Annotation of gforth/engine/main.c, revision 1.69
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:
1.69 ! anton 444: #ifndef NO_DYNAMIC
1.47 anton 445: typedef struct {
446: Label start;
447: Cell length; /* excluding the jump */
448: char super_end; /* true if primitive ends superinstruction, i.e.,
449: unconditional branch, execute, etc. */
450: } PrimInfo;
451:
452: PrimInfo *priminfos;
1.69 ! anton 453: #endif /* defined(NO_DYNAMIC) */
1.48 anton 454: Cell npriminfos=0;
1.47 anton 455:
1.69 ! anton 456:
1.47 anton 457: void check_prims(Label symbols1[])
458: {
459: int i;
1.55 anton 460: Label *symbols2;
1.49 anton 461: static char superend[]={
1.48 anton 462: #include "prim_superend.i"
463: };
1.47 anton 464:
1.66 anton 465: if (debug)
466: #ifdef __VERSION__
467: fprintf(stderr, "Compiled with gcc-" __VERSION__ "\n");
468: #else
469: #define xstr(s) str(s)
470: #define str(s) #s
471: fprintf(stderr, "Compiled with gcc-" xstr(__GNUC__) "." xstr(__GNUC_MINOR__) "\n");
472: #endif
1.47 anton 473: for (i=DOESJUMP+1; symbols1[i+1]!=0; i++)
474: ;
1.55 anton 475: npriminfos = i;
476:
1.69 ! anton 477: #if defined(IS_NEXT_JUMP) && !defined(NO_DYNAMIC)
1.66 anton 478: if (no_dynamic)
479: return;
1.55 anton 480: symbols2=engine2(0,0,0,0,0);
1.47 anton 481: priminfos = calloc(i,sizeof(PrimInfo));
482: for (i=DOESJUMP+1; symbols1[i+1]!=0; i++) {
483: int prim_len=symbols1[i+1]-symbols1[i];
484: PrimInfo *pi=&priminfos[i];
485: int j;
1.60 anton 486: pi->super_end = superend[i-DOESJUMP-1]|no_super;
1.50 anton 487: for (j=prim_len-IND_JUMP_LENGTH; ; j--) {
488: if (IS_NEXT_JUMP(symbols1[i]+j)) {
1.47 anton 489: prim_len = j;
1.48 anton 490: if (pi->super_end)
1.50 anton 491: prim_len += IND_JUMP_LENGTH; /* include the jump */
1.47 anton 492: break;
493: }
494: if (j==0) { /* NEXT jump not found, e.g., execute */
1.48 anton 495: if (!pi->super_end && debug)
496: fprintf(stderr, "NEXT jump not found for primitive %d, making it super_end\n", i);
497: pi->super_end = 1;
1.47 anton 498: break;
499: }
500: }
1.59 anton 501: pi->length = prim_len;
1.47 anton 502: /* fprintf(stderr,"checking primitive %d: memcmp(%p, %p, %d)\n",
503: i, symbols1[i], symbols2[i], prim_len);*/
1.66 anton 504: if (memcmp(symbols1[i],symbols2[i],prim_len)!=0) {
1.47 anton 505: if (debug)
506: fprintf(stderr,"Primitive %d not relocatable: memcmp(%p, %p, %d)\n",
507: i, symbols1[i], symbols2[i], prim_len);
508: } else {
509: pi->start = symbols1[i];
510: if (debug)
511: fprintf(stderr,"Primitive %d relocatable: start %p, length %ld, super_end %d\n",
512: i, pi->start, pi->length, pi->super_end);
513: }
1.48 anton 514: }
515: #endif
516: }
517:
518: Label compile_prim(Label prim)
519: {
1.61 anton 520: #if defined(DOUBLY_INDIRECT)
1.54 anton 521: if (prim<((Label)(xts+DOESJUMP)) || prim>((Label)(xts+npriminfos))) {
522: fprintf(stderr,"compile_prim encountered xt %p\n", prim);
523: return prim;
524: } else
525: return prim-((Label)xts)+((Label)vm_prims);
1.69 ! anton 526: #elif defined(IND_JUMP_LENGTH) && !defined(NO_DYNAMIC)
1.58 anton 527: unsigned i;
1.48 anton 528: Address old_code_here=code_here;
529: static Address last_jump=0;
530:
1.58 anton 531: i = ((Xt)prim)-vm_prims;
1.56 anton 532: prim = *(Xt)prim;
