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., 59 Temple Place, Suite 330, Boston, MA 02111, 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: Label *vm_prims;
94:
95: #ifdef MEMCMP_AS_SUBROUTINE
96: int gforth_memcmp(const char * s1, const char * s2, size_t n)
97: {
98: return memcmp(s1, s2, n);
99: }
100: #endif
101:
102: /* image file format:
103: * "#! binary-path -i\n" (e.g., "#! /usr/local/bin/gforth-0.4.0 -i\n")
104: * padding to a multiple of 8
105: * magic: "Gforth2x" means format 0.4,
106: * where x is a byte with
107: * bit 7: reserved = 0
108: * bit 6:5: address unit size 2^n octets
109: * bit 4:3: character size 2^n octets
110: * bit 2:1: cell size 2^n octets
111: * bit 0: endian, big=0, little=1.
112: * The magic are always 8 octets, no matter what the native AU/character size is
113: * padding to max alignment (no padding necessary on current machines)
114: * ImageHeader structure (see forth.h)
115: * data (size in ImageHeader.image_size)
116: * tags ((if relocatable, 1 bit/data cell)
117: *
118: * tag==1 means that the corresponding word is an address;
119: * If the word is >=0, the address is within the image;
120: * addresses within the image are given relative to the start of the image.
121: * If the word =-1 (CF_NIL), the address is NIL,
122: * If the word is <CF_NIL and >CF(DODOES), it's a CFA (:, Create, ...)
123: * If the word =CF(DODOES), it's a DOES> CFA
124: * If the word =CF(DOESJUMP), it's a DOES JUMP (2 Cells after DOES>,
125: * possibly containing a jump to dodoes)
126: * If the word is <CF(DOESJUMP), it's a primitive
127: */
128:
129: void relocate(Cell *image, const char *bitstring,
130: int size, int base, Label symbols[])
131: {
132: int i=0, j, k, steps=(size/sizeof(Cell))/RELINFOBITS;
133: Cell token;
134: char bits;
135: Cell max_symbols;
136: /*
137: * A virtial start address that's the real start address minus
138: * the one in the image
139: */
140: Cell *start = (Cell * ) (((void *) image) - ((void *) base));
141:
142:
143: /* printf("relocating to %x[%x] start=%x base=%x\n", image, size, start, base); */
144:
145: for (max_symbols=DOESJUMP+1; symbols[max_symbols]!=0; max_symbols++)
146: ;
147: size/=sizeof(Cell);
148:
149: for(k=0; k<=steps; k++) {
150: for(j=0, bits=bitstring[k]; j<RELINFOBITS; j++, i++, bits<<=1) {
151: /* fprintf(stderr,"relocate: image[%d]\n", i);*/
152: if((i < size) && (bits & (1U << (RELINFOBITS-1)))) {
153: /* fprintf(stderr,"relocate: image[%d]=%d of %d\n", i, image[i], size/sizeof(Cell)); */
154: token=image[i];
155: if(token<0)
156: switch(token)
157: {
158: case CF_NIL : image[i]=0; break;
159: #if !defined(DOUBLY_INDIRECT)
160: case CF(DOCOL) :
161: case CF(DOVAR) :
162: case CF(DOCON) :
163: case CF(DOUSER) :
164: case CF(DODEFER) :
165: case CF(DOFIELD) : MAKE_CF(image+i,symbols[CF(token)]); break;
166: case CF(DOESJUMP): MAKE_DOES_HANDLER(image+i); break;
167: #endif /* !defined(DOUBLY_INDIRECT) */
168: case CF(DODOES) :
169: MAKE_DOES_CF(image+i,(Xt *)(image[i+1]+((Cell)start)));
170: break;
171: default :
172: /* printf("Code field generation image[%x]:=CA(%x)\n",
173: i, CF(image[i])); */
174: if (CF(token)<max_symbols)
175: image[i]=(Cell)CA(CF(token));
176: else
177: fprintf(stderr,"Primitive %d used in this image at $%lx is not implemented by this\n engine (%s); executing this code will crash.\n",CF(token),(long)&image[i],VERSION);
