Annotation of gforth/engine/main.c, revision 1.47
1.1 anton 1: /* command line interpretation, image loading etc. for Gforth
2:
3:
1.39 anton 4: Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc.
1.1 anton 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
1.40 anton 20: Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
1.1 anton 21: */
22:
23: #include "config.h"
24: #include <errno.h>
25: #include <ctype.h>
26: #include <stdio.h>
1.2 pazsan 27: #include <unistd.h>
1.1 anton 28: #include <string.h>
29: #include <math.h>
30: #include <sys/types.h>
1.32 pazsan 31: #ifndef STANDALONE
1.1 anton 32: #include <sys/stat.h>
1.32 pazsan 33: #endif
1.1 anton 34: #include <fcntl.h>
35: #include <assert.h>
36: #include <stdlib.h>
1.11 pazsan 37: #ifndef STANDALONE
1.1 anton 38: #if HAVE_SYS_MMAN_H
39: #include <sys/mman.h>
40: #endif
1.11 pazsan 41: #endif
1.1 anton 42: #include "forth.h"
43: #include "io.h"
44: #include "getopt.h"
1.11 pazsan 45: #ifdef STANDALONE
46: #include <systypes.h>
47: #endif
1.1 anton 48:
49: #define PRIM_VERSION 1
50: /* increment this whenever the primitives change in an incompatible way */
51:
1.14 pazsan 52: #ifndef DEFAULTPATH
1.39 anton 53: # define DEFAULTPATH "."
1.14 pazsan 54: #endif
55:
1.1 anton 56: #ifdef MSDOS
57: jmp_buf throw_jmp_buf;
58: #endif
59:
60: #if defined(DIRECT_THREADED)
61: # define CA(n) (symbols[(n)])
62: #else
63: # define CA(n) ((Cell)(symbols+(n)))
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;
1.4 anton 74: int die_on_signal=0;
1.13 pazsan 75: #ifndef INCLUDE_IMAGE
1.1 anton 76: static int clear_dictionary=0;
1.24 anton 77: UCell pagesize=1;
1.22 pazsan 78: char *progname;
79: #else
80: char *progname = "gforth";
81: int optind = 1;
1.13 pazsan 82: #endif
1.31 pazsan 83:
1.30 pazsan 84: #ifdef HAS_DEBUG
1.1 anton 85: static int debug=0;
1.31 pazsan 86: #else
87: # define debug 0
88: # define perror(x...)
89: # define fprintf(x...)
1.30 pazsan 90: #endif
1.31 pazsan 91:
1.24 anton 92: ImageHeader *gforth_header;
1.43 anton 93: Label *vm_prims;
1.1 anton 94:
1.30 pazsan 95: #ifdef MEMCMP_AS_SUBROUTINE
96: int gforth_memcmp(const char * s1, const char * s2, size_t n)
97: {
98: return memcmp(s1, s2, n);
99: }
100: #endif
101:
1.1 anton 102: /* image file format:
1.15 pazsan 103: * "#! binary-path -i\n" (e.g., "#! /usr/local/bin/gforth-0.4.0 -i\n")
1.1 anton 104: * padding to a multiple of 8
1.15 pazsan 105: * magic: "Gforth2x" means format 0.4,
106: * where x is a byte with
107: * bit 7: reserved = 0
108: * bit 6:5: address unit size 2^n octets
109: * bit 4:3: character size 2^n octets
110: * bit 2:1: cell size 2^n octets
111: * bit 0: endian, big=0, little=1.
112: * The magic are always 8 octets, no matter what the native AU/character size is
1.1 anton 113: * padding to max alignment (no padding necessary on current machines)
1.24 anton 114: * ImageHeader structure (see forth.h)
1.1 anton 115: * data (size in ImageHeader.image_size)
116: * tags ((if relocatable, 1 bit/data cell)
117: *
118: * tag==1 means that the corresponding word is an address;
119: * If the word is >=0, the address is within the image;
120: * addresses within the image are given relative to the start of the image.
121: * If the word =-1 (CF_NIL), the address is NIL,
122: * If the word is <CF_NIL and >CF(DODOES), it's a CFA (:, Create, ...)
