Annotation of gforth/engine/main.c, revision 1.22

1.1       anton       1: /* command line interpretation, image loading etc. for Gforth
                      2: 
                      3: 
1.12      anton       4:   Copyright (C) 1995,1996,1997,1998 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
                     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>
1.11      pazsan     35: #ifndef STANDALONE
1.1       anton      36: #if HAVE_SYS_MMAN_H
                     37: #include <sys/mman.h>
                     38: #endif
1.11      pazsan     39: #endif
1.1       anton      40: #include "forth.h"
                     41: #include "io.h"
                     42: #include "getopt.h"
1.11      pazsan     43: #ifdef STANDALONE
                     44: #include <systypes.h>
                     45: #endif
1.1       anton      46: 
                     47: #define PRIM_VERSION 1
                     48: /* increment this whenever the primitives change in an incompatible way */
                     49: 
1.14      pazsan     50: #ifndef DEFAULTPATH
1.16      pazsan     51: #  define DEFAULTPATH "~+"
1.14      pazsan     52: #endif
                     53: 
1.1       anton      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;
1.4       anton      72: int die_on_signal=0;
1.13      pazsan     73: #ifndef INCLUDE_IMAGE
1.1       anton      74: static int clear_dictionary=0;
1.13      pazsan     75: static size_t pagesize=0;
1.22    ! pazsan     76: char *progname;
        !            77: #else
        !            78: char *progname = "gforth";
        !            79: int optind = 1;
1.13      pazsan     80: #endif
1.1       anton      81: static int debug=0;
                     82: 
                     83: /* image file format:
1.15      pazsan     84:  *  "#! binary-path -i\n" (e.g., "#! /usr/local/bin/gforth-0.4.0 -i\n")
1.1       anton      85:  *   padding to a multiple of 8
1.15      pazsan     86:  *   magic: "Gforth2x" means format 0.4,
                     87:  *              where x is a byte with
                     88:  *              bit 7:   reserved = 0
                     89:  *              bit 6:5: address unit size 2^n octets
                     90:  *              bit 4:3: character size 2^n octets
                     91:  *              bit 2:1: cell size 2^n octets
                     92:  *              bit 0:   endian, big=0, little=1.
                     93:  *  The magic are always 8 octets, no matter what the native AU/character size is
1.1       anton      94:  *  padding to max alignment (no padding necessary on current machines)
                     95:  *  ImageHeader structure (see below)
                     96:  *  data (size in ImageHeader.image_size)
                     97:  *  tags ((if relocatable, 1 bit/data cell)
                     98:  *
                     99:  * tag==1 means that the corresponding word is an address;
                    100:  * If the word is >=0, the address is within the image;
                    101:  * addresses within the image are given relative to the start of the image.
                    102:  * If the word =-1 (CF_NIL), the address is NIL,
                    103:  * If the word is <CF_NIL and >CF(DODOES), it's a CFA (:, Create, ...)
                    104:  * If the word =CF(DODOES), it's a DOES> CFA
                    105:  * If the word =CF(DOESJUMP), it's a DOES JUMP (2 Cells after DOES>,
                    106:  *                                     possibly containing a jump to dodoes)
                    107:  * If the word is <CF(DOESJUMP), it's a primitive
                    108:  */
                    109: 
                    110: typedef struct {
                    111:   Address base;                /* base address of image (0 if relocatable) */
                    112:   UCell checksum;      /* checksum of ca's to protect against some
                    113:                           incompatible binary/executable combinations
                    114:                           (0 if relocatable) */
                    115:   UCell image_size;    /* all sizes in bytes */
                    116:   UCell dict_size;
                    117:   UCell data_stack_size;
                    118:   UCell fp_stack_size;
                    119:   UCell return_stack_size;
                    120:   UCell locals_stack_size;
                    121:   Xt *boot_entry;      /* initial ip for booting (in BOOT) */
                    122:   Xt *throw_entry;     /* ip after signal (in THROW) */
                    123:   Cell unused1;                /* possibly tib stack size */
                    124:   Cell unused2;
