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 #ifdef CONFIG_OLD_MCOUNT 20 bool old_mcount; 21 #endif 22 }; 23 24 static inline unsigned long ftrace_call_adjust(unsigned long addr) 25 { 26 /* With Thumb-2, the recorded addresses have the lsb set */ 27 return addr & ~1; 28 } 29 30 extern void ftrace_caller_old(void); 31 extern void ftrace_call_old(void); 32 #endif 33 34 #endif 35 36 #endif 37 38 #ifndef __ASSEMBLY__ 39 40 #if defined(CONFIG_FRAME_POINTER) && !defined(CONFIG_ARM_UNWIND) 41 /* 42 * return_address uses walk_stackframe to do it's work. If both 43 * CONFIG_FRAME_POINTER=y and CONFIG_ARM_UNWIND=y walk_stackframe uses unwind 44 * information. For this to work in the function tracer many functions would 45 * have to be marked with __notrace. So for now just depend on 46 * !CONFIG_ARM_UNWIND. 47 */ 48 49 void *return_address(unsigned int); 50 51 #else 52 53 static inline void *return_address(unsigned int level) 54 { 55 return NULL; 56 } 57 58 #endif 59 60 #define ftrace_return_address(n) return_address(n) 61 62 #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME 63 64 static inline bool arch_syscall_match_sym_name(const char *sym, 65 const char *name) 66 { 67 if (!strcmp(sym, "sys_mmap2")) 68 sym = "sys_mmap_pgoff"; 69 else if (!strcmp(sym, "sys_statfs64_wrapper")) 70 sym = "sys_statfs64"; 71 else if (!strcmp(sym, "sys_fstatfs64_wrapper")) 72 sym = "sys_fstatfs64"; 73 else if (!strcmp(sym, "sys_arm_fadvise64_64")) 74 sym = "sys_fadvise64_64"; 75 76 /* Ignore case since sym may start with "SyS" instead of "sys" */ 77 return !strcasecmp(sym, name); 78 } 79 80 #endif /* ifndef __ASSEMBLY__ */ 81 82 #endif /* _ASM_ARM_FTRACE */ 83