initial import of NetBSD tree

1 files changed, 93 insertions, 0 deletions

diff --git a/gnu/usr.bin/gas/subsegs.h b/gnu/usr.bin/gas/subsegs.h
new file mode 100644
index 00000000000..72d5b73be37
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+++ b/gnu/usr.bin/gas/subsegs.h
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+/* subsegs.h -> subsegs.c
+
+   Copyright (C) 1987, 1992 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.  */
+/*
+ * $Id: subsegs.h,v 1.1 1995/10/18 08:39:00 deraadt Exp $
+ */
+
+
+/*
+ * For every sub-segment the user mentions in the ASsembler program,
+ * we make one struct frchain. Each sub-segment has exactly one struct frchain
+ * and vice versa.
+ *
+ * Struct frchain's are forward chained (in ascending order of sub-segment
+ * code number). The chain runs through frch_next of each subsegment.
+ * This makes it hard to find a subsegment's frags
+ * if programmer uses a lot of them. Most programs only use text0 and
+ * data0, so they don't suffer. At least this way:
+ * (1)	There are no "arbitrary" restrictions on how many subsegments
+ *	can be programmed;
+ * (2)	Subsegments' frchain-s are (later) chained together in the order in
+ *	which they are emitted for object file viz text then data.
+ *
+ * From each struct frchain dangles a chain of struct frags. The frags
+ * represent code fragments, for that sub-segment, forward chained.
+ */
+
+struct frchain			/* control building of a frag chain */
+{				/* FRCH = FRagment CHain control */
+	struct frag *	frch_root;	/* 1st struct frag in chain, or NULL */
+	struct frag *	frch_last;	/* last struct frag in chain, or NULL */
+	struct frchain * frch_next;	/* next in chain of struct frchain-s */
+	segT		frch_seg;	/* SEG_TEXT or SEG_DATA. */
+	subsegT	frch_subseg;	/* subsegment number of this chain */
+};
+
+typedef struct frchain frchainS;
+
+extern frchainS * frchain_root;	/* NULL means no frchains yet. */
+/* all subsegments' chains hang off here */
+
+extern frchainS * frchain_now;
+/* Frchain we are assembling into now */
+/* That is, the current segment's frag */
+/* chain, even if it contains no (complete) */
+/* frags. */
+
+
+#ifdef MANY_SEGMENTS
+typedef struct 
+{
+	frchainS *frchainP;
+	int hadone;
+	int user_stuff;
+	/*  struct frag *frag_root;*/
+	/*  struct frag *last_frag;*/
+	fixS *fix_root;
+	fixS *fix_tail;
+	struct internal_scnhdr scnhdr;
+	symbolS *dot;
+	
+	struct lineno_list *lineno_list_head;	
+	struct lineno_list *lineno_list_tail;	
+	
+} segment_info_type;
+segment_info_type segment_info[];
+#else
+extern frchainS * data0_frchainP;
+extern frchainS * bss0_frchainP;
+/* Sentinel for frchain crawling. */
+/* Points to the 1st data-segment frchain. */
+/* (Which is pointed to by the last text- */
+/* segment frchain.) */
+
+#endif
+
+/* end of subsegs.h */