Annotation of gforth/engine/engine.c, revision 1.114
1.1 anton 1: /* Gforth virtual machine (aka inner interpreter)
2:
1.113 anton 3: Copyright (C) 1995,1996,1997,1998,2000,2003,2004,2005,2006,2007,2008,2010 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
1.105 anton 9: as published by the Free Software Foundation, either version 3
1.1 anton 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
1.105 anton 18: along with this program; if not, see http://www.gnu.org/licenses/.
1.1 anton 19: */
20:
1.72 anton 21: #if defined(GFORTH_DEBUGGING) || defined(INDIRECT_THREADED) || defined(DOUBLY_INDIRECT) || defined(VM_PROFILING)
1.68 anton 22: #define USE_NO_TOS
1.72 anton 23: #else
24: #define USE_TOS
25: #endif
1.68 anton 26:
1.1 anton 27: #include "config.h"
1.31 pazsan 28: #include "forth.h"
1.1 anton 29: #include <ctype.h>
30: #include <stdio.h>
31: #include <string.h>
32: #include <math.h>
1.4 pazsan 33: #include <assert.h>
34: #include <stdlib.h>
35: #include <errno.h>
36: #include "io.h"
37: #include "threaded.h"
38: #ifndef STANDALONE
1.1 anton 39: #include <sys/types.h>
40: #include <sys/stat.h>
41: #include <fcntl.h>
42: #include <time.h>
43: #include <sys/time.h>
44: #include <unistd.h>
45: #include <pwd.h>
1.17 pazsan 46: #include <dirent.h>
1.110 anton 47: #ifdef HAVE_WCHAR_H
1.89 pazsan 48: #include <wchar.h>
1.110 anton 49: #endif
1.21 anton 50: #include <sys/resource.h>
1.19 anton 51: #ifdef HAVE_FNMATCH_H
1.18 anton 52: #include <fnmatch.h>
1.19 anton 53: #else
54: #include "fnmatch.h"
55: #endif
1.4 pazsan 56: #else
1.96 pazsan 57: /* #include <systypes.h> */
1.4 pazsan 58: #endif
1.1 anton 59:
60: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN) /* what else? */
61: #include <dlfcn.h>
62: #endif
1.8 pazsan 63: #if defined(_WIN32)
64: #include <windows.h>
65: #endif
1.1 anton 66: #ifdef hpux
67: #include <dl.h>
68: #endif
69:
1.63 pazsan 70: #ifdef HAS_FFCALL
71: #include <avcall.h>
72: #include <callback.h>
73: #endif
74:
1.1 anton 75: #ifndef SEEK_SET
76: /* should be defined in stdio.h, but some systems don't have it */
77: #define SEEK_SET 0
78: #endif
79:
1.53 anton 80: #ifndef HAVE_FSEEKO
81: #define fseeko fseek
82: #endif
83:
84: #ifndef HAVE_FTELLO
85: #define ftello ftell
86: #endif
87:
1.1 anton 88: #define NULLC '\0'
89:
1.14 pazsan 90: #ifdef MEMCMP_AS_SUBROUTINE
91: extern int gforth_memcmp(const char * s1, const char * s2, size_t n);
1.15 anton 92: #define memcmp(s1,s2,n) gforth_memcmp(s1,s2,n)
1.14 pazsan 93: #endif
94:
1.1 anton 95: #define NEWLINE '\n'
1.94 anton 96:
97: /* These two flags control whether divisions are checked by software.
