Martin adds condition,ignore cmds

[fw/sdcc] / debugger / mcs51 / cmd.c

/*-------------------------------------------------------------------------
    cmd.c - source  file for debugger command execution

              Written By -  Sandeep Dutta . sandeep.dutta@usa.net (1999)

   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, 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
   
   In other words, you are welcome to use, share and improve this program.
   You are forbidden to forbid anyone else to use, share and improve
   what you give them.   Help stamp out software-hoarding!  
-------------------------------------------------------------------------*/

#include "sdcdb.h"
#include "symtab.h"
#include "simi.h"
#include "break.h"
#include "cmd.h"
#include "newalloc.h"

/* default number of lines to list out */
#define LISTLINES 10
static int listlines = LISTLINES;

/* mainly used to retain a reference to the active module being
   listed.  May be used as a general context for other commands if
   no better context is available */
static module *list_mod = NULL;

EXTERN_STACK_DCL(callStack,function *,1024);

#if defined(__APPLE__) && defined(__MACH__)
static char *copying=
{" GNU GENERAL PUBLIC LICENSE Version 2"};
static char *warranty=
{" NO WARRANTY"};
#else
static char *copying=
"                   GNU GENERAL PUBLIC LICENSE\n"
"                       Version 2, June 1991\n"
"\n"
" Copyright (C) 1989, 1991 Free Software Foundation, Inc.\n"
" 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA\n"
" Everyone is permitted to copy and distribute verbatim copies\n"
" of this license document, but changing it is not allowed.\n"
"\n"
"                            Preamble\n"
"\n"
"  The licenses for most software are designed to take away your\n"
"freedom to share and change it.  By contrast, the GNU General Public\n"
"License is intended to guarantee your freedom to share and change free\n"
"software--to make sure the software is free for all its users.  This\n"
"General Public License applies to most of the Free Software\n"
"Foundation's software and to any other program whose authors commit to\n"
"using it.  (Some other Free Software Foundation software is covered by\n"
"the GNU Library General Public License instead.)  You can apply it to\n"
"your programs, too.\n"
"\n"
"  When we speak of free software, we are referring to freedom, not\n"
"price.  Our General Public Licenses are designed to make sure that you\n"
"have the freedom to distribute copies of free software (and charge for\n"
"this service if you wish), that you receive source code or can get it\n"
"if you want it, that you can change the software or use pieces of it\n"
"in new free programs; and that you know you can do these things.\n"
"\n"
"  To protect your rights, we need to make restrictions that forbid\n"
"anyone to deny you these rights or to ask you to surrender the rights.\n"
"These restrictions translate to certain responsibilities for you if you\n"
"distribute copies of the software, or if you modify it.\n"
"\n"
"  For example, if you distribute copies of such a program, whether\n"
"gratis or for a fee, you must give the recipients all the rights that\n"
"you have.  You must make sure that they, too, receive or can get the\n"
"source code.  And you must show them these terms so they know their\n"
"rights.\n"
"\n"
"  We protect your rights with two steps: (1) copyright the software, and\n"
"(2) offer you this license which gives you legal permission to copy,\n"
"distribute and/or modify the software.\n"
"\n"
"  Also, for each author's protection and ours, we want to make certain\n"
"that everyone understands that there is no warranty for this free\n"
"software.  If the software is modified by someone else and passed on, we\n"
"want its recipients to know that what they have is not the original, so\n"
"that any problems introduced by others will not reflect on the original\n"
"authors' reputations.\n"
"\n"
"  Finally, any free program is threatened constantly by software\n"
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"program will individually obtain patent licenses, in effect making the\n"
"program proprietary.  To prevent this, we have made it clear that any\n"
"patent must be licensed for everyone's free use or not licensed at all.\n"
"\n"
"  The precise terms and conditions for copying, distribution and\n"
"modification follow.\n"
"^L\n"
"                    GNU GENERAL PUBLIC LICENSE\n"
"   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION\n"
"\n"
"  0. This License applies to any program or other work which contains\n"
"a notice placed by the copyright holder saying it may be distributed\n"
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"the term \"modification\".)  Each licensee is addressed as \"you\".\n"
"\n"
"Activities other than copying, distribution and modification are not\n"
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"is covered only if its contents constitute a work based on the\n"
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"  1. You may copy and distribute verbatim copies of the Program's\n"
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"copyright notice and disclaimer of warranty; keep intact all the\n"
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"\n"
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"\n"
"    c) If the modified program normally reads commands interactively\n"
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"your rights to work written entirely by you; rather, the intent is to\n"
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"collective works based on the Program.\n"
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"with the Program (or with a work based on the Program) on a volume of\n"
"a storage or distribution medium does not bring the other work under\n"
"the scope of this License.\n"
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"\n"
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"\n"
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"access to copy the source code from the same place counts as\n"
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"^L\n"
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"to distribute software through any other system and a licensee cannot\n"
"impose that choice.\n"
"\n"
"This section is intended to make thoroughly clear what is believed to\n"
"be a consequence of the rest of this License.\n"
"\n"
"  8. If the distribution and/or use of the Program is restricted in\n"
"certain countries either by patents or by copyrighted interfaces, the\n"
"original copyright holder who places the Program under this License\n"
"may add an explicit geographical distribution limitation excluding\n"
"those countries, so that distribution is permitted only in or among\n"
"countries not thus excluded.  In such case, this License incorporates\n"
"the limitation as if written in the body of this License.\n"
"\n"
"  9. The Free Software Foundation may publish revised and/or new versions\n"
"of the General Public License from time to time.  Such new versions will\n"
"be similar in spirit to the present version, but may differ in detail to\n"
"address new problems or concerns.\n"
"\n"
"Each version is given a distinguishing version number.  If the Program\n"
"specifies a version number of this License which applies to it and \"any\n"
"later version\", you have the option of following the terms and conditions\n"
"either of that version or of any later version published by the Free\n"
"Software Foundation.  If the Program does not specify a version number of\n"
"this License, you may choose any version ever published by the Free Software\n"
"Foundation.\n"
"\n"
"  10. If you wish to incorporate parts of the Program into other free\n"
"programs whose distribution conditions are different, write to the author\n"
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"Software Foundation, write to the Free Software Foundation; we sometimes\n"
"make exceptions for this.  Our decision will be guided by the two goals\n"
"of preserving the free status of all derivatives of our free software and\n"
"of promoting the sharing and reuse of software generally.\n";

static char *warranty=
"                            NO WARRANTY\n"
"\n"
"  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY\n"
"FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN\n"
"OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES\n"
"PROVIDE THE PROGRAM \"AS IS\" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED\n"
"OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF\n"
"MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS\n"
"TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE\n"
"PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,\n"
"REPAIR OR CORRECTION.\n"
"\n"
"  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING\n"
"WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR\n"
"REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,\n"
"INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING\n"
"OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED\n"
"TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY\n"
"YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER\n"
"PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE\n"
"POSSIBILITY OF SUCH DAMAGES.\n";
#endif

static void printTypeInfo(link *);
static void printValAggregates (symbol *,link *,char,unsigned int,int);
static  int printOrSetSymValue (symbol *sym, context *cctxt, 
                                int flg, int dnum, int fmt, 
                                char *rs, char *val, char cmp);

int srcMode = SRC_CMODE ;
static set  *dispsymbols = NULL   ; /* set of displayable symbols */
static int currentFrame = 0;        /* actual displayed frame     */
/*-----------------------------------------------------------------*/
/* funcWithName - returns function with name                       */
/*-----------------------------------------------------------------*/
DEFSETFUNC(funcWithName)
{
    function *func = item;
    V_ARG(char *,name);
    V_ARG(function **,funcp);

    if (*funcp)
        return 0;

    if (strcmp(func->sym->name,name) == 0) {
        *funcp = func;
        return 1;
    }
    
    return 0;
}

/*-----------------------------------------------------------------*/
/* symWithAddr - look for symbol with sfr / sbit address           */
/*-----------------------------------------------------------------*/
DEFSETFUNC(symWithAddr)
{
    symbol *sym = item;
    V_ARG(unsigned long,laddr);
    V_ARG(int    ,laddrspace);
    V_ARG(symbol **,rsym);

    if (*rsym)
        return 0;

    if ( sym->addr == laddr &&
         sym->addrspace == laddrspace ) 
    {
        *rsym = sym;
        return 1;
    }

    return 0;
}

/*-----------------------------------------------------------------*/
/* setBPatModLine - set break point at the line specified for the  */
/*-----------------------------------------------------------------*/
static void setBPatModLine (module *mod, int line, char bpType )
{
  int next_line;

    /* look for the first executable line after the line
       specified & get the break point there */    
    if (srcMode == SRC_CMODE && line > mod->ncLines) {
        fprintf(stderr,"No line %d in file \"%s\".\n",
                line,mod->c_name);
        return ;
    }
    
    if (srcMode == SRC_AMODE && line > mod->nasmLines) {
        fprintf(stderr,"No line %d in file \"%s\".\n",
                line,mod->asm_name);
        return ;
    }

    next_line = line;
    for ( ; next_line < (srcMode == SRC_CMODE ? mod->ncLines : mod->nasmLines ) ; 
          next_line++ ) {
        if (srcMode == SRC_CMODE) {
            if (mod->cLines[next_line]->addr) {
                setBreakPoint (mod->cLines[next_line]->addr, CODE, bpType, 
                               userBpCB, mod->c_name, next_line);
                return;
//              break;
            }
        }
        else {
           if (mod->asmLines[next_line]->addr) {
               setBreakPoint (mod->asmLines[next_line]->addr, CODE, bpType, 
                              userBpCB, mod->asm_name, next_line);
                return;
//             break;
           } 
        }
    }

        fprintf(stderr,"No line %d or after in file \"%s\"..\n",
                        line,mod->c_name);

    return;
}

/*-----------------------------------------------------------------*/
/* clearBPatModLine - clr break point at the line specified        */
/*-----------------------------------------------------------------*/
static void clearBPatModLine (module *mod, int line)
{
    /* look for the first executable line after the line
       specified & get the break point there */
    if (srcMode == SRC_CMODE && line > mod->ncLines) {
        fprintf(stderr,"No line %d in file \"%s\".\n",
                line,mod->c_name);
        return ;
    }
    
    if (srcMode == SRC_AMODE && line > mod->ncLines) {
        fprintf(stderr,"No line %d in file \"%s\".\n",
                line,mod->c_name);
        return ;
    }    
    
    for ( ; line < (srcMode == SRC_CMODE ? mod->ncLines : mod->nasmLines ) ; 
          line++ ) {
        if (srcMode == SRC_CMODE) 
            if (mod->cLines[line]->addr) {
                clearUSERbp (mod->cLines[line]->addr);                    
                break;
            }
        else
            if (mod->asmLines[line]->addr) {
                clearUSERbp (mod->asmLines[line]->addr);                          
                break;
            }
    }

    return;
}

/*-----------------------------------------------------------------*/
/* moduleLineWithAddr - finds and returns a line  with a given address */
/*-----------------------------------------------------------------*/
DEFSETFUNC(moduleLineWithAddr)
{
    module *mod = item;
    int i;

