Annotation of gforth/engine/main.c, revision 1.36
1.1 anton 1: /* command line interpretation, image loading etc. for Gforth
2:
3:
1.12 anton 4: Copyright (C) 1995,1996,1997,1998 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
20: Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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
1.16 pazsan 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;
1.1 anton 93:
1.30 pazsan 94: #ifdef MEMCMP_AS_SUBROUTINE
95: int gforth_memcmp(const char * s1, const char * s2, size_t n)
96: {
97: return memcmp(s1, s2, n);
98: }
99: #endif
100:
1.1 anton 101: /* image file format:
1.15 pazsan 102: * "#! binary-path -i\n" (e.g., "#! /usr/local/bin/gforth-0.4.0 -i\n")
1.1 anton 103: * padding to a multiple of 8
1.15 pazsan 104: * magic: "Gforth2x" means format 0.4,
105: * where x is a byte with
106: * bit 7: reserved = 0
107: * bit 6:5: address unit size 2^n octets
108: * bit 4:3: character size 2^n octets
109: * bit 2:1: cell size 2^n octets
110: * bit 0: endian, big=0, little=1.
111: * The magic are always 8 octets, no matter what the native AU/character size is
1.1 anton 112: * padding to max alignment (no padding necessary on current machines)
1.24 anton 113: * ImageHeader structure (see forth.h)
1.1 anton 114: * data (size in ImageHeader.image_size)
115: * tags ((if relocatable, 1 bit/data cell)
116: *
117: * tag==1 means that the corresponding word is an address;
118: * If the word is >=0, the address is within the image;
119: * addresses within the image are given relative to the start of the image.
120: * If the word =-1 (CF_NIL), the address is NIL,
121: * If the word is <CF_NIL and >CF(DODOES), it's a CFA (:, Create, ...)
122: * If the word =CF(DODOES), it's a DOES> CFA
123: * If the word =CF(DOESJUMP), it's a DOES JUMP (2 Cells after DOES>,
124: * possibly containing a jump to dodoes)
125: * If the word is <CF(DOESJUMP), it's a primitive
126: */
127:
1.10 pazsan 128: void relocate(Cell *image, const char *bitstring, int size, Label symbols[])
1.1 anton 129: {
1.16 pazsan 130: int i=0, j, k, steps=(size/sizeof(Cell))/RELINFOBITS;
1.11 pazsan 131: Cell token;
1.1 anton 132: char bits;
133:
134: /* printf("relocating %x[%x]\n", image, size); */
135:
1.35 pazsan 136: size/=sizeof(Cell);
137:
1.31 pazsan 138: for(k=0; k<=steps; k++) {
1.13 pazsan 139: for(j=0, bits=bitstring[k]; j<RELINFOBITS; j++, i++, bits<<=1) {
1.1 anton 140: /* fprintf(stderr,"relocate: image[%d]\n", i);*/
1.35 pazsan 141: if((i < size) && (bits & (1U << (RELINFOBITS-1)))) {
142: /* fprintf(stderr,"relocate: image[%d]=%d of %d\n", i, image[i], size/sizeof(Cell)); */
1.11 pazsan 143: if((token=image[i])<0)
144: switch(token)
1.1 anton 145: {
146: case CF_NIL : image[i]=0; break;
147: #if !defined(DOUBLY_INDIRECT)
148: case CF(DOCOL) :
149: case CF(DOVAR) :
150: case CF(DOCON) :
151: case CF(DOUSER) :
152: case CF(DODEFER) :
1.11 pazsan 153: case CF(DOFIELD) : MAKE_CF(image+i,symbols[CF(token)]); break;
1.1 anton 154: case CF(DOESJUMP): MAKE_DOES_HANDLER(image+i); break;
155: #endif /* !defined(DOUBLY_INDIRECT) */
156: case CF(DODOES) :
