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 | ||
c6a08c25 JH |
29 | #include "dlutils.c" /* SaveError() etc */ |
30 | ||
61d42ce4 JH |
31 | #else |
32 | ||
33 | /* | |
a0d0e21e LW |
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35 | * This is an unpublished work copyright (c) 1992 Helios Software GmbH | |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 JH |
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 LW |
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 GS |
58 | #undef FREAD |
59 | #undef FWRITE | |
a0d0e21e LW |
60 | #include <ldfcn.h> |
61 | ||
19e194ad JH |
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 SB |
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 JH |
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 JH |
83 | #ifdef USE_libC /* The define comes, when it comes, from hints/aix.pl. */ |
84 | # define LOAD loadAndInit | |
4e774c84 | 85 | # define UNLOAD terminateAndUnload |
3a7209f1 JH |
86 | # if defined(USE_vacpp_load_h) |
87 | # include "/usr/vacpp/include/load.h" | |
bab3591f JH |
88 | # elif defined(USE_ibmcxx_load_h) |
89 | # include "/usr/ibmcxx/include/load.h" | |
3a7209f1 JH |
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 SB |
95 | #else |
96 | # define LOAD load | |
97 | # define UNLOAD unload | |
98 | #endif | |
99 | ||
ee580363 GS |
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 JH |
114 | #ifndef RTLD_LAZY |
115 | # define RTLD_LAZY 0 | |
116 | #endif | |
117 | #ifndef RTLD_GLOBAL | |
118 | # define RTLD_GLOBAL 0 | |
119 | #endif | |
120 | ||
a0d0e21e LW |
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 JH |
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 JH |
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 LW |
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 JH |
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 JH |
178 | int strsiz = strlen(str); |
179 | int msgsiz; | |
180 | char *msg; | |
181 | ||
48c64e3e | 182 | dTHX; |
48c64e3e | 183 | |
ce637636 JH |
184 | if ((msg = strerror(err)) == 0) |
185 | msg = strerror_failed; | |
186 | msgsiz = strlen(msg); /* Note msg = buf and free() above. */ | |
187 | if (strsiz + msgsiz < BUFSIZ) /* Do not move this after #endif. */ | |
188 | strcat(str, msg); | |
ce637636 | 189 | |
fd206186 JH |
190 | return str; |
191 | } | |
ce637636 | 192 | |
fd206186 | 193 | char *strerrorcpy(char *str, int err) { |
ce637636 JH |
194 | int msgsiz; |
195 | char *msg; | |
196 | ||
48c64e3e | 197 | dTHX; |
48c64e3e | 198 | |
ce637636 JH |
199 | if ((msg = strerror(err)) == 0) |
200 | msg = strerror_failed; | |
201 | msgsiz = strlen(msg); /* Note msg = buf and free() above. */ | |
202 | if (msgsiz < BUFSIZ) /* Do not move this after #endif. */ | |
203 | strcpy(str, msg); | |
ce637636 | 204 | |
fd206186 JH |
205 | return str; |
206 | } | |
a0d0e21e LW |
207 | |
208 | /* ARGSUSED */ | |
209 | void *dlopen(char *path, int mode) | |
210 | { | |
5b877257 | 211 | dTHX; |
cdc73a10 | 212 | dMY_CXT; |
a0d0e21e | 213 | register ModulePtr mp; |
a0d0e21e LW |
214 | |
215 | /* | |
216 | * Upon the first call register a terminate handler that will | |
