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When STACKTRACE is enabled, we must pass fp as stack for unwind,
otherwise random value in stack will casue a dead loop.
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Reported-by: Lu Baoquan <lu.baoquan@intellif.com>
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Use STACKTRACE to optimize panic print more pretty and align registers
printing.
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
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This patch adds arch ptrace implementation, stack dump and bug.h.
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
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