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