1: /* command line interpretation, image loading etc. for Gforth
2:
3:
4: Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.
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
20: Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21: */
22:
23: #include "config.h"
24: #include <errno.h>
25: #include <ctype.h>
26: #include <stdio.h>
27: #include <unistd.h>
28: #include <string.h>
29: #include <math.h>
30: #include <sys/types.h>
31: #include <sys/stat.h>
32: #include <fcntl.h>
33: #include <assert.h>
34: #include <stdlib.h>
35: #ifndef STANDALONE
36: #if HAVE_SYS_MMAN_H
37: #include <sys/mman.h>
38: #endif
39: #endif
40: #include "forth.h"
41: #include "io.h"
42: #include "getopt.h"
43: #ifdef STANDALONE
44: #include <systypes.h>
45: #endif
46:
47: #define PRIM_VERSION 1
48: /* increment this whenever the primitives change in an incompatible way */
49:
50: #ifndef DEFAULTPATH
51: # define DEFAULTPATH "."
52: #endif
53:
54: #ifdef MSDOS
55: jmp_buf throw_jmp_buf;
56: #endif
57:
58: #if defined(DIRECT_THREADED)
59: # define CA(n) (symbols[(n)])
60: #else
61: # define CA(n) ((Cell)(symbols+(n)))
62: #endif
63:
64: #define maxaligned(n) (typeof(n))((((Cell)n)+sizeof(Float)-1)&-sizeof(Float))
65:
66: static UCell dictsize=0;
67: static UCell dsize=0;
68: static UCell rsize=0;
69: static UCell fsize=0;
70: static UCell lsize=0;
71: int offset_image=0;
72: int die_on_signal=0;
73: #ifndef INCLUDE_IMAGE
74: static int clear_dictionary=0;
75: static size_t pagesize=0;
76: #endif
77: static int debug=0;
78: char *progname;
79:
80: /* image file format:
81: * "#! binary-path -i\n" (e.g., "#! /usr/local/bin/gforth-0.4.0 -i\n")
82: * padding to a multiple of 8
83: * magic: "Gforth2x" means format 0.4,
84: * where x is a byte with
85: * bit 7: reserved = 0
86: * bit 6:5: address unit size 2^n octets
87: * bit 4:3: character size 2^n octets
88: * bit 2:1: cell size 2^n octets
89: * bit 0: endian, big=0, little=1.
90: * The magic are always 8 octets, no matter what the native AU/character size is
91: * padding to max alignment (no padding necessary on current machines)
92: * ImageHeader structure (see below)
93: * data (size in ImageHeader.image_size)
94: * tags ((if relocatable, 1 bit/data cell)
95: *
96: * tag==1 means that the corresponding word is an address;
97: * If the word is >=0, the address is within the image;
98: * addresses within the image are given relative to the start of the image.
99: * If the word =-1 (CF_NIL), the address is NIL,
100: * If the word is <CF_NIL and >CF(DODOES), it's a CFA (:, Create, ...)
101: * If the word =CF(DODOES), it's a DOES> CFA
102: * If the word =CF(DOESJUMP), it's a DOES JUMP (2 Cells after DOES>,
103: * possibly containing a jump to dodoes)
104: * If the word is <CF(DOESJUMP), it's a primitive
105: */
106:
107: typedef struct {
108: Address base; /* base address of image (0 if relocatable) */
109: UCell checksum; /* checksum of ca's to protect against some
110: incompatible binary/executable combinations
111: (0 if relocatable) */
112: UCell image_size; /* all sizes in bytes */
113: UCell dict_size;
114: UCell data_stack_size;
115: UCell fp_stack_size;
116: UCell return_stack_size;
117: UCell locals_stack_size;
118: Xt *boot_entry; /* initial ip for booting (in BOOT) */
119: Xt *throw_entry; /* ip after signal (in THROW) */
120: Cell unused1; /* possibly tib stack size */
121: Cell unused2;
122: Address data_stack_base; /* this and the following fields are initialized by the loader */
123: Address fp_stack_base;
124: Address return_stack_base;
125: Address locals_stack_base;
126: } ImageHeader;
