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binutils-gdb/bfd/elf32-hppa.c
Alan Modra 26e415943a * elf32-hppa.c (elf32_hppa_gc_sweep_hook): Simplify dynamic reloc 
removal.  Localize vars.  Remove unnecessary dynobj test.
	* elf32-i386 (WILL_CALL_FINISH_DYNAMIC_SYMBOL): Pass SHARED instead
	of INFO.
	(allocate_dynrelocs): Adjust WILL_CALL_FINISH_DYNAMIC_SYMBOL uses,
	and optimize.
	(elf_i386_relocate_section): Likewise.
	(elf_i386_gc_sweep_hook): Simplify dyn reloc removal.  Localize vars.
	* elf32-s390.c (elf_s390_gc_sweep_hook): Likewise.
	* elf32-sh.c (sh_elf_gc_sweep_hook): Likewise.
	* elf64-s390.c (elf_s390_gc_sweep_hook): Likewise.
	* elf64-x86-64.c (elf64_x86_64_gc_sweep_hook): Likewise.
	* elf32-sparc.c (elf32_sparc_gc_sweep_hook): Likewise.  Remove
	local_dynrel for section too.  Don't touch HIPLT22, LOPLT10, PCPLT32
	or PCPLT10 relocs.  Don't subtract twice on PLT32 relocs.
	Formatting.
2003-02-19 14:14:16 +00:00

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/* BFD back-end for HP PA-RISC ELF files.
Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1999, 2000, 2001,
2002, 2003 Free Software Foundation, Inc.
Original code by
Center for Software Science
Department of Computer Science
University of Utah
Largely rewritten by Alan Modra <alan@linuxcare.com.au>
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 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. */
#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/hppa.h"
#include "libhppa.h"
#include "elf32-hppa.h"
#define ARCH_SIZE 32
#include "elf32-hppa.h"
#include "elf-hppa.h"
/* In order to gain some understanding of code in this file without
knowing all the intricate details of the linker, note the
following:
Functions named elf32_hppa_* are called by external routines, other
functions are only called locally. elf32_hppa_* functions appear
in this file more or less in the order in which they are called
from external routines. eg. elf32_hppa_check_relocs is called
early in the link process, elf32_hppa_finish_dynamic_sections is
one of the last functions. */
/* We use two hash tables to hold information for linking PA ELF objects.
The first is the elf32_hppa_link_hash_table which is derived
from the standard ELF linker hash table. We use this as a place to
attach other hash tables and static information.
The second is the stub hash table which is derived from the
base BFD hash table. The stub hash table holds the information
necessary to build the linker stubs during a link.
There are a number of different stubs generated by the linker.
Long branch stub:
: ldil LR'X,%r1
: be,n RR'X(%sr4,%r1)
PIC long branch stub:
: b,l .+8,%r1
: addil LR'X - ($PIC_pcrel$0 - 4),%r1
: be,n RR'X - ($PIC_pcrel$0 - 8)(%sr4,%r1)
Import stub to call shared library routine from normal object file
(single sub-space version)
: addil LR'lt_ptr+ltoff,%dp ; get procedure entry point
: ldw RR'lt_ptr+ltoff(%r1),%r21
: bv %r0(%r21)
: ldw RR'lt_ptr+ltoff+4(%r1),%r19 ; get new dlt value.
Import stub to call shared library routine from shared library
(single sub-space version)
: addil LR'ltoff,%r19 ; get procedure entry point
: ldw RR'ltoff(%r1),%r21
: bv %r0(%r21)
: ldw RR'ltoff+4(%r1),%r19 ; get new dlt value.
Import stub to call shared library routine from normal object file
(multiple sub-space support)
: addil LR'lt_ptr+ltoff,%dp ; get procedure entry point
: ldw RR'lt_ptr+ltoff(%r1),%r21
: ldw RR'lt_ptr+ltoff+4(%r1),%r19 ; get new dlt value.
: ldsid (%r21),%r1
: mtsp %r1,%sr0
: be 0(%sr0,%r21) ; branch to target
: stw %rp,-24(%sp) ; save rp
Import stub to call shared library routine from shared library
(multiple sub-space support)
: addil LR'ltoff,%r19 ; get procedure entry point
: ldw RR'ltoff(%r1),%r21
: ldw RR'ltoff+4(%r1),%r19 ; get new dlt value.
: ldsid (%r21),%r1
: mtsp %r1,%sr0
: be 0(%sr0,%r21) ; branch to target
: stw %rp,-24(%sp) ; save rp
Export stub to return from shared lib routine (multiple sub-space support)
One of these is created for each exported procedure in a shared
library (and stored in the shared lib). Shared lib routines are
called via the first instruction in the export stub so that we can
do an inter-space return. Not required for single sub-space.
: bl,n X,%rp ; trap the return
: nop
: ldw -24(%sp),%rp ; restore the original rp
: ldsid (%rp),%r1
: mtsp %r1,%sr0
: be,n 0(%sr0,%rp) ; inter-space return. */
#define PLT_ENTRY_SIZE 8
#define GOT_ENTRY_SIZE 4
#define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
static const bfd_byte plt_stub[] =
{
0x0e, 0x80, 0x10, 0x96, /* 1: ldw 0(%r20),%r22 */
0xea, 0xc0, 0xc0, 0x00, /* bv %r0(%r22) */
0x0e, 0x88, 0x10, 0x95, /* ldw 4(%r20),%r21 */
#define PLT_STUB_ENTRY (3*4)
0xea, 0x9f, 0x1f, 0xdd, /* b,l 1b,%r20 */
0xd6, 0x80, 0x1c, 0x1e, /* depi 0,31,2,%r20 */
0x00, 0xc0, 0xff, 0xee, /* 9: .word fixup_func */
0xde, 0xad, 0xbe, 0xef /* .word fixup_ltp */
};
/* Section name for stubs is the associated section name plus this
string. */
#define STUB_SUFFIX ".stub"
/* We don't need to copy certain PC- or GP-relative dynamic relocs
into a shared object's dynamic section. All the relocs of the
limited class we are interested in, are absolute. */
#ifndef RELATIVE_DYNRELOCS
#define RELATIVE_DYNRELOCS 0
#define IS_ABSOLUTE_RELOC(r_type) 1
#endif
enum elf32_hppa_stub_type {
hppa_stub_long_branch,
hppa_stub_long_branch_shared,
hppa_stub_import,
hppa_stub_import_shared,
hppa_stub_export,
hppa_stub_none
};
struct elf32_hppa_stub_hash_entry {
/* Base hash table entry structure. */
struct bfd_hash_entry root;
/* The stub section. */
asection *stub_sec;
/* Offset within stub_sec of the beginning of this stub. */
bfd_vma stub_offset;
/* Given the symbol's value and its section we can determine its final
value when building the stubs (so the stub knows where to jump. */
bfd_vma target_value;
asection *target_section;
enum elf32_hppa_stub_type stub_type;
/* The symbol table entry, if any, that this was derived from. */
struct elf32_hppa_link_hash_entry *h;
/* Where this stub is being called from, or, in the case of combined
stub sections, the first input section in the group. */
asection *id_sec;
};
struct elf32_hppa_link_hash_entry {
struct elf_link_hash_entry elf;
/* A pointer to the most recently used stub hash entry against this
symbol. */
struct elf32_hppa_stub_hash_entry *stub_cache;
/* Used to count relocations for delayed sizing of relocation
sections. */
struct elf32_hppa_dyn_reloc_entry {
/* Next relocation in the chain. */
struct elf32_hppa_dyn_reloc_entry *next;
/* The input section of the reloc. */
asection *sec;
/* Number of relocs copied in this section. */
bfd_size_type count;
#if RELATIVE_DYNRELOCS
/* Number of relative relocs copied for the input section. */
bfd_size_type relative_count;
#endif
} *dyn_relocs;
/* Set if the only reason we need a .plt entry is for a non-PIC to
PIC function call. */
unsigned int pic_call:1;
/* Set if this symbol is used by a plabel reloc. */
unsigned int plabel:1;
};
struct elf32_hppa_link_hash_table {
/* The main hash table. */
struct elf_link_hash_table elf;
/* The stub hash table. */
struct bfd_hash_table stub_hash_table;
/* Linker stub bfd. */
bfd *stub_bfd;
/* Linker call-backs. */
asection * (*add_stub_section) PARAMS ((const char *, asection *));
void (*layout_sections_again) PARAMS ((void));
/* Array to keep track of which stub sections have been created, and
information on stub grouping. */
struct map_stub {
/* This is the section to which stubs in the group will be
attached. */
asection *link_sec;
/* The stub section. */
asection *stub_sec;
} *stub_group;
/* Assorted information used by elf32_hppa_size_stubs. */
unsigned int bfd_count;
int top_index;
asection **input_list;
Elf_Internal_Sym **all_local_syms;
/* Short-cuts to get to dynamic linker sections. */
asection *sgot;
asection *srelgot;
asection *splt;
asection *srelplt;
asection *sdynbss;
asection *srelbss;
/* Used during a final link to store the base of the text and data
segments so that we can perform SEGREL relocations. */
bfd_vma text_segment_base;
bfd_vma data_segment_base;
/* Whether we support multiple sub-spaces for shared libs. */
unsigned int multi_subspace:1;
/* Flags set when various size branches are detected. Used to
select suitable defaults for the stub group size. */
unsigned int has_12bit_branch:1;
unsigned int has_17bit_branch:1;
unsigned int has_22bit_branch:1;
/* Set if we need a .plt stub to support lazy dynamic linking. */
unsigned int need_plt_stub:1;
/* Small local sym to section mapping cache. */
struct sym_sec_cache sym_sec;
};
/* Various hash macros and functions. */
#define hppa_link_hash_table(p) \
((struct elf32_hppa_link_hash_table *) ((p)->hash))
#define hppa_stub_hash_lookup(table, string, create, copy) \
((struct elf32_hppa_stub_hash_entry *) \
bfd_hash_lookup ((table), (string), (create), (copy)))
static struct bfd_hash_entry *stub_hash_newfunc
PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
static struct bfd_hash_entry *hppa_link_hash_newfunc
PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
static struct bfd_link_hash_table *elf32_hppa_link_hash_table_create
PARAMS ((bfd *));
static void elf32_hppa_link_hash_table_free
PARAMS ((struct bfd_link_hash_table *));
/* Stub handling functions. */
static char *hppa_stub_name
PARAMS ((const asection *, const asection *,
const struct elf32_hppa_link_hash_entry *,
const Elf_Internal_Rela *));
static struct elf32_hppa_stub_hash_entry *hppa_get_stub_entry
PARAMS ((const asection *, const asection *,
struct elf32_hppa_link_hash_entry *,
const Elf_Internal_Rela *,
struct elf32_hppa_link_hash_table *));
static struct elf32_hppa_stub_hash_entry *hppa_add_stub
PARAMS ((const char *, asection *, struct elf32_hppa_link_hash_table *));
static enum elf32_hppa_stub_type hppa_type_of_stub
PARAMS ((asection *, const Elf_Internal_Rela *,
struct elf32_hppa_link_hash_entry *, bfd_vma));
static bfd_boolean hppa_build_one_stub
PARAMS ((struct bfd_hash_entry *, PTR));
static bfd_boolean hppa_size_one_stub
PARAMS ((struct bfd_hash_entry *, PTR));
/* BFD and elf backend functions. */
static bfd_boolean elf32_hppa_object_p PARAMS ((bfd *));
static bfd_boolean elf32_hppa_add_symbol_hook
PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
const char **, flagword *, asection **, bfd_vma *));
static bfd_boolean elf32_hppa_create_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *));
static void elf32_hppa_copy_indirect_symbol
PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *,
struct elf_link_hash_entry *));
static bfd_boolean elf32_hppa_check_relocs
PARAMS ((bfd *, struct bfd_link_info *,
asection *, const Elf_Internal_Rela *));
static asection *elf32_hppa_gc_mark_hook
PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
struct elf_link_hash_entry *, Elf_Internal_Sym *));
static bfd_boolean elf32_hppa_gc_sweep_hook
PARAMS ((bfd *, struct bfd_link_info *,
asection *, const Elf_Internal_Rela *));
static void elf32_hppa_hide_symbol
PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean));
static bfd_boolean elf32_hppa_adjust_dynamic_symbol
PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
static bfd_boolean mark_PIC_calls
PARAMS ((struct elf_link_hash_entry *, PTR));
static bfd_boolean allocate_plt_static
PARAMS ((struct elf_link_hash_entry *, PTR));
static bfd_boolean allocate_dynrelocs
PARAMS ((struct elf_link_hash_entry *, PTR));
static bfd_boolean readonly_dynrelocs
PARAMS ((struct elf_link_hash_entry *, PTR));
static bfd_boolean clobber_millicode_symbols
PARAMS ((struct elf_link_hash_entry *, struct bfd_link_info *));
static bfd_boolean elf32_hppa_size_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *));
static void group_sections
PARAMS ((struct elf32_hppa_link_hash_table *, bfd_size_type, bfd_boolean));
static int get_local_syms
PARAMS ((bfd *, bfd *, struct bfd_link_info *));
static bfd_boolean elf32_hppa_final_link
PARAMS ((bfd *, struct bfd_link_info *));
static void hppa_record_segment_addr
PARAMS ((bfd *, asection *, PTR));
static bfd_reloc_status_type final_link_relocate
PARAMS ((asection *, bfd_byte *, const Elf_Internal_Rela *,
bfd_vma, struct elf32_hppa_link_hash_table *, asection *,
struct elf32_hppa_link_hash_entry *));
static bfd_boolean elf32_hppa_relocate_section
PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *,
bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
static bfd_boolean elf32_hppa_finish_dynamic_symbol
PARAMS ((bfd *, struct bfd_link_info *,
struct elf_link_hash_entry *, Elf_Internal_Sym *));
static enum elf_reloc_type_class elf32_hppa_reloc_type_class
PARAMS ((const Elf_Internal_Rela *));
static bfd_boolean elf32_hppa_finish_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *));
static void elf32_hppa_post_process_headers
PARAMS ((bfd *, struct bfd_link_info *));
static int elf32_hppa_elf_get_symbol_type
PARAMS ((Elf_Internal_Sym *, int));
/* Assorted hash table functions. */
/* Initialize an entry in the stub hash table. */
static struct bfd_hash_entry *
stub_hash_newfunc (entry, table, string)
struct bfd_hash_entry *entry;
struct bfd_hash_table *table;
const char *string;
{
/* Allocate the structure if it has not already been allocated by a
subclass. */
if (entry == NULL)
{
entry = bfd_hash_allocate (table,
sizeof (struct elf32_hppa_stub_hash_entry));
if (entry == NULL)
return entry;
}
/* Call the allocation method of the superclass. */
entry = bfd_hash_newfunc (entry, table, string);
if (entry != NULL)
{
struct elf32_hppa_stub_hash_entry *eh;
/* Initialize the local fields. */
eh = (struct elf32_hppa_stub_hash_entry *) entry;
eh->stub_sec = NULL;
eh->stub_offset = 0;
eh->target_value = 0;
eh->target_section = NULL;
eh->stub_type = hppa_stub_long_branch;
eh->h = NULL;
eh->id_sec = NULL;
}
return entry;
}
/* Initialize an entry in the link hash table. */
static struct bfd_hash_entry *
hppa_link_hash_newfunc (entry, table, string)
struct bfd_hash_entry *entry;
struct bfd_hash_table *table;
const char *string;
{
/* Allocate the structure if it has not already been allocated by a
subclass. */
if (entry == NULL)
{
entry = bfd_hash_allocate (table,
sizeof (struct elf32_hppa_link_hash_entry));
if (entry == NULL)
return entry;
}
/* Call the allocation method of the superclass. */
entry = _bfd_elf_link_hash_newfunc (entry, table, string);
if (entry != NULL)
{
struct elf32_hppa_link_hash_entry *eh;
/* Initialize the local fields. */
eh = (struct elf32_hppa_link_hash_entry *) entry;
eh->stub_cache = NULL;
eh->dyn_relocs = NULL;
eh->pic_call = 0;
eh->plabel = 0;
}
return entry;
}
/* Create the derived linker hash table. The PA ELF port uses the derived
hash table to keep information specific to the PA ELF linker (without
using static variables). */
static struct bfd_link_hash_table *
elf32_hppa_link_hash_table_create (abfd)
bfd *abfd;
{
struct elf32_hppa_link_hash_table *ret;
bfd_size_type amt = sizeof (*ret);
ret = (struct elf32_hppa_link_hash_table *) bfd_malloc (amt);
if (ret == NULL)
return NULL;
if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, hppa_link_hash_newfunc))
{
free (ret);
return NULL;
}
/* Init the stub hash table too. */
if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc))
return NULL;
ret->stub_bfd = NULL;
ret->add_stub_section = NULL;
ret->layout_sections_again = NULL;
ret->stub_group = NULL;
ret->sgot = NULL;
ret->srelgot = NULL;
ret->splt = NULL;
ret->srelplt = NULL;
ret->sdynbss = NULL;
ret->srelbss = NULL;
ret->text_segment_base = (bfd_vma) -1;
ret->data_segment_base = (bfd_vma) -1;
ret->multi_subspace = 0;
ret->has_12bit_branch = 0;
ret->has_17bit_branch = 0;
ret->has_22bit_branch = 0;
ret->need_plt_stub = 0;
ret->sym_sec.abfd = NULL;
return &ret->elf.root;
}
/* Free the derived linker hash table. */
static void
elf32_hppa_link_hash_table_free (hash)
struct bfd_link_hash_table *hash;
{
struct elf32_hppa_link_hash_table *ret
= (struct elf32_hppa_link_hash_table *) hash;
bfd_hash_table_free (&ret->stub_hash_table);
_bfd_generic_link_hash_table_free (hash);
}
/* Build a name for an entry in the stub hash table. */
static char *
hppa_stub_name (input_section, sym_sec, hash, rel)
const asection *input_section;
const asection *sym_sec;
const struct elf32_hppa_link_hash_entry *hash;
const Elf_Internal_Rela *rel;
{
char *stub_name;
bfd_size_type len;
if (hash)
{
len = 8 + 1 + strlen (hash->elf.root.root.string) + 1 + 8 + 1;
stub_name = bfd_malloc (len);
if (stub_name != NULL)
{
sprintf (stub_name, "%08x_%s+%x",
input_section->id & 0xffffffff,
hash->elf.root.root.string,
(int) rel->r_addend & 0xffffffff);
}
}
else
{
len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
stub_name = bfd_malloc (len);
if (stub_name != NULL)
{
sprintf (stub_name, "%08x_%x:%x+%x",
input_section->id & 0xffffffff,
sym_sec->id & 0xffffffff,
(int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
(int) rel->r_addend & 0xffffffff);
}
}
return stub_name;
}
/* Look up an entry in the stub hash. Stub entries are cached because
creating the stub name takes a bit of time. */
static struct elf32_hppa_stub_hash_entry *
hppa_get_stub_entry (input_section, sym_sec, hash, rel, htab)
const asection *input_section;
const asection *sym_sec;
struct elf32_hppa_link_hash_entry *hash;
const Elf_Internal_Rela *rel;
struct elf32_hppa_link_hash_table *htab;
{
struct elf32_hppa_stub_hash_entry *stub_entry;
const asection *id_sec;
/* If this input section is part of a group of sections sharing one
stub section, then use the id of the first section in the group.
