2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
11 * cfgexport - load/configure the EXPORT kernel extension
13 #include <afsconfig.h>
14 #include <afs/param.h>
21 #include <sys/types.h>
22 #include <sys/device.h>
23 #include <sys/sysconfig.h>
25 #include <sys/xcoff.h>
32 extern char *malloc(), *optarg;
33 extern int sysconfig(int cmd, void *arg, int len);
39 #include "AFS_component_version_number.c"
43 register add, del, opts;
47 struct cfg_load cload;
54 * The following signal action for AIX is necessary so that in case of a
55 * crash (i.e. core is generated) we can include the user's data section
56 * in the core dump. Unfortunately, by default, only a partial core is
57 * generated which, in many cases, isn't too useful.
61 sigemptyset(&nsa.sa_mask);
62 nsa.sa_handler = SIG_DFL;
63 nsa.sa_flags = SA_FULLDUMP;
64 sigaction(SIGSEGV, &nsa, NULL);
68 while ((c = getopt(argc, argv, "a:s:Z:d:")) != EOF) {
70 case 'Z': /* Zdebug option */
105 buf[0] = "execerror";
106 buf[1] = "cfgexport";
107 get_syms(&conf, syms);
110 if (sysconfig(SYS_KLOAD, &cload, sizeof(cload)) == -1) {
111 loadquery(L_GETMESSAGES, &buf[2], sizeof buf - 8);
112 execvp("/etc/execerror", buf);
117 cmod.kmid = cload.kmid;
119 cmod.mdiptr = (caddr_t) &conf;
120 cmod.mdilen = sizeof (conf);
122 if (sysconfig(SYS_CFGKMOD, &cmod, sizeof(cmod)) == -1) {
123 perror("SYS_CFGKMOD");
124 cload.kmid = cload.kmid;
125 sysconfig(SYS_KULOAD, &cload, sizeof(cload));
129 printf("cfgexport -d 0x%x # to remove EXPORT\n", cload.kmid);
131 strcpy(PidFile, file);
132 strcat(PidFile, ".kmid");
133 fp = fopen(PidFile, "w");
135 (void) fprintf(fp, "%d\n", cload.kmid);
138 printf("Can't open for write file %s (error=%d); ignored\n", PidFile, errno);
144 strcpy(PidFile, file);
145 strcat(PidFile, ".kmid");
146 fp = fopen(PidFile, "r");
148 printf("Can't read %s file (error=%d); aborting\n", PidFile, errno);
151 (void) fscanf(fp, "%d\n", &kmid);
159 if (sysconfig(SYS_CFGKMOD, &cmod, sizeof(cmod)) == -1) {
160 perror("SYS_CFGKMOD");
165 if (sysconfig(SYS_KULOAD, &cload, sizeof(cload)) == -1) {
166 perror("SYS_KULOAD");
175 error("usage: cfgexport [-a mod_file [-s symbols]] [-d mod_file]\n");
179 * get_syms - get kernel symbol table info.
182 * conf - ^ to EXPORT extension configuration struct
183 * syms - ^ to name of file containing XCOFF symbols
189 sym_t *k_symtab, *ksp;
190 struct syment *x_symtab, *xsp, *xsq;
192 struct xcoffhdr hdr; /* XCOFF header from symbol file*/
193 sym_t k_sym; /* export version of symbol */
194 struct syment xcoff_sym; /* xcoff version of symbol */
195 int i, nsyms, nksyms, nxsyms = 0;
196 int xstr_size, kstr_size;
200 fp = fopen(syms, "r");
204 if (fread(&hdr, sizeof (hdr), 1, fp) != 1)
207 if (hdr.filehdr.f_nsyms == 0)
208 error("%s: no symbols", syms);
210 switch (hdr.filehdr.f_magic) {
223 error("%s: funny magic number 0%o"
224 , syms, hdr.filehdr.f_magic);
227 nsyms = hdr.filehdr.f_nsyms;
229 printf("nsyms = %d\n", nsyms);
231 x_symtab = (struct syment *) malloc(nsyms * SYMESZ);
233 error("no memory for symbol table");
236 * try to snarf the string table: should be just past the
237 * symbol table: first 4 bytes is length of rest.
