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[gforth] /
gforth /
engine /
main.c
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1.18:
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Fri Jan 8 16:58:31 1999 UTC (25 years, 2 months ago) by
anton
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there is now a debugging version of the engine that maintains ip and
rp in global variables (to allow backtrace on signals). The debugging
engine is called gforth and the original engine is called gforth-fast.
1: /* command line interpretation, image loading etc. for Gforth
2:
3:
4: Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.
5:
6: This file is part of Gforth.
7:
8: Gforth is free software; you can redistribute it and/or
9: modify it under the terms of the GNU General Public License
10: as published by the Free Software Foundation; either version 2
11: of the License, or (at your option) any later version.
12:
13: This program is distributed in the hope that it will be useful,
14: but WITHOUT ANY WARRANTY; without even the implied warranty of
15: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16: GNU General Public License for more details.
17:
18: You should have received a copy of the GNU General Public License
19: along with this program; if not, write to the Free Software
20: Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21: */
22:
23: #include "config.h"
24: #include <errno.h>
25: #include <ctype.h>
26: #include <stdio.h>
27: #include <unistd.h>
28: #include <string.h>
29: #include <math.h>
30: #include <sys/types.h>
31: #include <sys/stat.h>
32: #include <fcntl.h>
33: #include <assert.h>
34: #include <stdlib.h>
35: #ifndef STANDALONE
36: #if HAVE_SYS_MMAN_H
37: #include <sys/mman.h>
38: #endif
39: #endif
40: #include "forth.h"
41: #include "io.h"
42: #include "getopt.h"
43: #ifdef STANDALONE
44: #include <systypes.h>
45: #endif
46:
47: #define PRIM_VERSION 1
48: /* increment this whenever the primitives change in an incompatible way */
49:
50: #ifndef DEFAULTPATH
51: # define DEFAULTPATH "~+"
52: #endif
53:
54: #ifdef MSDOS
55: jmp_buf throw_jmp_buf;
56: #endif
57:
58: #if defined(DIRECT_THREADED)
59: # define CA(n) (symbols[(n)])
60: #else
61: # define CA(n) ((Cell)(symbols+(n)))
62: #endif
63:
64: #define maxaligned(n) (typeof(n))((((Cell)n)+sizeof(Float)-1)&-sizeof(Float))
65:
66: static UCell dictsize=0;
67: static UCell dsize=0;
68: static UCell rsize=0;
69: static UCell fsize=0;
70: static UCell lsize=0;
71: int offset_image=0;
72: int die_on_signal=0;
73: #ifndef INCLUDE_IMAGE
74: static int clear_dictionary=0;
75: static size_t pagesize=0;
76: #endif
77: static int debug=0;
78: char *progname;
79:
80: /* image file format:
81: * "#! binary-path -i\n" (e.g., "#! /usr/local/bin/gforth-0.4.0 -i\n")
82: * padding to a multiple of 8
83: * magic: "Gforth2x" means format 0.4,
84: * where x is a byte with
85: * bit 7: reserved = 0
86: * bit 6:5: address unit size 2^n octets
87: * bit 4:3: character size 2^n octets
88: * bit 2:1: cell size 2^n octets
89: * bit 0: endian, big=0, little=1.
90: * The magic are always 8 octets, no matter what the native AU/character size is
91: * padding to max alignment (no padding necessary on current machines)
92: * ImageHeader structure (see below)
93: * data (size in ImageHeader.image_size)
94: * tags ((if relocatable, 1 bit/data cell)
95: *
96: * tag==1 means that the corresponding word is an address;
97: * If the word is >=0, the address is within the image;
98: * addresses within the image are given relative to the start of the image.
99: * If the word =-1 (CF_NIL), the address is NIL,
100: * If the word is <CF_NIL and >CF(DODOES), it's a CFA (:, Create, ...)