                    125:   Address data_stack_base; /* this and the following fields are initialized by the loader */
                    126:   Address fp_stack_base;
                    127:   Address return_stack_base;
                    128:   Address locals_stack_base;
                    129: } ImageHeader;
                    130: /* the image-header is created in main.fs */
                    131: 
1.10      pazsan    132: void relocate(Cell *image, const char *bitstring, int size, Label symbols[])
1.1       anton     133: {
1.16      pazsan    134:   int i=0, j, k, steps=(size/sizeof(Cell))/RELINFOBITS;
1.11      pazsan    135:   Cell token;
1.1       anton     136:   char bits;
                    137: /*   static char bits[8]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01};*/
                    138: 
                    139: /*  printf("relocating %x[%x]\n", image, size); */
                    140:    
                    141:   for(k=0; k<=steps; k++)
1.13      pazsan    142:     for(j=0, bits=bitstring[k]; j<RELINFOBITS; j++, i++, bits<<=1) {
1.1       anton     143:       /*      fprintf(stderr,"relocate: image[%d]\n", i);*/
1.13      pazsan    144:       if(bits & (1U << (RELINFOBITS-1))) {
1.1       anton     145:        /* fprintf(stderr,"relocate: image[%d]=%d\n", i, image[i]);*/
1.11      pazsan    146:        if((token=image[i])<0)
                    147:          switch(token)
1.1       anton     148:            {
                    149:            case CF_NIL      : image[i]=0; break;
                    150: #if !defined(DOUBLY_INDIRECT)
                    151:            case CF(DOCOL)   :
                    152:            case CF(DOVAR)   :
                    153:            case CF(DOCON)   :
                    154:            case CF(DOUSER)  : 
                    155:            case CF(DODEFER) : 
1.11      pazsan    156:            case CF(DOFIELD) : MAKE_CF(image+i,symbols[CF(token)]); break;
1.1       anton     157:            case CF(DOESJUMP): MAKE_DOES_HANDLER(image+i); break;
                    158: #endif /* !defined(DOUBLY_INDIRECT) */
                    159:            case CF(DODOES)  :
                    160:              MAKE_DOES_CF(image+i,image[i+1]+((Cell)image));
                    161:              break;
                    162:            default          :
                    163: /*           printf("Code field generation image[%x]:=CA(%x)\n",
                    164:                     i, CF(image[i])); */
1.11      pazsan    165:              image[i]=(Cell)CA(CF(token));
1.1       anton     166:            }
                    167:        else
                    168:          image[i]+=(Cell)image;
                    169:       }
                    170:     }
1.22    ! pazsan    171:   ((ImageHeader*)(image))->base = image;
1.1       anton     172: }
                    173: 
                    174: UCell checksum(Label symbols[])
                    175: {
                    176:   UCell r=PRIM_VERSION;
                    177:   Cell i;
                    178: 
                    179:   for (i=DOCOL; i<=DOESJUMP; i++) {
                    180:     r ^= (UCell)(symbols[i]);
                    181:     r = (r << 5) | (r >> (8*sizeof(Cell)-5));
                    182:   }
                    183: #ifdef DIRECT_THREADED
                    184:   /* we have to consider all the primitives */
                    185:   for (; symbols[i]!=(Label)0; i++) {
                    186:     r ^= (UCell)(symbols[i]);
                    187:     r = (r << 5) | (r >> (8*sizeof(Cell)-5));
                    188:   }
                    189: #else
                    190:   /* in indirect threaded code all primitives are accessed through the
                    191:      symbols table, so we just have to put the base address of symbols
                    192:      in the checksum */
                    193:   r ^= (UCell)symbols;
                    194: #endif
                    195:   return r;
                    196: }
                    197: 
1.3       anton     198: Address verbose_malloc(Cell size)
                    199: {
                    200:   Address r;
                    201:   /* leave a little room (64B) for stack underflows */
                    202:   if ((r = malloc(size+64))==NULL) {
                    203:     perror(progname);
                    204:     exit(1);
                    205:   }
                    206:   r = (Address)((((Cell)r)+(sizeof(Float)-1))&(-sizeof(Float)));
                    207:   if (debug)
                    208:     fprintf(stderr, "malloc succeeds, address=$%lx\n", (long)r);
