/* frags.h - Header file for the frag concept.
- Copyright (C) 1987, 92, 93, 94, 95, 97, 98, 99, 2000
- Free Software Foundation, Inc.
+ Copyright (C) 1987-2016 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)
+ the Free Software Foundation; either version 3, or (at your option)
any later version.
GAS is distributed in the hope that it will be useful,
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, 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA. */
+ Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
+ 02110-1301, USA. */
#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 (as an octet offset). */
+/* 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 (as an octet offset). */
addressT fr_address;
- /* Chain forward; ascending address order. Rooted in frch_root. */
- struct frag *fr_next;
+ /* When relaxing multiple times, remember the address the frag had
+ in the last relax pass. */
+ addressT last_fr_address;
- /* (Fixed) number of octets we know we have. May be 0. */
+ /* (Fixed) number of octets we know we have. May be 0. */
offsetT fr_fix;
/* May be used for (Variable) number of octets after above.
The generic frag handling code no longer makes any use of fr_var. */
offsetT fr_var;
- /* For variable-length tail. */
- symbolS *fr_symbol;
- /* For variable-length tail. */
+ /* For variable-length tail. */
offsetT fr_offset;
+ /* For variable-length tail. */
+ symbolS *fr_symbol;
/* Points to opcode low addr byte, for relaxation. */
char *fr_opcode;
+ /* Chain forward; ascending address order. Rooted in frch_root. */
+ struct frag *fr_next;
+
+ /* Where the frag was created, or where it became a variant frag. */
+ char *fr_file;
+ unsigned int fr_line;
+
#ifndef NO_LISTING
struct list_info_struct *line;
#endif
+ /* A serial number for a sequence of frags having at most one alignment
+ or org frag, and that at the tail of the sequence. */
+ unsigned int region:16;
+
+ /* Flipped each relax pass so we can easily determine whether
+ fr_address has been adjusted. */
+ unsigned int relax_marker:1;
+
+ /* Used to ensure that all insns are emitted on proper address
+ boundaries. */
+ unsigned int has_code:1;
+ unsigned int insn_addr:6;
+
/* What state is my tail in? */
relax_stateT fr_type;
relax_substateT fr_subtype;
#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;
+#ifdef OBJ_FRAG_TYPE
+ OBJ_FRAG_TYPE obj_frag_data;
+#endif
/* 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. */
+((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));
-extern addressT frag_now_fix_octets PARAMS ((void));
+extern addressT frag_now_fix (void);
+extern addressT frag_now_fix_octets (void);
-/* For foreign-segment symbol fixups. */
+/* 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 ); \
-}
-#else
-extern void frag_append_1_char PARAMS ((int));
-#define FRAG_APPEND_1_CHAR(X) frag_append_1_char (X)
-#endif
+COMMON fragS predefined_address_frag;
+extern void frag_append_1_char (int);
+#define FRAG_APPEND_1_CHAR(X) frag_append_1_char (X)
-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));
+void frag_init (void);
+fragS *frag_alloc (struct obstack *);
+void frag_grow (size_t nchars);
+char *frag_more (size_t nchars);
+void frag_align (int alignment, int fill_character, int max);
+void frag_align_pattern (int alignment, const char *fill_pattern,
+ size_t n_fill, int max);
+void frag_align_code (int alignment, int max);
+void frag_new (size_t old_frags_var_max_size);
+void frag_wane (fragS * fragP);
+size_t frag_room (void);
+
+char *frag_variant (relax_stateT type,
+ size_t max_chars,
+ size_t var,
+ relax_substateT subtype,
+ symbolS * symbol,
+ offsetT offset,
+ char *opcode);
+
+char *frag_var (relax_stateT type,
+ size_t max_chars,
+ size_t var,
+ relax_substateT subtype,
+ symbolS * symbol,
+ offsetT offset,
+ char *opcode);
+
+bfd_boolean frag_offset_fixed_p (const fragS *, const fragS *, offsetT *);
+
+int get_frag_count (void);
+void clear_frag_count (void);
#endif /* FRAGS_H */
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