178: }
179: else {
180: // if base is > 0: 0 is a null reference so don't adjust
181: if (token>=base) {
182: image[i]+=(Cell)start;
183: }
184: }
185: }
186: }
187: }
188: ((ImageHeader*)(image))->base = (Address) image;
189: }
190:
191: UCell checksum(Label symbols[])
192: {
193: UCell r=PRIM_VERSION;
194: Cell i;
195:
196: for (i=DOCOL; i<=DOESJUMP; i++) {
197: r ^= (UCell)(symbols[i]);
198: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
199: }
200: #ifdef DIRECT_THREADED
201: /* we have to consider all the primitives */
202: for (; symbols[i]!=(Label)0; i++) {
203: r ^= (UCell)(symbols[i]);
204: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
205: }
206: #else
207: /* in indirect threaded code all primitives are accessed through the
208: symbols table, so we just have to put the base address of symbols
209: in the checksum */
210: r ^= (UCell)symbols;
211: #endif
212: return r;
213: }
214:
215: Address verbose_malloc(Cell size)
216: {
217: Address r;
218: /* leave a little room (64B) for stack underflows */
219: if ((r = malloc(size+64))==NULL) {
220: perror(progname);
221: exit(1);
222: }
223: r = (Address)((((Cell)r)+(sizeof(Float)-1))&(-sizeof(Float)));
224: if (debug)
225: fprintf(stderr, "malloc succeeds, address=$%lx\n", (long)r);
226: return r;
227: }
228:
229: static Address next_address=0;
230: void after_alloc(Address r, Cell size)
231: {
232: if (r != (Address)-1) {
233: if (debug)
234: fprintf(stderr, "success, address=$%lx\n", (long) r);
235: if (pagesize != 1)
236: next_address = (Address)(((((Cell)r)+size-1)&-pagesize)+2*pagesize); /* leave one page unmapped */
237: } else {
238: if (debug)
239: fprintf(stderr, "failed: %s\n", strerror(errno));
240: }
241: }
242:
243: #ifndef MAP_FAILED
244: #define MAP_FAILED ((Address) -1)
245: #endif
246: #ifndef MAP_FILE
247: # define MAP_FILE 0
248: #endif
249: #ifndef MAP_PRIVATE
250: # define MAP_PRIVATE 0
251: #endif
252:
253: #if defined(HAVE_MMAP)
254: static Address alloc_mmap(Cell size)
255: {
256: Address r;
257:
258: #if defined(MAP_ANON)
259: if (debug)
260: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_ANON, ...); ", (long)next_address, (long)size);
261: r = mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
262: #else /* !defined(MAP_ANON) */
263: /* Ultrix (at least) does not define MAP_FILE and MAP_PRIVATE (both are
264: apparently defaults) */
265: static int dev_zero=-1;
266:
267: if (dev_zero == -1)
268: dev_zero = open("/dev/zero", O_RDONLY);
269: if (dev_zero == -1) {
270: r = MAP_FAILED;
271: if (debug)
272: fprintf(stderr, "open(\"/dev/zero\"...) failed (%s), no mmap; ",
273: strerror(errno));
274: } else {
275: if (debug)
276: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FILE, dev_zero, ...); ", (long)next_address, (long)size);
277: r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FILE|MAP_PRIVATE, dev_zero, 0);
278: }
279: #endif /* !defined(MAP_ANON) */
280: after_alloc(r, size);
281: return r;
282: }
283: #endif
284:
285: Address my_alloc(Cell size)
286: {
287: #if HAVE_MMAP
288: Address r;
289:
290: r=alloc_mmap(size);
291: if (r!=MAP_FAILED)
292: return r;
293: #endif /* HAVE_MMAP */
294: /* use malloc as fallback */
295: return verbose_malloc(size);
296: }
297:
298: #if (defined(mips) && !defined(INDIRECT_THREADED))
299: /* the 256MB jump restriction on the MIPS architecture makes the
300: combination of direct threading and mmap unsafe. */
301: #define mips_dict_alloc 1
302: #define dict_alloc(size) verbose_malloc(size)
303: #else
304: #define dict_alloc(size) my_alloc(size)
305: #endif
306:
307: Address dict_alloc_read(FILE *file, Cell imagesize, Cell dictsize, Cell offset)
308: {
309: Address image = MAP_FAILED;
310:
311: #if defined(HAVE_MMAP) && !defined(mips_dict_alloc)
312: if (offset==0) {
313: image=alloc_mmap(dictsize);
314: if (debug)
315: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FIXED|MAP_FILE, imagefile, 0); ", (long)image, (long)imagesize);
316: image = mmap(image, imagesize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FIXED|MAP_FILE|MAP_PRIVATE, fileno(file), 0);
317: after_alloc(image,dictsize);
318: }
319: #endif /* defined(MAP_ANON) && !defined(mips_dict_alloc) */
320: if (image == MAP_FAILED) {
321: image = dict_alloc(dictsize+offset)+offset;
322: rewind(file); /* fseek(imagefile,0L,SEEK_SET); */
323: fread(image, 1, imagesize, file);
324: }
325: return image;
326: }
327:
328: void set_stack_sizes(ImageHeader * header)
329: {
330: if (dictsize==0)
331: dictsize = header->dict_size;
332: if (dsize==0)
333: dsize = header->data_stack_size;
334: if (rsize==0)
335: rsize = header->return_stack_size;
336: if (fsize==0)
337: fsize = header->fp_stack_size;
338: if (lsize==0)
339: lsize = header->locals_stack_size;
340: dictsize=maxaligned(dictsize);
341: dsize=maxaligned(dsize);
342: rsize=maxaligned(rsize);
343: lsize=maxaligned(lsize);
344: fsize=maxaligned(fsize);
345: }
346:
347: void alloc_stacks(ImageHeader * header)
348: {
349: header->dict_size=dictsize;
350: header->data_stack_size=dsize;
351: header->fp_stack_size=fsize;
352: header->return_stack_size=rsize;
353: header->locals_stack_size=lsize;
354:
355: header->data_stack_base=my_alloc(dsize);
356: header->fp_stack_base=my_alloc(fsize);
357: header->return_stack_base=my_alloc(rsize);
358: header->locals_stack_base=my_alloc(lsize);
359: }
360:
361: #warning You can ignore the warnings about clobbered variables in go_forth
362: int go_forth(Address image, int stack, Cell *entries)
363: {
364: volatile ImageHeader *image_header = (ImageHeader *)image;
365: Cell *sp0=(Cell*)(image_header->data_stack_base + dsize);
366: Cell *rp0=(Cell *)(image_header->return_stack_base + rsize);
367: Float *fp0=(Float *)(image_header->fp_stack_base + fsize);
368: #ifdef GFORTH_DEBUGGING
369: volatile Cell *orig_rp0=rp0;
370: #endif
371: Address lp0=image_header->locals_stack_base + lsize;
372: Xt *ip0=(Xt *)(image_header->boot_entry);
373: #ifdef SYSSIGNALS
374: int throw_code;
375: #endif
376:
377: /* ensure that the cached elements (if any) are accessible */
378: IF_spTOS(sp0--);
379: IF_fpTOS(fp0--);
380:
381: for(;stack>0;stack--)
382: *--sp0=entries[stack-1];
383:
384: #ifdef SYSSIGNALS
385: get_winsize();
386:
387: install_signal_handlers(); /* right place? */
388:
389: if ((throw_code=setjmp(throw_jmp_buf))) {
390: static Cell signal_data_stack[8];
391: static Cell signal_return_stack[8];
392: static Float signal_fp_stack[1];
393:
394: signal_data_stack[7]=throw_code;
395:
396: #ifdef GFORTH_DEBUGGING
397: /* fprintf(stderr,"\nrp=%ld\n",(long)rp); */
