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 <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: /* conversion on fetch */
101:
102: #define vm_Cell2f(_cell,_x) ((_x)=(Bool)(_cell))
103: #define vm_Cell2c(_cell,_x) ((_x)=(Char)(_cell))
104: #define vm_Cell2n(_cell,_x) ((_x)=(Cell)(_cell))
105: #define vm_Cell2w(_cell,_x) ((_x)=(Cell)(_cell))
106: #define vm_Cell2u(_cell,_x) ((_x)=(UCell)(_cell))
107: #define vm_Cell2a_(_cell,_x) ((_x)=(Cell *)(_cell))
108: #define vm_Cell2c_(_cell,_x) ((_x)=(Char *)(_cell))
109: #define vm_Cell2f_(_cell,_x) ((_x)=(Float *)(_cell))
110: #define vm_Cell2df_(_cell,_x) ((_x)=(DFloat *)(_cell))
111: #define vm_Cell2sf_(_cell,_x) ((_x)=(SFloat *)(_cell))
112: #define vm_Cell2xt(_cell,_x) ((_x)=(Xt)(_cell))
113: #define vm_Cell2f83name(_cell,_x) ((_x)=(struct F83Name *)(_cell))
114: #define vm_Cell2longname(_cell,_x) ((_x)=(struct Longname *)(_cell))
115: #define vm_Float2r(_float,_x) (_x=_float)
116:
117: /* conversion on store */
118:
119: #define vm_f2Cell(_x,_cell) ((_cell)=(Cell)(_x))
120: #define vm_c2Cell(_x,_cell) ((_cell)=(Cell)(_x))
121: #define vm_n2Cell(_x,_cell) ((_cell)=(Cell)(_x))
122: #define vm_w2Cell(_x,_cell) ((_cell)=(Cell)(_x))
123: #define vm_u2Cell(_x,_cell) ((_cell)=(Cell)(_x))
124: #define vm_a_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
125: #define vm_c_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
126: #define vm_f_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
127: #define vm_df_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
128: #define vm_sf_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
129: #define vm_xt2Cell(_x,_cell) ((_cell)=(Cell)(_x))
130: #define vm_f83name2Cell(_x,_cell) ((_cell)=(Cell)(_x))
131: #define vm_longname2Cell(_x,_cell) ((_cell)=(Cell)(_x))
132: #define vm_r2Float(_x,_float) (_float=_x)
133:
134: #define vm_Cell2Cell(_x,_y) (_y=_x)
135:
136: #ifdef NO_IP
137: #define IMM_ARG(access,value) (VARIANT(value))
138: #else
139: #define IMM_ARG(access,value) (access)
140: #endif
141:
142: /* if machine.h has not defined explicit registers, define them as implicit */
143: #ifndef IPREG
144: #define IPREG
145: #endif
146: #ifndef SPREG
147: #define SPREG
148: #endif
149: #ifndef RPREG
150: #define RPREG
151: #endif
152: #ifndef FPREG
153: #define FPREG
154: #endif
155: #ifndef LPREG
156: #define LPREG
157: #endif
158: #ifndef CAREG
159: #define CAREG
160: #endif
161: #ifndef CFAREG
162: #define CFAREG
163: #endif
164: #ifndef UPREG
165: #define UPREG
166: #endif
167: #ifndef TOSREG
168: #define TOSREG
169: #endif
170: #ifndef spbREG
171: #define spbREG
172: #endif
173: #ifndef spcREG
174: #define spcREG
175: #endif
176: #ifndef spdREG
177: #define spdREG
178: #endif
179: #ifndef speREG
180: #define speREG
181: #endif
182: #ifndef spfREG
183: #define spfREG
184: #endif
185: #ifndef spgREG
186: #define spgREG
187: #endif
188: #ifndef sphREG
189: #define sphREG
190: #endif
191: #ifndef FTOSREG
192: #define FTOSREG
193: #endif
194:
195: #ifndef CPU_DEP1
196: # define CPU_DEP1 0
197: #endif
198:
199: /* instructions containing SUPER_END must be the last instruction of a
200: super-instruction (e.g., branches, EXECUTE, and other instructions
201: ending the basic block). Instructions containing SET_IP get this
202: automatically, so you usually don't have to write it. If you have
203: to write it, write it after IP points to the next instruction.