1.33 anton 157: MAKE_DOES_CF(image+i,(Xt *)(image[i+1]+((Cell)image)));
1.1 anton 158: break;
159: default :
160: /* printf("Code field generation image[%x]:=CA(%x)\n",
161: i, CF(image[i])); */
1.11 pazsan 162: image[i]=(Cell)CA(CF(token));
1.1 anton 163: }
164: else
165: image[i]+=(Cell)image;
166: }
167: }
1.31 pazsan 168: }
1.26 jwilke 169: ((ImageHeader*)(image))->base = (Address) image;
1.1 anton 170: }
171:
172: UCell checksum(Label symbols[])
173: {
174: UCell r=PRIM_VERSION;
175: Cell i;
176:
177: for (i=DOCOL; i<=DOESJUMP; i++) {
178: r ^= (UCell)(symbols[i]);
179: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
180: }
181: #ifdef DIRECT_THREADED
182: /* we have to consider all the primitives */
183: for (; symbols[i]!=(Label)0; i++) {
184: r ^= (UCell)(symbols[i]);
185: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
186: }
187: #else
188: /* in indirect threaded code all primitives are accessed through the
189: symbols table, so we just have to put the base address of symbols
190: in the checksum */
191: r ^= (UCell)symbols;
192: #endif
193: return r;
194: }
195:
1.3 anton 196: Address verbose_malloc(Cell size)
197: {
198: Address r;
199: /* leave a little room (64B) for stack underflows */
200: if ((r = malloc(size+64))==NULL) {
201: perror(progname);
202: exit(1);
203: }
204: r = (Address)((((Cell)r)+(sizeof(Float)-1))&(-sizeof(Float)));
205: if (debug)
206: fprintf(stderr, "malloc succeeds, address=$%lx\n", (long)r);
207: return r;
208: }
209:
1.33 anton 210: static Address next_address=0;
211: void after_alloc(Address r, Cell size)
212: {
213: if (r != (Address)-1) {
214: if (debug)
215: fprintf(stderr, "success, address=$%lx\n", (long) r);
216: if (pagesize != 1)
217: next_address = (Address)(((((Cell)r)+size-1)&-pagesize)+2*pagesize); /* leave one page unmapped */
218: } else {
219: if (debug)
220: fprintf(stderr, "failed: %s\n", strerror(errno));
221: }
222: }
223:
1.34 anton 224: #ifndef MAP_FAILED
225: #define MAP_FAILED ((Address) -1)
226: #endif
227: #ifndef MAP_FILE
228: # define MAP_FILE 0
229: #endif
230: #ifndef MAP_PRIVATE
231: # define MAP_PRIVATE 0
232: #endif
233:
234: #if defined(HAVE_MMAP)
235: static Address alloc_mmap(Cell size)
1.1 anton 236: {
237: Address r;
238:
239: #if defined(MAP_ANON)
240: if (debug)
241: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_ANON, ...); ", (long)next_address, (long)size);
1.34 anton 242: r = mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
1.1 anton 243: #else /* !defined(MAP_ANON) */
1.17 anton 244: /* Ultrix (at least) does not define MAP_FILE and MAP_PRIVATE (both are
245: apparently defaults) */
1.1 anton 246: static int dev_zero=-1;
247:
248: if (dev_zero == -1)
249: dev_zero = open("/dev/zero", O_RDONLY);
250: if (dev_zero == -1) {
1.34 anton 251: r = MAP_FAILED;
1.1 anton 252: if (debug)
253: fprintf(stderr, "open(\"/dev/zero\"...) failed (%s), no mmap; ",
254: strerror(errno));
255: } else {
256: if (debug)
257: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FILE, dev_zero, ...); ", (long)next_address, (long)size);
