HelenOS sources

__CONTEXT_OFFSET_X19   34 uspace/lib/c/arch/arm64/include/libarch/fibril_context.h #define __CONTEXT_OFFSET_X19    0x10
__CONTEXT_OFFSET_X19   52 uspace/lib/c/arch/riscv64/include/libarch/fibril_context.h #define __CONTEXT_OFFSET_X19  0xa0