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