Stub names need to include a section id, as there may well be
more than one stub used to reach say, printf, and we need to
distinguish between them. */
id_sec = htab->stub_group[input_section->id].link_sec;
if (hash != NULL && hash->stub_cache != NULL
&& hash->stub_cache->h == hash
&& hash->stub_cache->id_sec == id_sec)
{
stub_entry = hash->stub_cache;
}
else
{
char *stub_name;
stub_name = hppa_stub_name (id_sec, sym_sec, hash, rel);
if (stub_name == NULL)
return NULL;
stub_entry = hppa_stub_hash_lookup (&htab->stub_hash_table,
stub_name, FALSE, FALSE);
if (hash != NULL)
hash->stub_cache = stub_entry;
free (stub_name);
}
return stub_entry;
}
/* Add a new stub entry to the stub hash. Not all fields of the new
stub entry are initialised. */
static struct elf32_hppa_stub_hash_entry *
hppa_add_stub (stub_name, section, htab)
const char *stub_name;
asection *section;
struct elf32_hppa_link_hash_table *htab;
{
asection *link_sec;
asection *stub_sec;
struct elf32_hppa_stub_hash_entry *stub_entry;
link_sec = htab->stub_group[section->id].link_sec;
stub_sec = htab->stub_group[section->id].stub_sec;
if (stub_sec == NULL)
{
stub_sec = htab->stub_group[link_sec->id].stub_sec;
if (stub_sec == NULL)
{
size_t namelen;
bfd_size_type len;
char *s_name;
namelen = strlen (link_sec->name);
len = namelen + sizeof (STUB_SUFFIX);
s_name = bfd_alloc (htab->stub_bfd, len);
if (s_name == NULL)
return NULL;
memcpy (s_name, link_sec->name, namelen);
memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
stub_sec = (*htab->add_stub_section) (s_name, link_sec);
if (stub_sec == NULL)
return NULL;
htab->stub_group[link_sec->id].stub_sec = stub_sec;
}
htab->stub_group[section->id].stub_sec = stub_sec;
}
/* Enter this entry into the linker stub hash table. */
stub_entry = hppa_stub_hash_lookup (&htab->stub_hash_table, stub_name,
TRUE, FALSE);
if (stub_entry == NULL)
{
(*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
bfd_archive_filename (section->owner),
stub_name);
return NULL;
}
stub_entry->stub_sec = stub_sec;
stub_entry->stub_offset = 0;
stub_entry->id_sec = link_sec;
return stub_entry;
}
/* Determine the type of stub needed, if any, for a call. */
static enum elf32_hppa_stub_type
hppa_type_of_stub (input_sec, rel, hash, destination)
asection *input_sec;
const Elf_Internal_Rela *rel;
struct elf32_hppa_link_hash_entry *hash;
bfd_vma destination;
{
bfd_vma location;
bfd_vma branch_offset;
bfd_vma max_branch_offset;
unsigned int r_type;
if (hash != NULL
&& hash->elf.plt.offset != (bfd_vma) -1
&& (hash->elf.dynindx != -1 || hash->pic_call)
&& !hash->plabel)
{
/* We need an import stub. Decide between hppa_stub_import
and hppa_stub_import_shared later. */
return hppa_stub_import;
}
/* Determine where the call point is. */
location = (input_sec->output_offset
+ input_sec->output_section->vma
+ rel->r_offset);
branch_offset = destination - location - 8;
r_type = ELF32_R_TYPE (rel->r_info);
/* Determine if a long branch stub is needed. parisc branch offsets
are relative to the second instruction past the branch, ie. +8
bytes on from the branch instruction location. The offset is
signed and counts in units of 4 bytes. */
if (r_type == (unsigned int) R_PARISC_PCREL17F)
{
max_branch_offset = (1 << (17-1)) << 2;
}
else if (r_type == (unsigned int) R_PARISC_PCREL12F)
{
max_branch_offset = (1 << (12-1)) << 2;
}
else /* R_PARISC_PCREL22F. */
{
max_branch_offset = (1 << (22-1)) << 2;
}
if (branch_offset + max_branch_offset >= 2*max_branch_offset)
return hppa_stub_long_branch;
return hppa_stub_none;
}
/* Build one linker stub as defined by the stub hash table entry GEN_ENTRY.
IN_ARG contains the link info pointer. */
#define LDIL_R1 0x20200000 /* ldil LR'XXX,%r1 */
#define BE_SR4_R1 0xe0202002 /* be,n RR'XXX(%sr4,%r1) */
#define BL_R1 0xe8200000 /* b,l .+8,%r1 */
#define ADDIL_R1 0x28200000 /* addil LR'XXX,%r1,%r1 */
#define DEPI_R1 0xd4201c1e /* depi 0,31,2,%r1 */
#define ADDIL_DP 0x2b600000 /* addil LR'XXX,%dp,%r1 */
#define LDW_R1_R21 0x48350000 /* ldw RR'XXX(%sr0,%r1),%r21 */
#define BV_R0_R21 0xeaa0c000 /* bv %r0(%r21) */
#define LDW_R1_R19 0x48330000 /* ldw RR'XXX(%sr0,%r1),%r19 */
#define ADDIL_R19 0x2a600000 /* addil LR'XXX,%r19,%r1 */
#define LDW_R1_DP 0x483b0000 /* ldw RR'XXX(%sr0,%r1),%dp */
#define LDSID_R21_R1 0x02a010a1 /* ldsid (%sr0,%r21),%r1 */
#define MTSP_R1 0x00011820 /* mtsp %r1,%sr0 */
#define BE_SR0_R21 0xe2a00000 /* be 0(%sr0,%r21) */
#define STW_RP 0x6bc23fd1 /* stw %rp,-24(%sr0,%sp) */
#define BL22_RP 0xe800a002 /* b,l,n XXX,%rp */
#define BL_RP 0xe8400002 /* b,l,n XXX,%rp */
#define NOP 0x08000240 /* nop */
#define LDW_RP 0x4bc23fd1 /* ldw -24(%sr0,%sp),%rp */
#define LDSID_RP_R1 0x004010a1 /* ldsid (%sr0,%rp),%r1 */
#define BE_SR0_RP 0xe0400002 /* be,n 0(%sr0,%rp) */
#ifndef R19_STUBS
#define R19_STUBS 1
#endif
#if R19_STUBS
#define LDW_R1_DLT LDW_R1_R19
#else
#define LDW_R1_DLT LDW_R1_DP
#endif
static bfd_boolean
hppa_build_one_stub (gen_entry, in_arg)
struct bfd_hash_entry *gen_entry;
PTR in_arg;
{
struct elf32_hppa_stub_hash_entry *stub_entry;
struct bfd_link_info *info;
struct elf32_hppa_link_hash_table *htab;
asection *stub_sec;
bfd *stub_bfd;
bfd_byte *loc;
bfd_vma sym_value;
bfd_vma insn;
bfd_vma off;
int val;
int size;
/* Massage our args to the form they really have. */
stub_entry = (struct elf32_hppa_stub_hash_entry *) gen_entry;
info = (struct bfd_link_info *) in_arg;
htab = hppa_link_hash_table (info);
stub_sec = stub_entry->stub_sec;
/* Make a note of the offset within the stubs for this entry. */
stub_entry->stub_offset = stub_sec->_raw_size;
loc = stub_sec->contents + stub_entry->stub_offset;
stub_bfd = stub_sec->owner;
switch (stub_entry->stub_type)
{
case hppa_stub_long_branch:
/* Create the long branch. A long branch is formed with "ldil"
loading the upper bits of the target address into a register,
then branching with "be" which adds in the lower bits.
The "be" has its delay slot nullified. */
sym_value = (stub_entry->target_value
+ stub_entry->target_section->output_offset
+ stub_entry->target_section->output_section->vma);
val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_lrsel);
insn = hppa_rebuild_insn ((int) LDIL_R1, val, 21);
bfd_put_32 (stub_bfd, insn, loc);
val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_rrsel) >> 2;
insn = hppa_rebuild_insn ((int) BE_SR4_R1, val, 17);
bfd_put_32 (stub_bfd, insn, loc + 4);
size = 8;
break;
case hppa_stub_long_branch_shared:
/* Branches are relative. This is where we are going to. */
sym_value = (stub_entry->target_value
+ stub_entry->target_section->output_offset
+ stub_entry->target_section->output_section->vma);
/* And this is where we are coming from, more or less. */
sym_value -= (stub_entry->stub_offset
+ stub_sec->output_offset
+ stub_sec->output_section->vma);
bfd_put_32 (stub_bfd, (bfd_vma) BL_R1, loc);
val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_lrsel);
insn = hppa_rebuild_insn ((int) ADDIL_R1, val, 21);
bfd_put_32 (stub_bfd, insn, loc + 4);
val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_rrsel) >> 2;
insn = hppa_rebuild_insn ((int) BE_SR4_R1, val, 17);
bfd_put_32 (stub_bfd, insn, loc + 8);
size = 12;
break;
case hppa_stub_import:
case hppa_stub_import_shared:
off = stub_entry->h->elf.plt.offset;
if (off >= (bfd_vma) -2)
abort ();
off &= ~ (bfd_vma) 1;
sym_value = (off
+ htab->splt->output_offset
+ htab->splt->output_section->vma
- elf_gp (htab->splt->output_section->owner));
insn = ADDIL_DP;
#if R19_STUBS
if (stub_entry->stub_type == hppa_stub_import_shared)
insn = ADDIL_R19;
#endif
val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_lrsel),
insn = hppa_rebuild_insn ((int) insn, val, 21);
bfd_put_32 (stub_bfd, insn, loc);
/* It is critical to use lrsel/rrsel here because we are using
two different offsets (+0 and +4) from sym_value. If we use
lsel/rsel then with unfortunate sym_values we will round
sym_value+4 up to the next 2k block leading to a mis-match
between the lsel and rsel value. */
val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_rrsel);
insn = hppa_rebuild_insn ((int) LDW_R1_R21, val, 14);
bfd_put_32 (stub_bfd, insn, loc + 4);
if (htab->multi_subspace)
{
val = hppa_field_adjust (sym_value, (bfd_signed_vma) 4, e_rrsel);
insn = hppa_rebuild_insn ((int) LDW_R1_DLT, val, 14);
bfd_put_32 (stub_bfd, insn, loc + 8);
bfd_put_32 (stub_bfd, (bfd_vma) LDSID_R21_R1, loc + 12);
bfd_put_32 (stub_bfd, (bfd_vma) MTSP_R1, loc + 16);
bfd_put_32 (stub_bfd, (bfd_vma) BE_SR0_R21, loc + 20);
bfd_put_32 (stub_bfd, (bfd_vma) STW_RP, loc + 24);
size = 28;
}
else
{
bfd_put_32 (stub_bfd, (bfd_vma) BV_R0_R21, loc + 8);
val = hppa_field_adjust (sym_value, (bfd_signed_vma) 4, e_rrsel);
insn = hppa_rebuild_insn ((int) LDW_R1_DLT, val, 14);
bfd_put_32 (stub_bfd, insn, loc + 12);
size = 16;
}
if (!info->shared
&& stub_entry->h != NULL
&& stub_entry->h->pic_call)
{
/* Build the .plt entry needed to call a PIC function from
statically linked code. We don't need any relocs. */
bfd *dynobj;
struct elf32_hppa_link_hash_entry *eh;
bfd_vma value;
dynobj = htab->elf.dynobj;
eh = (struct elf32_hppa_link_hash_entry *) stub_entry->h;
if (eh->elf.root.type != bfd_link_hash_defined
&& eh->elf.root.type != bfd_link_hash_defweak)
abort ();
value = (eh->elf.root.u.def.value
+ eh->elf.root.u.def.section->output_offset
+ eh->elf.root.u.def.section->output_section->vma);
/* Fill in the entry in the procedure linkage table.
