WebSVN – HelenOS – Diff – /branches/tracing/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 <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 <ddi/ddi.h>
#include <security/cap.h>
#include <syscall/copy.h>
#include <sysinfo/sysinfo.h>
#include <console/console.h>
#include <console/klog.h>
#include <udebug/udebug.h>
 
/** Print using kernel facility
 *
 * Some simulators can print only through kernel. Userspace can use
 * this syscall to facilitate it.
 */
static unative_t sys_io(int fd, const void * buf, size_t count)
{
    size_t i;
    char *data;
    int rc;
 
    if (count > PAGE_SIZE)
        return ELIMIT;
 
    data = (char *) malloc(count, 0);
    if (!data)
        return ENOMEM;
   
    rc = copy_from_uspace(data, buf, count);
    if (rc) {
        free(data);
        return rc;
    }
 
    for (i = 0; i < count; i++)
        putchar(data[i]);
    free(data);
   
    return count;
}
 
/** Tell kernel to get keyboard/console access again */
static unative_t sys_debug_enable_console(void)
{
    arch_grab_console();
    return 0;
}
 
/** 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;
    istate_t fake_state;
 
    if (id < SYSCALL_END) {
        THREAD->uspace_state = &fake_state;
        udebug_stoppable_begin();
        rc = syscall_table[id](a1, a2, a3, a4, a5, a6);
    } else {
        klog_printf("TASK %llu: Unknown syscall id %llx", TASK->taskid,
            id);
        task_kill(TASK->taskid);
        thread_exit();
    }
       
    if (THREAD->interrupted)
        thread_exit();
 
    udebug_syscall_event(a1, a2, a3, a4, a5, a6, id, rc);
    udebug_stoppable_end();
    THREAD->uspace_state = NULL;
   
    return rc;
}
 
syshandler_t syscall_table[SYSCALL_END] = {
    (syshandler_t) sys_io,
    (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,
   
    /* Synchronization related syscalls. */
    (syshandler_t) sys_futex_sleep_timeout,
    (syshandler_t) sys_futex_wakeup,
   
    /* Address space related syscalls. */
    (syshandler_t) sys_as_area_create,
    (syshandler_t) sys_as_area_resize,
    (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_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_ipc_connect_kbox
};
 
