/* picoJava specific support for 32-bit ELF Copyright (C) 1999-2014 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 pj_elf32_vec #define TARGET_BIG_NAME "elf32-pj" #define TARGET_LITTLE_SYM pj_elf32_le_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"