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engine /
engine.c
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Sun Jan 26 20:56:38 2003 UTC (21 years, 2 months ago) by
anton
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use AC_SYS_LARGEFILE instead of declaring this stuff unconditionally
moved memcasecmp() into support.c
eliminated -TEXT (all uses replaced, except within prim)
converted CAPSCOMP and -TRAILING into high-level words
folded C code for more complex primitives into support.c
Fliterals are now decompiled ok
f.rdp etc. documentation changes
added test cases for SEARCH
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: #include "config.h"
23: #include "forth.h"
24: #include <ctype.h>
25: #include <stdio.h>
26: #include <string.h>
27: #include <math.h>
28: #include <assert.h>
29: #include <stdlib.h>
30: #include <errno.h>
31: #include "io.h"
32: #include "threaded.h"
33: #ifndef STANDALONE
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>
41: #include <dirent.h>
42: #include <sys/resource.h>
43: #ifdef HAVE_FNMATCH_H
44: #include <fnmatch.h>
45: #else
46: #include "fnmatch.h"
47: #endif
48: #else
49: #include "systypes.h"
50: #endif
51:
52: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN) /* what else? */
53: #include <dlfcn.h>
54: #endif
55: #if defined(_WIN32)
56: #include <windows.h>
57: #endif
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: #ifndef HAVE_FSEEKO
68: #define fseeko fseek
69: #endif
70:
71: #ifndef HAVE_FTELLO
72: #define ftello ftell
73: #endif
74:
75: struct F83Name {
76: struct F83Name *next; /* the link field for old hands */
77: char countetc;
78: char name[0];
79: };
80:
81: #define F83NAME_COUNT(np) ((np)->countetc & 0x1f)
82:
83: #define NULLC '\0'
84:
85: #ifdef MEMCMP_AS_SUBROUTINE
86: extern int gforth_memcmp(const char * s1, const char * s2, size_t n);
87: #define memcmp(s1,s2,n) gforth_memcmp(s1,s2,n)
88: #endif
89:
90: #define NEWLINE '\n'
91:
92: /* conversion on fetch */
93:
94: #define vm_Cell2f(_cell,_x) ((_x)=(Bool)(_cell))
95: #define vm_Cell2c(_cell,_x) ((_x)=(Char)(_cell))
96: #define vm_Cell2n(_cell,_x) ((_x)=(Cell)(_cell))
97: #define vm_Cell2w(_cell,_x) ((_x)=(Cell)(_cell))
98: #define vm_Cell2u(_cell,_x) ((_x)=(UCell)(_cell))
99: #define vm_Cell2a_(_cell,_x) ((_x)=(Cell *)(_cell))
100: #define vm_Cell2c_(_cell,_x) ((_x)=(Char *)(_cell))
101: #define vm_Cell2f_(_cell,_x) ((_x)=(Float *)(_cell))
102: #define vm_Cell2df_(_cell,_x) ((_x)=(DFloat *)(_cell))
103: #define vm_Cell2sf_(_cell,_x) ((_x)=(SFloat *)(_cell))
104: #define vm_Cell2xt(_cell,_x) ((_x)=(Xt)(_cell))
105: #define vm_Cell2f83name(_cell,_x) ((_x)=(struct F83Name *)(_cell))
106: #define vm_Cell2longname(_cell,_x) ((_x)=(struct Longname *)(_cell))
107: #define vm_Float2r(_float,_x) (_x=_float)
108:
109: /* conversion on store */
110:
111: #define vm_f2Cell(_x,_cell) ((_cell)=(Cell)(_x))
112: #define vm_c2Cell(_x,_cell) ((_cell)=(Cell)(_x))
113: #define vm_n2Cell(_x,_cell) ((_cell)=(Cell)(_x))
114: #define vm_w2Cell(_x,_cell) ((_cell)=(Cell)(_x))
115: #define vm_u2Cell(_x,_cell) ((_cell)=(Cell)(_x))
116: #define vm_a_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
117: #define vm_c_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
