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) 1999-2023 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 /* Under hpux11, the normal location of the `ld' and `as' programs is the
 107    /usr/ccs/bin directory.  */
 108
 109 #ifndef CROSS_DIRECTORY_STRUCTURE
 110 #undef MD_EXEC_PREFIX
 111 #define MD_EXEC_PREFIX "/usr/ccs/bin"
 112 #endif
 113
 114 /* Default prefixes.  */
 115
 116 #undef STANDARD_STARTFILE_PREFIX_1
 117 #define STANDARD_STARTFILE_PREFIX_1 "/lib/pa20_64/"
 118
 119 #undef STANDARD_STARTFILE_PREFIX_2
 120 #define STANDARD_STARTFILE_PREFIX_2 "/usr/lib/pa20_64/"
 121
 122 /* Under hpux11 the normal location of the various pa20_64 *crt*.o files
 123    is the /usr/ccs/lib/pa20_64 directory.  Some files may also be in the
 124    /opt/langtools/lib/pa20_64 directory.  */
 125
 126 #ifndef CROSS_DIRECTORY_STRUCTURE
 127 #undef MD_STARTFILE_PREFIX
 128 #define MD_STARTFILE_PREFIX "/usr/ccs/lib/pa20_64/"
 129 #endif
 130
 131 #ifndef CROSS_DIRECTORY_STRUCTURE
 132 #undef MD_STARTFILE_PREFIX_1
 133 #define MD_STARTFILE_PREFIX_1 "/opt/langtools/lib/pa20_64/"
 134 #endif
 135
 136 /* This macro specifies the biggest alignment supported by the object
 137    file format of this machine.
 138
 139    The .align directive in the HP assembler allows alignments up to
 140    4096 bytes.  However, the maximum alignment of a global common symbol
 141    is 16 bytes using HP ld.  Unfortunately, this macro doesn't provide
 142    a method to check for common symbols.  */
 143 #undef MAX_OFILE_ALIGNMENT
 144 #define MAX_OFILE_ALIGNMENT 32768
 145
 146 /* Due to limitations in the target structure, it isn't currently possible
 147    to dynamically switch between the GNU and HP assemblers.  */
 148 #undef TARGET_GAS
 149
 150 /* Configure selects the standard ELFOS defines for use with GAS.  */
 151 #ifdef USING_ELFOS_H
 152
 153 /* We are using GAS.  */
 154 #define TARGET_GAS 1
 155
 156 #undef TARGET_ASM_FILE_START
 157 #define TARGET_ASM_FILE_START pa_hpux64_gas_file_start
 158
 159 /* This is how we output a null terminated string.  */
 160 #undef STRING_ASM_OP
 161 #define STRING_ASM_OP   "\t.stringz\t"
 162
 163 #define TEXT_SECTION_ASM_OP     "\t.text"
 164 #define DATA_SECTION_ASM_OP     "\t.data"
 165 #define BSS_SECTION_ASM_OP      "\t.section\t.bss"
 166
 167 #define HP_INIT_ARRAY_SECTION_ASM_OP    "\t.section\t.init"
 168 #define GNU_INIT_ARRAY_SECTION_ASM_OP   "\t.section\t.init_array"
 169 #define HP_FINI_ARRAY_SECTION_ASM_OP    "\t.section\t.fini"
 170 #define GNU_FINI_ARRAY_SECTION_ASM_OP   "\t.section\t.fini_array"
 171
 172 /* We need to override the following two macros defined in elfos.h since
 173    the .comm directive has a different syntax and it can't be used for
 174    local common symbols.  */
 175 #undef ASM_OUTPUT_ALIGNED_COMMON
 176 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN)              \
 177   pa_asm_output_aligned_common (FILE, NAME, SIZE, ALIGN)
 178
 179 #undef ASM_OUTPUT_ALIGNED_LOCAL
 180 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 181   pa_asm_output_aligned_local (FILE, NAME, SIZE, ALIGN)
 182
 183 /* The define in pa.h doesn't work with the alias attribute.  The
 184    default is ok with the following define for GLOBAL_ASM_OP.  */
 185 #undef TARGET_ASM_GLOBALIZE_LABEL
 186
 187 /* This is how we globalize a label.  */
 188 #define GLOBAL_ASM_OP   "\t.globl\t"
 189
 190 /* Hacked version from defaults.h that uses assemble_name_raw
 191    instead of assemble_name.  A symbol in a type directive that
 192    isn't otherwise referenced doesn't cause the symbol to be
 193    placed in the symbol table of the assembled object.  */
 194 #undef ASM_OUTPUT_TYPE_DIRECTIVE
 195 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE)           \
 196 do {                                                            \
 197   fputs (TYPE_ASM_OP, STREAM);                                  \
 198   assemble_name_raw (STREAM, NAME);                             \
 199   fputs (", ", STREAM);                                         \
 200   fprintf (STREAM, TYPE_OPERAND_FMT, TYPE);                     \
 201   putc ('\n', STREAM);                                          \
 202 } while (0)
 203
 204 /* Hacked version from elfos.h that doesn't output a label.  */
 205 #undef ASM_DECLARE_FUNCTION_NAME
 206 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)             \
 207 do {                                                            \
 208   ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function");           \
 209   ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL));                \
 210 } while (0)
 211
 212 /* The type of external references must be set correctly for the
 213    dynamic loader to work correctly.  This is equivalent to the
 214    HP assembler's .IMPORT directive but relates more directly to
 215    ELF object file types.  */
 216 #undef ASM_OUTPUT_EXTERNAL
 217 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME)                   \
 218   pa_hpux_asm_output_external ((FILE), (DECL), (NAME))
 219 #define ASM_OUTPUT_EXTERNAL_REAL(FILE, DECL, NAME)              \
 220 do {                                                            \
 221   if (FUNCTION_NAME_P (NAME))                                   \
 222     ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function");         \
 223   else                                                          \
 224     ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");           \
 225   default_elf_asm_output_external (FILE, DECL, NAME);           \
 226 } while (0)
 227
 228 /* We need set the type for external libcalls.  Also note that not all
 229    libcall names are passed to targetm.encode_section_info (e.g., __main).
