Initial Fortran language support, adapted from work by Farooq Butt

	(fmbutt@engage.sps.mot.com).
	* Makefile.in: Add Fortran-related files and dependencies.
	* defs.h (language_fortran): New language enum.
	* language.h (_LANG_fortran): Define.
	(MAX_FORTRAN_DIMS): Define.
	* expression.h: Reformat to standard.
	(MULTI_F77_SUBSCRIPT, OP_F77_UNDETERMINED_ARGLIST,
	OP_F77_LITERAL_COMPLEX, OP_F77_SUBSTR): New expression opcodes.
	* gdbtypes.h (TYPE_CODE_COMPLEX, TYPE_CODE_LITERAL_COMPLEX,
	TYPE_CODE_LITERAL_STRING): New type codes.
	(type): New fields upper_bound_type and lower_bound_type.
	(TYPE_ARRAY_UPPER_BOUND_TYPE, TYPE_ARRAY_LOWER_BOUND_TYPE,
	TYPE_ARRAY_UPPER_BOUND_VALUE, TYPE_ARRAY_LOWER_BOUND_VALUE): New
	macros.
	(builtin_type_f_character, etc): Declare.
	* value.h (VALUE_LITERAL_DATA, VALUE_SUBSTRING_START): Define.
	* f-exp.y: New file, Fortran expression grammar.
	* f-lang.c: New file, Fortran language support functions.
	* f-lang.h: New file, Fortran language support declarations.
	* f-typeprint.c: New file, Fortran type printing.
	* f-valprint.c: New file, Fortran value printing.
	* eval.c (evaluate_subexp): Add code for new expression opcodes,
	fix wording of error message.
	* gdbtypes.c (f77_create_literal_complex_type,
	f77_create_literal_string_type): New functions.
	* language.c (set_language_command): Add Fortran info.
	(calc_f77_array_dims): New function.
	* parse.c (length_of_subexp, prefixify_subexp): Add cases for new
	expression opcodes.
	* symfile.c (deduce_language_from_filename): Recognize .f and .F
	as Fortran source files.
	* valops.c (f77_value_literal_string, f77_value_substring,
	f77_value_literal_complex): New functions.

1 files changed, 945 insertions, 0 deletions

diff --git a/gdb/f-lang.c b/gdb/f-lang.c
new file mode 100644
index 0000000..f9d55b7
--- /dev/null
+++ b/gdb/f-lang.c
@@ -0,0 +1,945 @@
+/* Fortran language support routines for GDB, the GNU debugger.
+   Copyright 1993, 1994 Free Software Foundation, Inc.
+   Contributed by Motorola.  Adapted from the C parser by Farooq Butt
+   (fmbutt@engage.sps.mot.com).
+
+This file is part of GDB.
+
+This program 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 of the License, or
+(at your option) any later version.
+
+This program 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 this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include "defs.h"
+#include "symtab.h"
+#include "gdbtypes.h"
+#include "expression.h"
+#include "parser-defs.h"
+#include "language.h"
+#include "f-lang.h"
+
+/* Print the character C on STREAM as part of the contents of a literal
+   string whose delimiter is QUOTER.  Note that that format for printing
+   characters and strings is language specific.
+   FIXME:  This is a copy of the same function from c-exp.y.  It should
+   be replaced with a true F77 version.  */
+
+static void
+emit_char (c, stream, quoter)
+     register int c;
+     FILE *stream;
+     int quoter;
+{
+  c &= 0xFF;			/* Avoid sign bit follies */
+  
+  if (PRINT_LITERAL_FORM (c))
+    {
+      if (c == '\\' || c == quoter)
+	fputs_filtered ("\\", stream);
+      fprintf_filtered (stream, "%c", c);
+    }
+  else
+    {
+      switch (c)
+	{
+	case '\n':
+	  fputs_filtered ("\\n", stream);
+	  break;
+	case '\b':
+	  fputs_filtered ("\\b", stream);
+	  break;
+	case '\t':
+	  fputs_filtered ("\\t", stream);
+	  break;
+	case '\f':
+	  fputs_filtered ("\\f", stream);
+	  break;
+	case '\r':
+	  fputs_filtered ("\\r", stream);
+	  break;
+	case '\033':
+	  fputs_filtered ("\\e", stream);
+	  break;
+	case '\007':
+	  fputs_filtered ("\\a", stream);
+	  break;
+	default:
+	  fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
+	  break;
+	}
+    }
+}
+
+/* FIXME:  This is a copy of the same function from c-exp.y.  It should
+   be replaced with a true F77version. */
+
+static void
+f_printchar (c, stream)
+     int c;
+     FILE *stream;
+{
+  fputs_filtered ("'", stream);
+  emit_char (c, stream, '\'');
+  fputs_filtered ("'", stream);
+}
+
+/* Print the character string STRING, printing at most LENGTH characters.
