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 | /* |
61d42ce4 |
17 | * On AIX 4.3 and above the emulation layer is not needed any more, and |
18 | * indeed if perl uses its emulation and perl is linked into apache |
19 | * which is supposed to use the native dlopen conflicts arise. |
20 | * Jens-Uwe Mager jum@helios.de |
21 | */ |
22 | #ifdef USE_NATIVE_DLOPEN |
23 | |
24 | #include "EXTERN.h" |
25 | #include "perl.h" |
26 | #include "XSUB.h" |
27 | #include <dlfcn.h> |
28 | |
c6a08c25 |
29 | #include "dlutils.c" /* SaveError() etc */ |
30 | |
61d42ce4 |
31 | #else |
32 | |
33 | /* |
a0d0e21e |
34 | * @(#)dlfcn.c 1.5 revision of 93/02/14 20:14:17 |
35 | * This is an unpublished work copyright (c) 1992 Helios Software GmbH |
36 | * 3000 Hannover 1, Germany |
37 | */ |
38 | #include "EXTERN.h" |
39 | #include "perl.h" |
40 | #include "XSUB.h" |
41 | |
19e194ad |
42 | /* When building as a 64-bit binary on AIX, define this to get the |
43 | * correct structure definitions. Also determines the field-name |
44 | * macros and gates some logic in readEntries(). -- Steven N. Hirsch |
45 | * <hirschs@btv.ibm.com> */ |
46 | #ifdef USE_64_BIT_ALL |
47 | # define __XCOFF64__ |
48 | # define __XCOFF32__ |
49 | #endif |
50 | |
a0d0e21e |
51 | #include <stdio.h> |
52 | #include <errno.h> |
53 | #include <string.h> |
54 | #include <stdlib.h> |
55 | #include <sys/types.h> |
56 | #include <sys/ldr.h> |
57 | #include <a.out.h> |
7ca86468 |
58 | #undef FREAD |
59 | #undef FWRITE |
a0d0e21e |
60 | #include <ldfcn.h> |
61 | |
19e194ad |
62 | #ifdef USE_64_BIT_ALL |
63 | # define AIX_SCNHDR SCNHDR_64 |
64 | # define AIX_LDHDR LDHDR_64 |
65 | # define AIX_LDSYM LDSYM_64 |
66 | # define AIX_LDHDRSZ LDHDRSZ_64 |
67 | #else |
68 | # define AIX_SCNHDR SCNHDR |
69 | # define AIX_LDHDR LDHDR |
70 | # define AIX_LDSYM LDSYM |
71 | # define AIX_LDHDRSZ LDHDRSZ |
72 | #endif |
73 | |
4e774c84 |
74 | /* When using Perl extensions written in C++ the longer versions |
75 | * of load() and unload() from libC and libC_r need to be used, |
76 | * otherwise statics in the extensions won't get initialized right. |
77 | * -- Stephanie Beals <bealzy@us.ibm.com> */ |
bab3591f |
78 | |
79 | /* Older AIX C compilers cannot deal with C++ double-slash comments in |
80 | the ibmcxx and/or xlC includes. Since we only need a single file, |
81 | be more fine-grained about what's included <hirschs@btv.ibm.com> */ |
3a7209f1 |
82 | |
c88be79f |
83 | #ifdef USE_libC /* The define comes, when it comes, from hints/aix.pl. */ |
84 | # define LOAD loadAndInit |
4e774c84 |
85 | # define UNLOAD terminateAndUnload |
3a7209f1 |
86 | # if defined(USE_vacpp_load_h) |
87 | # include "/usr/vacpp/include/load.h" |
bab3591f |
88 | # elif defined(USE_ibmcxx_load_h) |
89 | # include "/usr/ibmcxx/include/load.h" |
3a7209f1 |
90 | # elif defined(USE_xlC_load_h) |
91 | # include "/usr/lpp/xlC/include/load.h" |
a660608e |
92 | # elif defined(USE_load_h) |
3a7209f1 |
93 | # include "/usr/include/load.h" |
c88be79f |
94 | # endif |
4e774c84 |
95 | #else |
96 | # define LOAD load |
97 | # define UNLOAD unload |
98 | #endif |
99 | |
ee580363 |
100 | /* |
101 | * AIX 4.3 does remove some useful definitions from ldfcn.h. Define |
