Annotation of gforth/engine/main.c, revision 1.59
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:
1.56 anton 60: #if defined(DOUBLY_INDIRECT)
61: # define CFA(n) ({Cell _n = (n); ((Cell)(((_n & 0x4000) ? symbols : xts)+(_n&~0x4000UL)));})
1.1 anton 62: #else
1.56 anton 63: # define CFA(n) ((Cell)(symbols+((n)&~0x4000UL)))
1.1 anton 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;
1.53 anton 97: #ifdef DOUBLY_INDIRECT
98: Label *xts; /* same content as vm_prims, but should only be used for xts */
99: #endif
1.1 anton 100:
1.30 pazsan 101: #ifdef MEMCMP_AS_SUBROUTINE
102: int gforth_memcmp(const char * s1, const char * s2, size_t n)
103: {
104: return memcmp(s1, s2, n);
105: }
106: #endif
107:
1.1 anton 108: /* image file format:
1.15 pazsan 109: * "#! binary-path -i\n" (e.g., "#! /usr/local/bin/gforth-0.4.0 -i\n")
1.1 anton 110: * padding to a multiple of 8
1.15 pazsan 111: * magic: "Gforth2x" means format 0.4,
112: * where x is a byte with
113: * bit 7: reserved = 0
114: * bit 6:5: address unit size 2^n octets
115: * bit 4:3: character size 2^n octets
116: * bit 2:1: cell size 2^n octets
117: * bit 0: endian, big=0, little=1.
118: * The magic are always 8 octets, no matter what the native AU/character size is
1.1 anton 119: * padding to max alignment (no padding necessary on current machines)
1.24 anton 120: * ImageHeader structure (see forth.h)
1.1 anton 121: * data (size in ImageHeader.image_size)
122: * tags ((if relocatable, 1 bit/data cell)
123: *
124: * tag==1 means that the corresponding word is an address;
125: * If the word is >=0, the address is within the image;
126: * addresses within the image are given relative to the start of the image.
127: * If the word =-1 (CF_NIL), the address is NIL,
128: * If the word is <CF_NIL and >CF(DODOES), it's a CFA (:, Create, ...)
129: * If the word =CF(DODOES), it's a DOES> CFA
130: * If the word =CF(DOESJUMP), it's a DOES JUMP (2 Cells after DOES>,
131: * possibly containing a jump to dodoes)
1.51 anton 132: * If the word is <CF(DOESJUMP) and bit 14 is set, it's the xt of a primitive
133: * If the word is <CF(DOESJUMP) and bit 14 is clear,
134: * it's the threaded code of a primitive
1.1 anton 135: */
136:
1.46 jwilke 137: void relocate(Cell *image, const char *bitstring,
138: int size, int base, Label symbols[])
1.1 anton 139: {
1.16 pazsan 140: int i=0, j, k, steps=(size/sizeof(Cell))/RELINFOBITS;
1.11 pazsan 141: Cell token;
1.1 anton 142: char bits;
1.37 anton 143: Cell max_symbols;
1.46 jwilke 144: /*
145: * A virtial start address that's the real start address minus
146: * the one in the image
147: */
1.45 jwilke 148: Cell *start = (Cell * ) (((void *) image) - ((void *) base));
1.1 anton 149:
1.46 jwilke 150:
151: /* printf("relocating to %x[%x] start=%x base=%x\n", image, size, start, base); */
1.37 anton 152:
153: for (max_symbols=DOESJUMP+1; symbols[max_symbols]!=0; max_symbols++)
154: ;
1.47 anton 155: max_symbols--;
1.35 pazsan 156: size/=sizeof(Cell);
157:
1.31 pazsan 158: for(k=0; k<=steps; k++) {
1.13 pazsan 159: for(j=0, bits=bitstring[k]; j<RELINFOBITS; j++, i++, bits<<=1) {
