Annotation of gforth/engine/main.c, revision 1.8
1.1 anton 1: /* command line interpretation, image loading etc. for Gforth
2:
3:
4: Copyright (C) 1995 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>
1.2 pazsan 27: #include <unistd.h>
1.1 anton 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: #if HAVE_SYS_MMAN_H
36: #include <sys/mman.h>
37: #endif
38: #include "forth.h"
39: #include "io.h"
40: #include "getopt.h"
41:
42: #define PRIM_VERSION 1
43: /* increment this whenever the primitives change in an incompatible way */
44:
45: #ifdef MSDOS
46: jmp_buf throw_jmp_buf;
47: # ifndef DEFAULTPATH
48: # define DEFAULTPATH "."
49: # endif
50: #endif
51:
52: #if defined(DIRECT_THREADED)
53: # define CA(n) (symbols[(n)])
54: #else
55: # define CA(n) ((Cell)(symbols+(n)))
56: #endif
57:
58: #define maxaligned(n) (typeof(n))((((Cell)n)+sizeof(Float)-1)&-sizeof(Float))
59:
60: static UCell dictsize=0;
61: static UCell dsize=0;
62: static UCell rsize=0;
63: static UCell fsize=0;
64: static UCell lsize=0;
65: int offset_image=0;
1.4 anton 66: int die_on_signal=0;
1.1 anton 67: static int clear_dictionary=0;
68: static int debug=0;
69: static size_t pagesize=0;
70: char *progname;
71:
72: /* image file format:
73: * "#! binary-path -i\n" (e.g., "#! /usr/local/bin/gforth-0.3.0 -i\n")
74: * padding to a multiple of 8
75: * magic: "Gforth1x" means format 0.2,
76: * where x is even for big endian and odd for little endian
77: * and x & ~1 is the size of the cell in bytes.
78: * padding to max alignment (no padding necessary on current machines)
79: * ImageHeader structure (see below)
80: * data (size in ImageHeader.image_size)
81: * tags ((if relocatable, 1 bit/data cell)
82: *
83: * tag==1 means that the corresponding word is an address;
84: * If the word is >=0, the address is within the image;
85: * addresses within the image are given relative to the start of the image.
86: * If the word =-1 (CF_NIL), the address is NIL,
87: * If the word is <CF_NIL and >CF(DODOES), it's a CFA (:, Create, ...)
88: * If the word =CF(DODOES), it's a DOES> CFA
89: * If the word =CF(DOESJUMP), it's a DOES JUMP (2 Cells after DOES>,
90: * possibly containing a jump to dodoes)
91: * If the word is <CF(DOESJUMP), it's a primitive
92: */
93:
94: typedef struct {
95: Address base; /* base address of image (0 if relocatable) */
96: UCell checksum; /* checksum of ca's to protect against some
97: incompatible binary/executable combinations
98: (0 if relocatable) */
99: UCell image_size; /* all sizes in bytes */
100: UCell dict_size;
101: UCell data_stack_size;
102: UCell fp_stack_size;
103: UCell return_stack_size;
104: UCell locals_stack_size;
105: Xt *boot_entry; /* initial ip for booting (in BOOT) */
106: Xt *throw_entry; /* ip after signal (in THROW) */
107: Cell unused1; /* possibly tib stack size */
108: Cell unused2;
109: Address data_stack_base; /* this and the following fields are initialized by the loader */
110: Address fp_stack_base;
111: Address return_stack_base;
112: Address locals_stack_base;
113: } ImageHeader;
114: /* the image-header is created in main.fs */
115:
116: void relocate(Cell *image, char *bitstring, int size, Label symbols[])
117: {
118: int i=0, j, k, steps=(size/sizeof(Cell))/8;
119: char bits;
120: /* static char bits[8]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01};*/
