Annotation of gforth/engine/engine.c, revision 1.60

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: 
1.1       anton      75: #define NULLC '\0'
                     76: 
1.14      pazsan     77: #ifdef MEMCMP_AS_SUBROUTINE
                     78: extern int gforth_memcmp(const char * s1, const char * s2, size_t n);
1.15      anton      79: #define memcmp(s1,s2,n) gforth_memcmp(s1,s2,n)
1.14      pazsan     80: #endif
                     81: 
1.1       anton      82: #define NEWLINE        '\n'
                     83: 
1.26      anton      84: /* conversion on fetch */
                     85: 
1.41      anton      86: #define vm_Cell2f(_cell,_x)            ((_x)=(Bool)(_cell))
                     87: #define vm_Cell2c(_cell,_x)            ((_x)=(Char)(_cell))
                     88: #define vm_Cell2n(_cell,_x)            ((_x)=(Cell)(_cell))
                     89: #define vm_Cell2w(_cell,_x)            ((_x)=(Cell)(_cell))
                     90: #define vm_Cell2u(_cell,_x)            ((_x)=(UCell)(_cell))
                     91: #define vm_Cell2a_(_cell,_x)           ((_x)=(Cell *)(_cell))
                     92: #define vm_Cell2c_(_cell,_x)           ((_x)=(Char *)(_cell))
                     93: #define vm_Cell2f_(_cell,_x)           ((_x)=(Float *)(_cell))
                     94: #define vm_Cell2df_(_cell,_x)          ((_x)=(DFloat *)(_cell))
                     95: #define vm_Cell2sf_(_cell,_x)          ((_x)=(SFloat *)(_cell))
                     96: #define vm_Cell2xt(_cell,_x)           ((_x)=(Xt)(_cell))
                     97: #define vm_Cell2f83name(_cell,_x)      ((_x)=(struct F83Name *)(_cell))
                     98: #define vm_Cell2longname(_cell,_x)     ((_x)=(struct Longname *)(_cell))
                     99: #define vm_Float2r(_float,_x)          (_x=_float)
1.26      anton     100: 
                    101: /* conversion on store */
                    102: 
1.41      anton     103: #define vm_f2Cell(_x,_cell)            ((_cell)=(Cell)(_x))
                    104: #define vm_c2Cell(_x,_cell)            ((_cell)=(Cell)(_x))
                    105: #define vm_n2Cell(_x,_cell)            ((_cell)=(Cell)(_x))
                    106: #define vm_w2Cell(_x,_cell)            ((_cell)=(Cell)(_x))
                    107: #define vm_u2Cell(_x,_cell)            ((_cell)=(Cell)(_x))
                    108: #define vm_a_2Cell(_x,_cell)           ((_cell)=(Cell)(_x))
                    109: #define vm_c_2Cell(_x,_cell)           ((_cell)=(Cell)(_x))
                    110: #define vm_f_2Cell(_x,_cell)           ((_cell)=(Cell)(_x))
                    111: #define vm_df_2Cell(_x,_cell)          ((_cell)=(Cell)(_x))
                    112: #define vm_sf_2Cell(_x,_cell)          ((_cell)=(Cell)(_x))
                    113: #define vm_xt2Cell(_x,_cell)           ((_cell)=(Cell)(_x))
                    114: #define vm_f83name2Cell(_x,_cell)      ((_cell)=(Cell)(_x))
                    115: #define vm_longname2Cell(_x,_cell)     ((_cell)=(Cell)(_x))
                    116: #define vm_r2Float(_x,_float)          (_float=_x)
1.26      anton     117: 
1.41      anton     118: #define vm_Cell2Cell(_x,_y)            (_y=_x)
1.29      anton     119: 
1.46      anton     120: #ifdef NO_IP
                    121: #define IMM_ARG(access,value)          (VARIANT(value))
                    122: #else
                    123: #define IMM_ARG(access,value)          (access)
                    124: #endif
                    125: 
1.1       anton     126: /* if machine.h has not defined explicit registers, define them as implicit */
                    127: #ifndef IPREG
                    128: #define IPREG
                    129: #endif
                    130: #ifndef SPREG
                    131: #define SPREG
                    132: #endif
                    133: #ifndef RPREG
                    134: #define RPREG
                    135: #endif
                    136: #ifndef FPREG
                    137: #define FPREG
                    138: #endif
                    139: #ifndef LPREG
