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 <errno.h>
#include <async.h>
#include <string.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;
 
/** Number of preset files */
static int filc = 0;
/** Preset files vector */
static char **filv = NULL;
/** Buffer holding all preset files */
static fdi_node_t *fil_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 ldr_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 ldr_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 ldr_set_args(ipc_callid_t rid, ipc_call_t *request)
{
    ipc_callid_t callid;
    size_t buf_size, arg_size;
    char *p;
    int n;
   
    if (!ipc_data_write_receive(&callid, &buf_size)) {
        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_size + 1);
    if (!arg_buf) {
        ipc_answer_0(callid, ENOMEM);
        ipc_answer_0(rid, ENOMEM);
        return;
    }
   
    ipc_data_write_finalize(callid, arg_buf, buf_size);
   
    arg_buf[buf_size] = '\0';
   
    /*
     * Count number of arguments
     */
    p = arg_buf;
    n = 0;
    while (p < arg_buf + buf_size) {
        arg_size = str_size(p);
        p = p + arg_size + 1;
        ++n;
    }
   
    /* Allocate argv */
    argv = malloc((n + 1) * sizeof(char *));
   
    if (argv == NULL) {
        free(arg_buf);
        ipc_answer_0(rid, ENOMEM);
        return;
    }
 
    /*
     * Fill argv with argument pointers
     */
    p = arg_buf;
    n = 0;
    while (p < arg_buf + buf_size) {
        argv[n] = p;
       
        arg_size = str_size(p);
        p = p + arg_size + 1;
        ++n;
    }
   
    argc = n;
    argv[n] = NULL;
 
    ipc_answer_0(rid, EOK);
}
 
/** Receive a call setting preset files of the program to execute.
 *
 * @param rid
 * @param request
 */
static void ldr_set_files(ipc_callid_t rid, ipc_call_t *request)
{
    ipc_callid_t callid;
    size_t buf_size;
    if (!ipc_data_write_receive(&callid, &buf_size)) {
        ipc_answer_0(callid, EINVAL);
        ipc_answer_0(rid, EINVAL);
        return;
    }
   
    if ((buf_size % sizeof(fdi_node_t)) != 0) {
        ipc_answer_0(callid, EINVAL);
        ipc_answer_0(rid, EINVAL);
        return;
    }
   
    if (fil_buf != NULL) {
        free(fil_buf);
        fil_buf = NULL;
    }
   
    if (filv != NULL) {
        free(filv);
        filv = NULL;
    }
   
    fil_buf = malloc(buf_size);
    if (!fil_buf) {
        ipc_answer_0(callid, ENOMEM);
        ipc_answer_0(rid, ENOMEM);
        return;
    }
   
    ipc_data_write_finalize(callid, fil_buf, buf_size);
   
    int count = buf_size / sizeof(fdi_node_t);
   
    /* Allocate filvv */
    filv = malloc((count + 1) * sizeof(fdi_node_t *));
   
    if (filv == NULL) {
        free(fil_buf);
        ipc_answer_0(rid, ENOMEM);
        return;
    }
   
    /*
     * Fill filv with argument pointers
     */
    int i;
    for (i = 0; i < count; i++)
        filv[i] = &fil_buf[i];
   
    filc = count;
    filv[count] = NULL;
   
    ipc_answer_0(rid, EOK);
}
 
/** Load the previously selected program.
 *
 * @param rid
 * @param request
 * @return 0 on success, !0 on error.
 */
static int ldr_load(ipc_callid_t rid, ipc_call_t *request)
{
    int rc;
   
    rc = elf_load_file(pathname, 0, &prog_info);
    if (rc != EE_OK) {
        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;
   
    pcb.filc = filc;
    pcb.filv = filv;
   
    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 != EE_OK) {
        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 ldr_run(ipc_callid_t rid, ipc_call_t *request)
{
    const char *cp;
   
