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) 1999-2018 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:%{fopenacc|fopenmp|%:gt(%{ftree-parallelize-loops=*:%*} 1):\
  62                   %{static:-a shared} -lrt %{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            %{fopenacc|fopenmp|%:gt(%{ftree-parallelize-loops=*:%*} 1):\
  69              %{static:-a shared} -lrt %{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        %{fopenacc|fopenmp|%:gt(%{ftree-parallelize-loops=*:%*} 1):\
  76          %{static:-a shared} -lrt %{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:%{fopenacc|fopenmp|%:gt(%{ftree-parallelize-loops=*:%*} 1):\
  85                   %{static:-a shared} -lrt %{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            %{fopenacc|fopenmp|%:gt(%{ftree-parallelize-loops=*:%*} 1):\
  92              %{static:-a shared} -lrt %{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        %{fopenacc|fopenmp|%:gt(%{ftree-parallelize-loops=*:%*} 1):\
  99          %{static:-a shared} -lrt %{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 %{!nolibc:%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 HP_INIT_ARRAY_SECTION_ASM_OP    "\t.section\t.init"
 174 #define GNU_INIT_ARRAY_SECTION_ASM_OP   "\t.section\t.init_array"
 175 #define HP_FINI_ARRAY_SECTION_ASM_OP    "\t.section\t.fini"
 176 #define GNU_FINI_ARRAY_SECTION_ASM_OP   "\t.section\t.fini_array"
 177
 178 /* We need to override the following two macros defined in elfos.h since
 179    the .comm directive has a different syntax and it can't be used for
 180    local common symbols.  */
 181 #undef ASM_OUTPUT_ALIGNED_COMMON
 182 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN)              \
 183   pa_asm_output_aligned_common (FILE, NAME, SIZE, ALIGN)
 184
 185 #undef ASM_OUTPUT_ALIGNED_LOCAL
 186 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 187   pa_asm_output_aligned_local (FILE, NAME, SIZE, ALIGN)
 188
 189 /* The define in pa.h doesn't work with the alias attribute.  The
 190    default is ok with the following define for GLOBAL_ASM_OP.  */
 191 #undef TARGET_ASM_GLOBALIZE_LABEL
 192
 193 /* This is how we globalize a label.  */
 194 #define GLOBAL_ASM_OP   "\t.globl\t"
 195
 196 /* Hacked version from defaults.h that uses assemble_name_raw
 197    instead of assemble_name.  A symbol in a type directive that
 198    isn't otherwise referenced doesn't cause the symbol to be
 199    placed in the symbol table of the assembled object.  */
 200 #undef ASM_OUTPUT_TYPE_DIRECTIVE
 201 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE)           \
 202 do {                                                            \
 203   fputs (TYPE_ASM_OP, STREAM);                                  \
 204   assemble_name_raw (STREAM, NAME);                             \
 205   fputs (", ", STREAM);                                         \
 206   fprintf (STREAM, TYPE_OPERAND_FMT, TYPE);                     \
 207   putc ('\n', STREAM);                                          \
 208 } while (0)
 209
 210 /* Hacked version from elfos.h that doesn't output a label.  */
 211 #undef ASM_DECLARE_FUNCTION_NAME
 212 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)             \
 213 do {                                                            \
 214   ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function");           \
 215   ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL));                \
 216 } while (0)
 217
 218 /* The type of external references must be set correctly for the
 219    dynamic loader to work correctly.  This is equivalent to the
 220    HP assembler's .IMPORT directive but relates more directly to
 221    ELF object file types.  */
 222 #undef ASM_OUTPUT_EXTERNAL
 223 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME)                   \
 224   pa_hpux_asm_output_external ((FILE), (DECL), (NAME))
 225 #define ASM_OUTPUT_EXTERNAL_REAL(FILE, DECL, NAME)              \
 226 do {                                                            \
 227   if (FUNCTION_NAME_P (NAME))                                   \
 228     ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function");         \
 229   else                                                          \
 230     ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");           \
 231   default_elf_asm_output_external (FILE, DECL, NAME);           \
 232 } while (0)
 233
 234 /* We need set the type for external libcalls.  Also note that not all
 235    libcall names are passed to targetm.encode_section_info (e.g., __main).
