Annotation of gforth/engine/main.c, revision 1.68
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 */
1.65 anton 86: Address start_flush=0; /* start of unflushed code */
1.48 anton 87:
1.60 anton 88: static int no_super=0; /* true if compile_prim should not fuse prims */
1.66 anton 89: /* --no-dynamic by default on gcc versions >=3.1 (it works with 3.0.4,
90: but not with 3.2) */
91: #if (__GNUC__>2 && __GNUC_MINOR__>=1)
1.64 anton 92: static int no_dynamic=1; /* true if compile_prim should not generate code */
1.66 anton 93: #else
94: static int no_dynamic=0; /* true if compile_prim should not generate code */
95: #endif
1.60 anton 96:
1.30 pazsan 97: #ifdef HAS_DEBUG
1.68 ! anton 98: int debug=0;
1.31 pazsan 99: #else
100: # define perror(x...)
101: # define fprintf(x...)
1.30 pazsan 102: #endif
1.31 pazsan 103:
1.24 anton 104: ImageHeader *gforth_header;
1.43 anton 105: Label *vm_prims;
1.53 anton 106: #ifdef DOUBLY_INDIRECT
107: Label *xts; /* same content as vm_prims, but should only be used for xts */
108: #endif
1.1 anton 109:
1.30 pazsan 110: #ifdef MEMCMP_AS_SUBROUTINE
111: int gforth_memcmp(const char * s1, const char * s2, size_t n)
112: {
113: return memcmp(s1, s2, n);
114: }
115: #endif
116:
1.1 anton 117: /* image file format:
1.15 pazsan 118: * "#! binary-path -i\n" (e.g., "#! /usr/local/bin/gforth-0.4.0 -i\n")
1.1 anton 119: * padding to a multiple of 8
1.15 pazsan 120: * magic: "Gforth2x" means format 0.4,
121: * where x is a byte with
122: * bit 7: reserved = 0
123: * bit 6:5: address unit size 2^n octets
124: * bit 4:3: character size 2^n octets
125: * bit 2:1: cell size 2^n octets
126: * bit 0: endian, big=0, little=1.
127: * The magic are always 8 octets, no matter what the native AU/character size is
1.1 anton 128: * padding to max alignment (no padding necessary on current machines)
1.24 anton 129: * ImageHeader structure (see forth.h)
1.1 anton 130: * data (size in ImageHeader.image_size)
131: * tags ((if relocatable, 1 bit/data cell)
132: *
133: * tag==1 means that the corresponding word is an address;
134: * If the word is >=0, the address is within the image;
135: * addresses within the image are given relative to the start of the image.
136: * If the word =-1 (CF_NIL), the address is NIL,
137: * If the word is <CF_NIL and >CF(DODOES), it's a CFA (:, Create, ...)
138: * If the word =CF(DODOES), it's a DOES> CFA
139: * If the word =CF(DOESJUMP), it's a DOES JUMP (2 Cells after DOES>,
140: * possibly containing a jump to dodoes)
1.51 anton 141: * If the word is <CF(DOESJUMP) and bit 14 is set, it's the xt of a primitive
142: * If the word is <CF(DOESJUMP) and bit 14 is clear,
143: * it's the threaded code of a primitive
1.1 anton 144: */
145:
1.46 jwilke 146: void relocate(Cell *image, const char *bitstring,
147: int size, int base, Label symbols[])
1.1 anton 148: {
1.16 pazsan 149: int i=0, j, k, steps=(size/sizeof(Cell))/RELINFOBITS;
1.11 pazsan 150: Cell token;
1.1 anton 151: char bits;
1.37 anton 152: Cell max_symbols;
1.46 jwilke 153: /*
154: * A virtial start address that's the real start address minus
155: * the one in the image
156: */
1.45 jwilke 157: Cell *start = (Cell * ) (((void *) image) - ((void *) base));
1.1 anton 158:
1.46 jwilke 159:
160: /* printf("relocating to %x[%x] start=%x base=%x\n", image, size, start, base); */
1.37 anton 161:
162: for (max_symbols=DOESJUMP+1; symbols[max_symbols]!=0; max_symbols++)
163: ;
1.47 anton 164: max_symbols--;
1.35 pazsan 165: size/=sizeof(Cell);
166:
1.31 pazsan 167: for(k=0; k<=steps; k++) {
1.13 pazsan 168: for(j=0, bits=bitstring[k]; j<RELINFOBITS; j++, i++, bits<<=1) {
1.1 anton 169: /* fprintf(stderr,"relocate: image[%d]\n", i);*/
1.35 pazsan 170: if((i < size) && (bits & (1U << (RELINFOBITS-1)))) {
171: /* fprintf(stderr,"relocate: image[%d]=%d of %d\n", i, image[i], size/sizeof(Cell)); */
1.45 jwilke 172: token=image[i];
173: if(token<0)
1.55 anton 174: switch(token|0x4000)
1.1 anton 175: {
176: case CF_NIL : image[i]=0; break;
177: #if !defined(DOUBLY_INDIRECT)
178: case CF(DOCOL) :
