Annotation of gforth/engine/main.c, revision 1.54
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:
1.53 anton 60: #if defined(DIRECT_THREADED)
61: /*# define CA(n) (symbols[(n)])*/
62: # define CA(n) (symbols[(n)&~0x4000UL])
63: #elif defined(DOUBLY_INDIRECT)
64: /* # define CA(n) ((Cell)(symbols+((n)&~0x4000UL))) */
65: # define CA(n) ({Cell _n = (n); ((Cell)(((_n & 0x4000) ? symbols : xts)+(_n&~0x4000UL)));})
1.1 anton 66: #else
1.53 anton 67: # define CA(n) ((Cell)(symbols+((n)&~0x4000UL)))
1.1 anton 68: #endif
69:
70: #define maxaligned(n) (typeof(n))((((Cell)n)+sizeof(Float)-1)&-sizeof(Float))
71:
72: static UCell dictsize=0;
73: static UCell dsize=0;
74: static UCell rsize=0;
75: static UCell fsize=0;
76: static UCell lsize=0;
77: int offset_image=0;
1.4 anton 78: int die_on_signal=0;
1.13 pazsan 79: #ifndef INCLUDE_IMAGE
1.1 anton 80: static int clear_dictionary=0;
1.24 anton 81: UCell pagesize=1;
1.22 pazsan 82: char *progname;
83: #else
84: char *progname = "gforth";
85: int optind = 1;
1.13 pazsan 86: #endif
1.31 pazsan 87:
1.48 anton 88: Address code_area=0;
89: Address code_here=0; /* does for code-area what HERE does for the dictionary */
90:
1.30 pazsan 91: #ifdef HAS_DEBUG
1.1 anton 92: static int debug=0;
1.31 pazsan 93: #else
94: # define debug 0
95: # define perror(x...)
96: # define fprintf(x...)
1.30 pazsan 97: #endif
1.31 pazsan 98:
1.24 anton 99: ImageHeader *gforth_header;
1.43 anton 100: Label *vm_prims;
1.53 anton 101: #ifdef DOUBLY_INDIRECT
102: Label *xts; /* same content as vm_prims, but should only be used for xts */
103: #endif
1.1 anton 104:
1.30 pazsan 105: #ifdef MEMCMP_AS_SUBROUTINE
106: int gforth_memcmp(const char * s1, const char * s2, size_t n)
107: {
108: return memcmp(s1, s2, n);
109: }
110: #endif
111:
1.1 anton 112: /* image file format:
1.15 pazsan 113: * "#! binary-path -i\n" (e.g., "#! /usr/local/bin/gforth-0.4.0 -i\n")
1.1 anton 114: * padding to a multiple of 8
1.15 pazsan 115: * magic: "Gforth2x" means format 0.4,
116: * where x is a byte with
117: * bit 7: reserved = 0
118: * bit 6:5: address unit size 2^n octets
119: * bit 4:3: character size 2^n octets
120: * bit 2:1: cell size 2^n octets
121: * bit 0: endian, big=0, little=1.
122: * The magic are always 8 octets, no matter what the native AU/character size is
1.1 anton 123: * padding to max alignment (no padding necessary on current machines)
1.24 anton 124: * ImageHeader structure (see forth.h)
1.1 anton 125: * data (size in ImageHeader.image_size)
126: * tags ((if relocatable, 1 bit/data cell)
127: *
128: * tag==1 means that the corresponding word is an address;
129: * If the word is >=0, the address is within the image;
130: * addresses within the image are given relative to the start of the image.
131: * If the word =-1 (CF_NIL), the address is NIL,
132: * If the word is <CF_NIL and >CF(DODOES), it's a CFA (:, Create, ...)
