[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"
"patents.  We wish to avoid the danger that redistributors of a free\n"
"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"
"under the terms of this General Public License.  The \"Program\", below,\n"
"refers to any such program or work, and a \"work based on the Program\"\n"
"means either the Program or any derivative work under copyright law:\n"
"that is to say, a work containing the Program or a portion of it,\n"
"either verbatim or with modifications and/or translated into another\n"
"language.  (Hereinafter, translation is included without limitation in\n"
"the term \"modification\".)  Each licensee is addressed as \"you\".\n"
"\n"
"Activities other than copying, distribution and modification are not\n"
"covered by this License; they are outside its scope.  The act of\n"
"running the Program is not restricted, and the output from the Program\n"
"is covered only if its contents constitute a work based on the\n"
"Program (independent of having been made by running the Program).\n"
"Whether that is true depends on what the Program does.\n"
"\n"
"  1. You may copy and distribute verbatim copies of the Program's\n"
"source code as you receive it, in any medium, provided that you\n"
"conspicuously and appropriately publish on each copy an appropriate\n"
"copyright notice and disclaimer of warranty; keep intact all the\n"
"notices that refer to this License and to the absence of any warranty;\n"
"and give any other recipients of the Program a copy of this License\n"
"along with the Program.\n"
"\n"
"You may charge a fee for the physical act of transferring a copy, and\n"
"you may at your option offer warranty protection in exchange for a fee.\n"
"\n"
"  2. You may modify your copy or copies of the Program or any portion\n"
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"above, provided that you also meet all of these conditions:\n"
"\n"
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"\n"
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"    part thereof, to be licensed as a whole at no charge to all third\n"
"    parties under the terms of this License.\n"
"\n"
"    c) If the modified program normally reads commands interactively\n"
"    when run, you must cause it, when started running for such\n"
"    interactive use in the most ordinary way, to print or display an\n"
"    announcement including an appropriate copyright notice and a\n"
"    notice that there is no warranty (or else, saying that you provide\n"
"    a warranty) and that users may redistribute the program under\n"
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"    License.  (Exception: if the Program itself is interactive but\n"
"    does not normally print such an announcement, your work based on\n"
"    the Program is not required to print an announcement.)\n"
"\n"
"These requirements apply to the modified work as a whole.  If\n"
"identifiable sections of that work are not derived from the Program,\n"
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"themselves, then this License, and its terms, do not apply to those\n"
"sections when you distribute them as separate works.  But when you\n"
"distribute the same sections as part of a whole which is a work based\n"
"on the Program, the distribution of the whole must be on the terms of\n"
"this License, whose permissions for other licensees extend to the\n"
"entire whole, and thus to each and every part regardless of who wrote it.\n"
"\n"
"Thus, it is not the intent of this section to claim rights or contest\n"
"your rights to work written entirely by you; rather, the intent is to\n"
"exercise the right to control the distribution of derivative or\n"
"collective works based on the Program.\n"
"\n"
"In addition, mere aggregation of another work not based on the Program\n"
"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"
"\n"
"  3. You may copy and distribute the Program (or a work based on it,\n"
"under Section 2) in object code or executable form under the terms of\n"
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"\n"
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"\n"
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"    machine-readable copy of the corresponding source code, to be\n"
"    distributed under the terms of Sections 1 and 2 above on a medium\n"
"    customarily used for software interchange; or,\n"
"\n"
"    c) Accompany it with the information you received as to the offer\n"
"    to distribute corresponding source code.  (This alternative is\n"
"    allowed only for noncommercial distribution and only if you\n"
"    received the program in object code or executable form with such\n"
"    an offer, in accord with Subsection b above.)\n"
"\n"
"The source code for a work means the preferred form of the work for\n"
"making modifications to it.  For an executable work, complete source\n"
"code means all the source code for all modules it contains, plus any\n"
"associated interface definition files, plus the scripts used to\n"
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"special exception, the source code distributed need not include\n"
"anything that is normally distributed (in either source or binary\n"
"form) with the major components (compiler, kernel, and so on) of the\n"
"operating system on which the executable runs, unless that component\n"
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"\n"
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"access to copy the source code from the same place counts as\n"
"distribution of the source code, even though third parties are not\n"
"compelled to copy the source along with the object code.\n"
"^L\n"
"  4. You may not copy, modify, sublicense, or distribute the Program\n"
"except as expressly provided under this License.  Any attempt\n"
"otherwise to copy, modify, sublicense or distribute the Program is\n"
"void, and will automatically terminate your rights under this License.\n"
"However, parties who have received copies, or rights, from you under\n"
"this License will not have their licenses terminated so long as such\n"
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"\n"
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"prohibited by law if you do not accept this License.  Therefore, by\n"
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"Program), you indicate your acceptance of this License to do so, and\n"
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"\n"
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"\n"
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"\n"
"If any portion of this section is held invalid or unenforceable under\n"
"any particular circumstance, the balance of the section is intended to\n"
"apply and the section as a whole is intended to apply in other\n"
"circumstances.\n"
"\n"
"It is not the purpose of this section to induce you to infringe any\n"
"patents or other property right claims or to contest validity of any\n"
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"integrity of the free software distribution system, which is\n"
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"through that system in reliance on consistent application of that\n"
"system; it is up to the author/donor to decide if he or she is willing\n"
"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"
"to ask for permission.  For software which is copyrighted by the Free\n"
"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 ;
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 ( line < 0 )
        return;

