1 #ifndef _ASM_S390_FTRACE_H
2 #define _ASM_S390_FTRACE_H
4 #define ARCH_SUPPORTS_FTRACE_OPS 1
6 #define MCOUNT_INSN_SIZE 24
7 #define MCOUNT_RETURN_FIXUP 18
11 #define ftrace_return_address(n) __builtin_return_address(n)
14 void ftrace_caller(void);
16 extern char ftrace_graph_caller_end;
17 extern unsigned long ftrace_plt;
19 struct dyn_arch_ftrace { };
21 #define MCOUNT_ADDR ((unsigned long)_mcount)
22 #define FTRACE_ADDR ((unsigned long)ftrace_caller)
24 #define KPROBE_ON_FTRACE_NOP 0
25 #define KPROBE_ON_FTRACE_CALL 1
27 static inline unsigned long ftrace_call_adjust(unsigned long addr)
37 static inline void ftrace_generate_nop_insn(struct ftrace_insn *insn)
39 #ifdef CONFIG_FUNCTION_TRACER
42 insn->disp = MCOUNT_INSN_SIZE / 2;
46 static inline int is_ftrace_nop(struct ftrace_insn *insn)
48 #ifdef CONFIG_FUNCTION_TRACER
49 if (insn->disp == MCOUNT_INSN_SIZE / 2)
55 static inline void ftrace_generate_call_insn(struct ftrace_insn *insn,
58 #ifdef CONFIG_FUNCTION_TRACER
61 /* brasl r0,ftrace_caller */
62 target = is_module_addr((void *) ip) ? ftrace_plt : FTRACE_ADDR;
64 insn->disp = (target - ip) / 2;
68 #endif /* __ASSEMBLY__ */
69 #endif /* _ASM_S390_FTRACE_H */