133: * If the word =CF(DODOES), it's a DOES> CFA
134: * If the word =CF(DOESJUMP), it's a DOES JUMP (2 Cells after DOES>,
135: * possibly containing a jump to dodoes)
1.51 anton 136: * If the word is <CF(DOESJUMP) and bit 14 is set, it's the xt of a primitive
137: * If the word is <CF(DOESJUMP) and bit 14 is clear,
138: * it's the threaded code of a primitive
1.1 anton 139: */
140:
1.46 jwilke 141: void relocate(Cell *image, const char *bitstring,
142: int size, int base, Label symbols[])
1.1 anton 143: {
1.16 pazsan 144: int i=0, j, k, steps=(size/sizeof(Cell))/RELINFOBITS;
1.11 pazsan 145: Cell token;
1.1 anton 146: char bits;
1.37 anton 147: Cell max_symbols;
1.46 jwilke 148: /*
149: * A virtial start address that's the real start address minus
150: * the one in the image
151: */
1.45 jwilke 152: Cell *start = (Cell * ) (((void *) image) - ((void *) base));
1.1 anton 153:
1.46 jwilke 154:
155: /* printf("relocating to %x[%x] start=%x base=%x\n", image, size, start, base); */
1.37 anton 156:
157: for (max_symbols=DOESJUMP+1; symbols[max_symbols]!=0; max_symbols++)
158: ;
1.47 anton 159: max_symbols--;
1.35 pazsan 160: size/=sizeof(Cell);
161:
1.31 pazsan 162: for(k=0; k<=steps; k++) {
1.13 pazsan 163: for(j=0, bits=bitstring[k]; j<RELINFOBITS; j++, i++, bits<<=1) {
1.1 anton 164: /* fprintf(stderr,"relocate: image[%d]\n", i);*/
1.35 pazsan 165: if((i < size) && (bits & (1U << (RELINFOBITS-1)))) {
166: /* fprintf(stderr,"relocate: image[%d]=%d of %d\n", i, image[i], size/sizeof(Cell)); */
1.45 jwilke 167: token=image[i];
168: if(token<0)
1.11 pazsan 169: switch(token)
1.1 anton 170: {
171: case CF_NIL : image[i]=0; break;
172: #if !defined(DOUBLY_INDIRECT)
173: case CF(DOCOL) :
174: case CF(DOVAR) :
175: case CF(DOCON) :
176: case CF(DOUSER) :
177: case CF(DODEFER) :
1.11 pazsan 178: case CF(DOFIELD) : MAKE_CF(image+i,symbols[CF(token)]); break;
1.1 anton 179: case CF(DOESJUMP): MAKE_DOES_HANDLER(image+i); break;
180: #endif /* !defined(DOUBLY_INDIRECT) */
181: case CF(DODOES) :
1.45 jwilke 182: MAKE_DOES_CF(image+i,(Xt *)(image[i+1]+((Cell)start)));
1.1 anton 183: break;
184: default :
185: /* printf("Code field generation image[%x]:=CA(%x)\n",
186: i, CF(image[i])); */
1.52 pazsan 187: #if !defined(DOUBLY_INDIRECT)
188: if (((token | 0x4000) >= CF(DODOES)) && (token < -0x4000))
1.53 anton 189: fprintf(stderr,"Doer %d used in this image at $%lx is marked as Xt;\n executing this code will crash.\n",CF((token | 0x4000)),(long)&image[i],VERSION);
1.52 pazsan 190: #endif
1.53 anton 191: if (CF((token | 0x4000))<max_symbols)
1.37 anton 192: image[i]=(Cell)CA(CF(token));
193: else
194: fprintf(stderr,"Primitive %d used in this image at $%lx is not implemented by this\n engine (%s); executing this code will crash.\n",CF(token),(long)&image[i],VERSION);
1.1 anton 195: }
1.46 jwilke 196: else {
1.45 jwilke 197: // if base is > 0: 0 is a null reference so don't adjust
198: if (token>=base) {
199: image[i]+=(Cell)start;
200: }
1.46 jwilke 201: }
1.1 anton 202: }
203: }
1.31 pazsan 204: }
1.26 jwilke 205: ((ImageHeader*)(image))->base = (Address) image;
1.1 anton 206: }
207:
208: UCell checksum(Label symbols[])
209: {
210: UCell r=PRIM_VERSION;
211: Cell i;
212:
213: for (i=DOCOL; i<=DOESJUMP; i++) {
214: r ^= (UCell)(symbols[i]);
215: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
216: }
217: #ifdef DIRECT_THREADED
218: /* we have to consider all the primitives */
219: for (; symbols[i]!=(Label)0; i++) {
220: r ^= (UCell)(symbols[i]);
221: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
222: }
223: #else
224: /* in indirect threaded code all primitives are accessed through the
225: symbols table, so we just have to put the base address of symbols
226: in the checksum */
227: r ^= (UCell)symbols;
228: #endif
229: return r;
230: }
231:
1.3 anton 232: Address verbose_malloc(Cell size)
233: {
234: Address r;
235: /* leave a little room (64B) for stack underflows */
236: if ((r = malloc(size+64))==NULL) {
237: perror(progname);
238: exit(1);
239: }
240: r = (Address)((((Cell)r)+(sizeof(Float)-1))&(-sizeof(Float)));
