diff options
Diffstat (limited to 'binutils-2.17/bfd/elf32-crx.c')
| -rw-r--r-- | binutils-2.17/bfd/elf32-crx.c | 1356 |
1 files changed, 0 insertions, 1356 deletions
diff --git a/binutils-2.17/bfd/elf32-crx.c b/binutils-2.17/bfd/elf32-crx.c deleted file mode 100644 index 0a49885a..00000000 --- a/binutils-2.17/bfd/elf32-crx.c +++ /dev/null @@ -1,1356 +0,0 @@ -/* BFD back-end for National Semiconductor's CRX ELF - Copyright 2004 Free Software Foundation, Inc. - Written by Tomer Levi, NSC, Israel. - - 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ - -#include "bfd.h" -#include "sysdep.h" -#include "bfdlink.h" -#include "libbfd.h" -#include "elf-bfd.h" -#include "elf/crx.h" - -static reloc_howto_type *elf_crx_reloc_type_lookup - (bfd *, bfd_reloc_code_real_type); -static void elf_crx_info_to_howto - (bfd *, arelent *, Elf_Internal_Rela *); -static bfd_boolean elf32_crx_relax_delete_bytes - (struct bfd_link_info *, bfd *, asection *, bfd_vma, int); -static bfd_reloc_status_type crx_elf_final_link_relocate - (reloc_howto_type *, bfd *, bfd *, asection *, - bfd_byte *, bfd_vma, bfd_vma, bfd_vma, - struct bfd_link_info *, asection *, int); -static bfd_boolean elf32_crx_relocate_section - (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, - Elf_Internal_Rela *, Elf_Internal_Sym *, asection **); -static asection * elf32_crx_gc_mark_hook - (asection *, struct bfd_link_info *, Elf_Internal_Rela *, - struct elf_link_hash_entry *, Elf_Internal_Sym *); -static bfd_boolean elf32_crx_gc_sweep_hook - (bfd *, struct bfd_link_info *, asection *, - const Elf_Internal_Rela *); -static bfd_boolean elf32_crx_relax_section - (bfd *, asection *, struct bfd_link_info *, bfd_boolean *); -static bfd_byte * elf32_crx_get_relocated_section_contents - (bfd *, struct bfd_link_info *, struct bfd_link_order *, - bfd_byte *, bfd_boolean, asymbol **); - -/* crx_reloc_map array maps BFD relocation enum into a CRGAS relocation type. */ - -struct crx_reloc_map -{ - bfd_reloc_code_real_type bfd_reloc_enum; /* BFD relocation enum. */ - unsigned short crx_reloc_type; /* CRX relocation type. */ -}; - -static const struct crx_reloc_map crx_reloc_map[R_CRX_MAX] = -{ - {BFD_RELOC_NONE, R_CRX_NONE}, - {BFD_RELOC_CRX_REL4, R_CRX_REL4}, - {BFD_RELOC_CRX_REL8, R_CRX_REL8}, - {BFD_RELOC_CRX_REL8_CMP, R_CRX_REL8_CMP}, - {BFD_RELOC_CRX_REL16, R_CRX_REL16}, - {BFD_RELOC_CRX_REL24, R_CRX_REL24}, - {BFD_RELOC_CRX_REL32, R_CRX_REL32}, - {BFD_RELOC_CRX_REGREL12, R_CRX_REGREL12}, - {BFD_RELOC_CRX_REGREL22, R_CRX_REGREL22}, - {BFD_RELOC_CRX_REGREL28, R_CRX_REGREL28}, - {BFD_RELOC_CRX_REGREL32, R_CRX_REGREL32}, - {BFD_RELOC_CRX_ABS16, R_CRX_ABS16}, - {BFD_RELOC_CRX_ABS32, R_CRX_ABS32}, - {BFD_RELOC_CRX_NUM8, R_CRX_NUM8}, - {BFD_RELOC_CRX_NUM16, R_CRX_NUM16}, - {BFD_RELOC_CRX_NUM32, R_CRX_NUM32}, - {BFD_RELOC_CRX_IMM16, R_CRX_IMM16}, - {BFD_RELOC_CRX_IMM32, R_CRX_IMM32}, - {BFD_RELOC_CRX_SWITCH8, R_CRX_SWITCH8}, - {BFD_RELOC_CRX_SWITCH16, R_CRX_SWITCH16}, - {BFD_RELOC_CRX_SWITCH32, R_CRX_SWITCH32} -}; - -static reloc_howto_type crx_elf_howto_table[] = -{ - HOWTO (R_CRX_NONE, /* type */ - 0, /* rightshift */ - 2, /* size */ - 32, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont,/* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_CRX_NONE", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_CRX_REL4, /* type */ - 1, /* rightshift */ - 0, /* size */ - 4, /* bitsize */ - TRUE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield,/* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_CRX_REL4", /* name */ - FALSE, /* partial_inplace */ - 0xf, /* src_mask */ - 0xf, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_CRX_REL8, /* type */ - 1, /* rightshift */ - 0, /* size */ - 8, /* bitsize */ - TRUE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield,/* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_CRX_REL8", /* name */ - FALSE, /* partial_inplace */ - 0xff, /* src_mask */ - 