gcc/config/sparc/linux64.h

   1 /* Definitions for 64-bit SPARC running Linux-based GNU systems with ELF.
   2    Copyright 1996, 1997, 1998 Free Software Foundation, Inc.
   3    Contributed by David S. Miller (davem@caip.rutgers.edu)
   4
   5 This file is part of GNU CC.
   6
   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)
  10 any later version.
  11
  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.
  16
  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.  */
  21
  22 #define SPARC_BI_ARCH
  23
  24 #define LINUX_DEFAULT_ELF
  25
  26 /* Don't assume anything about the header files. */
  27 #define NO_IMPLICIT_EXTERN_C
  28
  29 #undef DEFAULT_VTABLE_THUNKS
  30 #define DEFAULT_VTABLE_THUNKS 1
  31
  32 #include <sparc/sysv4.h>
  33
  34 #undef MD_EXEC_PREFIX
  35 #undef MD_STARTFILE_PREFIX
  36
  37 #if TARGET_CPU_DEFAULT == TARGET_CPU_v9 || TARGET_CPU_DEFAULT == TARGET_CPU_ultrasparc
  38 /* A 64 bit v9 compiler with stack-bias,
  39    in a Medium/Low code model environment.  */
  40
  41 #undef TARGET_DEFAULT
  42 #define TARGET_DEFAULT \
  43   (MASK_V9 + MASK_PTR64 + MASK_64BIT /* + MASK_HARD_QUAD */ \
  44    + MASK_STACK_BIAS + MASK_APP_REGS + MASK_EPILOGUE + MASK_FPU)
  45 #endif
  46
  47 /* Output at beginning of assembler file.  */
  48 /* The .file command should always begin the output.  */
  49 #undef ASM_FILE_START
  50 #define ASM_FILE_START(FILE)                                            \
  51   do {                                                                  \
  52         output_file_directive (FILE, main_input_filename);              \
  53         fprintf (FILE, "\t.version\t\"01.01\"\n");                      \
  54   } while (0)
  55
  56 #undef ASM_CPU_DEFAULT_SPEC
  57 #define ASM_CPU_DEFAULT_SPEC "-Av9a"
  58
  59 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
  60    the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
  61    provides part of the support for getting C++ file-scope static
  62    object constructed before entering `main'. */
  63
  64 #undef  STARTFILE_SPEC
  65
  66 #define STARTFILE_SPEC32 \
  67   "%{!shared: \
  68      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}}\
  69    crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
  70
  71 #define STARTFILE_SPEC64 \
  72   "%{!shared: \
  73      %{pg:/usr/lib64/gcrt1.o%s} %{!pg:%{p:/usr/lib64/gcrt1.o%s} %{!p:/usr/lib64/crt1.o%s}}}\
  74    /usr/lib64/crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
  75
  76 #ifdef SPARC_BI_ARCH
  77
  78 #if DEFAULT_ARCH32_P
  79 #define STARTFILE_SPEC "\
  80 %{m32:" STARTFILE_SPEC32 "} \
  81 %{m64:" STARTFILE_SPEC64 "} \
  82 %{!m32:%{!m64:" STARTFILE_SPEC32 "}}"
  83 #else
  84 #define STARTFILE_SPEC "\
  85 %{m32:" STARTFILE_SPEC32 "} \
  86 %{m64:" STARTFILE_SPEC64 "} \
  87 %{!m32:%{!m64:" STARTFILE_SPEC64 "}}"
  88 #endif
  89
  90 #else
  91
  92 #define STARTFILE_SPEC STARTFILE_SPEC64
  93
  94 #endif
  95
  96 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
  97    the GNU/Linux magical crtend.o file (see crtstuff.c) which
  98    provides part of the support for getting C++ file-scope static
  99    object constructed before entering `main', followed by a normal
 100    GNU/Linux "finalizer" file, `crtn.o'.  */
 101
 102 #undef  ENDFILE_SPEC
 103
 104 #define ENDFILE_SPEC32 \
 105   "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
 106
 107 #define ENDFILE_SPEC64 \
 108   "%{!shared:crtend.o%s} %{shared:crtendS.o%s} /usr/lib64/crtn.o%s"
 109
 110 #ifdef SPARC_BI_ARCH
 111
