diff options
Diffstat (limited to 'binutils-2.25/bfd/elf32-h8300.c')
| -rw-r--r-- | binutils-2.25/bfd/elf32-h8300.c | 1746 |
1 files changed, 1746 insertions, 0 deletions
diff --git a/binutils-2.25/bfd/elf32-h8300.c b/binutils-2.25/bfd/elf32-h8300.c new file mode 100644 index 00000000..67bca3f5 --- /dev/null +++ b/binutils-2.25/bfd/elf32-h8300.c @@ -0,0 +1,1746 @@ +/* BFD back-end for Renesas H8/300 ELF binaries. + Copyright 1993-2013 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 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 "libbfd.h" +#include "elf-bfd.h" +#include "elf/h8.h" + +static reloc_howto_type *elf32_h8_reloc_type_lookup + (bfd *abfd, bfd_reloc_code_real_type code); +static void elf32_h8_info_to_howto + (bfd *, arelent *, Elf_Internal_Rela *); +static void elf32_h8_info_to_howto_rel + (bfd *, arelent *, Elf_Internal_Rela *); +static unsigned long elf32_h8_mach (flagword); +static void elf32_h8_final_write_processing (bfd *, bfd_boolean); +static bfd_boolean elf32_h8_object_p (bfd *); +static bfd_boolean elf32_h8_merge_private_bfd_data (bfd *, bfd *); +static bfd_boolean elf32_h8_relax_section + (bfd *, asection *, struct bfd_link_info *, bfd_boolean *); +static bfd_boolean elf32_h8_relax_delete_bytes + (bfd *, asection *, bfd_vma, int); +static bfd_boolean elf32_h8_symbol_address_p (bfd *, asection *, bfd_vma); +static bfd_byte *elf32_h8_get_relocated_section_contents + (bfd *, struct bfd_link_info *, struct bfd_link_order *, + bfd_byte *, bfd_boolean, asymbol **); +static bfd_reloc_status_type elf32_h8_final_link_relocate + (unsigned long, bfd *, bfd *, asection *, + bfd_byte *, bfd_vma, bfd_vma, bfd_vma, + struct bfd_link_info *, asection *, int); +static bfd_boolean elf32_h8_relocate_section + (bfd *, struct bfd_link_info *, bfd *, asection *, + bfd_byte *, Elf_Internal_Rela *, + Elf_Internal_Sym *, asection **); +static bfd_reloc_status_type special + (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); + +/* This does not include any relocation information, but should be + good enough for GDB or objdump to read the file. */ + +static reloc_howto_type h8_elf_howto_table[] = +{ +#define R_H8_NONE_X 0 + HOWTO (R_H8_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 */ + special, /* special_function */ + "R_H8_NONE", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ +#define R_H8_DIR32_X (R_H8_NONE_X + 1) + HOWTO (R_H8_DIR32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + special, /* special_function */ + "R_H8_DIR32", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ +#define R_H8_DIR16_X (R_H8_DIR32_X + 1) + HOWTO (R_H8_DIR16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + special, /* special_function */ + "R_H8_DIR16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ +#define R_H8_DIR8_X (R_H8_DIR16_X + 1) + HOWTO (R_H8_DIR8, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 8, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + special, /* special_function */ + "R_H8_DIR8", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x000000ff, /* dst_mask */ + FALSE), /* pcrel_offset */ +#define R_H8_DIR16A8_X (R_H8_DIR8_X + 1) + HOWTO (R_H8_DIR16A8, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + special, /* special_function */ + "R_H8_DIR16A8", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ +#define R_H8_DIR16R8_X (R_H8_DIR16A8_X + 1) + HOWTO (R_H8_DIR16R8, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + special, /* special_function */ + "R_H8_DIR16R8", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ +#define R_H8_DIR24A8_X (R_H8_DIR16R8_X + 1) + HOWTO (R_H8_DIR24A8, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 24, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + special, /* special_function */ + "R_H8_DIR24A8", /* name */ + TRUE, /* partial_inplace */ + 0xff000000, /* src_mask */ + 0x00ffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ +#define R_H8_DIR24R8_X (R_H8_DIR24A8_X + 1) + HOWTO (R_H8_DIR24R8, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 24, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + special, /* special_function */ + "R_H8_DIR24R8", /* name */ + TRUE, /* partial_inplace */ + 0xff000000, /* src_mask */ + 0x00ffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ +#define R_H8_DIR32A16_X (R_H8_DIR24R8_X + 1) + HOWTO (R_H8_DIR32A16, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + special, /* special_function */ + "R_H8_DIR32A16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ +#define R_H8_DISP32A16_X (R_H8_DIR32A16_X + 1) + HOWTO (R_H8_DISP32A16, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + special, /* special_function */ + "R_H8_DISP32A16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ +#define R_H8_PCREL16_X (R_H8_DISP32A16_X + 1) + HOWTO (R_H8_PCREL16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed,/* complain_on_overflow */ + special, /* special_function */ + "R_H8_PCREL16", /* name */ + FALSE, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + TRUE), /* pcrel_offset */ +#define R_H8_PCREL8_X (R_H8_PCREL16_X + 1) + HOWTO (R_H8_PCREL8, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 8, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed,/* complain_on_overflow */ + special, /* special_function */ + "R_H8_PCREL8", /* name */ + FALSE, /* partial_inplace */ + 0xff, /* src_mask */ + 0xff, /* dst_mask */ + TRUE), /* pcrel_offset */ +}; + +/* This structure is used to map BFD reloc codes to H8 ELF relocs. */ + +struct elf_reloc_map { + bfd_reloc_code_real_type bfd_reloc_val; + unsigned char howto_index; +}; + +/* An array mapping BFD reloc codes to H8 ELF relocs. */ + +static const struct elf_reloc_map h8_reloc_map[] = { + { BFD_RELOC_NONE, R_H8_NONE_X }, + { BFD_RELOC_32, R_H8_DIR32_X }, + { BFD_RELOC_16, R_H8_DIR16_X }, + { BFD_RELOC_8, R_H8_DIR8_X }, + { BFD_RELOC_H8_DIR16A8, R_H8_DIR16A8_X }, + { BFD_RELOC_H8_DIR16R8, R_H8_DIR16R8_X }, + { BFD_RELOC_H8_DIR24A8, R_H8_DIR24A8_X }, + { BFD_RELOC_H8_DIR24R8, R_H8_DIR24R8_X }, + { BFD_RELOC_H8_DIR32A16, R_H8_DIR32A16_X }, + { BFD_RELOC_H8_DISP32A16, R_H8_DISP32A16_X }, + { BFD_RELOC_16_PCREL, R_H8_PCREL16_X }, + { BFD_RELOC_8_PCREL, R_H8_PCREL8_X }, +}; + + +static reloc_howto_type * +elf32_h8_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, + bfd_reloc_code_real_type code) +{ + unsigned int i; + + for (i = 0; i < sizeof (h8_reloc_map) / sizeof (struct elf_reloc_map); i++) + { + if (h8_reloc_map[i].bfd_reloc_val == code) + return &h8_elf_howto_table[(int) h8_reloc_map[i].howto_index]; + } + return NULL; +} + +static reloc_howto_type * +elf32_h8_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, + const char *r_name) +{ + unsigned int i; + + for (i = 0; + i < sizeof (h8_elf_howto_table) / sizeof (h8_elf_howto_table[0]); + i++) + if (h8_elf_howto_table[i].name != NULL + && strcasecmp (h8_elf_howto_table[i].name, r_name) == 0) + return &h8_elf_howto_table[i]; + + return NULL; +} + +static void +elf32_h8_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *bfd_reloc, + Elf_Internal_Rela *elf_reloc) +{ + unsigned int r; + unsigned int i; + + r = ELF32_R_TYPE (elf_reloc->r_info); + for (i = 0; i < sizeof (h8_elf_howto_table) / sizeof (reloc_howto_type); i++) + if (h8_elf_howto_table[i].type == r) + { + bfd_reloc->howto = &h8_elf_howto_table[i]; + return; + } + abort (); +} + +static void +elf32_h8_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, arelent *bfd_reloc, + Elf_Internal_Rela *elf_reloc ATTRIBUTE_UNUSED) +{ + unsigned int r; + + abort (); + r = ELF32_R_TYPE (elf_reloc->r_info); + bfd_reloc->howto = &h8_elf_howto_table[r]; +} + +/* Special handling for H8/300 relocs. + We only come here for pcrel stuff and return normally if not an -r link. + When doing -r, we can't do any arithmetic for the pcrel stuff, because + we support relaxing on the H8/300 series chips. */ +static bfd_reloc_status_type +special (bfd *abfd ATTRIBUTE_UNUSED, + arelent *reloc_entry ATTRIBUTE_UNUSED, + asymbol *symbol ATTRIBUTE_UNUSED, + void * data ATTRIBUTE_UNUSED, + asection *input_section ATTRIBUTE_UNUSED, + bfd *output_bfd, + char **error_message ATTRIBUTE_UNUSED) +{ + if (output_bfd == (bfd *) NULL) + return bfd_reloc_continue; + + /* Adjust the reloc address to that in the output section. */ + reloc_entry->address += input_section->output_offset; + return bfd_reloc_ok; +} + +/* Perform a relocation as part of a final link. */ +static bfd_reloc_status_type +elf32_h8_final_link_relocate (unsigned long r_type, bfd *input_bfd, + bfd *output_bfd ATTRIBUTE_UNUSED, + asection *input_section ATTRIBUTE_UNUSED, + bfd_byte *contents, bfd_vma offset, + bfd_vma value, bfd_vma addend, + struct bfd_link_info *info ATTRIBUTE_UNUSED, + asection *sym_sec ATTRIBUTE_UNUSED, + int is_local ATTRIBUTE_UNUSED) +{ + bfd_byte *hit_data = contents + offset; + + switch (r_type) + { + case R_H8_NONE: + return bfd_reloc_ok; + + case R_H8_DIR32: + case R_H8_DIR32A16: + case R_H8_DISP32A16: + case R_H8_DIR24A8: + value += addend; + bfd_put_32 (input_bfd, value, hit_data); + return bfd_reloc_ok; + + case R_H8_DIR16: + case R_H8_DIR16A8: + case R_H8_DIR16R8: + value += addend; + bfd_put_16 (input_bfd, value, hit_data); + return bfd_reloc_ok; + + /* AKA R_RELBYTE */ + case R_H8_DIR8: + value += addend; + + bfd_put_8 (input_bfd, value, hit_data); + return bfd_reloc_ok; + + case R_H8_DIR24R8: + value += addend; + + /* HIT_DATA is the address for the first byte for the relocated + value. Subtract 1 so that we can manipulate the data in 32-bit + hunks. */ + hit_data--; + + /* Clear out the top byte in value. */ + value &= 0xffffff; + + /* Retrieve the type byte for value from the section contents. */ + value |= (bfd_get_32 (input_bfd, hit_data) & 0xff000000); + + /* Now scribble it out in one 32-bit hunk. */ + bfd_put_32 (input_bfd, value, hit_data); + return bfd_reloc_ok; + + case R_H8_PCREL16: + value -= (input_section->output_section->vma + + input_section->output_offset); + value -= offset; + value += addend; + + /* The value is relative to the start of the instruction, + not the relocation offset. Subtract 2 to account for + this minor issue. */ + value -= 2; + + bfd_put_16 (input_bfd, value, hit_data); + return bfd_reloc_ok; + + case R_H8_PCREL8: + value -= (input_section->output_section->vma + + input_section->output_offset); + value -= offset; + value += addend; + + /* The value is relative to the start of the instruction, + not the relocation offset. Subtract 1 to account for + this minor issue. */ + value -= 1; + + bfd_put_8 (input_bfd, value, hit_data); + return bfd_reloc_ok; + + default: + return bfd_reloc_notsupported; + } +} + +/* Relocate an H8 ELF section. */ +static bfd_boolean +elf32_h8_relocate_section (bfd *output_bfd, 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, *relend; + + symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (input_bfd); + + rel = relocs; + relend = relocs + input_section->reloc_count; + for (; rel < relend; rel++) + { + unsigned int r_type; + unsigned long r_symndx; + Elf_Internal_Sym *sym; + asection *sec; + struct elf_link_hash_entry *h; + bfd_vma relocation; + bfd_reloc_status_type r; + arelent bfd_reloc; + reloc_howto_type *howto; + + elf32_h8_info_to_howto (input_bfd, &bfd_reloc, rel); + howto = bfd_reloc.howto; + + r_symndx = ELF32_R_SYM (rel->r_info); + r_type = 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); + } + else + { + bfd_boolean