[0/2] Enable Dead Code Elimination

Message ID	tencent_A49D2F3ABD9848D0904EE4A6A0BDAC933A06@qq.com
Headers	show Return-Path: <opensbi-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org> Message-ID: <tencent_A49D2F3ABD9848D0904EE4A6A0BDAC933A06@qq.com> From: Kele Zhang <1952088712@qq.com> To: opensbi@lists.infradead.org Cc: tanyuan@tinylab.org, falcon@tinylab.org, Kele Zhang <1952088712@qq.com> Subject: [PATCH 0/2] Enable Dead Code Elimination Date: Sat, 24 Aug 2024 16:14:07 +0800 MIME-Version: 1.0 preview: This patch enables `--gc-sections`. Dead Code Elimination (DCE) can reduce binary size and the attack surface without introducing side effects, and it has been used in the Linux kernel for many years. Content analysis details: (1.1 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider [1952088712(at)qq.com] 0.2 FREEMAIL_ENVFROM_END_DIGIT Envelope-from freemail username ends in digit [1952088712(at)qq.com] 0.0 RCVD_IN_VALIDITY_SAFE_BLOCKED RBL: ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. [203.205.221.221 listed in sa-accredit.habeas.com] 0.0 RCVD_IN_VALIDITY_CERTIFIED_BLOCKED RBL: ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. [203.205.221.221 listed in sa-trusted.bondedsender.org] 1.0 RDNS_DYNAMIC Delivered to internal network by host with dynamic-looking rDNS -0.0 T_SCC_BODY_TEXT_LINE No description available. 2.0 HELO_DYNAMIC_IPADDR Relay HELO'd using suspicious hostname (IP addr 1) -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [203.205.221.221 listed in list.dnswl.org] 0.0 RCVD_IN_VALIDITY_RPBL_BLOCKED RBL: ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. [203.205.221.221 listed in bl.score.senderscore.com] Precedence: list Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "opensbi" <opensbi-bounces@lists.infradead.org> Errors-To: opensbi-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org
Series	Enable Dead Code Elimination \| expand [0/2] Enable Dead Code Elimination [1/2] Makefile: enable --gc-sections [2/2] Makefile: Remove -g from default CFLAGS

Message ID

tencent_A49D2F3ABD9848D0904EE4A6A0BDAC933A06@qq.com

Headers

Message-ID: <tencent_A49D2F3ABD9848D0904EE4A6A0BDAC933A06@qq.com>
From: Kele Zhang <1952088712@qq.com>
To: opensbi@lists.infradead.org
Cc: tanyuan@tinylab.org,
	falcon@tinylab.org,
	Kele Zhang <1952088712@qq.com>
Subject: [PATCH 0/2] Enable Dead Code Elimination
Date: Sat, 24 Aug 2024 16:14:07 +0800
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Precedence: list
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Sender: "opensbi" <opensbi-bounces@lists.infradead.org>
Errors-To: opensbi-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org

Series

Enable Dead Code Elimination | expand

Message

Kele Zhang Aug. 24, 2024, 8:14 a.m. UTC

This patch enables `--gc-sections`. Dead Code Elimination (DCE) can
reduce binary size and the attack surface without introducing side
effects, and it has been used in the Linux kernel for many years.

After testing, enabling DCE does not affect the normal functionality of
OpenSBI.

Kele Zhang (2):
  Makefile: enable --gc-sections
  Makefile: Remove -g from default CFLAGS

 Makefile                    | 4 ++--
 firmware/fw_base.ldS        | 1 +
 firmware/fw_payload.elf.ldS | 2 +-
 3 files changed, 4 insertions(+), 3 deletions(-)