initial import of NetBSD tree

1 files changed, 746 insertions, 0 deletions

diff --git a/gnu/usr.bin/gas/app.c b/gnu/usr.bin/gas/app.c
new file mode 100644
index 00000000000..221ae0a09f2
--- /dev/null
+++ b/gnu/usr.bin/gas/app.c
@@ -0,0 +1,746 @@
+/* This is the Assembler Pre-Processor
+   Copyright (C) 1987, 1990, 1991, 1992, 1994 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.  */
+
+/* Modified by Allen Wirfs-Brock, Instantiations Inc 2/90 */
+/* App, the assembler pre-processor.  This pre-processor strips out excess
+   spaces, turns single-quoted characters into a decimal constant, and turns
+   # <number> <filename> <garbage> into a .line <number>\n.file <filename>
+   pair.  This needs better error-handling.  */
+
+#ifndef lint
+static char rcsid[] = "$Id: app.c,v 1.1 1995/10/18 08:38:57 deraadt Exp $";
+#endif
+
+#include <stdio.h>
+#include "as.h"			/* For BAD_CASE() only */
+
+#if (__STDC__ != 1)
+#ifndef const
+#define const  /* empty */
+#endif
+#endif
+
+static char lex[256];
+static const char symbol_chars[] =
+"$._ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
+
+#define LEX_IS_SYMBOL_COMPONENT		1
+#define LEX_IS_WHITESPACE		2
+#define LEX_IS_LINE_SEPARATOR		3
+#define LEX_IS_COMMENT_START		4
+#define LEX_IS_LINE_COMMENT_START	5
+#define	LEX_IS_TWOCHAR_COMMENT_1ST	6
+#define	LEX_IS_TWOCHAR_COMMENT_2ND	7
+#define	LEX_IS_STRINGQUOTE		8
+#define	LEX_IS_COLON			9
+#define	LEX_IS_NEWLINE			10
+#define	LEX_IS_ONECHAR_QUOTE		11
+#define IS_SYMBOL_COMPONENT(c)		(lex[c] == LEX_IS_SYMBOL_COMPONENT)
+#define IS_WHITESPACE(c)		(lex[c] == LEX_IS_WHITESPACE)
+#define IS_LINE_SEPARATOR(c)		(lex[c] == LEX_IS_LINE_SEPARATOR)
+#define IS_COMMENT(c)			(lex[c] == LEX_IS_COMMENT_START)
+#define IS_LINE_COMMENT(c)		(lex[c] == LEX_IS_LINE_COMMENT_START)
+#define	IS_NEWLINE(c)			(lex[c] == LEX_IS_NEWLINE)
+
+static int process_escape PARAMS ((int));
+
+/* FIXME-soon: The entire lexer/parser thingy should be
+   built statically at compile time rather than dynamically
+   each and every time the assembler is run.  xoxorich. */
+
+void 
+do_scrub_begin ()
+{
+  const char *p;
+
+  lex[' '] = LEX_IS_WHITESPACE;
+  lex['\t'] = LEX_IS_WHITESPACE;
+  lex['\n'] = LEX_IS_NEWLINE;
+  lex[';'] = LEX_IS_LINE_SEPARATOR;
+  lex['"'] = LEX_IS_STRINGQUOTE;
+#ifndef TC_HPPA
+  lex['\''] = LEX_IS_ONECHAR_QUOTE;
+#endif
+  lex[':'] = LEX_IS_COLON;
+
+
+
+#ifdef SINGLE_QUOTE_STRINGS
+  lex['\''] = LEX_IS_STRINGQUOTE;
+#endif
+
+  /* Note that these override the previous defaults, e.g. if ';' is a
+     comment char, then it isn't a line separator.  */
+  for (p = symbol_chars; *p; ++p)
+    {
+      lex[(unsigned char) *p] = LEX_IS_SYMBOL_COMPONENT;
+    }				/* declare symbol characters */
+
+  for (p = comment_chars; *p; p++)
+    {
+      lex[(unsigned char) *p] = LEX_IS_COMMENT_START;
+    }				/* declare comment chars */
+
+  for (p = line_comment_chars; *p; p++)
+    {
+      lex[(unsigned char) *p] = LEX_IS_LINE_COMMENT_START;
+    }				/* declare line comment chars */
+
+  for (p = line_separator_chars; *p; p++)
+    {
+      lex[(unsigned char) *p] = LEX_IS_LINE_SEPARATOR;
+    }				/* declare line separators */
+
+  /* Only allow slash-star comments if slash is not in use */
+  if (lex['/'] == 0)
+    {
+      lex['/'] = LEX_IS_TWOCHAR_COMMENT_1ST;
+    }
+  /* FIXME-soon.  This is a bad hack but otherwise, we can't do
+     c-style comments when '/' is a line comment char. xoxorich. */
+  if (lex['*'] == 0)
+    {
+      lex['*'] = LEX_IS_TWOCHAR_COMMENT_2ND;
+    }
+}				/* do_scrub_begin() */
+
+FILE *scrub_file;
+
+int 
+scrub_from_file ()
+{
+  return getc (scrub_file);
+}
+
+void 
+scrub_to_file (ch)
+     int ch;
+{
