/* AVR-specific support for 32-bit ELF Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc. Contributed by Denis Chertykov 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/avr.h" static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); static void avr_info_to_howto_rela PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); static asection *elf32_avr_gc_mark_hook PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, struct elf_link_hash_entry *, Elf_Internal_Sym *)); static boolean elf32_avr_gc_sweep_hook PARAMS ((bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *)); static boolean elf32_avr_check_relocs PARAMS ((bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *)); static bfd_reloc_status_type avr_final_link_relocate PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, bfd_vma)); static boolean elf32_avr_relocate_section PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); static void bfd_elf_avr_final_write_processing PARAMS ((bfd *, boolean)); static boolean elf32_avr_object_p PARAMS ((bfd *)); /* Use RELA instead of REL */ #undef USE_REL static reloc_howto_type elf_avr_howto_table[] = { HOWTO (R_AVR_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_AVR_NONE", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ false), /* pcrel_offset */ HOWTO (R_AVR_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_AVR_32", /* name */ false, /* partial_inplace */ 0xffffffff, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ /* A 7 bit PC relative relocation. */ HOWTO (R_AVR_7_PCREL, /* type */ 1, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 7, /* bitsize */ true, /* pc_relative */ 3, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_AVR_7_PCREL", /* name */ false, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ true), /* pcrel_offset */ /* A 13 bit PC relative relocation. */ HOWTO (R_AVR_13_PCREL, /* type */ 1, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 13, /* bitsize */ true, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_AVR_13_PCREL", /* name */ false, /* partial_inplace */ 0xfff, /* src_mask */ 0xfff, /* dst_mask */ true), /* pcrel_offset */ /* A 16 bit absolute relocation. */ HOWTO (R_AVR_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_AVR_16", /* name */ false, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* A 16 bit absolute relocation for command address. */ HOWTO (R_AVR_16_PM, /* type */ 1, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_AVR_16_PM", /* name */ false, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* A low 8 bit absolute relocation of 16 bit address. For LDI command. */ HOWTO (R_AVR_LO8_LDI, /* type */ 0, /* rightshift */ 1, /* 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_AVR_LO8_LDI", /* name */ false, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* A high 8 bit absolute relocation of 16 bit address. For LDI command. */ HOWTO (R_AVR_HI8_LDI, /* type */ 8, /* rightshift */ 1, /* 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_AVR_HI8_LDI", /* name */ false, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* A high 6 bit absolute relocation of 22 bit address. For LDI command. */ HOWTO (R_AVR_HH8_LDI, /* type */ 16, /* rightshift */ 1, /* 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_AVR_HH8_LDI", /* name */ false, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* A negative low 8 bit absolute relocation of 16 bit address. For LDI command. */ HOWTO (R_AVR_LO8_LDI_NEG, /* type */ 0, /* rightshift */ 1, /* 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_AVR_LO8_LDI_NEG", /* name */ false, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* A hegative high 8 bit absolute relocation of 16 bit address. For LDI command. */ HOWTO (R_AVR_HI8_LDI_NEG, /* type */ 8, /* rightshift */ 1, /* 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_AVR_HI8_LDI_NEG", /* name */ false, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* A hegative high 6 bit absolute relocation of 22 bit address. For LDI command. */ HOWTO (R_AVR_HH8_LDI_NEG, /* type */ 16, /* rightshift */ 1, /* 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_AVR_HH8_LDI_NEG", /* name */ false, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* A low 8 bit absolute relocation of 24 bit