Annotation of gforth/engine/main.c, revision 1.51
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:
1.48 anton 84: Address code_area=0;
85: Address code_here=0; /* does for code-area what HERE does for the dictionary */
86:
1.30 pazsan 87: #ifdef HAS_DEBUG
1.1 anton 88: static int debug=0;
1.31 pazsan 89: #else
90: # define debug 0
91: # define perror(x...)
92: # define fprintf(x...)
1.30 pazsan 93: #endif
1.31 pazsan 94:
1.24 anton 95: ImageHeader *gforth_header;
1.43 anton 96: Label *vm_prims;
1.1 anton 97:
1.30 pazsan 98: #ifdef MEMCMP_AS_SUBROUTINE
99: int gforth_memcmp(const char * s1, const char * s2, size_t n)
100: {
101: return memcmp(s1, s2, n);
102: }
103: #endif
104:
1.1 anton 105: /* image file format:
1.15 pazsan 106: * "#! binary-path -i\n" (e.g., "#! /usr/local/bin/gforth-0.4.0 -i\n")
1.1 anton 107: * padding to a multiple of 8
1.15 pazsan 108: * magic: "Gforth2x" means format 0.4,
109: * where x is a byte with
110: * bit 7: reserved = 0
111: * bit 6:5: address unit size 2^n octets
112: * bit 4:3: character size 2^n octets
113: * bit 2:1: cell size 2^n octets
114: * bit 0: endian, big=0, little=1.
115: * The magic are always 8 octets, no matter what the native AU/character size is
1.1 anton 116: * padding to max alignment (no padding necessary on current machines)
1.24 anton 117: * ImageHeader structure (see forth.h)
1.1 anton 118: * data (size in ImageHeader.image_size)
119: * tags ((if relocatable, 1 bit/data cell)
120: *
121: * tag==1 means that the corresponding word is an address;
122: * If the word is >=0, the address is within the image;
123: * addresses within the image are given relative to the start of the image.
124: * If the word =-1 (CF_NIL), the address is NIL,
125: * If the word is <CF_NIL and >CF(DODOES), it's a CFA (:, Create, ...)
126: * If the word =CF(DODOES), it's a DOES> CFA
127: * If the word =CF(DOESJUMP), it's a DOES JUMP (2 Cells after DOES>,
128: * possibly containing a jump to dodoes)
1.51 ! anton 129: * If the word is <CF(DOESJUMP) and bit 14 is set, it's the xt of a primitive
! 130: * If the word is <CF(DOESJUMP) and bit 14 is clear,
! 131: * it's the threaded code of a primitive
1.1 anton 132: */
133:
1.46 jwilke 134: void relocate(Cell *image, const char *bitstring,
135: int size, int base, Label symbols[])
1.1 anton 136: {
1.16 pazsan 137: int i=0, j, k, steps=(size/sizeof(Cell))/RELINFOBITS;
1.11 pazsan 138: Cell token;
1.1 anton 139: char bits;
1.37 anton 140: Cell max_symbols;
1.46 jwilke 141: /*
142: * A virtial start address that's the real start address minus
143: * the one in the image
144: */
1.45 jwilke 145: Cell *start = (Cell * ) (((void *) image) - ((void *) base));
1.1 anton 146:
1.46 jwilke 147:
148: /* printf("relocating to %x[%x] start=%x base=%x\n", image, size, start, base); */
1.37 anton 149:
150: for (max_symbols=DOESJUMP+1; symbols[max_symbols]!=0; max_symbols++)
151: ;
1.47 anton 152: max_symbols--;
1.35 pazsan 153: size/=sizeof(Cell);
154:
1.31 pazsan 155: for(k=0; k<=steps; k++) {
1.13 pazsan 156: for(j=0, bits=bitstring[k]; j<RELINFOBITS; j++, i++, bits<<=1) {
1.1 anton 157: /* fprintf(stderr,"relocate: image[%d]\n", i);*/
1.35 pazsan 158: if((i < size) && (bits & (1U << (RELINFOBITS-1)))) {
159: /* fprintf(stderr,"relocate: image[%d]=%d of %d\n", i, image[i], size/sizeof(Cell)); */
1.45 jwilke 160: token=image[i];
161: if(token<0)
1.11 pazsan 162: switch(token)
1.1 anton 163: {
164: case CF_NIL : image[i]=0; break;
165: #if !defined(DOUBLY_INDIRECT)
166: case CF(DOCOL) :
167: case CF(DOVAR) :
168: case CF(DOCON) :
169: case CF(DOUSER) :
170: case CF(DODEFER) :
1.11 pazsan 171: case CF(DOFIELD) : MAKE_CF(image+i,symbols[CF(token)]); break;
