Ok.
Thanks Kai
2018-03-11 23:29 GMT+01:00 Martin Storsjö <mar...@martin.st>:
> This attribute is available since GCC 4.2.
>
> The previous trick of using inline assembly for overriding the stack
> pointer behind the compiler's back isn't guaranteed to work.
>
> This fixes stack alignment on llvm/clang.
>
> Signed-off-by: Martin Storsjö <mar...@martin.st>
> ---
> mingw-w64-crt/crt/crtexe.c | 16 +++++-----------
> 1 file changed, 5 insertions(+), 11 deletions(-)
>
> diff --git a/mingw-w64-crt/crt/crtexe.c b/mingw-w64-crt/crt/crtexe.c
> index 4542bfe..e390074 100644
> --- a/mingw-w64-crt/crt/crtexe.c
> +++ b/mingw-w64-crt/crt/crtexe.c
> @@ -221,6 +221,11 @@ int mainCRTStartup (void)
> }
>
> static
> +#if defined(__i386__) || defined(_X86_)
> +/* We need to make sure that we align the stack to 16 bytes for the sake of
> SSE
> + opts in main or in functions called main. */
> +__attribute__((force_align_arg_pointer))
> +#endif
> __declspec(noinline) int
> __tmainCRTStartup (void)
> {
> @@ -229,17 +234,6 @@ __tmainCRTStartup (void)
> WINBOOL inDoubleQuote = FALSE;
> memset (&StartupInfo, 0, sizeof (STARTUPINFO));
>
> -#if defined(__i386__) || defined(_X86_)
> - /* We need to make sure that this function is build with frame-pointer
> - and that we align the stack to 16 bytes for the sake of SSE ops in main
> - or in functions inlined into main. */
> - lpszCommandLine = (_TCHAR *) alloca (32);
> - memset (lpszCommandLine, 0xcc, 32);
> -#ifdef __GNUC__
> - asm __volatile__ ("andl $-16, %%esp" : : : "%esp");
> -#endif
> -#endif /* defined(__i386__) || defined(_X86_) */
> -
> if (mingw_app_type)
> GetStartupInfo (&StartupInfo);
> {
> --
> 2.7.4
>
>
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