    V_ARG(unsigned int,addr);
    V_ARG(module **,rmod);
    V_ARG(int *,line);

    if (*rmod)
        return 0;

    for (i=0; i < mod->nasmLines; i++ ) 
    {
        if ( mod->asmLines[i]->addr == addr)
        {
            *rmod = mod ;
            if (line )
            {
                *line = 0;
                for ( i=0; i < mod->ncLines; i++ ) 
                {
                    if ( mod->cLines[i]->addr > addr)
                        break;
                    *line = i;
                }
                return 1;
            }
        }
    }

    return 0;
}

/*-----------------------------------------------------------------*/
/* funcWithNameModule - returns functions with a name module combo */
/*-----------------------------------------------------------------*/
DEFSETFUNC(funcWithNameModule) 
{
    function *func = item;
    V_ARG(char *,fname);
    V_ARG(char *,mname);
    V_ARG(function **,funcp);

    if (*funcp)
        return 0;

    if (strcmp(func->sym->name,fname) == 0 &&
        strcmp(func->mod->c_name,mname) == 0) {
        *funcp = func;
        return 1;
    }

    return 0;
}

/*-----------------------------------------------------------------*/
/* funcInAddr - given an address returns the function              */
/*-----------------------------------------------------------------*/
DEFSETFUNC(funcInAddr)
{
    function *func = item;
    V_ARG(unsigned int,addr);
    V_ARG(function **,funcp);

    if (*funcp)
        return 0;

    /* in the address range */
    if (func->sym->addr <= addr &&
        func->sym->eaddr >= addr) {
        
        *funcp = func;
        return 1;
    }

    return 0;       
}

/*-----------------------------------------------------------------*/
/* setStepBp - will set STEP Bp @ function entry points            */
/*-----------------------------------------------------------------*/
DEFSETFUNC(setStepBp)
{
    function *func = item;
    
    if (func->sym && func->sym->addr ) {
        
        /* set the entry break point */
        setBreakPoint (func->sym->addr , CODE , STEP , 
                       stepBpCB ,func->mod->c_name , func->entryline);

        return 1;
    }

    return 0;
}

/*-----------------------------------------------------------------*/
/* setStepEPBp - sets a given type of bp @ the execution point     */
/*-----------------------------------------------------------------*/
DEFSETFUNC(setStepEPBp)
{
    exePoint *ep = item;
    V_ARG(int,bptype);
    V_ARG(char *,mname);
   
    setBreakPoint (ep->addr, CODE, bptype, 
                   stepBpCB, mname, ep->line);
    return 1;
}

/*-----------------------------------------------------------------*/
/* setNextEPBp - sets a given type of bp @ the execution point     */
/*-----------------------------------------------------------------*/
DEFSETFUNC(setNextEPBp)
{
    exePoint *ep = item;
    V_ARG(int,bptype);
    V_ARG(char *,mname);
   
    setBreakPoint (ep->addr, CODE, bptype, 
                   nextBpCB, mname, ep->line);
    return 1;
}

/*-----------------------------------------------------------------*/
/* lineAtAddr - for execution points returns the one with addr     */
/*-----------------------------------------------------------------*/
DEFSETFUNC(lineAtAddr)
{
    exePoint *ep = item;
    V_ARG(unsigned int,addr);
    V_ARG(int *,line);
    V_ARG(int *,block);
    V_ARG(int *,level);

    /* address must be an exact match */
    if (ep->addr == addr) {
        *line = ep->line;
        if (block)
            *block = ep->block ;
        if (level)
            *level = ep->level ;
        return 1;
    }

    return 0;
    
}

/*-----------------------------------------------------------------*/
/* lineNearAddr - for execution points returns the one with addr   */
/*-----------------------------------------------------------------*/
DEFSETFUNC(lineNearAddr)
{
    exePoint *ep = item;
    V_ARG(unsigned int,addr);
    V_ARG(int *,line);
    V_ARG(int *,block);
    V_ARG(int *,level);

    /* the line in which the address is */
    if (ep->addr <= addr) {
        *line = ep->line;
        if (block)
            *block = ep->block ;
        if (level)
            *level = ep->level ;
        return 1;
    }

    return 0;
    
}

/*-----------------------------------------------------------------*/
/* discoverContext - find out the current context of the bp        */
/*-----------------------------------------------------------------*/
context *discoverContext (unsigned addr, function *func)
{
    module   *mod  = NULL;
    int line = 0;

    /* find the function we are in */
    if (!func && !applyToSet(functions,funcInAddr,addr,&func)) {
        if (!applyToSet(functions,funcWithName,"main",&func) ||
            !applyToSet(modules,moduleLineWithAddr,addr,&mod,NULL))
        {
            fprintf(stderr, "Error?:discoverContext: cannot apply addr 0x%x\n",addr);
            return NULL;
        }
        currCtxt->func = func;
        currCtxt->addr = addr;
        currCtxt->modName = mod->name;
        currCtxt->cline = func->exitline;
    }
    else
    {
        currCtxt->func = func;
        currCtxt->addr = func->laddr = addr;
        currCtxt->modName = func->modName;
    
        /* find the c line number */
        if(applyToSet(func->cfpoints,lineAtAddr,addr,
                  &line,&currCtxt->block,&currCtxt->level)) 
            currCtxt->cline = func->lline = line;
        else if(applyToSet(func->cfpoints,lineNearAddr,addr,
                  &line,&currCtxt->block,&currCtxt->level)) 
            currCtxt->cline = func->lline = line;
        else
            currCtxt->cline = func->exitline;
    }    
    /* find the asm line number */
    line = 0;
    if (applyToSet(func->afpoints,lineAtAddr,addr,
                   &line,NULL,NULL))
        currCtxt->asmline = line;       
    else
        currCtxt->asmline = -1;
        
    return currCtxt ;
}


/*-----------------------------------------------------------------*/
/* simGo - send 'go' cmd to simulator and wait till a break occurs */
/*-----------------------------------------------------------------*/
void simGo (unsigned int gaddr)
{   
    unsigned int addr ;
    context *ctxt;
    int rv;
    stopCommandList();
 top:    
    if ( userinterrupt )
    {
        userinterrupt = 0;
        return;
    }
    addr = simGoTillBp (gaddr);

    /* got the pc for the break point now first
       discover the program context i.e. module, function 
       linenumber of the source etc, etc etc */
    currentFrame = 0; 
    ctxt = discoverContext (addr, NULL);
    
    /* dispatch all the break point call back functions */
    rv = dispatchCB (addr,ctxt);    
 ret:    

    /* the dispatch call back function will return
       non-zero if an user break point has been hit
       if not then we continue with the execution 
       of the program */
    if (!rv) 
    {
        if ( gaddr == 0 )
            gaddr = -1;
        if ( gaddr == -1 || doingSteps == 1 )
            goto top ;
    }
    
}

/*-----------------------------------------------------------------*/
/* preparePrint - common parse function for                        */
/*                output, print and display                        */
/*-----------------------------------------------------------------*/
static char *preparePrint(char *s, context *cctxt, int *fmt, symbol **sym)
{
    char *bp = s+strlen(s) -1;
    char save_ch ;

    *fmt = FMT_NON;
    *sym = NULL;

    while (isspace(*s)) s++;
    if (!*s) 
        return (char *)0;

    while (isspace(*bp)) bp--;
    bp++ ;
    *bp = '\0';

    if ( *s == '/' )
    {
        /* format of printout */
        switch ( *++s )
        {
            case 'x':
                *fmt = FMT_HEX ;
                break;
            case 'o':
                *fmt = FMT_OCT ;
                break;
            default:
            case 'd':
                *fmt = FMT_DEZ ;
                break;
            case 't':
                *fmt = FMT_BIN ;
                break;
        }
        s++;
        while (isspace(*s)) s++;
    }
    for ( bp = s; *bp && ( isalnum( *bp ) || *bp == '_'); bp++ );
    save_ch = *bp;
    if ( *bp )
        *bp = '\0';

    *sym = symLookup(s,cctxt);
    *bp = save_ch;

    if ( ! *sym )
        fprintf(stdout,"No symbol \"%s\" in current context.\n", s);
    return bp;
}

static int printAsmLine( function *func, module *m, long saddr, long eaddr)
{
    int i,j,delta;
    int symaddr;
    int lastaddr = saddr+1;
    char *symname;

    if ( func )
    {
        symaddr = func->sym->addr;
        symname = func->sym->name;
    }
    else
    {
        symaddr = saddr;
        symname = "" ;
    }
    for (j=0,i=0; i < m->nasmLines; i++ ) 
    {
        if ( saddr >= 0 && m->asmLines[i]->addr < saddr)
        {
                continue;
        }
        if ( eaddr >= 0 && m->asmLines[i]->addr > eaddr)
        {
                continue;
        }
        if ( func && 
            (m->asmLines[i]->addr < func->sym->addr ||
             m->asmLines[i]->addr > func->sym->eaddr ))
        {
            continue;
        } 
        delta = m->asmLines[i]->addr - symaddr;
        if ( delta >= 0 )
        {
            j++;
            lastaddr = m->asmLines[i]->addr;
            printf("0x%08x <%s",lastaddr,symname);
            if (delta > 0) printf("+%d",delta);
            printf(">:\t%s",m->asmLines[i]->src);            
        }
    }
    return lastaddr;
}

/*-----------------------------------------------------------------*/
/* cmdDisasm - disassemble  asm instruction                        */
/*-----------------------------------------------------------------*/
static int cmdDisasm (char *s, context *cctxt, int args)
{
    function *func = NULL;
    long  saddr = -1;
    long  eaddr = -1;
    int   found = 0;
    module *modul;
    /* white space skip */

    if ( args > 0 )
    {
        while (*s && isspace(*s)) s++;

        if ( isdigit(*s))
        {
            saddr = strtol(s,&s,0);
            if ( args > 1 )
            {
                while (*s && isspace(*s)) s++;

                if ( isdigit(*s))
                    eaddr = strtol(s,0,0);
            }
            else
                eaddr = saddr+1;
        }
    }

    if ( eaddr == -1 )
    {       
        /* no start or only start so dump function */
        if ( saddr == -1 )
        {
            func = cctxt->func;
        }
        else
        {
            applyToSet(functions,funcInAddr,saddr,&func);
        }
        if ( func )
        {
            printf("Dump of assembler code for function %s:\n",func->sym->name);
            printAsmLine(func,func->mod,-1,-1);
            printf("End of assembler dump.\n");
            return 0; 
        }
        else
        {
            if (applyToSet(modules,moduleLineWithAddr,saddr,&modul,NULL))
            {
                eaddr = saddr + 5;
                printf("Dump of assembler code:\n");
                printAsmLine(NULL,modul,saddr,eaddr);
                printf("End of assembler dump.\n");
                return 0; 
            }
        }
    }
    else
    {
        if ( args > 1 )
            printf("Dump of assembler code from 0x%08x to 0x%08x:\n",saddr,eaddr);
        found = 0;
        while ( saddr < eaddr )
        {
            func = NULL;
            if (applyToSet(functions,funcInAddr,saddr,&func))
            {
                found = 1;
                modul = func->mod;
            }
            else
            {
                if ( found )
                    break;
                if (!applyToSet(modules,moduleLineWithAddr,saddr,&modul,NULL))
                    break;
            }
            saddr = printAsmLine(func,modul,saddr,eaddr) + 1;
        }
        if( saddr >= eaddr)
        {
            if ( args > 1 )
                printf("End of assembler dump.\n");
            return 0; 
        }
        
    }
    fprintf(stderr,"No function contains specified address.\n");
    return 0; 
}
/*-----------------------------------------------------------------*/
/* cmdDisasm1 - disassemble one asm instruction                    */
/*-----------------------------------------------------------------*/
int cmdDisasm1 (char *s, context *cctxt)
{
    return cmdDisasm( s, cctxt, 1);
}

/*-----------------------------------------------------------------*/
/* cmdDisasmF - disassemble asm instructions                       */
/*-----------------------------------------------------------------*/
int cmdDisasmF(char *s, context *cctxt)
{
    return cmdDisasm( s, cctxt, 2);
}

static int commonSetUserBp(char *s, context *cctxt, char bpType)
{
    char *bp ;
    function *func = NULL;
        