121:
122: /* printf("relocating %x[%x]\n", image, size); */
123:
124: for(k=0; k<=steps; k++)
125: for(j=0, bits=bitstring[k]; j<8; j++, i++, bits<<=1) {
126: /* fprintf(stderr,"relocate: image[%d]\n", i);*/
127: if(bits & 0x80) {
128: /* fprintf(stderr,"relocate: image[%d]=%d\n", i, image[i]);*/
129: if(image[i]<0)
130: switch(image[i])
131: {
132: case CF_NIL : image[i]=0; break;
133: #if !defined(DOUBLY_INDIRECT)
134: case CF(DOCOL) :
135: case CF(DOVAR) :
136: case CF(DOCON) :
137: case CF(DOUSER) :
138: case CF(DODEFER) :
139: case CF(DOFIELD) : MAKE_CF(image+i,symbols[CF(image[i])]); break;
140: case CF(DOESJUMP): MAKE_DOES_HANDLER(image+i); break;
141: #endif /* !defined(DOUBLY_INDIRECT) */
142: case CF(DODOES) :
143: MAKE_DOES_CF(image+i,image[i+1]+((Cell)image));
144: break;
145: default :
146: /* printf("Code field generation image[%x]:=CA(%x)\n",
147: i, CF(image[i])); */
148: image[i]=(Cell)CA(CF(image[i]));
149: }
150: else
151: image[i]+=(Cell)image;
152: }
153: }
154: }
155:
156: UCell checksum(Label symbols[])
157: {
158: UCell r=PRIM_VERSION;
159: Cell i;
160:
161: for (i=DOCOL; i<=DOESJUMP; i++) {
162: r ^= (UCell)(symbols[i]);
163: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
164: }
165: #ifdef DIRECT_THREADED
166: /* we have to consider all the primitives */
167: for (; symbols[i]!=(Label)0; i++) {
168: r ^= (UCell)(symbols[i]);
169: r = (r << 5) | (r >> (8*sizeof(Cell)-5));
170: }
171: #else
172: /* in indirect threaded code all primitives are accessed through the
173: symbols table, so we just have to put the base address of symbols
174: in the checksum */
175: r ^= (UCell)symbols;
176: #endif
177: return r;
178: }
179:
1.3 anton 180: Address verbose_malloc(Cell size)
181: {
182: Address r;
183: /* leave a little room (64B) for stack underflows */
184: if ((r = malloc(size+64))==NULL) {
185: perror(progname);
186: exit(1);
187: }
188: r = (Address)((((Cell)r)+(sizeof(Float)-1))&(-sizeof(Float)));
189: if (debug)
190: fprintf(stderr, "malloc succeeds, address=$%lx\n", (long)r);
191: return r;
192: }
193:
1.1 anton 194: Address my_alloc(Cell size)
195: {
1.5 jwilke 196: #if HAVE_MMAP
1.1 anton 197: static Address next_address=0;
198: Address r;
199:
200: #if defined(MAP_ANON)
201: if (debug)
202: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_ANON, ...); ", (long)next_address, (long)size);
203: r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
204: #else /* !defined(MAP_ANON) */
205: /* Ultrix (at least does not define MAP_FILE and MAP_PRIVATE (both are
206: apparently defaults*/
207: #ifndef MAP_FILE
208: # define MAP_FILE 0
209: #endif
210: #ifndef MAP_PRIVATE
211: # define MAP_PRIVATE 0
212: #endif
213: static int dev_zero=-1;
214:
215: if (dev_zero == -1)
216: dev_zero = open("/dev/zero", O_RDONLY);
217: if (dev_zero == -1) {
218: r = (Address)-1;
219: if (debug)
220: fprintf(stderr, "open(\"/dev/zero\"...) failed (%s), no mmap; ",
221: strerror(errno));
222: } else {
223: if (debug)
224: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FILE, dev_zero, ...); ", (long)next_address, (long)size);
225: r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FILE|MAP_PRIVATE, dev_zero, 0);
226: }
227: #endif /* !defined(MAP_ANON) */
228:
229: if (r != (Address)-1) {
