diff options
Diffstat (limited to 'binutils-2.25/bfd/elf32-d10v.c')
| -rw-r--r-- | binutils-2.25/bfd/elf32-d10v.c | 557 |
1 files changed, 557 insertions, 0 deletions
diff --git a/binutils-2.25/bfd/elf32-d10v.c b/binutils-2.25/bfd/elf32-d10v.c new file mode 100644 index 00000000..f75c16ae --- /dev/null +++ b/binutils-2.25/bfd/elf32-d10v.c @@ -0,0 +1,557 @@ +/* D10V-specific support for 32-bit ELF + Copyright 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, + 2007, 2010, 2012 Free Software Foundation, Inc. + Contributed by Martin Hunt (hunt@cygnus.com). + + 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/d10v.h" + +/* Use REL instead of RELA to save space. */ +#define USE_REL 1 + +static reloc_howto_type elf_d10v_howto_table[] = +{ + /* This reloc does nothing. */ + HOWTO (R_D10V_NONE, /* Type. */ + 0, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 32, /* Bitsize. */ + FALSE, /* PC_relative. */ + 0, /* Bitpos. */ + complain_overflow_dont,/* Complain_on_overflow. */ + bfd_elf_generic_reloc, /* Special_function. */ + "R_D10V_NONE", /* Name. */ + FALSE, /* Partial_inplace. */ + 0, /* Src_mask. */ + 0, /* Dst_mask. */ + FALSE), /* PCrel_offset. */ + + /* An PC Relative 10-bit relocation, shifted by 2, right container. */ + HOWTO (R_D10V_10_PCREL_R, /* Type. */ + 2, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 8, /* Bitsize. */ + TRUE, /* PC_relative. */ + 0, /* Bitpos. */ + complain_overflow_signed, /* Complain_on_overflow. */ + bfd_elf_generic_reloc, /* Special_function. */ + "R_D10V_10_PCREL_R", /* Name. */ + FALSE, /* Partial_inplace. */ + 0xff, /* Src_mask. */ + 0xff, /* Dst_mask. */ + TRUE), /* PCrel_offset. */ + + /* An PC Relative 10-bit relocation, shifted by 2, left container. */ + HOWTO (R_D10V_10_PCREL_L, /* Type. */ + 2, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 8, /* Bitsize. */ + TRUE, /* PC_relative. */ + 15, /* Bitpos. */ + complain_overflow_signed, /* Complain_on_overflow. */ + bfd_elf_generic_reloc, /* Special_function. */ + "R_D10V_10_PCREL_L", /* Name. */ + FALSE, /* Partial_inplace. */ + 0x07f8000, /* Src_mask. */ + 0x07f8000, /* Dst_mask. */ + TRUE), /* PCrel_offset. */ + + /* A 16 bit absolute relocation. */ + HOWTO (R_D10V_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_D10V_16", /* Name. */ + FALSE, /* Partial_inplace. */ + 0xffff, /* Src_mask. */ + 0xffff, /* Dst_mask. */ + FALSE), /* PCrel_offset. */ + + /* An 18 bit absolute relocation, right shifted 2. */ + HOWTO (R_D10V_18, /* Type. */ + 2, /* 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_D10V_18", /* Name. */ + FALSE, /* Partial_inplace. */ + 0xffff, /* Src_mask. */ + 0xffff, /* Dst_mask. */ + FALSE), /* PCrel_offset. */ + + /* A relative 18 bit relocation, right shifted by 2. */ + HOWTO (R_D10V_18_PCREL, /* Type. */ + 2, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 16, /* Bitsize. */ + TRUE, /* PC_relative. */ + 0, /* Bitpos. */ + complain_overflow_signed, /* Complain_on_overflow. */ + bfd_elf_generic_reloc, /* Special_function. */ + "R_D10V_18_PCREL", /* Name. */ + FALSE, /* Partial_inplace. */ + 0xffff, /* Src_mask. */ + 0xffff, /* Dst_mask. */ + TRUE), /* PCrel_offset. */ + + /* A 32 bit absolute relocation. */ + HOWTO (R_D10V_32, /* Type. */ + 0, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 32, /* Bitsize. */ + FALSE, /* PC_relative. */ + 0, /* Bitpos. */ + complain_overflow_dont,/* Complain_on_overflow. */ + bfd_elf_generic_reloc, /* Special_function. */ + "R_D10V_32", /* Name. */ + FALSE, /* Partial_inplace. */ + 0xffffffff, /* Src_mask. */ + 0xffffffff, /* Dst_mask. */ + FALSE), /* PCrel_offset. */ + + /* GNU extension to record C++ vtable hierarchy. */ + HOWTO (R_D10V_GNU_VTINHERIT, /* Type. */ + 0, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 0, /* Bitsize. */ + FALSE, /* PC_relative. */ + 0, /* Bitpos. */ + complain_overflow_dont,/* Complain_on_overflow. */ + NULL, /* Special_function. */ + "R_D10V_GNU_VTINHERIT",/* Name. */ + FALSE, /* Partial_inplace. */ + 0, /* Src_mask. */ + 0, /* Dst_mask. */ + FALSE), /* PCrel_offset. */ + + /* GNU extension to record C++ vtable member usage. */ + HOWTO (R_D10V_GNU_VTENTRY, /* Type. */ + 0, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 0, /* Bitsize. */ + FALSE, /* PC_relative. */ + 0, /* Bitpos. */ + complain_overflow_dont,/* Complain_on_overflow. */ + _bfd_elf_rel_vtable_reloc_fn, /* Special_function. */ + "R_D10V_GNU_VTENTRY", /* Name. */ + FALSE, /* Partial_inplace. */ + 0, /* Src_mask. */ + 0, /* Dst_mask. */ + FALSE), /* PCrel_offset. */ +}; + +/* Map BFD reloc types to D10V ELF reloc types. */ + +struct d10v_reloc_map +{ + bfd_reloc_code_real_type bfd_reloc_val; + unsigned char elf_reloc_val; +}; + +static const struct d10v_reloc_map d10v_reloc_map[] = +{ + { BFD_RELOC_NONE, R_D10V_NONE, }, + { BFD_RELOC_D10V_10_PCREL_R, R_D10V_10_PCREL_R }, + { BFD_RELOC_D10V_10_PCREL_L, R_D10V_10_PCREL_L }, + { BFD_RELOC_16, R_D10V_16 }, + { BFD_RELOC_D10V_18, R_D10V_18 }, + { BFD_RELOC_D10V_18_PCREL, R_D10V_18_PCREL }, + { BFD_RELOC_32, R_D10V_32 }, + { BFD_RELOC_VTABLE_INHERIT, R_D10V_GNU_VTINHERIT }, + { BFD_RELOC_VTABLE_ENTRY, R_D10V_GNU_VTENTRY }, +}; + +static reloc_howto_type * +bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, + bfd_reloc_code_real_type code) +{ + unsigned int i; + + for (i = 0; + i < sizeof (d10v_reloc_map) / sizeof (struct d10v_reloc_map); + i++) + if (d10v_reloc_map[i].bfd_reloc_val == code) + return &elf_d10v_howto_table[d10v_reloc_map[i].elf_reloc_val]; + + return NULL; +} + +static reloc_howto_type * +bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, + const char *r_name) +{ + unsigned int i; + + for (i = 0; + i < sizeof (elf_d10v_howto_table) / sizeof (elf_d10v_howto_table[0]); + i++) + if (elf_d10v_howto_table[i].name != NULL + && strcasecmp (elf_d10v_howto_table[i].name, r_name) == 0) + return &elf_d10v_howto_table[i]; + + return NULL; +} + +/* Set the howto pointer for an D10V ELF reloc. */ + +static void +d10v_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, + arelent *cache_ptr, + Elf_Internal_Rela *dst) +{ + unsigned int r_type; + + r_type = ELF32_R_TYPE (dst->r_info); + BFD_ASSERT (r_type < (unsigned int) R_D10V_max); + cache_ptr->howto = &elf_d10v_howto_table[r_type]; +} + +static asection * +elf32_d10v_gc_mark_hook (asection *sec, + struct bfd_link_info *info, + Elf_Internal_Rela *rel, + struct elf_link_hash_entry *h, + Elf_Internal_Sym *sym) +{ + if (h != NULL) + switch (ELF32_R_TYPE (rel->r_info)) + { + case R_D10V_GNU_VTINHERIT: + case R_D10V_GNU_VTENTRY: + return NULL; + } + + return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); +} + +/* 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 bfd_boolean +elf32_d10v_check_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; + const Elf_Internal_Rela *rel; + const Elf_Internal_Rela *rel_end; + + if (info->relocatable) + return TRUE; + + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (abfd); + + 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]; + 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; + + /* PR15323, ref flags aren't set for references in the same + object. */ + h->root.non_ir_ref = 1; + } + + switch (ELF32_R_TYPE (rel->r_info)) + { + /* This relocation describes the C++ object vtable hierarchy. + Reconstruct it for later use during GC. */ + case R_D10V_GNU_VTINHERIT: + if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) + return