Re: Function call difference between cygwin and Windows

[Václav Haisman <vhaisman at gmail dot com>]

On Fri, 19 Jul 2019 at 10:23, Biswapriyo Nath wrote:
>
> If a function calls both cygwin and Windows functions the binary creates
> extra subroutine (in assembly) for cygwin ones. Example:
>
> * Windows function:
>
>    call cs:CreatePipe
>
> * cygwin function:
>
>    call ioctl
>
>    ioctl proc near
>    jmp cs:__imp_ioctl
>    endp
>
> The binary is statically compiled. Why there are extra subroutines? Is this
> "by-design"? Or am I missing something?

This is how Windows DLLs work. See also
<https://stackoverflow.com/a/22688670/341065>.

-- 
VH

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