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[/] [openrisc/] [trunk/] [gnu-src/] [binutils-2.18.50/] [bfd/] [elf32-d10v.c] - Rev 262
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/* D10V-specific support for 32-bit ELF Copyright 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 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; } 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 && elf_discarded_section (sec)) { /* For relocs against symbols from removed linkonce sections, or sections discarded by a linker script, we just want the section contents zeroed. Avoid any special processing. */ _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); rel->r_info = 0; rel->r_addend = 0; continue; } 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"
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