The structure of the ret_stack array on the task struct is going to
change, and accessing it directly via the curr_ret_stack index will no
longer give the ret_stack entry that holds the return address. To access
that, architectures must now use ftrace_graph_get_ret_stack() to get the
associated ret_stack that matches the saved return address.
Cc: linux-sh@vger.kernel.org
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Rich Felker <dalias@libc.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
struct thread_info *tinfo, int *graph)
{
struct task_struct *task = tinfo->task;
+ struct ftrace_ret_stack *ret_stack;
unsigned long ret_addr;
- int index = task->curr_ret_stack;
if (addr != (unsigned long)return_to_handler)
return;
- if (!task->ret_stack || index < *graph)
+ if (!task->ret_stack)
return;
- index -= *graph;
- ret_addr = task->ret_stack[index].ret;
+ ret_stack = ftrace_graph_get_ret_stack(task, *graph);
+ if (!ret_stack)
+ return;
+
+ ret_addr = ret_stack->ret;
ops->address(data, ret_addr, 1);
* expected to find the real return address.
*/
if (pc == (unsigned long)&return_to_handler) {
- int index = current->curr_ret_stack;
+ struct ftrace_ret_stack *ret_stack;
+ ret_stack = ftrace_graph_get_ret_stack(current, 0);
+ if (ret_stack)
+ pc = ret_stack->ret;
/*
* We currently have no way of tracking how many
* return_to_handler()'s we've seen. If there is more
* than one patched return address on our stack,
* complain loudly.
*/
- WARN_ON(index > 0);
-
- pc = current->ret_stack[index].ret;
+ WARN_ON(ftrace_graph_get_ret_stack(current, 1);
}
#endif