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/*
* 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>
typedef struct {
AV * x_resolve_using;
AV * x_require_symbols;
} my_cxtx_t; /* this *must* be named my_cxtx_t */
#define DL_CXT_EXTRA /* ask for dl_cxtx to be defined in dlutils.c */
#include "dlutils.c" /* for SaveError() etc */
#define dl_resolve_using (dl_cxtx.x_resolve_using)
#define dl_require_symbols (dl_cxtx.x_require_symbols)
static void
dl_private_init(pTHX)
{
dl_generic_private_init(aTHX);
{
int dlderr;
dMY_CXT;
dl_resolve_using = get_av("DynaLoader::dl_resolve_using", GV_ADDMULTI);
dl_require_symbols = get_av("DynaLoader::dl_require_symbols", GV_ADDMULTI);
#ifdef __linux__
dlderr = dld_init("/proc/self/exe");
if (dlderr) {
#endif
dlderr = dld_init(dld_find_executable(PL_origargv[0]));
if (dlderr) {
char *msg = dld_strerror(dlderr);
SaveError(aTHX_ "dld_init(%s) failed: %s", PL_origargv[0], msg);
DLDEBUG(1,PerlIO_printf(Perl_debug_log, "%s", dl_last_error));
}
#ifdef __linux__
}
#endif
}
}
MODULE = DynaLoader PACKAGE = DynaLoader
BOOT:
(void)dl_private_init();
char *
dl_load_file(filename, flags=0)
char * filename
int flags
PREINIT:
int dlderr,x,max;
GV *gv;
dMY_CXT;
CODE:
RETVAL = filename;
DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_load_file(%s,%x):\n", filename,flags));
if (flags & 0x01)
Perl_croak(aTHX_ "Can't make loaded symbols global on this platform while loading %s",filename);
max = AvFILL(dl_require_symbols);
for (x = 0; x <= max; x++) {
char *sym = SvPVX(*av_fetch(dl_require_symbols, x, 0));
DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dld_create_ref(%s)\n", sym));
if (dlderr = dld_create_reference(sym)) {
SaveError(aTHX_ "dld_create_reference(%s): %s", sym,
dld_strerror(dlderr));
goto haverror;
}
}
DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dld_link(%s)\n", filename));
if (dlderr = dld_link(filename)) {
SaveError(aTHX_ "dld_link(%s): %s", filename, dld_strerror(dlderr));
goto haverror;
}
max = AvFILL(dl_resolve_using);
for (x = 0; x <= max; x++) {
char *sym = SvPVX(*av_fetch(dl_resolve_using, x, 0));
DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dld_link(%s)\n", sym));
if (dlderr = dld_link(sym)) {
SaveError(aTHX_ "dld_link(%s): %s", sym, dld_strerror(dlderr));
goto haverror;
}
}
DLDEBUG(2,PerlIO_printf(Perl_debug_log, "libref=%s\n", RETVAL));
haverror:
ST(0) = sv_newmortal() ;
if (dlderr == 0)
sv_setiv(ST(0), PTR2IV(RETVAL));
void *
dl_find_symbol(libhandle, symbolname)
void * libhandle
char * symbolname
CODE:
DLDEBUG(2,PerlIO_printf(Perl_debug_log, "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,PerlIO_printf(Perl_debug_log, " symbolref = %x\n", RETVAL));
ST(0) = sv_newmortal() ;
if (RETVAL == NULL)
SaveError(aTHX_ "dl_find_symbol: Unable to find '%s' symbol", symbolname) ;
else
sv_setiv(ST(0), PTR2IV(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
const char * filename
CODE:
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_flags(perl_name,
(void(*)(pTHX_ CV *))symref,
filename, NULL,
XS_DYNAMIC_FILENAME)));
char *
dl_error()
PREINIT:
dMY_CXT;
CODE:
RETVAL = dl_last_error ;
OUTPUT:
RETVAL
#if defined(USE_ITHREADS)
void
CLONE(...)
CODE:
MY_CXT_CLONE;
/* MY_CXT_CLONE just does a memcpy on the whole structure, so to avoid
* using Perl variables that belong to another thread, we create our
* own for this thread.
*/
MY_CXT.x_dl_last_error = newSVpvn("", 0);
dl_resolve_using = get_av("DynaLoader::dl_resolve_using", GV_ADDMULTI);
dl_require_symbols = get_av("DynaLoader::dl_require_symbols", GV_ADDMULTI);
#endif
# end.
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