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: Address start_flush=0; /* start of unflushed code */
87:
88: static int no_super=0; /* true if compile_prim should not fuse prims */
89: /* --no-dynamic by default on gcc versions >=3.1 (it works with 3.0.4,
90: but not with 3.2) */
91: #if (__GNUC__>2 && __GNUC_MINOR__>=1)
92: static int no_dynamic=1; /* true if compile_prim should not generate code */
93: #else
94: static int no_dynamic=0; /* true if compile_prim should not generate code */
95: #endif
96:
97: #ifdef HAS_DEBUG
98: static int debug=0;
99: #else
100: # define debug 0
101: # define perror(x...)
102: # define fprintf(x...)
103: #endif
104:
105: ImageHeader *gforth_header;
106: Label *vm_prims;
107: #ifdef DOUBLY_INDIRECT
108: Label *xts; /* same content as vm_prims, but should only be used for xts */
109: #endif
110:
111: #ifdef MEMCMP_AS_SUBROUTINE
112: int gforth_memcmp(const char * s1, const char * s2, size_t n)
113: {
114: return memcmp(s1, s2, n);
115: }
116: #endif
117:
118: /* image file format:
119: * "#! binary-path -i\n" (e.g., "#! /usr/local/bin/gforth-0.4.0 -i\n")
120: * padding to a multiple of 8
121: * magic: "Gforth2x" means format 0.4,
122: * where x is a byte with
123: * bit 7: reserved = 0
124: * bit 6:5: address unit size 2^n octets
125: * bit 4:3: character size 2^n octets
126: * bit 2:1: cell size 2^n octets
127: * bit 0: endian, big=0, little=1.
128: * The magic are always 8 octets, no matter what the native AU/character size is
129: * padding to max alignment (no padding necessary on current machines)
130: * ImageHeader structure (see forth.h)
131: * data (size in ImageHeader.image_size)
132: * tags ((if relocatable, 1 bit/data cell)
133: *
134: * tag==1 means that the corresponding word is an address;
135: * If the word is >=0, the address is within the image;
136: * addresses within the image are given relative to the start of the image.
137: * If the word =-1 (CF_NIL), the address is NIL,
138: * If the word is <CF_NIL and >CF(DODOES), it's a CFA (:, Create, ...)
139: * If the word =CF(DODOES), it's a DOES> CFA
140: * If the word =CF(DOESJUMP), it's a DOES JUMP (2 Cells after DOES>,
141: * possibly containing a jump to dodoes)
142: * If the word is <CF(DOESJUMP) and bit 14 is set, it's the xt of a primitive
143: * If the word is <CF(DOESJUMP) and bit 14 is clear,
144: * it's the threaded code of a primitive
145: */
146:
147: void relocate(Cell *image, const char *bitstring,
148: int size, int base, Label symbols[])
149: {
150: int i=0, j, k, steps=(size/sizeof(Cell))/RELINFOBITS;
151: Cell token;
152: char bits;
153: Cell max_symbols;
154: /*
155: * A virtial start address that's the real start address minus
156: * the one in the image
157: */
158: Cell *start = (Cell * ) (((void *) image) - ((void *) base));
159:
160:
161: /* printf("relocating to %x[%x] start=%x base=%x\n", image, size, start, base); */
162:
163: for (max_symbols=DOESJUMP+1; symbols[max_symbols]!=0; max_symbols++)
164: ;
165: max_symbols--;
166: size/=sizeof(Cell);
167:
168: for(k=0; k<=steps; k++) {
169: for(j=0, bits=bitstring[k]; j<RELINFOBITS; j++, i++, bits<<=1) {
170: /* fprintf(stderr,"relocate: image[%d]\n", i);*/
171: if((i < size) && (bits & (1U << (RELINFOBITS-1)))) {
172: /* fprintf(stderr,"relocate: image[%d]=%d of %d\n", i, image[i], size/sizeof(Cell)); */
173: token=image[i];
174: if(token<0)
175: switch(token|0x4000)
176: {
177: case CF_NIL : image[i]=0; break;
178: #if !defined(DOUBLY_INDIRECT)
179: case CF(DOCOL) :
180: case CF(DOVAR) :
181: case CF(DOCON) :
