[Bug other/51467] Stack Smashing Protector: Canary is destroyed in RAX partially only on x86_64

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51467

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |jakub at gcc dot gnu.org
         Resolution|                            |INVALID

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-12-08 
15:21:16 UTC ---
Please read the AMD64 architecture manuals.
xorl %eax, %eax is just a shorter alternative to xorq %rax, %rax, both clear
all 64 bits of that register.