sdcc-3.9.0 fork implementing GNU assembler syntax

This fork aims to provide better support for stm8-binutils

1 files changed, 528 insertions, 0 deletions

diff --git a/support/sdbinutils/bfd/arc-got.h b/support/sdbinutils/bfd/arc-got.h
new file mode 100644
index 0000000..a86061b
--- /dev/null
+++ b/support/sdbinutils/bfd/arc-got.h
@@ -0,0 +1,528 @@
+/* ARC-specific support for 32-bit ELF
+   Copyright (C) 1994-2018 Free Software Foundation, Inc.
+   Contributed by Cupertino Miranda (cmiranda@synopsys.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.  */
+
+#ifndef ARC_GOT_H
+#define ARC_GOT_H
+
+#define TCB_SIZE (8)
+
+enum tls_type_e
+{
+  GOT_UNKNOWN = 0,
+  GOT_NORMAL,
+  GOT_TLS_GD,
+  GOT_TLS_IE,
+  GOT_TLS_LE
+};
+
+enum tls_got_entries
+{
+  TLS_GOT_NONE = 0,
+  TLS_GOT_MOD,
+  TLS_GOT_OFF,
+  TLS_GOT_MOD_AND_OFF
+};
+
+struct got_entry
+{
+  struct got_entry *next;
+  enum tls_type_e type;
+  bfd_vma offset;
+  bfd_boolean processed;
+  bfd_boolean created_dyn_relocation;
+  enum tls_got_entries existing_entries;
+};
+
+static struct got_entry **
+arc_get_local_got_ents (bfd * abfd)
+{
+  static struct got_entry **local_got_ents = NULL;
+
+  if (local_got_ents == NULL)
+    {
+      size_t	   size;
+      Elf_Internal_Shdr *symtab_hdr = &((elf_tdata (abfd))->symtab_hdr);
+
+      size = symtab_hdr->sh_info * sizeof (bfd_vma);
+      local_got_ents = (struct got_entry **)
+	bfd_alloc (abfd, sizeof (struct got_entry *) * size);
+      if (local_got_ents == NULL)
+	return FALSE;
+
+      memset (local_got_ents, 0, sizeof (struct got_entry *) * size);
+      elf_local_got_ents (abfd) = local_got_ents;
+    }
+
+  return local_got_ents;
+}
+
+static struct got_entry *
+got_entry_for_type (struct got_entry **list,
+		    enum tls_type_e type)
+{
+  struct got_entry **p = list;
+
+  while (*p != NULL)
+    {
+      if ((*p)->type == type)
+	return *p;
+      p = &((*p)->next);
+    }
+  return NULL;
+}
+
+static void
+new_got_entry_to_list (struct got_entry **list,
+		       enum tls_type_e type,
+		       bfd_vma offset,
+		       enum tls_got_entries existing_entries)
+{
+  /* Find list end.  Avoid having multiple entries of the same
+     type.  */
+  struct got_entry **p = list;
+  struct got_entry *entry;
+
+  while (*p != NULL)
+    {
+      if ((*p)->type == type)
+	return;
+      p = &((*p)->next);
+    }
+
+  entry = (struct got_entry *) xmalloc (sizeof (struct got_entry));
+
+  entry->type = type;
+  entry->offset = offset;
+  entry->next = NULL;
+  entry->processed = FALSE;
+  entry->created_dyn_relocation = FALSE;
+  entry->existing_entries = existing_entries;
+
+  ARC_DEBUG ("New GOT got entry added to list: "
+	     "type: %d, offset: %ld, existing_entries: %d\n",
+	     type, (long) offset, existing_entries);
+
+  /* Add the entry to the end of the list.  */
+  *p = entry;
+}
+
+static enum tls_type_e
+tls_type_for_reloc (reloc_howto_type *howto)
+{
+  enum tls_type_e ret = GOT_UNKNOWN;
+
+  if (is_reloc_for_GOT (howto))
+    return GOT_NORMAL;
+
+  switch (howto->type)
+    {
+    case R_ARC_TLS_GD_GOT:
+      ret = GOT_TLS_GD;
+      break;
+    case R_ARC_TLS_IE_GOT:
+      ret = GOT_TLS_IE;
+      break;
+    case R_ARC_TLS_LE_32:
+      ret = GOT_TLS_LE;
+      break;
+    default:
+      ret = GOT_UNKNOWN;
+      break;
+    }
+
+  return ret;
+};
+
+static struct got_entry **
+get_got_entry_list_for_symbol (bfd *abfd,
+			       unsigned long r_symndx,
+			       struct elf_link_hash_entry *h)