123: * If the word =CF(DODOES), it's a DOES> CFA
124: * If the word =CF(DOESJUMP), it's a DOES JUMP (2 Cells after DOES>,
125: * possibly containing a jump to dodoes)
126: * If the word is <CF(DOESJUMP), it's a primitive
127: */
128:
1.46 jwilke 129: void relocate(Cell *image, const char *bitstring,
130: int size, int base, Label symbols[])
1.1 anton 131: {
1.16 pazsan 132: int i=0, j, k, steps=(size/sizeof(Cell))/RELINFOBITS;
1.11 pazsan 133: Cell token;
1.1 anton 134: char bits;
1.37 anton 135: Cell max_symbols;
1.46 jwilke 136: /*
137: * A virtial start address that's the real start address minus
138: * the one in the image
139: */
1.45 jwilke 140: Cell *start = (Cell * ) (((void *) image) - ((void *) base));
1.1 anton 141:
1.46 jwilke 142:
143: /* printf("relocating to %x[%x] start=%x base=%x\n", image, size, start, base); */
1.37 anton 144:
145: for (max_symbols=DOESJUMP+1; symbols[max_symbols]!=0; max_symbols++)
146: ;
1.47 ! anton 147: max_symbols--;
1.35 pazsan 148: size/=sizeof(Cell);
149:
1.31 pazsan 150: for(k=0; k<=steps; k++) {
1.13 pazsan 151: for(j=0, bits=bitstring[k]; j<RELINFOBITS; j++, i++, bits<<=1) {
1.1 anton 152: /* fprintf(stderr,"relocate: image[%d]\n", i);*/
1.35 pazsan 153: if((i < size) && (bits & (1U << (RELINFOBITS-1)))) {
154: /* fprintf(stderr,"relocate: image[%d]=%d of %d\n", i, image[i], size/sizeof(Cell)); */
1.45 jwilke 155: token=image[i];
156: if(token<0)
1.11 pazsan 157: switch(token)
1.1 anton 158: {
159: case CF_NIL : image[i]=0; break;
160: #if !defined(DOUBLY_INDIRECT)
161: case CF(DOCOL) :
162: case CF(DOVAR) :
163: case CF(DOCON) :
164: case CF(DOUSER) :
165: case CF(DODEFER) :
1.11 pazsan 166: case CF(DOFIELD) : MAKE_CF(image+i,symbols[CF(token)]); break;
1.1 anton 167: case CF(DOESJUMP): MAKE_DOES_HANDLER(image+i); break;
168: #endif /* !defined(DOUBLY_INDIRECT) */
169: case CF(DODOES) :
1.45 jwilke 170: MAKE_DOES_CF(image+i,(Xt *)(image[i+1]+((Cell)start)));
1.1 anton 171: break;
172: default :
173: /* printf("Code field generation image[%x]:=CA(%x)\n",
174: i, CF(image[i])); */
1.37 anton 175: if (CF(token)<max_symbols)
176: image[i]=(Cell)CA(CF(token));
177: else
178: fprintf(stderr,"Primitive %d used in this image at $%lx is not implemented by this\n engine (%s); executing this code will crash.\n",CF(token),(long)&image[i],VERSION);
1.1 anton 179: }
1.46 jwilke 180: else {
1.45 jwilke 181: // if base is > 0: 0 is a null reference so don't adjust
182: if (token>=base) {
183: image[i]+=(Cell)start;
184: }
1.46 jwilke 185: }
1.1 anton 186: }
187: }
1.31 pazsan 188: }
1.26 jwilke 189: ((ImageHeader*)(image))->base = (Address) image;
1.1 anton 190: }
191:
192: UCell checksum(Label symbols[])
193: {
194: UCell r=PRIM_VERSION;
195: Cell i;
196:
197: for (i=DOCOL; i<=DOESJUMP; i++) {
198: r ^= (UCell)(symbols[i]);
199: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
200: }
201: #ifdef DIRECT_THREADED
202: /* we have to consider all the primitives */
203: for (; symbols[i]!=(Label)0; i++) {
204: r ^= (UCell)(symbols[i]);
205: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
206: }
207: #else
208: /* in indirect threaded code all primitives are accessed through the
209: symbols table, so we just have to put the base address of symbols
210: in the checksum */
211: r ^= (UCell)symbols;
212: #endif
213: return r;
214: }
215:
1.3 anton 216: Address verbose_malloc(Cell size)
217: {
218: Address r;
219: /* leave a little room (64B) for stack underflows */
220: if ((r = malloc(size+64))==NULL) {
221: perror(progname);
222: exit(1);
223: }
224: r = (Address)((((Cell)r)+(sizeof(Float)-1))&(-sizeof(Float)));
225: if (debug)
226: fprintf(stderr, "malloc succeeds, address=$%lx\n", (long)r);
227: return r;
228: }
229:
