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Re: RFC: x86: Enable -z separate-code by default
On Mon, Feb 19, 2018 at 5:37 AM, Florian Weimer <email@example.com> wrote:
> On 02/19/2018 02:15 PM, H.J. Lu wrote:
>> This patch enables -z separate-code by default for x86. To reduce
>> x86-64 binary size, set ELF_MAXPAGESIZE to 4KB.
> What is the reason for doing that?
This avoids loading code pages which also contains data.
This improves cache performance as well as security.
> Wouldn't it need GCC changes as well to be truly effective?
No. Linker can control the segment layout without GCC help.