sdcc-3.9.0 fork implementing GNU assembler syntax

This fork aims to provide better support for stm8-binutils

1 files changed, 613 insertions, 0 deletions

diff --git a/debugger/mcs51/break.c b/debugger/mcs51/break.c
new file mode 100644
index 0000000..efec91e
--- /dev/null
+++ b/debugger/mcs51/break.c
@@ -0,0 +1,613 @@
+/*-------------------------------------------------------------------------
+  break.c - Source file for break point management
+        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"
+#undef DATADIR
+#include "symtab.h"
+#include "break.h"
+#include "cmd.h"
+#include "newalloc.h"
+
+hTab *bptable = NULL;
+char doingSteps    = 0;
+char userBpPresent = 0;
+
+/* call stack can be 1024 deep */
+STACK_DCL(callStack,function *,1024)
+
+#ifdef SDCDB_DEBUG
+char *debug_bp_type_strings[] =
+    {"ERR-0",
+     "DATA",
+    "CODE"    ,
+    "A_CODE"  ,
+    "USER"    ,
+    "STEP"    ,
+    "NEXT"    ,
+    "FENTRY"  ,
+    "FEXIT", "TMPUSER", ""};
+#endif
+
+static long bpnum = 0;
+
+long getLastBreakptNumber()
+{
+    return bpnum;
+}
+
+void resetHitCount()
+{
+    int k;
+    breakp *bp;
+    for ( bp = hTabFirstItem(bptable,&k); bp ;
+          bp = hTabNextItem(bptable,&k))
+    {
+        bp->hitCnt    = 0;
+        bp->ignoreCnt = 0;
+    }
+}
+
+/*-----------------------------------------------------------------*/
+/* setBreakPoint - creates an entry in the break point table       */
+/*-----------------------------------------------------------------*/
+int setBreakPoint (unsigned addr, char addrType, char bpType,
+        int (*callBack)(unsigned,breakp *,context *) ,
+        char *fileName, int lineno)
+{
+    breakp *bp, *bpl;
+
+    Dprintf(D_break, ("setBreakPoint: addr:%x atype:%s bpType:%s [%s:%d]\n",
+        addr,
+        debug_bp_type_strings[(int)addrType],
+        debug_bp_type_strings[(int)bpType],
+        fileName, lineno+1));
+
+    /* allocate & init a new bp */
+    bp = Safe_calloc(1,sizeof(breakp));
+    bp->addr = addr;
+    bp->addrType = addrType;
+    bp->bpType = bpType;
+    bp->callBack = callBack;
+    bp->bpnum = ((bpType == USER || bpType == TMPUSER)? ++bpnum : 0);
+    bp->filename = fileName;
+    bp->lineno = lineno;
+
+    /* if this is an user break point then
+       check if there already exists one for this address */
+    if (bpType == USER || bpType == TMPUSER)
+    {
+        for ( bpl = hTabFirstItemWK(bptable,addr) ; bpl;
+              bpl = hTabNextItemWK(bptable))
+        {
+
+            /* if also a user break point then issue Note : */
+            if (bpl->bpType == USER || bpType == TMPUSER)
+                fprintf(stderr,"Note: breakpoint %d also set at pc 0x%x\n",
+                        bpl->bpnum,bpl->addr);
+        }
+
+        fprintf(stderr,"Breakpoint %d at 0x%x: file %s, line %d.\n",
+                bp->bpnum, addr, fileName, lineno+1);
+
+        userBpPresent++;
+    }
+
+    if (bpType != STEP && bpType != NEXT)
+    {
+        /* if a break point does not already exist then
+           send command to simulator to add one */
+        if (!hTabSearch(bptable,addr))
+            /* send the break command to the simulator */
+            simSetBP (addr);
+    }
+
+    /* now add the break point to list */
+    hTabAddItem(&bptable,addr,bp);
+
+    return bp->bpnum ;
+}
+
+/*-----------------------------------------------------------------*/
+/* deleteSTEPbp - deletes all step break points                    */
+/*-----------------------------------------------------------------*/
+void deleteSTEPbp ()
+{
+    breakp *bp;
+    int k;
+
+    Dprintf(D_break, ("break: Deleting all STEP BPs\n"));
+    /* for break points delete if they are STEP */
+    for ( bp = hTabFirstItem(bptable,&k); bp ;
+          bp = hTabNextItem(bptable,&k))
