Annotation of gforth/engine/engine.c, revision 1.88

1.1       anton       1: /* Gforth virtual machine (aka inner interpreter)
                      2: 
1.87      anton       3:   Copyright (C) 1995,1996,1997,1998,2000,2003,2004,2005 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: 
1.72      anton      22: #if defined(GFORTH_DEBUGGING) || defined(INDIRECT_THREADED) || defined(DOUBLY_INDIRECT) || defined(VM_PROFILING)
1.68      anton      23: #define USE_NO_TOS
1.72      anton      24: #else
                     25: #define USE_TOS
                     26: #endif
1.68      anton      27: #define USE_NO_FTOS
                     28: 
1.1       anton      29: #include "config.h"
1.31      pazsan     30: #include "forth.h"
1.1       anton      31: #include <ctype.h>
                     32: #include <stdio.h>
                     33: #include <string.h>
                     34: #include <math.h>
1.4       pazsan     35: #include <assert.h>
                     36: #include <stdlib.h>
                     37: #include <errno.h>
                     38: #include "io.h"
                     39: #include "threaded.h"
                     40: #ifndef STANDALONE
1.1       anton      41: #include <sys/types.h>
                     42: #include <sys/stat.h>
                     43: #include <fcntl.h>
                     44: #include <time.h>
                     45: #include <sys/time.h>
                     46: #include <unistd.h>
                     47: #include <pwd.h>
1.17      pazsan     48: #include <dirent.h>
1.21      anton      49: #include <sys/resource.h>
1.19      anton      50: #ifdef HAVE_FNMATCH_H
1.18      anton      51: #include <fnmatch.h>
1.19      anton      52: #else
                     53: #include "fnmatch.h"
                     54: #endif
1.4       pazsan     55: #else
                     56: #include "systypes.h"
                     57: #endif
1.1       anton      58: 
                     59: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN) /* what else? */
                     60: #include <dlfcn.h>
                     61: #endif
1.8       pazsan     62: #if defined(_WIN32)
                     63: #include <windows.h>
                     64: #endif
1.1       anton      65: #ifdef hpux
                     66: #include <dl.h>
                     67: #endif
                     68: 
1.63      pazsan     69: #ifdef HAS_FFCALL
                     70: #include <avcall.h>
                     71: #include <callback.h>
                     72: #endif
                     73: 
1.84      pazsan     74: #ifdef HAS_LIBFFI
                     75: #include <ffi.h>
                     76: #endif
                     77: 
1.1       anton      78: #ifndef SEEK_SET
                     79: /* should be defined in stdio.h, but some systems don't have it */
                     80: #define SEEK_SET 0
                     81: #endif
                     82: 
1.53      anton      83: #ifndef HAVE_FSEEKO
                     84: #define fseeko fseek
                     85: #endif
                     86: 
                     87: #ifndef HAVE_FTELLO
                     88: #define ftello ftell
                     89: #endif
                     90: 
1.1       anton      91: #define NULLC '\0'
                     92: 
1.14      pazsan     93: #ifdef MEMCMP_AS_SUBROUTINE
                     94: extern int gforth_memcmp(const char * s1, const char * s2, size_t n);
1.15      anton      95: #define memcmp(s1,s2,n) gforth_memcmp(s1,s2,n)
1.14      pazsan     96: #endif
                     97: 
1.1       anton      98: #define NEWLINE        '\n'
                     99: 
1.26      anton     100: /* conversion on fetch */
                    101: 
1.41      anton     102: #define vm_Cell2f(_cell,_x)            ((_x)=(Bool)(_cell))
                    103: #define vm_Cell2c(_cell,_x)            ((_x)=(Char)(_cell))
                    104: #define vm_Cell2n(_cell,_x)            ((_x)=(Cell)(_cell))
                    105: #define vm_Cell2w(_cell,_x)            ((_x)=(Cell)(_cell))
                    106: #define vm_Cell2u(_cell,_x)            ((_x)=(UCell)(_cell))
                    107: #define vm_Cell2a_(_cell,_x)           ((_x)=(Cell *)(_cell))
                    108: #define vm_Cell2c_(_cell,_x)           ((_x)=(Char *)(_cell))
                    109: #define vm_Cell2f_(_cell,_x)           ((_x)=(Float *)(_cell))
                    110: #define vm_Cell2df_(_cell,_x)          ((_x)=(DFloat *)(_cell))
                    111: #define vm_Cell2sf_(_cell,_x)          ((_x)=(SFloat *)(_cell))