102 | * these here to compensate for that lossage. |
103 | */ |
104 | #ifndef BEGINNING |
105 | # define BEGINNING SEEK_SET |
106 | #endif |
107 | #ifndef FSEEK |
108 | # define FSEEK(ldptr,o,p) fseek(IOPTR(ldptr),(p==BEGINNING)?(OFFSET(ldptr) +o):o,p) |
109 | #endif |
110 | #ifndef FREAD |
111 | # define FREAD(p,s,n,ldptr) fread(p,s,n,IOPTR(ldptr)) |
112 | #endif |
113 | |
61d42ce4 |
114 | #ifndef RTLD_LAZY |
115 | # define RTLD_LAZY 0 |
116 | #endif |
117 | #ifndef RTLD_GLOBAL |
118 | # define RTLD_GLOBAL 0 |
119 | #endif |
120 | |
a0d0e21e |
121 | /* |
122 | * We simulate dlopen() et al. through a call to load. Because AIX has |
123 | * no call to find an exported symbol we read the loader section of the |
124 | * loaded module and build a list of exported symbols and their virtual |
125 | * address. |
126 | */ |
127 | |
128 | typedef struct { |
129 | char *name; /* the symbols's name */ |
130 | void *addr; /* its relocated virtual address */ |
131 | } Export, *ExportPtr; |
132 | |
133 | /* |
134 | * The void * handle returned from dlopen is actually a ModulePtr. |
135 | */ |
136 | typedef struct Module { |
137 | struct Module *next; |
138 | char *name; /* module name for refcounting */ |
139 | int refCnt; /* the number of references */ |
140 | void *entry; /* entry point from load */ |
141 | int nExports; /* the number of exports found */ |
142 | ExportPtr exports; /* the array of exports */ |
143 | } Module, *ModulePtr; |
144 | |
cdc73a10 |
145 | typedef struct { |
146 | /* |
147 | * We keep a list of all loaded modules to be able to reference count |
148 | * duplicate dlopen's. |
149 | */ |
150 | ModulePtr x_modList; |
151 | |
152 | /* |
153 | * The last error from one of the dl* routines is kept in static |
154 | * variables here. Each error is returned only once to the caller. |
155 | */ |
156 | char x_errbuf[BUFSIZ]; |
157 | int x_errvalid; |
158 | void * x_mainModule; |
159 | } my_cxtx_t; /* this *must* be named my_cxtx_t */ |
160 | |
161 | #define DL_CXT_EXTRA /* ask for dl_cxtx to be defined in dlutils.c */ |
162 | #include "dlutils.c" /* SaveError() etc */ |
a0d0e21e |
163 | |
cdc73a10 |
164 | #define dl_modList (dl_cxtx.x_modList) |
165 | #define dl_errbuf (dl_cxtx.x_errbuf) |
166 | #define dl_errvalid (dl_cxtx.x_errvalid) |
167 | #define dl_mainModule (dl_cxtx.x_mainModule) |
a0d0e21e |
168 | |
169 | static void caterr(char *); |
170 | static int readExports(ModulePtr); |
7ca86468 |
171 | static void *findMain(void); |
a0d0e21e |
172 | |
cdc73a10 |
173 | /* these statics are ok because they're constants */ |
ce637636 |
174 | static char *strerror_failed = "(strerror failed)"; |
175 | static char *strerror_r_failed = "(strerror_r failed)"; |
176 | |
fd206186 |
177 | char *strerrorcat(char *str, int err) { |
ce637636 |
178 | int strsiz = strlen(str); |
179 | int msgsiz; |
180 | char *msg; |
181 | |
4d1ff10f |
182 | #ifdef USE_5005THREADS |
ce637636 |
183 | char *buf = malloc(BUFSIZ); |
184 | |
185 | if (buf == 0) |
186 | return 0; |
549a6b10 |
187 | if (strerror_r(err, buf, BUFSIZ) == 0) |
ce637636 |
188 | msg = buf; |
189 | else |
190 | msg = strerror_r_failed; |
191 | msgsiz = strlen(msg); |
192 | if (strsiz + msgsiz < BUFSIZ) |
193 | strcat(str, msg); |
