--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/trace.c	Mon Jul 09 09:29:33 2018 +0900
@@ -0,0 +1,328 @@
+/* 6808 Simulator V092
+ *
+ * tracer
+
+*/
+
+#include<stdio.h>
+#include<stdlib.h>
+#include<ctype.h>
+#include<signal.h>
+#include<sys/time.h>
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <time.h>
+
+#ifdef USE_TERMIOS
+#include <termios.h>
+#endif
+
+#define engine extern
+#include "v09.h"
+
+struct termios termsetting;
+
+int xmstat; /* 0= no XMODEM transfer, 1=send, 2=receiver */
+unsigned char xmbuf[132];
+int xidx;
+int acknak;
+int rcvdnak;
+int blocknum;
+
+extern FILE *logfile;
+extern FILE *infile;
+extern FILE *xfile;
+extern FILE *disk[];
+
+extern void hexadump( unsigned char *b, int l, int loc, int w);
+extern int disasm(int,int);
+extern void restore_term(void) ;
+
+#ifdef USE_MMU
+extern char *prog ;   // for disass
+extern Byte * mem0(Byte *iphymem, Word adr, Byte *immu) ;
+#endif
+
+void do_exit(void) {
+        restore_term();
+        exit(0);
+}
+
+
+typedef struct bp {
+  int address;
+  int count;
+  struct bp *next;
+} BP, *BPTR;
+
+BPTR breakpoint = 0;
+int bpskip = 0;
+int trskip = 0;
+int stkskip = 0;
+
+int getarg(char *buf, char** next) {
+        return strtol(buf,(char**)next,0);
+}
+
+void printhelp(void)
+{
+  printf( 
+     "  s [count]  one step trace\n"
+     "  n          step over\n"
+     "  f          finish this call (until stack pop)\n"
+     "  b [adr]    set break point\n"
+     "  l          break point list\n"
+     "  d [n]      delte break point list\n"
+     "  c  [count] continue;\n"
+     "  x  [adr]   dump\n"
+#ifdef USE_MMU
+     "  xp [adr]   dump physical memory\n"
+#endif
+     "  xi [adr]   disassemble\n"
+     "  0  file    disk drive 0 image\n"
+     "  1  file    disk drive 1 image\n"
+     "  L  file    start log to file\n"
+     "  S  file    set input file\n"
+     "  X  exit\n"
+     "  q  exit\n"
+     "  U  file    upload from srecord file \n"
+     "  D  file    download to srecord file \n"
+     "  R  do reset\n"
+     "  h,?  print this\n"
+    );
+}
+
+void do_escape(void) {
+        char s[80];
+        int adr,skip;
+        if (bpskip) { // skip unbreak instruction
+            bpskip--;
+            for(BPTR b = breakpoint; b ; b=b->next) {
+                if (pcreg==b->address) {
+                    if (b->count) b->count--;
+                    if (b->count==0) {
+                        goto restart0;
+                    }
+                }
+            }
+            return;
+        }
+        if (stkskip) { // skip until return
+           if (sreg < stkskip ) return;
+        }
+restart0:
+        stkskip = 0;
+        restore_term();
+#ifdef USE_MMU
+        Byte *phyadr = mem0(phymem,pcreg,mmu);
+        prog = (char*)phyadr - pcreg;
+#endif
+        do_trace(stdout);
+        if (trskip>1) { // show trace and step
+            trskip--;
+            set_term(escchar);
+            return; 
+        }
+restart:
+        printf("v09>");
+        fgets(s, 80, stdin);
+        if (s[0])
+                s[strlen(s) - 1] = 0;
+        switch (s[0]) {
+        case 's':   // one step trace
+                trskip = 1;
+                if (s[1]) {
+                   trskip = getarg(s+1,0);
+                }
+                bpskip = 0;
+                attention = escape = 1;
+                break;
+        case 'n':   // step over
+                stkskip = sreg;
+                attention = escape = 1;
+                break;
+        case 'f':   // finish this call (until stack pop)
+                stkskip = sreg + 2;
+                attention = escape = 1;
+                break;
+        case 'b':   // set break point
+                {
+                  BPTR bp = calloc(1,sizeof(BP));
+                  bp->next = breakpoint;
+                  breakpoint = bp;
+                  bp->count = 1;
+                  if (s[1]) {
+                     char *next;
+                     bp->address = getarg(s+1,&next);
+                     if (next[0]) {
+                         bp->count = getarg(next,&next);
+                     }
+                  } else {
+                     bp->address = pcreg;
+                  }
+                }
+                bpskip = -1;
+                goto restart;
+        case 'l':   // break point list
+                for(BPTR bp = breakpoint; bp ; bp = bp->next) {
+                    printf("%x %i\n", bp->address, bp->count);
+                }
+                goto restart;
+        case 'd':   // delte break point list
+                if (s[1]) {
+                   int trskip = getarg(s+1,0);
+                   BPTR *prev = &breakpoint;
+                   for(BPTR bp = breakpoint; bp ; bp = bp->next) {
+                       if (trskip-- == 0) {
+                          if (bp) {
+                              *prev = bp->next;
+                          }
+                          break;
+                       }
+                       prev = &bp->next;
+                   }
