Commit | Line | Data |
a0d0e21e |
1 | /* dl_aix.xs |
2 | * |
3 | * Written: 8/31/94 by Wayne Scott (wscott@ichips.intel.com) |
4 | * |
5 | * All I did was take Jens-Uwe Mager's libdl emulation library for |
6 | * AIX and merged it with the dl_dlopen.xs file to create a dynamic library |
7 | * package that works for AIX. |
8 | * |
9 | * I did change all malloc's, free's, strdup's, calloc's to use the perl |
10 | * equilvant. I also removed some stuff we will not need. Call fini() |
11 | * on statup... It can probably be trimmed more. |
12 | */ |
13 | |
077440d8 |
14 | #define PERLIO_NOT_STDIO 0 |
15 | |
a0d0e21e |
16 | /* |
17 | * @(#)dlfcn.c 1.5 revision of 93/02/14 20:14:17 |
18 | * This is an unpublished work copyright (c) 1992 Helios Software GmbH |
19 | * 3000 Hannover 1, Germany |
20 | */ |
21 | #include "EXTERN.h" |
22 | #include "perl.h" |
23 | #include "XSUB.h" |
24 | |
19e194ad |
25 | /* When building as a 64-bit binary on AIX, define this to get the |
26 | * correct structure definitions. Also determines the field-name |
27 | * macros and gates some logic in readEntries(). -- Steven N. Hirsch |
28 | * <hirschs@btv.ibm.com> */ |
29 | #ifdef USE_64_BIT_ALL |
30 | # define __XCOFF64__ |
31 | # define __XCOFF32__ |
32 | #endif |
33 | |
a0d0e21e |
34 | #include <stdio.h> |
35 | #include <errno.h> |
36 | #include <string.h> |
37 | #include <stdlib.h> |
38 | #include <sys/types.h> |
39 | #include <sys/ldr.h> |
40 | #include <a.out.h> |
7ca86468 |
41 | #undef FREAD |
42 | #undef FWRITE |
a0d0e21e |
43 | #include <ldfcn.h> |
44 | |
19e194ad |
45 | #ifdef USE_64_BIT_ALL |
46 | # define AIX_SCNHDR SCNHDR_64 |
47 | # define AIX_LDHDR LDHDR_64 |
48 | # define AIX_LDSYM LDSYM_64 |
49 | # define AIX_LDHDRSZ LDHDRSZ_64 |
50 | #else |
51 | # define AIX_SCNHDR SCNHDR |
52 | # define AIX_LDHDR LDHDR |
53 | # define AIX_LDSYM LDSYM |
54 | # define AIX_LDHDRSZ LDHDRSZ |
55 | #endif |
56 | |
4e774c84 |
57 | /* When using Perl extensions written in C++ the longer versions |
58 | * of load() and unload() from libC and libC_r need to be used, |
59 | * otherwise statics in the extensions won't get initialized right. |
60 | * -- Stephanie Beals <bealzy@us.ibm.com> */ |
bab3591f |
61 | |
62 | /* Older AIX C compilers cannot deal with C++ double-slash comments in |
63 | the ibmcxx and/or xlC includes. Since we only need a single file, |
64 | be more fine-grained about what's included <hirschs@btv.ibm.com> */ |
c88be79f |
65 | #ifdef USE_libC /* The define comes, when it comes, from hints/aix.pl. */ |
66 | # define LOAD loadAndInit |
4e774c84 |
67 | # define UNLOAD terminateAndUnload |
bab3591f |
68 | # if defined(USE_xlC_load_h) |
69 | # include "/usr/lpp/xlC/include/load.h" |
70 | # elif defined(USE_ibmcxx_load_h) |
71 | # include "/usr/ibmcxx/include/load.h" |
c88be79f |
72 | # endif |
4e774c84 |
73 | #else |
74 | # define LOAD load |
75 | # define UNLOAD unload |
76 | #endif |
77 | |
ee580363 |
78 | /* |
