gcc/config/pa/pa64-hpux.h

   1 /* Definitions of target machine for GNU compiler, for HPs running
   2    HPUX using the 64bit runtime model.
   3    Copyright (C) 1999-2014 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC 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 3, or (at your option)
  10 any later version.
  11
  12 GCC 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 GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 /* We can debug dynamically linked executables on hpux11; we also
  22    want dereferencing of a NULL pointer to cause a SEGV.  Do not move
  23    the "+Accept TypeMismatch" switch.  We check for it in collect2
  24    to determine which init/fini is needed.  */
  25 #undef LINK_SPEC
  26 #if ((TARGET_DEFAULT | TARGET_CPU_DEFAULT) & MASK_GNU_LD)
  27 #define LINK_SPEC \
  28   "%{!shared:%{p:-L/lib/pa20_64/libp -L/usr/lib/pa20_64/libp %{!static:\
  29      %nwarning: consider linking with '-static' as system libraries with\n\
  30      %n  profiling support are only provided in archive format}}}\
  31    %{!shared:%{pg:-L/lib/pa20_64/libp -L/usr/lib/pa20_64/libp %{!static:\
  32      %nwarning: consider linking with '-static' as system libraries with\n\
  33      %n  profiling support are only provided in archive format}}}\
  34    %{!shared:%{!static:%{rdynamic:-E}}}\
  35    %{mhp-ld:+Accept TypeMismatch -z} %{mlinker-opt:-O}\
  36    %{!shared:-u main %{!nostdlib:%{!nodefaultlibs:-u __cxa_finalize}}}\
  37    %{static:-a archive} %{shared:%{mhp-ld:-b}%{!mhp-ld:-shared}}"
  38 #else
  39 #define LINK_SPEC \
  40   "%{!shared:%{p:-L/lib/pa20_64/libp -L/usr/lib/pa20_64/libp %{!static:\
  41      %nwarning: consider linking with '-static' as system libraries with\n\
  42      %n  profiling support are only provided in archive format}}}\
  43    %{!shared:%{pg:-L/lib/pa20_64/libp -L/usr/lib/pa20_64/libp %{!static:\
  44      %nwarning: consider linking with '-static' as system libraries with\n\
  45      %n  profiling support are only provided in archive format}}}\
  46    %{!shared:%{!static:%{rdynamic:-E}}}\
  47    %{!mgnu-ld:+Accept TypeMismatch -z} %{mlinker-opt:-O}\
  48    %{!shared:-u main %{!nostdlib:%{!nodefaultlibs:-u __cxa_finalize}}}\
  49    %{static:-a archive} %{shared:%{mgnu-ld:-shared}%{!mgnu-ld:-b}}"
  50 #endif
  51
  52 /* Profiling support is only provided in libc.a.  However, libprof and
  53    libgprof are only available in shared form on HP-UX 11.00.  We use
  54    the shared form if we are using the GNU linker or an archive form
  55    isn't available.  We also usually need to link with libdld and it's
  56    only available in shared form.  */
  57 #undef LIB_SPEC
  58 #if ((TARGET_DEFAULT | TARGET_CPU_DEFAULT) & MASK_GNU_LD)
  59 #define LIB_SPEC \
  60   "%{!shared:\
  61      %{!p:%{!pg:%{fopenmp|ftree-parallelize-loops=*:%{static:-a shared} -lrt\
  62                   %{static:-a archive}}\
  63             %{mt|pthread:-lpthread} -lc\
  64             %{static:%{!nolibdld:-a shared -ldld -a archive -lc}\
  65                 %{!mt:%{!pthread:-a shared -lc -a archive}}}}}\
  66      %{p:%{!pg:%{static:%{!mhp-ld:-a shared}%{mhp-ld:-a archive_shared}}\
  67            -lprof %{static:-a archive}\
  68            %{fopenmp|ftree-parallelize-loops=*:%{static:-a shared} -lrt\