    /* Set the task name. */
    cp = str_rchr(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);
       
        ipc_answer_0(rid, EOK);
        elf_run(&interp_info, &pcb);
    } else {
        /* Statically linked program */
        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 ldr_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:
            ldr_get_taskid(callid, &call);
            continue;
        case LOADER_SET_PATHNAME:
            ldr_set_pathname(callid, &call);
            continue;
        case LOADER_SET_ARGS:
            ldr_set_args(callid, &call);
            continue;
        case LOADER_SET_FILES:
            ldr_set_files(callid, &call);
            continue;
        case LOADER_LOAD:
            ldr_load(callid, &call);
            continue;
        case LOADER_RUN:
            ldr_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(ldr_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 4491	Rev 4492
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 <errno.h>	56	#include <errno.h>
57	#include <async.h>	57	#include <async.h>
58	#include <string.h>	58	#include <string.h>
59	#include <as.h>	59	#include <as.h>
60		60
61	#include <elf.h>	61	#include <elf.h>
62	#include <elf_load.h>	62	#include <elf_load.h>
63		63
64	#define DPRINTF(...)	64	#define DPRINTF(...)
65		65
66	/** Pathname of the file that will be loaded */	66	/** Pathname of the file that will be loaded */
67	static char *pathname = NULL;	67	static char *pathname = NULL;
68		68
69	/** The Program control block */	69	/** The Program control block */
70	static pcb_t pcb;	70	static pcb_t pcb;
71		71
72	/** Number of arguments */	72	/** Number of arguments */
73	static int argc = 0;	73	static int argc = 0;
74	/** Argument vector */	74	/** Argument vector */
75	static char **argv = NULL;	75	static char **argv = NULL;
76	/** Buffer holding all arguments */	76	/** Buffer holding all arguments */
77	static char *arg_buf = NULL;	77	static char *arg_buf = NULL;
78		78
79	/** Number of preset files */	79	/** Number of preset files */
80	static int filc = 0;	80	static int filc = 0;
81	/** Preset files vector */	81	/** Preset files vector */
82	static char **filv = NULL;	82	static char **filv = NULL;
83	/** Buffer holding all preset files */	83	/** Buffer holding all preset files */
84	static inode_t *fil_buf = NULL;	84	static fdi_node_t *fil_buf = NULL;
85		85
86	static elf_info_t prog_info;	86	static elf_info_t prog_info;
87	static elf_info_t interp_info;	87	static elf_info_t interp_info;
88		88
89	static bool is_dyn_linked;	89	static bool is_dyn_linked;
90		90
91	/** Used to limit number of connections to one. */	91	/** Used to limit number of connections to one. */
92	static bool connected;	92	static bool connected;
93		93
94	static void ldr_get_taskid(ipc_callid_t rid, ipc_call_t *request)	94	static void ldr_get_taskid(ipc_callid_t rid, ipc_call_t *request)
95	{	95	{
96	ipc_callid_t callid;	96	ipc_callid_t callid;
97	task_id_t task_id;	97	task_id_t task_id;
98	size_t len;	98	size_t len;
99		99
100	task_id = task_get_id();	100	task_id = task_get_id();
101		101
102	if (!ipc_data_read_receive(&callid, &len)) {	102	if (!ipc_data_read_receive(&callid, &len)) {
103	ipc_answer_0(callid, EINVAL);	103	ipc_answer_0(callid, EINVAL);
104	ipc_answer_0(rid, EINVAL);	104	ipc_answer_0(rid, EINVAL);
105	return;	105	return;
106	}	106	}
107		107
108	if (len > sizeof(task_id))	108	if (len > sizeof(task_id))
109	len = sizeof(task_id);	109	len = sizeof(task_id);
110		110
111	ipc_data_read_finalize(callid, &task_id, len);	111	ipc_data_read_finalize(callid, &task_id, len);
