/* bfdlink.h -- header file for BFD link routines
- Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002, 2003
- Free Software Foundation, Inc.
+ Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002, 2003,
+ 2004 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.
{
/* 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
{
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. */
need much more time and therefore must be explicitly selected. */
unsigned int optimize: 1;
- /* TRUE if BFD should generate errors for undefined symbols
- even if generating a shared object. */
- unsigned int no_undefined: 1;
-
- /* 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. */
- unsigned int allow_shlib_undefined: 1;
-
/* TRUE if ok to have multiple definition. */
unsigned int allow_multiple_definition: 1;
/* TRUE if global symbols in discarded sections should be stripped. */
unsigned int strip_discarded: 1;
- /* TRUE if relaxation is being finalized. */
- unsigned int relax_finalizing: 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;
flags. */
unsigned int noexecstack: 1;
+ /* TRUE if PT_GNU_RELRO segment should be created. */
+ unsigned int relro: 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;
whether to include an object from an archive. */
enum bfd_link_common_skip_ar_aymbols common_skip_ar_aymbols;
+ /* 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. */
+ char wrap_char;
+
/* Function callbacks. */
const struct bfd_link_callbacks *callbacks;
unloaded. */
const char *fini_function;
- /* 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;
-
/* 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. */
/* May be used to set DT_FLAGS_1 for ELF. */
bfd_vma flags_1;
+
+ /* Start and end of RELRO region. */
+ bfd_vma relro_start, relro_end;
};
/* This structures holds a set of callback functions. These are
/* Section to include. If this is used, then
section->output_section must be the section the
link_order is attached to, section->output_offset must
- equal the link_order offset field, and section->_raw_size
+ equal the link_order offset field, and section->size
must equal the link_order size field. Maybe these
restrictions should be relaxed someday. */
asection *section;
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) (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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