194 | free(buf); |
195 | #else |
48c64e3e |
196 | dTHX; |
48c64e3e |
197 | |
ce637636 |
198 | if ((msg = strerror(err)) == 0) |
199 | msg = strerror_failed; |
200 | msgsiz = strlen(msg); /* Note msg = buf and free() above. */ |
201 | if (strsiz + msgsiz < BUFSIZ) /* Do not move this after #endif. */ |
202 | strcat(str, msg); |
203 | #endif |
204 | |
fd206186 |
205 | return str; |
206 | } |
ce637636 |
207 | |
fd206186 |
208 | char *strerrorcpy(char *str, int err) { |
ce637636 |
209 | int msgsiz; |
210 | char *msg; |
211 | |
4d1ff10f |
212 | #ifdef USE_5005THREADS |
ce637636 |
213 | char *buf = malloc(BUFSIZ); |
214 | |
215 | if (buf == 0) |
216 | return 0; |
549a6b10 |
217 | if (strerror_r(err, buf, BUFSIZ) == 0) |
ce637636 |
218 | msg = buf; |
219 | else |
220 | msg = strerror_r_failed; |
221 | msgsiz = strlen(msg); |
222 | if (msgsiz < BUFSIZ) |
223 | strcpy(str, msg); |
224 | free(buf); |
225 | #else |
48c64e3e |
226 | dTHX; |
48c64e3e |
227 | |
ce637636 |
228 | if ((msg = strerror(err)) == 0) |
229 | msg = strerror_failed; |
230 | msgsiz = strlen(msg); /* Note msg = buf and free() above. */ |
231 | if (msgsiz < BUFSIZ) /* Do not move this after #endif. */ |
232 | strcpy(str, msg); |
233 | #endif |
234 | |
fd206186 |
235 | return str; |
236 | } |
a0d0e21e |
237 | |
238 | /* ARGSUSED */ |
239 | void *dlopen(char *path, int mode) |
240 | { |
5b877257 |
241 | dTHX; |
cdc73a10 |
242 | dMY_CXT; |
a0d0e21e |
243 | register ModulePtr mp; |
a0d0e21e |
244 | |
245 | /* |
246 | * Upon the first call register a terminate handler that will |
f6b3007c |
247 | * close all libraries. |
a0d0e21e |
248 | */ |
cdc73a10 |
249 | if (dl_mainModule == NULL) { |
250 | if ((dl_mainModule = findMain()) == NULL) |
7ca86468 |
251 | return NULL; |
a0d0e21e |
252 | } |
253 | /* |
254 | * Scan the list of modules if have the module already loaded. |
255 | */ |
cdc73a10 |
256 | for (mp = dl_modList; mp; mp = mp->next) |
a0d0e21e |
257 | if (strcmp(mp->name, path) == 0) { |
258 | mp->refCnt++; |
259 | return mp; |
260 | } |
261 | Newz(1000,mp,1,Module); |
262 | if (mp == NULL) { |
cdc73a10 |
263 | dl_errvalid++; |
264 | strcpy(dl_errbuf, "Newz: "); |
265 | strerrorcat(dl_errbuf, errno); |
a0d0e21e |
266 | return NULL; |
267 | } |
268 | |
269 | if ((mp->name = savepv(path)) == NULL) { |
cdc73a10 |
270 | dl_errvalid++; |
271 | strcpy(dl_errbuf, "savepv: "); |
272 | strerrorcat(dl_errbuf, errno); |
a0d0e21e |
273 | safefree(mp); |
274 | return NULL; |
275 | } |
549a6b10 |
276 | |
a0d0e21e |
277 | /* |
278 | * load should be declared load(const char *...). Thus we |
279 | * cast the path to a normal char *. Ugly. |
280 | */ |
4e774c84 |
281 | if ((mp->entry = (void *)LOAD((char *)path, |
549a6b10 |
282 | #ifdef L_LIBPATH_EXEC |
283 | L_LIBPATH_EXEC | |
284 | #endif |
285 | L_NOAUTODEFER, |
286 | NULL)) == NULL) { |
287 | int saverrno = errno; |
288 | |
a0d0e21e |
289 | safefree(mp->name); |
290 | safefree(mp); |
cdc73a10 |
291 | dl_errvalid++; |
292 | strcpy(dl_errbuf, "dlopen: "); |
293 | strcat(dl_errbuf, path); |
294 | strcat(dl_errbuf, ": "); |
a0d0e21e |
295 | /* |
296 | * If AIX says the file is not executable, the error |
297 | * can be further described by querying the loader about |