  69              %{static:-a archive}}\
  70            %{mt|pthread:-lpthread} -lc\
  71            %{static:%{!nolibdld:-a shared -ldld -a archive -lc}\
  72                 %{!mt:%{!pthread:-a shared -lc -a archive}}}}}\
  73      %{pg:%{static:%{!mhp-ld:-a shared}%{mhp-ld:-a archive_shared}}\
  74        -lgprof %{static:-a archive}\
  75        %{fopenmp|ftree-parallelize-loops=*:%{static:-a shared} -lrt\
  76          %{static:-a archive}}\
  77        %{mt|pthread:-lpthread} -lc\
  78        %{static:%{!nolibdld:-a shared -ldld -a archive -lc}\
  79                 %{!mt:%{!pthread:-a shared -lc -a archive}}}}}\
  80    %{shared:%{mt|pthread:-lpthread}}"
  81 #else
  82 #define LIB_SPEC \
  83   "%{!shared:\
  84      %{!p:%{!pg:%{fopenmp|ftree-parallelize-loops=*:%{static:-a shared} -lrt\
  85                   %{static:-a archive}}\
  86             %{mt|pthread:-lpthread} -lc\
  87             %{static:%{!nolibdld:-a shared -ldld -a archive -lc}\
  88                 %{!mt:%{!pthread:-a shared -lc -a archive}}}}}\
  89      %{p:%{!pg:%{static:%{mgnu-ld:-a shared}%{!mgnu-ld:-a archive_shared}}\
  90            -lprof %{static:-a archive}\
  91            %{fopenmp|ftree-parallelize-loops=*:%{static:-a shared} -lrt\
  92              %{static:-a archive}}\
  93            %{mt|pthread:-lpthread} -lc\
  94            %{static:%{!nolibdld:-a shared -ldld -a archive -lc}\
  95                 %{!mt:%{!pthread:-a shared -lc -a archive}}}}}\
  96      %{pg:%{static:%{mgnu-ld:-a shared}%{!mgnu-ld:-a archive_shared}}\
  97        -lgprof %{static:-a archive}\
  98        %{fopenmp|ftree-parallelize-loops=*:%{static:-a shared} -lrt\
  99          %{static:-a archive}}\
 100        %{mt|pthread:-lpthread} -lc\
 101        %{static:%{!nolibdld:-a shared -ldld -a archive -lc}\
 102                 %{!mt:%{!pthread:-a shared -lc -a archive}}}}}\
 103    %{shared:%{mt|pthread:-lpthread}}"
 104 #endif
 105
 106 /* The libgcc_stub.a and milli.a libraries need to come last.  */
 107 #undef LINK_GCC_C_SEQUENCE_SPEC
 108 #define LINK_GCC_C_SEQUENCE_SPEC "\
 109   %G %L %G %{!nostdlib:%{!nodefaultlibs:%{!shared:-lgcc_stub}\
 110   milli.a%s}}"
 111
 112 /* Under hpux11, the normal location of the `ld' and `as' programs is the
 113    /usr/ccs/bin directory.  */
 114
 115 #ifndef CROSS_DIRECTORY_STRUCTURE
 116 #undef MD_EXEC_PREFIX
 117 #define MD_EXEC_PREFIX "/usr/ccs/bin"
 118 #endif
 119
 120 /* Default prefixes.  */
 121
 122 #undef STANDARD_STARTFILE_PREFIX_1
 123 #define STANDARD_STARTFILE_PREFIX_1 "/lib/pa20_64/"
 124
 125 #undef STANDARD_STARTFILE_PREFIX_2
 126 #define STANDARD_STARTFILE_PREFIX_2 "/usr/lib/pa20_64/"
 127
 128 /* Under hpux11 the normal location of the various pa20_64 *crt*.o files
 129    is the /usr/ccs/lib/pa20_64 directory.  Some files may also be in the
 130    /opt/langtools/lib/pa20_64 directory.  */
 131
 132 #ifndef CROSS_DIRECTORY_STRUCTURE
 133 #undef MD_STARTFILE_PREFIX
 134 #define MD_STARTFILE_PREFIX "/usr/ccs/lib/pa20_64/"
 135 #endif
 136
 137 #ifndef CROSS_DIRECTORY_STRUCTURE
 138 #undef MD_STARTFILE_PREFIX_1
 139 #define MD_STARTFILE_PREFIX_1 "/opt/langtools/lib/pa20_64/"
 140 #endif
 141
 142 /* This macro specifies the biggest alignment supported by the object
 143    file format of this machine.
