[p5sagit/p5-mst-13.2.git] / ext / DynaLoader / dl_aix.xs

/* dl_aix.xs
 *
 * Written: 8/31/94 by Wayne Scott (wscott@ichips.intel.com)
 *
 *  All I did was take Jens-Uwe Mager's libdl emulation library for
 *  AIX and merged it with the dl_dlopen.xs file to create a dynamic library
 *  package that works for AIX.
 *
 *  I did change all malloc's, free's, strdup's, calloc's to use the perl
 *  equilvant.  I also removed some stuff we will not need.  Call fini()
 *  on statup...   It can probably be trimmed more.
 */

#define PERLIO_NOT_STDIO 0

/*
 * On AIX 4.3 and above the emulation layer is not needed any more, and
 * indeed if perl uses its emulation and perl is linked into apache
 * which is supposed to use the native dlopen conflicts arise.
 * Jens-Uwe Mager jum@helios.de
 */
#ifdef USE_NATIVE_DLOPEN

#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#include <dlfcn.h>

#else

/*
 * @(#)dlfcn.c	1.5 revision of 93/02/14  20:14:17
 * This is an unpublished work copyright (c) 1992 Helios Software GmbH
 * 3000 Hannover 1, Germany
 */
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

/* When building as a 64-bit binary on AIX, define this to get the
 * correct structure definitions.  Also determines the field-name
 * macros and gates some logic in readEntries().  -- Steven N. Hirsch
 * <hirschs@btv.ibm.com> */
#ifdef USE_64_BIT_ALL
#   define __XCOFF64__
#   define __XCOFF32__
#endif

#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/ldr.h>
#include <a.out.h>
#undef FREAD
#undef FWRITE
#include <ldfcn.h>

#ifdef USE_64_BIT_ALL
#   define AIX_SCNHDR SCNHDR_64
#   define AIX_LDHDR LDHDR_64
#   define AIX_LDSYM LDSYM_64
#   define AIX_LDHDRSZ LDHDRSZ_64
#else
#   define AIX_SCNHDR SCNHDR
#   define AIX_LDHDR LDHDR
#   define AIX_LDSYM LDSYM
#   define AIX_LDHDRSZ LDHDRSZ
#endif

/* When using Perl extensions written in C++ the longer versions
 * of load() and unload() from libC and libC_r need to be used,
 * otherwise statics in the extensions won't get initialized right.
 * -- Stephanie Beals <bealzy@us.ibm.com> */

/* Older AIX C compilers cannot deal with C++ double-slash comments in
   the ibmcxx and/or xlC includes.  Since we only need a single file,
   be more fine-grained about what's included <hirschs@btv.ibm.com> */

#ifdef USE_libC /* The define comes, when it comes, from hints/aix.pl. */
#   define LOAD   loadAndInit
#   define UNLOAD terminateAndUnload
#   if defined(USE_vacpp_load_h)
#       include "/usr/vacpp/include/load.h"
#   elif defined(USE_ibmcxx_load_h)
#       include "/usr/ibmcxx/include/load.h"
#   elif defined(USE_xlC_load_h)
#       include "/usr/lpp/xlC/include/load.h"
#   elif defined(USE_load_h)
#       include "/usr/include/load.h"
#   endif
#else
#   define LOAD   load
#   define UNLOAD unload
#endif

/*
 * AIX 4.3 does remove some useful definitions from ldfcn.h. Define
 * these here to compensate for that lossage.
 */
#ifndef BEGINNING
# define BEGINNING SEEK_SET
#endif
#ifndef FSEEK
# define FSEEK(ldptr,o,p)	fseek(IOPTR(ldptr),(p==BEGINNING)?(OFFSET(ldptr) +o):o,p)
#endif
#ifndef FREAD
# define FREAD(p,s,n,ldptr)	fread(p,s,n,IOPTR(ldptr))
#endif

#ifndef RTLD_LAZY
# define RTLD_LAZY 0
#endif
#ifndef RTLD_GLOBAL
# define RTLD_GLOBAL 0
#endif

/*
 * We simulate dlopen() et al. through a call to load. Because AIX has
 * no call to find an exported symbol we read the loader section of the
 * loaded module and build a list of exported symbols and their virtual
 * address.
 */

typedef struct {
	char		*name;		/* the symbols's name */
	void		*addr;		/* its relocated virtual address */
} Export, *ExportPtr;

/*
 * The void * handle returned from dlopen is actually a ModulePtr.
 */
typedef struct Module {
	struct Module	*next;
	char		*name;		/* module name for refcounting */
	int		refCnt;		/* the number of references */
	void		*entry;		/* entry point from load */
	int		nExports;	/* the number of exports found */
	ExportPtr	exports;	/* the array of exports */
} Module, *ModulePtr;

/*
 * We keep a list of all loaded modules to be able to reference count
 * duplicate dlopen's.
 */
static ModulePtr modList;		/* XXX threaded */

/*
 * The last error from one of the dl* routines is kept in static
 * variables here. Each error is returned only once to the caller.
 */
static char errbuf[BUFSIZ];		/* XXX threaded */
static int errvalid;			/* XXX threaded */

static void caterr(char *);
static int readExports(ModulePtr);
static void *findMain(void);

static char *strerror_failed   = "(strerror failed)";
static char *strerror_r_failed = "(strerror_r failed)";

char *strerrorcat(char *str, int err) {
    int strsiz = strlen(str);
    int msgsiz;
    char *msg;

#ifdef USE_THREADS
    char *buf = malloc(BUFSIZ);

    if (buf == 0)
      return 0;
    if (strerror_r(err, buf, BUFSIZ) == 0)
      msg = buf;
    else
      msg = strerror_r_failed;
    msgsiz = strlen(msg);
    if (strsiz + msgsiz < BUFSIZ)
      strcat(str, msg);
    free(buf);
#else
    if ((msg = strerror(err)) == 0)
      msg = strerror_failed;
    msgsiz = strlen(msg);		/* Note msg = buf and free() above. */
    if (strsiz + msgsiz < BUFSIZ)	/* Do not move this after #endif. */
      strcat(str, msg);
#endif

    return str;
}

char *strerrorcpy(char *str, int err) {
    int msgsiz;
    char *msg;

