On 19 May 2013 05:17, dw <limegreenso...@yahoo.com> wrote:
> There is a bug in __stosb (as well as the other __stos* functions), as
> illustrated by this code (compile with -Os for 64bit):
>
> #include <stdio.h>
> #include <windows.h>
>
> #ifndef _AMD64_
> #error Must be compiled for 64 bit
> #endif
>
> int main(int argc, char* argv[])
> {
> struct
> {
> int a;
> int b;
> } c;
>
> c.a = 1;
> c.b = 2;
>
> __stosb((PBYTE)&c, 0, sizeof(c));
> printf("%u %u\n", c.a, c.b); // Should print 0 0
> }
>
> The attached patch resolves this issue.
What bug is it? It is not obvious from just the diff.
--
VZ
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