                    140: #define LPREG
                    141: #endif
                    142: #ifndef CFAREG
                    143: #define CFAREG
                    144: #endif
                    145: #ifndef UPREG
                    146: #define UPREG
                    147: #endif
                    148: #ifndef TOSREG
                    149: #define TOSREG
                    150: #endif
                    151: #ifndef FTOSREG
                    152: #define FTOSREG
                    153: #endif
                    154: 
                    155: #ifndef CPU_DEP1
                    156: # define CPU_DEP1 0
                    157: #endif
                    158: 
1.28      anton     159: /* instructions containing these must be the last instruction of a
                    160:    super-instruction (e.g., branches, EXECUTE, and other instructions
                    161:    ending the basic block). Instructions containing SET_IP get this
                    162:    automatically, so you usually don't have to write it.  If you have
                    163:    to write it, write it after IP points to the next instruction.
                    164:    Used for profiling.  Don't write it in a word containing SET_IP, or
                    165:    the following block will be counted twice. */
                    166: #ifdef VM_PROFILING
                    167: #define SUPER_END  vm_count_block(IP)
                    168: #else
                    169: #define SUPER_END
                    170: #endif
1.35      anton     171: #define SUPER_CONTINUE
1.46      anton     172: 
1.37      pazsan    173: #ifdef DEBUG
                    174: #define CFA_TO_NAME(__cfa) \
                    175:       Cell len, i; \
                    176:       char * name = __cfa; \
                    177:       for(i=0; i<32; i+=sizeof(Cell)) { \
                    178:         len = ((Cell*)name)[-1]; \
                    179:         if(len < 0) { \
                    180:          len &= 0x1F; \
                    181:           if((len+sizeof(Cell)) > i) break; \
                    182:        } len = 0; \
                    183:        name -= sizeof(Cell); \
                    184:       }
                    185: #endif
1.30      anton     186: 
1.50      anton     187: #if !defined(ENGINE)
                    188: /* normal engine */
                    189: #define VARIANT(v)     (v)
                    190: #define JUMP(target)   goto I_noop
1.51      anton     191: #define LABEL(name) J_##name: asm(""); I_##name:
1.50      anton     192: 
                    193: #elif ENGINE==2
                    194: /* variant with padding between VM instructions for finding out
                    195:    cross-inst jumps (for dynamic code) */
                    196: #define engine engine2
                    197: #define VARIANT(v)     (v)
                    198: #define JUMP(target)   goto I_noop
1.52      anton     199: #define LABEL(name) J_##name: SKIP16; I_##name:
1.50      anton     200: #define IN_ENGINE2
                    201: 
                    202: #elif ENGINE==3
                    203: /* variant with different immediate arguments for finding out
                    204:    immediate arguments (for native code) */
                    205: #define engine engine3
                    206: #define VARIANT(v)     ((v)^0xffffffff)
                    207: #define JUMP(target)   goto K_lit
1.51      anton     208: #define LABEL(name) J_##name: asm(""); I_##name:
1.50      anton     209: #else
                    210: #error illegal ENGINE value
                    211: #endif /* ENGINE */
                    212: 
                    213: #define LABEL2(name) K_##name:
                    214: 
                    215: 
                    216: Label *engine(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0)
1.1       anton     217: /* executes code at ip, if ip!=NULL
                    218:    returns array of machine code labels (for use in a loader), if ip==NULL
