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2000-07-27 H.J. Lu <hjl@gnu.org> 

* elflink.h (elf_merge_symbol): Take one more argument,
	dt_needed, to indicate if the symbol comes from a DT_NEEDED
	entry. Don't overide the existing weak definition if dt_needed
	is true.
	(elf_link_add_object_symbols): Pass dt_needed to
	elf_merge_symbol ().
This commit is contained in:
H.J. Lu 2000-07-28 00:49:07 +00:00
parent c6a7ab1f75
commit 456981d715
2 changed files with 32 additions and 11 deletions
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9
bfd/ChangeLog
View File

@ -1,3 +1,12 @@
2000-07-27 H.J. Lu <hjl@gnu.org>
* elflink.h (elf_merge_symbol): Take one more argument,
dt_needed, to indicate if the symbol comes from a DT_NEEDED
entry. Don't overide the existing weak definition if dt_needed
is true.
(elf_link_add_object_symbols): Pass dt_needed to
elf_merge_symbol ().
2000-07-27 Nick Clifton <nickc@cygnus.com>
* elflink.h (elf_link_size_reloc_section): Zeroes the section's

34
bfd/elflink.h
View File

@ -35,7 +35,7 @@ static boolean elf_link_add_archive_symbols
static boolean elf_merge_symbol
PARAMS ((bfd *, struct bfd_link_info *, const char *, Elf_Internal_Sym *,
asection **, bfd_vma *, struct elf_link_hash_entry **,
boolean *, boolean *, boolean *));
boolean *, boolean *, boolean *, boolean));
static boolean elf_export_symbol
PARAMS ((struct elf_link_hash_entry *, PTR));
static boolean elf_fix_symbol_flags
@ -433,11 +433,12 @@ elf_link_add_archive_symbols (abfd, info)
TYPE_CHANGE_OK if it is OK for the type to change. We set
SIZE_CHANGE_OK if it is OK for the size to change. By OK to
change, we mean that we shouldn't warn if the type or size does
change. */
change. DT_NEEDED indicates if it comes from a DT_NEEDED entry of
a shared object. */
static boolean
elf_merge_symbol (abfd, info, name, sym, psec, pvalue, sym_hash,
override, type_change_ok, size_change_ok)
override, type_change_ok, size_change_ok, dt_needed)
bfd *abfd;
struct bfd_link_info *info;
const char *name;
@ -448,6 +449,7 @@ elf_merge_symbol (abfd, info, name, sym, psec, pvalue, sym_hash,
boolean *override;
boolean *type_change_ok;
boolean *size_change_ok;
boolean dt_needed;
{
asection *sec;
struct elf_link_hash_entry *h;
@ -624,9 +626,11 @@ elf_merge_symbol (abfd, info, name, sym, psec, pvalue, sym_hash,
olddyncommon = false;
/* It's OK to change the type if either the existing symbol or the
new symbol is weak. */
new symbol is weak unless it comes from a DT_NEEDED entry of
a shared object, in which case, the DT_NEEDED entry may not be
required at the run time. */
if (h->root.type == bfd_link_hash_defweak
if ((! dt_needed && h->root.type == bfd_link_hash_defweak)
|| h->root.type == bfd_link_hash_undefweak
|| bind == STB_WEAK)
*type_change_ok = true;
@ -678,7 +682,9 @@ elf_merge_symbol (abfd, info, name, sym, psec, pvalue, sym_hash,
object to override a weak symbol in a shared object.
We prefer a non-weak definition in a shared library to a weak
definition in the executable. */
definition in the executable unless it comes from a DT_NEEDED
entry of a shared object, in which case, the DT_NEEDED entry
may not be required at the run time. */
if (newdyn
&& newdef
@ -686,7 +692,8 @@ elf_merge_symbol (abfd, info, name, sym, psec, pvalue, sym_hash,
|| (h->root.type == bfd_link_hash_common
&& (bind == STB_WEAK
|| ELF_ST_TYPE (sym->st_info) == STT_FUNC)))
&& (h->root.type != bfd_link_hash_defweak
&& (h->root.type != bfd_link_hash_defweak
|| dt_needed
|| bind == STB_WEAK))
{
*override = true;
@ -821,8 +828,11 @@ elf_merge_symbol (abfd, info, name, sym, psec, pvalue, sym_hash,
/* Handle the special case of a weak definition in a regular object
followed by a non-weak definition in a shared object. In this
case, we prefer the definition in the shared object. */
case, we prefer the definition in the shared object unless it
comes from a DT_NEEDED entry of a shared object, in which case,
the DT_NEEDED entry may not be required at the run time. */
if (olddef
&& ! dt_needed
&& h->root.type == bfd_link_hash_defweak
&& newdef
&& newdyn
@ -1465,7 +1475,7 @@ elf_link_add_object_symbols (abfd, info)
if (! elf_merge_symbol (abfd, info, name, &sym, &sec, &value,
sym_hash, &override, &type_change_ok,
&size_change_ok))
&size_change_ok, dt_needed))
goto error_return;
if (override)
@ -1668,7 +1678,8 @@ elf_link_add_object_symbols (abfd, info)
size_change_ok = false;
if (! elf_merge_symbol (abfd, info, shortname, &sym, &sec,
&value, &hi, &override,
&type_change_ok, &size_change_ok))
&type_change_ok,
&size_change_ok, dt_needed))
goto error_return;
if (! override)
@ -1785,7 +1796,8 @@ elf_link_add_object_symbols (abfd, info)
size_change_ok = false;
if (! elf_merge_symbol (abfd, info, shortname, &sym, &sec,
&value, &hi, &override,
&type_change_ok, &size_change_ok))
&type_change_ok,
&size_change_ok, dt_needed))
goto error_return;
if (override)