/* Zilog (e)Z80-specific support for 32-bit ELF
Copyright (C) 1999-2019 Free Software Foundation, Inc.
(Heavily copied from the S12Z port by Sergey Belyashov (sergey.belyashov@gmail.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/z80.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 bfd_boolean z80_info_to_howto_rel
(bfd *, arelent *, Elf_Internal_Rela *);
typedef struct {
bfd_reloc_code_real_type r_type;
reloc_howto_type howto;
} bfd_howto_type;
#define BFD_EMPTY_HOWTO(rt,x) {rt, EMPTY_HOWTO(x)}
#define BFD_HOWTO(rt,a,b,c,d,e,f,g,h,i,j,k,l,m) {rt, HOWTO(a,b,c,d,e,f,g,h,i,j,k,l,m)}
static const
bfd_howto_type elf_z80_howto_table[] =
{
/* This reloc does nothing. */
BFD_HOWTO (BFD_RELOC_NONE,
R_Z80_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_NONE", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
FALSE), /* pcrel_offset */
/* A 8 bit relocation */
BFD_HOWTO (BFD_RELOC_8,
R_Z80_8, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
8, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"r_imm8", /* name */
FALSE, /* partial_inplace */
0x00, /* src_mask */
0xff, /* dst_mask */
FALSE), /* pcrel_offset */
/* A 8 bit index register displacement relocation */
BFD_HOWTO (BFD_RELOC_Z80_DISP8,
R_Z80_8_DIS, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
8, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"r_off", /* name */
FALSE, /* partial_inplace */
0x00, /* src_mask */
0xff, /* dst_mask */
FALSE), /* pcrel_offset */
/* A 8 bit PC-rel relocation */
BFD_HOWTO (BFD_RELOC_8_PCREL,
R_Z80_8_PCREL, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
8, /* bitsize */
TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"r_jr", /* name */
FALSE, /* partial_inplace */
0x00, /* src_mask */
0xff, /* dst_mask */
TRUE), /* pcrel_offset */
/* An 16 bit absolute relocation */
BFD_HOWTO (BFD_RELOC_16,
R_Z80_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 */
bfd_elf_generic_reloc, /* special_function */
"r_imm16", /* name */
FALSE, /* partial_inplace */
0x00000000, /* src_mask */
0x0000ffff, /* dst_mask */
FALSE), /* pcrel_offset */
/* A 24 bit absolute relocation emitted by ADL mode operands */
BFD_HOWTO (BFD_RELOC_24,
R_Z80_24, /* type */
0, /* rightshift */
5, /* 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_imm24", /* name */
FALSE, /* partial_inplace */
0x00000000, /* src_mask */
0x00ffffff, /* dst_mask */
FALSE), /* pcrel_offset */
BFD_HOWTO (BFD_RELOC_32,
R_Z80_32, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont,/* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"r_imm32", /* name */
FALSE, /* partial_inplace */
0x00000000, /* src_mask */
0xffffffff, /* dst_mask */
FALSE), /* pcrel_offset */
/* First (lowest) 8 bits of multibyte relocation */
BFD_HOWTO (BFD_RELOC_Z80_BYTE0,
R_Z80_BYTE0, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont,/* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"r_byte0", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
0xff, /* dst_mask */
FALSE), /* pcrel_offset */
/* Second 8 bits of multibyte relocation */
BFD_HOWTO (BFD_RELOC_Z80_BYTE1,
R_Z80_BYTE1, /* type */
8, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont,/* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"r_byte1", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
0xff, /* dst_mask */
FALSE), /* pcrel_offset */
/* Third 8 bits of multibyte relocation */
BFD_HOWTO (BFD_RELOC_Z80_BYTE2,
R_Z80_BYTE2, /* type */
16, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont,/* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"r_byte2", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
0xff, /* dst_mask */
FALSE), /* pcrel_offset */
/* Fourth (highest) 8 bits of multibyte relocation */
BFD_HOWTO (BFD_RELOC_Z80_BYTE3,
R_Z80_BYTE3, /* type */
24, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont,/* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"r_byte3", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
0xff, /* dst_mask */
FALSE), /* pcrel_offset */
/* An 16 bit absolute relocation of lower word of multibyte value */
BFD_HOWTO (BFD_RELOC_Z80_WORD0,
R_Z80_WORD0, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont,/* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"r_word0", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
FALSE), /* pcrel_offset */
/* An 16 bit absolute relocation of higher word of multibyte value */
BFD_HOWTO (BFD_RELOC_Z80_WORD1,
R_Z80_WORD1, /* type */
16, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont,/* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"r_word1", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
FALSE), /* pcrel_offset */
};
static reloc_howto_type *
bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
bfd_reloc_code_real_type code)
{
enum
{
table_size = sizeof (elf_z80_howto_table) / sizeof (elf_z80_howto_table[0])
};
unsigned int i;
for (i = 0; i < table_size; i++)
{
if (elf_z80_howto_table[i].r_type == code)
return &elf_z80_howto_table[i].howto;
}
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)
{
enum
{
table_size = sizeof (elf_z80_howto_table) / sizeof (elf_z80_howto_table[0])
};
unsigned int i;
for (i = 0; i < table_size; i++)
{
if (elf_z80_howto_table[i].howto.name != NULL
&& strcasecmp (elf_z80_howto_table[i].howto.name, r_name) == 0)
return &elf_z80_howto_table[i].howto;
}
return NULL;
}
/* Set the howto pointer for an z80 ELF reloc. */
static bfd_boolean
z80_info_to_howto_rel (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst)
{
enum
{
table_size = sizeof (elf_z80_howto_table) / sizeof (elf_z80_howto_table[0])
};
unsigned int i;
unsigned int r_type = ELF32_R_TYPE (dst->r_info);
for (i = 0; i < table_size; i++)
{
if (elf_z80_howto_table[i].howto.type == r_type)
{
cache_ptr->howto = &elf_z80_howto_table[i].howto;
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;
}
static bfd_boolean
z80_elf_set_mach_from_flags (bfd *abfd)
{
int mach;
switch (elf_elfheader (abfd)->e_flags)
{
case EF_Z80_MACH_GBZ80:
mach = bfd_mach_gbz80;
break;
case EF_Z80_MACH_Z80:
mach = bfd_mach_z80;
break;
case EF_Z80_MACH_Z180:
mach = bfd_mach_z180;
break;
case EF_Z80_MACH_EZ80_Z80:
mach = bfd_mach_ez80_z80;
break;
case EF_Z80_MACH_EZ80_ADL:
mach = bfd_mach_ez80_adl;
break;
case EF_Z80_MACH_R800:
mach = bfd_mach_r800;
break;
default:
mach = bfd_mach_z80;
break;
}
bfd_default_set_arch_mach (abfd, bfd_arch_z80, mach);
return TRUE;
}
static int
z80_is_local_label_name (bfd * abfd ATTRIBUTE_UNUSED,
const char * name)
{
return (name[0] == '.' && name[1] == 'L') ||
_bfd_elf_is_local_label_name (abfd, name);
}
#define ELF_ARCH bfd_arch_z80
#define ELF_MACHINE_CODE EM_Z80
#define ELF_MAXPAGESIZE 0x10000
#define TARGET_LITTLE_SYM z80_elf32_vec
#define TARGET_LITTLE_NAME "elf32-z80"
#define elf_info_to_howto NULL
#define elf_info_to_howto_rel z80_info_to_howto_rel
#define elf_backend_object_p z80_elf_set_mach_from_flags
#define bfd_elf32_bfd_is_local_label_name z80_is_local_label_name
#include "elf32-target.h"