Annotation of gforth/engine/main.c, revision 1.98

1.1       anton       1: /* command line interpretation, image loading etc. for Gforth
                      2: 
                      3: 
1.96      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"
1.82      anton      24: #include "forth.h"
1.1       anton      25: #include <errno.h>
                     26: #include <ctype.h>
                     27: #include <stdio.h>
1.2       pazsan     28: #include <unistd.h>
1.1       anton      29: #include <string.h>
                     30: #include <math.h>
                     31: #include <sys/types.h>
1.32      pazsan     32: #ifndef STANDALONE
1.1       anton      33: #include <sys/stat.h>
1.32      pazsan     34: #endif
1.1       anton      35: #include <fcntl.h>
                     36: #include <assert.h>
                     37: #include <stdlib.h>
1.11      pazsan     38: #ifndef STANDALONE
1.1       anton      39: #if HAVE_SYS_MMAN_H
                     40: #include <sys/mman.h>
                     41: #endif
1.11      pazsan     42: #endif
1.1       anton      43: #include "io.h"
                     44: #include "getopt.h"
1.11      pazsan     45: #ifdef STANDALONE
                     46: #include <systypes.h>
                     47: #endif
1.1       anton      48: 
1.79      anton      49: /* global variables for engine.c 
                     50:    We put them here because engine.c is compiled several times in
                     51:    different ways for the same engine. */
                     52: Cell *SP;
                     53: Float *FP;
                     54: Address UP=NULL;
                     55: 
                     56: #ifdef GFORTH_DEBUGGING
                     57: /* define some VM registers as global variables, so they survive exceptions;
                     58:    global register variables are not up to the task (according to the 
                     59:    GNU C manual) */
                     60: Xt *saved_ip;
                     61: Cell *rp;
                     62: #endif
                     63: 
                     64: #ifdef NO_IP
                     65: Label next_code;
                     66: #endif
                     67: 
                     68: #ifdef HAS_FILE
                     69: char* fileattr[6]={"rb","rb","r+b","r+b","wb","wb"};
                     70: char* pfileattr[6]={"r","r","r+","r+","w","w"};
                     71: 
                     72: #ifndef O_BINARY
                     73: #define O_BINARY 0
                     74: #endif
                     75: #ifndef O_TEXT
                     76: #define O_TEXT 0
                     77: #endif
                     78: 
                     79: int ufileattr[6]= {
                     80:   O_RDONLY|O_BINARY, O_RDONLY|O_BINARY,
                     81:   O_RDWR  |O_BINARY, O_RDWR  |O_BINARY,
                     82:   O_WRONLY|O_BINARY, O_WRONLY|O_BINARY };
                     83: #endif
                     84: /* end global vars for engine.c */
                     85: 
1.1       anton      86: #define PRIM_VERSION 1
                     87: /* increment this whenever the primitives change in an incompatible way */
                     88: 
1.14      pazsan     89: #ifndef DEFAULTPATH
1.39      anton      90: #  define DEFAULTPATH "."
1.14      pazsan     91: #endif
                     92: 
1.1       anton      93: #ifdef MSDOS
                     94: jmp_buf throw_jmp_buf;
                     95: #endif
                     96: 
1.56      anton      97: #if defined(DOUBLY_INDIRECT)
                     98: #  define CFA(n)       ({Cell _n = (n); ((Cell)(((_n & 0x4000) ? symbols : xts)+(_n&~0x4000UL)));})
1.1       anton      99: #else
1.56      anton     100: #  define CFA(n)       ((Cell)(symbols+((n)&~0x4000UL)))
1.1       anton     101: #endif
                    102: 
                    103: #define maxaligned(n)  (typeof(n))((((Cell)n)+sizeof(Float)-1)&-sizeof(Float))
                    104: 
                    105: static UCell dictsize=0;
                    106: static UCell dsize=0;
                    107: static UCell rsize=0;
                    108: static UCell fsize=0;
                    109: static UCell lsize=0;
                    110: int offset_image=0;
1.4       anton     111: int die_on_signal=0;
1.13      pazsan    112: #ifndef INCLUDE_IMAGE
1.1       anton     113: static int clear_dictionary=0;
1.24      anton     114: UCell pagesize=1;
1.22      pazsan    115: char *progname;
                    116: #else
                    117: char *progname = "gforth";
                    118: int optind = 1;
1.13      pazsan    119: #endif
1.31      pazsan    120: 
1.97      anton     121: #define CODE_BLOCK_SIZE (256*1024)
1.48      anton     122: Address code_area=0;
1.73      anton     123: Cell code_area_size = CODE_BLOCK_SIZE;
1.75      anton     124: Address code_here=NULL+CODE_BLOCK_SIZE; /* does for code-area what HERE
                    125:                                           does for the dictionary */
1.65      anton     126: Address start_flush=0; /* start of unflushed code */
1.74      anton     127: Cell last_jump=0; /* if the last prim was compiled without jump, this
                    128:                      is it's number, otherwise this contains 0 */
1.48      anton     129: 
1.60      anton     130: static int no_super=0;   /* true if compile_prim should not fuse prims */
1.81      anton     131: static int no_dynamic=NO_DYNAMIC_DEFAULT; /* if true, no code is generated
                    132:                                             dynamically */
1.60      anton     133: 
1.30      pazsan    134: #ifdef HAS_DEBUG
1.68      anton     135: int debug=0;
1.31      pazsan    136: #else
                    137: # define perror(x...)
                    138: # define fprintf(x...)
1.30      pazsan    139: #endif
1.31      pazsan    140: 
1.24      anton     141: ImageHeader *gforth_header;
1.43      anton     142: Label *vm_prims;
1.53      anton     143: #ifdef DOUBLY_INDIRECT
                    144: Label *xts; /* same content as vm_prims, but should only be used for xts */
                    145: #endif
1.1       anton     146: 
1.30      pazsan    147: #ifdef MEMCMP_AS_SUBROUTINE
                    148: int gforth_memcmp(const char * s1, const char * s2, size_t n)
                    149: {
                    150:   return memcmp(s1, s2, n);
                    151: }
                    152: #endif
                    153: 
1.1       anton     154: /* image file format:
1.15      pazsan    155:  *  "#! binary-path -i\n" (e.g., "#! /usr/local/bin/gforth-0.4.0 -i\n")
1.1       anton     156:  *   padding to a multiple of 8
1.84      anton     157:  *   magic: "Gforth3x" means format 0.6,
1.15      pazsan    158:  *              where x is a byte with
                    159:  *              bit 7:   reserved = 0
                    160:  *              bit 6:5: address unit size 2^n octets
                    161:  *              bit 4:3: character size 2^n octets
                    162:  *              bit 2:1: cell size 2^n octets
                    163:  *              bit 0:   endian, big=0, little=1.
                    164:  *  The magic are always 8 octets, no matter what the native AU/character size is
1.1       anton     165:  *  padding to max alignment (no padding necessary on current machines)
1.24      anton     166:  *  ImageHeader structure (see forth.h)
1.1       anton     167:  *  data (size in ImageHeader.image_size)
                    168:  *  tags ((if relocatable, 1 bit/data cell)
                    169:  *
                    170:  * tag==1 means that the corresponding word is an address;
                    171:  * If the word is >=0, the address is within the image;
                    172:  * addresses within the image are given relative to the start of the image.
                    173:  * If the word =-1 (CF_NIL), the address is NIL,
                    174:  * If the word is <CF_NIL and >CF(DODOES), it's a CFA (:, Create, ...)
