/* BFD back-end data structures for ELF files.
- Copyright (C) 1992-2016 Free Software Foundation, Inc.
+ Copyright (C) 1992-2017 Free Software Foundation, Inc.
Written by Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
or 0 if the CIE doesn't have any. */
unsigned int personality_offset : 8;
+ /* Length of augmentation. aug_str_len is the length of the
+ string including null terminator. aug_data_len is the length
+ of the rest up to the initial insns. */
+ unsigned int aug_str_len : 3;
+ unsigned int aug_data_len : 5;
+
/* True if we have marked relocations associated with this CIE. */
unsigned int gc_mark : 1;
make_per_encoding_relative is. */
unsigned int per_encoding_relative : 1;
+ /* True if the CIE contains personality data aligned to a
+ multiple of eight bytes. */
+ unsigned int per_encoding_aligned8 : 1;
+
/* True if we need to add an 'R' (FDE encoding) entry to the
CIE's augmentation data. */
unsigned int add_fde_encoding : 1;
unsigned int merged : 1;
/* Unused bits. */
- unsigned int pad1 : 18;
+ unsigned int pad1 : 9;
} cie;
} u;
unsigned int reloc_index;
{
AARCH64_ELF_DATA = 1,
ALPHA_ELF_DATA,
+ ARC_ELF_DATA,
ARM_ELF_DATA,
AVR_ELF_DATA,
BFIN_ELF_DATA,
OR1K_ELF_DATA,
PPC32_ELF_DATA,
PPC64_ELF_DATA,
+ PRU_ELF_DATA,
S390_ELF_DATA,
SH_ELF_DATA,
SPARC_ELF_DATA,
XGATE_ELF_DATA,
TILEGX_ELF_DATA,
TILEPRO_ELF_DATA,
+ RISCV_ELF_DATA,
GENERIC_ELF_DATA
};
/* The number of symbols found in the link which is intended for the
mandatory DT_SYMTAB tag (.dynsym section) in .dynamic section. */
bfd_size_type dynsymcount;
+ bfd_size_type local_dynsymcount;
/* The string table of dynamic symbols, which becomes the .dynstr
section. */
asection *srelgot;
asection *splt;
asection *srelplt;
+ asection *sdynbss;
+ asection *srelbss;
+ asection *sdynrelro;
+ asection *sreldynrelro;
asection *igotplt;
asection *iplt;
asection *irelplt;
(asection *, struct bfd_link_info *, Elf_Internal_Rela *,
struct elf_link_hash_entry *, Elf_Internal_Sym *);
+enum elf_property_kind
+ {
+ /* A new property. */
+ property_unknown = 0,
+ /* A property ignored by backend. */
+ property_ignored,
+ /* A corrupt property reported by backend. */
+ property_corrupt,
+ /* A property should be removed due to property merge. */
+ property_remove,
+ /* A property which is a number. */
+ property_number
+ };
+
+typedef struct elf_property
+{
+ unsigned int pr_type;
+ unsigned int pr_datasz;
+ union
+ {
+ /* For property_number, this is a number. */
+ bfd_vma number;
+ /* Add a new one if elf_property_kind is updated. */
+ } u;
+ enum elf_property_kind pr_kind;
+} elf_property;
+
+typedef struct elf_property_list
+{
+ struct elf_property_list *next;
+ struct elf_property property;
+} elf_property_list;
+
+struct bfd_elf_section_reloc_data;
+
struct elf_backend_data
{
/* The architecture for this backend. */
/* The ELF machine code (EM_xxxx) for this backend. */
int elf_machine_code;
- /* EI_OSABI. */
+ /* EI_OSABI. */
int elf_osabi;
/* The maximum page size for this backend. */
bfd_boolean (*elf_backend_modify_program_headers)
(bfd *, struct bfd_link_info *);
+ /* This function is called to see if the PHDR header should be
+ checked for validity. */
+ bfd_boolean (*elf_backend_allow_non_load_phdr)
+ (bfd *, const Elf_Internal_Phdr *, unsigned);
+
/* This function is called before section garbage collection to
mark entry symbol sections. */
void (*gc_keep)
bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *,
struct elf_link_hash_entry *));
+ /* Filter what symbols of the output file to include in the import
+ library if one is created. */
+ unsigned int (*elf_backend_filter_implib_symbols)
+ (bfd *, struct bfd_link_info *, asymbol **, long);
+
/* Copy any information related to dynamic linking from a pre-existing
symbol to a newly created symbol. Also called to copy flags and
other back-end info to a weakdef, in which case the symbol is not
(bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *,
struct elf_link_hash_entry **);
+ /* Update relocations. It is allowed to change the number and the order.
