Changeset ec55358 in mainline

Timestamp:

2006-04-12T11:59:36Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

b7f364e

Parents:

1077d91

Message:

Kernel support for SYS_GET_TASK_ID syscall.

Location:

generic

Files:

• include/proc/task.h (modified) (1 diff)
• include/syscall/syscall.h (modified) (1 diff)
• src/proc/task.c (modified) (1 diff)
• src/syscall/syscall.c (modified) (1 diff)

generic/include/proc/task.h

@@ -60 +60 @@
 extern task_t *task_run_program(void *program_addr, char *name);
 
+extern __native sys_get_task_id(task_id_t *uspace_task_id);
+
 #endif

generic/include/syscall/syscall.h

@@ -39 +39 @@
         SYS_MMAP,
         SYS_MREMAP,
+        SYS_GET_TASK_ID,
         SYS_IPC_CALL_SYNC_FAST,
         SYS_IPC_CALL_SYNC,

generic/src/proc/task.c

@@ -156 +156 @@
 }
 
+/** Syscall for reading task ID from userspace.
+ *
+ * @param uaddr Userspace address of 8-byte buffer where to store current task ID.
+ *
+ * @return Always returns 0.
+ */
+__native sys_get_task_id(task_id_t *uspace_task_id)
+{
+        /*
+         * No need to acquire lock on TASK because taskid
+         * remains constant for the lifespan of the task.
+         */
+        copy_to_uspace(uspace_task_id, &TASK->taskid, sizeof(TASK->taskid));
+
+        return 0;
+}
+
 /** Print task list */
 void task_print_list(void)

generic/src/syscall/syscall.c

@@ -83 +83 @@
         sys_mmap,
         sys_mremap,
+        sys_get_task_id,
         sys_ipc_call_sync_fast,
         sys_ipc_call_sync,