/* ELF linking support for BFD.
- Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
+ Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
Free Software Foundation, Inc.
-This file is part of BFD, the Binary File Descriptor library.
+ This file is part of BFD, the Binary File Descriptor library.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "bfd.h"
#include "sysdep.h"
#define ARCH_SIZE 0
#include "elf-bfd.h"
#include "safe-ctype.h"
+#include "libiberty.h"
bfd_boolean
_bfd_elf_create_got_section (bfd *abfd, struct bfd_link_info *info)
return FALSE;
}
- flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
- | SEC_LINKER_CREATED);
+ flags = bed->dynamic_sec_flags;
s = bfd_make_section (abfd, ".got");
if (s == NULL
bed->got_symbol_offset, NULL, FALSE, bed->collect, &bh)))
return FALSE;
h = (struct elf_link_hash_entry *) bh;
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
+ h->def_regular = 1;
h->type = STT_OBJECT;
+ h->other = STV_HIDDEN;
if (! info->executable
- && ! _bfd_elf_link_record_dynamic_symbol (info, h))
+ && ! bfd_elf_link_record_dynamic_symbol (info, h))
return FALSE;
elf_hash_table (info)->hgot = h;
}
/* The first bit of the global offset table is the header. */
- s->_raw_size += bed->got_header_size + bed->got_symbol_offset;
+ s->size += bed->got_header_size + bed->got_symbol_offset;
return TRUE;
}
\f
+/* Create a strtab to hold the dynamic symbol names. */
+static bfd_boolean
+_bfd_elf_link_create_dynstrtab (bfd *abfd, struct bfd_link_info *info)
+{
+ struct elf_link_hash_table *hash_table;
+
+ hash_table = elf_hash_table (info);
+ if (hash_table->dynobj == NULL)
+ hash_table->dynobj = abfd;
+
+ if (hash_table->dynstr == NULL)
+ {
+ hash_table->dynstr = _bfd_elf_strtab_init ();
+ if (hash_table->dynstr == NULL)
+ return FALSE;
+ }
+ return TRUE;
+}
+
/* Create some sections which will be filled in with dynamic linking
information. ABFD is an input file which requires dynamic sections
to be created. The dynamic sections take up virtual memory space
if (elf_hash_table (info)->dynamic_sections_created)
return TRUE;
- /* Make sure that all dynamic sections use the same input BFD. */
- if (elf_hash_table (info)->dynobj == NULL)
- elf_hash_table (info)->dynobj = abfd;
- else
- abfd = elf_hash_table (info)->dynobj;
+ if (!_bfd_elf_link_create_dynstrtab (abfd, info))
+ return FALSE;
- /* Note that we set the SEC_IN_MEMORY flag for all of these
- sections. */
- flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY | SEC_LINKER_CREATED);
+ abfd = elf_hash_table (info)->dynobj;
+ bed = get_elf_backend_data (abfd);
+
+ flags = bed->dynamic_sec_flags;
/* A dynamically linked executable has a .interp section, but a
shared library does not. */
elf_hash_table (info)->eh_info.hdr_sec = s;
}
- bed = get_elf_backend_data (abfd);
-
/* Create sections to hold version informations. These are removed
if they are not needed. */
s = bfd_make_section (abfd, ".gnu.version_d");
|| ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY))
return FALSE;
- /* Create a strtab to hold the dynamic symbol names. */
- if (elf_hash_table (info)->dynstr == NULL)
- {
- elf_hash_table (info)->dynstr = _bfd_elf_strtab_init ();
- if (elf_hash_table (info)->dynstr == NULL)
- return FALSE;
- }
-
s = bfd_make_section (abfd, ".dynamic");
if (s == NULL
|| ! bfd_set_section_flags (abfd, s, flags)
return FALSE;
/* The special symbol _DYNAMIC is always set to the start of the
- .dynamic section. This call occurs before we have processed the
- symbols for any dynamic object, so we don't have to worry about
- overriding a dynamic definition. We could set _DYNAMIC in a
- linker script, but we only want to define it if we are, in fact,
- creating a .dynamic section. We don't want to define it if there
- is no .dynamic section, since on some ELF platforms the start up
- code examines it to decide how to initialize the process. */
- bh = NULL;
+ .dynamic section. We could set _DYNAMIC in a linker script, but we
+ only want to define it if we are, in fact, creating a .dynamic
+ section. We don't want to define it if there is no .dynamic
+ section, since on some ELF platforms the start up code examines it
+ to decide how to initialize the process. */
+ h = elf_link_hash_lookup (elf_hash_table (info), "_DYNAMIC",
+ FALSE, FALSE, FALSE);
+ if (h != NULL)
+ {
+ /* Zap symbol defined in an as-needed lib that wasn't linked.
+ This is a symptom of a larger problem: Absolute symbols
+ defined in shared libraries can't be overridden, because we
+ lose the link to the bfd which is via the symbol section. */
+ h->root.type = bfd_link_hash_new;
+ }
+ bh = &h->root;
if (! (_bfd_generic_link_add_one_symbol
(info, abfd, "_DYNAMIC", BSF_GLOBAL, s, 0, NULL, FALSE,
get_elf_backend_data (abfd)->collect, &bh)))
return FALSE;
h = (struct elf_link_hash_entry *) bh;
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
+ h->def_regular = 1;
h->type = STT_OBJECT;
if (! info->executable
- && ! _bfd_elf_link_record_dynamic_symbol (info, h))
+ && ! bfd_elf_link_record_dynamic_symbol (info, h))
return FALSE;
s = bfd_make_section (abfd, ".hash");
/* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
.rel[a].bss sections. */
-
- flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
- | SEC_LINKER_CREATED);
+ flags = bed->dynamic_sec_flags;
pltflags = flags;
- pltflags |= SEC_CODE;
if (bed->plt_not_loaded)
+ /* We do not clear SEC_ALLOC here because we still want the OS to
+ allocate space for the section; it's just that there's nothing
+ to read in from the object file. */
pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS);
+ else
+ pltflags |= SEC_ALLOC | SEC_CODE | SEC_LOAD;
if (bed->plt_readonly)
pltflags |= SEC_READONLY;
FALSE, get_elf_backend_data (abfd)->collect, &bh)))
return FALSE;
h = (struct elf_link_hash_entry *) bh;
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
+ h->def_regular = 1;
h->type = STT_OBJECT;
if (! info->executable
- && ! _bfd_elf_link_record_dynamic_symbol (info, h))
+ && ! bfd_elf_link_record_dynamic_symbol (info, h))
return FALSE;
}
return FALSE;
/* The .rel[a].bss section holds copy relocs. This section is not
- normally needed. We need to create it here, though, so that the
- linker will map it to an output section. We can't just create it
- only if we need it, because we will not know whether we need it
- until we have seen all the input files, and the first time the
- main linker code calls BFD after examining all the input files
- (size_dynamic_sections) the input sections have already been
- mapped to the output sections. If the section turns out not to
- be needed, we can discard it later. We will never need this
- section when generating a shared object, since they do not use
- copy relocs. */
+ normally needed. We need to create it here, though, so that the
+ linker will map it to an output section. We can't just create it
+ only if we need it, because we will not know whether we need it
+ until we have seen all the input files, and the first time the
+ main linker code calls BFD after examining all the input files
+ (size_dynamic_sections) the input sections have already been
+ mapped to the output sections. If the section turns out not to
+ be needed, we can discard it later. We will never need this
+ section when generating a shared object, since they do not use
+ copy relocs. */
if (! info->shared)
{
s = bfd_make_section (abfd,
one. */
bfd_boolean
-_bfd_elf_link_record_dynamic_symbol (struct bfd_link_info *info,
- struct elf_link_hash_entry *h)
+bfd_elf_link_record_dynamic_symbol (struct bfd_link_info *info,
+ struct elf_link_hash_entry *h)
{
if (h->dynindx == -1)
{
if (h->root.type != bfd_link_hash_undefined
&& h->root.type != bfd_link_hash_undefweak)
{
- h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL;
- return TRUE;
+ h->forced_local = 1;
+ if (!elf_hash_table (info)->is_relocatable_executable)
+ return TRUE;
}
default:
bfd_boolean provide)
{
struct elf_link_hash_entry *h;
+ struct elf_link_hash_table *htab;
if (!is_elf_hash_table (info->hash))
return TRUE;
- h = elf_link_hash_lookup (elf_hash_table (info), name, TRUE, TRUE, FALSE);
+ htab = elf_hash_table (info);
+ h = elf_link_hash_lookup (htab, name, !provide, TRUE, FALSE);
if (h == NULL)
- return FALSE;
+ return provide;
/* Since we're defining the symbol, don't let it seem to have not
been defined. record_dynamic_symbol and size_dynamic_sections
may depend on this. */
if (h->root.type == bfd_link_hash_undefweak
|| h->root.type == bfd_link_hash_undefined)
- h->root.type = bfd_link_hash_new;
+ {
+ h->root.type = bfd_link_hash_new;
+ if (h->root.u.undef.next != NULL || htab->root.undefs_tail == &h->root)
+ bfd_link_repair_undef_list (&htab->root);
+ }
if (h->root.type == bfd_link_hash_new)
- h->elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
+ h->non_elf = 0;
/* If this symbol is being provided by the linker script, and it is
currently defined by a dynamic object, but not by a regular
object, then mark it as undefined so that the generic linker will
force the correct value. */
if (provide
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
+ && h->def_dynamic
+ && !h->def_regular)
h->root.type = bfd_link_hash_undefined;
/* If this symbol is not being provided by the linker script, and it is
then clear out any version information because the symbol will not be
associated with the dynamic object any more. */
if (!provide
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
+ && h->def_dynamic
+ && !h->def_regular)
h->verinfo.verdef = NULL;
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
+ h->def_regular = 1;
- if (((h->elf_link_hash_flags & (ELF_LINK_HASH_DEF_DYNAMIC
- | ELF_LINK_HASH_REF_DYNAMIC)) != 0
- || info->shared)
+ /* STV_HIDDEN and STV_INTERNAL symbols must be STB_LOCAL in shared objects
+ and executables. */
+ if (!info->relocatable
+ && h->dynindx != -1
+ && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
+ || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
+ h->forced_local = 1;
+
+ if ((h->def_dynamic
+ || h->ref_dynamic
+ || info->shared
+ || (info->executable && elf_hash_table (info)->is_relocatable_executable))
&& h->dynindx == -1)
{
- if (! _bfd_elf_link_record_dynamic_symbol (info, h))
+ if (! bfd_elf_link_record_dynamic_symbol (info, h))
return FALSE;
/* If this is a weak defined symbol, and we know a corresponding
real symbol from the same dynamic object, make sure the real
symbol is also made into a dynamic symbol. */
- if (h->weakdef != NULL
- && h->weakdef->dynindx == -1)
+ if (h->u.weakdef != NULL
+ && h->u.weakdef->dynindx == -1)
{
- if (! _bfd_elf_link_record_dynamic_symbol (info, h->weakdef))
+ if (! bfd_elf_link_record_dynamic_symbol (info, h->u.weakdef))
return FALSE;
}
}
in a discarded section, eg. a discarded link-once section symbol. */
int
-elf_link_record_local_dynamic_symbol (struct bfd_link_info *info,
- bfd *input_bfd,
- long input_indx)
+bfd_elf_link_record_local_dynamic_symbol (struct bfd_link_info *info,
+ bfd *input_bfd,
+ long input_indx)
{
bfd_size_type amt;
struct elf_link_local_dynamic_entry *entry;
if (h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
+ if (h->forced_local)
+ return TRUE;
+
+ if (h->dynindx != -1)
+ h->dynindx = ++(*count);
+
+ return TRUE;
+}
+
+
+/* Like elf_link_renumber_hash_table_dynsyms, but just number symbols with
+ STB_LOCAL binding. */
+
+static bfd_boolean
+elf_link_renumber_local_hash_table_dynsyms (struct elf_link_hash_entry *h,
+ void *data)
+{
+ size_t *count = data;
+
+ if (h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+ if (!h->forced_local)
+ return TRUE;
+
if (h->dynindx != -1)
h->dynindx = ++(*count);
return TRUE;
}
+/* Return true if the dynamic symbol for a given section should be
+ omitted when creating a shared library. */
+bfd_boolean
+_bfd_elf_link_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info,
+ asection *p)
+{
+ switch (elf_section_data (p)->this_hdr.sh_type)
+ {
+ case SHT_PROGBITS:
+ case SHT_NOBITS:
+ /* If sh_type is yet undecided, assume it could be
+ SHT_PROGBITS/SHT_NOBITS. */
+ case SHT_NULL:
+ if (strcmp (p->name, ".got") == 0
+ || strcmp (p->name, ".got.plt") == 0
+ || strcmp (p->name, ".plt") == 0)
+ {
+ asection *ip;
+ bfd *dynobj = elf_hash_table (info)->dynobj;
+
+ if (dynobj != NULL
+ && (ip = bfd_get_section_by_name (dynobj, p->name)) != NULL
+ && (ip->flags & SEC_LINKER_CREATED)
+ && ip->output_section == p)
+ return TRUE;
+ }
+ return FALSE;
+
+ /* There shouldn't be section relative relocations
+ against any other section. */
+ default:
+ return TRUE;
+ }
+}
+
/* Assign dynsym indices. In a shared library we generate a section
- symbol for each output section, which come first. Next come all of
- the back-end allocated local dynamic syms, followed by the rest of
- the global symbols. */
+ symbol for each output section, which come first. Next come symbols
+ which have been forced to local binding. Then all of the back-end
+ allocated local dynamic syms, followed by the rest of the global
+ symbols. */
-unsigned long
-_bfd_elf_link_renumber_dynsyms (bfd *output_bfd, struct bfd_link_info *info)
+static unsigned long
+_bfd_elf_link_renumber_dynsyms (bfd *output_bfd,
+ struct bfd_link_info *info,
+ unsigned long *section_sym_count)
{
unsigned long dynsymcount = 0;
- if (info->shared)
+ if (info->shared || elf_hash_table (info)->is_relocatable_executable)
{
+ const struct elf_backend_data *bed = get_elf_backend_data (output_bfd);
asection *p;
for (p = output_bfd->sections; p ; p = p->next)
- if ((p->flags & SEC_EXCLUDE) == 0)
+ if ((p->flags & SEC_EXCLUDE) == 0
+ && (p->flags & SEC_ALLOC) != 0
+ && !(*bed->elf_backend_omit_section_dynsym) (output_bfd, info, p))
elf_section_data (p)->dynindx = ++dynsymcount;
}
+ *section_sym_count = dynsymcount;
+
+ elf_link_hash_traverse (elf_hash_table (info),
+ elf_link_renumber_local_hash_table_dynsyms,
+ &dynsymcount);
if (elf_hash_table (info)->dynlocal)
{
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. We set POLD_ALIGNMENT if an old common symbol in a dynamic
+ object is overridden by a regular object. */
bfd_boolean
_bfd_elf_merge_symbol (bfd *abfd,
Elf_Internal_Sym *sym,
asection **psec,
bfd_vma *pvalue,
+ unsigned int *pold_alignment,
struct elf_link_hash_entry **sym_hash,
bfd_boolean *skip,
bfd_boolean *override,
bfd_boolean *type_change_ok,
bfd_boolean *size_change_ok)
{
- asection *sec;
+ asection *sec, *oldsec;
struct elf_link_hash_entry *h;
struct elf_link_hash_entry *flip;
int bind;
if (h->root.type == bfd_link_hash_new)
{
- h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF;
+ h->non_elf = 0;
return TRUE;
}
- /* OLDBFD is a BFD associated with the existing symbol. */
+ /* OLDBFD and OLDSEC are a BFD and an ASECTION associated with the
+ existing symbol. */
switch (h->root.type)
{
default:
oldbfd = NULL;
+ oldsec = NULL;
break;
case bfd_link_hash_undefined:
case bfd_link_hash_undefweak:
oldbfd = h->root.u.undef.abfd;
+ oldsec = NULL;
break;
case bfd_link_hash_defined:
case bfd_link_hash_defweak:
oldbfd = h->root.u.def.section->owner;
+ oldsec = h->root.u.def.section;
break;
case bfd_link_hash_common:
oldbfd = h->root.u.c.p->section->owner;
+ oldsec = h->root.u.c.p->section;
break;
}
dynamic object, which we do want to handle here. */
if (abfd == oldbfd
&& ((abfd->flags & DYNAMIC) == 0
- || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
+ || !h->def_regular))
return TRUE;
/* NEWDYN and OLDDYN indicate whether the new or old symbol,
else
olddef = TRUE;
+ /* Check TLS symbol. */
+ if ((ELF_ST_TYPE (sym->st_info) == STT_TLS || h->type == STT_TLS)
+ && ELF_ST_TYPE (sym->st_info) != h->type)
+ {
+ bfd *ntbfd, *tbfd;
+ bfd_boolean ntdef, tdef;
+ asection *ntsec, *tsec;
+
+ if (h->type == STT_TLS)
+ {
+ ntbfd = abfd;
+ ntsec = sec;
+ ntdef = newdef;
+ tbfd = oldbfd;
+ tsec = oldsec;
+ tdef = olddef;
+ }
+ else
+ {
+ ntbfd = oldbfd;
+ ntsec = oldsec;
+ ntdef = olddef;
+ tbfd = abfd;
+ tsec = sec;
+ tdef = newdef;
+ }
+
+ if (tdef && ntdef)
+ (*_bfd_error_handler)
+ (_("%s: TLS definition in %B section %A mismatches non-TLS definition in %B section %A"),
+ tbfd, tsec, ntbfd, ntsec, h->root.root.string);
+ else if (!tdef && !ntdef)
+ (*_bfd_error_handler)
+ (_("%s: TLS reference in %B mismatches non-TLS reference in %B"),
+ tbfd, ntbfd, h->root.root.string);
+ else if (tdef)
+ (*_bfd_error_handler)
+ (_("%s: TLS definition in %B section %A mismatches non-TLS reference in %B"),
+ tbfd, tsec, ntbfd, h->root.root.string);
+ else
+ (*_bfd_error_handler)
+ (_("%s: TLS reference in %B mismatches non-TLS definition in %B section %A"),
+ tbfd, ntbfd, ntsec, h->root.root.string);
+
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
+
/* We need to remember if a symbol has a definition in a dynamic
object or is weak in all dynamic objects. Internal and hidden
visibility will make it unavailable to dynamic objects. */
- if (newdyn && (h->elf_link_hash_flags & ELF_LINK_DYNAMIC_DEF) == 0)
+ if (newdyn && !h->dynamic_def)
{
if (!bfd_is_und_section (sec))
- h->elf_link_hash_flags |= ELF_LINK_DYNAMIC_DEF;
+ h->dynamic_def = 1;
else
{
/* Check if this symbol is weak in all dynamic objects. If it
is the first time we see it in a dynamic object, we mark
if it is weak. Otherwise, we clear it. */
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0)
+ if (!h->ref_dynamic)
{
if (bind == STB_WEAK)
- h->elf_link_hash_flags |= ELF_LINK_DYNAMIC_WEAK;
+ h->dynamic_weak = 1;
}
else if (bind != STB_WEAK)
- h->elf_link_hash_flags &= ~ELF_LINK_DYNAMIC_WEAK;
+ h->dynamic_weak = 0;
}
}
{
*skip = TRUE;
/* Make sure this symbol is dynamic. */
- h->elf_link_hash_flags |= ELF_LINK_HASH_REF_DYNAMIC;
+ h->ref_dynamic = 1;
/* A protected symbol has external availability. Make sure it is
recorded as dynamic.
FIXME: Should we check type and size for protected symbol? */
if (ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
- return _bfd_elf_link_record_dynamic_symbol (info, h);
+ return bfd_elf_link_record_dynamic_symbol (info, h);
else
return TRUE;
}
else if (!newdyn
&& ELF_ST_VISIBILITY (sym->st_other) != STV_DEFAULT
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)
+ && h->def_dynamic)
{
/* If the new symbol with non-default visibility comes from a
relocatable file and the old definition comes from a dynamic
if ((*sym_hash)->root.type == bfd_link_hash_indirect)
h = *sym_hash;
- if ((h->root.und_next || info->hash->undefs_tail == &h->root)
+ if ((h->root.u.undef.next || info->hash->undefs_tail == &h->root)
&& bfd_is_und_section (sec))
{
/* If the new symbol is undefined and the old symbol was
also undefined before, we need to make sure
_bfd_generic_link_add_one_symbol doesn't mess
- up the linker hash table undefs list. Since the old
+ up the linker hash table undefs list. Since the old
definition came from a dynamic object, it is still on the
undefs list. */
h->root.type = bfd_link_hash_undefined;
- /* FIXME: What if the new symbol is weak undefined? */
h->root.u.undef.abfd = abfd;
}
else
h->root.u.undef.abfd = NULL;
}
- if (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)
+ if (h->def_dynamic)
{
- h->elf_link_hash_flags &= ~ELF_LINK_HASH_DEF_DYNAMIC;
- h->elf_link_hash_flags |= (ELF_LINK_HASH_REF_DYNAMIC
- | ELF_LINK_DYNAMIC_DEF);
+ h->def_dynamic = 0;
+ h->ref_dynamic = 1;
+ h->dynamic_def = 1;
}
/* FIXME: Should we check type and size for protected symbol? */
h->size = 0;
oldweak = (h->root.type == bfd_link_hash_defweak
|| h->root.type == bfd_link_hash_undefweak);
- /* If a new weak symbol comes from a regular file and the old symbol
- comes from a dynamic library, we treat the new one as strong.
- Similarly, an old weak symbol from a regular file is treated as
- strong when the new symbol comes from a dynamic library. Further,
- an old weak symbol from a dynamic library is treated as strong if
- the new symbol is from a dynamic library. This reflects the way
- glibc's ld.so works. */
- if (!newdyn && olddyn)
+ /* If a new weak symbol definition comes from a regular file and the
+ old symbol comes from a dynamic library, we treat the new one as
+ strong. Similarly, an old weak symbol definition from a regular
+ file is treated as strong when the new symbol comes from a dynamic
+ library. Further, an old weak symbol from a dynamic library is
+ treated as strong if the new symbol is from a dynamic library.
+ This reflects the way glibc's ld.so works.
+
+ Do this before setting *type_change_ok or *size_change_ok so that
+ we warn properly when dynamic library symbols are overridden. */
+
+ if (newdef && !newdyn && olddyn)
newweak = FALSE;
- if (newdyn)
+ if (olddef && newdyn)
oldweak = FALSE;
/* It's OK to change the type if either the existing symbol or the
|| h->root.type == bfd_link_hash_undefined)
*size_change_ok = TRUE;
+ /* Skip weak definitions of symbols that are already defined. */
+ if (newdef && olddef && newweak && !oldweak)
+ {
+ *skip = TRUE;
+ return TRUE;
+ }
+
/* NEWDYNCOMMON and OLDDYNCOMMON indicate whether the new or old
symbol, respectively, appears to be a common symbol in a dynamic
object. If a symbol appears in an uninitialized section, and is
if (olddyn
&& olddef
&& h->root.type == bfd_link_hash_defined
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
+ && h->def_dynamic
&& (h->root.u.def.section->flags & SEC_ALLOC) != 0
&& (h->root.u.def.section->flags & SEC_LOAD) == 0
&& h->size > 0
symbol is a function or is weak. */
flip = NULL;
- if (! newdyn
+ if (!newdyn
&& (newdef
|| (bfd_is_com_section (sec)
&& (oldweak
|| h->type == STT_FUNC)))
&& olddyn
&& olddef
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)
+ && h->def_dynamic)
{
/* Change the hash table entry to undefined, and let
_bfd_generic_link_add_one_symbol do the right thing with the
if (h->size > *pvalue)
*pvalue = h->size;
- /* FIXME: We no longer know the alignment required by the symbol
- in the dynamic object, so we just wind up using the one from
- the regular object. */
+ /* We need to remember the alignment required by the symbol
+ in the dynamic object. */
+ BFD_ASSERT (pold_alignment);
+ *pold_alignment = h->root.u.def.section->alignment_power;
olddef = FALSE;
olddyncommon = FALSE;
h->root.u.i.link = (struct bfd_link_hash_entry *) flip;
(*bed->elf_backend_copy_indirect_symbol) (bed, flip, h);
flip->root.u.undef.abfd = h->root.u.undef.abfd;
- if (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)
+ if (h->def_dynamic)
{
- h->elf_link_hash_flags &= ~ELF_LINK_HASH_DEF_DYNAMIC;
- flip->elf_link_hash_flags |= ELF_LINK_HASH_REF_DYNAMIC;
+ h->def_dynamic = 0;
+ flip->ref_dynamic = 1;
}
}
size_change_ok = FALSE;
sec = *psec;
if (!_bfd_elf_merge_symbol (abfd, info, shortname, sym, &sec, value,
- &hi, &skip, &override, &type_change_ok,
- &size_change_ok))
+ NULL, &hi, &skip, &override,
+ &type_change_ok, &size_change_ok))
return FALSE;
if (skip)
h->root.type = bfd_link_hash_indirect;
h->root.u.i.link = (struct bfd_link_hash_entry *) hi;
- if (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)
+ if (h->def_dynamic)
{
- h->elf_link_hash_flags &=~ ELF_LINK_HASH_DEF_DYNAMIC;
- hi->elf_link_hash_flags |= ELF_LINK_HASH_REF_DYNAMIC;
- if (hi->elf_link_hash_flags
- & (ELF_LINK_HASH_REF_REGULAR
- | ELF_LINK_HASH_DEF_REGULAR))
+ h->def_dynamic = 0;
+ hi->ref_dynamic = 1;
+ if (hi->ref_regular
+ || hi->def_regular)
{
- if (! _bfd_elf_link_record_dynamic_symbol (info, hi))
+ if (! bfd_elf_link_record_dynamic_symbol (info, hi))
return FALSE;
}
}
if (! dynamic)
{
if (info->shared
- || ((hi->elf_link_hash_flags
- & ELF_LINK_HASH_REF_DYNAMIC) != 0))
+ || hi->ref_dynamic)
*dynsym = TRUE;
}
else
{
- if ((hi->elf_link_hash_flags
- & ELF_LINK_HASH_REF_REGULAR) != 0)
+ if (hi->ref_regular)
*dynsym = TRUE;
}
}
size_change_ok = FALSE;
sec = *psec;
if (!_bfd_elf_merge_symbol (abfd, info, shortname, sym, &sec, value,
- &hi, &skip, &override, &type_change_ok,
- &size_change_ok))
+ NULL, &hi, &skip, &override,
+ &type_change_ok, &size_change_ok))
return FALSE;
if (skip)
if (hi->root.type != bfd_link_hash_defined
&& hi->root.type != bfd_link_hash_defweak)
(*_bfd_error_handler)
- (_("%s: warning: unexpected redefinition of indirect versioned symbol `%s'"),
- bfd_archive_filename (abfd), shortname);
+ (_("%B: unexpected redefinition of indirect versioned symbol `%s'"),
+ abfd, shortname);
}
else
{
if (! dynamic)
{
if (info->shared
- || ((hi->elf_link_hash_flags
- & ELF_LINK_HASH_REF_DYNAMIC) != 0))
+ || hi->ref_dynamic)
*dynsym = TRUE;
}
else
{
- if ((hi->elf_link_hash_flags
- & ELF_LINK_HASH_REF_REGULAR) != 0)
+ if (hi->ref_regular)
*dynsym = TRUE;
}
}
h = (struct elf_link_hash_entry *) h->root.u.i.link;
if (h->dynindx == -1
- && (h->elf_link_hash_flags
- & (ELF_LINK_HASH_DEF_REGULAR | ELF_LINK_HASH_REF_REGULAR)) != 0)
+ && (h->def_regular
+ || h->ref_regular))
{
struct bfd_elf_version_tree *t;
struct bfd_elf_version_expr *d;
if (!eif->verdefs)
{
doit:
- if (! _bfd_elf_link_record_dynamic_symbol (eif->info, h))
+ if (! bfd_elf_link_record_dynamic_symbol (eif->info, h))
{
eif->failed = TRUE;
return FALSE;
/* We only care about symbols defined in shared objects with version
information. */
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
- || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
+ if (!h->def_dynamic
+ || h->def_regular
|| h->dynindx == -1
|| h->verinfo.verdef == NULL)
return TRUE;
/* We only need version numbers for symbols defined in regular
objects. */
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
+ if (!h->def_regular)
return TRUE;
bed = get_elf_backend_data (sinfo->output_bfd);
if (*p == '\0')
{
if (hidden)
- h->elf_link_hash_flags |= ELF_LINK_HIDDEN;
+ h->hidden = 1;
return TRUE;
}
/* We could not find the version for a symbol when
generating a shared archive. Return an error. */
(*_bfd_error_handler)
- (_("%s: undefined versioned symbol name %s"),
- bfd_get_filename (sinfo->output_bfd), h->root.root.string);
+ (_("%B: undefined versioned symbol name %s"),
+ sinfo->output_bfd, h->root.root.string);
bfd_set_error (bfd_error_bad_value);
sinfo->failed = TRUE;
return FALSE;
}
if (hidden)
- h->elf_link_hash_flags |= ELF_LINK_HIDDEN;
+ h->hidden = 1;
}
/* If we don't have a version for this symbol, see if we can find
if ((size_t) r_symndx >= nsyms)
{
(*_bfd_error_handler)
- (_("%s: bad reloc symbol index (0x%lx >= 0x%lx) for offset 0x%lx in section `%s'"),
- bfd_archive_filename (abfd), (unsigned long) r_symndx,
- (unsigned long) nsyms, irela->r_offset, sec->name);
+ (_("%B: bad reloc symbol index (0x%lx >= 0x%lx)"
+ " for offset 0x%lx in section `%A'"),
+ abfd, sec,
+ (unsigned long) r_symndx, (unsigned long) nsyms, irela->r_offset);
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
else
{
(*_bfd_error_handler)
- (_("%s: relocation size mismatch in %s section %s"),
- bfd_get_filename (output_bfd),
- bfd_archive_filename (input_section->owner),
- input_section->name);
+ (_("%B: relocation size mismatch in %B section %A"),
+ output_bfd, input_section->owner, input_section);
bfd_set_error (bfd_error_wrong_object_format);
return FALSE;
}
DEF_REGULAR and REF_REGULAR correctly. This is the only way to
permit a non-ELF file to correctly refer to a symbol defined in
an ELF dynamic object. */
- if ((h->elf_link_hash_flags & ELF_LINK_NON_ELF) != 0)
+ if (h->non_elf)
{
while (h->root.type == bfd_link_hash_indirect)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
if (h->root.type != bfd_link_hash_defined
&& h->root.type != bfd_link_hash_defweak)
- h->elf_link_hash_flags |= (ELF_LINK_HASH_REF_REGULAR
- | ELF_LINK_HASH_REF_REGULAR_NONWEAK);
+ {
+ h->ref_regular = 1;
+ h->ref_regular_nonweak = 1;
+ }
else
{
if (h->root.u.def.section->owner != NULL
&& (bfd_get_flavour (h->root.u.def.section->owner)
== bfd_target_elf_flavour))
- h->elf_link_hash_flags |= (ELF_LINK_HASH_REF_REGULAR
- | ELF_LINK_HASH_REF_REGULAR_NONWEAK);
+ {
+ h->ref_regular = 1;
+ h->ref_regular_nonweak = 1;
+ }
else
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
+ h->def_regular = 1;
}
if (h->dynindx == -1
- && ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
- || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0))
+ && (h->def_dynamic
+ || h->ref_dynamic))
{
- if (! _bfd_elf_link_record_dynamic_symbol (eif->info, h))
+ if (! bfd_elf_link_record_dynamic_symbol (eif->info, h))
{
eif->failed = TRUE;
return FALSE;
}
else
{
- /* Unfortunately, ELF_LINK_NON_ELF is only correct if the symbol
+ /* Unfortunately, NON_ELF is only correct if the symbol
was first seen in a non-ELF file. Fortunately, if the symbol
was first seen in an ELF file, we're probably OK unless the
symbol was defined in a non-ELF file. Catch that case here.
