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gnu / binutils-gdb / 76b43c9b5c2b275cbf4f927bfc25984410cb5dd5 / . / bfd / elf32-m32r.c
blob: 6a732585f5f42bcd9926182e1ab7a8edafde9d77 [file] [log] [blame]
/* M32R-specific support for 32-bit ELF.
Copyright (C) 1996-2021 Free Software Foundation, Inc.
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 3 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., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/m32r.h"
#define NOP_INSN 0x7000
#define MAKE_PARALLEL(insn) ((insn) | 0x8000)
/* Use REL instead of RELA to save space.
This only saves space in libraries and object files, but perhaps
relocs will be put in ROM? All in all though, REL relocs are a pain
to work with. */
/* #define USE_REL 1
#ifndef USE_REL
#define USE_REL 0
#endif */
/* Use RELA. But use REL to link old objects for backwords compatibility. */
/* Functions for the M32R ELF linker. */
/* The name of the dynamic interpreter. This is put in the .interp
section. */
#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
/* The nop opcode we use. */
#define M32R_NOP 0x7000f000
#define PLT_EMPTY 0x10101010 /* RIE -> RIE */
/* The size in bytes of an entry in the procedure linkage table. */
#define PLT_ENTRY_SIZE 20
#define PLT_HEADER_SIZE 20
/* The first one entries in a procedure linkage table are reserved,
and the initial contents are unimportant (we zero them out).
Subsequent entries look like this. */
#define PLT0_ENTRY_WORD0 0xd6c00000 /* seth r6, #high(.got+4) */
#define PLT0_ENTRY_WORD1 0x86e60000 /* or3 r6, r6, #low(.got)+4) */
#define PLT0_ENTRY_WORD2 0x24e626c6 /* ld r4, @r6+ -> ld r6, @r6 */
#define PLT0_ENTRY_WORD3 0x1fc6f000 /* jmp r6 || pnop */
#define PLT0_ENTRY_WORD4 PLT_EMPTY /* RIE -> RIE */
#define PLT0_PIC_ENTRY_WORD0 0xa4cc0004 /* ld r4, @(4,r12) */
#define PLT0_PIC_ENTRY_WORD1 0xa6cc0008 /* ld r6, @(8,r12) */
#define PLT0_PIC_ENTRY_WORD2 0x1fc6f000 /* jmp r6 || nop */
#define PLT0_PIC_ENTRY_WORD3 PLT_EMPTY /* RIE -> RIE */
#define PLT0_PIC_ENTRY_WORD4 PLT_EMPTY /* RIE -> RIE */
#define PLT_ENTRY_WORD0 0xe6000000 /* ld24 r6, .name_in_GOT */
#define PLT_ENTRY_WORD1 0x06acf000 /* add r6, r12 || nop */
#define PLT_ENTRY_WORD0b 0xd6c00000 /* seth r6, #high(.name_in_GOT) */
#define PLT_ENTRY_WORD1b 0x86e60000 /* or3 r6, r6, #low(.name_in_GOT) */
#define PLT_ENTRY_WORD2 0x26c61fc6 /* ld r6, @r6 -> jmp r6 */
#define PLT_ENTRY_WORD3 0xe5000000 /* ld24 r5, $offset */
#define PLT_ENTRY_WORD4 0xff000000 /* bra .plt0. */
/* Utility to actually perform an R_M32R_10_PCREL reloc. */
static bfd_reloc_status_type
m32r_elf_do_10_pcrel_reloc (bfd *abfd,
reloc_howto_type *howto,
asection *input_section,
bfd_byte *data,
bfd_vma offset,
asection *symbol_section ATTRIBUTE_UNUSED,
bfd_vma symbol_value,
bfd_vma addend)
{
bfd_signed_vma relocation;
unsigned long x;
bfd_reloc_status_type status;
/* Sanity check the address (offset in section). */
if (offset > bfd_get_section_limit (abfd, input_section))
return bfd_reloc_outofrange;
relocation = symbol_value + addend;
/* Make it pc relative. */
relocation -= (input_section->output_section->vma
+ input_section->output_offset);
/* These jumps mask off the lower two bits of the current address
before doing pcrel calculations. */
relocation -= (offset & -(bfd_vma) 4);
if (relocation < -0x200 || relocation > 0x1ff)
status = bfd_reloc_overflow;
else
status = bfd_reloc_ok;
x = bfd_get_16 (abfd, data + offset);
relocation >>= howto->rightshift;
relocation <<= howto->bitpos;
x = (x & ~howto->dst_mask) | (((x & howto->src_mask) + relocation) & howto->dst_mask);
bfd_put_16 (abfd, (bfd_vma) x, data + offset);
return status;
}
/* Handle the R_M32R_10_PCREL reloc. */
static bfd_reloc_status_type
m32r_elf_10_pcrel_reloc (bfd * abfd,
arelent * reloc_entry,
asymbol * symbol,
void * data,
asection * input_section,
bfd * output_bfd,
char ** error_message ATTRIBUTE_UNUSED)
{
/* This part is from bfd_elf_generic_reloc. */
if (output_bfd != NULL
&& (symbol->flags & BSF_SECTION_SYM) == 0
&& (! reloc_entry->howto->partial_inplace
|| reloc_entry->addend == 0))
{
reloc_entry->address += input_section->output_offset;
return bfd_reloc_ok;
}
if (output_bfd != NULL)
/* FIXME: See bfd_perform_relocation. Is this right? */
return bfd_reloc_continue;
return m32r_elf_do_10_pcrel_reloc (abfd, reloc_entry->howto,
input_section,
data, reloc_entry->address,
symbol->section,
(symbol->value
+ symbol->section->output_section->vma
+ symbol->section->output_offset),
reloc_entry->addend);
}
/* Do generic partial_inplace relocation.
This is a local replacement for bfd_elf_generic_reloc. */
static bfd_reloc_status_type
m32r_elf_generic_reloc (bfd *input_bfd,
arelent *reloc_entry,
asymbol *symbol,
void * data,
asection *input_section,
bfd *output_bfd,
char **error_message ATTRIBUTE_UNUSED)
{
bfd_reloc_status_type ret;
bfd_vma relocation;
bfd_byte *inplace_address;
/* This part is from bfd_elf_generic_reloc.
If we're relocating, and this an external symbol, we don't want
to change anything. */
if (output_bfd != NULL
&& (symbol->flags & BSF_SECTION_SYM) == 0
&& reloc_entry->addend == 0)
{
reloc_entry->address += input_section->output_offset;
return bfd_reloc_ok;
}
/* Now do the reloc in the usual way.
??? It would be nice to call bfd_elf_generic_reloc here,
but we have partial_inplace set. bfd_elf_generic_reloc will
pass the handling back to bfd_install_relocation which will install
a section relative addend which is wrong. */
/* Sanity check the address (offset in section). */
if (reloc_entry->address > bfd_get_section_limit (input_bfd, input_section))
return bfd_reloc_outofrange;
ret = bfd_reloc_ok;
if (bfd_is_und_section (symbol->section)
&& output_bfd == NULL)
ret = bfd_reloc_undefined;
if (bfd_is_com_section (symbol->section)
|| output_bfd != NULL)
relocation = 0;
else
relocation = symbol->value;
/* Only do this for a final link. */
if (output_bfd == NULL)
{
relocation += symbol->section->output_section->vma;
relocation += symbol->section->output_offset;
}
relocation += reloc_entry->addend;
inplace_address = (bfd_byte *) data + reloc_entry->address;
#define DOIT(x) \
x = ( (x & ~reloc_entry->howto->dst_mask) | \
(((x & reloc_entry->howto->src_mask) + relocation) & \
reloc_entry->howto->dst_mask))
switch (reloc_entry->howto->size)
{
case 1:
{
short x = bfd_get_16 (input_bfd, inplace_address);
DOIT (x);
bfd_put_16 (input_bfd, (bfd_vma) x, inplace_address);
}
break;
case 2:
{
unsigned long x = bfd_get_32 (input_bfd, inplace_address);
DOIT (x);
bfd_put_32 (input_bfd, (bfd_vma)x , inplace_address);
}
break;
default:
BFD_ASSERT (0);
}
if (output_bfd != NULL)
reloc_entry->address += input_section->output_offset;
return ret;
}
/* Handle the R_M32R_SDA16 reloc.
This reloc is used to compute the address of objects in the small data area
and to perform loads and stores from that area.
The lower 16 bits are sign extended and added to the register specified
in the instruction, which is assumed to point to _SDA_BASE_. */
static bfd_reloc_status_type
m32r_elf_sda16_reloc (bfd *abfd ATTRIBUTE_UNUSED,
arelent *reloc_entry,
asymbol *symbol,
void * data ATTRIBUTE_UNUSED,
asection *input_section,
bfd *output_bfd,
char **error_message ATTRIBUTE_UNUSED)
{
/* This part is from bfd_elf_generic_reloc. */
if (output_bfd != NULL
&& (symbol->flags & BSF_SECTION_SYM) == 0
&& (! reloc_entry->howto->partial_inplace
|| reloc_entry->addend == 0))
{
reloc_entry->address += input_section->output_offset;
return bfd_reloc_ok;
}
if (output_bfd != NULL)
/* FIXME: See bfd_perform_relocation. Is this right? */
return bfd_reloc_continue;
/* FIXME: not sure what to do here yet. But then again, the linker
may never call us. */
abort ();
}
/* Handle the R_M32R_HI16_[SU]LO relocs.
HI16_SLO is for the add3 and load/store with displacement instructions.
HI16_ULO is for the or3 instruction.
For R_M32R_HI16_SLO, the lower 16 bits are sign extended when added to
the high 16 bytes so if the lower 16 bits are negative (bit 15 == 1) then
we must add one to the high 16 bytes (which will get subtracted off when
the low 16 bits are added).
These relocs have to be done in combination with an R_M32R_LO16 reloc
because there is a carry from the LO16 to the HI16. Here we just save
the information we need; we do the actual relocation when we see the LO16.
This code is copied from the elf32-mips.c. We also support an arbitrary
number of HI16 relocs to be associated with a single LO16 reloc. The
assembler sorts the relocs to ensure each HI16 immediately precedes its
LO16. However if there are multiple copies, the assembler may not find
the real LO16 so it picks the first one it finds. */
struct m32r_hi16
{
struct m32r_hi16 *next;
bfd_byte *addr;
bfd_vma addend;
};
/* FIXME: This should not be a static variable. */
static struct m32r_hi16 *m32r_hi16_list;
static bfd_reloc_status_type
m32r_elf_hi16_reloc (bfd *abfd ATTRIBUTE_UNUSED,
arelent *reloc_entry,
asymbol *symbol,
void * data,
asection *input_section,
bfd *output_bfd,
char **error_message ATTRIBUTE_UNUSED)
{
bfd_reloc_status_type ret;
bfd_vma relocation;
struct m32r_hi16 *n;
/* This part is from bfd_elf_generic_reloc.
If we're relocating, and this an external symbol, we don't want
to change anything. */
if (output_bfd != NULL
&& (symbol->flags & BSF_SECTION_SYM) == 0
&& reloc_entry->addend == 0)
{
reloc_entry->address += input_section->output_offset;
return bfd_reloc_ok;
}
/* Sanity check the address (offset in section). */
if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
return bfd_reloc_outofrange;
ret = bfd_reloc_ok;
if (bfd_is_und_section (symbol->section)
&& output_bfd == NULL)
ret = bfd_reloc_undefined;
if (bfd_is_com_section (symbol->section))
relocation = 0;
else
relocation = symbol->value;
relocation += symbol->section->output_section->vma;
relocation += symbol->section->output_offset;
relocation += reloc_entry->addend;
/* Save the information, and let LO16 do the actual relocation. */
n = bfd_malloc ((bfd_size_type) sizeof *n);
if (n == NULL)
return bfd_reloc_outofrange;
n->addr = (bfd_byte *) data + reloc_entry->address;
n->addend = relocation;
n->next = m32r_hi16_list;
m32r_hi16_list = n;
if (output_bfd != NULL)
reloc_entry->address += input_section->output_offset;
return ret;
}
/* Handle an M32R ELF HI16 reloc. */
static void
m32r_elf_relocate_hi16 (bfd *input_bfd,
int type,
Elf_Internal_Rela *relhi,
Elf_Internal_Rela *rello,
bfd_byte *contents,
bfd_vma addend)
{
unsigned long insn;
bfd_vma addlo;
insn = bfd_get_32 (input_bfd, contents + relhi->r_offset);
addlo = bfd_get_32 (input_bfd, contents + rello->r_offset);
if (type == R_M32R_HI16_SLO)
addlo = ((addlo & 0xffff) ^ 0x8000) - 0x8000;
else
addlo &= 0xffff;
addend += ((insn & 0xffff) << 16) + addlo;
/* Reaccount for sign extension of low part. */
if (type == R_M32R_HI16_SLO
&& (addend & 0x8000) != 0)
addend += 0x10000;
bfd_put_32 (input_bfd,
(insn & 0xffff0000) | ((addend >> 16) & 0xffff),
contents + relhi->r_offset);
}
/* Do an R_M32R_LO16 relocation. This is a straightforward 16 bit
inplace relocation; this function exists in order to do the
R_M32R_HI16_[SU]LO relocation described above. */
static bfd_reloc_status_type
m32r_elf_lo16_reloc (bfd *input_bfd,
arelent *reloc_entry,
asymbol *symbol,
void * data,
asection *input_section,
bfd *output_bfd,
char **error_message)
{
/* This part is from bfd_elf_generic_reloc.
