question about vmlinux.lds.in

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Dear all:
I find there is a section in vmlinux.lds defined as below:
 _got_start = .;
 .got                   : { *(.got) }
 _got_end = .;
 .got.plt               : { *(.got.plt) }
 .data                  : { *(.data) }
 _edata = .;

As far as I know, this file is used to generate vmlinux.lds and ld
will use it to combine compressed kernel, proper head.s, by different
cpu, and misc.c to zImage.

so I think the .got sections will be defined in obj codes in this
folder, compressed.
But I cannot get any information about got, could someone tell me
where it is and what it is used for?

appreciate your help,
miloody

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