a dynamic object, and then later in a non-ELF regular object. */
if ((h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
+ && !h->def_regular
&& (h->root.u.def.section->owner != NULL
? (bfd_get_flavour (h->root.u.def.section->owner)
!= bfd_target_elf_flavour)
: (bfd_is_abs_section (h->root.u.def.section)
- && (h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_DYNAMIC) == 0)))
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
+ && !h->def_dynamic)))
+ h->def_regular = 1;
}
/* If this is a final link, and the symbol was defined as a common
symbol in a regular object file, and there was no definition in
any dynamic object, then the linker will have allocated space for
- the symbol in a common section but the ELF_LINK_HASH_DEF_REGULAR
+ the symbol in a common section but the DEF_REGULAR
flag will not have been set. */
if (h->root.type == bfd_link_hash_defined
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) != 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
+ && !h->def_regular
+ && h->ref_regular
+ && !h->def_dynamic
&& (h->root.u.def.section->owner->flags & DYNAMIC) == 0)
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
+ h->def_regular = 1;
/* If -Bsymbolic was used (which means to bind references to global
symbols to the definition within the shared object), and this
need a PLT entry. Likewise, if the symbol has non-default
visibility. If the symbol has hidden or internal visibility, we
will force it local. */
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0
+ if (h->needs_plt
&& eif->info->shared
&& is_elf_hash_table (eif->info->hash)
&& (eif->info->symbolic
|| ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0)
+ && h->def_regular)
{
const struct elf_backend_data *bed;
bfd_boolean force_local;
/* If this is a weak defined symbol in a dynamic object, and we know
the real definition in the dynamic object, copy interesting flags
over to the real definition. */
- if (h->weakdef != NULL)
+ if (h->u.weakdef != NULL)
{
struct elf_link_hash_entry *weakdef;
- weakdef = h->weakdef;
+ weakdef = h->u.weakdef;
if (h->root.type == bfd_link_hash_indirect)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|| h->root.type == bfd_link_hash_defweak);
BFD_ASSERT (weakdef->root.type == bfd_link_hash_defined
|| weakdef->root.type == bfd_link_hash_defweak);
- BFD_ASSERT (weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC);
+ BFD_ASSERT (weakdef->def_dynamic);
/* If the real definition is defined by a regular object file,
don't do anything special. See the longer description in
_bfd_elf_adjust_dynamic_symbol, below. */
- if ((weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0)
- h->weakdef = NULL;
+ if (weakdef->def_regular)
+ h->u.weakdef = NULL;
else
{
const struct elf_backend_data *bed;
to the dynamic symbol table. FIXME: Do we normally need to worry
about symbols which are defined by one dynamic object and
referenced by another one? */
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) == 0
- && ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
- || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
- || ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0
- && (h->weakdef == NULL || h->weakdef->dynindx == -1))))
+ if (!h->needs_plt
+ && (h->def_regular
+ || !h->def_dynamic
+ || (!h->ref_regular
+ && (h->u.weakdef == NULL || h->u.weakdef->dynindx == -1))))
{
h->plt = elf_hash_table (eif->info)->init_offset;
return TRUE;
/* If we've already adjusted this symbol, don't do it again. This
can happen via a recursive call. */
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
+ if (h->dynamic_adjusted)
return TRUE;
/* Don't look at this symbol again. Note that we must set this
after checking the above conditions, because we may look at a
symbol once, decide not to do anything, and then get called
recursively later after REF_REGULAR is set below. */
- h->elf_link_hash_flags |= ELF_LINK_HASH_DYNAMIC_ADJUSTED;
+ h->dynamic_adjusted = 1;
/* If this is a weak definition, and we know a real definition, and
the real symbol is not itself defined by a regular object file,
wind up at different memory locations. The tzset call will set
_timezone, leaving timezone unchanged. */
- if (h->weakdef != NULL)
+ if (h->u.weakdef != NULL)
{
/* If we get to this point, we know there is an implicit
reference by a regular object file via the weak symbol H.
FIXME: Is this really true? What if the traversal finds
- H->WEAKDEF before it finds H? */
- h->weakdef->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR;
+ H->U.WEAKDEF before it finds H? */
+ h->u.weakdef->ref_regular = 1;
- if (! _bfd_elf_adjust_dynamic_symbol (h->weakdef, eif))
+ if (! _bfd_elf_adjust_dynamic_symbol (h->u.weakdef, eif))
return FALSE;
}
code, and the assembly code fails to set the symbol type. */
if (h->size == 0
&& h->type == STT_NOTYPE
- && (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) == 0)
+ && !h->needs_plt)
(*_bfd_error_handler)
(_("warning: type and size of dynamic symbol `%s' are not defined"),
h->root.root.string);
_bfd_merged_section_offset (output_bfd,
&h->root.u.def.section,
elf_section_data (sec)->sec_info,
- h->root.u.def.value, 0);
+ h->root.u.def.value);
}
return TRUE;
/* If it was forced local, then clearly it's not dynamic. */
if (h->dynindx == -1)
return FALSE;
- if (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)
+ if (h->forced_local)
return FALSE;
/* Identify the cases where name binding rules say that a
/* Proper resolution for function pointer equality may require
that these symbols perhaps be resolved dynamically, even though
we should be resolving them to the current module. */
- if (!ignore_protected)
+ if (!ignore_protected || h->type != STT_FUNC)
binding_stays_local_p = TRUE;
break;
}
/* If it isn't defined locally, then clearly it's dynamic. */
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
+ if (!h->def_regular)
return TRUE;
/* Otherwise, the symbol is dynamic if binding rules don't tell
if (h == NULL)
return TRUE;
+ /* Common symbols that become definitions don't get the DEF_REGULAR
+ flag set, so test it first, and don't bail out. */
+ if (ELF_COMMON_DEF_P (h))
+ /* Do nothing. */;
/* If we don't have a definition in a regular file, then we can't
resolve locally. The sym is either undefined or dynamic. */
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
+ else if (!h->def_regular)
return FALSE;
/* Forced local symbols resolve locally. */
- if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)
+ if (h->forced_local)
return TRUE;
/* As do non-dynamic symbols. */
if (ELF_ST_VISIBILITY (h->other) != STV_PROTECTED)
return TRUE;
+ /* STV_PROTECTED non-function symbols are local. */
+ if (h->type != STT_FUNC)
+ return TRUE;
+
/* Function pointer equality tests may require that STV_PROTECTED
symbols be treated as dynamic symbols, even when we know that the
dynamic linker will resolve them locally. */
if (! is_elf_hash_table (hash_table))
return FALSE;
+ if (info->warn_shared_textrel && info->shared && tag == DT_TEXTREL)
+ _bfd_error_handler
+ (_("warning: creating a DT_TEXTREL in a shared object."));
+
bed = get_elf_backend_data (hash_table->dynobj);
s = bfd_get_section_by_name (hash_table->dynobj, ".dynamic");
BFD_ASSERT (s != NULL);
- newsize = s->_raw_size + bed->s->sizeof_dyn;
+ newsize = s->size + bed->s->sizeof_dyn;
newcontents = bfd_realloc (s->contents, newsize);
if (newcontents == NULL)
return FALSE;
dyn.d_tag = tag;
dyn.d_un.d_val = val;
- bed->s->swap_dyn_out (hash_table->dynobj, &dyn, newcontents + s->_raw_size);
+ bed->s->swap_dyn_out (hash_table->dynobj, &dyn, newcontents + s->size);
- s->_raw_size = newsize;
+ s->size = newsize;
s->contents = newcontents;
return TRUE;
1 if a DT_NEEDED tag already exists, and 0 on success. */
static int
-elf_add_dt_needed_tag (struct bfd_link_info *info,
+elf_add_dt_needed_tag (bfd *abfd,
+ struct bfd_link_info *info,
const char *soname,
bfd_boolean do_it)
{
bfd_size_type oldsize;
bfd_size_type strindex;
+ if (!_bfd_elf_link_create_dynstrtab (abfd, info))
+ return -1;
+
hash_table = elf_hash_table (info);
oldsize = _bfd_elf_strtab_size (hash_table->dynstr);
strindex = _bfd_elf_strtab_add (hash_table->dynstr, soname, FALSE);
bed = get_elf_backend_data (hash_table->dynobj);
sdyn = bfd_get_section_by_name (hash_table->dynobj, ".dynamic");
- BFD_ASSERT (sdyn != NULL);
-
- for (extdyn = sdyn->contents;
- extdyn < sdyn->contents + sdyn->_raw_size;
- extdyn += bed->s->sizeof_dyn)
- {
- Elf_Internal_Dyn dyn;
+ if (sdyn != NULL)
+ for (extdyn = sdyn->contents;
+ extdyn < sdyn->contents + sdyn->size;
+ extdyn += bed->s->sizeof_dyn)
+ {
+ Elf_Internal_Dyn dyn;
- bed->s->swap_dyn_in (hash_table->dynobj, extdyn, &dyn);
- if (dyn.d_tag == DT_NEEDED
- && dyn.d_un.d_val == strindex)
- {
- _bfd_elf_strtab_delref (hash_table->dynstr, strindex);
- return 1;
- }
- }
+ bed->s->swap_dyn_in (hash_table->dynobj, extdyn, &dyn);
+ if (dyn.d_tag == DT_NEEDED
+ && dyn.d_un.d_val == strindex)
+ {
+ _bfd_elf_strtab_delref (hash_table->dynstr, strindex);
+ return 1;
+ }
+ }
}
if (do_it)
{
+ if (!_bfd_elf_link_create_dynamic_sections (hash_table->dynobj, info))
+ return -1;
+
if (!_bfd_elf_add_dynamic_entry (info, DT_NEEDED, strindex))
return -1;
}
return 0;
}
+/* Called via elf_link_hash_traverse, elf_smash_syms sets all symbols
+ belonging to NOT_NEEDED to bfd_link_hash_new. We know there are no
+ references from regular objects to these symbols.
+
+ ??? Should we do something about references from other dynamic
+ obects? If not, we potentially lose some warnings about undefined
+ symbols. But how can we recover the initial undefined / undefweak
+ state? */
+
+struct elf_smash_syms_data
+{
+ bfd *not_needed;
+ struct elf_link_hash_table *htab;
+ bfd_boolean twiddled;
+};
+
+static bfd_boolean
+elf_smash_syms (struct elf_link_hash_entry *h, void *data)
+{
+ struct elf_smash_syms_data *inf = (struct elf_smash_syms_data *) data;
+ struct bfd_link_hash_entry *bh;
+
+ switch (h->root.type)
+ {
+ default:
+ case bfd_link_hash_new:
+ return TRUE;
+
+ case bfd_link_hash_undefined:
+ if (h->root.u.undef.abfd != inf->not_needed)
+ return TRUE;
+ if (h->root.u.undef.weak != NULL
+ && h->root.u.undef.weak != inf->not_needed)
+ {
+ /* Symbol was undefweak in u.undef.weak bfd, and has become
+ undefined in as-needed lib. Restore weak. */
+ h->root.type = bfd_link_hash_undefweak;
+ h->root.u.undef.abfd = h->root.u.undef.weak;
+ if (h->root.u.undef.next != NULL
+ || inf->htab->root.undefs_tail == &h->root)
+ inf->twiddled = TRUE;
+ return TRUE;
+ }
+ break;
+
+ case bfd_link_hash_undefweak:
+ if (h->root.u.undef.abfd != inf->not_needed)
+ return TRUE;
+ break;
+
+ case bfd_link_hash_defined:
+ case bfd_link_hash_defweak:
+ if (h->root.u.def.section->owner != inf->not_needed)
+ return TRUE;
+ break;
+
+ case bfd_link_hash_common:
+ if (h->root.u.c.p->section->owner != inf->not_needed)
+ return TRUE;
+ break;
+
+ case bfd_link_hash_warning:
+ case bfd_link_hash_indirect:
+ elf_smash_syms ((struct elf_link_hash_entry *) h->root.u.i.link, data);
+ if (h->root.u.i.link->type != bfd_link_hash_new)
+ return TRUE;
+ if (h->root.u.i.link->u.undef.abfd != inf->not_needed)
+ return TRUE;
+ break;
+ }
+
+ /* There is no way we can undo symbol table state from defined or
+ defweak back to undefined. */
+ if (h->ref_regular)
+ abort ();
+
+ /* Set sym back to newly created state, but keep undef.next if it is
+ being used as a list pointer. */
+ bh = h->root.u.undef.next;
+ if (bh == &h->root)
+ bh = NULL;
+ if (bh != NULL || inf->htab->root.undefs_tail == &h->root)
+ inf->twiddled = TRUE;
+ (*inf->htab->root.table.newfunc) (&h->root.root,
+ &inf->htab->root.table,
+ h->root.root.string);
+ h->root.u.undef.next = bh;
+ h->root.u.undef.abfd = inf->not_needed;
+ h->non_elf = 0;
+ return TRUE;
+}
+
/* Sort symbol by value and section. */
static int
elf_sort_symbol (const void *arg1, const void *arg2)
return vdiff > 0 ? 1 : -1;
else
{
- long sdiff = h1->root.u.def.section - h2->root.u.def.section;
+ long sdiff = h1->root.u.def.section->id - h2->root.u.def.section->id;
if (sdiff != 0)
return sdiff > 0 ? 1 : -1;
}
/* Update all .dynamic entries referencing .dynstr strings. */
for (extdyn = sdyn->contents;
- extdyn < sdyn->contents + sdyn->_raw_size;
+ extdyn < sdyn->contents + sdyn->size;
extdyn += bed->s->sizeof_dyn)
{
Elf_Internal_Dyn dyn;
_bfd_elf_swap_verdef_in (output_bfd, (Elf_External_Verdef *) p,
&def);
p += sizeof (Elf_External_Verdef);
+ if (def.vd_aux != sizeof (Elf_External_Verdef))
+ continue;
for (i = 0; i < def.vd_cnt; ++i)
{
_bfd_elf_swap_verdaux_in (output_bfd,
elf_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info)
{
bfd_boolean (*add_symbol_hook)
- (bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
+ (bfd *, struct bfd_link_info *, Elf_Internal_Sym *,
const char **, flagword *, asection **, bfd_vma *);
bfd_boolean (*check_relocs)
(bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *);
+ bfd_boolean (*check_directives)
+ (bfd *, struct bfd_link_info *);
bfd_boolean collect;
Elf_Internal_Shdr *hdr;
bfd_size_type symcount;
|| !is_elf_hash_table (hash_table)
|| hash_table->root.creator != abfd->xvec)
{
- bfd_set_error (bfd_error_invalid_operation);
+ if (info->relocatable)
+ bfd_set_error (bfd_error_invalid_operation);
+ else
+ bfd_set_error (bfd_error_wrong_format);
goto error_return;
}
}
{
char *msg;
bfd_size_type sz;
- bfd_size_type prefix_len;
- const char * gnu_warning_prefix = _("warning: ");
name += sizeof ".gnu.warning." - 1;
/* We don't want to issue this warning. Clobber
the section size so that the warning does not
get copied into the output file. */
- s->_raw_size = 0;
+ s->size = 0;
continue;
}
}
- sz = bfd_section_size (abfd, s);
- prefix_len = strlen (gnu_warning_prefix);
- msg = bfd_alloc (abfd, prefix_len + sz + 1);
+ sz = s->size;
+ msg = bfd_alloc (abfd, sz + 1);
if (msg == NULL)
goto error_return;
- strcpy (msg, gnu_warning_prefix);
- if (! bfd_get_section_contents (abfd, s, msg + prefix_len, 0, sz))
+ if (! bfd_get_section_contents (abfd, s, msg, 0, sz))
goto error_return;
- msg[prefix_len + sz] = '\0';
+ msg[sz] = '\0';
if (! (_bfd_generic_link_add_one_symbol
(info, abfd, name, BSF_WARNING, s, 0, msg,
{
/* Clobber the section size so that the warning does
not get copied into the output file. */
- s->_raw_size = 0;
+ s->size = 0;
+
+ /* Also set SEC_EXCLUDE, so that symbols defined in
+ the warning section don't get copied to the output. */
+ s->flags |= SEC_EXCLUDE;
}
}
}
/* If this dynamic lib was specified on the command line with
--as-needed in effect, then we don't want to add a DT_NEEDED
tag unless the lib is actually used. Similary for libs brought
- in by another lib's DT_NEEDED. */
- add_needed = elf_dyn_lib_class (abfd) == DYN_NORMAL;
+ in by another lib's DT_NEEDED. When --no-add-needed is used
+ on a dynamic lib, we don't want to add a DT_NEEDED entry for
+ any dynamic library in DT_NEEDED tags in the dynamic lib at
+ all. */
+ add_needed = (elf_dyn_lib_class (abfd)
+ & (DYN_AS_NEEDED | DYN_DT_NEEDED
+ | DYN_NO_NEEDED)) == 0;
s = bfd_get_section_by_name (abfd, ".dynamic");
if (s != NULL)
int elfsec;
unsigned long shlink;
- dynbuf = bfd_malloc (s->_raw_size);
- if (dynbuf == NULL)
- goto error_return;
-
- if (! bfd_get_section_contents (abfd, s, dynbuf, 0, s->_raw_size))
+ if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
goto error_free_dyn;
elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
shlink = elf_elfsections (abfd)[elfsec]->sh_link;
for (extdyn = dynbuf;
- extdyn < dynbuf + s->_raw_size;
+ extdyn < dynbuf + s->size;
extdyn += bed->s->sizeof_dyn)
{
Elf_Internal_Dyn dyn;
file. */
bfd_section_list_clear (abfd);
- /* If this is the first dynamic object found in the link, create
- the special sections required for dynamic linking. */
- if (! _bfd_elf_link_create_dynamic_sections (abfd, info))
- goto error_return;
-
/* Find the name to use in a DT_NEEDED entry that refers to this
object. If the object has a DT_SONAME entry, we use it.
Otherwise, if the generic linker stuck something in
will need to know it. */
elf_dt_name (abfd) = soname;
- ret = elf_add_dt_needed_tag (info, soname, add_needed);
+ ret = elf_add_dt_needed_tag (abfd, info, soname, add_needed);
if (ret < 0)
goto error_return;
if (dynamic)
{
/* Read in any version definitions. */
- if (! _bfd_elf_slurp_version_tables (abfd))
+ if (!_bfd_elf_slurp_version_tables (abfd,
+ info->default_imported_symver))
goto error_free_sym;
/* Read in the symbol versions, but don't bother to convert them
{
int bind;
bfd_vma value;
- asection *sec;
+ asection *sec, *new_sec;
flagword flags;
const char *name;
struct elf_link_hash_entry *h;
sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
if (sec == NULL)
sec = bfd_abs_section_ptr;
+ else if (sec->kept_section)
+ {
+ /* Symbols from discarded section are undefined, and have
+ default visibility. */
+ sec = bfd_und_section_ptr;
+ isym->st_shndx = SHN_UNDEF;
+ isym->st_other = STV_DEFAULT
+ | (isym->st_other & ~ ELF_ST_VISIBILITY(-1));
+ }
else if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
value -= sec->vma;
}
type_change_ok = get_elf_backend_data (abfd)->type_change_ok;
old_alignment = 0;
old_bfd = NULL;
+ new_sec = sec;
if (is_elf_hash_table (hash_table))
{
unsigned int vernum = 0;
bfd_boolean skip;
- if (ever != NULL)
+ if (ever == NULL)
+ {
+ if (info->default_imported_symver)
+ /* Use the default symbol version created earlier. */
+ iver.vs_vers = elf_tdata (abfd)->cverdefs;
+ else
+ iver.vs_vers = 0;
+ }
+ else
+ _bfd_elf_swap_versym_in (abfd, ever, &iver);
+
+ vernum = iver.vs_vers & VERSYM_VERSION;
+
+ /* If this is a hidden symbol, or if it is not version
+ 1, we append the version name to the symbol name.
+ However, we do not modify a non-hidden absolute
+ symbol, because it might be the version symbol
+ itself. FIXME: What if it isn't? */
+ if ((iver.vs_vers & VERSYM_HIDDEN) != 0
+ || (vernum > 1 && ! bfd_is_abs_section (sec)))
{
- _bfd_elf_swap_versym_in (abfd, ever, &iver);
- vernum = iver.vs_vers & VERSYM_VERSION;
-
- /* If this is a hidden symbol, or if it is not version
- 1, we append the version name to the symbol name.
