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binutils-gdb/bfd/elf64-alpha.c
Ian Lance Taylor ff12f30335 Fri Jan 3 16:58:31 1997 Richard Henderson <rth@tamu.edu> 
elf64-alpha multiple .got rewrite:

	* elf-bfd.h (struct elf_backend_data): Add always_size_sections entry.
	(bfd_elf*_mkobject): Don't define here ...
	* elfxx-target.h: ... but rather here.  Default always_size_sections
	hook to NULL.
	* elf.c (elf_mkobject): Rename to bfd_elf_mkobject, since that was
	what the #defines in elf-bfd.h transmuted it to anyway.

	* section.c: Add SEC_LINKER_CREATED flag.
	* bfd-in2.h: Rebuild.
	* elf32-i386.c (elf_i386_check_relocs): Add SEC_LINKER_CREATED to
	relocation section flags.
	(elf_i386_size_dynamic_sections): Use SEC_LINKER_CREATED instead of
	SEC_IN_MEMORY to recognize generated bits.
	* elf32-m68k.c (elf_m68k_check_relocs, elf_m68k_size_dynamic_sections):
	Likewise.
	* elf32-mips.c (mips_elf_final_link, mips_elf_create_dynamic_sections,
	mips_elf_create_compact_rel_section, mips_elf_create_got_section,
	mips_elf_check_relocs, mips_elf_size_dynamic_sections): Likewise.
	* elf32-ppc.c (ppc_elf_create_linker_section,
	ppc_elf_size_dynamic_sections): Likewise.
	* elf32-sparc.c (elf32_sparc_check_relocs,
	elf32_sparc_size_dynamic_sections): Likewise.
	* elflink.c (_bfd_elf_create_got_section): Add SEC_LINKER_CREATED to
	section flags.
	(_bfd_elf_create_dynamic_sections): Likewise.
	(_bfd_elf_make_linker_section_rela): Likewise.
	* elflink.h (elf_link_create_dynamic_sections): Likewise.
	(bfd_elf,size_dynamic_sections): Call the always_size_sections hook.
	(elf_bfd_final_link): Use SEC_LINKER_CREATED instead of SEC_IN_MEMORY
	to identify generated bits.
	(elf_link_input_bfd): Likewise.

	* elf64-alpha.c: Rewrite everything touching relocations.
1997-01-03 22:09:40 +00:00

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/* Alpha specific support for 64-bit ELF
Copyright 1996 Free Software Foundation, Inc.
Contributed by Richard Henderson <rth@tamu.edu>.
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. */
/* We need a published ABI spec for this. Until one comes out, don't
assume this'll remain unchanged forever. */
#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/alpha.h"
#define ALPHAECOFF
#define NO_COFF_RELOCS
#define NO_COFF_SYMBOLS
#define NO_COFF_LINENOS
/* Get the ECOFF swapping routines. Needed for the debug information. */
#include "coff/internal.h"
#include "coff/sym.h"
#include "coff/symconst.h"
#include "coff/ecoff.h"
#include "coff/alpha.h"
#include "aout/ar.h"
#include "libcoff.h"
#include "libecoff.h"
#define ECOFF_64
#include "ecoffswap.h"
static struct bfd_hash_entry * elf64_alpha_link_hash_newfunc
PARAMS((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
static struct bfd_link_hash_table * elf64_alpha_bfd_link_hash_table_create
PARAMS((bfd *));
static bfd_reloc_status_type elf64_alpha_reloc_nil
PARAMS((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
static bfd_reloc_status_type elf64_alpha_reloc_bad
PARAMS((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
static bfd_reloc_status_type elf64_alpha_do_reloc_gpdisp
PARAMS((bfd *, bfd_vma, bfd_byte *, bfd_byte *));
static bfd_reloc_status_type elf64_alpha_reloc_gpdisp
PARAMS((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
static reloc_howto_type * elf64_alpha_bfd_reloc_type_lookup
PARAMS((bfd *, bfd_reloc_code_real_type));
static void elf64_alpha_info_to_howto
PARAMS((bfd *, arelent *, Elf64_Internal_Rela *));
static boolean elf64_alpha_object_p
PARAMS((bfd *));
static boolean elf64_alpha_section_from_shdr
PARAMS((bfd *, Elf64_Internal_Shdr *, char *));
static boolean elf64_alpha_fake_sections
PARAMS((bfd *, Elf64_Internal_Shdr *, asection *));
static int elf64_alpha_additional_program_headers
PARAMS((bfd *));
static boolean elf64_alpha_create_got_section
PARAMS((bfd *, struct bfd_link_info *));
static boolean elf64_alpha_create_dynamic_sections
PARAMS((bfd *, struct bfd_link_info *));
static boolean elf64_alpha_read_ecoff_info
PARAMS((bfd *, asection *, struct ecoff_debug_info *));
static boolean elf64_alpha_is_local_label
PARAMS((bfd *, asymbol *));
static boolean elf64_alpha_find_nearest_line
PARAMS((bfd *, asection *, asymbol **, bfd_vma, const char **,
const char **, unsigned int *));
#if defined(__STDC__) || defined(ALMOST_STDC)
struct alpha_elf_link_hash_entry;
#endif
static boolean elf64_alpha_output_extsym
PARAMS((struct alpha_elf_link_hash_entry *, PTR));
static boolean elf64_alpha_can_merge_gots
PARAMS((bfd *, bfd *));
static void elf64_alpha_merge_gots
PARAMS((bfd *, bfd *));
static boolean elf64_alpha_check_relocs
PARAMS((bfd *, struct bfd_link_info *, asection *sec,
const Elf_Internal_Rela *));
static boolean elf64_alpha_adjust_dynamic_symbol
PARAMS((struct bfd_link_info *, struct elf_link_hash_entry *));
static boolean elf64_alpha_size_dynamic_sections
PARAMS((bfd *, struct bfd_link_info *));
static boolean elf64_alpha_adjust_dynindx
PARAMS((struct elf_link_hash_entry *, PTR));
static boolean elf64_alpha_relocate_section
PARAMS((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
static boolean elf64_alpha_finish_dynamic_symbol
PARAMS((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
Elf_Internal_Sym *));
static boolean elf64_alpha_finish_dynamic_sections
PARAMS((bfd *, struct bfd_link_info *));
static boolean elf64_alpha_final_link
PARAMS((bfd *, struct bfd_link_info *));
struct alpha_elf_link_hash_entry
{
struct elf_link_hash_entry root;
/* External symbol information. */
EXTR esym;
/* Cumulative flags for all the .got entries. */
int flags;
/* Contexts (LITUSE) in which a literal was referenced. */
#define ALPHA_ELF_LINK_HASH_LU_ADDR 0x01
#define ALPHA_ELF_LINK_HASH_LU_MEM 0x02
#define ALPHA_ELF_LINK_HASH_LU_BYTE 0x04
#define ALPHA_ELF_LINK_HASH_LU_FUNC 0x08
/* Used to implement multiple .got subsections. */
struct alpha_elf_got_entry
{
struct alpha_elf_got_entry *next;
/* which .got subsection? */
bfd *gotobj;
/* the addend in effect for this entry. */
bfd_vma addend;
/* the .got offset for this entry. */
int got_offset;
int flags;
/* An additional flag. */
#define ALPHA_ELF_GOT_ENTRY_RELOCS_DONE 0x10
} *got_entries;
/* used to count non-got, non-plt relocations for delayed sizing
of relocation sections. */
struct alpha_elf_reloc_entry
{
struct alpha_elf_reloc_entry *next;
/* which .reloc section? */
asection *srel;
/* what kind of relocation? */
unsigned long rtype;
/* how many did we find? */
unsigned long count;
} *reloc_entries;
};
/* Alpha ELF linker hash table. */
struct alpha_elf_link_hash_table
{
struct elf_link_hash_table root;
/* The head of a list of .got subsections linked through
alpha_elf_tdata(abfd)->got_link_next. */
bfd *got_list;
};
/* Look up an entry in a Alpha ELF linker hash table. */
#define alpha_elf_link_hash_lookup(table, string, create, copy, follow) \
((struct alpha_elf_link_hash_entry *) \
elf_link_hash_lookup (&(table)->root, (string), (create), \
(copy), (follow)))
/* Traverse a Alpha ELF linker hash table. */
#define alpha_elf_link_hash_traverse(table, func, info) \
(elf_link_hash_traverse \
(&(table)->root, \
(boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
(info)))
/* Get the Alpha ELF linker hash table from a link_info structure. */
#define alpha_elf_hash_table(p) \
((struct alpha_elf_link_hash_table *) ((p)->hash))
/* Get the object's symbols as our own entry type. */
#define alpha_elf_sym_hashes(abfd) \
((struct alpha_elf_link_hash_entry **)elf_sym_hashes(abfd))
/* Should we do dynamic things to this symbol? */
#define alpha_elf_dynamic_symbol_p(h, info) \
(((info)->shared && !(info)->symbolic) \
|| (((h)->elf_link_hash_flags \
& (ELF_LINK_HASH_DEF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR)) \
== (ELF_LINK_HASH_DEF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR)))
/* Create an entry in a Alpha ELF linker hash table. */
static struct bfd_hash_entry *
elf64_alpha_link_hash_newfunc (entry, table, string)
struct bfd_hash_entry *entry;
struct bfd_hash_table *table;
const char *string;
{
struct alpha_elf_link_hash_entry *ret =
(struct alpha_elf_link_hash_entry *) entry;
/* Allocate the structure if it has not already been allocated by a
subclass. */
if (ret == (struct alpha_elf_link_hash_entry *) NULL)
ret = ((struct alpha_elf_link_hash_entry *)
bfd_hash_allocate (table,
sizeof (struct alpha_elf_link_hash_entry)));
if (ret == (struct alpha_elf_link_hash_entry *) NULL)
return (struct bfd_hash_entry *) ret;
/* Call the allocation method of the superclass. */
ret = ((struct alpha_elf_link_hash_entry *)
_bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
table, string));
if (ret != (struct alpha_elf_link_hash_entry *) NULL)
{
/* Set local fields. */
memset (&ret->esym, 0, sizeof (EXTR));
/* We use -2 as a marker to indicate that the information has
not been set. -1 means there is no associated ifd. */
ret->esym.ifd = -2;
ret->flags = 0;
ret->got_entries = NULL;
ret->reloc_entries = NULL;
}
return (struct bfd_hash_entry *) ret;
}
/* Create a Alpha ELF linker hash table. */
static struct bfd_link_hash_table *
elf64_alpha_bfd_link_hash_table_create (abfd)
bfd *abfd;
{
struct alpha_elf_link_hash_table *ret;
ret = ((struct alpha_elf_link_hash_table *)
bfd_zalloc (abfd, sizeof (struct alpha_elf_link_hash_table)));
if (ret == (struct alpha_elf_link_hash_table *) NULL)
return NULL;
if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
elf64_alpha_link_hash_newfunc))
{
bfd_release (abfd, ret);
return NULL;
}
return &ret->root.root;
}
/* We have some private fields hanging off of the elf_tdata structure. */
struct alpha_elf_obj_tdata
{
struct elf_obj_tdata root;
/* For every input file, these are the got entries for that object's
local symbols. */
struct alpha_elf_got_entry ** local_got_entries;
/* For every input file, this is the object that owns the got that
this input file uses. */
bfd *gotobj;
/* For every got, this is a linked list through the objects using this got */
bfd *in_got_link_next;
/* For every got, this is a link to the next got subsegment. */
bfd *got_link_next;
/* For every got, this is the section. */
asection *got;
/* For every got, this is it's total number of *entries*. */
int total_got_entries;
/* For every got, this is the sum of the number of *entries* required
to hold all of the member object's local got. */
int n_local_got_entries;
};
#define alpha_elf_tdata(abfd) \
((struct alpha_elf_obj_tdata *) (abfd)->tdata.any)
static boolean
elf64_alpha_mkobject (abfd)
bfd *abfd;
{
abfd->tdata.any = bfd_zalloc (abfd, sizeof (struct alpha_elf_obj_tdata));
if (abfd->tdata.any == NULL)
return false;
return true;
}
/* In case we're on a 32-bit machine, construct a 64-bit "-1" value
from smaller values. Start with zero, widen, *then* decrement. */
#define MINUS_ONE (((bfd_vma)0) - 1)
static reloc_howto_type elf64_alpha_howto_table[] =
{
HOWTO (R_ALPHA_NONE, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
8, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
elf64_alpha_reloc_nil, /* special_function */
"NONE", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
true), /* pcrel_offset */
/* A 32 bit reference to a symbol. */
HOWTO (R_ALPHA_REFLONG, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
0, /* special_function */
"REFLONG", /* name */
false, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
false), /* pcrel_offset */
/* A 64 bit reference to a symbol. */
HOWTO (R_ALPHA_REFQUAD, /* type */
0, /* rightshift */
4, /* size (0 = byte, 1 = short, 2 = long) */
64, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
0, /* special_function */
"REFQUAD", /* name */
false, /* partial_inplace */
MINUS_ONE, /* src_mask */
MINUS_ONE, /* dst_mask */
false), /* pcrel_offset */
/* A 32 bit GP relative offset. This is just like REFLONG except
that when the value is used the value of the gp register will be
added in. */
HOWTO (R_ALPHA_GPREL32, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
0, /* special_function */
"GPREL32", /* name */
false, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
false), /* pcrel_offset */
/* Used for an instruction that refers to memory off the GP register. */
HOWTO (R_ALPHA_LITERAL, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
0, /* special_function */
"ELF_LITERAL", /* name */
false, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* This reloc only appears immediately following an ELF_LITERAL reloc.
