WebSVN – HelenOS – Diff – /branches/dynload/uspace/app/dltest/dltest.c


/*
 * Copyright (c) 2008 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
/** @addtogroup rtld
 * @brief   Test dynamic linking capabilities.
 * @{
 */
/**
 * @file
 */
 
#include <stdio.h>
#include <stdlib.h>
#include <dlfcn.h>
 
static void kputint(unsigned i)
{
//  unsigned dummy;
//  asm volatile (
//      "movl $30, %%eax;"
//      "int $0x30"
//      : "=d" (dummy) /* output - %edx clobbered */
//      : "d" (i) /* input */
//      : "%eax","%ecx" /* all scratch registers clobbered */
//  );
/*
    asm volatile (
        "mr %%r3, %0\n"
        "li %%r9, 32\n"
        "sc\n"
        :
        : "r" (i)
        : "%r3","%r9"
    );
*/
}
 
typedef void (*fptr_t)(void);
 
int main(int argc, char *argv[])
{
    void *a;
    void *s;
    fptr_t fun;
 
    char *lib_name;
    char *sym_name;
 
//  kputint(-1);
    printf("Hello from dltest!\n");
 
    lib_name = "libtest.so.0";
    sym_name = "test_func";
 
    a = dlopen(lib_name, 0);
    if (a != NULL) {
        s = dlsym(a, sym_name);
        printf("symbol '%s' = 0x%lx\n", sym_name, (long) s);
    } else {
        printf("failed to dlopen() library '%s'\n", lib_name);
    }
 
    printf("Run dynamically-resolved function '%s'...\n", sym_name);
    fun = (fptr_t) s;
    (*fun)();
    printf("OK\n");
   
    return 0;
}
 
/** @}
 */
 
 

Rev 3686	Rev 3689
1	/*	1	/*
2	* Copyright (c) 2008 Jiri Svoboda	2	* Copyright (c) 2008 Jiri Svoboda
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	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	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.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	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	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	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	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	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	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.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup rtld	29	/** @addtogroup rtld
30	* @brief Test dynamic linking capabilities.	30	* @brief Test dynamic linking capabilities.
31	* @{	31	* @{
32	*/	32	*/
33	/**	33	/**
34	* @file	34	* @file
35	*/	35	*/
36		36
37	#include <stdio.h>	37	#include <stdio.h>
38	#include <stdlib.h>	38	#include <stdlib.h>
39	#include <dlfcn.h>	39	#include <dlfcn.h>
40		40
41	static void kputint(unsigned i)	41	static void kputint(unsigned i)
42	{	42	{
43	// unsigned dummy;	43	// unsigned dummy;
44	// asm volatile (	44	// asm volatile (
45	// "movl $30, %%eax;"	45	// "movl $30, %%eax;"
46	// "int $0x30"	46	// "int $0x30"
47	// : "=d" (dummy) /* output - %edx clobbered */	47	// : "=d" (dummy) /* output - %edx clobbered */
48	// : "d" (i) /* input */	48	// : "d" (i) /* input */
49	// : "%eax","%ecx" /* all scratch registers clobbered */	49	// : "%eax","%ecx" /* all scratch registers clobbered */
50	// );	50	// );
51	/*	51	/*
52	asm volatile (	52	asm volatile (
53	"mr %%r3, %0\n"	53	"mr %%r3, %0\n"
54	"li %%r9, 32\n"	54	"li %%r9, 32\n"
55	"sc\n"	55	"sc\n"
56	:	56	:
57	: "r" (i)	57	: "r" (i)
58	: "%r3","%r9"	58	: "%r3","%r9"
59	);	59	);
60	*/	60	*/
61	}	61	}
62		62
-		63	typedef void (*fptr_t)(void);
-		64
63	int main(int argc, char *argv[])	65	int main(int argc, char *argv[])
64	{	66	{
65	void *a;	67	void *a;
66	void *s;	68	void *s;
-		69	fptr_t fun;
67		70
68	char *lib_name;	71	char *lib_name;
69	char *sym_name;	72	char *sym_name;
70		73
71	// kputint(-1);	74	// kputint(-1);
72	printf("Hello from dltest!\n");	75	printf("Hello from dltest!\n");
73		76
74	lib_name = "libc.so.0";	77	lib_name = "libtest.so.0";
75	sym_name = "printf";	78	sym_name = "test_func";
76		79
77	a = dlopen(lib_name, 0);	80	a = dlopen(lib_name, 0);
78	if (a != NULL) {	81	if (a != NULL) {
79	s = dlsym(a, sym_name);	82	s = dlsym(a, sym_name);
80	printf("symbol '%s' = 0x%lx\n", sym_name, (long) s);	83	printf("symbol '%s' = 0x%lx\n", sym_name, (long) s);
81	} else {	84	} else {
82	printf("failed to dlopen() library '%s'\n");	85	printf("failed to dlopen() library '%s'\n", lib_name);
83	}	86	}
-		87
-		88	printf("Run dynamically-resolved function '%s'...\n", sym_name);
-		89	fun = (fptr_t) s;
-		90	(*fun)();
-		91	printf("OK\n");
-		92
84	return 0;	93	return 0;
85	}	94	}
86		95
87	/** @}	96	/** @}
88	*/	97	*/
89		98
90		99

Subversion Repositories HelenOS

(root)/branches/dynload/uspace/app/dltest/dltest.c – Rev 3686 → 3689