 230    Thus, we also have to do the section encoding if it hasn't been done
 231    already.  */
 232 #undef ASM_OUTPUT_EXTERNAL_LIBCALL
 233 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN)                  \
 234 do {                                                            \
 235   if (!FUNCTION_NAME_P (XSTR (FUN, 0)))                         \
 236     pa_encode_label (FUN);                                      \
 237   ASM_OUTPUT_TYPE_DIRECTIVE (FILE, XSTR (FUN, 0), "function");  \
 238 } while (0)
 239
 240 /* We need to use the HP style for internal labels.  */
 241 #undef ASM_GENERATE_INTERNAL_LABEL
 242 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM)         \
 243   do                                                            \
 244     {                                                           \
 245       char *__p;                                                \
 246       (LABEL)[0] = '*';                                         \
 247       (LABEL)[1] = (PREFIX)[0];                                 \
 248       (LABEL)[2] = '$';                                         \
 249       __p = stpcpy (&(LABEL)[3], &(PREFIX)[1]);                 \
 250       sprint_ul (__p, (unsigned long) (NUM));                   \
 251     }                                                           \
 252   while (0)
 253
 254
 255 #else /* USING_ELFOS_H */
 256
 257 /* We are not using GAS.  */
 258 #define TARGET_GAS 0
 259
 260 /* HPUX 11 has the "new" HP assembler.  It's still lousy, but it's a whole
 261    lot better than the assembler shipped with older versions of hpux.
 262    However, it doesn't support weak symbols and is a bad fit with ELF.  */
 263 #undef NEW_HP_ASSEMBLER
 264 #define NEW_HP_ASSEMBLER 1
 265
 266 /* It looks like DWARF2 will be the easiest debug format to handle on this
 267    platform.  */
 268 #define DWARF2_DEBUGGING_INFO 1
 269
 270 /* This target uses the ELF object file format.  */
 271 #define OBJECT_FORMAT_ELF
 272
 273 #undef TARGET_ASM_FILE_START
 274 #define TARGET_ASM_FILE_START pa_hpux64_hpas_file_start
 275
 276 #undef TEXT_SECTION_ASM_OP
 277 #define TEXT_SECTION_ASM_OP             "\t.SUBSPA $CODE$\n"
 278 #undef READONLY_DATA_SECTION_ASM_OP
 279 #define READONLY_DATA_SECTION_ASM_OP    "\t.SUBSPA $LIT$\n"
 280 #undef DATA_SECTION_ASM_OP
 281 #define DATA_SECTION_ASM_OP             "\t.SUBSPA $DATA$\n"
 282 #undef BSS_SECTION_ASM_OP
 283 #define BSS_SECTION_ASM_OP              "\t.SUBSPA $BSS$\n"
 284
 285 /* We provide explicit defines for CTORS_SECTION_ASM_OP and
 286    DTORS_SECTION_ASM_OP since we don't yet have support for
 287    named sections with the HP assembler.  */
 288 #undef CTORS_SECTION_ASM_OP
 289 #define CTORS_SECTION_ASM_OP "\t.SUBSPA \\.ctors,QUAD=1,ALIGN=8,ACCESS=31"
 290 #undef DTORS_SECTION_ASM_OP
 291 #define DTORS_SECTION_ASM_OP "\t.SUBSPA \\.dtors,QUAD=1,ALIGN=8,ACCESS=31"
 292
 293 #define HP_INIT_ARRAY_SECTION_ASM_OP \
 294   "\t.SUBSPA \\.init,QUAD=1,ALIGN=8,ACCESS=31"
 295 #define GNU_INIT_ARRAY_SECTION_ASM_OP \
 296   "\t.SUBSPA \\.init_array,QUAD=1,ALIGN=8,ACCESS=31"
 297 #define HP_FINI_ARRAY_SECTION_ASM_OP \
 298   "\t.SUBSPA \\.fini,QUAD=1,ALIGN=8,ACCESS=31"
 299 #define GNU_FINI_ARRAY_SECTION_ASM_OP \
 300   "\t.SUBSPA \\.fini_array,QUAD=1,ALIGN=8,ACCESS=31"
 301
 302 #endif /* USING_ELFOS_H */
 303
 304 /* The following defines, used to run constructors and destructors with