1.33 anton 230: static Address next_address=0;
231: void after_alloc(Address r, Cell size)
232: {
233: if (r != (Address)-1) {
234: if (debug)
235: fprintf(stderr, "success, address=$%lx\n", (long) r);
236: if (pagesize != 1)
237: next_address = (Address)(((((Cell)r)+size-1)&-pagesize)+2*pagesize); /* leave one page unmapped */
238: } else {
239: if (debug)
240: fprintf(stderr, "failed: %s\n", strerror(errno));
241: }
242: }
243:
1.34 anton 244: #ifndef MAP_FAILED
245: #define MAP_FAILED ((Address) -1)
246: #endif
247: #ifndef MAP_FILE
248: # define MAP_FILE 0
249: #endif
250: #ifndef MAP_PRIVATE
251: # define MAP_PRIVATE 0
252: #endif
253:
254: #if defined(HAVE_MMAP)
255: static Address alloc_mmap(Cell size)
1.1 anton 256: {
257: Address r;
258:
259: #if defined(MAP_ANON)
260: if (debug)
261: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_ANON, ...); ", (long)next_address, (long)size);
1.34 anton 262: r = mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
1.1 anton 263: #else /* !defined(MAP_ANON) */
1.17 anton 264: /* Ultrix (at least) does not define MAP_FILE and MAP_PRIVATE (both are
265: apparently defaults) */
1.1 anton 266: static int dev_zero=-1;
267:
268: if (dev_zero == -1)
269: dev_zero = open("/dev/zero", O_RDONLY);
270: if (dev_zero == -1) {
1.34 anton 271: r = MAP_FAILED;
1.1 anton 272: if (debug)
273: fprintf(stderr, "open(\"/dev/zero\"...) failed (%s), no mmap; ",
274: strerror(errno));
275: } else {
276: if (debug)
277: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FILE, dev_zero, ...); ", (long)next_address, (long)size);
278: r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FILE|MAP_PRIVATE, dev_zero, 0);
279: }
280: #endif /* !defined(MAP_ANON) */
1.34 anton 281: after_alloc(r, size);
282: return r;
283: }
284: #endif
285:
286: Address my_alloc(Cell size)
287: {
288: #if HAVE_MMAP
289: Address r;
290:
291: r=alloc_mmap(size);
292: if (r!=MAP_FAILED)
1.1 anton 293: return r;
294: #endif /* HAVE_MMAP */
1.3 anton 295: /* use malloc as fallback */
296: return verbose_malloc(size);
1.1 anton 297: }
298:
1.3 anton 299: #if (defined(mips) && !defined(INDIRECT_THREADED))
300: /* the 256MB jump restriction on the MIPS architecture makes the
301: combination of direct threading and mmap unsafe. */
1.33 anton 302: #define mips_dict_alloc 1
1.3 anton 303: #define dict_alloc(size) verbose_malloc(size)
304: #else
305: #define dict_alloc(size) my_alloc(size)
306: #endif
307:
1.34 anton 308: Address dict_alloc_read(FILE *file, Cell imagesize, Cell dictsize, Cell offset)
1.33 anton 309: {
1.34 anton 310: Address image = MAP_FAILED;
1.33 anton 311:
1.34 anton 312: #if defined(HAVE_MMAP) && !defined(mips_dict_alloc)
1.33 anton 313: if (offset==0) {
1.34 anton 314: image=alloc_mmap(dictsize);
1.33 anton 315: if (debug)
1.34 anton 316: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FIXED|MAP_FILE, imagefile, 0); ", (long)image, (long)imagesize);
317: image = mmap(image, imagesize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FIXED|MAP_FILE|MAP_PRIVATE, fileno(file), 0);
318: after_alloc(image,dictsize);
1.33 anton 319: }
1.34 anton 320: #endif /* defined(MAP_ANON) && !defined(mips_dict_alloc) */
321: if (image == MAP_FAILED) {
322: image = dict_alloc(dictsize+offset)+offset;
1.33 anton 323: rewind(file); /* fseek(imagefile,0L,SEEK_SET); */
1.34 anton 324: fread(image, 1, imagesize, file);
1.33 anton 325: }
326: return image;
327: }
328:
1.10 pazsan 329: void set_stack_sizes(ImageHeader * header)
330: {
331: if (dictsize==0)
332: dictsize = header->dict_size;
333: if (dsize==0)
334: dsize = header->data_stack_size;
335: if (rsize==0)
336: rsize = header->return_stack_size;
337: if (fsize==0)
338: fsize = header->fp_stack_size;
339: if (lsize==0)
