/* FRV-specific support for 32-bit ELF. Copyright (C) 2002 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" #include "elf/frv.h" /* Forward declarations. */ static bfd_reloc_status_type elf32_frv_relocate_lo16 PARAMS ((bfd *, Elf_Internal_Rela *, bfd_byte *, bfd_vma)); static bfd_reloc_status_type elf32_frv_relocate_hi16 PARAMS ((bfd *, Elf_Internal_Rela *, bfd_byte *, bfd_vma)); static bfd_reloc_status_type elf32_frv_relocate_label24 PARAMS ((bfd *, asection *, Elf_Internal_Rela *, bfd_byte *, bfd_vma)); static bfd_reloc_status_type elf32_frv_relocate_gprel12 PARAMS ((struct bfd_link_info *, bfd *, asection *, Elf_Internal_Rela *, bfd_byte *, bfd_vma)); static bfd_reloc_status_type elf32_frv_relocate_gprelu12 PARAMS ((struct bfd_link_info *, bfd *, asection *, Elf_Internal_Rela *, bfd_byte *, bfd_vma)); static bfd_reloc_status_type elf32_frv_relocate_gprello PARAMS ((struct bfd_link_info *, bfd *, asection *, Elf_Internal_Rela *, bfd_byte *, bfd_vma)); static bfd_reloc_status_type elf32_frv_relocate_gprelhi PARAMS ((struct bfd_link_info *, bfd *, asection *, Elf_Internal_Rela *, bfd_byte *, bfd_vma)); static reloc_howto_type *frv_reloc_type_lookup PARAMS ((bfd *, bfd_reloc_code_real_type)); static void frv_info_to_howto_rela PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); static boolean elf32_frv_relocate_section PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); static boolean elf32_frv_add_symbol_hook PARAMS (( bfd *, struct bfd_link_info *, const Elf_Internal_Sym *, const char **, flagword *, asection **, bfd_vma *)); static bfd_reloc_status_type frv_final_link_relocate PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, bfd_vma)); static boolean elf32_frv_gc_sweep_hook PARAMS ((bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *)); static asection * elf32_frv_gc_mark_hook PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, struct elf_link_hash_entry *, Elf_Internal_Sym *)); static boolean elf32_frv_check_relocs PARAMS ((bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *)); static int elf32_frv_machine PARAMS ((bfd *)); static boolean elf32_frv_object_p PARAMS ((bfd *)); static boolean frv_elf_set_private_flags PARAMS ((bfd *, flagword)); static boolean frv_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *)); static boolean frv_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *)); static boolean frv_elf_print_private_bfd_data PARAMS ((bfd *, PTR)); static reloc_howto_type elf32_frv_howto_table [] = { /* This reloc does nothing. */ HOWTO (R_FRV_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_FRV_NONE", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ false), /* pcrel_offset */ /* A 32 bit absolute relocation. */ HOWTO (R_FRV_32, /* 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_FRV_32", /* name */ false, /* partial_inplace */ 0xffffffff, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ /* A 16 bit pc-relative relocation. */ HOWTO (R_FRV_LABEL16, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ true, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_FRV_LABEL16", /* name */ false, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ true), /* pcrel_offset */ /* A 24-bit pc-relative relocation. */ HOWTO (R_FRV_LABEL24, /* 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_elf_generic_reloc, /* special_function */ "R_FRV_LABEL24", /* name */ false, /* partial_inplace */ 0x7e03ffff, /* src_mask */ 0x7e03ffff, /* dst_mask */ true), /* pcrel_offset */ HOWTO (R_FRV_LO16, /* type */ 0, /* rightshift */ 2, /* 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_FRV_LO16", /* name */ false, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ HOWTO (R_FRV_HI16, /* type */ 0, /* rightshift */ 2, /* 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_FRV_HI16", /* name */ false, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ HOWTO (R_FRV_GPREL12, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 12, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_FRV_GPREL12", /* name */ false, /* partial_inplace */ 0xfff, /* src_mask */ 0xfff, /* dst_mask */ false), /* pcrel_offset */ HOWTO (R_FRV_GPRELU12, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 12, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_FRV_GPRELU12", /* name */ false, /* partial_inplace */ 0xfff, /* src_mask */ 0x3f03f, /* dst_mask */ false), /* pcrel_offset */ HOWTO (R_FRV_GPREL32, /* 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_FRV_GPREL32", /* name */ false, /* partial_inplace */ 0xffffffff, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ HOWTO (R_FRV_GPRELHI, /* type */ 0, /* rightshift */ 2, /* 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_FRV_GPRELHI", /* name */ false, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ HOWTO (R_FRV_GPRELLO, /* type */ 0, /* rightshift */ 2, /* 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_FRV_GPRELLO", /* name */ false, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ }; /* GNU extension to record C++ vtable hierarchy. */ static reloc_howto_type elf32_frv_vtinherit_howto = HOWTO (R_FRV_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_FRV_GNU_VTINHERIT", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ false); /* pcrel_offset */ /* GNU extension to record C++ vtable member usage. */ static reloc_howto_type elf32_frv_vtentry_howto = HOWTO (R_FRV_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_FRV_GNU_VTENTRY", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ false); /* pcrel_offset */ /* Map BFD reloc types to FRV ELF reloc types. */ #if 0 struct frv_reloc_map { unsigned int bfd_reloc_val; unsigned int frv_reloc_val; }; static const struct frv_reloc_map frv_reloc_map [] = { { BFD_RELOC_NONE, R_FRV_NONE }, { BFD_RELOC_32, R_FRV_32 }, { BFD_RELOC_FRV_LABEL16, R_FRV_LABEL16 }, { BFD_RELOC_FRV_LABEL24, R_FRV_LABEL24 }, { BFD_RELOC_FRV_LO16, R_FRV_LO16 }, { BFD_RELOC_FRV_HI16, R_FRV_HI16 }, { BFD_RELOC_FRV_GPREL12, R_FRV_GPREL12 }, { BFD_RELOC_FRV_GPRELU12, R_FRV_GPRELU12 }, { BFD_RELOC_FRV_GPREL32, R_FRV_GPREL32 }, { BFD_RELOC_FRV_GPRELHI, R_FRV_GPRELHI }, { BFD_RELOC_FRV_GPRELLO, R_FRV_GPRELLO }, { BFD_RELOC_VTABLE_INHERIT, R_FRV_GNU_VTINHERIT }, { BFD_RELOC_VTABLE_ENTRY, R_FRV_GNU_VTENTRY }, }; #endif /* Handle an FRV small data reloc. */ static bfd_reloc_status_type elf32_frv_relocate_gprel12 (info, input_bfd, input_section, relocation, contents, value) struct bfd_link_info *info; bfd *input_bfd; asection *input_section; Elf_Internal_Rela *relocation; bfd_byte *contents; bfd_vma value; { bfd_vma insn; bfd_vma gp; struct bfd_link_hash_entry *h; h = bfd_link_hash_lookup (info->hash, "_gp", false, false, true); gp = (h->u.def.value + h->u.def.section->output_section->vma + h->u.def.section->output_offset); value -= input_section->output_section->vma; value -= (gp - input_section->output_section->vma); insn = bfd_get_32 (input_bfd, contents + relocation->r_offset); value += relocation->r_addend; if ((long) value > 0x7ff || (long) value < -0x800) return bfd_reloc_overflow; bfd_put_32 (input_bfd, (insn & 0xfffff000) | (value & 0xfff), contents + relocation->r_offset); return bfd_reloc_ok; } /* Handle an FRV small data reloc. for the u12 field. */ static bfd_reloc_status_type elf32_frv_relocate_gprelu12 (info, input_bfd, input_section, relocation, contents, value) struct bfd_link_info *info; bfd *input_bfd; asection *input_section; Elf_Internal_Rela *relocation; bfd_byte *contents; bfd_vma value; { bfd_vma insn; bfd_vma gp; struct bfd_link_hash_entry *h; bfd_vma mask; h = bfd_link_hash_lookup (info->hash, "_gp", false, false, true); gp = (h->u.def.value + h->u.def.section->output_section->vma + h->u.def.section->output_offset); value -= input_section->output_section->vma; value -= (gp - input_section->output_section->vma); insn = bfd_get_32 (input_bfd, contents + relocation->r_offset); value += relocation->r_addend; if ((long) value > 0x7ff || (long) value < -0x800) return bfd_reloc_overflow; /* The high 6 bits go into bits 17-12. The low 6 bits go into bits 5-0. */ mask = 0x3f03f; insn = (insn & ~mask) | ((value & 0xfc0) << 12) | (value & 0x3f); bfd_put_32 (input_bfd, insn, contents + relocation->r_offset); return bfd_reloc_ok; } /* Handle an FRV ELF HI16 reloc. */ static bfd_reloc_status_type elf32_frv_relocate_hi16 (input_bfd, relhi, contents, value) bfd *input_bfd; Elf_Internal_Rela *relhi; bfd_byte *contents; bfd_vma