+   Printing stops early if the number hits print_max; repeat counts
+   are printed as appropriate.  Print ellipses at the end if we
+   had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.
+   FIXME:  This is a copy of the same function from c-exp.y.  It should
+   be replaced with a true F77 version. */
+
+static void
+f_printstr (stream, string, length, force_ellipses)
+     FILE *stream;
+     char *string;
+     unsigned int length;
+     int force_ellipses;
+{
+  register unsigned int i;
+  unsigned int things_printed = 0;
+  int in_quotes = 0;
+  int need_comma = 0;
+  extern int inspect_it;
+  extern int repeat_count_threshold;
+  extern int print_max;
+  
+  if (length == 0)
+    {
+      fputs_filtered ("''", stdout);
+      return;
+    }
+  
+  for (i = 0; i < length && things_printed < print_max; ++i)
+    {
+      /* Position of the character we are examining
+	 to see whether it is repeated.  */
+      unsigned int rep1;
+      /* Number of repetitions we have detected so far.  */
+      unsigned int reps;
+      
+      QUIT;
+      
+      if (need_comma)
+	{
+	  fputs_filtered (", ", stream);
+	  need_comma = 0;
+	}
+      
+      rep1 = i + 1;
+      reps = 1;
+      while (rep1 < length && string[rep1] == string[i])
+	{
+	  ++rep1;
+	  ++reps;
+	}
+      
+      if (reps > repeat_count_threshold)
+	{
+	  if (in_quotes)
+	    {
+	      if (inspect_it)
+		fputs_filtered ("\\', ", stream);
+	      else
+		fputs_filtered ("', ", stream);
+	      in_quotes = 0;
+	    }
+	  f_printchar (string[i], stream);
+	  fprintf_filtered (stream, " <repeats %u times>", reps);
+	  i = rep1 - 1;
+	  things_printed += repeat_count_threshold;
+	  need_comma = 1;
+	}
+      else
+	{
+	  if (!in_quotes)
+	    {
+	      if (inspect_it)
+		fputs_filtered ("\\'", stream);
+	      else
+		fputs_filtered ("'", stream);
+	      in_quotes = 1;
+	    }
+	  emit_char (string[i], stream, '"');
+	  ++things_printed;
+	}
+    }
+  
+  /* Terminate the quotes if necessary.  */
+  if (in_quotes)
+    {
+      if (inspect_it)
+	fputs_filtered ("\\'", stream);
+      else
+	fputs_filtered ("'", stream);
+    }
+  
+  if (force_ellipses || i < length)
+    fputs_filtered ("...", stream);
+}
+
+/* FIXME:  This is a copy of c_create_fundamental_type(), before
+   all the non-C types were stripped from it.  Needs to be fixed
+   by an experienced F77 programmer. */
+
+static struct type *
+f_create_fundamental_type (objfile, typeid)
+     struct objfile *objfile;
+     int typeid;
+{
+  register struct type *type = NULL;
+  
+  switch (typeid)
+    {
+    case FT_VOID:
+      type = init_type (TYPE_CODE_VOID,
+			TARGET_CHAR_BIT / TARGET_CHAR_BIT,
+			0, "VOID", objfile);
+      break;
+    case FT_BOOLEAN:
+      type = init_type (TYPE_CODE_BOOL,
+			TARGET_CHAR_BIT / TARGET_CHAR_BIT,
+			TYPE_FLAG_UNSIGNED, "boolean", objfile);
+      break;
+    case FT_STRING:
+      type = init_type (TYPE_CODE_STRING,
+			TARGET_CHAR_BIT / TARGET_CHAR_BIT,
+			0, "string", objfile);
+      break;
+    case FT_CHAR:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_CHAR_BIT / TARGET_CHAR_BIT,
+			0, "character", objfile);
+      break;
+    case FT_SIGNED_CHAR:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_CHAR_BIT / TARGET_CHAR_BIT,
+			0, "integer*1", objfile);
+      break;
+    case FT_UNSIGNED_CHAR:
+      type = init_type (TYPE_CODE_BOOL,
+			TARGET_CHAR_BIT / TARGET_CHAR_BIT,
