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[J-linux.git] / arch / loongarch / include / asm / ftrace.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Copyright (C) 2022 Loongson Technology Corporation Limited
4  */
5
6 #ifndef _ASM_LOONGARCH_FTRACE_H
7 #define _ASM_LOONGARCH_FTRACE_H
8
9 #define FTRACE_PLT_IDX          0
10 #define FTRACE_REGS_PLT_IDX     1
11 #define NR_FTRACE_PLTS          2
12
13 #ifdef CONFIG_FUNCTION_TRACER
14
15 #define MCOUNT_INSN_SIZE 4              /* sizeof mcount call */
16
17 #ifndef __ASSEMBLY__
18
19 #ifndef CONFIG_DYNAMIC_FTRACE
20
21 #define mcount _mcount
22 extern void _mcount(void);
23 extern void prepare_ftrace_return(unsigned long self_addr, unsigned long callsite_sp, unsigned long old);
24
25 #else
26
27 struct dyn_ftrace;
28 struct dyn_arch_ftrace { };
29
30 #define ARCH_SUPPORTS_FTRACE_OPS 1
31
32 #define ftrace_init_nop ftrace_init_nop
33 int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec);
34
35 static inline unsigned long ftrace_call_adjust(unsigned long addr)
36 {
37         return addr;
38 }
39
40 void prepare_ftrace_return(unsigned long self_addr, unsigned long *parent);
41
42 #endif /* CONFIG_DYNAMIC_FTRACE */
43
44 #ifdef CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS
45 struct ftrace_ops;
46
47 #include <linux/ftrace_regs.h>
48
49 static __always_inline struct pt_regs *arch_ftrace_get_regs(struct ftrace_regs *fregs)
50 {
51         return &arch_ftrace_regs(fregs)->regs;
52 }
53
54 static __always_inline void
55 ftrace_regs_set_instruction_pointer(struct ftrace_regs *fregs, unsigned long ip)
56 {
57         instruction_pointer_set(&arch_ftrace_regs(fregs)->regs, ip);
58 }
59
60 #define ftrace_graph_func ftrace_graph_func
61 void ftrace_graph_func(unsigned long ip, unsigned long parent_ip,
62                        struct ftrace_ops *op, struct ftrace_regs *fregs);
63
64 #ifdef CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
65 static inline void
66 __arch_ftrace_set_direct_caller(struct pt_regs *regs, unsigned long addr)
67 {
68         regs->regs[13] = addr;  /* t1 */
69 }
70
71 #define arch_ftrace_set_direct_caller(fregs, addr) \
72         __arch_ftrace_set_direct_caller(&arch_ftrace_regs(fregs)->regs, addr)
73 #endif /* CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS */
74
75 #endif
76
77 #endif /* __ASSEMBLY__ */
78
79 #endif /* CONFIG_FUNCTION_TRACER */
80
81 #ifndef __ASSEMBLY__
82 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
83 struct fgraph_ret_regs {
84         /* a0 - a1 */
85         unsigned long regs[2];
86
87         unsigned long fp;
88         unsigned long __unused;
89 };
90
91 static inline unsigned long fgraph_ret_regs_return_value(struct fgraph_ret_regs *ret_regs)
92 {
93         return ret_regs->regs[0];
94 }
95
96 static inline unsigned long fgraph_ret_regs_frame_pointer(struct fgraph_ret_regs *ret_regs)
97 {
98         return ret_regs->fp;
99 }
100 #endif /* ifdef CONFIG_FUNCTION_GRAPH_TRACER */
101 #endif
102
103 #endif /* _ASM_LOONGARCH_FTRACE_H */
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