From: Alexander Lobakin <alobakin@pm.me>
To: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Arnd Bergmann <arnd@arndb.de>, Kees Cook <keescook@chromium.org>,
Nathan Chancellor <natechancellor@gmail.com>,
Nick Desaulniers <ndesaulniers@google.com>,
Fangrui Song <maskray@google.com>,
Huacai Chen <chenhuacai@kernel.org>,
Pei Huang <huangpei@loongson.cn>,
Jiaxun Yang <jiaxun.yang@flygoat.com>,
Alexander Lobakin <alobakin@pm.me>,
Sami Tolvanen <samitolvanen@google.com>,
Ingo Molnar <mingo@kernel.org>,
Ralf Baechle <ralf@linux-mips.org>,
Corey Minyard <cminyard@mvista.com>,
linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arch@vger.kernel.org, stable@vger.kernel.org,
clang-built-linux@googlegroups.com
Subject: [PATCH v3 mips-next 4/7] MIPS: vmlinux.lds.S: catch bad .rel.dyn at link time
Date: Thu, 07 Jan 2021 11:54:01 +0000 [thread overview]
Message-ID: <20210107115329.281266-4-alobakin@pm.me> (raw)
In-Reply-To: <20210107115329.281266-1-alobakin@pm.me>
Catch any symbols placed in .rel.dyn and check for these sections
to be zero-sized at link time.
Eliminates following ld warning:
mips-alpine-linux-musl-ld: warning: orphan section `.rel.dyn'
from `init/main.o' being placed in section `.rel.dyn'
Adopted from x86/kernel/vmlinux.lds.S.
Suggested-by: Fangrui Song <maskray@google.com>
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
---
arch/mips/kernel/vmlinux.lds.S | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/arch/mips/kernel/vmlinux.lds.S b/arch/mips/kernel/vmlinux.lds.S
index 0f4e46ea4458..0f736d60d43e 100644
--- a/arch/mips/kernel/vmlinux.lds.S
+++ b/arch/mips/kernel/vmlinux.lds.S
@@ -226,4 +226,15 @@ SECTIONS
*(.pdr)
*(.reginfo)
}
+
+ /*
+ * Sections that should stay zero sized, which is safer to
+ * explicitly check instead of blindly discarding.
+ */
+
+ .rel.dyn : {
+ *(.rel.*)
+ *(.rel_*)
+ }
+ ASSERT(SIZEOF(.rel.dyn) == 0, "Unexpected run-time relocations (.rel) detected!")
}
--
2.30.0
next prev parent reply other threads:[~2021-01-07 11:55 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-07 11:51 [PATCH v3 mips-next 0/7] MIPS: vmlinux.lds.S sections fixes & cleanup Alexander Lobakin
2021-01-07 11:53 ` [PATCH v3 mips-next 1/7] MIPS: vmlinux.lds.S: add missing PAGE_ALIGNED_DATA() section Alexander Lobakin
2021-01-07 11:53 ` [PATCH v3 mips-next 2/7] MIPS: vmlinux.lds.S: add ".gnu.attributes" to DISCARDS Alexander Lobakin
2021-01-07 11:53 ` [PATCH v3 mips-next 3/7] MIPS: properly stop .eh_frame generation Alexander Lobakin
2021-01-07 11:54 ` Alexander Lobakin [this message]
2021-01-07 11:54 ` [PATCH v3 mips-next 5/7] MIPS: vmlinux.lds.S: explicitly declare .got table Alexander Lobakin
2021-01-07 11:54 ` [PATCH v3 mips-next 6/7] vmlinux.lds.h: catch compound literals into data and BSS Alexander Lobakin
2021-01-07 11:54 ` [PATCH v3 mips-next 7/7] MIPS: select ARCH_WANT_LD_ORPHAN_WARN Alexander Lobakin
2021-01-07 12:30 ` [PATCH v3 mips-next 0/7] MIPS: vmlinux.lds.S sections fixes & cleanup Alexander Lobakin
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