+			TYPE_FLAG_UNSIGNED, "logical*1", objfile);
+      break;
+    case FT_SHORT:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_SHORT_BIT / TARGET_CHAR_BIT,
+			0, "integer*2", objfile);
+      break;
+    case FT_SIGNED_SHORT:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_SHORT_BIT / TARGET_CHAR_BIT,
+			0, "short", objfile);	/* FIXME-fnf */
+      break;
+    case FT_UNSIGNED_SHORT:
+      type = init_type (TYPE_CODE_BOOL,
+			TARGET_SHORT_BIT / TARGET_CHAR_BIT,
+			TYPE_FLAG_UNSIGNED, "logical*2", objfile);
+      break;
+    case FT_INTEGER:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_INT_BIT / TARGET_CHAR_BIT,
+			0, "integer*4", objfile);
+      break;
+    case FT_SIGNED_INTEGER:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_INT_BIT / TARGET_CHAR_BIT,
+			0, "integer", objfile); /* FIXME -fnf */
+      break;
+    case FT_UNSIGNED_INTEGER:
+      type = init_type (TYPE_CODE_BOOL, 
+			TARGET_INT_BIT / TARGET_CHAR_BIT,
+			TYPE_FLAG_UNSIGNED, "logical*4", objfile);
+      break;
+    case FT_FIXED_DECIMAL:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_INT_BIT / TARGET_CHAR_BIT,
+			0, "fixed decimal", objfile);
+      break;
+    case FT_LONG:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_LONG_BIT / TARGET_CHAR_BIT,
+			0, "long", objfile);
+      break;
+    case FT_SIGNED_LONG:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_LONG_BIT / TARGET_CHAR_BIT,
+			0, "long", objfile); /* FIXME -fnf */
+      break;
+    case FT_UNSIGNED_LONG:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_LONG_BIT / TARGET_CHAR_BIT,
+			TYPE_FLAG_UNSIGNED, "unsigned long", objfile);
+      break;
+    case FT_LONG_LONG:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
+			0, "long long", objfile);
+      break;
+    case FT_SIGNED_LONG_LONG:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
+			0, "signed long long", objfile);
+      break;
+    case FT_UNSIGNED_LONG_LONG:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
+			TYPE_FLAG_UNSIGNED, "unsigned long long", objfile);
+      break;
+    case FT_FLOAT:
+      type = init_type (TYPE_CODE_FLT,
+			TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
+			0, "real", objfile);
+      break;
+    case FT_DBL_PREC_FLOAT:
+      type = init_type (TYPE_CODE_FLT,
+			TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
+			0, "real*8", objfile);
+      break;
+    case FT_FLOAT_DECIMAL:
+      type = init_type (TYPE_CODE_FLT,
+			TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
+			0, "floating decimal", objfile);
+      break;
+    case FT_EXT_PREC_FLOAT:
+      type = init_type (TYPE_CODE_FLT,
+			TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
+			0, "real*16", objfile);
+      break;
+    case FT_COMPLEX:
+      type = init_type (TYPE_CODE_FLT,
+			TARGET_COMPLEX_BIT / TARGET_CHAR_BIT,
+			0, "complex*8", objfile);
+      break;
+    case FT_DBL_PREC_COMPLEX:
+      type = init_type (TYPE_CODE_FLT,
+			TARGET_DOUBLE_COMPLEX_BIT / TARGET_CHAR_BIT,
+			0, "complex*16", objfile);
+      break;
+    case FT_EXT_PREC_COMPLEX:
+      type = init_type (TYPE_CODE_FLT,
+			TARGET_DOUBLE_COMPLEX_BIT / TARGET_CHAR_BIT,
+			0, "complex*32", objfile);
+      break;
+    default:
+      /* FIXME:  For now, if we are asked to produce a type not in this
+	 language, create the equivalent of a C integer type with the
+	 name "<?type?>".  When all the dust settles from the type