230: if (debug)
231: fprintf(stderr, "success, address=$%lx\n", (long) r);
232: if (pagesize != 0)
233: next_address = (Address)(((((Cell)r)+size-1)&-pagesize)+2*pagesize); /* leave one page unmapped */
234: return r;
235: }
236: if (debug)
237: fprintf(stderr, "failed: %s\n", strerror(errno));
238: #endif /* HAVE_MMAP */
1.3 anton 239: /* use malloc as fallback */
240: return verbose_malloc(size);
1.1 anton 241: }
242:
1.3 anton 243: #if (defined(mips) && !defined(INDIRECT_THREADED))
244: /* the 256MB jump restriction on the MIPS architecture makes the
245: combination of direct threading and mmap unsafe. */
246: #define dict_alloc(size) verbose_malloc(size)
247: #else
248: #define dict_alloc(size) my_alloc(size)
249: #endif
250:
1.1 anton 251: Address loader(FILE *imagefile, char* filename)
252: /* returns the address of the image proper (after the preamble) */
253: {
254: ImageHeader header;
255: Address image;
256: Address imp; /* image+preamble */
257: Char magic[9];
258: Cell preamblesize=0;
259: Label *symbols = engine(0,0,0,0,0);
1.6 pazsan 260: Cell data_offset = offset_image ? 56*sizeof(Cell) : 0;
1.1 anton 261: UCell check_sum;
262: static char* endianstring[]= { "big","little" };
263:
264: #ifndef DOUBLY_INDIRECT
265: check_sum = checksum(symbols);
266: #else /* defined(DOUBLY_INDIRECT) */
267: check_sum = (UCell)symbols;
268: #endif /* defined(DOUBLY_INDIRECT) */
269:
270: do
271: {
272: if(fread(magic,sizeof(Char),8,imagefile) < 8) {
273: fprintf(stderr,"%s: image %s doesn't seem to be a Gforth (>=0.2) image.\n",
274: progname, filename);
275: exit(1);
276: }
277: preamblesize+=8;
278: }
279: while(memcmp(magic,"Gforth1",7));
280: if (debug) {
281: magic[8]='\0';
282: fprintf(stderr,"Magic found: %s\n", magic);
283: }
284:
285: if(magic[7] != sizeof(Cell) +
286: #ifdef WORDS_BIGENDIAN
287: '0'
288: #else
289: '1'
290: #endif
291: )
292: { fprintf(stderr,"This image is %d bit %s-endian, whereas the machine is %d bit %s-endian.\n",
293: ((magic[7]-'0')&~1)*8, endianstring[magic[7]&1],
1.5 jwilke 294: (int) sizeof(Cell)*8, endianstring[
1.1 anton 295: #ifdef WORDS_BIGENDIAN
296: 0
297: #else
298: 1
299: #endif
300: ]);
301: exit(-2);
302: };
303:
304: fread((void *)&header,sizeof(ImageHeader),1,imagefile);
305: if (dictsize==0)
306: dictsize = header.dict_size;
307: if (dsize==0)
308: dsize=header.data_stack_size;
309: if (rsize==0)
310: rsize=header.return_stack_size;
311: if (fsize==0)
312: fsize=header.fp_stack_size;
313: if (lsize==0)
314: lsize=header.locals_stack_size;
315: dictsize=maxaligned(dictsize);
316: dsize=maxaligned(dsize);
317: rsize=maxaligned(rsize);
318: lsize=maxaligned(lsize);
319: fsize=maxaligned(fsize);
320:
321: #if HAVE_GETPAGESIZE
322: pagesize=getpagesize(); /* Linux/GNU libc offers this */
323: #elif HAVE_SYSCONF && defined(_SC_PAGESIZE)
324: pagesize=sysconf(_SC_PAGESIZE); /* POSIX.4 */
325: #elif PAGESIZE
326: pagesize=PAGESIZE; /* in limits.h according to Gallmeister's POSIX.4 book */
327: #endif
328: if (debug)
1.5 jwilke 329: fprintf(stderr,"pagesize=%ld\n",(unsigned long) pagesize);
1.1 anton 330:
1.3 anton 331: image = dict_alloc(preamblesize+dictsize+data_offset)+data_offset;
1.1 anton 332: rewind(imagefile); /* fseek(imagefile,0L,SEEK_SET); */
333: if (clear_dictionary)
334: memset(image,0,dictsize);
