2 * Written 3/1/94, Robert Sanders <Robert.Sanders@linux.org>
4 * based upon the file "dl.c", which is
5 * Copyright (c) 1994, Larry Wall
7 * You may distribute under the terms of either the GNU General Public
8 * License or the Artistic License, as specified in the README file.
10 * $Date: 1994/03/07 00:21:43 $
11 * $Source: /home/rsanders/src/perl5alpha6/RCS/dld_dl.c,v $
16 * Removed implicit link against libc. 1994/09/14 William Setzer.
18 * Integrated other DynaLoader changes. 1994/06/08 Tim Bunce.
20 * rewrote dl_load_file, misc updates. 1994/09/03 William Setzer.
22 * Revision 1.4 1994/03/07 00:21:43 rsanders
23 * added min symbol count for load_libs and switched order so system libs
24 * are loaded after app-specified libs.
26 * Revision 1.3 1994/03/05 01:17:26 rsanders
27 * added path searching.
29 * Revision 1.2 1994/03/05 00:52:39 rsanders
30 * added package-specified libraries.
32 * Revision 1.1 1994/03/05 00:33:40 rsanders
42 #include <dld.h> /* GNU DLD header file */
47 AV * x_require_symbols;
48 } my_cxtx_t; /* this *must* be named my_cxtx_t */
50 #define DL_CXT_EXTRA /* ask for dl_cxtx to be defined in dlutils.c */
51 #include "dlutils.c" /* for SaveError() etc */
53 #define dl_resolve_using (dl_cxtx.x_resolve_using)
54 #define dl_require_symbols (dl_cxtx.x_require_symbols)
59 dl_generic_private_init(aTHX);
64 dl_resolve_using = get_av("DynaLoader::dl_resolve_using", GV_ADDMULTI);
65 dl_require_symbols = get_av("DynaLoader::dl_require_symbols", GV_ADDMULTI);
67 dlderr = dld_init("/proc/self/exe");
70 dlderr = dld_init(dld_find_executable(PL_origargv[0]));
72 char *msg = dld_strerror(dlderr);
73 SaveError(aTHX_ "dld_init(%s) failed: %s", PL_origargv[0], msg);
74 DLDEBUG(1,PerlIO_printf(Perl_debug_log, "%s", dl_last_error));
83 MODULE = DynaLoader PACKAGE = DynaLoader
86 (void)dl_private_init();
90 dl_load_file(filename, flags=0)
99 DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_load_file(%s,%x):\n", filename,flags));
101 Perl_croak(aTHX_ "Can't make loaded symbols global on this platform while loading %s",filename);
102 max = AvFILL(dl_require_symbols);
103 for (x = 0; x <= max; x++) {
104 char *sym = SvPVX(*av_fetch(dl_require_symbols, x, 0));
105 DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dld_create_ref(%s)\n", sym));
106 if (dlderr = dld_create_reference(sym)) {
107 SaveError(aTHX_ "dld_create_reference(%s): %s", sym,
108 dld_strerror(dlderr));
113 DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dld_link(%s)\n", filename));
114 if (dlderr = dld_link(filename)) {
115 SaveError(aTHX_ "dld_link(%s): %s", filename, dld_strerror(dlderr));
119 max = AvFILL(dl_resolve_using);
120 for (x = 0; x <= max; x++) {
121 char *sym = SvPVX(*av_fetch(dl_resolve_using, x, 0));
122 DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dld_link(%s)\n", sym));
123 if (dlderr = dld_link(sym)) {
124 SaveError(aTHX_ "dld_link(%s): %s", sym, dld_strerror(dlderr));
128 DLDEBUG(2,PerlIO_printf(Perl_debug_log, "libref=%s\n", RETVAL));
130 ST(0) = sv_newmortal() ;
132 sv_setiv(ST(0), PTR2IV(RETVAL));
136 dl_find_symbol(libhandle, symbolname)
140 DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_find_symbol(handle=%x, symbol=%s)\n",
141 libhandle, symbolname));
142 RETVAL = (void *)dld_get_func(symbolname);
143 /* if RETVAL==NULL we should try looking for a non-function symbol */
144 DLDEBUG(2,PerlIO_printf(Perl_debug_log, " symbolref = %x\n", RETVAL));
145 ST(0) = sv_newmortal() ;
147 SaveError(aTHX_ "dl_find_symbol: Unable to find '%s' symbol", symbolname) ;
149 sv_setiv(ST(0), PTR2IV(RETVAL));
155 if (dld_undefined_sym_count) {
157 char **undef_syms = dld_list_undefined_sym();
158 EXTEND(SP, dld_undefined_sym_count);
159 for (x=0; x < dld_undefined_sym_count; x++)
160 PUSHs(sv_2mortal(newSVpv(undef_syms[x]+1, 0)));
166 # These functions should not need changing on any platform:
169 dl_install_xsub(perl_name, symref, filename="$Package")
172 const char * filename
174 DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_install_xsub(name=%s, symref=%x)\n",
176 ST(0) = sv_2mortal(newRV((SV*)newXS_flags(perl_name,
177 (void(*)(pTHX_ CV *))symref,
179 XS_DYNAMIC_FILENAME)));
186 RETVAL = dl_last_error ;