258: r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FILE|MAP_PRIVATE, dev_zero, 0);
259: }
260: #endif /* !defined(MAP_ANON) */
1.34 anton 261: after_alloc(r, size);
262: return r;
263: }
264: #endif
265:
266: Address my_alloc(Cell size)
267: {
268: #if HAVE_MMAP
269: Address r;
270:
271: r=alloc_mmap(size);
272: if (r!=MAP_FAILED)
1.1 anton 273: return r;
274: #endif /* HAVE_MMAP */
1.3 anton 275: /* use malloc as fallback */
276: return verbose_malloc(size);
1.1 anton 277: }
278:
1.3 anton 279: #if (defined(mips) && !defined(INDIRECT_THREADED))
280: /* the 256MB jump restriction on the MIPS architecture makes the
281: combination of direct threading and mmap unsafe. */
1.33 anton 282: #define mips_dict_alloc 1
1.3 anton 283: #define dict_alloc(size) verbose_malloc(size)
284: #else
285: #define dict_alloc(size) my_alloc(size)
286: #endif
287:
1.34 anton 288: Address dict_alloc_read(FILE *file, Cell imagesize, Cell dictsize, Cell offset)
1.33 anton 289: {
1.34 anton 290: Address image = MAP_FAILED;
1.33 anton 291:
1.34 anton 292: #if defined(HAVE_MMAP) && !defined(mips_dict_alloc)
1.33 anton 293: if (offset==0) {
1.34 anton 294: image=alloc_mmap(dictsize);
1.33 anton 295: if (debug)
1.34 anton 296: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FIXED|MAP_FILE, imagefile, 0); ", (long)image, (long)imagesize);
297: image = mmap(image, imagesize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FIXED|MAP_FILE|MAP_PRIVATE, fileno(file), 0);
298: after_alloc(image,dictsize);
1.33 anton 299: }
1.34 anton 300: #endif /* defined(MAP_ANON) && !defined(mips_dict_alloc) */
301: if (image == MAP_FAILED) {
302: image = dict_alloc(dictsize+offset)+offset;
1.33 anton 303: rewind(file); /* fseek(imagefile,0L,SEEK_SET); */
1.34 anton 304: fread(image, 1, imagesize, file);
1.33 anton 305: }
306: return image;
307: }
308:
1.10 pazsan 309: void set_stack_sizes(ImageHeader * header)
310: {
311: if (dictsize==0)
312: dictsize = header->dict_size;
313: if (dsize==0)
314: dsize = header->data_stack_size;
315: if (rsize==0)
316: rsize = header->return_stack_size;
317: if (fsize==0)
318: fsize = header->fp_stack_size;
319: if (lsize==0)
320: lsize = header->locals_stack_size;
321: dictsize=maxaligned(dictsize);
322: dsize=maxaligned(dsize);
323: rsize=maxaligned(rsize);
324: lsize=maxaligned(lsize);
325: fsize=maxaligned(fsize);
326: }
327:
328: void alloc_stacks(ImageHeader * header)
329: {
330: header->dict_size=dictsize;
331: header->data_stack_size=dsize;
332: header->fp_stack_size=fsize;
333: header->return_stack_size=rsize;
334: header->locals_stack_size=lsize;
335:
336: header->data_stack_base=my_alloc(dsize);
337: header->fp_stack_base=my_alloc(fsize);
338: header->return_stack_base=my_alloc(rsize);
339: header->locals_stack_base=my_alloc(lsize);
340: }
341:
1.11 pazsan 342: int go_forth(Address image, int stack, Cell *entries)
343: {
1.18 anton 344: ImageHeader *image_header = (ImageHeader *)image;
345: Cell *sp0=(Cell*)(image_header->data_stack_base + dsize);
346: Float *fp0=(Float *)(image_header->fp_stack_base + fsize);
347: Cell *rp0=(Cell *)(image_header->return_stack_base + rsize);