                    219: */
                    220: {
1.10      anton     221: #ifndef GFORTH_DEBUGGING
                    222:   register Cell *rp RPREG;
                    223: #endif
1.46      anton     224: #ifndef NO_IP
                    225:   register Xt *ip IPREG = ip0;
                    226: #endif
1.1       anton     227:   register Cell *sp SPREG = sp0;
                    228:   register Float *fp FPREG = fp0;
                    229:   register Address lp LPREG = lp0;
                    230:   register Xt cfa CFAREG;
1.11      anton     231: #ifdef MORE_VARS
                    232:   MORE_VARS
                    233: #endif
1.1       anton     234:   register Address up UPREG = UP;
1.24      anton     235:   IF_spTOS(register Cell spTOS TOSREG;)
                    236:   IF_fpTOS(register Float fpTOS FTOSREG;)
1.1       anton     237: #if defined(DOUBLY_INDIRECT)
                    238:   static Label *symbols;
                    239:   static void *routines[]= {
1.27      anton     240: #define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0]))
1.1       anton     241: #else /* !defined(DOUBLY_INDIRECT) */
                    242:   static Label symbols[]= {
1.27      anton     243: #define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0]))
1.1       anton     244: #endif /* !defined(DOUBLY_INDIRECT) */
1.4       pazsan    245:     (Label)&&docol,
                    246:     (Label)&&docon,
                    247:     (Label)&&dovar,
                    248:     (Label)&&douser,
                    249:     (Label)&&dodefer,
                    250:     (Label)&&dofield,
                    251:     (Label)&&dodoes,
1.1       anton     252:     /* the following entry is normally unused;
1.34      anton     253:        it is there because its index indicates a does-handler */
1.7       pazsan    254:     CPU_DEP1,
1.55      anton     255: #define INST_ADDR(name) ((Label)&&I_##name)
1.34      anton     256: #include "prim_lab.i"
                    257: #undef INST_ADDR
                    258:     (Label)&&after_last,
                    259:     (Label)0,
1.55      anton     260: #define INST_ADDR(name) ((Label)&&K_##name)
1.46      anton     261: #include "prim_lab.i"
                    262: #undef INST_ADDR
1.55      anton     263: #define INST_ADDR(name) ((Label)&&J_##name)
1.1       anton     264: #include "prim_lab.i"
1.34      anton     265: #undef INST_ADDR
1.1       anton     266:   };
                    267: #ifdef CPU_DEP2
                    268:   CPU_DEP2
                    269: #endif
                    270: 
1.10      anton     271:   rp = rp0;
1.1       anton     272: #ifdef DEBUG
                    273:   fprintf(stderr,"ip=%x, sp=%x, rp=%x, fp=%x, lp=%x, up=%x\n",
1.46      anton     274:           (unsigned)ip0,(unsigned)sp,(unsigned)rp,
1.1       anton     275:          (unsigned)fp,(unsigned)lp,(unsigned)up);
                    276: #endif
                    277: 
1.46      anton     278:   if (ip0 == NULL) {
1.1       anton     279: #if defined(DOUBLY_INDIRECT)
1.38      anton     280: #define CODE_OFFSET (26*sizeof(Cell))
                    281: #define XT_OFFSET (22*sizeof(Cell))
1.1       anton     282:     int i;
1.3       anton     283:     Cell code_offset = offset_image? CODE_OFFSET : 0;
1.38      anton     284:     Cell xt_offset = offset_image? XT_OFFSET : 0;
1.7       pazsan    285: 
1.3       anton     286:     symbols = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+CODE_OFFSET)+code_offset);
1.38      anton     287:     xts = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+XT_OFFSET)+xt_offset);
1.1       anton     288:     for (i=0; i<DOESJUMP+1; i++)
1.38      anton     289:       xts[i] = symbols[i] = (Label)routines[i];
1.1       anton     290:     for (; routines[i]!=0; i++) {
                    291:       if (i>=MAX_SYMBOLS) {
1.60    ! anton     292:        fprintf(stderr,"gforth-ditc: more than %ld primitives\n",(long)MAX_SYMBOLS);
1.1       anton     293:        exit(1);
1.20      anton     294:       }
