437 lines
17 KiB
C
437 lines
17 KiB
C
/* Definitions of target machine for GNU compiler, for HPs running
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HPUX using the 64bit runtime model.
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Copyright (C) 1999, 2000, 2001, 2002, 2004, 2005, 2007, 2008
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Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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/* We can debug dynamically linked executables on hpux11; we also
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want dereferencing of a NULL pointer to cause a SEGV. Do not move
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the "+Accept TypeMismatch" switch. We check for it in collect2
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to determine which init/fini is needed. */
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#undef LINK_SPEC
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#if ((TARGET_DEFAULT | TARGET_CPU_DEFAULT) & MASK_GNU_LD)
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#define LINK_SPEC \
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"%{!shared:%{p:-L/lib/pa20_64/libp -L/usr/lib/pa20_64/libp %{!static:\
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%nWarning: consider linking with `-static' as system libraries with\n\
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%n profiling support are only provided in archive format}}}\
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%{!shared:%{pg:-L/lib/pa20_64/libp -L/usr/lib/pa20_64/libp %{!static:\
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%nWarning: consider linking with `-static' as system libraries with\n\
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%n profiling support are only provided in archive format}}}\
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%{!shared:%{!static:%{rdynamic:-E}}}\
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%{mhp-ld:+Accept TypeMismatch -z} %{mlinker-opt:-O}\
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%{!shared:-u main %{!nostdlib:%{!nodefaultlibs:-u __cxa_finalize}}}\
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%{static:-a archive} %{shared:%{mhp-ld:-b}%{!mhp-ld:-shared}}"
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#else
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#define LINK_SPEC \
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"%{!shared:%{p:-L/lib/pa20_64/libp -L/usr/lib/pa20_64/libp %{!static:\
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%nWarning: consider linking with `-static' as system libraries with\n\
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%n profiling support are only provided in archive format}}}\
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%{!shared:%{pg:-L/lib/pa20_64/libp -L/usr/lib/pa20_64/libp %{!static:\
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%nWarning: consider linking with `-static' as system libraries with\n\
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%n profiling support are only provided in archive format}}}\
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%{!shared:%{!static:%{rdynamic:-E}}}\
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%{!mgnu-ld:+Accept TypeMismatch -z} %{mlinker-opt:-O}\
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%{!shared:-u main %{!nostdlib:%{!nodefaultlibs:-u __cxa_finalize}}}\
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%{static:-a archive} %{shared:%{mgnu-ld:-shared}%{!mgnu-ld:-b}}"
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#endif
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/* Profiling support is only provided in libc.a. However, libprof and
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libgprof are only available in shared form on HP-UX 11.00. We use
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the shared form if we are using the GNU linker or an archive form
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isn't available. We also usually need to link with libdld and it's
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only available in shared form. */
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#undef LIB_SPEC
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#if ((TARGET_DEFAULT | TARGET_CPU_DEFAULT) & MASK_GNU_LD)
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#define LIB_SPEC \
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"%{!shared:\
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%{!p:%{!pg:%{static|mt|pthread:%{fopenmp:%{static:-a shared} -lrt\
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%{static:-a archive}} -lpthread} -lc\
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%{static:%{!nolibdld:-a shared -ldld -a archive -lc}}}}\
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%{p:%{!pg:%{static:%{!mhp-ld:-a shared}%{mhp-ld:-a archive_shared}}\
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-lprof %{static:-a archive}\
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%{static|mt|pthread:%{fopenmp:%{static:-a shared} -lrt\
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%{static:-a archive}} -lpthread} -lc\
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%{static:%{!nolibdld:-a shared -ldld -a archive -lc}}}}\
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%{pg:%{static:%{!mhp-ld:-a shared}%{mhp-ld:-a archive_shared}}\
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-lgprof %{static:-a archive}\
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%{static|mt|pthread:%{fopenmp:%{static:-a shared} -lrt\
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%{static:-a archive}} -lpthread} -lc\
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%{static:%{!nolibdld:-a shared -ldld -a archive -lc}}}}\
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%{shared:%{mt|pthread:-lpthread}}"
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#else
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#define LIB_SPEC \
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"%{!shared:\
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%{!p:%{!pg:%{static|mt|pthread:%{fopenmp:%{static:-a shared} -lrt\
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%{static:-a archive}} -lpthread} -lc\
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%{static:%{!nolibdld:-a shared -ldld -a archive -lc}}}}\
