The -Rz command line option sets the name of the section that the compiler emits zero-initialized data into. If no other options are given, the default name for the section is UDATA0.

You can control the name of the code section used by the compiler within a source file using the #pragma zeroedseg or by using CrossStudio to set the Zeroed Section Name property of the file or project.

Project property

Section Options > Zeroed Section Name