This patch adds --compress-debug-sections={none|zlib|zlib-gnu|zlib-gabi}
options to gas and objcopy for ELF files. They control how DWARF debug
sections are compressed. --compress-debug-sections=none is equivalent to
--nocompress-debug-sections. --compress-debug-sections=zlib and
--compress-debug-sections=zlib-gnu are equivalent to
--compress-debug-sections. --compress-debug-sections=zlib-gabi compresses
DWARF debug sections with SHF_COMPRESSED from the ELF ABI. No linker
changes are required to support SHF_COMPRESSED.
bfd/
* archive.c (_bfd_get_elt_at_filepos): Also copy BFD_COMPRESS_GABI
bit.
* bfd.c (bfd::flags): Increase size to 18 bits.
(BFD_COMPRESS_GABI): New.
(BFD_FLAGS_SAVED): Add BFD_COMPRESS_GABI.
(BFD_FLAGS_FOR_BFD_USE_MASK): Likewise.
(bfd_update_compression_header): New fuction.
(bfd_check_compression_header): Likewise.
(bfd_get_compression_header_size): Likewise.
(bfd_is_section_compressed_with_header): Likewise.
* compress.c (MAX_COMPRESSION_HEADER_SIZE): New.
(bfd_compress_section_contents): Return the uncompressed size if
the full section contents is compressed successfully. Support
converting from/to .zdebug* sections.
(bfd_get_full_section_contents): Call
bfd_get_compression_header_size to get compression header size.
(bfd_is_section_compressed): Renamed to ...
(bfd_is_section_compressed_with_header): This. Add a pointer
argument to return compression header size.
(bfd_is_section_compressed): Use it.
(bfd_init_section_decompress_status): Call
bfd_get_compression_header_size to get compression header size.
Return FALSE if uncompressed section size is 0.
* elf.c (_bfd_elf_make_section_from_shdr): Support converting
from/to .zdebug* sections.
* bfd-in2.h: Regenerated.
binutils/
* objcopy.c (do_debug_sections): Add compress_zlib,
compress_gnu_zlib and compress_gabi_zlib.
(copy_options): Use optional_argument on compress-debug-sections.
(copy_usage): Update --compress-debug-sections.
(copy_file): Handle compress_zlib, compress_gnu_zlib and
compress_gabi_zlib.
(copy_main): Handle
--compress-debug-sections={none|zlib|zlib-gnu|zlib-gabi}.
* doc/binutils.texi: Document
--compress-debug-sections={none|zlib|zlib-gnu|zlib-gabi}.
binutils/testsuite/
* compress.exp: Add tests for
--compress-debug-sections={none|zlib|zlib-gnu|zlib-gabi}.
* binutils-all/dw2-3.rS: New file.
* binutils-all/dw2-3.rt: Likewise.
* binutils-all/libdw2-compressedgabi.out: Likewise.
gas/
* as.c (show_usage): Update --compress-debug-sections.
(std_longopts): Use optional_argument on compress-debug-sections.
(parse_args): Handle
--compress-debug-sections={none|zlib|zlib-gnu|zlib-gabi}.
* as.h (compressed_debug_section_type): New.
(flag_compress_debug): Change type to compressed_debug_section_type.
--compress-debug-sections={none|zlib|zlib-gnu|zlib-gabi}.
* write.c (compress_debug): Set BFD_COMPRESS_GABI for
--compress-debug-sections=zlib-gabi. Call
bfd_get_compression_header_size to get compression header size.
Don't rename section name for --compress-debug-sections=zlib-gabi.
* config/tc-i386.c (compressed_debug_section_type): Set to
COMPRESS_DEBUG_ZLIB.
* doc/as.texinfo: Document
--compress-debug-sections={none|zlib|zlib-gnu|zlib-gabi}.
gas/testsuite/
* gas/i386/dw2-compressed-1.d: New file.
* gas/i386/dw2-compressed-2.d: Likewise.
* gas/i386/dw2-compressed-3.d: Likewise.
* gas/i386/x86-64-dw2-compressed-2.d: Likewise.
* gas/i386/i386.exp: Run dw2-compressed-2, dw2-compressed-1,
dw2-compressed-3 and x86-64-dw2-compressed-2.
ld/testsuite/
* ld-elf/compress.exp: Add a test for
--compress-debug-sections=zlib-gabi.
(build_tests): Add 2 tests for --compress-debug-sections=zlib-gabi.
(run_tests): Likewise.
Verify linker output with zlib-gabi compressed debug input.
* ld-elf/compressed1a.d: New file.
* ld-elf/compressed1b.d: Likewise.
* ld-elf/compressed1c.d: Likewise.
LTO output objects have an STT_FILE symbol using the name of the file,
a temporary file. This results in executables that can't be exactly
reproduced, so the file name needs to be dropped. We don't want to
lose all file symbols when linking a mix of lto and non-lto objects as
a file symbol can be used to figure which source file generated a
given local symbol. So lto output objects need to be marked.
