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(DOUBLY_INDIRECT)
61: # define CFA(n) ({Cell _n = (n); ((Cell)(((_n & 0x4000) ? symbols : xts)+(_n&~0x4000UL)));})
62: #else
63: # define CFA(n) ((Cell)(symbols+((n)&~0x4000UL)))
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: Address code_area=0;
85: Address code_here=0; /* does for code-area what HERE does for the dictionary */
86:
87: static int no_super=0; /* true if compile_prim should not fuse prims */
88: static int no_dynamic=0; /* true if compile_prim should not generate code */
89:
90: #ifdef HAS_DEBUG
91: static int debug=0;
92: #else
93: # define debug 0
94: # define perror(x...)
95: # define fprintf(x...)
96: #endif
97:
98: ImageHeader *gforth_header;
99: Label *vm_prims;
100: #ifdef DOUBLY_INDIRECT
101: Label *xts; /* same content as vm_prims, but should only be used for xts */
102: #endif
103:
104: #ifdef MEMCMP_AS_SUBROUTINE
105: int gforth_memcmp(const char * s1, const char * s2, size_t n)
106: {
107: return memcmp(s1, s2, n);
108: }
109: #endif
110:
111: /* image file format:
112: * "#! binary-path -i\n" (e.g., "#! /usr/local/bin/gforth-0.4.0 -i\n")
113: * padding to a multiple of 8
114: * magic: "Gforth2x" means format 0.4,
115: * where x is a byte with
116: * bit 7: reserved = 0
117: * bit 6:5: address unit size 2^n octets
118: * bit 4:3: character size 2^n octets
119: * bit 2:1: cell size 2^n octets
120: * bit 0: endian, big=0, little=1.
121: * The magic are always 8 octets, no matter what the native AU/character size is
122: * padding to max alignment (no padding necessary on current machines)
123: * ImageHeader structure (see forth.h)
124: * data (size in ImageHeader.image_size)
125: * tags ((if relocatable, 1 bit/data cell)
126: *
127: * tag==1 means that the corresponding word is an address;
128: * If the word is >=0, the address is within the image;
129: * addresses within the image are given relative to the start of the image.
130: * If the word =-1 (CF_NIL), the address is NIL,
131: * If the word is <CF_NIL and >CF(DODOES), it's a CFA (:, Create, ...)
132: * If the word =CF(DODOES), it's a DOES> CFA
133: * If the word =CF(DOESJUMP), it's a DOES JUMP (2 Cells after DOES>,
134: * possibly containing a jump to dodoes)
135: * If the word is <CF(DOESJUMP) and bit 14 is set, it's the xt of a primitive
136: * If the word is <CF(DOESJUMP) and bit 14 is clear,
137: * it's the threaded code of a primitive
138: */
139:
140: void relocate(Cell *image, const char *bitstring,
141: int size, int base, Label symbols[])
142: {
143: int i=0, j, k, steps=(size/sizeof(Cell))/RELINFOBITS;
144: Cell token;
145: char bits;
146: Cell max_symbols;
147: /*
148: * A virtial start address that's the real start address minus
149: * the one in the image
150: */
151: Cell *start = (Cell * ) (((void *) image) - ((void *) base));
152:
153:
154: /* printf("relocating to %x[%x] start=%x base=%x\n", image, size, start, base); */
155:
156: for (max_symbols=DOESJUMP+1; symbols[max_symbols]!=0; max_symbols++)
157: ;
158: max_symbols--;
159: size/=sizeof(Cell);
160:
161: for(k=0; k<=steps; k++) {
162: for(j=0, bits=bitstring[k]; j<RELINFOBITS; j++, i++, bits<<=1) {
163: /* fprintf(stderr,"relocate: image[%d]\n", i);*/
164: if((i < size) && (bits & (1U << (RELINFOBITS-1)))) {
165: /* fprintf(stderr,"relocate: image[%d]=%d of %d\n", i, image[i], size/sizeof(Cell)); */
166: token=image[i];
167: if(token<0)
168: switch(token|0x4000)
169: {