241: if (debug)
242: fprintf(stderr, "malloc succeeds, address=$%lx\n", (long)r);
243: return r;
244: }
245:
1.33 anton 246: static Address next_address=0;
247: void after_alloc(Address r, Cell size)
248: {
249: if (r != (Address)-1) {
250: if (debug)
251: fprintf(stderr, "success, address=$%lx\n", (long) r);
252: if (pagesize != 1)
253: next_address = (Address)(((((Cell)r)+size-1)&-pagesize)+2*pagesize); /* leave one page unmapped */
254: } else {
255: if (debug)
256: fprintf(stderr, "failed: %s\n", strerror(errno));
257: }
258: }
259:
1.34 anton 260: #ifndef MAP_FAILED
261: #define MAP_FAILED ((Address) -1)
262: #endif
263: #ifndef MAP_FILE
264: # define MAP_FILE 0
265: #endif
266: #ifndef MAP_PRIVATE
267: # define MAP_PRIVATE 0
268: #endif
269:
270: #if defined(HAVE_MMAP)
271: static Address alloc_mmap(Cell size)
1.1 anton 272: {
273: Address r;
274:
275: #if defined(MAP_ANON)
276: if (debug)
277: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_ANON, ...); ", (long)next_address, (long)size);
1.34 anton 278: r = mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
1.1 anton 279: #else /* !defined(MAP_ANON) */
1.17 anton 280: /* Ultrix (at least) does not define MAP_FILE and MAP_PRIVATE (both are
281: apparently defaults) */
1.1 anton 282: static int dev_zero=-1;
283:
284: if (dev_zero == -1)
285: dev_zero = open("/dev/zero", O_RDONLY);
286: if (dev_zero == -1) {
1.34 anton 287: r = MAP_FAILED;
1.1 anton 288: if (debug)
289: fprintf(stderr, "open(\"/dev/zero\"...) failed (%s), no mmap; ",
290: strerror(errno));
291: } else {
292: if (debug)
293: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FILE, dev_zero, ...); ", (long)next_address, (long)size);
294: r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FILE|MAP_PRIVATE, dev_zero, 0);
295: }
296: #endif /* !defined(MAP_ANON) */
1.34 anton 297: after_alloc(r, size);
298: return r;
299: }
300: #endif
301:
302: Address my_alloc(Cell size)
303: {
304: #if HAVE_MMAP
305: Address r;
306:
307: r=alloc_mmap(size);
308: if (r!=MAP_FAILED)
1.1 anton 309: return r;
310: #endif /* HAVE_MMAP */
1.3 anton 311: /* use malloc as fallback */
312: return verbose_malloc(size);
1.1 anton 313: }
314:
1.3 anton 315: #if (defined(mips) && !defined(INDIRECT_THREADED))
316: /* the 256MB jump restriction on the MIPS architecture makes the
317: combination of direct threading and mmap unsafe. */
1.33 anton 318: #define mips_dict_alloc 1
1.3 anton 319: #define dict_alloc(size) verbose_malloc(size)
320: #else
321: #define dict_alloc(size) my_alloc(size)
322: #endif
323:
1.34 anton 324: Address dict_alloc_read(FILE *file, Cell imagesize, Cell dictsize, Cell offset)
1.33 anton 325: {
1.34 anton 326: Address image = MAP_FAILED;
1.33 anton 327:
1.34 anton 328: #if defined(HAVE_MMAP) && !defined(mips_dict_alloc)
1.33 anton 329: if (offset==0) {
1.34 anton 330: image=alloc_mmap(dictsize);
1.33 anton 331: if (debug)
1.34 anton 332: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FIXED|MAP_FILE, imagefile, 0); ", (long)image, (long)imagesize);
333: image = mmap(image, imagesize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FIXED|MAP_FILE|MAP_PRIVATE, fileno(file), 0);
334: after_alloc(image,dictsize);
1.33 anton 335: }
1.34 anton 336: #endif /* defined(MAP_ANON) && !defined(mips_dict_alloc) */
337: if (image == MAP_FAILED) {
338: image = dict_alloc(dictsize+offset)+offset;
1.33 anton 339: rewind(file); /* fseek(imagefile,0L,SEEK_SET); */
1.34 anton 340: fread(image, 1, imagesize, file);
1.33 anton 341: }
342: return image;
343: }
344:
1.10 pazsan 345: void set_stack_sizes(ImageHeader * header)
346: {
347: if (dictsize==0)
348: dictsize = header->dict_size;
349: if (dsize==0)
350: dsize = header->data_stack_size;
351: if (rsize==0)
352: rsize = header->return_stack_size;
353: if (fsize==0)
354: fsize = header->fp_stack_size;
355: if (lsize==0)
356: lsize = header->locals_stack_size;
357: dictsize=maxaligned(dictsize);
358: dsize=maxaligned(dsize);
359: rsize=maxaligned(rsize);
360: lsize=maxaligned(lsize);
361: fsize=maxaligned(fsize);
362: }
363:
364: void alloc_stacks(ImageHeader * header)
365: {
366: header->dict_size=dictsize;
367: header->data_stack_size=dsize;
368: header->fp_stack_size=fsize;
369: header->return_stack_size=rsize;
370: header->locals_stack_size=lsize;
371:
372: header->data_stack_base=my_alloc(dsize);
373: header->fp_stack_base=my_alloc(fsize);
374: header->return_stack_base=my_alloc(rsize);
375: header->locals_stack_base=my_alloc(lsize);
1.48 anton 376: code_here = code_area = my_alloc(dictsize);
1.10 pazsan 377: }
378:
1.44 pazsan 379: #warning You can ignore the warnings about clobbered variables in go_forth
1.11 pazsan 380: int go_forth(Address image, int stack, Cell *entries)
381: {
1.38 anton 382: volatile ImageHeader *image_header = (ImageHeader *)image;
1.18 anton 383: Cell *sp0=(Cell*)(image_header->data_stack_base + dsize);
1.44 pazsan 384: Cell *rp0=(Cell *)(image_header->return_stack_base + rsize);
1.18 anton 385: Float *fp0=(Float *)(image_header->fp_stack_base + fsize);
1.44 pazsan 386: #ifdef GFORTH_DEBUGGING
1.38 anton 387: volatile Cell *orig_rp0=rp0;
1.44 pazsan 388: #endif
1.18 anton 389: Address lp0=image_header->locals_stack_base + lsize;
390: Xt *ip0=(Xt *)(image_header->boot_entry);
1.13 pazsan 391: #ifdef SYSSIGNALS
1.11 pazsan 392: int throw_code;
1.13 pazsan 393: #endif
1.11 pazsan 394:
395: /* ensure that the cached elements (if any) are accessible */
1.41 anton 396: IF_spTOS(sp0--);
397: IF_fpTOS(fp0--);
1.11 pazsan 398:
399: for(;stack>0;stack--)
1.18 anton 400: *--sp0=entries[stack-1];
1.11 pazsan 401:
1.30 pazsan 402: #ifdef SYSSIGNALS
1.11 pazsan 403: get_winsize();
404:
405: install_signal_handlers(); /* right place? */
406:
407: if ((throw_code=setjmp(throw_jmp_buf))) {
408: static Cell signal_data_stack[8];
409: static Cell signal_return_stack[8];
410: static Float signal_fp_stack[1];
1.13 pazsan 411:
1.11 pazsan 412: signal_data_stack[7]=throw_code;
1.18 anton 413:
414: #ifdef GFORTH_DEBUGGING
1.38 anton 415: /* fprintf(stderr,"\nrp=%ld\n",(long)rp); */
416: if (rp <= orig_rp0 && rp > (Cell *)(image_header->return_stack_base+5)) {
1.18 anton 417: /* no rstack overflow or underflow */
418: rp0 = rp;
1.27 anton 419: *--rp0 = (Cell)ip;
1.18 anton 420: }
421: else /* I love non-syntactic ifdefs :-) */
422: #endif
423: rp0 = signal_return_stack+8;
1.25 anton 424: /* fprintf(stderr, "rp=$%x\n",rp0);*/
1.11 pazsan 425:
1.33 anton 426: return((int)(Cell)engine(image_header->throw_entry, signal_data_stack+7,
1.18 anton 427: rp0, signal_fp_stack, 0));
1.11 pazsan 428: }
1.13 pazsan 429: #endif
1.11 pazsan 430:
1.33 anton 431: return((int)(Cell)engine(ip0,sp0,rp0,fp0,lp0));
1.11 pazsan 432: }
433:
1.21 anton 434:
1.30 pazsan 435: #ifndef INCLUDE_IMAGE
1.21 anton 436: void print_sizes(Cell sizebyte)
437: /* print size information */
438: {
439: static char* endianstring[]= { " big","little" };
440:
441: fprintf(stderr,"%s endian, cell=%d bytes, char=%d bytes, au=%d bytes\n",
442: endianstring[sizebyte & 1],
443: 1 << ((sizebyte >> 1) & 3),
444: 1 << ((sizebyte >> 3) & 3),
445: 1 << ((sizebyte >> 5) & 3));
446: }
447:
1.47 anton 448: typedef struct {
449: Label start;
450: Cell length; /* excluding the jump */
451: char super_end; /* true if primitive ends superinstruction, i.e.,
452: unconditional branch, execute, etc. */
453: } PrimInfo;
454:
455: PrimInfo *priminfos;
1.48 anton 456: Cell npriminfos=0;
1.47 anton 457:
458: void check_prims(Label symbols1[])
459: {
1.50 anton 460: #if defined(IS_NEXT_JUMP) && !defined(DOUBLY_INDIRECT)
1.47 anton 461: int i;
462: Label *symbols2=engine2(0,0,0,0,0);
1.49 anton 463: static char superend[]={
1.48 anton 464: #include "prim_superend.i"
465: };
1.47 anton 466:
467: for (i=DOESJUMP+1; symbols1[i+1]!=0; i++)
468: ;
469: priminfos = calloc(i,sizeof(PrimInfo));
1.48 anton 470: npriminfos = i;
1.47 anton 471: for (i=DOESJUMP+1; symbols1[i+1]!=0; i++) {
472: int prim_len=symbols1[i+1]-symbols1[i];
473: PrimInfo *pi=&priminfos[i];
474: int j;
1.48 anton 475: pi->super_end = superend[i-DOESJUMP-1];
1.50 anton 476: for (j=prim_len-IND_JUMP_LENGTH; ; j--) {
