source: trunk/essentials/dev-lang/perl/ext/DynaLoader/dl_aix.xs@ 3298

Last change on this file since 3298 was 3181, checked in by bird, 19 years ago

perl 5.8.8
File size: 18.5 KB
Line 
1/* dl_aix.xs
2 *
3 * Written: 8/31/94 by Wayne Scott ([email protected])
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
14#define PERLIO_NOT_STDIO 0
15
16/*
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 [email protected]
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#include "dlutils.c" /* SaveError() etc */
30
31#else
32
33/*
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35 * This is an unpublished work copyright (c) 1992 Helios Software GmbH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
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 * <[email protected]> */
46#ifdef USE_64_BIT_ALL
47# define __XCOFF64__
48# define __XCOFF32__
49#endif
50
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>
58#undef FREAD
59#undef FWRITE
60#include <ldfcn.h>
61
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
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 <[email protected]> */
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 <[email protected]> */
82
83#ifdef USE_libC /* The define comes, when it comes, from hints/aix.pl. */
84# define LOAD loadAndInit
85# define UNLOAD terminateAndUnload
86# if defined(USE_vacpp_load_h)
87# include "/usr/vacpp/include/load.h"
88# elif defined(USE_ibmcxx_load_h)
89# include "/usr/ibmcxx/include/load.h"
90# elif defined(USE_xlC_load_h)
91# include "/usr/lpp/xlC/include/load.h"
92# elif defined(USE_load_h)
93# include "/usr/include/load.h"
94# endif
95#else
96# define LOAD load
97# define UNLOAD unload
98#endif
99
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
114#ifndef RTLD_LAZY
115# define RTLD_LAZY 0
116#endif
117#ifndef RTLD_GLOBAL
118# define RTLD_GLOBAL 0
119#endif
120
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
128typedef 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 */
136typedef 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
145typedef 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 */
163
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)
168
169static void caterr(char *);
170static int readExports(ModulePtr);
171static void *findMain(void);
172
173/* these statics are ok because they're constants */
174static char *strerror_failed = "(strerror failed)";
175static char *strerror_r_failed = "(strerror_r failed)";
176
177char *strerrorcat(char *str, int err) {
178 int strsiz = strlen(str);
179 int msgsiz;
180 char *msg;
181
182#ifdef USE_5005THREADS
183 char *buf = malloc(BUFSIZ);
184
185 if (buf == 0)
186 return 0;
187 if (strerror_r(err, buf, BUFSIZ) == 0)
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
196 dTHX;
197
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
205 return str;
206}
207
208char *strerrorcpy(char *str, int err) {
209 int msgsiz;
210 char *msg;
211
212#ifdef USE_5005THREADS
213 char *buf = malloc(BUFSIZ);
214
215 if (buf == 0)
216 return 0;
217 if (strerror_r(err, buf, BUFSIZ) == 0)
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
226 dTHX;
227
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
235 return str;
236}
237
238/* ARGSUSED */
239void *dlopen(char *path, int mode)
240{
241 dTHX;
242 dMY_CXT;
243 register ModulePtr mp;
244
245 /*
246 * Upon the first call register a terminate handler that will
247 * close all libraries.
248 */
249 if (dl_mainModule == NULL) {
250 if ((dl_mainModule = findMain()) == NULL)
251 return NULL;
252 }
253 /*
254 * Scan the list of modules if have the module already loaded.
255 */
256 for (mp = dl_modList; mp; mp = mp->next)
257 if (strcmp(mp->name, path) == 0) {
258 mp->refCnt++;
259 return mp;
260 }
261 Newxz(mp,1,Module);
262 if (mp == NULL) {
263 dl_errvalid++;
264 strcpy(dl_errbuf, "Newz: ");
265 strerrorcat(dl_errbuf, errno);
266 return NULL;
267 }
268
269 if ((mp->name = savepv(path)) == NULL) {
270 dl_errvalid++;
271 strcpy(dl_errbuf, "savepv: ");
272 strerrorcat(dl_errbuf, errno);
273 safefree(mp);
274 return NULL;
275 }
276
277 /*
278 * load should be declared load(const char *...). Thus we
279 * cast the path to a normal char *. Ugly.
280 */
281 if ((mp->entry = (void *)LOAD((char *)path,
282#ifdef L_LIBPATH_EXEC
283 L_LIBPATH_EXEC |
284#endif
285 L_NOAUTODEFER,
286 NULL)) == NULL) {
287 int saverrno = errno;
288
289 safefree(mp->name);
290 safefree(mp);
291 dl_errvalid++;
292 strcpy(dl_errbuf, "dlopen: ");
293 strcat(dl_errbuf, path);
294 strcat(dl_errbuf, ": ");
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 */
300 if (saverrno == ENOEXEC) {
301 char *moreinfo[BUFSIZ/sizeof(char *)];
302 if (loadquery(L_GETMESSAGES, moreinfo, sizeof(moreinfo)) == -1)
303 strerrorcpy(dl_errbuf, saverrno);
304 else {
305 char **p;
306 for (p = moreinfo; *p; p++)
307 caterr(*p);
308 }
309 } else
310 strerrorcat(dl_errbuf, saverrno);
311 return NULL;
312 }
313 mp->refCnt = 1;
314 mp->next = dl_modList;
315 dl_modList = mp;
316 /*
317 * Assume anonymous exports come from the module this dlopen
318 * is linked into, that holds true as long as dlopen and all
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.