398: if (rp <= orig_rp0 && rp > (Cell *)(image_header->return_stack_base+5)) {
399: /* no rstack overflow or underflow */
400: rp0 = rp;
401: *--rp0 = (Cell)ip;
402: }
403: else /* I love non-syntactic ifdefs :-) */
404: #endif
405: rp0 = signal_return_stack+8;
406: /* fprintf(stderr, "rp=$%x\n",rp0);*/
407:
408: return((int)(Cell)engine(image_header->throw_entry, signal_data_stack+7,
409: rp0, signal_fp_stack, 0));
410: }
411: #endif
412:
413: return((int)(Cell)engine(ip0,sp0,rp0,fp0,lp0));
414: }
415:
416:
417: #ifndef INCLUDE_IMAGE
418: void print_sizes(Cell sizebyte)
419: /* print size information */
420: {
421: static char* endianstring[]= { " big","little" };
422:
423: fprintf(stderr,"%s endian, cell=%d bytes, char=%d bytes, au=%d bytes\n",
424: endianstring[sizebyte & 1],
425: 1 << ((sizebyte >> 1) & 3),
426: 1 << ((sizebyte >> 3) & 3),
427: 1 << ((sizebyte >> 5) & 3));
428: }
429:
430: Address loader(FILE *imagefile, char* filename)
431: /* returns the address of the image proper (after the preamble) */
432: {
433: ImageHeader header;
434: Address image;
435: Address imp; /* image+preamble */
436: Char magic[8];
437: char magic7; /* size byte of magic number */
438: Cell preamblesize=0;
439: Cell data_offset = offset_image ? 56*sizeof(Cell) : 0;
440: UCell check_sum;
441: Cell ausize = ((RELINFOBITS == 8) ? 0 :
442: (RELINFOBITS == 16) ? 1 :
443: (RELINFOBITS == 32) ? 2 : 3);
444: Cell charsize = ((sizeof(Char) == 1) ? 0 :
445: (sizeof(Char) == 2) ? 1 :
446: (sizeof(Char) == 4) ? 2 : 3) + ausize;
447: Cell cellsize = ((sizeof(Cell) == 1) ? 0 :
448: (sizeof(Cell) == 2) ? 1 :
449: (sizeof(Cell) == 4) ? 2 : 3) + ausize;
450: Cell sizebyte = (ausize << 5) + (charsize << 3) + (cellsize << 1) +
451: #ifdef WORDS_BIGENDIAN
452: 0
453: #else
454: 1
455: #endif
456: ;
457:
458: vm_prims = engine(0,0,0,0,0);
459: #ifndef DOUBLY_INDIRECT
460: check_sum = checksum(vm_prims);
461: #else /* defined(DOUBLY_INDIRECT) */
462: check_sum = (UCell)vm_prims;
463: #endif /* defined(DOUBLY_INDIRECT) */
464:
465: do {
466: if(fread(magic,sizeof(Char),8,imagefile) < 8) {
467: fprintf(stderr,"%s: image %s doesn't seem to be a Gforth (>=0.4) image.\n",
468: progname, filename);
469: exit(1);
470: }
471: preamblesize+=8;
472: } while(memcmp(magic,"Gforth2",7));
473: magic7 = magic[7];
474: if (debug) {
475: magic[7]='\0';
476: fprintf(stderr,"Magic found: %s ", magic);
477: print_sizes(magic7);
478: }
479:
480: if (magic7 != sizebyte)
481: {
482: fprintf(stderr,"This image is: ");
483: print_sizes(magic7);
484: fprintf(stderr,"whereas the machine is ");
485: print_sizes(sizebyte);
486: exit(-2);
487: };
488:
489: fread((void *)&header,sizeof(ImageHeader),1,imagefile);
490:
491: set_stack_sizes(&header);
492:
493: #if HAVE_GETPAGESIZE
494: pagesize=getpagesize(); /* Linux/GNU libc offers this */
495: #elif HAVE_SYSCONF && defined(_SC_PAGESIZE)
496: pagesize=sysconf(_SC_PAGESIZE); /* POSIX.4 */
497: #elif PAGESIZE
498: pagesize=PAGESIZE; /* in limits.h according to Gallmeister's POSIX.4 book */
499: #endif
500: if (debug)
501: fprintf(stderr,"pagesize=%ld\n",(unsigned long) pagesize);
502:
503: image = dict_alloc_read(imagefile, preamblesize+header.image_size,
504: preamblesize+dictsize, data_offset);
505: imp=image+preamblesize;
506: if (clear_dictionary)
507: memset(imp+header.image_size, 0, dictsize-header.image_size);