unresolved_reloc, warned; + + RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, + r_symndx, symtab_hdr, sym_hashes, + h, sec, relocation, + unresolved_reloc, warned); + } + + if (sec != NULL && discarded_section (sec)) + RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, + rel, 1, relend, howto, 0, contents); + + if (info->relocatable) + continue; + + r = elf32_h8_final_link_relocate (r_type, input_bfd, output_bfd, + input_section, + contents, rel->r_offset, + relocation, rel->r_addend, + info, sec, h == NULL); + + if (r != bfd_reloc_ok) + { + const char *name; + const char *msg = (const char *) 0; + + if (h != NULL) + name = h->root.root.string; + else + { + name = (bfd_elf_string_from_elf_section + (input_bfd, symtab_hdr->sh_link, sym->st_name)); + if (name == NULL || *name == '\0') + name = bfd_section_name (input_bfd, sec); + } + + switch (r) + { + case bfd_reloc_overflow: + if (! ((*info->callbacks->reloc_overflow) + (info, (h ? &h->root : NULL), name, howto->name, + (bfd_vma) 0, input_bfd, input_section, + rel->r_offset))) + return FALSE; + break; + + case bfd_reloc_undefined: + if (! ((*info->callbacks->undefined_symbol) + (info, name, input_bfd, input_section, + rel->r_offset, TRUE))) + return FALSE; + break; + + case bfd_reloc_outofrange: + msg = _("internal error: out of range error"); + goto common_error; + + case bfd_reloc_notsupported: + msg = _("internal error: unsupported relocation error"); + goto common_error; + + case bfd_reloc_dangerous: + msg = _("internal error: dangerous error"); + goto common_error; + + default: + msg = _("internal error: unknown error"); + /* fall through */ + + common_error: + if (!((*info->callbacks->warning) + (info, msg, name, input_bfd, input_section, + rel->r_offset))) + return FALSE; + break; + } + } + } + + return TRUE; +} + +/* Object files encode the specific H8 model they were compiled + for in the ELF flags field. + + Examine that field and return the proper BFD machine type for + the object file. */ +static unsigned long +elf32_h8_mach (flagword flags) +{ + switch (flags & EF_H8_MACH) + { + case E_H8_MACH_H8300: + default: + return bfd_mach_h8300; + + case E_H8_MACH_H8300H: + return bfd_mach_h8300h; + + case E_H8_MACH_H8300S: + return bfd_mach_h8300s; + + case E_H8_MACH_H8300HN: + return bfd_mach_h8300hn; + + case E_H8_MACH_H8300SN: + return bfd_mach_h8300sn; + + case E_H8_MACH_H8300SX: + return bfd_mach_h8300sx; + + case E_H8_MACH_H8300SXN: + return bfd_mach_h8300sxn; + } +} + +/* The final processing done just before writing out a H8 ELF object + file. We use this opportunity to encode the BFD machine type + into the flags field in the object file. */ + +static void +elf32_h8_final_write_processing (bfd *abfd, + bfd_boolean linker ATTRIBUTE_UNUSED) +{ + unsigned long val; + + switch (bfd_get_mach (abfd)) + { + default: + case bfd_mach_h8300: + val = E_H8_MACH_H8300; + break; + + case bfd_mach_h8300h: + val = E_H8_MACH_H8300H; + break; + + case bfd_mach_h8300s: + val = E_H8_MACH_H8300S; + break; + + case bfd_mach_h8300hn: + val = E_H8_MACH_H8300HN; + break; + + case bfd_mach_h8300sn: + val = E_H8_MACH_H8300SN; + break; + + case bfd_mach_h8300sx: + val = E_H8_MACH_H8300SX; + break; + + case bfd_mach_h8300sxn: + val = E_H8_MACH_H8300SXN; + break; + } + + elf_elfheader (abfd)->e_flags &= ~ (EF_H8_MACH); + elf_elfheader (abfd)->e_flags |= val; +} + +/* Return nonzero if ABFD represents a valid H8 ELF object file; also + record the encoded machine type found in the ELF flags. */ + +static bfd_boolean +elf32_h8_object_p (bfd *abfd) +{ + bfd_default_set_arch_mach (abfd, bfd_arch_h8300, + elf32_h8_mach (elf_elfheader (abfd)->e_flags)); + return TRUE; +} + +/* Merge backend specific data from an object file to the output + object file when linking. The only data we need to copy at this + time is the architecture/machine information. */ + +static bfd_boolean +elf32_h8_merge_private_bfd_data (bfd *ibfd, bfd *obfd) +{ + if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour + || bfd_get_flavour (obfd) != bfd_target_elf_flavour) + return TRUE; + + if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) + && bfd_get_mach (obfd) < bfd_get_mach (ibfd)) + { + if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), + bfd_get_mach (ibfd))) + return FALSE; + } + + return TRUE; +} + +/* This function handles relaxing for the H8.. + + There are a few relaxing opportunities available on the H8: + + jmp/jsr:24 -> bra/bsr:8 2 bytes + The jmp may be completely eliminated if the previous insn is a + conditional branch to the insn after the jump. In that case + we invert the branch and delete the jump and save 4 bytes. + + bCC:16 -> bCC:8 2 bytes + bsr:16 -> bsr:8 2 bytes + + bset:16 -> bset:8 2 bytes + bset:24/32 -> bset:8 4 bytes + (also applicable to other bit manipulation instructions) + + mov.b:16 -> mov.b:8 2 bytes + mov.b:24/32 -> mov.b:8 4 bytes + + bset:24/32 -> bset:16 2 bytes + (also applicable to other bit manipulation instructions) + + mov.[bwl]:24/32 -> mov.[bwl]:16 2 bytes + + mov.[bwl] @(displ:24/32+ERx) -> mov.