- However, we do not modify a non-hidden absolute
- symbol, because it might be the version symbol
- itself. FIXME: What if it isn't? */
- if ((iver.vs_vers & VERSYM_HIDDEN) != 0
- || (vernum > 1 && ! bfd_is_abs_section (sec)))
+ const char *verstr;
+ size_t namelen, verlen, newlen;
+ char *newname, *p;
+
+ if (isym->st_shndx != SHN_UNDEF)
{
- const char *verstr;
- size_t namelen, verlen, newlen;
- char *newname, *p;
+ if (vernum > elf_tdata (abfd)->cverdefs)
+ verstr = NULL;
+ else if (vernum > 1)
+ verstr =
+ elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
+ else
+ verstr = "";
- if (isym->st_shndx != SHN_UNDEF)
+ if (verstr == NULL)
{
- if (vernum > elf_tdata (abfd)->dynverdef_hdr.sh_info)
- {
- (*_bfd_error_handler)
- (_("%s: %s: invalid version %u (max %d)"),
- bfd_archive_filename (abfd), name, vernum,
- elf_tdata (abfd)->dynverdef_hdr.sh_info);
- bfd_set_error (bfd_error_bad_value);
- goto error_free_vers;
- }
- else if (vernum > 1)
- verstr =
- elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
- else
- verstr = "";
+ (*_bfd_error_handler)
+ (_("%B: %s: invalid version %u (max %d)"),
+ abfd, name, vernum,
+ elf_tdata (abfd)->cverdefs);
+ bfd_set_error (bfd_error_bad_value);
+ goto error_free_vers;
}
- else
+ }
+ else
+ {
+ /* We cannot simply test for the number of
+ entries in the VERNEED section since the
+ numbers for the needed versions do not start
+ at 0. */
+ Elf_Internal_Verneed *t;
+
+ verstr = NULL;
+ for (t = elf_tdata (abfd)->verref;
+ t != NULL;
+ t = t->vn_nextref)
{
- /* We cannot simply test for the number of
- entries in the VERNEED section since the
- numbers for the needed versions do not start
- at 0. */
- Elf_Internal_Verneed *t;
-
- verstr = NULL;
- for (t = elf_tdata (abfd)->verref;
- t != NULL;
- t = t->vn_nextref)
- {
- Elf_Internal_Vernaux *a;
+ Elf_Internal_Vernaux *a;
- for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
+ for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
+ {
+ if (a->vna_other == vernum)
{
- if (a->vna_other == vernum)
- {
- verstr = a->vna_nodename;
- break;
- }
+ verstr = a->vna_nodename;
+ break;
}
- if (a != NULL)
- break;
- }
- if (verstr == NULL)
- {
- (*_bfd_error_handler)
- (_("%s: %s: invalid needed version %d"),
- bfd_archive_filename (abfd), name, vernum);
- bfd_set_error (bfd_error_bad_value);
- goto error_free_vers;
}
+ if (a != NULL)
+ break;
+ }
+ if (verstr == NULL)
+ {
+ (*_bfd_error_handler)
+ (_("%B: %s: invalid needed version %d"),
+ abfd, name, vernum);
+ bfd_set_error (bfd_error_bad_value);
+ goto error_free_vers;
}
+ }
- namelen = strlen (name);
- verlen = strlen (verstr);
- newlen = namelen + verlen + 2;
- if ((iver.vs_vers & VERSYM_HIDDEN) == 0
- && isym->st_shndx != SHN_UNDEF)
- ++newlen;
+ namelen = strlen (name);
+ verlen = strlen (verstr);
+ newlen = namelen + verlen + 2;
+ if ((iver.vs_vers & VERSYM_HIDDEN) == 0
+ && isym->st_shndx != SHN_UNDEF)
+ ++newlen;
- newname = bfd_alloc (abfd, newlen);
- if (newname == NULL)
- goto error_free_vers;
- memcpy (newname, name, namelen);
- p = newname + namelen;
- *p++ = ELF_VER_CHR;
- /* If this is a defined non-hidden version symbol,
- we add another @ to the name. This indicates the
- default version of the symbol. */
- if ((iver.vs_vers & VERSYM_HIDDEN) == 0
- && isym->st_shndx != SHN_UNDEF)
- *p++ = ELF_VER_CHR;
- memcpy (p, verstr, verlen + 1);
+ newname = bfd_alloc (abfd, newlen);
+ if (newname == NULL)
+ goto error_free_vers;
+ memcpy (newname, name, namelen);
+ p = newname + namelen;
+ *p++ = ELF_VER_CHR;
+ /* If this is a defined non-hidden version symbol,
+ we add another @ to the name. This indicates the
+ default version of the symbol. */
+ if ((iver.vs_vers & VERSYM_HIDDEN) == 0
+ && isym->st_shndx != SHN_UNDEF)
+ *p++ = ELF_VER_CHR;
+ memcpy (p, verstr, verlen + 1);
- name = newname;
- }
+ name = newname;
}
- if (!_bfd_elf_merge_symbol (abfd, info, name, isym, &sec, &value,
+ if (!_bfd_elf_merge_symbol (abfd, info, name, isym, &sec,
+ &value, &old_alignment,
sym_hash, &skip, &override,
&type_change_ok, &size_change_ok))
goto error_free_vers;
&& (flags & BSF_WEAK) != 0
&& ELF_ST_TYPE (isym->st_info) != STT_FUNC
&& is_elf_hash_table (hash_table)
- && h->weakdef == NULL)
+ && h->u.weakdef == NULL)
{
/* Keep a list of all weak defined non function symbols from
a dynamic object, using the weakdef field. Later in this
dynamic object, and we will be using that previous
definition anyhow. */
- h->weakdef = weaks;
+ h->u.weakdef = weaks;
weaks = h;
new_weakdef = TRUE;
}
/* Set the alignment of a common symbol. */
- if (isym->st_shndx == SHN_COMMON
+ if ((isym->st_shndx == SHN_COMMON
+ || bfd_is_com_section (sec))
&& h->root.type == bfd_link_hash_common)
{
unsigned int align;
- align = bfd_log2 (isym->st_value);
+ if (isym->st_shndx == SHN_COMMON)
+ align = bfd_log2 (isym->st_value);
+ else
+ {
+ /* The new symbol is a common symbol in a shared object.
+ We need to get the alignment from the section. */
+ align = new_sec->alignment_power;
+ }
if (align > old_alignment
/* Permit an alignment power of zero if an alignment of one
is specified and no other alignments have been specified. */
if (is_elf_hash_table (hash_table))
{
- int old_flags;
bfd_boolean dynsym;
- int new_flag;
/* Check the alignment when a common symbol is involved. This
can change when a common symbol is overridden by a normal
if (normal_align < common_align)
(*_bfd_error_handler)
- (_("Warning: alignment %u of symbol `%s' in %s is smaller than %u in %s"),
- 1 << normal_align,
- name,
- bfd_archive_filename (normal_bfd),
- 1 << common_align,
- bfd_archive_filename (common_bfd));
+ (_("Warning: alignment %u of symbol `%s' in %B"
+ " is smaller than %u in %B"),
+ normal_bfd, common_bfd,
+ 1 << normal_align, name, 1 << common_align);
}
/* Remember the symbol size and type. */
{
if (h->size != 0 && h->size != isym->st_size && ! size_change_ok)
(*_bfd_error_handler)
- (_("Warning: size of symbol `%s' changed from %lu in %s to %lu in %s"),
+ (_("Warning: size of symbol `%s' changed"
+ " from %lu in %B to %lu in %B"),
+ old_bfd, abfd,
name, (unsigned long) h->size,
- bfd_archive_filename (old_bfd),
- (unsigned long) isym->st_size,
- bfd_archive_filename (abfd));
+ (unsigned long) isym->st_size);
h->size = isym->st_size;
}
&& h->type != ELF_ST_TYPE (isym->st_info)
&& ! type_change_ok)
(*_bfd_error_handler)
- (_("Warning: type of symbol `%s' changed from %d to %d in %s"),
- name, h->type, ELF_ST_TYPE (isym->st_info),
- bfd_archive_filename (abfd));
+ (_("Warning: type of symbol `%s' changed"
+ " from %d to %d in %B"),
+ abfd, name, h->type, ELF_ST_TYPE (isym->st_info));
h->type = ELF_ST_TYPE (isym->st_info);
}
(*bed->elf_backend_merge_symbol_attribute) (h, isym, definition,
dynamic);
+ /* If this symbol has default visibility and the user has requested
+ we not re-export it, then mark it as hidden. */
+ if (definition && !dynamic
+ && (abfd->no_export
+ || (abfd->my_archive && abfd->my_archive->no_export))
+ && ELF_ST_VISIBILITY (isym->st_other) != STV_INTERNAL)
+ isym->st_other = STV_HIDDEN | (isym->st_other & ~ ELF_ST_VISIBILITY (-1));
+
if (isym->st_other != 0 && !dynamic)
{
unsigned char hvis, symvis, other, nvis;
the number of dynamic symbols we find. A dynamic symbol
is one which is referenced or defined by both a regular
object and a shared object. */
- old_flags = h->elf_link_hash_flags;
dynsym = FALSE;
if (! dynamic)
{
if (! definition)
{
- new_flag = ELF_LINK_HASH_REF_REGULAR;
+ h->ref_regular = 1;
if (bind != STB_WEAK)
- new_flag |= ELF_LINK_HASH_REF_REGULAR_NONWEAK;
+ h->ref_regular_nonweak = 1;
}
else
- new_flag = ELF_LINK_HASH_DEF_REGULAR;
+ h->def_regular = 1;
if (! info->executable
- || (old_flags & (ELF_LINK_HASH_DEF_DYNAMIC
- | ELF_LINK_HASH_REF_DYNAMIC)) != 0)
+ || h->def_dynamic
+ || h->ref_dynamic)
dynsym = TRUE;
}
else
{
if (! definition)
- new_flag = ELF_LINK_HASH_REF_DYNAMIC;
+ h->ref_dynamic = 1;
else
- new_flag = ELF_LINK_HASH_DEF_DYNAMIC;
- if ((old_flags & (ELF_LINK_HASH_DEF_REGULAR
- | ELF_LINK_HASH_REF_REGULAR)) != 0
- || (h->weakdef != NULL
+ h->def_dynamic = 1;
+ if (h->def_regular
+ || h->ref_regular
+ || (h->u.weakdef != NULL
&& ! new_weakdef
- && h->weakdef->dynindx != -1))
+ && h->u.weakdef->dynindx != -1))
dynsym = TRUE;
}
- h->elf_link_hash_flags |= new_flag;
-
/* Check to see if we need to add an indirect symbol for
the default name. */
if (definition || h->root.type == bfd_link_hash_common)
if (dynsym && h->dynindx == -1)
{
- if (! _bfd_elf_link_record_dynamic_symbol (info, h))
+ if (! bfd_elf_link_record_dynamic_symbol (info, h))
goto error_free_vers;
- if (h->weakdef != NULL
+ if (h->u.weakdef != NULL
&& ! new_weakdef
- && h->weakdef->dynindx == -1)
+ && h->u.weakdef->dynindx == -1)
{
- if (! _bfd_elf_link_record_dynamic_symbol (info, h->weakdef))
+ if (! bfd_elf_link_record_dynamic_symbol (info, h->u.weakdef))
goto error_free_vers;
}
}
if (!add_needed
&& definition
&& dynsym
- && (h->elf_link_hash_flags
- & ELF_LINK_HASH_REF_REGULAR) != 0)
+ && h->ref_regular)
{
int ret;
const char *soname = elf_dt_name (abfd);
/* A symbol from a library loaded via DT_NEEDED of some
other library is referenced by a regular object.
- Add a DT_NEEDED entry for it. */
+ Add a DT_NEEDED entry for it. Issue an error if
+ --no-add-needed is used. */
+ if ((elf_dyn_lib_class (abfd) & DYN_NO_NEEDED) != 0)
+ {
+ (*_bfd_error_handler)
+ (_("%s: invalid DSO for symbol `%s' definition"),
+ abfd, name);
+ bfd_set_error (bfd_error_bad_value);
+ goto error_free_vers;
+ }
+
+ elf_dyn_lib_class (abfd) &= ~DYN_AS_NEEDED;
+
add_needed = TRUE;
- ret = elf_add_dt_needed_tag (info, soname, add_needed);
+ ret = elf_add_dt_needed_tag (abfd, info, soname, add_needed);
if (ret < 0)
goto error_free_vers;
free (isymbuf);
isymbuf = NULL;
+ if (!add_needed
+ && (elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0)
+ {
+ /* Remove symbols defined in an as-needed shared lib that wasn't
+ needed. */
+ struct elf_smash_syms_data inf;
+ inf.not_needed = abfd;
+ inf.htab = hash_table;
+ inf.twiddled = FALSE;
+ elf_link_hash_traverse (hash_table, elf_smash_syms, &inf);
+ if (inf.twiddled)
+ bfd_link_repair_undef_list (&hash_table->root);
+ weaks = NULL;
+ }
+
/* Now set the weakdefs field correctly for all the weak defined
symbols we found. The only way to do this is to search all the
symbols. Since we only need the information for non functions in
size_t i, j, idx;
hlook = weaks;
- weaks = hlook->weakdef;
- hlook->weakdef = NULL;
+ weaks = hlook->u.weakdef;
+ hlook->u.weakdef = NULL;
BFD_ASSERT (hlook->root.type == bfd_link_hash_defined
|| hlook->root.type == bfd_link_hash_defweak
i = idx + 1;
else
{
- long sdiff = slook - h->root.u.def.section;
+ long sdiff = slook->id - h->root.u.def.section->id;
if (sdiff < 0)
j = idx;
else if (sdiff > 0)
break;
else if (h != hlook)
{
- hlook->weakdef = h;
+ hlook->u.weakdef = h;
/* If the weak definition is in the list of dynamic
symbols, make sure the real definition is put
there as well. */
if (hlook->dynindx != -1 && h->dynindx == -1)
{
- if (! _bfd_elf_link_record_dynamic_symbol (info,
- h))
+ if (! bfd_elf_link_record_dynamic_symbol (info, h))
goto error_return;
}
real definition and the weak definition. */
if (h->dynindx != -1 && hlook->dynindx == -1)
{
- if (! _bfd_elf_link_record_dynamic_symbol (info,
- hlook))
+ if (! bfd_elf_link_record_dynamic_symbol (info, hlook))
goto error_return;
}
break;
free (sorted_sym_hash);
}
+ check_directives = get_elf_backend_data (abfd)->check_directives;
+ if (check_directives)
+ check_directives (abfd, info);
+
/* If this object is the same format as the output object, and it is
not a shared library, then let the backend look through the
relocs.
secdata = elf_section_data (stab);
if (! _bfd_link_section_stabs (abfd,
- & hash_table->stab_info,
+ &hash_table->stab_info,
stab, stabstr,
&secdata->sec_info,
&string_offset))
}
}
- if (! info->relocatable
- && ! dynamic
- && is_elf_hash_table (hash_table))
- {
- asection *s;
-
- for (s = abfd->sections; s != NULL; s = s->next)
- if ((s->flags & SEC_MERGE) != 0
- && !bfd_is_abs_section (s->output_section))
- {
- struct bfd_elf_section_data *secdata;
-
- secdata = elf_section_data (s);
- if (! _bfd_merge_section (abfd,
- & hash_table->merge_info,
- s, &secdata->sec_info))
- goto error_return;
- else if (secdata->sec_info)
- s->sec_info_type = ELF_INFO_TYPE_MERGE;
- }
- }
-
- if (is_elf_hash_table (hash_table))
+ if (is_elf_hash_table (hash_table) && add_needed)
{
/* Add this bfd to the loaded list. */
struct elf_link_loaded_list *n;
return FALSE;
}
-/* Add symbols from an ELF archive file to the linker hash table. We
- don't use _bfd_generic_link_add_archive_symbols because of a
- problem which arises on UnixWare. The UnixWare libc.so is an
- archive which includes an entry libc.so.1 which defines a bunch of
- symbols. The libc.so archive also includes a number of other
- object files, which also define symbols, some of which are the same
- as those defined in libc.so.1. Correct linking requires that we
- consider each object file in turn, and include it if it defines any
- symbols we need. _bfd_generic_link_add_archive_symbols does not do
- this; it looks through the list of undefined symbols, and includes
- any object file which defines them. When this algorithm is used on
- UnixWare, it winds up pulling in libc.so.1 early and defining a
- bunch of symbols. This means that some of the other objects in the
+/* Return the linker hash table entry of a symbol that might be
+ satisfied by an archive symbol. Return -1 on error. */
+
+struct elf_link_hash_entry *
+_bfd_elf_archive_symbol_lookup (bfd *abfd,
+ struct bfd_link_info *info,
+ const char *name)
+{
+ struct elf_link_hash_entry *h;
+ char *p, *copy;
+ size_t len, first;
+
+ h = elf_link_hash_lookup (elf_hash_table (info), name, FALSE, FALSE, FALSE);
+ if (h != NULL)
+ return h;
+
+ /* If this is a default version (the name contains @@), look up the
+ symbol again with only one `@' as well as without the version.
+ The effect is that references to the symbol with and without the
+ version will be matched by the default symbol in the archive. */
+
+ p = strchr (name, ELF_VER_CHR);
+ if (p == NULL || p[1] != ELF_VER_CHR)
+ return h;
+
+ /* First check with only one `@'. */
+ len = strlen (name);
+ copy = bfd_alloc (abfd, len);
+ if (copy == NULL)
+ return (struct elf_link_hash_entry *) 0 - 1;
+
+ first = p - name + 1;
+ memcpy (copy, name, first);
+ memcpy (copy + first, name + first + 1, len - first);
+
+ h = elf_link_hash_lookup (elf_hash_table (info), copy, FALSE, FALSE, FALSE);
+ if (h == NULL)
+ {
+ /* We also need to check references to the symbol without the
+ version. */
+ copy[first - 1] = '\0';
+ h = elf_link_hash_lookup (elf_hash_table (info), copy,
+ FALSE, FALSE, FALSE);
+ }
+
+ bfd_release (abfd, copy);
+ return h;
+}
+
+/* Add symbols from an ELF archive file to the linker hash table. We
+ don't use _bfd_generic_link_add_archive_symbols because of a
+ problem which arises on UnixWare. The UnixWare libc.so is an
+ archive which includes an entry libc.so.1 which defines a bunch of
+ symbols. The libc.so archive also includes a number of other
+ object files, which also define symbols, some of which are the same
+ as those defined in libc.so.1. Correct linking requires that we
+ consider each object file in turn, and include it if it defines any
+ symbols we need. _bfd_generic_link_add_archive_symbols does not do
+ this; it looks through the list of undefined symbols, and includes
+ any object file which defines them. When this algorithm is used on
+ UnixWare, it winds up pulling in libc.so.1 early and defining a
+ bunch of symbols. This means that some of the other objects in the
archive are not included in the link, which is incorrect since they
precede libc.so.1 in the archive.
carsym *symdefs;
bfd_boolean loop;
bfd_size_type amt;
+ const struct elf_backend_data *bed;
+ struct elf_link_hash_entry * (*archive_symbol_lookup)
+ (bfd *, struct bfd_link_info *, const char *);
if (! bfd_has_map (abfd))
{
goto error_return;
symdefs = bfd_ardata (abfd)->symdefs;
+ bed = get_elf_backend_data (abfd);
+ archive_symbol_lookup = bed->elf_backend_archive_symbol_lookup;
do
{
continue;
}
- h = elf_link_hash_lookup (elf_hash_table (info), symdef->name,
- FALSE, FALSE, FALSE);
-
- if (h == NULL)
- {
- char *p, *copy;
- size_t len, first;
-
- /* If this is a default version (the name contains @@),
- look up the symbol again with only one `@' as well
- as without the version. The effect is that references
- to the symbol with and without the version will be
- matched by the default symbol in the archive. */
-
- p = strchr (symdef->name, ELF_VER_CHR);
- if (p == NULL || p[1] != ELF_VER_CHR)
- continue;
-
- /* First check with only one `@'. */
- len = strlen (symdef->name);
- copy = bfd_alloc (abfd, len);
- if (copy == NULL)
- goto error_return;
- first = p - symdef->name + 1;
- memcpy (copy, symdef->name, first);
- memcpy (copy + first, symdef->name + first + 1, len - first);
-
- h = elf_link_hash_lookup (elf_hash_table (info), copy,
- FALSE, FALSE, FALSE);
-
- if (h == NULL)
- {
- /* We also need to check references to the symbol
- without the version. */
-
- copy[first - 1] = '\0';
- h = elf_link_hash_lookup (elf_hash_table (info),
- copy, FALSE, FALSE, FALSE);
- }
-
- bfd_release (abfd, copy);
- }
+ h = archive_symbol_lookup (abfd, info, symdef->name);
+ if (h == (struct elf_link_hash_entry *) 0 - 1)
+ goto error_return;
if (h == NULL)
continue;
/* And store it in the struct so that we can put it in the hash table
later. */
- h->elf_hash_value = ha;
+ h->u.elf_hash_value = ha;
if (alc != NULL)
free (alc);
if (!is_elf_hash_table (info->hash))
return TRUE;
+ elf_tdata (output_bfd)->relro = info->relro;
if (info->execstack)
elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | PF_X;
else if (info->noexecstack)
{
asection *s;
- if (inputobj->flags & DYNAMIC)
+ if (inputobj->flags & (DYNAMIC | BFD_LINKER_CREATED))
continue;
s = bfd_get_section_by_name (inputobj, ".note.GNU-stack");
if (s)
/* Mark this version if there is a definition and it is
not defined in a shared object. */
if (newh != NULL
- && ((newh->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_DYNAMIC) == 0)
+ && !newh->def_dynamic
&& (newh->root.type == bfd_link_hash_defined
|| newh->root.type == bfd_link_hash_defweak))
d->symver = 1;
return FALSE;
/* Add some entries to the .dynamic section. We fill in some of the
- values later, in elf_bfd_final_link, but we must add the entries
+ values later, in bfd_elf_final_link, but we must add the entries
now so that we know the final size of the .dynamic section. */
/* If there are initialization and/or finalization functions to
FALSE, FALSE)
: NULL);
if (h != NULL
- && (h->elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR
- | ELF_LINK_HASH_DEF_REGULAR)) != 0)
+ && (h->ref_regular
+ || h->def_regular))
{
if (!_bfd_elf_add_dynamic_entry (info, DT_INIT, 0))
return FALSE;
FALSE, FALSE)
: NULL);
if (h != NULL
- && (h->elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR
- | ELF_LINK_HASH_DEF_REGULAR)) != 0)
+ && (h->ref_regular
+ || h->def_regular))
{
if (!_bfd_elf_add_dynamic_entry (info, DT_FINI, 0))
return FALSE;
== SHT_PREINIT_ARRAY)
{
(*_bfd_error_handler)
- (_("%s: .preinit_array section is not allowed in DSO"),
- bfd_archive_filename (sub));
+ (_("%B: .preinit_array section is not allowed in DSO"),
+ sub);
break;
}
if (elf_hash_table (info)->dynamic_sections_created)
{
bfd_size_type dynsymcount;
+ unsigned long section_sym_count;
asection *s;
size_t bucketcount = 0;
size_t hash_entry_size;
if (verdefs != NULL && verdefs->vernum == 0)
verdefs = verdefs->next;
- if (verdefs == NULL)
+ if (verdefs == NULL && !info->create_default_symver)
_bfd_strip_section_from_output (info, s);
else
{
bfd_byte *p;
Elf_Internal_Verdef def;
Elf_Internal_Verdaux defaux;
+ struct bfd_link_hash_entry *bh;
+ struct elf_link_hash_entry *h;
+ const char *name;
cdefs = 0;
size = 0;
size += sizeof (Elf_External_Verdaux);
++cdefs;
+ /* Make space for the default version. */
+ if (info->create_default_symver)
+ {
+ size += sizeof (Elf_External_Verdef);
+ ++cdefs;
+ }
+
for (t = verdefs; t != NULL; t = t->next)
{
struct bfd_elf_version_deps *n;
size += sizeof (Elf_External_Verdaux);
}
- s->_raw_size = size;
- s->contents = bfd_alloc (output_bfd, s->_raw_size);
- if (s->contents == NULL && s->_raw_size != 0)
+ s->size = size;
+ s->contents = bfd_alloc (output_bfd, s->size);
+ if (s->contents == NULL && s->size != 0)
return FALSE;
/* Fill in the version definition section. */
def.vd_flags = VER_FLG_BASE;
def.vd_ndx = 1;
def.vd_cnt = 1;
- def.vd_aux = sizeof (Elf_External_Verdef);
- def.vd_next = (sizeof (Elf_External_Verdef)
- + sizeof (Elf_External_Verdaux));
+ if (info->create_default_symver)
+ {
+ def.vd_aux = 2 * sizeof (Elf_External_Verdef);
+ def.vd_next = sizeof (Elf_External_Verdef);
+ }
+ else
+ {
+ def.vd_aux = sizeof (Elf_External_Verdef);
+ def.vd_next = (sizeof (Elf_External_Verdef)
+ + sizeof (Elf_External_Verdaux));
+ }
if (soname_indx != (bfd_size_type) -1)
{
soname_indx);
def.vd_hash = bfd_elf_hash (soname);
defaux.vda_name = soname_indx;
+ name = soname;
}
else
{
- const char *name;
bfd_size_type indx;
name = basename (output_bfd->filename);
_bfd_elf_swap_verdef_out (output_bfd, &def,
(Elf_External_Verdef *) p);
p += sizeof (Elf_External_Verdef);
+ if (info->create_default_symver)
+ {
+ /* Add a symbol representing this version. */
+ bh = NULL;
+ if (! (_bfd_generic_link_add_one_symbol
+ (info, dynobj, name, BSF_GLOBAL, bfd_abs_section_ptr,
+ 0, NULL, FALSE,
+ get_elf_backend_data (dynobj)->collect, &bh)))
+ return FALSE;
+ h = (struct elf_link_hash_entry *) bh;
+ h->non_elf = 0;
+ h->def_regular = 1;
+ h->type = STT_OBJECT;
+ h->verinfo.vertree = NULL;
+
+ if (! bfd_elf_link_record_dynamic_symbol (info, h))
+ return FALSE;
+
+ /* Create a duplicate of the base version with the same
+ aux block, but different flags. */
+ def.vd_flags = 0;
+ def.vd_ndx = 2;
+ def.vd_aux = sizeof (Elf_External_Verdef);
+ if (verdefs)
+ def.vd_next = (sizeof (Elf_External_Verdef)
+ + sizeof (Elf_External_Verdaux));
+ else
+ def.vd_next = 0;
+ _bfd_elf_swap_verdef_out (output_bfd, &def,
+ (Elf_External_Verdef *) p);
+ p += sizeof (Elf_External_Verdef);
+ }
_bfd_elf_swap_verdaux_out (output_bfd, &defaux,
(Elf_External_Verdaux *) p);
p += sizeof (Elf_External_Verdaux);
{
unsigned int cdeps;
struct bfd_elf_version_deps *n;
- struct elf_link_hash_entry *h;
- struct bfd_link_hash_entry *bh;
cdeps = 0;
for (n = t->deps; n != NULL; n = n->next)
get_elf_backend_data (dynobj)->collect, &bh)))
return FALSE;
h = (struct elf_link_hash_entry *) bh;
- h->elf_link_hash_flags &= ~ ELF_LINK_NON_ELF;
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
+ h->non_elf = 0;
+ h->def_regular = 1;
h->type = STT_OBJECT;
h->verinfo.vertree = t;
- if (! _bfd_elf_link_record_dynamic_symbol (info, h))
+ if (! bfd_elf_link_record_dynamic_symbol (info, h))
return FALSE;
def.vd_version = VER_DEF_CURRENT;
&& t->locals.list == NULL
&& ! t->used)
def.vd_flags |= VER_FLG_WEAK;
- def.vd_ndx = t->vernum + 1;
+ def.vd_ndx = t->vernum + (info->create_default_symver ? 2 : 1);
def.vd_cnt = cdeps + 1;
def.vd_hash = bfd_elf_hash (t->name);
def.vd_aux = sizeof (Elf_External_Verdef);
size += sizeof (Elf_External_Vernaux);
}
- s->_raw_size = size;
- s->contents = bfd_alloc (output_bfd, s->_raw_size);
+ s->size = size;
+ s->contents = bfd_alloc (output_bfd, s->size);
if (s->contents == NULL)
return FALSE;
Next come all of the back-end allocated local dynamic syms,
followed by the rest of the global symbols. */
- dynsymcount = _bfd_elf_link_renumber_dynsyms (output_bfd, info);
+ dynsymcount = _bfd_elf_link_renumber_dynsyms (output_bfd, info,
+ §ion_sym_count);
/* Work out the size of the symbol version section. */
s = bfd_get_section_by_name (dynobj, ".gnu.version");
BFD_ASSERT (s != NULL);
if (dynsymcount == 0
- || (verdefs == NULL && elf_tdata (output_bfd)->verref == NULL))
+ || (verdefs == NULL && elf_tdata (output_bfd)->verref == NULL
+ && !info->create_default_symver))
{
_bfd_strip_section_from_output (info, s);
/* The DYNSYMCOUNT might have changed if we were going to
output a dynamic symbol table entry for S. */
- dynsymcount = _bfd_elf_link_renumber_dynsyms (output_bfd, info);
+ dynsymcount = _bfd_elf_link_renumber_dynsyms (output_bfd, info,
+ §ion_sym_count);
}
else
{
- s->_raw_size = dynsymcount * sizeof (Elf_External_Versym);
- s->contents = bfd_zalloc (output_bfd, s->_raw_size);
+ s->size = dynsymcount * sizeof (Elf_External_Versym);
+ s->contents = bfd_zalloc (output_bfd, s->size);
if (s->contents == NULL)
return FALSE;
section as we went along in elf_link_add_object_symbols. */
s = bfd_get_section_by_name (dynobj, ".dynsym");
BFD_ASSERT (s != NULL);
- s->_raw_size = dynsymcount * bed->s->sizeof_sym;
- s->contents = bfd_alloc (output_bfd, s->_raw_size);
- if (s->contents == NULL && s->_raw_size != 0)
- return FALSE;
+ s->size = dynsymcount * bed->s->sizeof_sym;
if (dynsymcount != 0)
{
- Elf_Internal_Sym isym;
+ s->contents = bfd_alloc (output_bfd, s->size);
+ if (s->contents == NULL)
+ return FALSE;
- /* The first entry in .dynsym is a dummy symbol. */
- isym.st_value = 0;
- isym.st_size = 0;
- isym.st_name = 0;
- isym.st_info = 0;
- isym.st_other = 0;
- isym.st_shndx = 0;
- bed->s->swap_symbol_out (output_bfd, &isym, s->contents, 0);
+ /* The first entry in .dynsym is a dummy symbol.
