Commit | Line | Data |
---|---|---|
a0d0e21e LW |
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 MB |
14 | #define PERLIO_NOT_STDIO 0 |
15 | ||
a0d0e21e | 16 | /* |
61d42ce4 JH |
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 | ||
29 | #else | |
30 | ||
31 | /* | |
a0d0e21e LW |
32 | * @(#)dlfcn.c 1.5 revision of 93/02/14 20:14:17 |
33 | * This is an unpublished work copyright (c) 1992 Helios Software GmbH | |
34 | * 3000 Hannover 1, Germany | |
35 | */ | |
36 | #include "EXTERN.h" | |
37 | #include "perl.h" | |
38 | #include "XSUB.h" | |
39 | ||
19e194ad JH |
40 | /* When building as a 64-bit binary on AIX, define this to get the |
41 | * correct structure definitions. Also determines the field-name | |
42 | * macros and gates some logic in readEntries(). -- Steven N. Hirsch | |
43 | * <hirschs@btv.ibm.com> */ | |
44 | #ifdef USE_64_BIT_ALL | |
45 | # define __XCOFF64__ | |
46 | # define __XCOFF32__ | |
47 | #endif | |
48 | ||
a0d0e21e LW |
49 | #include <stdio.h> |
50 | #include <errno.h> | |
51 | #include <string.h> | |
52 | #include <stdlib.h> | |
53 | #include <sys/types.h> | |
54 | #include <sys/ldr.h> | |
55 | #include <a.out.h> | |
7ca86468 GS |
56 | #undef FREAD |
57 | #undef FWRITE | |
a0d0e21e LW |
58 | #include <ldfcn.h> |
59 | ||
19e194ad JH |
60 | #ifdef USE_64_BIT_ALL |
61 | # define AIX_SCNHDR SCNHDR_64 | |
62 | # define AIX_LDHDR LDHDR_64 | |
63 | # define AIX_LDSYM LDSYM_64 | |
64 | # define AIX_LDHDRSZ LDHDRSZ_64 | |
65 | #else | |
66 | # define AIX_SCNHDR SCNHDR | |
67 | # define AIX_LDHDR LDHDR | |
68 | # define AIX_LDSYM LDSYM | |
69 | # define AIX_LDHDRSZ LDHDRSZ | |
70 | #endif | |
71 | ||
4e774c84 SB |
72 | /* When using Perl extensions written in C++ the longer versions |
73 | * of load() and unload() from libC and libC_r need to be used, | |
74 | * otherwise statics in the extensions won't get initialized right. | |
75 | * -- Stephanie Beals <bealzy@us.ibm.com> */ | |
bab3591f JH |
76 | |
77 | /* Older AIX C compilers cannot deal with C++ double-slash comments in | |
78 | the ibmcxx and/or xlC includes. Since we only need a single file, | |
79 | be more fine-grained about what's included <hirschs@btv.ibm.com> */ | |
3a7209f1 | 80 | |
c88be79f JH |
81 | #ifdef USE_libC /* The define comes, when it comes, from hints/aix.pl. */ |
82 | # define LOAD loadAndInit | |
4e774c84 | 83 | # define UNLOAD terminateAndUnload |
3a7209f1 JH |
84 | # if defined(USE_vacpp_load_h) |
85 | # include "/usr/vacpp/include/load.h" | |
bab3591f JH |
86 | # elif defined(USE_ibmcxx_load_h) |
87 | # include "/usr/ibmcxx/include/load.h" | |
3a7209f1 JH |
88 | # elif defined(USE_xlC_load_h) |
89 | # include "/usr/lpp/xlC/include/load.h" | |
a660608e | 90 | # elif defined(USE_load_h) |
3a7209f1 | 91 | # include "/usr/include/load.h" |
c88be79f | 92 | # endif |
4e774c84 SB |
93 | #else |
94 | # define LOAD load | |
95 | # define UNLOAD unload | |
96 | #endif | |
97 | ||
ee580363 GS |
98 | /* |
99 | * AIX 4.3 does remove some useful definitions from ldfcn.h. Define | |
100 | * these here to compensate for that lossage. | |
101 | */ | |
102 | #ifndef BEGINNING | |
103 | # define BEGINNING SEEK_SET | |
104 | #endif | |
105 | #ifndef FSEEK | |
106 | # define FSEEK(ldptr,o,p) fseek(IOPTR(ldptr),(p==BEGINNING)?(OFFSET(ldptr) +o):o,p) | |
107 | #endif | |
108 | #ifndef FREAD | |