I chose to mark lto output objects with a new bfd flag. This flag is
also used to fix a bug in the link-once handling; An object being
loaded after "loading_lto_outputs" is set might be one extracted from
an archive to satisfy new references from lto objects, not an lto
object itself.
The new flag is copied from archive to elements, and the same done
for no_export. This fixes a bug in that --exclude-libs doesn't work
with thin archives. I'm not completely happy with this part of the
patch and may revist this to avoid the hack in
_bfd_look_for_bfd_in_cache.
PR ld/17973
include/
* bfdlink.h (struct bfd_link_info): Delete loading_lto_outputs.
bfd/
* bfd.c (struct bfd): Add lto_output.
* linker.c (_bfd_handle_already_linked): Explicitly test for
objects added by the lto plugin.
* opncls.c (_bfd_new_bfd_contained_in): Copy lto_output and
no_export flags from archive.
* archive.c (open_nested_file): New function, setting lto_output
and no_export, extracted from..
(find_nested_archive): ..here. Flip params. Rename from
_bfd_find_nested_archive.
(_bfd_get_elt_at_filepos): Correct var typo. Use open_nested_file.
(_bfd_look_for_bfd_in_cache): Copy no_export.
* elflink.c (elf_link_add_object_symbols): Remove now unnecessary
my_archive->no_export test.
(elf_link_input_bfd): Drop existing lto_output STT_FILE syms.
Don't use the file name when adding lto_output STT_FILE sym.
* bfd-in2.h: Regenerate.
ld/
* ldlang.h (struct lang_input_statement_flags): Add lto_output.
* ldlang.c (lang_process): Don't set loading_lto_outputs.
* ldfile.c (ldfile_try_open_bfd): Transfer entry flags.lto_output
to bfd.
* plugin.c (add_input_file, add_input_library): Set flags.lto_output.
PR binutils/17512
* nm.c (print_symbol): Add 'is_synthetic' parameter. Use it to
help initialize the info.elfinfo field.
(print_size_symbols): Add 'synth_count' parameter. Use it to set
the is_synthetic parameter when calling print_symbol.
(print_symbols): Likewise.
(display_rel_file): Pass synth_count to printing function.
(display_archive): Break loop if the last archive displayed
matches the current archive.
* size.c (display_archive): Likewise.
* archive.c (do_slurp_bsd_armap): Make sure that the parsed sized
is at least big enough for the header to be read.
* elf32-i386.c (elf_i386_get_plt_sym_val): Skip unknown relocs.
* mach-o.c (bfd_mach_o_get_synthetic_symtab): Add range checks.
(bfd_mach_o_read_command): Prevetn duplicate error messages about
unrecognized commands.
* syms.c (_bfd_stab_section_find_nearest_line): Add range checks
when indexing into the string table.
PR binutils/17512
* dwarf.h (struct dwarf_section): Add user_data field.
* dwarf.c (frame_need_space): Check for an over large register
number.
(display_debug_frames): Check the return value from
frame_need_space. Check for a CFA expression that is so long the
start address wraps around.
(debug_displays): Initialise the user_data field.
* objdump.c (load_specific_debug_section): Save the BFD section
pointer in the user_data field of the dwarf_section structure.
(free_debug_section): Update BFD section data when freeing section
contents.
* readelf.c (load_specific_debug_section): Initialise the
user_data field.
* archive.c (do_slurp_coff_armap): Add range checks to prevent
running off the end of the string table.
* compress.c (bfd_get_full_section_contents): Return a NULL
pointer for zero sized sections. Do not attempt to copy a buffer
onto itself.
* elf-attrs.c (_bfd_elf_parse_attributes): Check for an empty
header. Add range checks to avoid running off the end of the
section.
* elf.c (bfd_elf_get_str_section): Seek before allocating so that
if the seek fails, no memory is allocated.
(bfd_elf_string_from_elf_section): Do not allocate a string from a
non string section. It only leads to trouble later on.
(_bfd_elf_print_private_bfd_data): Check for there being too
little external dynamic data.
(bfd_section_from_shdr): Replace assertion with a failure mode.
(bfd_section_from_shdr): When walking a loaded group section use
the internal structure size, not the external size. Check for the
group section being empty.
* elf32-i386.c (elf_i386_rtype_to_howto): Replace assertion with a
failure mode.
* elfcode.h (elf_slurp_reloc_table): Likewise.
* reloc.c (bfd_perform_relocation): Avoid seg-fault if the howto
parameter is NULL.
PR binutils/15151
* archive.c (_bfd_find_nested_archive): Don't allow a nested
archive pointing to itself.
(_bfd_get_elt_at_filepos): Revert the last 2 changes.
areltdata.
* opncls.c (_bfd_delete_bfd): Free arelt_data.
