blob: 7034c3d3fd3ddffed0dcdd4af9c19f37e3210883 [file] [log] [blame]
/* M32R-specific support for 32-bit ELF.
Copyright (C) 1996-2016 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 void
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)
{
_bfd_error_handler (_("%B: invalid M32R reloc number: %d"), abfd, r_type);
r_type = 0;
}
cache_ptr->howto = &m32r_elf_howto_table[r_type];
}
static void
m32r_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
arelent *cache_ptr,
Elf_Internal_Rela *dst)
{
BFD_ASSERT ((ELF32_R_TYPE(dst->r_info) == (unsigned int) R_M32R_NONE)
|| ((ELF32_R_TYPE(dst->r_info) > (unsigned int) R_M32R_GNU_VTENTRY)
&& (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_M32R_max)));
cache_ptr->howto = &m32r_elf_howto_table[ELF32_R_TYPE(dst->r_info)];
}
/* Given a BFD section, try to locate the corresponding ELF section
index. */
static bfd_boolean
_bfd_m32r_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
asection *sec,
int *retval)
{
if (strcmp (bfd_get_section_name (abfd, 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 asymbol m32r_elf_scom_symbol;
static asymbol *m32r_elf_scom_symbol_ptr;
/* 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:
if (m32r_elf_scom_section.name == NULL)
{
/* Initialize the small common section. */
m32r_elf_scom_section.name = ".scommon";
m32r_elf_scom_section.flags = SEC_IS_COMMON;
m32r_elf_scom_section.output_section = &m32r_elf_scom_section;
m32r_elf_scom_section.symbol = &m32r_elf_scom_symbol;
m32r_elf_scom_section.symbol_ptr_ptr = &m32r_elf_scom_symbol_ptr;
m32r_elf_scom_symbol.name = ".scommon";
m32r_elf_scom_symbol.flags = BSF_SECTION_SYM;
m32r_elf_scom_symbol.section = &m32r_elf_scom_section;
m32r_elf_scom_symbol_ptr = &m32r_elf_scom_symbol;
}
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 bfd_boolean
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 (abfd, 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;
*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;
};
/* The sh linker needs to keep track of the number of relocs that it
decides to copy as dynamic relocs in check_relocs for each symbol.
This is so that it can later discard them if they are found to be
unnecessary. We store the information in a field extending the
regular ELF linker hash table. */
struct elf_m32r_dyn_relocs
{
struct elf_m32r_dyn_relocs *next;
/* The input section of the reloc. */
asection *sec;
/* Total number of relocs copied for the input section. */
bfd_size_type count;
/* Number of pc-relative relocs copied for the input section. */
bfd_size_type pc_count;
};
/* m32r ELF linker hash entry. */
struct elf_m32r_link_hash_entry
{
struct elf_link_hash_entry root;
/* Track dynamic relocs copied for this symbol. */
struct elf_m32r_dyn_relocs *dyn_relocs;
};
/* m32r ELF linker hash table. */
struct elf_m32r_link_hash_table
{
struct elf_link_hash_table root;
/* Short-cuts to get to dynamic linker sections. */
asection *sgot;
asection *sgotplt;
asection *srelgot;
asection *splt;
asection *srelplt;
asection *sdynbss;
asection *srelbss;
/* Small local sym cache. */
struct sym_cache sym_cache;
};
/* Traverse an m32r ELF linker hash table. */
#define m32r_elf_link_hash_traverse(table, func, info) \
(elf_link_hash_traverse \
(&(table)->root, \
(bfd_boolean (*) (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) \
(elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
== M32R_ELF_DATA ? ((struct elf_m32r_link_hash_table *) ((p)->hash)) : NULL)
/* Create an entry in an m32r ELF linker hash table. */
static struct bfd_hash_entry *
m32r_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
struct bfd_hash_table *table,
const char *string)
{
struct elf_m32r_link_hash_entry *ret =
(struct elf_m32r_link_hash_entry *) entry;
/* Allocate the structure if it has not already been allocated by a
subclass. */
if (ret == NULL)
ret = bfd_hash_allocate (table,
sizeof (struct elf_m32r_link_hash_entry));
if (ret == NULL)
return NULL;
/* Call the allocation method of the superclass. */