298 | * the last error. |
299 | */ |
549a6b10 |
300 | if (saverrno == ENOEXEC) { |
301 | char *moreinfo[BUFSIZ/sizeof(char *)]; |
302 | if (loadquery(L_GETMESSAGES, moreinfo, sizeof(moreinfo)) == -1) |
cdc73a10 |
303 | strerrorcpy(dl_errbuf, saverrno); |
a0d0e21e |
304 | else { |
305 | char **p; |
549a6b10 |
306 | for (p = moreinfo; *p; p++) |
a0d0e21e |
307 | caterr(*p); |
308 | } |
309 | } else |
cdc73a10 |
310 | strerrorcat(dl_errbuf, saverrno); |
a0d0e21e |
311 | return NULL; |
312 | } |
313 | mp->refCnt = 1; |
cdc73a10 |
314 | mp->next = dl_modList; |
315 | dl_modList = mp; |
f6b3007c |
316 | /* |
317 | * Assume anonymous exports come from the module this dlopen |
318 | * is linked into, that holds true as long as dlopen and all |
7ca86468 |
319 | * of the perl core are in the same shared object. Also bind |
320 | * against the main part, in the case a perl is not the main |
321 | * part, e.g mod_perl as DSO in Apache so perl modules can |
322 | * also reference Apache symbols. |
f6b3007c |
323 | */ |
7ca86468 |
324 | if (loadbind(0, (void *)dlopen, mp->entry) == -1 || |
cdc73a10 |
325 | loadbind(0, dl_mainModule, mp->entry)) { |
549a6b10 |
326 | int saverrno = errno; |
327 | |
a0d0e21e |
328 | dlclose(mp); |
cdc73a10 |
329 | dl_errvalid++; |
330 | strcpy(dl_errbuf, "loadbind: "); |
331 | strerrorcat(dl_errbuf, saverrno); |
a0d0e21e |
332 | return NULL; |
333 | } |
334 | if (readExports(mp) == -1) { |
335 | dlclose(mp); |
336 | return NULL; |
337 | } |
338 | return mp; |
339 | } |
340 | |
341 | /* |
342 | * Attempt to decipher an AIX loader error message and append it |
343 | * to our static error message buffer. |
344 | */ |
345 | static void caterr(char *s) |
346 | { |
cdc73a10 |
347 | dTHX; |
348 | dMY_CXT; |
a0d0e21e |
349 | register char *p = s; |
350 | |
351 | while (*p >= '0' && *p <= '9') |
352 | p++; |
353 | switch(atoi(s)) { |
354 | case L_ERROR_TOOMANY: |
cdc73a10 |
355 | strcat(dl_errbuf, "too many errors"); |
a0d0e21e |
356 | break; |
357 | case L_ERROR_NOLIB: |
cdc73a10 |
358 | strcat(dl_errbuf, "can't load library"); |
359 | strcat(dl_errbuf, p); |
a0d0e21e |
360 | break; |
361 | case L_ERROR_UNDEF: |
cdc73a10 |
362 | strcat(dl_errbuf, "can't find symbol"); |
363 | strcat(dl_errbuf, p); |
a0d0e21e |
364 | break; |
365 | case L_ERROR_RLDBAD: |
cdc73a10 |
366 | strcat(dl_errbuf, "bad RLD"); |
367 | strcat(dl_errbuf, p); |
a0d0e21e |
368 | break; |
369 | case L_ERROR_FORMAT: |
cdc73a10 |
370 | strcat(dl_errbuf, "bad exec format in"); |
371 | strcat(dl_errbuf, p); |
a0d0e21e |
372 | break; |
373 | case L_ERROR_ERRNO: |
cdc73a10 |
374 | strerrorcat(dl_errbuf, atoi(++p)); |
a0d0e21e |
375 | break; |
376 | default: |
cdc73a10 |
377 | strcat(dl_errbuf, s); |
a0d0e21e |
378 | break; |
379 | } |
380 | } |
381 | |
382 | void *dlsym(void *handle, const char *symbol) |
383 | { |
cdc73a10 |
384 | dTHX; |
385 | dMY_CXT; |
a0d0e21e |
386 | register ModulePtr mp = (ModulePtr)handle; |
387 | register ExportPtr ep; |
388 | register int i; |
389 | |
390 | /* |
391 | * Could speed up search, but I assume that one assigns |
392 | * the result to function pointers anyways. |
393 | */ |
394 | for (ep = mp->exports, i = mp->nExports; i; i--, ep++) |