#ifdef USE_THREADS
    char *buf = malloc(BUFSIZ);

    if (buf == 0)
      return 0;
    if (strerror_r(err, buf, BUFSIZ) == 0)
      msg = buf;
    else
      msg = strerror_r_failed;
    msgsiz = strlen(msg);
    if (msgsiz < BUFSIZ)
      strcpy(str, msg);
    free(buf);
#else
    if ((msg = strerror(err)) == 0)
      msg = strerror_failed;
    msgsiz = strlen(msg);	/* Note msg = buf and free() above. */
    if (msgsiz < BUFSIZ)	/* Do not move this after #endif. */
      strcpy(str, msg);
#endif

    return str;
}
  
/* ARGSUSED */
void *dlopen(char *path, int mode)
{
	dTHX;
	register ModulePtr mp;
	static void *mainModule;		/* XXX threaded */

	/*
	 * Upon the first call register a terminate handler that will
	 * close all libraries.
	 */
	if (mainModule == NULL) {
		if ((mainModule = findMain()) == NULL)
			return NULL;
	}
	/*
	 * Scan the list of modules if have the module already loaded.
	 */
	for (mp = modList; mp; mp = mp->next)
		if (strcmp(mp->name, path) == 0) {
			mp->refCnt++;
			return mp;
		}
	Newz(1000,mp,1,Module);
	if (mp == NULL) {
		errvalid++;
		strcpy(errbuf, "Newz: ");
		strerrorcat(errbuf, errno);
		return NULL;
	}
	
	if ((mp->name = savepv(path)) == NULL) {
		errvalid++;
		strcpy(errbuf, "savepv: ");
		strerrorcat(errbuf, errno);
		safefree(mp);
		return NULL;
	}

	/*
	 * load should be declared load(const char *...). Thus we
	 * cast the path to a normal char *. Ugly.
	 */
	if ((mp->entry = (void *)LOAD((char *)path,
#ifdef L_LIBPATH_EXEC
				      L_LIBPATH_EXEC |
#endif
				      L_NOAUTODEFER,
				      NULL)) == NULL) {
	        int saverrno = errno;
		
		safefree(mp->name);
		safefree(mp);
		errvalid++;
		strcpy(errbuf, "dlopen: ");
		strcat(errbuf, path);
		strcat(errbuf, ": ");
		/*
		 * If AIX says the file is not executable, the error
		 * can be further described by querying the loader about
		 * the last error.
		 */
		if (saverrno == ENOEXEC) {
			char *moreinfo[BUFSIZ/sizeof(char *)];
			if (loadquery(L_GETMESSAGES, moreinfo, sizeof(moreinfo)) == -1)
				strerrorcpy(errbuf, saverrno);
			else {
				char **p;
				for (p = moreinfo; *p; p++)
					caterr(*p);
			}
		} else
			strerrorcat(errbuf, saverrno);
		return NULL;
	}
	mp->refCnt = 1;
	mp->next = modList;
	modList = mp;
	/*
	 * Assume anonymous exports come from the module this dlopen
	 * is linked into, that holds true as long as dlopen and all
	 * of the perl core are in the same shared object. Also bind
	 * against the main part, in the case a perl is not the main
	 * part, e.g mod_perl as DSO in Apache so perl modules can
	 * also reference Apache symbols.
	 */
	if (loadbind(0, (void *)dlopen, mp->entry) == -1 ||
	    loadbind(0, mainModule, mp->entry)) {
	        int saverrno = errno;

		dlclose(mp);
		errvalid++;
		strcpy(errbuf, "loadbind: ");
		strerrorcat(errbuf, saverrno);
		return NULL;
	}
	if (readExports(mp) == -1) {
		dlclose(mp);
		return NULL;
	}
	return mp;
}

/*
 * Attempt to decipher an AIX loader error message and append it
 * to our static error message buffer.
 */
static void caterr(char *s)
{
	register char *p = s;

	while (*p >= '0' && *p <= '9')
		p++;
	switch(atoi(s)) {
	case L_ERROR_TOOMANY:
		strcat(errbuf, "too many errors");
		break;
	case L_ERROR_NOLIB:
		strcat(errbuf, "can't load library");
		strcat(errbuf, p);
		break;
	case L_ERROR_UNDEF:
		strcat(errbuf, "can't find symbol");
		strcat(errbuf, p);
		break;
	case L_ERROR_RLDBAD:
		strcat(errbuf, "bad RLD");
		strcat(errbuf, p);
		break;
	case L_ERROR_FORMAT:
		strcat(errbuf, "bad exec format in");
		strcat(errbuf, p);
		break;
	case L_ERROR_ERRNO:
		strerrorcat(errbuf, atoi(++p));
		break;
	default:
		strcat(errbuf, s);
		break;
	}
}

void *dlsym(void *handle, const char *symbol)
{
	register ModulePtr mp = (ModulePtr)handle;
	register ExportPtr ep;
	register int i;

	/*
	 * Could speed up search, but I assume that one assigns
	 * the result to function pointers anyways.
	 */
	for (ep = mp->exports, i = mp->nExports; i; i--, ep++)
		if (strcmp(ep->name, symbol) == 0)
			return ep->addr;
	errvalid++;
	strcpy(errbuf, "dlsym: undefined symbol ");
	strcat(errbuf, symbol);
	return NULL;
}

char *dlerror(void)
{
	if (errvalid) {
		errvalid = 0;
		return errbuf;
	}
	return NULL;
}

int dlclose(void *handle)
{
	register ModulePtr mp = (ModulePtr)handle;
	int result;
	register ModulePtr mp1;

	if (--mp->refCnt > 0)
		return 0;
	result = UNLOAD(mp->entry);
	if (result == -1) {
		errvalid++;
		strerrorcpy(errbuf, errno);
	}
	if (mp->exports) {
		register ExportPtr ep;
		register int i;
		for (ep = mp->exports, i = mp->nExports; i; i--, ep++)
			if (ep->name)
				safefree(ep->name);
		safefree(mp->exports);
	}
	if (mp == modList)
		modList = mp->next;
	else {
		for (mp1 = modList; mp1; mp1 = mp1->next)
			if (mp1->next == mp) {
				mp1->next = mp->next;
				break;
			}
	}
	safefree(mp->name);
	safefree(mp);
	return result;
}

