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  1. /** @addtogroup generic
  2.  * @{
  3.  */
  4.  
  5. /**
  6.  * @file
  7.  * @brief   Tdebug.
  8.  */
  9.  
  10. #include <synch/waitq.h>
  11. #include <console/klog.h>
  12. #include <udebug/udebug.h>
  13. #include <arch.h>
  14.  
  15. void udebug_stoppable_begin(void)
  16. {
  17.     int nsc;
  18.     call_t *db_call;
  19.     ipl_t ipl;
  20.  
  21.     ipl = interrupts_disable();
  22.     spinlock_lock(&TASK->lock);
  23.  
  24.     nsc = --TASK->not_stoppable_count;
  25.     db_call = TASK->debug_begin_call;
  26.  
  27.     if (TASK->dt_state == UDEBUG_TS_BEGINNING) {
  28.         klog_printf("udebug_stoppable_begin");
  29.         klog_printf(" - nsc := %d", nsc);
  30.     }
  31.  
  32.     if (TASK->dt_state == UDEBUG_TS_BEGINNING && nsc == 0) {
  33.         TASK->dt_state = UDEBUG_TS_ACTIVE;
  34.         TASK->debug_begin_call = NULL;
  35.         spinlock_unlock(&TASK->lock);
  36.         interrupts_restore(ipl);
  37.  
  38.         IPC_SET_RETVAL(db_call->data, 0);
  39.         klog_printf("udebug_stoppable_begin/ipc_answer");
  40.         ipc_answer(&TASK->answerbox, db_call);     
  41.     } else {
  42.             spinlock_unlock(&TASK->lock);
  43.         interrupts_restore(ipl);
  44.     }
  45. }
  46.  
  47. void udebug_stoppable_end(void)
  48. {
  49.     ipl_t ipl;
  50.  
  51. restart:
  52.     ipl = interrupts_disable();
  53.     spinlock_lock(&TASK->lock);
  54.  
  55.     if ((TASK->dt_state == UDEBUG_TS_BEGINNING ||
  56.         TASK->dt_state == UDEBUG_TS_ACTIVE) &&
  57.         THREAD->debug_stop == true) {
  58.         TASK->debug_begin_call = NULL;
  59.         spinlock_unlock(&TASK->lock);
  60.         interrupts_restore(ipl);
  61.  
  62.         klog_printf("udebug_stoppable_end: waitq_sleep");
  63.         waitq_sleep(&THREAD->go_wq);
  64.         goto restart;
  65.         /* must try again - have to lose stoppability atomically */
  66.     } else {
  67.         ++TASK->not_stoppable_count;
  68.         spinlock_unlock(&TASK->lock);
  69.         interrupts_restore(ipl);
  70.     }
  71. }
  72.  
  73. void udebug_syscall_event(unative_t a1, unative_t a2, unative_t a3,
  74.     unative_t a4, unative_t a5, unative_t a6, unative_t id, unative_t rc)
  75. {
  76.     call_t *call;
  77.     ipl_t ipl;
  78.  
  79.     ipl = interrupts_disable();
  80.     spinlock_lock(&THREAD->debug_lock);
  81.  
  82.     /* Must only generate events when in debugging session and have go */
  83.     if (THREAD->debug_active == true &&
  84.         THREAD->debug_stop == false) {
  85.         klog_printf("udebug_syscall_event");
  86.         call = THREAD->debug_go_call;
  87.         IPC_SET_RETVAL(call->data, 0);
  88.         IPC_SET_ARG1(call->data, UDEBUG_EVENT_SYSCALL);
  89.         IPC_SET_ARG2(call->data, id);
  90.         IPC_SET_ARG3(call->data, rc);
  91.         klog_printf("udebug_syscall_event/ipc_answer");
  92.  
  93.         THREAD->syscall_args[0] = a1;
  94.         THREAD->syscall_args[1] = a2;
  95.         THREAD->syscall_args[2] = a3;
  96.         THREAD->syscall_args[3] = a4;
  97.         THREAD->syscall_args[4] = a5;
  98.         THREAD->syscall_args[5] = a6;
  99.  
  100.         /*
  101.          * Make sure debug_stop is true when going to sleep
  102.          * in case we get woken up by DEBUG_END. (At which
  103.          * point it must be back to the initial true value).
  104.          */
  105.         THREAD->debug_stop = true;
  106.  
  107.         THREAD->cur_event = UDEBUG_EVENT_SYSCALL;
  108.         spinlock_unlock(&THREAD->debug_lock);
  109.  
  110.         spinlock_lock(&TASK->lock);
  111.         ipc_answer(&TASK->answerbox, THREAD->debug_go_call);
  112.         spinlock_unlock(&TASK->lock);
  113.  
  114.         interrupts_restore(ipl);
  115.  
  116.         waitq_sleep(&THREAD->go_wq);
  117.     } else {
  118.         spinlock_unlock(&THREAD->debug_lock);
  119.         interrupts_restore(ipl);
  120.     }
  121. }
  122.  
  123. /** @}
  124.  */
  125.