340: lsize = header->locals_stack_size;
341: dictsize=maxaligned(dictsize);
342: dsize=maxaligned(dsize);
343: rsize=maxaligned(rsize);
344: lsize=maxaligned(lsize);
345: fsize=maxaligned(fsize);
346: }
347:
348: void alloc_stacks(ImageHeader * header)
349: {
350: header->dict_size=dictsize;
351: header->data_stack_size=dsize;
352: header->fp_stack_size=fsize;
353: header->return_stack_size=rsize;
354: header->locals_stack_size=lsize;
355:
356: header->data_stack_base=my_alloc(dsize);
357: header->fp_stack_base=my_alloc(fsize);
358: header->return_stack_base=my_alloc(rsize);
359: header->locals_stack_base=my_alloc(lsize);
360: }
361:
1.44 pazsan 362: #warning You can ignore the warnings about clobbered variables in go_forth
1.11 pazsan 363: int go_forth(Address image, int stack, Cell *entries)
364: {
1.38 anton 365: volatile ImageHeader *image_header = (ImageHeader *)image;
1.18 anton 366: Cell *sp0=(Cell*)(image_header->data_stack_base + dsize);
1.44 pazsan 367: Cell *rp0=(Cell *)(image_header->return_stack_base + rsize);
1.18 anton 368: Float *fp0=(Float *)(image_header->fp_stack_base + fsize);
1.44 pazsan 369: #ifdef GFORTH_DEBUGGING
1.38 anton 370: volatile Cell *orig_rp0=rp0;
1.44 pazsan 371: #endif
1.18 anton 372: Address lp0=image_header->locals_stack_base + lsize;
373: Xt *ip0=(Xt *)(image_header->boot_entry);
1.13 pazsan 374: #ifdef SYSSIGNALS
1.11 pazsan 375: int throw_code;
1.13 pazsan 376: #endif
1.11 pazsan 377:
378: /* ensure that the cached elements (if any) are accessible */
1.41 anton 379: IF_spTOS(sp0--);
380: IF_fpTOS(fp0--);
1.11 pazsan 381:
382: for(;stack>0;stack--)
1.18 anton 383: *--sp0=entries[stack-1];
1.11 pazsan 384:
1.30 pazsan 385: #ifdef SYSSIGNALS
1.11 pazsan 386: get_winsize();
387:
388: install_signal_handlers(); /* right place? */
389:
390: if ((throw_code=setjmp(throw_jmp_buf))) {
391: static Cell signal_data_stack[8];
392: static Cell signal_return_stack[8];
393: static Float signal_fp_stack[1];
1.13 pazsan 394:
1.11 pazsan 395: signal_data_stack[7]=throw_code;
1.18 anton 396:
397: #ifdef GFORTH_DEBUGGING
1.38 anton 398: /* fprintf(stderr,"\nrp=%ld\n",(long)rp); */
399: if (rp <= orig_rp0 && rp > (Cell *)(image_header->return_stack_base+5)) {
1.18 anton 400: /* no rstack overflow or underflow */
401: rp0 = rp;
1.27 anton 402: *--rp0 = (Cell)ip;
1.18 anton 403: }
404: else /* I love non-syntactic ifdefs :-) */
405: #endif
406: rp0 = signal_return_stack+8;
1.25 anton 407: /* fprintf(stderr, "rp=$%x\n",rp0);*/
1.11 pazsan 408:
1.33 anton 409: return((int)(Cell)engine(image_header->throw_entry, signal_data_stack+7,
1.18 anton 410: rp0, signal_fp_stack, 0));
1.11 pazsan 411: }
1.13 pazsan 412: #endif
1.11 pazsan 413:
1.33 anton 414: return((int)(Cell)engine(ip0,sp0,rp0,fp0,lp0));
1.11 pazsan 415: }
416:
1.21 anton 417:
1.30 pazsan 418: #ifndef INCLUDE_IMAGE
1.21 anton 419: void print_sizes(Cell sizebyte)
420: /* print size information */
421: {
422: static char* endianstring[]= { " big","little" };
423:
424: fprintf(stderr,"%s endian, cell=%d bytes, char=%d bytes, au=%d bytes\n",
425: endianstring[sizebyte & 1],
426: 1 << ((sizebyte >> 1) & 3),
427: 1 << ((sizebyte >> 3) & 3),
428: 1 << ((sizebyte >> 5) & 3));
429: }
430:
1.47 ! anton 431: typedef struct {
! 432: Label start;
! 433: Cell length; /* excluding the jump */
! 434: char super_end; /* true if primitive ends superinstruction, i.e.,
! 435: unconditional branch, execute, etc. */
! 436: } PrimInfo;
! 437:
! 438: PrimInfo *priminfos;
! 439:
! 440: void check_prims(Label symbols1[])
! 441: {
! 442: #ifndef DOUBLY_INDIRECT
! 443: int i;
! 444: Label *symbols2=engine2(0,0,0,0,0);
! 445:
! 446: for (i=DOESJUMP+1; symbols1[i+1]!=0; i++)
! 447: ;
! 448: priminfos = calloc(i,sizeof(PrimInfo));