It identifies a use of the literal. The symbol index is special:
1 means the literal address is in the base register of a memory
format instruction; 2 means the literal address is in the byte
offset register of a byte-manipulation instruction; 3 means the
literal address is in the target register of a jsr instruction.
This does not actually do any relocation. */
HOWTO (R_ALPHA_LITUSE, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
elf64_alpha_reloc_nil, /* special_function */
"LITUSE", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
false), /* pcrel_offset */
/* Load the gp register. This is always used for a ldah instruction
which loads the upper 16 bits of the gp register. The symbol
index of the GPDISP instruction is an offset in bytes to the lda
instruction that loads the lower 16 bits. The value to use for
the relocation is the difference between the GP value and the
current location; the load will always be done against a register
holding the current address.
NOTE: Unlike ECOFF, partial in-place relocation is not done. If
any offset is present in the instructions, it is an offset from
the register to the ldah instruction. This lets us avoid any
stupid hackery like inventing a gp value to do partial relocation
against. Also unlike ECOFF, we do the whole relocation off of
the GPDISP rather than a GPDISP_HI16/GPDISP_LO16 pair. An odd,
space consuming bit, that, since all the information was present
in the GPDISP_HI16 reloc. */
HOWTO (R_ALPHA_GPDISP, /* type */
16, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
elf64_alpha_reloc_gpdisp, /* special_function */
"GPDISP", /* name */
false, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
true), /* pcrel_offset */
/* A 21 bit branch. */
HOWTO (R_ALPHA_BRADDR, /* type */
2, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
21, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
0, /* special_function */
"BRADDR", /* name */
false, /* partial_inplace */
0x1fffff, /* src_mask */
0x1fffff, /* dst_mask */
true), /* pcrel_offset */
/* A hint for a jump to a register. */
HOWTO (R_ALPHA_HINT, /* type */
2, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
14, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
0, /* special_function */
"HINT", /* name */
false, /* partial_inplace */
0x3fff, /* src_mask */
0x3fff, /* dst_mask */
true), /* pcrel_offset */
/* 16 bit PC relative offset. */
HOWTO (R_ALPHA_SREL16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
0, /* special_function */
"SREL16", /* name */
false, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* 32 bit PC relative offset. */
HOWTO (R_ALPHA_SREL32, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
0, /* special_function */
"SREL32", /* name */
false, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
false), /* pcrel_offset */
/* A 64 bit PC relative offset. */
HOWTO (R_ALPHA_SREL64, /* type */
0, /* rightshift */
4, /* size (0 = byte, 1 = short, 2 = long) */
64, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
0, /* special_function */
"SREL64", /* name */
false, /* partial_inplace */
MINUS_ONE, /* src_mask */
MINUS_ONE, /* dst_mask */
false), /* pcrel_offset */
/* Push a value on the reloc evaluation stack. */
HOWTO (ALPHA_R_OP_PUSH, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
elf64_alpha_reloc_bad, /* special_function */
"OP_PUSH", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
false), /* pcrel_offset */
/* Store the value from the stack at the given address. Store it in
a bitfield of size r_size starting at bit position r_offset. */
HOWTO (ALPHA_R_OP_STORE, /* type */
0, /* rightshift */
4, /* size (0 = byte, 1 = short, 2 = long) */
64, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
elf64_alpha_reloc_bad, /* special_function */
"OP_STORE", /* name */
false, /* partial_inplace */
0, /* src_mask */
MINUS_ONE, /* dst_mask */
false), /* pcrel_offset */
/* Subtract the reloc address from the value on the top of the
relocation stack. */
HOWTO (ALPHA_R_OP_PSUB, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
elf64_alpha_reloc_bad, /* special_function */
"OP_PSUB", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
false), /* pcrel_offset */
/* Shift the value on the top of the relocation stack right by the
given value. */
HOWTO (ALPHA_R_OP_PRSHIFT, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
elf64_alpha_reloc_bad, /* special_function */
"OP_PRSHIFT", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
false), /* pcrel_offset */
/* Misc ELF relocations. */
HOWTO (R_ALPHA_COPY,
0,
0,
0,
false,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"COPY",
false,
0,
0,
true),
HOWTO (R_ALPHA_GLOB_DAT,
0,
0,
0,
false,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"GLOB_DAT",
false,
0,
0,
true),
HOWTO (R_ALPHA_JMP_SLOT,
0,
0,
0,
false,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"JMP_SLOT",
false,
0,
0,
true),
HOWTO (R_ALPHA_RELATIVE,
0,
0,
0,
false,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"RELATIVE",
false,
0,
0,
true)
};
/* A relocation function which doesn't do anything. */
static bfd_reloc_status_type
elf64_alpha_reloc_nil (abfd, reloc, sym, data, sec, output_bfd, error_message)
bfd *abfd;
arelent *reloc;
asymbol *sym;
PTR data;
asection *sec;
bfd *output_bfd;
char **error_message;
{
if (output_bfd)
reloc->address += sec->output_offset;
return bfd_reloc_ok;
}
/* A relocation function used for an unsupported reloc. */
static bfd_reloc_status_type
elf64_alpha_reloc_bad (abfd, reloc, sym, data, sec, output_bfd, error_message)
bfd *abfd;
arelent *reloc;
asymbol *sym;
PTR data;
asection *sec;
bfd *output_bfd;
char **error_message;
{
if (output_bfd)
reloc->address += sec->output_offset;
return bfd_reloc_notsupported;
}
/* Do the work of the GPDISP relocation. */
static bfd_reloc_status_type
elf64_alpha_do_reloc_gpdisp (abfd, gpdisp, p_ldah, p_lda)
bfd *abfd;
bfd_vma gpdisp;
bfd_byte *p_ldah;
bfd_byte *p_lda;
{
bfd_reloc_status_type ret = bfd_reloc_ok;
bfd_vma addend;
unsigned long i_ldah, i_lda;
i_ldah = bfd_get_32 (abfd, p_ldah);
i_lda = bfd_get_32 (abfd, p_lda);
/* Complain if the instructions are not correct. */
if (((i_ldah >> 26) & 0x3f) != 0x09
|| ((i_lda >> 26) & 0x3f) != 0x08)
ret = bfd_reloc_dangerous;
/* Extract the user-supplied offset, mirroring the sign extensions
that the instructions perform. */
addend = ((i_ldah & 0xffff) << 16) | (i_lda & 0xffff);
addend = (addend ^ 0x80008000) - 0x80008000;
gpdisp += addend;
if ((bfd_signed_vma) gpdisp < -(bfd_signed_vma)0x80000000
|| gpdisp >= 0x7fff8000)
ret = bfd_reloc_overflow;
/* compensate for the sign extension again. */
i_ldah = ((i_ldah & 0xffff0000)
| (((gpdisp >> 16) + ((gpdisp >> 15) & 1)) & 0xffff));
i_lda = (i_lda & 0xffff0000) | (gpdisp & 0xffff);
bfd_put_32 (abfd, i_ldah, p_ldah);
bfd_put_32 (abfd, i_lda, p_lda);
return ret;
}
/* The special function for the GPDISP reloc. */
static bfd_reloc_status_type
elf64_alpha_reloc_gpdisp (abfd, reloc_entry, sym, data, input_section,
output_bfd, err_msg)
bfd *abfd;
arelent *reloc_entry;
asymbol *sym;
PTR data;
asection *input_section;
bfd *output_bfd;
char **err_msg;
{
bfd_reloc_status_type ret;
bfd_vma gp, relocation;
bfd_byte *p_ldah, *p_lda;
/* Don't do anything if we're not doing a final link. */
if (output_bfd)
{
reloc_entry->address += input_section->output_offset;
return bfd_reloc_ok;
}
if (reloc_entry->address > input_section->_cooked_size ||
reloc_entry->address + reloc_entry->addend > input_section->_cooked_size)
return bfd_reloc_outofrange;
/* The gp used in the portion of the output object to which this
input object belongs is cached on the input bfd. */
gp = _bfd_get_gp_value (abfd);
relocation = (input_section->output_section->vma
+ input_section->output_offset
+ reloc_entry->address);
p_ldah = (bfd_byte *) data + reloc_entry->address;
p_lda = p_ldah + reloc_entry->addend;
ret = elf64_alpha_do_reloc_gpdisp (abfd, gp - relocation, p_ldah, p_lda);
/* Complain if the instructions are not correct. */
if (ret == bfd_reloc_dangerous)
*err_msg = "GPDISP relocation did not find ldah and lda instructions";
return ret;
}
/* A mapping from BFD reloc types to Alpha ELF reloc types. */
struct elf_reloc_map
{
bfd_reloc_code_real_type bfd_reloc_val;
int elf_reloc_val;
};
static const struct elf_reloc_map elf64_alpha_reloc_map[] =
{
{BFD_RELOC_NONE, R_ALPHA_NONE},
{BFD_RELOC_32, R_ALPHA_REFLONG},
{BFD_RELOC_64, R_ALPHA_REFQUAD},
{BFD_RELOC_CTOR, R_ALPHA_REFQUAD},
{BFD_RELOC_GPREL32, R_ALPHA_GPREL32},
{BFD_RELOC_ALPHA_ELF_LITERAL, R_ALPHA_LITERAL},
{BFD_RELOC_ALPHA_LITUSE, R_ALPHA_LITUSE},
{BFD_RELOC_ALPHA_GPDISP, R_ALPHA_GPDISP},
{BFD_RELOC_23_PCREL_S2, R_ALPHA_BRADDR},
{BFD_RELOC_ALPHA_HINT, R_ALPHA_HINT},
{BFD_RELOC_16_PCREL, R_ALPHA_SREL16},
{BFD_RELOC_32_PCREL, R_ALPHA_SREL32},
{BFD_RELOC_64_PCREL, R_ALPHA_SREL64},
};
/* Given a BFD reloc type, return a HOWTO structure. */
static reloc_howto_type *
elf64_alpha_bfd_reloc_type_lookup (abfd, code)
bfd *abfd;
bfd_reloc_code_real_type code;
{
const struct elf_reloc_map *i, *e;
i = e = elf64_alpha_reloc_map;
e += sizeof (elf64_alpha_reloc_map) / sizeof (struct elf_reloc_map);
for (; i != e; ++i)
{
if (i->bfd_reloc_val == code)
return &elf64_alpha_howto_table[i->elf_reloc_val];
}
return 0;
}
/* Given an Alpha ELF reloc type, fill in an arelent structure. */
static void
elf64_alpha_info_to_howto (abfd, cache_ptr, dst)
bfd *abfd;
arelent *cache_ptr;
Elf64_Internal_Rela *dst;
{
unsigned r_type;
r_type = ELF64_R_TYPE(dst->r_info);
BFD_ASSERT (r_type < (unsigned int) R_ALPHA_max);
cache_ptr->howto = &elf64_alpha_howto_table[r_type];
}
/* PLT/GOT Stuff */
#define PLT_HEADER_SIZE 32
#define PLT_HEADER_WORD1 0xc3600000 /* br $27,.+4 */
#define PLT_HEADER_WORD2 0xa77b000c /* ldq $27,12($27) */
#define PLT_HEADER_WORD3 0x47ff041f /* nop */
#define PLT_HEADER_WORD4 0x6b7b0000 /* jmp $27,($27) */
#define PLT_ENTRY_SIZE 12
#define PLT_ENTRY_WORD1 0x279f0000 /* ldah $28, 0($31) */
#define PLT_ENTRY_WORD2 0x239c0000 /* lda $28, 0($28) */
#define PLT_ENTRY_WORD3 0xc3e00000 /* br $31, plt0 */
#define MAX_GOT_ENTRIES (64*1024 / 8)
#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so"
/* Set the right machine number for an Alpha ELF file. */
static boolean
elf64_alpha_object_p (abfd)
bfd *abfd;
{
return bfd_default_set_arch_mach (abfd, bfd_arch_alpha, 0);
}
/* Handle an Alpha specific section when reading an object file. This
is called when elfcode.h finds a section with an unknown type.
