Annotation of gforth/engine/main.c, revision 1.55
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 _n = (n); ((Cell)(((_n & 0x4000) ? symbols : xts)+(_n&~0x4000UL)));})
1.1 anton 65: #else
1.53 anton 66: # define CA(n) ((Cell)(symbols+((n)&~0x4000UL)))
1.1 anton 67: #endif
68:
69: #define maxaligned(n) (typeof(n))((((Cell)n)+sizeof(Float)-1)&-sizeof(Float))
70:
71: static UCell dictsize=0;
72: static UCell dsize=0;
73: static UCell rsize=0;
74: static UCell fsize=0;
75: static UCell lsize=0;
76: int offset_image=0;
1.4 anton 77: int die_on_signal=0;
1.13 pazsan 78: #ifndef INCLUDE_IMAGE
1.1 anton 79: static int clear_dictionary=0;
1.24 anton 80: UCell pagesize=1;
1.22 pazsan 81: char *progname;
82: #else
83: char *progname = "gforth";
84: int optind = 1;
1.13 pazsan 85: #endif
1.31 pazsan 86:
1.48 anton 87: Address code_area=0;
88: Address code_here=0; /* does for code-area what HERE does for the dictionary */
89:
1.30 pazsan 90: #ifdef HAS_DEBUG
1.1 anton 91: static int debug=0;
1.31 pazsan 92: #else
93: # define debug 0
94: # define perror(x...)
95: # define fprintf(x...)
1.30 pazsan 96: #endif
1.31 pazsan 97:
1.24 anton 98: ImageHeader *gforth_header;
1.43 anton 99: Label *vm_prims;
1.53 anton 100: #ifdef DOUBLY_INDIRECT
101: Label *xts; /* same content as vm_prims, but should only be used for xts */
102: #endif
1.1 anton 103:
1.30 pazsan 104: #ifdef MEMCMP_AS_SUBROUTINE
105: int gforth_memcmp(const char * s1, const char * s2, size_t n)
106: {
107: return memcmp(s1, s2, n);
108: }
109: #endif
110:
1.1 anton 111: /* image file format:
1.15 pazsan 112: * "#! binary-path -i\n" (e.g., "#! /usr/local/bin/gforth-0.4.0 -i\n")
1.1 anton 113: * padding to a multiple of 8
1.15 pazsan 114: * magic: "Gforth2x" means format 0.4,
115: * where x is a byte with
116: * bit 7: reserved = 0
117: * bit 6:5: address unit size 2^n octets
118: * bit 4:3: character size 2^n octets
119: * bit 2:1: cell size 2^n octets
120: * bit 0: endian, big=0, little=1.
121: * The magic are always 8 octets, no matter what the native AU/character size is
1.1 anton 122: * padding to max alignment (no padding necessary on current machines)
1.24 anton 123: * ImageHeader structure (see forth.h)
1.1 anton 124: * data (size in ImageHeader.image_size)
125: * tags ((if relocatable, 1 bit/data cell)
126: *
127: * tag==1 means that the corresponding word is an address;
128: * If the word is >=0, the address is within the image;
129: * addresses within the image are given relative to the start of the image.
130: * If the word =-1 (CF_NIL), the address is NIL,
131: * If the word is <CF_NIL and >CF(DODOES), it's a CFA (:, Create, ...)
132: * If the word =CF(DODOES), it's a DOES> CFA
133: * If the word =CF(DOESJUMP), it's a DOES JUMP (2 Cells after DOES>,
134: * possibly containing a jump to dodoes)
1.51 anton 135: * If the word is <CF(DOESJUMP) and bit 14 is set, it's the xt of a primitive
136: * If the word is <CF(DOESJUMP) and bit 14 is clear,
137: * it's the threaded code of a primitive
1.1 anton 138: */
139:
1.46 jwilke 140: void relocate(Cell *image, const char *bitstring,
141: int size, int base, Label symbols[])
1.1 anton 142: {
1.16 pazsan 143: int i=0, j, k, steps=(size/sizeof(Cell))/RELINFOBITS;
1.11 pazsan 144: Cell token;
1.1 anton 145: char bits;
1.37 anton 146: Cell max_symbols;
1.46 jwilke 147: /*
148: * A virtial start address that's the real start address minus
149: * the one in the image
150: */
1.45 jwilke 151: Cell *start = (Cell * ) (((void *) image) - ((void *) base));
1.1 anton 152:
1.46 jwilke 153:
154: /* printf("relocating to %x[%x] start=%x base=%x\n", image, size, start, base); */
1.37 anton 155:
156: for (max_symbols=DOESJUMP+1; symbols[max_symbols]!=0; max_symbols++)
157: ;
1.47 anton 158: max_symbols--;
1.35 pazsan 159: size/=sizeof(Cell);
160:
1.31 pazsan 161: for(k=0; k<=steps; k++) {
