1: /* Gforth virtual machine (aka inner interpreter)
2:
3: Copyright (C) 1995,1996,1997,1998,2000,2003,2004,2005,2006,2007 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: #if defined(GFORTH_DEBUGGING) || defined(INDIRECT_THREADED) || defined(DOUBLY_INDIRECT) || defined(VM_PROFILING)
23: #define USE_NO_TOS
24: #else
25: #define USE_TOS
26: #endif
27:
28: #include "config.h"
29: #include "forth.h"
30: #include <ctype.h>
31: #include <stdio.h>
32: #include <string.h>
33: #include <math.h>
34: #include <assert.h>
35: #include <stdlib.h>
36: #include <errno.h>
37: #include "io.h"
38: #include "threaded.h"
39: #ifndef STANDALONE
40: #include <sys/types.h>
41: #include <sys/stat.h>
42: #include <fcntl.h>
43: #include <time.h>
44: #include <sys/time.h>
45: #include <unistd.h>
46: #include <pwd.h>
47: #include <dirent.h>
48: #include <wchar.h>
49: #include <sys/resource.h>
50: #ifdef HAVE_FNMATCH_H
51: #include <fnmatch.h>
52: #else
53: #include "fnmatch.h"
54: #endif
55: #else
56: /* #include <systypes.h> */
57: #endif
58:
59: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN) /* what else? */
60: #include <dlfcn.h>
61: #endif
62: #if defined(_WIN32)
63: #include <windows.h>
64: #endif
65: #ifdef hpux
66: #include <dl.h>
67: #endif
68:
69: #ifdef HAS_FFCALL
70: #include <avcall.h>
71: #include <callback.h>
72: #endif
73:
74: #ifdef HAS_LIBFFI
75: #include <ffi.h>
76: #endif
77:
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:
83: #ifndef HAVE_FSEEKO
84: #define fseeko fseek
85: #endif
86:
87: #ifndef HAVE_FTELLO
88: #define ftello ftell
89: #endif
90:
91: #define NULLC '\0'
92:
93: #ifdef MEMCMP_AS_SUBROUTINE
94: extern int gforth_memcmp(const char * s1, const char * s2, size_t n);
95: #define memcmp(s1,s2,n) gforth_memcmp(s1,s2,n)
96: #endif
97:
98: #define NEWLINE '\n'
99:
100: /* These two flags control whether divisions are checked by software.
101: The CHECK_DIVISION_SW is for those cases where the event is a
102: division by zero or overflow on the C level, and might be reported
103: by hardware; we might check forr that in autoconf and set the
104: switch appropriately, but currently don't. The CHECK_DIVISION flag
105: is for the other cases. */
106: #ifdef GFORTH_DEBUGGING
107: #define CHECK_DIVISION_SW 1
108: #define CHECK_DIVISION 1
109: #else
110: #define CHECK_DIVISION_SW 0
111: #define CHECK_DIVISION 0
112: #endif
113:
114: /* conversion on fetch */
115:
116: #define vm_Cell2f(_cell,_x) ((_x)=(Bool)(_cell))
117: #define vm_Cell2c(_cell,_x) ((_x)=(Char)(_cell))
118: #define vm_Cell2n(_cell,_x) ((_x)=(Cell)(_cell))
119: #define vm_Cell2w(_cell,_x) ((_x)=(Cell)(_cell))
120: #define vm_Cell2u(_cell,_x) ((_x)=(UCell)(_cell))
121: #define vm_Cell2a_(_cell,_x) ((_x)=(Cell *)(_cell))
122: #define vm_Cell2c_(_cell,_x) ((_x)=(Char *)(_cell))
123: #define vm_Cell2f_(_cell,_x) ((_x)=(Float *)(_cell))
124: #define vm_Cell2df_(_cell,_x) ((_x)=(DFloat *)(_cell))
125: #define vm_Cell2sf_(_cell,_x) ((_x)=(SFloat *)(_cell))
126: #define vm_Cell2xt(_cell,_x) ((_x)=(Xt)(_cell))
127: #define vm_Cell2f83name(_cell,_x) ((_x)=(struct F83Name *)(_cell))
128: #define vm_Cell2longname(_cell,_x) ((_x)=(struct Longname *)(_cell))
129: #define vm_Float2r(_float,_x) (_x=_float)
130:
131: /* conversion on store */
132:
133: #define vm_f2Cell(_x,_cell) ((_cell)=(Cell)(_x))
134: #define vm_c2Cell(_x,_cell) ((_cell)=(Cell)(_x))
135: #define vm_n2Cell(_x,_cell) ((_cell)=(Cell)(_x))
136: #define vm_w2Cell(_x,_cell) ((_cell)=(Cell)(_x))