/* Added by Wayne Scott 
 * This is needed because the ldopen system call calls
 * calloc to allocated a block of date.  The ldclose call calls free.
 * Without this we get this system calloc and perl's free, resulting
 * in a "Bad free" message.  This way we always use perl's malloc.
 */
void *calloc(size_t ne, size_t sz) 
{
  void *out;

  out = (void *) safemalloc(ne*sz);
  memzero(out, ne*sz);
  return(out);
}
 
/*
 * Build the export table from the XCOFF .loader section.
 */
static int readExports(ModulePtr mp)
{
	dTHX;
	LDFILE *ldp = NULL;
	AIX_SCNHDR sh;
	AIX_LDHDR *lhp;
	char *ldbuf;
	AIX_LDSYM *ls;
	int i;
	ExportPtr ep;

	if ((ldp = ldopen(mp->name, ldp)) == NULL) {
		struct ld_info *lp;
		char *buf;
		int size = 4*1024;
		if (errno != ENOENT) {
			errvalid++;
			strcpy(errbuf, "readExports: ");
			strerrorcat(errbuf, errno);
			return -1;
		}
		/*
		 * The module might be loaded due to the LIBPATH
		 * environment variable. Search for the loaded
		 * module using L_GETINFO.
		 */
		if ((buf = safemalloc(size)) == NULL) {
			errvalid++;
			strcpy(errbuf, "readExports: ");
			strerrorcat(errbuf, errno);
			return -1;
		}
		while ((i = loadquery(L_GETINFO, buf, size)) == -1 && errno == ENOMEM) {
			safefree(buf);
			size += 4*1024;
			if ((buf = safemalloc(size)) == NULL) {
				errvalid++;
				strcpy(errbuf, "readExports: ");
				strerrorcat(errbuf, errno);
				return -1;
			}
		}
		if (i == -1) {
			errvalid++;
			strcpy(errbuf, "readExports: ");
			strerrorcat(errbuf, errno);
			safefree(buf);
			return -1;
		}
		/*
		 * Traverse the list of loaded modules. The entry point
		 * returned by LOAD() does actually point to the data
		 * segment origin.
		 */
		lp = (struct ld_info *)buf;
		while (lp) {
			if (lp->ldinfo_dataorg == mp->entry) {
				ldp = ldopen(lp->ldinfo_filename, ldp);
				break;
			}
			if (lp->ldinfo_next == 0)
				lp = NULL;
			else
				lp = (struct ld_info *)((char *)lp + lp->ldinfo_next);
		}
		safefree(buf);
		if (!ldp) {
			errvalid++;
			strcpy(errbuf, "readExports: ");
			strerrorcat(errbuf, errno);
			return -1;
		}
	}
#ifdef USE_64_BIT_ALL
	if (TYPE(ldp) != U803XTOCMAGIC) {
#else
	if (TYPE(ldp) != U802TOCMAGIC) {
#endif
		errvalid++;
		strcpy(errbuf, "readExports: bad magic");
		while(ldclose(ldp) == FAILURE)
			;
		return -1;
	}
	if (ldnshread(ldp, _LOADER, &sh) != SUCCESS) {
		errvalid++;
		strcpy(errbuf, "readExports: cannot read loader section header");
		while(ldclose(ldp) == FAILURE)
			;
		return -1;
	}
	/*
	 * We read the complete loader section in one chunk, this makes
	 * finding long symbol names residing in the string table easier.
	 */
	if ((ldbuf = (char *)safemalloc(sh.s_size)) == NULL) {
		errvalid++;
		strcpy(errbuf, "readExports: ");
		strerrorcat(errbuf, errno);
		while(ldclose(ldp) == FAILURE)
			;
		return -1;
	}
	if (FSEEK(ldp, sh.s_scnptr, BEGINNING) != OKFSEEK) {
		errvalid++;
		strcpy(errbuf, "readExports: cannot seek to loader section");
		safefree(ldbuf);
		while(ldclose(ldp) == FAILURE)
			;
		return -1;
	}
/* This first case is a hack, since it assumes that the 3rd parameter to
   FREAD is 1. See the redefinition of FREAD above to see how this works. */
	if (FREAD(ldbuf, sh.s_size, 1, ldp) != 1) {
		errvalid++;
		strcpy(errbuf, "readExports: cannot read loader section");
		safefree(ldbuf);
		while(ldclose(ldp) == FAILURE)
			;
		return -1;
	}
	lhp = (AIX_LDHDR *)ldbuf;
	ls = (AIX_LDSYM *)(ldbuf+AIX_LDHDRSZ);
	/*
	 * Count the number of exports to include in our export table.
	 */
	for (i = lhp->l_nsyms; i; i--, ls++) {
		if (!LDR_EXPORT(*ls))
			continue;
		mp->nExports++;
	}
	Newz(1001, mp->exports, mp->nExports, Export);
	if (mp->exports == NULL) {
		errvalid++;
		strcpy(errbuf, "readExports: ");
		strerrorcat(errbuf, errno);
		safefree(ldbuf);
		while(ldclose(ldp) == FAILURE)
			;
		return -1;
	}
	/*
	 * Fill in the export table. All entries are relative to
	 * the entry point we got from load.
	 */
	ep = mp->exports;
	ls = (AIX_LDSYM *)(ldbuf+AIX_LDHDRSZ);
	for (i = lhp->l_nsyms; i; i--, ls++) {
		char *symname;
		if (!LDR_EXPORT(*ls))
			continue;
#ifndef USE_64_BIT_ALL
		if (ls->l_zeroes == 0)
#endif
			symname = ls->l_offset+lhp->l_stoff+ldbuf;
#ifndef USE_64_BIT_ALL
		else
			symname = ls->l_name;
#endif
		ep->name = savepv(symname);
		ep->addr = (void *)((unsigned long)mp->entry + ls->l_value);
		ep++;
	}
	safefree(ldbuf);
	while(ldclose(ldp) == FAILURE)
		;
	return 0;
}

