Add new switch to objcopy: --add-gnu-debuglink=<file>
Allows packages to be shipped in two forms, a stripped executable and debug info file.
This commit is contained in:
Nick Clifton
parent
7d1ebfb2ed
commit
2593f09acc
@ -905,9 +905,15 @@ bfd_make_writable PARAMS ((bfd *abfd));
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bfd_boolean
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bfd_make_readable PARAMS ((bfd *abfd));
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unsigned long
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bfd_calc_gnu_debuglink_crc32 PARAMS ((unsigned long crc, const unsigned char *buf, bfd_size_type len));
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char *
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bfd_follow_gnu_debuglink PARAMS ((bfd *abfd, const char *dir));
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bfd_boolean
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bfd_add_gnu_debuglink PARAMS ((bfd * abfd, const char * filename));
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/* Extracted from libbfd.c. */
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/* Byte swapping macros for user section data. */
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161
bfd/opncls.c
161
bfd/opncls.c
@ -716,28 +716,32 @@ bfd_release (abfd, block)
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without debug symbols).
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*/
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static unsigned long calc_crc32 PARAMS ((unsigned long, const unsigned char *, size_t));
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static char * get_debug_link_info PARAMS ((bfd *, unsigned long *));
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static bfd_boolean separate_debug_file_exists PARAMS ((const char *, const unsigned long));
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static char * find_separate_debug_file PARAMS ((bfd *, const char *));
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#define GNU_DEBUGLINK ".gnu_debuglink"
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/*
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INTERNAL_FUNCTION
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calc_crc32
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FUNCTION
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bfd_calc_gnu_debuglink_crc32
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SYNOPSIS
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unsigned long calc_crc32 (unsigned long crc, const unsigned char *buf, size_t len);
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unsigned long bfd_calc_gnu_debuglink_crc32 (unsigned long crc, const unsigned char *buf, bfd_size_type len);
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DESCRIPTION
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Advance the CRC32 given by @var{crc} through @var{len}
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bytes of @var{buf}. Return the updated CRC32 value.
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Computes a CRC value as used in the .gnu_debuglink section.
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Advances the previously computed @var{crc} value by computing
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and adding in the crc32 for @var{len} bytes of @var{buf}.
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RETURNS
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Return the updated CRC32 value.
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*/
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static unsigned long
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calc_crc32 (crc, buf, len)
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unsigned long
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bfd_calc_gnu_debuglink_crc32 (crc, buf, len)
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unsigned long crc;
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const unsigned char *buf;
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size_t len;
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bfd_size_type len;
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{
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static const unsigned long crc32_table[256] =
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{
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@ -831,14 +835,17 @@ get_debug_link_info (abfd, crc32_out)
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BFD_ASSERT (abfd);
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BFD_ASSERT (crc32_out);
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sect = bfd_get_section_by_name (abfd, ".gnu_debuglink");
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sect = bfd_get_section_by_name (abfd, GNU_DEBUGLINK);
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if (sect == NULL)
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return NULL;
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debuglink_size = bfd_section_size (abfd, sect);
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contents = xmalloc (debuglink_size);
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contents = malloc (debuglink_size);
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if (contents == NULL)
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return NULL;
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ret = bfd_get_section_contents (abfd, sect, contents,
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(file_ptr)0, debuglink_size);
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if (! ret)
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@ -877,7 +884,7 @@ separate_debug_file_exists (name, crc)
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static char buffer [8 * 1024];
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unsigned long file_crc = 0;
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int fd;
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int count;
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bfd_size_type count;
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BFD_ASSERT (name);
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@ -886,7 +893,7 @@ separate_debug_file_exists (name, crc)
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return FALSE;
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while ((count = read (fd, buffer, sizeof (buffer))) > 0)
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file_crc = calc_crc32 (file_crc, buffer, count);
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file_crc = bfd_calc_gnu_debuglink_crc32 (file_crc, buffer, count);
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close (fd);
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@ -930,16 +937,21 @@ find_separate_debug_file (abfd, debug_file_directory)
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return NULL;
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basename = get_debug_link_info (abfd, & crc32);
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if (basename == NULL)
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return NULL;
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if (strlen (basename) < 1)
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{
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free (basename);
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return NULL;
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}
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dir = xstrdup (abfd->filename);
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dir = strdup (abfd->filename);
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if (dir == NULL)
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{
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free (basename);
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return NULL;
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}
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BFD_ASSERT (strlen (dir) != 0);
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/* Strip off filename part. */
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@ -950,11 +962,17 @@ find_separate_debug_file (abfd, debug_file_directory)
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dir[i + 1] = '\0';
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BFD_ASSERT (dir[i] == '/' || dir[0] == '\0')
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debugfile = xmalloc (strlen (debug_file_directory) + 1
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debugfile = malloc (strlen (debug_file_directory) + 1
