entry

    fn entry() callconv(.naked) void {
        switch (builtin.cpu.arch) {
            .aarch64 => asm volatile (
                \\ mov x0, sp
                \\ b %[call]
                :
                : [call] "X" (&call),
            ),
            .riscv64 => asm volatile (
                \\ mv a0, sp
                \\ tail %[call]@plt
                :
                : [call] "X" (&call),
            ),
            .x86_64 => asm volatile (
                \\ leaq 8(%%rsp), %%rdi
                \\ jmp %[call:P]
                :
                : [call] "X" (&call),
            ),
            else => |arch| @compileError("unimplemented architecture: " ++ @tagName(arch)),
        }
    }