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[OLK-5.10] sw64: 实现show_stack方法
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guzitao
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2022-07-11 11:25
<!-- #请根据issue的类型在标题右侧下拉框中选择对应的选项（需求、缺陷或CVE等）--> <!-- #请根据issue相关的版本在里程碑中选择对应的节点，若是与版本无关，请选择“不关联里程碑”--> 实现show_stack方法 【环境信息】 软件信息： 1)4.19内核 【问题复现步骤】 1）修改show_stack实现 【预期结果】 根据fp和sp进行栈回溯 【实际结果】 触发panic,die_of_kernel调用show_stack结果: 1.有fp打印: Trace: [<ffffffff80918590>] walk_stackframe+0x0/0x140 [<ffffffff81820c48>] show_stack+0x5c/0x7c [<ffffffff809117ec>] die_if_kernel.part.0+0xcc/0x180 [<ffffffff809118e4>] die_if_kernel+0x44/0x50 [<ffffffff8091ec18>] do_page_fault+0x5f8/0x660 [<ffffffff80911080>] ret_from_sys_call+0x0/0x18 [<ffffffff810a61b0>] __handle_sysrq+0xc0/0x230 [<ffffffff810a6984>] write_sysrq_trigger+0x54/0x80 [<ffffffff80bcf4c0>] proc_reg_write+0x80/0x140 [<ffffffff80b2880c>] __vfs_write+0x3c/0x200 [<ffffffff80b28bf0>] vfs_write+0xf0/0x220 [<ffffffff80b28f98>] ksys_write+0x88/0x140 [<ffffffff80b29078>] sys_write+0x28/0x50 [<ffffffff8091106c>] entSys+0xbc/0xd0 2.没有fp,使用sp打印: Trace: [<ffffffff809179e0>] walk_stackframe+0x0/0x110 [<ffffffff8176f0bc>] show_stack+0x50/0x6c [<ffffffff80911770>] die_if_kernel.part.0+0xc0/0x180 [<ffffffff80911860>] die_if_kernel+0x30/0x40 [<ffffffff8091d3d4>] do_page_fault+0x5e4/0x650 [<ffffffff8091101c>] entSys+0xcc/0xd0 [<ffffffff809bd0d4>] vprintk_func+0x104/0x220 [<ffffffff8106c28c>] serial8250_put_poll_char+0x10c/0x110 [<ffffffff810464b4>] __handle_sysrq+0xb4/0x220 [<ffffffff8104534c>] ptm_open_peer+0x1ac/0x1b0 [<ffffffff81045368>] sysrq_handle_crash+0x18/0x30 [<ffffffff81046c38>] write_sysrq_trigger+0x48/0x70 [<ffffffff80baa0f4>] proc_reg_write+0x74/0x120 [<ffffffff80b0bb60>] __vfs_write+0x30/0x1e0 [<ffffffff80b0bf24>] vfs_write+0xe4/0x210 [<ffffffff80b3ce80>] f_dupfd+0xa0/0x120 [<ffffffff80b3b6f0>] ksys_dup3+0xb0/0x1e0 [<ffffffff80b0a620>] rw_verify_area+0x50/0x130 [<ffffffff80b0c034>] vfs_write+0x1f4/0x210 [<ffffffff80b0c26c>] ksys_write+0x7c/0x130 [<ffffffff80911008>] entSys+0xb8/0xd0 【解决过程】 修改并复用stacktrace.c中的函数,使所有有关内核追栈的功能能够统一调用一个接口.
<!-- #请根据issue的类型在标题右侧下拉框中选择对应的选项（需求、缺陷或CVE等）--> <!-- #请根据issue相关的版本在里程碑中选择对应的节点，若是与版本无关，请选择“不关联里程碑”--> 实现show_stack方法 【环境信息】 软件信息： 1)4.19内核 【问题复现步骤】 1）修改show_stack实现 【预期结果】 根据fp和sp进行栈回溯 【实际结果】 触发panic,die_of_kernel调用show_stack结果: 1.有fp打印: Trace: [<ffffffff80918590>] walk_stackframe+0x0/0x140 [<ffffffff81820c48>] show_stack+0x5c/0x7c [<ffffffff809117ec>] die_if_kernel.part.0+0xcc/0x180 [<ffffffff809118e4>] die_if_kernel+0x44/0x50 [<ffffffff8091ec18>] do_page_fault+0x5f8/0x660 [<ffffffff80911080>] ret_from_sys_call+0x0/0x18 [<ffffffff810a61b0>] __handle_sysrq+0xc0/0x230 [<ffffffff810a6984>] write_sysrq_trigger+0x54/0x80 [<ffffffff80bcf4c0>] proc_reg_write+0x80/0x140 [<ffffffff80b2880c>] __vfs_write+0x3c/0x200 [<ffffffff80b28bf0>] vfs_write+0xf0/0x220 [<ffffffff80b28f98>] ksys_write+0x88/0x140 [<ffffffff80b29078>] sys_write+0x28/0x50 [<ffffffff8091106c>] entSys+0xbc/0xd0 2.没有fp,使用sp打印: Trace: [<ffffffff809179e0>] walk_stackframe+0x0/0x110 [<ffffffff8176f0bc>] show_stack+0x50/0x6c [<ffffffff80911770>] die_if_kernel.part.0+0xc0/0x180 [<ffffffff80911860>] die_if_kernel+0x30/0x40 [<ffffffff8091d3d4>] do_page_fault+0x5e4/0x650 [<ffffffff8091101c>] entSys+0xcc/0xd0 [<ffffffff809bd0d4>] vprintk_func+0x104/0x220 [<ffffffff8106c28c>] serial8250_put_poll_char+0x10c/0x110 [<ffffffff810464b4>] __handle_sysrq+0xb4/0x220 [<ffffffff8104534c>] ptm_open_peer+0x1ac/0x1b0 [<ffffffff81045368>] sysrq_handle_crash+0x18/0x30 [<ffffffff81046c38>] write_sysrq_trigger+0x48/0x70 [<ffffffff80baa0f4>] proc_reg_write+0x74/0x120 [<ffffffff80b0bb60>] __vfs_write+0x30/0x1e0 [<ffffffff80b0bf24>] vfs_write+0xe4/0x210 [<ffffffff80b3ce80>] f_dupfd+0xa0/0x120 [<ffffffff80b3b6f0>] ksys_dup3+0xb0/0x1e0 [<ffffffff80b0a620>] rw_verify_area+0x50/0x130 [<ffffffff80b0c034>] vfs_write+0x1f4/0x210 [<ffffffff80b0c26c>] ksys_write+0x7c/0x130 [<ffffffff80911008>] entSys+0xb8/0xd0 【解决过程】 修改并复用stacktrace.c中的函数,使所有有关内核追栈的功能能够统一调用一个接口.
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