79 | * AIX 4.3 does remove some useful definitions from ldfcn.h. Define |
80 | * these here to compensate for that lossage. |
81 | */ |
82 | #ifndef BEGINNING |
83 | # define BEGINNING SEEK_SET |
84 | #endif |
85 | #ifndef FSEEK |
86 | # define FSEEK(ldptr,o,p) fseek(IOPTR(ldptr),(p==BEGINNING)?(OFFSET(ldptr) +o):o,p) |
87 | #endif |
88 | #ifndef FREAD |
89 | # define FREAD(p,s,n,ldptr) fread(p,s,n,IOPTR(ldptr)) |
90 | #endif |
91 | |
a0d0e21e |
92 | /* |
93 | * We simulate dlopen() et al. through a call to load. Because AIX has |
94 | * no call to find an exported symbol we read the loader section of the |
95 | * loaded module and build a list of exported symbols and their virtual |
96 | * address. |
97 | */ |
98 | |
99 | typedef struct { |
100 | char *name; /* the symbols's name */ |
101 | void *addr; /* its relocated virtual address */ |
102 | } Export, *ExportPtr; |
103 | |
104 | /* |
105 | * The void * handle returned from dlopen is actually a ModulePtr. |
106 | */ |
107 | typedef struct Module { |
108 | struct Module *next; |
109 | char *name; /* module name for refcounting */ |
110 | int refCnt; /* the number of references */ |
111 | void *entry; /* entry point from load */ |
112 | int nExports; /* the number of exports found */ |
113 | ExportPtr exports; /* the array of exports */ |
114 | } Module, *ModulePtr; |
115 | |
116 | /* |
7ca86468 |
117 | * We keep a list of all loaded modules to be able to reference count |
118 | * duplicate dlopen's. |
a0d0e21e |
119 | */ |
549a6b10 |
120 | static ModulePtr modList; /* XXX threaded */ |
a0d0e21e |
121 | |
122 | /* |
123 | * The last error from one of the dl* routines is kept in static |
124 | * variables here. Each error is returned only once to the caller. |
125 | */ |
549a6b10 |
126 | static char errbuf[BUFSIZ]; /* XXX threaded */ |
127 | static int errvalid; /* XXX threaded */ |
a0d0e21e |
128 | |
129 | static void caterr(char *); |
130 | static int readExports(ModulePtr); |
7ca86468 |
131 | static void *findMain(void); |
a0d0e21e |
132 | |
ce637636 |
133 | static char *strerror_failed = "(strerror failed)"; |
134 | static char *strerror_r_failed = "(strerror_r failed)"; |
135 | |
fd206186 |
136 | char *strerrorcat(char *str, int err) { |
ce637636 |
137 | int strsiz = strlen(str); |
138 | int msgsiz; |
139 | char *msg; |
140 | |
141 | #ifdef USE_THREADS |
142 | char *buf = malloc(BUFSIZ); |
143 | |
144 | if (buf == 0) |
145 | return 0; |
549a6b10 |
146 | if (strerror_r(err, buf, BUFSIZ) == 0) |
ce637636 |
147 | msg = buf; |
148 | else |
149 | msg = strerror_r_failed; |
150 | msgsiz = strlen(msg); |
151 | if (strsiz + msgsiz < BUFSIZ) |
152 | strcat(str, msg); |
153 | free(buf); |
154 | #else |
155 | if ((msg = strerror(err)) == 0) |
156 | msg = strerror_failed; |
157 | msgsiz = strlen(msg); /* Note msg = buf and free() above. */ |
158 | if (strsiz + msgsiz < BUFSIZ) /* Do not move this after #endif. */ |
159 | strcat(str, msg); |
160 | #endif |
161 | |
fd206186 |
162 | return str; |
163 | } |