1.1 anton 172: case CF(DOESJUMP): MAKE_DOES_HANDLER(image+i); break;
173: #endif /* !defined(DOUBLY_INDIRECT) */
174: case CF(DODOES) :
1.45 jwilke 175: MAKE_DOES_CF(image+i,(Xt *)(image[i+1]+((Cell)start)));
1.1 anton 176: break;
177: default :
178: /* printf("Code field generation image[%x]:=CA(%x)\n",
179: i, CF(image[i])); */
1.51 ! anton 180: token |= 0x4000; /* only meaningful for hybrid engines */
1.37 anton 181: if (CF(token)<max_symbols)
182: image[i]=(Cell)CA(CF(token));
183: else
184: fprintf(stderr,"Primitive %d used in this image at $%lx is not implemented by this\n engine (%s); executing this code will crash.\n",CF(token),(long)&image[i],VERSION);
1.1 anton 185: }
1.46 jwilke 186: else {
1.45 jwilke 187: // if base is > 0: 0 is a null reference so don't adjust
188: if (token>=base) {
189: image[i]+=(Cell)start;
190: }
1.46 jwilke 191: }
1.1 anton 192: }
193: }
1.31 pazsan 194: }
1.26 jwilke 195: ((ImageHeader*)(image))->base = (Address) image;
1.1 anton 196: }
197:
198: UCell checksum(Label symbols[])
199: {
200: UCell r=PRIM_VERSION;
201: Cell i;
202:
203: for (i=DOCOL; i<=DOESJUMP; i++) {
204: r ^= (UCell)(symbols[i]);
205: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
206: }
207: #ifdef DIRECT_THREADED
208: /* we have to consider all the primitives */
209: for (; symbols[i]!=(Label)0; i++) {
210: r ^= (UCell)(symbols[i]);
211: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
212: }
213: #else
214: /* in indirect threaded code all primitives are accessed through the
215: symbols table, so we just have to put the base address of symbols
216: in the checksum */
217: r ^= (UCell)symbols;
218: #endif
219: return r;
220: }
221:
1.3 anton 222: Address verbose_malloc(Cell size)
223: {
224: Address r;
225: /* leave a little room (64B) for stack underflows */
226: if ((r = malloc(size+64))==NULL) {
227: perror(progname);
228: exit(1);
229: }
230: r = (Address)((((Cell)r)+(sizeof(Float)-1))&(-sizeof(Float)));
231: if (debug)
232: fprintf(stderr, "malloc succeeds, address=$%lx\n", (long)r);
233: return r;
234: }
235:
1.33 anton 236: static Address next_address=0;
237: void after_alloc(Address r, Cell size)
238: {
239: if (r != (Address)-1) {
240: if (debug)
241: fprintf(stderr, "success, address=$%lx\n", (long) r);
242: if (pagesize != 1)
243: next_address = (Address)(((((Cell)r)+size-1)&-pagesize)+2*pagesize); /* leave one page unmapped */
244: } else {
245: if (debug)
246: fprintf(stderr, "failed: %s\n", strerror(errno));
247: }
248: }
249:
1.34 anton 250: #ifndef MAP_FAILED
251: #define MAP_FAILED ((Address) -1)
252: #endif
253: #ifndef MAP_FILE
254: # define MAP_FILE 0
255: #endif
256: #ifndef MAP_PRIVATE
257: # define MAP_PRIVATE 0
258: #endif
259:
260: #if defined(HAVE_MMAP)
261: static Address alloc_mmap(Cell size)
1.1 anton 262: {
263: Address r;
264:
265: #if defined(MAP_ANON)
266: if (debug)
267: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_ANON, ...); ", (long)next_address, (long)size);
1.34 anton 268: r = mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
1.1 anton 269: #else /* !defined(MAP_ANON) */
1.17 anton 270: /* Ultrix (at least) does not define MAP_FILE and MAP_PRIVATE (both are
271: apparently defaults) */
1.1 anton 272: static int dev_zero=-1;
273:
274: if (dev_zero == -1)
275: dev_zero = open("/dev/zero", O_RDONLY);
276: if (dev_zero == -1) {
1.34 anton 277: r = MAP_FAILED;
1.1 anton 278: if (debug)
279: fprintf(stderr, "open(\"/dev/zero\"...) failed (%s), no mmap; ",
280: strerror(errno));
281: } else {
282: if (debug)
283: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FILE, dev_zero, ...); ", (long)next_address, (long)size);
284: r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FILE|MAP_PRIVATE, dev_zero, 0);
