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more XCOFF linker hackery

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This commit is contained in:
Ian Lance Taylor 1995-11-08 19:08:18 +00:00
parent 73c4941b23
commit 417acf225f
2 changed files with 59 additions and 24 deletions
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3
bfd/ChangeLog
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@ -6,8 +6,11 @@ Wed Nov 8 11:31:11 1995 Ian Lance Taylor <ian@cygnus.com>
(xcoff_swap_ldsym_in): New static function.
(xcoff_link_add_symbols): If we just created a descriptor, pass it
to _bfd_generic_link_add_one_symbol, to save a hash lookup.
Handle XTY_ER/XMC_XO symbols correctly.
(xcoff_link_add_dynamic_symbols): Rewrite to read .loader symbols
rather than normal symbol table.
(bfd_xcoff_import_symbol): It's not an error if the symbol is
already defined with the same absolute value.
(xcoff_mark): When considering called symbols, check whether the
descriptor is from a dynamic object, rather than the symbol
itself.

80
bfd/xcofflink.c
View File

@ -1263,7 +1263,16 @@ xcoff_link_add_symbols (abfd, info)
bfd_set_error (bfd_error_bad_value);
goto error_return;
}
section = bfd_und_section_ptr;
/* An XMC_XO external reference is actually a reference to
an absolute location. */
if (aux.x_csect.x_smclas != XMC_XO)
section = bfd_und_section_ptr;
else
{
section = bfd_abs_section_ptr;
value = sym.n_value;
}
break;
case XTY_SD:
@ -1931,12 +1940,6 @@ xcoff_link_add_dynamic_symbols (abfd, info)
if ((ldsym.l_smtype & L_EXPORT) == 0)
continue;
/* All we have to do is look up the symbol in the hash table.
If it's not there, we just won't import it. Normally we
could not xcoff_link_hash_lookup in an add symbols routine,
since we might not be using an XCOFF hash table. However, we
verified above that we are using an XCOFF hash table. */
if (ldsym._l._l_l._l_zeroes == 0)
name = strings + ldsym._l._l_l._l_offset;
else
@ -1946,25 +1949,52 @@ xcoff_link_add_dynamic_symbols (abfd, info)
name = nambuf;
}
h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, false,
false, true);
if (h != NULL)
/* Normally we could not xcoff_link_hash_lookup in an add
symbols routine, since we might not be using an XCOFF hash
table. However, we verified above that we are using an XCOFF
hash table. */
h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, true,
true, true);
if (h == NULL)
goto error_return;
h->flags |= XCOFF_DEF_DYNAMIC;
/* If the symbol is undefined, and the BFD it was found in is
not a dynamic object, change the BFD to this dynamic object,
so that we can get the correct import file ID. */
if ((h->root.type == bfd_link_hash_undefined
|| h->root.type == bfd_link_hash_undefweak)
&& (h->root.u.undef.abfd == NULL
|| (h->root.u.undef.abfd->flags & DYNAMIC) == 0))
h->root.u.undef.abfd = abfd;
if (h->root.type == bfd_link_hash_new)
{
h->flags |= XCOFF_DEF_DYNAMIC;
h->root.type = bfd_link_hash_undefined;
h->root.u.undef.abfd = abfd;
/* We do not want to add this to the undefined symbol list. */
}
/* If the symbol is undefined, and the BFD it was found in
is not a dynamic object, change the BFD to this dynamic
object, so that we can get the correct import file ID. */
if ((h->root.type == bfd_link_hash_undefined
|| h->root.type == bfd_link_hash_undefweak)
&& (h->root.u.undef.abfd == NULL
|| (h->root.u.undef.abfd->flags & DYNAMIC) == 0))
h->root.u.undef.abfd = abfd;
if (h->smclas == XMC_UA
|| h->root.type == bfd_link_hash_undefined
|| h->root.type == bfd_link_hash_undefweak)
h->smclas = ldsym.l_smclas;
if (h->smclas == XMC_UA
|| h->root.type == bfd_link_hash_undefined
|| h->root.type == bfd_link_hash_undefweak)
h->smclas = ldsym.l_smclas;
/* Unless this is an XMC_XO symbol, we don't bother to actually
define it, since we don't have a section to put it in anyhow.
Instead, the relocation routines handle the DEF_DYNAMIC flag
correctly. */
if (h->smclas == XMC_XO
&& (h->root.type == bfd_link_hash_undefined
|| h->root.type == bfd_link_hash_undefweak))
{
/* This symbol has an absolute value. */
h->root.type = bfd_link_hash_defined;
h->root.u.def.section = bfd_abs_section_ptr;
h->root.u.def.value = ldsym.l_value;
}
}
@ -2287,7 +2317,9 @@ bfd_xcoff_import_symbol (output_bfd, info, harg, val, imppath, impfile,
if (val != (bfd_vma) -1)
{
if (h->root.type == bfd_link_hash_defined)
if (h->root.type == bfd_link_hash_defined
&& (! bfd_is_abs_section (h->root.u.def.section)
|| h->root.u.def.value != val))
{
if (! ((*info->callbacks->multiple_definition)
(info, h->root.root.string, h->root.u.def.section->owner,