1 #include <linux/sched.h>
2 #include <linux/ftrace.h>
3 #include <asm/ptrace.h>
4 #include <asm/bitops.h>
5 #include <asm/stacktrace.h>
6 #include <asm/unwind.h>
8 bool unwind_next_frame(struct unwind_state *state)
10 struct stack_info *info = &state->stack_info;
12 if (unwind_done(state))
16 for (state->sp++; state->sp < info->end; state->sp++)
17 if (__kernel_text_address(*state->sp))
20 state->sp = info->next_sp;
22 } while (!get_stack_info(state->sp, state->task, info,
27 EXPORT_SYMBOL_GPL(unwind_next_frame);
29 void __unwind_start(struct unwind_state *state, struct task_struct *task,
30 struct pt_regs *regs, unsigned long *first_frame)
32 memset(state, 0, sizeof(*state));
35 state->sp = first_frame;
37 get_stack_info(first_frame, state->task, &state->stack_info,
40 if (!__kernel_text_address(*first_frame))
41 unwind_next_frame(state);
43 EXPORT_SYMBOL_GPL(__unwind_start);