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: char *progname;
77: #else
78: char *progname = "gforth";
79: int optind = 1;
80: #endif
81: static int debug=0;
82:
83: /* image file format:
84: * "#! binary-path -i\n" (e.g., "#! /usr/local/bin/gforth-0.4.0 -i\n")
85: * padding to a multiple of 8
86: * magic: "Gforth2x" means format 0.4,
87: * where x is a byte with
88: * bit 7: reserved = 0
89: * bit 6:5: address unit size 2^n octets
90: * bit 4:3: character size 2^n octets
91: * bit 2:1: cell size 2^n octets
92: * bit 0: endian, big=0, little=1.
93: * The magic are always 8 octets, no matter what the native AU/character size is
94: * padding to max alignment (no padding necessary on current machines)
95: * ImageHeader structure (see below)
96: * data (size in ImageHeader.image_size)
97: * tags ((if relocatable, 1 bit/data cell)
98: *
99: * tag==1 means that the corresponding word is an address;
100: * If the word is >=0, the address is within the image;
101: * addresses within the image are given relative to the start of the image.
102: * If the word =-1 (CF_NIL), the address is NIL,
103: * If the word is <CF_NIL and >CF(DODOES), it's a CFA (:, Create, ...)
104: * If the word =CF(DODOES), it's a DOES> CFA
105: * If the word =CF(DOESJUMP), it's a DOES JUMP (2 Cells after DOES>,
106: * possibly containing a jump to dodoes)
107: * If the word is <CF(DOESJUMP), it's a primitive
108: */
109:
110: typedef struct {
111: Address base; /* base address of image (0 if relocatable) */
112: UCell checksum; /* checksum of ca's to protect against some
113: incompatible binary/executable combinations
114: (0 if relocatable) */
115: UCell image_size; /* all sizes in bytes */
116: UCell dict_size;
117: UCell data_stack_size;
118: UCell fp_stack_size;
119: UCell return_stack_size;
120: UCell locals_stack_size;
121: Xt *boot_entry; /* initial ip for booting (in BOOT) */
122: Xt *throw_entry; /* ip after signal (in THROW) */
123: Cell unused1; /* possibly tib stack size */
124: Cell unused2;
125: Address data_stack_base; /* this and the following fields are initialized by the loader */
126: Address fp_stack_base;
127: Address return_stack_base;
128: Address locals_stack_base;
129: } ImageHeader;
130: /* the image-header is created in main.fs */
131:
132: void relocate(Cell *image, const char *bitstring, int size, Label symbols[])
133: {
134: int i=0, j, k, steps=(size/sizeof(Cell))/RELINFOBITS;
135: Cell token;
136: char bits;
137: /* static char bits[8]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01};*/
138:
139: /* printf("relocating %x[%x]\n", image, size); */
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(bits & (1U << (RELINFOBITS-1))) {
145: /* fprintf(stderr,"relocate: image[%d]=%d\n", i, image[i]);*/
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,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: image[i]=(Cell)CA(CF(token));
166: }
167: else
168: image[i]+=(Cell)image;
169: }
170: }
171: ((ImageHeader*)(image))->base = image;
172: }
173:
174: UCell checksum(Label symbols[])
175: {
176: UCell r=PRIM_VERSION;
177: Cell i;
178:
179: for (i=DOCOL; i<=DOESJUMP; i++) {
180: r ^= (UCell)(symbols[i]);
181: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
182: }
183: #ifdef DIRECT_THREADED
184: /* we have to consider all the primitives */
185: for (; symbols[i]!=(Label)0; i++) {
