1: /* command line interpretation, image loading etc. for Gforth
2:
3:
4: Copyright (C) 1995,1996,1997,1998,2000 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: #ifndef STANDALONE
32: #include <sys/stat.h>
33: #endif
34: #include <fcntl.h>
35: #include <assert.h>
36: #include <stdlib.h>
37: #ifndef STANDALONE
38: #if HAVE_SYS_MMAN_H
39: #include <sys/mman.h>
40: #endif
41: #endif
42: #include "forth.h"
43: #include "io.h"
44: #include "getopt.h"
45: #ifdef STANDALONE
46: #include <systypes.h>
47: #endif
48:
49: #define PRIM_VERSION 1
50: /* increment this whenever the primitives change in an incompatible way */
51:
52: #ifndef DEFAULTPATH
53: # define DEFAULTPATH "."
54: #endif
55:
56: #ifdef MSDOS
57: jmp_buf throw_jmp_buf;
58: #endif
59:
60: #if defined(DIRECT_THREADED)
61: # define CA(n) (symbols[(n)])
62: #else
63: # define CA(n) ((Cell)(symbols+(n)))
64: #endif
65:
66: #define maxaligned(n) (typeof(n))((((Cell)n)+sizeof(Float)-1)&-sizeof(Float))
67:
68: static UCell dictsize=0;
69: static UCell dsize=0;
70: static UCell rsize=0;
71: static UCell fsize=0;
72: static UCell lsize=0;
73: int offset_image=0;
74: int die_on_signal=0;
75: #ifndef INCLUDE_IMAGE
76: static int clear_dictionary=0;
77: UCell pagesize=1;
78: char *progname;
79: #else
80: char *progname = "gforth";
81: int optind = 1;
82: #endif
83:
84: #ifdef HAS_DEBUG
85: static int debug=0;
86: #else
87: # define debug 0
88: # define perror(x...)
89: # define fprintf(x...)
90: #endif
91:
92: ImageHeader *gforth_header;
93:
94: #ifdef MEMCMP_AS_SUBROUTINE
95: int gforth_memcmp(const char * s1, const char * s2, size_t n)
96: {
97: return memcmp(s1, s2, n);
98: }
99: #endif
100:
101: /* image file format:
102: * "#! binary-path -i\n" (e.g., "#! /usr/local/bin/gforth-0.4.0 -i\n")
103: * padding to a multiple of 8
104: * magic: "Gforth2x" means format 0.4,
105: * where x is a byte with
106: * bit 7: reserved = 0
107: * bit 6:5: address unit size 2^n octets
108: * bit 4:3: character size 2^n octets
109: * bit 2:1: cell size 2^n octets
110: * bit 0: endian, big=0, little=1.
111: * The magic are always 8 octets, no matter what the native AU/character size is
112: * padding to max alignment (no padding necessary on current machines)
113: * ImageHeader structure (see forth.h)
114: * data (size in ImageHeader.image_size)
115: * tags ((if relocatable, 1 bit/data cell)
116: *
117: * tag==1 means that the corresponding word is an address;
118: * If the word is >=0, the address is within the image;
119: * addresses within the image are given relative to the start of the image.
120: * If the word =-1 (CF_NIL), the address is NIL,
121: * If the word is <CF_NIL and >CF(DODOES), it's a CFA (:, Create, ...)