+{
+  if (h != NULL)
+    {
+      return &h->got.glist;
+    }
+  else
+    {
+      struct got_entry **local_got_ents
+	= arc_get_local_got_ents (abfd);
+      return &local_got_ents[r_symndx];
+    }
+}
+
+
+static enum tls_type_e
+arc_got_entry_type_for_reloc (reloc_howto_type *howto)
+{
+  enum tls_type_e type = GOT_UNKNOWN;
+
+  if (is_reloc_for_GOT (howto))
+    return  GOT_NORMAL;
+
+  if (is_reloc_for_TLS (howto))
+    {
+      switch (howto->type)
+	{
+	  case R_ARC_TLS_GD_GOT:
+	    type = GOT_TLS_GD;
+	    break;
+	  case R_ARC_TLS_IE_GOT:
+	    type = GOT_TLS_IE;
+	    break;
+	  default:
+	    break;
+	}
+    }
+  return type;
+}
+
+#define ADD_SYMBOL_REF_SEC_AND_RELOC(SECNAME, COND_FOR_RELOC, H)	\
+  htab->s##SECNAME->size;						\
+  {									\
+    if (COND_FOR_RELOC)							\
+      {									\
+	htab->srel##SECNAME->size += sizeof (Elf32_External_Rela);	\
+	  ARC_DEBUG ("arc_info: Added reloc space in "			\
+		     #SECNAME " section at " __FILE__			\
+		     ":%d for symbol %s\n",				\
+		     __LINE__, name_for_global_symbol (H));		\
+      }									\
+    if (H)								\
+      if (h->dynindx == -1 && !h->forced_local)				\
+	if (! bfd_elf_link_record_dynamic_symbol (info, H))		\
+	  return FALSE;							\
+     htab->s##SECNAME->size += 4;					\
+   }									\
+
+static bfd_boolean
+arc_fill_got_info_for_reloc (enum tls_type_e type,
+			     struct got_entry **list,
+			     struct bfd_link_info *  info,
+			     struct elf_link_hash_entry *h)
+{
+  struct elf_link_hash_table *htab = elf_hash_table (info);
+
+  if (got_entry_for_type (list, type) != NULL)
+    return TRUE;
+
+  switch (type)
+    {
+      case GOT_NORMAL:
+	{
+	  bfd_vma offset
+	    = ADD_SYMBOL_REF_SEC_AND_RELOC (got, bfd_link_pic (info)
+						 || h != NULL, h);
+	  new_got_entry_to_list (list, type, offset, TLS_GOT_NONE);
+	}
+	break;
+
+
+      case GOT_TLS_GD:
+	{
+	  bfd_vma offset
+	    = ADD_SYMBOL_REF_SEC_AND_RELOC (got, TRUE, h);
+	  bfd_vma ATTRIBUTE_UNUSED notneeded
+	    = ADD_SYMBOL_REF_SEC_AND_RELOC (got, TRUE, h);
+	  new_got_entry_to_list (list, type, offset, TLS_GOT_MOD_AND_OFF);
+	}
+	break;
+      case GOT_TLS_IE:
+      case GOT_TLS_LE:
+	{
+	  bfd_vma offset
+	    = ADD_SYMBOL_REF_SEC_AND_RELOC (got, TRUE, h);
+	  new_got_entry_to_list (list, type, offset, TLS_GOT_OFF);
+	}
+	break;
+
+      default:
+	return FALSE;
+	break;
+    }
+  return TRUE;
+}
+
+
+static bfd_vma
+relocate_fix_got_relocs_for_got_info (struct got_entry **	   list_p,
+				      enum tls_type_e		   type,
+				      struct bfd_link_info *	   info,
+				      bfd *			   output_bfd,
+				      unsigned long		   r_symndx,
+				      Elf_Internal_Sym *	   local_syms,
+				      asection **		   local_sections,
+				      struct elf_link_hash_entry * h,
+				      struct arc_relocation_data * reloc_data)
+{
+  struct elf_link_hash_table *htab = elf_hash_table (info);
+  struct got_entry *entry = NULL;
+
+  if (list_p == NULL || type == GOT_UNKNOWN || type == GOT_TLS_LE)
+    return 0;
+
+  entry = got_entry_for_type (list_p, type);
+  BFD_ASSERT (entry);
+
+  if (h == NULL
+      || (! elf_hash_table (info)->dynamic_sections_created
+	  || (bfd_link_pic (info)
+	      && SYMBOL_REFERENCES_LOCAL (info, h))))
+    {
+      const char ATTRIBUTE_UNUSED *symbol_name;
+      static const char local_name[] = "(local)";
+      asection *tls_sec = NULL;
+      bfd_vma sym_value = 0;
+
+      if (h != NULL)
+	{
+	  // TODO: This should not be here.
