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From: Arvind Sankar <nivedita@alum.mit.edu>
To: Arvind Sankar <nivedita@alum.mit.edu>
Cc: Borislav Petkov <bp@alien8.de>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
	x86@kernel.org, linux-kernel@vger.kernel.org,
	Kees Cook <keescook@chromium.org>,
	Thomas Lendacky <Thomas.Lendacky@amd.com>
Subject: Re: [PATCH] x86/tools/relocs: Add _etext and __end_of_kernel_reserve to S_REL
Date: Sat, 11 Jan 2020 12:32:14 -0500	[thread overview]
Message-ID: <20200111173214.GB2688392@rani.riverdale.lan> (raw)
In-Reply-To: <20200111172047.GA2688392@rani.riverdale.lan>

On Sat, Jan 11, 2020 at 12:20:48PM -0500, Arvind Sankar wrote:
> I'm running gentoo, but building the kernel using binutils-2.21.1
> compiled from the GNU source tarball, and gcc-4.6.4 again compiled from
> source. (It's not something I normally need but I was investigating
> something else to see what exactly happens with older toolchains.)
> 
> I used the below to compile the kernel (I added in
> readelf/objdump/objcopy just now, and it does build until the relocs
> error). The config is x86-64 defconfig with CONFIG_RETPOLINE overridden
> to n (since gcc 4.6.4 doesn't support retpoline).
> 
> make O=~/kernel64 -j LD=~/old/bin/ld AS=~/old/bin/as READELF=~/old/bin/readelf \
> 	OBJDUMP=~/old/bin/objdump OBJCOPY=~/old/bin/objcopy GCC=~/old/bin/gcc
							    ^^ that should be CC
> 

The built kernel (with this patch) does boot till userspace on qemu, so
these old versions aren't producing a completely broken kernel.

  reply	other threads:[~2020-01-11 17:32 UTC|newest]

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-10 20:23 [PATCH] x86/tools/relocs: Add _etext and __end_of_kernel_reserve to S_REL Arvind Sankar
2020-01-10 20:38 ` Borislav Petkov
2020-01-10 20:50   ` Arvind Sankar
2020-01-10 21:50     ` [PATCH v2] " Arvind Sankar
2020-01-10 21:52       ` Arvind Sankar
2020-01-11 13:02     ` [PATCH] " Borislav Petkov
2020-01-11 17:20       ` Arvind Sankar
2020-01-11 17:32         ` Arvind Sankar [this message]
2020-01-13 13:43         ` Borislav Petkov
2020-01-13 16:13           ` Arvind Sankar
2020-01-13 16:38             ` Borislav Petkov
2020-01-13 17:59               ` Arvind Sankar
2020-01-13 18:08                 ` Borislav Petkov
2020-01-14  4:17                   ` Arvind Sankar
2020-01-14 11:25                     ` Borislav Petkov
2020-01-14 16:32                       ` Arvind Sankar
2020-01-14  4:08               ` Arvind Sankar
2020-01-13 19:53             ` [PATCH v3] x86/vmlinux: Fix vmlinux.lds.S with pre-2.23 binutils Arvind Sankar
2020-01-13 21:46               ` Tom Lendacky
2020-01-13 23:06                 ` Arvind Sankar
2020-01-14  1:53               ` Kees Cook
2020-01-14  1:57                 ` H. Peter Anvin
2020-01-14  2:20                   ` Kees Cook
2020-01-14  3:58                   ` Arvind Sankar
2020-01-14  5:05                     ` hpa
2020-01-14 16:51                 ` Borislav Petkov
2020-01-14 21:50                   ` hpa
2020-01-15  0:21                   ` Arvind Sankar
2020-01-15 12:24                     ` Borislav Petkov
2020-03-16 16:02                       ` [PATCH] Documentation/changes: Raise minimum supported binutils version to 2.23 Borislav Petkov
2020-03-16 20:54                         ` Kees Cook
2020-03-23 20:44                         ` Jason A. Donenfeld
2020-03-23 20:51                           ` Kees Cook
2020-03-23 21:11                             ` Jason A. Donenfeld
2020-03-25 17:33                               ` David Laight
2020-03-24  9:02                             ` Masahiro Yamada
2020-03-24  9:12                               ` Masahiro Yamada
2020-03-24 15:38                                 ` Arvind Sankar
2020-03-24 17:31                                   ` Masahiro Yamada
2020-03-24 21:36                                     ` Arvind Sankar
2020-03-24  9:14                               ` Borislav Petkov
2020-03-24  9:40                                 ` Masahiro Yamada
2020-03-24 12:00                                   ` Borislav Petkov
2020-03-24 16:22                                 ` Jason A. Donenfeld
2020-03-24 16:28                                   ` Borislav Petkov
2020-03-24 16:37                                     ` Linus Torvalds
2020-03-24 16:48                                       ` Borislav Petkov
2020-03-24 21:42                                         ` Arvind Sankar
2020-03-24 22:01                                           ` Arvind Sankar
2020-03-24 22:14                                           ` Linus Torvalds
2020-03-24 23:49                                             ` Arvind Sankar
2020-03-24 17:53                                       ` Kees Cook
2020-03-23 20:50                         ` [PATCH] Documentation/changes: Raise minimum supported binutilsa " Nick Desaulniers
2020-01-13 23:38       ` [PATCH] x86/tools/relocs: Add _etext and __end_of_kernel_reserve to S_REL Arvind Sankar
2020-01-10 20:56   ` Kees Cook
     [not found]     ` <CAEQFVGa4fksPRtiLtBckSgbJY_JSHr07hoy5+5w-pAYym16YVg@mail.gmail.com>
2020-01-11 19:40       ` Fwd: " Mauro Rossi

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