+ Clear all the section syms, in case we don't output them all. */
+ ++section_sym_count;
+ memset (s->contents, 0, section_sym_count * bed->s->sizeof_sym);
}
/* Compute the size of the hashing table. As a side effect this
s = bfd_get_section_by_name (dynobj, ".hash");
BFD_ASSERT (s != NULL);
hash_entry_size = elf_section_data (s)->this_hdr.sh_entsize;
- s->_raw_size = ((2 + bucketcount + dynsymcount) * hash_entry_size);
- s->contents = bfd_zalloc (output_bfd, s->_raw_size);
+ s->size = ((2 + bucketcount + dynsymcount) * hash_entry_size);
+ s->contents = bfd_zalloc (output_bfd, s->size);
if (s->contents == NULL)
return FALSE;
elf_finalize_dynstr (output_bfd, info);
- s->_raw_size = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr);
+ s->size = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr);
for (dtagcount = 0; dtagcount <= info->spare_dynamic_tags; ++dtagcount)
if (!_bfd_elf_add_dynamic_entry (info, DT_NULL, 0))
return TRUE;
}
+
+/* Final phase of ELF linker. */
+
+/* A structure we use to avoid passing large numbers of arguments. */
+
+struct elf_final_link_info
+{
+ /* General link information. */
+ struct bfd_link_info *info;
+ /* Output BFD. */
+ bfd *output_bfd;
+ /* Symbol string table. */
+ struct bfd_strtab_hash *symstrtab;
+ /* .dynsym section. */
+ asection *dynsym_sec;
+ /* .hash section. */
+ asection *hash_sec;
+ /* symbol version section (.gnu.version). */
+ asection *symver_sec;
+ /* Buffer large enough to hold contents of any section. */
+ bfd_byte *contents;
+ /* Buffer large enough to hold external relocs of any section. */
+ void *external_relocs;
+ /* Buffer large enough to hold internal relocs of any section. */
+ Elf_Internal_Rela *internal_relocs;
+ /* Buffer large enough to hold external local symbols of any input
+ BFD. */
+ bfd_byte *external_syms;
+ /* And a buffer for symbol section indices. */
+ Elf_External_Sym_Shndx *locsym_shndx;
+ /* Buffer large enough to hold internal local symbols of any input
+ BFD. */
+ Elf_Internal_Sym *internal_syms;
+ /* Array large enough to hold a symbol index for each local symbol
+ of any input BFD. */
+ long *indices;
+ /* Array large enough to hold a section pointer for each local
+ symbol of any input BFD. */
+ asection **sections;
+ /* Buffer to hold swapped out symbols. */
+ bfd_byte *symbuf;
+ /* And one for symbol section indices. */
+ Elf_External_Sym_Shndx *symshndxbuf;
+ /* Number of swapped out symbols in buffer. */
+ size_t symbuf_count;
+ /* Number of symbols which fit in symbuf. */
+ size_t symbuf_size;
+ /* And same for symshndxbuf. */
+ size_t shndxbuf_size;
+};
+
+/* This struct is used to pass information to elf_link_output_extsym. */
+
+struct elf_outext_info
+{
+ bfd_boolean failed;
+ bfd_boolean localsyms;
+ struct elf_final_link_info *finfo;
+};
+
+/* When performing a relocatable link, the input relocations are
+ preserved. But, if they reference global symbols, the indices
+ referenced must be updated. Update all the relocations in
+ REL_HDR (there are COUNT of them), using the data in REL_HASH. */
+
+static void
+elf_link_adjust_relocs (bfd *abfd,
+ Elf_Internal_Shdr *rel_hdr,
+ unsigned int count,
+ struct elf_link_hash_entry **rel_hash)
+{
+ unsigned int i;
+ const struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ bfd_byte *erela;
+ void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *);
+ void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *);
+ bfd_vma r_type_mask;
+ int r_sym_shift;
+
+ if (rel_hdr->sh_entsize == bed->s->sizeof_rel)
+ {
+ swap_in = bed->s->swap_reloc_in;
+ swap_out = bed->s->swap_reloc_out;
+ }
+ else if (rel_hdr->sh_entsize == bed->s->sizeof_rela)
+ {
+ swap_in = bed->s->swap_reloca_in;
+ swap_out = bed->s->swap_reloca_out;
+ }
+ else
+ abort ();
+
+ if (bed->s->int_rels_per_ext_rel > MAX_INT_RELS_PER_EXT_REL)
+ abort ();
+
+ if (bed->s->arch_size == 32)
+ {
+ r_type_mask = 0xff;
+ r_sym_shift = 8;
+ }
+ else
+ {
+ r_type_mask = 0xffffffff;
+ r_sym_shift = 32;
+ }
+
+ erela = rel_hdr->contents;
+ for (i = 0; i < count; i++, rel_hash++, erela += rel_hdr->sh_entsize)
+ {
+ Elf_Internal_Rela irela[MAX_INT_RELS_PER_EXT_REL];
+ unsigned int j;
+
+ if (*rel_hash == NULL)
+ continue;
+
+ BFD_ASSERT ((*rel_hash)->indx >= 0);
+
+ (*swap_in) (abfd, erela, irela);
+ for (j = 0; j < bed->s->int_rels_per_ext_rel; j++)
+ irela[j].r_info = ((bfd_vma) (*rel_hash)->indx << r_sym_shift
+ | (irela[j].r_info & r_type_mask));
+ (*swap_out) (abfd, irela, erela);
+ }
+}
+
+struct elf_link_sort_rela
+{
+ union {
+ bfd_vma offset;
+ bfd_vma sym_mask;
+ } u;
+ enum elf_reloc_type_class type;
+ /* We use this as an array of size int_rels_per_ext_rel. */
+ Elf_Internal_Rela rela[1];
+};
+
+static int
+elf_link_sort_cmp1 (const void *A, const void *B)
+{
+ const struct elf_link_sort_rela *a = A;
+ const struct elf_link_sort_rela *b = B;
+ int relativea, relativeb;
+
+ relativea = a->type == reloc_class_relative;
+ relativeb = b->type == reloc_class_relative;
+
+ if (relativea < relativeb)
+ return 1;
+ if (relativea > relativeb)
+ return -1;
+ if ((a->rela->r_info & a->u.sym_mask) < (b->rela->r_info & b->u.sym_mask))
+ return -1;
+ if ((a->rela->r_info & a->u.sym_mask) > (b->rela->r_info & b->u.sym_mask))
+ return 1;
+ if (a->rela->r_offset < b->rela->r_offset)
+ return -1;
+ if (a->rela->r_offset > b->rela->r_offset)
+ return 1;
+ return 0;
+}
+
+static int
+elf_link_sort_cmp2 (const void *A, const void *B)
+{
+ const struct elf_link_sort_rela *a = A;
+ const struct elf_link_sort_rela *b = B;
+ int copya, copyb;
+
+ if (a->u.offset < b->u.offset)
+ return -1;
+ if (a->u.offset > b->u.offset)
+ return 1;
+ copya = (a->type == reloc_class_copy) * 2 + (a->type == reloc_class_plt);
+ copyb = (b->type == reloc_class_copy) * 2 + (b->type == reloc_class_plt);
+ if (copya < copyb)
+ return -1;
+ if (copya > copyb)
+ return 1;
+ if (a->rela->r_offset < b->rela->r_offset)
+ return -1;
+ if (a->rela->r_offset > b->rela->r_offset)
+ return 1;
+ return 0;
+}
+
+static size_t
+elf_link_sort_relocs (bfd *abfd, struct bfd_link_info *info, asection **psec)
+{
+ asection *reldyn;
+ bfd_size_type count, size;
+ size_t i, ret, sort_elt, ext_size;
+ bfd_byte *sort, *s_non_relative, *p;
+ struct elf_link_sort_rela *sq;
+ const struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ int i2e = bed->s->int_rels_per_ext_rel;
+ void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *);
+ void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *);
+ struct bfd_link_order *lo;
+ bfd_vma r_sym_mask;
+
+ reldyn = bfd_get_section_by_name (abfd, ".rela.dyn");
+ if (reldyn == NULL || reldyn->size == 0)
+ {
+ reldyn = bfd_get_section_by_name (abfd, ".rel.dyn");
+ if (reldyn == NULL || reldyn->size == 0)
+ return 0;
+ ext_size = bed->s->sizeof_rel;
+ swap_in = bed->s->swap_reloc_in;
+ swap_out = bed->s->swap_reloc_out;
+ }
+ else
+ {
+ ext_size = bed->s->sizeof_rela;
+ swap_in = bed->s->swap_reloca_in;
+ swap_out = bed->s->swap_reloca_out;
+ }
+ count = reldyn->size / ext_size;
+
+ size = 0;
+ for (lo = reldyn->link_order_head; lo != NULL; lo = lo->next)
+ if (lo->type == bfd_indirect_link_order)
+ {
+ asection *o = lo->u.indirect.section;
+ size += o->size;
+ }
+
+ if (size != reldyn->size)
+ return 0;
+
+ sort_elt = (sizeof (struct elf_link_sort_rela)
+ + (i2e - 1) * sizeof (Elf_Internal_Rela));
+ sort = bfd_zmalloc (sort_elt * count);
+ if (sort == NULL)
+ {
+ (*info->callbacks->warning)
+ (info, _("Not enough memory to sort relocations"), 0, abfd, 0, 0);
+ return 0;
+ }
+
+ if (bed->s->arch_size == 32)
+ r_sym_mask = ~(bfd_vma) 0xff;
+ else
+ r_sym_mask = ~(bfd_vma) 0xffffffff;
+
+ for (lo = reldyn->link_order_head; lo != NULL; lo = lo->next)
+ if (lo->type == bfd_indirect_link_order)
+ {
+ bfd_byte *erel, *erelend;
+ asection *o = lo->u.indirect.section;
+
+ if (o->contents == NULL && o->size != 0)
+ {
+ /* This is a reloc section that is being handled as a normal
+ section. See bfd_section_from_shdr. We can't combine
+ relocs in this case. */
+ free (sort);
+ return 0;
+ }
+ erel = o->contents;
+ erelend = o->contents + o->size;
+ p = sort + o->output_offset / ext_size * sort_elt;
+ while (erel < erelend)
+ {
+ struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p;
+ (*swap_in) (abfd, erel, s->rela);
+ s->type = (*bed->elf_backend_reloc_type_class) (s->rela);
+ s->u.sym_mask = r_sym_mask;
+ p += sort_elt;
+ erel += ext_size;
+ }
+ }
+
+ qsort (sort, count, sort_elt, elf_link_sort_cmp1);
+
+ for (i = 0, p = sort; i < count; i++, p += sort_elt)
+ {
+ struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p;
+ if (s->type != reloc_class_relative)
+ break;
+ }
+ ret = i;
+ s_non_relative = p;
+
+ sq = (struct elf_link_sort_rela *) s_non_relative;
+ for (; i < count; i++, p += sort_elt)
+ {
+ struct elf_link_sort_rela *sp = (struct elf_link_sort_rela *) p;
+ if (((sp->rela->r_info ^ sq->rela->r_info) & r_sym_mask) != 0)
+ sq = sp;
+ sp->u.offset = sq->rela->r_offset;
+ }
+
+ qsort (s_non_relative, count - ret, sort_elt, elf_link_sort_cmp2);
+
+ for (lo = reldyn->link_order_head; lo != NULL; lo = lo->next)
+ if (lo->type == bfd_indirect_link_order)
+ {
+ bfd_byte *erel, *erelend;
+ asection *o = lo->u.indirect.section;
+
+ erel = o->contents;
+ erelend = o->contents + o->size;
+ p = sort + o->output_offset / ext_size * sort_elt;
+ while (erel < erelend)
+ {
+ struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p;
+ (*swap_out) (abfd, s->rela, erel);
+ p += sort_elt;
+ erel += ext_size;
+ }
+ }
+
+ free (sort);
+ *psec = reldyn;
+ return ret;
+}
+
+/* Flush the output symbols to the file. */
+
+static bfd_boolean
+elf_link_flush_output_syms (struct elf_final_link_info *finfo,
+ const struct elf_backend_data *bed)
+{
+ if (finfo->symbuf_count > 0)
+ {
+ Elf_Internal_Shdr *hdr;
+ file_ptr pos;
+ bfd_size_type amt;
+
+ hdr = &elf_tdata (finfo->output_bfd)->symtab_hdr;
+ pos = hdr->sh_offset + hdr->sh_size;
+ amt = finfo->symbuf_count * bed->s->sizeof_sym;
+ if (bfd_seek (finfo->output_bfd, pos, SEEK_SET) != 0
+ || bfd_bwrite (finfo->symbuf, amt, finfo->output_bfd) != amt)
+ return FALSE;
+
+ hdr->sh_size += amt;
+ finfo->symbuf_count = 0;
+ }
+
+ return TRUE;
+}
+
+/* Add a symbol to the output symbol table. */
+
+static bfd_boolean
+elf_link_output_sym (struct elf_final_link_info *finfo,
+ const char *name,
+ Elf_Internal_Sym *elfsym,
+ asection *input_sec,
+ struct elf_link_hash_entry *h)
+{
+ bfd_byte *dest;
+ Elf_External_Sym_Shndx *destshndx;
+ bfd_boolean (*output_symbol_hook)
+ (struct bfd_link_info *, const char *, Elf_Internal_Sym *, asection *,
+ struct elf_link_hash_entry *);
+ const struct elf_backend_data *bed;
+
+ bed = get_elf_backend_data (finfo->output_bfd);
+ output_symbol_hook = bed->elf_backend_link_output_symbol_hook;
+ if (output_symbol_hook != NULL)
+ {
+ if (! (*output_symbol_hook) (finfo->info, name, elfsym, input_sec, h))
+ return FALSE;
+ }
+
+ if (name == NULL || *name == '\0')
+ elfsym->st_name = 0;
+ else if (input_sec->flags & SEC_EXCLUDE)
+ elfsym->st_name = 0;
+ else
+ {
+ elfsym->st_name = (unsigned long) _bfd_stringtab_add (finfo->symstrtab,
+ name, TRUE, FALSE);
+ if (elfsym->st_name == (unsigned long) -1)
+ return FALSE;
+ }
+
+ if (finfo->symbuf_count >= finfo->symbuf_size)
+ {
+ if (! elf_link_flush_output_syms (finfo, bed))
+ return FALSE;
+ }
+
+ dest = finfo->symbuf + finfo->symbuf_count * bed->s->sizeof_sym;
+ destshndx = finfo->symshndxbuf;
+ if (destshndx != NULL)
+ {
+ if (bfd_get_symcount (finfo->output_bfd) >= finfo->shndxbuf_size)
+ {
+ bfd_size_type amt;
+
+ amt = finfo->shndxbuf_size * sizeof (Elf_External_Sym_Shndx);
+ finfo->symshndxbuf = destshndx = bfd_realloc (destshndx, amt * 2);
+ if (destshndx == NULL)
+ return FALSE;
+ memset ((char *) destshndx + amt, 0, amt);
+ finfo->shndxbuf_size *= 2;
+ }
+ destshndx += bfd_get_symcount (finfo->output_bfd);
+ }
+
+ bed->s->swap_symbol_out (finfo->output_bfd, elfsym, dest, destshndx);
+ finfo->symbuf_count += 1;
+ bfd_get_symcount (finfo->output_bfd) += 1;
+
+ return TRUE;
+}
+
+/* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in
+ allowing an unsatisfied unversioned symbol in the DSO to match a
+ versioned symbol that would normally require an explicit version.
+ We also handle the case that a DSO references a hidden symbol
+ which may be satisfied by a versioned symbol in another DSO. */
+
+static bfd_boolean
+elf_link_check_versioned_symbol (struct bfd_link_info *info,
+ const struct elf_backend_data *bed,
+ struct elf_link_hash_entry *h)
+{
+ bfd *abfd;
+ struct elf_link_loaded_list *loaded;
+
+ if (!is_elf_hash_table (info->hash))
+ return FALSE;
+
+ switch (h->root.type)
+ {
+ default:
+ abfd = NULL;
+ break;
+
+ case bfd_link_hash_undefined:
+ case bfd_link_hash_undefweak:
+ abfd = h->root.u.undef.abfd;
+ if ((abfd->flags & DYNAMIC) == 0
+ || (elf_dyn_lib_class (abfd) & DYN_DT_NEEDED) == 0)
+ return FALSE;
+ break;
+
+ case bfd_link_hash_defined:
+ case bfd_link_hash_defweak:
+ abfd = h->root.u.def.section->owner;
+ break;
+
+ case bfd_link_hash_common:
+ abfd = h->root.u.c.p->section->owner;
+ break;
+ }
+ BFD_ASSERT (abfd != NULL);
+
+ for (loaded = elf_hash_table (info)->loaded;
+ loaded != NULL;
+ loaded = loaded->next)
+ {
+ bfd *input;
+ Elf_Internal_Shdr *hdr;
+ bfd_size_type symcount;
+ bfd_size_type extsymcount;
+ bfd_size_type extsymoff;
+ Elf_Internal_Shdr *versymhdr;
+ Elf_Internal_Sym *isym;
+ Elf_Internal_Sym *isymend;
+ Elf_Internal_Sym *isymbuf;
+ Elf_External_Versym *ever;
+ Elf_External_Versym *extversym;
+
+ input = loaded->abfd;
+
+ /* We check each DSO for a possible hidden versioned definition. */
+ if (input == abfd
+ || (input->flags & DYNAMIC) == 0
+ || elf_dynversym (input) == 0)
+ continue;
+
+ hdr = &elf_tdata (input)->dynsymtab_hdr;
+
+ symcount = hdr->sh_size / bed->s->sizeof_sym;
+ if (elf_bad_symtab (input))
+ {
+ extsymcount = symcount;
+ extsymoff = 0;
+ }
+ else
+ {
+ extsymcount = symcount - hdr->sh_info;
+ extsymoff = hdr->sh_info;
+ }
+
+ if (extsymcount == 0)
+ continue;
+
+ isymbuf = bfd_elf_get_elf_syms (input, hdr, extsymcount, extsymoff,
+ NULL, NULL, NULL);
+ if (isymbuf == NULL)
+ return FALSE;
+
+ /* Read in any version definitions. */
+ versymhdr = &elf_tdata (input)->dynversym_hdr;
+ extversym = bfd_malloc (versymhdr->sh_size);
+ if (extversym == NULL)
+ goto error_ret;
+
+ if (bfd_seek (input, versymhdr->sh_offset, SEEK_SET) != 0
+ || (bfd_bread (extversym, versymhdr->sh_size, input)
+ != versymhdr->sh_size))
+ {
+ free (extversym);
+ error_ret:
+ free (isymbuf);
+ return FALSE;
+ }
+
+ ever = extversym + extsymoff;
+ isymend = isymbuf + extsymcount;
+ for (isym = isymbuf; isym < isymend; isym++, ever++)
+ {
+ const char *name;
+ Elf_Internal_Versym iver;
+ unsigned short version_index;
+
+ if (ELF_ST_BIND (isym->st_info) == STB_LOCAL
+ || isym->st_shndx == SHN_UNDEF)
+ continue;
+
+ name = bfd_elf_string_from_elf_section (input,
+ hdr->sh_link,
+ isym->st_name);
+ if (strcmp (name, h->root.root.string) != 0)
+ continue;
+
+ _bfd_elf_swap_versym_in (input, ever, &iver);
+
+ if ((iver.vs_vers & VERSYM_HIDDEN) == 0)
+ {
+ /* If we have a non-hidden versioned sym, then it should
+ have provided a definition for the undefined sym. */
+ abort ();
+ }
+
+ version_index = iver.vs_vers & VERSYM_VERSION;
+ if (version_index == 1 || version_index == 2)
+ {
+ /* This is the base or first version. We can use it. */
+ free (extversym);
+ free (isymbuf);
+ return TRUE;
+ }
+ }
+
+ free (extversym);
+ free (isymbuf);
+ }
+
+ return FALSE;
+}
+
+/* Add an external symbol to the symbol table. This is called from
+ the hash table traversal routine. When generating a shared object,
+ we go through the symbol table twice. The first time we output
+ anything that might have been forced to local scope in a version
+ script. The second time we output the symbols that are still
+ global symbols. */
+
+static bfd_boolean
+elf_link_output_extsym (struct elf_link_hash_entry *h, void *data)
+{
+ struct elf_outext_info *eoinfo = data;
+ struct elf_final_link_info *finfo = eoinfo->finfo;
+ bfd_boolean strip;
+ Elf_Internal_Sym sym;
+ asection *input_sec;
+ const struct elf_backend_data *bed;
+
+ if (h->root.type == bfd_link_hash_warning)
+ {
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+ if (h->root.type == bfd_link_hash_new)
+ return TRUE;
+ }
+
+ /* Decide whether to output this symbol in this pass. */
+ if (eoinfo->localsyms)
+ {
+ if (!h->forced_local)
+ return TRUE;
+ }
+ else
+ {
+ if (h->forced_local)
+ return TRUE;
+ }
+
+ bed = get_elf_backend_data (finfo->output_bfd);
+
+ /* If we have an undefined symbol reference here then it must have
+ come from a shared library that is being linked in. (Undefined
+ references in regular files have already been handled). If we
+ are reporting errors for this situation then do so now. */
+ if (h->root.type == bfd_link_hash_undefined
+ && h->ref_dynamic
+ && !h->ref_regular
+ && ! elf_link_check_versioned_symbol (finfo->info, bed, h)
+ && finfo->info->unresolved_syms_in_shared_libs != RM_IGNORE)
+ {
+ if (! ((*finfo->info->callbacks->undefined_symbol)
+ (finfo->info, h->root.root.string, h->root.u.undef.abfd,
+ NULL, 0, finfo->info->unresolved_syms_in_shared_libs == RM_GENERATE_ERROR)))
+ {
+ eoinfo->failed = TRUE;
+ return FALSE;
+ }
+ }
+
+ /* We should also warn if a forced local symbol is referenced from
+ shared libraries. */
+ if (! finfo->info->relocatable
+ && (! finfo->info->shared)
+ && h->forced_local
+ && h->ref_dynamic
+ && !h->dynamic_def
+ && !h->dynamic_weak
+ && ! elf_link_check_versioned_symbol (finfo->info, bed, h))
+ {
+ (*_bfd_error_handler)
+ (_("%B: %s symbol `%s' in %B is referenced by DSO"),
+ finfo->output_bfd, h->root.u.def.section->owner,
+ ELF_ST_VISIBILITY (h->other) == STV_INTERNAL
+ ? "internal"
+ : ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
+ ? "hidden" : "local",
+ h->root.root.string);
+ eoinfo->failed = TRUE;
+ return FALSE;
+ }
+
+ /* We don't want to output symbols that have never been mentioned by
+ a regular file, or that we have been told to strip. However, if
+ h->indx is set to -2, the symbol is used by a reloc and we must
+ output it. */
+ if (h->indx == -2)
+ strip = FALSE;
+ else if ((h->def_dynamic
+ || h->ref_dynamic
+ || h->root.type == bfd_link_hash_new)
+ && !h->def_regular
+ && !h->ref_regular)
+ strip = TRUE;
+ else if (finfo->info->strip == strip_all)
+ strip = TRUE;
+ else if (finfo->info->strip == strip_some
+ && bfd_hash_lookup (finfo->info->keep_hash,
+ h->root.root.string, FALSE, FALSE) == NULL)
+ strip = TRUE;
+ else if (finfo->info->strip_discarded
+ && (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ && elf_discarded_section (h->root.u.def.section))
+ strip = TRUE;
+ else
+ strip = FALSE;
+
+ /* If we're stripping it, and it's not a dynamic symbol, there's
+ nothing else to do unless it is a forced local symbol. */
+ if (strip
+ && h->dynindx == -1
+ && !h->forced_local)
+ return TRUE;
+
+ sym.st_value = 0;
+ sym.st_size = h->size;
+ sym.st_other = h->other;
+ if (h->forced_local)
+ sym.st_info = ELF_ST_INFO (STB_LOCAL, h->type);
+ else if (h->root.type == bfd_link_hash_undefweak
+ || h->root.type == bfd_link_hash_defweak)
+ sym.st_info = ELF_ST_INFO (STB_WEAK, h->type);
+ else
+ sym.st_info = ELF_ST_INFO (STB_GLOBAL, h->type);
+
+ switch (h->root.type)
+ {
+ default:
+ case bfd_link_hash_new:
+ case bfd_link_hash_warning:
+ abort ();
+ return FALSE;
+
+ case bfd_link_hash_undefined:
+ case bfd_link_hash_undefweak:
+ input_sec = bfd_und_section_ptr;
+ sym.st_shndx = SHN_UNDEF;
+ break;
+
+ case bfd_link_hash_defined:
+ case bfd_link_hash_defweak:
+ {
+ input_sec = h->root.u.def.section;
+ if (input_sec->output_section != NULL)
+ {
+ sym.st_shndx =
+ _bfd_elf_section_from_bfd_section (finfo->output_bfd,
+ input_sec->output_section);
+ if (sym.st_shndx == SHN_BAD)
+ {
+ (*_bfd_error_handler)
+ (_("%B: could not find output section %A for input section %A"),
+ finfo->output_bfd, input_sec->output_section, input_sec);
+ eoinfo->failed = TRUE;
+ return FALSE;
+ }
+
+ /* ELF symbols in relocatable files are section relative,
+ but in nonrelocatable files they are virtual
+ addresses. */
+ sym.st_value = h->root.u.def.value + input_sec->output_offset;
+ if (! finfo->info->relocatable)
+ {
+ sym.st_value += input_sec->output_section->vma;
+ if (h->type == STT_TLS)
+ {
+ /* STT_TLS symbols are relative to PT_TLS segment
+ base. */
+ BFD_ASSERT (elf_hash_table (finfo->info)->tls_sec != NULL);
+ sym.st_value -= elf_hash_table (finfo->info)->tls_sec->vma;
+ }
+ }
+ }
+ else
+ {
+ BFD_ASSERT (input_sec->owner == NULL
+ || (input_sec->owner->flags & DYNAMIC) != 0);
+ sym.st_shndx = SHN_UNDEF;
+ input_sec = bfd_und_section_ptr;
+ }
+ }
+ break;
+
+ case bfd_link_hash_common:
+ input_sec = h->root.u.c.p->section;
+ sym.st_shndx = SHN_COMMON;
+ sym.st_value = 1 << h->root.u.c.p->alignment_power;
+ break;
+
+ case bfd_link_hash_indirect:
+ /* These symbols are created by symbol versioning. They point
+ to the decorated version of the name. For example, if the
+ symbol foo@@GNU_1.2 is the default, which should be used when
+ foo is used with no version, then we add an indirect symbol
+ foo which points to foo@@GNU_1.2. We ignore these symbols,
+ since the indirected symbol is already in the hash table. */
+ return TRUE;
+ }
+
+ /* Give the processor backend a chance to tweak the symbol value,
+ and also to finish up anything that needs to be done for this
+ symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for
+ forced local syms when non-shared is due to a historical quirk. */
+ if ((h->dynindx != -1
+ || h->forced_local)
+ && ((finfo->info->shared
+ && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
+ || h->root.type != bfd_link_hash_undefweak))
+ || !h->forced_local)
+ && elf_hash_table (finfo->info)->dynamic_sections_created)
+ {
+ if (! ((*bed->elf_backend_finish_dynamic_symbol)
+ (finfo->output_bfd, finfo->info, h, &sym)))
+ {
+ eoinfo->failed = TRUE;
+ return FALSE;
+ }
+ }
+
+ /* If we are marking the symbol as undefined, and there are no
+ non-weak references to this symbol from a regular object, then
+ mark the symbol as weak undefined; if there are non-weak
+ references, mark the symbol as strong. We can't do this earlier,
+ because it might not be marked as undefined until the
+ finish_dynamic_symbol routine gets through with it. */
+ if (sym.st_shndx == SHN_UNDEF
+ && h->ref_regular
+ && (ELF_ST_BIND (sym.st_info) == STB_GLOBAL
+ || ELF_ST_BIND (sym.st_info) == STB_WEAK))
+ {
+ int bindtype;
+
+ if (h->ref_regular_nonweak)
+ bindtype = STB_GLOBAL;
+ else
+ bindtype = STB_WEAK;
+ sym.st_info = ELF_ST_INFO (bindtype, ELF_ST_TYPE (sym.st_info));
+ }
+
+ /* If a non-weak symbol with non-default visibility is not defined
+ locally, it is a fatal error. */
+ if (! finfo->info->relocatable
+ && ELF_ST_VISIBILITY (sym.st_other) != STV_DEFAULT
+ && ELF_ST_BIND (sym.st_info) != STB_WEAK
+ && h->root.type == bfd_link_hash_undefined
+ && !h->def_regular)
+ {
+ (*_bfd_error_handler)
+ (_("%B: %s symbol `%s' isn't defined"),
+ finfo->output_bfd,
+ ELF_ST_VISIBILITY (sym.st_other) == STV_PROTECTED
+ ? "protected"
+ : ELF_ST_VISIBILITY (sym.st_other) == STV_INTERNAL
+ ? "internal" : "hidden",
+ h->root.root.string);
+ eoinfo->failed = TRUE;
+ return FALSE;
+ }
+
+ /* If this symbol should be put in the .dynsym section, then put it
+ there now. We already know the symbol index. We also fill in
+ the entry in the .hash section. */
+ if (h->dynindx != -1
+ && elf_hash_table (finfo->info)->dynamic_sections_created)
+ {
+ size_t bucketcount;
+ size_t bucket;
+ size_t hash_entry_size;
+ bfd_byte *bucketpos;
+ bfd_vma chain;
+ bfd_byte *esym;
+
+ sym.st_name = h->dynstr_index;
+ esym = finfo->dynsym_sec->contents + h->dynindx * bed->s->sizeof_sym;
+ bed->s->swap_symbol_out (finfo->output_bfd, &sym, esym, 0);
+
+ bucketcount = elf_hash_table (finfo->info)->bucketcount;
+ bucket = h->u.elf_hash_value % bucketcount;
+ hash_entry_size
+ = elf_section_data (finfo->hash_sec)->this_hdr.sh_entsize;
+ bucketpos = ((bfd_byte *) finfo->hash_sec->contents
+ + (bucket + 2) * hash_entry_size);
+ chain = bfd_get (8 * hash_entry_size, finfo->output_bfd, bucketpos);
+ bfd_put (8 * hash_entry_size, finfo->output_bfd, h->dynindx, bucketpos);
+ bfd_put (8 * hash_entry_size, finfo->output_bfd, chain,
+ ((bfd_byte *) finfo->hash_sec->contents
+ + (bucketcount + 2 + h->dynindx) * hash_entry_size));
+
+ if (finfo->symver_sec != NULL && finfo->symver_sec->contents != NULL)
+ {
+ Elf_Internal_Versym iversym;
+ Elf_External_Versym *eversym;
+
+ if (!h->def_regular)
+ {
+ if (h->verinfo.verdef == NULL)
+ iversym.vs_vers = 0;
+ else
+ iversym.vs_vers = h->verinfo.verdef->vd_exp_refno + 1;
+ }
+ else
+ {
+ if (h->verinfo.vertree == NULL)
+ iversym.vs_vers = 1;
+ else
+ iversym.vs_vers = h->verinfo.vertree->vernum + 1;
+ if (finfo->info->create_default_symver)
+ iversym.vs_vers++;
+ }
+
+ if (h->hidden)
+ iversym.vs_vers |= VERSYM_HIDDEN;
+
+ eversym = (Elf_External_Versym *) finfo->symver_sec->contents;
+ eversym += h->dynindx;
+ _bfd_elf_swap_versym_out (finfo->output_bfd, &iversym, eversym);
+ }
+ }
+
+ /* If we're stripping it, then it was just a dynamic symbol, and
+ there's nothing else to do. */
+ if (strip || (input_sec->flags & SEC_EXCLUDE) != 0)
+ return TRUE;
+
+ h->indx = bfd_get_symcount (finfo->output_bfd);
+
+ if (! elf_link_output_sym (finfo, h->root.root.string, &sym, input_sec, h))
+ {
+ eoinfo->failed = TRUE;
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+/* Return TRUE if special handling is done for relocs in SEC against
+ symbols defined in discarded sections. */
+
+static bfd_boolean
+elf_section_ignore_discarded_relocs (asection *sec)
+{
+ const struct elf_backend_data *bed;
+
+ switch (sec->sec_info_type)
+ {
+ case ELF_INFO_TYPE_STABS:
+ case ELF_INFO_TYPE_EH_FRAME:
+ return TRUE;
+ default:
+ break;
+ }
+
+ bed = get_elf_backend_data (sec->owner);
+ if (bed->elf_backend_ignore_discarded_relocs != NULL
+ && (*bed->elf_backend_ignore_discarded_relocs) (sec))
+ return TRUE;
+
+ return FALSE;
+}
+
+enum action_discarded
+ {
+ COMPLAIN = 1,
+ PRETEND = 2
+ };
+
+/* Return a mask saying how ld should treat relocations in SEC against
+ symbols defined in discarded sections. If this function returns
+ COMPLAIN set, ld will issue a warning message. If this function
+ returns PRETEND set, and the discarded section was link-once and the
+ same size as the kept link-once section, ld will pretend that the
+ symbol was actually defined in the kept section. Otherwise ld will
+ zero the reloc (at least that is the intent, but some cooperation by
+ the target dependent code is needed, particularly for REL targets). */
+
+static unsigned int
+elf_action_discarded (asection *sec)
+{
+ if (sec->flags & SEC_DEBUGGING)
+ return PRETEND;
+
+ if (strcmp (".eh_frame", sec->name) == 0)
+ return 0;
+
+ if (strcmp (".gcc_except_table", sec->name) == 0)
+ return 0;
+
+ if (strcmp (".PARISC.unwind", sec->name) == 0)
+ return 0;
+
+ if (strcmp (".fixup", sec->name) == 0)
+ return 0;
+
+ return COMPLAIN | PRETEND;
+}
+
+/* Find a match between a section and a member of a section group. */
+
+static asection *
+match_group_member (asection *sec, asection *group)
+{
+ asection *first = elf_next_in_group (group);
+ asection *s = first;
+
+ while (s != NULL)
+ {
+ if (bfd_elf_match_symbols_in_sections (s, sec))
+ return s;
+
+ if (s == first)
+ break;
+ }
+
+ return NULL;
+}
+
+/* Check if the kept section of a discarded section SEC can be used
+ to replace it. Return the replacement if it is OK. Otherwise return
+ NULL. */
+
+asection *
+_bfd_elf_check_kept_section (asection *sec)
+{
+ asection *kept;
+
+ kept = sec->kept_section;
+ if (kept != NULL)
+ {
+ if (elf_sec_group (sec) != NULL)
+ kept = match_group_member (sec, kept);
+ if (kept != NULL && sec->size != kept->size)
+ kept = NULL;
+ }
+ return kept;
+}
+
+/* Link an input file into the linker output file. This function
+ handles all the sections and relocations of the input file at once.
