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 $
15 * Adapted for use with FreeMINT after dld support was removed from perl.
18 * Removed implicit link against libc. 1994/09/14 William Setzer.
20 * Integrated other DynaLoader changes. 1994/06/08 Tim Bunce.
22 * rewrote dl_load_file, misc updates. 1994/09/03 William Setzer.
24 * Revision 1.4 1994/03/07 00:21:43 rsanders
25 * added min symbol count for load_libs and switched order so system libs
26 * are loaded after app-specified libs.
28 * Revision 1.3 1994/03/05 01:17:26 rsanders
29 * added path searching.
31 * Revision 1.2 1994/03/05 00:52:39 rsanders
32 * added package-specified libraries.
34 * Revision 1.1 1994/03/05 00:33:40 rsanders
42 #define PERL_IN_DL_FREEMINT_XS
46 #include <dld.h> /* GNU DLD header file */
51 AV * x_require_symbols;
52 } my_cxtx_t; /* this *must* be named my_cxtx_t */
54 #define DL_CXT_EXTRA /* ask for dl_cxtx to be defined in dlutils.c */
55 #include "dlutils.c" /* for SaveError() etc */
57 #define dl_resolve_using (dl_cxtx.x_resolve_using)
58 #define dl_require_symbols (dl_cxtx.x_require_symbols)
63 dl_generic_private_init(aTHX);
68 dl_resolve_using = get_av("DynaLoader::dl_resolve_using", GV_ADDMULTI);
69 dl_require_symbols = get_av("DynaLoader::dl_require_symbols", GV_ADDMULTI);
70 dlderr = dld_init("/kern/self/exe");
72 dlderr = dld_init(dld_find_executable(PL_origargv[0]));
74 char *msg = dld_strerror(dlderr);
75 SaveError(aTHX_ "dld_init(%s) failed: %s", dld_find_executable(PL_origargv[0]), msg);
76 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)
98 DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_load_file(%s,%x):\n", filename,flags));
100 Perl_croak(aTHX_ "Can't make loaded symbols global on this platform while loading %s",filename);
101 max = AvFILL(dl_require_symbols);
102 for (x = 0; x <= max; x++) {
103 char *sym = SvPVX(*av_fetch(dl_require_symbols, x, 0));
104 DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dld_create_ref(%s)\n", sym));
105 if (dlderr = dld_create_reference(sym)) {
106 SaveError(aTHX_ "dld_create_reference(%s): %s", sym,
107 dld_strerror(dlderr));
112 DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dld_link(%s)\n", filename));
113 if (dlderr = dld_link(filename)) {
114 SaveError(aTHX_ "dld_link(%s): %s", filename, dld_strerror(dlderr));
118 DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dld_link(libm.a)\n"));
119 if (dlderr = dld_link("/usr/lib/libm.a")) {
120 SaveError(aTHX_ "dld_link(libm.a): %s", dld_strerror(dlderr));
124 DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dld_link(libc.a)\n"));
125 if (dlderr = dld_link("/usr/lib/libc.a")) {
126 SaveError(aTHX_ "dld_link(libc.a): %s", dld_strerror(dlderr));
130 max = AvFILL(dl_resolve_using);
131 for (x = 0; x <= max; x++) {
132 char *sym = SvPVX(*av_fetch(dl_resolve_using, x, 0));
133 DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dld_link(%s)\n", sym));
134 if (dlderr = dld_link(sym)) {
135 SaveError(aTHX_ "dld_link(%s): %s", sym, dld_strerror(dlderr));
139 DLDEBUG(2,PerlIO_printf(Perl_debug_log, "libref=%s\n", filename));
141 ST(0) = sv_newmortal() ;
143 sv_setiv(ST(0), PTR2IV(filename));
148 dl_find_symbol(libhandle, symbolname, ign_err=0)
155 DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_find_symbol(handle=%x, symbol=%s)\n",
156 libhandle, symbolname));
157 retv = (void *)dld_get_func(symbolname);
158 DLDEBUG(2,PerlIO_printf(Perl_debug_log, " symbolref = %x\n", (unsigned int)retv));
159 ST(0) = sv_newmortal() ;
162 SaveError(aTHX_ "dl_find_symbol: Unable to find '%s' symbol", symbolname) ;
164 sv_setiv(ST(0), PTR2IV(retv));
171 if (dld_undefined_sym_count) {
173 char **undef_syms = dld_list_undefined_sym();
174 EXTEND(SP, dld_undefined_sym_count);
175 for (x=0; x < dld_undefined_sym_count; x++)
176 PUSHs(sv_2mortal(newSVpv(undef_syms[x]+1, 0)));
182 # These functions should not need changing on any platform:
185 dl_install_xsub(perl_name, symref, filename="$Package")
188 const char * filename
190 DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_install_xsub(name=%s, symref=%x)\n",
192 ST(0) = sv_2mortal(newRV((SV*)newXS_flags(perl_name,
193 (void(*)(pTHX_ CV *))symref,
195 XS_DYNAMIC_FILENAME)));
202 RETVAL = newSVsv(MY_CXT.x_dl_last_error);
206 #if defined(USE_ITHREADS)
213 /* MY_CXT_CLONE just does a memcpy on the whole structure, so to avoid
214 * using Perl variables that belong to another thread, we create our
215 * own for this thread.
217 MY_CXT.x_dl_last_error = newSVpvs("");
218 dl_resolve_using = get_av("DynaLoader::dl_resolve_using", GV_ADDMULTI);
219 dl_require_symbols = get_av("DynaLoader::dl_require_symbols", GV_ADDMULTI);