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 <errno.h>
#include <async.h>
#include <as.h>
 
#include <elf.h>
#include <elf_load.h>
#include <pcb.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;
 
/** 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;
    pcb_t *pcb;
 
    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");
    if (elf_create_pcb(&prog_info) < 0) {
        ipc_answer_0(rid, ENOMEM);
        return 1;
    }
 
    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);
        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 = (pcb_t *)PCB_ADDRESS;
    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);
 
    /* 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;
 
    /*
     * FIXME: up until now no async calls can be used!!!
     * (Which means e.g. printf() cannot be used)
     */
    async_new_connection(phone_hash, 0, NULL, loader_connection);
    async_manager();
 
    /* not reached */
    return 0;
}
 
/** @}
 */
 

Rev 3148	Rev 3155
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 <errno.h>	53	#include <errno.h>
54	#include <async.h>	54	#include <async.h>
55	#include <as.h>	55	#include <as.h>
56		56
57	#include <elf.h>	57	#include <elf.h>
58	#include <elf_load.h>	58	#include <elf_load.h>
59	#include <pcb.h>	59	#include <pcb.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	/** Receive a call setting pathname of the program to execute.	70	/** Receive a call setting pathname of the program to execute.
71	*	71	*
72	* @param rid	72	* @param rid
73	* @param request	73	* @param request
74	*/	74	*/
75	static void iloader_set_pathname(ipc_callid_t rid, ipc_call_t *request)	75	static void iloader_set_pathname(ipc_callid_t rid, ipc_call_t *request)
76	{	76	{
77	ipc_callid_t callid;	77	ipc_callid_t callid;
78	size_t len;	78	size_t len;
79	char *name_buf;	79	char *name_buf;
80		80
81	printf("iloader_set_pathname\n");	-
82	if (!ipc_data_write_receive(&callid, &len)) {	81	if (!ipc_data_write_receive(&callid, &len)) {
83	ipc_answer_0(callid, EINVAL);	82	ipc_answer_0(callid, EINVAL);
84	ipc_answer_0(rid, EINVAL);	83	ipc_answer_0(rid, EINVAL);
85	return;	84	return;
86	}	85	}
87		86
88	printf("alloc %d bytes\n", len+1);	-
89		-
90	name_buf = malloc(len + 1);	87	name_buf = malloc(len + 1);
91	if (!name_buf) {	88	if (!name_buf) {
92	ipc_answer_0(callid, ENOMEM);	89	ipc_answer_0(callid, ENOMEM);
93	ipc_answer_0(rid, ENOMEM);	90	ipc_answer_0(rid, ENOMEM);
94	return;	91	return;
95	}	92	}
96		93
97	printf("write_finalize\n");	-
98	ipc_data_write_finalize(callid, name_buf, len);	94	ipc_data_write_finalize(callid, name_buf, len);
99	printf("answer\n");	-
100	ipc_answer_0(rid, EOK);	95	ipc_answer_0(rid, EOK);
101		96
102	if (pathname != NULL) {	97	if (pathname != NULL) {
103	free(pathname);	98	free(pathname);
104	pathname = NULL;	99	pathname = NULL;
105	}	100	}
106		101
107	name_buf[len] = '\0';	102	name_buf[len] = '\0';
108	pathname = name_buf;	103	pathname = name_buf;
109	}	104	}
110		105
111	/** Load and run the previously selected program.	106	/** Load and run the previously selected program.
112	*	107	*
113	* @param rid	108	* @param rid
114	* @param request	109	* @param request
115	* @return 0 on success, !0 on error.	110	* @return 0 on success, !0 on error.
116	*/	111	*/
117	static int iloader_run(ipc_callid_t rid, ipc_call_t *request)	112	static int iloader_run(ipc_callid_t rid, ipc_call_t *request)
118	{	113	{
119	int rc;	114	int rc;
120	pcb_t *pcb;	115	pcb_t *pcb;
121		116
122	elf_info_t prog_info;	117	elf_info_t prog_info;
123	elf_info_t interp_info;	118	elf_info_t interp_info;
124		119
125	printf("Load program '%s'\n", pathname);	120	// printf("Load program '%s'\n", pathname);
126		121
127	rc = elf_load_file(pathname, 0, &prog_info);	122	rc = elf_load_file(pathname, 0, &prog_info);
128	if (rc < 0) {	123	if (rc < 0) {
129	printf("failed to load program\n");	124	printf("failed to load program\n");
-		125	ipc_answer_0(rid, EINVAL);
130	return 1;	126	return 1;
131	}	127	}
132		128
133	printf("Create PCB\n");	129	// printf("Create PCB\n");
134	if (elf_create_pcb(&prog_info) < 0) return 1;	130	if (elf_create_pcb(&prog_info) < 0) {
-		131	ipc_answer_0(rid, ENOMEM);
-		132	return 1;
-		133	}
135		134
136	if (prog_info.interp == NULL) {	135	if (prog_info.interp == NULL) {
137	/* Statically linked program */	136	/* Statically linked program */
138	printf("Run statically linked program\n");	137	// printf("Run statically linked program\n");
-		138	// printf("entry point: 0x%llx\n", prog_info.entry);
-		139	ipc_answer_0(rid, EOK);
-		140	close_console();
139	elf_run(&prog_info);	141	elf_run(&prog_info);
140	return 0;	142	return 0;
141	}	143	}
142		144
