Annotation of gforth/engine/engine.c, revision 1.75
1.1 anton 1: /* Gforth virtual machine (aka inner interpreter)
2:
1.75 ! anton 3: Copyright (C) 1995,1996,1997,1998,2000,2003,2004 Free Software Foundation, Inc.
1.1 anton 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
1.23 anton 19: Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
1.1 anton 20: */
21:
1.72 anton 22: #if defined(GFORTH_DEBUGGING) || defined(INDIRECT_THREADED) || defined(DOUBLY_INDIRECT) || defined(VM_PROFILING)
1.68 anton 23: #define USE_NO_TOS
1.72 anton 24: #else
25: #define USE_TOS
26: #endif
1.68 anton 27: #define USE_NO_FTOS
28:
1.1 anton 29: #include "config.h"
1.31 pazsan 30: #include "forth.h"
1.1 anton 31: #include <ctype.h>
32: #include <stdio.h>
33: #include <string.h>
34: #include <math.h>
1.4 pazsan 35: #include <assert.h>
36: #include <stdlib.h>
37: #include <errno.h>
38: #include "io.h"
39: #include "threaded.h"
40: #ifndef STANDALONE
1.1 anton 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>
1.17 pazsan 48: #include <dirent.h>
1.21 anton 49: #include <sys/resource.h>
1.19 anton 50: #ifdef HAVE_FNMATCH_H
1.18 anton 51: #include <fnmatch.h>
1.19 anton 52: #else
53: #include "fnmatch.h"
54: #endif
1.4 pazsan 55: #else
56: #include "systypes.h"
57: #endif
1.1 anton 58:
59: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN) /* what else? */
60: #include <dlfcn.h>
61: #endif
1.8 pazsan 62: #if defined(_WIN32)
63: #include <windows.h>
64: #endif
1.1 anton 65: #ifdef hpux
66: #include <dl.h>
67: #endif
68:
1.63 pazsan 69: #ifdef HAS_FFCALL
70: #include <avcall.h>
71: #include <callback.h>
72: #endif
73:
1.1 anton 74: #ifndef SEEK_SET
75: /* should be defined in stdio.h, but some systems don't have it */
76: #define SEEK_SET 0
77: #endif
78:
1.53 anton 79: #ifndef HAVE_FSEEKO
80: #define fseeko fseek
81: #endif
82:
83: #ifndef HAVE_FTELLO
84: #define ftello ftell
85: #endif
86:
1.1 anton 87: #define NULLC '\0'
88:
1.14 pazsan 89: #ifdef MEMCMP_AS_SUBROUTINE
90: extern int gforth_memcmp(const char * s1, const char * s2, size_t n);
1.15 anton 91: #define memcmp(s1,s2,n) gforth_memcmp(s1,s2,n)
1.14 pazsan 92: #endif
93:
1.1 anton 94: #define NEWLINE '\n'
95:
1.26 anton 96: /* conversion on fetch */
97:
1.41 anton 98: #define vm_Cell2f(_cell,_x) ((_x)=(Bool)(_cell))
99: #define vm_Cell2c(_cell,_x) ((_x)=(Char)(_cell))
100: #define vm_Cell2n(_cell,_x) ((_x)=(Cell)(_cell))
101: #define vm_Cell2w(_cell,_x) ((_x)=(Cell)(_cell))
102: #define vm_Cell2u(_cell,_x) ((_x)=(UCell)(_cell))
103: #define vm_Cell2a_(_cell,_x) ((_x)=(Cell *)(_cell))
104: #define vm_Cell2c_(_cell,_x) ((_x)=(Char *)(_cell))
105: #define vm_Cell2f_(_cell,_x) ((_x)=(Float *)(_cell))