/*
 * Find the main modules entry point. This is used as export pointer
 * for loadbind() to be able to resolve references to the main part.
 */
static void * findMain(void)
{
	struct ld_info *lp;
	char *buf;
	int size = 4*1024;
	int i;
	void *ret;

	if ((buf = safemalloc(size)) == NULL) {
		errvalid++;
		strcpy(errbuf, "findMain: ");
		strerrorcat(errbuf, errno);
		return NULL;
	}
	while ((i = loadquery(L_GETINFO, buf, size)) == -1 && errno == ENOMEM) {
		safefree(buf);
		size += 4*1024;
		if ((buf = safemalloc(size)) == NULL) {
			errvalid++;
			strcpy(errbuf, "findMain: ");
			strerrorcat(errbuf, errno);
			return NULL;
		}
	}
	if (i == -1) {
		errvalid++;
		strcpy(errbuf, "findMain: ");
		strerrorcat(errbuf, errno);
		safefree(buf);
		return NULL;
	}
	/*
	 * The first entry is the main module. The entry point
	 * returned by load() does actually point to the data
	 * segment origin.
	 */
	lp = (struct ld_info *)buf;
	ret = lp->ldinfo_dataorg;
	safefree(buf);
	return ret;
}
#endif /* USE_NATIVE_DLOPEN */

/* dl_dlopen.xs
 * 
 * Platform:	SunOS/Solaris, possibly others which use dlopen.
 * Author:	Paul Marquess (Paul.Marquess@btinternet.com)
 * Created:	10th July 1994
 *
 * Modified:
 * 15th July 1994   - Added code to explicitly save any error messages.
 * 3rd August 1994  - Upgraded to v3 spec.
 * 9th August 1994  - Changed to use IV
 * 10th August 1994 - Tim Bunce: Added RTLD_LAZY, switchable debugging,
 *                    basic FreeBSD support, removed ClearError
 *
 */

/* Porting notes:

	see dl_dlopen.xs

*/

#include "dlutils.c"	/* SaveError() etc	*/


static void
dl_private_init(pTHX)
{
    (void)dl_generic_private_init(aTHX);
}
 
MODULE = DynaLoader     PACKAGE = DynaLoader

BOOT:
    (void)dl_private_init(aTHX);


void *
dl_load_file(filename, flags=0)
	char *	filename
	int	flags
	CODE:
	DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_load_file(%s,%x):\n", filename,flags));
	if (flags & 0x01)
	    Perl_warn(aTHX_ "Can't make loaded symbols global on this platform while loading %s",filename);
	RETVAL = dlopen(filename, RTLD_GLOBAL|RTLD_LAZY) ;
	DLDEBUG(2,PerlIO_printf(Perl_debug_log, " libref=%x\n", RETVAL));
	ST(0) = sv_newmortal() ;
	if (RETVAL == NULL)
	    SaveError(aTHX_ "%s",dlerror()) ;
	else
	    sv_setiv( ST(0), PTR2IV(RETVAL) );

int
dl_unload_file(libref)
    void *	libref
  CODE:
    DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_unload_file(%lx):\n", libref));
    RETVAL = (dlclose(libref) == 0 ? 1 : 0);
    if (!RETVAL)
        SaveError(aTHX_ "%s", dlerror()) ;
    DLDEBUG(2,PerlIO_printf(Perl_debug_log, " retval = %d\n", RETVAL));
  OUTPUT:
    RETVAL

void *
dl_find_symbol(libhandle, symbolname)
	void *		libhandle
	char *		symbolname
	CODE:
	DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_find_symbol(handle=%x, symbol=%s)\n",
		libhandle, symbolname));
	RETVAL = dlsym(libhandle, symbolname);
	DLDEBUG(2,PerlIO_printf(Perl_debug_log, "  symbolref = %x\n", RETVAL));
	ST(0) = sv_newmortal() ;
	if (RETVAL == NULL)
	    SaveError(aTHX_ "%s",dlerror()) ;
	else
	    sv_setiv( ST(0), PTR2IV(RETVAL));


void
dl_undef_symbols()
	PPCODE:


# These functions should not need changing on any platform:

void
dl_install_xsub(perl_name, symref, filename="$Package")
    char *	perl_name
    void *	symref 
    char *	filename
    CODE:
    DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_install_xsub(name=%s, symref=%x)\n",
	perl_name, symref));
    ST(0) = sv_2mortal(newRV((SV*)newXS(perl_name,
					(void(*)(pTHX_ CV *))symref,
					filename)));


