linux-kernel - lx-符号 : Python Exception Cannot access memory at address 0xff

Question

我正在尝试加载 lx-符号从内核。但它不断向我显示以下错误:

(gdb) lx-symbols
loading vmlinux
Python Exception <class 'gdb.MemoryError'> Cannot access memory at address 0xffffffff824fb470: 
Error occurred in Python command: Cannot access memory at address 0xffffffff824fb470

现在我成功加载了 lx-符号之前来自同一个版本(不确定这是否是正确的术语)但不知道为什么我可以再加载它。

现在，当我第一次通过 gdb 连接到远程机器时，它用来显示构建跟踪，如下所示:

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Reading symbols from ./vmlinux...done.
(gdb) target remote: 1235
Remote debugging using : 1235
native_safe_halt ()
    at /build/linux-hwe-22QmxS/linux-hwe-5.3.0/arch/x86/include/asm/irqflags.h:61
61    /build/linux-hwe-22QmxS/linux-hwe-5.3.0/arch/x86/include/asm/irqflags.h: No such file or directory.

现在，当我连接到远程内核时，它只向我显示:

(gdb) target remote :1235
Remote debugging using :1235
0xffffffff81a98522 in __irqentry_text_end ()

我注意到构建跟踪 /build/linux-hwe-22QmxS/linux-hwe-5.3.0/arch/x86/include/asm/irqflags.h:61
61 消失(我没有对配置或设置进行任何更改)。

这是 第二次 我面临同样的问题。第一次，我以为我不小心做了一些更改，但随着问题再次出现，这次我很确定我没有做任何更改。

我有我的 .gdbinit 文件路径正确。

add-auto-load-safe-path /../../ubuntu-bionic/debian/build/build-generic/vmlinux-gdb.py

我使用以下命令检查源是否正确加载:

(gdb) source /home/../../ubuntu-bionic/debian/build/build-generic/vmlinux-gdb.py

它没有给我任何错误。所以，我猜源正在正确加载。我只是不知道还能做什么。请帮忙。

Answer 1

尝试添加到内核启动参数“nokaslr”和/或使用 CONFIG_RANDOMIZE_BASE=n 构建