Annotation of gforth/engine/engine.c, revision 1.67
1.1 anton 1: /* Gforth virtual machine (aka inner interpreter)
2:
1.61 anton 3: Copyright (C) 1995,1996,1997,1998,2000,2003 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:
22: #include "config.h"
1.31 pazsan 23: #include "forth.h"
1.1 anton 24: #include <ctype.h>
25: #include <stdio.h>
26: #include <string.h>
27: #include <math.h>
1.4 pazsan 28: #include <assert.h>
29: #include <stdlib.h>
30: #include <errno.h>
31: #include "io.h"
32: #include "threaded.h"
33: #ifndef STANDALONE
1.1 anton 34: #include <sys/types.h>
35: #include <sys/stat.h>
36: #include <fcntl.h>
37: #include <time.h>
38: #include <sys/time.h>
39: #include <unistd.h>
40: #include <pwd.h>
1.17 pazsan 41: #include <dirent.h>
1.21 anton 42: #include <sys/resource.h>
1.19 anton 43: #ifdef HAVE_FNMATCH_H
1.18 anton 44: #include <fnmatch.h>
1.19 anton 45: #else
46: #include "fnmatch.h"
47: #endif
1.4 pazsan 48: #else
49: #include "systypes.h"
50: #endif
1.1 anton 51:
52: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN) /* what else? */
53: #include <dlfcn.h>
54: #endif
1.8 pazsan 55: #if defined(_WIN32)
56: #include <windows.h>
57: #endif
1.1 anton 58: #ifdef hpux
59: #include <dl.h>
60: #endif
61:
1.63 pazsan 62: #ifdef HAS_FFCALL
63: #include <avcall.h>
64: #include <callback.h>
65: #endif
66:
1.1 anton 67: #ifndef SEEK_SET
68: /* should be defined in stdio.h, but some systems don't have it */
69: #define SEEK_SET 0
70: #endif
71:
1.53 anton 72: #ifndef HAVE_FSEEKO
73: #define fseeko fseek
74: #endif
75:
76: #ifndef HAVE_FTELLO
77: #define ftello ftell
78: #endif
79:
1.1 anton 80: #define NULLC '\0'
81:
1.14 pazsan 82: #ifdef MEMCMP_AS_SUBROUTINE
83: extern int gforth_memcmp(const char * s1, const char * s2, size_t n);
1.15 anton 84: #define memcmp(s1,s2,n) gforth_memcmp(s1,s2,n)
1.14 pazsan 85: #endif
86:
1.1 anton 87: #define NEWLINE '\n'
88:
1.26 anton 89: /* conversion on fetch */
90:
1.41 anton 91: #define vm_Cell2f(_cell,_x) ((_x)=(Bool)(_cell))
92: #define vm_Cell2c(_cell,_x) ((_x)=(Char)(_cell))
93: #define vm_Cell2n(_cell,_x) ((_x)=(Cell)(_cell))
94: #define vm_Cell2w(_cell,_x) ((_x)=(Cell)(_cell))
95: #define vm_Cell2u(_cell,_x) ((_x)=(UCell)(_cell))
96: #define vm_Cell2a_(_cell,_x) ((_x)=(Cell *)(_cell))
97: #define vm_Cell2c_(_cell,_x) ((_x)=(Char *)(_cell))
98: #define vm_Cell2f_(_cell,_x) ((_x)=(Float *)(_cell))
99: #define vm_Cell2df_(_cell,_x) ((_x)=(DFloat *)(_cell))
100: #define vm_Cell2sf_(_cell,_x) ((_x)=(SFloat *)(_cell))
101: #define vm_Cell2xt(_cell,_x) ((_x)=(Xt)(_cell))
102: #define vm_Cell2f83name(_cell,_x) ((_x)=(struct F83Name *)(_cell))
103: #define vm_Cell2longname(_cell,_x) ((_x)=(struct Longname *)(_cell))
104: #define vm_Float2r(_float,_x) (_x=_float)
1.26 anton 105:
106: /* conversion on store */
107:
1.41 anton 108: #define vm_f2Cell(_x,_cell) ((_cell)=(Cell)(_x))
109: #define vm_c2Cell(_x,_cell) ((_cell)=(Cell)(_x))
110: #define vm_n2Cell(_x,_cell) ((_cell)=(Cell)(_x))
111: #define vm_w2Cell(_x,_cell) ((_cell)=(Cell)(_x))
112: #define vm_u2Cell(_x,_cell) ((_cell)=(Cell)(_x))
113: #define vm_a_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
114: #define vm_c_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
115: #define vm_f_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
116: #define vm_df_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
117: #define vm_sf_2Cell(_x,_cell) ((_cell)=(Cell)(_x))
118: #define vm_xt2Cell(_x,_cell) ((_cell)=(Cell)(_x))
119: #define vm_f83name2Cell(_x,_cell) ((_cell)=(Cell)(_x))
120: #define vm_longname2Cell(_x,_cell) ((_cell)=(Cell)(_x))
121: #define vm_r2Float(_x,_float) (_float=_x)
1.26 anton 122:
1.41 anton 123: #define vm_Cell2Cell(_x,_y) (_y=_x)
