Annotation of gforth/engine/main.c, revision 1.48
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)
129: * If the word is <CF(DOESJUMP), it's a primitive
130: */
131:
1.46 jwilke 132: void relocate(Cell *image, const char *bitstring,
133: int size, int base, Label symbols[])
1.1 anton 134: {
1.16 pazsan 135: int i=0, j, k, steps=(size/sizeof(Cell))/RELINFOBITS;
1.11 pazsan 136: Cell token;
1.1 anton 137: char bits;
1.37 anton 138: Cell max_symbols;
1.46 jwilke 139: /*
140: * A virtial start address that's the real start address minus
141: * the one in the image
142: */
1.45 jwilke 143: Cell *start = (Cell * ) (((void *) image) - ((void *) base));
1.1 anton 144:
1.46 jwilke 145:
146: /* printf("relocating to %x[%x] start=%x base=%x\n", image, size, start, base); */
1.37 anton 147:
148: for (max_symbols=DOESJUMP+1; symbols[max_symbols]!=0; max_symbols++)
149: ;
1.47 anton 150: max_symbols--;
1.35 pazsan 151: size/=sizeof(Cell);
152:
1.31 pazsan 153: for(k=0; k<=steps; k++) {
1.13 pazsan 154: for(j=0, bits=bitstring[k]; j<RELINFOBITS; j++, i++, bits<<=1) {
1.1 anton 155: /* fprintf(stderr,"relocate: image[%d]\n", i);*/
1.35 pazsan 156: if((i < size) && (bits & (1U << (RELINFOBITS-1)))) {
157: /* fprintf(stderr,"relocate: image[%d]=%d of %d\n", i, image[i], size/sizeof(Cell)); */
1.45 jwilke 158: token=image[i];
159: if(token<0)
1.11 pazsan 160: switch(token)
1.1 anton 161: {
162: case CF_NIL : image[i]=0; break;
163: #if !defined(DOUBLY_INDIRECT)
164: case CF(DOCOL) :
165: case CF(DOVAR) :
166: case CF(DOCON) :
167: case CF(DOUSER) :
168: case CF(DODEFER) :
1.11 pazsan 169: case CF(DOFIELD) : MAKE_CF(image+i,symbols[CF(token)]); break;
1.1 anton 170: case CF(DOESJUMP): MAKE_DOES_HANDLER(image+i); break;
171: #endif /* !defined(DOUBLY_INDIRECT) */
172: case CF(DODOES) :
1.45 jwilke 173: MAKE_DOES_CF(image+i,(Xt *)(image[i+1]+((Cell)start)));
1.1 anton 174: break;
175: default :
176: /* printf("Code field generation image[%x]:=CA(%x)\n",
177: i, CF(image[i])); */
1.37 anton 178: if (CF(token)<max_symbols)
179: image[i]=(Cell)CA(CF(token));
180: else
181: fprintf(stderr,"Primitive %d used in this image at $%lx is not implemented by this\n engine (%s); executing this code will crash.\n",CF(token),(long)&image[i],VERSION);
1.1 anton 182: }
1.46 jwilke 183: else {
1.45 jwilke 184: // if base is > 0: 0 is a null reference so don't adjust
185: if (token>=base) {
186: image[i]+=(Cell)start;
187: }
1.46 jwilke 188: }
1.1 anton 189: }
190: }
1.31 pazsan 191: }
1.26 jwilke 192: ((ImageHeader*)(image))->base = (Address) image;
1.1 anton 193: }
194:
195: UCell checksum(Label symbols[])
196: {
197: UCell r=PRIM_VERSION;
198: Cell i;
199:
200: for (i=DOCOL; i<=DOESJUMP; i++) {
201: r ^= (UCell)(symbols[i]);
202: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
203: }
204: #ifdef DIRECT_THREADED
205: /* we have to consider all the primitives */
206: for (; symbols[i]!=(Label)0; i++) {
207: r ^= (UCell)(symbols[i]);
208: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
209: }
210: #else
211: /* in indirect threaded code all primitives are accessed through the
212: symbols table, so we just have to put the base address of symbols
213: in the checksum */
214: r ^= (UCell)symbols;
215: #endif
216: return r;
217: }
218:
1.3 anton 219: Address verbose_malloc(Cell size)
220: {
221: Address r;
222: /* leave a little room (64B) for stack underflows */