! 449: for (i=DOESJUMP+1; symbols1[i+1]!=0; i++) {
! 450: int prim_len=symbols1[i+1]-symbols1[i];
! 451: PrimInfo *pi=&priminfos[i];
! 452: int j;
! 453: for (j=prim_len-3; ; j--) {
! 454: if (((*(Cell *)(symbols1[i]+j)) & 0xfff8ff) == 0xfc60ff) {
! 455: /* jmp -4(reg), i.e., the NEXT jump */
! 456: prim_len = j;
! 457: break;
! 458: }
! 459: if (j==0) { /* NEXT jump not found, e.g., execute */
! 460: pi->super_end = 1;
! 461: break;
! 462: }
! 463: }
! 464: /* fprintf(stderr,"checking primitive %d: memcmp(%p, %p, %d)\n",
! 465: i, symbols1[i], symbols2[i], prim_len);*/
! 466: if (memcmp(symbols1[i],symbols2[i],prim_len)!=0) {
! 467: if (debug)
! 468: fprintf(stderr,"Primitive %d not relocatable: memcmp(%p, %p, %d)\n",
! 469: i, symbols1[i], symbols2[i], prim_len);
! 470: } else {
! 471: pi->start = symbols1[i];
! 472: pi->length = prim_len;
! 473: if (debug)
! 474: fprintf(stderr,"Primitive %d relocatable: start %p, length %ld, super_end %d\n",
! 475: i, pi->start, pi->length, pi->super_end);
! 476: }
! 477: }
! 478: #endif
! 479: }
! 480:
1.1 anton 481: Address loader(FILE *imagefile, char* filename)
482: /* returns the address of the image proper (after the preamble) */
483: {
484: ImageHeader header;
485: Address image;
486: Address imp; /* image+preamble */
1.17 anton 487: Char magic[8];
488: char magic7; /* size byte of magic number */
1.1 anton 489: Cell preamblesize=0;
1.6 pazsan 490: Cell data_offset = offset_image ? 56*sizeof(Cell) : 0;
1.1 anton 491: UCell check_sum;
1.15 pazsan 492: Cell ausize = ((RELINFOBITS == 8) ? 0 :
493: (RELINFOBITS == 16) ? 1 :
494: (RELINFOBITS == 32) ? 2 : 3);
495: Cell charsize = ((sizeof(Char) == 1) ? 0 :
496: (sizeof(Char) == 2) ? 1 :
497: (sizeof(Char) == 4) ? 2 : 3) + ausize;
498: Cell cellsize = ((sizeof(Cell) == 1) ? 0 :
499: (sizeof(Cell) == 2) ? 1 :
500: (sizeof(Cell) == 4) ? 2 : 3) + ausize;
1.21 anton 501: Cell sizebyte = (ausize << 5) + (charsize << 3) + (cellsize << 1) +
502: #ifdef WORDS_BIGENDIAN
503: 0
504: #else
505: 1
506: #endif
507: ;
1.1 anton 508:
1.43 anton 509: vm_prims = engine(0,0,0,0,0);
1.47 ! anton 510: check_prims(vm_prims);
1.1 anton 511: #ifndef DOUBLY_INDIRECT
1.43 anton 512: check_sum = checksum(vm_prims);
1.1 anton 513: #else /* defined(DOUBLY_INDIRECT) */
1.43 anton 514: check_sum = (UCell)vm_prims;
1.1 anton 515: #endif /* defined(DOUBLY_INDIRECT) */
1.10 pazsan 516:
517: do {
518: if(fread(magic,sizeof(Char),8,imagefile) < 8) {
1.15 pazsan 519: fprintf(stderr,"%s: image %s doesn't seem to be a Gforth (>=0.4) image.\n",
1.10 pazsan 520: progname, filename);
521: exit(1);
1.1 anton 522: }
1.10 pazsan 523: preamblesize+=8;
1.15 pazsan 524: } while(memcmp(magic,"Gforth2",7));
1.17 anton 525: magic7 = magic[7];
1.1 anton 526: if (debug) {
1.17 anton 527: magic[7]='\0';
1.21 anton 528: fprintf(stderr,"Magic found: %s ", magic);
529: print_sizes(magic7);
1.1 anton 530: }
531:
1.21 anton 532: if (magic7 != sizebyte)
533: {
534: fprintf(stderr,"This image is: ");
535: print_sizes(magic7);
536: fprintf(stderr,"whereas the machine is ");
537: print_sizes(sizebyte);
1.1 anton 538: exit(-2);
539: };
540:
541: fread((void *)&header,sizeof(ImageHeader),1,imagefile);
1.10 pazsan 542:
543: set_stack_sizes(&header);
1.1 anton 544:
545: #if HAVE_GETPAGESIZE
546: pagesize=getpagesize(); /* Linux/GNU libc offers this */
547: #elif HAVE_SYSCONF && defined(_SC_PAGESIZE)
548: pagesize=sysconf(_SC_PAGESIZE); /* POSIX.4 */
549: #elif PAGESIZE
550: pagesize=PAGESIZE; /* in limits.h according to Gallmeister's POSIX.4 book */
551: #endif
552: if (debug)
1.5 jwilke 553: fprintf(stderr,"pagesize=%ld\n",(unsigned long) pagesize);
1.1 anton 554:
1.34 anton 555: image = dict_alloc_read(imagefile, preamblesize+header.image_size,