477: if (IS_NEXT_JUMP(symbols1[i]+j)) {
1.47 anton 478: prim_len = j;
1.48 anton 479: if (pi->super_end)
1.50 anton 480: prim_len += IND_JUMP_LENGTH; /* include the jump */
1.47 anton 481: break;
482: }
483: if (j==0) { /* NEXT jump not found, e.g., execute */
1.48 anton 484: if (!pi->super_end && debug)
485: fprintf(stderr, "NEXT jump not found for primitive %d, making it super_end\n", i);
486: pi->super_end = 1;
1.47 anton 487: break;
488: }
489: }
490: /* fprintf(stderr,"checking primitive %d: memcmp(%p, %p, %d)\n",
491: i, symbols1[i], symbols2[i], prim_len);*/
492: if (memcmp(symbols1[i],symbols2[i],prim_len)!=0) {
493: if (debug)
494: fprintf(stderr,"Primitive %d not relocatable: memcmp(%p, %p, %d)\n",
495: i, symbols1[i], symbols2[i], prim_len);
496: } else {
497: pi->start = symbols1[i];
498: pi->length = prim_len;
499: if (debug)
500: fprintf(stderr,"Primitive %d relocatable: start %p, length %ld, super_end %d\n",
501: i, pi->start, pi->length, pi->super_end);
502: }
1.48 anton 503: }
504: #endif
505: }
506:
507: Label compile_prim(Label prim)
508: {
1.54 ! anton 509: #ifdef DOUBLY_INDIRECT
! 510: if (prim<((Label)(xts+DOESJUMP)) || prim>((Label)(xts+npriminfos))) {
! 511: fprintf(stderr,"compile_prim encountered xt %p\n", prim);
! 512: return prim;
! 513: } else
! 514: return prim-((Label)xts)+((Label)vm_prims);
! 515: #else /* !defined(DOUBLY_INDIRECT) */
1.50 anton 516: #ifdef IND_JUMP_LENGTH
1.48 anton 517: int i;
518: Address old_code_here=code_here;
519: static Address last_jump=0;
520:
521: for (i=0; ; i++) {
522: if (i>=npriminfos) { /* not a relocatable prim */
523: if (last_jump) { /* make sure the last sequence is complete */
1.50 anton 524: memcpy(code_here, last_jump, IND_JUMP_LENGTH);
525: code_here += IND_JUMP_LENGTH;
1.48 anton 526: last_jump = 0;
527: }
528: return prim;
529: }
530: if (priminfos[i].start==prim)
531: break;
1.47 anton 532: }
1.50 anton 533: #ifdef ALIGN_CODE
534: ALIGN_CODE;
535: #endif
1.48 anton 536: memcpy(code_here, (Address)prim, priminfos[i].length);
537: code_here += priminfos[i].length;
538: last_jump = (priminfos[i].super_end) ? 0 : (prim+priminfos[i].length);
539: return (Label)old_code_here;
1.50 anton 540: #else
541: return prim;
542: #endif
1.54 ! anton 543: #endif /* !defined(DOUBLY_INDIRECT) */
1.47 anton 544: }
545:
1.1 anton 546: Address loader(FILE *imagefile, char* filename)
547: /* returns the address of the image proper (after the preamble) */
548: {
549: ImageHeader header;
550: Address image;
551: Address imp; /* image+preamble */
1.17 anton 552: Char magic[8];
553: char magic7; /* size byte of magic number */
1.1 anton 554: Cell preamblesize=0;
1.6 pazsan 555: Cell data_offset = offset_image ? 56*sizeof(Cell) : 0;
1.1 anton 556: UCell check_sum;
1.15 pazsan 557: Cell ausize = ((RELINFOBITS == 8) ? 0 :
558: (RELINFOBITS == 16) ? 1 :
559: (RELINFOBITS == 32) ? 2 : 3);
560: Cell charsize = ((sizeof(Char) == 1) ? 0 :
561: (sizeof(Char) == 2) ? 1 :
562: (sizeof(Char) == 4) ? 2 : 3) + ausize;
563: Cell cellsize = ((sizeof(Cell) == 1) ? 0 :
564: (sizeof(Cell) == 2) ? 1 :
565: (sizeof(Cell) == 4) ? 2 : 3) + ausize;
1.21 anton 566: Cell sizebyte = (ausize << 5) + (charsize << 3) + (cellsize << 1) +
567: #ifdef WORDS_BIGENDIAN
568: 0
569: #else
570: 1
571: #endif
572: ;
1.1 anton 573:
1.43 anton 574: vm_prims = engine(0,0,0,0,0);
1.47 anton 575: check_prims(vm_prims);
1.1 anton 576: #ifndef DOUBLY_INDIRECT
1.43 anton 577: check_sum = checksum(vm_prims);
1.1 anton 578: #else /* defined(DOUBLY_INDIRECT) */
1.43 anton 579: check_sum = (UCell)vm_prims;
1.1 anton 580: #endif /* defined(DOUBLY_INDIRECT) */
1.10 pazsan 581:
582: do {
583: if(fread(magic,sizeof(Char),8,imagefile) < 8) {
1.15 pazsan 584: fprintf(stderr,"%s: image %s doesn't seem to be a Gforth (>=0.4) image.\n",
1.10 pazsan 585: progname, filename);
586: exit(1);
1.1 anton 587: }
1.10 pazsan 588: preamblesize+=8;
1.15 pazsan 589: } while(memcmp(magic,"Gforth2",7));
1.17 anton 590: magic7 = magic[7];
1.1 anton 591: if (debug) {
1.17 anton 592: magic[7]='\0';
1.21 anton 593: fprintf(stderr,"Magic found: %s ", magic);