                    112: #define vm_Cell2xt(_cell,_x)           ((_x)=(Xt)(_cell))
                    113: #define vm_Cell2f83name(_cell,_x)      ((_x)=(struct F83Name *)(_cell))
                    114: #define vm_Cell2longname(_cell,_x)     ((_x)=(struct Longname *)(_cell))
                    115: #define vm_Float2r(_float,_x)          (_x=_float)
1.26      anton     116: 
                    117: /* conversion on store */
                    118: 
1.41      anton     119: #define vm_f2Cell(_x,_cell)            ((_cell)=(Cell)(_x))
                    120: #define vm_c2Cell(_x,_cell)            ((_cell)=(Cell)(_x))
                    121: #define vm_n2Cell(_x,_cell)            ((_cell)=(Cell)(_x))
                    122: #define vm_w2Cell(_x,_cell)            ((_cell)=(Cell)(_x))
                    123: #define vm_u2Cell(_x,_cell)            ((_cell)=(Cell)(_x))
                    124: #define vm_a_2Cell(_x,_cell)           ((_cell)=(Cell)(_x))
                    125: #define vm_c_2Cell(_x,_cell)           ((_cell)=(Cell)(_x))
                    126: #define vm_f_2Cell(_x,_cell)           ((_cell)=(Cell)(_x))
                    127: #define vm_df_2Cell(_x,_cell)          ((_cell)=(Cell)(_x))
                    128: #define vm_sf_2Cell(_x,_cell)          ((_cell)=(Cell)(_x))
                    129: #define vm_xt2Cell(_x,_cell)           ((_cell)=(Cell)(_x))
                    130: #define vm_f83name2Cell(_x,_cell)      ((_cell)=(Cell)(_x))
                    131: #define vm_longname2Cell(_x,_cell)     ((_cell)=(Cell)(_x))
                    132: #define vm_r2Float(_x,_float)          (_float=_x)
1.26      anton     133: 
1.41      anton     134: #define vm_Cell2Cell(_x,_y)            (_y=_x)
1.29      anton     135: 
1.46      anton     136: #ifdef NO_IP
                    137: #define IMM_ARG(access,value)          (VARIANT(value))
                    138: #else
                    139: #define IMM_ARG(access,value)          (access)
                    140: #endif
                    141: 
1.1       anton     142: /* if machine.h has not defined explicit registers, define them as implicit */
                    143: #ifndef IPREG
                    144: #define IPREG
                    145: #endif
                    146: #ifndef SPREG
                    147: #define SPREG
                    148: #endif
                    149: #ifndef RPREG
                    150: #define RPREG
                    151: #endif
                    152: #ifndef FPREG
                    153: #define FPREG
                    154: #endif
                    155: #ifndef LPREG
                    156: #define LPREG
                    157: #endif
1.79      pazsan    158: #ifndef CAREG
                    159: #define CAREG
                    160: #endif
1.1       anton     161: #ifndef CFAREG
                    162: #define CFAREG
                    163: #endif
                    164: #ifndef UPREG
                    165: #define UPREG
                    166: #endif
                    167: #ifndef TOSREG
                    168: #define TOSREG
                    169: #endif
1.69      anton     170: #ifndef spbREG
                    171: #define spbREG
                    172: #endif
1.74      anton     173: #ifndef spcREG
                    174: #define spcREG
                    175: #endif
1.80      anton     176: #ifndef spdREG
                    177: #define spdREG
                    178: #endif
                    179: #ifndef speREG
                    180: #define speREG
                    181: #endif
1.81      anton     182: #ifndef spfREG
                    183: #define spfREG
                    184: #endif
                    185: #ifndef spgREG
                    186: #define spgREG
                    187: #endif
                    188: #ifndef sphREG
                    189: #define sphREG
                    190: #endif
1.1       anton     191: #ifndef FTOSREG
                    192: #define FTOSREG
                    193: #endif
                    194: 
                    195: #ifndef CPU_DEP1
                    196: # define CPU_DEP1 0
                    197: #endif
                    198: 
1.62      anton     199: /* instructions containing SUPER_END must be the last instruction of a
1.28      anton     200:    super-instruction (e.g., branches, EXECUTE, and other instructions
                    201:    ending the basic block). Instructions containing SET_IP get this
                    202:    automatically, so you usually don't have to write it.  If you have
                    203:    to write it, write it after IP points to the next instruction.