 236    Thus, we also have to do the section encoding if it hasn't been done
 237    already.  */
 238 #undef ASM_OUTPUT_EXTERNAL_LIBCALL
 239 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN)                  \
 240 do {                                                            \
 241   if (!FUNCTION_NAME_P (XSTR (FUN, 0)))                         \
 242     pa_encode_label (FUN);                                      \
 243   ASM_OUTPUT_TYPE_DIRECTIVE (FILE, XSTR (FUN, 0), "function");  \
 244 } while (0)
 245
 246 /* We need to use the HP style for internal labels.  */
 247 #undef ASM_GENERATE_INTERNAL_LABEL
 248 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM)         \
 249   do                                                            \
 250     {                                                           \
 251       char *__p;                                                \
 252       (LABEL)[0] = '*';                                         \
 253       (LABEL)[1] = (PREFIX)[0];                                 \
 254       (LABEL)[2] = '$';                                         \
 255       __p = stpcpy (&(LABEL)[3], &(PREFIX)[1]);                 \
 256       sprint_ul (__p, (unsigned long) (NUM));                   \
 257     }                                                           \
 258   while (0)
 259
 260
 261 #else /* USING_ELFOS_H */
 262
 263 /* We are not using GAS.  */
 264 #define TARGET_GAS 0
 265
 266 /* HPUX 11 has the "new" HP assembler.  It's still lousy, but it's a whole
 267    lot better than the assembler shipped with older versions of hpux.
 268    However, it doesn't support weak symbols and is a bad fit with ELF.  */
 269 #undef NEW_HP_ASSEMBLER
 270 #define NEW_HP_ASSEMBLER 1
 271
 272 /* It looks like DWARF2 will be the easiest debug format to handle on this
 273    platform.  */
 274 #define DWARF2_DEBUGGING_INFO 1
 275 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 276
 277 /* This target uses the ELF object file format.  */
 278 #define OBJECT_FORMAT_ELF
 279
 280 #undef TARGET_ASM_FILE_START
 281 #define TARGET_ASM_FILE_START pa_hpux64_hpas_file_start
 282
 283 #undef TEXT_SECTION_ASM_OP
 284 #define TEXT_SECTION_ASM_OP             "\t.SUBSPA $CODE$\n"
 285 #undef READONLY_DATA_SECTION_ASM_OP
 286 #define READONLY_DATA_SECTION_ASM_OP    "\t.SUBSPA $LIT$\n"
 287 #undef DATA_SECTION_ASM_OP
 288 #define DATA_SECTION_ASM_OP             "\t.SUBSPA $DATA$\n"
 289 #undef BSS_SECTION_ASM_OP
 290 #define BSS_SECTION_ASM_OP              "\t.SUBSPA $BSS$\n"
 291
 292 /* We provide explicit defines for CTORS_SECTION_ASM_OP and
 293    DTORS_SECTION_ASM_OP since we don't yet have support for
 294    named sections with the HP assembler.  */
 295 #undef CTORS_SECTION_ASM_OP
 296 #define CTORS_SECTION_ASM_OP "\t.SUBSPA \\.ctors,QUAD=1,ALIGN=8,ACCESS=31"
 297 #undef DTORS_SECTION_ASM_OP
 298 #define DTORS_SECTION_ASM_OP "\t.SUBSPA \\.dtors,QUAD=1,ALIGN=8,ACCESS=31"
 299
 300 #define HP_INIT_ARRAY_SECTION_ASM_OP \
 301   "\t.SUBSPA \\.init,QUAD=1,ALIGN=8,ACCESS=31"
 302 #define GNU_INIT_ARRAY_SECTION_ASM_OP \
 303   "\t.SUBSPA \\.init_array,QUAD=1,ALIGN=8,ACCESS=31"
 304 #define HP_FINI_ARRAY_SECTION_ASM_OP \
 305   "\t.SUBSPA \\.fini,QUAD=1,ALIGN=8,ACCESS=31"
 306 #define GNU_FINI_ARRAY_SECTION_ASM_OP \
 307   "\t.SUBSPA \\.fini_array,QUAD=1,ALIGN=8,ACCESS=31"
 308
 309 #endif /* USING_ELFOS_H */