122: * If the word =CF(DODOES), it's a DOES> CFA
123: * If the word =CF(DOESJUMP), it's a DOES JUMP (2 Cells after DOES>,
124: * possibly containing a jump to dodoes)
125: * If the word is <CF(DOESJUMP), it's a primitive
126: */
127:
128: void relocate(Cell *image, const char *bitstring, int size, Label symbols[])
129: {
130: int i=0, j, k, steps=(size/sizeof(Cell))/RELINFOBITS;
131: Cell token;
132: char bits;
133: Cell max_symbols;
134:
135: /* printf("relocating %x[%x]\n", image, size); */
136:
137: for (max_symbols=DOESJUMP+1; symbols[max_symbols]!=0; max_symbols++)
138: ;
139: size/=sizeof(Cell);
140:
141: for(k=0; k<=steps; k++) {
142: for(j=0, bits=bitstring[k]; j<RELINFOBITS; j++, i++, bits<<=1) {
143: /* fprintf(stderr,"relocate: image[%d]\n", i);*/
144: if((i < size) && (bits & (1U << (RELINFOBITS-1)))) {
145: /* fprintf(stderr,"relocate: image[%d]=%d of %d\n", i, image[i], size/sizeof(Cell)); */
146: if((token=image[i])<0)
147: switch(token)
148: {
149: case CF_NIL : image[i]=0; break;
150: #if !defined(DOUBLY_INDIRECT)
151: case CF(DOCOL) :
152: case CF(DOVAR) :
153: case CF(DOCON) :
154: case CF(DOUSER) :
155: case CF(DODEFER) :
156: case CF(DOFIELD) : MAKE_CF(image+i,symbols[CF(token)]); break;
157: case CF(DOESJUMP): MAKE_DOES_HANDLER(image+i); break;
158: #endif /* !defined(DOUBLY_INDIRECT) */
159: case CF(DODOES) :
160: MAKE_DOES_CF(image+i,(Xt *)(image[i+1]+((Cell)image)));
161: break;
162: default :
163: /* printf("Code field generation image[%x]:=CA(%x)\n",
164: i, CF(image[i])); */
165: if (CF(token)<max_symbols)
166: image[i]=(Cell)CA(CF(token));
167: else
168: fprintf(stderr,"Primitive %d used in this image at $%lx is not implemented by this\n engine (%s); executing this code will crash.\n",CF(token),(long)&image[i],VERSION);
169: }
170: else
171: image[i]+=(Cell)image;
172: }
173: }
174: }
175: ((ImageHeader*)(image))->base = (Address) image;
176: }
177:
178: UCell checksum(Label symbols[])
179: {
180: UCell r=PRIM_VERSION;
181: Cell i;
182:
183: for (i=DOCOL; i<=DOESJUMP; i++) {
184: r ^= (UCell)(symbols[i]);
185: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
186: }
187: #ifdef DIRECT_THREADED
188: /* we have to consider all the primitives */
189: for (; symbols[i]!=(Label)0; i++) {
190: r ^= (UCell)(symbols[i]);
191: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
192: }
193: #else
194: /* in indirect threaded code all primitives are accessed through the
195: symbols table, so we just have to put the base address of symbols
196: in the checksum */
197: r ^= (UCell)symbols;
198: #endif
199: return r;
200: }
201:
202: Address verbose_malloc(Cell size)
203: {
204: Address r;
205: /* leave a little room (64B) for stack underflows */
206: if ((r = malloc(size+64))==NULL) {
207: perror(progname);
208: exit(1);
209: }
210: r = (Address)((((Cell)r)+(sizeof(Float)-1))&(-sizeof(Float)));
211: if (debug)
212: fprintf(stderr, "malloc succeeds, address=$%lx\n", (long)r);
213: return r;
214: }
215:
216: static Address next_address=0;
217: void after_alloc(Address r, Cell size)
218: {
219: if (r != (Address)-1) {
220: if (debug)
221: fprintf(stderr, "success, address=$%lx\n", (long) r);
222: if (pagesize != 1)
223: next_address = (Address)(((((Cell)r)+size-1)&-pagesize)+2*pagesize); /* leave one page unmapped */
224: } else {
225: if (debug)
226: fprintf(stderr, "failed: %s\n", strerror(errno));
227: }
228: }
229:
230: #ifndef MAP_FAILED
231: #define MAP_FAILED ((Address) -1)
232: #endif
233: #ifndef MAP_FILE
234: # define MAP_FILE 0
235: #endif
