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: UCell pagesize=1;
76: char *progname;
77: #else
78: char *progname = "gforth";
79: int optind = 1;
80: #endif
81: #ifdef HAS_DEBUG
82: static int debug=0;
83: #endif
84: ImageHeader *gforth_header;
85:
86: #ifdef MEMCMP_AS_SUBROUTINE
87: int gforth_memcmp(const char * s1, const char * s2, size_t n)
88: {
89: return memcmp(s1, s2, n);
90: }
91: #endif
92:
93: /* image file format:
94: * "#! binary-path -i\n" (e.g., "#! /usr/local/bin/gforth-0.4.0 -i\n")
95: * padding to a multiple of 8
96: * magic: "Gforth2x" means format 0.4,
97: * where x is a byte with
98: * bit 7: reserved = 0
99: * bit 6:5: address unit size 2^n octets
100: * bit 4:3: character size 2^n octets
101: * bit 2:1: cell size 2^n octets
102: * bit 0: endian, big=0, little=1.
103: * The magic are always 8 octets, no matter what the native AU/character size is
104: * padding to max alignment (no padding necessary on current machines)
105: * ImageHeader structure (see forth.h)
106: * data (size in ImageHeader.image_size)
107: * tags ((if relocatable, 1 bit/data cell)
108: *
109: * tag==1 means that the corresponding word is an address;
110: * If the word is >=0, the address is within the image;
111: * addresses within the image are given relative to the start of the image.
112: * If the word =-1 (CF_NIL), the address is NIL,
113: * If the word is <CF_NIL and >CF(DODOES), it's a CFA (:, Create, ...)
114: * If the word =CF(DODOES), it's a DOES> CFA
115: * If the word =CF(DOESJUMP), it's a DOES JUMP (2 Cells after DOES>,
116: * possibly containing a jump to dodoes)
117: * If the word is <CF(DOESJUMP), it's a primitive
118: */
119:
120: void relocate(Cell *image, const char *bitstring, int size, Label symbols[])
121: {
122: int i=0, j, k, steps=(size/sizeof(Cell))/RELINFOBITS;
123: Cell token;
124: char bits;
125: /* static char bits[8]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01};*/
126:
127: /* printf("relocating %x[%x]\n", image, size); */
128:
129: for(k=0; k<=steps; k++)
130: for(j=0, bits=bitstring[k]; j<RELINFOBITS; j++, i++, bits<<=1) {
131: /* fprintf(stderr,"relocate: image[%d]\n", i);*/
132: if(bits & (1U << (RELINFOBITS-1))) {
133: /* fprintf(stderr,"relocate: image[%d]=%d\n", i, image[i]);*/
134: if((token=image[i])<0)
135: switch(token)
136: {
137: case CF_NIL : image[i]=0; break;
138: #if !defined(DOUBLY_INDIRECT)
139: case CF(DOCOL) :
140: case CF(DOVAR) :
141: case CF(DOCON) :
142: case CF(DOUSER) :
143: case CF(DODEFER) :
144: case CF(DOFIELD) : MAKE_CF(image+i,symbols[CF(token)]); break;
145: case CF(DOESJUMP): MAKE_DOES_HANDLER(image+i); break;
146: #endif /* !defined(DOUBLY_INDIRECT) */
147: case CF(DODOES) :
148: MAKE_DOES_CF(image+i,image[i+1]+((Cell)image));
149: break;
150: default :
151: /* printf("Code field generation image[%x]:=CA(%x)\n",
152: i, CF(image[i])); */
153: image[i]=(Cell)CA(CF(token));
154: }
155: else
156: image[i]+=(Cell)image;
157: }
158: }
159: ((ImageHeader*)(image))->base = (Address) image;
160: }
161:
162: UCell checksum(Label symbols[])
163: {
164: UCell r=PRIM_VERSION;
165: Cell i;
166:
167: for (i=DOCOL; i<=DOESJUMP; i++) {
168: r ^= (UCell)(symbols[i]);
169: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
170: }
171: #ifdef DIRECT_THREADED
172: /* we have to consider all the primitives */
173: for (; symbols[i]!=(Label)0; i++) {
174: r ^= (UCell)(symbols[i]);
175: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
176: }
177: #else
178: /* in indirect threaded code all primitives are accessed through the