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%{p:%{!pg:%{static:%{mgnu-ld:-a shared}%{!mgnu-ld:-a archive_shared}}\
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-lprof %{static:-a archive}\
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%{static|mt|pthread:%{fopenmp:%{static:-a shared} -lrt\
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%{static:-a archive}} -lpthread} -lc\
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%{static:%{!nolibdld:-a shared -ldld -a archive -lc}}}}\
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%{pg:%{static:%{mgnu-ld:-a shared}%{!mgnu-ld:-a archive_shared}}\
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-lgprof %{static:-a archive}\
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%{static|mt|pthread:%{fopenmp:%{static:-a shared} -lrt\
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%{static:-a archive}} -lpthread} -lc\
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%{static:%{!nolibdld:-a shared -ldld -a archive -lc}}}}\
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%{shared:%{mt|pthread:-lpthread}}"
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#endif
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/* The libgcc_stub.a and milli.a libraries need to come last. */
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#undef LINK_GCC_C_SEQUENCE_SPEC
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#define LINK_GCC_C_SEQUENCE_SPEC "\
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%G %L %G %{!nostdlib:%{!nodefaultlibs:%{!shared:-lgcc_stub}\
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milli.a%s}}"
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/* Under hpux11, the normal location of the `ld' and `as' programs is the
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/usr/ccs/bin directory. */
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#ifndef CROSS_DIRECTORY_STRUCTURE
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#undef MD_EXEC_PREFIX
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#define MD_EXEC_PREFIX "/usr/ccs/bin"
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#endif
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/* Default prefixes. */
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#undef STANDARD_STARTFILE_PREFIX_1
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#define STANDARD_STARTFILE_PREFIX_1 "/lib/pa20_64/"
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#undef STANDARD_STARTFILE_PREFIX_2
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#define STANDARD_STARTFILE_PREFIX_2 "/usr/lib/pa20_64/"
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/* Under hpux11 the normal location of the various pa20_64 *crt*.o files
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is the /usr/ccs/lib/pa20_64 directory. Some files may also be in the
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/opt/langtools/lib/pa20_64 directory. */
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#ifndef CROSS_DIRECTORY_STRUCTURE
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#undef MD_STARTFILE_PREFIX
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#define MD_STARTFILE_PREFIX "/usr/ccs/lib/pa20_64/"
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#endif
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#ifndef CROSS_DIRECTORY_STRUCTURE
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#undef MD_STARTFILE_PREFIX_1
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#define MD_STARTFILE_PREFIX_1 "/opt/langtools/lib/pa20_64/"
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#endif
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/* This macro specifies the biggest alignment supported by the object
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file format of this machine.
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The .align directive in the HP assembler allows alignments up to
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4096 bytes. However, the maximum alignment of a global common symbol
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is 16 bytes using HP ld. Unfortunately, this macro doesn't provide
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a method to check for common symbols. */
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#undef MAX_OFILE_ALIGNMENT
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#define MAX_OFILE_ALIGNMENT 32768
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/* Due to limitations in the target structure, it isn't currently possible
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to dynamically switch between the GNU and HP assemblers. */
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#undef TARGET_GAS
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/* Configure selects the standard ELFOS defines for use with GAS. */
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#ifdef USING_ELFOS_H
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/* We are using GAS. */
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#define TARGET_GAS 1
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#undef TARGET_ASM_FILE_START
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#define TARGET_ASM_FILE_START pa_hpux64_gas_file_start
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/* This is how we output a null terminated string. */
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#undef STRING_ASM_OP
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#define STRING_ASM_OP "\t.stringz\t"
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#define TEXT_SECTION_ASM_OP "\t.text"
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#define DATA_SECTION_ASM_OP "\t.data"
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#define BSS_SECTION_ASM_OP "\t.section\t.bss"
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#define JCR_SECTION_NAME ".jcr"
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#define HP_INIT_ARRAY_SECTION_ASM_OP "\t.section\t.init"
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#define GNU_INIT_ARRAY_SECTION_ASM_OP "\t.section\t.init_array"
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#define HP_FINI_ARRAY_SECTION_ASM_OP "\t.section\t.fini"
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#define GNU_FINI_ARRAY_SECTION_ASM_OP "\t.section\t.fini_array"
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/* We need to override the following two macros defined in elfos.h since