If we're relocating, and this an external symbol, we don't want
to change anything. */
if (output_bfd != NULL
&& (symbol->flags & BSF_SECTION_SYM) == 0
&& reloc_entry->addend == 0)
{
reloc_entry->address += input_section->output_offset;
return bfd_reloc_ok;
}
if (m32r_hi16_list != NULL)
{
struct m32r_hi16 *l;
l = m32r_hi16_list;
while (l != NULL)
{
unsigned long insn;
unsigned long val;
unsigned long vallo;
struct m32r_hi16 *next;
/* Do the HI16 relocation. Note that we actually don't need
to know anything about the LO16 itself, except where to
find the low 16 bits of the addend needed by the LO16. */
insn = bfd_get_32 (input_bfd, l->addr);
vallo = ((bfd_get_32 (input_bfd, (bfd_byte *) data + reloc_entry->address)
& 0xffff) ^ 0x8000) - 0x8000;
val = ((insn & 0xffff) << 16) + vallo;
val += l->addend;
/* Reaccount for sign extension of low part. */
if ((val & 0x8000) != 0)
val += 0x10000;
insn = (insn &~ (bfd_vma) 0xffff) | ((val >> 16) & 0xffff);
bfd_put_32 (input_bfd, (bfd_vma) insn, l->addr);
next = l->next;
free (l);
l = next;
}
m32r_hi16_list = NULL;
}
/* Now do the LO16 reloc in the usual way.
??? It would be nice to call bfd_elf_generic_reloc here,
but we have partial_inplace set. bfd_elf_generic_reloc will
pass the handling back to bfd_install_relocation which will install
a section relative addend which is wrong. */
return m32r_elf_generic_reloc (input_bfd, reloc_entry, symbol, data,
input_section, output_bfd, error_message);
}
static reloc_howto_type m32r_elf_howto_table[] =
{
/* This reloc does nothing. */
HOWTO (R_M32R_NONE, /* type */
0, /* rightshift */
3, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_NONE", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
false), /* pcrel_offset */
/* A 16 bit absolute relocation. */
HOWTO (R_M32R_16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
m32r_elf_generic_reloc,/* special_function */
"R_M32R_16", /* name */
true, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* A 32 bit absolute relocation. */
HOWTO (R_M32R_32, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
m32r_elf_generic_reloc,/* special_function */
"R_M32R_32", /* name */
true, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
false), /* pcrel_offset */
/* A 24 bit address. */
HOWTO (R_M32R_24, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
24, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_unsigned, /* complain_on_overflow */
m32r_elf_generic_reloc,/* special_function */
"R_M32R_24", /* name */
true, /* partial_inplace */
0xffffff, /* src_mask */
0xffffff, /* dst_mask */
false), /* pcrel_offset */
/* An PC Relative 10-bit relocation, shifted by 2.
This reloc is complicated because relocations are relative to pc & -4.
i.e. branches in the right insn slot use the address of the left insn
slot for pc. */
/* ??? It's not clear whether this should have partial_inplace set or not.
Branch relaxing in the assembler can store the addend in the insn,
and if bfd_install_relocation gets called the addend may get added
again. */
HOWTO (R_M32R_10_PCREL, /* type */
2, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
10, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
m32r_elf_10_pcrel_reloc, /* special_function */
"R_M32R_10_PCREL", /* name */
false, /* partial_inplace */
0xff, /* src_mask */
0xff, /* dst_mask */
true), /* pcrel_offset */
/* A relative 18 bit relocation, right shifted by 2. */
HOWTO (R_M32R_18_PCREL, /* type */
2, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_18_PCREL", /* name */
false, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
true), /* pcrel_offset */
/* A relative 26 bit relocation, right shifted by 2. */
/* ??? It's not clear whether this should have partial_inplace set or not.
Branch relaxing in the assembler can store the addend in the insn,
and if bfd_install_relocation gets called the addend may get added
again. */
HOWTO (R_M32R_26_PCREL, /* type */
2, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
26, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_26_PCREL", /* name */
false, /* partial_inplace */
0xffffff, /* src_mask */
0xffffff, /* dst_mask */
true), /* pcrel_offset */
/* High 16 bits of address when lower 16 is or'd in. */
HOWTO (R_M32R_HI16_ULO, /* type */
16, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
m32r_elf_hi16_reloc, /* special_function */
"R_M32R_HI16_ULO", /* name */
true, /* partial_inplace */
0x0000ffff, /* src_mask */
0x0000ffff, /* dst_mask */
false), /* pcrel_offset */
/* High 16 bits of address when lower 16 is added in. */
HOWTO (R_M32R_HI16_SLO, /* type */
16, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
m32r_elf_hi16_reloc, /* special_function */
"R_M32R_HI16_SLO", /* name */
true, /* partial_inplace */
0x0000ffff, /* src_mask */
0x0000ffff, /* dst_mask */
false), /* pcrel_offset */
/* Lower 16 bits of address. */
HOWTO (R_M32R_LO16, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
m32r_elf_lo16_reloc, /* special_function */
"R_M32R_LO16", /* name */
true, /* partial_inplace */
0x0000ffff, /* src_mask */
0x0000ffff, /* dst_mask */
false), /* pcrel_offset */
/* Small data area 16 bits offset. */
HOWTO (R_M32R_SDA16, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
m32r_elf_sda16_reloc, /* special_function */
"R_M32R_SDA16", /* name */
true, /* partial_inplace */ /* FIXME: correct? */
0x0000ffff, /* src_mask */
0x0000ffff, /* dst_mask */
false), /* pcrel_offset */
/* GNU extension to record C++ vtable hierarchy. */
HOWTO (R_M32R_GNU_VTINHERIT, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
NULL, /* special_function */
"R_M32R_GNU_VTINHERIT", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
false), /* pcrel_offset */
/* GNU extension to record C++ vtable member usage. */
HOWTO (R_M32R_GNU_VTENTRY, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
_bfd_elf_rel_vtable_reloc_fn, /* special_function */
"R_M32R_GNU_VTENTRY", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
false), /* pcrel_offset */
EMPTY_HOWTO (13),
EMPTY_HOWTO (14),
EMPTY_HOWTO (15),
EMPTY_HOWTO (16),
EMPTY_HOWTO (17),
EMPTY_HOWTO (18),
EMPTY_HOWTO (19),
EMPTY_HOWTO (20),
EMPTY_HOWTO (21),
EMPTY_HOWTO (22),
EMPTY_HOWTO (23),
EMPTY_HOWTO (24),
EMPTY_HOWTO (25),
EMPTY_HOWTO (26),
EMPTY_HOWTO (27),
EMPTY_HOWTO (28),
EMPTY_HOWTO (29),
EMPTY_HOWTO (30),
EMPTY_HOWTO (31),
EMPTY_HOWTO (32),
/* A 16 bit absolute relocation. */
HOWTO (R_M32R_16_RELA, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_16_RELA", /* name */
false, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* A 32 bit absolute relocation. */
HOWTO (R_M32R_32_RELA, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc,/* special_function */
"R_M32R_32_RELA", /* name */
false, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
false), /* pcrel_offset */
/* A 24 bit address. */
HOWTO (R_M32R_24_RELA, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
24, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_unsigned, /* complain_on_overflow */
bfd_elf_generic_reloc,/* special_function */
"R_M32R_24_RELA", /* name */
false, /* partial_inplace */
0xffffff, /* src_mask */
0xffffff, /* dst_mask */
false), /* pcrel_offset */
HOWTO (R_M32R_10_PCREL_RELA, /* type */
2, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
10, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
m32r_elf_10_pcrel_reloc, /* special_function */
"R_M32R_10_PCREL_RELA",/* name */
false, /* partial_inplace */
0xff, /* src_mask */
0xff, /* dst_mask */
true), /* pcrel_offset */
/* A relative 18 bit relocation, right shifted by 2. */
HOWTO (R_M32R_18_PCREL_RELA, /* type */
2, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_18_PCREL_RELA",/* name */
false, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
true), /* pcrel_offset */
/* A relative 26 bit relocation, right shifted by 2. */
HOWTO (R_M32R_26_PCREL_RELA, /* type */
2, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
26, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_26_PCREL_RELA",/* name */
false, /* partial_inplace */
0xffffff, /* src_mask */
0xffffff, /* dst_mask */
true), /* pcrel_offset */
/* High 16 bits of address when lower 16 is or'd in. */
HOWTO (R_M32R_HI16_ULO_RELA, /* type */
16, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_HI16_ULO_RELA",/* name */
false, /* partial_inplace */
0x0000ffff, /* src_mask */
0x0000ffff, /* dst_mask */
false), /* pcrel_offset */
/* High 16 bits of address when lower 16 is added in. */
HOWTO (R_M32R_HI16_SLO_RELA, /* type */
16, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_HI16_SLO_RELA",/* name */
false, /* partial_inplace */
0x0000ffff, /* src_mask */
0x0000ffff, /* dst_mask */
false), /* pcrel_offset */
/* Lower 16 bits of address. */
HOWTO (R_M32R_LO16_RELA, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_LO16_RELA", /* name */
false, /* partial_inplace */
0x0000ffff, /* src_mask */
0x0000ffff, /* dst_mask */
false), /* pcrel_offset */
/* Small data area 16 bits offset. */
HOWTO (R_M32R_SDA16_RELA, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_SDA16_RELA", /* name */
true, /* partial_inplace */ /* FIXME: correct? */
0x0000ffff, /* src_mask */
0x0000ffff, /* dst_mask */
false), /* pcrel_offset */
/* GNU extension to record C++ vtable hierarchy. */
HOWTO (R_M32R_RELA_GNU_VTINHERIT, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
NULL, /* special_function */
"R_M32R_RELA_GNU_VTINHERIT", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
false), /* pcrel_offset */
/* GNU extension to record C++ vtable member usage. */
HOWTO (R_M32R_RELA_GNU_VTENTRY, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
_bfd_elf_rel_vtable_reloc_fn, /* special_function */
"R_M32R_RELA_GNU_VTENTRY", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
false), /* pcrel_offset */
/* A 32 bit PC relative relocation. */
HOWTO (R_M32R_REL32, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc,/* special_function */
"R_M32R_REL32", /* name */
false, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
true), /* pcrel_offset */
EMPTY_HOWTO (46),
EMPTY_HOWTO (47),
/* Like R_M32R_24, but referring to the GOT table entry for
the symbol. */
HOWTO (R_M32R_GOT24, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
24, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_unsigned, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_GOT24", /* name */
false, /* partial_inplace */
0xffffff, /* src_mask */
0xffffff, /* dst_mask */
false), /* pcrel_offset */
/* Like R_M32R_PCREL, but referring to the procedure linkage table
entry for the symbol. */
HOWTO (R_M32R_26_PLTREL, /* type */
2, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
24, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_26_PLTREL", /* name */
false, /* partial_inplace */
0xffffff, /* src_mask */
0xffffff, /* dst_mask */
true), /* pcrel_offset */
/* This is used only by the dynamic linker. The symbol should exist
both in the object being run and in some shared library. The
dynamic linker copies the data addressed by the symbol from the
shared library into the object, because the object being
run has to have the data at some particular address. */
HOWTO (R_M32R_COPY, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_COPY", /* name */
false, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
false), /* pcrel_offset */
/* Like R_M32R_24, but used when setting global offset table
entries. */
HOWTO (R_M32R_GLOB_DAT, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_GLOB_DAT", /* name */
false, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
false), /* pcrel_offset */
/* Marks a procedure linkage table entry for a symbol. */
HOWTO (R_M32R_JMP_SLOT, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_JMP_SLOT", /* name */
false, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
false), /* pcrel_offset */
/* Used only by the dynamic linker. When the object is run, this
longword is set to the load address of the object, plus the
addend. */
HOWTO (R_M32R_RELATIVE, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_RELATIVE", /* name */
false, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
false), /* pcrel_offset */
HOWTO (R_M32R_GOTOFF, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
24, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_GOTOFF", /* name */
false, /* partial_inplace */
0xffffff, /* src_mask */
0xffffff, /* dst_mask */
false), /* pcrel_offset */
/* An PC Relative 24-bit relocation used when setting PIC offset
table register. */
HOWTO (R_M32R_GOTPC24, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
24, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_unsigned, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_GOTPC24", /* name */
false, /* partial_inplace */
0xffffff, /* src_mask */
0xffffff, /* dst_mask */
true), /* pcrel_offset */
/* Like R_M32R_HI16_ULO, but referring to the GOT table entry for
the symbol. */
HOWTO (R_M32R_GOT16_HI_ULO, /* type */
16, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_GOT16_HI_ULO", /* name */
false, /* partial_inplace */
0x0000ffff, /* src_mask */
0x0000ffff, /* dst_mask */
false), /* pcrel_offset */
/* Like R_M32R_HI16_SLO, but referring to the GOT table entry for
the symbol. */
HOWTO (R_M32R_GOT16_HI_SLO, /* type */
16, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_GOT16_HI_SLO", /* name */
false, /* partial_inplace */
0x0000ffff, /* src_mask */
0x0000ffff, /* dst_mask */
false), /* pcrel_offset */
/* Like R_M32R_LO16, but referring to the GOT table entry for
the symbol. */
HOWTO (R_M32R_GOT16_LO, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_GOT16_LO", /* name */
false, /* partial_inplace */
0x0000ffff, /* src_mask */
0x0000ffff, /* dst_mask */
false), /* pcrel_offset */
/* An PC Relative relocation used when setting PIC offset table register.