ce637636 |
164 | |
fd206186 |
165 | char *strerrorcpy(char *str, int err) { |
ce637636 |
166 | int msgsiz; |
167 | char *msg; |
168 | |
169 | #ifdef USE_THREADS |
170 | char *buf = malloc(BUFSIZ); |
171 | |
172 | if (buf == 0) |
173 | return 0; |
549a6b10 |
174 | if (strerror_r(err, buf, BUFSIZ) == 0) |
ce637636 |
175 | msg = buf; |
176 | else |
177 | msg = strerror_r_failed; |
178 | msgsiz = strlen(msg); |
179 | if (msgsiz < BUFSIZ) |
180 | strcpy(str, msg); |
181 | free(buf); |
182 | #else |
183 | if ((msg = strerror(err)) == 0) |
184 | msg = strerror_failed; |
185 | msgsiz = strlen(msg); /* Note msg = buf and free() above. */ |
186 | if (msgsiz < BUFSIZ) /* Do not move this after #endif. */ |
187 | strcpy(str, msg); |
188 | #endif |
189 | |
fd206186 |
190 | return str; |
191 | } |
a0d0e21e |
192 | |
193 | /* ARGSUSED */ |
194 | void *dlopen(char *path, int mode) |
195 | { |
5b877257 |
196 | dTHX; |
a0d0e21e |
197 | register ModulePtr mp; |
7ca86468 |
198 | static void *mainModule; /* XXX threaded */ |
a0d0e21e |
199 | |
200 | /* |
201 | * Upon the first call register a terminate handler that will |
f6b3007c |
202 | * close all libraries. |
a0d0e21e |
203 | */ |
7ca86468 |
204 | if (mainModule == NULL) { |
205 | if ((mainModule = findMain()) == NULL) |
206 | return NULL; |
a0d0e21e |
207 | } |
208 | /* |
209 | * Scan the list of modules if have the module already loaded. |
210 | */ |
211 | for (mp = modList; mp; mp = mp->next) |
212 | if (strcmp(mp->name, path) == 0) { |
213 | mp->refCnt++; |
214 | return mp; |
215 | } |
216 | Newz(1000,mp,1,Module); |
217 | if (mp == NULL) { |
218 | errvalid++; |
219 | strcpy(errbuf, "Newz: "); |
fd206186 |
220 | strerrorcat(errbuf, errno); |
a0d0e21e |
221 | return NULL; |
222 | } |
223 | |
224 | if ((mp->name = savepv(path)) == NULL) { |
225 | errvalid++; |
226 | strcpy(errbuf, "savepv: "); |
fd206186 |
227 | strerrorcat(errbuf, errno); |
a0d0e21e |
228 | safefree(mp); |
229 | return NULL; |
230 | } |
549a6b10 |
231 | |
a0d0e21e |
232 | /* |
233 | * load should be declared load(const char *...). Thus we |
234 | * cast the path to a normal char *. Ugly. |
235 | */ |
4e774c84 |
236 | if ((mp->entry = (void *)LOAD((char *)path, |
549a6b10 |
237 | #ifdef L_LIBPATH_EXEC |
238 | L_LIBPATH_EXEC | |
239 | #endif |
240 | L_NOAUTODEFER, |
241 | NULL)) == NULL) { |
242 | int saverrno = errno; |
243 | |
a0d0e21e |
244 | safefree(mp->name); |
245 | safefree(mp); |
246 | errvalid++; |
247 | strcpy(errbuf, "dlopen: "); |
248 | strcat(errbuf, path); |
249 | strcat(errbuf, ": "); |
250 | /* |
251 | * If AIX says the file is not executable, the error |
252 | * can be further described by querying the loader about |
253 | * the last error. |
254 | */ |
549a6b10 |
255 | if (saverrno == ENOEXEC) { |
256 | char *moreinfo[BUFSIZ/sizeof(char *)]; |
257 | if (loadquery(L_GETMESSAGES, moreinfo, sizeof(moreinfo)) == -1) |
258 | strerrorcpy(errbuf, saverrno); |
a0d0e21e |
259 | else { |
260 | char **p; |