 305    the SOM linker under HP-UX 11, are not needed.  */
 306 #undef HAS_INIT_SECTION
 307 #undef LD_INIT_SWITCH
 308 #undef LD_FINI_SWITCH
 309
 310 /* The following STARTFILE_SPEC and ENDFILE_SPEC defines provide the
 311    magic needed to run initializers and finalizers.  */
 312 #undef STARTFILE_SPEC
 313 #if TARGET_HPUX_11_31
 314 #define STARTFILE_SPEC \
 315   "%{!shared: %{!symbolic: crt0%O%s} \
 316      %{munix=95:unix95.o%s} %{munix=98:unix98.o%s} \
 317      %{!munix=93:%{!munix=95:%{!munix=98:unix2003%O%s}}}} \
 318      %{static:crtbeginT%O%s} \
 319    %{!static:%{!shared:crtbegin%O%s} %{shared:crtbeginS%O%s}}"
 320 #elif TARGET_HPUX_11_11
 321 #define STARTFILE_SPEC \
 322   "%{!shared: %{!symbolic: crt0%O%s} %{munix=95:unix95.o%s} \
 323      %{!munix=93:%{!munix=95:unix98%O%s}}} %{static:crtbeginT%O%s} \
 324    %{!static:%{!shared:crtbegin%O%s} %{shared:crtbeginS%O%s}}"
 325 #else
 326 #define STARTFILE_SPEC \
 327   "%{!shared: %{!symbolic: crt0%O%s} %{munix=95:unix95%O%s}} \
 328    %{static:crtbeginT%O%s} %{!static:%{!shared:crtbegin%O%s} \
 329    %{shared:crtbeginS%O%s}}"
 330 #endif
 331
 332 /* The libgcc_stub.a and milli.a libraries must come last.  We need
 333    to link with these libraries whenever start files are needed.  */
 334 #undef ENDFILE_SPEC
 335 #define ENDFILE_SPEC \
 336   "%{!shared:crtend%O%s libgcc_stub.a%s} %{shared:crtendS%O%s} milli.a%s"
 337
 338 /* Since HP uses the .init and .fini sections for array initializers
 339    and finalizers, we need different defines for INIT_SECTION_ASM_OP
 340    and FINI_SECTION_ASM_OP.  With the implementation adopted below,
 341    the sections are not actually used.  However, we still must provide
 342    defines to select the proper code path.  */
 343 #undef INIT_SECTION_ASM_OP
 344 #define INIT_SECTION_ASM_OP ""
 345 #undef FINI_SECTION_ASM_OP
 346 #define FINI_SECTION_ASM_OP ""
 347
 348 /* We are using array initializers and don't want calls in the INIT
 349    and FINI sections.  */
 350 #undef CRT_CALL_STATIC_FUNCTION
 351 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC)
 352
 353 /* The init_priority attribute is not supported with HP ld.  This could be
 354    supported if collect2 was used with LD_INIT_SWITCH.  Unfortunately, this
 355    approach doesn't work with GNU ld since HP-UX doesn't support DT_INIT,
 356    and therefore the -init and -fini GNU ld switches.  */
 357 #undef SUPPORTS_INIT_PRIORITY
 358 #define SUPPORTS_INIT_PRIORITY (TARGET_GNU_LD ? 1 : 0)
 359
 360 /* If using HP ld do not call pxdb.  Use size as a program that does nothing
 361    and returns 0.  /bin/true cannot be used because it is a script without
 362    an interpreter.  */
 363 #define INIT_ENVIRONMENT "LD_PXDB=/usr/ccs/bin/size"
 364
 365 /* The HPUX dynamic linker objects to undefined weak symbols, so do
 366    not use them in gthr-posix.h.  */
 367 #define GTHREAD_USE_WEAK 0
 368
 369 /* Support attribute weak.  However, the GNU linker only resolves weak
 370    references if they appear in a shared library.  Thus, it is impossible
 371    to create a static executable containing weak symbols.  This is a problem
 372    for the various crt files in libgcc.  We don't want undefined weak
 373    references to __register_frame_info, __deregister_frame_info and
 374    __cxa_finalize introduced by crtbegin.o.  So, we provide an archive
 375    library of empty stub functions to resolve these symbols.  */
 376 #define TARGET_ATTRIBUTE_WEAK