 112 #if DEFAULT_ARCH32_P
 113 #define ENDFILE_SPEC "\
 114 %{m32:" ENDFILE_SPEC32 "} \
 115 %{m64:" ENDFILE_SPEC64 "} \
 116 %{!m32:%{!m64:" ENDFILE_SPEC32 "}}"
 117 #else
 118 #define ENDFILE_SPEC "\
 119 %{m32:" ENDFILE_SPEC32 "} \
 120 %{m64:" ENDFILE_SPEC64 "} \
 121 %{!m32:%{!m64:" ENDFILE_SPEC64 "}}"
 122 #endif
 123
 124 #else
 125
 126 #define ENDFILE_SPEC ENDFILE_SPEC64
 127
 128 #endif
 129
 130 #undef TARGET_VERSION
 131 #define TARGET_VERSION fprintf (stderr, " (sparc64 GNU/Linux with ELF)");
 132
 133 /* The default code model.  */
 134 #undef SPARC_DEFAULT_CMODEL
 135 #define SPARC_DEFAULT_CMODEL CM_MEDLOW
 136
 137 #undef WCHAR_TYPE
 138 #define WCHAR_TYPE "int"
 139
 140 #undef WCHAR_TYPE_SIZE
 141 #define WCHAR_TYPE_SIZE 32
 142
 143 #undef MAX_WCHAR_TYPE_SIZE
 144
 145 #undef LONG_DOUBLE_TYPE_SIZE
 146 #define LONG_DOUBLE_TYPE_SIZE 128
 147
 148 #undef CPP_PREDEFINES
 149 #define CPP_PREDEFINES "-D__ELF__ -Dunix -D_LONGLONG -D__sparc__ -Dlinux -Asystem(unix) -Asystem(posix)"
 150
 151 #undef CPP_SUBTARGET_SPEC
 152 #define CPP_SUBTARGET_SPEC "\
 153 %{fPIC:-D__PIC__ -D__pic__} \
 154 %{fpic:-D__PIC__ -D__pic__} \
 155 %{posix:-D_POSIX_SOURCE} \
 156 %{pthread:-D_REENTRANT} \
 157 "
 158
 159 #undef LIB_SPEC
 160 #define LIB_SPEC \
 161   "%{shared: -lc} \
 162    %{!shared: %{mieee-fp:-lieee} %{pthread:-lpthread} \
 163      %{profile:-lc_p} %{!profile: -lc}}"
 164
 165 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
 166    for the special GCC options -static and -shared, which allow us to
 167    link things in one of these three modes by applying the appropriate
 168    combinations of options at link-time. We like to support here for
 169    as many of the other GNU linker options as possible. But I don't
 170    have the time to search for those flags. I am sure how to add
 171    support for -soname shared_object_name. H.J.
 172
 173    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
 174    -Wl,-V.
 175
 176    When the -shared link option is used a final link is not being
 177    done.  */
 178
 179 /* If ELF is the default format, we should not use /lib/elf. */
 180
 181 #ifdef SPARC_BI_ARCH
 182
 183 #undef SUBTARGET_EXTRA_SPECS
 184 #define SUBTARGET_EXTRA_SPECS \
 185   { "link_arch32",       LINK_ARCH32_SPEC },              \
 186   { "link_arch64",       LINK_ARCH64_SPEC },              \
 187   { "link_arch_default", LINK_ARCH_DEFAULT_SPEC },        \
 188   { "link_arch",         LINK_ARCH_SPEC },
 189
 190 #define LINK_ARCH32_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 191   %{!shared: \
 192     %{!ibcs: \
 193       %{!static: \
 194         %{rdynamic:-export-dynamic} \
 195         %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
 196         %{static:-static}}} \
 197 "
 198
 199 #define LINK_ARCH64_SPEC "-m elf64_sparc -Y P,/usr/lib64 %{shared:-shared} \
 200   %{!shared: \
 201     %{!ibcs: \
 202       %{!static: \
 203         %{rdynamic:-export-dynamic} \
 204         %{!dynamic-linker:-dynamic-linker /lib64/ld-linux.so.2}} \
 205         %{static:-static}}} \
 206 "
 207
 208 #define LINK_ARCH_SPEC "\
 209 %{m32:%(link_arch32)} \
 210 %{m64:%(link_arch64)} \
 211 %{!m32:%{!m64:%(link_arch_default)}} \
 212 "
 213
 214 #define LINK_ARCH_DEFAULT_SPEC \
 215 (DEFAULT_ARCH32_P ? LINK_ARCH32_SPEC : LINK_ARCH64_SPEC)
 216
 217 #undef  LINK_SPEC
 218 #define LINK_SPEC "\
 219 %(link_arch) \
 220 %{mlittle-endian:-EL} \
 221 "
 222
 223 #undef  CC1_SPEC
 224 #if DEFAULT_ARCH32_P
 225 #define CC1_SPEC "\
 226 %{sun4:} %{target:} \
