1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_ARM_FTRACE 3 #define _ASM_ARM_FTRACE 4 5 #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS 6 #define ARCH_SUPPORTS_FTRACE_OPS 1 7 #endif 8 9 #ifdef CONFIG_FUNCTION_TRACER 10 #define MCOUNT_ADDR ((unsigned long)(__gnu_mcount_nc)) 11 #define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */ 12 13 #ifndef __ASSEMBLY__ 14 extern void mcount(void); 15 extern void __gnu_mcount_nc(void); 16 17 #ifdef CONFIG_DYNAMIC_FTRACE 18 struct dyn_arch_ftrace { 19 }; 20 ftrace_call_adjust(unsigned long addr)21 static inline unsigned long ftrace_call_adjust(unsigned long addr) 22 { 23 /* With Thumb-2, the recorded addresses have the lsb set */ 24 return addr & ~1; 25 } 26 27 extern void ftrace_caller_old(void); 28 extern void ftrace_call_old(void); 29 #endif 30 31 #endif 32 33 #endif 34 35 #ifndef __ASSEMBLY__ 36 37 #if defined(CONFIG_FRAME_POINTER) && !defined(CONFIG_ARM_UNWIND) 38 /* 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 43 * !CONFIG_ARM_UNWIND. 44 */ 45 46 void *return_address(unsigned int); 47 48 #else 49 return_address(unsigned int level)50 static inline void *return_address(unsigned int level) 51 { 52 return NULL; 53 } 54 55 #endif 56 57 #define ftrace_return_address(n) return_address(n) 58 59 #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME 60 arch_syscall_match_sym_name(const char * sym,const char * name)61 static inline bool arch_syscall_match_sym_name(const char *sym, 62 const char *name) 63 { 64 if (!strcmp(sym, "sys_mmap2")) 65 sym = "sys_mmap_pgoff"; 66 else if (!strcmp(sym, "sys_statfs64_wrapper")) 67 sym = "sys_statfs64"; 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"; 72 73 /* Ignore case since sym may start with "SyS" instead of "sys" */ 74 return !strcasecmp(sym, name); 75 } 76 77 #endif /* ifndef __ASSEMBLY__ */ 78 79 #endif /* _ASM_ARM_FTRACE */ 80