char *
dl_error()
    CODE:
    RETVAL = LastError ;
    OUTPUT:
    RETVAL

# end.
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
077440d8	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
	29	#else
	30
	31	/*
a0d0e21e	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	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	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	56	#undef FREAD
7ca86468	57	#undef FWRITE
a0d0e21e	58	#include <ldfcn.h>
a0d0e21e	59
19e194ad	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	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	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	81	#ifdef USE_libC /* The define comes, when it comes, from hints/aix.pl. */
c88be79f	82	# define LOAD loadAndInit
4e774c84	83	# define UNLOAD terminateAndUnload
3a7209f1	84	# if defined(USE_vacpp_load_h)
3a7209f1	85	# include "/usr/vacpp/include/load.h"
bab3591f	86	# elif defined(USE_ibmcxx_load_h)
bab3591f	87	# include "/usr/ibmcxx/include/load.h"
3a7209f1	88	# elif defined(USE_xlC_load_h)
3a7209f1	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	93	#else
	94	# define LOAD load
	95	# define UNLOAD unload
	96	#endif
	97
ee580363	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	112	#ifndef RTLD_LAZY
	113	# define RTLD_LAZY 0
	114	#endif
	115	#ifndef RTLD_GLOBAL
	116	# define RTLD_GLOBAL 0
	117	#endif
	118
a0d0e21e	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
	143	/*
7ca86468	144	* We keep a list of all loaded modules to be able to reference count
7ca86468	145	* duplicate dlopen's.
a0d0e21e	146	*/
549a6b10	147	static ModulePtr modList; /* XXX threaded */
a0d0e21e	148
	149	/*
	150	* The last error from one of the dl* routines is kept in static
	151	* variables here. Each error is returned only once to the caller.
	152	*/
549a6b10	153	static char errbuf[BUFSIZ]; /* XXX threaded */
549a6b10	154	static int errvalid; /* XXX threaded */
a0d0e21e	155
	156	static void caterr(char *);
	157	static int readExports(ModulePtr);
7ca86468	158	static void *findMain(void);
a0d0e21e	159
ce637636	160	static char *strerror_failed = "(strerror failed)";
	161	static char *strerror_r_failed = "(strerror_r failed)";
	162
fd206186	163	char strerrorcat(char str, int err) {
ce637636	164	int strsiz = strlen(str);
	165	int msgsiz;
	166	char *msg;
	167
	168	#ifdef USE_THREADS
	169	char *buf = malloc(BUFSIZ);
	170
	171	if (buf == 0)
	172	return 0;
549a6b10	173	if (strerror_r(err, buf, BUFSIZ) == 0)
ce637636	174	msg = buf;
	175	else
	176	msg = strerror_r_failed;
	177	msgsiz = strlen(msg);
	178	if (strsiz + msgsiz < BUFSIZ)
	179	strcat(str, msg);
	180	free(buf);
	181	#else
	182	if ((msg = strerror(err)) == 0)
	183	msg = strerror_failed;
	184	msgsiz = strlen(msg); /* Note msg = buf and free() above. */
	185	if (strsiz + msgsiz < BUFSIZ) /* Do not move this after #endif. */
	186	strcat(str, msg);
	187	#endif
	188
fd206186	189	return str;
fd206186	190	}
ce637636	191
fd206186	192	char strerrorcpy(char str, int err) {
ce637636	193	int msgsiz;
	194	char *msg;
	195
	196	#ifdef USE_THREADS
	197	char *buf = malloc(BUFSIZ);
	198
	199	if (buf == 0)
	200	return 0;
549a6b10	201	if (strerror_r(err, buf, BUFSIZ) == 0)
ce637636	202	msg = buf;
	203	else
	204	msg = strerror_r_failed;
	205	msgsiz = strlen(msg);
	206	if (msgsiz < BUFSIZ)
	207	strcpy(str, msg);
	208	free(buf);
	209	#else
	210	if ((msg = strerror(err)) == 0)
	211	msg = strerror_failed;
	212	msgsiz = strlen(msg); /* Note msg = buf and free() above. */
	213	if (msgsiz < BUFSIZ) /* Do not move this after #endif. */
	214	strcpy(str, msg);
	215	#endif
	216
fd206186	217	return str;
fd206186	218	}
a0d0e21e	219
	220	/* ARGSUSED */
	221	void dlopen(char path, int mode)
	222	{
5b877257	223	dTHX;
a0d0e21e	224	register ModulePtr mp;
7ca86468	225	static void mainModule; / XXX threaded */
a0d0e21e	226
	227	/*
	228	* Upon the first call register a terminate handler that will
f6b3007c	229	* close all libraries.
a0d0e21e	230	*/
7ca86468	231	if (mainModule == NULL) {
	232	if ((mainModule = findMain()) == NULL)
	233	return NULL;
a0d0e21e	234	}
	235	/*
	236	* Scan the list of modules if have the module already loaded.
	237	*/
	238	for (mp = modList; mp; mp = mp->next)
	239	if (strcmp(mp->name, path) == 0) {
	240	mp->refCnt++;
	241	return mp;
	242	}
	243	Newz(1000,mp,1,Module);
	244	if (mp == NULL) {
	245	errvalid++;
	246	strcpy(errbuf, "Newz: ");
fd206186	247	strerrorcat(errbuf, errno);
a0d0e21e	248	return NULL;
	249	}
	250
	251	if ((mp->name = savepv(path)) == NULL) {
	252	errvalid++;
	253	strcpy(errbuf, "savepv: ");
fd206186	254	strerrorcat(errbuf, errno);
a0d0e21e	255	safefree(mp);
	256	return NULL;
	257	}
549a6b10	258
a0d0e21e	259	/*