    /* user break point location specification can be of the following
       forms
       a) <nothing>        - break point at current location
       b) lineno           - number of the current module
       c) filename:lineno  - line number of the given file
       e) filename:function- function X in file Y (useful for static functions)
       f) function         - function entry point
       g) *addr            - break point at address 
    */

    if (!cctxt) {
        fprintf(stdout,"No symbol table is loaded.  Use the \"file\" command.\n");
        return 0;
    }
    /* white space skip */
    while (*s && isspace(*s)) s++;
    
    /* null terminate it after stripping trailing blanks*/
    bp = s + strlen(s);
    while (bp != s && isspace(*bp)) bp--;
    *bp = '\0';

    /* case a) nothing */
    /* if nothing given then current location : we know
       the current execution location from the currentContext */
    if (! *s ) {

        /* if current context is known */
        if (cctxt->func) {
            if (srcMode == SRC_CMODE)
                /* set the break point */
                setBreakPoint ( cctxt->addr , CODE , bpType , userBpCB ,
                                cctxt->func->mod->c_name, cctxt->cline);
            else
                setBreakPoint ( cctxt->addr , CODE , bpType , userBpCB ,
                                cctxt->func->mod->asm_name, cctxt->asmline);
                
        }
        else
            fprintf(stderr,"No default breakpoint address now.\n");
                        
        goto ret ;
    }
    /* case g) *addr */
    if ( *s == '*' && isdigit(*(s+1)))
    {
        int  line   = 0;
        long braddr = strtol(s+1,0,0);
        if (!applyToSet(functions,funcInAddr,braddr,&func))
        {
            module *modul;
            if (!applyToSet(modules,moduleLineWithAddr,braddr,&modul,&line))
            {
                fprintf(stderr,"Address 0x%08x not exists in code.\n",braddr); 
            }
            else
            {
                setBreakPoint ( braddr , CODE , bpType , userBpCB ,
                            modul->c_name,line);
            }
            goto ret ;
        }
                else
        {
            int line = func->exitline;
            if ( !applyToSet(func->cfpoints,lineAtAddr,braddr,
                                  &line,NULL,NULL))
                applyToSet(func->cfpoints,lineNearAddr,braddr,&line,NULL,NULL);
            setBreakPoint ( braddr , CODE , bpType , userBpCB ,
                            func->mod->c_name,line);
        }
        goto ret ;
    }
    /* case b) lineno */
    /* check if line number */
    if (isdigit(*s)) {
        /* get the lineno */
        int line = atoi(s) -1;

        /* if current context not present then we must get the module
           which has main & set the break point @ line number provided
           of that module : if current context known then set the bp 
           at the line number given for the current module 
        */
        if (cctxt->func) {
            if (!cctxt->func->mod) {
                if (!applyToSet(functions,funcWithName,"main"))
                    fprintf(stderr,"Function \"main\" not defined.\n");
                else 
                    setBPatModLine(func->mod,line, bpType);
            } else 
                setBPatModLine(cctxt->func->mod,line, bpType);
        } else {
                if (list_mod) {
                        setBPatModLine(list_mod,line, bpType);
                } else {
                  fprintf(stdout,"Sdcdb fails to have module symbol context at %d\n", __LINE__);
                }
        }
        
        goto ret;
    }

    if ((bp = strchr(s,':'))) {
        
        module *mod = NULL;
        *bp = '\0';
        
        if (srcMode == SRC_CMODE) {
            if (!applyToSet(modules,moduleWithCName,s,&mod)) {
                fprintf (stderr,"No source file named %s.\n",s);
                goto ret;
            }
        } else {
            if (!applyToSet(modules,moduleWithAsmName,s,&mod)) {
                fprintf (stderr,"No source file named %s.\n",s);
                goto ret;
            }
        }
                
        /* case c) filename:lineno */
        if (isdigit(*(bp +1))) {                    
         
            setBPatModLine (mod,atoi(bp+1)-1,bpType);       
            goto ret;
            
        }
        /* case d) filename:function */
        if (!applyToSet(functions,funcWithNameModule,bp+1,s,&func)) 
            fprintf(stderr,"Function \"%s\" not defined.\n",bp+1); 
        else        
            setBPatModLine (mod,
                            (srcMode == SRC_CMODE ? 
                             func->entryline :
                             func->aentryline),bpType);
        
        goto ret;
    }
            
    /* case e) function */
    if (!applyToSet(functions,funcWithName,s,&func))
        fprintf(stderr,"Function \"%s\" not defined.\n",s); 
    else
        setBPatModLine(func->mod,
                       (srcMode == SRC_CMODE ?
                        func->entryline :
                        func->aentryline),bpType);

 ret:    
    return 0;
}

/*-----------------------------------------------------------------*/
/* cmdSetTmpUserBp - settempory break point at the user specified location   */
/*-----------------------------------------------------------------*/
int cmdSetTmpUserBp (char *s, context *cctxt)
{
    return commonSetUserBp(s, cctxt, TMPUSER );
}

/*-----------------------------------------------------------------*/
/* cmdSetUserBp - set break point at the user specified location   */
/*-----------------------------------------------------------------*/
int cmdSetUserBp (char *s, context *cctxt)
{
    return commonSetUserBp(s, cctxt, USER );
}

/*-----------------------------------------------------------------*/
/* cmdJump - set program counter                                   */
/*-----------------------------------------------------------------*/
int cmdJump (char *s, context *cctxt)
{
    char *bp ;
    function *func = NULL;
    if (STACK_EMPTY(callStack)) 
    {
        fprintf(stdout,"The program is not running.\n");
        return 0;
    } 

    /* white space skip */
    while (*s && isspace(*s)) s++;
    
    /* null terminate it after stripping trailing blanks*/
    bp = s + strlen(s);
    while (bp != s && isspace(*bp)) bp--;
    *bp = '\0';
    if (! *s ) 
    {
        fprintf(stdout,"No argument: need line or *addr.\n");
        return 0;
    }
    if ( *s == '*' && isdigit(*(s+1)))
    {
        unsigned int addr = atoi(s);
        if (cctxt && cctxt->func &&
            cctxt->func->sym->addr <= addr &&
            cctxt->func->sym->eaddr >= addr)
        {
            simSetPC(addr);
            return 0;
        }
        fprintf(stdout,"Warning addr 0x%x outside actual function.\n",addr);
        simSetPC(addr);
        return 0;
    }
    if (isdigit(*s)) 
    {
        /* get the lineno */
        int line = atoi(s) -1;
        if (!cctxt || !cctxt->func || !cctxt->func->mod) 
        {
                    fprintf(stderr,"Function not defined.\n");
            return 0;
        }
        if (line >= cctxt->func->entryline &&
            line <= cctxt->func->exitline )
        {
            simSetPC(cctxt->func->mod->cLines[line]->addr);
            return 0;
        }
        if (line >= cctxt->func->mod->ncLines )
        {
                    fprintf(stderr,"line not in module.\n");
            return 0;
        }
        fprintf(stdout,"Warning line %d outside actual function.\n",line+1);
        simSetPC(cctxt->func->mod->cLines[line]->addr);
        return 0;
    }
    if ((bp = strchr(s,':'))) 
    {
        int line;
        module *mod = NULL;
        *bp++ = '\0';
        if (!applyToSet(modules,moduleWithCName,s,&mod)) 
        {
            fprintf (stderr,"No source file named %s.\n",s);
            return 0;
        } 
        if (!isdigit(*bp)) 
        {                        
            fprintf (stderr,"No line number.\n");
            return 0;       
        }
        line = atoi(bp) -1;
        if (line >= mod->ncLines )
        {
                    fprintf(stderr,"line not in module.\n");
            return 0;
        }
        if ( mod != cctxt->func->mod ||
             line < cctxt->func->entryline ||
             line > cctxt->func->exitline )
        {
            fprintf(stdout,"Warning line %d outside actual function.\n",
                    line+1);
        }             
        simSetPC(mod->cLines[line]->addr);
    }
    return 0;
}

/*-----------------------------------------------------------------*/
/* cmdListAsm - list assembler source code                         */
/*-----------------------------------------------------------------*/
int cmdListAsm (char *s, context *cctxt)
{
    if (  cctxt && cctxt->func) 
    {
        /* actual line */
        if (printAsmLine(cctxt->func,cctxt->func->mod,
                         (long)cctxt->addr,(long)cctxt->addr))
            return 0; 
    }
    return 0;
}

/*-----------------------------------------------------------------*/
/* cmdSetOption - set debugger options                             */
/*-----------------------------------------------------------------*/
int cmdSetOption (char *s, context *cctxt)
{
    while (*s && isspace(*s)) s++;
    if (strncmp(s,"srcmode",7) == 0 ) {
        if (srcMode == SRC_CMODE)
            srcMode = SRC_AMODE;
        else
            srcMode = SRC_CMODE;
        fprintf(stderr,"source mode set to '%s'\n", 
                (srcMode == SRC_CMODE ? "C" : "asm"));
        return 0;
    }

    if (strncmp(s,"listsize ",9) == 0) 
    {
        listlines = strtol(s+9,0,0);
        if ( listlines < LISTLINES )
            listlines = LISTLINES;
        return 0;
    }

#ifdef SDCDB_DEBUG
    if (strncmp(s,"debug ",6) == 0) 
    {
        sdcdbDebug = strtol(s+6,0,0);
        return 0;
    }
#endif
    if (strncmp(s,"variable ",9) == 0) 
    {
        symbol *sym ;
        int fmt;
        char *rs;
        s += 9;
        if ( !( rs = preparePrint(s, cctxt, &fmt, &sym )))
            return 0;
        s = rs;
        while (*s && *s != '=') s++;
        *s++ = '\0';
        while (isspace(*s)) *s++ = '\0';
        if (*s)
        {
                printOrSetSymValue(sym,cctxt,0,0,0,rs,s,'\0');
                return 0;
        }
        else
            fprintf(stdout,"No new value for \"%s\".\n",s);
        return 0;       
    }

 
    fprintf(stderr,"'set %s' command not yet implemented\n",s);
    return 0;
}

/*-----------------------------------------------------------------*/
/* cmdContinue - continue till next break point                    */
/*-----------------------------------------------------------------*/
int cmdContinue (char *s, context *cctxt)
{
    if (STACK_EMPTY(callStack)) {
        fprintf(stdout,"The program is not being run.\n");
        return 0;
    }

    fprintf(stdout,"Continuing.\n");
    simGo(-1);
    showfull = 1;
    return 0;
}

/*-----------------------------------------------------------------*/
/* cmdIgnore - set ignorecount for breakpoint                      */
/*-----------------------------------------------------------------*/
int cmdIgnore (char *s, context *cctxt)
{   
    int bpnum, cnt ;
    while (isspace(*s)) s++;
    if (!*s ) 
    {
        fprintf(stdout,"Argument required (breakpoint number).\n");
        return 0;
    }
    bpnum = strtol(s,&s,10);
    while (isspace(*s)) s++;
    if (!*s ) 
    {
        fprintf(stdout,"Second argument (specified ignore-count) is missing.");
        return 0;
    }
    cnt = strtol(s,0,10);
    setUserbpIgnCount(bpnum,cnt);
    return 0;
}