170: case CF_NIL : image[i]=0; break;
171: #if !defined(DOUBLY_INDIRECT)
172: case CF(DOCOL) :
173: case CF(DOVAR) :
174: case CF(DOCON) :
175: case CF(DOUSER) :
176: case CF(DODEFER) :
177: case CF(DOFIELD) : MAKE_CF(image+i,symbols[CF(token)]); break;
178: case CF(DOESJUMP): MAKE_DOES_HANDLER(image+i); break;
179: #endif /* !defined(DOUBLY_INDIRECT) */
180: case CF(DODOES) :
181: MAKE_DOES_CF(image+i,(Xt *)(image[i+1]+((Cell)start)));
182: break;
183: default :
184: /* printf("Code field generation image[%x]:=CFA(%x)\n",
185: i, CF(image[i])); */
186: if (CF((token | 0x4000))<max_symbols) {
187: image[i]=(Cell)CFA(CF(token));
188: #ifdef DIRECT_THREADED
189: if ((token & 0x4000) == 0) /* threade code, no CFA */
190: image[i] = (Cell)compile_prim((Label)image[i]);
191: #endif
192: } else
193: fprintf(stderr,"Primitive %d used in this image at $%lx is not implemented by this\n engine (%s); executing this code will crash.\n",CF(token),(long)&image[i],VERSION);
194: }
195: else {
196: // if base is > 0: 0 is a null reference so don't adjust
197: if (token>=base) {
198: image[i]+=(Cell)start;
199: }
200: }
201: }
202: }
203: }
204: ((ImageHeader*)(image))->base = (Address) image;
205: }
206:
207: UCell checksum(Label symbols[])
208: {
209: UCell r=PRIM_VERSION;
210: Cell i;
211:
212: for (i=DOCOL; i<=DOESJUMP; i++) {
213: r ^= (UCell)(symbols[i]);
214: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
215: }
216: #ifdef DIRECT_THREADED
217: /* we have to consider all the primitives */
218: for (; symbols[i]!=(Label)0; i++) {
219: r ^= (UCell)(symbols[i]);
220: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
221: }
222: #else
223: /* in indirect threaded code all primitives are accessed through the
224: symbols table, so we just have to put the base address of symbols
225: in the checksum */
226: r ^= (UCell)symbols;
227: #endif
228: return r;
229: }
230:
231: Address verbose_malloc(Cell size)
232: {
233: Address r;
234: /* leave a little room (64B) for stack underflows */
235: if ((r = malloc(size+64))==NULL) {
236: perror(progname);
237: exit(1);
238: }
239: r = (Address)((((Cell)r)+(sizeof(Float)-1))&(-sizeof(Float)));
240: if (debug)
241: fprintf(stderr, "malloc succeeds, address=$%lx\n", (long)r);
242: return r;
243: }
244:
245: static Address next_address=0;
246: void after_alloc(Address r, Cell size)
247: {
248: if (r != (Address)-1) {
249: if (debug)
250: fprintf(stderr, "success, address=$%lx\n", (long) r);
251: if (pagesize != 1)
252: next_address = (Address)(((((Cell)r)+size-1)&-pagesize)+2*pagesize); /* leave one page unmapped */
253: } else {
254: if (debug)
255: fprintf(stderr, "failed: %s\n", strerror(errno));
256: }
257: }
258:
259: #ifndef MAP_FAILED
260: #define MAP_FAILED ((Address) -1)
261: #endif
262: #ifndef MAP_FILE
263: # define MAP_FILE 0
264: #endif
265: #ifndef MAP_PRIVATE
266: # define MAP_PRIVATE 0
267: #endif
268:
269: #if defined(HAVE_MMAP)
270: static Address alloc_mmap(Cell size)
271: {
272: Address r;
273:
274: #if defined(MAP_ANON)
275: if (debug)
276: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_ANON, ...); ", (long)next_address, (long)size);
277: r = mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
278: #else /* !defined(MAP_ANON) */
279: /* Ultrix (at least) does not define MAP_FILE and MAP_PRIVATE (both are
280: apparently defaults) */
281: static int dev_zero=-1;
282:
283: if (dev_zero == -1)
284: dev_zero = open("/dev/zero", O_RDONLY);
