WebSVN – HelenOS – Diff – /trunk/uspace/srv/loader/main.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 loader
 * @brief Loads and runs programs from VFS.
 * @{
 */
/**
 * @file
 * @brief Loads and runs programs from VFS.
 *
 * The program loader is a special init binary. Its image is used
 * to create a new task upon a @c task_spawn syscall. The syscall
 * returns the id of a phone connected to the newly created task.
 *
 * The caller uses this phone to send the pathname and various other
 * information to the loader. This is normally done by the C library
 * and completely hidden from applications.
 */
 
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <bool.h>
#include <fcntl.h>
#include <sys/types.h>
#include <ipc/ipc.h>
#include <ipc/services.h>
#include <ipc/loader.h>
#include <loader/pcb.h>
#include <console.h>
#include <errno.h>
#include <async.h>
#include <as.h>
 
#include <elf.h>
#include <elf_load.h>
 
#define DPRINTF(...)
 
/** Pathname of the file that will be loaded */
static char *pathname = NULL;
 
/** The Program control block */
static pcb_t pcb;
 
/** Number of arguments */
static int argc = 0;
/** Argument vector */
static char **argv = NULL;
/** Buffer holding all arguments */
static char *arg_buf = NULL;
 
static elf_info_t prog_info;
static elf_info_t interp_info;
 
static bool is_dyn_linked;
 
/** Used to limit number of connections to one. */
static bool connected;
 
static void loader_get_taskid(ipc_callid_t rid, ipc_call_t *request)
{
    ipc_callid_t callid;
    task_id_t task_id;
    size_t len;
   
    task_id = task_get_id();
   
    if (!ipc_data_read_receive(&callid, &len)) {
        ipc_answer_0(callid, EINVAL);
        ipc_answer_0(rid, EINVAL);
        return;
    }
   
    if (len > sizeof(task_id))
        len = sizeof(task_id);
   
    ipc_data_read_finalize(callid, &task_id, len);
    ipc_answer_0(rid, EOK);
}
 
 
/** Receive a call setting pathname of the program to execute.
 *
 * @param rid
 * @param request
 */
static void loader_set_pathname(ipc_callid_t rid, ipc_call_t *request)
{
    ipc_callid_t callid;
    size_t len;
    char *name_buf;
   
    if (!ipc_data_write_receive(&callid, &len)) {
        ipc_answer_0(callid, EINVAL);
        ipc_answer_0(rid, EINVAL);
        return;
    }
   
    name_buf = malloc(len + 1);
    if (!name_buf) {
        ipc_answer_0(callid, ENOMEM);
        ipc_answer_0(rid, ENOMEM);
        return;
    }
   
    ipc_data_write_finalize(callid, name_buf, len);
    ipc_answer_0(rid, EOK);
   
    if (pathname != NULL) {
        free(pathname);
        pathname = NULL;
    }
   
    name_buf[len] = '\0';
    pathname = name_buf;
}
 
/** Receive a call setting arguments of the program to execute.
 *
 * @param rid
 * @param request
 */
static void loader_set_args(ipc_callid_t rid, ipc_call_t *request)
{
    ipc_callid_t callid;
    size_t buf_len, arg_len;
    char *p;
    int n;
   
    if (!ipc_data_write_receive(&callid, &buf_len)) {
        ipc_answer_0(callid, EINVAL);
        ipc_answer_0(rid, EINVAL);
        return;
    }
   
    if (arg_buf != NULL) {
        free(arg_buf);
        arg_buf = NULL;
    }
   
    if (argv != NULL) {
        free(argv);
        argv = NULL;
    }
   
    arg_buf = malloc(buf_len + 1);
    if (!arg_buf) {
        ipc_answer_0(callid, ENOMEM);
        ipc_answer_0(rid, ENOMEM);
        return;
    }
   
    ipc_data_write_finalize(callid, arg_buf, buf_len);
    ipc_answer_0(rid, EOK);
   
    arg_buf[buf_len] = '\0';
   
    /*
     * Count number of arguments
     */
    p = arg_buf;
    n = 0;
    while (p < arg_buf + buf_len) {
        arg_len = strlen(p);
        p = p + arg_len + 1;
        ++n;
    }
   