f6b3007c | 217 | * close all libraries. |
a0d0e21e | 218 | */ |
cdc73a10 JH |
219 | if (dl_mainModule == NULL) { |
220 | if ((dl_mainModule = findMain()) == NULL) | |
7ca86468 | 221 | return NULL; |
a0d0e21e LW |
222 | } |
223 | /* | |
224 | * Scan the list of modules if have the module already loaded. | |
225 | */ | |
cdc73a10 | 226 | for (mp = dl_modList; mp; mp = mp->next) |
a0d0e21e LW |
227 | if (strcmp(mp->name, path) == 0) { |
228 | mp->refCnt++; | |
229 | return mp; | |
230 | } | |
a02a5408 | 231 | Newxz(mp,1,Module); |
a0d0e21e | 232 | if (mp == NULL) { |
cdc73a10 JH |
233 | dl_errvalid++; |
234 | strcpy(dl_errbuf, "Newz: "); | |
235 | strerrorcat(dl_errbuf, errno); | |
a0d0e21e LW |
236 | return NULL; |
237 | } | |
238 | ||
239 | if ((mp->name = savepv(path)) == NULL) { | |
cdc73a10 JH |
240 | dl_errvalid++; |
241 | strcpy(dl_errbuf, "savepv: "); | |
242 | strerrorcat(dl_errbuf, errno); | |
a0d0e21e LW |
243 | safefree(mp); |
244 | return NULL; | |
245 | } | |
549a6b10 | 246 | |
a0d0e21e LW |
247 | /* |
248 | * load should be declared load(const char *...). Thus we | |
249 | * cast the path to a normal char *. Ugly. | |
250 | */ | |
4e774c84 | 251 | if ((mp->entry = (void *)LOAD((char *)path, |
549a6b10 JH |
252 | #ifdef L_LIBPATH_EXEC |
253 | L_LIBPATH_EXEC | | |
254 | #endif | |
255 | L_NOAUTODEFER, | |
256 | NULL)) == NULL) { | |
257 | int saverrno = errno; | |
258 | ||
a0d0e21e LW |
259 | safefree(mp->name); |
260 | safefree(mp); | |
cdc73a10 JH |
261 | dl_errvalid++; |
262 | strcpy(dl_errbuf, "dlopen: "); | |
263 | strcat(dl_errbuf, path); | |
264 | strcat(dl_errbuf, ": "); | |
a0d0e21e LW |
265 | /* |
266 | * If AIX says the file is not executable, the error | |
267 | * can be further described by querying the loader about | |
268 | * the last error. | |
269 | */ | |
549a6b10 JH |
270 | if (saverrno == ENOEXEC) { |
271 | char *moreinfo[BUFSIZ/sizeof(char *)]; | |
272 | if (loadquery(L_GETMESSAGES, moreinfo, sizeof(moreinfo)) == -1) | |
cdc73a10 | 273 | strerrorcpy(dl_errbuf, saverrno); |
a0d0e21e LW |
274 | else { |
275 | char **p; | |
549a6b10 | 276 | for (p = moreinfo; *p; p++) |
a0d0e21e LW |
277 | caterr(*p); |
278 | } | |
279 | } else | |
cdc73a10 | 280 | strerrorcat(dl_errbuf, saverrno); |
a0d0e21e LW |
281 | return NULL; |
282 | } | |
283 | mp->refCnt = 1; | |
cdc73a10 JH |
284 | mp->next = dl_modList; |
285 | dl_modList = mp; | |
f6b3007c JH |
286 | /* |
287 | * Assume anonymous exports come from the module this dlopen | |
288 | * is linked into, that holds true as long as dlopen and all | |
7ca86468 GS |
289 | * of the perl core are in the same shared object. Also bind |
290 | * against the main part, in the case a perl is not the main | |
291 | * part, e.g mod_perl as DSO in Apache so perl modules can | |
292 | * also reference Apache symbols. | |
f6b3007c | 293 | */ |
7ca86468 | 294 | if (loadbind(0, (void *)dlopen, mp->entry) == -1 || |
cdc73a10 | 295 | loadbind(0, dl_mainModule, mp->entry)) { |
549a6b10 JH |
296 | int saverrno = errno; |
297 | ||
a0d0e21e | 298 | dlclose(mp); |
cdc73a10 JH |
299 | dl_errvalid++; |
300 | strcpy(dl_errbuf, "loadbind: "); | |