+	 reconstruction work, this should probably become an error. */
+      type = init_type (TYPE_CODE_INT,
+			TARGET_INT_BIT / TARGET_CHAR_BIT,
+			0, "<?type?>", objfile);
+      warning ("internal error: no F77 fundamental type %d", typeid);
+      break;
+    }
+  return (type);
+}
+
+
+/* Table of operators and their precedences for printing expressions.  */
+
+static const struct op_print f_op_print_tab[] = {
+  { "+",     BINOP_ADD, PREC_ADD, 0 },
+  { "+",     UNOP_PLUS, PREC_PREFIX, 0 },
+  { "-",     BINOP_SUB, PREC_ADD, 0 },
+  { "-",     UNOP_NEG, PREC_PREFIX, 0 },
+  { "*",     BINOP_MUL, PREC_MUL, 0 },
+  { "/",     BINOP_DIV, PREC_MUL, 0 },
+  { "DIV",   BINOP_INTDIV, PREC_MUL, 0 },
+  { "MOD",   BINOP_REM, PREC_MUL, 0 },
+  { "=",     BINOP_ASSIGN, PREC_ASSIGN, 1 },
+  { ".OR.",  BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0 },
+  { ".AND.", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0 },
+  { ".NOT.", UNOP_LOGICAL_NOT, PREC_PREFIX, 0 },
+  { ".EQ.",  BINOP_EQUAL, PREC_EQUAL, 0 },
+  { ".NE.",  BINOP_NOTEQUAL, PREC_EQUAL, 0 },
+  { ".LE.",  BINOP_LEQ, PREC_ORDER, 0 },
+  { ".GE.",  BINOP_GEQ, PREC_ORDER, 0 },
+  { ".GT.",  BINOP_GTR, PREC_ORDER, 0 },
+  { ".LT.",  BINOP_LESS, PREC_ORDER, 0 },
+  { "**",    UNOP_IND, PREC_PREFIX, 0 },
+  { "@",     BINOP_REPEAT, PREC_REPEAT, 0 },
+  { NULL,    0, 0, 0 }
+};
+
+/* The built-in types of F77.  */
+
+struct type *builtin_type_f_character;
+struct type *builtin_type_f_integer;
+struct type *builtin_type_f_logical;
+struct type *builtin_type_f_logical_s1;
+struct type *builtin_type_f_logical_s2;
+struct type *builtin_type_f_integer; 
+struct type *builtin_type_f_integer_s2;
+struct type *builtin_type_f_real;
+struct type *builtin_type_f_real_s8;
+struct type *builtin_type_f_real_s16;
+struct type *builtin_type_f_complex_s8;
+struct type *builtin_type_f_complex_s16;
+struct type *builtin_type_f_complex_s32;
+struct type *builtin_type_f_void;
+
+struct type ** const (f_builtin_types[]) = 
+{
+  &builtin_type_f_character,
+  &builtin_type_f_integer,
+  &builtin_type_f_logical,
+  &builtin_type_f_logical_s1,
+  &builtin_type_f_logical_s2,
+  &builtin_type_f_integer,
+  &builtin_type_f_integer_s2,
+  &builtin_type_f_real,
+  &builtin_type_f_real_s8,
+  &builtin_type_f_real_s16,
+  &builtin_type_f_complex_s8,
+  &builtin_type_f_complex_s16,
+#if 0
+  &builtin_type_f_complex_s32,
+#endif
+  &builtin_type_f_void,
+  0
+};
+
+int c_value_print();
+
+const struct language_defn f_language_defn = {
+  "fortran",
+  language_fortran,
+  f_builtin_types,
+  range_check_on,
+  type_check_on,
+  f_parse,			/* parser */
+  f_error,			/* parser error function */
+  f_printchar,			/* Print character constant */
+  f_printstr,			/* function to print string constant */
+  f_create_fundamental_type,	/* Create fundamental type in this language */
+  f_print_type,		        /* Print a type using appropriate syntax */
+  f_val_print,			/* Print a value using appropriate syntax */
+  c_value_print,  /* FIXME */
+  {"",      "",   "",   ""},	/* Binary format info */
+  {"0%o",  "0",   "o", ""},	/* Octal format info */
+  {"%d",   "",    "d", ""},	/* Decimal format info */
+  {"0x%x", "0x",  "x", ""},	/* Hex format info */
+  f_op_print_tab,		/* expression operators for printing */
+  LANG_MAGIC
+  };
+
+void
+_initialize_f_language ()
+{
+  builtin_type_f_void =
+    init_type (TYPE_CODE_VOID, 1,
+	       0,
+	       "VOID", (struct objfile *) NULL);
+  
