| 1 | /* |
| 2 | ** print symbol tables for |
| 3 | ** object or archive files |
| 4 | ** |
| 5 | ** nm [-goprun] [name ...] |
| 6 | */ |
| 7 | |
| 8 | |
| 9 | |
| 10 | #include <ar.h> |
| 11 | #include <stdio.h> |
| 12 | #include <ctype.h> |
| 13 | #include <a.out.h> |
| 14 | #include <pagsiz.h> |
| 15 | |
| 16 | #define MAGIC exp.a_magic |
| 17 | #define BADMAG MAGIC!=A_MAGIC1 && MAGIC!=A_MAGIC2 \ |
| 18 | && MAGIC!=A_MAGIC3 && MAGIC!=A_MAGIC4 && MAGIC != 0412 && MAGIC != 0413 |
| 19 | #define SELECT arch_flg ? arp.ar_name : *argv |
| 20 | int numsort_flg; |
| 21 | int undef_flg; |
| 22 | int revsort_flg = 1; |
| 23 | int globl_flg; |
| 24 | int nosort_flg; |
| 25 | int arch_flg; |
| 26 | int prep_flg; |
| 27 | struct ar_hdr arp; |
| 28 | struct exec exp; |
| 29 | FILE *fi; |
| 30 | long off; |
| 31 | long ftell(); |
| 32 | char *malloc(); |
| 33 | char *realloc(); |
| 34 | |
| 35 | main(argc, argv) |
| 36 | char **argv; |
| 37 | { |
| 38 | int narg; |
| 39 | int compare(); |
| 40 | |
| 41 | if (--argc>0 && argv[1][0]=='-' && argv[1][1]!=0) { |
| 42 | argv++; |
| 43 | while (*++*argv) switch (**argv) { |
| 44 | case 'n': /* sort numerically */ |
| 45 | numsort_flg++; |
| 46 | continue; |
| 47 | |
| 48 | case 'g': /* globl symbols only */ |
| 49 | globl_flg++; |
| 50 | continue; |
| 51 | |
| 52 | case 'u': /* undefined symbols only */ |
| 53 | undef_flg++; |
| 54 | continue; |
| 55 | |
| 56 | case 'r': /* sort in reverse order */ |
| 57 | revsort_flg = -1; |
| 58 | continue; |
| 59 | |
| 60 | case 'p': /* don't sort -- symbol table order */ |
| 61 | nosort_flg++; |
| 62 | continue; |
| 63 | |
| 64 | case 'o': /* prepend a name to each line */ |
| 65 | prep_flg++; |
| 66 | continue; |
| 67 | |
| 68 | default: /* oops */ |
| 69 | fprintf(stderr, "nm: invalid argument -%c\n", *argv[0]); |
| 70 | exit(1); |
| 71 | } |
| 72 | argc--; |
| 73 | } |
| 74 | if (argc == 0) { |
| 75 | argc = 1; |
| 76 | argv[1] = "a.out"; |
| 77 | } |
| 78 | narg = argc; |
| 79 | while(argc--) { |
| 80 | fi = fopen(*++argv,"r"); |
| 81 | if (fi == NULL) { |
| 82 | fprintf(stderr, "nm: cannot open %s\n", *argv); |
| 83 | continue; |
| 84 | } |
| 85 | off = sizeof(exp.a_magic); |
| 86 | fread((char *)&exp, 1, sizeof(MAGIC), fi); /* get magic no. */ |
| 87 | if (MAGIC == ARMAG) |
| 88 | arch_flg++; |
| 89 | else if (BADMAG) { |
| 90 | fprintf(stderr, "nm: %s-- bad format\n", *argv); |
| 91 | continue; |
| 92 | } |
| 93 | fseek(fi, 0L, 0); |
| 94 | if (arch_flg) { |
| 95 | nextel(fi); |
| 96 | if (narg > 1) |
| 97 | printf("\n%s:\n", *argv); |
| 98 | } |
| 99 | do { |
| 100 | long o; |
| 101 | register i, n, c; |
| 102 | struct nlist *symp = NULL; |
| 103 | struct nlist sym; |
| 104 | |
| 105 | fread((char *)&exp, 1, sizeof(struct exec), fi); |
| 106 | if (BADMAG) /* archive element not in */ |
| 107 | continue; /* proper format - skip it */ |
| 108 | o = (long)exp.a_text + exp.a_data + exp.a_trsize + exp.a_drsize; |
| 109 | if (MAGIC==0412 || MAGIC==0413) |
| 110 | o += PAGSIZ - sizeof(struct exec); |
| 111 | fseek(fi, o, 1); |
| 112 | n = exp.a_syms / sizeof(struct nlist); |
| 113 | if (n == 0) { |
| 114 | fprintf(stderr, "nm: %s-- no name list\n", SELECT); |
| 115 | continue; |
| 116 | } |
| 117 | i = 0; |