109 | # define FREAD(p,s,n,ldptr) fread(p,s,n,IOPTR(ldptr)) | |
110 | #endif | |
111 | ||
61d42ce4 JH |
112 | #ifndef RTLD_LAZY |
113 | # define RTLD_LAZY 0 | |
114 | #endif | |
115 | #ifndef RTLD_GLOBAL | |
116 | # define RTLD_GLOBAL 0 | |
117 | #endif | |
118 | ||
a0d0e21e LW |
119 | /* |
120 | * We simulate dlopen() et al. through a call to load. Because AIX has | |
121 | * no call to find an exported symbol we read the loader section of the | |
122 | * loaded module and build a list of exported symbols and their virtual | |
123 | * address. | |
124 | */ | |
125 | ||
126 | typedef struct { | |
127 | char *name; /* the symbols's name */ | |
128 | void *addr; /* its relocated virtual address */ | |
129 | } Export, *ExportPtr; | |
130 | ||
131 | /* | |
132 | * The void * handle returned from dlopen is actually a ModulePtr. | |
133 | */ | |
134 | typedef struct Module { | |
135 | struct Module *next; | |
136 | char *name; /* module name for refcounting */ | |
137 | int refCnt; /* the number of references */ | |
138 | void *entry; /* entry point from load */ | |
139 | int nExports; /* the number of exports found */ | |
140 | ExportPtr exports; /* the array of exports */ | |
141 | } Module, *ModulePtr; | |
142 | ||
cdc73a10 JH |
143 | typedef struct { |
144 | /* | |
145 | * We keep a list of all loaded modules to be able to reference count | |
146 | * duplicate dlopen's. | |
147 | */ | |
148 | ModulePtr x_modList; | |
149 | ||
150 | /* | |
151 | * The last error from one of the dl* routines is kept in static | |
152 | * variables here. Each error is returned only once to the caller. | |
153 | */ | |
154 | char x_errbuf[BUFSIZ]; | |
155 | int x_errvalid; | |
156 | void * x_mainModule; | |
157 | } my_cxtx_t; /* this *must* be named my_cxtx_t */ | |
158 | ||
159 | #define DL_CXT_EXTRA /* ask for dl_cxtx to be defined in dlutils.c */ | |
160 | #include "dlutils.c" /* SaveError() etc */ | |
a0d0e21e | 161 | |
cdc73a10 JH |
162 | #define dl_modList (dl_cxtx.x_modList) |
163 | #define dl_errbuf (dl_cxtx.x_errbuf) | |
164 | #define dl_errvalid (dl_cxtx.x_errvalid) | |
165 | #define dl_mainModule (dl_cxtx.x_mainModule) | |
a0d0e21e LW |
166 | |
167 | static void caterr(char *); | |
168 | static int readExports(ModulePtr); | |
7ca86468 | 169 | static void *findMain(void); |
a0d0e21e | 170 | |
cdc73a10 | 171 | /* these statics are ok because they're constants */ |
ce637636 JH |
172 | static char *strerror_failed = "(strerror failed)"; |
173 | static char *strerror_r_failed = "(strerror_r failed)"; | |
174 | ||
fd206186 | 175 | char *strerrorcat(char *str, int err) { |
ce637636 JH |
176 | int strsiz = strlen(str); |
177 | int msgsiz; | |
178 | char *msg; | |
179 | ||
4d1ff10f | 180 | #ifdef USE_5005THREADS |
ce637636 JH |
181 | char *buf = malloc(BUFSIZ); |
182 | ||
183 | if (buf == 0) | |
184 | return 0; | |
549a6b10 | 185 | if (strerror_r(err, buf, BUFSIZ) == 0) |
ce637636 JH |
186 | msg = buf; |
187 | else | |
188 | msg = strerror_r_failed; | |
189 | msgsiz = strlen(msg); | |
190 | if (strsiz + msgsiz < BUFSIZ) | |
191 | strcat(str, msg); | |
192 | free(buf); | |
193 | #else | |
194 | if ((msg = strerror(err)) == 0) | |
195 | msg = strerror_failed; | |
196 | msgsiz = strlen(msg); /* Note msg = buf and free() above. */ | |
197 | if (strsiz + msgsiz < BUFSIZ) /* Do not move this after #endif. */ | |
