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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 <putchar.h>
  45. #include <errno.h>
  46. #include <arch.h>
  47. #include <debug.h>
  48. #include <ipc/sysipc.h>
  49. #include <synch/futex.h>
  50. #include <synch/smc.h>
  51. #include <ddi/ddi.h>
  52. #include <security/cap.h>
  53. #include <syscall/copy.h>
  54. #include <sysinfo/sysinfo.h>
  55. #include <console/console.h>
  56. #include <udebug/udebug.h>
  57.  
  58. /** Print using kernel facility
  59.  *
  60.  * Print to kernel log.
  61.  *
  62.  */
  63. static unative_t sys_klog(int fd, const void * buf, size_t count)
  64. {
  65.     char *data;
  66.     int rc;
  67.  
  68.     if (count > PAGE_SIZE)
  69.         return ELIMIT;
  70.    
  71.     if (count > 0) {
  72.         data = (char *) malloc(count + 1, 0);
  73.         if (!data)
  74.             return ENOMEM;
  75.        
  76.         rc = copy_from_uspace(data, buf, count);
  77.         if (rc) {
  78.             free(data);
  79.             return rc;
  80.         }
  81.         data[count] = 0;
  82.        
  83.         printf("%s", data);
  84.         free(data);
  85.     } else
  86.         klog_update();
  87.    
  88.     return count;
  89. }
  90.  
  91. /** Tell kernel to get keyboard/console access again */
  92. static unative_t sys_debug_enable_console(void)
  93. {
  94. #ifdef CONFIG_KCONSOLE
  95.     grab_console();
  96.     return true;
  97. #else
  98.     return false;
  99. #endif
  100. }
  101.  
  102. /** Tell kernel to relinquish keyboard/console access */
  103. static unative_t sys_debug_disable_console(void)
  104. {
  105.     release_console();
  106.     return true;
  107. }
  108.  
  109. /** Dispatch system call */
  110. unative_t syscall_handler(unative_t a1, unative_t a2, unative_t a3,
  111.     unative_t a4, unative_t a5, unative_t a6, unative_t id)
  112. {
  113.     unative_t rc;
  114.  
  115. #ifdef CONFIG_UDEBUG
  116.     udebug_syscall_event(a1, a2, a3, a4, a5, a6, id, 0, false);
  117. #endif
  118.     if (id < SYSCALL_END) {
  119.         rc = syscall_table[id](a1, a2, a3, a4, a5, a6);
  120.     } else {
  121.         printf("Task %" PRIu64": Unknown syscall %#" PRIxn, TASK->taskid, id);
  122.         task_kill(TASK->taskid);
  123.         thread_exit();
  124.     }
  125.        
  126.     if (THREAD->interrupted)
  127.         thread_exit();
  128.  
  129. #ifdef CONFIG_UDEBUG
  130.     udebug_syscall_event(a1, a2, a3, a4, a5, a6, id, rc, true);
  131.  
  132.     /*
  133.      * Stopping point needed for tasks that only invoke non-blocking
  134.      * system calls.
  135.      */
  136.     udebug_stoppable_begin();
  137.     udebug_stoppable_end();
  138. #endif 
  139.     return rc;
  140. }
  141.  
  142. syshandler_t syscall_table[SYSCALL_END] = {
  143.     (syshandler_t) sys_klog,
  144.     (syshandler_t) sys_tls_set,
  145.    
  146.     /* Thread and task related syscalls. */
  147.     (syshandler_t) sys_thread_create,
  148.     (syshandler_t) sys_thread_exit,
  149.     (syshandler_t) sys_thread_get_id,
  150.    
  151.     (syshandler_t) sys_task_get_id,
  152.     (syshandler_t) sys_task_set_name,
  153.     (syshandler_t) sys_program_spawn_loader,
  154.    
  155.     /* Synchronization related syscalls. */
  156.     (syshandler_t) sys_futex_sleep_timeout,
  157.     (syshandler_t) sys_futex_wakeup,
  158.     (syshandler_t) sys_smc_coherence,
  159.    
  160.     /* Address space related syscalls. */
  161.     (syshandler_t) sys_as_area_create,
  162.     (syshandler_t) sys_as_area_resize,
  163.     (syshandler_t) sys_as_area_change_flags,
  164.     (syshandler_t) sys_as_area_destroy,
  165.    
  166.     /* IPC related syscalls. */
  167.     (syshandler_t) sys_ipc_call_sync_fast,
  168.     (syshandler_t) sys_ipc_call_sync_slow,
  169.     (syshandler_t) sys_ipc_call_async_fast,
  170.     (syshandler_t) sys_ipc_call_async_slow,
  171.     (syshandler_t) sys_ipc_answer_fast,
  172.     (syshandler_t) sys_ipc_answer_slow,
  173.     (syshandler_t) sys_ipc_forward_fast,
  174.     (syshandler_t) sys_ipc_forward_slow,
  175.     (syshandler_t) sys_ipc_wait_for_call,
  176.     (syshandler_t) sys_ipc_hangup,
  177.     (syshandler_t) sys_ipc_register_irq,
  178.     (syshandler_t) sys_ipc_unregister_irq,
  179.    
  180.     /* Capabilities related syscalls. */
  181.     (syshandler_t) sys_cap_grant,
  182.     (syshandler_t) sys_cap_revoke,
  183.    
  184.     /* DDI related syscalls. */
  185.     (syshandler_t) sys_physmem_map,
  186.     (syshandler_t) sys_iospace_enable,
  187.     (syshandler_t) sys_preempt_control,
  188.    
  189.     /* Sysinfo syscalls */
  190.     (syshandler_t) sys_sysinfo_valid,
  191.     (syshandler_t) sys_sysinfo_value,
  192.    
  193.     /* Debug calls */
  194.     (syshandler_t) sys_debug_enable_console,
  195.     (syshandler_t) sys_debug_disable_console,
  196.    
  197.     (syshandler_t) sys_ipc_connect_kbox
  198. };
  199.  
  200. /** @}
  201.  */
  202.