106: #define vm_Cell2df_(_cell,_x) ((_x)=(DFloat *)(_cell))
107: #define vm_Cell2sf_(_cell,_x) ((_x)=(SFloat *)(_cell))
108: #define vm_Cell2xt(_cell,_x) ((_x)=(Xt)(_cell))
109: #define vm_Cell2f83name(_cell,_x) ((_x)=(struct F83Name *)(_cell))
110: #define vm_Cell2longname(_cell,_x) ((_x)=(struct Longname *)(_cell))
111: #define vm_Float2r(_float,_x) (_x=_float)
1.26 anton 112:
113: /* conversion on store */
114:
1.41 anton 115: #define vm_f2Cell(_x,_cell) ((_cell)=(Cell)(_x))
116: #define vm_c2Cell(_x,_cell) ((_cell)=(Cell)(_x))
117: #define vm_n2Cell(_x,_cell) ((_cell)=(Cell)(_x))
118: #define vm_w2Cell(_x,_cell) ((_cell)=(Cell)(_x))
119: #define vm_u2Cell(_x,_cell) ((_cell)=(Cell)(_x))
120: #define vm_a_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
121: #define vm_c_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
122: #define vm_f_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
123: #define vm_df_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
124: #define vm_sf_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
125: #define vm_xt2Cell(_x,_cell) ((_cell)=(Cell)(_x))
126: #define vm_f83name2Cell(_x,_cell) ((_cell)=(Cell)(_x))
127: #define vm_longname2Cell(_x,_cell) ((_cell)=(Cell)(_x))
128: #define vm_r2Float(_x,_float) (_float=_x)
1.26 anton 129:
1.41 anton 130: #define vm_Cell2Cell(_x,_y) (_y=_x)
1.29 anton 131:
1.46 anton 132: #ifdef NO_IP
133: #define IMM_ARG(access,value) (VARIANT(value))
134: #else
135: #define IMM_ARG(access,value) (access)
136: #endif
137:
1.1 anton 138: /* if machine.h has not defined explicit registers, define them as implicit */
139: #ifndef IPREG
140: #define IPREG
141: #endif
142: #ifndef SPREG
143: #define SPREG
144: #endif
145: #ifndef RPREG
146: #define RPREG
147: #endif
148: #ifndef FPREG
149: #define FPREG
150: #endif
151: #ifndef LPREG
152: #define LPREG
153: #endif
154: #ifndef CFAREG
155: #define CFAREG
156: #endif
157: #ifndef UPREG
158: #define UPREG
159: #endif
160: #ifndef TOSREG
161: #define TOSREG
162: #endif
1.69 anton 163: #ifndef spbREG
164: #define spbREG
165: #endif
1.74 anton 166: #ifndef spcREG
167: #define spcREG
168: #endif
1.1 anton 169: #ifndef FTOSREG
170: #define FTOSREG
171: #endif
172:
173: #ifndef CPU_DEP1
174: # define CPU_DEP1 0
175: #endif
176:
1.62 anton 177: /* instructions containing SUPER_END must be the last instruction of a
1.28 anton 178: super-instruction (e.g., branches, EXECUTE, and other instructions
179: ending the basic block). Instructions containing SET_IP get this
180: automatically, so you usually don't have to write it. If you have
181: to write it, write it after IP points to the next instruction.