182: case CF(DOUSER) :
183: case CF(DODEFER) :
184: case CF(DOFIELD) : MAKE_CF(image+i,symbols[CF(token)]); break;
185: case CF(DOESJUMP): MAKE_DOES_HANDLER(image+i); break;
186: #endif /* !defined(DOUBLY_INDIRECT) */
187: case CF(DODOES) :
188: MAKE_DOES_CF(image+i,(Xt *)(image[i+1]+((Cell)start)));
189: break;
190: default :
191: /* printf("Code field generation image[%x]:=CFA(%x)\n",
192: i, CF(image[i])); */
193: if (CF((token | 0x4000))<max_symbols) {
194: image[i]=(Cell)CFA(CF(token));
195: #ifdef DIRECT_THREADED
196: if ((token & 0x4000) == 0) /* threade code, no CFA */
197: image[i] = (Cell)compile_prim((Label)image[i]);
198: #endif
199: } else
200: fprintf(stderr,"Primitive %d used in this image at $%lx is not implemented by this\n engine (%s); executing this code will crash.\n",CF(token),(long)&image[i],VERSION);
201: }
202: else {
203: // if base is > 0: 0 is a null reference so don't adjust
204: if (token>=base) {
205: image[i]+=(Cell)start;
206: }
207: }
208: }
209: }
210: }
211: ((ImageHeader*)(image))->base = (Address) image;
212: }
213:
214: UCell checksum(Label symbols[])
215: {
216: UCell r=PRIM_VERSION;
217: Cell i;
218:
219: for (i=DOCOL; i<=DOESJUMP; i++) {
220: r ^= (UCell)(symbols[i]);
221: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
222: }
223: #ifdef DIRECT_THREADED
224: /* we have to consider all the primitives */
225: for (; symbols[i]!=(Label)0; i++) {
226: r ^= (UCell)(symbols[i]);
227: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
228: }
229: #else
230: /* in indirect threaded code all primitives are accessed through the
231: symbols table, so we just have to put the base address of symbols
232: in the checksum */
233: r ^= (UCell)symbols;
234: #endif
235: return r;
236: }
237:
238: Address verbose_malloc(Cell size)
239: {
240: Address r;
241: /* leave a little room (64B) for stack underflows */
242: if ((r = malloc(size+64))==NULL) {
243: perror(progname);
244: exit(1);
245: }
246: r = (Address)((((Cell)r)+(sizeof(Float)-1))&(-sizeof(Float)));
247: if (debug)
248: fprintf(stderr, "malloc succeeds, address=$%lx\n", (long)r);
249: return r;
250: }
251:
252: static Address next_address=0;
253: void after_alloc(Address r, Cell size)
254: {
255: if (r != (Address)-1) {
256: if (debug)
257: fprintf(stderr, "success, address=$%lx\n", (long) r);
258: if (pagesize != 1)
259: next_address = (Address)(((((Cell)r)+size-1)&-pagesize)+2*pagesize); /* leave one page unmapped */
260: } else {
261: if (debug)
262: fprintf(stderr, "failed: %s\n", strerror(errno));
263: }
264: }
265:
266: #ifndef MAP_FAILED
267: #define MAP_FAILED ((Address) -1)
268: #endif
269: #ifndef MAP_FILE
270: # define MAP_FILE 0
271: #endif
272: #ifndef MAP_PRIVATE
273: # define MAP_PRIVATE 0
274: #endif
275:
276: #if defined(HAVE_MMAP)
277: static Address alloc_mmap(Cell size)
278: {
279: Address r;
280:
281: #if defined(MAP_ANON)
282: if (debug)
283: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_ANON, ...); ", (long)next_address, (long)size);
284: r = mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
285: #else /* !defined(MAP_ANON) */
286: /* Ultrix (at least) does not define MAP_FILE and MAP_PRIVATE (both are
287: apparently defaults) */
288: static int dev_zero=-1;
289:
290: if (dev_zero == -1)
291: dev_zero = open("/dev/zero", O_RDONLY);
292: if (dev_zero == -1) {
293: r = MAP_FAILED;
294: if (debug)
295: fprintf(stderr, "open(\"/dev/zero\"...) failed (%s), no mmap; ",
296: strerror(errno));
297: } else {
298: if (debug)
299: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FILE, dev_zero, ...); ", (long)next_address, (long)size);