    /* Allocate argv */
    argv = malloc((n + 1) * sizeof(char *));
   
    if (argv == NULL) {
        free(arg_buf);
        ipc_answer_0(callid, ENOMEM);
        ipc_answer_0(rid, ENOMEM);
        return;
    }
   
    /*
     * Fill argv with argument pointers
     */
    p = arg_buf;
    n = 0;
    while (p < arg_buf + buf_len) {
        argv[n] = p;
       
        arg_len = strlen(p);
        p = p + arg_len + 1;
        ++n;
    }
   
    argc = n;
    argv[n] = NULL;
}
 
/** Load the previously selected program.
 *
 * @param rid
 * @param request
 * @return 0 on success, !0 on error.
 */
static int loader_load(ipc_callid_t rid, ipc_call_t *request)
{
    int rc;
   
    rc = elf_load_file(pathname, 0, &prog_info);
    if (rc < 0) {
        DPRINTF("Failed to load executable '%s'.\n", pathname);
        ipc_answer_0(rid, EINVAL);
        return 1;
    }
   
    elf_create_pcb(&prog_info, &pcb);
   
    pcb.argc = argc;
    pcb.argv = argv;
   
    if (prog_info.interp == NULL) {
        /* Statically linked program */
        is_dyn_linked = false;
        ipc_answer_0(rid, EOK);
        return 0;
    }
   
    rc = elf_load_file(prog_info.interp, 0, &interp_info);
    if (rc < 0) {
        DPRINTF("Failed to load interpreter '%s.'\n",
            prog_info.interp);
        ipc_answer_0(rid, EINVAL);
        return 1;
    }
   
    is_dyn_linked = true;
    ipc_answer_0(rid, EOK);
   
    return 0;
}
 
 
/** Run the previously loaded program.
 *
 * @param rid
 * @param request
 * @return 0 on success, !0 on error.
 */
static void loader_run(ipc_callid_t rid, ipc_call_t *request)
{
    const char *cp;
   
    /* Set the task name. */
    cp = strrchr(pathname, '/');
    cp = (cp == NULL) ? pathname : (cp + 1);
    task_set_name(cp);
   
    if (is_dyn_linked == true) {
        /* Dynamically linked program */
        DPRINTF("Run ELF interpreter.\n");
        DPRINTF("Entry point: 0x%lx\n", interp_info.entry);
        console_close();
       
        ipc_answer_0(rid, EOK);
        elf_run(&interp_info, &pcb);
    } else {
        /* Statically linked program */
        console_close();
        ipc_answer_0(rid, EOK);
        elf_run(&prog_info, &pcb);
    }
 
    /* Not reached */
}
 
/** Handle loader connection.
 *
 * Receive and carry out commands (of which the last one should be
 * to execute the loaded program).
 */
static void loader_connection(ipc_callid_t iid, ipc_call_t *icall)
{
    ipc_callid_t callid;
    ipc_call_t call;
    int retval;
   
    /* Already have a connection? */
    if (connected) {
        ipc_answer_0(iid, ELIMIT);
        return;
    }
   
    connected = true;
   
    /* Accept the connection */
    ipc_answer_0(iid, EOK);
   
    /* Ignore parameters, the connection is already open */
    (void) iid;
    (void) icall;
   
    while (1) {
        callid = async_get_call(&call);
       
        switch (IPC_GET_METHOD(call)) {
        case IPC_M_PHONE_HUNGUP:
            exit(0);
        case LOADER_GET_TASKID:
            loader_get_taskid(callid, &call);
            continue;
        case LOADER_SET_PATHNAME:
            loader_set_pathname(callid, &call);
            continue;
        case LOADER_SET_ARGS:
            loader_set_args(callid, &call);
            continue;
        case LOADER_LOAD:
            loader_load(callid, &call);
            continue;
        case LOADER_RUN:
            loader_run(callid, &call);
            /* Not reached */
        default:
            retval = ENOENT;
            break;
        }
        if ((callid & IPC_CALLID_NOTIFICATION) == 0 &&
            IPC_GET_METHOD(call) != IPC_M_PHONE_HUNGUP) {
            DPRINTF("Responding EINVAL to method %d.\n",
                IPC_GET_METHOD(call));
            ipc_answer_0(callid, EINVAL);
        }
    }
}
 