198 | strcat(str, msg); | |
199 | #endif | |
200 | ||
fd206186 JH |
201 | return str; |
202 | } | |
ce637636 | 203 | |
fd206186 | 204 | char *strerrorcpy(char *str, int err) { |
ce637636 JH |
205 | int msgsiz; |
206 | char *msg; | |
207 | ||
4d1ff10f | 208 | #ifdef USE_5005THREADS |
ce637636 JH |
209 | char *buf = malloc(BUFSIZ); |
210 | ||
211 | if (buf == 0) | |
212 | return 0; | |
549a6b10 | 213 | if (strerror_r(err, buf, BUFSIZ) == 0) |
ce637636 JH |
214 | msg = buf; |
215 | else | |
216 | msg = strerror_r_failed; | |
217 | msgsiz = strlen(msg); | |
218 | if (msgsiz < BUFSIZ) | |
219 | strcpy(str, msg); | |
220 | free(buf); | |
221 | #else | |
222 | if ((msg = strerror(err)) == 0) | |
223 | msg = strerror_failed; | |
224 | msgsiz = strlen(msg); /* Note msg = buf and free() above. */ | |
225 | if (msgsiz < BUFSIZ) /* Do not move this after #endif. */ | |
226 | strcpy(str, msg); | |
227 | #endif | |
228 | ||
fd206186 JH |
229 | return str; |
230 | } | |
a0d0e21e LW |
231 | |
232 | /* ARGSUSED */ | |
233 | void *dlopen(char *path, int mode) | |
234 | { | |
5b877257 | 235 | dTHX; |
cdc73a10 | 236 | dMY_CXT; |
a0d0e21e | 237 | register ModulePtr mp; |
a0d0e21e LW |
238 | |
239 | /* | |
240 | * Upon the first call register a terminate handler that will | |
f6b3007c | 241 | * close all libraries. |
a0d0e21e | 242 | */ |
cdc73a10 JH |
243 | if (dl_mainModule == NULL) { |
244 | if ((dl_mainModule = findMain()) == NULL) | |
7ca86468 | 245 | return NULL; |
a0d0e21e LW |
246 | } |
247 | /* | |
248 | * Scan the list of modules if have the module already loaded. | |
249 | */ | |
cdc73a10 | 250 | for (mp = dl_modList; mp; mp = mp->next) |
a0d0e21e LW |
251 | if (strcmp(mp->name, path) == 0) { |
252 | mp->refCnt++; | |
253 | return mp; | |
254 | } | |
255 | Newz(1000,mp,1,Module); | |
256 | if (mp == NULL) { | |
cdc73a10 JH |
257 | dl_errvalid++; |
258 | strcpy(dl_errbuf, "Newz: "); | |
259 | strerrorcat(dl_errbuf, errno); | |
a0d0e21e LW |
260 | return NULL; |
261 | } | |
262 | ||
263 | if ((mp->name = savepv(path)) == NULL) { | |
cdc73a10 JH |
264 | dl_errvalid++; |
265 | strcpy(dl_errbuf, "savepv: "); | |
266 | strerrorcat(dl_errbuf, errno); | |
a0d0e21e LW |
267 | safefree(mp); |
268 | return NULL; | |
269 | } | |
549a6b10 | 270 | |
a0d0e21e LW |
271 | /* |
272 | * load should be declared load(const char *...). Thus we | |
273 | * cast the path to a normal char *. Ugly. | |
274 | */ | |
4e774c84 | 275 | if ((mp->entry = (void *)LOAD((char *)path, |
549a6b10 JH |
276 | #ifdef L_LIBPATH_EXEC |
277 | L_LIBPATH_EXEC | | |
278 | #endif | |
279 | L_NOAUTODEFER, | |
280 | NULL)) == NULL) { | |
281 | int saverrno = errno; | |
282 | ||
a0d0e21e LW |
283 | safefree(mp->name); |
284 | safefree(mp); | |
cdc73a10 JH |
285 | dl_errvalid++; |
286 | strcpy(dl_errbuf, "dlopen: "); | |
287 | strcat(dl_errbuf, path); | |
288 | strcat(dl_errbuf, ": "); | |
a0d0e21e LW |
289 | /* |
290 | * If AIX says the file is not executable, the error | |
291 | * can be further described by querying the loader about | |
292 | * the last error. | |
293 | */ | |
549a6b10 JH |
294 | if (saverrno == ENOEXEC) { |
295 | char *moreinfo[BUFSIZ/sizeof(char *)]; | |
296 | if (loadquery(L_GETMESSAGES, moreinfo, sizeof(moreinfo)) == -1) | |
cdc73a10 | 297 | strerrorcpy(dl_errbuf, saverrno); |
a0d0e21e LW |
298 | else { |
299 | char **p; | |