179: symbols table, so we just have to put the base address of symbols
180: in the checksum */
181: r ^= (UCell)symbols;
182: #endif
183: return r;
184: }
185:
186: Address verbose_malloc(Cell size)
187: {
188: Address r;
189: /* leave a little room (64B) for stack underflows */
190: if ((r = malloc(size+64))==NULL) {
191: #ifdef HAS_DEBUG
192: perror(progname);
193: #endif
194: exit(1);
195: }
196: r = (Address)((((Cell)r)+(sizeof(Float)-1))&(-sizeof(Float)));
197: #ifdef HAS_DEBUG
198: if (debug)
199: fprintf(stderr, "malloc succeeds, address=$%lx\n", (long)r);
200: #endif
201: return r;
202: }
203:
204: Address my_alloc(Cell size)
205: {
206: #if HAVE_MMAP
207: static Address next_address=0;
208: Address r;
209:
210: #if defined(MAP_ANON)
211: #ifdef HAS_DEBUG
212: if (debug)
213: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_ANON, ...); ", (long)next_address, (long)size);
214: #endif
215: r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
216: #else /* !defined(MAP_ANON) */
217: /* Ultrix (at least) does not define MAP_FILE and MAP_PRIVATE (both are
218: apparently defaults) */
219: #ifndef MAP_FILE
220: # define MAP_FILE 0
221: #endif
222: #ifndef MAP_PRIVATE
223: # define MAP_PRIVATE 0
224: #endif
225: static int dev_zero=-1;
226:
227: if (dev_zero == -1)
228: dev_zero = open("/dev/zero", O_RDONLY);
229: if (dev_zero == -1) {
230: r = (Address)-1;
231: #ifdef HAS_DEBUG
232: if (debug)
233: fprintf(stderr, "open(\"/dev/zero\"...) failed (%s), no mmap; ",
234: strerror(errno));
235: #endif
236: } else {
237: #ifdef HAS_DEBUG
238: if (debug)
239: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FILE, dev_zero, ...); ", (long)next_address, (long)size);
240: #endif
241: r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FILE|MAP_PRIVATE, dev_zero, 0);
242: }
243: #endif /* !defined(MAP_ANON) */
244:
245: if (r != (Address)-1) {
246: #ifdef HAS_DEBUG
247: if (debug)
248: fprintf(stderr, "success, address=$%lx\n", (long) r);
249: #endif
250: if (pagesize != 1)
251: next_address = (Address)(((((Cell)r)+size-1)&-pagesize)+2*pagesize); /* leave one page unmapped */
252: return r;
253: }
254: #ifdef HAS_DEBUG
255: if (debug)
256: fprintf(stderr, "failed: %s\n", strerror(errno));
257: #endif
258: #endif /* HAVE_MMAP */
259: /* use malloc as fallback */
260: return verbose_malloc(size);
261: }
262:
263: #if (defined(mips) && !defined(INDIRECT_THREADED))
264: /* the 256MB jump restriction on the MIPS architecture makes the
265: combination of direct threading and mmap unsafe. */
266: #define dict_alloc(size) verbose_malloc(size)
267: #else
268: #define dict_alloc(size) my_alloc(size)
269: #endif
270:
271: void set_stack_sizes(ImageHeader * header)
272: {
273: if (dictsize==0)
274: dictsize = header->dict_size;
275: if (dsize==0)
276: dsize = header->data_stack_size;
277: if (rsize==0)
278: rsize = header->return_stack_size;
279: if (fsize==0)
280: fsize = header->fp_stack_size;
281: if (lsize==0)
282: lsize = header->locals_stack_size;
283: dictsize=maxaligned(dictsize);
284: dsize=maxaligned(dsize);
285: rsize=maxaligned(rsize);
286: lsize=maxaligned(lsize);
287: fsize=maxaligned(fsize);
288: }
289:
290: void alloc_stacks(ImageHeader * header)
291: {
292: header->dict_size=dictsize;
293: header->data_stack_size=dsize;
294: header->fp_stack_size=fsize;
295: header->return_stack_size=rsize;
296: header->locals_stack_size=lsize;
297:
298: header->data_stack_base=my_alloc(dsize);
299: header->fp_stack_base=my_alloc(fsize);
