linux64.h revision 103445
1/* Definitions of target machine for GNU compiler, 2 for 64 bit powerpc linux. 3 Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc. 4 5This file is part of GNU CC. 6 7GNU CC is free software; you can redistribute it and/or modify 8it under the terms of the GNU General Public License as published by 9the Free Software Foundation; either version 2, or (at your option) 10any later version. 11 12GNU CC is distributed in the hope that it will be useful, 13but WITHOUT ANY WARRANTY; without even the implied warranty of 14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15GNU General Public License for more details. 16 17You should have received a copy of the GNU General Public License 18along with GNU CC; see the file COPYING. If not, write to 19the Free Software Foundation, 59 Temple Place - Suite 330, 20Boston, MA 02111-1307, USA. */ 21 22/* Yes! We are AIX! Err. Wait. We're Linux!. No, wait, we're a 23 combo of both!*/ 24#undef DEFAULT_ABI 25#define DEFAULT_ABI ABI_AIX 26 27#undef TARGET_AIX 28#define TARGET_AIX 1 29 30#undef TARGET_DEFAULT 31#define TARGET_DEFAULT \ 32 (MASK_POWERPC | MASK_POWERPC64 | MASK_64BIT | MASK_NEW_MNEMONICS) 33 34#undef CPP_DEFAULT_SPEC 35#define CPP_DEFAULT_SPEC "-D_ARCH_PPC64" 36 37#undef ASM_DEFAULT_SPEC 38#define ASM_DEFAULT_SPEC "-mppc64" 39 40#undef ASM_SPEC 41#define ASM_SPEC "%{.s: %{mregnames} %{mno-regnames}} \ 42%{.S: %{mregnames} %{mno-regnames}} \ 43%{mlittle} %{mlittle-endian} %{mbig} %{mbig-endian} \ 44%{v:-V} %{Qy:} %{!Qn:-Qy} -a64 %(asm_cpu) %{Wa,*:%*}" 45 46/* 64-bit PowerPC Linux always has a TOC. */ 47#undef TARGET_NO_TOC 48#define TARGET_NO_TOC 0 49#undef TARGET_TOC 50#define TARGET_TOC 1 51 52/* We use glibc _mcount for profiling. */ 53#define NO_PROFILE_COUNTERS 1 54#undef PROFILE_BEFORE_PROLOGUE 55 56/* Define this for kernel profiling, which just saves LR then calls 57 _mcount without worrying about arg saves. The idea is to change 58 the function prologue as little as possible as it isn't easy to 59 account for arg save/restore code added just for _mcount. */ 60/* #define PROFILE_KERNEL 1 */ 61#if PROFILE_KERNEL 62#define PROFILE_BEFORE_PROLOGUE 1 63#undef PROFILE_HOOK 64#else 65#define PROFILE_HOOK(LABEL) output_profile_hook (LABEL) 66#endif 67 68/* We don't need to generate entries in .fixup. */ 69#undef RELOCATABLE_NEEDS_FIXUP 70 71#define USER_LABEL_PREFIX "" 72 73/* AIX word-aligns FP doubles but doubleword-aligns 64-bit ints. */ 74#undef ADJUST_FIELD_ALIGN 75#define ADJUST_FIELD_ALIGN(FIELD, COMPUTED) \ 76 (TYPE_MODE (TREE_CODE (TREE_TYPE (FIELD)) == ARRAY_TYPE \ 77 ? get_inner_array_type (FIELD) \ 78 : TREE_TYPE (FIELD)) == DFmode \ 79 ? MIN ((COMPUTED), 32) : (COMPUTED)) 80 81/* AIX increases natural record alignment to doubleword if the first 82 field is an FP double while the FP fields remain word aligned. */ 83#undef ROUND_TYPE_ALIGN 84#define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) \ 85 ((TREE_CODE (STRUCT) == RECORD_TYPE \ 86 || TREE_CODE (STRUCT) == UNION_TYPE \ 87 || TREE_CODE (STRUCT) == QUAL_UNION_TYPE) \ 88 && TYPE_FIELDS (STRUCT) != 0 \ 89 && DECL_MODE (TYPE_FIELDS (STRUCT)) == DFmode \ 90 ? MAX (MAX ((COMPUTED), (SPECIFIED)), 64) \ 91 : MAX ((COMPUTED), (SPECIFIED))) 92 93/* Indicate that jump tables go in the text section. */ 