98: The CHECK_DIVISION_SW is for those cases where the event is a
99: division by zero or overflow on the C level, and might be reported
100: by hardware; we might check forr that in autoconf and set the
101: switch appropriately, but currently don't. The CHECK_DIVISION flag
102: is for the other cases. */
103: #ifdef GFORTH_DEBUGGING
104: #define CHECK_DIVISION_SW 1
1.91 anton 105: #define CHECK_DIVISION 1
1.94 anton 106: #else
107: #define CHECK_DIVISION_SW 0
108: #define CHECK_DIVISION 0
109: #endif
1.1 anton 110:
1.26 anton 111: /* conversion on fetch */
112:
1.41 anton 113: #define vm_Cell2f(_cell,_x) ((_x)=(Bool)(_cell))
114: #define vm_Cell2c(_cell,_x) ((_x)=(Char)(_cell))
115: #define vm_Cell2n(_cell,_x) ((_x)=(Cell)(_cell))
116: #define vm_Cell2w(_cell,_x) ((_x)=(Cell)(_cell))
117: #define vm_Cell2u(_cell,_x) ((_x)=(UCell)(_cell))
118: #define vm_Cell2a_(_cell,_x) ((_x)=(Cell *)(_cell))
119: #define vm_Cell2c_(_cell,_x) ((_x)=(Char *)(_cell))
120: #define vm_Cell2f_(_cell,_x) ((_x)=(Float *)(_cell))
121: #define vm_Cell2df_(_cell,_x) ((_x)=(DFloat *)(_cell))
122: #define vm_Cell2sf_(_cell,_x) ((_x)=(SFloat *)(_cell))
123: #define vm_Cell2xt(_cell,_x) ((_x)=(Xt)(_cell))
124: #define vm_Cell2f83name(_cell,_x) ((_x)=(struct F83Name *)(_cell))
125: #define vm_Cell2longname(_cell,_x) ((_x)=(struct Longname *)(_cell))
126: #define vm_Float2r(_float,_x) (_x=_float)
1.26 anton 127:
128: /* conversion on store */
129:
1.41 anton 130: #define vm_f2Cell(_x,_cell) ((_cell)=(Cell)(_x))
131: #define vm_c2Cell(_x,_cell) ((_cell)=(Cell)(_x))
132: #define vm_n2Cell(_x,_cell) ((_cell)=(Cell)(_x))
133: #define vm_w2Cell(_x,_cell) ((_cell)=(Cell)(_x))
134: #define vm_u2Cell(_x,_cell) ((_cell)=(Cell)(_x))
135: #define vm_a_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
136: #define vm_c_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
137: #define vm_f_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
138: #define vm_df_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
139: #define vm_sf_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
140: #define vm_xt2Cell(_x,_cell) ((_cell)=(Cell)(_x))
141: #define vm_f83name2Cell(_x,_cell) ((_cell)=(Cell)(_x))
142: #define vm_longname2Cell(_x,_cell) ((_cell)=(Cell)(_x))
143: #define vm_r2Float(_x,_float) (_float=_x)
1.26 anton 144:
1.41 anton 145: #define vm_Cell2Cell(_x,_y) (_y=_x)
1.29 anton 146:
1.46 anton 147: #ifdef NO_IP
148: #define IMM_ARG(access,value) (VARIANT(value))
149: #else
150: #define IMM_ARG(access,value) (access)
151: #endif
152:
1.1 anton 153: /* if machine.h has not defined explicit registers, define them as implicit */
154: #ifndef IPREG
155: #define IPREG
156: #endif
157: #ifndef SPREG
158: #define SPREG
159: #endif
160: #ifndef RPREG
161: #define RPREG
162: #endif
163: #ifndef FPREG
164: #define FPREG
165: #endif
166: #ifndef LPREG
167: #define LPREG
168: #endif
1.79 pazsan 169: #ifndef CAREG
170: #define CAREG
171: #endif
1.1 anton 172: #ifndef CFAREG
173: #define CFAREG
174: #endif
175: #ifndef UPREG
176: #define UPREG
177: #endif
178: #ifndef TOSREG
179: #define TOSREG
180: #endif
1.69 anton 181: #ifndef spbREG
182: #define spbREG
183: #endif
1.74 anton 184: #ifndef spcREG
185: #define spcREG
186: #endif
1.80 anton 187: #ifndef spdREG
188: #define spdREG
189: #endif
190: #ifndef speREG
191: #define speREG
192: #endif
1.81 anton 193: #ifndef spfREG
194: #define spfREG
195: #endif
196: #ifndef spgREG
197: #define spgREG
198: #endif
199: #ifndef sphREG
200: #define sphREG
201: #endif
1.1 anton 202: #ifndef FTOSREG
203: #define FTOSREG
204: #endif
205:
206: #ifndef CPU_DEP1
207: # define CPU_DEP1 0
208: #endif
209:
1.62 anton 210: /* instructions containing SUPER_END must be the last instruction of a
1.28 anton 211: super-instruction (e.g., branches, EXECUTE, and other instructions
212: ending the basic block). Instructions containing SET_IP get this
213: automatically, so you usually don't have to write it. If you have
214: to write it, write it after IP points to the next instruction.