348: Address lp0=image_header->locals_stack_base + lsize;
349: Xt *ip0=(Xt *)(image_header->boot_entry);
1.13 pazsan 350: #ifdef SYSSIGNALS
1.11 pazsan 351: int throw_code;
1.13 pazsan 352: #endif
1.11 pazsan 353:
354: /* ensure that the cached elements (if any) are accessible */
1.18 anton 355: IF_TOS(sp0--);
356: IF_FTOS(fp0--);
1.11 pazsan 357:
358: for(;stack>0;stack--)
1.18 anton 359: *--sp0=entries[stack-1];
1.11 pazsan 360:
1.30 pazsan 361: #ifdef SYSSIGNALS
1.11 pazsan 362: get_winsize();
363:
364: install_signal_handlers(); /* right place? */
365:
366: if ((throw_code=setjmp(throw_jmp_buf))) {
367: static Cell signal_data_stack[8];
368: static Cell signal_return_stack[8];
369: static Float signal_fp_stack[1];
1.13 pazsan 370:
1.11 pazsan 371: signal_data_stack[7]=throw_code;
1.18 anton 372:
373: #ifdef GFORTH_DEBUGGING
374: if (rp <= rp0 && rp > (Cell *)(image_header->return_stack_base+5)) {
375: /* no rstack overflow or underflow */
376: rp0 = rp;
1.27 anton 377: *--rp0 = (Cell)ip;
1.18 anton 378: }
379: else /* I love non-syntactic ifdefs :-) */
380: #endif
381: rp0 = signal_return_stack+8;
1.25 anton 382: /* fprintf(stderr, "rp=$%x\n",rp0);*/
1.11 pazsan 383:
1.33 anton 384: return((int)(Cell)engine(image_header->throw_entry, signal_data_stack+7,
1.18 anton 385: rp0, signal_fp_stack, 0));
1.11 pazsan 386: }
1.13 pazsan 387: #endif
1.11 pazsan 388:
1.33 anton 389: return((int)(Cell)engine(ip0,sp0,rp0,fp0,lp0));
1.11 pazsan 390: }
391:
1.21 anton 392:
1.30 pazsan 393: #ifndef INCLUDE_IMAGE
1.21 anton 394: void print_sizes(Cell sizebyte)
395: /* print size information */
396: {
397: static char* endianstring[]= { " big","little" };
398:
399: fprintf(stderr,"%s endian, cell=%d bytes, char=%d bytes, au=%d bytes\n",
400: endianstring[sizebyte & 1],
401: 1 << ((sizebyte >> 1) & 3),
402: 1 << ((sizebyte >> 3) & 3),
403: 1 << ((sizebyte >> 5) & 3));
404: }
405:
1.1 anton 406: Address loader(FILE *imagefile, char* filename)
407: /* returns the address of the image proper (after the preamble) */
408: {
409: ImageHeader header;
410: Address image;
411: Address imp; /* image+preamble */
1.17 anton 412: Char magic[8];
413: char magic7; /* size byte of magic number */
1.1 anton 414: Cell preamblesize=0;
415: Label *symbols = engine(0,0,0,0,0);
1.6 pazsan 416: Cell data_offset = offset_image ? 56*sizeof(Cell) : 0;
1.1 anton 417: UCell check_sum;
1.15 pazsan 418: Cell ausize = ((RELINFOBITS == 8) ? 0 :
419: (RELINFOBITS == 16) ? 1 :
420: (RELINFOBITS == 32) ? 2 : 3);
421: Cell charsize = ((sizeof(Char) == 1) ? 0 :
422: (sizeof(Char) == 2) ? 1 :
423: (sizeof(Char) == 4) ? 2 : 3) + ausize;
424: Cell cellsize = ((sizeof(Cell) == 1) ? 0 :
425: (sizeof(Cell) == 2) ? 1 :
426: (sizeof(Cell) == 4) ? 2 : 3) + ausize;
1.21 anton 427: Cell sizebyte = (ausize << 5) + (charsize << 3) + (cellsize << 1) +
428: #ifdef WORDS_BIGENDIAN
429: 0
430: #else
431: 1
432: #endif
433: ;
1.1 anton 434:
435: #ifndef DOUBLY_INDIRECT
436: check_sum = checksum(symbols);
437: #else /* defined(DOUBLY_INDIRECT) */
438: check_sum = (UCell)symbols;
439: #endif /* defined(DOUBLY_INDIRECT) */