1.1 anton 160: /* fprintf(stderr,"relocate: image[%d]\n", i);*/
1.35 pazsan 161: if((i < size) && (bits & (1U << (RELINFOBITS-1)))) {
162: /* fprintf(stderr,"relocate: image[%d]=%d of %d\n", i, image[i], size/sizeof(Cell)); */
1.45 jwilke 163: token=image[i];
164: if(token<0)
1.55 anton 165: switch(token|0x4000)
1.1 anton 166: {
167: case CF_NIL : image[i]=0; break;
168: #if !defined(DOUBLY_INDIRECT)
169: case CF(DOCOL) :
170: case CF(DOVAR) :
171: case CF(DOCON) :
172: case CF(DOUSER) :
173: case CF(DODEFER) :
1.11 pazsan 174: case CF(DOFIELD) : MAKE_CF(image+i,symbols[CF(token)]); break;
1.1 anton 175: case CF(DOESJUMP): MAKE_DOES_HANDLER(image+i); break;
176: #endif /* !defined(DOUBLY_INDIRECT) */
177: case CF(DODOES) :
1.45 jwilke 178: MAKE_DOES_CF(image+i,(Xt *)(image[i+1]+((Cell)start)));
1.1 anton 179: break;
180: default :
1.56 anton 181: /* printf("Code field generation image[%x]:=CFA(%x)\n",
1.1 anton 182: i, CF(image[i])); */
1.55 anton 183: if (CF((token | 0x4000))<max_symbols) {
1.56 anton 184: image[i]=(Cell)CFA(CF(token));
185: #ifdef DIRECT_THREADED
186: if ((token & 0x4000) == 0) /* threade code, no CFA */
1.57 anton 187: image[i] = (Cell)compile_prim((Label)image[i]);
1.56 anton 188: #endif
1.55 anton 189: } else
1.37 anton 190: fprintf(stderr,"Primitive %d used in this image at $%lx is not implemented by this\n engine (%s); executing this code will crash.\n",CF(token),(long)&image[i],VERSION);
1.1 anton 191: }
1.46 jwilke 192: else {
1.45 jwilke 193: // if base is > 0: 0 is a null reference so don't adjust
194: if (token>=base) {
195: image[i]+=(Cell)start;
196: }
1.46 jwilke 197: }
1.1 anton 198: }
199: }
1.31 pazsan 200: }
1.26 jwilke 201: ((ImageHeader*)(image))->base = (Address) image;
1.1 anton 202: }
203:
204: UCell checksum(Label symbols[])
205: {
206: UCell r=PRIM_VERSION;
207: Cell i;
208:
209: for (i=DOCOL; i<=DOESJUMP; i++) {
210: r ^= (UCell)(symbols[i]);
211: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
212: }
213: #ifdef DIRECT_THREADED
214: /* we have to consider all the primitives */
215: for (; symbols[i]!=(Label)0; i++) {
216: r ^= (UCell)(symbols[i]);
217: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
218: }
219: #else
220: /* in indirect threaded code all primitives are accessed through the
221: symbols table, so we just have to put the base address of symbols
222: in the checksum */
223: r ^= (UCell)symbols;
224: #endif
225: return r;
226: }
227:
1.3 anton 228: Address verbose_malloc(Cell size)
229: {
230: Address r;
231: /* leave a little room (64B) for stack underflows */
232: if ((r = malloc(size+64))==NULL) {
233: perror(progname);
234: exit(1);
235: }
236: r = (Address)((((Cell)r)+(sizeof(Float)-1))&(-sizeof(Float)));
237: if (debug)
238: fprintf(stderr, "malloc succeeds, address=$%lx\n", (long)r);
239: return r;
240: }
241:
1.33 anton 242: static Address next_address=0;
243: void after_alloc(Address r, Cell size)
244: {
245: if (r != (Address)-1) {
246: if (debug)
247: fprintf(stderr, "success, address=$%lx\n", (long) r);
248: if (pagesize != 1)