+ This is so that we only have to read the local symbols once, and
+ don't have to keep them in memory. */
+
+static bfd_boolean
+elf_link_input_bfd (struct elf_final_link_info *finfo, bfd *input_bfd)
+{
+ bfd_boolean (*relocate_section)
+ (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
+ Elf_Internal_Rela *, Elf_Internal_Sym *, asection **);
+ bfd *output_bfd;
+ Elf_Internal_Shdr *symtab_hdr;
+ size_t locsymcount;
+ size_t extsymoff;
+ Elf_Internal_Sym *isymbuf;
+ Elf_Internal_Sym *isym;
+ Elf_Internal_Sym *isymend;
+ long *pindex;
+ asection **ppsection;
+ asection *o;
+ const struct elf_backend_data *bed;
+ bfd_boolean emit_relocs;
+ struct elf_link_hash_entry **sym_hashes;
+
+ output_bfd = finfo->output_bfd;
+ bed = get_elf_backend_data (output_bfd);
+ relocate_section = bed->elf_backend_relocate_section;
+
+ /* If this is a dynamic object, we don't want to do anything here:
+ we don't want the local symbols, and we don't want the section
+ contents. */
+ if ((input_bfd->flags & DYNAMIC) != 0)
+ return TRUE;
+
+ emit_relocs = (finfo->info->relocatable
+ || finfo->info->emitrelocations
+ || bed->elf_backend_emit_relocs);
+
+ symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+ if (elf_bad_symtab (input_bfd))
+ {
+ locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym;
+ extsymoff = 0;
+ }
+ else
+ {
+ locsymcount = symtab_hdr->sh_info;
+ extsymoff = symtab_hdr->sh_info;
+ }
+
+ /* Read the local symbols. */
+ isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
+ if (isymbuf == NULL && locsymcount != 0)
+ {
+ isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, locsymcount, 0,
+ finfo->internal_syms,
+ finfo->external_syms,
+ finfo->locsym_shndx);
+ if (isymbuf == NULL)
+ return FALSE;
+ }
+
+ /* Find local symbol sections and adjust values of symbols in
+ SEC_MERGE sections. Write out those local symbols we know are
+ going into the output file. */
+ isymend = isymbuf + locsymcount;
+ for (isym = isymbuf, pindex = finfo->indices, ppsection = finfo->sections;
+ isym < isymend;
+ isym++, pindex++, ppsection++)
+ {
+ asection *isec;
+ const char *name;
+ Elf_Internal_Sym osym;
+
+ *pindex = -1;
+
+ if (elf_bad_symtab (input_bfd))
+ {
+ if (ELF_ST_BIND (isym->st_info) != STB_LOCAL)
+ {
+ *ppsection = NULL;
+ continue;
+ }
+ }
+
+ if (isym->st_shndx == SHN_UNDEF)
+ isec = bfd_und_section_ptr;
+ else if (isym->st_shndx < SHN_LORESERVE
+ || isym->st_shndx > SHN_HIRESERVE)
+ {
+ isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
+ if (isec
+ && isec->sec_info_type == ELF_INFO_TYPE_MERGE
+ && ELF_ST_TYPE (isym->st_info) != STT_SECTION)
+ isym->st_value =
+ _bfd_merged_section_offset (output_bfd, &isec,
+ elf_section_data (isec)->sec_info,
+ isym->st_value);
+ }
+ else if (isym->st_shndx == SHN_ABS)
+ isec = bfd_abs_section_ptr;
+ else if (isym->st_shndx == SHN_COMMON)
+ isec = bfd_com_section_ptr;
+ else
+ {
+ /* Who knows? */
+ isec = NULL;
+ }
+
+ *ppsection = isec;
+
+ /* Don't output the first, undefined, symbol. */
+ if (ppsection == finfo->sections)
+ continue;
+
+ if (ELF_ST_TYPE (isym->st_info) == STT_SECTION)
+ {
+ /* We never output section symbols. Instead, we use the
+ section symbol of the corresponding section in the output
+ file. */
+ continue;
+ }
+
+ /* If we are stripping all symbols, we don't want to output this
+ one. */
+ if (finfo->info->strip == strip_all)
+ continue;
+
+ /* If we are discarding all local symbols, we don't want to
+ output this one. If we are generating a relocatable output
+ file, then some of the local symbols may be required by
+ relocs; we output them below as we discover that they are
+ needed. */
+ if (finfo->info->discard == discard_all)
+ continue;
+
+ /* If this symbol is defined in a section which we are
+ discarding, we don't need to keep it, but note that
+ linker_mark is only reliable for sections that have contents.
+ For the benefit of the MIPS ELF linker, we check SEC_EXCLUDE
+ as well as linker_mark. */
+ if ((isym->st_shndx < SHN_LORESERVE || isym->st_shndx > SHN_HIRESERVE)
+ && (isec == NULL
+ || (! isec->linker_mark && (isec->flags & SEC_HAS_CONTENTS) != 0)
+ || (! finfo->info->relocatable
+ && (isec->flags & SEC_EXCLUDE) != 0)))
+ continue;
+
+ /* If the section is not in the output BFD's section list, it is not
+ being output. */
+ if (bfd_section_removed_from_list (output_bfd, isec->output_section))
+ continue;
+
+ /* Get the name of the symbol. */
+ name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link,
+ isym->st_name);
+ if (name == NULL)
+ return FALSE;
+
+ /* See if we are discarding symbols with this name. */
+ if ((finfo->info->strip == strip_some
+ && (bfd_hash_lookup (finfo->info->keep_hash, name, FALSE, FALSE)
+ == NULL))
+ || (((finfo->info->discard == discard_sec_merge
+ && (isec->flags & SEC_MERGE) && ! finfo->info->relocatable)
+ || finfo->info->discard == discard_l)
+ && bfd_is_local_label_name (input_bfd, name)))
+ continue;
+
+ /* If we get here, we are going to output this symbol. */
+
+ osym = *isym;
+
+ /* Adjust the section index for the output file. */
+ osym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd,
+ isec->output_section);
+ if (osym.st_shndx == SHN_BAD)
+ return FALSE;
+
+ *pindex = bfd_get_symcount (output_bfd);
+
+ /* ELF symbols in relocatable files are section relative, but
+ in executable files they are virtual addresses. Note that
+ this code assumes that all ELF sections have an associated
+ BFD section with a reasonable value for output_offset; below
+ we assume that they also have a reasonable value for
+ output_section. Any special sections must be set up to meet
+ these requirements. */
+ osym.st_value += isec->output_offset;
+ if (! finfo->info->relocatable)
+ {
+ osym.st_value += isec->output_section->vma;
+ if (ELF_ST_TYPE (osym.st_info) == STT_TLS)
+ {
+ /* STT_TLS symbols are relative to PT_TLS segment base. */
+ BFD_ASSERT (elf_hash_table (finfo->info)->tls_sec != NULL);
+ osym.st_value -= elf_hash_table (finfo->info)->tls_sec->vma;
+ }
+ }
+
+ if (! elf_link_output_sym (finfo, name, &osym, isec, NULL))
+ return FALSE;
+ }
+
+ /* Relocate the contents of each section. */
+ sym_hashes = elf_sym_hashes (input_bfd);
+ for (o = input_bfd->sections; o != NULL; o = o->next)
+ {
+ bfd_byte *contents;
+
+ if (! o->linker_mark)
+ {
+ /* This section was omitted from the link. */
+ continue;
+ }
+
+ if ((o->flags & SEC_HAS_CONTENTS) == 0
+ || (o->size == 0 && (o->flags & SEC_RELOC) == 0))
+ continue;
+
+ if ((o->flags & SEC_LINKER_CREATED) != 0)
+ {
+ /* Section was created by _bfd_elf_link_create_dynamic_sections
+ or somesuch. */
+ continue;
+ }
+
+ /* Get the contents of the section. They have been cached by a
+ relaxation routine. Note that o is a section in an input
+ file, so the contents field will not have been set by any of
+ the routines which work on output files. */
+ if (elf_section_data (o)->this_hdr.contents != NULL)
+ contents = elf_section_data (o)->this_hdr.contents;
+ else
+ {
+ bfd_size_type amt = o->rawsize ? o->rawsize : o->size;
+
+ contents = finfo->contents;
+ if (! bfd_get_section_contents (input_bfd, o, contents, 0, amt))
+ return FALSE;
+ }
+
+ if ((o->flags & SEC_RELOC) != 0)
+ {
+ Elf_Internal_Rela *internal_relocs;
+ bfd_vma r_type_mask;
+ int r_sym_shift;
+
+ /* Get the swapped relocs. */
+ internal_relocs
+ = _bfd_elf_link_read_relocs (input_bfd, o, finfo->external_relocs,
+ finfo->internal_relocs, FALSE);
+ if (internal_relocs == NULL
+ && o->reloc_count > 0)
+ return FALSE;
+
+ if (bed->s->arch_size == 32)
+ {
+ r_type_mask = 0xff;
+ r_sym_shift = 8;
+ }
+ else
+ {
+ r_type_mask = 0xffffffff;
+ r_sym_shift = 32;
+ }
+
+ /* Run through the relocs looking for any against symbols
+ from discarded sections and section symbols from
+ removed link-once sections. Complain about relocs
+ against discarded sections. Zero relocs against removed
+ link-once sections. Preserve debug information as much
+ as we can. */
+ if (!elf_section_ignore_discarded_relocs (o))
+ {
+ Elf_Internal_Rela *rel, *relend;
+ unsigned int action = elf_action_discarded (o);
+
+ rel = internal_relocs;
+ relend = rel + o->reloc_count * bed->s->int_rels_per_ext_rel;
+ for ( ; rel < relend; rel++)
+ {
+ unsigned long r_symndx = rel->r_info >> r_sym_shift;
+ asection **ps, *sec;
+ struct elf_link_hash_entry *h = NULL;
+ const char *sym_name;
+
+ if (r_symndx == STN_UNDEF)
+ continue;
+
+ if (r_symndx >= locsymcount
+ || (elf_bad_symtab (input_bfd)
+ && finfo->sections[r_symndx] == NULL))
+ {
+ h = sym_hashes[r_symndx - extsymoff];
+
+ /* Badly formatted input files can contain relocs that
+ reference non-existant symbols. Check here so that
+ we do not seg fault. */
+ if (h == NULL)
+ {
+ char buffer [32];
+
+ sprintf_vma (buffer, rel->r_info);
+ (*_bfd_error_handler)
+ (_("error: %B contains a reloc (0x%s) for section %A "
+ "that references a non-existent global symbol"),
+ input_bfd, o, buffer);
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
+
+ while (h->root.type == bfd_link_hash_indirect
+ || h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+ if (h->root.type != bfd_link_hash_defined
+ && h->root.type != bfd_link_hash_defweak)
+ continue;
+
+ ps = &h->root.u.def.section;
+ sym_name = h->root.root.string;
+ }
+ else
+ {
+ Elf_Internal_Sym *sym = isymbuf + r_symndx;
+ ps = &finfo->sections[r_symndx];
+ sym_name = bfd_elf_sym_name (input_bfd,
+ symtab_hdr,
+ sym, *ps);
+ }
+
+ /* Complain if the definition comes from a
+ discarded section. */
+ if ((sec = *ps) != NULL && elf_discarded_section (sec))
+ {
+ BFD_ASSERT (r_symndx != 0);
+ if (action & COMPLAIN)
+ {
+ (*_bfd_error_handler)
+ (_("`%s' referenced in section `%A' of %B: "
+ "defined in discarded section `%A' of %B"),
+ o, input_bfd, sec, sec->owner, sym_name);
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
+
+ /* Try to do the best we can to support buggy old
+ versions of gcc. If we've warned, or this is
+ debugging info, pretend that the symbol is
+ really defined in the kept linkonce section.
+ FIXME: This is quite broken. Modifying the
+ symbol here means we will be changing all later
+ uses of the symbol, not just in this section.
+ The only thing that makes this half reasonable
+ is that we warn in non-debug sections, and
+ debug sections tend to come after other
+ sections. */
+ if (action & PRETEND)
+ {
+ asection *kept;
+
+ kept = _bfd_elf_check_kept_section (sec);
+ if (kept != NULL)
+ {
+ *ps = kept;
+ continue;
+ }
+ }
+
+ /* Remove the symbol reference from the reloc, but
+ don't kill the reloc completely. This is so that
+ a zero value will be written into the section,
+ which may have non-zero contents put there by the
+ assembler. Zero in things like an eh_frame fde
+ pc_begin allows stack unwinders to recognize the
+ fde as bogus. */
+ rel->r_info &= r_type_mask;
+ rel->r_addend = 0;
+ }
+ }
+ }
+
+ /* Relocate the section by invoking a back end routine.
+
+ The back end routine is responsible for adjusting the
+ section contents as necessary, and (if using Rela relocs
+ and generating a relocatable output file) adjusting the
+ reloc addend as necessary.
+
+ The back end routine does not have to worry about setting
+ the reloc address or the reloc symbol index.
+
+ The back end routine is given a pointer to the swapped in
+ internal symbols, and can access the hash table entries
+ for the external symbols via elf_sym_hashes (input_bfd).
+
+ When generating relocatable output, the back end routine
+ must handle STB_LOCAL/STT_SECTION symbols specially. The
+ output symbol is going to be a section symbol
+ corresponding to the output section, which will require
+ the addend to be adjusted. */
+
+ if (! (*relocate_section) (output_bfd, finfo->info,
+ input_bfd, o, contents,
+ internal_relocs,
+ isymbuf,
+ finfo->sections))
+ return FALSE;
+
+ if (emit_relocs)
+ {
+ Elf_Internal_Rela *irela;
+ Elf_Internal_Rela *irelaend;
+ bfd_vma last_offset;
+ struct elf_link_hash_entry **rel_hash;
+ Elf_Internal_Shdr *input_rel_hdr, *input_rel_hdr2;
+ unsigned int next_erel;
+ bfd_boolean (*reloc_emitter)
+ (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *);
+ bfd_boolean rela_normal;
+
+ input_rel_hdr = &elf_section_data (o)->rel_hdr;
+ rela_normal = (bed->rela_normal
+ && (input_rel_hdr->sh_entsize
+ == bed->s->sizeof_rela));
+
+ /* Adjust the reloc addresses and symbol indices. */
+
+ irela = internal_relocs;
+ irelaend = irela + o->reloc_count * bed->s->int_rels_per_ext_rel;
+ rel_hash = (elf_section_data (o->output_section)->rel_hashes
+ + elf_section_data (o->output_section)->rel_count
+ + elf_section_data (o->output_section)->rel_count2);
+ last_offset = o->output_offset;
+ if (!finfo->info->relocatable)
+ last_offset += o->output_section->vma;
+ for (next_erel = 0; irela < irelaend; irela++, next_erel++)
+ {
+ unsigned long r_symndx;
+ asection *sec;
+ Elf_Internal_Sym sym;
+
+ if (next_erel == bed->s->int_rels_per_ext_rel)
+ {
+ rel_hash++;
+ next_erel = 0;
+ }
+
+ irela->r_offset = _bfd_elf_section_offset (output_bfd,
+ finfo->info, o,
+ irela->r_offset);
+ if (irela->r_offset >= (bfd_vma) -2)
+ {
+ /* This is a reloc for a deleted entry or somesuch.