program memory address. For LDI command. */ HOWTO (R_AVR_LO8_LDI_PM, /* type */ 1, /* rightshift */ 1, /* 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_AVR_LO8_LDI_PM", /* name */ false, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* A high 8 bit absolute relocation of 16 bit program memory address. For LDI command. */ HOWTO (R_AVR_HI8_LDI_PM, /* type */ 9, /* rightshift */ 1, /* 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_AVR_HI8_LDI_PM", /* name */ false, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* A high 8 bit absolute relocation of 24 bit program memory address. For LDI command. */ HOWTO (R_AVR_HH8_LDI_PM, /* type */ 17, /* rightshift */ 1, /* 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_AVR_HH8_LDI_PM", /* name */ false, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* A low 8 bit absolute relocation of a negative 24 bit program memory address. For LDI command. */ HOWTO (R_AVR_LO8_LDI_PM_NEG, /* type */ 1, /* rightshift */ 1, /* 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_AVR_LO8_LDI_PM_NEG", /* name */ false, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* A high 8 bit absolute relocation of a negative 16 bit program memory address. For LDI command. */ HOWTO (R_AVR_HI8_LDI_PM_NEG, /* type */ 9, /* rightshift */ 1, /* 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_AVR_HI8_LDI_PM_NEG", /* name */ false, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* A high 8 bit absolute relocation of a negative 24 bit program memory address. For LDI command. */ HOWTO (R_AVR_HH8_LDI_PM_NEG, /* type */ 17, /* rightshift */ 1, /* 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_AVR_HH8_LDI_PM_NEG", /* name */ false, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* Relocation for CALL command in ATmega. */ HOWTO (R_AVR_CALL, /* type */ 1, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 23, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_AVR_CALL", /* name */ false, /* partial_inplace */ 0xffffffff, /* src_mask */ 0xffffffff, /* dst_mask */ false) /* pcrel_offset */ }; /* Map BFD reloc types to AVR ELF reloc types. */ struct avr_reloc_map { bfd_reloc_code_real_type bfd_reloc_val; unsigned int elf_reloc_val; }; static const struct avr_reloc_map avr_reloc_map[] = { { BFD_RELOC_NONE, R_AVR_NONE }, { BFD_RELOC_32, R_AVR_32 }, { BFD_RELOC_AVR_7_PCREL, R_AVR_7_PCREL }, { BFD_RELOC_AVR_13_PCREL, R_AVR_13_PCREL }, { BFD_RELOC_16, R_AVR_16 }, { BFD_RELOC_AVR_16_PM, R_AVR_16_PM }, { BFD_RELOC_AVR_LO8_LDI, R_AVR_LO8_LDI}, { BFD_RELOC_AVR_HI8_LDI, R_AVR_HI8_LDI }, { BFD_RELOC_AVR_HH8_LDI, R_AVR_HH8_LDI }, { BFD_RELOC_AVR_LO8_LDI_NEG, R_AVR_LO8_LDI_NEG }, { BFD_RELOC_AVR_HI8_LDI_NEG, R_AVR_HI8_LDI_NEG }, { BFD_RELOC_AVR_HH8_LDI_NEG, R_AVR_HH8_LDI_NEG }, { BFD_RELOC_AVR_LO8_LDI_PM, R_AVR_LO8_LDI_PM }, { BFD_RELOC_AVR_HI8_LDI_PM, R_AVR_HI8_LDI_PM }, { BFD_RELOC_AVR_HH8_LDI_PM, R_AVR_HH8_LDI_PM }, { BFD_RELOC_AVR_LO8_LDI_PM_NEG, R_AVR_LO8_LDI_PM_NEG }, { BFD_RELOC_AVR_HI8_LDI_PM_NEG, R_AVR_HI8_LDI_PM_NEG }, { BFD_RELOC_AVR_HH8_LDI_PM_NEG, R_AVR_HH8_LDI_PM_NEG }, { BFD_RELOC_AVR_CALL, R_AVR_CALL } }; static reloc_howto_type * bfd_elf32_bfd_reloc_type_lookup (abfd, code) bfd *abfd ATTRIBUTE_UNUSED; bfd_reloc_code_real_type code; { unsigned int i; for (i = 0; i < sizeof (avr_reloc_map) / sizeof (struct avr_reloc_map); i++) { if (avr_reloc_map[i].bfd_reloc_val == code) return &elf_avr_howto_table[avr_reloc_map[i].elf_reloc_val]; } return NULL; } /* Set the howto pointer for an AVR ELF reloc. */ static void avr_info_to_howto_rela (abfd, cache_ptr, dst) bfd *abfd ATTRIBUTE_UNUSED; arelent *cache_ptr; Elf32_Internal_Rela *dst; { unsigned int r_type; r_type = ELF32_R_TYPE (dst->r_info); BFD_ASSERT (r_type < (unsigned int) R_AVR_max); cache_ptr->howto = &elf_avr_howto_table[r_type]; } static asection * elf32_avr_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)) { default: switch (h->root.type) { 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; default: break; } } } else return bfd_section_from_elf_index (sec->owner, sym->st_shndx); return NULL; } static boolean elf32_avr_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; { /* We don't use got and plt entries for avr. */ 