127: /* the image-header is created in main.fs */
128:
129: void relocate(Cell *image, const char *bitstring, int size, Label symbols[])
130: {
131: int i=0, j, k, steps=(size/sizeof(Cell))/8;
132: Cell token;
133: char bits;
134: /* static char bits[8]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01};*/
135:
136: /* printf("relocating %x[%x]\n", image, size); */
137:
138: for(k=0; k<=steps; k++)
139: for(j=0, bits=bitstring[k]; j<RELINFOBITS; j++, i++, bits<<=1) {
140: /* fprintf(stderr,"relocate: image[%d]\n", i);*/
141: if(bits & (1U << (RELINFOBITS-1))) {
142: /* fprintf(stderr,"relocate: image[%d]=%d\n", i, image[i]);*/
143: if((token=image[i])<0)
144: switch(token)
145: {
146: case CF_NIL : image[i]=0; break;
147: #if !defined(DOUBLY_INDIRECT)
148: case CF(DOCOL) :
149: case CF(DOVAR) :
150: case CF(DOCON) :
151: case CF(DOUSER) :
152: case CF(DODEFER) :
153: case CF(DOFIELD) : MAKE_CF(image+i,symbols[CF(token)]); break;
154: case CF(DOESJUMP): MAKE_DOES_HANDLER(image+i); break;
155: #endif /* !defined(DOUBLY_INDIRECT) */
156: case CF(DODOES) :
157: MAKE_DOES_CF(image+i,image[i+1]+((Cell)image));
158: break;
159: default :
160: /* printf("Code field generation image[%x]:=CA(%x)\n",
161: i, CF(image[i])); */
162: image[i]=(Cell)CA(CF(token));
163: }
164: else
165: image[i]+=(Cell)image;
166: }
167: }
168: }
169:
170: UCell checksum(Label symbols[])
171: {
172: UCell r=PRIM_VERSION;
173: Cell i;
174:
175: for (i=DOCOL; i<=DOESJUMP; i++) {
176: r ^= (UCell)(symbols[i]);
177: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
178: }
179: #ifdef DIRECT_THREADED
180: /* we have to consider all the primitives */
181: for (; symbols[i]!=(Label)0; i++) {
182: r ^= (UCell)(symbols[i]);
183: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
184: }
185: #else
186: /* in indirect threaded code all primitives are accessed through the
187: symbols table, so we just have to put the base address of symbols
188: in the checksum */
189: r ^= (UCell)symbols;
190: #endif
191: return r;
192: }
193:
194: Address verbose_malloc(Cell size)
195: {
196: Address r;
197: /* leave a little room (64B) for stack underflows */
198: if ((r = malloc(size+64))==NULL) {
199: perror(progname);
200: exit(1);
201: }
202: r = (Address)((((Cell)r)+(sizeof(Float)-1))&(-sizeof(Float)));
203: if (debug)
204: fprintf(stderr, "malloc succeeds, address=$%lx\n", (long)r);
205: return r;
206: }
207:
208: Address my_alloc(Cell size)
209: {
210: #if HAVE_MMAP
211: static Address next_address=0;
212: Address r;
213:
214: #if defined(MAP_ANON)
215: if (debug)
216: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_ANON, ...); ", (long)next_address, (long)size);
217: r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
218: #else /* !defined(MAP_ANON) */
219: /* Ultrix (at least does not define MAP_FILE and MAP_PRIVATE (both are
220: apparently defaults*/
221: #ifndef MAP_FILE
222: # define MAP_FILE 0
223: #endif
224: #ifndef MAP_PRIVATE
225: # define MAP_PRIVATE 0
226: #endif
227: static int dev_zero=-1;
228:
229: if (dev_zero == -1)
230: dev_zero = open("/dev/zero", O_RDONLY);
231: if (dev_zero == -1) {
232: r = (Address)-1;
233: if (debug)
234: fprintf(stderr, "open(\"/dev/zero\"...) failed (%s), no mmap; ",
235: strerror(errno));
236: } else {
237: if (debug)
238: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FILE, dev_zero, ...); ", (long)next_address, (long)size);
239: r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FILE|MAP_PRIVATE, dev_zero, 0);
240: }
241: #endif /* !defined(MAP_ANON) */
242:
243: if (r != (Address)-1) {
244: if (debug)
245: fprintf(stderr, "success, address=$%lx\n", (long) r);