186: r ^= (UCell)(symbols[i]);
187: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
188: }
189: #else
190: /* in indirect threaded code all primitives are accessed through the
191: symbols table, so we just have to put the base address of symbols
192: in the checksum */
193: r ^= (UCell)symbols;
194: #endif
195: return r;
196: }
197:
198: Address verbose_malloc(Cell size)
199: {
200: Address r;
201: /* leave a little room (64B) for stack underflows */
202: if ((r = malloc(size+64))==NULL) {
203: perror(progname);
204: exit(1);
205: }
206: r = (Address)((((Cell)r)+(sizeof(Float)-1))&(-sizeof(Float)));
207: if (debug)
208: fprintf(stderr, "malloc succeeds, address=$%lx\n", (long)r);
209: return r;
210: }
211:
212: Address my_alloc(Cell size)
213: {
214: #if HAVE_MMAP
215: static Address next_address=0;
216: Address r;
217:
218: #if defined(MAP_ANON)
219: if (debug)
220: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_ANON, ...); ", (long)next_address, (long)size);
221: r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
222: #else /* !defined(MAP_ANON) */
223: /* Ultrix (at least) does not define MAP_FILE and MAP_PRIVATE (both are
224: apparently defaults) */
225: #ifndef MAP_FILE
226: # define MAP_FILE 0
227: #endif
228: #ifndef MAP_PRIVATE
229: # define MAP_PRIVATE 0
230: #endif
231: static int dev_zero=-1;
232:
233: if (dev_zero == -1)
234: dev_zero = open("/dev/zero", O_RDONLY);
235: if (dev_zero == -1) {
236: r = (Address)-1;
237: if (debug)
238: fprintf(stderr, "open(\"/dev/zero\"...) failed (%s), no mmap; ",
239: strerror(errno));
240: } else {
241: if (debug)
242: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FILE, dev_zero, ...); ", (long)next_address, (long)size);
243: r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FILE|MAP_PRIVATE, dev_zero, 0);
244: }
245: #endif /* !defined(MAP_ANON) */
246:
247: if (r != (Address)-1) {
248: if (debug)
249: fprintf(stderr, "success, address=$%lx\n", (long) r);
250: if (pagesize != 0)
251: next_address = (Address)(((((Cell)r)+size-1)&-pagesize)+2*pagesize); /* leave one page unmapped */
252: return r;
253: }
254: if (debug)
255: fprintf(stderr, "failed: %s\n", strerror(errno));
256: #endif /* HAVE_MMAP */
257: /* use malloc as fallback */
258: return verbose_malloc(size);
259: }
260:
261: #if (defined(mips) && !defined(INDIRECT_THREADED))
262: /* the 256MB jump restriction on the MIPS architecture makes the
263: combination of direct threading and mmap unsafe. */
264: #define dict_alloc(size) verbose_malloc(size)
265: #else
266: #define dict_alloc(size) my_alloc(size)
267: #endif
268:
269: void set_stack_sizes(ImageHeader * header)
270: {
271: if (dictsize==0)
272: dictsize = header->dict_size;
273: if (dsize==0)
274: dsize = header->data_stack_size;
275: if (rsize==0)
276: rsize = header->return_stack_size;
277: if (fsize==0)
278: fsize = header->fp_stack_size;
279: if (lsize==0)
280: lsize = header->locals_stack_size;
281: dictsize=maxaligned(dictsize);
282: dsize=maxaligned(dsize);
283: rsize=maxaligned(rsize);
284: lsize=maxaligned(lsize);
285: fsize=maxaligned(fsize);
286: }
287:
288: void alloc_stacks(ImageHeader * header)
289: {
290: header->dict_size=dictsize;
291: header->data_stack_size=dsize;
292: header->fp_stack_size=fsize;
293: header->return_stack_size=rsize;
294: header->locals_stack_size=lsize;
295:
