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From: Andreas Schwab <schwab@linux-m68k.org>
To: Palmer Dabbelt <palmer@dabbelt.com>
Cc: alex@ghiti.fr,  Paul Walmsley <paul.walmsley@sifive.com>,
	aou@eecs.berkeley.edu,  linux-riscv@lists.infradead.org,
	linux-kernel@vger.kernel.org,  kernel-team@android.com,
	 Palmer Dabbelt <palmerdabbelt@google.com>
Subject: Re: [PATCH] RISC-V: Make CONFIG_RELOCATABLE user selectable
Date: Wed, 27 Oct 2021 10:00:31 +0200	[thread overview]
Message-ID: <87mtmuaodc.fsf@igel.home> (raw)
In-Reply-To: <20211026212847.43108-1-palmer@dabbelt.com> (Palmer Dabbelt's message of "Tue, 26 Oct 2021 14:28:47 -0700")

On Okt 26 2021, Palmer Dabbelt wrote:

> +config RELOCATABLE
> +	bool "Build a relocatable kernel"
> +	depends on MMU && 64BIT && !XIP_KERNEL
> +	help
> +          This builds a kernel as a Position Independent Executable (PIE),
> +          which retains all relocation metadata required to relocate the
> +          kernel binary at runtime to a different virtual address than the
> +          address it was linked at.
> +          Since RISCV uses the RELA relocation format, this requires a
> +          relocation pass at runtime even if the kernel is loaded at the
> +          same address it was linked at.

When in doubt, do what?

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510  2552 DF73 E780 A9DA AEC1
"And now for something completely different."

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WARNING: multiple messages have this Message-ID (diff)
From: Andreas Schwab <schwab@linux-m68k.org>
To: Palmer Dabbelt <palmer@dabbelt.com>
Cc: alex@ghiti.fr, Paul Walmsley <paul.walmsley@sifive.com>,
	aou@eecs.berkeley.edu, linux-riscv@lists.infradead.org,
	linux-kernel@vger.kernel.org, kernel-team@android.com,
	Palmer Dabbelt <palmerdabbelt@google.com>
Subject: Re: [PATCH] RISC-V: Make CONFIG_RELOCATABLE user selectable
Date: Wed, 27 Oct 2021 10:00:31 +0200	[thread overview]
Message-ID: <87mtmuaodc.fsf@igel.home> (raw)
In-Reply-To: <20211026212847.43108-1-palmer@dabbelt.com> (Palmer Dabbelt's message of "Tue, 26 Oct 2021 14:28:47 -0700")

On Okt 26 2021, Palmer Dabbelt wrote:

> +config RELOCATABLE
> +	bool "Build a relocatable kernel"
> +	depends on MMU && 64BIT && !XIP_KERNEL
> +	help
> +          This builds a kernel as a Position Independent Executable (PIE),
> +          which retains all relocation metadata required to relocate the
> +          kernel binary at runtime to a different virtual address than the
> +          address it was linked at.
> +          Since RISCV uses the RELA relocation format, this requires a
> +          relocation pass at runtime even if the kernel is loaded at the
> +          same address it was linked at.

When in doubt, do what?

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510  2552 DF73 E780 A9DA AEC1
"And now for something completely different."

  parent reply	other threads:[~2021-10-27  8:00 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-26 21:28 [PATCH] RISC-V: Make CONFIG_RELOCATABLE user selectable Palmer Dabbelt
2021-10-26 21:28 ` Palmer Dabbelt
2021-10-27  5:07 ` Alexandre ghiti
2021-10-27  5:07   ` Alexandre ghiti
2021-10-27  8:00 ` Andreas Schwab [this message]
2021-10-27  8:00   ` Andreas Schwab
2021-10-27  8:58   ` Alexandre Ghiti
2021-10-27  8:58     ` Alexandre Ghiti
2021-10-27  9:45     ` Andreas Schwab
2021-10-27  9:45       ` Andreas Schwab
2021-10-27 23:09       ` Palmer Dabbelt
2021-10-27 23:09         ` Palmer Dabbelt

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