+ Turn it into an R_*_NONE reloc, at the same
+ offset as the last reloc. elf_eh_frame.c and
+ elf_bfd_discard_info rely on reloc offsets
+ being ordered. */
+ irela->r_offset = last_offset;
+ irela->r_info = 0;
+ irela->r_addend = 0;
+ continue;
+ }
+
+ irela->r_offset += o->output_offset;
+
+ /* Relocs in an executable have to be virtual addresses. */
+ if (!finfo->info->relocatable)
+ irela->r_offset += o->output_section->vma;
+
+ last_offset = irela->r_offset;
+
+ r_symndx = irela->r_info >> r_sym_shift;
+ if (r_symndx == STN_UNDEF)
+ continue;
+
+ if (r_symndx >= locsymcount
+ || (elf_bad_symtab (input_bfd)
+ && finfo->sections[r_symndx] == NULL))
+ {
+ struct elf_link_hash_entry *rh;
+ unsigned long indx;
+
+ /* This is a reloc against a global symbol. We
+ have not yet output all the local symbols, so
+ we do not know the symbol index of any global
+ symbol. We set the rel_hash entry for this
+ reloc to point to the global hash table entry
+ for this symbol. The symbol index is then
+ set at the end of bfd_elf_final_link. */
+ indx = r_symndx - extsymoff;
+ rh = elf_sym_hashes (input_bfd)[indx];
+ while (rh->root.type == bfd_link_hash_indirect
+ || rh->root.type == bfd_link_hash_warning)
+ rh = (struct elf_link_hash_entry *) rh->root.u.i.link;
+
+ /* Setting the index to -2 tells
+ elf_link_output_extsym that this symbol is
+ used by a reloc. */
+ BFD_ASSERT (rh->indx < 0);
+ rh->indx = -2;
+
+ *rel_hash = rh;
+
+ continue;
+ }
+
+ /* This is a reloc against a local symbol. */
+
+ *rel_hash = NULL;
+ sym = isymbuf[r_symndx];
+ sec = finfo->sections[r_symndx];
+ if (ELF_ST_TYPE (sym.st_info) == STT_SECTION)
+ {
+ /* I suppose the backend ought to fill in the
+ section of any STT_SECTION symbol against a
+ processor specific section. */
+ r_symndx = 0;
+ if (bfd_is_abs_section (sec))
+ ;
+ else if (sec == NULL || sec->owner == NULL)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
+ else
+ {
+ asection *osec = sec->output_section;
+
+ /* If we have discarded a section, the output
+ section will be the absolute section. In
+ case of discarded link-once and discarded
+ SEC_MERGE sections, use the kept section. */
+ if (bfd_is_abs_section (osec)
+ && sec->kept_section != NULL
+ && sec->kept_section->output_section != NULL)
+ {
+ osec = sec->kept_section->output_section;
+ irela->r_addend -= osec->vma;
+ }
+
+ if (!bfd_is_abs_section (osec))
+ {
+ r_symndx = osec->target_index;
+ BFD_ASSERT (r_symndx != 0);
+ }
+ }
+
+ /* Adjust the addend according to where the
+ section winds up in the output section. */
+ if (rela_normal)
+ irela->r_addend += sec->output_offset;
+ }
+ else
+ {
+ if (finfo->indices[r_symndx] == -1)
+ {
+ unsigned long shlink;
+ const char *name;
+ asection *osec;
+
+ if (finfo->info->strip == strip_all)
+ {
+ /* You can't do ld -r -s. */
+ bfd_set_error (bfd_error_invalid_operation);
+ return FALSE;
+ }
+
+ /* This symbol was skipped earlier, but
+ since it is needed by a reloc, we
+ must output it now. */
+ shlink = symtab_hdr->sh_link;
+ name = (bfd_elf_string_from_elf_section
+ (input_bfd, shlink, sym.st_name));
+ if (name == NULL)
+ return FALSE;
+
+ osec = sec->output_section;
+ sym.st_shndx =
+ _bfd_elf_section_from_bfd_section (output_bfd,
+ osec);
+ if (sym.st_shndx == SHN_BAD)
+ return FALSE;
+
+ sym.st_value += sec->output_offset;
+ if (! finfo->info->relocatable)
+ {
+ sym.st_value += osec->vma;
+ if (ELF_ST_TYPE (sym.st_info) == STT_TLS)
+ {
+ /* STT_TLS symbols are relative to PT_TLS
+ segment base. */
+ BFD_ASSERT (elf_hash_table (finfo->info)
+ ->tls_sec != NULL);
+ sym.st_value -= (elf_hash_table (finfo->info)
+ ->tls_sec->vma);
+ }
+ }
+
+ finfo->indices[r_symndx]
+ = bfd_get_symcount (output_bfd);
+
+ if (! elf_link_output_sym (finfo, name, &sym, sec,
+ NULL))
+ return FALSE;
+ }
+
+ r_symndx = finfo->indices[r_symndx];
+ }
+
+ irela->r_info = ((bfd_vma) r_symndx << r_sym_shift
+ | (irela->r_info & r_type_mask));
+ }
+
+ /* Swap out the relocs. */
+ if (bed->elf_backend_emit_relocs
+ && !(finfo->info->relocatable
+ || finfo->info->emitrelocations))
+ reloc_emitter = bed->elf_backend_emit_relocs;
+ else
+ reloc_emitter = _bfd_elf_link_output_relocs;
+
+ if (input_rel_hdr->sh_size != 0
+ && ! (*reloc_emitter) (output_bfd, o, input_rel_hdr,
+ internal_relocs))
+ return FALSE;
+
+ input_rel_hdr2 = elf_section_data (o)->rel_hdr2;
+ if (input_rel_hdr2 && input_rel_hdr2->sh_size != 0)
+ {
+ internal_relocs += (NUM_SHDR_ENTRIES (input_rel_hdr)
+ * bed->s->int_rels_per_ext_rel);
+ if (! (*reloc_emitter) (output_bfd, o, input_rel_hdr2,
+ internal_relocs))
+ return FALSE;
+ }
+ }
+ }
+
+ /* Write out the modified section contents. */
+ if (bed->elf_backend_write_section
+ && (*bed->elf_backend_write_section) (output_bfd, o, contents))
+ {
+ /* Section written out. */
+ }
+ else switch (o->sec_info_type)
+ {
+ case ELF_INFO_TYPE_STABS:
+ if (! (_bfd_write_section_stabs
+ (output_bfd,
+ &elf_hash_table (finfo->info)->stab_info,
+ o, &elf_section_data (o)->sec_info, contents)))
+ return FALSE;
+ break;
+ case ELF_INFO_TYPE_MERGE:
+ if (! _bfd_write_merged_section (output_bfd, o,
+ elf_section_data (o)->sec_info))
+ return FALSE;
+ break;
+ case ELF_INFO_TYPE_EH_FRAME:
+ {
+ if (! _bfd_elf_write_section_eh_frame (output_bfd, finfo->info,
+ o, contents))
+ return FALSE;
+ }
+ break;
+ default:
+ {
+ if (! (o->flags & SEC_EXCLUDE)
+ && ! bfd_set_section_contents (output_bfd, o->output_section,
+ contents,
+ (file_ptr) o->output_offset,
+ o->size))
+ return FALSE;
+ }
+ break;
+ }
+ }
+
+ return TRUE;
+}
+
+/* Generate a reloc when linking an ELF file. This is a reloc
+ requested by the linker, and does come from any input file. This
+ is used to build constructor and destructor tables when linking
+ with -Ur. */
+
+static bfd_boolean
+elf_reloc_link_order (bfd *output_bfd,
+ struct bfd_link_info *info,
+ asection *output_section,
+ struct bfd_link_order *link_order)
+{
+ reloc_howto_type *howto;
+ long indx;
+ bfd_vma offset;
+ bfd_vma addend;
+ struct elf_link_hash_entry **rel_hash_ptr;
+ Elf_Internal_Shdr *rel_hdr;
+ const struct elf_backend_data *bed = get_elf_backend_data (output_bfd);
+ Elf_Internal_Rela irel[MAX_INT_RELS_PER_EXT_REL];
+ bfd_byte *erel;
+ unsigned int i;
+
+ howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc);
+ if (howto == NULL)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
+
+ addend = link_order->u.reloc.p->addend;
+
+ /* Figure out the symbol index. */
+ rel_hash_ptr = (elf_section_data (output_section)->rel_hashes
+ + elf_section_data (output_section)->rel_count
+ + elf_section_data (output_section)->rel_count2);
+ if (link_order->type == bfd_section_reloc_link_order)
+ {
+ indx = link_order->u.reloc.p->u.section->target_index;
+ BFD_ASSERT (indx != 0);
+ *rel_hash_ptr = NULL;
+ }
+ else
+ {
+ struct elf_link_hash_entry *h;
+
+ /* Treat a reloc against a defined symbol as though it were
+ actually against the section. */
+ h = ((struct elf_link_hash_entry *)
+ bfd_wrapped_link_hash_lookup (output_bfd, info,
+ link_order->u.reloc.p->u.name,
+ FALSE, FALSE, TRUE));
+ if (h != NULL
+ && (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak))
+ {
+ asection *section;
+
+ section = h->root.u.def.section;
+ indx = section->output_section->target_index;
+ *rel_hash_ptr = NULL;
+ /* It seems that we ought to add the symbol value to the
+ addend here, but in practice it has already been added
+ because it was passed to constructor_callback. */
+ addend += section->output_section->vma + section->output_offset;
+ }
+ else if (h != NULL)
+ {
+ /* Setting the index to -2 tells elf_link_output_extsym that
+ this symbol is used by a reloc. */
+ h->indx = -2;
+ *rel_hash_ptr = h;
+ indx = 0;
+ }
+ else
+ {
+ if (! ((*info->callbacks->unattached_reloc)
+ (info, link_order->u.reloc.p->u.name, NULL, NULL, 0)))
+ return FALSE;
+ indx = 0;
+ }
+ }
+
+ /* If this is an inplace reloc, we must write the addend into the
+ object file. */
+ if (howto->partial_inplace && addend != 0)
+ {
+ bfd_size_type size;
+ bfd_reloc_status_type rstat;
+ bfd_byte *buf;
+ bfd_boolean ok;
+ const char *sym_name;
+
+ size = bfd_get_reloc_size (howto);
+ buf = bfd_zmalloc (size);
+ if (buf == NULL)
+ return FALSE;
+ rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf);
+ switch (rstat)
+ {
+ case bfd_reloc_ok:
+ break;
+
+ default:
+ case bfd_reloc_outofrange:
+ abort ();
+
+ case bfd_reloc_overflow:
+ if (link_order->type == bfd_section_reloc_link_order)
+ sym_name = bfd_section_name (output_bfd,
+ link_order->u.reloc.p->u.section);
+ else
+ sym_name = link_order->u.reloc.p->u.name;
+ if (! ((*info->callbacks->reloc_overflow)
+ (info, NULL, sym_name, howto->name, addend, NULL,
+ NULL, (bfd_vma) 0)))
+ {
+ free (buf);
+ return FALSE;
+ }
+ break;
+ }
+ ok = bfd_set_section_contents (output_bfd, output_section, buf,
+ link_order->offset, size);
+ free (buf);
+ if (! ok)
+ return FALSE;
+ }
+
+ /* The address of a reloc is relative to the section in a
+ relocatable file, and is a virtual address in an executable
+ file. */
+ offset = link_order->offset;
+ if (! info->relocatable)
+ offset += output_section->vma;
+
+ for (i = 0; i < bed->s->int_rels_per_ext_rel; i++)
+ {
+ irel[i].r_offset = offset;
+ irel[i].r_info = 0;
+ irel[i].r_addend = 0;
+ }
+ if (bed->s->arch_size == 32)
+ irel[0].r_info = ELF32_R_INFO (indx, howto->type);
+ else
+ irel[0].r_info = ELF64_R_INFO (indx, howto->type);
+
+ rel_hdr = &elf_section_data (output_section)->rel_hdr;
+ erel = rel_hdr->contents;
+ if (rel_hdr->sh_type == SHT_REL)
+ {
+ erel += (elf_section_data (output_section)->rel_count
+ * bed->s->sizeof_rel);
+ (*bed->s->swap_reloc_out) (output_bfd, irel, erel);
+ }
+ else
+ {
+ irel[0].r_addend = addend;
+ erel += (elf_section_data (output_section)->rel_count
+ * bed->s->sizeof_rela);
+ (*bed->s->swap_reloca_out) (output_bfd, irel, erel);
+ }
+
+ ++elf_section_data (output_section)->rel_count;
+
+ return TRUE;
+}
+
+
+/* Get the output vma of the section pointed to by the sh_link field. */
+
+static bfd_vma
+elf_get_linked_section_vma (struct bfd_link_order *p)
+{
+ Elf_Internal_Shdr **elf_shdrp;
+ asection *s;
+ int elfsec;
+
+ s = p->u.indirect.section;
+ elf_shdrp = elf_elfsections (s->owner);
+ elfsec = _bfd_elf_section_from_bfd_section (s->owner, s);
+ elfsec = elf_shdrp[elfsec]->sh_link;
+ /* PR 290:
+ The Intel C compiler generates SHT_IA_64_UNWIND with
+ SHF_LINK_ORDER. But it doesn't set theh sh_link or
+ sh_info fields. Hence we could get the situation
+ where elfsec is 0. */
+ if (elfsec == 0)
+ {
+ const struct elf_backend_data *bed
+ = get_elf_backend_data (s->owner);
+ if (bed->link_order_error_handler)
+ bed->link_order_error_handler
+ (_("%B: warning: sh_link not set for section `%A'"), s->owner, s);
+ return 0;
+ }
+ else
+ {
+ s = elf_shdrp[elfsec]->bfd_section;
+ return s->output_section->vma + s->output_offset;
+ }
+}
+
+
+/* Compare two sections based on the locations of the sections they are
+ linked to. Used by elf_fixup_link_order. */
+
+static int
+compare_link_order (const void * a, const void * b)
+{
+ bfd_vma apos;
+ bfd_vma bpos;
+
+ apos = elf_get_linked_section_vma (*(struct bfd_link_order **)a);
+ bpos = elf_get_linked_section_vma (*(struct bfd_link_order **)b);
+ if (apos < bpos)
+ return -1;
+ return apos > bpos;
+}
+
+
+/* Looks for sections with SHF_LINK_ORDER set. Rearranges them into the same
+ order as their linked sections. Returns false if this could not be done
+ because an output section includes both ordered and unordered
+ sections. Ideally we'd do this in the linker proper. */
+
+static bfd_boolean
+elf_fixup_link_order (bfd *abfd, asection *o)
+{
+ int seen_linkorder;
+ int seen_other;
+ int n;
+ struct bfd_link_order *p;
+ bfd *sub;
+ const struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ int elfsec;
+ struct bfd_link_order **sections;
+ asection *s;
+ bfd_vma offset;
+
+ seen_other = 0;
+ seen_linkorder = 0;
+ for (p = o->link_order_head; p != NULL; p = p->next)
+ {
+ if (p->type == bfd_indirect_link_order
+ && (bfd_get_flavour ((sub = p->u.indirect.section->owner))
+ == bfd_target_elf_flavour)
+ && elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass)
+ {
+ s = p->u.indirect.section;
+ elfsec = _bfd_elf_section_from_bfd_section (sub, s);
+ if (elfsec != -1
+ && elf_elfsections (sub)[elfsec]->sh_flags & SHF_LINK_ORDER)
+ seen_linkorder++;
+ else
+ seen_other++;
+ }
+ else
+ seen_other++;
+ }
+
+ if (!seen_linkorder)
+ return TRUE;
+
+ if (seen_other && seen_linkorder)
+ {
+ (*_bfd_error_handler) (_("%A has both ordered and unordered sections"),
+ o);
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
+
+ sections = (struct bfd_link_order **)
+ xmalloc (seen_linkorder * sizeof (struct bfd_link_order *));
+ seen_linkorder = 0;
+
+ for (p = o->link_order_head; p != NULL; p = p->next)
+ {
+ sections[seen_linkorder++] = p;
+ }
+ /* Sort the input sections in the order of their linked section. */
+ qsort (sections, seen_linkorder, sizeof (struct bfd_link_order *),
+ compare_link_order);
+
+ /* Change the offsets of the sections. */
+ offset = 0;
+ for (n = 0; n < seen_linkorder; n++)
+ {
+ s = sections[n]->u.indirect.section;
+ offset &= ~(bfd_vma)((1 << s->alignment_power) - 1);
+ s->output_offset = offset;
+ sections[n]->offset = offset;
+ offset += sections[n]->size;
+ }
+
+ return TRUE;
+}
+
+
+/* Do the final step of an ELF link. */
+
+bfd_boolean
+bfd_elf_final_link (bfd *abfd, struct bfd_link_info *info)
+{
+ bfd_boolean dynamic;
+ bfd_boolean emit_relocs;
+ bfd *dynobj;
+ struct elf_final_link_info finfo;
+ register asection *o;
+ register struct bfd_link_order *p;
+ register bfd *sub;
+ bfd_size_type max_contents_size;
+ bfd_size_type max_external_reloc_size;
+ bfd_size_type max_internal_reloc_count;
+ bfd_size_type max_sym_count;
+ bfd_size_type max_sym_shndx_count;
+ file_ptr off;
+ Elf_Internal_Sym elfsym;
+ unsigned int i;
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_Internal_Shdr *symtab_shndx_hdr;
+ Elf_Internal_Shdr *symstrtab_hdr;
+ const struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ struct elf_outext_info eoinfo;
+ bfd_boolean merged;
+ size_t relativecount = 0;
+ asection *reldyn = 0;
+ bfd_size_type amt;
+
+ if (! is_elf_hash_table (info->hash))
+ return FALSE;
+
+ if (info->shared)
+ abfd->flags |= DYNAMIC;
+
+ dynamic = elf_hash_table (info)->dynamic_sections_created;
+ dynobj = elf_hash_table (info)->dynobj;
+
+ emit_relocs = (info->relocatable
+ || info->emitrelocations
+ || bed->elf_backend_emit_relocs);
+
+ finfo.info = info;
+ finfo.output_bfd = abfd;
+ finfo.symstrtab = _bfd_elf_stringtab_init ();
+ if (finfo.symstrtab == NULL)
+ return FALSE;
+
+ if (! dynamic)
+ {
+ finfo.dynsym_sec = NULL;
+ finfo.hash_sec = NULL;
+ finfo.symver_sec = NULL;
+ }
+ else
+ {
+ finfo.dynsym_sec = bfd_get_section_by_name (dynobj, ".dynsym");
+ finfo.hash_sec = bfd_get_section_by_name (dynobj, ".hash");
+ BFD_ASSERT (finfo.dynsym_sec != NULL && finfo.hash_sec != NULL);
+ finfo.symver_sec = bfd_get_section_by_name (dynobj, ".gnu.version");
+ /* Note that it is OK if symver_sec is NULL. */
+ }
+
+ finfo.contents = NULL;
+ finfo.external_relocs = NULL;
+ finfo.internal_relocs = NULL;
+ finfo.external_syms = NULL;
+ finfo.locsym_shndx = NULL;
+ finfo.internal_syms = NULL;
+ finfo.indices = NULL;
+ finfo.sections = NULL;
+ finfo.symbuf = NULL;
+ finfo.symshndxbuf = NULL;
+ finfo.symbuf_count = 0;
+ finfo.shndxbuf_size = 0;
+
+ /* Count up the number of relocations we will output for each output
+ section, so that we know the sizes of the reloc sections. We
+ also figure out some maximum sizes. */
+ max_contents_size = 0;
+ max_external_reloc_size = 0;
+ max_internal_reloc_count = 0;
+ max_sym_count = 0;
+ max_sym_shndx_count = 0;
+ merged = FALSE;
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ struct bfd_elf_section_data *esdo = elf_section_data (o);
+ o->reloc_count = 0;
+
+ for (p = o->link_order_head; p != NULL; p = p->next)
+ {
+ unsigned int reloc_count = 0;
+ struct bfd_elf_section_data *esdi = NULL;
+ unsigned int *rel_count1;
+
+ if (p->type == bfd_section_reloc_link_order
+ || p->type == bfd_symbol_reloc_link_order)
+ reloc_count = 1;
+ else if (p->type == bfd_indirect_link_order)
+ {
+ asection *sec;
+
+ sec = p->u.indirect.section;
+ esdi = elf_section_data (sec);
+
+ /* Mark all sections which are to be included in the
+ link. This will normally be every section. We need
+ to do this so that we can identify any sections which
+ the linker has decided to not include. */
+ sec->linker_mark = TRUE;
+
+ if (sec->flags & SEC_MERGE)
+ merged = TRUE;
+
+ if (info->relocatable || info->emitrelocations)
+ reloc_count = sec->reloc_count;
+ else if (bed->elf_backend_count_relocs)
+ {
+ Elf_Internal_Rela * relocs;
+
+ relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL,
+ info->keep_memory);
+
+ reloc_count = (*bed->elf_backend_count_relocs) (sec, relocs);
+
+ if (elf_section_data (o)->relocs != relocs)
+ free (relocs);
+ }
+
+ if (sec->rawsize > max_contents_size)
+ max_contents_size = sec->rawsize;
+ if (sec->size > max_contents_size)
+ max_contents_size = sec->size;
+
+ /* We are interested in just local symbols, not all
+ symbols. */
+ if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour
+ && (sec->owner->flags & DYNAMIC) == 0)
+ {
+ size_t sym_count;
+
+ if (elf_bad_symtab (sec->owner))
+ sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size
+ / bed->s->sizeof_sym);
+ else
+ sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info;
+
+ if (sym_count > max_sym_count)
+ max_sym_count = sym_count;
+
+ if (sym_count > max_sym_shndx_count
+ && elf_symtab_shndx (sec->owner) != 0)
+ max_sym_shndx_count = sym_count;
+
+ if ((sec->flags & SEC_RELOC) != 0)
+ {
+ size_t ext_size;
+
+ ext_size = elf_section_data (sec)->rel_hdr.sh_size;
+ if (ext_size > max_external_reloc_size)
+ max_external_reloc_size = ext_size;
+ if (sec->reloc_count > max_internal_reloc_count)
+ max_internal_reloc_count = sec->reloc_count;
+ }
+ }
+ }
+
+ if (reloc_count == 0)
+ continue;
+
+ o->reloc_count += reloc_count;
+
+ /* MIPS may have a mix of REL and RELA relocs on sections.
+ To support this curious ABI we keep reloc counts in
+ elf_section_data too. We must be careful to add the
+ relocations from the input section to the right output
+ count. FIXME: Get rid of one count. We have
+ o->reloc_count == esdo->rel_count + esdo->rel_count2. */
+ rel_count1 = &esdo->rel_count;
+ if (esdi != NULL)
+ {
+ bfd_boolean same_size;
+ bfd_size_type entsize1;
+
+ entsize1 = esdi->rel_hdr.sh_entsize;
+ BFD_ASSERT (entsize1 == bed->s->sizeof_rel
+ || entsize1 == bed->s->sizeof_rela);
+ same_size = !o->use_rela_p == (entsize1 == bed->s->sizeof_rel);
+
+ if (!same_size)
+ rel_count1 = &esdo->rel_count2;
+
+ if (esdi->rel_hdr2 != NULL)
+ {
+ bfd_size_type entsize2 = esdi->rel_hdr2->sh_entsize;
+ unsigned int alt_count;
+ unsigned int *rel_count2;
+
+ BFD_ASSERT (entsize2 != entsize1
+ && (entsize2 == bed->s->sizeof_rel
+ || entsize2 == bed->s->sizeof_rela));
+
+ rel_count2 = &esdo->rel_count2;
+ if (!same_size)
+ rel_count2 = &esdo->rel_count;
+
+ /* The following is probably too simplistic if the
+ backend counts output relocs unusually. */
+ BFD_ASSERT (bed->elf_backend_count_relocs == NULL);
+ alt_count = NUM_SHDR_ENTRIES (esdi->rel_hdr2);
+ *rel_count2 += alt_count;
+ reloc_count -= alt_count;
+ }
+ }
+ *rel_count1 += reloc_count;
+ }
+
+ if (o->reloc_count > 0)
+ o->flags |= SEC_RELOC;
+ else
+ {
+ /* Explicitly clear the SEC_RELOC flag. The linker tends to
+ set it (this is probably a bug) and if it is set
+ assign_section_numbers will create a reloc section. */
+ o->flags &=~ SEC_RELOC;
+ }
+
+ /* If the SEC_ALLOC flag is not set, force the section VMA to
+ zero. This is done in elf_fake_sections as well, but forcing
+ the VMA to 0 here will ensure that relocs against these
+ sections are handled correctly. */
+ if ((o->flags & SEC_ALLOC) == 0
+ && ! o->user_set_vma)
+ o->vma = 0;
+ }
+
+ if (! info->relocatable && merged)
+ elf_link_hash_traverse (elf_hash_table (info),
+ _bfd_elf_link_sec_merge_syms, abfd);
+
+ /* Figure out the file positions for everything but the symbol table
+ and the relocs. We set symcount to force assign_section_numbers
+ to create a symbol table. */
+ bfd_get_symcount (abfd) = info->strip == strip_all ? 0 : 1;
+ BFD_ASSERT (! abfd->output_has_begun);
+ if (! _bfd_elf_compute_section_file_positions (abfd, info))
+ goto error_return;
+
+ /* Set sizes, and assign file positions for reloc sections. */
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ if ((o->flags & SEC_RELOC) != 0)
+ {
+ if (!(_bfd_elf_link_size_reloc_section
+ (abfd, &elf_section_data (o)->rel_hdr, o)))
+ goto error_return;
+
+ if (elf_section_data (o)->rel_hdr2
+ && !(_bfd_elf_link_size_reloc_section
+ (abfd, elf_section_data (o)->rel_hdr2, o)))
+ goto error_return;
+ }
+
+ /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them
+ to count upwards while actually outputting the relocations. */
+ elf_section_data (o)->rel_count = 0;
+ elf_section_data (o)->rel_count2 = 0;
+ }
+
+ _bfd_elf_assign_file_positions_for_relocs (abfd);
+
+ /* We have now assigned file positions for all the sections except
+ .symtab and .strtab. We start the .symtab section at the current
+ file position, and write directly to it. We build the .strtab
+ section in memory. */
+ bfd_get_symcount (abfd) = 0;
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ /* sh_name is set in prep_headers. */
+ symtab_hdr->sh_type = SHT_SYMTAB;
+ /* sh_flags, sh_addr and sh_size all start off zero. */
+ symtab_hdr->sh_entsize = bed->s->sizeof_sym;
+ /* sh_link is set in assign_section_numbers. */
+ /* sh_info is set below. */
+ /* sh_offset is set just below. */
+ symtab_hdr->sh_addralign = 1 << bed->s->log_file_align;
+
+ off = elf_tdata (abfd)->next_file_pos;
+ off = _bfd_elf_assign_file_position_for_section (symtab_hdr, off, TRUE);
+
+ /* Note that at this point elf_tdata (abfd)->next_file_pos is
+ incorrect. We do not yet know the size of the .symtab section.
+ We correct next_file_pos below, after we do know the size. */
+
+ /* Allocate a buffer to hold swapped out symbols. This is to avoid
+ continuously seeking to the right position in the file. */
+ if (! info->keep_memory || max_sym_count < 20)
+ finfo.symbuf_size = 20;
+ else
+ finfo.symbuf_size = max_sym_count;
+ amt = finfo.symbuf_size;
+ amt *= bed->s->sizeof_sym;
+ finfo.symbuf = bfd_malloc (amt);
+ if (finfo.symbuf == NULL)
+ goto error_return;
+ if (elf_numsections (abfd) > SHN_LORESERVE)
+ {
+ /* Wild guess at number of output symbols. realloc'd as needed. */
+ amt = 2 * max_sym_count + elf_numsections (abfd) + 1000;
+ finfo.shndxbuf_size = amt;
+ amt *= sizeof (Elf_External_Sym_Shndx);
+ finfo.symshndxbuf = bfd_zmalloc (amt);
+ if (finfo.symshndxbuf == NULL)
+ goto error_return;
+ }
+
+ /* Start writing out the symbol table. The first symbol is always a
+ dummy symbol. */
+ if (info->strip != strip_all
+ || emit_relocs)
+ {
+ elfsym.st_value = 0;
+ elfsym.st_size = 0;
+ elfsym.st_info = 0;
+ elfsym.st_other = 0;
+ elfsym.st_shndx = SHN_UNDEF;
+ if (! elf_link_output_sym (&finfo, NULL, &elfsym, bfd_und_section_ptr,
+ NULL))
+ goto error_return;
+ }
+
+ /* Output a symbol for each section. We output these even if we are
+ discarding local symbols, since they are used for relocs. These
+ symbols have no names. We store the index of each one in the
+ index field of the section, so that we can find it again when
+ outputting relocs. */
+ if (info->strip != strip_all
+ || emit_relocs)
+ {
+ elfsym.st_size = 0;
+ elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
+ elfsym.st_other = 0;
+ for (i = 1; i < elf_numsections (abfd); i++)
+ {
+ o = bfd_section_from_elf_index (abfd, i);
+ if (o != NULL)
+ o->target_index = bfd_get_symcount (abfd);
+ elfsym.st_shndx = i;
+ if (info->relocatable || o == NULL)
+ elfsym.st_value = 0;
+ else
+ elfsym.st_value = o->vma;
+ if (! elf_link_output_sym (&finfo, NULL, &elfsym, o, NULL))
+ goto error_return;
+ if (i == SHN_LORESERVE - 1)
+ i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
+ }
+ }
+
+ /* Allocate some memory to hold information read in from the input
+ files. */
+ if (max_contents_size != 0)
+ {
+ finfo.contents = bfd_malloc (max_contents_size);
+ if (finfo.contents == NULL)
+ goto error_return;
+ }
+
+ if (max_external_reloc_size != 0)
+ {
+ finfo.external_relocs = bfd_malloc (max_external_reloc_size);
+ if (finfo.external_relocs == NULL)
+ goto error_return;
+ }
+
+ if (max_internal_reloc_count != 0)
+ {
+ amt = max_internal_reloc_count * bed->s->int_rels_per_ext_rel;
+ amt *= sizeof (Elf_Internal_Rela);
+ finfo.internal_relocs = bfd_malloc (amt);
+ if (finfo.internal_relocs == NULL)
+ goto error_return;
+ }
+
+ if (max_sym_count != 0)
+ {
+ amt = max_sym_count * bed->s->sizeof_sym;
+ finfo.external_syms = bfd_malloc (amt);
+ if (finfo.external_syms == NULL)
+ goto error_return;
+
+ amt = max_sym_count * sizeof (Elf_Internal_Sym);
+ finfo.internal_syms = bfd_malloc (amt);
+ if (finfo.internal_syms == NULL)
+ goto error_return;
+
+ amt = max_sym_count * sizeof (long);
+ finfo.indices = bfd_malloc (amt);
+ if (finfo.indices == NULL)
+ goto error_return;
+
+ amt = max_sym_count * sizeof (asection *);
+ finfo.sections = bfd_malloc (amt);
+ if (finfo.sections == NULL)
+ goto error_return;
+ }
+
+ if (max_sym_shndx_count != 0)
+ {
+ amt = max_sym_shndx_count * sizeof (Elf_External_Sym_Shndx);
+ finfo.locsym_shndx = bfd_malloc (amt);
+ if (finfo.locsym_shndx == NULL)
+ goto error_return;
+ }
+
+ if (elf_hash_table (info)->tls_sec)
+ {
+ bfd_vma base, end = 0;
+ asection *sec;
+
+ for (sec = elf_hash_table (info)->tls_sec;
+ sec && (sec->flags & SEC_THREAD_LOCAL);
+ sec = sec->next)
+ {
+ bfd_vma size = sec->size;
+
+ if (size == 0 && (sec->flags & SEC_HAS_CONTENTS) == 0)
+ {
+ struct bfd_link_order *o;
+
+ for (o = sec->link_order_head; o != NULL; o = o->next)
+ if (size < o->offset + o->size)
+ size = o->offset + o->size;
+ }
+ end = sec->vma + size;
+ }
+ base = elf_hash_table (info)->tls_sec->vma;
+ end = align_power (end, elf_hash_table (info)->tls_sec->alignment_power);
+ elf_hash_table (info)->tls_size = end - base;
+ }
+
+ /* Reorder SHF_LINK_ORDER sections. */
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ if (!elf_fixup_link_order (abfd, o))
+ return FALSE;
+ }
+
+ /* Since ELF permits relocations to be against local symbols, we
+ must have the local symbols available when we do the relocations.