1.10 pazsan 440:
441: do {
442: if(fread(magic,sizeof(Char),8,imagefile) < 8) {
1.15 pazsan 443: fprintf(stderr,"%s: image %s doesn't seem to be a Gforth (>=0.4) image.\n",
1.10 pazsan 444: progname, filename);
445: exit(1);
1.1 anton 446: }
1.10 pazsan 447: preamblesize+=8;
1.15 pazsan 448: } while(memcmp(magic,"Gforth2",7));
1.17 anton 449: magic7 = magic[7];
1.1 anton 450: if (debug) {
1.17 anton 451: magic[7]='\0';
1.21 anton 452: fprintf(stderr,"Magic found: %s ", magic);
453: print_sizes(magic7);
1.1 anton 454: }
455:
1.21 anton 456: if (magic7 != sizebyte)
457: {
458: fprintf(stderr,"This image is: ");
459: print_sizes(magic7);
460: fprintf(stderr,"whereas the machine is ");
461: print_sizes(sizebyte);
1.1 anton 462: exit(-2);
463: };
464:
465: fread((void *)&header,sizeof(ImageHeader),1,imagefile);
1.10 pazsan 466:
467: set_stack_sizes(&header);
1.1 anton 468:
469: #if HAVE_GETPAGESIZE
470: pagesize=getpagesize(); /* Linux/GNU libc offers this */
471: #elif HAVE_SYSCONF && defined(_SC_PAGESIZE)
472: pagesize=sysconf(_SC_PAGESIZE); /* POSIX.4 */
473: #elif PAGESIZE
474: pagesize=PAGESIZE; /* in limits.h according to Gallmeister's POSIX.4 book */
475: #endif
476: if (debug)
1.5 jwilke 477: fprintf(stderr,"pagesize=%ld\n",(unsigned long) pagesize);
1.1 anton 478:
1.34 anton 479: image = dict_alloc_read(imagefile, preamblesize+header.image_size,
480: preamblesize+dictsize, data_offset);
1.33 anton 481: imp=image+preamblesize;
1.1 anton 482: if (clear_dictionary)
1.33 anton 483: memset(imp+header.image_size, 0, dictsize-header.image_size);
1.1 anton 484: if(header.base==0) {
485: Cell reloc_size=((header.image_size-1)/sizeof(Cell))/8+1;
486: char reloc_bits[reloc_size];
1.33 anton 487: fseek(imagefile, preamblesize+header.image_size, SEEK_SET);
1.10 pazsan 488: fread(reloc_bits, 1, reloc_size, imagefile);
489: relocate((Cell *)imp, reloc_bits, header.image_size, symbols);
1.1 anton 490: #if 0
491: { /* let's see what the relocator did */
492: FILE *snapshot=fopen("snapshot.fi","wb");
493: fwrite(image,1,imagesize,snapshot);
494: fclose(snapshot);
495: }
496: #endif
497: }
498: else if(header.base!=imp) {
499: fprintf(stderr,"%s: Cannot load nonrelocatable image (compiled for address $%lx) at address $%lx\n",
500: progname, (unsigned long)header.base, (unsigned long)imp);
501: exit(1);
502: }
503: if (header.checksum==0)
504: ((ImageHeader *)imp)->checksum=check_sum;
505: else if (header.checksum != check_sum) {
506: fprintf(stderr,"%s: Checksum of image ($%lx) does not match the executable ($%lx)\n",
507: progname, (unsigned long)(header.checksum),(unsigned long)check_sum);
508: exit(1);
509: }
510: fclose(imagefile);
511:
1.10 pazsan 512: alloc_stacks((ImageHeader *)imp);
1.1 anton 513:
514: CACHE_FLUSH(imp, header.image_size);
515:
516: return imp;
517: }
518:
1.28 anton 519: /* index of last '/' or '\' in file, 0 if there is none. !! Hmm, could
520: be implemented with strrchr and the separator should be
521: OS-dependent */
1.1 anton 522: int onlypath(char *file)
1.10 pazsan 523: {
524: int i;
1.1 anton 525: i=strlen(file);
1.10 pazsan 526: while (i) {