300: r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FILE|MAP_PRIVATE, dev_zero, 0);
301: }
302: #endif /* !defined(MAP_ANON) */
303: after_alloc(r, size);
304: return r;
305: }
306: #endif
307:
308: Address my_alloc(Cell size)
309: {
310: #if HAVE_MMAP
311: Address r;
312:
313: r=alloc_mmap(size);
314: if (r!=MAP_FAILED)
315: return r;
316: #endif /* HAVE_MMAP */
317: /* use malloc as fallback */
318: return verbose_malloc(size);
319: }
320:
321: Address dict_alloc_read(FILE *file, Cell imagesize, Cell dictsize, Cell offset)
322: {
323: Address image = MAP_FAILED;
324:
325: #if defined(HAVE_MMAP)
326: if (offset==0) {
327: image=alloc_mmap(dictsize);
328: if (debug)
329: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FIXED|MAP_FILE, imagefile, 0); ", (long)image, (long)imagesize);
330: image = mmap(image, imagesize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FIXED|MAP_FILE|MAP_PRIVATE, fileno(file), 0);
331: after_alloc(image,dictsize);
332: }
333: #endif /* defined(HAVE_MMAP) */
334: if (image == MAP_FAILED) {
335: image = my_alloc(dictsize+offset)+offset;
336: rewind(file); /* fseek(imagefile,0L,SEEK_SET); */
337: fread(image, 1, imagesize, file);
338: }
339: return image;
340: }
341:
342: void set_stack_sizes(ImageHeader * header)
343: {
344: if (dictsize==0)
345: dictsize = header->dict_size;
346: if (dsize==0)
347: dsize = header->data_stack_size;
348: if (rsize==0)
349: rsize = header->return_stack_size;
350: if (fsize==0)
351: fsize = header->fp_stack_size;
352: if (lsize==0)
353: lsize = header->locals_stack_size;
354: dictsize=maxaligned(dictsize);
355: dsize=maxaligned(dsize);
356: rsize=maxaligned(rsize);
357: lsize=maxaligned(lsize);
358: fsize=maxaligned(fsize);
359: }
360:
361: void alloc_stacks(ImageHeader * header)
362: {
363: header->dict_size=dictsize;
364: header->data_stack_size=dsize;
365: header->fp_stack_size=fsize;
366: header->return_stack_size=rsize;
367: header->locals_stack_size=lsize;
368:
369: header->data_stack_base=my_alloc(dsize);
370: header->fp_stack_base=my_alloc(fsize);
371: header->return_stack_base=my_alloc(rsize);
372: header->locals_stack_base=my_alloc(lsize);
373: code_here = start_flush = code_area = my_alloc(dictsize);
374: }
375:
376: #warning You can ignore the warnings about clobbered variables in go_forth
377: int go_forth(Address image, int stack, Cell *entries)
378: {
379: volatile ImageHeader *image_header = (ImageHeader *)image;
380: Cell *sp0=(Cell*)(image_header->data_stack_base + dsize);
381: Cell *rp0=(Cell *)(image_header->return_stack_base + rsize);
382: Float *fp0=(Float *)(image_header->fp_stack_base + fsize);
383: #ifdef GFORTH_DEBUGGING
384: volatile Cell *orig_rp0=rp0;
385: #endif
386: Address lp0=image_header->locals_stack_base + lsize;
387: Xt *ip0=(Xt *)(image_header->boot_entry);
388: #ifdef SYSSIGNALS
389: int throw_code;
390: #endif
391:
392: /* ensure that the cached elements (if any) are accessible */
393: IF_spTOS(sp0--);
394: IF_fpTOS(fp0--);
395:
396: for(;stack>0;stack--)
397: *--sp0=entries[stack-1];
398:
399: #ifdef SYSSIGNALS
400: get_winsize();
401:
402: install_signal_handlers(); /* right place? */
403:
404: if ((throw_code=setjmp(throw_jmp_buf))) {
405: static Cell signal_data_stack[8];
406: static Cell signal_return_stack[8];
407: static Float signal_fp_stack[1];
408:
409: signal_data_stack[7]=throw_code;
410:
411: #ifdef GFORTH_DEBUGGING
412: /* fprintf(stderr,"\nrp=%ld\n",(long)rp); */
413: if (rp <= orig_rp0 && rp > (Cell *)(image_header->return_stack_base+5)) {