323 */
324 if (loadbind(0, (void *)dlopen, mp->entry) == -1 ||
325 loadbind(0, dl_mainModule, mp->entry)) {
326 int saverrno = errno;
327
328 dlclose(mp);
329 dl_errvalid++;
330 strcpy(dl_errbuf, "loadbind: ");
331 strerrorcat(dl_errbuf, saverrno);
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 */
345static void caterr(char *s)
346{
347 dTHX;
348 dMY_CXT;
349 register char *p = s;
350
351 while (*p >= '0' && *p <= '9')
352 p++;
353 switch(atoi(s)) {
354 case L_ERROR_TOOMANY:
355 strcat(dl_errbuf, "too many errors");
356 break;
357 case L_ERROR_NOLIB:
358 strcat(dl_errbuf, "can't load library");
359 strcat(dl_errbuf, p);
360 break;
361 case L_ERROR_UNDEF:
362 strcat(dl_errbuf, "can't find symbol");
363 strcat(dl_errbuf, p);
364 break;
365 case L_ERROR_RLDBAD:
366 strcat(dl_errbuf, "bad RLD");
367 strcat(dl_errbuf, p);
368 break;
369 case L_ERROR_FORMAT:
370 strcat(dl_errbuf, "bad exec format in");
371 strcat(dl_errbuf, p);
372 break;
373 case L_ERROR_ERRNO:
374 strerrorcat(dl_errbuf, atoi(++p));
375 break;
376 default:
377 strcat(dl_errbuf, s);
378 break;
379 }
380}
381
382void *dlsym(void *handle, const char *symbol)
383{
384 dTHX;
385 dMY_CXT;
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;
397 dl_errvalid++;
398 strcpy(dl_errbuf, "dlsym: undefined symbol ");
399 strcat(dl_errbuf, symbol);
400 return NULL;
401}
402
403char *dlerror(void)
404{
405 dTHX;
406 dMY_CXT;
407 if (dl_errvalid) {
408 dl_errvalid = 0;
409 return dl_errbuf;
410 }
411 return NULL;
412}
413
414int dlclose(void *handle)
415{
416 dTHX;
417 dMY_CXT;
418 register ModulePtr mp = (ModulePtr)handle;
419 int result;
420 register ModulePtr mp1;
421
422 if (--mp->refCnt > 0)
423 return 0;
424 result = UNLOAD(mp->entry);
425 if (result == -1) {
426 dl_errvalid++;
427 strerrorcpy(dl_errbuf, errno);
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 }
437 if (mp == dl_modList)
438 dl_modList = mp->next;
439 else {
440 for (mp1 = dl_modList; mp1; mp1 = mp1->next)
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
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 */
457void *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 */
469static int readExports(ModulePtr mp)
470{
471 dTHX;
472 dMY_CXT;
473 LDFILE *ldp = NULL;
474 AIX_SCNHDR sh;
475 AIX_LDHDR *lhp;
476 char *ldbuf;
477 AIX_LDSYM *ls;
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) {
486 dl_errvalid++;
487 strcpy(dl_errbuf, "readExports: ");
488 strerrorcat(dl_errbuf, errno);
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) {
497 dl_errvalid++;
498 strcpy(dl_errbuf, "readExports: ");
499 strerrorcat(dl_errbuf, errno);
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) {
506 dl_errvalid++;
507 strcpy(dl_errbuf, "readExports: ");
508 strerrorcat(dl_errbuf, errno);
509 return -1;
510 }
511 }
512 if (i == -1) {
513 dl_errvalid++;
514 strcpy(dl_errbuf, "readExports: ");
515 strerrorcat(dl_errbuf, errno);
516 safefree(buf);
517 return -1;
518 }
519 /*
520 * Traverse the list of loaded modules. The entry point
521 * returned by LOAD() does actually point to the data
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) {
537 dl_errvalid++;
538 strcpy(dl_errbuf, "readExports: ");
539 strerrorcat(dl_errbuf, errno);
540 return -1;
541 }
542 }
543#ifdef USE_64_BIT_ALL
544 if (TYPE(ldp) != U803XTOCMAGIC) {
545#else
546 if (TYPE(ldp) != U802TOCMAGIC) {
547#endif
548 dl_errvalid++;
549 strcpy(dl_errbuf, "readExports: bad magic");
550 while(ldclose(ldp) == FAILURE)
551 ;
552 return -1;
553 }
554 if (ldnshread(ldp, _LOADER, &sh) != SUCCESS) {
555 dl_errvalid++;
556 strcpy(dl_errbuf, "readExports: cannot read loader section header");
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) {
566 dl_errvalid++;
567 strcpy(dl_errbuf, "readExports: ");
568 strerrorcat(dl_errbuf, errno);
569 while(ldclose(ldp) == FAILURE)
570 ;
571 return -1;
572 }
573 if (FSEEK(ldp, sh.s_scnptr, BEGINNING) != OKFSEEK) {
574 dl_errvalid++;
