forked from Minki/linux
eed542d696
Most archs with HAVE_ARCH_CALLER_ADDR have pretty much the same definitions of CALLER_ADDRx(n). Instead of duplicating the code for all the archs, define a ftrace_return_address0() and ftrace_return_address(n) that can be overwritten by the archs if they need to do something different. Instead of 7 macros in every arch, we now only have at most 2 (and actually only 1 as ftrace_return_address0() should be the same for all archs). The CALLER_ADDRx(n) will now be defined in linux/ftrace.h and use the ftrace_return_address*(n?) macros. This removes a lot of the duplicate code. Link: http://lkml.kernel.org/p/1400585464-30333-1-git-send-email-takahiro.akashi@linaro.org Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
41 lines
979 B
C
41 lines
979 B
C
/*
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* arch/xtensa/include/asm/ftrace.h
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2013 Tensilica Inc.
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*/
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#ifndef _XTENSA_FTRACE_H
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#define _XTENSA_FTRACE_H
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#include <asm/processor.h>
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#ifndef __ASSEMBLY__
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#define ftrace_return_address0 ({ unsigned long a0, a1; \
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__asm__ __volatile__ ( \
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"mov %0, a0\n" \
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"mov %1, a1\n" \
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: "=r"(a0), "=r"(a1)); \
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MAKE_PC_FROM_RA(a0, a1); })
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#ifdef CONFIG_FRAME_POINTER
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extern unsigned long return_address(unsigned level);
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#define ftrace_return_address(n) return_address(n)
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#endif
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#endif /* __ASSEMBLY__ */
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#ifdef CONFIG_FUNCTION_TRACER
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#define MCOUNT_ADDR ((unsigned long)(_mcount))
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#define MCOUNT_INSN_SIZE 3
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#ifndef __ASSEMBLY__
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extern void _mcount(void);
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#define mcount _mcount
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#endif /* __ASSEMBLY__ */
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#endif /* CONFIG_FUNCTION_TRACER */
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#endif /* _XTENSA_FTRACE_H */
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