239 if (fseek(fp, hdr.filehdr.f_symptr + nsyms * SYMESZ, 0) < 0)
240 sys_error("%s: seek to strtab", syms);
242 if (fread(&xstr_size, sizeof (xstr_size), 1, fp) != 1)
243 error("%s: reading string table size", syms);
245 xstrings = malloc(xstr_size + sizeof (xstr_size));
247 error("no memory for string table");
250 * seek back to the start of the strings
252 if (fseek(fp, hdr.filehdr.f_symptr + nsyms * SYMESZ, 0) < 0)
253 sys_error("%s: seek to strtab", syms);
255 if (fread(xstrings, sizeof (*xstrings), xstr_size, fp) != xstr_size)
256 error("%s: reading string table");
259 * now seek back to the start of the symbol table, and read it
262 if (fseek(fp, hdr.filehdr.f_symptr, 0) < 0)
263 sys_error("%s: seek to symtab", syms);
267 for (i = nxsyms = 0; i < nsyms; ++i) {
270 if (fread(&xcoff_sym, SYMESZ, 1, fp) != 1)
271 error("%s: reading symbol entry", syms);
274 p = xstrings + xcoff_sym.n_offset;
276 if (xcoff_sym.n_zeroes == 0) {
278 * Need to relocate string table offset
280 p = xcoff_sym.n_nptr = xstrings + xcoff_sym.n_offset;
282 strncpy(name, xcoff_sym.n_name, 8);
289 dump_xsym(&xcoff_sym);
291 switch (xcoff_sym.n_sclass) {
292 case C_EXT: /* external */
293 case C_HIDEXT: /* hidden external (sic) */
295 * filtre out the ones with the strange names
297 if (strchr(p, '@') || strchr(p, '$') || p[0] == 0)
304 dump_xsym(&xcoff_sym);
309 if (xcoff_sym.n_numaux) {
310 fseek(fp, xcoff_sym.n_numaux * AUXESZ, 1);
311 i += xcoff_sym.n_numaux;
318 * sort the symbol table
320 qsort((char *) x_symtab, nxsyms, sizeof (*x_symtab), xsym_compar);
323 * we will need no more than `nxsyms' symbols.
325 k_symtab = (sym_t *) malloc(nxsyms * sizeof (sym_t));
327 error("no memory for EXPORT symbol table");
330 * uniquify it, and xlate to funny EXPORT format
332 xsp = xsq = x_symtab;
338 memset(xsq = &xcoff_sym, 0, sizeof (*xsq));
340 for (i = 1; i < nxsyms; ++i, xsq = xsp++) {
342 if (xsp->n_offset != xsq->n_offset
343 || xsp->n_value != xsq->n_value) {
345 if (xsp->n_zeroes != xsq->n_zeroes
346 || xsp->n_offset != xsq->n_offset
347 || xsp->n_value != xsq->n_value) {
349 xlate_xtok(xsp, ksp++, &kstrings, &kstr_size);
355 * place the symbol table info into the `conf' data structure
357 * XXXXX: for today only, leave the string table the same.