[bwl] @(displ:16+ERx) 4 bytes. */ + +static bfd_boolean +elf32_h8_relax_section (bfd *abfd, asection *sec, + struct bfd_link_info *link_info, bfd_boolean *again) +{ + Elf_Internal_Shdr *symtab_hdr; + Elf_Internal_Rela *internal_relocs; + Elf_Internal_Rela *irel, *irelend; + bfd_byte *contents = NULL; + Elf_Internal_Sym *isymbuf = NULL; + static asection *last_input_section = NULL; + static Elf_Internal_Rela *last_reloc = NULL; + + /* Assume nothing changes. */ + *again = FALSE; + + /* We don't have to do anything for a relocatable link, if + this section does not have relocs, or if this is not a + code section. */ + if (link_info->relocatable + || (sec->flags & SEC_RELOC) == 0 + || sec->reloc_count == 0 + || (sec->flags & SEC_CODE) == 0) + return TRUE; + + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + + /* Get a copy of the native relocations. */ + internal_relocs = (_bfd_elf_link_read_relocs + (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, + link_info->keep_memory)); + if (internal_relocs == NULL) + goto error_return; + + if (sec != last_input_section) + last_reloc = NULL; + + last_input_section = sec; + + /* Walk through the relocs looking for relaxing opportunities. */ + irelend = internal_relocs + sec->reloc_count; + for (irel = internal_relocs; irel < irelend; irel++) + { + bfd_vma symval; + + { + arelent bfd_reloc; + + elf32_h8_info_to_howto (abfd, &bfd_reloc, irel); + } + /* Keep track of the previous reloc so that we can delete + some long jumps created by the compiler. */ + if (irel != internal_relocs) + last_reloc = irel - 1; + + switch(ELF32_R_TYPE (irel->r_info)) + { + case R_H8_DIR24R8: + case R_H8_PCREL16: + case R_H8_DIR16A8: + case R_H8_DIR24A8: + case R_H8_DIR32A16: + case R_H8_DISP32A16: + break; + default: + continue; + } + + /* Get the section contents if we haven't done so already. */ + if (contents == NULL) + { + /* Get cached copy if it exists. */ + if (elf_section_data (sec)->this_hdr.contents != NULL) + contents = elf_section_data (sec)->this_hdr.contents; + else + { + /* Go get them off disk. */ + if (!bfd_malloc_and_get_section (abfd, sec, &contents)) + goto error_return; + } + } + + /* Read this BFD's local symbols if we haven't done so already. */ + if (isymbuf == NULL && symtab_hdr->sh_info != 0) + { + isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; + if (isymbuf == NULL) + isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, + symtab_hdr->sh_info, 0, + NULL, NULL, NULL); + if (isymbuf == NULL) + goto error_return; + } + + /* Get the value of the symbol referred to by the reloc. */ + if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) + { + /* A local symbol. */ + Elf_Internal_Sym *isym; + asection *sym_sec; + + isym = isymbuf + ELF32_R_SYM (irel->r_info); + sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); + symval = isym->st_value; + /* If the reloc is absolute, it will not have + a symbol or section associated with it. */ + if (sym_sec) + symval += sym_sec->output_section->vma + + sym_sec->output_offset; + } + else + { + unsigned long indx; + struct elf_link_hash_entry *h; + + /* An external symbol. */ + indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; + h = elf_sym_hashes (abfd)[indx]; + BFD_ASSERT (h != NULL); + if (h->root.type != bfd_link_hash_defined + && h->root.type != bfd_link_hash_defweak) + { + /* This appears to be a reference to an undefined + symbol. Just ignore it--it will be caught by the + regular reloc processing. */ + continue; + } + + symval = (h->root.u.def.value + + h->root.u.def.section->output_section->vma + + h->root.u.def.section->output_offset); + } + + /* For simplicity of coding, we are going to modify the section + contents, the section relocs, and the BFD symbol table. We + must tell the rest of the code not to free up this + information. It would be possible to instead create a table + of changes which have to be made, as is done in coff-mips.c; + that would be more work, but would require less memory when + the linker is run. */ + switch (ELF32_R_TYPE (irel->r_info)) + { + /* Try to turn a 24-bit absolute branch/call into an 8-bit + pc-relative branch/call. */ + case R_H8_DIR24R8: + { + bfd_vma value = symval + irel->r_addend; + bfd_vma dot, gap; + + /* Get the address of this instruction. */ + dot = (sec->output_section->vma + + sec->output_offset + irel->r_offset - 1); + + /* Compute the distance from this insn to the branch target. */ + gap = value - dot; + + /* If the distance is within -126..+130 inclusive, then we can + relax this jump. +130 is valid since the target will move + two bytes closer if we do relax this branch. */ + if ((int) gap >= -126 && (int) gap <= 130) + { + unsigned char code; + + /* Note that we've changed the relocs, section contents, + etc. */ + elf_section_data (sec)->relocs = internal_relocs; + elf_section_data (sec)->this_hdr.contents = contents; + symtab_hdr->contents = (unsigned char *) isymbuf; + + /* Get the instruction code being relaxed. */ + code = bfd_get_8 (abfd, contents + irel->r_offset - 1); + + /* If the previous instruction conditionally jumped around + this instruction, we may be able to reverse the condition + and redirect the previous instruction to the target of + this instruction. + + Such sequences are used by the compiler to deal with + long conditional branches. + + Only perform this optimisation for jumps (code 0x5a) not + subroutine calls, as otherwise it could transform: + + mov.w r0,r0 + beq .L1 + jsr @_bar + .L1: rts + _bar: rts + into: + mov.w r0,r0 + bne _bar + rts + _bar: rts + + which changes the call (jsr) into a branch (bne). */ + if (code == 0x5a /* jmp24. */ + && (int) gap <= 130 + && (int) gap >= -128 + && last_reloc + && ELF32_R_TYPE (last_reloc->r_info) == R_H8_PCREL8 + && ELF32_R_SYM (last_reloc->r_info) < symtab_hdr->sh_info) + { + bfd_vma last_value; + asection *last_sym_sec; + Elf_Internal_Sym *last_sym; + + /* We will need to examine the symbol used by the + previous relocation. */ + + last_sym = isymbuf + ELF32_R_SYM (last_reloc->r_info); + last_sym_sec + = bfd_section_from_elf_index (abfd, last_sym->st_shndx); + last_value = (last_sym->st_value + + last_sym_sec->output_section->vma + + last_sym_sec->output_offset); + + /* Verify that the previous relocation was for a + branch around this instruction and that no symbol + exists at the