| 1 | static char sccsid[] = "@(#)nm.c 4.1 %G%"; |
| 2 | /* |
| 3 | * nm - print name list; VAX string table version |
| 4 | */ |
| 5 | #include <sys/types.h> |
| 6 | #include <ar.h> |
| 7 | #include <stdio.h> |
| 8 | #include <ctype.h> |
| 9 | #include <a.out.h> |
| 10 | #include <stab.h> |
| 11 | #include <pagsiz.h> |
| 12 | #include <stat.h> |
| 13 | |
| 14 | #define SELECT archive ? archdr.ar_name : *xargv |
| 15 | |
| 16 | int aflg, gflg, nflg, oflg, pflg, uflg; |
| 17 | int rflg = 1; |
| 18 | char **xargv; |
| 19 | int archive; |
| 20 | struct ar_hdr archdr; |
| 21 | union { |
| 22 | char mag_armag[SARMAG+1]; |
| 23 | struct exec mag_exp; |
| 24 | } mag_un; |
| 25 | #define OARMAG 0177545 |
| 26 | FILE *fi; |
| 27 | off_t off; |
| 28 | off_t ftell(); |
| 29 | char *malloc(); |
| 30 | char *realloc(); |
| 31 | char *strp; |
| 32 | char *stab(); |
| 33 | off_t strsiz; |
| 34 | int compare(); |
| 35 | int narg; |
| 36 | int errs; |
| 37 | |
| 38 | main(argc, argv) |
| 39 | char **argv; |
| 40 | { |
| 41 | |
| 42 | if (--argc>0 && argv[1][0]=='-' && argv[1][1]!=0) { |
| 43 | argv++; |
| 44 | while (*++*argv) switch (**argv) { |
| 45 | |
| 46 | case 'n': |
| 47 | nflg++; |
| 48 | continue; |
| 49 | case 'g': |
| 50 | gflg++; |
| 51 | continue; |
| 52 | case 'u': |
| 53 | uflg++; |
| 54 | continue; |
| 55 | case 'r': |
| 56 | rflg = -1; |
| 57 | continue; |
| 58 | case 'p': |
| 59 | pflg++; |
| 60 | continue; |
| 61 | case 'o': |
| 62 | oflg++; |
| 63 | continue; |
| 64 | case 'a': |
| 65 | aflg++; |
| 66 | continue; |
| 67 | default: |
| 68 | fprintf(stderr, "nm: invalid argument -%c\n", |
| 69 | *argv[0]); |
| 70 | exit(2); |
| 71 | } |
| 72 | argc--; |
| 73 | } |
| 74 | if (argc == 0) { |
| 75 | argc = 1; |
| 76 | argv[1] = "a.out"; |
| 77 | } |
| 78 | narg = argc; |
| 79 | xargv = argv; |
| 80 | while (argc--) { |
| 81 | ++xargv; |
| 82 | namelist(); |
| 83 | } |
| 84 | exit(errs); |
| 85 | } |
| 86 | |
| 87 | namelist() |
| 88 | { |
| 89 | register int j; |
| 90 | |
| 91 | archive = 0; |
| 92 | fi = fopen(*xargv, "r"); |
| 93 | if (fi == NULL) { |
| 94 | error(0, "cannot open"); |
| 95 | return; |
| 96 | } |
| 97 | off = SARMAG; |
| 98 | fread((char *)&mag_un, 1, sizeof(mag_un), fi); |
| 99 | if (mag_un.mag_exp.a_magic == OARMAG) { |
| 100 | error(0, "old archive"); |
| 101 | return; |
| 102 | } |
| 103 | if (strncmp(mag_un.mag_armag, ARMAG, SARMAG)==0) |
| 104 | archive++; |
| 105 | else if (N_BADMAG(mag_un.mag_exp)) { |
| 106 | error(0, "bad format"); |
| 107 | return; |
| 108 | } |
| 109 | fseek(fi, 0L, 0); |
| 110 | if (archive) { |
| 111 | nextel(fi); |
| 112 | if (narg > 1) |
| 113 | printf("\n%s:\n", *xargv); |
| 114 | } |
| 115 | do { |
| 116 | off_t o; |
| 117 | register i, n, c; |
| 118 | struct nlist *symp = NULL; |
| 119 | struct nlist sym; |
| 120 | struct stat stb; |
| 121 | |
| 122 | fread((char *)&mag_un.mag_exp, 1, sizeof(struct exec), fi); |
| 123 | if (N_BADMAG(mag_un.mag_exp)) |
| 124 | continue; |
| 125 | if (archive == 0) |
| 126 | fstat(fileno(fi), &stb); |