118: #define vm_f_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
119: #define vm_df_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
120: #define vm_sf_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
121: #define vm_xt2Cell(_x,_cell) ((_cell)=(Cell)(_x))
122: #define vm_f83name2Cell(_x,_cell) ((_cell)=(Cell)(_x))
123: #define vm_longname2Cell(_x,_cell) ((_cell)=(Cell)(_x))
124: #define vm_r2Float(_x,_float) (_float=_x)
125:
126: #define vm_Cell2Cell(_x,_y) (_y=_x)
127:
128: #ifdef NO_IP
129: #define IMM_ARG(access,value) (VARIANT(value))
130: #else
131: #define IMM_ARG(access,value) (access)
132: #endif
133:
134: /* if machine.h has not defined explicit registers, define them as implicit */
135: #ifndef IPREG
136: #define IPREG
137: #endif
138: #ifndef SPREG
139: #define SPREG
140: #endif
141: #ifndef RPREG
142: #define RPREG
143: #endif
144: #ifndef FPREG
145: #define FPREG
146: #endif
147: #ifndef LPREG
148: #define LPREG
149: #endif
150: #ifndef CFAREG
151: #define CFAREG
152: #endif
153: #ifndef UPREG
154: #define UPREG
155: #endif
156: #ifndef TOSREG
157: #define TOSREG
158: #endif
159: #ifndef FTOSREG
160: #define FTOSREG
161: #endif
162:
163: #ifndef CPU_DEP1
164: # define CPU_DEP1 0
165: #endif
166:
167: /* instructions containing these must be the last instruction of a
168: super-instruction (e.g., branches, EXECUTE, and other instructions
169: ending the basic block). Instructions containing SET_IP get this
170: automatically, so you usually don't have to write it. If you have
171: to write it, write it after IP points to the next instruction.
172: Used for profiling. Don't write it in a word containing SET_IP, or
173: the following block will be counted twice. */
174: #ifdef VM_PROFILING
175: #define SUPER_END vm_count_block(IP)
176: #else
177: #define SUPER_END
178: #endif
179: #define SUPER_CONTINUE
180:
181: #ifdef DEBUG
182: #define CFA_TO_NAME(__cfa) \
183: Cell len, i; \
184: char * name = __cfa; \
185: for(i=0; i<32; i+=sizeof(Cell)) { \
186: len = ((Cell*)name)[-1]; \
187: if(len < 0) { \
188: len &= 0x1F; \
189: if((len+sizeof(Cell)) > i) break; \
190: } len = 0; \
191: name -= sizeof(Cell); \
192: }
193: #endif
194:
195: #if !defined(ENGINE)
196: /* normal engine */
197: #define VARIANT(v) (v)
198: #define JUMP(target) goto I_noop
199: #define LABEL(name) J_##name: asm(""); I_##name:
200:
201: #elif ENGINE==2
202: /* variant with padding between VM instructions for finding out
203: cross-inst jumps (for dynamic code) */
204: #define engine engine2
205: #define VARIANT(v) (v)
206: #define JUMP(target) goto I_noop
207: #define LABEL(name) J_##name: SKIP16; I_##name:
208: #define IN_ENGINE2
209:
210: #elif ENGINE==3
211: /* variant with different immediate arguments for finding out
212: immediate arguments (for native code) */
213: #define engine engine3
214: #define VARIANT(v) ((v)^0xffffffff)
215: #define JUMP(target) goto K_lit
216: #define LABEL(name) J_##name: asm(""); I_##name:
217: #else
218: #error illegal ENGINE value
219: #endif /* ENGINE */
220:
221: #define LABEL2(name) K_##name:
222:
223:
224: Label *engine(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0)
225: /* executes code at ip, if ip!=NULL
