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 bool error; 15 #ifdef CONFIG_FRAME_POINTER 16 bool got_irq; 17 unsigned long *bp, *orig_sp; 18 struct pt_regs *regs; 19 unsigned long ip; 20 #else 21 unsigned long *sp; 22 #endif 23 }; 24 25 void __unwind_start(struct unwind_state *state, struct task_struct *task, 26 struct pt_regs *regs, unsigned long *first_frame); 27 28 bool unwind_next_frame(struct unwind_state *state); 29 30 unsigned long unwind_get_return_address(struct unwind_state *state); 31 32 static inline bool unwind_done(struct unwind_state *state) 33 { 34 return state->stack_info.type == STACK_TYPE_UNKNOWN; 35 } 36 37 static inline 38 void unwind_start(struct unwind_state *state, struct task_struct *task, 39 struct pt_regs *regs, unsigned long *first_frame) 40 { 41 first_frame = first_frame ? : get_stack_pointer(task, regs); 42 43 __unwind_start(state, task, regs, first_frame); 44 } 45 46 static inline bool unwind_error(struct unwind_state *state) 47 { 48 return state->error; 49 } 50 51 #ifdef CONFIG_FRAME_POINTER 52 53 static inline 54 unsigned long *unwind_get_return_address_ptr(struct unwind_state *state) 55 { 56 if (unwind_done(state)) 57 return NULL; 58 59 return state->regs ? &state->regs->ip : state->bp + 1; 60 } 61 62 static inline struct pt_regs *unwind_get_entry_regs(struct unwind_state *state) 63 { 64 if (unwind_done(state)) 65 return NULL; 66 67 return state->regs; 68 } 69 70 #else /* !CONFIG_FRAME_POINTER */ 71 72 static inline 73 unsigned long *unwind_get_return_address_ptr(struct unwind_state *state) 74 { 75 return NULL; 76 } 77 78 static inline struct pt_regs *unwind_get_entry_regs(struct unwind_state *state) 79 { 80 return NULL; 81 } 82 83 #endif /* CONFIG_FRAME_POINTER */ 84 85 #endif /* _ASM_X86_UNWIND_H */ 86