223: if ((r = malloc(size+64))==NULL) {
224: perror(progname);
225: exit(1);
226: }
227: r = (Address)((((Cell)r)+(sizeof(Float)-1))&(-sizeof(Float)));
228: if (debug)
229: fprintf(stderr, "malloc succeeds, address=$%lx\n", (long)r);
230: return r;
231: }
232:
1.33 anton 233: static Address next_address=0;
234: void after_alloc(Address r, Cell size)
235: {
236: if (r != (Address)-1) {
237: if (debug)
238: fprintf(stderr, "success, address=$%lx\n", (long) r);
239: if (pagesize != 1)
240: next_address = (Address)(((((Cell)r)+size-1)&-pagesize)+2*pagesize); /* leave one page unmapped */
241: } else {
242: if (debug)
243: fprintf(stderr, "failed: %s\n", strerror(errno));
244: }
245: }
246:
1.34 anton 247: #ifndef MAP_FAILED
248: #define MAP_FAILED ((Address) -1)
249: #endif
250: #ifndef MAP_FILE
251: # define MAP_FILE 0
252: #endif
253: #ifndef MAP_PRIVATE
254: # define MAP_PRIVATE 0
255: #endif
256:
257: #if defined(HAVE_MMAP)
258: static Address alloc_mmap(Cell size)
1.1 anton 259: {
260: Address r;
261:
262: #if defined(MAP_ANON)
263: if (debug)
264: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_ANON, ...); ", (long)next_address, (long)size);
1.34 anton 265: r = mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
1.1 anton 266: #else /* !defined(MAP_ANON) */
1.17 anton 267: /* Ultrix (at least) does not define MAP_FILE and MAP_PRIVATE (both are
268: apparently defaults) */
1.1 anton 269: static int dev_zero=-1;
270:
271: if (dev_zero == -1)
272: dev_zero = open("/dev/zero", O_RDONLY);
273: if (dev_zero == -1) {
1.34 anton 274: r = MAP_FAILED;
1.1 anton 275: if (debug)
276: fprintf(stderr, "open(\"/dev/zero\"...) failed (%s), no mmap; ",
277: strerror(errno));
278: } else {
279: if (debug)
280: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FILE, dev_zero, ...); ", (long)next_address, (long)size);
281: r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FILE|MAP_PRIVATE, dev_zero, 0);
282: }
283: #endif /* !defined(MAP_ANON) */
1.34 anton 284: after_alloc(r, size);
285: return r;
286: }
287: #endif
288:
289: Address my_alloc(Cell size)
290: {
291: #if HAVE_MMAP
292: Address r;
293:
294: r=alloc_mmap(size);
295: if (r!=MAP_FAILED)
1.1 anton 296: return r;
297: #endif /* HAVE_MMAP */
1.3 anton 298: /* use malloc as fallback */
299: return verbose_malloc(size);
1.1 anton 300: }
301:
1.3 anton 302: #if (defined(mips) && !defined(INDIRECT_THREADED))
303: /* the 256MB jump restriction on the MIPS architecture makes the
304: combination of direct threading and mmap unsafe. */
1.33 anton 305: #define mips_dict_alloc 1
1.3 anton 306: #define dict_alloc(size) verbose_malloc(size)
307: #else
308: #define dict_alloc(size) my_alloc(size)
309: #endif
310:
1.34 anton 311: Address dict_alloc_read(FILE *file, Cell imagesize, Cell dictsize, Cell offset)
1.33 anton 312: {
1.34 anton 313: Address image = MAP_FAILED;
1.33 anton 314:
1.34 anton 315: #if defined(HAVE_MMAP) && !defined(mips_dict_alloc)
1.33 anton 316: if (offset==0) {
1.34 anton 317: image=alloc_mmap(dictsize);
1.33 anton 318: if (debug)
1.34 anton 319: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FIXED|MAP_FILE, imagefile, 0); ", (long)image, (long)imagesize);
320: image = mmap(image, imagesize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FIXED|MAP_FILE|MAP_PRIVATE, fileno(file), 0);
321: after_alloc(image,dictsize);
1.33 anton 322: }
1.34 anton 323: #endif /* defined(MAP_ANON) && !defined(mips_dict_alloc) */
