[PATCH 1/2] powerpc: initial stack protector (-fstack-protector) support · Christophe Leroy <hidden> · 2018-09-17
[PATCH 2/2] powerpc/32: stack protector: change the canary value per task · Christophe Leroy <hidden> · 2018-09-17
Re: [PATCH 2/2] powerpc/32: stack protector: change the canary value per task · Segher Boessenkool <hidden> · 2018-09-17
Re: [PATCH 1/2] powerpc: initial stack protector (-fstack-protector) support · kbuild test robot <hidden> · 2018-09-17
Re: [PATCH 1/2] powerpc: initial stack protector (-fstack-protector) support · Segher Boessenkool <hidden> · 2018-09-17

Re: [PATCH 2/2] powerpc/32: stack protector: change the canary value per task

From: Segher Boessenkool <hidden>
Date: 2018-09-17 16:50:02
Also in: lkml

On Mon, Sep 17, 2018 at 12:15:08PM +0000, Christophe Leroy wrote:

 I would have liked to use -mstack-protector-guard=tls -mstack-protector-guard-reg=r2
 -mstack-protector-guard-offset=offsetof(struct task_struct, stack_canary) but I have
 not found how set the value of offsetof(struct task_struct, stack_canary) in Makefile.

By far the easiest is to have the canary at a fixed offset from r2.


Segher

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