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 __gnu_mcount_nc(void); 15 16 #ifdef CONFIG_DYNAMIC_FTRACE 17 struct dyn_arch_ftrace { 18 }; 19 20 static inline unsigned long ftrace_call_adjust(unsigned long addr) 21 { 22 /* With Thumb-2, the recorded addresses have the lsb set */ 23 return addr & ~1; 24 } 25 #endif 26 27 #endif 28 29 #endif 30 31 #ifndef __ASSEMBLY__ 32 33 #if defined(CONFIG_FRAME_POINTER) && !defined(CONFIG_ARM_UNWIND) 34 /* 35 * return_address uses walk_stackframe to do it's work. If both 36 * CONFIG_FRAME_POINTER=y and CONFIG_ARM_UNWIND=y walk_stackframe uses unwind 37 * information. For this to work in the function tracer many functions would 38 * have to be marked with __notrace. So for now just depend on 39 * !CONFIG_ARM_UNWIND. 40 */ 41 42 void *return_address(unsigned int); 43 44 #else 45 46 static inline void *return_address(unsigned int level) 47 { 48 return NULL; 49 } 50 51 #endif 52 53 #define ftrace_return_address(n) return_address(n) 54 55 #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME 56 57 static inline bool arch_syscall_match_sym_name(const char *sym, 58 const char *name) 59 { 60 if (!strcmp(sym, "sys_mmap2")) 61 sym = "sys_mmap_pgoff"; 62 else if (!strcmp(sym, "sys_statfs64_wrapper")) 63 sym = "sys_statfs64"; 64 else if (!strcmp(sym, "sys_fstatfs64_wrapper")) 65 sym = "sys_fstatfs64"; 66 else if (!strcmp(sym, "sys_arm_fadvise64_64")) 67 sym = "sys_fadvise64_64"; 68 69 /* Ignore case since sym may start with "SyS" instead of "sys" */ 70 return !strcasecmp(sym, name); 71 } 72 73 #endif /* ifndef __ASSEMBLY__ */ 74 75 #endif /* _ASM_ARM_FTRACE */ 76