1.13 pazsan 162: for(j=0, bits=bitstring[k]; j<RELINFOBITS; j++, i++, bits<<=1) {
1.1 anton 163: /* fprintf(stderr,"relocate: image[%d]\n", i);*/
1.35 pazsan 164: if((i < size) && (bits & (1U << (RELINFOBITS-1)))) {
165: /* fprintf(stderr,"relocate: image[%d]=%d of %d\n", i, image[i], size/sizeof(Cell)); */
1.45 jwilke 166: token=image[i];
167: if(token<0)
1.55 ! anton 168: switch(token|0x4000)
1.1 anton 169: {
170: case CF_NIL : image[i]=0; break;
171: #if !defined(DOUBLY_INDIRECT)
172: case CF(DOCOL) :
173: case CF(DOVAR) :
174: case CF(DOCON) :
175: case CF(DOUSER) :
176: case CF(DODEFER) :
1.11 pazsan 177: case CF(DOFIELD) : MAKE_CF(image+i,symbols[CF(token)]); break;
1.1 anton 178: case CF(DOESJUMP): MAKE_DOES_HANDLER(image+i); break;
179: #endif /* !defined(DOUBLY_INDIRECT) */
180: case CF(DODOES) :
1.45 jwilke 181: MAKE_DOES_CF(image+i,(Xt *)(image[i+1]+((Cell)start)));
1.1 anton 182: break;
183: default :
184: /* printf("Code field generation image[%x]:=CA(%x)\n",
185: i, CF(image[i])); */
1.55 ! anton 186: if (CF((token | 0x4000))<max_symbols) {
1.37 anton 187: image[i]=(Cell)CA(CF(token));
1.55 ! anton 188: } else
1.37 anton 189: fprintf(stderr,"Primitive %d used in this image at $%lx is not implemented by this\n engine (%s); executing this code will crash.\n",CF(token),(long)&image[i],VERSION);
1.1 anton 190: }
1.46 jwilke 191: else {
1.45 jwilke 192: // if base is > 0: 0 is a null reference so don't adjust
193: if (token>=base) {
194: image[i]+=(Cell)start;
195: }
1.46 jwilke 196: }
1.1 anton 197: }
198: }
1.31 pazsan 199: }
1.26 jwilke 200: ((ImageHeader*)(image))->base = (Address) image;
1.1 anton 201: }
202:
203: UCell checksum(Label symbols[])
204: {
205: UCell r=PRIM_VERSION;
206: Cell i;
207:
208: for (i=DOCOL; i<=DOESJUMP; i++) {
209: r ^= (UCell)(symbols[i]);
210: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
211: }
212: #ifdef DIRECT_THREADED
213: /* we have to consider all the primitives */
214: for (; symbols[i]!=(Label)0; i++) {
215: r ^= (UCell)(symbols[i]);
216: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
217: }
218: #else
219: /* in indirect threaded code all primitives are accessed through the
220: symbols table, so we just have to put the base address of symbols
221: in the checksum */
222: r ^= (UCell)symbols;
223: #endif
224: return r;
225: }
226:
1.3 anton 227: Address verbose_malloc(Cell size)
228: {
229: Address r;
230: /* leave a little room (64B) for stack underflows */
231: if ((r = malloc(size+64))==NULL) {
232: perror(progname);
233: exit(1);
234: }
235: r = (Address)((((Cell)r)+(sizeof(Float)-1))&(-sizeof(Float)));
236: if (debug)
237: fprintf(stderr, "malloc succeeds, address=$%lx\n", (long)r);
238: return r;
239: }
240:
1.33 anton 241: static Address next_address=0;
242: void after_alloc(Address r, Cell size)
243: {
244: if (r != (Address)-1) {
245: if (debug)
246: fprintf(stderr, "success, address=$%lx\n", (long) r);
247: if (pagesize != 1)
248: next_address = (Address)(((((Cell)r)+size-1)&-pagesize)+2*pagesize); /* leave one page unmapped */
249: } else {
250: if (debug)
251: fprintf(stderr, "failed: %s\n", strerror(errno));
252: }
253: }
254:
1.34 anton 255: #ifndef MAP_FAILED
256: #define MAP_FAILED ((Address) -1)
257: #endif
258: #ifndef MAP_FILE
259: # define MAP_FILE 0
260: #endif
261: #ifndef MAP_PRIVATE
262: # define MAP_PRIVATE 0
263: #endif
264:
265: #if defined(HAVE_MMAP)
266: static Address alloc_mmap(Cell size)
1.1 anton 267: {
268: Address r;
269:
270: #if defined(MAP_ANON)
271: if (debug)
272: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_ANON, ...); ", (long)next_address, (long)size);
1.34 anton 273: r = mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
1.1 anton 274: #else /* !defined(MAP_ANON) */
1.17 anton 275: /* Ultrix (at least) does not define MAP_FILE and MAP_PRIVATE (both are
276: apparently defaults) */