301 | strerrorcat(dl_errbuf, saverrno); | |
a0d0e21e LW |
302 | return NULL; |
303 | } | |
304 | if (readExports(mp) == -1) { | |
305 | dlclose(mp); | |
306 | return NULL; | |
307 | } | |
308 | return mp; | |
309 | } | |
310 | ||
311 | /* | |
312 | * Attempt to decipher an AIX loader error message and append it | |
313 | * to our static error message buffer. | |
314 | */ | |
315 | static void caterr(char *s) | |
316 | { | |
cdc73a10 JH |
317 | dTHX; |
318 | dMY_CXT; | |
a0d0e21e LW |
319 | register char *p = s; |
320 | ||
321 | while (*p >= '0' && *p <= '9') | |
322 | p++; | |
323 | switch(atoi(s)) { | |
324 | case L_ERROR_TOOMANY: | |
cdc73a10 | 325 | strcat(dl_errbuf, "too many errors"); |
a0d0e21e LW |
326 | break; |
327 | case L_ERROR_NOLIB: | |
cdc73a10 JH |
328 | strcat(dl_errbuf, "can't load library"); |
329 | strcat(dl_errbuf, p); | |
a0d0e21e LW |
330 | break; |
331 | case L_ERROR_UNDEF: | |
cdc73a10 JH |
332 | strcat(dl_errbuf, "can't find symbol"); |
333 | strcat(dl_errbuf, p); | |
a0d0e21e LW |
334 | break; |
335 | case L_ERROR_RLDBAD: | |
cdc73a10 JH |
336 | strcat(dl_errbuf, "bad RLD"); |
337 | strcat(dl_errbuf, p); | |
a0d0e21e LW |
338 | break; |
339 | case L_ERROR_FORMAT: | |
cdc73a10 JH |
340 | strcat(dl_errbuf, "bad exec format in"); |
341 | strcat(dl_errbuf, p); | |
a0d0e21e LW |
342 | break; |
343 | case L_ERROR_ERRNO: | |
cdc73a10 | 344 | strerrorcat(dl_errbuf, atoi(++p)); |
a0d0e21e LW |
345 | break; |
346 | default: | |
cdc73a10 | 347 | strcat(dl_errbuf, s); |
a0d0e21e LW |
348 | break; |
349 | } | |
350 | } | |
351 | ||
352 | void *dlsym(void *handle, const char *symbol) | |
353 | { | |
cdc73a10 JH |
354 | dTHX; |
355 | dMY_CXT; | |
a0d0e21e LW |
356 | register ModulePtr mp = (ModulePtr)handle; |
357 | register ExportPtr ep; | |
358 | register int i; | |
359 | ||
360 | /* | |
361 | * Could speed up search, but I assume that one assigns | |
362 | * the result to function pointers anyways. | |
363 | */ | |
364 | for (ep = mp->exports, i = mp->nExports; i; i--, ep++) | |
365 | if (strcmp(ep->name, symbol) == 0) | |
366 | return ep->addr; | |
cdc73a10 JH |
367 | dl_errvalid++; |
368 | strcpy(dl_errbuf, "dlsym: undefined symbol "); | |
369 | strcat(dl_errbuf, symbol); | |
a0d0e21e LW |
370 | return NULL; |
371 | } | |
372 | ||
373 | char *dlerror(void) | |
374 | { | |
cdc73a10 JH |
375 | dTHX; |
376 | dMY_CXT; | |
377 | if (dl_errvalid) { | |
378 | dl_errvalid = 0; | |
379 | return dl_errbuf; | |
a0d0e21e LW |
380 | } |
381 | return NULL; | |
382 | } | |
383 | ||
384 | int dlclose(void *handle) | |
385 | { | |
cdc73a10 JH |
386 | dTHX; |
387 | dMY_CXT; | |
a0d0e21e LW |
388 | register ModulePtr mp = (ModulePtr)handle; |
389 | int result; | |
390 | register ModulePtr mp1; | |
391 | ||
392 | if (--mp->refCnt > 0) | |
393 | return 0; | |
4e774c84 | 394 | result = UNLOAD(mp->entry); |
a0d0e21e | 395 | if (result == -1) { |
cdc73a10 JH |
396 | dl_errvalid++; |
397 | strerrorcpy(dl_errbuf, errno); | |
a0d0e21e LW |
398 | } |
399 | if (mp->exports) { | |
400 | register ExportPtr ep; | |
401 | register int i; | |
402 | for (ep = mp->exports, i = mp->nExports; i; i--, ep++) | |