236: #ifndef MAP_PRIVATE
237: # define MAP_PRIVATE 0
238: #endif
239:
240: #if defined(HAVE_MMAP)
241: static Address alloc_mmap(Cell size)
242: {
243: Address r;
244:
245: #if defined(MAP_ANON)
246: if (debug)
247: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_ANON, ...); ", (long)next_address, (long)size);
248: r = mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
249: #else /* !defined(MAP_ANON) */
250: /* Ultrix (at least) does not define MAP_FILE and MAP_PRIVATE (both are
251: apparently defaults) */
252: static int dev_zero=-1;
253:
254: if (dev_zero == -1)
255: dev_zero = open("/dev/zero", O_RDONLY);
256: if (dev_zero == -1) {
257: r = MAP_FAILED;
258: if (debug)
259: fprintf(stderr, "open(\"/dev/zero\"...) failed (%s), no mmap; ",
260: strerror(errno));
261: } else {
262: if (debug)
263: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FILE, dev_zero, ...); ", (long)next_address, (long)size);
264: r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FILE|MAP_PRIVATE, dev_zero, 0);
265: }
266: #endif /* !defined(MAP_ANON) */
267: after_alloc(r, size);
268: return r;
269: }
270: #endif
271:
272: Address my_alloc(Cell size)
273: {
274: #if HAVE_MMAP
275: Address r;
276:
277: r=alloc_mmap(size);
278: if (r!=MAP_FAILED)
279: return r;
280: #endif /* HAVE_MMAP */
281: /* use malloc as fallback */
282: return verbose_malloc(size);
283: }
284:
285: #if (defined(mips) && !defined(INDIRECT_THREADED))
286: /* the 256MB jump restriction on the MIPS architecture makes the
287: combination of direct threading and mmap unsafe. */
288: #define mips_dict_alloc 1
289: #define dict_alloc(size) verbose_malloc(size)
290: #else
291: #define dict_alloc(size) my_alloc(size)
292: #endif
293:
294: Address dict_alloc_read(FILE *file, Cell imagesize, Cell dictsize, Cell offset)
295: {
296: Address image = MAP_FAILED;
297:
298: #if defined(HAVE_MMAP) && !defined(mips_dict_alloc)
299: if (offset==0) {
300: image=alloc_mmap(dictsize);
301: if (debug)
302: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FIXED|MAP_FILE, imagefile, 0); ", (long)image, (long)imagesize);
303: image = mmap(image, imagesize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FIXED|MAP_FILE|MAP_PRIVATE, fileno(file), 0);
304: after_alloc(image,dictsize);
305: }
306: #endif /* defined(MAP_ANON) && !defined(mips_dict_alloc) */
307: if (image == MAP_FAILED) {
308: image = dict_alloc(dictsize+offset)+offset;
309: rewind(file); /* fseek(imagefile,0L,SEEK_SET); */
310: fread(image, 1, imagesize, file);
311: }
312: return image;
313: }
314:
315: void set_stack_sizes(ImageHeader * header)
316: {
317: if (dictsize==0)
318: dictsize = header->dict_size;
319: if (dsize==0)
320: dsize = header->data_stack_size;
321: if (rsize==0)
322: rsize = header->return_stack_size;
323: if (fsize==0)
324: fsize = header->fp_stack_size;
325: if (lsize==0)
326: lsize = header->locals_stack_size;
327: dictsize=maxaligned(dictsize);
328: dsize=maxaligned(dsize);
329: rsize=maxaligned(rsize);
330: lsize=maxaligned(lsize);
331: fsize=maxaligned(fsize);
332: }
333:
334: void alloc_stacks(ImageHeader * header)
335: {
336: header->dict_size=dictsize;
337: header->data_stack_size=dsize;
338: header->fp_stack_size=fsize;
339: header->return_stack_size=rsize;
340: header->locals_stack_size=lsize;
341:
342: header->data_stack_base=my_alloc(dsize);
343: header->fp_stack_base=my_alloc(fsize);
344: header->return_stack_base=my_alloc(rsize);
345: header->locals_stack_base=my_alloc(lsize);
346: }
347:
348: int go_forth(Address image, int stack, Cell *entries)
