On Mon, Jan 11, 2021 at 11:44 PM Thomas Bogendoerfer
[off-list ref] wrote:

On Mon, Jan 11, 2021 at 08:57:25PM +0000, Alexander Lobakin wrote:

quoted

From: Kees Cook <redacted>
Date: Mon, 11 Jan 2021 11:53:39 -0800

quoted

On Sun, Jan 10, 2021 at 11:53:50AM +0000, Alexander Lobakin wrote:

quoted

This series hunts the problems discovered after manual enabling of
ARCH_WANT_LD_ORPHAN_WARN. Notably:
 - adds the missing PAGE_ALIGNED_DATA() section affecting VDSO
   placement (marked for stable);
 - stops blind catching of orphan text sections with .text.*
   directive;
 - properly stops .eh_frame section generation.

Compile and runtime tested on MIPS32R2 CPS board with no issues
using two different toolkits:
 - Binutils 2.35.1, GCC 10.2.1 (with Alpine patches);
 - LLVM stack: 11.0.0 and from latest Git snapshot.

Since v4 [3]:
 - new: drop redundant .text.cps-vec creation and blind inclusion
   of orphan text sections via .text.* directive in vmlinux.lds.S;
 - don't assert SIZEOF(.rel.dyn) as it's reported that it may be not
   empty on certain machines and compilers (Thomas);
 - align GOT table like it's done for ARM64;
 - new: catch UBSAN's "unnamed data" sections in generic definitions
   when building with LD_DEAD_CODE_DATA_ELIMINATION;
 - collect Reviewed-bys (Kees, Nathan).

Looks good; which tree will this land through?

linux-mips/mips-next I guess, since 7 of 9 patches are related only
to this architecture.
This might need Arnd's Acked-bys or Reviewed-by for the two that
refer include/asm-generic, let's see what Thomas think.

Looks good from my side and I have it already sitting in branch for
submission.

Arnd, are you ok with the changes in include/asm-generic ?

Yes, I'm never quite sure about what to make of linker script changes,
but I trust Kees on the review. For merging it through your tree:

Acked-by: Arnd Bergmann <arnd@arndb.de>