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#ifdef CONFIG_ARM_MODULE_PLTS
19	struct module *mod;
20#endif
21};
22
23static 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
45void *return_address(unsigned int);
46
47#else
48
49static 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
60static 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 */
79