                    175:  * If the word =CF(DODOES), it's a DOES> CFA
                    176:  * If the word =CF(DOESJUMP), it's a DOES JUMP (2 Cells after DOES>,
                    177:  *                                     possibly containing a jump to dodoes)
1.51      anton     178:  * If the word is <CF(DOESJUMP) and bit 14 is set, it's the xt of a primitive
                    179:  * If the word is <CF(DOESJUMP) and bit 14 is clear, 
                    180:  *                                        it's the threaded code of a primitive
1.85      pazsan    181:  * bits 13..9 of a primitive token state which group the primitive belongs to,
                    182:  * bits 8..0 of a primitive token index into the group
1.1       anton     183:  */
                    184: 
1.85      pazsan    185: static Cell groups[32] = {
                    186:   0,
1.90      anton     187: #undef GROUP
1.85      pazsan    188: #define GROUP(x, n) DOESJUMP+1+n,
1.86      anton     189: #include "prim_grp.i"
1.90      anton     190: #undef GROUP
1.85      pazsan    191: #define GROUP(x, n)
                    192: };
                    193: 
1.46      jwilke    194: void relocate(Cell *image, const char *bitstring, 
1.90      anton     195:               int size, Cell base, Label symbols[])
1.1       anton     196: {
1.16      pazsan    197:   int i=0, j, k, steps=(size/sizeof(Cell))/RELINFOBITS;
1.11      pazsan    198:   Cell token;
1.1       anton     199:   char bits;
1.37      anton     200:   Cell max_symbols;
1.46      jwilke    201:   /* 
1.85      pazsan    202:    * A virtual start address that's the real start address minus 
1.46      jwilke    203:    * the one in the image 
                    204:    */
1.45      jwilke    205:   Cell *start = (Cell * ) (((void *) image) - ((void *) base));
1.1       anton     206: 
1.85      pazsan    207:   /* group index into table */
1.46      jwilke    208:   
                    209: /* printf("relocating to %x[%x] start=%x base=%x\n", image, size, start, base); */
1.37      anton     210:   
                    211:   for (max_symbols=DOESJUMP+1; symbols[max_symbols]!=0; max_symbols++)
                    212:     ;
1.47      anton     213:   max_symbols--;
1.35      pazsan    214:   size/=sizeof(Cell);
                    215: 
1.31      pazsan    216:   for(k=0; k<=steps; k++) {
1.13      pazsan    217:     for(j=0, bits=bitstring[k]; j<RELINFOBITS; j++, i++, bits<<=1) {
1.1       anton     218:       /*      fprintf(stderr,"relocate: image[%d]\n", i);*/
1.35      pazsan    219:       if((i < size) && (bits & (1U << (RELINFOBITS-1)))) {
                    220:        /* fprintf(stderr,"relocate: image[%d]=%d of %d\n", i, image[i], size/sizeof(Cell)); */
1.45      jwilke    221:         token=image[i];
1.85      pazsan    222:        if(token<0) {
                    223:          int group = (-token & 0x3E00) >> 9;
                    224:          if(group == 0) {
                    225:            switch(token|0x4000) {
1.1       anton     226:            case CF_NIL      : image[i]=0; break;
                    227: #if !defined(DOUBLY_INDIRECT)
                    228:            case CF(DOCOL)   :
                    229:            case CF(DOVAR)   :
                    230:            case CF(DOCON)   :
                    231:            case CF(DOUSER)  : 
                    232:            case CF(DODEFER) : 
1.11      pazsan    233:            case CF(DOFIELD) : MAKE_CF(image+i,symbols[CF(token)]); break;
1.92      anton     234:            case CF(DOESJUMP): image[i]=0; break;
1.1       anton     235: #endif /* !defined(DOUBLY_INDIRECT) */
                    236:            case CF(DODOES)  :
1.45      jwilke    237:              MAKE_DOES_CF(image+i,(Xt *)(image[i+1]+((Cell)start)));
1.1       anton     238:              break;
1.85      pazsan    239:            default          : /* backward compatibility */
1.56      anton     240: /*           printf("Code field generation image[%x]:=CFA(%x)\n",
1.1       anton     241:                     i, CF(image[i])); */
1.55      anton     242:              if (CF((token | 0x4000))<max_symbols) {
1.56      anton     243:                image[i]=(Cell)CFA(CF(token));
                    244: #ifdef DIRECT_THREADED
                    245:                if ((token & 0x4000) == 0) /* threade code, no CFA */
1.70      anton     246:                  compile_prim1(&image[i]);
1.56      anton     247: #endif
1.55      anton     248:              } else
1.98    ! anton     249:                fprintf(stderr,"Primitive %ld used in this image at $%lx is not implemented by this\n engine (%s); executing this code will crash.\n",(long)CF(token),(long)&image[i],PACKAGE_VERSION);
1.1       anton     250:            }
1.85      pazsan    251:          } else {
                    252:            int tok = -token & 0x1FF;
                    253:            if (tok < (groups[group+1]-groups[group])) {
                    254: #if defined(DOUBLY_INDIRECT)
                    255:              image[i]=(Cell)CFA(((groups[group]+tok) | (CF(token) & 0x4000)));
                    256: #else
                    257:              image[i]=(Cell)CFA((groups[group]+tok));
                    258: #endif
                    259: #ifdef DIRECT_THREADED
                    260:              if ((token & 0x4000) == 0) /* threade code, no CFA */
                    261:                compile_prim1(&image[i]);
                    262: #endif
                    263:            } else
1.98    ! anton     264:              fprintf(stderr,"Primitive %lx, %d of group %d used in this image at $%lx is not implemented by this\n engine (%s); executing this code will crash.\n", (long)-token, tok, group, (long)&image[i],PACKAGE_VERSION);
1.85      pazsan    265:          }
                    266:        } else {
1.45      jwilke    267:           // if base is > 0: 0 is a null reference so don't adjust
                    268:           if (token>=base) {
                    269:             image[i]+=(Cell)start;
                    270:           }
1.46      jwilke    271:         }
1.1       anton     272:       }
                    273:     }
1.31      pazsan    274:   }
1.70      anton     275:   finish_code();
1.26      jwilke    276:   ((ImageHeader*)(image))->base = (Address) image;
1.1       anton     277: }
                    278: 
                    279: UCell checksum(Label symbols[])
                    280: {
                    281:   UCell r=PRIM_VERSION;
                    282:   Cell i;
                    283: 
                    284:   for (i=DOCOL; i<=DOESJUMP; i++) {
                    285:     r ^= (UCell)(symbols[i]);
                    286:     r = (r << 5) | (r >> (8*sizeof(Cell)-5));
                    287:   }
                    288: #ifdef DIRECT_THREADED
                    289:   /* we have to consider all the primitives */
                    290:   for (; symbols[i]!=(Label)0; i++) {
                    291:     r ^= (UCell)(symbols[i]);
                    292:     r = (r << 5) | (r >> (8*sizeof(Cell)-5));
                    293:   }
                    294: #else
                    295:   /* in indirect threaded code all primitives are accessed through the
                    296:      symbols table, so we just have to put the base address of symbols
                    297:      in the checksum */
                    298:   r ^= (UCell)symbols;
                    299: #endif
                    300:   return r;
                    301: }
                    302: 
1.3       anton     303: Address verbose_malloc(Cell size)
                    304: {
                    305:   Address r;
                    306:   /* leave a little room (64B) for stack underflows */
                    307:   if ((r = malloc(size+64))==NULL) {
                    308:     perror(progname);
                    309:     exit(1);
                    310:   }
                    311:   r = (Address)((((Cell)r)+(sizeof(Float)-1))&(-sizeof(Float)));
                    312:   if (debug)
                    313:     fprintf(stderr, "malloc succeeds, address=$%lx\n", (long)r);
                    314:   return r;
                    315: }
                    316: 
1.33      anton     317: static Address next_address=0;
                    318: void after_alloc(Address r, Cell size)
                    319: {
                    320:   if (r != (Address)-1) {
                    321:     if (debug)
                    322:       fprintf(stderr, "success, address=$%lx\n", (long) r);
                    323:     if (pagesize != 1)
                    324:       next_address = (Address)(((((Cell)r)+size-1)&-pagesize)+2*pagesize); /* leave one page unmapped */
                    325:   } else {
                    326:     if (debug)
                    327:       fprintf(stderr, "failed: %s\n", strerror(errno));
                    328:   }
