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#ifndef _ASM_X86_UNWIND_H
#define _ASM_X86_UNWIND_H
#include <linux/sched.h>
#include <linux/ftrace.h>
#include <asm/ptrace.h>
#include <asm/stacktrace.h>
struct unwind_state {
struct stack_info stack_info;
unsigned long stack_mask;
struct task_struct *task;
int graph_idx;
#ifdef CONFIG_FRAME_POINTER
unsigned long *bp;
#else
unsigned long *sp;
#endif
};
void __unwind_start(struct unwind_state *state, struct task_struct *task,
struct pt_regs *regs, unsigned long *first_frame);
bool unwind_next_frame(struct unwind_state *state);
static inline bool unwind_done(struct unwind_state *state)
{
return state->stack_info.type == STACK_TYPE_UNKNOWN;
}
static inline
void unwind_start(struct unwind_state *state, struct task_struct *task,
struct pt_regs *regs, unsigned long *first_frame)
{
first_frame = first_frame ? : get_stack_pointer(task, regs);
__unwind_start(state, task, regs, first_frame);
}
#ifdef CONFIG_FRAME_POINTER
static inline
unsigned long *unwind_get_return_address_ptr(struct unwind_state *state)
{
if (unwind_done(state))
return NULL;
return state->bp + 1;
}
unsigned long unwind_get_return_address(struct unwind_state *state);
#else /* !CONFIG_FRAME_POINTER */
static inline
unsigned long *unwind_get_return_address_ptr(struct unwind_state *state)
{
return NULL;
}
static inline
unsigned long unwind_get_return_address(struct unwind_state *state)
{
if (unwind_done(state))
return 0;
return ftrace_graph_ret_addr(state->task, &state->graph_idx,
*state->sp, state->sp);
}
#endif /* CONFIG_FRAME_POINTER */
#endif /* _ASM_X86_UNWIND_H */
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