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-rw-r--r--binutils/objcopy.c101
1 files changed, 96 insertions, 5 deletions
diff --git a/binutils/objcopy.c b/binutils/objcopy.c
index f9fe06b..9bad4b7 100644
--- a/binutils/objcopy.c
+++ b/binutils/objcopy.c
@@ -321,6 +321,7 @@ enum command_line_switch
OPTION_LOCALIZE_SYMBOLS,
OPTION_LONG_SECTION_NAMES,
OPTION_MERGE_NOTES,
+ OPTION_NO_MERGE_NOTES,
OPTION_NO_CHANGE_WARNINGS,
OPTION_ONLY_KEEP_DEBUG,
OPTION_PAD_TO,
@@ -368,6 +369,8 @@ static struct option strip_options[] =
{"input-target", required_argument, 0, 'I'},
{"keep-file-symbols", no_argument, 0, OPTION_KEEP_FILE_SYMBOLS},
{"keep-symbol", required_argument, 0, 'K'},
+ {"merge-notes", no_argument, 0, 'M'},
+ {"no-merge-notes", no_argument, 0, OPTION_NO_MERGE_NOTES},
{"only-keep-debug", no_argument, 0, OPTION_ONLY_KEEP_DEBUG},
{"output-file", required_argument, 0, 'o'},
{"output-format", required_argument, 0, 'O'}, /* Obsolete */
@@ -443,6 +446,7 @@ static struct option copy_options[] =
{"localize-symbols", required_argument, 0, OPTION_LOCALIZE_SYMBOLS},
{"long-section-names", required_argument, 0, OPTION_LONG_SECTION_NAMES},
{"merge-notes", no_argument, 0, 'M'},
+ {"no-merge-notes", no_argument, 0, OPTION_NO_MERGE_NOTES},
{"no-adjust-warnings", no_argument, 0, OPTION_NO_CHANGE_WARNINGS},
{"no-change-warnings", no_argument, 0, OPTION_NO_CHANGE_WARNINGS},
{"only-keep-debug", no_argument, 0, OPTION_ONLY_KEEP_DEBUG},
@@ -642,6 +646,7 @@ copy_usage (FILE *stream, int exit_status)
--elf-stt-common=[yes|no] Generate ELF common symbols with STT_COMMON\n\
type\n\
-M --merge-notes Remove redundant entries in note sections\n\
+ --no-merge-notes Do not attempt to remove redundant notes (default)\n\
-v --verbose List all object files modified\n\
@<file> Read options from <file>\n\
-V --version Display this program's version number\n\
@@ -686,6 +691,8 @@ strip_usage (FILE *stream, int exit_status)
--strip-dwo Remove all DWO sections\n\
--strip-unneeded Remove all symbols not needed by relocations\n\
--only-keep-debug Strip everything but the debug information\n\
+ -M --merge-notes Remove redundant entries in note sections (default)\n\
+ --no-merge-notes Do not attempt to remove redundant notes\n\
-N --strip-symbol=<name> Do not copy symbol <name>\n\
-K --keep-symbol=<name> Do not strip symbol <name>\n\
--keep-file-symbols Do not strip file symbol(s)\n\
@@ -1882,6 +1889,22 @@ copy_unknown_object (bfd *ibfd, bfd *obfd)
return TRUE;
}
+/* Returns the number of bytes needed to store VAL. */
+
+static inline unsigned int
+num_bytes (unsigned long val)
+{
+ unsigned int count = 0;
+
+ /* FIXME: There must be a faster way to do this. */
+ while (val)
+ {
+ count ++;
+ val >>= 8;
+ }
+ return count;
+}
+
/* Merge the notes on SEC, removing redundant entries.
Returns the new, smaller size of the section upon success. */
@@ -1899,7 +1922,7 @@ merge_gnu_build_notes (bfd * abfd, asection * sec, bfd_size_type size, bfd_byte
/* Make a copy of the notes.
Minimum size of a note is 12 bytes. */
- pnote = pnotes = (Elf_Internal_Note *) xmalloc ((size / 12) * sizeof (Elf_Internal_Note));
+ pnote = pnotes = (Elf_Internal_Note *) xcalloc ((size / 12), sizeof (Elf_Internal_Note));
while (remain >= 12)
{
pnote->namesz = (bfd_get_32 (abfd, in ) + 3) & ~3;
@@ -1939,6 +1962,12 @@ merge_gnu_build_notes (bfd * abfd, asection * sec, bfd_size_type size, bfd_byte
remain -= 12 + pnote->namesz + pnote->descsz;
in += 12 + pnote->namesz + pnote->descsz;
+ if (pnote->namedata[pnote->namesz - 1] != 0)
+ {
+ err = _("corrupt GNU build attribute note: name not NUL terminated");
+ goto done;
+ }
+
if (pnote->namesz > 1 && pnote->namedata[1] == GNU_BUILD_ATTRIBUTE_VERSION)
++ version_notes_seen;
pnote ++;
@@ -1983,7 +2012,9 @@ merge_gnu_build_notes (bfd * abfd, asection * sec, bfd_size_type size, bfd_byte
3. Eliminate any NT_GNU_BUILD_ATTRIBUTE_OPEN notes that have the same
full name field as the immediately preceeding note with the same type
of name.