	260	* load should be declared load(const char *...). Thus we
	261	* cast the path to a normal char *. Ugly.
	262	*/
4e774c84	263	if ((mp->entry = (void )LOAD((char )path,
549a6b10	264	#ifdef L_LIBPATH_EXEC
	265	L_LIBPATH_EXEC \|
	266	#endif
	267	L_NOAUTODEFER,
	268	NULL)) == NULL) {
	269	int saverrno = errno;
	270
a0d0e21e	271	safefree(mp->name);
	272	safefree(mp);
	273	errvalid++;
	274	strcpy(errbuf, "dlopen: ");
	275	strcat(errbuf, path);
	276	strcat(errbuf, ": ");
	277	/*
	278	* If AIX says the file is not executable, the error
	279	* can be further described by querying the loader about
	280	* the last error.
	281	*/
549a6b10	282	if (saverrno == ENOEXEC) {
	283	char moreinfo[BUFSIZ/sizeof(char )];
	284	if (loadquery(L_GETMESSAGES, moreinfo, sizeof(moreinfo)) == -1)
	285	strerrorcpy(errbuf, saverrno);
a0d0e21e	286	else {
a0d0e21e	287	char **p;
549a6b10	288	for (p = moreinfo; *p; p++)
a0d0e21e	289	caterr(*p);
	290	}
	291	} else
549a6b10	292	strerrorcat(errbuf, saverrno);
a0d0e21e	293	return NULL;
	294	}
	295	mp->refCnt = 1;
	296	mp->next = modList;
	297	modList = mp;
f6b3007c	298	/*
	299	* Assume anonymous exports come from the module this dlopen
	300	* is linked into, that holds true as long as dlopen and all
7ca86468	301	* of the perl core are in the same shared object. Also bind
	302	* against the main part, in the case a perl is not the main
	303	* part, e.g mod_perl as DSO in Apache so perl modules can
	304	* also reference Apache symbols.
f6b3007c	305	*/
7ca86468	306	if (loadbind(0, (void *)dlopen, mp->entry) == -1 \|\|
7ca86468	307	loadbind(0, mainModule, mp->entry)) {
549a6b10	308	int saverrno = errno;
549a6b10	309
a0d0e21e	310	dlclose(mp);
	311	errvalid++;
	312	strcpy(errbuf, "loadbind: ");
549a6b10	313	strerrorcat(errbuf, saverrno);
a0d0e21e	314	return NULL;
	315	}
	316	if (readExports(mp) == -1) {
	317	dlclose(mp);
	318	return NULL;
	319	}
	320	return mp;
	321	}
	322
	323	/*
	324	* Attempt to decipher an AIX loader error message and append it
	325	* to our static error message buffer.
	326	*/
	327	static void caterr(char *s)
	328	{
	329	register char *p = s;
	330
	331	while (p >= '0' && p <= '9')
	332	p++;
	333	switch(atoi(s)) {
	334	case L_ERROR_TOOMANY:
42eb1a87	335	strcat(errbuf, "too many errors");
a0d0e21e	336	break;
	337	case L_ERROR_NOLIB:
	338	strcat(errbuf, "can't load library");
	339	strcat(errbuf, p);
	340	break;
	341	case L_ERROR_UNDEF:
	342	strcat(errbuf, "can't find symbol");
	343	strcat(errbuf, p);
	344	break;
	345	case L_ERROR_RLDBAD:
	346	strcat(errbuf, "bad RLD");
	347	strcat(errbuf, p);
	348	break;
	349	case L_ERROR_FORMAT:
	350	strcat(errbuf, "bad exec format in");
	351	strcat(errbuf, p);
	352	break;
	353	case L_ERROR_ERRNO:
fd206186	354	strerrorcat(errbuf, atoi(++p));
a0d0e21e	355	break;
	356	default:
	357	strcat(errbuf, s);
	358	break;
	359	}
	360	}
	361
	362	void dlsym(void handle, const char *symbol)
	363	{
	364	register ModulePtr mp = (ModulePtr)handle;
	365	register ExportPtr ep;
	366	register int i;
	367
	368	/*
	369	* Could speed up search, but I assume that one assigns
	370	* the result to function pointers anyways.
	371	*/
	372	for (ep = mp->exports, i = mp->nExports; i; i--, ep++)
	373	if (strcmp(ep->name, symbol) == 0)
	374	return ep->addr;
	375	errvalid++;
	376	strcpy(errbuf, "dlsym: undefined symbol ");
	377	strcat(errbuf, symbol);
	378	return NULL;
	379	}
	380
	381	char *dlerror(void)
	382	{
	383	if (errvalid) {
	384	errvalid = 0;
	385	return errbuf;
	386	}
	387	return NULL;
	388	}
	389
	390	int dlclose(void *handle)
	391	{
	392	register ModulePtr mp = (ModulePtr)handle;
	393	int result;
	394	register ModulePtr mp1;
	395
	396	if (--mp->refCnt > 0)
	397	return 0;
4e774c84	398	result = UNLOAD(mp->entry);
a0d0e21e	399	if (result == -1) {
a0d0e21e	400	errvalid++;
fd206186	401	strerrorcpy(errbuf, errno);
a0d0e21e	402	}
	403	if (mp->exports) {
	404	register ExportPtr ep;
	405	register int i;
	406	for (ep = mp->exports, i = mp->nExports; i; i--, ep++)
	407	if (ep->name)
	408	safefree(ep->name);
	409	safefree(mp->exports);
	410	}
	411	if (mp == modList)
	412	modList = mp->next;
	413	else {
	414	for (mp1 = modList; mp1; mp1 = mp1->next)
	415	if (mp1->next == mp) {
	416	mp1->next = mp->next;
	417	break;
	418	}
	419	}
	420	safefree(mp->name);
	421	safefree(mp);
	422	return result;
	423	}
	424
a0d0e21e	425	/* Added by Wayne Scott
	426	* This is needed because the ldopen system call calls
	427	* calloc to allocated a block of date. The ldclose call calls free.
	428	* Without this we get this system calloc and perl's free, resulting
	429	* in a "Bad free" message. This way we always use perl's malloc.
	430	*/
	431	void *calloc(size_t ne, size_t sz)
	432	{
	433	void *out;
	434
	435	out = (void ) safemalloc(nesz);