575 strcpy(dl_errbuf, "readExports: cannot seek to loader section");
576 safefree(ldbuf);
577 while(ldclose(ldp) == FAILURE)
578 ;
579 return -1;
580 }
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. */
583 if (FREAD(ldbuf, sh.s_size, 1, ldp) != 1) {
584 dl_errvalid++;
585 strcpy(dl_errbuf, "readExports: cannot read loader section");
586 safefree(ldbuf);
587 while(ldclose(ldp) == FAILURE)
588 ;
589 return -1;
590 }
591 lhp = (AIX_LDHDR *)ldbuf;
592 ls = (AIX_LDSYM *)(ldbuf+AIX_LDHDRSZ);
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 Newxz(mp->exports, mp->nExports, Export);
602 if (mp->exports == NULL) {
603 dl_errvalid++;
604 strcpy(dl_errbuf, "readExports: ");
605 strerrorcat(dl_errbuf, errno);
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;
616 ls = (AIX_LDSYM *)(ldbuf+AIX_LDHDRSZ);
617 for (i = lhp->l_nsyms; i; i--, ls++) {
618 char *symname;
619 if (!LDR_EXPORT(*ls))
620 continue;
621#ifndef USE_64_BIT_ALL
622 if (ls->l_zeroes == 0)
623#endif
624 symname = ls->l_offset+lhp->l_stoff+ldbuf;
625#ifndef USE_64_BIT_ALL
626 else
627 symname = ls->l_name;
628#endif
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
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 */
643static void * findMain(void)
644{
645 dTHX;
646 dMY_CXT;
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) {
654 dl_errvalid++;
655 strcpy(dl_errbuf, "findMain: ");
656 strerrorcat(dl_errbuf, errno);
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) {
663 dl_errvalid++;
664 strcpy(dl_errbuf, "findMain: ");
665 strerrorcat(dl_errbuf, errno);
666 return NULL;
667 }
668 }
669 if (i == -1) {
670 dl_errvalid++;
671 strcpy(dl_errbuf, "findMain: ");
672 strerrorcat(dl_errbuf, errno);
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}
686#endif /* USE_NATIVE_DLOPEN */
687
688/* dl_dlopen.xs
689 *
690 * Platform: SunOS/Solaris, possibly others which use dlopen.
691 * Author: Paul Marquess ([email protected])
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
709static void
710dl_private_init(pTHX)
711{
712 (void)dl_generic_private_init(aTHX);
713}
714
715MODULE = DynaLoader PACKAGE = DynaLoader
716
717BOOT:
718 (void)dl_private_init(aTHX);
719
720
721void *
722dl_load_file(filename, flags=0)
723 char * filename
724 int flags
725 CODE:
726 DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_load_file(%s,%x):\n", filename,flags));
727 if (flags & 0x01)
728 Perl_warn(aTHX_ "Can't make loaded symbols global on this platform while loading %s",filename);
729 RETVAL = dlopen(filename, RTLD_GLOBAL|RTLD_LAZY) ;
730 DLDEBUG(2,PerlIO_printf(Perl_debug_log, " libref=%x\n", RETVAL));
731 ST(0) = sv_newmortal() ;
732 if (RETVAL == NULL)
733 SaveError(aTHX_ "%s",dlerror()) ;
734 else
735 sv_setiv( ST(0), PTR2IV(RETVAL) );
736
737int
738dl_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
748
749void *
750dl_find_symbol(libhandle, symbolname)
751 void * libhandle
752 char * symbolname
753 CODE:
754 DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_find_symbol(handle=%x, symbol=%s)\n",
755 libhandle, symbolname));
756 RETVAL = dlsym(libhandle, symbolname);
757 DLDEBUG(2,PerlIO_printf(Perl_debug_log, " symbolref = %x\n", RETVAL));
758 ST(0) = sv_newmortal() ;
759 if (RETVAL == NULL)
760 SaveError(aTHX_ "%s",dlerror()) ;
761 else
762 sv_setiv( ST(0), PTR2IV(RETVAL));
763
764
765void
766dl_undef_symbols()
767 PPCODE:
768
769
770
771# These functions should not need changing on any platform:
772
773void
774dl_install_xsub(perl_name, symref, filename="$Package")
775 char * perl_name
776 void * symref
777 char * filename
778 CODE:
779 DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_install_xsub(name=%s, symref=%x)\n",
780 perl_name, symref));
781 ST(0) = sv_2mortal(newRV((SV*)newXS(perl_name,
782 (void(*)(pTHX_ CV *))symref,
783 filename)));
784
785
786char *
787dl_error()
788 CODE:
789 dMY_CXT;
790 RETVAL = dl_last_error ;
791 OUTPUT:
792 RETVAL
793
794# end.
Note: See TracBrowser for help on using the repository browser.