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+ strlen (dir)
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+ strlen (".debug/")
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+ strlen (basename)
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+ 1);
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if (debugfile == NULL)
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{
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free (basename);
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free (dir);
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return NULL;
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}
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/* First try in the same directory as the original file: */
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strcpy (debugfile, dir);
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@ -1037,3 +1055,114 @@ bfd_follow_gnu_debuglink (abfd, dir)
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#endif
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return find_separate_debug_file (abfd, dir);
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}
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/*
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FUNCTION
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bfd_add_gnu_debuglink
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SYNOPSIS
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bfd_boolean bfd_add_gnu_debuglink (bfd * abfd, const char * filename);
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DESCRIPTION
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Takes a @var{BFD} and adds a .gnu_debuglink section containing a link
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to the specified @var{filename}. The filename should be relative to
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the current directory.
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RETURNS
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<<TRUE>> is returned if all is ok. Otherwise <<FALSE>> is returned
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and bfd_error is set.
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*/
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bfd_boolean
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bfd_add_gnu_debuglink (abfd, filename)
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bfd *abfd;
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const char * filename;
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{
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asection * sect;
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bfd_size_type debuglink_size;
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unsigned long crc32;
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char * contents;
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bfd_size_type crc_offset;
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FILE * handle;
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static char buffer[8 * 1024];
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size_t count;
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if (abfd == NULL || filename == NULL)
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{
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bfd_set_error (bfd_error_invalid_operation);
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return FALSE;
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}
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/* Make sure that we can read the file.
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XXX - Should we attempt to locate the debug info file using the same
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algorithm as gdb ? At the moment, since we are creating the
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.gnu_debuglink section, we insist upon the user providing us with a
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correct-for-section-creation-time path, but this need not conform to
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the gdb location algorithm. */
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handle = fopen (filename, FOPEN_RB);
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if (handle == NULL)
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{
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bfd_set_error (bfd_error_system_call);
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return FALSE;
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}
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crc32 = 0;
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while ((count = fread (buffer, 1, sizeof buffer, handle)) > 0)
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crc32 = bfd_calc_gnu_debuglink_crc32 (crc32, buffer, count);
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fclose (handle);
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/* Strip off any path components in filename,
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now that we no longer need them. */
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filename = lbasename (filename);
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sect = bfd_get_section_by_name (abfd, GNU_DEBUGLINK);
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if (sect)
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{
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/* Section already exists. */
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bfd_set_error (bfd_error_invalid_operation);
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return FALSE;
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}
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sect = bfd_make_section (abfd, GNU_DEBUGLINK);
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if (sect == NULL)
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return FALSE;
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if (! bfd_set_section_flags (abfd, sect,
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SEC_HAS_CONTENTS | SEC_DEBUGGING))
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/* XXX Should we delete the section from the bfd ? */
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return FALSE;
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debuglink_size = strlen (filename) + 1;
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debuglink_size += 3;
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debuglink_size &= ~3;
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debuglink_size += 4;
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if (! bfd_set_section_size (abfd, sect, debuglink_size))
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/* XXX Should we delete the section from the bfd ? */
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return FALSE;
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contents = malloc (debuglink_size);
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if (contents == NULL)
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{
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/* XXX Should we delete the section from the bfd ? */
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bfd_set_error (bfd_error_no_memory);
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return FALSE;
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}
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strcpy (contents, filename);
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crc_offset = debuglink_size - 4;
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bfd_put_32 (abfd, crc32, (bfd_byte *) (contents + crc_offset));
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if (! bfd_set_section_contents (abfd, sect, contents,
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(file_ptr)0, debuglink_size))
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{
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/* XXX Should we delete the section from the bfd ? */
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free (contents);
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return FALSE;
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}
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return TRUE;
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}
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@ -1,3 +1,21 @@
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2003-06-11 Nick Clifton <nickc@redhat.com>
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* objcopy.c (gnu_debuglink_filename): New variable.
