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1.1 root 1: #ifndef lint
2: static char sccsid[] = "@(#)nm.c 4.7 5/19/86";
3: #endif
4: /*
5: * nm - print name list; VAX string table version
6: */
7: #include <sys/types.h>
8: #include <ar.h>
9: #include <stdio.h>
10: #include <ctype.h>
11: #include <a.out.h>
12: #include <stab.h>
13: #include <sys/stat.h>
14:
15: #define SELECT archive ? archdr.ar_name : *xargv
16:
17: int aflg, gflg, nflg, oflg, pflg, uflg;
18: int rflg = 1;
19: char **xargv;
20: int archive;
21: struct ar_hdr archdr;
22: union {
23: char mag_armag[SARMAG+1];
24: struct exec mag_exp;
25: } mag_un;
26: #define OARMAG 0177545
27: FILE *fi;
28: off_t off;
29: off_t ftell();
30: char *malloc();
31: char *realloc();
32: char *strp;
33: char *stab();
34: off_t strsiz;
35: int compare();
36: int narg;
37: int errs;
38:
39: main(argc, argv)
40: char **argv;
41: {
42:
43: if (--argc>0 && argv[1][0]=='-' && argv[1][1]!=0) {
44: argv++;
45: while (*++*argv) switch (**argv) {
46:
47: case 'n':
48: nflg++;
49: continue;
50: case 'g':
51: gflg++;
52: continue;
53: case 'u':
54: uflg++;
55: continue;
56: case 'r':
57: rflg = -1;
58: continue;
59: case 'p':
60: pflg++;
61: continue;
62: case 'o':
63: oflg++;
64: continue;
65: case 'a':
66: aflg++;
67: continue;
68: default:
69: fprintf(stderr, "nm: invalid argument -%c\n",
70: *argv[0]);
71: exit(2);
72: }
73: argc--;
74: }
75: if (argc == 0) {
76: argc = 1;
77: argv[1] = "a.out";
78: }
79: narg = argc;
80: xargv = argv;
81: while (argc--) {
82: ++xargv;
83: namelist();
84: }
85: exit(errs);
86: }
87:
88: namelist()
89: {
90: register int j;
91:
92: archive = 0;
93: fi = fopen(*xargv, "r");
94: if (fi == NULL) {
95: error(0, "cannot open");
96: return;
97: }
98: off = SARMAG;
99: fread((char *)&mag_un, 1, sizeof(mag_un), fi);
100: if (mag_un.mag_exp.a_magic == OARMAG) {
101: error(0, "old archive");
102: goto out;
103: }
104: if (strncmp(mag_un.mag_armag, ARMAG, SARMAG)==0)
105: archive++;
106: else if (N_BADMAG(mag_un.mag_exp)) {
107: error(0, "bad format");
108: goto out;
109: }
110: fseek(fi, 0L, 0);
111: if (archive) {
112: nextel(fi);
113: if (narg > 1)
114: printf("\n%s:\n", *xargv);
115: }
116: do {
117: off_t o;
118: register i, n, c;
119: struct nlist *symp = NULL;
120: struct nlist sym;
121: struct stat stb;
122:
123: fread((char *)&mag_un.mag_exp, 1, sizeof(struct exec), fi);
124: if (N_BADMAG(mag_un.mag_exp))
125: continue;
126: if (archive == 0)
127: fstat(fileno(fi), &stb);
128: o = N_SYMOFF(mag_un.mag_exp) - sizeof (struct exec);
129: fseek(fi, o, 1);
130: n = mag_un.mag_exp.a_syms / sizeof(struct nlist);
131: if (n == 0) {
132: error(0, "no name list");
133: continue;
134: }
135: if (N_STROFF(mag_un.mag_exp) + sizeof (off_t) >
136: (archive ? off : stb.st_size)) {
137: error(0, "old format .o (no string table) or truncated file");
138: continue;
139: }
140: i = 0;
141: if (strp)
142: free(strp), strp = 0;
143: while (--n >= 0) {
144: fread((char *)&sym, 1, sizeof(sym), fi);
145: if (gflg && (sym.n_type&N_EXT)==0)
146: continue;
147: if ((sym.n_type&N_STAB) && (!aflg||gflg||uflg))
148: continue;
149: if (symp==NULL)
150: symp = (struct nlist *)
151: malloc(sizeof(struct nlist));
152: else
153: symp = (struct nlist *)
154: realloc(symp,
155: (i+1)*sizeof(struct nlist));
156: if (symp == NULL)
157: error(1, "out of memory");
158: symp[i++] = sym;
159: }
160: if (archive && ftell(fi)+sizeof(off_t) >= off) {
161: error(0, "no string table (old format .o?)");
162: continue;
163: }
164: if (fread((char *)&strsiz,sizeof(strsiz),1,fi) != 1) {
165: error(0, "no string table (old format .o?)");
166: goto out;
167: }
168: strp = (char *)malloc(strsiz);
169: if (strp == NULL)
170: error(1, "ran out of memory");
171: if (fread(strp+sizeof(strsiz),strsiz-sizeof(strsiz),1,fi) != 1)
