File:  [gforth] / gforth / engine / main.c
Revision 1.17: download - view: text, annotated - select for diffs
Fri Jan 1 15:20:37 1999 UTC (25 years, 3 months ago) by anton
Branches: MAIN
CVS tags: HEAD
fixed --debug bug (printed non-printing characters (magic[7])).
fixed buglet in configure.in (now heeds LIBS even for hppa).
set version to snapshot

    1: /* command line interpretation, image loading etc. for Gforth
    2: 
    3: 
    4:   Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.
    5: 
    6:   This file is part of Gforth.
    7: 
    8:   Gforth is free software; you can redistribute it and/or
    9:   modify it under the terms of the GNU General Public License
   10:   as published by the Free Software Foundation; either version 2
   11:   of the License, or (at your option) any later version.
   12: 
   13:   This program is distributed in the hope that it will be useful,
   14:   but WITHOUT ANY WARRANTY; without even the implied warranty of
   15:   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   16:   GNU General Public License for more details.
   17: 
   18:   You should have received a copy of the GNU General Public License
   19:   along with this program; if not, write to the Free Software
   20:   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   21: */
   22: 
   23: #include "config.h"
   24: #include <errno.h>
   25: #include <ctype.h>
   26: #include <stdio.h>
   27: #include <unistd.h>
   28: #include <string.h>
   29: #include <math.h>
   30: #include <sys/types.h>
   31: #include <sys/stat.h>
   32: #include <fcntl.h>
   33: #include <assert.h>
   34: #include <stdlib.h>
   35: #ifndef STANDALONE
   36: #if HAVE_SYS_MMAN_H
   37: #include <sys/mman.h>
   38: #endif
   39: #endif
   40: #include "forth.h"
   41: #include "io.h"
   42: #include "getopt.h"
   43: #ifdef STANDALONE
   44: #include <systypes.h>
   45: #endif
   46: 
   47: #define PRIM_VERSION 1
   48: /* increment this whenever the primitives change in an incompatible way */
   49: 
   50: #ifndef DEFAULTPATH
   51: #  define DEFAULTPATH "~+"
   52: #endif
   53: 
   54: #ifdef MSDOS
   55: jmp_buf throw_jmp_buf;
   56: #endif
   57: 
   58: #if defined(DIRECT_THREADED) 
   59: #  define CA(n)	(symbols[(n)])
   60: #else
   61: #  define CA(n)	((Cell)(symbols+(n)))
   62: #endif
   63: 
   64: #define maxaligned(n)	(typeof(n))((((Cell)n)+sizeof(Float)-1)&-sizeof(Float))
   65: 
   66: static UCell dictsize=0;
   67: static UCell dsize=0;
   68: static UCell rsize=0;
   69: static UCell fsize=0;
   70: static UCell lsize=0;
   71: int offset_image=0;
   72: int die_on_signal=0;
   73: #ifndef INCLUDE_IMAGE
   74: static int clear_dictionary=0;
   75: static size_t pagesize=0;
   76: #endif
   77: static int debug=0;
   78: char *progname;
   79: 
   80: /* image file format:
   81:  *  "#! binary-path -i\n" (e.g., "#! /usr/local/bin/gforth-0.4.0 -i\n")
   82:  *   padding to a multiple of 8
   83:  *   magic: "Gforth2x" means format 0.4,
   84:  *              where x is a byte with
   85:  *              bit 7:   reserved = 0
   86:  *              bit 6:5: address unit size 2^n octets
   87:  *              bit 4:3: character size 2^n octets
   88:  *              bit 2:1: cell size 2^n octets
   89:  *              bit 0:   endian, big=0, little=1.