+    {
+
+        /* if this is a step then delete */
+        if (bp->bpType == STEP)
+        {
+            hTabDeleteItem(&bptable,bp->addr,bp,DELETE_ITEM,NULL);
+            Safe_free(bp);
+        }
+    }
+
+}
+
+/*-----------------------------------------------------------------*/
+/* deleteNEXTbp - deletes all step break points                    */
+/*-----------------------------------------------------------------*/
+void deleteNEXTbp ()
+{
+    breakp *bp;
+    int k;
+
+    Dprintf(D_break, ("break: Deleting all NEXT BPs\n"));
+
+    /* for break points delete if they are NEXT */
+    for ( bp = hTabFirstItem(bptable,&k); bp ;
+          bp = hTabNextItem(bptable,&k))
+    {
+
+        /* if this is a step then delete */
+        if (bp->bpType == NEXT)
+        {
+            hTabDeleteItem(&bptable,bp->addr,bp,DELETE_ITEM,NULL);
+            Safe_free(bp);
+        }
+    }
+
+}
+
+static void freeUSERbp(breakp *bp)
+{
+    if ( bp->commands )
+        Safe_free(bp->commands);
+    if ( bp->condition )
+        Safe_free(bp->condition);
+    Safe_free(bp);
+}
+
+/*-----------------------------------------------------------------*/
+/* deleteUSERbp - deletes USER break point with number             */
+/*-----------------------------------------------------------------*/
+void deleteUSERbp (int bpnum)
+{
+    breakp *bp;
+    int k;
+
+    Dprintf(D_break, ("break: deleteUSERbp %d\n", bpnum));
+
+    /* for break points delete if they are STEP */
+    for ( bp = hTabFirstItem(bptable,&k); bp ;
+          bp = hTabNextItem(bptable,&k)) {
+
+        /* if this is a user then delete if break
+           point matches or bpnumber == -1 (meaning delete
+           all user break points */
+        if ((bp->bpType == USER || bp->bpType == TMPUSER )
+            && ( bp->bpnum == bpnum || bpnum == -1))
+        {
+            hTabDeleteItem(&bptable,bp->addr,bp,DELETE_ITEM,NULL);
+
+            /* if this leaves no other break points then
+               send command to simulator to delete bp from this addr */
+            if (hTabSearch(bptable,bp->addr) == NULL) {
+                simClearBP (bp->addr);
+                Dprintf(D_break, ("break: deleteUSERbp:simClearBP 0x%x\n", bp->addr));
+
+            }
+            fprintf(stdout,"Deleted breakpoint %d\n",bp->bpnum);
+            userBpPresent-- ;
+            freeUSERbp(bp);
+            if (bpnum == -1)
+                continue ;
+            else
+                break;
+        }
+    }
+
+    if (!bp && bpnum != -1)
+        fprintf(stderr,"No breakpoint number %d.\n",bpnum);
+}
+
+/*-----------------------------------------------------------------*/
+/* setUserbpCommand - set commandstring for breakpoint             */
+/*-----------------------------------------------------------------*/
+void setUserbpCommand (int bpnum, char *cmds)
+{
+    breakp *bp;
+    int k;
+    Dprintf(D_break, ("break: setUserbpCommand %d: commands:\n%send\n",
+                      bpnum, cmds));
+
+    for ( bp = hTabFirstItem(bptable,&k); bp ;
+          bp = hTabNextItem(bptable,&k))
+    {
+        if ((bp->bpType == USER || bp->bpType == TMPUSER )
+            && ( bp->bpnum == bpnum ))
+        {
+            if ( bp->commands )
+                Safe_free(bp->commands);
+            bp->commands = cmds;
+            return;
+        }
+    }
+    fprintf(stderr,"No breakpoint number %d.\n",bpnum);
+}
+
+/*-----------------------------------------------------------------*/
+/* setUserbpCondition - set condition string for breakpoint        */
+/*-----------------------------------------------------------------*/
+void setUserbpCondition (int bpnum, char *cond)
+{
+    breakp *bp;
+    int k;
+    Dprintf(D_break, ("break: setUserbpCondition %d: condition:'%s'\n",
