调试linux内核死机
我是内核调试新手。下面是最后一条内核消息。据我所知，它正在试图访问空指针。但我不明白它为什么要关闭cup 0调试linux内核死机,linux,linux-kernel,arm,Linux,Linux Kernel,Arm,我是内核调试新手。下面是最后一条内核消息。据我所知，它正在试图访问空指针。但我不明白它为什么要关闭cup 0 Unable to handle kernel paging request at virtual address 40025694 [37655.473976] pgd = d7138000 [37655.474007] [40025694] *pgd=9ec1a831, *pte=bf2e659d, *ppte=00000000 [37655.474038] Internal err
Unable to handle kernel paging request at virtual address 40025694
[37655.473976] pgd = d7138000
[37655.474007] [40025694] *pgd=9ec1a831, *pte=bf2e659d, *ppte=00000000
[37655.474038] Internal error: Oops: 17 [#1] PREEMPT SMP
[37655.474038] Modules linked in:
[37655.474068] CPU: 1 Not tainted (3.0.21-g572d9be-00004-g4ec4db2 #1)
[37655.474099] PC is at vector_swi+0x28/0x88
[37655.474129] LR is at 0x40025698
[37655.474160] pc : c01065a8 lr : 40025698 psr : 60000093
[37655.474160] sp : d6eaffb0 ip : 4062c18c fp : 5ed97c24
[37655.474190] r10: 58702b64 r9 : 5ea56f98 r8 : 20000010
[37655.474221] r7 : 000000a8 r6 : 41b13530 r5 : 4062c270 r4 : 4062c140
[37655.474251] r3 : 00000000 r2 : ffffffff r1 : 00000001 r0 : 5ed97bd0
[37655.474251] Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment user
[37655.474282] Control: 10c5787d Table: 9ec3806a DAC: 00000015
[37655.474282]
[37655.474282] PC: 0xc0106528:
[37655.474312] 6528 e31100ff 1afffff0 e59d1040 e5bde03c e16ff001 f57ff01f e95d7fff e1a00000
[37655.474343] 6548 e28dd00c e1b0f00e eb01ae0e e1a096ad e1a09689 e5991000 e3a08001 e3110c01
[37655.474373] 6568 0affffec e1a0100d e3a00001 eb0006ef eaffffe8 e320f000 e24dd048 e88d1fff
[37655.474404] 6588 e28d803c e9486000 e14f8000 e58de03c e58d8040 e58d0044 e3180020 13a0a000
[37655.474434] 65a8 051ea004 e59fc0ac e59cc000 ee01cf10 f1080080 e1a096ad e1a09689 e28f809c
[37655.474465] 65c8 e3daa4ff 122a7609 159f808c e599a000 e92d0030 e31a0c01 1a000008 e3570f5e
[37655.474465] 65e8 e24fee13 3798f107 e28d1008 e3a08000 e357080f e2270000 2a001084 ea022377
[37655.474526] 6608 e1a02007 e28d1008 e3a00000 eb0006c7 e28fe014 e1a07000 e28d1008 e3570f5e
[37655.474526]
[37655.474526] SP: 0xd6eaff30:
[37655.474556] ff30 c004815c c004a2c0 c0c02080 0000000a c0d8a580 c017a2f0 c1ef1984 00000012
[37655.474587] ff50 ffffffff d6eaff9c 41b13530 000000a8 20000010 c010602c 5ed97bd0 00000001
[37655.474617] ff70 ffffffff 00000000 4062c140 4062c270 41b13530 000000a8 20000010 5ea56f98
[37655.474648] ff90 58702b64 5ed97c24 4062c18c d6eaffb0 40025698 c01065a8 60000093 ffffffff
[37655.474678] ffb0 5ed97bd0 00000001 ffffffff 00000000 4062c140 4062c270 41b13530 000000a8
[37655.474678] ffd0 5ed97bd0 5ea56f98 58702b64 5ed97c24 4062c18c 5ed97bc8 406283d7 40025698
