binutils-gdb/bfd/elf32-hppa.c

3727 lines
107 KiB
C
Raw Normal View History

1999-05-03 15:29:11 +08:00
/* BFD back-end for HP PA-RISC ELF files.
2000-04-11 21:07:56 +08:00
Copyright (C) 1990, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000
1999-05-03 15:29:11 +08:00
Free Software Foundation, Inc.
2000-09-05 13:03:43 +08:00
Original code by
1999-05-03 15:29:11 +08:00
Center for Software Science
Department of Computer Science
University of Utah
2000-09-05 13:03:43 +08:00
Largely rewritten by Alan Modra <alan@linuxcare.com.au>
1999-05-03 15:29:11 +08:00
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 "elf-hppa.h"
2000-07-09 15:23:07 +08:00
#include "elf32-hppa.h"
1999-05-03 15:29:11 +08:00
2000-07-09 15:23:07 +08:00
/* We use two hash tables to hold information for linking PA ELF objects.
1999-05-03 15:29:11 +08:00
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
2000-09-05 13:03:43 +08:00
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 L'X - ($PIC_pcrel$0 - 4),%r1
: be,n R'X - ($PIC_pcrel$0 - 8)(%sr4,%r1)
Import stub to call shared library routine from normal object file
(single sub-space version)
: addil L'lt_ptr+ltoff,%dp ; get procedure entry point
: ldw R'lt_ptr+ltoff(%r1),%r21
: bv %r0(%r21)
: ldw R'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 L'ltoff,%r19 ; get procedure entry point
: ldw R'ltoff(%r1),%r21
: bv %r0(%r21)
: ldw R'ltoff+4(%r1),%r19 ; get new dlt value.
Import stub to call shared library routine from normal object file
(multiple sub-space support)
: addil L'lt_ptr+ltoff,%dp ; get procedure entry point
: ldw R'lt_ptr+ltoff(%r1),%r21
: ldw R'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 L'ltoff,%r19 ; get procedure entry point
: ldw R'ltoff(%r1),%r21
: ldw R'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"
/* Section name for stubs is the associated section name plus this
string. */
#define STUB_SUFFIX ".stub"
/* Setting the following non-zero makes all long branch stubs
generated during a shared link of the PIC variety. This saves on
relocs, but costs one extra instruction per stub. */
#ifndef LONG_BRANCH_PIC_IN_SHLIB
#define LONG_BRANCH_PIC_IN_SHLIB 1
#endif
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
/* We don't need to copy any PC- or GP-relative dynamic relocs into a
shared object's dynamic section. */
#ifndef RELATIVE_DYNAMIC_RELOCS
#define RELATIVE_DYNAMIC_RELOCS 0
#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 {
1999-05-03 15:29:11 +08:00
2000-07-09 15:23:07 +08:00
/* Base hash table entry structure. */
1999-05-03 15:29:11 +08:00
struct bfd_hash_entry root;
2000-07-09 15:23:07 +08:00
/* The stub section. */
asection *stub_sec;
2000-09-05 13:03:43 +08:00
#if ! LONG_BRANCH_PIC_IN_SHLIB
/* It's associated reloc section. */
asection *reloc_sec;
#endif
2000-07-09 15:23:07 +08:00
/* Offset within stub_sec of the beginning of this stub. */
2000-09-05 13:03:43 +08:00
bfd_vma stub_offset;
1999-05-03 15:29:11 +08:00
/* 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. */
2000-09-05 13:03:43 +08:00
bfd_vma target_value;
1999-05-03 15:29:11 +08:00
asection *target_section;
2000-09-05 13:03:43 +08:00
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. */
asection *input_section;
1999-05-03 15:29:11 +08:00
};
2000-09-05 13:03:43 +08:00
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;
#if ! LONG_BRANCH_PIC_IN_SHLIB
/* Used to track whether we have allocated space for a long branch
stub relocation for this symbol in the given section. */
asection *stub_reloc_sec;
#endif
#if ! LONG_BRANCH_PIC_IN_SHLIB || RELATIVE_DYNAMIC_RELOCS
/* 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 section in dynobj. */
asection *section;
/* Number of relocs copied in this section. */
bfd_size_type count;
} *reloc_entries;
#endif
/* Set during a static link if we detect a function is PIC. */
boolean pic_call;
};
struct elf32_hppa_link_hash_table {
1999-05-03 15:29:11 +08:00
/* The main hash table. */
struct elf_link_hash_table root;
/* The stub hash table. */
2000-07-09 15:23:07 +08:00
struct bfd_hash_table stub_hash_table;
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
/* Linker stub bfd. */
bfd *stub_bfd;
/* Whether we support multiple sub-spaces for shared libs. */
boolean multi_subspace;
/* Linker call-backs. */
asection * (*add_stub_section) PARAMS ((const char *, asection *));
void (*layout_sections_again) PARAMS ((void));
/* Arrays to keep track of which stub sections have been created. */
asection **stub_section_created;
#if ! LONG_BRANCH_PIC_IN_SHLIB
asection **reloc_section_created;
#endif
int first_init_sec;
int first_fini_sec;
2000-07-09 15:23:07 +08:00
/* Current offsets in the stub sections. */
bfd_vma *offset;
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
/* Short-cuts to get to dynamic linker sections. */
asection *sgot;
asection *srelgot;
asection *splt;
asection *srelplt;
asection *sdynbss;
asection *srelbss;
1999-05-03 15:29:11 +08:00
};
2000-09-05 13:03:43 +08:00
/* 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. */
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
/* Various hash macros and functions. */
#define hppa_link_hash_table(p) \
2000-07-09 15:23:07 +08:00
((struct elf32_hppa_link_hash_table *) ((p)->hash))
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
#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 *));
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
static struct bfd_hash_entry *hppa_link_hash_newfunc
2000-07-09 15:23:07 +08:00
PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
1999-05-03 15:29:11 +08:00
static struct bfd_link_hash_table *elf32_hppa_link_hash_table_create
PARAMS ((bfd *));
2000-09-05 13:03:43 +08:00
/* Stub handling functions. */
static char *hppa_stub_name
PARAMS ((const asection *, const asection *,
const struct elf32_hppa_link_hash_entry *,
const Elf_Internal_Rela *));
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
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 bfd_link_info *));
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
static struct elf32_hppa_stub_hash_entry *hppa_add_stub
PARAMS ((const char *, asection *, unsigned int,
struct bfd_link_info *));
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 boolean hppa_build_one_stub
PARAMS ((struct bfd_hash_entry *, PTR));
static boolean hppa_size_one_stub
PARAMS ((struct bfd_hash_entry *, PTR));
/* BFD and elf backend functions. */
static boolean elf32_hppa_object_p PARAMS ((bfd *));
1999-05-03 15:29:11 +08:00
2000-07-09 15:23:07 +08:00
static boolean elf32_hppa_add_symbol_hook
PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
const char **, flagword *, asection **, bfd_vma *));
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
static boolean elf32_hppa_create_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *));
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
static boolean elf32_hppa_check_relocs
PARAMS ((bfd *, struct bfd_link_info *,
asection *, const Elf_Internal_Rela *));
static asection *elf32_hppa_gc_mark_hook
PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
struct elf_link_hash_entry *, Elf_Internal_Sym *));
static boolean elf32_hppa_gc_sweep_hook
PARAMS ((bfd *, struct bfd_link_info *,
asection *, const Elf_Internal_Rela *));
static boolean elf32_hppa_adjust_dynamic_symbol
PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
static boolean hppa_handle_PIC_calls
PARAMS ((struct elf_link_hash_entry *, PTR));
#if ! LONG_BRANCH_PIC_IN_SHLIB || RELATIVE_DYNAMIC_RELOCS
static boolean hppa_discard_copies
PARAMS ((struct elf_link_hash_entry *, PTR));
#endif
static boolean elf32_hppa_size_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *));
static bfd_reloc_status_type final_link_relocate
PARAMS ((asection *, bfd_byte *, const Elf_Internal_Rela *,
bfd_vma, struct bfd_link_info *, asection *,
struct elf32_hppa_link_hash_entry *));
static boolean elf32_hppa_relocate_section
PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *,
bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
static boolean elf32_hppa_finish_dynamic_symbol
PARAMS ((bfd *, struct bfd_link_info *,
struct elf_link_hash_entry *, Elf_Internal_Sym *));
static boolean elf32_hppa_finish_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *));
static int elf32_hppa_elf_get_symbol_type
PARAMS ((Elf_Internal_Sym *, int));
1999-05-03 15:29:11 +08:00
/* Assorted hash table functions. */
/* Initialize an entry in the stub hash table. */
static struct bfd_hash_entry *
2000-09-05 13:03:43 +08:00
stub_hash_newfunc (entry, table, string)
1999-05-03 15:29:11 +08:00
struct bfd_hash_entry *entry;
struct bfd_hash_table *table;
const char *string;
{
struct elf32_hppa_stub_hash_entry *ret;
ret = (struct elf32_hppa_stub_hash_entry *) entry;
/* Allocate the structure if it has not already been allocated by a
subclass. */
if (ret == NULL)
2000-09-05 13:03:43 +08:00
{
ret = ((struct elf32_hppa_stub_hash_entry *)
bfd_hash_allocate (table,
sizeof (struct elf32_hppa_stub_hash_entry)));
if (ret == NULL)
return NULL;
}
1999-05-03 15:29:11 +08:00
/* Call the allocation method of the superclass. */
ret = ((struct elf32_hppa_stub_hash_entry *)
bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
if (ret)
{
/* Initialize the local fields. */
2000-07-09 15:23:07 +08:00
ret->stub_sec = NULL;
2000-09-05 13:03:43 +08:00
#if ! LONG_BRANCH_PIC_IN_SHLIB
ret->reloc_sec = NULL;
#endif
ret->stub_offset = 0;
1999-05-03 15:29:11 +08:00
ret->target_value = 0;
ret->target_section = NULL;
