From 4a114e3e0c1c3337981179b774f1d6d1b06d201f Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Fri, 29 Oct 2010 12:10:39 +0000 Subject: Add compressed debug section support to binutils and ld. bfd/ 2010-10-29 H.J. Lu Cary Coutant * archive.c (bfd_openr_next_archived_file): Copy BFD_COMPRESS and BFD_DECOMPRESS. * bfd.c (BFD_COMPRESS): New. (BFD_DECOMPRESS): Likewise. (BFD_FLAGS_SAVED): Likewise. (bfd_preserve_save): Replace BFD_IN_MEMORY with BFD_FLAGS_SAVED. * compress.c (bfd_uncompress_section_contents): Removed. (get_uncompressed_size): New. (decompress_contents): Likewise. (bfd_compress_section_contents): Likewise. (bfd_get_full_section_contents): Likewise. (bfd_is_section_compressed): Likewise. (bfd_init_section_decompress_status): Likewise. (bfd_init_section_compress_status): Likewise. * dwarf2.c (dwarf_debug_sections): New. (dwarf_debug_section_enum): Likewise. (read_section): Remove section_name and compressed_section_name. Add dwarf_debug_section_enum. Try compressed debug section. (read_indirect_string): Updated. (read_abbrevs): Likewise. (decode_line_info): Likewise. (read_debug_ranges): Likewise. (find_line): Updated. * ecoff.c (bfd_debug_section): Add compress_status and compressed_size. * elf.c (_bfd_elf_make_section_from_shdr): Call bfd_is_section_compressed to check if a DWARF debug section is compressed. Call bfd_init_section_compress_status or bfd_init_section_decompress_status if needed. * elflink.c (elf_link_input_bfd): Replace bfd_get_section_contents with bfd_get_full_section_contents. * merge.c (_bfd_add_merge_section): Likewise. * reloc.c (bfd_generic_get_relocated_section_contents): Likewise. * simple.c (bfd_simple_get_relocated_section_contents): Likewise. * elfxx-target.h (TARGET_BIG_SYM): Allow BFD_COMPRESS and BFD_DECOMPRESS. (TARGET_LITTLE_SYM): Likewise. * libbfd-in.h (dwarf_debug_section): New. (dwarf_debug_sections): Likewise. * libbfd.c (_bfd_generic_get_section_contents): Issue an error when getting contents on compressed/decompressed section. * section.c (COMPRESS_SECTION_NONE): New. (COMPRESS_SECTION_DONE): Likewise. (DECOMPRESS_SECTION_SIZED): Likewise. (BFD_FAKE_SECTION): Add compress_status and compressed_size. (bfd_malloc_and_get_section): Replace bfd_get_section_contents with bfd_get_full_section_contents. * bfd-in2.h: Regenerated. * libbfd.h: Likewise. binutils/ 2010-10-29 H.J. Lu * addr2line.c (process_file): Set BFD_DECOMPRESS. * objcopy.c (do_debug_sections): New. (OPTION_COMPRESS_DEBUG_SECTIONS): New. (OPTION_DECOMPRESS_DEBUG_SECTIONS): Likewise. (copy_options): Add OPTION_COMPRESS_DEBUG_SECTIONS and OPTION_DECOMPRESS_DEBUG_SECTIONS. (copy_usage): Add --compress-debug-sections and --decompress-debug-sections. (copy_file): Set BFD_COMPRESS or BFD_DECOMPRESS. (copy_section): Replace bfd_get_section_contents with bfd_get_full_section_contents. (copy_main): Handle OPTION_COMPRESS_DEBUG_SECTIONS and OPTION_DECOMPRESS_DEBUG_SECTIONS. Check do_debug_sections to rename DWARF debug sections. * objdump.c (load_specific_debug_section): Replace bfd_get_section_contents with bfd_get_full_section_contents. Remove bfd_uncompress_section_contents. (dump_section): Replace bfd_get_section_contents with bfd_get_full_section_contents. (display_file): Set BFD_DECOMPRESS if needed. * readelf.c (uncompress_section_contents): Set buffer to NULL to indiate decompression failure. (load_specific_debug_section): Always call uncompress_section_contents. * doc/binutils.texi: Document --compress-debug-sections and --decompress-debug-sections. binutils/testsuite/ 2010-10-29 H.J. Lu * binutils-all/compress.exp: New. * binutils-all/dw2-1.S: Likewise. * binutils-all/dw2-2.S: Likewise. * binutils-all/libdw2-compressed.out: Likewise. * binutils-all/libdw2.out: Likewise. gas/ 2010-10-29 H.J. Lu * write.c (compress_debug): Optimize section flags check. gas/testsuite/ 2010-10-29 H.J. Lu * elf/dwarf2-1.s: Replace .zdebug_abbrev