0xff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_CRX_REL8_CMP, /* type */ - 1, /* rightshift */ - 0, /* size */ - 8, /* bitsize */ - TRUE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield,/* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_CRX_REL8_CMP", /* name */ - FALSE, /* partial_inplace */ - 0xff, /* src_mask */ - 0xff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_CRX_REL16, /* type */ - 1, /* rightshift */ - 1, /* size */ - 16, /* bitsize */ - TRUE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield,/* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_CRX_REL16", /* name */ - FALSE, /* partial_inplace */ - 0xffff, /* src_mask */ - 0xffff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_CRX_REL24, /* type */ - 1, /* rightshift */ - 2, /* size */ - 24, /* bitsize */ - TRUE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield,/* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_CRX_REL24", /* name */ - FALSE, /* partial_inplace */ - 0xffffff, /* src_mask */ - 0xffffff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_CRX_REL32, /* type */ - 1, /* rightshift */ - 2, /* size */ - 32, /* bitsize */ - TRUE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield,/* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_CRX_REL32", /* name */ - FALSE, /* partial_inplace */ - 0xffffffff, /* src_mask */ - 0xffffffff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_CRX_REGREL12, /* type */ - 0, /* rightshift */ - 1, /* size */ - 12, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield,/* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_CRX_REGREL12", /* name */ - FALSE, /* partial_inplace */ - 0xfff, /* src_mask */ - 0xfff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_CRX_REGREL22, /* type */ - 0, /* rightshift */ - 2, /* size */ - 22, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield,/* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_CRX_REGREL22", /* name */ - FALSE, /* partial_inplace */ - 0x3fffff, /* src_mask */ - 0x3fffff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_CRX_REGREL28, /* type */ - 0, /* rightshift */ - 2, /* size */ - 28, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield,/* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_CRX_REGREL28", /* name */ - FALSE, /* partial_inplace */ - 0xfffffff, /* src_mask */ - 0xfffffff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_CRX_REGREL32, /* type */ - 0, /* rightshift */ - 2, /* size */ - 32, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield,/* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_CRX_REGREL32", /* name */ - FALSE, /* partial_inplace */ - 0xffffffff, /* src_mask */ - 0xffffffff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_CRX_ABS16, /* type */ - 0, /* rightshift */ - 1, /* size */ - 16, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield,/* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_CRX_ABS16", /* name */ - FALSE, /* partial_inplace */ - 0xffff, /* src_mask */ - 0xffff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_CRX_ABS32, /* type */ - 0, /* rightshift */ - 2, /* size */ - 32, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield,/* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_CRX_ABS32", /* name */ - FALSE, /* partial_inplace */ - 0xffffffff, /* src_mask */ - 0xffffffff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_CRX_NUM8, /* type */ - 0, /* rightshift */ - 0, /* size */ - 8, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield,/* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_CRX_NUM8", /* name */ - FALSE, /* partial_inplace */ - 0xff, /* src_mask */ - 0xff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_CRX_NUM16, /* type */ - 0, /* rightshift */ - 1, /* size */ - 16, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield,/* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_CRX_NUM16", /* name */ - FALSE, /* partial_inplace */ - 0xffff, /* src_mask */ - 