204: Used for profiling. Don't write it in a word containing SET_IP, or
205: the following block will be counted twice. */
206: #ifdef VM_PROFILING
207: #define SUPER_END vm_count_block(IP)
208: #else
209: #define SUPER_END
210: #endif
211: #define SUPER_CONTINUE
212:
213: #ifdef GFORTH_DEBUGGING
214: #if DEBUG
215: #define NAME(string) { saved_ip=ip; asm("# "string); fprintf(stderr,"%08lx depth=%3ld: "string"\n",(Cell)ip,sp0+3-sp);}
216: #else /* !DEBUG */
217: #define NAME(string) { saved_ip=ip; asm(""); }
218: /* the asm here is to avoid reordering of following stuff above the
219: assignment; this is an old-style asm (no operands), and therefore
220: is treated like "asm volatile ..."; i.e., it prevents most
221: reorderings across itself. We want the assignment above first,
222: because the stack loads may already cause a stack underflow. */
223: #endif /* !DEBUG */
224: #elif DEBUG
225: # 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); }
226: #else
227: # define NAME(string) asm("# "string);
228: #endif
229:
230: #ifdef DEBUG
231: #define CFA_TO_NAME(__cfa) \
232: Cell len, i; \
233: char * name = __cfa; \
234: for(i=0; i<32; i+=sizeof(Cell)) { \
235: len = ((Cell*)name)[-1]; \
236: if(len < 0) { \
237: len &= 0x1F; \
238: if((len+sizeof(Cell)) > i) break; \
239: } len = 0; \
240: name -= sizeof(Cell); \
241: }
242: #endif
243:
244: #if defined(HAS_FFCALL) || defined(HAS_LIBFFI)
245: #define SAVE_REGS IF_fpTOS(fp[0]=fpTOS); gforth_SP=sp; gforth_FP=fp; gforth_RP=rp; gforth_LP=lp;
246: #define REST_REGS sp=gforth_SP; fp=gforth_FP; rp=gforth_RP; lp=gforth_LP; IF_fpTOS(fpTOS=fp[0]);
247: #endif
248:
249: #if !defined(ENGINE)
250: /* normal engine */
251: #define VARIANT(v) (v)
252: #define JUMP(target) goto I_noop
253: #define LABEL(name) H_##name: asm(""); I_##name:
254:
255: #elif ENGINE==2
256: /* variant with padding between VM instructions for finding out
257: cross-inst jumps (for dynamic code) */
258: #define engine engine2
259: #define VARIANT(v) (v)
260: #define JUMP(target) goto I_noop
261: #define LABEL(name) H_##name: SKIP16; I_##name:
262:
263: #elif ENGINE==3
264: /* variant with different immediate arguments for finding out
265: immediate arguments (for native code) */
266: #define engine engine3
267: #define VARIANT(v) ((v)^0xffffffff)
268: #define JUMP(target) goto K_lit
269: #define LABEL(name) H_##name: asm(""); I_##name:
270: #else
271: #error illegal ENGINE value
272: #endif /* ENGINE */
273:
274: /* the asm(""); is there to get a stop compiled on Itanium */
275: #define LABEL2(name) K_##name: asm("");
276: #define LABEL3(name) J_##name: asm("");
277:
278: Label *engine(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0)
279: /* executes code at ip, if ip!=NULL
280: returns array of machine code labels (for use in a loader), if ip==NULL
281: */
282: {
283: #ifndef GFORTH_DEBUGGING
284: register Cell *rp RPREG;
285: #endif
286: #ifndef NO_IP
287: register Xt *ip IPREG = ip0;
288: #endif
289: register Cell *sp SPREG = sp0;
290: register Float *fp FPREG = fp0;
291: register Address lp LPREG = lp0;
292: register Xt cfa CFAREG;
293: register Label real_ca CAREG;
294: #ifdef MORE_VARS
295: MORE_VARS
296: #endif
297: #ifdef HAS_FFCALL
298: av_alist alist;
299: extern va_alist clist;
300: float frv;
301: int irv;
302: double drv;
303: long long llrv;
304: void * prv;
305: #endif
306: #ifdef HAS_LIBFFI
307: extern void * ritem;
308: extern void ** clist;
