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