349: {
350: volatile ImageHeader *image_header = (ImageHeader *)image;
351: Cell *sp0=(Cell*)(image_header->data_stack_base + dsize);
352: Float *fp0=(Float *)(image_header->fp_stack_base + fsize);
353: Cell *rp0=(Cell *)(image_header->return_stack_base + rsize);
354: volatile Cell *orig_rp0=rp0;
355: Address lp0=image_header->locals_stack_base + lsize;
356: Xt *ip0=(Xt *)(image_header->boot_entry);
357: #ifdef SYSSIGNALS
358: int throw_code;
359: #endif
360:
361: /* ensure that the cached elements (if any) are accessible */
362: IF_TOS(sp0--);
363: IF_FTOS(fp0--);
364:
365: for(;stack>0;stack--)
366: *--sp0=entries[stack-1];
367:
368: #ifdef SYSSIGNALS
369: get_winsize();
370:
371: install_signal_handlers(); /* right place? */
372:
373: if ((throw_code=setjmp(throw_jmp_buf))) {
374: static Cell signal_data_stack[8];
375: static Cell signal_return_stack[8];
376: static Float signal_fp_stack[1];
377:
378: signal_data_stack[7]=throw_code;
379:
380: #ifdef GFORTH_DEBUGGING
381: /* fprintf(stderr,"\nrp=%ld\n",(long)rp); */
382: if (rp <= orig_rp0 && rp > (Cell *)(image_header->return_stack_base+5)) {
383: /* no rstack overflow or underflow */
384: rp0 = rp;
385: *--rp0 = (Cell)ip;
386: }
387: else /* I love non-syntactic ifdefs :-) */
388: #endif
389: rp0 = signal_return_stack+8;
390: /* fprintf(stderr, "rp=$%x\n",rp0);*/
391:
392: return((int)(Cell)engine(image_header->throw_entry, signal_data_stack+7,
393: rp0, signal_fp_stack, 0));
394: }
395: #endif
396:
397: return((int)(Cell)engine(ip0,sp0,rp0,fp0,lp0));
398: }
399:
400:
401: #ifndef INCLUDE_IMAGE
402: void print_sizes(Cell sizebyte)
403: /* print size information */
404: {
405: static char* endianstring[]= { " big","little" };
406:
407: fprintf(stderr,"%s endian, cell=%d bytes, char=%d bytes, au=%d bytes\n",
408: endianstring[sizebyte & 1],
409: 1 << ((sizebyte >> 1) & 3),
410: 1 << ((sizebyte >> 3) & 3),
411: 1 << ((sizebyte >> 5) & 3));
412: }
413:
414: Address loader(FILE *imagefile, char* filename)
415: /* returns the address of the image proper (after the preamble) */
416: {
417: ImageHeader header;
418: Address image;
419: Address imp; /* image+preamble */
420: Char magic[8];
421: char magic7; /* size byte of magic number */
422: Cell preamblesize=0;
423: Label *symbols = engine(0,0,0,0,0);
424: Cell data_offset = offset_image ? 56*sizeof(Cell) : 0;
425: UCell check_sum;
426: Cell ausize = ((RELINFOBITS == 8) ? 0 :
427: (RELINFOBITS == 16) ? 1 :
428: (RELINFOBITS == 32) ? 2 : 3);
429: Cell charsize = ((sizeof(Char) == 1) ? 0 :
430: (sizeof(Char) == 2) ? 1 :
431: (sizeof(Char) == 4) ? 2 : 3) + ausize;
432: Cell cellsize = ((sizeof(Cell) == 1) ? 0 :
433: (sizeof(Cell) == 2) ? 1 :
434: (sizeof(Cell) == 4) ? 2 : 3) + ausize;
435: Cell sizebyte = (ausize << 5) + (charsize << 3) + (cellsize << 1) +
436: #ifdef WORDS_BIGENDIAN
437: 0
438: #else
439: 1
440: #endif
441: ;
442:
443: #ifndef DOUBLY_INDIRECT
444: check_sum = checksum(symbols);
445: #else /* defined(DOUBLY_INDIRECT) */
446: check_sum = (UCell)symbols;
447: #endif /* defined(DOUBLY_INDIRECT) */
448:
449: do {
450: if(fread(magic,sizeof(Char),8,imagefile) < 8) {
451: fprintf(stderr,"%s: image %s doesn't seem to be a Gforth (>=0.4) image.\n",
452: progname, filename);
453: exit(1);
454: }
455: preamblesize+=8;
456: } while(memcmp(magic,"Gforth2",7));
457: magic7 = magic[7];
458: if (debug) {
459: magic[7]='\0';
460: fprintf(stderr,"Magic found: %s ", magic);
461: print_sizes(magic7);
462: }
463:
464: if (magic7 != sizebyte)
465: {
466: fprintf(stderr,"This image is: ");
