Merge tag 'vfio-v4.20-rc1.v2' of git://github.com/awilliam/linux-vfio
[sfrench/cifs-2.6.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 mcount(void);
15 extern void __gnu_mcount_nc(void);
16
17 #ifdef CONFIG_DYNAMIC_FTRACE
18 struct dyn_arch_ftrace {
19 };
20
21 static inline unsigned long ftrace_call_adjust(unsigned long addr)
22 {
23         /* With Thumb-2, the recorded addresses have the lsb set */
24         return addr & ~1;
25 }
26
27 extern void ftrace_caller_old(void);
28 extern void ftrace_call_old(void);
29 #endif
30
31 #endif
32
33 #endif
34
35 #ifndef __ASSEMBLY__
36
37 #if defined(CONFIG_FRAME_POINTER) && !defined(CONFIG_ARM_UNWIND)
38 /*
39  * return_address uses walk_stackframe to do it's work.  If both
40  * CONFIG_FRAME_POINTER=y and CONFIG_ARM_UNWIND=y walk_stackframe uses unwind
41  * information.  For this to work in the function tracer many functions would
42  * have to be marked with __notrace.  So for now just depend on
43  * !CONFIG_ARM_UNWIND.
44  */
45
46 void *return_address(unsigned int);
47
48 #else
49
50 static inline void *return_address(unsigned int level)
51 {
52         return NULL;
53 }
54
55 #endif
56
57 #define ftrace_return_address(n) return_address(n)
58
59 #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME
60
61 static inline bool arch_syscall_match_sym_name(const char *sym,
62                                                const char *name)
63 {
64         if (!strcmp(sym, "sys_mmap2"))
65                 sym = "sys_mmap_pgoff";
66         else if (!strcmp(sym, "sys_statfs64_wrapper"))
67                 sym = "sys_statfs64";
68         else if (!strcmp(sym, "sys_fstatfs64_wrapper"))
69                 sym = "sys_fstatfs64";
70         else if (!strcmp(sym, "sys_arm_fadvise64_64"))
71                 sym = "sys_fadvise64_64";
72
73         /* Ignore case since sym may start with "SyS" instead of "sys" */
74         return !strcasecmp(sym, name);
75 }
76
77 #endif /* ifndef __ASSEMBLY__ */
78
79 #endif /* _ASM_ARM_FTRACE */