324: if (image == MAP_FAILED) {
325: image = dict_alloc(dictsize+offset)+offset;
1.33 anton 326: rewind(file); /* fseek(imagefile,0L,SEEK_SET); */
1.34 anton 327: fread(image, 1, imagesize, file);
1.33 anton 328: }
329: return image;
330: }
331:
1.10 pazsan 332: void set_stack_sizes(ImageHeader * header)
333: {
334: if (dictsize==0)
335: dictsize = header->dict_size;
336: if (dsize==0)
337: dsize = header->data_stack_size;
338: if (rsize==0)
339: rsize = header->return_stack_size;
340: if (fsize==0)
341: fsize = header->fp_stack_size;
342: if (lsize==0)
343: lsize = header->locals_stack_size;
344: dictsize=maxaligned(dictsize);
345: dsize=maxaligned(dsize);
346: rsize=maxaligned(rsize);
347: lsize=maxaligned(lsize);
348: fsize=maxaligned(fsize);
349: }
350:
351: void alloc_stacks(ImageHeader * header)
352: {
353: header->dict_size=dictsize;
354: header->data_stack_size=dsize;
355: header->fp_stack_size=fsize;
356: header->return_stack_size=rsize;
357: header->locals_stack_size=lsize;
358:
359: header->data_stack_base=my_alloc(dsize);
360: header->fp_stack_base=my_alloc(fsize);
361: header->return_stack_base=my_alloc(rsize);
362: header->locals_stack_base=my_alloc(lsize);
1.48 ! anton 363: code_here = code_area = my_alloc(dictsize);
1.10 pazsan 364: }
365:
1.44 pazsan 366: #warning You can ignore the warnings about clobbered variables in go_forth
1.11 pazsan 367: int go_forth(Address image, int stack, Cell *entries)
368: {
1.38 anton 369: volatile ImageHeader *image_header = (ImageHeader *)image;
1.18 anton 370: Cell *sp0=(Cell*)(image_header->data_stack_base + dsize);
1.44 pazsan 371: Cell *rp0=(Cell *)(image_header->return_stack_base + rsize);
1.18 anton 372: Float *fp0=(Float *)(image_header->fp_stack_base + fsize);
1.44 pazsan 373: #ifdef GFORTH_DEBUGGING
1.38 anton 374: volatile Cell *orig_rp0=rp0;
1.44 pazsan 375: #endif
1.18 anton 376: Address lp0=image_header->locals_stack_base + lsize;
377: Xt *ip0=(Xt *)(image_header->boot_entry);
1.13 pazsan 378: #ifdef SYSSIGNALS
1.11 pazsan 379: int throw_code;
1.13 pazsan 380: #endif
1.11 pazsan 381:
382: /* ensure that the cached elements (if any) are accessible */
1.41 anton 383: IF_spTOS(sp0--);
384: IF_fpTOS(fp0--);
1.11 pazsan 385:
386: for(;stack>0;stack--)
1.18 anton 387: *--sp0=entries[stack-1];
1.11 pazsan 388:
1.30 pazsan 389: #ifdef SYSSIGNALS
1.11 pazsan 390: get_winsize();
391:
392: install_signal_handlers(); /* right place? */
393:
394: if ((throw_code=setjmp(throw_jmp_buf))) {
395: static Cell signal_data_stack[8];
396: static Cell signal_return_stack[8];
397: static Float signal_fp_stack[1];
1.13 pazsan 398:
1.11 pazsan 399: signal_data_stack[7]=throw_code;
1.18 anton 400:
401: #ifdef GFORTH_DEBUGGING
1.38 anton 402: /* fprintf(stderr,"\nrp=%ld\n",(long)rp); */
403: if (rp <= orig_rp0 && rp > (Cell *)(image_header->return_stack_base+5)) {
1.18 anton 404: /* no rstack overflow or underflow */
405: rp0 = rp;
1.27 anton 406: *--rp0 = (Cell)ip;
1.18 anton 407: }
408: else /* I love non-syntactic ifdefs :-) */
409: #endif
410: rp0 = signal_return_stack+8;
1.25 anton 411: /* fprintf(stderr, "rp=$%x\n",rp0);*/
1.11 pazsan 412:
1.33 anton 413: return((int)(Cell)engine(image_header->throw_entry, signal_data_stack+7,
1.18 anton 414: rp0, signal_fp_stack, 0));
1.11 pazsan 415: }
1.13 pazsan 416: #endif
1.11 pazsan 417:
1.33 anton 418: return((int)(Cell)engine(ip0,sp0,rp0,fp0,lp0));
