From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
To: Yury Norov <ynorov@caviumnetworks.com>
Cc: libc-alpha@sourceware.org
Subject: Re: [PATCH 4/4] Consolidate Linux truncate implementations
Date: Thu, 22 Sep 2016 19:05:00 -0000 [thread overview]
Message-ID: <6e461b86-63e1-0980-0b26-608cea3575a0@linaro.org> (raw)
In-Reply-To: <20160922155131.GA20294@yury-N73SV>
On 22/09/2016 12:51, Yury Norov wrote:
> On Thu, Sep 22, 2016 at 11:42:11AM -0300, Adhemerval Zanella wrote:
>>
>>
>> On 22/09/2016 11:24, Yury Norov wrote:
>>>> +/* Truncate PATH to LENGTH bytes. */
>>>> int
>>>> -truncate64 (const char *path, off64_t length)
>>>> +__truncate64 (const char *path, off64_t length)
>>>> {
>>>> - unsigned int low = length & 0xffffffff;
>>>> - unsigned int high = length >> 32;
>>>> - int result = INLINE_SYSCALL (truncate64, 3, path,
>>>> - __LONG_LONG_PAIR (high, low));
>>>> - return result;
>>>> + return INLINE_SYSCALL_CALL (truncate64, path,
>>>> + __ALIGNMENT_ARG SYSCALL_LL64 (length));
>>>> }
>>>> +weak_alias (__truncate64, truncate64)
>>>> +
>>>> +#ifdef __OFF_T_MATCHES_OFF64_T
>>>> +weak_alias (__truncate64, truncate);
>>>> +#endif
>>>
>>> It seems you forgot weak_alias (__truncate64, __truncate);
>>>
>>
>> I do not think it requires to add __truncate alias since glibc currently
>> does have internal calls to truncate.
>
> Sorry, I was meaning __ftruncate:
> /home/yury/work/toolchain/build-glibc-aarch64-thunderx-linux-gnu-mabi-ilp32/libc_pic.os:
> In function `internal_fallocate':
> /home/yury/work/toolchain/gits/glibc/io/../sysdeps/posix/posix_fallocate.c:64:
> undefined reference to `__ftruncate'
>
> Truncate looks correct.
> The fix is like this to me:
>
> --
> diff --git a/sysdeps/unix/sysv/linux/ftruncate64.c b/sysdeps/unix/sysv/linux/ftruncate64.c
> index 914ce67..4a00db5 100644
> --- a/sysdeps/unix/sysv/linux/ftruncate64.c
> +++ b/sysdeps/unix/sysv/linux/ftruncate64.c
> @@ -33,5 +33,6 @@ __ftruncate64 (int fd, off64_t length)
> weak_alias (__ftruncate64, ftruncate64)
>
> #ifdef __OFF_T_MATCHES_OFF64_T
> +weak_alias (__ftruncate64, __ftruncate)
> weak_alias (__ftruncate64, ftruncate);
> #endif
>
Ah right, the fallback posix_fallocate implementation. I will add this to
the patch, thanks.
next prev parent reply other threads:[~2016-09-22 19:05 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-20 15:02 [PATCH 0/4] Linux lseek and {f}truncate syscall consolidation Adhemerval Zanella
2016-09-20 15:02 ` [PATCH 4/4] Consolidate Linux truncate implementations Adhemerval Zanella
2016-09-22 14:25 ` Yury Norov
2016-09-22 14:42 ` Adhemerval Zanella
2016-09-22 15:52 ` Yury Norov
2016-09-22 19:05 ` Adhemerval Zanella [this message]
2016-10-25 17:55 ` Adhemerval Zanella
2016-11-09 13:44 ` Adhemerval Zanella
2016-09-20 15:02 ` [PATCH 1/4] Add INTERNAL_SYSCALL_CALL Adhemerval Zanella
2016-09-20 21:36 ` Florian Weimer
2016-09-21 18:00 ` Adhemerval Zanella
2016-09-21 19:22 ` Florian Weimer
2016-09-22 13:43 ` Adhemerval Zanella
2016-09-22 20:34 ` Florian Weimer
2016-09-23 14:16 ` Adhemerval Zanella
2016-09-23 20:39 ` Florian Weimer
2016-09-20 15:02 ` [PATCH v3 2/4] Consolidate lseek/lseek64/llseek implementations Adhemerval Zanella
2016-10-11 14:40 ` Adhemerval Zanella
2016-10-25 17:54 ` Adhemerval Zanella
2016-11-04 16:23 ` Adhemerval Zanella
2016-11-08 19:02 ` Steve Ellcey
2016-09-20 15:02 ` [PATCH 3/4] Consolidate Linux ftruncate implementations Adhemerval Zanella
2016-10-11 14:41 ` Adhemerval Zanella
2016-10-25 17:54 ` Adhemerval Zanella
2016-11-09 13:44 ` Adhemerval Zanella
2016-11-09 15:33 ` Andreas Schwab
2016-11-09 17:24 ` Adhemerval Zanella
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