+ In such a case hashes should be invalidated. */
+ void (*elf_backend_update_relocs)
+ (asection *, struct bfd_elf_section_reloc_data *);
+
/* Count relocations. Not called for relocatable links
or if all relocs are being preserved in the output. */
unsigned int (*elf_backend_count_relocs)
that can't be determined for some reason. The default definition
goes by the bfd's EI_CLASS. */
unsigned int (*elf_backend_eh_frame_address_size)
- (bfd *, asection *);
+ (bfd *, const asection *);
/* These functions tell elf-eh-frame whether to attempt to turn
absolute or lsda encodings into pc-relative ones. The default
bfd_size_type (*maybe_function_sym) (const asymbol *sym, asection *sec,
bfd_vma *code_off);
- /* Return the section which RELOC_SEC applies to. */
- asection *(*get_reloc_section) (asection *reloc_sec);
+ /* Given NAME, the name of a relocation section stripped of its
+ .rel/.rela prefix, return the section in ABFD to which the
+ relocations apply. */
+ asection *(*get_reloc_section) (bfd *abfd, const char *name);
/* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
has a type >= SHT_LOOS. Returns TRUE if the fields were initialised,
Elf_Internal_Shdr *osection);
/* Used to handle bad SHF_LINK_ORDER input. */
- bfd_error_handler_type link_order_error_handler;
+ void (*link_order_error_handler) (const char *, ...);
/* Name of the PLT relocation section. */
const char *relplt_name;
or give an error and return FALSE. */
bfd_boolean (*obj_attrs_handle_unknown) (bfd *, int);
+ /* Parse GNU properties. Return the property kind. If the property
+ is corrupt, issue an error message and return property_corrupt. */
+ enum elf_property_kind (*parse_gnu_properties) (bfd *, unsigned int,
+ bfd_byte *,
+ unsigned int);
+
+ /* Merge GNU properties. Return TRUE if property is updated. */
+ bfd_boolean (*merge_gnu_properties) (struct bfd_link_info *, bfd *,
+ elf_property *, elf_property *);
+
+ /* Set up GNU properties. */
+ bfd *(*setup_gnu_properties) (struct bfd_link_info *);
+
/* Encoding used for compact EH tables. */
int (*compact_eh_encoding) (struct bfd_link_info *);
/* This is non-zero if static TLS segments require a special alignment. */
unsigned static_tls_alignment;
- /* Alignment for the PT_GNU_STACK segment. */
+ /* Alignment for the PT_GNU_STACK segment. */
unsigned stack_align;
/* Flag bits to assign to a section of type SHT_STRTAB. */
backend relocate_section routine for relocatable linking. */
unsigned rela_normal : 1;
+ /* Set if DT_REL/DT_RELA/DT_RELSZ/DT_RELASZ should not include PLT
+ relocations. */
+ unsigned dtrel_excludes_plt : 1;
+
/* TRUE if addresses "naturally" sign extend. This is used when
swapping in from Elf32 when BFD64. */
unsigned sign_extend_vma : 1;
unsigned can_refcount : 1;
unsigned want_got_sym : 1;
unsigned want_dynbss : 1;
+ unsigned want_dynrelro : 1;
/* Targets which do not support physical addressing often require
that the p_paddr field in the section header to be set to zero.
This field indicates whether this behavior is required. */
unsigned want_p_paddr_set_to_zero : 1;
+ /* Target has broken hardware and/or kernel that requires pages not
+ to be mapped twice with different permissions. */
+ unsigned no_page_alias : 1;
+
/* True if an object file lacking a .note.GNU-stack section
should be assumed to be requesting exec stack. At least one
other file in the link needs to have a .note.GNU-stack section
/* Address of protected data defined in the shared library may be
external, i.e., due to copy relocation. */
unsigned extern_protected_data : 1;
+
+ /* True if `_bfd_elf_link_renumber_dynsyms' must be called even for
+ static binaries. */
+ unsigned always_renumber_dynsyms : 1;
};
/* Information about reloc sections associated with a bfd_elf_section_data
symbol type or STB_GNU_UNIQUE binding. Used to set the osabi
field in the ELF header structure. */
enum elf_gnu_symbols
- {
- elf_gnu_symbol_none = 0,
- elf_gnu_symbol_any = 1 << 0,
- elf_gnu_symbol_ifunc = (elf_gnu_symbol_any | 1 << 1),
- elf_gnu_symbol_unique = (elf_gnu_symbol_any | 1 << 2),
- elf_gnu_symbol_all = (elf_gnu_symbol_ifunc | elf_gnu_symbol_unique)
- };
+{
+ elf_gnu_symbol_none = 0,