549a6b10 |
261 | for (p = moreinfo; *p; p++) |
a0d0e21e |
262 | caterr(*p); |
263 | } |
264 | } else |
549a6b10 |
265 | strerrorcat(errbuf, saverrno); |
a0d0e21e |
266 | return NULL; |
267 | } |
268 | mp->refCnt = 1; |
269 | mp->next = modList; |
270 | modList = mp; |
f6b3007c |
271 | /* |
272 | * Assume anonymous exports come from the module this dlopen |
273 | * is linked into, that holds true as long as dlopen and all |
7ca86468 |
274 | * of the perl core are in the same shared object. Also bind |
275 | * against the main part, in the case a perl is not the main |
276 | * part, e.g mod_perl as DSO in Apache so perl modules can |
277 | * also reference Apache symbols. |
f6b3007c |
278 | */ |
7ca86468 |
279 | if (loadbind(0, (void *)dlopen, mp->entry) == -1 || |
280 | loadbind(0, mainModule, mp->entry)) { |
549a6b10 |
281 | int saverrno = errno; |
282 | |
a0d0e21e |
283 | dlclose(mp); |
284 | errvalid++; |
285 | strcpy(errbuf, "loadbind: "); |
549a6b10 |
286 | strerrorcat(errbuf, saverrno); |
a0d0e21e |
287 | return NULL; |
288 | } |
289 | if (readExports(mp) == -1) { |
290 | dlclose(mp); |
291 | return NULL; |
292 | } |
293 | return mp; |
294 | } |
295 | |
296 | /* |
297 | * Attempt to decipher an AIX loader error message and append it |
298 | * to our static error message buffer. |
299 | */ |
300 | static void caterr(char *s) |
301 | { |
302 | register char *p = s; |
303 | |
304 | while (*p >= '0' && *p <= '9') |
305 | p++; |
306 | switch(atoi(s)) { |
307 | case L_ERROR_TOOMANY: |
308 | strcat(errbuf, "to many errors"); |
309 | break; |
310 | case L_ERROR_NOLIB: |
311 | strcat(errbuf, "can't load library"); |
312 | strcat(errbuf, p); |
313 | break; |
314 | case L_ERROR_UNDEF: |
315 | strcat(errbuf, "can't find symbol"); |
316 | strcat(errbuf, p); |
317 | break; |
318 | case L_ERROR_RLDBAD: |
319 | strcat(errbuf, "bad RLD"); |
320 | strcat(errbuf, p); |
321 | break; |
322 | case L_ERROR_FORMAT: |
323 | strcat(errbuf, "bad exec format in"); |
324 | strcat(errbuf, p); |
325 | break; |
326 | case L_ERROR_ERRNO: |
fd206186 |
327 | strerrorcat(errbuf, atoi(++p)); |
a0d0e21e |
328 | break; |
329 | default: |
330 | strcat(errbuf, s); |
331 | break; |
332 | } |
333 | } |
334 | |
335 | void *dlsym(void *handle, const char *symbol) |
336 | { |
337 | register ModulePtr mp = (ModulePtr)handle; |
338 | register ExportPtr ep; |
339 | register int i; |
340 | |
341 | /* |
342 | * Could speed up search, but I assume that one assigns |
343 | * the result to function pointers anyways. |
344 | */ |
345 | for (ep = mp->exports, i = mp->nExports; i; i--, ep++) |
346 | if (strcmp(ep->name, symbol) == 0) |
347 | return ep->addr; |
348 | errvalid++; |
349 | strcpy(errbuf, "dlsym: undefined symbol "); |
350 | strcat(errbuf, symbol); |
351 | return NULL; |
352 | } |
353 | |
354 | char *dlerror(void) |
355 | { |
356 | if (errvalid) { |
357 | errvalid = 0; |
358 | return errbuf; |
359 | } |
360 | return NULL; |
361 | } |
362 | |
363 | int dlclose(void *handle) |