285: }
286: #endif /* !defined(MAP_ANON) */
1.34 anton 287: after_alloc(r, size);
288: return r;
289: }
290: #endif
291:
292: Address my_alloc(Cell size)
293: {
294: #if HAVE_MMAP
295: Address r;
296:
297: r=alloc_mmap(size);
298: if (r!=MAP_FAILED)
1.1 anton 299: return r;
300: #endif /* HAVE_MMAP */
1.3 anton 301: /* use malloc as fallback */
302: return verbose_malloc(size);
1.1 anton 303: }
304:
1.3 anton 305: #if (defined(mips) && !defined(INDIRECT_THREADED))
306: /* the 256MB jump restriction on the MIPS architecture makes the
307: combination of direct threading and mmap unsafe. */
1.33 anton 308: #define mips_dict_alloc 1
1.3 anton 309: #define dict_alloc(size) verbose_malloc(size)
310: #else
311: #define dict_alloc(size) my_alloc(size)
312: #endif
313:
1.34 anton 314: Address dict_alloc_read(FILE *file, Cell imagesize, Cell dictsize, Cell offset)
1.33 anton 315: {
1.34 anton 316: Address image = MAP_FAILED;
1.33 anton 317:
1.34 anton 318: #if defined(HAVE_MMAP) && !defined(mips_dict_alloc)
1.33 anton 319: if (offset==0) {
1.34 anton 320: image=alloc_mmap(dictsize);
1.33 anton 321: if (debug)
1.34 anton 322: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FIXED|MAP_FILE, imagefile, 0); ", (long)image, (long)imagesize);
323: image = mmap(image, imagesize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FIXED|MAP_FILE|MAP_PRIVATE, fileno(file), 0);
324: after_alloc(image,dictsize);
1.33 anton 325: }
1.34 anton 326: #endif /* defined(MAP_ANON) && !defined(mips_dict_alloc) */
327: if (image == MAP_FAILED) {
328: image = dict_alloc(dictsize+offset)+offset;
1.33 anton 329: rewind(file); /* fseek(imagefile,0L,SEEK_SET); */
1.34 anton 330: fread(image, 1, imagesize, file);
1.33 anton 331: }
332: return image;
333: }
334:
1.10 pazsan 335: void set_stack_sizes(ImageHeader * header)
336: {
337: if (dictsize==0)
338: dictsize = header->dict_size;
339: if (dsize==0)
340: dsize = header->data_stack_size;
341: if (rsize==0)
342: rsize = header->return_stack_size;
343: if (fsize==0)
344: fsize = header->fp_stack_size;
345: if (lsize==0)
346: lsize = header->locals_stack_size;
347: dictsize=maxaligned(dictsize);
348: dsize=maxaligned(dsize);
349: rsize=maxaligned(rsize);
350: lsize=maxaligned(lsize);
351: fsize=maxaligned(fsize);
352: }
353:
354: void alloc_stacks(ImageHeader * header)
355: {
356: header->dict_size=dictsize;
357: header->data_stack_size=dsize;
358: header->fp_stack_size=fsize;
359: header->return_stack_size=rsize;
360: header->locals_stack_size=lsize;
361:
362: header->data_stack_base=my_alloc(dsize);
363: header->fp_stack_base=my_alloc(fsize);
364: header->return_stack_base=my_alloc(rsize);
365: header->locals_stack_base=my_alloc(lsize);
1.48 anton 366: code_here = code_area = my_alloc(dictsize);
1.10 pazsan 367: }
368:
1.44 pazsan 369: #warning You can ignore the warnings about clobbered variables in go_forth
1.11 pazsan 370: int go_forth(Address image, int stack, Cell *entries)
371: {
1.38 anton 372: volatile ImageHeader *image_header = (ImageHeader *)image;
1.18 anton 373: Cell *sp0=(Cell*)(image_header->data_stack_base + dsize);
1.44 pazsan 374: Cell *rp0=(Cell *)(image_header->return_stack_base + rsize);
1.18 anton 375: Float *fp0=(Float *)(image_header->fp_stack_base + fsize);
1.44 pazsan 376: #ifdef GFORTH_DEBUGGING
1.38 anton 377: volatile Cell *orig_rp0=rp0;
1.44 pazsan 378: #endif
1.18 anton 379: Address lp0=image_header->locals_stack_base + lsize;
380: Xt *ip0=(Xt *)(image_header->boot_entry);
1.13 pazsan 381: #ifdef SYSSIGNALS
1.11 pazsan 382: int throw_code;
1.13 pazsan 383: #endif
1.11 pazsan 384:
385: /* ensure that the cached elements (if any) are accessible */
1.41 anton 386: IF_spTOS(sp0--);
387: IF_fpTOS(fp0--);