section with .debug_abbrev section. * elf/dwarf2-2.3: Likewise. * elf/dwarf2-1.d: Pass --compress-debug-sections to assembler. Updated. * elf/dwarf2-2.d: Likewise. * gas/i386/i386.exp: Remove xfail on dw2-compress-2 and x86-64-dw2-compress-2. ld/ 2010-10-29 H.J. Lu * ldfile.c (ldfile_try_open_bfd): Set BFD_DECOMPRESS after bfd_openr returns. * emultempl/elf32.em (gld${EMULATION_NAME}_try_needed): Likewise. * scripttempl/elf.sc: Include compressed DWARF debug sections. ld/testsuite/ 2010-10-29 H.J. Lu * ld-elf/compress.exp: New. * ld-elf/compress1.s: Likewise. * ld-elf/compress1a.d: Likewise. * ld-elf/compress1b.d: Likewise. * ld-elf/compress1c.d: Likewise. --- bfd/dwarf2.c | 174 ++++++++++++++++++++++++++++------------------------------- 1 file changed, 82 insertions(+), 92 deletions(-) (limited to 'bfd/dwarf2.c') diff --git a/bfd/dwarf2.c b/bfd/dwarf2.c index 1285833..e5d0103 100644 --- a/bfd/dwarf2.c +++ b/bfd/dwarf2.c @@ -275,6 +275,60 @@ struct attr_abbrev enum dwarf_form form; }; +/* Map of uncompressed DWARF debug section name to compressed one. It + is terminated by NULL uncompressed_name. */ + +struct dwarf_debug_section dwarf_debug_sections[] = +{ + { ".debug_abbrev", ".zdebug_abbrev" }, + { ".debug_aranges", ".zdebug_aranges" }, + { ".debug_frame", ".zdebug_frame" }, + { ".debug_info", ".zdebug_info" }, + { ".debug_line", ".zdebug_line" }, + { ".debug_loc", ".zdebug_loc" }, + { ".debug_macinfo", ".zdebug_macinfo" }, + { ".debug_pubnames", ".zdebug_pubnames" }, + { ".debug_pubtypes", ".zdebug_pubtypes" }, + { ".debug_ranges", ".zdebug_ranges" }, + { ".debug_static_func", ".zdebug_static_func" }, + { ".debug_static_vars", ".zdebug_static_vars" }, + { ".debug_str", ".zdebug_str", }, + { ".debug_types", ".zdebug_types" }, + /* GNU DWARF 1 extensions */ + { ".debug_sfnames", ".zdebug_sfnames" }, + { ".debug_srcinfo", ".zebug_srcinfo" }, + /* SGI/MIPS DWARF 2 extensions */ + { ".debug_funcnames", ".zdebug_funcnames" }, + { ".debug_typenames", ".zdebug_typenames" }, + { ".debug_varnames", ".zdebug_varnames" }, + { ".debug_weaknames", ".zdebug_weaknames" }, + { NULL, NULL }, +}; + +enum dwarf_debug_section_enum +{ + debug_abbrev = 0, + debug_aranges, + debug_frame, + debug_info, + debug_line, + debug_loc, + debug_macinfo, + debug_pubnames, + debug_pubtypes, + debug_ranges, + debug_static_func, + debug_static_vars, + debug_str, + debug_types, + debug_sfnames, + debug_srcinfo, + debug_funcnames, + debug_typenames, + debug_varnames, + debug_weaknames +}; + #ifndef ABBREV_HASH_SIZE #define ABBREV_HASH_SIZE 121 #endif @@ -413,24 +467,23 @@ lookup_info_hash_table (struct info_hash_table *hash_table, const char *key) static bfd_boolean read_section (bfd * abfd, - const char * section_name, - const char * compressed_section_name, + enum dwarf_debug_section_enum sec, asymbol ** syms, bfd_uint64_t offset, bfd_byte ** section_buffer, bfd_size_type * section_size) { asection *msec; - bfd_boolean section_is_compressed = FALSE; + const char *section_name = dwarf_debug_sections[sec].uncompressed_name; /* read_section is a noop if the section has already been read. */ if (!*section_buffer) { msec = bfd_get_section_by_name (abfd, section_name); - if (! msec && compressed_section_name) + if (! msec) { - msec = bfd_get_section_by_name (abfd, compressed_section_name); - section_is_compressed = TRUE; + section_name = dwarf_debug_sections[sec].compressed_name; + msec = bfd_get_section_by_name (abfd, section_name); } if (! msec) { @@ -456,16 +509,6 @@ read_section (bfd * abfd, 0, *section_size)) return FALSE; } - - if (section_is_compressed) - { - if (! bfd_uncompress_section_contents (section_buffer, section_size)) - { - (*_bfd_error_handler) (_("Dwarf Error: unable to decompress %s section."), compressed_section_name); - bfd_set_error (bfd_error_bad_value); - return FALSE; - } - } } /* It is possible to get a bad value for the offset into the section @@ -561,8 +604,7 @@ read_indirect_string (struct comp_unit * unit, *bytes_read_ptr = unit->offset_size; - if (! read_section (unit->abfd, ".debug_str", ".zdebug_str", - stash->syms, offset, + if (! read_section (unit->abfd, debug_str, stash->syms, offset, &stash->dwarf_str_buffer, &stash->dwarf_str_size)) return NULL; @@ -644,8 +686,7 @@ read_abbrevs (bfd *abfd, bfd_uint64_t offset, struct dwarf2_debug *stash) unsigned int abbrev_form, hash_number; bfd_size_type amt; - if (! read_section (abfd, ".debug_abbrev", ".zdebug_abbrev", - stash->syms, offset, + if (! read_section (abfd, debug_abbrev, stash->syms, offset, &stash->dwarf_abbrev_buffer, &stash->dwarf_abbrev_size)) return NULL; @@ -1353,8 +1394,7 @@ decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash) unsigned char op_code, extended_op, adj_opcode; bfd_size_type amt; - if (! read_section (abfd, ".debug_line", ".zdebug_line", - stash->syms, unit->line_offset, + if (! read_section (abfd, debug_line, stash->syms, unit->line_offset, &stash->dwarf_line_buffer, &stash->dwarf_line_size)) return NULL; @@ -1769,8 +1809,7 @@ static bfd_boolean read_debug_ranges (struct comp_unit *unit) { struct dwarf2_debug *stash = unit->stash; - return read_section (unit->abfd, ".debug_ranges", ".zdebug_ranges", - stash->syms, 0, + return read_section (unit->abfd, debug_ranges, stash->syms, 0, &stash->dwarf_ranges_buffer, &stash->dwarf_ranges_size); } @@ -3192,86 +3231,37 @@ find_line (bfd *abfd, { /* Case 1: only one info section. */ total_size = msec->size; - if (! read_section (debug_bfd, ".debug_info", ".zdebug_info", - symbols, 0, + if (! read_section (debug_bfd, debug_info, symbols, 0, &stash->info_ptr_memory, &total_size)) goto done; } else { - int all_uncompressed = 1; + /* Case 2: multiple sections. */ for (total_size = 0; msec; msec = find_debug_info (debug_bfd, msec)) - { - total_size += msec->size; - if (strcmp (msec->name, DWARF2_COMPRESSED_DEBUG_INFO) == 0) - all_uncompressed = 0; - } - if (all_uncompressed) - { - /* Case 2: multiple sections, but none is compressed. */ - stash->info_ptr_memory = (bfd_byte *) bfd_malloc (total_size); - if (stash->info_ptr_memory == NULL) - goto done; - - total_size = 0; - for (msec = find_debug_info (debug_bfd, NULL); - msec; - msec = find_debug_info (debug_bfd, msec)) - { - bfd_size_type size; - - size = msec->size; - if (size == 0) - continue; + total_size += msec->size; - if (!(bfd_simple_get_relocated_section_contents - (debug_bfd, msec, stash->info_ptr_memory + total_size, - symbols))) - goto done; + stash->info_ptr_memory = (bfd_byte *) bfd_malloc (total_size); + if (stash->info_ptr_memory == NULL) + goto done; - total_size += size; - } - } - else + total_size = 0; + for (msec = find_debug_info (debug_bfd, NULL); + msec; + msec = find_debug_info (debug_bfd, msec)) { - /* Case 3: multiple sections, some or all compressed. */ - stash->info_ptr_memory = NULL; - total_size = 0; - for (msec = find_debug_info (debug_bfd, NULL); - msec; - msec = find_debug_info (debug_bfd, msec)) - { - bfd_size_type size = msec->size; - bfd_byte *buffer, *tmp; + bfd_size_type size; - if (size == 0) - continue; + size = msec->size; + if (size == 0) + continue; - buffer = (bfd_simple_get_relocated_section_contents - (debug_bfd, msec, NULL, symbols)); - if (! buffer) - goto done; + if (!(bfd_simple_get_relocated_section_contents + (debug_bfd, msec, stash->info_ptr_memory + total_size, + symbols))) + goto done; - if (strcmp (msec->name, DWARF2_COMPRESSED_DEBUG_INFO) == 0) - { - if (! bfd_uncompress_section_contents (&buffer, &size)) - { - free (buffer); - goto done; - } - } - tmp = (bfd_byte *) bfd_realloc (stash->info_ptr_memory, - total_size + size); - if (tmp == NULL) - { - free (buffer); - goto done; - } - stash->info_ptr_memory = tmp; - memcpy (stash->info_ptr_memory + total_size, buffer, size); - free (buffer); - total_size += size; - } + total_size += size; } } -- cgit v1.1