+  ungetc (ch, scrub_file);
+}				/* scrub_to_file() */
+
+char *scrub_string;
+char *scrub_last_string;
+
+int 
+scrub_from_string ()
+{
+  return scrub_string == scrub_last_string ? EOF : *scrub_string++;
+}				/* scrub_from_string() */
+
+void 
+scrub_to_string (ch)
+     int ch;
+{
+  *--scrub_string = ch;
+}				/* scrub_to_string() */
+
+/* Saved state of the scrubber */
+static int state;
+static int old_state;
+static char *out_string;
+static char out_buf[20];
+static int add_newlines = 0;
+
+/* Data structure for saving the state of app across #include's.  Note that
+   app is called asynchronously to the parsing of the .include's, so our
+   state at the time .include is interpreted is completely unrelated.
+   That's why we have to save it all.  */
+
+struct app_save
+  {
+    int state;
+    int old_state;
+    char *out_string;
+    char out_buf[sizeof (out_buf)];
+    int add_newlines;
+    char *scrub_string;
+    char *scrub_last_string;
+    FILE *scrub_file;
+  };
+
+char *
+app_push ()
+{
+  register struct app_save *saved;
+
+  saved = (struct app_save *) xmalloc (sizeof (*saved));
+  saved->state = state;
+  saved->old_state = old_state;
+  saved->out_string = out_string;
+  memcpy (saved->out_buf, out_buf, sizeof (out_buf));
+  saved->add_newlines = add_newlines;
+  saved->scrub_string = scrub_string;
+  saved->scrub_last_string = scrub_last_string;
+  saved->scrub_file = scrub_file;
+
+  /* do_scrub_begin() is not useful, just wastes time. */
+  return (char *) saved;
+}
+
+void 
+app_pop (arg)
+     char *arg;
+{
+  register struct app_save *saved = (struct app_save *) arg;
+
+  /* There is no do_scrub_end (). */
+  state = saved->state;
+  old_state = saved->old_state;
+  out_string = saved->out_string;
+  memcpy (out_buf, saved->out_buf, sizeof (out_buf));
+  add_newlines = saved->add_newlines;
+  scrub_string = saved->scrub_string;
+  scrub_last_string = saved->scrub_last_string;
+  scrub_file = saved->scrub_file;
+
+  free (arg);
+}				/* app_pop() */
+
+/* @@ This assumes that \n &c are the same on host and target.  This is not
+   necessarily true.  */
+static int 
+process_escape (ch)
+     int ch;
+{
+  switch (ch)
+    {
+    case 'b':
+      return '\b';
+    case 'f':
+      return '\f';
+    case 'n':
+      return '\n';
+    case 'r':
+      return '\r';
+    case 't':
+      return '\t';
+    case '\'':
+      return '\'';
+    case '"':
+      return '\"';
+    default:
+      return ch;
+    }
+}
+int 
+do_scrub_next_char (get, unget)
+     int (*get) ();
+     void (*unget) ();
+{
+  /*State 0: beginning of normal line
+	  1: After first whitespace on line (flush more white)
+	  2: After first non-white (opcode) on line (keep 1white)
+	  3: after second white on line (into operands) (flush white)
+	  4: after putting out a .line, put out digits
+	  5: parsing a string, then go to old-state
+	  6: putting out \ escape in a "d string.
+	  7: After putting out a .appfile, put out string.
+	  8: After putting out a .appfile string, flush until newline.
+	  9: After seeing symbol char in state 3 (keep 1white after symchar)
+	 10: After seeing whitespace in state 9 (keep white before symchar)
+	 11: After seeing a symbol character in state 0 (eg a label definition)
+	 -1: output string in out_string and go to the state in old_state
+	 -2: flush text until a '*' '/' is seen, then go to state old_state
+	  */
+
+  /* I added states 9 and 10 because the MIPS ECOFF assembler uses
+     constructs like ``.loc 1 20''.  This was turning into ``.loc
+     120''.  States 9 and 10 ensure that a space is never dropped in
+     between characters which could appear in a identifier.  Ian
+     Taylor, ian@cygnus.com.
