1 #ifndef _ASM_S390_FTRACE_H
2 #define _ASM_S390_FTRACE_H
4 #define ARCH_SUPPORTS_FTRACE_OPS 1
6 #ifdef CC_USING_HOTPATCH
7 #define MCOUNT_INSN_SIZE 6
9 #define MCOUNT_INSN_SIZE 24
10 #define MCOUNT_RETURN_FIXUP 18
15 #define ftrace_return_address(n) __builtin_return_address(n)
18 void ftrace_caller(void);
20 extern char ftrace_graph_caller_end;
21 extern unsigned long ftrace_plt;
23 struct dyn_arch_ftrace { };
25 #define MCOUNT_ADDR ((unsigned long)_mcount)
26 #define FTRACE_ADDR ((unsigned long)ftrace_caller)
28 #define KPROBE_ON_FTRACE_NOP 0
29 #define KPROBE_ON_FTRACE_CALL 1
31 static inline unsigned long ftrace_call_adjust(unsigned long addr)
41 static inline void ftrace_generate_nop_insn(struct ftrace_insn *insn)
43 #ifdef CONFIG_FUNCTION_TRACER
44 #ifdef CC_USING_HOTPATCH
51 insn->disp = MCOUNT_INSN_SIZE / 2;
56 static inline int is_ftrace_nop(struct ftrace_insn *insn)
58 #ifdef CONFIG_FUNCTION_TRACER
59 #ifdef CC_USING_HOTPATCH
63 if (insn->disp == MCOUNT_INSN_SIZE / 2)
70 static inline void ftrace_generate_call_insn(struct ftrace_insn *insn,
73 #ifdef CONFIG_FUNCTION_TRACER
76 /* brasl r0,ftrace_caller */
77 target = is_module_addr((void *) ip) ? ftrace_plt : FTRACE_ADDR;
79 insn->disp = (target - ip) / 2;
83 #endif /* __ASSEMBLY__ */
84 #endif /* _ASM_S390_FTRACE_H */