FIXME: We need to handle the SHF_MIPS_GPREL flag, but I'm not sure
how to. */
static boolean
elf64_alpha_section_from_shdr (abfd, hdr, name)
bfd *abfd;
Elf64_Internal_Shdr *hdr;
char *name;
{
asection *newsect;
/* There ought to be a place to keep ELF backend specific flags, but
at the moment there isn't one. We just keep track of the
sections by their name, instead. Fortunately, the ABI gives
suggested names for all the MIPS specific sections, so we will
probably get away with this. */
switch (hdr->sh_type)
{
case SHT_ALPHA_DEBUG:
if (strcmp (name, ".mdebug") != 0)
return false;
break;
#ifdef ERIC_neverdef
case SHT_ALPHA_REGINFO:
if (strcmp (name, ".reginfo") != 0
|| hdr->sh_size != sizeof (Elf64_External_RegInfo))
return false;
break;
#endif
default:
return false;
}
if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
return false;
newsect = hdr->bfd_section;
if (hdr->sh_type == SHT_ALPHA_DEBUG)
{
if (! bfd_set_section_flags (abfd, newsect,
(bfd_get_section_flags (abfd, newsect)
| SEC_DEBUGGING)))
return false;
}
#ifdef ERIC_neverdef
/* For a .reginfo section, set the gp value in the tdata information
from the contents of this section. We need the gp value while
processing relocs, so we just get it now. */
if (hdr->sh_type == SHT_ALPHA_REGINFO)
{
Elf64_External_RegInfo ext;
Elf64_RegInfo s;
if (! bfd_get_section_contents (abfd, newsect, (PTR) &ext,
(file_ptr) 0, sizeof ext))
return false;
bfd_alpha_elf64_swap_reginfo_in (abfd, &ext, &s);
elf_gp (abfd) = s.ri_gp_value;
}
#endif
return true;
}
/* Set the correct type for an Alpha ELF section. We do this by the
section name, which is a hack, but ought to work. */
static boolean
elf64_alpha_fake_sections (abfd, hdr, sec)
bfd *abfd;
Elf64_Internal_Shdr *hdr;
asection *sec;
{
register const char *name;
name = bfd_get_section_name (abfd, sec);
if (strcmp (name, ".mdebug") == 0)
{
hdr->sh_type = SHT_ALPHA_DEBUG;
/* In a shared object on Irix 5.3, the .mdebug section has an
entsize of 0. FIXME: Does this matter? */
if ((abfd->flags & DYNAMIC) != 0 )
hdr->sh_entsize = 0;
else
hdr->sh_entsize = 1;
}
#ifdef ERIC_neverdef
else if (strcmp (name, ".reginfo") == 0)
{
hdr->sh_type = SHT_ALPHA_REGINFO;
/* In a shared object on Irix 5.3, the .reginfo section has an
entsize of 0x18. FIXME: Does this matter? */
if ((abfd->flags & DYNAMIC) != 0)
hdr->sh_entsize = sizeof (Elf64_External_RegInfo);
else
hdr->sh_entsize = 1;
/* Force the section size to the correct value, even if the
linker thinks it is larger. The link routine below will only
write out this much data for .reginfo. */
hdr->sh_size = sec->_raw_size = sizeof (Elf64_External_RegInfo);
}
else if (strcmp (name, ".hash") == 0
|| strcmp (name, ".dynamic") == 0
|| strcmp (name, ".dynstr") == 0)
{
hdr->sh_entsize = 0;
hdr->sh_info = SIZEOF_ALPHA_DYNSYM_SECNAMES;
}
#endif
else if (strcmp (name, ".sdata") == 0
|| strcmp (name, ".sbss") == 0
|| strcmp (name, ".lit4") == 0
|| strcmp (name, ".lit8") == 0)
hdr->sh_flags |= SHF_ALPHA_GPREL;
return true;
}
/* Return the number of additional phdrs we will need. */
static int
elf64_alpha_additional_program_headers (abfd)
bfd *abfd;
{
asection *s;
int ret;
ret = 0;
s = bfd_get_section_by_name (abfd, ".reginfo");
if (s != NULL && (s->flags & SEC_LOAD) != 0)
{
/* We need a PT_ALPHA_REGINFO segment. */
++ret;
}
if (bfd_get_section_by_name (abfd, ".dynamic") != NULL
&& bfd_get_section_by_name (abfd, ".mdebug") != NULL)
{
/* We need a PT_ALPHA_RTPROC segment. */
++ret;
}
return ret;
}
/* Create the .got section. */
static boolean
elf64_alpha_create_got_section(abfd, info)
bfd *abfd;
struct bfd_link_info *info;
{
asection *s;
if (bfd_get_section_by_name (abfd, ".got"))
return true;
s = bfd_make_section (abfd, ".got");
if (s == NULL
|| !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
| SEC_LINKER_CREATED))
|| !bfd_set_section_alignment (abfd, s, 3))
return false;
alpha_elf_tdata (abfd)->got = s;
return true;
}
/* Create all the dynamic sections. */
static boolean
elf64_alpha_create_dynamic_sections (abfd, info)
bfd *abfd;
struct bfd_link_info *info;
{
asection *s;
struct elf_link_hash_entry *h;
/* We need to create .plt, .rela.plt, .got, and .rela.got sections. */
s = bfd_make_section (abfd, ".plt");
if (s == NULL
|| ! bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
| SEC_LINKER_CREATED
| SEC_CODE))
|| ! bfd_set_section_alignment (abfd, s, 3))
return false;
/* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
.plt section. */
h = NULL;
if (! (_bfd_generic_link_add_one_symbol
(info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
(bfd_vma) 0, (const char *) NULL, false,
get_elf_backend_data (abfd)->collect,
(struct bfd_link_hash_entry **) &h)))
return false;
h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
h->type = STT_OBJECT;
if (info->shared
&& ! _bfd_elf_link_record_dynamic_symbol (info, h))
return false;
s = bfd_make_section (abfd, ".rela.plt");
if (s == NULL
|| !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
| SEC_LINKER_CREATED
| SEC_READONLY))
|| ! bfd_set_section_alignment (abfd, s, 3))
return false;
/* We may or may not have created a .got section for this object, but
we definitely havn't done the rest of the work. */
if (!elf64_alpha_create_got_section (abfd, info))
return false;
s = bfd_make_section(abfd, ".rela.got");
if (s == NULL
|| !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
| SEC_LINKER_CREATED
| SEC_READONLY))
|| !bfd_set_section_alignment (abfd, s, 3))
return false;
/* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the
dynobj's .got section. We don't do this in the linker script
because we don't want to define the symbol if we are not creating
a global offset table. */
h = NULL;
if (!(_bfd_generic_link_add_one_symbol
(info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL,
alpha_elf_tdata(abfd)->got, (bfd_vma) 0, (const char *) NULL,
false, get_elf_backend_data (abfd)->collect,
(struct bfd_link_hash_entry **) &h)))
return false;
h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
h->type = STT_OBJECT;
if (info->shared
&& ! _bfd_elf_link_record_dynamic_symbol (info, h))
return false;
elf_hash_table (info)->hgot = h;
return true;
}
/* Read ECOFF debugging information from a .mdebug section into a
ecoff_debug_info structure. */
static boolean
elf64_alpha_read_ecoff_info (abfd, section, debug)
bfd *abfd;
asection *section;
struct ecoff_debug_info *debug;
{
HDRR *symhdr;
const struct ecoff_debug_swap *swap;
char *ext_hdr = NULL;
swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
ext_hdr = (char *) bfd_malloc ((size_t) swap->external_hdr_size);
if (ext_hdr == NULL && swap->external_hdr_size != 0)
goto error_return;
if (bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0,
swap->external_hdr_size)
== false)
goto error_return;
symhdr = &debug->symbolic_header;
(*swap->swap_hdr_in) (abfd, ext_hdr, symhdr);
/* The symbolic header contains absolute file offsets and sizes to
read. */
#define READ(ptr, offset, count, size, type) \
if (symhdr->count == 0) \
debug->ptr = NULL; \
else \
{ \
debug->ptr = (type) bfd_malloc ((size_t) (size * symhdr->count)); \
if (debug->ptr == NULL) \
goto error_return; \
if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \
|| (bfd_read (debug->ptr, size, symhdr->count, \
abfd) != size * symhdr->count)) \
goto error_return; \
}
READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *);
READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, PTR);
READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, PTR);
READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, PTR);
READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, PTR);
READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext),
union aux_ext *);
READ (ss, cbSsOffset, issMax, sizeof (char), char *);
READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *);
READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, PTR);
READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, PTR);
READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, PTR);
#undef READ
debug->fdr = NULL;
debug->adjust = NULL;
return true;
error_return:
if (ext_hdr != NULL)
free (ext_hdr);
if (debug->line != NULL)
free (debug->line);
if (debug->external_dnr != NULL)
free (debug->external_dnr);
if (debug->external_pdr != NULL)
free (debug->external_pdr);
if (debug->external_sym != NULL)
free (debug->external_sym);
if (debug->external_opt != NULL)
free (debug->external_opt);
if (debug->external_aux != NULL)
free (debug->external_aux);
if (debug->ss != NULL)
free (debug->ss);
if (debug->ssext != NULL)
free (debug->ssext);
if (debug->external_fdr != NULL)
free (debug->external_fdr);
if (debug->external_rfd != NULL)
free (debug->external_rfd);
if (debug->external_ext != NULL)
free (debug->external_ext);
return false;
}
/* Alpha ELF local labels start with '$'. */
static boolean
elf64_alpha_is_local_label (abfd, symbol)
bfd *abfd;
asymbol *symbol;
{
return symbol->name[0] == '$';
}
/* Alpha ELF follows MIPS ELF in using a special find_nearest_line
routine in order to handle the ECOFF debugging information. We
still call this mips_elf_find_line because of the slot
find_line_info in elf_obj_tdata is declared that way. */
struct mips_elf_find_line
{
struct ecoff_debug_info d;
struct ecoff_find_line i;
};
static boolean
elf64_alpha_find_nearest_line (abfd, section, symbols, offset, filename_ptr,
functionname_ptr, line_ptr)
bfd *abfd;
asection *section;
asymbol **symbols;
bfd_vma offset;
const char **filename_ptr;
const char **functionname_ptr;
unsigned int *line_ptr;
{
asection *msec;
msec = bfd_get_section_by_name (abfd, ".mdebug");
if (msec != NULL)
{
flagword origflags;
struct mips_elf_find_line *fi;
const struct ecoff_debug_swap * const swap =
get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
/* If we are called during a link, alpha_elf_final_link may have
cleared the SEC_HAS_CONTENTS field. We force it back on here
if appropriate (which it normally will be). */
origflags = msec->flags;
if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS)
msec->flags |= SEC_HAS_CONTENTS;
fi = elf_tdata (abfd)->find_line_info;
if (fi == NULL)
{
bfd_size_type external_fdr_size;
char *fraw_src;
char *fraw_end;
struct fdr *fdr_ptr;
fi = ((struct mips_elf_find_line *)
bfd_zalloc (abfd, sizeof (struct mips_elf_find_line)));
if (fi == NULL)
{
msec->flags = origflags;
return false;
}
if (!elf64_alpha_read_ecoff_info (abfd, msec, &fi->d))
{
msec->flags = origflags;
return false;
}
/* Swap in the FDR information. */
fi->d.fdr = ((struct fdr *)
bfd_alloc (abfd,
(fi->d.symbolic_header.ifdMax *
sizeof (struct fdr))));
if (fi->d.fdr == NULL)
{
msec->flags = origflags;
return false;
}
external_fdr_size = swap->external_fdr_size;
fdr_ptr = fi->d.fdr;
fraw_src = (char *) fi->d.external_fdr;
fraw_end = (fraw_src
+ fi->d.symbolic_header.ifdMax * external_fdr_size);
for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++)
(*swap->swap_fdr_in) (abfd, (PTR) fraw_src, fdr_ptr);
elf_tdata (abfd)->find_line_info = fi;
/* Note that we don't bother to ever free this information.