1.66 anton 533: if (no_dynamic)
534: return prim;
1.58 anton 535: if (i>=npriminfos || priminfos[i].start == 0) { /* not a relocatable prim */
536: if (last_jump) { /* make sure the last sequence is complete */
537: memcpy(code_here, last_jump, IND_JUMP_LENGTH);
538: code_here += IND_JUMP_LENGTH;
539: last_jump = 0;
1.65 anton 540: FLUSH_ICACHE(start_flush, code_here-start_flush);
541: start_flush=code_here;
1.48 anton 542: }
1.58 anton 543: return prim;
1.47 anton 544: }
1.58 anton 545: assert(priminfos[i].start = prim);
1.50 anton 546: #ifdef ALIGN_CODE
547: ALIGN_CODE;
548: #endif
1.48 anton 549: memcpy(code_here, (Address)prim, priminfos[i].length);
550: code_here += priminfos[i].length;
551: last_jump = (priminfos[i].super_end) ? 0 : (prim+priminfos[i].length);
1.65 anton 552: if (last_jump == 0) {
553: FLUSH_ICACHE(start_flush, code_here-start_flush);
554: start_flush=code_here;
555: }
1.48 anton 556: return (Label)old_code_here;
1.61 anton 557: #else /* !defined(DOUBLY_INDIRECT), no code replication */
558: #if !defined(INDIRECT_THREADED)
1.56 anton 559: prim = *(Xt)prim;
1.61 anton 560: #endif
1.50 anton 561: return prim;
1.54 anton 562: #endif /* !defined(DOUBLY_INDIRECT) */
1.47 anton 563: }
564:
1.69 ! anton 565: #if defined(PRINT_SUPER_LENGTHS) && !defined(NO_DYNAMIC)
1.59 anton 566: Cell prim_length(Cell prim)
567: {
568: return priminfos[prim+DOESJUMP+1].length;
569: }
570: #endif
571:
1.1 anton 572: Address loader(FILE *imagefile, char* filename)
573: /* returns the address of the image proper (after the preamble) */
574: {
575: ImageHeader header;
576: Address image;
577: Address imp; /* image+preamble */
1.17 anton 578: Char magic[8];
579: char magic7; /* size byte of magic number */
1.1 anton 580: Cell preamblesize=0;
1.6 pazsan 581: Cell data_offset = offset_image ? 56*sizeof(Cell) : 0;
1.1 anton 582: UCell check_sum;
1.15 pazsan 583: Cell ausize = ((RELINFOBITS == 8) ? 0 :
584: (RELINFOBITS == 16) ? 1 :
585: (RELINFOBITS == 32) ? 2 : 3);
586: Cell charsize = ((sizeof(Char) == 1) ? 0 :
587: (sizeof(Char) == 2) ? 1 :
588: (sizeof(Char) == 4) ? 2 : 3) + ausize;
589: Cell cellsize = ((sizeof(Cell) == 1) ? 0 :
590: (sizeof(Cell) == 2) ? 1 :
591: (sizeof(Cell) == 4) ? 2 : 3) + ausize;
1.21 anton 592: Cell sizebyte = (ausize << 5) + (charsize << 3) + (cellsize << 1) +
593: #ifdef WORDS_BIGENDIAN
594: 0
595: #else
596: 1
597: #endif
598: ;
1.1 anton 599:
1.43 anton 600: vm_prims = engine(0,0,0,0,0);
1.47 anton 601: check_prims(vm_prims);
1.1 anton 602: #ifndef DOUBLY_INDIRECT
1.59 anton 603: #ifdef PRINT_SUPER_LENGTHS
604: print_super_lengths();
605: #endif
1.43 anton 606: check_sum = checksum(vm_prims);
1.1 anton 607: #else /* defined(DOUBLY_INDIRECT) */
1.43 anton 608: check_sum = (UCell)vm_prims;
1.1 anton 609: #endif /* defined(DOUBLY_INDIRECT) */
1.10 pazsan 610:
611: do {
612: if(fread(magic,sizeof(Char),8,imagefile) < 8) {
1.15 pazsan 613: fprintf(stderr,"%s: image %s doesn't seem to be a Gforth (>=0.4) image.\n",
1.10 pazsan 614: progname, filename);
615: exit(1);
1.1 anton 616: }
1.10 pazsan 617: preamblesize+=8;
1.15 pazsan 618: } while(memcmp(magic,"Gforth2",7));
1.17 anton 619: magic7 = magic[7];
1.1 anton 620: if (debug) {
1.17 anton 621: magic[7]='\0';