335: fread(image,1,preamblesize+header.image_size,imagefile);
336: imp=image+preamblesize;
337: if(header.base==0) {
338: Cell reloc_size=((header.image_size-1)/sizeof(Cell))/8+1;
339: char reloc_bits[reloc_size];
340: fread(reloc_bits,1,reloc_size,imagefile);
341: relocate((Cell *)imp,reloc_bits,header.image_size,symbols);
342: #if 0
343: { /* let's see what the relocator did */
344: FILE *snapshot=fopen("snapshot.fi","wb");
345: fwrite(image,1,imagesize,snapshot);
346: fclose(snapshot);
347: }
348: #endif
349: }
350: else if(header.base!=imp) {
351: fprintf(stderr,"%s: Cannot load nonrelocatable image (compiled for address $%lx) at address $%lx\n",
352: progname, (unsigned long)header.base, (unsigned long)imp);
353: exit(1);
354: }
355: if (header.checksum==0)
356: ((ImageHeader *)imp)->checksum=check_sum;
357: else if (header.checksum != check_sum) {
358: fprintf(stderr,"%s: Checksum of image ($%lx) does not match the executable ($%lx)\n",
359: progname, (unsigned long)(header.checksum),(unsigned long)check_sum);
360: exit(1);
361: }
362: fclose(imagefile);
363:
364: ((ImageHeader *)imp)->dict_size=dictsize;
365: ((ImageHeader *)imp)->data_stack_size=dsize;
366: ((ImageHeader *)imp)->fp_stack_size=fsize;
367: ((ImageHeader *)imp)->return_stack_size=rsize;
368: ((ImageHeader *)imp)->locals_stack_size=lsize;
369:
370: ((ImageHeader *)imp)->data_stack_base=my_alloc(dsize);
371: ((ImageHeader *)imp)->fp_stack_base=my_alloc(fsize);
372: ((ImageHeader *)imp)->return_stack_base=my_alloc(rsize);
373: ((ImageHeader *)imp)->locals_stack_base=my_alloc(lsize);
374:
375: CACHE_FLUSH(imp, header.image_size);
376:
377: return imp;
378: }
379:
380: int go_forth(Address image, int stack, Cell *entries)
381: {
382: Cell *sp=(Cell*)(((ImageHeader *)image)->data_stack_base + dsize);
383: Float *fp=(Float *)(((ImageHeader *)image)->fp_stack_base + fsize);
384: Cell *rp=(Cell *)(((ImageHeader *)image)->return_stack_base + rsize);
385: Address lp=((ImageHeader *)image)->locals_stack_base + lsize;
386: Xt *ip=(Xt *)(((ImageHeader *)image)->boot_entry);
387: int throw_code;
388:
389: /* ensure that the cached elements (if any) are accessible */
390: IF_TOS(sp--);
391: IF_FTOS(fp--);
392:
393: for(;stack>0;stack--)
394: *--sp=entries[stack-1];
395:
396: #if !defined(MSDOS) && !defined(_WIN32) && !defined(__EMX__)
397: get_winsize();
398: #endif
399:
400: install_signal_handlers(); /* right place? */
401:
402: if ((throw_code=setjmp(throw_jmp_buf))) {
403: static Cell signal_data_stack[8];
404: static Cell signal_return_stack[8];
405: static Float signal_fp_stack[1];
406:
407: signal_data_stack[7]=throw_code;
408:
409: return((int)engine(((ImageHeader *)image)->throw_entry,signal_data_stack+7,
410: signal_return_stack+8,signal_fp_stack,0));
411: }
412:
413: return((int)engine(ip,sp,rp,fp,lp));
414: }
415:
416: UCell convsize(char *s, UCell elemsize)
1.2 pazsan 417: /* converts s of the format [0-9]+[bekMGT]? (e.g. 25k) into the number
1.1 anton 418: of bytes. the letter at the end indicates the unit, where e stands
419: for the element size. default is e */
420: {
421: char *endp;
422: UCell n,m;
423:
424: m = elemsize;
425: n = strtoul(s,&endp,0);
426: if (endp!=NULL) {
427: if (strcmp(endp,"b")==0)
428: m=1;
429: else if (strcmp(endp,"k")==0)
430: m=1024;