249: next_address = (Address)(((((Cell)r)+size-1)&-pagesize)+2*pagesize); /* leave one page unmapped */
250: } else {
251: if (debug)
252: fprintf(stderr, "failed: %s\n", strerror(errno));
253: }
254: }
255:
1.34 anton 256: #ifndef MAP_FAILED
257: #define MAP_FAILED ((Address) -1)
258: #endif
259: #ifndef MAP_FILE
260: # define MAP_FILE 0
261: #endif
262: #ifndef MAP_PRIVATE
263: # define MAP_PRIVATE 0
264: #endif
265:
266: #if defined(HAVE_MMAP)
267: static Address alloc_mmap(Cell size)
1.1 anton 268: {
269: Address r;
270:
271: #if defined(MAP_ANON)
272: if (debug)
273: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_ANON, ...); ", (long)next_address, (long)size);
1.34 anton 274: r = mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
1.1 anton 275: #else /* !defined(MAP_ANON) */
1.17 anton 276: /* Ultrix (at least) does not define MAP_FILE and MAP_PRIVATE (both are
277: apparently defaults) */
1.1 anton 278: static int dev_zero=-1;
279:
280: if (dev_zero == -1)
281: dev_zero = open("/dev/zero", O_RDONLY);
282: if (dev_zero == -1) {
1.34 anton 283: r = MAP_FAILED;
1.1 anton 284: if (debug)
285: fprintf(stderr, "open(\"/dev/zero\"...) failed (%s), no mmap; ",
286: strerror(errno));
287: } else {
288: if (debug)
289: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FILE, dev_zero, ...); ", (long)next_address, (long)size);
290: r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FILE|MAP_PRIVATE, dev_zero, 0);
291: }
292: #endif /* !defined(MAP_ANON) */
1.34 anton 293: after_alloc(r, size);
294: return r;
295: }
296: #endif
297:
298: Address my_alloc(Cell size)
299: {
300: #if HAVE_MMAP
301: Address r;
302:
303: r=alloc_mmap(size);
304: if (r!=MAP_FAILED)
1.1 anton 305: return r;
306: #endif /* HAVE_MMAP */
1.3 anton 307: /* use malloc as fallback */
308: return verbose_malloc(size);
1.1 anton 309: }
310:
1.34 anton 311: Address dict_alloc_read(FILE *file, Cell imagesize, Cell dictsize, Cell offset)
1.33 anton 312: {
1.34 anton 313: Address image = MAP_FAILED;
1.33 anton 314:
1.56 anton 315: #if defined(HAVE_MMAP)
1.33 anton 316: if (offset==0) {
1.34 anton 317: image=alloc_mmap(dictsize);
1.33 anton 318: if (debug)
1.34 anton 319: fprintf(stderr,"try mmap($%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: }
1.56 anton 323: #endif /* defined(HAVE_MMAP) */
1.34 anton 324: if (image == MAP_FAILED) {
1.56 anton 325: image = my_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: int i;
1.55 anton 448: Label *symbols2;
1.49 anton 449: static char superend[]={
1.48 anton 450: #include "prim_superend.i"
451: };
1.47 anton 452:
453: for (i=DOESJUMP+1; symbols1[i+1]!=0; i++)
454: ;
1.55 anton 455: npriminfos = i;
456:
457: #if defined(IS_NEXT_JUMP) && !defined(DOUBLY_INDIRECT)
458: symbols2=engine2(0,0,0,0,0);
1.47 anton 459: priminfos = calloc(i,sizeof(PrimInfo));
460: for (i=DOESJUMP+1; symbols1[i+1]!=0; i++) {
461: int prim_len=symbols1[i+1]-symbols1[i];
462: PrimInfo *pi=&priminfos[i];
463: int j;
1.48 anton 464: pi->super_end = superend[i-DOESJUMP-1];
1.50 anton 465: for (j=prim_len-IND_JUMP_LENGTH; ; j--) {