403 | if (ep->name) | |
404 | safefree(ep->name); | |
405 | safefree(mp->exports); | |
406 | } | |
cdc73a10 JH |
407 | if (mp == dl_modList) |
408 | dl_modList = mp->next; | |
a0d0e21e | 409 | else { |
cdc73a10 | 410 | for (mp1 = dl_modList; mp1; mp1 = mp1->next) |
a0d0e21e LW |
411 | if (mp1->next == mp) { |
412 | mp1->next = mp->next; | |
413 | break; | |
414 | } | |
415 | } | |
416 | safefree(mp->name); | |
417 | safefree(mp); | |
418 | return result; | |
419 | } | |
420 | ||
a0d0e21e LW |
421 | /* Added by Wayne Scott |
422 | * This is needed because the ldopen system call calls | |
423 | * calloc to allocated a block of date. The ldclose call calls free. | |
424 | * Without this we get this system calloc and perl's free, resulting | |
425 | * in a "Bad free" message. This way we always use perl's malloc. | |
426 | */ | |
427 | void *calloc(size_t ne, size_t sz) | |
428 | { | |
429 | void *out; | |
430 | ||
431 | out = (void *) safemalloc(ne*sz); | |
432 | memzero(out, ne*sz); | |
433 | return(out); | |
434 | } | |
435 | ||
436 | /* | |
437 | * Build the export table from the XCOFF .loader section. | |
438 | */ | |
439 | static int readExports(ModulePtr mp) | |
440 | { | |
5b877257 | 441 | dTHX; |
cdc73a10 | 442 | dMY_CXT; |
a0d0e21e | 443 | LDFILE *ldp = NULL; |
19e194ad JH |
444 | AIX_SCNHDR sh; |
445 | AIX_LDHDR *lhp; | |
a0d0e21e | 446 | char *ldbuf; |
19e194ad | 447 | AIX_LDSYM *ls; |
a0d0e21e LW |
448 | int i; |
449 | ExportPtr ep; | |
450 | ||
451 | if ((ldp = ldopen(mp->name, ldp)) == NULL) { | |
452 | struct ld_info *lp; | |
453 | char *buf; | |
454 | int size = 4*1024; | |
455 | if (errno != ENOENT) { | |
cdc73a10 JH |
456 | dl_errvalid++; |
457 | strcpy(dl_errbuf, "readExports: "); | |
458 | strerrorcat(dl_errbuf, errno); | |
a0d0e21e LW |
459 | return -1; |
460 | } | |
461 | /* | |
462 | * The module might be loaded due to the LIBPATH | |
463 | * environment variable. Search for the loaded | |
464 | * module using L_GETINFO. | |
465 | */ | |
466 | if ((buf = safemalloc(size)) == NULL) { | |
cdc73a10 JH |
467 | dl_errvalid++; |
468 | strcpy(dl_errbuf, "readExports: "); | |
469 | strerrorcat(dl_errbuf, errno); | |
a0d0e21e LW |
470 | return -1; |
471 | } | |
472 | while ((i = loadquery(L_GETINFO, buf, size)) == -1 && errno == ENOMEM) { | |
473 | safefree(buf); | |
474 | size += 4*1024; | |
475 | if ((buf = safemalloc(size)) == NULL) { | |
cdc73a10 JH |
476 | dl_errvalid++; |
477 | strcpy(dl_errbuf, "readExports: "); | |
478 | strerrorcat(dl_errbuf, errno); | |
a0d0e21e LW |
479 | return -1; |
480 | } | |
481 | } | |
482 | if (i == -1) { | |
cdc73a10 JH |
483 | dl_errvalid++; |
484 | strcpy(dl_errbuf, "readExports: "); | |
485 | strerrorcat(dl_errbuf, errno); | |
a0d0e21e LW |
486 | safefree(buf); |
487 | return -1; | |
488 | } | |
489 | /* | |
490 | * Traverse the list of loaded modules. The entry point | |
4e774c84 | 491 | * returned by LOAD() does actually point to the data |
a0d0e21e LW |
492 | * segment origin. |
493 | */ | |
494 | lp = (struct ld_info *)buf; | |
495 | while (lp) { | |
496 | if (lp->ldinfo_dataorg == mp->entry) { | |
497 | ldp = ldopen(lp->ldinfo_filename, ldp); | |
