r259621 - in /trunk: libgcc/ChangeLog libgcc/co...

[hjl@gcc.gnu.org]

Author: hjl
Date: Tue Apr 24 22:15:51 2018
New Revision: 259621

URL: https://gcc.gnu.org/viewcvs?rev=259621&root=gcc&view=rev
Log:
x86: Update __CET__ check

__CET__ has been changed by revision 259522:

commit d59cfa9a4064339cf2bd2da828c4c133f13e57f0
Author: hjl <hjl@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Fri Apr 20 13:30:13 2018 +0000

    Define __CET__ for -fcf-protection and remove -mibt

to

    (__CET__ & 1) != 0: -fcf-protection=branch or -fcf-protection=full
    (__CET__ & 2) != 0: -fcf-protection=return or -fcf-protection=full

We should check (__CET__ & 2) != 0 for shadow stack.

libgcc/

	* config/i386/linux-unwind.h: Add (__CET__ & 2) != 0 check
	when including "config/i386/shadow-stack-unwind.h".

libitm/

	* config/x86/sjlj.S (_ITM_beginTransaction): Add
	(__CET__ & 2) != 0 check for shadow stack.
	(GTM_longjmp): Likewise.

Modified:
    trunk/libgcc/ChangeLog
    trunk/libgcc/config/i386/linux-unwind.h
    trunk/libitm/ChangeLog
    trunk/libitm/config/x86/sjlj.S