The format of a plt entry is
<funcaddr>
<__gp>. */
bfd_put_32 (htab->splt->owner, value,
htab->splt->contents + off);
value = elf_gp (htab->splt->output_section->owner);
bfd_put_32 (htab->splt->owner, value,
htab->splt->contents + off + 4);
}
break;
case hppa_stub_export:
/* Branches are relative. This is where we are going to. */
sym_value = (stub_entry->target_value
+ stub_entry->target_section->output_offset
+ stub_entry->target_section->output_section->vma);
/* And this is where we are coming from. */
sym_value -= (stub_entry->stub_offset
+ stub_sec->output_offset
+ stub_sec->output_section->vma);
if (sym_value - 8 + (1 << (17 + 1)) >= (1 << (17 + 2))
&& (!htab->has_22bit_branch
|| sym_value - 8 + (1 << (22 + 1)) >= (1 << (22 + 2))))
{
(*_bfd_error_handler)
(_("%s(%s+0x%lx): cannot reach %s, recompile with -ffunction-sections"),
bfd_archive_filename (stub_entry->target_section->owner),
stub_sec->name,
(long) stub_entry->stub_offset,
stub_entry->root.string);
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_fsel) >> 2;
if (!htab->has_22bit_branch)
insn = hppa_rebuild_insn ((int) BL_RP, val, 17);
else
insn = hppa_rebuild_insn ((int) BL22_RP, val, 22);
bfd_put_32 (stub_bfd, insn, loc);
bfd_put_32 (stub_bfd, (bfd_vma) NOP, loc + 4);
bfd_put_32 (stub_bfd, (bfd_vma) LDW_RP, loc + 8);
bfd_put_32 (stub_bfd, (bfd_vma) LDSID_RP_R1, loc + 12);
bfd_put_32 (stub_bfd, (bfd_vma) MTSP_R1, loc + 16);
bfd_put_32 (stub_bfd, (bfd_vma) BE_SR0_RP, loc + 20);
/* Point the function symbol at the stub. */
stub_entry->h->elf.root.u.def.section = stub_sec;
stub_entry->h->elf.root.u.def.value = stub_sec->_raw_size;
size = 24;
break;
default:
BFD_FAIL ();
return FALSE;
}
stub_sec->_raw_size += size;
return TRUE;
}
#undef LDIL_R1
#undef BE_SR4_R1
#undef BL_R1
#undef ADDIL_R1
#undef DEPI_R1
#undef ADDIL_DP
#undef LDW_R1_R21
#undef LDW_R1_DLT
#undef LDW_R1_R19
#undef ADDIL_R19
#undef LDW_R1_DP
#undef LDSID_R21_R1
#undef MTSP_R1
#undef BE_SR0_R21
#undef STW_RP
#undef BV_R0_R21
#undef BL_RP
#undef NOP
#undef LDW_RP
#undef LDSID_RP_R1
#undef BE_SR0_RP
/* As above, but don't actually build the stub. Just bump offset so
we know stub section sizes. */
static bfd_boolean
hppa_size_one_stub (gen_entry, in_arg)
struct bfd_hash_entry *gen_entry;
PTR in_arg;
{
struct elf32_hppa_stub_hash_entry *stub_entry;
struct elf32_hppa_link_hash_table *htab;
int size;
/* Massage our args to the form they really have. */
stub_entry = (struct elf32_hppa_stub_hash_entry *) gen_entry;
htab = (struct elf32_hppa_link_hash_table *) in_arg;
if (stub_entry->stub_type == hppa_stub_long_branch)
size = 8;
else if (stub_entry->stub_type == hppa_stub_long_branch_shared)
size = 12;
else if (stub_entry->stub_type == hppa_stub_export)
size = 24;
else /* hppa_stub_import or hppa_stub_import_shared. */
{
if (htab->multi_subspace)
size = 28;
else
size = 16;
}
stub_entry->stub_sec->_raw_size += size;
return TRUE;
}
/* Return nonzero if ABFD represents an HPPA ELF32 file.
Additionally we set the default architecture and machine. */
static bfd_boolean
elf32_hppa_object_p (abfd)
bfd *abfd;
{
Elf_Internal_Ehdr * i_ehdrp;
unsigned int flags;
i_ehdrp = elf_elfheader (abfd);
if (strcmp (bfd_get_target (abfd), "elf32-hppa-linux") == 0)
{
if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_LINUX)
return FALSE;
}
else
{
if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_HPUX)
return FALSE;
}
flags = i_ehdrp->e_flags;
switch (flags & (EF_PARISC_ARCH | EF_PARISC_WIDE))
{
case EFA_PARISC_1_0:
return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 10);
case EFA_PARISC_1_1:
return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 11);
case EFA_PARISC_2_0:
return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 20);
case EFA_PARISC_2_0 | EF_PARISC_WIDE:
return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 25);
}
return TRUE;
}
/* Undo the generic ELF code's subtraction of section->vma from the
value of each external symbol. */
static bfd_boolean
elf32_hppa_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
bfd *abfd ATTRIBUTE_UNUSED;
struct bfd_link_info *info ATTRIBUTE_UNUSED;
const Elf_Internal_Sym *sym ATTRIBUTE_UNUSED;
const char **namep ATTRIBUTE_UNUSED;
flagword *flagsp ATTRIBUTE_UNUSED;
asection **secp;
bfd_vma *valp;
{
*valp += (*secp)->vma;
return TRUE;
}
/* Create the .plt and .got sections, and set up our hash table
short-cuts to various dynamic sections. */
static bfd_boolean
elf32_hppa_create_dynamic_sections (abfd, info)
bfd *abfd;
struct bfd_link_info *info;
{
struct elf32_hppa_link_hash_table *htab;
/* Don't try to create the .plt and .got twice. */
htab = hppa_link_hash_table (info);
if (htab->splt != NULL)
return TRUE;
/* Call the generic code to do most of the work. */
if (! _bfd_elf_create_dynamic_sections (abfd, info))
return FALSE;
htab->splt = bfd_get_section_by_name (abfd, ".plt");
htab->srelplt = bfd_get_section_by_name (abfd, ".rela.plt");
htab->sgot = bfd_get_section_by_name (abfd, ".got");
htab->srelgot = bfd_make_section (abfd, ".rela.got");
if (htab->srelgot == NULL
|| ! bfd_set_section_flags (abfd, htab->srelgot,
(SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
| SEC_LINKER_CREATED
| SEC_READONLY))
|| ! bfd_set_section_alignment (abfd, htab->srelgot, 2))
return FALSE;
htab->sdynbss = bfd_get_section_by_name (abfd, ".dynbss");
htab->srelbss = bfd_get_section_by_name (abfd, ".rela.bss");
return TRUE;
}
/* Copy the extra info we tack onto an elf_link_hash_entry. */
static void
elf32_hppa_copy_indirect_symbol (bed, dir, ind)
struct elf_backend_data *bed;
struct elf_link_hash_entry *dir, *ind;
{
struct elf32_hppa_link_hash_entry *edir, *eind;
edir = (struct elf32_hppa_link_hash_entry *) dir;
eind = (struct elf32_hppa_link_hash_entry *) ind;
if (eind->dyn_relocs != NULL)
{
if (edir->dyn_relocs != NULL)
{
struct elf32_hppa_dyn_reloc_entry **pp;
struct elf32_hppa_dyn_reloc_entry *p;
if (ind->root.type == bfd_link_hash_indirect)
abort ();
/* Add reloc counts against the weak sym to the strong sym
list. Merge any entries against the same section. */
for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
{
struct elf32_hppa_dyn_reloc_entry *q;
for (q = edir->dyn_relocs; q != NULL; q = q->next)
if (q->sec == p->sec)
{
#if RELATIVE_DYNRELOCS
q->relative_count += p->relative_count;
#endif
q->count += p->count;
*pp = p->next;
break;
}
if (q == NULL)
pp = &p->next;
}
*pp = edir->dyn_relocs;
}
edir->dyn_relocs = eind->dyn_relocs;
eind->dyn_relocs = NULL;
}
_bfd_elf_link_hash_copy_indirect (bed, dir, ind);
}
/* Look through the relocs for a section during the first phase, and
calculate needed space in the global offset table, procedure linkage
table, and dynamic reloc sections. At this point we haven't
necessarily read all the input files. */
static bfd_boolean
elf32_hppa_check_relocs (abfd, info, sec, relocs)
bfd *abfd;
struct bfd_link_info *info;
asection *sec;
const Elf_Internal_Rela *relocs;
{
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
const Elf_Internal_Rela *rel;
const Elf_Internal_Rela *rel_end;
struct elf32_hppa_link_hash_table *htab;
asection *sreloc;
asection *stubreloc;
if (info->relocateable)
return TRUE;
htab = hppa_link_hash_table (info);
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (abfd);
sreloc = NULL;
stubreloc = NULL;
rel_end = relocs + sec->reloc_count;
for (rel = relocs; rel < rel_end; rel++)
{
enum {
NEED_GOT = 1,
NEED_PLT = 2,
NEED_DYNREL = 4,
PLT_PLABEL = 8
};
unsigned int r_symndx, r_type;
struct elf32_hppa_link_hash_entry *h;
int need_entry;
r_symndx = ELF32_R_SYM (rel->r_info);
if (r_symndx < symtab_hdr->sh_info)
h = NULL;
else
h = ((struct elf32_hppa_link_hash_entry *)
sym_hashes[r_symndx - symtab_hdr->sh_info]);
r_type = ELF32_R_TYPE (rel->r_info);
switch (r_type)
{
case R_PARISC_DLTIND14F:
case R_PARISC_DLTIND14R:
case R_PARISC_DLTIND21L:
/* This symbol requires a global offset table entry. */
need_entry = NEED_GOT;
/* Mark this section as containing PIC code. */
sec->flags |= SEC_HAS_GOT_REF;
break;
case R_PARISC_PLABEL14R: /* "Official" procedure labels. */
case R_PARISC_PLABEL21L:
case R_PARISC_PLABEL32:
/* If the addend is non-zero, we break badly. */
if (rel->r_addend != 0)
abort ();
/* If we are creating a shared library, then we need to
create a PLT entry for all PLABELs, because PLABELs with
local symbols may be passed via a pointer to another
object. Additionally, output a dynamic relocation
pointing to the PLT entry.
For executables, the original 32-bit ABI allowed two
different styles of PLABELs (function pointers): For
global functions, the PLABEL word points into the .plt
two bytes past a (function address, gp) pair, and for
local functions the PLABEL points directly at the
function. The magic +2 for the first type allows us to
differentiate between the two. As you can imagine, this
is a real pain when it comes to generating code to call
functions indirectly or to compare function pointers.
We avoid the mess by always pointing a PLABEL into the
.plt, even for local functions. */
need_entry = PLT_PLABEL | NEED_PLT | NEED_DYNREL;
break;
case R_PARISC_PCREL12F:
htab->has_12bit_branch = 1;
goto branch_common;
case R_PARISC_PCREL17C:
case R_PARISC_PCREL17F:
htab->has_17bit_branch = 1;
goto branch_common;
case R_PARISC_PCREL22F:
htab->has_22bit_branch = 1;
branch_common:
/* Function calls might need to go through the .plt, and
might require long branch stubs. */
if (h == NULL)
{
/* We know local syms won't need a .plt entry, and if
they need a long branch stub we can't guarantee that
we can reach the stub. So just flag an error later
if we're doing a shared link and find we need a long
branch stub. */
continue;
}
else
{
/* Global symbols will need a .plt entry if they remain
global, and in most cases won't need a long branch
stub. Unfortunately, we have to cater for the case
where a symbol is forced local by versioning, or due
to symbolic linking, and we lose the .plt entry. */
need_entry = NEED_PLT;
if (h->elf.type == STT_PARISC_MILLI)
need_entry = 0;
}
break;
case R_PARISC_SEGBASE: /* Used to set segment base. */
case R_PARISC_SEGREL32: /* Relative reloc, used for unwind. */
case R_PARISC_PCREL14F: /* PC relative load/store. */
case R_PARISC_PCREL14R:
case R_PARISC_PCREL17R: /* External branches. */
case R_PARISC_PCREL21L: /* As above, and for load/store too. */
/* We don't need to propagate the relocation if linking a
shared object since these are section relative. */
continue;
case R_PARISC_DPREL14F: /* Used for gp rel data load/store. */
case R_PARISC_DPREL14R:
case R_PARISC_DPREL21L:
if (info->shared)
{
(*_bfd_error_handler)
(_("%s: relocation %s can not be used when making a shared object; recompile with -fPIC"),
bfd_archive_filename (abfd),
elf_hppa_howto_table[r_type].name);
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
/* Fall through. */
case R_PARISC_DIR17F: /* Used for external branches. */
case R_PARISC_DIR17R:
case R_PARISC_DIR14F: /* Used for load/store from absolute locn. */
case R_PARISC_DIR14R:
case R_PARISC_DIR21L: /* As above, and for ext branches too. */
#if 0
/* Help debug shared library creation. Any of the above
relocs can be used in shared libs, but they may cause
pages to become unshared. */
if (info->shared)
{
(*_bfd_error_handler)
(_("%s: relocation %s should not be used when making a shared object; recompile with -fPIC"),
bfd_archive_filename (abfd),
elf_hppa_howto_table[r_type].name);
}
/* Fall through. */
#endif
case R_PARISC_DIR32: /* .word relocs. */
/* We may want to output a dynamic relocation later. */
need_entry = NEED_DYNREL;
break;
/* This relocation describes the C++ object vtable hierarchy.
Reconstruct it for later use during GC. */
case R_PARISC_GNU_VTINHERIT:
if (!_bfd_elf32_gc_record_vtinherit (abfd, sec,
&h->elf, rel->r_offset))
return FALSE;
continue;
/* This relocation describes which C++ vtable entries are actually
used. Record for later use during GC. */
case R_PARISC_GNU_VTENTRY:
if (!_bfd_elf32_gc_record_vtentry (abfd, sec,
&h->elf, rel->r_addend))
return FALSE;
continue;
default:
continue;
}
/* Now carry out our orders. */
if (need_entry & NEED_GOT)
{
/* Allocate space for a GOT entry, as well as a dynamic
relocation for this entry. */
if (htab->sgot == NULL)
{
if (htab->elf.dynobj == NULL)
htab->elf.dynobj = abfd;
if (!elf32_hppa_create_dynamic_sections (htab->elf.dynobj, info))
return FALSE;
}
if (h != NULL)
{
h->elf.got.refcount += 1;
}
else
{
bfd_signed_vma *local_got_refcounts;
/* This is a global offset table entry for a local symbol. */
local_got_refcounts = elf_local_got_refcounts (abfd);
if (local_got_refcounts == NULL)
{
bfd_size_type size;
/* Allocate space for local got offsets and local
plt offsets. Done this way to save polluting
elf_obj_tdata with another target specific
pointer. */
size = symtab_hdr->sh_info;
size *= 2 * sizeof (bfd_signed_vma);
local_got_refcounts = ((bfd_signed_vma *)
bfd_zalloc (abfd, size));
if (local_got_refcounts == NULL)
return FALSE;
elf_local_got_refcounts (abfd) = local_got_refcounts;
}
local_got_refcounts[r_symndx] += 1;
}
}
if (need_entry & NEED_PLT)
{
/* If we are creating a shared library, and this is a reloc
against a weak symbol or a global symbol in a dynamic
object, then we will be creating an import stub and a
.plt entry for the symbol. Similarly, on a normal link
to symbols defined in a dynamic object we'll need the
import stub and a .plt entry. We don't know yet whether
the symbol is defined or not, so make an entry anyway and
clean up later in adjust_dynamic_symbol. */
if ((sec->flags & SEC_ALLOC) != 0)
{
if (h != NULL)
{
h->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
h->elf.plt.refcount += 1;
/* If this .plt entry is for a plabel, mark it so
that adjust_dynamic_symbol will keep the entry
even if it appears to be local. */
if (need_entry & PLT_PLABEL)
h->plabel = 1;
}
else if (need_entry & PLT_PLABEL)
{
bfd_signed_vma *local_got_refcounts;
bfd_signed_vma *local_plt_refcounts;
local_got_refcounts = elf_local_got_refcounts (abfd);
if (local_got_refcounts == NULL)
{
bfd_size_type size;
/* Allocate space for local got offsets and local
plt offsets. */
size = symtab_hdr->sh_info;
size *= 2 * sizeof (bfd_signed_vma);
local_got_refcounts = ((bfd_signed_vma *)
bfd_zalloc (abfd, size));
if (local_got_refcounts == NULL)
return FALSE;
elf_local_got_refcounts (abfd) = local_got_refcounts;
}
local_plt_refcounts = (local_got_refcounts
+ symtab_hdr->sh_info);
local_plt_refcounts[r_symndx] += 1;
}
}
}
if (need_entry & NEED_DYNREL)
{
/* Flag this symbol as having a non-got, non-plt reference
so that we generate copy relocs if it turns out to be
dynamic. */
if (h != NULL && !info->shared)
h->elf.elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
/* If we are creating a shared library then we need to copy
the reloc into the shared library. However, if we are
linking with -Bsymbolic, we need only copy absolute
relocs or relocs against symbols that are not defined in
an object we are including in the link. PC- or DP- or
DLT-relative relocs against any local sym or global sym
with DEF_REGULAR set, can be discarded. At this point we
have not seen all the input files, so it is possible that
DEF_REGULAR is not set now but will be set later (it is
never cleared). We account for that possibility below by
storing information in the dyn_relocs field of the
hash table entry.
