WebSVN – HelenOS – Diff – /trunk/kernel/generic/src/syscall/syscall.c


/*
 * Copyright (c) 2005 Martin Decky
 * 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 generic
 * @{
 */
 
/**
 * @file
 * @brief   Syscall table and syscall wrappers.
 */
 
#include <syscall/syscall.h>
#include <proc/thread.h>
#include <proc/task.h>
#include <proc/program.h>
#include <mm/as.h>
#include <print.h>
#include <putchar.h>
#include <errno.h>
#include <arch.h>
#include <debug.h>
#include <ipc/sysipc.h>
#include <synch/futex.h>
#include <synch/smc.h>
#include <ddi/ddi.h>
#include <security/cap.h>
#include <syscall/copy.h>
#include <sysinfo/sysinfo.h>
#include <console/console.h>
#include <udebug/udebug.h>
 
/** Print using kernel facility
 *
 * Print to kernel log.
 *
 */
static unative_t sys_klog(int fd, const void * buf, size_t count)
{
    char *data;
    int rc;
 
    if (count > PAGE_SIZE)
        return ELIMIT;
   
    if (count > 0) {
        data = (char *) malloc(count + 1, 0);
        if (!data)
            return ENOMEM;
       
        rc = copy_from_uspace(data, buf, count);
        if (rc) {
            free(data);
            return rc;
        }
        data[count] = 0;
       
        printf("%s", data);
        free(data);
    } else
        klog_update();
   
    return count;
}
 
/** Tell kernel to get keyboard/console access again */
static unative_t sys_debug_enable_console(void)
{
#ifdef CONFIG_KCONSOLE
    grab_console();
    return true;
#else
    return false;
#endif
}
 
/** Tell kernel to relinquish keyboard/console access */
static unative_t sys_debug_disable_console(void)
{
    release_console();
    return true;
}
 
/** Dispatch system call */
unative_t syscall_handler(unative_t a1, unative_t a2, unative_t a3,
    unative_t a4, unative_t a5, unative_t a6, unative_t id)
{
    unative_t rc;
 
#ifdef CONFIG_UDEBUG
    udebug_syscall_event(a1, a2, a3, a4, a5, a6, id, 0, false);
#endif
    if (id < SYSCALL_END) {
        rc = syscall_table[id](a1, a2, a3, a4, a5, a6);
    } else {
        printf("Task %" PRIu64": Unknown syscall %#" PRIxn, TASK->taskid, id);
        task_kill(TASK->taskid);
        thread_exit();
    }
       
    if (THREAD->interrupted)
        thread_exit();
 
#ifdef CONFIG_UDEBUG
    udebug_syscall_event(a1, a2, a3, a4, a5, a6, id, rc, true);
 
    /*
     * Stopping point needed for tasks that only invoke non-blocking
     * system calls.
     */
    udebug_stoppable_begin();
    udebug_stoppable_end();
#endif  
    return rc;
}
 
syshandler_t syscall_table[SYSCALL_END] = {
    (syshandler_t) sys_klog,
    (syshandler_t) sys_tls_set,
   
    /* Thread and task related syscalls. */
    (syshandler_t) sys_thread_create,
    (syshandler_t) sys_thread_exit,
    (syshandler_t) sys_thread_get_id,
   
    (syshandler_t) sys_task_get_id,
    (syshandler_t) sys_program_spawn_loader,
   
    /* Synchronization related syscalls. */
    (syshandler_t) sys_futex_sleep_timeout,
    (syshandler_t) sys_futex_wakeup,
    (syshandler_t) sys_smc_coherence,
   
    /* Address space related syscalls. */
    (syshandler_t) sys_as_area_create,
    (syshandler_t) sys_as_area_resize,
    (syshandler_t) sys_as_area_change_flags,
    (syshandler_t) sys_as_area_destroy,
   
