104 lines
2.4 KiB
C
104 lines
2.4 KiB
C
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/*************************************************************************
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* *
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* YAP Prolog *
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* *
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* Yap Prolog was developed at NCCUP - Universidade do Porto *
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* *
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* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
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* *
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**************************************************************************
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* *
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* File: load_dld.c *
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* comments: dld based dynamic loaderr of external routines *
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* tested on i486-linuxaout *
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*************************************************************************/
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#if defined(linux) && !defined(__ELF__) && !defined(__LCC__)
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#include "Foreign.h"
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#include <dld.h>
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#include <malloc.h>
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#include <stdio.h>
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/*
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* YAPFindExecutable(argv[0]) should be called on yap initialization to
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* locate the executable of Yap
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*/
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void
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YAPFindExecutable(char *name)
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{
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/* use dld_find_executable */
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char *res;
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if(name != NULL && (res=dld_find_executable(name))) {
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strcpy(YapExecutable,res);
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} else {
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strcpy(YapExecutable,"./yap");
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}
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}
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/*
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* LoadForeign(ofiles,libs,proc_name,init_proc) dynamically loads foreign
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* code files and libraries and locates an initialization routine
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*/
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int
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LoadForeign(StringList ofiles, StringList libs,
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char *proc_name, YapInitProc *init_proc)
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{
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static int firstTime = 1;
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int error;
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if(firstTime) {
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error = dld_init(YapExecutable);
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if(error) {
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strcpy(LoadMsg,dld_strerror(error));
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return LOAD_FAILLED;
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}
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firstTime=0;
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}
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while (ofiles) {
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if((error=dld_link(ofiles->s)) !=0) {
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strcpy(LoadMsg,dld_strerror(error));
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return LOAD_FAILLED;
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}
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ofiles = ofiles->next;
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}
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/* TODO: handle libs */
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*init_proc = (YapInitProc) dld_get_func(proc_name);
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if(! *init_proc) {
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strcpy(LoadMsg,"Could not locate initialization routine");
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return LOAD_FAILLED;
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}
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if(!dld_function_executable_p(proc_name)) {
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char **undefs = dld_list_undefined_sym();
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char **p = undefs;
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int k = dld_undefined_sym_count;
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strcpy(LoadMsg,"Could not resolve all symbols");
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while(k) {
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YP_printf("[undefined symbol %s]\n",*p++);
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--k;
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}
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free(undefs);
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return LOAD_FAILLED;
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}
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return LOAD_SUCCEEDED;
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}
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void
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ShutdownLoadForeign(void)
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{
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}
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Int
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ReLoadForeign(StringList ofiles, StringList libs,
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char *proc_name, YapInitProc *init_proc)
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{
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return(LoadForeign(ofiles,libs, proc_name, init_proc));
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}
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#endif
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