 227 %{mcypress:-mcpu=cypress} \
 228 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
 229 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
 230 %{m64:-mptr64 -mstack-bias \
 231   %{!mcpu*:%{!mcypress:%{!msparclite:%{!mf930:%{!mf934:%{!mv8:%{!msupersparc:-mcpu=ultrasparc}}}}}}} \
 232   %{!mno-vis:%{!mcpu=v9:-mvis}}} \
 233 %{!m64:%{g*:%{!gs*:%{!gd*:%{!gx*:%{!gc*:-gstabs+}}}}}} \
 234 "
 235 #else
 236 #define CC1_SPEC "\
 237 %{sun4:} %{target:} \
 238 %{mcypress:-mcpu=cypress} \
 239 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
 240 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
 241 %{m32:-mptr32 -mno-stack-bias \
 242   %{!mcpu*:%{!mcypress:%{!msparclite:%{!mf930:%{!mf934:%{!mv8:%{!msupersparc:-mcpu=cypress}}}}}}} \
 243   %{g*:%{!gs*:%{!gd*:%{!gx*:%{!gc*:-gstabs+}}}}}} \
 244 %{!m32:%{!mcpu*:-mcpu=ultrasparc}} \
 245 %{!mno-vis:%{!m32:%{!mcpu=v9:-mvis}}} \
 246 "
 247 #endif
 248
 249 #if DEFAULT_ARCH32_P
 250 #define MULTILIB_DEFAULTS { "m32" }
 251 #else
 252 #define MULTILIB_DEFAULTS { "m64" }
 253 #endif
 254
 255 #else /* !SPARC_BI_ARCH */
 256
 257 #undef LINK_SPEC
 258 #define LINK_ARCH_SPEC "-m elf64_sparc -Y P,/usr/lib64 %{shared:-shared} \
 259   %{!shared: \
 260     %{!ibcs: \
 261       %{!static: \
 262         %{rdynamic:-export-dynamic} \
 263         %{!dynamic-linker:-dynamic-linker /lib64/ld-linux.so.2}} \
 264         %{static:-static}}} \
 265 %{mlittle-endian:-EL} \
 266 "
 267
 268 #endif /* !SPARC_BI_ARCH */
 269
 270 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
 271    It's safe to pass -s always, even if -g is not used. */
 272 #undef ASM_SPEC
 273 #define ASM_SPEC "\
 274 %{V} \
 275 %{v:%{!V:-V}} \
 276 %{!Qn:-Qy} \
 277 %{n} \
 278 %{T} \
 279 %{Ym,*} \
 280 %{Wa,*:%*} \
 281 -s %{fpic:-K PIC} %{fPIC:-K PIC} \
 282 %{mlittle-endian:-EL} \
 283 %(asm_cpu) %(asm_arch) \
 284 "
 285
 286 /* Same as sparc.h */
 287 #undef DBX_REGISTER_NUMBER
 288 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 289
 290 /* System V Release 4 uses DWARF debugging info.  Buf DWARF1 doesn't do
 291    64-bit anything, so we use DWARF2.  */
 292
 293 #undef DWARF2_DEBUGGING_INFO
 294 #undef DWARF_DEBUGGING_INFO
 295 #undef DBX_DEBUGGING_INFO
 296 #define DWARF2_DEBUGGING_INFO
 297 #define DBX_DEBUGGING_INFO
 298
 299 #undef PREFERRED_DEBUGGING_TYPE
 300 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 301
 302 #undef ASM_OUTPUT_ALIGNED_LOCAL
 303 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 304 do {                                                                    \
 305   fputs ("\t.local\t", (FILE));         \
 306   assemble_name ((FILE), (NAME));                                       \
 307   putc ('\n', (FILE));                                                  \
 308   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 309 } while (0)
 310
 311 #undef COMMON_ASM_OP
 312 #define COMMON_ASM_OP "\t.common"
 313
 314 /* This is how to output a definition of an internal numbered label where
 315    PREFIX is the class of label and NUM is the number within the class.  */
 316
 317 #undef  ASM_OUTPUT_INTERNAL_LABEL
 318 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)      \
 319   fprintf (FILE, ".L%s%d:\n", PREFIX, NUM)
 320
 321 /* This is how to output a reference to an internal numbered label where
 322    PREFIX is the class of label and NUM is the number within the class.  */
 323
 324 #undef  ASM_OUTPUT_INTERNAL_LABELREF
 325 #define ASM_OUTPUT_INTERNAL_LABELREF(FILE,PREFIX,NUM)   \
 326   fprintf (FILE, ".L%s%d", PREFIX, NUM)