                    329: }
                    330: 
1.34      anton     331: #ifndef MAP_FAILED
                    332: #define MAP_FAILED ((Address) -1)
                    333: #endif
                    334: #ifndef MAP_FILE
                    335: # define MAP_FILE 0
                    336: #endif
                    337: #ifndef MAP_PRIVATE
                    338: # define MAP_PRIVATE 0
                    339: #endif
1.91      anton     340: #if !defined(MAP_ANON) && defined(MAP_ANONYMOUS)
                    341: # define MAP_ANON MAP_ANONYMOUS
                    342: #endif
1.34      anton     343: 
                    344: #if defined(HAVE_MMAP)
                    345: static Address alloc_mmap(Cell size)
1.1       anton     346: {
                    347:   Address r;
                    348: 
                    349: #if defined(MAP_ANON)
                    350:   if (debug)
                    351:     fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_ANON, ...); ", (long)next_address, (long)size);
1.34      anton     352:   r = mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
1.1       anton     353: #else /* !defined(MAP_ANON) */
1.17      anton     354:   /* Ultrix (at least) does not define MAP_FILE and MAP_PRIVATE (both are
                    355:      apparently defaults) */
1.1       anton     356:   static int dev_zero=-1;
                    357: 
                    358:   if (dev_zero == -1)
                    359:     dev_zero = open("/dev/zero", O_RDONLY);
                    360:   if (dev_zero == -1) {
1.34      anton     361:     r = MAP_FAILED;
1.1       anton     362:     if (debug)
                    363:       fprintf(stderr, "open(\"/dev/zero\"...) failed (%s), no mmap; ", 
                    364:              strerror(errno));
                    365:   } else {
                    366:     if (debug)
                    367:       fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FILE, dev_zero, ...); ", (long)next_address, (long)size);
                    368:     r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FILE|MAP_PRIVATE, dev_zero, 0);
                    369:   }
                    370: #endif /* !defined(MAP_ANON) */
1.34      anton     371:   after_alloc(r, size);
                    372:   return r;  
                    373: }
                    374: #endif
                    375: 
                    376: Address my_alloc(Cell size)
                    377: {
                    378: #if HAVE_MMAP
                    379:   Address r;
                    380: 
                    381:   r=alloc_mmap(size);
                    382:   if (r!=MAP_FAILED)
1.1       anton     383:     return r;
                    384: #endif /* HAVE_MMAP */
1.3       anton     385:   /* use malloc as fallback */
                    386:   return verbose_malloc(size);
1.1       anton     387: }
                    388: 
1.34      anton     389: Address dict_alloc_read(FILE *file, Cell imagesize, Cell dictsize, Cell offset)
1.33      anton     390: {
1.34      anton     391:   Address image = MAP_FAILED;
1.33      anton     392: 
1.56      anton     393: #if defined(HAVE_MMAP)
1.33      anton     394:   if (offset==0) {
1.34      anton     395:     image=alloc_mmap(dictsize);
1.33      anton     396:     if (debug)
1.34      anton     397:       fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FIXED|MAP_FILE, imagefile, 0); ", (long)image, (long)imagesize);
                    398:     image = mmap(image, imagesize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FIXED|MAP_FILE|MAP_PRIVATE, fileno(file), 0);
                    399:     after_alloc(image,dictsize);
1.33      anton     400:   }
1.56      anton     401: #endif /* defined(HAVE_MMAP) */
1.34      anton     402:   if (image == MAP_FAILED) {
1.56      anton     403:     image = my_alloc(dictsize+offset)+offset;
1.33      anton     404:     rewind(file);  /* fseek(imagefile,0L,SEEK_SET); */
1.34      anton     405:     fread(image, 1, imagesize, file);
1.33      anton     406:   }
                    407:   return image;
                    408: }
                    409: 
1.10      pazsan    410: void set_stack_sizes(ImageHeader * header)
                    411: {
                    412:   if (dictsize==0)
                    413:     dictsize = header->dict_size;
                    414:   if (dsize==0)
                    415:     dsize = header->data_stack_size;
                    416:   if (rsize==0)
                    417:     rsize = header->return_stack_size;
                    418:   if (fsize==0)
                    419:     fsize = header->fp_stack_size;
                    420:   if (lsize==0)
                    421:     lsize = header->locals_stack_size;
                    422:   dictsize=maxaligned(dictsize);
                    423:   dsize=maxaligned(dsize);
                    424:   rsize=maxaligned(rsize);
                    425:   lsize=maxaligned(lsize);
                    426:   fsize=maxaligned(fsize);
                    427: }
                    428: 
                    429: void alloc_stacks(ImageHeader * header)
                    430: {
                    431:   header->dict_size=dictsize;
                    432:   header->data_stack_size=dsize;
                    433:   header->fp_stack_size=fsize;
                    434:   header->return_stack_size=rsize;
                    435:   header->locals_stack_size=lsize;
                    436: 
                    437:   header->data_stack_base=my_alloc(dsize);
                    438:   header->fp_stack_base=my_alloc(fsize);
                    439:   header->return_stack_base=my_alloc(rsize);
                    440:   header->locals_stack_base=my_alloc(lsize);
                    441: }
                    442: 
1.44      pazsan    443: #warning You can ignore the warnings about clobbered variables in go_forth
1.11      pazsan    444: int go_forth(Address image, int stack, Cell *entries)
                    445: {
1.38      anton     446:   volatile ImageHeader *image_header = (ImageHeader *)image;
1.18      anton     447:   Cell *sp0=(Cell*)(image_header->data_stack_base + dsize);
1.44      pazsan    448:   Cell *rp0=(Cell *)(image_header->return_stack_base + rsize);
1.18      anton     449:   Float *fp0=(Float *)(image_header->fp_stack_base + fsize);
1.44      pazsan    450: #ifdef GFORTH_DEBUGGING
1.38      anton     451:   volatile Cell *orig_rp0=rp0;
1.44      pazsan    452: #endif
1.18      anton     453:   Address lp0=image_header->locals_stack_base + lsize;
                    454:   Xt *ip0=(Xt *)(image_header->boot_entry);
1.13      pazsan    455: #ifdef SYSSIGNALS
1.11      pazsan    456:   int throw_code;
1.13      pazsan    457: #endif
1.11      pazsan    458: 
                    459:   /* ensure that the cached elements (if any) are accessible */
1.41      anton     460:   IF_spTOS(sp0--);
                    461:   IF_fpTOS(fp0--);
1.11      pazsan    462:   
                    463:   for(;stack>0;stack--)
1.18      anton     464:     *--sp0=entries[stack-1];
1.11      pazsan    465: 
1.30      pazsan    466: #ifdef SYSSIGNALS
1.11      pazsan    467:   get_winsize();
                    468:    
                    469:   install_signal_handlers(); /* right place? */
                    470:   
                    471:   if ((throw_code=setjmp(throw_jmp_buf))) {
                    472:     static Cell signal_data_stack[8];
                    473:     static Cell signal_return_stack[8];
                    474:     static Float signal_fp_stack[1];
1.13      pazsan    475: 
1.11      pazsan    476:     signal_data_stack[7]=throw_code;
1.18      anton     477: 
                    478: #ifdef GFORTH_DEBUGGING
1.97      anton     479:     if (debug)
                    480:       fprintf(stderr,"\ncaught signal, throwing exception %d, ip=%p rp=%p\n",
                    481:              throw_code, saved_ip, rp);
1.38      anton     482:     if (rp <= orig_rp0 && rp > (Cell *)(image_header->return_stack_base+5)) {
1.18      anton     483:       /* no rstack overflow or underflow */
                    484:       rp0 = rp;
1.63      anton     485:       *--rp0 = (Cell)saved_ip;
1.18      anton     486:     }
                    487:     else /* I love non-syntactic ifdefs :-) */
1.97      anton     488:       rp0 = signal_return_stack+8;
                    489: #else  /* !defined(GFORTH_DEBUGGING) */
                    490:     if (debug)
                    491:       fprintf(stderr,"\ncaught signal, throwing exception %d\n", throw_code);
                    492:       rp0 = signal_return_stack+8;
                    493: #endif /* !defined(GFORTH_DEBUGGING) */
1.25      anton     494:     /* fprintf(stderr, "rp=$%x\n",rp0);*/
1.11      pazsan    495:     
1.33      anton     496:     return((int)(Cell)engine(image_header->throw_entry, signal_data_stack+7,