find_nearest_line is either called all the time, as in
objdump -l, so the information should be saved, or it is
rarely called, as in ld error messages, so the memory
wasted is unimportant. Still, it would probably be a
good idea for free_cached_info to throw it away. */
}
if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap,
&fi->i, filename_ptr, functionname_ptr,
line_ptr))
{
msec->flags = origflags;
return true;
}
msec->flags = origflags;
}
/* Fall back on the generic ELF find_nearest_line routine. */
return _bfd_elf_find_nearest_line (abfd, section, symbols, offset,
filename_ptr, functionname_ptr,
line_ptr);
}
/* Structure used to pass information to alpha_elf_output_extsym. */
struct extsym_info
{
bfd *abfd;
struct bfd_link_info *info;
struct ecoff_debug_info *debug;
const struct ecoff_debug_swap *swap;
boolean failed;
};
static boolean
elf64_alpha_output_extsym (h, data)
struct alpha_elf_link_hash_entry *h;
PTR data;
{
struct extsym_info *einfo = (struct extsym_info *) data;
boolean strip;
asection *sec, *output_section;
if (h->root.indx == -2)
strip = false;
else if (((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
|| (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)
&& (h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
&& (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0)
strip = true;
else if (einfo->info->strip == strip_all
|| (einfo->info->strip == strip_some
&& bfd_hash_lookup (einfo->info->keep_hash,
h->root.root.root.string,
false, false) == NULL))
strip = true;
else
strip = false;
if (strip)
return true;
if (h->esym.ifd == -2)
{
h->esym.jmptbl = 0;
h->esym.cobol_main = 0;
h->esym.weakext = 0;
h->esym.reserved = 0;
h->esym.ifd = ifdNil;
h->esym.asym.value = 0;
h->esym.asym.st = stGlobal;
if (h->root.root.type != bfd_link_hash_defined
&& h->root.root.type != bfd_link_hash_defweak)
h->esym.asym.sc = scAbs;
else
{
const char *name;
sec = h->root.root.u.def.section;
output_section = sec->output_section;
/* When making a shared library and symbol h is the one from
the another shared library, OUTPUT_SECTION may be null. */
if (output_section == NULL)
h->esym.asym.sc = scUndefined;
else
{
name = bfd_section_name (output_section->owner, output_section);
if (strcmp (name, ".text") == 0)
h->esym.asym.sc = scText;
else if (strcmp (name, ".data") == 0)
h->esym.asym.sc = scData;
else if (strcmp (name, ".sdata") == 0)
h->esym.asym.sc = scSData;
else if (strcmp (name, ".rodata") == 0
|| strcmp (name, ".rdata") == 0)
h->esym.asym.sc = scRData;
else if (strcmp (name, ".bss") == 0)
h->esym.asym.sc = scBss;
else if (strcmp (name, ".sbss") == 0)
h->esym.asym.sc = scSBss;
else if (strcmp (name, ".init") == 0)
h->esym.asym.sc = scInit;
else if (strcmp (name, ".fini") == 0)
h->esym.asym.sc = scFini;
else
h->esym.asym.sc = scAbs;
}
}
h->esym.asym.reserved = 0;
h->esym.asym.index = indexNil;
}
if (h->root.root.type == bfd_link_hash_common)
h->esym.asym.value = h->root.root.u.c.size;
else if (h->root.root.type == bfd_link_hash_defined
|| h->root.root.type == bfd_link_hash_defweak)
{
if (h->esym.asym.sc == scCommon)
h->esym.asym.sc = scBss;
else if (h->esym.asym.sc == scSCommon)
h->esym.asym.sc = scSBss;
sec = h->root.root.u.def.section;
output_section = sec->output_section;
if (output_section != NULL)
h->esym.asym.value = (h->root.root.u.def.value
+ sec->output_offset
+ output_section->vma);
else
h->esym.asym.value = 0;
}
else if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
{
/* Set type and value for a symbol with a function stub. */
h->esym.asym.st = stProc;
sec = bfd_get_section_by_name (einfo->abfd, ".plt");
if (sec == NULL)
h->esym.asym.value = 0;
else
{
output_section = sec->output_section;
if (output_section != NULL)
h->esym.asym.value = (h->root.plt_offset
+ sec->output_offset
+ output_section->vma);
else
h->esym.asym.value = 0;
}
#if 0 /* FIXME? */
h->esym.ifd = 0;
#endif
}
if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap,
h->root.root.root.string,
&h->esym))
{
einfo->failed = true;
return false;
}
return true;
}
/* FIXME: Create a runtime procedure table from the .mdebug section.
static boolean
mips_elf_create_procedure_table (handle, abfd, info, s, debug)
PTR handle;
bfd *abfd;
struct bfd_link_info *info;
asection *s;
struct ecoff_debug_info *debug;
*/
/* Handle dynamic relocations when doing an Alpha ELF link. */
static boolean
elf64_alpha_check_relocs (abfd, info, sec, relocs)
bfd *abfd;
struct bfd_link_info *info;
asection *sec;
const Elf_Internal_Rela *relocs;
{
bfd *dynobj;
asection *sreloc;
const char *rel_sec_name;
Elf_Internal_Shdr *symtab_hdr;
struct alpha_elf_link_hash_entry **sym_hashes;
struct alpha_elf_got_entry **local_got_entries;
const Elf_Internal_Rela *rel, *relend;
int got_created;
if (info->relocateable)
return true;
dynobj = elf_hash_table(info)->dynobj;
if (dynobj == NULL)
elf_hash_table(info)->dynobj = dynobj = abfd;
sreloc = NULL;
rel_sec_name = NULL;
symtab_hdr = &elf_tdata(abfd)->symtab_hdr;
sym_hashes = alpha_elf_sym_hashes(abfd);
local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
got_created = 0;
relend = relocs + sec->reloc_count;
for (rel = relocs; rel < relend; ++rel)
{
unsigned long r_symndx, r_type;
struct alpha_elf_link_hash_entry *h;
r_symndx = ELF64_R_SYM (rel->r_info);
if (r_symndx < symtab_hdr->sh_info)
h = NULL;
else
{
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
h->root.elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR;
}
r_type = ELF64_R_TYPE (rel->r_info);
switch (r_type)
{
case R_ALPHA_LITERAL:
{
struct alpha_elf_got_entry *gotent;
int flags = 0;
if (h)
{
/* Search for and possibly create a got entry. */
for (gotent = h->got_entries; gotent ; gotent = gotent->next)
if (gotent->gotobj == abfd &&
gotent->addend == rel->r_addend)
break;
if (!gotent)
{
gotent = ((struct alpha_elf_got_entry *)
bfd_alloc (abfd,
sizeof (struct alpha_elf_got_entry)));
if (!gotent)
return false;
gotent->gotobj = abfd;
gotent->addend = rel->r_addend;
gotent->got_offset = -1;
gotent->flags = 0;
gotent->next = h->got_entries;
h->got_entries = gotent;
alpha_elf_tdata (abfd)->total_got_entries++;
}
}
else
{
/* This is a local .got entry -- record for merge. */
if (!local_got_entries)
{
size_t size;
size = (symtab_hdr->sh_info
* sizeof (struct alpha_elf_got_entry *));
local_got_entries = ((struct alpha_elf_got_entry **)
bfd_alloc (abfd, size));
if (!local_got_entries)
return false;
memset (local_got_entries, 0, size);
alpha_elf_tdata (abfd)->local_got_entries =
local_got_entries;
}
for (gotent = local_got_entries[ELF64_R_SYM(rel->r_info)];
gotent != NULL && gotent->addend != rel->r_addend;
gotent = gotent->next)
continue;
if (!gotent)
{
gotent = ((struct alpha_elf_got_entry *)
bfd_alloc (abfd,
sizeof (struct alpha_elf_got_entry)));
if (!gotent)
return false;
gotent->gotobj = abfd;
gotent->addend = rel->r_addend;
gotent->got_offset = -1;
gotent->flags = 0;
gotent->next = local_got_entries[ELF64_R_SYM(rel->r_info)];
local_got_entries[ELF64_R_SYM(rel->r_info)] = gotent;
alpha_elf_tdata(abfd)->total_got_entries++;
alpha_elf_tdata(abfd)->n_local_got_entries++;
}
}
/* Remember how this literal is used from its LITUSEs.
This will be important when it comes to decide if we can
create a .plt entry for a function symbol. */
if (rel+1 < relend
&& ELF64_R_TYPE (rel[1].r_info) == R_ALPHA_LITUSE)
{
do
{
++rel;
if (rel->r_addend >= 1 && rel->r_addend <= 3)
flags |= 1 << rel->r_addend;
}
while (rel+1 < relend &&
ELF64_R_TYPE (rel[1].r_info) == R_ALPHA_LITUSE);
}
else
{
/* No LITUSEs -- presumably the address is not being
loaded for nothing. */
flags = ALPHA_ELF_LINK_HASH_LU_ADDR;
}
gotent->flags |= flags;
if (h)
{
/* Make a guess as to whether a .plt entry will be needed. */
if ((h->flags |= flags) == ALPHA_ELF_LINK_HASH_LU_FUNC)
h->root.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
else
h->root.elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
}
}
/* FALLTHRU */
case R_ALPHA_GPDISP:
case R_ALPHA_GPREL32:
/* We don't actually use the .got here, but the sections must
be created before the linker maps input sections to output
sections. */
if (!got_created)
{
if (!elf64_alpha_create_got_section (abfd, info))
return false;
/* Make sure the object's gotobj is set to itself so
that we default to every object with its own .got.
We'll merge .gots later once we've collected each
object's info. */
alpha_elf_tdata(abfd)->gotobj = abfd;
got_created = 1;
}
break;
case R_ALPHA_SREL16:
case R_ALPHA_SREL32:
case R_ALPHA_SREL64:
if (h == NULL)
break;
/* FALLTHRU */
case R_ALPHA_REFLONG:
case R_ALPHA_REFQUAD:
if (rel_sec_name == NULL)
{
rel_sec_name = (bfd_elf_string_from_elf_section
(abfd, elf_elfheader(abfd)->e_shstrndx,
elf_section_data(sec)->rel_hdr.sh_name));
if (rel_sec_name == NULL)
return false;
BFD_ASSERT (strncmp (rel_sec_name, ".rela", 5) == 0
&& strcmp (bfd_get_section_name (abfd, sec),
rel_sec_name+5) == 0);
}
/* We need to create the section here now whether we eventually
use it or not so that it gets mapped to an output section by
the linker. If not used, we'll kill it in
size_dynamic_sections. */
if (sreloc == NULL)
{
sreloc = bfd_get_section_by_name (dynobj, rel_sec_name);
if (sreloc == NULL)
{
sreloc = bfd_make_section (dynobj, rel_sec_name);
if (sreloc == NULL
|| !bfd_set_section_flags (dynobj, sreloc,
(SEC_ALLOC|SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
| SEC_LINKER_CREATED
| SEC_READONLY))
|| !bfd_set_section_alignment (dynobj, sreloc, 3))
return false;
}
}
if (h)
{
/* Since we havn't seen all of the input symbols yet, we
don't know whether we'll actually need a dynamic relocation
entry for this reloc. So make a record of it. Once we
find out if this thing needs dynamic relocation we'll
expand the relocation sections by the appropriate amount. */
struct alpha_elf_reloc_entry *rent;
for (rent = h->reloc_entries; rent; rent = rent->next)
if (rent->rtype == r_type && rent->srel == sreloc)
break;
if (!rent)
{
rent = ((struct alpha_elf_reloc_entry *)
bfd_alloc (abfd,
sizeof (struct alpha_elf_reloc_entry)));
if (!rent)
return false;
rent->srel = sreloc;
rent->rtype = r_type;
rent->count = 1;
rent->next = h->reloc_entries;
h->reloc_entries = rent;
}
else
rent->count++;
}
else if (info->shared)
{
/* If this is a shared library, we need a RELATIVE reloc. */
sreloc->_raw_size += sizeof (Elf64_External_Rela);
}
break;
}
}
return true;
}
/* Adjust a symbol defined by a dynamic object and referenced by a
regular object. The current definition is in some section of the
dynamic object, but we're not including those sections. We have to
change the definition to something the rest of the link can
understand. */
static boolean
elf64_alpha_adjust_dynamic_symbol (info, h)
struct bfd_link_info *info;
struct elf_link_hash_entry *h;
{
bfd *dynobj;
asection *s;
struct alpha_elf_link_hash_entry *ah;
dynobj = elf_hash_table(info)->dynobj;
ah = (struct alpha_elf_link_hash_entry *)h;
/* Now that we've seen all of the input symbols, finalize our decision
about whether this symbol should get a .plt entry. */
if (h->root.type != bfd_link_hash_undefweak
&& alpha_elf_dynamic_symbol_p (h, info)
&& (h->type == STT_FUNC
|| (h->type == STT_NOTYPE
&& ah->flags == ALPHA_ELF_LINK_HASH_LU_FUNC))
/* Don't prevent otherwise valid programs from linking by attempting
to create a new .got entry somewhere. A Correct Solution would be
to add a new .got section to a new object file and let it be merged
somewhere later. But for now don't bother. */
&& ah->got_entries)
{
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
s = bfd_get_section_by_name(dynobj, ".plt");
if (!s && !elf64_alpha_create_dynamic_sections (dynobj, info))
return false;
/* The first bit of the .plt is reserved. */
if (s->_raw_size == 0)
s->_raw_size = PLT_HEADER_SIZE;
h->plt_offset = s->_raw_size;
s->_raw_size += PLT_ENTRY_SIZE;
/* If this symbol is not defined in a regular file, and we are not
generating a shared library, then set the symbol to the location