/*-----------------------------------------------------------------*/
/* cmdCondition - set condition for breakpoint                     */
/*-----------------------------------------------------------------*/
int cmdCondition (char *s, context *cctxt)
{   
    int bpnum ;
    while (isspace(*s)) s++;
    if (!*s ) 
    {
        fprintf(stdout,"Argument required (breakpoint number).\n");
        return 0;
    }
    bpnum = strtol(s,&s,10);
    while (isspace(*s)) s++;
    if (*s)
        s = Safe_strdup(s);
    else
        s = NULL;
    setUserbpCondition(bpnum,s);
    return 0;
}

/*-----------------------------------------------------------------*/
/* cmdCommands - set commands for breakpoint                       */
/*-----------------------------------------------------------------*/
int cmdCommands (char *s, context *cctxt)
{   
    int bpnum ;
    char *cmds,*line;
    while (isspace(*s)) s++;
    
    if (!*s ) 
        bpnum = getLastBreakptNumber();
    else
        bpnum = strtol(s,0,10);

    cmds = NULL;
    while ((line = getNextCmdLine()))
    {
        while (isspace(*line)) line++;
        if (!strncmp(line,"end",3))
            break;
        if (! cmds )
        {
            cmds = Safe_strdup(line);
        }
        else
        {
            cmds = Safe_realloc( cmds, strlen(cmds) + 1 + strlen(line));
            strcat(cmds,line);
        }
    }
    setUserbpCommand(bpnum,cmds);
    return 0;
}

/*-----------------------------------------------------------------*/
/* cmdDelUserBp - delete user break point                          */
/*-----------------------------------------------------------------*/
int cmdDelUserBp (char *s, context *cctxt)
{
    int bpnum ;
    while (isspace(*s)) s++;
    
    if (!*s ) {
        if (userBpPresent) {
            char buffer[10];
            fprintf (stdout,"Delete all breakpoints? (y or n) ");
            fflush(stdout);
            fgets(buffer,sizeof(buffer),stdin);
            if (toupper(buffer[0]) == 'Y')
                deleteUSERbp(-1);          
        }
        return 0;
    }
    
    /* determine the break point number */
    if (sscanf(s,"%d",&bpnum) == 1)
        deleteUSERbp(bpnum);

    return 0;
}

/*-----------------------------------------------------------------*/
/* cmdStepi - single step exactly one instruction                   */
/*-----------------------------------------------------------------*/
int cmdStepi (char *s, context *cctxt)
{

    if (STACK_EMPTY(callStack))
        fprintf(stdout,"The program is not being run.\n");
    else 
    {
        doingSteps = 2;
            simGo(2);   
        doingSteps = 0;
        showfull = 1;
    }
    return 0;
}

/*-----------------------------------------------------------------*/
/* cmdStep - single step thru C source file                        */
/*-----------------------------------------------------------------*/
int cmdStep (char *s, context *cctxt)
{
    function *func = NULL;

    if (STACK_EMPTY(callStack))
        fprintf(stdout,"The program is not being run.\n");
    else {
        /* if we are @ the end of a function then set
           break points at execution points of the
           function in the call stack... */
        if (cctxt->addr == cctxt->func->sym->eaddr) {
            if ((func = STACK_PEEK(callStack))) {
                if (srcMode == SRC_CMODE)
                    applyToSet (func->cfpoints,setStepEPBp,STEP,
                                func->mod->c_name);     
                else
                    applyToSet (func->afpoints,setStepEPBp,STEP,
                                func->mod->asm_name);
            }
        } else {
            /* set breakpoints at all function entry points
               and all exepoints of this functions & for
               all functions one up in the call stack */
            
            /* all function entry points */
            applyToSet(functions,setStepBp); 
            
            if (srcMode == SRC_CMODE) {
                /* for all execution points in this function */
                applyToSet(cctxt->func->cfpoints,setStepEPBp,STEP,
                           cctxt->func->mod->c_name);
                
                /* set a break point @ the current function's
                   exit */
                setBreakPoint (cctxt->func->sym->eaddr, CODE, STEP , 
                               stepBpCB, cctxt->func->mod->c_name, 
                               cctxt->func->exitline);
                
                /* now break point @ callers execution points */
                if ((func = STACK_PPEEK(callStack))) {
                    applyToSet (func->cfpoints,setStepEPBp,STEP,
                                func->mod->c_name);     
                    /* set bp @ callers exit point */
                    setBreakPoint (func->sym->eaddr, CODE, STEP , 
                                   stepBpCB, func->mod->c_name, 
                                   func->exitline);
                }
            } else {
                /* for all execution points in this function */
                applyToSet(cctxt->func->afpoints,setStepEPBp,STEP,
                           cctxt->func->mod->asm_name);
                
                /* set a break point @ the current function's
                   exit */
                setBreakPoint (cctxt->func->sym->eaddr, CODE, STEP , 
                               stepBpCB, cctxt->func->mod->asm_name, 
                               cctxt->func->aexitline);
                
                /* now break point @ callers execution points */
                if ((func = STACK_PPEEK(callStack))) {
                    
                    applyToSet (func->afpoints,setStepEPBp,STEP,
                                func->mod->asm_name);   
                    
                    /* set bp @ callers exit point */
                    setBreakPoint (func->sym->eaddr, CODE, STEP , 
                                   stepBpCB, func->mod->asm_name, 
                                   func->aexitline);
                }
            }
        }

        doingSteps = 1;
        simGo(2);
        doingSteps = 0;
        showfull = 1;
    }
    return 0;
}

/*-----------------------------------------------------------------*/
/* cmdNexti - next instruction but proceed function call           */
/*-----------------------------------------------------------------*/
int cmdNexti (char *s, context *cctxt)
{
    if (STACK_EMPTY(callStack))
        fprintf(stdout,"The program is not being run.\n");
    else 
    {
        doingSteps = 2;
            simGo(1);   
        doingSteps = 0;
        showfull = 1;
    }   
    return 0;
}

/*-----------------------------------------------------------------*/
/* cmdNext - next executable C statement file                      */
/*-----------------------------------------------------------------*/
int cmdNext (char *s, context *cctxt)
{
    function *func = NULL;
    /* next is almost the same as step except we don't
       we don't set break point for all function entry
       points */
    if (STACK_EMPTY(callStack))
        fprintf(stdout,"The program is not being run.\n");
    else {
        /* if we are @ the end of a function then set
           break points at execution points of the
           function in the call stack... */
        if (cctxt->addr == cctxt->func->sym->eaddr) {
            if ((func = STACK_PEEK(callStack))) {
                if (srcMode == SRC_CMODE)
                    applyToSet (func->cfpoints,setStepEPBp,NEXT,
                                func->mod->c_name);     
                else
                    applyToSet (func->afpoints,setStepEPBp,NEXT,
                                func->mod->asm_name);
            }
        } else {
            if (srcMode == SRC_CMODE) {
                /* for all execution points in this function */
                applyToSet(cctxt->func->cfpoints,setNextEPBp,NEXT,
                           cctxt->func->mod->c_name);
                /* set a break point @ the current function's
                   exit */
                setBreakPoint (cctxt->func->sym->eaddr, CODE, NEXT , 
                               nextBpCB, cctxt->func->mod->c_name, 
                               cctxt->func->exitline);
                
                /* now break point @ callers execution points */        
                if ((func = STACK_PPEEK(callStack))) {
                    applyToSet (func->cfpoints,setNextEPBp,NEXT ,
                                func->mod->c_name);     
                    /* set bp @ callers exit point */
                    setBreakPoint (func->sym->eaddr, CODE, NEXT , 
                                   stepBpCB, func->mod->c_name, 
                                   func->exitline);
                }
            } else {
                /* for all execution points in this function */
                applyToSet(cctxt->func->afpoints,setNextEPBp,NEXT,
                           cctxt->func->mod->asm_name);
                /* set a break point @ the current function's
                   exit */
                setBreakPoint (cctxt->func->sym->eaddr, CODE, NEXT , 
                               nextBpCB, cctxt->func->mod->asm_name, 
                               cctxt->func->aexitline);
                
                /* now break point @ callers execution points */        
                if ((func = STACK_PPEEK(callStack))) {
                    applyToSet (func->cfpoints,setNextEPBp,NEXT ,
                                func->mod->asm_name);   
                    /* set bp @ callers exit point */
                    setBreakPoint (func->sym->eaddr, CODE, NEXT , 
                                   stepBpCB, func->mod->asm_name, 
                                   func->aexitline);
                }
            }
        }
        doingSteps = 1;
        simGo(1);       
        doingSteps = 0;
        showfull = 1;
    }    
    return 0;
}

/*-----------------------------------------------------------------*/
/* cmdRun  - run till next break point                             */
/*-----------------------------------------------------------------*/
int cmdRun (char *s, context *cctxt)
{
    char buff[10];
    if (STACK_EMPTY(callStack)) {
        fprintf(stdout,"Starting program\n");
    if ( ! simactive )
    {
        fprintf(stdout,"No executable file specified.\nUse the \"file\" command.\n");
        return 0;
    }
    resetHitCount();
        simGo(0);
    } else {
        
        fprintf(stdout,
                "The program being debugged has been started already.\n");
        fprintf(stdout,"Start it from the beginning? (y or n) ");
        fflush(stdout);

        fgets(buff,sizeof(buff),stdin);
        if (toupper(buff[0]) == 'Y') {
            simReset();
        resetHitCount();
            simGo(0);
        }
    }
    showfull = 1;
    return 0;
}

/*-----------------------------------------------------------------
 cmdListSymbols - list symbols
|-----------------------------------------------------------------*/
int cmdListSymbols (char *s, context *cctxt)
{
    int our_verbose = 0;
    symbol *sy;
    int i;

    if (strstr(s, "v1")) {
      our_verbose = 1;
    } else if (strstr(s, "v2")) {
      our_verbose = 2;
    }

    printf("[symbols]\n");
    sy = setFirstItem(symbols);
    i = 0;
    for (;;) {
      if (sy == NULL)
        break;
      if (our_verbose <= 1)
        printf("<%s>", sy->name);

      if (our_verbose > 1) {
        printf("  %d) name:%s, size:%d, level:%d block:%d\n", i,
          sy->name, sy->size, sy->level, sy->block);
        printf("    isonstack:%d, isfunc:%d, offset:%d addr:%d\n",
          sy->isonstack, sy->isfunc, sy->offset, sy->addr);
        printf("    eaddr:%d, addr_type:%c, type:%x etype:%x\n",
          sy->eaddr, sy->addr_type, sy->type, sy->etype);
        printf("    scopetype:%c, sname:%s, rname:%s addrspace:%c\n",
          sy->scopetype, sy->sname, sy->rname, sy->addrspace);
        printf("    next:%x\n", sy->next);
      }
      ++i;
      sy = setNextItem(symbols);
    }
    printf("   %d symbols\n", i);
    return 0;
}

/*-----------------------------------------------------------------
 cmdListFunctions - list functions.
|-----------------------------------------------------------------*/
int cmdListFunctions (char *s, context *cctxt)
{
    function *f;
    int i;
    int our_verbose = 0;

    if (strstr(s, "v1")) {
      our_verbose = 1;
    } else if (strstr(s, "v2")) {
      our_verbose = 2;
    }

    printf("[functions]\n");
    f = setFirstItem(functions);
    i = 0;
    for (;;) {
      if (f == NULL)
        break;
      if (our_verbose) {
        printf("  %d) sym:%x, fname:%s, modName:%s, mod:%x\n", i,
          f->sym, f->sym->name, f->modName, f->mod);
        printf("    entryline:%d, aentryline:%d, exitline:%d, aexitline:%d\n",
                f->entryline, f->aentryline, f->exitline, f->aexitline);
        printf("    cfpoints:%x, afpoints:%x, laddr:%x, lline:%d\n",
                f->cfpoints, f->afpoints, f->laddr, f->lline);
      }
      else {
        printf("<%s>", f->modName);
      }
      ++i;
      f = setNextItem(functions);
    }
    printf("   %d functions\n", i);
    return 0;
}

