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/*

    		 Crown Copyright (c) 1997

    This TenDRA(r) Computer Program is subject to Copyright

    owned by the United Kingdom Secretary of State for Defence

    acting through the Defence Evaluation and Research Agency

    (DERA).  It is made available to Recipients with a

    royalty-free licence for its use, reproduction, transfer

    to other parties and amendment for any purpose not excluding

    product development provided that any such use et cetera

    shall be deemed to be acceptance of the following conditions:-

        (1) Its Recipients shall ensure that this Notice is

        reproduced upon any copies or amended versions of it;

        (2) Any amended version of it shall be clearly marked to

        show both the nature of and the organisation responsible

        for the relevant amendment or amendments;

        (3) Its onward transfer from a recipient to another

        party shall be deemed to be that party's acceptance of

        these conditions;

        (4) DERA gives no warranty or assurance as to its

        quality or suitability for any purpose and DERA accepts

        no liability whatsoever in relation to any use to which

        it may be put.

*/

/**********************************************************************

$Author: release $

$Date: 1998/02/04 10:43:43 $

$Revision: 1.2 $

$Log: mipsdiags.c,v $

 * Revision 1.2  1998/02/04  10:43:43  release

 * Changes during testing.

 *

 * Revision 1.1.1.1  1998/01/17  15:56:06  release

 * First version to be checked into rolling release.

 *

 * Revision 1.3  1995/09/12  10:59:34  currie

 * gcc pedanttry

 *

 * Revision 1.2  1995/08/16  16:06:54  currie

 * Shortened some .h names

 *

 * Revision 1.1  1995/04/13  09:08:06  currie

 * Initial revision

 *

***********************************************************************/

/*****************************************************************

                           mipsdiags.c

Provides the routines for outputting diagnostic information, suitable for

MIPS dbx.

These diagnostics, in the absence of any documentation, have been

produced in a suck-it-and-see mode, but they are vaguely based

around the syms modules provided in the system library.

********************************************************************/

#include "config.h"

#include "cross_config.h"

#ifndef CROSS_INCLUDE

#include <symconst.h>

#else

#include CROSS_INCLUDE/symconst.h>

#endif

#include "common_types.h"

#include "symtab.h"

#include "exptypes.h"

#include "shapemacs.h"

#include "expmacs.h"

#include "exp.h"

#include "procrectypes.h"

#include "tags.h"

#include "bitsmacs.h"

#include "diagtypes.h"

#include "xalloc.h"

#include "ibinasm.h"

#include "out_ba.h"

#include "syms.h"

#include "diag_fns.h"

#include "locate.h"

#include "mipsdiags.h"

#include "diagglob.h"

#include "mark_scope.h"

#include "basicread.h"

#include "new_code.h"

#include "new_symbol.h"

extern  FILE * as_file;

extern long currentfile;

 /* our current fileno  */

extern long mainfile;

 /* default fileno for no diags or shape output */

extern long fscopefile;		/* file of currect proc */

int  *file_dnos;		/* dense nos for files */

filename * fds;

int nofds = 0;

int szfds = 0;

void collect_files

    PROTO_N ( (f) )

    PROTO_T ( filename f )

{

	if (nofds>=szfds) {

		fds = (filename*)xrealloc(fds, (szfds+=5)*sizeof(filename));

	}

	fds[nofds++] = f;

}

int find_file

    PROTO_N ( (f) )

    PROTO_T ( char * f )

{

   int i;

   for(i=0; i<nofds; i++) {

   	if (strcmp(f, fds[i]->file.ints.chars)==0) return i;

   }

   return 0;

}

void symnosforfiles

    PROTO_Z ()

{	/* produce symnos for all text files in compilation */

  int   i;

  file_dnos = (int *) xcalloc (nofds, sizeof (int));

  for (i = 0; i < nofds; i++) {

    file_dnos[i] = new_lsym_d (fds[i]->file.ints.chars, 0, stFile, scText, (diag_type)0, i);

  }

}

static void x

    PROTO_N ( (i) )

    PROTO_T ( int i )

