25 lines
663 B
C
25 lines
663 B
C
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// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
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#include <linux/ftrace.h>
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#include <linux/uaccess.h>
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extern void (*ftrace_trace_function)(unsigned long, unsigned long,
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struct ftrace_ops*, struct pt_regs*);
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noinline void __naked ftrace_stub(unsigned long ip, unsigned long parent_ip,
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struct ftrace_ops *op, struct pt_regs *regs)
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{
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asm volatile ("\n");
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}
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noinline void csky_mcount(unsigned long from_pc, unsigned long self_pc)
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{
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if (ftrace_trace_function != ftrace_stub)
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ftrace_trace_function(self_pc, from_pc, NULL, NULL);
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}
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/* _mcount is defined in abi's mcount.S */
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EXPORT_SYMBOL(_mcount);
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