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| 1 : | anton | 1.1 | /* |
| 2 : | pazsan | 1.16 | $Id: main.c,v 1.15 1994/10/24 19:16:02 anton Exp $ |
| 3 : | anton | 1.1 | Copyright 1993 by the ANSI figForth Development Group |
| 4 : | */ | ||
| 5 : | |||
| 6 : | #include <ctype.h> | ||
| 7 : | #include <stdio.h> | ||
| 8 : | #include <string.h> | ||
| 9 : | #include <math.h> | ||
| 10 : | #include <sys/types.h> | ||
| 11 : | #include <sys/stat.h> | ||
| 12 : | #include <fcntl.h> | ||
| 13 : | #include <assert.h> | ||
| 14 : | #include <stdlib.h> | ||
| 15 : | #include "forth.h" | ||
| 16 : | pazsan | 1.5 | #include "io.h" |
| 17 : | pazsan | 1.12 | #ifdef USE_GETOPT |
| 18 : | # include "getopt.h" | ||
| 19 : | #else | ||
| 20 : | pazsan | 1.16 | extern int getopt (int , char * const [], const char *); |
| 21 : | pazsan | 1.12 | |
| 22 : | pazsan | 1.16 | extern char *optarg; |
| 23 : | extern int optind, opterr; | ||
| 24 : | pazsan | 1.12 | #endif |
| 25 : | pazsan | 1.2 | |
| 26 : | anton | 1.10 | #ifndef DEFAULTPATH |
| 27 : | pazsan | 1.16 | # define DEFAULTPATH "/usr/local/lib/gforth:." |
| 28 : | anton | 1.10 | #endif |
| 29 : | |||
| 30 : | anton | 1.1 | #ifdef DIRECT_THREADED |
| 31 : | pazsan | 1.16 | # define CA(n) (symbols[(n)]) |
| 32 : | anton | 1.1 | #else |
| 33 : | pazsan | 1.16 | # define CA(n) ((int)(symbols+(n))) |
| 34 : | anton | 1.1 | #endif |
| 35 : | |||
| 36 : | anton | 1.10 | #define maxaligned(n) ((((Cell)n)+sizeof(Float)-1)&-sizeof(Float)) |
| 37 : | |||
| 38 : | static int dictsize=0; | ||
| 39 : | static int dsize=0; | ||
| 40 : | static int rsize=0; | ||
| 41 : | static int fsize=0; | ||
| 42 : | static int lsize=0; | ||
| 43 : | char *progname; | ||
| 44 : | |||
| 45 : | |||
| 46 : | anton | 1.1 | /* image file format: |
| 47 : | * size of image with stacks without tags (in bytes) | ||
| 48 : | * size of image without stacks and tags (in bytes) | ||
| 49 : | pazsan | 1.5 | * size of data and FP stack (in bytes) |
| 50 : | anton | 1.1 | * pointer to start of code |
| 51 : | anton | 1.7 | * pointer into throw (for signal handling) |
| 52 : | pazsan | 1.16 | * pointer to dictionary |
| 53 : | anton | 1.1 | * data (size in image[1]) |
| 54 : | * tags (1 bit/data cell) | ||
| 55 : | * | ||
| 56 : | * tag==1 mean that the corresponding word is an address; | ||
| 57 : | * If the word is >=0, the address is within the image; | ||
| 58 : | * addresses within the image are given relative to the start of the image. | ||
| 59 : | * If the word is =-1, the address is NIL, | ||
| 60 : | pazsan | 1.2 | * If the word is between -2 and -5, it's a CFA (:, Create, Constant, User) |
| 61 : | * If the word is -6, it's a DOES> CFA | ||
| 62 : | * If the word is -7, it's a DOES JUMP | ||
| 63 : | * If the word is <-7, it's a primitive | ||
| 64 : | anton | 1.1 | */ |
| 65 : | |||
| 66 : | anton | 1.10 | void relocate(Cell *image, char *bitstring, int size, Label symbols[]) |
