r254907 - in /trunk/libitm: ChangeLog config/x8...

Fri Nov 17 22:57:00 GMT 2017

Author: itsimbal
Date: Fri Nov 17 22:57:07 2017
New Revision: 254907

URL: https://gcc.gnu.org/viewcvs?rev=254907&root=gcc&view=rev
Log:
Add extra field to gtm_jmpbuf on x86 only

Expand the gtm_jmpbuf structure by one word field to add
Intel CET support further. The code in sjlj.S already
allocates more space on the stack then gtm_jmpbuf needs.
Use this extra space to absorb the new field.

The structure is allocated on the stack in such a way
that eip/rsp field is overlapped with return address on
the stack. Locate the new field right before eip/rsp so
code that accesses buffer fields relative to address of
gtm_jmpbuf has its offsets unchanged.

	* libitm/config/x86/target.h: Add new field (ssp).
	* libitm/config/x86/sjlj.S: Change offsets.

Modified:
    trunk/libitm/ChangeLog
    trunk/libitm/config/x86/sjlj.S
    trunk/libitm/config/x86/target.h