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 22extern void _mcount(void); 23extern void prepare_ftrace_return(unsigned long self_addr, unsigned long callsite_sp, unsigned long old); 24 25#else 26 27struct dyn_ftrace; 28struct dyn_arch_ftrace { }; 29 30#define ARCH_SUPPORTS_FTRACE_OPS 1 31#define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR 32 33#define ftrace_init_nop ftrace_init_nop 34int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec); 35 36static inline unsigned long ftrace_call_adjust(unsigned long addr) 37{ 38 return addr; 39} 40 41void prepare_ftrace_return(unsigned long self_addr, unsigned long *parent); 42 43#endif /* CONFIG_DYNAMIC_FTRACE */ 44 45#ifdef CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS 46struct ftrace_ops; 47 48struct ftrace_regs { 49 struct pt_regs regs; 50}; 51 52static __always_inline struct pt_regs *arch_ftrace_get_regs(struct ftrace_regs *fregs) 53{ 54 return &fregs->regs; 55} 56 57static __always_inline unsigned long 58ftrace_regs_get_instruction_pointer(struct ftrace_regs *fregs) 59{ 60 return instruction_pointer(&fregs->regs); 61} 62 63static __always_inline void 64ftrace_regs_set_instruction_pointer(struct ftrace_regs *fregs, unsigned long ip) 65{ 66 instruction_pointer_set(&fregs->regs, ip); 67} 68 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) 81 82#define ftrace_graph_func ftrace_graph_func 83void ftrace_graph_func(unsigned long ip, unsigned long parent_ip, 84 struct ftrace_ops *op, struct ftrace_regs *fregs); 85 86#ifdef CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS 87static inline void 88__arch_ftrace_set_direct_caller(struct pt_regs *regs, unsigned long addr) 89{ 90 regs->regs[13] = addr; /* t1 */ 91} 92 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 */ 96 97#endif 98 99#endif /* __ASSEMBLY__ */ 100 101#endif /* CONFIG_FUNCTION_TRACER */ 102 103#ifndef __ASSEMBLY__ 104#ifdef CONFIG_FUNCTION_GRAPH_TRACER 105struct fgraph_ret_regs { 106 /* a0 - a1 */ 107 unsigned long regs[2]; 108 109 unsigned long fp; 110 unsigned long __unused; 111}; 112 113static inline unsigned long fgraph_ret_regs_return_value(struct fgraph_ret_regs *ret_regs) 114{ 115 return ret_regs->regs[0]; 116} 117 118static inline unsigned long fgraph_ret_regs_frame_pointer(struct fgraph_ret_regs *ret_regs) 119{ 120 return ret_regs->fp; 121} 122#endif /* ifdef CONFIG_FUNCTION_GRAPH_TRACER */ 123#endif 124 125#endif /* _ASM_LOONGARCH_FTRACE_H */ 126