508: if(header.base==0 || header.base == 0x100) {
509: Cell reloc_size=((header.image_size-1)/sizeof(Cell))/8+1;
510: char reloc_bits[reloc_size];
511: fseek(imagefile, preamblesize+header.image_size, SEEK_SET);
512: fread(reloc_bits, 1, reloc_size, imagefile);
513: relocate((Cell *)imp, reloc_bits, header.image_size, header.base, vm_prims);
514: #if 0
515: { /* let's see what the relocator did */
516: FILE *snapshot=fopen("snapshot.fi","wb");
517: fwrite(image,1,imagesize,snapshot);
518: fclose(snapshot);
519: }
520: #endif
521: }
522: else if(header.base!=imp) {
523: fprintf(stderr,"%s: Cannot load nonrelocatable image (compiled for address $%lx) at address $%lx\n",
524: progname, (unsigned long)header.base, (unsigned long)imp);
525: exit(1);
526: }
527: if (header.checksum==0)
528: ((ImageHeader *)imp)->checksum=check_sum;
529: else if (header.checksum != check_sum) {
530: fprintf(stderr,"%s: Checksum of image ($%lx) does not match the executable ($%lx)\n",
531: progname, (unsigned long)(header.checksum),(unsigned long)check_sum);
532: exit(1);
533: }
534: fclose(imagefile);
535:
536: alloc_stacks((ImageHeader *)imp);
537:
538: CACHE_FLUSH(imp, header.image_size);
539:
540: return imp;
541: }
542:
543: /* index of last '/' or '\' in file, 0 if there is none. !! Hmm, could
544: be implemented with strrchr and the separator should be
545: OS-dependent */
546: int onlypath(char *file)
547: {
548: int i;
549: i=strlen(file);
550: while (i) {
551: if (file[i]=='\\' || file[i]=='/') break;
552: i--;
553: }
554: return i;
555: }
556:
557: FILE *openimage(char *fullfilename)
558: {
559: FILE *image_file;
560: char * expfilename = tilde_cstr(fullfilename, strlen(fullfilename), 1);
561:
562: image_file=fopen(expfilename,"rb");
563: if (image_file!=NULL && debug)
564: fprintf(stderr, "Opened image file: %s\n", expfilename);
565: return image_file;
566: }
567:
568: /* try to open image file concat(path[0:len],imagename) */
569: FILE *checkimage(char *path, int len, char *imagename)
570: {
571: int dirlen=len;
572: char fullfilename[dirlen+strlen(imagename)+2];
573:
574: memcpy(fullfilename, path, dirlen);
575: if (fullfilename[dirlen-1]!='/')
576: fullfilename[dirlen++]='/';
577: strcpy(fullfilename+dirlen,imagename);
578: return openimage(fullfilename);
579: }
580:
581: FILE * open_image_file(char * imagename, char * path)
582: {
583: FILE * image_file=NULL;
584: char *origpath=path;
585:
586: if(strchr(imagename, '/')==NULL) {
587: /* first check the directory where the exe file is in !! 01may97jaw */
588: if (onlypath(progname))
589: image_file=checkimage(progname, onlypath(progname), imagename);
590: if (!image_file)
591: do {
592: char *pend=strchr(path, PATHSEP);
593: if (pend==NULL)
594: pend=path+strlen(path);
595: if (strlen(path)==0) break;
596: image_file=checkimage(path, pend-path, imagename);
597: path=pend+(*pend==PATHSEP);
598: } while (image_file==NULL);
599: } else {
600: image_file=openimage(imagename);
601: }
602:
603: if (!image_file) {
604: fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n",
605: progname, imagename, origpath);
606: exit(1);
607: }
608:
609: return image_file;
610: }
611: #endif
612:
613: #ifdef HAS_OS
614: UCell convsize(char *s, UCell elemsize)
615: /* converts s of the format [0-9]+[bekMGT]? (e.g. 25k) into the number