| 127 | o = N_SYMOFF(mag_un.mag_exp) - sizeof (struct exec); |
| 128 | fseek(fi, o, 1); |
| 129 | n = mag_un.mag_exp.a_syms / sizeof(struct nlist); |
| 130 | if (n == 0) { |
| 131 | error(0, "no name list"); |
| 132 | continue; |
| 133 | } |
| 134 | if (N_STROFF(mag_un.mag_exp) + sizeof (off_t) > |
| 135 | (archive ? off : stb.st_size)) |
| 136 | error(1, "old format .o (no string table) or truncated file"); |
| 137 | i = 0; |
| 138 | if (strp) |
| 139 | free(strp), strp = 0; |
| 140 | while (--n >= 0) { |
| 141 | fread((char *)&sym, 1, sizeof(sym), fi); |
| 142 | if (gflg && (sym.n_type&N_EXT)==0) |
| 143 | continue; |
| 144 | if ((sym.n_type&N_STAB) && (!aflg||gflg||uflg)) |
| 145 | continue; |
| 146 | if (symp==NULL) |
| 147 | symp = (struct nlist *) |
| 148 | malloc(sizeof(struct nlist)); |
| 149 | else |
| 150 | symp = (struct nlist *) |
| 151 | realloc(symp, |
| 152 | (i+1)*sizeof(struct nlist)); |
| 153 | if (symp == NULL) |
| 154 | error(1, "out of memory"); |
| 155 | symp[i++] = sym; |
| 156 | } |
| 157 | if (archive && ftell(fi)+sizeof(off_t) >= off) { |
| 158 | error(0, "no string table (old format .o?)"); |
| 159 | continue; |
| 160 | } |
| 161 | if (fread((char *)&strsiz,sizeof(strsiz),1,fi) != 1) { |
| 162 | error(0, "no string table (old format .o?)"); |
| 163 | goto out; |
| 164 | } |
| 165 | strp = (char *)malloc(strsiz); |
| 166 | if (strp == NULL) |
| 167 | error(1, "ran out of memory"); |
| 168 | if (fread(strp+sizeof(strsiz),strsiz-sizeof(strsiz),1,fi) != 1) |
| 169 | error(1, "error reading string table"); |
| 170 | for (j = 0; j < i; j++) |
| 171 | if (symp[j].n_un.n_strx) |
| 172 | symp[j].n_un.n_name = |
| 173 | symp[j].n_un.n_strx + strp; |
| 174 | else |
| 175 | symp[j].n_un.n_name = ""; |
| 176 | if (pflg==0) |
| 177 | qsort(symp, i, sizeof(struct nlist), compare); |
| 178 | if ((archive || narg>1) && oflg==0) |
| 179 | printf("\n%s:\n", SELECT); |
| 180 | psyms(symp, i); |
| 181 | if (symp) |
| 182 | free((char *)symp), symp = 0; |
| 183 | if (strp) |
| 184 | free((char *)strp), strp = 0; |
| 185 | } while(archive && nextel(fi)); |
| 186 | out: |
| 187 | fclose(fi); |
| 188 | } |
| 189 | |
| 190 | psyms(symp, nsyms) |
| 191 | register struct nlist *symp; |
| 192 | int nsyms; |
| 193 | { |
| 194 | register int n, c; |
| 195 | |
| 196 | for (n=0; n<nsyms; n++) { |
| 197 | c = symp[n].n_type; |
| 198 | if (c & N_STAB) { |
| 199 | if (oflg) { |
| 200 | if (archive) |
| 201 | printf("%s:", *xargv); |
| 202 | printf("%s:", SELECT); |
| 203 | } |
| 204 | printf("%08x - %02x %04x %5.5s %s\n", |
| 205 | symp[n].n_value, |
| 206 | symp[n].n_other & 0xff, symp[n].n_desc & 0xffff, |
| 207 | stab(symp[n].n_type & 0xff), |
| 208 | symp[n].n_un.n_name); |
| 209 | continue; |
| 210 | } |
| 211 | switch (c&N_TYPE) { |
| 212 | |
| 213 | case N_UNDF: |
| 214 | c = 'u'; |
| 215 | if (symp[n].n_value) |
| 216 | c = 'c'; |
| 217 | break; |
| 218 | case N_ABS: |
| 219 | c = 'a'; |
| 220 | break; |
| 221 | case N_TEXT: |
| 222 | c = 't'; |
| 223 | break; |
| 224 | case N_DATA: |
