Release 4.11 arch/x86/include/asm/unwind.h

#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, *orig_sp;
	
struct pt_regs *regs;
#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);

unsigned long unwind_get_return_address(struct unwind_state *state);



static inline bool unwind_done(struct unwind_state *state)
{
	return state->stack_info.type == STACK_TYPE_UNKNOWN;
}

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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);
}

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#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->regs ? &state->regs->ip : state->bp + 1;
}

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static inline struct pt_regs *unwind_get_entry_regs(struct unwind_state *state)
{
	if (unwind_done(state))
		return NULL;

	return state->regs;
}

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#else /* !CONFIG_FRAME_POINTER */


static inline

unsigned long *unwind_get_return_address_ptr(struct unwind_state *state)
{
	return NULL;
}

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static inline struct pt_regs *unwind_get_entry_regs(struct unwind_state *state)
{
	return NULL;
}

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#endif /* CONFIG_FRAME_POINTER */

#endif /* _ASM_X86_UNWIND_H */
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Directory: arch/x86/include/asm

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