300: header->return_stack_base=my_alloc(rsize);
301: header->locals_stack_base=my_alloc(lsize);
302: }
303:
304: int go_forth(Address image, int stack, Cell *entries)
305: {
306: ImageHeader *image_header = (ImageHeader *)image;
307: Cell *sp0=(Cell*)(image_header->data_stack_base + dsize);
308: Float *fp0=(Float *)(image_header->fp_stack_base + fsize);
309: Cell *rp0=(Cell *)(image_header->return_stack_base + rsize);
310: Address lp0=image_header->locals_stack_base + lsize;
311: Xt *ip0=(Xt *)(image_header->boot_entry);
312: #ifdef SYSSIGNALS
313: int throw_code;
314: #endif
315:
316: /* ensure that the cached elements (if any) are accessible */
317: IF_TOS(sp0--);
318: IF_FTOS(fp0--);
319:
320: for(;stack>0;stack--)
321: *--sp0=entries[stack-1];
322:
323: #ifdef SYSSIGNALS
324: get_winsize();
325:
326: install_signal_handlers(); /* right place? */
327:
328: if ((throw_code=setjmp(throw_jmp_buf))) {
329: static Cell signal_data_stack[8];
330: static Cell signal_return_stack[8];
331: static Float signal_fp_stack[1];
332:
333: signal_data_stack[7]=throw_code;
334:
335: #ifdef GFORTH_DEBUGGING
336: if (rp <= rp0 && rp > (Cell *)(image_header->return_stack_base+5)) {
337: /* no rstack overflow or underflow */
338: rp0 = rp;
339: *--rp0 = (Cell)ip;
340: }
341: else /* I love non-syntactic ifdefs :-) */
342: #endif
343: rp0 = signal_return_stack+8;
344: /* fprintf(stderr, "rp=$%x\n",rp0);*/
345:
346: return((int)engine(image_header->throw_entry, signal_data_stack+7,
347: rp0, signal_fp_stack, 0));
348: }
349: #endif
350:
351: return((int)engine(ip0,sp0,rp0,fp0,lp0));
352: }
353:
354:
355: #ifndef INCLUDE_IMAGE
356: void print_sizes(Cell sizebyte)
357: /* print size information */
358: {
359: static char* endianstring[]= { " big","little" };
360:
361: fprintf(stderr,"%s endian, cell=%d bytes, char=%d bytes, au=%d bytes\n",
362: endianstring[sizebyte & 1],
363: 1 << ((sizebyte >> 1) & 3),
364: 1 << ((sizebyte >> 3) & 3),
365: 1 << ((sizebyte >> 5) & 3));
366: }
367:
368: Address loader(FILE *imagefile, char* filename)
369: /* returns the address of the image proper (after the preamble) */
370: {
371: ImageHeader header;
372: Address image;
373: Address imp; /* image+preamble */
374: Char magic[8];
375: char magic7; /* size byte of magic number */
376: Cell preamblesize=0;
377: Label *symbols = engine(0,0,0,0,0);
378: Cell data_offset = offset_image ? 56*sizeof(Cell) : 0;
379: UCell check_sum;
380: Cell ausize = ((RELINFOBITS == 8) ? 0 :
381: (RELINFOBITS == 16) ? 1 :
382: (RELINFOBITS == 32) ? 2 : 3);
383: Cell charsize = ((sizeof(Char) == 1) ? 0 :
384: (sizeof(Char) == 2) ? 1 :
385: (sizeof(Char) == 4) ? 2 : 3) + ausize;
386: Cell cellsize = ((sizeof(Cell) == 1) ? 0 :
387: (sizeof(Cell) == 2) ? 1 :
388: (sizeof(Cell) == 4) ? 2 : 3) + ausize;
389: Cell sizebyte = (ausize << 5) + (charsize << 3) + (cellsize << 1) +
390: #ifdef WORDS_BIGENDIAN
391: 0
392: #else
393: 1
394: #endif
395: ;
396:
397: #ifndef DOUBLY_INDIRECT
398: check_sum = checksum(symbols);
399: #else /* defined(DOUBLY_INDIRECT) */
400: check_sum = (UCell)symbols;
401: #endif /* defined(DOUBLY_INDIRECT) */
402:
403: do {
404: if(fread(magic,sizeof(Char),8,imagefile) < 8) {
405: fprintf(stderr,"%s: image %s doesn't seem to be a Gforth (>=0.4) image.\n",
406: progname, filename);
407: exit(1);
408: }
409: preamblesize+=8;
410: } while(memcmp(magic,"Gforth2",7));
411: magic7 = magic[7];
412: #ifdef HAS_DEBUG
413: if (debug) {
414: magic[7]='\0';
415: fprintf(stderr,"Magic found: %s ", magic);
416: print_sizes(magic7);