/** Program loader main function.
 */
int main(int argc, char *argv[])
{
    ipcarg_t phonead;
   
    connected = false;
   
    /* Set a handler of incomming connections. */
    async_set_client_connection(loader_connection);
   
    /* Register at naming service. */
    if (ipc_connect_to_me(PHONE_NS, SERVICE_LOAD, 0, 0, &phonead) != 0)
        return -1;
   
    async_manager();
   
    /* Never reached */
    return 0;
}
 
/** @}
 */
 

Rev 4014	Rev 4154
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 loader	29	/** @addtogroup loader
30	* @brief Loads and runs programs from VFS.	30	* @brief Loads and runs programs from VFS.
31	* @{	31	* @{
32	*/	32	*/
33	/**	33	/**
34	* @file	34	* @file
35	* @brief Loads and runs programs from VFS.	35	* @brief Loads and runs programs from VFS.
36	*	36	*
37	* The program loader is a special init binary. Its image is used	37	* The program loader is a special init binary. Its image is used
38	* to create a new task upon a @c task_spawn syscall. The syscall	38	* to create a new task upon a @c task_spawn syscall. The syscall
39	* returns the id of a phone connected to the newly created task.	39	* returns the id of a phone connected to the newly created task.
40	*	40	*
41	* The caller uses this phone to send the pathname and various other	41	* The caller uses this phone to send the pathname and various other
42	* information to the loader. This is normally done by the C library	42	* information to the loader. This is normally done by the C library
43	* and completely hidden from applications.	43	* and completely hidden from applications.
44	*/	44	*/
45		45
46	#include <stdio.h>	46	#include <stdio.h>
47	#include <stdlib.h>	47	#include <stdlib.h>
48	#include <unistd.h>	48	#include <unistd.h>
49	#include <bool.h>	49	#include <bool.h>
50	#include <fcntl.h>	50	#include <fcntl.h>
51	#include <sys/types.h>	51	#include <sys/types.h>
52	#include <ipc/ipc.h>	52	#include <ipc/ipc.h>
53	#include <ipc/services.h>	53	#include <ipc/services.h>
54	#include <ipc/loader.h>	54	#include <ipc/loader.h>
55	#include <loader/pcb.h>	55	#include <loader/pcb.h>
-		56	#include <console.h>
56	#include <errno.h>	57	#include <errno.h>
57	#include <async.h>	58	#include <async.h>
58	#include <as.h>	59	#include <as.h>
59		60
60	#include <elf.h>	61	#include <elf.h>
61	#include <elf_load.h>	62	#include <elf_load.h>
62		63
63	#define DPRINTF(...)	64	#define DPRINTF(...)
64		65
65	/** Pathname of the file that will be loaded */	66	/** Pathname of the file that will be loaded */
66	static char *pathname = NULL;	67	static char *pathname = NULL;
67		68
68	/** The Program control block */	69	/** The Program control block */
69	static pcb_t pcb;	70	static pcb_t pcb;
70		71
71	/** Number of arguments */	72	/** Number of arguments */
72	static int argc = 0;	73	static int argc = 0;
73	/** Argument vector */	74	/** Argument vector */
74	static char **argv = NULL;	75	static char **argv = NULL;
75	/** Buffer holding all arguments */	76	/** Buffer holding all arguments */
76	static char *arg_buf = NULL;	77	static char *arg_buf = NULL;
77		78
78	static elf_info_t prog_info;	79	static elf_info_t prog_info;
79	static elf_info_t interp_info;	80	static elf_info_t interp_info;
80		81