309: extern void ffi_callback(ffi_cif * cif, void * resp, void ** args, Xt * ip);
310: #endif
311: register Address up UPREG = gforth_UP;
312: register Cell MAYBE_UNUSED spTOS TOSREG;
313: register Cell MAYBE_UNUSED spb spbREG;
314: register Cell MAYBE_UNUSED spc spcREG;
315: register Cell MAYBE_UNUSED spd spdREG;
316: register Cell MAYBE_UNUSED spe speREG;
317: register Cell MAYBE_UNUSED spf speREG;
318: register Cell MAYBE_UNUSED spg speREG;
319: register Cell MAYBE_UNUSED sph speREG;
320: IF_fpTOS(register Float fpTOS FTOSREG;)
321: #if defined(DOUBLY_INDIRECT)
322: static Label *symbols;
323: static void *routines[]= {
324: #define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0]))
325: #else /* !defined(DOUBLY_INDIRECT) */
326: static Label symbols[]= {
327: #define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0]))
328: #endif /* !defined(DOUBLY_INDIRECT) */
329: #define INST_ADDR(name) ((Label)&&I_##name)
330: #include PRIM_LAB_I
331: #undef INST_ADDR
332: (Label)0,
333: #define INST_ADDR(name) ((Label)&&K_##name)
334: #include PRIM_LAB_I
335: #undef INST_ADDR
336: #define INST_ADDR(name) ((Label)&&J_##name)
337: #include PRIM_LAB_I
338: #undef INST_ADDR
339: (Label)&&after_last,
340: (Label)&&before_goto,
341: (Label)&&after_goto,
342: /* just mention the H_ labels, so the SKIP16s are not optimized away */
343: #define INST_ADDR(name) ((Label)&&H_##name)
344: #include PRIM_LAB_I
345: #undef INST_ADDR
346: };
347: #ifdef CPU_DEP2
348: CPU_DEP2
349: #endif
350:
351: rp = rp0;
352: #ifdef DEBUG
353: fprintf(stderr,"ip=%x, sp=%x, rp=%x, fp=%x, lp=%x, up=%x\n",
354: (unsigned)ip0,(unsigned)sp,(unsigned)rp,
355: (unsigned)fp,(unsigned)lp,(unsigned)up);
356: #endif
357:
358: if (ip0 == NULL) {
359: #if defined(DOUBLY_INDIRECT)
360: #define CODE_OFFSET (26*sizeof(Cell))
361: #define XT_OFFSET (22*sizeof(Cell))
362: int i;
363: Cell code_offset = offset_image? CODE_OFFSET : 0;
364: Cell xt_offset = offset_image? XT_OFFSET : 0;
365:
366: symbols = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+CODE_OFFSET)+code_offset);
367: xts = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+XT_OFFSET)+xt_offset);
368: for (i=0; i<DOESJUMP+1; i++)
369: xts[i] = symbols[i] = (Label)routines[i];
370: for (; routines[i]!=0; i++) {
371: if (i>=MAX_SYMBOLS) {
372: fprintf(stderr,"gforth-ditc: more than %ld primitives\n",(long)MAX_SYMBOLS);
373: exit(1);
374: }
375: xts[i] = symbols[i] = &routines[i];
376: }
377: #endif /* defined(DOUBLY_INDIRECT) */
378: return symbols;
379: }
380:
381: #if !(defined(GFORTH_DEBUGGING) || defined(INDIRECT_THREADED) || defined(DOUBLY_INDIRECT) || defined(VM_PROFILING))
382: sp += STACK_CACHE_DEFAULT-1;
383: /* some of those registers are dead, but its simpler to initialize them all */ spTOS = sp[0];
384: spb = sp[-1];
385: spc = sp[-2];
386: spd = sp[-3];
387: spe = sp[-4];
388: spf = sp[-5];
389: spg = sp[-6];
390: sph = sp[-7];
391: #endif
392:
393: IF_fpTOS(fpTOS = fp[0]);
394: /* prep_terminal(); */
395: #ifdef NO_IP
396: goto *(*(Label *)ip0);
397: before_goto:
398: goto *real_ca;
399: after_goto:;
400: #else
401: SET_IP(ip);
402: SUPER_END; /* count the first block, too */
403: FIRST_NEXT;
404: #endif
405:
406: #ifdef CPU_DEP3
407: CPU_DEP3
408: #endif
409:
410: #include PRIM_I
411: after_last: return (Label *)0;
412: /*needed only to get the length of the last primitive */
413:
414: return (Label *)0;
415: }
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