179: case CF(DOVAR) :
180: case CF(DOCON) :
181: case CF(DOUSER) :
182: case CF(DODEFER) :
1.11 pazsan 183: case CF(DOFIELD) : MAKE_CF(image+i,symbols[CF(token)]); break;
1.1 anton 184: case CF(DOESJUMP): MAKE_DOES_HANDLER(image+i); break;
185: #endif /* !defined(DOUBLY_INDIRECT) */
186: case CF(DODOES) :
1.45 jwilke 187: MAKE_DOES_CF(image+i,(Xt *)(image[i+1]+((Cell)start)));
1.1 anton 188: break;
189: default :
1.56 anton 190: /* printf("Code field generation image[%x]:=CFA(%x)\n",
1.1 anton 191: i, CF(image[i])); */
1.55 anton 192: if (CF((token | 0x4000))<max_symbols) {
1.56 anton 193: image[i]=(Cell)CFA(CF(token));
194: #ifdef DIRECT_THREADED
195: if ((token & 0x4000) == 0) /* threade code, no CFA */
1.57 anton 196: image[i] = (Cell)compile_prim((Label)image[i]);
1.56 anton 197: #endif
1.55 anton 198: } else
1.37 anton 199: fprintf(stderr,"Primitive %d used in this image at $%lx is not implemented by this\n engine (%s); executing this code will crash.\n",CF(token),(long)&image[i],VERSION);
1.1 anton 200: }
1.46 jwilke 201: else {
1.45 jwilke 202: // if base is > 0: 0 is a null reference so don't adjust
203: if (token>=base) {
204: image[i]+=(Cell)start;
205: }
1.46 jwilke 206: }
1.1 anton 207: }
208: }
1.31 pazsan 209: }
1.26 jwilke 210: ((ImageHeader*)(image))->base = (Address) image;
1.1 anton 211: }
212:
213: UCell checksum(Label symbols[])
214: {
215: UCell r=PRIM_VERSION;
216: Cell i;
217:
218: for (i=DOCOL; i<=DOESJUMP; i++) {
219: r ^= (UCell)(symbols[i]);
220: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
221: }
222: #ifdef DIRECT_THREADED
223: /* we have to consider all the primitives */
224: for (; symbols[i]!=(Label)0; i++) {
225: r ^= (UCell)(symbols[i]);
226: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
227: }
228: #else
229: /* in indirect threaded code all primitives are accessed through the
230: symbols table, so we just have to put the base address of symbols
231: in the checksum */
232: r ^= (UCell)symbols;
233: #endif
234: return r;
235: }
236:
1.3 anton 237: Address verbose_malloc(Cell size)
238: {
239: Address r;
240: /* leave a little room (64B) for stack underflows */
241: if ((r = malloc(size+64))==NULL) {
242: perror(progname);
243: exit(1);
244: }
245: r = (Address)((((Cell)r)+(sizeof(Float)-1))&(-sizeof(Float)));
246: if (debug)
247: fprintf(stderr, "malloc succeeds, address=$%lx\n", (long)r);
248: return r;
249: }
250:
1.33 anton 251: static Address next_address=0;
252: void after_alloc(Address r, Cell size)
253: {
254: if (r != (Address)-1) {
255: if (debug)
256: fprintf(stderr, "success, address=$%lx\n", (long) r);
257: if (pagesize != 1)
258: next_address = (Address)(((((Cell)r)+size-1)&-pagesize)+2*pagesize); /* leave one page unmapped */
259: } else {
260: if (debug)
261: fprintf(stderr, "failed: %s\n", strerror(errno));
262: }
263: }
264:
1.34 anton 265: #ifndef MAP_FAILED
266: #define MAP_FAILED ((Address) -1)
267: #endif
268: #ifndef MAP_FILE
269: # define MAP_FILE 0
270: #endif
271: #ifndef MAP_PRIVATE
272: # define MAP_PRIVATE 0
273: #endif
274:
275: #if defined(HAVE_MMAP)
276: static Address alloc_mmap(Cell size)
1.1 anton 277: {
278: Address r;
279:
280: #if defined(MAP_ANON)
281: if (debug)
282: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_ANON, ...); ", (long)next_address, (long)size);
1.34 anton 283: r = mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
1.1 anton 284: #else /* !defined(MAP_ANON) */
1.17 anton 285: /* Ultrix (at least) does not define MAP_FILE and MAP_PRIVATE (both are
286: apparently defaults) */
1.1 anton 287: static int dev_zero=-1;
288:
289: if (dev_zero == -1)
290: dev_zero = open("/dev/zero", O_RDONLY);
291: if (dev_zero == -1) {
1.34 anton 292: r = MAP_FAILED;
1.1 anton 293: if (debug)
294: fprintf(stderr, "open(\"/dev/zero\"...) failed (%s), no mmap; ",
295: strerror(errno));
296: } else {
297: if (debug)
298: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FILE, dev_zero, ...); ", (long)next_address, (long)size);