431: else if (strcmp(endp,"M")==0)
432: m=1024*1024;
1.2 pazsan 433: else if (strcmp(endp,"G")==0)
434: m=1024*1024*1024;
435: #if (SIZEOF_CHAR_P > 4)
436: else if (strcmp(endp,"T")==0)
437: m=1024*1024*1024*1024;
438: #endif
1.1 anton 439: else if (strcmp(endp,"e")!=0 && strcmp(endp,"")!=0) {
440: fprintf(stderr,"%s: cannot grok size specification %s: invalid unit \"%s\"\n", progname, s, endp);
441: exit(1);
442: }
443: }
444: return n*m;
445: }
446:
447: int onlypath(char *file)
448: { int i;
449: i=strlen(file);
450: while (i) { if (file[i]=='\\' || file[i]=='/') break;
451: i--; }
452: return (i);
453: }
454:
455: FILE *openimage(char *fullfilename)
456: { FILE *image_file;
457: image_file=fopen(fullfilename,"rb");
458: if (image_file!=NULL && debug)
459: fprintf(stderr, "Opened image file: %s\n", fullfilename);
460: return (image_file);
461: }
462:
463: FILE *checkimage(char *path, int len, char *imagename)
464: { int dirlen=len;
465: char fullfilename[dirlen+strlen(imagename)+2];
466: memcpy(fullfilename, path, dirlen);
467: if (fullfilename[dirlen-1]!='/')
468: fullfilename[dirlen++]='/';
469: strcpy(fullfilename+dirlen,imagename);
470: return (openimage(fullfilename));
471: }
472:
473: int main(int argc, char **argv, char **env)
474: {
475: char *path, *path1;
476: char *imagename="gforth.fi";
477: FILE *image_file;
478: int c, retvalue;
479:
480: #if defined(i386) && defined(ALIGNMENT_CHECK) && !defined(DIRECT_THREADED)
481: /* turn on alignment checks on the 486.
482: * on the 386 this should have no effect. */
483: __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
484: /* this is unusable with Linux' libc.4.6.27, because this library is
485: not alignment-clean; we would have to replace some library
486: functions (e.g., memcpy) to make it work */
487: #endif
488:
1.7 anton 489: /* buffering of the user output device */
490: if (isatty(fileno(stdout))) {
491: fflush(stdout);
492: setvbuf(stdout,NULL,_IONBF,0);
493: }
494:
1.1 anton 495: progname = argv[0];
496: if ((path1=getenv("GFORTHPATH"))==NULL)
497: path1 = DEFAULTPATH;
498:
499: opterr=0;
500: while (1) {
501: int option_index=0;
502: static struct option opts[] = {
503: {"image-file", required_argument, NULL, 'i'},
504: {"dictionary-size", required_argument, NULL, 'm'},
505: {"data-stack-size", required_argument, NULL, 'd'},
506: {"return-stack-size", required_argument, NULL, 'r'},
507: {"fp-stack-size", required_argument, NULL, 'f'},
508: {"locals-stack-size", required_argument, NULL, 'l'},
509: {"path", required_argument, NULL, 'p'},
510: {"version", no_argument, NULL, 'v'},
511: {"help", no_argument, NULL, 'h'},
512: /* put something != 0 into offset_image */
513: {"offset-image", no_argument, &offset_image, 1},
514: {"no-offset-im", no_argument, &offset_image, 0},
515: {"clear-dictionary", no_argument, &clear_dictionary, 1},
1.4 anton 516: {"die-on-signal", no_argument, &die_on_signal, 1},
1.1 anton 517: {"debug", no_argument, &debug, 1},
518: {0,0,0,0}
519: /* no-init-file, no-rc? */
520: };
521:
522: c = getopt_long(argc, argv, "+i:m:d:r:f:l:p:vh", opts, &option_index);
523:
524: if (c==EOF)
525: break;
526: if (c=='?') {
527: optind--;
528: break;
529: }
530: switch (c) {
531: case 'i': imagename = optarg; break;
532: case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
