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Re: [PATCH, DWARF] Add DW_CFA_AARCH64_negate_ra_state to dwarf2.def/h and dwarfnames.c
- From: Jason Merrill <jason at redhat dot com>
- To: Jiong Wang <jiong dot wang at foss dot arm dot com>
- Cc: gcc-patches <gcc-patches at gcc dot gnu dot org>, Cary Coutant <ccoutant at gmail dot com>
- Date: Sat, 9 Sep 2017 17:11:32 +0200
- Subject: Re: [PATCH, DWARF] Add DW_CFA_AARCH64_negate_ra_state to dwarf2.def/h and dwarfnames.c
- Authentication-results: sourceware.org; auth=none
- References: <94486f7a-5966-248d-823b-4f319c87808a@foss.arm.com>
On Thu, Aug 10, 2017 at 6:39 PM, Jiong Wang <jiong.wang@foss.arm.com> wrote:
> Hi,
>
> A new vendor CFA DW_CFA_AARCH64_negate_ra_state was introduced for
> ARMv8.3-A
> return address signing, it is multiplexing DW_CFA_GNU_window_save in CFA
> vendor
> extension space.
>
> This patch adds necessary code to make it available to external, the GDB
> patch (https://sourceware.org/ml/gdb-patches/2017-08/msg00215.html) is
> intended
> to use it.
>
> A new DW_CFA_DUP for it is added in dwarf2.def. The use of DW_CFA_DUP is
> to
> avoid duplicated case value issue when included in libiberty/dwarfnames.
>
> Native x86 builds OK to make sure no macro expanding errors.
>
> OK for trunk?
OK.
Jason