414: /* no rstack overflow or underflow */
415: rp0 = rp;
416: *--rp0 = (Cell)saved_ip;
417: }
418: else /* I love non-syntactic ifdefs :-) */
419: #endif
420: rp0 = signal_return_stack+8;
421: /* fprintf(stderr, "rp=$%x\n",rp0);*/
422:
423: return((int)(Cell)engine(image_header->throw_entry, signal_data_stack+7,
424: rp0, signal_fp_stack, 0));
425: }
426: #endif
427:
428: return((int)(Cell)engine(ip0,sp0,rp0,fp0,lp0));
429: }
430:
431:
432: #ifndef INCLUDE_IMAGE
433: void print_sizes(Cell sizebyte)
434: /* print size information */
435: {
436: static char* endianstring[]= { " big","little" };
437:
438: fprintf(stderr,"%s endian, cell=%d bytes, char=%d bytes, au=%d bytes\n",
439: endianstring[sizebyte & 1],
440: 1 << ((sizebyte >> 1) & 3),
441: 1 << ((sizebyte >> 3) & 3),
442: 1 << ((sizebyte >> 5) & 3));
443: }
444:
445: typedef struct {
446: Label start;
447: Cell length; /* excluding the jump */
448: char super_end; /* true if primitive ends superinstruction, i.e.,
449: unconditional branch, execute, etc. */
450: } PrimInfo;
451:
452: PrimInfo *priminfos;
453: Cell npriminfos=0;
454:
455: void check_prims(Label symbols1[])
456: {
457: int i;
458: Label *symbols2;
459: static char superend[]={
460: #include "prim_superend.i"
461: };
462:
463: if (debug)
464: #ifdef __VERSION__
465: fprintf(stderr, "Compiled with gcc-" __VERSION__ "\n");
466: #else
467: #define xstr(s) str(s)
468: #define str(s) #s
469: fprintf(stderr, "Compiled with gcc-" xstr(__GNUC__) "." xstr(__GNUC_MINOR__) "\n");
470: #endif
471: for (i=DOESJUMP+1; symbols1[i+1]!=0; i++)
472: ;
473: npriminfos = i;
474:
475: #if defined(IS_NEXT_JUMP) && !defined(DOUBLY_INDIRECT)
476: if (no_dynamic)
477: return;
478: symbols2=engine2(0,0,0,0,0);
479: priminfos = calloc(i,sizeof(PrimInfo));
480: for (i=DOESJUMP+1; symbols1[i+1]!=0; i++) {
481: int prim_len=symbols1[i+1]-symbols1[i];
482: PrimInfo *pi=&priminfos[i];
483: int j;
484: pi->super_end = superend[i-DOESJUMP-1]|no_super;
485: for (j=prim_len-IND_JUMP_LENGTH; ; j--) {
486: if (IS_NEXT_JUMP(symbols1[i]+j)) {
487: prim_len = j;
488: if (pi->super_end)
489: prim_len += IND_JUMP_LENGTH; /* include the jump */
490: break;
491: }
492: if (j==0) { /* NEXT jump not found, e.g., execute */
493: if (!pi->super_end && debug)
494: fprintf(stderr, "NEXT jump not found for primitive %d, making it super_end\n", i);
495: pi->super_end = 1;
496: break;
497: }
498: }
499: pi->length = prim_len;
500: /* fprintf(stderr,"checking primitive %d: memcmp(%p, %p, %d)\n",
501: i, symbols1[i], symbols2[i], prim_len);*/
502: if (memcmp(symbols1[i],symbols2[i],prim_len)!=0) {
503: if (debug)
504: fprintf(stderr,"Primitive %d not relocatable: memcmp(%p, %p, %d)\n",
505: i, symbols1[i], symbols2[i], prim_len);
506: } else {
507: pi->start = symbols1[i];
508: if (debug)
509: fprintf(stderr,"Primitive %d relocatable: start %p, length %ld, super_end %d\n",
510: i, pi->start, pi->length, pi->super_end);
511: }
512: }
513: #endif
514: }
515:
516: Label compile_prim(Label prim)
517: {
518: #if defined(DOUBLY_INDIRECT)
519: if (prim<((Label)(xts+DOESJUMP)) || prim>((Label)(xts+npriminfos))) {
520: fprintf(stderr,"compile_prim encountered xt %p\n", prim);
521: return prim;
522: } else
523: return prim-((Label)xts)+((Label)vm_prims);
524: #elif defined(IND_JUMP_LENGTH) && !defined(VM_PROFILING) && !defined(INDIRECT_THREADED)
525: unsigned i;
526: Address old_code_here=code_here;
527: static Address last_jump=0;
528:
529: i = ((Xt)prim)-vm_prims;
530: prim = *(Xt)prim;
531: if (no_dynamic)
532: return prim;