226: returns array of machine code labels (for use in a loader), if ip==NULL
227: */
228: {
229: #ifndef GFORTH_DEBUGGING
230: register Cell *rp RPREG;
231: #endif
232: #ifndef NO_IP
233: register Xt *ip IPREG = ip0;
234: #endif
235: register Cell *sp SPREG = sp0;
236: register Float *fp FPREG = fp0;
237: register Address lp LPREG = lp0;
238: register Xt cfa CFAREG;
239: #ifdef MORE_VARS
240: MORE_VARS
241: #endif
242: register Address up UPREG = UP;
243: IF_spTOS(register Cell spTOS TOSREG;)
244: IF_fpTOS(register Float fpTOS FTOSREG;)
245: #if defined(DOUBLY_INDIRECT)
246: static Label *symbols;
247: static void *routines[]= {
248: #define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0]))
249: #else /* !defined(DOUBLY_INDIRECT) */
250: static Label symbols[]= {
251: #define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0]))
252: #endif /* !defined(DOUBLY_INDIRECT) */
253: (Label)&&docol,
254: (Label)&&docon,
255: (Label)&&dovar,
256: (Label)&&douser,
257: (Label)&&dodefer,
258: (Label)&&dofield,
259: (Label)&&dodoes,
260: /* the following entry is normally unused;
261: it is there because its index indicates a does-handler */
262: CPU_DEP1,
263: #define INST_ADDR(name) ((Label)&&I_##name)
264: #include "prim_lab.i"
265: #undef INST_ADDR
266: (Label)&&after_last,
267: (Label)0,
268: #define INST_ADDR(name) ((Label)&&K_##name)
269: #include "prim_lab.i"
270: #undef INST_ADDR
271: #define INST_ADDR(name) ((Label)&&J_##name)
272: #include "prim_lab.i"
273: #undef INST_ADDR
274: };
275: #ifdef CPU_DEP2
276: CPU_DEP2
277: #endif
278:
279: rp = rp0;
280: #ifdef DEBUG
281: fprintf(stderr,"ip=%x, sp=%x, rp=%x, fp=%x, lp=%x, up=%x\n",
282: (unsigned)ip0,(unsigned)sp,(unsigned)rp,
283: (unsigned)fp,(unsigned)lp,(unsigned)up);
284: #endif
285:
286: if (ip0 == NULL) {
287: #if defined(DOUBLY_INDIRECT)
288: #define CODE_OFFSET (26*sizeof(Cell))
289: #define XT_OFFSET (22*sizeof(Cell))
290: int i;
291: Cell code_offset = offset_image? CODE_OFFSET : 0;
292: Cell xt_offset = offset_image? XT_OFFSET : 0;
293:
294: symbols = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+CODE_OFFSET)+code_offset);
295: xts = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+XT_OFFSET)+xt_offset);
296: for (i=0; i<DOESJUMP+1; i++)
297: xts[i] = symbols[i] = (Label)routines[i];
298: for (; routines[i]!=0; i++) {
299: if (i>=MAX_SYMBOLS) {
300: fprintf(stderr,"gforth-ditc: more than %d primitives\n",MAX_SYMBOLS);
301: exit(1);
302: }
303: xts[i] = symbols[i] = &routines[i];
304: }
305: #endif /* defined(DOUBLY_INDIRECT) */
306: return symbols;
307: }
308:
309: IF_spTOS(spTOS = sp[0]);
310: IF_fpTOS(fpTOS = fp[0]);
311: /* prep_terminal(); */
312: #ifdef NO_IP
313: goto *(*(Label *)ip0);
314: #else
315: SET_IP(ip);
316: SUPER_END; /* count the first block, too */
317: NEXT;
318: #endif
319:
320: #ifdef CPU_DEP3
321: CPU_DEP3
322: #endif
323:
324: docol:
325: {
326: #ifdef NO_IP
327: *--rp = next_code;
328: goto **(Label *)PFA1(cfa);
329: #else
330: #ifdef DEBUG
331: {
332: CFA_TO_NAME(cfa);
333: fprintf(stderr,"%08lx: col: %08lx %.*s\n",(Cell)ip,(Cell)PFA1(cfa),
334: len,name);
335: }
336: #endif
337: #ifdef CISC_NEXT
338: /* this is the simple version */
339: *--rp = (Cell)ip;
340: SET_IP((Xt *)PFA1(cfa));
