Hi Szabolcs,
> -Original Message-
> From: Szabolcs Nagy
> Sent: 23 July 2020 17:24
> To: gcc-patches@gcc.gnu.org
> Cc: Kyrylo Tkachov
> Subject: [PATCH 2/2] aarch64: add PAC-RET protection to libitm sjlj.S
>
> _ITM_beginTransaction is a 'returns_twice'
_ITM_beginTransaction is a 'returns_twice' function that saves x30
on the stack as part of gtm_jmpbuf (that is passed down to
GTM_begin_transaction), but the saved x30 is also used for return.
The return path should be protected so we don't leave an
ldp x29, x30, [sp]
ret
gadget in the code, s
