+ along with GAS; see the file COPYING. If not, write to the Free
+ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+ 02111-1307, USA. */
+
+#ifdef ANSI_PROTOTYPES
+struct obstack;
+#endif
+
+/*
+ * A code fragment (frag) is some known number of chars, followed by some
+ * unknown number of chars. Typically the unknown number of chars is an
+ * instruction address whose size is yet unknown. We always know the greatest
+ * possible size the unknown number of chars may become, and reserve that
+ * much room at the end of the frag.
+ * Once created, frags do not change address during assembly.
+ * We chain the frags in (a) forward-linked list(s). The object-file address
+ * of the 1st char of a frag is generally not known until after relax().
+ * Many things at assembly time describe an address by {object-file-address
+ * of a particular frag}+offset.
+
+ BUG: it may be smarter to have a single pointer off to various different
+ notes for different frag kinds. See how code pans
+ */
+
+struct frag
+{
+ /* Object file address. */
+ addressT fr_address;
+ /* Chain forward; ascending address order. Rooted in frch_root. */
+ struct frag *fr_next;
+
+ /* (Fixed) number of chars we know we have. May be 0. */
+ offsetT fr_fix;
+ /* (Variable) number of chars after above. May be 0. */
+ offsetT fr_var;
+ /* For variable-length tail. */
+ struct symbol *fr_symbol;
+ /* For variable-length tail. */
+ offsetT fr_offset;
+ /* Points to opcode low addr byte, for relaxation. */
+ char *fr_opcode;
+
+#ifndef NO_LISTING
+ struct list_info_struct *line;
+#endif
+
+ /* What state is my tail in? */
+ relax_stateT fr_type;
+ relax_substateT fr_subtype;
+
+#ifdef USING_CGEN
+ /* Don't include this unless using CGEN to keep frag size down. */
+ struct {
+ const struct cgen_insn *insn;
+ unsigned char opindex, opinfo;
+ } fr_cgen;
+#endif
+
+#ifdef TC_FRAG_TYPE
+ TC_FRAG_TYPE tc_frag_data;
+#endif
+
+ /* Where the frag was created, or where it became a variant frag. */
+ char *fr_file;
+ unsigned int fr_line;
+
+ /* Data begins here. */
+ char fr_literal[1];
+};
+
+#define SIZEOF_STRUCT_FRAG \
+((char *)zero_address_frag.fr_literal-(char *)&zero_address_frag)
+/* We want to say fr_literal[0] above. */
+
+/* Current frag we are building. This frag is incomplete. It is,
+ however, included in frchain_now. The fr_fix field is bogus;
+ instead, use frag_now_fix (). */
+COMMON fragS *frag_now;
+extern int frag_now_fix PARAMS ((void));