linux-kernel - [PATCH] riscv: put interrupt entries into .irqentry.text

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>] [day] [month] [year] [list]

Message-Id: <20230821144516.20487-1-namcaov@gmail.com>
Date:   Mon, 21 Aug 2023 16:45:17 +0200
From:   Nam Cao <namcaov@...il.com>
To:     Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Nam Cao <namcaov@...il.com>
Subject: [PATCH] riscv: put interrupt entries into .irqentry.text

The interrupt entries are expected to be in the .irqentry.text section.
For example, for kprobes to work properly, exception code cannot be
probed; this is ensured by blacklisting addresses in the .irqentry.text
section.

Signed-off-by: Nam Cao <namcaov@...il.com>
---
 arch/riscv/kernel/entry.S | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/riscv/kernel/entry.S b/arch/riscv/kernel/entry.S
index 143a2bb3e697..d7dd9030df3f 100644
--- a/arch/riscv/kernel/entry.S
+++ b/arch/riscv/kernel/entry.S
@@ -14,6 +14,8 @@
 #include <asm/asm-offsets.h>
 #include <asm/errata_list.h>
 
+	.section .irqentry.text, "ax"
+
 SYM_CODE_START(handle_exception)
 	/*
 	 * If coming from userspace, preserve the user thread pointer and load
-- 
2.34.1