Annotation of gforth/engine/engine.c, revision 1.63
1.1 anton 1: /* Gforth virtual machine (aka inner interpreter)
2:
1.61 anton 3: Copyright (C) 1995,1996,1997,1998,2000,2003 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:
1.63 ! pazsan 62: #ifdef HAS_FFCALL
! 63: #include <avcall.h>
! 64: #include <callback.h>
! 65: #endif
! 66:
1.1 anton 67: #ifndef SEEK_SET
68: /* should be defined in stdio.h, but some systems don't have it */
69: #define SEEK_SET 0
70: #endif
71:
1.53 anton 72: #ifndef HAVE_FSEEKO
73: #define fseeko fseek
74: #endif
75:
76: #ifndef HAVE_FTELLO
77: #define ftello ftell
78: #endif
79:
1.1 anton 80: #define NULLC '\0'
81:
1.14 pazsan 82: #ifdef MEMCMP_AS_SUBROUTINE
83: extern int gforth_memcmp(const char * s1, const char * s2, size_t n);
1.15 anton 84: #define memcmp(s1,s2,n) gforth_memcmp(s1,s2,n)
1.14 pazsan 85: #endif
86:
1.1 anton 87: #define NEWLINE '\n'
88:
1.26 anton 89: /* conversion on fetch */
90:
1.41 anton 91: #define vm_Cell2f(_cell,_x) ((_x)=(Bool)(_cell))
92: #define vm_Cell2c(_cell,_x) ((_x)=(Char)(_cell))
93: #define vm_Cell2n(_cell,_x) ((_x)=(Cell)(_cell))
94: #define vm_Cell2w(_cell,_x) ((_x)=(Cell)(_cell))
95: #define vm_Cell2u(_cell,_x) ((_x)=(UCell)(_cell))
96: #define vm_Cell2a_(_cell,_x) ((_x)=(Cell *)(_cell))
97: #define vm_Cell2c_(_cell,_x) ((_x)=(Char *)(_cell))
98: #define vm_Cell2f_(_cell,_x) ((_x)=(Float *)(_cell))
99: #define vm_Cell2df_(_cell,_x) ((_x)=(DFloat *)(_cell))
100: #define vm_Cell2sf_(_cell,_x) ((_x)=(SFloat *)(_cell))
101: #define vm_Cell2xt(_cell,_x) ((_x)=(Xt)(_cell))
102: #define vm_Cell2f83name(_cell,_x) ((_x)=(struct F83Name *)(_cell))
103: #define vm_Cell2longname(_cell,_x) ((_x)=(struct Longname *)(_cell))
104: #define vm_Float2r(_float,_x) (_x=_float)
1.26 anton 105:
106: /* conversion on store */
107:
1.41 anton 108: #define vm_f2Cell(_x,_cell) ((_cell)=(Cell)(_x))
109: #define vm_c2Cell(_x,_cell) ((_cell)=(Cell)(_x))
110: #define vm_n2Cell(_x,_cell) ((_cell)=(Cell)(_x))
111: #define vm_w2Cell(_x,_cell) ((_cell)=(Cell)(_x))
112: #define vm_u2Cell(_x,_cell) ((_cell)=(Cell)(_x))
113: #define vm_a_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
114: #define vm_c_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
115: #define vm_f_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
116: #define vm_df_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
117: #define vm_sf_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
118: #define vm_xt2Cell(_x,_cell) ((_cell)=(Cell)(_x))
119: #define vm_f83name2Cell(_x,_cell) ((_cell)=(Cell)(_x))
120: #define vm_longname2Cell(_x,_cell) ((_cell)=(Cell)(_x))
121: #define vm_r2Float(_x,_float) (_float=_x)
1.26 anton 122:
1.41 anton 123: #define vm_Cell2Cell(_x,_y) (_y=_x)
1.29 anton 124:
1.46 anton 125: #ifdef NO_IP
126: #define IMM_ARG(access,value) (VARIANT(value))
127: #else
128: #define IMM_ARG(access,value) (access)
129: #endif
130:
1.1 anton 131: /* if machine.h has not defined explicit registers, define them as implicit */
132: #ifndef IPREG
133: #define IPREG
134: #endif
135: #ifndef SPREG
136: #define SPREG
137: #endif
138: #ifndef RPREG
139: #define RPREG
140: #endif
141: #ifndef FPREG
142: #define FPREG
143: #endif
144: #ifndef LPREG
145: #define LPREG
146: #endif
147: #ifndef CFAREG
148: #define CFAREG
149: #endif
150: #ifndef UPREG
151: #define UPREG
152: #endif
153: #ifndef TOSREG
154: #define TOSREG
155: #endif
156: #ifndef FTOSREG
157: #define FTOSREG
158: #endif
159:
160: #ifndef CPU_DEP1
161: # define CPU_DEP1 0
162: #endif
163:
1.62 anton 164: /* instructions containing SUPER_END must be the last instruction of a
1.28 anton 165: super-instruction (e.g., branches, EXECUTE, and other instructions
166: ending the basic block). Instructions containing SET_IP get this
167: automatically, so you usually don't have to write it. If you have
168: to write it, write it after IP points to the next instruction.
