1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_ARM_FTRACE
3 #define _ASM_ARM_FTRACE
5 #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS
6 #define ARCH_SUPPORTS_FTRACE_OPS 1
9 #ifdef CONFIG_FUNCTION_TRACER
10 #define MCOUNT_ADDR ((unsigned long)(__gnu_mcount_nc))
11 #define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */
14 extern void mcount(void);
15 extern void __gnu_mcount_nc(void);
17 #ifdef CONFIG_DYNAMIC_FTRACE
18 struct dyn_arch_ftrace {
21 static inline unsigned long ftrace_call_adjust(unsigned long addr)
23 /* With Thumb-2, the recorded addresses have the lsb set */
27 extern void ftrace_caller_old(void);
28 extern void ftrace_call_old(void);
37 #if defined(CONFIG_FRAME_POINTER) && !defined(CONFIG_ARM_UNWIND)
39 * return_address uses walk_stackframe to do it's work. If both
40 * CONFIG_FRAME_POINTER=y and CONFIG_ARM_UNWIND=y walk_stackframe uses unwind
41 * information. For this to work in the function tracer many functions would
42 * have to be marked with __notrace. So for now just depend on
46 void *return_address(unsigned int);
50 static inline void *return_address(unsigned int level)
57 #define ftrace_return_address(n) return_address(n)
59 #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME
61 static inline bool arch_syscall_match_sym_name(const char *sym,
64 if (!strcmp(sym, "sys_mmap2"))
65 sym = "sys_mmap_pgoff";
66 else if (!strcmp(sym, "sys_statfs64_wrapper"))
68 else if (!strcmp(sym, "sys_fstatfs64_wrapper"))
69 sym = "sys_fstatfs64";
70 else if (!strcmp(sym, "sys_arm_fadvise64_64"))
71 sym = "sys_fadvise64_64";
73 /* Ignore case since sym may start with "SyS" instead of "sys" */
74 return !strcasecmp(sym, name);
77 #endif /* ifndef __ASSEMBLY__ */
79 #endif /* _ASM_ARM_FTRACE */