/* V850-specific support for 32-bit ELF Copyright (C) 1994, 1995 Free Software Foundation, Inc. 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 "libbfd.h" #include "elf-bfd.h" static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); static void v850_info_to_howto_rel PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *)); static bfd_reloc_status_type bfd_elf32_v850_reloc PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); /* Try to minimize the amount of space occupied by relocation tables on the ROM (not that the ROM won't be swamped by other ELF overhead). */ #define USE_REL enum reloc_type { R_V850_NONE = 0, R_V850_9_PCREL, R_V850_22_PCREL, R_V850_HI16_S, R_V850_HI16, R_V850_LO16, R_V850_32, R_V850_16, R_V850_8, R_V850_SDA_OFFSET, R_V850_ZDA_OFFSET, R_V850_TDA_OFFSET, R_V850_max }; static reloc_howto_type elf_v850_howto_table[] = { /* This reloc does nothing. */ HOWTO (R_V850_NONE, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_V850_NONE", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ false), /* pcrel_offset */ /* A PC relative 9 bit branch. */ HOWTO (R_V850_9_PCREL, /* type */ 2, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 26, /* bitsize */ true, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ bfd_elf32_v850_reloc, /* special_function */ "R_V850_9_PCREL", /* name */ false, /* partial_inplace */ 0x00ffffff, /* src_mask */ 0x00ffffff, /* dst_mask */ true), /* pcrel_offset */ /* A PC relative 22 bit branch. */ HOWTO (R_V850_22_PCREL, /* type */ 2, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 22, /* bitsize */ true, /* pc_relative */ 7, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf32_v850_reloc, /* special_function */ "R_V850_22_PCREL", /* name */ false, /* partial_inplace */ 0x07ffff80, /* src_mask */ 0x07ffff80, /* dst_mask */ true), /* pcrel_offset */ /* High 16 bits of symbol value. */ HOWTO (R_V850_HI16_S, /* type */ 0, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont,/* complain_on_overflow */ bfd_elf32_v850_reloc, /* special_function */ "R_V850_HI16_S", /* name */ true, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* High 16 bits of symbol value. */ HOWTO (R_V850_HI16, /* type */ 0, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont,/* complain_on_overflow */ bfd_elf32_v850_reloc, /* special_function */ "R_V850_HI16", /* name */ true, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* Low 16 bits of symbol value. */ HOWTO (R_V850_LO16, /* type */ 0, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont,/* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_V850_LO16", /* name */ true, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* Simple 32bit reloc. */ HOWTO (R_V850_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_V850_32", /* name */ true, /* partial_inplace */ 0xffffffff, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ /* Simple 16bit reloc. */ HOWTO (R_V850_16, /* type */ 0, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont,/* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_V850_16", /* name */ true, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* Simple 8bit reloc. */ HOWTO (R_V850_8, /* type */ 0, /* rightshift */ 0, /* size (0 = byte, 1 = short, 2 = long) */ 8, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont,/* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_V850_8", /* name */ true, /* partial_inplace */ 0xff, /* src_mask */ 0xff, /* dst_mask */ false), /* pcrel_offset */ /* Offset from the short data area pointer. */ HOWTO (R_V850_SDA_OFFSET, /* type */ 0, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont,/* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_V850_SDA_OFFSET", /* name */ true, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* Offset from the tiny data area pointer. */ HOWTO (R_V850_TDA_OFFSET, /* type */ 0, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont,/* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_V850_TDA_OFFSET", /* name */ true, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* Offset from the zero data area pointer. */ HOWTO (R_V850_ZDA_OFFSET, /* type */ 0, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont,/* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_V850_ZDA_OFFSET", /* name */ true, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ }; /* Map BFD reloc types to V850 ELF reloc types. */ struct v850_reloc_map { unsigned char bfd_reloc_val; unsigned char elf_reloc_val; }; static const struct v850_reloc_map