| 225 | c = 'd'; |
| 226 | break; |
| 227 | case N_BSS: |
| 228 | c = 'b'; |
| 229 | break; |
| 230 | case N_FN: |
| 231 | c = 'f'; |
| 232 | break; |
| 233 | } |
| 234 | if (uflg && c!='u') |
| 235 | continue; |
| 236 | if (oflg) { |
| 237 | if (archive) |
| 238 | printf("%s:", *xargv); |
| 239 | printf("%s:", SELECT); |
| 240 | } |
| 241 | if (symp[n].n_type&N_EXT) |
| 242 | c = toupper(c); |
| 243 | if (!uflg) { |
| 244 | if (c=='u' || c=='U') |
| 245 | printf(" "); |
| 246 | else |
| 247 | printf(N_FORMAT, symp[n].n_value); |
| 248 | printf(" %c ", c); |
| 249 | } |
| 250 | printf("%s\n", symp[n].n_un.n_name); |
| 251 | l1: ; |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | compare(p1, p2) |
| 256 | struct nlist *p1, *p2; |
| 257 | { |
| 258 | register i; |
| 259 | |
| 260 | if (nflg) { |
| 261 | if (p1->n_value > p2->n_value) |
| 262 | return(rflg); |
| 263 | if (p1->n_value < p2->n_value) |
| 264 | return(-rflg); |
| 265 | } |
| 266 | return (rflg * strcmp(p1->n_un.n_name, p2->n_un.n_name)); |
| 267 | } |
| 268 | |
| 269 | nextel(af) |
| 270 | FILE *af; |
| 271 | { |
| 272 | register char *cp; |
| 273 | register r; |
| 274 | long arsize; |
| 275 | |
| 276 | fseek(af, off, 0); |
| 277 | r = fread((char *)&archdr, 1, sizeof(struct ar_hdr), af); |
| 278 | if (r != sizeof(struct ar_hdr)) |
| 279 | return(0); |
| 280 | for (cp = archdr.ar_name; cp < &archdr.ar_name[sizeof(archdr.ar_name)]; cp++) |
| 281 | if (*cp == ' ') |
| 282 | *cp = '\0'; |
| 283 | arsize = atol(archdr.ar_size); |
| 284 | if (arsize & 1) |
| 285 | ++arsize; |
| 286 | off = ftell(af) + arsize; /* beginning of next element */ |
| 287 | return(1); |
| 288 | } |
| 289 | |
| 290 | error(n, s) |
| 291 | char *s; |
| 292 | { |
| 293 | fprintf(stderr, "nm: %s:", *xargv); |
| 294 | if (archive) { |
| 295 | fprintf(stderr, "(%s)", archdr.ar_name); |
| 296 | fprintf(stderr, ": "); |
| 297 | } else |
| 298 | fprintf(stderr, " "); |
| 299 | fprintf(stderr, "%s\n", s); |
| 300 | if (n) |
| 301 | exit(2); |
| 302 | errs = 1; |
| 303 | } |
| 304 | |
| 305 | struct stabnames { |
| 306 | int st_value; |
| 307 | char *st_name; |
| 308 | } stabnames[] ={ |
| 309 | N_GSYM, "GSYM", |
| 310 | N_FNAME, "FNAME", |
| 311 | N_FUN, "FUN", |
| 312 | N_STSYM, "STSYM", |
| 313 | N_LCSYM, "LCSYM", |
| 314 | N_RSYM, "RSYM", |
| 315 | N_SLINE, "SLINE", |
| 316 | N_SSYM, "SSYM", |
| 317 | N_SO, "SO", |
| 318 | N_LSYM, "LSYM", |
| 319 | N_SOL, "SOL", |
| 320 | N_PSYM, "PSYM", |
| 321 | N_ENTRY, "ENTRY", |
| 322 | N_LBRAC, "LBRAC", |
| 323 | N_RBRAC, "RBRAC", |
| 324 | N_BCOMM, "BCOMM", |
| 325 | N_ECOMM, "ECOMM", |
| 326 | N_ECOML, "ECOML", |
| 327 | N_LENG, "LENG", |
| 328 | N_PC, "PC", |
| 329 | 0, 0 |
| 330 | }; |
| 331 | |
| 332 | char * |
| 333 | stab(val) |
| 334 | { |
| 335 | register struct stabnames *sp; |
| 336 | static char prbuf[32]; |
| 337 | |
| 338 | for (sp = stabnames; sp->st_name; sp++) |
| 339 | if (sp->st_value == val) |
| 340 | return (sp->st_name); |
| 341 | sprintf(prbuf, "%02x", val); |
| 342 | return (prbuf); |
| 343 | } |