[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [PATCH] livepatch: set -f{function,data}-sections compiler option
- To: Roger Pau Monne <roger.pau@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Wed, 2 Mar 2022 17:13:00 +0100
- Arc-authentication-results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=suse.com; dmarc=pass action=none header.from=suse.com; dkim=pass header.d=suse.com; arc=none
- Arc-message-signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=cqoLkMoWyHeuz/lWQmvZFCNhfMIrDkR3sLW0gFYsbNo=; b=nCxYQMnkKA+yv9jZYmlVjyvd09db2mAQY+g7p5Pjf+gq0MAEEMIHvIkPqfJsT42PfswCFEfO8rHWq/bqqceEcgj/uBdaaD0J5g+oJa5P5Roa3lnGvHAsmJdWUPeqhcEAZ60gqQjnEplwUYlknKP62ozhke5zB87tYWFLa8s3n1HoBlJC4mhvKsWXYIz27olgd0e481gBAzTg4NewocLhjJHBJsaJTvEO8S0KkOnJ1RnD70+nVU5xEPFraIKZ36ani/8BM8/xe9xRQJvvNZio0G8ViWFN6CSOA8nI59Uu4YKDSAEyUH43m+qnS0xHZDNF6JQKF2RLnPsC9o42OROiIw==
- Arc-seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=E2UGXSyUYanDtn+lR8+rfwf0f6d08nvCmC66zvmQvoNkyyombixfmE83I8aWw52AJgaHGNxs4zqmyWQo1zIgHBZNAJwUfrrLZNpO3Gb0SCfWot7kkJgVg6v3sf8ShMGk0F3AhFJR+waFi6ZCZfnxoXH0d2++ulXyaNjzYJJ+NWpCjXmTIItF/JvfvMrVY7x/zShhGYmmwVzX0dLlYrtgTY9/EK9+TqqQzRwdR+IE1T3e9ROWj2SS0iadeKCtsThUaEj0ztfJjyZE+c9/lwKd06XPY38YzQ89uDhoLvv72VHMOY+0DN5a4d1Ta9XeFPVZdKt6eXYzsSe55ps1vJmGog==
- Authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=suse.com;
- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Wed, 02 Mar 2022 16:13:08 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 02.03.2022 15:41, Jan Beulich wrote:
> On 02.03.2022 14:44, Roger Pau Monne wrote:
>> --- a/xen/arch/x86/xen.lds.S
>> +++ b/xen/arch/x86/xen.lds.S
>> @@ -88,6 +88,9 @@ SECTIONS
>>
>> *(.text.cold)
>> *(.text.unlikely)
>> +#ifdef CONFIG_LIVEPATCH
>> + *(.text.*)
>> +#endif
>
> This coming after the "cold" and "unlikely" special sections and
> ahead of .fixup isn't very nice. Also from looking at the linker
> scripts ld supplies I'm getting the impression that there could/
> would then also be e.g. .text.cold.* and .text.unlikely.* which
> you'd want to separate.
Thinking about it, with -ffunction-sections startup code cannot
reasonably be placed in .text.startup, or else there would be
confusion with code originating from a function named startup().
But of course .text.startup.* is similarly difficult to arrange
for not ending up in the output's main .text, so adding
.text.startup.* and .text.exit.* later in the script wouldn't
gain us anything.
Jan
|