 144
 145    The .align directive in the HP assembler allows alignments up to
 146    4096 bytes.  However, the maximum alignment of a global common symbol
 147    is 16 bytes using HP ld.  Unfortunately, this macro doesn't provide
 148    a method to check for common symbols.  */
 149 #undef MAX_OFILE_ALIGNMENT
 150 #define MAX_OFILE_ALIGNMENT 32768
 151
 152 /* Due to limitations in the target structure, it isn't currently possible
 153    to dynamically switch between the GNU and HP assemblers.  */
 154 #undef TARGET_GAS
 155
 156 /* Configure selects the standard ELFOS defines for use with GAS.  */
 157 #ifdef USING_ELFOS_H
 158
 159 /* We are using GAS.  */
 160 #define TARGET_GAS 1
 161
 162 #undef TARGET_ASM_FILE_START
 163 #define TARGET_ASM_FILE_START pa_hpux64_gas_file_start
 164
 165 /* This is how we output a null terminated string.  */
 166 #undef STRING_ASM_OP
 167 #define STRING_ASM_OP   "\t.stringz\t"
 168
 169 #define TEXT_SECTION_ASM_OP     "\t.text"
 170 #define DATA_SECTION_ASM_OP     "\t.data"
 171 #define BSS_SECTION_ASM_OP      "\t.section\t.bss"
 172
 173 #define JCR_SECTION_NAME        ".jcr"
 174
 175 #define HP_INIT_ARRAY_SECTION_ASM_OP    "\t.section\t.init"
 176 #define GNU_INIT_ARRAY_SECTION_ASM_OP   "\t.section\t.init_array"
 177 #define HP_FINI_ARRAY_SECTION_ASM_OP    "\t.section\t.fini"
 178 #define GNU_FINI_ARRAY_SECTION_ASM_OP   "\t.section\t.fini_array"
 179
 180 /* We need to override the following two macros defined in elfos.h since
 181    the .comm directive has a different syntax and it can't be used for
 182    local common symbols.  */
 183 #undef ASM_OUTPUT_ALIGNED_COMMON
 184 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN)              \
 185   pa_asm_output_aligned_common (FILE, NAME, SIZE, ALIGN)
 186
 187 #undef ASM_OUTPUT_ALIGNED_LOCAL
 188 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 189   pa_asm_output_aligned_local (FILE, NAME, SIZE, ALIGN)
 190
 191 /* The define in pa.h doesn't work with the alias attribute.  The
 192    default is ok with the following define for GLOBAL_ASM_OP.  */
 193 #undef TARGET_ASM_GLOBALIZE_LABEL
 194
 195 /* This is how we globalize a label.  */
 196 #define GLOBAL_ASM_OP   "\t.globl\t"
 197
 198 /* Hacked version from defaults.h that uses assemble_name_raw
 199    instead of assemble_name.  A symbol in a type directive that
 200    isn't otherwise referenced doesn't cause the symbol to be
 201    placed in the symbol table of the assembled object.  */
 202 #undef ASM_OUTPUT_TYPE_DIRECTIVE
 203 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE)           \
 204 do {                                                            \
 205   fputs (TYPE_ASM_OP, STREAM);                                  \
 206   assemble_name_raw (STREAM, NAME);                             \
 207   fputs (", ", STREAM);                                         \
 208   fprintf (STREAM, TYPE_OPERAND_FMT, TYPE);                     \
 209   putc ('\n', STREAM);                                          \
 210 } while (0)
 211
 212 /* Hacked version from elfos.h that doesn't output a label.  */
 213 #undef ASM_DECLARE_FUNCTION_NAME
 214 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)             \
 215 do {                                                            \
 216   ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function");           \
 217   ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL));                \
 218 } while (0)
 219
 220 /* The type of external references must be set correctly for the
 221    dynamic loader to work correctly.  This is equivalent to the
 222    HP assembler's .IMPORT directive but relates more directly to
 223    ELF object file types.  */
 224 #undef ASM_OUTPUT_EXTERNAL
 225 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME)                   \
 226   pa_hpux_asm_output_external ((FILE), (DECL), (NAME))
 227 #define ASM_OUTPUT_EXTERNAL_REAL(FILE, DECL, NAME)              \
 228 do {                                                            \
 229   if (FUNCTION_NAME_P (NAME))                                   \
 230     ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function");         \
 231   else                                                          \
 232     ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");           \
 233   default_elf_asm_output_external (FILE, DECL, NAME);           \
 234 } while (0)
 235
 236 /* We need set the type for external libcalls.  Also note that not all
 237    libcall names are passed to targetm.encode_section_info (e.g., __main).