1.18      anton     497:                       rp0, signal_fp_stack, 0));
1.11      pazsan    498:   }
1.13      pazsan    499: #endif
1.11      pazsan    500: 
1.33      anton     501:   return((int)(Cell)engine(ip0,sp0,rp0,fp0,lp0));
1.11      pazsan    502: }
                    503: 
1.30      pazsan    504: #ifndef INCLUDE_IMAGE
1.21      anton     505: void print_sizes(Cell sizebyte)
                    506:      /* print size information */
                    507: {
                    508:   static char* endianstring[]= { "   big","little" };
                    509:   
                    510:   fprintf(stderr,"%s endian, cell=%d bytes, char=%d bytes, au=%d bytes\n",
                    511:          endianstring[sizebyte & 1],
                    512:          1 << ((sizebyte >> 1) & 3),
                    513:          1 << ((sizebyte >> 3) & 3),
                    514:          1 << ((sizebyte >> 5) & 3));
                    515: }
                    516: 
1.70      anton     517: #define MAX_IMMARGS 2
                    518: 
1.69      anton     519: #ifndef NO_DYNAMIC
1.47      anton     520: typedef struct {
                    521:   Label start;
1.74      anton     522:   Cell length; /* only includes the jump iff superend is true*/
                    523:   Cell restlength; /* length of the rest (i.e., the jump or (on superend) 0) */
1.70      anton     524:   char superend; /* true if primitive ends superinstruction, i.e.,
1.47      anton     525:                      unconditional branch, execute, etc. */
1.70      anton     526:   Cell nimmargs;
                    527:   struct immarg {
                    528:     Cell offset; /* offset of immarg within prim */
                    529:     char rel;    /* true if immarg is relative */
                    530:   } immargs[MAX_IMMARGS];
1.47      anton     531: } PrimInfo;
                    532: 
                    533: PrimInfo *priminfos;
1.76      anton     534: PrimInfo **decomp_prims;
                    535: 
1.90      anton     536: int compare_priminfo_length(const void *_a, const void *_b)
1.76      anton     537: {
1.90      anton     538:   PrimInfo **a = (PrimInfo **)_a;
                    539:   PrimInfo **b = (PrimInfo **)_b;
1.77      anton     540:   Cell diff = (*a)->length - (*b)->length;
                    541:   if (diff)
                    542:     return diff;
                    543:   else /* break ties by start address; thus the decompiler produces
                    544:           the earliest primitive with the same code (e.g. noop instead
                    545:           of (char) and @ instead of >code-address */
                    546:     return (*b)->start - (*a)->start;
1.76      anton     547: }
                    548: 
1.69      anton     549: #endif /* defined(NO_DYNAMIC) */
1.48      anton     550: Cell npriminfos=0;
1.47      anton     551: 
1.76      anton     552: 
1.47      anton     553: void check_prims(Label symbols1[])
                    554: {
                    555:   int i;
1.90      anton     556: #ifndef NO_DYNAMIC
1.70      anton     557:   Label *symbols2, *symbols3, *ends1;
1.49      anton     558:   static char superend[]={
1.48      anton     559: #include "prim_superend.i"
                    560:   };
1.90      anton     561: #endif
1.47      anton     562: 
1.66      anton     563:   if (debug)
                    564: #ifdef __VERSION__
                    565:     fprintf(stderr, "Compiled with gcc-" __VERSION__ "\n");
                    566: #else
                    567: #define xstr(s) str(s)
                    568: #define str(s) #s
                    569:   fprintf(stderr, "Compiled with gcc-" xstr(__GNUC__) "." xstr(__GNUC_MINOR__) "\n"); 
                    570: #endif
1.47      anton     571:   for (i=DOESJUMP+1; symbols1[i+1]!=0; i++)
                    572:     ;
1.55      anton     573:   npriminfos = i;
1.70      anton     574:   
                    575: #ifndef NO_DYNAMIC
1.66      anton     576:   if (no_dynamic)
                    577:     return;
1.55      anton     578:   symbols2=engine2(0,0,0,0,0);
1.70      anton     579: #if NO_IP
                    580:   symbols3=engine3(0,0,0,0,0);
                    581: #else
                    582:   symbols3=symbols1;
                    583: #endif
                    584:   ends1 = symbols1+i+1-DOESJUMP;
1.47      anton     585:   priminfos = calloc(i,sizeof(PrimInfo));
                    586:   for (i=DOESJUMP+1; symbols1[i+1]!=0; i++) {
1.70      anton     587:     int prim_len = ends1[i]-symbols1[i];
1.47      anton     588:     PrimInfo *pi=&priminfos[i];
1.70      anton     589:     int j=0;
                    590:     char *s1 = (char *)symbols1[i];
                    591:     char *s2 = (char *)symbols2[i];
                    592:     char *s3 = (char *)symbols3[i];
                    593: 
                    594:     pi->start = s1;
                    595:     pi->superend = superend[i-DOESJUMP-1]|no_super;
                    596:     if (pi->superend)
                    597:       pi->length = symbols1[i+1]-symbols1[i];
                    598:     else
                    599:       pi->length = prim_len;
1.74      anton     600:     pi->restlength = symbols1[i+1] - symbols1[i] - pi->length;
1.70      anton     601:     pi->nimmargs = 0;
                    602:     if (debug)
1.98    ! anton     603:       fprintf(stderr, "Prim %3d @ %p %p %p, length=%3ld restlength=%2ld superend=%1d",
        !           604:              i, s1, s2, s3, (long)(pi->length), (long)(pi->restlength), pi->superend);
1.70      anton     605:     assert(prim_len>=0);
1.74      anton     606:     while (j<(pi->length+pi->restlength)) {
1.70      anton     607:       if (s1[j]==s3[j]) {
                    608:        if (s1[j] != s2[j]) {
                    609:          pi->start = NULL; /* not relocatable */
                    610:          if (debug)
                    611:            fprintf(stderr,"\n   non_reloc: engine1!=engine2 offset %3d",j);
1.74      anton     612:          /* assert(j<prim_len); */
1.70      anton     613:          break;
                    614:        }
                    615:        j++;
                    616:       } else {
                    617:        struct immarg *ia=&pi->immargs[pi->nimmargs];
                    618: 
                    619:        pi->nimmargs++;
                    620:        ia->offset=j;
                    621:        if ((~*(Cell *)&(s1[j]))==*(Cell *)&(s3[j])) {
                    622:          ia->rel=0;
                    623:          if (debug)
                    624:            fprintf(stderr,"\n   absolute immarg: offset %3d",j);
                    625:        } else if ((&(s1[j]))+(*(Cell *)&(s1[j]))+4 ==
                    626:                   symbols1[DOESJUMP+1]) {
                    627:          ia->rel=1;
                    628:          if (debug)
                    629:            fprintf(stderr,"\n   relative immarg: offset %3d",j);
                    630:        } else {
                    631:          pi->start = NULL; /* not relocatable */
                    632:          if (debug)
                    633:            fprintf(stderr,"\n   non_reloc: engine1!=engine3 offset %3d",j);
1.74      anton     634:          /* assert(j<prim_len);*/
1.70      anton     635:          break;
                    636:        }
                    637:        j+=4;
1.47      anton     638:       }
                    639:     }
1.70      anton     640:     if (debug)
                    641:       fprintf(stderr,"\n");
                    642:   }
1.76      anton     643:   decomp_prims = calloc(i,sizeof(PrimInfo *));
                    644:   for (i=DOESJUMP+1; i<npriminfos; i++)
                    645:     decomp_prims[i] = &(priminfos[i]);
                    646:   qsort(decomp_prims+DOESJUMP+1, npriminfos-DOESJUMP-1, sizeof(PrimInfo *),
                    647:        compare_priminfo_length);
1.70      anton     648: #endif
                    649: }
                    650: 
1.74      anton     651: void flush_to_here(void)
                    652: {
1.93      anton     653: #ifndef NO_DYNAMIC
1.74      anton     654:   FLUSH_ICACHE(start_flush, code_here-start_flush);
                    655:   start_flush=code_here;
1.93      anton     656: #endif
1.74      anton     657: }
                    658: 
1.93      anton     659: #ifndef NO_DYNAMIC
1.74      anton     660: void append_jump(void)
                    661: {
                    662:   if (last_jump) {
                    663:     PrimInfo *pi = &priminfos[last_jump];
                    664:     
                    665:     memcpy(code_here, pi->start+pi->length, pi->restlength);
                    666:     code_here += pi->restlength;
                    667:     last_jump=0;
                    668:   }
                    669: }
                    670: 