81	static bool is_dyn_linked;	82	static bool is_dyn_linked;
82		83
83	/** Used to limit number of connections to one. */	84	/** Used to limit number of connections to one. */
84	static bool connected;	85	static bool connected;
85		86
86	static void loader_get_taskid(ipc_callid_t rid, ipc_call_t *request)	87	static void loader_get_taskid(ipc_callid_t rid, ipc_call_t *request)
87	{	88	{
88	ipc_callid_t callid;	89	ipc_callid_t callid;
89	task_id_t task_id;	90	task_id_t task_id;
90	size_t len;	91	size_t len;
91		92
92	task_id = task_get_id();	93	task_id = task_get_id();
93		94
94	if (!ipc_data_read_receive(&callid, &len)) {	95	if (!ipc_data_read_receive(&callid, &len)) {
95	ipc_answer_0(callid, EINVAL);	96	ipc_answer_0(callid, EINVAL);
96	ipc_answer_0(rid, EINVAL);	97	ipc_answer_0(rid, EINVAL);
97	return;	98	return;
98	}	99	}
99		100
100	if (len > sizeof(task_id))	101	if (len > sizeof(task_id))
101	len = sizeof(task_id);	102	len = sizeof(task_id);
102		103
103	ipc_data_read_finalize(callid, &task_id, len);	104	ipc_data_read_finalize(callid, &task_id, len);
104	ipc_answer_0(rid, EOK);	105	ipc_answer_0(rid, EOK);
105	}	106	}
106		107
107		108
108	/** Receive a call setting pathname of the program to execute.	109	/** Receive a call setting pathname of the program to execute.
109	*	110	*
110	* @param rid	111	* @param rid
111	* @param request	112	* @param request
112	*/	113	*/
113	static void loader_set_pathname(ipc_callid_t rid, ipc_call_t *request)	114	static void loader_set_pathname(ipc_callid_t rid, ipc_call_t *request)
114	{	115	{
115	ipc_callid_t callid;	116	ipc_callid_t callid;
116	size_t len;	117	size_t len;
117	char *name_buf;	118	char *name_buf;
118		119
119	if (!ipc_data_write_receive(&callid, &len)) {	120	if (!ipc_data_write_receive(&callid, &len)) {
120	ipc_answer_0(callid, EINVAL);	121	ipc_answer_0(callid, EINVAL);
121	ipc_answer_0(rid, EINVAL);	122	ipc_answer_0(rid, EINVAL);
122	return;	123	return;
123	}	124	}
124		125
125	name_buf = malloc(len + 1);	126	name_buf = malloc(len + 1);
126	if (!name_buf) {	127	if (!name_buf) {
127	ipc_answer_0(callid, ENOMEM);	128	ipc_answer_0(callid, ENOMEM);
128	ipc_answer_0(rid, ENOMEM);	129	ipc_answer_0(rid, ENOMEM);
129	return;	130	return;
130	}	131	}
131		132
132	ipc_data_write_finalize(callid, name_buf, len);	133	ipc_data_write_finalize(callid, name_buf, len);
133	ipc_answer_0(rid, EOK);	134	ipc_answer_0(rid, EOK);
134		135
135	if (pathname != NULL) {	136	if (pathname != NULL) {
136	free(pathname);	137	free(pathname);
137	pathname = NULL;	138	pathname = NULL;
138	}	139	}
139		140
140	name_buf[len] = '\0';	141	name_buf[len] = '\0';
141	pathname = name_buf;	142	pathname = name_buf;
142	}	143	}
143		144
144	/** Receive a call setting arguments of the program to execute.	145	/** Receive a call setting arguments of the program to execute.
145	*	146	*
146	* @param rid	147	* @param rid
147	* @param request	148	* @param request
148	*/	149	*/
149	static void loader_set_args(ipc_callid_t rid, ipc_call_t *request)	150	static void loader_set_args(ipc_callid_t rid, ipc_call_t *request)
150	{	151	{
151	ipc_callid_t callid;	152	ipc_callid_t callid;
152	size_t buf_len, arg_len;	153	size_t buf_len, arg_len;
153	char *p;	154	char *p;
154	int n;	155	int n;