172: error(1, "error reading string table");
173: for (j = 0; j < i; j++)
174: if (symp[j].n_un.n_strx)
175: symp[j].n_un.n_name =
176: symp[j].n_un.n_strx + strp;
177: else
178: symp[j].n_un.n_name = "";
179: if (pflg==0)
180: qsort(symp, i, sizeof(struct nlist), compare);
181: if ((archive || narg>1) && oflg==0)
182: printf("\n%s:\n", SELECT);
183: psyms(symp, i);
184: if (symp)
185: free((char *)symp), symp = 0;
186: if (strp)
187: free((char *)strp), strp = 0;
188: } while(archive && nextel(fi));
189: out:
190: fclose(fi);
191: }
192:
193: psyms(symp, nsyms)
194: register struct nlist *symp;
195: int nsyms;
196: {
197: register int n, c;
198:
199: for (n=0; n<nsyms; n++) {
200: c = symp[n].n_type;
201: if (c & N_STAB) {
202: if (oflg) {
203: if (archive)
204: printf("%s:", *xargv);
205: printf("%s:", SELECT);
206: }
207: printf("%08x - %02x %04x %5.5s %s\n",
208: symp[n].n_value,
209: symp[n].n_other & 0xff, symp[n].n_desc & 0xffff,
210: stab(symp[n].n_type & 0xff),
211: symp[n].n_un.n_name);
212: continue;
213: }
214: if (c == N_FN)
215: c = 'f';
216: else switch (c&N_TYPE) {
217:
218: case N_UNDF:
219: c = 'u';
220: if (symp[n].n_value)
221: c = 'c';
222: break;
223: case N_ABS:
224: c = 'a';
225: break;
226: case N_TEXT:
227: c = 't';
228: break;
229: case N_DATA:
230: c = 'd';
231: break;
232: case N_BSS:
233: c = 'b';
234: break;
235: default:
236: c = '?';
237: break;
238: }
239: if (uflg && c!='u')
240: continue;
241: if (oflg) {
242: if (archive)
243: printf("%s:", *xargv);
244: printf("%s:", SELECT);
245: }
246: if (symp[n].n_type&N_EXT)
247: c = toupper(c);
248: if (!uflg) {
249: if (c=='u' || c=='U')
250: printf(" ");
251: else
252: printf(N_FORMAT, symp[n].n_value);
253: printf(" %c ", c);
254: }
255: printf("%s\n", symp[n].n_un.n_name);
256: l1: ;
257: }
258: }
259:
260: compare(p1, p2)
261: struct nlist *p1, *p2;
262: {
263: register i;
264:
265: if (nflg) {
266: if (p1->n_value > p2->n_value)
267: return(rflg);
268: if (p1->n_value < p2->n_value)
269: return(-rflg);
270: }
271: return (rflg * strcmp(p1->n_un.n_name, p2->n_un.n_name));
272: }
273:
274: nextel(af)
275: FILE *af;
276: {
277: register char *cp;
278: register r;
279: long arsize;
280:
281: fseek(af, off, 0);
282: r = fread((char *)&archdr, 1, sizeof(struct ar_hdr), af);
283: if (r != sizeof(struct ar_hdr))
284: return(0);
285: for (cp = archdr.ar_name; cp < &archdr.ar_name[sizeof(archdr.ar_name)]; cp++)
286: if (*cp == ' ')
287: *cp = '\0';
288: arsize = atol(archdr.ar_size);
289: if (arsize & 1)
290: ++arsize;
291: off = ftell(af) + arsize; /* beginning of next element */
292: return(1);
293: }
294:
295: error(n, s)
296: char *s;
297: {
298: fprintf(stderr, "nm: %s:", *xargv);
299: if (archive) {
300: fprintf(stderr, "(%s)", archdr.ar_name);
301: fprintf(stderr, ": ");
302: } else
303: fprintf(stderr, " ");
304: fprintf(stderr, "%s\n", s);
305: if (n)
306: exit(2);
307: errs = 1;
308: }
309:
310: struct stabnames {
311: int st_value;
312: char *st_name;
313: } stabnames[] ={
314: N_GSYM, "GSYM",
315: N_FNAME, "FNAME",
316: N_FUN, "FUN",
317: N_STSYM, "STSYM",
318: N_LCSYM, "LCSYM",
319: N_RSYM, "RSYM",
320: N_SLINE, "SLINE",
321: N_SSYM, "SSYM",
322: N_SO, "SO",
323: N_LSYM, "LSYM",
324: N_SOL, "SOL",
325: N_PSYM, "PSYM",
326: N_ENTRY, "ENTRY",
327: N_LBRAC, "LBRAC",
328: N_RBRAC, "RBRAC",
329: N_BCOMM, "BCOMM",
330: N_ECOMM, "ECOMM",
331: N_ECOML, "ECOML",
332: N_LENG, "LENG",
333: N_PC, "PC",
334: 0, 0
335: };
336:
337: char *
338: stab(val)
339: {
340: register struct stabnames *sp;
341: static char prbuf[32];
342:
343: for (sp = stabnames; sp->st_name; sp++)
344: if (sp->st_value == val)
345: return (sp->st_name);
346: sprintf(prbuf, "%02x", val);
347: return (prbuf);
348: }
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