Ability to locate segments arbitrarily in code memory

With the Keil Compiler linker, it is possible to specify the
absolute memory address of a code segment for a specific
function call. This is useful when setting aside a region of
code memory for a seperate piece of code such as a
bootloader, whose address you wish to specify explicitly.

For example, the Keil linker directive

CODE(?PR?*?OSOverwrite(0x7800))

will place the OSOverwrite() function at adress 0x7800 in
code space.

Would it be feasible to implement a similar option in the
sdcc linker?