rsrc_sort_entries (& adir->ids, FALSE, adir);
}
+static bfd_byte *
+rsrc_align (bfd * abfd, bfd_byte * data, bfd_byte * dataend)
+{
+ ptrdiff_t d;
+
+ /* Align the data pointer - we no longer have access to the original sections
+ so we do not know the alignment value they used. We default to 1^2 alignment
+ but check to see if 1^3 is better. */
+ d = (ptrdiff_t) data;
+ d = (d + 3) & ~3;
+
+ if ((bfd_byte *) d == (dataend - 4))
+ return dataend;
+
+ if ((d & 0x4) == 0)
+ return (bfd_byte *) d;
+
+ /* Aligning to 1^3 would change the value of the pointer. See if the
+ next 16 bytes (without aligning to 1^3) would form a valid Resource
+ Directory Table. If not then increase the alignment. */
+ data = (bfd_byte *) d;
+
+ if (data + 16 >= dataend)
+ /* Not enough room left for a resource table anyway. Just stop. */
+ return dataend;
+
+ if (bfd_get_32 (abfd, data) != 0)
+ /* A non-zero characteristics field. This should not happen.
+ Possibly the padding between merged .rsrc sections was not zero.
+ Choose to advance the pointer. */
+ return (bfd_byte *) (d + 4);
+
+ if (bfd_get_32 (abfd, data + 4) != 0)
+ /* A non-zero time field. It cannot be the characteristics field
+ of a 1^3 aligned .rsrc section because the characteristics are
+ always zero. Hence we should not increase the alignment. */
+ return (bfd_byte *) d;
+
+ /* Looking at bytes 8..11 does not help. These are either the time stamp
+ or the version fields. They can both have arbitary values, and zero
+ is quite commmon, so we have no way to distinguish them. */
+
+ /* Bytes 12..15 are either the version values or the number of entries
+ to follow. If the value is zero then this must be the version fields,
+ since we must always have at least one entry. A non-zero value on the
+ other hand is ambiguous. */
+ if (bfd_get_32 (abfd, data + 12) == 0)
+ return (bfd_byte *) (d + 4);
+
+ /* Ho Hum, we have no easy way to resolve this problem, so punt for now.
+ FIXME: try parsing the entire remaining .rsrc section. If it fails,
+ try re-aligning data and reparsing. If that works go with the new
+ alignment. Note - this has the potential to be dangerously recursive. */
+
+ return (bfd_byte *) d;
+}
+
/* Check the .rsrc section. If it contains multiple concatenated
resources then we must merge them properly. Otherwise Windows
will ignore all but the first set. */
/* Step one: Walk the section, computing the size of the tables,
leaves and data and decide if we need to do anything. */
- dataend = data + size;
+ dataend = data + size;
num_resource_sets = 0;
sizeof_leaves = sizeof_strings = sizeof_tables_and_entries = 0;
bfd_byte * p = data;
data = rsrc_count_directory (abfd, data, data, dataend, rva_bias);
+
if (data > dataend)
{
/* Corrupted .rsrc section - cannot merge. */
goto end;
}
- /* Align the data pointer - we assume 1^2 alignment. */
- data = (bfd_byte *) (((ptrdiff_t) (data + 3)) & ~ 3);
+ data = rsrc_align (abfd, data, dataend);
rva_bias += data - p;
-
- if (data == (dataend - 4))
- data = dataend;
-
++ num_resource_sets;
}
data = rsrc_parse_directory (abfd, type_tables + indx, data, data,
dataend, rva_bias, NULL);
- data = (bfd_byte *) (((ptrdiff_t) (data + 3)) & ~ 3);
+ data = rsrc_align (abfd, data, dataend);
rva_bias += data - p;
- if (data == (dataend - 4))
- data = dataend;
indx ++;
}
BFD_ASSERT (indx == num_resource_sets);
projects / deliverable / binutils-gdb.git / commitdiff