A similar situation to the -Bsymbolic case occurs when
creating shared libraries and symbol visibility changes
render the symbol local.
As it turns out, all the relocs we will be creating here
are absolute, so we cannot remove them on -Bsymbolic
links or visibility changes anyway. A STUB_REL reloc
is absolute too, as in that case it is the reloc in the
stub we will be creating, rather than copying the PCREL
reloc in the branch.
If on the other hand, we are creating an executable, we
may need to keep relocations for symbols satisfied by a
dynamic library if we manage to avoid copy relocs for the
symbol. */
if ((info->shared
&& (sec->flags & SEC_ALLOC) != 0
&& (IS_ABSOLUTE_RELOC (r_type)
|| (h != NULL
&& (!info->symbolic
|| h->elf.root.type == bfd_link_hash_defweak
|| (h->elf.elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR) == 0))))
|| (!info->shared
&& (sec->flags & SEC_ALLOC) != 0
&& h != NULL
&& (h->elf.root.type == bfd_link_hash_defweak
|| (h->elf.elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR) == 0)))
{
struct elf32_hppa_dyn_reloc_entry *p;
struct elf32_hppa_dyn_reloc_entry **head;
/* Create a reloc section in dynobj and make room for
this reloc. */
if (sreloc == NULL)
{
char *name;
bfd *dynobj;
name = (bfd_elf_string_from_elf_section
(abfd,
elf_elfheader (abfd)->e_shstrndx,
elf_section_data (sec)->rel_hdr.sh_name));
if (name == NULL)
{
(*_bfd_error_handler)
(_("Could not find relocation section for %s"),
sec->name);
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
if (htab->elf.dynobj == NULL)
htab->elf.dynobj = abfd;
dynobj = htab->elf.dynobj;
sreloc = bfd_get_section_by_name (dynobj, name);
if (sreloc == NULL)
{
flagword flags;
sreloc = bfd_make_section (dynobj, name);
flags = (SEC_HAS_CONTENTS | SEC_READONLY
| SEC_IN_MEMORY | SEC_LINKER_CREATED);
if ((sec->flags & SEC_ALLOC) != 0)
flags |= SEC_ALLOC | SEC_LOAD;
if (sreloc == NULL
|| !bfd_set_section_flags (dynobj, sreloc, flags)
|| !bfd_set_section_alignment (dynobj, sreloc, 2))
return FALSE;
}
elf_section_data (sec)->sreloc = sreloc;
}
/* If this is a global symbol, we count the number of
relocations we need for this symbol. */
if (h != NULL)
{
head = &h->dyn_relocs;
}
else
{
/* Track dynamic relocs needed for local syms too.
We really need local syms available to do this
easily. Oh well. */
asection *s;
s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
sec, r_symndx);
if (s == NULL)
return FALSE;
head = ((struct elf32_hppa_dyn_reloc_entry **)
&elf_section_data (s)->local_dynrel);
}
p = *head;
if (p == NULL || p->sec != sec)
{
p = ((struct elf32_hppa_dyn_reloc_entry *)
bfd_alloc (htab->elf.dynobj,
(bfd_size_type) sizeof *p));
if (p == NULL)
return FALSE;
p->next = *head;
*head = p;
p->sec = sec;
p->count = 0;
#if RELATIVE_DYNRELOCS
p->relative_count = 0;
#endif
}
p->count += 1;
#if RELATIVE_DYNRELOCS
if (!IS_ABSOLUTE_RELOC (rtype))
p->relative_count += 1;
#endif
}
}
}
return TRUE;
}
/* Return the section that should be marked against garbage collection
for a given relocation. */
static asection *
elf32_hppa_gc_mark_hook (sec, info, rel, h, sym)
asection *sec;
struct bfd_link_info *info ATTRIBUTE_UNUSED;
Elf_Internal_Rela *rel;
struct elf_link_hash_entry *h;
Elf_Internal_Sym *sym;
{
if (h != NULL)
{
switch ((unsigned int) ELF32_R_TYPE (rel->r_info))
{
case R_PARISC_GNU_VTINHERIT:
case R_PARISC_GNU_VTENTRY:
break;
default:
switch (h->root.type)
{
case bfd_link_hash_defined:
case bfd_link_hash_defweak:
return h->root.u.def.section;
case bfd_link_hash_common:
return h->root.u.c.p->section;
default:
break;
}
}
}
else
return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
return NULL;
}
/* Update the got and plt entry reference counts for the section being
removed. */
static bfd_boolean
elf32_hppa_gc_sweep_hook (abfd, info, sec, relocs)
bfd *abfd;
struct bfd_link_info *info ATTRIBUTE_UNUSED;
asection *sec;
const Elf_Internal_Rela *relocs;
{
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
bfd_signed_vma *local_got_refcounts;
bfd_signed_vma *local_plt_refcounts;
const Elf_Internal_Rela *rel, *relend;
elf_section_data (sec)->local_dynrel = NULL;
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (abfd);
local_got_refcounts = elf_local_got_refcounts (abfd);
local_plt_refcounts = local_got_refcounts;
if (local_plt_refcounts != NULL)
local_plt_refcounts += symtab_hdr->sh_info;
relend = relocs + sec->reloc_count;
for (rel = relocs; rel < relend; rel++)
{
unsigned long r_symndx;
unsigned int r_type;
struct elf_link_hash_entry *h = NULL;
r_symndx = ELF32_R_SYM (rel->r_info);
if (r_symndx >= symtab_hdr->sh_info)
{
struct elf32_hppa_link_hash_entry *eh;
struct elf32_hppa_dyn_reloc_entry **pp;
struct elf32_hppa_dyn_reloc_entry *p;
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
eh = (struct elf32_hppa_link_hash_entry *) h;
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
if (p->sec == sec)
{
/* Everything must go for SEC. */
*pp = p->next;
break;
}
}
r_type = ELF32_R_TYPE (rel->r_info);
switch (r_type)
{
case R_PARISC_DLTIND14F:
case R_PARISC_DLTIND14R:
case R_PARISC_DLTIND21L:
if (h != NULL)
{
if (h->got.refcount > 0)
h->got.refcount -= 1;
}
else if (local_got_refcounts != NULL)
{
if (local_got_refcounts[r_symndx] > 0)
local_got_refcounts[r_symndx] -= 1;
}
break;
case R_PARISC_PCREL12F:
case R_PARISC_PCREL17C:
case R_PARISC_PCREL17F:
case R_PARISC_PCREL22F:
if (h != NULL)
{
if (h->plt.refcount > 0)
h->plt.refcount -= 1;
}
break;
case R_PARISC_PLABEL14R:
case R_PARISC_PLABEL21L:
case R_PARISC_PLABEL32:
if (h != NULL)
{
if (h->plt.refcount > 0)
h->plt.refcount -= 1;
}
else if (local_plt_refcounts != NULL)
{
if (local_plt_refcounts[r_symndx] > 0)
local_plt_refcounts[r_symndx] -= 1;
}
break;
default:
break;
}
}
return TRUE;
}
/* Our own version of hide_symbol, so that we can keep plt entries for
plabels. */
static void
elf32_hppa_hide_symbol (info, h, force_local)
struct bfd_link_info *info;
struct elf_link_hash_entry *h;
bfd_boolean force_local;
{
if (force_local)
{
h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL;
if (h->dynindx != -1)
{
h->dynindx = -1;
_bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
h->dynstr_index);
}
}
if (! ((struct elf32_hppa_link_hash_entry *) h)->plabel)
{
h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
h->plt.offset = (bfd_vma) -1;
}
}
/* This is the condition under which elf32_hppa_finish_dynamic_symbol
will be called from elflink.h. If elflink.h doesn't call our
finish_dynamic_symbol routine, we'll need to do something about
initializing any .plt and .got entries in elf32_hppa_relocate_section. */
#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
((DYN) \
&& ((INFO)->shared \
|| ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
&& ((H)->dynindx != -1 \
|| ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
/* Adjust a symbol defined by a dynamic object and referenced by a
regular object. The current definition is in some section of the
dynamic object, but we're not including those sections. We have to
change the definition to something the rest of the link can
understand. */
static bfd_boolean
elf32_hppa_adjust_dynamic_symbol (info, h)
struct bfd_link_info *info;
struct elf_link_hash_entry *h;
{
struct elf32_hppa_link_hash_table *htab;
struct elf32_hppa_link_hash_entry *eh;
struct elf32_hppa_dyn_reloc_entry *p;
asection *s;
unsigned int power_of_two;
/* If this is a function, put it in the procedure linkage table. We
will fill in the contents of the procedure linkage table later. */
if (h->type == STT_FUNC
|| (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
{
if (h->plt.refcount <= 0
|| ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
&& h->root.type != bfd_link_hash_defweak
&& ! ((struct elf32_hppa_link_hash_entry *) h)->plabel
&& (!info->shared || info->symbolic)))
{
/* The .plt entry is not needed when:
a) Garbage collection has removed all references to the
symbol, or
b) We know for certain the symbol is defined in this
object, and it's not a weak definition, nor is the symbol
used by a plabel relocation. Either this object is the
application or we are doing a shared symbolic link. */
/* As a special sop to the hppa ABI, we keep a .plt entry
for functions in sections containing PIC code. */
if (!info->shared
&& h->plt.refcount > 0
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
&& (h->root.u.def.section->flags & SEC_HAS_GOT_REF) != 0)
((struct elf32_hppa_link_hash_entry *) h)->pic_call = 1;
else
{
h->plt.offset = (bfd_vma) -1;
h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
}
}
return TRUE;
}
else
h->plt.offset = (bfd_vma) -1;
/* If this is a weak symbol, and there is a real definition, the
processor independent code will have arranged for us to see the
real definition first, and we can just use the same value. */
if (h->weakdef != NULL)
{
if (h->weakdef->root.type != bfd_link_hash_defined
&& h->weakdef->root.type != bfd_link_hash_defweak)
abort ();
h->root.u.def.section = h->weakdef->root.u.def.section;
h->root.u.def.value = h->weakdef->root.u.def.value;
return TRUE;
}
/* This is a reference to a symbol defined by a dynamic object which
is not a function. */
/* If we are creating a shared library, we must presume that the
only references to the symbol are via the global offset table.
For such cases we need not do anything here; the relocations will
be handled correctly by relocate_section. */
if (info->shared)
return TRUE;
/* If there are no references to this symbol that do not use the
GOT, we don't need to generate a copy reloc. */
if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
return TRUE;
eh = (struct elf32_hppa_link_hash_entry *) h;
for (p = eh->dyn_relocs; p != NULL; p = p->next)
{
s = p->sec->output_section;
if (s != NULL && (s->flags & SEC_READONLY) != 0)
break;
}
/* If we didn't find any dynamic relocs in read-only sections, then
we'll be keeping the dynamic relocs and avoiding the copy reloc. */
if (p == NULL)
{
h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
return TRUE;
}
/* We must allocate the symbol in our .dynbss section, which will
become part of the .bss section of the executable. There will be
an entry for this symbol in the .dynsym section. The dynamic
object will contain position independent code, so all references
from the dynamic object to this symbol will go through the global
offset table. The dynamic linker will use the .dynsym entry to
determine the address it must put in the global offset table, so
both the dynamic object and the regular object will refer to the
same memory location for the variable. */
htab = hppa_link_hash_table (info);
/* We must generate a COPY reloc to tell the dynamic linker to
copy the initial value out of the dynamic object and into the
runtime process image. */
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
{
htab->srelbss->_raw_size += sizeof (Elf32_External_Rela);
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
}
/* We need to figure out the alignment required for this symbol. I
have no idea how other ELF linkers handle this. */
power_of_two = bfd_log2 (h->size);
if (power_of_two > 3)
power_of_two = 3;
/* Apply the required alignment. */
s = htab->sdynbss;
s->_raw_size = BFD_ALIGN (s->_raw_size,
(bfd_size_type) (1 << power_of_two));
if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
{
if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
return FALSE;
}
/* Define the symbol as being at this point in the section. */
h->root.u.def.section = s;
h->root.u.def.value = s->_raw_size;
/* Increment the section size to make room for the symbol. */
s->_raw_size += h->size;
return TRUE;
}
/* Called via elf_link_hash_traverse to create .plt entries for an
application that uses statically linked PIC functions. Similar to
the first part of elf32_hppa_adjust_dynamic_symbol. */
static bfd_boolean
mark_PIC_calls (h, inf)
struct elf_link_hash_entry *h;
PTR inf ATTRIBUTE_UNUSED;
{
if (h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
if (! (h->plt.refcount > 0
&& (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
&& (h->root.u.def.section->flags & SEC_HAS_GOT_REF) != 0))
{
h->plt.offset = (bfd_vma) -1;
h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
return TRUE;
}
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
((struct elf32_hppa_link_hash_entry *) h)->pic_call = 1;
return TRUE;
}
/* Allocate space in the .plt for entries that won't have relocations.
ie. pic_call and plabel entries. */
static bfd_boolean
allocate_plt_static (h, inf)
struct elf_link_hash_entry *h;
PTR inf;
{
struct bfd_link_info *info;
struct elf32_hppa_link_hash_table *htab;
asection *s;
if (h->root.type == bfd_link_hash_indirect)
return TRUE;
if (h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
info = (struct bfd_link_info *) inf;
htab = hppa_link_hash_table (info);
if (((struct elf32_hppa_link_hash_entry *) h)->pic_call)
{
/* Make an entry in the .plt section for non-pic code that is
calling pic code. */
((struct elf32_hppa_link_hash_entry *) h)->plabel = 0;
s = htab->splt;
h->plt.offset = s->_raw_size;
s->_raw_size += PLT_ENTRY_SIZE;
}
else if (htab->elf.dynamic_sections_created
&& h->plt.refcount > 0)
{
/* Make sure this symbol is output as a dynamic symbol.
Undefined weak syms won't yet be marked as dynamic. */
if (h->dynindx == -1
&& (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
&& h->type != STT_PARISC_MILLI)
{
if (! bfd_elf32_link_record_dynamic_symbol (info, h))
return FALSE;
}
if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h))
{
/* Allocate these later. From this point on, h->plabel
means that the plt entry is only used by a plabel.
We'll be using a normal plt entry for this symbol, so
clear the plabel indicator. */
((struct elf32_hppa_link_hash_entry *) h)->plabel = 0;
}
else if (((struct elf32_hppa_link_hash_entry *) h)->plabel)
{
/* Make an entry in the .plt section for plabel references
that won't have a .plt entry for other reasons. */
s = htab->splt;
h->plt.offset = s->_raw_size;
s->_raw_size += PLT_ENTRY_SIZE;
}
else
{
/* No .plt entry needed. */
h->plt.offset = (bfd_vma) -1;
h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
}
}
else
{
h->plt.offset = (bfd_vma) -1;
h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
}
return TRUE;
}
/* Allocate space in .plt, .got and associated reloc sections for
global syms. */
static bfd_boolean
allocate_dynrelocs (h, inf)
struct elf_link_hash_entry *h;
PTR inf;
{
struct bfd_link_info *info;
struct elf32_hppa_link_hash_table *htab;
asection *s;
struct elf32_hppa_link_hash_entry *eh;
struct elf32_hppa_dyn_reloc_entry *p;
if (h->root.type == bfd_link_hash_indirect)
return TRUE;
if (h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
info = (struct bfd_link_info *) inf;
htab = hppa_link_hash_table (info);
if (htab->elf.dynamic_sections_created
&& h->plt.offset != (bfd_vma) -1
&& !((struct elf32_hppa_link_hash_entry *) h)->pic_call
&& !((struct elf32_hppa_link_hash_entry *) h)->plabel)
{
/* Make an entry in the .plt section. */
s = htab->splt;
h->plt.offset = s->_raw_size;
s->_raw_size += PLT_ENTRY_SIZE;
/* We also need to make an entry in the .rela.plt section. */
htab->srelplt->_raw_size += sizeof (Elf32_External_Rela);
htab->need_plt_stub = 1;
}
if (h->got.refcount > 0)
{
/* Make sure this symbol is output as a dynamic symbol.