299: r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FILE|MAP_PRIVATE, dev_zero, 0);
300: }
301: #endif /* !defined(MAP_ANON) */
1.34 anton 302: after_alloc(r, size);
303: return r;
304: }
305: #endif
306:
307: Address my_alloc(Cell size)
308: {
309: #if HAVE_MMAP
310: Address r;
311:
312: r=alloc_mmap(size);
313: if (r!=MAP_FAILED)
1.1 anton 314: return r;
315: #endif /* HAVE_MMAP */
1.3 anton 316: /* use malloc as fallback */
317: return verbose_malloc(size);
1.1 anton 318: }
319:
1.34 anton 320: Address dict_alloc_read(FILE *file, Cell imagesize, Cell dictsize, Cell offset)
1.33 anton 321: {
1.34 anton 322: Address image = MAP_FAILED;
1.33 anton 323:
1.56 anton 324: #if defined(HAVE_MMAP)
1.33 anton 325: if (offset==0) {
1.34 anton 326: image=alloc_mmap(dictsize);
1.33 anton 327: if (debug)
1.34 anton 328: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FIXED|MAP_FILE, imagefile, 0); ", (long)image, (long)imagesize);
329: image = mmap(image, imagesize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FIXED|MAP_FILE|MAP_PRIVATE, fileno(file), 0);
330: after_alloc(image,dictsize);
1.33 anton 331: }
1.56 anton 332: #endif /* defined(HAVE_MMAP) */
1.34 anton 333: if (image == MAP_FAILED) {
1.56 anton 334: image = my_alloc(dictsize+offset)+offset;
1.33 anton 335: rewind(file); /* fseek(imagefile,0L,SEEK_SET); */
1.34 anton 336: fread(image, 1, imagesize, file);
1.33 anton 337: }
338: return image;
339: }
340:
1.10 pazsan 341: void set_stack_sizes(ImageHeader * header)
342: {
343: if (dictsize==0)
344: dictsize = header->dict_size;
345: if (dsize==0)
346: dsize = header->data_stack_size;
347: if (rsize==0)
348: rsize = header->return_stack_size;
349: if (fsize==0)
350: fsize = header->fp_stack_size;
351: if (lsize==0)
352: lsize = header->locals_stack_size;
353: dictsize=maxaligned(dictsize);
354: dsize=maxaligned(dsize);
355: rsize=maxaligned(rsize);
356: lsize=maxaligned(lsize);
357: fsize=maxaligned(fsize);
358: }
359:
360: void alloc_stacks(ImageHeader * header)
361: {
362: header->dict_size=dictsize;
363: header->data_stack_size=dsize;
364: header->fp_stack_size=fsize;
365: header->return_stack_size=rsize;
366: header->locals_stack_size=lsize;
367:
368: header->data_stack_base=my_alloc(dsize);
369: header->fp_stack_base=my_alloc(fsize);
370: header->return_stack_base=my_alloc(rsize);
371: header->locals_stack_base=my_alloc(lsize);
1.65 anton 372: code_here = start_flush = code_area = my_alloc(dictsize);
1.10 pazsan 373: }
374:
1.44 pazsan 375: #warning You can ignore the warnings about clobbered variables in go_forth
1.11 pazsan 376: int go_forth(Address image, int stack, Cell *entries)
377: {
1.38 anton 378: volatile ImageHeader *image_header = (ImageHeader *)image;
1.18 anton 379: Cell *sp0=(Cell*)(image_header->data_stack_base + dsize);
1.44 pazsan 380: Cell *rp0=(Cell *)(image_header->return_stack_base + rsize);
1.18 anton 381: Float *fp0=(Float *)(image_header->fp_stack_base + fsize);
1.44 pazsan 382: #ifdef GFORTH_DEBUGGING
1.38 anton 383: volatile Cell *orig_rp0=rp0;
1.44 pazsan 384: #endif
1.18 anton 385: Address lp0=image_header->locals_stack_base + lsize;
386: Xt *ip0=(Xt *)(image_header->boot_entry);
1.13 pazsan 387: #ifdef SYSSIGNALS
1.11 pazsan 388: int throw_code;
1.13 pazsan 389: #endif
1.11 pazsan 390:
391: /* ensure that the cached elements (if any) are accessible */
1.41 anton 392: IF_spTOS(sp0--);
393: IF_fpTOS(fp0--);
1.11 pazsan 394:
395: for(;stack>0;stack--)
1.18 anton 396: *--sp0=entries[stack-1];
1.11 pazsan 397:
1.30 pazsan 398: #ifdef SYSSIGNALS
1.11 pazsan 399: get_winsize();
400:
401: install_signal_handlers(); /* right place? */
402:
403: if ((throw_code=setjmp(throw_jmp_buf))) {
404: static Cell signal_data_stack[8];
405: static Cell signal_return_stack[8];
406: static Float signal_fp_stack[1];
1.13 pazsan 407:
1.11 pazsan 408: signal_data_stack[7]=throw_code;
1.18 anton 409:
410: #ifdef GFORTH_DEBUGGING
1.38 anton 411: /* fprintf(stderr,"\nrp=%ld\n",(long)rp); */
412: if (rp <= orig_rp0 && rp > (Cell *)(image_header->return_stack_base+5)) {