Like R_M32R_HI16_ULO, but referring to the GOT table entry for
the symbol. */
HOWTO (R_M32R_GOTPC_HI_ULO, /* type */
16, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_GOTPC_HI_ULO", /* name */
false, /* partial_inplace */
0x0000ffff, /* src_mask */
0x0000ffff, /* dst_mask */
true), /* pcrel_offset */
/* An PC Relative relocation used when setting PIC offset table register.
Like R_M32R_HI16_SLO, but referring to the GOT table entry for
the symbol. */
HOWTO (R_M32R_GOTPC_HI_SLO, /* type */
16, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_GOTPC_HI_SLO", /* name */
false, /* partial_inplace */
0x0000ffff, /* src_mask */
0x0000ffff, /* dst_mask */
true), /* pcrel_offset */
/* An PC Relative relocation used when setting PIC offset table register.
Like R_M32R_LO16, but referring to the GOT table entry for
the symbol. */
HOWTO (R_M32R_GOTPC_LO, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_GOTPC_LO", /* name */
false, /* partial_inplace */
0x0000ffff, /* src_mask */
0x0000ffff, /* dst_mask */
true), /* pcrel_offset */
HOWTO (R_M32R_GOTOFF_HI_ULO, /* type */
16, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_GOTOFF_HI_ULO",/* name */
false, /* partial_inplace */
0x0000ffff, /* src_mask */
0x0000ffff, /* dst_mask */
false), /* pcrel_offset */
HOWTO (R_M32R_GOTOFF_HI_SLO, /* type */
16, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_GOTOFF_HI_SLO",/* name */
false, /* partial_inplace */
0x0000ffff, /* src_mask */
0x0000ffff, /* dst_mask */
false), /* pcrel_offset */
HOWTO (R_M32R_GOTOFF_LO, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32R_GOTOFF_LO", /* name */
false, /* partial_inplace */
0x0000ffff, /* src_mask */
0x0000ffff, /* dst_mask */
false), /* pcrel_offset */
};
/* Map BFD reloc types to M32R ELF reloc types. */
struct m32r_reloc_map
{
bfd_reloc_code_real_type bfd_reloc_val;
unsigned char elf_reloc_val;
};
#ifdef USE_M32R_OLD_RELOC
static const struct m32r_reloc_map m32r_reloc_map_old[] =
{
{ BFD_RELOC_NONE, R_M32R_NONE },
{ BFD_RELOC_16, R_M32R_16 },
{ BFD_RELOC_32, R_M32R_32 },
{ BFD_RELOC_M32R_24, R_M32R_24 },
{ BFD_RELOC_M32R_10_PCREL, R_M32R_10_PCREL },
{ BFD_RELOC_M32R_18_PCREL, R_M32R_18_PCREL },
{ BFD_RELOC_M32R_26_PCREL, R_M32R_26_PCREL },
{ BFD_RELOC_M32R_HI16_ULO, R_M32R_HI16_ULO },
{ BFD_RELOC_M32R_HI16_SLO, R_M32R_HI16_SLO },
{ BFD_RELOC_M32R_LO16, R_M32R_LO16 },
{ BFD_RELOC_M32R_SDA16, R_M32R_SDA16 },
{ BFD_RELOC_VTABLE_INHERIT, R_M32R_GNU_VTINHERIT },
{ BFD_RELOC_VTABLE_ENTRY, R_M32R_GNU_VTENTRY },
};
#else
static const struct m32r_reloc_map m32r_reloc_map[] =
{
{ BFD_RELOC_NONE, R_M32R_NONE },
{ BFD_RELOC_16, R_M32R_16_RELA },
{ BFD_RELOC_32, R_M32R_32_RELA },
{ BFD_RELOC_M32R_24, R_M32R_24_RELA },
{ BFD_RELOC_M32R_10_PCREL, R_M32R_10_PCREL_RELA },
{ BFD_RELOC_M32R_18_PCREL, R_M32R_18_PCREL_RELA },
{ BFD_RELOC_M32R_26_PCREL, R_M32R_26_PCREL_RELA },
{ BFD_RELOC_M32R_HI16_ULO, R_M32R_HI16_ULO_RELA },
{ BFD_RELOC_M32R_HI16_SLO, R_M32R_HI16_SLO_RELA },
{ BFD_RELOC_M32R_LO16, R_M32R_LO16_RELA },
{ BFD_RELOC_M32R_SDA16, R_M32R_SDA16_RELA },
{ BFD_RELOC_VTABLE_INHERIT, R_M32R_RELA_GNU_VTINHERIT },
{ BFD_RELOC_VTABLE_ENTRY, R_M32R_RELA_GNU_VTENTRY },
{ BFD_RELOC_32_PCREL, R_M32R_REL32 },
{ BFD_RELOC_M32R_GOT24, R_M32R_GOT24 },
{ BFD_RELOC_M32R_26_PLTREL, R_M32R_26_PLTREL },
{ BFD_RELOC_M32R_COPY, R_M32R_COPY },
{ BFD_RELOC_M32R_GLOB_DAT, R_M32R_GLOB_DAT },
{ BFD_RELOC_M32R_JMP_SLOT, R_M32R_JMP_SLOT },
{ BFD_RELOC_M32R_RELATIVE, R_M32R_RELATIVE },
{ BFD_RELOC_M32R_GOTOFF, R_M32R_GOTOFF },
{ BFD_RELOC_M32R_GOTPC24, R_M32R_GOTPC24 },
{ BFD_RELOC_M32R_GOT16_HI_ULO, R_M32R_GOT16_HI_ULO },
{ BFD_RELOC_M32R_GOT16_HI_SLO, R_M32R_GOT16_HI_SLO },
{ BFD_RELOC_M32R_GOT16_LO, R_M32R_GOT16_LO },
{ BFD_RELOC_M32R_GOTPC_HI_ULO, R_M32R_GOTPC_HI_ULO },
{ BFD_RELOC_M32R_GOTPC_HI_SLO, R_M32R_GOTPC_HI_SLO },
{ BFD_RELOC_M32R_GOTPC_LO, R_M32R_GOTPC_LO },
{ BFD_RELOC_M32R_GOTOFF_HI_ULO, R_M32R_GOTOFF_HI_ULO },
{ BFD_RELOC_M32R_GOTOFF_HI_SLO, R_M32R_GOTOFF_HI_SLO },
{ BFD_RELOC_M32R_GOTOFF_LO, R_M32R_GOTOFF_LO },
};
#endif
static reloc_howto_type *
bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
bfd_reloc_code_real_type code)
{
unsigned int i;
#ifdef USE_M32R_OLD_RELOC
for (i = 0;
i < sizeof (m32r_reloc_map_old) / sizeof (struct m32r_reloc_map);
i++)
if (m32r_reloc_map_old[i].bfd_reloc_val == code)
return &m32r_elf_howto_table[m32r_reloc_map_old[i].elf_reloc_val];
#else /* ! USE_M32R_OLD_RELOC */
for (i = 0;
i < sizeof (m32r_reloc_map) / sizeof (struct m32r_reloc_map);
i++)
if (m32r_reloc_map[i].bfd_reloc_val == code)
return &m32r_elf_howto_table[m32r_reloc_map[i].elf_reloc_val];
#endif
return NULL;
}
static reloc_howto_type *
bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
const char *r_name)
{
unsigned int i;
for (i = 0;
i < sizeof (m32r_elf_howto_table) / sizeof (m32r_elf_howto_table[0]);
i++)
if (m32r_elf_howto_table[i].name != NULL
&& strcasecmp (m32r_elf_howto_table[i].name, r_name) == 0)
return &m32r_elf_howto_table[i];
return NULL;
}
/* Set the howto pointer for an M32R ELF reloc. */
static bool
m32r_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
arelent *cache_ptr,
Elf_Internal_Rela *dst)
{
unsigned int r_type;
r_type = ELF32_R_TYPE (dst->r_info);
if (r_type > (unsigned int) R_M32R_GNU_VTENTRY)
{
/* xgettext:c-format */
_bfd_error_handler (_("%pB: unsupported relocation type %#x"),
abfd, r_type);
bfd_set_error (bfd_error_bad_value);
return false;
}
cache_ptr->howto = &m32r_elf_howto_table[r_type];
return true;
}
static bool
m32r_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
arelent *cache_ptr,
Elf_Internal_Rela *dst)
{
unsigned int r_type = ELF32_R_TYPE (dst->r_info);
if (r_type == (unsigned int) R_M32R_NONE
|| ((r_type > (unsigned int) R_M32R_GNU_VTENTRY)
&& (r_type < (unsigned int) R_M32R_max)))
{
cache_ptr->howto = &m32r_elf_howto_table[r_type];
return true;
}
/* xgettext:c-format */
_bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, r_type);
bfd_set_error (bfd_error_bad_value);
return false;
}
/* Given a BFD section, try to locate the corresponding ELF section
index. */
static bool
_bfd_m32r_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
asection *sec,
int *retval)
{
if (strcmp (bfd_section_name (sec), ".scommon") == 0)
{
*retval = SHN_M32R_SCOMMON;
return true;
}
return false;
}
/* M32R ELF uses two common sections. One is the usual one, and the other
is for small objects. All the small objects are kept together, and then
referenced via one register, which yields faster assembler code. It is
up to the compiler to emit an instruction to load the register with
_SDA_BASE. This is what we use for the small common section. This
approach is copied from elf32-mips.c. */
static asection m32r_elf_scom_section;
static const asymbol m32r_elf_scom_symbol =
GLOBAL_SYM_INIT (".scommon", &m32r_elf_scom_section);
static asection m32r_elf_scom_section =
BFD_FAKE_SECTION (m32r_elf_scom_section, &m32r_elf_scom_symbol,
".scommon", 0, SEC_IS_COMMON | SEC_SMALL_DATA);
/* Handle the special M32R section numbers that a symbol may use. */
static void
_bfd_m32r_elf_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, asymbol *asym)
{
elf_symbol_type *elfsym = (elf_symbol_type *) asym;
switch (elfsym->internal_elf_sym.st_shndx)
{
case SHN_M32R_SCOMMON:
asym->section = &m32r_elf_scom_section;
asym->value = elfsym->internal_elf_sym.st_size;
break;
}
}
/* Hook called by the linker routine which adds symbols from an object
file. We must handle the special M32R section numbers here.
