Annotation of gforth/engine/engine.c, revision 1.50

1.1       anton       1: /* Gforth virtual machine (aka inner interpreter)
                      2: 
1.22      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: 
                     67: #define IOR(flag)      ((flag)? -512-errno : 0)
                     68: 
1.4       pazsan     69: struct F83Name {
                     70:   struct F83Name *next;  /* the link field for old hands */
                     71:   char         countetc;
                     72:   char         name[0];
                     73: };
1.1       anton      74: 
                     75: #define F83NAME_COUNT(np)      ((np)->countetc & 0x1f)
1.25      anton      76: 
                     77: struct Longname {
                     78:   struct Longname *next;  /* the link field for old hands */
                     79:   Cell         countetc;
                     80:   char         name[0];
                     81: };
                     82: 
                     83: #define LONGNAME_COUNT(np)     ((np)->countetc & (((~((UCell)0))<<3)>>3))
1.1       anton      84: 
                     85: #define NULLC '\0'
                     86: 
1.14      pazsan     87: #ifdef MEMCMP_AS_SUBROUTINE
                     88: extern int gforth_memcmp(const char * s1, const char * s2, size_t n);
1.15      anton      89: #define memcmp(s1,s2,n) gforth_memcmp(s1,s2,n)
1.14      pazsan     90: #endif
                     91: 
1.1       anton      92: #define NEWLINE        '\n'
                     93: 
1.26      anton      94: /* conversion on fetch */
                     95: 
1.41      anton      96: #define vm_Cell2f(_cell,_x)            ((_x)=(Bool)(_cell))
                     97: #define vm_Cell2c(_cell,_x)            ((_x)=(Char)(_cell))
                     98: #define vm_Cell2n(_cell,_x)            ((_x)=(Cell)(_cell))
                     99: #define vm_Cell2w(_cell,_x)            ((_x)=(Cell)(_cell))
                    100: #define vm_Cell2u(_cell,_x)            ((_x)=(UCell)(_cell))
                    101: #define vm_Cell2a_(_cell,_x)           ((_x)=(Cell *)(_cell))
                    102: #define vm_Cell2c_(_cell,_x)           ((_x)=(Char *)(_cell))
                    103: #define vm_Cell2f_(_cell,_x)           ((_x)=(Float *)(_cell))
                    104: #define vm_Cell2df_(_cell,_x)          ((_x)=(DFloat *)(_cell))
                    105: #define vm_Cell2sf_(_cell,_x)          ((_x)=(SFloat *)(_cell))
                    106: #define vm_Cell2xt(_cell,_x)           ((_x)=(Xt)(_cell))
                    107: #define vm_Cell2f83name(_cell,_x)      ((_x)=(struct F83Name *)(_cell))
                    108: #define vm_Cell2longname(_cell,_x)     ((_x)=(struct Longname *)(_cell))
                    109: #define vm_Float2r(_float,_x)          (_x=_float)
1.26      anton     110: 
                    111: /* conversion on store */
                    112: 
1.41      anton     113: #define vm_f2Cell(_x,_cell)            ((_cell)=(Cell)(_x))
                    114: #define vm_c2Cell(_x,_cell)            ((_cell)=(Cell)(_x))
                    115: #define vm_n2Cell(_x,_cell)            ((_cell)=(Cell)(_x))
                    116: #define vm_w2Cell(_x,_cell)            ((_cell)=(Cell)(_x))
                    117: #define vm_u2Cell(_x,_cell)            ((_cell)=(Cell)(_x))
                    118: #define vm_a_2Cell(_x,_cell)           ((_cell)=(Cell)(_x))
                    119: #define vm_c_2Cell(_x,_cell)           ((_cell)=(Cell)(_x))
                    120: #define vm_f_2Cell(_x,_cell)           ((_cell)=(Cell)(_x))
                    121: #define vm_df_2Cell(_x,_cell)          ((_cell)=(Cell)(_x))
                    122: #define vm_sf_2Cell(_x,_cell)          ((_cell)=(Cell)(_x))
                    123: #define vm_xt2Cell(_x,_cell)           ((_cell)=(Cell)(_x))
                    124: #define vm_f83name2Cell(_x,_cell)      ((_cell)=(Cell)(_x))
                    125: #define vm_longname2Cell(_x,_cell)     ((_cell)=(Cell)(_x))
                    126: #define vm_r2Float(_x,_float)          (_float=_x)
1.26      anton     127: 
1.41      anton     128: #define vm_Cell2Cell(_x,_y)            (_y=_x)
1.29      anton     129: 
1.46      anton     130: #ifdef NO_IP