364 | { |
365 | register ModulePtr mp = (ModulePtr)handle; |
366 | int result; |
367 | register ModulePtr mp1; |
368 | |
369 | if (--mp->refCnt > 0) |
370 | return 0; |
4e774c84 |
371 | result = UNLOAD(mp->entry); |
a0d0e21e |
372 | if (result == -1) { |
373 | errvalid++; |
fd206186 |
374 | strerrorcpy(errbuf, errno); |
a0d0e21e |
375 | } |
376 | if (mp->exports) { |
377 | register ExportPtr ep; |
378 | register int i; |
379 | for (ep = mp->exports, i = mp->nExports; i; i--, ep++) |
380 | if (ep->name) |
381 | safefree(ep->name); |
382 | safefree(mp->exports); |
383 | } |
384 | if (mp == modList) |
385 | modList = mp->next; |
386 | else { |
387 | for (mp1 = modList; mp1; mp1 = mp1->next) |
388 | if (mp1->next == mp) { |
389 | mp1->next = mp->next; |
390 | break; |
391 | } |
392 | } |
393 | safefree(mp->name); |
394 | safefree(mp); |
395 | return result; |
396 | } |
397 | |
a0d0e21e |
398 | /* Added by Wayne Scott |
399 | * This is needed because the ldopen system call calls |
400 | * calloc to allocated a block of date. The ldclose call calls free. |
401 | * Without this we get this system calloc and perl's free, resulting |
402 | * in a "Bad free" message. This way we always use perl's malloc. |
403 | */ |
404 | void *calloc(size_t ne, size_t sz) |
405 | { |
406 | void *out; |
407 | |
408 | out = (void *) safemalloc(ne*sz); |
409 | memzero(out, ne*sz); |
410 | return(out); |
411 | } |
412 | |
413 | /* |
414 | * Build the export table from the XCOFF .loader section. |
415 | */ |
416 | static int readExports(ModulePtr mp) |
417 | { |
5b877257 |
418 | dTHX; |
a0d0e21e |
419 | LDFILE *ldp = NULL; |
19e194ad |
420 | AIX_SCNHDR sh; |
421 | AIX_LDHDR *lhp; |
a0d0e21e |
422 | char *ldbuf; |
19e194ad |
423 | AIX_LDSYM *ls; |
a0d0e21e |
424 | int i; |
425 | ExportPtr ep; |
426 | |
427 | if ((ldp = ldopen(mp->name, ldp)) == NULL) { |
428 | struct ld_info *lp; |
429 | char *buf; |
430 | int size = 4*1024; |
431 | if (errno != ENOENT) { |
432 | errvalid++; |
433 | strcpy(errbuf, "readExports: "); |
fd206186 |
434 | strerrorcat(errbuf, errno); |
a0d0e21e |
435 | return -1; |
436 | } |
437 | /* |
438 | * The module might be loaded due to the LIBPATH |
439 | * environment variable. Search for the loaded |
440 | * module using L_GETINFO. |
441 | */ |
442 | if ((buf = safemalloc(size)) == NULL) { |
443 | errvalid++; |
444 | strcpy(errbuf, "readExports: "); |
fd206186 |
445 | strerrorcat(errbuf, errno); |
a0d0e21e |
446 | return -1; |
447 | } |
448 | while ((i = loadquery(L_GETINFO, buf, size)) == -1 && errno == ENOMEM) { |
449 | safefree(buf); |
450 | size += 4*1024; |
451 | if ((buf = safemalloc(size)) == NULL) { |
452 | errvalid++; |
453 | strcpy(errbuf, "readExports: "); |
fd206186 |
454 | strerrorcat(errbuf, errno); |
a0d0e21e |
455 | return -1; |
456 | } |
457 | } |
458 | if (i == -1) { |
459 | errvalid++; |
460 | strcpy(errbuf, "readExports: "); |
fd206186 |
461 | strerrorcat(errbuf, errno); |
a0d0e21e |
462 | safefree(buf); |
