1: /* Gforth virtual machine (aka inner interpreter)
2:
3: Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc.
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
19: Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
20: */
21:
22: undefine(`symbols')
23:
24: #include "config.h"
25: #include "forth.h"
26: #include <ctype.h>
27: #include <stdio.h>
28: #include <string.h>
29: #include <math.h>
30: #include <assert.h>
31: #include <stdlib.h>
32: #include <errno.h>
33: #include "io.h"
34: #include "threaded.h"
35: #ifndef STANDALONE
36: #include <sys/types.h>
37: #include <sys/stat.h>
38: #include <fcntl.h>
39: #include <time.h>
40: #include <sys/time.h>
41: #include <unistd.h>
42: #include <pwd.h>
43: #include <dirent.h>
44: #include <sys/resource.h>
45: #ifdef HAVE_FNMATCH_H
46: #include <fnmatch.h>
47: #else
48: #include "fnmatch.h"
49: #endif
50: #else
51: #include "systypes.h"
52: #endif
53:
54: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN) /* what else? */
55: #include <dlfcn.h>
56: #endif
57: #if defined(_WIN32)
58: #include <windows.h>
59: #endif
60: #ifdef hpux
61: #include <dl.h>
62: #endif
63:
64: #ifndef SEEK_SET
65: /* should be defined in stdio.h, but some systems don't have it */
66: #define SEEK_SET 0
67: #endif
68:
69: #define IOR(flag) ((flag)? -512-errno : 0)
70:
71: struct F83Name {
72: struct F83Name *next; /* the link field for old hands */
73: char countetc;
74: char name[0];
75: };
76:
77: #define F83NAME_COUNT(np) ((np)->countetc & 0x1f)
78:
79: struct Longname {
80: struct Longname *next; /* the link field for old hands */
81: Cell countetc;
82: char name[0];
83: };
84:
85: #define LONGNAME_COUNT(np) ((np)->countetc & (((~((UCell)0))<<3)>>3))
86:
87: #define NULLC '\0'
88:
89: #ifdef MEMCMP_AS_SUBROUTINE
90: extern int gforth_memcmp(const char * s1, const char * s2, size_t n);
91: #define memcmp(s1,s2,n) gforth_memcmp(s1,s2,n)
92: #endif
93:
94: #define NEWLINE '\n'
95:
96: /* conversion on fetch */
97:
98: #define vm_Cell2f(_cell,_x) ((_x)=(Bool)(_cell))
99: #define vm_Cell2c(_cell,_x) ((_x)=(Char)(_cell))
100: #define vm_Cell2n(_cell,_x) ((_x)=(Cell)(_cell))
101: #define vm_Cell2w(_cell,_x) ((_x)=(Cell)(_cell))
102: #define vm_Cell2u(_cell,_x) ((_x)=(UCell)(_cell))
103: #define vm_Cell2a_(_cell,_x) ((_x)=(Cell *)(_cell))
104: #define vm_Cell2c_(_cell,_x) ((_x)=(Char *)(_cell))
105: #define vm_Cell2f_(_cell,_x) ((_x)=(Float *)(_cell))
106: #define vm_Cell2df_(_cell,_x) ((_x)=(DFloat *)(_cell))
107: #define vm_Cell2sf_(_cell,_x) ((_x)=(SFloat *)(_cell))
108: #define vm_Cell2xt(_cell,_x) ((_x)=(Xt)(_cell))
109: #define vm_Cell2f83name(_cell,_x) ((_x)=(struct F83Name *)(_cell))
110: #define vm_Cell2longname(_cell,_x) ((_x)=(struct Longname *)(_cell))
111: #define vm_Float2r(_float,_x) (_x=_float)
112:
113: /* conversion on store */
114:
115: #define vm_f2Cell(_x,_cell) ((_cell)=(Cell)(_x))
116: #define vm_c2Cell(_x,_cell) ((_cell)=(Cell)(_x))
117: #define vm_n2Cell(_x,_cell) ((_cell)=(Cell)(_x))
118: #define vm_w2Cell(_x,_cell) ((_cell)=(Cell)(_x))
119: #define vm_u2Cell(_x,_cell) ((_cell)=(Cell)(_x))
120: #define vm_a_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
