Initial revision

1 files changed, 534 insertions, 0 deletions

diff --git a/bfd/elf32-d10v.c b/bfd/elf32-d10v.c
new file mode 100644
index 00000000000..be80bae2e9b
--- /dev/null
+++ b/bfd/elf32-d10v.c
@@ -0,0 +1,534 @@
+/* D10V-specific support for 32-bit ELF
+   Copyright (C) 1996 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 *, Elf32_Internal_Rel *));
+
+
+/* Use REL instead of RELA to save space */
+#define USE_REL
+
+enum reloc_type
+{
+  R_D10V_NONE = 0,
+  R_D10V_10_PCREL_R,
+  R_D10V_10_PCREL_L,
+  R_D10V_16,
+  R_D10V_18,
+  R_D10V_18_PCREL,
+  R_D10V_32,
+  R_D10V_GNU_VTINHERIT,
+  R_D10V_GNU_VTENTRY,
+  R_D10V_max
+};
+
+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_bitfield, /* 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) */
+	 10,	                /* 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) */
+	 10,	                /* 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) */
+	 18,			/* 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) */
+	 18,			/* 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_bitfield, /* 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;
+     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;
+     arelent *cache_ptr;
+     Elf32_Internal_Rel *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 (abfd, info, rel, h, sym)
+       bfd *abfd;
+       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:
+        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;
+          }
+       }
+     }
+   else
+     {
+       if (!(elf_bad_symtab (abfd)
+           && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
+         && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
+                && sym->st_shndx != SHN_COMMON))
+          {
+            return bfd_section_from_elf_index (abfd, sym->st_shndx);
+          }
+      }
+  return NULL;
+}
+
+static boolean
+elf32_d10v_gc_sweep_hook (abfd, info, sec, relocs)
+     bfd *abfd;
+     struct bfd_link_info *info;
+     asection *sec;
+     const Elf_Internal_Rela *relocs;
+{
+  /* 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 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->relocateable)
+    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_elf32_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_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
+            return false;
+          break;
+        }
+    }
+ 
+  return true;
+}
+
+/* Relocate a D10V ELF section.  */
+static 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->relocateable)
+	{
+	  /* This is a relocateable 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)
+	    {
+	      sym = local_syms + r_symndx;
+	      if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
+		{
+		  sec = local_sections[r_symndx];
+		  rel->r_addend += sec->output_offset + sym->st_value;
+		}
+	    }
+
+	  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);
+	}
+      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;
+	  if (h->root.type == bfd_link_hash_defined
+	      || h->root.type == bfd_link_hash_defweak)
+	    {
+	      sec = h->root.u.def.section;
+	      relocation = (h->root.u.def.value
+			    + sec->output_section->vma
+			    + sec->output_offset);
+	    }
+	  else if (h->root.type == bfd_link_hash_undefweak)
+	    relocation = 0;
+	  else
+	    {
+	      if (!((*info->callbacks->undefined_symbol)
+		    (info, h->root.root.string, input_bfd,
+		     input_section, rel->r_offset)))
+		return false;
+	      relocation = 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);
+	}
+      
+      r = _bfd_final_link_relocate (howto, input_bfd, input_section,
+                                    contents, rel->r_offset,
+                                    relocation, rel->r_addend);
+
+      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)))
+		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_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"