498 | break; | |
499 | } | |
500 | if (lp->ldinfo_next == 0) | |
501 | lp = NULL; | |
502 | else | |
503 | lp = (struct ld_info *)((char *)lp + lp->ldinfo_next); | |
504 | } | |
505 | safefree(buf); | |
506 | if (!ldp) { | |
cdc73a10 JH |
507 | dl_errvalid++; |
508 | strcpy(dl_errbuf, "readExports: "); | |
509 | strerrorcat(dl_errbuf, errno); | |
a0d0e21e LW |
510 | return -1; |
511 | } | |
512 | } | |
19e194ad JH |
513 | #ifdef USE_64_BIT_ALL |
514 | if (TYPE(ldp) != U803XTOCMAGIC) { | |
515 | #else | |
a0d0e21e | 516 | if (TYPE(ldp) != U802TOCMAGIC) { |
19e194ad | 517 | #endif |
cdc73a10 JH |
518 | dl_errvalid++; |
519 | strcpy(dl_errbuf, "readExports: bad magic"); | |
a0d0e21e LW |
520 | while(ldclose(ldp) == FAILURE) |
521 | ; | |
522 | return -1; | |
523 | } | |
524 | if (ldnshread(ldp, _LOADER, &sh) != SUCCESS) { | |
cdc73a10 JH |
525 | dl_errvalid++; |
526 | strcpy(dl_errbuf, "readExports: cannot read loader section header"); | |
a0d0e21e LW |
527 | while(ldclose(ldp) == FAILURE) |
528 | ; | |
529 | return -1; | |
530 | } | |
531 | /* | |
532 | * We read the complete loader section in one chunk, this makes | |
533 | * finding long symbol names residing in the string table easier. | |
534 | */ | |
535 | if ((ldbuf = (char *)safemalloc(sh.s_size)) == NULL) { | |
cdc73a10 JH |
536 | dl_errvalid++; |
537 | strcpy(dl_errbuf, "readExports: "); | |
538 | strerrorcat(dl_errbuf, errno); | |
a0d0e21e LW |
539 | while(ldclose(ldp) == FAILURE) |
540 | ; | |
541 | return -1; | |
542 | } | |
543 | if (FSEEK(ldp, sh.s_scnptr, BEGINNING) != OKFSEEK) { | |
cdc73a10 JH |
544 | dl_errvalid++; |
545 | strcpy(dl_errbuf, "readExports: cannot seek to loader section"); | |
a0d0e21e LW |
546 | safefree(ldbuf); |
547 | while(ldclose(ldp) == FAILURE) | |
548 | ; | |
549 | return -1; | |
550 | } | |
1553ab04 TB |
551 | /* This first case is a hack, since it assumes that the 3rd parameter to |
552 | FREAD is 1. See the redefinition of FREAD above to see how this works. */ | |
a0d0e21e | 553 | if (FREAD(ldbuf, sh.s_size, 1, ldp) != 1) { |
cdc73a10 JH |
554 | dl_errvalid++; |
555 | strcpy(dl_errbuf, "readExports: cannot read loader section"); | |
a0d0e21e LW |
556 | safefree(ldbuf); |
557 | while(ldclose(ldp) == FAILURE) | |
558 | ; | |
559 | return -1; | |
560 | } | |
19e194ad JH |
561 | lhp = (AIX_LDHDR *)ldbuf; |
562 | ls = (AIX_LDSYM *)(ldbuf+AIX_LDHDRSZ); | |
a0d0e21e LW |
563 | /* |
564 | * Count the number of exports to include in our export table. | |
565 | */ | |
566 | for (i = lhp->l_nsyms; i; i--, ls++) { | |
567 | if (!LDR_EXPORT(*ls)) | |
568 | continue; | |
569 | mp->nExports++; | |
570 | } | |
a02a5408 | 571 | Newxz(mp->exports, mp->nExports, Export); |
a0d0e21e | 572 | if (mp->exports == NULL) { |
cdc73a10 JH |
573 | dl_errvalid++; |
574 | strcpy(dl_errbuf, "readExports: "); | |
575 | strerrorcat(dl_errbuf, errno); | |
a0d0e21e LW |
576 | safefree(ldbuf); |
577 | while(ldclose(ldp) == FAILURE) | |
578 | ; | |
579 | return -1; | |
580 | } | |
581 | /* | |
582 | * Fill in the export table. All entries are relative to | |
583 | * the entry point we got from load. | |
584 | */ | |