182: Used for profiling. Don't write it in a word containing SET_IP, or
183: the following block will be counted twice. */
184: #ifdef VM_PROFILING
185: #define SUPER_END vm_count_block(IP)
186: #else
187: #define SUPER_END
188: #endif
1.35 anton 189: #define SUPER_CONTINUE
1.46 anton 190:
1.66 anton 191: #ifdef GFORTH_DEBUGGING
1.70 anton 192: #if DEBUG
1.73 pazsan 193: #define NAME(string) { saved_ip=ip; asm("# "string); fprintf(stderr,"%08lx depth=%3ld: "string"\n",(Cell)ip,sp0+3-sp);}
1.70 anton 194: #else /* !DEBUG */
1.66 anton 195: #define NAME(string) { saved_ip=ip; asm(""); }
196: /* the asm here is to avoid reordering of following stuff above the
197: assignment; this is an old-style asm (no operands), and therefore
198: is treated like "asm volatile ..."; i.e., it prevents most
199: reorderings across itself. We want the assignment above first,
200: because the stack loads may already cause a stack underflow. */
1.70 anton 201: #endif /* !DEBUG */
1.66 anton 202: #elif DEBUG
1.72 anton 203: # 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); }
1.66 anton 204: #else
1.73 pazsan 205: # define NAME(string) asm("# "string);
1.66 anton 206: #endif
207:
1.37 pazsan 208: #ifdef DEBUG
209: #define CFA_TO_NAME(__cfa) \
210: Cell len, i; \
211: char * name = __cfa; \
212: for(i=0; i<32; i+=sizeof(Cell)) { \
213: len = ((Cell*)name)[-1]; \
214: if(len < 0) { \
215: len &= 0x1F; \
216: if((len+sizeof(Cell)) > i) break; \
217: } len = 0; \
218: name -= sizeof(Cell); \
219: }
220: #endif
1.30 anton 221:
1.63 pazsan 222: #ifdef HAS_FFCALL
223: #define SAVE_REGS IF_spTOS(sp[0]=spTOS); IF_fpTOS(fp[0]=fpTOS); SP=sp; FP=fp; RP=rp; LP=lp;
224: #define REST_REGS sp=SP; fp=FP; rp=RP; lp=LP; IF_spTOS(spTOS=sp[0]); IF_fpTOS(fpTOS=fp[0]);
225: #endif
226:
1.50 anton 227: #if !defined(ENGINE)
228: /* normal engine */
229: #define VARIANT(v) (v)
230: #define JUMP(target) goto I_noop
1.51 anton 231: #define LABEL(name) J_##name: asm(""); I_##name:
1.50 anton 232:
233: #elif ENGINE==2
234: /* variant with padding between VM instructions for finding out
235: cross-inst jumps (for dynamic code) */
236: #define engine engine2
237: #define VARIANT(v) (v)
238: #define JUMP(target) goto I_noop
1.52 anton 239: #define LABEL(name) J_##name: SKIP16; I_##name:
1.50 anton 240: #define IN_ENGINE2
241:
242: #elif ENGINE==3
243: /* variant with different immediate arguments for finding out
244: immediate arguments (for native code) */
245: #define engine engine3
246: #define VARIANT(v) ((v)^0xffffffff)
247: #define JUMP(target) goto K_lit
1.51 anton 248: #define LABEL(name) J_##name: asm(""); I_##name:
1.50 anton 249: #else
250: #error illegal ENGINE value
251: #endif /* ENGINE */
252:
1.67 anton 253: /* the asm(""); is there to get a stop compiled on Itanium */
254: #define LABEL2(name) K_##name: asm("");
1.50 anton 255:
256: Label *engine(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0)
1.1 anton 257: /* executes code at ip, if ip!=NULL
258: returns array of machine code labels (for use in a loader), if ip==NULL
259: */
260: {
1.10 anton 261: #ifndef GFORTH_DEBUGGING
262: register Cell *rp RPREG;
263: #endif
1.46 anton 264: #ifndef NO_IP
265: register Xt *ip IPREG = ip0;
266: #endif
1.1 anton 267: register Cell *sp SPREG = sp0;
268: register Float *fp FPREG = fp0;
269: register Address lp LPREG = lp0;