533: if (i>=npriminfos || priminfos[i].start == 0) { /* not a relocatable prim */
534: if (last_jump) { /* make sure the last sequence is complete */
535: memcpy(code_here, last_jump, IND_JUMP_LENGTH);
536: code_here += IND_JUMP_LENGTH;
537: last_jump = 0;
538: FLUSH_ICACHE(start_flush, code_here-start_flush);
539: start_flush=code_here;
540: }
541: return prim;
542: }
543: assert(priminfos[i].start = prim);
544: #ifdef ALIGN_CODE
545: ALIGN_CODE;
546: #endif
547: memcpy(code_here, (Address)prim, priminfos[i].length);
548: code_here += priminfos[i].length;
549: last_jump = (priminfos[i].super_end) ? 0 : (prim+priminfos[i].length);
550: if (last_jump == 0) {
551: FLUSH_ICACHE(start_flush, code_here-start_flush);
552: start_flush=code_here;
553: }
554: return (Label)old_code_here;
555: #else /* !defined(DOUBLY_INDIRECT), no code replication */
556: #if !defined(INDIRECT_THREADED)
557: prim = *(Xt)prim;
558: #endif
559: return prim;
560: #endif /* !defined(DOUBLY_INDIRECT) */
561: }
562:
563: #ifdef PRINT_SUPER_LENGTHS
564: Cell prim_length(Cell prim)
565: {
566: return priminfos[prim+DOESJUMP+1].length;
567: }
568: #endif
569:
570: Address loader(FILE *imagefile, char* filename)
571: /* returns the address of the image proper (after the preamble) */
572: {
573: ImageHeader header;
574: Address image;
575: Address imp; /* image+preamble */
576: Char magic[8];
577: char magic7; /* size byte of magic number */
578: Cell preamblesize=0;
579: Cell data_offset = offset_image ? 56*sizeof(Cell) : 0;
580: UCell check_sum;
581: Cell ausize = ((RELINFOBITS == 8) ? 0 :
582: (RELINFOBITS == 16) ? 1 :
583: (RELINFOBITS == 32) ? 2 : 3);
584: Cell charsize = ((sizeof(Char) == 1) ? 0 :
585: (sizeof(Char) == 2) ? 1 :
586: (sizeof(Char) == 4) ? 2 : 3) + ausize;
587: Cell cellsize = ((sizeof(Cell) == 1) ? 0 :
588: (sizeof(Cell) == 2) ? 1 :
589: (sizeof(Cell) == 4) ? 2 : 3) + ausize;
590: Cell sizebyte = (ausize << 5) + (charsize << 3) + (cellsize << 1) +
591: #ifdef WORDS_BIGENDIAN
592: 0
593: #else
594: 1
595: #endif
596: ;
597:
598: vm_prims = engine(0,0,0,0,0);
599: check_prims(vm_prims);
600: #ifndef DOUBLY_INDIRECT
601: #ifdef PRINT_SUPER_LENGTHS
602: print_super_lengths();
603: #endif
604: check_sum = checksum(vm_prims);
605: #else /* defined(DOUBLY_INDIRECT) */
606: check_sum = (UCell)vm_prims;
607: #endif /* defined(DOUBLY_INDIRECT) */
608:
609: do {
610: if(fread(magic,sizeof(Char),8,imagefile) < 8) {
611: fprintf(stderr,"%s: image %s doesn't seem to be a Gforth (>=0.4) image.\n",
612: progname, filename);
613: exit(1);
614: }
615: preamblesize+=8;
616: } while(memcmp(magic,"Gforth2",7));
617: magic7 = magic[7];
618: if (debug) {
619: magic[7]='\0';
620: fprintf(stderr,"Magic found: %s ", magic);
621: print_sizes(magic7);
622: }
623:
624: if (magic7 != sizebyte)
625: {
626: fprintf(stderr,"This image is: ");
627: print_sizes(magic7);
628: fprintf(stderr,"whereas the machine is ");
629: print_sizes(sizebyte);
630: exit(-2);
631: };
632:
633: fread((void *)&header,sizeof(ImageHeader),1,imagefile);
634:
635: set_stack_sizes(&header);
636:
637: #if HAVE_GETPAGESIZE
638: pagesize=getpagesize(); /* Linux/GNU libc offers this */
639: #elif HAVE_SYSCONF && defined(_SC_PAGESIZE)
640: pagesize=sysconf(_SC_PAGESIZE); /* POSIX.4 */
641: #elif PAGESIZE
642: pagesize=PAGESIZE; /* in limits.h according to Gallmeister's POSIX.4 book */
643: #endif
644: if (debug)
645: fprintf(stderr,"pagesize=%ld\n",(unsigned long) pagesize);
646:
647: image = dict_alloc_read(imagefile, preamblesize+header.image_size,
648: preamblesize+dictsize, data_offset);
