• Qing Zhang's avatar
    LoongArch: Add guess unwinder support · 49232773
    Qing Zhang authored
    Name "guess unwinder" comes from x86, it scans the stack and reports
    every kernel text address it finds.
    
    Unwinders can be used by dump_stack() and other stacktrace functions.
    
    Three stages when we do unwind,
      1) unwind_start(), the prapare of unwinding, fill unwind_state.
      2) unwind_done(), judge whether the unwind process is finished or not.
      3) unwind_next_frame(), unwind the next frame.
    
    Add get_stack_info() to get stack info. At present we have irq stack and
    task stack. The next_sp is the key info between two types of stacks.
    
    Dividing unwinder helps to add new unwinders in the future.
    Signed-off-by: default avatarQing Zhang <zhangqing@loongson.cn>
    Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
    49232773
process.c 8.08 KB