101: * If the word =CF(DODOES), it's a DOES> CFA
102: * If the word =CF(DOESJUMP), it's a DOES JUMP (2 Cells after DOES>,
103: * possibly containing a jump to dodoes)
104: * If the word is <CF(DOESJUMP), it's a primitive
105: */
106:
107: typedef struct {
108: Address base; /* base address of image (0 if relocatable) */
109: UCell checksum; /* checksum of ca's to protect against some
110: incompatible binary/executable combinations
111: (0 if relocatable) */
112: UCell image_size; /* all sizes in bytes */
113: UCell dict_size;
114: UCell data_stack_size;
115: UCell fp_stack_size;
116: UCell return_stack_size;
117: UCell locals_stack_size;
118: Xt *boot_entry; /* initial ip for booting (in BOOT) */
119: Xt *throw_entry; /* ip after signal (in THROW) */
120: Cell unused1; /* possibly tib stack size */
121: Cell unused2;
122: Address data_stack_base; /* this and the following fields are initialized by the loader */
123: Address fp_stack_base;
124: Address return_stack_base;
125: Address locals_stack_base;
126: } ImageHeader;
127: /* the image-header is created in main.fs */
128:
129: void relocate(Cell *image, const char *bitstring, int size, Label symbols[])
130: {
131: int i=0, j, k, steps=(size/sizeof(Cell))/RELINFOBITS;
132: Cell token;
133: char bits;
134: /* static char bits[8]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01};*/
135:
136: /* printf("relocating %x[%x]\n", image, size); */
137:
138: for(k=0; k<=steps; k++)
139: for(j=0, bits=bitstring[k]; j<RELINFOBITS; j++, i++, bits<<=1) {
140: /* fprintf(stderr,"relocate: image[%d]\n", i);*/
141: if(bits & (1U << (RELINFOBITS-1))) {
142: /* fprintf(stderr,"relocate: image[%d]=%d\n", i, image[i]);*/
143: if((token=image[i])<0)
144: switch(token)
145: {
146: case CF_NIL : image[i]=0; break;
147: #if !defined(DOUBLY_INDIRECT)
148: case CF(DOCOL) :
149: case CF(DOVAR) :
150: case CF(DOCON) :
151: case CF(DOUSER) :
152: case CF(DODEFER) :
153: case CF(DOFIELD) : MAKE_CF(image+i,symbols[CF(token)]); break;
154: case CF(DOESJUMP): MAKE_DOES_HANDLER(image+i); break;
155: #endif /* !defined(DOUBLY_INDIRECT) */
156: case CF(DODOES) :
157: MAKE_DOES_CF(image+i,image[i+1]+((Cell)image));
158: break;
159: default :
160: /* printf("Code field generation image[%x]:=CA(%x)\n",
161: i, CF(image[i])); */
162: image[i]=(Cell)CA(CF(token));
163: }
164: else
165: image[i]+=(Cell)image;
166: }
167: }
168: }
169:
170: UCell checksum(Label symbols[])
171: {
172: UCell r=PRIM_VERSION;
173: Cell i;
174:
175: for (i=DOCOL; i<=DOESJUMP; i++) {
176: r ^= (UCell)(symbols[i]);
177: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
178: }
179: #ifdef DIRECT_THREADED
180: /* we have to consider all the primitives */
181: for (; symbols[i]!=(Label)0; i++) {
182: r ^= (UCell)(symbols[i]);
183: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
184: }
185: #else
186: /* in indirect threaded code all primitives are accessed through the
187: symbols table, so we just have to put the base address of symbols
188: in the checksum */
189: r ^= (UCell)symbols;
190: #endif
191: return r;
192: }
193:
194: Address verbose_malloc(Cell size)
195: {
196: Address r;
197: /* leave a little room (64B) for stack underflows */
198: if ((r = malloc(size+64))==NULL) {
199: perror(progname);