649: imp=image+preamblesize;
650: alloc_stacks((ImageHeader *)imp);
651: if (clear_dictionary)
652: memset(imp+header.image_size, 0, dictsize-header.image_size);
653: if(header.base==0 || header.base == 0x100) {
654: Cell reloc_size=((header.image_size-1)/sizeof(Cell))/8+1;
655: char reloc_bits[reloc_size];
656: fseek(imagefile, preamblesize+header.image_size, SEEK_SET);
657: fread(reloc_bits, 1, reloc_size, imagefile);
658: relocate((Cell *)imp, reloc_bits, header.image_size, header.base, vm_prims);
659: #if 0
660: { /* let's see what the relocator did */
661: FILE *snapshot=fopen("snapshot.fi","wb");
662: fwrite(image,1,imagesize,snapshot);
663: fclose(snapshot);
664: }
665: #endif
666: }
667: else if(header.base!=imp) {
668: fprintf(stderr,"%s: Cannot load nonrelocatable image (compiled for address $%lx) at address $%lx\n",
669: progname, (unsigned long)header.base, (unsigned long)imp);
670: exit(1);
671: }
672: if (header.checksum==0)
673: ((ImageHeader *)imp)->checksum=check_sum;
674: else if (header.checksum != check_sum) {
675: fprintf(stderr,"%s: Checksum of image ($%lx) does not match the executable ($%lx)\n",
676: progname, (unsigned long)(header.checksum),(unsigned long)check_sum);
677: exit(1);
678: }
679: #ifdef DOUBLY_INDIRECT
680: ((ImageHeader *)imp)->xt_base = xts;
681: #endif
682: fclose(imagefile);
683:
684: /* unnecessary, except maybe for CODE words */
685: /* FLUSH_ICACHE(imp, header.image_size);*/
686:
687: return imp;
688: }
689:
690: /* index of last '/' or '\' in file, 0 if there is none. !! Hmm, could
691: be implemented with strrchr and the separator should be
692: OS-dependent */
693: int onlypath(char *file)
694: {
695: int i;
696: i=strlen(file);
697: while (i) {
698: if (file[i]=='\\' || file[i]=='/') break;
699: i--;
700: }
701: return i;
702: }
703:
704: FILE *openimage(char *fullfilename)
705: {
706: FILE *image_file;
707: char * expfilename = tilde_cstr(fullfilename, strlen(fullfilename), 1);
708:
709: image_file=fopen(expfilename,"rb");
710: if (image_file!=NULL && debug)
711: fprintf(stderr, "Opened image file: %s\n", expfilename);
712: return image_file;
713: }
714:
715: /* try to open image file concat(path[0:len],imagename) */
716: FILE *checkimage(char *path, int len, char *imagename)
717: {
718: int dirlen=len;
719: char fullfilename[dirlen+strlen(imagename)+2];
720:
721: memcpy(fullfilename, path, dirlen);
722: if (fullfilename[dirlen-1]!='/')
723: fullfilename[dirlen++]='/';
724: strcpy(fullfilename+dirlen,imagename);
725: return openimage(fullfilename);
726: }
727:
728: FILE * open_image_file(char * imagename, char * path)
729: {
730: FILE * image_file=NULL;
731: char *origpath=path;
732:
733: if(strchr(imagename, '/')==NULL) {
734: /* first check the directory where the exe file is in !! 01may97jaw */
735: if (onlypath(progname))
736: image_file=checkimage(progname, onlypath(progname), imagename);
737: if (!image_file)
738: do {
739: char *pend=strchr(path, PATHSEP);
740: if (pend==NULL)
741: pend=path+strlen(path);
742: if (strlen(path)==0) break;
743: image_file=checkimage(path, pend-path, imagename);
744: path=pend+(*pend==PATHSEP);
745: } while (image_file==NULL);
746: } else {
747: image_file=openimage(imagename);
748: }
749:
750: if (!image_file) {
751: fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n",
752: progname, imagename, origpath);
753: exit(1);
754: }
755:
756: return image_file;
757: }
758: #endif
759:
760: #ifdef HAS_OS
761: UCell convsize(char *s, UCell elemsize)
762: /* converts s of the format [0-9]+[bekMGT]? (e.g. 25k) into the number