                    204:    Used for profiling.  Don't write it in a word containing SET_IP, or
                    205:    the following block will be counted twice. */
                    206: #ifdef VM_PROFILING
                    207: #define SUPER_END  vm_count_block(IP)
                    208: #else
                    209: #define SUPER_END
                    210: #endif
1.35      anton     211: #define SUPER_CONTINUE
1.46      anton     212: 
1.66      anton     213: #ifdef GFORTH_DEBUGGING
1.70      anton     214: #if DEBUG
1.73      pazsan    215: #define NAME(string) { saved_ip=ip; asm("# "string); fprintf(stderr,"%08lx depth=%3ld: "string"\n",(Cell)ip,sp0+3-sp);}
1.70      anton     216: #else /* !DEBUG */
1.66      anton     217: #define NAME(string) { saved_ip=ip; asm(""); }
                    218: /* the asm here is to avoid reordering of following stuff above the
                    219:    assignment; this is an old-style asm (no operands), and therefore
                    220:    is treated like "asm volatile ..."; i.e., it prevents most
                    221:    reorderings across itself.  We want the assignment above first,
                    222:    because the stack loads may already cause a stack underflow. */
1.70      anton     223: #endif /* !DEBUG */
1.66      anton     224: #elif DEBUG
1.72      anton     225: #       define  NAME(string)    {Cell __depth=sp0+3-sp; int i; fprintf(stderr,"%08lx depth=%3ld: "string,(Cell)ip,sp0+3-sp); for (i=__depth-1; i>0; i--) fprintf(stderr, " $%lx",sp[i]); fprintf(stderr, " $%lx\n",spTOS); }
1.66      anton     226: #else
1.73      pazsan    227: #      define  NAME(string) asm("# "string);
1.66      anton     228: #endif
                    229: 
1.37      pazsan    230: #ifdef DEBUG
                    231: #define CFA_TO_NAME(__cfa) \
                    232:       Cell len, i; \
                    233:       char * name = __cfa; \
                    234:       for(i=0; i<32; i+=sizeof(Cell)) { \
                    235:         len = ((Cell*)name)[-1]; \
                    236:         if(len < 0) { \
                    237:          len &= 0x1F; \
                    238:           if((len+sizeof(Cell)) > i) break; \
                    239:        } len = 0; \
                    240:        name -= sizeof(Cell); \
                    241:       }
                    242: #endif
1.30      anton     243: 
1.85      pazsan    244: #if defined(HAS_FFCALL) || defined(HAS_LIBFFI)
1.88    ! pazsan    245: #define SAVE_REGS IF_fpTOS(fp[0]=fpTOS); gforth_SP=sp; gforth_FP=fp; gforth_RP=rp; gforth_LP=lp;
        !           246: #define REST_REGS sp=gforth_SP; fp=gforth_FP; rp=gforth_RP; lp=gforth_LP; IF_fpTOS(fpTOS=fp[0]);
1.63      pazsan    247: #endif
                    248: 
1.50      anton     249: #if !defined(ENGINE)
                    250: /* normal engine */
                    251: #define VARIANT(v)     (v)
                    252: #define JUMP(target)   goto I_noop
1.82      anton     253: #define LABEL(name) H_##name: asm(""); I_##name:
1.50      anton     254: 
                    255: #elif ENGINE==2
                    256: /* variant with padding between VM instructions for finding out
                    257:    cross-inst jumps (for dynamic code) */
                    258: #define engine engine2
                    259: #define VARIANT(v)     (v)
                    260: #define JUMP(target)   goto I_noop
1.78      anton     261: #define LABEL(name) H_##name: SKIP16; I_##name:
1.50      anton     262: 
                    263: #elif ENGINE==3
                    264: /* variant with different immediate arguments for finding out
                    265:    immediate arguments (for native code) */
                    266: #define engine engine3
                    267: #define VARIANT(v)     ((v)^0xffffffff)