616: of bytes. the letter at the end indicates the unit, where e stands
617: for the element size. default is e */
618: {
619: char *endp;
620: UCell n,m;
621:
622: m = elemsize;
623: n = strtoul(s,&endp,0);
624: if (endp!=NULL) {
625: if (strcmp(endp,"b")==0)
626: m=1;
627: else if (strcmp(endp,"k")==0)
628: m=1024;
629: else if (strcmp(endp,"M")==0)
630: m=1024*1024;
631: else if (strcmp(endp,"G")==0)
632: m=1024*1024*1024;
633: else if (strcmp(endp,"T")==0) {
634: #if (SIZEOF_CHAR_P > 4)
635: m=1024L*1024*1024*1024;
636: #else
637: fprintf(stderr,"%s: size specification \"%s\" too large for this machine\n", progname, endp);
638: exit(1);
639: #endif
640: } else if (strcmp(endp,"e")!=0 && strcmp(endp,"")!=0) {
641: fprintf(stderr,"%s: cannot grok size specification %s: invalid unit \"%s\"\n", progname, s, endp);
642: exit(1);
643: }
644: }
645: return n*m;
646: }
647:
648: void gforth_args(int argc, char ** argv, char ** path, char ** imagename)
649: {
650: int c;
651:
652: opterr=0;
653: while (1) {
654: int option_index=0;
655: static struct option opts[] = {
656: {"appl-image", required_argument, NULL, 'a'},
657: {"image-file", required_argument, NULL, 'i'},
658: {"dictionary-size", required_argument, NULL, 'm'},
659: {"data-stack-size", required_argument, NULL, 'd'},
660: {"return-stack-size", required_argument, NULL, 'r'},
661: {"fp-stack-size", required_argument, NULL, 'f'},
662: {"locals-stack-size", required_argument, NULL, 'l'},
663: {"path", required_argument, NULL, 'p'},
664: {"version", no_argument, NULL, 'v'},
665: {"help", no_argument, NULL, 'h'},
666: /* put something != 0 into offset_image */
667: {"offset-image", no_argument, &offset_image, 1},
668: {"no-offset-im", no_argument, &offset_image, 0},
669: {"clear-dictionary", no_argument, &clear_dictionary, 1},
670: {"die-on-signal", no_argument, &die_on_signal, 1},
671: {"debug", no_argument, &debug, 1},
672: {0,0,0,0}
673: /* no-init-file, no-rc? */
674: };
675:
676: c = getopt_long(argc, argv, "+i:m:d:r:f:l:p:vhoncsx", opts, &option_index);
677:
678: switch (c) {
679: case EOF: return;
680: case '?': optind--; return;
681: case 'a': *imagename = optarg; return;
682: case 'i': *imagename = optarg; break;
683: case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
684: case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
685: case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
686: case 'f': fsize = convsize(optarg,sizeof(Float)); break;
687: case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
688: case 'p': *path = optarg; break;
689: case 'o': offset_image = 1; break;
690: case 'n': offset_image = 0; break;
691: case 'c': clear_dictionary = 1; break;
692: case 's': die_on_signal = 1; break;
693: case 'x': debug = 1; break;
694: case 'v': fprintf(stderr, "gforth %s\n", VERSION); exit(0);
695: case 'h':
696: fprintf(stderr, "Usage: %s [engine options] ['--'] [image arguments]\n\
697: Engine Options:\n\
698: --appl-image FILE equivalent to '--image-file=FILE --'\n\
699: --clear-dictionary Initialize the dictionary with 0 bytes\n\
700: -d SIZE, --data-stack-size=SIZE Specify data stack size\n\
701: --debug Print debugging information during startup\n\
702: --die-on-signal exit instead of CATCHing some signals\n\
703: -f SIZE, --fp-stack-size=SIZE Specify floating point stack size\n\