                    209:   return r;
                    210: }
                    211: 
1.1       anton     212: Address my_alloc(Cell size)
                    213: {
1.5       jwilke    214: #if HAVE_MMAP
1.1       anton     215:   static Address next_address=0;
                    216:   Address r;
                    217: 
                    218: #if defined(MAP_ANON)
                    219:   if (debug)
                    220:     fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_ANON, ...); ", (long)next_address, (long)size);
                    221:   r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
                    222: #else /* !defined(MAP_ANON) */
1.17      anton     223:   /* Ultrix (at least) does not define MAP_FILE and MAP_PRIVATE (both are
                    224:      apparently defaults) */
1.1       anton     225: #ifndef MAP_FILE
                    226: # define MAP_FILE 0
                    227: #endif
                    228: #ifndef MAP_PRIVATE
                    229: # define MAP_PRIVATE 0
                    230: #endif
                    231:   static int dev_zero=-1;
                    232: 
                    233:   if (dev_zero == -1)
                    234:     dev_zero = open("/dev/zero", O_RDONLY);
                    235:   if (dev_zero == -1) {
                    236:     r = (Address)-1;
                    237:     if (debug)
                    238:       fprintf(stderr, "open(\"/dev/zero\"...) failed (%s), no mmap; ", 
                    239:              strerror(errno));
                    240:   } else {
                    241:     if (debug)
                    242:       fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FILE, dev_zero, ...); ", (long)next_address, (long)size);
                    243:     r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FILE|MAP_PRIVATE, dev_zero, 0);
                    244:   }
                    245: #endif /* !defined(MAP_ANON) */
                    246: 
                    247:   if (r != (Address)-1) {
                    248:     if (debug)
                    249:       fprintf(stderr, "success, address=$%lx\n", (long) r);
                    250:     if (pagesize != 0)
                    251:       next_address = (Address)(((((Cell)r)+size-1)&-pagesize)+2*pagesize); /* leave one page unmapped */
                    252:     return r;
                    253:   }
                    254:   if (debug)
                    255:     fprintf(stderr, "failed: %s\n", strerror(errno));
                    256: #endif /* HAVE_MMAP */
1.3       anton     257:   /* use malloc as fallback */
                    258:   return verbose_malloc(size);
1.1       anton     259: }
                    260: 
1.3       anton     261: #if (defined(mips) && !defined(INDIRECT_THREADED))
                    262: /* the 256MB jump restriction on the MIPS architecture makes the
                    263:    combination of direct threading and mmap unsafe. */
                    264: #define dict_alloc(size) verbose_malloc(size)
                    265: #else
                    266: #define dict_alloc(size) my_alloc(size)
                    267: #endif
                    268: 
1.10      pazsan    269: void set_stack_sizes(ImageHeader * header)
                    270: {
                    271:   if (dictsize==0)
                    272:     dictsize = header->dict_size;
                    273:   if (dsize==0)
                    274:     dsize = header->data_stack_size;
                    275:   if (rsize==0)
                    276:     rsize = header->return_stack_size;
                    277:   if (fsize==0)
                    278:     fsize = header->fp_stack_size;
                    279:   if (lsize==0)
                    280:     lsize = header->locals_stack_size;
                    281:   dictsize=maxaligned(dictsize);
                    282:   dsize=maxaligned(dsize);
                    283:   rsize=maxaligned(rsize);
                    284:   lsize=maxaligned(lsize);
                    285:   fsize=maxaligned(fsize);
                    286: }
                    287: 
                    288: void alloc_stacks(ImageHeader * header)
                    289: {
                    290:   header->dict_size=dictsize;
                    291:   header->data_stack_size=dsize;
                    292:   header->fp_stack_size=fsize;
                    293:   header->return_stack_size=rsize;
                    294:   header->locals_stack_size=lsize;
                    295: 
                    296:   header->data_stack_base=my_alloc(dsize);
                    297:   header->fp_stack_base=my_alloc(fsize);