in the .plt. This is required to make function pointers compare
equal between the normal executable and the shared library. */
if (!info->shared)
{
h->root.u.def.section = s;
h->root.u.def.value = h->plt_offset;
}
/* We also need a JMP_SLOT entry in the .rela.plt section. */
s = bfd_get_section_by_name (dynobj, ".rela.plt");
BFD_ASSERT (s != NULL);
s->_raw_size += sizeof (Elf64_External_Rela);
return true;
}
else
h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
/* 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)
{
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;
}
/* This is a reference to a symbol defined by a dynamic object which
is not a function. The Alpha, since it uses .got entries for all
symbols even in regular objects, does not need the hackery of a
.dynbss section and COPY dynamic relocations. */
return true;
}
/* Is it possible to merge two object file's .got tables? */
static boolean
elf64_alpha_can_merge_gots (a, b)
bfd *a, *b;
{
int total = alpha_elf_tdata (a)->total_got_entries;
/* Trivial quick fallout test. */
if (total + alpha_elf_tdata (b)->total_got_entries <= MAX_GOT_ENTRIES)
return true;
/* By their nature, local .got entries cannot be merged. */
if ((total += alpha_elf_tdata (b)->n_local_got_entries) > MAX_GOT_ENTRIES)
return false;
/* Failing the common trivial comparison, we must effectively
perform the merge. Not actually performing the merge means that
we don't have to store undo information in case we fail. */
{
struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes(b);
Elf_Internal_Shdr *symtab_hdr = &elf_tdata(b)->symtab_hdr;
int i, n;
n = symtab_hdr->sh_size / symtab_hdr->sh_entsize - symtab_hdr->sh_info;
for (i = 0; i < n; ++i)
{
struct alpha_elf_got_entry *ae, *be;
for (be = hashes[i]->got_entries; be ; be = be->next)
{
if (be->gotobj != b)
continue;
for (ae = hashes[i]->got_entries; ae ; ae = ae->next)
if (ae->gotobj == a && ae->addend == be->addend)
goto global_found;
if (++total > MAX_GOT_ENTRIES)
return false;
global_found:;
}
}
}
return true;
}
/* Actually merge two .got tables. */
static void
elf64_alpha_merge_gots (a, b)
bfd *a, *b;
{
int total = alpha_elf_tdata(a)->total_got_entries;
/* Remember local expansion. */
{
int e = alpha_elf_tdata(b)->n_local_got_entries;
total += e;
alpha_elf_tdata(a)->n_local_got_entries += e;
}
/* Let the local .got entries know they are part of a new subsegment. */
{
struct alpha_elf_got_entry **local_got_entries;
local_got_entries = alpha_elf_tdata(b)->local_got_entries;
if (local_got_entries)
{
int i, n;
n = elf_tdata(b)->symtab_hdr.sh_info;
for (i = 0; i < n; ++i)
{
struct alpha_elf_got_entry *gotent;
for (gotent = local_got_entries[i]; gotent; gotent = gotent->next)
gotent->gotobj = a;
}
}
}
/* Merge the global .got entries. */
{
struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes(b);
Elf_Internal_Shdr *symtab_hdr = &elf_tdata(b)->symtab_hdr;
int i, n;
n = symtab_hdr->sh_size / symtab_hdr->sh_entsize - symtab_hdr->sh_info;
for (i = 0; i < n; ++i)
{
struct alpha_elf_got_entry *ae, *be, **pbe, **start;
start = &hashes[i]->got_entries;
for (pbe = start, be = *start; be ; pbe = &be->next, be = be->next)
{
if (be->gotobj != b)
continue;
for (ae = *start; ae ; ae = ae->next)
if (ae->gotobj == a && ae->addend == be->addend)
{
*pbe = be->next;
goto global_found;
}
be->gotobj = a;
total += 1;
global_found:;
}
}
}
alpha_elf_tdata(a)->total_got_entries = total;
alpha_elf_tdata(b)->gotobj = a;
}
/* Calculate the offsets for the got entries. */
static boolean
elf64_alpha_calc_got_offsets_for_symbol (h, arg)
struct alpha_elf_link_hash_entry *h;
PTR arg;
{
struct alpha_elf_got_entry *gotent;
for (gotent = h->got_entries; gotent; gotent = gotent->next)
{
bfd_size_type *plge = &alpha_elf_tdata (gotent->gotobj)->got->_raw_size;
gotent->got_offset = *plge;
*plge += 8;
}
return true;
}
static void
elf64_alpha_calc_got_offsets (info)
struct bfd_link_info *info;
{
bfd *i, *got_list = alpha_elf_hash_table(info)->got_list;
/* First, zero out the .got sizes, as we may be recalculating the
.got after optimizing it. */
for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
alpha_elf_tdata(i)->got->_raw_size = 0;
/* Next, fill in the offsets for all the global entries. */
alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
elf64_alpha_calc_got_offsets_for_symbol,
NULL);
/* Finally, fill in the offsets for the local entries. */
for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
{
bfd_size_type got_offset = alpha_elf_tdata(i)->got->_raw_size;
bfd *j;
for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next)
{
struct alpha_elf_got_entry **local_got_entries, *gotent;
int k, n;
local_got_entries = alpha_elf_tdata(j)->local_got_entries;
if (!local_got_entries)
continue;
for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k)
for (gotent = local_got_entries[k]; gotent; gotent = gotent->next)
{
gotent->got_offset = got_offset;
got_offset += 8;
}
}
alpha_elf_tdata(i)->got->_raw_size = got_offset;
}
}
/* Remove a section from the output BFD. */
static void
elf64_alpha_strip_section_from_output (s)
asection *s;
{
asection **spp;
for (spp = &s->output_section->owner->sections;
*spp != s->output_section;
spp = &(*spp)->next)
continue;
*spp = s->output_section->next;
--s->output_section->owner->section_count;
}
/* Constructs the gots. */
static boolean
elf64_alpha_always_size_sections (output_bfd, info)
bfd *output_bfd;
struct bfd_link_info *info;
{
bfd *i, *got_list, *cur_got_obj, **cur_got_tail;
int ngots;
if (info->relocateable)
return true;
ngots = 0;
got_list = NULL;
cur_got_obj = NULL;
cur_got_tail = NULL;
for (i = info->input_bfds; i ; i = i->link_next)
{
bfd *this_got = alpha_elf_tdata (i)->gotobj;
/* Don't play if there is no .got for this input file. */
if (this_got == NULL)
continue;
if (alpha_elf_tdata (this_got)->total_got_entries > MAX_GOT_ENTRIES)
{
/* Yikes! A single object file has too many entries. */
(*_bfd_error_handler)
("%s: .got subsegment exceeds 64K (size %d)",
bfd_get_filename(i),
alpha_elf_tdata(this_got)->total_got_entries * 8);
return false;
}
if (cur_got_obj)
{
if (elf64_alpha_can_merge_gots (cur_got_obj, i))
{
elf64_alpha_merge_gots (cur_got_obj, i);
*cur_got_tail = i;
}
else
{
if (++ngots == 2)
{
(*info->callbacks->warning)
(info, "using multiple gp values", (char *) NULL,
output_bfd, (asection *) NULL, (bfd_vma) 0);
}
*cur_got_tail = NULL;
alpha_elf_tdata(cur_got_obj)->got_link_next = got_list;
got_list = cur_got_obj;
cur_got_obj = i;
}
}
else
{
++ngots;
cur_got_obj = i;
}
cur_got_tail = &alpha_elf_tdata(i)->in_got_link_next;
}
if (cur_got_obj)
alpha_elf_tdata (cur_got_obj)->got_link_next = got_list;
alpha_elf_hash_table (info)->got_list = got_list = cur_got_obj;
/* Once the gots have been merged, fill in the got offsets for everything
therein. */
elf64_alpha_calc_got_offsets (info);
/* Allocate space for all of the .got subsections. */
for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
{
asection *s = alpha_elf_tdata(i)->got;
if (s->_raw_size > 0)
{
s->contents = (bfd_byte *) bfd_zalloc (i, s->_raw_size);
if (s->contents == NULL)
return false;
}
}
return true;
}
/* Work out the sizes of the dynamic relocation entries. */
static boolean
elf64_alpha_calc_dynrel_sizes (h, info)
struct alpha_elf_link_hash_entry *h;
struct bfd_link_info *info;
{
/* If the symbol was defined as a common symbol in a regular object
file, and there was no definition in any dynamic object, then the
linker will have allocated space for the symbol in a common
section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been
set. This is done for dynamic symbols in
elf_adjust_dynamic_symbol but this is not done for non-dynamic
symbols, somehow. */
if (((h->root.elf_link_hash_flags
& (ELF_LINK_HASH_DEF_REGULAR
| ELF_LINK_HASH_REF_REGULAR
| ELF_LINK_HASH_DEF_DYNAMIC))
== ELF_LINK_HASH_REF_REGULAR)
&& (h->root.root.type == bfd_link_hash_defined
|| h->root.root.type == bfd_link_hash_defweak)
&& !(h->root.root.u.def.section->owner->flags & DYNAMIC))
{
h->root.elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
}
/* If the symbol is dynamic, we'll need all the relocations in their
natural form. */
if (alpha_elf_dynamic_symbol_p (&h->root, info))
{
struct alpha_elf_reloc_entry *relent;
for (relent = h->reloc_entries; relent; relent = relent->next)
{
relent->srel->_raw_size +=
sizeof (Elf64_External_Rela) * relent->count;
}
/* Only add a .rela.got entry if we're not using a .plt entry. */
if (h->root.plt_offset == MINUS_ONE)
{
bfd *dynobj = elf_hash_table(info)->dynobj;
struct alpha_elf_got_entry *gotent;
bfd_size_type count = 0;
asection *srel;
for (gotent = h->got_entries; gotent ; gotent = gotent->next)
count++;
if (count > 0)
{
srel = bfd_get_section_by_name (dynobj, ".rela.got");
BFD_ASSERT (srel != NULL);
srel->_raw_size += sizeof (Elf64_External_Rela) * count;
}
}
}
/* Otherwise, shared objects require RELATIVE relocs for all REFQUAD
and REFLONG relocations. */
else if (info->shared)
{
struct alpha_elf_reloc_entry *relent;
for (relent = h->reloc_entries; relent; relent = relent->next)
if (relent->rtype == R_ALPHA_REFLONG
|| relent->rtype == R_ALPHA_REFQUAD)
{
relent->srel->_raw_size +=
sizeof(Elf64_External_Rela) * relent->count;
}
}
return true;
}
/* Set the sizes of the dynamic sections. */
static boolean
elf64_alpha_size_dynamic_sections (output_bfd, info)
bfd *output_bfd;
struct bfd_link_info *info;
{
bfd *dynobj;
asection *s;
boolean reltext;
boolean relplt;
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;
}
/* Now that we've seen all of the input files, we can decide which
symbols need dynamic relocation entries and which don't. We've
collected information in check_relocs that we can now apply to
size the dynamic relocation sections. */
alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
elf64_alpha_calc_dynrel_sizes,
info);
/* When building shared libraries, each local .got entry needs a
RELATIVE reloc. */
if (info->shared)
{
bfd *i;
asection *srel;
bfd_size_type count;
srel = bfd_get_section_by_name (dynobj, ".rela.got");
BFD_ASSERT (srel != NULL);
for (i = alpha_elf_hash_table(info)->got_list, count = 0;
i != NULL;
i = alpha_elf_tdata(i)->got_link_next)
count += alpha_elf_tdata(i)->n_local_got_entries;
srel->_raw_size += count * sizeof(Elf64_External_Rela);
}
}
/* else we're not dynamic and by definition we don't need such things. */
/* The check_relocs and adjust_dynamic_symbol entry points have
determined the sizes of the various dynamic sections. Allocate
memory for them. */
reltext = false;
relplt = false;
for (s = dynobj->sections; s != NULL; s = s->next)
{
const char *name;
boolean strip;
if (!(s->flags & SEC_LINKER_CREATED))
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 we don't need this section, strip it from the output file.
This is to handle .rela.bss and .rela.plt. We must create it
in create_dynamic_sections, because it 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. */
strip = false;
if (strncmp (name, ".rela", 5) == 0)
{
strip = (s->_raw_size == 0);
if (!strip)
{
asection *target;
/* If this relocation section applies to a read only
section, then we probably need a DT_TEXTREL entry. */
target = bfd_get_section_by_name (output_bfd, name + 5);
if (target != NULL
&& (target->flags & SEC_READONLY) != 0)
reltext = true;
if (strcmp(name, ".rela.plt") == 0)
relplt = 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)
{
/* It's not one of our dynamic sections, so don't allocate space. */
continue;
}
if (strip)
elf64_alpha_strip_section_from_output (s);
else
{
/* Allocate memory for the section contents. */
s->contents = (bfd_byte *) bfd_zalloc(dynobj, s->_raw_size);
if (s->contents == NULL && s->_raw_size != 0)
return false;
}
}
/* If we are generating a shared library, we generate a section
symbol for each output section. These are local symbols, which
means that they must come first in the dynamic symbol table.