704: -h, --help Print this message and exit\n\
705: -i FILE, --image-file=FILE Use image FILE instead of `gforth.fi'\n\
706: -l SIZE, --locals-stack-size=SIZE Specify locals stack size\n\
707: -m SIZE, --dictionary-size=SIZE Specify Forth dictionary size\n\
708: --no-offset-im Load image at normal position\n\
709: --offset-image Load image at a different position\n\
710: -p PATH, --path=PATH Search path for finding image and sources\n\
711: -r SIZE, --return-stack-size=SIZE Specify return stack size\n\
712: -v, --version Print version and exit\n\
713: SIZE arguments consist of an integer followed by a unit. The unit can be\n\
714: `b' (byte), `e' (element; default), `k' (KB), `M' (MB), `G' (GB) or `T' (TB).\n",
715: argv[0]);
716: optind--;
717: return;
718: }
719: }
720: }
721: #endif
722:
723: #ifdef INCLUDE_IMAGE
724: extern Cell image[];
725: extern const char reloc_bits[];
726: #endif
727:
728: int main(int argc, char **argv, char **env)
729: {
730: #ifdef HAS_OS
731: char *path = getenv("GFORTHPATH") ? : DEFAULTPATH;
732: #else
733: char *path = DEFAULTPATH;
734: #endif
735: #ifndef INCLUDE_IMAGE
736: char *imagename="gforth.fi";
737: FILE *image_file;
738: Address image;
739: #endif
740: int retvalue;
741:
742: #if defined(i386) && defined(ALIGNMENT_CHECK) && !defined(DIRECT_THREADED)
743: /* turn on alignment checks on the 486.
744: * on the 386 this should have no effect. */
745: __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
746: /* this is unusable with Linux' libc.4.6.27, because this library is
747: not alignment-clean; we would have to replace some library
748: functions (e.g., memcpy) to make it work. Also GCC doesn't try to keep
749: the stack FP-aligned. */
750: #endif
751:
752: /* buffering of the user output device */
753: #ifdef _IONBF
754: if (isatty(fileno(stdout))) {
755: fflush(stdout);
756: setvbuf(stdout,NULL,_IONBF,0);
757: }
758: #endif
759:
760: progname = argv[0];
761:
762: #ifdef HAS_OS
763: gforth_args(argc, argv, &path, &imagename);
764: #endif
765:
766: #ifdef INCLUDE_IMAGE
767: set_stack_sizes((ImageHeader *)image);
768: if(((ImageHeader *)image)->base != image)
769: relocate(image, reloc_bits, ((ImageHeader *)image)->image_size,
770: (Label*)engine(0, 0, 0, 0, 0));
771: alloc_stacks((ImageHeader *)image);
772: #else
773: image_file = open_image_file(imagename, path);
774: image = loader(image_file, imagename);
775: #endif
776: gforth_header=(ImageHeader *)image; /* used in SIGSEGV handler */
777:
778: {
779: char path2[strlen(path)+1];
780: char *p1, *p2;
781: Cell environ[]= {
782: (Cell)argc-(optind-1),
783: (Cell)(argv+(optind-1)),
784: (Cell)strlen(path),
785: (Cell)path2};
786: argv[optind-1] = progname;
787: /*
788: for (i=0; i<environ[0]; i++)
789: printf("%s\n", ((char **)(environ[1]))[i]);
790: */
791: /* make path OS-independent by replacing path separators with NUL */
792: for (p1=path, p2=path2; *p1!='\0'; p1++, p2++)
793: if (*p1==PATHSEP)
794: *p2 = '\0';
795: else
796: *p2 = *p1;
797: *p2='\0';
798: retvalue = go_forth(image, 4, environ);
799: #ifdef VM_PROFILING
800: vm_print_profile(stderr);
801: #endif
802: deprep_terminal();
803: }
804: return retvalue;
805: }
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to main.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [gforth] / gforth / engine