155		156
156	if (!ipc_data_write_receive(&callid, &buf_len)) {	157	if (!ipc_data_write_receive(&callid, &buf_len)) {
157	ipc_answer_0(callid, EINVAL);	158	ipc_answer_0(callid, EINVAL);
158	ipc_answer_0(rid, EINVAL);	159	ipc_answer_0(rid, EINVAL);
159	return;	160	return;
160	}	161	}
161		162
162	if (arg_buf != NULL) {	163	if (arg_buf != NULL) {
163	free(arg_buf);	164	free(arg_buf);
164	arg_buf = NULL;	165	arg_buf = NULL;
165	}	166	}
166		167
167	if (argv != NULL) {	168	if (argv != NULL) {
168	free(argv);	169	free(argv);
169	argv = NULL;	170	argv = NULL;
170	}	171	}
171		172
172	arg_buf = malloc(buf_len + 1);	173	arg_buf = malloc(buf_len + 1);
173	if (!arg_buf) {	174	if (!arg_buf) {
174	ipc_answer_0(callid, ENOMEM);	175	ipc_answer_0(callid, ENOMEM);
175	ipc_answer_0(rid, ENOMEM);	176	ipc_answer_0(rid, ENOMEM);
176	return;	177	return;
177	}	178	}
178		179
179	ipc_data_write_finalize(callid, arg_buf, buf_len);	180	ipc_data_write_finalize(callid, arg_buf, buf_len);
180	ipc_answer_0(rid, EOK);	181	ipc_answer_0(rid, EOK);
181		182
182	arg_buf[buf_len] = '\0';	183	arg_buf[buf_len] = '\0';
183		184
184	/*	185	/*
185	* Count number of arguments	186	* Count number of arguments
186	*/	187	*/
187	p = arg_buf;	188	p = arg_buf;
188	n = 0;	189	n = 0;
189	while (p < arg_buf + buf_len) {	190	while (p < arg_buf + buf_len) {
190	arg_len = strlen(p);	191	arg_len = strlen(p);
191	p = p + arg_len + 1;	192	p = p + arg_len + 1;
192	++n;	193	++n;
193	}	194	}
194		195
195	/* Allocate argv */	196	/* Allocate argv */
196	argv = malloc((n + 1) * sizeof(char *));	197	argv = malloc((n + 1) * sizeof(char *));
197		198
198	if (argv == NULL) {	199	if (argv == NULL) {
199	free(arg_buf);	200	free(arg_buf);
200	ipc_answer_0(callid, ENOMEM);	201	ipc_answer_0(callid, ENOMEM);
201	ipc_answer_0(rid, ENOMEM);	202	ipc_answer_0(rid, ENOMEM);
202	return;	203	return;
203	}	204	}
204		205
205	/*	206	/*
206	* Fill argv with argument pointers	207	* Fill argv with argument pointers
207	*/	208	*/
208	p = arg_buf;	209	p = arg_buf;
209	n = 0;	210	n = 0;
210	while (p < arg_buf + buf_len) {	211	while (p < arg_buf + buf_len) {
211	argv[n] = p;	212	argv[n] = p;
212		213
213	arg_len = strlen(p);	214	arg_len = strlen(p);
214	p = p + arg_len + 1;	215	p = p + arg_len + 1;
215	++n;	216	++n;
216	}	217	}
217		218
218	argc = n;	219	argc = n;
219	argv[n] = NULL;	220	argv[n] = NULL;
220	}	221	}
221		222
222	/** Load the previously selected program.	223	/** Load the previously selected program.
223	*	224	*
224	* @param rid	225	* @param rid
225	* @param request	226	* @param request
226	* @return 0 on success, !0 on error.	227	* @return 0 on success, !0 on error.
227	*/	228	*/
228	static int loader_load(ipc_callid_t rid, ipc_call_t *request)	229	static int loader_load(ipc_callid_t rid, ipc_call_t *request)
229	{	230	{
230	int rc;	231	int rc;
231		232
232	rc = elf_load_file(pathname, 0, &prog_info);	233	rc = elf_load_file(pathname, 0, &prog_info);
233	if (rc < 0) {	234	if (rc < 0) {
234	DPRINTF("Failed to load executable '%s'.\n", pathname);	235	DPRINTF("Failed to load executable '%s'.\n", pathname);
235	ipc_answer_0(rid, EINVAL);	236	ipc_answer_0(rid, EINVAL);
236	return 1;	237	return 1;
237	}	238	}
238		239
239	elf_create_pcb(&prog_info, &pcb);	240	elf_create_pcb(&prog_info, &pcb);