527: if (file[i]=='\\' || file[i]=='/') break;
528: i--;
529: }
530: return i;
1.1 anton 531: }
532:
533: FILE *openimage(char *fullfilename)
1.10 pazsan 534: {
535: FILE *image_file;
1.28 anton 536: char * expfilename = tilde_cstr(fullfilename, strlen(fullfilename), 1);
1.10 pazsan 537:
1.28 anton 538: image_file=fopen(expfilename,"rb");
1.1 anton 539: if (image_file!=NULL && debug)
1.28 anton 540: fprintf(stderr, "Opened image file: %s\n", expfilename);
1.10 pazsan 541: return image_file;
1.1 anton 542: }
543:
1.28 anton 544: /* try to open image file concat(path[0:len],imagename) */
1.1 anton 545: FILE *checkimage(char *path, int len, char *imagename)
1.10 pazsan 546: {
547: int dirlen=len;
1.1 anton 548: char fullfilename[dirlen+strlen(imagename)+2];
1.10 pazsan 549:
1.1 anton 550: memcpy(fullfilename, path, dirlen);
551: if (fullfilename[dirlen-1]!='/')
552: fullfilename[dirlen++]='/';
553: strcpy(fullfilename+dirlen,imagename);
1.10 pazsan 554: return openimage(fullfilename);
1.1 anton 555: }
556:
1.10 pazsan 557: FILE * open_image_file(char * imagename, char * path)
1.1 anton 558: {
1.10 pazsan 559: FILE * image_file=NULL;
1.28 anton 560: char *origpath=path;
1.10 pazsan 561:
562: if(strchr(imagename, '/')==NULL) {
563: /* first check the directory where the exe file is in !! 01may97jaw */
564: if (onlypath(progname))
565: image_file=checkimage(progname, onlypath(progname), imagename);
566: if (!image_file)
567: do {
568: char *pend=strchr(path, PATHSEP);
569: if (pend==NULL)
570: pend=path+strlen(path);
571: if (strlen(path)==0) break;
572: image_file=checkimage(path, pend-path, imagename);
573: path=pend+(*pend==PATHSEP);
574: } while (image_file==NULL);
575: } else {
576: image_file=openimage(imagename);
577: }
1.1 anton 578:
1.10 pazsan 579: if (!image_file) {
580: fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n",
1.28 anton 581: progname, imagename, origpath);
1.10 pazsan 582: exit(1);
1.7 anton 583: }
584:
1.10 pazsan 585: return image_file;
586: }
1.11 pazsan 587: #endif
588:
589: #ifdef HAS_OS
590: UCell convsize(char *s, UCell elemsize)
591: /* converts s of the format [0-9]+[bekMGT]? (e.g. 25k) into the number
592: of bytes. the letter at the end indicates the unit, where e stands
593: for the element size. default is e */
594: {
595: char *endp;
596: UCell n,m;
597:
598: m = elemsize;
599: n = strtoul(s,&endp,0);
600: if (endp!=NULL) {
601: if (strcmp(endp,"b")==0)
602: m=1;
603: else if (strcmp(endp,"k")==0)
604: m=1024;
605: else if (strcmp(endp,"M")==0)
606: m=1024*1024;
607: else if (strcmp(endp,"G")==0)
608: m=1024*1024*1024;
609: else if (strcmp(endp,"T")==0) {
610: #if (SIZEOF_CHAR_P > 4)
1.24 anton 611: m=1024L*1024*1024*1024;
1.11 pazsan 612: #else
613: fprintf(stderr,"%s: size specification \"%s\" too large for this machine\n", progname, endp);
614: exit(1);
615: #endif
616: } else if (strcmp(endp,"e")!=0 && strcmp(endp,"")!=0) {
617: fprintf(stderr,"%s: cannot grok size specification %s: invalid unit \"%s\"\n", progname, s, endp);
618: exit(1);
619: }
620: }
621: return n*m;
622: }
1.10 pazsan 623:
