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Diffstat (limited to 'bfd/elf32-d10v.c')
-rw-r--r--bfd/elf32-d10v.c608
1 files changed, 608 insertions, 0 deletions
diff --git a/bfd/elf32-d10v.c b/bfd/elf32-d10v.c
new file mode 100644
index 000000000000..e845a254e47e
--- /dev/null
+++ b/bfd/elf32-d10v.c
@@ -0,0 +1,608 @@
+/* D10V-specific support for 32-bit ELF
+ Copyright 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004
+ 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 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "libbfd.h"
+#include "elf-bfd.h"
+#include "elf/d10v.h"
+
+static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
+ PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
+static void d10v_info_to_howto_rel
+ PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
+static asection * elf32_d10v_gc_mark_hook
+ PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
+ struct elf_link_hash_entry *, Elf_Internal_Sym *));
+static bfd_boolean elf32_d10v_gc_sweep_hook
+ PARAMS ((bfd *, struct bfd_link_info *, asection *,
+ const Elf_Internal_Rela *));
+static bfd_boolean elf32_d10v_check_relocs
+ PARAMS ((bfd *, struct bfd_link_info *, asection *,
+ const Elf_Internal_Rela *));
+static bfd_vma extract_rel_addend
+ PARAMS ((bfd *, bfd_byte *, reloc_howto_type *));
+static void insert_rel_addend
+ PARAMS ((bfd *, bfd_byte *, reloc_howto_type *, bfd_vma));
+static bfd_boolean elf32_d10v_relocate_section
+ PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *,
+ bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *,
+ asection **));
+
+/* 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) */
+ 7, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* 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) */
+ 7, /* bitsize */
+ TRUE, /* pc_relative */
+ 15, /* bitpos */
+ complain_overflow_bitfield, /* 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) */
+ 15, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* 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 (abfd, code)
+ 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;
+}
+
+/* Set the howto pointer for an D10V ELF reloc. */
+
+static void
+d10v_info_to_howto_rel (abfd, cache_ptr, dst)
+ 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 (sec, info, rel, h, sym)
+ asection *sec;
+ struct bfd_link_info *info ATTRIBUTE_UNUSED;
+ Elf_Internal_Rela *rel;
+ struct elf_link_hash_entry *h;
+ Elf_Internal_Sym *sym;
+{
+ if (h != NULL)
+ {
+ switch (ELF32_R_TYPE (rel->r_info))
+ {
+ case R_D10V_GNU_VTINHERIT:
+ case R_D10V_GNU_VTENTRY:
+ break;
+
+ default:
+ switch (h->root.type)
+ {
+ case bfd_link_hash_defined:
+ case bfd_link_hash_defweak:
+ return h->root.u.def.section;
+
+ case bfd_link_hash_common:
+ return h->root.u.c.p->section;
+
+ default:
+ break;
+ }
+ }
+ }
+ else
+ return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
+
+ return NULL;
+}
+
+static bfd_boolean
+elf32_d10v_gc_sweep_hook (abfd, info, sec, relocs)
+ bfd *abfd ATTRIBUTE_UNUSED;
+ struct bfd_link_info *info ATTRIBUTE_UNUSED;
+ asection *sec ATTRIBUTE_UNUSED;
+ const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
+{
+ /* we don't use got and plt entries for d10v */
+ return TRUE;
+}
+
+/* Look through the relocs for a section during the first phase.
+ Since we don't do .gots or .plts, we just need to consider the
+ virtual table relocs for gc. */
+
+static bfd_boolean
+elf32_d10v_check_relocs (abfd, info, sec, relocs)
+ bfd *abfd;
+ struct bfd_link_info *info;
+ asection *sec;
+ const Elf_Internal_Rela *relocs;
+{
+ Elf_Internal_Shdr *symtab_hdr;
+ struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
+ const Elf_Internal_Rela *rel;
+ const Elf_Internal_Rela *rel_end;
+
+ if (info->relocatable)
+ return TRUE;
+
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ sym_hashes = elf_sym_hashes (abfd);
+ sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
+ if (!elf_bad_symtab (abfd))
+ sym_hashes_end -= symtab_hdr->sh_info;
+
+ rel_end = relocs + sec->reloc_count;
+ for (rel = relocs; rel < rel_end; rel++)
+ {
+ struct elf_link_hash_entry *h;
+ unsigned long r_symndx;
+
+ r_symndx = ELF32_R_SYM (rel->r_info);
+ if (r_symndx < symtab_hdr->sh_info)
+ h = NULL;
+ else
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+
+ 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:
+ if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
+ return FALSE;
+ break;
+ }
+ }
+
+ return TRUE;
+}
+
+static bfd_vma
+extract_rel_addend (abfd, where, howto)
+ 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 (abfd, where, howto, 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 (output_bfd, info, input_bfd, input_section,
+ contents, relocs, local_syms, local_sections)
+ 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;
+
+ if (info->relocatable)
+ {
+ bfd_vma val;
+ bfd_byte *where;
+
+ /* This is a relocatable link. We don't have to change
+ anything, unless the reloc is against a section symbol,
+ in which case we have to adjust according to where the
+ section symbol winds up in the output section. */
+ if (r_symndx >= symtab_hdr->sh_info)
+ continue;
+
+ sym = local_syms + r_symndx;
+ if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
+ continue;
+
+ sec = local_sections[r_symndx];
+ val = sec->output_offset;
+ if (val == 0)
+ continue;
+
+ where = contents + rel->r_offset;
+ val += extract_rel_addend (input_bfd, where, howto);
+ insert_rel_addend (input_bfd, where, howto, val);
+ continue;
+ }
+
+ /* This is a final link. */
+ 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 ((sec->flags & SEC_MERGE)
+ && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
+ {
+ asection *msec;
+ bfd_vma addend;
+ bfd_byte *where = contents + rel->r_offset;
+
+ addend = extract_rel_addend (input_bfd, where, howto);
+ 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 (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, 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_gc_sweep_hook elf32_d10v_gc_sweep_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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