417: }
418: #endif
419:
420: if (magic7 != sizebyte)
421: {
422: fprintf(stderr,"This image is: ");
423: print_sizes(magic7);
424: fprintf(stderr,"whereas the machine is ");
425: print_sizes(sizebyte);
426: exit(-2);
427: };
428:
429: fread((void *)&header,sizeof(ImageHeader),1,imagefile);
430:
431: set_stack_sizes(&header);
432:
433: #if HAVE_GETPAGESIZE
434: pagesize=getpagesize(); /* Linux/GNU libc offers this */
435: #elif HAVE_SYSCONF && defined(_SC_PAGESIZE)
436: pagesize=sysconf(_SC_PAGESIZE); /* POSIX.4 */
437: #elif PAGESIZE
438: pagesize=PAGESIZE; /* in limits.h according to Gallmeister's POSIX.4 book */
439: #endif
440: #ifdef HAS_DEBUG
441: if (debug)
442: fprintf(stderr,"pagesize=%ld\n",(unsigned long) pagesize);
443: #endif
444:
445: image = dict_alloc(preamblesize+dictsize+data_offset)+data_offset;
446: rewind(imagefile); /* fseek(imagefile,0L,SEEK_SET); */
447: if (clear_dictionary)
448: memset(image, 0, dictsize);
449: fread(image, 1, preamblesize+header.image_size, imagefile);
450: imp=image+preamblesize;
451: if(header.base==0) {
452: Cell reloc_size=((header.image_size-1)/sizeof(Cell))/8+1;
453: char reloc_bits[reloc_size];
454: fread(reloc_bits, 1, reloc_size, imagefile);
455: relocate((Cell *)imp, reloc_bits, header.image_size, symbols);
456: #if 0
457: { /* let's see what the relocator did */
458: FILE *snapshot=fopen("snapshot.fi","wb");
459: fwrite(image,1,imagesize,snapshot);
460: fclose(snapshot);
461: }
462: #endif
463: }
464: else if(header.base!=imp) {
465: fprintf(stderr,"%s: Cannot load nonrelocatable image (compiled for address $%lx) at address $%lx\n",
466: progname, (unsigned long)header.base, (unsigned long)imp);
467: exit(1);
468: }
469: if (header.checksum==0)
470: ((ImageHeader *)imp)->checksum=check_sum;
471: else if (header.checksum != check_sum) {
472: fprintf(stderr,"%s: Checksum of image ($%lx) does not match the executable ($%lx)\n",
473: progname, (unsigned long)(header.checksum),(unsigned long)check_sum);
474: exit(1);
475: }
476: fclose(imagefile);
477:
478: alloc_stacks((ImageHeader *)imp);
479:
480: CACHE_FLUSH(imp, header.image_size);
481:
482: return imp;
483: }
484:
485: /* index of last '/' or '\' in file, 0 if there is none. !! Hmm, could
486: be implemented with strrchr and the separator should be
487: OS-dependent */
488: int onlypath(char *file)
489: {
490: int i;
491: i=strlen(file);
492: while (i) {
493: if (file[i]=='\\' || file[i]=='/') break;
494: i--;
495: }
496: return i;
497: }
498:
499: FILE *openimage(char *fullfilename)
500: {
501: FILE *image_file;
502: char * expfilename = tilde_cstr(fullfilename, strlen(fullfilename), 1);
503:
504: image_file=fopen(expfilename,"rb");
505: #ifdef HAS_DEBUG
506: if (image_file!=NULL && debug)
507: fprintf(stderr, "Opened image file: %s\n", expfilename);
508: #endif
509: return image_file;
510: }
511:
512: /* try to open image file concat(path[0:len],imagename) */
513: FILE *checkimage(char *path, int len, char *imagename)
514: {
515: int dirlen=len;
516: char fullfilename[dirlen+strlen(imagename)+2];
517:
518: memcpy(fullfilename, path, dirlen);
519: if (fullfilename[dirlen-1]!='/')
520: fullfilename[dirlen++]='/';
521: strcpy(fullfilename+dirlen,imagename);
522: return openimage(fullfilename);
523: }
524:
525: FILE * open_image_file(char * imagename, char * path)
526: {
527: FILE * image_file=NULL;
528: char *origpath=path;
529:
530: if(strchr(imagename, '/')==NULL) {
531: /* first check the directory where the exe file is in !! 01may97jaw */
532: if (onlypath(progname))
