You specify the special name as follows:

.ARM.__at_address

Where address is the required address of the section, normalized to eight hexadecimal digits. You can specify this in hexadecimal or decimal. Sections in the form of .ARM.__at_address are referred to by the abbreviation __at.

Assigning variables to __at sections in C or C++ code

// place variable2 in a section called .ARM.__at_0x8000
int variable2 __attribute__((section(".ARM.__at_0x8000"))) = 10;