1.1 anton 277: static int dev_zero=-1;
278:
279: if (dev_zero == -1)
280: dev_zero = open("/dev/zero", O_RDONLY);
281: if (dev_zero == -1) {
1.34 anton 282: r = MAP_FAILED;
1.1 anton 283: if (debug)
284: fprintf(stderr, "open(\"/dev/zero\"...) failed (%s), no mmap; ",
285: strerror(errno));
286: } else {
287: if (debug)
288: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FILE, dev_zero, ...); ", (long)next_address, (long)size);
289: r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FILE|MAP_PRIVATE, dev_zero, 0);
290: }
291: #endif /* !defined(MAP_ANON) */
1.34 anton 292: after_alloc(r, size);
293: return r;
294: }
295: #endif
296:
297: Address my_alloc(Cell size)
298: {
299: #if HAVE_MMAP
300: Address r;
301:
302: r=alloc_mmap(size);
303: if (r!=MAP_FAILED)
1.1 anton 304: return r;
305: #endif /* HAVE_MMAP */
1.3 anton 306: /* use malloc as fallback */
307: return verbose_malloc(size);
1.1 anton 308: }
309:
1.3 anton 310: #if (defined(mips) && !defined(INDIRECT_THREADED))
311: /* the 256MB jump restriction on the MIPS architecture makes the
312: combination of direct threading and mmap unsafe. */
1.33 anton 313: #define mips_dict_alloc 1
1.3 anton 314: #define dict_alloc(size) verbose_malloc(size)
315: #else
316: #define dict_alloc(size) my_alloc(size)
317: #endif
318:
1.34 anton 319: Address dict_alloc_read(FILE *file, Cell imagesize, Cell dictsize, Cell offset)
1.33 anton 320: {
1.34 anton 321: Address image = MAP_FAILED;
1.33 anton 322:
1.34 anton 323: #if defined(HAVE_MMAP) && !defined(mips_dict_alloc)
1.33 anton 324: if (offset==0) {
1.34 anton 325: image=alloc_mmap(dictsize);
1.33 anton 326: if (debug)
1.34 anton 327: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FIXED|MAP_FILE, imagefile, 0); ", (long)image, (long)imagesize);
328: image = mmap(image, imagesize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FIXED|MAP_FILE|MAP_PRIVATE, fileno(file), 0);
329: after_alloc(image,dictsize);
1.33 anton 330: }
1.34 anton 331: #endif /* defined(MAP_ANON) && !defined(mips_dict_alloc) */
332: if (image == MAP_FAILED) {
333: image = dict_alloc(dictsize+offset)+offset;
1.33 anton 334: rewind(file); /* fseek(imagefile,0L,SEEK_SET); */
1.34 anton 335: fread(image, 1, imagesize, file);
1.33 anton 336: }
337: return image;
338: }
339:
1.10 pazsan 340: void set_stack_sizes(ImageHeader * header)
341: {
342: if (dictsize==0)
343: dictsize = header->dict_size;
344: if (dsize==0)
345: dsize = header->data_stack_size;
346: if (rsize==0)
347: rsize = header->return_stack_size;
348: if (fsize==0)
349: fsize = header->fp_stack_size;
350: if (lsize==0)
351: lsize = header->locals_stack_size;
352: dictsize=maxaligned(dictsize);
353: dsize=maxaligned(dsize);
354: rsize=maxaligned(rsize);
355: lsize=maxaligned(lsize);
356: fsize=maxaligned(fsize);
357: }
358:
359: void alloc_stacks(ImageHeader * header)
360: {
361: header->dict_size=dictsize;
362: header->data_stack_size=dsize;
363: header->fp_stack_size=fsize;
364: header->return_stack_size=rsize;
365: header->locals_stack_size=lsize;
366:
367: header->data_stack_base=my_alloc(dsize);
368: header->fp_stack_base=my_alloc(fsize);
369: header->return_stack_base=my_alloc(rsize);
370: header->locals_stack_base=my_alloc(lsize);
1.48 anton 371: code_here = code_area = my_alloc(dictsize);
1.10 pazsan 372: }
373:
1.44 pazsan 374: #warning You can ignore the warnings about clobbered variables in go_forth
1.11 pazsan 375: int go_forth(Address image, int stack, Cell *entries)
376: {
1.38 anton 377: volatile ImageHeader *image_header = (ImageHeader *)image;
1.18 anton 378: Cell *sp0=(Cell*)(image_header->data_stack_base + dsize);
1.44 pazsan 379: Cell *rp0=(Cell *)(image_header->return_stack_base + rsize);
1.18 anton 380: Float *fp0=(Float *)(image_header->fp_stack_base + fsize);
1.44 pazsan 381: #ifdef GFORTH_DEBUGGING
1.38 anton 382: volatile Cell *orig_rp0=rp0;