121: #define vm_c_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
122: #define vm_f_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
123: #define vm_df_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
124: #define vm_sf_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
125: #define vm_xt2Cell(_x,_cell) ((_cell)=(Cell)(_x))
126: #define vm_f83name2Cell(_x,_cell) ((_cell)=(Cell)(_x))
127: #define vm_longname2Cell(_x,_cell) ((_cell)=(Cell)(_x))
128: #define vm_r2Float(_x,_float) (_float=_x)
129:
130: #define vm_Cell2Cell(_x,_y) (_y=_x)
131:
132: #ifdef NO_IP
133: #define IMM_ARG(access,value) (VARIANT(value))
134: #else
135: #define IMM_ARG(access,value) (access)
136: #endif
137:
138: /* if machine.h has not defined explicit registers, define them as implicit */
139: #ifndef IPREG
140: #define IPREG
141: #endif
142: #ifndef SPREG
143: #define SPREG
144: #endif
145: #ifndef RPREG
146: #define RPREG
147: #endif
148: #ifndef FPREG
149: #define FPREG
150: #endif
151: #ifndef LPREG
152: #define LPREG
153: #endif
154: #ifndef CFAREG
155: #define CFAREG
156: #endif
157: #ifndef UPREG
158: #define UPREG
159: #endif
160: #ifndef TOSREG
161: #define TOSREG
162: #endif
163: #ifndef FTOSREG
164: #define FTOSREG
165: #endif
166:
167: #ifndef CPU_DEP1
168: # define CPU_DEP1 0
169: #endif
170:
171: /* instructions containing these must be the last instruction of a
172: super-instruction (e.g., branches, EXECUTE, and other instructions
173: ending the basic block). Instructions containing SET_IP get this
174: automatically, so you usually don't have to write it. If you have
175: to write it, write it after IP points to the next instruction.
176: Used for profiling. Don't write it in a word containing SET_IP, or
177: the following block will be counted twice. */
178: #ifdef VM_PROFILING
179: #define SUPER_END vm_count_block(IP)
180: #else
181: #define SUPER_END
182: #endif
183: #define SUPER_CONTINUE
184:
185: #ifdef DEBUG
186: #define CFA_TO_NAME(__cfa) \
187: Cell len, i; \
188: char * name = __cfa; \
189: for(i=0; i<32; i+=sizeof(Cell)) { \
190: len = ((Cell*)name)[-1]; \
191: if(len < 0) { \
192: len &= 0x1F; \
193: if((len+sizeof(Cell)) > i) break; \
194: } len = 0; \
195: name -= sizeof(Cell); \
196: }
197: #endif
198:
199: define(enginerest,
200: `(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0)
201: /* executes code at ip, if ip!=NULL
202: returns array of machine code labels (for use in a loader), if ip==NULL
203: */
204: {
205: #ifndef GFORTH_DEBUGGING
206: register Cell *rp RPREG;
207: #endif
208: #ifndef NO_IP
209: register Xt *ip IPREG = ip0;
210: #endif
211: register Cell *sp SPREG = sp0;
212: register Float *fp FPREG = fp0;
213: register Address lp LPREG = lp0;
214: register Xt cfa CFAREG;
215: #ifdef MORE_VARS
216: MORE_VARS
217: #endif
218: register Address up UPREG = UP;
219: IF_spTOS(register Cell spTOS TOSREG;)
220: IF_fpTOS(register Float fpTOS FTOSREG;)
221: #if defined(DOUBLY_INDIRECT)
222: static Label *symbols;
223: static void *routines[]= {
224: #define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0]))
225: #else /* !defined(DOUBLY_INDIRECT) */
226: static Label symbols[]= {
227: #define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0]))