/*-----------------------------------------------------------------
 cmdListModules - list functions.
|-----------------------------------------------------------------*/
int cmdListModules (char *s, context *cctxt)
{
    module *m;
    srcLine *cs, *as;
    int i, mi;
    int our_verbose = 0;

    if (strstr(s, "v1")) {
      our_verbose = 1;
    } else if (strstr(s, "v2")) {
      our_verbose = 2;
    }

    printf("[modules]\n");
    m = setFirstItem(modules);
    mi = 0;
    for (;;) {
      if (m == NULL)
        break;

      if (our_verbose >= 0) {
      printf("  %d) cfullname:%s, afullname:%s, name:%s\n", ++mi,
        m->cfullname, m->afullname, m->name);
      printf("    c_name:%s, asm_name:%s, ncLines:%d, nasmLines:%d\n",
              m->c_name, m->asm_name, m->ncLines, m->nasmLines);
      printf("    cLines:%x, asmLines:%x\n",
              m->cLines, m->asmLines);
      }
      if (our_verbose >= 2) {
        if (m->ncLines) {
          printf("    [cLines] ");
          if ( our_verbose)
          for (i=0; i<m->ncLines; i++ ) {
              cs = m->cLines[i];
              printf("   (%d) addr:%x, block:%d, level:%d, src:%s\n",
                 i, cs->addr, cs->block, cs->level, cs->src);
          }
          if (!our_verbose)
              printf("%d records", i);
        }
        if (m->nasmLines) {
          printf("    [asmLines] ");
          if ( our_verbose)
          for (i=0; i<m->nasmLines; i++ ) {
              as = m->asmLines[i];
              printf("   (%d) addr:%x, block:%d, level:%d, src:%s\n",
                 i, as->addr, as->block, as->level, as->src);
          }
          if (!our_verbose)
              printf("%d records", i);
        }
        printf("\n");
      }

      m = setNextItem(modules);
    }
    return 0;
}

/*-----------------------------------------------------------------
 infoSymbols - This is really just a tool to dump all these
   huge program structures out into human readable form.
|-----------------------------------------------------------------*/
static void infoSymbols(context *ctxt)
{
  int our_verbose = 0;

  printf("[context:%x] func:%x modName:%s addr:%x\n",
    ctxt, ctxt->func, ctxt->modName, ctxt->addr);

  printf("  cline:%d asmline:%d block:%d level:%d\n",
    ctxt->cline, ctxt->asmline, ctxt->level);

  printf("[globals] currCtxt:%x, modules:%x, functions:%x symbols:%x\n",
    currCtxt, modules, functions, symbols);
  printf("  nStructs:%d, structs:%x, ssdirl:%s\n",
    nStructs, structs, ssdirl);

  /**************** modules *******************/
  {
    module *m;
    srcLine *cs, *as;
    int i, mi;
    printf("[modules]\n");
    m = setFirstItem(modules);
    mi = 0;
    for (;;) {
      if (m == NULL)
        break;
      printf("  %d) cfullname:%s, afullname:%s, name:%s\n", ++mi,
        m->cfullname, m->afullname, m->name);
      printf("    c_name:%s, asm_name:%s, ncLines:%d, nasmLines:%d\n",
              m->c_name, m->asm_name, m->ncLines, m->nasmLines);
      printf("    cLines:%x, asmLines:%x\n",
              m->cLines, m->asmLines);
      i = 0;
      if (m->cLines) {
        cs = m->cLines[i++];
        printf("    [cLines] ");
        while (cs) {
          if (our_verbose)
            printf("   (%d) addr:%x, block:%d, level:%d, src:%s\n",
               i, cs->addr, cs->block, cs->level, cs->src);
          cs = m->cLines[i++];
        }
        if (!our_verbose)
            printf("%d records", i);
      }
      i = 0;
      if (m->asmLines) {
        as = m->asmLines[i++];
        printf("    [asmLines] ");
        while (as) {
          if (our_verbose)
            printf("   (%d) addr:%x, block:%d, level:%d, src:%s\n",
               i, as->addr, as->block, as->level, as->src);
          as = m->asmLines[i++];
        }
        if (!our_verbose)
            printf("%d records", i);
      }
      printf("\n");

      m = setNextItem(modules);
    }
  }

  /**************** functions *******************/
  {
    function *f;
    int i;
    printf("[functions]\n");
    f = setFirstItem(functions);
    i = 0;
    for (;;) {
      if (f == NULL)
        break;
      if (our_verbose) {
        printf("  %d) sym:%x, modName:%s, mod:%x\n", i,
          f->sym, f->modName, f->mod);
        printf("    entryline:%d, aentryline:%d, exitline:%d, aexitline:%d\n",
                f->entryline, f->aentryline, f->exitline, f->aexitline);
        printf("    cfpoints:%x, afpoints:%x, laddr:%x, lline:%d\n",
                f->cfpoints, f->afpoints, f->laddr, f->lline);
      }
      ++i;
      f = setNextItem(functions);
    }
    if (!our_verbose)
      printf("   %d functions\n", i);
  }

  /**************** symbols *******************/
  {
    symbol *s;
    int i;
    printf("[symbols]\n");
    s = setFirstItem(symbols);
    i = 0;
    for (;;) {
      if (s == NULL)
        break;
      if (our_verbose) {
        printf("  %d) name:%s, size:%d, level:%d block:%d\n", i,
          s->name, s->size, s->level, s->block);
        printf("    isonstack:%d, isfunc:%d, offset:%d addr:%d\n",
          s->isonstack, s->isfunc, s->offset, s->addr);
        printf("    eaddr:%d, addr_type:%c, type:%x etype:%x\n",
          s->eaddr, s->addr_type, s->type, s->etype);
        printf("    scopetype:%c, sname:%s, rname:%s addrspace:%c\n",
          s->scopetype, s->sname, s->rname, s->addrspace);
        printf("    next:%x\n", s->next);
      }
      ++i;
      s = setNextItem(symbols);
    }
    if (!our_verbose)
      printf("   %d symbols\n", i);
  }

}

/*-----------------------------------------------------------------*/
/* infoRegisters - print register information                      */
/*-----------------------------------------------------------------*/
static void infoRegisters( int all, context *ctxt)
{
    static unsigned int regaddrs[] = {0x81,0x82,0x83,0xd0,0xe0,0xf0,0};
    unsigned long val;
    int i,j,*r;

    i   = simGetValue (0xd0,'I',1);
    fprintf(stdout,"PC  : 0x%04X  RegisterBank %d:\nR0-7:",ctxt->addr,(i>>3)&3);
    for ( j = 0; j < 8 ; j++ )
    {
        val = simGetValue (j ,'R',1);
        fprintf(stdout," 0x%02X",val);
    }
    fprintf(stdout,"\n");
    val = simGetValue (0xe0,'I',1);
    fprintf(stdout,"ACC : 0x%02X %d %c\n",val,val,(isprint(val) ? val : '.'));
    val = simGetValue (0xf0,'I',1);
    fprintf(stdout,"B   : 0x%02X %d %c\n",val,val,(isprint(val) ? val : '.'));
    val = simGetValue (0x82,'I',2);
    fprintf(stdout,"DPTR: 0x%04X %d\n",val,val);
    val = simGetValue (0x81,'I',1);
    fprintf(stdout,"SP  : 0x%02X\n",val);
    fprintf(stdout,"PSW : 0x%02X | CY : %c | AC : %c | OV : %c | P : %c\n",
            i,(i&0x80)?'1':'0',(i&0x40)?'1':'0',(i&4)?'1':'0',(i&1)?'1':'0');
    if ( all )
    {
        fprintf(stdout,"Special Function Registers:\n");
        r = regaddrs;
        for ( i = 0x80 ; i < 0x100 ; i++ )
        {
            symbol *sym = NULL;
            if ( *r && *r == i )
            {
                /* skip normal registers */
                r++ ;
                continue;
            }
            if (applyToSetFTrue(sfrsymbols,symWithAddr,i,'I',&sym))
            {
                val = simGetValue (sym->addr,sym->addrspace,sym->size);
                fprintf(stdout,"%s : 0x%02x",sym->name,val);
                if ( !(i & 0x07 ))
                {
                    for ( j = 0 ; j < 8 ; j++ )
                    {
                        sym = NULL;
                        if (applyToSetFTrue(sfrsymbols,symWithAddr,i+j,'J',&sym))
                        {
                            //val = simGetValue (sym->addr,sym->addrspace,sym->size);
                            fprintf(stdout," %s=%c",sym->name,(val&1)? '1':'0');
                        }
                        val >>= 1;
                    }
                }
                fprintf(stdout,"\n");
            }
        }
    }
}

/*-----------------------------------------------------------------*/
/* infoStack - print call stack information                        */
/*-----------------------------------------------------------------*/
static void infoStack(context *ctxt)
{
    function *func ;
    int i = 0 ;

    STACK_STARTWALK(callStack) ;
    while ((func = STACK_WALK(callStack))) {
    Dprintf(D_break, ("break: infoStack: %s %p (%p)\n",func->sym->name, w_callStack,p_callStack));

        fprintf(stdout,"#%d  0x%08x in %s () at %s:%d\n",i++,
                func->laddr,func->sym->name,
                func->mod->c_name,func->lline+1);
    }
    if ( !i )
        fprintf(stdout,"no stack.\n");
}

/*-----------------------------------------------------------------*/
/* cmdWhere -  where command                                       */
/*-----------------------------------------------------------------*/
int cmdWhere(char *s, context *cctxt)
{
        infoStack(cctxt);
        return 0;
}


static int infomode = 0;
/*-----------------------------------------------------------------*/
/* cmdInfo - info command                                          */
/*-----------------------------------------------------------------*/
int cmdInfo (char *s, context *cctxt)
{
    while (isspace(*s)) s++;

    /* list all break points */
    if (strncmp(s,"break",5) == 0) {
        listUSERbp();
        return 0;
    }

    /* info frame same as frame */
    if (strcmp(s,"frame") == 0) {
        cmdFrame (s,cctxt);
        return 0;
    }

    if (strncmp(s,"line",4) == 0) {
    infomode=1;
        cmdListSrc (s+4,cctxt);
        return 0;
    }
    if (strncmp(s,"source",6) == 0) 
    {
        module *m;
        if ( s[6] == 's' )
        {
            int k = 0;
            fprintf(stdout,"Source files for which symbols have been read in:\n\n");
            for (m = setFirstItem(modules); m ; m = setNextItem(modules))
            {
                fprintf(stdout,"%s%s, %s",k ? ", ":"",m->cfullname, m->afullname); 
                k = 1;
            }
            fprintf(stdout,"\n"); 
        }
        else
        {
            if (!cctxt || !cctxt->func || !cctxt->func->mod) 
            {
                fprintf(stdout,"No source file loaded\n");
                return 0;
            }
            m = cctxt->func->mod;
            fprintf(stdout,"Current source file is %s\n",m->c_name);
            fprintf(stdout,"Located in %s\n",m->cfullname);
            fprintf(stdout,"Contains %d lines.\nSource language is c.\n",
                    m->ncLines);
        }
        return 0;
    }
    if (strncmp(s,"functions",7) == 0) 
    {
        function *f;
        module *m = NULL;
        fprintf(stdout,"All defined functions:\n");
        for ( f = setFirstItem(functions); f ; f = setNextItem(functions))
        {
            if ( f->mod != m )
            {
                m = f->mod;
                fprintf(stdout,"\nFile %s\n", m->c_name);
            }
            fprintf(stdout,"%s();\n",f->sym->name);
        }
        return 0;
    }
    /* info stack display call stack */
    if (strcmp(s,"stack") == 0) {
        infoStack(cctxt);
    showfull = 1;
        return 0;
    }