2000-09-05 13:03:43 +08:00
ret->stub_type = hppa_stub_long_branch;
ret->h = NULL;
ret->input_section = NULL;
}
return (struct bfd_hash_entry *) ret;
}
/* 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;
{
struct elf32_hppa_link_hash_entry *ret;
ret = (struct elf32_hppa_link_hash_entry *) entry;
/* Allocate the structure if it has not already been allocated by a
subclass. */
if (ret == NULL)
{
ret = ((struct elf32_hppa_link_hash_entry *)
bfd_hash_allocate (table,
sizeof (struct elf32_hppa_link_hash_entry)));
if (ret == NULL)
return NULL;
}
/* Call the allocation method of the superclass. */
ret = ((struct elf32_hppa_link_hash_entry *)
_bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
table, string));
if (ret)
{
/* Initialize the local fields. */
#if ! LONG_BRANCH_PIC_IN_SHLIB
ret->stub_reloc_sec = NULL;
#endif
ret->stub_cache = NULL;
#if ! LONG_BRANCH_PIC_IN_SHLIB || RELATIVE_DYNAMIC_RELOCS
ret->reloc_entries = NULL;
#endif
ret->pic_call = 0;
1999-05-03 15:29:11 +08:00
}
return (struct bfd_hash_entry *) ret;
}
2000-09-05 13:03:43 +08:00
1999-05-03 15:29:11 +08:00
/* 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;
2000-07-09 15:23:07 +08:00
ret = ((struct elf32_hppa_link_hash_table *) bfd_alloc (abfd, sizeof (*ret)));
1999-05-03 15:29:11 +08:00
if (ret == NULL)
return NULL;
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, hppa_link_hash_newfunc))
1999-05-03 15:29:11 +08:00
{
bfd_release (abfd, ret);
return NULL;
}
2000-07-09 15:23:07 +08:00
/* Init the stub hash table too. */
2000-09-05 13:03:43 +08:00
if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc))
2000-07-09 15:23:07 +08:00
return NULL;
2000-09-05 13:03:43 +08:00
ret->stub_bfd = NULL;
ret->multi_subspace = 0;
ret->add_stub_section = NULL;
ret->layout_sections_again = NULL;
ret->stub_section_created = NULL;
#if ! LONG_BRANCH_PIC_IN_SHLIB
ret->reloc_section_created = NULL;
#endif
ret->first_init_sec = 0;
ret->first_fini_sec = 0;
2000-07-09 15:23:07 +08:00
ret->offset = NULL;
2000-09-05 13:03:43 +08:00
ret->sgot = NULL;
ret->srelgot = NULL;
ret->splt = NULL;
ret->srelplt = NULL;
ret->sdynbss = NULL;
ret->srelbss = NULL;
1999-05-03 15:29:11 +08:00
return &ret->root.root;
}
2000-09-05 13:03:43 +08:00
/* Build a name for an entry in the stub hash table. */
2000-07-09 15:23:07 +08:00
static char *
2000-09-05 13:03:43 +08:00
hppa_stub_name (input_section, sym_sec, hash, rel)
2000-07-09 15:23:07 +08:00
const asection *input_section;
2000-09-05 13:03:43 +08:00
const asection *sym_sec;
const struct elf32_hppa_link_hash_entry *hash;
const Elf_Internal_Rela *rel;
2000-07-09 15:23:07 +08:00
{
char *stub_name;
2000-09-05 13:03:43 +08:00
unsigned int len;
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
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
2000-07-09 15:23:07 +08:00
{
2000-09-05 13:03:43 +08:00
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);
}
2000-07-09 15:23:07 +08:00
}
return stub_name;
}
1999-05-03 15:29:11 +08:00
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
/* 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, info)
const asection *input_section;
const asection *sym_sec;
struct elf32_hppa_link_hash_entry *hash;
const Elf_Internal_Rela *rel;
struct bfd_link_info *info;
1999-05-03 15:29:11 +08:00
{
2000-09-05 13:03:43 +08:00
struct elf32_hppa_stub_hash_entry *stub_entry;
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
if (hash != NULL && hash->stub_cache != NULL
&& hash->stub_cache->h == hash
&& hash->stub_cache->input_section == input_section)
2000-07-09 15:23:07 +08:00
{
2000-09-05 13:03:43 +08:00
stub_entry = hash->stub_cache;
}
else
{
struct bfd_hash_table *stub_hash_table;
char *stub_name;
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
stub_name = hppa_stub_name (input_section, sym_sec, hash, rel);
if (stub_name == NULL)
return NULL;
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
stub_hash_table = &hppa_link_hash_table (info)->stub_hash_table;
stub_entry = hppa_stub_hash_lookup (stub_hash_table, stub_name,
false, false);
if (stub_entry == NULL)
{
if (hash == NULL || hash->elf.root.type != bfd_link_hash_undefweak)
(*_bfd_error_handler) (_("%s(%s+0x%lx): cannot find stub entry %s"),
bfd_get_filename (input_section->owner),
input_section->name,
(long) rel->r_offset,
stub_name);
}
else
{
if (hash != NULL)
hash->stub_cache = stub_entry;
}
free (stub_name);
2000-07-09 15:23:07 +08:00
}
2000-09-05 13:03:43 +08:00
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, sec_count, info)
const char *stub_name;
asection *section;
unsigned int sec_count;
struct bfd_link_info *info;
{
asection *stub_sec;
#if ! LONG_BRANCH_PIC_IN_SHLIB
asection *reloc_sec;
2000-07-09 15:23:07 +08:00
#endif
2000-09-05 13:03:43 +08:00
struct elf32_hppa_stub_hash_entry *stub_entry;
struct elf32_hppa_link_hash_table *hplink;
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
hplink = hppa_link_hash_table (info);
stub_sec = hplink->stub_section_created[sec_count];
if (stub_sec == NULL)
2000-07-09 15:23:07 +08:00
{
2000-09-05 13:03:43 +08:00
int special_sec = 0;
/* We only want one stub for .init and .fini because glibc
splits the _init and _fini functions into two parts. We
don't want to put a stub in the middle of a function.
It would be better to merge all the stub sections for an
output section if the output section + stubs is small enough.
This would fix the .init and .fini case and also allow stubs
to be merged. It's more linker work though. */
if (strncmp (section->name, ".init", 5) == 0)
{
stub_sec = hplink->stub_section_created[hplink->first_init_sec];
special_sec = 1;
}
else if (strncmp (section->name, ".fini", 5) == 0)
{
stub_sec = hplink->stub_section_created[hplink->first_fini_sec];
special_sec = 2;
}
if (stub_sec == NULL)
{
int len;
char *s_name;
len = strlen (section->name) + sizeof (STUB_SUFFIX);
s_name = bfd_alloc (hplink->stub_bfd, len);
if (s_name == NULL)
return NULL;
strcpy (s_name, section->name);
strcpy (s_name + len - sizeof (STUB_SUFFIX), STUB_SUFFIX);
stub_sec = (*hplink->add_stub_section) (s_name, section);
if (stub_sec == NULL)
return NULL;
if (special_sec != 0)
{
if (special_sec == 1)
hplink->first_init_sec = sec_count;
else
hplink->first_fini_sec = sec_count;
}
}
hplink->stub_section_created[sec_count] = stub_sec;
2000-07-09 15:23:07 +08:00
}
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
#if ! LONG_BRANCH_PIC_IN_SHLIB
reloc_sec = hplink->reloc_section_created[sec_count];
if (reloc_sec == NULL && info->shared)
1999-05-03 15:29:11 +08:00
{
2000-09-05 13:03:43 +08:00
char *name;
name = bfd_malloc (sizeof ".rela" + strlen (stub_sec->name));
if (name == NULL)
return NULL;
strcpy (name, ".rela");
strcpy (name + sizeof ".rela" - 1, stub_sec->name);
reloc_sec = bfd_get_section_by_name (elf_hash_table (info)->dynobj,
name);
hplink->reloc_section_created[sec_count] = reloc_sec;
free (name);
}
#endif
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
/* Enter this entry into the linker stub hash table. */
stub_entry = hppa_stub_hash_lookup (&hplink->stub_hash_table, stub_name,
true, false);
if (stub_entry == NULL)
{
(*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
bfd_get_filename (section->owner),
stub_name);
return NULL;
2000-07-09 15:23:07 +08:00
}
2000-09-05 13:03:43 +08:00
stub_entry->stub_sec = stub_sec;
#if ! LONG_BRANCH_PIC_IN_SHLIB
stub_entry->reloc_sec = reloc_sec;
#endif
stub_entry->stub_offset = 0;
stub_entry->input_section = section;
return stub_entry;
2000-07-09 15:23:07 +08:00
}
2000-09-05 13:03:43 +08:00
/* 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;
2000-07-09 15:23:07 +08:00
{
bfd_vma location;
2000-09-05 13:03:43 +08:00
bfd_vma branch_offset;
bfd_vma max_branch_offset;
unsigned int r_type;
if (hash != NULL
&& (((hash->elf.root.type == bfd_link_hash_defined
|| hash->elf.root.type == bfd_link_hash_defweak)
&& hash->elf.root.u.def.section->output_section == NULL)
|| hash->elf.root.type == bfd_link_hash_undefweak
|| hash->elf.root.type == bfd_link_hash_undefined
|| hash->pic_call))
{
/* If output_section is NULL, then it's a symbol defined in a
shared library. We will need an import stub. Decide between
hppa_stub_import and hppa_stub_import_shared later.
For shared links we need stubs for undefined syms too; They
will presumably be resolved by the dynamic linker. */
return hppa_stub_import;
}
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
/* Determine where the call point is. */
location = (input_sec->output_offset
+ input_sec->output_section->vma
+ rel->r_offset);
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
branch_offset = destination - location - 8;
r_type = ELF32_R_TYPE (rel->r_info);
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
/* 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)
2000-07-09 15:23:07 +08:00
{
2000-09-05 13:03:43 +08:00
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;
2000-07-09 15:23:07 +08:00
}
2000-09-05 13:03:43 +08:00
if (branch_offset + max_branch_offset >= 2*max_branch_offset)
2000-07-09 15:23:07 +08:00
{
2000-09-05 13:03:43 +08:00
#if 0
if (hash != NULL
&& hash->elf.dynindx != -1
&& hash->elf.plt.offset != (bfd_vma) -1)
{
/* If we are doing a shared link and find we need a long
branch stub, then go via the .plt if possible. */
return hppa_stub_import;
}
else
#endif
return hppa_stub_long_branch;
}
return hppa_stub_none;
}
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
/* Build one linker stub as defined by the stub hash table entry GEN_ENTRY.
