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)25 static 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)51 static 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)62 static 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