                    131: #define IMM_ARG(access,value)          (VARIANT(value))
                    132: #else
                    133: #define IMM_ARG(access,value)          (access)
                    134: #endif
                    135: 
1.1       anton     136: /* if machine.h has not defined explicit registers, define them as implicit */
                    137: #ifndef IPREG
                    138: #define IPREG
                    139: #endif
                    140: #ifndef SPREG
                    141: #define SPREG
                    142: #endif
                    143: #ifndef RPREG
                    144: #define RPREG
                    145: #endif
                    146: #ifndef FPREG
                    147: #define FPREG
                    148: #endif
                    149: #ifndef LPREG
                    150: #define LPREG
                    151: #endif
                    152: #ifndef CFAREG
                    153: #define CFAREG
                    154: #endif
                    155: #ifndef UPREG
                    156: #define UPREG
                    157: #endif
                    158: #ifndef TOSREG
                    159: #define TOSREG
                    160: #endif
                    161: #ifndef FTOSREG
                    162: #define FTOSREG
                    163: #endif
                    164: 
                    165: #ifndef CPU_DEP1
                    166: # define CPU_DEP1 0
                    167: #endif
                    168: 
1.28      anton     169: /* instructions containing these must be the last instruction of a
                    170:    super-instruction (e.g., branches, EXECUTE, and other instructions
                    171:    ending the basic block). Instructions containing SET_IP get this
                    172:    automatically, so you usually don't have to write it.  If you have
                    173:    to write it, write it after IP points to the next instruction.
                    174:    Used for profiling.  Don't write it in a word containing SET_IP, or
                    175:    the following block will be counted twice. */
                    176: #ifdef VM_PROFILING
                    177: #define SUPER_END  vm_count_block(IP)
                    178: #else
                    179: #define SUPER_END
                    180: #endif
1.35      anton     181: #define SUPER_CONTINUE
1.46      anton     182: 
1.37      pazsan    183: #ifdef DEBUG
                    184: #define CFA_TO_NAME(__cfa) \
                    185:       Cell len, i; \
                    186:       char * name = __cfa; \
                    187:       for(i=0; i<32; i+=sizeof(Cell)) { \
                    188:         len = ((Cell*)name)[-1]; \
                    189:         if(len < 0) { \
                    190:          len &= 0x1F; \
                    191:           if((len+sizeof(Cell)) > i) break; \
                    192:        } len = 0; \
                    193:        name -= sizeof(Cell); \
                    194:       }
                    195: #endif
1.30      anton     196: 
1.50    ! anton     197: #if !defined(ENGINE)
        !           198: /* normal engine */
        !           199: #define VARIANT(v)     (v)
        !           200: #define JUMP(target)   goto I_noop
        !           201: #define LABEL(name) I_##name:
        !           202: 
        !           203: #elif ENGINE==2
        !           204: /* variant with padding between VM instructions for finding out
        !           205:    cross-inst jumps (for dynamic code) */
        !           206: #define engine engine2
        !           207: #define VARIANT(v)     (v)
        !           208: #define JUMP(target)   goto I_noop
        !           209: #define LABEL(name) J_##name: asm(".skip 16"); I_##name:
        !           210: #define IN_ENGINE2
        !           211: 
        !           212: #elif ENGINE==3
        !           213: /* variant with different immediate arguments for finding out
        !           214:    immediate arguments (for native code) */
        !           215: #define engine engine3
        !           216: #define VARIANT(v)     ((v)^0xffffffff)
        !           217: #define JUMP(target)   goto K_lit