1.11 pazsan 419: }
420:
1.21 anton 421:
1.30 pazsan 422: #ifndef INCLUDE_IMAGE
1.21 anton 423: void print_sizes(Cell sizebyte)
424: /* print size information */
425: {
426: static char* endianstring[]= { " big","little" };
427:
428: fprintf(stderr,"%s endian, cell=%d bytes, char=%d bytes, au=%d bytes\n",
429: endianstring[sizebyte & 1],
430: 1 << ((sizebyte >> 1) & 3),
431: 1 << ((sizebyte >> 3) & 3),
432: 1 << ((sizebyte >> 5) & 3));
433: }
434:
1.47 anton 435: typedef struct {
436: Label start;
437: Cell length; /* excluding the jump */
438: char super_end; /* true if primitive ends superinstruction, i.e.,
439: unconditional branch, execute, etc. */
440: } PrimInfo;
441:
442: PrimInfo *priminfos;
1.48 ! anton 443: Cell npriminfos=0;
1.47 anton 444:
445: void check_prims(Label symbols1[])
446: {
447: #ifndef DOUBLY_INDIRECT
448: int i;
449: Label *symbols2=engine2(0,0,0,0,0);
1.48 ! anton 450: char superend[]={
! 451: #include "prim_superend.i"
! 452: };
1.47 anton 453:
454: for (i=DOESJUMP+1; symbols1[i+1]!=0; i++)
455: ;
456: priminfos = calloc(i,sizeof(PrimInfo));
1.48 ! anton 457: npriminfos = i;
1.47 anton 458: for (i=DOESJUMP+1; symbols1[i+1]!=0; i++) {
459: int prim_len=symbols1[i+1]-symbols1[i];
460: PrimInfo *pi=&priminfos[i];
461: int j;
1.48 ! anton 462: pi->super_end = superend[i-DOESJUMP-1];
1.47 anton 463: for (j=prim_len-3; ; j--) {
464: if (((*(Cell *)(symbols1[i]+j)) & 0xfff8ff) == 0xfc60ff) {
465: /* jmp -4(reg), i.e., the NEXT jump */
466: prim_len = j;
1.48 ! anton 467: if (pi->super_end)
! 468: prim_len += 3; /* include the jump */
1.47 anton 469: break;
470: }
471: if (j==0) { /* NEXT jump not found, e.g., execute */
1.48 ! anton 472: if (!pi->super_end && debug)
! 473: fprintf(stderr, "NEXT jump not found for primitive %d, making it super_end\n", i);
! 474: pi->super_end = 1;
1.47 anton 475: break;
476: }
477: }
478: /* fprintf(stderr,"checking primitive %d: memcmp(%p, %p, %d)\n",
479: i, symbols1[i], symbols2[i], prim_len);*/
480: if (memcmp(symbols1[i],symbols2[i],prim_len)!=0) {
481: if (debug)
482: fprintf(stderr,"Primitive %d not relocatable: memcmp(%p, %p, %d)\n",
483: i, symbols1[i], symbols2[i], prim_len);
484: } else {
485: pi->start = symbols1[i];
486: pi->length = prim_len;
487: if (debug)
488: fprintf(stderr,"Primitive %d relocatable: start %p, length %ld, super_end %d\n",
489: i, pi->start, pi->length, pi->super_end);
490: }
1.48 ! anton 491: }
! 492: #endif
! 493: }
! 494:
! 495: Label compile_prim(Label prim)
! 496: {
! 497: int i;
! 498: Address old_code_here=code_here;
! 499: static Address last_jump=0;
! 500:
! 501: for (i=0; ; i++) {
! 502: if (i>=npriminfos) { /* not a relocatable prim */
! 503: if (last_jump) { /* make sure the last sequence is complete */
! 504: memcpy(code_here, last_jump, 3);
! 505: code_here += 3;
! 506: last_jump = 0;
! 507: }
! 508: return prim;
! 509: }
! 510: if (priminfos[i].start==prim)
! 511: break;
1.47 anton 512: }
1.48 ! anton 513: memcpy(code_here, (Address)prim, priminfos[i].length);
! 514: code_here += priminfos[i].length;
! 515: last_jump = (priminfos[i].super_end) ? 0 : (prim+priminfos[i].length);
! 516: return (Label)old_code_here;
1.47 anton 517: }
518:
1.1 anton 519: Address loader(FILE *imagefile, char* filename)
520: /* returns the address of the image proper (after the preamble) */
521: {
522: ImageHeader header;
523: Address image;
524: Address imp; /* image+preamble */