1.44 pazsan 383: #endif
1.18 anton 384: Address lp0=image_header->locals_stack_base + lsize;
385: Xt *ip0=(Xt *)(image_header->boot_entry);
1.13 pazsan 386: #ifdef SYSSIGNALS
1.11 pazsan 387: int throw_code;
1.13 pazsan 388: #endif
1.11 pazsan 389:
390: /* ensure that the cached elements (if any) are accessible */
1.41 anton 391: IF_spTOS(sp0--);
392: IF_fpTOS(fp0--);
1.11 pazsan 393:
394: for(;stack>0;stack--)
1.18 anton 395: *--sp0=entries[stack-1];
1.11 pazsan 396:
1.30 pazsan 397: #ifdef SYSSIGNALS
1.11 pazsan 398: get_winsize();
399:
400: install_signal_handlers(); /* right place? */
401:
402: if ((throw_code=setjmp(throw_jmp_buf))) {
403: static Cell signal_data_stack[8];
404: static Cell signal_return_stack[8];
405: static Float signal_fp_stack[1];
1.13 pazsan 406:
1.11 pazsan 407: signal_data_stack[7]=throw_code;
1.18 anton 408:
409: #ifdef GFORTH_DEBUGGING
1.38 anton 410: /* fprintf(stderr,"\nrp=%ld\n",(long)rp); */
411: if (rp <= orig_rp0 && rp > (Cell *)(image_header->return_stack_base+5)) {
1.18 anton 412: /* no rstack overflow or underflow */
413: rp0 = rp;
1.27 anton 414: *--rp0 = (Cell)ip;
1.18 anton 415: }
416: else /* I love non-syntactic ifdefs :-) */
417: #endif
418: rp0 = signal_return_stack+8;
1.25 anton 419: /* fprintf(stderr, "rp=$%x\n",rp0);*/
1.11 pazsan 420:
1.33 anton 421: return((int)(Cell)engine(image_header->throw_entry, signal_data_stack+7,
1.18 anton 422: rp0, signal_fp_stack, 0));
1.11 pazsan 423: }
1.13 pazsan 424: #endif
1.11 pazsan 425:
1.33 anton 426: return((int)(Cell)engine(ip0,sp0,rp0,fp0,lp0));
1.11 pazsan 427: }
428:
1.21 anton 429:
1.30 pazsan 430: #ifndef INCLUDE_IMAGE
1.21 anton 431: void print_sizes(Cell sizebyte)
432: /* print size information */
433: {
434: static char* endianstring[]= { " big","little" };
435:
436: fprintf(stderr,"%s endian, cell=%d bytes, char=%d bytes, au=%d bytes\n",
437: endianstring[sizebyte & 1],
438: 1 << ((sizebyte >> 1) & 3),
439: 1 << ((sizebyte >> 3) & 3),
440: 1 << ((sizebyte >> 5) & 3));
441: }
442:
1.47 anton 443: typedef struct {
444: Label start;
445: Cell length; /* excluding the jump */
446: char super_end; /* true if primitive ends superinstruction, i.e.,
447: unconditional branch, execute, etc. */
448: } PrimInfo;
449:
450: PrimInfo *priminfos;
1.48 anton 451: Cell npriminfos=0;
1.47 anton 452:
453: void check_prims(Label symbols1[])
454: {
455: int i;
1.55 ! anton 456: Label *symbols2;
1.49 anton 457: static char superend[]={
1.48 anton 458: #include "prim_superend.i"
459: };
1.47 anton 460:
461: for (i=DOESJUMP+1; symbols1[i+1]!=0; i++)
462: ;
1.55 ! anton 463: npriminfos = i;
! 464:
! 465: #if defined(IS_NEXT_JUMP) && !defined(DOUBLY_INDIRECT)
! 466: symbols2=engine2(0,0,0,0,0);
1.47 anton 467: priminfos = calloc(i,sizeof(PrimInfo));
468: for (i=DOESJUMP+1; symbols1[i+1]!=0; i++) {
469: int prim_len=symbols1[i+1]-symbols1[i];
470: PrimInfo *pi=&priminfos[i];
471: int j;
1.48 anton 472: pi->super_end = superend[i-DOESJUMP-1];
1.50 anton 473: for (j=prim_len-IND_JUMP_LENGTH; ; j--) {
474: if (IS_NEXT_JUMP(symbols1[i]+j)) {
1.47 anton 475: prim_len = j;
1.48 anton 476: if (pi->super_end)
1.50 anton 477: prim_len += IND_JUMP_LENGTH; /* include the jump */
1.47 anton 478: break;
479: }
480: if (j==0) { /* NEXT jump not found, e.g., execute */
1.48 anton 481: if (!pi->super_end && debug)
482: fprintf(stderr, "NEXT jump not found for primitive %d, making it super_end\n", i);
483: pi->super_end = 1;
1.47 anton 484: break;
485: }
486: }
487: /* fprintf(stderr,"checking primitive %d: memcmp(%p, %p, %d)\n",
488: i, symbols1[i], symbols2[i], prim_len);*/
489: if (memcmp(symbols1[i],symbols2[i],prim_len)!=0) {
490: if (debug)
491: fprintf(stderr,"Primitive %d not relocatable: memcmp(%p, %p, %d)\n",
492: i, symbols1[i], symbols2[i], prim_len);
493: } else {
494: pi->start = symbols1[i];
495: pi->length = prim_len;