+	  reloc_data->sym_value = h->root.u.def.value;
+	  reloc_data->sym_section = h->root.u.def.section;
+
+	  sym_value = h->root.u.def.value
+	    + h->root.u.def.section->output_section->vma
+	    + h->root.u.def.section->output_offset;
+
+	  tls_sec = elf_hash_table (info)->tls_sec;
+
+	  symbol_name = h->root.root.string;
+	}
+      else
+	{
+	  Elf_Internal_Sym *sym = local_syms + r_symndx;
+	  asection *sec = local_sections[r_symndx];
+
+	  sym_value = sym->st_value
+	    + sec->output_section->vma
+	    + sec->output_offset;
+
+	  tls_sec = elf_hash_table (info)->tls_sec;
+
+	  symbol_name = local_name;
+	}
+
+
+      if (entry && !entry->processed)
+	{
+	  switch (entry->type)
+	    {
+	    case GOT_TLS_GD:
+	      {
+		BFD_ASSERT (tls_sec && tls_sec->output_section);
+		bfd_vma sec_vma = tls_sec->output_section->vma;
+
+		bfd_put_32 (output_bfd,
+			    sym_value - sec_vma,
+			    htab->sgot->contents + entry->offset
+			    + (entry->existing_entries == TLS_GOT_MOD_AND_OFF
+			       ? 4 : 0));
+
+		ARC_DEBUG ("arc_info: FIXED -> %s value = %#lx "
+			   "@ %lx, for symbol %s\n",
+			   (entry->type == GOT_TLS_GD ? "GOT_TLS_GD" :
+			    "GOT_TLS_IE"),
+			   (long) (sym_value - sec_vma),
+			   (long) (htab->sgot->output_section->vma
+			      + htab->sgot->output_offset->vma
+			      + entry->offset
+			      + (entry->existing_entries == TLS_GOT_MOD_AND_OFF
+				 ? 4 : 0)),
+			   symbol_name);
+	      }
+	      break;
+
+	    case GOT_TLS_IE:
+	      {
+		BFD_ASSERT (tls_sec && tls_sec->output_section);
+		bfd_vma ATTRIBUTE_UNUSED sec_vma
+		  = tls_sec->output_section->vma;
+
+		bfd_put_32 (output_bfd,
+			    sym_value - sec_vma
+			    + (elf_hash_table (info)->dynamic_sections_created ? 0 : TCB_SIZE),
+			    htab->sgot->contents + entry->offset
+			    + (entry->existing_entries == TLS_GOT_MOD_AND_OFF
+			       ? 4 : 0));
+
+		ARC_DEBUG ("arc_info: FIXED -> %s value = %#lx "
+			   "@ %p, for symbol %s\n",
+			   (entry->type == GOT_TLS_GD ? "GOT_TLS_GD" :
+			    "GOT_TLS_IE"),
+			   (long) (sym_value - sec_vma),
+			   (long) (htab->sgot->output_section->vma
+			      + htab->sgot->output_offset->vma
+			      + entry->offset
+			      + (entry->existing_entries == TLS_GOT_MOD_AND_OFF
+				 ? 4 : 0)),
+			   symbol_name);
+	      }
+	      break;
+
+	    case GOT_NORMAL:
+	      {
+		bfd_vma sec_vma
+		  = reloc_data->sym_section->output_section->vma
+		  + reloc_data->sym_section->output_offset;
+
+		if (h != NULL
+		    && h->root.type == bfd_link_hash_undefweak)
+		  ARC_DEBUG ("arc_info: PATCHED: NOT_PATCHED "
+			     "@ %#08lx for sym %s in got offset %#lx "
+			     "(is undefweak)\n",
+			     (long) (htab->sgot->output_section->vma
+				     + htab->sgot->output_offset
+				     + entry->offset),
+			     symbol_name,
+			     (long) entry->offset);
+		else
+		  {
+		    bfd_put_32 (output_bfd,
+				reloc_data->sym_value + sec_vma,
+				htab->sgot->contents + entry->offset);
+		    ARC_DEBUG ("arc_info: PATCHED: %#08lx "
+			       "@ %#08lx for sym %s in got offset %#lx\n",
+			       (long) (reloc_data->sym_value + sec_vma),
+			       (long) (htab->sgot->output_section->vma
+				       + htab->sgot->output_offset + entry->offset),
+			       symbol_name,
+			       (long) entry->offset);
+		  }
+	      }
+	      break;
+	    default:
+	      BFD_ASSERT (0);
+	      break;
+	    }
+	  entry->processed = TRUE;
+	}
+    }
+
+  return entry->offset;
+}
+
+static void
+create_got_dynrelocs_for_single_entry (struct got_entry *list,
+				       bfd *output_bfd,
+				       struct bfd_link_info *  info,
+				       struct elf_link_hash_entry *h)
+{
+  if (list == NULL)
+    return;
+
+  bfd_vma got_offset = list->offset;
+
+  if (list->type == GOT_NORMAL
+      && !list->created_dyn_relocation)
+    {
+      if (bfd_link_pic (info)
+	  && h != NULL
+	      && (info->symbolic || h->dynindx == -1)
+	      && h->def_regular)
+	{
+	  ADD_RELA (output_bfd, got, got_offset, 0, R_ARC_RELATIVE, 0);
+	}
+      /* Do not fully understand the side effects of this condition.