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the .comm directive has a different syntax and it can't be used for
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local common symbols. */
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#undef ASM_OUTPUT_ALIGNED_COMMON
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#define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
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pa_asm_output_aligned_common (FILE, NAME, SIZE, ALIGN)
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#undef ASM_OUTPUT_ALIGNED_LOCAL
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#define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
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pa_asm_output_aligned_local (FILE, NAME, SIZE, ALIGN)
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/* The define in pa.h doesn't work with the alias attribute. The
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default is ok with the following define for GLOBAL_ASM_OP. */
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#undef TARGET_ASM_GLOBALIZE_LABEL
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/* This is how we globalize a label. */
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#define GLOBAL_ASM_OP "\t.globl\t"
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/* Hacked version from defaults.h that uses assemble_name_raw
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instead of assemble_name. A symbol in a type directive that
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isn't otherwise referenced doesn't cause the symbol to be
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placed in the symbol table of the assembled object. */
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#undef ASM_OUTPUT_TYPE_DIRECTIVE
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#define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE) \
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do { \
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fputs (TYPE_ASM_OP, STREAM); \
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assemble_name_raw (STREAM, NAME); \
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fputs (", ", STREAM); \
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fprintf (STREAM, TYPE_OPERAND_FMT, TYPE); \
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putc ('\n', STREAM); \
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} while (0)
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/* Hacked version from elfos.h that doesn't output a label. */
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#undef ASM_DECLARE_FUNCTION_NAME
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#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
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do { \
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ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function"); \
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ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
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} while (0)
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/* The type of external references must be set correctly for the
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dynamic loader to work correctly. This is equivalent to the
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HP assembler's .IMPORT directive but relates more directly to
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ELF object file types. */
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#undef ASM_OUTPUT_EXTERNAL
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#define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
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pa_hpux_asm_output_external ((FILE), (DECL), (NAME))
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#define ASM_OUTPUT_EXTERNAL_REAL(FILE, DECL, NAME) \
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do { \
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if (FUNCTION_NAME_P (NAME)) \
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ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function"); \
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else \
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ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \
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default_elf_asm_output_external (FILE, DECL, NAME); \
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} while (0)
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/* We need set the type for external libcalls. Also note that not all
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libcall names are passed to targetm.encode_section_info (e.g., __main).
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Thus, we also have to do the section encoding if it hasn't been done
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already. */
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#undef ASM_OUTPUT_EXTERNAL_LIBCALL
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#define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
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do { \
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if (!FUNCTION_NAME_P (XSTR (FUN, 0))) \
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hppa_encode_label (FUN); \
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ASM_OUTPUT_TYPE_DIRECTIVE (FILE, XSTR (FUN, 0), "function"); \
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} while (0)
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/* We need to use the HP style for internal labels. */
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#undef ASM_GENERATE_INTERNAL_LABEL
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#define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
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sprintf (LABEL, "*%c$%s%04ld", (PREFIX)[0], (PREFIX) + 1, (long)(NUM))
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#else /* USING_ELFOS_H */
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/* We are not using GAS. */
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#define TARGET_GAS 0
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/* HPUX 11 has the "new" HP assembler. It's still lousy, but it's a whole
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lot better than the assembler shipped with older versions of hpux.