549a6b10 | 300 | for (p = moreinfo; *p; p++) |
a0d0e21e LW |
301 | caterr(*p); |
302 | } | |
303 | } else | |
cdc73a10 | 304 | strerrorcat(dl_errbuf, saverrno); |
a0d0e21e LW |
305 | return NULL; |
306 | } | |
307 | mp->refCnt = 1; | |
cdc73a10 JH |
308 | mp->next = dl_modList; |
309 | dl_modList = mp; | |
f6b3007c JH |
310 | /* |
311 | * Assume anonymous exports come from the module this dlopen | |
312 | * is linked into, that holds true as long as dlopen and all | |
7ca86468 GS |
313 | * of the perl core are in the same shared object. Also bind |
314 | * against the main part, in the case a perl is not the main | |
315 | * part, e.g mod_perl as DSO in Apache so perl modules can | |
316 | * also reference Apache symbols. | |
f6b3007c | 317 | */ |
7ca86468 | 318 | if (loadbind(0, (void *)dlopen, mp->entry) == -1 || |
cdc73a10 | 319 | loadbind(0, dl_mainModule, mp->entry)) { |
549a6b10 JH |
320 | int saverrno = errno; |
321 | ||
a0d0e21e | 322 | dlclose(mp); |
cdc73a10 JH |
323 | dl_errvalid++; |
324 | strcpy(dl_errbuf, "loadbind: "); | |
325 | strerrorcat(dl_errbuf, saverrno); | |
a0d0e21e LW |
326 | return NULL; |
327 | } | |
328 | if (readExports(mp) == -1) { | |
329 | dlclose(mp); | |
330 | return NULL; | |
331 | } | |
332 | return mp; | |
333 | } | |
334 | ||
335 | /* | |
336 | * Attempt to decipher an AIX loader error message and append it | |
337 | * to our static error message buffer. | |
338 | */ | |
339 | static void caterr(char *s) | |
340 | { | |
cdc73a10 JH |
341 | dTHX; |
342 | dMY_CXT; | |
a0d0e21e LW |
343 | register char *p = s; |
344 | ||
345 | while (*p >= '0' && *p <= '9') | |
346 | p++; | |
347 | switch(atoi(s)) { | |
348 | case L_ERROR_TOOMANY: | |
cdc73a10 | 349 | strcat(dl_errbuf, "too many errors"); |
a0d0e21e LW |
350 | break; |
351 | case L_ERROR_NOLIB: | |
cdc73a10 JH |
352 | strcat(dl_errbuf, "can't load library"); |
353 | strcat(dl_errbuf, p); | |
a0d0e21e LW |
354 | break; |
355 | case L_ERROR_UNDEF: | |
cdc73a10 JH |
356 | strcat(dl_errbuf, "can't find symbol"); |
357 | strcat(dl_errbuf, p); | |
a0d0e21e LW |
358 | break; |
359 | case L_ERROR_RLDBAD: | |
cdc73a10 JH |
360 | strcat(dl_errbuf, "bad RLD"); |
361 | strcat(dl_errbuf, p); | |
a0d0e21e LW |
362 | break; |
363 | case L_ERROR_FORMAT: | |
cdc73a10 JH |
364 | strcat(dl_errbuf, "bad exec format in"); |
365 | strcat(dl_errbuf, p); | |
a0d0e21e LW |
366 | break; |
367 | case L_ERROR_ERRNO: | |
cdc73a10 | 368 | strerrorcat(dl_errbuf, atoi(++p)); |
a0d0e21e LW |
369 | break; |
370 | default: | |
cdc73a10 | 371 | strcat(dl_errbuf, s); |
a0d0e21e LW |
372 | break; |
373 | } | |
374 | } | |
375 | ||
376 | void *dlsym(void *handle, const char *symbol) | |
377 | { | |
cdc73a10 JH |
378 | dTHX; |
379 | dMY_CXT; | |
a0d0e21e LW |
380 | register ModulePtr mp = (ModulePtr)handle; |
381 | register ExportPtr ep; | |
382 | register int i; | |
383 | ||
384 | /* | |
385 | * Could speed up search, but I assume that one assigns | |
386 | * the result to function pointers anyways. | |
387 | */ | |
388 | for (ep = mp->exports, i = mp->nExports; i; i--, ep++) | |
389 | if (strcmp(ep->name, symbol) == 0) | |
390 | return ep->addr; | |
cdc73a10 JH |
391 | dl_errvalid++; |
392 | strcpy(dl_errbuf, "dlsym: undefined symbol "); | |
393 | strcat(dl_errbuf, symbol); | |
a0d0e21e LW |
394 | return NULL; |
395 | } | |
396 | ||