IN_ARG contains the link info pointer. */
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
#define LDIL_R1 0x20200000 /* ldil LR'XXX,%r1 */
#define BE_SR4_R1 0xe0202002 /* be,n RR'XXX(%sr4,%r1) */
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
#define BL_R1 0xe8200000 /* b,l .+8,%r1 */
#define ADDIL_R1 0x28200000 /* addil L'XXX,%r1,%r1 */
#define DEPI_R1 0xd4201c1e /* depi 0,31,2,%r1 */
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
#define ADDIL_DP 0x2b600000 /* addil L'XXX,%dp,%r1 */
#define LDW_R1_R21 0x48350000 /* ldw R'XXX(%sr0,%r1),%r21 */
#define BV_R0_R21 0xeaa0c000 /* bv %r0(%r21) */
#define LDW_R1_R19 0x48330000 /* ldw R'XXX(%sr0,%r1),%r19 */
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
#define ADDIL_R19 0x2a600000 /* addil L'XXX,%r19,%r1 */
#define LDW_R1_DP 0x483b0000 /* ldw R'XXX(%sr0,%r1),%dp */
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
#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) */
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
#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) */
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
#ifndef R19_STUBS
#define R19_STUBS 1
#endif
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
#if R19_STUBS
#define LDW_R1_DLT LDW_R1_R19
#else
#define LDW_R1_DLT LDW_R1_DP
#endif
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
static 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 *hplink;
asection *stub_sec;
bfd *stub_bfd;
bfd_byte *loc;
bfd_vma sym_value;
unsigned int insn;
int size;
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
/* 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;
hplink = hppa_link_hash_table (info);
stub_sec = stub_entry->stub_sec;
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
/* Make a note of the offset within the stubs for this entry. */
stub_entry->stub_offset = hplink->offset[stub_sec->index];
loc = stub_sec->contents + stub_entry->stub_offset;
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
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);
insn = hppa_rebuild_insn ((int) LDIL_R1,
hppa_field_adjust (sym_value, 0, e_lrsel),
21);
bfd_put_32 (stub_bfd, insn, loc);
insn = hppa_rebuild_insn ((int) BE_SR4_R1,
hppa_field_adjust (sym_value, 0, e_rrsel) >> 2,
17);
bfd_put_32 (stub_bfd, insn, loc + 4);
#if ! LONG_BRANCH_PIC_IN_SHLIB
if (info->shared)
{
/* Output a dynamic relocation for this stub. We only
output one PCREL21L reloc per stub, trusting that the
dynamic linker will also fix the implied PCREL17R for the
second instruction. PCREL21L dynamic relocs had better
never be emitted for some other purpose... */
asection *srel;
Elf_Internal_Rela outrel;
if (stub_entry->h == NULL)
2000-07-09 15:23:07 +08:00
{
(*_bfd_error_handler)
2000-09-05 13:03:43 +08:00
(_("%s(%s+0x%lx): cannot relocate %s, recompile with -ffunction-sections"),
bfd_get_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;
2000-07-09 15:23:07 +08:00
}
2000-09-05 13:03:43 +08:00
srel = stub_entry->reloc_sec;
if (srel == NULL)
2000-07-09 15:23:07 +08:00
{
(*_bfd_error_handler)
2000-09-05 13:03:43 +08:00
(_("Could not find relocation section for %s"),
stub_sec->name);
bfd_set_error (bfd_error_bad_value);
return false;
2000-07-09 15:23:07 +08:00
}
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
outrel.r_offset = (stub_entry->stub_offset
+ stub_sec->output_offset
+ stub_sec->output_section->vma);
outrel.r_info = ELF32_R_INFO (0, R_PARISC_PCREL21L);
outrel.r_addend = sym_value;
bfd_elf32_swap_reloca_out (stub_sec->output_section->owner,
&outrel,
((Elf32_External_Rela *)
srel->contents + srel->reloc_count));
++srel->reloc_count;
1999-05-03 15:29:11 +08:00
}
2000-09-05 13:03:43 +08:00
#endif
size = 8;
2000-07-09 15:23:07 +08:00
break;
2000-09-05 13:03:43 +08:00
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, (unsigned int) BL_R1, loc);
insn = hppa_rebuild_insn ((int) ADDIL_R1,
hppa_field_adjust (sym_value, -8, e_lsel),
21);
bfd_put_32 (stub_bfd, insn, loc + 4);
insn = hppa_rebuild_insn ((int) BE_SR4_R1,
hppa_field_adjust (sym_value, -8, e_rsel) >> 2,
17);
bfd_put_32 (stub_bfd, insn, loc + 8);
size = 12;
break;
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
case hppa_stub_import:
case hppa_stub_import_shared:
sym_value = (stub_entry->h->elf.plt.offset
+ hplink->splt->output_offset
+ hplink->splt->output_section->vma
- elf_gp (hplink->splt->output_section->owner));
insn = ADDIL_DP;
#if R19_STUBS
if (stub_entry->stub_type == hppa_stub_import_shared)
insn = ADDIL_R19;
#endif
insn = hppa_rebuild_insn ((int) insn,
hppa_field_adjust (sym_value, 0, e_lsel),
21);
bfd_put_32 (stub_bfd, insn, loc);
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
insn = hppa_rebuild_insn ((int) LDW_R1_R21,
hppa_field_adjust (sym_value, 0, e_rsel),
14);
bfd_put_32 (stub_bfd, insn, loc + 4);
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
if (hplink->multi_subspace)
{
insn = hppa_rebuild_insn ((int) LDW_R1_DLT,
hppa_field_adjust (sym_value, 4, e_rsel),
14);
bfd_put_32 (stub_bfd, insn, loc + 8);
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
bfd_put_32 (stub_bfd, (unsigned int) LDSID_R21_R1, loc + 12);
bfd_put_32 (stub_bfd, (unsigned int) MTSP_R1, loc + 16);
bfd_put_32 (stub_bfd, (unsigned int) BE_SR0_R21, loc + 20);
bfd_put_32 (stub_bfd, (unsigned int) STW_RP, loc + 24);
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
size = 28;
}
else
{
bfd_put_32 (stub_bfd, (unsigned int) BV_R0_R21, loc + 8);
insn = hppa_rebuild_insn ((int) LDW_R1_DLT,
hppa_field_adjust (sym_value, 4, e_rsel),
14);
bfd_put_32 (stub_bfd, insn, loc + 12);
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
size = 16;
}
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
if (!info->shared
&& stub_entry->h != NULL
&& stub_entry->h->pic_call)
1999-05-03 15:29:11 +08:00
{
2000-09-05 13:03:43 +08:00
/* 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;
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
dynobj = elf_hash_table (info)->dynobj;
eh = (struct elf32_hppa_link_hash_entry *) stub_entry->h;
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
BFD_ASSERT (eh->elf.root.type == bfd_link_hash_defined
|| eh->elf.root.type == bfd_link_hash_defweak);
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
value = (eh->elf.root.u.def.value
+ eh->elf.root.u.def.section->output_offset
+ eh->elf.root.u.def.section->output_section->vma);
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
/* Fill in the entry in the procedure linkage table.
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
The format of a plt entry is
<funcaddr> <__gp>. */
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
bfd_put_32 (hplink->splt->owner, value,
hplink->splt->contents + eh->elf.plt.offset);
value = elf_gp (hplink->splt->output_section->owner);
bfd_put_32 (hplink->splt->owner, value,
hplink->splt->contents + eh->elf.plt.offset + 4);
1999-05-03 15:29:11 +08:00
}
2000-09-05 13:03:43 +08:00
break;
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
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);
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
/* And this is where we are coming from. */
sym_value -= (stub_entry->stub_offset
+ stub_sec->output_offset
+ stub_sec->output_section->vma);
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
if (sym_value - 8 + 0x40000 >= 0x80000)
{
2000-07-09 15:23:07 +08:00
(*_bfd_error_handler)
2000-09-05 13:03:43 +08:00
(_("%s(%s+0x%lx): cannot reach %s, recompile with -ffunction-sections"),
bfd_get_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);
2000-07-09 15:23:07 +08:00
return false;
1999-05-03 15:29:11 +08:00
}
2000-09-05 13:03:43 +08:00
insn = hppa_rebuild_insn ((int) BL_RP,
hppa_field_adjust (sym_value, -8, e_fsel) >> 2,
17);
bfd_put_32 (stub_bfd, insn, loc);
bfd_put_32 (stub_bfd, (unsigned int) NOP, loc + 4);
bfd_put_32 (stub_bfd, (unsigned int) LDW_RP, loc + 8);
bfd_put_32 (stub_bfd, (unsigned int) LDSID_RP_R1, loc + 12);
bfd_put_32 (stub_bfd, (unsigned int) MTSP_R1, loc + 16);
bfd_put_32 (stub_bfd, (unsigned int) 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 = hplink->offset[stub_sec->index];
size = 24;
break;
default:
BFD_FAIL ();
return false;
1999-05-03 15:29:11 +08:00
}
2000-09-05 13:03:43 +08:00
hplink->offset[stub_sec->index] += size;
1999-05-03 15:29:11 +08:00
return true;
}
2000-09-05 13:03:43 +08:00
#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
1999-05-03 15:29:11 +08:00
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
/* As above, but don't actually build the stub. Just bump offset so
we know stub section sizes. */
static boolean
hppa_size_one_stub (gen_entry, in_arg)
struct bfd_hash_entry *gen_entry;
PTR in_arg;
1999-05-03 15:29:11 +08:00
{
2000-09-05 13:03:43 +08:00
struct elf32_hppa_stub_hash_entry *stub_entry;
struct elf32_hppa_link_hash_table *hplink;
int size;
/* Massage our args to the form they really have. */
stub_entry = (struct elf32_hppa_stub_hash_entry *) gen_entry;
hplink = (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 */
1999-05-03 15:29:11 +08:00
{
2000-09-05 13:03:43 +08:00
if (hplink->multi_subspace)
size = 28;
else
size = 16;
}
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
hplink->offset[stub_entry->stub_sec->index] += size;
return true;
}
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
/* Return nonzero if ABFD represents an HPPA ELF32 file.