[37655.474709] fff0 20000010 5ed97bd0 a8afc821 a8afcc21 e033cfc0 40eb3000 40eb6000 d6eb0058
[37655.474739] 0010 d75a9d68 0000079f 00100073 d6eb017d d6eb00cc d6e98f94 00000000 00000000
[37655.474770] Process UEventObserver (pid: 675, stack limit = 0xd6eae2f0)
[37655.474770] Stack: (0xd6eaffb0 to 0xd6eb0000)
[37655.474801] ffa0: 5ed97bd0 00000001 ffffffff 00000000
[37655.474801] ffc0: 4062c140 4062c270 41b13530 000000a8 5ed97bd0 5ea56f98 58702b64 5ed97c24
[37655.474831] ffe0: 4062c18c 5ed97bc8 406283d7 40025698 20000010 5ed97bd0 a8afc821 a8afcc21
[37655.474831] Code: e58d8040 e58d0044 e3180020 13a0a000 (051ea004)
[37655.474862] ---[ end trace 2416079997dfe426 ]---
[37655.474862] Kernel panic - not syncing: Fatal exception
[37655.474892] [<c010cdec>] (unwind_backtrace+0x0/0x12c) from [<c078872c>] (panic+0x80/0x1a4)
[37655.474923] [<c078872c>] (panic+0x80/0x1a4) from [<c010a578>] (die+0x1d4/0x21c)
[37655.474953] [<c010a578>] (die+0x1d4/0x21c) from [<c0111510>] (__do_kernel_fault+0x64/0x84)
[37655.474953] [<c0111510>] (__do_kernel_fault+0x64/0x84) from [<c0111798>] (do_page_fault+0x268/0x288)
[37655.474984] [<c0111798>] (do_page_fault+0x268/0x288) from [<c0100340>] (do_DataAbort+0x134/0x1a4)
[37655.474984] [<c0100340>] (do_DataAbort+0x134/0x1a4) from [<c010602c>] (__dabt_svc+0x4c/0x60)
[37655.475014] Exception stack(0xd6eaff68 to 0xd6eaffb0)
[37655.475014] ff60: 5ed97bd0 00000001 ffffffff 00000000 4062c140 4062c270
[37655.475014] ff80: 41b13530 000000a8 20000010 5ea56f98 58702b64 5ed97c24 4062c18c d6eaffb0
[37655.475045] ffa0: 40025698 c01065a8 60000093 ffffffff
[37655.475045] [<c010602c>] (__dabt_svc+0x4c/0x60) from [<c01065a8>] (vector_swi+0x28/0x88)
[37655.475075] CPU0: stopping
[37655.475075] [<c010cdec>] (unwind_backtrace+0x0/0x12c) from [<c010b438>] (handle_IPI+0x100/0x1d4)
[37655.475106] [<c010b438>] (handle_IPI+0x100/0x1d4) from [<c010044c>] (gic_handle_irq+0x9c/0xac)
[37655.475106] [<c010044c>] (gic_handle_irq+0x9c/0xac) from [<c0106094>] (__irq_svc+0x54/0x80)
[37655.475136] Exception stack(0xc874bc68 to 0xc874bcb0)
[37655.475136] bc60: d3cf4948 cd6dbd54 0000001f 00000000 b1d2a59d 5ea1f000
[37655.475136] bc80: d3cf4948 5ea1f000 00000000 c874a000 d2b9207c d7e55670 5ea1f02b c874bcb0
[37655.475167] bca0: c01eb894 c010bbb4 60000013 ffffffff
[37655.475167] [<c0106094>] (__irq_svc+0x54/0x80) from [<c010bbb4>] (flush_tlb_page+0x8c/0x98)
[37655.475197] [<c010bbb4>] (flush_tlb_page+0x8c/0x98) from [<c01eb894>] (ptep_clear_flush+0x30/0x38)
[37655.475197] [<c01eb894>] (ptep_clear_flush+0x30/0x38) from [<c01e743c>] (try_to_unmap_one+0xc4/0x3a4)
[37655.475228] [<c01e743c>] (try_to_unmap_one+0xc4/0x3a4) from [<c01e77a0>] (try_to_unmap_file+0x84/0x4b4)