1.75      anton     671: /* Gforth remembers all code blocks in this list.  On forgetting (by
                    672: executing a marker) the code blocks are not freed (because Gforth does
                    673: not remember how they were allocated; hmm, remembering that might be
                    674: easier and cleaner).  Instead, code_here etc. are reset to the old
                    675: value, and the "forgotten" code blocks are reused when they are
                    676: needed. */
                    677: 
                    678: struct code_block_list {
                    679:   struct code_block_list *next;
                    680:   Address block;
                    681:   Cell size;
                    682: } *code_block_list=NULL, **next_code_blockp=&code_block_list;
                    683: 
1.74      anton     684: Address append_prim(Cell p)
                    685: {
                    686:   PrimInfo *pi = &priminfos[p];
                    687:   Address old_code_here = code_here;
                    688: 
                    689:   if (code_area+code_area_size < code_here+pi->length+pi->restlength) {
1.75      anton     690:     struct code_block_list *p;
1.74      anton     691:     append_jump();
1.93      anton     692:     flush_to_here();
1.75      anton     693:     if (*next_code_blockp == NULL) {
                    694:       code_here = start_flush = code_area = my_alloc(code_area_size);
                    695:       p = (struct code_block_list *)malloc(sizeof(struct code_block_list));
                    696:       *next_code_blockp = p;
                    697:       p->next = NULL;
                    698:       p->block = code_here;
                    699:       p->size = code_area_size;
                    700:     } else {
                    701:       p = *next_code_blockp;
                    702:       code_here = start_flush = code_area = p->block;
                    703:     }
1.74      anton     704:     old_code_here = code_here;
1.75      anton     705:     next_code_blockp = &(p->next);
1.74      anton     706:   }
                    707:   memcpy(code_here, pi->start, pi->length);
                    708:   code_here += pi->length;
                    709:   return old_code_here;
                    710: }
                    711: #endif
1.75      anton     712: 
                    713: int forget_dyncode(Address code)
                    714: {
                    715: #ifdef NO_DYNAMIC
                    716:   return -1;
                    717: #else
                    718:   struct code_block_list *p, **pp;
                    719: 
                    720:   for (pp=&code_block_list, p=*pp; p!=NULL; pp=&(p->next), p=*pp) {
                    721:     if (code >= p->block && code < p->block+p->size) {
                    722:       next_code_blockp = &(p->next);
                    723:       code_here = start_flush = code;
                    724:       code_area = p->block;
                    725:       last_jump = 0;
                    726:       return -1;
                    727:     }
                    728:   }
1.78      anton     729:   return -no_dynamic;
1.75      anton     730: #endif /* !defined(NO_DYNAMIC) */
                    731: }
                    732: 
1.90      anton     733: Label decompile_code(Label _code)
1.75      anton     734: {
1.76      anton     735: #ifdef NO_DYNAMIC
1.90      anton     736:   return _code;
1.76      anton     737: #else /* !defined(NO_DYNAMIC) */
                    738:   Cell i;
1.77      anton     739:   struct code_block_list *p;
1.90      anton     740:   Address code=_code;
1.76      anton     741: 
1.77      anton     742:   /* first, check if we are in code at all */
                    743:   for (p = code_block_list;; p = p->next) {
                    744:     if (p == NULL)
                    745:       return code;
                    746:     if (code >= p->block && code < p->block+p->size)
                    747:       break;
                    748:   }
1.76      anton     749:   /* reverse order because NOOP might match other prims */
                    750:   for (i=npriminfos-1; i>DOESJUMP; i--) {
                    751:     PrimInfo *pi=decomp_prims[i];
                    752:     if (pi->start==code || (pi->start && memcmp(code,pi->start,pi->length)==0))
                    753:       return pi->start;
                    754:   }
                    755:   return code;
                    756: #endif /* !defined(NO_DYNAMIC) */
1.75      anton     757: }
1.74      anton     758: 
1.70      anton     759: #ifdef NO_IP
                    760: int nbranchinfos=0;
                    761: 
                    762: struct branchinfo {
                    763:   Label *targetptr; /* *(bi->targetptr) is the target */
                    764:   Cell *addressptr; /* store the target here */
                    765: } branchinfos[100000];
                    766: 
                    767: int ndoesexecinfos=0;
                    768: struct doesexecinfo {
                    769:   int branchinfo; /* fix the targetptr of branchinfos[...->branchinfo] */
                    770:   Cell *xt; /* cfa of word whose does-code needs calling */
                    771: } doesexecinfos[10000];
                    772: 
1.73      anton     773: /* definitions of N_execute etc. */
                    774: #include "prim_num.i"
1.70      anton     775: 
                    776: void set_rel_target(Cell *source, Label target)
                    777: {
                    778:   *source = ((Cell)target)-(((Cell)source)+4);
                    779: }
                    780: 
                    781: void register_branchinfo(Label source, Cell targetptr)
                    782: {
                    783:   struct branchinfo *bi = &(branchinfos[nbranchinfos]);
                    784:   bi->targetptr = (Label *)targetptr;
                    785:   bi->addressptr = (Cell *)source;
                    786:   nbranchinfos++;
                    787: }
                    788: 
                    789: Cell *compile_prim1arg(Cell p)
                    790: {
                    791:   int l = priminfos[p].length;
                    792:   Address old_code_here=code_here;
                    793: 
1.74      anton     794:   assert(vm_prims[p]==priminfos[p].start);
                    795:   append_prim(p);
1.70      anton     796:   return (Cell*)(old_code_here+priminfos[p].immargs[0].offset);
                    797: }
                    798: 
                    799: Cell *compile_call2(Cell targetptr)
                    800: {
                    801:   Cell *next_code_target;
1.73      anton     802:   PrimInfo *pi = &priminfos[N_call2];
1.74      anton     803:   Address old_code_here = append_prim(N_call2);
1.70      anton     804: 
1.74      anton     805:   next_code_target = (Cell *)(old_code_here + pi->immargs[0].offset);
                    806:   register_branchinfo(old_code_here + pi->immargs[1].offset, targetptr);
1.70      anton     807:   return next_code_target;
                    808: }
                    809: #endif
                    810: 
                    811: void finish_code(void)
                    812: {
                    813: #ifdef NO_IP
                    814:   Cell i;
                    815: 
                    816:   compile_prim1(NULL);
                    817:   for (i=0; i<ndoesexecinfos; i++) {
                    818:     struct doesexecinfo *dei = &doesexecinfos[i];
                    819:     branchinfos[dei->branchinfo].targetptr = DOES_CODE1((dei->xt));
                    820:   }
                    821:   ndoesexecinfos = 0;
                    822:   for (i=0; i<nbranchinfos; i++) {
                    823:     struct branchinfo *bi=&branchinfos[i];
                    824:     set_rel_target(bi->addressptr, *(bi->targetptr));
                    825:   }
                    826:   nbranchinfos = 0;
1.48      anton     827: #endif
1.93      anton     828:   flush_to_here();
1.48      anton     829: }
                    830: 
1.70      anton     831: void compile_prim1(Cell *start)
1.48      anton     832: {
1.61      anton     833: #if defined(DOUBLY_INDIRECT)
1.70      anton     834:   Label prim=(Label)*start;
1.54      anton     835:   if (prim<((Label)(xts+DOESJUMP)) || prim>((Label)(xts+npriminfos))) {
                    836:     fprintf(stderr,"compile_prim encountered xt %p\n", prim);
1.70      anton     837:     *start=(Cell)prim;
                    838:     return;
                    839:   } else {
1.90      anton     840:     *start = (Cell)(prim-((Label)xts)+((Label)vm_prims));
1.70      anton     841:     return;
                    842:   }
                    843: #elif defined(NO_IP)
                    844:   static Cell *last_start=NULL;
                    845:   static Xt last_prim=NULL;
                    846:   /* delay work by one call in order to get relocated immargs */