169: Used for profiling. Don't write it in a word containing SET_IP, or
170: the following block will be counted twice. */
171: #ifdef VM_PROFILING
172: #define SUPER_END vm_count_block(IP)
173: #else
174: #define SUPER_END
175: #endif
1.35 anton 176: #define SUPER_CONTINUE
1.46 anton 177:
1.37 pazsan 178: #ifdef DEBUG
179: #define CFA_TO_NAME(__cfa) \
180: Cell len, i; \
181: char * name = __cfa; \
182: for(i=0; i<32; i+=sizeof(Cell)) { \
183: len = ((Cell*)name)[-1]; \
184: if(len < 0) { \
185: len &= 0x1F; \
186: if((len+sizeof(Cell)) > i) break; \
187: } len = 0; \
188: name -= sizeof(Cell); \
189: }
190: #endif
1.30 anton 191:
1.63 ! pazsan 192: #ifdef HAS_FFCALL
! 193: #define SAVE_REGS IF_spTOS(sp[0]=spTOS); IF_fpTOS(fp[0]=fpTOS); SP=sp; FP=fp; RP=rp; LP=lp;
! 194: #define REST_REGS sp=SP; fp=FP; rp=RP; lp=LP; IF_spTOS(spTOS=sp[0]); IF_fpTOS(fpTOS=fp[0]);
! 195: #endif
! 196:
1.50 anton 197: #if !defined(ENGINE)
198: /* normal engine */
199: #define VARIANT(v) (v)
200: #define JUMP(target) goto I_noop
1.51 anton 201: #define LABEL(name) J_##name: asm(""); I_##name:
1.50 anton 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
1.52 anton 209: #define LABEL(name) J_##name: SKIP16; I_##name:
1.50 anton 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
1.51 anton 218: #define LABEL(name) J_##name: asm(""); I_##name:
1.50 anton 219: #else
220: #error illegal ENGINE value
221: #endif /* ENGINE */
222:
223: #define LABEL2(name) K_##name:
224:
225: Label *engine(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0)
1.1 anton 226: /* executes code at ip, if ip!=NULL
227: returns array of machine code labels (for use in a loader), if ip==NULL
228: */
229: {
1.10 anton 230: #ifndef GFORTH_DEBUGGING
231: register Cell *rp RPREG;
232: #endif
1.46 anton 233: #ifndef NO_IP
234: register Xt *ip IPREG = ip0;
235: #endif
1.1 anton 236: register Cell *sp SPREG = sp0;
237: register Float *fp FPREG = fp0;
238: register Address lp LPREG = lp0;
239: register Xt cfa CFAREG;
1.11 anton 240: #ifdef MORE_VARS
241: MORE_VARS
1.63 ! pazsan 242: #endif
! 243: #ifdef HAS_FFCALL
! 244: av_alist alist;
! 245: extern va_alist clist;
! 246: float frv;
! 247: int irv;
! 248: double drv;
! 249: long long llrv;
! 250: void * prv;
1.11 anton 251: #endif
1.1 anton 252: register Address up UPREG = UP;
1.24 anton 253: IF_spTOS(register Cell spTOS TOSREG;)
254: IF_fpTOS(register Float fpTOS FTOSREG;)
1.1 anton 255: #if defined(DOUBLY_INDIRECT)
256: static Label *symbols;
257: static void *routines[]= {
1.27 anton 258: #define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0]))
1.1 anton 259: #else /* !defined(DOUBLY_INDIRECT) */
260: static Label symbols[]= {
1.27 anton 261: #define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0]))
1.1 anton 262: #endif /* !defined(DOUBLY_INDIRECT) */
1.4 pazsan 263: (Label)&&docol,
264: (Label)&&docon,
265: (Label)&&dovar,
266: (Label)&&douser,
267: (Label)&&dodefer,
268: (Label)&&dofield,
269: (Label)&&dodoes,
1.1 anton 270: /* the following entry is normally unused;
1.34 anton 271: it is there because its index indicates a does-handler */
1.7 pazsan 272: CPU_DEP1,