[37655.475228] [<c01e77a0>] (try_to_unmap_file+0x84/0x4b4) from [<c01e80b0>] (try_to_unmap+0x34/0x4c)
[37655.475258] [<c01e80b0>] (try_to_unmap+0x34/0x4c) from [<c01d28dc>] (shrink_page_list+0x258/0x78c)
[37655.475258] [<c01d28dc>] (shrink_page_list+0x258/0x78c) from [<c01d31b4>] (shrink_inactive_list+0x1e0/0x330)
[37655.475289] [<c01d31b4>] (shrink_inactive_list+0x1e0/0x330) from [<c01d3704>] (shrink_zone+0x400/0x588)
[37655.475289] [<c01d3704>] (shrink_zone+0x400/0x588) from [<c01d3fd8>] (kswapd+0x594/0x970)
[37655.475319] [<c01d3fd8>] (kswapd+0x594/0x970) from [<c018e04c>] (kthread+0x80/0x88)
[37655.475319] [<c018e04c>] (kthread+0x80/0x88) from [<c01075c0>] (kernel_thread_exit+0x0/0x8)
无法处理虚拟地址40025694处的内核分页请求
[37655.473976]pgd=d7138000
[37655.474007][40025694]*pgd=9ec1a831，*pte=bf2e659d，*ppte=00000000
[37655.474038]内部错误：Oops:17[#1]抢占SMP
[37655.474038]模块链接到：
[37655.474068]CPU:1未受污染（3.0.21-g572d9be-00004-g4ec4db2#1）
[37655.474099]PC位于矢量_swi+0x28/0x88
[37655.474129]LR位于0x40025698
[37655.474160]pc:c01065a8 lr:40025698 psr:60000093
[37655.474160]sp:d6eaffb0 ip:4062c18c fp:5ed97c24
[37655.474190]r10:58702b64 r9:5ea56f98 r8:2000010
[37655.474221]r7:000000 A8 r6:41b13530 r5:4062c270 r4:4062c140
[37655.474251]r3:00000000 r2:ffffffff r1:00000001 r0:5ed97bd0
[37655.474251]标志：nZCv IRQs off FIQs on模式SVC_32 ISA ARM段用户
[37655.474282]控件：10c5787d表：9ec3806a DAC:00000015
[37655.474282]
[37655.474282]个人计算机：0xc0106528:
[37655.474312]6528 e31100ff 1afffff0 e59d1040 e5bde03c e16ff001 f57ff01f e95d7fff e1a00000
[37655.474343]6548 e28dd00c e1b0f00e eb01ae0e e1a096ad e1a09689 e5991000 e3a08001 e3110c01
[37655.474373]6568 0AFFFEC e1a0100d e3a00001 eb0006ef eaffffe8 e320f000 e24dd048 e88d1fff
[37655.474404]6588 e28d803c e9486000 e14f8000 e58de03c e58d8040 e58d0044 e3180020 13a0a000
[37655.474434]65a8 051ea004 e59fc0ac e59cc000 ee01cf10 f1080080 e1a096ad e1a09689 e28f809c
[37655.474465]65c8 e3daa4ff 122a7609 159f808c e599a000 e92d0030 e31a0c01 1a000008 e3570f5e
[37655.474465]65e8 e24fee13 3798f107 e28d1008 e3a08000 e357080f e2270000 2A00084 ea022377
[37655.474526]6608 e1a02007 e28d1008 e3a00000 eb0006c7 e28fe014 e1a07000 e28d1008 e3570f5e
[37655.474526]
[37655.474526]SP:0xd6eaff30:
[37655.474556]ff30 c004815c C004A2C02080 0000000 A c0d8a580 c017a2f0 c1ef1984 000000 12
[37655.474587]ff50 ffffffff d6eaff9c 41b13530 000000 A8 2000010 c010602c 5ed97bd0 0000000 1
[37655.474617]ff70 FFFFFF 00000000 4062c140 4062c270 41b13530 000000 A8 20000010 5ea56f98
[37655.474648]ff90 58702b64 5ed97c24 4062c18c d6eaffb0 40025698 c01065a8 60000093 FFFFFF
[37655.474678]ffb0 5ed97bd0 00000001 FFFFFF00000000 4062c140 4062c270 41b13530 000000 A8