- 4. If an NT_GNU_BUILD_ATTRIBUTE_OPEN note is going to be preserved and
+ 4. Combine the numeric value of any NT_GNU_BUILD_ATTRIBUTE_OPEN notes
+ of type GNU_BUILD_ATTRIBUTE_STACK_SIZE.
+ 5. If an NT_GNU_BUILD_ATTRIBUTE_OPEN note is going to be preserved and
its description field is empty then the nearest preceeding OPEN note
with a non-empty description field must also be preserved *OR* the
description field of the note must be changed to contain the starting
@@ -2008,6 +2039,54 @@ merge_gnu_build_notes (bfd * abfd, asection * sec, bfd_size_type size, bfd_byte
if (back->type == pnote->type
&& back->namedata[1] == pnote->namedata[1])
{
+ if (back->namedata[1] == GNU_BUILD_ATTRIBUTE_STACK_SIZE)
+ {
+ unsigned char * name;
+ unsigned long note_val;
+ unsigned long back_val;
+ unsigned int shift;
+ unsigned int bytes;
+ unsigned long byte;
+
+ for (shift = 0, note_val = 0, bytes = pnote->namesz - 2, name = (unsigned char *) pnote->namedata + 2;
+ bytes--;)
+ {
+ byte = (* name ++) & 0xff;
+ note_val |= byte << shift;
+ shift += 8;
+ }
+ for (shift = 0, back_val = 0, bytes = back->namesz - 2, name = (unsigned char *) back->namedata + 2;
+ bytes--;)
+ {
+ byte = (* name ++) & 0xff;
+ back_val |= byte << shift;
+ shift += 8;
+ }
+ back_val += note_val;
+ if (num_bytes (back_val) >= back->namesz - 2)
+ {
+ /* We have a problem - the new value requires more bytes of
+ storage in the name field than are available. Currently
+ we have no way of fixing this, so we just preserve both
+ notes. */
+ continue;
+ }
+ /* Write the new val into back. */
+ name = (unsigned char *) back->namedata + 2;
+ while (name < (unsigned char *) back->namedata + back->namesz)
+ {
+ byte = back_val & 0xff;
+ * name ++ = byte;
+ if (back_val == 0)
+ break;
+ back_val >>= 8;
+ }
+
+ duplicate_found = TRUE;
+ pnote->type = 0;
+ break;
+ }
+
if (back->namesz == pnote->namesz
&& memcmp (back->namedata, pnote->namedata, back->namesz) == 0)
{
@@ -2018,10 +2097,11 @@ merge_gnu_build_notes (bfd * abfd, asection * sec, bfd_size_type size, bfd_byte
/* If we have found an attribute match then stop searching backwards. */
if (! ISPRINT (back->namedata[1])
+ /* Names are NUL terminated, so this is safe. */
|| strcmp (back->namedata + 2, pnote->namedata + 2) == 0)
{
/* Since we are keeping this note we must check to see if its
- description refers back to an earlier OPEN note. If so
+ description refers back to an earlier OPEN version note. If so
then we must make sure that version note is also preserved. */
if (pnote->descsz == 0
&& prev_open != NULL
@@ -2821,8 +2901,8 @@ copy_object (bfd *ibfd, bfd *obfd, const bfd_arch_info_type *input_arch)
return FALSE;
}
}
- else
- bfd_nonfatal_message (NULL, obfd, osec, _("ICE: lost merged note section"));
+ else if (! is_strip)
+ bfd_nonfatal_message (NULL, obfd, osec, _("could not find any mergeable note sections"));
free (merged_notes);
merged_notes = NULL;
merge_notes = FALSE;
@@ -4023,6 +4103,8 @@ strip_main (int argc, char *argv[])
int i;
char *output_file = NULL;
+ merge_notes = TRUE;
+
while ((c = getopt_long (argc, argv, "I:O:F:K:N:R:o:sSpdgxXHhVvwDU",
strip_options, (int *) 0)) != EOF)
{
@@ -4060,6 +4142,12 @@ strip_main (int argc, char *argv[])
case 'K':
add_specific_symbol (optarg, keep_specific_htab);
break;
+ case 'M':
+ merge_notes = TRUE;
+ break;
+ case OPTION_NO_MERGE_NOTES:
+ merge_notes = FALSE;
+ break;
case 'N':
add_specific_symbol (optarg, strip_specific_htab);
break;
@@ -4486,6 +4574,9 @@ copy_main (int argc, char *argv[])
case 'M':
merge_notes = TRUE;
break;
+ case OPTION_NO_MERGE_NOTES:
+ merge_notes = FALSE;
+ break;
case 'N':
add_specific_symbol (optarg, strip_specific_htab);
generated by cgit v1.1 at 2024-12-16 08:52:05 +0000