Annotation of gforth/engine/engine.c, revision 1.58

1.1       anton       1: /* Gforth virtual machine (aka inner interpreter)
                      2: 
1.57      anton       3:   Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc.
1.1       anton       4: 
                      5:   This file is part of Gforth.
                      6: 
                      7:   Gforth is free software; you can redistribute it and/or
                      8:   modify it under the terms of the GNU General Public License
                      9:   as published by the Free Software Foundation; either version 2
                     10:   of the License, or (at your option) any later version.
                     11: 
                     12:   This program is distributed in the hope that it will be useful,
                     13:   but WITHOUT ANY WARRANTY; without even the implied warranty of
                     14:   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     15:   GNU General Public License for more details.
                     16: 
                     17:   You should have received a copy of the GNU General Public License
                     18:   along with this program; if not, write to the Free Software
1.23      anton      19:   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
1.1       anton      20: */
                     21: 
                     22: #include "config.h"
1.31      pazsan     23: #include "forth.h"
1.1       anton      24: #include <ctype.h>
                     25: #include <stdio.h>
                     26: #include <string.h>
                     27: #include <math.h>
1.4       pazsan     28: #include <assert.h>
                     29: #include <stdlib.h>
                     30: #include <errno.h>
                     31: #include "io.h"
                     32: #include "threaded.h"
                     33: #ifndef STANDALONE
1.1       anton      34: #include <sys/types.h>
                     35: #include <sys/stat.h>
                     36: #include <fcntl.h>
                     37: #include <time.h>
                     38: #include <sys/time.h>
                     39: #include <unistd.h>
                     40: #include <pwd.h>
1.17      pazsan     41: #include <dirent.h>
1.21      anton      42: #include <sys/resource.h>
1.19      anton      43: #ifdef HAVE_FNMATCH_H
1.18      anton      44: #include <fnmatch.h>
1.19      anton      45: #else
                     46: #include "fnmatch.h"
                     47: #endif
1.4       pazsan     48: #else
                     49: #include "systypes.h"
                     50: #endif
1.1       anton      51: 
                     52: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN) /* what else? */
                     53: #include <dlfcn.h>
                     54: #endif
1.8       pazsan     55: #if defined(_WIN32)
                     56: #include <windows.h>
                     57: #endif
1.1       anton      58: #ifdef hpux
                     59: #include <dl.h>
                     60: #endif
                     61: 
                     62: #ifndef SEEK_SET
                     63: /* should be defined in stdio.h, but some systems don't have it */
                     64: #define SEEK_SET 0
                     65: #endif
                     66: 
1.53      anton      67: #ifndef HAVE_FSEEKO
                     68: #define fseeko fseek
                     69: #endif
                     70: 
                     71: #ifndef HAVE_FTELLO
                     72: #define ftello ftell
                     73: #endif
                     74: 
1.4       pazsan     75: struct F83Name {
                     76:   struct F83Name *next;  /* the link field for old hands */
                     77:   char         countetc;
                     78:   char         name[0];
                     79: };
1.1       anton      80: 
                     81: #define F83NAME_COUNT(np)      ((np)->countetc & 0x1f)
                     82: 
                     83: #define NULLC '\0'
                     84: 
1.14      pazsan     85: #ifdef MEMCMP_AS_SUBROUTINE
                     86: extern int gforth_memcmp(const char * s1, const char * s2, size_t n);
1.15      anton      87: #define memcmp(s1,s2,n) gforth_memcmp(s1,s2,n)
1.14      pazsan     88: #endif
                     89: 
1.1       anton      90: #define NEWLINE        '\n'
                     91: 
1.26      anton      92: /* conversion on fetch */
                     93: 
1.41      anton      94: #define vm_Cell2f(_cell,_x)            ((_x)=(Bool)(_cell))