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However, it doesn't support weak symbols and is a bad fit with ELF. */
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#undef NEW_HP_ASSEMBLER
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#define NEW_HP_ASSEMBLER 1
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/* It looks like DWARF2 will be the easiest debug format to handle on this
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platform. */
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#define DWARF2_DEBUGGING_INFO 1
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#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
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/* This target uses the ELF object file format. */
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#define OBJECT_FORMAT_ELF
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#undef TARGET_ASM_FILE_START
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#define TARGET_ASM_FILE_START pa_hpux64_hpas_file_start
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#undef TEXT_SECTION_ASM_OP
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#define TEXT_SECTION_ASM_OP "\t.SUBSPA $CODE$\n"
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#undef READONLY_DATA_SECTION_ASM_OP
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#define READONLY_DATA_SECTION_ASM_OP "\t.SUBSPA $LIT$\n"
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#undef DATA_SECTION_ASM_OP
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#define DATA_SECTION_ASM_OP "\t.SUBSPA $DATA$\n"
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#undef BSS_SECTION_ASM_OP
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#define BSS_SECTION_ASM_OP "\t.SUBSPA $BSS$\n"
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/* We provide explicit defines for CTORS_SECTION_ASM_OP and
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DTORS_SECTION_ASM_OP since we don't yet have support for
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named sections with the HP assembler. */
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#undef CTORS_SECTION_ASM_OP
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#define CTORS_SECTION_ASM_OP "\t.SUBSPA \\.ctors,QUAD=1,ALIGN=8,ACCESS=31"
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#undef DTORS_SECTION_ASM_OP
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#define DTORS_SECTION_ASM_OP "\t.SUBSPA \\.dtors,QUAD=1,ALIGN=8,ACCESS=31"
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#define HP_INIT_ARRAY_SECTION_ASM_OP \
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"\t.SUBSPA \\.init,QUAD=1,ALIGN=8,ACCESS=31"
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#define GNU_INIT_ARRAY_SECTION_ASM_OP \
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"\t.SUBSPA \\.init_array,QUAD=1,ALIGN=8,ACCESS=31"
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#define HP_FINI_ARRAY_SECTION_ASM_OP \
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"\t.SUBSPA \\.fini,QUAD=1,ALIGN=8,ACCESS=31"
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#define GNU_FINI_ARRAY_SECTION_ASM_OP \
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"\t.SUBSPA \\.fini_array,QUAD=1,ALIGN=8,ACCESS=31"
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#endif /* USING_ELFOS_H */
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/* The following defines, used to run constructors and destructors with
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the SOM linker under HP-UX 11, are not needed. */
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#undef HAS_INIT_SECTION
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#undef LD_INIT_SWITCH
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#undef LD_FINI_SWITCH
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/* The following STARTFILE_SPEC and ENDFILE_SPEC defines provide the
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magic needed to run initializers and finalizers. */
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#undef STARTFILE_SPEC
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#if TARGET_HPUX_11_11
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#define STARTFILE_SPEC \
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"%{!shared: %{!symbolic: crt0%O%s} %{munix=95:unix95.o%s} \
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%{!munix=93:%{!munix=95:unix98%O%s}}} %{static:crtbeginT%O%s} \
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%{!static:%{!shared:crtbegin%O%s} %{shared:crtbeginS%O%s}}"
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#else
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#define STARTFILE_SPEC \
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"%{!shared: %{!symbolic: crt0%O%s} %{munix=95:unix95%O%s}} \
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%{static:crtbeginT%O%s} %{!static:%{!shared:crtbegin%O%s} \
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%{shared:crtbeginS%O%s}}"
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#endif
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#undef ENDFILE_SPEC
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#define ENDFILE_SPEC "%{!shared:crtend%O%s} %{shared:crtendS%O%s}"
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/* Since HP uses the .init and .fini sections for array initializers
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and finalizers, we need different defines for INIT_SECTION_ASM_OP
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and FINI_SECTION_ASM_OP. With the implementation adopted below,
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the sections are not actually used. However, we still must provide
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defines to select the proper code path. */
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#undef INIT_SECTION_ASM_OP
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#define INIT_SECTION_ASM_OP
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#undef FINI_SECTION_ASM_OP
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#define FINI_SECTION_ASM_OP
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/* We are using array initializers and don't want calls in the INIT
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and FINI sections. */
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#undef CRT_CALL_STATIC_FUNCTION
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#define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC)
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/* The init_priority attribute is not supported with HP ld. This could be
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supported if collect2 was used with LD_INIT_SWITCH. Unfortunately, this
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approach doesn't work with GNU ld since HP-UX doesn't support DT_INIT,
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and therefore the -init and -fini GNU ld switches. */
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#undef SUPPORTS_INIT_PRIORITY
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#define SUPPORTS_INIT_PRIORITY (TARGET_GNU_LD ? 1 : 0)
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/* We use DTOR_LIST_BEGIN to carry a bunch of hacks to allow us to use
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the init and fini array sections with both the HP and GNU linkers.
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The linkers setup the required dynamic entries in the dynamic segment
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and the dynamic linker does the calls. This approach avoids using
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collect2.
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The first hack is to implement __do_global_ctors_aux in crtbegin as
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it needs to be the first entry in the init array so that it is called
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last. HP got the order of the init array backwards. The DT_INIT_ARRAY
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is supposed to be executed in the same order as the addresses appear in
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the array. DT_FINI_ARRAY is supposed to be executed in the opposite
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order.