533: image_file=checkimage(progname, onlypath(progname), imagename);
534: if (!image_file)
535: do {
536: char *pend=strchr(path, PATHSEP);
537: if (pend==NULL)
538: pend=path+strlen(path);
539: if (strlen(path)==0) break;
540: image_file=checkimage(path, pend-path, imagename);
541: path=pend+(*pend==PATHSEP);
542: } while (image_file==NULL);
543: } else {
544: image_file=openimage(imagename);
545: }
546:
547: if (!image_file) {
548: fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n",
549: progname, imagename, origpath);
550: exit(1);
551: }
552:
553: return image_file;
554: }
555: #endif
556:
557: #ifdef HAS_OS
558: UCell convsize(char *s, UCell elemsize)
559: /* converts s of the format [0-9]+[bekMGT]? (e.g. 25k) into the number
560: of bytes. the letter at the end indicates the unit, where e stands
561: for the element size. default is e */
562: {
563: char *endp;
564: UCell n,m;
565:
566: m = elemsize;
567: n = strtoul(s,&endp,0);
568: if (endp!=NULL) {
569: if (strcmp(endp,"b")==0)
570: m=1;
571: else if (strcmp(endp,"k")==0)
572: m=1024;
573: else if (strcmp(endp,"M")==0)
574: m=1024*1024;
575: else if (strcmp(endp,"G")==0)
576: m=1024*1024*1024;
577: else if (strcmp(endp,"T")==0) {
578: #if (SIZEOF_CHAR_P > 4)
579: m=1024L*1024*1024*1024;
580: #else
581: fprintf(stderr,"%s: size specification \"%s\" too large for this machine\n", progname, endp);
582: exit(1);
583: #endif
584: } else if (strcmp(endp,"e")!=0 && strcmp(endp,"")!=0) {
585: fprintf(stderr,"%s: cannot grok size specification %s: invalid unit \"%s\"\n", progname, s, endp);
586: exit(1);
587: }
588: }
589: return n*m;
590: }
591:
592: void gforth_args(int argc, char ** argv, char ** path, char ** imagename)
593: {
594: int c;
595:
596: opterr=0;
597: while (1) {
598: int option_index=0;
599: static struct option opts[] = {
600: {"appl-image", required_argument, NULL, 'a'},
601: {"image-file", required_argument, NULL, 'i'},
602: {"dictionary-size", required_argument, NULL, 'm'},
603: {"data-stack-size", required_argument, NULL, 'd'},
604: {"return-stack-size", required_argument, NULL, 'r'},
605: {"fp-stack-size", required_argument, NULL, 'f'},
606: {"locals-stack-size", required_argument, NULL, 'l'},
607: {"path", required_argument, NULL, 'p'},
608: {"version", no_argument, NULL, 'v'},
609: {"help", no_argument, NULL, 'h'},
610: /* put something != 0 into offset_image */
611: {"offset-image", no_argument, &offset_image, 1},
612: {"no-offset-im", no_argument, &offset_image, 0},
613: {"clear-dictionary", no_argument, &clear_dictionary, 1},
614: {"die-on-signal", no_argument, &die_on_signal, 1},
615: {"debug", no_argument, &debug, 1},
616: {0,0,0,0}
617: /* no-init-file, no-rc? */
618: };
619:
620: c = getopt_long(argc, argv, "+i:m:d:r:f:l:p:vh", opts, &option_index);
621:
622: switch (c) {
623: case EOF: return;
624: case '?': optind--; return;
625: case 'a': *imagename = optarg; return;
626: case 'i': *imagename = optarg; break;
627: case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
628: case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
629: case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
630: case 'f': fsize = convsize(optarg,sizeof(Float)); break;
631: case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
632: case 'p': *path = optarg; break;
633: case 'v': fprintf(stderr, "gforth %s\n", VERSION); exit(0);
634: case 'h':
635: fprintf(stderr, "Usage: %s [engine options] ['--'] [image arguments]\n\
636: Engine Options:\n\