+
+     I added state 11 so that something like "Lfoo add %r25,%r26,%r27" works
+     correctly on the PA (and any other target where colons are optional).
+     Jeff Law, law@cs.utah.edu.  */
+
+  register int ch, ch2 = 0;
+  int not_cpp_line = 0;
+
+  switch (state)
+    {
+    case -1:
+      ch = *out_string++;
+      if (*out_string == 0)
+	{
+	  state = old_state;
+	  old_state = 3;
+	}
+      return ch;
+
+    case -2:
+      for (;;)
+	{
+	  do
+	    {
+	      ch = (*get) ();
+	    }
+	  while (ch != EOF && ch != '\n' && ch != '*');
+	  if (ch == '\n' || ch == EOF)
+	    return ch;
+
+	  /* At this point, ch must be a '*' */
+	  while ((ch = (*get) ()) == '*')
+	    {
+	      ;
+	    }
+	  if (ch == EOF || ch == '/')
+	    break;
+	  (*unget) (ch);
+	}
+      state = old_state;
+      return ' ';
+
+    case 4:
+      ch = (*get) ();
+      if (ch == EOF || (ch >= '0' && ch <= '9'))
+	return ch;
+      else
+	{
+	  while (ch != EOF && IS_WHITESPACE (ch))
+	    ch = (*get) ();
+	  if (ch == '"')
+	    {
+	      (*unget) (ch);
+	      out_string = "\n\t.appfile ";
+	      old_state = 7;
+	      state = -1;
+	      return *out_string++;
+	    }
+	  else
+	    {
+	      while (ch != EOF && ch != '\n')
+		ch = (*get) ();
+	      state = 0;
+	      return ch;
+	    }
+	}
+
+    case 5:
+      ch = (*get) ();
+      if (lex[ch] == LEX_IS_STRINGQUOTE)
+	{
+	  state = old_state;
+	  return ch;
+	}
+#ifndef NO_STRING_ESCAPES
+      else if (ch == '\\')
+	{
+	  state = 6;
+	  return ch;
+	}
+#endif
+      else if (ch == EOF)
+	{
+	  as_warn ("End of file in string: inserted '\"'");
+	  state = old_state;
+	  (*unget) ('\n');
+	  return '"';
+	}
+      else
+	{
+	  return ch;
+	}
+
+    case 6:
+      state = 5;
+      ch = (*get) ();
+      switch (ch)
+	{
+	  /* Handle strings broken across lines, by turning '\n' into
+	     '\\' and 'n'.  */
+	case '\n':
+	  (*unget) ('n');
+	  add_newlines++;
+	  return '\\';
+
+	case '"':
+	case '\\':
+	case 'b':
+	case 'f':
+	case 'n':
+	case 'r':
+	case 't':
+#ifdef BACKSLASH_V
+	case 'v':
+#endif /* BACKSLASH_V */
+	case 'x':
+	case 'X':
+	case '0':
+	case '1':
+	case '2':
+	case '3':
+	case '4':
+	case '5':
+	case '6':
+	case '7':
+	  break;
+#if defined(IGNORE_NONSTANDARD_ESCAPES) | defined(ONLY_STANDARD_ESCAPES)
+	default:
+	  as_warn ("Unknown escape '\\%c' in string: Ignored", ch);
+	  break;
+#else /* ONLY_STANDARD_ESCAPES */
+	default:
+	  /* Accept \x as x for any x */
+	  break;
+#endif /* ONLY_STANDARD_ESCAPES */
+
+	case EOF:
+	  as_warn ("End of file in string: '\"' inserted");
+	  return '"';
+	}
+      return ch;
+
+    case 7:
+      ch = (*get) ();
+      state = 5;
+      old_state = 8;
+      return ch;
+
+    case 8:
+      do
+	ch = (*get) ();
+      while (ch != '\n');
+      state = 0;
+      return ch;
+    }
+
+  /* OK, we are somewhere in states 0 through 4 or 9 through 11 */
+
+  /* flushchar: */
+  ch = (*get) ();
+recycle:
+  if (ch == EOF)
+    {
+      if (state != 0)
+	as_warn ("End of file not at end of a line: Newline inserted.");
+      return ch;
+    }
+
+  switch (lex[ch])
+    {
+    case LEX_IS_WHITESPACE:
+      do
+	/* Preserve a single whitespace character at the beginning of
+	   a line.  */
+	if (state == 0)
+	  {
+	    state = 1;
+	    return ch;
+	  }