Additionally we set the default architecture and machine. */
static boolean
elf32_hppa_object_p (abfd)
bfd *abfd;
{
unsigned int flags = elf_elfheader (abfd)->e_flags;
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
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;
1999-05-03 15:29:11 +08:00
}
2000-09-05 13:03:43 +08:00
1999-05-03 15:29:11 +08:00
/* Undo the generic ELF code's subtraction of section->vma from the
value of each external symbol. */
static 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;
1999-05-03 15:29:11 +08:00
asection **secp;
bfd_vma *valp;
{
*valp += (*secp)->vma;
return true;
}
2000-09-05 13:03:43 +08:00
/* Create the .plt and .got sections, and set up our hash table
short-cuts to various dynamic sections. */
static boolean
elf32_hppa_create_dynamic_sections (abfd, info)
bfd *abfd;
struct bfd_link_info *info;
1999-05-03 15:29:11 +08:00
{
2000-09-05 13:03:43 +08:00
flagword flags;
asection *s;
struct elf32_hppa_link_hash_table *hplink;
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
/* Don't try to create the .plt and .got twice. */
hplink = hppa_link_hash_table (info);
if (hplink->splt != NULL)
return true;
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
/* Call the generic code to do most of the work. */
if (! _bfd_elf_create_dynamic_sections (abfd, info))
return false;
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
/* Our .plt just contains pointers. I suppose we should be using
.plt.got but .plt.got doesn't make too much sense without a .plt
section. Set the flags to say the .plt isn't executable. */
s = bfd_get_section_by_name (abfd, ".plt");
flags = bfd_get_section_flags (abfd, s);
if (! bfd_set_section_flags (abfd, s, flags & ~SEC_CODE))
return false;
hplink->splt = s;
hplink->srelplt = bfd_get_section_by_name (abfd, ".rela.plt");
hplink->sgot = bfd_get_section_by_name (abfd, ".got");
hplink->srelgot = bfd_make_section (abfd, ".rela.got");
if (hplink->srelgot == NULL
|| ! bfd_set_section_flags (abfd, hplink->srelgot,
(SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
| SEC_LINKER_CREATED
| SEC_READONLY))
|| ! bfd_set_section_alignment (abfd, hplink->srelgot, 2))
return false;
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
hplink->sdynbss = bfd_get_section_by_name (abfd, ".dynbss");
hplink->srelbss = bfd_get_section_by_name (abfd, ".rela.bss");
return true;
}
/* Look through the relocs for a section during the first phase, and
allocate space in the global offset table or procedure linkage
table. At this point we haven't necessarily read all the input
files. */
1999-05-03 15:29:11 +08:00
static boolean
2000-09-05 13:03:43 +08:00
elf32_hppa_check_relocs (abfd, info, sec, relocs)
bfd *abfd;
struct bfd_link_info *info;
asection *sec;
const Elf_Internal_Rela *relocs;
1999-05-03 15:29:11 +08:00
{
2000-09-05 13:03:43 +08:00
bfd *dynobj;
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
bfd_signed_vma *local_got_refcounts;
const Elf_Internal_Rela *rel;
const Elf_Internal_Rela *rel_end;
struct elf32_hppa_link_hash_table *hplink;
asection *sreloc;
asection *stubreloc;
if (info->relocateable)
return true;
hplink = hppa_link_hash_table (info);
dynobj = elf_hash_table (info)->dynobj;
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (abfd);
local_got_refcounts = elf_local_got_refcounts (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,
#if LONG_BRANCH_PIC_IN_SHLIB
NEED_STUBREL = 0 /* We won't be needing them in this case. */
#else
NEED_STUBREL = 8
#endif
};
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
unsigned int r_symndx, r_type;
struct elf32_hppa_link_hash_entry *h;
int need_entry;
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
r_symndx = ELF32_R_SYM (rel->r_info);
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
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]);
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
r_type = ELF32_R_TYPE (rel->r_info);
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
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 (h == NULL)
{
/* If this is a local symbol we do not need to create a
PLT entry, but if we are creating a shared object we
have to output a relocation for the PLABEL itself. */
need_entry = NEED_DYNREL;
}
else
{
/* If it is a global symbol, then we do need to create a
PLT entry, and additionally, if we are creating a
shared object, we need to output a dynamic relocation
pointing to that PLT entry. */
need_entry = NEED_PLT | NEED_DYNREL;
}
break;
case R_PARISC_PCREL12F:
case R_PARISC_PCREL17C:
case R_PARISC_PCREL17F:
case R_PARISC_PCREL22F:
/* Handle calls, and function pointers as they 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 | NEED_STUBREL;
}
break;
case R_PARISC_SEGBASE: /* Used to set segment base. */
case R_PARISC_SEGREL32: /* Relative reloc. */
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_get_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_DIR14R: /* Used for load/store from absolute locn. */
case R_PARISC_DIR21L: /* As above, and for ext branches too. */
#if 1
/* 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_get_filename (abfd),
elf_hppa_howto_table[r_type].name);
}
/* Fall through. */
#endif
case R_PARISC_DIR32: /* .word, PARISC.unwind 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_offset))
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 (dynobj == NULL)
elf_hash_table (info)->dynobj = dynobj = abfd;
if (hplink->sgot == NULL)
{
if (! elf32_hppa_create_dynamic_sections (dynobj, info))
return false;
}
if (h != NULL)
{
if (h->elf.got.refcount == -1)
{
h->elf.got.refcount = 1;
/* Make sure this symbol is output as a dynamic symbol. */
if (h->elf.dynindx == -1)
{
if (! bfd_elf32_link_record_dynamic_symbol (info,
&h->elf))
return false;
}
hplink->sgot->_raw_size += GOT_ENTRY_SIZE;
hplink->srelgot->_raw_size += sizeof (Elf32_External_Rela);
}
else
h->elf.got.refcount += 1;
}
else
{
/* This is a global offset table entry for a local symbol. */
if (local_got_refcounts == NULL)
{
size_t size;
size = symtab_hdr->sh_info * sizeof (bfd_signed_vma);
local_got_refcounts = ((bfd_signed_vma *)
bfd_alloc (abfd, size));
if (local_got_refcounts == NULL)
return false;
elf_local_got_refcounts (abfd) = local_got_refcounts;
memset (local_got_refcounts, -1, size);
}
if (local_got_refcounts[r_symndx] == -1)
{
local_got_refcounts[r_symndx] = 1;
hplink->sgot->_raw_size += GOT_ENTRY_SIZE;
if (info->shared)
{
/* If we are generating a shared object, we need to
output a reloc so that the dynamic linker can
adjust this GOT entry (because the address
the shared library is loaded at is not fixed). */
hplink->srelgot->_raw_size +=
sizeof (Elf32_External_Rela);
}
}
else
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->elf.plt.refcount == -1)
{
h->elf.plt.refcount = 1;
h->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
}
else
h->elf.plt.refcount += 1;
}
}
if (need_entry & (NEED_DYNREL | NEED_STUBREL))
{
/* 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)
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 reloc_entries 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 ((sec->flags & SEC_ALLOC) != 0
&& info->shared
#if RELATIVE_DYNAMIC_RELOCS
&& (!info->symbolic
|| is_absolute_reloc (r_type)
|| (h != NULL
&& ((h->elf.elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR) == 0
|| h->elf.root.type == bfd_link_hash_defweak)))
#endif
)
{
boolean doit;
asection *srel;
srel = sreloc;
if ((need_entry & NEED_STUBREL))
srel = stubreloc;
/* Create a reloc section in dynobj and make room for
this reloc. */
if (srel == NULL)
{
char *name;
if (dynobj == NULL)
elf_hash_table (info)->dynobj = dynobj = abfd;
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 ((need_entry & NEED_STUBREL))
{
int len = strlen (name) + sizeof (STUB_SUFFIX);
char *newname = bfd_malloc (len);
if (newname == NULL)
return false;
strcpy (newname, name);
strcpy (newname + len - sizeof (STUB_SUFFIX),
STUB_SUFFIX);
name = newname;
}
srel = bfd_get_section_by_name (dynobj, name);
if (srel == NULL)
{
flagword flags;
srel = 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 (srel == NULL
|| !bfd_set_section_flags (dynobj, srel, flags)
|| !bfd_set_section_alignment (dynobj, srel, 2))
return false;
}
else if ((need_entry & NEED_STUBREL))
free (name);
if ((need_entry & NEED_STUBREL))
stubreloc = srel;
else
sreloc = srel;
}
#if ! LONG_BRANCH_PIC_IN_SHLIB
/* If this is a function call, we only need one dynamic
reloc for the stub as all calls to a particular
function will go through the same stub. Actually, a
long branch stub needs two relocations, but we count
on some intelligence on the part of the dynamic
linker. */
if ((need_entry & NEED_STUBREL))
{
doit = h->stub_reloc_sec != stubreloc;
h->stub_reloc_sec = stubreloc;
}
else
#endif
doit = 1;
if (doit)
{
srel->_raw_size += sizeof (Elf32_External_Rela);
#if ! LONG_BRANCH_PIC_IN_SHLIB || RELATIVE_DYNAMIC_RELOCS
/* Keep track of relocations we have entered for
this global symbol, so that we can discard them
later if necessary. */
if (h != NULL
&& (0
#if RELATIVE_DYNAMIC_RELOCS
|| ! is_absolute_reloc (rtype)
#endif
|| (need_entry & NEED_STUBREL)))
{
struct elf32_hppa_dyn_reloc_entry *p;
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
for (p = h->reloc_entries; p != NULL; p = p->next)
if (p->section == srel)
break;
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
if (p == NULL)
{
p = ((struct elf32_hppa_dyn_reloc_entry *)
bfd_alloc (dynobj, sizeof *p));
if (p == NULL)
return false;
p->next = h->reloc_entries;
h->reloc_entries = p;