296: header->data_stack_base=my_alloc(dsize);
297: header->fp_stack_base=my_alloc(fsize);
298: header->return_stack_base=my_alloc(rsize);
299: header->locals_stack_base=my_alloc(lsize);
300: }
301:
302: int go_forth(Address image, int stack, Cell *entries)
303: {
304: ImageHeader *image_header = (ImageHeader *)image;
305: Cell *sp0=(Cell*)(image_header->data_stack_base + dsize);
306: Float *fp0=(Float *)(image_header->fp_stack_base + fsize);
307: Cell *rp0=(Cell *)(image_header->return_stack_base + rsize);
308: Address lp0=image_header->locals_stack_base + lsize;
309: Xt *ip0=(Xt *)(image_header->boot_entry);
310: #ifdef SYSSIGNALS
311: int throw_code;
312: #endif
313:
314: /* ensure that the cached elements (if any) are accessible */
315: IF_TOS(sp0--);
316: IF_FTOS(fp0--);
317:
318: for(;stack>0;stack--)
319: *--sp0=entries[stack-1];
320:
321: get_winsize();
322:
323: #ifdef SYSSIGNALS
324: install_signal_handlers(); /* right place? */
325:
326: if ((throw_code=setjmp(throw_jmp_buf))) {
327: static Cell signal_data_stack[8];
328: static Cell signal_return_stack[8];
329: static Float signal_fp_stack[1];
330:
331: signal_data_stack[7]=throw_code;
332:
333: #ifdef GFORTH_DEBUGGING
334: if (rp <= rp0 && rp > (Cell *)(image_header->return_stack_base+5)) {
335: /* no rstack overflow or underflow */
336: rp0 = rp;
337: *--rp0 = ip;
338: }
339: else /* I love non-syntactic ifdefs :-) */
340: #endif
341: rp0 = signal_return_stack+8;
342:
343: return((int)engine(image_header->throw_entry, signal_data_stack+7,
344: rp0, signal_fp_stack, 0));
345: }
346: #endif
347:
348: return((int)engine(ip0,sp0,rp0,fp0,lp0));
349: }
350:
351:
352: void print_sizes(Cell sizebyte)
353: /* print size information */
354: {
355: static char* endianstring[]= { " big","little" };
356:
357: fprintf(stderr,"%s endian, cell=%d bytes, char=%d bytes, au=%d bytes\n",
358: endianstring[sizebyte & 1],
359: 1 << ((sizebyte >> 1) & 3),
360: 1 << ((sizebyte >> 3) & 3),
361: 1 << ((sizebyte >> 5) & 3));
362: }
363:
364: #ifndef INCLUDE_IMAGE
365: Address loader(FILE *imagefile, char* filename)
366: /* returns the address of the image proper (after the preamble) */
367: {
368: ImageHeader header;
369: Address image;
370: Address imp; /* image+preamble */
371: Char magic[8];
372: char magic7; /* size byte of magic number */
373: Cell preamblesize=0;
374: Label *symbols = engine(0,0,0,0,0);
375: Cell data_offset = offset_image ? 56*sizeof(Cell) : 0;
376: UCell check_sum;
377: Cell ausize = ((RELINFOBITS == 8) ? 0 :
378: (RELINFOBITS == 16) ? 1 :
379: (RELINFOBITS == 32) ? 2 : 3);
380: Cell charsize = ((sizeof(Char) == 1) ? 0 :
381: (sizeof(Char) == 2) ? 1 :
382: (sizeof(Char) == 4) ? 2 : 3) + ausize;
383: Cell cellsize = ((sizeof(Cell) == 1) ? 0 :
384: (sizeof(Cell) == 2) ? 1 :
385: (sizeof(Cell) == 4) ? 2 : 3) + ausize;
386: Cell sizebyte = (ausize << 5) + (charsize << 3) + (cellsize << 1) +
387: #ifdef WORDS_BIGENDIAN
388: 0
389: #else
390: 1
391: #endif
392: ;
393:
394: #ifndef DOUBLY_INDIRECT
395: check_sum = checksum(symbols);
396: #else /* defined(DOUBLY_INDIRECT) */
397: check_sum = (UCell)symbols;
398: #endif /* defined(DOUBLY_INDIRECT) */
399:
400: do {
401: if(fread(magic,sizeof(Char),8,imagefile) < 8) {
402: fprintf(stderr,"%s: image %s doesn't seem to be a Gforth (>=0.4) image.\n",
403: progname, filename);
404: exit(1);
405: }
406: preamblesize+=8;
