/usr/lib/gcc-cross/mips64-linux-gnuabi64/8/libgcc_s.so is in libgcc-8-dev-mips64-cross 8-20180414-1ubuntu2cross1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | /* GNU ld script
Use the shared library, but some functions are only in
the static library. */
GROUP ( libgcc_s.so.1 -lgcc )
|