112	ipc_answer_0(rid, EOK);	112	ipc_answer_0(rid, EOK);
113	}	113	}
114		114
115		115
116	/** Receive a call setting pathname of the program to execute.	116	/** Receive a call setting pathname of the program to execute.
117	*	117	*
118	* @param rid	118	* @param rid
119	* @param request	119	* @param request
120	*/	120	*/
121	static void ldr_set_pathname(ipc_callid_t rid, ipc_call_t *request)	121	static void ldr_set_pathname(ipc_callid_t rid, ipc_call_t *request)
122	{	122	{
123	ipc_callid_t callid;	123	ipc_callid_t callid;
124	size_t len;	124	size_t len;
125	char *name_buf;	125	char *name_buf;
126		126
127	if (!ipc_data_write_receive(&callid, &len)) {	127	if (!ipc_data_write_receive(&callid, &len)) {
128	ipc_answer_0(callid, EINVAL);	128	ipc_answer_0(callid, EINVAL);
129	ipc_answer_0(rid, EINVAL);	129	ipc_answer_0(rid, EINVAL);
130	return;	130	return;
131	}	131	}
132		132
133	name_buf = malloc(len + 1);	133	name_buf = malloc(len + 1);
134	if (!name_buf) {	134	if (!name_buf) {
135	ipc_answer_0(callid, ENOMEM);	135	ipc_answer_0(callid, ENOMEM);
136	ipc_answer_0(rid, ENOMEM);	136	ipc_answer_0(rid, ENOMEM);
137	return;	137	return;
138	}	138	}
139		139
140	ipc_data_write_finalize(callid, name_buf, len);	140	ipc_data_write_finalize(callid, name_buf, len);
141	ipc_answer_0(rid, EOK);	141	ipc_answer_0(rid, EOK);
142		142
143	if (pathname != NULL) {	143	if (pathname != NULL) {
144	free(pathname);	144	free(pathname);
145	pathname = NULL;	145	pathname = NULL;
146	}	146	}
147		147
148	name_buf[len] = '\0';	148	name_buf[len] = '\0';
149	pathname = name_buf;	149	pathname = name_buf;
150	}	150	}
151		151
152	/** Receive a call setting arguments of the program to execute.	152	/** Receive a call setting arguments of the program to execute.
153	*	153	*
154	* @param rid	154	* @param rid
155	* @param request	155	* @param request
156	*/	156	*/
157	static void ldr_set_args(ipc_callid_t rid, ipc_call_t *request)	157	static void ldr_set_args(ipc_callid_t rid, ipc_call_t *request)
158	{	158	{
159	ipc_callid_t callid;	159	ipc_callid_t callid;
160	size_t buf_size, arg_size;	160	size_t buf_size, arg_size;
161	char *p;	161	char *p;
162	int n;	162	int n;
163		163
164	if (!ipc_data_write_receive(&callid, &buf_size)) {	164	if (!ipc_data_write_receive(&callid, &buf_size)) {
165	ipc_answer_0(callid, EINVAL);	165	ipc_answer_0(callid, EINVAL);
166	ipc_answer_0(rid, EINVAL);	166	ipc_answer_0(rid, EINVAL);
167	return;	167	return;
168	}	168	}
169		169
170	if (arg_buf != NULL) {	170	if (arg_buf != NULL) {
171	free(arg_buf);	171	free(arg_buf);
172	arg_buf = NULL;	172	arg_buf = NULL;
173	}	173	}
174		174
175	if (argv != NULL) {	175	if (argv != NULL) {
176	free(argv);	176	free(argv);
177	argv = NULL;	177	argv = NULL;
178	}	178	}
179		179
180	arg_buf = malloc(buf_size + 1);	180	arg_buf = malloc(buf_size + 1);
181	if (!arg_buf) {	181	if (!arg_buf) {
182	ipc_answer_0(callid, ENOMEM);	182	ipc_answer_0(callid, ENOMEM);
183	ipc_answer_0(rid, ENOMEM);	183	ipc_answer_0(rid, ENOMEM);
184	return;	184	return;
185	}	185	}
186		186
187	ipc_data_write_finalize(callid, arg_buf, buf_size);	187	ipc_data_write_finalize(callid, arg_buf, buf_size);
188		188
189	arg_buf[buf_size] = '\0';	189	arg_buf[buf_size] = '\0';
190		190
191	/*	191	/*
192	* Count number of arguments	192	* Count number of arguments
193	*/	193	*/
194	p = arg_buf;	194	p = arg_buf;
195	n = 0;	195	n = 0;
196	while (p < arg_buf + buf_size) {	196	while (p < arg_buf + buf_size) {
197	arg_size = str_size(p);	197	arg_size = str_size(p);
198	p = p + arg_size + 1;	198	p = p + arg_size + 1;
199	++n;	199	++n;
200	}	200	}
201		201
202	/* Allocate argv */	202	/* Allocate argv */