200: exit(1);
201: }
202: r = (Address)((((Cell)r)+(sizeof(Float)-1))&(-sizeof(Float)));
203: if (debug)
204: fprintf(stderr, "malloc succeeds, address=$%lx\n", (long)r);
205: return r;
206: }
207:
208: Address my_alloc(Cell size)
209: {
210: #if HAVE_MMAP
211: static Address next_address=0;
212: Address r;
213:
214: #if defined(MAP_ANON)
215: if (debug)
216: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_ANON, ...); ", (long)next_address, (long)size);
217: r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
218: #else /* !defined(MAP_ANON) */
219: /* Ultrix (at least) does not define MAP_FILE and MAP_PRIVATE (both are
220: apparently defaults) */
221: #ifndef MAP_FILE
222: # define MAP_FILE 0
223: #endif
224: #ifndef MAP_PRIVATE
225: # define MAP_PRIVATE 0
226: #endif
227: static int dev_zero=-1;
228:
229: if (dev_zero == -1)
230: dev_zero = open("/dev/zero", O_RDONLY);
231: if (dev_zero == -1) {
232: r = (Address)-1;
233: if (debug)
234: fprintf(stderr, "open(\"/dev/zero\"...) failed (%s), no mmap; ",
235: strerror(errno));
236: } else {
237: if (debug)
238: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FILE, dev_zero, ...); ", (long)next_address, (long)size);
239: r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FILE|MAP_PRIVATE, dev_zero, 0);
240: }
241: #endif /* !defined(MAP_ANON) */
242:
243: if (r != (Address)-1) {
244: if (debug)
245: fprintf(stderr, "success, address=$%lx\n", (long) r);
246: if (pagesize != 0)
247: next_address = (Address)(((((Cell)r)+size-1)&-pagesize)+2*pagesize); /* leave one page unmapped */
248: return r;
249: }
250: if (debug)
251: fprintf(stderr, "failed: %s\n", strerror(errno));
252: #endif /* HAVE_MMAP */
253: /* use malloc as fallback */
254: return verbose_malloc(size);
255: }
256:
257: #if (defined(mips) && !defined(INDIRECT_THREADED))
258: /* the 256MB jump restriction on the MIPS architecture makes the
259: combination of direct threading and mmap unsafe. */
260: #define dict_alloc(size) verbose_malloc(size)
261: #else
262: #define dict_alloc(size) my_alloc(size)
263: #endif
264:
265: void set_stack_sizes(ImageHeader * header)
266: {
267: if (dictsize==0)
268: dictsize = header->dict_size;
269: if (dsize==0)
270: dsize = header->data_stack_size;
271: if (rsize==0)
272: rsize = header->return_stack_size;
273: if (fsize==0)
274: fsize = header->fp_stack_size;
275: if (lsize==0)
276: lsize = header->locals_stack_size;
277: dictsize=maxaligned(dictsize);
278: dsize=maxaligned(dsize);
279: rsize=maxaligned(rsize);
280: lsize=maxaligned(lsize);
281: fsize=maxaligned(fsize);
282: }
283:
284: void alloc_stacks(ImageHeader * header)
285: {
286: header->dict_size=dictsize;
287: header->data_stack_size=dsize;
288: header->fp_stack_size=fsize;
289: header->return_stack_size=rsize;
290: header->locals_stack_size=lsize;
291:
292: header->data_stack_base=my_alloc(dsize);
293: header->fp_stack_base=my_alloc(fsize);
294: header->return_stack_base=my_alloc(rsize);
295: header->locals_stack_base=my_alloc(lsize);
296: }
297:
298: int go_forth(Address image, int stack, Cell *entries)
299: {
300: ImageHeader *image_header = (ImageHeader *)image;
301: Cell *sp0=(Cell*)(image_header->data_stack_base + dsize);
302: Float *fp0=(Float *)(image_header->fp_stack_base + fsize);