397 | char *dlerror(void) | |
398 | { | |
cdc73a10 JH |
399 | dTHX; |
400 | dMY_CXT; | |
401 | if (dl_errvalid) { | |
402 | dl_errvalid = 0; | |
403 | return dl_errbuf; | |
a0d0e21e LW |
404 | } |
405 | return NULL; | |
406 | } | |
407 | ||
408 | int dlclose(void *handle) | |
409 | { | |
cdc73a10 JH |
410 | dTHX; |
411 | dMY_CXT; | |
a0d0e21e LW |
412 | register ModulePtr mp = (ModulePtr)handle; |
413 | int result; | |
414 | register ModulePtr mp1; | |
415 | ||
416 | if (--mp->refCnt > 0) | |
417 | return 0; | |
4e774c84 | 418 | result = UNLOAD(mp->entry); |
a0d0e21e | 419 | if (result == -1) { |
cdc73a10 JH |
420 | dl_errvalid++; |
421 | strerrorcpy(dl_errbuf, errno); | |
a0d0e21e LW |
422 | } |
423 | if (mp->exports) { | |
424 | register ExportPtr ep; | |
425 | register int i; | |
426 | for (ep = mp->exports, i = mp->nExports; i; i--, ep++) | |
427 | if (ep->name) | |
428 | safefree(ep->name); | |
429 | safefree(mp->exports); | |
430 | } | |
cdc73a10 JH |
431 | if (mp == dl_modList) |
432 | dl_modList = mp->next; | |
a0d0e21e | 433 | else { |
cdc73a10 | 434 | for (mp1 = dl_modList; mp1; mp1 = mp1->next) |
a0d0e21e LW |
435 | if (mp1->next == mp) { |
436 | mp1->next = mp->next; | |
437 | break; | |
438 | } | |
439 | } | |
440 | safefree(mp->name); | |
441 | safefree(mp); | |
442 | return result; | |
443 | } | |
444 | ||
a0d0e21e LW |
445 | /* Added by Wayne Scott |
446 | * This is needed because the ldopen system call calls | |
447 | * calloc to allocated a block of date. The ldclose call calls free. | |
448 | * Without this we get this system calloc and perl's free, resulting | |
449 | * in a "Bad free" message. This way we always use perl's malloc. | |
450 | */ | |
451 | void *calloc(size_t ne, size_t sz) | |
452 | { | |
453 | void *out; | |
454 | ||
455 | out = (void *) safemalloc(ne*sz); | |
456 | memzero(out, ne*sz); | |
457 | return(out); | |
458 | } | |
459 | ||
460 | /* | |
461 | * Build the export table from the XCOFF .loader section. | |
462 | */ | |
463 | static int readExports(ModulePtr mp) | |
464 | { | |
5b877257 | 465 | dTHX; |
cdc73a10 | 466 | dMY_CXT; |
a0d0e21e | 467 | LDFILE *ldp = NULL; |
19e194ad JH |
468 | AIX_SCNHDR sh; |
469 | AIX_LDHDR *lhp; | |
a0d0e21e | 470 | char *ldbuf; |
19e194ad | 471 | AIX_LDSYM *ls; |
a0d0e21e LW |
472 | int i; |
473 | ExportPtr ep; | |
474 | ||
475 | if ((ldp = ldopen(mp->name, ldp)) == NULL) { | |
476 | struct ld_info *lp; | |
477 | char *buf; | |
478 | int size = 4*1024; | |
479 | if (errno != ENOENT) { | |
cdc73a10 JH |
480 | dl_errvalid++; |
481 | strcpy(dl_errbuf, "readExports: "); | |
482 | strerrorcat(dl_errbuf, errno); | |
a0d0e21e LW |
483 | return -1; |
484 | } | |
485 | /* | |
486 | * The module might be loaded due to the LIBPATH | |
487 | * environment variable. Search for the loaded | |
488 | * module using L_GETINFO. | |
489 | */ | |
490 | if ((buf = safemalloc(size)) == NULL) { | |
cdc73a10 JH |
491 | dl_errvalid++; |
492 | strcpy(dl_errbuf, "readExports: "); | |
493 | strerrorcat(dl_errbuf, errno); | |
a0d0e21e LW |
494 | return -1; |
495 | } | |
496 | while ((i = loadquery(L_GETINFO, buf, size)) == -1 && errno == ENOMEM) { | |
497 | safefree(buf); | |
498 | size += 4*1024; | |
499 | if ((buf = safemalloc(size)) == NULL) { | |
cdc73a10 JH |
500 | dl_errvalid++; |
501 | strcpy(dl_errbuf, "readExports: "); | |