341: SUPER_END;
342: NEXT;
343: #else
344: /* this one is important, so we help the compiler optimizing */
345: {
346: DEF_CA
347: rp[-1] = (Cell)ip;
348: SET_IP((Xt *)PFA1(cfa));
349: SUPER_END;
350: NEXT_P1;
351: rp--;
352: NEXT_P2;
353: }
354: #endif
355: #endif
356: }
357:
358: docon:
359: {
360: #ifdef DEBUG
361: fprintf(stderr,"%08lx: con: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));
362: #endif
363: #ifdef USE_TOS
364: *sp-- = spTOS;
365: spTOS = *(Cell *)PFA1(cfa);
366: #else
367: *--sp = *(Cell *)PFA1(cfa);
368: #endif
369: }
370: #ifdef NO_IP
371: goto *next_code;
372: #else
373: NEXT_P0;
374: NEXT;
375: #endif
376:
377: dovar:
378: {
379: #ifdef DEBUG
380: fprintf(stderr,"%08lx: var: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
381: #endif
382: #ifdef USE_TOS
383: *sp-- = spTOS;
384: spTOS = (Cell)PFA1(cfa);
385: #else
386: *--sp = (Cell)PFA1(cfa);
387: #endif
388: }
389: #ifdef NO_IP
390: goto *next_code;
391: #else
392: NEXT_P0;
393: NEXT;
394: #endif
395:
396: douser:
397: {
398: #ifdef DEBUG
399: fprintf(stderr,"%08lx: user: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
400: #endif
401: #ifdef USE_TOS
402: *sp-- = spTOS;
403: spTOS = (Cell)(up+*(Cell*)PFA1(cfa));
404: #else
405: *--sp = (Cell)(up+*(Cell*)PFA1(cfa));
406: #endif
407: }
408: #ifdef NO_IP
409: goto *next_code;
410: #else
411: NEXT_P0;
412: NEXT;
413: #endif
414:
415: dodefer:
416: {
417: #ifdef DEBUG
418: fprintf(stderr,"%08lx: defer: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));
419: #endif
420: SUPER_END;
421: EXEC(*(Xt *)PFA1(cfa));
422: }
423:
424: dofield:
425: {
426: #ifdef DEBUG
427: fprintf(stderr,"%08lx: field: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
428: #endif
429: spTOS += *(Cell*)PFA1(cfa);
430: }
431: #ifdef NO_IP
432: goto *next_code;
433: #else
434: NEXT_P0;
435: NEXT;
436: #endif
437:
438: dodoes:
439: /* this assumes the following structure:
440: defining-word:
441:
442: ...
443: DOES>
444: (possible padding)
445: possibly handler: jmp dodoes
446: (possible branch delay slot(s))
447: Forth code after DOES>
448:
449: defined word:
450:
451: cfa: address of or jump to handler OR
452: address of or jump to dodoes, address of DOES-code
453: pfa:
454:
455: */
456: #ifdef NO_IP
457: *--rp = next_code;
458: IF_spTOS(spTOS = sp[0]);
459: sp--;
460: spTOS = (Cell)PFA(cfa);
461: goto **(Label *)DOES_CODE1(cfa);
462: #else
463: {
464: /* fprintf(stderr, "Got CFA %08lx at doescode %08lx/%08lx: does: %08lx\n",cfa,(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa));*/
465: #ifdef DEBUG
466: fprintf(stderr,"%08lx/%08lx: does: %08lx\n",(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa));
467: fflush(stderr);
468: #endif
469: *--rp = (Cell)ip;
470: /* PFA1 might collide with DOES_CODE1 here, so we use PFA */
471: #ifdef USE_TOS
472: *sp-- = spTOS;
473: spTOS = (Cell)PFA(cfa);
474: #else
475: *--sp = (Cell)PFA(cfa);
476: #endif
477: SET_IP(DOES_CODE1(cfa));
478: SUPER_END;
479: /* fprintf(stderr,"TOS = %08lx, IP=%08lx\n", spTOS, IP);*/
480: }
481: NEXT;
482: #endif
483:
484: #include "prim.i"
485: after_last: return (Label *)0;
486: /*needed only to get the length of the last primitive */
487: }
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