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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.
This commit is contained in:
Joseph Myers 2010-11-04 11:35:01 +00:00
parent 608bcef267
commit e8b36cd1e5
5 changed files with 163 additions and 106 deletions
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17
bfd/ChangeLog
View File

@ -1,3 +1,20 @@
2010-11-04 Joseph Myers <joseph@codesourcery.com>
* 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.
2010-11-02 H.J. Lu <hongjiu.lu@intel.com>
* bfd.c (BFD_FLAGS_FOR_BFD_USE_MASK): New.

111
bfd/elf-attrs.c
View File

@ -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;
}

6
bfd/elf-bfd.h
View File

@ -1256,6 +1256,10 @@ struct elf_backend_data
actual tag number to place in the input position. */
int (*obj_attrs_order) (int);
/* Handle merging unknown attributes; either warn and return TRUE,
or give an error and return FALSE. */
bfd_boolean (*obj_attrs_handle_unknown) (bfd *, int);
/* This is non-zero if static TLS segments require a special alignment. */
unsigned static_tls_alignment;
@ -2235,6 +2239,8 @@ extern void _bfd_elf_copy_obj_attributes (bfd *, bfd *);
extern int _bfd_elf_obj_attrs_arg_type (bfd *, int, int);
extern void _bfd_elf_parse_attributes (bfd *, Elf_Internal_Shdr *);
extern bfd_boolean _bfd_elf_merge_object_attributes (bfd *, bfd *);
extern bfd_boolean _bfd_elf_merge_unknown_attribute_low (bfd *, bfd *, int);
extern bfd_boolean _bfd_elf_merge_unknown_attribute_list (bfd *, bfd *);
extern Elf_Internal_Shdr *_bfd_elf_single_rel_hdr (asection *sec);
/* The linker may needs to keep track of the number of relocs that it

131
bfd/elf32-arm.c
View File

@ -9653,6 +9653,27 @@ elf32_arm_obj_attrs_order (int num)
return num;
}
/* Attribute numbers >=64 (mod 128) can be safely ignored. */
static bfd_boolean
elf32_arm_obj_attrs_handle_unknown (bfd *abfd, int tag)
{
if ((tag & 127) < 64)
{
_bfd_error_handler
(_("%B: Unknown mandatory EABI object attribute %d"),
abfd, tag);
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
else
{
_bfd_error_handler
(_("Warning: %B: Unknown EABI object attribute %d"),
abfd, tag);
return TRUE;
}
}
/* Read the architecture from the Tag_also_compatible_with attribute, if any.
Returns -1 if no architecture could be read. */
@ -10382,45 +10403,8 @@ elf32_arm_merge_eabi_attributes (bfd *ibfd, bfd *obfd)
break;
default:
{
bfd *err_bfd = NULL;
/* The "known_obj_attributes" table does contain some undefined
attributes. Ensure that there are unused. */
if (out_attr[i].i != 0 || out_attr[i].s != NULL)
err_bfd = obfd;
else if (in_attr[i].i != 0 || in_attr[i].s != NULL)
err_bfd = ibfd;
if (err_bfd != NULL)
{
/* Attribute numbers >=64 (mod 128) can be safely ignored. */
if ((i & 127) < 64)
{
_bfd_error_handler
(_("%B: Unknown mandatory EABI object attribute %d"),
err_bfd, i);
bfd_set_error (bfd_error_bad_value);
result = FALSE;
}
else
{
_bfd_error_handler
(_("Warning: %B: Unknown EABI object attribute %d"),
err_bfd, i);
}
}
/* Only pass on attributes that match in both inputs. */
if (in_attr[i].i != out_attr[i].i
|| in_attr[i].s != out_attr[i].s
|| (in_attr[i].s != NULL && out_attr[i].s != NULL
&& strcmp (in_attr[i].s, out_attr[i].s) != 0))
{
out_attr[i].i = 0;
out_attr[i].s = NULL;
}
}
result
= result && _bfd_elf_merge_unknown_attribute_low (ibfd, obfd, i);
}
/* If out_attr was copied from in_attr then it won't have a type yet. */
@ -10437,74 +10421,8 @@ elf32_arm_merge_eabi_attributes (bfd *ibfd, bfd *obfd)
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;
result &= _bfd_elf_merge_unknown_attribute_list (ibfd, obfd);
/* 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)
{
/* Attribute numbers >=64 (mod 128) can be safely ignored. */
if ((err_tag & 127) < 64)
{
_bfd_error_handler
(_("%B: Unknown mandatory EABI object attribute %d"),
err_bfd, err_tag);
bfd_set_error (bfd_error_bad_value);
result = FALSE;
}
else
{
_bfd_error_handler
(_("Warning: %B: Unknown EABI object attribute %d"),
err_bfd, err_tag);
}
}
}
return result;
}
@ -13977,6 +13895,7 @@ const struct elf_size_info elf32_arm_size_info =
#undef elf_backend_obj_attrs_section_type
#define elf_backend_obj_attrs_section_type SHT_ARM_ATTRIBUTES
#define elf_backend_obj_attrs_order elf32_arm_obj_attrs_order
#define elf_backend_obj_attrs_handle_unknown elf32_arm_obj_attrs_handle_unknown
#include "elf32-target.h"

4
bfd/elfxx-target.h
View File

@ -477,6 +477,9 @@
#ifndef elf_backend_obj_attrs_order
#define elf_backend_obj_attrs_order NULL
#endif
#ifndef elf_backend_obj_attrs_handle_unknown
#define elf_backend_obj_attrs_handle_unknown NULL
#endif
#ifndef elf_backend_static_tls_alignment
#define elf_backend_static_tls_alignment 1
#endif
@ -741,6 +744,7 @@ static struct elf_backend_data elfNN_bed =
elf_backend_obj_attrs_arg_type,
elf_backend_obj_attrs_section_type,
elf_backend_obj_attrs_order,
elf_backend_obj_attrs_handle_unknown,
elf_backend_static_tls_alignment,
elf_backend_collect,
elf_backend_type_change_ok,