                    298:   header->return_stack_base=my_alloc(rsize);
                    299:   header->locals_stack_base=my_alloc(lsize);
                    300: }
                    301: 
1.11      pazsan    302: int go_forth(Address image, int stack, Cell *entries)
                    303: {
1.18      anton     304:   ImageHeader *image_header = (ImageHeader *)image;
                    305:   Cell *sp0=(Cell*)(image_header->data_stack_base + dsize);
                    306:   Float *fp0=(Float *)(image_header->fp_stack_base + fsize);
                    307:   Cell *rp0=(Cell *)(image_header->return_stack_base + rsize);
                    308:   Address lp0=image_header->locals_stack_base + lsize;
                    309:   Xt *ip0=(Xt *)(image_header->boot_entry);
1.13      pazsan    310: #ifdef SYSSIGNALS
1.11      pazsan    311:   int throw_code;
1.13      pazsan    312: #endif
1.11      pazsan    313: 
                    314:   /* ensure that the cached elements (if any) are accessible */
1.18      anton     315:   IF_TOS(sp0--);
                    316:   IF_FTOS(fp0--);
1.11      pazsan    317:   
                    318:   for(;stack>0;stack--)
1.18      anton     319:     *--sp0=entries[stack-1];
1.11      pazsan    320: 
1.14      pazsan    321: #if !defined(MSDOS) && !defined(SHARC) && !defined(_WIN32) && !defined(__EMX__)
1.11      pazsan    322:   get_winsize();
                    323: #endif
                    324:    
1.13      pazsan    325: #ifdef SYSSIGNALS
1.11      pazsan    326:   install_signal_handlers(); /* right place? */
                    327:   
                    328:   if ((throw_code=setjmp(throw_jmp_buf))) {
                    329:     static Cell signal_data_stack[8];
                    330:     static Cell signal_return_stack[8];
                    331:     static Float signal_fp_stack[1];
1.13      pazsan    332: 
1.11      pazsan    333:     signal_data_stack[7]=throw_code;
1.18      anton     334: 
                    335: #ifdef GFORTH_DEBUGGING
                    336:     if (rp <= rp0 && rp > (Cell *)(image_header->return_stack_base+5)) {
                    337:       /* no rstack overflow or underflow */
                    338:       rp0 = rp;
                    339:       *--rp0 = ip;
                    340:     }
                    341:     else /* I love non-syntactic ifdefs :-) */
                    342: #endif
                    343:     rp0 = signal_return_stack+8;
1.11      pazsan    344:     
1.18      anton     345:     return((int)engine(image_header->throw_entry, signal_data_stack+7,
                    346:                       rp0, signal_fp_stack, 0));
1.11      pazsan    347:   }
1.13      pazsan    348: #endif
1.11      pazsan    349: 
1.18      anton     350:   return((int)engine(ip0,sp0,rp0,fp0,lp0));
1.11      pazsan    351: }
                    352: 
1.21      anton     353: 
                    354: void print_sizes(Cell sizebyte)
                    355:      /* print size information */
                    356: {
                    357:   static char* endianstring[]= { "   big","little" };
                    358:   
                    359:   fprintf(stderr,"%s endian, cell=%d bytes, char=%d bytes, au=%d bytes\n",
                    360:          endianstring[sizebyte & 1],
                    361:          1 << ((sizebyte >> 1) & 3),
                    362:          1 << ((sizebyte >> 3) & 3),
                    363:          1 << ((sizebyte >> 5) & 3));
                    364: }
                    365: 
1.11      pazsan    366: #ifndef INCLUDE_IMAGE
1.1       anton     367: Address loader(FILE *imagefile, char* filename)
                    368: /* returns the address of the image proper (after the preamble) */
                    369: {
                    370:   ImageHeader header;
                    371:   Address image;
                    372:   Address imp; /* image+preamble */
1.17      anton     373:   Char magic[8];
                    374:   char magic7; /* size byte of magic number */
1.1       anton     375:   Cell preamblesize=0;
                    376:   Label *symbols = engine(0,0,0,0,0);
1.6       pazsan    377:   Cell data_offset = offset_image ? 56*sizeof(Cell) : 0;
1.1       anton     378:   UCell check_sum;
1.15      pazsan    379:   Cell ausize = ((RELINFOBITS ==  8) ? 0 :
                    380:                 (RELINFOBITS == 16) ? 1 :
                    381:                 (RELINFOBITS == 32) ? 2 : 3);
                    382:   Cell charsize = ((sizeof(Char) == 1) ? 0 :
                    383:                   (sizeof(Char) == 2) ? 1 :
                    384:                   (sizeof(Char) == 4) ? 2 : 3) + ausize;