That means we must increment the dynamic symbol index of every
other dynamic symbol. */
if (info->shared)
{
long c[2], i;
asection *p;
c[0] = 0;
c[1] = bfd_count_sections (output_bfd);
elf_hash_table (info)->dynsymcount += c[1];
elf_link_hash_traverse (elf_hash_table(info),
elf64_alpha_adjust_dynindx,
(PTR) c);
for (i = 1, p = output_bfd->sections;
p != NULL;
p = p->next, i++)
{
elf_section_data (p)->dynindx = i;
/* These symbols will have no names, so we don't need to
fiddle with dynstr_index. */
}
}
if (elf_hash_table (info)->dynamic_sections_created)
{
/* Add some entries to the .dynamic section. We fill in the
values later, in elf64_alpha_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_elf64_add_dynamic_entry (info, DT_DEBUG, 0))
return false;
}
if (! bfd_elf64_add_dynamic_entry (info, DT_PLTGOT, 0))
return false;
if (relplt)
{
if (! bfd_elf64_add_dynamic_entry (info, DT_PLTRELSZ, 0)
|| ! bfd_elf64_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
|| ! bfd_elf64_add_dynamic_entry (info, DT_JMPREL, 0))
return false;
}
if (! bfd_elf64_add_dynamic_entry (info, DT_RELA, 0)
|| ! bfd_elf64_add_dynamic_entry (info, DT_RELASZ, 0)
|| ! bfd_elf64_add_dynamic_entry (info, DT_RELAENT,
sizeof(Elf64_External_Rela)))
return false;
if (reltext)
{
if (! bfd_elf64_add_dynamic_entry (info, DT_TEXTREL, 0))
return false;
}
}
return true;
}
/* Increment the index of a dynamic symbol by a given amount. Called
via elf_link_hash_traverse. */
static boolean
elf64_alpha_adjust_dynindx (h, cparg)
struct elf_link_hash_entry *h;
PTR cparg;
{
long *cp = (long *)cparg;
if (h->dynindx >= cp[0])
h->dynindx += cp[1];
return true;
}
/* Relocate an Alpha ELF section. */
static boolean
elf64_alpha_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;
{
Elf_Internal_Shdr *symtab_hdr;
Elf_Internal_Rela *rel;
Elf_Internal_Rela *relend;
asection *sec, *sgot, *srel, *srelgot;
bfd *dynobj, *gotobj;
bfd_vma gp;
srelgot = srel = NULL;
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
dynobj = elf_hash_table (info)->dynobj;
if (dynobj)
{
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
}
/* Find the gp value for this input bfd. */
sgot = NULL;
gp = 0;
gotobj = alpha_elf_tdata (input_bfd)->gotobj;
if (gotobj)
{
sgot = alpha_elf_tdata (gotobj)->got;
gp = _bfd_get_gp_value (gotobj);
if (gp == 0)
{
gp = (sgot->output_section->vma
+ sgot->output_offset
+ 0x8000);
_bfd_set_gp_value (gotobj, gp);
}
}
rel = relocs;
relend = relocs + input_section->reloc_count;
for (; rel < relend; rel++)
{
int r_type;
reloc_howto_type *howto;
unsigned long r_symndx;
struct alpha_elf_link_hash_entry *h;
Elf_Internal_Sym *sym;
bfd_vma relocation;
bfd_vma addend;
bfd_reloc_status_type r;
r_type = ELF64_R_TYPE(rel->r_info);
if (r_type < 0 || r_type >= (int) R_ALPHA_max)
{
bfd_set_error (bfd_error_bad_value);
return false;
}
howto = elf64_alpha_howto_table + r_type;
r_symndx = ELF64_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)
{
sec = local_sections[r_symndx];
rel->r_addend += sec->output_offset + sym->st_value;
}
}
continue;
}
/* This is a final link. */
h = NULL;
sym = NULL;
sec = NULL;
if (r_symndx < symtab_hdr->sh_info)
{
sym = local_syms + r_symndx;
sec = local_sections[r_symndx];
relocation = (sec->output_section->vma
+ sec->output_offset
+ sym->st_value);
}
else
{
h = alpha_elf_sym_hashes (input_bfd)[r_symndx - symtab_hdr->sh_info];
while (h->root.root.type == bfd_link_hash_indirect
|| h->root.root.type == bfd_link_hash_warning)
h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
if (h->root.root.type == bfd_link_hash_defined
|| h->root.root.type == bfd_link_hash_defweak)
{
sec = h->root.root.u.def.section;
#if rth_notdef
if ((r_type == R_ALPHA_LITERAL
&& elf_hash_table(info)->dynamic_sections_created
&& (!info->shared
|| !info->symbolic
|| !(h->root.elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR)))
|| (info->shared
&& (!info->symbolic
|| !(h->root.elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR))
&& (input_section->flags & SEC_ALLOC)
&& (r_type == R_ALPHA_REFLONG
|| r_type == R_ALPHA_REFQUAD
|| r_type == R_ALPHA_LITERAL)))
{
/* In these cases, we don't need the relocation value.
We check specially because in some obscure cases
sec->output_section will be NULL. */
relocation = 0;
}
#else
/* FIXME: Are not these obscure cases simply bugs? Let's
get something working and come back to this. */
if (sec->output_section == NULL)
relocation = 0;
#endif /* rth_notdef */
else
{
relocation = (h->root.root.u.def.value
+ sec->output_section->vma
+ sec->output_offset);
}
}
else if (h->root.root.type == bfd_link_hash_undefweak)
relocation = 0;
else if (info->shared && !info->symbolic)
relocation = 0;
else
{
if (!((*info->callbacks->undefined_symbol)
(info, h->root.root.root.string, input_bfd,
input_section, rel->r_offset)))
return false;
relocation = 0;
}
}
addend = rel->r_addend;
switch (r_type)
{
case R_ALPHA_GPDISP:
{
bfd_byte *p_ldah, *p_lda;
BFD_ASSERT(gp != 0);
relocation = (input_section->output_section->vma
+ input_section->output_offset
+ rel->r_offset);
p_ldah = contents + rel->r_offset - input_section->vma;
p_lda = p_ldah + rel->r_addend;
r = elf64_alpha_do_reloc_gpdisp (input_bfd, gp - relocation,
p_ldah, p_lda);
}
break;
case R_ALPHA_OP_PUSH:
case R_ALPHA_OP_STORE:
case R_ALPHA_OP_PSUB:
case R_ALPHA_OP_PRSHIFT:
/* We hate these silly beasts. */
abort();
case R_ALPHA_LITERAL:
{
struct alpha_elf_got_entry *gotent;
BFD_ASSERT(sgot != NULL);
BFD_ASSERT(gp != 0);
if (h != NULL)
{
gotent = h->got_entries;
while (gotent->gotobj != gotobj || gotent->addend != addend)
gotent = gotent->next;
/* Initialize the .got entry's value. */
if (!(gotent->flags & ALPHA_ELF_GOT_ENTRY_RELOCS_DONE))
{
bfd_put_64 (output_bfd, relocation+addend,
sgot->contents + gotent->got_offset);
/* The dynamic relocations for the .got entries are
done in finish_dynamic_symbol. */
gotent->flags |= ALPHA_ELF_GOT_ENTRY_RELOCS_DONE;
}
}
else
{
gotent = (alpha_elf_tdata(input_bfd)->
local_got_entries[r_symndx]);
while (gotent->addend != addend)
gotent = gotent->next;
if (!(gotent->flags & ALPHA_ELF_GOT_ENTRY_RELOCS_DONE))
{
bfd_put_64 (output_bfd, relocation+addend,
sgot->contents + gotent->got_offset);
/* Local got entries need RELATIVE relocs in shared
libraries. */
if (info->shared)
{
Elf_Internal_Rela outrel;
BFD_ASSERT(srelgot != NULL);
outrel.r_offset = (sgot->output_section->vma
+ sgot->output_offset
+ gotent->got_offset);
outrel.r_info = ELF64_R_INFO(0, R_ALPHA_RELATIVE);
outrel.r_addend = 0;
bfd_elf64_swap_reloca_out (output_bfd, &outrel,
((Elf64_External_Rela *)
srelgot->contents)
+ srelgot->reloc_count++);
}
gotent->flags |= ALPHA_ELF_GOT_ENTRY_RELOCS_DONE;
}
}
/* Figure the gprel relocation. */
addend = 0;
relocation = (sgot->output_section->vma
+ sgot->output_offset
+ gotent->got_offset);
relocation -= gp;
}
/* overflow handled by _bfd_final_link_relocate */
goto default_reloc;
case R_ALPHA_GPREL32:
BFD_ASSERT(gp != 0);
relocation -= gp;
goto default_reloc;
case R_ALPHA_BRADDR:
case R_ALPHA_HINT:
/* The regular PC-relative stuff measures from the start of
the instruction rather than the end. */
addend -= 4;
goto default_reloc;
case R_ALPHA_REFLONG:
case R_ALPHA_REFQUAD:
{
Elf_Internal_Rela outrel;
/* Careful here to remember RELATIVE relocations for global
variables for symbolic shared objects. */
if (h && alpha_elf_dynamic_symbol_p (&h->root, info))
{
BFD_ASSERT(h->root.dynindx != -1);
outrel.r_info = ELF64_R_INFO(h->root.dynindx, r_type);
outrel.r_addend = addend;
addend = 0, relocation = 0;
}
else if (info->shared)
{
outrel.r_info = ELF64_R_INFO(0, R_ALPHA_RELATIVE);
outrel.r_addend = 0;
}
else
goto default_reloc;
if (!srel)
{
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));
BFD_ASSERT(name != NULL);
srel = bfd_get_section_by_name (dynobj, name);
BFD_ASSERT(srel != NULL);
}
outrel.r_offset = (input_section->output_section->vma
+ input_section->output_offset
+ rel->r_offset);
bfd_elf64_swap_reloca_out (output_bfd, &outrel,
((Elf64_External_Rela *)
srel->contents)
+ srel->reloc_count++);
}
goto default_reloc;
default:
default_reloc:
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
contents, rel->r_offset, relocation,
addend);
break;
}
switch (r)
{
case bfd_reloc_ok:
break;
case bfd_reloc_overflow:
{
const char *name;
if (h != NULL)
name = h->root.root.root.string;
else
{
name = (bfd_elf_string_from_elf_section
(input_bfd, symtab_hdr->sh_link, sym->st_name));
if (name == NULL)
return false;
if (*name == '\0')
name = bfd_section_name (input_bfd, sec);
}
if (! ((*info->callbacks->reloc_overflow)
(info, name, howto->name, (bfd_vma) 0,
input_bfd, input_section, rel->r_offset)))
return false;
}
break;
default:
case bfd_reloc_outofrange:
abort ();
}
}
return true;
}
/* Finish up dynamic symbol handling. We set the contents of various
dynamic sections here. */
static boolean
elf64_alpha_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;
{
bfd *dynobj = elf_hash_table(info)->dynobj;
if (h->plt_offset != MINUS_ONE)
{
/* Fill in the .plt entry for this symbol. */
asection *splt, *sgot, *srel;
Elf_Internal_Rela outrel;
bfd_vma got_addr, plt_addr;
bfd_vma plt_index;
struct alpha_elf_got_entry *gotent;
BFD_ASSERT (h->dynindx != -1);
/* The first .got entry will be updated by the .plt with the
address of the target function. */
gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries;
BFD_ASSERT (gotent && gotent->addend == 0);
splt = bfd_get_section_by_name (dynobj, ".plt");
BFD_ASSERT (splt != NULL);
srel = bfd_get_section_by_name (dynobj, ".rela.plt");
BFD_ASSERT (srel != NULL);
sgot = alpha_elf_tdata (gotent->gotobj)->got;
BFD_ASSERT (sgot != NULL);
got_addr = (sgot->output_section->vma
+ sgot->output_offset
+ gotent->got_offset);
plt_addr = (splt->output_section->vma
+ splt->output_offset
+ h->plt_offset);
plt_index = (h->plt_offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE;
/* Fill in the entry in the procedure linkage table. */
{
unsigned insn1, insn2, insn3;
long hi, lo;
/* decompose the reloc offset for the plt for ldah+lda */
hi = plt_index * sizeof(Elf64_External_Rela);
lo = ((hi & 0xffff) ^ 0x8000) - 0x8000;
hi = (hi - lo) >> 16;
insn1 = PLT_ENTRY_WORD1 | (hi & 0xffff);
insn2 = PLT_ENTRY_WORD2 | (lo & 0xffff);
insn3 = PLT_ENTRY_WORD3 | ((-(h->plt_offset + 12) >> 2) & 0x1fffff);
bfd_put_32 (output_bfd, insn1, splt->contents + h->plt_offset);
bfd_put_32 (output_bfd, insn2, splt->contents + h->plt_offset + 4);
bfd_put_32 (output_bfd, insn3, splt->contents + h->plt_offset + 8);
}
/* Fill in the entry in the .rela.plt section. */
outrel.r_offset = got_addr;
outrel.r_info = ELF64_R_INFO(h->dynindx, R_ALPHA_JMP_SLOT);
outrel.r_addend = 0;
bfd_elf64_swap_reloca_out (output_bfd, &outrel,
((Elf64_External_Rela *)srel->contents
+ plt_index));
if (!(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
{
/* Mark the symbol as undefined, rather than as defined in the
.plt section. Leave the value alone. */
sym->st_shndx = SHN_UNDEF;
}
/* Fill in the entries in the .got. */