 238    Thus, we also have to do the section encoding if it hasn't been done
 239    already.  */
 240 #undef ASM_OUTPUT_EXTERNAL_LIBCALL
 241 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN)                  \
 242 do {                                                            \
 243   if (!FUNCTION_NAME_P (XSTR (FUN, 0)))                         \
 244     pa_encode_label (FUN);                                      \
 245   ASM_OUTPUT_TYPE_DIRECTIVE (FILE, XSTR (FUN, 0), "function");  \
 246 } while (0)
 247
 248 /* We need to use the HP style for internal labels.  */
 249 #undef ASM_GENERATE_INTERNAL_LABEL
 250 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
 251   sprintf (LABEL, "*%c$%s%04ld", (PREFIX)[0], (PREFIX) + 1, (long)(NUM))
 252
 253 #else /* USING_ELFOS_H */
 254
 255 /* We are not using GAS.  */
 256 #define TARGET_GAS 0
 257
 258 /* HPUX 11 has the "new" HP assembler.  It's still lousy, but it's a whole
 259    lot better than the assembler shipped with older versions of hpux.
 260    However, it doesn't support weak symbols and is a bad fit with ELF.  */
 261 #undef NEW_HP_ASSEMBLER
 262 #define NEW_HP_ASSEMBLER 1
 263
 264 /* It looks like DWARF2 will be the easiest debug format to handle on this
 265    platform.  */
 266 #define DWARF2_DEBUGGING_INFO 1
 267 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 268
 269 /* This target uses the ELF object file format.  */
 270 #define OBJECT_FORMAT_ELF
 271
 272 #undef TARGET_ASM_FILE_START
 273 #define TARGET_ASM_FILE_START pa_hpux64_hpas_file_start
 274
 275 #undef TEXT_SECTION_ASM_OP
 276 #define TEXT_SECTION_ASM_OP             "\t.SUBSPA $CODE$\n"
 277 #undef READONLY_DATA_SECTION_ASM_OP
 278 #define READONLY_DATA_SECTION_ASM_OP    "\t.SUBSPA $LIT$\n"
 279 #undef DATA_SECTION_ASM_OP
 280 #define DATA_SECTION_ASM_OP             "\t.SUBSPA $DATA$\n"
 281 #undef BSS_SECTION_ASM_OP
 282 #define BSS_SECTION_ASM_OP              "\t.SUBSPA $BSS$\n"
 283
 284 /* We provide explicit defines for CTORS_SECTION_ASM_OP and
 285    DTORS_SECTION_ASM_OP since we don't yet have support for
 286    named sections with the HP assembler.  */
 287 #undef CTORS_SECTION_ASM_OP
 288 #define CTORS_SECTION_ASM_OP "\t.SUBSPA \\.ctors,QUAD=1,ALIGN=8,ACCESS=31"
 289 #undef DTORS_SECTION_ASM_OP
 290 #define DTORS_SECTION_ASM_OP "\t.SUBSPA \\.dtors,QUAD=1,ALIGN=8,ACCESS=31"
 291
 292 #define HP_INIT_ARRAY_SECTION_ASM_OP \
 293   "\t.SUBSPA \\.init,QUAD=1,ALIGN=8,ACCESS=31"
 294 #define GNU_INIT_ARRAY_SECTION_ASM_OP \
 295   "\t.SUBSPA \\.init_array,QUAD=1,ALIGN=8,ACCESS=31"
 296 #define HP_FINI_ARRAY_SECTION_ASM_OP \
 297   "\t.SUBSPA \\.fini,QUAD=1,ALIGN=8,ACCESS=31"
 298 #define GNU_FINI_ARRAY_SECTION_ASM_OP \
 299   "\t.SUBSPA \\.fini_array,QUAD=1,ALIGN=8,ACCESS=31"
 300
 301 #endif /* USING_ELFOS_H */
 302
 303 /* The following defines, used to run constructors and destructors with
 304    the SOM linker under HP-UX 11, are not needed.  */
 305 #undef HAS_INIT_SECTION
 306 #undef LD_INIT_SWITCH
 307 #undef LD_FINI_SWITCH
 308
 309 /* The following STARTFILE_SPEC and ENDFILE_SPEC defines provide the
 310    magic needed to run initializers and finalizers.  */
 311 #undef STARTFILE_SPEC
 312 #if TARGET_HPUX_11_31
 313 #define STARTFILE_SPEC \
 314   "%{!shared: %{!symbolic: crt0%O%s} \
