| Message ID | 20200428221419.2530697-6-natechancellor@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Allow ld.lld to link the MIPS VDSO | expand |
diff --git a/arch/mips/vdso/Kconfig b/arch/mips/vdso/Kconfig index 36a52158d849b..7aec721398d59 100644 --- a/arch/mips/vdso/Kconfig +++ b/arch/mips/vdso/Kconfig @@ -12,7 +12,7 @@ # the lack of relocations. As such, we disable the VDSO for microMIPS builds. config MIPS_LD_CAN_LINK_VDSO - def_bool LD_VERSION >= 225000000 + def_bool LD_VERSION >= 225000000 || LD_IS_LLD config MIPS_DISABLE_VDSO def_bool CPU_MICROMIPS || (!CPU_MIPSR6 && !MIPS_LD_CAN_LINK_VDSO)
Currently, when linking with ld.lld, this warning pops up: arch/mips/vdso/Makefile:70: MIPS VDSO requires binutils >= 2.25 CONFIG_LD_VERSION is set with scripts/ld-version.sh, which is specific to GNU ld. It returns 0 for ld.lld so CONFIG_MIPS_LD_CAN_LINK_VDSO does not set. ld.lld has a completely different versioning scheme (as it follows LLVM's versioning) and it does not have the issue mentioned in the comment block so it should be allowed to link the VDSO. With this patch, the VDSO successfully links and shows P_MIPS_PC32 in vgettimeofday.o. $ llvm-objdump -Dr arch/mips/vdso/vgettimeofday.o | grep R_MIPS_PC32 00000024: R_MIPS_PC32 _start 000000b0: R_MIPS_PC32 _start 000002bc: R_MIPS_PC32 _start 0000036c: R_MIPS_PC32 _start 00000468: R_MIPS_PC32 _start Reported-by: Dmitry Golovin <dima@golovin.in> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> Link: https://github.com/ClangBuiltLinux/linux/issues/785 Link: https://github.com/llvm/llvm-project/commit/e364e2e9ce50c12eb2bf093560e1a1a8544d455a --- v3 -> v4: * No changes. v2 -> v3: * No changes. v1 -> v2: * Move into Kconfig so that the warning does not happen. arch/mips/vdso/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)