| 1 | /*
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| 2 | * Copyright (C) 2005 Martin Decky
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /**
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| 30 | * @file syscall.c
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| 31 | * @brief Syscall table and syscall wrappers.
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| 32 | */
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| 33 |
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| 34 | #include <syscall/syscall.h>
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| 35 | #include <proc/thread.h>
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| 36 | #include <proc/task.h>
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| 37 | #include <mm/as.h>
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| 38 | #include <print.h>
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| 39 | #include <putchar.h>
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| 40 | #include <errno.h>
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| 41 | #include <arch.h>
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| 42 | #include <debug.h>
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| 43 | #include <ipc/sysipc.h>
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| 44 | #include <synch/futex.h>
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| 45 | #include <ddi/ddi.h>
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| 46 | #include <security/cap.h>
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| 47 | #include <syscall/copy.h>
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| 48 | #include <sysinfo/sysinfo.h>
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| 49 | #include <console/console.h>
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| 50 | #include <console/klog.h>
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| 51 |
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| 52 | /** Print using kernel facility
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| 53 | *
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| 54 | * Some simulators can print only through kernel. Userspace can use
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| 55 | * this syscall to facilitate it.
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| 56 | */
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| 57 | static __native sys_io(int fd, const void * buf, size_t count)
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| 58 | {
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| 59 | size_t i;
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| 60 | char *data;
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| 61 | int rc;
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| 62 |
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| 63 | if (count > PAGE_SIZE)
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| 64 | return ELIMIT;
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| 65 |
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| 66 | data = malloc(count, 0);
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| 67 | if (!data)
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| 68 | return ENOMEM;
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| 69 |
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| 70 | rc = copy_from_uspace(data, buf, count);
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| 71 | if (rc) {
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| 72 | free(data);
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| 73 | return rc;
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| 74 | }
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| 75 |
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| 76 | for (i = 0; i < count; i++)
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| 77 | putchar(data[i]);
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| 78 | free(data);
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| 79 |
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| 80 | return count;
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| 81 | }
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| 82 |
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| 83 | /** Tell kernel to get keyboard/console access again */
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| 84 | static __native sys_debug_enable_console(void)
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| 85 | {
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| 86 | arch_grab_console();
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| 87 | return 0;
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| 88 | }
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| 89 |
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| 90 | /** Dispatch system call */
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| 91 | __native syscall_handler(__native a1, __native a2, __native a3,
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| 92 | __native a4, __native id)
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| 93 | {
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| 94 | __native rc;
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| 95 |
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| 96 | if (id < SYSCALL_END)
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| 97 | rc = syscall_table[id](a1,a2,a3,a4);
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| 98 | else {
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| 99 | klog_printf("TASK %lld: Unknown syscall id %d",TASK->taskid,id);
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| 100 | task_kill(TASK->taskid);
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| 101 | thread_exit();
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| 102 | }
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| 103 |
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| 104 | if (THREAD->interrupted)
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| 105 | thread_exit();
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| 106 |
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| 107 | return rc;
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| 108 | }
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| 109 |
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| 110 | syshandler_t syscall_table[SYSCALL_END] = {
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| 111 | sys_io,
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| 112 | sys_tls_set,
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| 113 |
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| 114 | /* Thread and task related syscalls. */
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| 115 | sys_thread_create,
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| 116 | sys_thread_exit,
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| 117 | sys_task_get_id,
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| 118 |
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| 119 | /* Synchronization related syscalls. */
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| 120 | sys_futex_sleep_timeout,
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| 121 | sys_futex_wakeup,
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| 122 |
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| 123 | /* Address space related syscalls. */
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| 124 | sys_as_area_create,
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| 125 | sys_as_area_resize,
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| 126 | sys_as_area_destroy,
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| 127 |
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| 128 | /* IPC related syscalls. */
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| 129 | sys_ipc_call_sync_fast,
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| 130 | sys_ipc_call_sync,
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| 131 | sys_ipc_call_async_fast,
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| 132 | sys_ipc_call_async,
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| 133 | sys_ipc_answer_fast,
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| 134 | sys_ipc_answer,
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| 135 | sys_ipc_forward_fast,
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| 136 | sys_ipc_wait_for_call,
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| 137 | sys_ipc_hangup,
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| 138 | sys_ipc_register_irq,
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| 139 | sys_ipc_unregister_irq,
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| 140 |
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| 141 | /* Capabilities related syscalls. */
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| 142 | sys_cap_grant,
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| 143 | sys_cap_revoke,
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| 144 |
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| 145 | /* DDI related syscalls. */
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| 146 | sys_physmem_map,
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| 147 | sys_iospace_enable,
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| 148 | sys_preempt_control,
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| 149 |
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| 150 | /* Sysinfo syscalls */
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| 151 | sys_sysinfo_valid,
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| 152 | sys_sysinfo_value,
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| 153 |
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| 154 | /* Debug calls */
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| 155 | sys_debug_enable_console
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| 156 | };
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