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author | Fangrui Song <maskray@google.com> | 2023-04-11 20:09:44 +0000 |
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committer | Masahiro Yamada <masahiroy@kernel.org> | 2023-04-17 11:23:06 +0900 |
commit | ccb2d173b983984bfa35398abed3f8a76c75f788 (patch) | |
tree | 81cb7cdefa0e41e667167b11f290eefb80aaf114 /Makefile | |
parent | ddc72c9659b5a85a2d135503caf193da0723e813 (diff) | |
download | linux-stable-ccb2d173b983984bfa35398abed3f8a76c75f788.tar.gz linux-stable-ccb2d173b983984bfa35398abed3f8a76c75f788.tar.bz2 linux-stable-ccb2d173b983984bfa35398abed3f8a76c75f788.zip |
Makefile: use -z pack-relative-relocs
Commit 27f2a4db76e8 ("Makefile: fix GDB warning with CONFIG_RELR")
added --use-android-relr-tags to fix a GDB warning
BFD: /android0/linux-next/vmlinux: unknown type [0x13] section `.relr.dyn'
The GDB warning has been fixed in version 11.2.
The DT_ANDROID_RELR tag was deprecated since DT_RELR was standardized.
Thus, --use-android-relr-tags should be removed. While making the
change, try -z pack-relative-relocs, which is supported since LLD 15.
Keep supporting --pack-dyn-relocs=relr as well for older LLD versions.
There is no indication of obsolescence for --pack-dyn-relocs=relr.
As of today, GNU ld supports the latter option for x86 and powerpc64
ports and has no intention to support --pack-dyn-relocs=relr. In the
absence of the glibc symbol version GLIBC_ABI_DT_RELR,
--pack-dyn-relocs=relr and -z pack-relative-relocs are identical in
ld.lld.
GNU ld and newer versions of LLD report warnings (instead of errors) for
unknown -z options. Only errors lead to non-zero exit codes. Therefore,
we should test --pack-dyn-relocs=relr before testing
-z pack-relative-relocs.
Link: https://github.com/ClangBuiltLinux/linux/issues/1057
Link: https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=a619b58721f0a03fd91c27670d3e4c2fb0d88f1e
Signed-off-by: Fangrui Song <maskray@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Diffstat (limited to 'Makefile')
-rw-r--r-- | Makefile | 3 |
1 files changed, 2 insertions, 1 deletions
@@ -1113,7 +1113,8 @@ LDFLAGS_vmlinux += -X endif ifeq ($(CONFIG_RELR),y) -LDFLAGS_vmlinux += --pack-dyn-relocs=relr --use-android-relr-tags +# ld.lld before 15 did not support -z pack-relative-relocs. +LDFLAGS_vmlinux += $(call ld-option,--pack-dyn-relocs=relr,-z pack-relative-relocs) endif # We never want expected sections to be placed heuristically by the |