285: if (dev_zero == -1) {
286: r = MAP_FAILED;
287: if (debug)
288: fprintf(stderr, "open(\"/dev/zero\"...) failed (%s), no mmap; ",
289: strerror(errno));
290: } else {
291: if (debug)
292: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FILE, dev_zero, ...); ", (long)next_address, (long)size);
293: r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FILE|MAP_PRIVATE, dev_zero, 0);
294: }
295: #endif /* !defined(MAP_ANON) */
296: after_alloc(r, size);
297: return r;
298: }
299: #endif
300:
301: Address my_alloc(Cell size)
302: {
303: #if HAVE_MMAP
304: Address r;
305:
306: r=alloc_mmap(size);
307: if (r!=MAP_FAILED)
308: return r;
309: #endif /* HAVE_MMAP */
310: /* use malloc as fallback */
311: return verbose_malloc(size);
312: }
313:
314: Address dict_alloc_read(FILE *file, Cell imagesize, Cell dictsize, Cell offset)
315: {
316: Address image = MAP_FAILED;
317:
318: #if defined(HAVE_MMAP)
319: if (offset==0) {
320: image=alloc_mmap(dictsize);
321: if (debug)
322: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FIXED|MAP_FILE, imagefile, 0); ", (long)image, (long)imagesize);
323: image = mmap(image, imagesize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FIXED|MAP_FILE|MAP_PRIVATE, fileno(file), 0);
324: after_alloc(image,dictsize);
325: }
326: #endif /* defined(HAVE_MMAP) */
327: if (image == MAP_FAILED) {
328: image = my_alloc(dictsize+offset)+offset;
329: rewind(file); /* fseek(imagefile,0L,SEEK_SET); */
330: fread(image, 1, imagesize, file);
331: }
332: return image;
333: }
334:
335: void set_stack_sizes(ImageHeader * header)
336: {
337: if (dictsize==0)
338: dictsize = header->dict_size;
339: if (dsize==0)
340: dsize = header->data_stack_size;
341: if (rsize==0)
342: rsize = header->return_stack_size;
343: if (fsize==0)
344: fsize = header->fp_stack_size;
345: if (lsize==0)
346: lsize = header->locals_stack_size;
347: dictsize=maxaligned(dictsize);
348: dsize=maxaligned(dsize);
349: rsize=maxaligned(rsize);
350: lsize=maxaligned(lsize);
351: fsize=maxaligned(fsize);
352: }
353:
354: void alloc_stacks(ImageHeader * header)
355: {
356: header->dict_size=dictsize;
357: header->data_stack_size=dsize;
358: header->fp_stack_size=fsize;
359: header->return_stack_size=rsize;
360: header->locals_stack_size=lsize;
361:
362: header->data_stack_base=my_alloc(dsize);
363: header->fp_stack_base=my_alloc(fsize);
364: header->return_stack_base=my_alloc(rsize);
365: header->locals_stack_base=my_alloc(lsize);
366: code_here = code_area = my_alloc(dictsize);
367: }
368:
369: #warning You can ignore the warnings about clobbered variables in go_forth
370: int go_forth(Address image, int stack, Cell *entries)
371: {
372: volatile ImageHeader *image_header = (ImageHeader *)image;
373: Cell *sp0=(Cell*)(image_header->data_stack_base + dsize);
374: Cell *rp0=(Cell *)(image_header->return_stack_base + rsize);
375: Float *fp0=(Float *)(image_header->fp_stack_base + fsize);
376: #ifdef GFORTH_DEBUGGING
377: volatile Cell *orig_rp0=rp0;
378: #endif
379: Address lp0=image_header->locals_stack_base + lsize;
380: Xt *ip0=(Xt *)(image_header->boot_entry);
381: #ifdef SYSSIGNALS
382: int throw_code;
383: #endif
384:
385: /* ensure that the cached elements (if any) are accessible */
386: IF_spTOS(sp0--);
387: IF_fpTOS(fp0--);
388:
389: for(;stack>0;stack--)
390: *--sp0=entries[stack-1];
391:
392: #ifdef SYSSIGNALS
393: get_winsize();
394:
395: install_signal_handlers(); /* right place? */