395 | if (strcmp(ep->name, symbol) == 0) |
396 | return ep->addr; |
cdc73a10 |
397 | dl_errvalid++; |
398 | strcpy(dl_errbuf, "dlsym: undefined symbol "); |
399 | strcat(dl_errbuf, symbol); |
a0d0e21e |
400 | return NULL; |
401 | } |
402 | |
403 | char *dlerror(void) |
404 | { |
cdc73a10 |
405 | dTHX; |
406 | dMY_CXT; |
407 | if (dl_errvalid) { |
408 | dl_errvalid = 0; |
409 | return dl_errbuf; |
a0d0e21e |
410 | } |
411 | return NULL; |
412 | } |
413 | |
414 | int dlclose(void *handle) |
415 | { |
cdc73a10 |
416 | dTHX; |
417 | dMY_CXT; |
a0d0e21e |
418 | register ModulePtr mp = (ModulePtr)handle; |
419 | int result; |
420 | register ModulePtr mp1; |
421 | |
422 | if (--mp->refCnt > 0) |
423 | return 0; |
4e774c84 |
424 | result = UNLOAD(mp->entry); |
a0d0e21e |
425 | if (result == -1) { |
cdc73a10 |
426 | dl_errvalid++; |
427 | strerrorcpy(dl_errbuf, errno); |
a0d0e21e |
428 | } |
429 | if (mp->exports) { |
430 | register ExportPtr ep; |
431 | register int i; |
432 | for (ep = mp->exports, i = mp->nExports; i; i--, ep++) |
433 | if (ep->name) |
434 | safefree(ep->name); |
435 | safefree(mp->exports); |
436 | } |
cdc73a10 |
437 | if (mp == dl_modList) |
438 | dl_modList = mp->next; |
a0d0e21e |
439 | else { |
cdc73a10 |
440 | for (mp1 = dl_modList; mp1; mp1 = mp1->next) |
a0d0e21e |
441 | if (mp1->next == mp) { |
442 | mp1->next = mp->next; |
443 | break; |
444 | } |
445 | } |
446 | safefree(mp->name); |
447 | safefree(mp); |
448 | return result; |
449 | } |
450 | |
a0d0e21e |
451 | /* Added by Wayne Scott |
452 | * This is needed because the ldopen system call calls |
453 | * calloc to allocated a block of date. The ldclose call calls free. |
454 | * Without this we get this system calloc and perl's free, resulting |
455 | * in a "Bad free" message. This way we always use perl's malloc. |
456 | */ |
457 | void *calloc(size_t ne, size_t sz) |
458 | { |
459 | void *out; |
460 | |
461 | out = (void *) safemalloc(ne*sz); |
462 | memzero(out, ne*sz); |
463 | return(out); |
464 | } |
465 | |
466 | /* |
467 | * Build the export table from the XCOFF .loader section. |
468 | */ |
469 | static int readExports(ModulePtr mp) |
470 | { |
5b877257 |
471 | dTHX; |
cdc73a10 |
472 | dMY_CXT; |
a0d0e21e |
473 | LDFILE *ldp = NULL; |
19e194ad |
474 | AIX_SCNHDR sh; |
475 | AIX_LDHDR *lhp; |
a0d0e21e |
476 | char *ldbuf; |
19e194ad |
477 | AIX_LDSYM *ls; |
a0d0e21e |
478 | int i; |
479 | ExportPtr ep; |
480 | |
481 | if ((ldp = ldopen(mp->name, ldp)) == NULL) { |
482 | struct ld_info *lp; |
483 | char *buf; |
484 | int size = 4*1024; |
485 | if (errno != ENOENT) { |
cdc73a10 |
486 | dl_errvalid++; |
487 | strcpy(dl_errbuf, "readExports: "); |
488 | strerrorcat(dl_errbuf, errno); |
a0d0e21e |
489 | return -1; |
490 | } |
491 | /* |
492 | * The module might be loaded due to the LIBPATH |
493 | * environment variable. Search for the loaded |
494 | * module using L_GETINFO. |
495 | */ |
496 | if ((buf = safemalloc(size)) == NULL) { |
cdc73a10 |
497 | dl_errvalid++; |
498 | strcpy(dl_errbuf, "readExports: "); |
499 | strerrorcat(dl_errbuf, errno); |
a0d0e21e |
500 | return -1; |
501 | } |
502 | while ((i = loadquery(L_GETINFO, buf, size)) == -1 && errno == ENOMEM) { |
503 | safefree(buf); |
