1 /* 2 * Written 3/1/94, Robert Sanders <Robert.Sanders@linux.org> 3 * 4 * based upon the file "dl.c", which is 5 * Copyright (c) 1994, Larry Wall 6 * 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. 9 * 10 * $Date: 1994/03/07 00:21:43 $ 11 * $Source: /home/rsanders/src/perl5alpha6/RCS/dld_dl.c,v $ 12 * $Revision: 1.4 $ 13 * $State: Exp $ 14 * 15 * Adapted for use with FreeMINT after dld support was removed from perl. 16 * 17 * $Log: dld_dl.c,v $ 18 * Removed implicit link against libc. 1994/09/14 William Setzer. 19 * 20 * Integrated other DynaLoader changes. 1994/06/08 Tim Bunce. 21 * 22 * rewrote dl_load_file, misc updates. 1994/09/03 William Setzer. 23 * 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. 27 * 28 * Revision 1.3 1994/03/05 01:17:26 rsanders 29 * added path searching. 30 * 31 * Revision 1.2 1994/03/05 00:52:39 rsanders 32 * added package-specified libraries. 33 * 34 * Revision 1.1 1994/03/05 00:33:40 rsanders 35 * Initial revision 36 * 37 * 38 */ 39 40 #include "EXTERN.h" 41 #include "perl.h" 42 #include "XSUB.h" 43 44 #include <dld.h> /* GNU DLD header file */ 45 #include <unistd.h> 46 47 typedef struct { 48 AV * x_resolve_using; 49 AV * x_require_symbols; 50 } my_cxtx_t; /* this *must* be named my_cxtx_t */ 51 52 #define DL_CXT_EXTRA /* ask for dl_cxtx to be defined in dlutils.c */ 53 #include "dlutils.c" /* for SaveError() etc */ 54 55 #define dl_resolve_using (dl_cxtx.x_resolve_using) 56 #define dl_require_symbols (dl_cxtx.x_require_symbols) 57 58 static void 59 dl_private_init(pTHX) 60 { 61 dl_generic_private_init(aTHX); 62 { 63 int dlderr; 64 dMY_CXT; 65 66 dl_resolve_using = get_av("DynaLoader::dl_resolve_using", GV_ADDMULTI); 67 dl_require_symbols = get_av("DynaLoader::dl_require_symbols", GV_ADDMULTI); 68 dlderr = dld_init("/kern/self/exe"); 69 if (dlderr) { 70 dlderr = dld_init(dld_find_executable(PL_origargv[0])); 71 if (dlderr) { 72 char *msg = dld_strerror(dlderr); 73 SaveError(aTHX_ "dld_init(%s) failed: %s", dld_find_executable(PL_origargv[0]), msg); 74 DLDEBUG(1,PerlIO_printf(Perl_debug_log, "%s", dl_last_error)); 75 } 76 } 77 } 78 } 79 80 81 MODULE = DynaLoader PACKAGE = DynaLoader 82 83 BOOT: 84 (void)dl_private_init(); 85 86 87 void 88 dl_load_file(filename, flags=0) 89 char * filename 90 int flags 91 PREINIT: 92 int dlderr,x,max; 93 GV *gv; 94 dMY_CXT; 95 CODE: 96 DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dl_load_file(%s,%x):\n", filename,flags)); 97 if (flags & 0x01) 98 Perl_croak(aTHX_ "Can't make loaded symbols global on this platform while loading %s",filename); 99 max = AvFILL(dl_require_symbols); 100 for (x = 0; x <= max; x++) { 101 char *sym = SvPVX(*av_fetch(dl_require_symbols, x, 0)); 102 DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dld_create_ref(%s)\n", sym)); 103 if (dlderr = dld_create_reference(sym)) { 104 SaveError(aTHX_ "dld_create_reference(%s): %s", sym, 105 dld_strerror(dlderr)); 106 goto haverror; 107 } 108 } 109 110 DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dld_link(%s)\n", filename)); 111 if (dlderr = dld_link(filename)) { 112 