303: Cell *rp0=(Cell *)(image_header->return_stack_base + rsize);
304: Address lp0=image_header->locals_stack_base + lsize;
305: Xt *ip0=(Xt *)(image_header->boot_entry);
306: #ifdef SYSSIGNALS
307: int throw_code;
308: #endif
309:
310: /* ensure that the cached elements (if any) are accessible */
311: IF_TOS(sp0--);
312: IF_FTOS(fp0--);
313:
314: for(;stack>0;stack--)
315: *--sp0=entries[stack-1];
316:
317: #if !defined(MSDOS) && !defined(SHARC) && !defined(_WIN32) && !defined(__EMX__)
318: get_winsize();
319: #endif
320:
321: #ifdef SYSSIGNALS
322: install_signal_handlers(); /* right place? */
323:
324: if ((throw_code=setjmp(throw_jmp_buf))) {
325: static Cell signal_data_stack[8];
326: static Cell signal_return_stack[8];
327: static Float signal_fp_stack[1];
328:
329: signal_data_stack[7]=throw_code;
330:
331: #ifdef GFORTH_DEBUGGING
332: if (rp <= rp0 && rp > (Cell *)(image_header->return_stack_base+5)) {
333: /* no rstack overflow or underflow */
334: rp0 = rp;
335: *--rp0 = ip;
336: }
337: else /* I love non-syntactic ifdefs :-) */
338: #endif
339: rp0 = signal_return_stack+8;
340:
341: return((int)engine(image_header->throw_entry, signal_data_stack+7,
342: rp0, signal_fp_stack, 0));
343: }
344: #endif
345:
346: return((int)engine(ip0,sp0,rp0,fp0,lp0));
347: }
348:
349: #ifndef INCLUDE_IMAGE
350: Address loader(FILE *imagefile, char* filename)
351: /* returns the address of the image proper (after the preamble) */
352: {
353: ImageHeader header;
354: Address image;
355: Address imp; /* image+preamble */
356: Char magic[8];
357: char magic7; /* size byte of magic number */
358: Cell preamblesize=0;
359: Label *symbols = engine(0,0,0,0,0);
360: Cell data_offset = offset_image ? 56*sizeof(Cell) : 0;
361: UCell check_sum;
362: static char* endianstring[]= { "big","little" };
363: Cell ausize = ((RELINFOBITS == 8) ? 0 :
364: (RELINFOBITS == 16) ? 1 :
365: (RELINFOBITS == 32) ? 2 : 3);
366: Cell charsize = ((sizeof(Char) == 1) ? 0 :
367: (sizeof(Char) == 2) ? 1 :
368: (sizeof(Char) == 4) ? 2 : 3) + ausize;
369: Cell cellsize = ((sizeof(Cell) == 1) ? 0 :
370: (sizeof(Cell) == 2) ? 1 :
371: (sizeof(Cell) == 4) ? 2 : 3) + ausize;
372:
373:
374: #ifndef DOUBLY_INDIRECT
375: check_sum = checksum(symbols);
376: #else /* defined(DOUBLY_INDIRECT) */
377: check_sum = (UCell)symbols;
378: #endif /* defined(DOUBLY_INDIRECT) */
379:
380: do {
381: if(fread(magic,sizeof(Char),8,imagefile) < 8) {
382: fprintf(stderr,"%s: image %s doesn't seem to be a Gforth (>=0.4) image.\n",
383: progname, filename);
384: exit(1);
385: }
386: preamblesize+=8;
387: } while(memcmp(magic,"Gforth2",7));
388: magic7 = magic[7];
389: if (debug) {
390: magic[7]='\0';
391: fprintf(stderr,"Magic found: %s $%x\n", magic, magic7);
392: }
393:
394: if(magic7 != (ausize << 5) + (charsize << 3) + (cellsize << 1) +
395: #ifdef WORDS_BIGENDIAN
396: 0
397: #else
398: 1
399: #endif
400: )
401: { fprintf(stderr,"This image is %d bit cell, %d bit char, %d bit address unit %s-endian,\n"
402: "whereas the machine is %d bit cell, %d bit char, %d bit address unit, %s-endian.\n",
403: (1<<((magic7>>1)&3))*8,
404: (1<<((magic7>>3)&3))*8,
405: (1<<((magic7>>5)&3))*8,
406: endianstring[magic7&1],
407: (1<<cellsize)*8,
408: (1<<charsize)*8,