504 | size += 4*1024; |
505 | if ((buf = safemalloc(size)) == NULL) { |
cdc73a10 |
506 | dl_errvalid++; |
507 | strcpy(dl_errbuf, "readExports: "); |
508 | strerrorcat(dl_errbuf, errno); |
a0d0e21e |
509 | return -1; |
510 | } |
511 | } |
512 | if (i == -1) { |
cdc73a10 |
513 | dl_errvalid++; |
514 | strcpy(dl_errbuf, "readExports: "); |
515 | strerrorcat(dl_errbuf, errno); |
a0d0e21e |
516 | safefree(buf); |
517 | return -1; |
518 | } |
519 | /* |
520 | * Traverse the list of loaded modules. The entry point |
4e774c84 |
521 | * returned by LOAD() does actually point to the data |
a0d0e21e |
522 | * segment origin. |
523 | */ |
524 | lp = (struct ld_info *)buf; |
525 | while (lp) { |
526 | if (lp->ldinfo_dataorg == mp->entry) { |
527 | ldp = ldopen(lp->ldinfo_filename, ldp); |
528 | break; |
529 | } |
530 | if (lp->ldinfo_next == 0) |
531 | lp = NULL; |
532 | else |
533 | lp = (struct ld_info *)((char *)lp + lp->ldinfo_next); |
534 | } |
535 | safefree(buf); |
536 | if (!ldp) { |
cdc73a10 |
537 | dl_errvalid++; |
538 | strcpy(dl_errbuf, "readExports: "); |
539 | strerrorcat(dl_errbuf, errno); |
a0d0e21e |
540 | return -1; |
541 | } |
542 | } |
19e194ad |
543 | #ifdef USE_64_BIT_ALL |
544 | if (TYPE(ldp) != U803XTOCMAGIC) { |
545 | #else |
a0d0e21e |
546 | if (TYPE(ldp) != U802TOCMAGIC) { |
19e194ad |
547 | #endif |
cdc73a10 |
548 | dl_errvalid++; |
549 | strcpy(dl_errbuf, "readExports: bad magic"); |
a0d0e21e |
550 | while(ldclose(ldp) == FAILURE) |
551 | ; |
552 | return -1; |
553 | } |
554 | if (ldnshread(ldp, _LOADER, &sh) != SUCCESS) { |
cdc73a10 |
555 | dl_errvalid++; |
556 | strcpy(dl_errbuf, "readExports: cannot read loader section header"); |
a0d0e21e |
557 | while(ldclose(ldp) == FAILURE) |
558 | ; |
559 | return -1; |
560 | } |
561 | /* |
562 | * We read the complete loader section in one chunk, this makes |
563 | * finding long symbol names residing in the string table easier. |
564 | */ |
565 | if ((ldbuf = (char *)safemalloc(sh.s_size)) == NULL) { |
cdc73a10 |
566 | dl_errvalid++; |
567 | strcpy(dl_errbuf, "readExports: "); |
568 | strerrorcat(dl_errbuf, errno); |
a0d0e21e |
569 | while(ldclose(ldp) == FAILURE) |
570 | ; |
571 | return -1; |
572 | } |
573 | if (FSEEK(ldp, sh.s_scnptr, BEGINNING) != OKFSEEK) { |
cdc73a10 |
574 | dl_errvalid++; |
575 | strcpy(dl_errbuf, "readExports: cannot seek to loader section"); |
a0d0e21e |
576 | safefree(ldbuf); |
577 | while(ldclose(ldp) == FAILURE) |
578 | ; |
579 | return -1; |
580 | } |
1553ab04 |
581 | /* This first case is a hack, since it assumes that the 3rd parameter to |
582 | FREAD is 1. See the redefinition of FREAD above to see how this works. */ |
a0d0e21e |
583 | if (FREAD(ldbuf, sh.s_size, 1, ldp) != 1) { |
cdc73a10 |
584 | dl_errvalid++; |
585 | strcpy(dl_errbuf, "readExports: cannot read loader section"); |
a0d0e21e |
586 | safefree(ldbuf); |
587 | while(ldclose(ldp) == FAILURE) |
588 | ; |
589 | return -1; |
590 | } |
19e194ad |
591 | lhp = (AIX_LDHDR *)ldbuf; |
592 | ls = (AIX_LDSYM *)(ldbuf+AIX_LDHDRSZ); |
a0d0e21e |
593 | /* |
594 | * Count the number of exports to include in our export table. |
595 | */ |
596 | for (i = lhp->l_nsyms; i; i--, ls++) { |
597 | if (!LDR_EXPORT(*ls)) |
598 | continue; |