   90:  *  The magic are always 8 octets, no matter what the native AU/character size is
   91:  *  padding to max alignment (no padding necessary on current machines)
   92:  *  ImageHeader structure (see below)
   93:  *  data (size in ImageHeader.image_size)
   94:  *  tags ((if relocatable, 1 bit/data cell)
   95:  *
   96:  * tag==1 means that the corresponding word is an address;
   97:  * If the word is >=0, the address is within the image;
   98:  * addresses within the image are given relative to the start of the image.
   99:  * If the word =-1 (CF_NIL), the address is NIL,
  100:  * If the word is <CF_NIL and >CF(DODOES), it's a CFA (:, Create, ...)
  101:  * If the word =CF(DODOES), it's a DOES> CFA
  102:  * If the word =CF(DOESJUMP), it's a DOES JUMP (2 Cells after DOES>,
  103:  *					possibly containing a jump to dodoes)
  104:  * If the word is <CF(DOESJUMP), it's a primitive
  105:  */
  106: 
  107: typedef struct {
  108:   Address base;		/* base address of image (0 if relocatable) */
  109:   UCell checksum;	/* checksum of ca's to protect against some
  110: 			   incompatible	binary/executable combinations
  111: 			   (0 if relocatable) */
  112:   UCell image_size;	/* all sizes in bytes */
  113:   UCell dict_size;
  114:   UCell data_stack_size;
  115:   UCell fp_stack_size;
  116:   UCell return_stack_size;
  117:   UCell locals_stack_size;
  118:   Xt *boot_entry;	/* initial ip for booting (in BOOT) */
  119:   Xt *throw_entry;	/* ip after signal (in THROW) */
  120:   Cell unused1;		/* possibly tib stack size */
  121:   Cell unused2;
  122:   Address data_stack_base; /* this and the following fields are initialized by the loader */
  123:   Address fp_stack_base;
  124:   Address return_stack_base;
  125:   Address locals_stack_base;
  126: } ImageHeader;
  127: /* the image-header is created in main.fs */
  128: 
  129: void relocate(Cell *image, const char *bitstring, int size, Label symbols[])
  130: {
  131:   int i=0, j, k, steps=(size/sizeof(Cell))/RELINFOBITS;
  132:   Cell token;
  133:   char bits;
  134: /*   static char bits[8]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01};*/
  135: 
  136: /*  printf("relocating %x[%x]\n", image, size); */
  137:    
  138:   for(k=0; k<=steps; k++)
  139:     for(j=0, bits=bitstring[k]; j<RELINFOBITS; j++, i++, bits<<=1) {
  140:       /*      fprintf(stderr,"relocate: image[%d]\n", i);*/
  141:       if(bits & (1U << (RELINFOBITS-1))) {
  142: 	/* fprintf(stderr,"relocate: image[%d]=%d\n", i, image[i]);*/
  143: 	if((token=image[i])<0)
  144: 	  switch(token)
  145: 	    {
  146: 	    case CF_NIL      : image[i]=0; break;
  147: #if !defined(DOUBLY_INDIRECT)
  148: 	    case CF(DOCOL)   :
  149: 	    case CF(DOVAR)   :
  150: 	    case CF(DOCON)   :
  151: 	    case CF(DOUSER)  : 
  152: 	    case CF(DODEFER) : 
  153: 	    case CF(DOFIELD) : MAKE_CF(image+i,symbols[CF(token)]); break;
  154: 	    case CF(DOESJUMP): MAKE_DOES_HANDLER(image+i); break;
  155: #endif /* !defined(DOUBLY_INDIRECT) */
  156: 	    case CF(DODOES)  :
  157: 	      MAKE_DOES_CF(image+i,image[i+1]+((Cell)image));
  158: 	      break;
  159: 	    default          :
  160: /*	      printf("Code field generation image[%x]:=CA(%x)\n",