533: case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
534: case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
535: case 'f': fsize = convsize(optarg,sizeof(Float)); break;
536: case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
537: case 'p': path1 = optarg; break;
1.8 ! anton 538: case 'v': fprintf(stderr, "gforth %s\n", VERSION); exit(0);
1.1 anton 539: case 'h':
540: fprintf(stderr, "Usage: %s [engine options] [image arguments]\n\
541: Engine Options:\n\
542: -c, --clear-dictionary Initialize the dictionary with 0 bytes\n\
543: -d SIZE, --data-stack-size=SIZE Specify data stack size\n\
544: --debug Print debugging information during startup\n\
1.4 anton 545: --die-on-signal exit instead of CATCHing some signals\n\
1.1 anton 546: -f SIZE, --fp-stack-size=SIZE Specify floating point stack size\n\
547: -h, --help Print this message and exit\n\
548: -i FILE, --image-file=FILE Use image FILE instead of `gforth.fi'\n\
549: -l SIZE, --locals-stack-size=SIZE Specify locals stack size\n\
550: -m SIZE, --dictionary-size=SIZE Specify Forth dictionary size\n\
1.4 anton 551: --no-offset-im Load image at normal position\n\
1.1 anton 552: --offset-image Load image at a different position\n\
553: -p PATH, --path=PATH Search path for finding image and sources\n\
554: -r SIZE, --return-stack-size=SIZE Specify return stack size\n\
555: -v, --version Print version and exit\n\
556: SIZE arguments consist of an integer followed by a unit. The unit can be\n\
557: `b' (bytes), `e' (elements), `k' (kilobytes), or `M' (Megabytes).\n\
558: \n\
559: Arguments of default image `gforth.fi':\n\
560: FILE load FILE (with `require')\n\
1.8 ! anton 561: -e STRING, --evaluate STRING interpret STRING (with `EVALUATE')\n\n\
! 562: Report bugs to <bug-gforth@gnu.ai.mit.edu>\n",
1.1 anton 563: argv[0]); exit(0);
564: }
565: }
566: path=path1;
567: image_file=NULL;
568:
569: if(strchr(imagename, '/')==NULL)
570: {
571: /* first check the directory where the exe file is in !! 01may97jaw */
572: if (onlypath(progname))
573: image_file=checkimage(progname, onlypath(progname), imagename);
574: if (!image_file)
575: do {
576: char *pend=strchr(path, PATHSEP);
577: if (pend==NULL)
578: pend=path+strlen(path);
579: if (strlen(path)==0) break;
580: image_file=checkimage(path, pend-path, imagename);
581: path=pend+(*pend==PATHSEP);
582: } while (image_file==NULL);
583: }
584: else
585: { image_file=openimage(imagename);
586: }
587:
588: if (!image_file)
589: { fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n",
590: progname, imagename, path1);
591: exit(1);
592: }
593:
594: {
595: char path2[strlen(path1)+1];
596: char *p1, *p2;
597: Cell environ[]= {
598: (Cell)argc-(optind-1),
599: (Cell)(argv+(optind-1)),
600: (Cell)strlen(path1),
601: (Cell)path2};
602: argv[optind-1] = progname;
603: /*
604: for (i=0; i<environ[0]; i++)
605: printf("%s\n", ((char **)(environ[1]))[i]);
606: */
607: /* make path OS-independent by replacing path separators with NUL */
608: for (p1=path1, p2=path2; *p1!='\0'; p1++, p2++)
609: if (*p1==PATHSEP)
610: *p2 = '\0';
611: else
612: *p2 = *p1;
613: *p2='\0';
614: retvalue=go_forth(loader(image_file, imagename),4,environ);
615: deprep_terminal();
616: exit(retvalue);
617: }
618: }
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