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 #ifdef CONFIG_ARM_MODULE_PLTS 19 struct module *mod; 20 #endif 21 }; 22 23 static inline unsigned long ftrace_call_adjust(unsigned long addr) 24 { 25 /* With Thumb-2, the recorded addresses have the lsb set */ 26 return addr & ~1; 27 } 28 #endif 29 30 #endif 31 32 #endif 33 34 #ifndef __ASSEMBLY__ 35 36 #if defined(CONFIG_FRAME_POINTER) && !defined(CONFIG_ARM_UNWIND) 37 /* 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 42 * !CONFIG_ARM_UNWIND. 43 */ 44 45 void *return_address(unsigned int); 46 47 #else 48 49 static inline void *return_address(unsigned int level) 50 { 51 return NULL; 52 } 53 54 #endif 55 56 #define ftrace_return_address(n) return_address(n) 57 58 #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME 59 60 static inline bool arch_syscall_match_sym_name(const char *sym, 61 const char *name) 62 { 63 if (!strcmp(sym, "sys_mmap2")) 64 sym = "sys_mmap_pgoff"; 65 else if (!strcmp(sym, "sys_statfs64_wrapper")) 66 sym = "sys_statfs64"; 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"; 71 72 /* Ignore case since sym may start with "SyS" instead of "sys" */ 73 return !strcasecmp(sym, name); 74 } 75 76 #endif /* ifndef __ASSEMBLY__ */ 77 78 #endif /* _ASM_ARM_FTRACE */ 79