763: of bytes. the letter at the end indicates the unit, where e stands
764: for the element size. default is e */
765: {
766: char *endp;
767: UCell n,m;
768:
769: m = elemsize;
770: n = strtoul(s,&endp,0);
771: if (endp!=NULL) {
772: if (strcmp(endp,"b")==0)
773: m=1;
774: else if (strcmp(endp,"k")==0)
775: m=1024;
776: else if (strcmp(endp,"M")==0)
777: m=1024*1024;
778: else if (strcmp(endp,"G")==0)
779: m=1024*1024*1024;
780: else if (strcmp(endp,"T")==0) {
781: #if (SIZEOF_CHAR_P > 4)
782: m=1024L*1024*1024*1024;
783: #else
784: fprintf(stderr,"%s: size specification \"%s\" too large for this machine\n", progname, endp);
785: exit(1);
786: #endif
787: } else if (strcmp(endp,"e")!=0 && strcmp(endp,"")!=0) {
788: fprintf(stderr,"%s: cannot grok size specification %s: invalid unit \"%s\"\n", progname, s, endp);
789: exit(1);
790: }
791: }
792: return n*m;
793: }
794:
795: void gforth_args(int argc, char ** argv, char ** path, char ** imagename)
796: {
797: int c;
798:
799: opterr=0;
800: while (1) {
801: int option_index=0;
802: static struct option opts[] = {
803: {"appl-image", required_argument, NULL, 'a'},
804: {"image-file", required_argument, NULL, 'i'},
805: {"dictionary-size", required_argument, NULL, 'm'},
806: {"data-stack-size", required_argument, NULL, 'd'},
807: {"return-stack-size", required_argument, NULL, 'r'},
808: {"fp-stack-size", required_argument, NULL, 'f'},
809: {"locals-stack-size", required_argument, NULL, 'l'},
810: {"path", required_argument, NULL, 'p'},
811: {"version", no_argument, NULL, 'v'},
812: {"help", no_argument, NULL, 'h'},
813: /* put something != 0 into offset_image */
814: {"offset-image", no_argument, &offset_image, 1},
815: {"no-offset-im", no_argument, &offset_image, 0},
816: {"clear-dictionary", no_argument, &clear_dictionary, 1},
817: {"die-on-signal", no_argument, &die_on_signal, 1},
818: {"debug", no_argument, &debug, 1},
819: {"no-super", no_argument, &no_super, 1},
820: {"no-dynamic", no_argument, &no_dynamic, 1},
821: {"dynamic", no_argument, &no_dynamic, 0},
822: {0,0,0,0}
823: /* no-init-file, no-rc? */
824: };
825:
826: c = getopt_long(argc, argv, "+i:m:d:r:f:l:p:vhoncsx", opts, &option_index);
827:
828: switch (c) {
829: case EOF: return;
830: case '?': optind--; return;
831: case 'a': *imagename = optarg; return;
832: case 'i': *imagename = optarg; break;
833: case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
834: case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
835: case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
836: case 'f': fsize = convsize(optarg,sizeof(Float)); break;
837: case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
838: case 'p': *path = optarg; break;
839: case 'o': offset_image = 1; break;
840: case 'n': offset_image = 0; break;
841: case 'c': clear_dictionary = 1; break;
842: case 's': die_on_signal = 1; break;
843: case 'x': debug = 1; break;
844: case 'v': fprintf(stderr, "gforth %s\n", VERSION); exit(0);
845: case 'h':
846: fprintf(stderr, "Usage: %s [engine options] ['--'] [image arguments]\n\
847: Engine Options:\n\
848: --appl-image FILE equivalent to '--image-file=FILE --'\n\
849: --clear-dictionary Initialize the dictionary with 0 bytes\n\
850: -d SIZE, --data-stack-size=SIZE Specify data stack size\n\
851: --debug Print debugging information during startup\n\
852: --die-on-signal exit instead of CATCHing some signals\n\
853: --dynamic use dynamic native code\n\
854: -f SIZE, --fp-stack-size=SIZE Specify floating point stack size\n\