ret = ((struct elf_m32r_link_hash_entry *)
_bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
table, string));
if (ret != NULL)
{
struct elf_m32r_link_hash_entry *eh;
eh = (struct elf_m32r_link_hash_entry *) ret;
eh->dyn_relocs = NULL;
}
return (struct bfd_hash_entry *) ret;
}
/* Create an m32r ELF linker hash table. */
static struct bfd_link_hash_table *
m32r_elf_link_hash_table_create (bfd *abfd)
{
struct elf_m32r_link_hash_table *ret;
bfd_size_type amt = sizeof (struct elf_m32r_link_hash_table);
ret = bfd_zmalloc (amt);
if (ret == NULL)
return NULL;
if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
m32r_elf_link_hash_newfunc,
sizeof (struct elf_m32r_link_hash_entry),
M32R_ELF_DATA))
{
free (ret);
return NULL;
}
return &ret->root.root;
}
/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
shortcuts to them in our hash table. */
static bfd_boolean
create_got_section (bfd *dynobj, struct bfd_link_info *info)
{
struct elf_m32r_link_hash_table *htab;
if (! _bfd_elf_create_got_section (dynobj, info))
return FALSE;
htab = m32r_elf_hash_table (info);
if (htab == NULL)
return FALSE;
htab->sgot = bfd_get_linker_section (dynobj, ".got");
htab->sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
htab->srelgot = bfd_get_linker_section (dynobj, ".rela.got");
if (! htab->sgot || ! htab->sgotplt || ! htab->srelgot)
abort ();
return TRUE;
}
/* Create dynamic sections when linking against a dynamic object. */
static bfd_boolean
m32r_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
{
struct elf_m32r_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 (abfd, 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->root.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 (abfd, s, ptralign))
return FALSE;
if (htab->sgot == NULL
&& ! 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 (abfd, s, ptralign))
return FALSE;
}
}
return TRUE;
}
/* Copy the extra info we tack onto an elf_link_hash_entry. */
static void
m32r_elf_copy_indirect_symbol (struct bfd_link_info *info,
struct elf_link_hash_entry *dir,
struct elf_link_hash_entry *ind)
{
struct elf_m32r_link_hash_entry * edir;
struct elf_m32r_link_hash_entry * eind;
edir = (struct elf_m32r_link_hash_entry *) dir;
eind = (struct elf_m32r_link_hash_entry *) ind;
if (eind->dyn_relocs != NULL)
{
if (edir->dyn_relocs != NULL)
{
struct elf_m32r_dyn_relocs **pp;
struct elf_m32r_dyn_relocs *p;
/* Add reloc counts against the indirect sym to the direct sym
list. Merge any entries against the same section. */
for (pp = &eind->dyn_relocs; (p = *pp) != NULL;)
{
struct elf_m32r_dyn_relocs *q;
for (q = edir->dyn_relocs; q != NULL; q = q->next)
if (q->sec == p->sec)
{
q->pc_count += p->pc_count;
q->count += p->count;
*pp = p->next;
break;
}
if (q == NULL)
pp = &p->next;
}
*pp = edir->dyn_relocs;
}
edir->dyn_relocs = eind->dyn_relocs;
eind->dyn_relocs = NULL;
}
_bfd_elf_link_hash_copy_indirect (info, dir, ind);
}
/* Adjust a symbol defined by a dynamic object and referenced by a
regular object. The current definition is in some section of the
dynamic object, but we're not including those sections. We have to
change the definition to something the rest of the link can
understand. */
static bfd_boolean
m32r_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
struct elf_link_hash_entry *h)
{
struct elf_m32r_link_hash_table *htab;
struct elf_m32r_link_hash_entry *eh;
struct elf_m32r_dyn_relocs *p;
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->u.weakdef != NULL
|| (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->u.weakdef != NULL)
{
BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
|| h->u.weakdef->root.type == bfd_link_hash_defweak);
h->root.u.def.section = h->u.weakdef->root.u.def.section;
h->root.u.def.value = h->u.weakdef->root.u.def.value;
return TRUE;
}
/* This is a reference to a symbol defined by a dynamic object which
is not a function. */
/* If we are creating a shared library, we must presume that the
only references to the symbol are via the global offset table.