{

  if (i == EOF) {

    failer ("can't output");

    exit (EXIT_FAILURE);

  };

  return;

}

void stab_file

    PROTO_N ( (i) )

    PROTO_T ( int i )

{	/* output .file directive for file i */

  int   l;

  if (currentfile == i)

    return;

  l = strlen (fds[i]->file.ints.chars);

  if (as_file) {

    x (fprintf (as_file, "\t.file\t%d \"%s\"\n", file_dnos[i], fds[i]->file.ints.chars));

  }

  out_value (file_dnos[i], ifile, l, 0);

  out_data (fds[i]->file.ints.chars, l);

  currentfile = i;

}

long  currentlno = -1;		/* the last line number output */

void stabd (findex, lno)	/* output .loc directive */

long  findex,

      lno;

{

  if (findex==currentfile && lno==currentlno) return;

  stab_file (findex);

  if (as_file)

    x (fprintf (as_file, "\t.loc\t%d %ld\n", file_dnos[findex], lno));

  out_loc (file_dnos[findex], lno);

  currentlno = lno;

}

static char *lexlev = "0";	/* historic !!! */

void diagbr_open

    PROTO_N ( (findex) )

    PROTO_T ( long findex )

{/* block begin directive */

  int   symno;

  stab_file (findex);

  symno = new_lsym_d ((char *) 0, 0, stBlock, scText, (diag_type)0,

      currentfile);

  lexlev[0]++;

  if (as_file)

    x (fprintf (as_file, "\t.bgnb\t%d\n", symno));

  out_ent (symno, ibgnb, 0);

}

void diagbr_close

    PROTO_N ( (findex) )

    PROTO_T ( long findex )

{/* block end directive */

  int   symno;

  stab_file (findex);

  symno = new_lsym_d ((char *) 0, 0, stEnd, scText, (diag_type)0,

      currentfile);

  lexlev[0]--;

  if (as_file)

    x (fprintf (as_file, "\t.endb\t%d\n", symno));

  out_ent (symno, iendb, 0);

}

void stab_local

    PROTO_N ( (nm, dt, ldid, disp, findex) )

    PROTO_T ( char *nm X diag_type dt X exp ldid X long disp X long findex )

{

                            /* output appropriate rubbish to symbol

                               table to indicate the declaration of a

                               local identifier, nm, defined by id,

                               displaced by disp; findex is the index

                               of the file containing the declaration.

                                The text below gives o/p for

                               identifiers allocated in registers; in

                               fact, with current translator, none are

                               used by stab_local. I don't even know

                               whether the MIPS dbx can actually use

                               them. */

  long  fs = frame_size >> 3;

  exp id = son(ldid);

  short   sc;

  long  v;

  disp+=no(ldid);

again:

  if (name (id) == ident_tag) {

    if ((props (id) & defer_bit) == 0) {

      if ((props (id) & inreg_bits) != 0) {

	sc = scRegister;

	v = no (id);

	if (as_file)

	  x (fprintf (as_file, " # %s is in $%ld\n", nm, v));

      }

      else

	if ((props (id) & infreg_bits) != 0) {

	  sc = scRegister;

	  v = (no (id) << 1) + float_register;

	  if (as_file)

	    x (fprintf (as_file, " # %s is in $f%ld\n", nm, v - float_register));

	}

	else {

	  v = ((no (id) & ~0x3f) >> 4) + (locals_offset >> 3) + disp / 8 - fs;

	  sc = scAbs;

	  if (as_file)

	    x (fprintf (as_file,

		  " # %s is in %ld($fp)  == %ld($29)\n", nm,

		  v, v + fs));

	}

      IGNORE new_lsym_d (nm, v, (isparam(id))?stParam :stLocal, sc, dt, findex);

    }

    else {

      exp sn = son (id);

      long  d = disp;

      while (sn != nilexp) {

	switch (name(sn)) {

	  case name_tag:

	    {

	      disp = d + no (sn);

	      id = son (sn);

	      if (isvar (id)) dt = dt->data.ptr.object;

	      goto again;

