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>
 
/** 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;
 
    if (id < SYSCALL_END)
        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();
   
    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
 
 
 
 
 
 
 
 
 
};
 
/** @}
 */
 

Rev 2787	Rev 2799
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 <tdebug/tdebug.h>	-
48	#include <tdebug/systdebug.h>	-
49	#include <ipc/sysipc.h>	47	#include <ipc/sysipc.h>
50	#include <synch/futex.h>	48	#include <synch/futex.h>
51	#include <ddi/ddi.h>	49	#include <ddi/ddi.h>
52	#include <security/cap.h>	50	#include <security/cap.h>
53	#include <syscall/copy.h>	51	#include <syscall/copy.h>
54	#include <sysinfo/sysinfo.h>	52	#include <sysinfo/sysinfo.h>
55	#include <console/console.h>	53	#include <console/console.h>
56	#include <console/klog.h>	54	#include <console/klog.h>
57		55
58	/** Print using kernel facility	56	/** Print using kernel facility
59	*	57	*
60	* Some simulators can print only through kernel. Userspace can use	58	* Some simulators can print only through kernel. Userspace can use
61	* this syscall to facilitate it.	59	* this syscall to facilitate it.
62	*/	60	*/
63	static unative_t sys_io(int fd, const void * buf, size_t count)	61	static unative_t sys_io(int fd, const void * buf, size_t count)
64	{	62	{
65	size_t i;	63	size_t i;
66	char *data;	64	char *data;
67	int rc;	65	int rc;
68		66
69	if (count > PAGE_SIZE)	67	if (count > PAGE_SIZE)
70	return ELIMIT;	68	return ELIMIT;
71		69
72	data = (char *) malloc(count, 0);	70	data = (char *) malloc(count, 0);
73	if (!data)	71	if (!data)
74	return ENOMEM;	72	return ENOMEM;
75		73
76	rc = copy_from_uspace(data, buf, count);	74	rc = copy_from_uspace(data, buf, count);
77	if (rc) {	75	if (rc) {
78	free(data);	76	free(data);
79	return rc;	77	return rc;
80	}	78	}
81		79
82	for (i = 0; i < count; i++)	80	for (i = 0; i < count; i++)
83	putchar(data[i]);	81	putchar(data[i]);
84	free(data);	82	free(data);
85		83
86	return count;	84	return count;
87	}	85	}
88		86
89	/** Tell kernel to get keyboard/console access again */	87	/** Tell kernel to get keyboard/console access again */
90	static unative_t sys_debug_enable_console(void)	88	static unative_t sys_debug_enable_console(void)
91	{	89	{
92	arch_grab_console();	90	arch_grab_console();
93	return 0;	91	return 0;
94	}	92	}
95		93
96	/** Dispatch system call */	94	/** Dispatch system call */
97	unative_t syscall_handler(unative_t a1, unative_t a2, unative_t a3,	95	unative_t syscall_handler(unative_t a1, unative_t a2, unative_t a3,
98	unative_t a4, unative_t a5, unative_t a6, unative_t id)	96	unative_t a4, unative_t a5, unative_t a6, unative_t id)
99	{	97	{
100	unative_t rc;	98	unative_t rc;
101		99
102	if (id < SYSCALL_END)	100	if (id < SYSCALL_END)
103	rc = syscall_table[id](a1, a2, a3, a4, a5, a6);	101	rc = syscall_table[id](a1, a2, a3, a4, a5, a6);
104	else {	102	else {
105	klog_printf("TASK %llu: Unknown syscall id %llx", TASK->taskid,	103	klog_printf("TASK %llu: Unknown syscall id %llx", TASK->taskid,
106	id);	104	id);
107	task_kill(TASK->taskid);	105	task_kill(TASK->taskid);
108	thread_exit();	106	thread_exit();
109	}	107	}
110		108
111	if (tdebug_have_monitor()) {	-
112	/* generate a syscall debug event */	-
113	tdebug_syscall_event(a1, a2, a3, a4, a5, a6, id, rc);	-
114		-
115	/* a good place to stop */	-
116	tdebug_stopping_point();	-
117	}	-
118		-
119	if (THREAD->interrupted)	109	if (THREAD->interrupted)
120	thread_exit();	110	thread_exit();
121		111
122	return rc;	112	return rc;
123	}	113	}
124		114