                     95: #define vm_Cell2c(_cell,_x)            ((_x)=(Char)(_cell))
                     96: #define vm_Cell2n(_cell,_x)            ((_x)=(Cell)(_cell))
                     97: #define vm_Cell2w(_cell,_x)            ((_x)=(Cell)(_cell))
                     98: #define vm_Cell2u(_cell,_x)            ((_x)=(UCell)(_cell))
                     99: #define vm_Cell2a_(_cell,_x)           ((_x)=(Cell *)(_cell))
                    100: #define vm_Cell2c_(_cell,_x)           ((_x)=(Char *)(_cell))
                    101: #define vm_Cell2f_(_cell,_x)           ((_x)=(Float *)(_cell))
                    102: #define vm_Cell2df_(_cell,_x)          ((_x)=(DFloat *)(_cell))
                    103: #define vm_Cell2sf_(_cell,_x)          ((_x)=(SFloat *)(_cell))
                    104: #define vm_Cell2xt(_cell,_x)           ((_x)=(Xt)(_cell))
                    105: #define vm_Cell2f83name(_cell,_x)      ((_x)=(struct F83Name *)(_cell))
                    106: #define vm_Cell2longname(_cell,_x)     ((_x)=(struct Longname *)(_cell))
                    107: #define vm_Float2r(_float,_x)          (_x=_float)
1.26      anton     108: 
                    109: /* conversion on store */
                    110: 
1.41      anton     111: #define vm_f2Cell(_x,_cell)            ((_cell)=(Cell)(_x))
                    112: #define vm_c2Cell(_x,_cell)            ((_cell)=(Cell)(_x))
                    113: #define vm_n2Cell(_x,_cell)            ((_cell)=(Cell)(_x))
                    114: #define vm_w2Cell(_x,_cell)            ((_cell)=(Cell)(_x))
                    115: #define vm_u2Cell(_x,_cell)            ((_cell)=(Cell)(_x))
                    116: #define vm_a_2Cell(_x,_cell)           ((_cell)=(Cell)(_x))
                    117: #define vm_c_2Cell(_x,_cell)           ((_cell)=(Cell)(_x))
                    118: #define vm_f_2Cell(_x,_cell)           ((_cell)=(Cell)(_x))
                    119: #define vm_df_2Cell(_x,_cell)          ((_cell)=(Cell)(_x))
                    120: #define vm_sf_2Cell(_x,_cell)          ((_cell)=(Cell)(_x))
                    121: #define vm_xt2Cell(_x,_cell)           ((_cell)=(Cell)(_x))
                    122: #define vm_f83name2Cell(_x,_cell)      ((_cell)=(Cell)(_x))
                    123: #define vm_longname2Cell(_x,_cell)     ((_cell)=(Cell)(_x))
                    124: #define vm_r2Float(_x,_float)          (_float=_x)
1.26      anton     125: 
1.41      anton     126: #define vm_Cell2Cell(_x,_y)            (_y=_x)
1.29      anton     127: 
1.46      anton     128: #ifdef NO_IP
                    129: #define IMM_ARG(access,value)          (VARIANT(value))
                    130: #else
                    131: #define IMM_ARG(access,value)          (access)
                    132: #endif
                    133: 
1.1       anton     134: /* if machine.h has not defined explicit registers, define them as implicit */
                    135: #ifndef IPREG
                    136: #define IPREG
                    137: #endif
                    138: #ifndef SPREG
                    139: #define SPREG
                    140: #endif
                    141: #ifndef RPREG
                    142: #define RPREG
                    143: #endif
                    144: #ifndef FPREG
                    145: #define FPREG
                    146: #endif
                    147: #ifndef LPREG
                    148: #define LPREG
                    149: #endif
                    150: #ifndef CFAREG
                    151: #define CFAREG
                    152: #endif
                    153: #ifndef UPREG
                    154: #define UPREG
                    155: #endif
                    156: #ifndef TOSREG
                    157: #define TOSREG
                    158: #endif
                    159: #ifndef FTOSREG
                    160: #define FTOSREG
                    161: #endif
                    162: 
                    163: #ifndef CPU_DEP1
                    164: # define CPU_DEP1 0
                    165: #endif
                    166: 
1.28      anton     167: /* instructions containing these must be the last instruction of a
                    168:    super-instruction (e.g., branches, EXECUTE, and other instructions
                    169:    ending the basic block). Instructions containing SET_IP get this
                    170:    automatically, so you usually don't have to write it.  If you have
                    171:    to write it, write it after IP points to the next instruction.
