/* bfdlink.h -- header file for BFD link routines
- Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002
+ Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002, 2003
Free Software Foundation, Inc.
Written by Steve Chamberlain and Ian Lance Taylor, Cygnus Support.
{
/* Base hash table entry structure. */
struct bfd_hash_entry root;
+
/* Type of this entry. */
enum bfd_link_hash_type type;
symbol is undefined and becomes defined, this field will
automatically be non-NULL since the symbol will have been on the
undefined symbol list. */
- struct bfd_link_hash_entry *next;
+ struct bfd_link_hash_entry *und_next;
+
/* A union of information depending upon the type. */
union
{
struct bfd_link_hash_entry *undefs;
/* Entries are added to the tail of the undefs list. */
struct bfd_link_hash_entry *undefs_tail;
- /* The type of the ink hash table. */
+ /* The type of the link hash table. */
enum bfd_link_hash_table_type type;
};
follows bfd_link_hash_indirect and bfd_link_hash_warning links to
the real symbol. */
extern struct bfd_link_hash_entry *bfd_link_hash_lookup
- PARAMS ((struct bfd_link_hash_table *, const char *, bfd_boolean create,
- bfd_boolean copy, bfd_boolean follow));
+ (struct bfd_link_hash_table *, const char *, bfd_boolean create,
+ bfd_boolean copy, bfd_boolean follow);
/* Look up an entry in the main linker hash table if the symbol might
be wrapped. This should only be used for references to an
undefined symbol, not for definitions of a symbol. */
extern struct bfd_link_hash_entry *bfd_wrapped_link_hash_lookup
- PARAMS ((bfd *, struct bfd_link_info *, const char *, bfd_boolean,
- bfd_boolean, bfd_boolean));
+ (bfd *, struct bfd_link_info *, const char *, bfd_boolean,
+ bfd_boolean, bfd_boolean);
/* Traverse a link hash table. */
extern void bfd_link_hash_traverse
- PARAMS ((struct bfd_link_hash_table *,
- bfd_boolean (*) (struct bfd_link_hash_entry *, PTR),
- PTR));
+ (struct bfd_link_hash_table *,
+ bfd_boolean (*) (struct bfd_link_hash_entry *, void *),
+ void *);
/* Add an entry to the undefs list. */
extern void bfd_link_add_undef
- PARAMS ((struct bfd_link_hash_table *, struct bfd_link_hash_entry *));
+ (struct bfd_link_hash_table *, struct bfd_link_hash_entry *);
struct bfd_sym_chain
{
const char *name;
};
\f
+/* How to handle unresolved symbols.
+ There are four possibilities which are enumerated below: */
+enum report_method
+{
+ /* This is the initial value when then link_info structure is created.
+ It allows the various stages of the linker to determine whether they
+ allowed to set the value. */
+ RM_NOT_YET_SET = 0,
+ RM_IGNORE,
+ RM_GENERATE_WARNING,
+ RM_GENERATE_ERROR
+};
+
/* This structure holds all the information needed to communicate
between BFD and the linker when doing a link. */
struct bfd_link_info
{
- /* Function callbacks. */
- const struct bfd_link_callbacks *callbacks;
-
- /* TRUE if BFD should generate a relocateable object file. */
- bfd_boolean relocateable;
+ /* TRUE if BFD should generate a relocatable object file. */
+ unsigned int relocatable: 1;
/* TRUE if BFD should generate relocation information in the final
executable. */
- bfd_boolean emitrelocations;
+ unsigned int emitrelocations: 1;
/* TRUE if BFD should generate a "task linked" object file,
similar to relocatable but also with globals converted to
statics. */
- bfd_boolean task_link;
+ unsigned int task_link: 1;
/* TRUE if BFD should generate a shared object. */
- bfd_boolean shared;
+ unsigned int shared: 1;
/* TRUE if BFD should pre-bind symbols in a shared object. */
- bfd_boolean symbolic;
+ unsigned int symbolic: 1;
/* TRUE if BFD should export all symbols in the dynamic symbol table
