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 __gnu_mcount_nc(void);
16 #ifdef CONFIG_DYNAMIC_FTRACE
17 struct dyn_arch_ftrace {
18 #ifdef CONFIG_ARM_MODULE_PLTS
23 static inline unsigned long ftrace_call_adjust(unsigned long addr)
25 /* With Thumb-2, the recorded addresses have the lsb set */
36 #if defined(CONFIG_FRAME_POINTER) && !defined(CONFIG_ARM_UNWIND)
38 * return_address uses walk_stackframe to do it's work. If both
39 * CONFIG_FRAME_POINTER=y and CONFIG_ARM_UNWIND=y walk_stackframe uses unwind
40 * information. For this to work in the function tracer many functions would
41 * have to be marked with __notrace. So for now just depend on
45 void *return_address(unsigned int);
49 static inline void *return_address(unsigned int level)
56 #define ftrace_return_address(n) return_address(n)
58 #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME
60 static inline bool arch_syscall_match_sym_name(const char *sym,
63 if (!strcmp(sym, "sys_mmap2"))
64 sym = "sys_mmap_pgoff";
65 else if (!strcmp(sym, "sys_statfs64_wrapper"))
67 else if (!strcmp(sym, "sys_fstatfs64_wrapper"))
68 sym = "sys_fstatfs64";
69 else if (!strcmp(sym, "sys_arm_fadvise64_64"))
70 sym = "sys_fadvise64_64";
72 /* Ignore case since sym may start with "SyS" instead of "sys" */
73 return !strcasecmp(sym, name);
76 #endif /* ifndef __ASSEMBLY__ */
78 #endif /* _ASM_ARM_FTRACE */