                    172:    Used for profiling.  Don't write it in a word containing SET_IP, or
                    173:    the following block will be counted twice. */
                    174: #ifdef VM_PROFILING
                    175: #define SUPER_END  vm_count_block(IP)
                    176: #else
                    177: #define SUPER_END
                    178: #endif
1.35      anton     179: #define SUPER_CONTINUE
1.46      anton     180: 
1.37      pazsan    181: #ifdef DEBUG
                    182: #define CFA_TO_NAME(__cfa) \
                    183:       Cell len, i; \
                    184:       char * name = __cfa; \
                    185:       for(i=0; i<32; i+=sizeof(Cell)) { \
                    186:         len = ((Cell*)name)[-1]; \
                    187:         if(len < 0) { \
                    188:          len &= 0x1F; \
                    189:           if((len+sizeof(Cell)) > i) break; \
                    190:        } len = 0; \
                    191:        name -= sizeof(Cell); \
                    192:       }
                    193: #endif
1.30      anton     194: 
1.50      anton     195: #if !defined(ENGINE)
                    196: /* normal engine */
                    197: #define VARIANT(v)     (v)
                    198: #define JUMP(target)   goto I_noop
1.51      anton     199: #define LABEL(name) J_##name: asm(""); I_##name:
1.50      anton     200: 
                    201: #elif ENGINE==2
                    202: /* variant with padding between VM instructions for finding out
                    203:    cross-inst jumps (for dynamic code) */
                    204: #define engine engine2
                    205: #define VARIANT(v)     (v)
                    206: #define JUMP(target)   goto I_noop
1.52      anton     207: #define LABEL(name) J_##name: SKIP16; I_##name:
1.50      anton     208: #define IN_ENGINE2
                    209: 
                    210: #elif ENGINE==3
                    211: /* variant with different immediate arguments for finding out
                    212:    immediate arguments (for native code) */
                    213: #define engine engine3
                    214: #define VARIANT(v)     ((v)^0xffffffff)
                    215: #define JUMP(target)   goto K_lit
1.51      anton     216: #define LABEL(name) J_##name: asm(""); I_##name:
1.50      anton     217: #else
                    218: #error illegal ENGINE value
                    219: #endif /* ENGINE */
                    220: 
                    221: #define LABEL2(name) K_##name:
                    222: 
                    223: 
                    224: Label *engine(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0)
1.1       anton     225: /* executes code at ip, if ip!=NULL
                    226:    returns array of machine code labels (for use in a loader), if ip==NULL
                    227: */
                    228: {
1.10      anton     229: #ifndef GFORTH_DEBUGGING
                    230:   register Cell *rp RPREG;
                    231: #endif
1.46      anton     232: #ifndef NO_IP
                    233:   register Xt *ip IPREG = ip0;
                    234: #endif
1.1       anton     235:   register Cell *sp SPREG = sp0;
                    236:   register Float *fp FPREG = fp0;
                    237:   register Address lp LPREG = lp0;
                    238:   register Xt cfa CFAREG;
1.11      anton     239: #ifdef MORE_VARS
                    240:   MORE_VARS
                    241: #endif
1.1       anton     242:   register Address up UPREG = UP;
1.24      anton     243:   IF_spTOS(register Cell spTOS TOSREG;)
                    244:   IF_fpTOS(register Float fpTOS FTOSREG;)
1.1       anton     245: #if defined(DOUBLY_INDIRECT)
                    246:   static Label *symbols;
                    247:   static void *routines[]= {
1.27      anton     248: #define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0]))
1.1       anton     249: #else /* !defined(DOUBLY_INDIRECT) */
                    250:   static Label symbols[]= {
1.27      anton     251: #define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0]))
1.1       anton     252: #endif /* !defined(DOUBLY_INDIRECT) */
1.4       pazsan    253:     (Label)&&docol,
                    254:     (Label)&&docon,
                    255:     (Label)&&dovar,
                    256:     (Label)&&douser,
                    257:     (Label)&&dodefer,
                    258:     (Label)&&dofield,
                    259:     (Label)&&dodoes,
1.1       anton     260:     /* the following entry is normally unused;
1.34      anton     261:        it is there because its index indicates a does-handler */
1.7       pazsan    262:     CPU_DEP1,
1.55      anton     263: #define INST_ADDR(name) ((Label)&&I_##name)
1.34      anton     264: #include "prim_lab.i"
                    265: #undef INST_ADDR
                    266:     (Label)&&after_last,
                    267:     (Label)0,
