| 1 | /*
|
|---|
| 2 | * Copyright (c) 2025 Jiri Svoboda
|
|---|
| 3 | * Copyright (c) 2005 Martin Decky
|
|---|
| 4 | * All rights reserved.
|
|---|
| 5 | *
|
|---|
| 6 | * Redistribution and use in source and binary forms, with or without
|
|---|
| 7 | * modification, are permitted provided that the following conditions
|
|---|
| 8 | * are met:
|
|---|
| 9 | *
|
|---|
| 10 | * - Redistributions of source code must retain the above copyright
|
|---|
| 11 | * notice, this list of conditions and the following disclaimer.
|
|---|
| 12 | * - Redistributions in binary form must reproduce the above copyright
|
|---|
| 13 | * notice, this list of conditions and the following disclaimer in the
|
|---|
| 14 | * documentation and/or other materials provided with the distribution.
|
|---|
| 15 | * - The name of the author may not be used to endorse or promote products
|
|---|
| 16 | * derived from this software without specific prior written permission.
|
|---|
| 17 | *
|
|---|
| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|---|
| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|---|
| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|---|
| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|---|
| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|---|
| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|---|
| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|---|
| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|---|
| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|---|
| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|---|
| 28 | */
|
|---|
| 29 |
|
|---|
| 30 | /** @addtogroup kernel_generic
|
|---|
| 31 | * @{
|
|---|
| 32 | */
|
|---|
| 33 |
|
|---|
| 34 | /**
|
|---|
| 35 | * @file
|
|---|
| 36 | * @brief Syscall table and syscall wrappers.
|
|---|
| 37 | */
|
|---|
| 38 |
|
|---|
| 39 | #include <syscall/syscall.h>
|
|---|
| 40 | #include <proc/thread.h>
|
|---|
| 41 | #include <proc/task.h>
|
|---|
| 42 | #include <proc/program.h>
|
|---|
| 43 | #include <main/shutdown.h>
|
|---|
| 44 | #include <mm/as.h>
|
|---|
| 45 | #include <mm/page.h>
|
|---|
| 46 | #include <arch.h>
|
|---|
| 47 | #include <debug.h>
|
|---|
| 48 | #include <interrupt.h>
|
|---|
| 49 | #include <ipc/sysipc.h>
|
|---|
| 50 | #include <synch/smc.h>
|
|---|
| 51 | #include <synch/syswaitq.h>
|
|---|
| 52 | #include <ddi/ddi.h>
|
|---|
| 53 | #include <ipc/event.h>
|
|---|
| 54 | #include <security/perm.h>
|
|---|
| 55 | #include <sysinfo/sysinfo.h>
|
|---|
| 56 | #include <console/console.h>
|
|---|
| 57 | #include <udebug/udebug.h>
|
|---|
| 58 | #include <log.h>
|
|---|
| 59 |
|
|---|
| 60 | static syshandler_t syscall_table[] = {
|
|---|
| 61 | /* System management syscalls. */
|
|---|
| 62 | [SYS_KIO] = (syshandler_t) sys_kio,
|
|---|
| 63 | [SYS_REBOOT] = (syshandler_t) sys_reboot,
|
|---|
| 64 |
|
|---|
| 65 | /* Thread and task related syscalls. */
|
|---|
| 66 | [SYS_THREAD_CREATE] = (syshandler_t) sys_thread_create,
|
|---|
| 67 | [SYS_THREAD_EXIT] = (syshandler_t) sys_thread_exit,
|
|---|
| 68 | [SYS_THREAD_GET_ID] = (syshandler_t) sys_thread_get_id,
|
|---|
| 69 | [SYS_THREAD_USLEEP] = (syshandler_t) sys_thread_usleep,
|
|---|
| 70 | [SYS_THREAD_UDELAY] = (syshandler_t) sys_thread_udelay,
|
|---|
| 71 |
|
|---|
| 72 | [SYS_TASK_GET_ID] = (syshandler_t) sys_task_get_id,
