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 #define GRAPH_FAKE_OFFSET (sizeof(struct pt_regs) - offsetof(struct pt_regs, regs[1])) 14 15 #ifdef CONFIG_FUNCTION_TRACER 16 17 #define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */ 18 19 #ifndef __ASSEMBLY__ 20 21 #ifndef CONFIG_DYNAMIC_FTRACE 22 23 #define mcount _mcount 24 extern void _mcount(void); 25 extern void prepare_ftrace_return(unsigned long self_addr, unsigned long callsite_sp, unsigned long old); 26 27 #else 28 29 struct dyn_ftrace; 30 struct dyn_arch_ftrace { }; 31 32 #define ARCH_SUPPORTS_FTRACE_OPS 1 33 #define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR 34 35 #define ftrace_init_nop ftrace_init_nop 36 int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec); 37 38 static inline unsigned long ftrace_call_adjust(unsigned long addr) 39 { 40 return addr; 41 } 42 43 void prepare_ftrace_return(unsigned long self_addr, unsigned long *parent); 44 45 #endif /* CONFIG_DYNAMIC_FTRACE */ 46 47 #ifdef CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS 48 struct ftrace_ops; 49 50 struct ftrace_regs { 51 struct pt_regs regs; 52 }; 53 54 static __always_inline struct pt_regs *arch_ftrace_get_regs(struct ftrace_regs *fregs) 55 { 56 return &fregs->regs; 57 } 58 59 #define ftrace_graph_func ftrace_graph_func 60 void ftrace_graph_func(unsigned long ip, unsigned long parent_ip, 61 struct ftrace_ops *op, struct ftrace_regs *fregs); 62 #endif 63 64 #endif /* __ASSEMBLY__ */ 65 66 #endif /* CONFIG_FUNCTION_TRACER */ 67 68 #endif /* _ASM_LOONGARCH_FTRACE_H */ 69