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(OPTION_ADD_GNU_DEBUGLINK): New switch
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(copy_options): Describe --add-gnu-debuglink switch.
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Mention that --strip-debug removes sections as well.
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(is_strip_section): Process the sections removed and kept
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lists before checking for debugging sections.
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(add_redefine_syms_file): Make function static.
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(copy_object): Use is_strip_section.
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Check to see if a .gnu_debuglink section should be added. If
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so, call bfd_add_gnu_debuglink.
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(setup_section): Use is_strip_section.
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(copy_section): Use is_strip_section.
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(copy_main): Handle OPTION_ADD_GNU_DEBUGLINK.
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* NEWS: Mention new objcopy switch.
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* doc/binutils.texi: Document new switch.
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2003-06-11 H.J. Lu <hongjiu.lu@intel.com>
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* po/Make-in (DESTDIR): New.
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@ -1,5 +1,9 @@
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-*- text -*-
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* objcopy now accepts --add-gnu-debuglink=<file> to insert a .gnu_debuglink
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section into a (presumably stripped) executable. This allows the debug
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information for the file to be held in a seperate file.
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* BFD marks the sections .comment and .note as 'n' in the BSD/POSIX
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single-character representation. This can be checked by running nm
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with the -a switch.
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@ -932,21 +932,26 @@ objcopy [@option{-F} @var{bfdname}|@option{--target=}@var{bfdname}]
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[@option{-I} @var{bfdname}|@option{--input-target=}@var{bfdname}]
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[@option{-O} @var{bfdname}|@option{--output-target=}@var{bfdname}]
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[@option{-B} @var{bfdarch}|@option{--binary-architecture=}@var{bfdarch}]
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[@option{-S}|@option{--strip-all}] [@option{-g}|@option{--strip-debug}]
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[@option{-S}|@option{--strip-all}]
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[@option{-g}|@option{--strip-debug}]
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[@option{--add-gnu-debuglink=}@var{path-to-file}]
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[@option{-K} @var{symbolname}|@option{--keep-symbol=}@var{symbolname}]
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[@option{-N} @var{symbolname}|@option{--strip-symbol=}@var{symbolname}]
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[@option{-G} @var{symbolname}|@option{--keep-global-symbol=}@var{symbolname}]
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[@option{-L} @var{symbolname}|@option{--localize-symbol=}@var{symbolname}]
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[@option{-W} @var{symbolname}|@option{--weaken-symbol=}@var{symbolname}]
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[@option{-x}|@option{--discard-all}] [@option{-X}|@option{--discard-locals}]
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[@option{-x}|@option{--discard-all}]
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[@option{-X}|@option{--discard-locals}]
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[@option{-b} @var{byte}|@option{--byte=}@var{byte}]
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[@option{-i} @var{interleave}|@option{--interleave=}@var{interleave}]
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[@option{-j} @var{sectionname}|@option{--only-section=}@var{sectionname}]
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[@option{-R} @var{sectionname}|@option{--remove-section=}@var{sectionname}]
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[@option{-p}|@option{--preserve-dates}]
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[@option{--debugging}]
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[@option{--gap-fill=}@var{val}] [@option{--pad-to=}@var{address}]
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[@option{--set-start=}@var{val}] [@option{--adjust-start=}@var{incr}]
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[@option{--gap-fill=}@var{val}]
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[@option{--pad-to=}@var{address}]
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[@option{--set-start=}@var{val}]
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[@option{--adjust-start=}@var{incr}]
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[@option{--change-addresses=}@var{incr}]
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[@option{--change-section-address} @var{section}@{=,+,-@}@var{val}]
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[@option{--change-section-lma} @var{section}@{=,+,-@}@var{val}]
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@ -1069,11 +1074,15 @@ Do not copy relocation and symbol information from the source file.
