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