137: #define vm_u2Cell(_x,_cell) ((_cell)=(Cell)(_x))
138: #define vm_a_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
139: #define vm_c_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
140: #define vm_f_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
141: #define vm_df_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
142: #define vm_sf_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
143: #define vm_xt2Cell(_x,_cell) ((_cell)=(Cell)(_x))
144: #define vm_f83name2Cell(_x,_cell) ((_cell)=(Cell)(_x))
145: #define vm_longname2Cell(_x,_cell) ((_cell)=(Cell)(_x))
146: #define vm_r2Float(_x,_float) (_float=_x)
147:
148: #define vm_Cell2Cell(_x,_y) (_y=_x)
149:
150: #ifdef NO_IP
151: #define IMM_ARG(access,value) (VARIANT(value))
152: #else
153: #define IMM_ARG(access,value) (access)
154: #endif
155:
156: /* if machine.h has not defined explicit registers, define them as implicit */
157: #ifndef IPREG
158: #define IPREG
159: #endif
160: #ifndef SPREG
161: #define SPREG
162: #endif
163: #ifndef RPREG
164: #define RPREG
165: #endif
166: #ifndef FPREG
167: #define FPREG
168: #endif
169: #ifndef LPREG
170: #define LPREG
171: #endif
172: #ifndef CAREG
173: #define CAREG
174: #endif
175: #ifndef CFAREG
176: #define CFAREG
177: #endif
178: #ifndef UPREG
179: #define UPREG
180: #endif
181: #ifndef TOSREG
182: #define TOSREG
183: #endif
184: #ifndef spbREG
185: #define spbREG
186: #endif
187: #ifndef spcREG
188: #define spcREG
189: #endif
190: #ifndef spdREG
191: #define spdREG
192: #endif
193: #ifndef speREG
194: #define speREG
195: #endif
196: #ifndef spfREG
197: #define spfREG
198: #endif
199: #ifndef spgREG
200: #define spgREG
201: #endif
202: #ifndef sphREG
203: #define sphREG
204: #endif
205: #ifndef FTOSREG
206: #define FTOSREG
207: #endif
208:
209: #ifndef CPU_DEP1
210: # define CPU_DEP1 0
211: #endif
212:
213: /* instructions containing SUPER_END must be the last instruction of a
214: super-instruction (e.g., branches, EXECUTE, and other instructions
215: ending the basic block). Instructions containing SET_IP get this
216: automatically, so you usually don't have to write it. If you have
217: to write it, write it after IP points to the next instruction.
218: Used for profiling. Don't write it in a word containing SET_IP, or
219: the following block will be counted twice. */
220: #ifdef VM_PROFILING
221: #define SUPER_END vm_count_block(IP)
222: #else
223: #define SUPER_END
224: #endif
225: #define SUPER_CONTINUE
226:
227: #ifdef ASMCOMMENT
228: /* an individualized asm statement so that (hopefully) gcc's optimizer
229: does not do cross-jumping */
230: #define asmcomment(string) asm(ASMCOMMENT string)
231: #else
232: /* we don't know how to do an asm comment, so we just do an empty asm */
233: #define asmcomment(string) asm("")
234: #endif
235:
236: #ifdef GFORTH_DEBUGGING
237: #if DEBUG
238: #define NAME(string) { saved_ip=ip; asmcomment(string); fprintf(stderr,"%08lx depth=%3ld tos=%016lx: "string"\n",(Cell)ip,sp0+3-sp,sp[0]);}
239: #else /* !DEBUG */
240: #define NAME(string) { saved_ip=ip; asm(""); }
241: /* the asm here is to avoid reordering of following stuff above the
242: assignment; this is an old-style asm (no operands), and therefore
243: is treated like "asm volatile ..."; i.e., it prevents most
244: reorderings across itself. We want the assignment above first,
245: because the stack loads may already cause a stack underflow. */
246: #endif /* !DEBUG */
