From: Segher Boessenkool <segher@kernel.crashing.org> To: Michael Ellerman <mpe@ellerman.id.au> Cc: Kees Cook <keescook@chromium.org>, linuxppc-dev <linuxppc-dev@lists.ozlabs.org>, linux-kernel <linux-kernel@vger.kernel.org>, Paul Mackerras <paulus@samba.org>, linux-hardening@vger.kernel.org, Linus Torvalds <torvalds@linux-foundation.org>, Sudip Mukherjee <sudipm.mukherjee@gmail.com> Subject: Re: mainline build failure of powerpc allmodconfig for prom_init_check Date: Mon, 18 Jul 2022 09:56:01 -0500 [thread overview] Message-ID: <20220718145601.GE25951@gate.crashing.org> (raw) In-Reply-To: <87k08bdqm1.fsf@mpe.ellerman.id.au> On Mon, Jul 18, 2022 at 01:52:38PM +1000, Michael Ellerman wrote: > Segher Boessenkool <segher@kernel.crashing.org> writes: > > Can't we simply have a small simple implementation of these functions in > > arch/powerpc/boot/? This stuff is not performance-critical, and this is > > not the first time we hit these problems. > > prom_init.c isn't in arch/powerpc/boot :) Ah duh :-) > It's linked into the kernel proper, but we want it to behave like a > pre-boot environment (because not all boot paths run it) which is why we > restrict what symbols it can call. > > We could have a prom_memset() etc. but we'd need to do some tricks to > rewrite references to memset() to prom_memset() before linking. You can do it in its linker script? Segher
WARNING: multiple messages have this Message-ID (diff)
From: Segher Boessenkool <segher@kernel.crashing.org> To: Michael Ellerman <mpe@ellerman.id.au> Cc: Linus Torvalds <torvalds@linux-foundation.org>, Sudip Mukherjee <sudipm.mukherjee@gmail.com>, Kees Cook <keescook@chromium.org>, linux-kernel <linux-kernel@vger.kernel.org>, Paul Mackerras <paulus@samba.org>, linux-hardening@vger.kernel.org, linuxppc-dev <linuxppc-dev@lists.ozlabs.org> Subject: Re: mainline build failure of powerpc allmodconfig for prom_init_check Date: Mon, 18 Jul 2022 09:56:01 -0500 [thread overview] Message-ID: <20220718145601.GE25951@gate.crashing.org> (raw) In-Reply-To: <87k08bdqm1.fsf@mpe.ellerman.id.au> On Mon, Jul 18, 2022 at 01:52:38PM +1000, Michael Ellerman wrote: > Segher Boessenkool <segher@kernel.crashing.org> writes: > > Can't we simply have a small simple implementation of these functions in > > arch/powerpc/boot/? This stuff is not performance-critical, and this is > > not the first time we hit these problems. > > prom_init.c isn't in arch/powerpc/boot :) Ah duh :-) > It's linked into the kernel proper, but we want it to behave like a > pre-boot environment (because not all boot paths run it) which is why we > restrict what symbols it can call. > > We could have a prom_memset() etc. but we'd need to do some tricks to > rewrite references to memset() to prom_memset() before linking. You can do it in its linker script? Segher
next prev parent reply other threads:[~2022-07-18 15:01 UTC|newest] Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-07-14 8:55 mainline build failure of powerpc allmodconfig for prom_init_check Sudip Mukherjee (Codethink) 2022-07-14 8:55 ` Sudip Mukherjee (Codethink) 2022-07-17 9:12 ` Sudip Mukherjee 2022-07-17 9:12 ` Sudip Mukherjee 2022-07-17 14:44 ` Linus Torvalds 2022-07-17 14:44 ` Linus Torvalds 2022-07-17 19:54 ` Segher Boessenkool 2022-07-17 19:54 ` Segher Boessenkool 2022-07-18 3:52 ` Michael Ellerman 2022-07-18 3:52 ` Michael Ellerman 2022-07-18 14:56 ` Segher Boessenkool [this message] 2022-07-18 14:56 ` Segher Boessenkool 2022-07-17 20:25 ` Sudip Mukherjee 2022-07-17 20:25 ` Sudip Mukherjee 2022-07-17 20:29 ` Linus Torvalds 2022-07-17 20:29 ` Linus Torvalds 2022-07-17 20:38 ` Sudip Mukherjee 2022-07-17 20:38 ` Sudip Mukherjee 2022-07-17 20:56 ` Linus Torvalds 2022-07-17 20:56 ` Linus Torvalds 2022-07-17 20:56 ` Segher Boessenkool 2022-07-17 20:56 ` Segher Boessenkool 2022-07-17 21:11 ` Linus Torvalds 2022-07-17 21:11 ` Linus Torvalds 2022-07-17 21:45 ` Segher Boessenkool 2022-07-17 21:45 ` Segher Boessenkool 2022-07-18 1:38 ` Linus Torvalds 2022-07-18 1:38 ` Linus Torvalds 2022-07-18 4:41 ` Michael Ellerman 2022-07-18 4:41 ` Michael Ellerman 2022-07-18 7:51 ` David Laight 2022-07-18 7:51 ` David Laight 2022-07-18 13:44 ` [PATCH] powerpc/64s: Disable stack variable initialisation for prom_init Michael Ellerman 2022-07-18 13:44 ` Michael Ellerman 2022-07-18 15:03 ` Sudip Mukherjee 2022-07-18 15:03 ` Sudip Mukherjee 2022-07-18 18:34 ` Linus Torvalds 2022-07-18 18:34 ` Linus Torvalds 2022-07-27 12:02 ` Michael Ellerman 2022-07-18 19:06 ` mainline build failure of powerpc allmodconfig for prom_init_check Linus Torvalds 2022-07-18 19:06 ` Linus Torvalds 2022-07-18 22:08 ` Segher Boessenkool 2022-07-18 22:08 ` Segher Boessenkool 2022-07-18 22:55 ` Linus Torvalds 2022-07-18 22:55 ` Linus Torvalds 2022-07-19 13:35 ` Michael Ellerman 2022-07-19 13:35 ` Michael Ellerman
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