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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 |