  161: 		     i, CF(image[i])); */
  162: 	      image[i]=(Cell)CA(CF(token));
  163: 	    }
  164: 	else
  165: 	  image[i]+=(Cell)image;
  166:       }
  167:     }
  168: }
  169: 
  170: UCell checksum(Label symbols[])
  171: {
  172:   UCell r=PRIM_VERSION;
  173:   Cell i;
  174: 
  175:   for (i=DOCOL; i<=DOESJUMP; i++) {
  176:     r ^= (UCell)(symbols[i]);
  177:     r = (r << 5) | (r >> (8*sizeof(Cell)-5));
  178:   }
  179: #ifdef DIRECT_THREADED
  180:   /* we have to consider all the primitives */
  181:   for (; symbols[i]!=(Label)0; i++) {
  182:     r ^= (UCell)(symbols[i]);
  183:     r = (r << 5) | (r >> (8*sizeof(Cell)-5));
  184:   }
  185: #else
  186:   /* in indirect threaded code all primitives are accessed through the
  187:      symbols table, so we just have to put the base address of symbols
  188:      in the checksum */
  189:   r ^= (UCell)symbols;
  190: #endif
  191:   return r;
  192: }
  193: 
  194: Address verbose_malloc(Cell size)
  195: {
  196:   Address r;
  197:   /* leave a little room (64B) for stack underflows */
  198:   if ((r = malloc(size+64))==NULL) {
  199:     perror(progname);
  200:     exit(1);
  201:   }
  202:   r = (Address)((((Cell)r)+(sizeof(Float)-1))&(-sizeof(Float)));
  203:   if (debug)
  204:     fprintf(stderr, "malloc succeeds, address=$%lx\n", (long)r);
  205:   return r;
  206: }
  207: 
  208: Address my_alloc(Cell size)
  209: {
  210: #if HAVE_MMAP
  211:   static Address next_address=0;
  212:   Address r;
  213: 
  214: #if defined(MAP_ANON)
  215:   if (debug)
  216:     fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_ANON, ...); ", (long)next_address, (long)size);
  217:   r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
  218: #else /* !defined(MAP_ANON) */
  219:   /* Ultrix (at least) does not define MAP_FILE and MAP_PRIVATE (both are
  220:      apparently defaults) */
  221: #ifndef MAP_FILE
  222: # define MAP_FILE 0
  223: #endif
  224: #ifndef MAP_PRIVATE
  225: # define MAP_PRIVATE 0
  226: #endif
  227:   static int dev_zero=-1;
  228: 
  229:   if (dev_zero == -1)
  230:     dev_zero = open("/dev/zero", O_RDONLY);
  231:   if (dev_zero == -1) {
  232:     r = (Address)-1;
  233:     if (debug)
  234:       fprintf(stderr, "open(\"/dev/zero\"...) failed (%s), no mmap; ", 
  235: 	      strerror(errno));
  236:   } else {
  237:     if (debug)
  238:       fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FILE, dev_zero, ...); ", (long)next_address, (long)size);
  239:     r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FILE|MAP_PRIVATE, dev_zero, 0);
  240:   }
  241: #endif /* !defined(MAP_ANON) */
  242: 
  243:   if (r != (Address)-1) {
  244:     if (debug)
  245:       fprintf(stderr, "success, address=$%lx\n", (long) r);
  246:     if (pagesize != 0)
  247:       next_address = (Address)(((((Cell)r)+size-1)&-pagesize)+2*pagesize); /* leave one page unmapped */
  248:     return r;
  249:   }
  250:   if (debug)
  251:     fprintf(stderr, "failed: %s\n", strerror(errno));
  252: #endif /* HAVE_MMAP */
  253:   /* use malloc as fallback */
  254:   return verbose_malloc(size);
  255: }
  256: 
  257: #if (defined(mips) && !defined(INDIRECT_THREADED))
  258: /* the 256MB jump restriction on the MIPS architecture makes the