SaveError(aTHX_ "dld_link(%s): %s", filename, dld_strerror(dlderr)); 113 goto haverror; 114 } 115 116 DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dld_link(libm.a)\n")); 117 if (dlderr = dld_link("/usr/lib/libm.a")) { 118 SaveError(aTHX_ "dld_link(libm.a): %s", dld_strerror(dlderr)); 119 goto haverror; 120 } 121 122 DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dld_link(libc.a)\n")); 123 if (dlderr = dld_link("/usr/lib/libc.a")) { 124 SaveError(aTHX_ "dld_link(libc.a): %s", dld_strerror(dlderr)); 125 goto haverror; 126 } 127 128 max = AvFILL(dl_resolve_using); 129 for (x = 0; x <= max; x++) { 130 char *sym = SvPVX(*av_fetch(dl_resolve_using, x, 0)); 131 DLDEBUG(1,PerlIO_printf(Perl_debug_log, "dld_link(%s)\n", sym)); 132 if (dlderr = dld_link(sym)) { 133 SaveError(aTHX_ "dld_link(%s): %s", sym, dld_strerror(dlderr)); 134 goto haverror; 135 } 136 } 137 DLDEBUG(2,PerlIO_printf(Perl_debug_log, "libref=%s\n", filename)); 138 haverror: 139 ST(0) = sv_newmortal() ; 140 if (dlderr == 0) 141 sv_setiv(ST(0), PTR2IV(filename)); 142 XSRETURN(1); 143 144 145 void 146 dl_find_symbol(libhandle, symbolname) 147 void * libhandle 148 char * symbolname 149 PREINIT: 150 void *retv; 151 CODE: 152 DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_find_symbol(handle=%x, symbol=%s)\n", 153 libhandle, symbolname)); 154 retv = (void *)dld_get_func(symbolname); 155 DLDEBUG(2,PerlIO_printf(Perl_debug_log, " symbolref = %x\n", (unsigned int)retv)); 156 ST(0) = sv_newmortal() ; 157 if (retv == NULL) 158 SaveError(aTHX_ "dl_find_symbol: Unable to find '%s' symbol", symbolname) ; 159 else 160 sv_setiv(ST(0), PTR2IV(retv)); 161 XSRETURN(1); 162 163 164 void 165 dl_undef_symbols() 166 PPCODE: 167 if (dld_undefined_sym_count) { 168 int x; 169 char **undef_syms = dld_list_undefined_sym(); 170 EXTEND(SP, dld_undefined_sym_count); 171 for (x=0; x < dld_undefined_sym_count; x++) 172 PUSHs(sv_2mortal(newSVpv(undef_syms[x]+1, 0))); 173 free(undef_syms); 174 } 175 176 177 178 # These functions should not need changing on any platform: 179 180 void 181 dl_install_xsub(perl_name, symref, filename="$Package") 182 char * perl_name 183 void * symref 184 const char * filename 185 CODE: 186 DLDEBUG(2,PerlIO_printf(Perl_debug_log, "dl_install_xsub(name=%s, symref=%x)\n", 187 perl_name, symref)); 188 ST(0) = sv_2mortal(newRV((SV*)newXS_flags(perl_name, 189 (void(*)(pTHX_ CV *))symref, 190 filename, NULL, 191 XS_DYNAMIC_FILENAME))); 192 XSRETURN(1); 193 194 char * 195 dl_error() 196 PREINIT: 197 dMY_CXT; 198 CODE: 199 RETVAL = dl_last_error ; 200 OUTPUT: 201 RETVAL 202 203 #if defined(USE_ITHREADS) 204 205 void 206 CLONE(...) 207 CODE: 208 MY_CXT_CLONE; 209 210 /* MY_CXT_CLONE just does a memcpy on the whole structure, so to avoid 211 * using Perl variables that belong to another thread, we create our 212 * own for this thread. 213 */ 214 MY_CXT.x_dl_last_error = newSVpvn("", 0); 215 dl_resolve_using = get_av("DynaLoader::dl_resolve_using", GV_ADDMULTI); 216 dl_require_symbols = get_av("DynaLoader::dl_require_symbols", GV_ADDMULTI); 217 218 #endif 219 220 # end. 221