	    }

	  case reff_tag: {

	      d += no (sn);

	      sn = son (sn);

	      break;

	    }

	  case cont_tag: {

	      sn = son (sn);

	      break;

	    }

	  default:

	    return;

	    }

      }

    }

  }

}

void output_diag

    PROTO_N ( (d, proc_no, e) )

    PROTO_T ( diag_info *d X int proc_no X exp e )

{

    exp x;

    if (d->key == DIAG_INFO_SOURCE) {

    	sourcemark * s = & d->data.source.beg;

    	int f = find_file(s->file->file.ints.chars);

    	stabd(f, s->line_no.nat_val.small_nat);

	return;

    }

    if (d->key != DIAG_INFO_ID) return;

    x = d->data.id_scope.access;

    if (isglob(son(x)) || no(son(x))==1) return;

    	    /* can't output global values as local names in dbx

    	         && not only diag use */

    mark_scope(e);

    if (props(e) & 0x80) {

    	stabd(currentfile, currentlno+1); /* don't have proper lineno */

    	diagbr_open(currentfile);

    }

    stab_local(d->data.id_scope.nme.ints.chars, d->data.id_scope.typ,

                    x,0,currentfile);

    if (last_param(son(x))) {

   	stabd(currentfile, currentlno+1); /* don't have proper lineno */

    }

}

void output_end_scope

    PROTO_N ( (d, e) )

    PROTO_T ( diag_info *d X exp e )

{

    if (d->key == DIAG_INFO_SOURCE) {

    	sourcemark * s = & d->data.source.end;

    	int f = find_file(s->file->file.ints.chars);

    	long lno = s->line_no.nat_val.small_nat;

    	stabd(f, lno);

	return;

    }

    if (d -> key == DIAG_INFO_ID && props(e) & 0x80) {

    	diagbr_close(currentfile);

    }

}

/****************************************************************

	The following procs are concerned with expressing TDF

	types as dbx types.  The possible circularity of types and

	the vagaries of the type representation contribute to their

	complication.

****************************************************************/

typedef struct {

  char *n;

  long  v;

  int   st;

  int   sc;

  diag_type s;

}               tsym;

static int  notsyms = 0;

static int  nexttsym = 0;

static  tsym * ats = (tsym *) 0;

 /* used to accumulate all the type reprs arising from shapes in the

    program by calling addtsym .... */

void addtsym

    PROTO_N ( (n ,v, st, sc, s) )

    PROTO_T ( char *n X long v X int st X int sc X diag_type s )

{

  tsym * a;

  if (nexttsym >= notsyms) {

    ats = (tsym *) xrealloc ((char *) ats, (nexttsym + 100) * sizeof (tsym));

    notsyms = nexttsym + 100;

  }

  a = &ats[nexttsym++];

  a -> n = n;

  a -> v = v;

  a -> st = st;

  a -> sc = sc;

  a -> s = s;

  return;

}

typedef struct {

  diag_type sutype;

  int   symindex;

}               shauxt;

static int  noshaux = 0;

int   nextshaux = 0;

shauxt * shaux = (shauxt *) 0;

 /* used to remember all the indexes into the auxilliary symbol table for

    all the shapes in the program */

bool eq_sutype

    PROTO_N ( (a, b) )

    PROTO_T ( diag_type a X diag_type b )

{

   diag_field_list  fa;

   diag_field_list  fb;

   int j;

   if (a==b) return 1;

   if (a->key != b->key) return 0;

   if (a->key != DIAG_TYPE_STRUCT && a->key != DIAG_TYPE_UNION) return 0;

   if (strcmp(a->data.t_struct.nme.ints.chars, b->data.t_struct.nme.ints.chars))

   	return 0;

   fa = a->data.t_struct.fields;

   fb = b->data.t_struct.fields;

   if (fa->lastused != fb->lastused) return 0;

   for(j=fa->lastused-1; j>=0; j--) {

       diag_field sfa = (fa->array)[j];

       diag_field sfb = (fb->array)[j];

       if (strcmp(sfa->field_name.ints.chars, sfb->field_name.ints.chars))

       		return 0;