                    385:   Cell cellsize = ((sizeof(Cell) == 1) ? 0 :
                    386:                   (sizeof(Cell) == 2) ? 1 :
                    387:                   (sizeof(Cell) == 4) ? 2 : 3) + ausize;
1.21      anton     388:   Cell sizebyte = (ausize << 5) + (charsize << 3) + (cellsize << 1) +
                    389: #ifdef WORDS_BIGENDIAN
                    390:        0
                    391: #else
                    392:        1
                    393: #endif
                    394:     ;
1.1       anton     395: 
                    396: #ifndef DOUBLY_INDIRECT
                    397:   check_sum = checksum(symbols);
                    398: #else /* defined(DOUBLY_INDIRECT) */
                    399:   check_sum = (UCell)symbols;
                    400: #endif /* defined(DOUBLY_INDIRECT) */
1.10      pazsan    401:   
                    402:   do {
                    403:     if(fread(magic,sizeof(Char),8,imagefile) < 8) {
1.15      pazsan    404:       fprintf(stderr,"%s: image %s doesn't seem to be a Gforth (>=0.4) image.\n",
1.10      pazsan    405:              progname, filename);
                    406:       exit(1);
1.1       anton     407:     }
1.10      pazsan    408:     preamblesize+=8;
1.15      pazsan    409:   } while(memcmp(magic,"Gforth2",7));
1.17      anton     410:   magic7 = magic[7];
1.1       anton     411:   if (debug) {
1.17      anton     412:     magic[7]='\0';
1.21      anton     413:     fprintf(stderr,"Magic found: %s ", magic);
                    414:     print_sizes(magic7);
1.1       anton     415:   }
                    416: 
1.21      anton     417:   if (magic7 != sizebyte)
                    418:     {
                    419:       fprintf(stderr,"This image is:         ");
                    420:       print_sizes(magic7);
                    421:       fprintf(stderr,"whereas the machine is ");
                    422:       print_sizes(sizebyte);
1.1       anton     423:       exit(-2);
                    424:     };
                    425: 
                    426:   fread((void *)&header,sizeof(ImageHeader),1,imagefile);
1.10      pazsan    427: 
                    428:   set_stack_sizes(&header);
1.1       anton     429:   
                    430: #if HAVE_GETPAGESIZE
                    431:   pagesize=getpagesize(); /* Linux/GNU libc offers this */
                    432: #elif HAVE_SYSCONF && defined(_SC_PAGESIZE)
                    433:   pagesize=sysconf(_SC_PAGESIZE); /* POSIX.4 */
                    434: #elif PAGESIZE
                    435:   pagesize=PAGESIZE; /* in limits.h according to Gallmeister's POSIX.4 book */
                    436: #endif
                    437:   if (debug)
1.5       jwilke    438:     fprintf(stderr,"pagesize=%ld\n",(unsigned long) pagesize);
1.1       anton     439: 
1.3       anton     440:   image = dict_alloc(preamblesize+dictsize+data_offset)+data_offset;
1.1       anton     441:   rewind(imagefile);  /* fseek(imagefile,0L,SEEK_SET); */
                    442:   if (clear_dictionary)
1.10      pazsan    443:     memset(image, 0, dictsize);
                    444:   fread(image, 1, preamblesize+header.image_size, imagefile);
1.1       anton     445:   imp=image+preamblesize;
                    446:   if(header.base==0) {
                    447:     Cell reloc_size=((header.image_size-1)/sizeof(Cell))/8+1;
                    448:     char reloc_bits[reloc_size];
1.10      pazsan    449:     fread(reloc_bits, 1, reloc_size, imagefile);
                    450:     relocate((Cell *)imp, reloc_bits, header.image_size, symbols);
1.1       anton     451: #if 0
                    452:     { /* let's see what the relocator did */
                    453:       FILE *snapshot=fopen("snapshot.fi","wb");
                    454:       fwrite(image,1,imagesize,snapshot);
                    455:       fclose(snapshot);
                    456:     }
                    457: #endif
                    458:   }
                    459:   else if(header.base!=imp) {
                    460:     fprintf(stderr,"%s: Cannot load nonrelocatable image (compiled for address $%lx) at address $%lx\n",
                    461:            progname, (unsigned long)header.base, (unsigned long)imp);
                    462:     exit(1);
                    463:   }
                    464:   if (header.checksum==0)
                    465:     ((ImageHeader *)imp)->checksum=check_sum;
                    466:   else if (header.checksum != check_sum) {
                    467:     fprintf(stderr,"%s: Checksum of image ($%lx) does not match the executable ($%lx)\n",