+                      bpnum, cond?cond:""));
+
+    for ( bp = hTabFirstItem(bptable,&k); bp ;
+          bp = hTabNextItem(bptable,&k))
+    {
+        if ((bp->bpType == USER || bp->bpType == TMPUSER )
+            && ( bp->bpnum == bpnum ))
+        {
+            if ( bp->condition )
+                Safe_free(bp->condition);
+            bp->condition = cond;
+            return;
+        }
+    }
+    fprintf(stderr,"No breakpoint number %d.\n",bpnum);
+}
+
+/*-----------------------------------------------------------------*/
+/* setUserbpIgnCount - set ignorecount for breakpoint              */
+/*-----------------------------------------------------------------*/
+void setUserbpIgnCount (int bpnum, int ignorecnt )
+{
+    breakp *bp;
+    int k;
+    Dprintf(D_break, ("break: setUserbpIgnCount %d: ignorecnt=%d\n",
+                      bpnum, ignorecnt));
+
+    for ( bp = hTabFirstItem(bptable,&k); bp ;
+          bp = hTabNextItem(bptable,&k))
+    {
+        if ((bp->bpType == USER || bp->bpType == TMPUSER )
+            && ( bp->bpnum == bpnum ))
+        {
+            bp->ignoreCnt = bp->hitCnt + ignorecnt;
+            return;
+        }
+    }
+    fprintf(stderr,"No breakpoint number %d.\n",bpnum);
+}
+
+/*-----------------------------------------------------------------*/
+/* listUSERbp - list all user break points                         */
+/*-----------------------------------------------------------------*/
+void listUSERbp ()
+{
+    breakp *bp;
+    int k, isuser;
+
+    /* if there are none then say so & return */
+    if (!userBpPresent) {
+        fprintf(stdout,"No breakpoints.\n");
+        return ;
+    }
+    fprintf(stdout,"Num Type           Disp Enb Address    What\n");
+    for ( bp = hTabFirstItem(bptable,&k) ; bp ;
+          bp = hTabNextItem(bptable,&k)) {
+
+        isuser = 0;
+        if (bp->bpType == USER ) {
+            fprintf(stdout,"%-3d breakpoint     keep y   0x%08x at %s:%d\n",
+                    bp->bpnum,bp->addr,
+                    bp->filename,bp->lineno+1);
+            isuser = 1;
+        }
+        else if (bp->bpType == TMPUSER ) {
+            fprintf(stdout,"%-3d breakpoint      del y   0x%08x at %s:%d\n",
+                    bp->bpnum,bp->addr,
+                    bp->filename,bp->lineno+1);
+            isuser = 1;
+        }
+        if ( ! isuser )
+            continue;
+        if ( bp->ignoreCnt > bp->hitCnt )
+            fprintf(stdout,"\tignore next %d hits\n",
+                    bp->ignoreCnt - bp->hitCnt );
+        if ( bp->condition )
+            fprintf(stdout,"\tstop only if %s\n",bp->condition );
+        if ( bp->hitCnt > 0 )
+            fprintf(stdout,"\tbreakpoint already hit %d time%s\n",
+                    bp->hitCnt,bp->hitCnt>1?"s":"" );
+
+
+    }
+}
+
+/*-----------------------------------------------------------------*/
+/* simStopBPCB - simulator stopped break point                     */
+/*-----------------------------------------------------------------*/
+static int simStopBPCB( unsigned int addr)
+{
+  fprintf(stdout,"Simulator stopped at Address 0x%04x\n",addr);
+  fprintf(stdout,"%s",simResponse());
+  return 1;
+}
+
+/*-----------------------------------------------------------------*/
+/* clearUSERbp - deletes USER break point at address               */
+/*-----------------------------------------------------------------*/
+void clearUSERbp ( unsigned int addr )
+{
+    breakp *bp;
+
+    /* for break points delete if they are STEP */
+    for ( bp = hTabFirstItemWK(bptable,addr); bp ;
+          bp = hTabNextItemWK(bptable)) {
+
+        /* if this is a step then delete */
+        if (bp->bpType == USER || bp->bpType == TMPUSER)
+        {