|
|---|
| 73 | [SYS_TASK_SET_NAME] = (syshandler_t) sys_task_set_name,
|
|---|
| 74 | [SYS_TASK_KILL] = (syshandler_t) sys_task_kill,
|
|---|
| 75 | [SYS_TASK_EXIT] = (syshandler_t) sys_task_exit,
|
|---|
| 76 | [SYS_PROGRAM_SPAWN_LOADER] = (syshandler_t) sys_program_spawn_loader,
|
|---|
| 77 |
|
|---|
| 78 | /* Synchronization related syscalls. */
|
|---|
| 79 | [SYS_WAITQ_CREATE] = (syshandler_t) sys_waitq_create,
|
|---|
| 80 | [SYS_WAITQ_SLEEP] = (syshandler_t) sys_waitq_sleep,
|
|---|
| 81 | [SYS_WAITQ_WAKEUP] = (syshandler_t) sys_waitq_wakeup,
|
|---|
| 82 | [SYS_WAITQ_DESTROY] = (syshandler_t) sys_waitq_destroy,
|
|---|
| 83 | [SYS_SMC_COHERENCE] = (syshandler_t) sys_smc_coherence,
|
|---|
| 84 |
|
|---|
| 85 | /* Address space related syscalls. */
|
|---|
| 86 | [SYS_AS_AREA_CREATE] = (syshandler_t) sys_as_area_create,
|
|---|
| 87 | [SYS_AS_AREA_RESIZE] = (syshandler_t) sys_as_area_resize,
|
|---|
| 88 | [SYS_AS_AREA_CHANGE_FLAGS] = (syshandler_t) sys_as_area_change_flags,
|
|---|
| 89 | [SYS_AS_AREA_GET_INFO] = (syshandler_t) sys_as_area_get_info,
|
|---|
| 90 | [SYS_AS_AREA_DESTROY] = (syshandler_t) sys_as_area_destroy,
|
|---|
| 91 |
|
|---|
| 92 | /* Page mapping related syscalls. */
|
|---|
| 93 | [SYS_PAGE_FIND_MAPPING] = (syshandler_t) sys_page_find_mapping,
|
|---|
| 94 |
|
|---|
| 95 | /* IPC related syscalls. */
|
|---|
| 96 | [SYS_IPC_CALL_ASYNC_FAST] = (syshandler_t) sys_ipc_call_async_fast,
|
|---|
| 97 | [SYS_IPC_CALL_ASYNC_SLOW] = (syshandler_t) sys_ipc_call_async_slow,
|
|---|
| 98 | [SYS_IPC_ANSWER_FAST] = (syshandler_t) sys_ipc_answer_fast,
|
|---|
| 99 | [SYS_IPC_ANSWER_SLOW] = (syshandler_t) sys_ipc_answer_slow,
|
|---|
| 100 | [SYS_IPC_FORWARD_FAST] = (syshandler_t) sys_ipc_forward_fast,
|
|---|
| 101 | [SYS_IPC_FORWARD_SLOW] = (syshandler_t) sys_ipc_forward_slow,
|
|---|
| 102 | [SYS_IPC_WAIT] = (syshandler_t) sys_ipc_wait_for_call,
|
|---|
| 103 | [SYS_IPC_POKE] = (syshandler_t) sys_ipc_poke,
|
|---|
| 104 | [SYS_IPC_HANGUP] = (syshandler_t) sys_ipc_hangup,
|
|---|
| 105 | [SYS_IPC_CONNECT_KBOX] = (syshandler_t) sys_ipc_connect_kbox,
|
|---|
| 106 |
|
|---|
| 107 | /* Event notification syscalls. */
|
|---|
| 108 | [SYS_IPC_EVENT_SUBSCRIBE] = (syshandler_t) sys_ipc_event_subscribe,
|
|---|
| 109 | [SYS_IPC_EVENT_UNSUBSCRIBE] = (syshandler_t) sys_ipc_event_unsubscribe,
|
|---|
| 110 | [SYS_IPC_EVENT_UNMASK] = (syshandler_t) sys_ipc_event_unmask,
|
|---|
| 111 |
|
|---|
| 112 | /* Permission related syscalls. */
|
|---|
| 113 | [SYS_PERM_GRANT] = (syshandler_t) sys_perm_grant,
|
|---|
| 114 | [SYS_PERM_REVOKE] = (syshandler_t) sys_perm_revoke,
|
|---|
| 115 |
|
|---|
| 116 | /* DDI related syscalls. */
|
|---|
| 117 | [SYS_PHYSMEM_MAP] = (syshandler_t) sys_physmem_map,
|
|---|
| 118 | [SYS_PHYSMEM_UNMAP] = (syshandler_t) sys_physmem_unmap,
|
|---|
| 119 | [SYS_DMAMEM_MAP] = (syshandler_t) sys_dmamem_map,
|
|---|
| 120 | [SYS_DMAMEM_UNMAP] = (syshandler_t) sys_dmamem_unmap,
|
|---|
| 121 | [SYS_IOSPACE_ENABLE] = (syshandler_t) sys_iospace_enable,
|
|---|
| 122 | [SYS_IOSPACE_DISABLE] = (syshandler_t) sys_iospace_disable,
|
|---|
| 123 |
|
|---|
| 124 | [SYS_IPC_IRQ_SUBSCRIBE] = (syshandler_t) sys_ipc_irq_subscribe,
|
|---|
| 125 | [SYS_IPC_IRQ_UNSUBSCRIBE] = (syshandler_t) sys_ipc_irq_unsubscribe,
|
|---|
| 126 |
|
|---|
| 127 | /* Sysinfo syscalls. */
