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SubjectRe: [PATCH] x86/asm/entry/64: Clean up entry_64.S
On Mon, Jul 6, 2015 at 8:00 AM, Sasha Levin <sasha.levin@oracle.com> wrote:
>
> --- entry.before.o.cmd 2015-07-06 10:48:32.110189938 -0400
> +++ entry.after.o.cmd 2015-07-06 10:48:23.509645442 -0400
> @@ -1,5 +1,5 @@
>
> -entry.before.o: file format elf64-x86-64
> +entry.after.o: file format elf64-x86-64
>
>
> Disassembly of section .entry.text:
> @@ -3961,8 +3961,8 @@
> 3b: 09 02 or %eax,(%rdx)
> ...
> 3d: R_X86_64_64 .entry.text
> - 45: 03 3a add (%rdx),%edi
> - 47: 01 3d 03 d6 00 c8 add %edi,-0x37ff29fd(%rip) # ffffffffc800d650 <ignore_sysret+0xffffffffc800b1f0>
> + 45: 03 33 add (%rbx),%esi
> + 47: 01 3d 03 d5 00 c8 add %edi,-0x37ff2afd(%rip) # ffffffffc800d550 <ignore_sysret+0xffffffffc800b0f0>

What exactly are you doing to generate this diff? This all looks really weird.

> 4d: 44 91 rex.R xchg %eax,%ecx
> 4f: 93 xchg %eax,%ebx
> 50: 2f (bad)

For example: what on earth is the asm above?

--Andy


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