1.18 anton 413: /* no rstack overflow or underflow */
414: rp0 = rp;
1.63 anton 415: *--rp0 = (Cell)saved_ip;
1.18 anton 416: }
417: else /* I love non-syntactic ifdefs :-) */
418: #endif
419: rp0 = signal_return_stack+8;
1.25 anton 420: /* fprintf(stderr, "rp=$%x\n",rp0);*/
1.11 pazsan 421:
1.33 anton 422: return((int)(Cell)engine(image_header->throw_entry, signal_data_stack+7,
1.18 anton 423: rp0, signal_fp_stack, 0));
1.11 pazsan 424: }
1.13 pazsan 425: #endif
1.11 pazsan 426:
1.33 anton 427: return((int)(Cell)engine(ip0,sp0,rp0,fp0,lp0));
1.11 pazsan 428: }
429:
1.21 anton 430:
1.30 pazsan 431: #ifndef INCLUDE_IMAGE
1.21 anton 432: void print_sizes(Cell sizebyte)
433: /* print size information */
434: {
435: static char* endianstring[]= { " big","little" };
436:
437: fprintf(stderr,"%s endian, cell=%d bytes, char=%d bytes, au=%d bytes\n",
438: endianstring[sizebyte & 1],
439: 1 << ((sizebyte >> 1) & 3),
440: 1 << ((sizebyte >> 3) & 3),
441: 1 << ((sizebyte >> 5) & 3));
442: }
443:
1.47 anton 444: typedef struct {
445: Label start;
446: Cell length; /* excluding the jump */
447: char super_end; /* true if primitive ends superinstruction, i.e.,
448: unconditional branch, execute, etc. */
449: } PrimInfo;
450:
451: PrimInfo *priminfos;
1.48 anton 452: Cell npriminfos=0;
1.47 anton 453:
454: void check_prims(Label symbols1[])
455: {
456: int i;
1.55 anton 457: Label *symbols2;
1.49 anton 458: static char superend[]={
1.48 anton 459: #include "prim_superend.i"
460: };
1.47 anton 461:
1.66 anton 462: if (debug)
463: #ifdef __VERSION__
464: fprintf(stderr, "Compiled with gcc-" __VERSION__ "\n");
465: #else
466: #define xstr(s) str(s)
467: #define str(s) #s
468: fprintf(stderr, "Compiled with gcc-" xstr(__GNUC__) "." xstr(__GNUC_MINOR__) "\n");
469: #endif
1.47 anton 470: for (i=DOESJUMP+1; symbols1[i+1]!=0; i++)
471: ;
1.55 anton 472: npriminfos = i;
473:
1.66 anton 474: #if defined(IS_NEXT_JUMP) && !defined(DOUBLY_INDIRECT)
475: if (no_dynamic)
476: return;
1.55 anton 477: symbols2=engine2(0,0,0,0,0);
1.47 anton 478: priminfos = calloc(i,sizeof(PrimInfo));
479: for (i=DOESJUMP+1; symbols1[i+1]!=0; i++) {
480: int prim_len=symbols1[i+1]-symbols1[i];
481: PrimInfo *pi=&priminfos[i];
482: int j;
1.60 anton 483: pi->super_end = superend[i-DOESJUMP-1]|no_super;
1.50 anton 484: for (j=prim_len-IND_JUMP_LENGTH; ; j--) {
485: if (IS_NEXT_JUMP(symbols1[i]+j)) {
1.47 anton 486: prim_len = j;
1.48 anton 487: if (pi->super_end)
1.50 anton 488: prim_len += IND_JUMP_LENGTH; /* include the jump */
1.47 anton 489: break;
490: }
491: if (j==0) { /* NEXT jump not found, e.g., execute */
1.48 anton 492: if (!pi->super_end && debug)
493: fprintf(stderr, "NEXT jump not found for primitive %d, making it super_end\n", i);
494: pi->super_end = 1;
1.47 anton 495: break;
496: }
497: }
1.59 anton 498: pi->length = prim_len;
1.47 anton 499: /* fprintf(stderr,"checking primitive %d: memcmp(%p, %p, %d)\n",
500: i, symbols1[i], symbols2[i], prim_len);*/
1.66 anton 501: if (memcmp(symbols1[i],symbols2[i],prim_len)!=0) {
1.47 anton 502: if (debug)
503: fprintf(stderr,"Primitive %d not relocatable: memcmp(%p, %p, %d)\n",
504: i, symbols1[i], symbols2[i], prim_len);
505: } else {
506: pi->start = symbols1[i];
507: if (debug)
508: fprintf(stderr,"Primitive %d relocatable: start %p, length %ld, super_end %d\n",
509: i, pi->start, pi->length, pi->super_end);
510: }
1.48 anton 511: }
512: #endif
513: }
514:
515: Label compile_prim(Label prim)
516: {
1.61 anton 517: #if defined(DOUBLY_INDIRECT)
1.54 anton 518: if (prim<((Label)(xts+DOESJUMP)) || prim>((Label)(xts+npriminfos))) {
519: fprintf(stderr,"compile_prim encountered xt %p\n", prim);
520: return prim;
521: } else
522: return prim-((Label)xts)+((Label)vm_prims);
1.66 anton 523: #elif defined(IND_JUMP_LENGTH) && !defined(VM_PROFILING) && !defined(INDIRECT_THREADED)
1.58 anton 524: unsigned i;
1.48 anton 525: Address old_code_here=code_here;
526: static Address last_jump=0;
527:
1.58 anton 528: i = ((Xt)prim)-vm_prims;
1.56 anton 529: prim = *(Xt)prim;
1.66 anton 530: if (no_dynamic)
