/* BFD back-end data structures for ELF files.
- Copyright (C) 1992-2017 Free Software Foundation, Inc.
+ Copyright (C) 1992-2019 Free Software Foundation, Inc.
Written by Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
/* Symbol is __start_SECNAME or __stop_SECNAME to mark section
SECNAME. */
unsigned int start_stop : 1;
+ /* Symbol is or was a weak defined symbol from a dynamic object with
+ a strong defined symbol alias. U.ALIAS points to a list of aliases,
+ the definition having is_weakalias clear. */
+ unsigned int is_weakalias : 1;
/* String table index in .dynstr if this is a dynamic symbol. */
unsigned long dynstr_index;
union
{
- /* If this is a weak defined symbol from a dynamic object, this
- field points to a defined symbol with the same value, if there is
- one. Otherwise it is NULL. */
- struct elf_link_hash_entry *weakdef;
+ /* Points to a circular list of non-function symbol aliases. */
+ struct elf_link_hash_entry *alias;
/* Hash value of the name computed using the ELF hash function.
Used part way through size_dynamic_sections, after we've finished
- with weakdefs. */
+ with aliases. */
unsigned long elf_hash_value;
} u;
} u2;
};
+/* Return the strong definition for a weak symbol with aliases. */
+
+static inline struct elf_link_hash_entry *
+weakdef (struct elf_link_hash_entry *h)
+{
+ while (h->is_weakalias)
+ h = h->u.alias;
+ return h;
+}
+
/* Will references to this symbol always reference the symbol
in this object? */
#define SYMBOL_REFERENCES_LOCAL(INFO, H) \
#define SYMBOL_CALLS_LOCAL(INFO, H) \
_bfd_elf_symbol_refs_local_p (H, INFO, 1)
+/* Whether an undefined weak symbol should resolve to its link-time
+ value, even in PIC or PIE objects. */
+#define UNDEFWEAK_NO_DYNAMIC_RELOC(INFO, H) \
+ ((H)->root.type == bfd_link_hash_undefweak \
+ && (ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT \
+ || (INFO)->dynamic_undefined_weak == 0))
+
/* Common symbols that are turned into definitions don't have the
DEF_REGULAR flag set, so they might appear to be undefined.
Symbols defined in linker scripts also don't have DEF_REGULAR set. */
.eh_frame input section that contains the CIE. */
union {
struct cie *full_cie;
- struct eh_cie_fde *merged_with;
- asection *sec;
+ struct eh_cie_fde *merged_with;
+ asection *sec;
} u;
/* The offset of the personality data from the start of the CIE,
AVR_ELF_DATA,
BFIN_ELF_DATA,
CRIS_ELF_DATA,
+ CSKY_ELF_DATA,
FRV_ELF_DATA,
HPPA32_ELF_DATA,
HPPA64_ELF_DATA,
TIC6X_ELF_DATA,
X86_64_ELF_DATA,
XTENSA_ELF_DATA,
- XGATE_ELF_DATA,
TILEGX_ELF_DATA,
TILEPRO_ELF_DATA,
RISCV_ELF_DATA,
when linking against or generating a shared object. */
bfd_boolean dynamic_sections_created;
+ /* Whether dynamic relocations are present. */
+ bfd_boolean dynamic_relocs;
+
/* True if this target has relocatable executables, so needs dynamic
section symbols. */
bfd_boolean is_relocatable_executable;
#define elf_hash_table_id(table) ((table) -> hash_table_id)
/* Returns TRUE if the hash table is a struct elf_link_hash_table. */
-#define is_elf_hash_table(htab) \
+#define is_elf_hash_table(htab) \
(((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table)
/* Used by bfd_sym_from_r_symndx to cache a small number of local
};
#define elf_symbol_from(ABFD,S) \
- (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
- && (S)->the_bfd->tdata.elf_obj_data != 0) \
- ? (elf_symbol_type *) (S) \
- : 0)
+ (((S)->the_bfd != NULL \
+ && (S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
+ && (S)->the_bfd->tdata.elf_obj_data != 0) \
+ ? (elf_symbol_type *) (S) \
+ : 0)
enum elf_reloc_type_class {
reloc_class_normal,
/* The common page size for this backend. */
