1: /* Gforth virtual machine (aka inner interpreter)
2:
3: Copyright (C) 1995,1996,1997,1998,2000,2003 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: #define USE_NO_TOS
23: #define USE_NO_FTOS
24:
25: #include "config.h"
26: #include "forth.h"
27: #include <ctype.h>
28: #include <stdio.h>
29: #include <string.h>
30: #include <math.h>
31: #include <assert.h>
32: #include <stdlib.h>
33: #include <errno.h>
34: #include "io.h"
35: #include "threaded.h"
36: #ifndef STANDALONE
37: #include <sys/types.h>
38: #include <sys/stat.h>
39: #include <fcntl.h>
40: #include <time.h>
41: #include <sys/time.h>
42: #include <unistd.h>
43: #include <pwd.h>
44: #include <dirent.h>
45: #include <sys/resource.h>
46: #ifdef HAVE_FNMATCH_H
47: #include <fnmatch.h>
48: #else
49: #include "fnmatch.h"
50: #endif
51: #else
52: #include "systypes.h"
53: #endif
54:
55: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN) /* what else? */
56: #include <dlfcn.h>
57: #endif
58: #if defined(_WIN32)
59: #include <windows.h>
60: #endif
61: #ifdef hpux
62: #include <dl.h>
63: #endif
64:
65: #ifdef HAS_FFCALL
66: #include <avcall.h>
67: #include <callback.h>
68: #endif
69:
70: #ifndef SEEK_SET
71: /* should be defined in stdio.h, but some systems don't have it */
72: #define SEEK_SET 0
73: #endif
74:
75: #ifndef HAVE_FSEEKO
76: #define fseeko fseek
77: #endif
78:
79: #ifndef HAVE_FTELLO
80: #define ftello ftell
81: #endif
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 spaREG
160: #define spaREG
161: #endif
162: #ifndef spbREG
163: #define spbREG
164: #endif
165: #ifndef FTOSREG
166: #define FTOSREG
167: #endif
168:
169: #ifndef CPU_DEP1
170: # define CPU_DEP1 0
171: #endif
172:
173: /* instructions containing SUPER_END must be the last instruction of a
174: super-instruction (e.g., branches, EXECUTE, and other instructions
175: ending the basic block). Instructions containing SET_IP get this
176: automatically, so you usually don't have to write it. If you have
177: to write it, write it after IP points to the next instruction.
178: Used for profiling. Don't write it in a word containing SET_IP, or
179: the following block will be counted twice. */
180: #ifdef VM_PROFILING
181: #define SUPER_END vm_count_block(IP)
182: #else
183: #define SUPER_END
184: #endif
185: #define SUPER_CONTINUE
186:
187: #ifdef GFORTH_DEBUGGING
188: #define NAME(string) { saved_ip=ip; asm(""); }
189: /* the asm here is to avoid reordering of following stuff above the
190: assignment; this is an old-style asm (no operands), and therefore
191: is treated like "asm volatile ..."; i.e., it prevents most
192: reorderings across itself. We want the assignment above first,
193: because the stack loads may already cause a stack underflow. */
194: #elif DEBUG
195: # define NAME(string) fprintf(stderr,"%08lx depth=%3ld: "string"\n",(Cell)ip,sp0+3-sp);
196: #else
197: # define NAME(string)
198: #endif
199:
200: #ifdef DEBUG
201: #define CFA_TO_NAME(__cfa) \
202: Cell len, i; \
203: char * name = __cfa; \
204: for(i=0; i<32; i+=sizeof(Cell)) { \
205: len = ((Cell*)name)[-1]; \
206: if(len < 0) { \
207: len &= 0x1F; \
208: if((len+sizeof(Cell)) > i) break; \
209: } len = 0; \
210: name -= sizeof(Cell); \
211: }
212: #endif
213:
214: #ifdef HAS_FFCALL
215: #define SAVE_REGS IF_spTOS(sp[0]=spTOS); IF_fpTOS(fp[0]=fpTOS); SP=sp; FP=fp; RP=rp; LP=lp;
216: #define REST_REGS sp=SP; fp=FP; rp=RP; lp=LP; IF_spTOS(spTOS=sp[0]); IF_fpTOS(fpTOS=fp[0]);
217: #endif
218:
219: #if !defined(ENGINE)
220: /* normal engine */
221: #define VARIANT(v) (v)
222: #define JUMP(target) goto I_noop
223: #define LABEL(name) J_##name: asm(""); I_##name:
224:
225: #elif ENGINE==2
226: /* variant with padding between VM instructions for finding out
227: cross-inst jumps (for dynamic code) */
228: #define engine engine2