| 67 : | anton | 1.1 | { |
| 68 : | pazsan | 1.16 | int i=0, j, k, steps=(size/sizeof(Cell))/8; |
| 69 : | char bits; | ||
| 70 : | pazsan | 1.5 | /* static char bits[8]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01};*/ |
| 71 : | |||
| 72 : | pazsan | 1.16 | for(k=0; k<=steps; k++) |
| 73 : | for(j=0, bits=bitstring[k]; j<8; j++, i++, bits<<=1) | ||
| 74 : | if(bits & 0x80) | ||
| 75 : | if(image[i]<0) | ||
| 76 : | switch(image[i]) | ||
| 77 : | { | ||
| 78 : | case CF_NIL : image[i]=0; break; | ||
| 79 : | case CF(DOCOL) : | ||
| 80 : | case CF(DOVAR) : | ||
| 81 : | case CF(DOCON) : | ||
| 82 : | case CF(DOUSER) : | ||
| 83 : | case CF(DODEFER) : MAKE_CF(image+i,symbols[CF(image[i])]); break; | ||
| 84 : | case CF(DODOES) : MAKE_DOES_CF(image+i,image[i+1]+((int)image)); | ||
| 85 : | break; | ||
| 86 : | case CF(DOESJUMP): MAKE_DOES_HANDLER(image+i); break; | ||
| 87 : | default : image[i]=(Cell)CA(CF(image[i])); | ||
| 88 : | } | ||
| 89 : | else | ||
| 90 : | image[i]+=(Cell)image; | ||
| 91 : | anton | 1.1 | } |
| 92 : | |||
| 93 : | anton | 1.10 | Cell *loader(FILE *imagefile) |
| 94 : | { | ||
| 95 : | pazsan | 1.16 | Cell header[3]; |
| 96 : | Cell *image; | ||
| 97 : | int wholesize; | ||
| 98 : | int imagesize; /* everything needed by the image */ | ||
| 99 : | |||
| 100 : | fread(header,1,3*sizeof(Cell),imagefile); | ||
| 101 : | if (dictsize==0) | ||
| 102 : | dictsize = header[0]; | ||
| 103 : | if (dsize==0) | ||
| 104 : | dsize=header[2]; | ||
| 105 : | if (rsize==0) | ||
| 106 : | rsize=header[2]; | ||
| 107 : | if (fsize==0) | ||
| 108 : | fsize=header[2]; | ||
| 109 : | if (lsize==0) | ||
| 110 : | lsize=header[2]; | ||
| 111 : | dictsize=maxaligned(dictsize); | ||
| 112 : | dsize=maxaligned(dsize); | ||
| 113 : | rsize=maxaligned(rsize); | ||
| 114 : | lsize=maxaligned(lsize); | ||
| 115 : | fsize=maxaligned(fsize); | ||
| 116 : | |||
| 117 : | wholesize = dictsize+dsize+rsize+fsize+lsize; | ||
| 118 : | imagesize = header[1]+((header[1]-1)/sizeof(Cell))/8+1; | ||
| 119 : | image=malloc(wholesize>imagesize?wholesize:imagesize); | ||
| 120 : | memset(image,0,wholesize); /* why? - anton */ | ||
| 121 : | image[0]=header[0]; | ||
| 122 : | image[1]=header[1]; | ||
| 123 : | image[2]=header[2]; | ||
| 124 : | |||
| 125 : | fread(image+3,1,header[1]-3*sizeof(Cell),imagefile); | ||
| 126 : | fread(((void *)image)+header[1],1,((header[1]-1)/sizeof(Cell))/8+1, | ||
| 127 : | imagefile); | ||
| 128 : | fclose(imagefile); | ||
| 129 : | |||
| 130 : | if(image[5]==0) { | ||
| 131 : | relocate(image,(char *)image+header[1],header[1],engine(0,0,0,0,0)); | ||
| 132 : | } | ||
| 133 : | else if(image[5]!=(Cell)image) { | ||
| 134 : | fprintf(stderr,"Corrupted image address, please recompile image\n"); | ||
| 135 : | exit(1); | ||
| 136 : | } | ||
| 137 : | anton | 1.1 | |
| 138 : | pazsan | 1.16 | CACHE_FLUSH(image,image[1]); |
| 139 : | |||
| 140 : | return(image); | ||
| 141 : | anton | 1.1 | } |