409: (1<<ausize)*8,
410: endianstring[
411: #ifdef WORDS_BIGENDIAN
412: 0
413: #else
414: 1
415: #endif
416: ]);
417: exit(-2);
418: };
419:
420: fread((void *)&header,sizeof(ImageHeader),1,imagefile);
421:
422: set_stack_sizes(&header);
423:
424: #if HAVE_GETPAGESIZE
425: pagesize=getpagesize(); /* Linux/GNU libc offers this */
426: #elif HAVE_SYSCONF && defined(_SC_PAGESIZE)
427: pagesize=sysconf(_SC_PAGESIZE); /* POSIX.4 */
428: #elif PAGESIZE
429: pagesize=PAGESIZE; /* in limits.h according to Gallmeister's POSIX.4 book */
430: #endif
431: if (debug)
432: fprintf(stderr,"pagesize=%ld\n",(unsigned long) pagesize);
433:
434: image = dict_alloc(preamblesize+dictsize+data_offset)+data_offset;
435: rewind(imagefile); /* fseek(imagefile,0L,SEEK_SET); */
436: if (clear_dictionary)
437: memset(image, 0, dictsize);
438: fread(image, 1, preamblesize+header.image_size, imagefile);
439: imp=image+preamblesize;
440: if(header.base==0) {
441: Cell reloc_size=((header.image_size-1)/sizeof(Cell))/8+1;
442: char reloc_bits[reloc_size];
443: fread(reloc_bits, 1, reloc_size, imagefile);
444: relocate((Cell *)imp, reloc_bits, header.image_size, symbols);
445: #if 0
446: { /* let's see what the relocator did */
447: FILE *snapshot=fopen("snapshot.fi","wb");
448: fwrite(image,1,imagesize,snapshot);
449: fclose(snapshot);
450: }
451: #endif
452: }
453: else if(header.base!=imp) {
454: fprintf(stderr,"%s: Cannot load nonrelocatable image (compiled for address $%lx) at address $%lx\n",
455: progname, (unsigned long)header.base, (unsigned long)imp);
456: exit(1);
457: }
458: if (header.checksum==0)
459: ((ImageHeader *)imp)->checksum=check_sum;
460: else if (header.checksum != check_sum) {
461: fprintf(stderr,"%s: Checksum of image ($%lx) does not match the executable ($%lx)\n",
462: progname, (unsigned long)(header.checksum),(unsigned long)check_sum);
463: exit(1);
464: }
465: fclose(imagefile);
466:
467: alloc_stacks((ImageHeader *)imp);
468:
469: CACHE_FLUSH(imp, header.image_size);
470:
471: return imp;
472: }
473:
474: int onlypath(char *file)
475: {
476: int i;
477: i=strlen(file);
478: while (i) {
479: if (file[i]=='\\' || file[i]=='/') break;
480: i--;
481: }
482: return i;
483: }
484:
485: FILE *openimage(char *fullfilename)
486: {
487: FILE *image_file;
488:
489: image_file=fopen(fullfilename,"rb");
490: if (image_file!=NULL && debug)
491: fprintf(stderr, "Opened image file: %s\n", fullfilename);
492: return image_file;
493: }
494:
495: FILE *checkimage(char *path, int len, char *imagename)
496: {
497: int dirlen=len;
498: char fullfilename[dirlen+strlen(imagename)+2];
499:
500: memcpy(fullfilename, path, dirlen);
501: if (fullfilename[dirlen-1]!='/')
502: fullfilename[dirlen++]='/';
503: strcpy(fullfilename+dirlen,imagename);
504: return openimage(fullfilename);
505: }
506:
507: FILE * open_image_file(char * imagename, char * path)
508: {
509: FILE * image_file=NULL;
510:
511: if(strchr(imagename, '/')==NULL) {
512: /* first check the directory where the exe file is in !! 01may97jaw */
513: if (onlypath(progname))
514: image_file=checkimage(progname, onlypath(progname), imagename);
515: if (!image_file)
516: do {
517: char *pend=strchr(path, PATHSEP);
518: if (pend==NULL)
519: pend=path+strlen(path);
