In recent Linuxes, system libraries (in particular libc) are compiled to use XMM registers. In a few places x86-32 HotSpot calls out to runtime without preserving the XMM registers. Because register spilling to XMM registers is enabled in C2-generated code, register corruption occurs. We need to fix FPU save and restore to include XMM registers.

While this is reproduced on Linux, it is a generic x86-32 bug.