current location. */ + if (last_value == dot + 4 + && last_reloc->r_offset + 2 == irel->r_offset + && ! elf32_h8_symbol_address_p (abfd, sec, dot)) + { + /* We can eliminate this jump. Twiddle the + previous relocation as necessary. */ + irel->r_info + = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), + ELF32_R_TYPE (R_H8_NONE)); + + last_reloc->r_info + = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), + ELF32_R_TYPE (R_H8_PCREL8)); + last_reloc->r_addend = irel->r_addend; + + code = bfd_get_8 (abfd, + contents + last_reloc->r_offset - 1); + code ^= 1; + bfd_put_8 (abfd, + code, + contents + last_reloc->r_offset - 1); + + /* Delete four bytes of data. */ + if (!elf32_h8_relax_delete_bytes (abfd, sec, + irel->r_offset - 1, + 4)) + goto error_return; + + *again = TRUE; + break; + } + } + + if (code == 0x5e) + /* This is jsr24 */ + bfd_put_8 (abfd, 0x55, contents + irel->r_offset - 1); /* bsr8. */ + else if (code == 0x5a) + /* This is jmp24 */ + bfd_put_8 (abfd, 0x40, contents + irel->r_offset - 1); /* bra8. */ + else + abort (); + + /* Fix the relocation's type. */ + irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), + R_H8_PCREL8); + + /* Delete two bytes of data. */ + if (!elf32_h8_relax_delete_bytes (abfd, sec, + irel->r_offset + 1, 2)) + goto error_return; + + /* That will change things, so, we should relax again. + Note that this is not required, and it may be slow. */ + *again = TRUE; + } + break; + } + + /* Try to turn a 16-bit pc-relative branch into a 8-bit pc-relative + branch. */ + case R_H8_PCREL16: + { + bfd_vma value = symval + irel->r_addend; + bfd_vma dot; + bfd_vma gap; + + /* Get the address of this instruction. */ + dot = (sec->output_section->vma + + sec->output_offset + + irel->r_offset - 2); + + gap = value - dot; + + /* If the distance is within -126..+130 inclusive, then we can + relax this jump. +130 is valid since the target will move + two bytes closer if we do relax this branch. */ + if ((int) gap >= -126 && (int) gap <= 130) + { + unsigned char code; + + /* Note that we've changed the relocs, section contents, + etc. */ + elf_section_data (sec)->relocs = internal_relocs; + elf_section_data (sec)->this_hdr.contents = contents; + symtab_hdr->contents = (unsigned char *) isymbuf; + + /* Get the opcode. */ + code = bfd_get_8 (abfd, contents + irel->r_offset - 2); + + if (code == 0x58) + { + /* bCC:16 -> bCC:8 */ + /* Get the second byte of the original insn, which + contains the condition code. */ + code = bfd_get_8 (abfd, contents + irel->r_offset - 1); + + /* Compute the first byte of the relaxed + instruction. The original sequence 0x58 0xX0 + is relaxed to 0x4X, where X represents the + condition code. */ + code &= 0xf0; + code >>= 4; + code |= 0x40; + bfd_put_8 (abfd, code, contents + irel->r_offset - 2); /* bCC:8. */ + } + else if (code == 0x5c) /* bsr16. */ + /* This is bsr. */ + bfd_put_8 (abfd, 0x55, contents + irel->r_offset - 2); /* bsr8. */ + else + /* Might be MOVSD. */ + break; + + /* Fix the relocation's type. */ + irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), + R_H8_PCREL8); + irel->r_offset--; + + /* Delete two bytes of data. */ + if (!elf32_h8_relax_delete_bytes (abfd, sec, + irel->r_offset + 1, 2)) + goto error_return; + + /* That will change things, so, we should relax again. + Note that this is not required, and it may be slow. */ + *again = TRUE; + } + break; + } + + /* This is a 16-bit absolute address in one of the following + instructions: + + "band", "bclr", "biand", "bild", "bior", "bist", "bixor", + "bld", "bnot", "bor", "bset", "bst", "btst", "bxor", and + "mov.b" + + We may relax this into an 8-bit absolute address if it's in + the right range. */ + case R_H8_DIR16A8: + { + bfd_vma value; + + value = bfd_h8300_pad_address (abfd, symval + irel->r_addend); + if (value >= 0xffffff00u) + { + unsigned char code; + unsigned char temp_code; + + /* Note that we've changed the relocs, section contents, + etc. */ + elf_section_data (sec)->relocs = internal_relocs; + elf_section_data (sec)->this_hdr.contents = contents; + symtab_hdr->contents = (unsigned char *) isymbuf; + + /* Get the opcode. */ + code = bfd_get_8 (abfd, contents + irel->r_offset - 2); + + /* All instructions with R_H8_DIR16A8 start with + 0x6a. */ + if (code != 0x6a) + abort (); + + temp_code = code = bfd_get_8 (abfd, contents + irel->r_offset - 1); + /* If this is a mov.b instruction, clear the lower + nibble, which contains the source/destination + register number. */ + if ((temp_code & 0x10) != 0x10) + temp_code &= 0xf0; + + switch (temp_code) + { + case 0x00: + /* This is mov.b @aa:16,Rd. */ + bfd_put_8 (abfd, (code & 0xf) | 0x20, + contents + irel->r_offset - 2); + break; + case 0x80: + /* This is mov.b Rs,@aa:16. */ + bfd_put_8 (abfd, (code & 0xf) | 0x30, + contents + irel->r_offset - 2); + break; + case 0x18: + /* This is a bit-maniputation instruction that + stores one bit into memory, one of "bclr", + "bist", "bnot", "bset", and "bst". */ + bfd_put_8 (abfd, 0x7f, contents + irel->r_offset - 2); + break; + case 0x10: + /* This is a bit-maniputation instruction that + loads one bit from memory, one of "band", + "biand", "bild", "bior", "bixor", "bld", "bor", + "btst", and "bxor". */ + bfd_put_8 (abfd, 0x7e, contents + irel->r_offset - 2); + break; + default: + abort (); + } + + /* Fix the relocation's type. */ + irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), + R_H8_DIR8); + + /* Move the relocation. */ + irel->r_offset--; + + /* Delete two bytes of data. */ + if (!elf32_h8_relax_delete_bytes (abfd, sec, + irel->r_offset + 1, 2)) + goto error_return; + + /* That will change things, so, we should relax again. + Note that this is not