74 lines
1.4 KiB
C
74 lines
1.4 KiB
C
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/*
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* Blackfin ftrace code
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*
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* Copyright 2009 Analog Devices Inc.
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* Licensed under the GPL-2 or later.
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*/
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#ifndef __ASM_BFIN_FTRACE_H__
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#define __ASM_BFIN_FTRACE_H__
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#define MCOUNT_INSN_SIZE 6 /* sizeof "[++sp] = rets; call __mcount;" */
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#ifndef __ASSEMBLY__
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#ifdef CONFIG_DYNAMIC_FTRACE
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extern void _mcount(void);
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#define MCOUNT_ADDR ((unsigned long)_mcount)
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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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struct dyn_arch_ftrace {
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/* No extra data needed for Blackfin */
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};
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#endif
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#ifdef CONFIG_FRAME_POINTER
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#include <linux/mm.h>
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extern inline void *return_address(unsigned int level)
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{
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unsigned long *endstack, *fp, *ret_addr;
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unsigned int current_level = 0;
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if (level == 0)
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return __builtin_return_address(0);
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fp = (unsigned long *)__builtin_frame_address(0);
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endstack = (unsigned long *)PAGE_ALIGN((unsigned long)&level);
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while (((unsigned long)fp & 0x3) == 0 && fp &&
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(fp + 1) < endstack && current_level < level) {
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fp = (unsigned long *)*fp;
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current_level++;
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}
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if (((unsigned long)fp & 0x3) == 0 && fp &&
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(fp + 1) < endstack)
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ret_addr = (unsigned long *)*(fp + 1);
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else
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ret_addr = NULL;
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return ret_addr;
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}
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#else
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extern inline void *return_address(unsigned int level)
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{
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return NULL;
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}
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#endif /* CONFIG_FRAME_POINTER */
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#define ftrace_return_address(n) return_address(n)
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#endif /* __ASSEMBLY__ */
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#endif
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