WebSVN – HelenOS – Diff – /branches/dynload/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 <fcntl.h>
#include <sys/types.h>
#include <ipc/ipc.h>
#include <ipc/loader.h>
#include <loader/pcb.h>
#include <errno.h>
#include <async.h>
#include <as.h>
 
#include <elf.h>
#include <elf_load.h>
 
/**
 * Bias used for loading the dynamic linker. This will be soon replaced
 * by automatic placement.
 */
#define RTLD_BIAS 0x80000
 
/** Pathname of the file that will be loaded */
static char *pathname = NULL;
 
/** The Program control block */
static pcb_t pcb;
 
/** Receive a call setting pathname of the program to execute.
 *
 * @param rid
 * @param request
 */
static void iloader_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;
}
 
/** Load and run the previously selected program.
 *
 * @param rid
 * @param request
 * @return 0 on success, !0 on error.
 */
static int iloader_run(ipc_callid_t rid, ipc_call_t *request)
{
    int rc;
 
    elf_info_t prog_info;
    elf_info_t interp_info;
 
//  printf("Load program '%s'\n", pathname);
 
    rc = elf_load_file(pathname, 0, &prog_info);
    if (rc < 0) {
        printf("failed to load program\n");
        ipc_answer_0(rid, EINVAL);
        return 1;
    }
 
//  printf("Create PCB\n");
    elf_create_pcb(&prog_info, &pcb);
 
    pcb.argc = 0;
    pcb.argv = NULL;
 
    if (prog_info.interp == NULL) {
        /* Statically linked program */
//      printf("Run statically linked program\n");
//      printf("entry point: 0x%llx\n", prog_info.entry);
        ipc_answer_0(rid, EOK);
        close_console();
        elf_run(&prog_info, &pcb);
        return 0;
    }
 
    printf("Load dynamic linker '%s'\n", prog_info.interp);
    rc = elf_load_file("/rtld.so", RTLD_BIAS, &interp_info);
    if (rc < 0) {
        printf("failed to load dynamic linker\n");
        ipc_answer_0(rid, EINVAL);
        return 1;
    }
 
    /*
     * Provide dynamic linker with some useful data
     */
    pcb.rtld_dynamic = interp_info.dynamic;
    pcb.rtld_bias = RTLD_BIAS;
 
    printf("run dynamic linker\n");
    printf("entry point: 0x%llx\n", interp_info.entry);
    close_console();
 
    ipc_answer_0(rid, EOK);
    elf_run(&interp_info, &pcb);
 
    /* Not reached */
    return 0;
}
 
/** 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;
 
    /* Ignore parameters, the connection is already open */
    (void)iid; (void)icall;
 
    while (1) {
        callid = async_get_call(&call);
//      printf("received call from phone %d, method=%d\n",
//          call.in_phone_hash, IPC_GET_METHOD(call));
        switch (IPC_GET_METHOD(call)) {
        case LOADER_SET_PATHNAME:
            iloader_set_pathname(callid, &call);
            continue;
        case LOADER_RUN:
            iloader_run(callid, &call);
            exit(0);
            continue;
        default:
            retval = ENOENT;
            break;
        }
        if ((callid & IPC_CALLID_NOTIFICATION) == 0) {
            printf("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[])
{
    ipc_callid_t callid;
    ipc_call_t call;
    ipcarg_t phone_hash;
 
    /* The first call only communicates the incoming phone hash */
    callid = ipc_wait_for_call(&call);
 
    if (IPC_GET_METHOD(call) != LOADER_HELLO) {
        if (IPC_GET_METHOD(call) != IPC_M_PHONE_HUNGUP)
            ipc_answer_0(callid, EINVAL);
        return 1;
    }
 
    ipc_answer_0(callid, EOK);
    phone_hash = call.in_phone_hash;
 
    /*
     * Up until now async must not be used as it couldn't
     * handle incoming requests. (Which means e.g. printf()
     * cannot be used)
     */
    async_new_connection(phone_hash, 0, NULL, loader_connection);
    async_manager();
 