502 | strerrorcat(dl_errbuf, errno); | |
a0d0e21e LW |
503 | return -1; |
504 | } | |
505 | } | |
506 | if (i == -1) { | |
cdc73a10 JH |
507 | dl_errvalid++; |
508 | strcpy(dl_errbuf, "readExports: "); | |
509 | strerrorcat(dl_errbuf, errno); | |
a0d0e21e LW |
510 | safefree(buf); |
511 | return -1; | |
512 | } | |
513 | /* | |
514 | * Traverse the list of loaded modules. The entry point | |
4e774c84 | 515 | * returned by LOAD() does actually point to the data |
a0d0e21e LW |
516 | * segment origin. |
517 | */ | |
518 | lp = (struct ld_info *)buf; | |
519 | while (lp) { | |
520 | if (lp->ldinfo_dataorg == mp->entry) { | |
521 | ldp = ldopen(lp->ldinfo_filename, ldp); | |
522 | break; | |
523 | } | |
524 | if (lp->ldinfo_next == 0) | |
525 | lp = NULL; | |
526 | else | |
527 | lp = (struct ld_info *)((char *)lp + lp->ldinfo_next); | |
528 | } | |
529 | safefree(buf); | |
530 | if (!ldp) { | |
cdc73a10 JH |
531 | dl_errvalid++; |
532 | strcpy(dl_errbuf, "readExports: "); | |
533 | strerrorcat(dl_errbuf, errno); | |
a0d0e21e LW |
534 | return -1; |
535 | } | |
536 | } | |
19e194ad JH |
537 | #ifdef USE_64_BIT_ALL |
538 | if (TYPE(ldp) != U803XTOCMAGIC) { | |
539 | #else | |
a0d0e21e | 540 | if (TYPE(ldp) != U802TOCMAGIC) { |
19e194ad | 541 | #endif |
cdc73a10 JH |
542 | dl_errvalid++; |
543 | strcpy(dl_errbuf, "readExports: bad magic"); | |
a0d0e21e LW |
544 | while(ldclose(ldp) == FAILURE) |
545 | ; | |
546 | return -1; | |
547 | } | |
548 | if (ldnshread(ldp, _LOADER, &sh) != SUCCESS) { | |
cdc73a10 JH |
549 | dl_errvalid++; |
550 | strcpy(dl_errbuf, "readExports: cannot read loader section header"); | |
a0d0e21e LW |
551 | while(ldclose(ldp) == FAILURE) |
552 | ; | |
553 | return -1; | |
554 | } | |
555 | /* | |
556 | * We read the complete loader section in one chunk, this makes | |
557 | * finding long symbol names residing in the string table easier. | |
558 | */ | |
559 | if ((ldbuf = (char *)safemalloc(sh.s_size)) == NULL) { | |
cdc73a10 JH |
560 | dl_errvalid++; |
561 | strcpy(dl_errbuf, "readExports: "); | |
562 | strerrorcat(dl_errbuf, errno); | |
a0d0e21e LW |
563 | while(ldclose(ldp) == FAILURE) |
564 | ; | |
565 | return -1; | |
566 | } | |
567 | if (FSEEK(ldp, sh.s_scnptr, BEGINNING) != OKFSEEK) { | |
cdc73a10 JH |
568 | dl_errvalid++; |
569 | strcpy(dl_errbuf, "readExports: cannot seek to loader section"); | |
a0d0e21e LW |
570 | safefree(ldbuf); |
571 | while(ldclose(ldp) == FAILURE) | |
572 | ; | |
573 | return -1; | |
574 | } | |
1553ab04 TB |
575 | /* This first case is a hack, since it assumes that the 3rd parameter to |
576 | FREAD is 1. See the redefinition of FREAD above to see how this works. */ | |
a0d0e21e | 577 | if (FREAD(ldbuf, sh.s_size, 1, ldp) != 1) { |
cdc73a10 JH |
578 | dl_errvalid++; |
579 | strcpy(dl_errbuf, "readExports: cannot read loader section"); | |
a0d0e21e LW |
580 | safefree(ldbuf); |
581 | while(ldclose(ldp) == FAILURE) | |
582 | ; | |
583 | return -1; | |
584 | } | |
19e194ad JH |
585 | lhp = (AIX_LDHDR *)ldbuf; |
586 | ls = (AIX_LDSYM *)(ldbuf+AIX_LDHDRSZ); | |
a0d0e21e LW |
587 | /* |
588 | * Count the number of exports to include in our export table. | |
589 | */ | |
590 | for (i = lhp->l_nsyms; i; i--, ls++) { | |
591 | if (!LDR_EXPORT(*ls)) | |
592 | continue; | |
593 | mp->nExports++; | |
594 | } | |
595 | Newz(1001, mp->exports, mp->nExports, Export); | |