                    468:            progname, (unsigned long)(header.checksum),(unsigned long)check_sum);
                    469:     exit(1);
                    470:   }
                    471:   fclose(imagefile);
                    472: 
1.10      pazsan    473:   alloc_stacks((ImageHeader *)imp);
1.1       anton     474: 
                    475:   CACHE_FLUSH(imp, header.image_size);
                    476: 
                    477:   return imp;
                    478: }
                    479: 
                    480: int onlypath(char *file)
1.10      pazsan    481: {
                    482:   int i;
1.1       anton     483:   i=strlen(file);
1.10      pazsan    484:   while (i) {
                    485:     if (file[i]=='\\' || file[i]=='/') break;
                    486:     i--;
                    487:   }
                    488:   return i;
1.1       anton     489: }
                    490: 
                    491: FILE *openimage(char *fullfilename)
1.10      pazsan    492: {
                    493:   FILE *image_file;
                    494: 
1.1       anton     495:   image_file=fopen(fullfilename,"rb");
                    496:   if (image_file!=NULL && debug)
1.10      pazsan    497:     fprintf(stderr, "Opened image file: %s\n", fullfilename);
                    498:   return image_file;
1.1       anton     499: }
                    500: 
                    501: FILE *checkimage(char *path, int len, char *imagename)
1.10      pazsan    502: {
                    503:   int dirlen=len;
1.1       anton     504:   char fullfilename[dirlen+strlen(imagename)+2];
1.10      pazsan    505: 
1.1       anton     506:   memcpy(fullfilename, path, dirlen);
                    507:   if (fullfilename[dirlen-1]!='/')
                    508:     fullfilename[dirlen++]='/';
                    509:   strcpy(fullfilename+dirlen,imagename);
1.10      pazsan    510:   return openimage(fullfilename);
1.1       anton     511: }
                    512: 
1.10      pazsan    513: FILE * open_image_file(char * imagename, char * path)
1.1       anton     514: {
1.10      pazsan    515:   FILE * image_file=NULL;
                    516:   
                    517:   if(strchr(imagename, '/')==NULL) {
                    518:     /* first check the directory where the exe file is in !! 01may97jaw */
                    519:     if (onlypath(progname))
                    520:       image_file=checkimage(progname, onlypath(progname), imagename);
                    521:     if (!image_file)
                    522:       do {
                    523:        char *pend=strchr(path, PATHSEP);
                    524:        if (pend==NULL)
                    525:          pend=path+strlen(path);
                    526:        if (strlen(path)==0) break;
                    527:        image_file=checkimage(path, pend-path, imagename);
                    528:        path=pend+(*pend==PATHSEP);
                    529:       } while (image_file==NULL);
                    530:   } else {
                    531:     image_file=openimage(imagename);
                    532:   }
1.1       anton     533: 
1.10      pazsan    534:   if (!image_file) {
                    535:     fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n",
                    536:            progname, imagename, path);
                    537:     exit(1);
1.7       anton     538:   }
                    539: 
1.10      pazsan    540:   return image_file;
                    541: }
1.11      pazsan    542: #endif
                    543: 
                    544: #ifdef HAS_OS
                    545: UCell convsize(char *s, UCell elemsize)
                    546: /* converts s of the format [0-9]+[bekMGT]? (e.g. 25k) into the number
                    547:    of bytes.  the letter at the end indicates the unit, where e stands
                    548:    for the element size. default is e */
                    549: {
                    550:   char *endp;
                    551:   UCell n,m;
                    552: 
                    553:   m = elemsize;
                    554:   n = strtoul(s,&endp,0);
                    555:   if (endp!=NULL) {
                    556:     if (strcmp(endp,"b")==0)
                    557:       m=1;
                    558:     else if (strcmp(endp,"k")==0)
                    559:       m=1024;
                    560:     else if (strcmp(endp,"M")==0)
                    561:       m=1024*1024;
                    562:     else if (strcmp(endp,"G")==0)
                    563:       m=1024*1024*1024;
                    564:     else if (strcmp(endp,"T")==0) {
                    565: #if (SIZEOF_CHAR_P > 4)
