Re: [PATCH v4 0/3] Compile-time stack frame pointer validation

[Borislav Petkov]

On Thu, May 21, 2015 at 03:54:25PM -0500, Josh Poimboeuf wrote:
> stackvalidate: arch/x86/lib/memmove_64.o: return instruction outside of a function at .altinstr_replacement+0x5

That must be something like this:

0000000000000000 <.altinstr_replacement>:
   0:   48 89 d1                mov    %rdx,%rcx
   3:   f3 a4                   rep movsb %ds:(%rsi),%es:(%rdi)
   5:   c3                      retq

right?

In any case, anything with alternatives is probably a false positive
because even if instructions appear outside of the containing function,
they get patched in and are actually inside. Jump offsets get fixed up
properly too. Should, at least :-)

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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