126 lines
3.1 KiB
C
126 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2022 Loongson Technology Corporation Limited
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*/
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#ifndef _ASM_LOONGARCH_FTRACE_H
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#define _ASM_LOONGARCH_FTRACE_H
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#define FTRACE_PLT_IDX 0
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#define FTRACE_REGS_PLT_IDX 1
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#define NR_FTRACE_PLTS 2
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#ifdef CONFIG_FUNCTION_TRACER
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#define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */
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#ifndef __ASSEMBLY__
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#ifndef CONFIG_DYNAMIC_FTRACE
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#define mcount _mcount
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extern void _mcount(void);
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extern void prepare_ftrace_return(unsigned long self_addr, unsigned long callsite_sp, unsigned long old);
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#else
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struct dyn_ftrace;
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struct dyn_arch_ftrace { };
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#define ARCH_SUPPORTS_FTRACE_OPS 1
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#define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
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#define ftrace_init_nop ftrace_init_nop
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int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec);
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static inline unsigned long ftrace_call_adjust(unsigned long addr)
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{
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return addr;
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}
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void prepare_ftrace_return(unsigned long self_addr, unsigned long *parent);
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#endif /* CONFIG_DYNAMIC_FTRACE */
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#ifdef CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS
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struct ftrace_ops;
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struct ftrace_regs {
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struct pt_regs regs;
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};
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static __always_inline struct pt_regs *arch_ftrace_get_regs(struct ftrace_regs *fregs)
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{
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return &fregs->regs;
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}
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static __always_inline unsigned long
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ftrace_regs_get_instruction_pointer(struct ftrace_regs *fregs)
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{
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return instruction_pointer(&fregs->regs);
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}
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static __always_inline void
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ftrace_regs_set_instruction_pointer(struct ftrace_regs *fregs, unsigned long ip)
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{
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instruction_pointer_set(&fregs->regs, ip);
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}
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#define ftrace_regs_get_argument(fregs, n) \
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regs_get_kernel_argument(&(fregs)->regs, n)
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#define ftrace_regs_get_stack_pointer(fregs) \
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kernel_stack_pointer(&(fregs)->regs)
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#define ftrace_regs_return_value(fregs) \
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regs_return_value(&(fregs)->regs)
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#define ftrace_regs_set_return_value(fregs, ret) \
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regs_set_return_value(&(fregs)->regs, ret)
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#define ftrace_override_function_with_return(fregs) \
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override_function_with_return(&(fregs)->regs)
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#define ftrace_regs_query_register_offset(name) \
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regs_query_register_offset(name)
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#define ftrace_graph_func ftrace_graph_func
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void ftrace_graph_func(unsigned long ip, unsigned long parent_ip,
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struct ftrace_ops *op, struct ftrace_regs *fregs);
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#ifdef CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
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static inline void
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__arch_ftrace_set_direct_caller(struct pt_regs *regs, unsigned long addr)
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{
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regs->regs[13] = addr; /* t1 */
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}
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#define arch_ftrace_set_direct_caller(fregs, addr) \
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__arch_ftrace_set_direct_caller(&(fregs)->regs, addr)
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#endif /* CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS */
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* CONFIG_FUNCTION_TRACER */
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#ifndef __ASSEMBLY__
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#ifdef CONFIG_FUNCTION_GRAPH_TRACER
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struct fgraph_ret_regs {
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/* a0 - a1 */
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unsigned long regs[2];
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unsigned long fp;
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unsigned long __unused;
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};
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static inline unsigned long fgraph_ret_regs_return_value(struct fgraph_ret_regs *ret_regs)
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{
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return ret_regs->regs[0];
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}
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static inline unsigned long fgraph_ret_regs_frame_pointer(struct fgraph_ret_regs *ret_regs)
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{
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return ret_regs->fp;
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}
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#endif /* ifdef CONFIG_FUNCTION_GRAPH_TRACER */
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#endif
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#endif /* _ASM_LOONGARCH_FTRACE_H */
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