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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