+	else
+	  ch = (*get) ();
+      while (ch != EOF && IS_WHITESPACE (ch));
+      if (ch == EOF)
+	return ch;
+
+      if (IS_COMMENT (ch)
+	  || (state == 0 && IS_LINE_COMMENT (ch))
+	  || ch == '/'
+	  || IS_LINE_SEPARATOR (ch))
+	{
+	  /* cpp never outputs a leading space before the #, so try to
+	     avoid being confused.  */
+	  not_cpp_line = 1;
+	  goto recycle;
+	}
+#ifdef MRI
+      (*unget) (ch);		/* Put back */
+      return ' ';		/* Always return one space at start of line */
+#endif
+
+      /* If we're in state 2 or 11, we've seen a non-white character
+	 followed by whitespace.  If the next character is ':', this
+	 is whitespace after a label name which we *must* ignore.  */
+      if ((state == 2 || state == 11) && lex[ch] == LEX_IS_COLON)
+	{
+	  state = 1;
+	  return ch;
+	}
+
+      switch (state)
+	{
+	case 0:
+	  state++;
+	  goto recycle;		/* Punted leading sp */
+	case 1:
+	  /* We can arrive here if we leave a leading whitespace character
+	     at the beginning of a line.  */
+	  goto recycle;
+	case 2:
+	  state = 3;
+	  (*unget) (ch);
+	  return ' ';		/* Sp after opco */
+	case 3:
+	  goto recycle;		/* Sp in operands */
+	case 9:
+	case 10:
+	  state = 10;		/* Sp after symbol char */
+	  goto recycle;
+	case 11:
+	  state = 1;
+	  (*unget) (ch);
+	  return ' ';		/* Sp after label definition.  */
+	default:
+	  BAD_CASE (state);
+	}
+      break;
+
+    case LEX_IS_TWOCHAR_COMMENT_1ST:
+      ch2 = (*get) ();
+      if (ch2 != EOF && lex[ch2] == LEX_IS_TWOCHAR_COMMENT_2ND)
+	{
+	  for (;;)
+	    {
+	      do
+		{
+		  ch2 = (*get) ();
+		  if (ch2 != EOF && IS_NEWLINE (ch2))
+		    add_newlines++;
+		}
+	      while (ch2 != EOF &&
+		     (lex[ch2] != LEX_IS_TWOCHAR_COMMENT_2ND));
+
+	      while (ch2 != EOF &&
+		     (lex[ch2] == LEX_IS_TWOCHAR_COMMENT_2ND))
+		{
+		  ch2 = (*get) ();
+		}
+
+	      if (ch2 == EOF
+		  || lex[ch2] == LEX_IS_TWOCHAR_COMMENT_1ST)
+		break;
+	      (*unget) (ch);
+	    }
+	  if (ch2 == EOF)
+	    as_warn ("End of file in multiline comment");
+
+	  ch = ' ';
+	  goto recycle;
+	}
+      else
+	{
+	  if (ch2 != EOF)
+	    (*unget) (ch2);
+	  if (state == 9 || state == 10)
+	    state = 3;
+	  return ch;
+	}
+      break;
+
+    case LEX_IS_STRINGQUOTE:
+      if (state == 9 || state == 10)
+	old_state = 3;
+      else
+	old_state = state;
+      state = 5;
+      return ch;
+#ifndef MRI
+#ifndef IEEE_STYLE
+    case LEX_IS_ONECHAR_QUOTE:
+      ch = (*get) ();
+      if (ch == EOF)
+	{
+	  as_warn ("End-of-file after a one-character quote; \\000 inserted");
+	  ch = 0;
+	}
+      if (ch == '\\')
+	{
+	  ch = (*get) ();
+	  ch = process_escape (ch);
+	}
+      sprintf (out_buf, "%d", (int) (unsigned char) ch);
+
+
+      /* None of these 'x constants for us.  We want 'x'.  */
+      if ((ch = (*get) ()) != '\'')
+	{
+#ifdef REQUIRE_CHAR_CLOSE_QUOTE
+	  as_warn ("Missing close quote: (assumed)");
+#else
+	  (*unget) (ch);
+#endif
+	}
+      if (strlen (out_buf) == 1)
+	{
+	  return out_buf[0];
+	}
+      if (state == 9 || state == 10)
+	old_state = 3;
+      else
+	old_state = state;
+      state = -1;
+      out_string = out_buf;
+      return *out_string++;
+#endif
+#endif
+    case LEX_IS_COLON:
+      if (state == 9 || state == 10)
+	state = 3;
+      else if (state != 3)