+  builtin_type_f_character =
+    init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
+	       0,
+	       "character", (struct objfile *) NULL);
+  
+  builtin_type_f_logical_s1 =
+    init_type (TYPE_CODE_BOOL, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
+	       TYPE_FLAG_UNSIGNED,
+	       "logical*1", (struct objfile *) NULL);
+  
+  builtin_type_f_integer_s2 =
+    init_type (TYPE_CODE_INT, TARGET_SHORT_BIT / TARGET_CHAR_BIT,
+	       0,
+	       "integer*2", (struct objfile *) NULL);
+  
+  builtin_type_f_logical_s2 =
+    init_type (TYPE_CODE_BOOL, TARGET_SHORT_BIT / TARGET_CHAR_BIT,
+	       TYPE_FLAG_UNSIGNED,
+	       "logical*2", (struct objfile *) NULL);
+  
+  builtin_type_f_integer =
+    init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
+	       0,
+	       "integer", (struct objfile *) NULL);
+  
+  builtin_type_f_logical =
+    init_type (TYPE_CODE_BOOL, TARGET_INT_BIT / TARGET_CHAR_BIT,
+	       TYPE_FLAG_UNSIGNED,
+	       "logical*4", (struct objfile *) NULL);
+  
+  builtin_type_f_real =
+    init_type (TYPE_CODE_FLT, TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
+	       0,
+	       "real", (struct objfile *) NULL);
+  
+  builtin_type_f_real_s8 =
+    init_type (TYPE_CODE_FLT, TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
+	       0,
+	       "real*8", (struct objfile *) NULL);
+  
+  builtin_type_f_real_s16 =
+    init_type (TYPE_CODE_FLT, TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
+	       0,
+	       "real*16", (struct objfile *) NULL);
+  
+  builtin_type_f_complex_s8 =
+    init_type (TYPE_CODE_COMPLEX, TARGET_COMPLEX_BIT / TARGET_CHAR_BIT,
+	       0,
+	       "complex*8", (struct objfile *) NULL);
+  
+  builtin_type_f_complex_s16 =
+    init_type (TYPE_CODE_COMPLEX, TARGET_DOUBLE_COMPLEX_BIT / TARGET_CHAR_BIT,
+	       0,
+	       "complex*16", (struct objfile *) NULL);
+  
+#if 0
+  /* We have a new size == 4 double floats for the
+     complex*32 data type */
+  
+  builtin_type_f_complex_s32 = 
+    init_type (TYPE_CODE_COMPLEX, TARGET_EXT_COMPLEX_BIT / TARGET_CHAR_BIT,
+	       0,
+	       "complex*32", (struct objfile *) NULL);
+#endif
+  builtin_type_string =
+    init_type (TYPE_CODE_STRING, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
+	       0,
+	       "character string", (struct objfile *) NULL); 
+  
+  add_language (&f_language_defn);
+}
+
+/* Following is dubious stuff that had been in the xcoff reader. */
+
+struct saved_fcn
+{
+  long                         line_offset;  /* Line offset for function */ 
+  struct saved_fcn             *next;      
+}; 
+
+
+struct saved_bf_symnum 
+{
+  long       symnum_fcn;  /* Symnum of function (i.e. .function directive) */
+  long       symnum_bf;   /* Symnum of .bf for this function */ 
+  struct saved_bf_symnum *next;  
+}; 
+
+typedef struct saved_fcn           SAVED_FUNCTION, *SAVED_FUNCTION_PTR; 
+typedef struct saved_bf_symnum     SAVED_BF, *SAVED_BF_PTR; 
+
+
+SAVED_BF_PTR allocate_saved_bf_node()
+{
+  SAVED_BF_PTR new;
+  
+  new = (SAVED_BF_PTR) malloc (sizeof (SAVED_BF));
+  
+  if (new == NULL)
+    fatal("could not allocate enough memory to save one more .bf on save list");
+  return(new);
+}
+
+SAVED_FUNCTION *allocate_saved_function_node()
+{
+  SAVED_FUNCTION *new;
+  
+  new = (SAVED_FUNCTION *) malloc (sizeof (SAVED_FUNCTION));
+  
+  if (new == NULL)
+    fatal("could not allocate enough memory to save one more function on save list");