466: if (IS_NEXT_JUMP(symbols1[i]+j)) {
1.47 anton 467: prim_len = j;
1.48 anton 468: if (pi->super_end)
1.50 anton 469: prim_len += IND_JUMP_LENGTH; /* include the jump */
1.47 anton 470: break;
471: }
472: if (j==0) { /* NEXT jump not found, e.g., execute */
1.48 anton 473: if (!pi->super_end && debug)
474: fprintf(stderr, "NEXT jump not found for primitive %d, making it super_end\n", i);
475: pi->super_end = 1;
1.47 anton 476: break;
477: }
478: }
1.59 ! anton 479: pi->length = prim_len;
1.47 anton 480: /* fprintf(stderr,"checking primitive %d: memcmp(%p, %p, %d)\n",
481: i, symbols1[i], symbols2[i], prim_len);*/
482: if (memcmp(symbols1[i],symbols2[i],prim_len)!=0) {
483: if (debug)
484: fprintf(stderr,"Primitive %d not relocatable: memcmp(%p, %p, %d)\n",
485: i, symbols1[i], symbols2[i], prim_len);
486: } else {
487: pi->start = symbols1[i];
488: if (debug)
489: fprintf(stderr,"Primitive %d relocatable: start %p, length %ld, super_end %d\n",
490: i, pi->start, pi->length, pi->super_end);
491: }
1.48 anton 492: }
493: #endif
494: }
495:
496: Label compile_prim(Label prim)
497: {
1.54 anton 498: #ifdef DOUBLY_INDIRECT
499: if (prim<((Label)(xts+DOESJUMP)) || prim>((Label)(xts+npriminfos))) {
500: fprintf(stderr,"compile_prim encountered xt %p\n", prim);
501: return prim;
502: } else
503: return prim-((Label)xts)+((Label)vm_prims);
504: #else /* !defined(DOUBLY_INDIRECT) */
1.59 ! anton 505: #if defined(IND_JUMP_LENGTH) && !defined(VM_PROFILING)
1.58 anton 506: unsigned i;
1.48 anton 507: Address old_code_here=code_here;
508: static Address last_jump=0;
509:
1.58 anton 510: i = ((Xt)prim)-vm_prims;
1.56 anton 511: prim = *(Xt)prim;
1.58 anton 512: if (i>=npriminfos || priminfos[i].start == 0) { /* not a relocatable prim */
513: if (last_jump) { /* make sure the last sequence is complete */
514: memcpy(code_here, last_jump, IND_JUMP_LENGTH);
515: code_here += IND_JUMP_LENGTH;
516: last_jump = 0;
1.48 anton 517: }
1.58 anton 518: return prim;
1.47 anton 519: }
1.58 anton 520: assert(priminfos[i].start = prim);
1.50 anton 521: #ifdef ALIGN_CODE
522: ALIGN_CODE;
523: #endif
1.48 anton 524: memcpy(code_here, (Address)prim, priminfos[i].length);
525: code_here += priminfos[i].length;
526: last_jump = (priminfos[i].super_end) ? 0 : (prim+priminfos[i].length);
527: return (Label)old_code_here;
1.50 anton 528: #else
1.56 anton 529: prim = *(Xt)prim;
1.50 anton 530: return prim;
531: #endif
1.54 anton 532: #endif /* !defined(DOUBLY_INDIRECT) */
1.47 anton 533: }
534:
1.59 ! anton 535: #ifdef PRINT_SUPER_LENGTHS
! 536: Cell prim_length(Cell prim)
! 537: {
! 538: return priminfos[prim+DOESJUMP+1].length;
! 539: }
! 540: #endif
! 541:
1.1 anton 542: Address loader(FILE *imagefile, char* filename)
543: /* returns the address of the image proper (after the preamble) */
544: {
545: ImageHeader header;
546: Address image;
547: Address imp; /* image+preamble */
1.17 anton 548: Char magic[8];
549: char magic7; /* size byte of magic number */
1.1 anton 550: Cell preamblesize=0;
1.6 pazsan 551: Cell data_offset = offset_image ? 56*sizeof(Cell) : 0;