407: } while(memcmp(magic,"Gforth2",7));
408: magic7 = magic[7];
409: if (debug) {
410: magic[7]='\0';
411: fprintf(stderr,"Magic found: %s ", magic);
412: print_sizes(magic7);
413: }
414:
415: if (magic7 != sizebyte)
416: {
417: fprintf(stderr,"This image is: ");
418: print_sizes(magic7);
419: fprintf(stderr,"whereas the machine is ");
420: print_sizes(sizebyte);
421: exit(-2);
422: };
423:
424: fread((void *)&header,sizeof(ImageHeader),1,imagefile);
425:
426: set_stack_sizes(&header);
427:
428: #if HAVE_GETPAGESIZE
429: pagesize=getpagesize(); /* Linux/GNU libc offers this */
430: #elif HAVE_SYSCONF && defined(_SC_PAGESIZE)
431: pagesize=sysconf(_SC_PAGESIZE); /* POSIX.4 */
432: #elif PAGESIZE
433: pagesize=PAGESIZE; /* in limits.h according to Gallmeister's POSIX.4 book */
434: #endif
435: if (debug)
436: fprintf(stderr,"pagesize=%ld\n",(unsigned long) pagesize);
437:
438: image = dict_alloc(preamblesize+dictsize+data_offset)+data_offset;
439: rewind(imagefile); /* fseek(imagefile,0L,SEEK_SET); */
440: if (clear_dictionary)
441: memset(image, 0, dictsize);
442: fread(image, 1, preamblesize+header.image_size, imagefile);
443: imp=image+preamblesize;
444: if(header.base==0) {
445: Cell reloc_size=((header.image_size-1)/sizeof(Cell))/8+1;
446: char reloc_bits[reloc_size];
447: fread(reloc_bits, 1, reloc_size, imagefile);
448: relocate((Cell *)imp, reloc_bits, header.image_size, symbols);
449: #if 0
450: { /* let's see what the relocator did */
451: FILE *snapshot=fopen("snapshot.fi","wb");
452: fwrite(image,1,imagesize,snapshot);
453: fclose(snapshot);
454: }
455: #endif
456: }
457: else if(header.base!=imp) {
458: fprintf(stderr,"%s: Cannot load nonrelocatable image (compiled for address $%lx) at address $%lx\n",
459: progname, (unsigned long)header.base, (unsigned long)imp);
460: exit(1);
461: }
462: if (header.checksum==0)
463: ((ImageHeader *)imp)->checksum=check_sum;
464: else if (header.checksum != check_sum) {
465: fprintf(stderr,"%s: Checksum of image ($%lx) does not match the executable ($%lx)\n",
466: progname, (unsigned long)(header.checksum),(unsigned long)check_sum);
467: exit(1);
468: }
469: fclose(imagefile);
470:
471: alloc_stacks((ImageHeader *)imp);
472:
473: CACHE_FLUSH(imp, header.image_size);
474:
475: return imp;
476: }
477:
478: int onlypath(char *file)
479: {
480: int i;
481: i=strlen(file);
482: while (i) {
483: if (file[i]=='\\' || file[i]=='/') break;
484: i--;
485: }
486: return i;
487: }
488:
489: FILE *openimage(char *fullfilename)
490: {
491: FILE *image_file;
492:
493: image_file=fopen(fullfilename,"rb");
494: if (image_file!=NULL && debug)
495: fprintf(stderr, "Opened image file: %s\n", fullfilename);
496: return image_file;
497: }
498:
499: FILE *checkimage(char *path, int len, char *imagename)
500: {
501: int dirlen=len;
502: char fullfilename[dirlen+strlen(imagename)+2];
503:
504: memcpy(fullfilename, path, dirlen);
505: if (fullfilename[dirlen-1]!='/')
506: fullfilename[dirlen++]='/';
507: strcpy(fullfilename+dirlen,imagename);
508: return openimage(fullfilename);
509: }
510:
511: FILE * open_image_file(char * imagename, char * path)
512: {
513: FILE * image_file=NULL;
514:
515: if(strchr(imagename, '/')==NULL) {
516: /* first check the directory where the exe file is in !! 01may97jaw */
517: if (onlypath(progname))
518: image_file=checkimage(progname, onlypath(progname), imagename);