    /* info stack display call stack */
    if (strcmp(s,"registers") == 0) {
        infoRegisters(0,cctxt);
            return 0;
    }

    /* info stack display call stack */
    if (strcmp(s,"all-registers") == 0) 
    {
        infoRegisters(1,cctxt);
        return 0;
    }

    /* info stack display call stack */
    if (strcmp(s,"symbols") == 0) {
      /* dump out symbols we have read in */
      fprintf(stdout,"Dumping symbols...\n");
      infoSymbols(cctxt);
      return 0;
    }

    if (strcmp(s,"variables") == 0) {
      /* dump out symbols we have read in */
      fprintf(stdout,"Dumping symbols...\n");
      infoSymbols(cctxt);
      return 0;
    }

    fprintf(stdout,"Undefined info command: \"%s\".  Try \"help\n",s);
    return 0;

}

/*-----------------------------------------------------------------*/
/* cmdQuit  - quit debugging                                       */
/*-----------------------------------------------------------------*/
int cmdQuit (char *s, context *cctxt)
{   
    if (simactive)
        closeSimulator();
    return 1;
}

/*-----------------------------------------------------------------*/
/* cmdListSrc  - list src                                          */
/*-----------------------------------------------------------------*/
int cmdListSrc (char *s, context *cctxt)
{   
    static int currline = 0;
    int i =0 ;
    int pline = 0;
    int llines = listlines;
    function *func = NULL;


    while (*s && isspace(*s)) s++;
    
    /* if the user has spcified line numer then the line number
       can be of the following formats
       LINE          - just line number
       FILE:LINE     - filename line number
       FILE:LINE,LASTLINE  + last line
       FUNCTION      - list a function
       FILE:FUNCTION - function in file */

    if (*s) {
        /* case a) LINE */
        if (isdigit(*s)) {
            if (!cctxt || !cctxt->func || !cctxt->func->mod) {
              if (!list_mod) {
                fprintf(stdout,"Sdcdb fails to have a proper context at %d.\n", __LINE__);
                return 0;
              }
            }
            else
              list_mod = cctxt->func->mod;
        pline = strtol(s,&s,10) - 1;
        if (s && (s = strchr(s,','))) 
        {
            /* LINE,LASTLINE */
            llines = strtol(s+1,0,10); 
            if ( llines > 0 )
                llines -= pline+1;
            else
                llines = listlines;
        }
        }
        else {
            char *bp;
            
            /* if ':' present then FILE:LINE || FILE:FUNCTION */
            if ((bp = strchr(s,':'))) {
                *bp = '\0';
                bp ++;
                if (isdigit(*bp)) {
                    /* FILE:LINE */
                    list_mod=NULL;  /* bug fix 2-09-02, moduleWithCName expects mod to be null */
                    if (srcMode == SRC_CMODE) {
                        if (!applyToSet(modules,moduleWithCName,s,&list_mod)) {
                            fprintf (stderr,"No c source file named %s.\n",s);
                            return 0;
                        }
                    } else {
                        if (!applyToSet(modules,moduleWithAsmName,s,&list_mod)) {
                            fprintf (stderr,"No source file named %s.\n",s);
                            return 0;
                        }
                    }
                    pline = strtol(bp,&bp,10) - 1;
            if (bp && (bp = strchr(bp,','))) 
            {
                /* FILE:LINE,LASTLINE */
                llines = strtol(bp+1,0,10); 
                if ( llines > 0 )
                    llines -= pline+1;
                else
                    llines = listlines;
            }
                } else {
                    /* FILE:FUCTION */
                    if (!applyToSet(functions,funcWithNameModule,bp,s,&func)) {
                        fprintf(stdout,"Function \"%s\" not defined.\n",bp);
                        return 0;
                    }
                    list_mod = func->mod;
                    if (srcMode == SRC_CMODE) {
                        pline = func->entryline;
                        llines = func->exitline - func->entryline + 1;
                    } else {
                        pline = func->aentryline;
                        llines = func->aexitline - func->aentryline + 1;
                    }
                }
            }
            else {
                /* FUNCTION */
            if (*s == '\'') 
            {
                /* 'FUNCTION' */
                s++ ;
                if ((bp = strrchr(s,'\''))) 
                {
                    *bp = '\0';
                }
                
            }
                if (!applyToSet(functions,funcWithName,s,&func)) {
                    fprintf(stderr,"Function \"%s\" not defined.\n",s); 
                    return 0;
                }
                else {
                    list_mod = func->mod;
                    if (srcMode == SRC_CMODE) {
                        pline = func->entryline;
                        llines = func->exitline - func->entryline + 1; 
                    } else {
                        pline = func->aentryline;
                        llines = func->aexitline - func->aentryline + 1; 
                    }
                }
            }
        }
    } else {
        /* if no line specified & we had listed
           before then continue from that listing */
        if (currline)
            pline = currline ;
        else {
            if (!cctxt || !cctxt->func || !cctxt->func->mod) {
              fprintf(stdout,"Missing context at %d. Try list filename:lineno\n", __LINE__);
              return 0;
            }
            list_mod = cctxt->func->mod;
            if (srcMode == SRC_CMODE)
                pline = cctxt->cline;
            else
                pline = cctxt->asmline;
        }
    }

    if (!list_mod) {
      fprintf(stdout,"Sdcdb fails to have a valid module context at %d.\n", __LINE__);
      return 0;
    }

    if ( pline < 0 )
        return 0;
    if ( infomode )
    {
        int firstaddr , lastaddr ;
            if ( pline  >= list_mod->ncLines )
            pline = cctxt->cline;
        firstaddr = lastaddr = list_mod->cLines[pline]->addr;
        if (!func && cctxt && cctxt->func )
            func = cctxt->func;
            fprintf(stdout,"Line %d of \"%s\" starts at address 0x%08x <%s+%d>", 
                pline+1,
                list_mod->c_name, lastaddr,
                func ? func->sym->name : "?",
                func ? lastaddr -func->sym->addr : 0);
        llines = pline +1;
        while ( pline < list_mod->ncLines )
        {
            pline++;
            if ( list_mod->cLines[pline]->addr > lastaddr )
            {
                lastaddr = list_mod->cLines[pline]->addr -1;
                break;
            }
        }
        fprintf(stdout," and ends at 0x%08x <%s+%d>.\n", 
                lastaddr,
                func ? func->sym->name : "?",
                func ? lastaddr -func->sym->addr : 0);
        infomode=0;
        if ( func )
            fprintf(stdout,"\032\032%s:%d:1:beg:0x%08x\n",
                    func->mod->cfullname,
                    llines,firstaddr);
        else
            showfull=1;
        return 0;
    }
    for ( i = 0 ; i < llines ; i++ ) {
        if (srcMode == SRC_CMODE) {
            if ( (pline + i) >= list_mod->ncLines )
                break;
            fprintf(stdout,"%d\t%s",pline + i,
                    list_mod->cLines[pline +i]->src);
        } else {
            if ( (pline + i) >= list_mod->nasmLines )
                break;
            fprintf(stdout,"%d\t%s",pline + i,
                    list_mod->asmLines[pline +i]->src);
        }
    }
    currline = pline + i ;
    return 0;
}

static unsigned long getValBasic(symbol *sym, link *type, char *val)
{
    char *s;
    union 
    {   
        float f;     
        unsigned long val;
        long         sval;
        struct {
            unsigned short    lo;
            unsigned short    hi;
        } i;
        unsigned char b[4];
    }v;

    if (IS_FLOAT(type))         
        v.f = strtof(val,NULL);    
    else
        if (IS_PTR(type))
            v.val = strtol(val,NULL,0);
        else
    {
            if (IS_INTEGRAL(type)) 
        {
            link *etype;
            if ( type->next )
                etype = type->next;
            else
                etype = type;
            if (IS_CHAR(etype))
            {
                if (( s = strchr(val,'\'')))
                {
                    if ( s[1] == '\\' )
                        v.b[0] = strtol(s+2,NULL,8);
                    else 
                        v.b[0] = s[1];
                }
                else
                {
                    v.b[0] = strtol(val,NULL,0);
                }
            }
            else
                if (IS_INT(etype)) 
                    if (IS_LONG(etype))
                        v.val = strtol(val,NULL,0);
                    else
                        v.i.lo = strtol(val,NULL,0);
                else
                    v.val = strtol(val,NULL,0);
            } 
        else
            v.val = strtol(val,NULL,0);
    }
    return v.val;
}

/*-----------------------------------------------------------------*/
/* printFmtInteger - print value in bin,oct,dez or hex             */
/*-----------------------------------------------------------------*/
static void printFmtInteger(char *deffmt,int fmt, long val, 
                            int sign, int size)
{
    static char digits[] = 
    {
        '0' , '1' , '2' , '3' , '4' , '5' ,
        '6' , '7' , '8' , '9' , 'a' , 'b' ,
        'c' , 'd' , 'e' , 'f' , 'g' , 'h' 
    };
    static int radixOfFormat[] = { 0 , 2, 8 ,10, 16  };
    static int olenOfSize[]    = { 0 , 3, 6 , 8, 11  };
        char buf[40];
        char negative = 0;
        int charPos = 38;
    int radix;

    if ( fmt == FMT_NON || fmt == FMT_DEZ )
    {
        fprintf(stdout,deffmt,val);
        return;
    }
    radix = radixOfFormat[fmt];

    /*
    if ( sign && val < 0 )
        negative = 1;
    */

        if (!negative)
            val = -val;

        buf[39] = '\0';
    while (val <= -radix) 
    {
            buf[charPos--] = digits[-(val % radix)];
            val = val / radix;
        }
        buf[charPos] = digits[-val];

    switch ( fmt )
    {
        case FMT_OCT:
            radix = olenOfSize[size];
            break;
        case FMT_HEX:
            radix = size << 1;
            break;
        case FMT_BIN:
            radix = size << 3;
            break;
    }

    while (charPos > 39 - radix )
    {
        buf[--charPos] = '0';
    } 
    switch ( fmt )
    {
        case FMT_OCT:
            if ( buf[charPos] != '0' )
                buf[--charPos] = '0';
            break;
        case FMT_HEX:
            buf[--charPos] = 'x';
            buf[--charPos] = '0';
            break;
    }
        if (negative) {
            buf[--charPos] = '-';
        }
    fputs(&buf[charPos],stdout);
}