 310
 311 /* The following defines, used to run constructors and destructors with
 312    the SOM linker under HP-UX 11, are not needed.  */
 313 #undef HAS_INIT_SECTION
 314 #undef LD_INIT_SWITCH
 315 #undef LD_FINI_SWITCH
 316
 317 /* The following STARTFILE_SPEC and ENDFILE_SPEC defines provide the
 318    magic needed to run initializers and finalizers.  */
 319 #undef STARTFILE_SPEC
 320 #if TARGET_HPUX_11_31
 321 #define STARTFILE_SPEC \
 322   "%{!shared: %{!symbolic: crt0%O%s} \
 323      %{munix=95:unix95.o%s} %{munix=98:unix98.o%s} \
 324      %{!munix=93:%{!munix=95:%{!munix=98:unix2003%O%s}}}} \
 325      %{static:crtbeginT%O%s} \
 326    %{!static:%{!shared:crtbegin%O%s} %{shared:crtbeginS%O%s}}"
 327 #elif TARGET_HPUX_11_11
 328 #define STARTFILE_SPEC \
 329   "%{!shared: %{!symbolic: crt0%O%s} %{munix=95:unix95.o%s} \
 330      %{!munix=93:%{!munix=95:unix98%O%s}}} %{static:crtbeginT%O%s} \
 331    %{!static:%{!shared:crtbegin%O%s} %{shared:crtbeginS%O%s}}"
 332 #else
 333 #define STARTFILE_SPEC \
 334   "%{!shared: %{!symbolic: crt0%O%s} %{munix=95:unix95%O%s}} \
 335    %{static:crtbeginT%O%s} %{!static:%{!shared:crtbegin%O%s} \
 336    %{shared:crtbeginS%O%s}}"
 337 #endif
 338 #undef ENDFILE_SPEC
 339 #define ENDFILE_SPEC "%{!shared:crtend%O%s} %{shared:crtendS%O%s}"
 340
 341 /* Since HP uses the .init and .fini sections for array initializers
 342    and finalizers, we need different defines for INIT_SECTION_ASM_OP
 343    and FINI_SECTION_ASM_OP.  With the implementation adopted below,
 344    the sections are not actually used.  However, we still must provide
 345    defines to select the proper code path.  */
 346 #undef INIT_SECTION_ASM_OP
 347 #define INIT_SECTION_ASM_OP ""
 348 #undef FINI_SECTION_ASM_OP
 349 #define FINI_SECTION_ASM_OP ""
 350
 351 /* We are using array initializers and don't want calls in the INIT
 352    and FINI sections.  */
 353 #undef CRT_CALL_STATIC_FUNCTION
 354 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC)
 355
 356 /* The init_priority attribute is not supported with HP ld.  This could be
 357    supported if collect2 was used with LD_INIT_SWITCH.  Unfortunately, this
 358    approach doesn't work with GNU ld since HP-UX doesn't support DT_INIT,
 359    and therefore the -init and -fini GNU ld switches.  */
 360 #undef SUPPORTS_INIT_PRIORITY
 361 #define SUPPORTS_INIT_PRIORITY (TARGET_GNU_LD ? 1 : 0)
 362
 363 /* If using HP ld do not call pxdb.  Use size as a program that does nothing
 364    and returns 0.  /bin/true cannot be used because it is a script without
 365    an interpreter.  */
 366 #define INIT_ENVIRONMENT "LD_PXDB=/usr/ccs/bin/size"
 367
 368 /* The HPUX dynamic linker objects to undefined weak symbols, so do
 369    not use them in gthr-posix.h.  */
 370 #define GTHREAD_USE_WEAK 0
 371
 372 /* Support attribute weak.  However, the GNU linker only resolves weak
 373    references if they appear in a shared library.  Thus, it is impossible
 374    to create a static executable containing weak symbols.  This is a problem
 375    for the various crt files in libgcc.  We don't want undefined weak
 376    references to __register_frame_info, __deregister_frame_info and
 377    __cxa_finalize introduced by crtbegin.o.  So, we provide an archive
 378    library of empty stub functions to resolve these symbols.  */
 379 #define TARGET_ATTRIBUTE_WEAK