246: if (pagesize != 0)
247: next_address = (Address)(((((Cell)r)+size-1)&-pagesize)+2*pagesize); /* leave one page unmapped */
248: return r;
249: }
250: if (debug)
251: fprintf(stderr, "failed: %s\n", strerror(errno));
252: #endif /* HAVE_MMAP */
253: /* use malloc as fallback */
254: return verbose_malloc(size);
255: }
256:
257: #if (defined(mips) && !defined(INDIRECT_THREADED))
258: /* the 256MB jump restriction on the MIPS architecture makes the
259: combination of direct threading and mmap unsafe. */
260: #define dict_alloc(size) verbose_malloc(size)
261: #else
262: #define dict_alloc(size) my_alloc(size)
263: #endif
264:
265: void set_stack_sizes(ImageHeader * header)
266: {
267: if (dictsize==0)
268: dictsize = header->dict_size;
269: if (dsize==0)
270: dsize = header->data_stack_size;
271: if (rsize==0)
272: rsize = header->return_stack_size;
273: if (fsize==0)
274: fsize = header->fp_stack_size;
275: if (lsize==0)
276: lsize = header->locals_stack_size;
277: dictsize=maxaligned(dictsize);
278: dsize=maxaligned(dsize);
279: rsize=maxaligned(rsize);
280: lsize=maxaligned(lsize);
281: fsize=maxaligned(fsize);
282: }
283:
284: void alloc_stacks(ImageHeader * header)
285: {
286: header->dict_size=dictsize;
287: header->data_stack_size=dsize;
288: header->fp_stack_size=fsize;
289: header->return_stack_size=rsize;
290: header->locals_stack_size=lsize;
291:
292: header->data_stack_base=my_alloc(dsize);
293: header->fp_stack_base=my_alloc(fsize);
294: header->return_stack_base=my_alloc(rsize);
295: header->locals_stack_base=my_alloc(lsize);
296: }
297:
298: int go_forth(Address image, int stack, Cell *entries)
299: {
300: Cell *sp=(Cell*)(((ImageHeader *)image)->data_stack_base + dsize);
301: Float *fp=(Float *)(((ImageHeader *)image)->fp_stack_base + fsize);
302: Cell *rp=(Cell *)(((ImageHeader *)image)->return_stack_base + rsize);
303: Address lp=((ImageHeader *)image)->locals_stack_base + lsize;
304: Xt *ip=(Xt *)(((ImageHeader *)image)->boot_entry);
305: #ifdef SYSSIGNALS
306: int throw_code;
307: #endif
308:
309: /* ensure that the cached elements (if any) are accessible */
310: IF_TOS(sp--);
311: IF_FTOS(fp--);
312:
313: for(;stack>0;stack--)
314: *--sp=entries[stack-1];
315:
316: #if !defined(MSDOS) && !defined(SHARC) && !defined(_WIN32) && !defined(__EMX__)
317: get_winsize();
318: #endif
319:
320: #ifdef SYSSIGNALS
321: install_signal_handlers(); /* right place? */
322:
323: if ((throw_code=setjmp(throw_jmp_buf))) {
324: static Cell signal_data_stack[8];
325: static Cell signal_return_stack[8];
326: static Float signal_fp_stack[1];
327:
328: signal_data_stack[7]=throw_code;
329:
330: return((int)engine(((ImageHeader *)image)->throw_entry,signal_data_stack+7,
331: signal_return_stack+8,signal_fp_stack,0));
332: }
333: #endif
334:
335: return((int)engine(ip,sp,rp,fp,lp));
336: }
337:
338: #ifndef INCLUDE_IMAGE
339: Address loader(FILE *imagefile, char* filename)
340: /* returns the address of the image proper (after the preamble) */
341: {
342: ImageHeader header;
343: Address image;
344: Address imp; /* image+preamble */
345: Char magic[9];
346: Cell preamblesize=0;
347: Label *symbols = engine(0,0,0,0,0);
348: Cell data_offset = offset_image ? 56*sizeof(Cell) : 0;
349: UCell check_sum;
350: static char* endianstring[]= { "big","little" };
351: Cell ausize = ((RELINFOBITS == 8) ? 0 :
352: (RELINFOBITS == 16) ? 1 :
353: (RELINFOBITS == 32) ? 2 : 3);
354: Cell charsize = ((sizeof(Char) == 1) ? 0 :
355: (sizeof(Char) == 2) ? 1 :
356: (sizeof(Char) == 4) ? 2 : 3) + ausize;
357: Cell cellsize = ((sizeof(Cell) == 1) ? 0 :
358: (sizeof(Cell) == 2) ? 1 :
