1: /* Gforth virtual machine (aka inner interpreter)
2:
3: Copyright (C) 1995,1996,1997,1998,2000,2003,2004,2005,2006 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: #define USE_NO_FTOS
28:
29: #include "config.h"
30: #include "forth.h"
31: #include <ctype.h>
32: #include <stdio.h>
33: #include <string.h>
34: #include <math.h>
35: #include <assert.h>
36: #include <stdlib.h>
37: #include <errno.h>
38: #include "io.h"
39: #include "threaded.h"
40: #ifndef STANDALONE
41: #include <sys/types.h>
42: #include <sys/stat.h>
43: #include <fcntl.h>
44: #include <time.h>
45: #include <sys/time.h>
46: #include <unistd.h>
47: #include <pwd.h>
48: #include <dirent.h>
49: #include <wchar.h>
50: #include <sys/resource.h>
51: #ifdef HAVE_FNMATCH_H
52: #include <fnmatch.h>
53: #else
54: #include "fnmatch.h"
55: #endif
56: #else
57: #include "systypes.h"
58: #endif
59:
60: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN) /* what else? */
61: #include <dlfcn.h>
62: #endif
63: #if defined(_WIN32)
64: #include <windows.h>
65: #endif
66: #ifdef hpux
67: #include <dl.h>
68: #endif
69:
70: #ifdef HAS_FFCALL
71: #include <avcall.h>
72: #include <callback.h>
73: #endif
74:
75: #ifdef HAS_LIBFFI
76: #include <ffi.h>
77: #endif
78:
79: #ifndef SEEK_SET
80: /* should be defined in stdio.h, but some systems don't have it */
81: #define SEEK_SET 0
82: #endif
83:
84: #ifndef HAVE_FSEEKO
85: #define fseeko fseek
86: #endif
87:
88: #ifndef HAVE_FTELLO
89: #define ftello ftell
90: #endif
91:
92: #define NULLC '\0'
93:
94: #ifdef MEMCMP_AS_SUBROUTINE
95: extern int gforth_memcmp(const char * s1, const char * s2, size_t n);
96: #define memcmp(s1,s2,n) gforth_memcmp(s1,s2,n)
97: #endif
98:
99: #define NEWLINE '\n'
100:
101: /* These two flags control whether divisions are checked by software.
102: The CHECK_DIVISION_SW is for those cases where the event is a
103: division by zero or overflow on the C level, and might be reported
104: by hardware; we might check forr that in autoconf and set the
105: switch appropriately, but currently don't. The CHECK_DIVISION flag
106: is for the other cases. */
107: #ifdef GFORTH_DEBUGGING
108: #define CHECK_DIVISION_SW 1
109: #define CHECK_DIVISION 1
110: #else
111: #define CHECK_DIVISION_SW 0
112: #define CHECK_DIVISION 0
113: #endif
114:
115: /* conversion on fetch */
116:
117: #define vm_Cell2f(_cell,_x) ((_x)=(Bool)(_cell))
118: #define vm_Cell2c(_cell,_x) ((_x)=(Char)(_cell))
119: #define vm_Cell2n(_cell,_x) ((_x)=(Cell)(_cell))
120: #define vm_Cell2w(_cell,_x) ((_x)=(Cell)(_cell))
121: #define vm_Cell2u(_cell,_x) ((_x)=(UCell)(_cell))
122: #define vm_Cell2a_(_cell,_x) ((_x)=(Cell *)(_cell))
123: #define vm_Cell2c_(_cell,_x) ((_x)=(Char *)(_cell))
124: #define vm_Cell2f_(_cell,_x) ((_x)=(Float *)(_cell))
125: #define vm_Cell2df_(_cell,_x) ((_x)=(DFloat *)(_cell))
