From: Nick Desaulniers <ndesaulniers@google.com>
To: Masahiro Yamada <masahiroy@kernel.org>
Cc: Nathan Chancellor <natechancellor@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
Sedat Dilek <sedat.dilek@gmail.com>,
linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com,
linux-kbuild@vger.kernel.org, linux-arch@vger.kernel.org,
Jakub Jelinek <jakub@redhat.com>,
Fangrui Song <maskray@google.com>,
Caroline Tice <cmtice@google.com>,
Nick Clifton <nickc@redhat.com>, Yonghong Song <yhs@fb.com>,
Jiri Olsa <jolsa@kernel.org>, Andrii Nakryiko <andrii@kernel.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Arvind Sankar <nivedita@alum.mit.edu>,
Chris Murphy <bugzilla@colorremedies.com>,
Mark Wielaard <mark@klomp.org>,
Nick Desaulniers <ndesaulniers@google.com>,
stable@vger.kernel.org, Chris Murphy <lists@colorremedies.com>,
Nathan Chancellor <nathan@kernel.org>
Subject: [PATCH v9 1/3] vmlinux.lds.h: add DWARF v5 sections
Date: Fri, 5 Feb 2021 12:22:18 -0800 [thread overview]
Message-ID: <20210205202220.2748551-2-ndesaulniers@google.com> (raw)
In-Reply-To: <20210205202220.2748551-1-ndesaulniers@google.com>
We expect toolchains to produce these new debug info sections as part of
DWARF v5. Add explicit placements to prevent the linker warnings from
--orphan-section=warn.
Compilers may produce such sections with explicit -gdwarf-5, or based on
the implicit default version of DWARF when -g is used via DEBUG_INFO.
This implicit default changes over time, and has changed to DWARF v5
with GCC 11.
.debug_sup was mentioned in review, but without compilers producing it
today, let's wait to add it until it becomes necessary.
Cc: stable@vger.kernel.org
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1922707
Reported-by: Chris Murphy <lists@colorremedies.com>
Suggested-by: Fangrui Song <maskray@google.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
---
include/asm-generic/vmlinux.lds.h | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 34b7e0d2346c..1e7cde4bd3f9 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -842,8 +842,13 @@
/* DWARF 4 */ \
.debug_types 0 : { *(.debug_types) } \
/* DWARF 5 */ \
+ .debug_addr 0 : { *(.debug_addr) } \
+ .debug_line_str 0 : { *(.debug_line_str) } \
+ .debug_loclists 0 : { *(.debug_loclists) } \
.debug_macro 0 : { *(.debug_macro) } \
- .debug_addr 0 : { *(.debug_addr) }
+ .debug_names 0 : { *(.debug_names) } \
+ .debug_rnglists 0 : { *(.debug_rnglists) } \
+ .debug_str_offsets 0 : { *(.debug_str_offsets) }
/* Stabs debugging sections. */
#define STABS_DEBUG \
--
2.30.0.365.g02bc693789-goog
next prev parent reply other threads:[~2021-02-05 20:26 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-05 20:22 [PATCH v9 0/3] Kbuild: DWARF v5 support Nick Desaulniers
2021-02-05 20:22 ` Nick Desaulniers [this message]
2021-02-06 0:00 ` [PATCH v9 1/3] vmlinux.lds.h: add DWARF v5 sections Andrew Morton
2021-02-06 0:02 ` Nick Desaulniers
2021-02-06 15:02 ` Mark Wielaard
2021-02-05 20:22 ` [PATCH v9 2/3] Kbuild: make DWARF version a choice Nick Desaulniers
2021-02-05 20:22 ` [PATCH v9 3/3] Kconfig: allow explicit opt in to DWARF v5 Nick Desaulniers
2021-02-05 21:00 ` [PATCH v9 0/3] Kbuild: DWARF v5 support Sedat Dilek
2021-02-06 12:04 ` Masahiro Yamada
2021-02-06 12:28 ` Sedat Dilek
2021-02-25 19:13 ` Sedat Dilek
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