Subversion Repositories HelenOS

Rev

Rev 3689 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
3686 svoboda 1
/*
2
 * Copyright (c) 2008 Jiri Svoboda
3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
14
 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
29
/** @addtogroup rtld rtld
30
 * @brief
31
 * @{
32
 */
33
/**
34
 * @file
35
 */
36
 
37
#include <stdio.h>
38
#include <stdlib.h>
39
#include <dlfcn.h>
40
 
41
/* From librtld. */
42
#include <module.h>
43
#include <symbol.h>
44
 
45
void *dlopen(const char *path, int flag)
46
{
47
    module_t *m;
48
 
3869 svoboda 49
    if (runtime_env == NULL) {
50
        printf("Dynamic linker not set up -- initializing.\n");
51
        rtld_init_static();
52
    }
53
 
3686 svoboda 54
    printf("dlopen(\"%s\", %d)\n", path, flag);
55
 
56
    printf("module_find('%s')\n", path);
57
    m = module_find(path);
58
    if (m == NULL) {
59
        printf("NULL. module_load('%s')\n", path);
60
        m = module_load(path);
61
        printf("module_load_deps(m)\n");
62
        module_load_deps(m);
3689 svoboda 63
        /* Now relocate. */
64
        printf("module_process_relocs(m)\n");
65
        module_process_relocs(m);
3686 svoboda 66
    } else {
67
        printf("not NULL\n");
68
    }
69
 
70
    return (void *) m;
71
}
72
 
73
/*
74
 * @note Symbols with NULL values are not accounted for.
75
 */
76
void *dlsym(void *mod, const char *sym_name)
77
{
78
    elf_symbol_t *sd;
79
    module_t *sm;
80
 
81
    printf("dlsym(0x%lx, \"%s\")\n", (long)mod, sym_name);
3689 svoboda 82
    sd = symbol_bfs_find(sym_name, (module_t *) mod, &sm);
3686 svoboda 83
    if (sd != NULL) {
84
        return symbol_get_addr(sd, sm);
85
    }
86
 
87
    return NULL;
88
}
89
 
90
/** @}
91
 */