519: if (!image_file)
520: do {
521: char *pend=strchr(path, PATHSEP);
522: if (pend==NULL)
523: pend=path+strlen(path);
524: if (strlen(path)==0) break;
525: image_file=checkimage(path, pend-path, imagename);
526: path=pend+(*pend==PATHSEP);
527: } while (image_file==NULL);
528: } else {
529: image_file=openimage(imagename);
530: }
531:
532: if (!image_file) {
533: fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n",
534: progname, imagename, path);
535: exit(1);
536: }
537:
538: return image_file;
539: }
540: #endif
541:
542: #ifdef HAS_OS
543: UCell convsize(char *s, UCell elemsize)
544: /* converts s of the format [0-9]+[bekMGT]? (e.g. 25k) into the number
545: of bytes. the letter at the end indicates the unit, where e stands
546: for the element size. default is e */
547: {
548: char *endp;
549: UCell n,m;
550:
551: m = elemsize;
552: n = strtoul(s,&endp,0);
553: if (endp!=NULL) {
554: if (strcmp(endp,"b")==0)
555: m=1;
556: else if (strcmp(endp,"k")==0)
557: m=1024;
558: else if (strcmp(endp,"M")==0)
559: m=1024*1024;
560: else if (strcmp(endp,"G")==0)
561: m=1024*1024*1024;
562: else if (strcmp(endp,"T")==0) {
563: #if (SIZEOF_CHAR_P > 4)
564: m=1024*1024*1024*1024;
565: #else
566: fprintf(stderr,"%s: size specification \"%s\" too large for this machine\n", progname, endp);
567: exit(1);
568: #endif
569: } else if (strcmp(endp,"e")!=0 && strcmp(endp,"")!=0) {
570: fprintf(stderr,"%s: cannot grok size specification %s: invalid unit \"%s\"\n", progname, s, endp);
571: exit(1);
572: }
573: }
574: return n*m;
575: }
576:
577: void gforth_args(int argc, char ** argv, char ** path, char ** imagename)
578: {
579: int c;
580:
581: opterr=0;
582: while (1) {
583: int option_index=0;
584: static struct option opts[] = {
585: {"image-file", required_argument, NULL, 'i'},
586: {"dictionary-size", required_argument, NULL, 'm'},
587: {"data-stack-size", required_argument, NULL, 'd'},
588: {"return-stack-size", required_argument, NULL, 'r'},
589: {"fp-stack-size", required_argument, NULL, 'f'},
590: {"locals-stack-size", required_argument, NULL, 'l'},
591: {"path", required_argument, NULL, 'p'},
592: {"version", no_argument, NULL, 'v'},
593: {"help", no_argument, NULL, 'h'},
594: /* put something != 0 into offset_image */
595: {"offset-image", no_argument, &offset_image, 1},
596: {"no-offset-im", no_argument, &offset_image, 0},
597: {"clear-dictionary", no_argument, &clear_dictionary, 1},
598: {"die-on-signal", no_argument, &die_on_signal, 1},
599: {"debug", no_argument, &debug, 1},
600: {0,0,0,0}
601: /* no-init-file, no-rc? */
602: };
603:
604: c = getopt_long(argc, argv, "+i:m:d:r:f:l:p:vh", opts, &option_index);
605:
606: if (c==EOF)
607: break;
608: if (c=='?') {
609: optind--;
610: break;
611: }
612: switch (c) {
613: case 'i': *imagename = optarg; break;
614: case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
615: case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
616: case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
617: case 'f': fsize = convsize(optarg,sizeof(Float)); break;
618: case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
619: case 'p': *path = optarg; break;
620: case 'v': fprintf(stderr, "gforth %s\n", VERSION); exit(0);
621: case 'h':
622: fprintf(stderr, "Usage: %s [engine options] [image arguments]\n\
623: Engine Options:\n\