463 | return -1; |
464 | } |
465 | /* |
466 | * Traverse the list of loaded modules. The entry point |
4e774c84 |
467 | * returned by LOAD() does actually point to the data |
a0d0e21e |
468 | * segment origin. |
469 | */ |
470 | lp = (struct ld_info *)buf; |
471 | while (lp) { |
472 | if (lp->ldinfo_dataorg == mp->entry) { |
473 | ldp = ldopen(lp->ldinfo_filename, ldp); |
474 | break; |
475 | } |
476 | if (lp->ldinfo_next == 0) |
477 | lp = NULL; |
478 | else |
479 | lp = (struct ld_info *)((char *)lp + lp->ldinfo_next); |
480 | } |
481 | safefree(buf); |
482 | if (!ldp) { |
483 | errvalid++; |
484 | strcpy(errbuf, "readExports: "); |
fd206186 |
485 | strerrorcat(errbuf, errno); |
a0d0e21e |
486 | return -1; |
487 | } |
488 | } |
19e194ad |
489 | #ifdef USE_64_BIT_ALL |
490 | if (TYPE(ldp) != U803XTOCMAGIC) { |
491 | #else |
a0d0e21e |
492 | if (TYPE(ldp) != U802TOCMAGIC) { |
19e194ad |
493 | #endif |
a0d0e21e |
494 | errvalid++; |
495 | strcpy(errbuf, "readExports: bad magic"); |
496 | while(ldclose(ldp) == FAILURE) |
497 | ; |
498 | return -1; |
499 | } |
500 | if (ldnshread(ldp, _LOADER, &sh) != SUCCESS) { |
501 | errvalid++; |
502 | strcpy(errbuf, "readExports: cannot read loader section header"); |
503 | while(ldclose(ldp) == FAILURE) |
504 | ; |
505 | return -1; |
506 | } |
507 | /* |
508 | * We read the complete loader section in one chunk, this makes |
509 | * finding long symbol names residing in the string table easier. |
510 | */ |
511 | if ((ldbuf = (char *)safemalloc(sh.s_size)) == NULL) { |
512 | errvalid++; |
513 | strcpy(errbuf, "readExports: "); |
fd206186 |
514 | strerrorcat(errbuf, errno); |
a0d0e21e |
515 | while(ldclose(ldp) == FAILURE) |
516 | ; |
517 | return -1; |
518 | } |
519 | if (FSEEK(ldp, sh.s_scnptr, BEGINNING) != OKFSEEK) { |
520 | errvalid++; |
521 | strcpy(errbuf, "readExports: cannot seek to loader section"); |
522 | safefree(ldbuf); |
523 | while(ldclose(ldp) == FAILURE) |
524 | ; |
525 | return -1; |
526 | } |
1553ab04 |
527 | /* This first case is a hack, since it assumes that the 3rd parameter to |
528 | FREAD is 1. See the redefinition of FREAD above to see how this works. */ |
a0d0e21e |
529 | if (FREAD(ldbuf, sh.s_size, 1, ldp) != 1) { |
530 | errvalid++; |
531 | strcpy(errbuf, "readExports: cannot read loader section"); |
532 | safefree(ldbuf); |
533 | while(ldclose(ldp) == FAILURE) |
534 | ; |
535 | return -1; |
536 | } |
19e194ad |
537 | lhp = (AIX_LDHDR *)ldbuf; |
538 | ls = (AIX_LDSYM *)(ldbuf+AIX_LDHDRSZ); |
a0d0e21e |
539 | /* |
540 | * Count the number of exports to include in our export table. |
541 | */ |
542 | for (i = lhp->l_nsyms; i; i--, ls++) { |
543 | if (!LDR_EXPORT(*ls)) |
544 | continue; |
545 | mp->nExports++; |
546 | } |
547 | Newz(1001, mp->exports, mp->nExports, Export); |
548 | if (mp->exports == NULL) { |
549 | errvalid++; |
550 | strcpy(errbuf, "readExports: "); |
fd206186 |
551 | strerrorcat(errbuf, errno); |
a0d0e21e |
552 | safefree(ldbuf); |