1.21 anton 622: fprintf(stderr,"Magic found: %s ", magic);
623: print_sizes(magic7);
1.1 anton 624: }
625:
1.21 anton 626: if (magic7 != sizebyte)
627: {
628: fprintf(stderr,"This image is: ");
629: print_sizes(magic7);
630: fprintf(stderr,"whereas the machine is ");
631: print_sizes(sizebyte);
1.1 anton 632: exit(-2);
633: };
634:
635: fread((void *)&header,sizeof(ImageHeader),1,imagefile);
1.10 pazsan 636:
637: set_stack_sizes(&header);
1.1 anton 638:
639: #if HAVE_GETPAGESIZE
640: pagesize=getpagesize(); /* Linux/GNU libc offers this */
641: #elif HAVE_SYSCONF && defined(_SC_PAGESIZE)
642: pagesize=sysconf(_SC_PAGESIZE); /* POSIX.4 */
643: #elif PAGESIZE
644: pagesize=PAGESIZE; /* in limits.h according to Gallmeister's POSIX.4 book */
645: #endif
646: if (debug)
1.5 jwilke 647: fprintf(stderr,"pagesize=%ld\n",(unsigned long) pagesize);
1.1 anton 648:
1.34 anton 649: image = dict_alloc_read(imagefile, preamblesize+header.image_size,
650: preamblesize+dictsize, data_offset);
1.33 anton 651: imp=image+preamblesize;
1.57 anton 652: alloc_stacks((ImageHeader *)imp);
1.1 anton 653: if (clear_dictionary)
1.33 anton 654: memset(imp+header.image_size, 0, dictsize-header.image_size);
1.46 jwilke 655: if(header.base==0 || header.base == 0x100) {
1.1 anton 656: Cell reloc_size=((header.image_size-1)/sizeof(Cell))/8+1;
657: char reloc_bits[reloc_size];
1.33 anton 658: fseek(imagefile, preamblesize+header.image_size, SEEK_SET);
1.10 pazsan 659: fread(reloc_bits, 1, reloc_size, imagefile);
1.45 jwilke 660: relocate((Cell *)imp, reloc_bits, header.image_size, header.base, vm_prims);
1.1 anton 661: #if 0
662: { /* let's see what the relocator did */
663: FILE *snapshot=fopen("snapshot.fi","wb");
664: fwrite(image,1,imagesize,snapshot);
665: fclose(snapshot);
666: }
667: #endif
1.46 jwilke 668: }
669: else if(header.base!=imp) {
670: fprintf(stderr,"%s: Cannot load nonrelocatable image (compiled for address $%lx) at address $%lx\n",
671: progname, (unsigned long)header.base, (unsigned long)imp);
672: exit(1);
1.1 anton 673: }
674: if (header.checksum==0)
675: ((ImageHeader *)imp)->checksum=check_sum;
676: else if (header.checksum != check_sum) {
677: fprintf(stderr,"%s: Checksum of image ($%lx) does not match the executable ($%lx)\n",
678: progname, (unsigned long)(header.checksum),(unsigned long)check_sum);
679: exit(1);
680: }
1.53 anton 681: #ifdef DOUBLY_INDIRECT
682: ((ImageHeader *)imp)->xt_base = xts;
683: #endif
1.1 anton 684: fclose(imagefile);
685:
1.56 anton 686: /* unnecessary, except maybe for CODE words */
687: /* FLUSH_ICACHE(imp, header.image_size);*/
1.1 anton 688:
689: return imp;
690: }
691:
1.28 anton 692: /* index of last '/' or '\' in file, 0 if there is none. !! Hmm, could
693: be implemented with strrchr and the separator should be
694: OS-dependent */
1.1 anton 695: int onlypath(char *file)
1.10 pazsan 696: {
697: int i;
1.1 anton 698: i=strlen(file);
1.10 pazsan 699: while (i) {
700: if (file[i]=='\\' || file[i]=='/') break;
701: i--;
702: }
703: return i;
1.1 anton 704: }
705:
706: FILE *openimage(char *fullfilename)
1.10 pazsan 707: {
708: FILE *image_file;
1.28 anton 709: char * expfilename = tilde_cstr(fullfilename, strlen(fullfilename), 1);
1.10 pazsan 710:
1.28 anton 711: image_file=fopen(expfilename,"rb");