126: #define vm_Cell2sf_(_cell,_x) ((_x)=(SFloat *)(_cell))
127: #define vm_Cell2xt(_cell,_x) ((_x)=(Xt)(_cell))
128: #define vm_Cell2f83name(_cell,_x) ((_x)=(struct F83Name *)(_cell))
129: #define vm_Cell2longname(_cell,_x) ((_x)=(struct Longname *)(_cell))
130: #define vm_Float2r(_float,_x) (_x=_float)
131:
132: /* conversion on store */
133:
134: #define vm_f2Cell(_x,_cell) ((_cell)=(Cell)(_x))
135: #define vm_c2Cell(_x,_cell) ((_cell)=(Cell)(_x))
136: #define vm_n2Cell(_x,_cell) ((_cell)=(Cell)(_x))
137: #define vm_w2Cell(_x,_cell) ((_cell)=(Cell)(_x))
138: #define vm_u2Cell(_x,_cell) ((_cell)=(Cell)(_x))
139: #define vm_a_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
140: #define vm_c_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
141: #define vm_f_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
142: #define vm_df_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
143: #define vm_sf_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
144: #define vm_xt2Cell(_x,_cell) ((_cell)=(Cell)(_x))
145: #define vm_f83name2Cell(_x,_cell) ((_cell)=(Cell)(_x))
146: #define vm_longname2Cell(_x,_cell) ((_cell)=(Cell)(_x))
147: #define vm_r2Float(_x,_float) (_float=_x)
148:
149: #define vm_Cell2Cell(_x,_y) (_y=_x)
150:
151: #ifdef NO_IP
152: #define IMM_ARG(access,value) (VARIANT(value))
153: #else
154: #define IMM_ARG(access,value) (access)
155: #endif
156:
157: /* if machine.h has not defined explicit registers, define them as implicit */
158: #ifndef IPREG
159: #define IPREG
160: #endif
161: #ifndef SPREG
162: #define SPREG
163: #endif
164: #ifndef RPREG
165: #define RPREG
166: #endif
167: #ifndef FPREG
168: #define FPREG
169: #endif
170: #ifndef LPREG
171: #define LPREG
172: #endif
173: #ifndef CAREG
174: #define CAREG
175: #endif
176: #ifndef CFAREG
177: #define CFAREG
178: #endif
179: #ifndef UPREG
180: #define UPREG
181: #endif
182: #ifndef TOSREG
183: #define TOSREG
184: #endif
185: #ifndef spbREG
186: #define spbREG
187: #endif
188: #ifndef spcREG
189: #define spcREG
190: #endif
191: #ifndef spdREG
192: #define spdREG
193: #endif
194: #ifndef speREG
195: #define speREG
196: #endif
197: #ifndef spfREG
198: #define spfREG
199: #endif
200: #ifndef spgREG
201: #define spgREG
202: #endif
203: #ifndef sphREG
204: #define sphREG
205: #endif
206: #ifndef FTOSREG
207: #define FTOSREG
208: #endif
209:
210: #ifndef CPU_DEP1
211: # define CPU_DEP1 0
212: #endif
213:
214: /* instructions containing SUPER_END must be the last instruction of a
215: super-instruction (e.g., branches, EXECUTE, and other instructions
216: ending the basic block). Instructions containing SET_IP get this
217: automatically, so you usually don't have to write it. If you have
218: to write it, write it after IP points to the next instruction.