556: preamblesize+dictsize, data_offset);
1.33 anton 557: imp=image+preamblesize;
1.1 anton 558: if (clear_dictionary)
1.33 anton 559: memset(imp+header.image_size, 0, dictsize-header.image_size);
1.46 jwilke 560: if(header.base==0 || header.base == 0x100) {
1.1 anton 561: Cell reloc_size=((header.image_size-1)/sizeof(Cell))/8+1;
562: char reloc_bits[reloc_size];
1.33 anton 563: fseek(imagefile, preamblesize+header.image_size, SEEK_SET);
1.10 pazsan 564: fread(reloc_bits, 1, reloc_size, imagefile);
1.45 jwilke 565: relocate((Cell *)imp, reloc_bits, header.image_size, header.base, vm_prims);
1.1 anton 566: #if 0
567: { /* let's see what the relocator did */
568: FILE *snapshot=fopen("snapshot.fi","wb");
569: fwrite(image,1,imagesize,snapshot);
570: fclose(snapshot);
571: }
572: #endif
1.46 jwilke 573: }
574: else if(header.base!=imp) {
575: fprintf(stderr,"%s: Cannot load nonrelocatable image (compiled for address $%lx) at address $%lx\n",
576: progname, (unsigned long)header.base, (unsigned long)imp);
577: exit(1);
1.1 anton 578: }
579: if (header.checksum==0)
580: ((ImageHeader *)imp)->checksum=check_sum;
581: else if (header.checksum != check_sum) {
582: fprintf(stderr,"%s: Checksum of image ($%lx) does not match the executable ($%lx)\n",
583: progname, (unsigned long)(header.checksum),(unsigned long)check_sum);
584: exit(1);
585: }
586: fclose(imagefile);
587:
1.10 pazsan 588: alloc_stacks((ImageHeader *)imp);
1.1 anton 589:
590: CACHE_FLUSH(imp, header.image_size);
591:
592: return imp;
593: }
594:
1.28 anton 595: /* index of last '/' or '\' in file, 0 if there is none. !! Hmm, could
596: be implemented with strrchr and the separator should be
597: OS-dependent */
1.1 anton 598: int onlypath(char *file)
1.10 pazsan 599: {
600: int i;
1.1 anton 601: i=strlen(file);
1.10 pazsan 602: while (i) {
603: if (file[i]=='\\' || file[i]=='/') break;
604: i--;
605: }
606: return i;
1.1 anton 607: }
608:
609: FILE *openimage(char *fullfilename)
1.10 pazsan 610: {
611: FILE *image_file;
1.28 anton 612: char * expfilename = tilde_cstr(fullfilename, strlen(fullfilename), 1);
1.10 pazsan 613:
1.28 anton 614: image_file=fopen(expfilename,"rb");
1.1 anton 615: if (image_file!=NULL && debug)
1.28 anton 616: fprintf(stderr, "Opened image file: %s\n", expfilename);
1.10 pazsan 617: return image_file;
1.1 anton 618: }
619:
1.28 anton 620: /* try to open image file concat(path[0:len],imagename) */
1.1 anton 621: FILE *checkimage(char *path, int len, char *imagename)
1.10 pazsan 622: {
623: int dirlen=len;
1.1 anton 624: char fullfilename[dirlen+strlen(imagename)+2];
1.10 pazsan 625:
1.1 anton 626: memcpy(fullfilename, path, dirlen);
627: if (fullfilename[dirlen-1]!='/')
628: fullfilename[dirlen++]='/';
629: strcpy(fullfilename+dirlen,imagename);
1.10 pazsan 630: return openimage(fullfilename);
1.1 anton 631: }
632:
1.10 pazsan 633: FILE * open_image_file(char * imagename, char * path)
1.1 anton 634: {
1.10 pazsan 635: FILE * image_file=NULL;
1.28 anton 636: char *origpath=path;
1.10 pazsan 637:
638: if(strchr(imagename, '/')==NULL) {
639: /* first check the directory where the exe file is in !! 01may97jaw */
640: if (onlypath(progname))
641: image_file=checkimage(progname, onlypath(progname), imagename);
642: if (!image_file)
643: do {
644: char *pend=strchr(path, PATHSEP);
645: if (pend==NULL)
646: pend=path+strlen(path);
647: if (strlen(path)==0) break;
648: image_file=checkimage(path, pend-path, imagename);
649: path=pend+(*pend==PATHSEP);
650: } while (image_file==NULL);
651: } else {
652: image_file=openimage(imagename);
653: }
1.1 anton 654:
1.10 pazsan 655: if (!image_file) {
656: fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n",
1.28 anton 657: progname, imagename, origpath);
