c5ac25e0d7
The prolugue unwinder rely on symbol info. When PC is not in kernel text address, it cannot find relative symbol info and it will be broken. The guess unwinder will be used in this case. And the guess unwinder code in prolugue unwinder is redundant. Strip it out and set the unwinder type in unwind_state. Make guess_unwinder::unwind_next_frame() as default way when other unwinders cannot unwind in some extreme case. Signed-off-by: Jinyang He <hejinyang@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
27 lines
686 B
C
27 lines
686 B
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2022 Loongson Technology Corporation Limited
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*/
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#include <asm/unwind.h>
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unsigned long unwind_get_return_address(struct unwind_state *state)
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{
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return __unwind_get_return_address(state);
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}
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EXPORT_SYMBOL_GPL(unwind_get_return_address);
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void unwind_start(struct unwind_state *state, struct task_struct *task,
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struct pt_regs *regs)
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{
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__unwind_start(state, task, regs);
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if (!unwind_done(state) && !__kernel_text_address(state->pc))
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unwind_next_frame(state);
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}
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EXPORT_SYMBOL_GPL(unwind_start);
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bool unwind_next_frame(struct unwind_state *state)
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{
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return default_next_frame(state);
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}
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EXPORT_SYMBOL_GPL(unwind_next_frame);
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