359: (sizeof(Cell) == 4) ? 2 : 3) + ausize;
360:
361: #ifndef DOUBLY_INDIRECT
362: check_sum = checksum(symbols);
363: #else /* defined(DOUBLY_INDIRECT) */
364: check_sum = (UCell)symbols;
365: #endif /* defined(DOUBLY_INDIRECT) */
366:
367: do {
368: if(fread(magic,sizeof(Char),8,imagefile) < 8) {
369: fprintf(stderr,"%s: image %s doesn't seem to be a Gforth (>=0.4) image.\n",
370: progname, filename);
371: exit(1);
372: }
373: preamblesize+=8;
374: } while(memcmp(magic,"Gforth2",7));
375: if (debug) {
376: magic[8]='\0';
377: fprintf(stderr,"Magic found: %s\n", magic);
378: }
379:
380: if(magic[7] != (ausize << 5) + (charsize << 3) + (cellsize << 1) +
381: #ifdef WORDS_BIGENDIAN
382: 0
383: #else
384: 1
385: #endif
386: )
387: { fprintf(stderr,"This image is %d bit cell, %d bit char, %d bit address unit %s-endian,\n"
388: "whereas the machine is %d bit cell, %d bit char, %d bit address unit, %s-endian.\n",
389: (1<<((magic[7]>>1)&3))*8,
390: (1<<((magic[7]>>3)&3))*8,
391: (1<<((magic[7]>>5)&3))*8,
392: endianstring[magic[7]&1],
393: (1<<cellsize)*8,
394: (1<<charsize)*8,
395: (1<<ausize)*8,
396: endianstring[
397: #ifdef WORDS_BIGENDIAN
398: 0
399: #else
400: 1
401: #endif
402: ]);
403: exit(-2);
404: };
405:
406: fread((void *)&header,sizeof(ImageHeader),1,imagefile);
407:
408: set_stack_sizes(&header);
409:
410: #if HAVE_GETPAGESIZE
411: pagesize=getpagesize(); /* Linux/GNU libc offers this */
412: #elif HAVE_SYSCONF && defined(_SC_PAGESIZE)
413: pagesize=sysconf(_SC_PAGESIZE); /* POSIX.4 */
414: #elif PAGESIZE
415: pagesize=PAGESIZE; /* in limits.h according to Gallmeister's POSIX.4 book */
416: #endif
417: if (debug)
418: fprintf(stderr,"pagesize=%ld\n",(unsigned long) pagesize);
419:
420: image = dict_alloc(preamblesize+dictsize+data_offset)+data_offset;
421: rewind(imagefile); /* fseek(imagefile,0L,SEEK_SET); */
422: if (clear_dictionary)
423: memset(image, 0, dictsize);
424: fread(image, 1, preamblesize+header.image_size, imagefile);
425: imp=image+preamblesize;
426: if(header.base==0) {
427: Cell reloc_size=((header.image_size-1)/sizeof(Cell))/8+1;
428: char reloc_bits[reloc_size];
429: fread(reloc_bits, 1, reloc_size, imagefile);
430: relocate((Cell *)imp, reloc_bits, header.image_size, symbols);
431: #if 0
432: { /* let's see what the relocator did */
433: FILE *snapshot=fopen("snapshot.fi","wb");
434: fwrite(image,1,imagesize,snapshot);
435: fclose(snapshot);
436: }
437: #endif
438: }
439: else if(header.base!=imp) {
440: fprintf(stderr,"%s: Cannot load nonrelocatable image (compiled for address $%lx) at address $%lx\n",
441: progname, (unsigned long)header.base, (unsigned long)imp);
442: exit(1);
443: }
444: if (header.checksum==0)
445: ((ImageHeader *)imp)->checksum=check_sum;
446: else if (header.checksum != check_sum) {
447: fprintf(stderr,"%s: Checksum of image ($%lx) does not match the executable ($%lx)\n",
448: progname, (unsigned long)(header.checksum),(unsigned long)check_sum);
449: exit(1);
450: }
451: fclose(imagefile);
452:
453: alloc_stacks((ImageHeader *)imp);
454:
455: CACHE_FLUSH(imp, header.image_size);
456:
457: return imp;
458: }
459:
460: int onlypath(char *file)
461: {
462: int i;
463: i=strlen(file);
464: while (i) {
465: if (file[i]=='\\' || file[i]=='/') break;
466: i--;
467: }
468: return i;
469: }
470:
471: FILE *openimage(char *fullfilename)
472: {
473: FILE *image_file;
474:
475: image_file=fopen(fullfilename,"rb");
476: if (image_file!=NULL && debug)
477: fprintf(stderr, "Opened image file: %s\n", fullfilename);
478: return image_file;
479: }
480:
481: FILE *checkimage(char *path, int len, char *imagename)
482: {
