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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. /**
  30.  * @file    syscall.c
  31.  * @brief   Syscall table and syscall wrappers.
  32.  */
  33.  
  34. #include <syscall/syscall.h>
  35. #include <proc/thread.h>
  36. #include <proc/task.h>
  37. #include <mm/as.h>
  38. #include <print.h>
  39. #include <putchar.h>
  40. #include <errno.h>
  41. #include <arch.h>
  42. #include <debug.h>
  43. #include <ipc/sysipc.h>
  44. #include <synch/futex.h>
  45. #include <ddi/ddi.h>
  46. #include <security/cap.h>
  47. #include <syscall/copy.h>
  48. #include <sysinfo/sysinfo.h>
  49. #include <console/console.h>
  50. #include <console/klog.h>
  51.  
  52. /** Print using kernel facility
  53.  *
  54.  * Some simulators can print only through kernel. Userspace can use
  55.  * this syscall to facilitate it.
  56.  */
  57. static __native sys_io(int fd, const void * buf, size_t count)
  58. {
  59.     size_t i;
  60.     char *data;
  61.     int rc;
  62.  
  63.     if (count > PAGE_SIZE)
  64.         return ELIMIT;
  65.  
  66.     data = malloc(count, 0);
  67.     if (!data)
  68.         return ENOMEM;
  69.    
  70.     rc = copy_from_uspace(data, buf, count);
  71.     if (rc) {
  72.         free(data);
  73.         return rc;
  74.     }
  75.  
  76.     for (i = 0; i < count; i++)
  77.         putchar(data[i]);
  78.     free(data);
  79.    
  80.     return count;
  81. }
  82.  
  83. /** Tell kernel to get keyboard/console access again */
  84. static __native sys_debug_enable_console(void)
  85. {
  86.     arch_grab_console();
  87.     return 0;
  88. }
  89.  
  90. /** Dispatch system call */
  91. __native syscall_handler(__native a1, __native a2, __native a3,
  92.              __native a4, __native id)
  93. {
  94.     __native rc;
  95.  
  96.     if (id < SYSCALL_END)
  97.         rc = syscall_table[id](a1,a2,a3,a4);
  98.     else {
  99.         klog_printf("TASK %lld: Unknown syscall id %d",TASK->taskid,id);
  100.         task_kill(TASK->taskid);
  101.         thread_exit();
  102.     }
  103.        
  104.     if (THREAD->interrupted)
  105.         thread_exit();
  106.    
  107.     return rc;
  108. }
  109.  
  110. syshandler_t syscall_table[SYSCALL_END] = {
  111.     sys_io,
  112.     sys_tls_set,
  113.    
  114.     /* Thread and task related syscalls. */
  115.     sys_thread_create,
  116.     sys_thread_exit,
  117.     sys_task_get_id,
  118.    
  119.     /* Synchronization related syscalls. */
  120.     sys_futex_sleep_timeout,
  121.     sys_futex_wakeup,
  122.    
  123.     /* Address space related syscalls. */
  124.     sys_as_area_create,
  125.     sys_as_area_resize,
  126.     sys_as_area_destroy,
  127.  
  128.     /* IPC related syscalls. */
  129.     sys_ipc_call_sync_fast,
  130.     sys_ipc_call_sync,
  131.     sys_ipc_call_async_fast,
  132.     sys_ipc_call_async,
  133.     sys_ipc_answer_fast,
  134.     sys_ipc_answer,
  135.     sys_ipc_forward_fast,
  136.     sys_ipc_wait_for_call,
  137.     sys_ipc_hangup,
  138.     sys_ipc_register_irq,
  139.     sys_ipc_unregister_irq,
  140.  
  141.     /* Capabilities related syscalls. */
  142.     sys_cap_grant,
  143.     sys_cap_revoke,
  144.  
  145.     /* DDI related syscalls. */
  146.     sys_physmem_map,
  147.     sys_iospace_enable,
  148.     sys_preempt_control,
  149.    
  150.     /* Sysinfo syscalls */
  151.     sys_sysinfo_valid,
  152.     sys_sysinfo_value,
  153.    
  154.     /* Debug calls */
  155.     sys_debug_enable_console
  156. };
  157.