| 142 : | |||
| 143 : | anton | 1.10 | int go_forth(Cell *image, int stack, Cell *entries) |
| 144 : | anton | 1.1 | { |
| 145 : | anton | 1.15 | Cell *sp=(Cell*)((void *)image+dictsize+dsize); |
| 146 : | Address lp=(Address)((void *)sp+lsize); | ||
| 147 : | Float *fp=(Float *)((void *)lp+fsize); | ||
| 148 : | Cell *rp=(Cell*)((void *)fp+rsize); | ||
| 149 : | Xt *ip=(Xt *)(image[3]); | ||
| 150 : | int throw_code; | ||
| 151 : | |||
| 152 : | for(;stack>0;stack--) | ||
| 153 : | *--sp=entries[stack-1]; | ||
| 154 : | |||
| 155 : | install_signal_handlers(); /* right place? */ | ||
| 156 : | |||
| 157 : | if ((throw_code=setjmp(throw_jmp_buf))) { | ||
| 158 : | static Cell signal_data_stack[8]; | ||
| 159 : | static Cell signal_return_stack[8]; | ||
| 160 : | static Float signal_fp_stack[1]; | ||
| 161 : | |||
| 162 : | signal_data_stack[7]=throw_code; | ||
| 163 : | |||
| 164 : | return((int)engine((Xt *)image[4],signal_data_stack+7, | ||
| 165 : | signal_return_stack+8,signal_fp_stack,0)); | ||
| 166 : | } | ||
| 167 : | |||
| 168 : | return((int)engine(ip,sp,rp,fp,lp)); | ||
| 169 : | anton | 1.1 | } |
| 170 : | |||
| 171 : | anton | 1.10 | int convsize(char *s, int elemsize) |
| 172 : | /* converts s of the format #+u (e.g. 25k) into the number of bytes. | ||
| 173 : | the unit u can be one of bekM, where e stands for the element | ||
| 174 : | size. default is e */ | ||
| 175 : | { | ||
| 176 : | char *endp; | ||
| 177 : | int n,m; | ||
| 178 : | |||
| 179 : | m = elemsize; | ||
| 180 : | n = strtoul(s,&endp,0); | ||
| 181 : | if (endp!=NULL) { | ||
| 182 : | if (strcmp(endp,"b")==0) | ||
| 183 : | m=1; | ||
| 184 : | else if (strcmp(endp,"k")==0) | ||
| 185 : | m=1024; | ||
| 186 : | else if (strcmp(endp,"M")==0) | ||
| 187 : | m=1024*1024; | ||
| 188 : | else if (strcmp(endp,"e")!=0) { | ||
| 189 : | fprintf(stderr,"%s: cannot grok size specification %s\n", progname, s); | ||
| 190 : | exit(1); | ||
| 191 : | } | ||
| 192 : | } | ||
| 193 : | return n*m; | ||
| 194 : | } | ||
| 195 : | |||
| 196 : | anton | 1.1 | int main(int argc, char **argv, char **env) |
| 197 : | { | ||
| 198 : | pazsan | 1.16 | char *path, *path1; |
| 199 : | char *imagename="gforth.fi"; | ||
| 200 : | FILE *image_file; | ||
| 201 : | int c, retvalue; | ||
| 202 : | anton | 1.10 | |
| 203 : | anton | 1.14 | #if defined(i386) && defined(ALIGNMENT_CHECK) && !defined(DIRECT_THREADED) |
| 204 : | anton | 1.6 | /* turn on alignment checks on the 486. |
| 205 : | * on the 386 this should have no effect. */ | ||
| 206 : | __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;"); | ||
| 207 : | #endif | ||
| 208 : | pazsan | 1.2 | |
| 209 : | pazsan | 1.16 | progname = argv[0]; |
| 210 : | if ((path=getenv("GFORTHPATH"))==NULL) | ||
| 211 : | path = strcpy(malloc(strlen(DEFAULTPATH)+1),DEFAULTPATH); | ||
| 212 : | opterr=0; | ||
| 213 : | while (1) { | ||
| 214 : | int option_index=0; | ||
| 215 : | pazsan | 1.12 | #ifdef USE_GETOPT |