0xffff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_CRX_NUM32, /* type */ - 0, /* rightshift */ - 2, /* size */ - 32, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield,/* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_CRX_NUM32", /* name */ - FALSE, /* partial_inplace */ - 0xffffffff, /* src_mask */ - 0xffffffff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_CRX_IMM16, /* type */ - 0, /* rightshift */ - 1, /* size */ - 16, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield,/* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_CRX_IMM16", /* name */ - FALSE, /* partial_inplace */ - 0xffff, /* src_mask */ - 0xffff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO (R_CRX_IMM32, /* type */ - 0, /* rightshift */ - 2, /* size */ - 32, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield,/* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_CRX_IMM32", /* name */ - FALSE, /* partial_inplace */ - 0xffffffff, /* src_mask */ - 0xffffffff, /* dst_mask */ - FALSE), /* pcrel_offset */ - - /* An 8 bit switch table entry. This is generated for an expression - such as ``.byte L1 - L2''. The offset holds the difference - between the reloc address and L2. */ - HOWTO (R_CRX_SWITCH8, /* type */ - 0, /* rightshift */ - 0, /* size (0 = byte, 1 = short, 2 = long) */ - 8, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_unsigned, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_CRX_SWITCH8", /* name */ - FALSE, /* partial_inplace */ - 0xff, /* src_mask */ - 0xff, /* dst_mask */ - TRUE), /* pcrel_offset */ - - /* A 16 bit switch table entry. This is generated for an expression - such as ``.word L1 - L2''. The offset holds the difference - between the reloc address and L2. */ - HOWTO (R_CRX_SWITCH16, /* type */ - 0, /* rightshift */ - 1, /* size (0 = byte, 1 = short, 2 = long) */ - 16, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_unsigned, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_CRX_SWITCH16", /* name */ - FALSE, /* partial_inplace */ - 0xffff, /* src_mask */ - 0xffff, /* dst_mask */ - TRUE), /* pcrel_offset */ - - /* A 32 bit switch table entry. This is generated for an expression - such as ``.long L1 - L2''. The offset holds the difference - between the reloc address and L2. */ - HOWTO (R_CRX_SWITCH32, /* type */ - 0, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 32, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_unsigned, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_CRX_SWITCH32", /* name */ - FALSE, /* partial_inplace */ - 0xffffffff, /* src_mask */ - 0xffffffff, /* dst_mask */ - TRUE) /* pcrel_offset */ -}; - -/* Retrieve a howto ptr using a BFD reloc_code. */ - -static reloc_howto_type * -elf_crx_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, - bfd_reloc_code_real_type code) -{ - unsigned int i; - - for (i = 0; i < R_CRX_MAX; i++) - if (code == crx_reloc_map[i].bfd_reloc_enum) - return &crx_elf_howto_table[crx_reloc_map[i].crx_reloc_type]; - - printf ("This relocation Type is not supported -0x%x\n", code); - return 0; -} - -/* Retrieve a howto ptr using an internal relocation entry. */ - -static void -elf_crx_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, - Elf_Internal_Rela *dst) -{ - unsigned int r_type = ELF32_R_TYPE (dst->r_info); - BFD_ASSERT (r_type < (unsigned int) R_CRX_MAX); - cache_ptr->howto = &crx_elf_howto_table[r_type]; -} - -/* Perform a relocation as part of a final link. */ - -static bfd_reloc_status_type -crx_elf_final_link_relocate (reloc_howto_type *howto, bfd *input_bfd, - bfd *output_bfd ATTRIBUTE_UNUSED, - asection *input_section, bfd_byte *contents, - bfd_vma offset, bfd_vma Rvalue, bfd_vma addend, - struct bfd_link_info *info ATTRIBUTE_UNUSED, - asection *sec ATTRIBUTE_UNUSED, - int is_local ATTRIBUTE_UNUSED) -{ - unsigned short r_type = howto->type; - bfd_byte *hit_data = contents + offset; - bfd_vma reloc_bits, check; - - switch (r_type) - { - case R_CRX_IMM16: - case R_CRX_IMM32: - case R_CRX_ABS16: - case R_CRX_ABS32: - case R_CRX_REL8_CMP: - case R_CRX_REL16: - case R_CRX_REL24: - case R_CRX_REL32: - case R_CRX_REGREL12: - case R_CRX_REGREL22: - case R_CRX_REGREL28: - case R_CRX_REGREL32: - /* 'hit_data' is relative to the start of the instruction, not the - relocation offset. Advance it to account for the exact offset. */ - hit_data += 2; - break; - - case R_CRX_REL4: - /* This relocation type is used only in 'Branch if Equal to 0' - instructions and requires special handling. */ - Rvalue -= 1; - break; - - case R_CRX_NONE: - return bfd_reloc_ok; - break; - - case R_CRX_SWITCH8: - case R_CRX_SWITCH16: - case R_CRX_SWITCH32: - /* We only care about the addend, where the difference between - expressions is kept. */ - Rvalue = 0; - - default: - break; - } - - if (howto->pc_relative) - { - /* Subtract the address of the section containing the location. */ - Rvalue -= (input_section->output_section->vma - + input_section->output_offset); - /* Subtract the position of the location within the section. */ - Rvalue -= offset; - } - - /* Add in supplied addend. */ - Rvalue += addend; - - /* Complain if the bitfield overflows, whether it is considered - as signed or unsigned. */ - check = Rvalue >> howto->rightshift; - - /* Assumes two's complement. This expression avoids - overflow if howto->bitsize is the number of bits in - bfd_vma. */ - reloc_bits = (((1 << (howto->bitsize - 1)) - 1) << 1) | 1; - - if (((bfd_vma) check & ~reloc_bits) != 0 - && (((bfd_vma) check & ~reloc_bits) - != (-(bfd_vma) 1 & ~reloc_bits))) - { - /* The above right shift is incorrect for a signed - value. See if turning on the upper bits fixes the - overflow. */ - if (howto->rightshift && (bfd_signed_vma) Rvalue < 0) - { - check |= ((bfd_vma) - 1 - & ~((bfd_vma) - 1 - >> howto->rightshift)); - if (((bfd_vma) check & ~reloc_bits) - != (-(bfd_vma) 1 & ~reloc_bits)) - return bfd_reloc_overflow; - } - else - return bfd_reloc_overflow; - } - - /* Drop unwanted bits from the value we are relocating to. */ - Rvalue >>= (bfd_vma) howto->rightshift; - - /* Apply dst_mask to select only relocatable part of the insn. */ - Rvalue &= howto->dst_mask; - - switch (howto->size) - { - case 0: - if (r_type == R_CRX_REL4) - { - Rvalue <<= 4; - Rvalue |= (bfd_get_8 (input_bfd, hit_data) & 0x0f); - } - - bfd_put_8 (input_bfd, (unsigned char) Rvalue, hit_data); - break; - - case 1: - if (r_type == R_CRX_REGREL12) - Rvalue |= (bfd_get_16 (input_bfd, hit_data) & 0xf000); - - bfd_put_16 (input_bfd, Rvalue, hit_data); - break; - - case 2: - if (r_type == R_CRX_REL24 - || r_type == R_CRX_REGREL22 - || r_type == R_CRX_REGREL28) - Rvalue |= (((bfd_get_16 (input_bfd, hit_data) << 16) | - bfd_get_16 (input_bfd, hit_data + 2)) & ~howto->dst_mask); - - if (r_type == R_CRX_NUM32 || r_type == R_CRX_SWITCH32) - /* Relocation on DATA is purely little-endian, that is, for a - multi-byte datum, the lowest address in memory contains the - little end of the datum, that is, the least significant byte. - Therefore we use BFD's byte Putting functions. */ - bfd_put_32 (input_bfd, Rvalue, hit_data); - else - /* Relocation on INSTRUCTIONS is different : Instructions are - word-addressable, that is, each word itself is arranged according - to little-endian convention, whereas the words are arranged with - respect to one another in BIG ENDIAN fashion. - When there is an immediate value that spans a word boundary, it is - split in a big-endian way with respect to the words. */ - { - bfd_put_16 (input_bfd, (Rvalue >> 16) & 0xffff, hit_data); - bfd_put_16 (input_bfd, Rvalue & 0xffff, hit_data + 2); - } - break; - - default: - return bfd_reloc_notsupported; - } - - return bfd_reloc_ok; -} - -/* Delete some bytes from a section while relaxing. */ - -static bfd_boolean -elf32_crx_relax_delete_bytes (struct bfd_link_info *link_info, 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_Rela *irelalign; - bfd_vma toaddr; - Elf_Internal_Sym *isym; - Elf_Internal_Sym *isymend; - struct elf_link_hash_entry **sym_hashes; - struct elf_link_hash_entry **end_hashes; - struct elf_link_hash_entry **start_hashes; - unsigned int symcount; - - sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); - - contents = elf_section_data (sec)->this_hdr.contents; - - /* The deletion must stop at the next ALIGN reloc for an aligment - power larger than the number of bytes we are deleting. */ - - irelalign = NULL; - 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; - for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) - { - if (isym->st_shndx == sec_shndx - && isym->st_value > addr - && isym->st_value < toaddr) - { - /* Adjust the addend of SWITCH relocations in this section, - which reference this local symbol. */ - for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) - { - unsigned long r_symndx; - Elf_Internal_Sym *rsym; - bfd_vma addsym, subsym; - - /* Skip if not a SWITCH relocation. */ - if (ELF32_R_TYPE (irel->r_info) != (int) R_CRX_SWITCH8 - && ELF32_R_TYPE (irel->r_info) != (int) R_CRX_SWITCH16 - && ELF32_R_TYPE (irel->r_info) != (int) R_CRX_SWITCH32) - continue; - - r_symndx = ELF32_R_SYM (irel->r_info); - rsym = (Elf_Internal_Sym *) symtab_hdr->contents + r_symndx; - - /* Skip if not the local adjusted symbol. */ - if (rsym != isym) - continue; - - addsym = isym->st_value; - subsym = addsym - irel->r_addend; - - /* Fix the addend only when -->> (addsym > addr >= subsym). */ - if (subsym <= addr) - irel->r_addend -= count; - else - continue; - } - - 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 = start_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; - - /* The '--wrap SYMBOL' option is causing a pain when the object file, - containing the definition of __wrap_SYMBOL, includes a direct - call to SYMBOL as well. Since both __wrap_SYMBOL and SYMBOL reference - the same symbol (which is __wrap_SYMBOL), but still exist as two - different symbols in 'sym_hashes', we don't want to adjust - the global symbol __wrap_SYMBOL twice. - This check is only relevant when symbols are being wrapped. */ - if (link_info->wrap_hash != NULL) - { - struct elf_link_hash_entry **cur_sym_hashes; - - /* Loop only over the symbols whom been already checked. */ - for (cur_sym_hashes = start_hashes; cur_sym_hashes < sym_hashes; - cur_sym_hashes++) - { - /* If the current symbol is identical to 'sym_hash', that means - the symbol was already adjusted (or at least checked). */ - if (*cur_sym_hashes == sym_hash) - break; - } - /* Don't adjust the symbol again. */ - if (cur_sym_hashes < sym_hashes) - continue; - } - - 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; -} - -/* This is a version of bfd_generic_get_relocated_section_contents - which uses elf32_crx_relocate_section. */ - -static bfd_byte * -elf32_crx_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) - { - Elf_Internal_Sym *isym; - Elf_Internal_Sym *isymend; - asection **secpp; - bfd_size_type amt; - - internal_relocs = (_bfd_elf_link_read_relocs - (input_bfd, input_section, (PTR) 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 = 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_crx_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; -} - -/* Relocate a CRX ELF section. */ - -static bfd_boolean -elf32_crx_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; - - if (info->relocatable) - return TRUE; - - 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++) - { - int r_type; - 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; - - r_symndx = ELF32_R_SYM (rel->r_info); - r_type = ELF32_R_TYPE (rel->r_info); - howto = crx_elf_howto_table + (r_type); - - 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); - } - - r = crx_elf_final_link_relocate (howto, 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; -} - -/* This function handles relaxing for the CRX. - - There's quite a few relaxing opportunites available on the CRX: - - * bal/bcond:32 -> bal/bcond:16 2 bytes - * bcond:16 -> bcond:8 2 bytes - * cmpbcond:24 -> cmpbcond:8 2 bytes - * arithmetic imm32 -> arithmetic imm16 2 bytes - - Symbol- and reloc-reading infrastructure copied from elf-m10200.c. */ - -static bfd_boolean -elf32_crx_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; - - /* 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, (PTR) NULL, (Elf_Internal_Rela *) NULL, - link_info->keep_memory)); - if (internal_relocs == NULL) - goto error_return; - - /* Walk through them looking for relaxing opportunities. */ - irelend = internal_relocs + sec->reloc_count; - for (irel = internal_relocs; irel < irelend; irel++) - { - bfd_vma symval; - - /* If this isn't something that can be relaxed, then ignore - this reloc. */ - if (ELF32_R_TYPE (irel->r_info) != (int) R_CRX_REL32 - && ELF32_R_TYPE (irel->r_info) != (int) R_CRX_REL16 - && ELF32_R_TYPE (irel->r_info) != (int) R_CRX_REL24 - && ELF32_R_TYPE (irel->r_info) != (int) R_CRX_IMM32) - 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; - /* Go get them off disk. */ - else 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); - if (isym->st_shndx == SHN_UNDEF) - sym_sec = bfd_und_section_ptr; - else if (isym->st_shndx == SHN_ABS) - sym_sec = bfd_abs_section_ptr; - else if (isym->st_shndx == SHN_COMMON) - sym_sec = bfd_com_section_ptr; - else - sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); - symval = (isym->st_value - + 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. */ - - /* Try to turn a 32bit pc-relative branch/call into - a 16bit pc-relative branch/call. */ - if (ELF32_R_TYPE (irel->r_info) == (int) R_CRX_REL32) - { - bfd_vma value = symval; - - /* Deal with pc-relative gunk. */ - value -= (sec->output_section->vma + sec->output_offset); - value -= irel->r_offset; - value += irel->r_addend; - - /* See if the value will fit in 16 bits, note the high value is - 0xfffe + 2 as the target will be two bytes closer if we are - able to relax. */ - if ((long) value < 0x10000 && (long) value > -0x10002) - { - unsigned short code; - - /* Get the opcode. */ - code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset); - - /* Verify it's a 'bal'/'bcond' and fix the opcode. */ - if ((code & 0xfff0) == 0x3170) - bfd_put_8 (abfd, 0x30, contents + irel->r_offset + 1); - else if ((code & 0xf0ff) == 0x707f) - bfd_put_8 (abfd, 0x7e, contents + irel->r_offset); - else - continue; - - /* 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; - - /* Fix the relocation's type. */ - irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), - R_CRX_REL16); - - /* Delete two bytes of data. */ - if (!elf32_crx_relax_delete_bytes (link_info, abfd, sec, - irel->r_offset + 2, 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; - } - } - - /* Try to turn a 16bit pc-relative branch into an - 8bit pc-relative branch. */ - if (ELF32_R_TYPE (irel->r_info) == (int) R_CRX_REL16) - { - bfd_vma value = symval; - - /* Deal with pc-relative gunk. */ - value -= (sec->output_section->vma + sec->output_offset); - value -= irel->r_offset; - value += irel->r_addend; - - /* See if the value will fit in 8 bits, note the high value is - 0xfc + 2 as the target will be two bytes closer if we are - able to relax. */ - if ((long) value < 0xfe && (long) value > -0x100) - { - unsigned short code; - - /* Get the opcode. */ - code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset); - - /* Verify it's a 'bcond' opcode. */ - if ((code & 0xf0ff) != 0x707e) - continue; - - /* 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; - - /* Fix the relocation's type. */ - irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), - R_CRX_REL8); - - /* Delete two bytes of data. */ - if (!elf32_crx_relax_delete_bytes (link_info, abfd, sec, - irel->r_offset + 2, 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; - } - } - - /* Try to turn a 24bit pc-relative cmp&branch into - an 8bit pc-relative cmp&branch. */ - if (ELF32_R_TYPE (irel->r_info) == (int) R_CRX_REL24) - { - bfd_vma