p->section = srel;
p->count = 0;
}
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
/* NEED_STUBREL and NEED_DYNREL are never both
set. Leave the count at zero for the
NEED_STUBREL case as we only ever have one
stub reloc per section per symbol, and this
simplifies code in hppa_discard_copies. */
if (! (need_entry & NEED_STUBREL))
++p->count;
}
#endif
}
}
}
}
2000-07-09 15:23:07 +08:00
return true;
}
2000-09-05 13:03:43 +08:00
/* Return the section that should be marked against garbage collection
for a given relocation. */
static asection *
elf32_hppa_gc_mark_hook (abfd, info, rel, h, sym)
bfd *abfd;
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
{
if (!(elf_bad_symtab (abfd)
&& ELF_ST_BIND (sym->st_info) != STB_LOCAL)
&& ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
&& sym->st_shndx != SHN_COMMON))
{
return bfd_section_from_elf_index (abfd, sym->st_shndx);
}
}
return NULL;
}
/* Update the got and plt entry reference counts for the section being
removed. */
2000-07-09 15:23:07 +08:00
static boolean
2000-09-05 13:03:43 +08:00
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;
2000-07-09 15:23:07 +08:00
{
2000-09-05 13:03:43 +08:00
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
bfd_signed_vma *local_got_refcounts;
const Elf_Internal_Rela *rel, *relend;
unsigned long r_symndx;
struct elf_link_hash_entry *h;
bfd *dynobj;
asection *sgot;
asection *srelgot;
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (abfd);
local_got_refcounts = elf_local_got_refcounts (abfd);
dynobj = elf_hash_table (info)->dynobj;
if (dynobj == NULL)
return true;
sgot = hppa_link_hash_table (info)->sgot;
srelgot = hppa_link_hash_table (info)->srelgot;
relend = relocs + sec->reloc_count;
for (rel = relocs; rel < relend; rel++)
switch ((unsigned int) ELF32_R_TYPE (rel->r_info))
{
case R_PARISC_DLTIND14F:
case R_PARISC_DLTIND14R:
case R_PARISC_DLTIND21L:
r_symndx = ELF32_R_SYM (rel->r_info);
if (r_symndx >= symtab_hdr->sh_info)
{
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
if (h->got.refcount > 0)
{
h->got.refcount -= 1;
if (h->got.refcount == 0)
{
sgot->_raw_size -= 4;
srelgot->_raw_size -= sizeof (Elf32_External_Rela);
}
}
}
else if (local_got_refcounts != NULL)
{
if (local_got_refcounts[r_symndx] > 0)
{
local_got_refcounts[r_symndx] -= 1;
if (local_got_refcounts[r_symndx] == 0)
{
sgot->_raw_size -= 4;
if (info->shared)
srelgot->_raw_size -= sizeof (Elf32_External_Rela);
}
}
}
break;
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
case R_PARISC_PLABEL14R:
case R_PARISC_PLABEL21L:
case R_PARISC_PLABEL32:
case R_PARISC_PCREL12F:
case R_PARISC_PCREL17C:
case R_PARISC_PCREL17F:
case R_PARISC_PCREL22F:
r_symndx = ELF32_R_SYM (rel->r_info);
if (r_symndx >= symtab_hdr->sh_info)
{
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
if (h->plt.refcount > 0)
h->plt.refcount -= 1;
}
break;
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
default:
break;
}
1999-05-03 15:29:11 +08:00
return true;
}
2000-09-05 13:03:43 +08:00
/* 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. */
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
static boolean
elf32_hppa_adjust_dynamic_symbol (info, h)
struct bfd_link_info *info;
struct elf_link_hash_entry *h;
1999-05-03 15:29:11 +08:00
{
2000-09-05 13:03:43 +08:00
bfd *dynobj;
struct elf32_hppa_link_hash_table *hplink;
asection *s;
dynobj = elf_hash_table (info)->dynobj;
hplink = hppa_link_hash_table (info);
/* If this is a function, put it in the procedure linkage table. We
will fill in the contents of the procedure linkage table later,
when we know the address of the .got section. */
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
&& (!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. 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->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
&& (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;
}
}
/* Make an entry in the .plt section. */
s = hplink->splt;
h->plt.offset = s->_raw_size;
s->_raw_size += PLT_ENTRY_SIZE;
if (! ((struct elf32_hppa_link_hash_entry *) h)->pic_call)
{
/* Make sure this symbol is output as a dynamic symbol. */
if (h->dynindx == -1)
{
if (! bfd_elf32_link_record_dynamic_symbol (info, h))
return false;
}
/* We also need to make an entry in the .rela.plt section. */
s = hplink->srelplt;
s->_raw_size += sizeof (Elf32_External_Rela);
}
return true;
}
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
/* 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)
2000-07-09 15:23:07 +08:00
{
2000-09-05 13:03:43 +08:00
BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
|| h->weakdef->root.type == bfd_link_hash_defweak);
h->root.u.def.section = h->weakdef->root.u.def.section;
h->root.u.def.value = h->weakdef->root.u.def.value;
return true;
}
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
/* 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;
/* 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. */
s = hplink->sdynbss;
/* 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. We need to remember the offset into the
.rela.bss section we are going to use. */
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
{
asection *srel;
srel = hplink->srelbss;
srel->_raw_size += sizeof (Elf32_External_Rela);
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
2000-07-09 15:23:07 +08:00
}
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
{
/* We need to figure out the alignment required for this symbol. I
have no idea how other ELF linkers handle this. */
unsigned int power_of_two;
power_of_two = bfd_log2 (h->size);
if (power_of_two > 3)
power_of_two = 3;
/* Apply the required alignment. */
s->_raw_size = BFD_ALIGN (s->_raw_size,
(bfd_size_type) (1 << power_of_two));
if (power_of_two > bfd_get_section_alignment (dynobj, s))
{
if (! bfd_set_section_alignment (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;
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
/* Increment the section size to make room for the symbol. */
s->_raw_size += h->size;
1999-05-03 15:29:11 +08:00
return true;
}
2000-09-05 13:03:43 +08:00
/* 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. */
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
static boolean
hppa_handle_PIC_calls (h, inf)
struct elf_link_hash_entry *h;
PTR inf;
1999-05-03 15:29:11 +08:00
{
2000-09-05 13:03:43 +08:00
struct bfd_link_info *info;
bfd *dynobj;
struct elf32_hppa_link_hash_table *hplink;
asection *s;
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))
1999-05-03 15:29:11 +08:00
{
2000-09-05 13:03:43 +08:00
h->plt.offset = (bfd_vma) -1;
h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
return true;
1999-05-03 15:29:11 +08:00
}
2000-09-05 13:03:43 +08:00
((struct elf32_hppa_link_hash_entry *) h)->pic_call = 1;
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
info = (struct bfd_link_info *) inf;
dynobj = elf_hash_table (info)->dynobj;
hplink = hppa_link_hash_table (info);
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
/* Make an entry in the .plt section. */
s = hplink->splt;
h->plt.offset = s->_raw_size;
s->_raw_size += PLT_ENTRY_SIZE;
return true;
}
#if ! LONG_BRANCH_PIC_IN_SHLIB || RELATIVE_DYNAMIC_RELOCS
/* This function is called via elf_link_hash_traverse to discard space
we allocated for relocs that it turned out we didn't need. */
static boolean
hppa_discard_copies (h, inf)
struct elf_link_hash_entry *h;
PTR inf;
{
struct elf32_hppa_dyn_reloc_entry *s;
struct elf32_hppa_link_hash_entry *eh;
struct bfd_link_info *info;
eh = (struct elf32_hppa_link_hash_entry *) h;
info = (struct bfd_link_info *) inf;
#if ! LONG_BRANCH_PIC_IN_SHLIB
/* Handle the stub reloc case. If we have a plt entry for the
function, we won't be needing long branch stubs. s->count will
only be zero for stub relocs, which provides a handy way of
flagging these relocs, and means we need do nothing special for
the forced local and symbolic link case. */
if (eh->stub_reloc_sec != NULL
&& eh->elf.plt.offset != (bfd_vma) -1)
{
for (s = eh->reloc_entries; s != NULL; s = s->next)
if (s->count == 0)
s->section->_raw_size -= sizeof (Elf32_External_Rela);
}
#endif
/* If a symbol has been forced local or we have found a regular
definition for the symbolic link case, then we won't be needing
any relocs. */
#if RELATIVE_DYNAMIC_RELOCS
if (eh->elf.dynindx == -1
|| ((eh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
&& eh->elf.root.type != bfd_link_hash_defweak
&& info->symbolic))
{
for (s = eh->reloc_entries; s != NULL; s = s->next)
s->section->_raw_size -= s->count * sizeof (Elf32_External_Rela);
}
#endif
return true;
}
#endif
/* Set the sizes of the dynamic sections. */
static boolean
elf32_hppa_size_dynamic_sections (output_bfd, info)
bfd *output_bfd;
struct bfd_link_info *info;
{
struct elf32_hppa_link_hash_table *hplink;
bfd *dynobj;
asection *s;
boolean relocs;
boolean reltext;
hplink = hppa_link_hash_table (info);
dynobj = elf_hash_table (info)->dynobj;
BFD_ASSERT (dynobj != NULL);
if (elf_hash_table (info)->dynamic_sections_created)
{
/* Set the contents of the .interp section to the interpreter. */
if (! info->shared)
{
s = bfd_get_section_by_name (dynobj, ".interp");
BFD_ASSERT (s != NULL);
s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
}
}
else
{
/* Run through the function symbols, looking for any that are
PIC, and allocate space for the necessary .plt entries so
that %r19 will be set up. */
if (! info->shared)
elf_link_hash_traverse (&hplink->root,
hppa_handle_PIC_calls,
info);
/* We may have created entries in the .rela.got section.
