HelenOS sources

ISTATE_OFFSET_X21   57 kernel/arch/arm64/include/arch/istate_struct.h #define ISTATE_OFFSET_X21    0xc8
ISTATE_OFFSET_X21   53 kernel/arch/riscv64/include/arch/istate_struct.h #define ISTATE_OFFSET_X21   0xa8
ISTATE_OFFSET_X21   57 uspace/lib/c/arch/arm64/include/libarch/istate_struct.h #define ISTATE_OFFSET_X21    0xc8
ISTATE_OFFSET_X21   53 uspace/lib/c/arch/riscv64/include/libarch/istate_struct.h #define ISTATE_OFFSET_X21   0xa8