                    566:       m=1024*1024*1024*1024;
                    567: #else
                    568:       fprintf(stderr,"%s: size specification \"%s\" too large for this machine\n", progname, endp);
                    569:       exit(1);
                    570: #endif
                    571:     } else if (strcmp(endp,"e")!=0 && strcmp(endp,"")!=0) {
                    572:       fprintf(stderr,"%s: cannot grok size specification %s: invalid unit \"%s\"\n", progname, s, endp);
                    573:       exit(1);
                    574:     }
                    575:   }
                    576:   return n*m;
                    577: }
1.10      pazsan    578: 
                    579: void gforth_args(int argc, char ** argv, char ** path, char ** imagename)
                    580: {
                    581:   int c;
                    582: 
1.1       anton     583:   opterr=0;
                    584:   while (1) {
                    585:     int option_index=0;
                    586:     static struct option opts[] = {
                    587:       {"image-file", required_argument, NULL, 'i'},
                    588:       {"dictionary-size", required_argument, NULL, 'm'},
                    589:       {"data-stack-size", required_argument, NULL, 'd'},
                    590:       {"return-stack-size", required_argument, NULL, 'r'},
                    591:       {"fp-stack-size", required_argument, NULL, 'f'},
                    592:       {"locals-stack-size", required_argument, NULL, 'l'},
                    593:       {"path", required_argument, NULL, 'p'},
                    594:       {"version", no_argument, NULL, 'v'},
                    595:       {"help", no_argument, NULL, 'h'},
                    596:       /* put something != 0 into offset_image */
                    597:       {"offset-image", no_argument, &offset_image, 1},
                    598:       {"no-offset-im", no_argument, &offset_image, 0},
                    599:       {"clear-dictionary", no_argument, &clear_dictionary, 1},
1.4       anton     600:       {"die-on-signal", no_argument, &die_on_signal, 1},
1.1       anton     601:       {"debug", no_argument, &debug, 1},
                    602:       {0,0,0,0}
                    603:       /* no-init-file, no-rc? */
                    604:     };
                    605:     
                    606:     c = getopt_long(argc, argv, "+i:m:d:r:f:l:p:vh", opts, &option_index);
                    607:     
                    608:     if (c==EOF)
                    609:       break;
                    610:     if (c=='?') {
                    611:       optind--;
                    612:       break;
                    613:     }
                    614:     switch (c) {
1.10      pazsan    615:     case 'i': *imagename = optarg; break;
1.1       anton     616:     case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
                    617:     case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
                    618:     case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
                    619:     case 'f': fsize = convsize(optarg,sizeof(Float)); break;
                    620:     case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
1.10      pazsan    621:     case 'p': *path = optarg; break;
1.8       anton     622:     case 'v': fprintf(stderr, "gforth %s\n", VERSION); exit(0);
1.1       anton     623:     case 'h': 
                    624:       fprintf(stderr, "Usage: %s [engine options] [image arguments]\n\
                    625: Engine Options:\n\
1.10      pazsan    626:   --clear-dictionary               Initialize the dictionary with 0 bytes\n\
                    627:   -d SIZE, --data-stack-size=SIZE   Specify data stack size\n\
                    628:   --debug                          Print debugging information during startup\n\
                    629:   --die-on-signal                  exit instead of CATCHing some signals\n\
                    630:   -f SIZE, --fp-stack-size=SIZE            Specify floating point stack size\n\
                    631:   -h, --help                       Print this message and exit\n\
                    632:   -i FILE, --image-file=FILE       Use image FILE instead of `gforth.fi'\n\
                    633:   -l SIZE, --locals-stack-size=SIZE Specify locals stack size\n\
                    634:   -m SIZE, --dictionary-size=SIZE   Specify Forth dictionary size\n\
                    635:   --no-offset-im                   Load image at normal position\n\
                    636:   --offset-image                   Load image at a different position\n\