However, if we are not creating the dynamic sections, we will
not actually use these entries. Reset the size of .rela.got,
which will cause it to get stripped from the output file
below. */
hplink->srelgot->_raw_size = 0;
}
#if ! LONG_BRANCH_PIC_IN_SHLIB || RELATIVE_DYNAMIC_RELOCS
/* If this is a -Bsymbolic shared link, then we need to discard all
relocs against symbols defined in a regular object. We also need
to lose relocs we've allocated for long branch stubs if we know
we won't be generating a stub. */
if (info->shared)
elf_link_hash_traverse (&hplink->root,
hppa_discard_copies,
info);
#endif
/* The check_relocs and adjust_dynamic_symbol entry points have
determined the sizes of the various dynamic sections. Allocate
memory for them. */
relocs = false;
reltext = false;
for (s = dynobj->sections; s != NULL; s = s->next)
{
const char *name;
if ((s->flags & SEC_LINKER_CREATED) == 0)
continue;
/* It's OK to base decisions on the section name, because none
of the dynobj section names depend upon the input files. */
name = bfd_get_section_name (dynobj, s);
if (strncmp (name, ".rela", 5) == 0)
{
if (s->_raw_size != 0)
{
asection *target;
/* Remember whether there are any reloc sections other
than .rela.plt. */
if (strcmp (name+5, ".plt") != 0)
{
const char *outname;
relocs = true;
/* If this relocation section applies to a read only
section, then we probably need a DT_TEXTREL
entry. The entries in the .rela.plt section
really apply to the .got section, which we
created ourselves and so know is not readonly. */
outname = bfd_get_section_name (output_bfd,
s->output_section);
target = bfd_get_section_by_name (output_bfd, outname + 5);
if (target != NULL
&& (target->flags & SEC_READONLY) != 0
&& (target->flags & SEC_ALLOC) != 0)
reltext = 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 if (strcmp (name, ".plt") == 0)
;
else if (strcmp (name, ".got") == 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 (elf_hash_table (info)->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. */
if (! bfd_elf32_add_dynamic_entry (info, 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 (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0))
return false;
}
if (hplink->srelplt->_raw_size != 0)
{
if (! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0)
|| ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
|| ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0))
return false;
}
if (relocs)
{
if (! bfd_elf32_add_dynamic_entry (info, DT_RELA, 0)
|| ! bfd_elf32_add_dynamic_entry (info, DT_RELASZ, 0)
|| ! bfd_elf32_add_dynamic_entry (info, DT_RELAENT,
sizeof (Elf32_External_Rela)))
return false;
}
if (reltext)
{
if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0))
return false;
info->flags |= DF_TEXTREL;
}
}
return true;
}
/* External entry points for sizing and building linker stubs. */
/* 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. */
boolean
elf32_hppa_size_stubs (stub_bfd, multi_subspace, info,
add_stub_section, layout_sections_again)
bfd *stub_bfd;
boolean multi_subspace;
struct bfd_link_info *info;
asection * (*add_stub_section) PARAMS ((const char *, asection *));
void (*layout_sections_again) PARAMS ((void));
{
bfd *input_bfd;
asection *section;
Elf_Internal_Sym *local_syms, **all_local_syms;
unsigned int i, indx, bfd_count, sec_count;
struct elf32_hppa_link_hash_table *hplink;
boolean stub_changed = 0;
hplink = hppa_link_hash_table (info);
/* Stash our params away. */
hplink->stub_bfd = stub_bfd;
hplink->multi_subspace = multi_subspace;
hplink->add_stub_section = add_stub_section;
hplink->layout_sections_again = layout_sections_again;
/* Count the number of input BFDs and the total number of input sections. */
for (input_bfd = info->input_bfds, bfd_count = 0, sec_count = 0;
input_bfd != NULL;
input_bfd = input_bfd->link_next)
{
bfd_count += 1;
sec_count += input_bfd->section_count;
}
hplink->stub_section_created
= (asection **) bfd_zmalloc (sizeof (asection *) * sec_count);
if (hplink->stub_section_created == NULL)
return false;
#if ! LONG_BRANCH_PIC_IN_SHLIB
hplink->reloc_section_created
= (asection **) bfd_zmalloc (sizeof (asection *) * sec_count);
if (hplink->reloc_section_created == NULL)
goto error_ret_free_stub;
#endif
/* 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. */
all_local_syms
= (Elf_Internal_Sym **) bfd_zmalloc (sizeof (Elf_Internal_Sym *)
* bfd_count);
if (all_local_syms == NULL)
goto error_ret_free_reloc;
/* 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 (input_bfd = info->input_bfds, indx = 0, sec_count = 0;
input_bfd != NULL;
input_bfd = input_bfd->link_next, indx++)
{
Elf_Internal_Shdr *symtab_hdr;
Elf_Internal_Sym *isym;
Elf32_External_Sym *ext_syms, *esym;
2000-07-09 15:23:07 +08:00
1999-05-03 15:29:11 +08:00
/* We'll need the symbol table in a second. */
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
if (symtab_hdr->sh_info == 0)
continue;
2000-07-09 15:23:07 +08:00
/* We need an array of the local symbols attached to the input bfd.
Unfortunately, we're going to have to read & swap them in. */
local_syms = (Elf_Internal_Sym *)
bfd_malloc (symtab_hdr->sh_info * sizeof (Elf_Internal_Sym));
if (local_syms == NULL)
{
goto error_ret_free_local;
}
all_local_syms[indx] = local_syms;
ext_syms = (Elf32_External_Sym *)
bfd_malloc (symtab_hdr->sh_info * sizeof (Elf32_External_Sym));
if (ext_syms == NULL)
{
goto error_ret_free_local;
}
if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0
2000-09-05 13:03:43 +08:00
|| (bfd_read (ext_syms, 1,
2000-07-09 15:23:07 +08:00
(symtab_hdr->sh_info * sizeof (Elf32_External_Sym)),
input_bfd)
!= (symtab_hdr->sh_info * sizeof (Elf32_External_Sym))))
{
free (ext_syms);
goto error_ret_free_local;
}
/* Swap the local symbols in. */
isym = local_syms;
esym = ext_syms;
for (i = 0; i < symtab_hdr->sh_info; i++, esym++, isym++)
bfd_elf32_swap_symbol_in (input_bfd, esym, isym);
/* Now we can free the external symbols. */
free (ext_syms);
2000-09-05 13:03:43 +08:00
if (info->shared && hplink->multi_subspace)
{
unsigned int symndx;
unsigned int symcount;
symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
- symtab_hdr->sh_info);
/* Look through the global syms for functions; We need to
build export stubs for all globally visible functions. */
for (symndx = 0; symndx < symcount; symndx++)
{
struct elf32_hppa_link_hash_entry *hash;
hash = ((struct elf32_hppa_link_hash_entry *)
elf_sym_hashes (input_bfd)[symndx]);
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->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 (&hplink->stub_hash_table,
stub_name,
false, false);
if (stub_entry == NULL)
{
stub_entry = hppa_add_stub (stub_name,
sec,
sec_count + sec->index,
info);
if (!stub_entry)
goto error_ret_free_local;
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_get_filename (input_bfd),
stub_name);
}
}
}
sec_count += input_bfd->section_count;
}
}
2000-07-09 15:23:07 +08:00
while (1)
{
2000-09-05 13:03:43 +08:00
asection *stub_sec;
for (input_bfd = info->input_bfds, indx = 0, sec_count = 0;
input_bfd != NULL;
input_bfd = input_bfd->link_next, 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;
local_syms = all_local_syms[indx];
/* Walk over each section attached to the input bfd. */
for (section = input_bfd->sections;
section != NULL;
section = section->next, sec_count++)
{
Elf_Internal_Shdr *input_rel_hdr;
Elf32_External_Rela *external_relocs, *erelaend, *erela;
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;
/* Allocate space for the external relocations. */
external_relocs
= ((Elf32_External_Rela *)
bfd_malloc (section->reloc_count
* sizeof (Elf32_External_Rela)));
if (external_relocs == NULL)
{
goto error_ret_free_local;
}
/* Likewise for the internal relocations. */
internal_relocs = ((Elf_Internal_Rela *)
bfd_malloc (section->reloc_count
* sizeof (Elf_Internal_Rela)));
if (internal_relocs == NULL)
{
free (external_relocs);
goto error_ret_free_local;
}
/* Read in the external relocs. */
input_rel_hdr = &elf_section_data (section)->rel_hdr;
if (bfd_seek (input_bfd, input_rel_hdr->sh_offset, SEEK_SET) != 0
|| bfd_read (external_relocs, 1,
input_rel_hdr->sh_size,
input_bfd) != input_rel_hdr->sh_size)
{
free (external_relocs);
error_ret_free_internal:
free (internal_relocs);
goto error_ret_free_local;
}
/* Swap in the relocs. */
erela = external_relocs;
erelaend = erela + section->reloc_count;
irela = internal_relocs;
for (; erela < erelaend; erela++, irela++)
bfd_elf32_swap_reloca_in (input_bfd, erela, irela);
/* We're done with the external relocs, free them. */
free (external_relocs);