We also keep watching for whether we need to create the sdata special
linker sections. */
static bool
m32r_elf_add_symbol_hook (bfd *abfd,
struct bfd_link_info *info,
Elf_Internal_Sym *sym,
const char **namep,
flagword *flagsp ATTRIBUTE_UNUSED,
asection **secp,
bfd_vma *valp)
{
if (! bfd_link_relocatable (info)
&& (*namep)[0] == '_' && (*namep)[1] == 'S'
&& strcmp (*namep, "_SDA_BASE_") == 0
&& is_elf_hash_table (info->hash))
{
/* This is simpler than using _bfd_elf_create_linker_section
(our needs are simpler than ppc's needs). Also
_bfd_elf_create_linker_section currently has a bug where if a .sdata
section already exists a new one is created that follows it which
screws of _SDA_BASE_ address calcs because output_offset != 0. */
struct elf_link_hash_entry *h;
struct bfd_link_hash_entry *bh;
asection *s = bfd_get_section_by_name (abfd, ".sdata");
/* The following code was cobbled from elf32-ppc.c and elflink.c. */
if (s == NULL)
{
flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
| SEC_IN_MEMORY | SEC_LINKER_CREATED);
s = bfd_make_section_anyway_with_flags (abfd, ".sdata",
flags);
if (s == NULL)
return false;
if (!bfd_set_section_alignment (s, 2))
return false;
}
bh = bfd_link_hash_lookup (info->hash, "_SDA_BASE_",
false, false, false);
if ((bh == NULL || bh->type == bfd_link_hash_undefined)
&& !(_bfd_generic_link_add_one_symbol (info,
abfd,
"_SDA_BASE_",
BSF_GLOBAL,
s,
(bfd_vma) 32768,
NULL,
false,
get_elf_backend_data (abfd)->collect,
&bh)))
return false;
h = (struct elf_link_hash_entry *) bh;
h->type = STT_OBJECT;
}
switch (sym->st_shndx)
{
case SHN_M32R_SCOMMON:
*secp = bfd_make_section_old_way (abfd, ".scommon");
(*secp)->flags |= SEC_IS_COMMON | SEC_SMALL_DATA;
*valp = sym->st_size;
break;
}
return true;
}
/* We have to figure out the SDA_BASE value, so that we can adjust the
symbol value correctly. We look up the symbol _SDA_BASE_ in the output
BFD. If we can't find it, we're stuck. We cache it in the ELF
target data. We don't need to adjust the symbol value for an
external symbol if we are producing relocatable output. */
static bfd_reloc_status_type
m32r_elf_final_sda_base (bfd *output_bfd,
struct bfd_link_info *info,
const char **error_message,
bfd_vma *psb)
{
if (elf_gp (output_bfd) == 0)
{
struct bfd_link_hash_entry *h;
h = bfd_link_hash_lookup (info->hash, "_SDA_BASE_", false, false, true);
if (h != NULL && h->type == bfd_link_hash_defined)
elf_gp (output_bfd) = (h->u.def.value
+ h->u.def.section->output_section->vma
+ h->u.def.section->output_offset);
else
{
/* Only get the error once. */
*psb = elf_gp (output_bfd) = 4;
*error_message =
(const char *) _("SDA relocation when _SDA_BASE_ not defined");
return bfd_reloc_dangerous;
}
}
*psb = elf_gp (output_bfd);
return bfd_reloc_ok;
}
/* Return size of a PLT entry. */
#define elf_m32r_sizeof_plt(info) PLT_ENTRY_SIZE
/* The m32r linker needs to keep track of the number of relocs that it
decides to copy in check_relocs for each symbol. This is so that
it can discard PC relative relocs if it doesn't need them when
linking with -Bsymbolic. We store the information in a field
extending the regular ELF linker hash table. */
/* This structure keeps track of the number of PC relative relocs we
have copied for a given symbol. */
struct elf_m32r_pcrel_relocs_copied
{
/* Next section. */
struct elf_m32r_pcrel_relocs_copied *next;
/* A section in dynobj. */
asection *section;
/* Number of relocs copied in this section. */
bfd_size_type count;
};
/* Traverse an m32r ELF linker hash table. */
#define m32r_elf_link_hash_traverse(table, func, info) \
(elf_link_hash_traverse \
(&(table)->root, \
(bool (*) (struct elf_link_hash_entry *, void *)) (func), \
(info)))
/* Get the m32r ELF linker hash table from a link_info structure. */
#define m32r_elf_hash_table(p) \
((is_elf_hash_table ((p)->hash) \
&& elf_hash_table_id (elf_hash_table (p)) == M32R_ELF_DATA) \
? (struct elf_link_hash_table *) (p)->hash : NULL)
/* Create an m32r ELF linker hash table. */
static struct bfd_link_hash_table *
m32r_elf_link_hash_table_create (bfd *abfd)
{
struct elf_link_hash_table *ret;
size_t amt = sizeof (struct elf_link_hash_table);
ret = bfd_zmalloc (amt);
if (ret == NULL)
return NULL;
if (!_bfd_elf_link_hash_table_init (ret, abfd,
_bfd_elf_link_hash_newfunc,
sizeof (struct elf_link_hash_entry),
M32R_ELF_DATA))
{
free (ret);
return NULL;
}
return &ret->root;
}
/* Create dynamic sections when linking against a dynamic object. */
static bool
m32r_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
{
struct elf_link_hash_table *htab;
flagword flags, pltflags;
asection *s;
const struct elf_backend_data *bed = get_elf_backend_data (abfd);
int ptralign = 2; /* 32bit */
htab = m32r_elf_hash_table (info);
if (htab == NULL)
return false;
/* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
.rel[a].bss sections. */
flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
| SEC_LINKER_CREATED);
pltflags = flags;
pltflags |= SEC_CODE;
if (bed->plt_not_loaded)
pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS);
if (bed->plt_readonly)
pltflags |= SEC_READONLY;
s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags);
htab->splt = s;
if (s == NULL
|| !bfd_set_section_alignment (s, bed->plt_alignment))
return false;
if (bed->want_plt_sym)
{
/* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
.plt section. */
struct bfd_link_hash_entry *bh = NULL;
struct elf_link_hash_entry *h;
if (! (_bfd_generic_link_add_one_symbol
(info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
(bfd_vma) 0, NULL, false,
get_elf_backend_data (abfd)->collect, &bh)))
return false;
h = (struct elf_link_hash_entry *) bh;
h->def_regular = 1;
h->type = STT_OBJECT;
htab->hplt = h;
if (bfd_link_pic (info)
&& ! bfd_elf_link_record_dynamic_symbol (info, h))
return false;
}
s = bfd_make_section_anyway_with_flags (abfd,
bed->default_use_rela_p
? ".rela.plt" : ".rel.plt",
flags | SEC_READONLY);
htab->srelplt = s;
if (s == NULL
|| !bfd_set_section_alignment (s, ptralign))
return false;
if (htab->sgot == NULL
&& !_bfd_elf_create_got_section (abfd, info))
return false;
if (bed->want_dynbss)
{
/* The .dynbss section is a place to put symbols which are defined
by dynamic objects, are referenced by regular objects, and are
not functions. We must allocate space for them in the process
image and use a R_*_COPY reloc to tell the dynamic linker to
initialize them at run time. The linker script puts the .dynbss
section into the .bss section of the final image. */
s = bfd_make_section_anyway_with_flags (abfd, ".dynbss",
SEC_ALLOC | SEC_LINKER_CREATED);
htab->sdynbss = s;
if (s == NULL)
return false;
/* The .rel[a].bss section holds copy relocs. This section is not
normally needed. We need to create it here, though, so that the
linker will map it to an output section. We can't just create it
only if we need it, because we will not know whether we need it
until we have seen all the input files, and the first time the
main linker code calls BFD after examining all the input files
(size_dynamic_sections) the input sections have already been
mapped to the output sections. If the section turns out not to
be needed, we can discard it later. We will never need this
section when generating a shared object, since they do not use
copy relocs. */
if (! bfd_link_pic (info))
{
s = bfd_make_section_anyway_with_flags (abfd,
(bed->default_use_rela_p
? ".rela.bss" : ".rel.bss"),
flags | SEC_READONLY);
htab->srelbss = s;
if (s == NULL
|| !bfd_set_section_alignment (s, ptralign))
return false;
}
}
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 bool
m32r_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
struct elf_link_hash_entry *h)
{
struct elf_link_hash_table *htab;
bfd *dynobj;
asection *s;
#ifdef DEBUG_PIC
printf ("m32r_elf_adjust_dynamic_symbol()\n");
#endif
dynobj = elf_hash_table (info)->dynobj;
/* Make sure we know what is going on here. */
BFD_ASSERT (dynobj != NULL
&& (h->needs_plt
|| h->is_weakalias
|| (h->def_dynamic
&& h->ref_regular
&& !h->def_regular)));
/* If this is a function, put it in the procedure linkage table. We
will fill in the contents of the procedure linkage table later,
when we know the address of the .got section. */
if (h->type == STT_FUNC
|| h->needs_plt)
{
if (! bfd_link_pic (info)
&& !h->def_dynamic
&& !h->ref_dynamic
&& h->root.type != bfd_link_hash_undefweak
&& h->root.type != bfd_link_hash_undefined)
{
/* This case can occur if we saw a PLT reloc in an input
file, but the symbol was never referred to by a dynamic
object. In such a case, we don't actually need to build
a procedure linkage table, and we can just do a PCREL
reloc instead. */
h->plt.offset = (bfd_vma) -1;
h->needs_plt = 0;
}
return true;
}
else
h->plt.offset = (bfd_vma) -1;
/* If this is a weak symbol, and there is a real definition, the
processor independent code will have arranged for us to see the
real definition first, and we can just use the same value. */
if (h->is_weakalias)
{
struct elf_link_hash_entry *def = weakdef (h);
BFD_ASSERT (def->root.type == bfd_link_hash_defined);
h->root.u.def.section = def->root.u.def.section;
h->root.u.def.value = def->root.u.def.value;
return true;
}
/* This is a reference to a symbol defined by a dynamic object which
is not a function. */
/* If we are creating a shared library, we must presume that the
only references to the symbol are via the global offset table.
For such cases we need not do anything here; the relocations will
be handled correctly by relocate_section. */
if (bfd_link_pic (info))
return true;
/* If there are no references to this symbol that do not use the
GOT, we don't need to generate a copy reloc. */
if (!h->non_got_ref)
return true;
/* If -z nocopyreloc was given, we won't generate them either. */
if (0 && info->nocopyreloc)
{
h->non_got_ref = 0;
return true;
}
/* If we don't find any dynamic relocs in read-only sections, then
we'll be keeping the dynamic relocs and avoiding the copy reloc. */
if (0 && !_bfd_elf_readonly_dynrelocs (h))
{
h->non_got_ref = 0;
return true;
}
/* We must allocate the symbol in our .dynbss section, which will
become part of the .bss section of the executable. There will be
an entry for this symbol in the .dynsym section. The dynamic
object will contain position independent code, so all references
from the dynamic object to this symbol will go through the global
offset table. The dynamic linker will use the .dynsym entry to
determine the address it must put in the global offset table, so
both the dynamic object and the regular object will refer to the
same memory location for the variable. */
htab = m32r_elf_hash_table (info);
if (htab == NULL)
return false;
s = htab->sdynbss;
BFD_ASSERT (s != NULL);
/* We must generate a R_M32R_COPY reloc to tell the dynamic linker
to copy the initial value out of the dynamic object and into the
runtime process image. We need to remember the offset into the
.rela.bss section we are going to use. */
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
{
asection *srel;
srel = htab->srelbss;
BFD_ASSERT (srel != NULL);
srel->size += sizeof (Elf32_External_Rela);
h->needs_copy = 1;
}
return _bfd_elf_adjust_dynamic_copy (info, h, s);
}
/* Allocate space in .plt, .got and associated reloc sections for
dynamic relocs. */
static bool
allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
{
struct bfd_link_info *info;
struct elf_link_hash_table *htab;
struct elf_dyn_relocs *p;
if (h->root.type == bfd_link_hash_indirect)
return true;
info = (struct bfd_link_info *) inf;
htab = m32r_elf_hash_table (info);
if (htab == NULL)
return false;
if (htab->dynamic_sections_created
&& h->plt.refcount > 0)
{
/* Make sure this symbol is output as a dynamic symbol.
Undefined weak syms won't yet be marked as dynamic. */
if (h->dynindx == -1
&& !h->forced_local)
{
if (! bfd_elf_link_record_dynamic_symbol (info, h))
return false;
}
if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
{
asection *s = htab->splt;
/* If this is the first .plt entry, make room for the special
first entry. */
if (s->size == 0)
s->size += PLT_ENTRY_SIZE;
h->plt.offset = s->size;
/* If this symbol is not defined in a regular file, and we are
not generating a shared library, then set the symbol to this
location in the .plt. This is required to make function
pointers compare as equal between the normal executable and
the shared library. */
if (! bfd_link_pic (info)
&& !h->def_regular)
{
h->root.u.def.section = s;
h->root.u.def.value = h->plt.offset;
}
/* Make room for this entry. */
s->size += PLT_ENTRY_SIZE;
/* We also need to make an entry in the .got.plt section, which
will be placed in the .got section by the linker script. */
htab->sgotplt->size += 4;
/* We also need to make an entry in the .rel.plt section. */
htab->srelplt->size += sizeof (Elf32_External_Rela);
}
else
{
h->plt.offset = (bfd_vma) -1;
h->needs_plt = 0;
}
}
else
{
h->plt.offset = (bfd_vma) -1;
h->needs_plt = 0;
}
if (h->got.refcount > 0)
{
asection *s;
bool dyn;
/* Make sure this symbol is output as a dynamic symbol.