| 216 : | pazsan | 1.16 | static struct option opts[] = { |
| 217 : | {"image-file", required_argument, NULL, 'i'}, | ||
| 218 : | {"dictionary-size", required_argument, NULL, 'm'}, | ||
| 219 : | {"data-stack-size", required_argument, NULL, 'd'}, | ||
| 220 : | {"return-stack-size", required_argument, NULL, 'r'}, | ||
| 221 : | {"fp-stack-size", required_argument, NULL, 'f'}, | ||
| 222 : | {"locals-stack-size", required_argument, NULL, 'l'}, | ||
| 223 : | {"path", required_argument, NULL, 'p'}, | ||
| 224 : | {0,0,0,0} | ||
| 225 : | /* no-init-file, no-rc? */ | ||
| 226 : | }; | ||
| 227 : | anton | 1.10 | |
| 228 : | pazsan | 1.16 | c = getopt_long(argc, argv, "i:m:d:r:f:l:p:", opts, &option_index); |
| 229 : | pazsan | 1.12 | #else |
| 230 : | pazsan | 1.16 | c = getopt(argc, argv, "i:m:d:r:f:l:p:"); |
| 231 : | pazsan | 1.12 | #endif |
| 232 : | |||
| 233 : | pazsan | 1.16 | if (c==EOF) |
| 234 : | break; | ||
| 235 : | if (c=='?') { | ||
| 236 : | optind--; | ||
| 237 : | break; | ||
| 238 : | } | ||
| 239 : | switch (c) { | ||
| 240 : | case 'i': imagename = optarg; break; | ||
| 241 : | case 'm': dictsize = convsize(optarg,sizeof(Cell)); break; | ||
| 242 : | case 'd': dsize = convsize(optarg,sizeof(Cell)); break; | ||
| 243 : | case 'r': rsize = convsize(optarg,sizeof(Cell)); break; | ||
| 244 : | case 'f': fsize = convsize(optarg,sizeof(Float)); break; | ||
| 245 : | case 'l': lsize = convsize(optarg,sizeof(Cell)); break; | ||
| 246 : | case 'p': path = optarg; break; | ||
| 247 : | } | ||
| 248 : | } | ||
| 249 : | path1=path; | ||
| 250 : | do { | ||
| 251 : | char *pend=strchr(path, ':'); | ||
| 252 : | if (pend==NULL) | ||
| 253 : | pend=path+strlen(path); | ||
| 254 : | if (strlen(path)==0) { | ||
| 255 : | fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n", | ||
| 256 : | progname, imagename, path1); | ||
| 257 : | exit(1); | ||
| 258 : | } | ||
| 259 : | { | ||
| 260 : | int dirlen=pend-path; | ||
| 261 : | char fullfilename[dirlen+strlen(imagename)+2]; | ||
| 262 : | memcpy(fullfilename, path, dirlen); | ||
| 263 : | if (fullfilename[dirlen-1]!='/') | ||
| 264 : | fullfilename[dirlen++]='/'; | ||
| 265 : | strcpy(fullfilename+dirlen,imagename); | ||
| 266 : | image_file=fopen(fullfilename,"rb"); | ||
| 267 : | } | ||
| 268 : | path=pend+(*pend==':'); | ||
| 269 : | } while (image_file==NULL); | ||
| 270 : | |||
| 271 : | { | ||
| 272 : | Cell environ[]= { | ||
| 273 : | (Cell)argc-(optind-1), | ||
| 274 : | (Cell)(argv+(optind-1)), | ||
| 275 : | (Cell)path1}; | ||
| 276 : | argv[optind-1] = progname; | ||
| 277 : | /* | ||
| 278 : | for (i=0; i<environ[0]; i++) | ||
| 279 : | printf("%s\n", ((char **)(environ[1]))[i]); | ||
| 280 : | */ | ||
| 281 : | retvalue=go_forth(loader(image_file),3,environ); | ||
| 282 : | deprep_terminal(); | ||
| 283 : | exit(retvalue); | ||
| 284 : | } | ||
| 285 : | anton | 1.1 | } |
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