* objcopy.c (dump_sections): New list.
(command_line_switch): Add OPTION_DUMP_SECTION. (copy_options): Add dump-section. (copy_usage): Document new option. (copy_object): Dump requested sections. (copy_main): Handle --dump-section. * doc/binutils.texi: Document --dump-section option. * NEWS: Mention new feature.
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@ -1,3 +1,14 @@
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2013-12-31 Nick Clifton <nickc@redhat.com>
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* objcopy.c (dump_sections): New list.
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(command_line_switch): Add OPTION_DUMP_SECTION.
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(copy_options): Add dump-section.
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(copy_usage): Document new option.
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(copy_object): Dump requested sections.
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(copy_main): Handle --dump-section.
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* doc/binutils.texi: Document --dump-section option.
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* NEWS: Mention new feature.
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2013-12-20 Nick Clifton <nickc@redhat.com>
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PR binutils/16218
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@ -1,5 +1,7 @@
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-*- text -*-
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* Add --dump-section option to objcopy.
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* Add support for the Andes NDS32.
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Changes in 2.24:
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@ -1089,6 +1089,7 @@ objcopy [@option{-F} @var{bfdname}|@option{--target=}@var{bfdname}]
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[@option{--change-warnings}] [@option{--no-change-warnings}]
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[@option{--set-section-flags} @var{sectionpattern}=@var{flags}]
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[@option{--add-section} @var{sectionname}=@var{filename}]
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[@option{--dump-section} @var{sectionname}=@var{filename}]
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[@option{--rename-section} @var{oldname}=@var{newname}[,@var{flags}]]
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[@option{--long-section-names} @{enable,disable,keep@}]
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[@option{--change-leading-char}] [@option{--remove-leading-char}]
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@ -1475,6 +1476,17 @@ Add a new section named @var{sectionname} while copying the file. The
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contents of the new section are taken from the file @var{filename}. The
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size of the section will be the size of the file. This option only
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works on file formats which can support sections with arbitrary names.
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Note - it may be necessary to use the @option{--set-section-flags}
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option to set the attributes of the newly created section.
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@item --dump-section @var{sectionname}=@var{filename}
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Place the contents of section named @var{sectionname} into the file
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@var{filename}, overwriting any contents that may have been there
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previously. This option is the inverse of @option{--add-section}.
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This option is similar to the @option{--only-section} option except
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that it does not create a formatted file, it just dumps the contents
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as raw binary data, without applying any relocations. The option can
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be specified more than once.
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@item --rename-section @var{oldname}=@var{newname}[,@var{flags}]
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Rename a section from @var{oldname} to @var{newname}, optionally
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@ -186,6 +186,9 @@ struct section_add
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/* List of sections to add to the output BFD. */
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static struct section_add *add_sections;
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/* List of sections to dump from the output BFD. */
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static struct section_add *dump_sections;
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/* If non-NULL the argument to --add-gnu-debuglink.
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This should be the filename to store in the .gnu_debuglink section. */
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static const char * gnu_debuglink_filename = NULL;
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@ -259,6 +262,7 @@ static enum long_section_name_handling long_section_names = KEEP;
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enum command_line_switch
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{
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OPTION_ADD_SECTION=150,
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OPTION_DUMP_SECTION,
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OPTION_CHANGE_ADDRESSES,
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OPTION_CHANGE_LEADING_CHAR,
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OPTION_CHANGE_START,
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@ -377,6 +381,7 @@ static struct option copy_options[] =
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{"disable-deterministic-archives", no_argument, 0, 'U'},
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{"discard-all", no_argument, 0, 'x'},
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{"discard-locals", no_argument, 0, 'X'},
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{"dump-section", required_argument, 0, OPTION_DUMP_SECTION},
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{"enable-deterministic-archives", no_argument, 0, 'D'},
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{"extract-dwo", no_argument, 0, OPTION_EXTRACT_DWO},
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{"extract-symbol", no_argument, 0, OPTION_EXTRACT_SYMBOL},
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@ -548,6 +553,7 @@ copy_usage (FILE *stream, int exit_status)
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--set-section-flags <name>=<flags>\n\
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Set section <name>'s properties to <flags>\n\
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--add-section <name>=<file> Add section <name> found in <file> to output\n\
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--dump-section <name>=<file> Dump the contents of section <name> into <file>\n\
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--rename-section <old>=<new>[,<flags>] Rename section <old> to <new>\n\
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--long-section-names {enable|disable|keep}\n\
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Handle long section names in Coff objects.\n\
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@ -1826,6 +1832,59 @@ copy_object (bfd *ibfd, bfd *obfd, const bfd_arch_info_type *input_arch)
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}
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}
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if (dump_sections != NULL)
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{
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struct section_add * pdump;
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for (pdump = dump_sections; pdump != NULL; pdump = pdump->next)
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{
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asection * sec;
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sec = bfd_get_section_by_name (ibfd, pdump->name);
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if (sec == NULL)
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{
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bfd_nonfatal_message (NULL, ibfd, NULL,
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_("can't dump section '%s' - it does not exist"),
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pdump->name);
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continue;
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}
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if ((bfd_get_section_flags (ibfd, sec) & SEC_HAS_CONTENTS) == 0)
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{
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bfd_nonfatal_message (NULL, ibfd, sec,
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_("can't dump section - it has no contents"));
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continue;
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}
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bfd_size_type size = bfd_get_section_size (sec);
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if (size == 0)
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{
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bfd_nonfatal_message (NULL, ibfd, sec,
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_("can't dump section - it is empty"));
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continue;
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}
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FILE * f;
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f = fopen (pdump->filename, FOPEN_WB);
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if (f == NULL)
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{
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bfd_nonfatal_message (pdump->filename, NULL, NULL,
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_("could not open section dump file"));
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continue;
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}
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bfd_byte * contents = xmalloc (size);
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if (bfd_get_section_contents (ibfd, sec, contents, 0, size))
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fwrite (contents, 1, size, f);
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else
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bfd_nonfatal_message (NULL, ibfd, sec,
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_("could not retrieve section contents"));
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fclose (f);
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free (contents);
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}
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}
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if (gnu_debuglink_filename != NULL)
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{
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/* PR 15125: Give a helpful warning message if
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@ -3653,6 +3712,25 @@ copy_main (int argc, char *argv[])
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}
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break;
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case OPTION_DUMP_SECTION:
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{
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const char *s;
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struct section_add *pa;
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s = strchr (optarg, '=');
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if (s == NULL)
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fatal (_("bad format for %s"), "--dump-section");
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pa = (struct section_add *) xmalloc (sizeof * pa);
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pa->name = xstrndup (optarg, s - optarg);
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pa->filename = s + 1;
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pa->next = dump_sections;
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pa->contents = NULL;
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dump_sections = pa;
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}
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break;
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case OPTION_CHANGE_START:
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change_start = parse_vma (optarg, "--change-start");
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break;
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