1.29 anton 124:
1.46 anton 125: #ifdef NO_IP
126: #define IMM_ARG(access,value) (VARIANT(value))
127: #else
128: #define IMM_ARG(access,value) (access)
129: #endif
130:
1.1 anton 131: /* if machine.h has not defined explicit registers, define them as implicit */
132: #ifndef IPREG
133: #define IPREG
134: #endif
135: #ifndef SPREG
136: #define SPREG
137: #endif
138: #ifndef RPREG
139: #define RPREG
140: #endif
141: #ifndef FPREG
142: #define FPREG
143: #endif
144: #ifndef LPREG
145: #define LPREG
146: #endif
147: #ifndef CFAREG
148: #define CFAREG
149: #endif
150: #ifndef UPREG
151: #define UPREG
152: #endif
153: #ifndef TOSREG
154: #define TOSREG
155: #endif
156: #ifndef FTOSREG
157: #define FTOSREG
158: #endif
159:
160: #ifndef CPU_DEP1
161: # define CPU_DEP1 0
162: #endif
163:
1.62 anton 164: /* instructions containing SUPER_END must be the last instruction of a
1.28 anton 165: super-instruction (e.g., branches, EXECUTE, and other instructions
166: ending the basic block). Instructions containing SET_IP get this
167: automatically, so you usually don't have to write it. If you have
168: to write it, write it after IP points to the next instruction.
169: Used for profiling. Don't write it in a word containing SET_IP, or
170: the following block will be counted twice. */
171: #ifdef VM_PROFILING
172: #define SUPER_END vm_count_block(IP)
173: #else
174: #define SUPER_END
175: #endif
1.35 anton 176: #define SUPER_CONTINUE
1.46 anton 177:
1.66 anton 178: #ifdef GFORTH_DEBUGGING
179: #define NAME(string) { saved_ip=ip; asm(""); }
180: /* the asm here is to avoid reordering of following stuff above the
181: assignment; this is an old-style asm (no operands), and therefore
182: is treated like "asm volatile ..."; i.e., it prevents most
183: reorderings across itself. We want the assignment above first,
184: because the stack loads may already cause a stack underflow. */
185: #elif DEBUG
186: # define NAME(string) fprintf(stderr,"%08lx depth=%3ld: "string"\n",(Cell)ip,sp0+3-sp);
187: #else
188: # define NAME(string)
189: #endif
190:
1.37 pazsan 191: #ifdef DEBUG
192: #define CFA_TO_NAME(__cfa) \
193: Cell len, i; \
194: char * name = __cfa; \
195: for(i=0; i<32; i+=sizeof(Cell)) { \
196: len = ((Cell*)name)[-1]; \
197: if(len < 0) { \
198: len &= 0x1F; \
199: if((len+sizeof(Cell)) > i) break; \
200: } len = 0; \
201: name -= sizeof(Cell); \
202: }
203: #endif
1.30 anton 204:
1.63 pazsan 205: #ifdef HAS_FFCALL
206: #define SAVE_REGS IF_spTOS(sp[0]=spTOS); IF_fpTOS(fp[0]=fpTOS); SP=sp; FP=fp; RP=rp; LP=lp;
207: #define REST_REGS sp=SP; fp=FP; rp=RP; lp=LP; IF_spTOS(spTOS=sp[0]); IF_fpTOS(fpTOS=fp[0]);
208: #endif
209:
1.50 anton 210: #if !defined(ENGINE)
211: /* normal engine */
212: #define VARIANT(v) (v)
213: #define JUMP(target) goto I_noop
1.51 anton 214: #define LABEL(name) J_##name: asm(""); I_##name:
1.50 anton 215:
216: #elif ENGINE==2
217: /* variant with padding between VM instructions for finding out
218: cross-inst jumps (for dynamic code) */
219: #define engine engine2
220: #define VARIANT(v) (v)
221: #define JUMP(target) goto I_noop
1.52 anton 222: #define LABEL(name) J_##name: SKIP16; I_##name:
1.50 anton 223: #define IN_ENGINE2
224:
225: #elif ENGINE==3
226: /* variant with different immediate arguments for finding out
227: immediate arguments (for native code) */
228: #define engine engine3
229: #define VARIANT(v) ((v)^0xffffffff)
230: #define JUMP(target) goto K_lit
1.51 anton 231: #define LABEL(name) J_##name: asm(""); I_##name:
1.50 anton 232: #else
233: #error illegal ENGINE value
234: #endif /* ENGINE */
235:
1.67 ! anton 236: /* the asm(""); is there to get a stop compiled on Itanium */
! 237: #define LABEL2(name) K_##name: asm("");
