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7dba9362c1
This arranges for __start and __stop symbols to be defined before garbage collection, for all target formats. That should allow the COFF and PE --gc-sections to keep a singleton orphan input section, a feature lost by 2017-06-13 commitcbd0eecf26. The fancier ELF treatment of keeping all input sections associated with a __start or __stop symbol, from 2015-10-23 commit1cce69b9dc, is retained. .startof. and .sizeof. symbols are deliberately not defined before garbage collection, so these won't affect garbage collection of sections. The patch also ensures __start, __stop, .startof. and .sizeof. symbols are defined before target size_dynamic_sections is called, albeit with a preliminary value, so that target code doesn't need to cope with a symbol changing from undefined at size_dynamic_sections to defined at relocate_section. Also, a number of problems with the testcases have been fixed. PR ld/20022 PR ld/21557 PR ld/21562 PR ld/21571 include/ * bfdlink.h (struct bfd_link_hash_entry): Delete undef.section. bfd/ * targets.c (struct bfd_target): Add _bfd_define_start_stop. (BFD_JUMP_TABLE_LINK): Likewise. * elf-bfd.h (bfd_elf_define_start_stop): Declare. * elflink.c (_bfd_elf_gc_mark_rsec): Update comment. (bfd_elf_define_start_stop): New function. * linker.c (bfd_generic_define_start_stop): New function. * coff64-rs6000.c (rs6000_xcoff64_vec, rs6000_xcoff64_aix_vec): Init new field. * aout-adobe.c (aout_32_bfd_define_start_stop): Define. * aout-target.h (MY_bfd_define_start_stop): Define. * aout-tic30.c (MY_bfd_define_start_stop): Define. * binary.c (binary_bfd_define_start_stop): Define. * bout.c (b_out_bfd_define_start_stop): Define. * coff-alpha.c (_bfd_ecoff_bfd_define_start_stop): Define. * coff-mips.c (_bfd_ecoff_bfd_define_start_stop): Define. * coff-rs6000.c (_bfd_xcoff_bfd_define_start_stop): Define. * coffcode.h (coff_bfd_define_start_stop): Define. * elfxx-target.h (bfd_elfNN_bfd_define_start_stop): Define. * i386msdos.c (msdos_bfd_define_start_stop): Define. * i386os9k.c (os9k_bfd_define_start_stop): Define. * ieee.c (ieee_bfd_define_start_stop): Define. * ihex.c (ihex_bfd_define_start_stop): Define. * libbfd-in.h (_bfd_nolink_bfd_define_start_stop): Define. * mach-o-target.c (bfd_mach_o_bfd_define_start_stop): Define. * mmo.c (mmo_bfd_define_start_stop): Define. * nlm-target.h (nlm_bfd_define_start_stop): Define. * oasys.c (oasys_bfd_define_start_stop): Define. * pef.c (bfd_pef_bfd_define_start_stop): Define. * plugin.c (bfd_plugin_bfd_define_start_stop): Define. * ppcboot.c (ppcboot_bfd_define_start_stop): Define. * som.c (som_bfd_define_start_stop): Define. * srec.c (srec_bfd_define_start_stop): Define. * tekhex.c (tekhex_bfd_define_start_stop): Define. * versados.c (versados_bfd_define_start_stop): Define. * vms-alpha.c (vms_bfd_define_start_stop): Define. (alpha_vms_bfd_define_start_stop): Define. * xsym.c (bfd_sym_bfd_define_start_stop): Define. * bfd-in2.h: Regenerate. * libbfd.h: Regenerate. ld/ * emultempl/elf32.em (gld${EMULATION_NAME}_after_open): Don't set __start/__stop syms here. * ldlang.c (lang_set_startof): Delete. (start_stop_syms, start_stop_count, start_stop_alloc): New vars. (lang_define_start_stop, lang_init_start_stop, foreach_start_stop, undef_start_stop, lang_undef_start_stop, lang_init_startof_sizeof, set_start_stop, lang_finalize_start_stop): New functions. (lang_process): Call _start_stop functions. * testsuite/ld-elf/pr21562a.d: Use xfail rather than notarget. Correct typos and list of xfail targets. * testsuite/ld-elf/pr21562b.d: Likewise. * testsuite/ld-elf/pr21562c.d: Likewise. * testsuite/ld-elf/pr21562d.d: Likewise. * testsuite/ld-elf/pr21562e.d: Likewise. * testsuite/ld-elf/pr21562f.d: Likewise. * testsuite/ld-elf/pr21562g.d: Likewise. * testsuite/ld-elf/pr21562h.d: Likewise. * testsuite/ld-elf/pr21562i.d: Likewise. * testsuite/ld-elf/pr21562j.d: Likewise. * testsuite/ld-elf/pr21562k.d: Likewise. * testsuite/ld-elf/pr21562l.d: Likewise. * testsuite/ld-elf/pr21562m.d: Likewise. * testsuite/ld-elf/pr21562n.d: Likewise. * testsuite/ld-elf/sizeofa.d: Likewise. Adjust to pass for generic ELF. * testsuite/ld-elf/sizeofb.d: Likewise. * testsuite/ld-elf/startofa.d: Likewise. * testsuite/ld-elf/startofb.d: Likewise.
