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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 <mm/as.h>
  42. #include <print.h>
  43. #include <putchar.h>
  44. #include <errno.h>
  45. #include <arch.h>
  46. #include <debug.h>
  47. #include <ipc/sysipc.h>
  48. #include <synch/futex.h>
  49. #include <ddi/ddi.h>
  50. #include <security/cap.h>
  51. #include <syscall/copy.h>
  52. #include <sysinfo/sysinfo.h>
  53. #include <console/console.h>
  54. #include <console/klog.h>
  55.  
  56. /** Print using kernel facility
  57.  *
  58.  * Some simulators can print only through kernel. Userspace can use
  59.  * this syscall to facilitate it.
  60.  */
  61. static unative_t sys_io(int fd, const void * buf, size_t count)
  62. {
  63.     size_t i;
  64.     char *data;
  65.     int rc;
  66.  
  67.     if (count > PAGE_SIZE)
  68.         return ELIMIT;
  69.  
  70.     data = (char *) malloc(count, 0);
  71.     if (!data)
  72.         return ENOMEM;
  73.    
  74.     rc = copy_from_uspace(data, buf, count);
  75.     if (rc) {
  76.         free(data);
  77.         return rc;
  78.     }
  79.  
  80.     for (i = 0; i < count; i++)
  81.         putchar(data[i]);
  82.     free(data);
  83.    
  84.     return count;
  85. }
  86.  
  87. /** Tell kernel to get keyboard/console access again */
  88. static unative_t sys_debug_enable_console(void)
  89. {
  90.     arch_grab_console();
  91.     return 0;
  92. }
  93.  
  94. /** Print a hex integer into klog */
  95. static unative_t sys_debug_putint(unative_t i)
  96. {
  97.     klog_printf("[task:0x%x]", i);
  98.     return 0;
  99. }
  100.  
  101. /** Dispatch system call */
  102. unative_t syscall_handler(unative_t a1, unative_t a2, unative_t a3,
  103.     unative_t a4, unative_t a5, unative_t a6, unative_t id)
  104. {
  105.     unative_t rc;
  106.  
  107.     if (id < SYSCALL_END)
  108.         rc = syscall_table[id](a1, a2, a3, a4, a5, a6);
  109.     else {
  110.         klog_printf("TASK %llu: Unknown syscall id %lx", TASK->taskid,
  111.             id);
  112.         task_kill(TASK->taskid);
  113.         thread_exit();
  114.     }
  115.        
  116.     if (THREAD->interrupted)
  117.         thread_exit();
  118.    
  119.     return rc;
  120. }
  121.  
  122. syshandler_t syscall_table[SYSCALL_END] = {
  123.     (syshandler_t) sys_io,
  124.     (syshandler_t) sys_tls_set,
  125.    
  126.     /* Thread and task related syscalls. */
  127.     (syshandler_t) sys_thread_create,
  128.     (syshandler_t) sys_thread_exit,
  129.     (syshandler_t) sys_thread_get_id,
  130.     (syshandler_t) sys_task_get_id,
  131.    
  132.     /* Synchronization related syscalls. */
  133.     (syshandler_t) sys_futex_sleep_timeout,
  134.     (syshandler_t) sys_futex_wakeup,
  135.    
  136.     /* Address space related syscalls. */
  137.     (syshandler_t) sys_as_area_create,
  138.     (syshandler_t) sys_as_area_resize,
  139.     (syshandler_t) sys_as_area_change_flags,
  140.     (syshandler_t) sys_as_area_destroy,
  141.    
  142.     /* IPC related syscalls. */
  143.     (syshandler_t) sys_ipc_call_sync_fast,
  144.     (syshandler_t) sys_ipc_call_sync_slow,
  145.     (syshandler_t) sys_ipc_call_async_fast,
  146.     (syshandler_t) sys_ipc_call_async_slow,
  147.     (syshandler_t) sys_ipc_answer_fast,
  148.     (syshandler_t) sys_ipc_answer_slow,
  149.     (syshandler_t) sys_ipc_forward_fast,
  150.     (syshandler_t) sys_ipc_wait_for_call,
  151.     (syshandler_t) sys_ipc_hangup,
  152.     (syshandler_t) sys_ipc_register_irq,
  153.     (syshandler_t) sys_ipc_unregister_irq,
  154.    
  155.     /* Capabilities related syscalls. */
  156.     (syshandler_t) sys_cap_grant,
  157.     (syshandler_t) sys_cap_revoke,
  158.    
  159.     /* DDI related syscalls. */
  160.     (syshandler_t) sys_physmem_map,
  161.     (syshandler_t) sys_iospace_enable,
  162.     (syshandler_t) sys_preempt_control,
  163.    
  164.     /* Sysinfo syscalls */
  165.     (syshandler_t) sys_sysinfo_valid,
  166.     (syshandler_t) sys_sysinfo_value,
  167.    
  168.     /* Debug calls */
  169.     (syshandler_t) sys_debug_putint,
  170.     (syshandler_t) sys_debug_enable_console
  171. };
  172.  
  173. /** @}
  174.  */
  175.