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