+ elf_gnu_symbol_any = 1 << 0,
+ elf_gnu_symbol_ifunc = (elf_gnu_symbol_any | 1 << 1),
+ elf_gnu_symbol_unique = (elf_gnu_symbol_any | 1 << 2),
+ elf_gnu_symbol_all = (elf_gnu_symbol_ifunc | elf_gnu_symbol_unique)
+};
typedef struct elf_section_list
{
unsigned int ndx;
struct elf_section_list * next;
} elf_section_list;
-
-
+
/* Some private data is stashed away for future use using the tdata pointer
in the bfd structure. */
/* Symbol buffer. */
void *symbuf;
+ /* List of GNU properties. Will be updated by setup_gnu_properties
+ after all input GNU properties are merged for output. */
+ elf_property_list *properties;
+
obj_attribute known_obj_attributes[2][NUM_KNOWN_OBJ_ATTRIBUTES];
obj_attribute_list *other_obj_attributes[2];
(elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
#define elf_other_obj_attributes_proc(bfd) \
(elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
+#define elf_properties(bfd) (elf_tdata (bfd) -> properties)
\f
extern void _bfd_elf_swap_verdef_in
(bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *);
(bfd *, void *, asymbol *, bfd_print_symbol_type);
extern unsigned int _bfd_elf_eh_frame_address_size
- (bfd *, asection *);
+ (bfd *, const asection *);
extern bfd_byte _bfd_elf_encode_eh_address
(bfd *abfd, struct bfd_link_info *info, asection *osec, bfd_vma offset,
asection *loc_sec, bfd_vma loc_offset, bfd_vma *encoded);
(bfd *, asection *, struct bfd_link_info *);
extern void bfd_elf_set_group_contents
(bfd *, asection *, void *);
+extern unsigned int _bfd_elf_filter_global_symbols
+ (bfd *, struct bfd_link_info *, asymbol **, long);
extern asection *_bfd_elf_check_kept_section
(asection *, struct bfd_link_info *);
#define _bfd_elf_link_just_syms _bfd_generic_link_just_syms
extern bfd_boolean _bfd_elf_discard_section_eh_frame
(bfd *, struct bfd_link_info *, asection *,
bfd_boolean (*) (bfd_vma, void *), struct elf_reloc_cookie *);
+extern bfd_boolean _bfd_elf_adjust_eh_frame_global_symbol
+ (struct elf_link_hash_entry *, void *);
extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr
(bfd *, struct bfd_link_info *);
extern bfd_vma _bfd_elf_eh_frame_section_offset
extern bfd_size_type _bfd_elf_maybe_function_sym (const asymbol *, asection *,
bfd_vma *);
-extern asection *_bfd_elf_get_reloc_section (asection *);
+extern asection *_bfd_elf_plt_get_reloc_section (bfd *, const char *);
extern int bfd_elf_get_default_section_type (flagword);
(unsigned int, unsigned int);
/* PowerPC elf_object_p tweak. */
extern bfd_boolean _bfd_elf_ppc_set_arch (bfd *);
+/* PowerPC .gnu.attributes handling common to both 32-bit and 64-bit. */
+extern void _bfd_elf_ppc_merge_fp_attributes (bfd *, struct bfd_link_info *);
-/* Exported interface for writing elf corefile notes. */
+/* Exported interface for writing elf corefile notes. */
extern char *elfcore_write_note
(bfd *, char *, int *, const char *, int, const void *, int);
extern char *elfcore_write_prpsinfo
extern void _bfd_elf_copy_obj_attributes (bfd *, bfd *);
extern int _bfd_elf_obj_attrs_arg_type (bfd *, int, unsigned int);
extern void _bfd_elf_parse_attributes (bfd *, Elf_Internal_Shdr *);
-extern bfd_boolean _bfd_elf_merge_object_attributes (bfd *, bfd *);
+extern bfd_boolean _bfd_elf_merge_object_attributes
+ (bfd *, struct bfd_link_info *);
extern bfd_boolean _bfd_elf_merge_unknown_attribute_low (bfd *, bfd *, int);
extern bfd_boolean _bfd_elf_merge_unknown_attribute_list (bfd *, bfd *);
extern Elf_Internal_Shdr *_bfd_elf_single_rel_hdr (asection *sec);
+extern bfd_boolean _bfd_elf_parse_gnu_properties
+ (bfd *, Elf_Internal_Note *);
+extern elf_property * _bfd_elf_get_property
+ (bfd *, unsigned int, unsigned int);
+extern bfd *_bfd_elf_link_setup_gnu_properties
+ (struct bfd_link_info *);
+
/* The linker may need to keep track of the number of relocs that it
decides to copy as dynamic relocs in check_relocs for each symbol.
This is so that it can later discard them if they are found to be
memmove (rel, rel + count, \
(relend - rel - count) * sizeof (*rel)); \
\
- input_section->reloc_count--; \
+ input_section->reloc_count -= count; \
relend -= count; \
rel--; \
continue; \
projects / deliverable / binutils-gdb.git / blobdiff