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/**************************************************************************/
/* */
/* OCaml */
/* */
/* Alain Frisch, projet Gallium, INRIA Rocquencourt */
/* */
/* Copyright 2007 Institut National de Recherche en Informatique et */
/* en Automatique. */
/* */
/* All rights reserved. This file is distributed under the terms of */
/* the GNU Lesser General Public License version 2.1, with the */
/* special exception on linking described in the file LICENSE. */
/* */
/**************************************************************************/
#include "caml/misc.h"
#include "caml/mlvalues.h"
#include "caml/memory.h"
#include "stack.h"
#include "caml/callback.h"
#include "caml/alloc.h"
#include "caml/intext.h"
#include "caml/osdeps.h"
#include "caml/fail.h"
#include "caml/signals.h"
#include <stdio.h>
#include <string.h>
static void *getsym(void *handle, char *module, char *name){
char *fullname = caml_strconcat(3, "caml", module, name);
void *sym;
sym = caml_dlsym (handle, fullname);
/* printf("%s => %lx\n", fullname, (uintnat) sym); */
caml_stat_free(fullname);
return sym;
}
extern char caml_globals_map[];
CAMLprim value caml_natdynlink_getmap(value unit)
{
return (value)caml_globals_map;
}
CAMLprim value caml_natdynlink_globals_inited(value unit)
{
return Val_int(caml_globals_inited);
}
CAMLprim value caml_natdynlink_open(value filename, value global)
{
CAMLparam1 (filename);
CAMLlocal1 (res);
void *sym;
void *handle;
char *p;
/* TODO: dlclose in case of error... */
p = caml_strdup(String_val(filename));
caml_enter_blocking_section();
handle = caml_dlopen(p, 1, Int_val(global));
caml_leave_blocking_section();
caml_stat_free(p);
if (NULL == handle)
CAMLreturn(caml_copy_string(caml_dlerror()));
sym = caml_dlsym(handle, "caml_plugin_header");
if (NULL == sym)
CAMLreturn(caml_copy_string("not an OCaml plugin"));
res = caml_alloc_tuple(2);
Field(res, 0) = (value) handle;
Field(res, 1) = (value) (sym);
CAMLreturn(res);
}
CAMLprim value caml_natdynlink_run(void *handle, value symbol) {
CAMLparam1 (symbol);
CAMLlocal1 (result);
void *sym,*sym2;
struct code_fragment * cf;
#define optsym(n) getsym(handle,unit,n)
char *unit;
void (*entrypoint)(void);
unit = String_val(symbol);
sym = optsym("__frametable");
if (NULL != sym) caml_register_frametable(sym);
sym = optsym("__gc_roots");
if (NULL != sym) caml_register_dyn_global(sym);
sym = optsym("__data_begin");
sym2 = optsym("__data_end");
if (NULL != sym && NULL != sym2)
caml_page_table_add(In_static_data, sym, sym2);
sym = optsym("__code_begin");
sym2 = optsym("__code_end");
if (NULL != sym && NULL != sym2) {
caml_page_table_add(In_code_area, sym, sym2);
cf = caml_stat_alloc(sizeof(struct code_fragment));
cf->code_start = (char *) sym;
cf->code_end = (char *) sym2;
cf->digest_computed = 0;
caml_ext_table_add(&caml_code_fragments_table, cf);
}
entrypoint = optsym("__entry");
if (NULL != entrypoint) result = caml_callback((value)(&entrypoint), 0);
else result = Val_unit;
#undef optsym
CAMLreturn (result);
}
CAMLprim value caml_natdynlink_run_toplevel(value filename, value symbol)
{
CAMLparam2 (filename, symbol);
CAMLlocal2 (res, v);
void *handle;
char *p;
/* TODO: dlclose in case of error... */
p = caml_strdup(String_val(filename));
caml_enter_blocking_section();
handle = caml_dlopen(p, 1, 1);
caml_leave_blocking_section();
caml_stat_free(p);
if (NULL == handle) {
res = caml_alloc(1,1);
v = caml_copy_string(caml_dlerror());
Store_field(res, 0, v);
} else {
res = caml_alloc(1,0);
v = caml_natdynlink_run(handle, symbol);
Store_field(res, 0, v);
}
CAMLreturn(res);
}
CAMLprim value caml_natdynlink_loadsym(value symbol)
{
CAMLparam1 (symbol);
CAMLlocal1 (sym);
sym = (value) caml_globalsym(String_val(symbol));
if (!sym) caml_failwith(String_val(symbol));
CAMLreturn(sym);
}
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