| 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 | /** @addtogroup generic
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| 30 | * @{
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| 31 | */
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| 32 |
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| 33 | /**
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| 34 | * @file
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| 35 | * @brief Syscall table and syscall wrappers.
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| 36 | */
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| 37 |
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| 38 | #include <syscall/syscall.h>
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| 39 | #include <proc/thread.h>
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| 40 | #include <proc/task.h>
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| 41 | #include <proc/program.h>
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| 42 | #include <mm/as.h>
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| 43 | #include <print.h>
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| 44 | #include <putchar.h>
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| 45 | #include <errno.h>
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| 46 | #include <arch.h>
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| 47 | #include <debug.h>
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| 48 | #include <ipc/sysipc.h>
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| 49 | #include <synch/futex.h>
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| 50 | #include <synch/smc.h>
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| 51 | #include <ddi/ddi.h>
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| 52 | #include <security/cap.h>
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| 53 | #include <syscall/copy.h>
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| 54 | #include <sysinfo/sysinfo.h>
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| 55 | #include <console/console.h>
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| 56 | #include <udebug/udebug.h>
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| 57 |
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| 58 | /** Print using kernel facility
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| 59 | *
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| 60 | * Print to kernel log.
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| 61 | *
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| 62 | */
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| 63 | static unative_t sys_klog(int fd, const void * buf, size_t count)
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| 64 | {
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| 65 | char *data;
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| 66 | int rc;
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| 67 |
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| 68 | if (count > PAGE_SIZE)
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| 69 | return ELIMIT;
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| 70 |
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| 71 | if (count > 0) {
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| 72 | data = (char *) malloc(count + 1, 0);
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| 73 | if (!data)
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| 74 | return ENOMEM;
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| 75 |
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| 76 | rc = copy_from_uspace(data, buf, count);
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| 77 | if (rc) {
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| 78 | free(data);
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| 79 | return rc;
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| 80 | }
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| 81 | data[count] = 0;
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| 82 |
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| 83 | printf("%s", data);
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| 84 | free(data);
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| 85 | } else
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| 86 | klog_update();
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| 87 |
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| 88 | return count;
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| 89 | }
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| 90 |
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| 91 | /** Tell kernel to get keyboard/console access again */
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| 92 | static unative_t sys_debug_enable_console(void)
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| 93 | {
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| 94 | #ifdef CONFIG_KCONSOLE
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| 95 | grab_console();
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| 96 | return true;
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| 97 | #else
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| 98 | return false;
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| 99 | #endif
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| 100 | }
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| 101 |
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| 102 | /** Tell kernel to relinquish keyboard/console access */
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| 103 | static unative_t sys_debug_disable_console(void)
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| 104 | {
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| 105 | release_console();
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| 106 | return true;
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| 107 | }
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| 108 |
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| 109 | /** Dispatch system call */
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| 110 | unative_t syscall_handler(unative_t a1, unative_t a2, unative_t a3,
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| 111 | unative_t a4, unative_t a5, unative_t a6, unative_t id)
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| 112 | {
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| 113 | unative_t rc;
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| 114 |
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| 115 | #ifdef CONFIG_UDEBUG
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| 116 | udebug_syscall_event(a1, a2, a3, a4, a5, a6, id, 0, false);
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| 117 | #endif
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| 118 | if (id < SYSCALL_END) {
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| 119 | rc = syscall_table[id](a1, a2, a3, a4, a5, a6);
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| 120 | } else {
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| 121 | printf("Task %" PRIu64": Unknown syscall %#" PRIxn, TASK->taskid, id);
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| 122 | task_kill(TASK->taskid);
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| 123 | thread_exit();
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| 124 | }
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| 125 |
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| 126 | if (THREAD->interrupted)
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| 127 | thread_exit();
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| 128 |
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| 129 | #ifdef CONFIG_UDEBUG
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| 130 | udebug_syscall_event(a1, a2, a3, a4, a5, a6, id, rc, true);
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| 131 |
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| 132 | /*
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| 133 | * Stopping point needed for tasks that only invoke non-blocking
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| 134 | * system calls.
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| 135 | */
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| 136 | udebug_stoppable_begin();
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| 137 | udebug_stoppable_end();
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| 138 | #endif
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| 139 | return rc;
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| 140 | }
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| 141 |
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| 142 | syshandler_t syscall_table[SYSCALL_END] = {
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| 143 | (syshandler_t) sys_klog,
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| 144 | (syshandler_t) sys_tls_set,
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| 145 |
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| 146 | /* Thread and task related syscalls. */
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| 147 | (syshandler_t) sys_thread_create,
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| 148 | (syshandler_t) sys_thread_exit,
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| 149 | (syshandler_t) sys_thread_get_id,
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| 150 |
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| 151 | (syshandler_t) sys_task_get_id,
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| 152 | (syshandler_t) sys_program_spawn_loader,
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| 153 |
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| 154 | /* Synchronization related syscalls. */
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| 155 | (syshandler_t) sys_futex_sleep_timeout,
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| 156 | (syshandler_t) sys_futex_wakeup,
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| 157 | (syshandler_t) sys_smc_coherence,
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| 158 |
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| 159 | /* Address space related syscalls. */
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| 160 | (syshandler_t) sys_as_area_create,
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| 161 | (syshandler_t) sys_as_area_resize,
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| 162 | (syshandler_t) sys_as_area_change_flags,
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| 163 | (syshandler_t) sys_as_area_destroy,
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| 164 |
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| 165 | /* IPC related syscalls. */
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| 166 | (syshandler_t) sys_ipc_call_sync_fast,
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| 167 | (syshandler_t) sys_ipc_call_sync_slow,
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| 168 | (syshandler_t) sys_ipc_call_async_fast,
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| 169 | (syshandler_t) sys_ipc_call_async_slow,
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| 170 | (syshandler_t) sys_ipc_answer_fast,
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| 171 | (syshandler_t) sys_ipc_answer_slow,
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| 172 | (syshandler_t) sys_ipc_forward_fast,
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| 173 | (syshandler_t) sys_ipc_forward_slow,
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| 174 | (syshandler_t) sys_ipc_wait_for_call,
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| 175 | (syshandler_t) sys_ipc_hangup,
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| 176 | (syshandler_t) sys_ipc_register_irq,
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| 177 | (syshandler_t) sys_ipc_unregister_irq,
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| 178 |
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| 179 | /* Capabilities related syscalls. */
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| 180 | (syshandler_t) sys_cap_grant,
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| 181 | (syshandler_t) sys_cap_revoke,
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| 182 |
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| 183 | /* DDI related syscalls. */
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| 184 | (syshandler_t) sys_physmem_map,
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| 185 | (syshandler_t) sys_iospace_enable,
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| 186 | (syshandler_t) sys_preempt_control,
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| 187 |
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| 188 | /* Sysinfo syscalls */
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| 189 | (syshandler_t) sys_sysinfo_valid,
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| 190 | (syshandler_t) sys_sysinfo_value,
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| 191 |
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| 192 | /* Debug calls */
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| 193 | (syshandler_t) sys_debug_enable_console,
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| 194 | (syshandler_t) sys_debug_disable_console,
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| 195 |
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| 196 | (syshandler_t) sys_ipc_connect_kbox
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| 197 | };
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| 198 |
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| 199 | /** @}
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| 200 | */
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