496: if (debug)
497: fprintf(stderr,"Primitive %d relocatable: start %p, length %ld, super_end %d\n",
498: i, pi->start, pi->length, pi->super_end);
499: }
1.48 anton 500: }
501: #endif
502: }
503:
504: Label compile_prim(Label prim)
505: {
1.54 anton 506: #ifdef DOUBLY_INDIRECT
507: if (prim<((Label)(xts+DOESJUMP)) || prim>((Label)(xts+npriminfos))) {
508: fprintf(stderr,"compile_prim encountered xt %p\n", prim);
509: return prim;
510: } else
511: return prim-((Label)xts)+((Label)vm_prims);
512: #else /* !defined(DOUBLY_INDIRECT) */
1.50 anton 513: #ifdef IND_JUMP_LENGTH
1.48 anton 514: int i;
515: Address old_code_here=code_here;
516: static Address last_jump=0;
517:
518: for (i=0; ; i++) {
519: if (i>=npriminfos) { /* not a relocatable prim */
520: if (last_jump) { /* make sure the last sequence is complete */
1.50 anton 521: memcpy(code_here, last_jump, IND_JUMP_LENGTH);
522: code_here += IND_JUMP_LENGTH;
1.48 anton 523: last_jump = 0;
524: }
525: return prim;
526: }
527: if (priminfos[i].start==prim)
528: break;
1.47 anton 529: }
1.50 anton 530: #ifdef ALIGN_CODE
531: ALIGN_CODE;
532: #endif
1.48 anton 533: memcpy(code_here, (Address)prim, priminfos[i].length);
534: code_here += priminfos[i].length;
535: last_jump = (priminfos[i].super_end) ? 0 : (prim+priminfos[i].length);
536: return (Label)old_code_here;
1.50 anton 537: #else
538: return prim;
539: #endif
1.54 anton 540: #endif /* !defined(DOUBLY_INDIRECT) */
1.47 anton 541: }
542:
1.1 anton 543: Address loader(FILE *imagefile, char* filename)
544: /* returns the address of the image proper (after the preamble) */
545: {
546: ImageHeader header;
547: Address image;
548: Address imp; /* image+preamble */
1.17 anton 549: Char magic[8];
550: char magic7; /* size byte of magic number */
1.1 anton 551: Cell preamblesize=0;
1.6 pazsan 552: Cell data_offset = offset_image ? 56*sizeof(Cell) : 0;
1.1 anton 553: UCell check_sum;
1.15 pazsan 554: Cell ausize = ((RELINFOBITS == 8) ? 0 :
555: (RELINFOBITS == 16) ? 1 :
556: (RELINFOBITS == 32) ? 2 : 3);
557: Cell charsize = ((sizeof(Char) == 1) ? 0 :
558: (sizeof(Char) == 2) ? 1 :
559: (sizeof(Char) == 4) ? 2 : 3) + ausize;
560: Cell cellsize = ((sizeof(Cell) == 1) ? 0 :
561: (sizeof(Cell) == 2) ? 1 :
562: (sizeof(Cell) == 4) ? 2 : 3) + ausize;
1.21 anton 563: Cell sizebyte = (ausize << 5) + (charsize << 3) + (cellsize << 1) +
564: #ifdef WORDS_BIGENDIAN
565: 0
566: #else
567: 1
568: #endif
569: ;
1.1 anton 570:
1.43 anton 571: vm_prims = engine(0,0,0,0,0);
1.47 anton 572: check_prims(vm_prims);
1.1 anton 573: #ifndef DOUBLY_INDIRECT
1.43 anton 574: check_sum = checksum(vm_prims);
1.1 anton 575: #else /* defined(DOUBLY_INDIRECT) */
1.43 anton 576: check_sum = (UCell)vm_prims;
1.1 anton 577: #endif /* defined(DOUBLY_INDIRECT) */
1.10 pazsan 578:
579: do {
580: if(fread(magic,sizeof(Char),8,imagefile) < 8) {
1.15 pazsan 581: fprintf(stderr,"%s: image %s doesn't seem to be a Gforth (>=0.4) image.\n",
1.10 pazsan 582: progname, filename);
583: exit(1);
1.1 anton 584: }
1.10 pazsan 585: preamblesize+=8;
1.15 pazsan 586: } while(memcmp(magic,"Gforth2",7));
1.17 anton 587: magic7 = magic[7];
1.1 anton 588: if (debug) {
1.17 anton 589: magic[7]='\0';
1.21 anton 590: fprintf(stderr,"Magic found: %s ", magic);
591: print_sizes(magic7);
1.1 anton 592: }
593:
1.21 anton 594: if (magic7 != sizebyte)
595: {
596: fprintf(stderr,"This image is: ");
597: print_sizes(magic7);
598: fprintf(stderr,"whereas the machine is ");
599: print_sizes(sizebyte);
1.1 anton 600: exit(-2);
601: };
602:
603: fread((void *)&header,sizeof(ImageHeader),1,imagefile);
1.10 pazsan 604:
605: set_stack_sizes(&header);
1.1 anton 606:
607: #if HAVE_GETPAGESIZE
608: pagesize=getpagesize(); /* Linux/GNU libc offers this */
609: #elif HAVE_SYSCONF && defined(_SC_PAGESIZE)
610: pagesize=sysconf(_SC_PAGESIZE); /* POSIX.4 */
611: #elif PAGESIZE