396:
397: if ((throw_code=setjmp(throw_jmp_buf))) {
398: static Cell signal_data_stack[8];
399: static Cell signal_return_stack[8];
400: static Float signal_fp_stack[1];
401:
402: signal_data_stack[7]=throw_code;
403:
404: #ifdef GFORTH_DEBUGGING
405: /* fprintf(stderr,"\nrp=%ld\n",(long)rp); */
406: if (rp <= orig_rp0 && rp > (Cell *)(image_header->return_stack_base+5)) {
407: /* no rstack overflow or underflow */
408: rp0 = rp;
409: *--rp0 = (Cell)ip;
410: }
411: else /* I love non-syntactic ifdefs :-) */
412: #endif
413: rp0 = signal_return_stack+8;
414: /* fprintf(stderr, "rp=$%x\n",rp0);*/
415:
416: return((int)(Cell)engine(image_header->throw_entry, signal_data_stack+7,
417: rp0, signal_fp_stack, 0));
418: }
419: #endif
420:
421: return((int)(Cell)engine(ip0,sp0,rp0,fp0,lp0));
422: }
423:
424:
425: #ifndef INCLUDE_IMAGE
426: void print_sizes(Cell sizebyte)
427: /* print size information */
428: {
429: static char* endianstring[]= { " big","little" };
430:
431: fprintf(stderr,"%s endian, cell=%d bytes, char=%d bytes, au=%d bytes\n",
432: endianstring[sizebyte & 1],
433: 1 << ((sizebyte >> 1) & 3),
434: 1 << ((sizebyte >> 3) & 3),
435: 1 << ((sizebyte >> 5) & 3));
436: }
437:
438: typedef struct {
439: Label start;
440: Cell length; /* excluding the jump */
441: char super_end; /* true if primitive ends superinstruction, i.e.,
442: unconditional branch, execute, etc. */
443: } PrimInfo;
444:
445: PrimInfo *priminfos;
446: Cell npriminfos=0;
447:
448: void check_prims(Label symbols1[])
449: {
450: int i;
451: Label *symbols2;
452: static char superend[]={
453: #include "prim_superend.i"
454: };
455:
456: for (i=DOESJUMP+1; symbols1[i+1]!=0; i++)
457: ;
458: npriminfos = i;
459:
460: #if defined(IS_NEXT_JUMP) && !defined(DOUBLY_INDIRECT)
461: symbols2=engine2(0,0,0,0,0);
462: priminfos = calloc(i,sizeof(PrimInfo));
463: for (i=DOESJUMP+1; symbols1[i+1]!=0; i++) {
464: int prim_len=symbols1[i+1]-symbols1[i];
465: PrimInfo *pi=&priminfos[i];
466: int j;
467: pi->super_end = superend[i-DOESJUMP-1]|no_super;
468: for (j=prim_len-IND_JUMP_LENGTH; ; j--) {
469: if (IS_NEXT_JUMP(symbols1[i]+j)) {
470: prim_len = j;
471: if (pi->super_end)
472: prim_len += IND_JUMP_LENGTH; /* include the jump */
473: break;
474: }
475: if (j==0) { /* NEXT jump not found, e.g., execute */
476: if (!pi->super_end && debug)
477: fprintf(stderr, "NEXT jump not found for primitive %d, making it super_end\n", i);
478: pi->super_end = 1;
479: break;
480: }
481: }
482: pi->length = prim_len;
483: /* fprintf(stderr,"checking primitive %d: memcmp(%p, %p, %d)\n",
484: i, symbols1[i], symbols2[i], prim_len);*/
485: if (no_dynamic||memcmp(symbols1[i],symbols2[i],prim_len)!=0) {
486: if (debug)
487: fprintf(stderr,"Primitive %d not relocatable: memcmp(%p, %p, %d)\n",
488: i, symbols1[i], symbols2[i], prim_len);
489: } else {
490: pi->start = symbols1[i];
491: if (debug)
492: fprintf(stderr,"Primitive %d relocatable: start %p, length %ld, super_end %d\n",
493: i, pi->start, pi->length, pi->super_end);
494: }
495: }
496: #endif
497: }
498:
499: Label compile_prim(Label prim)
500: {
501: #ifdef DOUBLY_INDIRECT
502: if (prim<((Label)(xts+DOESJUMP)) || prim>((Label)(xts+npriminfos))) {
503: fprintf(stderr,"compile_prim encountered xt %p\n", prim);
504: return prim;
505: } else
506: return prim-((Label)xts)+((Label)vm_prims);
507: #else /* !defined(DOUBLY_INDIRECT) */
508: #if defined(IND_JUMP_LENGTH) && !defined(VM_PROFILING)