1.17 anton 525: Char magic[8];
526: char magic7; /* size byte of magic number */
1.1 anton 527: Cell preamblesize=0;
1.6 pazsan 528: Cell data_offset = offset_image ? 56*sizeof(Cell) : 0;
1.1 anton 529: UCell check_sum;
1.15 pazsan 530: Cell ausize = ((RELINFOBITS == 8) ? 0 :
531: (RELINFOBITS == 16) ? 1 :
532: (RELINFOBITS == 32) ? 2 : 3);
533: Cell charsize = ((sizeof(Char) == 1) ? 0 :
534: (sizeof(Char) == 2) ? 1 :
535: (sizeof(Char) == 4) ? 2 : 3) + ausize;
536: Cell cellsize = ((sizeof(Cell) == 1) ? 0 :
537: (sizeof(Cell) == 2) ? 1 :
538: (sizeof(Cell) == 4) ? 2 : 3) + ausize;
1.21 anton 539: Cell sizebyte = (ausize << 5) + (charsize << 3) + (cellsize << 1) +
540: #ifdef WORDS_BIGENDIAN
541: 0
542: #else
543: 1
544: #endif
545: ;
1.1 anton 546:
1.43 anton 547: vm_prims = engine(0,0,0,0,0);
1.47 anton 548: check_prims(vm_prims);
1.1 anton 549: #ifndef DOUBLY_INDIRECT
1.43 anton 550: check_sum = checksum(vm_prims);
1.1 anton 551: #else /* defined(DOUBLY_INDIRECT) */
1.43 anton 552: check_sum = (UCell)vm_prims;
1.1 anton 553: #endif /* defined(DOUBLY_INDIRECT) */
1.10 pazsan 554:
555: do {
556: if(fread(magic,sizeof(Char),8,imagefile) < 8) {
1.15 pazsan 557: fprintf(stderr,"%s: image %s doesn't seem to be a Gforth (>=0.4) image.\n",
1.10 pazsan 558: progname, filename);
559: exit(1);
1.1 anton 560: }
1.10 pazsan 561: preamblesize+=8;
1.15 pazsan 562: } while(memcmp(magic,"Gforth2",7));
1.17 anton 563: magic7 = magic[7];
1.1 anton 564: if (debug) {
1.17 anton 565: magic[7]='\0';
1.21 anton 566: fprintf(stderr,"Magic found: %s ", magic);
567: print_sizes(magic7);
1.1 anton 568: }
569:
1.21 anton 570: if (magic7 != sizebyte)
571: {
572: fprintf(stderr,"This image is: ");
573: print_sizes(magic7);
574: fprintf(stderr,"whereas the machine is ");
575: print_sizes(sizebyte);
1.1 anton 576: exit(-2);
577: };
578:
579: fread((void *)&header,sizeof(ImageHeader),1,imagefile);
1.10 pazsan 580:
581: set_stack_sizes(&header);
1.1 anton 582:
583: #if HAVE_GETPAGESIZE
584: pagesize=getpagesize(); /* Linux/GNU libc offers this */
585: #elif HAVE_SYSCONF && defined(_SC_PAGESIZE)
586: pagesize=sysconf(_SC_PAGESIZE); /* POSIX.4 */
587: #elif PAGESIZE
588: pagesize=PAGESIZE; /* in limits.h according to Gallmeister's POSIX.4 book */
589: #endif
590: if (debug)
1.5 jwilke 591: fprintf(stderr,"pagesize=%ld\n",(unsigned long) pagesize);
1.1 anton 592:
1.34 anton 593: image = dict_alloc_read(imagefile, preamblesize+header.image_size,
594: preamblesize+dictsize, data_offset);
1.33 anton 595: imp=image+preamblesize;
1.1 anton 596: if (clear_dictionary)
1.33 anton 597: memset(imp+header.image_size, 0, dictsize-header.image_size);
1.46 jwilke 598: if(header.base==0 || header.base == 0x100) {
1.1 anton 599: Cell reloc_size=((header.image_size-1)/sizeof(Cell))/8+1;
600: char reloc_bits[reloc_size];
1.33 anton 601: fseek(imagefile, preamblesize+header.image_size, SEEK_SET);
1.10 pazsan 602: fread(reloc_bits, 1, reloc_size, imagefile);
1.45 jwilke 603: relocate((Cell *)imp, reloc_bits, header.image_size, header.base, vm_prims);
1.1 anton 604: #if 0
605: { /* let's see what the relocator did */
606: FILE *snapshot=fopen("snapshot.fi","wb");
607: fwrite(image,1,imagesize,snapshot);
608: fclose(snapshot);
609: }
610: #endif
1.46 jwilke 611: }
612: else if(header.base!=imp) {
613: fprintf(stderr,"%s: Cannot load nonrelocatable image (compiled for address $%lx) at address $%lx\n",