612: pagesize=PAGESIZE; /* in limits.h according to Gallmeister's POSIX.4 book */
613: #endif
614: if (debug)
1.5 jwilke 615: fprintf(stderr,"pagesize=%ld\n",(unsigned long) pagesize);
1.1 anton 616:
1.34 anton 617: image = dict_alloc_read(imagefile, preamblesize+header.image_size,
618: preamblesize+dictsize, data_offset);
1.33 anton 619: imp=image+preamblesize;
1.1 anton 620: if (clear_dictionary)
1.33 anton 621: memset(imp+header.image_size, 0, dictsize-header.image_size);
1.46 jwilke 622: if(header.base==0 || header.base == 0x100) {
1.1 anton 623: Cell reloc_size=((header.image_size-1)/sizeof(Cell))/8+1;
624: char reloc_bits[reloc_size];
1.33 anton 625: fseek(imagefile, preamblesize+header.image_size, SEEK_SET);
1.10 pazsan 626: fread(reloc_bits, 1, reloc_size, imagefile);
1.45 jwilke 627: relocate((Cell *)imp, reloc_bits, header.image_size, header.base, vm_prims);
1.1 anton 628: #if 0
629: { /* let's see what the relocator did */
630: FILE *snapshot=fopen("snapshot.fi","wb");
631: fwrite(image,1,imagesize,snapshot);
632: fclose(snapshot);
633: }
634: #endif
1.46 jwilke 635: }
636: else if(header.base!=imp) {
637: fprintf(stderr,"%s: Cannot load nonrelocatable image (compiled for address $%lx) at address $%lx\n",
638: progname, (unsigned long)header.base, (unsigned long)imp);
639: exit(1);
1.1 anton 640: }
641: if (header.checksum==0)
642: ((ImageHeader *)imp)->checksum=check_sum;
643: else if (header.checksum != check_sum) {
644: fprintf(stderr,"%s: Checksum of image ($%lx) does not match the executable ($%lx)\n",
645: progname, (unsigned long)(header.checksum),(unsigned long)check_sum);
646: exit(1);
647: }
1.53 anton 648: #ifdef DOUBLY_INDIRECT
649: ((ImageHeader *)imp)->xt_base = xts;
650: #endif
1.1 anton 651: fclose(imagefile);
652:
1.10 pazsan 653: alloc_stacks((ImageHeader *)imp);
1.1 anton 654:
655: CACHE_FLUSH(imp, header.image_size);
656:
657: return imp;
658: }
659:
1.28 anton 660: /* index of last '/' or '\' in file, 0 if there is none. !! Hmm, could
661: be implemented with strrchr and the separator should be
662: OS-dependent */
1.1 anton 663: int onlypath(char *file)
1.10 pazsan 664: {
665: int i;
1.1 anton 666: i=strlen(file);
1.10 pazsan 667: while (i) {
668: if (file[i]=='\\' || file[i]=='/') break;
669: i--;
670: }
671: return i;
1.1 anton 672: }
673:
674: FILE *openimage(char *fullfilename)
1.10 pazsan 675: {
676: FILE *image_file;
1.28 anton 677: char * expfilename = tilde_cstr(fullfilename, strlen(fullfilename), 1);
1.10 pazsan 678:
1.28 anton 679: image_file=fopen(expfilename,"rb");
1.1 anton 680: if (image_file!=NULL && debug)
1.28 anton 681: fprintf(stderr, "Opened image file: %s\n", expfilename);
1.10 pazsan 682: return image_file;
1.1 anton 683: }
684:
1.28 anton 685: /* try to open image file concat(path[0:len],imagename) */
1.1 anton 686: FILE *checkimage(char *path, int len, char *imagename)
1.10 pazsan 687: {
688: int dirlen=len;
1.1 anton 689: char fullfilename[dirlen+strlen(imagename)+2];
1.10 pazsan 690:
1.1 anton 691: memcpy(fullfilename, path, dirlen);
692: if (fullfilename[dirlen-1]!='/')
693: fullfilename[dirlen++]='/';
694: strcpy(fullfilename+dirlen,imagename);
1.10 pazsan 695: return openimage(fullfilename);
1.1 anton 696: }
697:
1.10 pazsan 698: FILE * open_image_file(char * imagename, char * path)
1.1 anton 699: {
1.10 pazsan 700: FILE * image_file=NULL;
1.28 anton 701: char *origpath=path;
1.10 pazsan 702:
703: if(strchr(imagename, '/')==NULL) {
704: /* first check the directory where the exe file is in !! 01may97jaw */
705: if (onlypath(progname))
706: image_file=checkimage(progname, onlypath(progname), imagename);
707: if (!image_file)
708: do {
709: char *pend=strchr(path, PATHSEP);
710: if (pend==NULL)
711: pend=path+strlen(path);
712: if (strlen(path)==0) break;
713: image_file=checkimage(path, pend-path, imagename);
714: path=pend+(*pend==PATHSEP);
