For MMIX, there is a choice of generating
ELF object files or
mmo object files when linking. The simulator
mmo format. The binutils
can translate between the two formats.
There is one special section, the `.MMIX.reg_contents' section.
Contents in this section is assumed to correspond to that of global
registers, and symbols referring to it are translated to special symbols,
equal to registers. In a final link, the start address of the
`.MMIX.reg_contents' section corresponds to the first allocated
global register multiplied by 8. Register
$255 is not included in
this section; it is always set to the program entry, which is at the
Global symbols with the prefix
__.MMIX.start., for example
__.MMIX.start..data are special.
The default linker script uses these to set the default start address
of a section.
Initial and trailing multiples of zero-valued 32-bit words in a section, are left out from an mmo file.