228: #endif /* !defined(DOUBLY_INDIRECT) */
229: (Label)&&docol,
230: (Label)&&docon,
231: (Label)&&dovar,
232: (Label)&&douser,
233: (Label)&&dodefer,
234: (Label)&&dofield,
235: (Label)&&dodoes,
236: /* the following entry is normally unused;
237: it is there because its index indicates a does-handler */
238: CPU_DEP1,
239: #define INST_ADDR(name) (Label)&&I_##name
240: #include "prim_lab.i"
241: #undef INST_ADDR
242: (Label)&&after_last,
243: (Label)0,
244: #define INST_ADDR(name) (Label)&&K_##name
245: #include "prim_lab.i"
246: #undef INST_ADDR
247: #ifdef IN_ENGINE2
248: #define INST_ADDR(name) (Label)&&J_##name
249: #include "prim_lab.i"
250: #undef INST_ADDR
251: #endif
252: };
253: #ifdef CPU_DEP2
254: CPU_DEP2
255: #endif
256:
257: rp = rp0;
258: #ifdef DEBUG
259: fprintf(stderr,"ip=%x, sp=%x, rp=%x, fp=%x, lp=%x, up=%x\n",
260: (unsigned)ip0,(unsigned)sp,(unsigned)rp,
261: (unsigned)fp,(unsigned)lp,(unsigned)up);
262: #endif
263:
264: if (ip0 == NULL) {
265: #if defined(DOUBLY_INDIRECT)
266: #define CODE_OFFSET (26*sizeof(Cell))
267: #define XT_OFFSET (22*sizeof(Cell))
268: int i;
269: Cell code_offset = offset_image? CODE_OFFSET : 0;
270: Cell xt_offset = offset_image? XT_OFFSET : 0;
271:
272: symbols = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+CODE_OFFSET)+code_offset);
273: xts = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+XT_OFFSET)+xt_offset);
274: for (i=0; i<DOESJUMP+1; i++)
275: xts[i] = symbols[i] = (Label)routines[i];
276: for (; routines[i]!=0; i++) {
277: if (i>=MAX_SYMBOLS) {
278: fprintf(stderr,"gforth-ditc: more than %d primitives\n",MAX_SYMBOLS);
279: exit(1);
280: }
281: xts[i] = symbols[i] = &routines[i];
282: }
283: #endif /* defined(DOUBLY_INDIRECT) */
284: return symbols;
285: }
286:
287: IF_spTOS(spTOS = sp[0]);
288: IF_fpTOS(fpTOS = fp[0]);
289: /* prep_terminal(); */
290: #ifdef NO_IP
291: goto *(*(Label *)ip0);
292: #else
293: SET_IP(ip);
294: SUPER_END; /* count the first block, too */
295: NEXT;
296: #endif
297:
298: #ifdef CPU_DEP3
299: CPU_DEP3
300: #endif
301:
302: docol:
303: {
304: #ifdef NO_IP
305: *--rp = next_code;
306: goto **(Label *)PFA1(cfa);
307: #else
308: #ifdef DEBUG
309: {
310: CFA_TO_NAME(cfa);
311: fprintf(stderr,"%08lx: col: %08lx %.*s\n",(Cell)ip,(Cell)PFA1(cfa),
312: len,name);
313: }
314: #endif
315: #ifdef CISC_NEXT
316: /* this is the simple version */
317: *--rp = (Cell)ip;
318: SET_IP((Xt *)PFA1(cfa));
319: SUPER_END;
320: NEXT;
321: #else
322: /* this one is important, so we help the compiler optimizing */
323: {
324: DEF_CA
325: rp[-1] = (Cell)ip;
326: SET_IP((Xt *)PFA1(cfa));
327: SUPER_END;
328: NEXT_P1;
329: rp--;
330: NEXT_P2;
331: }
332: #endif
333: #endif
334: }
335:
336: docon:
337: {
338: #ifdef DEBUG
339: fprintf(stderr,"%08lx: con: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));
340: #endif
341: #ifdef USE_TOS
342: *sp-- = spTOS;
343: spTOS = *(Cell *)PFA1(cfa);
344: #else
345: *--sp = *(Cell *)PFA1(cfa);
346: #endif
347: }
348: #ifdef NO_IP
349: goto *next_code;
350: #else
351: NEXT_P0;
352: NEXT;
353: #endif
354:
355: dovar:
356: {
357: #ifdef DEBUG
358: fprintf(stderr,"%08lx: var: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
