1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2022 Loongson Technology Corporation Limited
6 #ifndef _ASM_LOONGARCH_FTRACE_H
7 #define _ASM_LOONGARCH_FTRACE_H
9 #define FTRACE_PLT_IDX 0
10 #define FTRACE_REGS_PLT_IDX 1
11 #define NR_FTRACE_PLTS 2
13 #ifdef CONFIG_FUNCTION_TRACER
15 #define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */
19 #ifndef CONFIG_DYNAMIC_FTRACE
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);
28 struct dyn_arch_ftrace { };
30 #define ARCH_SUPPORTS_FTRACE_OPS 1
31 #define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
33 #define ftrace_init_nop ftrace_init_nop
34 int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec);
36 static inline unsigned long ftrace_call_adjust(unsigned long addr)
41 void prepare_ftrace_return(unsigned long self_addr, unsigned long *parent);
43 #endif /* CONFIG_DYNAMIC_FTRACE */
45 #ifdef CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS
52 static __always_inline struct pt_regs *arch_ftrace_get_regs(struct ftrace_regs *fregs)
57 static __always_inline unsigned long
58 ftrace_regs_get_instruction_pointer(struct ftrace_regs *fregs)
60 return instruction_pointer(&fregs->regs);
63 static __always_inline void
64 ftrace_regs_set_instruction_pointer(struct ftrace_regs *fregs, unsigned long ip)
66 regs_set_return_value(&fregs->regs, ip);
69 #define ftrace_regs_get_argument(fregs, n) \
70 regs_get_kernel_argument(&(fregs)->regs, n)
71 #define ftrace_regs_get_stack_pointer(fregs) \
72 kernel_stack_pointer(&(fregs)->regs)
73 #define ftrace_regs_return_value(fregs) \
74 regs_return_value(&(fregs)->regs)
75 #define ftrace_regs_set_return_value(fregs, ret) \
76 regs_set_return_value(&(fregs)->regs, ret)
77 #define ftrace_override_function_with_return(fregs) \
78 override_function_with_return(&(fregs)->regs)
79 #define ftrace_regs_query_register_offset(name) \
80 regs_query_register_offset(name)
82 #define ftrace_graph_func ftrace_graph_func
83 void ftrace_graph_func(unsigned long ip, unsigned long parent_ip,
84 struct ftrace_ops *op, struct ftrace_regs *fregs);
86 #ifdef CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
88 __arch_ftrace_set_direct_caller(struct pt_regs *regs, unsigned long addr)
90 regs->regs[13] = addr; /* t1 */
93 #define arch_ftrace_set_direct_caller(fregs, addr) \
94 __arch_ftrace_set_direct_caller(&(fregs)->regs, addr)
95 #endif /* CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS */
99 #endif /* __ASSEMBLY__ */
101 #endif /* CONFIG_FUNCTION_TRACER */
104 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
105 struct fgraph_ret_regs {
107 unsigned long regs[2];
110 unsigned long __unused;
113 static inline unsigned long fgraph_ret_regs_return_value(struct fgraph_ret_regs *ret_regs)
115 return ret_regs->regs[0];
118 static inline unsigned long fgraph_ret_regs_frame_pointer(struct fgraph_ret_regs *ret_regs)
122 #endif /* ifdef CONFIG_FUNCTION_GRAPH_TRACER */
125 #endif /* _ASM_LOONGARCH_FTRACE_H */