From: John Baldwin <jhb@FreeBSD.org>
To: Palmer Dabbelt <palmer@dabbelt.com>,
Andrew Burgess <aburgess@redhat.com>
Cc: gdb-patches@sourceware.org, binutils@sourceware.org,
greentime.hu@sifive.com, greg.savin@sifive.com
Subject: Re: [PATCH v2 2/2] Propagate NT_RISCV_VECTOR from Linux kernel headers to binutils. The value is identical to pre-existing NT_RISCV_CSR but the note names different (NT_RISCV_CSR is "GDB" and NT_RISCV_VECTOR is "CORE")
Date: Fri, 11 Aug 2023 17:47:29 -0700 [thread overview]
Message-ID: <3c7ed690-2ab5-a71f-6302-8ba94ba39525@FreeBSD.org> (raw)
In-Reply-To: <mhng-dc867b93-c0ab-4e7d-9971-5a7d39960f1c@palmer-ri-x1c9>
On 8/11/23 9:43 AM, Palmer Dabbelt wrote:
> On Fri, 11 Aug 2023 05:51:45 PDT (-0700), Andrew Burgess wrote:
>> Greg Savin via Gdb-patches <gdb-patches@sourceware.org> writes:
>>
>>> ---
>>> include/elf/common.h | 2 ++
>>> 1 file changed, 2 insertions(+)
>>>
>>> diff --git a/include/elf/common.h b/include/elf/common.h
>>> index e7eede23a07..d28f5c6ccf5 100644
>>> --- a/include/elf/common.h
>>> +++ b/include/elf/common.h
>>> @@ -715,6 +715,8 @@
>>> /* note name must be "CORE". */
>>> #define NT_RISCV_CSR 0x900 /* RISC-V Control and Status Registers */
>>> /* note name must be "GDB". */
>>> +#define NT_RISCV_VECTOR 0x900 /* RISC-V Vector Registers */
>>> + /* note name must be "CORE". */
>>
>> I'm not a binutils maintainer, but do have an interest from the
>> RISC-V/GDB side.
>>
>> Given the comments you made in an earlier mail, I guess we're going to
>> have to restructure some of the core file support in order to handle
>> NT_RISCV_CSR and NT_RISCV_VECTOR having the same values. But that
>> should be doable.
>>
>> No objections to this patch from me.
>
> NT_RISCV_VECTOR isn't in a releasted kernel, so it's not a stable uABI
> yet. So there's still time to change it. 0I've got a revert on the
> kernel lists, it'd mean we miss 6.5 but we'd just end up in 6.6 which
> isn't so bad.
While it is possible to handle colliding NT_RISCV_* values, it will probably
be simpler all-around if you are able to make NT_RISCV_VECTOR be 0x901 since
you are going to revert and redo.
--
John Baldwin
next prev parent reply other threads:[~2023-08-12 0:47 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-09 17:53 [PATCH] Re-map value of NT_RISCV_CSR to not collide with the value of NT_RISCV_VECTOR in Linux kernel header file 'include/uapi/linux/elf.h' Greg Savin
2023-08-10 18:39 ` John Baldwin
2023-08-10 18:56 ` Greg Savin
2023-08-10 20:00 ` John Baldwin
2023-08-10 22:11 ` Greg Savin
2023-08-10 22:11 ` [PATCH v2 1/2] Reset note name of NT_RISCV_CSR to "GDB" to be consistent with the intent described in commit db6092f3aec43ea4d10efc5ff74274f04cdc0ad6 Greg Savin
2023-08-11 12:23 ` Andrew Burgess
2023-08-10 22:11 ` [PATCH v2 2/2] Propagate NT_RISCV_VECTOR from Linux kernel headers to binutils. The value is identical to pre-existing NT_RISCV_CSR but the note names different (NT_RISCV_CSR is "GDB" and NT_RISCV_VECTOR is "CORE") Greg Savin
2023-08-11 12:51 ` Andrew Burgess
2023-08-11 16:43 ` Palmer Dabbelt
2023-08-12 0:47 ` John Baldwin [this message]
2023-08-12 0:50 ` Palmer Dabbelt
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