1\",\"aw\""))
362 #undef TARGET_VERSION
363 #define TARGET_VERSION fprintf (stderr, " (PowerPC64 GNU/Linux)");
365 /* Must be at least as big as our pointer type. */
367 #define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int")
370 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
373 #define WCHAR_TYPE (TARGET_64BIT ? "int" : "long int")
374 #undef WCHAR_TYPE_SIZE
375 #define WCHAR_TYPE_SIZE 32
377 /* Override rs6000.h definition. */
379 #define ASM_APP_ON "#APP\n"
381 /* Override rs6000.h definition. */
383 #define ASM_APP_OFF "#NO_APP\n"
385 /* PowerPC no-op instruction. */
386 #undef RS6000_CALL_GLUE
387 #define RS6000_CALL_GLUE (TARGET_64BIT ? "nop" : "cror 31,31,31")
390 #define RS6000_MCOUNT "_mcount"
393 /* _init and _fini functions are built from bits spread across many
394 object files, each potentially with a different TOC pointer. For
395 that reason, place a nop after the call so that the linker can
396 restore the TOC pointer if a TOC adjusting call stub is needed. */
398 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
399 asm (SECTION_OP "\n" \
404 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
405 asm (SECTION_OP "\n" \
412 /* FP save and restore routines. */
413 #undef SAVE_FP_PREFIX
414 #define SAVE_FP_PREFIX (TARGET_64BIT ? "._savef" : "_savefpr_")
415 #undef SAVE_FP_SUFFIX
416 #define SAVE_FP_SUFFIX (TARGET_64BIT ? "" : "_l")
417 #undef RESTORE_FP_PREFIX
418 #define RESTORE_FP_PREFIX (TARGET_64BIT ? "._restf" : "_restfpr_")
419 #undef RESTORE_FP_SUFFIX
420 #define RESTORE_FP_SUFFIX (TARGET_64BIT ? "" : "_l")
422 /* Dwarf2 debugging. */
423 #undef PREFERRED_DEBUGGING_TYPE
424 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
426 /* This is how to declare the size of a function. */
427 #undef ASM_DECLARE_FUNCTION_SIZE
428 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
431 if (!flag_inhibit_size_directive) \
433 fputs ("\t.size\t", (FILE)); \
434 if (TARGET_64BIT && DOT_SYMBOLS) \
435 putc ('.', (FILE)); \
436 assemble_name ((FILE), (FNAME)); \
437 fputs (",.-", (FILE)); \
438 rs6000_output_function_entry (FILE, FNAME); \
439 putc ('\n', (FILE)); \
444 /* Return nonzero if this entry is to be written into the constant
445 pool in a special way. We do so if this is a SYMBOL_REF, LABEL_REF
446 or a CONST containing one of them. If -mfp-in-toc (the default),
447 we also do this for floating-point constants. We actually can only
448 do this if the FP formats of the target and host machines are the
449 same, but we can't check that since not every file that uses
450 GO_IF_LEGITIMATE_ADDRESS_P includes real.h. We also do this when
451 we can write the entry into the TOC and the entry is not larger
454 #undef ASM_OUTPUT_SPECIAL_POOL_ENTRY_P
455 #define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) \
457 && (GET_CODE (X) == SYMBOL_REF \
458 || (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS \
459 && GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF) \
460 || GET_CODE (X) == LABEL_REF \
461 || (GET_CODE (X) == CONST_INT \
462 && GET_MODE_BITSIZE (MODE) <= GET_MODE_BITSIZE (Pmode)) \
463 || (GET_CODE (X) == CONST_DOUBLE \
465 && (TARGET_POWERPC64 \
466 || TARGET_MINIMAL_TOC \
467 || (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT \
468 && ! TARGET_NO_FP_IN_TOC))) \
470 && !TARGET_NO_FP_IN_TOC \
471 && !TARGET_RELOCATABLE \
472 && GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT \
473 && BITS_PER_WORD == HOST_BITS_PER_INT)))))
475 /* This is the same as the dbxelf.h version, except that we need to
476 use the function code label, not the function descriptor. */
477 #undef ASM_OUTPUT_SOURCE_LINE
478 #define ASM_OUTPUT_SOURCE_LINE(FILE, LINE, COUNTER) \
483 ASM_GENERATE_INTERNAL_LABEL (temp, "LM", COUNTER); \
484 fprintf (FILE, "\t.stabn 68,0,%d,", LINE); \
485 assemble_name (FILE, temp); \
487 s = XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0); \
488 rs6000_output_function_entry (FILE, s); \
490 (*targetm.asm_out.internal_label) (FILE, "LM", COUNTER); \
494 /* Similarly, we want the function code label here. */
495 #define DBX_OUTPUT_BRAC(FILE, NAME, BRAC) \
499 fprintf (FILE, "%s%d,0,0,", ASM_STABN_OP, BRAC); \
500 assemble_name (FILE, NAME); \
502 if (current_function_func_begin_label != NULL) \
504 assemble_name (FILE, current_function_func_begin_label); \
508 s = XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0); \
509 rs6000_output_function_entry (FILE, s); \
515 #define DBX_OUTPUT_LBRAC(FILE, NAME) DBX_OUTPUT_BRAC (FILE, NAME, N_LBRAC)
516 #define DBX_OUTPUT_RBRAC(FILE, NAME) DBX_OUTPUT_BRAC (FILE, NAME, N_RBRAC)
518 /* Another case where we want the dot name. */
519 #define DBX_OUTPUT_NFUN(FILE, LSCOPE, DECL) \
523 fprintf (FILE, "%s\"\",%d,0,0,", ASM_STABS_OP, N_FUN); \
524 assemble_name (FILE, LSCOPE); \
526 s = XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0); \
527 rs6000_output_function_entry (FILE, s); \
532 /* Select a format to encode pointers in exception handling data. CODE
533 is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is
534 true if the symbol may be affected by dynamic relocations. */
535 #undef ASM_PREFERRED_EH_DATA_FORMAT
536 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
537 ((TARGET_64BIT || flag_pic || TARGET_RELOCATABLE) \
538 ? (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel \
539 | (TARGET_64BIT ? DW_EH_PE_udata8 : DW_EH_PE_sdata4)) \
542 /* For backward compatibility, we must continue to use the AIX
543 structure return convention. */
544 #undef DRAFT_V4_STRUCT_RET
545 #define DRAFT_V4_STRUCT_RET (!TARGET_64BIT)
547 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack
549 #define TARGET_HAS_F_SETLKW
551 #define LINK_GCC_C_SEQUENCE_SPEC \
552 "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
554 /* Use --as-needed -lgcc_s for eh support. */
555 #ifdef HAVE_LD_AS_NEEDED
556 #define USE_LD_AS_NEEDED 1
559 #define MD_UNWIND_SUPPORT "config/rs6000/linux-unwind.h"
561 #define OS_MISSING_POWERPC64 !TARGET_64BIT