required, and it may be slow. */ + *again = TRUE; + } + break; + } + + /* This is a 24-bit absolute address in one of the following + instructions: + + "band", "bclr", "biand", "bild", "bior", "bist", "bixor", + "bld", "bnot", "bor", "bset", "bst", "btst", "bxor", and + "mov.b" + + We may relax this into an 8-bit absolute address if it's in + the right range. */ + case R_H8_DIR24A8: + { + bfd_vma value; + + value = bfd_h8300_pad_address (abfd, symval + irel->r_addend); + if (value >= 0xffffff00u) + { + unsigned char code; + unsigned char temp_code; + + /* Note that we've changed the relocs, section contents, + etc. */ + elf_section_data (sec)->relocs = internal_relocs; + elf_section_data (sec)->this_hdr.contents = contents; + symtab_hdr->contents = (unsigned char *) isymbuf; + + /* Get the opcode. */ + code = bfd_get_8 (abfd, contents + irel->r_offset - 2); + + /* All instructions with R_H8_DIR24A8 start with + 0x6a. */ + if (code != 0x6a) + abort (); + + temp_code = code = bfd_get_8 (abfd, contents + irel->r_offset - 1); + + /* If this is a mov.b instruction, clear the lower + nibble, which contains the source/destination + register number. */ + if ((temp_code & 0x30) != 0x30) + temp_code &= 0xf0; + + switch (temp_code) + { + case 0x20: + /* This is mov.b @aa:24/32,Rd. */ + bfd_put_8 (abfd, (code & 0xf) | 0x20, + contents + irel->r_offset - 2); + break; + case 0xa0: + /* This is mov.b Rs,@aa:24/32. */ + bfd_put_8 (abfd, (code & 0xf) | 0x30, + contents + irel->r_offset - 2); + break; + case 0x38: + /* This is a bit-maniputation instruction that + stores one bit into memory, one of "bclr", + "bist", "bnot", "bset", and "bst". */ + bfd_put_8 (abfd, 0x7f, contents + irel->r_offset - 2); + break; + case 0x30: + /* This is a bit-maniputation instruction that + loads one bit from memory, one of "band", + "biand", "bild", "bior", "bixor", "bld", "bor", + "btst", and "bxor". */ + bfd_put_8 (abfd, 0x7e, contents + irel->r_offset - 2); + break; + default: + abort(); + } + + /* Fix the relocation's type. */ + irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), + R_H8_DIR8); + irel->r_offset--; + + /* Delete four bytes of data. */ + if (!elf32_h8_relax_delete_bytes (abfd, sec, + irel->r_offset + 1, 4)) + goto error_return; + + /* That will change things, so, we should relax again. + Note that this is not required, and it may be slow. */ + *again = TRUE; + break; + } + } + + /* Fall through. */ + + /* This is a 24-/32-bit absolute address in one of the + following instructions: + + "band", "bclr", "biand", "bild", "bior", "bist", + "bixor", "bld", "bnot", "bor", "bset", "bst", "btst", + "bxor", "ldc.w", "stc.w" and "mov.[bwl]" + + We may relax this into an 16-bit absolute address if it's + in the right range. */ + case R_H8_DIR32A16: + { + bfd_vma value; + + value = bfd_h8300_pad_address (abfd, symval + irel->r_addend); + if (value <= 0x7fff || value >= 0xffff8000u) + { + unsigned char code; + unsigned char op0, op1, op2, op3; + unsigned char *op_ptr; + + /* Note that we've changed the relocs, section contents, + etc. */ + elf_section_data (sec)->relocs = internal_relocs; + elf_section_data (sec)->this_hdr.contents = contents; + symtab_hdr->contents = (unsigned char *) isymbuf; + + if (irel->r_offset >= 4) + { + /* Check for 4-byte MOVA relaxation (SH-specific). */ + int second_reloc = 0; + + op_ptr = contents + irel->r_offset - 4; + + if (last_reloc) + { + arelent bfd_reloc; + reloc_howto_type *h; + bfd_vma last_reloc_size; + + elf32_h8_info_to_howto (abfd, &bfd_reloc, last_reloc); + h = bfd_reloc.howto; + last_reloc_size = 1 << h->size; + if (last_reloc->r_offset + last_reloc_size + == irel->r_offset) + { + op_ptr -= last_reloc_size; + second_reloc = 1; + } + } + + if (irel + 1 < irelend) + { + Elf_Internal_Rela *next_reloc = irel + 1; + arelent bfd_reloc; + reloc_howto_type *h; + bfd_vma next_reloc_size; + + elf32_h8_info_to_howto (abfd, &bfd_reloc, next_reloc); + h = bfd_reloc.howto; + next_reloc_size = 1 << h->size; + if (next_reloc->r_offset + next_reloc_size + == irel->r_offset) + { + op_ptr -= next_reloc_size; + second_reloc = 1; + } + } + + op0 = bfd_get_8 (abfd, op_ptr + 0); + op1 = bfd_get_8 (abfd, op_ptr + 1); + op2 = bfd_get_8 (abfd, op_ptr + 2); + op3 = bfd_get_8 (abfd, op_ptr + 3); + + if (op0 == 0x01 + && (op1 & 0xdf) == 0x5f + && (op2 & 0x40) == 0x40 + && (op3 & 0x80) == 0x80) + { + if ((op2 & 0x08) == 0) + second_reloc = 1; + + if (second_reloc) + { + op3 &= ~0x08; + bfd_put_8 (abfd, op3, op_ptr + 3); + } + else + { + op2 &= ~0x08; + bfd_put_8 (abfd, op2, op_ptr + 2); + } + goto r_h8_dir32a16_common; + } + } + + /* Now check for short version of MOVA. (SH-specific) */ + op_ptr = contents + irel->r_offset - 2; + op0 = bfd_get_8 (abfd, op_ptr + 0); + op1 = bfd_get_8 (abfd, op_ptr + 1); + + if (op0 == 0x7a + && (op1 & 0x88) == 0x80) + { + op1 |= 0x08; + bfd_put_8 (abfd, op1, op_ptr + 1); + goto r_h8_dir32a16_common; + } + + /* Get the opcode. */ + code = bfd_get_8 (abfd, contents + irel->r_offset - 1); + + /* Fix the opcode. For all the instructions that + belong to this relaxation, we simply need to turn + off bit 0x20 in the previous byte. */ + code &= ~0x20; + + bfd_put_8 (abfd, code, contents + irel->r_offset - 1); + + r_h8_dir32a16_common: + /* Fix the relocation's type. */ + irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), + R_H8_DIR16); + + /* Delete two bytes of data. */ + if (!elf32_h8_relax_delete_bytes (abfd, sec, + irel->r_offset + 1, 2)) + goto error_return; + + /* That will change things, so, we should relax again. + Note that this is not required, and it may be slow. */ + *again = TRUE; + } + break; /* case R_H8_DIR32A16 */ + } + + case R_H8_DISP32A16: + /* mov.