585 | ep = mp->exports; | |
19e194ad | 586 | ls = (AIX_LDSYM *)(ldbuf+AIX_LDHDRSZ); |
a0d0e21e LW |
587 | for (i = lhp->l_nsyms; i; i--, ls++) { |
588 | char *symname; | |
589 | if (!LDR_EXPORT(*ls)) | |
590 | continue; | |
19e194ad | 591 | #ifndef USE_64_BIT_ALL |
a0d0e21e | 592 | if (ls->l_zeroes == 0) |
19e194ad | 593 | #endif |
a0d0e21e | 594 | symname = ls->l_offset+lhp->l_stoff+ldbuf; |
19e194ad | 595 | #ifndef USE_64_BIT_ALL |
a0d0e21e LW |
596 | else |
597 | symname = ls->l_name; | |
19e194ad | 598 | #endif |
a0d0e21e LW |
599 | ep->name = savepv(symname); |
600 | ep->addr = (void *)((unsigned long)mp->entry + ls->l_value); | |
601 | ep++; | |
602 | } | |
603 | safefree(ldbuf); | |
604 | while(ldclose(ldp) == FAILURE) | |
605 | ; | |
606 | return 0; | |
607 | } | |
608 | ||
7ca86468 GS |
609 | /* |
610 | * Find the main modules entry point. This is used as export pointer | |
611 | * for loadbind() to be able to resolve references to the main part. | |
612 | */ | |
613 | static void * findMain(void) | |
614 | { | |
cdc73a10 JH |
615 | dTHX; |
616 | dMY_CXT; | |
7ca86468 GS |
617 | struct ld_info *lp; |
618 | char *buf; | |
619 | int size = 4*1024; | |
620 | int i; | |
621 | void *ret; | |
622 | ||
623 | if ((buf = safemalloc(size)) == NULL) { | |
cdc73a10 JH |
624 | dl_errvalid++; |
625 | strcpy(dl_errbuf, "findMain: "); | |
626 | strerrorcat(dl_errbuf, errno); | |
7ca86468 GS |
627 | return NULL; |
628 | } | |
629 | while ((i = loadquery(L_GETINFO, buf, size)) == -1 && errno == ENOMEM) { | |
630 | safefree(buf); | |
631 | size += 4*1024; | |
632 | if ((buf = safemalloc(size)) == NULL) { | |
cdc73a10 JH |
633 | dl_errvalid++; |
634 | strcpy(dl_errbuf, "findMain: "); | |
635 | strerrorcat(dl_errbuf, errno); | |
7ca86468 GS |
636 | return NULL; |
637 | } | |
638 | } | |
639 | if (i == -1) { | |
cdc73a10 JH |
640 | dl_errvalid++; |
641 | strcpy(dl_errbuf, "findMain: "); | |
642 | strerrorcat(dl_errbuf, errno); | |
7ca86468 GS |
643 | safefree(buf); |
644 | return NULL; | |
645 | } | |
646 | /* | |
647 | * The first entry is the main module. The entry point | |
648 | * returned by load() does actually point to the data | |
649 | * segment origin. | |
650 | */ | |
651 | lp = (struct ld_info *)buf; | |
652 | ret = lp->ldinfo_dataorg; | |
653 | safefree(buf); | |
654 | return ret; | |
655 | } | |
61d42ce4 | 656 | #endif /* USE_NATIVE_DLOPEN */ |
7ca86468 | 657 | |
a0d0e21e LW |
658 | /* dl_dlopen.xs |
659 | * | |
660 | * Platform: SunOS/Solaris, possibly others which use dlopen. | |
0536e0eb | 661 | * Author: Paul Marquess (Paul.Marquess@btinternet.com) |
a0d0e21e LW |
662 | * Created: 10th July 1994 |
663 | * | |
664 | * Modified: | |
665 | * 15th July 1994 - Added code to explicitly save any error messages. | |
666 | * 3rd August 1994 - Upgraded to v3 spec. | |
667 | * 9th August 1994 - Changed to use IV | |
668 | * 10th August 1994 - Tim Bunce: Added RTLD_LAZY, switchable debugging, | |
669 | * basic FreeBSD support, removed ClearError | |
670 | * | |
671 | */ | |
672 | ||
673 | /* Porting notes: | |
674 | ||
675 | see dl_dlopen.xs | |
676 | ||
677 | */ | |
678 | ||
a0d0e21e | 679 | static void |