+                }
+                goto restart;
+        case 'c':   // continue;
+                bpskip = -1;
+                attention = escape = 1;
+                if (s[1]) {
+                   bpskip = getarg(s+1,0);
+                }
+                break;
+        case 'x':   // dump
+                skip = 1;
+                if (s[1]=='i') skip=2;
+                if (s[1]=='p') skip=2;
+                if (s[skip]) {
+                   char *next;
+                   int adr = getarg(s+skip,&next);
+                   int len = 32;
+                   if (next[0]) {
+                      len =  getarg(next,&next);
+                   }
+                   if (skip==2 && s[1]=='i') {
+                     Word end = adr + len;
+                     while(adr < end) {
+#ifdef USE_MMU
+                        Byte *phyadr = mem0(phymem,adr,mmu);
+                        prog = (char*)phyadr - adr  ;
+                        if (phyadr > phymem+memsize) goto restart;
+#endif
+                        int len = adr+16<end? 16 : end-adr -1 ;
+                        adr = disasm(adr,adr+len);
+                      }
+                   } else {
+#ifdef USE_MMU
+                     for(int i=0; len > 0 ; i+=16, len-=16) {
+                        if (skip==2 && s[1]=='p') {
+                            if (adr+i > memsize) goto restart;
+                            hexadump(phymem+adr+i,len>16?16:len,adr+i,16);
+                        } else {
+                            Byte *phyadr = mem0(phymem,adr+i,mmu);
+                            if (phyadr > phymem+memsize) goto restart;
+                            hexadump(phyadr,len>16?16:len,adr+i,16);
+                        }
+                     }
+#else
+                     for(int i=0; len > 0 ; i+=16, len-=16) {
+                        hexadump(mem+adr+i,len>16?16:len,adr+i,16);
+                     }
+#endif
+                   }
+                } else 
+                   disasm(pcreg,pcreg+32);
+                goto restart;
+        case 'L':
+                if (logfile)
+                        fclose(logfile);
+                logfile = 0;
+                if (s[1]) {
+                        int i=1; while(s[i]==' ') i++;
+                        logfile = fopen(s + i, "w");
+                }
+                break;
+        case 'S':
+                if (infile)
+                        fclose(infile);
+                infile = 0;
+                if (s[1]) {
+                        int i=1; while(s[i]==' ') i++;
+                        infile = fopen(s + i, "r");
+                }
+                break;
+        case 'h':
+        case '?':
+                printhelp();
+                goto restart;
+        case 'X':
+        case 'q':
+                if (!xmstat)
+                        do_exit();
+                else {
+                        xmstat = 0;
+                        fclose(xfile);
+                        xfile = 0;
+                }
+                break;
+        case '0':
+        case '1':
+                {   FILE **drv = &disk[ s[0]-'0'] ;
+                if (*drv)
+                        fclose(*drv);
+                *drv = 0;
+                if (s[1]) {
+                        int i=1; while(s[i]==' ') i++;
+                        *drv = fopen(s + i, "r+b");
+                        if ( *drv == 0 ) { printf("can't open %s\n", &s[i]); }
+                }
+                }
+                break;
+        case 'U':
+                if (xfile)
+                        fclose(xfile);
+                xfile = 0;
+                if (s[1]) {
+                        int i=1; while(s[i]==' ') i++;
+                        xfile = fopen(s + i, "rb");
+                        if ( xfile == 0 ) { printf("can't open %s\n", &s[i]); }
+                }
+                if (xfile)
+                        xmstat = 1;
+                else
+                        xmstat = 0;
+                xidx = 0;
+                acknak = 21;
+                rcvdnak = EOF;
+                blocknum = 1;
+                break;
+        case 'D':
+                if (xfile)
+                        fclose(xfile);
+                xfile = 0;
+                if (s[1]) {
+                        int i=1; while(s[i]==' ') i++;
+                        xfile = fopen(s + i, "wb");
+                        if ( xfile == 0 ) { printf("can't open %s\n", &s[i]); }
+                }
+                if (xfile)
+                        xmstat = 2;
+                else
+                        xmstat = 0;
+                xidx = 0;
+                acknak = 21;
+                blocknum = 1;
+                break;
+        case 'R':
+                pcreg = (mem[0xfffe] << 8) + mem[0xffff];
+                bpskip = 0;
+                attention = escape = 1;
+                break;
+        }
+        if (tracing||breakpoint||trskip||bpskip||stkskip) { attention = escape = 1; }
+        else attention = 0;
+        set_term(escchar);
+}
+