270: register Xt cfa CFAREG;
1.11 anton 271: #ifdef MORE_VARS
272: MORE_VARS
1.63 pazsan 273: #endif
274: #ifdef HAS_FFCALL
275: av_alist alist;
276: extern va_alist clist;
277: float frv;
278: int irv;
279: double drv;
280: long long llrv;
281: void * prv;
1.11 anton 282: #endif
1.1 anton 283: register Address up UPREG = UP;
1.72 anton 284: IF_spTOS(register Cell MAYBE_UNUSED spTOS TOSREG;)
1.74 anton 285: register Cell MAYBE_UNUSED spb spbREG;
286: register Cell MAYBE_UNUSED spc spcREG;
1.24 anton 287: IF_fpTOS(register Float fpTOS FTOSREG;)
1.1 anton 288: #if defined(DOUBLY_INDIRECT)
289: static Label *symbols;
290: static void *routines[]= {
1.27 anton 291: #define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0]))
1.1 anton 292: #else /* !defined(DOUBLY_INDIRECT) */
293: static Label symbols[]= {
1.27 anton 294: #define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0]))
1.1 anton 295: #endif /* !defined(DOUBLY_INDIRECT) */
1.55 anton 296: #define INST_ADDR(name) ((Label)&&I_##name)
1.71 anton 297: #include PRIM_LAB_I
1.34 anton 298: #undef INST_ADDR
299: (Label)0,
1.55 anton 300: #define INST_ADDR(name) ((Label)&&K_##name)
1.71 anton 301: #include PRIM_LAB_I
1.46 anton 302: #undef INST_ADDR
1.55 anton 303: #define INST_ADDR(name) ((Label)&&J_##name)
1.71 anton 304: #include PRIM_LAB_I
1.34 anton 305: #undef INST_ADDR
1.64 anton 306: (Label)&&after_last
1.1 anton 307: };
308: #ifdef CPU_DEP2
309: CPU_DEP2
310: #endif
311:
1.10 anton 312: rp = rp0;
1.1 anton 313: #ifdef DEBUG
314: fprintf(stderr,"ip=%x, sp=%x, rp=%x, fp=%x, lp=%x, up=%x\n",
1.46 anton 315: (unsigned)ip0,(unsigned)sp,(unsigned)rp,
1.1 anton 316: (unsigned)fp,(unsigned)lp,(unsigned)up);
317: #endif
318:
1.46 anton 319: if (ip0 == NULL) {
1.1 anton 320: #if defined(DOUBLY_INDIRECT)
1.38 anton 321: #define CODE_OFFSET (26*sizeof(Cell))
322: #define XT_OFFSET (22*sizeof(Cell))
1.1 anton 323: int i;
1.3 anton 324: Cell code_offset = offset_image? CODE_OFFSET : 0;
1.38 anton 325: Cell xt_offset = offset_image? XT_OFFSET : 0;
1.7 pazsan 326:
1.3 anton 327: symbols = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+CODE_OFFSET)+code_offset);
1.38 anton 328: xts = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+XT_OFFSET)+xt_offset);
1.1 anton 329: for (i=0; i<DOESJUMP+1; i++)
1.38 anton 330: xts[i] = symbols[i] = (Label)routines[i];
1.1 anton 331: for (; routines[i]!=0; i++) {
332: if (i>=MAX_SYMBOLS) {
1.60 anton 333: fprintf(stderr,"gforth-ditc: more than %ld primitives\n",(long)MAX_SYMBOLS);
1.1 anton 334: exit(1);
1.20 anton 335: }
1.38 anton 336: xts[i] = symbols[i] = &routines[i];
1.1 anton 337: }
1.20 anton 338: #endif /* defined(DOUBLY_INDIRECT) */
339: return symbols;
1.7 pazsan 340: }
1.1 anton 341:
1.24 anton 342: IF_spTOS(spTOS = sp[0]);
343: IF_fpTOS(fpTOS = fp[0]);
1.7 pazsan 344: /* prep_terminal(); */
1.46 anton 345: #ifdef NO_IP
346: goto *(*(Label *)ip0);
347: #else
1.11 anton 348: SET_IP(ip);
1.28 anton 349: SUPER_END; /* count the first block, too */
1.1 anton 350: NEXT;
1.46 anton 351: #endif
1.11 anton 352:
1.1 anton 353: #ifdef CPU_DEP3
354: CPU_DEP3
1.46 anton 355: #endif
1.1 anton 356:
1.71 anton 357: #include PRIM_I
1.34 anton 358: after_last: return (Label *)0;
359: /*needed only to get the length of the last primitive */
1.50 anton 360: }
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