                    847: 
                    848:   if (last_start) {
                    849:     unsigned i = last_prim-vm_prims;
                    850:     PrimInfo *pi=&priminfos[i];
                    851:     Cell *next_code_target=NULL;
                    852: 
                    853:     assert(i<npriminfos);
1.73      anton     854:     if (i==N_execute||i==N_perform||i==N_lit_perform) {
                    855:       next_code_target = compile_prim1arg(N_set_next_code);
1.70      anton     856:     }
1.73      anton     857:     if (i==N_call) {
1.70      anton     858:       next_code_target = compile_call2(last_start[1]);
1.73      anton     859:     } else if (i==N_does_exec) {
1.70      anton     860:       struct doesexecinfo *dei = &doesexecinfos[ndoesexecinfos++];
1.73      anton     861:       *compile_prim1arg(N_lit) = (Cell)PFA(last_start[1]);
1.70      anton     862:       /* we cannot determine the callee now (last_start[1] may be a
                    863:          forward reference), so just register an arbitrary target, and
                    864:          register in dei that we need to fix this before resolving
                    865:          branches */
                    866:       dei->branchinfo = nbranchinfos;
                    867:       dei->xt = (Cell *)(last_start[1]);
                    868:       next_code_target = compile_call2(NULL);
                    869:     } else if (pi->start == NULL) { /* non-reloc */
1.73      anton     870:       next_code_target = compile_prim1arg(N_set_next_code);
                    871:       set_rel_target(compile_prim1arg(N_abranch),*(Xt)last_prim);
1.70      anton     872:     } else {
                    873:       unsigned j;
1.74      anton     874:       Address old_code_here = append_prim(i);
1.70      anton     875: 
                    876:       for (j=0; j<pi->nimmargs; j++) {
                    877:        struct immarg *ia = &(pi->immargs[j]);
                    878:        Cell argval = last_start[pi->nimmargs - j]; /* !! specific to prims */
                    879:        if (ia->rel) { /* !! assumption: relative refs are branches */
1.74      anton     880:          register_branchinfo(old_code_here + ia->offset, argval);
1.70      anton     881:        } else /* plain argument */
1.74      anton     882:          *(Cell *)(old_code_here + ia->offset) = argval;
1.70      anton     883:       }
                    884:     }
                    885:     if (next_code_target!=NULL)
                    886:       *next_code_target = (Cell)code_here;
                    887:   }
                    888:   if (start) {
                    889:     last_prim = (Xt)*start;
                    890:     *start = (Cell)code_here;
                    891:   }
                    892:   last_start = start;
                    893:   return;
                    894: #elif !defined(NO_DYNAMIC)
                    895:   Label prim=(Label)*start;
1.58      anton     896:   unsigned i;
1.74      anton     897:   Address old_code_here;
1.48      anton     898: 
1.58      anton     899:   i = ((Xt)prim)-vm_prims;
1.56      anton     900:   prim = *(Xt)prim;
1.70      anton     901:   if (no_dynamic) {
                    902:     *start = (Cell)prim;
                    903:     return;
                    904:   }
1.58      anton     905:   if (i>=npriminfos || priminfos[i].start == 0) { /* not a relocatable prim */
1.74      anton     906:     append_jump();
1.70      anton     907:     *start = (Cell)prim;
                    908:     return;
1.47      anton     909:   }
1.58      anton     910:   assert(priminfos[i].start = prim); 
1.50      anton     911: #ifdef ALIGN_CODE
1.87      anton     912:   /*  ALIGN_CODE;*/
1.50      anton     913: #endif
1.74      anton     914:   assert(prim==priminfos[i].start);
                    915:   old_code_here = append_prim(i);
                    916:   last_jump = (priminfos[i].superend) ? 0 : i;
1.70      anton     917:   *start = (Cell)old_code_here;
                    918:   return;
1.61      anton     919: #else /* !defined(DOUBLY_INDIRECT), no code replication */
1.70      anton     920:   Label prim=(Label)*start;
1.61      anton     921: #if !defined(INDIRECT_THREADED)
1.56      anton     922:   prim = *(Xt)prim;
1.61      anton     923: #endif
1.70      anton     924:   *start = (Cell)prim;
                    925:   return;
1.54      anton     926: #endif /* !defined(DOUBLY_INDIRECT) */
1.70      anton     927: }
                    928: 
                    929: Label compile_prim(Label prim)
                    930: {
                    931:   Cell x=(Cell)prim;
1.80      anton     932:   assert(0);
1.70      anton     933:   compile_prim1(&x);
                    934:   return (Label)x;
1.47      anton     935: }
                    936: 
1.69      anton     937: #if defined(PRINT_SUPER_LENGTHS) && !defined(NO_DYNAMIC)
1.59      anton     938: Cell prim_length(Cell prim)
                    939: {
                    940:   return priminfos[prim+DOESJUMP+1].length;
                    941: }
                    942: #endif
                    943: 
1.1       anton     944: Address loader(FILE *imagefile, char* filename)
                    945: /* returns the address of the image proper (after the preamble) */
                    946: {
                    947:   ImageHeader header;
                    948:   Address image;
                    949:   Address imp; /* image+preamble */
1.17      anton     950:   Char magic[8];
                    951:   char magic7; /* size byte of magic number */
1.1       anton     952:   Cell preamblesize=0;
1.6       pazsan    953:   Cell data_offset = offset_image ? 56*sizeof(Cell) : 0;
1.1       anton     954:   UCell check_sum;
1.15      pazsan    955:   Cell ausize = ((RELINFOBITS ==  8) ? 0 :
                    956:                 (RELINFOBITS == 16) ? 1 :
                    957:                 (RELINFOBITS == 32) ? 2 : 3);
                    958:   Cell charsize = ((sizeof(Char) == 1) ? 0 :
                    959:                   (sizeof(Char) == 2) ? 1 :
                    960:                   (sizeof(Char) == 4) ? 2 : 3) + ausize;
                    961:   Cell cellsize = ((sizeof(Cell) == 1) ? 0 :
                    962:                   (sizeof(Cell) == 2) ? 1 :
                    963:                   (sizeof(Cell) == 4) ? 2 : 3) + ausize;
1.21      anton     964:   Cell sizebyte = (ausize << 5) + (charsize << 3) + (cellsize << 1) +
                    965: #ifdef WORDS_BIGENDIAN
                    966:        0
                    967: #else
                    968:        1
                    969: #endif
                    970:     ;
1.1       anton     971: 
1.43      anton     972:   vm_prims = engine(0,0,0,0,0);
1.47      anton     973:   check_prims(vm_prims);
1.1       anton     974: #ifndef DOUBLY_INDIRECT
1.59      anton     975: #ifdef PRINT_SUPER_LENGTHS
                    976:   print_super_lengths();
                    977: #endif
1.43      anton     978:   check_sum = checksum(vm_prims);
1.1       anton     979: #else /* defined(DOUBLY_INDIRECT) */
1.43      anton     980:   check_sum = (UCell)vm_prims;
1.1       anton     981: #endif /* defined(DOUBLY_INDIRECT) */
1.10      pazsan    982:   
                    983:   do {
                    984:     if(fread(magic,sizeof(Char),8,imagefile) < 8) {
1.84      anton     985:       fprintf(stderr,"%s: image %s doesn't seem to be a Gforth (>=0.6) image.\n",
1.10      pazsan    986:              progname, filename);
                    987:       exit(1);
1.1       anton     988:     }
1.10      pazsan    989:     preamblesize+=8;
1.84      anton     990:   } while(memcmp(magic,"Gforth3",7));
1.17      anton     991:   magic7 = magic[7];
1.1       anton     992:   if (debug) {
1.17      anton     993:     magic[7]='\0';
1.21      anton     994:     fprintf(stderr,"Magic found: %s ", magic);
                    995:     print_sizes(magic7);
1.1       anton     996:   }
                    997: 
1.21      anton     998:   if (magic7 != sizebyte)
                    999:     {
                   1000:       fprintf(stderr,"This image is:         ");
                   1001:       print_sizes(magic7);
                   1002:       fprintf(stderr,"whereas the machine is ");
                   1003:       print_sizes(sizebyte);
1.1       anton    1004:       exit(-2);
                   1005:     };
                   1006: 
                   1007:   fread((void *)&header,sizeof(ImageHeader),1,imagefile);
1.10      pazsan   1008: 
                   1009:   set_stack_sizes(&header);
1.1       anton    1010:   
                   1011: #if HAVE_GETPAGESIZE
                   1012:   pagesize=getpagesize(); /* Linux/GNU libc offers this */
                   1013: #elif HAVE_SYSCONF && defined(_SC_PAGESIZE)
                   1014:   pagesize=sysconf(_SC_PAGESIZE); /* POSIX.4 */