        !           218: #define LABEL(name) I_##name:
        !           219: #else
        !           220: #error illegal ENGINE value
        !           221: #endif /* ENGINE */
        !           222: 
        !           223: #define LABEL2(name) K_##name:
        !           224: 
        !           225: 
        !           226: Label *engine(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0)
1.1       anton     227: /* executes code at ip, if ip!=NULL
                    228:    returns array of machine code labels (for use in a loader), if ip==NULL
                    229: */
                    230: {
1.10      anton     231: #ifndef GFORTH_DEBUGGING
                    232:   register Cell *rp RPREG;
                    233: #endif
1.46      anton     234: #ifndef NO_IP
                    235:   register Xt *ip IPREG = ip0;
                    236: #endif
1.1       anton     237:   register Cell *sp SPREG = sp0;
                    238:   register Float *fp FPREG = fp0;
                    239:   register Address lp LPREG = lp0;
                    240:   register Xt cfa CFAREG;
1.11      anton     241: #ifdef MORE_VARS
                    242:   MORE_VARS
                    243: #endif
1.1       anton     244:   register Address up UPREG = UP;
1.24      anton     245:   IF_spTOS(register Cell spTOS TOSREG;)
                    246:   IF_fpTOS(register Float fpTOS FTOSREG;)
1.1       anton     247: #if defined(DOUBLY_INDIRECT)
                    248:   static Label *symbols;
                    249:   static void *routines[]= {
1.27      anton     250: #define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0]))
1.1       anton     251: #else /* !defined(DOUBLY_INDIRECT) */
                    252:   static Label symbols[]= {
1.27      anton     253: #define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0]))
1.1       anton     254: #endif /* !defined(DOUBLY_INDIRECT) */
1.4       pazsan    255:     (Label)&&docol,
                    256:     (Label)&&docon,
                    257:     (Label)&&dovar,
                    258:     (Label)&&douser,
                    259:     (Label)&&dodefer,
                    260:     (Label)&&dofield,
                    261:     (Label)&&dodoes,
1.1       anton     262:     /* the following entry is normally unused;
1.34      anton     263:        it is there because its index indicates a does-handler */
1.7       pazsan    264:     CPU_DEP1,
1.34      anton     265: #define INST_ADDR(name) (Label)&&I_##name
                    266: #include "prim_lab.i"
                    267: #undef INST_ADDR
                    268:     (Label)&&after_last,
                    269:     (Label)0,
1.46      anton     270: #define INST_ADDR(name) (Label)&&K_##name
                    271: #include "prim_lab.i"
                    272: #undef INST_ADDR
1.34      anton     273: #ifdef IN_ENGINE2
                    274: #define INST_ADDR(name) (Label)&&J_##name
1.1       anton     275: #include "prim_lab.i"
1.34      anton     276: #undef INST_ADDR
                    277: #endif
1.1       anton     278:   };
                    279: #ifdef CPU_DEP2
                    280:   CPU_DEP2
                    281: #endif
                    282: 
1.10      anton     283:   rp = rp0;
1.1       anton     284: #ifdef DEBUG
                    285:   fprintf(stderr,"ip=%x, sp=%x, rp=%x, fp=%x, lp=%x, up=%x\n",
1.46      anton     286:           (unsigned)ip0,(unsigned)sp,(unsigned)rp,
1.1       anton     287:          (unsigned)fp,(unsigned)lp,(unsigned)up);
                    288: #endif
                    289: 
1.46      anton     290:   if (ip0 == NULL) {
1.1       anton     291: #if defined(DOUBLY_INDIRECT)
1.38      anton     292: #define CODE_OFFSET (26*sizeof(Cell))
                    293: #define XT_OFFSET (22*sizeof(Cell))
1.1       anton     294:     int i;
1.3       anton     295:     Cell code_offset = offset_image? CODE_OFFSET : 0;
1.38      anton     296:     Cell xt_offset = offset_image? XT_OFFSET : 0;
1.7       pazsan    297: 
1.3       anton     298:     symbols = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+CODE_OFFSET)+code_offset);
1.38      anton     299:     xts = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+XT_OFFSET)+xt_offset);