614: progname, (unsigned long)header.base, (unsigned long)imp);
615: exit(1);
1.1 anton 616: }
617: if (header.checksum==0)
618: ((ImageHeader *)imp)->checksum=check_sum;
619: else if (header.checksum != check_sum) {
620: fprintf(stderr,"%s: Checksum of image ($%lx) does not match the executable ($%lx)\n",
621: progname, (unsigned long)(header.checksum),(unsigned long)check_sum);
622: exit(1);
623: }
624: fclose(imagefile);
625:
1.10 pazsan 626: alloc_stacks((ImageHeader *)imp);
1.1 anton 627:
628: CACHE_FLUSH(imp, header.image_size);
629:
630: return imp;
631: }
632:
1.28 anton 633: /* index of last '/' or '\' in file, 0 if there is none. !! Hmm, could
634: be implemented with strrchr and the separator should be
635: OS-dependent */
1.1 anton 636: int onlypath(char *file)
1.10 pazsan 637: {
638: int i;
1.1 anton 639: i=strlen(file);
1.10 pazsan 640: while (i) {
641: if (file[i]=='\\' || file[i]=='/') break;
642: i--;
643: }
644: return i;
1.1 anton 645: }
646:
647: FILE *openimage(char *fullfilename)
1.10 pazsan 648: {
649: FILE *image_file;
1.28 anton 650: char * expfilename = tilde_cstr(fullfilename, strlen(fullfilename), 1);
1.10 pazsan 651:
1.28 anton 652: image_file=fopen(expfilename,"rb");
1.1 anton 653: if (image_file!=NULL && debug)
1.28 anton 654: fprintf(stderr, "Opened image file: %s\n", expfilename);
1.10 pazsan 655: return image_file;
1.1 anton 656: }
657:
1.28 anton 658: /* try to open image file concat(path[0:len],imagename) */
1.1 anton 659: FILE *checkimage(char *path, int len, char *imagename)
1.10 pazsan 660: {
661: int dirlen=len;
1.1 anton 662: char fullfilename[dirlen+strlen(imagename)+2];
1.10 pazsan 663:
1.1 anton 664: memcpy(fullfilename, path, dirlen);
665: if (fullfilename[dirlen-1]!='/')
666: fullfilename[dirlen++]='/';
667: strcpy(fullfilename+dirlen,imagename);
1.10 pazsan 668: return openimage(fullfilename);
1.1 anton 669: }
670:
1.10 pazsan 671: FILE * open_image_file(char * imagename, char * path)
1.1 anton 672: {
1.10 pazsan 673: FILE * image_file=NULL;
1.28 anton 674: char *origpath=path;
1.10 pazsan 675:
676: if(strchr(imagename, '/')==NULL) {
677: /* first check the directory where the exe file is in !! 01may97jaw */
678: if (onlypath(progname))
679: image_file=checkimage(progname, onlypath(progname), imagename);
680: if (!image_file)
681: do {
682: char *pend=strchr(path, PATHSEP);
683: if (pend==NULL)
684: pend=path+strlen(path);
685: if (strlen(path)==0) break;
686: image_file=checkimage(path, pend-path, imagename);
687: path=pend+(*pend==PATHSEP);
688: } while (image_file==NULL);
689: } else {
690: image_file=openimage(imagename);
691: }
1.1 anton 692:
1.10 pazsan 693: if (!image_file) {
694: fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n",
1.28 anton 695: progname, imagename, origpath);
1.10 pazsan 696: exit(1);
1.7 anton 697: }
698:
1.10 pazsan 699: return image_file;
700: }
1.11 pazsan 701: #endif
702:
703: #ifdef HAS_OS
704: UCell convsize(char *s, UCell elemsize)
705: /* converts s of the format [0-9]+[bekMGT]? (e.g. 25k) into the number
706: of bytes. the letter at the end indicates the unit, where e stands
707: for the element size. default is e */
708: {
709: char *endp;
710: UCell n,m;
711:
712: m = elemsize;
713: n = strtoul(s,&endp,0);
714: if (endp!=NULL) {
715: if (strcmp(endp,"b")==0)
716: m=1;
717: else if (strcmp(endp,"k")==0)
718: m=1024;
719: else if (strcmp(endp,"M")==0)
720: m=1024*1024;