of an executable, rather than only those used. */
- bfd_boolean export_dynamic;
+ unsigned int export_dynamic: 1;
/* TRUE if shared objects should be linked directly, not shared. */
- bfd_boolean static_link;
+ unsigned int static_link: 1;
/* TRUE if the output file should be in a traditional format. This
is equivalent to the setting of the BFD_TRADITIONAL_FORMAT flag
on the output file, but may be checked when reading the input
files. */
- bfd_boolean traditional_format;
+ unsigned int traditional_format: 1;
/* TRUE if we want to produced optimized output files. This might
need much more time and therefore must be explicitly selected. */
- bfd_boolean optimize;
-
- /* TRUE if BFD should generate errors for undefined symbols
- even if generating a shared object. */
- bfd_boolean no_undefined;
-
- /* TRUE if BFD should allow undefined symbols in shared objects even
- when no_undefined is set to disallow undefined symbols. The net
- result will be that undefined symbols in regular objects will
- still trigger an error, but undefined symbols in shared objects
- will be ignored. The implementation of no_undefined makes the
- assumption that the runtime linker will choke on undefined
- symbols. However there is at least one system (BeOS) where
- undefined symbols in shared libraries is normal since the kernel
- patches them at load time to select which function is most
- appropriate for the current architecture. I.E. dynamically
- select an appropriate memset function. Apparently it is also
- normal for HPPA shared libraries to have undefined symbols. */
- bfd_boolean allow_shlib_undefined;
+ unsigned int optimize: 1;
/* TRUE if ok to have multiple definition. */
- bfd_boolean allow_multiple_definition;
+ unsigned int allow_multiple_definition: 1;
/* TRUE if ok to have version with no definition. */
- bfd_boolean allow_undefined_version;
+ unsigned int allow_undefined_version: 1;
+
+ /* TRUE if symbols should be retained in memory, FALSE if they
+ should be freed and reread. */
+ unsigned int keep_memory: 1;
+
+ /* TRUE if every symbol should be reported back via the notice
+ callback. */
+ unsigned int notice_all: 1;
+
+ /* TRUE if executable should not contain copy relocs.
+ Setting this true may result in a non-sharable text segment. */
+ unsigned int nocopyreloc: 1;
+
+ /* TRUE if the new ELF dynamic tags are enabled. */
+ unsigned int new_dtags: 1;
+
+ /* TRUE if non-PLT relocs should be merged into one reloc section
+ and sorted so that relocs against the same symbol come together. */
+ unsigned int combreloc: 1;
+
+ /* TRUE if .eh_frame_hdr section and PT_GNU_EH_FRAME ELF segment
+ should be created. */
+ unsigned int eh_frame_hdr: 1;
+
+ /* TRUE if global symbols in discarded sections should be stripped. */
+ unsigned int strip_discarded: 1;
+
+ /* TRUE if the final relax pass is needed. */
+ unsigned int need_relax_finalize: 1;
+
+ /* TRUE if generating a position independent executable. */
+ unsigned int pie: 1;
+
+ /* TRUE if generating an executable, position independent or not. */
+ unsigned int executable : 1;
+
+ /* TRUE if PT_GNU_STACK segment should be created with PF_R|PF_W|PF_X
+ flags. */
+ unsigned int execstack: 1;
+
+ /* TRUE if PT_GNU_STACK segment should be created with PF_R|PF_W
+ flags. */
+ unsigned int noexecstack: 1;
+
+ /* What to do with unresolved symbols in an object file.
+ When producing executables the default is GENERATE_ERROR.
+ When producing shared libraries the default is IGNORE. The
+ assumption with shared libraries is that the reference will be
+ resolved at load/execution time. */
+ enum report_method unresolved_syms_in_objects;
+
+ /* What to do with unresolved symbols in a shared library.