+	state = 1;
+      return ch;
+
+    case LEX_IS_NEWLINE:
+      /* Roll out a bunch of newlines from inside comments, etc.  */
+      if (add_newlines)
+	{
+	  --add_newlines;
+	  (*unget) (ch);
+	}
+      /* fall thru into... */
+
+    case LEX_IS_LINE_SEPARATOR:
+      state = 0;
+      return ch;
+
+    case LEX_IS_LINE_COMMENT_START:
+      if (state == 0)		/* Only comment at start of line.  */
+	{
+	  /* FIXME-someday: The two character comment stuff was badly
+	     thought out.  On i386, we want '/' as line comment start
+	     AND we want C style comments.  hence this hack.  The
+	     whole lexical process should be reworked.  xoxorich.  */
+	  if (ch == '/')
+	    {
+	      ch2 = (*get) ();
+	      if (ch2 == '*')
+		{
+		  state = -2;
+		  return (do_scrub_next_char (get, unget));
+		}
+	      else
+		{
+		  (*unget) (ch2);
+		}
+	    }			/* bad hack */
+
+	  if (ch != '#')
+	    not_cpp_line = 1;
+
+	  do
+	    ch = (*get) ();
+	  while (ch != EOF && IS_WHITESPACE (ch));
+	  if (ch == EOF)
+	    {
+	      as_warn ("EOF in comment:  Newline inserted");
+	      return '\n';
+	    }
+	  if (ch < '0' || ch > '9' || not_cpp_line)
+	    {
+	      /* Non-numerics:  Eat whole comment line */
+	      while (ch != EOF && !IS_NEWLINE (ch))
+		ch = (*get) ();
+	      if (ch == EOF)
+		as_warn ("EOF in Comment: Newline inserted");
+	      state = 0;
+	      return '\n';
+	    }
+	  /* Numerics begin comment.  Perhaps CPP `# 123 "filename"' */
+	  (*unget) (ch);
+	  old_state = 4;
+	  state = -1;
+	  out_string = "\t.appline ";
+	  return *out_string++;
+	}
+
+      /* We have a line comment character which is not at the start of
+	 a line.  If this is also a normal comment character, fall
+	 through.  Otherwise treat it as a default character.  */
+      if (strchr (comment_chars, ch) == NULL)
+	goto de_fault;
+      /* Fall through.  */
+    case LEX_IS_COMMENT_START:
+      do
+	ch = (*get) ();
+      while (ch != EOF && !IS_NEWLINE (ch));
+      if (ch == EOF)
+	as_warn ("EOF in comment:  Newline inserted");
+      state = 0;
+      return '\n';
+
+    case LEX_IS_SYMBOL_COMPONENT:
+      if (state == 10)
+	{
+	  /* This is a symbol character following another symbol
+	     character, with whitespace in between.  We skipped the
+	     whitespace earlier, so output it now.  */
+	  (*unget) (ch);
+	  state = 3;
+	  return ' ';
+	}
+      if (state == 3)
+	state = 9;
+      /* Fall through.  */
+    default:
+    de_fault:
+      /* Some relatively `normal' character.  */
+      if (state == 0)
+	{
+	  state = 11;		/* Now seeing label definition */
+	  return ch;
+	}
+      else if (state == 1)
+	{
+	  state = 2;		/* Ditto */
+	  return ch;
+	}
+      else if (state == 9)
+	{
+	  if (lex[ch] != LEX_IS_SYMBOL_COMPONENT)
+	    state = 3;
+	  return ch;
+	}
+      else if (state == 10)
+	{
+	  state = 3;
+	  return ch;
+	}
+      else
+	{
+	  return ch;		/* Opcode or operands already */
+	}
+    }
+  return -1;
+}
+
+#ifdef TEST
+
+const char comment_chars[] = "|";
+const char line_comment_chars[] = "#";
+
+main ()
+{
+  int ch;
+
+  app_begin ();
+  while ((ch = do_scrub_next_char (stdin)) != EOF)
+    putc (ch, stdout);
+}
+
+as_warn (str)
+     char *str;
+{
+  fputs (str, stderr);
+  putc ('\n', stderr);
+}
+
+#endif
+
+/* end of app.c */