1.11 pazsan 388:
389: for(;stack>0;stack--)
1.18 anton 390: *--sp0=entries[stack-1];
1.11 pazsan 391:
1.30 pazsan 392: #ifdef SYSSIGNALS
1.11 pazsan 393: get_winsize();
394:
395: install_signal_handlers(); /* right place? */
396:
397: if ((throw_code=setjmp(throw_jmp_buf))) {
398: static Cell signal_data_stack[8];
399: static Cell signal_return_stack[8];
400: static Float signal_fp_stack[1];
1.13 pazsan 401:
1.11 pazsan 402: signal_data_stack[7]=throw_code;
1.18 anton 403:
404: #ifdef GFORTH_DEBUGGING
1.38 anton 405: /* fprintf(stderr,"\nrp=%ld\n",(long)rp); */
406: if (rp <= orig_rp0 && rp > (Cell *)(image_header->return_stack_base+5)) {
1.18 anton 407: /* no rstack overflow or underflow */
408: rp0 = rp;
1.27 anton 409: *--rp0 = (Cell)ip;
1.18 anton 410: }
411: else /* I love non-syntactic ifdefs :-) */
412: #endif
413: rp0 = signal_return_stack+8;
1.25 anton 414: /* fprintf(stderr, "rp=$%x\n",rp0);*/
1.11 pazsan 415:
1.33 anton 416: return((int)(Cell)engine(image_header->throw_entry, signal_data_stack+7,
1.18 anton 417: rp0, signal_fp_stack, 0));
1.11 pazsan 418: }
1.13 pazsan 419: #endif
1.11 pazsan 420:
1.33 anton 421: return((int)(Cell)engine(ip0,sp0,rp0,fp0,lp0));
1.11 pazsan 422: }
423:
1.21 anton 424:
1.30 pazsan 425: #ifndef INCLUDE_IMAGE
1.21 anton 426: void print_sizes(Cell sizebyte)
427: /* print size information */
428: {
429: static char* endianstring[]= { " big","little" };
430:
431: fprintf(stderr,"%s endian, cell=%d bytes, char=%d bytes, au=%d bytes\n",
432: endianstring[sizebyte & 1],
433: 1 << ((sizebyte >> 1) & 3),
434: 1 << ((sizebyte >> 3) & 3),
435: 1 << ((sizebyte >> 5) & 3));
436: }
437:
1.47 anton 438: typedef struct {
439: Label start;
440: Cell length; /* excluding the jump */
441: char super_end; /* true if primitive ends superinstruction, i.e.,
442: unconditional branch, execute, etc. */
443: } PrimInfo;
444:
445: PrimInfo *priminfos;
1.48 anton 446: Cell npriminfos=0;
1.47 anton 447:
448: void check_prims(Label symbols1[])
449: {
1.50 anton 450: #if defined(IS_NEXT_JUMP) && !defined(DOUBLY_INDIRECT)
1.47 anton 451: int i;
452: Label *symbols2=engine2(0,0,0,0,0);
1.49 anton 453: static char superend[]={
1.48 anton 454: #include "prim_superend.i"
455: };
1.47 anton 456:
457: for (i=DOESJUMP+1; symbols1[i+1]!=0; i++)
458: ;
459: priminfos = calloc(i,sizeof(PrimInfo));
1.48 anton 460: npriminfos = i;
1.47 anton 461: for (i=DOESJUMP+1; symbols1[i+1]!=0; i++) {
462: int prim_len=symbols1[i+1]-symbols1[i];
463: PrimInfo *pi=&priminfos[i];
464: int j;
1.48 anton 465: pi->super_end = superend[i-DOESJUMP-1];
1.50 anton 466: for (j=prim_len-IND_JUMP_LENGTH; ; j--) {
467: if (IS_NEXT_JUMP(symbols1[i]+j)) {
1.47 anton 468: prim_len = j;
1.48 anton 469: if (pi->super_end)
1.50 anton 470: prim_len += IND_JUMP_LENGTH; /* include the jump */
1.47 anton 471: break;
472: }
473: if (j==0) { /* NEXT jump not found, e.g., execute */
1.48 anton 474: if (!pi->super_end && debug)
475: fprintf(stderr, "NEXT jump not found for primitive %d, making it super_end\n", i);
476: pi->super_end = 1;
1.47 anton 477: break;
478: }
479: }
480: /* fprintf(stderr,"checking primitive %d: memcmp(%p, %p, %d)\n",
481: i, symbols1[i], symbols2[i], prim_len);*/
482: if (memcmp(symbols1[i],symbols2[i],prim_len)!=0) {
483: if (debug)
484: fprintf(stderr,"Primitive %d not relocatable: memcmp(%p, %p, %d)\n",
485: i, symbols1[i], symbols2[i], prim_len);
486: } else {
487: pi->start = symbols1[i];
488: pi->length = prim_len;
489: if (debug)
490: fprintf(stderr,"Primitive %d relocatable: start %p, length %ld, super_end %d\n",
491: i, pi->start, pi->length, pi->super_end);
492: }
1.48 anton 493: }
494: #endif
495: }
496:
497: Label compile_prim(Label prim)