+ The same defaults apply. */
+ enum report_method unresolved_syms_in_shared_libs;
/* Which symbols to strip. */
enum bfd_link_strip strip;
/* Which local symbols to discard. */
enum bfd_link_discard discard;
- /* TRUE if symbols should be retained in memory, FALSE if they
- should be freed and reread. */
- bfd_boolean keep_memory;
-
- /* The list of input BFD's involved in the link. These are chained
- together via the link_next field. */
- bfd *input_bfds;
-
- /* If a symbol should be created for each input BFD, this is section
- where those symbols should be placed. It must be a section in
- the output BFD. It may be NULL, in which case no such symbols
- will be created. This is to support CREATE_OBJECT_SYMBOLS in the
- linker command language. */
- asection *create_object_symbols_section;
+ /* Criteria for skipping symbols when detemining
+ whether to include an object from an archive. */
+ enum bfd_link_common_skip_ar_aymbols common_skip_ar_aymbols;
- /* List of global symbol names that are starting points for marking
- sections against garbage collection. */
- struct bfd_sym_chain *gc_sym_list;
+ /* Function callbacks. */
+ const struct bfd_link_callbacks *callbacks;
/* Hash table handled by BFD. */
struct bfd_link_hash_table *hash;
strip_some. */
struct bfd_hash_table *keep_hash;
- /* TRUE if every symbol should be reported back via the notice
- callback. */
- bfd_boolean notice_all;
-
/* Hash table of symbols to report back via the notice callback. If
this is NULL, and notice_all is FALSE, then no symbols are
reported back. */
option). If this is NULL, no symbols are being wrapped. */
struct bfd_hash_table *wrap_hash;
- /* If a base output file is wanted, then this points to it */
- PTR base_file;
+ /* The list of input BFD's involved in the link. These are chained
+ together via the link_next field. */
+ bfd *input_bfds;
- /* If non-zero, specifies that branches which are problematic for the
- MPC860 C0 (or earlier) should be checked for and modified. It gives the
- number of bytes that should be checked at the end of each text page. */
- int mpc860c0;
+ /* If a symbol should be created for each input BFD, this is section
+ where those symbols should be placed. It must be a section in
+ the output BFD. It may be NULL, in which case no such symbols
+ will be created. This is to support CREATE_OBJECT_SYMBOLS in the
+ linker command language. */
+ asection *create_object_symbols_section;
+
+ /* List of global symbol names that are starting points for marking
+ sections against garbage collection. */
+ struct bfd_sym_chain *gc_sym_list;
+
+ /* If a base output file is wanted, then this points to it */
+ void *base_file;
/* The function to call when the executable or shared object is
loaded. */
unloaded. */
const char *fini_function;
- /* TRUE if the new ELF dynamic tags are enabled. */
- bfd_boolean new_dtags;
-
- /* May be used to set DT_FLAGS for ELF. */
- bfd_vma flags;
-
- /* May be used to set DT_FLAGS_1 for ELF. */
- bfd_vma flags_1;
-
/* 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. */
is explicitly requested by the user, -1 if enabled by default. */
int pei386_runtime_pseudo_reloc;
- /* TRUE if non-PLT relocs should be merged into one reloc section
- and sorted so that relocs against the same symbol come together. */
- bfd_boolean combreloc;
-
- /* TRUE if executable should not contain copy relocs.
- Setting this true may result in a non-sharable text segment. */
- bfd_boolean nocopyreloc;
-
- /* TRUE if .eh_frame_hdr section and PT_GNU_EH_FRAME ELF segment
- should be created. */
- bfd_boolean eh_frame_hdr;
-
/* How many spare .dynamic DT_NULL entries should be added? */
unsigned int spare_dynamic_tags;
- /* Criteria for skipping symbols when detemining
- whether to include an object from an archive. */
- enum bfd_link_common_skip_ar_aymbols common_skip_ar_aymbols;
+ /* May be used to set DT_FLAGS for ELF. */
+ bfd_vma flags;
+
+ /* May be used to set DT_FLAGS_1 for ELF. */
+ bfd_vma flags_1;
};
/* This structures holds a set of callback functions. These are
name of the symbol which caused the archive element to be pulled
in. */
bfd_boolean (*add_archive_element)
- PARAMS ((struct bfd_link_info *, bfd *abfd, const char *name));
+ (struct bfd_link_info *, bfd *abfd, const char *name);
/* A function which is called when a symbol is found with multiple
definitions. NAME is the symbol which is defined multiple times.
OBFD is the old BFD, OSEC is the old section, OVAL is the old
the new value. OBFD may be NULL. OSEC and NSEC may be
bfd_com_section or bfd_ind_section. */
bfd_boolean (*multiple_definition)
- PARAMS ((struct bfd_link_info *, const char *name,
- bfd *obfd, asection *osec, bfd_vma oval,
- bfd *nbfd, asection *nsec, bfd_vma nval));
+ (struct bfd_link_info *, const char *name,
+ bfd *obfd, asection *osec, bfd_vma oval,
+ bfd *nbfd, asection *nsec, bfd_vma nval);
/* A function which is called when a common symbol is defined
multiple times. NAME is the symbol appearing multiple times.
