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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 <syscall/copy.h>
  47.  
  48. static __native sys_io(int fd, const void * buf, size_t count) {
  49.    
  50.     // TODO: buf sanity checks and a lot of other stuff ...
  51.  
  52.     size_t i;
  53.    
  54.     for (i = 0; i < count; i++)
  55.         putchar(((char *) buf)[i]);
  56.    
  57.     return count;
  58. }
  59.  
  60. static __native sys_preempt_control(int enable)
  61. {
  62.     if (! cap_get(TASK) & CAP_PREEMPT_CONTROL)
  63.         return EPERM;
  64.     if (enable)
  65.         preemption_enable();
  66.     else
  67.         preemption_disable();
  68.     return 0;
  69. }
  70.  
  71. /** Dispatch system call */
  72. __native syscall_handler(__native a1, __native a2, __native a3,
  73.              __native a4, __native id)
  74. {
  75.     if (id < SYSCALL_END)
  76.         return syscall_table[id](a1,a2,a3,a4);
  77.     else
  78.         panic("Undefined syscall %d", id);
  79. }
  80.  
  81. syshandler_t syscall_table[SYSCALL_END] = {
  82.     sys_io,
  83.     sys_tls_set,
  84.     sys_preempt_control,
  85.  
  86.     /* Thread and task related syscalls. */
  87.     sys_thread_create,
  88.     sys_thread_exit,
  89.     sys_task_get_id,
  90.    
  91.     /* Synchronization related syscalls. */
  92.     sys_futex_sleep_timeout,
  93.     sys_futex_wakeup,
  94.    
  95.     /* Address space related syscalls. */
  96.     sys_as_area_create,
  97.     sys_as_area_resize,
  98.     sys_as_area_accept,
  99.     sys_as_area_send,
  100.  
  101.     /* IPC related syscalls. */
  102.     sys_ipc_call_sync_fast,
  103.     sys_ipc_call_sync,
  104.     sys_ipc_call_async_fast,
  105.     sys_ipc_call_async,
  106.     sys_ipc_answer_fast,
  107.     sys_ipc_answer,
  108.     sys_ipc_forward_fast,
  109.     sys_ipc_wait_for_call,
  110.     sys_ipc_hangup,
  111.     sys_ipc_register_irq,
  112.     sys_ipc_unregister_irq,
  113.  
  114.     /* DDI related syscalls. */
  115.     sys_physmem_map,
  116.     sys_iospace_enable
  117. };
  118.