125	syshandler_t syscall_table[SYSCALL_END] = {	115	syshandler_t syscall_table[SYSCALL_END] = {
126	(syshandler_t) sys_io,	116	(syshandler_t) sys_io,
127	(syshandler_t) sys_tls_set,	117	(syshandler_t) sys_tls_set,
128		118
129	/* Thread and task related syscalls. */	119	/* Thread and task related syscalls. */
130	(syshandler_t) sys_thread_create,	120	(syshandler_t) sys_thread_create,
131	(syshandler_t) sys_thread_exit,	121	(syshandler_t) sys_thread_exit,
132	(syshandler_t) sys_thread_get_id,	122	(syshandler_t) sys_thread_get_id,
133	(syshandler_t) sys_task_get_id,	123	(syshandler_t) sys_task_get_id,
134		124
135	/* Synchronization related syscalls. */	125	/* Synchronization related syscalls. */
136	(syshandler_t) sys_futex_sleep_timeout,	126	(syshandler_t) sys_futex_sleep_timeout,
137	(syshandler_t) sys_futex_wakeup,	127	(syshandler_t) sys_futex_wakeup,
138		128
139	/* Address space related syscalls. */	129	/* Address space related syscalls. */
140	(syshandler_t) sys_as_area_create,	130	(syshandler_t) sys_as_area_create,
141	(syshandler_t) sys_as_area_resize,	131	(syshandler_t) sys_as_area_resize,
142	(syshandler_t) sys_as_area_destroy,	132	(syshandler_t) sys_as_area_destroy,
143		133
144	/* IPC related syscalls. */	134	/* IPC related syscalls. */
145	(syshandler_t) sys_ipc_call_sync_fast,	135	(syshandler_t) sys_ipc_call_sync_fast,
146	(syshandler_t) sys_ipc_call_sync_slow,	136	(syshandler_t) sys_ipc_call_sync_slow,
147	(syshandler_t) sys_ipc_call_async_fast,	137	(syshandler_t) sys_ipc_call_async_fast,
148	(syshandler_t) sys_ipc_call_async_slow,	138	(syshandler_t) sys_ipc_call_async_slow,
149	(syshandler_t) sys_ipc_answer_fast,	139	(syshandler_t) sys_ipc_answer_fast,
150	(syshandler_t) sys_ipc_answer_slow,	140	(syshandler_t) sys_ipc_answer_slow,
151	(syshandler_t) sys_ipc_forward_fast,	141	(syshandler_t) sys_ipc_forward_fast,
152	(syshandler_t) sys_ipc_wait_for_call,	142	(syshandler_t) sys_ipc_wait_for_call,
153	(syshandler_t) sys_ipc_hangup,	143	(syshandler_t) sys_ipc_hangup,
154	(syshandler_t) sys_ipc_register_irq,	144	(syshandler_t) sys_ipc_register_irq,
155	(syshandler_t) sys_ipc_unregister_irq,	145	(syshandler_t) sys_ipc_unregister_irq,
156		146
157	/* Capabilities related syscalls. */	147	/* Capabilities related syscalls. */
158	(syshandler_t) sys_cap_grant,	148	(syshandler_t) sys_cap_grant,
159	(syshandler_t) sys_cap_revoke,	149	(syshandler_t) sys_cap_revoke,
160		150
161	/* DDI related syscalls. */	151	/* DDI related syscalls. */
162	(syshandler_t) sys_physmem_map,	152	(syshandler_t) sys_physmem_map,
163	(syshandler_t) sys_iospace_enable,	153	(syshandler_t) sys_iospace_enable,
164	(syshandler_t) sys_preempt_control,	154	(syshandler_t) sys_preempt_control,
165		155
166	/* Sysinfo syscalls */	156	/* Sysinfo syscalls */
167	(syshandler_t) sys_sysinfo_valid,	157	(syshandler_t) sys_sysinfo_valid,
168	(syshandler_t) sys_sysinfo_value,	158	(syshandler_t) sys_sysinfo_value,
169		159
170	/* Debug calls */	160	/* Debug calls */
171	(syshandler_t) sys_debug_enable_console,	161	(syshandler_t) sys_debug_enable_console
172		-
173	/* Task debugging calls */	-
174	(syshandler_t) sys_tdebug_attach_task,	-
175	(syshandler_t) sys_tdebug_detach_task,	-
176	(syshandler_t) sys_tdebug_continue_thread,	-
177	(syshandler_t) sys_tdebug_get_syscall_args,	-
178	(syshandler_t) sys_tdebug_set_event_mask,	-
179	(syshandler_t) sys_tdebug_stop_thread,	-
180	(syshandler_t) sys_tdebug_stop_task	-
181	};	162	};
182		163
183	/** @}	164	/** @}
184	*/	165	*/
185		166

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(root)/branches/tracing/kernel/generic/src/syscall/syscall.c @ 2883 – Rev 2787 → 2799