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Re: [PATCH 7/7] x86/kexec: Zero general purpose registers
- To: Kevin Lampis <kevin.lampis@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 11 Jun 2026 16:28:04 +0200
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- Cc: andrew.cooper3@xxxxxxxxxx, roger.pau@xxxxxxxxxx, Kevin Lampis <klampis@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Thu, 11 Jun 2026 14:28:14 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 09.06.2026 17:45, Kevin Lampis wrote:
> --- a/xen/arch/x86/x86_64/kexec_reloc.S
> +++ b/xen/arch/x86/x86_64/kexec_reloc.S
> @@ -78,6 +78,20 @@ FUNC(kexec_reloc, PAGE_SIZE)
> testq $KEXEC_RELOC_FLAG_COMPAT, %r8
> jnz .L_call_32_bit
>
> + xor %edi, %edi
> + xor %eax, %eax
> + xor %ebx, %ebx
> + xor %ecx, %ecx
> + xor %edx, %edx
> + xor %r8d, %r8d
> + xor %r9d, %r9d
Why the double blanks after the comma here? While that aligns with what
follows, it misaligns with what comes earlier.
> + xor %r10d, %r10d
> + xor %r11d, %r11d
> + xor %r12d, %r12d
> + xor %r13d, %r13d
> + xor %r14d, %r14d
> + xor %r15d, %r15d
> +
> /* Jump to the image entry point */
> jmp *%rbp
Please take surrounding code as reference as to style, i.e. particularly
the number of blanks to insert after the insn mnemonic.
Jan
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