* mach-o.c (bfd_mach_o_fat_member_init): Use bfd_zmalloc for
areltdata.
* ecoff.c (_bfd_ecoff_slurp_armap): Use free for mapdata.
* coff-rs6000.c (_bfd_xcoff_read_ar_hdr): Use bfd_zmalloc for
areltdata.
(xcoff_write_archive_contents_old): Likewise.
(xcoff_write_archive_contents_big): Likewise.
* archive64.c (bfd_elf64_archive_slurp_armap): Use free for
areltdata.
* archive.c (_bfd_generic_read_ar_hdr_mag): Use bfd_zmalloc and
free for areltdata.
(_bfd_get_elt_at_filepos): Likewise. Clear n_nfd->arelt_data on
failure.
(do_slurp_bsd_armap): Use bfd_zmalloc and free for areltdata.
(do_slurp_coff_armap): Likewise.
(_bfd_slurp_extended_name_table): Likewise.
(bfd_slurp_bsd_armap_f2): Likewise. Don't leak 'mapdata'.
* archive.c (_bfd_ar_sizepad): New function. Correctly install and
pad the size field in an archive header.
(_bfd_generic_read_ar_hdr_mag): Use the correct type and scan
function for the archive size field.
(bfd_generic_openr_next_archived_file): Likewise.
(do_slurp_coff_armap): Likewise.
(_bfd_write_archive_contents): Likewise.
(_bfd_bsd44_write_ar_hdr): Use the new function.
(bfd_ar_hdr_from_filesystem): Likewise.
(_bfd_write_archive_contents): Likewise.
(bsd_write_armap): Likewise.
(coff_write_armap): Likewise.
* archive64.c (bfd_elf64_archive_write_armap): Likewise.
* bfdio.c (bfd_bread): Use correct type for archive element
sizes.
* ar.c (open_inarch): Likewise.
(extract_file): Likewise.
* libbfd-in.h (struct areltdata): Use correct types for
parsed_size and extra_size fields.
Prototype _bfd_ar_sizepad function.
* libbfd.h: Regenerate.
* archive.c (bfd_generic_archive_p): Only check first element
when target_defaulted.
(_bfd_construct_extended_name_table): Use ar_maxnamelen.
(_bfd_archive_bsd44_construct_extended_name_table): Likewise.
* archive.c (_bfd_get_elt_at_filepos): Set correct error value if
unable to read a file pointed to by an entry in a thin archive.
(adjust_relative_path): Use lrealpath to canonicalize paths.
Handle the case where the reference path is above the current
path in the directory tree.
2010-11-12 H.J. Lu <hongjiu.lu@intel.com>
* archive.c (_bfd_get_elt_at_filepos): Copy BFD_COMPRESS and
BFD_DECOMPRESS.
(bfd_openr_next_archived_file): Revert the last change.
* archive.c (_bfd_calloc_wrapper): New function.
(_bfd_add_bfd_to_archive_cache): Use it.
* configure.in: Add alpha*-*-*vms* to list of natives.
* configure: Regenerate.
* vms-misc.c: Define globalref if necessary.
(vms_convert_to_var_unix_filename): Rename to
_bfd_vms_convert_to_var_unix_filename and export.
* vms.h: Add prototype for _bfd_vms_convert_to_var_unix_filename.
* vms-alpha.c (vms_close_and_cleanup): Update invocation of
vms_convert_to_var_unix_filename.
* vms.h: Include time.h. Add prototypes for vms_get_module_name,
vms_time_to_time_t and vms_rawtime_to_time_t.
* vms.c (vms_alpha_vec): Add archives support.
* vms-misc.c: Include safe-ctype.h
(vms_get_module_name): New function.
(vms_time_to_time_t, vms_rawtime_to_time_t): Ditto.
* vms-hdr.c (_bfd_vms_write_hdr): Put module name creation to the
vms_get_module_name function. Use this function.
* targets.c: Declare vms_lib_txt_vec. Add it to _bfd_target_vector.
* libbfd-in.h: Add prototype for _bfd_append_relative_path.
Add prototypes for vms-lib.c
* libbfd.h: Regenerate.
* configure.in (TDEFINES): Add an entry for vms_lib_txt_vec. Add
vms-lib.lo to vms_alpha_vec.
* config.bfd (targ_cpu): Add targ_selvecs for alpha*-*-*vms*.
* configure: Regenerate.
* bfd.c: Add selective_search field.
* bfd-in2.h: Regenerate.
* archive.c (append_relative_path): Rename to
_bfd_append_relative_path and make it public.
(_bfd_get_elt_at_filepos): Adjust for above renaming.
* Makefile.am (BFD32_BACKENDS): Add vms-lib.lo
(BFD32_BACKENDS_CFILES): Add vms-lib.c
* Makefile.in: Regenerate.
Alan Modra