94#undef JUMP_TABLES_IN_TEXT_SECTION 95#define JUMP_TABLES_IN_TEXT_SECTION 1 96 97/* 64-bit PowerPC Linux always has GPR13 fixed. */ 98#define FIXED_R13 1 99 100/* __throw will restore its own return address to be the same as the 101 return address of the function that the throw is being made to. 102 This is unfortunate, because we want to check the original 103 return address to see if we need to restore the TOC. 104 So we have to squirrel it away with this. */ 105#define SETUP_FRAME_ADDRESSES() rs6000_aix_emit_builtin_unwind_init () 106 107/* Don't assume anything about the header files. */ 108#define NO_IMPLICIT_EXTERN_C 109 110#undef MD_EXEC_PREFIX 111#undef MD_STARTFILE_PREFIX 112 113#undef CPP_PREDEFINES 114#define CPP_PREDEFINES \ 115 "-D_PPC_ -D__PPC__ -D_PPC64_ -D__PPC64__ -D__powerpc__ -D__powerpc64__ \ 116 -D_PIC_ -D__PIC__ -D_BIG_ENDIAN -D__BIG_ENDIAN__ -D__ELF__ \ 117 -D__LONG_MAX__=9223372036854775807L \ 118 -Acpu=powerpc64 -Amachine=powerpc64" 119 120#undef CPP_OS_DEFAULT_SPEC 121#define CPP_OS_DEFAULT_SPEC "%(cpp_os_linux)" 122 123/* The GNU C++ standard library currently requires _GNU_SOURCE being 124 defined on glibc-based systems. This temporary hack accomplishes this, 125 it should go away as soon as libstdc++-v3 has a real fix. */ 126#undef CPLUSPLUS_CPP_SPEC 127#define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)" 128 129#undef LINK_SHLIB_SPEC 130#define LINK_SHLIB_SPEC "%{shared:-shared} %{!shared: %{static:-static}}" 131 132#undef LIB_DEFAULT_SPEC 133#define LIB_DEFAULT_SPEC "%(lib_linux)" 134 135#undef STARTFILE_DEFAULT_SPEC 136#define STARTFILE_DEFAULT_SPEC "%(startfile_linux)" 137 138#undef ENDFILE_DEFAULT_SPEC 139#define ENDFILE_DEFAULT_SPEC "%(endfile_linux)" 140 141#undef LINK_START_DEFAULT_SPEC 142#define LINK_START_DEFAULT_SPEC "%(link_start_linux)" 143 144#undef LINK_OS_DEFAULT_SPEC 145#define LINK_OS_DEFAULT_SPEC "%(link_os_linux)" 146 147#undef LINK_OS_LINUX_SPEC 148#ifndef CROSS_COMPILE 149#define LINK_OS_LINUX_SPEC "-m elf64ppc %{!shared: %{!static: \ 150 %{rdynamic:-export-dynamic} \ 151 %{!dynamic-linker:-dynamic-linker /lib64/ld.so.1}}}" 152#else 153#define LINK_OS_LINUX_SPEC "-m elf64ppc %{!shared: %{!static: \ 154 %{rdynamic:-export-dynamic} \ 155 %{!dynamic-linker:-dynamic-linker ld.so.1}}}" 156#endif 157 158#ifndef CROSS_COMPILE 159#undef STARTFILE_LINUX_SPEC 160#define STARTFILE_LINUX_SPEC "\ 161%{!shared: %{pg:/usr/lib64/gcrt1.o%s} %{!pg:%{p:/usr/lib64/gcrt1.o%s} \ 162 %{!p:/usr/lib64/crt1.o%s}}} /usr/lib64/crti.o%s \ 163%{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}" 164#endif 165 166#ifndef CROSS_COMPILE 167#undef ENDFILE_LINUX_SPEC 168#define ENDFILE_LINUX_SPEC "\ 169%{!shared:crtend.o%s} %{shared:crtendS.o%s} /usr/lib64/crtn.o%s" 170#endif 171 172#undef TOC_SECTION_ASM_OP 173#define TOC_SECTION_ASM_OP "\t.section\t\".toc\",\"aw\"" 174 175#undef MINIMAL_TOC_SECTION_ASM_OP 176#define MINIMAL_TOC_SECTION_ASM_OP "\t.section\t\".toc1\",\"aw\"" 177 178#undef TARGET_VERSION 179#define TARGET_VERSION fprintf (stderr, " (PowerPC64 GNU/Linux)"); 180 181/* Must be at least as big as our pointer type. */ 182#undef SIZE_TYPE 183#define SIZE_TYPE "long unsigned int" 184 185#undef PTRDIFF_TYPE 186#define PTRDIFF_TYPE "long int" 187 188#undef WCHAR_TYPE 189#define WCHAR_TYPE "int" 190#undef