+            hTabDeleteItem(&bptable,bp->addr,bp,DELETE_ITEM,NULL);
+
+            /* if this leaves no other break points then
+               send command to simulator to delete bp from this addr */
+            if (hTabSearch(bptable,bp->addr) == NULL)
+            {
+                simClearBP(bp->addr);
+            }
+            fprintf(stdout,"Deleted breakpoint %d\n",
+                    bp->bpnum);
+            userBpPresent-- ;
+            freeUSERbp(bp);
+            break;
+        }
+    }
+
+    if (!bp)
+        fprintf(stderr,"No breakpoint at address 0x%x.\n",addr);
+}
+
+/*-----------------------------------------------------------------*/
+/* dispatchCB - will lookup the bp table and dispatch the cb funcs */
+/*-----------------------------------------------------------------*/
+int dispatchCB (unsigned addr, context *ctxt)
+{
+    breakp *bp;
+    int rv =0;
+
+    Dprintf(D_break, ("break: dispatchCB: addr:0x%x \n", addr));
+
+    /* if no break points set for this address
+       then use a simulator stop break point */
+    if ((bp = hTabFirstItemWK(bptable,addr)) == NULL) {
+      if ( doingSteps == 2 ) return 1;
+      if ( doingSteps ) return 0;
+      if ( contsim    ) return 0;
+      return simStopBPCB(addr);
+    }
+
+    /* dispatch the call back functions */
+    for (; bp; bp = hTabNextItemWK(bptable))
+    {
+        rv += (*bp->callBack)(addr,bp,ctxt);
+    }
+
+    if (rv == 0) {
+      Dprintf(D_break, ("break: dispatchCB: WARNING rv==0\n"));
+    }
+
+    return rv;
+}
+
+/*-----------------------------------------------------------------*/
+/* fentryCB - callback function for function entry                 */
+/*-----------------------------------------------------------------*/
+BP_CALLBACK(fentryCB)
+{
+    function *func;
+
+    /* we save the value of SP
+       which will be used to display the value of local variables
+       and parameters on the stack */
+    ctxt->func->stkaddr = simGetValue (0x81,'I',1);
+
+    Dprintf(D_break, ("break: fentryCB: BP_CALLBACK entry %s sp=0x%02x %p\n",
+                      ctxt->func->sym->name,
+                      ctxt->func->stkaddr, p_callStack));
+
+    /* and set laddr of calling function to return addr from stack */
+    if ((func = STACK_PEEK(callStack)))
+    {
+        /* extern stack ?? 'A' */
+        func->laddr = simGetValue (ctxt->func->stkaddr-1,'B',2);
+    }
+    /* add the current function into the call stack */
+    STACK_PUSH(callStack,ctxt->func);
+
+    return 0;
+}
+
+/*-----------------------------------------------------------------*/
+/* fexitCB - call back for function exit                           */
+/*-----------------------------------------------------------------*/
+BP_CALLBACK(fexitCB)
+{
+    function *func;
+    /* pop the top most from the call stack */
+    func = STACK_POP(callStack);
+
+    if (!func)
+    {
+        fprintf(stdout, "Stack underflow\n");
+        return 1;
+    }
+
+    Dprintf(D_break, ("break: fexitCB: BP_CALLBACK entry %s %p\n", func->sym->name, p_callStack));
+
+    /* check main function */
+    if ( !strcmp(func->sym->name, "main"))
+    {
+        fprintf(stdout, "Program exited with code %lu.\n", simGetValue (0x82,'I',2));
+        return 1;
+    }
+    return 0;
+}
+/*-----------------------------------------------------------------*/
+/* userBpCB - call back function for user break points             */
+/*-----------------------------------------------------------------*/
+BP_CALLBACK(userBpCB)
+{
+    bp->hitCnt++ ;
+    Dprintf(D_break, ("break: userBpCB: BP_CALLBACK entry hit=%d ignor=%d\n",
+                      bp->hitCnt, bp->ignoreCnt));
+
+    if ( bp->ignoreCnt > bp->hitCnt )
+        return 0;
+
+    if ( bp->condition )
+    {
+        if (! conditionIsTrue( bp->condition, ctxt ))