| 118 | while (--n >= 0) { |
| 119 | fread((char *)&sym, 1, sizeof(sym), fi); |
| 120 | if (globl_flg && (sym.n_type&N_EXT)==0) |
| 121 | continue; |
| 122 | if (symp==NULL) |
| 123 | symp = (struct nlist *)malloc(sizeof(struct nlist)); |
| 124 | else { |
| 125 | symp = (struct nlist *)realloc(symp, (i+1)*sizeof(struct nlist)); |
| 126 | } |
| 127 | if (symp == NULL) { |
| 128 | fprintf(stderr, "nm: out of memory on %s\n", *argv); |
| 129 | exit(2); |
| 130 | } |
| 131 | symp[i++] = sym; |
| 132 | } |
| 133 | if (nosort_flg==0) |
| 134 | qsort(symp, i, sizeof(struct nlist), compare); |
| 135 | if ((arch_flg || narg>1) && prep_flg==0) |
| 136 | printf("\n%s:\n", SELECT); |
| 137 | for (n=0; n<i; n++) { |
| 138 | if (prep_flg) { |
| 139 | if (arch_flg) |
| 140 | printf("%s:", *argv); |
| 141 | printf("%s:", SELECT); |
| 142 | } |
| 143 | c = symp[n].n_type; |
| 144 | |
| 145 | if (c & STABTYPE) { |
| 146 | printf("%08x - %-8.8s %02x %02x %04x\n", |
| 147 | symp[n].n_value, |
| 148 | symp[n].n_name, |
| 149 | symp[n].n_type & 0xff, |
| 150 | symp[n].n_other & 0xff, |
| 151 | symp[n].n_desc & 0xffff); |
| 152 | continue; |
| 153 | } |
| 154 | switch (c&(N_TYPE-N_EXT)) { |
| 155 | |
| 156 | case N_UNDF: |
| 157 | c = 'u'; |
| 158 | if (symp[n].n_value) |
| 159 | c = 'c'; |
| 160 | break; |
| 161 | |
| 162 | case N_ABS: |
| 163 | c = 'a'; |
| 164 | break; |
| 165 | |
| 166 | case N_TEXT: |
| 167 | c = 't'; |
| 168 | break; |
| 169 | |
| 170 | case N_DATA: |
| 171 | c = 'd'; |
| 172 | break; |
| 173 | |
| 174 | case N_BSS: |
| 175 | c = 'b'; |
| 176 | break; |
| 177 | |
| 178 | case N_FN: |
| 179 | c = 'f'; |
| 180 | break; |
| 181 | |
| 182 | /* |
| 183 | case N_REG: |
| 184 | c = 'r'; |
| 185 | break; |
| 186 | */ |
| 187 | } |
| 188 | if (undef_flg && c!='u') |
| 189 | continue; |
| 190 | if (symp[n].n_type&N_EXT) |
| 191 | c = toupper(c); |
| 192 | if (!undef_flg) { |
| 193 | if (c=='u' || c=='U') |
| 194 | printf(" "); |
| 195 | else |
| 196 | printf(FORMAT, symp[n].n_value); |
| 197 | printf(" %c ", c); |
| 198 | } |
| 199 | printf("%.8s\n", symp[n].n_name); |
| 200 | l1:; } |
| 201 | if (symp) |
| 202 | free((char *)symp); |
| 203 | } while(arch_flg && nextel(fi)); |
| 204 | fclose(fi); |
| 205 | } |
| 206 | exit(0); |
| 207 | } |
| 208 | |
| 209 | compare(p1, p2) |
| 210 | struct nlist *p1, *p2; |
| 211 | { |
| 212 | register i; |
| 213 | |
| 214 | if (numsort_flg) { |
| 215 | if (p1->n_value > p2->n_value) |
| 216 | return(revsort_flg); |
| 217 | if (p1->n_value < p2->n_value) |
| 218 | return(-revsort_flg); |
| 219 | } |
| 220 | for(i=0; i<sizeof(p1->n_name); i++) |
| 221 | if (p1->n_name[i] != p2->n_name[i]) { |
| 222 | if (p1->n_name[i] > p2->n_name[i]) |
| 223 | return(revsort_flg); |
| 224 | else |
| 225 | return(-revsort_flg); |
| 226 | } |
| 227 | return(0); |
| 228 | } |
| 229 | |
| 230 | nextel(af) |
| 231 | FILE *af; |
| 232 | { |
| 233 | register r; |
| 234 | |
| 235 | fseek(af, off, 0); |
| 236 | r = fread((char *)&arp, 1, sizeof(struct ar_hdr), af); /* read archive header */ |
| 237 | if (r <= 0) |
| 238 | return(0); |
| 239 | if (arp.ar_size & 1) |
| 240 | ++arp.ar_size; |
| 241 | off = ftell(af) + arp.ar_size; /* offset to next element */ |
| 242 | return(1); |
| 243 | } |