mirror of
https://github.com/darlinghq/darling-gdb.git
synced 2024-12-05 02:47:05 +00:00
350 lines
11 KiB
C
350 lines
11 KiB
C
/* picoJava specific support for 32-bit ELF
|
|
Copyright 1999, 2000 Free Software Foundation, Inc.
|
|
Contributed by Steve Chamberlan of Transmeta (sac@pobox.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 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
|
|
|
#include "bfd.h"
|
|
#include "sysdep.h"
|
|
#include "bfdlink.h"
|
|
#include "libbfd.h"
|
|
#include "elf-bfd.h"
|
|
#include "elf/pj.h"
|
|
|
|
static bfd_reloc_status_type pj_elf_reloc
|
|
PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
|
|
static reloc_howto_type *pj_elf_reloc_type_lookup
|
|
PARAMS ((bfd *, bfd_reloc_code_real_type));
|
|
static void pj_elf_info_to_howto
|
|
PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
|
|
static void pj_elf_final_write_processing
|
|
PARAMS ((bfd *, boolean));
|
|
|
|
static reloc_howto_type pj_elf_howto_table[] =
|
|
{
|
|
/* No relocation. */
|
|
HOWTO (R_PJ_NONE, /* type */
|
|
0, /* rightshift */
|
|
0, /* size (0 = byte, 1 = short, 2 = long) */
|
|
0, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
pj_elf_reloc, /* special_function */
|
|
"R_PJ_NONE", /* name */
|
|
false, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* 32 bit absolute relocation. Setting partial_inplace to true and
|
|
src_mask to a non-zero value is similar to the COFF toolchain. */
|
|
HOWTO (R_PJ_DATA_DIR32, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
32, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
pj_elf_reloc, /* special_function */
|
|
"R_PJ_DIR32", /* name */
|
|
true, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* 32 bit PC relative relocation. */
|
|
HOWTO (R_PJ_CODE_REL32, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
32, /* bitsize */
|
|
true, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
pj_elf_reloc, /* special_function */
|
|
"R_PJ_REL32", /* name */
|
|
false, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
true), /* pcrel_offset */
|
|
|
|
/* 16 bit PC relative relocation. */
|
|
HOWTO (R_PJ_CODE_REL16, /* type */
|
|
0, /* rightshift */
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
true, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overf6w */
|
|
pj_elf_reloc, /* special_function */
|
|
"R_PJ_REL16", /* name */
|
|
false, /* partial_inplace */
|
|
0xffff, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
true), /* pcrel_offset */
|
|
EMPTY_HOWTO (4),
|
|
EMPTY_HOWTO (5),
|
|
HOWTO (R_PJ_CODE_DIR32, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
32, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
pj_elf_reloc, /* special_function */
|
|
"R_PJ_CODE_DIR32", /* name */
|
|
true, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
EMPTY_HOWTO (7),
|
|
EMPTY_HOWTO (8),
|
|
EMPTY_HOWTO (9),
|
|
EMPTY_HOWTO (10),
|
|
EMPTY_HOWTO (11),
|
|
EMPTY_HOWTO (12),
|
|
|
|
HOWTO (R_PJ_CODE_LO16, /* type */
|
|
0, /* rightshift */
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_unsigned, /* complain_on_overflow */
|
|
pj_elf_reloc, /* special_function */
|
|
"R_PJ_LO16", /* name */
|
|
false, /* partial_inplace */
|
|
0xffff, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
true), /* pcrel_offset */
|
|
|
|
HOWTO (R_PJ_CODE_HI16, /* type */
|
|
16, /* rightshift */
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_unsigned, /* complain_on_overflow */
|
|
pj_elf_reloc, /* special_function */
|
|
"R_PJ_HI16", /* name */
|
|
false, /* partial_inplace */
|
|
0xffff, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
true), /* pcrel_offset */
|
|
|
|
/* GNU extension to record C++ vtable hierarchy */
|
|
HOWTO (R_PJ_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_PJ_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_PJ_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_PJ_GNU_VTENTRY", /* name */
|
|
false, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
};
|
|
|
|
/* This function is used for normal relocs. This is like the COFF
|
|
function, and is almost certainly incorrect for other ELF targets. */
|
|
|
|
static bfd_reloc_status_type
|
|
pj_elf_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd,
|
|
error_message)
|
|
bfd *abfd;
|
|
arelent *reloc_entry;
|
|
asymbol *symbol_in;
|
|
PTR data;
|
|
asection *input_section;
|
|
bfd *output_bfd;
|
|
char **error_message ATTRIBUTE_UNUSED;
|
|
{
|
|
unsigned long insn;
|
|