1.10 pazsan 658: exit(1);
1.7 anton 659: }
660:
1.10 pazsan 661: return image_file;
662: }
1.11 pazsan 663: #endif
664:
665: #ifdef HAS_OS
666: UCell convsize(char *s, UCell elemsize)
667: /* converts s of the format [0-9]+[bekMGT]? (e.g. 25k) into the number
668: of bytes. the letter at the end indicates the unit, where e stands
669: for the element size. default is e */
670: {
671: char *endp;
672: UCell n,m;
673:
674: m = elemsize;
675: n = strtoul(s,&endp,0);
676: if (endp!=NULL) {
677: if (strcmp(endp,"b")==0)
678: m=1;
679: else if (strcmp(endp,"k")==0)
680: m=1024;
681: else if (strcmp(endp,"M")==0)
682: m=1024*1024;
683: else if (strcmp(endp,"G")==0)
684: m=1024*1024*1024;
685: else if (strcmp(endp,"T")==0) {
686: #if (SIZEOF_CHAR_P > 4)
1.24 anton 687: m=1024L*1024*1024*1024;
1.11 pazsan 688: #else
689: fprintf(stderr,"%s: size specification \"%s\" too large for this machine\n", progname, endp);
690: exit(1);
691: #endif
692: } else if (strcmp(endp,"e")!=0 && strcmp(endp,"")!=0) {
693: fprintf(stderr,"%s: cannot grok size specification %s: invalid unit \"%s\"\n", progname, s, endp);
694: exit(1);
695: }
696: }
697: return n*m;
698: }
1.10 pazsan 699:
700: void gforth_args(int argc, char ** argv, char ** path, char ** imagename)
701: {
702: int c;
703:
1.1 anton 704: opterr=0;
705: while (1) {
706: int option_index=0;
707: static struct option opts[] = {
1.29 anton 708: {"appl-image", required_argument, NULL, 'a'},
1.1 anton 709: {"image-file", required_argument, NULL, 'i'},
710: {"dictionary-size", required_argument, NULL, 'm'},
711: {"data-stack-size", required_argument, NULL, 'd'},
712: {"return-stack-size", required_argument, NULL, 'r'},
713: {"fp-stack-size", required_argument, NULL, 'f'},
714: {"locals-stack-size", required_argument, NULL, 'l'},
715: {"path", required_argument, NULL, 'p'},
716: {"version", no_argument, NULL, 'v'},
717: {"help", no_argument, NULL, 'h'},
718: /* put something != 0 into offset_image */
719: {"offset-image", no_argument, &offset_image, 1},
720: {"no-offset-im", no_argument, &offset_image, 0},
721: {"clear-dictionary", no_argument, &clear_dictionary, 1},
1.4 anton 722: {"die-on-signal", no_argument, &die_on_signal, 1},
1.1 anton 723: {"debug", no_argument, &debug, 1},
724: {0,0,0,0}
725: /* no-init-file, no-rc? */
726: };
727:
1.36 pazsan 728: c = getopt_long(argc, argv, "+i:m:d:r:f:l:p:vhoncsx", opts, &option_index);
1.1 anton 729:
730: switch (c) {
1.29 anton 731: case EOF: return;
732: case '?': optind--; return;
733: case 'a': *imagename = optarg; return;
1.10 pazsan 734: case 'i': *imagename = optarg; break;
1.1 anton 735: case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
736: case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
737: case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
738: case 'f': fsize = convsize(optarg,sizeof(Float)); break;
739: case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
1.10 pazsan 740: case 'p': *path = optarg; break;
1.36 pazsan 741: case 'o': offset_image = 1; break;
742: case 'n': offset_image = 0; break;
743: case 'c': clear_dictionary = 1; break;
744: case 's': die_on_signal = 1; break;
745: case 'x': debug = 1; break;
1.8 anton 746: case 'v': fprintf(stderr, "gforth %s\n", VERSION); exit(0);
1.1 anton 747: case 'h':
1.29 anton 748: fprintf(stderr, "Usage: %s [engine options] ['--'] [image arguments]\n\
1.1 anton 749: Engine Options:\n\
1.29 anton 750: --appl-image FILE equivalent to '--image-file=FILE --'\n\
1.10 pazsan 751: --clear-dictionary Initialize the dictionary with 0 bytes\n\
752: -d SIZE, --data-stack-size=SIZE Specify data stack size\n\
753: --debug Print debugging information during startup\n\
754: --die-on-signal exit instead of CATCHing some signals\n\