/* 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;
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);
goto error_ret_free_internal;
}
/* 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)))
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;
/* Get the name of this stub. */
stub_name = hppa_stub_name (section, sym_sec, hash, irela);
if (!stub_name)
goto error_ret_free_internal;
stub_entry = hppa_stub_hash_lookup (&hplink->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,
sec_count, info);
if (stub_entry == NULL)
{
free (stub_name);
goto error_ret_free_local;
}
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
&& (LONG_BRANCH_PIC_IN_SHLIB || hash == NULL))
stub_entry->stub_type = hppa_stub_long_branch_shared;
}
stub_entry->h = hash;
stub_changed = 1;
}
/* We're done with the internal relocs, free them. */
free (internal_relocs);
}
}
if (!stub_changed)
break;
/* OK, we've added some stubs. Find out the new size of the
stub sections. */
hplink->offset = (bfd_vma *)
bfd_realloc (hplink->offset,
hplink->stub_bfd->section_count * sizeof (bfd_vma));
if (hplink->offset == NULL)
goto error_ret_free_local;
memset (hplink->offset, 0,
hplink->stub_bfd->section_count * sizeof (bfd_vma));
bfd_hash_traverse (&hplink->stub_hash_table,
hppa_size_one_stub,
hplink);
for (stub_sec = hplink->stub_bfd->sections;
stub_sec != NULL;
stub_sec = stub_sec->next)
{
bfd_set_section_size (hplink->stub_bfd, stub_sec,
hplink->offset[stub_sec->index]);
}
/* Ask the linker to do its stuff. */
(*hplink->layout_sections_again) ();
stub_changed = 0;
}
/* We're done with the local symbols, free them. */
for (i = 0; i < bfd_count; i++)
if (all_local_syms[i])
free (all_local_syms[i]);
free (all_local_syms);
#if ! LONG_BRANCH_PIC_IN_SHLIB
free (hplink->reloc_section_created);
#endif
free (hplink->stub_section_created);
return true;
error_ret_free_local:
for (i = 0; i < bfd_count; i++)
if (all_local_syms[i])
free (all_local_syms[i]);
free (all_local_syms);
error_ret_free_reloc:
#if ! LONG_BRANCH_PIC_IN_SHLIB
free (hplink->reloc_section_created);
error_ret_free_stub:
#endif
free (hplink->stub_section_created);
return false;
}
/* For a final link, this function is called after we have sized the
stubs to provide a value for __gp. */
boolean
elf32_hppa_set_gp (abfd, info)
bfd *abfd;
struct bfd_link_info *info;
{
struct elf_link_hash_entry *h;
asection *sec;
bfd_vma gp_val;
h = elf_link_hash_lookup (elf_hash_table (info), "$global$",
false, false, false);
if (h != NULL && h->root.type == bfd_link_hash_defined)
{
gp_val = h->root.u.def.value;
sec = h->root.u.def.section;
}
else
{
/* If $global$ isn't defined, we make one up ourselves
from the start of .data, .plt, or .got. */
struct elf32_hppa_link_hash_table *hplink;
hplink = hppa_link_hash_table (info);
gp_val = 0;
sec = bfd_get_section_by_name (abfd, ".data");
if (sec == NULL)
sec = hplink->splt;
if (sec == NULL)
sec = hplink->sgot;
if (sec == NULL)
{
(*info->callbacks->undefined_symbol)
(info, "$global$", abfd, NULL, 0, true);
return false;
}
}
elf_gp (abfd) = (gp_val
+ sec->output_section->vma
+ sec->output_offset);
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. */
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 *hplink;
hplink = hppa_link_hash_table (info);
for (stub_sec = hplink->stub_bfd->sections;
stub_sec != NULL;
stub_sec = stub_sec->next)
{
unsigned int size;
/* Allocate memory to hold the linker stubs. */
size = bfd_section_size (hplink->stub_bfd, stub_sec);
stub_sec->contents = (unsigned char *) bfd_zalloc (hplink->stub_bfd,
size);
if (stub_sec->contents == NULL && size != 0)
return false;
}
/* Build the stubs as directed by the stub hash table. */
memset (hplink->offset, 0,
hplink->stub_bfd->section_count * sizeof (bfd_vma));
table = &hplink->stub_hash_table;
bfd_hash_traverse (table, hppa_build_one_stub, info);
return true;
}
/* Perform a relocation as part of a final link. */
static bfd_reloc_status_type
final_link_relocate (input_section, contents, rel, value, info, sym_sec, h)
asection *input_section;
bfd_byte *contents;
const Elf_Internal_Rela *rel;
bfd_vma value;
struct bfd_link_info *info;
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 is a call to a function defined in another dynamic
library, or if it is a call to a PIC function in the same
object, then find the import stub in the stub hash. */
if (sym_sec == NULL
|| sym_sec->output_section == NULL
|| (h != NULL && h->pic_call))
{
stub_entry = hppa_get_stub_entry (input_section, sym_sec,
h, rel, info);
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. Make undefined weak
branches go nowhere. */
value = location;
addend = 0;
}
else
return bfd_reloc_notsupported;
}
/* 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'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 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)
break;
if ((sym_sec->flags & SEC_CODE) != 0)
{
if ((insn & ((0x3f << 26) | (0x1f << 21)))
== (((int) OP_ADDIL << 26) | (27 << 21)))
{
insn &= ~ (0x1f << 21);
#if 1 /* debug them */
(*_bfd_error_handler)
(_("%s(%s+0x%lx): fixing %s"),
bfd_get_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;
default:
break;
}
switch (r_type)
{
case R_PARISC_DIR32:
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_DIR21L:
case R_PARISC_PCREL21L:
case R_PARISC_DPREL21L:
case R_PARISC_PLABEL21L:
case R_PARISC_DLTIND21L:
r_field = e_lrsel;
break;
case R_PARISC_DIR17R:
case R_PARISC_PCREL17R:
case R_PARISC_DIR14R:
case R_PARISC_PCREL14R:
case R_PARISC_DPREL14R:
case R_PARISC_PLABEL14R:
case R_PARISC_DLTIND14R:
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, info);
if (stub_entry == NULL)
return bfd_reloc_notsupported;
/* 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_get_filename (input_bfd),
input_section->name,
(long) rel->r_offset,
stub_entry->root.string);
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, (unsigned int) insn, hit_data);
return bfd_reloc_ok;
}
/* Relocate an HPPA ELF section. */
static 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 *dynobj;
bfd_vma *local_got_offsets;
struct elf32_hppa_link_hash_table *hplink;
Elf_Internal_Shdr *symtab_hdr;
Elf_Internal_Rela *rel;
Elf_Internal_Rela *relend;
asection *sreloc;
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
dynobj = elf_hash_table (info)->dynobj;
local_got_offsets = elf_local_got_offsets (input_bfd);
hplink = hppa_link_hash_table (info);
sreloc = NULL;
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;
boolean pltrel;
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;
r_symndx = ELF32_R_SYM (rel->r_info);
if (info->relocateable)
{
/* This is a relocateable link. We don't have to change
anything, unless the reloc is against a section symbol,
in which case we have to adjust according to where the
section symbol winds up in the output section. */
if (r_symndx < symtab_hdr->sh_info)
{
sym = local_syms + r_symndx;
if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
{
sym_sec = local_sections[r_symndx];
rel->r_addend += sym_sec->output_offset;
}
}
continue;
}
/* This is a final link. */
h = NULL;
sym = NULL;
sym_sec = NULL;
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 = ((ELF_ST_TYPE (sym->st_info) == STT_SECTION
? 0 : sym->st_value)
+ sym_sec->output_offset
+ sym_sec->output_section->vma);
}
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)
{
if (info->symbolic)
if (!((*info->callbacks->undefined_symbol)
(info, h->elf.root.root.string, input_bfd,
input_section, rel->r_offset, false)))
return false;
}
else
{
if (!((*info->callbacks->undefined_symbol)
(info, h->elf.root.root.string, input_bfd,
input_section, rel->r_offset, true)))
return false;
}
}
/* Do any required modifications to the relocation value, and
determine what types of dynamic info we need to output, if
any. */
pltrel = 0;
switch (r_type)
{
case R_PARISC_DLTIND14F:
case R_PARISC_DLTIND14R:
case R_PARISC_DLTIND21L:
/* Relocation is to the entry for this symbol in the global
offset table. */
if (h != NULL)
{
bfd_vma off;
off = h->elf.got.offset;
BFD_ASSERT (off != (bfd_vma) -1);
if (! elf_hash_table (info)->dynamic_sections_created
|| (info->shared
&& (info->symbolic || h->elf.dynindx == -1)
&& (h->elf.elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR) != 0))
{
/* This is actually a static link, or it is a
-Bsymbolic link and the symbol is defined
locally, or the symbol was forced to be local
because of a version file. We must initialize
this entry in the global offset table. Since the
offset must always be a multiple of 4, we use the
least significant bit to record whether we have
initialized it already.