/*-----------------------------------------------------------------*/
/* printValBasic - print value of basic types                      */
/*-----------------------------------------------------------------*/
static void printValBasic(symbol *sym, link *type,
                          char mem, unsigned addr,int size, int fmt)
{
    union {     
        float f;     
        unsigned long val;
        long         sval;
        struct {
            unsigned short    lo;
            unsigned short    hi;
        } i;
        unsigned char b[4];
    }v;
    union {
        unsigned char b[4];
    }v1;
    
    v.val = simGetValue(addr,mem,size);
    /* if this a floating point number then */
    if (IS_FLOAT(type))         
        fprintf(stdout,"%f",v.f);    
    else
        if (IS_PTR(type))
            fprintf(stdout,"0x%*x",size<<1,v.val);
        else
        if (IS_INTEGRAL(type)) 
        {
            link *etype;
            if ( type->next )
                etype = type->next;
            else
                etype = type;
            if (IS_CHAR(etype))
            { 
                if ( isprint(v.val))
                    printFmtInteger((SPEC_USIGN(etype)?"0x%02x":"'%c'"),
                                    fmt,(long)v.val,0,size);
                else
                    printFmtInteger((SPEC_USIGN(etype)?"0x%02x":"'\\%o'"),
                                    fmt,(long)v.val,0,size);
            }
            else
            {
                if (IS_INT(etype)) 
                    if (IS_LONG(etype))
                        if (SPEC_USIGN(etype))
                            printFmtInteger("%u",fmt,(long)v.val,0,size);
                        else
                            printFmtInteger("%d",fmt,(long)v.sval,1,size);
                    else
                        if (SPEC_USIGN(etype))
                            printFmtInteger("%u",fmt,(long)v.i.lo,0,size);
                        else
                            printFmtInteger("%d",fmt,(long)v.i.lo,1,size);
                else
                {
                    if (IS_BITVAR(etype))
                        fprintf(stdout,"%c",(v.val?'1':'0'));
                    else
                        fprintf(stdout,"0x%0*x",size<<1,v.val);
                }
            }
            } else
            fprintf(stdout,"0x%0*x",size<<1,v.val);  
}

/*-----------------------------------------------------------------*/
/* printValFunc  - prints function values                          */
/*-----------------------------------------------------------------*/
static void printValFunc (symbol *sym, int fmt)
{
    fprintf(stdout,"print function not yet implemented");
}

/*-----------------------------------------------------------------*/
/* printArrayValue - will print the values of array elements       */
/*-----------------------------------------------------------------*/
static void printArrayValue (symbol *sym,  link *type,
                             char space, unsigned int addr, int fmt)
{
        link *elem_type = type->next;
        int i;
        
        fprintf(stdout,"{");
        for (i = 0 ; i < DCL_ELEM(type) ; i++) {                
                if (IS_AGGREGATE(elem_type)) {
                        printValAggregates(sym,elem_type,space,addr,fmt);                      
                } else {
                        printValBasic(sym,elem_type,space,addr,getSize(elem_type),fmt);
                }
                addr += getSize(elem_type);
                if (i != DCL_ELEM(type) -1)
                        fprintf(stdout,",");
        }

        fprintf(stdout,"}");            
}

/*-----------------------------------------------------------------*/
/* printStructValue - prints structures elements                   */
/*-----------------------------------------------------------------*/
static void printStructValue (symbol *sym, link *type, 
                              char space, unsigned int addr, int fmt) 
{
        symbol *fields = SPEC_STRUCT(type)->fields;
    int first = 1;
        fprintf(stdout," { ");
        while (fields) {
                fprintf(stdout,"%s%s = ",(first ? "": ", "),fields->name);
                first = 0;
        if (IS_AGGREGATE(fields->type)) {
                        printValAggregates(fields,fields->type,space, addr, fmt);
                } else {
                        printValBasic(fields,fields->type,space,addr,getSize(fields->type), fmt);
                }
                addr += getSize(fields->type);
                fields = fields->next;
        }
        fprintf(stdout,"}");
}

/*-----------------------------------------------------------------*/
/* printValAggregates - print value of aggregates                  */
/*-----------------------------------------------------------------*/
static void printValAggregates (symbol *sym, link *type,
                                char space,unsigned int addr, int fmt)
{

        if (IS_ARRAY(type)) {
                printArrayValue(sym, type, space, addr, fmt);
                return ;
        }

        if (IS_STRUCT(type)) { 
                printStructValue(sym, type, space, addr, fmt); 
                return; 
        } 
}

/*-----------------------------------------------------------------*/
/* printOrSetSymValue - print or set value of a symbol             */
/*-----------------------------------------------------------------*/
static int printOrSetSymValue (symbol *sym, context *cctxt, 
                                int flg, int dnum, int fmt, char *rs, 
                                char *val, char cmp )
{
    static char fmtChar[] = " todx ";
    static int stack = 1;
        symbol *fields;
    link *type;
    unsigned int  addr; 
    int size, n;
    char *s, *s2;
    char save_ch, save_ch2;

    /* if it is on stack then compute address & fall thru */
    if (sym->isonstack) 
    {
        symbol *bp = symLookup("bp",cctxt);
        if (!bp) 
        {
            fprintf(stdout,"cannot determine stack frame\n");
            return 1;
        }

        sym->addr = simGetValue(bp->addr,bp->addrspace,bp->size)
            + sym->offset ;      
    }
    
    /* get the value from the simulator and
       print it */
    switch (flg)
    {
        case 0: 
        default:
            break;
        case 1: 
            fprintf(stdout,"$%d = ",stack++);
            break;
        case 2: 
            fprintf(stdout,"%d: ", dnum);
            if ( fmt != FMT_NON )
                fprintf(stdout,"/%c ",fmtChar[fmt]);
            fprintf(stdout,"%s%s = ",sym->name,rs);
            break;
    }

    addr = sym->addr;
    type = sym->type;
    size = sym->size;

    while ( *rs )
    {
        if ( *rs == '[' && IS_ARRAY(type))
        {
            s = rs+1;
            while ( *rs && *rs != ']' ) rs++ ;
            save_ch = *rs;
            *rs = '\0' ;
            if ( ! isdigit(*s ))
            {
                /* index seems a variable */
                for ( s2 = s; *s2 && ( isalnum( *s2 ) || *s2 == '_'); s2++ );
                save_ch2 = *s2;
                if ( *s2 )
                    *s2 = '\0';
                fields = symLookup(s,cctxt);
                *s2 = save_ch2;
                if ( ! fields )
                {
                    fprintf(stdout,"Unknown variable \"%s\" for index.\n", s);
                    return 1;                    
                }
                /* arrays & structures first */
                if (! IS_INTEGRAL(fields->type))
                {
                    fprintf(stdout,"Wrong type of variable \"%s\" for index \n", s);
                    return 1;                    
                }
                n = simGetValue(fields->addr,fields->addrspace,getSize(fields->type));
            }
            else
            {
                n = strtol(s,0,0);
            }
            if ( n < 0 || n >= DCL_ELEM(type))
            {
                fprintf(stdout,"Wrong index %d.\n", n);
                return 1;                    
            }
            type = type->next;
            size = getSize(type);
            addr += size * n;
            *rs++ = save_ch;
        }
        else if ( *rs == '.' && IS_STRUCT(type))
        {
            s = rs+1;
            /* search structure element */
            for ( rs = s; *rs && ( isalnum( *rs ) || *rs == '_'); rs++ );
            save_ch = *rs;
            if ( *rs )
                *rs = '\0';
            for (fields = SPEC_STRUCT(type)->fields; fields; fields = fields->next) 
            {
                if (!(strcmp(s,fields->name)))
                    break;
            }
            *rs = save_ch;
            if ( ! fields )
            {
                fprintf(stdout,"Unknown field \"%s\" of structure\n", s);
                return 1;                    
            }
            type = fields->type;
            size = getSize(type);
            addr += fields->offset;
        }
        else
            break;
    }

    /* arrays & structures first */
    if (IS_AGGREGATE(type))
    {
            if ( val )
        {
            fprintf(stdout,"Cannot set/compare aggregate variable\n");
            return 1;
        }
        else
            printValAggregates(sym,type,sym->addrspace,addr,fmt);
    }
    else
        /* functions */
        if (IS_FUNC(type))
    {
            if ( !val )
            printValFunc(sym,fmt);
        else
            return 1;
    }
        else
    { 
            if ( val )
        {
            unsigned long newval;
            newval = getValBasic(sym,type,val);

            if ( cmp )
            {
                unsigned long lval;
                lval = simGetValue(addr,sym->addrspace,size);
                switch ( cmp )
                {
                    case '<' : return ( lval <  newval ? 1:0 ); break;
                    case '>' : return ( lval >  newval ? 1:0 ); break;
                    case 'l' : return ( lval <= newval ? 1:0 ); break;
                    case 'g' : return ( lval >= newval ? 1:0 ); break;
                    case '=' : return ( lval == newval ? 1:0 ); break;
                    case '!' : return ( lval != newval ? 1:0 ); break;
                }
            }
            else
            {
                simSetValue(addr,sym->addrspace,size,newval);   
                return 1;
            }
        }
        else
            printValBasic(sym,type,sym->addrspace,addr,size,fmt);
    }
    if ( flg > 0 ) fprintf(stdout,"\n");
        return 0;
}

/*-----------------------------------------------------------------*/
/* printStructInfo - print out structure information               */
/*-----------------------------------------------------------------*/
static void printStructInfo (structdef *sdef)
{
    symbol *field = sdef->fields ;
    int i = 0 ;
    
    while (field) {
        i += field->offset;
        field = field->next;
    }

    fprintf(stdout,"%s %s {\n",(i ? "struct" : "union" ), sdef->tag);
    field = sdef->fields;
    while (field) {
        printTypeInfo (field->type);
        fprintf(stdout," %s ;\n",field->name);
        field = field->next ;
    }

    fprintf(stdout,"}\n");

}

/*-----------------------------------------------------------------*/
/* printTypeInfo - print out the type information                  */
/*-----------------------------------------------------------------*/
static void printTypeInfo(link *p)
{
    if (!p)
        return ;

    if (IS_DECL(p)) {
        switch (DCL_TYPE(p))  {
        case FUNCTION:
            printTypeInfo (p->next);
            fprintf(stdout,"()");
            break;
        case ARRAY:
            printTypeInfo (p->next);
            fprintf(stdout,"[%d]",DCL_ELEM(p));
            break;
        
        case IPOINTER:
        case PPOINTER:
        case POINTER:
            printTypeInfo (p->next);
            fprintf(stdout,"(_near *)");
            break;

        case FPOINTER:
            printTypeInfo (p->next);
            fprintf(stdout,"(_xdata *)");
            break;

        case CPOINTER:
            printTypeInfo( p->next);
            fprintf(stdout,"(_code *)");
            break;
            
        case GPOINTER:
            printTypeInfo( p->next);
            fprintf(stdout,"(_generic *)");
            break;                   
        }
    } else {
        switch (SPEC_NOUN(p)) { /* depending on the specifier type */
        case V_INT:
            (IS_LONG(p) ? fputs("long ",stdout) : 
             ( IS_SHORT(p) ? fputs("short ",stdout) : 
               fputs("int ",stdout))) ;
            break;
        case V_FLOAT:
             fputs("float ",stdout);
             break;

        case V_CHAR:
            fputs ("char ",stdout);
            break;

        case V_VOID:
            fputs("void ",stdout);
            break;

        case V_STRUCT:
            printStructInfo (SPEC_STRUCT(p));
            break;

        case V_SBIT:
            fputs("sbit ",stdout);
            break;

        case V_BIT:
            fprintf(stdout,": %d" ,SPEC_BLEN(p));       
            break;
        }
    }
}

/*-----------------------------------------------------------------*/
/* conditionIsTrue - compare variable with constant value        */
/*-----------------------------------------------------------------*/
int conditionIsTrue( char *s, context *cctxt)
{   
    symbol *sym = NULL;
    int fmt;
    char *rs, *dup, cmp_char;
    dup = s = Safe_strdup(s);
    if ( !( rs = preparePrint(s, cctxt, &fmt, &sym )) || !sym)
        fmt = 1;
    else if (!( s =  strpbrk(rs,"<>=!")))
        fmt = 1;
    else
    {
        cmp_char = *s;    
        *s++ = '\0';
        if ( *s == '=' )
        {
            /* if <= or >= an other char is used 
             * == or !=  not checked in switch 
             */
            switch( cmp_char )
            {
                case '>': cmp_char = 'g' ; break;
                case '<': cmp_char = 'l' ; break;
            }
            s++ ;
        }
        while (isspace(*s)) *s++ = '\0';
        fmt = printOrSetSymValue(sym,cctxt,0,0,0,rs,s,cmp_char);
    }
    Safe_free(dup);
    return fmt;
}