509: unsigned i;
510: Address old_code_here=code_here;
511: static Address last_jump=0;
512:
513: i = ((Xt)prim)-vm_prims;
514: prim = *(Xt)prim;
515: if (i>=npriminfos || priminfos[i].start == 0) { /* not a relocatable prim */
516: if (last_jump) { /* make sure the last sequence is complete */
517: memcpy(code_here, last_jump, IND_JUMP_LENGTH);
518: code_here += IND_JUMP_LENGTH;
519: last_jump = 0;
520: }
521: return prim;
522: }
523: assert(priminfos[i].start = prim);
524: #ifdef ALIGN_CODE
525: ALIGN_CODE;
526: #endif
527: memcpy(code_here, (Address)prim, priminfos[i].length);
528: code_here += priminfos[i].length;
529: last_jump = (priminfos[i].super_end) ? 0 : (prim+priminfos[i].length);
530: return (Label)old_code_here;
531: #else
532: prim = *(Xt)prim;
533: return prim;
534: #endif
535: #endif /* !defined(DOUBLY_INDIRECT) */
536: }
537:
538: #ifdef PRINT_SUPER_LENGTHS
539: Cell prim_length(Cell prim)
540: {
541: return priminfos[prim+DOESJUMP+1].length;
542: }
543: #endif
544:
545: Address loader(FILE *imagefile, char* filename)
546: /* returns the address of the image proper (after the preamble) */
547: {
548: ImageHeader header;
549: Address image;
550: Address imp; /* image+preamble */
551: Char magic[8];
552: char magic7; /* size byte of magic number */
553: Cell preamblesize=0;
554: Cell data_offset = offset_image ? 56*sizeof(Cell) : 0;
555: UCell check_sum;
556: Cell ausize = ((RELINFOBITS == 8) ? 0 :
557: (RELINFOBITS == 16) ? 1 :
558: (RELINFOBITS == 32) ? 2 : 3);
559: Cell charsize = ((sizeof(Char) == 1) ? 0 :
560: (sizeof(Char) == 2) ? 1 :
561: (sizeof(Char) == 4) ? 2 : 3) + ausize;
562: Cell cellsize = ((sizeof(Cell) == 1) ? 0 :
563: (sizeof(Cell) == 2) ? 1 :
564: (sizeof(Cell) == 4) ? 2 : 3) + ausize;
565: Cell sizebyte = (ausize << 5) + (charsize << 3) + (cellsize << 1) +
566: #ifdef WORDS_BIGENDIAN
567: 0
568: #else
569: 1
570: #endif
571: ;
572:
573: vm_prims = engine(0,0,0,0,0);
574: check_prims(vm_prims);
575: #ifndef DOUBLY_INDIRECT
576: #ifdef PRINT_SUPER_LENGTHS
577: print_super_lengths();
578: #endif
579: check_sum = checksum(vm_prims);
580: #else /* defined(DOUBLY_INDIRECT) */
581: check_sum = (UCell)vm_prims;
582: #endif /* defined(DOUBLY_INDIRECT) */
583:
584: do {
585: if(fread(magic,sizeof(Char),8,imagefile) < 8) {
586: fprintf(stderr,"%s: image %s doesn't seem to be a Gforth (>=0.4) image.\n",
587: progname, filename);
588: exit(1);
589: }
590: preamblesize+=8;
591: } while(memcmp(magic,"Gforth2",7));
592: magic7 = magic[7];
593: if (debug) {
594: magic[7]='\0';
595: fprintf(stderr,"Magic found: %s ", magic);
596: print_sizes(magic7);
597: }
598:
599: if (magic7 != sizebyte)
600: {
601: fprintf(stderr,"This image is: ");
602: print_sizes(magic7);
603: fprintf(stderr,"whereas the machine is ");
604: print_sizes(sizebyte);
605: exit(-2);
606: };
607:
608: fread((void *)&header,sizeof(ImageHeader),1,imagefile);
609:
610: set_stack_sizes(&header);
611:
612: #if HAVE_GETPAGESIZE
613: pagesize=getpagesize(); /* Linux/GNU libc offers this */
614: #elif HAVE_SYSCONF && defined(_SC_PAGESIZE)
615: pagesize=sysconf(_SC_PAGESIZE); /* POSIX.4 */
616: #elif PAGESIZE
617: pagesize=PAGESIZE; /* in limits.h according to Gallmeister's POSIX.4 book */
618: #endif
619: if (debug)
620: fprintf(stderr,"pagesize=%ld\n",(unsigned long) pagesize);
621:
622: image = dict_alloc_read(imagefile, preamblesize+header.image_size,
623: preamblesize+dictsize, data_offset);