1.1 anton 552: UCell check_sum;
1.15 pazsan 553: Cell ausize = ((RELINFOBITS == 8) ? 0 :
554: (RELINFOBITS == 16) ? 1 :
555: (RELINFOBITS == 32) ? 2 : 3);
556: Cell charsize = ((sizeof(Char) == 1) ? 0 :
557: (sizeof(Char) == 2) ? 1 :
558: (sizeof(Char) == 4) ? 2 : 3) + ausize;
559: Cell cellsize = ((sizeof(Cell) == 1) ? 0 :
560: (sizeof(Cell) == 2) ? 1 :
561: (sizeof(Cell) == 4) ? 2 : 3) + ausize;
1.21 anton 562: Cell sizebyte = (ausize << 5) + (charsize << 3) + (cellsize << 1) +
563: #ifdef WORDS_BIGENDIAN
564: 0
565: #else
566: 1
567: #endif
568: ;
1.1 anton 569:
1.43 anton 570: vm_prims = engine(0,0,0,0,0);
1.47 anton 571: check_prims(vm_prims);
1.1 anton 572: #ifndef DOUBLY_INDIRECT
1.59 ! anton 573: #ifdef PRINT_SUPER_LENGTHS
! 574: print_super_lengths();
! 575: #endif
1.43 anton 576: check_sum = checksum(vm_prims);
1.1 anton 577: #else /* defined(DOUBLY_INDIRECT) */
1.43 anton 578: check_sum = (UCell)vm_prims;
1.1 anton 579: #endif /* defined(DOUBLY_INDIRECT) */
1.10 pazsan 580:
581: do {
582: if(fread(magic,sizeof(Char),8,imagefile) < 8) {
1.15 pazsan 583: fprintf(stderr,"%s: image %s doesn't seem to be a Gforth (>=0.4) image.\n",
1.10 pazsan 584: progname, filename);
585: exit(1);
1.1 anton 586: }
1.10 pazsan 587: preamblesize+=8;
1.15 pazsan 588: } while(memcmp(magic,"Gforth2",7));
1.17 anton 589: magic7 = magic[7];
1.1 anton 590: if (debug) {
1.17 anton 591: magic[7]='\0';
1.21 anton 592: fprintf(stderr,"Magic found: %s ", magic);
593: print_sizes(magic7);
1.1 anton 594: }
595:
1.21 anton 596: if (magic7 != sizebyte)
597: {
598: fprintf(stderr,"This image is: ");
599: print_sizes(magic7);
600: fprintf(stderr,"whereas the machine is ");
601: print_sizes(sizebyte);
1.1 anton 602: exit(-2);
603: };
604:
605: fread((void *)&header,sizeof(ImageHeader),1,imagefile);
1.10 pazsan 606:
607: set_stack_sizes(&header);
1.1 anton 608:
609: #if HAVE_GETPAGESIZE
610: pagesize=getpagesize(); /* Linux/GNU libc offers this */
611: #elif HAVE_SYSCONF && defined(_SC_PAGESIZE)
612: pagesize=sysconf(_SC_PAGESIZE); /* POSIX.4 */
613: #elif PAGESIZE
614: pagesize=PAGESIZE; /* in limits.h according to Gallmeister's POSIX.4 book */
615: #endif
616: if (debug)
1.5 jwilke 617: fprintf(stderr,"pagesize=%ld\n",(unsigned long) pagesize);
1.1 anton 618:
1.34 anton 619: image = dict_alloc_read(imagefile, preamblesize+header.image_size,
620: preamblesize+dictsize, data_offset);
1.33 anton 621: imp=image+preamblesize;
1.57 anton 622: alloc_stacks((ImageHeader *)imp);
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:
1.56 anton 656: /* unnecessary, except maybe for CODE words */
657: /* FLUSH_ICACHE(imp, header.image_size);*/
1.1 anton 658:
659: return imp;
660: }
661:
1.28 anton 662: /* index of last '/' or '\' in file, 0 if there is none. !! Hmm, could
663: be implemented with strrchr and the separator should be
664: OS-dependent */
1.1 anton 665: int onlypath(char *file)
1.10 pazsan 666: {
667: int i;
1.1 anton 668: i=strlen(file);
1.10 pazsan 669: while (i) {
670: if (file[i]=='\\' || file[i]=='/') break;
671: i--;
672: }
673: return i;
1.1 anton 674: }
675:
676: FILE *openimage(char *fullfilename)
1.10 pazsan 677: {
678: FILE *image_file;
1.28 anton 679: char * expfilename = tilde_cstr(fullfilename, strlen(fullfilename), 1);
1.10 pazsan 680:
1.28 anton 681: image_file=fopen(expfilename,"rb");
1.1 anton 682: if (image_file!=NULL && debug)
1.28 anton 683: fprintf(stderr, "Opened image file: %s\n", expfilename);
1.10 pazsan 684: return image_file;
1.1 anton 685: }
686:
1.28 anton 687: /* try to open image file concat(path[0:len],imagename) */
1.1 anton 688: FILE *checkimage(char *path, int len, char *imagename)
1.10 pazsan 689: {
690: int dirlen=len;
1.1 anton 691: char fullfilename[dirlen+strlen(imagename)+2];
1.10 pazsan 692:
1.1 anton 693: memcpy(fullfilename, path, dirlen);
694: if (fullfilename[dirlen-1]!='/')
695: fullfilename[dirlen++]='/';
696: strcpy(fullfilename+dirlen,imagename);
1.10 pazsan 697: return openimage(fullfilename);
1.1 anton 698: }
699:
1.10 pazsan 700: FILE * open_image_file(char * imagename, char * path)
1.1 anton 701: {
1.10 pazsan 702: FILE * image_file=NULL;
1.28 anton 703: char *origpath=path;
1.10 pazsan 704:
705: if(strchr(imagename, '/')==NULL) {
706: /* first check the directory where the exe file is in !! 01may97jaw */
707: if (onlypath(progname))
708: image_file=checkimage(progname, onlypath(progname), imagename);
709: if (!image_file)
710: do {
711: char *pend=strchr(path, PATHSEP);
712: if (pend==NULL)
713: pend=path+strlen(path);
714: if (strlen(path)==0) break;
715: image_file=checkimage(path, pend-path, imagename);
716: path=pend+(*pend==PATHSEP);
717: } while (image_file==NULL);
718: } else {
719: image_file=openimage(imagename);
720: }
1.1 anton 721:
1.10 pazsan 722: if (!image_file) {
723: fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n",
1.28 anton 724: progname, imagename, origpath);
1.10 pazsan 725: exit(1);
1.7 anton 726: }
727:
1.10 pazsan 728: return image_file;
729: }
1.11 pazsan 730: #endif
731:
732: #ifdef HAS_OS
733: UCell convsize(char *s, UCell elemsize)
734: /* converts s of the format [0-9]+[bekMGT]? (e.g. 25k) into the number
735: of bytes. the letter at the end indicates the unit, where e stands
736: for the element size. default is e */
737: {
738: char *endp;
739: UCell n,m;
740:
741: m = elemsize;
742: n = strtoul(s,&endp,0);
743: if (endp!=NULL) {
744: if (strcmp(endp,"b")==0)
745: m=1;
746: else if (strcmp(endp,"k")==0)
747: m=1024;
748: else if (strcmp(endp,"M")==0)
749: m=1024*1024;
750: else if (strcmp(endp,"G")==0)
751: m=1024*1024*1024;
752: else if (strcmp(endp,"T")==0) {
753: #if (SIZEOF_CHAR_P > 4)
1.24 anton 754: m=1024L*1024*1024*1024;
1.11 pazsan 755: #else
756: fprintf(stderr,"%s: size specification \"%s\" too large for this machine\n", progname, endp);
757: exit(1);
758: #endif
759: } else if (strcmp(endp,"e")!=0 && strcmp(endp,"")!=0) {
760: fprintf(stderr,"%s: cannot grok size specification %s: invalid unit \"%s\"\n", progname, s, endp);
761: exit(1);
762: }
763: }
764: return n*m;
765: }
1.10 pazsan 766:
767: void gforth_args(int argc, char ** argv, char ** path, char ** imagename)
768: {
769: int c;
770:
1.1 anton 771: opterr=0;
772: while (1) {
773: int option_index=0;
774: static struct option opts[] = {
1.29 anton 775: {"appl-image", required_argument, NULL, 'a'},
1.1 anton 776: {"image-file", required_argument, NULL, 'i'},
777: {"dictionary-size", required_argument, NULL, 'm'},
778: {"data-stack-size", required_argument, NULL, 'd'},
779: {"return-stack-size", required_argument, NULL, 'r'},
780: {"fp-stack-size", required_argument, NULL, 'f'},
781: {"locals-stack-size", required_argument, NULL, 'l'},
782: {"path", required_argument, NULL, 'p'},
783: {"version", no_argument, NULL, 'v'},
784: {"help", no_argument, NULL, 'h'},
785: /* put something != 0 into offset_image */
786: {"offset-image", no_argument, &offset_image, 1},
787: {"no-offset-im", no_argument, &offset_image, 0},
788: {"clear-dictionary", no_argument, &clear_dictionary, 1},
1.4 anton 789: {"die-on-signal", no_argument, &die_on_signal, 1},
1.1 anton 790: {"debug", no_argument, &debug, 1},
791: {0,0,0,0}
792: /* no-init-file, no-rc? */
793: };
794:
1.36 pazsan 795: c = getopt_long(argc, argv, "+i:m:d:r:f:l:p:vhoncsx", opts, &option_index);
1.1 anton 796:
797: switch (c) {
1.29 anton 798: case EOF: return;
799: case '?': optind--; return;
800: case 'a': *imagename = optarg; return;
1.10 pazsan 801: case 'i': *imagename = optarg; break;
1.1 anton 802: case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
803: case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
804: case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
805: case 'f': fsize = convsize(optarg,sizeof(Float)); break;
806: case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
1.10 pazsan 807: case 'p': *path = optarg; break;
1.36 pazsan 808: case 'o': offset_image = 1; break;
809: case 'n': offset_image = 0; break;
810: case 'c': clear_dictionary = 1; break;
811: case 's': die_on_signal = 1; break;
812: case 'x': debug = 1; break;
1.8 anton 813: case 'v': fprintf(stderr, "gforth %s\n", VERSION); exit(0);
1.1 anton 814: case 'h':
1.29 anton 815: fprintf(stderr, "Usage: %s [engine options] ['--'] [image arguments]\n\
1.1 anton 816: Engine Options:\n\
1.29 anton 817: --appl-image FILE equivalent to '--image-file=FILE --'\n\
1.10 pazsan 818: --clear-dictionary Initialize the dictionary with 0 bytes\n\
819: -d SIZE, --data-stack-size=SIZE Specify data stack size\n\
820: --debug Print debugging information during startup\n\
821: --die-on-signal exit instead of CATCHing some signals\n\
822: -f SIZE, --fp-stack-size=SIZE Specify floating point stack size\n\
823: -h, --help Print this message and exit\n\
824: -i FILE, --image-file=FILE Use image FILE instead of `gforth.fi'\n\
825: -l SIZE, --locals-stack-size=SIZE Specify locals stack size\n\
826: -m SIZE, --dictionary-size=SIZE Specify Forth dictionary size\n\
827: --no-offset-im Load image at normal position\n\
828: --offset-image Load image at a different position\n\
829: -p PATH, --path=PATH Search path for finding image and sources\n\
830: -r SIZE, --return-stack-size=SIZE Specify return stack size\n\
831: -v, --version Print version and exit\n\