                   1015: #elif PAGESIZE
                   1016:   pagesize=PAGESIZE; /* in limits.h according to Gallmeister's POSIX.4 book */
                   1017: #endif
                   1018:   if (debug)
1.5       jwilke   1019:     fprintf(stderr,"pagesize=%ld\n",(unsigned long) pagesize);
1.1       anton    1020: 
1.34      anton    1021:   image = dict_alloc_read(imagefile, preamblesize+header.image_size,
                   1022:                          preamblesize+dictsize, data_offset);
1.33      anton    1023:   imp=image+preamblesize;
1.57      anton    1024:   alloc_stacks((ImageHeader *)imp);
1.1       anton    1025:   if (clear_dictionary)
1.33      anton    1026:     memset(imp+header.image_size, 0, dictsize-header.image_size);
1.90      anton    1027:   if(header.base==0 || header.base  == (Address)0x100) {
1.1       anton    1028:     Cell reloc_size=((header.image_size-1)/sizeof(Cell))/8+1;
                   1029:     char reloc_bits[reloc_size];
1.33      anton    1030:     fseek(imagefile, preamblesize+header.image_size, SEEK_SET);
1.10      pazsan   1031:     fread(reloc_bits, 1, reloc_size, imagefile);
1.90      anton    1032:     relocate((Cell *)imp, reloc_bits, header.image_size, (Cell)header.base, vm_prims);
1.1       anton    1033: #if 0
                   1034:     { /* let's see what the relocator did */
                   1035:       FILE *snapshot=fopen("snapshot.fi","wb");
                   1036:       fwrite(image,1,imagesize,snapshot);
                   1037:       fclose(snapshot);
                   1038:     }
                   1039: #endif
1.46      jwilke   1040:   }
                   1041:   else if(header.base!=imp) {
                   1042:     fprintf(stderr,"%s: Cannot load nonrelocatable image (compiled for address $%lx) at address $%lx\n",
                   1043:            progname, (unsigned long)header.base, (unsigned long)imp);
                   1044:     exit(1);
1.1       anton    1045:   }
                   1046:   if (header.checksum==0)
                   1047:     ((ImageHeader *)imp)->checksum=check_sum;
                   1048:   else if (header.checksum != check_sum) {
                   1049:     fprintf(stderr,"%s: Checksum of image ($%lx) does not match the executable ($%lx)\n",
                   1050:            progname, (unsigned long)(header.checksum),(unsigned long)check_sum);
                   1051:     exit(1);
                   1052:   }
1.53      anton    1053: #ifdef DOUBLY_INDIRECT
                   1054:   ((ImageHeader *)imp)->xt_base = xts;
                   1055: #endif
1.1       anton    1056:   fclose(imagefile);
                   1057: 
1.56      anton    1058:   /* unnecessary, except maybe for CODE words */
                   1059:   /* FLUSH_ICACHE(imp, header.image_size);*/
1.1       anton    1060: 
                   1061:   return imp;
                   1062: }
                   1063: 
1.72      anton    1064: /* pointer to last '/' or '\' in file, 0 if there is none. */
                   1065: char *onlypath(char *filename)
1.10      pazsan   1066: {
1.72      anton    1067:   return strrchr(filename, DIRSEP);
1.1       anton    1068: }
                   1069: 
                   1070: FILE *openimage(char *fullfilename)
1.10      pazsan   1071: {
                   1072:   FILE *image_file;
1.28      anton    1073:   char * expfilename = tilde_cstr(fullfilename, strlen(fullfilename), 1);
1.10      pazsan   1074: 
1.28      anton    1075:   image_file=fopen(expfilename,"rb");
1.1       anton    1076:   if (image_file!=NULL && debug)
1.28      anton    1077:     fprintf(stderr, "Opened image file: %s\n", expfilename);
1.10      pazsan   1078:   return image_file;
1.1       anton    1079: }
                   1080: 
1.28      anton    1081: /* try to open image file concat(path[0:len],imagename) */
1.1       anton    1082: FILE *checkimage(char *path, int len, char *imagename)
1.10      pazsan   1083: {
                   1084:   int dirlen=len;
1.1       anton    1085:   char fullfilename[dirlen+strlen(imagename)+2];
1.10      pazsan   1086: 
1.1       anton    1087:   memcpy(fullfilename, path, dirlen);
1.71      pazsan   1088:   if (fullfilename[dirlen-1]!=DIRSEP)
                   1089:     fullfilename[dirlen++]=DIRSEP;
1.1       anton    1090:   strcpy(fullfilename+dirlen,imagename);
1.10      pazsan   1091:   return openimage(fullfilename);
1.1       anton    1092: }
                   1093: 
1.10      pazsan   1094: FILE * open_image_file(char * imagename, char * path)
1.1       anton    1095: {
1.10      pazsan   1096:   FILE * image_file=NULL;
1.28      anton    1097:   char *origpath=path;
1.10      pazsan   1098:   
1.71      pazsan   1099:   if(strchr(imagename, DIRSEP)==NULL) {
1.10      pazsan   1100:     /* first check the directory where the exe file is in !! 01may97jaw */
                   1101:     if (onlypath(progname))
1.72      anton    1102:       image_file=checkimage(progname, onlypath(progname)-progname, imagename);
1.10      pazsan   1103:     if (!image_file)
                   1104:       do {
                   1105:        char *pend=strchr(path, PATHSEP);
                   1106:        if (pend==NULL)
                   1107:          pend=path+strlen(path);
                   1108:        if (strlen(path)==0) break;
                   1109:        image_file=checkimage(path, pend-path, imagename);
                   1110:        path=pend+(*pend==PATHSEP);
                   1111:       } while (image_file==NULL);
                   1112:   } else {
                   1113:     image_file=openimage(imagename);
                   1114:   }
1.1       anton    1115: 
1.10      pazsan   1116:   if (!image_file) {
                   1117:     fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n",
1.28      anton    1118:            progname, imagename, origpath);
1.10      pazsan   1119:     exit(1);
1.7       anton    1120:   }
                   1121: 
1.10      pazsan   1122:   return image_file;
                   1123: }
1.11      pazsan   1124: #endif
                   1125: 
                   1126: #ifdef HAS_OS
                   1127: UCell convsize(char *s, UCell elemsize)
                   1128: /* converts s of the format [0-9]+[bekMGT]? (e.g. 25k) into the number
                   1129:    of bytes.  the letter at the end indicates the unit, where e stands
                   1130:    for the element size. default is e */
                   1131: {
                   1132:   char *endp;
                   1133:   UCell n,m;
                   1134: 
                   1135:   m = elemsize;
                   1136:   n = strtoul(s,&endp,0);
                   1137:   if (endp!=NULL) {
                   1138:     if (strcmp(endp,"b")==0)
                   1139:       m=1;
                   1140:     else if (strcmp(endp,"k")==0)
                   1141:       m=1024;
                   1142:     else if (strcmp(endp,"M")==0)
                   1143:       m=1024*1024;
                   1144:     else if (strcmp(endp,"G")==0)
                   1145:       m=1024*1024*1024;
                   1146:     else if (strcmp(endp,"T")==0) {
                   1147: #if (SIZEOF_CHAR_P > 4)
1.24      anton    1148:       m=1024L*1024*1024*1024;
1.11      pazsan   1149: #else
                   1150:       fprintf(stderr,"%s: size specification \"%s\" too large for this machine\n", progname, endp);
                   1151:       exit(1);
                   1152: #endif
                   1153:     } else if (strcmp(endp,"e")!=0 && strcmp(endp,"")!=0) {
                   1154:       fprintf(stderr,"%s: cannot grok size specification %s: invalid unit \"%s\"\n", progname, s, endp);
                   1155:       exit(1);
                   1156:     }
                   1157:   }
                   1158:   return n*m;
                   1159: }
1.10      pazsan   1160: 
                   1161: void gforth_args(int argc, char ** argv, char ** path, char ** imagename)
                   1162: {
                   1163:   int c;
                   1164: 
1.1       anton    1165:   opterr=0;
                   1166:   while (1) {
                   1167:     int option_index=0;
                   1168:     static struct option opts[] = {
1.29      anton    1169:       {"appl-image", required_argument, NULL, 'a'},
1.1       anton    1170:       {"image-file", required_argument, NULL, 'i'},
                   1171:       {"dictionary-size", required_argument, NULL, 'm'},
                   1172:       {"data-stack-size", required_argument, NULL, 'd'},
                   1173:       {"return-stack-size", required_argument, NULL, 'r'},
                   1174:       {"fp-stack-size", required_argument, NULL, 'f'},
                   1175:       {"locals-stack-size", required_argument, NULL, 'l'},
                   1176:       {"path", required_argument, NULL, 'p'},