 315      %{munix=95:unix95.o%s} %{munix=98:unix98.o%s} \
 316      %{!munix=93:%{!munix=95:%{!munix=98:unix2003%O%s}}}} \
 317      %{static:crtbeginT%O%s} \
 318    %{!static:%{!shared:crtbegin%O%s} %{shared:crtbeginS%O%s}}"
 319 #elif TARGET_HPUX_11_11
 320 #define STARTFILE_SPEC \
 321   "%{!shared: %{!symbolic: crt0%O%s} %{munix=95:unix95.o%s} \
 322      %{!munix=93:%{!munix=95:unix98%O%s}}} %{static:crtbeginT%O%s} \
 323    %{!static:%{!shared:crtbegin%O%s} %{shared:crtbeginS%O%s}}"
 324 #else
 325 #define STARTFILE_SPEC \
 326   "%{!shared: %{!symbolic: crt0%O%s} %{munix=95:unix95%O%s}} \
 327    %{static:crtbeginT%O%s} %{!static:%{!shared:crtbegin%O%s} \
 328    %{shared:crtbeginS%O%s}}"
 329 #endif
 330 #undef ENDFILE_SPEC
 331 #define ENDFILE_SPEC "%{!shared:crtend%O%s} %{shared:crtendS%O%s}"
 332
 333 /* Since HP uses the .init and .fini sections for array initializers
 334    and finalizers, we need different defines for INIT_SECTION_ASM_OP
 335    and FINI_SECTION_ASM_OP.  With the implementation adopted below,
 336    the sections are not actually used.  However, we still must provide
 337    defines to select the proper code path.  */
 338 #undef INIT_SECTION_ASM_OP
 339 #define INIT_SECTION_ASM_OP ""
 340 #undef FINI_SECTION_ASM_OP
 341 #define FINI_SECTION_ASM_OP
 342
 343 /* We are using array initializers and don't want calls in the INIT
 344    and FINI sections.  */
 345 #undef CRT_CALL_STATIC_FUNCTION
 346 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC)
 347
 348 /* The init_priority attribute is not supported with HP ld.  This could be
 349    supported if collect2 was used with LD_INIT_SWITCH.  Unfortunately, this
 350    approach doesn't work with GNU ld since HP-UX doesn't support DT_INIT,
 351    and therefore the -init and -fini GNU ld switches.  */
 352 #undef SUPPORTS_INIT_PRIORITY
 353 #define SUPPORTS_INIT_PRIORITY (TARGET_GNU_LD ? 1 : 0)
 354
 355 /* We use DTOR_LIST_BEGIN to carry a bunch of hacks to allow us to use
 356    the init and fini array sections with both the HP and GNU linkers.
 357    The linkers setup the required dynamic entries in the dynamic segment
 358    and the dynamic linker does the calls.  This approach avoids using
 359    collect2.
 360
 361    The first hack is to implement __do_global_ctors_aux in crtbegin as
 362    it needs to be the first entry in the init array so that it is called
 363    last.  HP got the order of the init array backwards.  The DT_INIT_ARRAY
 364    is supposed to be executed in the same order as the addresses appear in
 365    the array.  DT_FINI_ARRAY is supposed to be executed in the opposite
 366    order.
 367
 368    The second hack is a set of plabels to implement the effect of
 369    CRT_CALL_STATIC_FUNCTION.  HP-UX 11 only supports DI_INIT_ARRAY and
 370    DT_FINI_ARRAY and they put the arrays in .init and .fini, rather than
 371    in .init_array and .fini_array.  The standard defines for .init and
 372    .fini have the execute flag set.  So, the assembler has to be hacked
 373    to munge the standard flags for these sections to make them agree
 374    with what the HP linker expects.  With the GNU linker, we need to
 375    used the .init_array and .fini_array sections.  So, we set up for
 376    both just in case.  Once we have built the table, the linker does
 377    the rest of the work.