/*-----------------------------------------------------------------*/
/* cmdPrint - print value of variable                              */
/*-----------------------------------------------------------------*/
int cmdPrint (char *s, context *cctxt)
{   
    symbol *sym ;
    int fmt;
    char *rs;
    if ( !( rs = preparePrint(s, cctxt, &fmt, &sym )))
        return 0;

    if ( sym ) 
    {
        printOrSetSymValue(sym,cctxt,1,0,fmt,rs,NULL,'\0');
    } 
    return 0;
}

/*-----------------------------------------------------------------*/
/* cmdOutput - print value of variable without number and newline  */
/*-----------------------------------------------------------------*/
int cmdOutput (char *s, context *cctxt)
{   
    symbol *sym ;
    int fmt;
    char *rs;
    if ( !( rs = preparePrint(s, cctxt, &fmt, &sym )))
        return 0;

    if ( sym ) 
    {
        printOrSetSymValue(sym,cctxt,0,0,fmt,rs,NULL,'\0');
    } 
    return 0;
}

/** find display entry with this number */

DEFSETFUNC(dsymWithNumber)
{
    dsymbol *dsym = item;
    V_ARG(int , dnum);
    V_ARG(dsymbol **,dsymp);

    if ( dsym->dnum == dnum )
    {
        *dsymp = dsym;
        return 1;
    }
    return 0;
}

/*-----------------------------------------------------------------*/
/* displayAll  - display all valid variables                       */
/*-----------------------------------------------------------------*/
void displayAll(context *cctxt)
{
    dsymbol *dsym;
    symbol  *sym;
    if ( !dispsymbols )
        return;
    for (dsym = setFirstItem(dispsymbols);
         dsym ;
         dsym = setNextItem(dispsymbols)) 
    {
        if ( (sym = symLookup(dsym->name,cctxt)))
            printOrSetSymValue(sym,cctxt,2,dsym->dnum,dsym->fmt,
                               dsym->rs,NULL,'\0');
    }
}

/*-----------------------------------------------------------------*/
/* cmdDisplay  - display value of variable                         */
/*-----------------------------------------------------------------*/
int cmdDisplay (char *s, context *cctxt)
{   
    static int dnum = 1;
    symbol *sym ;
    int fmt;
    char *rs;
    if ( !( rs = preparePrint(s, cctxt, &fmt, &sym )))
    {
        displayAll(cctxt);
        return 0;
    }

    if ( sym ) 
    {
        dsymbol *dsym = (dsymbol *)Safe_calloc(1,sizeof(dsymbol));
        dsym->dnum = dnum++ ;
        dsym->name = sym->name;
        dsym->fmt  = fmt;
        dsym->rs   = gc_strdup(rs);
        addSetHead(&dispsymbols,dsym);
    }
    return 0;
}

/*-----------------------------------------------------------------*/
/* cmdUnDisplay  - undisplay value of variable                              */
/*-----------------------------------------------------------------*/
int cmdUnDisplay (char *s, context *cctxt)
{   
    dsymbol *dsym;
    int dnum;

    while (isspace(*s)) s++;
    if (!*s)
    {
        for (dsym = setFirstItem(dispsymbols);
             dsym;
             dsym = setNextItem(dispsymbols))
        {
            Safe_free(dsym->rs);
            Safe_free(dsym); 
        }
        deleteSet(&dispsymbols);
        return 0;
    }
    while ( s && *s )
    {
        dnum = strtol(s,&s,10);
        if (applyToSetFTrue(dispsymbols,dsymWithNumber,dnum,&dsym)) 
        {
            deleteSetItem(&dispsymbols,dsym);
            Safe_free(dsym->rs);
            Safe_free(dsym); 
        } 
        else
        {
            fprintf(stdout,"Arguments must be display numbers.\n");    
        }
    }
    return 0;
}

/*-----------------------------------------------------------------*/
/* cmdPrintType - print type of a variable                         */
/*-----------------------------------------------------------------*/
int cmdPrintType (char *s, context *cctxt)
{   
        symbol *sym ;
    char *bp = s+strlen(s) -1;

    while (isspace(*s)) s++;
    if (!*s) return 0;
    while (isspace(*bp)) bp--;
    bp++ ;
    *bp = '\0';

    if ((sym = symLookup(s,cctxt))) {
        printTypeInfo(sym->type);
        fprintf(stdout,"\n");
    } else {
        fprintf(stdout,
                "No symbol \"%s\" in current context.\n",
                s);
    }
    return 0;   
}

/*-----------------------------------------------------------------*/
/* cmdClrUserBp - clear user break point                           */
/*-----------------------------------------------------------------*/
int cmdClrUserBp (char *s, context *cctxt)
{   
    char *bp ;    
    function *func = NULL;
        
    /* clear break point location specification can be of the following
       forms
       a) <nothing>        - break point at current location
       b) lineno           - number of the current module
       c) filename:lineno  - line number of the given file
       e) filename:function- function X in file Y (useful for static functions)
       f) function         - function entry point
    */

    if (!cctxt) {
        fprintf(stdout,"No symbol table is loaded.  Use the \"file\" command.\n");
        return 0;
    }

    /* white space skip */
    while (*s && isspace(*s)) s++;
    
    /* null terminate it after stripping trailing blanks*/
    bp = s + strlen(s);
    while (bp != s && isspace(*bp)) bp--;
    *bp = '\0';

    /* case a) nothing */
    /* if nothing given then current location : we know
       the current execution location from the currentContext */
    if (! *s ) {

        /* if current context is known */
        if (cctxt->func) 
            /* clear the break point @ current location */
            clearUSERbp (cctxt->addr);
        else
            fprintf(stderr,"No default breakpoint address now.\n");
                        
        goto ret ;
    }

    /* case b) lineno */
    /* check if line number */
    if (isdigit(*s)) {
        /* get the lineno */
        int line = atoi(s);

        /* if current context not present then we must get the module
           which has main & set the break point @ line number provided
           of that module : if current context known then set the bp 
           at the line number given for the current module 
        */
        if (cctxt->func) {
            if (!cctxt->func->mod) {
                if (!applyToSet(functions,funcWithName,"main"))
                    fprintf(stderr,"Function \"main\" not defined.\n");
                else 
                    clearBPatModLine(func->mod,line);
            } else 
                clearBPatModLine(cctxt->func->mod,line);                        
        }
        
        goto ret;
    }

    if ((bp = strchr(s,':'))) {
        
        module *mod = NULL;
        *bp = '\0';
        
        if (!applyToSet(modules,moduleWithCName,s,&mod)) {
            fprintf (stderr,"No source file named %s.\n",s);
            goto ret;
        }

        /* case c) filename:lineno */
        if (isdigit(*(bp +1))) {                    
         
            clearBPatModLine (mod,atoi(bp+1));      
            goto ret;
            
        }
        /* case d) filename:function */
        if (!applyToSet(functions,funcWithNameModule,bp+1,s,&func)) 
            fprintf(stderr,"Function \"%s\" not defined.\n",bp+1); 
        else
            clearBPatModLine (mod,func->entryline);
        
        goto ret;
    }
            
    /* case e) function */
    if (!applyToSet(functions,funcWithName,s,&func))
        fprintf(stderr,"Function \"%s\" not defined.\n",s); 
    else
        clearBPatModLine(func->mod,func->entryline);

 ret:    
    return 0;        
}

/*-----------------------------------------------------------------*/
/* cmdSimulator - send command to simulator                        */
/*-----------------------------------------------------------------*/
int cmdSimulator (char *s, context *cctxt)
{   
  char tmpstr[82];

    if (strlen(s) > 80) {
      printf("error 3A\n");
      exit(1);
    }
    strcpy(tmpstr, s);
    strcat(tmpstr, "\n");
    sendSim(tmpstr);
    waitForSim(200,NULL);
    fprintf(stdout,"%s",simResponse());
    return 0;
}

void setMainContext()
{
    function *func = NULL;
    currentFrame = 0; 
    if (!applyToSet(functions,funcWithName,"main",&func) &&
        !applyToSet(functions,funcWithName,"_main",&func))
        return;

    discoverContext (func->sym->addr, func);
}
    
static void printFrame()
{
    int i;
    function *func     = NULL;
    function *lastfunc = NULL;

    if ( currentFrame < 0 )
    {
        currentFrame = 0;
        fprintf(stdout,"Bottom (i.e., innermost) frame selected; you cannot go down.\n");
        return;
    }
    STACK_STARTWALK(callStack) ;
    for ( i = 0; i <= currentFrame ; i++ )
    {
        func = STACK_WALK(callStack);
        if ( !func )
        {
            currentFrame = i-1;
            fprintf(stdout,"Initial frame selected; you cannot go up.\n");
            return;
        }
    }
    fprintf(stdout,"#%d  0x%08x in %s () at %s:%d\n",
            currentFrame,func->laddr,func->sym->name,func->mod->c_name,func->lline+1);
    fprintf(stdout,"\032\032%s:%d:1:beg:0x%08x\n",
            func->mod->cfullname,func->lline+1,func->laddr);

    discoverContext (func->laddr, func);
}


/*-----------------------------------------------------------------*/
/* cmdUp -  Up command                                             */
/*-----------------------------------------------------------------*/
int cmdUp(char *s, context *cctxt)
{
    while (isspace(*s)) s++;
    if ( *s )
        currentFrame += strtol(s,0,10);
    else
        currentFrame++ ;

    printFrame();
        return 0;
}

/*-----------------------------------------------------------------*/
/* cmdDown - down command                                          */
/*-----------------------------------------------------------------*/
int cmdDown(char *s, context *cctxt)
{
    while (isspace(*s)) s++;
    if ( *s )
        currentFrame -= strtol(s,0,10);
    else
        currentFrame-- ;

    printFrame();
        return 0;
}
/*-----------------------------------------------------------------*/
/* cmdFrame - Frame command                                        */
/*-----------------------------------------------------------------*/
int cmdFrame (char *s, context *cctxt)
{   
    function *func = NULL;
    int i, framenr = 0;

    while (isspace(*s)) s++;
    if ( *s )
        currentFrame = strtol(s,0,10);
    printFrame();
    return 0;
}

/*-----------------------------------------------------------------*/
/* cmdFinish - exec till end of current function                   */
/*-----------------------------------------------------------------*/
int cmdFinish (char *s, context *ctxt)
{
    if (STACK_EMPTY(callStack)) {
        fprintf(stdout,"The program is not running.\n");
        return 0;
    }

    if (srcMode == SRC_CMODE) {
        setBreakPoint (ctxt->func->sym->eaddr, CODE, STEP, 
                       stepBpCB, ctxt->func->mod->c_name, 
                       ctxt->func->exitline);
    } else {
        setBreakPoint (ctxt->func->sym->eaddr, CODE, STEP, 
                       stepBpCB, ctxt->func->mod->asm_name, 
                       ctxt->func->aexitline);
    }

    simGo(-1);
    showfull = 1;
    return 0;
    
}


/*-----------------------------------------------------------------*/
/* cmdShow - show command                                          */
/*-----------------------------------------------------------------*/
int cmdShow (char *s, context *cctxt)
{
    /* skip white space */
    while (*s && isspace(*s)) s++ ;

    if (strcmp(s,"copying") == 0) {
        fputs(copying,stdout);
        return 0;
    }
    
    if (strcmp(s,"warranty") == 0) {
        fputs(warranty,stdout);
        return 0;
    }

    return 0;
}