721: else if (strcmp(endp,"G")==0)
722: m=1024*1024*1024;
723: else if (strcmp(endp,"T")==0) {
724: #if (SIZEOF_CHAR_P > 4)
1.24 anton 725: m=1024L*1024*1024*1024;
1.11 pazsan 726: #else
727: fprintf(stderr,"%s: size specification \"%s\" too large for this machine\n", progname, endp);
728: exit(1);
729: #endif
730: } else if (strcmp(endp,"e")!=0 && strcmp(endp,"")!=0) {
731: fprintf(stderr,"%s: cannot grok size specification %s: invalid unit \"%s\"\n", progname, s, endp);
732: exit(1);
733: }
734: }
735: return n*m;
736: }
1.10 pazsan 737:
738: void gforth_args(int argc, char ** argv, char ** path, char ** imagename)
739: {
740: int c;
741:
1.1 anton 742: opterr=0;
743: while (1) {
744: int option_index=0;
745: static struct option opts[] = {
1.29 anton 746: {"appl-image", required_argument, NULL, 'a'},
1.1 anton 747: {"image-file", required_argument, NULL, 'i'},
748: {"dictionary-size", required_argument, NULL, 'm'},
749: {"data-stack-size", required_argument, NULL, 'd'},
750: {"return-stack-size", required_argument, NULL, 'r'},
751: {"fp-stack-size", required_argument, NULL, 'f'},
752: {"locals-stack-size", required_argument, NULL, 'l'},
753: {"path", required_argument, NULL, 'p'},
754: {"version", no_argument, NULL, 'v'},
755: {"help", no_argument, NULL, 'h'},
756: /* put something != 0 into offset_image */
757: {"offset-image", no_argument, &offset_image, 1},
758: {"no-offset-im", no_argument, &offset_image, 0},
759: {"clear-dictionary", no_argument, &clear_dictionary, 1},
1.4 anton 760: {"die-on-signal", no_argument, &die_on_signal, 1},
1.1 anton 761: {"debug", no_argument, &debug, 1},
762: {0,0,0,0}
763: /* no-init-file, no-rc? */
764: };
765:
1.36 pazsan 766: c = getopt_long(argc, argv, "+i:m:d:r:f:l:p:vhoncsx", opts, &option_index);
1.1 anton 767:
768: switch (c) {
1.29 anton 769: case EOF: return;
770: case '?': optind--; return;
771: case 'a': *imagename = optarg; return;
1.10 pazsan 772: case 'i': *imagename = optarg; break;
1.1 anton 773: case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
774: case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
775: case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
776: case 'f': fsize = convsize(optarg,sizeof(Float)); break;
777: case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
1.10 pazsan 778: case 'p': *path = optarg; break;
1.36 pazsan 779: case 'o': offset_image = 1; break;
780: case 'n': offset_image = 0; break;
781: case 'c': clear_dictionary = 1; break;
782: case 's': die_on_signal = 1; break;
783: case 'x': debug = 1; break;
1.8 anton 784: case 'v': fprintf(stderr, "gforth %s\n", VERSION); exit(0);
1.1 anton 785: case 'h':
1.29 anton 786: fprintf(stderr, "Usage: %s [engine options] ['--'] [image arguments]\n\
1.1 anton 787: Engine Options:\n\
1.29 anton 788: --appl-image FILE equivalent to '--image-file=FILE --'\n\
1.10 pazsan 789: --clear-dictionary Initialize the dictionary with 0 bytes\n\
790: -d SIZE, --data-stack-size=SIZE Specify data stack size\n\
791: --debug Print debugging information during startup\n\
792: --die-on-signal exit instead of CATCHing some signals\n\
793: -f SIZE, --fp-stack-size=SIZE Specify floating point stack size\n\
794: -h, --help Print this message and exit\n\
795: -i FILE, --image-file=FILE Use image FILE instead of `gforth.fi'\n\
796: -l SIZE, --locals-stack-size=SIZE Specify locals stack size\n\
797: -m SIZE, --dictionary-size=SIZE Specify Forth dictionary size\n\