[bwl] @(displ:24/32+ERx) -> mov.[bwl] @(displ:16+ERx) 4 bytes + It is assured that instruction uses at least 4 bytes opcode before + reloc entry addressing mode "register indirect with displacement" + relaxing options (all saving 4 bytes): + 0x78 0sss0000 0x6A 0010dddd disp:32 mov.b @(d:32,ERs),Rd -> + 0x6E 0sssdddd disp:16 mov.b @(d:16,ERs),Rd + 0x78 0sss0000 0x6B 0010dddd disp:32 mov.w @(d:32,ERs),Rd -> + 0x6F 0sssdddd disp:16 mov.w @(d:16,ERs),Rd + 0x01 0x00 0x78 0sss0000 0x6B 00100ddd disp:32 mov.l @(d:32,ERs),ERd -> + 0x01 0x00 0x6F 0sss0ddd disp:16 mov.l @(d:16,ERs),ERd + + 0x78 0ddd0000 0x6A 1010ssss disp:32 mov.b Rs,@(d:32,ERd) -> + 0x6E 1dddssss disp:16 mov.b Rs,@(d:16,ERd) + 0x78 0ddd0000 0x6B 1010ssss disp:32 mov.w Rs,@(d:32,ERd) -> + 0x6F 1dddssss disp:16 mov.w Rs,@(d:16,ERd) + 0x01 0x00 0x78 xddd0000 0x6B 10100sss disp:32 mov.l ERs,@(d:32,ERd) -> + 0x01 0x00 0x6F 1ddd0sss disp:16 mov.l ERs,@(d:16,ERd) + mov.l prefix 0x01 0x00 can be left as is and mov.l handled same + as mov.w/ */ + { + bfd_vma value; + + value = bfd_h8300_pad_address (abfd, symval + irel->r_addend); + if (value <= 0x7fff || value >= 0xffff8000u) + { + unsigned char op0, op1, op2, op3, op0n, op1n; + int relax = 0; + + /* Note that we've changed the relocs, section contents, + etc. */ + elf_section_data (sec)->relocs = internal_relocs; + elf_section_data (sec)->this_hdr.contents = contents; + symtab_hdr->contents = (unsigned char *) isymbuf; + + if (irel->r_offset >= 4) + { + op0 = bfd_get_8 (abfd, contents + irel->r_offset - 4); + op1 = bfd_get_8 (abfd, contents + irel->r_offset - 3); + op2 = bfd_get_8 (abfd, contents + irel->r_offset - 2); + op3 = bfd_get_8 (abfd, contents + irel->r_offset - 1); + + if (op0 == 0x78) + { + switch(op2) + { + case 0x6A: + if ((op1 & 0x8F) == 0x00 && (op3 & 0x70) == 0x20) + { + /* mov.b. */ + op0n = 0x6E; + relax = 1; + } + break; + case 0x6B: + if ((op1 & 0x0F) == 0x00 && (op3 & 0x70) == 0x20) + { + /* mov.w/l. */ + op0n = 0x6F; + relax = 1; + } + break; + default: + break; + } + } + } + + if (relax) + { + op1n = (op3 & 0x8F) | (op1 & 0x70); + bfd_put_8 (abfd, op0n, contents + irel->r_offset - 4); + bfd_put_8 (abfd, op1n, contents + irel->r_offset - 3); + + /* Fix the relocation's type. */ + irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_H8_DIR16); + irel->r_offset -= 2; + + /* Delete four bytes of data. */ + if (!elf32_h8_relax_delete_bytes (abfd, sec, irel->r_offset + 2, 4)) + goto error_return; + + /* That will change things, so, we should relax again. + Note that this is not required, and it may be slow. */ + *again = TRUE; + } + } + } + break; + + default: + break; + } + } + + if (isymbuf != NULL + && symtab_hdr->contents != (unsigned char *) isymbuf) + { + if (! link_info->keep_memory) + free (isymbuf); + else + symtab_hdr->contents = (unsigned char *) isymbuf; + } + + if (contents != NULL + && elf_section_data (sec)->this_hdr.contents != contents) + { + if (! link_info->keep_memory) + free (contents); + else + { + /* Cache the section contents for elf_link_input_bfd. */ + elf_section_data (sec)->this_hdr.contents = contents; + } + } + + if (internal_relocs != NULL + && elf_section_data (sec)->relocs != internal_relocs) + free (internal_relocs); + + return TRUE; + + error_return: + if (isymbuf != NULL + && symtab_hdr->contents != (unsigned char *) isymbuf) + free (isymbuf); + if (contents != NULL + && elf_section_data (sec)->this_hdr.contents != contents) + free (contents); + if (internal_relocs != NULL + && elf_section_data (sec)->relocs != internal_relocs) + free (internal_relocs); + return FALSE; +} + +/* Delete some bytes from a section while relaxing. */ + +static bfd_boolean +elf32_h8_relax_delete_bytes (bfd *abfd, asection *sec, bfd_vma addr, int count) +{ + Elf_Internal_Shdr *symtab_hdr; + unsigned int sec_shndx; + bfd_byte *contents; + Elf_Internal_Rela *irel, *irelend; + Elf_Internal_Sym *isym; + Elf_Internal_Sym *isymend; + bfd_vma toaddr; + struct elf_link_hash_entry **sym_hashes; + struct elf_link_hash_entry **end_hashes; + unsigned int symcount; + + sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); + + contents = elf_section_data (sec)->this_hdr.contents; + + toaddr = sec->size; + + irel = elf_section_data (sec)->relocs; + irelend = irel + sec->reloc_count; + + /* Actually delete the bytes. */ + memmove (contents + addr, contents + addr + count, + (size_t) (toaddr - addr - count)); + sec->size -= count; + + /* Adjust all the relocs. */ + for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) + { + /* Get the new reloc address. */ + if ((irel->r_offset > addr + && irel->r_offset <= toaddr)) + irel->r_offset -= count; + } + + /* Adjust the local symbols defined in this section. */ + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + isym = (Elf_Internal_Sym *) symtab_hdr->contents; + isymend = isym + symtab_hdr->sh_info; + for (; isym < isymend; isym++) + { + if (isym->st_shndx == sec_shndx + && isym->st_value > addr + && isym->st_value <= toaddr) + isym->st_value -= count; + } + + /* Now adjust the global symbols defined in this section. */ + symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) + - symtab_hdr->sh_info); + sym_hashes = elf_sym_hashes (abfd); + end_hashes = sym_hashes + symcount; + for (; sym_hashes < end_hashes; sym_hashes++) + { + struct elf_link_hash_entry *sym_hash = *sym_hashes; + + if ((sym_hash->root.type == bfd_link_hash_defined + || sym_hash->root.type == bfd_link_hash_defweak) + && sym_hash->root.u.def.section == sec + && sym_hash->root.u.def.value > addr + && sym_hash->root.u.def.value <= toaddr) + sym_hash->root.u.def.value -= count; + } + + return TRUE; +} + +/* Return TRUE if a symbol exists at the given address, else