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@item -g
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@itemx --strip-debug
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Do not copy debugging symbols from the source file.
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Do not copy debugging symbols or sections from the source file.
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@item --strip-unneeded
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Strip all symbols that are not needed for relocation processing.
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@item --add-gnu-debuglink=@var{path-to-file}
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Creates a .gnu_debuglink section which contains a reference to @var{path-to-file}
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and adds it to the output file.
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@item -K @var{symbolname}
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@itemx --keep-symbol=@var{symbolname}
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Copy only symbol @var{symbolname} from the source file. This option may
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@ -2057,7 +2066,8 @@ and the Info entries for @file{binutils}.
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strip [@option{-F} @var{bfdname} |@option{--target=}@var{bfdname}]
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[@option{-I} @var{bfdname} |@option{--input-target=}@var{bfdname}]
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[@option{-O} @var{bfdname} |@option{--output-target=}@var{bfdname}]
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[@option{-s}|@option{--strip-all}] [@option{-S}|@option{-g}|@option{-d}|@option{--strip-debug}]
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[@option{-s}|@option{--strip-all}]
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[@option{-S}|@option{-g}|@option{-d}|@option{--strip-debug}]
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[@option{-K} @var{symbolname} |@option{--keep-symbol=}@var{symbolname}]
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[@option{-N} @var{symbolname} |@option{--strip-symbol=}@var{symbolname}]
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[@option{-x}|@option{--discard-all}] [@option{-X} |@option{--discard-locals}]
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@ -110,6 +110,8 @@ static const char * find_section_rename
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PARAMS ((bfd *, sec_ptr, flagword *));
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static void add_section_rename
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PARAMS ((const char *, const char *, flagword));
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static void add_redefine_syms_file
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PARAMS ((const char *));
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#define RETURN_NONFATAL(s) {bfd_nonfatal (s); status = 1; return;}
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@ -217,6 +219,10 @@ 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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/* 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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/* Whether to convert debugging information. */
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static bfd_boolean convert_debugging = FALSE;
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@ -277,6 +283,7 @@ static char *prefix_alloc_sections_string = 0;
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#define OPTION_PREFIX_SECTIONS (OPTION_PREFIX_SYMBOLS + 1)
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#define OPTION_PREFIX_ALLOC_SECTIONS (OPTION_PREFIX_SECTIONS + 1)
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#define OPTION_FORMATS_INFO (OPTION_PREFIX_ALLOC_SECTIONS + 1)
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#define OPTION_ADD_GNU_DEBUGLINK (OPTION_FORMATS_INFO + 1)
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/* Options to handle if running as "strip". */
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@ -309,6 +316,7 @@ static struct option strip_options[] =