bfd_vma commonpagesize;
+ /* The value of commonpagesize to use when -z relro for this backend. */
+ bfd_vma relropagesize;
+
/* The BFD flags applied to sections created for dynamic linking. */
flagword dynamic_sec_flags;
const void *arch_data;
/* A function to translate an ELF RELA relocation to a BFD arelent
- structure. */
- void (*elf_info_to_howto)
+ structure. Returns TRUE upon success, FALSE otherwise. */
+ bfd_boolean (*elf_info_to_howto)
(bfd *, arelent *, Elf_Internal_Rela *);
/* A function to translate an ELF REL relocation to a BFD arelent
- structure. */
- void (*elf_info_to_howto_rel)
+ structure. Returns TRUE upon success, FALSE otherwise. */
+ bfd_boolean (*elf_info_to_howto_rel)
(bfd *, arelent *, Elf_Internal_Rela *);
/* A function to determine whether a symbol is global when
bfd_boolean (*gc_mark_extra_sections)
(struct bfd_link_info *, elf_gc_mark_hook_fn);
- /* This function, if defined, is called during the sweep phase of gc
- in order that a backend might update any data structures it might
- be maintaining. */
- bfd_boolean (*gc_sweep_hook)
- (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *);
-
/* This function, if defined, is called after the ELF headers have
been created. This allows for things like the OS and ABI versions
to be changed. */
bfd_boolean (*elf_backend_grok_psinfo)
(bfd *, Elf_Internal_Note *);
+ /* This function, if defined, is called when a "FreeBSD" NT_PRSTATUS
+ note is found in a core file. */
+ bfd_boolean (*elf_backend_grok_freebsd_prstatus)
+ (bfd *, Elf_Internal_Note *);
+
/* This function, if defined, is called to write a note to a corefile. */
char *(*elf_backend_write_core_note)
(bfd *abfd, char *buf, int *bufsiz, int note_type, ...);
(bfd *);
reloc_howto_type *(*elf_backend_mips_rtype_to_howto)
- (unsigned int, bfd_boolean);
+ (bfd *, unsigned int, bfd_boolean);
/* The swapping table to use when dealing with ECOFF information.
Used for the MIPS ELF .mdebug section. */
bfd_boolean (*elf_backend_copy_special_section_fields)
(const bfd *ibfd, bfd *obfd, const Elf_Internal_Shdr *isection,
Elf_Internal_Shdr *osection);
-
+
/* Used to handle bad SHF_LINK_ORDER input. */
void (*link_order_error_handler) (const char *, ...);
/* Set up GNU properties. */
bfd *(*setup_gnu_properties) (struct bfd_link_info *);
+ /* Fix up GNU properties. */
+ void (*fixup_gnu_properties) (struct bfd_link_info *,
+ elf_property_list **);
+
/* Encoding used for compact EH tables. */
int (*compact_eh_encoding) (struct bfd_link_info *);
/* True if `_bfd_elf_link_renumber_dynsyms' must be called even for
static binaries. */
unsigned always_renumber_dynsyms : 1;
+
+ /* True if the 32-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
+ members use a 16-bit data type. */
+ unsigned linux_prpsinfo32_ugid16 : 1;
+
+ /* True if the 64-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
+ members use a 16-bit data type. */
+ unsigned linux_prpsinfo64_ugid16 : 1;
};
/* Information about reloc sections associated with a bfd_elf_section_data
#define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
#define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
#define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
+#define elf_section_info(sec) (elf_section_data(sec)->this_hdr.sh_info)
#define elf_group_name(sec) (elf_section_data(sec)->group.name)
#define elf_group_id(sec) (elf_section_data(sec)->group.id)
#define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
/* The value of an object attribute. The type indicates whether the attribute
holds and integer, a string, or both. It can also indicate that there can
- be no default (i.e. all values must be written to file, even zero). */