624: void gforth_args(int argc, char ** argv, char ** path, char ** imagename)
625: {
626: int c;
627:
1.1 anton 628: opterr=0;
629: while (1) {
630: int option_index=0;
631: static struct option opts[] = {
1.29 anton 632: {"appl-image", required_argument, NULL, 'a'},
1.1 anton 633: {"image-file", required_argument, NULL, 'i'},
634: {"dictionary-size", required_argument, NULL, 'm'},
635: {"data-stack-size", required_argument, NULL, 'd'},
636: {"return-stack-size", required_argument, NULL, 'r'},
637: {"fp-stack-size", required_argument, NULL, 'f'},
638: {"locals-stack-size", required_argument, NULL, 'l'},
639: {"path", required_argument, NULL, 'p'},
640: {"version", no_argument, NULL, 'v'},
641: {"help", no_argument, NULL, 'h'},
642: /* put something != 0 into offset_image */
643: {"offset-image", no_argument, &offset_image, 1},
644: {"no-offset-im", no_argument, &offset_image, 0},
645: {"clear-dictionary", no_argument, &clear_dictionary, 1},
1.4 anton 646: {"die-on-signal", no_argument, &die_on_signal, 1},
1.1 anton 647: {"debug", no_argument, &debug, 1},
648: {0,0,0,0}
649: /* no-init-file, no-rc? */
650: };
651:
1.36 ! pazsan 652: c = getopt_long(argc, argv, "+i:m:d:r:f:l:p:vhoncsx", opts, &option_index);
1.1 anton 653:
654: switch (c) {
1.29 anton 655: case EOF: return;
656: case '?': optind--; return;
657: case 'a': *imagename = optarg; return;
1.10 pazsan 658: case 'i': *imagename = optarg; break;
1.1 anton 659: case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
660: case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
661: case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
662: case 'f': fsize = convsize(optarg,sizeof(Float)); break;
663: case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
1.10 pazsan 664: case 'p': *path = optarg; break;
1.36 ! pazsan 665: case 'o': offset_image = 1; break;
! 666: case 'n': offset_image = 0; break;
! 667: case 'c': clear_dictionary = 1; break;
! 668: case 's': die_on_signal = 1; break;
! 669: case 'x': debug = 1; break;
1.8 anton 670: case 'v': fprintf(stderr, "gforth %s\n", VERSION); exit(0);
1.1 anton 671: case 'h':
1.29 anton 672: fprintf(stderr, "Usage: %s [engine options] ['--'] [image arguments]\n\
1.1 anton 673: Engine Options:\n\
1.29 anton 674: --appl-image FILE equivalent to '--image-file=FILE --'\n\
1.10 pazsan 675: --clear-dictionary Initialize the dictionary with 0 bytes\n\
676: -d SIZE, --data-stack-size=SIZE Specify data stack size\n\
677: --debug Print debugging information during startup\n\
678: --die-on-signal exit instead of CATCHing some signals\n\
679: -f SIZE, --fp-stack-size=SIZE Specify floating point stack size\n\
680: -h, --help Print this message and exit\n\
681: -i FILE, --image-file=FILE Use image FILE instead of `gforth.fi'\n\
682: -l SIZE, --locals-stack-size=SIZE Specify locals stack size\n\
683: -m SIZE, --dictionary-size=SIZE Specify Forth dictionary size\n\
684: --no-offset-im Load image at normal position\n\
685: --offset-image Load image at a different position\n\
686: -p PATH, --path=PATH Search path for finding image and sources\n\