    /* IPC related syscalls. */
    (syshandler_t) sys_ipc_call_sync_fast,
    (syshandler_t) sys_ipc_call_sync_slow,
    (syshandler_t) sys_ipc_call_async_fast,
    (syshandler_t) sys_ipc_call_async_slow,
    (syshandler_t) sys_ipc_answer_fast,
    (syshandler_t) sys_ipc_answer_slow,
    (syshandler_t) sys_ipc_forward_fast,
    (syshandler_t) sys_ipc_forward_slow,
    (syshandler_t) sys_ipc_wait_for_call,
    (syshandler_t) sys_ipc_hangup,
    (syshandler_t) sys_ipc_register_irq,
    (syshandler_t) sys_ipc_unregister_irq,
   
    /* Capabilities related syscalls. */
    (syshandler_t) sys_cap_grant,
    (syshandler_t) sys_cap_revoke,
   
    /* DDI related syscalls. */
    (syshandler_t) sys_physmem_map,
    (syshandler_t) sys_iospace_enable,
    (syshandler_t) sys_preempt_control,
   
    /* Sysinfo syscalls */
    (syshandler_t) sys_sysinfo_valid,
    (syshandler_t) sys_sysinfo_value,
   
    /* Debug calls */
    (syshandler_t) sys_debug_enable_console,
    (syshandler_t) sys_debug_disable_console,
   
    (syshandler_t) sys_ipc_connect_kbox
};
 