+ Since we would rather only read the local symbols once, and we
+ would rather not keep them in memory, we handle all the
+ relocations for a single input file at the same time.
+
+ Unfortunately, there is no way to know the total number of local
+ symbols until we have seen all of them, and the local symbol
+ indices precede the global symbol indices. This means that when
+ we are generating relocatable output, and we see a reloc against
+ a global symbol, we can not know the symbol index until we have
+ finished examining all the local symbols to see which ones we are
+ going to output. To deal with this, we keep the relocations in
+ memory, and don't output them until the end of the link. This is
+ an unfortunate waste of memory, but I don't see a good way around
+ it. Fortunately, it only happens when performing a relocatable
+ link, which is not the common case. FIXME: If keep_memory is set
+ we could write the relocs out and then read them again; I don't
+ know how bad the memory loss will be. */
+
+ for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
+ sub->output_has_begun = FALSE;
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ for (p = o->link_order_head; p != NULL; p = p->next)
+ {
+ if (p->type == bfd_indirect_link_order
+ && (bfd_get_flavour ((sub = p->u.indirect.section->owner))
+ == bfd_target_elf_flavour)
+ && elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass)
+ {
+ if (! sub->output_has_begun)
+ {
+ if (! elf_link_input_bfd (&finfo, sub))
+ goto error_return;
+ sub->output_has_begun = TRUE;
+ }
+ }
+ else if (p->type == bfd_section_reloc_link_order
+ || p->type == bfd_symbol_reloc_link_order)
+ {
+ if (! elf_reloc_link_order (abfd, info, o, p))
+ goto error_return;
+ }
+ else
+ {
+ if (! _bfd_default_link_order (abfd, info, o, p))
+ goto error_return;
+ }
+ }
+ }
+
+ /* Output any global symbols that got converted to local in a
+ version script or due to symbol visibility. We do this in a
+ separate step since ELF requires all local symbols to appear
+ prior to any global symbols. FIXME: We should only do this if
+ some global symbols were, in fact, converted to become local.
+ FIXME: Will this work correctly with the Irix 5 linker? */
+ eoinfo.failed = FALSE;
+ eoinfo.finfo = &finfo;
+ eoinfo.localsyms = TRUE;
+ elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym,
+ &eoinfo);
+ if (eoinfo.failed)
+ return FALSE;
+
+ /* That wrote out all the local symbols. Finish up the symbol table
+ with the global symbols. Even if we want to strip everything we
+ can, we still need to deal with those global symbols that got
+ converted to local in a version script. */
+
+ /* The sh_info field records the index of the first non local symbol. */
+ symtab_hdr->sh_info = bfd_get_symcount (abfd);
+
+ if (dynamic
+ && finfo.dynsym_sec->output_section != bfd_abs_section_ptr)
+ {
+ Elf_Internal_Sym sym;
+ bfd_byte *dynsym = finfo.dynsym_sec->contents;
+ long last_local = 0;
+
+ /* Write out the section symbols for the output sections. */
+ if (info->shared || elf_hash_table (info)->is_relocatable_executable)
+ {
+ asection *s;
+
+ sym.st_size = 0;
+ sym.st_name = 0;
+ sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
+ sym.st_other = 0;
+
+ for (s = abfd->sections; s != NULL; s = s->next)
+ {
+ int indx;
+ bfd_byte *dest;
+ long dynindx;
+
+ dynindx = elf_section_data (s)->dynindx;
+ if (dynindx <= 0)
+ continue;
+ indx = elf_section_data (s)->this_idx;
+ BFD_ASSERT (indx > 0);
+ sym.st_shndx = indx;
+ sym.st_value = s->vma;
+ dest = dynsym + dynindx * bed->s->sizeof_sym;
+ if (last_local < dynindx)
+ last_local = dynindx;
+ bed->s->swap_symbol_out (abfd, &sym, dest, 0);
+ }
+ }
+
+ /* Write out the local dynsyms. */
+ if (elf_hash_table (info)->dynlocal)
+ {
+ struct elf_link_local_dynamic_entry *e;
+ for (e = elf_hash_table (info)->dynlocal; e ; e = e->next)
+ {
+ asection *s;
+ bfd_byte *dest;
+
+ sym.st_size = e->isym.st_size;
+ sym.st_other = e->isym.st_other;
+
+ /* Copy the internal symbol as is.
+ Note that we saved a word of storage and overwrote
+ the original st_name with the dynstr_index. */
+ sym = e->isym;
+
+ if (e->isym.st_shndx != SHN_UNDEF
+ && (e->isym.st_shndx < SHN_LORESERVE
+ || e->isym.st_shndx > SHN_HIRESERVE))
+ {
+ s = bfd_section_from_elf_index (e->input_bfd,
+ e->isym.st_shndx);
+
+ sym.st_shndx =
+ elf_section_data (s->output_section)->this_idx;
+ sym.st_value = (s->output_section->vma
+ + s->output_offset
+ + e->isym.st_value);
+ }
+
+ if (last_local < e->dynindx)
+ last_local = e->dynindx;
+
+ dest = dynsym + e->dynindx * bed->s->sizeof_sym;
+ bed->s->swap_symbol_out (abfd, &sym, dest, 0);
+ }
+ }
+
+ elf_section_data (finfo.dynsym_sec->output_section)->this_hdr.sh_info =
+ last_local + 1;
+ }
+
+ /* We get the global symbols from the hash table. */
+ eoinfo.failed = FALSE;
+ eoinfo.localsyms = FALSE;
+ eoinfo.finfo = &finfo;
+ elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym,
+ &eoinfo);
+ if (eoinfo.failed)
+ return FALSE;
+
+ /* If backend needs to output some symbols not present in the hash
+ table, do it now. */
+ if (bed->elf_backend_output_arch_syms)
+ {
+ typedef bfd_boolean (*out_sym_func)
+ (void *, const char *, Elf_Internal_Sym *, asection *,
+ struct elf_link_hash_entry *);
+
+ if (! ((*bed->elf_backend_output_arch_syms)
+ (abfd, info, &finfo, (out_sym_func) elf_link_output_sym)))
+ return FALSE;
+ }
+
+ /* Flush all symbols to the file. */
+ if (! elf_link_flush_output_syms (&finfo, bed))
+ return FALSE;
+
+ /* Now we know the size of the symtab section. */
+ off += symtab_hdr->sh_size;
+
+ symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
+ if (symtab_shndx_hdr->sh_name != 0)
+ {
+ symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
+ symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
+ symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
+ amt = bfd_get_symcount (abfd) * sizeof (Elf_External_Sym_Shndx);
+ symtab_shndx_hdr->sh_size = amt;
+
+ off = _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr,
+ off, TRUE);
+
+ if (bfd_seek (abfd, symtab_shndx_hdr->sh_offset, SEEK_SET) != 0
+ || (bfd_bwrite (finfo.symshndxbuf, amt, abfd) != amt))
+ return FALSE;
+ }
+
+
+ /* Finish up and write out the symbol string table (.strtab)
+ section. */
+ symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
+ /* sh_name was set in prep_headers. */
+ symstrtab_hdr->sh_type = SHT_STRTAB;
+ symstrtab_hdr->sh_flags = 0;
+ symstrtab_hdr->sh_addr = 0;
+ symstrtab_hdr->sh_size = _bfd_stringtab_size (finfo.symstrtab);
+ symstrtab_hdr->sh_entsize = 0;
+ symstrtab_hdr->sh_link = 0;
+ symstrtab_hdr->sh_info = 0;
+ /* sh_offset is set just below. */
+ symstrtab_hdr->sh_addralign = 1;
+
+ off = _bfd_elf_assign_file_position_for_section (symstrtab_hdr, off, TRUE);
+ elf_tdata (abfd)->next_file_pos = off;
+
+ if (bfd_get_symcount (abfd) > 0)
+ {
+ if (bfd_seek (abfd, symstrtab_hdr->sh_offset, SEEK_SET) != 0
+ || ! _bfd_stringtab_emit (abfd, finfo.symstrtab))
+ return FALSE;
+ }
+
+ /* Adjust the relocs to have the correct symbol indices. */
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ if ((o->flags & SEC_RELOC) == 0)
+ continue;
+
+ elf_link_adjust_relocs (abfd, &elf_section_data (o)->rel_hdr,
+ elf_section_data (o)->rel_count,
+ elf_section_data (o)->rel_hashes);
+ if (elf_section_data (o)->rel_hdr2 != NULL)
+ elf_link_adjust_relocs (abfd, elf_section_data (o)->rel_hdr2,
+ elf_section_data (o)->rel_count2,
+ (elf_section_data (o)->rel_hashes
+ + elf_section_data (o)->rel_count));
+
+ /* Set the reloc_count field to 0 to prevent write_relocs from
+ trying to swap the relocs out itself. */
+ o->reloc_count = 0;
+ }
+
+ if (dynamic && info->combreloc && dynobj != NULL)
+ relativecount = elf_link_sort_relocs (abfd, info, &reldyn);
+
+ /* If we are linking against a dynamic object, or generating a
+ shared library, finish up the dynamic linking information. */
+ if (dynamic)
+ {
+ bfd_byte *dyncon, *dynconend;
+
+ /* Fix up .dynamic entries. */
+ o = bfd_get_section_by_name (dynobj, ".dynamic");
+ BFD_ASSERT (o != NULL);
+
+ dyncon = o->contents;
+ dynconend = o->contents + o->size;
+ for (; dyncon < dynconend; dyncon += bed->s->sizeof_dyn)
+ {
+ Elf_Internal_Dyn dyn;
+ const char *name;
+ unsigned int type;
+
+ bed->s->swap_dyn_in (dynobj, dyncon, &dyn);
+
+ switch (dyn.d_tag)
+ {
+ default:
+ continue;
+ case DT_NULL:
+ if (relativecount > 0 && dyncon + bed->s->sizeof_dyn < dynconend)
+ {
+ switch (elf_section_data (reldyn)->this_hdr.sh_type)
+ {
+ case SHT_REL: dyn.d_tag = DT_RELCOUNT; break;
+ case SHT_RELA: dyn.d_tag = DT_RELACOUNT; break;
+ default: continue;
+ }
+ dyn.d_un.d_val = relativecount;
+ relativecount = 0;
+ break;
+ }
+ continue;
+
+ case DT_INIT:
+ name = info->init_function;
+ goto get_sym;
+ case DT_FINI:
+ name = info->fini_function;
+ get_sym:
+ {
+ struct elf_link_hash_entry *h;
+
+ h = elf_link_hash_lookup (elf_hash_table (info), name,
+ FALSE, FALSE, TRUE);
+ if (h != NULL
+ && (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak))
+ {
+ dyn.d_un.d_val = h->root.u.def.value;
+ o = h->root.u.def.section;
+ if (o->output_section != NULL)
+ dyn.d_un.d_val += (o->output_section->vma
+ + o->output_offset);
+ else
+ {
+ /* The symbol is imported from another shared
+ library and does not apply to this one. */
+ dyn.d_un.d_val = 0;
+ }
+ break;
+ }
+ }
+ continue;
+
+ case DT_PREINIT_ARRAYSZ:
+ name = ".preinit_array";
+ goto get_size;
+ case DT_INIT_ARRAYSZ:
+ name = ".init_array";
+ goto get_size;
+ case DT_FINI_ARRAYSZ:
+ name = ".fini_array";
+ get_size:
+ o = bfd_get_section_by_name (abfd, name);
+ if (o == NULL)
+ {
+ (*_bfd_error_handler)
+ (_("%B: could not find output section %s"), abfd, name);
+ goto error_return;
+ }
+ if (o->size == 0)
+ (*_bfd_error_handler)
+ (_("warning: %s section has zero size"), name);
+ dyn.d_un.d_val = o->size;
+ break;
+
+ case DT_PREINIT_ARRAY:
+ name = ".preinit_array";
+ goto get_vma;
+ case DT_INIT_ARRAY:
+ name = ".init_array";
+ goto get_vma;
+ case DT_FINI_ARRAY:
+ name = ".fini_array";
+ goto get_vma;
+
+ case DT_HASH:
+ name = ".hash";
+ goto get_vma;
+ case DT_STRTAB:
+ name = ".dynstr";
+ goto get_vma;
+ case DT_SYMTAB:
+ name = ".dynsym";
+ goto get_vma;
+ case DT_VERDEF:
+ name = ".gnu.version_d";
+ goto get_vma;
+ case DT_VERNEED:
+ name = ".gnu.version_r";
+ goto get_vma;
+ case DT_VERSYM:
+ name = ".gnu.version";
+ get_vma:
+ o = bfd_get_section_by_name (abfd, name);
+ if (o == NULL)
+ {
+ (*_bfd_error_handler)
+ (_("%B: could not find output section %s"), abfd, name);
+ goto error_return;
+ }
+ dyn.d_un.d_ptr = o->vma;
+ break;
+
+ case DT_REL:
+ case DT_RELA:
+ case DT_RELSZ:
+ case DT_RELASZ:
+ if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
+ type = SHT_REL;
+ else
+ type = SHT_RELA;
+ dyn.d_un.d_val = 0;
+ for (i = 1; i < elf_numsections (abfd); i++)
+ {
+ Elf_Internal_Shdr *hdr;
+
+ hdr = elf_elfsections (abfd)[i];
+ if (hdr->sh_type == type
+ && (hdr->sh_flags & SHF_ALLOC) != 0)
+ {
+ if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ)
+ dyn.d_un.d_val += hdr->sh_size;
+ else
+ {
+ if (dyn.d_un.d_val == 0
+ || hdr->sh_addr < dyn.d_un.d_val)
+ dyn.d_un.d_val = hdr->sh_addr;
+ }
+ }
+ }
+ break;
+ }
+ bed->s->swap_dyn_out (dynobj, &dyn, dyncon);
+ }
+ }
+
+ /* If we have created any dynamic sections, then output them. */
+ if (dynobj != NULL)
+ {
+ if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info))
+ goto error_return;
+
+ for (o = dynobj->sections; o != NULL; o = o->next)
+ {
+ if ((o->flags & SEC_HAS_CONTENTS) == 0
+ || o->size == 0
+ || o->output_section == bfd_abs_section_ptr)
+ continue;
+ if ((o->flags & SEC_LINKER_CREATED) == 0)
+ {
+ /* At this point, we are only interested in sections
+ created by _bfd_elf_link_create_dynamic_sections. */
+ continue;
+ }
+ if (elf_hash_table (info)->stab_info.stabstr == o)
+ continue;
+ if (elf_hash_table (info)->eh_info.hdr_sec == o)
+ continue;
+ if ((elf_section_data (o->output_section)->this_hdr.sh_type
+ != SHT_STRTAB)
+ || strcmp (bfd_get_section_name (abfd, o), ".dynstr") != 0)
+ {
+ if (! bfd_set_section_contents (abfd, o->output_section,
+ o->contents,
+ (file_ptr) o->output_offset,
+ o->size))
+ goto error_return;
+ }
+ else
+ {
+ /* The contents of the .dynstr section are actually in a
+ stringtab. */
+ off = elf_section_data (o->output_section)->this_hdr.sh_offset;
+ if (bfd_seek (abfd, off, SEEK_SET) != 0
+ || ! _bfd_elf_strtab_emit (abfd,
+ elf_hash_table (info)->dynstr))
+ goto error_return;
+ }
+ }
+ }
+
+ if (info->relocatable)
+ {
+ bfd_boolean failed = FALSE;
+
+ bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
+ if (failed)
+ goto error_return;
+ }
+
+ /* If we have optimized stabs strings, output them. */
+ if (elf_hash_table (info)->stab_info.stabstr != NULL)
+ {
+ if (! _bfd_write_stab_strings (abfd, &elf_hash_table (info)->stab_info))
+ goto error_return;
+ }
+
+ if (info->eh_frame_hdr)
+ {
+ if (! _bfd_elf_write_section_eh_frame_hdr (abfd, info))
+ goto error_return;
+ }
+
+ if (finfo.symstrtab != NULL)
+ _bfd_stringtab_free (finfo.symstrtab);
+ if (finfo.contents != NULL)
+ free (finfo.contents);
+ if (finfo.external_relocs != NULL)
+ free (finfo.external_relocs);
+ if (finfo.internal_relocs != NULL)
+ free (finfo.internal_relocs);
+ if (finfo.external_syms != NULL)
+ free (finfo.external_syms);
+ if (finfo.locsym_shndx != NULL)
+ free (finfo.locsym_shndx);
+ if (finfo.internal_syms != NULL)
+ free (finfo.internal_syms);
+ if (finfo.indices != NULL)
+ free (finfo.indices);
+ if (finfo.sections != NULL)
+ free (finfo.sections);
+ if (finfo.symbuf != NULL)
+ free (finfo.symbuf);
+ if (finfo.symshndxbuf != NULL)
+ free (finfo.symshndxbuf);
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ if ((o->flags & SEC_RELOC) != 0
+ && elf_section_data (o)->rel_hashes != NULL)
+ free (elf_section_data (o)->rel_hashes);
+ }
+
+ elf_tdata (abfd)->linker = TRUE;
+
+ return TRUE;
+
+ error_return:
+ if (finfo.symstrtab != NULL)
+ _bfd_stringtab_free (finfo.symstrtab);
+ if (finfo.contents != NULL)
+ free (finfo.contents);
+ if (finfo.external_relocs != NULL)
+ free (finfo.external_relocs);
+ if (finfo.internal_relocs != NULL)
+ free (finfo.internal_relocs);
+ if (finfo.external_syms != NULL)
+ free (finfo.external_syms);
+ if (finfo.locsym_shndx != NULL)
+ free (finfo.locsym_shndx);
+ if (finfo.internal_syms != NULL)
+ free (finfo.internal_syms);
+ if (finfo.indices != NULL)
+ free (finfo.indices);
+ if (finfo.sections != NULL)
+ free (finfo.sections);
+ if (finfo.symbuf != NULL)
+ free (finfo.symbuf);
+ if (finfo.symshndxbuf != NULL)
+ free (finfo.symshndxbuf);
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ if ((o->flags & SEC_RELOC) != 0
+ && elf_section_data (o)->rel_hashes != NULL)
+ free (elf_section_data (o)->rel_hashes);
+ }
+
+ return FALSE;
+}
+\f
+/* Garbage collect unused sections. */
+
+/* The mark phase of garbage collection. For a given section, mark
+ it and any sections in this section's group, and all the sections
+ which define symbols to which it refers. */
+
+typedef asection * (*gc_mark_hook_fn)
+ (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
+ struct elf_link_hash_entry *, Elf_Internal_Sym *);
+
+bfd_boolean
+_bfd_elf_gc_mark (struct bfd_link_info *info,
+ asection *sec,
+ gc_mark_hook_fn gc_mark_hook)
+{
+ bfd_boolean ret;
+ asection *group_sec;
+
+ sec->gc_mark = 1;
+
+ /* Mark all the sections in the group. */
+ group_sec = elf_section_data (sec)->next_in_group;
+ if (group_sec && !group_sec->gc_mark)
+ if (!_bfd_elf_gc_mark (info, group_sec, gc_mark_hook))
+ return FALSE;
+
+ /* Look through the section relocs. */
+ ret = TRUE;
+ if ((sec->flags & SEC_RELOC) != 0 && sec->reloc_count > 0)
+ {
+ Elf_Internal_Rela *relstart, *rel, *relend;
+ Elf_Internal_Shdr *symtab_hdr;
+ struct elf_link_hash_entry **sym_hashes;
+ size_t nlocsyms;
+ size_t extsymoff;
+ bfd *input_bfd = sec->owner;
+ const struct elf_backend_data *bed = get_elf_backend_data (input_bfd);
+ Elf_Internal_Sym *isym = NULL;
+ int r_sym_shift;
+
+ symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+ sym_hashes = elf_sym_hashes (input_bfd);
+
+ /* Read the local symbols. */
+ if (elf_bad_symtab (input_bfd))
+ {
+ nlocsyms = symtab_hdr->sh_size / bed->s->sizeof_sym;
+ extsymoff = 0;
+ }
+ else
+ extsymoff = nlocsyms = symtab_hdr->sh_info;
+
+ isym = (Elf_Internal_Sym *) symtab_hdr->contents;
+ if (isym == NULL && nlocsyms != 0)
+ {
+ isym = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, nlocsyms, 0,
+ NULL, NULL, NULL);
+ if (isym == NULL)
+ return FALSE;
+ }
+
+ /* Read the relocations. */
+ relstart = _bfd_elf_link_read_relocs (input_bfd, sec, NULL, NULL,
+ info->keep_memory);
+ if (relstart == NULL)
+ {
+ ret = FALSE;
+ goto out1;
+ }
+ relend = relstart + sec->reloc_count * bed->s->int_rels_per_ext_rel;
+
+ if (bed->s->arch_size == 32)
+ r_sym_shift = 8;
+ else
+ r_sym_shift = 32;
+
+ for (rel = relstart; rel < relend; rel++)
+ {
+ unsigned long r_symndx;
+ asection *rsec;
+ struct elf_link_hash_entry *h;
+
+ r_symndx = rel->r_info >> r_sym_shift;
+ if (r_symndx == 0)
+ continue;
+
+ if (r_symndx >= nlocsyms
+ || ELF_ST_BIND (isym[r_symndx].st_info) != STB_LOCAL)
+ {
+ h = sym_hashes[r_symndx - extsymoff];
+ while (h->root.type == bfd_link_hash_indirect
+ || h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+ rsec = (*gc_mark_hook) (sec, info, rel, h, NULL);
+ }
+ else
+ {
+ rsec = (*gc_mark_hook) (sec, info, rel, NULL, &isym[r_symndx]);
+ }
+
+ if (rsec && !rsec->gc_mark)
+ {
+ if (bfd_get_flavour (rsec->owner) != bfd_target_elf_flavour)
+ rsec->gc_mark = 1;
+ else if (!_bfd_elf_gc_mark (info, rsec, gc_mark_hook))
+ {
+ ret = FALSE;
+ goto out2;
+ }
+ }
+ }
+
+ out2:
+ if (elf_section_data (sec)->relocs != relstart)
+ free (relstart);
+ out1:
+ if (isym != NULL && symtab_hdr->contents != (unsigned char *) isym)
+ {
+ if (! info->keep_memory)
+ free (isym);
+ else
+ symtab_hdr->contents = (unsigned char *) isym;
+ }
+ }
+
+ return ret;
+}
+
+/* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */
+
+static bfd_boolean
+elf_gc_sweep_symbol (struct elf_link_hash_entry *h, void *idxptr)
+{
+ int *idx = idxptr;
+
+ if (h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+ if (h->dynindx != -1
+ && ((h->root.type != bfd_link_hash_defined
+ && h->root.type != bfd_link_hash_defweak)
+ || h->root.u.def.section->gc_mark))
+ h->dynindx = (*idx)++;
+
+ return TRUE;
+}
+
+/* The sweep phase of garbage collection. Remove all garbage sections. */
+
+typedef bfd_boolean (*gc_sweep_hook_fn)
+ (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *);
+
+static bfd_boolean
+elf_gc_sweep (struct bfd_link_info *info, gc_sweep_hook_fn gc_sweep_hook)
+{
+ bfd *sub;
+
+ for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
+ {
+ asection *o;
+
+ if (bfd_get_flavour (sub) != bfd_target_elf_flavour)
+ continue;
+
+ for (o = sub->sections; o != NULL; o = o->next)
+ {
+ /* Keep debug and special sections. */
+ if ((o->flags & (SEC_DEBUGGING | SEC_LINKER_CREATED)) != 0
+ || (o->flags & (SEC_ALLOC | SEC_LOAD)) == 0)
+ o->gc_mark = 1;
+
+ if (o->gc_mark)
+ continue;
+
+ /* Skip sweeping sections already excluded. */
+ if (o->flags & SEC_EXCLUDE)
+ continue;
+
+ /* Since this is early in the link process, it is simple
+ to remove a section from the output. */
+ o->flags |= SEC_EXCLUDE;
+
+ /* But we also have to update some of the relocation
+ info we collected before. */
+ if (gc_sweep_hook
+ && (o->flags & SEC_RELOC) && o->reloc_count > 0)
+ {
+ Elf_Internal_Rela *internal_relocs;
+ bfd_boolean r;
+
+ internal_relocs
+ = _bfd_elf_link_read_relocs (o->owner, o, NULL, NULL,
+ info->keep_memory);
+ if (internal_relocs == NULL)
+ return FALSE;
+
+ r = (*gc_sweep_hook) (o->owner, info, o, internal_relocs);
+
+ if (elf_section_data (o)->relocs != internal_relocs)
+ free (internal_relocs);
+
+ if (!r)
+ return FALSE;
+ }
+ }
+ }
+
+ /* Remove the symbols that were in the swept sections from the dynamic
+ symbol table. GCFIXME: Anyone know how to get them out of the
+ static symbol table as well? */
+ {
+ int i = 0;
+
+ elf_link_hash_traverse (elf_hash_table (info), elf_gc_sweep_symbol, &i);
+
+ elf_hash_table (info)->dynsymcount = i;
+ }
+
+ return TRUE;
+}
+
+/* Propagate collected vtable information. This is called through
+ elf_link_hash_traverse. */
+
+static bfd_boolean
+elf_gc_propagate_vtable_entries_used (struct elf_link_hash_entry *h, void *okp)
+{
+ if (h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+ /* Those that are not vtables. */
+ if (h->vtable == NULL || h->vtable->parent == NULL)
+ return TRUE;
+
+ /* Those vtables that do not have parents, we cannot merge. */
+ if (h->vtable->parent == (struct elf_link_hash_entry *) -1)
+ return TRUE;
+
+ /* If we've already been done, exit. */
+ if (h->vtable->used && h->vtable->used[-1])
+ return TRUE;
+
+ /* Make sure the parent's table is up to date. */
+ elf_gc_propagate_vtable_entries_used (h->vtable->parent, okp);
+
+ if (h->vtable->used == NULL)
+ {
+ /* None of this table's entries were referenced. Re-use the
+ parent's table. */
+ h->vtable->used = h->vtable->parent->vtable->used;
+ h->vtable->size = h->vtable->parent->vtable->size;
+ }
+ else
+ {
+ size_t n;
+ bfd_boolean *cu, *pu;
+
+ /* Or the parent's entries into ours. */
+ cu = h->vtable->used;
+ cu[-1] = TRUE;
+ pu = h->vtable->parent->vtable->used;
+ if (pu != NULL)
+ {
+ const struct elf_backend_data *bed;
+ unsigned int log_file_align;
+
+ bed = get_elf_backend_data (h->root.u.def.section->owner);
+ log_file_align = bed->s->log_file_align;
+ n = h->vtable->parent->vtable->size >> log_file_align;
+ while (n--)
+ {
+ if (*pu)
+ *cu = TRUE;
+ pu++;
+ cu++;
+ }
+ }
+ }
+
+ return TRUE;
+}
+
+static bfd_boolean
+elf_gc_smash_unused_vtentry_relocs (struct elf_link_hash_entry *h, void *okp)
+{
+ asection *sec;
+ bfd_vma hstart, hend;
+ Elf_Internal_Rela *relstart, *relend, *rel;
+ const struct elf_backend_data *bed;
+ unsigned int log_file_align;
+
+ if (h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+ /* Take care of both those symbols that do not describe vtables as
+ well as those that are not loaded. */
+ if (h->vtable == NULL || h->vtable->parent == NULL)
+ return TRUE;
+
+ BFD_ASSERT (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak);