    /* not reached */
    return 0;
}
 
/** @}
 */
 

Rev 3170	Rev 3171
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 <fcntl.h>	49	#include <fcntl.h>
50	#include <sys/types.h>	50	#include <sys/types.h>
51	#include <ipc/ipc.h>	51	#include <ipc/ipc.h>
52	#include <ipc/loader.h>	52	#include <ipc/loader.h>
53	#include <loader/pcb.h>	53	#include <loader/pcb.h>
54	#include <errno.h>	54	#include <errno.h>
55	#include <async.h>	55	#include <async.h>
56	#include <as.h>	56	#include <as.h>
57		57
58	#include <elf.h>	58	#include <elf.h>
59	#include <elf_load.h>	59	#include <elf_load.h>
60		60
61	/**	61	/**
62	* Bias used for loading the dynamic linker. This will be soon replaced	62	* Bias used for loading the dynamic linker. This will be soon replaced
63	* by automatic placement.	63	* by automatic placement.
64	*/	64	*/
65	#define RTLD_BIAS 0x80000	65	#define RTLD_BIAS 0x80000
66		66
67	/** Pathname of the file that will be loaded */	67	/** Pathname of the file that will be loaded */
68	static char *pathname = NULL;	68	static char *pathname = NULL;
69		69
70	/** The Program control block */	70	/** The Program control block */
71	static pcb_t pcb;	71	static pcb_t pcb;
72		72
73	/** Receive a call setting pathname of the program to execute.	73	/** Receive a call setting pathname of the program to execute.
74	*	74	*
75	* @param rid	75	* @param rid
76	* @param request	76	* @param request
77	*/	77	*/
78	static void iloader_set_pathname(ipc_callid_t rid, ipc_call_t *request)	78	static void iloader_set_pathname(ipc_callid_t rid, ipc_call_t *request)
79	{	79	{
80	ipc_callid_t callid;	80	ipc_callid_t callid;
81	size_t len;	81	size_t len;
82	char *name_buf;	82	char *name_buf;
83		83
84	if (!ipc_data_write_receive(&callid, &len)) {	84	if (!ipc_data_write_receive(&callid, &len)) {
85	ipc_answer_0(callid, EINVAL);	85	ipc_answer_0(callid, EINVAL);
86	ipc_answer_0(rid, EINVAL);	86	ipc_answer_0(rid, EINVAL);
87	return;	87	return;
88	}	88	}
89		89
90	name_buf = malloc(len + 1);	90	name_buf = malloc(len + 1);
91	if (!name_buf) {	91	if (!name_buf) {
92	ipc_answer_0(callid, ENOMEM);	92	ipc_answer_0(callid, ENOMEM);
93	ipc_answer_0(rid, ENOMEM);	93	ipc_answer_0(rid, ENOMEM);
94	return;	94	return;
95	}	95	}
96		96
97	ipc_data_write_finalize(callid, name_buf, len);	97	ipc_data_write_finalize(callid, name_buf, len);
98	ipc_answer_0(rid, EOK);	98	ipc_answer_0(rid, EOK);
99		99
100	if (pathname != NULL) {	100	if (pathname != NULL) {
101	free(pathname);	101	free(pathname);
102	pathname = NULL;	102	pathname = NULL;
103	}	103	}
104		104
105	name_buf[len] = '\0';	105	name_buf[len] = '\0';
106	pathname = name_buf;	106	pathname = name_buf;
107	}	107	}
108		108
109	/** Load and run the previously selected program.	109	/** Load and run the previously selected program.
110	*	110	*
111	* @param rid	111	* @param rid
112	* @param request	112	* @param request
113	* @return 0 on success, !0 on error.	113	* @return 0 on success, !0 on error.
114	*/	114	*/
115	static int iloader_run(ipc_callid_t rid, ipc_call_t *request)	115	static int iloader_run(ipc_callid_t rid, ipc_call_t *request)
116	{	116	{
117	int rc;	117	int rc;