498: {
1.50 anton 499: #ifdef IND_JUMP_LENGTH
1.48 anton 500: int i;
501: Address old_code_here=code_here;
502: static Address last_jump=0;
503:
504: for (i=0; ; i++) {
505: if (i>=npriminfos) { /* not a relocatable prim */
506: if (last_jump) { /* make sure the last sequence is complete */
1.50 anton 507: memcpy(code_here, last_jump, IND_JUMP_LENGTH);
508: code_here += IND_JUMP_LENGTH;
1.48 anton 509: last_jump = 0;
510: }
511: return prim;
512: }
513: if (priminfos[i].start==prim)
514: break;
1.47 anton 515: }
1.50 anton 516: #ifdef ALIGN_CODE
517: ALIGN_CODE;
518: #endif
1.48 anton 519: memcpy(code_here, (Address)prim, priminfos[i].length);
520: code_here += priminfos[i].length;
521: last_jump = (priminfos[i].super_end) ? 0 : (prim+priminfos[i].length);
522: return (Label)old_code_here;
1.50 anton 523: #else
524: return prim;
525: #endif
1.47 anton 526: }
527:
1.1 anton 528: Address loader(FILE *imagefile, char* filename)
529: /* returns the address of the image proper (after the preamble) */
530: {
531: ImageHeader header;
532: Address image;
533: Address imp; /* image+preamble */
1.17 anton 534: Char magic[8];
535: char magic7; /* size byte of magic number */
1.1 anton 536: Cell preamblesize=0;
1.6 pazsan 537: Cell data_offset = offset_image ? 56*sizeof(Cell) : 0;
1.1 anton 538: UCell check_sum;
1.15 pazsan 539: Cell ausize = ((RELINFOBITS == 8) ? 0 :
540: (RELINFOBITS == 16) ? 1 :
541: (RELINFOBITS == 32) ? 2 : 3);
542: Cell charsize = ((sizeof(Char) == 1) ? 0 :
543: (sizeof(Char) == 2) ? 1 :
544: (sizeof(Char) == 4) ? 2 : 3) + ausize;
545: Cell cellsize = ((sizeof(Cell) == 1) ? 0 :
546: (sizeof(Cell) == 2) ? 1 :
547: (sizeof(Cell) == 4) ? 2 : 3) + ausize;
1.21 anton 548: Cell sizebyte = (ausize << 5) + (charsize << 3) + (cellsize << 1) +
549: #ifdef WORDS_BIGENDIAN
550: 0
551: #else
552: 1
553: #endif
554: ;
1.1 anton 555:
1.43 anton 556: vm_prims = engine(0,0,0,0,0);
1.47 anton 557: check_prims(vm_prims);
1.1 anton 558: #ifndef DOUBLY_INDIRECT
1.43 anton 559: check_sum = checksum(vm_prims);
1.1 anton 560: #else /* defined(DOUBLY_INDIRECT) */
1.43 anton 561: check_sum = (UCell)vm_prims;
1.1 anton 562: #endif /* defined(DOUBLY_INDIRECT) */
1.10 pazsan 563:
564: do {
565: if(fread(magic,sizeof(Char),8,imagefile) < 8) {
1.15 pazsan 566: fprintf(stderr,"%s: image %s doesn't seem to be a Gforth (>=0.4) image.\n",
1.10 pazsan 567: progname, filename);
568: exit(1);
1.1 anton 569: }
1.10 pazsan 570: preamblesize+=8;
1.15 pazsan 571: } while(memcmp(magic,"Gforth2",7));
1.17 anton 572: magic7 = magic[7];
1.1 anton 573: if (debug) {
1.17 anton 574: magic[7]='\0';
1.21 anton 575: fprintf(stderr,"Magic found: %s ", magic);
576: print_sizes(magic7);
1.1 anton 577: }
578:
1.21 anton 579: if (magic7 != sizebyte)
580: {
581: fprintf(stderr,"This image is: ");
582: print_sizes(magic7);
583: fprintf(stderr,"whereas the machine is ");
584: print_sizes(sizebyte);
1.1 anton 585: exit(-2);
586: };
587:
588: fread((void *)&header,sizeof(ImageHeader),1,imagefile);
1.10 pazsan 589:
590: set_stack_sizes(&header);
1.1 anton 591:
592: #if HAVE_GETPAGESIZE
593: pagesize=getpagesize(); /* Linux/GNU libc offers this */
594: #elif HAVE_SYSCONF && defined(_SC_PAGESIZE)
595: pagesize=sysconf(_SC_PAGESIZE); /* POSIX.4 */
596: #elif PAGESIZE
597: pagesize=PAGESIZE; /* in limits.h according to Gallmeister's POSIX.4 book */
598: #endif
599: if (debug)
1.5 jwilke 600: fprintf(stderr,"pagesize=%ld\n",(unsigned long) pagesize);
1.1 anton 601:
1.34 anton 602: image = dict_alloc_read(imagefile, preamblesize+header.image_size,
603: preamblesize+dictsize, data_offset);
1.33 anton 604: imp=image+preamblesize;
1.1 anton 605: if (clear_dictionary)
