WebSVN – HelenOS – Diff – //branches/tracing/kernel/generic/src/udebug/udebug_ipc.c

  */
 /**
  * @file
  * @brief   Udebug IPC message handling.
+ *
+ * This module handles udebug IPC messages and calls the appropriate
+ * functions from the udebug_ops module which implement them.
  */
-#include <print.h>
 #include <proc/task.h>
 #include <proc/thread.h>
 #include <arch.h>
 #include <errno.h>
 #include <ipc/ipc.h>
+    }
     return 0;
+}
+/** Process a BEGIN call.
+ *
+ * Initiates a debugging session for the current task. The reply
+ * to this call may or may not be sent before this function returns.
+ *
+ * @param call  The call structure.
+ */
 static void udebug_receive_begin(call_t *call)
+{
     int rc;
     rc = udebug_begin(call);
         IPC_SET_RETVAL(call->data, rc);
         ipc_answer(&TASK->kernel_box, call);
         return;
+    }
+    /*
+     * If the initialization of the debugging session has finished,
+     * send a reply.
+     */
     if (rc != 0) {
         IPC_SET_RETVAL(call->data, 0);
         ipc_answer(&TASK->kernel_box, call);
+    }
+}
+/** Process an END call.
+ *
+ * Terminates the debugging session for the current task.
+ * @param call  The call structure.
+ */
 static void udebug_receive_end(call_t *call)
+{
     int rc;
     rc = udebug_end();
     IPC_SET_RETVAL(call->data, rc);
     ipc_answer(&TASK->kernel_box, call);
+}
+/** Process a SET_EVMASK call.
+ *
+ * Sets an event mask for the current debugging session.
+ * @param call  The call structure.
+ */
 static void udebug_receive_set_evmask(call_t *call)
+{
     int rc;
     udebug_evmask_t mask;
     IPC_SET_RETVAL(call->data, rc);
     ipc_answer(&TASK->kernel_box, call);
+}
+/** Process a GO call.
+ *
+ * Resumes execution of the specified thread.
+ * @param call  The call structure.
+ */
 static void udebug_receive_go(call_t *call)
+{
     thread_t *t;
     int rc;
-    //printf("debug_go()\n");
     t = (thread_t *)IPC_GET_ARG2(call->data);
     rc = udebug_go(t, call);
     if (rc < 0) {
         IPC_SET_RETVAL(call->data, rc);
         ipc_answer(&TASK->kernel_box, call);
         return;
+    }
+}
+/** Process a STOP call.
+ *
+ * Suspends execution of the specified thread.
+ * @param call  The call structure.
+ */
 static void udebug_receive_stop(call_t *call)
+{
     thread_t *t;
     int rc;
-    printf("debug_stop()\n");
     t = (thread_t *)IPC_GET_ARG2(call->data);
     rc = udebug_stop(t, call);
     IPC_SET_RETVAL(call->data, rc);
     ipc_answer(&TASK->kernel_box, call);
+}
+/** Process a THREAD_READ call.
+ *
+ * Reads the list of hashes of the (userspace) threads in the current task.
+ * @param call  The call structure.
+ */
 static void udebug_receive_thread_read(call_t *call)
+{
     unative_t uspace_addr;
     unative_t to_copy;
     unsigned total_bytes;
     call->buffer = buffer;
     ipc_answer(&TASK->kernel_box, call);
+}
+/** Process an ARGS_READ call.
+ *
+ * Reads the argument of a current syscall event (SYSCALL_B or SYSCALL_E).
+ * @param call  The call structure.
+ */
 static void udebug_receive_args_read(call_t *call)
+{
     thread_t *t;
     unative_t uspace_addr;
     int rc;
     call->buffer = NULL;
     ipc_answer(&TASK->kernel_box, call);
+}
+/** Process an MEM_READ call.
+ *
+ * Reads memory of the current (debugged) task.
+ * @param call  The call structure.
+ */
 static void udebug_receive_mem_read(call_t *call)
+{
     unative_t uspace_dst;
     unative_t uspace_src;
     unsigned size;
     ipc_answer(&TASK->kernel_box, call);
+}
-/**
- * Handle a debug call received on the kernel answerbox.
+/** Handle a debug call received on the kernel answerbox.
+ *
- * This is called by the kbox servicing thread.
+ * This is called by the kbox servicing thread. Verifies that the sender
+ * is indeed the debugger and calls the appropriate processing function.
  */
 void udebug_call_receive(call_t *call)
+{
     int debug_method;

Subversion Repositories HelenOS

(root)//branches/tracing/kernel/generic/src/udebug/udebug_ipc.c – Rev 3424 → 3471