[linux-yocto] [linux-yocto/linux-yocto-dev 4.18][PATCH] perf arm64: Fix generate system call table failed with /tmp mounted with noexec

[Hongxu Jia]

On 2018年10月18日 21:20, Bruce Ashfield wrote:
> I tried to apply this to 4.18, but the commit which creates
> the issue is only in 4.19+
>
> commit 2b5882435606c209ebc052230f03505ea477a252
> Author: Kim Phillips <kim.phillips at arm.com>
> Date:   Fri Jul 6 16:34:43 2018 -0500
>
>     perf arm64: Generate system call table from asm/unistd.h
>
>
> % git tag --contains 2b5882435606c209ebc052230f03505ea477a252
> v4.19-rc1
> v4.19-rc2
> v4.19-rc3
> v4.19-rc4
> v4.19-rc5
> v4.19-rc6
> v4.19-rc7
> v4.19-rc8
>
> So I'll merge this to linux-yocto-dev, but the other linux-yocto
> variants should be unaffected.
>

Got it, thanks for the affected check, and I've submitted the fix to 
upstream
mailing list linux-perf-users at vger.kernel.org

//Hongxu

> Bruce
>
> On 10/18/18 5:12 AM, Hongxu Jia wrote:
>> Which /tmp mounted with noexec, generate system call table failed.
>> [snip]
>> |perf-1.0/tools/perf/arch/arm64/entry/syscalls//mksyscalltbl:
>> /tmp/create-table-6VGPSt: Permission denied
>> [snip]
>>
>> Add variable TMPDIR as prefix dir of the temporary file, if it is set,
>> replace default /tmp
>>
>> Fixes: 2b5882435606 ("perf arm64: Generate system call table from 
>> asm/unistd.h")
>>
>> Signed-off-by: Hongxu Jia <hongxu.jia at windriver.com>
>> ---
>>   tools/perf/arch/arm64/entry/syscalls/mksyscalltbl | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/tools/perf/arch/arm64/entry/syscalls/mksyscalltbl 
>> b/tools/perf/arch/arm64/entry/syscalls/mksyscalltbl
>> index 2dbb8cad..c88fd32 100755
>> --- a/tools/perf/arch/arm64/entry/syscalls/mksyscalltbl
>> +++ b/tools/perf/arch/arm64/entry/syscalls/mksyscalltbl
>> @@ -23,7 +23,7 @@ create_table_from_c()
>>   {
>>       local sc nr last_sc
>>   -    create_table_exe=`mktemp /tmp/create-table-XXXXXX`
>> +    create_table_exe=`mktemp ${TMPDIR:-/tmp}/create-table-XXXXXX`
>>         {
>>
>
>