531: return prim;
1.58 anton 532: if (i>=npriminfos || priminfos[i].start == 0) { /* not a relocatable prim */
533: if (last_jump) { /* make sure the last sequence is complete */
534: memcpy(code_here, last_jump, IND_JUMP_LENGTH);
535: code_here += IND_JUMP_LENGTH;
536: last_jump = 0;
1.65 anton 537: FLUSH_ICACHE(start_flush, code_here-start_flush);
538: start_flush=code_here;
1.48 anton 539: }
1.58 anton 540: return prim;
1.47 anton 541: }
1.58 anton 542: assert(priminfos[i].start = prim);
1.50 anton 543: #ifdef ALIGN_CODE
544: ALIGN_CODE;
545: #endif
1.48 anton 546: memcpy(code_here, (Address)prim, priminfos[i].length);
547: code_here += priminfos[i].length;
548: last_jump = (priminfos[i].super_end) ? 0 : (prim+priminfos[i].length);
1.65 anton 549: if (last_jump == 0) {
550: FLUSH_ICACHE(start_flush, code_here-start_flush);
551: start_flush=code_here;
552: }
1.48 anton 553: return (Label)old_code_here;
1.61 anton 554: #else /* !defined(DOUBLY_INDIRECT), no code replication */
555: #if !defined(INDIRECT_THREADED)
1.56 anton 556: prim = *(Xt)prim;
1.61 anton 557: #endif
1.50 anton 558: return prim;
1.54 anton 559: #endif /* !defined(DOUBLY_INDIRECT) */
1.47 anton 560: }
561:
1.59 anton 562: #ifdef PRINT_SUPER_LENGTHS
563: Cell prim_length(Cell prim)
564: {
565: return priminfos[prim+DOESJUMP+1].length;
566: }
567: #endif
568:
1.1 anton 569: Address loader(FILE *imagefile, char* filename)
570: /* returns the address of the image proper (after the preamble) */
571: {
572: ImageHeader header;
573: Address image;
574: Address imp; /* image+preamble */
1.17 anton 575: Char magic[8];
576: char magic7; /* size byte of magic number */
1.1 anton 577: Cell preamblesize=0;
1.6 pazsan 578: Cell data_offset = offset_image ? 56*sizeof(Cell) : 0;
1.1 anton 579: UCell check_sum;
1.15 pazsan 580: Cell ausize = ((RELINFOBITS == 8) ? 0 :
581: (RELINFOBITS == 16) ? 1 :
582: (RELINFOBITS == 32) ? 2 : 3);
583: Cell charsize = ((sizeof(Char) == 1) ? 0 :
584: (sizeof(Char) == 2) ? 1 :
585: (sizeof(Char) == 4) ? 2 : 3) + ausize;
586: Cell cellsize = ((sizeof(Cell) == 1) ? 0 :
587: (sizeof(Cell) == 2) ? 1 :
588: (sizeof(Cell) == 4) ? 2 : 3) + ausize;
1.21 anton 589: Cell sizebyte = (ausize << 5) + (charsize << 3) + (cellsize << 1) +
590: #ifdef WORDS_BIGENDIAN
591: 0
592: #else
593: 1
594: #endif
595: ;
1.1 anton 596:
1.43 anton 597: vm_prims = engine(0,0,0,0,0);
1.47 anton 598: check_prims(vm_prims);
1.1 anton 599: #ifndef DOUBLY_INDIRECT
1.59 anton 600: #ifdef PRINT_SUPER_LENGTHS
601: print_super_lengths();
602: #endif
1.43 anton 603: check_sum = checksum(vm_prims);
1.1 anton 604: #else /* defined(DOUBLY_INDIRECT) */
1.43 anton 605: check_sum = (UCell)vm_prims;
1.1 anton 606: #endif /* defined(DOUBLY_INDIRECT) */
1.10 pazsan 607:
608: do {
609: if(fread(magic,sizeof(Char),8,imagefile) < 8) {
1.15 pazsan 610: fprintf(stderr,"%s: image %s doesn't seem to be a Gforth (>=0.4) image.\n",
1.10 pazsan 611: progname, filename);
612: exit(1);
1.1 anton 613: }
1.10 pazsan 614: preamblesize+=8;
1.15 pazsan 615: } while(memcmp(magic,"Gforth2",7));
1.17 anton 616: magic7 = magic[7];
1.1 anton 617: if (debug) {
1.17 anton 618: magic[7]='\0';
1.21 anton 619: fprintf(stderr,"Magic found: %s ", magic);
620: print_sizes(magic7);
1.1 anton 621: }
622:
1.21 anton 623: if (magic7 != sizebyte)
624: {
625: fprintf(stderr,"This image is: ");
626: print_sizes(magic7);
627: fprintf(stderr,"whereas the machine is ");
628: print_sizes(sizebyte);
1.1 anton 629: exit(-2);
630: };
631:
632: fread((void *)&header,sizeof(ImageHeader),1,imagefile);
1.10 pazsan 633:
634: set_stack_sizes(&header);
1.1 anton 635:
636: #if HAVE_GETPAGESIZE
637: pagesize=getpagesize(); /* Linux/GNU libc offers this */
638: #elif HAVE_SYSCONF && defined(_SC_PAGESIZE)
639: pagesize=sysconf(_SC_PAGESIZE); /* POSIX.4 */
640: #elif PAGESIZE
641: pagesize=PAGESIZE; /* in limits.h according to Gallmeister's POSIX.4 book */
642: #endif
643: if (debug)
1.5 jwilke 644: fprintf(stderr,"pagesize=%ld\n",(unsigned long) pagesize);
1.1 anton 645:
1.34 anton 646: image = dict_alloc_read(imagefile, preamblesize+header.image_size,
647: preamblesize+dictsize, data_offset);
1.33 anton 648: imp=image+preamblesize;
1.57 anton 649: alloc_stacks((ImageHeader *)imp);
1.1 anton 650: if (clear_dictionary)
1.33 anton 651: memset(imp+header.image_size, 0, dictsize-header.image_size);
1.46 jwilke 652: if(header.base==0 || header.base == 0x100) {
1.1 anton 653: Cell reloc_size=((header.image_size-1)/sizeof(Cell))/8+1;
654: char reloc_bits[reloc_size];
1.33 anton 655: fseek(imagefile, preamblesize+header.image_size, SEEK_SET);
1.10 pazsan 656: fread(reloc_bits, 1, reloc_size, imagefile);
1.45 jwilke 657: relocate((Cell *)imp, reloc_bits, header.image_size, header.base, vm_prims);
1.1 anton 658: #if 0
659: { /* let's see what the relocator did */
660: FILE *snapshot=fopen("snapshot.fi","wb");
661: fwrite(image,1,imagesize,snapshot);
662: fclose(snapshot);
663: }
664: #endif
1.46 jwilke 665: }
666: else if(header.base!=imp) {
667: fprintf(stderr,"%s: Cannot load nonrelocatable image (compiled for address $%lx) at address $%lx\n",
668: progname, (unsigned long)header.base, (unsigned long)imp);
669: exit(1);
1.1 anton 670: }
671: if (header.checksum==0)
672: ((ImageHeader *)imp)->checksum=check_sum;
673: else if (header.checksum != check_sum) {
674: fprintf(stderr,"%s: Checksum of image ($%lx) does not match the executable ($%lx)\n",
675: progname, (unsigned long)(header.checksum),(unsigned long)check_sum);
676: exit(1);
677: }
1.53 anton 678: #ifdef DOUBLY_INDIRECT
679: ((ImageHeader *)imp)->xt_base = xts;
680: #endif
1.1 anton 681: fclose(imagefile);
682:
1.56 anton 683: /* unnecessary, except maybe for CODE words */
684: /* FLUSH_ICACHE(imp, header.image_size);*/
1.1 anton 685:
686: return imp;
687: }
688:
1.28 anton 689: /* index of last '/' or '\' in file, 0 if there is none. !! Hmm, could
690: be implemented with strrchr and the separator should be
691: OS-dependent */
1.1 anton 692: int onlypath(char *file)
1.10 pazsan 693: {
694: int i;
1.1 anton 695: i=strlen(file);
1.10 pazsan 696: while (i) {
697: if (file[i]=='\\' || file[i]=='/') break;
698: i--;
699: }
700: return i;
1.1 anton 701: }
702:
703: FILE *openimage(char *fullfilename)
1.10 pazsan 704: {
705: FILE *image_file;
1.28 anton 706: char * expfilename = tilde_cstr(fullfilename, strlen(fullfilename), 1);
1.10 pazsan 707:
1.28 anton 708: image_file=fopen(expfilename,"rb");
1.1 anton 709: if (image_file!=NULL && debug)
1.28 anton 710: fprintf(stderr, "Opened image file: %s\n", expfilename);
1.10 pazsan 711: return image_file;
1.1 anton 712: }
713:
1.28 anton 714: /* try to open image file concat(path[0:len],imagename) */
1.1 anton 715: FILE *checkimage(char *path, int len, char *imagename)
1.10 pazsan 716: {
717: int dirlen=len;
1.1 anton 718: char fullfilename[dirlen+strlen(imagename)+2];
1.10 pazsan 719:
1.1 anton 720: memcpy(fullfilename, path, dirlen);
721: if (fullfilename[dirlen-1]!='/')
722: fullfilename[dirlen++]='/';
723: strcpy(fullfilename+dirlen,imagename);
1.10 pazsan 724: return openimage(fullfilename);
1.1 anton 725: }
726:
1.10 pazsan 727: FILE * open_image_file(char * imagename, char * path)
1.1 anton 728: {
1.10 pazsan 729: FILE * image_file=NULL;
1.28 anton 730: char *origpath=path;
1.10 pazsan 731:
732: if(strchr(imagename, '/')==NULL) {
733: /* first check the directory where the exe file is in !! 01may97jaw */
734: if (onlypath(progname))
735: image_file=checkimage(progname, onlypath(progname), imagename);
736: if (!image_file)
737: do {
738: char *pend=strchr(path, PATHSEP);
739: if (pend==NULL)
740: pend=path+strlen(path);
741: if (strlen(path)==0) break;
742: image_file=checkimage(path, pend-path, imagename);
743: path=pend+(*pend==PATHSEP);
744: } while (image_file==NULL);
745: } else {
746: image_file=openimage(imagename);
747: }
1.1 anton 748:
1.10 pazsan 749: if (!image_file) {
750: fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n",
1.28 anton 751: progname, imagename, origpath);
1.10 pazsan 752: exit(1);
1.7 anton 753: }
754:
1.10 pazsan 755: return image_file;
756: }
1.11 pazsan 757: #endif
758:
759: #ifdef HAS_OS
760: UCell convsize(char *s, UCell elemsize)
761: /* converts s of the format [0-9]+[bekMGT]? (e.g. 25k) into the number
762: of bytes. the letter at the end indicates the unit, where e stands
763: for the element size. default is e */
764: {
765: char *endp;
766: UCell n,m;
767:
768: m = elemsize;
769: n = strtoul(s,&endp,0);
770: if (endp!=NULL) {
771: if (strcmp(endp,"b")==0)
772: m=1;
773: else if (strcmp(endp,"k")==0)
774: m=1024;
775: else if (strcmp(endp,"M")==0)
776: m=1024*1024;
777: else if (strcmp(endp,"G")==0)
778: m=1024*1024*1024;
779: else if (strcmp(endp,"T")==0) {
780: #if (SIZEOF_CHAR_P > 4)
1.24 anton 781: m=1024L*1024*1024*1024;
1.11 pazsan 782: #else
783: fprintf(stderr,"%s: size specification \"%s\" too large for this machine\n", progname, endp);
784: exit(1);
785: #endif
786: } else if (strcmp(endp,"e")!=0 && strcmp(endp,"")!=0) {
787: fprintf(stderr,"%s: cannot grok size specification %s: invalid unit \"%s\"\n", progname, s, endp);
788: exit(1);
789: }
790: }
791: return n*m;
792: }
1.10 pazsan 793:
794: void gforth_args(int argc, char ** argv, char ** path, char ** imagename)
795: {
796: int c;
797:
1.1 anton 798: opterr=0;
799: while (1) {
800: int option_index=0;
801: static struct option opts[] = {
1.29 anton 802: {"appl-image", required_argument, NULL, 'a'},
1.1 anton 803: {"image-file", required_argument, NULL, 'i'},
804: {"dictionary-size", required_argument, NULL, 'm'},
805: {"data-stack-size", required_argument, NULL, 'd'},
806: {"return-stack-size", required_argument, NULL, 'r'},
807: {"fp-stack-size", required_argument, NULL, 'f'},
808: {"locals-stack-size", required_argument, NULL, 'l'},
809: {"path", required_argument, NULL, 'p'},
810: {"version", no_argument, NULL, 'v'},
811: {"help", no_argument, NULL, 'h'},
812: /* put something != 0 into offset_image */
813: {"offset-image", no_argument, &offset_image, 1},
814: {"no-offset-im", no_argument, &offset_image, 0},
815: {"clear-dictionary", no_argument, &clear_dictionary, 1},
1.4 anton 816: {"die-on-signal", no_argument, &die_on_signal, 1},
1.1 anton 817: {"debug", no_argument, &debug, 1},
1.60 anton 818: {"no-super", no_argument, &no_super, 1},
819: {"no-dynamic", no_argument, &no_dynamic, 1},
1.66 anton 820: {"dynamic", no_argument, &no_dynamic, 0},
1.1 anton 821: {0,0,0,0}
822: /* no-init-file, no-rc? */
823: };
824:
1.36 pazsan 825: c = getopt_long(argc, argv, "+i:m:d:r:f:l:p:vhoncsx", opts, &option_index);
1.1 anton 826:
827: switch (c) {
1.29 anton 828: case EOF: return;
829: case '?': optind--; return;
830: case 'a': *imagename = optarg; return;
1.10 pazsan 831: case 'i': *imagename = optarg; break;
1.1 anton 832: case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
833: case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
834: case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
835: case 'f': fsize = convsize(optarg,sizeof(Float)); break;
836: case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
1.10 pazsan 837: case 'p': *path = optarg; break;
1.36 pazsan 838: case 'o': offset_image = 1; break;
839: case 'n': offset_image = 0; break;
840: case 'c': clear_dictionary = 1; break;
841: case 's': die_on_signal = 1; break;
842: case 'x': debug = 1; break;
1.8 anton 843: case 'v': fprintf(stderr, "gforth %s\n", VERSION); exit(0);
1.1 anton 844: case 'h':
1.29 anton 845: fprintf(stderr, "Usage: %s [engine options] ['--'] [image arguments]\n\
1.1 anton 846: Engine Options:\n\
1.29 anton 847: --appl-image FILE equivalent to '--image-file=FILE --'\n\
1.10 pazsan 848: --clear-dictionary Initialize the dictionary with 0 bytes\n\
849: -d SIZE, --data-stack-size=SIZE Specify data stack size\n\
850: --debug Print debugging information during startup\n\
851: --die-on-signal exit instead of CATCHing some signals\n\
1.66 anton 852: --dynamic use dynamic native code\n\
1.10 pazsan 853: -f SIZE, --fp-stack-size=SIZE Specify floating point stack size\n\
854: -h, --help Print this message and exit\n\
