An asymbol has the form:
.
typedef struct symbol_cache_entry
{
/* A pointer to the BFD which owns the symbol. This information
is necessary so that a back end can work out what additional
information (invisible to the application writer) is carried
with the symbol.
This field is *almost* redundant, since you can use section->owner
instead, except that some symbols point to the global sections
bfd_{abs,com,und}_section. This could be fixed by making
these globals be per-bfd (or per-target-flavor). FIXME. */
struct _bfd *the_bfd; /* Use bfd_asymbol_bfd(sym) to access this field. */
/* The text of the symbol. The name is left alone, and not copied; the
application may not alter it. */
CONST char *name;
/* The value of the symbol. This really should be a union of a
numeric value with a pointer, since some flags indicate that
a pointer to another symbol is stored here. */
symvalue value;
/* Attributes of a symbol: */
#define BSF_NO_FLAGS 0x00
/* The symbol has local scope; static in C. The value
is the offset into the section of the data. */
#define BSF_LOCAL 0x01
/* The symbol has global scope; initialized data in C. The
value is the offset into the section of the data. */
#define BSF_GLOBAL 0x02
/* The symbol has global scope and is exported. The value is
the offset into the section of the data. */
#define BSF_EXPORT BSF_GLOBAL /* no real difference */
/* A normal C symbol would be one of:
BSF_LOCAL, BSF_FORT_COMM, BSF_UNDEFINED or
BSF_GLOBAL */
/* The symbol is a debugging record. The value has an arbitary
meaning. */
#define BSF_DEBUGGING 0x08
/* The symbol denotes a function entry point. Used in ELF,
perhaps others someday. */
#define BSF_FUNCTION 0x10
/* Used by the linker. */
#define BSF_KEEP 0x20
#define BSF_KEEP_G 0x40
/* A weak global symbol, overridable without warnings by
a regular global symbol of the same name. */
#define BSF_WEAK 0x80
/* This symbol was created to point to a section, e.g. ELF's
STT_SECTION symbols. */
#define BSF_SECTION_SYM 0x100
/* The symbol used to be a common symbol, but now it is
allocated. */
#define BSF_OLD_COMMON 0x200
/* The default value for common data. */
#define BFD_FORT_COMM_DEFAULT_VALUE 0
/* In some files the type of a symbol sometimes alters its
location in an output file - ie in coff a ISFCN symbol
which is also C_EXT symbol appears where it was
declared and not at the end of a section. This bit is set
by the target BFD part to convey this information. */
#define BSF_NOT_AT_END 0x400
/* Signal that the symbol is the label of constructor section. */
#define BSF_CONSTRUCTOR 0x800
/* Signal that the symbol is a warning symbol. The name is a
warning. The name of the next symbol is the one to warn about;
if a reference is made to a symbol with the same name as the next
symbol, a warning is issued by the linker. */
#define BSF_WARNING 0x1000
/* Signal that the symbol is indirect. This symbol is an indirect
pointer to the symbol with the same name as the next symbol. */
#define BSF_INDIRECT 0x2000
/* BSF_FILE marks symbols that contain a file name. This is used
for ELF STT_FILE symbols. */
#define BSF_FILE 0x4000
/* Symbol is from dynamic linking information. */
#define BSF_DYNAMIC 0x8000
/* The symbol denotes a data object. Used in ELF, and perhaps
others someday. */
#define BSF_OBJECT 0x10000
flagword flags;
/* A pointer to the section to which this symbol is
relative. This will always be non NULL, there are special
sections for undefined and absolute symbols. */
struct sec *section;
/* Back end special data. */
union
{
PTR p;
bfd_vma i;
} udata;
} asymbol;
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