__asm__(
    ".att_syntax prefix\n"
    ".globl orbis_syscall\n"
    "orbis_syscall:\n"
    "  movq $0, %rax\n"
    "  movq %rcx, %r10\n"
    "  syscall\n"
    "  jb err\n"
    "  retq\n"
    "err:\n"
    "  pushq %rax\n"
    "  callq __error\n"
    "  popq %rcx\n"
    "  movl %ecx, 0(%rax)\n"
    "  movq $0xFFFFFFFFFFFFFFFF, %rax\n"
    "  movq $0xFFFFFFFFFFFFFFFF, %rdx\n"
    "  retq\n"
);