266 lines
10 KiB
C
266 lines
10 KiB
C
/* Target definitions for 32/64-bit NLM (NetWare Loadable Module)
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Copyright (C) 1993-2017 Free Software Foundation, Inc.
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This file is part of BFD, the Binary File Descriptor library.
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This program 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 of the License, or
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(at your option) any later version.
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This program 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 this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#define nlm_core_file_p _bfd_dummy_target
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#define nlm_get_symtab_upper_bound nlmNAME (get_symtab_upper_bound)
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#define nlm_canonicalize_symtab nlmNAME (canonicalize_symtab)
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#define nlm_make_empty_symbol nlmNAME (make_empty_symbol)
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#define nlm_print_symbol nlmNAME (print_symbol)
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#define nlm_get_symbol_info nlmNAME (get_symbol_info)
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#define nlm_get_symbol_version_string _bfd_nosymbols_get_symbol_version_string
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#define nlm_bfd_is_local_label_name bfd_generic_is_local_label_name
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#define nlm_bfd_is_target_special_symbol ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)
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#define nlm_get_lineno _bfd_nosymbols_get_lineno
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#define nlm_find_nearest_line _bfd_nosymbols_find_nearest_line
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#define nlm_find_line _bfd_nosymbols_find_line
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#define nlm_find_inliner_info _bfd_nosymbols_find_inliner_info
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#define nlm_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
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#define nlm_read_minisymbols _bfd_generic_read_minisymbols
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#define nlm_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
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#define nlm_get_reloc_upper_bound nlmNAME (get_reloc_upper_bound)
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#define nlm_canonicalize_reloc nlmNAME (canonicalize_reloc)
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#define nlm_set_reloc _bfd_generic_set_reloc
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#define nlm_bfd_reloc_type_lookup bfd_default_reloc_type_lookup
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#define nlm_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
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#define nlm_set_section_contents nlmNAME (set_section_contents)
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#define nlm_sizeof_headers _bfd_nolink_sizeof_headers
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#define nlm_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
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#define nlm_bfd_relax_section bfd_generic_relax_section
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#define nlm_bfd_gc_sections bfd_generic_gc_sections
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#define nlm_bfd_lookup_section_flags bfd_generic_lookup_section_flags
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#define nlm_bfd_merge_sections bfd_generic_merge_sections
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#define nlm_bfd_is_group_section bfd_generic_is_group_section
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#define nlm_bfd_discard_group bfd_generic_discard_group
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#define nlm_section_already_linked _bfd_generic_section_already_linked
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#define nlm_bfd_define_common_symbol bfd_generic_define_common_symbol
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#define nlm_bfd_define_start_stop bfd_generic_define_start_stop
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#define nlm_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
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#define nlm_bfd_link_add_symbols _bfd_generic_link_add_symbols
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#define nlm_bfd_link_just_syms _bfd_generic_link_just_syms
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#define nlm_bfd_copy_link_hash_symbol_type \
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_bfd_generic_copy_link_hash_symbol_type
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#define nlm_bfd_final_link _bfd_generic_final_link
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#define nlm_bfd_link_split_section _bfd_generic_link_split_section
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#define nlm_bfd_link_check_relocs _bfd_generic_link_check_relocs
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/* This structure contains everything that BFD knows about a target.
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It includes things like its byte order, name, what routines to call
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to do various operations, etc. Every BFD points to a target structure
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with its "xvec" member.
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There are two such structures here: one for big-endian machines and
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one for little-endian machines. */
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/* Forward declaration for use when initialising alternative_target field. */
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#ifdef TARGET_LITTLE_SYM
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extern const bfd_target TARGET_LITTLE_SYM;
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#endif
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#ifdef TARGET_BIG_SYM
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const bfd_target TARGET_BIG_SYM =
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{
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/* Name: identify kind of target. */
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TARGET_BIG_NAME,
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/* Flavour: general indication about file. */
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bfd_target_nlm_flavour,
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/* Byteorder: data is big endian. */
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BFD_ENDIAN_BIG,
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/* Header_byteorder: header is also big endian. */
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BFD_ENDIAN_BIG,
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/* Object_flags: mask of all file flags. */
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(HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS
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| WP_TEXT),
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/* Section_flags: mask of all section flags. */
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(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY
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| SEC_CODE | SEC_DATA),
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/* Leading_symbol_char: is the first char of a user symbol
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predictable, and if so what is it. */
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0,
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/* AR_pad_char: pad character for filenames within an archive header
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FIXME: this really has nothing to do with NLM, this is a characteristic
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of the archiver and/or os and should be independently tunable. */
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'/',
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/* AR_max_namelen: maximum number of characters in an archive header
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FIXME: this really has nothing to do with NLM, this is a characteristic
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of the archiver and should be independently tunable. This value is
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a WAG (wild a** guess). */
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15,
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0, /* match priority. */
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/* Routines to byte-swap various sized integers from the data sections. */
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bfd_getb64, bfd_getb_signed_64, bfd_putb64,
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bfd_getb32, bfd_getb_signed_32, bfd_putb32,
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bfd_getb16, bfd_getb_signed_16, bfd_putb16,
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/* Routines to byte-swap various sized integers from the file headers. */
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bfd_getb64, bfd_getb_signed_64, bfd_putb64,
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bfd_getb32, bfd_getb_signed_32, bfd_putb32,
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bfd_getb16, bfd_getb_signed_16, bfd_putb16,
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/* bfd_check_format: check the format of a file being read. */
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{ _bfd_dummy_target, /* Unknown format. */
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nlmNAME (object_p), /* Assembler/linker output (object file). */
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bfd_generic_archive_p, /* An archive. */
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nlm_core_file_p /* A core file. */
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},
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/* bfd_set_format: set the format of a file being written. */
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{ bfd_false,
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nlm_mkobject,
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_bfd_generic_mkarchive,
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bfd_false
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},
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/* bfd_write_contents: write cached information into a file being written. */
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{ bfd_false,
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nlmNAME (write_object_contents),
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_bfd_write_archive_contents,
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bfd_false
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},
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/* Initialize a jump table with the standard macro.
