Re: [PATCH] x86: Get the previous shadow stack pointer from the restore token

On Sat, Dec 16, 2023 at 8:41 AM Richard Biener wrote: > > > > > Am 16.12.2023 um 16:56 schrieb H.J. Lu : > > > > Linux CET kernel places a restore token on shadow stack followed by > > optional additional information for signal handler to enhance security. > > The restore token is the previous sh

Re: [PATCH] x86: Get the previous shadow stack pointer from the restore token

> Am 16.12.2023 um 16:56 schrieb H.J. Lu : > > Linux CET kernel places a restore token on shadow stack followed by > optional additional information for signal handler to enhance security. > The restore token is the previous shadow stack pointer with bit 63 set. > It is usually transparent to

[PATCH] x86: Get the previous shadow stack pointer from the restore token

Linux CET kernel places a restore token on shadow stack followed by optional additional information for signal handler to enhance security. The restore token is the previous shadow stack pointer with bit 63 set. It is usually transparent to user programs since kernel will pop the restore token and