755: -f SIZE, --fp-stack-size=SIZE Specify floating point stack size\n\
756: -h, --help Print this message and exit\n\
757: -i FILE, --image-file=FILE Use image FILE instead of `gforth.fi'\n\
758: -l SIZE, --locals-stack-size=SIZE Specify locals stack size\n\
759: -m SIZE, --dictionary-size=SIZE Specify Forth dictionary size\n\
760: --no-offset-im Load image at normal position\n\
761: --offset-image Load image at a different position\n\
762: -p PATH, --path=PATH Search path for finding image and sources\n\
763: -r SIZE, --return-stack-size=SIZE Specify return stack size\n\
764: -v, --version Print version and exit\n\
1.1 anton 765: SIZE arguments consist of an integer followed by a unit. The unit can be\n\
1.10 pazsan 766: `b' (byte), `e' (element; default), `k' (KB), `M' (MB), `G' (GB) or `T' (TB).\n",
767: argv[0]);
768: optind--;
769: return;
1.1 anton 770: }
771: }
1.10 pazsan 772: }
1.11 pazsan 773: #endif
1.10 pazsan 774:
775: #ifdef INCLUDE_IMAGE
776: extern Cell image[];
777: extern const char reloc_bits[];
778: #endif
779:
780: int main(int argc, char **argv, char **env)
781: {
1.30 pazsan 782: #ifdef HAS_OS
1.10 pazsan 783: char *path = getenv("GFORTHPATH") ? : DEFAULTPATH;
1.30 pazsan 784: #else
785: char *path = DEFAULTPATH;
786: #endif
1.13 pazsan 787: #ifndef INCLUDE_IMAGE
1.10 pazsan 788: char *imagename="gforth.fi";
789: FILE *image_file;
790: Address image;
791: #endif
792: int retvalue;
793:
794: #if defined(i386) && defined(ALIGNMENT_CHECK) && !defined(DIRECT_THREADED)
795: /* turn on alignment checks on the 486.
796: * on the 386 this should have no effect. */
797: __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
798: /* this is unusable with Linux' libc.4.6.27, because this library is
799: not alignment-clean; we would have to replace some library
800: functions (e.g., memcpy) to make it work. Also GCC doesn't try to keep
801: the stack FP-aligned. */
802: #endif
803:
804: /* buffering of the user output device */
1.11 pazsan 805: #ifdef _IONBF
1.10 pazsan 806: if (isatty(fileno(stdout))) {
807: fflush(stdout);
808: setvbuf(stdout,NULL,_IONBF,0);
1.1 anton 809: }
1.11 pazsan 810: #endif
1.1 anton 811:
1.10 pazsan 812: progname = argv[0];
813:
1.11 pazsan 814: #ifdef HAS_OS
1.10 pazsan 815: gforth_args(argc, argv, &path, &imagename);
1.11 pazsan 816: #endif
1.10 pazsan 817:
818: #ifdef INCLUDE_IMAGE
819: set_stack_sizes((ImageHeader *)image);
1.22 pazsan 820: if(((ImageHeader *)image)->base != image)
821: relocate(image, reloc_bits, ((ImageHeader *)image)->image_size,
822: (Label*)engine(0, 0, 0, 0, 0));
1.10 pazsan 823: alloc_stacks((ImageHeader *)image);
824: #else
825: image_file = open_image_file(imagename, path);
826: image = loader(image_file, imagename);
827: #endif
1.24 anton 828: gforth_header=(ImageHeader *)image; /* used in SIGSEGV handler */
1.1 anton 829:
830: {
1.10 pazsan 831: char path2[strlen(path)+1];
1.1 anton 832: char *p1, *p2;
833: Cell environ[]= {
834: (Cell)argc-(optind-1),
835: (Cell)(argv+(optind-1)),
1.10 pazsan 836: (Cell)strlen(path),
1.1 anton 837: (Cell)path2};
838: argv[optind-1] = progname;
839: /*
840: for (i=0; i<environ[0]; i++)
841: printf("%s\n", ((char **)(environ[1]))[i]);
842: */
843: /* make path OS-independent by replacing path separators with NUL */
1.10 pazsan 844: for (p1=path, p2=path2; *p1!='\0'; p1++, p2++)
1.1 anton 845: if (*p1==PATHSEP)
846: *p2 = '\0';
847: else
848: *p2 = *p1;
849: *p2='\0';
1.10 pazsan 850: retvalue = go_forth(image, 4, environ);
1.42 anton 851: #ifdef VM_PROFILING
852: vm_print_profile(stderr);
853: #endif
1.1 anton 854: deprep_terminal();
855: }
1.13 pazsan 856: return retvalue;
1.1 anton 857: }
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