OBFD is the BFD of the existing symbol; it may be NULL if this is
bfd_link_hash_indirect. If NTYPE is bfd_link_hash_common, NSIZE
is the size of the new symbol. */
bfd_boolean (*multiple_common)
- PARAMS ((struct bfd_link_info *, const char *name,
- bfd *obfd, enum bfd_link_hash_type otype, bfd_vma osize,
- bfd *nbfd, enum bfd_link_hash_type ntype, bfd_vma nsize));
+ (struct bfd_link_info *, const char *name,
+ bfd *obfd, enum bfd_link_hash_type otype, bfd_vma osize,
+ bfd *nbfd, enum bfd_link_hash_type ntype, bfd_vma nsize);
/* A function which is called to add a symbol to a set. ENTRY is
the link hash table entry for the set itself (e.g.,
__CTOR_LIST__). RELOC is the relocation to use for an entry in
- the set when generating a relocateable file, and is also used to
+ the set when generating a relocatable file, and is also used to
get the size of the entry when generating an executable file.
ABFD, SEC and VALUE identify the value to add to the set. */
bfd_boolean (*add_to_set)
- PARAMS ((struct bfd_link_info *, struct bfd_link_hash_entry *entry,
- bfd_reloc_code_real_type reloc, bfd *abfd, asection *sec,
- bfd_vma value));
+ (struct bfd_link_info *, struct bfd_link_hash_entry *entry,
+ bfd_reloc_code_real_type reloc, bfd *abfd, asection *sec, bfd_vma value);
/* A function which is called when the name of a g++ constructor or
destructor is found. This is only called by some object file
formats. CONSTRUCTOR is TRUE for a constructor, FALSE for a
destructor. This will use BFD_RELOC_CTOR when generating a
- relocateable file. NAME is the name of the symbol found. ABFD,
+ relocatable file. NAME is the name of the symbol found. ABFD,
SECTION and VALUE are the value of the symbol. */
bfd_boolean (*constructor)
- PARAMS ((struct bfd_link_info *, bfd_boolean constructor,
- const char *name, bfd *abfd, asection *sec, bfd_vma value));
+ (struct bfd_link_info *, bfd_boolean constructor, const char *name,
+ bfd *abfd, asection *sec, bfd_vma value);
/* A function which is called to issue a linker warning. For
example, this is called when there is a reference to a warning
symbol. WARNING is the warning to be issued. SYMBOL is the name
which trigerred the warning; either ABFD or SECTION or both may
be NULL if the location is not known. */
bfd_boolean (*warning)
- PARAMS ((struct bfd_link_info *, const char *warning, const char *symbol,
- bfd *abfd, asection *section, bfd_vma address));
+ (struct bfd_link_info *, const char *warning, const char *symbol,
+ bfd *abfd, asection *section, bfd_vma address);
/* A function which is called when a relocation is attempted against
an undefined symbol. NAME is the symbol which is undefined.
ABFD, SECTION and ADDRESS identify the location from which the
reference is made. FATAL indicates whether an undefined symbol is
a fatal error or not. In some cases SECTION may be NULL. */
bfd_boolean (*undefined_symbol)
- PARAMS ((struct bfd_link_info *, const char *name, bfd *abfd,
- asection *section, bfd_vma address, bfd_boolean fatal));
+ (struct bfd_link_info *, const char *name, bfd *abfd,
+ asection *section, bfd_vma address, bfd_boolean fatal);
/* A function which is called when a reloc overflow occurs. NAME is
the name of the symbol or section the reloc is against,
RELOC_NAME is the name of the relocation, and ADDEND is any
bfd_section_reloc_link_order or bfd_symbol_reloc_link_order, then
ABFD will be NULL. */
bfd_boolean (*reloc_overflow)
- PARAMS ((struct bfd_link_info *, const char *name, const char *reloc_name,
- bfd_vma addend, bfd *abfd, asection *section, bfd_vma address));
+ (struct bfd_link_info *, const char *name, const char *reloc_name,
+ bfd_vma addend, bfd *abfd, asection *section, bfd_vma address);
/* A function which is called when a dangerous reloc is performed.
