WebSVN – HelenOS-historic – Diff – /kernel/trunk/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.
 */
 
/**
 * @file    syscall.c
 * @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>
 
/** Print using kernel facility
 *
 * Some simulators can print only through kernel. Userspace can use
 * this syscall to facilitate it.
 */
static __native sys_io(int fd, const void * buf, size_t count)
{
    size_t i;
    char *data;
    int rc;
 
    if (count > PAGE_SIZE)
        return ELIMIT;
 
    data = 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 __native sys_debug_enable_console(void)
{
    arch_grab_console();
    return 0;
}
 
/** Dispatch system call */
__native syscall_handler(__native a1, __native a2, __native a3,
             __native a4, __native id)
{
    __native rc;
    ipl_t ipl;
    bool exit = false;
 
    if (id < SYSCALL_END)
        rc = syscall_table[id](a1,a2,a3,a4);
    else
        panic("Undefined syscall %d", id);
       
    ipl = interrupts_disable();
    spinlock_lock(&THREAD->lock);
    if (THREAD->interrupted)
        exit = true;
    spinlock_unlock(&THREAD->lock);
    interrupts_restore(ipl);
   
    if (exit)
        thread_exit();
   
    return rc;
}
 
syshandler_t syscall_table[SYSCALL_END] = {
    sys_io,
    sys_tls_set,
   
    /* Thread and task related syscalls. */
    sys_thread_create,
    sys_thread_exit,
    sys_task_get_id,
   
    /* Synchronization related syscalls. */
    sys_futex_sleep_timeout,
    sys_futex_wakeup,
   
    /* Address space related syscalls. */
    sys_as_area_create,
    sys_as_area_resize,
    sys_as_area_destroy,
 
    /* IPC related syscalls. */
    sys_ipc_call_sync_fast,
    sys_ipc_call_sync,
    sys_ipc_call_async_fast,
    sys_ipc_call_async,
    sys_ipc_answer_fast,
    sys_ipc_answer,
    sys_ipc_forward_fast,
    sys_ipc_wait_for_call,
    sys_ipc_hangup,
    sys_ipc_register_irq,
    sys_ipc_unregister_irq,
 
    /* Capabilities related syscalls. */
    sys_cap_grant,
    sys_cap_revoke,
 
    /* DDI related syscalls. */
    sys_physmem_map,
    sys_iospace_enable,
    sys_preempt_control,
   
    /* Sysinfo syscalls */
    sys_sysinfo_valid,
    sys_sysinfo_value,
   
    /* Debug calls */
    sys_debug_enable_console
};
 