143	printf("Load dynamic linker '%s'\n", prog_info.interp);	145	printf("Load dynamic linker '%s'\n", prog_info.interp);
144	rc = elf_load_file("/rtld.so", RTLD_BIAS, &interp_info);	146	rc = elf_load_file("/rtld.so", RTLD_BIAS, &interp_info);
145	if (rc < 0) {	147	if (rc < 0) {
146	printf("failed to load dynamic linker\n");	148	printf("failed to load dynamic linker\n");
-		149	ipc_answer_0(rid, EINVAL);
147	return 1;	150	return 1;
148	}	151	}
149		152
150	/*	153	/*
151	* Provide dynamic linker with some useful data	154	* Provide dynamic linker with some useful data
152	*/	155	*/
153	pcb = (pcb_t *)PCB_ADDRESS;	156	pcb = (pcb_t *)PCB_ADDRESS;
154	pcb->rtld_dynamic = interp_info.dynamic;	157	pcb->rtld_dynamic = interp_info.dynamic;
155	pcb->rtld_bias = RTLD_BIAS;	158	pcb->rtld_bias = RTLD_BIAS;
156		159
157	printf("run dynamic linker\n");	160	printf("run dynamic linker\n");
-		161	printf("entry point: 0x%llx\n", interp_info.entry);
-		162	close_console();
-		163
-		164	ipc_answer_0(rid, EOK);
158	elf_run(&interp_info);	165	elf_run(&interp_info);
159		166
-		167	/* Not reached(?) */
160	return 0;	168	return 0;
161	}	169	}
162		170
163	/** Handle loader connection.	171	/** Handle loader connection.
164	*	172	*
165	* Receive and carry out commands (of which the last one should be	173	* Receive and carry out commands (of which the last one should be
166	* to execute the loaded program).	174	* to execute the loaded program).
167	*/	175	*/
168	static void loader_connection(ipc_callid_t iid, ipc_call_t *icall)	176	static void loader_connection(ipc_callid_t iid, ipc_call_t *icall)
169	{	177	{
170	ipc_callid_t callid;	178	ipc_callid_t callid;
171	ipc_call_t call;	179	ipc_call_t call;
172	int retval;	180	int retval;
173		181
174	/* Ignore parameters, the connection is already open */	182	/* Ignore parameters, the connection is already open */
175	(void)iid; (void)icall;	183	(void)iid; (void)icall;
176		184
177	while (1) {	185	while (1) {
178	callid = async_get_call(&call);	186	callid = async_get_call(&call);
179	printf("received call from phone %d, method=%d\n",	187	// printf("received call from phone %d, method=%d\n",
180	call.in_phone_hash, IPC_GET_METHOD(call));	188	// call.in_phone_hash, IPC_GET_METHOD(call));
181	switch (IPC_GET_METHOD(call)) {	189	switch (IPC_GET_METHOD(call)) {
182	case LOADER_SET_PATHNAME:	190	case LOADER_SET_PATHNAME:
183	iloader_set_pathname(callid, &call);	191	iloader_set_pathname(callid, &call);
184	continue;	192	continue;
185	case LOADER_RUN:	193	case LOADER_RUN:
186	iloader_run(callid, &call);	194	iloader_run(callid, &call);
187	exit(0);	195	exit(0);
188	continue;	196	continue;
189	default:	197	default:
190	retval = ENOENT;	198	retval = ENOENT;
191	break;	199	break;
192	}	200	}
193	if ((callid & IPC_CALLID_NOTIFICATION) == 0) {	201	if ((callid & IPC_CALLID_NOTIFICATION) == 0) {
194	printf("responding EINVAL to method %d\n", IPC_GET_METHOD(call));	202	printf("responding EINVAL to method %d\n", IPC_GET_METHOD(call));
195	ipc_answer_0(callid, EINVAL);	203	ipc_answer_0(callid, EINVAL);
196	}	204	}
197	}	205	}
198	}	206	}
199		207
200	/** Program loader main function.	208	/** Program loader main function.
201	*/	209	*/
202	int main(int argc, char *argv[])	210	int main(int argc, char *argv[])
203	{	211	{
204	ipc_callid_t callid;	212	ipc_callid_t callid;
205	ipc_call_t call;	213	ipc_call_t call;
206	ipcarg_t phone_hash;	214	ipcarg_t phone_hash;
207		215
208	/* The first call only communicates the incoming phone hash */	216	/* The first call only communicates the incoming phone hash */
209	callid = ipc_wait_for_call(&call);	217	callid = ipc_wait_for_call(&call);
210		218
211	if (IPC_GET_METHOD(call) != LOADER_HELLO) {	219	if (IPC_GET_METHOD(call) != LOADER_HELLO) {
212	if (IPC_GET_METHOD(call) != IPC_M_PHONE_HUNGUP)	220	if (IPC_GET_METHOD(call) != IPC_M_PHONE_HUNGUP)
213	ipc_answer_0(callid, EINVAL);	221	ipc_answer_0(callid, EINVAL);
214	return 1;	222	return 1;
215	}	223	}
216		224
217	ipc_answer_0(callid, EOK);	225	ipc_answer_0(callid, EOK);
218	phone_hash = call.in_phone_hash;	226	phone_hash = call.in_phone_hash;
219		227
220	/*	228	/*
221	* FIXME: up until now no async calls can be used!!!	229	* FIXME: up until now no async calls can be used!!!
222	* (Which means e.g. printf() cannot be used)	230	* (Which means e.g. printf() cannot be used)
223	*/	231	*/
224	async_new_connection(phone_hash, 0, NULL, loader_connection);	232	async_new_connection(phone_hash, 0, NULL, loader_connection);
225	async_manager();	233	async_manager();
226		234
227	/* not reached */	235	/* not reached */
228	return 0;	236	return 0;
229	}	237	}
230		238
231	/** @}	239	/** @}
232	*/	240	*/
233		241

Subversion Repositories HelenOS

(root)/branches/dynload/uspace/srv/loader/main.c @ 4349 – Rev 3148 → 3155