[37655.474678]ffd0 5ed97bd0 5ea56f98 58702b64 5ed97c24 4062c18c 5ed97bc8 406283d7 40025698
[37655.474709]fff0 2000010 5ed97bd0 a8afc821 a8afcc21 e033cfc0 40eb3000 40eb6000 d6eb0058
[37655.474739]0010 d75a9d68 0000079f 00100073 d6eb017d d6eb00cc d6e98f94 00000000 00000000
[37655.474770]进程UEventObserver（pid:675，堆栈限制=0xd6eae2f0）
[37655.474770]堆栈：（0xd6eaffb0到0xd6eb0000）
[37655.474801]ffa0:5ED97BD00000001 FFFFFF00000000
[37655.474801]ffc0:4062c140 4062c270 41b13530 000000 A8 5ed97bd0 5ea56f98 58702b64 5ed97c24
[37655.474831]ffe0:4062c18c 5ed97bc8 406283d7 40025698 2000001 5ed97bd0 a8afc821 a8afcc21
[37655.474831]代码：e58d8040 e58d0044 e3180020 13a0a000（051ea004）
[37655.474862]--[end trace 2416079997dfe426]---
[37655.474862]内核死机-不同步：致命异常
[37655.474892][]（从[]（死机+0x80/0x1a4）展开回溯+0x0/0x12c）
[37655.474923][]（死区+0x80/0x1a4）从[]（模具+0x1d4/0x21c）
[37655.474953][]（die+0x1d4/0x21c）来自[]（内核故障+0x64/0x84）
[37655.474953][]（内核错误+0x64/0x84）来自[]（页面错误+0x268/0x288）
[37655.474984][]（do_page_fault+0x268/0x288）来自[]（do_DataAbort+0x134/0x1a4）
[37655.474984][]（数据中止+0x134/0x1a4）来自[]（数据中止+0x4c/0x60）
[37655.475014]异常堆栈（0xd6eaff68到0xd6eaffb0）
[37655.475014]ff60:5ed97bd0 0000000 1 FFFFFFFF00000000 4062c140 4062c270
[37655.475014]ff80:41b13530 000000 A8 20000010 5ea56f98 58702b64 5ed97c24 4062c18c d6eaffb0
[37655.475045]ffa0:40025698 c01065a8 60000093 FFFFFF
[37655.475045][]（u dabt_svc+0x4c/0x60）来自[]（向量swi+0x28/0x88）
[37655.475075]CPU0:停止
[37655.475075][]（从[]展开回溯+0x0/0x12c）（句柄+0x100/0x1d4）
[37655.475106][]（句柄IPI+0x100/0x1d4）来自[]（gic_句柄irq+0x9c/0xac）
[37655.475106][]（gic_句柄_irq+0x9c/0xac）来自[]（_irq_svc+0x54/0x80）
[37655.475136]异常堆栈（0xc874bc68到0xC874BCBB0）
[37655.475136]bc60:d3cf4948 cd6dbd54 000000 1F 00000000 b1d2a59d 5ea1f000
[37655.475136]bc80:d3cf4948 5ea1f000 00000000 c874a000 d2b9207c d7e55670 5ea1f02b C874BC00
[37655.475167]bca0:c01eb894 c010bbb4 60000013 FFFFFF
[37655.475167][]（irq svc+0x54/0x80）来自[]（刷新tlb页面+0x8c/0x98）
[37655.475197][]（刷新页面+0x8c/0x98）从[]（ptep清除刷新+0x30/0x38）
[37655.475197][]（ptep清除清除+0x30/0x38）从[]（尝试取消映射一个+0xc4/0x3a4）
[37655.475228][]（尝试从[]取消映射一个+0xc4/0x3a4）（尝试取消映射文件+0x84/0x4b4）
[37655.475228][]（尝试取消映射文件+0x84/0x4b4）从[]（尝试取消映射+0x34/0x4c）
[37655.475258][]（尝试从[]取消映射+0x34/0x4c）（收缩页面列表+0x258/0x78c）
[37655.475258][]（收缩页面列表+0x258/0x78c）自[]（收缩非活动列表+0x1e0/0x330）
[37655.475289][]（收缩非活动列表+0x1e0/0x330）自[]（收缩区域+0x400/0x588）
[37655.475289][]（收缩区+0x400/0x588）从[]（kswapd+0x594/0x970）
[37655.475319][]（kswapd+0x594/0x970）来自[]（kthread+0x80/0x88）
[37655.475319][]（kthread+0x80/0x88）来自[]（内核线程退出+0x0/0x8）
谢谢如果您无法重现oops，那么您唯一真正的方法就是查看内核的objdump，并将oops中转储的CPU状态与变量的位置相匹配。内核树中曾经有一个指南（由Linus自己编写！）：。然而，内核用户手册现在似乎有更多最新信息。该消息告诉您需要什么