359 conf->nsyms = nksyms;
360 conf->symt_sz = nksyms * sizeof (sym_t);
361 conf->str_sz = kstr_size;
362 conf->symtab = (caddr_t) k_symtab;
363 conf->strtab = kstrings;
368 * xlate_xtok - xlate XCOFF to EXPORT format
371 * xp - ^ to XCOFF symbol
372 * kp - ^ to EXPORT symbol save area
373 * strp - ^ to ^ to EXPORT string table
374 * szp - ^ to EXPORT string table size
376 xlate_xtok(xp, kp, strp, szp)
377 register struct syment *xp;
382 static char *export_strings, *prev = "";
383 static left, offset, sz;
385 if (!export_strings) {
386 export_strings = malloc(sz=1024);
388 error("no memory for EXPORT string table");
390 *strp = export_strings;
391 *szp = offset = sizeof (uint);
392 left = 1024 - offset;
394 export_strings += offset;
396 *(uint *) export_strings = 0; /* initial 4 bytes */
400 if (strcmp(prev, xstrings + xp->n_offset) == 0) {
402 * same name as previous entry: just use previous
404 kp->n_offset = offset - strlen( *strp + xp->n_offset) - 1;
405 } else if (find_suffix(xstrings + xp->n_offset, *strp, offset, &kp->n_offset)) {
407 * found a string that we are a suffix of
412 * need to add to our string table
414 len = strlen(xstrings + xp->n_offset) + 1;
415 while (len >= left) {
416 export_strings = (char *)realloc(*strp, sz += 1024);
418 error("no memory for EXPORT string table");
419 *strp = export_strings;
421 prev = ""; /* lazy */
424 strcpy(prev = *strp + offset, xstrings + xp->n_offset);
426 kp->n_offset = offset;
432 if (kp->n_zeroes = xp->n_zeroes) { /* sic */
433 kp->n_zeroes = xp->n_zeroes;
434 kp->n_offset = xp->n_offset;
435 } else if (strcmp(prev, xp->n_nptr) == 0) {
437 * same name as previous entry: just use previous
439 kp->n_offset = offset - strlen(xp->n_nptr) - 1;
440 } else if (find_suffix(xp->n_nptr, *strp, offset, &kp->n_offset)) {
442 * found a string that we are a suffix of
447 * need to add to our string table
449 len = strlen(xp->n_nptr) + 1;
450 while (len >= left) {
451 export_strings = (char *)realloc(*strp, sz += 1024);
453 error("no memory for EXPORT string table");
454 *strp = export_strings;
456 prev = ""; /* lazy */
459 strcpy(prev = *strp + offset, xp->n_nptr);
461 kp->n_offset = offset;
468 kp->n_value = xp->n_value;
471 dump_ksym(kp, *strp);
475 * find_suffix - look for a string that arg string is suffix of
478 * p - ^ to string we hope is a suffix of another
479 * strings - ^ to string table
480 * max - max offset of valid string in strings
481 * offp - ^ to place to store offset, if containing string found
484 * 0 - no containing string found
485 * !0 - string found of which `p' is a suffix
488 * This is rather inefficient.
490 find_suffix(p, strings, max, offp)
491 register char *p, *strings;
493 register char *q, *e;
494 register len = strlen(p) - 1;
496 strings += sizeof (uint);
497 max -= sizeof (uint);
499 for (e = strings + max; e > strings; ) {
501 * adjust `e' to point at last non-blank
508 for (q = p + len; q > p && *q == *e; )
513 printf("found_suffix: %s\n", p);
514 return *offp = e - strings + sizeof (uint);
518 while (*e && e > strings)
526 * xsym_compar - compare two XCOFF symbol table entries
528 * If the names are the same, sort by descending storage class, so that
532 register struct syment *xp, *xq; {
533 register char *p, *q;
537 p = (xp->n_zeroes ? xp->n_name : xp->n_nptr);
538 q = (xq->n_zeroes ? xq->n_name : xq->n_nptr);
540 if (xp->n_zeroes || xq->n_zeroes)
541 compar = strncmp(p, q, 8);
544 p = xstrings + xp->n_offset;
545 q = xstrings + xq->n_offset;
547 compar = strcmp(p, q);
550 compar = xp->n_sclass - xq->n_sclass;
556 * dump_xsym - print to XCOFF symbol
559 struct syment *xsp; {
564 "nptr <%-8.8s %8.8s> val %8.8x sc# %4.4x type %4.4x sclass %2.2x naux %2.2x\n"
568 , xsp->n_scnum & 0xffff
576 "nptr <%-17.17s> val %8.8x sc# %4.4x type %4.4x sclass %2.2x naux %2.2x\n"
578 , xstrings + xsp->n_offset
583 , xsp->n_scnum & 0xffff
589 dump_ksym(ksp, strings)
595 printf("%8.8x %-8.8s\n", ksp->n_value, ksp->n_name);
598 printf("%8.8x %s\n", ksp->n_value, ksp->n_offset + strings);
601 error(p, a, b, c, d, e)
604 fprintf(stderr, p, a, b, c, d, e);
605 fprintf(stderr, "\n");
609 sys_error(p, a, b, c, d, e)
613 fprintf(stderr, p, a, b, c, d, e);
618 warn(p, a, b, c, d, e)
622 fprintf(stderr, p, a, b, c, d, e);
623 fprintf(stderr, "\n");