215: Used for profiling. Don't write it in a word containing SET_IP, or
216: the following block will be counted twice. */
217: #ifdef VM_PROFILING
218: #define SUPER_END vm_count_block(IP)
219: #else
220: #define SUPER_END
221: #endif
1.35 anton 222: #define SUPER_CONTINUE
1.46 anton 223:
1.98 anton 224: #ifdef ASMCOMMENT
225: /* an individualized asm statement so that (hopefully) gcc's optimizer
226: does not do cross-jumping */
227: #define asmcomment(string) asm(ASMCOMMENT string)
228: #else
229: /* we don't know how to do an asm comment, so we just do an empty asm */
230: #define asmcomment(string) asm("")
231: #endif
232:
1.114 ! pazsan 233: #define DEPTHOFF 4
1.66 anton 234: #ifdef GFORTH_DEBUGGING
1.70 anton 235: #if DEBUG
1.114 ! pazsan 236: #define NAME(string) { saved_ip=ip; asmcomment(string); fprintf(stderr,"%08lx depth=%3ld tos=%016lx: "string"\n",(Cell)ip,sp0+DEPTHOFF-sp,sp[0]);}
1.70 anton 237: #else /* !DEBUG */
1.66 anton 238: #define NAME(string) { saved_ip=ip; asm(""); }
239: /* the asm here is to avoid reordering of following stuff above the
240: assignment; this is an old-style asm (no operands), and therefore
241: is treated like "asm volatile ..."; i.e., it prevents most
242: reorderings across itself. We want the assignment above first,
243: because the stack loads may already cause a stack underflow. */
1.70 anton 244: #endif /* !DEBUG */
1.66 anton 245: #elif DEBUG
1.114 ! pazsan 246: # define NAME(string) {Cell __depth=sp0+DEPTHOFF-sp; int i; fprintf(stderr,"%08lx depth=%3ld: "string,(Cell)ip,sp0+DEPTHOFF-sp); for (i=__depth-1; i>0; i--) fprintf(stderr, " $%lx",sp[i]); fprintf(stderr, " $%lx\n",spTOS); }
1.66 anton 247: #else
1.98 anton 248: # define NAME(string) asmcomment(string);
1.66 anton 249: #endif
250:
1.37 pazsan 251: #ifdef DEBUG
252: #define CFA_TO_NAME(__cfa) \
253: Cell len, i; \
254: char * name = __cfa; \
255: for(i=0; i<32; i+=sizeof(Cell)) { \
256: len = ((Cell*)name)[-1]; \
257: if(len < 0) { \
258: len &= 0x1F; \
259: if((len+sizeof(Cell)) > i) break; \
260: } len = 0; \
261: name -= sizeof(Cell); \
262: }
263: #endif
1.30 anton 264:
1.101 pazsan 265: #ifdef STANDALONE
266: jmp_buf throw_jmp_buf;
267:
268: void throw(int code)
269: {
270: longjmp(throw_jmp_buf,code); /* !! or use siglongjmp ? */
271: }
272: #endif
273:
1.85 pazsan 274: #if defined(HAS_FFCALL) || defined(HAS_LIBFFI)
1.88 pazsan 275: #define SAVE_REGS IF_fpTOS(fp[0]=fpTOS); gforth_SP=sp; gforth_FP=fp; gforth_RP=rp; gforth_LP=lp;
276: #define REST_REGS sp=gforth_SP; fp=gforth_FP; rp=gforth_RP; lp=gforth_LP; IF_fpTOS(fpTOS=fp[0]);
1.63 pazsan 277: #endif
278:
1.50 anton 279: #if !defined(ENGINE)
280: /* normal engine */
281: #define VARIANT(v) (v)
282: #define JUMP(target) goto I_noop
1.82 anton 283: #define LABEL(name) H_##name: asm(""); I_##name:
1.100 anton 284: #define LABEL3(name) J_##name: asm("");
1.50 anton 285:
286: #elif ENGINE==2
287: /* variant with padding between VM instructions for finding out
288: cross-inst jumps (for dynamic code) */
1.90 pazsan 289: #define gforth_engine gforth_engine2
1.50 anton 290: #define VARIANT(v) (v)
291: #define JUMP(target) goto I_noop
1.78 anton 292: #define LABEL(name) H_##name: SKIP16; I_##name:
1.100 anton 293: /* the SKIP16 after LABEL3 is there, because the ARM gcc may place