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static struct option copy_options[] =
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{
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{"add-gnu-debuglink", required_argument, 0, OPTION_ADD_GNU_DEBUGLINK},
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{"add-section", required_argument, 0, OPTION_ADD_SECTION},
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{"adjust-start", required_argument, 0, OPTION_CHANGE_START},
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{"adjust-vma", required_argument, 0, OPTION_CHANGE_ADDRESSES},
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@ -410,9 +418,10 @@ copy_usage (stream, exit_status)
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--debugging Convert debugging information, if possible\n\
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-p --preserve-dates Copy modified/access timestamps to the output\n\
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-j --only-section <name> Only copy section <name> into the output\n\
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--add-gnu-debuglink=<file> Add section .gnu_debuglink linking to <file>\n\
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-R --remove-section <name> Remove section <name> from the output\n\
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-S --strip-all Remove all symbol and relocation information\n\
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-g --strip-debug Remove all debugging symbols\n\
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-g --strip-debug Remove all debugging symbols & sections\n\
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--strip-unneeded Remove all symbols not needed by relocations\n\
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-N --strip-symbol <name> Do not copy symbol <name>\n\
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-K --keep-symbol <name> Only copy symbol <name>\n\
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@ -487,7 +496,7 @@ strip_usage (stream, exit_status)
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-p --preserve-dates Copy modified/access timestamps to the output\n\
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-R --remove-section=<name> Remove section <name> from the output\n\
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-s --strip-all Remove all symbol and relocation information\n\
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-g -S -d --strip-debug Remove all debugging symbols\n\
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-g -S -d --strip-debug Remove all debugging symbols & sections\n\
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--strip-unneeded Remove all symbols not needed by relocations\n\
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-N --strip-symbol=<name> Do not copy symbol <name>\n\
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-K --keep-symbol=<name> Only copy symbol <name>\n\
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@ -751,25 +760,29 @@ static bfd_boolean
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is_strip_section (abfd, sec)
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bfd *abfd ATTRIBUTE_UNUSED;
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asection *sec;
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{
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if (sections_removed || sections_copied)
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{
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struct section_list *p;
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if ((bfd_get_section_flags (abfd, sec) & SEC_DEBUGGING) != 0
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&& (strip_symbols == STRIP_DEBUG
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|| strip_symbols == STRIP_UNNEEDED
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|| strip_symbols == STRIP_ALL
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|| discard_locals == LOCALS_ALL
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|| convert_debugging))
|
||||
return TRUE;
|
||||
|
||||
if (! sections_removed && ! sections_copied)
|
||||
return FALSE;
|
||||
|
||||
p = find_section_list (bfd_get_section_name (abfd, sec), FALSE);