1.1 anton 712: if (image_file!=NULL && debug)
1.28 anton 713: fprintf(stderr, "Opened image file: %s\n", expfilename);
1.10 pazsan 714: return image_file;
1.1 anton 715: }
716:
1.28 anton 717: /* try to open image file concat(path[0:len],imagename) */
1.1 anton 718: FILE *checkimage(char *path, int len, char *imagename)
1.10 pazsan 719: {
720: int dirlen=len;
1.1 anton 721: char fullfilename[dirlen+strlen(imagename)+2];
1.10 pazsan 722:
1.1 anton 723: memcpy(fullfilename, path, dirlen);
724: if (fullfilename[dirlen-1]!='/')
725: fullfilename[dirlen++]='/';
726: strcpy(fullfilename+dirlen,imagename);
1.10 pazsan 727: return openimage(fullfilename);
1.1 anton 728: }
729:
1.10 pazsan 730: FILE * open_image_file(char * imagename, char * path)
1.1 anton 731: {
1.10 pazsan 732: FILE * image_file=NULL;
1.28 anton 733: char *origpath=path;
1.10 pazsan 734:
735: if(strchr(imagename, '/')==NULL) {
736: /* first check the directory where the exe file is in !! 01may97jaw */
737: if (onlypath(progname))
738: image_file=checkimage(progname, onlypath(progname), imagename);
739: if (!image_file)
740: do {
741: char *pend=strchr(path, PATHSEP);
742: if (pend==NULL)
743: pend=path+strlen(path);
744: if (strlen(path)==0) break;
745: image_file=checkimage(path, pend-path, imagename);
746: path=pend+(*pend==PATHSEP);
747: } while (image_file==NULL);
748: } else {
749: image_file=openimage(imagename);
750: }
1.1 anton 751:
1.10 pazsan 752: if (!image_file) {
753: fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n",
1.28 anton 754: progname, imagename, origpath);
1.10 pazsan 755: exit(1);
1.7 anton 756: }
757:
1.10 pazsan 758: return image_file;
759: }
1.11 pazsan 760: #endif
761:
762: #ifdef HAS_OS
763: UCell convsize(char *s, UCell elemsize)
764: /* converts s of the format [0-9]+[bekMGT]? (e.g. 25k) into the number
765: of bytes. the letter at the end indicates the unit, where e stands
766: for the element size. default is e */
767: {
768: char *endp;
769: UCell n,m;
770:
771: m = elemsize;
772: n = strtoul(s,&endp,0);
773: if (endp!=NULL) {
774: if (strcmp(endp,"b")==0)
775: m=1;
776: else if (strcmp(endp,"k")==0)
777: m=1024;
778: else if (strcmp(endp,"M")==0)
779: m=1024*1024;
780: else if (strcmp(endp,"G")==0)
781: m=1024*1024*1024;
782: else if (strcmp(endp,"T")==0) {
783: #if (SIZEOF_CHAR_P > 4)
1.24 anton 784: m=1024L*1024*1024*1024;
1.11 pazsan 785: #else
786: fprintf(stderr,"%s: size specification \"%s\" too large for this machine\n", progname, endp);
787: exit(1);
788: #endif
789: } else if (strcmp(endp,"e")!=0 && strcmp(endp,"")!=0) {
790: fprintf(stderr,"%s: cannot grok size specification %s: invalid unit \"%s\"\n", progname, s, endp);
791: exit(1);
792: }
793: }
794: return n*m;
795: }
1.10 pazsan 796:
797: void gforth_args(int argc, char ** argv, char ** path, char ** imagename)
798: {
799: int c;
800:
1.1 anton 801: opterr=0;
802: while (1) {
803: int option_index=0;
804: static struct option opts[] = {
1.29 anton 805: {"appl-image", required_argument, NULL, 'a'},
1.1 anton 806: {"image-file", required_argument, NULL, 'i'},
807: {"dictionary-size", required_argument, NULL, 'm'},
808: {"data-stack-size", required_argument, NULL, 'd'},
809: {"return-stack-size", required_argument, NULL, 'r'},