  259:    combination of direct threading and mmap unsafe. */
  260: #define dict_alloc(size) verbose_malloc(size)
  261: #else
  262: #define dict_alloc(size) my_alloc(size)
  263: #endif
  264: 
  265: void set_stack_sizes(ImageHeader * header)
  266: {
  267:   if (dictsize==0)
  268:     dictsize = header->dict_size;
  269:   if (dsize==0)
  270:     dsize = header->data_stack_size;
  271:   if (rsize==0)
  272:     rsize = header->return_stack_size;
  273:   if (fsize==0)
  274:     fsize = header->fp_stack_size;
  275:   if (lsize==0)
  276:     lsize = header->locals_stack_size;
  277:   dictsize=maxaligned(dictsize);
  278:   dsize=maxaligned(dsize);
  279:   rsize=maxaligned(rsize);
  280:   lsize=maxaligned(lsize);
  281:   fsize=maxaligned(fsize);
  282: }
  283: 
  284: void alloc_stacks(ImageHeader * header)
  285: {
  286:   header->dict_size=dictsize;
  287:   header->data_stack_size=dsize;
  288:   header->fp_stack_size=fsize;
  289:   header->return_stack_size=rsize;
  290:   header->locals_stack_size=lsize;
  291: 
  292:   header->data_stack_base=my_alloc(dsize);
  293:   header->fp_stack_base=my_alloc(fsize);
  294:   header->return_stack_base=my_alloc(rsize);
  295:   header->locals_stack_base=my_alloc(lsize);
  296: }
  297: 
  298: int go_forth(Address image, int stack, Cell *entries)
  299: {
  300:   Cell *sp=(Cell*)(((ImageHeader *)image)->data_stack_base + dsize);
  301:   Float *fp=(Float *)(((ImageHeader *)image)->fp_stack_base + fsize);
  302:   Cell *rp=(Cell *)(((ImageHeader *)image)->return_stack_base + rsize);
  303:   Address lp=((ImageHeader *)image)->locals_stack_base + lsize;
  304:   Xt *ip=(Xt *)(((ImageHeader *)image)->boot_entry);
  305: #ifdef SYSSIGNALS
  306:   int throw_code;
  307: #endif
  308: 
  309:   /* ensure that the cached elements (if any) are accessible */
  310:   IF_TOS(sp--);
  311:   IF_FTOS(fp--);
  312:   
  313:   for(;stack>0;stack--)
  314:     *--sp=entries[stack-1];
  315: 
  316: #if !defined(MSDOS) && !defined(SHARC) && !defined(_WIN32) && !defined(__EMX__)
  317:   get_winsize();
  318: #endif
  319:    
  320: #ifdef SYSSIGNALS
  321:   install_signal_handlers(); /* right place? */
  322:   
  323:   if ((throw_code=setjmp(throw_jmp_buf))) {
  324:     static Cell signal_data_stack[8];
  325:     static Cell signal_return_stack[8];
  326:     static Float signal_fp_stack[1];
  327: 
  328:     signal_data_stack[7]=throw_code;
  329:     
  330:     return((int)engine(((ImageHeader *)image)->throw_entry,signal_data_stack+7,
  331: 		       signal_return_stack+8,signal_fp_stack,0));
  332:   }
  333: #endif
  334: 
  335:   return((int)engine(ip,sp,rp,fp,lp));
  336: }
  337: 
  338: #ifndef INCLUDE_IMAGE
  339: Address loader(FILE *imagefile, char* filename)
  340: /* returns the address of the image proper (after the preamble) */
  341: {
  342:   ImageHeader header;
  343:   Address image;
  344:   Address imp; /* image+preamble */
  345:   Char magic[8];
  346:   char magic7; /* size byte of magic number */
  347:   Cell preamblesize=0;
  348:   Label *symbols = engine(0,0,0,0,0);
  349:   Cell data_offset = offset_image ? 56*sizeof(Cell) : 0;
  350:   UCell check_sum;
  351:   static char* endianstring[]= { "big","little" };