v850_reloc_map[] = { { BFD_RELOC_NONE, R_V850_NONE, }, { BFD_RELOC_V850_9_PCREL, R_V850_9_PCREL, }, { BFD_RELOC_V850_22_PCREL, R_V850_22_PCREL, }, { BFD_RELOC_HI16_S, R_V850_HI16_S, }, { BFD_RELOC_HI16, R_V850_HI16, }, { BFD_RELOC_LO16, R_V850_LO16, }, { BFD_RELOC_32, R_V850_32, }, { BFD_RELOC_16, R_V850_16, }, { BFD_RELOC_8, R_V850_8, }, { BFD_RELOC_V850_TDA_OFFSET, R_V850_TDA_OFFSET, }, { BFD_RELOC_V850_SDA_OFFSET, R_V850_SDA_OFFSET, }, { BFD_RELOC_V850_ZDA_OFFSET, R_V850_ZDA_OFFSET, }, }; static reloc_howto_type * bfd_elf32_bfd_reloc_type_lookup (abfd, code) bfd *abfd; bfd_reloc_code_real_type code; { unsigned int i; for (i = 0; i < sizeof (v850_reloc_map) / sizeof (struct v850_reloc_map); i++) { if (v850_reloc_map[i].bfd_reloc_val == code) return &elf_v850_howto_table[v850_reloc_map[i].elf_reloc_val]; } return NULL; } /* Set the howto pointer for an V850 ELF reloc. */ static void v850_info_to_howto_rel (abfd, cache_ptr, dst) bfd *abfd; arelent *cache_ptr; Elf32_Internal_Rel *dst; { unsigned int r_type; r_type = ELF32_R_TYPE (dst->r_info); BFD_ASSERT (r_type < (unsigned int) R_V850_max); cache_ptr->howto = &elf_v850_howto_table[r_type]; } static bfd_reloc_status_type bfd_elf32_v850_reloc (abfd, reloc, symbol, data, isection, obfd, err) bfd *abfd; arelent *reloc; asymbol *symbol; PTR data; asection *isection; bfd *obfd; char **err; { if (obfd != (bfd *) NULL && (symbol->flags & BSF_SECTION_SYM) == 0 && (! reloc->howto->partial_inplace || reloc->addend == 0)) { reloc->address += isection->output_offset; return bfd_reloc_ok; } else if (obfd != NULL) { return bfd_reloc_continue; } /* Catch relocs involving undefined symbols. */ if (bfd_is_und_section (symbol->section) && (symbol->flags & BSF_WEAK) == 0 && obfd == NULL) return bfd_reloc_undefined; /* We handle final linking of some relocs ourselves. */ { long relocation, insn; /* Is the address of the relocation really within the section? */ if (reloc->address > isection->_cooked_size) return bfd_reloc_outofrange; /* Work out which section the relocation is targetted at and the initial relocation command value. */ /* Get symbol value. (Common symbols are special.) */ if (bfd_is_com_section (symbol->section)) relocation = 0; else relocation = symbol->value; /* Convert input-section-relative symbol value to absolute + addend. */ relocation += symbol->section->output_section->vma; relocation += symbol->section->output_offset; relocation += reloc->addend; if (reloc->howto->pc_relative == true) { /* Here the variable relocation holds the final address of the symbol we are relocating against, plus any addend. */ relocation -= isection->output_section->vma + isection->output_offset; /* Deal with pcrel_offset */ relocation -= reloc->address; } /* I've got no clue... */ reloc->addend = 0; if (reloc->howto->type == R_V850_22_PCREL) { if (relocation > 0x1ffff || relocation < -0x200000) return bfd_reloc_overflow; if ((relocation % 2) != 0) return bfd_reloc_dangerous; insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc->address); insn &= ~0xfffe003f; insn |= (((relocation & 0xfffe) << 16) | ((relocation & 0x3f0000) >> 16)); bfd_put_32 (abfd, insn, (bfd_byte *)data + reloc->address); return bfd_reloc_ok; } else if (reloc->howto->type == R_V850_9_PCREL) { if (relocation > 0xff || relocation < -0x100) return bfd_reloc_overflow; if ((relocation % 2) != 0) return bfd_reloc_dangerous; insn = bfd_get_16 (abfd, (bfd_byte *) data + reloc->address); insn &= 0xf870; insn |= ((relocation & 0x1f0) << 7) | ((relocation & 0x0e) << 3); bfd_put_16 (abfd, insn, (bfd_byte *)data + reloc->address); return bfd_reloc_ok; } else if (reloc->howto->type == R_V850_HI16_S) { relocation += bfd_get_16 (abfd, (bfd_byte *) data + reloc->address); relocation = (relocation >> 16) + ((relocation & 0x8000) != 0); bfd_put_16 (abfd, relocation, (bfd_byte *)data + reloc->address); return bfd_reloc_ok; } else if (reloc->howto->type == R_V850_HI16) { relocation += bfd_get_16 (abfd, (bfd_byte *) data + reloc->address); relocation = (relocation >> 16); bfd_put_16 (abfd, relocation, (bfd_byte *)data + reloc->address); return bfd_reloc_ok; } } return bfd_reloc_continue; } static boolean bfd_elf32_v850_is_local_label PARAMS ((bfd *, asymbol *)); /*ARGSUSED*/ static boolean bfd_elf32_v850_is_local_label (abfd, symbol) bfd *abfd; asymbol *symbol; { return ((symbol->name[0] == '.' && (symbol->name[1] == 'L' || symbol->name[1] == '.')) || (symbol->name[0] == '_' && symbol->name[1] == '.' && symbol->name[2] == 'L' && symbol->name[3] == '_')); } #define bfd_elf32_bfd_is_local_label bfd_elf32_v850_is_local_label #define TARGET_LITTLE_SYM bfd_elf32_v850_vec #define TARGET_LITTLE_NAME "elf32-v850" #define ELF_ARCH bfd_arch_v850 #define ELF_MACHINE_CODE EM_CYGNUS_V850 #define ELF_MAXPAGESIZE 0x1000 #define elf_info_to_howto 0 #define elf_info_to_howto_rel v850_info_to_howto_rel #define elf_symbol_leading_char '_' #include "elf32-target.h"