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I've been using objdump to look at assembly code in Linux ELF binaries.
Sometimes there is an indirect jump through a jump table that is stored in the rodata (read-only data) section.
How to get objdump or any other tool to show me the contents of this data section?
I could execute the program and examine the relevant addresses in the debugger, but I don't want to do that because it has to be done interactively.
The ideal answer will identify a tool that will not only show me the contents but will let me control the display format, much as od does.
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you can use readelf and objdump to read parts of an elf file. You can also use 'hexdump filename' to get a hexdump of the contents of a binary file (this is likely only useful if you like reading machine code or you are writing an assembler).
An executable file using the ELF file format consists of an ELF header, followed by a program header table or a section header table, or both. particularities of the file. As you can see from the description above, an ELF file consists of two sections – an ELF header, and file data.
Trace32 command to read symbol contents from ELF file.
How to open an ELF file. On PCs, you can open an ELF file and launch the game or other application it contains using Dolphin, a cross-platform Nintendo Wii emulator. On a Nintendo Wii, you can open an ELF file by transferring the file to your Wii using an SD card and then opening the file via the Homebrew Channel.
objdump -s -j .rodata exefile gives a side-by-side hex/printable ASCII dump of the contents of the rodata section like:
Contents of section .rodata: 0000 67452301 efcdab89 67452301 efcdab89 gE#.....gE#..... 0010 64636261 68676665 64636261 68676665 dcbahgfedcbahgfe It doesn't look like there's anything in there to control formatting, but it's a start. You could always undump the hex and feed it to od, I suppose :)
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readelf -x .rodata hello_world.o gives:
Hex dump of section '.rodata': 0x00000000 48656c6c 6f20776f 726c6421 0a Hello world!. You should prefer readelf when possible since objdump simply does not show some sections like .symtab: Why does objdump not show .bss, .shstratab, .symtab and .strtab sections?
You can also extract the raw bytes with the techniques mentioned at: How do you extract only the contents of an ELF section and as mentioned by ysdx.
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