  352:   Cell ausize = ((RELINFOBITS ==  8) ? 0 :
  353: 		 (RELINFOBITS == 16) ? 1 :
  354: 		 (RELINFOBITS == 32) ? 2 : 3);
  355:   Cell charsize = ((sizeof(Char) == 1) ? 0 :
  356: 		   (sizeof(Char) == 2) ? 1 :
  357: 		   (sizeof(Char) == 4) ? 2 : 3) + ausize;
  358:   Cell cellsize = ((sizeof(Cell) == 1) ? 0 :
  359: 		   (sizeof(Cell) == 2) ? 1 :
  360: 		   (sizeof(Cell) == 4) ? 2 : 3) + ausize;
  361:   
  362: 
  363: #ifndef DOUBLY_INDIRECT
  364:   check_sum = checksum(symbols);
  365: #else /* defined(DOUBLY_INDIRECT) */
  366:   check_sum = (UCell)symbols;
  367: #endif /* defined(DOUBLY_INDIRECT) */
  368:   
  369:   do {
  370:     if(fread(magic,sizeof(Char),8,imagefile) < 8) {
  371:       fprintf(stderr,"%s: image %s doesn't seem to be a Gforth (>=0.4) image.\n",
  372: 	      progname, filename);
  373:       exit(1);
  374:     }
  375:     preamblesize+=8;
  376:   } while(memcmp(magic,"Gforth2",7));
  377:   magic7 = magic[7];
  378:   if (debug) {
  379:     magic[7]='\0';
  380:     fprintf(stderr,"Magic found: %s $%x\n", magic, magic7);
  381:   }
  382: 
  383:   if(magic7 != (ausize << 5) + (charsize << 3) + (cellsize << 1) +
  384: #ifdef WORDS_BIGENDIAN
  385:        0
  386: #else
  387:        1
  388: #endif
  389:        )
  390:     { fprintf(stderr,"This image is %d bit cell, %d bit char, %d bit address unit %s-endian,\n"
  391: 	      "whereas the machine is %d bit cell, %d bit char, %d bit address unit, %s-endian.\n", 
  392: 	      (1<<((magic7>>1)&3))*8,
  393: 	      (1<<((magic7>>3)&3))*8,
  394: 	      (1<<((magic7>>5)&3))*8,
  395: 	      endianstring[magic7&1],
  396: 	      (1<<cellsize)*8,
  397: 	      (1<<charsize)*8,
  398: 	      (1<<ausize)*8,
  399: 	      endianstring[
  400: #ifdef WORDS_BIGENDIAN
  401: 		      0
  402: #else
  403: 		      1
  404: #endif
  405: 		      ]);
  406:       exit(-2);
  407:     };
  408: 
  409:   fread((void *)&header,sizeof(ImageHeader),1,imagefile);
  410: 
  411:   set_stack_sizes(&header);
  412:   
  413: #if HAVE_GETPAGESIZE
  414:   pagesize=getpagesize(); /* Linux/GNU libc offers this */
  415: #elif HAVE_SYSCONF && defined(_SC_PAGESIZE)
  416:   pagesize=sysconf(_SC_PAGESIZE); /* POSIX.4 */
  417: #elif PAGESIZE
  418:   pagesize=PAGESIZE; /* in limits.h according to Gallmeister's POSIX.4 book */
  419: #endif
  420:   if (debug)
  421:     fprintf(stderr,"pagesize=%ld\n",(unsigned long) pagesize);
  422: 
  423:   image = dict_alloc(preamblesize+dictsize+data_offset)+data_offset;
  424:   rewind(imagefile);  /* fseek(imagefile,0L,SEEK_SET); */
  425:   if (clear_dictionary)
  426:     memset(image, 0, dictsize);
  427:   fread(image, 1, preamblesize+header.image_size, imagefile);
  428:   imp=image+preamblesize;
  429:   if(header.base==0) {
  430:     Cell reloc_size=((header.image_size-1)/sizeof(Cell))/8+1;
  431:     char reloc_bits[reloc_size];
  432:     fread(reloc_bits, 1, reloc_size, imagefile);
  433:     relocate((Cell *)imp, reloc_bits, header.image_size, symbols);
  434: #if 0
  435:     { /* let's see what the relocator did */
  436:       FILE *snapshot=fopen("snapshot.fi","wb");
  437:       fwrite(image,1,imagesize,snapshot);
  438:       fclose(snapshot);
