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