/* bfdlink.h -- header file for BFD link routines
- Copyright (C) 1993-2015 Free Software Foundation, Inc.
+ Copyright (C) 1993-2016 Free Software Foundation, Inc.
Written by Steve Chamberlain and Ian Lance Taylor, Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
discard_all /* Discard all locals. */
};
+/* Whether to generate ELF common symbols with the STT_COMMON type
+ during a relocatable link. */
+enum bfd_link_elf_stt_common
+{
+ unchanged,
+ elf_stt_common,
+ no_elf_stt_common
+};
+
/* Describes the type of hash table entry structure being used.
Different hash table structure have different fields and so
support different linking features. */
automatically be non-NULL since the symbol will have been on the
undefined symbol list. */
struct bfd_link_hash_entry *next;
- bfd *abfd; /* BFD symbol was found in. */
+ /* BFD symbol was found in. */
+ bfd *abfd;
+ /* For __start_<name> and __stop_<name> symbols, the first
+ input section matching the name. */
+ asection *section;
} undef;
/* bfd_link_hash_defined, bfd_link_hash_defweak. */
struct
{
struct bfd_link_hash_entry *next;
- asection *section; /* Symbol section. */
- bfd_vma value; /* Symbol value. */
+ /* Symbol section. */
+ asection *section;
+ /* Symbol value. */
+ bfd_vma value;
} def;
/* bfd_link_hash_indirect, bfd_link_hash_warning. */
struct
{
struct bfd_link_hash_entry *next;
- struct bfd_link_hash_entry *link; /* Real symbol. */
- const char *warning; /* Warning (bfd_link_hash_warning only). */
+ /* Real symbol. */
+ struct bfd_link_hash_entry *link;
+ /* Warning message (bfd_link_hash_warning only). */
+ const char *warning;
} i;
/* bfd_link_hash_common. */
struct
the union; this structure is a major space user in the
linker. */
struct bfd_link_hash_common_entry *p;
- bfd_size_type size; /* Common symbol size. */
+ /* Common symbol size. */
+ bfd_size_type size;
} c;
} u;
};
/* Read symbols and cache symbol pointer array in outsymbols. */
extern bfd_boolean bfd_generic_link_read_symbols (bfd *);
+/* Check the relocs in the BFD. Called after all the input
+ files have been loaded, and garbage collection has tagged
+ any unneeded sections. */
+extern bfd_boolean bfd_link_check_relocs (bfd *,struct bfd_link_info *);
+
struct bfd_sym_chain
{
struct bfd_sym_chain *next;
enum output_type
{
- type_executable = 0,
+ type_pde,
+ type_pie,
+ type_relocatable,
type_dll,
- type_relocatable
};
-#define bfd_link_executable(info) ((info)->type == type_executable)
+#define bfd_link_pde(info) ((info)->type == type_pde)
#define bfd_link_dll(info) ((info)->type == type_dll)
#define bfd_link_relocatable(info) ((info)->type == type_relocatable)
-#define bfd_link_pic(info) (info)->pic
-#define bfd_link_pie(info) (bfd_link_executable (info) \
- && bfd_link_pic (info))
-#define bfd_link_pde(info) (bfd_link_executable (info) \
- && !bfd_link_pic (info))
+#define bfd_link_pie(info) ((info)->type == type_pie)
+#define bfd_link_executable(info) (bfd_link_pde (info) || bfd_link_pie (info))
+#define bfd_link_pic(info) (bfd_link_dll (info) || bfd_link_pie (info))
/* This structure holds all the information needed to communicate
between BFD and the linker when doing a link. */
/* Output type. */
ENUM_BITFIELD (output_type) type : 2;
- /* TRUE if BFD should generate a position independent object. */
- unsigned int pic : 1;
-
/* TRUE if BFD should pre-bind symbols in a shared object. */
unsigned int symbolic: 1;
/* Which local symbols to discard. */
ENUM_BITFIELD (bfd_link_discard) discard : 2;
+ /* Whether to generate ELF common symbols with the STT_COMMON type. */
+ ENUM_BITFIELD (bfd_link_elf_stt_common) elf_stt_common : 2;
+
/* Criteria for skipping symbols when determining
whether to include an object from an archive. */
ENUM_BITFIELD (bfd_link_common_skip_ar_symbols) common_skip_ar_symbols : 2;
/* TRUE if the linker script contained an explicit PHDRS command. */
unsigned int user_phdrs: 1;
+ /* TRUE if we should check relocations after all input files have
+ been opened. */
+ unsigned int check_relocs_after_open_input: 1;
+
/* TRUE if BND prefix in PLT entries is always generated. */
unsigned int bndplt: 1;
+ /* TRUE if generation of .interp/PT_INTERP should be suppressed. */
+ unsigned int nointerp: 1;
+
+ /* TRUE if we shouldn't check relocation overflow. */
+ unsigned int no_reloc_overflow_check: 1;
+
+ /* TRUE if generate a 1-byte NOP as suffix for x86 call instruction. */
+ unsigned int call_nop_as_suffix : 1;
+
+ /* The 1-byte NOP for x86 call instruction. */
+ char call_nop_byte;
+
/* Char that may appear as the first char of a symbol, but should be
skipped (like symbol_leading_char) when looking up symbols in
wrap_hash. Used by PowerPC Linux for 'dot' symbols. */
backend to decide. */
int extern_protected_data;
+ /* > 0 to treat undefined weak symbol in the executable as dynamic,
+ requiring dynamic relocation. */
+ int dynamic_undefined_weak;
+
/* Non-zero if auto-import thunks for DATA items in pei386 DLLs
should be generated/linked against. Set to 1 if this feature
is explicitly requested by the user, -1 if enabled by default. */
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