bfd_put_64 (output_bfd, plt_addr, sgot->contents + gotent->got_offset);
/* Subsequent .got entries will continue to bounce through the .plt. */
while ((gotent = gotent->next) != NULL)
{
sgot = alpha_elf_tdata(gotent->gotobj)->got;
BFD_ASSERT(sgot != NULL);
BFD_ASSERT(gotent->addend == 0);
bfd_put_64 (output_bfd, plt_addr,
sgot->contents + gotent->got_offset);
}
}
else if (alpha_elf_dynamic_symbol_p (h, info))
{
/* Fill in the dynamic relocations for this symbol's .got entries. */
asection *srel;
Elf_Internal_Rela outrel;
struct alpha_elf_got_entry *gotent;
srel = bfd_get_section_by_name (dynobj, ".rela.got");
BFD_ASSERT (srel != NULL);
outrel.r_info = ELF64_R_INFO (h->dynindx, R_ALPHA_GLOB_DAT);
for (gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries;
gotent != NULL;
gotent = gotent->next)
{
asection *sgot = alpha_elf_tdata (gotent->gotobj)->got;
outrel.r_offset = (sgot->output_section->vma
+ sgot->output_offset
+ gotent->got_offset);
outrel.r_addend = gotent->addend;
bfd_elf64_swap_reloca_out (output_bfd, &outrel,
((Elf64_External_Rela *)srel->contents
+ srel->reloc_count++));
}
}
/* Mark some specially defined symbols as absolute. */
if (strcmp (h->root.root.string, "_DYNAMIC") == 0
|| strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
|| strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
sym->st_shndx = SHN_ABS;
return true;
}
/* Finish up the dynamic sections. */
static boolean
elf64_alpha_finish_dynamic_sections (output_bfd, info)
bfd *output_bfd;
struct bfd_link_info *info;
{
bfd *dynobj;
asection *sdyn;
dynobj = elf_hash_table (info)->dynobj;
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
if (elf_hash_table (info)->dynamic_sections_created)
{
asection *splt;
Elf64_External_Dyn *dyncon, *dynconend;
splt = bfd_get_section_by_name (dynobj, ".plt");
BFD_ASSERT (splt != NULL && sdyn != NULL);
dyncon = (Elf64_External_Dyn *) sdyn->contents;
dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
for (; dyncon < dynconend; dyncon++)
{
Elf_Internal_Dyn dyn;
const char *name;
asection *s;
bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
switch (dyn.d_tag)
{
case DT_PLTGOT:
name = ".plt";
goto get_vma;
case DT_PLTRELSZ:
name = ".rela.plt";
goto get_size;
case DT_JMPREL:
name = ".rela.plt";
goto get_vma;
case DT_RELASZ:
/* My interpretation of the TIS v1.1 ELF document indicates
that RELASZ should not include JMPREL. This is not what
the rest of the BFD does. It is, however, what the
glibc ld.so wants. Do this fixup here until we found
out who is right. */
s = bfd_get_section_by_name (output_bfd, ".rela.plt");
if (s)
{
dyn.d_un.d_val -=
(s->_cooked_size ? s->_cooked_size : s->_raw_size);
}
break;
get_vma:
s = bfd_get_section_by_name (output_bfd, name);
dyn.d_un.d_ptr = (s ? s->vma : 0);
break;
get_size:
s = bfd_get_section_by_name (output_bfd, name);
dyn.d_un.d_val =
(s->_cooked_size ? s->_cooked_size : s->_raw_size);
break;
}
bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
}
/* Initialize the PLT0 entry */
if (splt->_raw_size > 0)
{
bfd_put_32 (output_bfd, PLT_HEADER_WORD1, splt->contents);
bfd_put_32 (output_bfd, PLT_HEADER_WORD2, splt->contents + 4);
bfd_put_32 (output_bfd, PLT_HEADER_WORD3, splt->contents + 8);
bfd_put_32 (output_bfd, PLT_HEADER_WORD4, splt->contents + 12);
/* The next two words will be filled in by ld.so */
bfd_put_64 (output_bfd, 0, splt->contents + 16);
bfd_put_64 (output_bfd, 0, splt->contents + 24);
elf_section_data (splt->output_section)->this_hdr.sh_entsize =
PLT_HEADER_SIZE;
}
}
if (info->shared)
{
asection *sdynsym;
asection *s;
Elf_Internal_Sym sym;
/* Set up the section symbols for the output sections. */
sdynsym = bfd_get_section_by_name (dynobj, ".dynsym");
BFD_ASSERT (sdynsym != NULL);
sym.st_size = 0;
sym.st_name = 0;
sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
sym.st_other = 0;
for (s = output_bfd->sections; s != NULL; s = s->next)
{
int indx;
sym.st_value = s->vma;
indx = elf_section_data (s)->this_idx;
BFD_ASSERT (indx > 0);
sym.st_shndx = indx;
bfd_elf64_swap_symbol_out (output_bfd, &sym,
(PTR) (((Elf64_External_Sym *)
sdynsym->contents)
+ elf_section_data (s)->dynindx));
}
/* Set the sh_info field of the output .dynsym section to the
index of the first global symbol. */
elf_section_data (sdynsym->output_section)->this_hdr.sh_info =
bfd_count_sections (output_bfd) + 1;
}
return true;
}
/* We need to use a special link routine to handle the .reginfo and
the .mdebug sections. We need to merge all instances of these
sections together, not write them all out sequentially. */
static boolean
elf64_alpha_final_link (abfd, info)
bfd *abfd;
struct bfd_link_info *info;
{
asection *o;
struct bfd_link_order *p;
asection *reginfo_sec, *mdebug_sec, *gptab_data_sec, *gptab_bss_sec;
struct ecoff_debug_info debug;
const struct ecoff_debug_swap *swap
= get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
HDRR *symhdr = &debug.symbolic_header;
PTR mdebug_handle = NULL;
/* Go through the sections and collect the .reginfo and .mdebug
information. */
reginfo_sec = NULL;
mdebug_sec = NULL;
gptab_data_sec = NULL;
gptab_bss_sec = NULL;
for (o = abfd->sections; o != (asection *) NULL; o = o->next)
{
#ifdef ERIC_neverdef
if (strcmp (o->name, ".reginfo") == 0)
{
memset (&reginfo, 0, sizeof reginfo);
/* We have found the .reginfo section in the output file.
Look through all the link_orders comprising it and merge
the information together. */
for (p = o->link_order_head;
p != (struct bfd_link_order *) NULL;
p = p->next)
{
asection *input_section;
bfd *input_bfd;
Elf64_External_RegInfo ext;
Elf64_RegInfo sub;
if (p->type != bfd_indirect_link_order)
{
if (p->type == bfd_fill_link_order)
continue;
abort ();
}
input_section = p->u.indirect.section;
input_bfd = input_section->owner;
/* The linker emulation code has probably clobbered the
size to be zero bytes. */
if (input_section->_raw_size == 0)
input_section->_raw_size = sizeof (Elf64_External_RegInfo);
if (! bfd_get_section_contents (input_bfd, input_section,
(PTR) &ext,
(file_ptr) 0,
sizeof ext))
return false;
bfd_alpha_elf64_swap_reginfo_in (input_bfd, &ext, &sub);
reginfo.ri_gprmask |= sub.ri_gprmask;
reginfo.ri_cprmask[0] |= sub.ri_cprmask[0];
reginfo.ri_cprmask[1] |= sub.ri_cprmask[1];
reginfo.ri_cprmask[2] |= sub.ri_cprmask[2];
reginfo.ri_cprmask[3] |= sub.ri_cprmask[3];
/* ri_gp_value is set by the function
alpha_elf_section_processing when the section is
finally written out. */
/* Hack: reset the SEC_HAS_CONTENTS flag so that
elf_link_input_bfd ignores this section. */
input_section->flags &=~ SEC_HAS_CONTENTS;
}
/* Force the section size to the value we want. */
o->_raw_size = sizeof (Elf64_External_RegInfo);
/* Skip this section later on (I don't think this currently
matters, but someday it might). */
o->link_order_head = (struct bfd_link_order *) NULL;
reginfo_sec = o;
}
#endif
if (strcmp (o->name, ".mdebug") == 0)
{
struct extsym_info einfo;
/* We have found the .mdebug section in the output file.
Look through all the link_orders comprising it and merge
the information together. */
symhdr->magic = swap->sym_magic;
/* FIXME: What should the version stamp be? */
symhdr->vstamp = 0;
symhdr->ilineMax = 0;
symhdr->cbLine = 0;
symhdr->idnMax = 0;
symhdr->ipdMax = 0;
symhdr->isymMax = 0;
symhdr->ioptMax = 0;
symhdr->iauxMax = 0;
symhdr->issMax = 0;
symhdr->issExtMax = 0;
symhdr->ifdMax = 0;
symhdr->crfd = 0;
symhdr->iextMax = 0;
/* We accumulate the debugging information itself in the
debug_info structure. */
debug.line = NULL;
debug.external_dnr = NULL;
debug.external_pdr = NULL;
debug.external_sym = NULL;
debug.external_opt = NULL;
debug.external_aux = NULL;
debug.ss = NULL;
debug.ssext = debug.ssext_end = NULL;
debug.external_fdr = NULL;
debug.external_rfd = NULL;
debug.external_ext = debug.external_ext_end = NULL;
mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info);
if (mdebug_handle == (PTR) NULL)
return false;
if (1)
{
asection *s;
EXTR esym;
bfd_vma last;
unsigned int i;
static const char * const name[] =
{
".text", ".init", ".fini", ".data",
".rodata", ".sdata", ".sbss", ".bss"
};
static const int sc[] = { scText, scInit, scFini, scData,
scRData, scSData, scSBss, scBss };
esym.jmptbl = 0;
esym.cobol_main = 0;
esym.weakext = 0;
esym.reserved = 0;
esym.ifd = ifdNil;
esym.asym.iss = issNil;
esym.asym.st = stLocal;
esym.asym.reserved = 0;
esym.asym.index = indexNil;
for (i = 0; i < 8; i++)
{
esym.asym.sc = sc[i];
s = bfd_get_section_by_name (abfd, name[i]);
if (s != NULL)
{
esym.asym.value = s->vma;
last = s->vma + s->_raw_size;
}
else
esym.asym.value = last;
if (! bfd_ecoff_debug_one_external (abfd, &debug, swap,
name[i], &esym))
return false;
}
}
for (p = o->link_order_head;
p != (struct bfd_link_order *) NULL;
p = p->next)
{
asection *input_section;
bfd *input_bfd;
const struct ecoff_debug_swap *input_swap;
struct ecoff_debug_info input_debug;
char *eraw_src;
char *eraw_end;
if (p->type != bfd_indirect_link_order)
{
if (p->type == bfd_fill_link_order)
continue;
abort ();
}
input_section = p->u.indirect.section;
input_bfd = input_section->owner;
if (bfd_get_flavour (input_bfd) != bfd_target_elf_flavour
|| (get_elf_backend_data (input_bfd)
->elf_backend_ecoff_debug_swap) == NULL)
{
/* I don't know what a non ALPHA ELF bfd would be
doing with a .mdebug section, but I don't really
want to deal with it. */
continue;
}
input_swap = (get_elf_backend_data (input_bfd)
->elf_backend_ecoff_debug_swap);
BFD_ASSERT (p->size == input_section->_raw_size);
/* The ECOFF linking code expects that we have already
read in the debugging information and set up an
ecoff_debug_info structure, so we do that now. */
if (!elf64_alpha_read_ecoff_info (input_bfd, input_section,
&input_debug))
return false;
if (! (bfd_ecoff_debug_accumulate
(mdebug_handle, abfd, &debug, swap, input_bfd,
&input_debug, input_swap, info)))
return false;
/* Loop through the external symbols. For each one with
interesting information, try to find the symbol in
the linker global hash table and save the information
for the output external symbols. */
eraw_src = input_debug.external_ext;
eraw_end = (eraw_src
+ (input_debug.symbolic_header.iextMax
* input_swap->external_ext_size));
for (;
eraw_src < eraw_end;
eraw_src += input_swap->external_ext_size)
{
EXTR ext;
const char *name;
struct alpha_elf_link_hash_entry *h;
(*input_swap->swap_ext_in) (input_bfd, (PTR) eraw_src, &ext);
if (ext.asym.sc == scNil
|| ext.asym.sc == scUndefined
|| ext.asym.sc == scSUndefined)
continue;
name = input_debug.ssext + ext.asym.iss;
h = alpha_elf_link_hash_lookup (alpha_elf_hash_table (info),
name, false, false, true);
if (h == NULL || h->esym.ifd != -2)
continue;
if (ext.ifd != -1)
{
BFD_ASSERT (ext.ifd
< input_debug.symbolic_header.ifdMax);
ext.ifd = input_debug.ifdmap[ext.ifd];
}
h->esym = ext;
}
/* Free up the information we just read. */
free (input_debug.line);
free (input_debug.external_dnr);
free (input_debug.external_pdr);
free (input_debug.external_sym);