+
+ sec = h->root.u.def.section;
+ hstart = h->root.u.def.value;
+ hend = hstart + h->size;
+
+ relstart = _bfd_elf_link_read_relocs (sec->owner, sec, NULL, NULL, TRUE);
+ if (!relstart)
+ return *(bfd_boolean *) okp = FALSE;
+ bed = get_elf_backend_data (sec->owner);
+ log_file_align = bed->s->log_file_align;
+
+ relend = relstart + sec->reloc_count * bed->s->int_rels_per_ext_rel;
+
+ for (rel = relstart; rel < relend; ++rel)
+ if (rel->r_offset >= hstart && rel->r_offset < hend)
+ {
+ /* If the entry is in use, do nothing. */
+ if (h->vtable->used
+ && (rel->r_offset - hstart) < h->vtable->size)
+ {
+ bfd_vma entry = (rel->r_offset - hstart) >> log_file_align;
+ if (h->vtable->used[entry])
+ continue;
+ }
+ /* Otherwise, kill it. */
+ rel->r_offset = rel->r_info = rel->r_addend = 0;
+ }
+
+ return TRUE;
+}
+
+/* Mark sections containing dynamically referenced symbols. This is called
+ through elf_link_hash_traverse. */
+
+static bfd_boolean
+elf_gc_mark_dynamic_ref_symbol (struct elf_link_hash_entry *h,
+ void *okp ATTRIBUTE_UNUSED)
+{
+ if (h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+ if ((h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ && h->ref_dynamic)
+ h->root.u.def.section->flags |= SEC_KEEP;
+
+ return TRUE;
+}
+
+/* Mark sections containing global symbols. This is called through
+ elf_link_hash_traverse. */
+
+static bfd_boolean
+elf_mark_used_section (struct elf_link_hash_entry *h,
+ void *data ATTRIBUTE_UNUSED)
+{
+ if (h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+ if (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ {
+ asection *s = h->root.u.def.section;
+ if (s != NULL && s->output_section != NULL)
+ s->output_section->flags |= SEC_KEEP;
+ }
+
+ return TRUE;
+}
+
+/* Do mark and sweep of unused sections. */
+
+bfd_boolean
+bfd_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
+{
+ bfd_boolean ok = TRUE;
+ bfd *sub;
+ asection * (*gc_mark_hook)
+ (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
+ struct elf_link_hash_entry *h, Elf_Internal_Sym *);
+
+ if (!info->gc_sections)
+ {
+ /* If we are called when info->gc_sections is 0, we will mark
+ all sections containing global symbols for non-relocatable
+ link. */
+ if (!info->relocatable)
+ elf_link_hash_traverse (elf_hash_table (info),
+ elf_mark_used_section, NULL);
+ return TRUE;
+ }
+
+ if (!get_elf_backend_data (abfd)->can_gc_sections
+ || info->relocatable
+ || info->emitrelocations
+ || info->shared
+ || !is_elf_hash_table (info->hash))
+ {
+ (*_bfd_error_handler)(_("Warning: gc-sections option ignored"));
+ return TRUE;
+ }
+
+ /* Apply transitive closure to the vtable entry usage info. */
+ elf_link_hash_traverse (elf_hash_table (info),
+ elf_gc_propagate_vtable_entries_used,
+ &ok);
+ if (!ok)
+ return FALSE;
+
+ /* Kill the vtable relocations that were not used. */
+ elf_link_hash_traverse (elf_hash_table (info),
+ elf_gc_smash_unused_vtentry_relocs,
+ &ok);
+ if (!ok)
+ return FALSE;
+
+ /* Mark dynamically referenced symbols. */
+ if (elf_hash_table (info)->dynamic_sections_created)
+ elf_link_hash_traverse (elf_hash_table (info),
+ elf_gc_mark_dynamic_ref_symbol,
+ &ok);
+ if (!ok)
+ return FALSE;
+
+ /* Grovel through relocs to find out who stays ... */
+ gc_mark_hook = get_elf_backend_data (abfd)->gc_mark_hook;
+ for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
+ {
+ asection *o;
+
+ if (bfd_get_flavour (sub) != bfd_target_elf_flavour)
+ continue;
+
+ for (o = sub->sections; o != NULL; o = o->next)
+ {
+ if (o->flags & SEC_KEEP)
+ {
+ /* _bfd_elf_discard_section_eh_frame knows how to discard
+ orphaned FDEs so don't mark sections referenced by the
+ EH frame section. */
+ if (strcmp (o->name, ".eh_frame") == 0)
+ o->gc_mark = 1;
+ else if (!_bfd_elf_gc_mark (info, o, gc_mark_hook))
+ return FALSE;
+ }
+ }
+ }
+
+ /* ... and mark SEC_EXCLUDE for those that go. */
+ if (!elf_gc_sweep (info, get_elf_backend_data (abfd)->gc_sweep_hook))
+ return FALSE;
+
+ return TRUE;
+}
+\f
+/* Called from check_relocs to record the existence of a VTINHERIT reloc. */
+
+bfd_boolean
+bfd_elf_gc_record_vtinherit (bfd *abfd,
+ asection *sec,
+ struct elf_link_hash_entry *h,
+ bfd_vma offset)
+{
+ struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
+ struct elf_link_hash_entry **search, *child;
+ bfd_size_type extsymcount;
+ const struct elf_backend_data *bed = get_elf_backend_data (abfd);
+
+ /* The sh_info field of the symtab header tells us where the
+ external symbols start. We don't care about the local symbols at
+ this point. */
+ extsymcount = elf_tdata (abfd)->symtab_hdr.sh_size / bed->s->sizeof_sym;
+ if (!elf_bad_symtab (abfd))
+ extsymcount -= elf_tdata (abfd)->symtab_hdr.sh_info;
+
+ sym_hashes = elf_sym_hashes (abfd);
+ sym_hashes_end = sym_hashes + extsymcount;
+
+ /* Hunt down the child symbol, which is in this section at the same
+ offset as the relocation. */
+ for (search = sym_hashes; search != sym_hashes_end; ++search)
+ {
+ if ((child = *search) != NULL
+ && (child->root.type == bfd_link_hash_defined
+ || child->root.type == bfd_link_hash_defweak)
+ && child->root.u.def.section == sec
+ && child->root.u.def.value == offset)
+ goto win;
+ }
+
+ (*_bfd_error_handler) ("%B: %A+%lu: No symbol found for INHERIT",
+ abfd, sec, (unsigned long) offset);
+ bfd_set_error (bfd_error_invalid_operation);
+ return FALSE;
+
+ win:
+ if (!child->vtable)
+ {
+ child->vtable = bfd_zalloc (abfd, sizeof (*child->vtable));
+ if (!child->vtable)
+ return FALSE;
+ }
+ if (!h)
+ {
+ /* This *should* only be the absolute section. It could potentially
+ be that someone has defined a non-global vtable though, which
+ would be bad. It isn't worth paging in the local symbols to be
+ sure though; that case should simply be handled by the assembler. */
+
+ child->vtable->parent = (struct elf_link_hash_entry *) -1;
+ }
+ else
+ child->vtable->parent = h;
+
+ return TRUE;
+}
+
+/* Called from check_relocs to record the existence of a VTENTRY reloc. */
+
+bfd_boolean
+bfd_elf_gc_record_vtentry (bfd *abfd ATTRIBUTE_UNUSED,
+ asection *sec ATTRIBUTE_UNUSED,
+ struct elf_link_hash_entry *h,
+ bfd_vma addend)
+{
+ const struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ unsigned int log_file_align = bed->s->log_file_align;
+
+ if (!h->vtable)
+ {
+ h->vtable = bfd_zalloc (abfd, sizeof (*h->vtable));
+ if (!h->vtable)
+ return FALSE;
+ }
+
+ if (addend >= h->vtable->size)
+ {
+ size_t size, bytes, file_align;
+ bfd_boolean *ptr = h->vtable->used;
+
+ /* While the symbol is undefined, we have to be prepared to handle
+ a zero size. */
+ file_align = 1 << log_file_align;
+ if (h->root.type == bfd_link_hash_undefined)
+ size = addend + file_align;
+ else
+ {
+ size = h->size;
+ if (addend >= size)
+ {
+ /* Oops! We've got a reference past the defined end of
+ the table. This is probably a bug -- shall we warn? */
+ size = addend + file_align;
+ }
+ }
+ size = (size + file_align - 1) & -file_align;
+
+ /* Allocate one extra entry for use as a "done" flag for the
+ consolidation pass. */
+ bytes = ((size >> log_file_align) + 1) * sizeof (bfd_boolean);
+
+ if (ptr)
+ {
+ ptr = bfd_realloc (ptr - 1, bytes);
+
+ if (ptr != NULL)
+ {
+ size_t oldbytes;
+
+ oldbytes = (((h->vtable->size >> log_file_align) + 1)
+ * sizeof (bfd_boolean));
+ memset (((char *) ptr) + oldbytes, 0, bytes - oldbytes);
+ }
+ }
+ else
+ ptr = bfd_zmalloc (bytes);
+
+ if (ptr == NULL)
+ return FALSE;
+
+ /* And arrange for that done flag to be at index -1. */
+ h->vtable->used = ptr + 1;
+ h->vtable->size = size;
+ }
+
+ h->vtable->used[addend >> log_file_align] = TRUE;
+
+ return TRUE;
+}
+
+struct alloc_got_off_arg {
+ bfd_vma gotoff;
+ unsigned int got_elt_size;
+};
+
+/* We need a special top-level link routine to convert got reference counts
+ to real got offsets. */
+
+static bfd_boolean
+elf_gc_allocate_got_offsets (struct elf_link_hash_entry *h, void *arg)
+{
+ struct alloc_got_off_arg *gofarg = arg;
+
+ if (h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+ if (h->got.refcount > 0)
+ {
+ h->got.offset = gofarg->gotoff;
+ gofarg->gotoff += gofarg->got_elt_size;
+ }
+ else
+ h->got.offset = (bfd_vma) -1;
+
+ return TRUE;
+}
+
+/* And an accompanying bit to work out final got entry offsets once
+ we're done. Should be called from final_link. */
+
+bfd_boolean
+bfd_elf_gc_common_finalize_got_offsets (bfd *abfd,
+ struct bfd_link_info *info)
+{
+ bfd *i;
+ const struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ bfd_vma gotoff;
+ unsigned int got_elt_size = bed->s->arch_size / 8;
+ struct alloc_got_off_arg gofarg;
+
+ if (! is_elf_hash_table (info->hash))
+ return FALSE;
+
+ /* The GOT offset is relative to the .got section, but the GOT header is
+ put into the .got.plt section, if the backend uses it. */
+ if (bed->want_got_plt)
+ gotoff = 0;
+ else
+ gotoff = bed->got_header_size;
+
+ /* Do the local .got entries first. */
+ for (i = info->input_bfds; i; i = i->link_next)
+ {
+ bfd_signed_vma *local_got;
+ bfd_size_type j, locsymcount;
+ Elf_Internal_Shdr *symtab_hdr;
+
+ if (bfd_get_flavour (i) != bfd_target_elf_flavour)
+ continue;
+
+ local_got = elf_local_got_refcounts (i);
+ if (!local_got)
+ continue;
+
+ symtab_hdr = &elf_tdata (i)->symtab_hdr;
+ if (elf_bad_symtab (i))
+ locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym;
+ else
+ locsymcount = symtab_hdr->sh_info;
+
+ for (j = 0; j < locsymcount; ++j)
+ {
+ if (local_got[j] > 0)
+ {
+ local_got[j] = gotoff;
+ gotoff += got_elt_size;
+ }
+ else
+ local_got[j] = (bfd_vma) -1;
+ }
+ }
+
+ /* Then the global .got entries. .plt refcounts are handled by
+ adjust_dynamic_symbol */
+ gofarg.gotoff = gotoff;
+ gofarg.got_elt_size = got_elt_size;
+ elf_link_hash_traverse (elf_hash_table (info),
+ elf_gc_allocate_got_offsets,
+ &gofarg);
+ return TRUE;
+}
+
+/* Many folk need no more in the way of final link than this, once
+ got entry reference counting is enabled. */
+
+bfd_boolean
+bfd_elf_gc_common_final_link (bfd *abfd, struct bfd_link_info *info)
+{
+ if (!bfd_elf_gc_common_finalize_got_offsets (abfd, info))
+ return FALSE;
+
+ /* Invoke the regular ELF backend linker to do all the work. */
+ return bfd_elf_final_link (abfd, info);
+}
+
+bfd_boolean
+bfd_elf_reloc_symbol_deleted_p (bfd_vma offset, void *cookie)
+{
+ struct elf_reloc_cookie *rcookie = cookie;
+
+ if (rcookie->bad_symtab)
+ rcookie->rel = rcookie->rels;
+
+ for (; rcookie->rel < rcookie->relend; rcookie->rel++)
+ {
+ unsigned long r_symndx;
+
+ if (! rcookie->bad_symtab)
+ if (rcookie->rel->r_offset > offset)
+ return FALSE;
+ if (rcookie->rel->r_offset != offset)
+ continue;
+
+ r_symndx = rcookie->rel->r_info >> rcookie->r_sym_shift;
+ if (r_symndx == SHN_UNDEF)
+ return TRUE;
+
+ if (r_symndx >= rcookie->locsymcount
+ || ELF_ST_BIND (rcookie->locsyms[r_symndx].st_info) != STB_LOCAL)
+ {
+ struct elf_link_hash_entry *h;
+
+ h = rcookie->sym_hashes[r_symndx - rcookie->extsymoff];
+
+ while (h->root.type == bfd_link_hash_indirect
+ || h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+ if ((h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ && elf_discarded_section (h->root.u.def.section))
+ return TRUE;
+ else
+ return FALSE;
+ }
+ else
+ {
+ /* It's not a relocation against a global symbol,
+ but it could be a relocation against a local
+ symbol for a discarded section. */
+ asection *isec;
+ Elf_Internal_Sym *isym;
+
+ /* Need to: get the symbol; get the section. */
+ isym = &rcookie->locsyms[r_symndx];
+ if (isym->st_shndx < SHN_LORESERVE || isym->st_shndx > SHN_HIRESERVE)
+ {
+ isec = bfd_section_from_elf_index (rcookie->abfd, isym->st_shndx);
+ if (isec != NULL && elf_discarded_section (isec))
+ return TRUE;
+ }
+ }
+ return FALSE;
+ }
+ return FALSE;
+}
+
+/* Discard unneeded references to discarded sections.
+ Returns TRUE if any section's size was changed. */
+/* This function assumes that the relocations are in sorted order,
+ which is true for all known assemblers. */
+
+bfd_boolean
+bfd_elf_discard_info (bfd *output_bfd, struct bfd_link_info *info)
+{
+ struct elf_reloc_cookie cookie;
+ asection *stab, *eh;
+ Elf_Internal_Shdr *symtab_hdr;
+ const struct elf_backend_data *bed;
+ bfd *abfd;
+ unsigned int count;
+ bfd_boolean ret = FALSE;
+
+ if (info->traditional_format
+ || !is_elf_hash_table (info->hash))
+ return FALSE;
+
+ for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link_next)
+ {
+ if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
+ continue;
+
+ bed = get_elf_backend_data (abfd);
+
+ if ((abfd->flags & DYNAMIC) != 0)
+ continue;
+
+ eh = bfd_get_section_by_name (abfd, ".eh_frame");
+ if (info->relocatable
+ || (eh != NULL
+ && (eh->size == 0
+ || bfd_is_abs_section (eh->output_section))))
+ eh = NULL;
+
+ stab = bfd_get_section_by_name (abfd, ".stab");
+ if (stab != NULL
+ && (stab->size == 0
+ || bfd_is_abs_section (stab->output_section)
+ || stab->sec_info_type != ELF_INFO_TYPE_STABS))
+ stab = NULL;
+
+ if (stab == NULL
+ && eh == NULL
+ && bed->elf_backend_discard_info == NULL)
+ continue;
+
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ cookie.abfd = abfd;
+ cookie.sym_hashes = elf_sym_hashes (abfd);
+ cookie.bad_symtab = elf_bad_symtab (abfd);
+ if (cookie.bad_symtab)
+ {
+ cookie.locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym;
+ cookie.extsymoff = 0;
+ }
+ else
+ {
+ cookie.locsymcount = symtab_hdr->sh_info;
+ cookie.extsymoff = symtab_hdr->sh_info;
+ }
+
+ if (bed->s->arch_size == 32)
+ cookie.r_sym_shift = 8;
+ else
+ cookie.r_sym_shift = 32;
+
+ cookie.locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
+ if (cookie.locsyms == NULL && cookie.locsymcount != 0)
+ {
+ cookie.locsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr,
+ cookie.locsymcount, 0,
+ NULL, NULL, NULL);
+ if (cookie.locsyms == NULL)
+ return FALSE;
+ }
+
+ if (stab != NULL)
+ {
+ cookie.rels = NULL;
+ count = stab->reloc_count;
+ if (count != 0)
+ cookie.rels = _bfd_elf_link_read_relocs (abfd, stab, NULL, NULL,
+ info->keep_memory);
+ if (cookie.rels != NULL)
+ {
+ cookie.rel = cookie.rels;
+ cookie.relend = cookie.rels;
+ cookie.relend += count * bed->s->int_rels_per_ext_rel;
+ if (_bfd_discard_section_stabs (abfd, stab,
+ elf_section_data (stab)->sec_info,
+ bfd_elf_reloc_symbol_deleted_p,
+ &cookie))
+ ret = TRUE;
+ if (elf_section_data (stab)->relocs != cookie.rels)
+ free (cookie.rels);
+ }
+ }
+
+ if (eh != NULL)
+ {
+ cookie.rels = NULL;
+ count = eh->reloc_count;
+ if (count != 0)
+ cookie.rels = _bfd_elf_link_read_relocs (abfd, eh, NULL, NULL,
+ info->keep_memory);
+ cookie.rel = cookie.rels;
+ cookie.relend = cookie.rels;
+ if (cookie.rels != NULL)
+ cookie.relend += count * bed->s->int_rels_per_ext_rel;
+
+ if (_bfd_elf_discard_section_eh_frame (abfd, info, eh,
+ bfd_elf_reloc_symbol_deleted_p,
+ &cookie))
+ ret = TRUE;
+
+ if (cookie.rels != NULL
+ && elf_section_data (eh)->relocs != cookie.rels)
+ free (cookie.rels);
+ }
+
+ if (bed->elf_backend_discard_info != NULL
+ && (*bed->elf_backend_discard_info) (abfd, &cookie, info))
+ ret = TRUE;
+
+ if (cookie.locsyms != NULL
+ && symtab_hdr->contents != (unsigned char *) cookie.locsyms)
+ {
+ if (! info->keep_memory)
+ free (cookie.locsyms);
+ else
+ symtab_hdr->contents = (unsigned char *) cookie.locsyms;
+ }
+ }
+
+ if (info->eh_frame_hdr
+ && !info->relocatable
+ && _bfd_elf_discard_section_eh_frame_hdr (output_bfd, info))
+ ret = TRUE;
+
+ return ret;
+}
+
+void
+_bfd_elf_section_already_linked (bfd *abfd, struct bfd_section * sec)
+{
+ flagword flags;
+ const char *name, *p;
+ struct bfd_section_already_linked *l;
+ struct bfd_section_already_linked_hash_entry *already_linked_list;
+ asection *group;
+
+ /* A single member comdat group section may be discarded by a
+ linkonce section. See below. */
+ if (sec->output_section == bfd_abs_section_ptr)
+ return;
+
+ flags = sec->flags;
+
+ /* Check if it belongs to a section group. */
+ group = elf_sec_group (sec);
+
+ /* Return if it isn't a linkonce section nor a member of a group. A
+ comdat group section also has SEC_LINK_ONCE set. */
+ if ((flags & SEC_LINK_ONCE) == 0 && group == NULL)
+ return;
+
+ if (group)
+ {
+ /* If this is the member of a single member comdat group, check if
+ the group should be discarded. */
+ if (elf_next_in_group (sec) == sec
+ && (group->flags & SEC_LINK_ONCE) != 0)
+ sec = group;
+ else
+ return;
+ }
+
+ /* FIXME: When doing a relocatable link, we may have trouble
+ copying relocations in other sections that refer to local symbols
+ in the section being discarded. Those relocations will have to
+ be converted somehow; as of this writing I'm not sure that any of
+ the backends handle that correctly.
+
+ It is tempting to instead not discard link once sections when
+ doing a relocatable link (technically, they should be discarded
+ whenever we are building constructors). However, that fails,
+ because the linker winds up combining all the link once sections
+ into a single large link once section, which defeats the purpose
+ of having link once sections in the first place.
+
+ Also, not merging link once sections in a relocatable link
+ causes trouble for MIPS ELF, which relies on link once semantics
+ to handle the .reginfo section correctly. */
+
+ name = bfd_get_section_name (abfd, sec);
+
+ if (strncmp (name, ".gnu.linkonce.", sizeof (".gnu.linkonce.") - 1) == 0
+ && (p = strchr (name + sizeof (".gnu.linkonce.") - 1, '.')) != NULL)
+ p++;
+ else
+ p = name;
+
+ already_linked_list = bfd_section_already_linked_table_lookup (p);
+
+ for (l = already_linked_list->entry; l != NULL; l = l->next)
+ {
+ /* We may have 3 different sections on the list: group section,
+ comdat section and linkonce section. SEC may be a linkonce or
+ group section. We match a group section with a group section,
+ a linkonce section with a linkonce section, and ignore comdat
+ section. */
+ if ((flags & SEC_GROUP) == (l->sec->flags & SEC_GROUP)
+ && strcmp (name, l->sec->name) == 0
+ && bfd_coff_get_comdat_section (l->sec->owner, l->sec) == NULL)
+ {
+ /* The section has already been linked. See if we should
+ issue a warning. */
+ switch (flags & SEC_LINK_DUPLICATES)
+ {
+ default:
+ abort ();
+
+ case SEC_LINK_DUPLICATES_DISCARD:
+ break;
+
+ case SEC_LINK_DUPLICATES_ONE_ONLY:
+ (*_bfd_error_handler)
+ (_("%B: ignoring duplicate section `%A'"),
+ abfd, sec);
+ break;
+
+ case SEC_LINK_DUPLICATES_SAME_SIZE:
+ if (sec->size != l->sec->size)
+ (*_bfd_error_handler)
+ (_("%B: duplicate section `%A' has different size"),
+ abfd, sec);
+ break;
+
+ case SEC_LINK_DUPLICATES_SAME_CONTENTS:
+ if (sec->size != l->sec->size)
+ (*_bfd_error_handler)
+ (_("%B: duplicate section `%A' has different size"),
+ abfd, sec);
+ else if (sec->size != 0)
+ {
+ bfd_byte *sec_contents, *l_sec_contents;
+
+ if (!bfd_malloc_and_get_section (abfd, sec, &sec_contents))
+ (*_bfd_error_handler)
+ (_("%B: warning: could not read contents of section `%A'"),
+ abfd, sec);
+ else if (!bfd_malloc_and_get_section (l->sec->owner, l->sec,
+ &l_sec_contents))
+ (*_bfd_error_handler)
+ (_("%B: warning: could not read contents of section `%A'"),
+ l->sec->owner, l->sec);
+ else if (memcmp (sec_contents, l_sec_contents, sec->size) != 0)
+ (*_bfd_error_handler)
+ (_("%B: warning: duplicate section `%A' has different contents"),
+ abfd, sec);
+
+ if (sec_contents)
+ free (sec_contents);
+ if (l_sec_contents)
+ free (l_sec_contents);
+ }
+ break;
+ }
+
+ /* Set the output_section field so that lang_add_section
+ does not create a lang_input_section structure for this
+ section. Since there might be a symbol in the section
+ being discarded, we must retain a pointer to the section
+ which we are really going to use. */
+ sec->output_section = bfd_abs_section_ptr;
+ sec->kept_section = l->sec;
+
+ if (flags & SEC_GROUP)
+ {
+ asection *first = elf_next_in_group (sec);
+ asection *s = first;
+
+ while (s != NULL)
+ {
+ s->output_section = bfd_abs_section_ptr;
+ /* Record which group discards it. */
+ s->kept_section = l->sec;
+ s = elf_next_in_group (s);
+ /* These lists are circular. */
+ if (s == first)
+ break;
+ }
+ }
+
+ return;
+ }
+ }
+
+ if (group)
+ {
+ /* If this is the member of a single member comdat group and the
+ group hasn't be discarded, we check if it matches a linkonce
+ section. We only record the discarded comdat group. Otherwise
+ the undiscarded group will be discarded incorrectly later since
+ itself has been recorded. */
+ for (l = already_linked_list->entry; l != NULL; l = l->next)
+ if ((l->sec->flags & SEC_GROUP) == 0
+ && bfd_coff_get_comdat_section (l->sec->owner, l->sec) == NULL
+ && bfd_elf_match_symbols_in_sections (l->sec,
+ elf_next_in_group (sec)))
+ {
+ elf_next_in_group (sec)->output_section = bfd_abs_section_ptr;
+ elf_next_in_group (sec)->kept_section = l->sec;
+ group->output_section = bfd_abs_section_ptr;
+ break;
+ }
+ if (l == NULL)
+ return;
+ }
+ else
+ /* There is no direct match. But for linkonce section, we should
+ check if there is a match with comdat group member. We always
+ record the linkonce section, discarded or not. */
+ for (l = already_linked_list->entry; l != NULL; l = l->next)
+ if (l->sec->flags & SEC_GROUP)
+ {
+ asection *first = elf_next_in_group (l->sec);
+
+ if (first != NULL
+ && elf_next_in_group (first) == first
+ && bfd_elf_match_symbols_in_sections (first, sec))
+ {
+ sec->output_section = bfd_abs_section_ptr;
+ sec->kept_section = l->sec;
+ break;
+ }
+ }
+
+ /* This is the first section with this name. Record it. */
+ bfd_section_already_linked_table_insert (already_linked_list, sec);
+}
+
+/* Set NAME to VAL if the symbol exists and is undefined. */
+
+void
+_bfd_elf_provide_symbol (struct bfd_link_info *info, const char *name,
+ bfd_vma val)
+{
+ struct elf_link_hash_entry *h;
+
+ h = elf_link_hash_lookup (elf_hash_table (info), name, FALSE, FALSE,
+ FALSE);
+ if (h != NULL && (h->root.type == bfd_link_hash_undefined
+ || h->root.type == bfd_link_hash_undefweak))
+ {
+ h->root.type = bfd_link_hash_defined;
+ h->root.u.def.section = bfd_abs_section_ptr;
+ h->root.u.def.value = val;
+ h->def_regular = 1;
+ h->type = STT_OBJECT;
+ h->other = STV_HIDDEN | (h->other & ~ ELF_ST_VISIBILITY (-1));
+ h->forced_local = 1;
+ }
+}
projects / binutils-gdb.git / blobdiff