The canonical example is an a29k IHCONST reloc which does not
follow an IHIHALF reloc. MESSAGE is an appropriate message.
bfd_section_reloc_link_order or bfd_symbol_reloc_link_order, then
ABFD will be NULL. */
bfd_boolean (*reloc_dangerous)
- PARAMS ((struct bfd_link_info *, const char *message,
- bfd *abfd, asection *section, bfd_vma address));
+ (struct bfd_link_info *, const char *message,
+ bfd *abfd, asection *section, bfd_vma address);
/* A function which is called when a reloc is found to be attached
to a symbol which is not being written out. NAME is the name of
the symbol. ABFD, SECTION and ADDRESS identify the location of
bfd_section_reloc_link_order or bfd_symbol_reloc_link_order, then
ABFD will be NULL. */
bfd_boolean (*unattached_reloc)
- PARAMS ((struct bfd_link_info *, const char *name,
- bfd *abfd, asection *section, bfd_vma address));
+ (struct bfd_link_info *, const char *name,
+ bfd *abfd, asection *section, bfd_vma address);
/* A function which is called when a symbol in notice_hash is
defined or referenced. NAME is the symbol. ABFD, SECTION and
ADDRESS are the value of the symbol. If SECTION is
bfd_und_section, this is a reference. */
bfd_boolean (*notice)
- PARAMS ((struct bfd_link_info *, const char *name,
- bfd *abfd, asection *section, bfd_vma address));
+ (struct bfd_link_info *, const char *name,
+ bfd *abfd, asection *section, bfd_vma address);
+ /* A function which is called for reporting a linker error. ID is the
+ error identifier. The remaining input is the same as einfo () in
+ ld. */
+ bfd_boolean (*error_handler)
+ (int id, const char *fmt, ...);
+
+/* Identifiers of linker error messages used by error_handler. */
+#define LD_DEFINITION_IN_DISCARDED_SECTION 1
};
\f
/* The linker builds link_order structures which tell the code how to
};
/* Allocate a new link_order for a section. */
-extern struct bfd_link_order *bfd_new_link_order PARAMS ((bfd *, asection *));
+extern struct bfd_link_order *bfd_new_link_order (bfd *, asection *);
/* These structures are used to describe version information for the
ELF linker. These structures could be manipulated entirely inside
BFD, but it would be a pain. Instead, the regular linker sets up
these structures, and then passes them into BFD. */
-/* Regular expressions for a version. */
+/* Glob pattern for a version. */
struct bfd_elf_version_expr
{
- /* Next regular expression for this version. */
+ /* Next glob pattern for this version. */
struct bfd_elf_version_expr *next;
- /* Regular expression. */
+ /* Glob pattern. */
const char *pattern;
- /* Matching function. */
- int (*match) PARAMS ((struct bfd_elf_version_expr *, const char *));
+ /* NULL for a glob pattern, otherwise a straight symbol. */
+ const char *symbol;
/* Defined by ".symver". */
- unsigned int symver: 1;
+ unsigned int symver : 1;
/* Defined by version script. */
unsigned int script : 1;
+ /* Pattern type. */
+#define BFD_ELF_VERSION_C_TYPE 1
+#define BFD_ELF_VERSION_CXX_TYPE 2
+#define BFD_ELF_VERSION_JAVA_TYPE 4
+ unsigned int mask : 3;
+};
+
+struct bfd_elf_version_expr_head
+{
+ /* List of all patterns, both wildcards and non-wildcards. */
+ struct bfd_elf_version_expr *list;
+ /* Hash table for non-wildcards. */
+ void *htab;
+ /* Remaining patterns. */
+ struct bfd_elf_version_expr *remaining;
+ /* What kind of pattern types are present in list (bitmask). */
+ unsigned int mask;
};
/* Version dependencies. */
/* Version number. */
unsigned int vernum;
/* Regular expressions for global symbols in this version. */
- struct bfd_elf_version_expr *globals;
+ struct bfd_elf_version_expr_head globals;
/* Regular expressions for local symbols in this version. */
- struct bfd_elf_version_expr *locals;
+ struct bfd_elf_version_expr_head locals;
/* List of versions which this version depends upon. */
struct bfd_elf_version_deps *deps;
/* Index of the version name. This is used within BFD. */
unsigned int name_indx;
/* Whether this version tree was used. This is used within BFD. */
int used;
+ /* Matching hook. */
+ struct bfd_elf_version_expr *(*match)
+ (struct bfd_elf_version_expr_head *head,
+ struct bfd_elf_version_expr *prev, const char *sym);
};
#endif
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