  439:     }
  440: #endif
  441:   }
  442:   else if(header.base!=imp) {
  443:     fprintf(stderr,"%s: Cannot load nonrelocatable image (compiled for address $%lx) at address $%lx\n",
  444: 	    progname, (unsigned long)header.base, (unsigned long)imp);
  445:     exit(1);
  446:   }
  447:   if (header.checksum==0)
  448:     ((ImageHeader *)imp)->checksum=check_sum;
  449:   else if (header.checksum != check_sum) {
  450:     fprintf(stderr,"%s: Checksum of image ($%lx) does not match the executable ($%lx)\n",
  451: 	    progname, (unsigned long)(header.checksum),(unsigned long)check_sum);
  452:     exit(1);
  453:   }
  454:   fclose(imagefile);
  455: 
  456:   alloc_stacks((ImageHeader *)imp);
  457: 
  458:   CACHE_FLUSH(imp, header.image_size);
  459: 
  460:   return imp;
  461: }
  462: 
  463: int onlypath(char *file)
  464: {
  465:   int i;
  466:   i=strlen(file);
  467:   while (i) {
  468:     if (file[i]=='\\' || file[i]=='/') break;
  469:     i--;
  470:   }
  471:   return i;
  472: }
  473: 
  474: FILE *openimage(char *fullfilename)
  475: {
  476:   FILE *image_file;
  477: 
  478:   image_file=fopen(fullfilename,"rb");
  479:   if (image_file!=NULL && debug)
  480:     fprintf(stderr, "Opened image file: %s\n", fullfilename);
  481:   return image_file;
  482: }
  483: 
  484: FILE *checkimage(char *path, int len, char *imagename)
  485: {
  486:   int dirlen=len;
  487:   char fullfilename[dirlen+strlen(imagename)+2];
  488: 
  489:   memcpy(fullfilename, path, dirlen);
  490:   if (fullfilename[dirlen-1]!='/')
  491:     fullfilename[dirlen++]='/';
  492:   strcpy(fullfilename+dirlen,imagename);
  493:   return openimage(fullfilename);
  494: }
  495: 
  496: FILE * open_image_file(char * imagename, char * path)
  497: {
  498:   FILE * image_file=NULL;
  499:   
  500:   if(strchr(imagename, '/')==NULL) {
  501:     /* first check the directory where the exe file is in !! 01may97jaw */
  502:     if (onlypath(progname))
  503:       image_file=checkimage(progname, onlypath(progname), imagename);
  504:     if (!image_file)
  505:       do {
  506: 	char *pend=strchr(path, PATHSEP);
  507: 	if (pend==NULL)
  508: 	  pend=path+strlen(path);
  509: 	if (strlen(path)==0) break;
  510: 	image_file=checkimage(path, pend-path, imagename);
  511: 	path=pend+(*pend==PATHSEP);
  512:       } while (image_file==NULL);
  513:   } else {
  514:     image_file=openimage(imagename);
  515:   }
  516: 
  517:   if (!image_file) {
  518:     fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n",
  519: 	    progname, imagename, path);
  520:     exit(1);
  521:   }
  522: 
  523:   return image_file;
  524: }
  525: #endif
  526: 
  527: #ifdef HAS_OS
  528: UCell convsize(char *s, UCell elemsize)
  529: /* converts s of the format [0-9]+[bekMGT]? (e.g. 25k) into the number
  530:    of bytes.  the letter at the end indicates the unit, where e stands
  531:    for the element size. default is e */
  532: {
  533:   char *endp;
  534:   UCell n,m;
  535: 
  536:   m = elemsize;
  537:   n = strtoul(s,&endp,0);
  538:   if (endp!=NULL) {
  539:     if (strcmp(endp,"b")==0)
  540:       m=1;
  541:     else if (strcmp(endp,"k")==0)
  542:       m=1024;
  543:     else if (strcmp(endp,"M")==0)
