Handle VDSO section headers past end of page
[deliverable/binutils-gdb.git] / bfd / elf-bfd.h
index c05807d18431676a2da0d8dce4491ec053759325..6d07303246306ae53e455962c4741e0606252416 100644 (file)
@@ -1,5 +1,5 @@
 /* BFD back-end data structures for ELF files.
-   Copyright 1992-2013 Free Software Foundation, Inc.
+   Copyright (C) 1992-2014 Free Software Foundation, Inc.
    Written by Cygnus Support.
 
    This file is part of BFD, the Binary File Descriptor library.
@@ -419,6 +419,7 @@ enum elf_target_id
   MICROBLAZE_ELF_DATA,
   MIPS_ELF_DATA,
   MN10300_ELF_DATA,
+  NDS32_ELF_DATA,
   NIOS2_ELF_DATA,
   PPC32_ELF_DATA,
   PPC64_ELF_DATA,
@@ -641,7 +642,8 @@ enum elf_reloc_type_class {
   reloc_class_normal,
   reloc_class_relative,
   reloc_class_plt,
-  reloc_class_copy
+  reloc_class_copy,
+  reloc_class_ifunc
 };
 
 struct elf_reloc_cookie
@@ -880,12 +882,12 @@ struct elf_backend_data
   bfd_boolean (*check_directives)
     (bfd *abfd, struct bfd_link_info *info);
 
-  /* The AS_NEEDED_CLEANUP function is called once per --as-needed
-     input file that was not needed by the add_symbols phase of the
-     ELF backend linker.  The function must undo any target specific
-     changes in the symbol hash table.  */
-  bfd_boolean (*as_needed_cleanup)
-    (bfd *abfd, struct bfd_link_info *info);
+  /* The NOTICE_AS_NEEDED function is called as the linker is about to
+     handle an as-needed lib (ACT = notice_as_needed), and after the
+     linker has decided to keep the lib (ACT = notice_needed) or when
+     the lib is not needed (ACT = notice_not_needed).  */
+  bfd_boolean (*notice_as_needed)
+    (bfd *abfd, struct bfd_link_info *info, enum notice_asneeded_action act);
 
   /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
      linker for every symbol which is defined by a dynamic object and
@@ -1128,7 +1130,7 @@ struct elf_backend_data
 
   /* This function returns class of a reloc type.  */
   enum elf_reloc_type_class (*elf_backend_reloc_type_class)
-    (const Elf_Internal_Rela *);
+  (const struct bfd_link_info *, const asection *, const Elf_Internal_Rela *);
 
   /* This function, if defined, removes information about discarded functions
      from other sections which mention them.  */
@@ -1189,9 +1191,9 @@ struct elf_backend_data
   /* This function implements `bfd_elf_bfd_from_remote_memory';
      see elf.c, elfcode.h.  */
   bfd *(*elf_backend_bfd_from_remote_memory)
-     (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
-      int (*target_read_memory) (bfd_vma vma, bfd_byte *myaddr,
-                                bfd_size_type len));
+    (bfd *templ, bfd_vma ehdr_vma, size_t size, bfd_vma *loadbasep,
+     int (*target_read_memory) (bfd_vma vma, bfd_byte *myaddr,
+                               bfd_size_type len));
 
   /* This function is used by `_bfd_elf_get_synthetic_symtab';
      see elf.c.  */
@@ -1340,6 +1342,11 @@ struct elf_backend_data
      other file in the link needs to have a .note.GNU-stack section
      for a PT_GNU_STACK segment to be created.  */
   unsigned default_execstack : 1;
+
+  /* True if elf_section_data(sec)->this_hdr.contents is sec->rawsize
+     in length rather than sec->size in length, if sec->rawsize is
+     non-zero and smaller than sec->size.  */
+  unsigned caches_rawsize : 1;
 };
 
 /* Information about reloc sections associated with a bfd_elf_section_data
@@ -1777,7 +1784,8 @@ extern bfd_boolean _bfd_elf_can_make_relative
   (bfd *input_bfd, struct bfd_link_info *info, asection *eh_frame_section);
 
 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
-  (const Elf_Internal_Rela *);
+  (const struct bfd_link_info *, const asection *,
+   const Elf_Internal_Rela *);
 extern bfd_vma _bfd_elf_rela_local_sym
   (bfd *, Elf_Internal_Sym *, asection **, Elf_Internal_Rela *);
 extern bfd_vma _bfd_elf_rel_local_sym
@@ -2038,7 +2046,7 @@ extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
 extern bfd_boolean _bfd_elf_setup_sections
   (bfd *);
 