1.33 anton 606: memset(imp+header.image_size, 0, dictsize-header.image_size);
1.46 jwilke 607: if(header.base==0 || header.base == 0x100) {
1.1 anton 608: Cell reloc_size=((header.image_size-1)/sizeof(Cell))/8+1;
609: char reloc_bits[reloc_size];
1.33 anton 610: fseek(imagefile, preamblesize+header.image_size, SEEK_SET);
1.10 pazsan 611: fread(reloc_bits, 1, reloc_size, imagefile);
1.45 jwilke 612: relocate((Cell *)imp, reloc_bits, header.image_size, header.base, vm_prims);
1.1 anton 613: #if 0
614: { /* let's see what the relocator did */
615: FILE *snapshot=fopen("snapshot.fi","wb");
616: fwrite(image,1,imagesize,snapshot);
617: fclose(snapshot);
618: }
619: #endif
1.46 jwilke 620: }
621: else if(header.base!=imp) {
622: fprintf(stderr,"%s: Cannot load nonrelocatable image (compiled for address $%lx) at address $%lx\n",
623: progname, (unsigned long)header.base, (unsigned long)imp);
624: exit(1);
1.1 anton 625: }
626: if (header.checksum==0)
627: ((ImageHeader *)imp)->checksum=check_sum;
628: else if (header.checksum != check_sum) {
629: fprintf(stderr,"%s: Checksum of image ($%lx) does not match the executable ($%lx)\n",
630: progname, (unsigned long)(header.checksum),(unsigned long)check_sum);
631: exit(1);
632: }
633: fclose(imagefile);
634:
1.10 pazsan 635: alloc_stacks((ImageHeader *)imp);
1.1 anton 636:
637: CACHE_FLUSH(imp, header.image_size);
638:
639: return imp;
640: }
641:
1.28 anton 642: /* index of last '/' or '\' in file, 0 if there is none. !! Hmm, could
643: be implemented with strrchr and the separator should be
644: OS-dependent */
1.1 anton 645: int onlypath(char *file)
1.10 pazsan 646: {
647: int i;
1.1 anton 648: i=strlen(file);
1.10 pazsan 649: while (i) {
650: if (file[i]=='\\' || file[i]=='/') break;
651: i--;
652: }
653: return i;
1.1 anton 654: }
655:
656: FILE *openimage(char *fullfilename)
1.10 pazsan 657: {
658: FILE *image_file;
1.28 anton 659: char * expfilename = tilde_cstr(fullfilename, strlen(fullfilename), 1);
1.10 pazsan 660:
1.28 anton 661: image_file=fopen(expfilename,"rb");
1.1 anton 662: if (image_file!=NULL && debug)
1.28 anton 663: fprintf(stderr, "Opened image file: %s\n", expfilename);
1.10 pazsan 664: return image_file;
1.1 anton 665: }
666:
1.28 anton 667: /* try to open image file concat(path[0:len],imagename) */
1.1 anton 668: FILE *checkimage(char *path, int len, char *imagename)
1.10 pazsan 669: {
670: int dirlen=len;
1.1 anton 671: char fullfilename[dirlen+strlen(imagename)+2];
1.10 pazsan 672:
1.1 anton 673: memcpy(fullfilename, path, dirlen);
674: if (fullfilename[dirlen-1]!='/')
675: fullfilename[dirlen++]='/';
676: strcpy(fullfilename+dirlen,imagename);
1.10 pazsan 677: return openimage(fullfilename);
1.1 anton 678: }
679:
1.10 pazsan 680: FILE * open_image_file(char * imagename, char * path)
1.1 anton 681: {
1.10 pazsan 682: FILE * image_file=NULL;
1.28 anton 683: char *origpath=path;
1.10 pazsan 684:
685: if(strchr(imagename, '/')==NULL) {
686: /* first check the directory where the exe file is in !! 01may97jaw */
687: if (onlypath(progname))
688: image_file=checkimage(progname, onlypath(progname), imagename);
689: if (!image_file)
690: do {
691: char *pend=strchr(path, PATHSEP);
692: if (pend==NULL)
693: pend=path+strlen(path);
694: if (strlen(path)==0) break;
695: image_file=checkimage(path, pend-path, imagename);
696: path=pend+(*pend==PATHSEP);
697: } while (image_file==NULL);
698: } else {
699: image_file=openimage(imagename);
700: }
1.1 anton 701:
1.10 pazsan 702: if (!image_file) {
703: fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n",
1.28 anton 704: progname, imagename, origpath);
1.10 pazsan 705: exit(1);
1.7 anton 706: }
707:
1.10 pazsan 708: return image_file;
709: }
1.11 pazsan 710: #endif
711:
