Messages in this thread | | | Date | Wed, 22 Dec 2004 19:23:13 +0100 | From | Andi Kleen <> | Subject | Re: [PATCH] [CAN-2004-1144] Fix int 0x80 hole in 2.4 x86-64 linux kernels |
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On Wed, Dec 22, 2004 at 07:20:48PM +0100, Willy Tarreau wrote: > Hi Andi, > > On Wed, Dec 22, 2004 at 06:58:18PM +0100, Andi Kleen wrote: > (...) > > sti > > + movl %eax,%eax > > pushq %rax > > Although I don't know about x86_64 assembly, I know x86 and I wonder > how this patch would do anything. I would personnaly have written something > more like :
An 32bit write in long mode clears the upper 32bits of the register. See the x86-64 architecture manuals for more details.
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