467: print_sizes(magic7);
468: fprintf(stderr,"whereas the machine is ");
469: print_sizes(sizebyte);
470: exit(-2);
471: };
472:
473: fread((void *)&header,sizeof(ImageHeader),1,imagefile);
474:
475: set_stack_sizes(&header);
476:
477: #if HAVE_GETPAGESIZE
478: pagesize=getpagesize(); /* Linux/GNU libc offers this */
479: #elif HAVE_SYSCONF && defined(_SC_PAGESIZE)
480: pagesize=sysconf(_SC_PAGESIZE); /* POSIX.4 */
481: #elif PAGESIZE
482: pagesize=PAGESIZE; /* in limits.h according to Gallmeister's POSIX.4 book */
483: #endif
484: if (debug)
485: fprintf(stderr,"pagesize=%ld\n",(unsigned long) pagesize);
486:
487: image = dict_alloc_read(imagefile, preamblesize+header.image_size,
488: preamblesize+dictsize, data_offset);
489: imp=image+preamblesize;
490: if (clear_dictionary)
491: memset(imp+header.image_size, 0, dictsize-header.image_size);
492: if(header.base==0) {
493: Cell reloc_size=((header.image_size-1)/sizeof(Cell))/8+1;
494: char reloc_bits[reloc_size];
495: fseek(imagefile, preamblesize+header.image_size, SEEK_SET);
496: fread(reloc_bits, 1, reloc_size, imagefile);
497: relocate((Cell *)imp, reloc_bits, header.image_size, symbols);
498: #if 0
499: { /* let's see what the relocator did */
500: FILE *snapshot=fopen("snapshot.fi","wb");
501: fwrite(image,1,imagesize,snapshot);
502: fclose(snapshot);
503: }
504: #endif
505: }
506: else if(header.base!=imp) {
507: fprintf(stderr,"%s: Cannot load nonrelocatable image (compiled for address $%lx) at address $%lx\n",
508: progname, (unsigned long)header.base, (unsigned long)imp);
509: exit(1);
510: }
511: if (header.checksum==0)
512: ((ImageHeader *)imp)->checksum=check_sum;
513: else if (header.checksum != check_sum) {
514: fprintf(stderr,"%s: Checksum of image ($%lx) does not match the executable ($%lx)\n",
515: progname, (unsigned long)(header.checksum),(unsigned long)check_sum);
516: exit(1);
517: }
518: fclose(imagefile);
519:
520: alloc_stacks((ImageHeader *)imp);
521:
522: CACHE_FLUSH(imp, header.image_size);
523:
524: return imp;
525: }
526:
527: /* index of last '/' or '\' in file, 0 if there is none. !! Hmm, could
528: be implemented with strrchr and the separator should be
529: OS-dependent */
530: int onlypath(char *file)
531: {
532: int i;
533: i=strlen(file);
534: while (i) {
535: if (file[i]=='\\' || file[i]=='/') break;
536: i--;
537: }
538: return i;
539: }
540:
541: FILE *openimage(char *fullfilename)
542: {
543: FILE *image_file;
544: char * expfilename = tilde_cstr(fullfilename, strlen(fullfilename), 1);
545:
546: image_file=fopen(expfilename,"rb");
547: if (image_file!=NULL && debug)
548: fprintf(stderr, "Opened image file: %s\n", expfilename);
549: return image_file;
550: }
551:
552: /* try to open image file concat(path[0:len],imagename) */
553: FILE *checkimage(char *path, int len, char *imagename)
554: {
555: int dirlen=len;
556: char fullfilename[dirlen+strlen(imagename)+2];
557:
558: memcpy(fullfilename, path, dirlen);
559: if (fullfilename[dirlen-1]!='/')
560: fullfilename[dirlen++]='/';
561: strcpy(fullfilename+dirlen,imagename);
562: return openimage(fullfilename);
563: }
564:
565: FILE * open_image_file(char * imagename, char * path)
566: {
567: FILE * image_file=NULL;
568: char *origpath=path;
569:
570: if(strchr(imagename, '/')==NULL) {
571: /* first check the directory where the exe file is in !! 01may97jaw */
572: if (onlypath(progname))
573: image_file=checkimage(progname, onlypath(progname), imagename);
574: if (!image_file)
575: do {
576: char *pend=strchr(path, PATHSEP);
577: if (pend==NULL)