For such cases we need not do anything here; the relocations will
be handled correctly by relocate_section. */
if (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 (info->nocopyreloc)
{
h->non_got_ref = 0;
return TRUE;
}
eh = (struct elf_m32r_link_hash_entry *) h;
for (p = eh->dyn_relocs; p != NULL; p = p->next)
{
s = p->sec->output_section;
if (s != NULL && (s->flags & (SEC_READONLY | SEC_HAS_CONTENTS)) != 0)
break;
}
/* If we didn't find any dynamic relocs in sections which needs the
copy reloc, then we'll be keeping the dynamic relocs and avoiding
the copy reloc. */
if (p == NULL)
{
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 bfd_boolean
allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
{
struct bfd_link_info *info;
struct elf_m32r_link_hash_table *htab;
struct elf_m32r_link_hash_entry *eh;
struct elf_m32r_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;
eh = (struct elf_m32r_link_hash_entry *) h;
if (htab->root.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;
bfd_boolean 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->root.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 (eh->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_m32r_dyn_relocs **pp;
for (pp = &eh->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 (eh->dyn_relocs != NULL
&& h->root.type == bfd_link_hash_undefweak)
{
if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
eh->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->root.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;
}
eh->dyn_relocs = NULL;
keep: ;
}
/* Finally, allocate space. */
for (p = eh->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;
}
/* Find any dynamic relocs that apply to read-only sections. */
static bfd_boolean
readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
{
struct elf_m32r_link_hash_entry *eh;
struct elf_m32r_dyn_relocs *p;
eh = (struct elf_m32r_link_hash_entry *) h;
for (p = eh->dyn_relocs; p != NULL; p = p->next)
{
asection *s = p->sec->output_section;
if (s != NULL && (s->flags & SEC_READONLY) != 0)
{
struct bfd_link_info *info = (struct bfd_link_info *) inf;
info->flags |= DF_TEXTREL;
/* Not an error, just cut short the traversal. */
return FALSE;
}
}
return TRUE;
}
/* Set the sizes of the dynamic sections. */
static bfd_boolean
m32r_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
struct bfd_link_info *info)
{
struct elf_m32r_link_hash_table *htab;
bfd *dynobj;
asection *s;
bfd_boolean 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->root.dynobj;
BFD_ASSERT (dynobj != NULL);
if (htab->root.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_m32r_dyn_relocs *p;
for (p = ((struct elf_m32r_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->root, 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 (CONST_STRNEQ (bfd_get_section_name (dynobj, 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;
}
if (htab->root.dynamic_sections_created)
{
/* Add some entries to the .dynamic section. We fill in the
values later, in m32r_elf_finish_dynamic_sections, but we
must add the entries now so that we get the correct size for
the .dynamic section. The DT_DEBUG entry is filled in by the
dynamic linker and used by the debugger. */
#define add_dynamic_entry(TAG, VAL) \
_bfd_elf_add_dynamic_entry (info, TAG, VAL)
if (bfd_link_executable (info))
{
if (! add_dynamic_entry (DT_DEBUG, 0))
return FALSE;
}
if (htab->splt->size != 0)
{
if (! add_dynamic_entry (DT_PLTGOT, 0)
|| ! add_dynamic_entry (DT_PLTRELSZ, 0)
|| ! add_dynamic_entry (DT_PLTREL, DT_RELA)
|| ! add_dynamic_entry (DT_JMPREL, 0))
return FALSE;
}
if (relocs)
{
if (! add_dynamic_entry (DT_RELA, 0)
|| ! add_dynamic_entry (DT_RELASZ, 0)
|| ! add_dynamic_entry (DT_RELAENT,
sizeof (Elf32_External_Rela)))
return FALSE;
/* If any dynamic relocs apply to a read-only section,
then we need a DT_TEXTREL entry. */
if ((info->flags & DF_TEXTREL) == 0)
elf_link_hash_traverse (&htab->root, readonly_dynrelocs,
info);
if ((info->flags & DF_TEXTREL) != 0)
{
if (! add_dynamic_entry (DT_TEXTREL, 0))
return FALSE;
}
}
}
#undef add_dynamic_entry
return TRUE;
}
/* 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 bfd_boolean
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. */
bfd_boolean ret = TRUE;
struct elf_m32r_link_hash_table *htab = m32r_elf_hash_table (info);
bfd *dynobj;
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;
dynobj = htab->root.dynobj;
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;
bfd_boolean use_rel = FALSE;
h = NULL;
r_type = ELF32_R_TYPE (rel->r_info);
if (r_type < 0 || r_type >= (int) R_M32R_max)
{
(*_bfd_error_handler) (_("%B: unknown relocation type %d"),
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)
{
bfd_boolean dyn;
sec = h->root.u.def.section;
dyn = htab->root.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)
(_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
input_bfd,
input_section,
(long) 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_GENERATE_ERROR
|| 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)
{
bfd_boolean dyn;
bfd_vma off;
off = h->got.offset;
BFD_ASSERT (off != (bfd_vma) -1);
dyn = htab->root.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 = bfd_get_linker_section (dynobj,
".rela.got");
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