1.50 anton 238:
239: Label *engine(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0)
1.1 anton 240: /* executes code at ip, if ip!=NULL
241: returns array of machine code labels (for use in a loader), if ip==NULL
242: */
243: {
1.10 anton 244: #ifndef GFORTH_DEBUGGING
245: register Cell *rp RPREG;
246: #endif
1.46 anton 247: #ifndef NO_IP
248: register Xt *ip IPREG = ip0;
249: #endif
1.1 anton 250: register Cell *sp SPREG = sp0;
251: register Float *fp FPREG = fp0;
252: register Address lp LPREG = lp0;
253: register Xt cfa CFAREG;
1.11 anton 254: #ifdef MORE_VARS
255: MORE_VARS
1.63 pazsan 256: #endif
257: #ifdef HAS_FFCALL
258: av_alist alist;
259: extern va_alist clist;
260: float frv;
261: int irv;
262: double drv;
263: long long llrv;
264: void * prv;
1.11 anton 265: #endif
1.1 anton 266: register Address up UPREG = UP;
1.24 anton 267: IF_spTOS(register Cell spTOS TOSREG;)
268: IF_fpTOS(register Float fpTOS FTOSREG;)
1.1 anton 269: #if defined(DOUBLY_INDIRECT)
270: static Label *symbols;
271: static void *routines[]= {
1.27 anton 272: #define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0]))
1.1 anton 273: #else /* !defined(DOUBLY_INDIRECT) */
274: static Label symbols[]= {
1.27 anton 275: #define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0]))
1.1 anton 276: #endif /* !defined(DOUBLY_INDIRECT) */
1.55 anton 277: #define INST_ADDR(name) ((Label)&&I_##name)
1.34 anton 278: #include "prim_lab.i"
279: #undef INST_ADDR
280: (Label)0,
1.55 anton 281: #define INST_ADDR(name) ((Label)&&K_##name)
1.46 anton 282: #include "prim_lab.i"
283: #undef INST_ADDR
1.55 anton 284: #define INST_ADDR(name) ((Label)&&J_##name)
1.1 anton 285: #include "prim_lab.i"
1.34 anton 286: #undef INST_ADDR
1.64 anton 287: (Label)&&after_last
1.1 anton 288: };
289: #ifdef CPU_DEP2
290: CPU_DEP2
291: #endif
292:
1.10 anton 293: rp = rp0;
1.1 anton 294: #ifdef DEBUG
295: fprintf(stderr,"ip=%x, sp=%x, rp=%x, fp=%x, lp=%x, up=%x\n",
1.46 anton 296: (unsigned)ip0,(unsigned)sp,(unsigned)rp,
1.1 anton 297: (unsigned)fp,(unsigned)lp,(unsigned)up);
298: #endif
299:
1.46 anton 300: if (ip0 == NULL) {
1.1 anton 301: #if defined(DOUBLY_INDIRECT)
1.38 anton 302: #define CODE_OFFSET (26*sizeof(Cell))
303: #define XT_OFFSET (22*sizeof(Cell))
1.1 anton 304: int i;
1.3 anton 305: Cell code_offset = offset_image? CODE_OFFSET : 0;
1.38 anton 306: Cell xt_offset = offset_image? XT_OFFSET : 0;
1.7 pazsan 307:
1.3 anton 308: symbols = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+CODE_OFFSET)+code_offset);
1.38 anton 309: xts = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+XT_OFFSET)+xt_offset);
1.1 anton 310: for (i=0; i<DOESJUMP+1; i++)
1.38 anton 311: xts[i] = symbols[i] = (Label)routines[i];
1.1 anton 312: for (; routines[i]!=0; i++) {
313: if (i>=MAX_SYMBOLS) {
1.60 anton 314: fprintf(stderr,"gforth-ditc: more than %ld primitives\n",(long)MAX_SYMBOLS);
1.1 anton 315: exit(1);
1.20 anton 316: }
1.38 anton 317: xts[i] = symbols[i] = &routines[i];
1.1 anton 318: }
1.20 anton 319: #endif /* defined(DOUBLY_INDIRECT) */
320: return symbols;
1.7 pazsan 321: }
1.1 anton 322:
1.24 anton 323: IF_spTOS(spTOS = sp[0]);
324: IF_fpTOS(fpTOS = fp[0]);
1.7 pazsan 325: /* prep_terminal(); */
1.46 anton 326: #ifdef NO_IP
327: goto *(*(Label *)ip0);
328: #else
1.11 anton 329: SET_IP(ip);
1.28 anton 330: SUPER_END; /* count the first block, too */
1.1 anton 331: NEXT;
1.46 anton 332: #endif
1.11 anton 333:
1.1 anton 334: #ifdef CPU_DEP3
335: CPU_DEP3
1.46 anton 336: #endif
1.1 anton 337:
338: #include "prim.i"
1.34 anton 339: after_last: return (Label *)0;
340: /*needed only to get the length of the last primitive */
1.50 anton 341: }
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