810: {"fp-stack-size", required_argument, NULL, 'f'},
811: {"locals-stack-size", required_argument, NULL, 'l'},
812: {"path", required_argument, NULL, 'p'},
813: {"version", no_argument, NULL, 'v'},
814: {"help", no_argument, NULL, 'h'},
815: /* put something != 0 into offset_image */
816: {"offset-image", no_argument, &offset_image, 1},
817: {"no-offset-im", no_argument, &offset_image, 0},
818: {"clear-dictionary", no_argument, &clear_dictionary, 1},
1.4 anton 819: {"die-on-signal", no_argument, &die_on_signal, 1},
1.1 anton 820: {"debug", no_argument, &debug, 1},
1.60 anton 821: {"no-super", no_argument, &no_super, 1},
822: {"no-dynamic", no_argument, &no_dynamic, 1},
1.66 anton 823: {"dynamic", no_argument, &no_dynamic, 0},
1.1 anton 824: {0,0,0,0}
825: /* no-init-file, no-rc? */
826: };
827:
1.36 pazsan 828: c = getopt_long(argc, argv, "+i:m:d:r:f:l:p:vhoncsx", opts, &option_index);
1.1 anton 829:
830: switch (c) {
1.29 anton 831: case EOF: return;
832: case '?': optind--; return;
833: case 'a': *imagename = optarg; return;
1.10 pazsan 834: case 'i': *imagename = optarg; break;
1.1 anton 835: case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
836: case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
837: case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
838: case 'f': fsize = convsize(optarg,sizeof(Float)); break;
839: case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
1.10 pazsan 840: case 'p': *path = optarg; break;
1.36 pazsan 841: case 'o': offset_image = 1; break;
842: case 'n': offset_image = 0; break;
843: case 'c': clear_dictionary = 1; break;
844: case 's': die_on_signal = 1; break;
845: case 'x': debug = 1; break;
1.8 anton 846: case 'v': fprintf(stderr, "gforth %s\n", VERSION); exit(0);
1.1 anton 847: case 'h':
1.29 anton 848: fprintf(stderr, "Usage: %s [engine options] ['--'] [image arguments]\n\
1.1 anton 849: Engine Options:\n\
1.29 anton 850: --appl-image FILE equivalent to '--image-file=FILE --'\n\
1.10 pazsan 851: --clear-dictionary Initialize the dictionary with 0 bytes\n\
852: -d SIZE, --data-stack-size=SIZE Specify data stack size\n\
853: --debug Print debugging information during startup\n\
854: --die-on-signal exit instead of CATCHing some signals\n\
1.66 anton 855: --dynamic use dynamic native code\n\
1.10 pazsan 856: -f SIZE, --fp-stack-size=SIZE Specify floating point stack size\n\
857: -h, --help Print this message and exit\n\
858: -i FILE, --image-file=FILE Use image FILE instead of `gforth.fi'\n\
859: -l SIZE, --locals-stack-size=SIZE Specify locals stack size\n\
860: -m SIZE, --dictionary-size=SIZE Specify Forth dictionary size\n\
1.60 anton 861: --no-dynamic Use only statically compiled primitives\n\
1.10 pazsan 862: --no-offset-im Load image at normal position\n\
1.60 anton 863: --no-super No dynamically formed superinstructions\n\
1.10 pazsan 864: --offset-image Load image at a different position\n\
865: -p PATH, --path=PATH Search path for finding image and sources\n\
866: -r SIZE, --return-stack-size=SIZE Specify return stack size\n\
1.66 anton 867: -v, --version Print engine version and exit\n\
1.1 anton 868: SIZE arguments consist of an integer followed by a unit. The unit can be\n\