/** @}
 */
 

Rev 2813	Rev 2817
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 <mm/as.h>	41	#include <mm/as.h>
42	#include <print.h>	42	#include <print.h>
43	#include <putchar.h>	43	#include <putchar.h>
44	#include <errno.h>	44	#include <errno.h>
45	#include <arch.h>	45	#include <arch.h>
46	#include <debug.h>	46	#include <debug.h>
47	#include <ipc/sysipc.h>	47	#include <ipc/sysipc.h>
48	#include <synch/futex.h>	48	#include <synch/futex.h>
49	#include <ddi/ddi.h>	49	#include <ddi/ddi.h>
50	#include <security/cap.h>	50	#include <security/cap.h>
51	#include <syscall/copy.h>	51	#include <syscall/copy.h>
52	#include <sysinfo/sysinfo.h>	52	#include <sysinfo/sysinfo.h>
53	#include <console/console.h>	53	#include <console/console.h>
54	#include <console/klog.h>	54	#include <console/klog.h>
55	#include <udebug/udebug.h>	55	#include <udebug/udebug.h>
56		56
57	/** Print using kernel facility	57	/** Print using kernel facility
58	*	58	*
59	* Some simulators can print only through kernel. Userspace can use	59	* Some simulators can print only through kernel. Userspace can use
60	* this syscall to facilitate it.	60	* this syscall to facilitate it.
61	*/	61	*/
62	static unative_t sys_io(int fd, const void * buf, size_t count)	62	static unative_t sys_io(int fd, const void * buf, size_t count)
63	{	63	{
64	size_t i;	64	size_t i;
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	data = (char *) malloc(count, 0);	71	data = (char *) malloc(count, 0);
72	if (!data)	72	if (!data)
73	return ENOMEM;	73	return ENOMEM;
74		74
75	rc = copy_from_uspace(data, buf, count);	75	rc = copy_from_uspace(data, buf, count);
76	if (rc) {	76	if (rc) {
77	free(data);	77	free(data);
78	return rc;	78	return rc;
79	}	79	}
80		80
81	for (i = 0; i < count; i++)	81	for (i = 0; i < count; i++)
82	putchar(data[i]);	82	putchar(data[i]);
83	free(data);	83	free(data);
84		84
85	return count;	85	return count;
86	}	86	}
87		87
88	/** Tell kernel to get keyboard/console access again */	88	/** Tell kernel to get keyboard/console access again */
89	static unative_t sys_debug_enable_console(void)	89	static unative_t sys_debug_enable_console(void)
90	{	90	{
91	arch_grab_console();	91	arch_grab_console();
92	return 0;	92	return 0;
93	}	93	}
94		94
95	/** Dispatch system call */	95	/** Dispatch system call */
96	unative_t syscall_handler(unative_t a1, unative_t a2, unative_t a3,	96	unative_t syscall_handler(unative_t a1, unative_t a2, unative_t a3,
97	unative_t a4, unative_t a5, unative_t a6, unative_t id)	97	unative_t a4, unative_t a5, unative_t a6, unative_t id)
98	{	98	{
99	unative_t rc;	99	unative_t rc;
-		100	istate_t fake_state;
100		101
101	if (id < SYSCALL_END) {	102	if (id < SYSCALL_END) {
-		103	THREAD->uspace_state = &fake_state;
102	udebug_stoppable_begin();	104	udebug_stoppable_begin();
103	rc = syscall_table[id](a1, a2, a3, a4, a5, a6);	105	rc = syscall_table[id](a1, a2, a3, a4, a5, a6);
104	} else {	106	} else {
105	klog_printf("TASK %llu: Unknown syscall id %llx", TASK->taskid,	107	klog_printf("TASK %llu: Unknown syscall id %llx", TASK->taskid,
106	id);	108	id);
107	task_kill(TASK->taskid);	109	task_kill(TASK->taskid);
108	thread_exit();	110	thread_exit();
109	}	111	}
110		112
111	if (THREAD->interrupted)	113	if (THREAD->interrupted)
112	thread_exit();	114	thread_exit();
113		115
114	udebug_syscall_event(a1, a2, a3, a4, a5, a6, id, rc);	116	udebug_syscall_event(a1, a2, a3, a4, a5, a6, id, rc);
115	udebug_stoppable_end();	117	udebug_stoppable_end();
-		118	THREAD->uspace_state = NULL;
116		119
117	return rc;	120	return rc;
118	}	121	}
119		122
120	syshandler_t syscall_table[SYSCALL_END] = {	123	syshandler_t syscall_table[SYSCALL_END] = {
121	(syshandler_t) sys_io,	124	(syshandler_t) sys_io,
122	(syshandler_t) sys_tls_set,	125	(syshandler_t) sys_tls_set,
123		126
124	/* Thread and task related syscalls. */	127	/* Thread and task related syscalls. */
125	(syshandler_t) sys_thread_create,	128	(syshandler_t) sys_thread_create,
126	(syshandler_t) sys_thread_exit,	129	(syshandler_t) sys_thread_exit,
127	(syshandler_t) sys_thread_get_id,	130	(syshandler_t) sys_thread_get_id,
128	(syshandler_t) sys_task_get_id,	131	(syshandler_t) sys_task_get_id,
129		132
130	/* Synchronization related syscalls. */	133	/* Synchronization related syscalls. */
131	(syshandler_t) sys_futex_sleep_timeout,	134	(syshandler_t) sys_futex_sleep_timeout,
132	(syshandler_t) sys_futex_wakeup,	135	(syshandler_t) sys_futex_wakeup,
133		136
134	/* Address space related syscalls. */	137	/* Address space related syscalls. */
135	(syshandler_t) sys_as_area_create,	138	(syshandler_t) sys_as_area_create,
136	(syshandler_t) sys_as_area_resize,	139	(syshandler_t) sys_as_area_resize,
137	(syshandler_t) sys_as_area_destroy,	140	(syshandler_t) sys_as_area_destroy,
138		141
139	/* IPC related syscalls. */	142	/* IPC related syscalls. */
140	(syshandler_t) sys_ipc_call_sync_fast,	143	(syshandler_t) sys_ipc_call_sync_fast,
141	(syshandler_t) sys_ipc_call_sync_slow,	144	(syshandler_t) sys_ipc_call_sync_slow,
142	(syshandler_t) sys_ipc_call_async_fast,	145	(syshandler_t) sys_ipc_call_async_fast,
143	(syshandler_t) sys_ipc_call_async_slow,	146	(syshandler_t) sys_ipc_call_async_slow,
144	(syshandler_t) sys_ipc_answer_fast,	147	(syshandler_t) sys_ipc_answer_fast,
145	(syshandler_t) sys_ipc_answer_slow,	148	(syshandler_t) sys_ipc_answer_slow,
146	(syshandler_t) sys_ipc_forward_fast,	149	(syshandler_t) sys_ipc_forward_fast,
147	(syshandler_t) sys_ipc_wait_for_call,	150	(syshandler_t) sys_ipc_wait_for_call,
148	(syshandler_t) sys_ipc_hangup,	151	(syshandler_t) sys_ipc_hangup,
149	(syshandler_t) sys_ipc_register_irq,	152	(syshandler_t) sys_ipc_register_irq,
150	(syshandler_t) sys_ipc_unregister_irq,	153	(syshandler_t) sys_ipc_unregister_irq,
151		154
152	/* Capabilities related syscalls. */	155	/* Capabilities related syscalls. */
153	(syshandler_t) sys_cap_grant,	156	(syshandler_t) sys_cap_grant,
154	(syshandler_t) sys_cap_revoke,	157	(syshandler_t) sys_cap_revoke,
155		158
156	/* DDI related syscalls. */	159	/* DDI related syscalls. */
157	(syshandler_t) sys_physmem_map,	160	(syshandler_t) sys_physmem_map,
158	(syshandler_t) sys_iospace_enable,	161	(syshandler_t) sys_iospace_enable,
159	(syshandler_t) sys_preempt_control,	162	(syshandler_t) sys_preempt_control,
160		163
161	/* Sysinfo syscalls */	164	/* Sysinfo syscalls */
162	(syshandler_t) sys_sysinfo_valid,	165	(syshandler_t) sys_sysinfo_valid,
163	(syshandler_t) sys_sysinfo_value,	166	(syshandler_t) sys_sysinfo_value,
164		167
165	/* Debug calls */	168	/* Debug calls */
166	(syshandler_t) sys_debug_enable_console,	169	(syshandler_t) sys_debug_enable_console,
167		170
168	(syshandler_t) sys_ipc_connect_kbox	171	(syshandler_t) sys_ipc_connect_kbox
169	};	172	};
170		173
171	/** @}	174	/** @}
172	*/	175	*/
173		176

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(root)/branches/tracing/kernel/generic/src/syscall/syscall.c – Rev 2813 → 2817