599 | mp->nExports++; |
600 | } |
601 | Newz(1001, mp->exports, mp->nExports, Export); |
602 | if (mp->exports == NULL) { |
cdc73a10 |
603 | dl_errvalid++; |
604 | strcpy(dl_errbuf, "readExports: "); |
605 | strerrorcat(dl_errbuf, errno); |
a0d0e21e |
606 | safefree(ldbuf); |
607 | while(ldclose(ldp) == FAILURE) |
608 | ; |
609 | return -1; |
610 | } |
611 | /* |
612 | * Fill in the export table. All entries are relative to |
613 | * the entry point we got from load. |
614 | */ |
615 | ep = mp->exports; |
19e194ad |
616 | ls = (AIX_LDSYM *)(ldbuf+AIX_LDHDRSZ); |
a0d0e21e |
617 | for (i = lhp->l_nsyms; i; i--, ls++) { |
618 | char *symname; |
619 | if (!LDR_EXPORT(*ls)) |
620 | continue; |
19e194ad |
621 | #ifndef USE_64_BIT_ALL |
a0d0e21e |
622 | if (ls->l_zeroes == 0) |
19e194ad |
623 | #endif |
a0d0e21e |
624 | symname = ls->l_offset+lhp->l_stoff+ldbuf; |
19e194ad |
625 | #ifndef USE_64_BIT_ALL |
a0d0e21e |
626 | else |
627 | symname = ls->l_name; |
19e194ad |
628 | #endif |
a0d0e21e |
629 | ep->name = savepv(symname); |
630 | ep->addr = (void *)((unsigned long)mp->entry + ls->l_value); |
631 | ep++; |
632 | } |
633 | safefree(ldbuf); |
634 | while(ldclose(ldp) == FAILURE) |
635 | ; |
636 | return 0; |
637 | } |
638 | |
7ca86468 |
639 | /* |
640 | * Find the main modules entry point. This is used as export pointer |
641 | * for loadbind() to be able to resolve references to the main part. |
642 | */ |
643 | static void * findMain(void) |
644 | { |
cdc73a10 |
645 | dTHX; |
646 | dMY_CXT; |
7ca86468 |
647 | struct ld_info *lp; |
648 | char *buf; |
649 | int size = 4*1024; |
650 | int i; |
651 | void *ret; |
652 | |
653 | if ((buf = safemalloc(size)) == NULL) { |
cdc73a10 |
654 | dl_errvalid++; |
655 | strcpy(dl_errbuf, "findMain: "); |
656 | strerrorcat(dl_errbuf, errno); |
7ca86468 |
657 | return NULL; |
658 | } |
659 | while ((i = loadquery(L_GETINFO, buf, size)) == -1 && errno == ENOMEM) { |
660 | safefree(buf); |
661 | size += 4*1024; |
662 | if ((buf = safemalloc(size)) == NULL) { |
cdc73a10 |
663 | dl_errvalid++; |
664 | strcpy(dl_errbuf, "findMain: "); |
665 | strerrorcat(dl_errbuf, errno); |
7ca86468 |
666 | return NULL; |
667 | } |
668 | } |
669 | if (i == -1) { |
cdc73a10 |
670 | dl_errvalid++; |
671 | strcpy(dl_errbuf, "findMain: "); |
672 | strerrorcat(dl_errbuf, errno); |
7ca86468 |
673 | safefree(buf); |
674 | return NULL; |
675 | } |
676 | /* |
677 | * The first entry is the main module. The entry point |
678 | * returned by load() does actually point to the data |
679 | * segment origin. |
680 | */ |
681 | lp = (struct ld_info *)buf; |
682 | ret = lp->ldinfo_dataorg; |
683 | safefree(buf); |
684 | return ret; |
685 | } |
61d42ce4 |
686 | #endif /* USE_NATIVE_DLOPEN */ |
7ca86468 |
687 | |
a0d0e21e |
688 | /* dl_dlopen.xs |
689 | * |
690 | * Platform: SunOS/Solaris, possibly others which use dlopen. |
0536e0eb |
691 | * Author: Paul Marquess (Paul.Marquess@btinternet.com) |
a0d0e21e |
692 | * Created: 10th July 1994 |
693 | * |
694 | * Modified: |
695 | * 15th July 1994 - Added code to explicitly save any error messages. |
696 | * 3rd August 1994 - Upgraded to v3 spec. |
697 | * 9th August 1994 - Changed to use IV |