1.55      anton     268: #define INST_ADDR(name) ((Label)&&K_##name)
1.46      anton     269: #include "prim_lab.i"
                    270: #undef INST_ADDR
1.55      anton     271: #define INST_ADDR(name) ((Label)&&J_##name)
1.1       anton     272: #include "prim_lab.i"
1.34      anton     273: #undef INST_ADDR
1.1       anton     274:   };
                    275: #ifdef CPU_DEP2
                    276:   CPU_DEP2
                    277: #endif
                    278: 
1.10      anton     279:   rp = rp0;
1.1       anton     280: #ifdef DEBUG
                    281:   fprintf(stderr,"ip=%x, sp=%x, rp=%x, fp=%x, lp=%x, up=%x\n",
1.46      anton     282:           (unsigned)ip0,(unsigned)sp,(unsigned)rp,
1.1       anton     283:          (unsigned)fp,(unsigned)lp,(unsigned)up);
                    284: #endif
                    285: 
1.46      anton     286:   if (ip0 == NULL) {
1.1       anton     287: #if defined(DOUBLY_INDIRECT)
1.38      anton     288: #define CODE_OFFSET (26*sizeof(Cell))
                    289: #define XT_OFFSET (22*sizeof(Cell))
1.1       anton     290:     int i;
1.3       anton     291:     Cell code_offset = offset_image? CODE_OFFSET : 0;
1.38      anton     292:     Cell xt_offset = offset_image? XT_OFFSET : 0;
1.7       pazsan    293: 
1.3       anton     294:     symbols = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+CODE_OFFSET)+code_offset);
1.38      anton     295:     xts = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+XT_OFFSET)+xt_offset);
1.1       anton     296:     for (i=0; i<DOESJUMP+1; i++)
1.38      anton     297:       xts[i] = symbols[i] = (Label)routines[i];
1.1       anton     298:     for (; routines[i]!=0; i++) {
                    299:       if (i>=MAX_SYMBOLS) {
                    300:        fprintf(stderr,"gforth-ditc: more than %d primitives\n",MAX_SYMBOLS);
                    301:        exit(1);
1.20      anton     302:       }
1.38      anton     303:       xts[i] = symbols[i] = &routines[i];
1.1       anton     304:     }
1.20      anton     305: #endif /* defined(DOUBLY_INDIRECT) */
                    306:     return symbols;
1.7       pazsan    307:   }
1.1       anton     308: 
1.24      anton     309:   IF_spTOS(spTOS = sp[0]);
                    310:   IF_fpTOS(fpTOS = fp[0]);
1.7       pazsan    311: /*  prep_terminal(); */
1.46      anton     312: #ifdef NO_IP
                    313:   goto *(*(Label *)ip0);
                    314: #else
1.11      anton     315:   SET_IP(ip);
1.28      anton     316:   SUPER_END; /* count the first block, too */
1.1       anton     317:   NEXT;
1.46      anton     318: #endif
1.11      anton     319: 
1.1       anton     320: #ifdef CPU_DEP3
                    321:   CPU_DEP3
                    322: #endif
                    323:   
                    324:  docol:
                    325:   {
1.46      anton     326: #ifdef NO_IP
                    327:     *--rp = next_code;
                    328:     goto **(Label *)PFA1(cfa);
                    329: #else
1.1       anton     330: #ifdef DEBUG
1.37      pazsan    331:     {
                    332:       CFA_TO_NAME(cfa);
                    333:       fprintf(stderr,"%08lx: col: %08lx %.*s\n",(Cell)ip,(Cell)PFA1(cfa),
                    334:              len,name);
                    335:     }
1.1       anton     336: #endif
                    337: #ifdef CISC_NEXT
                    338:     /* this is the simple version */
                    339:     *--rp = (Cell)ip;
1.11      anton     340:     SET_IP((Xt *)PFA1(cfa));
1.28      anton     341:     SUPER_END;
1.1       anton     342:     NEXT;
                    343: #else
1.11      anton     344:     /* this one is important, so we help the compiler optimizing */
1.1       anton     345:     {
                    346:       DEF_CA
1.11      anton     347:       rp[-1] = (Cell)ip;
                    348:       SET_IP((Xt *)PFA1(cfa));
1.28      anton     349:       SUPER_END;
1.11      anton     350:       NEXT_P1;
                    351:       rp--;
                    352:       NEXT_P2;
1.1       anton     353:     }
                    354: #endif
1.46      anton     355: #endif
1.1       anton     356:   }
                    357: 
                    358:  docon:
                    359:   {
                    360: #ifdef DEBUG
                    361:     fprintf(stderr,"%08lx: con: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));
                    362: #endif
                    363: #ifdef USE_TOS
1.24      anton     364:     *sp-- = spTOS;
                    365:     spTOS = *(Cell *)PFA1(cfa);
1.1       anton     366: #else
                    367:     *--sp = *(Cell *)PFA1(cfa);
                    368: #endif
                    369:   }
1.46      anton     370: #ifdef NO_IP
                    371:   goto *next_code;
                    372: #else
1.1       anton     373:   NEXT_P0;
                    374:   NEXT;
1.46      anton     375: #endif
1.1       anton     376:   
                    377:  dovar:
                    378:   {
                    379: #ifdef DEBUG
                    380:     fprintf(stderr,"%08lx: var: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
                    381: #endif
                    382: #ifdef USE_TOS
1.24      anton     383:     *sp-- = spTOS;
                    384:     spTOS = (Cell)PFA1(cfa);
1.1       anton     385: #else
                    386:     *--sp = (Cell)PFA1(cfa);
                    387: #endif
                    388:   }
1.46      anton     389: #ifdef NO_IP
                    390:   goto *next_code;
                    391: #else
1.1       anton     392:   NEXT_P0;
                    393:   NEXT;
1.46      anton     394: #endif
1.1       anton     395:   
                    396:  douser:
                    397:   {
                    398: #ifdef DEBUG
                    399:     fprintf(stderr,"%08lx: user: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
                    400: #endif
                    401: #ifdef USE_TOS
1.24      anton     402:     *sp-- = spTOS;
                    403:     spTOS = (Cell)(up+*(Cell*)PFA1(cfa));
1.1       anton     404: #else
                    405:     *--sp = (Cell)(up+*(Cell*)PFA1(cfa));
                    406: #endif
                    407:   }
1.46      anton     408: #ifdef NO_IP
                    409:   goto *next_code;
                    410: #else
1.1       anton     411:   NEXT_P0;
                    412:   NEXT;
1.46      anton     413: #endif
1.1       anton     414:   
                    415:  dodefer:
                    416:   {
                    417: #ifdef DEBUG
                    418:     fprintf(stderr,"%08lx: defer: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));
                    419: #endif
1.28      anton     420:     SUPER_END;
1.1       anton     421:     EXEC(*(Xt *)PFA1(cfa));
                    422:   }
                    423: 
                    424:  dofield:
                    425:   {
                    426: #ifdef DEBUG
                    427:     fprintf(stderr,"%08lx: field: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
                    428: #endif
1.24      anton     429:     spTOS += *(Cell*)PFA1(cfa);
1.1       anton     430:   }
1.46      anton     431: #ifdef NO_IP
                    432:   goto *next_code;
                    433: #else
1.1       anton     434:   NEXT_P0;
                    435:   NEXT;
1.46      anton     436: #endif
1.1       anton     437: 
                    438:  dodoes:
                    439:   /* this assumes the following structure:
                    440:      defining-word:
                    441:      
                    442:      ...
                    443:      DOES>
                    444:      (possible padding)
                    445:      possibly handler: jmp dodoes
                    446:      (possible branch delay slot(s))
                    447:      Forth code after DOES>
                    448:      
                    449:      defined word:
                    450:      
                    451:      cfa: address of or jump to handler OR
                    452:           address of or jump to dodoes, address of DOES-code
                    453:      pfa:
                    454:      
                    455:      */
1.46      anton     456: #ifdef NO_IP
                    457:   *--rp = next_code;
                    458:   IF_spTOS(spTOS = sp[0]);
                    459:   sp--;
                    460:   spTOS = (Cell)PFA(cfa);
                    461:   goto **(Label *)DOES_CODE1(cfa);
                    462: #else
1.1       anton     463:   {
                    464:     /*    fprintf(stderr, "Got CFA %08lx at doescode %08lx/%08lx: does: %08lx\n",cfa,(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa));*/
                    465: #ifdef DEBUG
                    466:     fprintf(stderr,"%08lx/%08lx: does: %08lx\n",(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa));
                    467:     fflush(stderr);
                    468: #endif
                    469:     *--rp = (Cell)ip;
                    470:     /* PFA1 might collide with DOES_CODE1 here, so we use PFA */
                    471: #ifdef USE_TOS
1.24      anton     472:     *sp-- = spTOS;
                    473:     spTOS = (Cell)PFA(cfa);
1.1       anton     474: #else
                    475:     *--sp = (Cell)PFA(cfa);
                    476: #endif
1.11      anton     477:     SET_IP(DOES_CODE1(cfa));
1.28      anton     478:     SUPER_END;
1.24      anton     479:     /*    fprintf(stderr,"TOS = %08lx, IP=%08lx\n", spTOS, IP);*/
1.1       anton     480:   }
                    481:   NEXT;
1.46      anton     482: #endif
1.1       anton     483: 
                    484: #include "prim.i"
1.34      anton     485:   after_last: return (Label *)0;
                    486:   /*needed only to get the length of the last primitive */
1.50      anton     487: }

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