712: #ifdef HAS_OS
713: UCell convsize(char *s, UCell elemsize)
714: /* converts s of the format [0-9]+[bekMGT]? (e.g. 25k) into the number
715: of bytes. the letter at the end indicates the unit, where e stands
716: for the element size. default is e */
717: {
718: char *endp;
719: UCell n,m;
720:
721: m = elemsize;
722: n = strtoul(s,&endp,0);
723: if (endp!=NULL) {
724: if (strcmp(endp,"b")==0)
725: m=1;
726: else if (strcmp(endp,"k")==0)
727: m=1024;
728: else if (strcmp(endp,"M")==0)
729: m=1024*1024;
730: else if (strcmp(endp,"G")==0)
731: m=1024*1024*1024;
732: else if (strcmp(endp,"T")==0) {
733: #if (SIZEOF_CHAR_P > 4)
1.24 anton 734: m=1024L*1024*1024*1024;
1.11 pazsan 735: #else
736: fprintf(stderr,"%s: size specification \"%s\" too large for this machine\n", progname, endp);
737: exit(1);
738: #endif
739: } else if (strcmp(endp,"e")!=0 && strcmp(endp,"")!=0) {
740: fprintf(stderr,"%s: cannot grok size specification %s: invalid unit \"%s\"\n", progname, s, endp);
741: exit(1);
742: }
743: }
744: return n*m;
745: }
1.10 pazsan 746:
747: void gforth_args(int argc, char ** argv, char ** path, char ** imagename)
748: {
749: int c;
750:
1.1 anton 751: opterr=0;
752: while (1) {
753: int option_index=0;
754: static struct option opts[] = {
1.29 anton 755: {"appl-image", required_argument, NULL, 'a'},
1.1 anton 756: {"image-file", required_argument, NULL, 'i'},
757: {"dictionary-size", required_argument, NULL, 'm'},
758: {"data-stack-size", required_argument, NULL, 'd'},
759: {"return-stack-size", required_argument, NULL, 'r'},
760: {"fp-stack-size", required_argument, NULL, 'f'},
761: {"locals-stack-size", required_argument, NULL, 'l'},
762: {"path", required_argument, NULL, 'p'},
763: {"version", no_argument, NULL, 'v'},
764: {"help", no_argument, NULL, 'h'},
765: /* put something != 0 into offset_image */
766: {"offset-image", no_argument, &offset_image, 1},
767: {"no-offset-im", no_argument, &offset_image, 0},
768: {"clear-dictionary", no_argument, &clear_dictionary, 1},
1.4 anton 769: {"die-on-signal", no_argument, &die_on_signal, 1},
1.1 anton 770: {"debug", no_argument, &debug, 1},
771: {0,0,0,0}
772: /* no-init-file, no-rc? */
773: };
774:
1.36 pazsan 775: c = getopt_long(argc, argv, "+i:m:d:r:f:l:p:vhoncsx", opts, &option_index);
1.1 anton 776:
777: switch (c) {
1.29 anton 778: case EOF: return;
779: case '?': optind--; return;
780: case 'a': *imagename = optarg; return;
1.10 pazsan 781: case 'i': *imagename = optarg; break;
1.1 anton 782: case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
783: case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
784: case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
785: case 'f': fsize = convsize(optarg,sizeof(Float)); break;
786: case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
1.10 pazsan 787: case 'p': *path = optarg; break;
1.36 pazsan 788: case 'o': offset_image = 1; break;
789: case 'n': offset_image = 0; break;
790: case 'c': clear_dictionary = 1; break;
791: case 's': die_on_signal = 1; break;
792: case 'x': debug = 1; break;
1.8 anton 793: case 'v': fprintf(stderr, "gforth %s\n", VERSION); exit(0);
1.1 anton 794: case 'h':
1.29 anton 795: fprintf(stderr, "Usage: %s [engine options] ['--'] [image arguments]\n\
1.1 anton 796: Engine Options:\n\
1.29 anton 797: --appl-image FILE equivalent to '--image-file=FILE --'\n\
1.10 pazsan 798: --clear-dictionary Initialize the dictionary with 0 bytes\n\
799: -d SIZE, --data-stack-size=SIZE Specify data stack size\n\
800: --debug Print debugging information during startup\n\
801: --die-on-signal exit instead of CATCHing some signals\n\
802: -f SIZE, --fp-stack-size=SIZE Specify floating point stack size\n\