return + FALSE. */ +static bfd_boolean +elf32_h8_symbol_address_p (bfd *abfd, asection *sec, bfd_vma addr) +{ + Elf_Internal_Shdr *symtab_hdr; + unsigned int sec_shndx; + Elf_Internal_Sym *isym; + Elf_Internal_Sym *isymend; + struct elf_link_hash_entry **sym_hashes; + struct elf_link_hash_entry **end_hashes; + unsigned int symcount; + + sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); + + /* Examine all the symbols. */ + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + isym = (Elf_Internal_Sym *) symtab_hdr->contents; + isymend = isym + symtab_hdr->sh_info; + for (; isym < isymend; isym++) + { + if (isym->st_shndx == sec_shndx + && isym->st_value == addr) + return TRUE; + } + + symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) + - symtab_hdr->sh_info); + sym_hashes = elf_sym_hashes (abfd); + end_hashes = sym_hashes + symcount; + for (; sym_hashes < end_hashes; sym_hashes++) + { + struct elf_link_hash_entry *sym_hash = *sym_hashes; + if ((sym_hash->root.type == bfd_link_hash_defined + || sym_hash->root.type == bfd_link_hash_defweak) + && sym_hash->root.u.def.section == sec + && sym_hash->root.u.def.value == addr) + return TRUE; + } + + return FALSE; +} + +/* This is a version of bfd_generic_get_relocated_section_contents + which uses elf32_h8_relocate_section. */ + +static bfd_byte * +elf32_h8_get_relocated_section_contents (bfd *output_bfd, + struct bfd_link_info *link_info, + struct bfd_link_order *link_order, + bfd_byte *data, + bfd_boolean relocatable, + asymbol **symbols) +{ + Elf_Internal_Shdr *symtab_hdr; + asection *input_section = link_order->u.indirect.section; + bfd *input_bfd = input_section->owner; + asection **sections = NULL; + Elf_Internal_Rela *internal_relocs = NULL; + Elf_Internal_Sym *isymbuf = NULL; + + /* We only need to handle the case of relaxing, or of having a + particular set of section contents, specially. */ + if (relocatable + || elf_section_data (input_section)->this_hdr.contents == NULL) + return bfd_generic_get_relocated_section_contents (output_bfd, link_info, + link_order, data, + relocatable, + symbols); + + symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; + + memcpy (data, elf_section_data (input_section)->this_hdr.contents, + (size_t) input_section->size); + + if ((input_section->flags & SEC_RELOC) != 0 + && input_section->reloc_count > 0) + { + asection **secpp; + Elf_Internal_Sym *isym, *isymend; + bfd_size_type amt; + + internal_relocs = (_bfd_elf_link_read_relocs + (input_bfd, input_section, NULL, + (Elf_Internal_Rela *) NULL, FALSE)); + if (internal_relocs == NULL) + goto error_return; + + if (symtab_hdr->sh_info != 0) + { + isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; + if (isymbuf == NULL) + isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, + symtab_hdr->sh_info, 0, + NULL, NULL, NULL); + if (isymbuf == NULL) + goto error_return; + } + + amt = symtab_hdr->sh_info; + amt *= sizeof (asection *); + sections = (asection **) bfd_malloc (amt); + if (sections == NULL && amt != 0) + goto error_return; + + isymend = isymbuf + symtab_hdr->sh_info; + for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp) + { + asection *isec; + + if (isym->st_shndx == SHN_UNDEF) + isec = bfd_und_section_ptr; + else if (isym->st_shndx == SHN_ABS) + isec = bfd_abs_section_ptr; + else if (isym->st_shndx == SHN_COMMON) + isec = bfd_com_section_ptr; + else + isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); + + *secpp = isec; + } + + if (! elf32_h8_relocate_section (output_bfd, link_info, input_bfd, + input_section, data, internal_relocs, + isymbuf, sections)) + goto error_return; + + if (sections != NULL) + free (sections); + if (isymbuf != NULL + && symtab_hdr->contents != (unsigned char *) isymbuf) + free (isymbuf); + if (elf_section_data (input_section)->relocs != internal_relocs) + free (internal_relocs); + } + + return data; + + error_return: + if (sections != NULL) + free (sections); + if (isymbuf != NULL + && symtab_hdr->contents != (unsigned char *) isymbuf) + free (isymbuf); + if (internal_relocs != NULL + && elf_section_data (input_section)->relocs != internal_relocs) + free (internal_relocs); + return NULL; +} + + +#define TARGET_BIG_SYM bfd_elf32_h8300_vec +#define TARGET_BIG_NAME "elf32-h8300" +#define ELF_ARCH bfd_arch_h8300 +#define ELF_MACHINE_CODE EM_H8_300 +#define ELF_MAXPAGESIZE 0x1 +#define bfd_elf32_bfd_reloc_type_lookup elf32_h8_reloc_type_lookup +#define bfd_elf32_bfd_reloc_name_lookup elf32_h8_reloc_name_lookup +#define elf_info_to_howto elf32_h8_info_to_howto +#define elf_info_to_howto_rel elf32_h8_info_to_howto_rel + +/* So we can set/examine bits in e_flags to get the specific + H8 architecture in use. */ +#define elf_backend_final_write_processing \ + elf32_h8_final_write_processing +#define elf_backend_object_p \ + elf32_h8_object_p +#define bfd_elf32_bfd_merge_private_bfd_data \ + elf32_h8_merge_private_bfd_data + +/* ??? when elf_backend_relocate_section is not defined, elf32-target.h + defaults to using _bfd_generic_link_hash_table_create, but + bfd_elf_size_dynamic_sections uses + dynobj = elf_hash_table (info)->dynobj; + and thus requires an elf hash table. */ +#define bfd_elf32_bfd_link_hash_table_create _bfd_elf_link_hash_table_create + +/* Use an H8 specific linker, not the ELF generic linker. */ +#define elf_backend_relocate_section elf32_h8_relocate_section +#define elf_backend_rela_normal 1 +#define elf_backend_can_gc_sections 1 + +/* And relaxing stuff. */ +#define bfd_elf32_bfd_relax_section elf32_h8_relax_section +#define bfd_elf32_bfd_get_relocated_section_contents \ + elf32_h8_get_relocated_section_contents + +#define elf_symbol_leading_char '_' + +#include "elf32-target.h" |