                   1177:       {"version", no_argument, NULL, 'v'},
                   1178:       {"help", no_argument, NULL, 'h'},
                   1179:       /* put something != 0 into offset_image */
                   1180:       {"offset-image", no_argument, &offset_image, 1},
                   1181:       {"no-offset-im", no_argument, &offset_image, 0},
                   1182:       {"clear-dictionary", no_argument, &clear_dictionary, 1},
1.4       anton    1183:       {"die-on-signal", no_argument, &die_on_signal, 1},
1.1       anton    1184:       {"debug", no_argument, &debug, 1},
1.60      anton    1185:       {"no-super", no_argument, &no_super, 1},
                   1186:       {"no-dynamic", no_argument, &no_dynamic, 1},
1.66      anton    1187:       {"dynamic", no_argument, &no_dynamic, 0},
1.1       anton    1188:       {0,0,0,0}
                   1189:       /* no-init-file, no-rc? */
                   1190:     };
                   1191:     
1.36      pazsan   1192:     c = getopt_long(argc, argv, "+i:m:d:r:f:l:p:vhoncsx", opts, &option_index);
1.1       anton    1193:     
                   1194:     switch (c) {
1.29      anton    1195:     case EOF: return;
                   1196:     case '?': optind--; return;
                   1197:     case 'a': *imagename = optarg; return;
1.10      pazsan   1198:     case 'i': *imagename = optarg; break;
1.1       anton    1199:     case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
                   1200:     case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
                   1201:     case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
                   1202:     case 'f': fsize = convsize(optarg,sizeof(Float)); break;
                   1203:     case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
1.10      pazsan   1204:     case 'p': *path = optarg; break;
1.36      pazsan   1205:     case 'o': offset_image = 1; break;
                   1206:     case 'n': offset_image = 0; break;
                   1207:     case 'c': clear_dictionary = 1; break;
                   1208:     case 's': die_on_signal = 1; break;
                   1209:     case 'x': debug = 1; break;
1.83      anton    1210:     case 'v': fputs(PACKAGE_STRING"\n", stderr); exit(0);
1.1       anton    1211:     case 'h': 
1.29      anton    1212:       fprintf(stderr, "Usage: %s [engine options] ['--'] [image arguments]\n\
1.1       anton    1213: Engine Options:\n\
1.29      anton    1214:   --appl-image FILE                equivalent to '--image-file=FILE --'\n\
1.10      pazsan   1215:   --clear-dictionary               Initialize the dictionary with 0 bytes\n\
                   1216:   -d SIZE, --data-stack-size=SIZE   Specify data stack size\n\
                   1217:   --debug                          Print debugging information during startup\n\
                   1218:   --die-on-signal                  exit instead of CATCHing some signals\n\
1.66      anton    1219:   --dynamic                        use dynamic native code\n\
1.10      pazsan   1220:   -f SIZE, --fp-stack-size=SIZE            Specify floating point stack size\n\
                   1221:   -h, --help                       Print this message and exit\n\
                   1222:   -i FILE, --image-file=FILE       Use image FILE instead of `gforth.fi'\n\
                   1223:   -l SIZE, --locals-stack-size=SIZE Specify locals stack size\n\
                   1224:   -m SIZE, --dictionary-size=SIZE   Specify Forth dictionary size\n\
1.60      anton    1225:   --no-dynamic                     Use only statically compiled primitives\n\
1.10      pazsan   1226:   --no-offset-im                   Load image at normal position\n\
1.60      anton    1227:   --no-super                        No dynamically formed superinstructions\n\
1.10      pazsan   1228:   --offset-image                   Load image at a different position\n\
                   1229:   -p PATH, --path=PATH             Search path for finding image and sources\n\
                   1230:   -r SIZE, --return-stack-size=SIZE Specify return stack size\n\
1.66      anton    1231:   -v, --version                            Print engine version and exit\n\
1.1       anton    1232: SIZE arguments consist of an integer followed by a unit. The unit can be\n\
1.10      pazsan   1233:   `b' (byte), `e' (element; default), `k' (KB), `M' (MB), `G' (GB) or `T' (TB).\n",
                   1234:              argv[0]);
                   1235:       optind--;
                   1236:       return;
1.1       anton    1237:     }
                   1238:   }
1.10      pazsan   1239: }
1.11      pazsan   1240: #endif
1.10      pazsan   1241: 
                   1242: #ifdef INCLUDE_IMAGE
                   1243: extern Cell image[];
                   1244: extern const char reloc_bits[];
                   1245: #endif
1.67      pazsan   1246: 
1.10      pazsan   1247: int main(int argc, char **argv, char **env)
                   1248: {
1.30      pazsan   1249: #ifdef HAS_OS
1.10      pazsan   1250:   char *path = getenv("GFORTHPATH") ? : DEFAULTPATH;
1.30      pazsan   1251: #else
                   1252:   char *path = DEFAULTPATH;
                   1253: #endif
1.13      pazsan   1254: #ifndef INCLUDE_IMAGE
1.10      pazsan   1255:   char *imagename="gforth.fi";
                   1256:   FILE *image_file;
                   1257:   Address image;
                   1258: #endif
                   1259:   int retvalue;
                   1260:          
1.56      anton    1261: #if defined(i386) && defined(ALIGNMENT_CHECK)
1.10      pazsan   1262:   /* turn on alignment checks on the 486.
                   1263:    * on the 386 this should have no effect. */
                   1264:   __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
                   1265:   /* this is unusable with Linux' libc.4.6.27, because this library is
                   1266:      not alignment-clean; we would have to replace some library
                   1267:      functions (e.g., memcpy) to make it work. Also GCC doesn't try to keep
                   1268:      the stack FP-aligned. */
                   1269: #endif
                   1270: 
                   1271:   /* buffering of the user output device */
1.11      pazsan   1272: #ifdef _IONBF
1.10      pazsan   1273:   if (isatty(fileno(stdout))) {
                   1274:     fflush(stdout);
                   1275:     setvbuf(stdout,NULL,_IONBF,0);
1.1       anton    1276:   }
1.11      pazsan   1277: #endif
1.1       anton    1278: 
1.10      pazsan   1279:   progname = argv[0];
                   1280: 
1.11      pazsan   1281: #ifdef HAS_OS
1.10      pazsan   1282:   gforth_args(argc, argv, &path, &imagename);
1.11      pazsan   1283: #endif
1.10      pazsan   1284: 
                   1285: #ifdef INCLUDE_IMAGE
                   1286:   set_stack_sizes((ImageHeader *)image);
1.22      pazsan   1287:   if(((ImageHeader *)image)->base != image)
                   1288:     relocate(image, reloc_bits, ((ImageHeader *)image)->image_size,
                   1289:             (Label*)engine(0, 0, 0, 0, 0));
1.10      pazsan   1290:   alloc_stacks((ImageHeader *)image);
                   1291: #else
                   1292:   image_file = open_image_file(imagename, path);
                   1293:   image = loader(image_file, imagename);
                   1294: #endif
1.24      anton    1295:   gforth_header=(ImageHeader *)image; /* used in SIGSEGV handler */
1.1       anton    1296: 
                   1297:   {
1.10      pazsan   1298:     char path2[strlen(path)+1];
1.1       anton    1299:     char *p1, *p2;
                   1300:     Cell environ[]= {
                   1301:       (Cell)argc-(optind-1),
                   1302:       (Cell)(argv+(optind-1)),
1.10      pazsan   1303:       (Cell)strlen(path),
1.1       anton    1304:       (Cell)path2};
                   1305:     argv[optind-1] = progname;
                   1306:     /*
                   1307:        for (i=0; i<environ[0]; i++)
                   1308:        printf("%s\n", ((char **)(environ[1]))[i]);
                   1309:        */
                   1310:     /* make path OS-independent by replacing path separators with NUL */
1.10      pazsan   1311:     for (p1=path, p2=path2; *p1!='\0'; p1++, p2++)
1.1       anton    1312:       if (*p1==PATHSEP)
                   1313:        *p2 = '\0';
                   1314:       else
                   1315:        *p2 = *p1;
                   1316:     *p2='\0';
1.10      pazsan   1317:     retvalue = go_forth(image, 4, environ);
1.42      anton    1318: #ifdef VM_PROFILING
                   1319:     vm_print_profile(stderr);
                   1320: #endif
1.1       anton    1321:     deprep_terminal();
                   1322:   }
1.13      pazsan   1323:   return retvalue;
1.1       anton    1324: }

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