247: #elif DEBUG
248: # 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); }
249: #else
250: # define NAME(string) asmcomment(string);
251: #endif
252:
253: #ifdef DEBUG
254: #define CFA_TO_NAME(__cfa) \
255: Cell len, i; \
256: char * name = __cfa; \
257: for(i=0; i<32; i+=sizeof(Cell)) { \
258: len = ((Cell*)name)[-1]; \
259: if(len < 0) { \
260: len &= 0x1F; \
261: if((len+sizeof(Cell)) > i) break; \
262: } len = 0; \
263: name -= sizeof(Cell); \
264: }
265: #endif
266:
267: #ifdef STANDALONE
268: jmp_buf throw_jmp_buf;
269:
270: void throw(int code)
271: {
272: longjmp(throw_jmp_buf,code); /* !! or use siglongjmp ? */
273: }
274: #endif
275:
276: #if defined(HAS_FFCALL) || defined(HAS_LIBFFI)
277: #define SAVE_REGS IF_fpTOS(fp[0]=fpTOS); gforth_SP=sp; gforth_FP=fp; gforth_RP=rp; gforth_LP=lp;
278: #define REST_REGS sp=gforth_SP; fp=gforth_FP; rp=gforth_RP; lp=gforth_LP; IF_fpTOS(fpTOS=fp[0]);
279: #endif
280:
281: #if !defined(ENGINE)
282: /* normal engine */
283: #define VARIANT(v) (v)
284: #define JUMP(target) goto I_noop
285: #define LABEL(name) H_##name: asm(""); I_##name:
286: #define LABEL3(name) J_##name: asm("");
287:
288: #elif ENGINE==2
289: /* variant with padding between VM instructions for finding out
290: cross-inst jumps (for dynamic code) */
291: #define gforth_engine gforth_engine2
292: #define VARIANT(v) (v)
293: #define JUMP(target) goto I_noop
294: #define LABEL(name) H_##name: SKIP16; I_##name:
295: /* the SKIP16 after LABEL3 is there, because the ARM gcc may place
296: some constants after the final branch, and may refer to them from
297: the code before label3. Since we don't copy the constants, we have
298: to make sure that such code is recognized as non-relocatable. */
299: #define LABEL3(name) J_##name: SKIP16;
300:
301: #elif ENGINE==3
302: /* variant with different immediate arguments for finding out
303: immediate arguments (for native code) */
304: #define gforth_engine gforth_engine3
305: #define VARIANT(v) ((v)^0xffffffff)
306: #define JUMP(target) goto K_lit
307: #define LABEL(name) H_##name: asm(""); I_##name:
308: #define LABEL3(name) J_##name: asm("");
309: #else
310: #error illegal ENGINE value
311: #endif /* ENGINE */
312:
313: /* the asm(""); is there to get a stop compiled on Itanium */
314: #define LABEL2(name) K_##name: asm("");
315:
316: Label *gforth_engine(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0)
317: /* executes code at ip, if ip!=NULL
318: returns array of machine code labels (for use in a loader), if ip==NULL
319: */
320: {
321: #ifndef GFORTH_DEBUGGING
322: register Cell *rp RPREG;
323: #endif
324: #ifndef NO_IP
325: register Xt *ip IPREG = ip0;
326: #endif
327: register Cell *sp SPREG = sp0;
328: register Float *fp FPREG = fp0;
329: register Address lp LPREG = lp0;
330: register Xt cfa CFAREG;
331: register Label real_ca CAREG;
332: #ifdef MORE_VARS
333: MORE_VARS
334: #endif
335: #ifdef HAS_FFCALL
336: av_alist alist;
337: extern va_alist gforth_clist;
338: float frv;
339: int irv;
340: double drv;
341: long long llrv;
342: void * prv;
343: #endif
344: #ifdef HAS_LIBFFI
345: extern void * gforth_ritem;
346: extern void ** gforth_clist;
347: extern void ffi_callback(ffi_cif * cif, void * resp, void ** args, Xt * ip);
348: #endif
349: register Address up UPREG = gforth_UP;
350: register Cell MAYBE_UNUSED spTOS TOSREG;
351: register Cell MAYBE_UNUSED spb spbREG;
352: register Cell MAYBE_UNUSED spc spcREG;