                    268: #define JUMP(target)   goto K_lit
1.83      anton     269: #define LABEL(name) H_##name: asm(""); I_##name:
1.50      anton     270: #else
                    271: #error illegal ENGINE value
                    272: #endif /* ENGINE */
                    273: 
1.67      anton     274: /* the asm(""); is there to get a stop compiled on Itanium */
                    275: #define LABEL2(name) K_##name: asm("");
1.77      anton     276: #define LABEL3(name) J_##name: asm("");
1.50      anton     277: 
                    278: Label *engine(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0)
1.1       anton     279: /* executes code at ip, if ip!=NULL
                    280:    returns array of machine code labels (for use in a loader), if ip==NULL
                    281: */
                    282: {
1.10      anton     283: #ifndef GFORTH_DEBUGGING
                    284:   register Cell *rp RPREG;
                    285: #endif
1.46      anton     286: #ifndef NO_IP
                    287:   register Xt *ip IPREG = ip0;
                    288: #endif
1.1       anton     289:   register Cell *sp SPREG = sp0;
                    290:   register Float *fp FPREG = fp0;
                    291:   register Address lp LPREG = lp0;
                    292:   register Xt cfa CFAREG;
1.79      pazsan    293:   register Label real_ca CAREG;
1.11      anton     294: #ifdef MORE_VARS
                    295:   MORE_VARS
1.63      pazsan    296: #endif
                    297: #ifdef HAS_FFCALL
                    298:   av_alist alist;
                    299:   extern va_alist clist;
                    300:   float frv;
                    301:   int irv;
                    302:   double drv;
                    303:   long long llrv;
                    304:   void * prv;
1.84      pazsan    305: #endif
                    306: #ifdef HAS_LIBFFI
                    307:   extern void * ritem;
                    308:   extern void ** clist;
                    309:   extern void ffi_callback(ffi_cif * cif, void * resp, void ** args, Xt * ip);
1.11      anton     310: #endif
1.88    ! pazsan    311:   register Address up UPREG = gforth_UP;
1.80      anton     312:   register Cell MAYBE_UNUSED spTOS TOSREG;
1.74      anton     313:   register Cell MAYBE_UNUSED spb spbREG;
                    314:   register Cell MAYBE_UNUSED spc spcREG;
1.80      anton     315:   register Cell MAYBE_UNUSED spd spdREG;
                    316:   register Cell MAYBE_UNUSED spe speREG;
1.81      anton     317:   register Cell MAYBE_UNUSED spf speREG;
                    318:   register Cell MAYBE_UNUSED spg speREG;
                    319:   register Cell MAYBE_UNUSED sph speREG;
1.24      anton     320:   IF_fpTOS(register Float fpTOS FTOSREG;)
1.1       anton     321: #if defined(DOUBLY_INDIRECT)
                    322:   static Label *symbols;
                    323:   static void *routines[]= {
1.27      anton     324: #define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0]))
1.1       anton     325: #else /* !defined(DOUBLY_INDIRECT) */
                    326:   static Label symbols[]= {
1.27      anton     327: #define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0]))
1.1       anton     328: #endif /* !defined(DOUBLY_INDIRECT) */
1.55      anton     329: #define INST_ADDR(name) ((Label)&&I_##name)
1.71      anton     330: #include PRIM_LAB_I
1.34      anton     331: #undef INST_ADDR
                    332:     (Label)0,
1.55      anton     333: #define INST_ADDR(name) ((Label)&&K_##name)
1.71      anton     334: #include PRIM_LAB_I
1.46      anton     335: #undef INST_ADDR
1.55      anton     336: #define INST_ADDR(name) ((Label)&&J_##name)
1.71      anton     337: #include PRIM_LAB_I
1.34      anton     338: #undef INST_ADDR
1.76      anton     339:     (Label)&&after_last,
                    340:     (Label)&&before_goto,