578: pend=path+strlen(path);
579: if (strlen(path)==0) break;
580: image_file=checkimage(path, pend-path, imagename);
581: path=pend+(*pend==PATHSEP);
582: } while (image_file==NULL);
583: } else {
584: image_file=openimage(imagename);
585: }
586:
587: if (!image_file) {
588: fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n",
589: progname, imagename, origpath);
590: exit(1);
591: }
592:
593: return image_file;
594: }
595: #endif
596:
597: #ifdef HAS_OS
598: UCell convsize(char *s, UCell elemsize)
599: /* converts s of the format [0-9]+[bekMGT]? (e.g. 25k) into the number
600: of bytes. the letter at the end indicates the unit, where e stands
601: for the element size. default is e */
602: {
603: char *endp;
604: UCell n,m;
605:
606: m = elemsize;
607: n = strtoul(s,&endp,0);
608: if (endp!=NULL) {
609: if (strcmp(endp,"b")==0)
610: m=1;
611: else if (strcmp(endp,"k")==0)
612: m=1024;
613: else if (strcmp(endp,"M")==0)
614: m=1024*1024;
615: else if (strcmp(endp,"G")==0)
616: m=1024*1024*1024;
617: else if (strcmp(endp,"T")==0) {
618: #if (SIZEOF_CHAR_P > 4)
619: m=1024L*1024*1024*1024;
620: #else
621: fprintf(stderr,"%s: size specification \"%s\" too large for this machine\n", progname, endp);
622: exit(1);
623: #endif
624: } else if (strcmp(endp,"e")!=0 && strcmp(endp,"")!=0) {
625: fprintf(stderr,"%s: cannot grok size specification %s: invalid unit \"%s\"\n", progname, s, endp);
626: exit(1);
627: }
628: }
629: return n*m;
630: }
631:
632: void gforth_args(int argc, char ** argv, char ** path, char ** imagename)
633: {
634: int c;
635:
636: opterr=0;
637: while (1) {
638: int option_index=0;
639: static struct option opts[] = {
640: {"appl-image", required_argument, NULL, 'a'},
641: {"image-file", required_argument, NULL, 'i'},
642: {"dictionary-size", required_argument, NULL, 'm'},
643: {"data-stack-size", required_argument, NULL, 'd'},
644: {"return-stack-size", required_argument, NULL, 'r'},
645: {"fp-stack-size", required_argument, NULL, 'f'},
646: {"locals-stack-size", required_argument, NULL, 'l'},
647: {"path", required_argument, NULL, 'p'},
648: {"version", no_argument, NULL, 'v'},
649: {"help", no_argument, NULL, 'h'},
650: /* put something != 0 into offset_image */
651: {"offset-image", no_argument, &offset_image, 1},
652: {"no-offset-im", no_argument, &offset_image, 0},
653: {"clear-dictionary", no_argument, &clear_dictionary, 1},
654: {"die-on-signal", no_argument, &die_on_signal, 1},
655: {"debug", no_argument, &debug, 1},
656: {0,0,0,0}
657: /* no-init-file, no-rc? */
658: };
659:
660: c = getopt_long(argc, argv, "+i:m:d:r:f:l:p:vhoncsx", opts, &option_index);
661:
662: switch (c) {
663: case EOF: return;
664: case '?': optind--; return;
665: case 'a': *imagename = optarg; return;
666: case 'i': *imagename = optarg; break;
667: case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
668: case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
669: case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
670: case 'f': fsize = convsize(optarg,sizeof(Float)); break;
671: case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
672: case 'p': *path = optarg; break;
673: case 'o': offset_image = 1; break;
674: case 'n': offset_image = 0; break;
675: case 'c': clear_dictionary = 1; break;
676: case 's': die_on_signal = 1; break;
677: case 'x': debug = 1; break;
678: case 'v': fprintf(stderr, "gforth %s\n", VERSION); exit(0);
679: case 'h':
680: fprintf(stderr, "Usage: %s [engine options] ['--'] [image arguments]\n\
681: Engine Options:\n\