353: register Cell MAYBE_UNUSED spd spdREG;
354: register Cell MAYBE_UNUSED spe speREG;
355: register Cell MAYBE_UNUSED spf speREG;
356: register Cell MAYBE_UNUSED spg speREG;
357: register Cell MAYBE_UNUSED sph speREG;
358: IF_fpTOS(register Float fpTOS FTOSREG;)
359: #if defined(DOUBLY_INDIRECT)
360: static Label *symbols;
361: static void *routines[]= {
362: #define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0]))
363: #else /* !defined(DOUBLY_INDIRECT) */
364: static Label symbols[]= {
365: #define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0]))
366: #endif /* !defined(DOUBLY_INDIRECT) */
367: #define INST_ADDR(name) ((Label)&&I_##name)
368: #include PRIM_LAB_I
369: #undef INST_ADDR
370: (Label)0,
371: #define INST_ADDR(name) ((Label)&&K_##name)
372: #include PRIM_LAB_I
373: #undef INST_ADDR
374: #define INST_ADDR(name) ((Label)&&J_##name)
375: #include PRIM_LAB_I
376: #undef INST_ADDR
377: (Label)&&after_last,
378: (Label)&&before_goto,
379: (Label)&&after_goto,
380: /* just mention the H_ labels, so the SKIP16s are not optimized away */
381: #define INST_ADDR(name) ((Label)&&H_##name)
382: #include PRIM_LAB_I
383: #undef INST_ADDR
384: };
385: #ifdef STANDALONE
386: #define INST_ADDR(name) ((Label)&&I_##name)
387: #include "image.i"
388: #undef INST_ADDR
389: #endif
390: #ifdef CPU_DEP2
391: CPU_DEP2
392: #endif
393:
394: rp = rp0;
395: #ifdef DEBUG
396: fprintf(stderr,"ip=%x, sp=%x, rp=%x, fp=%x, lp=%x, up=%x\n",
397: (unsigned)ip0,(unsigned)sp,(unsigned)rp,
398: (unsigned)fp,(unsigned)lp,(unsigned)up);
399: #endif
400:
401: if (ip0 == NULL) {
402: #if defined(DOUBLY_INDIRECT)
403: #define CODE_OFFSET (26*sizeof(Cell))
404: #define XT_OFFSET (22*sizeof(Cell))
405: int i;
406: Cell code_offset = offset_image? CODE_OFFSET : 0;
407: Cell xt_offset = offset_image? XT_OFFSET : 0;
408:
409: symbols = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+CODE_OFFSET)+code_offset);
410: xts = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+XT_OFFSET)+xt_offset);
411: for (i=0; i<DOESJUMP+1; i++)
412: xts[i] = symbols[i] = (Label)routines[i];
413: for (; routines[i]!=0; i++) {
414: if (i>=MAX_SYMBOLS) {
415: fprintf(stderr,"gforth-ditc: more than %ld primitives\n",(long)MAX_SYMBOLS);
416: exit(1);
417: }
418: xts[i] = symbols[i] = &routines[i];
419: }
420: #endif /* defined(DOUBLY_INDIRECT) */
421: #ifdef STANDALONE
422: return image;
423: #else
424: return symbols;
425: #endif
426: }
427:
428: #if !(defined(GFORTH_DEBUGGING) || defined(INDIRECT_THREADED) || defined(DOUBLY_INDIRECT) || defined(VM_PROFILING))
429: sp += STACK_CACHE_DEFAULT-1;
430: /* some of those registers are dead, but its simpler to initialize them all */ spTOS = sp[0];
431: spb = sp[-1];
432: spc = sp[-2];
433: spd = sp[-3];
434: spe = sp[-4];
435: spf = sp[-5];
436: spg = sp[-6];
437: sph = sp[-7];
438: #endif
439:
440: IF_fpTOS(fpTOS = fp[0]);
441: /* prep_terminal(); */
442: #ifdef NO_IP
443: goto *(*(Label *)ip0);
444: before_goto:
445: goto *real_ca;
446: after_goto:;
447: #else
448: SET_IP(ip);
449: SUPER_END; /* count the first block, too */
450: FIRST_NEXT;
451: #endif
452:
453: #ifdef CPU_DEP3
454: CPU_DEP3
455: #endif
456:
457: #include PRIM_I
458: after_last: return (Label *)0;
459: /*needed only to get the length of the last primitive */
460:
461: return (Label *)0;
462: }
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to engine.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [gforth] / gforth / engine