687: -r SIZE, --return-stack-size=SIZE Specify return stack size\n\
688: -v, --version Print version and exit\n\
1.1 anton 689: SIZE arguments consist of an integer followed by a unit. The unit can be\n\
1.10 pazsan 690: `b' (byte), `e' (element; default), `k' (KB), `M' (MB), `G' (GB) or `T' (TB).\n",
691: argv[0]);
692: optind--;
693: return;
1.1 anton 694: }
695: }
1.10 pazsan 696: }
1.11 pazsan 697: #endif
1.10 pazsan 698:
699: #ifdef INCLUDE_IMAGE
700: extern Cell image[];
701: extern const char reloc_bits[];
702: #endif
703:
704: int main(int argc, char **argv, char **env)
705: {
1.30 pazsan 706: #ifdef HAS_OS
1.10 pazsan 707: char *path = getenv("GFORTHPATH") ? : DEFAULTPATH;
1.30 pazsan 708: #else
709: char *path = DEFAULTPATH;
710: #endif
1.13 pazsan 711: #ifndef INCLUDE_IMAGE
1.10 pazsan 712: char *imagename="gforth.fi";
713: FILE *image_file;
714: Address image;
715: #endif
716: int retvalue;
717:
718: #if defined(i386) && defined(ALIGNMENT_CHECK) && !defined(DIRECT_THREADED)
719: /* turn on alignment checks on the 486.
720: * on the 386 this should have no effect. */
721: __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
722: /* this is unusable with Linux' libc.4.6.27, because this library is
723: not alignment-clean; we would have to replace some library
724: functions (e.g., memcpy) to make it work. Also GCC doesn't try to keep
725: the stack FP-aligned. */
726: #endif
727:
728: /* buffering of the user output device */
1.11 pazsan 729: #ifdef _IONBF
1.10 pazsan 730: if (isatty(fileno(stdout))) {
731: fflush(stdout);
732: setvbuf(stdout,NULL,_IONBF,0);
1.1 anton 733: }
1.11 pazsan 734: #endif
1.1 anton 735:
1.10 pazsan 736: progname = argv[0];
737:
1.11 pazsan 738: #ifdef HAS_OS
1.10 pazsan 739: gforth_args(argc, argv, &path, &imagename);
1.11 pazsan 740: #endif
1.10 pazsan 741:
742: #ifdef INCLUDE_IMAGE
743: set_stack_sizes((ImageHeader *)image);
1.22 pazsan 744: if(((ImageHeader *)image)->base != image)
745: relocate(image, reloc_bits, ((ImageHeader *)image)->image_size,
746: (Label*)engine(0, 0, 0, 0, 0));
1.10 pazsan 747: alloc_stacks((ImageHeader *)image);
748: #else
749: image_file = open_image_file(imagename, path);
750: image = loader(image_file, imagename);
751: #endif
1.24 anton 752: gforth_header=(ImageHeader *)image; /* used in SIGSEGV handler */
1.1 anton 753:
754: {
1.10 pazsan 755: char path2[strlen(path)+1];
1.1 anton 756: char *p1, *p2;
757: Cell environ[]= {
758: (Cell)argc-(optind-1),
759: (Cell)(argv+(optind-1)),
1.10 pazsan 760: (Cell)strlen(path),
1.1 anton 761: (Cell)path2};
762: argv[optind-1] = progname;
763: /*
764: for (i=0; i<environ[0]; i++)
765: printf("%s\n", ((char **)(environ[1]))[i]);
766: */
767: /* make path OS-independent by replacing path separators with NUL */
1.10 pazsan 768: for (p1=path, p2=path2; *p1!='\0'; p1++, p2++)
1.1 anton 769: if (*p1==PATHSEP)
770: *p2 = '\0';
771: else
772: *p2 = *p1;
773: *p2='\0';
1.10 pazsan 774: retvalue = go_forth(image, 4, environ);
1.1 anton 775: deprep_terminal();
776: }
1.13 pazsan 777: return retvalue;
1.1 anton 778: }
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