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authorJoseph Myers <joseph@codesourcery.com>2010-11-04 11:35:01 +0000
committerJoseph Myers <joseph@codesourcery.com>2010-11-04 11:35:01 +0000
commite8b36cd1e57055ea2eb1e2ba2692f1ec520b34db (patch)
tree317666abafb1d4aa2ff281b3b31f9d8c59ecd8a8 /bfd/elf-attrs.c
parent608bcef2676e2019d046ff7a485c47fd0b8606bd (diff)
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* elf-attrs.c (_bfd_elf_merge_unknown_attribute_low,
_bfd_elf_merge_unknown_attribute_list): New. * elf-bfd.h (struct elf_backend_data): Add obj_attrs_handle_unknown. (_bfd_elf_merge_unknown_attribute_low, _bfd_elf_merge_unknown_attribute_list): Declare. * elf32-arm.c (elf32_arm_obj_attrs_handle_unknown): New. Split out from elf32_arm_merge_eabi_attributes. (elf32_arm_merge_eabi_attributes): Use _bfd_elf_merge_unknown_attribute_low and _bfd_elf_merge_unknown_attribute_list. (elf_backend_obj_attrs_handle_unknown): Define. * elfxx-target.h (elf_backend_obj_attrs_handle_unknown): Define. (elfNN_bed): Update initializer.
Diffstat (limited to 'bfd/elf-attrs.c')
-rw-r--r--bfd/elf-attrs.c111
1 files changed, 111 insertions, 0 deletions
diff --git a/bfd/elf-attrs.c b/bfd/elf-attrs.c
index b9d3bf2..e1893d3 100644
--- a/bfd/elf-attrs.c
+++ b/bfd/elf-attrs.c
@@ -586,3 +586,114 @@ _bfd_elf_merge_object_attributes (bfd *ibfd, bfd *obfd)
return TRUE;
}
+
+/* Merge an unknown processor-specific attribute TAG, within the range
+ of known attributes, from IBFD into OBFD; return TRUE if the link
+ is OK, FALSE if it must fail. */
+
+bfd_boolean
+_bfd_elf_merge_unknown_attribute_low (bfd *ibfd, bfd *obfd, int tag)
+{
+ obj_attribute *in_attr;
+ obj_attribute *out_attr;
+ bfd *err_bfd = NULL;
+ bfd_boolean result = TRUE;
+
+ in_attr = elf_known_obj_attributes_proc (ibfd);
+ out_attr = elf_known_obj_attributes_proc (obfd);
+
+ if (out_attr[tag].i != 0 || out_attr[tag].s != NULL)
+ err_bfd = obfd;
+ else if (in_attr[tag].i != 0 || in_attr[tag].s != NULL)
+ err_bfd = ibfd;
+
+ if (err_bfd != NULL)
+ result
+ = get_elf_backend_data (err_bfd)->obj_attrs_handle_unknown (err_bfd, tag);
+
+ /* Only pass on attributes that match in both inputs. */
+ if (in_attr[tag].i != out_attr[tag].i
+ || in_attr[tag].s != out_attr[tag].s
+ || (in_attr[tag].s != NULL && out_attr[tag].s != NULL
+ && strcmp (in_attr[tag].s, out_attr[tag].s) != 0))
+ {
+ out_attr[tag].i = 0;
+ out_attr[tag].s = NULL;
+ }
+
+ return result;
+}
+
+/* Merge the lists of unknown processor-specific attributes, outside
+ the known range, from IBFD into OBFD; return TRUE if the link is
+ OK, FALSE if it must fail. */
+
+bfd_boolean
+_bfd_elf_merge_unknown_attribute_list (bfd *ibfd, bfd *obfd)
+{
+ obj_attribute_list *in_list;
+ obj_attribute_list *out_list;
+ obj_attribute_list **out_listp;
+ bfd_boolean result = TRUE;
+
+ in_list = elf_other_obj_attributes_proc (ibfd);
+ out_listp = &elf_other_obj_attributes_proc (obfd);
+ out_list = *out_listp;
+
+ for (; in_list || out_list; )
+ {
+ bfd *err_bfd = NULL;
+ int err_tag = 0;
+
+ /* The tags for each list are in numerical order. */
+ /* If the tags are equal, then merge. */
+ if (out_list && (!in_list || in_list->tag > out_list->tag))
+ {
+ /* This attribute only exists in obfd. We can't merge, and we don't
+ know what the tag means, so delete it. */
+ err_bfd = obfd;
+ err_tag = out_list->tag;
+ *out_listp = out_list->next;
+ out_list = *out_listp;
+ }
+ else if (in_list && (!out_list || in_list->tag < out_list->tag))
+ {
+ /* This attribute only exists in ibfd. We can't merge, and we don't
+ know what the tag means, so ignore it. */
+ err_bfd = ibfd;
+ err_tag = in_list->tag;
+ in_list = in_list->next;
+ }
+ else /* The tags are equal. */
+ {
+ /* As present, all attributes in the list are unknown, and
+ therefore can't be merged meaningfully. */
+ err_bfd = obfd;
+ err_tag = out_list->tag;
+
+ /* Only pass on attributes that match in both inputs. */
+ if (in_list->attr.i != out_list->attr.i
+ || in_list->attr.s != out_list->attr.s
+ || (in_list->attr.s && out_list->attr.s
+ && strcmp (in_list->attr.s, out_list->attr.s) != 0))
+ {
+ /* No match. Delete the attribute. */
+ *out_listp = out_list->next;
+ out_list = *out_listp;
+ }
+ else
+ {
+ /* Matched. Keep the attribute and move to the next. */
+ out_list = out_list->next;
+ in_list = in_list->next;
+ }
+ }
+
+ if (err_bfd)
+ result = result
+ && get_elf_backend_data (err_bfd)->obj_attrs_handle_unknown (err_bfd,
+ err_tag);
+ }
+
+ return result;
+}