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__
 
16extern void __gnu_mcount_nc(void);
17
18#ifdef CONFIG_DYNAMIC_FTRACE
19struct dyn_arch_ftrace {
20#ifdef CONFIG_ARM_MODULE_PLTS
21	struct module *mod;
22#endif
23};
24
25static 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
47void *return_address(unsigned int);
48
49#else
50
51static 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
62static 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
78void prepare_ftrace_return(unsigned long *parent, unsigned long self,
79			   unsigned long frame_pointer,
80			   unsigned long stack_pointer);
 
 
 
 
81
82#endif /* ifndef __ASSEMBLY__ */
83
84#endif /* _ASM_ARM_FTRACE */

 
 1#ifndef _ASM_ARM_FTRACE
 2#define _ASM_ARM_FTRACE
 3
 
 
 
 
 
 
 4#ifdef CONFIG_FUNCTION_TRACER
 5#define MCOUNT_ADDR		((unsigned long)(__gnu_mcount_nc))
 6#define MCOUNT_INSN_SIZE	4 /* sizeof mcount call */
 7
 8#ifndef __ASSEMBLY__
 9extern void mcount(void);
10extern void __gnu_mcount_nc(void);
11
12#ifdef CONFIG_DYNAMIC_FTRACE
13struct dyn_arch_ftrace {
14#ifdef CONFIG_OLD_MCOUNT
15	bool	old_mcount;
16#endif
17};
18
19static inline unsigned long ftrace_call_adjust(unsigned long addr)
20{
21	/* With Thumb-2, the recorded addresses have the lsb set */
22	return addr & ~1;
23}
24
25extern void ftrace_caller_old(void);
26extern void ftrace_call_old(void);
27#endif
28
29#endif
30
31#endif
32
33#ifndef __ASSEMBLY__
34
35#if defined(CONFIG_FRAME_POINTER) && !defined(CONFIG_ARM_UNWIND)
36/*
37 * return_address uses walk_stackframe to do it's work.  If both
38 * CONFIG_FRAME_POINTER=y and CONFIG_ARM_UNWIND=y walk_stackframe uses unwind
39 * information.  For this to work in the function tracer many functions would
40 * have to be marked with __notrace.  So for now just depend on
41 * !CONFIG_ARM_UNWIND.
42 */
43
44void *return_address(unsigned int);
45
46#else
47
48extern inline void *return_address(unsigned int level)
49{
50	return NULL;
51}
52
53#endif
54
55#define HAVE_ARCH_CALLER_ADDR
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
56
57#define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))
58#define CALLER_ADDR1 ((unsigned long)return_address(1))
59#define CALLER_ADDR2 ((unsigned long)return_address(2))
60#define CALLER_ADDR3 ((unsigned long)return_address(3))
61#define CALLER_ADDR4 ((unsigned long)return_address(4))
62#define CALLER_ADDR5 ((unsigned long)return_address(5))
63#define CALLER_ADDR6 ((unsigned long)return_address(6))
64
65#endif /* ifndef __ASSEMBLY__ */
66
67#endif /* _ASM_ARM_FTRACE */