Undefined weak syms won't yet be marked as dynamic. */
if (h->dynindx == -1
&& (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
&& h->type != STT_PARISC_MILLI)
{
if (! bfd_elf32_link_record_dynamic_symbol (info, h))
return FALSE;
}
s = htab->sgot;
h->got.offset = s->_raw_size;
s->_raw_size += GOT_ENTRY_SIZE;
if (htab->elf.dynamic_sections_created
&& (info->shared
|| (h->dynindx != -1
&& h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0))
{
htab->srelgot->_raw_size += sizeof (Elf32_External_Rela);
}
}
else
h->got.offset = (bfd_vma) -1;
eh = (struct elf32_hppa_link_hash_entry *) h;
if (eh->dyn_relocs == NULL)
return TRUE;
/* If this is a -Bsymbolic shared link, then we need to discard all
space allocated for dynamic pc-relative relocs against symbols
defined in a regular object. For the normal shared case, discard
space for relocs that have become local due to symbol visibility
changes. */
if (info->shared)
{
#if RELATIVE_DYNRELOCS
if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
&& ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
|| info->symbolic))
{
struct elf32_hppa_dyn_reloc_entry **pp;
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
{
p->count -= p->relative_count;
p->relative_count = 0;
if (p->count == 0)
*pp = p->next;
else
pp = &p->next;
}
}
#endif
}
else
{
/* For the non-shared case, discard space for relocs against
symbols which turn out to need copy relocs or are not
dynamic. */
if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
&& (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
|| (htab->elf.dynamic_sections_created
&& (h->root.type == bfd_link_hash_undefweak
|| h->root.type == bfd_link_hash_undefined))))
{
/* Make sure this symbol is output as a dynamic symbol.
Undefined weak syms won't yet be marked as dynamic. */
if (h->dynindx == -1
&& (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
&& h->type != STT_PARISC_MILLI)
{
if (! bfd_elf32_link_record_dynamic_symbol (info, h))
return FALSE;
}
/* If that succeeded, we know we'll be keeping all the
relocs. */
if (h->dynindx != -1)
goto keep;
}
eh->dyn_relocs = NULL;
return TRUE;
keep: ;
}
/* Finally, allocate space. */
for (p = eh->dyn_relocs; p != NULL; p = p->next)
{
asection *sreloc = elf_section_data (p->sec)->sreloc;
sreloc->_raw_size += p->count * sizeof (Elf32_External_Rela);
}
return TRUE;
}
/* This function is called via elf_link_hash_traverse to force
millicode symbols local so they do not end up as globals in the
dynamic symbol table. We ought to be able to do this in
adjust_dynamic_symbol, but our adjust_dynamic_symbol is not called
for all dynamic symbols. Arguably, this is a bug in
elf_adjust_dynamic_symbol. */
static bfd_boolean
clobber_millicode_symbols (h, info)
struct elf_link_hash_entry *h;
struct bfd_link_info *info;
{
if (h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
if (h->type == STT_PARISC_MILLI
&& (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
{
elf32_hppa_hide_symbol (info, h, TRUE);
}
return TRUE;
}
/* Find any dynamic relocs that apply to read-only sections. */
static bfd_boolean
readonly_dynrelocs (h, inf)
struct elf_link_hash_entry *h;
PTR inf;
{
struct elf32_hppa_link_hash_entry *eh;
struct elf32_hppa_dyn_reloc_entry *p;
if (h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
eh = (struct elf32_hppa_link_hash_entry *) h;
for (p = eh->dyn_relocs; p != NULL; p = p->next)
{
asection *s = p->sec->output_section;
if (s != NULL && (s->flags & SEC_READONLY) != 0)
{
struct bfd_link_info *info = (struct bfd_link_info *) inf;
info->flags |= DF_TEXTREL;
/* Not an error, just cut short the traversal. */
return FALSE;
}
}
return TRUE;
}
/* Set the sizes of the dynamic sections. */
static bfd_boolean
elf32_hppa_size_dynamic_sections (output_bfd, info)
bfd *output_bfd ATTRIBUTE_UNUSED;
struct bfd_link_info *info;
{
struct elf32_hppa_link_hash_table *htab;
bfd *dynobj;
bfd *ibfd;
asection *s;
bfd_boolean relocs;
htab = hppa_link_hash_table (info);
dynobj = htab->elf.dynobj;
if (dynobj == NULL)
abort ();
if (htab->elf.dynamic_sections_created)
{
/* Set the contents of the .interp section to the interpreter. */
if (! info->shared)
{
s = bfd_get_section_by_name (dynobj, ".interp");
if (s == NULL)
abort ();
s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
}
/* Force millicode symbols local. */
elf_link_hash_traverse (&htab->elf,
clobber_millicode_symbols,
info);
}
else
{
/* Run through the function symbols, looking for any that are
PIC, and mark them as needing .plt entries so that %r19 will
be set up. */
if (! info->shared)
elf_link_hash_traverse (&htab->elf, mark_PIC_calls, (PTR) info);
}
/* Set up .got and .plt offsets for local syms, and space for local
dynamic relocs. */
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
{
bfd_signed_vma *local_got;
bfd_signed_vma *end_local_got;
bfd_signed_vma *local_plt;
bfd_signed_vma *end_local_plt;
bfd_size_type locsymcount;
Elf_Internal_Shdr *symtab_hdr;
asection *srel;
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
continue;
for (s = ibfd->sections; s != NULL; s = s->next)
{
struct elf32_hppa_dyn_reloc_entry *p;
for (p = ((struct elf32_hppa_dyn_reloc_entry *)
elf_section_data (s)->local_dynrel);
p != NULL;
p = p->next)
{
if (!bfd_is_abs_section (p->sec)
&& bfd_is_abs_section (p->sec->output_section))
{
/* Input section has been discarded, either because
it is a copy of a linkonce section or due to
linker script /DISCARD/, so we'll be discarding
the relocs too. */
}
else if (p->count != 0)
{
srel = elf_section_data (p->sec)->sreloc;
srel->_raw_size += p->count * sizeof (Elf32_External_Rela);
if ((p->sec->output_section->flags & SEC_READONLY) != 0)
info->flags |= DF_TEXTREL;
}
}
}
local_got = elf_local_got_refcounts (ibfd);
if (!local_got)
continue;
symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
locsymcount = symtab_hdr->sh_info;
end_local_got = local_got + locsymcount;
s = htab->sgot;
srel = htab->srelgot;
for (; local_got < end_local_got; ++local_got)
{
if (*local_got > 0)
{
*local_got = s->_raw_size;
s->_raw_size += GOT_ENTRY_SIZE;
if (info->shared)
srel->_raw_size += sizeof (Elf32_External_Rela);
}
else
*local_got = (bfd_vma) -1;
}
local_plt = end_local_got;
end_local_plt = local_plt + locsymcount;
if (! htab->elf.dynamic_sections_created)
{
/* Won't be used, but be safe. */
for (; local_plt < end_local_plt; ++local_plt)
*local_plt = (bfd_vma) -1;
}
else
{
s = htab->splt;
srel = htab->srelplt;
for (; local_plt < end_local_plt; ++local_plt)
{
if (*local_plt > 0)
{
*local_plt = s->_raw_size;
s->_raw_size += PLT_ENTRY_SIZE;
if (info->shared)
srel->_raw_size += sizeof (Elf32_External_Rela);
}
else
*local_plt = (bfd_vma) -1;
}
}
}
/* Do all the .plt entries without relocs first. The dynamic linker
uses the last .plt reloc to find the end of the .plt (and hence
the start of the .got) for lazy linking. */
elf_link_hash_traverse (&htab->elf, allocate_plt_static, (PTR) info);
/* Allocate global sym .plt and .got entries, and space for global
sym dynamic relocs. */
elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
/* The check_relocs and adjust_dynamic_symbol entry points have
determined the sizes of the various dynamic sections. Allocate
memory for them. */
relocs = FALSE;
for (s = dynobj->sections; s != NULL; s = s->next)
{
if ((s->flags & SEC_LINKER_CREATED) == 0)
continue;
if (s == htab->splt)
{
if (htab->need_plt_stub)
{
/* Make space for the plt stub at the end of the .plt
section. We want this stub right at the end, up
against the .got section. */
int gotalign = bfd_section_alignment (dynobj, htab->sgot);
int pltalign = bfd_section_alignment (dynobj, s);
bfd_size_type mask;
if (gotalign > pltalign)
bfd_set_section_alignment (dynobj, s, gotalign);
mask = ((bfd_size_type) 1 << gotalign) - 1;
s->_raw_size = (s->_raw_size + sizeof (plt_stub) + mask) & ~mask;
}
}
else if (s == htab->sgot)
;
else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
{
if (s->_raw_size != 0)
{
/* Remember whether there are any reloc sections other
than .rela.plt. */
if (s != htab->srelplt)
relocs = TRUE;
/* We use the reloc_count field as a counter if we need
to copy relocs into the output file. */
s->reloc_count = 0;
}
}
else
{
/* It's not one of our sections, so don't allocate space. */
continue;
}
if (s->_raw_size == 0)
{
/* If we don't need this section, strip it from the
output file. This is mostly to handle .rela.bss and
.rela.plt. We must create both sections in
create_dynamic_sections, because they must be created
before the linker maps input sections to output
sections. The linker does that before
adjust_dynamic_symbol is called, and it is that
function which decides whether anything needs to go
into these sections. */
_bfd_strip_section_from_output (info, s);
continue;
}
/* Allocate memory for the section contents. Zero it, because
we may not fill in all the reloc sections. */
s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
if (s->contents == NULL && s->_raw_size != 0)
return FALSE;
}
if (htab->elf.dynamic_sections_created)
{
/* Like IA-64 and HPPA64, always create a DT_PLTGOT. It
actually has nothing to do with the PLT, it is how we
communicate the LTP value of a load module to the dynamic
linker. */
#define add_dynamic_entry(TAG, VAL) \
bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
if (!add_dynamic_entry (DT_PLTGOT, 0))
return FALSE;
/* Add some entries to the .dynamic section. We fill in the
values later, in elf32_hppa_finish_dynamic_sections, but we
must add the entries now so that we get the correct size for
the .dynamic section. The DT_DEBUG entry is filled in by the
dynamic linker and used by the debugger. */
if (!info->shared)
{
if (!add_dynamic_entry (DT_DEBUG, 0))
return FALSE;
}
if (htab->srelplt->_raw_size != 0)
{
if (!add_dynamic_entry (DT_PLTRELSZ, 0)
|| !add_dynamic_entry (DT_PLTREL, DT_RELA)
|| !add_dynamic_entry (DT_JMPREL, 0))
return FALSE;
}
if (relocs)
{
if (!add_dynamic_entry (DT_RELA, 0)
|| !add_dynamic_entry (DT_RELASZ, 0)
|| !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
return FALSE;
/* If any dynamic relocs apply to a read-only section,
then we need a DT_TEXTREL entry. */
if ((info->flags & DF_TEXTREL) == 0)
elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
(PTR) info);
if ((info->flags & DF_TEXTREL) != 0)
{
if (!add_dynamic_entry (DT_TEXTREL, 0))
return FALSE;
}
}
}
#undef add_dynamic_entry
return TRUE;
}
/* External entry points for sizing and building linker stubs. */
/* Set up various things so that we can make a list of input sections
for each output section included in the link. Returns -1 on error,
0 when no stubs will be needed, and 1 on success. */
int
elf32_hppa_setup_section_lists (output_bfd, info)
bfd *output_bfd;
struct bfd_link_info *info;
{
bfd *input_bfd;
unsigned int bfd_count;
int top_id, top_index;
asection *section;
asection **input_list, **list;
bfd_size_type amt;
struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info);
if (htab->elf.root.creator->flavour != bfd_target_elf_flavour)
return 0;
/* Count the number of input BFDs and find the top input section id. */
for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
input_bfd != NULL;
input_bfd = input_bfd->link_next)
{
bfd_count += 1;
for (section = input_bfd->sections;
section != NULL;
section = section->next)
{
if (top_id < section->id)
top_id = section->id;
}
}
htab->bfd_count = bfd_count;
amt = sizeof (struct map_stub) * (top_id + 1);
htab->stub_group = (struct map_stub *) bfd_zmalloc (amt);
if (htab->stub_group == NULL)
return -1;
/* We can't use output_bfd->section_count here to find the top output
section index as some sections may have been removed, and
_bfd_strip_section_from_output doesn't renumber the indices. */
for (section = output_bfd->sections, top_index = 0;
section != NULL;
section = section->next)
{
if (top_index < section->index)
top_index = section->index;
}
htab->top_index = top_index;
amt = sizeof (asection *) * (top_index + 1);
input_list = (asection **) bfd_malloc (amt);
htab->input_list = input_list;
if (input_list == NULL)
return -1;
/* For sections we aren't interested in, mark their entries with a
value we can check later. */
list = input_list + top_index;
do
*list = bfd_abs_section_ptr;
while (list-- != input_list);
for (section = output_bfd->sections;
section != NULL;
section = section->next)
{
if ((section->flags & SEC_CODE) != 0)
input_list[section->index] = NULL;
}
return 1;
}
/* The linker repeatedly calls this function for each input section,
in the order that input sections are linked into output sections.
Build lists of input sections to determine groupings between which
we may insert linker stubs. */
void
elf32_hppa_next_input_section (info, isec)
struct bfd_link_info *info;
asection *isec;
{
struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info);
if (isec->output_section->index <= htab->top_index)
{
asection **list = htab->input_list + isec->output_section->index;
if (*list != bfd_abs_section_ptr)
{
/* Steal the link_sec pointer for our list. */
#define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
/* This happens to make the list in reverse order,
which is what we want. */
PREV_SEC (isec) = *list;
*list = isec;
}
}
}
/* See whether we can group stub sections together. Grouping stub
sections may result in fewer stubs. More importantly, we need to
put all .init* and .fini* stubs at the beginning of the .init or
.fini output sections respectively, because glibc splits the
_init and _fini functions into multiple parts. Putting a stub in
the middle of a function is not a good idea. */
static void
group_sections (htab, stub_group_size, stubs_always_before_branch)
struct elf32_hppa_link_hash_table *htab;
bfd_size_type stub_group_size;
bfd_boolean stubs_always_before_branch;
{
asection **list = htab->input_list + htab->top_index;
do
{
asection *tail = *list;
if (tail == bfd_abs_section_ptr)
continue;
while (tail != NULL)
{
asection *curr;
asection *prev;
bfd_size_type total;
bfd_boolean big_sec;
curr = tail;
if (tail->_cooked_size)
total = tail->_cooked_size;
else
total = tail->_raw_size;
big_sec = total >= stub_group_size;
while ((prev = PREV_SEC (curr)) != NULL
&& ((total += curr->output_offset - prev->output_offset)
< stub_group_size))
curr = prev;
/* OK, the size from the start of CURR to the end is less
than 240000 bytes and thus can be handled by one stub
section. (or the tail section is itself larger than
240000 bytes, in which case we may be toast.)
We should really be keeping track of the total size of
stubs added here, as stubs contribute to the final output
section size. That's a little tricky, and this way will
only break if stubs added total more than 22144 bytes, or
2768 long branch stubs. It seems unlikely for more than
2768 different functions to be called, especially from
code only 240000 bytes long. This limit used to be
250000, but c++ code tends to generate lots of little
functions, and sometimes violated the assumption. */
do
{
prev = PREV_SEC (tail);
/* Set up this stub group. */
htab->stub_group[tail->id].link_sec = curr;
}
while (tail != curr && (tail = prev) != NULL);
/* But wait, there's more! Input sections up to 240000
bytes before the stub section can be handled by it too.
Don't do this if we have a really large section after the
stubs, as adding more stubs increases the chance that
branches may not reach into the stub section. */
if (!stubs_always_before_branch && !big_sec)
{
total = 0;
while (prev != NULL
&& ((total += tail->output_offset - prev->output_offset)
< stub_group_size))
{
tail = prev;
prev = PREV_SEC (tail);
htab->stub_group[tail->id].link_sec = curr;
}
}
tail = prev;
}
}
while (list-- != htab->input_list);
free (htab->input_list);
#undef PREV_SEC
}
/* Read in all local syms for all input bfds, and create hash entries
for export stubs if we are building a multi-subspace shared lib.