553 | while(ldclose(ldp) == FAILURE) |
554 | ; |
555 | return -1; |
556 | } |
557 | /* |
558 | * Fill in the export table. All entries are relative to |
559 | * the entry point we got from load. |
560 | */ |
561 | ep = mp->exports; |
19e194ad |
562 | ls = (AIX_LDSYM *)(ldbuf+AIX_LDHDRSZ); |
a0d0e21e |
563 | for (i = lhp->l_nsyms; i; i--, ls++) { |
564 | char *symname; |
565 | if (!LDR_EXPORT(*ls)) |
566 | continue; |
19e194ad |
567 | #ifndef USE_64_BIT_ALL |
a0d0e21e |
568 | if (ls->l_zeroes == 0) |
19e194ad |
569 | #endif |
a0d0e21e |
570 | symname = ls->l_offset+lhp->l_stoff+ldbuf; |
19e194ad |
571 | #ifndef USE_64_BIT_ALL |
a0d0e21e |
572 | else |
573 | symname = ls->l_name; |
19e194ad |
574 | #endif |
a0d0e21e |
575 | ep->name = savepv(symname); |
576 | ep->addr = (void *)((unsigned long)mp->entry + ls->l_value); |
577 | ep++; |
578 | } |
579 | safefree(ldbuf); |
580 | while(ldclose(ldp) == FAILURE) |
581 | ; |
582 | return 0; |
583 | } |
584 | |
7ca86468 |
585 | /* |
586 | * Find the main modules entry point. This is used as export pointer |
587 | * for loadbind() to be able to resolve references to the main part. |
588 | */ |
589 | static void * findMain(void) |
590 | { |
591 | struct ld_info *lp; |
592 | char *buf; |
593 | int size = 4*1024; |
594 | int i; |
595 | void *ret; |
596 | |
597 | if ((buf = safemalloc(size)) == NULL) { |
598 | errvalid++; |
599 | strcpy(errbuf, "findMain: "); |
600 | strerrorcat(errbuf, errno); |
601 | return NULL; |
602 | } |
603 | while ((i = loadquery(L_GETINFO, buf, size)) == -1 && errno == ENOMEM) { |
604 | safefree(buf); |
605 | size += 4*1024; |
606 | if ((buf = safemalloc(size)) == NULL) { |
607 | errvalid++; |
608 | strcpy(errbuf, "findMain: "); |
609 | strerrorcat(errbuf, errno); |
610 | return NULL; |
611 | } |
612 | } |
613 | if (i == -1) { |
614 | errvalid++; |
615 | strcpy(errbuf, "findMain: "); |
616 | strerrorcat(errbuf, errno); |
617 | safefree(buf); |
618 | return NULL; |
619 | } |
620 | /* |
621 | * The first entry is the main module. The entry point |
622 | * returned by load() does actually point to the data |
623 | * segment origin. |
624 | */ |
625 | lp = (struct ld_info *)buf; |
626 | ret = lp->ldinfo_dataorg; |
627 | safefree(buf); |
628 | return ret; |
629 | } |
630 | |
a0d0e21e |
631 | /* dl_dlopen.xs |
632 | * |
633 | * Platform: SunOS/Solaris, possibly others which use dlopen. |
0536e0eb |
634 | * Author: Paul Marquess (Paul.Marquess@btinternet.com) |
a0d0e21e |
635 | * Created: 10th July 1994 |
636 | * |
637 | * Modified: |
638 | * 15th July 1994 - Added code to explicitly save any error messages. |
639 | * 3rd August 1994 - Upgraded to v3 spec. |
640 | * 9th August 1994 - Changed to use IV |
641 | * 10th August 1994 - Tim Bunce: Added RTLD_LAZY, switchable debugging, |
642 | * basic FreeBSD support, removed ClearError |
643 | * |
644 | */ |
645 | |
646 | /* Porting notes: |
647 | |
648 | see dl_dlopen.xs |
649 | |
650 | */ |
651 | |