    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 != INT_MAX) {
                setBreakPoint (mod->cLines[next_line]->addr, CODE, bpType,
                               userBpCB, mod->c_name, next_line);
                return;
//              break;
            }
        }
        else {
           if (mod->asmLines[next_line]->addr != INT_MAX) {
               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, "addr 0x%x in no module/function (runtime env?)\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 = -1;
    }
    /* 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;
    }
    if ( gaddr == 0 )
    {
        function *func = NULL;;
        if (applyToSet(functions,funcInAddr,gaddr,&func))
            STACK_PUSH(callStack,func);
    }
    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);

    /* 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  set variable,         */
/*                output, print and display                        */
/*-----------------------------------------------------------------*/
static char *preparePrint(char *s, context *cctxt, int *fmt, symbol **sym)
{
    char *bp;
    char save_ch ;

    *fmt = FMT_NON;
    *sym = NULL;

    s = trim(s);
    if (!*s)
        return (char *)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++;
        s = trim_left(s);
    }
    for ( bp = s; *bp && ( isalnum( *bp ) || *bp == '_' || *bp == '$'); bp++ );
    save_ch = *bp;
    if ( *bp )
        *bp = '\0';

    if ( *s )
        *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, unsigned saddr, unsigned eaddr)
{
    int i,j,delta;
    unsigned symaddr;
    unsigned 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 )
    {
        s = trim_left(s);

        if ( isdigit(*s))
        {
            saddr = strtol(s,&s,0);
            if ( args > 1 )
            {
                s = trim_left(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%08lx to 0x%08lx:\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");
    if( saddr >= 0 )
    {
        char lbuf[64];
        sprintf(lbuf,"dis 0x%lx 0 %ld\n",saddr,( eaddr == -1 )?1L:eaddr-saddr);
        sendSim(lbuf);
        waitForSim(1000, NULL);
        fputs(simResponse(),stdout);
    }
    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;
    }
    /* trim left and right */
    s = trim(s);

    /* 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) {
        Dprintf(D_break, ("commonSetUserBp: a) cctxtaddr:%x \n",cctxt->addr));
            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%08lx not exists in code.\n",braddr);
            }
            else
            {
                Dprintf(D_break, ("commonSetUserBp: g) addr:%lx \n",braddr));
                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 ( !strchr(s,':') && isdigit(*s)) {
        /* get the lineno */
        int line = atoi(s) -1;
    Dprintf(D_break, ("commonSetUserBp: b) line:%d \n",line));
    if ( line < 0 )
    {
                fprintf(stdout,"linenumber <= 0\n");
        goto ret;
    }
        /* 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))) {
        Dprintf(D_break, ("commonSetUserBp: c) line:%d \n",atoi(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
        Dprintf(D_break, ("commonSetUserBp: d) \n"));
            setBPatModLine (mod,
                            (srcMode == SRC_CMODE ?
                             func->entryline :
                             func->aentryline),bpType);

        goto ret;
    }

    /* case e) function */
    Dprintf(D_break, ("commonSetUserBp: e) \n"));
    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;
    }

    /* trim left and right */
    s = trim(s);

