armbe kernel processing failure

[skochinsky]

Source: https://downloads.openwrt.org/releases/17.01.0/targets/ixp4xx/harddisk/lede-17.01.0-r3205-59508e3-ixp4xx-harddisk-ap1000-zImage

[+] Kernel successfully decompressed in-memory (the offsets that follow will be given relative to the decompressed binary)
[+] Version string: Linux version 4.4.50 ([email protected]) (gcc version 5.4.0 (LEDE GCC 5.4.0 r3103-1b51a49) ) #0 Mon Feb 20 17:13:44 2017
[+] Guessed architecture: armbe successfully in 0.81 seconds
Traceback (most recent call last):
  File "C:\Work\git\vmlinux-to-elf\vmlinux_to_elf\kallsyms_finder.py", line 200, in __init__
    self.find_kallsyms_names_uncompressed()
  File "C:\Work\git\vmlinux-to-elf\vmlinux_to_elf\kallsyms_finder.py", line 540, in find_kallsyms_names_uncompressed
    raise KallsymsNotFoundException('No embedded symbol table found in this kernel')
kallsyms_finder.KallsymsNotFoundException: No embedded symbol table found in this kernel

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Work\git\vmlinux-to-elf\vmlinux_to_elf\main.py", line 67, in <module>
    args.base_address, args.file_offset
  File "C:\Work\git\vmlinux-to-elf\vmlinux_to_elf\elf_symbolizer.py", line 44, in __init__
    kallsyms_finder = KallsymsFinder(file_contents, bit_size)
  File "C:\Work\git\vmlinux-to-elf\vmlinux_to_elf\kallsyms_finder.py", line 205, in __init__
    raise first_error
  File "C:\Work\git\vmlinux-to-elf\vmlinux_to_elf\kallsyms_finder.py", line 193, in __init__
    self.find_kallsyms_token_table()
  File "C:\Work\git\vmlinux-to-elf\vmlinux_to_elf\kallsyms_finder.py", line 423, in find_kallsyms_token_table
    raise KallsymsNotFoundException('%d candidates for kallsyms_token_table in kernel image' % len(candidates_offsets))
kallsyms_finder.KallsymsNotFoundException: 0 candidates for kallsyms_token_table in kernel image

BTW, can you add a "fallaback" mode which writes a decompressed image (with or without ELF headers) on disk if kallsyms finder fails?

[marin-m]

Hello,

Source: https://downloads.openwrt.org/releases/17.01.0/targets/ixp4xx/harddisk/lede-17.01.0-r3205-59508e3-ixp4xx-harddisk-ap1000-zImage

May not there just be no kernel symbols table within this file, just like the kernel that you shared in your latest comment of issue #3?

BTW, can you add a "fallaback" mode which writes a decompressed image (with or without ELF headers) on disk if kallsyms finder fails?

I added a branch with a simple entry point to just perform the decompression feature and to output a raw file afterwards (see commit 40d767d), where the corresponding executable entry point is named kernel-raw-decompressor in order to avoid confusion with vmlinux-to-elf, does the naming look right and do you think I should merge it to the master branch?

I also note that the kernel that you shared in the current issue can also be decompressed using 7-Zip.

Regards,