| 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 <mm/page.h>
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| 44 | #include <print.h>
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| 45 | #include <arch.h>
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| 46 | #include <debug.h>
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| 47 | #include <ddi/device.h>
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| 48 | #include <interrupt.h>
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| 49 | #include <ipc/sysipc.h>
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| 50 | #include <synch/futex.h>
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| 51 | #include <synch/smc.h>
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| 52 | #include <synch/smp_memory_barrier.h>
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| 53 | #include <ddi/ddi.h>
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| 54 | #include <ipc/event.h>
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| 55 | #include <security/cap.h>
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| 56 | #include <sysinfo/sysinfo.h>
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| 57 | #include <console/console.h>
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| 58 | #include <udebug/udebug.h>
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| 59 |
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| 60 | /** Dispatch system call */
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| 61 | sysarg_t syscall_handler(sysarg_t a1, sysarg_t a2, sysarg_t a3,
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| 62 | sysarg_t a4, sysarg_t a5, sysarg_t a6, sysarg_t id)
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| 63 | {
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| 64 | /* Do userpace accounting */
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| 65 | irq_spinlock_lock(&THREAD->lock, true);
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| 66 | thread_update_accounting(true);
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| 67 | irq_spinlock_unlock(&THREAD->lock, true);
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| 68 |
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| 69 | #ifdef CONFIG_UDEBUG
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| 70 | /*
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| 71 | * An istate_t-compatible record was created on the stack by the
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| 72 | * low-level syscall handler. This is the userspace space state
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| 73 | * structure.
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| 74 | */
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| 75 | THREAD->udebug.uspace_state = istate_get(THREAD);
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| 76 |
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| 77 | /*
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| 78 | * Early check for undebugged tasks. We do not lock anything as this
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| 79 | * test need not be precise in either direction.
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| 80 | */
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| 81 | if (THREAD->udebug.active)
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| 82 | udebug_syscall_event(a1, a2, a3, a4, a5, a6, id, 0, false);
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| 83 | #endif
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| 84 |
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| 85 | sysarg_t rc;
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| 86 | if (id < SYSCALL_END) {
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| 87 | rc = syscall_table[id](a1, a2, a3, a4, a5, a6);
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| 88 | } else {
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| 89 | printf("Task %" PRIu64": Unknown syscall %#" PRIxn, TASK->taskid, id);
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| 90 | task_kill_self(true);
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| 91 | }
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| 92 |
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| 93 | if (THREAD->interrupted)
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| 94 | thread_exit();
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| 95 |
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| 96 | #ifdef CONFIG_UDEBUG
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| 97 | if (THREAD->udebug.active) {
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| 98 | udebug_syscall_event(a1, a2, a3, a4, a5, a6, id, rc, true);
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| 99 |
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| 100 | /*
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| 101 | * Stopping point needed for tasks that only invoke
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| 102 | * non-blocking system calls. Not needed if the task
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| 103 | * is not being debugged (it cannot block here).
