Книга: Embedded Linux Primer: A Practical, Real-World Approach

5.1.1. The Image Object

5.1.1. The Image Object

After the vmlinux kernel ELF file has been built, the kernel build system continues to process the targets described in Table 5-1. The Image object is created from the vmlinux object. Image is basically the vmlinux ELF file stripped of redundant sections (notes and comments) and also stripped of any debugging symbols that might have been present. The following command is used for this:

xscale_be-objcopy -O binary -R .note -R .comment -S
vmlinux arch/arm/boot/Image

In the previous objcopy command, the -O option tells objcopy to generate a binary file, the -R option removes the ELF sections named .note and .comment, and the -S option is the flag to strip debugging symbols. Notice that objcopy takes the vmlinux ELF image as input and generates the target binary file called Image. In summary, Image is nothing more than the kernel proper in binary form stripped of debug symbols and the .note and .comment ELF sections.

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