Undefined weak syms won't yet be marked as dynamic. */
if (h->dynindx == -1
&& !h->forced_local)
{
if (! bfd_elf_link_record_dynamic_symbol (info, h))
return false;
}
s = htab->sgot;
h->got.offset = s->size;
s->size += 4;
dyn = htab->dynamic_sections_created;
if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h))
htab->srelgot->size += sizeof (Elf32_External_Rela);
}
else
h->got.offset = (bfd_vma) -1;
if (h->dyn_relocs == NULL)
return true;
/* In the shared -Bsymbolic case, discard space allocated for
dynamic pc-relative relocs against symbols which turn out to be
defined in regular objects. For the normal shared case, discard
space for pc-relative relocs that have become local due to symbol
visibility changes. */
if (bfd_link_pic (info))
{
if (h->def_regular
&& (h->forced_local
|| info->symbolic))
{
struct elf_dyn_relocs **pp;
for (pp = &h->dyn_relocs; (p = *pp) != NULL;)
{
p->count -= p->pc_count;
p->pc_count = 0;
if (p->count == 0)
*pp = p->next;
else
pp = &p->next;
}
}
/* Also discard relocs on undefined weak syms with non-default
visibility. */
if (h->dyn_relocs != NULL
&& h->root.type == bfd_link_hash_undefweak)
{
if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
h->dyn_relocs = NULL;
/* Make sure undefined weak symbols are output as a dynamic
symbol in PIEs. */
else if (h->dynindx == -1
&& !h->forced_local)
{
if (! bfd_elf_link_record_dynamic_symbol (info, h))
return false;
}
}
}
else
{
/* For the non-shared case, discard space for relocs against
symbols which turn out to need copy relocs or are not
dynamic. */
if (!h->non_got_ref
&& ((h->def_dynamic
&& !h->def_regular)
|| (htab->dynamic_sections_created
&& (h->root.type == bfd_link_hash_undefweak
|| h->root.type == bfd_link_hash_undefined))))
{
/* Make sure this symbol is output as a dynamic symbol.
Undefined weak syms won't yet be marked as dynamic. */
if (h->dynindx == -1
&& !h->forced_local)
{
if (! bfd_elf_link_record_dynamic_symbol (info, h))
return false;
}
/* If that succeeded, we know we'll be keeping all the
relocs. */
if (h->dynindx != -1)
goto keep;
}
h->dyn_relocs = NULL;
keep: ;
}
/* Finally, allocate space. */
for (p = h->dyn_relocs; p != NULL; p = p->next)
{
asection *sreloc = elf_section_data (p->sec)->sreloc;
sreloc->size += p->count * sizeof (Elf32_External_Rela);
}
return true;
}
/* Set the sizes of the dynamic sections. */
static bool
m32r_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
struct bfd_link_info *info)
{
struct elf_link_hash_table *htab;
bfd *dynobj;
asection *s;
bool relocs;
bfd *ibfd;
#ifdef DEBUG_PIC
printf ("m32r_elf_size_dynamic_sections()\n");
#endif
htab = m32r_elf_hash_table (info);
if (htab == NULL)
return false;
dynobj = htab->dynobj;
BFD_ASSERT (dynobj != NULL);
if (htab->dynamic_sections_created)
{
/* Set the contents of the .interp section to the interpreter. */
if (bfd_link_executable (info) && !info->nointerp)
{
s = bfd_get_linker_section (dynobj, ".interp");
BFD_ASSERT (s != NULL);
s->size = sizeof ELF_DYNAMIC_INTERPRETER;
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
}
}
/* Set up .got offsets for local syms, and space for local dynamic
relocs. */
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
{
bfd_signed_vma *local_got;
bfd_signed_vma *end_local_got;
bfd_size_type locsymcount;
Elf_Internal_Shdr *symtab_hdr;
asection *srel;
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
continue;
for (s = ibfd->sections; s != NULL; s = s->next)
{
struct elf_dyn_relocs *p;
for (p = ((struct elf_dyn_relocs *)
elf_section_data (s)->local_dynrel);
p != NULL;
p = p->next)
{
if (! bfd_is_abs_section (p->sec)
&& bfd_is_abs_section (p->sec->output_section))
{
/* Input section has been discarded, either because
it is a copy of a linkonce section or due to
linker script /DISCARD/, so we'll be discarding
the relocs too. */
}
else if (p->count != 0)
{
srel = elf_section_data (p->sec)->sreloc;
srel->size += p->count * sizeof (Elf32_External_Rela);
if ((p->sec->output_section->flags & SEC_READONLY) != 0)
info->flags |= DF_TEXTREL;
}
}
}
local_got = elf_local_got_refcounts (ibfd);
if (!local_got)
continue;
symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
locsymcount = symtab_hdr->sh_info;
end_local_got = local_got + locsymcount;
s = htab->sgot;
srel = htab->srelgot;
for (; local_got < end_local_got; ++local_got)
{
if (*local_got > 0)
{
*local_got = s->size;
s->size += 4;
if (bfd_link_pic (info))
srel->size += sizeof (Elf32_External_Rela);
}
else
*local_got = (bfd_vma) -1;
}
}
/* Allocate global sym .plt and .got entries, and space for global
sym dynamic relocs. */
elf_link_hash_traverse (htab, allocate_dynrelocs, info);
/* We now have determined the sizes of the various dynamic sections.
Allocate memory for them. */
relocs = false;
for (s = dynobj->sections; s != NULL; s = s->next)
{
if ((s->flags & SEC_LINKER_CREATED) == 0)
continue;
if (s == htab->splt
|| s == htab->sgot
|| s == htab->sgotplt
|| s == htab->sdynbss)
{
/* Strip this section if we don't need it; see the
comment below. */
}
else if (startswith (bfd_section_name (s), ".rela"))
{
if (s->size != 0 && s != htab->srelplt)
relocs = true;
/* We use the reloc_count field as a counter if we need
to copy relocs into the output file. */
s->reloc_count = 0;
}
else
/* It's not one of our sections, so don't allocate space. */
continue;
if (s->size == 0)
{
/* If we don't need this section, strip it from the
output file. This is mostly to handle .rela.bss and
.rela.plt. We must create both sections in
create_dynamic_sections, because they must be created
before the linker maps input sections to output
sections. The linker does that before
adjust_dynamic_symbol is called, and it is that
function which decides whether anything needs to go
into these sections. */
s->flags |= SEC_EXCLUDE;
continue;
}
if ((s->flags & SEC_HAS_CONTENTS) == 0)
continue;
/* Allocate memory for the section contents. We use bfd_zalloc
here in case unused entries are not reclaimed before the
section's contents are written out. This should not happen,
but this way if it does, we get a R_M32R_NONE reloc instead
of garbage. */
s->contents = bfd_zalloc (dynobj, s->size);
if (s->contents == NULL)
return false;
}
return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs);
}
/* Relocate an M32R/D ELF section.
There is some attempt to make this function usable for many architectures,
both for RELA and REL type relocs, if only to serve as a learning tool.
The RELOCATE_SECTION function is called by the new ELF backend linker
to handle the relocations for a section.
The relocs are always passed as Rela structures; if the section
actually uses Rel structures, the r_addend field will always be
zero.
This function is responsible for adjust the section contents as
necessary, and (if using Rela relocs and generating a
relocatable output file) adjusting the reloc addend as
necessary.
This function does not have to worry about setting the reloc
address or the reloc symbol index.
LOCAL_SYMS is a pointer to the swapped in local symbols.
LOCAL_SECTIONS is an array giving the section in the input file
corresponding to the st_shndx field of each local symbol.
The global hash table entry for the global symbols can be found
via elf_sym_hashes (input_bfd).
When generating relocatable output, this function must handle
STB_LOCAL/STT_SECTION symbols specially. The output symbol is
going to be the section symbol corresponding to the output
section, which means that the addend must be adjusted
accordingly. */
static int
m32r_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
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_tdata (input_bfd)->symtab_hdr;
struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
Elf_Internal_Rela *rel, *relend;
/* Assume success. */
bool ret = true;
struct elf_link_hash_table *htab = m32r_elf_hash_table (info);
bfd_vma *local_got_offsets;
asection *sgot, *splt, *sreloc;
bfd_vma high_address = bfd_get_section_limit (input_bfd, input_section);
if (htab == NULL)
return false;
local_got_offsets = elf_local_got_offsets (input_bfd);
sgot = htab->sgot;
splt = htab->splt;
sreloc = NULL;
rel = relocs;
relend = relocs + input_section->reloc_count;
for (; rel < relend; rel++)
{
int r_type;
reloc_howto_type *howto;
unsigned long r_symndx;
struct elf_link_hash_entry *h;
/* We can't modify r_addend here as elf_link_input_bfd has an assert to
ensure it's zero (we use REL relocs, not RELA). Therefore this
should be assigning zero to `addend', but for clarity we use
`r_addend'. */
bfd_vma addend = rel->r_addend;
bfd_vma offset = rel->r_offset;
bfd_vma relocation;
Elf_Internal_Sym *sym;
asection *sec;
const char *sym_name;
bfd_reloc_status_type r;
const char *errmsg = NULL;
bool use_rel = false;
h = NULL;
r_type = ELF32_R_TYPE (rel->r_info);
if (r_type < 0 || r_type >= (int) R_M32R_max)
{
/* xgettext:c-format */
_bfd_error_handler (_("%pB: unsupported relocation type %#x"),
input_bfd, (int) r_type);
bfd_set_error (bfd_error_bad_value);
ret = false;
continue;
}
if ( r_type == R_M32R_GNU_VTENTRY
|| r_type == R_M32R_GNU_VTINHERIT
|| r_type == R_M32R_NONE
|| r_type == R_M32R_RELA_GNU_VTENTRY
|| r_type == R_M32R_RELA_GNU_VTINHERIT)
continue;
if (r_type <= R_M32R_GNU_VTENTRY)
use_rel = true;
howto = m32r_elf_howto_table + r_type;
r_symndx = ELF32_R_SYM (rel->r_info);
sym = NULL;
sec = NULL;
h = NULL;
if (r_symndx < symtab_hdr->sh_info)
{
/* Local symbol. */
sym = local_syms + r_symndx;
sec = local_sections[r_symndx];
sym_name = "<local symbol>";
if (!use_rel)
{
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
addend = rel->r_addend;
}
else
{
relocation = (sec->output_section->vma
+ sec->output_offset
+ sym->st_value);
}
}
else
{
/* External symbol. */
relocation = 0;
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
if (info->wrap_hash != NULL
&& (input_section->flags & SEC_DEBUGGING) != 0)
h = ((struct elf_link_hash_entry *)
unwrap_hash_lookup (info, input_bfd, &h->root));
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
sym_name = h->root.root.string;
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
bool dyn;
sec = h->root.u.def.section;
dyn = htab->dynamic_sections_created;
sec = h->root.u.def.section;
if (r_type == R_M32R_GOTPC24
|| (r_type == R_M32R_GOTPC_HI_ULO
|| r_type == R_M32R_GOTPC_HI_SLO
|| r_type == R_M32R_GOTPC_LO)
|| (r_type == R_M32R_26_PLTREL
&& h->plt.offset != (bfd_vma) -1)
|| ((r_type == R_M32R_GOT24
|| r_type == R_M32R_GOT16_HI_ULO
|| r_type == R_M32R_GOT16_HI_SLO
|| r_type == R_M32R_GOT16_LO)
&& WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
bfd_link_pic (info),
h)
&& (! bfd_link_pic (info)
|| (! info->symbolic && h->dynindx != -1)
|| !h->def_regular))
|| (bfd_link_pic (info)
&& ((! info->symbolic && h->dynindx != -1)
|| !h->def_regular)
&& (((r_type == R_M32R_16_RELA
|| r_type == R_M32R_32_RELA
|| r_type == R_M32R_24_RELA
|| r_type == R_M32R_HI16_ULO_RELA
|| r_type == R_M32R_HI16_SLO_RELA
|| r_type == R_M32R_LO16_RELA)
&& !h->forced_local)
|| r_type == R_M32R_REL32
|| r_type == R_M32R_10_PCREL_RELA
|| r_type == R_M32R_18_PCREL_RELA
|| r_type == R_M32R_26_PCREL_RELA)
&& ((input_section->flags & SEC_ALLOC) != 0
/* DWARF will emit R_M32R_16(24,32) relocations
in its sections against symbols defined
externally in shared libraries. We can't do
anything with them here. */
|| ((input_section->flags & SEC_DEBUGGING) != 0
&& h->def_dynamic))))
{
/* In these cases, we don't need the relocation
value. We check specially because in some
obscure cases sec->output_section will be NULL. */
}
else if (sec->output_section != NULL)
relocation = (h->root.u.def.value
+ sec->output_section->vma
+ sec->output_offset);
else if (!bfd_link_relocatable (info)
&& (_bfd_elf_section_offset (output_bfd, info,
input_section,
rel->r_offset)
!= (bfd_vma) -1))
{
_bfd_error_handler
/* xgettext:c-format */
(_("%pB(%pA+%#" PRIx64 "): unresolvable %s relocation "
"against symbol `%s'"),
input_bfd,
input_section,
(uint64_t) rel->r_offset,
howto->name,
h->root.root.string);
}
}
else if (h->root.type == bfd_link_hash_undefweak)
;
else if (info->unresolved_syms_in_objects == RM_IGNORE
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
;
else if (!bfd_link_relocatable (info))
info->callbacks->undefined_symbol
(info, h->root.root.string, input_bfd, input_section, offset,
(info->unresolved_syms_in_objects == RM_DIAGNOSE
&& !info->warn_unresolved_syms)
|| ELF_ST_VISIBILITY (h->other));
}
if (sec != NULL && discarded_section (sec))
RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