1.38      anton     295:       xts[i] = symbols[i] = &routines[i];
1.1       anton     296:     }
1.20      anton     297: #endif /* defined(DOUBLY_INDIRECT) */
                    298:     return symbols;
1.7       pazsan    299:   }
1.1       anton     300: 
1.24      anton     301:   IF_spTOS(spTOS = sp[0]);
                    302:   IF_fpTOS(fpTOS = fp[0]);
1.7       pazsan    303: /*  prep_terminal(); */
1.46      anton     304: #ifdef NO_IP
                    305:   goto *(*(Label *)ip0);
                    306: #else
1.11      anton     307:   SET_IP(ip);
1.28      anton     308:   SUPER_END; /* count the first block, too */
1.1       anton     309:   NEXT;
1.46      anton     310: #endif
1.11      anton     311: 
1.1       anton     312: #ifdef CPU_DEP3
                    313:   CPU_DEP3
                    314: #endif
                    315:   
                    316:  docol:
                    317:   {
1.46      anton     318: #ifdef NO_IP
                    319:     *--rp = next_code;
                    320:     goto **(Label *)PFA1(cfa);
                    321: #else
1.1       anton     322: #ifdef DEBUG
1.37      pazsan    323:     {
                    324:       CFA_TO_NAME(cfa);
                    325:       fprintf(stderr,"%08lx: col: %08lx %.*s\n",(Cell)ip,(Cell)PFA1(cfa),
                    326:              len,name);
                    327:     }
1.1       anton     328: #endif
                    329: #ifdef CISC_NEXT
                    330:     /* this is the simple version */
                    331:     *--rp = (Cell)ip;
1.11      anton     332:     SET_IP((Xt *)PFA1(cfa));
1.28      anton     333:     SUPER_END;
1.1       anton     334:     NEXT;
                    335: #else
1.11      anton     336:     /* this one is important, so we help the compiler optimizing */
1.1       anton     337:     {
                    338:       DEF_CA
1.11      anton     339:       rp[-1] = (Cell)ip;
                    340:       SET_IP((Xt *)PFA1(cfa));
1.28      anton     341:       SUPER_END;
1.11      anton     342:       NEXT_P1;
                    343:       rp--;
                    344:       NEXT_P2;
1.1       anton     345:     }
                    346: #endif
1.46      anton     347: #endif
1.1       anton     348:   }
                    349: 
                    350:  docon:
                    351:   {
                    352: #ifdef DEBUG
                    353:     fprintf(stderr,"%08lx: con: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));
                    354: #endif
                    355: #ifdef USE_TOS
1.24      anton     356:     *sp-- = spTOS;
                    357:     spTOS = *(Cell *)PFA1(cfa);
1.1       anton     358: #else
                    359:     *--sp = *(Cell *)PFA1(cfa);
                    360: #endif
                    361:   }
1.46      anton     362: #ifdef NO_IP
                    363:   goto *next_code;
                    364: #else
1.1       anton     365:   NEXT_P0;
                    366:   NEXT;
1.46      anton     367: #endif
1.1       anton     368:   
                    369:  dovar:
                    370:   {
                    371: #ifdef DEBUG
                    372:     fprintf(stderr,"%08lx: var: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
                    373: #endif
                    374: #ifdef USE_TOS
1.24      anton     375:     *sp-- = spTOS;
                    376:     spTOS = (Cell)PFA1(cfa);
1.1       anton     377: #else
                    378:     *--sp = (Cell)PFA1(cfa);
                    379: #endif
                    380:   }
1.46      anton     381: #ifdef NO_IP
                    382:   goto *next_code;
                    383: #else
1.1       anton     384:   NEXT_P0;
                    385:   NEXT;
1.46      anton     386: #endif
1.1       anton     387:   
                    388:  douser:
                    389:   {
                    390: #ifdef DEBUG
                    391:     fprintf(stderr,"%08lx: user: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
                    392: #endif