+  
+  return(new);
+}
+
+SAVED_F77_COMMON_PTR allocate_saved_f77_common_node()
+{
+  SAVED_F77_COMMON_PTR new;
+  
+  new = (SAVED_F77_COMMON_PTR) malloc (sizeof (SAVED_F77_COMMON));
+  
+  if (new == NULL)
+    fatal("could not allocate enough memory to save one more F77 COMMON blk on save list");
+  
+  return(new);
+}
+
+COMMON_ENTRY_PTR allocate_common_entry_node()
+{
+  COMMON_ENTRY_PTR new;
+  
+  new = (COMMON_ENTRY_PTR) malloc (sizeof (COMMON_ENTRY));
+  
+  if (new == NULL)
+    fatal("could not allocate enough memory to save one more COMMON entry on save list");
+  
+  return(new);
+}
+
+
+SAVED_F77_COMMON_PTR head_common_list=NULL;     /* Ptr to 1st saved COMMON  */
+SAVED_F77_COMMON_PTR tail_common_list=NULL;     /* Ptr to last saved COMMON  */
+SAVED_F77_COMMON_PTR current_common=NULL;       /* Ptr to current COMMON */
+
+static SAVED_BF_PTR saved_bf_list=NULL;          /* Ptr to (.bf,function) 
+                                                    list*/
+static SAVED_BF_PTR saved_bf_list_end=NULL;      /* Ptr to above list's end */
+static SAVED_BF_PTR current_head_bf_list=NULL;   /* Current head of above list
+						  */
+
+static SAVED_BF_PTR tmp_bf_ptr;                  /* Generic temporary for use 
+                                                    in macros */ 
+
+
+/* The following function simply enters a given common block onto 
+   the global common block chain */
+
+void add_common_block(name,offset,secnum,func_stab)
+     char *name;
+     CORE_ADDR offset;
+     int secnum;
+     char *func_stab;
+     
+{
+  SAVED_F77_COMMON_PTR tmp;
+  char *c,*local_copy_func_stab; 
+  
+  /* If the COMMON block we are trying to add has a blank 
+     name (i.e. "#BLNK_COM") then we set it to __BLANK
+     because the darn "#" character makes GDB's input 
+     parser have fits. */ 
+  
+  
+  if (STREQ(name,BLANK_COMMON_NAME_ORIGINAL) ||
+      STREQ(name,BLANK_COMMON_NAME_MF77))
+    {
+      
+      free(name);
+      name = alloca(strlen(BLANK_COMMON_NAME_LOCAL) + 1); 
+      strcpy(name,BLANK_COMMON_NAME_LOCAL); 
+    }
+  
+  tmp = allocate_saved_f77_common_node();
+  
+  local_copy_func_stab = malloc (strlen(func_stab) + 1);
+  strcpy(local_copy_func_stab,func_stab); 
+  
+  tmp->name = malloc(strlen(name) + 1);
+  
+  /* local_copy_func_stab is a stabstring, let us first extract the 
+     function name from the stab by NULLing out the ':' character. */ 
+  
+  
+  c = NULL; 
+  c = strchr(local_copy_func_stab,':');
+  
+  if (c)
+    *c = '\0';
+  else
+    error("Malformed function STAB found in add_common_block()");
+  
+  
+  tmp->owning_function = malloc (strlen(local_copy_func_stab) + 1); 
+  
+  strcpy(tmp->owning_function,local_copy_func_stab); 
+  
+  strcpy(tmp->name,name);
+  tmp->offset = offset; 
+  tmp->next = NULL;
+  tmp->entries = NULL;
+  tmp->secnum = secnum; 
+  
+  current_common = tmp;
+  
+  if (head_common_list == NULL)
+    {
+      head_common_list = tail_common_list = tmp;
+    }
+  else
+    {
+      tail_common_list->next = tmp; 
+      tail_common_list = tmp;
+    }
+  
+}
+
+
+/* The following function simply enters a given common entry onto 
+   the "current_common" block that has been saved away. */ 
+
+void add_common_entry(entry_sym_ptr)
+     struct symbol *entry_sym_ptr; 
+{
+  COMMON_ENTRY_PTR tmp;
+  
+  
+  
+  /* The order of this list is important, since 
+     we expect the entries to appear in decl.