520: if (strlen(path)==0) break;
521: image_file=checkimage(path, pend-path, imagename);
522: path=pend+(*pend==PATHSEP);
523: } while (image_file==NULL);
524: } else {
525: image_file=openimage(imagename);
526: }
527:
528: if (!image_file) {
529: fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n",
530: progname, imagename, path);
531: exit(1);
532: }
533:
534: return image_file;
535: }
536: #endif
537:
538: #ifdef HAS_OS
539: UCell convsize(char *s, UCell elemsize)
540: /* converts s of the format [0-9]+[bekMGT]? (e.g. 25k) into the number
541: of bytes. the letter at the end indicates the unit, where e stands
542: for the element size. default is e */
543: {
544: char *endp;
545: UCell n,m;
546:
547: m = elemsize;
548: n = strtoul(s,&endp,0);
549: if (endp!=NULL) {
550: if (strcmp(endp,"b")==0)
551: m=1;
552: else if (strcmp(endp,"k")==0)
553: m=1024;
554: else if (strcmp(endp,"M")==0)
555: m=1024*1024;
556: else if (strcmp(endp,"G")==0)
557: m=1024*1024*1024;
558: else if (strcmp(endp,"T")==0) {
559: #if (SIZEOF_CHAR_P > 4)
560: m=1024*1024*1024*1024;
561: #else
562: fprintf(stderr,"%s: size specification \"%s\" too large for this machine\n", progname, endp);
563: exit(1);
564: #endif
565: } else if (strcmp(endp,"e")!=0 && strcmp(endp,"")!=0) {
566: fprintf(stderr,"%s: cannot grok size specification %s: invalid unit \"%s\"\n", progname, s, endp);
567: exit(1);
568: }
569: }
570: return n*m;
571: }
572:
573: void gforth_args(int argc, char ** argv, char ** path, char ** imagename)
574: {
575: int c;
576:
577: opterr=0;
578: while (1) {
579: int option_index=0;
580: static struct option opts[] = {
581: {"image-file", required_argument, NULL, 'i'},
582: {"dictionary-size", required_argument, NULL, 'm'},
583: {"data-stack-size", required_argument, NULL, 'd'},
584: {"return-stack-size", required_argument, NULL, 'r'},
585: {"fp-stack-size", required_argument, NULL, 'f'},
586: {"locals-stack-size", required_argument, NULL, 'l'},
587: {"path", required_argument, NULL, 'p'},
588: {"version", no_argument, NULL, 'v'},
589: {"help", no_argument, NULL, 'h'},
590: /* put something != 0 into offset_image */
591: {"offset-image", no_argument, &offset_image, 1},
592: {"no-offset-im", no_argument, &offset_image, 0},
593: {"clear-dictionary", no_argument, &clear_dictionary, 1},
594: {"die-on-signal", no_argument, &die_on_signal, 1},
595: {"debug", no_argument, &debug, 1},
596: {0,0,0,0}
597: /* no-init-file, no-rc? */
598: };
599:
600: c = getopt_long(argc, argv, "+i:m:d:r:f:l:p:vh", opts, &option_index);
601:
602: if (c==EOF)
603: break;
604: if (c=='?') {
605: optind--;
606: break;
607: }
608: switch (c) {
609: case 'i': *imagename = optarg; break;
610: case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
611: case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
612: case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
613: case 'f': fsize = convsize(optarg,sizeof(Float)); break;
614: case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
615: case 'p': *path = optarg; break;
616: case 'v': fprintf(stderr, "gforth %s\n", VERSION); exit(0);
617: case 'h':
618: fprintf(stderr, "Usage: %s [engine options] [image arguments]\n\
619: Engine Options:\n\
620: --clear-dictionary Initialize the dictionary with 0 bytes\n\