FALSE; + break; + + /* This relocation describes which C++ vtable entries are actually + used. Record for later use during GC. */ + case R_D10V_GNU_VTENTRY: + BFD_ASSERT (h != NULL); + if (h != NULL + && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) + return FALSE; + break; + } + } + + return TRUE; +} + +static bfd_vma +extract_rel_addend (bfd *abfd, + bfd_byte *where, + reloc_howto_type *howto) +{ + bfd_vma insn, val; + + switch (howto->size) + { + case 0: + insn = bfd_get_8 (abfd, where); + break; + case 1: + insn = bfd_get_16 (abfd, where); + break; + case 2: + insn = bfd_get_32 (abfd, where); + break; + default: + abort (); + } + + val = (insn & howto->dst_mask) >> howto->bitpos << howto->rightshift; + /* We should really be testing for signed addends here, but we don't + have that info directly in the howto. */ + if (howto->pc_relative) + { + bfd_vma sign; + sign = howto->dst_mask & (~howto->dst_mask >> 1 | ~(-(bfd_vma) 1 >> 1)); + sign = sign >> howto->bitpos << howto->rightshift; + val = (val ^ sign) - sign; + } + return val; +} + +static void +insert_rel_addend (bfd *abfd, + bfd_byte *where, + reloc_howto_type *howto, + bfd_vma addend) +{ + bfd_vma insn; + + addend = (addend >> howto->rightshift << howto->bitpos) & howto->dst_mask; + insn = ~howto->dst_mask; + switch (howto->size) + { + case 0: + insn &= bfd_get_8 (abfd, where); + insn |= addend; + bfd_put_8 (abfd, insn, where); + break; + case 1: + insn &= bfd_get_16 (abfd, where); + insn |= addend; + bfd_put_16 (abfd, insn, where); + break; + case 2: + insn &= bfd_get_32 (abfd, where); + insn |= addend; + bfd_put_32 (abfd, insn, where); + break; + default: + abort (); + } +} + +/* Relocate a D10V ELF section. */ + +static bfd_boolean +elf32_d10v_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; + const char *name; + + 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); + + if (r_type == R_D10V_GNU_VTENTRY + || r_type == R_D10V_GNU_VTINHERIT) + continue; + + howto = elf_d10v_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 = (sec->output_section->vma + + sec->output_offset + + sym->st_value); + if (ELF_ST_TYPE (sym->st_info) == STT_SECTION + && ((sec->flags & SEC_MERGE) != 0 + || (info->relocatable + && sec->output_offset != 0))) + { + bfd_vma addend; + bfd_byte *where = contents + rel->r_offset; + + addend = extract_rel_addend (input_bfd, where, howto); + + if (info->relocatable) + addend += sec->output_offset; + else + { + asection *msec = sec; + addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, + addend); + addend -= relocation; + addend += msec->output_section->vma + msec->output_offset; + } + insert_rel_addend (input_bfd, where, howto, addend); + } + } + 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; + + 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); + } + + r = _bfd_final_link_relocate (howto, input_bfd, input_section, + contents, rel->r_offset, + relocation, (bfd_vma) 0); + + if (r != bfd_reloc_ok) + { + const char * msg = (const char *) 0; + + 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; +} +#define ELF_ARCH bfd_arch_d10v +#define ELF_MACHINE_CODE EM_D10V +#define ELF_MACHINE_ALT1 EM_CYGNUS_D10V +#define ELF_MAXPAGESIZE 0x1000 + +#define TARGET_BIG_SYM bfd_elf32_d10v_vec +#define TARGET_BIG_NAME "elf32-d10v" + +#define elf_info_to_howto 0 +#define elf_info_to_howto_rel d10v_info_to_howto_rel +#define elf_backend_object_p 0 +#define elf_backend_final_write_processing 0 +#define elf_backend_gc_mark_hook elf32_d10v_gc_mark_hook +#define elf_backend_check_relocs elf32_d10v_check_relocs +#define elf_backend_relocate_section elf32_d10v_relocate_section +#define elf_backend_can_gc_sections 1 + +#include "elf32-target.h" |