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From: libin <huawei.libin@huawei.com>
To: <will.deacon@arm.com>, <lkp@intel.com>, <catalin.marinas@arm.com>,
	<rostedt@goodmis.org>, <takahiro.akashi@linaro.org>
Cc: <linux-kernel@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>, <guohanjun@huawei.com>,
	<dingtianhong@huawei.com>, <zhouchengming1@huawei.com>,
	<xiexiuqi@huawei.com>
Subject: Re: [PATCH 1/3] recordmcount: fix endianness handling bug for nop_mcount
Date: Fri, 30 Oct 2015 16:45:16 +0800	[thread overview]
Message-ID: <56332E1C.1000206@huawei.com> (raw)
In-Reply-To: <1446193864-24593-2-git-send-email-huawei.libin@huawei.com>



on 2015/10/30 16:31, Li Bin wrote:
> In nop_mcount, shdr->sh_offset and welp->r_offset should handle
> endianness properly, otherwise it will trigger Segmentation fault
> if the recordmcount main and file.o have different endianness.
> 

For more information, please refer to
	https://lkml.org/lkml/2015/10/29/258

> Cc: <stable@vger.kernel.org> # 3.0+
> Signed-off-by: Li Bin <huawei.libin@huawei.com>
> ---
>  scripts/recordmcount.h | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/scripts/recordmcount.h b/scripts/recordmcount.h
> index 49b582a..dda9dba 100644
> --- a/scripts/recordmcount.h
> +++ b/scripts/recordmcount.h
> @@ -376,8 +376,9 @@ static void nop_mcount(Elf_Shdr const *const relhdr,
>  			mcountsym = get_mcountsym(sym0, relp, str0);
>  
>  		if (mcountsym == Elf_r_sym(relp) && !is_fake_mcount(relp)) {
> -			if (make_nop)
> -				ret = make_nop((void *)ehdr, shdr->sh_offset + relp->r_offset);
> +			if (make_nop) {
> +				ret = make_nop((void *)ehdr, _w(shdr->sh_offset) + _w(relp->r_offset));
> +			}
>  			if (warn_on_notrace_sect && !once) {
>  				printf("Section %s has mcount callers being ignored\n",
>  				       txtname);
> 


WARNING: multiple messages have this Message-ID (diff)
From: huawei.libin@huawei.com (libin)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/3] recordmcount: fix endianness handling bug for nop_mcount
Date: Fri, 30 Oct 2015 16:45:16 +0800	[thread overview]
Message-ID: <56332E1C.1000206@huawei.com> (raw)
In-Reply-To: <1446193864-24593-2-git-send-email-huawei.libin@huawei.com>



on 2015/10/30 16:31, Li Bin wrote:
> In nop_mcount, shdr->sh_offset and welp->r_offset should handle
> endianness properly, otherwise it will trigger Segmentation fault
> if the recordmcount main and file.o have different endianness.
> 

For more information, please refer to
	https://lkml.org/lkml/2015/10/29/258

> Cc: <stable@vger.kernel.org> # 3.0+
> Signed-off-by: Li Bin <huawei.libin@huawei.com>
> ---
>  scripts/recordmcount.h | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/scripts/recordmcount.h b/scripts/recordmcount.h
> index 49b582a..dda9dba 100644
> --- a/scripts/recordmcount.h
> +++ b/scripts/recordmcount.h
> @@ -376,8 +376,9 @@ static void nop_mcount(Elf_Shdr const *const relhdr,
>  			mcountsym = get_mcountsym(sym0, relp, str0);
>  
>  		if (mcountsym == Elf_r_sym(relp) && !is_fake_mcount(relp)) {
> -			if (make_nop)
> -				ret = make_nop((void *)ehdr, shdr->sh_offset + relp->r_offset);
> +			if (make_nop) {
> +				ret = make_nop((void *)ehdr, _w(shdr->sh_offset) + _w(relp->r_offset));
> +			}
>  			if (warn_on_notrace_sect && !once) {
>  				printf("Section %s has mcount callers being ignored\n",
>  				       txtname);
> 

  reply	other threads:[~2015-10-30  8:46 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-10-30  8:31 [PATCH 0/3] recordmcount: bugfix and amend Li Bin
2015-10-30  8:31 ` Li Bin
2015-10-30  8:31 ` [PATCH 1/3] recordmcount: fix endianness handling bug for nop_mcount Li Bin
2015-10-30  8:31   ` Li Bin
2015-10-30  8:45   ` libin [this message]
2015-10-30  8:45     ` libin
2015-10-30 14:35   ` Sergei Shtylyov
2015-10-30 14:35     ` Sergei Shtylyov
2015-10-31  2:07     ` libin
2015-10-31  2:07       ` libin
2015-11-02 19:33       ` Steven Rostedt
2015-11-02 19:33         ` Steven Rostedt
2015-11-03  0:58         ` [PATCH] " libin
2015-11-03  0:58           ` libin
2015-10-30  8:31 ` [PATCH 2/3] recordmcount: x86: assign a meaningful value to rel_type_nop Li Bin
2015-10-30  8:31   ` Li Bin
2015-10-30  8:31 ` [PATCH 3/3] recordmcount: arm64: replace the ignored mcount call into nop Li Bin
2015-10-30  8:31   ` Li Bin
2015-10-30  8:44   ` libin
2015-10-30  8:44     ` libin

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