1.55 anton 273: #define INST_ADDR(name) ((Label)&&I_##name)
1.34 anton 274: #include "prim_lab.i"
275: #undef INST_ADDR
276: (Label)&&after_last,
277: (Label)0,
1.55 anton 278: #define INST_ADDR(name) ((Label)&&K_##name)
1.46 anton 279: #include "prim_lab.i"
280: #undef INST_ADDR
1.55 anton 281: #define INST_ADDR(name) ((Label)&&J_##name)
1.1 anton 282: #include "prim_lab.i"
1.34 anton 283: #undef INST_ADDR
1.1 anton 284: };
285: #ifdef CPU_DEP2
286: CPU_DEP2
287: #endif
288:
1.10 anton 289: rp = rp0;
1.1 anton 290: #ifdef DEBUG
291: fprintf(stderr,"ip=%x, sp=%x, rp=%x, fp=%x, lp=%x, up=%x\n",
1.46 anton 292: (unsigned)ip0,(unsigned)sp,(unsigned)rp,
1.1 anton 293: (unsigned)fp,(unsigned)lp,(unsigned)up);
294: #endif
295:
1.46 anton 296: if (ip0 == NULL) {
1.1 anton 297: #if defined(DOUBLY_INDIRECT)
1.38 anton 298: #define CODE_OFFSET (26*sizeof(Cell))
299: #define XT_OFFSET (22*sizeof(Cell))
1.1 anton 300: int i;
1.3 anton 301: Cell code_offset = offset_image? CODE_OFFSET : 0;
1.38 anton 302: Cell xt_offset = offset_image? XT_OFFSET : 0;
1.7 pazsan 303:
1.3 anton 304: symbols = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+CODE_OFFSET)+code_offset);
1.38 anton 305: xts = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+XT_OFFSET)+xt_offset);
1.1 anton 306: for (i=0; i<DOESJUMP+1; i++)
1.38 anton 307: xts[i] = symbols[i] = (Label)routines[i];
1.1 anton 308: for (; routines[i]!=0; i++) {
309: if (i>=MAX_SYMBOLS) {
1.60 anton 310: fprintf(stderr,"gforth-ditc: more than %ld primitives\n",(long)MAX_SYMBOLS);
1.1 anton 311: exit(1);
1.20 anton 312: }
1.38 anton 313: xts[i] = symbols[i] = &routines[i];
1.1 anton 314: }
1.20 anton 315: #endif /* defined(DOUBLY_INDIRECT) */
316: return symbols;
1.7 pazsan 317: }
1.1 anton 318:
1.24 anton 319: IF_spTOS(spTOS = sp[0]);
320: IF_fpTOS(fpTOS = fp[0]);
1.7 pazsan 321: /* prep_terminal(); */
1.46 anton 322: #ifdef NO_IP
323: goto *(*(Label *)ip0);
324: #else
1.11 anton 325: SET_IP(ip);
1.28 anton 326: SUPER_END; /* count the first block, too */
1.1 anton 327: NEXT;
1.46 anton 328: #endif
1.11 anton 329:
1.1 anton 330: #ifdef CPU_DEP3
331: CPU_DEP3
332: #endif
333:
334: docol:
335: {
1.46 anton 336: #ifdef NO_IP
337: *--rp = next_code;
338: goto **(Label *)PFA1(cfa);
339: #else
1.1 anton 340: #ifdef DEBUG
1.37 pazsan 341: {
342: CFA_TO_NAME(cfa);
343: fprintf(stderr,"%08lx: col: %08lx %.*s\n",(Cell)ip,(Cell)PFA1(cfa),
344: len,name);
345: }
1.1 anton 346: #endif
347: #ifdef CISC_NEXT
348: /* this is the simple version */
349: *--rp = (Cell)ip;
1.11 anton 350: SET_IP((Xt *)PFA1(cfa));
1.28 anton 351: SUPER_END;
1.1 anton 352: NEXT;
353: #else
1.11 anton 354: /* this one is important, so we help the compiler optimizing */
1.1 anton 355: {
356: DEF_CA
1.11 anton 357: rp[-1] = (Cell)ip;
358: SET_IP((Xt *)PFA1(cfa));
1.28 anton 359: SUPER_END;
1.11 anton 360: NEXT_P1;
361: rp--;
362: NEXT_P2;
1.1 anton 363: }
364: #endif
1.46 anton 365: #endif
1.1 anton 366: }
367:
368: docon:
369: {
370: #ifdef DEBUG
371: fprintf(stderr,"%08lx: con: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));
372: #endif
373: #ifdef USE_TOS
1.24 anton 374: *sp-- = spTOS;
375: spTOS = *(Cell *)PFA1(cfa);