bfd_vma sym_value;
|
|
enum elf_pj_reloc_type r_type;
|
|
bfd_vma addr = reloc_entry->address;
|
|
bfd_byte *hit_data = addr + (bfd_byte *) data;
|
|
|
|
r_type = (enum elf_pj_reloc_type) reloc_entry->howto->type;
|
|
|
|
if (output_bfd != NULL)
|
|
{
|
|
/* Partial linking--do nothing. */
|
|
reloc_entry->address += input_section->output_offset;
|
|
return bfd_reloc_ok;
|
|
}
|
|
|
|
if (symbol_in != NULL
|
|
&& bfd_is_und_section (symbol_in->section))
|
|
return bfd_reloc_undefined;
|
|
|
|
if (bfd_is_com_section (symbol_in->section))
|
|
sym_value = 0;
|
|
else
|
|
sym_value = (symbol_in->value +
|
|
symbol_in->section->output_section->vma +
|
|
symbol_in->section->output_offset);
|
|
|
|
switch (r_type)
|
|
{
|
|
case R_PJ_DATA_DIR32:
|
|
insn = bfd_get_32 (abfd, hit_data);
|
|
insn += sym_value + reloc_entry->addend;
|
|
bfd_put_32 (abfd, insn, hit_data);
|
|
break;
|
|
|
|
/* Relocations in code are always bigendian, no matter what the
|
|
data endianness is. */
|
|
|
|
case R_PJ_CODE_DIR32:
|
|
insn = bfd_getb32 (hit_data);
|
|
insn += sym_value + reloc_entry->addend;
|
|
bfd_putb32 (insn, hit_data);
|
|
break;
|
|
|
|
case R_PJ_CODE_REL16:
|
|
insn = bfd_getb16 (hit_data);
|
|
insn += sym_value + reloc_entry->addend
|
|
- (input_section->output_section->vma
|
|
+ input_section->output_offset);
|
|
bfd_putb16 (insn, hit_data);
|
|
break;
|
|
case R_PJ_CODE_LO16:
|
|
insn = bfd_getb16 (hit_data);
|
|
insn += sym_value + reloc_entry->addend;
|
|
bfd_putb16 (insn, hit_data);
|
|
break;
|
|
|
|
case R_PJ_CODE_HI16:
|
|
insn = bfd_getb16 (hit_data);
|
|
insn += (sym_value + reloc_entry->addend) >> 16;
|
|
bfd_putb16 (insn, hit_data);
|
|
break;
|
|
|
|
default:
|
|
abort ();
|
|
break;
|
|
}
|
|
|
|
return bfd_reloc_ok;
|
|
}
|
|
|
|
/* This structure is used to map BFD reloc codes to PJ ELF relocs. */
|
|
|
|
struct elf_reloc_map
|
|
{
|
|
bfd_reloc_code_real_type bfd_reloc_val;
|
|
unsigned char elf_reloc_val;
|
|
};
|
|
|
|
/* An array mapping BFD reloc codes to PJ ELF relocs. */
|
|
|
|
static const struct elf_reloc_map pj_reloc_map[] =
|
|
{
|
|
{ BFD_RELOC_NONE, R_PJ_NONE },
|
|
{ BFD_RELOC_32, R_PJ_DATA_DIR32 },
|
|
{ BFD_RELOC_PJ_CODE_DIR16, R_PJ_CODE_DIR16 },
|
|
{ BFD_RELOC_PJ_CODE_DIR32, R_PJ_CODE_DIR32 },
|
|
{ BFD_RELOC_PJ_CODE_LO16, R_PJ_CODE_LO16 },
|
|
{ BFD_RELOC_PJ_CODE_HI16, R_PJ_CODE_HI16 },
|
|
{ BFD_RELOC_PJ_CODE_REL32, R_PJ_CODE_REL32 },
|
|
{ BFD_RELOC_PJ_CODE_REL16, R_PJ_CODE_REL16 },
|
|
{ BFD_RELOC_VTABLE_INHERIT, R_PJ_GNU_VTINHERIT },
|
|
{ BFD_RELOC_VTABLE_ENTRY, R_PJ_GNU_VTENTRY },
|
|
};
|
|
|
|
/* Given a BFD reloc code, return the howto structure for the
|
|
corresponding PJ ELf reloc. */
|
|
|
|
static reloc_howto_type *
|
|
pj_elf_reloc_type_lookup (abfd, code)
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
|
bfd_reloc_code_real_type code;
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < sizeof (pj_reloc_map) / sizeof (struct elf_reloc_map); i++)
|
|
{
|
|
if (pj_reloc_map[i].bfd_reloc_val == code)
|
|
return &pj_elf_howto_table[(int) pj_reloc_map[i].elf_reloc_val];
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Given an ELF reloc, fill in the howto field of a relent. */
|
|
|
|
static void
|
|
pj_elf_info_to_howto (abfd, cache_ptr, dst)
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
|
arelent *cache_ptr;
|
|
Elf_Internal_Rela *dst;
|
|
{
|
|
unsigned int r;
|
|
|
|
r = ELF32_R_TYPE (dst->r_info);
|
|
|
|
BFD_ASSERT (r < (unsigned int) R_PJ_max);
|
|
|
|
cache_ptr->howto = &pj_elf_howto_table[r];
|
|
}
|
|
|
|
/* Take this moment to fill in the special picoJava bits in the
|
|
e_flags field. */
|
|
|
|
static void
|
|
pj_elf_final_write_processing (abfd, linker)
|
|
bfd *abfd;
|
|
boolean linker ATTRIBUTE_UNUSED;
|
|
{
|
|
elf_elfheader (abfd)->e_flags |= EF_PICOJAVA_ARCH;
|
|
elf_elfheader (abfd)->e_flags |= EF_PICOJAVA_GNUCALLS;
|
|
}
|
|
|
|
#define TARGET_BIG_SYM bfd_elf32_pj_vec
|
|
#define TARGET_BIG_NAME "elf32-pj"
|
|
#define TARGET_LITTLE_SYM bfd_elf32_pjl_vec
|
|
#define TARGET_LITTLE_NAME "elf32-pjl"
|
|
#define ELF_ARCH bfd_arch_pj
|
|
#define ELF_MACHINE_CODE EM_PJ
|
|
#define ELF_MAXPAGESIZE 0x1000
|
|
#define bfd_elf32_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
|
|
#define bfd_elf32_bfd_reloc_type_lookup pj_elf_reloc_type_lookup
|
|
#define elf_backend_final_write_processing pj_elf_final_write_processing
|
|
#define elf_info_to_howto pj_elf_info_to_howto
|
|
#include "elf32-target.h"
|