Returns -1 on error, 1 if export stubs created, 0 otherwise. */
static int
get_local_syms (output_bfd, input_bfd, info)
bfd *output_bfd;
bfd *input_bfd;
struct bfd_link_info *info;
{
unsigned int bfd_indx;
Elf_Internal_Sym *local_syms, **all_local_syms;
int stub_changed = 0;
struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info);
/* We want to read in symbol extension records only once. To do this
we need to read in the local symbols in parallel and save them for
later use; so hold pointers to the local symbols in an array. */
bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
all_local_syms = (Elf_Internal_Sym **) bfd_zmalloc (amt);
htab->all_local_syms = all_local_syms;
if (all_local_syms == NULL)
return -1;
/* Walk over all the input BFDs, swapping in local symbols.
If we are creating a shared library, create hash entries for the
export stubs. */
for (bfd_indx = 0;
input_bfd != NULL;
input_bfd = input_bfd->link_next, bfd_indx++)
{
Elf_Internal_Shdr *symtab_hdr;
/* We'll need the symbol table in a second. */
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
if (symtab_hdr->sh_info == 0)
continue;
/* We need an array of the local symbols attached to the input bfd. */
local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
if (local_syms == NULL)
{
local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
symtab_hdr->sh_info, 0,
NULL, NULL, NULL);
/* Cache them for elf_link_input_bfd. */
symtab_hdr->contents = (unsigned char *) local_syms;
}
if (local_syms == NULL)
return -1;
all_local_syms[bfd_indx] = local_syms;
if (info->shared && htab->multi_subspace)
{
struct elf_link_hash_entry **sym_hashes;
struct elf_link_hash_entry **end_hashes;
unsigned int symcount;
symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
- symtab_hdr->sh_info);
sym_hashes = elf_sym_hashes (input_bfd);
end_hashes = sym_hashes + symcount;
/* Look through the global syms for functions; We need to
build export stubs for all globally visible functions. */
for (; sym_hashes < end_hashes; sym_hashes++)
{
struct elf32_hppa_link_hash_entry *hash;
hash = (struct elf32_hppa_link_hash_entry *) *sym_hashes;
while (hash->elf.root.type == bfd_link_hash_indirect
|| hash->elf.root.type == bfd_link_hash_warning)
hash = ((struct elf32_hppa_link_hash_entry *)
hash->elf.root.u.i.link);
/* At this point in the link, undefined syms have been
resolved, so we need to check that the symbol was
defined in this BFD. */
if ((hash->elf.root.type == bfd_link_hash_defined
|| hash->elf.root.type == bfd_link_hash_defweak)
&& hash->elf.type == STT_FUNC
&& hash->elf.root.u.def.section->output_section != NULL
&& (hash->elf.root.u.def.section->output_section->owner
== output_bfd)
&& hash->elf.root.u.def.section->owner == input_bfd
&& (hash->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)
&& !(hash->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)
&& ELF_ST_VISIBILITY (hash->elf.other) == STV_DEFAULT)
{
asection *sec;
const char *stub_name;
struct elf32_hppa_stub_hash_entry *stub_entry;
sec = hash->elf.root.u.def.section;
stub_name = hash->elf.root.root.string;
stub_entry = hppa_stub_hash_lookup (&htab->stub_hash_table,
stub_name,
FALSE, FALSE);
if (stub_entry == NULL)
{
stub_entry = hppa_add_stub (stub_name, sec, htab);
if (!stub_entry)
return -1;
stub_entry->target_value = hash->elf.root.u.def.value;
stub_entry->target_section = hash->elf.root.u.def.section;
stub_entry->stub_type = hppa_stub_export;
stub_entry->h = hash;
stub_changed = 1;
}
else
{
(*_bfd_error_handler) (_("%s: duplicate export stub %s"),
bfd_archive_filename (input_bfd),
stub_name);
}
}
}
}
}
return stub_changed;
}
/* Determine and set the size of the stub section for a final link.
The basic idea here is to examine all the relocations looking for
PC-relative calls to a target that is unreachable with a "bl"
instruction. */
bfd_boolean
elf32_hppa_size_stubs (output_bfd, stub_bfd, info, multi_subspace, group_size,
add_stub_section, layout_sections_again)
bfd *output_bfd;
bfd *stub_bfd;
struct bfd_link_info *info;
bfd_boolean multi_subspace;
bfd_signed_vma group_size;
asection * (*add_stub_section) PARAMS ((const char *, asection *));
void (*layout_sections_again) PARAMS ((void));
{
bfd_size_type stub_group_size;
bfd_boolean stubs_always_before_branch;
bfd_boolean stub_changed;
struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info);
/* Stash our params away. */
htab->stub_bfd = stub_bfd;
htab->multi_subspace = multi_subspace;
htab->add_stub_section = add_stub_section;
htab->layout_sections_again = layout_sections_again;
stubs_always_before_branch = group_size < 0;
if (group_size < 0)
stub_group_size = -group_size;
else
stub_group_size = group_size;
if (stub_group_size == 1)
{
/* Default values. */
if (stubs_always_before_branch)
{
stub_group_size = 7680000;
if (htab->has_17bit_branch || htab->multi_subspace)
stub_group_size = 240000;
if (htab->has_12bit_branch)
stub_group_size = 7500;
}
else
{
stub_group_size = 6971392;
if (htab->has_17bit_branch || htab->multi_subspace)
stub_group_size = 217856;
if (htab->has_12bit_branch)
stub_group_size = 6808;
}
}
group_sections (htab, stub_group_size, stubs_always_before_branch);
switch (get_local_syms (output_bfd, info->input_bfds, info))
{
default:
if (htab->all_local_syms)
goto error_ret_free_local;
return FALSE;
case 0:
stub_changed = FALSE;
break;
case 1:
stub_changed = TRUE;
break;
}
while (1)
{
bfd *input_bfd;
unsigned int bfd_indx;
asection *stub_sec;
for (input_bfd = info->input_bfds, bfd_indx = 0;
input_bfd != NULL;
input_bfd = input_bfd->link_next, bfd_indx++)
{
Elf_Internal_Shdr *symtab_hdr;
asection *section;
Elf_Internal_Sym *local_syms;
/* We'll need the symbol table in a second. */
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
if (symtab_hdr->sh_info == 0)
continue;
local_syms = htab->all_local_syms[bfd_indx];
/* Walk over each section attached to the input bfd. */
for (section = input_bfd->sections;
section != NULL;
section = section->next)
{
Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
/* If there aren't any relocs, then there's nothing more
to do. */
if ((section->flags & SEC_RELOC) == 0
|| section->reloc_count == 0)
continue;
/* If this section is a link-once section that will be
discarded, then don't create any stubs. */
if (section->output_section == NULL
|| section->output_section->owner != output_bfd)
continue;
/* Get the relocs. */
internal_relocs
= _bfd_elf32_link_read_relocs (input_bfd, section, NULL,
(Elf_Internal_Rela *) NULL,
info->keep_memory);
if (internal_relocs == NULL)
goto error_ret_free_local;
/* Now examine each relocation. */
irela = internal_relocs;
irelaend = irela + section->reloc_count;
for (; irela < irelaend; irela++)
{
unsigned int r_type, r_indx;
enum elf32_hppa_stub_type stub_type;
struct elf32_hppa_stub_hash_entry *stub_entry;
asection *sym_sec;
bfd_vma sym_value;
bfd_vma destination;
struct elf32_hppa_link_hash_entry *hash;
char *stub_name;
const asection *id_sec;
r_type = ELF32_R_TYPE (irela->r_info);
r_indx = ELF32_R_SYM (irela->r_info);
if (r_type >= (unsigned int) R_PARISC_UNIMPLEMENTED)
{
bfd_set_error (bfd_error_bad_value);
error_ret_free_internal:
if (elf_section_data (section)->relocs == NULL)
free (internal_relocs);
goto error_ret_free_local;
}
/* Only look for stubs on call instructions. */
if (r_type != (unsigned int) R_PARISC_PCREL12F
&& r_type != (unsigned int) R_PARISC_PCREL17F
&& r_type != (unsigned int) R_PARISC_PCREL22F)
continue;
/* Now determine the call target, its name, value,
section. */
sym_sec = NULL;
sym_value = 0;
destination = 0;
hash = NULL;
if (r_indx < symtab_hdr->sh_info)
{
/* It's a local symbol. */
Elf_Internal_Sym *sym;
Elf_Internal_Shdr *hdr;
sym = local_syms + r_indx;
hdr = elf_elfsections (input_bfd)[sym->st_shndx];
sym_sec = hdr->bfd_section;
if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
sym_value = sym->st_value;
destination = (sym_value + irela->r_addend
+ sym_sec->output_offset
+ sym_sec->output_section->vma);
}
else
{
/* It's an external symbol. */
int e_indx;
e_indx = r_indx - symtab_hdr->sh_info;
hash = ((struct elf32_hppa_link_hash_entry *)
elf_sym_hashes (input_bfd)[e_indx]);
while (hash->elf.root.type == bfd_link_hash_indirect
|| hash->elf.root.type == bfd_link_hash_warning)
hash = ((struct elf32_hppa_link_hash_entry *)
hash->elf.root.u.i.link);
if (hash->elf.root.type == bfd_link_hash_defined
|| hash->elf.root.type == bfd_link_hash_defweak)
{
sym_sec = hash->elf.root.u.def.section;
sym_value = hash->elf.root.u.def.value;
if (sym_sec->output_section != NULL)
destination = (sym_value + irela->r_addend
+ sym_sec->output_offset
+ sym_sec->output_section->vma);
}
else if (hash->elf.root.type == bfd_link_hash_undefweak)
{
if (! info->shared)
continue;
}
else if (hash->elf.root.type == bfd_link_hash_undefined)
{
if (! (info->shared
&& !info->no_undefined
&& (ELF_ST_VISIBILITY (hash->elf.other)
== STV_DEFAULT)
&& hash->elf.type != STT_PARISC_MILLI))
continue;
}
else
{
bfd_set_error (bfd_error_bad_value);
goto error_ret_free_internal;
}
}
/* Determine what (if any) linker stub is needed. */
stub_type = hppa_type_of_stub (section, irela, hash,
destination);
if (stub_type == hppa_stub_none)
continue;
/* Support for grouping stub sections. */
id_sec = htab->stub_group[section->id].link_sec;
/* Get the name of this stub. */
stub_name = hppa_stub_name (id_sec, sym_sec, hash, irela);
if (!stub_name)
goto error_ret_free_internal;
stub_entry = hppa_stub_hash_lookup (&htab->stub_hash_table,
stub_name,
FALSE, FALSE);
if (stub_entry != NULL)
{
/* The proper stub has already been created. */
free (stub_name);
continue;
}
stub_entry = hppa_add_stub (stub_name, section, htab);
if (stub_entry == NULL)
{
free (stub_name);
goto error_ret_free_internal;
}
stub_entry->target_value = sym_value;
stub_entry->target_section = sym_sec;
stub_entry->stub_type = stub_type;
if (info->shared)
{
if (stub_type == hppa_stub_import)
stub_entry->stub_type = hppa_stub_import_shared;
else if (stub_type == hppa_stub_long_branch)
stub_entry->stub_type = hppa_stub_long_branch_shared;
}
stub_entry->h = hash;
stub_changed = TRUE;
}
/* We're done with the internal relocs, free them. */
if (elf_section_data (section)->relocs == NULL)
free (internal_relocs);
}
}
if (!stub_changed)
break;
/* OK, we've added some stubs. Find out the new size of the
stub sections. */
for (stub_sec = htab->stub_bfd->sections;
stub_sec != NULL;
stub_sec = stub_sec->next)
{
stub_sec->_raw_size = 0;
stub_sec->_cooked_size = 0;
}
bfd_hash_traverse (&htab->stub_hash_table, hppa_size_one_stub, htab);
/* Ask the linker to do its stuff. */
(*htab->layout_sections_again) ();
stub_changed = FALSE;
}
free (htab->all_local_syms);
return TRUE;
error_ret_free_local:
free (htab->all_local_syms);
return FALSE;
}
/* For a final link, this function is called after we have sized the
stubs to provide a value for __gp. */
bfd_boolean
elf32_hppa_set_gp (abfd, info)
bfd *abfd;
struct bfd_link_info *info;
{
struct bfd_link_hash_entry *h;
asection *sec = NULL;
bfd_vma gp_val = 0;
struct elf32_hppa_link_hash_table *htab;
htab = hppa_link_hash_table (info);
h = bfd_link_hash_lookup (&htab->elf.root, "$global$", FALSE, FALSE, FALSE);
if (h != NULL
&& (h->type == bfd_link_hash_defined
|| h->type == bfd_link_hash_defweak))
{
gp_val = h->u.def.value;
sec = h->u.def.section;
}
else
{
asection *splt;
asection *sgot;
if (htab->elf.root.creator->flavour == bfd_target_elf_flavour)
{
splt = htab->splt;
sgot = htab->sgot;
}
else
{
/* If we're not elf, look up the output sections in the
hope we may actually find them. */
splt = bfd_get_section_by_name (abfd, ".plt");
sgot = bfd_get_section_by_name (abfd, ".got");
}
/* Choose to point our LTP at, in this order, one of .plt, .got,
or .data, if these sections exist. In the case of choosing
.plt try to make the LTP ideal for addressing anywhere in the
.plt or .got with a 14 bit signed offset. Typically, the end
of the .plt is the start of the .got, so choose .plt + 0x2000
if either the .plt or .got is larger than 0x2000. If both
the .plt and .got are smaller than 0x2000, choose the end of
the .plt section. */
sec = splt;
if (sec != NULL)
{
gp_val = sec->_raw_size;
if (gp_val > 0x2000 || (sgot && sgot->_raw_size > 0x2000))
{
gp_val = 0x2000;
}
}
else
{
sec = sgot;
if (sec != NULL)
{
/* We know we don't have a .plt. If .got is large,
offset our LTP. */
if (sec->_raw_size > 0x2000)
gp_val = 0x2000;
}
else
{
/* No .plt or .got. Who cares what the LTP is? */
sec = bfd_get_section_by_name (abfd, ".data");
}
}
if (h != NULL)
{
h->type = bfd_link_hash_defined;
h->u.def.value = gp_val;
if (sec != NULL)
h->u.def.section = sec;
else
h->u.def.section = bfd_abs_section_ptr;
}
}
if (sec != NULL && sec->output_section != NULL)
gp_val += sec->output_section->vma + sec->output_offset;
elf_gp (abfd) = gp_val;
return TRUE;
}
/* Build all the stubs associated with the current output file. The
stubs are kept in a hash table attached to the main linker hash
table. We also set up the .plt entries for statically linked PIC
functions here. This function is called via hppaelf_finish in the
linker. */
bfd_boolean
elf32_hppa_build_stubs (info)
struct bfd_link_info *info;
{
asection *stub_sec;
struct bfd_hash_table *table;
struct elf32_hppa_link_hash_table *htab;
htab = hppa_link_hash_table (info);
for (stub_sec = htab->stub_bfd->sections;
stub_sec != NULL;
stub_sec = stub_sec->next)
{
bfd_size_type size;
/* Allocate memory to hold the linker stubs. */
size = stub_sec->_raw_size;
stub_sec->contents = (unsigned char *) bfd_zalloc (htab->stub_bfd, size);
if (stub_sec->contents == NULL && size != 0)
return FALSE;
stub_sec->_raw_size = 0;
}
/* Build the stubs as directed by the stub hash table. */
table = &htab->stub_hash_table;
bfd_hash_traverse (table, hppa_build_one_stub, info);
return TRUE;
}
/* Perform a final link. */
static bfd_boolean
elf32_hppa_final_link (abfd, info)
bfd *abfd;
struct bfd_link_info *info;
{
/* Invoke the regular ELF linker to do all the work. */
