code review 6326054: cmd/ld: add PT_PAX_FLAGS ELF header

cmd/ld: add PT_PAX_FLAGS ELF header

PAX systems are Linux systems that are more paranoid about memory permissions.
These flags tell them to relax when running Go binaries.

Fixes issue 47.

[rsc, 2012-08-03 18:02:27]

Hello iant (cc: golang-dev@googlegroups.com),

I'd like you to review this change to
https://go.googlecode.com/hg/

[iant, 2012-08-03 18:31:38]

LGTM

http://codereview.appspot.com/6326054/diff/7001/src/cmd/8l/asm.c
File src/cmd/8l/asm.c (right):

http://codereview.appspot.com/6326054/diff/7001/src/cmd/8l/asm.c#newcode1133
src/cmd/8l/asm.c:1133: ph->align = 8;
s/8/4/

[rsc, 2012-08-03 19:27:38]

*** Submitted as http://code.google.com/p/go/source/detail?r=5099eaeb3086 ***

cmd/ld: add PT_PAX_FLAGS ELF header

PAX systems are Linux systems that are more paranoid about memory permissions.
These flags tell them to relax when running Go binaries.

Fixes issue 47.

R=iant
CC=golang-dev
http://codereview.appspot.com/6326054

[minux1, 2012-08-06 01:53:25]

i think we also need to add PT_PAX_FLAGS generation to 5l,
because Linux/ARM system also has limited PAX support,
we could do this now to prevent future frustrations.

[rsc, 2012-08-06 19:45:56]

On Sun, Aug 5, 2012 at 9:53 PM,  <minux.ma@gmail.com> wrote:
> i think we also need to add PT_PAX_FLAGS generation to 5l,
> because Linux/ARM system also has limited PAX support,
> we could do this now to prevent future frustrations.

sounds good to me. want to do it?

[minux1, 2012-08-07 16:01:40]

On Tue, Aug 7, 2012 at 3:45 AM, Russ Cox <rsc@golang.org> wrote:

> On Sun, Aug 5, 2012 at 9:53 PM,  <minux.ma@gmail.com> wrote:
> > i think we also need to add PT_PAX_FLAGS generation to 5l,
> > because Linux/ARM system also has limited PAX support,
> > we could do this now to prevent future frustrations.
> sounds good to me. want to do it?
>
http://codereview.appspot.com/6453092/