	436	memzero(out, ne*sz);
	437	return(out);
	438	}
	439
	440	/*
	441	* Build the export table from the XCOFF .loader section.
	442	*/
	443	static int readExports(ModulePtr mp)
	444	{
5b877257	445	dTHX;
a0d0e21e	446	LDFILE *ldp = NULL;
19e194ad	447	AIX_SCNHDR sh;
19e194ad	448	AIX_LDHDR *lhp;
a0d0e21e	449	char *ldbuf;
19e194ad	450	AIX_LDSYM *ls;
a0d0e21e	451	int i;
	452	ExportPtr ep;
	453
	454	if ((ldp = ldopen(mp->name, ldp)) == NULL) {
	455	struct ld_info *lp;
	456	char *buf;
	457	int size = 4*1024;
	458	if (errno != ENOENT) {
	459	errvalid++;
	460	strcpy(errbuf, "readExports: ");
fd206186	461	strerrorcat(errbuf, errno);
a0d0e21e	462	return -1;
	463	}
	464	/*
	465	* The module might be loaded due to the LIBPATH
	466	* environment variable. Search for the loaded
	467	* module using L_GETINFO.
	468	*/
	469	if ((buf = safemalloc(size)) == NULL) {
	470	errvalid++;
	471	strcpy(errbuf, "readExports: ");
fd206186	472	strerrorcat(errbuf, errno);
a0d0e21e	473	return -1;
	474	}
	475	while ((i = loadquery(L_GETINFO, buf, size)) == -1 && errno == ENOMEM) {
	476	safefree(buf);
	477	size += 4*1024;
	478	if ((buf = safemalloc(size)) == NULL) {
	479	errvalid++;
	480	strcpy(errbuf, "readExports: ");
fd206186	481	strerrorcat(errbuf, errno);
a0d0e21e	482	return -1;
	483	}
	484	}
	485	if (i == -1) {
	486	errvalid++;
	487	strcpy(errbuf, "readExports: ");
fd206186	488	strerrorcat(errbuf, errno);
a0d0e21e	489	safefree(buf);
	490	return -1;
	491	}
	492	/*
	493	* Traverse the list of loaded modules. The entry point
4e774c84	494	* returned by LOAD() does actually point to the data
a0d0e21e	495	* segment origin.
	496	*/
	497	lp = (struct ld_info *)buf;
	498	while (lp) {
	499	if (lp->ldinfo_dataorg == mp->entry) {
	500	ldp = ldopen(lp->ldinfo_filename, ldp);
	501	break;
	502	}
	503	if (lp->ldinfo_next == 0)
	504	lp = NULL;
	505	else
	506	lp = (struct ld_info )((char )lp + lp->ldinfo_next);
	507	}
	508	safefree(buf);
	509	if (!ldp) {
	510	errvalid++;
	511	strcpy(errbuf, "readExports: ");
fd206186	512	strerrorcat(errbuf, errno);
a0d0e21e	513	return -1;
	514	}
	515	}
19e194ad	516	#ifdef USE_64_BIT_ALL
	517	if (TYPE(ldp) != U803XTOCMAGIC) {
	518	#else
a0d0e21e	519	if (TYPE(ldp) != U802TOCMAGIC) {
19e194ad	520	#endif
a0d0e21e	521	errvalid++;
	522	strcpy(errbuf, "readExports: bad magic");
	523	while(ldclose(ldp) == FAILURE)
	524	;
	525	return -1;
	526	}
	527	if (ldnshread(ldp, _LOADER, &sh) != SUCCESS) {
	528	errvalid++;
	529	strcpy(errbuf, "readExports: cannot read loader section header");
	530	while(ldclose(ldp) == FAILURE)
	531	;
	532	return -1;
	533	}
	534	/*
	535	* We read the complete loader section in one chunk, this makes
	536	* finding long symbol names residing in the string table easier.
	537	*/
	538	if ((ldbuf = (char *)safemalloc(sh.s_size)) == NULL) {
	539	errvalid++;
	540	strcpy(errbuf, "readExports: ");
fd206186	541	strerrorcat(errbuf, errno);
a0d0e21e	542	while(ldclose(ldp) == FAILURE)
	543	;
	544	return -1;
	545	}
	546	if (FSEEK(ldp, sh.s_scnptr, BEGINNING) != OKFSEEK) {
	547	errvalid++;
	548	strcpy(errbuf, "readExports: cannot seek to loader section");
	549	safefree(ldbuf);
	550	while(ldclose(ldp) == FAILURE)
	551	;
	552	return -1;
	553	}
1553ab04	554	/* This first case is a hack, since it assumes that the 3rd parameter to
1553ab04	555	FREAD is 1. See the redefinition of FREAD above to see how this works. */
a0d0e21e	556	if (FREAD(ldbuf, sh.s_size, 1, ldp) != 1) {
	557	errvalid++;
	558	strcpy(errbuf, "readExports: cannot read loader section");
	559	safefree(ldbuf);
	560	while(ldclose(ldp) == FAILURE)
	561	;
	562	return -1;
	563	}
19e194ad	564	lhp = (AIX_LDHDR *)ldbuf;
19e194ad	565	ls = (AIX_LDSYM *)(ldbuf+AIX_LDHDRSZ);
a0d0e21e	566	/*
	567	* Count the number of exports to include in our export table.
	568	*/
	569	for (i = lhp->l_nsyms; i; i--, ls++) {
	570	if (!LDR_EXPORT(*ls))
	571	continue;
	572	mp->nExports++;
	573	}
	574	Newz(1001, mp->exports, mp->nExports, Export);
	575	if (mp->exports == NULL) {
	576	errvalid++;
	577	strcpy(errbuf, "readExports: ");
fd206186	578	strerrorcat(errbuf, errno);
a0d0e21e	579	safefree(ldbuf);
	580	while(ldclose(ldp) == FAILURE)
	581	;
	582	return -1;
	583	}
	584	/*
	585	* Fill in the export table. All entries are relative to
	586	* the entry point we got from load.
	587	*/
	588	ep = mp->exports;
19e194ad	589	ls = (AIX_LDSYM *)(ldbuf+AIX_LDHDRSZ);
a0d0e21e	590	for (i = lhp->l_nsyms; i; i--, ls++) {
	591	char *symname;
	592	if (!LDR_EXPORT(*ls))
	593	continue;
19e194ad	594	#ifndef USE_64_BIT_ALL
a0d0e21e	595	if (ls->l_zeroes == 0)
19e194ad	596	#endif
a0d0e21e	597	symname = ls->l_offset+lhp->l_stoff+ldbuf;
19e194ad	598	#ifndef USE_64_BIT_ALL
a0d0e21e	599	else
a0d0e21e	600	symname = ls->l_name;