/** @}
 */
 

Rev 3842	Rev 3844
1	/*	1	/*
2	* Copyright (c) 2005 Martin Decky	2	* Copyright (c) 2005 Martin Decky
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 generic	29	/** @addtogroup generic
30	* @{	30	* @{
31	*/	31	*/
32		32
33	/**	33	/**
34	* @file	34	* @file
35	* @brief Syscall table and syscall wrappers.	35	* @brief Syscall table and syscall wrappers.
36	*/	36	*/
37		37
38	#include <syscall/syscall.h>	38	#include <syscall/syscall.h>
39	#include <proc/thread.h>	39	#include <proc/thread.h>
40	#include <proc/task.h>	40	#include <proc/task.h>
41	#include <proc/program.h>	41	#include <proc/program.h>
42	#include <mm/as.h>	42	#include <mm/as.h>
43	#include <print.h>	43	#include <print.h>
44	#include <putchar.h>	44	#include <putchar.h>
45	#include <errno.h>	45	#include <errno.h>
46	#include <arch.h>	46	#include <arch.h>
47	#include <debug.h>	47	#include <debug.h>
48	#include <ipc/sysipc.h>	48	#include <ipc/sysipc.h>
49	#include <synch/futex.h>	49	#include <synch/futex.h>
50	#include <synch/smc.h>	50	#include <synch/smc.h>
51	#include <ddi/ddi.h>	51	#include <ddi/ddi.h>
52	#include <security/cap.h>	52	#include <security/cap.h>
53	#include <syscall/copy.h>	53	#include <syscall/copy.h>
54	#include <sysinfo/sysinfo.h>	54	#include <sysinfo/sysinfo.h>
55	#include <console/console.h>	55	#include <console/console.h>
56	#include <udebug/udebug.h>	56	#include <udebug/udebug.h>
57		57
58	/** Print using kernel facility	58	/** Print using kernel facility
59	*	59	*
60	* Print to kernel log.	60	* Print to kernel log.
61	*	61	*
62	*/	62	*/
63	static unative_t sys_klog(int fd, const void * buf, size_t count)	63	static unative_t sys_klog(int fd, const void * buf, size_t count)
64	{	64	{
65	char *data;	65	char *data;
66	int rc;	66	int rc;
67		67
68	if (count > PAGE_SIZE)	68	if (count > PAGE_SIZE)
69	return ELIMIT;	69	return ELIMIT;
70		70
71	if (count > 0) {	71	if (count > 0) {
72	data = (char *) malloc(count + 1, 0);	72	data = (char *) malloc(count + 1, 0);
73	if (!data)	73	if (!data)
74	return ENOMEM;	74	return ENOMEM;
75		75
76	rc = copy_from_uspace(data, buf, count);	76	rc = copy_from_uspace(data, buf, count);
77	if (rc) {	77	if (rc) {
78	free(data);	78	free(data);
79	return rc;	79	return rc;
80	}	80	}
81	data[count] = 0;	81	data[count] = 0;
82		82
83	printf("%s", data);	83	printf("%s", data);
84	free(data);	84	free(data);
85	} else	85	} else
86	klog_update();	86	klog_update();
87		87
88	return count;	88	return count;
89	}	89	}
90		90
91	/** Tell kernel to get keyboard/console access again */	91	/** Tell kernel to get keyboard/console access again */
92	static unative_t sys_debug_enable_console(void)	92	static unative_t sys_debug_enable_console(void)
93	{	93	{
94	#ifdef CONFIG_KCONSOLE	94	#ifdef CONFIG_KCONSOLE
95	arch_grab_console();	95	grab_console();
96	return true;	96	return true;
97	#else	97	#else
98	return false;	98	return false;
99	#endif	99	#endif
100	}	100	}
101		101
-		102	/** Tell kernel to relinquish keyboard/console access */
-		103	static unative_t sys_debug_disable_console(void)
-		104	{
-		105	release_console();
-		106	return true;
-		107	}
-		108
102	/** Dispatch system call */	109	/** Dispatch system call */
103	unative_t syscall_handler(unative_t a1, unative_t a2, unative_t a3,	110	unative_t syscall_handler(unative_t a1, unative_t a2, unative_t a3,
104	unative_t a4, unative_t a5, unative_t a6, unative_t id)	111	unative_t a4, unative_t a5, unative_t a6, unative_t id)
105	{	112	{
106	unative_t rc;	113	unative_t rc;
107		114
108	#ifdef CONFIG_UDEBUG	115	#ifdef CONFIG_UDEBUG
109	udebug_syscall_event(a1, a2, a3, a4, a5, a6, id, 0, false);	116	udebug_syscall_event(a1, a2, a3, a4, a5, a6, id, 0, false);
110	#endif	117	#endif
111	if (id < SYSCALL_END) {	118	if (id < SYSCALL_END) {
112	rc = syscall_table[id](a1, a2, a3, a4, a5, a6);	119	rc = syscall_table[id](a1, a2, a3, a4, a5, a6);
113	} else {	120	} else {
114	printf("Task %" PRIu64": Unknown syscall %#" PRIxn, TASK->taskid, id);	121	printf("Task %" PRIu64": Unknown syscall %#" PRIxn, TASK->taskid, id);
115	task_kill(TASK->taskid);	122	task_kill(TASK->taskid);
116	thread_exit();	123	thread_exit();
117	}	124	}
118		125
119	if (THREAD->interrupted)	126	if (THREAD->interrupted)
120	thread_exit();	127	thread_exit();
121		128
122	#ifdef CONFIG_UDEBUG	129	#ifdef CONFIG_UDEBUG