value; { bfd_vma insn; insn = bfd_get_32 (input_bfd, contents + relhi->r_offset); value += relhi->r_addend; value = ((value >> 16) & 0xffff); insn = (insn & 0xffff0000) | value; if ((long) value > 0xffff || (long) value < -0x10000) return bfd_reloc_overflow; bfd_put_32 (input_bfd, insn, contents + relhi->r_offset); return bfd_reloc_ok; } static bfd_reloc_status_type elf32_frv_relocate_lo16 (input_bfd, rello, contents, value) bfd *input_bfd; Elf_Internal_Rela *rello; bfd_byte *contents; bfd_vma value; { bfd_vma insn; insn = bfd_get_32 (input_bfd, contents + rello->r_offset); value += rello->r_addend; value = value & 0xffff; insn = (insn & 0xffff0000) | value; if ((long) value > 0xffff || (long) value < -0x10000) return bfd_reloc_overflow; bfd_put_32 (input_bfd, insn, contents + rello->r_offset); return bfd_reloc_ok; } /* Perform the relocation for the CALL label24 instruction. */ static bfd_reloc_status_type elf32_frv_relocate_label24 (input_bfd, input_section, rello, contents, value) bfd *input_bfd; asection *input_section; Elf_Internal_Rela *rello; bfd_byte *contents; bfd_vma value; { bfd_vma insn; bfd_vma label6; bfd_vma label18; /* The format for the call instruction is: 0 000000 0001111 000000000000000000 label6 opcode label18 The branch calculation is: pc + (4*label24) where label24 is the concatenation of label6 and label18. */ /* Grab the instruction. */ insn = bfd_get_32 (input_bfd, contents + rello->r_offset); value -= input_section->output_section->vma + input_section->output_offset; value -= rello->r_offset; value += rello->r_addend; value = value >> 2; label6 = value & 0xfc0000; label6 = label6 << 7; label18 = value & 0x3ffff; insn = insn & 0x803c0000; insn = insn | label6; insn = insn | label18; bfd_put_32 (input_bfd, insn, contents + rello->r_offset); return bfd_reloc_ok; } static bfd_reloc_status_type elf32_frv_relocate_gprelhi (info, input_bfd, input_section, relocation, contents, value) struct bfd_link_info *info; bfd *input_bfd; asection *input_section; Elf_Internal_Rela *relocation; bfd_byte *contents; bfd_vma value; { bfd_vma insn; bfd_vma gp; struct bfd_link_hash_entry *h; h = bfd_link_hash_lookup (info->hash, "_gp", false, false, true); gp = (h->u.def.value + h->u.def.section->output_section->vma + h->u.def.section->output_offset); value -= input_section->output_section->vma; value -= (gp - input_section->output_section->vma); value += relocation->r_addend; value = ((value >> 16) & 0xffff); if ((long) value > 0xffff || (long) value < -0x10000) return bfd_reloc_overflow; insn = bfd_get_32 (input_bfd, contents + relocation->r_offset); insn = (insn & 0xffff0000) | value; bfd_put_32 (input_bfd, insn, contents + relocation->r_offset); return bfd_reloc_ok; } static bfd_reloc_status_type elf32_frv_relocate_gprello (info, input_bfd, input_section, relocation, contents, value) struct bfd_link_info *info; bfd *input_bfd; asection *input_section; Elf_Internal_Rela *relocation; bfd_byte *contents; bfd_vma value; { bfd_vma insn; bfd_vma gp; struct bfd_link_hash_entry *h; h = bfd_link_hash_lookup (info->hash, "_gp", false, false, true); gp = (h->u.def.value + h->u.def.section->output_section->vma + h->u.def.section->output_offset); value -= input_section->output_section->vma; value -= (gp - input_section->output_section->vma); value += relocation->r_addend; value = value & 0xffff; if ((long) value > 0xffff || (long) value < -0x10000) return bfd_reloc_overflow; insn = bfd_get_32 (input_bfd, contents + relocation->r_offset); insn = (insn & 0xffff0000) | value; bfd_put_32 (input_bfd, insn, contents + relocation->r_offset); return bfd_reloc_ok; } static reloc_howto_type * frv_reloc_type_lookup (abfd, code) bfd * abfd ATTRIBUTE_UNUSED; bfd_reloc_code_real_type code; { switch (code) { default: break; case BFD_RELOC_NONE: return &elf32_frv_howto_table[ (int) R_FRV_NONE]; case BFD_RELOC_32: case BFD_RELOC_CTOR: return &elf32_frv_howto_table[ (int) R_FRV_32]; case BFD_RELOC_FRV_LABEL16: return &elf32_frv_howto_table[ (int) R_FRV_LABEL16]; case BFD_RELOC_FRV_LABEL24: return &elf32_frv_howto_table[ (int) R_FRV_LABEL24]; case BFD_RELOC_FRV_LO16: return &elf32_frv_howto_table[ (int) R_FRV_LO16]; case BFD_RELOC_FRV_HI16: return &elf32_frv_howto_table[ (int) R_FRV_HI16]; case BFD_RELOC_FRV_GPREL12: return &elf32_frv_howto_table[ (int) R_FRV_GPREL12]; case BFD_RELOC_FRV_GPRELU12: return &elf32_frv_howto_table[ (int) R_FRV_GPRELU12]; case BFD_RELOC_FRV_GPREL32: return &elf32_frv_howto_table[ (int) R_FRV_GPREL32]; case BFD_RELOC_FRV_GPRELHI: return &elf32_frv_howto_table[ (int) R_FRV_GPRELHI]; case BFD_RELOC_FRV_GPRELLO: return &elf32_frv_howto_table[ (int) R_FRV_GPRELLO]; case BFD_RELOC_VTABLE_INHERIT: return &elf32_frv_vtinherit_howto; case BFD_RELOC_VTABLE_ENTRY: return &elf32_frv_vtentry_howto; } return NULL; } /* Set the howto pointer for an FRV ELF reloc. */ static void frv_info_to_howto_rela (abfd, cache_ptr, dst) bfd * abfd ATTRIBUTE_UNUSED; arelent * cache_ptr; Elf_Internal_Rela * dst; { unsigned int r_type; r_type = ELF32_R_TYPE (dst->r_info); switch (r_type) { case R_FRV_GNU_VTINHERIT: cache_ptr->howto = &elf32_frv_vtinherit_howto; break; case R_FRV_GNU_VTENTRY: cache_ptr->howto = &elf32_frv_vtentry_howto; break; default: cache_ptr->howto = & elf32_frv_howto_table [r_type]; break; } } /* Perform a single relocation. By default we use the standard BFD routines, but a few relocs, we have to do them ourselves. */ static bfd_reloc_status_type frv_final_link_relocate (howto, input_bfd, input_section, contents, rel, relocation) reloc_howto_type * howto; bfd * input_bfd; asection * input_section; bfd_byte * contents; Elf_Internal_Rela * rel; bfd_vma relocation; { return _bfd_final_link_relocate (howto, input_bfd, input_section, contents, rel->r_offset, relocation, rel->r_addend); } /* Relocate an FRV ELF section. The RELOCATE_SECTION function is called by the new ELF backend linker to handle the relocations for a section. The relocs are always passed as Rela structures; if the section actually uses Rel structures, the r_addend field will always be zero. This function is responsible for adjusting the section contents as necessary, and (if using Rela relocs and generating a relocateable output file) adjusting the reloc addend as necessary. This function does not have to worry about setting the reloc address or the reloc symbol index. LOCAL_SYMS is a pointer to the swapped in local symbols. LOCAL_SECTIONS is an array giving the section in the input file corresponding to the st_shndx field of each local symbol. The global hash table entry for the global symbols can be found via elf_sym_hashes (input_bfd). When generating relocateable output, this function must handle STB_LOCAL/STT_SECTION symbols specially. The output symbol is going to be the section symbol corresponding to the output section, which means that the addend must be adjusted accordingly. */ static boolean elf32_frv_relocate_section (output_bfd, info, input_bfd, input_section, contents, relocs, local_syms, local_sections) bfd * output_bfd ATTRIBUTE_UNUSED; struct bfd_link_info * info; bfd * input_bfd; asection * input_section; bfd_byte * contents; Elf_Internal_Rela * relocs; Elf_Internal_Sym * local_syms; asection ** local_sections; { Elf_Internal_Shdr * symtab_hdr; struct elf_link_hash_entry ** sym_hashes; Elf_Internal_Rela * rel; Elf_Internal_Rela * relend; if (info->relocateable) return true; symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; sym_hashes = elf_sym_hashes (input_bfd); relend = relocs + input_section->reloc_count; for (rel = relocs; rel < relend; rel ++) { reloc_howto_type * howto; unsigned long r_symndx; Elf_Internal_Sym * sym; asection * sec; struct elf_link_hash_entry * h; bfd_vma relocation; bfd_reloc_status_type r; const char * name = NULL; int r_type; r_type = ELF32_R_TYPE (rel->r_info); if ( r_type == R_FRV_GNU_VTINHERIT || r_type == R_FRV_GNU_VTENTRY) continue; /* This is a final link. */ r_symndx = ELF32_R_SYM (rel->r_info); howto = elf32_frv_howto_table + ELF32_R_TYPE (rel->r_info); h = NULL; sym = NULL; sec = NULL; if (r_symndx < symtab_hdr->sh_info) { sym = local_syms + r_symndx; sec = local_sections [r_symndx]; relocation = (sec->output_section->vma + sec->output_offset + sym->st_value); name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, sym->st_name); name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; } else { h = sym_hashes [r_symndx - symtab_hdr->sh_info]; while (h->root.type == bfd_link_hash_indirect || h->root.type == bfd_link_hash_warning) h = (struct elf_link_hash_entry *) h->root.u.i.link; name = h->root.root.string; if (h->root.type == bfd_link_hash_defined || h->root.type == bfd_link_hash_defweak) { sec = h->root.u.def.section; relocation = (h->root.u.def.value + sec->output_section->vma + sec->output_offset); } else if (h->root.type == bfd_link_hash_undefweak) { relocation = 0; } else { if (! ((*info->callbacks->undefined_symbol) (info, h->root.root.string, input_bfd, input_section, rel->r_offset, true))) return false; relocation = 0; } } if (r_type == R_FRV_HI16) r = elf32_frv_relocate_hi16 (input_bfd, rel, contents, relocation); else if (r_type == R_FRV_LO16) r = elf32_frv_relocate_lo16 (input_bfd, rel, contents, relocation); else if (r_type == R_FRV_LABEL24) r = elf32_frv_relocate_label24 (input_bfd, input_section, rel, contents, relocation); else if (r_type == R_FRV_GPREL12) r = elf32_frv_relocate_gprel12 (info, input_bfd, input_section, rel, contents, relocation); else if (r_type == R_FRV_GPRELU12) r = elf32_frv_relocate_gprelu12 (info, input_bfd, input_section, rel, contents, relocation); else if (r_type == R_FRV_GPRELLO) r = elf32_frv_relocate_gprello (info, input_bfd, input_section, rel, contents, relocation); else if (r_type == R_FRV_GPRELHI) r = elf32_frv_relocate_gprelhi (info, input_bfd, input_section, rel, contents, relocation); else r = frv_final_link_relocate (howto, input_bfd, input_section, contents, rel, relocation); if (r != bfd_reloc_ok) { const char * msg = (const char *) NULL; switch (r) { case bfd_reloc_overflow: r = info->callbacks->reloc_overflow (info, name, howto->name, (bfd_vma) 0, input_bfd, input_section, rel->r_offset); break; case bfd_reloc_undefined: r = info->callbacks->undefined_symbol (info, name, input_bfd, input_section, rel->r_offset, true); break; case bfd_reloc_outofrange: msg = _("internal error: out of range error"); break; case bfd_reloc_notsupported: msg = _("internal error: unsupported relocation error"); break; case bfd_reloc_dangerous: msg = _("internal error: dangerous relocation"); break; default: msg = _("internal error: unknown error"); break; } if (msg) r = info->callbacks->warning (info, msg, name, input_bfd, input_section, rel->r_offset); if (! r) return false; } } return true; } /* Return the section that should be marked against GC for a given relocation. */ static asection * elf32_frv_gc_mark_hook (sec, info, rel, h, sym) asection * sec; struct bfd_link_info * info ATTRIBUTE_UNUSED; Elf_Internal_Rela * rel; struct elf_link_hash_entry * h; Elf_Internal_Sym * sym; { if (h != NULL) { switch (ELF32_R_TYPE (rel->r_info)) { case R_FRV_GNU_VTINHERIT: case R_FRV_GNU_VTENTRY: break; default: switch (h->root.type) { default: break; case bfd_link_hash_defined: case bfd_link_hash_defweak: return h->root.u.def.section; case bfd_link_hash_common: return h->root.u.c.p->section; } } } else return bfd_section_from_elf_index (sec->owner, sym->st_shndx); return NULL; } /* Update the got entry reference counts for the section being removed. */ static boolean elf32_frv_gc_sweep_hook (abfd, info, sec, relocs) bfd * abfd ATTRIBUTE_UNUSED; struct bfd_link_info * info ATTRIBUTE_UNUSED; asection * sec ATTRIBUTE_UNUSED; const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED; { return true; } /* Hook called by the linker routine which adds symbols from an object file. We use it to put .comm items in .scomm, and not .comm. */ static boolean elf32_frv_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) bfd *abfd; struct bfd_link_info *info; const Elf_Internal_Sym *sym; const char **namep ATTRIBUTE_UNUSED; flagword *flagsp ATTRIBUTE_UNUSED; asection **secp; bfd_vma *valp; { if (sym->st_shndx == SHN_COMMON && !info->relocateable && (int)sym->st_size <= (int)bfd_get_gp_size (abfd)) { /* Common symbols less than or equal to -G nn bytes are automatically put into .sbss. */ asection *scomm = bfd_get_section_by_name (abfd, ".scommon"); if (scomm == NULL) { scomm = bfd_make_section (abfd, ".scommon"); if (scomm == NULL || !bfd_set_section_flags (abfd, scomm, (SEC_ALLOC | SEC_IS_COMMON | SEC_LINKER_CREATED))) return