+ be no default (i.e. all values must be written to file, even zero), or
+ that the value is in error and should not be written to file. */
typedef struct obj_attribute
{
#define ATTR_TYPE_FLAG_INT_VAL (1 << 0)
#define ATTR_TYPE_FLAG_STR_VAL (1 << 1)
#define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
+#define ATTR_TYPE_FLAG_ERROR (1 << 3)
#define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
#define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
#define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
+#define ATTR_TYPE_HAS_ERROR(TYPE) ((TYPE) & ATTR_TYPE_FLAG_ERROR)
int type;
unsigned int i;
typedef struct elf_section_list
{
- Elf_Internal_Shdr hdr;
- unsigned int ndx;
+ Elf_Internal_Shdr hdr;
+ unsigned int ndx;
struct elf_section_list * next;
} elf_section_list;
Elf_Internal_Shdr **group_sect_ptr;
int num_group;
+ /* Index into group_sect_ptr, updated by setup_group when finding a
+ section's group. Used to optimize subsequent group searches. */
+ unsigned int group_search_offset;
+
unsigned int symtab_section, dynsymtab_section;
unsigned int dynversym_section, dynverdef_section, dynverref_section;
/* An identifier used to distinguish different target
specific extensions to this structure. */
- enum elf_target_id object_id;
+ ENUM_BITFIELD (elf_target_id) object_id : 6;
/* Whether a dyanmic object was specified normally on the linker
command line, or was specified when --as-needed was in effect,
or was found via a DT_NEEDED entry. */
- enum dynamic_lib_link_class dyn_lib_class;
+ ENUM_BITFIELD (dynamic_lib_link_class) dyn_lib_class : 4;
+
+ /* Whether if the bfd contains symbols that have the STT_GNU_IFUNC
+ symbol type or STB_GNU_UNIQUE binding. */
+ ENUM_BITFIELD (elf_gnu_symbols) has_gnu_symbols : 3;
+
+ /* Whether if the bfd contains the GNU_PROPERTY_NO_COPY_ON_PROTECTED
+ property. */
+ unsigned int has_no_copy_on_protected : 1;
/* Irix 5 often screws up the symbol table, sorting local symbols
after global symbols. This flag is set if the symbol table in
this BFD appears to be screwed up. If it is, we ignore the
sh_info field in the symbol table header, and always read all the
symbols. */
- bfd_boolean bad_symtab;
-
- enum elf_gnu_symbols has_gnu_symbols;
+ unsigned int bad_symtab : 1;
/* Information grabbed from an elf core file. */
struct core_elf_obj_tdata *core;
#define elf_other_obj_attributes_proc(bfd) \
(elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
#define elf_properties(bfd) (elf_tdata (bfd) -> properties)
+#define elf_has_no_copy_on_protected(bfd) \
+ (elf_tdata(bfd) -> has_no_copy_on_protected)
\f
extern void _bfd_elf_swap_verdef_in
(bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *);
struct elf_link_hash_entry *);
extern void _bfd_elf_link_hash_hide_symbol
(struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean);
+extern void _bfd_elf_link_hide_symbol
+ (bfd *, struct bfd_link_info *, struct bfd_link_hash_entry *);
extern bfd_boolean _bfd_elf_link_hash_fixup_symbol
(struct bfd_link_info *, struct elf_link_hash_entry *);
extern bfd_boolean _bfd_elf_link_hash_table_init
extern const struct bfd_elf_special_section *_bfd_elf_get_sec_type_attr
(bfd *, asection *);
+extern bfd_boolean _bfd_elf_link_hide_sym_by_version
+ (struct bfd_link_info *, struct elf_link_hash_entry *);
+
/* If the target doesn't have reloc handling written yet: */
-extern void _bfd_elf_no_info_to_howto
+extern bfd_boolean _bfd_elf_no_info_to_howto
(bfd *, arelent *, Elf_Internal_Rela *);
extern bfd_boolean bfd_section_from_shdr
extern bfd_boolean _bfd_elf_link_create_dynamic_sections
(bfd *, struct bfd_link_info *);
