1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_S390_FTRACE_H
3 #define _ASM_S390_FTRACE_H
5 #define ARCH_SUPPORTS_FTRACE_OPS 1
7 #ifdef CC_USING_HOTPATCH
8 #define MCOUNT_INSN_SIZE 6
10 #define MCOUNT_INSN_SIZE 24
11 #define MCOUNT_RETURN_FIXUP 18
16 #define ftrace_return_address(n) __builtin_return_address(n)
19 void ftrace_caller(void);
21 extern char ftrace_graph_caller_end;
22 extern unsigned long ftrace_plt;
23 extern void *ftrace_func;
25 struct dyn_arch_ftrace { };
27 #define MCOUNT_ADDR ((unsigned long)_mcount)
28 #define FTRACE_ADDR ((unsigned long)ftrace_caller)
30 #define KPROBE_ON_FTRACE_NOP 0
31 #define KPROBE_ON_FTRACE_CALL 1
33 static inline unsigned long ftrace_call_adjust(unsigned long addr)
43 static inline void ftrace_generate_nop_insn(struct ftrace_insn *insn)
45 #ifdef CONFIG_FUNCTION_TRACER
46 #ifdef CC_USING_HOTPATCH
53 insn->disp = MCOUNT_INSN_SIZE / 2;
58 static inline int is_ftrace_nop(struct ftrace_insn *insn)
60 #ifdef CONFIG_FUNCTION_TRACER
61 #ifdef CC_USING_HOTPATCH
65 if (insn->disp == MCOUNT_INSN_SIZE / 2)
72 static inline void ftrace_generate_call_insn(struct ftrace_insn *insn,
75 #ifdef CONFIG_FUNCTION_TRACER
78 /* brasl r0,ftrace_caller */
79 target = is_module_addr((void *) ip) ? ftrace_plt : FTRACE_ADDR;
81 insn->disp = (target - ip) / 2;
85 #endif /* __ASSEMBLY__ */
86 #endif /* _ASM_S390_FTRACE_H */