203	argv = malloc((n + 1) * sizeof(char *));	203	argv = malloc((n + 1) * sizeof(char *));
204		204
205	if (argv == NULL) {	205	if (argv == NULL) {
206	free(arg_buf);	206	free(arg_buf);
207	ipc_answer_0(rid, ENOMEM);	207	ipc_answer_0(rid, ENOMEM);
208	return;	208	return;
209	}	209	}
210		210
211	/*	211	/*
212	* Fill argv with argument pointers	212	* Fill argv with argument pointers
213	*/	213	*/
214	p = arg_buf;	214	p = arg_buf;
215	n = 0;	215	n = 0;
216	while (p < arg_buf + buf_size) {	216	while (p < arg_buf + buf_size) {
217	argv[n] = p;	217	argv[n] = p;
218		218
219	arg_size = str_size(p);	219	arg_size = str_size(p);
220	p = p + arg_size + 1;	220	p = p + arg_size + 1;
221	++n;	221	++n;
222	}	222	}
223		223
224	argc = n;	224	argc = n;
225	argv[n] = NULL;	225	argv[n] = NULL;
226		226
227	ipc_answer_0(rid, EOK);	227	ipc_answer_0(rid, EOK);
228	}	228	}
229		229
230	/** Receive a call setting preset files of the program to execute.	230	/** Receive a call setting preset files of the program to execute.
231	*	231	*
232	* @param rid	232	* @param rid
233	* @param request	233	* @param request
234	*/	234	*/
235	static void ldr_set_files(ipc_callid_t rid, ipc_call_t *request)	235	static void ldr_set_files(ipc_callid_t rid, ipc_call_t *request)
236	{	236	{
237	ipc_callid_t callid;	237	ipc_callid_t callid;
238	size_t buf_size;	238	size_t buf_size;
239	if (!ipc_data_write_receive(&callid, &buf_size)) {	239	if (!ipc_data_write_receive(&callid, &buf_size)) {
240	ipc_answer_0(callid, EINVAL);	240	ipc_answer_0(callid, EINVAL);
241	ipc_answer_0(rid, EINVAL);	241	ipc_answer_0(rid, EINVAL);
242	return;	242	return;
243	}	243	}
244		244
245	if ((buf_size % sizeof(inode_t)) != 0) {	245	if ((buf_size % sizeof(fdi_node_t)) != 0) {
246	ipc_answer_0(callid, EINVAL);	246	ipc_answer_0(callid, EINVAL);
247	ipc_answer_0(rid, EINVAL);	247	ipc_answer_0(rid, EINVAL);
248	return;	248	return;
249	}	249	}
250		250
251	if (fil_buf != NULL) {	251	if (fil_buf != NULL) {
252	free(fil_buf);	252	free(fil_buf);
253	fil_buf = NULL;	253	fil_buf = NULL;
254	}	254	}
255		255
256	if (filv != NULL) {	256	if (filv != NULL) {
257	free(filv);	257	free(filv);
258	filv = NULL;	258	filv = NULL;
259	}	259	}
260		260
261	fil_buf = malloc(buf_size);	261	fil_buf = malloc(buf_size);
262	if (!fil_buf) {	262	if (!fil_buf) {
263	ipc_answer_0(callid, ENOMEM);	263	ipc_answer_0(callid, ENOMEM);
264	ipc_answer_0(rid, ENOMEM);	264	ipc_answer_0(rid, ENOMEM);
265	return;	265	return;
266	}	266	}
267		267
268	ipc_data_write_finalize(callid, fil_buf, buf_size);	268	ipc_data_write_finalize(callid, fil_buf, buf_size);
269		269
270	int count = buf_size / sizeof(inode_t);	270	int count = buf_size / sizeof(fdi_node_t);
271		271
272	/* Allocate filvv */	272	/* Allocate filvv */
273	filv = malloc((count + 1) * sizeof(inode_t *));	273	filv = malloc((count + 1) * sizeof(fdi_node_t *));
274		274
275	if (filv == NULL) {	275	if (filv == NULL) {
276	free(fil_buf);	276	free(fil_buf);
277	ipc_answer_0(rid, ENOMEM);	277	ipc_answer_0(rid, ENOMEM);
278	return;	278	return;
279	}	279	}
280		280
281	/*	281	/*
282	* Fill filv with argument pointers	282	* Fill filv with argument pointers
283	*/	283	*/
284	int i;	284	int i;
285	for (i = 0; i < count; i++)	285	for (i = 0; i < count; i++)
286	filv[i] = &fil_buf[i];	286	filv[i] = &fil_buf[i];
287		287
288	filc = count;	288	filc = count;
289	filv[count] = NULL;	289	filv[count] = NULL;
290		290
291	ipc_answer_0(rid, EOK);	291	ipc_answer_0(rid, EOK);
292	}	292	}
293		293
294	/** Load the previously selected program.	294	/** Load the previously selected program.
295	*	295	*
296	* @param rid	296	* @param rid
297	* @param request	297	* @param request