rel, 1, relend, howto, 0, contents);
if (bfd_link_relocatable (info) && !use_rel)
{
/* This is a relocatable 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 (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
rel->r_addend += sec->output_offset;
continue;
}
if (bfd_link_relocatable (info) && use_rel)
{
/* This is a relocatable 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 (sym == NULL || ELF_ST_TYPE (sym->st_info) != STT_SECTION)
continue;
addend += sec->output_offset;
/* If partial_inplace, we need to store any additional addend
back in the section. */
if (! howto->partial_inplace)
continue;
/* ??? Here is a nice place to call a special_function
like handler. */
if (r_type != R_M32R_HI16_SLO && r_type != R_M32R_HI16_ULO)
r = _bfd_relocate_contents (howto, input_bfd,
addend, contents + offset);
else
{
Elf_Internal_Rela *lorel;
/* We allow an arbitrary number of HI16 relocs before the
LO16 reloc. This permits gcc to emit the HI and LO relocs
itself. */
for (lorel = rel + 1;
(lorel < relend
&& (ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_SLO
|| ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_ULO));
lorel++)
continue;
if (lorel < relend
&& ELF32_R_TYPE (lorel->r_info) == R_M32R_LO16)
{
m32r_elf_relocate_hi16 (input_bfd, r_type, rel, lorel,
contents, addend);
r = bfd_reloc_ok;
}
else
r = _bfd_relocate_contents (howto, input_bfd,
addend, contents + offset);
}
}
else
{
/* Sanity check the address. */
if (offset > high_address)
{
r = bfd_reloc_outofrange;
goto check_reloc;
}
switch ((int) r_type)
{
case R_M32R_GOTOFF:
/* Relocation is relative to the start of the global offset
table (for ld24 rx, #uimm24). eg access at label+addend
ld24 rx. #label@GOTOFF + addend
sub rx, r12. */
BFD_ASSERT (sgot != NULL);
relocation = -(relocation - sgot->output_section->vma);
rel->r_addend = -rel->r_addend;
break;
case R_M32R_GOTOFF_HI_ULO:
case R_M32R_GOTOFF_HI_SLO:
case R_M32R_GOTOFF_LO:
BFD_ASSERT (sgot != NULL);
relocation -= sgot->output_section->vma;
if ((r_type == R_M32R_GOTOFF_HI_SLO)
&& ((relocation + rel->r_addend) & 0x8000))
rel->r_addend += 0x10000;
break;
case R_M32R_GOTPC24:
/* .got(_GLOBAL_OFFSET_TABLE_) - pc relocation
ld24 rx,#_GLOBAL_OFFSET_TABLE_
*/
relocation = sgot->output_section->vma;
break;
case R_M32R_GOTPC_HI_ULO:
case R_M32R_GOTPC_HI_SLO:
case R_M32R_GOTPC_LO:
{
/* .got(_GLOBAL_OFFSET_TABLE_) - pc relocation
bl .+4
seth rx,#high(_GLOBAL_OFFSET_TABLE_)
or3 rx,rx,#low(_GLOBAL_OFFSET_TABLE_ +4)
or
bl .+4
seth rx,#shigh(_GLOBAL_OFFSET_TABLE_)
add3 rx,rx,#low(_GLOBAL_OFFSET_TABLE_ +4)
*/
relocation = sgot->output_section->vma;
relocation -= (input_section->output_section->vma
+ input_section->output_offset
+ rel->r_offset);
if ((r_type == R_M32R_GOTPC_HI_SLO)
&& ((relocation + rel->r_addend) & 0x8000))
rel->r_addend += 0x10000;
break;
}
case R_M32R_GOT16_HI_ULO:
case R_M32R_GOT16_HI_SLO:
case R_M32R_GOT16_LO:
/* Fall through. */
case R_M32R_GOT24:
/* Relocation is to the entry for this symbol in the global
offset table. */
BFD_ASSERT (sgot != NULL);
if (h != NULL)
{
bool dyn;
bfd_vma off;
off = h->got.offset;
BFD_ASSERT (off != (bfd_vma) -1);
dyn = htab->dynamic_sections_created;
if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
bfd_link_pic (info),
h)
|| (bfd_link_pic (info)
&& (info->symbolic
|| h->dynindx == -1
|| h->forced_local)
&& h->def_regular))
{
/* This is actually a static link, or it is a
-Bsymbolic link and the symbol is defined
locally, or the symbol was forced to be local
because of a version file. We must initialize
this entry in the global offset table. Since the
offset must always be a multiple of 4, we use the
least significant bit to record whether we have
initialized it already.
When doing a dynamic link, we create a .rela.got
relocation entry to initialize the value. This
is done in the finish_dynamic_symbol routine. */
if ((off & 1) != 0)
off &= ~1;
else
{
bfd_put_32 (output_bfd, relocation,
sgot->contents + off);
h->got.offset |= 1;
}
}
relocation = sgot->output_offset + off;
}
else
{
bfd_vma off;
bfd_byte *loc;
BFD_ASSERT (local_got_offsets != NULL
&& local_got_offsets[r_symndx] != (bfd_vma) -1);
off = local_got_offsets[r_symndx];
/* The offset must always be a multiple of 4. We use
the least significant bit to record whether we have
already processed this entry. */
if ((off & 1) != 0)
off &= ~1;
else
{
bfd_put_32 (output_bfd, relocation, sgot->contents + off);
if (bfd_link_pic (info))
{
asection *srelgot;
Elf_Internal_Rela outrel;
/* We need to generate a R_M32R_RELATIVE reloc
for the dynamic linker. */
srelgot = htab->srelgot;
BFD_ASSERT (srelgot != NULL);
outrel.r_offset = (sgot->output_section->vma
+ sgot->output_offset
+ off);
outrel.r_info = ELF32_R_INFO (0, R_M32R_RELATIVE);
outrel.r_addend = relocation;
loc = srelgot->contents;
loc += srelgot->reloc_count * sizeof (Elf32_External_Rela);
bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
++srelgot->reloc_count;
}
local_got_offsets[r_symndx] |= 1;
}
relocation = sgot->output_offset + off;
}
if ((r_type == R_M32R_GOT16_HI_SLO)
&& ((relocation + rel->r_addend) & 0x8000))
rel->r_addend += 0x10000;
break;
case R_M32R_26_PLTREL:
/* Relocation is to the entry for this symbol in the
procedure linkage table. */
/* The native assembler will generate a 26_PLTREL reloc
for a local symbol if you assemble a call from one
section to another when using -K pic. */
if (h == NULL)
break;
if (h->forced_local)
break;
if (h->plt.offset == (bfd_vma) -1)
/* We didn't make a PLT entry for this symbol. This
happens when statically linking PIC code, or when
using -Bsymbolic. */
break;
relocation = (splt->output_section->vma
+ splt->output_offset
+ h->plt.offset);
break;
case R_M32R_HI16_SLO_RELA:
if ((relocation + rel->r_addend) & 0x8000)
rel->r_addend += 0x10000;
/* Fall through. */
case R_M32R_16_RELA:
case R_M32R_24_RELA:
case R_M32R_32_RELA:
case R_M32R_REL32:
case R_M32R_10_PCREL_RELA:
case R_M32R_18_PCREL_RELA:
case R_M32R_26_PCREL_RELA:
case R_M32R_HI16_ULO_RELA:
case R_M32R_LO16_RELA:
if (bfd_link_pic (info)
&& r_symndx != STN_UNDEF
&& (input_section->flags & SEC_ALLOC) != 0
&& (( r_type != R_M32R_10_PCREL_RELA
&& r_type != R_M32R_18_PCREL_RELA
&& r_type != R_M32R_26_PCREL_RELA
&& r_type != R_M32R_REL32)
|| (h != NULL
&& h->dynindx != -1
&& (! info->symbolic
|| !h->def_regular))))
{
Elf_Internal_Rela outrel;
bool skip, relocate;
bfd_byte *loc;
/* When generating a shared object, these relocations
are copied into the output file to be resolved at run
time. */
if (sreloc == NULL)
{
sreloc = _bfd_elf_get_dynamic_reloc_section
(input_bfd, input_section, /*rela?*/ true);
if (sreloc == NULL)
return false;
}
skip = false;
relocate = false;
outrel.r_offset = _bfd_elf_section_offset (output_bfd,
info,
input_section,
rel->r_offset);
if (outrel.r_offset == (bfd_vma) -1)
skip = true;
else if (outrel.r_offset == (bfd_vma) -2)
skip = relocate = true;
outrel.r_offset += (input_section->output_section->vma
+ input_section->output_offset);
if (skip)
memset (&outrel, 0, sizeof outrel);
else if ( r_type == R_M32R_10_PCREL_RELA
|| r_type == R_M32R_18_PCREL_RELA
|| r_type == R_M32R_26_PCREL_RELA
|| r_type == R_M32R_REL32)
{
BFD_ASSERT (h != NULL && h->dynindx != -1);
outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
outrel.r_addend = rel->r_addend;
}
else
{
/* h->dynindx may be -1 if this symbol was marked to
become local. */
if (h == NULL
|| ((info->symbolic || h->dynindx == -1)
&& h->def_regular))
{
relocate = true;
outrel.r_info = ELF32_R_INFO (0, R_M32R_RELATIVE);
outrel.r_addend = relocation + rel->r_addend;
}
else
{
BFD_ASSERT (h->dynindx != -1);
outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
outrel.r_addend = relocation + rel->r_addend;
}
}
loc = sreloc->contents;
loc += sreloc->reloc_count * sizeof (Elf32_External_Rela);
bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
++sreloc->reloc_count;
/* If this reloc is against an external symbol, we do
not want to fiddle with the addend. Otherwise, we
need to include the symbol value so that it becomes
an addend for the dynamic reloc. */
if (! relocate)
continue;
break;
}
else if (r_type != R_M32R_10_PCREL_RELA)
break;
/* Fall through. */
case (int) R_M32R_10_PCREL :
r = m32r_elf_do_10_pcrel_reloc (input_bfd, howto, input_section,
contents, offset,
sec, relocation, addend);
goto check_reloc;
case (int) R_M32R_HI16_SLO :
case (int) R_M32R_HI16_ULO :
{
Elf_Internal_Rela *lorel;
/* We allow an arbitrary number of HI16 relocs before the
LO16 reloc. This permits gcc to emit the HI and LO relocs
itself. */
for (lorel = rel + 1;
(lorel < relend
&& (ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_SLO
|| ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_ULO));
lorel++)
continue;
if (lorel < relend
&& ELF32_R_TYPE (lorel->r_info) == R_M32R_LO16)
{
m32r_elf_relocate_hi16 (input_bfd, r_type, rel, lorel,
contents, relocation + addend);
r = bfd_reloc_ok;
}
else
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
contents, offset,
relocation, addend);
}
goto check_reloc;
case (int) R_M32R_SDA16_RELA:
case (int) R_M32R_SDA16 :
{
const char *name;
BFD_ASSERT (sec != NULL);
name = bfd_section_name (sec);
if ( strcmp (name, ".sdata") == 0
|| strcmp (name, ".sbss") == 0
|| strcmp (name, ".scommon") == 0)
{
bfd_vma sda_base;
bfd *out_bfd = sec->output_section->owner;
r = m32r_elf_final_sda_base (out_bfd, info,
&errmsg,
&sda_base);
if (r != bfd_reloc_ok)
{
ret = false;
goto check_reloc;
}
/* At this point `relocation' contains the object's
address. */
relocation -= sda_base;
/* Now it contains the offset from _SDA_BASE_. */
}
else
{
_bfd_error_handler
/* xgettext:c-format */
(_("%pB: the target (%s) of an %s relocation"
" is in the wrong section (%pA)"),
input_bfd,
sym_name,
m32r_elf_howto_table[(int) r_type].name,
sec);
/*bfd_set_error (bfd_error_bad_value); ??? why? */
ret = false;
continue;
}
}
/* Fall through. */
default : /* OLD_M32R_RELOC */
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
contents, offset,
relocation, addend);
goto check_reloc;
}
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
contents, rel->r_offset,
relocation, rel->r_addend);
}
check_reloc:
if (r != bfd_reloc_ok)
{
/* FIXME: This should be generic enough to go in a utility. */
const char *name;
if (h != NULL)
name = h->root.root.string;
else
{
name = (bfd_elf_string_from_elf_section
(input_bfd, symtab_hdr->sh_link, sym->st_name));
if (name == NULL || *name == '\0')
name = bfd_section_name (sec);
}
if (errmsg != NULL)
goto common_error;
switch (r)
{
case bfd_reloc_overflow:
(*info->callbacks->reloc_overflow)
(info, (h ? &h->root : NULL), name, howto->name,
(bfd_vma) 0, input_bfd, input_section, offset);
break;
case bfd_reloc_undefined:
(*info->callbacks->undefined_symbol)
(info, name, input_bfd, input_section, offset, true);
break;
case bfd_reloc_outofrange:
errmsg = _("internal error: out of range error");
goto common_error;
case bfd_reloc_notsupported:
errmsg = _("internal error: unsupported relocation error");
goto common_error;
case bfd_reloc_dangerous:
errmsg = _("internal error: dangerous error");
goto common_error;
default:
errmsg = _("internal error: unknown error");
/* fall through */
common_error:
(*info->callbacks->warning) (info, errmsg, name, input_bfd,
input_section, offset);
break;
}
}
}
return ret;
}
/* Finish up dynamic symbol handling. We set the contents of various
dynamic sections here. */
static bool
m32r_elf_finish_dynamic_symbol (bfd *output_bfd,
struct bfd_link_info *info,
struct elf_link_hash_entry *h,
Elf_Internal_Sym *sym)
{
struct elf_link_hash_table *htab;
bfd_byte *loc;
#ifdef DEBUG_PIC
printf ("m32r_elf_finish_dynamic_symbol()\n");
#endif
htab = m32r_elf_hash_table (info);
if (htab == NULL)
return false;
if (h->plt.offset != (bfd_vma) -1)
{
asection *splt;
asection *sgot;
asection *srela;
bfd_vma plt_index;
bfd_vma got_offset;
Elf_Internal_Rela rela;
/* This symbol has an entry in the procedure linkage table. Set
it up. */
BFD_ASSERT (h->dynindx != -1);
splt = htab->splt;
sgot = htab->sgotplt;
srela = htab->srelplt;
BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
/* Get the index in the procedure linkage table which
corresponds to this symbol. This is the index of this symbol
in all the symbols for which we are making plt entries. The
first entry in the procedure linkage table is reserved. */
plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
/* Get the offset into the .got table of the entry that
corresponds to this function. Each .got entry is 4 bytes.
