From: Thiago Jung Bauermann <thiago.bauermann@linaro.org>
To: Srinath Parvathaneni <Srinath.Parvathaneni@arm.com>
Cc: Luis <luis.machado.foss@gmail.com>,
GDB Patches <gdb-patches@sourceware.org>,
"guinevere@redhat.com" <guinevere@redhat.com>,
Ezra Sitorus <Ezra.Sitorus@arm.com>,
Matthieu Longo <Matthieu.Longo@arm.com>,
"simark@simark.ca" <simark@simark.ca>,
Peter Maydell <peter.maydell@linaro.org>
Subject: Re: [PATCH v3 1/5] [PATCH 1/5] gdb/aarch64: Add POR_EL0 register support for FEAT_S1POE
Date: Tue, 11 Aug 2026 23:23:59 +0000 [thread overview]
Message-ID: <878q6c8cmo.fsf@linaro.org> (raw)
In-Reply-To: <AS8PR08MB10099C30174429EDE2AC594659BD12@AS8PR08MB10099.eurprd08.prod.outlook.com> (Srinath Parvathaneni's message of "Fri, 7 Aug 2026 19:51:55 +0000")
Hello,
Srinath Parvathaneni <Srinath.Parvathaneni@arm.com> writes:
> Hi Luis/Thiago,
>
> After looking at the suggestions in the thread, I made a few changes to the
> POR_EL0 interface. The custom display for por_el0 has been updated, and I've
> also added support for pseudo registers for the individual permission fields.
>
> Could you please have a look at the output below? If this looks ok, I'll re-spin
> the series, address the remaining review comments and send it out for another
> review.
I like this output. I'd like to see what Luis thinks but IMHO it's a
nice improvement over the previous versions, and is a usable way of
working with the POR and its individual permissions.
> Also added a new group (por) for por_el0 register along with poe pseduo registers.
Good idea.
> Set 1:
> (gdb) info register por_el0
> por_el0 0x0000000000000077 [ P1=rwx P0=rwx ]
> (gdb) info register por
> por_el0 0x0000000000000077 [ P1=rwx P0=rwx ]
> por_el0_p0 0x7 rwx
> por_el0_p1 0x7 rwx
> por_el0_p2 0x0 ---
> por_el0_p3 0x0 ---
> por_el0_p4 0x0 ---
> por_el0_p5 0x0 ---
> por_el0_p6 0x0 ---
> por_el0_p7 0x0 ---
> por_el0_p8 0x0 ---
> por_el0_p9 0x0 ---
> por_el0_p10 0x0 ---
> por_el0_p11 0x0 ---
> por_el0_p12 0x0 ---
> por_el0_p13 0x0 ---
> por_el0_p14 0x0 ---
> por_el0_p15 0x0 ---
>
> Set 2:
> (gdb) set $por_el0=0xf7f7f7f7f7f7f7f7
> (gdb) info register por_el0
> por_el0 0xf7f7f7f7f7f7f7f7 [ P15=??? P14=rwx P13=??? P12=rwx
> P11=??? P10=rwx P9=??? P8=rwx
> P7=??? P6=rwx P5=??? P4=rwx
> P3=??? P2=rwx P1=??? P0=rwx ]
> (gdb) info register por
> por_el0 0xf7f7f7f7f7f7f7f7 [ P15=??? P14=rwx P13=??? P12=rwx
> P11=??? P10=rwx P9=??? P8=rwx
> P7=??? P6=rwx P5=??? P4=rwx
> P3=??? P2=rwx P1=??? P0=rwx ]
> por_el0_p0 0x7 rwx
> por_el0_p1 0xf ???
> por_el0_p2 0x7 rwx
> por_el0_p3 0xf ???
> por_el0_p4 0x7 rwx
> por_el0_p5 0xf ???
> por_el0_p6 0x7 rwx
> por_el0_p7 0xf ???
> por_el0_p8 0x7 rwx
> por_el0_p9 0xf ???
> por_el0_p10 0x7 rwx
> por_el0_p11 0xf ???
> por_el0_p12 0x7 rwx
> por_el0_p13 0xf ???
> por_el0_p14 0x7 rwx
> por_el0_p15 0xf ???
>
> Set 3:
> (gdb) set $por_el0=0x0123456789abcdef
> (gdb) info register por_el0
> por_el0 0x0123456789abcdef [ P14=r-- P13=--x P12=r-x P11=-w-
> P10=rw- P9=-wx P8=rwx P7=???
> P6=??? P5=??? P4=??? P3=???
> P2=??? P1=??? P0=??? ]
> (gdb) info register por
> por_el0 0x0123456789abcdef [ P14=r-- P13=--x P12=r-x P11=-w-
> P10=rw- P9=-wx P8=rwx P7=???