if (!bfd_elf32_bfd_final_link (abfd, info))
return FALSE;
/* If we're producing a final executable, sort the contents of the
unwind section. */
return elf_hppa_sort_unwind (abfd);
}
/* Record the lowest address for the data and text segments. */
static void
hppa_record_segment_addr (abfd, section, data)
bfd *abfd ATTRIBUTE_UNUSED;
asection *section;
PTR data;
{
struct elf32_hppa_link_hash_table *htab;
htab = (struct elf32_hppa_link_hash_table *) data;
if ((section->flags & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
{
bfd_vma value = section->vma - section->filepos;
if ((section->flags & SEC_READONLY) != 0)
{
if (value < htab->text_segment_base)
htab->text_segment_base = value;
}
else
{
if (value < htab->data_segment_base)
htab->data_segment_base = value;
}
}
}
/* Perform a relocation as part of a final link. */
static bfd_reloc_status_type
final_link_relocate (input_section, contents, rel, value, htab, sym_sec, h)
asection *input_section;
bfd_byte *contents;
const Elf_Internal_Rela *rel;
bfd_vma value;
struct elf32_hppa_link_hash_table *htab;
asection *sym_sec;
struct elf32_hppa_link_hash_entry *h;
{
int insn;
unsigned int r_type = ELF32_R_TYPE (rel->r_info);
reloc_howto_type *howto = elf_hppa_howto_table + r_type;
int r_format = howto->bitsize;
enum hppa_reloc_field_selector_type_alt r_field;
bfd *input_bfd = input_section->owner;
bfd_vma offset = rel->r_offset;
bfd_vma max_branch_offset = 0;
bfd_byte *hit_data = contents + offset;
bfd_signed_vma addend = rel->r_addend;
bfd_vma location;
struct elf32_hppa_stub_hash_entry *stub_entry = NULL;
int val;
if (r_type == R_PARISC_NONE)
return bfd_reloc_ok;
insn = bfd_get_32 (input_bfd, hit_data);
/* Find out where we are and where we're going. */
location = (offset +
input_section->output_offset +
input_section->output_section->vma);
switch (r_type)
{
case R_PARISC_PCREL12F:
case R_PARISC_PCREL17F:
case R_PARISC_PCREL22F:
/* If this call should go via the plt, find the import stub in
the stub hash. */
if (sym_sec == NULL
|| sym_sec->output_section == NULL
|| (h != NULL
&& h->elf.plt.offset != (bfd_vma) -1
&& (h->elf.dynindx != -1 || h->pic_call)
&& !h->plabel))
{
stub_entry = hppa_get_stub_entry (input_section, sym_sec,
h, rel, htab);
if (stub_entry != NULL)
{
value = (stub_entry->stub_offset
+ stub_entry->stub_sec->output_offset
+ stub_entry->stub_sec->output_section->vma);
addend = 0;
}
else if (sym_sec == NULL && h != NULL
&& h->elf.root.type == bfd_link_hash_undefweak)
{
/* It's OK if undefined weak. Calls to undefined weak
symbols behave as if the "called" function
immediately returns. We can thus call to a weak
function without first checking whether the function
is defined. */
value = location;
addend = 8;
}
else
return bfd_reloc_undefined;
}
/* Fall thru. */
case R_PARISC_PCREL21L:
case R_PARISC_PCREL17C:
case R_PARISC_PCREL17R:
case R_PARISC_PCREL14R:
case R_PARISC_PCREL14F:
/* Make it a pc relative offset. */
value -= location;
addend -= 8;
break;
case R_PARISC_DPREL21L:
case R_PARISC_DPREL14R:
case R_PARISC_DPREL14F:
/* For all the DP relative relocations, we need to examine the symbol's
section. If it has no section or if it's a code section, then
"data pointer relative" makes no sense. In that case we don't
adjust the "value", and for 21 bit addil instructions, we change the
source addend register from %dp to %r0. This situation commonly
arises for undefined weak symbols and when a variable's "constness"
is declared differently from the way the variable is defined. For
instance: "extern int foo" with foo defined as "const int foo". */
if (sym_sec == NULL || (sym_sec->flags & SEC_CODE) != 0)
{
if ((insn & ((0x3f << 26) | (0x1f << 21)))
== (((int) OP_ADDIL << 26) | (27 << 21)))
{
insn &= ~ (0x1f << 21);
#if 0 /* debug them. */
(*_bfd_error_handler)
(_("%s(%s+0x%lx): fixing %s"),
bfd_archive_filename (input_bfd),
input_section->name,
(long) rel->r_offset,
howto->name);
#endif
}
/* Now try to make things easy for the dynamic linker. */
break;
}
/* Fall thru. */
case R_PARISC_DLTIND21L:
case R_PARISC_DLTIND14R:
case R_PARISC_DLTIND14F:
value -= elf_gp (input_section->output_section->owner);
break;
case R_PARISC_SEGREL32:
if ((sym_sec->flags & SEC_CODE) != 0)
value -= htab->text_segment_base;
else
value -= htab->data_segment_base;
break;
default:
break;
}
switch (r_type)
{
case R_PARISC_DIR32:
case R_PARISC_DIR14F:
case R_PARISC_DIR17F:
case R_PARISC_PCREL17C:
case R_PARISC_PCREL14F:
case R_PARISC_DPREL14F:
case R_PARISC_PLABEL32:
case R_PARISC_DLTIND14F:
case R_PARISC_SEGBASE:
case R_PARISC_SEGREL32:
r_field = e_fsel;
break;
case R_PARISC_DLTIND21L:
case R_PARISC_PCREL21L:
case R_PARISC_PLABEL21L:
r_field = e_lsel;
break;
case R_PARISC_DIR21L:
case R_PARISC_DPREL21L:
r_field = e_lrsel;
break;
case R_PARISC_PCREL17R:
case R_PARISC_PCREL14R:
case R_PARISC_PLABEL14R:
case R_PARISC_DLTIND14R:
r_field = e_rsel;
break;
case R_PARISC_DIR17R:
case R_PARISC_DIR14R:
case R_PARISC_DPREL14R:
r_field = e_rrsel;
break;
case R_PARISC_PCREL12F:
case R_PARISC_PCREL17F:
case R_PARISC_PCREL22F:
r_field = e_fsel;
if (r_type == (unsigned int) R_PARISC_PCREL17F)
{
max_branch_offset = (1 << (17-1)) << 2;
}
else if (r_type == (unsigned int) R_PARISC_PCREL12F)
{
max_branch_offset = (1 << (12-1)) << 2;
}
else
{
max_branch_offset = (1 << (22-1)) << 2;
}
/* sym_sec is NULL on undefined weak syms or when shared on
undefined syms. We've already checked for a stub for the
shared undefined case. */
if (sym_sec == NULL)
break;
/* If the branch is out of reach, then redirect the
call to the local stub for this function. */
if (value + addend + max_branch_offset >= 2*max_branch_offset)
{
stub_entry = hppa_get_stub_entry (input_section, sym_sec,
h, rel, htab);
if (stub_entry == NULL)
return bfd_reloc_undefined;
/* Munge up the value and addend so that we call the stub
rather than the procedure directly. */
value = (stub_entry->stub_offset
+ stub_entry->stub_sec->output_offset
+ stub_entry->stub_sec->output_section->vma
- location);
addend = -8;
}
break;
/* Something we don't know how to handle. */
default:
return bfd_reloc_notsupported;
}
/* Make sure we can reach the stub. */
if (max_branch_offset != 0
&& value + addend + max_branch_offset >= 2*max_branch_offset)
{
(*_bfd_error_handler)
(_("%s(%s+0x%lx): cannot reach %s, recompile with -ffunction-sections"),
bfd_archive_filename (input_bfd),
input_section->name,
(long) rel->r_offset,
stub_entry->root.string);
bfd_set_error (bfd_error_bad_value);
return bfd_reloc_notsupported;
}
val = hppa_field_adjust (value, addend, r_field);
switch (r_type)
{
case R_PARISC_PCREL12F:
case R_PARISC_PCREL17C:
case R_PARISC_PCREL17F:
case R_PARISC_PCREL17R:
case R_PARISC_PCREL22F:
case R_PARISC_DIR17F:
case R_PARISC_DIR17R:
/* This is a branch. Divide the offset by four.
Note that we need to decide whether it's a branch or
otherwise by inspecting the reloc. Inspecting insn won't
work as insn might be from a .word directive. */
val >>= 2;
break;
default:
break;
}
insn = hppa_rebuild_insn (insn, val, r_format);
/* Update the instruction word. */
bfd_put_32 (input_bfd, (bfd_vma) insn, hit_data);
return bfd_reloc_ok;
}
/* Relocate an HPPA ELF section. */
static bfd_boolean
elf32_hppa_relocate_section (output_bfd, info, input_bfd, input_section,
contents, relocs, local_syms, local_sections)
bfd *output_bfd;
struct bfd_link_info *info;
bfd *input_bfd;
asection *input_section;
bfd_byte *contents;
Elf_Internal_Rela *relocs;
Elf_Internal_Sym *local_syms;
asection **local_sections;
{
bfd_vma *local_got_offsets;
struct elf32_hppa_link_hash_table *htab;
Elf_Internal_Shdr *symtab_hdr;
Elf_Internal_Rela *rel;
Elf_Internal_Rela *relend;
if (info->relocateable)
return TRUE;
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
htab = hppa_link_hash_table (info);
local_got_offsets = elf_local_got_offsets (input_bfd);
rel = relocs;
relend = relocs + input_section->reloc_count;
for (; rel < relend; rel++)
{
unsigned int r_type;
reloc_howto_type *howto;
unsigned int r_symndx;
struct elf32_hppa_link_hash_entry *h;
Elf_Internal_Sym *sym;
asection *sym_sec;
bfd_vma relocation;
bfd_reloc_status_type r;
const char *sym_name;
bfd_boolean plabel;
bfd_boolean warned_undef;
r_type = ELF32_R_TYPE (rel->r_info);
if (r_type >= (unsigned int) R_PARISC_UNIMPLEMENTED)
{
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
if (r_type == (unsigned int) R_PARISC_GNU_VTENTRY
|| r_type == (unsigned int) R_PARISC_GNU_VTINHERIT)
continue;
/* This is a final link. */
r_symndx = ELF32_R_SYM (rel->r_info);
h = NULL;
sym = NULL;
sym_sec = NULL;
warned_undef = FALSE;
if (r_symndx < symtab_hdr->sh_info)
{
/* This is a local symbol, h defaults to NULL. */
sym = local_syms + r_symndx;
sym_sec = local_sections[r_symndx];
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sym_sec, rel);
}
else
{
int indx;
/* It's a global; Find its entry in the link hash. */
indx = r_symndx - symtab_hdr->sh_info;
h = ((struct elf32_hppa_link_hash_entry *)
elf_sym_hashes (input_bfd)[indx]);
while (h->elf.root.type == bfd_link_hash_indirect
|| h->elf.root.type == bfd_link_hash_warning)
h = (struct elf32_hppa_link_hash_entry *) h->elf.root.u.i.link;
relocation = 0;
if (h->elf.root.type == bfd_link_hash_defined
|| h->elf.root.type == bfd_link_hash_defweak)
{
sym_sec = h->elf.root.u.def.section;
/* If sym_sec->output_section is NULL, then it's a
symbol defined in a shared library. */
if (sym_sec->output_section != NULL)
relocation = (h->elf.root.u.def.value
+ sym_sec->output_offset
+ sym_sec->output_section->vma);
}
else if (h->elf.root.type == bfd_link_hash_undefweak)
;
else if (info->shared && !info->no_undefined
&& ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
&& h->elf.type != STT_PARISC_MILLI)
{
if (!((*info->callbacks->undefined_symbol)
(info, h->elf.root.root.string, input_bfd,
input_section, rel->r_offset, FALSE)))
return FALSE;
warned_undef = TRUE;
}
else
{
if (!((*info->callbacks->undefined_symbol)
(info, h->elf.root.root.string, input_bfd,
input_section, rel->r_offset, TRUE)))
return FALSE;
warned_undef = TRUE;
}
}
/* Do any required modifications to the relocation value, and
determine what types of dynamic info we need to output, if
any. */
plabel = 0;
switch (r_type)
{
case R_PARISC_DLTIND14F:
case R_PARISC_DLTIND14R:
case R_PARISC_DLTIND21L:
{
bfd_vma off;
bfd_boolean do_got = 0;
/* Relocation is to the entry for this symbol in the
global offset table. */
if (h != NULL)
{
bfd_boolean dyn;
off = h->elf.got.offset;
dyn = htab->elf.dynamic_sections_created;
if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, &h->elf))
{
/* If we aren't going to call finish_dynamic_symbol,
then we need to handle initialisation of the .got
entry and create needed relocs here. Since the
offset must always be a multiple of 4, we use the
least significant bit to record whether we have
initialised it already. */
if ((off & 1) != 0)
off &= ~1;
else
{
h->elf.got.offset |= 1;
do_got = 1;
}
}
}
else
{
/* Local symbol case. */
if (local_got_offsets == NULL)
abort ();
off = local_got_offsets[r_symndx];
/* The offset must always be a multiple of 4. We use
the least significant bit to record whether we have
already generated the necessary reloc. */
if ((off & 1) != 0)
off &= ~1;
else
{
local_got_offsets[r_symndx] |= 1;
do_got = 1;
}
}
if (do_got)
{
if (info->shared)
{
/* Output a dynamic relocation for this GOT entry.
In this case it is relative to the base of the
object because the symbol index is zero. */
Elf_Internal_Rela outrel;
bfd_byte *loc;
asection *s = htab->srelgot;
outrel.r_offset = (off
+ htab->sgot->output_offset
+ htab->sgot->output_section->vma);
outrel.r_info = ELF32_R_INFO (0, R_PARISC_DIR32);
outrel.r_addend = relocation;
loc = s->contents;
loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
}
else
bfd_put_32 (output_bfd, relocation,
htab->sgot->contents + off);
}
if (off >= (bfd_vma) -2)
abort ();
/* Add the base of the GOT to the relocation value. */
relocation = (off
+ htab->sgot->output_offset
+ htab->sgot->output_section->vma);
}
break;
case R_PARISC_SEGREL32:
/* If this is the first SEGREL relocation, then initialize
the segment base values. */
if (htab->text_segment_base == (bfd_vma) -1)
bfd_map_over_sections (output_bfd, hppa_record_segment_addr, htab);
break;
case R_PARISC_PLABEL14R:
case R_PARISC_PLABEL21L:
case R_PARISC_PLABEL32:
if (htab->elf.dynamic_sections_created)
{
bfd_vma off;
bfd_boolean do_plt = 0;
/* If we have a global symbol with a PLT slot, then
redirect this relocation to it. */
if (h != NULL)
{
off = h->elf.plt.offset;
if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, &h->elf))
{
/* In a non-shared link, adjust_dynamic_symbols
isn't called for symbols forced local. We
need to write out the plt entry here. */
if ((off & 1) != 0)
off &= ~1;
else
{
h->elf.plt.offset |= 1;
do_plt = 1;
}
}
}
else
{
bfd_vma *local_plt_offsets;
if (local_got_offsets == NULL)
abort ();
local_plt_offsets = local_got_offsets + symtab_hdr->sh_info;
off = local_plt_offsets[r_symndx];
/* As for the local .got entry case, we use the last
bit to record whether we've already initialised
this local .plt entry. */
if ((off & 1) != 0)
off &= ~1;
else
{
local_plt_offsets[r_symndx] |= 1;
do_plt = 1;
}
}
if (do_plt)
{
if (info->shared)
{
/* Output a dynamic IPLT relocation for this
PLT entry. */
Elf_Internal_Rela outrel;
bfd_byte *loc;
asection *s = htab->srelplt;
outrel.r_offset = (off
+ htab->splt->output_offset
+ htab->splt->output_section->vma);
outrel.r_info = ELF32_R_INFO (0, R_PARISC_IPLT);
outrel.r_addend = relocation;
loc = s->contents;
loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
}
else
{
bfd_put_32 (output_bfd,
relocation,
htab->splt->contents + off);
bfd_put_32 (output_bfd,
elf_gp (htab->splt->output_section->owner),
htab->splt->contents + off + 4);
}
}
if (off >= (bfd_vma) -2)
abort ();
/* PLABELs contain function pointers. Relocation is to
the entry for the function in the .plt. The magic +2
offset signals to $$dyncall that the function pointer
is in the .plt and thus has a gp pointer too.