621: -d SIZE, --data-stack-size=SIZE Specify data stack size\n\
622: --debug Print debugging information during startup\n\
623: --die-on-signal exit instead of CATCHing some signals\n\
624: -f SIZE, --fp-stack-size=SIZE Specify floating point stack size\n\
625: -h, --help Print this message and exit\n\
626: -i FILE, --image-file=FILE Use image FILE instead of `gforth.fi'\n\
627: -l SIZE, --locals-stack-size=SIZE Specify locals stack size\n\
628: -m SIZE, --dictionary-size=SIZE Specify Forth dictionary size\n\
629: --no-offset-im Load image at normal position\n\
630: --offset-image Load image at a different position\n\
631: -p PATH, --path=PATH Search path for finding image and sources\n\
632: -r SIZE, --return-stack-size=SIZE Specify return stack size\n\
633: -v, --version Print version and exit\n\
634: SIZE arguments consist of an integer followed by a unit. The unit can be\n\
635: `b' (byte), `e' (element; default), `k' (KB), `M' (MB), `G' (GB) or `T' (TB).\n",
636: argv[0]);
637: optind--;
638: return;
639: exit(0);
640: }
641: }
642: }
643: #endif
644:
645: #ifdef INCLUDE_IMAGE
646: extern Cell image[];
647: extern const char reloc_bits[];
648: #endif
649:
650: int main(int argc, char **argv, char **env)
651: {
652: char *path = getenv("GFORTHPATH") ? : DEFAULTPATH;
653: #ifndef INCLUDE_IMAGE
654: char *imagename="gforth.fi";
655: FILE *image_file;
656: Address image;
657: #endif
658: int retvalue;
659:
660: #if defined(i386) && defined(ALIGNMENT_CHECK) && !defined(DIRECT_THREADED)
661: /* turn on alignment checks on the 486.
662: * on the 386 this should have no effect. */
663: __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
664: /* this is unusable with Linux' libc.4.6.27, because this library is
665: not alignment-clean; we would have to replace some library
666: functions (e.g., memcpy) to make it work. Also GCC doesn't try to keep
667: the stack FP-aligned. */
668: #endif
669:
670: /* buffering of the user output device */
671: #ifdef _IONBF
672: if (isatty(fileno(stdout))) {
673: fflush(stdout);
674: setvbuf(stdout,NULL,_IONBF,0);
675: }
676: #endif
677:
678: progname = argv[0];
679:
680: #ifdef HAS_OS
681: gforth_args(argc, argv, &path, &imagename);
682: #endif
683:
684: #ifdef INCLUDE_IMAGE
685: set_stack_sizes((ImageHeader *)image);
686: relocate(image, reloc_bits, ((ImageHeader*)&image)->image_size, (Label*)engine(0, 0, 0, 0, 0));
687: alloc_stacks((ImageHeader *)image);
688: #else
689: image_file = open_image_file(imagename, path);
690: image = loader(image_file, imagename);
691: #endif
692:
693: {
694: char path2[strlen(path)+1];
695: char *p1, *p2;
696: Cell environ[]= {
697: (Cell)argc-(optind-1),
698: (Cell)(argv+(optind-1)),
699: (Cell)strlen(path),
700: (Cell)path2};
701: argv[optind-1] = progname;
702: /*
703: for (i=0; i<environ[0]; i++)
704: printf("%s\n", ((char **)(environ[1]))[i]);
705: */
706: /* make path OS-independent by replacing path separators with NUL */
707: for (p1=path, p2=path2; *p1!='\0'; p1++, p2++)
708: if (*p1==PATHSEP)
709: *p2 = '\0';
710: else
711: *p2 = *p1;
712: *p2='\0';
713: retvalue = go_forth(image, 4, environ);
714: deprep_terminal();
715: }
716: return retvalue;
717: }
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