219: Used for profiling. Don't write it in a word containing SET_IP, or
220: the following block will be counted twice. */
221: #ifdef VM_PROFILING
222: #define SUPER_END vm_count_block(IP)
223: #else
224: #define SUPER_END
225: #endif
226: #define SUPER_CONTINUE
227:
228: #ifdef GFORTH_DEBUGGING
229: #if DEBUG
230: #define NAME(string) { saved_ip=ip; asm("# "string); fprintf(stderr,"%08lx depth=%3ld: "string"\n",(Cell)ip,sp0+3-sp);}
231: #else /* !DEBUG */
232: #define NAME(string) { saved_ip=ip; asm(""); }
233: /* the asm here is to avoid reordering of following stuff above the
234: assignment; this is an old-style asm (no operands), and therefore
235: is treated like "asm volatile ..."; i.e., it prevents most
236: reorderings across itself. We want the assignment above first,
237: because the stack loads may already cause a stack underflow. */
238: #endif /* !DEBUG */
239: #elif DEBUG
240: # 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); }
241: #else
242: # define NAME(string) asm("# "string);
243: #endif
244:
245: #ifdef DEBUG
246: #define CFA_TO_NAME(__cfa) \
247: Cell len, i; \
248: char * name = __cfa; \
249: for(i=0; i<32; i+=sizeof(Cell)) { \
250: len = ((Cell*)name)[-1]; \
251: if(len < 0) { \
252: len &= 0x1F; \
253: if((len+sizeof(Cell)) > i) break; \
254: } len = 0; \
255: name -= sizeof(Cell); \
256: }
257: #endif
258:
259: #if defined(HAS_FFCALL) || defined(HAS_LIBFFI)
260: #define SAVE_REGS IF_fpTOS(fp[0]=fpTOS); gforth_SP=sp; gforth_FP=fp; gforth_RP=rp; gforth_LP=lp;
261: #define REST_REGS sp=gforth_SP; fp=gforth_FP; rp=gforth_RP; lp=gforth_LP; IF_fpTOS(fpTOS=fp[0]);
262: #endif
263:
264: #if !defined(ENGINE)
265: /* normal engine */
266: #define VARIANT(v) (v)
267: #define JUMP(target) goto I_noop
268: #define LABEL(name) H_##name: asm(""); I_##name:
269:
270: #elif ENGINE==2
271: /* variant with padding between VM instructions for finding out
272: cross-inst jumps (for dynamic code) */
273: #define gforth_engine gforth_engine2
274: #define VARIANT(v) (v)
275: #define JUMP(target) goto I_noop
276: #define LABEL(name) H_##name: SKIP16; I_##name:
277:
278: #elif ENGINE==3
279: /* variant with different immediate arguments for finding out
280: immediate arguments (for native code) */
281: #define gforth_engine gforth_engine3
282: #define VARIANT(v) ((v)^0xffffffff)
283: #define JUMP(target) goto K_lit
284: #define LABEL(name) H_##name: asm(""); I_##name:
285: #else
286: #error illegal ENGINE value
287: #endif /* ENGINE */
288:
289: /* the asm(""); is there to get a stop compiled on Itanium */
290: #define LABEL2(name) K_##name: asm("");
291: #define LABEL3(name) J_##name: asm("");
292:
293: Label *gforth_engine(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0)
294: /* executes code at ip, if ip!=NULL
295: returns array of machine code labels (for use in a loader), if ip==NULL
296: */
297: {
298: #ifndef GFORTH_DEBUGGING
299: register Cell *rp RPREG;
300: #endif
301: #ifndef NO_IP
302: register Xt *ip IPREG = ip0;
303: #endif
304: register Cell *sp SPREG = sp0;
305: register Float *fp FPREG = fp0;
306: register Address lp LPREG = lp0;
307: register Xt cfa CFAREG;
308: register Label real_ca CAREG;
309: #ifdef MORE_VARS
310: MORE_VARS
311: #endif
312: #ifdef HAS_FFCALL
313: av_alist alist;
314: extern va_alist gforth_clist;
315: float frv;
316: int irv;
317: double drv;
318: long long llrv;
319: void * prv;
320: #endif
321: #ifdef HAS_LIBFFI
322: extern void * gforth_ritem;