The first three are reserved. */
got_offset = (plt_index + 3) * 4;
/* Fill in the entry in the procedure linkage table. */
if (! bfd_link_pic (info))
{
bfd_put_32 (output_bfd,
(PLT_ENTRY_WORD0b
+ (((sgot->output_section->vma
+ sgot->output_offset
+ got_offset) >> 16) & 0xffff)),
splt->contents + h->plt.offset);
bfd_put_32 (output_bfd,
(PLT_ENTRY_WORD1b
+ ((sgot->output_section->vma
+ sgot->output_offset
+ got_offset) & 0xffff)),
splt->contents + h->plt.offset + 4);
bfd_put_32 (output_bfd, PLT_ENTRY_WORD2,
splt->contents + h->plt.offset + 8);
bfd_put_32 (output_bfd,
(PLT_ENTRY_WORD3
+ plt_index * sizeof (Elf32_External_Rela)),
splt->contents + h->plt.offset + 12);
bfd_put_32 (output_bfd,
(PLT_ENTRY_WORD4
+ (((unsigned int) ((- (h->plt.offset + 16)) >> 2)) & 0xffffff)),
splt->contents + h->plt.offset + 16);
}
else
{
bfd_put_32 (output_bfd,
PLT_ENTRY_WORD0 + got_offset,
splt->contents + h->plt.offset);
bfd_put_32 (output_bfd, PLT_ENTRY_WORD1,
splt->contents + h->plt.offset + 4);
bfd_put_32 (output_bfd, PLT_ENTRY_WORD2,
splt->contents + h->plt.offset + 8);
bfd_put_32 (output_bfd,
(PLT_ENTRY_WORD3
+ plt_index * sizeof (Elf32_External_Rela)),
splt->contents + h->plt.offset + 12);
bfd_put_32 (output_bfd,
(PLT_ENTRY_WORD4
+ (((unsigned int) ((- (h->plt.offset + 16)) >> 2)) & 0xffffff)),
splt->contents + h->plt.offset + 16);
}
/* Fill in the entry in the global offset table. */
bfd_put_32 (output_bfd,
(splt->output_section->vma
+ splt->output_offset
+ h->plt.offset
+ 12), /* same offset */
sgot->contents + got_offset);
/* Fill in the entry in the .rela.plt section. */
rela.r_offset = (sgot->output_section->vma
+ sgot->output_offset
+ got_offset);
rela.r_info = ELF32_R_INFO (h->dynindx, R_M32R_JMP_SLOT);
rela.r_addend = 0;
loc = srela->contents;
loc += plt_index * sizeof (Elf32_External_Rela);
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
if (!h->def_regular)
{
/* Mark the symbol as undefined, rather than as defined in
the .plt section. Leave the value alone. */
sym->st_shndx = SHN_UNDEF;
}
}
if (h->got.offset != (bfd_vma) -1)
{
asection *sgot;
asection *srela;
Elf_Internal_Rela rela;
/* This symbol has an entry in the global offset table. Set it
up. */
sgot = htab->sgot;
srela = htab->srelgot;
BFD_ASSERT (sgot != NULL && srela != NULL);
rela.r_offset = (sgot->output_section->vma
+ sgot->output_offset
+ (h->got.offset &~ 1));
/* If this is a -Bsymbolic link, and the symbol is defined
locally, we just want to emit a RELATIVE reloc. Likewise if
the symbol was forced to be local because of a version file.
The entry in the global offset table will already have been
initialized in the relocate_section function. */
if (bfd_link_pic (info)
&& (info->symbolic
|| h->dynindx == -1
|| h->forced_local)
&& h->def_regular)
{
rela.r_info = ELF32_R_INFO (0, R_M32R_RELATIVE);
rela.r_addend = (h->root.u.def.value
+ h->root.u.def.section->output_section->vma
+ h->root.u.def.section->output_offset);
}
else
{
BFD_ASSERT ((h->got.offset & 1) == 0);
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
rela.r_info = ELF32_R_INFO (h->dynindx, R_M32R_GLOB_DAT);
rela.r_addend = 0;
}
loc = srela->contents;
loc += srela->reloc_count * sizeof (Elf32_External_Rela);
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
++srela->reloc_count;
}
if (h->needs_copy)
{
asection *s;
Elf_Internal_Rela rela;
/* This symbols needs a copy reloc. Set it up. */
BFD_ASSERT (h->dynindx != -1
&& (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak));
s = bfd_get_linker_section (htab->dynobj, ".rela.bss");
BFD_ASSERT (s != NULL);
rela.r_offset = (h->root.u.def.value
+ h->root.u.def.section->output_section->vma
+ h->root.u.def.section->output_offset);
rela.r_info = ELF32_R_INFO (h->dynindx, R_M32R_COPY);
rela.r_addend = 0;
loc = s->contents;
loc += s->reloc_count * sizeof (Elf32_External_Rela);
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
++s->reloc_count;
}
/* Mark some specially defined symbols as absolute. */
if (h == htab->hdynamic || h == htab->hgot)
sym->st_shndx = SHN_ABS;
return true;
}
/* Finish up the dynamic sections. */
static bool
m32r_elf_finish_dynamic_sections (bfd *output_bfd,
struct bfd_link_info *info)
{
struct elf_link_hash_table *htab;
bfd *dynobj;
asection *sdyn;
asection *sgot;
#ifdef DEBUG_PIC
printf ("m32r_elf_finish_dynamic_sections()\n");
#endif
htab = m32r_elf_hash_table (info);
if (htab == NULL)
return false;
dynobj = htab->dynobj;
sgot = htab->sgotplt;
sdyn = bfd_get_linker_section (dynobj, ".dynamic");
if (htab->dynamic_sections_created)
{
asection *splt;
Elf32_External_Dyn *dyncon, *dynconend;
BFD_ASSERT (sgot != NULL && sdyn != NULL);
dyncon = (Elf32_External_Dyn *) sdyn->contents;
dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
for (; dyncon < dynconend; dyncon++)
{
Elf_Internal_Dyn dyn;
asection *s;
bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
switch (dyn.d_tag)
{
default:
break;
case DT_PLTGOT:
s = htab->sgotplt;
goto get_vma;
case DT_JMPREL:
s = htab->srelplt;
get_vma:
dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
break;
case DT_PLTRELSZ:
s = htab->srelplt;
dyn.d_un.d_val = s->size;
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
break;
}
}
/* Fill in the first entry in the procedure linkage table. */
splt = htab->splt;
if (splt && splt->size > 0)
{
if (bfd_link_pic (info))
{
bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0, splt->contents);
bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1, splt->contents + 4);
bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2, splt->contents + 8);
bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3, splt->contents + 12);
bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4, splt->contents + 16);
}
else
{
unsigned long addr;
/* addr = .got + 4 */
addr = sgot->output_section->vma + sgot->output_offset + 4;
bfd_put_32 (output_bfd,
PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff),
splt->contents);
bfd_put_32 (output_bfd,
PLT0_ENTRY_WORD1 | (addr & 0xffff),
splt->contents + 4);
bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8);
bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12);
bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16);
}
elf_section_data (splt->output_section)->this_hdr.sh_entsize =
PLT_ENTRY_SIZE;
}
}
/* Fill in the first three entries in the global offset table. */
if (sgot && sgot->size > 0)
{
if (sdyn == NULL)
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
else
bfd_put_32 (output_bfd,
sdyn->output_section->vma + sdyn->output_offset,
sgot->contents);
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
}
return true;
}
/* Set the right machine number. */
static bool
m32r_elf_object_p (bfd *abfd)
{
switch (elf_elfheader (abfd)->e_flags & EF_M32R_ARCH)
{
default:
case E_M32R_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32r); break;
case E_M32RX_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32rx); break;
case E_M32R2_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32r2); break;
}
return true;
}
/* Store the machine number in the flags field. */
static bool
m32r_elf_final_write_processing (bfd *abfd)
{
unsigned long val;
switch (bfd_get_mach (abfd))
{
default:
case bfd_mach_m32r: val = E_M32R_ARCH; break;
case bfd_mach_m32rx: val = E_M32RX_ARCH; break;
case bfd_mach_m32r2: val = E_M32R2_ARCH; break;
}
elf_elfheader (abfd)->e_flags &=~ EF_M32R_ARCH;
elf_elfheader (abfd)->e_flags |= val;
return _bfd_elf_final_write_processing (abfd);
}
/* Function to keep M32R specific file flags. */
static bool
m32r_elf_set_private_flags (bfd *abfd, flagword flags)
{
BFD_ASSERT (!elf_flags_init (abfd)
|| elf_elfheader (abfd)->e_flags == flags);
elf_elfheader (abfd)->e_flags = flags;
elf_flags_init (abfd) = true;
return true;
}
/* Merge backend specific data from an object file to the output
object file when linking. */
static bool
m32r_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
{
bfd *obfd = info->output_bfd;
flagword out_flags;
flagword in_flags;
if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
return true;
in_flags = elf_elfheader (ibfd)->e_flags;
out_flags = elf_elfheader (obfd)->e_flags;
if (! elf_flags_init (obfd))
{
/* If the input is the default architecture then do not
bother setting the flags for the output architecture,
instead allow future merges to do this. If no future
merges ever set these flags then they will retain their
unitialised values, which surprise surprise, correspond
to the default values. */
if (bfd_get_arch_info (ibfd)->the_default)
return true;
elf_flags_init (obfd) = true;
elf_elfheader (obfd)->e_flags = in_flags;
if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
&& bfd_get_arch_info (obfd)->the_default)
return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
bfd_get_mach (ibfd));
return true;
}
/* Check flag compatibility. */
if (in_flags == out_flags)
return true;
if ((in_flags & EF_M32R_ARCH) != (out_flags & EF_M32R_ARCH))
{
if ( ((in_flags & EF_M32R_ARCH) != E_M32R_ARCH)
|| ((out_flags & EF_M32R_ARCH) == E_M32R_ARCH)
|| ((in_flags & EF_M32R_ARCH) == E_M32R2_ARCH))
{
_bfd_error_handler
(_("%pB: instruction set mismatch with previous modules"), ibfd);
bfd_set_error (bfd_error_bad_value);
return false;
}
}
return true;
}
/* Display the flags field. */
static bool
m32r_elf_print_private_bfd_data (bfd *abfd, void * ptr)
{
FILE * file = (FILE *) ptr;
BFD_ASSERT (abfd != NULL && ptr != NULL);
_bfd_elf_print_private_bfd_data (abfd, ptr);
fprintf (file, _("private flags = %lx"), elf_elfheader (abfd)->e_flags);
switch (elf_elfheader (abfd)->e_flags & EF_M32R_ARCH)
{
default:
case E_M32R_ARCH: fprintf (file, _(": m32r instructions")); break;
case E_M32RX_ARCH: fprintf (file, _(": m32rx instructions")); break;
case E_M32R2_ARCH: fprintf (file, _(": m32r2 instructions")); break;
}
fputc ('\n', file);
return true;
}
static asection *
m32r_elf_gc_mark_hook (asection *sec,
struct bfd_link_info *info,
Elf_Internal_Rela *rel,
struct elf_link_hash_entry *h,
Elf_Internal_Sym *sym)
{
if (h != NULL)
switch (ELF32_R_TYPE (rel->r_info))
{
case R_M32R_GNU_VTINHERIT:
case R_M32R_GNU_VTENTRY:
case R_M32R_RELA_GNU_VTINHERIT:
case R_M32R_RELA_GNU_VTENTRY:
return NULL;
}
return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
}
/* Look through the relocs for a section during the first phase.