624: imp=image+preamblesize;
625: alloc_stacks((ImageHeader *)imp);
626: if (clear_dictionary)
627: memset(imp+header.image_size, 0, dictsize-header.image_size);
628: if(header.base==0 || header.base == 0x100) {
629: Cell reloc_size=((header.image_size-1)/sizeof(Cell))/8+1;
630: char reloc_bits[reloc_size];
631: fseek(imagefile, preamblesize+header.image_size, SEEK_SET);
632: fread(reloc_bits, 1, reloc_size, imagefile);
633: relocate((Cell *)imp, reloc_bits, header.image_size, header.base, vm_prims);
634: #if 0
635: { /* let's see what the relocator did */
636: FILE *snapshot=fopen("snapshot.fi","wb");
637: fwrite(image,1,imagesize,snapshot);
638: fclose(snapshot);
639: }
640: #endif
641: }
642: else if(header.base!=imp) {
643: fprintf(stderr,"%s: Cannot load nonrelocatable image (compiled for address $%lx) at address $%lx\n",
644: progname, (unsigned long)header.base, (unsigned long)imp);
645: exit(1);
646: }
647: if (header.checksum==0)
648: ((ImageHeader *)imp)->checksum=check_sum;
649: else if (header.checksum != check_sum) {
650: fprintf(stderr,"%s: Checksum of image ($%lx) does not match the executable ($%lx)\n",
651: progname, (unsigned long)(header.checksum),(unsigned long)check_sum);
652: exit(1);
653: }
654: #ifdef DOUBLY_INDIRECT
655: ((ImageHeader *)imp)->xt_base = xts;
656: #endif
657: fclose(imagefile);
658:
659: /* unnecessary, except maybe for CODE words */
660: /* FLUSH_ICACHE(imp, header.image_size);*/
661:
662: return imp;
663: }
664:
665: /* index of last '/' or '\' in file, 0 if there is none. !! Hmm, could
666: be implemented with strrchr and the separator should be
667: OS-dependent */
668: int onlypath(char *file)
669: {
670: int i;
671: i=strlen(file);
672: while (i) {
673: if (file[i]=='\\' || file[i]=='/') break;
674: i--;
675: }
676: return i;
677: }
678:
679: FILE *openimage(char *fullfilename)
680: {
681: FILE *image_file;
682: char * expfilename = tilde_cstr(fullfilename, strlen(fullfilename), 1);
683:
684: image_file=fopen(expfilename,"rb");
685: if (image_file!=NULL && debug)
686: fprintf(stderr, "Opened image file: %s\n", expfilename);
687: return image_file;
688: }
689:
690: /* try to open image file concat(path[0:len],imagename) */
691: FILE *checkimage(char *path, int len, char *imagename)
692: {
693: int dirlen=len;
694: char fullfilename[dirlen+strlen(imagename)+2];
695:
696: memcpy(fullfilename, path, dirlen);
697: if (fullfilename[dirlen-1]!='/')
698: fullfilename[dirlen++]='/';
699: strcpy(fullfilename+dirlen,imagename);
700: return openimage(fullfilename);
701: }
702:
703: FILE * open_image_file(char * imagename, char * path)
704: {
705: FILE * image_file=NULL;
706: char *origpath=path;
707:
708: if(strchr(imagename, '/')==NULL) {
709: /* first check the directory where the exe file is in !! 01may97jaw */
710: if (onlypath(progname))
711: image_file=checkimage(progname, onlypath(progname), imagename);
712: if (!image_file)
713: do {
714: char *pend=strchr(path, PATHSEP);
715: if (pend==NULL)
716: pend=path+strlen(path);
717: if (strlen(path)==0) break;
718: image_file=checkimage(path, pend-path, imagename);
719: path=pend+(*pend==PATHSEP);
720: } while (image_file==NULL);
721: } else {
722: image_file=openimage(imagename);
723: }
724:
725: if (!image_file) {
726: fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n",
727: progname, imagename, origpath);
728: exit(1);
729: }
730:
731: return image_file;
732: }
733: #endif
734:
735: #ifdef HAS_OS
736: UCell convsize(char *s, UCell elemsize)
737: /* converts s of the format [0-9]+[bekMGT]? (e.g. 25k) into the number
738: of bytes. the letter at the end indicates the unit, where e stands
739: for the element size. default is e */
740: {
741: char *endp;
742: UCell n,m;
743:
744: m = elemsize;
745: n = strtoul(s,&endp,0);
746: if (endp!=NULL) {
747: if (strcmp(endp,"b")==0)
748: m=1;
749: else if (strcmp(endp,"k")==0)
750: m=1024;
751: else if (strcmp(endp,"M")==0)
752: m=1024*1024;
753: else if (strcmp(endp,"G")==0)
754: m=1024*1024*1024;
755: else if (strcmp(endp,"T")==0) {
756: #if (SIZEOF_CHAR_P > 4)
757: m=1024L*1024*1024*1024;
758: #else
759: fprintf(stderr,"%s: size specification \"%s\" too large for this machine\n", progname, endp);
760: exit(1);
761: #endif
762: } else if (strcmp(endp,"e")!=0 && strcmp(endp,"")!=0) {
763: fprintf(stderr,"%s: cannot grok size specification %s: invalid unit \"%s\"\n", progname, s, endp);
764: exit(1);
765: }
766: }
767: return n*m;
768: }
769:
770: void gforth_args(int argc, char ** argv, char ** path, char ** imagename)
771: {
772: int c;
773:
774: opterr=0;
775: while (1) {
776: int option_index=0;
777: static struct option opts[] = {
778: {"appl-image", required_argument, NULL, 'a'},
779: {"image-file", required_argument, NULL, 'i'},
780: {"dictionary-size", required_argument, NULL, 'm'},
781: {"data-stack-size", required_argument, NULL, 'd'},
782: {"return-stack-size", required_argument, NULL, 'r'},
783: {"fp-stack-size", required_argument, NULL, 'f'},
784: {"locals-stack-size", required_argument, NULL, 'l'},
785: {"path", required_argument, NULL, 'p'},
786: {"version", no_argument, NULL, 'v'},
787: {"help", no_argument, NULL, 'h'},
788: /* put something != 0 into offset_image */
789: {"offset-image", no_argument, &offset_image, 1},
790: {"no-offset-im", no_argument, &offset_image, 0},
791: {"clear-dictionary", no_argument, &clear_dictionary, 1},
792: {"die-on-signal", no_argument, &die_on_signal, 1},
793: {"debug", no_argument, &debug, 1},
794: {"no-super", no_argument, &no_super, 1},
795: {"no-dynamic", no_argument, &no_dynamic, 1},
796: {0,0,0,0}
797: /* no-init-file, no-rc? */
798: };
799:
800: c = getopt_long(argc, argv, "+i:m:d:r:f:l:p:vhoncsx", opts, &option_index);
801:
802: switch (c) {
803: case EOF: return;
804: case '?': optind--; return;
805: case 'a': *imagename = optarg; return;
806: case 'i': *imagename = optarg; break;
807: case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
808: case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
809: case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
810: case 'f': fsize = convsize(optarg,sizeof(Float)); break;
811: case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
812: case 'p': *path = optarg; break;
813: case 'o': offset_image = 1; break;
814: case 'n': offset_image = 0; break;
815: case 'c': clear_dictionary = 1; break;
816: case 's': die_on_signal = 1; break;
817: case 'x': debug = 1; break;
818: case 'v': fprintf(stderr, "gforth %s\n", VERSION); exit(0);
819: case 'h':
820: fprintf(stderr, "Usage: %s [engine options] ['--'] [image arguments]\n\
821: Engine Options:\n\
822: --appl-image FILE equivalent to '--image-file=FILE --'\n\
823: --clear-dictionary Initialize the dictionary with 0 bytes\n\
824: -d SIZE, --data-stack-size=SIZE Specify data stack size\n\
825: --debug Print debugging information during startup\n\
