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Groups > linux.kernel > #1337322
| From | Ard Biesheuvel <ard.biesheuvel@linaro.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH] lkdtm: add test for executing .rodata |
| Date | 2016-02-18 13:50 +0100 |
| Message-ID | <r3wbT-5xP-5@gated-at.bofh.it> (permalink) |
| References | <r2VFo-57D-3@gated-at.bofh.it> <r3ua7-49t-37@gated-at.bofh.it> <r3v69-4Nn-5@gated-at.bofh.it> <r3vzc-5gf-15@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 18 February 2016 at 13:07, Arnd Bergmann <arnd@arndb.de> wrote: > On Thursday 18 February 2016 12:34:50 Ard Biesheuvel wrote: >> >> We have __section() as an alias for __attribute__((__section__())), so >> we could use that instead. >> >> However, that does not fix the issue Kees is trying to solve, where a >> .rodata section is emitted with the "x" bit set, which causes the >> linker to complain: >> >> /tmp/cc50ffWw.s: Assembler messages: >> /tmp/cc50ffWw.s:2: Warning: setting incorrect section attributes for >> .rodata.text >> >> I wonder if we could get away with doing something like >> >> AFLAGS_lkdtm.o += -Wa,-W >> >> here? This just hides the warnings, but may result in the .rodata >> section in the vmlinux file to have X permissions as well. I don't >> think anyone uses an ELF loader to load their kernel, but who knows >> ... > > Don't we also get a warning when we link objects with conflicting > section attributes? > I didn't see one > Maybe a solution would be to define a separate section for this one > function, and then use a linker script to move it into .rodata? > Or maybe "objcopy --set-section-flags --rename-section"? > I think objcopy is the easiest.
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[PATCH] lkdtm: add test for executing .rodata Kees Cook <keescook@chromium.org> - 2016-02-16 22:50 +0100
Re: [PATCH] lkdtm: add test for executing .rodata Laura Abbott <labbott@redhat.com> - 2016-02-17 02:10 +0100
Re: [PATCH] lkdtm: add test for executing .rodata Kees Cook <keescook@chromium.org> - 2016-02-17 21:30 +0100
Re: [PATCH] lkdtm: add test for executing .rodata Kees Cook <keescook@chromium.org> - 2016-02-17 22:10 +0100
Re: [PATCH] lkdtm: add test for executing .rodata "PaX Team" <pageexec@freemail.hu> - 2016-02-18 11:40 +0100
Re: [PATCH] lkdtm: add test for executing .rodata Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2016-02-18 12:40 +0100
Re: [PATCH] lkdtm: add test for executing .rodata Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2016-02-18 13:00 +0100
Re: [PATCH] lkdtm: add test for executing .rodata Arnd Bergmann <arnd@arndb.de> - 2016-02-18 13:10 +0100
Re: [PATCH] lkdtm: add test for executing .rodata Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2016-02-18 13:50 +0100
Re: [PATCH] lkdtm: add test for executing .rodata Kees Cook <keescook@chromium.org> - 2016-02-18 21:10 +0100
Re: [PATCH] lkdtm: add test for executing .rodata "PaX Team" <pageexec@freemail.hu> - 2016-02-18 22:30 +0100
Re: [PATCH] lkdtm: add test for executing .rodata Kees Cook <keescook@chromium.org> - 2016-02-22 21:50 +0100
Re: [PATCH] lkdtm: add test for executing .rodata Arnd Bergmann <arnd@arndb.de> - 2016-02-17 22:50 +0100
Re: [PATCH] lkdtm: add test for executing .rodata Arnd Bergmann <arnd@arndb.de> - 2016-02-17 22:50 +0100
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