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The second hack is a set of plabels to implement the effect of
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CRT_CALL_STATIC_FUNCTION. HP-UX 11 only supports DI_INIT_ARRAY and
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DT_FINI_ARRAY and they put the arrays in .init and .fini, rather than
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in .init_array and .fini_array. The standard defines for .init and
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.fini have the execute flag set. So, the assembler has to be hacked
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to munge the standard flags for these sections to make them agree
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with what the HP linker expects. With the GNU linker, we need to
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used the .init_array and .fini_array sections. So, we set up for
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both just in case. Once we have built the table, the linker does
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the rest of the work.
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The order is significant. Placing __do_global_ctors_aux first in
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the list, results in it being called last. User specified initializers,
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either using the linker +init command or a plabel, run before the
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initializers specified here. */
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/* We need to add frame_dummy to the initializer list if EH_FRAME_SECTION_NAME
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or JCR_SECTION_NAME is defined. */
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#if defined(EH_FRAME_SECTION_NAME) || defined(JCR_SECTION_NAME)
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#define PA_INIT_FRAME_DUMMY_ASM_OP ".dword P%frame_dummy"
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#else
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#define PA_INIT_FRAME_DUMMY_ASM_OP ""
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#endif
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/* The following hack sets up the .init, .init_array, .fini and
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.fini_array sections. */
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#define PA_CRTBEGIN_HACK \
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asm (TEXT_SECTION_ASM_OP); \
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static void __attribute__((used)) \
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__do_global_ctors_aux (void) \
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{ \
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func_ptr *p = __CTOR_LIST__; \
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while (*(p + 1)) \
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p++; \
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for (; *p != (func_ptr) -1; p--) \
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(*p) (); \
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} \
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\
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asm (HP_INIT_ARRAY_SECTION_ASM_OP); \
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asm (".align 8"); \
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asm (".dword P%__do_global_ctors_aux"); \
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asm (PA_INIT_FRAME_DUMMY_ASM_OP); \
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asm (GNU_INIT_ARRAY_SECTION_ASM_OP); \
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asm (".align 8"); \
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asm (".dword P%__do_global_ctors_aux"); \
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asm (PA_INIT_FRAME_DUMMY_ASM_OP); \
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asm (HP_FINI_ARRAY_SECTION_ASM_OP); \
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asm (".align 8"); \
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asm (".dword P%__do_global_dtors_aux"); \
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asm (GNU_FINI_ARRAY_SECTION_ASM_OP); \
|
|
asm (".align 8"); \
|
|
asm (".dword P%__do_global_dtors_aux")
|
|
|
|
/* The following two variants of DTOR_LIST_BEGIN are identical to those
|
|
in crtstuff.c except for the addition of the above crtbegin hack. */
|
|
#ifdef DTORS_SECTION_ASM_OP
|
|
#define DTOR_LIST_BEGIN \
|
|
asm (DTORS_SECTION_ASM_OP); \
|
|
STATIC func_ptr __DTOR_LIST__[1] \
|
|
__attribute__ ((aligned(sizeof(func_ptr)))) \
|
|
= { (func_ptr) (-1) }; \
|
|
PA_CRTBEGIN_HACK
|
|
#else
|
|
#define DTOR_LIST_BEGIN \
|
|
STATIC func_ptr __DTOR_LIST__[1] \
|
|
__attribute__ ((section(".dtors"), aligned(sizeof(func_ptr)))) \
|
|
= { (func_ptr) (-1) }; \
|
|
PA_CRTBEGIN_HACK
|
|
#endif
|
|
|
|
/* If using HP ld do not call pxdb. Use size as a program that does nothing
|
|
and returns 0. /bin/true cannot be used because it is a script without
|
|
an interpreter. */
|
|
#define INIT_ENVIRONMENT "LD_PXDB=/usr/ccs/bin/size"
|
|
|
|
/* The HPUX dynamic linker objects to undefined weak symbols, so do
|
|
not use them in gthr-posix.h. */
|
|
#define GTHREAD_USE_WEAK 0
|
|
|
|
/* We don't want undefined weak references to __register_frame_info,
|
|
__deregister_frame_info, _Jv_RegisterClasses and __cxa_finalize
|
|
introduced by crtbegin.o. The GNU linker only resolves weak
|
|
references if they appear in a shared library. Thus, it would be
|
|
impossible to create a static executable if the symbols were weak.
|
|
So, the best solution seems to be to make the symbols strong and
|
|
provide an archive library of empty stub functions. */
|
|
#define TARGET_ATTRIBUTE_WEAK
|