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All names start with "nlm". */
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BFD_JUMP_TABLE_GENERIC (_bfd_generic),
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BFD_JUMP_TABLE_COPY (_bfd_generic),
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BFD_JUMP_TABLE_CORE (_bfd_nocore),
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BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
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BFD_JUMP_TABLE_SYMBOLS (nlm),
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BFD_JUMP_TABLE_RELOCS (nlm),
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BFD_JUMP_TABLE_WRITE (nlm),
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BFD_JUMP_TABLE_LINK (nlm),
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BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
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/* Alternative endian target. */
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#ifdef TARGET_LITTLE_SYM
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& TARGET_LITTLE_SYM,
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#else
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NULL,
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#endif
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/* Backend_data. */
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(void *) TARGET_BACKEND_DATA
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};
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#endif
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#ifdef TARGET_LITTLE_SYM
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const bfd_target TARGET_LITTLE_SYM =
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{
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/* Name: identify kind of target. */
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TARGET_LITTLE_NAME,
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/* Flavour: general indication about file. */
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bfd_target_nlm_flavour,
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/* Byteorder: data is little endian. */
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BFD_ENDIAN_LITTLE,
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/* Header_byteorder: header is also little endian. */
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BFD_ENDIAN_LITTLE,
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/* Object_flags: mask of all file flags. */
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(HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS
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| WP_TEXT),
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/* Section_flags: mask of all section flags. */
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(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY
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| SEC_DATA),
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/* Leading_symbol_char: is the first char of a user symbol
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predictable, and if so what is it. */
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0,
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/* AR_pad_char: pad character for filenames within an archive header
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FIXME: this really has nothing to do with NLM, this is a characteristic
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of the archiver and/or os and should be independently tunable. */
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'/',
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/* AR_max_namelen: maximum number of characters in an archive header
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FIXME: this really has nothing to do with NLM, this is a characteristic
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of the archiver and should be independently tunable. This value is
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a WAG (wild a** guess). */
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15,
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0, /* match priority. */
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/* Routines to byte-swap various sized integers from the data sections. */
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bfd_getl64, bfd_getl_signed_64, bfd_putl64,
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bfd_getl32, bfd_getl_signed_32, bfd_putl32,
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bfd_getl16, bfd_getl_signed_16, bfd_putl16,
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/* Routines to byte-swap various sized integers from the file headers. */
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bfd_getl64, bfd_getl_signed_64, bfd_putl64,
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bfd_getl32, bfd_getl_signed_32, bfd_putl32,
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bfd_getl16, bfd_getl_signed_16, bfd_putl16,
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/* bfd_check_format: check the format of a file being read. */
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{ _bfd_dummy_target, /* Unknown format. */
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nlmNAME(object_p), /* Assembler/linker output (object file). */
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bfd_generic_archive_p, /* An archive. */
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nlm_core_file_p /* A core file. */
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},
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/* bfd_set_format: set the format of a file being written. */
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{ bfd_false,
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nlm_mkobject,
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_bfd_generic_mkarchive,
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bfd_false
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},
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/* bfd_write_contents: write cached information into a file being written. */
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{ bfd_false,
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nlmNAME(write_object_contents),
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_bfd_write_archive_contents,
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bfd_false
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},
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/* Initialize a jump table with the standard macro.
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All names start with "nlm". */
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BFD_JUMP_TABLE_GENERIC (_bfd_generic),
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BFD_JUMP_TABLE_COPY (_bfd_generic),
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BFD_JUMP_TABLE_CORE (_bfd_nocore),
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BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
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BFD_JUMP_TABLE_SYMBOLS (nlm),
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BFD_JUMP_TABLE_RELOCS (nlm),
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BFD_JUMP_TABLE_WRITE (nlm),
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BFD_JUMP_TABLE_LINK (nlm),
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BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
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/* Alternative endian target. */
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#ifdef TARGET_BIG_SYM
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& TARGET_BIG_SYM,
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#else
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NULL,
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#endif
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/* Backend_data. */
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(void *) TARGET_BACKEND_DATA
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};
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#endif
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