1.10 pazsan 869: `b' (byte), `e' (element; default), `k' (KB), `M' (MB), `G' (GB) or `T' (TB).\n",
870: argv[0]);
871: optind--;
872: return;
1.1 anton 873: }
874: }
1.10 pazsan 875: }
1.11 pazsan 876: #endif
1.10 pazsan 877:
878: #ifdef INCLUDE_IMAGE
879: extern Cell image[];
880: extern const char reloc_bits[];
881: #endif
882:
1.67 pazsan 883: DCell double2ll(Float r)
884: {
885: #ifndef BUGGY_LONG_LONG
886: return (DCell)(r);
887: #else
888: DCell d;
889: d.hi = ldexp(r,-(int)(CELL_BITS)) - (r<0);
890: d.lo = r-ldexp((Float)d.hi,CELL_BITS);
891: return d;
892: #endif
893: }
894:
1.10 pazsan 895: int main(int argc, char **argv, char **env)
896: {
1.30 pazsan 897: #ifdef HAS_OS
1.10 pazsan 898: char *path = getenv("GFORTHPATH") ? : DEFAULTPATH;
1.30 pazsan 899: #else
900: char *path = DEFAULTPATH;
901: #endif
1.13 pazsan 902: #ifndef INCLUDE_IMAGE
1.10 pazsan 903: char *imagename="gforth.fi";
904: FILE *image_file;
905: Address image;
906: #endif
907: int retvalue;
908:
1.56 anton 909: #if defined(i386) && defined(ALIGNMENT_CHECK)
1.10 pazsan 910: /* turn on alignment checks on the 486.
911: * on the 386 this should have no effect. */
912: __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
913: /* this is unusable with Linux' libc.4.6.27, because this library is
914: not alignment-clean; we would have to replace some library
915: functions (e.g., memcpy) to make it work. Also GCC doesn't try to keep
916: the stack FP-aligned. */
917: #endif
918:
919: /* buffering of the user output device */
1.11 pazsan 920: #ifdef _IONBF
1.10 pazsan 921: if (isatty(fileno(stdout))) {
922: fflush(stdout);
923: setvbuf(stdout,NULL,_IONBF,0);
1.1 anton 924: }
1.11 pazsan 925: #endif
1.1 anton 926:
1.10 pazsan 927: progname = argv[0];
928:
1.11 pazsan 929: #ifdef HAS_OS
1.10 pazsan 930: gforth_args(argc, argv, &path, &imagename);
1.11 pazsan 931: #endif
1.10 pazsan 932:
933: #ifdef INCLUDE_IMAGE
934: set_stack_sizes((ImageHeader *)image);
1.22 pazsan 935: if(((ImageHeader *)image)->base != image)
936: relocate(image, reloc_bits, ((ImageHeader *)image)->image_size,
937: (Label*)engine(0, 0, 0, 0, 0));
1.10 pazsan 938: alloc_stacks((ImageHeader *)image);
939: #else
940: image_file = open_image_file(imagename, path);
941: image = loader(image_file, imagename);
942: #endif
1.24 anton 943: gforth_header=(ImageHeader *)image; /* used in SIGSEGV handler */
1.1 anton 944:
945: {
1.10 pazsan 946: char path2[strlen(path)+1];
1.1 anton 947: char *p1, *p2;
948: Cell environ[]= {
949: (Cell)argc-(optind-1),
950: (Cell)(argv+(optind-1)),
1.10 pazsan 951: (Cell)strlen(path),
1.1 anton 952: (Cell)path2};
953: argv[optind-1] = progname;
954: /*
955: for (i=0; i<environ[0]; i++)
956: printf("%s\n", ((char **)(environ[1]))[i]);
957: */
958: /* make path OS-independent by replacing path separators with NUL */
1.10 pazsan 959: for (p1=path, p2=path2; *p1!='\0'; p1++, p2++)
1.1 anton 960: if (*p1==PATHSEP)
961: *p2 = '\0';
962: else
963: *p2 = *p1;
964: *p2='\0';
1.10 pazsan 965: retvalue = go_forth(image, 4, environ);
1.42 anton 966: #ifdef VM_PROFILING
967: vm_print_profile(stderr);
968: #endif
1.1 anton 969: deprep_terminal();
970: }
1.13 pazsan 971: return retvalue;
1.1 anton 972: }
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