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 #define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR 32 33 #define ftrace_init_nop ftrace_init_nop 34 int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec); 35 36 static inline unsigned long ftrace_call_adjust(unsigned long addr) 37 { 38 return addr; 39 } 40 41 void 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 46 struct ftrace_ops; 47 48 struct ftrace_regs { 49 struct pt_regs regs; 50 }; 51 52 static __always_inline struct pt_regs *arch_ftrace_get_regs(struct ftrace_regs *fregs) 53 { 54 return &fregs->regs; 55 } 56 57 #define ftrace_graph_func ftrace_graph_func 58 void ftrace_graph_func(unsigned long ip, unsigned long parent_ip, 59 struct ftrace_ops *op, struct ftrace_regs *fregs); 60 #endif 61 62 #endif /* __ASSEMBLY__ */ 63 64 #endif /* CONFIG_FUNCTION_TRACER */ 65 66 #endif /* _ASM_LOONGARCH_FTRACE_H */ 67