1.78      anton     341:     (Label)&&after_goto,
                    342: /* just mention the H_ labels, so the SKIP16s are not optimized away */
                    343: #define INST_ADDR(name) ((Label)&&H_##name)
                    344: #include PRIM_LAB_I
                    345: #undef INST_ADDR
1.1       anton     346:   };
                    347: #ifdef CPU_DEP2
                    348:   CPU_DEP2
                    349: #endif
                    350: 
1.10      anton     351:   rp = rp0;
1.1       anton     352: #ifdef DEBUG
                    353:   fprintf(stderr,"ip=%x, sp=%x, rp=%x, fp=%x, lp=%x, up=%x\n",
1.46      anton     354:           (unsigned)ip0,(unsigned)sp,(unsigned)rp,
1.1       anton     355:          (unsigned)fp,(unsigned)lp,(unsigned)up);
                    356: #endif
                    357: 
1.46      anton     358:   if (ip0 == NULL) {
1.1       anton     359: #if defined(DOUBLY_INDIRECT)
1.38      anton     360: #define CODE_OFFSET (26*sizeof(Cell))
                    361: #define XT_OFFSET (22*sizeof(Cell))
1.1       anton     362:     int i;
1.3       anton     363:     Cell code_offset = offset_image? CODE_OFFSET : 0;
1.38      anton     364:     Cell xt_offset = offset_image? XT_OFFSET : 0;
1.7       pazsan    365: 
1.3       anton     366:     symbols = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+CODE_OFFSET)+code_offset);
1.38      anton     367:     xts = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+XT_OFFSET)+xt_offset);
1.1       anton     368:     for (i=0; i<DOESJUMP+1; i++)
1.38      anton     369:       xts[i] = symbols[i] = (Label)routines[i];
1.1       anton     370:     for (; routines[i]!=0; i++) {
                    371:       if (i>=MAX_SYMBOLS) {
1.60      anton     372:        fprintf(stderr,"gforth-ditc: more than %ld primitives\n",(long)MAX_SYMBOLS);
1.1       anton     373:        exit(1);
1.20      anton     374:       }
1.38      anton     375:       xts[i] = symbols[i] = &routines[i];
1.1       anton     376:     }
1.20      anton     377: #endif /* defined(DOUBLY_INDIRECT) */
                    378:     return symbols;
1.7       pazsan    379:   }
1.1       anton     380: 
1.81      anton     381: #if !(defined(GFORTH_DEBUGGING) || defined(INDIRECT_THREADED) || defined(DOUBLY_INDIRECT) || defined(VM_PROFILING))
1.80      anton     382:   sp += STACK_CACHE_DEFAULT-1;
1.81      anton     383:   /* some of those registers are dead, but its simpler to initialize them all */  spTOS = sp[0];
1.80      anton     384:   spb = sp[-1];
                    385:   spc = sp[-2];
                    386:   spd = sp[-3];
                    387:   spe = sp[-4];
1.81      anton     388:   spf = sp[-5];
                    389:   spg = sp[-6];
                    390:   sph = sp[-7];
1.80      anton     391: #endif
                    392: 
1.24      anton     393:   IF_fpTOS(fpTOS = fp[0]);
1.7       pazsan    394: /*  prep_terminal(); */
1.46      anton     395: #ifdef NO_IP
                    396:   goto *(*(Label *)ip0);
1.79      pazsan    397:   before_goto:
                    398:   goto *real_ca;
                    399:   after_goto:;
1.46      anton     400: #else
1.11      anton     401:   SET_IP(ip);
1.28      anton     402:   SUPER_END; /* count the first block, too */
1.79      pazsan    403:   FIRST_NEXT;
1.46      anton     404: #endif
1.11      anton     405: 
1.1       anton     406: #ifdef CPU_DEP3
                    407:   CPU_DEP3
1.46      anton     408: #endif
1.76      anton     409: 
1.78      anton     410: #include PRIM_I
                    411:   after_last: return (Label *)0;
                    412:   /*needed only to get the length of the last primitive */
                    413: 
                    414:   return (Label *)0;
1.50      anton     415: }

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