-extern void _bfd_elf_set_osabi (bfd * , struct bfd_link_info *);
+extern void _bfd_elf_post_process_headers (bfd * , struct bfd_link_info *);
 
 extern const bfd_target *bfd_elf32_object_p
   (bfd *);
@@ -2137,6 +2145,8 @@ extern bfd_boolean _bfd_elf_default_relocs_compatible
 
 extern bfd_boolean _bfd_elf_relocs_compatible
   (const bfd_target *, const bfd_target *);
+extern bfd_boolean _bfd_elf_notice_as_needed
+  (bfd *, struct bfd_link_info *, enum notice_asneeded_action);
 
 extern struct elf_link_hash_entry *_bfd_elf_archive_symbol_lookup
   (bfd *, struct bfd_link_info *, const char *);
@@ -2324,10 +2334,10 @@ extern char *elfcore_write_ppc_linux_prpsinfo32
   (bfd *, char *, int *, const struct elf_internal_linux_prpsinfo *);
 
 extern bfd *_bfd_elf32_bfd_from_remote_memory
-  (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
+  (bfd *templ, bfd_vma ehdr_vma, size_t size, bfd_vma *loadbasep,
    int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type));
 extern bfd *_bfd_elf64_bfd_from_remote_memory
-  (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
+  (bfd *templ, bfd_vma ehdr_vma, size_t size, bfd_vma *loadbasep,
    int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type));
 
 extern bfd_vma bfd_elf_obj_attr_size (bfd *);
@@ -2376,12 +2386,9 @@ struct elf_dyn_relocs
 
 extern bfd_boolean _bfd_elf_create_ifunc_sections
   (bfd *, struct bfd_link_info *);
-extern asection * _bfd_elf_create_ifunc_dyn_reloc
-  (bfd *, struct bfd_link_info *, asection *sec, asection *sreloc,
-   struct elf_dyn_relocs **);
 extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs
   (struct bfd_link_info *, struct elf_link_hash_entry *,
-   struct elf_dyn_relocs **, unsigned int, unsigned int);
+   struct elf_dyn_relocs **, unsigned int, unsigned int, unsigned int);
 
 extern void elf_append_rela (bfd *, asection *, Elf_Internal_Rela *);
 extern void elf_append_rel (bfd *, asection *, Elf_Internal_Rela *);
@@ -2413,7 +2420,7 @@ extern asection _bfd_elf_large_com_section;
 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel,   \
                                r_symndx, symtab_hdr, sym_hashes,       \
                                h, sec, relocation,                     \
-                               unresolved_reloc, warned)               \
+                               unresolved_reloc, warned, ignored)      \
   do                                                                   \
     {                                                                  \
       /* It seems this can happen with erroneous or unsupported                \
@@ -2428,6 +2435,7 @@ extern asection _bfd_elf_large_com_section;
        h = (struct elf_link_hash_entry *) h->root.u.i.link;            \
                                                                        \
       warned = FALSE;                                                  \
+      ignored = FALSE;                                                 \
       unresolved_reloc = FALSE;                                                \
       relocation = 0;                                                  \
       if (h->root.type == bfd_link_hash_defined                                \
@@ -2450,7 +2458,7 @@ extern asection _bfd_elf_large_com_section;
        ;                                                               \
       else if (info->unresolved_syms_in_objects == RM_IGNORE           \
               && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)          \
-       ;                                                               \
+       ignored = TRUE;                                                 \
       else if (!info->relocatable)                                     \
        {                                                               \
          bfd_boolean err;                                              \
@@ -2466,6 +2474,7 @@ extern asection _bfd_elf_large_com_section;
        }                                                               \
       (void) unresolved_reloc;                                         \
       (void) warned;                                                   \
+      (void) ignored;                                                  \
     }                                                                  \
   while (0)
 
@@ -2495,16 +2504,16 @@ extern asection _bfd_elf_large_com_section;
        rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
                                                                        \
        /* Avoid empty output section.  */                              \
-       if (rel_hdr->sh_size > count * rel_hdr->sh_entsize)             \
+       if (rel_hdr->sh_size > rel_hdr->sh_entsize)                     \
          {                                                             \
-           rel_hdr->sh_size -= count * rel_hdr->sh_entsize;            \
+           rel_hdr->sh_size -= rel_hdr->sh_entsize;                    \
            rel_hdr = _bfd_elf_single_rel_hdr (input_section);          \
-           rel_hdr->sh_size -= count * rel_hdr->sh_entsize;            \
+           rel_hdr->sh_size -= rel_hdr->sh_entsize;                    \
                                                                        \
            memmove (rel, rel + count,                                  \
                     (relend - rel - count) * sizeof (*rel));           \
                                                                        \
-           input_section->reloc_count -= count;                        \
+           input_section->reloc_count--;                               \
            relend -= count;                                            \
            rel--;                                                      \
            continue;                                                   \
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