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  1. /*
  2.  * Copyright (c) 2005 Martin Decky
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  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
  15.  *   derived from this software without specific prior written permission.
  16.  *
  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
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  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
  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
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup generic
  30.  * @{
  31.  */
  32.  
  33. /**
  34.  * @file
  35.  * @brief Syscall table and syscall wrappers.
  36.  */
  37.  
  38. #include <syscall/syscall.h>
  39. #include <proc/thread.h>
  40. #include <proc/task.h>
  41. #include <proc/program.h>
  42. #include <mm/as.h>
  43. #include <print.h>
  44. #include <arch.h>
  45. #include <debug.h>
  46. #include <ddi/device.h>
  47. #include <ipc/sysipc.h>
  48. #include <synch/futex.h>
  49. #include <synch/smc.h>
  50. #include <ddi/ddi.h>
  51. #include <ipc/event.h>
  52. #include <security/cap.h>
  53. #include <sysinfo/sysinfo.h>
  54. #include <console/console.h>
  55. #include <udebug/udebug.h>
  56.  
  57. /** Print a hex integer into klog */
  58. static unative_t sys_debug_putint(unative_t i)
  59. {
  60.     printf("[task:0x%x]", i);
  61.     return 0;
  62. }
  63.  
  64. /** Dispatch system call */
  65. unative_t syscall_handler(unative_t a1, unative_t a2, unative_t a3,
  66.     unative_t a4, unative_t a5, unative_t a6, unative_t id)
  67. {
  68.     unative_t rc;
  69.  
  70. #ifdef CONFIG_UDEBUG
  71.     bool debug;
  72.  
  73.     /*
  74.      * Early check for undebugged tasks. We do not lock anything as this
  75.      * test need not be precise in either way.
  76.      */
  77.     debug = THREAD->udebug.active;
  78.    
  79.     if (debug) {
  80.         udebug_syscall_event(a1, a2, a3, a4, a5, a6, id, 0, false);
  81.     }
  82. #endif
  83.    
  84.     if (id < SYSCALL_END) {
  85.         rc = syscall_table[id](a1, a2, a3, a4, a5, a6);
  86.     } else {
  87.         printf("Task %" PRIu64": Unknown syscall %#" PRIxn, TASK->taskid, id);
  88.         task_kill(TASK->taskid);
  89.         thread_exit();
  90.     }
  91.    
  92.     if (THREAD->interrupted)
  93.         thread_exit();
  94.    
  95. #ifdef CONFIG_UDEBUG
  96.     if (debug) {
  97.         udebug_syscall_event(a1, a2, a3, a4, a5, a6, id, rc, true);
  98.    
  99.         /*
  100.          * Stopping point needed for tasks that only invoke
  101.          * non-blocking system calls. Not needed if the task
  102.          * is not being debugged (it cannot block here).
  103.          */
  104.         udebug_stoppable_begin();
  105.         udebug_stoppable_end();
  106.     }
  107. #endif
  108.    
  109.     return rc;
  110. }
  111.  
  112. syshandler_t syscall_table[SYSCALL_END] = {
  113.     (syshandler_t) sys_klog,
  114.     (syshandler_t) sys_tls_set,
  115.    
  116.     /* Thread and task related syscalls. */
  117.     (syshandler_t) sys_thread_create,
  118.     (syshandler_t) sys_thread_exit,
  119.     (syshandler_t) sys_thread_get_id,
  120.    
  121.     (syshandler_t) sys_task_get_id,
  122.     (syshandler_t) sys_task_set_name,
  123.     (syshandler_t) sys_program_spawn_loader,
  124.    
  125.     /* Synchronization related syscalls. */
  126.     (syshandler_t) sys_futex_sleep_timeout,
  127.     (syshandler_t) sys_futex_wakeup,
  128.     (syshandler_t) sys_smc_coherence,
  129.    
  130.     /* Address space related syscalls. */
  131.     (syshandler_t) sys_as_area_create,
  132.     (syshandler_t) sys_as_area_resize,
  133.     (syshandler_t) sys_as_area_change_flags,
  134.     (syshandler_t) sys_as_area_destroy,
  135.    
  136.     /* IPC related syscalls. */
  137.     (syshandler_t) sys_ipc_call_sync_fast,
  138.     (syshandler_t) sys_ipc_call_sync_slow,
  139.     (syshandler_t) sys_ipc_call_async_fast,
  140.     (syshandler_t) sys_ipc_call_async_slow,
  141.     (syshandler_t) sys_ipc_answer_fast,
  142.     (syshandler_t) sys_ipc_answer_slow,
  143.     (syshandler_t) sys_ipc_forward_fast,
  144.     (syshandler_t) sys_ipc_forward_slow,
  145.     (syshandler_t) sys_ipc_wait_for_call,
  146.     (syshandler_t) sys_ipc_hangup,
  147.     (syshandler_t) sys_ipc_register_irq,
  148.     (syshandler_t) sys_ipc_unregister_irq,
  149.  
  150.     /* Event notification syscalls. */
  151.     (syshandler_t) sys_event_subscribe,
  152.    
  153.     /* Capabilities related syscalls. */
  154.     (syshandler_t) sys_cap_grant,
  155.     (syshandler_t) sys_cap_revoke,
  156.    
  157.     /* DDI related syscalls. */
  158.     (syshandler_t) sys_device_assign_devno,
  159.     (syshandler_t) sys_physmem_map,
  160.     (syshandler_t) sys_iospace_enable,
  161.     (syshandler_t) sys_preempt_control,
  162.    
  163.     /* Sysinfo syscalls */
  164.     (syshandler_t) sys_sysinfo_valid,
  165.     (syshandler_t) sys_sysinfo_value,
  166.    
  167.     /* Debug calls */
  168.     (syshandler_t) sys_debug_putint,
  169.     (syshandler_t) sys_debug_enable_console,
  170.     (syshandler_t) sys_debug_disable_console,
  171.    
  172.     (syshandler_t) sys_ipc_connect_kbox
  173. };
  174.  
  175. /** @}
  176.  */
  177.