+            return 0;
+    }
+
+    if ( bp->commands )
+    {
+        Dprintf(D_break, ("break: userBpCB: commands:%p\n", bp->commands));
+        setCmdLine(bp->commands);
+    }
+
+    if (srcMode == SRC_CMODE) {
+        fprintf(stdout,"Breakpoint %d, %s() at %s:%d\n",
+                bp->bpnum,
+                ctxt->func->sym->name,
+                ctxt->func->mod->c_name,
+                ctxt->cline+1);
+        if (ctxt->func->mod && ctxt->cline > 0)
+            fprintf(stdout,"%d\t%s",ctxt->cline+1,
+                    ctxt->func->mod->cLines[ctxt->cline]->src);
+    } else {
+        fprintf(stdout,"Breakpoint %d, %s() at %s:%d\n",
+                bp->bpnum,
+                ctxt->func->sym->name,
+                ctxt->func->mod->asm_name,
+                ctxt->asmline+1);
+        if (ctxt->func->mod && ctxt->asmline > 0)
+            fprintf(stdout,"%d\t%s",ctxt->asmline+1,
+                    ctxt->func->mod->asmLines[ctxt->asmline]->src);
+    }
+
+    if ( bp->bpType == TMPUSER && bp->bpnum > 0 )
+    {
+        hTabDeleteItem(&bptable,bp->addr,bp,DELETE_ITEM,NULL);
+
+        /* if this leaves no other break points then
+           send command to simulator to delete bp from this addr */
+        if (hTabSearch(bptable,bp->addr) == NULL)
+        {
+            simClearBP (bp->addr);
+            Dprintf(D_break, ("break: simClearBP 0x%x\n", bp->addr));
+
+        }
+        userBpPresent-- ;
+        freeUSERbp(bp);
+    }
+    return 1;
+}
+
+/*-----------------------------------------------------------------*/
+/* stepBpCB - call back function for step break points             */
+/*-----------------------------------------------------------------*/
+BP_CALLBACK(stepBpCB)
+{
+    static function *lfunc = NULL;
+
+    Dprintf(D_break, ("break: stepBpCB: BP_CALLBACK entry\n"));
+
+    if (srcMode == SRC_CMODE) {
+  if ((lfunc && lfunc != ctxt->func) || !lfunc)
+      fprintf(stdout,"%s () at %s:%d\n",
+        ctxt->func->sym->name,
+        ctxt->func->mod->c_name,
+        ctxt->cline+1);
+
+  if (ctxt->func->mod && ctxt->cline > 0) {
+      fprintf(stdout,"%d\t%s",ctxt->cline+1 ,
+        ctxt->func->mod->cLines[ctxt->cline]->src);
+  }
+    } else {
+  if ((lfunc && lfunc != ctxt->func) || !lfunc)
+      fprintf(stdout,"%s () at %s:%d\n",
+        ctxt->func->sym->name,
+        ctxt->func->mod->asm_name,
+        ctxt->asmline);
+
+  if (ctxt->func->mod && ctxt->cline > 0) {
+      fprintf(stdout,"%d\t%s",ctxt->asmline ,
+        ctxt->func->mod->asmLines[ctxt->asmline]->src);
+  }
+    }
+    lfunc = ctxt->func;
+
+    deleteSTEPbp();
+    return 1;
+}
+
+/*-----------------------------------------------------------------*/
+/* nextBpCB - call back function for next break points             */
+/*-----------------------------------------------------------------*/
+BP_CALLBACK(nextBpCB)
+{
+    static function *lfunc = NULL;
+
+    Dprintf(D_break, ("break: nextBpCB: BP_CALLBACK entry\n"));
+
+    if (srcMode == SRC_CMODE) {
+  if ((lfunc && lfunc != ctxt->func) || !lfunc)
+      fprintf(stdout,"%s () at %s:%d\n",
+        ctxt->func->sym->name,
+        ctxt->func->mod->c_name,
+        ctxt->cline+1);
+
+  if (ctxt->func->mod && ctxt->cline > 0)
+      fprintf(stdout,"%d\t%s",ctxt->cline+1,
+        ctxt->func->mod->cLines[ctxt->cline]->src);
+    } else {
+  if ((lfunc && lfunc != ctxt->func) || !lfunc)
+      fprintf(stdout,"%s () at %s:%d\n",
+        ctxt->func->sym->name,
+        ctxt->func->mod->asm_name,
+        ctxt->asmline);
+
+  if (ctxt->func->mod && ctxt->asmline > 0)
+      fprintf(stdout,"%d\t%s",ctxt->asmline,
+        ctxt->func->mod->asmLines[ctxt->asmline]->src);
+
+    }
+    lfunc = ctxt->func;
+
+    deleteNEXTbp();
+    return 1;
+}