+	 The relocation space might still being reserved.  Perhaps
+	 I should clear its value.  */
+      else if (h != NULL && h->dynindx != -1)
+	{
+	  ADD_RELA (output_bfd, got, got_offset, h->dynindx, R_ARC_GLOB_DAT, 0);
+	}
+      list->created_dyn_relocation = TRUE;
+    }
+  else if (list->existing_entries != TLS_GOT_NONE
+	   && !list->created_dyn_relocation)
+    {
+       /* TODO TLS: This is not called for local symbols.
+	  In order to correctly implement TLS, this should also
+	  be called for all local symbols with tls got entries.
+	  Should be moved to relocate_section in order to make it
+	  work for local symbols.  */
+      struct elf_link_hash_table *htab = elf_hash_table (info);
+      enum tls_got_entries e = list->existing_entries;
+
+      BFD_ASSERT (list->type != GOT_TLS_GD
+		  || list->existing_entries == TLS_GOT_MOD_AND_OFF);
+
+      bfd_vma dynindx = (h == NULL || h->dynindx == -1) ? 0 : h->dynindx;
+
+      if (e == TLS_GOT_MOD_AND_OFF || e == TLS_GOT_MOD)
+	{
+	      ADD_RELA (output_bfd, got, got_offset, dynindx,
+			R_ARC_TLS_DTPMOD, 0);
+	      ARC_DEBUG ("arc_info: TLS_DYNRELOC: type = %d, \
+GOT_OFFSET = %#lx, GOT_VMA = %#lx, INDEX = %ld, ADDEND = 0x0\n",
+			 list->type,
+			 (long) got_offset,
+			 (long) (htab->sgot->output_section->vma
+				 + htab->sgot->output_offset + got_offset),
+			 (long) dynindx);
+	}
+
+      if (e == TLS_GOT_MOD_AND_OFF || e == TLS_GOT_OFF)
+	{
+	  bfd_vma addend = 0;
+	  if (list->type == GOT_TLS_IE)
+	  {
+	    addend = bfd_get_32 (output_bfd,
+				 htab->sgot->contents + got_offset);
+	  }
+
+	  ADD_RELA (output_bfd, got,
+		    got_offset + (e == TLS_GOT_MOD_AND_OFF ? 4 : 0),
+		    dynindx,
+		    (list->type == GOT_TLS_IE ? R_ARC_TLS_TPOFF
+					      : R_ARC_TLS_DTPOFF),
+		    addend);
+
+	  ARC_DEBUG ("arc_info: TLS_DYNRELOC: type = %d, \
+GOT_OFFSET = %#lx, GOT_VMA = %#lx, INDEX = %ld, ADDEND = %#lx\n",
+		     list->type,
+		     (long) got_offset,
+		     (long) (htab->sgot->output_section->vma
+			     + htab->sgot->output_offset + got_offset),
+		     (long) dynindx, (long) addend);
+	}
+      list->created_dyn_relocation = TRUE;
+    }
+}
+
+static void
+create_got_dynrelocs_for_got_info (struct got_entry **list_p,
+				   bfd *output_bfd,
+				   struct bfd_link_info *  info,
+				   struct elf_link_hash_entry *h)
+{
+  if (list_p == NULL)
+    return;
+
+  struct got_entry *list = *list_p;
+  /* Traverse the list of got entries for this symbol.  */
+  while (list)
+    {
+      create_got_dynrelocs_for_single_entry (list, output_bfd, info, h);
+      list = list->next;
+    }
+}
+
+#undef ADD_SYMBOL_REF_SEC_AND_RELOC
+
+#endif /* ARC_GOT_H */