 378
 379    The order is significant.  Placing __do_global_ctors_aux first in
 380    the list, results in it being called last.  User specified initializers,
 381    either using the linker +init command or a plabel, run before the
 382    initializers specified here.  */
 383
 384 /* We need to add frame_dummy to the initializer list if EH_FRAME_SECTION_NAME
 385    or JCR_SECTION_NAME is defined.  */
 386 #if defined(EH_FRAME_SECTION_NAME) || defined(JCR_SECTION_NAME)
 387 #define PA_INIT_FRAME_DUMMY_ASM_OP ".dword P%frame_dummy"
 388 #else
 389 #define PA_INIT_FRAME_DUMMY_ASM_OP ""
 390 #endif
 391
 392 /* The following hack sets up the .init, .init_array, .fini and
 393    .fini_array sections.  */
 394 #define PA_CRTBEGIN_HACK \
 395 asm (TEXT_SECTION_ASM_OP);                                              \
 396 static void __attribute__((used))                                       \
 397 __do_global_ctors_aux (void)                                            \
 398 {                                                                       \
 399   func_ptr *p = __CTOR_LIST__;                                          \
 400   while (*(p + 1))                                                      \
 401     p++;                                                                \
 402   for (; *p != (func_ptr) -1; p--)                                      \
 403     (*p) ();                                                            \
 404 }                                                                       \
 405                                                                         \
 406 asm (HP_INIT_ARRAY_SECTION_ASM_OP);                                     \
 407 asm (".align 8");                                                       \
 408 asm (".dword P%__do_global_ctors_aux");                                 \
 409 asm (PA_INIT_FRAME_DUMMY_ASM_OP);                                       \
 410 asm (GNU_INIT_ARRAY_SECTION_ASM_OP);                                    \
 411 asm (".align 8");                                                       \
 412 asm (".dword P%__do_global_ctors_aux");                                 \
 413 asm (PA_INIT_FRAME_DUMMY_ASM_OP);                                       \
 414 asm (HP_FINI_ARRAY_SECTION_ASM_OP);                                     \
 415 asm (".align 8");                                                       \
 416 asm (".dword P%__do_global_dtors_aux");                                 \
 417 asm (GNU_FINI_ARRAY_SECTION_ASM_OP);                                    \
 418 asm (".align 8");                                                       \
 419 asm (".dword P%__do_global_dtors_aux")
 420
 421 /* The following two variants of DTOR_LIST_BEGIN are identical to those
 422    in crtstuff.c except for the addition of the above crtbegin hack.  */
 423 #ifdef DTORS_SECTION_ASM_OP
 424 #define DTOR_LIST_BEGIN \
 425 asm (DTORS_SECTION_ASM_OP);                                             \
 426 STATIC func_ptr __DTOR_LIST__[1]                                        \
 427   __attribute__ ((aligned(sizeof(func_ptr))))                           \
 428   = { (func_ptr) (-1) };                                                \
 429 PA_CRTBEGIN_HACK
 430 #else
 431 #define DTOR_LIST_BEGIN \
 432 STATIC func_ptr __DTOR_LIST__[1]                                        \
 433   __attribute__ ((section(".dtors"), aligned(sizeof(func_ptr))))        \
 434   = { (func_ptr) (-1) };                                                \
 435 PA_CRTBEGIN_HACK
 436 #endif
 437
 438 /* If using HP ld do not call pxdb.  Use size as a program that does nothing
 439    and returns 0.  /bin/true cannot be used because it is a script without
 440    an interpreter.  */
 441 #define INIT_ENVIRONMENT "LD_PXDB=/usr/ccs/bin/size"
 442
 443 /* The HPUX dynamic linker objects to undefined weak symbols, so do
 444    not use them in gthr-posix.h.  */
 445 #define GTHREAD_USE_WEAK 0
 446
 447 /* We don't want undefined weak references to __register_frame_info,
 448    __deregister_frame_info, _Jv_RegisterClasses and __cxa_finalize
 449    introduced by crtbegin.o.  The GNU linker only resolves weak
 450    references if they appear in a shared library.  Thus, it would be
 451    impossible to create a static executable if the symbols were weak.
 452    So, the best solution seems to be to make the symbols strong and
 453    provide an archive library of empty stub functions.  */
 454 #define TARGET_ATTRIBUTE_WEAK