715: } while (image_file==NULL);
716: } else {
717: image_file=openimage(imagename);
718: }
1.1 anton 719:
1.10 pazsan 720: if (!image_file) {
721: fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n",
1.28 anton 722: progname, imagename, origpath);
1.10 pazsan 723: exit(1);
1.7 anton 724: }
725:
1.10 pazsan 726: return image_file;
727: }
1.11 pazsan 728: #endif
729:
730: #ifdef HAS_OS
731: UCell convsize(char *s, UCell elemsize)
732: /* converts s of the format [0-9]+[bekMGT]? (e.g. 25k) into the number
733: of bytes. the letter at the end indicates the unit, where e stands
734: for the element size. default is e */
735: {
736: char *endp;
737: UCell n,m;
738:
739: m = elemsize;
740: n = strtoul(s,&endp,0);
741: if (endp!=NULL) {
742: if (strcmp(endp,"b")==0)
743: m=1;
744: else if (strcmp(endp,"k")==0)
745: m=1024;
746: else if (strcmp(endp,"M")==0)
747: m=1024*1024;
748: else if (strcmp(endp,"G")==0)
749: m=1024*1024*1024;
750: else if (strcmp(endp,"T")==0) {
751: #if (SIZEOF_CHAR_P > 4)
1.24 anton 752: m=1024L*1024*1024*1024;
1.11 pazsan 753: #else
754: fprintf(stderr,"%s: size specification \"%s\" too large for this machine\n", progname, endp);
755: exit(1);
756: #endif
757: } else if (strcmp(endp,"e")!=0 && strcmp(endp,"")!=0) {
758: fprintf(stderr,"%s: cannot grok size specification %s: invalid unit \"%s\"\n", progname, s, endp);
759: exit(1);
760: }
761: }
762: return n*m;
763: }
1.10 pazsan 764:
765: void gforth_args(int argc, char ** argv, char ** path, char ** imagename)
766: {
767: int c;
768:
1.1 anton 769: opterr=0;
770: while (1) {
771: int option_index=0;
772: static struct option opts[] = {
1.29 anton 773: {"appl-image", required_argument, NULL, 'a'},
1.1 anton 774: {"image-file", required_argument, NULL, 'i'},
775: {"dictionary-size", required_argument, NULL, 'm'},
776: {"data-stack-size", required_argument, NULL, 'd'},
777: {"return-stack-size", required_argument, NULL, 'r'},
778: {"fp-stack-size", required_argument, NULL, 'f'},
779: {"locals-stack-size", required_argument, NULL, 'l'},
780: {"path", required_argument, NULL, 'p'},
781: {"version", no_argument, NULL, 'v'},
782: {"help", no_argument, NULL, 'h'},
783: /* put something != 0 into offset_image */
784: {"offset-image", no_argument, &offset_image, 1},
785: {"no-offset-im", no_argument, &offset_image, 0},
786: {"clear-dictionary", no_argument, &clear_dictionary, 1},
1.4 anton 787: {"die-on-signal", no_argument, &die_on_signal, 1},
1.1 anton 788: {"debug", no_argument, &debug, 1},
789: {0,0,0,0}
790: /* no-init-file, no-rc? */
791: };
792:
1.36 pazsan 793: c = getopt_long(argc, argv, "+i:m:d:r:f:l:p:vhoncsx", opts, &option_index);
1.1 anton 794:
795: switch (c) {
1.29 anton 796: case EOF: return;
797: case '?': optind--; return;
798: case 'a': *imagename = optarg; return;
1.10 pazsan 799: case 'i': *imagename = optarg; break;
1.1 anton 800: case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
801: case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
802: case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
803: case 'f': fsize = convsize(optarg,sizeof(Float)); break;
804: case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
1.10 pazsan 805: case 'p': *path = optarg; break;
1.36 pazsan 806: case 'o': offset_image = 1; break;
807: case 'n': offset_image = 0; break;
808: case 'c': clear_dictionary = 1; break;
809: case 's': die_on_signal = 1; break;
810: case 'x': debug = 1; break;
1.8 anton 811: case 'v': fprintf(stderr, "gforth %s\n", VERSION); exit(0);
1.1 anton 812: case 'h':
1.29 anton 813: fprintf(stderr, "Usage: %s [engine options] ['--'] [image arguments]\n\
1.1 anton 814: Engine Options:\n\
1.29 anton 815: --appl-image FILE equivalent to '--image-file=FILE --'\n\
1.10 pazsan 816: --clear-dictionary Initialize the dictionary with 0 bytes\n\
817: -d SIZE, --data-stack-size=SIZE Specify data stack size\n\