596 | if (mp->exports == NULL) { | |
cdc73a10 JH |
597 | dl_errvalid++; |
598 | strcpy(dl_errbuf, "readExports: "); | |
599 | strerrorcat(dl_errbuf, errno); | |
a0d0e21e LW |
600 | safefree(ldbuf); |
601 | while(ldclose(ldp) == FAILURE) | |
602 | ; | |
603 | return -1; | |
604 | } | |
605 | /* | |
606 | * Fill in the export table. All entries are relative to | |
607 | * the entry point we got from load. | |
608 | */ | |
609 | ep = mp->exports; | |
19e194ad | 610 | ls = (AIX_LDSYM *)(ldbuf+AIX_LDHDRSZ); |
a0d0e21e LW |
611 | for (i = lhp->l_nsyms; i; i--, ls++) { |
612 | char *symname; | |
613 | if (!LDR_EXPORT(*ls)) | |
614 | continue; | |
19e194ad | 615 | #ifndef USE_64_BIT_ALL |
a0d0e21e | 616 | if (ls->l_zeroes == 0) |
19e194ad | 617 | #endif |
a0d0e21e | 618 | symname = ls->l_offset+lhp->l_stoff+ldbuf; |
19e194ad | 619 | #ifndef USE_64_BIT_ALL |
a0d0e21e LW |
620 | else |
621 | symname = ls->l_name; | |
19e194ad | 622 | #endif |
a0d0e21e LW |
623 | ep->name = savepv(symname); |
624 | ep->addr = (void *)((unsigned long)mp->entry + ls->l_value); | |
625 | ep++; | |
626 | } | |
627 | safefree(ldbuf); | |
628 | while(ldclose(ldp) == FAILURE) | |
629 | ; | |
630 | return 0; | |
631 | } | |
632 | ||
7ca86468 GS |
633 | /* |
634 | * Find the main modules entry point. This is used as export pointer | |
635 | * for loadbind() to be able to resolve references to the main part. | |
636 | */ | |
637 | static void * findMain(void) | |
638 | { | |
cdc73a10 JH |
639 | dTHX; |
640 | dMY_CXT; | |
7ca86468 GS |
641 | struct ld_info *lp; |
642 | char *buf; | |
643 | int size = 4*1024; | |
644 | int i; | |
645 | void *ret; | |
646 | ||
647 | if ((buf = safemalloc(size)) == NULL) { | |
cdc73a10 JH |
648 | dl_errvalid++; |
649 | strcpy(dl_errbuf, "findMain: "); | |
650 | strerrorcat(dl_errbuf, errno); | |
7ca86468 GS |
651 | return NULL; |
652 | } | |
653 | while ((i = loadquery(L_GETINFO, buf, size)) == -1 && errno == ENOMEM) { | |
654 | safefree(buf); | |
655 | size += 4*1024; | |
656 | if ((buf = safemalloc(size)) == NULL) { | |
cdc73a10 JH |
657 | dl_errvalid++; |
658 | strcpy(dl_errbuf, "findMain: "); | |
659 | strerrorcat(dl_errbuf, errno); | |
7ca86468 GS |
660 | return NULL; |
661 | } | |
662 | } | |
663 | if (i == -1) { | |
cdc73a10 JH |
664 | dl_errvalid++; |
665 | strcpy(dl_errbuf, "findMain: "); | |
666 | strerrorcat(dl_errbuf, errno); | |
7ca86468 GS |
667 | safefree(buf); |
668 | return NULL; | |
669 | } | |
670 | /* | |
671 | * The first entry is the main module. The entry point | |
672 | * returned by load() does actually point to the data | |
673 | * segment origin. | |
674 | */ | |
675 | lp = (struct ld_info *)buf; | |
676 | ret = lp->ldinfo_dataorg; | |
677 | safefree(buf); | |
678 | return ret; | |
679 | } | |
61d42ce4 | 680 | #endif /* USE_NATIVE_DLOPEN */ |
7ca86468 | 681 | |
a0d0e21e LW |
682 | /* dl_dlopen.xs |
683 | * | |
684 | * Platform: SunOS/Solaris, possibly others which use dlopen. | |
0536e0eb | 685 | * Author: Paul Marquess (Paul.Marquess@btinternet.com) |
a0d0e21e LW |
686 | * Created: 10th July 1994 |
687 | * | |
688 | * Modified: | |
689 | * 15th July 1994 - Added code to explicitly save any error messages. | |
690 | * 3rd August 1994 - Upgraded to v3 spec. | |
691 | * 9th August 1994 - Changed to use IV | |
692 | * 10th August 1994 - Tim Bunce: Added RTLD_LAZY, switchable debugging, | |