294: some constants after the final branch, and may refer to them from
295: the code before label3. Since we don't copy the constants, we have
296: to make sure that such code is recognized as non-relocatable. */
297: #define LABEL3(name) J_##name: SKIP16;
1.50 anton 298:
299: #elif ENGINE==3
300: /* variant with different immediate arguments for finding out
301: immediate arguments (for native code) */
1.90 pazsan 302: #define gforth_engine gforth_engine3
1.50 anton 303: #define VARIANT(v) ((v)^0xffffffff)
304: #define JUMP(target) goto K_lit
1.83 anton 305: #define LABEL(name) H_##name: asm(""); I_##name:
1.100 anton 306: #define LABEL3(name) J_##name: asm("");
1.50 anton 307: #else
308: #error illegal ENGINE value
309: #endif /* ENGINE */
310:
1.67 anton 311: /* the asm(""); is there to get a stop compiled on Itanium */
312: #define LABEL2(name) K_##name: asm("");
1.50 anton 313:
1.106 anton 314: Label *gforth_engine(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0 sr_proto)
1.1 anton 315: /* executes code at ip, if ip!=NULL
316: returns array of machine code labels (for use in a loader), if ip==NULL
317: */
318: {
1.107 anton 319: #if defined(GFORTH_DEBUGGING)
320: #if defined(GLOBALS_NONRELOC)
321: register saved_regs *saved_regs_p TOSREG = saved_regs_p0;
322: #endif /* defined(GLOBALS_NONRELOC) */
323: #else /* !defined(GFORTH_DEBUGGING) */
1.10 anton 324: register Cell *rp RPREG;
1.107 anton 325: #endif /* !defined(GFORTH_DEBUGGING) */
1.46 anton 326: #ifndef NO_IP
327: register Xt *ip IPREG = ip0;
328: #endif
1.1 anton 329: register Cell *sp SPREG = sp0;
330: register Float *fp FPREG = fp0;
331: register Address lp LPREG = lp0;
332: register Xt cfa CFAREG;
1.79 pazsan 333: register Label real_ca CAREG;
1.11 anton 334: #ifdef MORE_VARS
335: MORE_VARS
1.63 pazsan 336: #endif
337: #ifdef HAS_FFCALL
338: av_alist alist;
1.90 pazsan 339: extern va_alist gforth_clist;
1.63 pazsan 340: float frv;
341: int irv;
342: double drv;
343: long long llrv;
344: void * prv;
1.84 pazsan 345: #endif
1.88 pazsan 346: register Address up UPREG = gforth_UP;
1.107 anton 347: #if !defined(GFORTH_DEBUGGING)
1.80 anton 348: register Cell MAYBE_UNUSED spTOS TOSREG;
1.74 anton 349: register Cell MAYBE_UNUSED spb spbREG;
350: register Cell MAYBE_UNUSED spc spcREG;
1.80 anton 351: register Cell MAYBE_UNUSED spd spdREG;
352: register Cell MAYBE_UNUSED spe speREG;
1.112 anton 353: register Cell MAYBE_UNUSED spf spfREG;
354: register Cell MAYBE_UNUSED spg spgREG;
355: register Cell MAYBE_UNUSED sph sphREG;
1.24 anton 356: IF_fpTOS(register Float fpTOS FTOSREG;)
1.107 anton 357: #endif /* !defined(GFORTH_DEBUGGING) */
1.1 anton 358: #if defined(DOUBLY_INDIRECT)
359: static Label *symbols;
360: static void *routines[]= {
1.27 anton 361: #define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0]))
1.1 anton 362: #else /* !defined(DOUBLY_INDIRECT) */
363: static Label symbols[]= {
1.27 anton 364: #define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0]))
1.1 anton 365: #endif /* !defined(DOUBLY_INDIRECT) */
1.55 anton 366: #define INST_ADDR(name) ((Label)&&I_##name)
1.71 anton 367: #include PRIM_LAB_I
1.34 anton 368: #undef INST_ADDR
369: (Label)0,
1.55 anton 370: #define INST_ADDR(name) ((Label)&&K_##name)