118		118
119	elf_info_t prog_info;	119	elf_info_t prog_info;
120	elf_info_t interp_info;	120	elf_info_t interp_info;
121		121
122	// printf("Load program '%s'\n", pathname);	122	// printf("Load program '%s'\n", pathname);
123		123
124	rc = elf_load_file(pathname, 0, &prog_info);	124	rc = elf_load_file(pathname, 0, &prog_info);
125	if (rc < 0) {	125	if (rc < 0) {
126	printf("failed to load program\n");	126	printf("failed to load program\n");
127	ipc_answer_0(rid, EINVAL);	127	ipc_answer_0(rid, EINVAL);
128	return 1;	128	return 1;
129	}	129	}
130		130
131	// printf("Create PCB\n");	131	// printf("Create PCB\n");
132	elf_create_pcb(&prog_info, &pcb);	132	elf_create_pcb(&prog_info, &pcb);
133		133
-		134	pcb.argc = 0;
-		135	pcb.argv = NULL;
-		136
134	if (prog_info.interp == NULL) {	137	if (prog_info.interp == NULL) {
135	/* Statically linked program */	138	/* Statically linked program */
136	// printf("Run statically linked program\n");	139	// printf("Run statically linked program\n");
137	// printf("entry point: 0x%llx\n", prog_info.entry);	140	// printf("entry point: 0x%llx\n", prog_info.entry);
138	ipc_answer_0(rid, EOK);	141	ipc_answer_0(rid, EOK);
139	close_console();	142	close_console();
140	elf_run(&prog_info, &pcb);	143	elf_run(&prog_info, &pcb);
141	return 0;	144	return 0;
142	}	145	}
143		146
144	printf("Load dynamic linker '%s'\n", prog_info.interp);	147	printf("Load dynamic linker '%s'\n", prog_info.interp);
145	rc = elf_load_file("/rtld.so", RTLD_BIAS, &interp_info);	148	rc = elf_load_file("/rtld.so", RTLD_BIAS, &interp_info);
146	if (rc < 0) {	149	if (rc < 0) {
147	printf("failed to load dynamic linker\n");	150	printf("failed to load dynamic linker\n");
148	ipc_answer_0(rid, EINVAL);	151	ipc_answer_0(rid, EINVAL);
149	return 1;	152	return 1;
150	}	153	}
151		154
152	/*	155	/*
153	* Provide dynamic linker with some useful data	156	* Provide dynamic linker with some useful data
154	*/	157	*/
155	pcb.rtld_dynamic = interp_info.dynamic;	158	pcb.rtld_dynamic = interp_info.dynamic;
156	pcb.rtld_bias = RTLD_BIAS;	159	pcb.rtld_bias = RTLD_BIAS;
157		160
158	printf("run dynamic linker\n");	161	printf("run dynamic linker\n");
159	printf("entry point: 0x%llx\n", interp_info.entry);	162	printf("entry point: 0x%llx\n", interp_info.entry);
160	close_console();	163	close_console();
161		164
162	ipc_answer_0(rid, EOK);	165	ipc_answer_0(rid, EOK);
163	elf_run(&interp_info, &pcb);	166	elf_run(&interp_info, &pcb);
164		167
165	/* Not reached */	168	/* Not reached */
166	return 0;	169	return 0;
167	}	170	}
168		171
169	/** Handle loader connection.	172	/** Handle loader connection.
170	*	173	*
171	* Receive and carry out commands (of which the last one should be	174	* Receive and carry out commands (of which the last one should be
172	* to execute the loaded program).	175	* to execute the loaded program).
173	*/	176	*/
174	static void loader_connection(ipc_callid_t iid, ipc_call_t *icall)	177	static void loader_connection(ipc_callid_t iid, ipc_call_t *icall)
175	{	178	{
176	ipc_callid_t callid;	179	ipc_callid_t callid;
177	ipc_call_t call;	180	ipc_call_t call;
178	int retval;	181	int retval;