652 | #include "dlutils.c" /* SaveError() etc */ |
653 | |
654 | |
655 | static void |
cea2e8a9 |
656 | dl_private_init(pTHX) |
a0d0e21e |
657 | { |
cea2e8a9 |
658 | (void)dl_generic_private_init(aTHX); |
a0d0e21e |
659 | } |
660 | |
661 | MODULE = DynaLoader PACKAGE = DynaLoader |
662 | |
663 | BOOT: |
cea2e8a9 |
664 | (void)dl_private_init(aTHX); |
a0d0e21e |
665 | |
666 | |
667 | void * |
ff7f3c60 |
668 | dl_load_file(filename, flags=0) |
669 | char * filename |
670 | int flags |
a0d0e21e |
671 | CODE: |
bf49b057 |
672 | DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_load_file(%s,%x):\n", filename,flags)); |
ff7f3c60 |
673 | if (flags & 0x01) |
cea2e8a9 |
674 | Perl_warn(aTHX_ "Can't make loaded symbols global on this platform while loading %s",filename); |
a0d0e21e |
675 | RETVAL = dlopen(filename, 1) ; |
bf49b057 |
676 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, " libref=%x\n", RETVAL)); |
a0d0e21e |
677 | ST(0) = sv_newmortal() ; |
678 | if (RETVAL == NULL) |
cea2e8a9 |
679 | SaveError(aTHX_ "%s",dlerror()) ; |
a0d0e21e |
680 | else |
3175b8cd |
681 | sv_setiv( ST(0), PTR2IV(RETVAL) ); |
a0d0e21e |
682 | |
7ca86468 |
683 | int |
684 | dl_unload_file(libref) |
685 | void * libref |
686 | CODE: |
687 | DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_unload_file(%lx):\n", libref)); |
688 | RETVAL = (dlclose(libref) == 0 ? 1 : 0); |
689 | if (!RETVAL) |
690 | SaveError(aTHX_ "%s", dlerror()) ; |
691 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, " retval = %d\n", RETVAL)); |
692 | OUTPUT: |
693 | RETVAL |
a0d0e21e |
694 | |
695 | void * |
696 | dl_find_symbol(libhandle, symbolname) |
697 | void * libhandle |
698 | char * symbolname |
699 | CODE: |
bf49b057 |
700 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_find_symbol(handle=%x, symbol=%s)\n", |
a0d0e21e |
701 | libhandle, symbolname)); |
702 | RETVAL = dlsym(libhandle, symbolname); |
bf49b057 |
703 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, " symbolref = %x\n", RETVAL)); |
a0d0e21e |
704 | ST(0) = sv_newmortal() ; |
705 | if (RETVAL == NULL) |
cea2e8a9 |
706 | SaveError(aTHX_ "%s",dlerror()) ; |
a0d0e21e |
707 | else |
f66f545a |
708 | sv_setiv( ST(0), PTR2IV(RETVAL)); |
a0d0e21e |
709 | |
710 | |
711 | void |
712 | dl_undef_symbols() |
713 | PPCODE: |
714 | |
715 | |
716 | |
717 | # These functions should not need changing on any platform: |
718 | |
719 | void |
720 | dl_install_xsub(perl_name, symref, filename="$Package") |
721 | char * perl_name |
722 | void * symref |
723 | char * filename |
724 | CODE: |
bf49b057 |
725 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_install_xsub(name=%s, symref=%x)\n", |
a0d0e21e |
726 | perl_name, symref)); |
cea2e8a9 |
727 | ST(0) = sv_2mortal(newRV((SV*)newXS(perl_name, |
728 | (void(*)(pTHX_ CV *))symref, |
729 | filename))); |
a0d0e21e |
730 | |
731 | |
732 | char * |
733 | dl_error() |
734 | CODE: |
735 | RETVAL = LastError ; |
736 | OUTPUT: |
737 | RETVAL |
738 | |
739 | # end. |