818: --debug Print debugging information during startup\n\
819: --die-on-signal exit instead of CATCHing some signals\n\
820: -f SIZE, --fp-stack-size=SIZE Specify floating point stack size\n\
821: -h, --help Print this message and exit\n\
822: -i FILE, --image-file=FILE Use image FILE instead of `gforth.fi'\n\
823: -l SIZE, --locals-stack-size=SIZE Specify locals stack size\n\
824: -m SIZE, --dictionary-size=SIZE Specify Forth dictionary size\n\
825: --no-offset-im Load image at normal position\n\
826: --offset-image Load image at a different position\n\
827: -p PATH, --path=PATH Search path for finding image and sources\n\
828: -r SIZE, --return-stack-size=SIZE Specify return stack size\n\
829: -v, --version Print version and exit\n\
1.1 anton 830: SIZE arguments consist of an integer followed by a unit. The unit can be\n\
1.10 pazsan 831: `b' (byte), `e' (element; default), `k' (KB), `M' (MB), `G' (GB) or `T' (TB).\n",
832: argv[0]);
833: optind--;
834: return;
1.1 anton 835: }
836: }
1.10 pazsan 837: }
1.11 pazsan 838: #endif
1.10 pazsan 839:
840: #ifdef INCLUDE_IMAGE
841: extern Cell image[];
842: extern const char reloc_bits[];
843: #endif
844:
845: int main(int argc, char **argv, char **env)
846: {
1.30 pazsan 847: #ifdef HAS_OS
1.10 pazsan 848: char *path = getenv("GFORTHPATH") ? : DEFAULTPATH;
1.30 pazsan 849: #else
850: char *path = DEFAULTPATH;
851: #endif
1.13 pazsan 852: #ifndef INCLUDE_IMAGE
1.10 pazsan 853: char *imagename="gforth.fi";
854: FILE *image_file;
855: Address image;
856: #endif
857: int retvalue;
858:
859: #if defined(i386) && defined(ALIGNMENT_CHECK) && !defined(DIRECT_THREADED)
860: /* turn on alignment checks on the 486.
861: * on the 386 this should have no effect. */
862: __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
863: /* this is unusable with Linux' libc.4.6.27, because this library is
864: not alignment-clean; we would have to replace some library
865: functions (e.g., memcpy) to make it work. Also GCC doesn't try to keep
866: the stack FP-aligned. */
867: #endif
868:
869: /* buffering of the user output device */
1.11 pazsan 870: #ifdef _IONBF
1.10 pazsan 871: if (isatty(fileno(stdout))) {
872: fflush(stdout);
873: setvbuf(stdout,NULL,_IONBF,0);
1.1 anton 874: }
1.11 pazsan 875: #endif
1.1 anton 876:
1.10 pazsan 877: progname = argv[0];
878:
1.11 pazsan 879: #ifdef HAS_OS
1.10 pazsan 880: gforth_args(argc, argv, &path, &imagename);
1.11 pazsan 881: #endif
1.10 pazsan 882:
883: #ifdef INCLUDE_IMAGE
884: set_stack_sizes((ImageHeader *)image);
1.22 pazsan 885: if(((ImageHeader *)image)->base != image)
886: relocate(image, reloc_bits, ((ImageHeader *)image)->image_size,
887: (Label*)engine(0, 0, 0, 0, 0));
1.10 pazsan 888: alloc_stacks((ImageHeader *)image);
889: #else
890: image_file = open_image_file(imagename, path);
891: image = loader(image_file, imagename);
892: #endif
1.24 anton 893: gforth_header=(ImageHeader *)image; /* used in SIGSEGV handler */
1.1 anton 894:
895: {
1.10 pazsan 896: char path2[strlen(path)+1];
1.1 anton 897: char *p1, *p2;
898: Cell environ[]= {
899: (Cell)argc-(optind-1),
900: (Cell)(argv+(optind-1)),
1.10 pazsan 901: (Cell)strlen(path),
1.1 anton 902: (Cell)path2};
903: argv[optind-1] = progname;
904: /*
905: for (i=0; i<environ[0]; i++)
906: printf("%s\n", ((char **)(environ[1]))[i]);
907: */
908: /* make path OS-independent by replacing path separators with NUL */
1.10 pazsan 909: for (p1=path, p2=path2; *p1!='\0'; p1++, p2++)
1.1 anton 910: if (*p1==PATHSEP)
911: *p2 = '\0';
912: else
913: *p2 = *p1;
914: *p2='\0';
1.10 pazsan 915: retvalue = go_forth(image, 4, environ);
1.42 anton 916: #ifdef VM_PROFILING
917: vm_print_profile(stderr);
918: #endif
1.1 anton 919: deprep_terminal();
920: }
1.13 pazsan 921: return retvalue;
1.1 anton 922: }
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