1 #ifndef _ASM_X86_UNWIND_H 2 #define _ASM_X86_UNWIND_H 3 4 #include <linux/sched.h> 5 #include <linux/ftrace.h> 6 #include <asm/ptrace.h> 7 #include <asm/stacktrace.h> 8 9 struct unwind_state { 10 struct stack_info stack_info; 11 unsigned long stack_mask; 12 struct task_struct *task; 13 int graph_idx; 14 #ifdef CONFIG_FRAME_POINTER 15 unsigned long *bp, *orig_sp; 16 struct pt_regs *regs; 17 #else 18 unsigned long *sp; 19 #endif 20 }; 21 22 void __unwind_start(struct unwind_state *state, struct task_struct *task, 23 struct pt_regs *regs, unsigned long *first_frame); 24 25 bool unwind_next_frame(struct unwind_state *state); 26 27 unsigned long unwind_get_return_address(struct unwind_state *state); 28 29 static inline bool unwind_done(struct unwind_state *state) 30 { 31 return state->stack_info.type == STACK_TYPE_UNKNOWN; 32 } 33 34 static inline 35 void unwind_start(struct unwind_state *state, struct task_struct *task, 36 struct pt_regs *regs, unsigned long *first_frame) 37 { 38 first_frame = first_frame ? : get_stack_pointer(task, regs); 39 40 __unwind_start(state, task, regs, first_frame); 41 } 42 43 #ifdef CONFIG_FRAME_POINTER 44 45 static inline 46 unsigned long *unwind_get_return_address_ptr(struct unwind_state *state) 47 { 48 if (unwind_done(state)) 49 return NULL; 50 51 return state->regs ? &state->regs->ip : state->bp + 1; 52 } 53 54 static inline struct pt_regs *unwind_get_entry_regs(struct unwind_state *state) 55 { 56 if (unwind_done(state)) 57 return NULL; 58 59 return state->regs; 60 } 61 62 #else /* !CONFIG_FRAME_POINTER */ 63 64 static inline 65 unsigned long *unwind_get_return_address_ptr(struct unwind_state *state) 66 { 67 return NULL; 68 } 69 70 static inline struct pt_regs *unwind_get_entry_regs(struct unwind_state *state) 71 { 72 return NULL; 73 } 74 75 #endif /* CONFIG_FRAME_POINTER */ 76 77 #endif /* _ASM_X86_UNWIND_H */ 78