1.1       anton     300:     for (i=0; i<DOESJUMP+1; i++)
1.38      anton     301:       xts[i] = symbols[i] = (Label)routines[i];
1.1       anton     302:     for (; routines[i]!=0; i++) {
                    303:       if (i>=MAX_SYMBOLS) {
                    304:        fprintf(stderr,"gforth-ditc: more than %d primitives\n",MAX_SYMBOLS);
                    305:        exit(1);
1.20      anton     306:       }
1.38      anton     307:       xts[i] = symbols[i] = &routines[i];
1.1       anton     308:     }
1.20      anton     309: #endif /* defined(DOUBLY_INDIRECT) */
                    310:     return symbols;
1.7       pazsan    311:   }
1.1       anton     312: 
1.24      anton     313:   IF_spTOS(spTOS = sp[0]);
                    314:   IF_fpTOS(fpTOS = fp[0]);
1.7       pazsan    315: /*  prep_terminal(); */
1.46      anton     316: #ifdef NO_IP
                    317:   goto *(*(Label *)ip0);
                    318: #else
1.11      anton     319:   SET_IP(ip);
1.28      anton     320:   SUPER_END; /* count the first block, too */
1.1       anton     321:   NEXT;
1.46      anton     322: #endif
1.11      anton     323: 
1.1       anton     324: #ifdef CPU_DEP3
                    325:   CPU_DEP3
                    326: #endif
                    327:   
                    328:  docol:
                    329:   {
1.46      anton     330: #ifdef NO_IP
                    331:     *--rp = next_code;
                    332:     goto **(Label *)PFA1(cfa);
                    333: #else
1.1       anton     334: #ifdef DEBUG
1.37      pazsan    335:     {
                    336:       CFA_TO_NAME(cfa);
                    337:       fprintf(stderr,"%08lx: col: %08lx %.*s\n",(Cell)ip,(Cell)PFA1(cfa),
                    338:              len,name);
                    339:     }
1.1       anton     340: #endif
                    341: #ifdef CISC_NEXT
                    342:     /* this is the simple version */
                    343:     *--rp = (Cell)ip;
1.11      anton     344:     SET_IP((Xt *)PFA1(cfa));
1.28      anton     345:     SUPER_END;
1.1       anton     346:     NEXT;
                    347: #else
1.11      anton     348:     /* this one is important, so we help the compiler optimizing */
1.1       anton     349:     {
                    350:       DEF_CA
1.11      anton     351:       rp[-1] = (Cell)ip;
                    352:       SET_IP((Xt *)PFA1(cfa));
1.28      anton     353:       SUPER_END;
1.11      anton     354:       NEXT_P1;
                    355:       rp--;
                    356:       NEXT_P2;
1.1       anton     357:     }
                    358: #endif
1.46      anton     359: #endif
1.1       anton     360:   }
                    361: 
                    362:  docon:
                    363:   {
                    364: #ifdef DEBUG
                    365:     fprintf(stderr,"%08lx: con: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));
                    366: #endif
                    367: #ifdef USE_TOS
1.24      anton     368:     *sp-- = spTOS;
                    369:     spTOS = *(Cell *)PFA1(cfa);
1.1       anton     370: #else
                    371:     *--sp = *(Cell *)PFA1(cfa);
                    372: #endif
                    373:   }
1.46      anton     374: #ifdef NO_IP
                    375:   goto *next_code;
                    376: #else
1.1       anton     377:   NEXT_P0;
                    378:   NEXT;
1.46      anton     379: #endif
1.1       anton     380:   
                    381:  dovar:
                    382:   {
                    383: #ifdef DEBUG
                    384:     fprintf(stderr,"%08lx: var: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
                    385: #endif
                    386: #ifdef USE_TOS
1.24      anton     387:     *sp-- = spTOS;
                    388:     spTOS = (Cell)PFA1(cfa);
1.1       anton     389: #else
                    390:     *--sp = (Cell)PFA1(cfa);
                    391: #endif
                    392:   }
1.46      anton     393: #ifdef NO_IP
                    394:   goto *next_code;
                    395: #else
1.1       anton     396:   NEXT_P0;
                    397:   NEXT;
1.46      anton     398: #endif
1.1       anton     399:   
                    400:  douser:
                    401:   {
                    402: #ifdef DEBUG
                    403:     fprintf(stderr,"%08lx: user: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
                    404: #endif
                    405: #ifdef USE_TOS
1.24      anton     406:     *sp-- = spTOS;
                    407:     spTOS = (Cell)(up+*(Cell*)PFA1(cfa));
1.1       anton     408: #else
                    409:     *--sp = (Cell)(up+*(Cell*)PFA1(cfa));
                    410: #endif
                    411:   }
1.46      anton     412: #ifdef NO_IP
                    413:   goto *next_code;
                    414: #else
1.1       anton     415:   NEXT_P0;
                    416:   NEXT;
1.46      anton     417: #endif
1.1       anton     418:   
                    419:  dodefer:
                    420:   {
                    421: #ifdef DEBUG
                    422:     fprintf(stderr,"%08lx: defer: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));
                    423: #endif
1.28      anton     424:     SUPER_END;
1.1       anton     425:     EXEC(*(Xt *)PFA1(cfa));
                    426:   }
                    427: 
                    428:  dofield:
                    429:   {
                    430: #ifdef DEBUG
                    431:     fprintf(stderr,"%08lx: field: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
                    432: #endif
1.24      anton     433:     spTOS += *(Cell*)PFA1(cfa);
1.1       anton     434:   }
1.46      anton     435: #ifdef NO_IP
                    436:   goto *next_code;
                    437: #else
1.1       anton     438:   NEXT_P0;
                    439:   NEXT;
1.46      anton     440: #endif
1.1       anton     441: 
                    442:  dodoes:
                    443:   /* this assumes the following structure:
                    444:      defining-word:
                    445:      
                    446:      ...
                    447:      DOES>
                    448:      (possible padding)
                    449:      possibly handler: jmp dodoes
                    450:      (possible branch delay slot(s))
                    451:      Forth code after DOES>
                    452:      
                    453:      defined word:
                    454:      
                    455:      cfa: address of or jump to handler OR
                    456:           address of or jump to dodoes, address of DOES-code
                    457:      pfa:
                    458:      
                    459:      */
1.46      anton     460: #ifdef NO_IP
                    461:   *--rp = next_code;
                    462:   IF_spTOS(spTOS = sp[0]);
                    463:   sp--;
                    464:   spTOS = (Cell)PFA(cfa);
                    465:   goto **(Label *)DOES_CODE1(cfa);
                    466: #else
1.1       anton     467:   {
                    468:     /*    fprintf(stderr, "Got CFA %08lx at doescode %08lx/%08lx: does: %08lx\n",cfa,(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa));*/
                    469: #ifdef DEBUG
                    470:     fprintf(stderr,"%08lx/%08lx: does: %08lx\n",(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa));
                    471:     fflush(stderr);
                    472: #endif
                    473:     *--rp = (Cell)ip;
                    474:     /* PFA1 might collide with DOES_CODE1 here, so we use PFA */
                    475: #ifdef USE_TOS
1.24      anton     476:     *sp-- = spTOS;
                    477:     spTOS = (Cell)PFA(cfa);
1.1       anton     478: #else
                    479:     *--sp = (Cell)PFA(cfa);
                    480: #endif
1.11      anton     481:     SET_IP(DOES_CODE1(cfa));
1.28      anton     482:     SUPER_END;
1.24      anton     483:     /*    fprintf(stderr,"TOS = %08lx, IP=%08lx\n", spTOS, IP);*/
1.1       anton     484:   }
                    485:   NEXT;
1.46      anton     486: #endif
1.1       anton     487: 
                    488: #include "prim.i"
1.34      anton     489:   after_last: return (Label *)0;
                    490:   /*needed only to get the length of the last primitive */
1.50    ! anton     491: }

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