    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 ( cctxt->addr != INT_MAX )
        {
            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)
{
    s = trim_left(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';
        s = trim_left(s);
        if (*s && sym)
        {
            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 ;
    s = trim_left(s);
    if (!*s )
    {
        fprintf(stdout,"Argument required (breakpoint number).\n");
        return 0;
    }
    bpnum = strtol(s,&s,10);
    s = trim_left(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 ;
    s = trim_left(s);
    if (!*s )
    {
        fprintf(stdout,"Argument required (breakpoint number).\n");
        return 0;
    }
    bpnum = strtol(s,&s,10);
    s = trim_left(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;
    s = trim_left(s);

    if (!*s )
        bpnum = getLastBreakptNumber();
    else
        bpnum = strtol(s,0,10);

    cmds = NULL;
    while ((line = getNextCmdLine()))
    {
        line = trim_left(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 ;
    s = trim_left(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 (0 /*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:%p etype:%p\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:%p\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;
    while (f != NULL) {
      if (our_verbose) {
        printf("  %d) sym:%p, fname:%s, modName:%s, mod:%p\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:%p, afpoints:%p, laddr:%x, lline:%d\n",
                f->cfpoints, f->afpoints, f->laddr, f->lline);
      }
      else {
        printf("<%s>", f->sym->name);
      }
      ++i;
      f = setNextItem(functions);
    }
    printf("   %d functions\n", i);
    return 0;
}

/*-----------------------------------------------------------------
 cmdListModules - list modules.
|-----------------------------------------------------------------*/
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:%p, asmLines:%p\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:%p] func:%p 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->block, ctxt->level);

  printf("[globals] currCtxt:%p, modules:%p, functions:%p symbols:%p\n",
    currCtxt, modules, functions, symbols);
  printf("  nStructs:%d, structs:%p, 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:%p, asmLines:%p\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:%p, modName:%s, mod:%p\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:%p, afpoints:%p, 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:%p etype:%p\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:%p\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 int regaddrs[] = {0x81,0x82,0x83,0xb8,0xd0,0xe0,0xf0,0};
    unsigned long val;
    int i,j,*r;

    i = simGetValue (0xd0,'I',1);
    fprintf(stdout,"IP  : 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%02lX",val);
    }
    fprintf(stdout,"\n");
    val = simGetValue (0xe0,'I',1);
    fprintf(stdout,"ACC : 0x%02lX %lu %c\n",val,val,(isprint(val) ? (char)val : '.'));
    val = simGetValue (0xf0,'I',1);
    fprintf(stdout,"B   : 0x%02lX %lu %c\n",val,val,(isprint(val) ? (char)val : '.'));
    val = simGetValue (0x82,'I',2);
    fprintf(stdout,"DPTR: 0x%04lX %lu\n",val,val);
    val = simGetValue (0x81,'I',1);
    fprintf(stdout,"SP  : 0x%02lX (0x%04lX)\n",val,simGetValue (val-1,'B',2));
    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%02lx",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)
{
    /* trim left and_right*/
    s = trim(s);

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

    /* info frame same as frame */
    if (strncmp(s,"frame",5) == 0) {
        cmdFrame (s+5,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 (strcmp(s,"functions") == 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;


    s = trim_left(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 )
    {
        unsigned 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;
        for ( ; 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 = strtod(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;

    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%*lx",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*lx",size<<1,v.val);
                }
            }
            } else
            fprintf(stdout,"0x%0*lx",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
            {
                if ( sym->addrspace == 'I' && addr == 0xb8 )
                {
                    /* Symbol with address of IP */
                    if ( cctxt ) cctxt->addr = newval;
                    simSetPC(cctxt->addr);
                }
                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++ ;
        }
        s = trim_left(s);
        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;

    s = trim_left(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 ;

    /* trim left and right */
    s = trim(s);
    if (!*s) return 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;
    }

    /* trim left and right */
    s = trim(s);

    /* 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);
}

function *needExtraMainFunction()
{
    function *func = NULL;
    if (!applyToSet(functions,funcWithName,"_main",&func))
    {
        if (applyToSet(functions,funcWithName,"main",&func))
        {
            return func;
        }
    }
    return NULL;
}

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)
{
    s = trim_left(s);
    if ( *s )
        currentFrame += strtol(s,0,10);
    else
        currentFrame++ ;

    printFrame();
        return 0;
}

/*-----------------------------------------------------------------*/
/* cmdDown - down command                                          */
/*-----------------------------------------------------------------*/
int cmdDown(char *s, context *cctxt)
{
    s = trim_left(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 framenr = 0;

    s = trim_left(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 */
    s = trim_left(s);

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

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

    return 0;
}