value = symval; - - /* Deal with pc-relative gunk. */ - value -= (sec->output_section->vma + sec->output_offset); - value -= irel->r_offset; - value += irel->r_addend; - - /* See if the value will fit in 8 bits, note the high value is - 0x7e + 2 as the target will be two bytes closer if we are - able to relax. */ - if ((long) value < 0x100 && (long) value > -0x100) - { - unsigned short code; - - /* Get the opcode. */ - code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset); - - /* Verify it's a 'cmp&branch' opcode. */ - if ((code & 0xfff0) != 0x3180 && (code & 0xfff0) != 0x3190 - && (code & 0xfff0) != 0x31a0 && (code & 0xfff0) != 0x31c0 - && (code & 0xfff0) != 0x31d0 && (code & 0xfff0) != 0x31e0 - /* Or a Co-processor branch ('bcop'). */ - && (code & 0xfff0) != 0x3010 && (code & 0xfff0) != 0x3110) - continue; - - /* 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; - - /* Fix the opcode. */ - bfd_put_8 (abfd, 0x30, contents + irel->r_offset + 1); - - /* Fix the relocation's type. */ - irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), - R_CRX_REL8_CMP); - - /* Delete two bytes of data. */ - if (!elf32_crx_relax_delete_bytes (link_info, abfd, sec, - irel->r_offset + 4, 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; - } - } - - /* Try to turn a 32bit immediate address into - a 16bit immediate address. */ - if (ELF32_R_TYPE (irel->r_info) == (int) R_CRX_IMM32) - { - bfd_vma value = symval; - - /* See if the value will fit in 16 bits. */ - if ((long) value < 0x7fff && (long) value > -0x8000) - { - unsigned short code; - - /* Get the opcode. */ - code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset); - - /* Verify it's a 'arithmetic double'. */ - if ((code & 0xf0f0) != 0x20f0) - continue; - - /* 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; - - /* Fix the opcode. */ - bfd_put_8 (abfd, (code & 0xff) - 0x10, contents + irel->r_offset); - - /* Fix the relocation's type. */ - irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), - R_CRX_IMM16); - - /* Delete two bytes of data. */ - if (!elf32_crx_relax_delete_bytes (link_info, abfd, sec, - irel->r_offset + 2, 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; - } - } - } - - if (isymbuf != NULL - && symtab_hdr->contents != (unsigned char *) isymbuf) - { - if (! link_info->keep_memory) - free (isymbuf); - else - { - /* Cache the symbols for elf_link_input_bfd. */ - 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; -} - -static asection * -elf32_crx_gc_mark_hook (asection *sec, - struct bfd_link_info *info ATTRIBUTE_UNUSED, - Elf_Internal_Rela *rel ATTRIBUTE_UNUSED, - struct elf_link_hash_entry *h, - Elf_Internal_Sym *sym) -{ - if (h == NULL) - return bfd_section_from_elf_index (sec->owner, sym->st_shndx); - - 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: - return NULL; - } -} - -/* Update the got entry reference counts for the section being removed. */ - -static bfd_boolean -elf32_crx_gc_sweep_hook (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 support garbage collection of GOT and PLT relocs yet. */ - return TRUE; -} - -/* Definitions for setting CRX target vector. */ -#define TARGET_LITTLE_SYM bfd_elf32_crx_vec -#define TARGET_LITTLE_NAME "elf32-crx" -#define ELF_ARCH bfd_arch_crx -#define ELF_MACHINE_CODE EM_CRX -#define ELF_MAXPAGESIZE 0x1 -#define elf_symbol_leading_char '_' - -#define bfd_elf32_bfd_reloc_type_lookup elf_crx_reloc_type_lookup -#define elf_info_to_howto elf_crx_info_to_howto -#define elf_info_to_howto_rel 0 -#define elf_backend_relocate_section elf32_crx_relocate_section -#define bfd_elf32_bfd_relax_section elf32_crx_relax_section -#define bfd_elf32_bfd_get_relocated_section_contents \ - elf32_crx_get_relocated_section_contents -#define elf_backend_gc_mark_hook elf32_crx_gc_mark_hook -#define elf_backend_gc_sweep_hook elf32_crx_gc_sweep_hook -#define elf_backend_can_gc_sections 1 -#define elf_backend_rela_normal 1 - -#include "elf32-target.h" |