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_avr_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]; } return true; } /* 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 avr_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; { bfd_reloc_status_type r = bfd_reloc_ok; bfd_vma x; bfd_signed_vma srel; switch (howto->type) { case R_AVR_7_PCREL: contents += rel->r_offset; srel = (bfd_signed_vma) relocation; srel += rel->r_addend; srel -= rel->r_offset; srel -= 2; /* Branch instructions add 2 to the PC... */ srel -= (input_section->output_section->vma + input_section->output_offset); if (srel & 1) return bfd_reloc_outofrange; if (srel > ((1 << 7) - 1) || (srel < - (1 << 7))) return bfd_reloc_overflow; x = bfd_get_16 (input_bfd, contents); x = (x & 0xfc07) | (((srel >> 1) << 3) & 0x3f8); bfd_put_16 (input_bfd, x, contents); break; case R_AVR_13_PCREL: contents += rel->r_offset; srel = (bfd_signed_vma) relocation; srel += rel->r_addend; srel -= rel->r_offset; srel -= 2; /* Branch instructions add 2 to the PC... */ srel -= (input_section->output_section->vma + input_section->output_offset); if (srel & 1) return bfd_reloc_outofrange; /* AVR addresses commands as words. */ srel >>= 1; /* Check for overflow. */ if (srel < -2048 || srel > 2047) { /* Apply WRAPAROUND if possible. */ switch (bfd_get_mach (input_bfd)) { case bfd_mach_avr2: case bfd_mach_avr4: break; default: return bfd_reloc_overflow; } } x = bfd_get_16 (input_bfd, contents); x = (x & 0xf000) | (srel & 0xfff); bfd_put_16 (input_bfd, x, contents); break; case R_AVR_LO8_LDI: contents += rel->r_offset; srel = (bfd_signed_vma) relocation + rel->r_addend; x = bfd_get_16 (input_bfd, contents); x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); bfd_put_16 (input_bfd, x, contents); break; case R_AVR_HI8_LDI: contents += rel->r_offset; srel = (bfd_signed_vma) relocation + rel->r_addend; srel = (srel >> 8) & 0xff; x = bfd_get_16 (input_bfd, contents); x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); bfd_put_16 (input_bfd, x, contents); break; case R_AVR_HH8_LDI: contents += rel->r_offset; srel = (bfd_signed_vma) relocation + rel->r_addend; srel = (srel >> 16) & 0xff; x = bfd_get_16 (input_bfd, contents); x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); bfd_put_16 (input_bfd, x, contents); break; case R_AVR_LO8_LDI_NEG: contents += rel->r_offset; srel = (bfd_signed_vma) relocation + rel->r_addend; srel = -srel; x = bfd_get_16 (input_bfd, contents); x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); bfd_put_16 (input_bfd, x, contents); break; case R_AVR_HI8_LDI_NEG: contents += rel->r_offset; srel = (bfd_signed_vma) relocation + rel->r_addend; srel = -srel; srel = (srel >> 8) & 0xff; x = bfd_get_16 (input_bfd, contents); x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); bfd_put_16 (input_bfd, x, contents); break; case R_AVR_HH8_LDI_NEG: contents += rel->r_offset; srel = (bfd_signed_vma) relocation + rel->r_addend; srel = -srel; srel = (srel >> 16) & 0xff; x = bfd_get_16 (input_bfd, contents); x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); bfd_put_16 (input_bfd, x, contents); break; case R_AVR_LO8_LDI_PM: contents += rel->r_offset; srel = (bfd_signed_vma) relocation + rel->r_addend; if (srel & 1) return bfd_reloc_outofrange; srel = srel >> 1; x = bfd_get_16 (input_bfd, contents); x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); bfd_put_16 (input_bfd, x, contents); break; case R_AVR_HI8_LDI_PM: contents += rel->r_offset; srel = (bfd_signed_vma) relocation + rel->r_addend; if (srel & 1) return bfd_reloc_outofrange; srel = srel >> 1; srel = (srel >> 8) & 0xff; x = bfd_get_16 (input_bfd, contents); x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); bfd_put_16 (input_bfd, x, contents); break; case R_AVR_HH8_LDI_PM: contents += rel->r_offset; srel = (bfd_signed_vma) relocation + rel->r_addend; if (srel & 1) return bfd_reloc_outofrange; srel = srel >> 1; srel = (srel >> 16) & 0xff; x = bfd_get_16 (input_bfd, contents); x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); bfd_put_16 (input_bfd, x, contents); break; case R_AVR_LO8_LDI_PM_NEG: contents += rel->r_offset; srel = (bfd_signed_vma) relocation + rel->r_addend; srel = -srel; if (srel & 1) return bfd_reloc_outofrange; srel = srel >> 1; x = bfd_get_16 (input_bfd, contents); x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); bfd_put_16 (input_bfd, x, contents); break; case R_AVR_HI8_LDI_PM_NEG: contents += rel->r_offset; srel = (bfd_signed_vma) relocation + rel->r_addend; srel = -srel; if (srel & 1) return bfd_reloc_outofrange; srel = srel >> 1; srel = (srel >> 8) & 0xff; x = bfd_get_16 (input_bfd, contents); x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); bfd_put_16 (input_bfd, x, contents); break; case R_AVR_HH8_LDI_PM_NEG: contents += rel->r_offset; srel = (bfd_signed_vma) relocation + rel->r_addend; srel = -srel; if (srel & 1) return bfd_reloc_outofrange; srel = srel >> 1; srel = (srel >> 16) & 0xff; x = bfd_get_16 (input_bfd, contents); x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); bfd_put_16 (input_bfd, x, contents); break; case R_AVR_CALL: contents += rel->r_offset; srel = (bfd_signed_vma) relocation + rel->r_addend; if (srel & 1) return bfd_reloc_outofrange; srel = srel >> 1; x = bfd_get_16 (input_bfd, contents); x |= ((srel & 0x10000) | ((srel << 3) & 0x1f00000)) >> 16; bfd_put_16 (input_bfd, x, contents); bfd_put_16 (input_bfd, (bfd_vma) srel & 0xffff, contents+2); break; default: r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents, rel->r_offset, relocation, rel->r_addend); } return r; } /* Relocate an AVR ELF section. */ static boolean elf32_avr_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; 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); r_symndx = ELF32_R_SYM (rel->r_info); if (info->relocateable) { /* This is a relocateable link. We don't have to change anything, unless the reloc is against a section symbol, in which case we have to adjust according to where the section symbol winds up in the output section. */ if (r_symndx < symtab_hdr->sh_info) { sym = local_syms + r_symndx; if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) { sec = local_sections [r_symndx]; rel->r_addend += sec->output_offset + sym->st_value; } } continue; } /* This is a final link. */ howto = elf_avr_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 = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); 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; } } r = avr_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; } /* The final processing done just before writing out a AVR ELF object file. This gets the AVR architecture right based on the machine number. */ static void bfd_elf_avr_final_write_processing (abfd, linker) bfd *abfd; boolean linker ATTRIBUTE_UNUSED; { unsigned long val; switch (bfd_get_mach (abfd)) { default: case bfd_mach_avr2: val = E_AVR_MACH_AVR2; break; case bfd_mach_avr1: val = E_AVR_MACH_AVR1; break; case bfd_mach_avr3: val = E_AVR_MACH_AVR3; break; case bfd_mach_avr4: val = E_AVR_MACH_AVR4; break; case bfd_mach_avr5: val = E_AVR_MACH_AVR5; break; } elf_elfheader (abfd)->e_machine = EM_AVR; elf_elfheader (abfd)->e_flags &= ~ EF_AVR_MACH; elf_elfheader (abfd)->e_flags |= val; } /* Set the right machine number. */ static boolean elf32_avr_object_p (abfd) bfd *abfd; { unsigned int e_set = bfd_mach_avr2; if (elf_elfheader (abfd)->e_machine == EM_AVR || elf_elfheader (abfd)->e_machine == EM_AVR_OLD) { int e_mach = elf_elfheader (abfd)->e_flags & EF_AVR_MACH; switch (e_mach) { default: case E_AVR_MACH_AVR2: e_set = bfd_mach_avr2; break; case E_AVR_MACH_AVR1: e_set = bfd_mach_avr1; break; case E_AVR_MACH_AVR3: e_set = bfd_mach_avr3; break; case E_AVR_MACH_AVR4: e_set = bfd_mach_avr4; break; case E_AVR_MACH_AVR5: e_set = bfd_mach_avr5; break; } } return bfd_default_set_arch_mach (abfd, bfd_arch_avr, e_set); } #define ELF_ARCH bfd_arch_avr #define ELF_MACHINE_CODE EM_AVR #define ELF_MACHINE_ALT1 EM_AVR_OLD #define ELF_MAXPAGESIZE 1 #define TARGET_LITTLE_SYM bfd_elf32_avr_vec #define TARGET_LITTLE_NAME "elf32-avr" #define elf_info_to_howto avr_info_to_howto_rela #define elf_info_to_howto_rel NULL #define elf_backend_relocate_section elf32_avr_relocate_section #define elf_backend_gc_mark_hook elf32_avr_gc_mark_hook #define elf_backend_gc_sweep_hook elf32_avr_gc_sweep_hook #define elf_backend_check_relocs elf32_avr_check_relocs #define elf_backend_can_gc_sections 1 #define elf_backend_final_write_processing \ bfd_elf_avr_final_write_processing #define elf_backend_object_p elf32_avr_object_p #include "elf32-target.h"