  544:       m=1024*1024;
  545:     else if (strcmp(endp,"G")==0)
  546:       m=1024*1024*1024;
  547:     else if (strcmp(endp,"T")==0) {
  548: #if (SIZEOF_CHAR_P > 4)
  549:       m=1024*1024*1024*1024;
  550: #else
  551:       fprintf(stderr,"%s: size specification \"%s\" too large for this machine\n", progname, endp);
  552:       exit(1);
  553: #endif
  554:     } else if (strcmp(endp,"e")!=0 && strcmp(endp,"")!=0) {
  555:       fprintf(stderr,"%s: cannot grok size specification %s: invalid unit \"%s\"\n", progname, s, endp);
  556:       exit(1);
  557:     }
  558:   }
  559:   return n*m;
  560: }
  561: 
  562: void gforth_args(int argc, char ** argv, char ** path, char ** imagename)
  563: {
  564:   int c;
  565: 
  566:   opterr=0;
  567:   while (1) {
  568:     int option_index=0;
  569:     static struct option opts[] = {
  570:       {"image-file", required_argument, NULL, 'i'},
  571:       {"dictionary-size", required_argument, NULL, 'm'},
  572:       {"data-stack-size", required_argument, NULL, 'd'},
  573:       {"return-stack-size", required_argument, NULL, 'r'},
  574:       {"fp-stack-size", required_argument, NULL, 'f'},
  575:       {"locals-stack-size", required_argument, NULL, 'l'},
  576:       {"path", required_argument, NULL, 'p'},
  577:       {"version", no_argument, NULL, 'v'},
  578:       {"help", no_argument, NULL, 'h'},
  579:       /* put something != 0 into offset_image */
  580:       {"offset-image", no_argument, &offset_image, 1},
  581:       {"no-offset-im", no_argument, &offset_image, 0},
  582:       {"clear-dictionary", no_argument, &clear_dictionary, 1},
  583:       {"die-on-signal", no_argument, &die_on_signal, 1},
  584:       {"debug", no_argument, &debug, 1},
  585:       {0,0,0,0}
  586:       /* no-init-file, no-rc? */
  587:     };
  588:     
  589:     c = getopt_long(argc, argv, "+i:m:d:r:f:l:p:vh", opts, &option_index);
  590:     
  591:     if (c==EOF)
  592:       break;
  593:     if (c=='?') {
  594:       optind--;
  595:       break;
  596:     }
  597:     switch (c) {
  598:     case 'i': *imagename = optarg; break;
  599:     case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
  600:     case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
  601:     case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
  602:     case 'f': fsize = convsize(optarg,sizeof(Float)); break;
  603:     case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
  604:     case 'p': *path = optarg; break;
  605:     case 'v': fprintf(stderr, "gforth %s\n", VERSION); exit(0);
  606:     case 'h': 
  607:       fprintf(stderr, "Usage: %s [engine options] [image arguments]\n\
  608: Engine Options:\n\
  609:   --clear-dictionary		    Initialize the dictionary with 0 bytes\n\
  610:   -d SIZE, --data-stack-size=SIZE   Specify data stack size\n\
  611:   --debug			    Print debugging information during startup\n\
  612:   --die-on-signal		    exit instead of CATCHing some signals\n\
  613:   -f SIZE, --fp-stack-size=SIZE	    Specify floating point stack size\n\
  614:   -h, --help			    Print this message and exit\n\
  615:   -i FILE, --image-file=FILE	    Use image FILE instead of `gforth.fi'\n\
  616:   -l SIZE, --locals-stack-size=SIZE Specify locals stack size\n\
