From: Alexander Lobakin <alobakin@pm.me>
To: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Arnd Bergmann <arnd@arndb.de>,
Nathan Chancellor <natechancellor@gmail.com>,
Nick Desaulniers <ndesaulniers@google.com>,
Huacai Chen <chenhuacai@kernel.org>,
Pei Huang <huangpei@loongson.cn>,
Kees Cook <keescook@chromium.org>,
Alexander Lobakin <alobakin@pm.me>,
Fangrui Song <maskray@google.com>,
Jiaxun Yang <jiaxun.yang@flygoat.com>,
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 v5 mips-next 8/9] vmlinux.lds.h: catch UBSAN's "unnamed data" into data
Date: Sun, 10 Jan 2021 11:56:54 +0000 [thread overview]
Message-ID: <20210110115546.30970-8-alobakin@pm.me> (raw)
In-Reply-To: <20210110115546.30970-1-alobakin@pm.me>
When building kernel with both LD_DEAD_CODE_DATA_ELIMINATION and
UBSAN, LLVM stack generates lots of "unnamed data" sections:
ld.lld: warning: net/built-in.a(netfilter/utils.o): (.data.$__unnamed_2)
is being placed in '.data.$__unnamed_2'
ld.lld: warning: net/built-in.a(netfilter/utils.o): (.data.$__unnamed_3)
is being placed in '.data.$__unnamed_3'
ld.lld: warning: net/built-in.a(netfilter/utils.o): (.data.$__unnamed_4)
is being placed in '.data.$__unnamed_4'
ld.lld: warning: net/built-in.a(netfilter/utils.o): (.data.$__unnamed_5)
is being placed in '.data.$__unnamed_5'
[...]
Also handle this by adding the related sections to generic definitions.
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
---
include/asm-generic/vmlinux.lds.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 5f2f5b1db84f..cc659e77fcb0 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -95,7 +95,7 @@
*/
#ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
#define TEXT_MAIN .text .text.[0-9a-zA-Z_]*
-#define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..L* .data..compoundliteral*
+#define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..L* .data..compoundliteral* .data.$__unnamed_*
#define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]*
#define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]* .rodata..L*
#define BSS_MAIN .bss .bss.[0-9a-zA-Z_]* .bss..compoundliteral*
--
2.30.0
next prev parent reply other threads:[~2021-01-10 11:57 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-10 11:53 [PATCH v5 mips-next 0/9] MIPS: vmlinux.lds.S sections fixes & cleanup Alexander Lobakin
2021-01-10 11:56 ` [PATCH v5 mips-next 1/9] MIPS: vmlinux.lds.S: add missing PAGE_ALIGNED_DATA() section Alexander Lobakin
2021-01-10 11:56 ` [PATCH v5 mips-next 2/9] MIPS: CPS: don't create redundant .text.cps-vec section Alexander Lobakin
2021-01-10 11:56 ` [PATCH v5 mips-next 3/9] MIPS: vmlinux.lds.S: add ".gnu.attributes" to DISCARDS Alexander Lobakin
2021-01-10 11:56 ` [PATCH v5 mips-next 4/9] MIPS: properly stop .eh_frame generation Alexander Lobakin
2021-01-10 11:56 ` [PATCH v5 mips-next 5/9] MIPS: vmlinux.lds.S: explicitly catch .rel.dyn symbols Alexander Lobakin
2021-01-11 1:28 ` Nathan Chancellor
2021-01-10 11:56 ` [PATCH v5 mips-next 6/9] MIPS: vmlinux.lds.S: explicitly declare .got table Alexander Lobakin
2021-01-10 11:56 ` [PATCH v5 mips-next 7/9] vmlinux.lds.h: catch compound literals into data and BSS Alexander Lobakin
2021-01-10 11:56 ` Alexander Lobakin [this message]
2021-01-11 2:05 ` [PATCH v5 mips-next 8/9] vmlinux.lds.h: catch UBSAN's "unnamed data" into data Nathan Chancellor
2021-01-10 11:57 ` [PATCH v5 mips-next 9/9] MIPS: select ARCH_WANT_LD_ORPHAN_WARN Alexander Lobakin
2021-01-11 19:53 ` [PATCH v5 mips-next 0/9] MIPS: vmlinux.lds.S sections fixes & cleanup Kees Cook
2021-01-11 20:57 ` Alexander Lobakin
2021-01-11 22:43 ` Thomas Bogendoerfer
2021-01-15 11:15 ` Arnd Bergmann
2021-01-15 14:40 ` Thomas Bogendoerfer
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210110115546.30970-8-alobakin@pm.me \
--to=alobakin@pm.me \
--cc=arnd@arndb.de \
--cc=chenhuacai@kernel.org \
--cc=clang-built-linux@googlegroups.com \
--cc=cminyard@mvista.com \
--cc=huangpei@loongson.cn \
--cc=jiaxun.yang@flygoat.com \
--cc=keescook@chromium.org \
--cc=linux-arch@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mips@vger.kernel.org \
--cc=maskray@google.com \
--cc=natechancellor@gmail.com \
--cc=ndesaulniers@google.com \
--cc=ralf@linux-mips.org \
--cc=stable@vger.kernel.org \
--cc=tsbogend@alpha.franken.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).