359: #endif
360: #ifdef USE_TOS
361: *sp-- = spTOS;
362: spTOS = (Cell)PFA1(cfa);
363: #else
364: *--sp = (Cell)PFA1(cfa);
365: #endif
366: }
367: #ifdef NO_IP
368: goto *next_code;
369: #else
370: NEXT_P0;
371: NEXT;
372: #endif
373:
374: douser:
375: {
376: #ifdef DEBUG
377: fprintf(stderr,"%08lx: user: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
378: #endif
379: #ifdef USE_TOS
380: *sp-- = spTOS;
381: spTOS = (Cell)(up+*(Cell*)PFA1(cfa));
382: #else
383: *--sp = (Cell)(up+*(Cell*)PFA1(cfa));
384: #endif
385: }
386: #ifdef NO_IP
387: goto *next_code;
388: #else
389: NEXT_P0;
390: NEXT;
391: #endif
392:
393: dodefer:
394: {
395: #ifdef DEBUG
396: fprintf(stderr,"%08lx: defer: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));
397: #endif
398: SUPER_END;
399: EXEC(*(Xt *)PFA1(cfa));
400: }
401:
402: dofield:
403: {
404: #ifdef DEBUG
405: fprintf(stderr,"%08lx: field: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
406: #endif
407: spTOS += *(Cell*)PFA1(cfa);
408: }
409: #ifdef NO_IP
410: goto *next_code;
411: #else
412: NEXT_P0;
413: NEXT;
414: #endif
415:
416: dodoes:
417: /* this assumes the following structure:
418: defining-word:
419:
420: ...
421: DOES>
422: (possible padding)
423: possibly handler: jmp dodoes
424: (possible branch delay slot(s))
425: Forth code after DOES>
426:
427: defined word:
428:
429: cfa: address of or jump to handler OR
430: address of or jump to dodoes, address of DOES-code
431: pfa:
432:
433: */
434: #ifdef NO_IP
435: *--rp = next_code;
436: IF_spTOS(spTOS = sp[0]);
437: sp--;
438: spTOS = (Cell)PFA(cfa);
439: goto **(Label *)DOES_CODE1(cfa);
440: #else
441: {
442: /* fprintf(stderr, "Got CFA %08lx at doescode %08lx/%08lx: does: %08lx\n",cfa,(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa));*/
443: #ifdef DEBUG
444: fprintf(stderr,"%08lx/%08lx: does: %08lx\n",(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa));
445: fflush(stderr);
446: #endif
447: *--rp = (Cell)ip;
448: /* PFA1 might collide with DOES_CODE1 here, so we use PFA */
449: #ifdef USE_TOS
450: *sp-- = spTOS;
451: spTOS = (Cell)PFA(cfa);
452: #else
453: *--sp = (Cell)PFA(cfa);
454: #endif
455: SET_IP(DOES_CODE1(cfa));
456: SUPER_END;
457: /* fprintf(stderr,"TOS = %08lx, IP=%08lx\n", spTOS, IP);*/
458: }
459: NEXT;
460: #endif
461:
462: #ifndef IN_ENGINE2
463: #define LABEL(name) I_##name:
464: #else
465: #define LABEL(name) J_##name: asm(".skip 16"); I_##name:
466: #endif
467: #define LABEL2(name) K_##name:
468: #include "prim.i"
469: #undef LABEL
470: after_last: return (Label *)0;
471: /*needed only to get the length of the last primitive */
472: }'
473: )
474:
475: #define VARIANT(v) (v)
476: #define JUMP(target) goto I_noop
477:
478: Label *engine enginerest
479:
480: #ifndef NO_DYNAMIC
481:
482: #ifdef NO_IP
483: #undef VARIANT
484: #define VARIANT(v) ((v)^0xffffffff)
485: #undef JUMP
486: #define JUMP(target) goto K_lit
487: Label *engine3 enginerest
488: #endif
489:
490: #undef VARIANT
491: #define VARIANT(v) (v)
492: #undef JUMP
493: #define JUMP(target) goto I_noop
494: #define IN_ENGINE2
495: Label *engine2 enginerest
496: #endif
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