linux-kernel - RE: [PATCH 0/4] Section alignment issues?

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Fri, 22 Dec 2023 09:48:50 +0000
From: David Laight <David.Laight@...LAB.COM>
To: 'Masahiro Yamada' <masahiroy@...nel.org>, "deller@...nel.org"
	<deller@...nel.org>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "Arnd
 Bergmann" <arnd@...db.de>, "linux-modules@...r.kernel.org"
	<linux-modules@...r.kernel.org>, "linux-arch@...r.kernel.org"
	<linux-arch@...r.kernel.org>, Luis Chamberlain <mcgrof@...nel.org>
Subject: RE: [PATCH 0/4] Section alignment issues?

...
> diff --git a/include/linux/init.h b/include/linux/init.h
> index 3fa3f6241350..650311e4b215 100644
> --- a/include/linux/init.h
> +++ b/include/linux/init.h
> @@ -264,6 +264,7 @@ extern struct module __this_module;
>  #define ____define_initcall(fn, __stub, __name, __sec)         \
>         __define_initcall_stub(__stub, fn)                      \
>         asm(".section   \"" __sec "\", \"a\"            \n"     \
> +           ".balign 4                                  \n"     \
>             __stringify(__name) ":                      \n"     \
>             ".long      " __stringify(__stub) " - .     \n"     \
>             ".previous                                  \n");   \
> 
> 
> 
> Then, "this section requires at least 4 byte alignment"
> is recorded in the sh_addralign field.

Perhaps one of the headers should contain (something like):
#ifdef CONFIG_64
#define BALIGN_PTR ".balign 8\n"
#else
#define BALIGN_PTR ".balign 4\n"
#endif

to make it all easier (although that example doesn't need it).

	David

-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)