594: print_sizes(magic7);
1.1 anton 595: }
596:
1.21 anton 597: if (magic7 != sizebyte)
598: {
599: fprintf(stderr,"This image is: ");
600: print_sizes(magic7);
601: fprintf(stderr,"whereas the machine is ");
602: print_sizes(sizebyte);
1.1 anton 603: exit(-2);
604: };
605:
606: fread((void *)&header,sizeof(ImageHeader),1,imagefile);
1.10 pazsan 607:
608: set_stack_sizes(&header);
1.1 anton 609:
610: #if HAVE_GETPAGESIZE
611: pagesize=getpagesize(); /* Linux/GNU libc offers this */
612: #elif HAVE_SYSCONF && defined(_SC_PAGESIZE)
613: pagesize=sysconf(_SC_PAGESIZE); /* POSIX.4 */
614: #elif PAGESIZE
615: pagesize=PAGESIZE; /* in limits.h according to Gallmeister's POSIX.4 book */
616: #endif
617: if (debug)
1.5 jwilke 618: fprintf(stderr,"pagesize=%ld\n",(unsigned long) pagesize);
1.1 anton 619:
1.34 anton 620: image = dict_alloc_read(imagefile, preamblesize+header.image_size,
621: preamblesize+dictsize, data_offset);
1.33 anton 622: imp=image+preamblesize;
1.1 anton 623: if (clear_dictionary)
1.33 anton 624: memset(imp+header.image_size, 0, dictsize-header.image_size);
1.46 jwilke 625: if(header.base==0 || header.base == 0x100) {
1.1 anton 626: Cell reloc_size=((header.image_size-1)/sizeof(Cell))/8+1;
627: char reloc_bits[reloc_size];
1.33 anton 628: fseek(imagefile, preamblesize+header.image_size, SEEK_SET);
1.10 pazsan 629: fread(reloc_bits, 1, reloc_size, imagefile);
1.45 jwilke 630: relocate((Cell *)imp, reloc_bits, header.image_size, header.base, vm_prims);
1.1 anton 631: #if 0
632: { /* let's see what the relocator did */
633: FILE *snapshot=fopen("snapshot.fi","wb");
634: fwrite(image,1,imagesize,snapshot);
635: fclose(snapshot);
636: }
637: #endif
1.46 jwilke 638: }
639: else if(header.base!=imp) {
640: fprintf(stderr,"%s: Cannot load nonrelocatable image (compiled for address $%lx) at address $%lx\n",
641: progname, (unsigned long)header.base, (unsigned long)imp);
642: exit(1);
1.1 anton 643: }
644: if (header.checksum==0)
645: ((ImageHeader *)imp)->checksum=check_sum;
646: else if (header.checksum != check_sum) {
647: fprintf(stderr,"%s: Checksum of image ($%lx) does not match the executable ($%lx)\n",
648: progname, (unsigned long)(header.checksum),(unsigned long)check_sum);
649: exit(1);
650: }
1.53 anton 651: #ifdef DOUBLY_INDIRECT
652: ((ImageHeader *)imp)->xt_base = xts;
653: #endif
1.1 anton 654: fclose(imagefile);
655:
1.10 pazsan 656: alloc_stacks((ImageHeader *)imp);
1.1 anton 657:
658: CACHE_FLUSH(imp, header.image_size);
659:
660: return imp;
661: }
662:
1.28 anton 663: /* index of last '/' or '\' in file, 0 if there is none. !! Hmm, could
664: be implemented with strrchr and the separator should be
665: OS-dependent */
1.1 anton 666: int onlypath(char *file)
1.10 pazsan 667: {
668: int i;
1.1 anton 669: i=strlen(file);
1.10 pazsan 670: while (i) {
671: if (file[i]=='\\' || file[i]=='/') break;
672: i--;
673: }
674: return i;
1.1 anton 675: }
676:
677: FILE *openimage(char *fullfilename)
1.10 pazsan 678: {
679: FILE *image_file;
1.28 anton 680: char * expfilename = tilde_cstr(fullfilename, strlen(fullfilename), 1);
1.10 pazsan 681:
1.28 anton 682: image_file=fopen(expfilename,"rb");
1.1 anton 683: if (image_file!=NULL && debug)
1.28 anton 684: fprintf(stderr, "Opened image file: %s\n", expfilename);
1.10 pazsan 685: return image_file;
1.1 anton 686: }
687:
1.28 anton 688: /* try to open image file concat(path[0:len],imagename) */
1.1 anton 689: FILE *checkimage(char *path, int len, char *imagename)
1.10 pazsan 690: {
691: int dirlen=len;
1.1 anton 692: char fullfilename[dirlen+strlen(imagename)+2];
1.10 pazsan 693:
1.1 anton 694: memcpy(fullfilename, path, dirlen);
695: if (fullfilename[dirlen-1]!='/')
696: fullfilename[dirlen++]='/';
697: strcpy(fullfilename+dirlen,imagename);
1.10 pazsan 698: return openimage(fullfilename);
1.1 anton 699: }
700:
1.10 pazsan 701: FILE * open_image_file(char * imagename, char * path)
1.1 anton 702: {
1.10 pazsan 703: FILE * image_file=NULL;
1.28 anton 704: char *origpath=path;
1.10 pazsan 705:
706: if(strchr(imagename, '/')==NULL) {