+     order when we later issue "info common" calls */ 
+  
+  tmp = allocate_common_entry_node();
+  
+  tmp->next = NULL;
+  tmp->symbol = entry_sym_ptr;
+  
+  if (current_common == NULL)
+    error("Attempt to add COMMON entry with no block open!");
+  else         
+    {
+      if (current_common->entries == NULL)
+	{
+	  current_common->entries = tmp;
+	  current_common->end_of_entries = tmp; 
+	}
+      else
+	{
+	  current_common->end_of_entries->next = tmp; 
+	  current_common->end_of_entries = tmp; 
+	}
+    }
+  
+  
+}
+
+/* This routine finds the first encountred COMMON block named "name" */ 
+
+SAVED_F77_COMMON_PTR find_first_common_named(name)
+     char *name; 
+{
+  
+  SAVED_F77_COMMON_PTR tmp;
+  
+  tmp = head_common_list;
+  
+  while (tmp != NULL)
+    {
+      if (STREQ(tmp->name,name))
+	return(tmp);
+      else
+	tmp = tmp->next;
+    }
+  return(NULL); 
+}
+
+/* This routine finds the first encountred COMMON block named "name" 
+   that belongs to function funcname */ 
+
+SAVED_F77_COMMON_PTR find_common_for_function(name, funcname)
+     char *name;
+     char *funcname; 
+{
+  
+  SAVED_F77_COMMON_PTR tmp;
+  
+  tmp = head_common_list;
+  
+  while (tmp != NULL)
+    {
+      if (STREQ(tmp->name,name) && STREQ(tmp->owning_function,funcname))
+	return(tmp);
+      else
+	tmp = tmp->next;
+    }
+  return(NULL); 
+}
+
+
+
+
+/* The following function is called to patch up the offsets 
+   for the statics contained in the COMMON block named
+   "name."  */ 
+
+
+void patch_common_entries (blk, offset, secnum)
+     SAVED_F77_COMMON_PTR blk;
+     CORE_ADDR offset;
+     int secnum;
+{
+  COMMON_ENTRY_PTR entry;
+  
+  blk->offset = offset;  /* Keep this around for future use. */ 
+  
+  entry = blk->entries;
+  
+  while (entry != NULL)
+    {
+      SYMBOL_VALUE (entry->symbol) += offset; 
+      SYMBOL_SECTION (entry->symbol) = secnum;
+      
+      entry = entry->next;
+    }
+  blk->secnum = secnum; 
+}
+
+
+/* Patch all commons named "name" that need patching.Since COMMON
+   blocks occur with relative infrequency, we simply do a linear scan on
+   the name.  Eventually, the best way to do this will be a
+   hashed-lookup.  Secnum is the section number for the .bss section
+   (which is where common data lives). */
+
+
+void patch_all_commons_by_name (name, offset, secnum)
+     char *name;
+     CORE_ADDR offset;
+     int secnum;
+{
+  
+  SAVED_F77_COMMON_PTR tmp;
+  
+  /* For blank common blocks, change the canonical reprsentation 
+     of a blank name */
+  
+  if ((STREQ(name,BLANK_COMMON_NAME_ORIGINAL)) ||
+      (STREQ(name,BLANK_COMMON_NAME_MF77)))
+    {
+      free(name);
+      name = alloca(strlen(BLANK_COMMON_NAME_LOCAL) + 1); 
+      strcpy(name,BLANK_COMMON_NAME_LOCAL); 
+    }
+  
+  tmp = head_common_list;
+  
+  while (tmp != NULL)
+    {
+      if (COMMON_NEEDS_PATCHING(tmp))
+	if (STREQ(tmp->name,name))
+	  patch_common_entries(tmp,offset,secnum); 
+      
+      tmp = tmp->next;
+    }   
+  
+}
+
+
+
+
+