240		241
241	pcb.argc = argc;	242	pcb.argc = argc;
242	pcb.argv = argv;	243	pcb.argv = argv;
243		244
244	if (prog_info.interp == NULL) {	245	if (prog_info.interp == NULL) {
245	/* Statically linked program */	246	/* Statically linked program */
246	is_dyn_linked = false;	247	is_dyn_linked = false;
247	ipc_answer_0(rid, EOK);	248	ipc_answer_0(rid, EOK);
248	return 0;	249	return 0;
249	}	250	}
250		251
251	rc = elf_load_file(prog_info.interp, 0, &interp_info);	252	rc = elf_load_file(prog_info.interp, 0, &interp_info);
252	if (rc < 0) {	253	if (rc < 0) {
253	DPRINTF("Failed to load interpreter '%s.'\n",	254	DPRINTF("Failed to load interpreter '%s.'\n",
254	prog_info.interp);	255	prog_info.interp);
255	ipc_answer_0(rid, EINVAL);	256	ipc_answer_0(rid, EINVAL);
256	return 1;	257	return 1;
257	}	258	}
258		259
259	is_dyn_linked = true;	260	is_dyn_linked = true;
260	ipc_answer_0(rid, EOK);	261	ipc_answer_0(rid, EOK);
261		262
262	return 0;	263	return 0;
263	}	264	}
264		265
265		266
266	/** Run the previously loaded program.	267	/** Run the previously loaded program.
267	*	268	*
268	* @param rid	269	* @param rid
269	* @param request	270	* @param request
270	* @return 0 on success, !0 on error.	271	* @return 0 on success, !0 on error.
271	*/	272	*/
272	static void loader_run(ipc_callid_t rid, ipc_call_t *request)	273	static void loader_run(ipc_callid_t rid, ipc_call_t *request)
273	{	274	{
274	const char *cp;	275	const char *cp;
275		276
276	/* Set the task name. */	277	/* Set the task name. */
277	cp = strrchr(pathname, '/');	278	cp = strrchr(pathname, '/');
278	cp = (cp == NULL) ? pathname : (cp + 1);	279	cp = (cp == NULL) ? pathname : (cp + 1);
279	task_set_name(cp);	280	task_set_name(cp);
280		281
281	if (is_dyn_linked == true) {	282	if (is_dyn_linked == true) {
282	/* Dynamically linked program */	283	/* Dynamically linked program */
283	DPRINTF("Run ELF interpreter.\n");	284	DPRINTF("Run ELF interpreter.\n");
284	DPRINTF("Entry point: 0x%lx\n", interp_info.entry);	285	DPRINTF("Entry point: 0x%lx\n", interp_info.entry);
285	close_console();	286	console_close();
286		287
287	ipc_answer_0(rid, EOK);	288	ipc_answer_0(rid, EOK);
288	elf_run(&interp_info, &pcb);	289	elf_run(&interp_info, &pcb);
289	} else {	290	} else {
290	/* Statically linked program */	291	/* Statically linked program */
291	close_console();	292	console_close();
292	ipc_answer_0(rid, EOK);	293	ipc_answer_0(rid, EOK);
293	elf_run(&prog_info, &pcb);	294	elf_run(&prog_info, &pcb);
294	}	295	}
295		296
296	/* Not reached */	297	/* Not reached */
297	}	298	}
298		299
299	/** Handle loader connection.	300	/** Handle loader connection.
300	*	301	*
301	* Receive and carry out commands (of which the last one should be	302	* Receive and carry out commands (of which the last one should be
302	* to execute the loaded program).	303	* to execute the loaded program).
303	*/	304	*/
304	static void loader_connection(ipc_callid_t iid, ipc_call_t *icall)	305	static void loader_connection(ipc_callid_t iid, ipc_call_t *icall)
305	{	306	{
306	ipc_callid_t callid;	307	ipc_callid_t callid;
307	ipc_call_t call;	308	ipc_call_t call;
308	int retval;	309	int retval;
309		310
