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* Made slight modification in configure
* Select from make first and make more to allow first time compilation
* Added simple image dump and reload
* Added extended COLD functionality in 'COLD for image reboot
* Added boot procedures in hash.fs and history.fs

    1: /*
    2:   $Id: main.c,v 1.16 1994/11/15 15:55:40 pazsan Exp $
    3:   Copyright 1993 by the ANSI figForth Development Group
    4: */
    5: 
    6: #include <ctype.h>
    7: #include <stdio.h>
    8: #include <string.h>
    9: #include <math.h>
   10: #include <sys/types.h>
   11: #include <sys/stat.h>
   12: #include <fcntl.h>
   13: #include <assert.h>
   14: #include <stdlib.h>
   15: #include "forth.h"
   16: #include "io.h"
   17: #ifdef USE_GETOPT
   18: #  include "getopt.h"
   19: #else
   20:    extern int getopt (int , char * const [], const char *);
   21: 
   22:    extern char *optarg;
   23:    extern int optind, opterr;
   24: #endif
   25: 
   26: #ifndef DEFAULTPATH
   27: #  define DEFAULTPATH "/usr/local/lib/gforth:."
   28: #endif
   29: 
   30: #ifdef DIRECT_THREADED
   31: #  define CA(n)	(symbols[(n)])
   32: #else
   33: #  define CA(n)	((int)(symbols+(n)))
   34: #endif
   35: 
   36: #define maxaligned(n)	((((Cell)n)+sizeof(Float)-1)&-sizeof(Float))
   37: 
   38: static int dictsize=0;
   39: static int dsize=0;
   40: static int rsize=0;
   41: static int fsize=0;
   42: static int lsize=0;
   43: char *progname;
   44: 
   45: 
   46: /* image file format:
   47:  *   size of image with stacks without tags (in bytes)
   48:  *   size of image without stacks and tags (in bytes)
   49:  *   size of data and FP stack (in bytes)
   50:  *   pointer to start of code
   51:  *   pointer into throw (for signal handling)
   52:  *   pointer to dictionary
   53:  *   data (size in image[1])
   54:  *   tags (1 bit/data cell)
   55:  *
   56:  * tag==1 mean that the corresponding word is an address;
   57:  * If the word is >=0, the address is within the image;
   58:  * addresses within the image are given relative to the start of the image.
   59:  * If the word is =-1, the address is NIL,
   60:  * If the word is between -2 and -5, it's a CFA (:, Create, Constant, User)
   61:  * If the word is -6, it's a DOES> CFA
   62:  * If the word is -7, it's a DOES JUMP
   63:  * If the word is <-7, it's a primitive
   64:  */
   65: 
   66: void relocate(Cell *image, char *bitstring, int size, Label symbols[])
   67: {
   68:   int i=0, j, k, steps=(size/sizeof(Cell))/8;
   69:   char bits;
   70: /*   static char bits[8]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01};*/
   71:    
   72:   for(k=0; k<=steps; k++)
   73:     for(j=0, bits=bitstring[k]; j<8; j++, i++, bits<<=1)
   74:       if(bits & 0x80)
   75: 	if(image[i]<0)
   76: 	  switch(image[i])
   77: 	    {
   78: 	    case CF_NIL      : image[i]=0; break;
   79: 	    case CF(DOCOL)   :
   80: 	    case CF(DOVAR)   :
   81: 	    case CF(DOCON)   :
   82: 	    case CF(DOUSER)  : 
