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Viewing changes to arch/blackfin/include/asm/ftrace.h

  • Committer: Package Import Robot
  • Author(s): Alessio Igor Bogani
  • Date: 2011-10-26 11:13:05 UTC
  • Revision ID: package-import@ubuntu.com-20111026111305-tz023xykf0i6eosh
Tags: upstream-3.2.0
Import upstream version 3.2.0

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arch/blackfin/include/asm/ftrace.h
 
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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 HAVE_ARCH_CALLER_ADDR
 
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/* inline function or macro may lead to unexpected result */
 
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#define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))
 
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#define CALLER_ADDR1 ((unsigned long)return_address(1))
 
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#define CALLER_ADDR2 ((unsigned long)return_address(2))
 
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#define CALLER_ADDR3 ((unsigned long)return_address(3))
 
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#define CALLER_ADDR4 ((unsigned long)return_address(4))
 
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#define CALLER_ADDR5 ((unsigned long)return_address(5))
 
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#define CALLER_ADDR6 ((unsigned long)return_address(6))
 
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#endif /* __ASSEMBLY__ */
 
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#endif