310	/* Already have a connection? */	311	/* Already have a connection? */
311	if (connected) {	312	if (connected) {
312	ipc_answer_0(iid, ELIMIT);	313	ipc_answer_0(iid, ELIMIT);
313	return;	314	return;
314	}	315	}
315		316
316	connected = true;	317	connected = true;
317		318
318	/* Accept the connection */	319	/* Accept the connection */
319	ipc_answer_0(iid, EOK);	320	ipc_answer_0(iid, EOK);
320		321
321	/* Ignore parameters, the connection is already open */	322	/* Ignore parameters, the connection is already open */
322	(void) iid;	323	(void) iid;
323	(void) icall;	324	(void) icall;
324		325
325	while (1) {	326	while (1) {
326	callid = async_get_call(&call);	327	callid = async_get_call(&call);
327		328
328	switch (IPC_GET_METHOD(call)) {	329	switch (IPC_GET_METHOD(call)) {
329	case IPC_M_PHONE_HUNGUP:	330	case IPC_M_PHONE_HUNGUP:
330	exit(0);	331	exit(0);
331	case LOADER_GET_TASKID:	332	case LOADER_GET_TASKID:
332	loader_get_taskid(callid, &call);	333	loader_get_taskid(callid, &call);
333	continue;	334	continue;
334	case LOADER_SET_PATHNAME:	335	case LOADER_SET_PATHNAME:
335	loader_set_pathname(callid, &call);	336	loader_set_pathname(callid, &call);
336	continue;	337	continue;
337	case LOADER_SET_ARGS:	338	case LOADER_SET_ARGS:
338	loader_set_args(callid, &call);	339	loader_set_args(callid, &call);
339	continue;	340	continue;
340	case LOADER_LOAD:	341	case LOADER_LOAD:
341	loader_load(callid, &call);	342	loader_load(callid, &call);
342	continue;	343	continue;
343	case LOADER_RUN:	344	case LOADER_RUN:
344	loader_run(callid, &call);	345	loader_run(callid, &call);
345	/* Not reached */	346	/* Not reached */
346	default:	347	default:
347	retval = ENOENT;	348	retval = ENOENT;
348	break;	349	break;
349	}	350	}
350	if ((callid & IPC_CALLID_NOTIFICATION) == 0 &&	351	if ((callid & IPC_CALLID_NOTIFICATION) == 0 &&
351	IPC_GET_METHOD(call) != IPC_M_PHONE_HUNGUP) {	352	IPC_GET_METHOD(call) != IPC_M_PHONE_HUNGUP) {
352	DPRINTF("Responding EINVAL to method %d.\n",	353	DPRINTF("Responding EINVAL to method %d.\n",
353	IPC_GET_METHOD(call));	354	IPC_GET_METHOD(call));
354	ipc_answer_0(callid, EINVAL);	355	ipc_answer_0(callid, EINVAL);
355	}	356	}
356	}	357	}
357	}	358	}
358		359
359	/** Program loader main function.	360	/** Program loader main function.
360	*/	361	*/
361	int main(int argc, char *argv[])	362	int main(int argc, char *argv[])
362	{	363	{
363	ipcarg_t phonead;	364	ipcarg_t phonead;
364		365
365	connected = false;	366	connected = false;
366		367
367	/* Set a handler of incomming connections. */	368	/* Set a handler of incomming connections. */
368	async_set_client_connection(loader_connection);	369	async_set_client_connection(loader_connection);
369		370
370	/* Register at naming service. */	371	/* Register at naming service. */
371	if (ipc_connect_to_me(PHONE_NS, SERVICE_LOAD, 0, 0, &phonead) != 0)	372	if (ipc_connect_to_me(PHONE_NS, SERVICE_LOAD, 0, 0, &phonead) != 0)
372	return -1;	373	return -1;
373		374
374	async_manager();	375	async_manager();
375		376
376	/* Never reached */	377	/* Never reached */
377	return 0;	378	return 0;
378	}	379	}
379		380
380	/** @}	381	/** @}
381	*/	382	*/
382		383

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(root)/trunk/uspace/srv/loader/main.c – Rev 4014 → 4154