123	udebug_syscall_event(a1, a2, a3, a4, a5, a6, id, rc, true);	130	udebug_syscall_event(a1, a2, a3, a4, a5, a6, id, rc, true);
124		131
125	/*	132	/*
126	* Stopping point needed for tasks that only invoke non-blocking	133	* Stopping point needed for tasks that only invoke non-blocking
127	* system calls.	134	* system calls.
128	*/	135	*/
129	udebug_stoppable_begin();	136	udebug_stoppable_begin();
130	udebug_stoppable_end();	137	udebug_stoppable_end();
131	#endif	138	#endif
132	return rc;	139	return rc;
133	}	140	}
134		141
135	syshandler_t syscall_table[SYSCALL_END] = {	142	syshandler_t syscall_table[SYSCALL_END] = {
136	(syshandler_t) sys_klog,	143	(syshandler_t) sys_klog,
137	(syshandler_t) sys_tls_set,	144	(syshandler_t) sys_tls_set,
138		145
139	/* Thread and task related syscalls. */	146	/* Thread and task related syscalls. */
140	(syshandler_t) sys_thread_create,	147	(syshandler_t) sys_thread_create,
141	(syshandler_t) sys_thread_exit,	148	(syshandler_t) sys_thread_exit,
142	(syshandler_t) sys_thread_get_id,	149	(syshandler_t) sys_thread_get_id,
143		150
144	(syshandler_t) sys_task_get_id,	151	(syshandler_t) sys_task_get_id,
145	(syshandler_t) sys_program_spawn_loader,	152	(syshandler_t) sys_program_spawn_loader,
146		153
147	/* Synchronization related syscalls. */	154	/* Synchronization related syscalls. */
148	(syshandler_t) sys_futex_sleep_timeout,	155	(syshandler_t) sys_futex_sleep_timeout,
149	(syshandler_t) sys_futex_wakeup,	156	(syshandler_t) sys_futex_wakeup,
150	(syshandler_t) sys_smc_coherence,	157	(syshandler_t) sys_smc_coherence,
151		158
152	/* Address space related syscalls. */	159	/* Address space related syscalls. */
153	(syshandler_t) sys_as_area_create,	160	(syshandler_t) sys_as_area_create,
154	(syshandler_t) sys_as_area_resize,	161	(syshandler_t) sys_as_area_resize,
155	(syshandler_t) sys_as_area_change_flags,	162	(syshandler_t) sys_as_area_change_flags,
156	(syshandler_t) sys_as_area_destroy,	163	(syshandler_t) sys_as_area_destroy,
157		164
158	/* IPC related syscalls. */	165	/* IPC related syscalls. */
159	(syshandler_t) sys_ipc_call_sync_fast,	166	(syshandler_t) sys_ipc_call_sync_fast,
160	(syshandler_t) sys_ipc_call_sync_slow,	167	(syshandler_t) sys_ipc_call_sync_slow,
161	(syshandler_t) sys_ipc_call_async_fast,	168	(syshandler_t) sys_ipc_call_async_fast,
162	(syshandler_t) sys_ipc_call_async_slow,	169	(syshandler_t) sys_ipc_call_async_slow,
163	(syshandler_t) sys_ipc_answer_fast,	170	(syshandler_t) sys_ipc_answer_fast,
164	(syshandler_t) sys_ipc_answer_slow,	171	(syshandler_t) sys_ipc_answer_slow,
165	(syshandler_t) sys_ipc_forward_fast,	172	(syshandler_t) sys_ipc_forward_fast,
166	(syshandler_t) sys_ipc_forward_slow,	173	(syshandler_t) sys_ipc_forward_slow,
167	(syshandler_t) sys_ipc_wait_for_call,	174	(syshandler_t) sys_ipc_wait_for_call,
168	(syshandler_t) sys_ipc_hangup,	175	(syshandler_t) sys_ipc_hangup,
169	(syshandler_t) sys_ipc_register_irq,	176	(syshandler_t) sys_ipc_register_irq,
170	(syshandler_t) sys_ipc_unregister_irq,	177	(syshandler_t) sys_ipc_unregister_irq,
171		178
172	/* Capabilities related syscalls. */	179	/* Capabilities related syscalls. */
173	(syshandler_t) sys_cap_grant,	180	(syshandler_t) sys_cap_grant,
174	(syshandler_t) sys_cap_revoke,	181	(syshandler_t) sys_cap_revoke,
175		182
176	/* DDI related syscalls. */	183	/* DDI related syscalls. */
177	(syshandler_t) sys_physmem_map,	184	(syshandler_t) sys_physmem_map,
178	(syshandler_t) sys_iospace_enable,	185	(syshandler_t) sys_iospace_enable,
179	(syshandler_t) sys_preempt_control,	186	(syshandler_t) sys_preempt_control,
180		187
181	/* Sysinfo syscalls */	188	/* Sysinfo syscalls */
182	(syshandler_t) sys_sysinfo_valid,	189	(syshandler_t) sys_sysinfo_valid,
183	(syshandler_t) sys_sysinfo_value,	190	(syshandler_t) sys_sysinfo_value,
184		191
185	/* Debug calls */	192	/* Debug calls */
186	(syshandler_t) sys_debug_enable_console,	193	(syshandler_t) sys_debug_enable_console,
-		194	(syshandler_t) sys_debug_disable_console,
187		195
188	(syshandler_t) sys_ipc_connect_kbox	196	(syshandler_t) sys_ipc_connect_kbox
189	};	197	};
190		198
191	/** @}	199	/** @}
192	*/	200	*/
193		201

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(root)/trunk/kernel/generic/src/syscall/syscall.c – Rev 3842 → 3844