323: extern void ** gforth_clist;
324: extern void ffi_callback(ffi_cif * cif, void * resp, void ** args, Xt * ip);
325: #endif
326: register Address up UPREG = gforth_UP;
327: register Cell MAYBE_UNUSED spTOS TOSREG;
328: register Cell MAYBE_UNUSED spb spbREG;
329: register Cell MAYBE_UNUSED spc spcREG;
330: register Cell MAYBE_UNUSED spd spdREG;
331: register Cell MAYBE_UNUSED spe speREG;
332: register Cell MAYBE_UNUSED spf speREG;
333: register Cell MAYBE_UNUSED spg speREG;
334: register Cell MAYBE_UNUSED sph speREG;
335: IF_fpTOS(register Float fpTOS FTOSREG;)
336: #if defined(DOUBLY_INDIRECT)
337: static Label *symbols;
338: static void *routines[]= {
339: #define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0]))
340: #else /* !defined(DOUBLY_INDIRECT) */
341: static Label symbols[]= {
342: #define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0]))
343: #endif /* !defined(DOUBLY_INDIRECT) */
344: #define INST_ADDR(name) ((Label)&&I_##name)
345: #include PRIM_LAB_I
346: #undef INST_ADDR
347: (Label)0,
348: #define INST_ADDR(name) ((Label)&&K_##name)
349: #include PRIM_LAB_I
350: #undef INST_ADDR
351: #define INST_ADDR(name) ((Label)&&J_##name)
352: #include PRIM_LAB_I
353: #undef INST_ADDR
354: (Label)&&after_last,
355: (Label)&&before_goto,
356: (Label)&&after_goto,
357: /* just mention the H_ labels, so the SKIP16s are not optimized away */
358: #define INST_ADDR(name) ((Label)&&H_##name)
359: #include PRIM_LAB_I
360: #undef INST_ADDR
361: };
362: #ifdef CPU_DEP2
363: CPU_DEP2
364: #endif
365:
366: rp = rp0;
367: #ifdef DEBUG
368: fprintf(stderr,"ip=%x, sp=%x, rp=%x, fp=%x, lp=%x, up=%x\n",
369: (unsigned)ip0,(unsigned)sp,(unsigned)rp,
370: (unsigned)fp,(unsigned)lp,(unsigned)up);
371: #endif
372:
373: if (ip0 == NULL) {
374: #if defined(DOUBLY_INDIRECT)
375: #define CODE_OFFSET (26*sizeof(Cell))
376: #define XT_OFFSET (22*sizeof(Cell))
377: int i;
378: Cell code_offset = offset_image? CODE_OFFSET : 0;
379: Cell xt_offset = offset_image? XT_OFFSET : 0;
380:
381: symbols = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+CODE_OFFSET)+code_offset);
382: xts = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+XT_OFFSET)+xt_offset);
383: for (i=0; i<DOESJUMP+1; i++)
384: xts[i] = symbols[i] = (Label)routines[i];
385: for (; routines[i]!=0; i++) {
386: if (i>=MAX_SYMBOLS) {
387: fprintf(stderr,"gforth-ditc: more than %ld primitives\n",(long)MAX_SYMBOLS);
388: exit(1);
389: }
390: xts[i] = symbols[i] = &routines[i];
391: }
392: #endif /* defined(DOUBLY_INDIRECT) */
393: return symbols;
394: }
395:
396: #if !(defined(GFORTH_DEBUGGING) || defined(INDIRECT_THREADED) || defined(DOUBLY_INDIRECT) || defined(VM_PROFILING))
397: sp += STACK_CACHE_DEFAULT-1;
398: /* some of those registers are dead, but its simpler to initialize them all */ spTOS = sp[0];
399: spb = sp[-1];
400: spc = sp[-2];
401: spd = sp[-3];
402: spe = sp[-4];
403: spf = sp[-5];
404: spg = sp[-6];
405: sph = sp[-7];
406: #endif
407:
408: IF_fpTOS(fpTOS = fp[0]);
409: /* prep_terminal(); */
410: #ifdef NO_IP
411: goto *(*(Label *)ip0);
412: before_goto:
413: goto *real_ca;
414: after_goto:;
415: #else
416: SET_IP(ip);
417: SUPER_END; /* count the first block, too */
418: FIRST_NEXT;
419: #endif
420:
421: #ifdef CPU_DEP3
422: CPU_DEP3
423: #endif
424:
425: #include PRIM_I
426: after_last: return (Label *)0;
427: /*needed only to get the length of the last primitive */
428:
429: return (Label *)0;
430: }
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