179		182
180	/* Ignore parameters, the connection is already open */	183	/* Ignore parameters, the connection is already open */
181	(void)iid; (void)icall;	184	(void)iid; (void)icall;
182		185
183	while (1) {	186	while (1) {
184	callid = async_get_call(&call);	187	callid = async_get_call(&call);
185	// printf("received call from phone %d, method=%d\n",	188	// printf("received call from phone %d, method=%d\n",
186	// call.in_phone_hash, IPC_GET_METHOD(call));	189	// call.in_phone_hash, IPC_GET_METHOD(call));
187	switch (IPC_GET_METHOD(call)) {	190	switch (IPC_GET_METHOD(call)) {
188	case LOADER_SET_PATHNAME:	191	case LOADER_SET_PATHNAME:
189	iloader_set_pathname(callid, &call);	192	iloader_set_pathname(callid, &call);
190	continue;	193	continue;
191	case LOADER_RUN:	194	case LOADER_RUN:
192	iloader_run(callid, &call);	195	iloader_run(callid, &call);
193	exit(0);	196	exit(0);
194	continue;	197	continue;
195	default:	198	default:
196	retval = ENOENT;	199	retval = ENOENT;
197	break;	200	break;
198	}	201	}
199	if ((callid & IPC_CALLID_NOTIFICATION) == 0) {	202	if ((callid & IPC_CALLID_NOTIFICATION) == 0) {
200	printf("responding EINVAL to method %d\n", IPC_GET_METHOD(call));	203	printf("responding EINVAL to method %d\n", IPC_GET_METHOD(call));
201	ipc_answer_0(callid, EINVAL);	204	ipc_answer_0(callid, EINVAL);
202	}	205	}
203	}	206	}
204	}	207	}
205		208
206	/** Program loader main function.	209	/** Program loader main function.
207	*/	210	*/
208	int main(int argc, char *argv[])	211	int main(int argc, char *argv[])
209	{	212	{
210	ipc_callid_t callid;	213	ipc_callid_t callid;
211	ipc_call_t call;	214	ipc_call_t call;
212	ipcarg_t phone_hash;	215	ipcarg_t phone_hash;
213		216
214	/* The first call only communicates the incoming phone hash */	217	/* The first call only communicates the incoming phone hash */
215	callid = ipc_wait_for_call(&call);	218	callid = ipc_wait_for_call(&call);
216		219
217	if (IPC_GET_METHOD(call) != LOADER_HELLO) {	220	if (IPC_GET_METHOD(call) != LOADER_HELLO) {
218	if (IPC_GET_METHOD(call) != IPC_M_PHONE_HUNGUP)	221	if (IPC_GET_METHOD(call) != IPC_M_PHONE_HUNGUP)
219	ipc_answer_0(callid, EINVAL);	222	ipc_answer_0(callid, EINVAL);
220	return 1;	223	return 1;
221	}	224	}
222		225
223	ipc_answer_0(callid, EOK);	226	ipc_answer_0(callid, EOK);
224	phone_hash = call.in_phone_hash;	227	phone_hash = call.in_phone_hash;
225		228
226	/*	229	/*
227	* Up until now async must not be used as it couldn't	230	* Up until now async must not be used as it couldn't
228	* handle incoming requests. (Which means e.g. printf()	231	* handle incoming requests. (Which means e.g. printf()
229	* cannot be used)	232	* cannot be used)
230	*/	233	*/
231	async_new_connection(phone_hash, 0, NULL, loader_connection);	234	async_new_connection(phone_hash, 0, NULL, loader_connection);
232	async_manager();	235	async_manager();
233		236
234	/* not reached */	237	/* not reached */
235	return 0;	238	return 0;
236	}	239	}
237		240
238	/** @}	241	/** @}
239	*/	242	*/
240		243

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(root)/branches/dynload/uspace/srv/loader/main.c @ 4742 – Rev 3170 → 3171