-extern bfd_boolean _bfd_elf_link_omit_section_dynsym
+extern bfd_boolean _bfd_elf_omit_section_dynsym_default
+ (bfd *, struct bfd_link_info *, asection *);
+extern bfd_boolean _bfd_elf_omit_section_dynsym_all
(bfd *, struct bfd_link_info *, asection *);
extern bfd_boolean _bfd_elf_create_dynamic_sections
(bfd *, struct bfd_link_info *);
/* 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 *);
+extern bfd_boolean _bfd_elf_ppc_merge_fp_attributes
+ (bfd *, struct bfd_link_info *);
/* Exported interface for writing elf corefile notes. */
extern char *elfcore_write_note
(bfd *, char *, int *, const void *, int);
extern char *elfcore_write_ppc_vsx
(bfd *, char *, int *, const void *, int);
+extern char *elfcore_write_ppc_tar
+ (bfd *, char *, int *, const void *, int);
+extern char *elfcore_write_ppc_ppr
+ (bfd *, char *, int *, const void *, int);
+extern char *elfcore_write_ppc_dscr
+ (bfd *, char *, int *, const void *, int);
+extern char *elfcore_write_ppc_ebb
+ (bfd *, char *, int *, const void *, int);
+extern char *elfcore_write_ppc_pmu
+ (bfd *, char *, int *, const void *, int);
+extern char *elfcore_write_ppc_tm_cgpr
+ (bfd *, char *, int *, const void *, int);
+extern char *elfcore_write_ppc_tm_cfpr
+ (bfd *, char *, int *, const void *, int);
+extern char *elfcore_write_ppc_tm_cvmx
+ (bfd *, char *, int *, const void *, int);
+extern char *elfcore_write_ppc_tm_cvsx
+ (bfd *, char *, int *, const void *, int);
+extern char *elfcore_write_ppc_tm_spr
+ (bfd *, char *, int *, const void *, int);
+extern char *elfcore_write_ppc_tm_ctar
+ (bfd *, char *, int *, const void *, int);
+extern char *elfcore_write_ppc_tm_cppr
+ (bfd *, char *, int *, const void *, int);
+extern char *elfcore_write_ppc_tm_cdscr
+ (bfd *, char *, int *, const void *, int);
extern char *elfcore_write_s390_timer
(bfd *, char *, int *, const void *, int);
extern char *elfcore_write_s390_todcmp
(bfd *, char *, int *, const void *, int);
extern char *elfcore_write_aarch_hw_watch
(bfd *, char *, int *, const void *, int);
+extern char *elfcore_write_aarch_sve
+ (bfd *, char *, int *, const void *, int);
extern char *elfcore_write_lwpstatus
(bfd *, char *, int *, long, int, const void *);
extern char *elfcore_write_register_note
extern char *elfcore_write_linux_prpsinfo64
(bfd *, char *, int *, const struct elf_internal_linux_prpsinfo *);
-/* Linux/PPC32 uses different layout compared to most archs. */
-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_size_type size, bfd_vma *loadbasep,
int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type));
(bfd *, unsigned int, unsigned int);
extern bfd *_bfd_elf_link_setup_gnu_properties
(struct bfd_link_info *);
+extern bfd_size_type _bfd_elf_convert_gnu_property_size
+ (bfd *, bfd *);
+extern bfd_boolean _bfd_elf_convert_gnu_properties
+ (bfd *, asection *, bfd *, bfd_byte **, bfd_size_type *);
/* 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.
(struct bfd_link_info *, struct elf_link_hash_entry *,
struct elf_dyn_relocs **, bfd_boolean *, unsigned int,
unsigned int, unsigned int, bfd_boolean);
-extern long _bfd_elf_ifunc_get_synthetic_symtab
- (bfd *, long, asymbol **, long, asymbol **, asymbol **, asection *,
- bfd_vma *(*) (bfd *, asymbol **, asection *, asection *));
extern void elf_append_rela (bfd *, asection *, Elf_Internal_Rela *);
extern void elf_append_rel (bfd *, asection *, Elf_Internal_Rela *);
{ \
int i_; \
_bfd_clear_contents (howto, input_bfd, input_section, \
- contents + rel[index].r_offset); \
+ contents, rel[index].r_offset); \
\
if (bfd_link_relocatable (info) \
&& (input_section->flags & SEC_DEBUGGING)) \
projects / thirdparty / binutils-gdb.git / blobdiff