637: --appl-image FILE equivalent to '--image-file=FILE --'\n\
638: --clear-dictionary Initialize the dictionary with 0 bytes\n\
639: -d SIZE, --data-stack-size=SIZE Specify data stack size\n\
640: --debug Print debugging information during startup\n\
641: --die-on-signal exit instead of CATCHing some signals\n\
642: -f SIZE, --fp-stack-size=SIZE Specify floating point stack size\n\
643: -h, --help Print this message and exit\n\
644: -i FILE, --image-file=FILE Use image FILE instead of `gforth.fi'\n\
645: -l SIZE, --locals-stack-size=SIZE Specify locals stack size\n\
646: -m SIZE, --dictionary-size=SIZE Specify Forth dictionary size\n\
647: --no-offset-im Load image at normal position\n\
648: --offset-image Load image at a different position\n\
649: -p PATH, --path=PATH Search path for finding image and sources\n\
650: -r SIZE, --return-stack-size=SIZE Specify return stack size\n\
651: -v, --version Print version and exit\n\
652: SIZE arguments consist of an integer followed by a unit. The unit can be\n\
653: `b' (byte), `e' (element; default), `k' (KB), `M' (MB), `G' (GB) or `T' (TB).\n",
654: argv[0]);
655: optind--;
656: return;
657: }
658: }
659: }
660: #endif
661:
662: #ifdef INCLUDE_IMAGE
663: extern Cell image[];
664: extern const char reloc_bits[];
665: #endif
666:
667: int main(int argc, char **argv, char **env)
668: {
669: #ifdef HAS_OS
670: char *path = getenv("GFORTHPATH") ? : DEFAULTPATH;
671: #else
672: char *path = DEFAULTPATH;
673: #endif
674: #ifndef INCLUDE_IMAGE
675: char *imagename="gforth.fi";
676: FILE *image_file;
677: Address image;
678: #endif
679: int retvalue;
680:
681: #if defined(i386) && defined(ALIGNMENT_CHECK) && !defined(DIRECT_THREADED)
682: /* turn on alignment checks on the 486.
683: * on the 386 this should have no effect. */
684: __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
685: /* this is unusable with Linux' libc.4.6.27, because this library is
686: not alignment-clean; we would have to replace some library
687: functions (e.g., memcpy) to make it work. Also GCC doesn't try to keep
688: the stack FP-aligned. */
689: #endif
690:
691: /* buffering of the user output device */
692: #ifdef _IONBF
693: if (isatty(fileno(stdout))) {
694: fflush(stdout);
695: setvbuf(stdout,NULL,_IONBF,0);
696: }
697: #endif
698:
699: progname = argv[0];
700:
701: #ifdef HAS_OS
702: gforth_args(argc, argv, &path, &imagename);
703: #endif
704:
705: #ifdef INCLUDE_IMAGE
706: set_stack_sizes((ImageHeader *)image);
707: if(((ImageHeader *)image)->base != image)
708: relocate(image, reloc_bits, ((ImageHeader *)image)->image_size,
709: (Label*)engine(0, 0, 0, 0, 0));
710: alloc_stacks((ImageHeader *)image);
711: #else
712: image_file = open_image_file(imagename, path);
713: image = loader(image_file, imagename);
714: #endif
715: gforth_header=(ImageHeader *)image; /* used in SIGSEGV handler */
716:
717: {
718: char path2[strlen(path)+1];
719: char *p1, *p2;
720: Cell environ[]= {
721: (Cell)argc-(optind-1),
722: (Cell)(argv+(optind-1)),
723: (Cell)strlen(path),
724: (Cell)path2};
725: argv[optind-1] = progname;
726: /*
727: for (i=0; i<environ[0]; i++)
728: printf("%s\n", ((char **)(environ[1]))[i]);
729: */
730: /* make path OS-independent by replacing path separators with NUL */
731: for (p1=path, p2=path2; *p1!='\0'; p1++, p2++)
732: if (*p1==PATHSEP)
733: *p2 = '\0';
734: else
735: *p2 = *p1;
736: *p2='\0';
737: retvalue = go_forth(image, 4, environ);
738: deprep_terminal();
739: }
740: return retvalue;
741: }
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