From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 7837E1ADC82; Tue, 14 Jan 2025 12:23:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736857401; cv=none; b=ts+dAG3sO9ts+Coi611xyeUylTq5NFCmotgNJxThxhDcFgYTkVtGpi2TYyOsQt4FgNIS8nNJUeFfUvLCRqJN3DhesX26l0+5XKZztc0hKdF/NecdsjhBKlpTIHZ80b96bNhjmMqnSsu7g6qVdeYoLfC4SMb6R7jdmQKXi7yT6NM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736857401; c=relaxed/simple; bh=lktSMYug0GNq0xAZecTUM8sGInEZd8/T6qmdAqCh5hw=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=fBFDGnr9dRD8VWVPU6ZIF0FbI7JgdqDbX4orC9ZpN9RejTCDXA+Uw2Jl5bSUweINv8e0QwI+XIsKx5PdF6rJbsbg3NwG2kMzGCcsBPZmRFruISKPv+Yyg9yfDDdu+aE20STd0S5R11FefvKTekJmwiEVavV7lIDlFe/3w5pMeys= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 04C731CC4; Tue, 14 Jan 2025 04:23:47 -0800 (PST) Received: from e133380.arm.com (e133380.arm.com [10.1.197.43]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 1183E3F66E; Tue, 14 Jan 2025 04:23:15 -0800 (PST) Date: Tue, 14 Jan 2025 12:23:13 +0000 From: Dave Martin To: Akihiko Odaki Cc: Eric Biederman , Kees Cook , Catalin Marinas , Mark Brown , Baoquan He , Vivek Goyal , Dave Young , LEROY Christophe , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, kexec@lists.infradead.org, binutils@sourceware.org, devel@daynix.com Subject: Re: [PATCH v4 4/6] crash: Use note name macros Message-ID: References: <20250111-elf-v4-0-b3841fa0dcd9@daynix.com> <20250111-elf-v4-4-b3841fa0dcd9@daynix.com> Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250111-elf-v4-4-b3841fa0dcd9@daynix.com> On Sat, Jan 11, 2025 at 02:48:47PM +0900, Akihiko Odaki wrote: > Use note name macros to match with the userspace's expectation. > > Signed-off-by: Akihiko Odaki > Acked-by: Baoquan He Reviewed-by: Dave Martin > --- > fs/proc/kcore.c | 12 ++++++------ > include/linux/vmcore_info.h | 2 +- > kernel/crash_core.c | 2 +- > 3 files changed, 8 insertions(+), 8 deletions(-) > > diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c > index e376f48c4b8b..e5612313b8b4 100644 > --- a/fs/proc/kcore.c > +++ b/fs/proc/kcore.c > @@ -34,8 +34,6 @@ > #include > #include "internal.h" > > -#define CORE_STR "CORE" > - > #ifndef ELF_CORE_EFLAGS > #define ELF_CORE_EFLAGS 0 > #endif > @@ -119,7 +117,9 @@ static size_t get_kcore_size(int *nphdr, size_t *phdrs_len, size_t *notes_len, > > *phdrs_len = *nphdr * sizeof(struct elf_phdr); > *notes_len = (4 * sizeof(struct elf_note) + > - 3 * ALIGN(sizeof(CORE_STR), 4) + > + ALIGN(sizeof(NN_PRSTATUS), 4) + > + ALIGN(sizeof(NN_PRPSINFO), 4) + > + ALIGN(sizeof(NN_TASKSTRUCT), 4) + > VMCOREINFO_NOTE_NAME_BYTES + > ALIGN(sizeof(struct elf_prstatus), 4) + > ALIGN(sizeof(struct elf_prpsinfo), 4) + > @@ -444,11 +444,11 @@ static ssize_t read_kcore_iter(struct kiocb *iocb, struct iov_iter *iter) > goto out; > } > > - append_kcore_note(notes, &i, CORE_STR, NT_PRSTATUS, &prstatus, > + append_kcore_note(notes, &i, NN_PRSTATUS, NT_PRSTATUS, &prstatus, > sizeof(prstatus)); > - append_kcore_note(notes, &i, CORE_STR, NT_PRPSINFO, &prpsinfo, > + append_kcore_note(notes, &i, NN_PRPSINFO, NT_PRPSINFO, &prpsinfo, > sizeof(prpsinfo)); > - append_kcore_note(notes, &i, CORE_STR, NT_TASKSTRUCT, current, > + append_kcore_note(notes, &i, NN_TASKSTRUCT, NT_TASKSTRUCT, current, > arch_task_struct_size); > /* > * vmcoreinfo_size is mostly constant after init time, but it > diff --git a/include/linux/vmcore_info.h b/include/linux/vmcore_info.h > index e1dec1a6a749..1672801fd98c 100644 > --- a/include/linux/vmcore_info.h > +++ b/include/linux/vmcore_info.h > @@ -8,7 +8,7 @@ > > #define CRASH_CORE_NOTE_NAME "CORE" > #define CRASH_CORE_NOTE_HEAD_BYTES ALIGN(sizeof(struct elf_note), 4) > -#define CRASH_CORE_NOTE_NAME_BYTES ALIGN(sizeof(CRASH_CORE_NOTE_NAME), 4) > +#define CRASH_CORE_NOTE_NAME_BYTES ALIGN(sizeof(NN_PRSTATUS), 4) > #define CRASH_CORE_NOTE_DESC_BYTES ALIGN(sizeof(struct elf_prstatus), 4) > > /* > diff --git a/kernel/crash_core.c b/kernel/crash_core.c > index 078fe5bc5a74..335b8425dd4b 100644 > --- a/kernel/crash_core.c > +++ b/kernel/crash_core.c > @@ -436,7 +436,7 @@ void crash_save_cpu(struct pt_regs *regs, int cpu) > memset(&prstatus, 0, sizeof(prstatus)); > prstatus.common.pr_pid = current->pid; > elf_core_copy_regs(&prstatus.pr_reg, regs); > - buf = append_elf_note(buf, KEXEC_CORE_NOTE_NAME, NT_PRSTATUS, > + buf = append_elf_note(buf, NN_PRSTATUS, NT_PRSTATUS, > &prstatus, sizeof(prstatus)); > final_note(buf); > } > > -- > 2.47.1 > >