false; } *secp = scomm; *valp = sym->st_size; } return true; } /* Look through the relocs for a section during the first phase. Since we don't do .gots or .plts, we just need to consider the virtual table relocs for gc. */ static boolean elf32_frv_check_relocs (abfd, info, sec, relocs) bfd *abfd; struct bfd_link_info *info; asection *sec; const Elf_Internal_Rela *relocs; { Elf_Internal_Shdr *symtab_hdr; struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; const Elf_Internal_Rela *rel; const Elf_Internal_Rela *rel_end; if (info->relocateable) return true; symtab_hdr = &elf_tdata (abfd)->symtab_hdr; sym_hashes = elf_sym_hashes (abfd); sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym); if (!elf_bad_symtab (abfd)) sym_hashes_end -= symtab_hdr->sh_info; rel_end = relocs + sec->reloc_count; for (rel = relocs; rel < rel_end; rel++) { struct elf_link_hash_entry *h; unsigned long r_symndx; r_symndx = ELF32_R_SYM (rel->r_info); if (r_symndx < symtab_hdr->sh_info) h = NULL; else h = sym_hashes[r_symndx - symtab_hdr->sh_info]; switch (ELF32_R_TYPE (rel->r_info)) { /* This relocation describes the C++ object vtable hierarchy. Reconstruct it for later use during GC. */ case R_FRV_GNU_VTINHERIT: if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) return false; break; /* This relocation describes which C++ vtable entries are actually used. Record for later use during GC. */ case R_FRV_GNU_VTENTRY: if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) return false; break; } } return true; } /* Return the machine subcode from the ELF e_flags header. */ static int elf32_frv_machine (abfd) bfd *abfd; { switch (elf_elfheader (abfd)->e_flags & EF_FRV_CPU_MASK) { default: break; case EF_FRV_CPU_FR500: return bfd_mach_fr500; case EF_FRV_CPU_FR400: return bfd_mach_fr400; case EF_FRV_CPU_FR300: return bfd_mach_fr300; case EF_FRV_CPU_SIMPLE: return bfd_mach_frvsimple; case EF_FRV_CPU_TOMCAT: return bfd_mach_frvtomcat; } return bfd_mach_frv; } /* Set the right machine number for a FRV ELF file. */ static boolean elf32_frv_object_p (abfd) bfd *abfd; { bfd_default_set_arch_mach (abfd, bfd_arch_frv, elf32_frv_machine (abfd)); return true; } /* Function to set the ELF flag bits. */ static boolean frv_elf_set_private_flags (abfd, flags) bfd *abfd; flagword flags; { elf_elfheader (abfd)->e_flags = flags; elf_flags_init (abfd) = true; return true; } /* Copy backend specific data from one object module to another. */ static boolean frv_elf_copy_private_bfd_data (ibfd, obfd) bfd *ibfd; bfd *obfd; { if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour || bfd_get_flavour (obfd) != bfd_target_elf_flavour) return true; BFD_ASSERT (!elf_flags_init (obfd) || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags); elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; elf_flags_init (obfd) = true; return true; } /* Merge backend specific data from an object file to the output object file when linking. */ static boolean frv_elf_merge_private_bfd_data (ibfd, obfd) bfd *ibfd; bfd *obfd; { flagword old_flags, old_partial; flagword new_flags, new_partial; boolean error = false; char new_opt[80]; char old_opt[80]; new_opt[0] = old_opt[0] = '\0'; new_flags = elf_elfheader (ibfd)->e_flags; old_flags = elf_elfheader (obfd)->e_flags; #ifdef DEBUG (*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s", old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no", bfd_get_filename (ibfd)); #endif if (!elf_flags_init (obfd)) /* First call, no flags set. */ { elf_flags_init (obfd) = true; old_flags = new_flags; } else if (new_flags == old_flags) /* Compatible flags are ok. */ ; else /* Possibly incompatible flags. */ { /* Warn if different # of gprs are used. Note, 0 means nothing is said about the size of gprs. */ new_partial = (new_flags & EF_FRV_GPR_MASK); old_partial = (old_flags & EF_FRV_GPR_MASK); if (new_partial == old_partial) ; else if (new_partial == 0) ; else if (old_partial == 0) old_flags |= new_partial; else { switch (new_partial) { default: strcat (new_opt, " -mgpr-??"); break; case EF_FRV_GPR_32: strcat (new_opt, " -mgpr-32"); break; case EF_FRV_GPR_64: strcat (new_opt, " -mgpr-64"); break; } switch (old_partial) { default: strcat (old_opt, " -mgpr-??"); break; case EF_FRV_GPR_32: strcat (old_opt, " -mgpr-32"); break; case EF_FRV_GPR_64: strcat (old_opt, " -mgpr-64"); break; } } /* Warn if different # of fprs are used. Note, 0 means nothing is said about the size of fprs. */ new_partial = (new_flags & EF_FRV_FPR_MASK); old_partial = (old_flags & EF_FRV_FPR_MASK); if (new_partial == old_partial) ; else if (new_partial == 0) ; else if (old_partial == 0) old_flags |= new_partial; else { switch (new_partial) { default: strcat (new_opt, " -mfpr-?"); break; case EF_FRV_FPR_32: strcat (new_opt, " -mfpr-32"); break; case EF_FRV_FPR_64: strcat (new_opt, " -mfpr-64"); break; case EF_FRV_FPR_NONE: strcat (new_opt, " -msoft-float"); break; } switch (old_partial) { default: strcat (old_opt, " -mfpr-?"); break; case EF_FRV_FPR_32: strcat (old_opt, " -mfpr-32"); break; case EF_FRV_FPR_64: strcat (old_opt, " -mfpr-64"); break; case EF_FRV_FPR_NONE: strcat (old_opt, " -msoft-float"); break; } } /* Warn if different dword support was used. Note, 0 means nothing is said about the dword support. */ new_partial = (new_flags & EF_FRV_DWORD_MASK); old_partial = (old_flags & EF_FRV_DWORD_MASK); if (new_partial == old_partial) ; else if (new_partial == 0) ; else if (old_partial == 0) old_flags |= new_partial; else { switch (new_partial) { default: strcat (new_opt, " -mdword-?"); break; case EF_FRV_DWORD_YES: strcat (new_opt, " -mdword"); break; case EF_FRV_DWORD_NO: strcat (new_opt, " -mno-dword"); break; } switch (old_partial) { default: strcat (old_opt, " -mdword-?"); break; case EF_FRV_DWORD_YES: strcat (old_opt, " -mdword"); break; case EF_FRV_DWORD_NO: strcat (old_opt, " -mno-dword"); break; } } /* Or in flags that accumulate (ie, if one module uses it, mark that the feature is used. */ old_flags |= new_flags & (EF_FRV_DOUBLE | EF_FRV_MEDIA | EF_FRV_MULADD | EF_FRV_NON_PIC_RELOCS); /* If any module was compiled without -G0, clear the G0 bit. */ old_flags = ((old_flags & ~ EF_FRV_G0) | (old_flags & new_flags & EF_FRV_G0)); /* If any module was compiled without -mnopack, clear the mnopack bit. */ old_flags = ((old_flags & ~ EF_FRV_NOPACK) | (old_flags & new_flags & EF_FRV_NOPACK)); /* We don't have to do anything if the pic flags are the same, or the new module(s) were compiled with -mlibrary-pic. */ new_partial = (new_flags & EF_FRV_PIC_FLAGS); old_partial = (old_flags & EF_FRV_PIC_FLAGS); if ((new_partial == old_partial) || ((new_partial & EF_FRV_LIBPIC) != 0)) ; /* If the old module(s) were compiled with -mlibrary-pic, copy in the pic flags if any from the new module. */ else if ((old_partial & EF_FRV_LIBPIC) != 0) old_flags = (old_flags & ~ EF_FRV_PIC_FLAGS) | new_partial; /* If we have mixtures of -fpic and -fPIC, or in both bits. */ else if (new_partial != 0 && old_partial != 0) old_flags |= new_partial; /* One module was compiled for pic and the other was not, see if we have had any relocations that are not pic-safe. */ else { if ((old_flags & EF_FRV_NON_PIC_RELOCS) == 0) old_flags |= new_partial; else { old_flags &= ~ EF_FRV_PIC_FLAGS; #ifndef FRV_NO_PIC_ERROR error = true; (*_bfd_error_handler) (_("%s: compiled with %s and linked with modules that use non-pic relocations"), bfd_get_filename (ibfd), (new_flags & EF_FRV_BIGPIC) ? "-fPIC" : "-fpic"); #endif } } /* Warn if different cpu is used (allow a specific cpu to override the generic cpu). */ new_partial = (new_flags & EF_FRV_CPU_MASK); old_partial = (old_flags & EF_FRV_CPU_MASK); if (new_partial == old_partial) ; else if (new_partial == EF_FRV_CPU_GENERIC) ; else if (old_partial == EF_FRV_CPU_GENERIC) old_flags = (old_flags & ~EF_FRV_CPU_MASK) | new_partial; else { switch (new_partial) { default: strcat (new_opt, " -mcpu=?"); break; case EF_FRV_CPU_GENERIC: strcat (new_opt, " -mcpu=frv"); break; case EF_FRV_CPU_SIMPLE: strcat (new_opt, " -mcpu=simple"); break; case EF_FRV_CPU_FR500: strcat (new_opt, " -mcpu=fr500"); break; case EF_FRV_CPU_FR400: strcat (new_opt, " -mcpu=fr400"); break; case EF_FRV_CPU_FR300: strcat (new_opt, " -mcpu=fr300"); break; case EF_FRV_CPU_TOMCAT: strcat (new_opt, " -mcpu=tomcat"); break; } switch (old_partial) { default: strcat (old_opt, " -mcpu=?"); break; case EF_FRV_CPU_GENERIC: strcat (old_opt, " -mcpu=frv"); break; case EF_FRV_CPU_SIMPLE: strcat (old_opt, " -mcpu=simple"); break; case EF_FRV_CPU_FR500: strcat (old_opt, " -mcpu=fr500"); break; case EF_FRV_CPU_FR400: strcat (old_opt, " -mcpu=fr400"); break; case EF_FRV_CPU_FR300: strcat (old_opt, " -mcpu=fr300"); break; case EF_FRV_CPU_TOMCAT: strcat (old_opt, " -mcpu=tomcat"); break; } } /* Print out any mismatches from above. */ if (new_opt[0]) { error = true; (*_bfd_error_handler) (_("%s: compiled with %s and linked with modules compiled with %s"), bfd_get_filename (ibfd), new_opt, old_opt); } /* Warn about any other mismatches */ new_partial = (new_flags & ~ EF_FRV_ALL_FLAGS); old_partial = (old_flags & ~ EF_FRV_ALL_FLAGS); if (new_partial != old_partial) { old_flags |= new_partial; error = true; (*_bfd_error_handler) (_("%s: uses different unknown e_flags (0x%lx) fields than previous modules (0x%lx)"), bfd_get_filename (ibfd), (long)new_partial, (long)old_partial); } } /* If the cpu is -mcpu=simple, then set the -mnopack bit. */ if ((old_flags & EF_FRV_CPU_MASK) == EF_FRV_CPU_SIMPLE) old_flags |= EF_FRV_NOPACK; /* Update the old flags now with changes made above. */ old_partial = elf_elfheader (obfd)->e_flags & EF_FRV_CPU_MASK; elf_elfheader (obfd)->e_flags = old_flags; if (old_partial != (old_flags & EF_FRV_CPU_MASK)) bfd_default_set_arch_mach (obfd, bfd_arch_frv, elf32_frv_machine (obfd)); if (error) bfd_set_error (bfd_error_bad_value); return !error; } boolean frv_elf_print_private_bfd_data (abfd, ptr) bfd *abfd; PTR ptr; { FILE *file = (FILE *) ptr; flagword flags; BFD_ASSERT (abfd != NULL && ptr != NULL); /* Print normal ELF private data. */ _bfd_elf_print_private_bfd_data (abfd, ptr); flags = elf_elfheader (abfd)->e_flags; fprintf (file, _("private flags = 0x%lx:"), (long)flags); switch (flags & EF_FRV_CPU_MASK) { default: break; case EF_FRV_CPU_SIMPLE: fprintf (file, " -mcpu=simple"); break; case EF_FRV_CPU_FR500: fprintf (file, " -mcpu=fr500"); break; case EF_FRV_CPU_FR400: fprintf (file, " -mcpu=fr400"); break; case EF_FRV_CPU_FR300: fprintf (file, " -mcpu=fr300"); break; case EF_FRV_CPU_TOMCAT: fprintf (file, " -mcpu=tomcat"); break; } switch (flags & EF_FRV_GPR_MASK) { default: break; case EF_FRV_GPR_32: fprintf (file, " -mgpr-32"); break; case EF_FRV_GPR_64: fprintf (file, " -mgpr-64"); break; } switch (flags & EF_FRV_FPR_MASK) { default: break; case EF_FRV_FPR_32: fprintf (file, " -mfpr-32"); break; case EF_FRV_FPR_64: fprintf (file, " -mfpr-64"); break; case EF_FRV_FPR_NONE: fprintf (file, " -msoft-float"); break; } switch (flags & EF_FRV_DWORD_MASK) { default: break; case EF_FRV_DWORD_YES: fprintf (file, " -mdword"); break; case EF_FRV_DWORD_NO: fprintf (file, " -mno-dword"); break; } if (flags & EF_FRV_DOUBLE) fprintf (file, " -mdouble"); if (flags & EF_FRV_MEDIA) fprintf (file, " -mmedia"); if (flags & EF_FRV_MULADD) fprintf (file, " -mmuladd"); if (flags & EF_FRV_PIC) fprintf (file, " -fpic"); if (flags & EF_FRV_BIGPIC) fprintf (file, " -fPIC"); if (flags & EF_FRV_NON_PIC_RELOCS) fprintf (file, " non-pic relocations"); if (flags & EF_FRV_G0) fprintf (file, " -G0"); fputc ('\n', file); return true; } #define ELF_ARCH bfd_arch_frv #define ELF_MACHINE_CODE EM_CYGNUS_FRV #define ELF_MAXPAGESIZE 0x1000 #define TARGET_BIG_SYM bfd_elf32_frv_vec #define TARGET_BIG_NAME "elf32-frv" #define elf_info_to_howto_rel NULL #define elf_info_to_howto frv_info_to_howto_rela #define elf_backend_relocate_section elf32_frv_relocate_section #define elf_backend_gc_mark_hook elf32_frv_gc_mark_hook #define elf_backend_gc_sweep_hook elf32_frv_gc_sweep_hook #define elf_backend_check_relocs elf32_frv_check_relocs #define elf_backend_object_p elf32_frv_object_p #define elf_backend_add_symbol_hook elf32_frv_add_symbol_hook #define elf_backend_can_gc_sections 1 #define elf_backend_rela_normal 1 #define bfd_elf32_bfd_reloc_type_lookup frv_reloc_type_lookup #define bfd_elf32_bfd_set_private_flags frv_elf_set_private_flags #define bfd_elf32_bfd_copy_private_bfd_data frv_elf_copy_private_bfd_data #define bfd_elf32_bfd_merge_private_bfd_data frv_elf_merge_private_bfd_data #define bfd_elf32_bfd_print_private_bfd_data frv_elf_print_private_bfd_data #include "elf32-target.h"