   83: 	    case CF(DODEFER) : MAKE_CF(image+i,symbols[CF(image[i])]); break;
   84: 	    case CF(DODOES)  : MAKE_DOES_CF(image+i,image[i+1]+((int)image));
   85: 	      break;
   86: 	    case CF(DOESJUMP): MAKE_DOES_HANDLER(image+i); break;
   87: 	    default          : image[i]=(Cell)CA(CF(image[i]));
   88: 	    }
   89: 	else
   90: 	  image[i]+=(Cell)image;
   91: }
   92: 
   93: Cell *loader(FILE *imagefile)
   94: {
   95:   Cell header[3];
   96:   Cell *image;
   97:   int wholesize;
   98:   int imagesize; /* everything needed by the image */
   99:   
  100:   fread(header,1,3*sizeof(Cell),imagefile);
  101:   if (dictsize==0)
  102:     dictsize = header[0];
  103:   if (dsize==0)
  104:     dsize=header[2];
  105:   if (rsize==0)
  106:     rsize=header[2];
  107:   if (fsize==0)
  108:     fsize=header[2];
  109:   if (lsize==0)
  110:     lsize=header[2];
  111:   dictsize=maxaligned(dictsize);
  112:   dsize=maxaligned(dsize);
  113:   rsize=maxaligned(rsize);
  114:   lsize=maxaligned(lsize);
  115:   fsize=maxaligned(fsize);
  116:   
  117:   wholesize = dictsize+dsize+rsize+fsize+lsize;
  118:   imagesize = header[1]+((header[1]-1)/sizeof(Cell))/8+1;
  119:   image=malloc(wholesize>imagesize?wholesize:imagesize);
  120:   memset(image,0,wholesize); /* why? - anton */
  121:   image[0]=header[0];
  122:   image[1]=header[1];
  123:   image[2]=header[2];
  124:   
  125:   fread(image+3,1,header[1]-3*sizeof(Cell),imagefile);
  126:   fread(((void *)image)+header[1],1,((header[1]-1)/sizeof(Cell))/8+1,
  127: 	imagefile);
  128:   fclose(imagefile);
  129:   
  130:   if(image[5]==0) {
  131:     relocate(image,(char *)image+header[1],header[1],engine(0,0,0,0,0));
  132:   }
  133:   else if(image[5]!=(Cell)image) {
  134:     fprintf(stderr,"Corrupted image address, please recompile image\n");
  135:     exit(1);
  136:   }
  137: 
  138:   CACHE_FLUSH(image,image[1]);
  139:   
  140:   return(image);
  141: }
  142: 
  143: int go_forth(Cell *image, int stack, Cell *entries)
  144: {
  145:   Cell *sp=(Cell*)((void *)image+dictsize+dsize);
  146:   Address lp=(Address)((void *)sp+lsize);
  147:   Float *fp=(Float *)((void *)lp+fsize);
  148:   Cell *rp=(Cell*)((void *)fp+rsize);
  149:   Xt *ip=(Xt *)(image[3]);
  150:   int throw_code;
  151:   
  152:   for(;stack>0;stack--)
  153:     *--sp=entries[stack-1];
  154:   
  155:   install_signal_handlers(); /* right place? */
  156:   
  157:   if ((throw_code=setjmp(throw_jmp_buf))) {
  158:     static Cell signal_data_stack[8];
  159:     static Cell signal_return_stack[8];
  160:     static Float signal_fp_stack[1];
  161:     
  162:     signal_data_stack[7]=throw_code;
  163:     
  164:     return((int)engine((Xt *)image[4],signal_data_stack+7,
  165: 		       signal_return_stack+8,signal_fp_stack,0));
  166:   }
  167:   
  168:   return((int)engine(ip,sp,rp,fp,lp));
  169: }
  170: 
  171: int convsize(char *s, int elemsize)
  172: /* converts s of the format #+u (e.g. 25k) into the number of bytes.