WCHAR_TYPE_SIZE 191#define WCHAR_TYPE_SIZE 32 192 193/* Override rs6000.h definition. */ 194#undef ASM_APP_ON 195#define ASM_APP_ON "#APP\n" 196 197/* Override rs6000.h definition. */ 198#undef ASM_APP_OFF 199#define ASM_APP_OFF "#NO_APP\n" 200 201/* PowerPC no-op instruction. */ 202#undef RS6000_CALL_GLUE 203#define RS6000_CALL_GLUE "nop" 204 205#undef RS6000_MCOUNT 206#define RS6000_MCOUNT "_mcount" 207 208/* FP save and restore routines. */ 209#undef SAVE_FP_PREFIX 210#define SAVE_FP_PREFIX "._savef" 211#undef SAVE_FP_SUFFIX 212#define SAVE_FP_SUFFIX "" 213#undef RESTORE_FP_PREFIX 214#define RESTORE_FP_PREFIX "._restf" 215#undef RESTORE_FP_SUFFIX 216#define RESTORE_FP_SUFFIX "" 217 218/* Dwarf2 debugging. */ 219#undef PREFERRED_DEBUGGING_TYPE 220#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG 221 222/* If we are referencing a function that is static or is known to be 223 in this file, make the SYMBOL_REF special. We can use this to indicate 224 that we can branch to this function without emitting a no-op after the 225 call. Do not set this flag if the function is weakly defined. */ 226 227#undef ENCODE_SECTION_INFO 228#define ENCODE_SECTION_INFO(DECL) \ 229 if (TREE_CODE (DECL) == FUNCTION_DECL \ 230 && (TREE_ASM_WRITTEN (DECL) || ! TREE_PUBLIC (DECL)) \ 231 && ! DECL_WEAK (DECL)) \ 232 SYMBOL_REF_FLAG (XEXP (DECL_RTL (DECL), 0)) = 1; 233 234/* This is how to output a reference to a user-level label named NAME. 235 `assemble_name' uses this. */ 236 237/* Override elfos.h definition. */ 238#undef ASM_OUTPUT_LABELREF 239#define ASM_OUTPUT_LABELREF(FILE,NAME) \ 240do { \ 241 const char *_name = NAME; \ 242 if (*_name == '@') \ 243 _name++; \ 244 \ 245 if (*_name == '*') \ 246 fprintf (FILE, "%s", _name + 1); \ 247 else \ 248 asm_fprintf (FILE, "%U%s", _name); \ 249} while (0) 250 251#undef ASM_DECLARE_FUNCTION_NAME 252#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ 253 do \ 254 { \ 255 fputs ("\t.section\t\".opd\",\"aw\"\n\t.align 3\n", (FILE)); \ 256 ASM_OUTPUT_LABEL ((FILE), (NAME)); \ 257 fputs (DOUBLE_INT_ASM_OP, (FILE)); \ 258 putc ('.', (FILE)); \ 259 assemble_name ((FILE), (NAME)); \ 260 fputs (",.TOC.@tocbase,0\n\t.previous\n\t.size\t", (FILE)); \ 261 assemble_name ((FILE), (NAME)); \ 262 fputs (",24\n\t.type\t.", (FILE)); \ 263 assemble_name ((FILE), (NAME)); \ 264 fputs (",@function\n", (FILE)); \ 265 if (TREE_PUBLIC (DECL) && ! DECL_WEAK (DECL)) \ 266 { \ 267 fputs ("\t.globl\t.", (FILE)); \ 268 assemble_name ((FILE), (NAME)); \ 269 putc ('\n', (FILE)); \ 270 } \ 271 ASM_DECLARE_RESULT ((FILE), DECL_RESULT (DECL)); \ 272 putc ('.', (FILE)); \ 273 ASM_OUTPUT_LABEL ((FILE), (NAME)); \ 274 } \ 275 while (0) 276 277/* This is how to declare the size of a function. */ 278#undef ASM_DECLARE_FUNCTION_SIZE 279#define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \ 280 do \ 281 { \ 282 if (!flag_inhibit_size_directive) \ 283 { \ 284 fputs ("\t.size\t.", (FILE)); \ 285 assemble_name ((FILE), (FNAME)); \ 286 fputs (",.