+/* This macro adds the symbol-number for the start of the function 
+   (the symbol number of the .bf) referenced by symnum_fcn to a 
+   list.  This list, in reality should be a FIFO queue but since 
+   #line pragmas sometimes cause line ranges to get messed up 
+   we simply create a linear list.  This list can then be searched 
+   first by a queueing algorithm and upon failure fall back to 
+   a linear scan. */ 
+
+#define ADD_BF_SYMNUM(bf_sym,fcn_sym) \
+  \
+  if (saved_bf_list == NULL) \
+{ \
+    tmp_bf_ptr = allocate_saved_bf_node(); \
+      \
+	tmp_bf_ptr->symnum_bf = (bf_sym); \
+	  tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
+	    tmp_bf_ptr->next = NULL; \
+	      \
+		current_head_bf_list = saved_bf_list = tmp_bf_ptr; \
+		  saved_bf_list_end = tmp_bf_ptr; \
+		  } \
+else \
+{  \
+     tmp_bf_ptr = allocate_saved_bf_node(); \
+       \
+         tmp_bf_ptr->symnum_bf = (bf_sym);  \
+	   tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
+	     tmp_bf_ptr->next = NULL;  \
+	       \
+		 saved_bf_list_end->next = tmp_bf_ptr;  \
+		   saved_bf_list_end = tmp_bf_ptr; \
+		   } 
+
+
+/* This function frees the entire (.bf,function) list */ 
+
+void 
+  clear_bf_list()
+{
+  
+  SAVED_BF_PTR tmp = saved_bf_list;
+  SAVED_BF_PTR next = NULL; 
+  
+  while (tmp != NULL)
+    {
+      next = tmp->next;
+      free(tmp);
+      tmp=next;
+    }
+  saved_bf_list = NULL;
+}
+
+int global_remote_debug;
+
+long
+get_bf_for_fcn (the_function)
+     long the_function;
+{
+  SAVED_BF_PTR tmp;
+  int nprobes = 0;
+  long retval = 0; 
+  
+  /* First use a simple queuing algorithm (i.e. look and see if the 
+     item at the head of the queue is the one you want)  */
+  
+  if (saved_bf_list == NULL)
+    fatal ("cannot get .bf node off empty list"); 
+  
+  if (current_head_bf_list != NULL) 
+    if (current_head_bf_list->symnum_fcn == the_function)
+      {
+	if (global_remote_debug) 
+	  fprintf(stderr,"*"); 
+
+	tmp = current_head_bf_list; 
+	current_head_bf_list = current_head_bf_list->next;
+	return(tmp->symnum_bf); 
+      }
+  
+  /* If the above did not work (probably because #line directives were 
+     used in the sourcefile and they messed up our internal tables) we now do
+     the ugly linear scan */
+  
+  if (global_remote_debug) 
+    fprintf(stderr,"\ndefaulting to linear scan\n"); 
+  
+  nprobes = 0; 
+  tmp = saved_bf_list;
+  while (tmp != NULL)
+    {
+      nprobes++; 
+      if (tmp->symnum_fcn == the_function)
+	{ 
+	  if (global_remote_debug)
+	    fprintf(stderr,"Found in %d probes\n",nprobes);
+	  current_head_bf_list = tmp->next;
+	  return(tmp->symnum_bf);
+	} 
+      tmp= tmp->next; 
+    }
+  
+  return(-1); 
+}
+
+static SAVED_FUNCTION_PTR saved_function_list=NULL; 
+static SAVED_FUNCTION_PTR saved_function_list_end=NULL; 
+
+void clear_function_list()
+{
+  SAVED_FUNCTION_PTR tmp = saved_function_list;
+  SAVED_FUNCTION_PTR next = NULL; 
+  
+  while (tmp != NULL)
+    {
+      next = tmp->next;
+      free(tmp);
+      tmp = next;
+    }
+  
+  saved_function_list = NULL;
+}