free (input_debug.external_opt);
free (input_debug.external_aux);
free (input_debug.ss);
free (input_debug.ssext);
free (input_debug.external_fdr);
free (input_debug.external_rfd);
free (input_debug.external_ext);
/* Hack: reset the SEC_HAS_CONTENTS flag so that
elf_link_input_bfd ignores this section. */
input_section->flags &=~ SEC_HAS_CONTENTS;
}
#ifdef ERIC_neverdef
if (info->shared)
{
/* Create .rtproc section. */
rtproc_sec = bfd_get_section_by_name (abfd, ".rtproc");
if (rtproc_sec == NULL)
{
flagword flags = (SEC_HAS_CONTENTS
| SEC_IN_MEMORY
| SEC_LINKER_CREATED
| SEC_READONLY);
rtproc_sec = bfd_make_section (abfd, ".rtproc");
if (rtproc_sec == NULL
|| ! bfd_set_section_flags (abfd, rtproc_sec, flags)
|| ! bfd_set_section_alignment (abfd, rtproc_sec, 12))
return false;
}
if (! alpha_elf_create_procedure_table (mdebug_handle, abfd,
info, rtproc_sec, &debug))
return false;
}
#endif
/* Build the external symbol information. */
einfo.abfd = abfd;
einfo.info = info;
einfo.debug = &debug;
einfo.swap = swap;
einfo.failed = false;
elf_link_hash_traverse (elf_hash_table (info),
elf64_alpha_output_extsym,
(PTR) &einfo);
if (einfo.failed)
return false;
/* Set the size of the .mdebug section. */
o->_raw_size = bfd_ecoff_debug_size (abfd, &debug, swap);
/* Skip this section later on (I don't think this currently
matters, but someday it might). */
o->link_order_head = (struct bfd_link_order *) NULL;
mdebug_sec = o;
}
#ifdef ERIC_neverdef
if (strncmp (o->name, ".gptab.", sizeof ".gptab." - 1) == 0)
{
const char *subname;
unsigned int c;
Elf64_gptab *tab;
Elf64_External_gptab *ext_tab;
unsigned int i;
/* The .gptab.sdata and .gptab.sbss sections hold
information describing how the small data area would
change depending upon the -G switch. These sections
not used in executables files. */
if (! info->relocateable)
{
asection **secpp;
for (p = o->link_order_head;
p != (struct bfd_link_order *) NULL;
p = p->next)
{
asection *input_section;
if (p->type != bfd_indirect_link_order)
{
if (p->type == bfd_fill_link_order)
continue;
abort ();
}
input_section = p->u.indirect.section;
/* Hack: reset the SEC_HAS_CONTENTS flag so that
elf_link_input_bfd ignores this section. */
input_section->flags &=~ SEC_HAS_CONTENTS;
}
/* Skip this section later on (I don't think this
currently matters, but someday it might). */
o->link_order_head = (struct bfd_link_order *) NULL;
/* Really remove the section. */
for (secpp = &abfd->sections;
*secpp != o;
secpp = &(*secpp)->next)
;
*secpp = (*secpp)->next;
--abfd->section_count;
continue;
}
/* There is one gptab for initialized data, and one for
uninitialized data. */
if (strcmp (o->name, ".gptab.sdata") == 0)
gptab_data_sec = o;
else if (strcmp (o->name, ".gptab.sbss") == 0)
gptab_bss_sec = o;
else
{
(*_bfd_error_handler)
("%s: illegal section name `%s'",
bfd_get_filename (abfd), o->name);
bfd_set_error (bfd_error_nonrepresentable_section);
return false;
}
/* The linker script always combines .gptab.data and
.gptab.sdata into .gptab.sdata, and likewise for
.gptab.bss and .gptab.sbss. It is possible that there is
no .sdata or .sbss section in the output file, in which
case we must change the name of the output section. */
subname = o->name + sizeof ".gptab" - 1;
if (bfd_get_section_by_name (abfd, subname) == NULL)
{
if (o == gptab_data_sec)
o->name = ".gptab.data";
else
o->name = ".gptab.bss";
subname = o->name + sizeof ".gptab" - 1;
BFD_ASSERT (bfd_get_section_by_name (abfd, subname) != NULL);
}
/* Set up the first entry. */
c = 1;
tab = (Elf64_gptab *) bfd_malloc (c * sizeof (Elf64_gptab));
if (tab == NULL)
return false;
tab[0].gt_header.gt_current_g_value = elf_gp_size (abfd);
tab[0].gt_header.gt_unused = 0;
/* Combine the input sections. */
for (p = o->link_order_head;
p != (struct bfd_link_order *) NULL;
p = p->next)
{
asection *input_section;
bfd *input_bfd;
bfd_size_type size;
unsigned long last;
bfd_size_type gpentry;
if (p->type != bfd_indirect_link_order)
{
if (p->type == bfd_fill_link_order)
continue;
abort ();
}
input_section = p->u.indirect.section;
input_bfd = input_section->owner;
/* Combine the gptab entries for this input section one
by one. We know that the input gptab entries are
sorted by ascending -G value. */
size = bfd_section_size (input_bfd, input_section);
last = 0;
for (gpentry = sizeof (Elf64_External_gptab);
gpentry < size;
gpentry += sizeof (Elf64_External_gptab))
{
Elf64_External_gptab ext_gptab;
Elf64_gptab int_gptab;
unsigned long val;
unsigned long add;
boolean exact;
unsigned int look;
if (! (bfd_get_section_contents
(input_bfd, input_section, (PTR) &ext_gptab,
gpentry, sizeof (Elf64_External_gptab))))
{
free (tab);
return false;
}
bfd_alpha_elf64_swap_gptab_in (input_bfd, &ext_gptab,
&int_gptab);
val = int_gptab.gt_entry.gt_g_value;
add = int_gptab.gt_entry.gt_bytes - last;
exact = false;
for (look = 1; look < c; look++)
{
if (tab[look].gt_entry.gt_g_value >= val)
tab[look].gt_entry.gt_bytes += add;
if (tab[look].gt_entry.gt_g_value == val)
exact = true;
}
if (! exact)
{
Elf64_gptab *new_tab;
unsigned int max;
/* We need a new table entry. */
new_tab = ((Elf64_gptab *)
bfd_realloc ((PTR) tab,
(c + 1) * sizeof (Elf64_gptab)));
if (new_tab == NULL)
{
free (tab);
return false;
}
tab = new_tab;
tab[c].gt_entry.gt_g_value = val;
tab[c].gt_entry.gt_bytes = add;
/* Merge in the size for the next smallest -G
value, since that will be implied by this new
value. */
max = 0;
for (look = 1; look < c; look++)
{
if (tab[look].gt_entry.gt_g_value < val
&& (max == 0
|| (tab[look].gt_entry.gt_g_value
> tab[max].gt_entry.gt_g_value)))
max = look;
}
if (max != 0)
tab[c].gt_entry.gt_bytes +=
tab[max].gt_entry.gt_bytes;
++c;
}
last = int_gptab.gt_entry.gt_bytes;
}
/* Hack: reset the SEC_HAS_CONTENTS flag so that
elf_link_input_bfd ignores this section. */
input_section->flags &=~ SEC_HAS_CONTENTS;
}
/* The table must be sorted by -G value. */
if (c > 2)
qsort (tab + 1, c - 1, sizeof (tab[0]), gptab_compare);
/* Swap out the table. */
ext_tab = ((Elf64_External_gptab *)
bfd_alloc (abfd, c * sizeof (Elf64_External_gptab)));
if (ext_tab == NULL)
{
free (tab);
return false;
}
for (i = 0; i < c; i++)
bfd_alpha_elf64_swap_gptab_out (abfd, tab + i, ext_tab + i);
free (tab);
o->_raw_size = c * sizeof (Elf64_External_gptab);
o->contents = (bfd_byte *) ext_tab;
/* Skip this section later on (I don't think this currently
matters, but someday it might). */
o->link_order_head = (struct bfd_link_order *) NULL;
}
#endif
}
/* Invoke the regular ELF backend linker to do all the work. */
if (! bfd_elf64_bfd_final_link (abfd, info))
return false;
/* Now write out the computed sections. */
/* The .got subsections... */
{
bfd *i, *dynobj = elf_hash_table(info)->dynobj;
for (i = alpha_elf_hash_table(info)->got_list;
i != NULL;
i = alpha_elf_tdata(i)->got_link_next)
{
asection *sgot;
/* elf_bfd_final_link already did everything in dynobj. */
if (i == dynobj)
continue;
sgot = alpha_elf_tdata(i)->got;
if (! bfd_set_section_contents (abfd, sgot->output_section,
sgot->contents, sgot->output_offset,
sgot->_raw_size))
return false;
}
}
#ifdef ERIC_neverdef
if (reginfo_sec != (asection *) NULL)
{
Elf64_External_RegInfo ext;
bfd_alpha_elf64_swap_reginfo_out (abfd, &reginfo, &ext);
if (! bfd_set_section_contents (abfd, reginfo_sec, (PTR) &ext,
(file_ptr) 0, sizeof ext))
return false;
}
#endif
if (mdebug_sec != (asection *) NULL)
{
BFD_ASSERT (abfd->output_has_begun);
if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug,
swap, info,
mdebug_sec->filepos))
return false;
bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info);
}
if (gptab_data_sec != (asection *) NULL)
{
if (! bfd_set_section_contents (abfd, gptab_data_sec,
gptab_data_sec->contents,
(file_ptr) 0,
gptab_data_sec->_raw_size))
return false;
}
if (gptab_bss_sec != (asection *) NULL)
{
if (! bfd_set_section_contents (abfd, gptab_bss_sec,
gptab_bss_sec->contents,
(file_ptr) 0,
gptab_bss_sec->_raw_size))
return false;
}
return true;
}
/* ECOFF swapping routines. These are used when dealing with the
.mdebug section, which is in the ECOFF debugging format. Copied
from elf32-mips.c. */
static const struct ecoff_debug_swap
elf64_alpha_ecoff_debug_swap =
{
/* Symbol table magic number. */
magicSym2,
/* Alignment of debugging information. E.g., 4. */
8,
/* Sizes of external symbolic information. */
sizeof (struct hdr_ext),
sizeof (struct dnr_ext),
sizeof (struct pdr_ext),
sizeof (struct sym_ext),
sizeof (struct opt_ext),
sizeof (struct fdr_ext),
sizeof (struct rfd_ext),
sizeof (struct ext_ext),
/* Functions to swap in external symbolic data. */
ecoff_swap_hdr_in,
ecoff_swap_dnr_in,
ecoff_swap_pdr_in,
ecoff_swap_sym_in,
ecoff_swap_opt_in,
ecoff_swap_fdr_in,
ecoff_swap_rfd_in,
ecoff_swap_ext_in,
_bfd_ecoff_swap_tir_in,
_bfd_ecoff_swap_rndx_in,
/* Functions to swap out external symbolic data. */
ecoff_swap_hdr_out,
ecoff_swap_dnr_out,
ecoff_swap_pdr_out,
ecoff_swap_sym_out,
ecoff_swap_opt_out,
ecoff_swap_fdr_out,
ecoff_swap_rfd_out,
ecoff_swap_ext_out,
_bfd_ecoff_swap_tir_out,
_bfd_ecoff_swap_rndx_out,
/* Function to read in symbolic data. */
elf64_alpha_read_ecoff_info
};
#define TARGET_LITTLE_SYM bfd_elf64_alpha_vec
#define TARGET_LITTLE_NAME "elf64-alpha"
#define ELF_ARCH bfd_arch_alpha
#define ELF_MACHINE_CODE EM_ALPHA
#define ELF_MAXPAGESIZE 0x100000
#define bfd_elf64_bfd_link_hash_table_create \
elf64_alpha_bfd_link_hash_table_create
#define bfd_elf64_bfd_reloc_type_lookup \
elf64_alpha_bfd_reloc_type_lookup
#define elf_info_to_howto \
elf64_alpha_info_to_howto
#define bfd_elf64_mkobject \
elf64_alpha_mkobject
#define elf_backend_object_p \
elf64_alpha_object_p
#define elf_backend_section_from_shdr \
elf64_alpha_section_from_shdr
#define elf_backend_fake_sections \
elf64_alpha_fake_sections
#define elf_backend_additional_program_headers \
elf64_alpha_additional_program_headers
#define bfd_elf64_bfd_is_local_label \
elf64_alpha_is_local_label
#define bfd_elf64_find_nearest_line \
elf64_alpha_find_nearest_line
#define elf_backend_check_relocs \
elf64_alpha_check_relocs
#define elf_backend_create_dynamic_sections \
elf64_alpha_create_dynamic_sections
#define elf_backend_adjust_dynamic_symbol \
elf64_alpha_adjust_dynamic_symbol
#define elf_backend_always_size_sections \
elf64_alpha_always_size_sections
#define elf_backend_size_dynamic_sections \
elf64_alpha_size_dynamic_sections
#define elf_backend_relocate_section \
elf64_alpha_relocate_section
#define elf_backend_finish_dynamic_symbol \
elf64_alpha_finish_dynamic_symbol
#define elf_backend_finish_dynamic_sections \
elf64_alpha_finish_dynamic_sections
#define bfd_elf64_bfd_final_link \
elf64_alpha_final_link
#define elf_backend_ecoff_debug_swap \
&elf64_alpha_ecoff_debug_swap
/*
* A few constants that determine how the .plt section is set up.
*/
#define elf_backend_want_got_plt 0
#define elf_backend_plt_readonly 0
#define elf_backend_want_plt_sym 1
#include "elf64-target.h"
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