298	* @return 0 on success, !0 on error.	298	* @return 0 on success, !0 on error.
299	*/	299	*/
300	static int ldr_load(ipc_callid_t rid, ipc_call_t *request)	300	static int ldr_load(ipc_callid_t rid, ipc_call_t *request)
301	{	301	{
302	int rc;	302	int rc;
303		303
304	rc = elf_load_file(pathname, 0, &prog_info);	304	rc = elf_load_file(pathname, 0, &prog_info);
305	if (rc != EE_OK) {	305	if (rc != EE_OK) {
306	DPRINTF("Failed to load executable '%s'.\n", pathname);	306	DPRINTF("Failed to load executable '%s'.\n", pathname);
307	ipc_answer_0(rid, EINVAL);	307	ipc_answer_0(rid, EINVAL);
308	return 1;	308	return 1;
309	}	309	}
310		310
311	elf_create_pcb(&prog_info, &pcb);	311	elf_create_pcb(&prog_info, &pcb);
312		312
313	pcb.argc = argc;	313	pcb.argc = argc;
314	pcb.argv = argv;	314	pcb.argv = argv;
315		315
316	pcb.filc = filc;	316	pcb.filc = filc;
317	pcb.filv = filv;	317	pcb.filv = filv;
318		318
319	if (prog_info.interp == NULL) {	319	if (prog_info.interp == NULL) {
320	/* Statically linked program */	320	/* Statically linked program */
321	is_dyn_linked = false;	321	is_dyn_linked = false;
322	ipc_answer_0(rid, EOK);	322	ipc_answer_0(rid, EOK);
323	return 0;	323	return 0;
324	}	324	}
325		325
326	rc = elf_load_file(prog_info.interp, 0, &interp_info);	326	rc = elf_load_file(prog_info.interp, 0, &interp_info);
327	if (rc != EE_OK) {	327	if (rc != EE_OK) {
328	DPRINTF("Failed to load interpreter '%s.'\n",	328	DPRINTF("Failed to load interpreter '%s.'\n",
329	prog_info.interp);	329	prog_info.interp);
330	ipc_answer_0(rid, EINVAL);	330	ipc_answer_0(rid, EINVAL);
331	return 1;	331	return 1;
332	}	332	}
333		333
334	is_dyn_linked = true;	334	is_dyn_linked = true;
335	ipc_answer_0(rid, EOK);	335	ipc_answer_0(rid, EOK);
336		336
337	return 0;	337	return 0;
338	}	338	}
339		339
340		340
341	/** Run the previously loaded program.	341	/** Run the previously loaded program.
342	*	342	*
343	* @param rid	343	* @param rid
344	* @param request	344	* @param request
345	* @return 0 on success, !0 on error.	345	* @return 0 on success, !0 on error.
346	*/	346	*/
347	static void ldr_run(ipc_callid_t rid, ipc_call_t *request)	347	static void ldr_run(ipc_callid_t rid, ipc_call_t *request)
348	{	348	{
349	const char *cp;	349	const char *cp;
350		350
351	/* Set the task name. */	351	/* Set the task name. */
352	cp = str_rchr(pathname, '/');	352	cp = str_rchr(pathname, '/');
353	cp = (cp == NULL) ? pathname : (cp + 1);	353	cp = (cp == NULL) ? pathname : (cp + 1);
354	task_set_name(cp);	354	task_set_name(cp);
355		355
356	if (is_dyn_linked == true) {	356	if (is_dyn_linked == true) {
357	/* Dynamically linked program */	357	/* Dynamically linked program */
358	DPRINTF("Run ELF interpreter.\n");	358	DPRINTF("Run ELF interpreter.\n");
359	DPRINTF("Entry point: 0x%lx\n", interp_info.entry);	359	DPRINTF("Entry point: 0x%lx\n", interp_info.entry);
360		360
361	ipc_answer_0(rid, EOK);	361	ipc_answer_0(rid, EOK);
362	elf_run(&interp_info, &pcb);	362	elf_run(&interp_info, &pcb);
363	} else {	363	} else {
364	/* Statically linked program */	364	/* Statically linked program */
365	ipc_answer_0(rid, EOK);	365	ipc_answer_0(rid, EOK);
366	elf_run(&prog_info, &pcb);	366	elf_run(&prog_info, &pcb);
367	}	367	}
368		368
369	/* Not reached */	369	/* Not reached */
370	}	370	}
371		371
372	/** Handle loader connection.	372	/** Handle loader connection.
373	*	373	*
374	* Receive and carry out commands (of which the last one should be	374	* Receive and carry out commands (of which the last one should be
375	* to execute the loaded program).	375	* to execute the loaded program).
376	*/	376	*/