229: #define VARIANT(v) (v)
230: #define JUMP(target) goto I_noop
231: #define LABEL(name) J_##name: SKIP16; I_##name:
232: #define IN_ENGINE2
233:
234: #elif ENGINE==3
235: /* variant with different immediate arguments for finding out
236: immediate arguments (for native code) */
237: #define engine engine3
238: #define VARIANT(v) ((v)^0xffffffff)
239: #define JUMP(target) goto K_lit
240: #define LABEL(name) J_##name: asm(""); I_##name:
241: #else
242: #error illegal ENGINE value
243: #endif /* ENGINE */
244:
245: /* the asm(""); is there to get a stop compiled on Itanium */
246: #define LABEL2(name) K_##name: asm("");
247:
248: Label *engine(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0)
249: /* executes code at ip, if ip!=NULL
250: returns array of machine code labels (for use in a loader), if ip==NULL
251: */
252: {
253: #ifndef GFORTH_DEBUGGING
254: register Cell *rp RPREG;
255: #endif
256: #ifndef NO_IP
257: register Xt *ip IPREG = ip0;
258: #endif
259: register Cell *sp SPREG = sp0;
260: register Float *fp FPREG = fp0;
261: register Address lp LPREG = lp0;
262: register Xt cfa CFAREG;
263: #ifdef MORE_VARS
264: MORE_VARS
265: #endif
266: #ifdef HAS_FFCALL
267: av_alist alist;
268: extern va_alist clist;
269: float frv;
270: int irv;
271: double drv;
272: long long llrv;
273: void * prv;
274: #endif
275: register Address up UPREG = UP;
276: register Cell MAYBE_UNUSED spa TOSREG;
277: register Cell MAYBE_UNUSED spb spaREG;
278: register Cell MAYBE_UNUSED spc spbREG;
279: IF_fpTOS(register Float fpTOS FTOSREG;)
280: #if defined(DOUBLY_INDIRECT)
281: static Label *symbols;
282: static void *routines[]= {
283: #define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0]))
284: #else /* !defined(DOUBLY_INDIRECT) */
285: static Label symbols[]= {
286: #define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0]))
287: #endif /* !defined(DOUBLY_INDIRECT) */
288: #define INST_ADDR(name) ((Label)&&I_##name)
289: #include "prim_lab.i"
290: #undef INST_ADDR
291: (Label)0,
292: #define INST_ADDR(name) ((Label)&&K_##name)
293: #include "prim_lab.i"
294: #undef INST_ADDR
295: #define INST_ADDR(name) ((Label)&&J_##name)
296: #include "prim_lab.i"
297: #undef INST_ADDR
298: (Label)&&after_last
299: };
300: #ifdef CPU_DEP2
301: CPU_DEP2
302: #endif
303:
304: rp = rp0;
305: #ifdef DEBUG
306: fprintf(stderr,"ip=%x, sp=%x, rp=%x, fp=%x, lp=%x, up=%x\n",
307: (unsigned)ip0,(unsigned)sp,(unsigned)rp,
308: (unsigned)fp,(unsigned)lp,(unsigned)up);
309: #endif
310:
311: if (ip0 == NULL) {
312: #if defined(DOUBLY_INDIRECT)
313: #define CODE_OFFSET (26*sizeof(Cell))
314: #define XT_OFFSET (22*sizeof(Cell))
315: int i;
316: Cell code_offset = offset_image? CODE_OFFSET : 0;
317: Cell xt_offset = offset_image? XT_OFFSET : 0;
318:
319: symbols = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+CODE_OFFSET)+code_offset);
320: xts = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+XT_OFFSET)+xt_offset);
321: for (i=0; i<DOESJUMP+1; i++)
322: xts[i] = symbols[i] = (Label)routines[i];
323: for (; routines[i]!=0; i++) {
324: if (i>=MAX_SYMBOLS) {
325: fprintf(stderr,"gforth-ditc: more than %ld primitives\n",(long)MAX_SYMBOLS);
326: exit(1);
327: }
328: xts[i] = symbols[i] = &routines[i];
329: }
330: #endif /* defined(DOUBLY_INDIRECT) */
331: return symbols;
332: }
333:
334: IF_spTOS(spTOS = sp[0]);
335: IF_fpTOS(fpTOS = fp[0]);
336: /* prep_terminal(); */
337: #ifdef NO_IP
338: goto *(*(Label *)ip0);
339: #else
340: SET_IP(ip);
341: SUPER_END; /* count the first block, too */
342: NEXT;
343: #endif
344:
345: #ifdef CPU_DEP3
346: CPU_DEP3
347: #endif
348:
349: #include "prim.i"
350: after_last: return (Label *)0;
351: /*needed only to get the length of the last primitive */
352: }
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