19e194ad	601	#endif
a0d0e21e	602	ep->name = savepv(symname);
	603	ep->addr = (void *)((unsigned long)mp->entry + ls->l_value);
	604	ep++;
	605	}
	606	safefree(ldbuf);
	607	while(ldclose(ldp) == FAILURE)
	608	;
	609	return 0;
	610	}
	611
7ca86468	612	/*
	613	* Find the main modules entry point. This is used as export pointer
	614	* for loadbind() to be able to resolve references to the main part.
	615	*/
	616	static void * findMain(void)
	617	{
	618	struct ld_info *lp;
	619	char *buf;
	620	int size = 4*1024;
	621	int i;
	622	void *ret;
	623
	624	if ((buf = safemalloc(size)) == NULL) {
	625	errvalid++;
	626	strcpy(errbuf, "findMain: ");
	627	strerrorcat(errbuf, errno);
	628	return NULL;
	629	}
	630	while ((i = loadquery(L_GETINFO, buf, size)) == -1 && errno == ENOMEM) {
	631	safefree(buf);
	632	size += 4*1024;
	633	if ((buf = safemalloc(size)) == NULL) {
	634	errvalid++;
	635	strcpy(errbuf, "findMain: ");
	636	strerrorcat(errbuf, errno);
	637	return NULL;
	638	}
	639	}
	640	if (i == -1) {
	641	errvalid++;
	642	strcpy(errbuf, "findMain: ");
	643	strerrorcat(errbuf, errno);
	644	safefree(buf);
	645	return NULL;
	646	}
	647	/*
	648	* The first entry is the main module. The entry point
	649	* returned by load() does actually point to the data
	650	* segment origin.
	651	*/
	652	lp = (struct ld_info *)buf;
	653	ret = lp->ldinfo_dataorg;
	654	safefree(buf);
	655	return ret;
	656	}
61d42ce4	657	#endif /* USE_NATIVE_DLOPEN */
7ca86468	658
a0d0e21e	659	/* dl_dlopen.xs
	660	*
	661	* Platform: SunOS/Solaris, possibly others which use dlopen.
0536e0eb	662	* Author: Paul Marquess (Paul.Marquess@btinternet.com)
a0d0e21e	663	* Created: 10th July 1994
	664	*
	665	* Modified:
	666	* 15th July 1994 - Added code to explicitly save any error messages.
	667	* 3rd August 1994 - Upgraded to v3 spec.
	668	* 9th August 1994 - Changed to use IV
	669	* 10th August 1994 - Tim Bunce: Added RTLD_LAZY, switchable debugging,
	670	* basic FreeBSD support, removed ClearError
	671	*
	672	*/
	673
	674	/* Porting notes:
	675
	676	see dl_dlopen.xs
	677
	678	*/
	679
	680	#include "dlutils.c" /* SaveError() etc */
	681
	682
	683	static void
cea2e8a9	684	dl_private_init(pTHX)
a0d0e21e	685	{
cea2e8a9	686	(void)dl_generic_private_init(aTHX);
a0d0e21e	687	}
	688
	689	MODULE = DynaLoader PACKAGE = DynaLoader
	690
	691	BOOT:
cea2e8a9	692	(void)dl_private_init(aTHX);
a0d0e21e	693
	694
	695	void *
ff7f3c60	696	dl_load_file(filename, flags=0)
	697	char * filename
	698	int flags
a0d0e21e	699	CODE:
bf49b057	700	DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_load_file(%s,%x):\n", filename,flags));
ff7f3c60	701	if (flags & 0x01)
cea2e8a9	702	Perl_warn(aTHX_ "Can't make loaded symbols global on this platform while loading %s",filename);
61d42ce4	703	RETVAL = dlopen(filename, RTLD_GLOBAL\|RTLD_LAZY) ;
bf49b057	704	DLDEBUG(2,PerlIO_printf(Perl_debug_log, " libref=%x\n", RETVAL));
a0d0e21e	705	ST(0) = sv_newmortal() ;
a0d0e21e	706	if (RETVAL == NULL)
cea2e8a9	707	SaveError(aTHX_ "%s",dlerror()) ;
a0d0e21e	708	else
3175b8cd	709	sv_setiv( ST(0), PTR2IV(RETVAL) );
a0d0e21e	710
7ca86468	711	int
	712	dl_unload_file(libref)
	713	void * libref
	714	CODE:
	715	DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_unload_file(%lx):\n", libref));
	716	RETVAL = (dlclose(libref) == 0 ? 1 : 0);
	717	if (!RETVAL)
	718	SaveError(aTHX_ "%s", dlerror()) ;
	719	DLDEBUG(2,PerlIO_printf(Perl_debug_log, " retval = %d\n", RETVAL));
	720	OUTPUT:
	721	RETVAL
a0d0e21e	722
	723	void *
	724	dl_find_symbol(libhandle, symbolname)
	725	void * libhandle
	726	char * symbolname
	727	CODE:
bf49b057	728	DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_find_symbol(handle=%x, symbol=%s)\n",
a0d0e21e	729	libhandle, symbolname));
a0d0e21e	730	RETVAL = dlsym(libhandle, symbolname);
bf49b057	731	DLDEBUG(2,PerlIO_printf(Perl_debug_log, " symbolref = %x\n", RETVAL));
a0d0e21e	732	ST(0) = sv_newmortal() ;
a0d0e21e	733	if (RETVAL == NULL)
cea2e8a9	734	SaveError(aTHX_ "%s",dlerror()) ;
a0d0e21e	735	else
f66f545a	736	sv_setiv( ST(0), PTR2IV(RETVAL));
a0d0e21e	737
	738
	739	void
	740	dl_undef_symbols()
	741	PPCODE:
	742
	743
	744
	745	# These functions should not need changing on any platform:
	746
	747	void
	748	dl_install_xsub(perl_name, symref, filename="$Package")
	749	char * perl_name
	750	void * symref
	751	char * filename
	752	CODE:
bf49b057	753	DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_install_xsub(name=%s, symref=%x)\n",
a0d0e21e	754	perl_name, symref));
cea2e8a9	755	ST(0) = sv_2mortal(newRV((SV*)newXS(perl_name,
	756	(void()(pTHX_ CV ))symref,
	757	filename)));
a0d0e21e	758
	759
	760	char *
	761	dl_error()
	762	CODE:
	763	RETVAL = LastError ;
	764	OUTPUT:
	765	RETVAL
	766
	767	# end.