682: --appl-image FILE equivalent to '--image-file=FILE --'\n\
683: --clear-dictionary Initialize the dictionary with 0 bytes\n\
684: -d SIZE, --data-stack-size=SIZE Specify data stack size\n\
685: --debug Print debugging information during startup\n\
686: --die-on-signal exit instead of CATCHing some signals\n\
687: -f SIZE, --fp-stack-size=SIZE Specify floating point stack size\n\
688: -h, --help Print this message and exit\n\
689: -i FILE, --image-file=FILE Use image FILE instead of `gforth.fi'\n\
690: -l SIZE, --locals-stack-size=SIZE Specify locals stack size\n\
691: -m SIZE, --dictionary-size=SIZE Specify Forth dictionary size\n\
692: --no-offset-im Load image at normal position\n\
693: --offset-image Load image at a different position\n\
694: -p PATH, --path=PATH Search path for finding image and sources\n\
695: -r SIZE, --return-stack-size=SIZE Specify return stack size\n\
696: -v, --version Print version and exit\n\
697: SIZE arguments consist of an integer followed by a unit. The unit can be\n\
698: `b' (byte), `e' (element; default), `k' (KB), `M' (MB), `G' (GB) or `T' (TB).\n",
699: argv[0]);
700: optind--;
701: return;
702: }
703: }
704: }
705: #endif
706:
707: #ifdef INCLUDE_IMAGE
708: extern Cell image[];
709: extern const char reloc_bits[];
710: #endif
711:
712: int main(int argc, char **argv, char **env)
713: {
714: #ifdef HAS_OS
715: char *path = getenv("GFORTHPATH") ? : DEFAULTPATH;
716: #else
717: char *path = DEFAULTPATH;
718: #endif
719: #ifndef INCLUDE_IMAGE
720: char *imagename="gforth.fi";
721: FILE *image_file;
722: Address image;
723: #endif
724: int retvalue;
725:
726: #if defined(i386) && defined(ALIGNMENT_CHECK) && !defined(DIRECT_THREADED)
727: /* turn on alignment checks on the 486.
728: * on the 386 this should have no effect. */
729: __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
730: /* this is unusable with Linux' libc.4.6.27, because this library is
731: not alignment-clean; we would have to replace some library
732: functions (e.g., memcpy) to make it work. Also GCC doesn't try to keep
733: the stack FP-aligned. */
734: #endif
735:
736: /* buffering of the user output device */
737: #ifdef _IONBF
738: if (isatty(fileno(stdout))) {
739: fflush(stdout);
740: setvbuf(stdout,NULL,_IONBF,0);
741: }
742: #endif
743:
744: progname = argv[0];
745:
746: #ifdef HAS_OS
747: gforth_args(argc, argv, &path, &imagename);
748: #endif
749:
750: #ifdef INCLUDE_IMAGE
751: set_stack_sizes((ImageHeader *)image);
752: if(((ImageHeader *)image)->base != image)
753: relocate(image, reloc_bits, ((ImageHeader *)image)->image_size,
754: (Label*)engine(0, 0, 0, 0, 0));
755: alloc_stacks((ImageHeader *)image);
756: #else
757: image_file = open_image_file(imagename, path);
758: image = loader(image_file, imagename);
759: #endif
760: gforth_header=(ImageHeader *)image; /* used in SIGSEGV handler */
761:
762: {
763: char path2[strlen(path)+1];
764: char *p1, *p2;
765: Cell environ[]= {
766: (Cell)argc-(optind-1),
767: (Cell)(argv+(optind-1)),
768: (Cell)strlen(path),
769: (Cell)path2};
770: argv[optind-1] = progname;
771: /*
772: for (i=0; i<environ[0]; i++)
773: printf("%s\n", ((char **)(environ[1]))[i]);
774: */
775: /* make path OS-independent by replacing path separators with NUL */
776: for (p1=path, p2=path2; *p1!='\0'; p1++, p2++)
777: if (*p1==PATHSEP)
778: *p2 = '\0';
779: else
780: *p2 = *p1;
781: *p2='\0';
782: retvalue = go_forth(image, 4, environ);
783: deprep_terminal();
784: }
785: return retvalue;
786: }
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