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| author | Fangrui Song <maskray@google.com> | 2021-08-13 13:05:11 -0700 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-08-15 13:49:39 +1000 |
| commit | 0355785313e2191be4e1108cdbda94ddb0238c48 (patch) | |
| tree | fbba519417d5dda1c14fa34bc252d092634c4011 | |
| parent | 1e688dd2a3d6759d416616ff07afc4bb836c4213 (diff) | |
| download | linux-0355785313e2191be4e1108cdbda94ddb0238c48.tar.gz linux-0355785313e2191be4e1108cdbda94ddb0238c48.tar.bz2 linux-0355785313e2191be4e1108cdbda94ddb0238c48.zip | |
powerpc: Add "-z notext" flag to disable diagnostic
Object files used to link .tmp_vmlinux.kallsyms1 have many
R_PPC64_ADDR64 relocations in non-SHF_WRITE sections. There are many
text relocations (e.g. in .rela___ksymtab_gpl+* and .rela__mcount_loc
sections) in a -pie link and are disallowed by LLD:
ld.lld: error: can't create dynamic relocation R_PPC64_ADDR64 against local symbol in readonly segment; recompile object files with -fPIC or pass '-Wl,-z,notext' to allow text relocations in the output
>>> defined in arch/powerpc/kernel/head_64.o
>>> referenced by arch/powerpc/kernel/head_64.o:(__restart_table+0x10)
Newer GNU ld configured with "--enable-textrel-check=error" will report
an error as well:
$ ld-new -EL -m elf64lppc -pie ... -o .tmp_vmlinux.kallsyms1 ...
ld-new: read-only segment has dynamic relocations
Add "-z notext" to suppress the errors. Non-CONFIG_RELOCATABLE builds
use the default -no-pie mode and thus R_PPC64_ADDR64 relocations can be
resolved at link-time.
Reported-by: Itaru Kitayama <itaru.kitayama@riken.jp>
Co-developed-by: Bill Wendling <morbo@google.com>
Signed-off-by: Fangrui Song <maskray@google.com>
Signed-off-by: Bill Wendling <morbo@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210813200511.1905703-1-morbo@google.com
| -rw-r--r-- | arch/powerpc/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile index 9aaf1abbc641..aa6808e70647 100644 --- a/arch/powerpc/Makefile +++ b/arch/powerpc/Makefile @@ -122,6 +122,7 @@ endif LDFLAGS_vmlinux-y := -Bstatic LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie +LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) += -z notext LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) ifdef CONFIG_PPC64 |