855: -h, --help Print this message and exit\n\
856: -i FILE, --image-file=FILE Use image FILE instead of `gforth.fi'\n\
857: -l SIZE, --locals-stack-size=SIZE Specify locals stack size\n\
858: -m SIZE, --dictionary-size=SIZE Specify Forth dictionary size\n\
859: --no-dynamic Use only statically compiled primitives\n\
860: --no-offset-im Load image at normal position\n\
861: --no-super No dynamically formed superinstructions\n\
862: --offset-image Load image at a different position\n\
863: -p PATH, --path=PATH Search path for finding image and sources\n\
864: -r SIZE, --return-stack-size=SIZE Specify return stack size\n\
865: -v, --version Print engine version and exit\n\
866: SIZE arguments consist of an integer followed by a unit. The unit can be\n\
867: `b' (byte), `e' (element; default), `k' (KB), `M' (MB), `G' (GB) or `T' (TB).\n",
868: argv[0]);
869: optind--;
870: return;
871: }
872: }
873: }
874: #endif
875:
876: #ifdef INCLUDE_IMAGE
877: extern Cell image[];
878: extern const char reloc_bits[];
879: #endif
880:
881: DCell double2ll(Float r)
882: {
883: #ifndef BUGGY_LONG_LONG
884: return (DCell)(r);
885: #else
886: DCell d;
887: d.hi = ldexp(r,-(int)(CELL_BITS)) - (r<0);
888: d.lo = r-ldexp((Float)d.hi,CELL_BITS);
889: return d;
890: #endif
891: }
892:
893: int main(int argc, char **argv, char **env)
894: {
895: #ifdef HAS_OS
896: char *path = getenv("GFORTHPATH") ? : DEFAULTPATH;
897: #else
898: char *path = DEFAULTPATH;
899: #endif
900: #ifndef INCLUDE_IMAGE
901: char *imagename="gforth.fi";
902: FILE *image_file;
903: Address image;
904: #endif
905: int retvalue;
906:
907: #if defined(i386) && defined(ALIGNMENT_CHECK)
908: /* turn on alignment checks on the 486.
909: * on the 386 this should have no effect. */
910: __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
911: /* this is unusable with Linux' libc.4.6.27, because this library is
912: not alignment-clean; we would have to replace some library
913: functions (e.g., memcpy) to make it work. Also GCC doesn't try to keep
914: the stack FP-aligned. */
915: #endif
916:
917: /* buffering of the user output device */
918: #ifdef _IONBF
919: if (isatty(fileno(stdout))) {
920: fflush(stdout);
921: setvbuf(stdout,NULL,_IONBF,0);
922: }
923: #endif
924:
925: progname = argv[0];
926:
927: #ifdef HAS_OS
928: gforth_args(argc, argv, &path, &imagename);
929: #endif
930:
931: #ifdef INCLUDE_IMAGE
932: set_stack_sizes((ImageHeader *)image);
933: if(((ImageHeader *)image)->base != image)
934: relocate(image, reloc_bits, ((ImageHeader *)image)->image_size,
935: (Label*)engine(0, 0, 0, 0, 0));
936: alloc_stacks((ImageHeader *)image);
937: #else
938: image_file = open_image_file(imagename, path);
939: image = loader(image_file, imagename);
940: #endif
941: gforth_header=(ImageHeader *)image; /* used in SIGSEGV handler */
942:
943: {
944: char path2[strlen(path)+1];
945: char *p1, *p2;
946: Cell environ[]= {
947: (Cell)argc-(optind-1),
948: (Cell)(argv+(optind-1)),
949: (Cell)strlen(path),
950: (Cell)path2};
951: argv[optind-1] = progname;
952: /*
953: for (i=0; i<environ[0]; i++)
954: printf("%s\n", ((char **)(environ[1]))[i]);
955: */
956: /* make path OS-independent by replacing path separators with NUL */
957: for (p1=path, p2=path2; *p1!='\0'; p1++, p2++)
958: if (*p1==PATHSEP)
959: *p2 = '\0';
960: else
961: *p2 = *p1;
962: *p2='\0';
963: retvalue = go_forth(image, 4, environ);
964: #ifdef VM_PROFILING
965: vm_print_profile(stderr);
966: #endif
967: deprep_terminal();
968: }
969: return retvalue;
970: }
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