803: -h, --help Print this message and exit\n\
804: -i FILE, --image-file=FILE Use image FILE instead of `gforth.fi'\n\
805: -l SIZE, --locals-stack-size=SIZE Specify locals stack size\n\
806: -m SIZE, --dictionary-size=SIZE Specify Forth dictionary size\n\
807: --no-offset-im Load image at normal position\n\
808: --offset-image Load image at a different position\n\
809: -p PATH, --path=PATH Search path for finding image and sources\n\
810: -r SIZE, --return-stack-size=SIZE Specify return stack size\n\
811: -v, --version Print version and exit\n\
1.1 anton 812: SIZE arguments consist of an integer followed by a unit. The unit can be\n\
1.10 pazsan 813: `b' (byte), `e' (element; default), `k' (KB), `M' (MB), `G' (GB) or `T' (TB).\n",
814: argv[0]);
815: optind--;
816: return;
1.1 anton 817: }
818: }
1.10 pazsan 819: }
1.11 pazsan 820: #endif
1.10 pazsan 821:
822: #ifdef INCLUDE_IMAGE
823: extern Cell image[];
824: extern const char reloc_bits[];
825: #endif
826:
827: int main(int argc, char **argv, char **env)
828: {
1.30 pazsan 829: #ifdef HAS_OS
1.10 pazsan 830: char *path = getenv("GFORTHPATH") ? : DEFAULTPATH;
1.30 pazsan 831: #else
832: char *path = DEFAULTPATH;
833: #endif
1.13 pazsan 834: #ifndef INCLUDE_IMAGE
1.10 pazsan 835: char *imagename="gforth.fi";
836: FILE *image_file;
837: Address image;
838: #endif
839: int retvalue;
840:
841: #if defined(i386) && defined(ALIGNMENT_CHECK) && !defined(DIRECT_THREADED)
842: /* turn on alignment checks on the 486.
843: * on the 386 this should have no effect. */
844: __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
845: /* this is unusable with Linux' libc.4.6.27, because this library is
846: not alignment-clean; we would have to replace some library
847: functions (e.g., memcpy) to make it work. Also GCC doesn't try to keep
848: the stack FP-aligned. */
849: #endif
850:
851: /* buffering of the user output device */
1.11 pazsan 852: #ifdef _IONBF
1.10 pazsan 853: if (isatty(fileno(stdout))) {
854: fflush(stdout);
855: setvbuf(stdout,NULL,_IONBF,0);
1.1 anton 856: }
1.11 pazsan 857: #endif
1.1 anton 858:
1.10 pazsan 859: progname = argv[0];
860:
1.11 pazsan 861: #ifdef HAS_OS
1.10 pazsan 862: gforth_args(argc, argv, &path, &imagename);
1.11 pazsan 863: #endif
1.10 pazsan 864:
865: #ifdef INCLUDE_IMAGE
866: set_stack_sizes((ImageHeader *)image);
1.22 pazsan 867: if(((ImageHeader *)image)->base != image)
868: relocate(image, reloc_bits, ((ImageHeader *)image)->image_size,
869: (Label*)engine(0, 0, 0, 0, 0));
1.10 pazsan 870: alloc_stacks((ImageHeader *)image);
871: #else
872: image_file = open_image_file(imagename, path);
873: image = loader(image_file, imagename);
874: #endif
1.24 anton 875: gforth_header=(ImageHeader *)image; /* used in SIGSEGV handler */
1.1 anton 876:
877: {
1.10 pazsan 878: char path2[strlen(path)+1];
1.1 anton 879: char *p1, *p2;
880: Cell environ[]= {
881: (Cell)argc-(optind-1),
882: (Cell)(argv+(optind-1)),
1.10 pazsan 883: (Cell)strlen(path),
1.1 anton 884: (Cell)path2};
885: argv[optind-1] = progname;
886: /*
887: for (i=0; i<environ[0]; i++)
888: printf("%s\n", ((char **)(environ[1]))[i]);
889: */
890: /* make path OS-independent by replacing path separators with NUL */
1.10 pazsan 891: for (p1=path, p2=path2; *p1!='\0'; p1++, p2++)
1.1 anton 892: if (*p1==PATHSEP)
893: *p2 = '\0';
894: else
895: *p2 = *p1;
896: *p2='\0';
1.10 pazsan 897: retvalue = go_forth(image, 4, environ);
1.42 anton 898: #ifdef VM_PROFILING
899: vm_print_profile(stderr);
900: #endif
1.1 anton 901: deprep_terminal();
902: }
1.13 pazsan 903: return retvalue;
1.1 anton 904: }
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to main.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [gforth] / gforth / engine