   }

   return eq_shape(a->data.t_struct.tdf_shape, b->data.t_struct.tdf_shape);

}

long  find_aux

    PROTO_N ( (s) )

    PROTO_T ( diag_type s /* struct or union shape */ )

{

				/* finds the index into the auxilliary

				   table for type s */

  int   i;

  for (i = 0; i < nextshaux; i++) {

    if (eq_sutype(s, shaux[i].sutype) )

      return shaux[i].symindex;

  }

  return - 1;

}

static  void addaux

    PROTO_N ( (s, ind) )

    PROTO_T ( diag_type s X int ind )

{

				/* remembers ind as index into aux table

				   for shape s */

          shauxt * x;

  if (nextshaux >= noshaux) {

    shaux =

      (shauxt *) xrealloc ((char *) shaux, (nextshaux + 10) * sizeof (shauxt));

  }

  x = &shaux[nextshaux++];

  x -> sutype = s;

  x -> symindex = ind;

}

static diag_tagdef ** su_diags = (diag_tagdef**)0;

static long no_of_sus = 0;

static long leng_sus = 0;

void OUTPUT_DIAG_TAGS

    PROTO_Z ()

{

  diag_tagdef ** di = unit_ind_diagtags;

  unsigned long n = unit_no_of_diagtags;

  long i;

  long il = no_of_sus;

  for (i=0; i<n; ++i)

   {

     diag_type d = di[i]->d_type;

     switch (d -> key)

      {

        case DIAG_TYPE_STRUCT:

        case DIAG_TYPE_UNION: {

            int j;

            for(j=0; j < il; j++) {

               if (eq_sutype(d, su_diags[j]->d_type)) break;

            }

            if (j!=il) break;

	    if (no_of_sus >= leng_sus) {

	    	su_diags = (diag_tagdef**)xrealloc(su_diags,

	    			(leng_sus+=20)*sizeof(diag_tagdef*) );

	    }

	    su_diags[no_of_sus++] = di[i];

            break;

        }

        default: break;

      };

   };

  return;

}

void stab_types

    PROTO_Z ()

{		/* outputs symbol table info for all

		   struct & union  in program */

  int   i;

  int   firsts = get_sym_index (mainfile);

  for (i = 0; i < no_of_sus; ++i) {/* treat struct shapes */

    int   j;

    diag_tagdef * sc = su_diags[i];

    switch (sc->d_type->key) {

    	case DIAG_TYPE_STRUCT: case DIAG_TYPE_UNION: {

    	   diag_field_list  fields = sc->d_type->data.t_struct.fields;

    	   shape s = sc->d_type->data.t_struct.tdf_shape;

    	   char * nme = sc->d_type->data.t_struct.nme.ints.chars;

    	   addaux(sc->d_type, nexttsym+firsts);

    	   addtsym(nme, shape_size(s)>>3, stBlock, scInfo, sc->d_type);

    	   for(j=fields->lastused-1; j>=0; j--) {

    	   	diag_field sf = (fields->array)[j];

    	   	addtsym(sf->field_name.ints.chars, no(sf->where), stMember, scInfo, sf->field_type);

    	   }

    	   break;

    	}

    	default: ;

    }

    addtsym ("", 0, stEnd, scInfo, (diag_type)0);

  }

  for (i = 0; i < nexttsym; i++) {/* output accumulated type info */

    tsym * t = &ats[i];

    {

      IGNORE new_lsym (t -> n, t -> v, t -> st, t -> sc, t->s, mainfile);

    }

  }

  for (i = 0; i < unit_diagvar_tab.lastused; ++i) {/* associated names of types */

	diag_descriptor * dd = unit_diagvar_tab.array+i;

	if (dd->key == DIAG_TYPEDEF_KEY) {

	   IGNORE new_lsym_d(dd->data.typ.nme.ints.chars, 0, stTypedef, scInfo,

	   			dd->data.typ.new_type, mainfile);

	}

  }

  xfree (ats);

  return;

}