#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 <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_xlC_load_h)
+# include "/usr/lpp/xlC/include/load.h"
+# elif defined(USE_ibmcxx_load_h)
+# include "/usr/ibmcxx/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.
/* If using PerlIO, redefine these macros from <ldfcn.h> */
#ifdef USE_PERLIO
+#undef FSEEK
+#undef FREAD
#define FSEEK(ldptr,o,p) PerlIO_seek(IOPTR(ldptr),(p==BEGINNING)?(OFFSET(ldptr)+o):o,p)
#define FREAD(p,s,n,ldptr) PerlIO_read(IOPTR(ldptr),p,s*n)
#endif
} Module, *ModulePtr;
/*
- * We keep a list of all loaded modules to be able to call the fini
- * handlers at atexit() time.
+ * We keep a list of all loaded modules to be able to reference count
+ * duplicate dlopen's.
*/
static ModulePtr modList; /* XXX threaded */
static void caterr(char *);
static int readExports(ModulePtr);
-static void terminate(void);
+static void *findMain(void);
static char *strerror_failed = "(strerror failed)";
static char *strerror_r_failed = "(strerror_r failed)";
{
dTHX;
register ModulePtr mp;
- static int inited; /* XXX threaded */
+ static void *mainModule; /* XXX threaded */
/*
* Upon the first call register a terminate handler that will
* close all libraries.
*/
- if (!inited) {
- inited++;
- atexit(terminate);
+ if (mainModule == NULL) {
+ if ((mainModule = findMain()) == NULL)
+ return NULL;
}
/*
* Scan the list of modules if have the module already loaded.
* load should be declared load(const char *...). Thus we
* cast the path to a normal char *. Ugly.
*/
- if ((mp->entry = (void *)load((char *)path,
+ if ((mp->entry = (void *)LOAD((char *)path,
#ifdef L_LIBPATH_EXEC
L_LIBPATH_EXEC |
#endif
/*
* 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.
+ * 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) {
+ if (loadbind(0, (void *)dlopen, mp->entry) == -1 ||
+ loadbind(0, mainModule, mp->entry)) {
int saverrno = errno;
dlclose(mp);
if (--mp->refCnt > 0)
return 0;
- result = unload(mp->entry);
+ result = UNLOAD(mp->entry);
if (result == -1) {
errvalid++;
strerrorcpy(errbuf, errno);
return result;
}
-static void terminate(void)
-{
- while (modList)
- dlclose(modList);
-}
-
/* 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.
{
dTHX;
LDFILE *ldp = NULL;
- SCNHDR sh;
- LDHDR *lhp;
+ AIX_SCNHDR sh;
+ AIX_LDHDR *lhp;
char *ldbuf;
- LDSYM *ls;
+ AIX_LDSYM *ls;
int i;
ExportPtr ep;
}
/*
* Traverse the list of loaded modules. The entry point
- * returned by load() does actually point to the data
+ * returned by LOAD() does actually point to the data
* segment origin.
*/
lp = (struct ld_info *)buf;
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;
}
- lhp = (LDHDR *)ldbuf;
- ls = (LDSYM *)(ldbuf+LDHDRSZ);
+ lhp = (AIX_LDHDR *)ldbuf;
+ ls = (AIX_LDSYM *)(ldbuf+AIX_LDHDRSZ);
/*
* Count the number of exports to include in our export table.
*/
* the entry point we got from load.
*/
ep = mp->exports;
- ls = (LDSYM *)(ldbuf+LDHDRSZ);
+ 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++;
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;
+}
+
/* dl_dlopen.xs
*
* Platform: SunOS/Solaris, possibly others which use dlopen.
- * Author: Paul Marquess (pmarquess@bfsec.bt.co.uk)
+ * Author: Paul Marquess (Paul.Marquess@btinternet.com)
* Created: 10th July 1994
*
* Modified:
char * filename
int flags
CODE:
- DLDEBUG(1,PerlIO_printf(PerlIO_stderr(), "dl_load_file(%s,%x):\n", filename,flags));
+ 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, 1) ;
- DLDEBUG(2,PerlIO_printf(PerlIO_stderr(), " libref=%x\n", RETVAL));
+ 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));
-
+ 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(PerlIO_stderr(), "dl_find_symbol(handle=%x, symbol=%s)\n",
+ 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(PerlIO_stderr(), " symbolref = %x\n", RETVAL));
+ DLDEBUG(2,PerlIO_printf(Perl_debug_log, " symbolref = %x\n", RETVAL));
ST(0) = sv_newmortal() ;
if (RETVAL == NULL)
SaveError(aTHX_ "%s",dlerror()) ;
void * symref
char * filename
CODE:
- DLDEBUG(2,PerlIO_printf(PerlIO_stderr(), "dl_install_xsub(name=%s, symref=%x)\n",
+ 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,
https://perl5.git.perl.org / perl5.git / blobdiff