377	static void ldr_connection(ipc_callid_t iid, ipc_call_t *icall)	377	static void ldr_connection(ipc_callid_t iid, ipc_call_t *icall)
378	{	378	{
379	ipc_callid_t callid;	379	ipc_callid_t callid;
380	ipc_call_t call;	380	ipc_call_t call;
381	int retval;	381	int retval;
382		382
383	/* Already have a connection? */	383	/* Already have a connection? */
384	if (connected) {	384	if (connected) {
385	ipc_answer_0(iid, ELIMIT);	385	ipc_answer_0(iid, ELIMIT);
386	return;	386	return;
387	}	387	}
388		388
389	connected = true;	389	connected = true;
390		390
391	/* Accept the connection */	391	/* Accept the connection */
392	ipc_answer_0(iid, EOK);	392	ipc_answer_0(iid, EOK);
393		393
394	/* Ignore parameters, the connection is already open */	394	/* Ignore parameters, the connection is already open */
395	(void) iid;	395	(void) iid;
396	(void) icall;	396	(void) icall;
397		397
398	while (1) {	398	while (1) {
399	callid = async_get_call(&call);	399	callid = async_get_call(&call);
400		400
401	switch (IPC_GET_METHOD(call)) {	401	switch (IPC_GET_METHOD(call)) {
402	case IPC_M_PHONE_HUNGUP:	402	case IPC_M_PHONE_HUNGUP:
403	exit(0);	403	exit(0);
404	case LOADER_GET_TASKID:	404	case LOADER_GET_TASKID:
405	ldr_get_taskid(callid, &call);	405	ldr_get_taskid(callid, &call);
406	continue;	406	continue;
407	case LOADER_SET_PATHNAME:	407	case LOADER_SET_PATHNAME:
408	ldr_set_pathname(callid, &call);	408	ldr_set_pathname(callid, &call);
409	continue;	409	continue;
410	case LOADER_SET_ARGS:	410	case LOADER_SET_ARGS:
411	ldr_set_args(callid, &call);	411	ldr_set_args(callid, &call);
412	continue;	412	continue;
413	case LOADER_SET_FILES:	413	case LOADER_SET_FILES:
414	ldr_set_files(callid, &call);	414	ldr_set_files(callid, &call);
415	continue;	415	continue;
416	case LOADER_LOAD:	416	case LOADER_LOAD:
417	ldr_load(callid, &call);	417	ldr_load(callid, &call);
418	continue;	418	continue;
419	case LOADER_RUN:	419	case LOADER_RUN:
420	ldr_run(callid, &call);	420	ldr_run(callid, &call);
421	/* Not reached */	421	/* Not reached */
422	default:	422	default:
423	retval = ENOENT;	423	retval = ENOENT;
424	break;	424	break;
425	}	425	}
426	if ((callid & IPC_CALLID_NOTIFICATION) == 0 &&	426	if ((callid & IPC_CALLID_NOTIFICATION) == 0 &&
427	IPC_GET_METHOD(call) != IPC_M_PHONE_HUNGUP) {	427	IPC_GET_METHOD(call) != IPC_M_PHONE_HUNGUP) {
428	DPRINTF("Responding EINVAL to method %d.\n",	428	DPRINTF("Responding EINVAL to method %d.\n",
429	IPC_GET_METHOD(call));	429	IPC_GET_METHOD(call));
430	ipc_answer_0(callid, EINVAL);	430	ipc_answer_0(callid, EINVAL);
431	}	431	}
432	}	432	}
433	}	433	}
434		434
435	/** Program loader main function.	435	/** Program loader main function.
436	*/	436	*/
437	int main(int argc, char *argv[])	437	int main(int argc, char *argv[])
438	{	438	{
439	ipcarg_t phonead;	439	ipcarg_t phonead;
440		440
441	connected = false;	441	connected = false;
442		442
443	/* Set a handler of incomming connections. */	443	/* Set a handler of incomming connections. */
444	async_set_client_connection(ldr_connection);	444	async_set_client_connection(ldr_connection);
445		445
446	/* Register at naming service. */	446	/* Register at naming service. */
447	if (ipc_connect_to_me(PHONE_NS, SERVICE_LOAD, 0, 0, &phonead) != 0)	447	if (ipc_connect_to_me(PHONE_NS, SERVICE_LOAD, 0, 0, &phonead) != 0)
448	return -1;	448	return -1;
449		449
450	async_manager();	450	async_manager();
451		451
452	/* Never reached */	452	/* Never reached */
453	return 0;	453	return 0;
454	}	454	}
455		455
456	/** @}	456	/** @}
457	*/	457	*/
458		458

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(root)/trunk/uspace/srv/loader/main.c – Rev 4491 → 4492