Merge tag 'block-5.14-2021-08-07' of git://git.kernel.dk/linux-block
[linux-2.6-microblaze.git] / arch / arm / include / asm / ftrace.h
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 */