483: int dirlen=len;
484: char fullfilename[dirlen+strlen(imagename)+2];
485:
486: memcpy(fullfilename, path, dirlen);
487: if (fullfilename[dirlen-1]!='/')
488: fullfilename[dirlen++]='/';
489: strcpy(fullfilename+dirlen,imagename);
490: return openimage(fullfilename);
491: }
492:
493: FILE * open_image_file(char * imagename, char * path)
494: {
495: FILE * image_file=NULL;
496:
497: if(strchr(imagename, '/')==NULL) {
498: /* first check the directory where the exe file is in !! 01may97jaw */
499: if (onlypath(progname))
500: image_file=checkimage(progname, onlypath(progname), imagename);
501: if (!image_file)
502: do {
503: char *pend=strchr(path, PATHSEP);
504: if (pend==NULL)
505: pend=path+strlen(path);
506: if (strlen(path)==0) break;
507: image_file=checkimage(path, pend-path, imagename);
508: path=pend+(*pend==PATHSEP);
509: } while (image_file==NULL);
510: } else {
511: image_file=openimage(imagename);
512: }
513:
514: if (!image_file) {
515: fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n",
516: progname, imagename, path);
517: exit(1);
518: }
519:
520: return image_file;
521: }
522: #endif
523:
524: #ifdef HAS_OS
525: UCell convsize(char *s, UCell elemsize)
526: /* converts s of the format [0-9]+[bekMGT]? (e.g. 25k) into the number
527: of bytes. the letter at the end indicates the unit, where e stands
528: for the element size. default is e */
529: {
530: char *endp;
531: UCell n,m;
532:
533: m = elemsize;
534: n = strtoul(s,&endp,0);
535: if (endp!=NULL) {
536: if (strcmp(endp,"b")==0)
537: m=1;
538: else if (strcmp(endp,"k")==0)
539: m=1024;
540: else if (strcmp(endp,"M")==0)
541: m=1024*1024;
542: else if (strcmp(endp,"G")==0)
543: m=1024*1024*1024;
544: else if (strcmp(endp,"T")==0) {
545: #if (SIZEOF_CHAR_P > 4)
546: m=1024*1024*1024*1024;
547: #else
548: fprintf(stderr,"%s: size specification \"%s\" too large for this machine\n", progname, endp);
549: exit(1);
550: #endif
551: } else if (strcmp(endp,"e")!=0 && strcmp(endp,"")!=0) {
552: fprintf(stderr,"%s: cannot grok size specification %s: invalid unit \"%s\"\n", progname, s, endp);
553: exit(1);
554: }
555: }
556: return n*m;
557: }
558:
559: void gforth_args(int argc, char ** argv, char ** path, char ** imagename)
560: {
561: int c;
562:
563: opterr=0;
564: while (1) {
565: int option_index=0;
566: static struct option opts[] = {
567: {"image-file", required_argument, NULL, 'i'},
568: {"dictionary-size", required_argument, NULL, 'm'},
569: {"data-stack-size", required_argument, NULL, 'd'},
570: {"return-stack-size", required_argument, NULL, 'r'},
571: {"fp-stack-size", required_argument, NULL, 'f'},
572: {"locals-stack-size", required_argument, NULL, 'l'},
573: {"path", required_argument, NULL, 'p'},
574: {"version", no_argument, NULL, 'v'},
575: {"help", no_argument, NULL, 'h'},
576: /* put something != 0 into offset_image */
577: {"offset-image", no_argument, &offset_image, 1},
578: {"no-offset-im", no_argument, &offset_image, 0},
579: {"clear-dictionary", no_argument, &clear_dictionary, 1},
580: {"die-on-signal", no_argument, &die_on_signal, 1},
581: {"debug", no_argument, &debug, 1},
582: {0,0,0,0}
583: /* no-init-file, no-rc? */
584: };
585:
586: c = getopt_long(argc, argv, "+i:m:d:r:f:l:p:vh", opts, &option_index);
587:
588: if (c==EOF)
589: break;
590: if (c=='?') {
591: optind--;
592: break;
593: }
594: switch (c) {
595: case 'i': *imagename = optarg; break;
596: case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
597: case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
598: case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
