1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_ARM_FTRACE 3 #define _ASM_ARM_FTRACE 4 5 #define HAVE_FUNCTION_GRAPH_FP_TEST 6 7 #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS 8 #define ARCH_SUPPORTS_FTRACE_OPS 1 9 #endif 10 11 #ifdef CONFIG_FUNCTION_TRACER 12 #define MCOUNT_ADDR ((unsigned long)(__gnu_mcount_nc)) 13 #define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */ 14 15 #ifndef __ASSEMBLY__ 16 extern void __gnu_mcount_nc(void); 17 18 #ifdef CONFIG_DYNAMIC_FTRACE 19 struct dyn_arch_ftrace { 20 #ifdef CONFIG_ARM_MODULE_PLTS 21 struct module *mod; 22 #endif 23 }; 24 ftrace_call_adjust(unsigned long addr)25static inline unsigned long ftrace_call_adjust(unsigned long addr) 26 { 27 /* With Thumb-2, the recorded addresses have the lsb set */ 28 return addr & ~1; 29 } 30 #endif 31 32 #endif 33 34 #endif 35 36 #ifndef __ASSEMBLY__ 37 38 #if defined(CONFIG_FRAME_POINTER) && !defined(CONFIG_ARM_UNWIND) 39 /* 40 * return_address uses walk_stackframe to do it's work. If both 41 * CONFIG_FRAME_POINTER=y and CONFIG_ARM_UNWIND=y walk_stackframe uses unwind 42 * information. For this to work in the function tracer many functions would 43 * have to be marked with __notrace. So for now just depend on 44 * !CONFIG_ARM_UNWIND. 45 */ 46 47 void *return_address(unsigned int); 48 49 #else 50 return_address(unsigned int level)51static inline void *return_address(unsigned int level) 52 { 53 return NULL; 54 } 55 56 #endif 57 58 #define ftrace_return_address(n) return_address(n) 59 60 #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME 61 arch_syscall_match_sym_name(const char * sym,const char * name)62static inline bool arch_syscall_match_sym_name(const char *sym, 63 const char *name) 64 { 65 if (!strcmp(sym, "sys_mmap2")) 66 sym = "sys_mmap_pgoff"; 67 else if (!strcmp(sym, "sys_statfs64_wrapper")) 68 sym = "sys_statfs64"; 69 else if (!strcmp(sym, "sys_fstatfs64_wrapper")) 70 sym = "sys_fstatfs64"; 71 else if (!strcmp(sym, "sys_arm_fadvise64_64")) 72 sym = "sys_fadvise64_64"; 73 74 /* Ignore case since sym may start with "SyS" instead of "sys" */ 75 return !strcasecmp(sym, name); 76 } 77 78 #endif /* ifndef __ASSEMBLY__ */ 79 80 #endif /* _ASM_ARM_FTRACE */ 81