  617:   -m SIZE, --dictionary-size=SIZE   Specify Forth dictionary size\n\
  618:   --no-offset-im		    Load image at normal position\n\
  619:   --offset-image		    Load image at a different position\n\
  620:   -p PATH, --path=PATH		    Search path for finding image and sources\n\
  621:   -r SIZE, --return-stack-size=SIZE Specify return stack size\n\
  622:   -v, --version			    Print version and exit\n\
  623: SIZE arguments consist of an integer followed by a unit. The unit can be\n\
  624:   `b' (byte), `e' (element; default), `k' (KB), `M' (MB), `G' (GB) or `T' (TB).\n",
  625: 	      argv[0]);
  626:       optind--;
  627:       return;
  628:       exit(0);
  629:     }
  630:   }
  631: }
  632: #endif
  633: 
  634: #ifdef INCLUDE_IMAGE
  635: extern Cell image[];
  636: extern const char reloc_bits[];
  637: #endif
  638: 
  639: int main(int argc, char **argv, char **env)
  640: {
  641:   char *path = getenv("GFORTHPATH") ? : DEFAULTPATH;
  642: #ifndef INCLUDE_IMAGE
  643:   char *imagename="gforth.fi";
  644:   FILE *image_file;
  645:   Address image;
  646: #endif
  647:   int retvalue;
  648: 	  
  649: #if defined(i386) && defined(ALIGNMENT_CHECK) && !defined(DIRECT_THREADED)
  650:   /* turn on alignment checks on the 486.
  651:    * on the 386 this should have no effect. */
  652:   __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
  653:   /* this is unusable with Linux' libc.4.6.27, because this library is
  654:      not alignment-clean; we would have to replace some library
  655:      functions (e.g., memcpy) to make it work. Also GCC doesn't try to keep
  656:      the stack FP-aligned. */
  657: #endif
  658: 
  659:   /* buffering of the user output device */
  660: #ifdef _IONBF
  661:   if (isatty(fileno(stdout))) {
  662:     fflush(stdout);
  663:     setvbuf(stdout,NULL,_IONBF,0);
  664:   }
  665: #endif
  666: 
  667:   progname = argv[0];
  668: 
  669: #ifdef HAS_OS
  670:   gforth_args(argc, argv, &path, &imagename);
  671: #endif
  672: 
  673: #ifdef INCLUDE_IMAGE
  674:   set_stack_sizes((ImageHeader *)image);
  675:   relocate(image, reloc_bits, ((ImageHeader*)&image)->image_size, (Label*)engine(0, 0, 0, 0, 0));
  676:   alloc_stacks((ImageHeader *)image);
  677: #else
  678:   image_file = open_image_file(imagename, path);
  679:   image = loader(image_file, imagename);
  680: #endif
  681: 
  682:   {
  683:     char path2[strlen(path)+1];
  684:     char *p1, *p2;
  685:     Cell environ[]= {
  686:       (Cell)argc-(optind-1),
  687:       (Cell)(argv+(optind-1)),
  688:       (Cell)strlen(path),
  689:       (Cell)path2};
  690:     argv[optind-1] = progname;
  691:     /*
  692:        for (i=0; i<environ[0]; i++)
  693:        printf("%s\n", ((char **)(environ[1]))[i]);
  694:        */
  695:     /* make path OS-independent by replacing path separators with NUL */
  696:     for (p1=path, p2=path2; *p1!='\0'; p1++, p2++)
  697:       if (*p1==PATHSEP)
  698: 	*p2 = '\0';
  699:       else
  700: 	*p2 = *p1;
  701:     *p2='\0';
  702:     retvalue = go_forth(image, 4, environ);
  703:     deprep_terminal();
  704:   }
  705:   return retvalue;
  706: }

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