599: case 'f': fsize = convsize(optarg,sizeof(Float)); break;
600: case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
601: case 'p': *path = optarg; break;
602: case 'v': fprintf(stderr, "gforth %s\n", VERSION); exit(0);
603: case 'h':
604: fprintf(stderr, "Usage: %s [engine options] [image arguments]\n\
605: Engine Options:\n\
606: --clear-dictionary Initialize the dictionary with 0 bytes\n\
607: -d SIZE, --data-stack-size=SIZE Specify data stack size\n\
608: --debug Print debugging information during startup\n\
609: --die-on-signal exit instead of CATCHing some signals\n\
610: -f SIZE, --fp-stack-size=SIZE Specify floating point stack size\n\
611: -h, --help Print this message and exit\n\
612: -i FILE, --image-file=FILE Use image FILE instead of `gforth.fi'\n\
613: -l SIZE, --locals-stack-size=SIZE Specify locals stack size\n\
614: -m SIZE, --dictionary-size=SIZE Specify Forth dictionary size\n\
615: --no-offset-im Load image at normal position\n\
616: --offset-image Load image at a different position\n\
617: -p PATH, --path=PATH Search path for finding image and sources\n\
618: -r SIZE, --return-stack-size=SIZE Specify return stack size\n\
619: -v, --version Print version and exit\n\
620: SIZE arguments consist of an integer followed by a unit. The unit can be\n\
621: `b' (byte), `e' (element; default), `k' (KB), `M' (MB), `G' (GB) or `T' (TB).\n",
622: argv[0]);
623: optind--;
624: return;
625: exit(0);
626: }
627: }
628: }
629: #endif
630:
631: #ifdef INCLUDE_IMAGE
632: extern Cell image[];
633: extern const char reloc_bits[];
634: #endif
635:
636: int main(int argc, char **argv, char **env)
637: {
638: char *path = getenv("GFORTHPATH") ? : DEFAULTPATH;
639: #ifndef INCLUDE_IMAGE
640: char *imagename="gforth.fi";
641: FILE *image_file;
642: Address image;
643: #endif
644: int retvalue;
645:
646: #if defined(i386) && defined(ALIGNMENT_CHECK) && !defined(DIRECT_THREADED)
647: /* turn on alignment checks on the 486.
648: * on the 386 this should have no effect. */
649: __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
650: /* this is unusable with Linux' libc.4.6.27, because this library is
651: not alignment-clean; we would have to replace some library
652: functions (e.g., memcpy) to make it work. Also GCC doesn't try to keep
653: the stack FP-aligned. */
654: #endif
655:
656: /* buffering of the user output device */
657: #ifdef _IONBF
658: if (isatty(fileno(stdout))) {
659: fflush(stdout);
660: setvbuf(stdout,NULL,_IONBF,0);
661: }
662: #endif
663:
664: progname = argv[0];
665:
666: #ifdef HAS_OS
667: gforth_args(argc, argv, &path, &imagename);
668: #endif
669:
670: #ifdef INCLUDE_IMAGE
671: set_stack_sizes((ImageHeader *)image);
672: relocate(image, reloc_bits, ((ImageHeader*)&image)->image_size, (Label*)engine(0, 0, 0, 0, 0));
673: alloc_stacks((ImageHeader *)image);
674: #else
675: image_file = open_image_file(imagename, path);
676: image = loader(image_file, imagename);
677: #endif
678:
679: {
680: char path2[strlen(path)+1];
681: char *p1, *p2;
682: Cell environ[]= {
683: (Cell)argc-(optind-1),
684: (Cell)(argv+(optind-1)),
685: (Cell)strlen(path),
686: (Cell)path2};
687: argv[optind-1] = progname;
688: /*
689: for (i=0; i<environ[0]; i++)
690: printf("%s\n", ((char **)(environ[1]))[i]);
691: */
692: /* make path OS-independent by replacing path separators with NUL */
693: for (p1=path, p2=path2; *p1!='\0'; p1++, p2++)
694: if (*p1==PATHSEP)
695: *p2 = '\0';
696: else
697: *p2 = *p1;
698: *p2='\0';
699: retvalue = go_forth(image, 4, environ);
700: deprep_terminal();
701: }
702: return retvalue;
703: }
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