1.1 anton 832: SIZE arguments consist of an integer followed by a unit. The unit can be\n\
1.10 pazsan 833: `b' (byte), `e' (element; default), `k' (KB), `M' (MB), `G' (GB) or `T' (TB).\n",
834: argv[0]);
835: optind--;
836: return;
1.1 anton 837: }
838: }
1.10 pazsan 839: }
1.11 pazsan 840: #endif
1.10 pazsan 841:
842: #ifdef INCLUDE_IMAGE
843: extern Cell image[];
844: extern const char reloc_bits[];
845: #endif
846:
847: int main(int argc, char **argv, char **env)
848: {
1.30 pazsan 849: #ifdef HAS_OS
1.10 pazsan 850: char *path = getenv("GFORTHPATH") ? : DEFAULTPATH;
1.30 pazsan 851: #else
852: char *path = DEFAULTPATH;
853: #endif
1.13 pazsan 854: #ifndef INCLUDE_IMAGE
1.10 pazsan 855: char *imagename="gforth.fi";
856: FILE *image_file;
857: Address image;
858: #endif
859: int retvalue;
860:
1.56 anton 861: #if defined(i386) && defined(ALIGNMENT_CHECK)
1.10 pazsan 862: /* turn on alignment checks on the 486.
863: * on the 386 this should have no effect. */
864: __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
865: /* this is unusable with Linux' libc.4.6.27, because this library is
866: not alignment-clean; we would have to replace some library
867: functions (e.g., memcpy) to make it work. Also GCC doesn't try to keep
868: the stack FP-aligned. */
869: #endif
870:
871: /* buffering of the user output device */
1.11 pazsan 872: #ifdef _IONBF
1.10 pazsan 873: if (isatty(fileno(stdout))) {
874: fflush(stdout);
875: setvbuf(stdout,NULL,_IONBF,0);
1.1 anton 876: }
1.11 pazsan 877: #endif
1.1 anton 878:
1.10 pazsan 879: progname = argv[0];
880:
1.11 pazsan 881: #ifdef HAS_OS
1.10 pazsan 882: gforth_args(argc, argv, &path, &imagename);
1.11 pazsan 883: #endif
1.10 pazsan 884:
885: #ifdef INCLUDE_IMAGE
886: set_stack_sizes((ImageHeader *)image);
1.22 pazsan 887: if(((ImageHeader *)image)->base != image)
888: relocate(image, reloc_bits, ((ImageHeader *)image)->image_size,
889: (Label*)engine(0, 0, 0, 0, 0));
1.10 pazsan 890: alloc_stacks((ImageHeader *)image);
891: #else
892: image_file = open_image_file(imagename, path);
893: image = loader(image_file, imagename);
894: #endif
1.24 anton 895: gforth_header=(ImageHeader *)image; /* used in SIGSEGV handler */
1.1 anton 896:
897: {
1.10 pazsan 898: char path2[strlen(path)+1];
1.1 anton 899: char *p1, *p2;
900: Cell environ[]= {
901: (Cell)argc-(optind-1),
902: (Cell)(argv+(optind-1)),
1.10 pazsan 903: (Cell)strlen(path),
1.1 anton 904: (Cell)path2};
905: argv[optind-1] = progname;
906: /*
907: for (i=0; i<environ[0]; i++)
908: printf("%s\n", ((char **)(environ[1]))[i]);
909: */
910: /* make path OS-independent by replacing path separators with NUL */
1.10 pazsan 911: for (p1=path, p2=path2; *p1!='\0'; p1++, p2++)
1.1 anton 912: if (*p1==PATHSEP)
913: *p2 = '\0';
914: else
915: *p2 = *p1;
916: *p2='\0';
1.10 pazsan 917: retvalue = go_forth(image, 4, environ);
1.42 anton 918: #ifdef VM_PROFILING
919: vm_print_profile(stderr);
920: #endif
1.1 anton 921: deprep_terminal();
922: }
1.13 pazsan 923: return retvalue;
1.1 anton 924: }
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