Exception: Undefined PLABELs should have a value of
zero. */
if (h == NULL
|| (h->elf.root.type != bfd_link_hash_undefweak
&& h->elf.root.type != bfd_link_hash_undefined))
{
relocation = (off
+ htab->splt->output_offset
+ htab->splt->output_section->vma
+ 2);
}
plabel = 1;
}
/* Fall through and possibly emit a dynamic relocation. */
case R_PARISC_DIR17F:
case R_PARISC_DIR17R:
case R_PARISC_DIR14F:
case R_PARISC_DIR14R:
case R_PARISC_DIR21L:
case R_PARISC_DPREL14F:
case R_PARISC_DPREL14R:
case R_PARISC_DPREL21L:
case R_PARISC_DIR32:
/* r_symndx will be zero only for relocs against symbols
from removed linkonce sections, or sections discarded by
a linker script. */
if (r_symndx == 0
|| (input_section->flags & SEC_ALLOC) == 0)
break;
/* The reloc types handled here and this conditional
expression must match the code in ..check_relocs and
allocate_dynrelocs. ie. We need exactly the same condition
as in ..check_relocs, with some extra conditions (dynindx
test in this case) to cater for relocs removed by
allocate_dynrelocs. If you squint, the non-shared test
here does indeed match the one in ..check_relocs, the
difference being that here we test DEF_DYNAMIC as well as
!DEF_REGULAR. All common syms end up with !DEF_REGULAR,
which is why we can't use just that test here.
Conversely, DEF_DYNAMIC can't be used in check_relocs as
there all files have not been loaded. */
if ((info->shared
&& (IS_ABSOLUTE_RELOC (r_type)
|| (h != NULL
&& h->elf.dynindx != -1
&& (!info->symbolic
|| (h->elf.elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR) == 0))))
|| (!info->shared
&& h != NULL
&& h->elf.dynindx != -1
&& (h->elf.elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
&& (((h->elf.elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC) != 0
&& (h->elf.elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR) == 0)
|| h->elf.root.type == bfd_link_hash_undefweak
|| h->elf.root.type == bfd_link_hash_undefined)))
{
Elf_Internal_Rela outrel;
bfd_boolean skip;
asection *sreloc;
bfd_byte *loc;
/* When generating a shared object, these relocations
are copied into the output file to be resolved at run
time. */
outrel.r_addend = rel->r_addend;
outrel.r_offset =
_bfd_elf_section_offset (output_bfd, info, input_section,
rel->r_offset);
skip = (outrel.r_offset == (bfd_vma) -1
|| outrel.r_offset == (bfd_vma) -2);
outrel.r_offset += (input_section->output_offset
+ input_section->output_section->vma);
if (skip)
{
memset (&outrel, 0, sizeof (outrel));
}
else if (h != NULL
&& h->elf.dynindx != -1
&& (plabel
|| !IS_ABSOLUTE_RELOC (r_type)
|| !info->shared
|| !info->symbolic
|| (h->elf.elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR) == 0))
{
outrel.r_info = ELF32_R_INFO (h->elf.dynindx, r_type);
}
else /* It's a local symbol, or one marked to become local. */
{
int indx = 0;
/* Add the absolute offset of the symbol. */
outrel.r_addend += relocation;
/* Global plabels need to be processed by the
dynamic linker so that functions have at most one
fptr. For this reason, we need to differentiate
between global and local plabels, which we do by
providing the function symbol for a global plabel
reloc, and no symbol for local plabels. */
if (! plabel
&& sym_sec != NULL
&& sym_sec->output_section != NULL
&& ! bfd_is_abs_section (sym_sec))
{
indx = elf_section_data (sym_sec->output_section)->dynindx;
/* We are turning this relocation into one
against a section symbol, so subtract out the
output section's address but not the offset
of the input section in the output section. */
outrel.r_addend -= sym_sec->output_section->vma;
}
outrel.r_info = ELF32_R_INFO (indx, r_type);
}
#if 0
/* EH info can cause unaligned DIR32 relocs.
Tweak the reloc type for the dynamic linker. */
if (r_type == R_PARISC_DIR32 && (outrel.r_offset & 3) != 0)
outrel.r_info = ELF32_R_INFO (ELF32_R_SYM (outrel.r_info),
R_PARISC_DIR32U);
#endif
sreloc = elf_section_data (input_section)->sreloc;
if (sreloc == NULL)
abort ();
loc = sreloc->contents;
loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
}
break;
default:
break;
}
r = final_link_relocate (input_section, contents, rel, relocation,
htab, sym_sec, h);
if (r == bfd_reloc_ok)
continue;
if (h != NULL)
sym_name = h->elf.root.root.string;
else
{
sym_name = bfd_elf_string_from_elf_section (input_bfd,
symtab_hdr->sh_link,
sym->st_name);
if (sym_name == NULL)
return FALSE;
if (*sym_name == '\0')
sym_name = bfd_section_name (input_bfd, sym_sec);
}
howto = elf_hppa_howto_table + r_type;
if (r == bfd_reloc_undefined || r == bfd_reloc_notsupported)
{
if (r == bfd_reloc_notsupported || !warned_undef)
{
(*_bfd_error_handler)
(_("%s(%s+0x%lx): cannot handle %s for %s"),
bfd_archive_filename (input_bfd),
input_section->name,
(long) rel->r_offset,
howto->name,
sym_name);
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
}
else
{
if (!((*info->callbacks->reloc_overflow)
(info, sym_name, howto->name, (bfd_vma) 0,
input_bfd, input_section, rel->r_offset)))
return FALSE;
}
}
return TRUE;
}
/* Finish up dynamic symbol handling. We set the contents of various
dynamic sections here. */
static bfd_boolean
elf32_hppa_finish_dynamic_symbol (output_bfd, info, h, sym)
bfd *output_bfd;
struct bfd_link_info *info;
struct elf_link_hash_entry *h;
Elf_Internal_Sym *sym;
{
struct elf32_hppa_link_hash_table *htab;
htab = hppa_link_hash_table (info);
if (h->plt.offset != (bfd_vma) -1)
{
bfd_vma value;
if (h->plt.offset & 1)
abort ();
/* This symbol has an entry in the procedure linkage table. Set
it up.
The format of a plt entry is
<funcaddr>
<__gp>
*/
value = 0;
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
value = h->root.u.def.value;
if (h->root.u.def.section->output_section != NULL)
value += (h->root.u.def.section->output_offset
+ h->root.u.def.section->output_section->vma);
}
if (! ((struct elf32_hppa_link_hash_entry *) h)->pic_call)
{
Elf_Internal_Rela rel;
bfd_byte *loc;
/* Create a dynamic IPLT relocation for this entry. */
rel.r_offset = (h->plt.offset
+ htab->splt->output_offset
+ htab->splt->output_section->vma);
if (h->dynindx != -1)
{
rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_IPLT);
rel.r_addend = 0;
}
else
{
/* This symbol has been marked to become local, and is
used by a plabel so must be kept in the .plt. */
rel.r_info = ELF32_R_INFO (0, R_PARISC_IPLT);
rel.r_addend = value;
}
loc = htab->srelplt->contents;
loc += htab->srelplt->reloc_count++ * sizeof (Elf32_External_Rela);
bfd_elf32_swap_reloca_out (htab->splt->output_section->owner,
&rel, loc);
}
else
{
bfd_put_32 (htab->splt->owner,
value,
htab->splt->contents + h->plt.offset);
bfd_put_32 (htab->splt->owner,
elf_gp (htab->splt->output_section->owner),
htab->splt->contents + h->plt.offset + 4);
}
if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
{
/* Mark the symbol as undefined, rather than as defined in
the .plt section. Leave the value alone. */
sym->st_shndx = SHN_UNDEF;
}
}
if (h->got.offset != (bfd_vma) -1)
{
Elf_Internal_Rela rel;
bfd_byte *loc;
/* This symbol has an entry in the global offset table. Set it
up. */
rel.r_offset = ((h->got.offset &~ (bfd_vma) 1)
+ htab->sgot->output_offset
+ htab->sgot->output_section->vma);
/* If this is a -Bsymbolic link and the symbol is defined
locally or was forced to be local because of a version file,
we just want to emit a RELATIVE reloc. The entry in the
global offset table will already have been initialized in the
relocate_section function. */
if (info->shared
&& (info->symbolic || h->dynindx == -1)
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
{
rel.r_info = ELF32_R_INFO (0, R_PARISC_DIR32);
rel.r_addend = (h->root.u.def.value
+ h->root.u.def.section->output_offset
+ h->root.u.def.section->output_section->vma);
}
else
{
if ((h->got.offset & 1) != 0)
abort ();
bfd_put_32 (output_bfd, (bfd_vma) 0,
htab->sgot->contents + h->got.offset);
rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_DIR32);
rel.r_addend = 0;
}
loc = htab->srelgot->contents;
loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
}
if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
{
asection *s;
Elf_Internal_Rela rel;
bfd_byte *loc;
/* This symbol needs a copy reloc. Set it up. */
if (! (h->dynindx != -1
&& (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)))
abort ();
s = htab->srelbss;
rel.r_offset = (h->root.u.def.value
+ h->root.u.def.section->output_offset
+ h->root.u.def.section->output_section->vma);
rel.r_addend = 0;
rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_COPY);
loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
}
/* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
if (h->root.root.string[0] == '_'
&& (strcmp (h->root.root.string, "_DYNAMIC") == 0
|| strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0))
{
sym->st_shndx = SHN_ABS;
}
return TRUE;
}
/* Used to decide how to sort relocs in an optimal manner for the
dynamic linker, before writing them out. */
static enum elf_reloc_type_class
elf32_hppa_reloc_type_class (rela)
const Elf_Internal_Rela *rela;
{
if (ELF32_R_SYM (rela->r_info) == 0)
return reloc_class_relative;
switch ((int) ELF32_R_TYPE (rela->r_info))
{
case R_PARISC_IPLT:
return reloc_class_plt;
case R_PARISC_COPY:
return reloc_class_copy;
default:
return reloc_class_normal;
}
}
/* Finish up the dynamic sections. */
static bfd_boolean
elf32_hppa_finish_dynamic_sections (output_bfd, info)
bfd *output_bfd;
struct bfd_link_info *info;
{
bfd *dynobj;
struct elf32_hppa_link_hash_table *htab;
asection *sdyn;
htab = hppa_link_hash_table (info);
dynobj = htab->elf.dynobj;
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
if (htab->elf.dynamic_sections_created)
{
Elf32_External_Dyn *dyncon, *dynconend;
if (sdyn == NULL)
abort ();
dyncon = (Elf32_External_Dyn *) sdyn->contents;
dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
for (; dyncon < dynconend; dyncon++)
{
Elf_Internal_Dyn dyn;
asection *s;
bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
switch (dyn.d_tag)
{
default:
continue;
case DT_PLTGOT:
/* Use PLTGOT to set the GOT register. */
dyn.d_un.d_ptr = elf_gp (output_bfd);
break;
case DT_JMPREL:
s = htab->srelplt;
dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
break;
case DT_PLTRELSZ:
s = htab->srelplt;
dyn.d_un.d_val = s->_raw_size;
break;
case DT_RELASZ:
/* Don't count procedure linkage table relocs in the
overall reloc count. */
s = htab->srelplt;
if (s == NULL)
continue;
dyn.d_un.d_val -= s->_raw_size;
break;
case DT_RELA:
/* We may not be using the standard ELF linker script.
If .rela.plt is the first .rela section, we adjust
DT_RELA to not include it. */
s = htab->srelplt;
if (s == NULL)
continue;
if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
continue;
dyn.d_un.d_ptr += s->_raw_size;
break;
}
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
}
}
if (htab->sgot != NULL && htab->sgot->_raw_size != 0)
{
/* Fill in the first entry in the global offset table.
We use it to point to our dynamic section, if we have one. */
bfd_put_32 (output_bfd,
(sdyn != NULL
? sdyn->output_section->vma + sdyn->output_offset
: (bfd_vma) 0),
htab->sgot->contents);
/* The second entry is reserved for use by the dynamic linker. */
memset (htab->sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE);
/* Set .got entry size. */
elf_section_data (htab->sgot->output_section)
->this_hdr.sh_entsize = GOT_ENTRY_SIZE;
}
if (htab->splt != NULL && htab->splt->_raw_size != 0)
{
/* Set plt entry size. */
elf_section_data (htab->splt->output_section)
->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
if (htab->need_plt_stub)
{
/* Set up the .plt stub. */
memcpy (htab->splt->contents
+ htab->splt->_raw_size - sizeof (plt_stub),
plt_stub, sizeof (plt_stub));
if ((htab->splt->output_offset
+ htab->splt->output_section->vma
+ htab->splt->_raw_size)
!= (htab->sgot->output_offset
+ htab->sgot->output_section->vma))
{
(*_bfd_error_handler)
(_(".got section not immediately after .plt section"));
return FALSE;
}
}
}
return TRUE;
}
/* Tweak the OSABI field of the elf header. */
static void
elf32_hppa_post_process_headers (abfd, link_info)
bfd *abfd;
struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
{
Elf_Internal_Ehdr * i_ehdrp;
i_ehdrp = elf_elfheader (abfd);
if (strcmp (bfd_get_target (abfd), "elf32-hppa-linux") == 0)
{
i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_LINUX;
}
else
{
i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_HPUX;
}
}
/* Called when writing out an object file to decide the type of a
symbol. */
static int
elf32_hppa_elf_get_symbol_type (elf_sym, type)
Elf_Internal_Sym *elf_sym;
int type;
{
if (ELF_ST_TYPE (elf_sym->st_info) == STT_PARISC_MILLI)
return STT_PARISC_MILLI;
else
return type;
}
/* Misc BFD support code. */
#define bfd_elf32_bfd_is_local_label_name elf_hppa_is_local_label_name
#define bfd_elf32_bfd_reloc_type_lookup elf_hppa_reloc_type_lookup
#define elf_info_to_howto elf_hppa_info_to_howto
#define elf_info_to_howto_rel elf_hppa_info_to_howto_rel
/* Stuff for the BFD linker. */
#define bfd_elf32_bfd_final_link elf32_hppa_final_link
#define bfd_elf32_bfd_link_hash_table_create elf32_hppa_link_hash_table_create
#define bfd_elf32_bfd_link_hash_table_free elf32_hppa_link_hash_table_free
#define elf_backend_add_symbol_hook elf32_hppa_add_symbol_hook
#define elf_backend_adjust_dynamic_symbol elf32_hppa_adjust_dynamic_symbol
#define elf_backend_copy_indirect_symbol elf32_hppa_copy_indirect_symbol
#define elf_backend_check_relocs elf32_hppa_check_relocs
#define elf_backend_create_dynamic_sections elf32_hppa_create_dynamic_sections
#define elf_backend_fake_sections elf_hppa_fake_sections
#define elf_backend_relocate_section elf32_hppa_relocate_section
#define elf_backend_hide_symbol elf32_hppa_hide_symbol
#define elf_backend_finish_dynamic_symbol elf32_hppa_finish_dynamic_symbol
#define elf_backend_finish_dynamic_sections elf32_hppa_finish_dynamic_sections
#define elf_backend_size_dynamic_sections elf32_hppa_size_dynamic_sections
#define elf_backend_gc_mark_hook elf32_hppa_gc_mark_hook
#define elf_backend_gc_sweep_hook elf32_hppa_gc_sweep_hook
#define elf_backend_object_p elf32_hppa_object_p
#define elf_backend_final_write_processing elf_hppa_final_write_processing
#define elf_backend_post_process_headers elf32_hppa_post_process_headers
#define elf_backend_get_symbol_type elf32_hppa_elf_get_symbol_type
#define elf_backend_reloc_type_class elf32_hppa_reloc_type_class
#define elf_backend_can_gc_sections 1
#define elf_backend_can_refcount 1
#define elf_backend_plt_alignment 2
#define elf_backend_want_got_plt 0
#define elf_backend_plt_readonly 0
#define elf_backend_want_plt_sym 0
#define elf_backend_got_header_size 8
#define elf_backend_rela_normal 1
#define TARGET_BIG_SYM bfd_elf32_hppa_vec
#define TARGET_BIG_NAME "elf32-hppa"
#define ELF_ARCH bfd_arch_hppa
#define ELF_MACHINE_CODE EM_PARISC
#define ELF_MAXPAGESIZE 0x1000
#include "elf32-target.h"
#undef TARGET_BIG_SYM
#define TARGET_BIG_SYM bfd_elf32_hppa_linux_vec
#undef TARGET_BIG_NAME
#define TARGET_BIG_NAME "elf32-hppa-linux"
#define INCLUDED_TARGET_FILE 1
#include "elf32-target.h"
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