                    637:   -p PATH, --path=PATH             Search path for finding image and sources\n\
                    638:   -r SIZE, --return-stack-size=SIZE Specify return stack size\n\
                    639:   -v, --version                            Print version and exit\n\
1.1       anton     640: SIZE arguments consist of an integer followed by a unit. The unit can be\n\
1.10      pazsan    641:   `b' (byte), `e' (element; default), `k' (KB), `M' (MB), `G' (GB) or `T' (TB).\n",
                    642:              argv[0]);
                    643:       optind--;
                    644:       return;
                    645:       exit(0);
1.1       anton     646:     }
                    647:   }
1.10      pazsan    648: }
1.11      pazsan    649: #endif
1.10      pazsan    650: 
                    651: #ifdef INCLUDE_IMAGE
                    652: extern Cell image[];
                    653: extern const char reloc_bits[];
                    654: #endif
                    655: 
                    656: int main(int argc, char **argv, char **env)
                    657: {
                    658:   char *path = getenv("GFORTHPATH") ? : DEFAULTPATH;
1.13      pazsan    659: #ifndef INCLUDE_IMAGE
1.10      pazsan    660:   char *imagename="gforth.fi";
                    661:   FILE *image_file;
                    662:   Address image;
                    663: #endif
                    664:   int retvalue;
                    665:          
                    666: #if defined(i386) && defined(ALIGNMENT_CHECK) && !defined(DIRECT_THREADED)
                    667:   /* turn on alignment checks on the 486.
                    668:    * on the 386 this should have no effect. */
                    669:   __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
                    670:   /* this is unusable with Linux' libc.4.6.27, because this library is
                    671:      not alignment-clean; we would have to replace some library
                    672:      functions (e.g., memcpy) to make it work. Also GCC doesn't try to keep
                    673:      the stack FP-aligned. */
                    674: #endif
                    675: 
                    676:   /* buffering of the user output device */
1.11      pazsan    677: #ifdef _IONBF
1.10      pazsan    678:   if (isatty(fileno(stdout))) {
                    679:     fflush(stdout);
                    680:     setvbuf(stdout,NULL,_IONBF,0);
1.1       anton     681:   }
1.11      pazsan    682: #endif
1.1       anton     683: 
1.10      pazsan    684:   progname = argv[0];
                    685: 
1.11      pazsan    686: #ifdef HAS_OS
1.10      pazsan    687:   gforth_args(argc, argv, &path, &imagename);
1.11      pazsan    688: #endif
1.10      pazsan    689: 
                    690: #ifdef INCLUDE_IMAGE
                    691:   set_stack_sizes((ImageHeader *)image);
1.22    ! pazsan    692:   if(((ImageHeader *)image)->base != image)
        !           693:     relocate(image, reloc_bits, ((ImageHeader *)image)->image_size,
        !           694:             (Label*)engine(0, 0, 0, 0, 0));
1.10      pazsan    695:   alloc_stacks((ImageHeader *)image);
                    696: #else
                    697:   image_file = open_image_file(imagename, path);
                    698:   image = loader(image_file, imagename);
                    699: #endif
1.1       anton     700: 
                    701:   {
1.10      pazsan    702:     char path2[strlen(path)+1];
1.1       anton     703:     char *p1, *p2;
                    704:     Cell environ[]= {
                    705:       (Cell)argc-(optind-1),
                    706:       (Cell)(argv+(optind-1)),
1.10      pazsan    707:       (Cell)strlen(path),
1.1       anton     708:       (Cell)path2};
                    709:     argv[optind-1] = progname;
                    710:     /*
                    711:        for (i=0; i<environ[0]; i++)
                    712:        printf("%s\n", ((char **)(environ[1]))[i]);
                    713:        */
                    714:     /* make path OS-independent by replacing path separators with NUL */
1.10      pazsan    715:     for (p1=path, p2=path2; *p1!='\0'; p1++, p2++)
1.1       anton     716:       if (*p1==PATHSEP)
                    717:        *p2 = '\0';
                    718:       else
                    719:        *p2 = *p1;
                    720:     *p2='\0';
1.10      pazsan    721:     retvalue = go_forth(image, 4, environ);
1.1       anton     722:     deprep_terminal();
                    723:   }
1.13      pazsan    724:   return retvalue;
1.1       anton     725: }

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