home *** CD-ROM | disk | FTP | other *** search
- /*
- * Written 3/1/94, Robert Sanders <Robert.Sanders@linux.org>
- *
- * based upon the file "dl.c", which is
- * Copyright (c) 1994, Larry Wall
- *
- * You may distribute under the terms of either the GNU General Public
- * License or the Artistic License, as specified in the README file.
- *
- * $Date: 1994/03/07 00:21:43 $
- * $Source: /home/rsanders/src/perl5alpha6/RCS/dld_dl.c,v $
- * $Revision: 1.4 $
- * $State: Exp $
- *
- * $Log: dld_dl.c,v $
- * Removed implicit link against libc. 1994/09/14 William Setzer.
- *
- * Integrated other DynaLoader changes. 1994/06/08 Tim Bunce.
- *
- * rewrote dl_load_file, misc updates. 1994/09/03 William Setzer.
- *
- * Revision 1.4 1994/03/07 00:21:43 rsanders
- * added min symbol count for load_libs and switched order so system libs
- * are loaded after app-specified libs.
- *
- * Revision 1.3 1994/03/05 01:17:26 rsanders
- * added path searching.
- *
- * Revision 1.2 1994/03/05 00:52:39 rsanders
- * added package-specified libraries.
- *
- * Revision 1.1 1994/03/05 00:33:40 rsanders
- * Initial revision
- *
- *
- */
-
- #include "EXTERN.h"
- #include "perl.h"
- #include "XSUB.h"
-
- #include <dld.h> /* GNU DLD header file */
- #include <unistd.h>
-
- #include "dlutils.c" /* for SaveError() etc */
-
- static void
- dl_private_init()
- {
- int dlderr;
- dl_generic_private_init();
- #ifdef __linux__
- dlderr = dld_init("/proc/self/exe");
- if (dlderr) {
- #endif
- dlderr = dld_init(dld_find_executable(origargv[0]));
- if (dlderr) {
- char *msg = dld_strerror(dlderr);
- SaveError("dld_init(%s) failed: %s", origargv[0], msg);
- DLDEBUG(1,fprintf(stderr,"%s", LastError));
- }
- #ifdef __linux__
- }
- #endif
- }
-
-
- MODULE = DynaLoader PACKAGE = DynaLoader
-
- BOOT:
- (void)dl_private_init();
-
-
- char *
- dl_load_file(filename)
- char * filename
- CODE:
- int dlderr,x,max;
- GV *gv;
- AV *av;
- RETVAL = filename;
- DLDEBUG(1,fprintf(stderr,"dl_load_file(%s)\n", filename));
- gv = gv_fetchpv("DynaLoader::dl_require_symbols", FALSE, SVt_PVAV);
- if (gv) {
- av = GvAV(gv);
- max = AvFILL(av);
- for (x = 0; x <= max; x++) {
- char *sym = SvPVX(*av_fetch(av, x, 0));
- DLDEBUG(1,fprintf(stderr, "dld_create_ref(%s)\n", sym));
- if (dlderr = dld_create_reference(sym)) {
- SaveError("dld_create_reference(%s): %s", sym,
- dld_strerror(dlderr));
- goto haverror;
- }
- }
- }
- DLDEBUG(1,fprintf(stderr, "dld_link(%s)\n", filename));
- if (dlderr = dld_link(filename)) {
- SaveError("dld_link(%s): %s", filename, dld_strerror(dlderr));
- goto haverror;
- }
- gv = gv_fetchpv("DynaLoader::dl_resolve_using", FALSE, SVt_PVAV);
- if (gv) {
- av = GvAV(gv);
- max = AvFILL(av);
- for (x = 0; x <= max; x++) {
- char *sym = SvPVX(*av_fetch(av, x, 0));
- DLDEBUG(1,fprintf(stderr, "dld_link(%s)\n", sym));
- if (dlderr = dld_link(sym)) {
- SaveError("dld_link(%s): %s", sym, dld_strerror(dlderr));
- goto haverror;
- }
- }
- }
- DLDEBUG(2,fprintf(stderr,"libref=%s\n", RETVAL));
- haverror:
- ST(0) = sv_newmortal() ;
- if (dlderr == 0)
- sv_setiv(ST(0), (IV)RETVAL);
-
-
- void *
- dl_find_symbol(libhandle, symbolname)
- void * libhandle
- char * symbolname
- CODE:
- DLDEBUG(2,fprintf(stderr,"dl_find_symbol(handle=%x, symbol=%s)\n",
- libhandle, symbolname));
- RETVAL = (void *)dld_get_func(symbolname);
- /* if RETVAL==NULL we should try looking for a non-function symbol */
- DLDEBUG(2,fprintf(stderr," symbolref = %x\n", RETVAL));
- ST(0) = sv_newmortal() ;
- if (RETVAL == NULL)
- SaveError("dl_find_symbol: Unable to find '%s' symbol", symbolname) ;
- else
- sv_setiv(ST(0), (IV)RETVAL);
-
-
- void
- dl_undef_symbols()
- PPCODE:
- if (dld_undefined_sym_count) {
- int x;
- char **undef_syms = dld_list_undefined_sym();
- EXTEND(sp, dld_undefined_sym_count);
- for (x=0; x < dld_undefined_sym_count; x++)
- PUSHs(sv_2mortal(newSVpv(undef_syms[x]+1, 0)));
- free(undef_syms);
- }
-
-
-
- # 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,fprintf(stderr,"dl_install_xsub(name=%s, symref=%x)\n",
- perl_name, symref));
- ST(0)=sv_2mortal(newRV((SV*)newXS(perl_name, (void(*)())symref, filename)));
-
-
- char *
- dl_error()
- CODE:
- RETVAL = LastError ;
- OUTPUT:
- RETVAL
-
- # end.
-