  173:    the unit u can be one of bekM, where e stands for the element
  174:    size. default is e */
  175: {
  176:   char *endp;
  177:   int n,m;
  178: 
  179:   m = elemsize;
  180:   n = strtoul(s,&endp,0);
  181:   if (endp!=NULL) {
  182:     if (strcmp(endp,"b")==0)
  183:       m=1;
  184:     else if (strcmp(endp,"k")==0)
  185:       m=1024;
  186:     else if (strcmp(endp,"M")==0)
  187:       m=1024*1024;
  188:     else if (strcmp(endp,"e")!=0) {
  189:       fprintf(stderr,"%s: cannot grok size specification %s\n", progname, s);
  190:       exit(1);
  191:     }
  192:   }
  193:   return n*m;
  194: }
  195: 
  196: int main(int argc, char **argv, char **env)
  197: {
  198:   char *path, *path1;
  199:   char *imagename="gforth.fi";
  200:   FILE *image_file;
  201:   int c, retvalue;
  202: 	  
  203: #if defined(i386) && defined(ALIGNMENT_CHECK) && !defined(DIRECT_THREADED)
  204: 	/* turn on alignment checks on the 486.
  205: 	 * on the 386 this should have no effect. */
  206: 	__asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
  207: #endif
  208: 
  209:   progname = argv[0];
  210:   if ((path=getenv("GFORTHPATH"))==NULL)
  211:     path = strcpy(malloc(strlen(DEFAULTPATH)+1),DEFAULTPATH);
  212:   opterr=0;
  213:   while (1) {
  214:     int option_index=0;
  215: #ifdef USE_GETOPT
  216:     static struct option opts[] = {
  217:       {"image-file", required_argument, NULL, 'i'},
  218:       {"dictionary-size", required_argument, NULL, 'm'},
  219:       {"data-stack-size", required_argument, NULL, 'd'},
  220:       {"return-stack-size", required_argument, NULL, 'r'},
  221:       {"fp-stack-size", required_argument, NULL, 'f'},
  222:       {"locals-stack-size", required_argument, NULL, 'l'},
  223:       {"path", required_argument, NULL, 'p'},
  224:       {0,0,0,0}
  225:       /* no-init-file, no-rc? */
  226:     };
  227: 
  228:     c = getopt_long(argc, argv, "i:m:d:r:f:l:p:", opts, &option_index);
  229: #else
  230:     c = getopt(argc, argv, "i:m:d:r:f:l:p:");
  231: #endif
  232: 
  233:     if (c==EOF)
  234:       break;
  235:     if (c=='?') {
  236:       optind--;
  237:       break;
  238:     }
  239:     switch (c) {
  240:     case 'i': imagename = optarg; break;
  241:     case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
  242:     case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
  243:     case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
  244:     case 'f': fsize = convsize(optarg,sizeof(Float)); break;
  245:     case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
  246:     case 'p': path = optarg; break;
  247:     }
  248:   }
  249:   path1=path;
  250:   do {
  251:     char *pend=strchr(path, ':');
  252:     if (pend==NULL)
  253:       pend=path+strlen(path);
  254:     if (strlen(path)==0) {
  255:       fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n",
  256: 	      progname, imagename, path1);
  257:       exit(1);
  258:     }
  259:     {
  260:       int dirlen=pend-path;
  261:       char fullfilename[dirlen+strlen(imagename)+2];
  262:       memcpy(fullfilename, path, dirlen);
  263:       if (fullfilename[dirlen-1]!='/')
  264: 	fullfilename[dirlen++]='/';
  265:       strcpy(fullfilename+dirlen,imagename);
  266:       image_file=fopen(fullfilename,"rb");
  267:     }
  268:     path=pend+(*pend==':');
  269:   } while (image_file==NULL);
  270:   
  271:   {
  272:     Cell environ[]= {
  273:       (Cell)argc-(optind-1),
  274:       (Cell)(argv+(optind-1)),
  275:       (Cell)path1};
  276:     argv[optind-1] = progname;
  277:     /*
  278:        for (i=0; i<environ[0]; i++)
  279:        printf("%s\n", ((char **)(environ[1]))[i]);
  280:        */
  281:     retvalue=go_forth(loader(image_file),3,environ);
  282:     deprep_terminal();
  283:     exit(retvalue);
  284:   }
  285: }