1.1 anton 376: #else
377: *--sp = *(Cell *)PFA1(cfa);
378: #endif
379: }
1.46 anton 380: #ifdef NO_IP
381: goto *next_code;
382: #else
1.1 anton 383: NEXT_P0;
384: NEXT;
1.46 anton 385: #endif
1.1 anton 386:
387: dovar:
388: {
389: #ifdef DEBUG
390: fprintf(stderr,"%08lx: var: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
391: #endif
392: #ifdef USE_TOS
1.24 anton 393: *sp-- = spTOS;
394: spTOS = (Cell)PFA1(cfa);
1.1 anton 395: #else
396: *--sp = (Cell)PFA1(cfa);
397: #endif
398: }
1.46 anton 399: #ifdef NO_IP
400: goto *next_code;
401: #else
1.1 anton 402: NEXT_P0;
403: NEXT;
1.46 anton 404: #endif
1.1 anton 405:
406: douser:
407: {
408: #ifdef DEBUG
409: fprintf(stderr,"%08lx: user: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
410: #endif
411: #ifdef USE_TOS
1.24 anton 412: *sp-- = spTOS;
413: spTOS = (Cell)(up+*(Cell*)PFA1(cfa));
1.1 anton 414: #else
415: *--sp = (Cell)(up+*(Cell*)PFA1(cfa));
416: #endif
417: }
1.46 anton 418: #ifdef NO_IP
419: goto *next_code;
420: #else
1.1 anton 421: NEXT_P0;
422: NEXT;
1.46 anton 423: #endif
1.1 anton 424:
425: dodefer:
426: {
427: #ifdef DEBUG
428: fprintf(stderr,"%08lx: defer: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));
429: #endif
1.28 anton 430: SUPER_END;
1.1 anton 431: EXEC(*(Xt *)PFA1(cfa));
432: }
433:
434: dofield:
435: {
436: #ifdef DEBUG
437: fprintf(stderr,"%08lx: field: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
438: #endif
1.24 anton 439: spTOS += *(Cell*)PFA1(cfa);
1.1 anton 440: }
1.46 anton 441: #ifdef NO_IP
442: goto *next_code;
443: #else
1.1 anton 444: NEXT_P0;
445: NEXT;
1.46 anton 446: #endif
1.1 anton 447:
448: dodoes:
449: /* this assumes the following structure:
450: defining-word:
451:
452: ...
453: DOES>
454: (possible padding)
455: possibly handler: jmp dodoes
456: (possible branch delay slot(s))
457: Forth code after DOES>
458:
459: defined word:
460:
461: cfa: address of or jump to handler OR
462: address of or jump to dodoes, address of DOES-code
463: pfa:
464:
465: */
1.46 anton 466: #ifdef NO_IP
467: *--rp = next_code;
468: IF_spTOS(spTOS = sp[0]);
469: sp--;
470: spTOS = (Cell)PFA(cfa);
471: goto **(Label *)DOES_CODE1(cfa);
472: #else
1.1 anton 473: {
474: /* fprintf(stderr, "Got CFA %08lx at doescode %08lx/%08lx: does: %08lx\n",cfa,(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa));*/
475: #ifdef DEBUG
476: fprintf(stderr,"%08lx/%08lx: does: %08lx\n",(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa));
477: fflush(stderr);
478: #endif
479: *--rp = (Cell)ip;
480: /* PFA1 might collide with DOES_CODE1 here, so we use PFA */
481: #ifdef USE_TOS
1.24 anton 482: *sp-- = spTOS;
483: spTOS = (Cell)PFA(cfa);
1.1 anton 484: #else
485: *--sp = (Cell)PFA(cfa);
486: #endif
1.11 anton 487: SET_IP(DOES_CODE1(cfa));
1.28 anton 488: SUPER_END;
1.24 anton 489: /* fprintf(stderr,"TOS = %08lx, IP=%08lx\n", spTOS, IP);*/
1.1 anton 490: }
491: NEXT;
1.46 anton 492: #endif
1.1 anton 493:
494: #include "prim.i"
1.34 anton 495: after_last: return (Label *)0;
496: /*needed only to get the length of the last primitive */
1.50 anton 497: }
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>