-.", (FILE)); \ 287 assemble_name ((FILE), (FNAME)); \ 288 putc ('\n', (FILE)); \ 289 } \ 290 } \ 291 while (0) 292 293/* Return non-zero if this entry is to be written into the constant 294 pool in a special way. We do so if this is a SYMBOL_REF, LABEL_REF 295 or a CONST containing one of them. If -mfp-in-toc (the default), 296 we also do this for floating-point constants. We actually can only 297 do this if the FP formats of the target and host machines are the 298 same, but we can't check that since not every file that uses 299 GO_IF_LEGITIMATE_ADDRESS_P includes real.h. We also do this when 300 we can write the entry into the TOC and the entry is not larger 301 than a TOC entry. */ 302 303#undef ASM_OUTPUT_SPECIAL_POOL_ENTRY_P 304#define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) \ 305 (TARGET_TOC \ 306 && (GET_CODE (X) == SYMBOL_REF \ 307 || (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS \ 308 && GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF) \ 309 || GET_CODE (X) == LABEL_REF \ 310 || (GET_CODE (X) == CONST_INT \ 311 && GET_MODE_BITSIZE (MODE) <= GET_MODE_BITSIZE (Pmode)) \ 312 || (GET_CODE (X) == CONST_DOUBLE \ 313 && (TARGET_POWERPC64 \ 314 || TARGET_MINIMAL_TOC \ 315 || (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT \ 316 && ! TARGET_NO_FP_IN_TOC))))) 317 318/* This is the same as the dbxelf.h version, except that we need to 319 use the function code label, not the function descriptor. */ 320#undef ASM_OUTPUT_SOURCE_LINE 321#define ASM_OUTPUT_SOURCE_LINE(FILE, LINE) \ 322do \ 323 { \ 324 static int sym_lineno = 1; \ 325 char temp[256]; \ 326 ASM_GENERATE_INTERNAL_LABEL (temp, "LM", sym_lineno); \ 327 fprintf (FILE, "\t.stabn 68,0,%d,", LINE); \ 328 assemble_name (FILE, temp); \ 329 fputs ("-.", FILE); \ 330 assemble_name (FILE, \ 331 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));\ 332 putc ('\n', FILE); \ 333 ASM_OUTPUT_INTERNAL_LABEL (FILE, "LM", sym_lineno); \ 334 sym_lineno += 1; \ 335 } \ 336while (0) 337 338/* Similarly, we want the function code label here. */ 339#define DBX_OUTPUT_BRAC(FILE, NAME, BRAC) \ 340 do \ 341 { \ 342 const char *flab; \ 343 fprintf (FILE, "%s%d,0,0,", ASM_STABN_OP, BRAC); \ 344 assemble_name (FILE, NAME); \ 345 putc ('-', FILE); \ 346 if (current_function_func_begin_label != NULL_TREE) \ 347 flab = IDENTIFIER_POINTER (current_function_func_begin_label); \ 348 else \ 349 { \ 350 putc ('.', FILE); \ 351 flab = XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0); \ 352 } \ 353 assemble_name (FILE, flab); \ 354 putc ('\n', FILE); \ 355 } \ 356 while (0) 357 358#define DBX_OUTPUT_LBRAC(FILE, NAME) DBX_OUTPUT_BRAC (FILE, NAME, N_LBRAC) 359#define DBX_OUTPUT_RBRAC(FILE, NAME) DBX_OUTPUT_BRAC (FILE, NAME, N_RBRAC) 360 361/* Another case where we want the dot name. */ 362#define DBX_OUTPUT_NFUN(FILE, LSCOPE, DECL) \ 363 do \ 364 { \ 365 fprintf (FILE, "%s\"\",%d,0,0,", ASM_STABS_OP, N_FUN); \ 366 assemble_name (FILE, LSCOPE); \ 367 fputs ("-.", FILE); \ 368 assemble_name (FILE, XSTR (XEXP (DECL_RTL (DECL), 0), 0)); \ 369 putc ('\n', FILE); \ 370 } \ 371 while (0) 372 373/* Override sysv4.h as these are ABI_V4 only. */ 374#undef ASM_OUTPUT_REG_PUSH 375#undef ASM_OUTPUT_REG_POP 376 377/* Select a format to encode pointers in exception handling data. CODE 378 is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is 379 true if the symbol may be affected by dynamic relocations. */ 380#undef ASM_PREFERRED_EH_DATA_FORMAT 381#define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \ 382 (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel | DW_EH_PE_udata8) 383