Messages in this thread | | | Date | Tue, 23 Feb 2016 13:31:31 -0700 | From | David Brown <> | Subject | Re: [kernel-hardening] Re: [PATCH] lkdtm: add test for executing .rodata |
| |
On Mon, Feb 22, 2016 at 12:46:28PM -0800, Kees Cook wrote: >On Thu, Feb 18, 2016 at 1:27 PM, PaX Team <pageexec@freemail.hu> wrote: >> On 18 Feb 2016 at 12:34, Ard Biesheuvel wrote: >> >>> 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 >> >> in that case why not use a top-level asm statement to set the section >> and its attributes (and compile the file with fno-toplevel-reorder)? > >GCC really wants to declare the section. :(
Why not then just use its mechanism to set the section on the code?
static void do_nothing_rodata(void) __attribute__((section(".rodata"))) { return; }
David
| |