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Re: [PATCH 0/3 v3] [AArch64] Support tagged pointer
- From: Pedro Alves <palves at redhat dot com>
- To: Yao Qi <qiyaoltc at gmail dot com>, gdb-patches at sourceware dot org
- Date: Fri, 8 Dec 2017 12:24:41 +0000
- Subject: Re: [PATCH 0/3 v3] [AArch64] Support tagged pointer
- Authentication-results: sourceware.org; auth=none
- References: <firstname.lastname@example.org>
On 12/08/2017 10:04 AM, Yao Qi wrote:
> ARMv8 supports tagged address, that is, the top one byte in address
> is ignored. It is always enabled on aarch64-linux. See
> Some parts of GDB related to address are updated in this patch series,
> - Memory access, like command 'x',
> - Setting hw breakpoint on some address,
> - Setting watchpoint on some address,
> Address tag is treated as non-significant bits of address, so this patch
> series add a new gdbarch significant_addr_bit, and use it in gdbarch to
> get rid of non-significant bits. This was the suggestion in the v2 review.
Thanks much for the update. I like this version a lot better.
> When I test this patch series, and I find a regression in linespec. I
> posted the fix https://sourceware.org/ml/gdb-patches/2017-12/msg00158.html
> Without this fix, this series causes a regression.
Thanks again for that fix.