624: --clear-dictionary Initialize the dictionary with 0 bytes\n\
625: -d SIZE, --data-stack-size=SIZE Specify data stack size\n\
626: --debug Print debugging information during startup\n\
627: --die-on-signal exit instead of CATCHing some signals\n\
628: -f SIZE, --fp-stack-size=SIZE Specify floating point stack size\n\
629: -h, --help Print this message and exit\n\
630: -i FILE, --image-file=FILE Use image FILE instead of `gforth.fi'\n\
631: -l SIZE, --locals-stack-size=SIZE Specify locals stack size\n\
632: -m SIZE, --dictionary-size=SIZE Specify Forth dictionary size\n\
633: --no-offset-im Load image at normal position\n\
634: --offset-image Load image at a different position\n\
635: -p PATH, --path=PATH Search path for finding image and sources\n\
636: -r SIZE, --return-stack-size=SIZE Specify return stack size\n\
637: -v, --version Print version and exit\n\
638: SIZE arguments consist of an integer followed by a unit. The unit can be\n\
639: `b' (byte), `e' (element; default), `k' (KB), `M' (MB), `G' (GB) or `T' (TB).\n",
640: argv[0]);
641: optind--;
642: return;
643: exit(0);
644: }
645: }
646: }
647: #endif
648:
649: #ifdef INCLUDE_IMAGE
650: extern Cell image[];
651: extern const char reloc_bits[];
652: #endif
653:
654: int main(int argc, char **argv, char **env)
655: {
656: char *path = getenv("GFORTHPATH") ? : DEFAULTPATH;
657: #ifndef INCLUDE_IMAGE
658: char *imagename="gforth.fi";
659: FILE *image_file;
660: Address image;
661: #endif
662: int retvalue;
663:
664: #if defined(i386) && defined(ALIGNMENT_CHECK) && !defined(DIRECT_THREADED)
665: /* turn on alignment checks on the 486.
666: * on the 386 this should have no effect. */
667: __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
668: /* this is unusable with Linux' libc.4.6.27, because this library is
669: not alignment-clean; we would have to replace some library
670: functions (e.g., memcpy) to make it work. Also GCC doesn't try to keep
671: the stack FP-aligned. */
672: #endif
673:
674: /* buffering of the user output device */
675: #ifdef _IONBF
676: if (isatty(fileno(stdout))) {
677: fflush(stdout);
678: setvbuf(stdout,NULL,_IONBF,0);
679: }
680: #endif
681:
682: progname = argv[0];
683:
684: #ifdef HAS_OS
685: gforth_args(argc, argv, &path, &imagename);
686: #endif
687:
688: #ifdef INCLUDE_IMAGE
689: set_stack_sizes((ImageHeader *)image);
690: if(((ImageHeader *)image)->base != image)
691: relocate(image, reloc_bits, ((ImageHeader *)image)->image_size,
692: (Label*)engine(0, 0, 0, 0, 0));
693: alloc_stacks((ImageHeader *)image);
694: #else
695: image_file = open_image_file(imagename, path);
696: image = loader(image_file, imagename);
697: #endif
698:
699: {
700: char path2[strlen(path)+1];
701: char *p1, *p2;
702: Cell environ[]= {
703: (Cell)argc-(optind-1),
704: (Cell)(argv+(optind-1)),
705: (Cell)strlen(path),
706: (Cell)path2};
707: argv[optind-1] = progname;
708: /*
709: for (i=0; i<environ[0]; i++)
710: printf("%s\n", ((char **)(environ[1]))[i]);
711: */
712: /* make path OS-independent by replacing path separators with NUL */
713: for (p1=path, p2=path2; *p1!='\0'; p1++, p2++)
714: if (*p1==PATHSEP)
715: *p2 = '\0';
716: else
717: *p2 = *p1;
718: *p2='\0';
719: retvalue = go_forth(image, 4, environ);
720: deprep_terminal();
721: }
722: return retvalue;
723: }
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