Rev 1474	Rev 1579
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	/**	29	/**
30	* @file syscall.c	30	* @file syscall.c
31	* @brief Syscall table and syscall wrappers.	31	* @brief Syscall table and syscall wrappers.
32	*/	32	*/
33		33
34	#include <syscall/syscall.h>	34	#include <syscall/syscall.h>
35	#include <proc/thread.h>	35	#include <proc/thread.h>
36	#include <proc/task.h>	36	#include <proc/task.h>
37	#include <mm/as.h>	37	#include <mm/as.h>
38	#include <print.h>	38	#include <print.h>
39	#include <putchar.h>	39	#include <putchar.h>
40	#include <errno.h>	40	#include <errno.h>
41	#include <arch.h>	41	#include <arch.h>
42	#include <debug.h>	42	#include <debug.h>
43	#include <ipc/sysipc.h>	43	#include <ipc/sysipc.h>
44	#include <synch/futex.h>	44	#include <synch/futex.h>
45	#include <ddi/ddi.h>	45	#include <ddi/ddi.h>
46	#include <security/cap.h>	46	#include <security/cap.h>
47	#include <syscall/copy.h>	47	#include <syscall/copy.h>
48	#include <sysinfo/sysinfo.h>	48	#include <sysinfo/sysinfo.h>
49	#include <console/console.h>	49	#include <console/console.h>
50		50
51	/** Print using kernel facility	51	/** Print using kernel facility
52	*	52	*
53	* Some simulators can print only through kernel. Userspace can use	53	* Some simulators can print only through kernel. Userspace can use
54	* this syscall to facilitate it.	54	* this syscall to facilitate it.
55	*/	55	*/
56	static __native sys_io(int fd, const void * buf, size_t count)	56	static __native sys_io(int fd, const void * buf, size_t count)
57	{	57	{
58	size_t i;	58	size_t i;
59	char *data;	59	char *data;
60	int rc;	60	int rc;
61		61
62	if (count > PAGE_SIZE)	62	if (count > PAGE_SIZE)
63	return ELIMIT;	63	return ELIMIT;
64		64
65	data = malloc(count, 0);	65	data = malloc(count, 0);
66	if (!data)	66	if (!data)
67	return ENOMEM;	67	return ENOMEM;
68		68
69	rc = copy_from_uspace(data, buf, count);	69	rc = copy_from_uspace(data, buf, count);
70	if (rc) {	70	if (rc) {
71	free(data);	71	free(data);
72	return rc;	72	return rc;
73	}	73	}
74		74
75	for (i = 0; i < count; i++)	75	for (i = 0; i < count; i++)
76	putchar(data[i]);	76	putchar(data[i]);
77	free(data);	77	free(data);
78		78
79	return count;	79	return count;
80	}	80	}
81		81
82	/** Tell kernel to get keyboard/console access again */	82	/** Tell kernel to get keyboard/console access again */
83	static __native sys_debug_enable_console(void)	83	static __native sys_debug_enable_console(void)
84	{	84	{
85	arch_grab_console();	85	arch_grab_console();
86	return 0;	86	return 0;
87	}	87	}
88		88
89	/** Dispatch system call */	89	/** Dispatch system call */
90	__native syscall_handler(__native a1, __native a2, __native a3,	90	__native syscall_handler(__native a1, __native a2, __native a3,
91	__native a4, __native id)	91	__native a4, __native id)
92	{	92	{
-		93	__native rc;
-		94	ipl_t ipl;
-		95	bool exit = false;
-		96
93	if (id < SYSCALL_END)	97	if (id < SYSCALL_END)
94	return syscall_table[id](a1,a2,a3,a4);	98	rc = syscall_table[id](a1,a2,a3,a4);
95	else	99	else
96	panic("Undefined syscall %d", id);	100	panic("Undefined syscall %d", id);
-		101
-		102	ipl = interrupts_disable();
-		103	spinlock_lock(&THREAD->lock);
-		104	if (THREAD->interrupted)
-		105	exit = true;
-		106	spinlock_unlock(&THREAD->lock);
-		107	interrupts_restore(ipl);
-		108
-		109	if (exit)
-		110	thread_exit();
-		111
-		112	return rc;
97	}	113	}
98		114
99	syshandler_t syscall_table[SYSCALL_END] = {	115	syshandler_t syscall_table[SYSCALL_END] = {
100	sys_io,	116	sys_io,
101	sys_tls_set,	117	sys_tls_set,
102		118
103	/* Thread and task related syscalls. */	119	/* Thread and task related syscalls. */
104	sys_thread_create,	120	sys_thread_create,
105	sys_thread_exit,	121	sys_thread_exit,
106	sys_task_get_id,	122	sys_task_get_id,
107		123
108	/* Synchronization related syscalls. */	124	/* Synchronization related syscalls. */
109	sys_futex_sleep_timeout,	125	sys_futex_sleep_timeout,
110	sys_futex_wakeup,	126	sys_futex_wakeup,
111		127
112	/* Address space related syscalls. */	128	/* Address space related syscalls. */
113	sys_as_area_create,	129	sys_as_area_create,
114	sys_as_area_resize,	130	sys_as_area_resize,
115	sys_as_area_destroy,	131	sys_as_area_destroy,
116		132
117	/* IPC related syscalls. */	133	/* IPC related syscalls. */
118	sys_ipc_call_sync_fast,	134	sys_ipc_call_sync_fast,
119	sys_ipc_call_sync,	135	sys_ipc_call_sync,
120	sys_ipc_call_async_fast,	136	sys_ipc_call_async_fast,
121	sys_ipc_call_async,	137	sys_ipc_call_async,
122	sys_ipc_answer_fast,	138	sys_ipc_answer_fast,
123	sys_ipc_answer,	139	sys_ipc_answer,
124	sys_ipc_forward_fast,	140	sys_ipc_forward_fast,
125	sys_ipc_wait_for_call,	141	sys_ipc_wait_for_call,
126	sys_ipc_hangup,	142	sys_ipc_hangup,
127	sys_ipc_register_irq,	143	sys_ipc_register_irq,
128	sys_ipc_unregister_irq,	144	sys_ipc_unregister_irq,
129		145
130	/* Capabilities related syscalls. */	146	/* Capabilities related syscalls. */
131	sys_cap_grant,	147	sys_cap_grant,
132	sys_cap_revoke,	148	sys_cap_revoke,
133		149
134	/* DDI related syscalls. */	150	/* DDI related syscalls. */
135	sys_physmem_map,	151	sys_physmem_map,
136	sys_iospace_enable,	152	sys_iospace_enable,
137	sys_preempt_control,	153	sys_preempt_control,
138		154
139	/* Sysinfo syscalls */	155	/* Sysinfo syscalls */
140	sys_sysinfo_valid,	156	sys_sysinfo_valid,
141	sys_sysinfo_value,	157	sys_sysinfo_value,
142		158
143	/* Debug calls */	159	/* Debug calls */
144	sys_debug_enable_console	160	sys_debug_enable_console
145	};	161	};
146		162

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/src/syscall/syscall.c @ 1474 – Rev 1474 → 1579