> P6=??? P5=??? P4=??? P3=???
> P2=??? P1=??? P0=??? ]
> por_el0_p0 0xf ???
> por_el0_p1 0xe ???
> por_el0_p2 0xd ???
> por_el0_p3 0xc ???
> por_el0_p4 0xb ???
> por_el0_p5 0xa ???
> por_el0_p6 0x9 ???
> por_el0_p7 0x8 ???
> por_el0_p8 0x7 rwx
> por_el0_p9 0x6 -wx
> por_el0_p10 0x5 rw-
> por_el0_p11 0x4 -w-
> por_el0_p12 0x3 r-x
> por_el0_p13 0x2 --x
> por_el0_p14 0x1 r--
> por_el0_p15 0x0 ---
> (gdb)
>
> Set 4:
> (gdb) set $por_el0=0x7
> (gdb) info register por
> por_el0 0x0000000000000007 [ P0=rwx ]
> por_el0_p0 0x7 rwx
> por_el0_p1 0x0 ---
> por_el0_p2 0x0 ---
> por_el0_p3 0x0 ---
> por_el0_p4 0x0 ---
> por_el0_p5 0x0 ---
> por_el0_p6 0x0 ---
> por_el0_p7 0x0 ---
> por_el0_p8 0x0 ---
> por_el0_p9 0x0 ---
> por_el0_p10 0x0 ---
> por_el0_p11 0x0 ---
> por_el0_p12 0x0 ---
> por_el0_p13 0x0 ---
> por_el0_p14 0x0 ---
> por_el0_p15 0x0 ---
> (gdb) set $por_el0_p1=0x7
> (gdb) set $por_el0_p3=0x5
> (gdb) set $por_el0_p4=0x3
> (gdb) set $por_el0_p5=0x1
> (gdb) set $por_el0_p6=0xf
> (gdb) info register por
> por_el0 0x000000000f135077 [ P6=??? P5=r-- P4=r-x P3=rw-
> P1=rwx P0=rwx ]
> por_el0_p0 0x7 rwx
> por_el0_p1 0x7 rwx
> por_el0_p2 0x0 ---
> por_el0_p3 0x5 rw-
> por_el0_p4 0x3 r-x
> por_el0_p5 0x1 r--
> por_el0_p6 0xf ???
> por_el0_p7 0x0 ---
> por_el0_p8 0x0 ---
> por_el0_p9 0x0 ---
> por_el0_p10 0x0 ---
> por_el0_p11 0x0 ---
> por_el0_p12 0x0 ---
> por_el0_p13 0x0 ---
> por_el0_p14 0x0 ---
> por_el0_p15 0x0 ---
> (gdb)
>
> Please let me know your comments, thanks.
>
> Regards,
> Sri.
--
Thiago
(he/him)
next prev parent reply other threads:[~2026-08-11 23:24 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-14 20:15 [PATCH v3 0/5] " srinath.parvathaneni
2026-07-14 20:15 ` [PATCH v3 1/5] [PATCH 1/5] " srinath.parvathaneni
2026-07-21 19:53 ` Luis
2026-07-25 6:20 ` Thiago Jung Bauermann
2026-07-25 7:37 ` Luis
2026-07-25 18:44 ` Thiago Jung Bauermann
2026-08-07 19:51 ` Srinath Parvathaneni
2026-08-11 23:23 ` Thiago Jung Bauermann [this message]
2026-08-12 21:33 ` Luis
2026-08-12 21:32 ` Luis
2026-07-21 20:25 ` Luis
2026-07-23 9:29 ` Srinath Parvathaneni
2026-07-25 6:13 ` Thiago Jung Bauermann
2026-07-25 7:29 ` Luis
2026-07-14 20:15 ` [PATCH v3 2/5] [PATCH 2/5] gdb: Improve SIGSEGV diagnostics for POE faults srinath.parvathaneni
2026-07-21 20:30 ` Luis
2026-07-22 9:41 ` Matthieu Longo
2026-07-22 23:11 ` Luis
2026-07-23 9:03 ` Srinath Parvathaneni
2026-07-25 7:39 ` Luis
2026-07-14 20:15 ` [PATCH v3 3/5] [PATCH 3/5] gdbserver/aarch64: Add POR_EL0 register support srinath.parvathaneni
2026-07-14 20:15 ` [PATCH v3 4/5] [PATCH 4/5] gdb/aarch64: Add core file support for FEAT_S1POE srinath.parvathaneni
2026-07-21 20:14 ` Luis
2026-07-14 20:15 ` [PATCH v3 5/5] [PATCH 5/5] gdb/testsuite: Add FEAT_S1POE testcases srinath.parvathaneni
2026-07-21 20:38 ` Luis
2026-07-25 6:23 ` Thiago Jung Bauermann
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