Re: [boost] [Style] Import a C function with wrong signature on purpose

Subject: Re: [boost] [Style] Import a C function with wrong signature on purpose
From: Klemens Morgenstern (klemens.morgenstern_at_[hidden])
Date: 2016-05-02 18:11:29

Am 02.05.2016 um 23:22 schrieb Andrey Semashev:
> On Tuesday, 3 May 2016 00:21:38 MSK Klemens
> Morgenstern wrote:
>> But I guess if I do that
>>
>> void f(unsigned int) __asm__("f");
>>
>> I'll be tarred and feathered.
>
> Does that work with __dllimport functions?
>

I just tried that with gcc 5.1, that works. Though it of course is an 
utterly simple function.

#include <boost/detail/winapi/basic_types.hpp>

extern "C" {
BOOST_SYMBOL_IMPORT boost::detail::winapi::HANDLE_ WINAPI 
GetCurrentProcess(BOOST_DETAIL_WINAPI_VOID);
BOOST_SYMBOL_IMPORT void* WINAPI my_func() __asm__("GetCurrentProcess");

}
int main()
{
     std::cout << GetCurrentProcess() << std::endl;
     std::cout << my_func() << std::endl;
     return 0;
}

 From what I understand, the __asm__ only overrides the entry point and 
doesn't change anything else. If you want to have some fun with that you 
can redirect static member functions to plain C-functions etc.