707: /* first check the directory where the exe file is in !! 01may97jaw */
708: if (onlypath(progname))
709: image_file=checkimage(progname, onlypath(progname), imagename);
710: if (!image_file)
711: do {
712: char *pend=strchr(path, PATHSEP);
713: if (pend==NULL)
714: pend=path+strlen(path);
715: if (strlen(path)==0) break;
716: image_file=checkimage(path, pend-path, imagename);
717: path=pend+(*pend==PATHSEP);
718: } while (image_file==NULL);
719: } else {
720: image_file=openimage(imagename);
721: }
1.1 anton 722:
1.10 pazsan 723: if (!image_file) {
724: fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n",
1.28 anton 725: progname, imagename, origpath);
1.10 pazsan 726: exit(1);
1.7 anton 727: }
728:
1.10 pazsan 729: return image_file;
730: }
1.11 pazsan 731: #endif
732:
733: #ifdef HAS_OS
734: UCell convsize(char *s, UCell elemsize)
735: /* converts s of the format [0-9]+[bekMGT]? (e.g. 25k) into the number
736: of bytes. the letter at the end indicates the unit, where e stands
737: for the element size. default is e */
738: {
739: char *endp;
740: UCell n,m;
741:
742: m = elemsize;
743: n = strtoul(s,&endp,0);
744: if (endp!=NULL) {
745: if (strcmp(endp,"b")==0)
746: m=1;
747: else if (strcmp(endp,"k")==0)
748: m=1024;
749: else if (strcmp(endp,"M")==0)
750: m=1024*1024;
751: else if (strcmp(endp,"G")==0)
752: m=1024*1024*1024;
753: else if (strcmp(endp,"T")==0) {
754: #if (SIZEOF_CHAR_P > 4)
1.24 anton 755: m=1024L*1024*1024*1024;
1.11 pazsan 756: #else
757: fprintf(stderr,"%s: size specification \"%s\" too large for this machine\n", progname, endp);
758: exit(1);
759: #endif
760: } else if (strcmp(endp,"e")!=0 && strcmp(endp,"")!=0) {
761: fprintf(stderr,"%s: cannot grok size specification %s: invalid unit \"%s\"\n", progname, s, endp);
762: exit(1);
763: }
764: }
765: return n*m;
766: }
1.10 pazsan 767:
768: void gforth_args(int argc, char ** argv, char ** path, char ** imagename)
769: {
770: int c;
771:
1.1 anton 772: opterr=0;
773: while (1) {
774: int option_index=0;
775: static struct option opts[] = {
1.29 anton 776: {"appl-image", required_argument, NULL, 'a'},
1.1 anton 777: {"image-file", required_argument, NULL, 'i'},
778: {"dictionary-size", required_argument, NULL, 'm'},
779: {"data-stack-size", required_argument, NULL, 'd'},
780: {"return-stack-size", required_argument, NULL, 'r'},
781: {"fp-stack-size", required_argument, NULL, 'f'},
782: {"locals-stack-size", required_argument, NULL, 'l'},
783: {"path", required_argument, NULL, 'p'},
784: {"version", no_argument, NULL, 'v'},
785: {"help", no_argument, NULL, 'h'},
786: /* put something != 0 into offset_image */
787: {"offset-image", no_argument, &offset_image, 1},
788: {"no-offset-im", no_argument, &offset_image, 0},
789: {"clear-dictionary", no_argument, &clear_dictionary, 1},
1.4 anton 790: {"die-on-signal", no_argument, &die_on_signal, 1},
1.1 anton 791: {"debug", no_argument, &debug, 1},
792: {0,0,0,0}
793: /* no-init-file, no-rc? */
794: };
795:
1.36 pazsan 796: c = getopt_long(argc, argv, "+i:m:d:r:f:l:p:vhoncsx", opts, &option_index);
1.1 anton 797:
798: switch (c) {
1.29 anton 799: case EOF: return;
800: case '?': optind--; return;
801: case 'a': *imagename = optarg; return;
1.10 pazsan 802: case 'i': *imagename = optarg; break;
1.1 anton 803: case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
804: case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
805: case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
806: case 'f': fsize = convsize(optarg,sizeof(Float)); break;
807: case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
1.10 pazsan 808: case 'p': *path = optarg; break;
1.36 pazsan 809: case 'o': offset_image = 1; break;
810: case 'n': offset_image = 0; break;
811: case 'c': clear_dictionary = 1; break;
812: case 's': die_on_signal = 1; break;
813: case 'x': debug = 1; break;
1.8 anton 814: case 'v': fprintf(stderr, "gforth %s\n", VERSION); exit(0);
1.1 anton 815: case 'h':
1.29 anton 816: fprintf(stderr, "Usage: %s [engine options] ['--'] [image arguments]\n\