698 | * 10th August 1994 - Tim Bunce: Added RTLD_LAZY, switchable debugging, |
699 | * basic FreeBSD support, removed ClearError |
700 | * |
701 | */ |
702 | |
703 | /* Porting notes: |
704 | |
705 | see dl_dlopen.xs |
706 | |
707 | */ |
708 | |
a0d0e21e |
709 | static void |
cea2e8a9 |
710 | dl_private_init(pTHX) |
a0d0e21e |
711 | { |
cea2e8a9 |
712 | (void)dl_generic_private_init(aTHX); |
a0d0e21e |
713 | } |
714 | |
715 | MODULE = DynaLoader PACKAGE = DynaLoader |
716 | |
717 | BOOT: |
cea2e8a9 |
718 | (void)dl_private_init(aTHX); |
a0d0e21e |
719 | |
720 | |
721 | void * |
ff7f3c60 |
722 | dl_load_file(filename, flags=0) |
723 | char * filename |
724 | int flags |
a0d0e21e |
725 | CODE: |
bf49b057 |
726 | DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_load_file(%s,%x):\n", filename,flags)); |
ff7f3c60 |
727 | if (flags & 0x01) |
cea2e8a9 |
728 | Perl_warn(aTHX_ "Can't make loaded symbols global on this platform while loading %s",filename); |
61d42ce4 |
729 | RETVAL = dlopen(filename, RTLD_GLOBAL|RTLD_LAZY) ; |
bf49b057 |
730 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, " libref=%x\n", RETVAL)); |
a0d0e21e |
731 | ST(0) = sv_newmortal() ; |
732 | if (RETVAL == NULL) |
cea2e8a9 |
733 | SaveError(aTHX_ "%s",dlerror()) ; |
a0d0e21e |
734 | else |
3175b8cd |
735 | sv_setiv( ST(0), PTR2IV(RETVAL) ); |
a0d0e21e |
736 | |
7ca86468 |
737 | int |
738 | dl_unload_file(libref) |
739 | void * libref |
740 | CODE: |
741 | DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_unload_file(%lx):\n", libref)); |
742 | RETVAL = (dlclose(libref) == 0 ? 1 : 0); |
743 | if (!RETVAL) |
744 | SaveError(aTHX_ "%s", dlerror()) ; |
745 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, " retval = %d\n", RETVAL)); |
746 | OUTPUT: |
747 | RETVAL |
a0d0e21e |
748 | |
749 | void * |
750 | dl_find_symbol(libhandle, symbolname) |
751 | void * libhandle |
752 | char * symbolname |
753 | CODE: |
bf49b057 |
754 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_find_symbol(handle=%x, symbol=%s)\n", |
a0d0e21e |
755 | libhandle, symbolname)); |
756 | RETVAL = dlsym(libhandle, symbolname); |
bf49b057 |
757 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, " symbolref = %x\n", RETVAL)); |
a0d0e21e |
758 | ST(0) = sv_newmortal() ; |
759 | if (RETVAL == NULL) |
cea2e8a9 |
760 | SaveError(aTHX_ "%s",dlerror()) ; |
a0d0e21e |
761 | else |
f66f545a |
762 | sv_setiv( ST(0), PTR2IV(RETVAL)); |
a0d0e21e |
763 | |
764 | |
765 | void |
766 | dl_undef_symbols() |
767 | PPCODE: |
768 | |
769 | |
770 | |
771 | # These functions should not need changing on any platform: |
772 | |
773 | void |
774 | dl_install_xsub(perl_name, symref, filename="$Package") |
775 | char * perl_name |
776 | void * symref |
777 | char * filename |
778 | CODE: |
bf49b057 |
779 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_install_xsub(name=%s, symref=%x)\n", |
a0d0e21e |
780 | perl_name, symref)); |
cea2e8a9 |
781 | ST(0) = sv_2mortal(newRV((SV*)newXS(perl_name, |
782 | (void(*)(pTHX_ CV *))symref, |
783 | filename))); |
a0d0e21e |
784 | |
785 | |
786 | char * |
787 | dl_error() |
788 | CODE: |
cdc73a10 |
789 | dMY_CXT; |
790 | RETVAL = dl_last_error ; |
a0d0e21e |
791 | OUTPUT: |
792 | RETVAL |
793 | |
794 | # end. |