blob: b5a834c930656d7f5b69e81bab3755f71164d6bc (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
#include <linux/sched.h>
#include <linux/ftrace.h>
#include <asm/ptrace.h>
#include <asm/bitops.h>
#include <asm/stacktrace.h>
#include <asm/unwind.h>
bool unwind_next_frame(struct unwind_state *state)
{
struct stack_info *info = &state->stack_info;
if (unwind_done(state))
return false;
do {
for (state->sp++; state->sp < info->end; state->sp++)
if (__kernel_text_address(*state->sp))
return true;
state->sp = info->next_sp;
} while (!get_stack_info(state->sp, state->task, info,
&state->stack_mask));
return false;
}
EXPORT_SYMBOL_GPL(unwind_next_frame);
void __unwind_start(struct unwind_state *state, struct task_struct *task,
struct pt_regs *regs, unsigned long *first_frame)
{
memset(state, 0, sizeof(*state));
state->task = task;
state->sp = first_frame;
get_stack_info(first_frame, state->task, &state->stack_info,
&state->stack_mask);
if (!__kernel_text_address(*first_frame))
unwind_next_frame(state);
}
EXPORT_SYMBOL_GPL(__unwind_start);
|