|
||||
|
||||
if (sections_removed && p != NULL && p->remove)
|
||||
return TRUE;
|
||||
if (sections_copied && (p == NULL || ! p->copy))
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
if ((bfd_get_section_flags (abfd, sec) & SEC_DEBUGGING) != 0)
|
||||
{
|
||||
if (strip_symbols == STRIP_DEBUG
|
||||
|| strip_symbols == STRIP_UNNEEDED
|
||||
|| strip_symbols == STRIP_ALL
|
||||
|| discard_locals == LOCALS_ALL
|
||||
|| convert_debugging)
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
@ -976,7 +989,7 @@ redefine_list_append (cause, source, target)
|
||||
/* Handle the --redefine-syms option. Read lines containing "old new"
|
||||
from the file, and add them to the symbol redefine list. */
|
||||
|
||||
void
|
||||
static void
|
||||
add_redefine_syms_file (filename)
|
||||
const char *filename;
|
||||
{
|
||||
@ -1182,6 +1195,8 @@ copy_object (ibfd, obfd)
|
||||
|
||||
for (padd = add_sections; padd != NULL; padd = padd->next)
|
||||
{
|
||||
flagword flags;
|
||||
|
||||
padd->section = bfd_make_section (obfd, padd->name);
|
||||
if (padd->section == NULL)
|
||||
{
|
||||
@ -1190,9 +1205,6 @@ copy_object (ibfd, obfd)
|
||||
status = 1;
|
||||
return;
|
||||
}
|
||||
else
|
||||
{
|
||||
flagword flags;
|
||||
|
||||
if (! bfd_set_section_size (obfd, padd->section, padd->size))
|
||||
RETURN_NONFATAL (bfd_get_filename (obfd));
|
||||
@ -1227,6 +1239,11 @@ copy_object (ibfd, obfd)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (gnu_debuglink_filename != NULL)
|
||||
{
|
||||
if (! bfd_add_gnu_debuglink (obfd, gnu_debuglink_filename))
|
||||
RETURN_NONFATAL (gnu_debuglink_filename);
|
||||
}
|
||||
|
||||
if (gap_fill_set || pad_to_set)
|
||||
@ -1761,23 +1778,13 @@ setup_section (ibfd, isection, obfdarg)
|
||||
const char * name;
|
||||
char *prefix = NULL;
|
||||
|
||||
if ((bfd_get_section_flags (ibfd, isection) & SEC_DEBUGGING) != 0
|
||||
&& (strip_symbols == STRIP_DEBUG
|
||||
|| strip_symbols == STRIP_UNNEEDED
|
||||
|| strip_symbols == STRIP_ALL
|
||||
|| discard_locals == LOCALS_ALL
|
||||
|| convert_debugging))
|
||||
if (is_strip_section (ibfd, isection))
|
||||
return;
|
||||
|
||||
p = find_section_list (bfd_section_name (ibfd, isection), FALSE);
|
||||
if (p != NULL)
|
||||
p->used = TRUE;
|
||||
|
||||
if (sections_removed && p != NULL && p->remove)
|
||||
return;
|
||||
if (sections_copied && (p == NULL || ! p->copy))
|
||||
return;
|
||||
|
||||
/* Get the, possibly new, name of the output section. */
|
||||
name = find_section_rename (ibfd, isection, & flags);
|
||||
|
||||
@ -1913,31 +1920,21 @@ copy_section (ibfd, isection, obfdarg)
|
||||
if (status != 0)
|
||||
return;
|
||||
|
||||
if (is_strip_section (ibfd, isection))
|
||||
return;
|
||||
|
||||
flags = bfd_get_section_flags (ibfd, isection);
|
||||
if ((flags & SEC_DEBUGGING) != 0
|
||||
&& (strip_symbols == STRIP_DEBUG
|
||||
|| strip_symbols == STRIP_UNNEEDED
|
||||
|| strip_symbols == STRIP_ALL
|
||||
|| discard_locals == LOCALS_ALL
|
||||
|| convert_debugging))
|
||||
return;
|
||||
|
||||
if ((flags & SEC_GROUP) != 0)
|
||||
return;
|
||||
|
||||
p = find_section_list (bfd_section_name (ibfd, isection), FALSE);
|
||||
|
||||
if (sections_removed && p != NULL && p->remove)
|
||||
return;
|
||||
if (sections_copied && (p == NULL || ! p->copy))
|
||||
return;
|
||||
|
||||
osection = isection->output_section;
|
||||
size = bfd_get_section_size_before_reloc (isection);
|
||||
|
||||
if (size == 0 || osection == 0)
|
||||
return;
|
||||
|
||||
p = find_section_list (bfd_get_section_name (ibfd, isection), FALSE);
|
||||
|
||||
/* Core files do not need to be relocated. */
|
||||
if (bfd_get_format (obfd) == bfd_core)
|
||||
relsize = 0;
|
||||
@ -2418,6 +2415,10 @@ copy_main (argc, argv)
|
||||
strip_symbols = STRIP_UNNEEDED;
|
||||
break;
|
||||
|
||||
case OPTION_ADD_GNU_DEBUGLINK:
|
||||
gnu_debuglink_filename = optarg;
|
||||
break;
|
||||
|
||||
case 'K':
|
||||
add_specific_symbol (optarg, &keep_specific_list);
|
||||
break;
|
||||
@ -2789,7 +2790,8 @@ copy_main (argc, argv)
|
||||
break;
|
||||
|
||||
case 0:
|
||||
break; /* we've been given a long option */
|
||||
/* We've been given a long option. */
|
||||
break;
|
||||
|
||||
case 'H':
|
||||
case 'h':
|
||||
|
||||
Loading…
Reference in New Issue
Block a user