798: --no-offset-im Load image at normal position\n\
799: --offset-image Load image at a different position\n\
800: -p PATH, --path=PATH Search path for finding image and sources\n\
801: -r SIZE, --return-stack-size=SIZE Specify return stack size\n\
802: -v, --version Print version and exit\n\
1.1 anton 803: SIZE arguments consist of an integer followed by a unit. The unit can be\n\
1.10 pazsan 804: `b' (byte), `e' (element; default), `k' (KB), `M' (MB), `G' (GB) or `T' (TB).\n",
805: argv[0]);
806: optind--;
807: return;
1.1 anton 808: }
809: }
1.10 pazsan 810: }
1.11 pazsan 811: #endif
1.10 pazsan 812:
813: #ifdef INCLUDE_IMAGE
814: extern Cell image[];
815: extern const char reloc_bits[];
816: #endif
817:
818: int main(int argc, char **argv, char **env)
819: {
1.30 pazsan 820: #ifdef HAS_OS
1.10 pazsan 821: char *path = getenv("GFORTHPATH") ? : DEFAULTPATH;
1.30 pazsan 822: #else
823: char *path = DEFAULTPATH;
824: #endif
1.13 pazsan 825: #ifndef INCLUDE_IMAGE
1.10 pazsan 826: char *imagename="gforth.fi";
827: FILE *image_file;
828: Address image;
829: #endif
830: int retvalue;
831:
832: #if defined(i386) && defined(ALIGNMENT_CHECK) && !defined(DIRECT_THREADED)
833: /* turn on alignment checks on the 486.
834: * on the 386 this should have no effect. */
835: __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
836: /* this is unusable with Linux' libc.4.6.27, because this library is
837: not alignment-clean; we would have to replace some library
838: functions (e.g., memcpy) to make it work. Also GCC doesn't try to keep
839: the stack FP-aligned. */
840: #endif
841:
842: /* buffering of the user output device */
1.11 pazsan 843: #ifdef _IONBF
1.10 pazsan 844: if (isatty(fileno(stdout))) {
845: fflush(stdout);
846: setvbuf(stdout,NULL,_IONBF,0);
1.1 anton 847: }
1.11 pazsan 848: #endif
1.1 anton 849:
1.10 pazsan 850: progname = argv[0];
851:
1.11 pazsan 852: #ifdef HAS_OS
1.10 pazsan 853: gforth_args(argc, argv, &path, &imagename);
1.11 pazsan 854: #endif
1.10 pazsan 855:
856: #ifdef INCLUDE_IMAGE
857: set_stack_sizes((ImageHeader *)image);
1.22 pazsan 858: if(((ImageHeader *)image)->base != image)
859: relocate(image, reloc_bits, ((ImageHeader *)image)->image_size,
860: (Label*)engine(0, 0, 0, 0, 0));
1.10 pazsan 861: alloc_stacks((ImageHeader *)image);
862: #else
863: image_file = open_image_file(imagename, path);
864: image = loader(image_file, imagename);
865: #endif
1.24 anton 866: gforth_header=(ImageHeader *)image; /* used in SIGSEGV handler */
1.1 anton 867:
868: {
1.10 pazsan 869: char path2[strlen(path)+1];
1.1 anton 870: char *p1, *p2;
871: Cell environ[]= {
872: (Cell)argc-(optind-1),
873: (Cell)(argv+(optind-1)),
1.10 pazsan 874: (Cell)strlen(path),
1.1 anton 875: (Cell)path2};
876: argv[optind-1] = progname;
877: /*
878: for (i=0; i<environ[0]; i++)
879: printf("%s\n", ((char **)(environ[1]))[i]);
880: */
881: /* make path OS-independent by replacing path separators with NUL */
1.10 pazsan 882: for (p1=path, p2=path2; *p1!='\0'; p1++, p2++)
1.1 anton 883: if (*p1==PATHSEP)
884: *p2 = '\0';
885: else
886: *p2 = *p1;
887: *p2='\0';
1.10 pazsan 888: retvalue = go_forth(image, 4, environ);
1.42 anton 889: #ifdef VM_PROFILING
890: vm_print_profile(stderr);
891: #endif
1.1 anton 892: deprep_terminal();
893: }
1.13 pazsan 894: return retvalue;
1.1 anton 895: }
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