perf: perf can not parser the backtrace of app in the 32bit system and 64bit kernel.
Record PC value from regs[15], it should be regs[32], which cause perf parser the backtrace failed. Signed-off-by:Jiping Ma <jiping.ma2@windriver.com> Signed-off-by:
Bruce Ashfield <bruce.ashfield@gmail.com>
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