                    393: #ifdef USE_TOS
1.24      anton     394:     *sp-- = spTOS;
                    395:     spTOS = (Cell)(up+*(Cell*)PFA1(cfa));
1.1       anton     396: #else
                    397:     *--sp = (Cell)(up+*(Cell*)PFA1(cfa));
                    398: #endif
                    399:   }
1.46      anton     400: #ifdef NO_IP
                    401:   goto *next_code;
                    402: #else
1.1       anton     403:   NEXT_P0;
                    404:   NEXT;
1.46      anton     405: #endif
1.1       anton     406:   
                    407:  dodefer:
                    408:   {
                    409: #ifdef DEBUG
                    410:     fprintf(stderr,"%08lx: defer: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));
                    411: #endif
1.28      anton     412:     SUPER_END;
1.1       anton     413:     EXEC(*(Xt *)PFA1(cfa));
                    414:   }
                    415: 
                    416:  dofield:
                    417:   {
                    418: #ifdef DEBUG
                    419:     fprintf(stderr,"%08lx: field: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
                    420: #endif
1.24      anton     421:     spTOS += *(Cell*)PFA1(cfa);
1.1       anton     422:   }
1.46      anton     423: #ifdef NO_IP
                    424:   goto *next_code;
                    425: #else
1.1       anton     426:   NEXT_P0;
                    427:   NEXT;
1.46      anton     428: #endif
1.1       anton     429: 
                    430:  dodoes:
                    431:   /* this assumes the following structure:
                    432:      defining-word:
                    433:      
                    434:      ...
                    435:      DOES>
                    436:      (possible padding)
                    437:      possibly handler: jmp dodoes
                    438:      (possible branch delay slot(s))
                    439:      Forth code after DOES>
                    440:      
                    441:      defined word:
                    442:      
                    443:      cfa: address of or jump to handler OR
                    444:           address of or jump to dodoes, address of DOES-code
                    445:      pfa:
                    446:      
                    447:      */
1.46      anton     448: #ifdef NO_IP
                    449:   *--rp = next_code;
                    450:   IF_spTOS(spTOS = sp[0]);
                    451:   sp--;
                    452:   spTOS = (Cell)PFA(cfa);
                    453:   goto **(Label *)DOES_CODE1(cfa);
                    454: #else
1.1       anton     455:   {
                    456:     /*    fprintf(stderr, "Got CFA %08lx at doescode %08lx/%08lx: does: %08lx\n",cfa,(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa));*/
                    457: #ifdef DEBUG
                    458:     fprintf(stderr,"%08lx/%08lx: does: %08lx\n",(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa));
                    459:     fflush(stderr);
                    460: #endif
                    461:     *--rp = (Cell)ip;
                    462:     /* PFA1 might collide with DOES_CODE1 here, so we use PFA */
                    463: #ifdef USE_TOS
1.24      anton     464:     *sp-- = spTOS;
                    465:     spTOS = (Cell)PFA(cfa);
1.1       anton     466: #else
                    467:     *--sp = (Cell)PFA(cfa);
                    468: #endif
1.11      anton     469:     SET_IP(DOES_CODE1(cfa));
1.28      anton     470:     SUPER_END;
1.24      anton     471:     /*    fprintf(stderr,"TOS = %08lx, IP=%08lx\n", spTOS, IP);*/
1.1       anton     472:   }
                    473:   NEXT;
1.46      anton     474: #endif
1.1       anton     475: 
                    476: #include "prim.i"
1.34      anton     477:   after_last: return (Label *)0;
                    478:   /*needed only to get the length of the last primitive */
1.50      anton     479: }

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