mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-27 03:51:15 +08:00
d87bef3a7b
The newer update-copyright.py fixes file encoding too, removing cr/lf on binutils/bfdtest2.c and ld/testsuite/ld-cygwin/exe-export.exp, and embedded cr in binutils/testsuite/binutils-all/ar.exp string match.
326 lines
9.6 KiB
C
326 lines
9.6 KiB
C
/* Freescale S12Z-specific support for 32-bit ELF
|
|
Copyright (C) 1999-2023 Free Software Foundation, Inc.
|
|
(Heavily copied from the D10V port by Martin Hunt (hunt@cygnus.com))
|
|
|
|
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 "bfdlink.h"
|
|
#include "libbfd.h"
|
|
#include "elf-bfd.h"
|
|
|
|
#include "elf/s12z.h"
|
|
|
|
/* All users of this file have bfd_octets_per_byte (abfd, sec) == 1. */
|
|
#define OCTETS_PER_BYTE(ABFD, SEC) 1
|
|
|
|
/* Relocation functions. */
|
|
static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
|
|
(bfd *, bfd_reloc_code_real_type);
|
|
static bool s12z_info_to_howto_rel
|
|
(bfd *, arelent *, Elf_Internal_Rela *);
|
|
|
|
static bfd_reloc_status_type
|
|
opru18_reloc (bfd *abfd, arelent *reloc_entry, struct bfd_symbol *symbol,
|
|
void *data, asection *input_section ATTRIBUTE_UNUSED,
|
|
bfd *output ATTRIBUTE_UNUSED, char **msg ATTRIBUTE_UNUSED)
|
|
{
|
|
/* This reloc is used for 18 bit General Operand Addressing Postbyte in the
|
|
INST opru18 form. This is an 18 bit reloc, but the most significant bit
|
|
is shifted one place to the left of where it would normally be. See
|
|
Appendix A.4 of the S12Z reference manual. */
|
|
|
|
bfd_size_type octets = (reloc_entry->address
|
|
* OCTETS_PER_BYTE (abfd, input_section));
|
|
bfd_vma result = bfd_get_24 (abfd, (unsigned char *) data + octets);
|
|
bfd_vma val = bfd_asymbol_value (symbol);
|
|
|
|
/* Keep the wanted bits and discard the rest. */
|
|
result &= 0xFA0000;
|
|
|
|
val += symbol->section->output_section->vma;
|
|
val += symbol->section->output_offset;
|
|
|
|
/* The lowest 17 bits are copied verbatim. */
|
|
result |= val & 0x1FFFF;
|
|
|
|
/* The 18th bit is put into the 19th position. */
|
|
result |= (val & 0x020000) << 1;
|
|
|
|
bfd_put_24 (abfd, result, (unsigned char *) data + octets);
|
|
|
|
return bfd_reloc_ok;
|
|
}
|
|
|
|
|
|
static bfd_reloc_status_type
|
|
shift_addend_reloc (bfd *abfd, arelent *reloc_entry, struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
|
|
void *data ATTRIBUTE_UNUSED, asection *input_section ATTRIBUTE_UNUSED,
|
|
bfd *output ATTRIBUTE_UNUSED, char **msg ATTRIBUTE_UNUSED)
|
|
{
|
|
/* This is a really peculiar reloc, which is done for compatibility
|
|
with the Freescale toolchain.
|
|
|
|
That toolchain appears to (ab)use the lowest 15 bits of the addend for
|
|
the purpose of holding flags. The purpose of these flags are unknown.
|
|
So in this function, when writing the bfd we left shift the addend by
|
|
15, and when reading we right shift it by 15 (discarding the lower bits).
|
|
|
|
This allows the linker to work with object files generated by Freescale,
|
|
as well as by Gas. */
|
|
|
|
if (abfd->is_linker_input)
|
|
reloc_entry->addend >>= 15;
|
|
else
|
|
reloc_entry->addend <<= 15;
|
|
|
|
return bfd_reloc_continue;
|
|
}
|
|
|
|
#define USE_REL 0
|
|
|
|
static reloc_howto_type elf_s12z_howto_table[] =
|
|
{
|
|
/* This reloc does nothing. */
|
|
HOWTO (R_S12Z_NONE, /* type */
|
|
0, /* rightshift */
|
|
0, /* size */
|
|
0, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_S12Z_NONE", /* name */
|
|
false, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* A 24 bit absolute relocation emitted by the OPR mode operands */
|
|
HOWTO (R_S12Z_OPR, /* type */
|
|
0, /* rightshift */
|
|
3, /* size */
|
|
24, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
shift_addend_reloc,
|
|
"R_S12Z_OPR", /* name */
|
|
false, /* partial_inplace */
|
|
0x00ffffff, /* src_mask */
|
|
0x00ffffff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* The purpose of this reloc is not known */
|
|
HOWTO (R_S12Z_UKNWN_2, /* type */
|
|
0, /* rightshift */
|
|
0, /* size */
|
|
0, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_S12Z_UKNWN_2", /* name */
|
|
false, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* A 15 bit PC-rel relocation */
|
|
HOWTO (R_S12Z_PCREL_7_15, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
15, /* bitsize */
|
|
true, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
shift_addend_reloc,
|
|
"R_S12Z_PCREL_7_15", /* name */
|
|
false, /* partial_inplace */
|
|
0x00, /* src_mask */
|
|
0x007fff, /* dst_mask */
|
|
true), /* pcrel_offset */
|
|
|
|
/* A 24 bit absolute relocation emitted by EXT24 mode operands */
|
|
HOWTO (R_S12Z_EXT24, /* type */
|
|
0, /* rightshift */
|
|
3, /* size */
|
|
24, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_S12Z_EXT24", /* name */
|
|
false, /* partial_inplace */
|
|
0x00000000, /* src_mask */
|
|
0x00ffffff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* An 18 bit absolute relocation */
|
|
HOWTO (R_S12Z_EXT18, /* type */
|
|
0, /* rightshift */
|
|
3, /* size */
|
|
18, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
opru18_reloc, /* special_function */
|
|
"R_S12Z_EXT18", /* name */
|
|
false, /* partial_inplace */
|
|
0x00000000, /* src_mask */
|
|
0x0005ffff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* A 32 bit absolute relocation. This kind of relocation is
|
|
schizophrenic - Although they appear in sections named .rela.debug.*
|
|
in some sections they behave as RELA relocs, but in others they have
|
|
an added of zero and behave as REL.