693 | * basic FreeBSD support, removed ClearError | |
694 | * | |
695 | */ | |
696 | ||
697 | /* Porting notes: | |
698 | ||
699 | see dl_dlopen.xs | |
700 | ||
701 | */ | |
702 | ||
a0d0e21e | 703 | static void |
cea2e8a9 | 704 | dl_private_init(pTHX) |
a0d0e21e | 705 | { |
cea2e8a9 | 706 | (void)dl_generic_private_init(aTHX); |
a0d0e21e LW |
707 | } |
708 | ||
709 | MODULE = DynaLoader PACKAGE = DynaLoader | |
710 | ||
711 | BOOT: | |
cea2e8a9 | 712 | (void)dl_private_init(aTHX); |
a0d0e21e LW |
713 | |
714 | ||
715 | void * | |
ff7f3c60 NIS |
716 | dl_load_file(filename, flags=0) |
717 | char * filename | |
718 | int flags | |
a0d0e21e | 719 | CODE: |
bf49b057 | 720 | DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_load_file(%s,%x):\n", filename,flags)); |
ff7f3c60 | 721 | if (flags & 0x01) |
cea2e8a9 | 722 | Perl_warn(aTHX_ "Can't make loaded symbols global on this platform while loading %s",filename); |
61d42ce4 | 723 | RETVAL = dlopen(filename, RTLD_GLOBAL|RTLD_LAZY) ; |
bf49b057 | 724 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, " libref=%x\n", RETVAL)); |
a0d0e21e LW |
725 | ST(0) = sv_newmortal() ; |
726 | if (RETVAL == NULL) | |
cea2e8a9 | 727 | SaveError(aTHX_ "%s",dlerror()) ; |
a0d0e21e | 728 | else |
3175b8cd | 729 | sv_setiv( ST(0), PTR2IV(RETVAL) ); |
a0d0e21e | 730 | |
7ca86468 GS |
731 | int |
732 | dl_unload_file(libref) | |
733 | void * libref | |
734 | CODE: | |
735 | DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_unload_file(%lx):\n", libref)); | |
736 | RETVAL = (dlclose(libref) == 0 ? 1 : 0); | |
737 | if (!RETVAL) | |
738 | SaveError(aTHX_ "%s", dlerror()) ; | |
739 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, " retval = %d\n", RETVAL)); | |
740 | OUTPUT: | |
741 | RETVAL | |
a0d0e21e LW |
742 | |
743 | void * | |
744 | dl_find_symbol(libhandle, symbolname) | |
745 | void * libhandle | |
746 | char * symbolname | |
747 | CODE: | |
bf49b057 | 748 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_find_symbol(handle=%x, symbol=%s)\n", |
a0d0e21e LW |
749 | libhandle, symbolname)); |
750 | RETVAL = dlsym(libhandle, symbolname); | |
bf49b057 | 751 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, " symbolref = %x\n", RETVAL)); |
a0d0e21e LW |
752 | ST(0) = sv_newmortal() ; |
753 | if (RETVAL == NULL) | |
cea2e8a9 | 754 | SaveError(aTHX_ "%s",dlerror()) ; |
a0d0e21e | 755 | else |
f66f545a | 756 | sv_setiv( ST(0), PTR2IV(RETVAL)); |
a0d0e21e LW |
757 | |
758 | ||
759 | void | |
760 | dl_undef_symbols() | |
761 | PPCODE: | |
762 | ||
763 | ||
764 | ||
765 | # These functions should not need changing on any platform: | |
766 | ||
767 | void | |
768 | dl_install_xsub(perl_name, symref, filename="$Package") | |
769 | char * perl_name | |
770 | void * symref | |
771 | char * filename | |
772 | CODE: | |
bf49b057 | 773 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_install_xsub(name=%s, symref=%x)\n", |
a0d0e21e | 774 | perl_name, symref)); |
cea2e8a9 GS |
775 | ST(0) = sv_2mortal(newRV((SV*)newXS(perl_name, |
776 | (void(*)(pTHX_ CV *))symref, | |
777 | filename))); | |
a0d0e21e LW |
778 | |
779 | ||
780 | char * | |
781 | dl_error() | |
782 | CODE: | |
cdc73a10 JH |
783 | dMY_CXT; |
784 | RETVAL = dl_last_error ; | |
a0d0e21e LW |
785 | OUTPUT: |
786 | RETVAL | |
787 | ||
788 | # end. |