diff options
Diffstat (limited to 'binutils-2.25/bfd/elf32-pj.c')
| -rw-r--r-- | binutils-2.25/bfd/elf32-pj.c | 353 |
1 files changed, 353 insertions, 0 deletions
diff --git a/binutils-2.25/bfd/elf32-pj.c b/binutils-2.25/bfd/elf32-pj.c new file mode 100644 index 00000000..b7a10182 --- /dev/null +++ b/binutils-2.25/bfd/elf32-pj.c @@ -0,0 +1,353 @@ +/* picoJava specific support for 32-bit ELF + Copyright 1999, 2000, 2001, 2002, 2005, 2007 + 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 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/pj.h" + +/* 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 (bfd *abfd, + arelent *reloc_entry, + asymbol *symbol_in, + void * 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, (bfd_vma) 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 ((bfd_vma) 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 ((bfd_vma) insn, hit_data); + break; + case R_PJ_CODE_LO16: + insn = bfd_getb16 (hit_data); + insn += sym_value + reloc_entry->addend; + bfd_putb16 ((bfd_vma) insn, hit_data); + break; + + case R_PJ_CODE_HI16: + insn = bfd_getb16 (hit_data); + insn += (sym_value + reloc_entry->addend) >> 16; + bfd_putb16 ((bfd_vma) insn, hit_data); + break; + + default: + abort (); + break; + } + + return bfd_reloc_ok; +} + +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 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 (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; +} + +static reloc_howto_type * +pj_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, + const char *r_name) +{ + unsigned int i; + + for (i = 0; + i < sizeof (pj_elf_howto_table) / sizeof (pj_elf_howto_table[0]); + i++) + if (pj_elf_howto_table[i].name != NULL + && strcasecmp (pj_elf_howto_table[i].name, r_name) == 0) + return &pj_elf_howto_table[i]; + + return NULL; +} + +/* Given an ELF reloc, fill in the howto field of a relent. */ + +static void +pj_elf_info_to_howto (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 (bfd *abfd, + bfd_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_MACHINE_ALT1 EM_PJ_OLD +#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 bfd_elf32_bfd_reloc_name_lookup pj_elf_reloc_name_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" |