meaning of .section ".bstext", "ax"

[anil kumar <m.anilkumar80@xxxxxxxxx>]

Hello,
I am trying to understand assembly code written in arch/x86/boot/header.S code.
I am not able to grab meaning of following line:
 .section ".bstext", "ax"

Can you tell meaning of this line ?

Thanks,
Anil

PS: It would be great help if someone can point any link which explain
code mentioned in this file.
I am not able to locate any good link using google search engine.
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