|
|
|
|
It is not recommended that new code emits this reloc. It is here
|
|
only to support existing elf files generated by third party
|
|
applications. */
|
|
|
|
HOWTO (R_S12Z_CW32, /* type */
|
|
0, /* rightshift */
|
|
4, /* size */
|
|
32, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_S12Z_CW32", /* name */
|
|
false, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* A 32 bit absolute relocation */
|
|
HOWTO (R_S12Z_EXT32, /* type */
|
|
0, /* rightshift */
|
|
4, /* size */
|
|
32, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_S12Z_EXT32", /* name */
|
|
false, /* partial_inplace */
|
|
0x00000000, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
};
|
|
|
|
/* Map BFD reloc types to S12Z ELF reloc types. */
|
|
|
|
struct s12z_reloc_map
|
|
{
|
|
bfd_reloc_code_real_type bfd_reloc_val;
|
|
unsigned char elf_reloc_val;
|
|
};
|
|
|
|
static const struct s12z_reloc_map s12z_reloc_map[] =
|
|
{
|
|
/* bfd reloc val */ /* elf reloc val */
|
|
{BFD_RELOC_NONE, R_S12Z_NONE},
|
|
{BFD_RELOC_32, R_S12Z_EXT32},
|
|
{BFD_RELOC_24, R_S12Z_EXT24},
|
|
{BFD_RELOC_16_PCREL, R_S12Z_PCREL_7_15},
|
|
{BFD_RELOC_S12Z_OPR, R_S12Z_OPR}
|
|
};
|
|
|
|
static reloc_howto_type *
|
|
bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
|
bfd_reloc_code_real_type code)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0;
|
|
i < sizeof (s12z_reloc_map) / sizeof (struct s12z_reloc_map);
|
|
i++)
|
|
{
|
|
if (s12z_reloc_map[i].bfd_reloc_val == code)
|
|
{
|
|
return &elf_s12z_howto_table[s12z_reloc_map[i].elf_reloc_val];
|
|
}
|
|
}
|
|
|
|
printf ("%s:%d Not found type %d\n", __FILE__, __LINE__, code);
|
|
|
|
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 (elf_s12z_howto_table)
|
|
/ sizeof (elf_s12z_howto_table[0]));
|
|
i++)
|
|
if (elf_s12z_howto_table[i].name != NULL
|
|
&& strcasecmp (elf_s12z_howto_table[i].name, r_name) == 0)
|
|
return &elf_s12z_howto_table[i];
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Set the howto pointer for an S12Z ELF reloc. */
|
|
|
|
static bool
|
|
s12z_info_to_howto_rel (bfd *abfd,
|
|
arelent *cache_ptr, Elf_Internal_Rela *dst)
|
|
{
|
|
unsigned int r_type = ELF32_R_TYPE (dst->r_info);
|
|
|
|
if (r_type >= (unsigned int) R_S12Z_max)
|
|
{
|
|
/* 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 = &elf_s12z_howto_table[r_type];
|
|
return true;
|
|
}
|
|
|
|
static bool
|
|
s12z_elf_set_mach_from_flags (bfd *abfd)
|
|
{
|
|
bfd_default_set_arch_mach (abfd, bfd_arch_s12z, 0);
|
|
|
|
return true;
|
|
}
|
|
|
|
#define ELF_ARCH bfd_arch_s12z
|
|
#define ELF_MACHINE_CODE EM_S12Z
|
|
#define ELF_MAXPAGESIZE 0x1000
|
|
|
|
#define TARGET_BIG_SYM s12z_elf32_vec
|
|
#define TARGET_BIG_NAME "elf32-s12z"
|
|
|
|
#define elf_info_to_howto NULL
|
|
#define elf_info_to_howto_rel s12z_info_to_howto_rel
|
|
#define elf_backend_object_p s12z_elf_set_mach_from_flags
|
|
|
|
#include "elf32-target.h"
|