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| 104 | */
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| 105 | udebug_stoppable_begin();
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| 106 | udebug_stoppable_end();
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| 107 | }
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| 108 |
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| 109 | /* Clear userspace state pointer */
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| 110 | THREAD->udebug.uspace_state = NULL;
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| 111 | #endif
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| 112 |
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| 113 | /* Do kernel accounting */
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| 114 | irq_spinlock_lock(&THREAD->lock, true);
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| 115 | thread_update_accounting(false);
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| 116 | irq_spinlock_unlock(&THREAD->lock, true);
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| 117 |
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| 118 | return rc;
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| 119 | }
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| 120 |
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| 121 | syshandler_t syscall_table[SYSCALL_END] = {
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| 122 | /* System management syscalls. */
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| 123 | (syshandler_t) sys_klog,
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| 124 | (syshandler_t) sys_tls_set,
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| 125 |
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| 126 | /* Thread and task related syscalls. */
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| 127 | (syshandler_t) sys_thread_create,
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| 128 | (syshandler_t) sys_thread_exit,
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| 129 | (syshandler_t) sys_thread_get_id,
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| 130 | (syshandler_t) sys_thread_usleep,
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| 131 | (syshandler_t) sys_thread_udelay,
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| 132 |
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| 133 | (syshandler_t) sys_task_get_id,
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| 134 | (syshandler_t) sys_task_set_name,
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| 135 | (syshandler_t) sys_task_kill,
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| 136 | (syshandler_t) sys_task_exit,
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| 137 | (syshandler_t) sys_program_spawn_loader,
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| 138 |
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| 139 | /* Synchronization related syscalls. */
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| 140 | (syshandler_t) sys_futex_sleep,
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| 141 | (syshandler_t) sys_futex_wakeup,
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| 142 | (syshandler_t) sys_smc_coherence,
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| 143 | (syshandler_t) sys_smp_memory_barrier,
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| 144 |
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| 145 |
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| 146 | /* Address space related syscalls. */
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| 147 | (syshandler_t) sys_as_area_create,
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| 148 | (syshandler_t) sys_as_area_resize,
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| 149 | (syshandler_t) sys_as_area_change_flags,
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| 150 | (syshandler_t) sys_as_area_destroy,
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| 151 |
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| 152 | /* Page mapping related syscalls. */
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| 153 | (syshandler_t) sys_page_find_mapping,
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| 154 |
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| 155 | /* IPC related syscalls. */
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| 156 | (syshandler_t) sys_ipc_call_async_fast,
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| 157 | (syshandler_t) sys_ipc_call_async_slow,
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| 158 | (syshandler_t) sys_ipc_answer_fast,
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| 159 | (syshandler_t) sys_ipc_answer_slow,
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| 160 | (syshandler_t) sys_ipc_forward_fast,
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| 161 | (syshandler_t) sys_ipc_forward_slow,
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| 162 | (syshandler_t) sys_ipc_wait_for_call,
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| 163 | (syshandler_t) sys_ipc_poke,
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| 164 | (syshandler_t) sys_ipc_hangup,
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| 165 | (syshandler_t) sys_ipc_connect_kbox,
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| 166 |
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| 167 | /* Event notification syscalls. */
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| 168 | (syshandler_t) sys_event_subscribe,
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| 169 | (syshandler_t) sys_event_unmask,
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| 170 |
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| 171 | /* Capabilities related syscalls. */
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| 172 | (syshandler_t) sys_cap_grant,
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| 173 | (syshandler_t) sys_cap_revoke,
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| 174 |
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| 175 | /* DDI related syscalls. */
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| 176 | (syshandler_t) sys_device_assign_devno,
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| 177 | (syshandler_t) sys_physmem_map,
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| 178 | (syshandler_t) sys_physmem_unmap,
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| 179 | (syshandler_t) sys_dmamem_map,
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| 180 | (syshandler_t) sys_dmamem_unmap,
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| 181 | (syshandler_t) sys_iospace_enable,
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| 182 | (syshandler_t) sys_iospace_disable,
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| 183 | (syshandler_t) sys_irq_register,
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| 184 | (syshandler_t) sys_irq_unregister,
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| 185 |
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| 186 | /* Sysinfo syscalls. */
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| 187 | (syshandler_t) sys_sysinfo_get_keys_size,
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| 188 | (syshandler_t) sys_sysinfo_get_keys,
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| 189 | (syshandler_t) sys_sysinfo_get_val_type,
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| 190 | (syshandler_t) sys_sysinfo_get_value,
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| 191 | (syshandler_t) sys_sysinfo_get_data_size,
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| 192 | (syshandler_t) sys_sysinfo_get_data,
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| 193 |
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| 194 | /* Kernel console syscalls. */
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| 195 | (syshandler_t) sys_debug_activate_console
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| 196 | };
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| 197 |
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| 198 | /** @}
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| 199 | */
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