178 lines
4.7 KiB
Plaintext
178 lines
4.7 KiB
Plaintext
/*
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* Written 3/1/94, Robert Sanders <Robert.Sanders@linux.org>
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*
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* based upon the file "dl.c", which is
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* Copyright (c) 1994, Larry Wall
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*
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* You may distribute under the terms of either the GNU General Public
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* License or the Artistic License, as specified in the README file.
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*
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* $Date: 1994/03/07 00:21:43 $
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* $Source: /home/rsanders/src/perl5alpha6/RCS/dld_dl.c,v $
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* $Revision: 1.4 $
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* $State: Exp $
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*
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* $Log: dld_dl.c,v $
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* Removed implicit link against libc. 1994/09/14 William Setzer.
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*
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* Integrated other DynaLoader changes. 1994/06/08 Tim Bunce.
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*
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* rewrote dl_load_file, misc updates. 1994/09/03 William Setzer.
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*
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* Revision 1.4 1994/03/07 00:21:43 rsanders
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* added min symbol count for load_libs and switched order so system libs
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* are loaded after app-specified libs.
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*
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* Revision 1.3 1994/03/05 01:17:26 rsanders
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* added path searching.
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*
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* Revision 1.2 1994/03/05 00:52:39 rsanders
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* added package-specified libraries.
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*
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* Revision 1.1 1994/03/05 00:33:40 rsanders
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* Initial revision
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*
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*
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*/
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#include "EXTERN.h"
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#include "perl.h"
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#include "XSUB.h"
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#include <dld.h> /* GNU DLD header file */
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#include <unistd.h>
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#include "dlutils.c" /* for SaveError() etc */
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static AV *dl_resolve_using = Nullav;
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static AV *dl_require_symbols = Nullav;
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static void
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dl_private_init(pTHX)
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{
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int dlderr;
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dl_generic_private_init(aTHX);
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dl_resolve_using = get_av("DynaLoader::dl_resolve_using", GV_ADDMULTI);
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dl_require_symbols = get_av("DynaLoader::dl_require_symbols", GV_ADDMULTI);
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#ifdef __linux__
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dlderr = dld_init("/proc/self/exe");
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if (dlderr) {
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#endif
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dlderr = dld_init(dld_find_executable(PL_origargv[0]));
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if (dlderr) {
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char *msg = dld_strerror(dlderr);
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SaveError(aTHX_ "dld_init(%s) failed: %s", PL_origargv[0], msg);
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DLDEBUG(1,PerlIO_printf(Perl_debug_log, "%s", LastError));
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}
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#ifdef __linux__
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}
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#endif
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}
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MODULE = DynaLoader PACKAGE = DynaLoader
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BOOT:
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(void)dl_private_init();
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char *
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dl_load_file(filename, flags=0)
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char * filename
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int flags
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PREINIT:
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int dlderr,x,max;
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GV *gv;
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CODE:
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RETVAL = filename;
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DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_load_file(%s,%x):\n", filename,flags));
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if (flags & 0x01)
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Perl_croak(aTHX_ "Can't make loaded symbols global on this platform while loading %s",filename);
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max = AvFILL(dl_require_symbols);
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for (x = 0; x <= max; x++) {
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char *sym = SvPVX(*av_fetch(dl_require_symbols, x, 0));
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DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dld_create_ref(%s)\n", sym));
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if (dlderr = dld_create_reference(sym)) {
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SaveError(aTHX_ "dld_create_reference(%s): %s", sym,
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dld_strerror(dlderr));
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goto haverror;
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}
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}
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DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dld_link(%s)\n", filename));
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if (dlderr = dld_link(filename)) {
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SaveError(aTHX_ "dld_link(%s): %s", filename, dld_strerror(dlderr));
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goto haverror;
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}
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max = AvFILL(dl_resolve_using);
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for (x = 0; x <= max; x++) {
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char *sym = SvPVX(*av_fetch(dl_resolve_using, x, 0));
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DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dld_link(%s)\n", sym));
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if (dlderr = dld_link(sym)) {
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SaveError(aTHX_ "dld_link(%s): %s", sym, dld_strerror(dlderr));
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goto haverror;
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}
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}
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DLDEBUG(2,PerlIO_printf(Perl_debug_log, "libref=%s\n", RETVAL));
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haverror:
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ST(0) = sv_newmortal() ;
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if (dlderr == 0)
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sv_setiv(ST(0), PTR2IV(RETVAL));
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void *
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dl_find_symbol(libhandle, symbolname)
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void * libhandle
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char * symbolname
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CODE:
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DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_find_symbol(handle=%x, symbol=%s)\n",
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libhandle, symbolname));
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RETVAL = (void *)dld_get_func(symbolname);
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/* if RETVAL==NULL we should try looking for a non-function symbol */
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DLDEBUG(2,PerlIO_printf(Perl_debug_log, " symbolref = %x\n", RETVAL));
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ST(0) = sv_newmortal() ;
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if (RETVAL == NULL)
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SaveError(aTHX_ "dl_find_symbol: Unable to find '%s' symbol", symbolname) ;
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else
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sv_setiv(ST(0), PTR2IV(RETVAL));
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void
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dl_undef_symbols()
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PPCODE:
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if (dld_undefined_sym_count) {
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int x;
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char **undef_syms = dld_list_undefined_sym();
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EXTEND(SP, dld_undefined_sym_count);
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for (x=0; x < dld_undefined_sym_count; x++)
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PUSHs(sv_2mortal(newSVpv(undef_syms[x]+1, 0)));
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free(undef_syms);
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}
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# These functions should not need changing on any platform:
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void
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dl_install_xsub(perl_name, symref, filename="$Package")
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char * perl_name
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void * symref
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char * filename
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CODE:
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DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_install_xsub(name=%s, symref=%x)\n",
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perl_name, symref));
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ST(0) = sv_2mortal(newRV((SV*)newXS(perl_name,
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(void(*)(pTHX_ CV *))symref,
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filename)));
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char *
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dl_error()
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CODE:
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RETVAL = LastError ;
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OUTPUT:
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RETVAL
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# end.
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