1.1 anton 817: Engine Options:\n\
1.29 anton 818: --appl-image FILE equivalent to '--image-file=FILE --'\n\
1.10 pazsan 819: --clear-dictionary Initialize the dictionary with 0 bytes\n\
820: -d SIZE, --data-stack-size=SIZE Specify data stack size\n\
821: --debug Print debugging information during startup\n\
822: --die-on-signal exit instead of CATCHing some signals\n\
823: -f SIZE, --fp-stack-size=SIZE Specify floating point stack size\n\
824: -h, --help Print this message and exit\n\
825: -i FILE, --image-file=FILE Use image FILE instead of `gforth.fi'\n\
826: -l SIZE, --locals-stack-size=SIZE Specify locals stack size\n\
827: -m SIZE, --dictionary-size=SIZE Specify Forth dictionary size\n\
828: --no-offset-im Load image at normal position\n\
829: --offset-image Load image at a different position\n\
830: -p PATH, --path=PATH Search path for finding image and sources\n\
831: -r SIZE, --return-stack-size=SIZE Specify return stack size\n\
832: -v, --version Print version and exit\n\
1.1 anton 833: SIZE arguments consist of an integer followed by a unit. The unit can be\n\
1.10 pazsan 834: `b' (byte), `e' (element; default), `k' (KB), `M' (MB), `G' (GB) or `T' (TB).\n",
835: argv[0]);
836: optind--;
837: return;
1.1 anton 838: }
839: }
1.10 pazsan 840: }
1.11 pazsan 841: #endif
1.10 pazsan 842:
843: #ifdef INCLUDE_IMAGE
844: extern Cell image[];
845: extern const char reloc_bits[];
846: #endif
847:
848: int main(int argc, char **argv, char **env)
849: {
1.30 pazsan 850: #ifdef HAS_OS
1.10 pazsan 851: char *path = getenv("GFORTHPATH") ? : DEFAULTPATH;
1.30 pazsan 852: #else
853: char *path = DEFAULTPATH;
854: #endif
1.13 pazsan 855: #ifndef INCLUDE_IMAGE
1.10 pazsan 856: char *imagename="gforth.fi";
857: FILE *image_file;
858: Address image;
859: #endif
860: int retvalue;
861:
862: #if defined(i386) && defined(ALIGNMENT_CHECK) && !defined(DIRECT_THREADED)
863: /* turn on alignment checks on the 486.
864: * on the 386 this should have no effect. */
865: __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
866: /* this is unusable with Linux' libc.4.6.27, because this library is
867: not alignment-clean; we would have to replace some library
868: functions (e.g., memcpy) to make it work. Also GCC doesn't try to keep
869: the stack FP-aligned. */
870: #endif
871:
872: /* buffering of the user output device */
1.11 pazsan 873: #ifdef _IONBF
1.10 pazsan 874: if (isatty(fileno(stdout))) {
875: fflush(stdout);
876: setvbuf(stdout,NULL,_IONBF,0);
1.1 anton 877: }
1.11 pazsan 878: #endif
1.1 anton 879:
1.10 pazsan 880: progname = argv[0];
881:
1.11 pazsan 882: #ifdef HAS_OS
1.10 pazsan 883: gforth_args(argc, argv, &path, &imagename);
1.11 pazsan 884: #endif
1.10 pazsan 885:
886: #ifdef INCLUDE_IMAGE
887: set_stack_sizes((ImageHeader *)image);
1.22 pazsan 888: if(((ImageHeader *)image)->base != image)
889: relocate(image, reloc_bits, ((ImageHeader *)image)->image_size,
890: (Label*)engine(0, 0, 0, 0, 0));
1.10 pazsan 891: alloc_stacks((ImageHeader *)image);
892: #else
893: image_file = open_image_file(imagename, path);
894: image = loader(image_file, imagename);
895: #endif
1.24 anton 896: gforth_header=(ImageHeader *)image; /* used in SIGSEGV handler */
1.1 anton 897:
898: {
1.10 pazsan 899: char path2[strlen(path)+1];
1.1 anton 900: char *p1, *p2;
901: Cell environ[]= {
902: (Cell)argc-(optind-1),
903: (Cell)(argv+(optind-1)),
1.10 pazsan 904: (Cell)strlen(path),
1.1 anton 905: (Cell)path2};
906: argv[optind-1] = progname;
907: /*
908: for (i=0; i<environ[0]; i++)
909: printf("%s\n", ((char **)(environ[1]))[i]);
910: */
911: /* make path OS-independent by replacing path separators with NUL */
1.10 pazsan 912: for (p1=path, p2=path2; *p1!='\0'; p1++, p2++)
1.1 anton 913: if (*p1==PATHSEP)
914: *p2 = '\0';
915: else
916: *p2 = *p1;
917: *p2='\0';
1.10 pazsan 918: retvalue = go_forth(image, 4, environ);
1.42 anton 919: #ifdef VM_PROFILING
920: vm_print_profile(stderr);
921: #endif
1.1 anton 922: deprep_terminal();
923: }
1.13 pazsan 924: return retvalue;
1.1 anton 925: }
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