19990502 sourceware importbinu_ss_19990502

1 files changed, 158 insertions, 0 deletions

diff --git a/gas/frags.h b/gas/frags.h
new file mode 100644
index 0000000..9590292
--- /dev/null
+++ b/gas/frags.h
@@ -0,0 +1,158 @@
+/* frags.h - Header file for the frag concept.
+   Copyright (C) 1987, 92, 93, 94, 95, 97, 1998
+   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, 59 Temple Place - Suite 330, Boston, MA
+   02111-1307, 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. */
+  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 {
+    /* 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 );	\
+}
+#else
+extern void frag_append_1_char PARAMS ((int));
+#define FRAG_APPEND_1_CHAR(X) frag_append_1_char (X)
+#endif
+
+
+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 */