|
|---|
| 128 | [SYS_SYSINFO_GET_KEYS_SIZE] = (syshandler_t) sys_sysinfo_get_keys_size,
|
|---|
| 129 | [SYS_SYSINFO_GET_KEYS] = (syshandler_t) sys_sysinfo_get_keys,
|
|---|
| 130 | [SYS_SYSINFO_GET_VAL_TYPE] = (syshandler_t) sys_sysinfo_get_val_type,
|
|---|
| 131 | [SYS_SYSINFO_GET_VALUE] = (syshandler_t) sys_sysinfo_get_value,
|
|---|
| 132 | [SYS_SYSINFO_GET_DATA_SIZE] = (syshandler_t) sys_sysinfo_get_data_size,
|
|---|
| 133 | [SYS_SYSINFO_GET_DATA] = (syshandler_t) sys_sysinfo_get_data,
|
|---|
| 134 |
|
|---|
| 135 | /* Kernel console syscalls. */
|
|---|
| 136 | [SYS_DEBUG_CONSOLE] = (syshandler_t) sys_debug_console,
|
|---|
| 137 |
|
|---|
| 138 | [SYS_KLOG] = (syshandler_t) sys_klog,
|
|---|
| 139 | [SYS_KIO_READ] = (syshandler_t) sys_kio_read,
|
|---|
| 140 | };
|
|---|
| 141 |
|
|---|
| 142 | /** Dispatch system call */
|
|---|
| 143 | sysarg_t syscall_handler(sysarg_t a1, sysarg_t a2, sysarg_t a3,
|
|---|
| 144 | sysarg_t a4, sysarg_t a5, sysarg_t a6, sysarg_t id)
|
|---|
| 145 | {
|
|---|
| 146 | /* Do userpace accounting */
|
|---|
| 147 | ipl_t ipl = interrupts_disable();
|
|---|
| 148 | thread_update_accounting(true);
|
|---|
| 149 | interrupts_restore(ipl);
|
|---|
| 150 |
|
|---|
| 151 | #ifdef CONFIG_UDEBUG
|
|---|
| 152 | /*
|
|---|
| 153 | * An istate_t-compatible record was created on the stack by the
|
|---|
| 154 | * low-level syscall handler. This is the userspace space state
|
|---|
| 155 | * structure.
|
|---|
| 156 | */
|
|---|
| 157 | THREAD->udebug.uspace_state = istate_get(THREAD);
|
|---|
| 158 |
|
|---|
| 159 | /*
|
|---|
| 160 | * Early check for undebugged tasks. We do not lock anything as this
|
|---|
| 161 | * test need not be precise in either direction.
|
|---|
| 162 | */
|
|---|
| 163 | if (THREAD->udebug.active)
|
|---|
| 164 | udebug_syscall_event(a1, a2, a3, a4, a5, a6, id, 0, false);
|
|---|
| 165 | #endif
|
|---|
| 166 |
|
|---|
| 167 | sysarg_t rc;
|
|---|
| 168 | if (id < sizeof_array(syscall_table)) {
|
|---|
| 169 | rc = syscall_table[id](a1, a2, a3, a4, a5, a6);
|
|---|
| 170 | } else {
|
|---|
| 171 | log(LF_OTHER, LVL_ERROR,
|
|---|
| 172 | "Task %" PRIu64 ": Unknown syscall %#" PRIxn, TASK->taskid, id);
|
|---|
| 173 | task_kill_self(true);
|
|---|
| 174 | }
|
|---|
| 175 |
|
|---|
| 176 | if (THREAD->interrupted)
|
|---|
| 177 | thread_exit();
|
|---|
| 178 |
|
|---|
| 179 | #ifdef CONFIG_UDEBUG
|
|---|
| 180 | if (THREAD->udebug.active) {
|
|---|
| 181 | udebug_syscall_event(a1, a2, a3, a4, a5, a6, id, rc, true);
|
|---|
| 182 |
|
|---|
| 183 | /*
|
|---|
| 184 | * Stopping point needed for tasks that only invoke
|
|---|
| 185 | * non-blocking system calls. Not needed if the task
|
|---|
| 186 | * is not being debugged (it cannot block here).
|
|---|
| 187 | */
|
|---|
| 188 | udebug_stoppable_begin();
|
|---|
| 189 | udebug_stoppable_end();
|
|---|
| 190 | }
|
|---|
| 191 |
|
|---|
| 192 | /* Clear userspace state pointer */
|
|---|
| 193 | THREAD->udebug.uspace_state = NULL;
|
|---|
| 194 | #endif
|
|---|
| 195 |
|
|---|
| 196 | /* Do kernel accounting */
|
|---|
| 197 | ipl = interrupts_disable();
|
|---|
| 198 | thread_update_accounting(false);
|
|---|
| 199 | interrupts_restore(ipl);
|
|---|
| 200 |
|
|---|
| 201 | return rc;
|
|---|
| 202 | }
|
|---|
| 203 |
|
|---|
| 204 | /** @}
|
|---|
| 205 | */
|
|---|