855: -i FILE, --image-file=FILE Use image FILE instead of `gforth.fi'\n\
856: -l SIZE, --locals-stack-size=SIZE Specify locals stack size\n\
857: -m SIZE, --dictionary-size=SIZE Specify Forth dictionary size\n\
1.60 anton 858: --no-dynamic Use only statically compiled primitives\n\
1.10 pazsan 859: --no-offset-im Load image at normal position\n\
1.60 anton 860: --no-super No dynamically formed superinstructions\n\
1.10 pazsan 861: --offset-image Load image at a different position\n\
862: -p PATH, --path=PATH Search path for finding image and sources\n\
863: -r SIZE, --return-stack-size=SIZE Specify return stack size\n\
1.66 anton 864: -v, --version Print engine version and exit\n\
1.1 anton 865: SIZE arguments consist of an integer followed by a unit. The unit can be\n\
1.10 pazsan 866: `b' (byte), `e' (element; default), `k' (KB), `M' (MB), `G' (GB) or `T' (TB).\n",
867: argv[0]);
868: optind--;
869: return;
1.1 anton 870: }
871: }
1.10 pazsan 872: }
1.11 pazsan 873: #endif
1.10 pazsan 874:
875: #ifdef INCLUDE_IMAGE
876: extern Cell image[];
877: extern const char reloc_bits[];
878: #endif
879:
1.67 pazsan 880: DCell double2ll(Float r)
881: {
882: #ifndef BUGGY_LONG_LONG
883: return (DCell)(r);
884: #else
885: DCell d;
886: d.hi = ldexp(r,-(int)(CELL_BITS)) - (r<0);
887: d.lo = r-ldexp((Float)d.hi,CELL_BITS);
888: return d;
889: #endif
890: }
891:
1.10 pazsan 892: int main(int argc, char **argv, char **env)
893: {
1.30 pazsan 894: #ifdef HAS_OS
1.10 pazsan 895: char *path = getenv("GFORTHPATH") ? : DEFAULTPATH;
1.30 pazsan 896: #else
897: char *path = DEFAULTPATH;
898: #endif
1.13 pazsan 899: #ifndef INCLUDE_IMAGE
1.10 pazsan 900: char *imagename="gforth.fi";
901: FILE *image_file;
902: Address image;
903: #endif
904: int retvalue;
905:
1.56 anton 906: #if defined(i386) && defined(ALIGNMENT_CHECK)
1.10 pazsan 907: /* turn on alignment checks on the 486.
908: * on the 386 this should have no effect. */
909: __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
910: /* this is unusable with Linux' libc.4.6.27, because this library is
911: not alignment-clean; we would have to replace some library
912: functions (e.g., memcpy) to make it work. Also GCC doesn't try to keep
913: the stack FP-aligned. */
914: #endif
915:
916: /* buffering of the user output device */
1.11 pazsan 917: #ifdef _IONBF
1.10 pazsan 918: if (isatty(fileno(stdout))) {
919: fflush(stdout);
920: setvbuf(stdout,NULL,_IONBF,0);
1.1 anton 921: }
1.11 pazsan 922: #endif
1.1 anton 923:
1.10 pazsan 924: progname = argv[0];
925:
1.11 pazsan 926: #ifdef HAS_OS
1.10 pazsan 927: gforth_args(argc, argv, &path, &imagename);
1.11 pazsan 928: #endif
1.10 pazsan 929:
930: #ifdef INCLUDE_IMAGE
931: set_stack_sizes((ImageHeader *)image);
1.22 pazsan 932: if(((ImageHeader *)image)->base != image)
933: relocate(image, reloc_bits, ((ImageHeader *)image)->image_size,
934: (Label*)engine(0, 0, 0, 0, 0));
1.10 pazsan 935: alloc_stacks((ImageHeader *)image);
936: #else
937: image_file = open_image_file(imagename, path);
938: image = loader(image_file, imagename);
939: #endif
1.24 anton 940: gforth_header=(ImageHeader *)image; /* used in SIGSEGV handler */
1.1 anton 941:
942: {
1.10 pazsan 943: char path2[strlen(path)+1];
1.1 anton 944: char *p1, *p2;
945: Cell environ[]= {
946: (Cell)argc-(optind-1),
947: (Cell)(argv+(optind-1)),
1.10 pazsan 948: (Cell)strlen(path),
1.1 anton 949: (Cell)path2};
950: argv[optind-1] = progname;
951: /*
952: for (i=0; i<environ[0]; i++)
953: printf("%s\n", ((char **)(environ[1]))[i]);
954: */
955: /* make path OS-independent by replacing path separators with NUL */
1.10 pazsan 956: for (p1=path, p2=path2; *p1!='\0'; p1++, p2++)
1.1 anton 957: if (*p1==PATHSEP)
958: *p2 = '\0';
959: else
960: *p2 = *p1;
961: *p2='\0';
1.10 pazsan 962: retvalue = go_forth(image, 4, environ);
1.42 anton 963: #ifdef VM_PROFILING
964: vm_print_profile(stderr);
965: #endif
1.1 anton 966: deprep_terminal();
967: }
1.13 pazsan 968: return retvalue;
1.1 anton 969: }
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