When doing a dynamic link, we create a .rela.got
relocation entry to initialize the value. This
is done in the finish_dynamic_symbol routine. */
if ((off & 1) != 0)
off &= ~1;
else
{
bfd_put_32 (output_bfd, relocation,
hplink->sgot->contents + off);
h->elf.got.offset |= 1;
}
}
relocation = off;
}
else
{
/* Local symbol case. */
bfd_vma off;
BFD_ASSERT (local_got_offsets != NULL
&& local_got_offsets[r_symndx] != (bfd_vma) -1);
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
{
bfd_put_32 (output_bfd, relocation,
hplink->sgot->contents + off);
if (info->shared)
{
/* Output a dynamic SEGREL32 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;
asection *srelgot = hplink->srelgot;
outrel.r_offset = (off
+ hplink->sgot->output_offset
+ hplink->sgot->output_section->vma);
outrel.r_info = ELF32_R_INFO (0, R_PARISC_SEGREL32);
outrel.r_addend = relocation;
bfd_elf32_swap_reloca_out (output_bfd, &outrel,
((Elf32_External_Rela *)
srelgot->contents
+ srelgot->reloc_count));
++srelgot->reloc_count;
}
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
local_got_offsets[r_symndx] |= 1;
}
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
relocation = off;
}
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
/* Add the base of the GOT to the relocation value. */
relocation += (hplink->sgot->output_offset
+ hplink->sgot->output_section->vma);
break;
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
case R_PARISC_PLABEL14R:
case R_PARISC_PLABEL21L:
case R_PARISC_PLABEL32:
/* If we have a global symbol with a PLT slot, then redirect
this relocation to it. */
if (h != NULL
&& h->elf.dynindx != -1
&& h->elf.plt.offset != (bfd_vma) -1)
1999-05-03 15:29:11 +08:00
{
2000-09-05 13:03:43 +08:00
/* 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. */
relocation = (h->elf.plt.offset
+ hplink->splt->output_offset
+ hplink->splt->output_section->vma
+ 2);
pltrel = 1;
}
/* Fall through and possibly emit a dynamic relocation. */
case R_PARISC_DIR17F:
case R_PARISC_DIR17R:
case R_PARISC_DIR14R:
case R_PARISC_DIR21L:
case R_PARISC_DPREL14F:
case R_PARISC_DPREL14R:
case R_PARISC_DPREL21L:
case R_PARISC_DIR32:
/* The reloc types handled here and this conditional
expression must match the code in check_relocs and
hppa_discard_copies. 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 hppa_discard_copies. */
if ((input_section->flags & SEC_ALLOC) != 0
&& info->shared
#if RELATIVE_DYNAMIC_RELOCS
&& (is_absolute_reloc (r_type)
|| ((!info->symbolic
|| (h != NULL
&& ((h->elf.elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR) == 0
|| h->elf.root.type == bfd_link_hash_defweak)))
&& (h == NULL || h->elf.dynindx != -1)))
#endif
)
{
Elf_Internal_Rela outrel;
boolean skip;
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
/* When generating a shared object, these relocations
are copied into the output file to be resolved at run
time. */
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
if (sreloc == NULL)
2000-07-09 15:23:07 +08:00
{
2000-09-05 13:03:43 +08:00
const char *name;
name = (bfd_elf_string_from_elf_section
(input_bfd,
elf_elfheader (input_bfd)->e_shstrndx,
elf_section_data (input_section)->rel_hdr.sh_name));
if (name == NULL)
return false;
sreloc = bfd_get_section_by_name (dynobj, name);
BFD_ASSERT (sreloc != NULL);
2000-07-09 15:23:07 +08:00
}
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
outrel.r_offset = rel->r_offset;
outrel.r_addend = rel->r_addend;
skip = false;
if (elf_section_data (input_section)->stab_info != NULL)
2000-07-09 15:23:07 +08:00
{
2000-09-05 13:03:43 +08:00
bfd_vma off;
off = (_bfd_stab_section_offset
(output_bfd, &elf_hash_table (info)->stab_info,
input_section,
&elf_section_data (input_section)->stab_info,
rel->r_offset));
if (off == (bfd_vma) -1)
skip = true;
outrel.r_offset = off;
2000-07-09 15:23:07 +08:00
}
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
outrel.r_offset += (input_section->output_offset
+ input_section->output_section->vma);
if (skip)
1999-05-03 15:29:11 +08:00
{
2000-09-05 13:03:43 +08:00
memset (&outrel, 0, sizeof (outrel));
1999-05-03 15:29:11 +08:00
}
2000-09-05 13:03:43 +08:00
else if (!pltrel
&& h != NULL
&& ((!info->symbolic && h->elf.dynindx != -1)
|| (h->elf.elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR) == 0))
1999-05-03 15:29:11 +08:00
{
2000-09-05 13:03:43 +08:00
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;
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
/* Add the absolute offset of the symbol. */
outrel.r_addend += relocation;
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
if (sym_sec != NULL
&& sym_sec->output_section != NULL
&& ! bfd_is_abs_section (sym_sec))
1999-05-03 15:29:11 +08:00
{
2000-09-05 13:03:43 +08:00
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;
1999-05-03 15:29:11 +08:00
}
2000-09-05 13:03:43 +08:00
outrel.r_info = ELF32_R_INFO (indx, r_type);
}
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
bfd_elf32_swap_reloca_out (output_bfd, &outrel,
((Elf32_External_Rela *)
sreloc->contents
+ sreloc->reloc_count));
++sreloc->reloc_count;
}
break;
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
default:
break;
}
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
r = final_link_relocate (input_section, contents, rel, relocation,
info, sym_sec, h);
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
if (r == bfd_reloc_ok)
continue;
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
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);
}
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
howto = elf_hppa_howto_table + r_type;
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
if (r == bfd_reloc_undefined || r == bfd_reloc_notsupported)
{
(*_bfd_error_handler)
(_("%s(%s+0x%lx): cannot handle %s for %s"),
bfd_get_filename (input_bfd),
input_section->name,
(long) rel->r_offset,
howto->name,
sym_name);
}
else
{
if (!((*info->callbacks->reloc_overflow)
(info, sym_name, howto->name, (bfd_vma) 0,
input_bfd, input_section, rel->r_offset)))
return false;
}
}
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
return true;
}
1999-05-03 15:29:11 +08:00
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
/* Finish up dynamic symbol handling. We set the contents of various
dynamic sections here. */
1999-05-03 15:29:11 +08:00
2000-09-05 13:03:43 +08:00
static 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 *hplink;
bfd *dynobj;
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
hplink = hppa_link_hash_table (info);
dynobj = elf_hash_table (info)->dynobj;
/* Millicode symbols should not be put in the dynamic
symbol table under any circumstances. */
if (ELF_ST_TYPE (sym->st_info) == STT_PARISC_MILLI)
h->dynindx = -1;
if (h->plt.offset != (bfd_vma) -1)
{
bfd_vma value;
Elf_Internal_Rela rel;
/* This symbol has an entry in the procedure linkage table. Set
it up.
The format of a plt entry is
<funcaddr> <__gp>. */
/* We do not actually care about the value in the PLT entry if
we are creating a shared library and the symbol is still
undefined; We create a dynamic relocation to fill in the
correct value. */
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);
1999-05-03 15:29:11 +08:00
}
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
bfd_put_32 (hplink->splt->owner, value,
hplink->splt->contents + h->plt.offset);
value = elf_gp (hplink->splt->output_section->owner);
bfd_put_32 (hplink->splt->owner, value,
hplink->splt->contents + h->plt.offset + 4);
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
if (! ((struct elf32_hppa_link_hash_entry *) h)->pic_call
&& h->dynindx != -1)
{
/* Create a dynamic IPLT relocation for this entry. */
rel.r_offset = (h->plt.offset
+ hplink->splt->output_offset
+ hplink->splt->output_section->vma);
rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_IPLT);
rel.r_addend = 0;
bfd_elf32_swap_reloca_out (hplink->splt->output_section->owner,
&rel,
((Elf32_External_Rela *)
hplink->srelplt->contents
+ hplink->srelplt->reloc_count));
hplink->srelplt->reloc_count++;
}
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;
}
}
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
if (h->got.offset != (bfd_vma) -1)
{
Elf_Internal_Rela rel;
/* This symbol has an entry in the global offset table. Set it
up. */
rel.r_offset = ((h->got.offset &~ (bfd_vma) 1)
+ hplink->sgot->output_offset
+ hplink->sgot->output_section->vma);
/* If this is a static link, or it 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 (! elf_hash_table (info)->dynamic_sections_created
|| (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_SEGREL32);
rel.r_addend = (h->root.u.def.value
+ h->root.u.def.section->output_offset
+ h->root.u.def.section->output_section->vma);
}
else
{
BFD_ASSERT((h->got.offset & 1) == 0);
bfd_put_32 (output_bfd, (bfd_vma) 0,
hplink->sgot->contents + h->got.offset);
rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_DIR32);
rel.r_addend = 0;
}
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
bfd_elf32_swap_reloca_out (output_bfd, &rel,
((Elf32_External_Rela *)
hplink->srelgot->contents
+ hplink->srelgot->reloc_count));
++hplink->srelgot->reloc_count;
}
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
{
asection *s;
Elf_Internal_Rela rel;
/* This symbol needs a copy reloc. Set it up. */
BFD_ASSERT (h->dynindx != -1
&& (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak));
s = hplink->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);
bfd_elf32_swap_reloca_out (output_bfd, &rel,
((Elf32_External_Rela *) s->contents
+ s->reloc_count));
++s->reloc_count;
}
/* 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;
}
/* Finish up the dynamic sections. */
static 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 *hplink;
asection *sdyn;
dynobj = elf_hash_table (info)->dynobj;
hplink = hppa_link_hash_table (info);
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
if (elf_hash_table (info)->dynamic_sections_created)
{
Elf32_External_Dyn *dyncon, *dynconend;
BFD_ASSERT (sdyn != NULL);
dyncon = (Elf32_External_Dyn *) sdyn->contents;
dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
for (; dyncon < dynconend; dyncon++)
2000-07-09 15:23:07 +08:00
{
2000-09-05 13:03:43 +08:00
Elf_Internal_Dyn dyn;
asection *s;
bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
switch (dyn.d_tag)
{
default:
break;
case DT_PLTGOT:
/* Use PLTGOT to set the GOT register. */
dyn.d_un.d_ptr = elf_gp (output_bfd);
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
break;
case DT_JMPREL:
s = hplink->srelplt;
dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
break;
case DT_PLTRELSZ:
s = hplink->srelplt;
if (s->_cooked_size != 0)
dyn.d_un.d_val = s->_cooked_size;
else
dyn.d_un.d_val = s->_raw_size;
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
break;
}
2000-07-09 15:23:07 +08:00
}
1999-05-03 15:29:11 +08:00
}
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
/* Fill in the first entry in the global offset table.
We use it to point to our dynamic section, if we have one. */
if (hplink->sgot->_raw_size != 0)
{
bfd_put_32 (output_bfd,
(sdyn != NULL
? sdyn->output_section->vma + sdyn->output_offset
: (bfd_vma) 0),
hplink->sgot->contents);
/* Set .got entry size. */
elf_section_data (hplink->sgot->output_section)->this_hdr.sh_entsize = 4;
}
/* Set plt entry size. */
if (hplink->splt->_raw_size != 0)
elf_section_data (hplink->splt->output_section)->this_hdr.sh_entsize = 8;
1999-05-03 15:29:11 +08:00
return true;
2000-09-05 13:03:43 +08:00
}
1999-05-03 15:29:11 +08:00
2000-07-09 15:23:07 +08:00
2000-09-05 13:03:43 +08:00
/* 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;
1999-05-03 15:29:11 +08:00
}
2000-09-05 13:03:43 +08:00
1999-05-03 15:29:11 +08:00
/* Misc BFD support code. */
2000-09-05 13:03:43 +08:00
#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
1999-05-03 15:29:11 +08:00
/* Stuff for the BFD linker. */
2000-09-05 13:03:43 +08:00
#define bfd_elf32_bfd_final_link _bfd_elf32_gc_common_final_link
#define bfd_elf32_bfd_link_hash_table_create elf32_hppa_link_hash_table_create
#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_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_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_get_symbol_type elf32_hppa_elf_get_symbol_type
#define elf_backend_can_gc_sections 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 4
1999-05-03 15:29:11 +08:00
#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"