cea2e8a9 | 680 | dl_private_init(pTHX) |
a0d0e21e | 681 | { |
cea2e8a9 | 682 | (void)dl_generic_private_init(aTHX); |
a0d0e21e LW |
683 | } |
684 | ||
685 | MODULE = DynaLoader PACKAGE = DynaLoader | |
686 | ||
687 | BOOT: | |
cea2e8a9 | 688 | (void)dl_private_init(aTHX); |
a0d0e21e LW |
689 | |
690 | ||
691 | void * | |
ff7f3c60 NIS |
692 | dl_load_file(filename, flags=0) |
693 | char * filename | |
694 | int flags | |
a0d0e21e | 695 | CODE: |
bf49b057 | 696 | DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_load_file(%s,%x):\n", filename,flags)); |
ff7f3c60 | 697 | if (flags & 0x01) |
cea2e8a9 | 698 | Perl_warn(aTHX_ "Can't make loaded symbols global on this platform while loading %s",filename); |
61d42ce4 | 699 | RETVAL = dlopen(filename, RTLD_GLOBAL|RTLD_LAZY) ; |
bf49b057 | 700 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, " libref=%x\n", RETVAL)); |
a0d0e21e LW |
701 | ST(0) = sv_newmortal() ; |
702 | if (RETVAL == NULL) | |
cea2e8a9 | 703 | SaveError(aTHX_ "%s",dlerror()) ; |
a0d0e21e | 704 | else |
3175b8cd | 705 | sv_setiv( ST(0), PTR2IV(RETVAL) ); |
a0d0e21e | 706 | |
7ca86468 GS |
707 | int |
708 | dl_unload_file(libref) | |
709 | void * libref | |
710 | CODE: | |
711 | DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_unload_file(%lx):\n", libref)); | |
712 | RETVAL = (dlclose(libref) == 0 ? 1 : 0); | |
713 | if (!RETVAL) | |
714 | SaveError(aTHX_ "%s", dlerror()) ; | |
715 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, " retval = %d\n", RETVAL)); | |
716 | OUTPUT: | |
717 | RETVAL | |
a0d0e21e LW |
718 | |
719 | void * | |
720 | dl_find_symbol(libhandle, symbolname) | |
721 | void * libhandle | |
722 | char * symbolname | |
723 | CODE: | |
bf49b057 | 724 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_find_symbol(handle=%x, symbol=%s)\n", |
a0d0e21e LW |
725 | libhandle, symbolname)); |
726 | RETVAL = dlsym(libhandle, symbolname); | |
bf49b057 | 727 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, " symbolref = %x\n", RETVAL)); |
a0d0e21e LW |
728 | ST(0) = sv_newmortal() ; |
729 | if (RETVAL == NULL) | |
cea2e8a9 | 730 | SaveError(aTHX_ "%s",dlerror()) ; |
a0d0e21e | 731 | else |
f66f545a | 732 | sv_setiv( ST(0), PTR2IV(RETVAL)); |
a0d0e21e LW |
733 | |
734 | ||
735 | void | |
736 | dl_undef_symbols() | |
737 | PPCODE: | |
738 | ||
739 | ||
740 | ||
741 | # These functions should not need changing on any platform: | |
742 | ||
743 | void | |
744 | dl_install_xsub(perl_name, symref, filename="$Package") | |
745 | char * perl_name | |
746 | void * symref | |
747 | char * filename | |
748 | CODE: | |
bf49b057 | 749 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_install_xsub(name=%s, symref=%x)\n", |
a0d0e21e | 750 | perl_name, symref)); |
77004dee NC |
751 | ST(0) = sv_2mortal(newRV((SV*)newXS_flags(perl_name, |
752 | (void(*)(pTHX_ CV *))symref, | |
753 | filename, NULL, | |
754 | XS_DYNAMIC_FILENAME))); | |
a0d0e21e LW |
755 | |
756 | ||
757 | char * | |
758 | dl_error() | |
759 | CODE: | |
cdc73a10 JH |
760 | dMY_CXT; |
761 | RETVAL = dl_last_error ; | |
a0d0e21e LW |
762 | OUTPUT: |
763 | RETVAL | |
764 | ||
765 | # end. |