diff options
Diffstat (limited to 'arch/loongarch/include/asm/ftrace.h')
-rw-r--r-- | arch/loongarch/include/asm/ftrace.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/ftrace.h b/arch/loongarch/include/asm/ftrace.h new file mode 100644 index 000000000000..90f9d3399b2a --- /dev/null +++ b/arch/loongarch/include/asm/ftrace.h @@ -0,0 +1,68 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2022 Loongson Technology Corporation Limited + */ + +#ifndef _ASM_LOONGARCH_FTRACE_H +#define _ASM_LOONGARCH_FTRACE_H + +#define FTRACE_PLT_IDX 0 +#define FTRACE_REGS_PLT_IDX 1 +#define NR_FTRACE_PLTS 2 + +#define GRAPH_FAKE_OFFSET (sizeof(struct pt_regs) - offsetof(struct pt_regs, regs[1])) + +#ifdef CONFIG_FUNCTION_TRACER + +#define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */ + +#ifndef __ASSEMBLY__ + +#ifndef CONFIG_DYNAMIC_FTRACE + +#define mcount _mcount +extern void _mcount(void); +extern void prepare_ftrace_return(unsigned long self_addr, unsigned long callsite_sp, unsigned long old); + +#else + +struct dyn_ftrace; +struct dyn_arch_ftrace { }; + +#define ARCH_SUPPORTS_FTRACE_OPS 1 +#define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR + +#define ftrace_init_nop ftrace_init_nop +int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec); + +static inline unsigned long ftrace_call_adjust(unsigned long addr) +{ + return addr; +} + +void prepare_ftrace_return(unsigned long self_addr, unsigned long *parent); + +#endif /* CONFIG_DYNAMIC_FTRACE */ + +#ifdef CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS +struct ftrace_ops; + +struct ftrace_regs { + struct pt_regs regs; +}; + +static __always_inline struct pt_regs *arch_ftrace_get_regs(struct ftrace_regs *fregs) +{ + return &fregs->regs; +} + +#define ftrace_graph_func ftrace_graph_func +void ftrace_graph_func(unsigned long ip, unsigned long parent_ip, + struct ftrace_ops *op, struct ftrace_regs *fregs); +#endif + +#endif /* __ASSEMBLY__ */ + +#endif /* CONFIG_FUNCTION_TRACER */ + +#endif /* _ASM_LOONGARCH_FTRACE_H */ |