/* frags.h - Header file for the frag concept.
- Copyright (C) 1987 Free Software Foundation, Inc.
-
+ Copyright (C) 1987, 92, 93, 94, 95, 97, 98, 1999
+ Free Software Foundation, Inc.
+
This file is part of GAS, the GNU Assembler.
-
+
GAS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
-
+
GAS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
-
+
You should have received a copy of the GNU General Public License
- along with GAS; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+ 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. */
-extern struct obstack frags;
-/* Frags ONLY live in this obstack. */
-/* We use obstack_next_free() macro */
-/* so please don't put any other objects */
-/* on this stack! */
+#ifndef FRAGS_H
+#define FRAGS_H
+
+#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. */
+ symbolS *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 {
+ /* CGEN_INSN entry for this instruction. */
+ const struct cgen_insn *insn;
+ /* Index into operand table. */
+ int opindex;
+ /* Target specific data, usually reloc number. */
+ int 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 addressT frag_now_fix PARAMS ((void));
+
+/* For foreign-segment symbol fixups. */
+COMMON fragS zero_address_frag;
+/* For local common (N_BSS segment) fixups. */
+COMMON fragS bss_address_frag;
+
+#if 0
+/*
* A macro to speed up appending exactly 1 char
* to current frag.
*/
/* JF changed < 1 to <= 1 to avoid a race conditon */
#define FRAG_APPEND_1_CHAR(datum) \
{ \
- if (obstack_room( &frags ) <= 1) {\
- frag_wane (frag_now); \
- frag_new (0); \
- } \
- obstack_1grow( &frags, datum ); \
- }
-
-
-#ifdef __STDC__
-
-char *frag_more(int nchars);
-void frag_align(int alignment, int fill_character);
-void frag_new(int old_frags_var_max_size);
-void frag_wane(fragS *fragP);
-
-char *frag_variant(relax_stateT type,
- int max_chars,
- int var,
- relax_substateT subtype,
- symbolS *symbol,
- long offset,
- char *opcode,
- int pcrel_adjust,
- int bsr);
-
-char *frag_var(relax_stateT type,
- int max_chars,
- int var,
- relax_substateT subtype,
- symbolS *symbol,
- long offset,
- char *opcode);
-
-#else /* __STDC__ */
-
-char *frag_more();
-char *frag_var();
-char *frag_variant();
-void frag_align();
-void frag_new();
-void frag_wane();
-
-#endif /* __STDC__ */
+ if (obstack_room( &frags ) <= 1) {\
+ frag_wane (frag_now); \
+ frag_new (0); \
+ } \
+ obstack_1grow( &frags, datum ); \
+}
+#else
+extern void frag_append_1_char PARAMS ((int));
+#define FRAG_APPEND_1_CHAR(X) frag_append_1_char (X)
+#endif
-/*
- * Local Variables:
- * comment-column: 0
- * fill-column: 131
- * End:
- */
-/* end of frags.h */
+void frag_init PARAMS ((void));
+fragS *frag_alloc PARAMS ((struct obstack *));
+void frag_grow PARAMS ((unsigned int nchars));
+char *frag_more PARAMS ((int nchars));
+void frag_align PARAMS ((int alignment, int fill_character, int max));
+void frag_align_pattern PARAMS ((int alignment,
+ const char *fill_pattern,
+ int n_fill,
+ int max));
+void frag_new PARAMS ((int old_frags_var_max_size));
+void frag_wane PARAMS ((fragS * fragP));
+
+char *frag_variant PARAMS ((relax_stateT type,
+ int max_chars,
+ int var,
+ relax_substateT subtype,
+ symbolS * symbol,
+ offsetT offset,
+ char *opcode));
+
+char *frag_var PARAMS ((relax_stateT type,
+ int max_chars,
+ int var,
+ relax_substateT subtype,
+ symbolS * symbol,
+ offsetT offset,
+ char *opcode));
+
+#endif /* FRAGS_H */
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