HelenOS sources

__CONTEXT_OFFSET_X20   35 uspace/lib/c/arch/arm64/include/libarch/fibril_context.h #define __CONTEXT_OFFSET_X20    0x18
__CONTEXT_OFFSET_X20   53 uspace/lib/c/arch/riscv64/include/libarch/fibril_context.h #define __CONTEXT_OFFSET_X20  0xa8