1.71 anton 371: #include PRIM_LAB_I
1.46 anton 372: #undef INST_ADDR
1.55 anton 373: #define INST_ADDR(name) ((Label)&&J_##name)
1.71 anton 374: #include PRIM_LAB_I
1.34 anton 375: #undef INST_ADDR
1.76 anton 376: (Label)&&after_last,
377: (Label)&&before_goto,
1.78 anton 378: (Label)&&after_goto,
379: /* just mention the H_ labels, so the SKIP16s are not optimized away */
380: #define INST_ADDR(name) ((Label)&&H_##name)
381: #include PRIM_LAB_I
382: #undef INST_ADDR
1.1 anton 383: };
1.99 pazsan 384: #ifdef STANDALONE
1.97 pazsan 385: #define INST_ADDR(name) ((Label)&&I_##name)
386: #include "image.i"
387: #undef INST_ADDR
388: #endif
1.1 anton 389: #ifdef CPU_DEP2
390: CPU_DEP2
391: #endif
392:
1.10 anton 393: rp = rp0;
1.1 anton 394: #ifdef DEBUG
395: fprintf(stderr,"ip=%x, sp=%x, rp=%x, fp=%x, lp=%x, up=%x\n",
1.46 anton 396: (unsigned)ip0,(unsigned)sp,(unsigned)rp,
1.1 anton 397: (unsigned)fp,(unsigned)lp,(unsigned)up);
398: #endif
399:
1.46 anton 400: if (ip0 == NULL) {
1.1 anton 401: #if defined(DOUBLY_INDIRECT)
1.38 anton 402: #define CODE_OFFSET (26*sizeof(Cell))
403: #define XT_OFFSET (22*sizeof(Cell))
1.1 anton 404: int i;
1.3 anton 405: Cell code_offset = offset_image? CODE_OFFSET : 0;
1.38 anton 406: Cell xt_offset = offset_image? XT_OFFSET : 0;
1.7 pazsan 407:
1.3 anton 408: symbols = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+CODE_OFFSET)+code_offset);
1.38 anton 409: xts = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+XT_OFFSET)+xt_offset);
1.111 dvdkhlng 410: for (i=0; i<DOER_MAX+1; i++)
1.38 anton 411: xts[i] = symbols[i] = (Label)routines[i];
1.1 anton 412: for (; routines[i]!=0; i++) {
413: if (i>=MAX_SYMBOLS) {
1.60 anton 414: fprintf(stderr,"gforth-ditc: more than %ld primitives\n",(long)MAX_SYMBOLS);
1.1 anton 415: exit(1);
1.20 anton 416: }
1.38 anton 417: xts[i] = symbols[i] = &routines[i];
1.1 anton 418: }
1.20 anton 419: #endif /* defined(DOUBLY_INDIRECT) */
1.99 pazsan 420: #ifdef STANDALONE
421: return image;
422: #else
1.20 anton 423: return symbols;
1.99 pazsan 424: #endif
1.7 pazsan 425: }
1.1 anton 426:
1.81 anton 427: #if !(defined(GFORTH_DEBUGGING) || defined(INDIRECT_THREADED) || defined(DOUBLY_INDIRECT) || defined(VM_PROFILING))
1.80 anton 428: sp += STACK_CACHE_DEFAULT-1;
1.81 anton 429: /* some of those registers are dead, but its simpler to initialize them all */ spTOS = sp[0];
1.80 anton 430: spb = sp[-1];
431: spc = sp[-2];
432: spd = sp[-3];
433: spe = sp[-4];
1.81 anton 434: spf = sp[-5];
435: spg = sp[-6];
436: sph = sp[-7];
1.80 anton 437: #endif
438:
1.24 anton 439: IF_fpTOS(fpTOS = fp[0]);
1.7 pazsan 440: /* prep_terminal(); */
1.46 anton 441: #ifdef NO_IP
442: goto *(*(Label *)ip0);
1.79 pazsan 443: before_goto:
444: goto *real_ca;
445: after_goto:;
1.46 anton 446: #else
1.11 anton 447: SET_IP(ip);
1.28 anton 448: SUPER_END; /* count the first block, too */
1.79 pazsan 449: FIRST_NEXT;
1.46 anton 450: #endif
1.11 anton 451:
1.1 anton 452: #ifdef CPU_DEP3
453: CPU_DEP3
1.46 anton 454: #endif
1.76 anton 455:
1.78 anton 456: #include PRIM_I
457: after_last: return (Label *)0;
458: /*needed only to get the length of the last primitive */
459:
460: return (Label *)0;
1.50 anton 461: }
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