826: --die-on-signal exit instead of CATCHing some signals\n\
827: -f SIZE, --fp-stack-size=SIZE Specify floating point stack size\n\
828: -h, --help Print this message and exit\n\
829: -i FILE, --image-file=FILE Use image FILE instead of `gforth.fi'\n\
830: -l SIZE, --locals-stack-size=SIZE Specify locals stack size\n\
831: -m SIZE, --dictionary-size=SIZE Specify Forth dictionary size\n\
832: --no-dynamic Use only statically compiled primitives\n\
833: --no-offset-im Load image at normal position\n\
834: --no-super No dynamically formed superinstructions\n\
835: --offset-image Load image at a different position\n\
836: -p PATH, --path=PATH Search path for finding image and sources\n\
837: -r SIZE, --return-stack-size=SIZE Specify return stack size\n\
838: -v, --version Print version and exit\n\
839: SIZE arguments consist of an integer followed by a unit. The unit can be\n\
840: `b' (byte), `e' (element; default), `k' (KB), `M' (MB), `G' (GB) or `T' (TB).\n",
841: argv[0]);
842: optind--;
843: return;
844: }
845: }
846: }
847: #endif
848:
849: #ifdef INCLUDE_IMAGE
850: extern Cell image[];
851: extern const char reloc_bits[];
852: #endif
853:
854: int main(int argc, char **argv, char **env)
855: {
856: #ifdef HAS_OS
857: char *path = getenv("GFORTHPATH") ? : DEFAULTPATH;
858: #else
859: char *path = DEFAULTPATH;
860: #endif
861: #ifndef INCLUDE_IMAGE
862: char *imagename="gforth.fi";
863: FILE *image_file;
864: Address image;
865: #endif
866: int retvalue;
867:
868: #if defined(i386) && defined(ALIGNMENT_CHECK)
869: /* turn on alignment checks on the 486.
870: * on the 386 this should have no effect. */
871: __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
872: /* this is unusable with Linux' libc.4.6.27, because this library is
873: not alignment-clean; we would have to replace some library
874: functions (e.g., memcpy) to make it work. Also GCC doesn't try to keep
875: the stack FP-aligned. */
876: #endif
877:
878: /* buffering of the user output device */
879: #ifdef _IONBF
880: if (isatty(fileno(stdout))) {
881: fflush(stdout);
882: setvbuf(stdout,NULL,_IONBF,0);
883: }
884: #endif
885:
886: progname = argv[0];
887:
888: #ifdef HAS_OS
889: gforth_args(argc, argv, &path, &imagename);
890: #endif
891:
892: #ifdef INCLUDE_IMAGE
893: set_stack_sizes((ImageHeader *)image);
894: if(((ImageHeader *)image)->base != image)
895: relocate(image, reloc_bits, ((ImageHeader *)image)->image_size,
896: (Label*)engine(0, 0, 0, 0, 0));
897: alloc_stacks((ImageHeader *)image);
898: #else
899: image_file = open_image_file(imagename, path);
900: image = loader(image_file, imagename);
901: #endif
902: gforth_header=(ImageHeader *)image; /* used in SIGSEGV handler */
903:
904: {
905: char path2[strlen(path)+1];
906: char *p1, *p2;
907: Cell environ[]= {
908: (Cell)argc-(optind-1),
909: (Cell)(argv+(optind-1)),
910: (Cell)strlen(path),
911: (Cell)path2};
912: argv[optind-1] = progname;
913: /*
914: for (i=0; i<environ[0]; i++)
915: printf("%s\n", ((char **)(environ[1]))[i]);
916: */
917: /* make path OS-independent by replacing path separators with NUL */
918: for (p1=path, p2=path2; *p1!='\0'; p1++, p2++)
919: if (*p1==PATHSEP)
920: *p2 = '\0';
921: else
922: *p2 = *p1;
923: *p2='\0';
924: retvalue = go_forth(image, 4, environ);
925: #ifdef VM_PROFILING
926: vm_print_profile(stderr);
927: #endif
928: deprep_terminal();
929: }
930: return retvalue;
931: }
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