Since we don't do .gots or .plts, we just need to consider the
virtual table relocs for gc. */
static bool
m32r_elf_check_relocs (bfd *abfd,
struct bfd_link_info *info,
asection *sec,
const Elf_Internal_Rela *relocs)
{
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
const Elf_Internal_Rela *rel;
const Elf_Internal_Rela *rel_end;
struct elf_link_hash_table *htab;
bfd *dynobj;
asection *sreloc;
if (bfd_link_relocatable (info))
return true;
sreloc = NULL;
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (abfd);
htab = m32r_elf_hash_table (info);
if (htab == NULL)
return false;
dynobj = htab->dynobj;
rel_end = relocs + sec->reloc_count;
for (rel = relocs; rel < rel_end; rel++)
{
int r_type;
struct elf_link_hash_entry *h;
unsigned long r_symndx;
r_symndx = ELF32_R_SYM (rel->r_info);
r_type = ELF32_R_TYPE (rel->r_info);
if (r_symndx < symtab_hdr->sh_info)
h = NULL;
else
{
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
}
/* Some relocs require a global offset table. */
if (htab->sgot == NULL)
{
switch (r_type)
{
case R_M32R_GOT16_HI_ULO:
case R_M32R_GOT16_HI_SLO:
case R_M32R_GOTOFF:
case R_M32R_GOTOFF_HI_ULO:
case R_M32R_GOTOFF_HI_SLO:
case R_M32R_GOTOFF_LO:
case R_M32R_GOT16_LO:
case R_M32R_GOTPC24:
case R_M32R_GOTPC_HI_ULO:
case R_M32R_GOTPC_HI_SLO:
case R_M32R_GOTPC_LO:
case R_M32R_GOT24:
if (dynobj == NULL)
htab->dynobj = dynobj = abfd;
if (!_bfd_elf_create_got_section (dynobj, info))
return false;
break;
default:
break;
}
}
switch (r_type)
{
case R_M32R_GOT16_HI_ULO:
case R_M32R_GOT16_HI_SLO:
case R_M32R_GOT16_LO:
case R_M32R_GOT24:
if (h != NULL)
h->got.refcount += 1;
else
{
bfd_signed_vma *local_got_refcounts;
/* This is a global offset table entry for a local
symbol. */
local_got_refcounts = elf_local_got_refcounts (abfd);
if (local_got_refcounts == NULL)
{
bfd_size_type size;
size = symtab_hdr->sh_info;
size *= sizeof (bfd_signed_vma);
local_got_refcounts = bfd_zalloc (abfd, size);
if (local_got_refcounts == NULL)
return false;
elf_local_got_refcounts (abfd) = local_got_refcounts;
}
local_got_refcounts[r_symndx] += 1;
}
break;
case R_M32R_26_PLTREL:
/* This symbol requires a procedure linkage table entry. We
actually build the entry in adjust_dynamic_symbol,
because this might be a case of linking PIC code without
linking in any dynamic objects, in which case we don't
need to generate a procedure linkage table after all. */
/* If this is a local symbol, we resolve it directly without
creating a procedure linkage table entry. */
if (h == NULL)
continue;
if (h->forced_local)
break;
h->needs_plt = 1;
h->plt.refcount += 1;
break;
case R_M32R_16_RELA:
case R_M32R_24_RELA:
case R_M32R_32_RELA:
case R_M32R_REL32:
case R_M32R_HI16_ULO_RELA:
case R_M32R_HI16_SLO_RELA:
case R_M32R_LO16_RELA:
case R_M32R_SDA16_RELA:
case R_M32R_10_PCREL_RELA:
case R_M32R_18_PCREL_RELA:
case R_M32R_26_PCREL_RELA:
if (h != NULL && !bfd_link_pic (info))
{
h->non_got_ref = 1;
h->plt.refcount += 1;
}
/* If we are creating a shared library, and this is a reloc
against a global symbol, or a non PC relative reloc
against a local symbol, then we need to copy the reloc
into the shared library. However, if we are linking with
-Bsymbolic, we do not need to copy a reloc against a
global symbol which is defined in an object we are
including in the link (i.e., DEF_REGULAR is set). At
this point we have not seen all the input files, so it is
possible that DEF_REGULAR is not set now but will be set
later (it is never cleared). We account for that
possibility below by storing information in the
dyn_relocs field of the hash table entry. A similar
situation occurs when creating shared libraries and symbol
visibility changes render the symbol local.
If on the other hand, we are creating an executable, we
may need to keep relocations for symbols satisfied by a
dynamic library if we manage to avoid copy relocs for the
symbol. */
if ((bfd_link_pic (info)
&& (sec->flags & SEC_ALLOC) != 0
&& (( r_type != R_M32R_26_PCREL_RELA
&& r_type != R_M32R_18_PCREL_RELA
&& r_type != R_M32R_10_PCREL_RELA
&& r_type != R_M32R_REL32)
|| (h != NULL
&& (! info->symbolic
|| h->root.type == bfd_link_hash_defweak
|| !h->def_regular))))
|| (!bfd_link_pic (info)
&& (sec->flags & SEC_ALLOC) != 0
&& h != NULL
&& (h->root.type == bfd_link_hash_defweak
|| !h->def_regular)))
{
struct elf_dyn_relocs *p;
struct elf_dyn_relocs **head;
if (dynobj == NULL)
htab->dynobj = dynobj = abfd;
/* When creating a shared object, we must copy these
relocs into the output file. We create a reloc
section in dynobj and make room for the reloc. */
if (sreloc == NULL)
{
sreloc = _bfd_elf_make_dynamic_reloc_section
(sec, dynobj, 2, abfd, /*rela?*/ true);
if (sreloc == NULL)
return false;
}
/* If this is a global symbol, we count the number of
relocations we need for this symbol. */
if (h != NULL)
head = &h->dyn_relocs;
else
{
/* Track dynamic relocs needed for local syms too. */
asection *s;
void *vpp;
Elf_Internal_Sym *isym;
isym = bfd_sym_from_r_symndx (&htab->sym_cache,
abfd, r_symndx);
if (isym == NULL)
return false;
s = bfd_section_from_elf_index (abfd, isym->st_shndx);
if (s == NULL)
s = sec;
vpp = &elf_section_data (s)->local_dynrel;
head = (struct elf_dyn_relocs **) vpp;
}
p = *head;
if (p == NULL || p->sec != sec)
{
size_t amt = sizeof (*p);
p = bfd_alloc (dynobj, amt);
if (p == NULL)
return false;
p->next = *head;
*head = p;
p->sec = sec;
p->count = 0;
p->pc_count = 0;
}
p->count += 1;
if ( ELF32_R_TYPE (rel->r_info) == R_M32R_26_PCREL_RELA
|| ELF32_R_TYPE (rel->r_info) == R_M32R_18_PCREL_RELA
|| ELF32_R_TYPE (rel->r_info) == R_M32R_10_PCREL_RELA
|| ELF32_R_TYPE (rel->r_info) == R_M32R_REL32)
p->pc_count += 1;
}
break;
/* This relocation describes the C++ object vtable hierarchy.
Reconstruct it for later use during GC. */
case R_M32R_RELA_GNU_VTINHERIT:
case R_M32R_GNU_VTINHERIT:
if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
return false;
break;
/* This relocation describes which C++ vtable entries are actually
used. Record for later use during GC. */
case R_M32R_GNU_VTENTRY:
if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
return false;
break;
case R_M32R_RELA_GNU_VTENTRY:
if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
return false;
break;
}
}
return true;
}
static const struct bfd_elf_special_section m32r_elf_special_sections[] =
{
{ STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
{ STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
{ NULL, 0, 0, 0, 0 }
};
static bool
m32r_elf_section_flags (const Elf_Internal_Shdr *hdr)
{
const char *name = hdr->bfd_section->name;
if (startswith (name, ".sbss")
|| startswith (name, ".sdata"))
hdr->bfd_section->flags |= SEC_SMALL_DATA;
return true;
}
static enum elf_reloc_type_class
m32r_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
const asection *rel_sec ATTRIBUTE_UNUSED,
const Elf_Internal_Rela *rela)
{
switch ((int) ELF32_R_TYPE (rela->r_info))
{
case R_M32R_RELATIVE: return reloc_class_relative;
case R_M32R_JMP_SLOT: return reloc_class_plt;
case R_M32R_COPY: return reloc_class_copy;
default: return reloc_class_normal;
}
}
#define ELF_ARCH bfd_arch_m32r
#define ELF_TARGET_ID M32R_ELF_DATA
#define ELF_MACHINE_CODE EM_M32R
#define ELF_MACHINE_ALT1 EM_CYGNUS_M32R
#define ELF_MAXPAGESIZE 0x1 /* Explicitly requested by Mitsubishi. */
#define TARGET_BIG_SYM m32r_elf32_vec
#define TARGET_BIG_NAME "elf32-m32r"
#define TARGET_LITTLE_SYM m32r_elf32_le_vec
#define TARGET_LITTLE_NAME "elf32-m32rle"
#define elf_info_to_howto m32r_info_to_howto
#define elf_info_to_howto_rel m32r_info_to_howto_rel
#define elf_backend_section_from_bfd_section _bfd_m32r_elf_section_from_bfd_section
#define elf_backend_symbol_processing _bfd_m32r_elf_symbol_processing
#define elf_backend_add_symbol_hook m32r_elf_add_symbol_hook
#define elf_backend_relocate_section m32r_elf_relocate_section
#define elf_backend_gc_mark_hook m32r_elf_gc_mark_hook
#define elf_backend_check_relocs m32r_elf_check_relocs
#define elf_backend_create_dynamic_sections m32r_elf_create_dynamic_sections
#define bfd_elf32_bfd_link_hash_table_create m32r_elf_link_hash_table_create
#define elf_backend_size_dynamic_sections m32r_elf_size_dynamic_sections
#define elf_backend_omit_section_dynsym _bfd_elf_omit_section_dynsym_all
#define elf_backend_finish_dynamic_sections m32r_elf_finish_dynamic_sections
#define elf_backend_adjust_dynamic_symbol m32r_elf_adjust_dynamic_symbol
#define elf_backend_finish_dynamic_symbol m32r_elf_finish_dynamic_symbol
#define elf_backend_reloc_type_class m32r_elf_reloc_type_class
#define elf_backend_can_gc_sections 1
/*#if !USE_REL
#define elf_backend_rela_normal 1
#endif*/
#define elf_backend_can_refcount 1
#define elf_backend_want_got_plt 1
#define elf_backend_plt_readonly 1
#define elf_backend_want_plt_sym 0
#define elf_backend_got_header_size 12
#define elf_backend_dtrel_excludes_plt 1
#define elf_backend_may_use_rel_p 1
#ifdef USE_M32R_OLD_RELOC
#define elf_backend_default_use_rela_p 0
#define elf_backend_may_use_rela_p 0
#else
#define elf_backend_default_use_rela_p 1
#define elf_backend_may_use_rela_p 1
#endif
#define elf_backend_object_p m32r_elf_object_p
#define elf_backend_final_write_processing m32r_elf_final_write_processing
#define bfd_elf32_bfd_merge_private_bfd_data m32r_elf_merge_private_bfd_data
#define bfd_elf32_bfd_set_private_flags m32r_elf_set_private_flags
#define bfd_elf32_bfd_print_private_bfd_data m32r_elf_print_private_bfd_data
#define elf_backend_special_sections m32r_elf_special_sections
#define elf_backend_section_flags m32r_elf_section_flags
#define elf_backend_linux_prpsinfo32_ugid16 true
#include "elf32-target.h"
#undef ELF_MAXPAGESIZE
#define ELF_MAXPAGESIZE 0x1000
#undef TARGET_BIG_SYM
#define TARGET_BIG_SYM m32r_elf32_linux_vec
#undef TARGET_BIG_NAME
#define TARGET_BIG_NAME "elf32-m32r-linux"
#undef TARGET_LITTLE_SYM
#define TARGET_LITTLE_SYM m32r_elf32_linux_le_vec
#undef TARGET_LITTLE_NAME
#define TARGET_LITTLE_NAME "elf32-m32rle-linux"
#undef elf32_bed
#define elf32_bed elf32_m32r_lin_bed
#include "elf32-target.h"