 327
 328 /* This is how to store into the string LABEL
 329    the symbol_ref name of an internal numbered label where
 330    PREFIX is the class of label and NUM is the number within the class.
 331    This is suitable for output with `assemble_name'.  */
 332
 333 #undef  ASM_GENERATE_INTERNAL_LABEL
 334 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 335   sprintf (LABEL, "*.L%s%d", PREFIX, NUM)
 336
 337 /* Define the names of various pseudo-ops used by the Sparc/svr4 assembler.
 338    ??? If ints are 64 bits then UNALIGNED_INT_ASM_OP (defined elsewhere) is
 339    misnamed.  These should all refer to explicit sizes (half/word/xword?),
 340    anything other than short/int/long/etc.  */
 341
 342 #define UNALIGNED_DOUBLE_INT_ASM_OP     ".uaxword"
 343
 344 /* DWARF bits.  */
 345
 346 /* Follow Irix 6 and not the Dwarf2 draft in using 64-bit offsets.
 347    Obviously the Dwarf2 folks havn't tried to actually build systems
 348    with their spec.  On a 64-bit system, only 64-bit relocs become
 349    RELATIVE relocations.  */
 350
 351 /* #define DWARF_OFFSET_SIZE PTR_SIZE */
 352 \f
 353 /* No weird SPARC variants on Linux */
 354 #undef TARGET_LIVE_G0
 355 #define TARGET_LIVE_G0                  0
 356 #undef TARGET_BROKEN_SAVERESTORE
 357 #define TARGET_BROKEN_SAVERESTORE       0
 358 \f
 359 #if TARGET_ARCH32
 360 /* Override MACHINE_STATE_{SAVE,RESTORE} because we have special
 361    traps available which can get and set the condition codes
 362    reliably.  */
 363 #undef MACHINE_STATE_SAVE
 364 #define MACHINE_STATE_SAVE(ID)                          \
 365   unsigned long int ms_flags, ms_saveret;               \
 366   asm volatile("ta      0x20\n\t"                       \
 367                "mov     %%g1, %0\n\t"                   \
 368                "mov     %%g2, %1\n\t"                   \
 369                : "=r" (ms_flags), "=r" (ms_saveret));
 370
 371 #undef MACHINE_STATE_RESTORE
 372 #define MACHINE_STATE_RESTORE(ID)                       \
 373   asm volatile("mov     %0, %%g1\n\t"                   \
 374                "mov     %1, %%g2\n\t"                   \
 375                "ta      0x21\n\t"                       \
 376                : /* no outputs */                       \
 377                : "r" (ms_flags), "r" (ms_saveret));
 378 #endif /* sparc32 */
 379
 380 /* A C statement (sans semicolon) to output an element in the table of
 381    global constructors.  */
 382 #undef ASM_OUTPUT_CONSTRUCTOR
 383 #define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME)                               \
 384   do {                                                                  \
 385     ctors_section ();                                                   \
 386     fprintf (FILE, "\t%s\t ", TARGET_ARCH64 ? ASM_LONGLONG : INT_ASM_OP); \
 387     assemble_name (FILE, NAME);                                         \
 388     fprintf (FILE, "\n");                                               \
 389   } while (0)
 390
 391 /* A C statement (sans semicolon) to output an element in the table of
 392    global destructors.  */
 393 #undef ASM_OUTPUT_DESTRUCTOR
 394 #define ASM_OUTPUT_DESTRUCTOR(FILE,NAME)                                \
 395   do {                                                                  \
 396     dtors_section ();                                                   \
 397     fprintf (FILE, "\t%s\t ", TARGET_ARCH64 ? ASM_LONGLONG : INT_ASM_OP); \
 398     assemble_name (FILE, NAME);                                         \
 399     fprintf (FILE, "\n");                                               \
 400   } while (0)