From: Alexey Tourbin <at@altlinux.ru>
To: ALT Devel discussion list <devel@lists.altlinux.org>
Subject: Re: [devel] Q: debuginfo strip controls & deps
Date: Sat, 5 Feb 2011 17:52:40 +0300
Message-ID: <20110205145240.GC11374@altlinux.org> (raw)
In-Reply-To: <20110205140056.GC7246@altlinux.org>
On Sat, Feb 05, 2011 at 05:00:57PM +0300, Dmitry V. Levin wrote:
> Будет так:
> $ readelf -aW /lib64/libc.so.6 |fgrep IFUNC
> 39: 0000000000085c50 55 IFUNC WEAK DEFAULT 12 strcasestr@@GLIBC_2.2.5
> 90: 000000000007b8c0 41 IFUNC GLOBAL DEFAULT 12 strcpy@@GLIBC_2.2.5
> 100: 0000000000080d40 41 IFUNC GLOBAL DEFAULT 12 __rawmemchr@@GLIBC_2.2.5
> 173: 000000000007c090 60 IFUNC GLOBAL DEFAULT 12 strncmp@@GLIBC_2.2.5
> 216: 000000000007d950 41 IFUNC GLOBAL DEFAULT 12 strrchr@@GLIBC_2.2.5
> 309: 000000000007f920 41 IFUNC WEAK DEFAULT 12 stpncpy@@GLIBC_2.2.5
> 387: 000000000007d920 41 IFUNC GLOBAL DEFAULT 12 strncpy@@GLIBC_2.2.5
> 518: 000000000007da20 41 IFUNC GLOBAL DEFAULT 12 strpbrk@@GLIBC_2.2.5
> 541: 000000000007ddb0 41 IFUNC GLOBAL DEFAULT 12 strspn@@GLIBC_2.2.5
> 602: 000000000007f920 41 IFUNC GLOBAL DEFAULT 12 __stpncpy@@GLIBC_2.2.5
> 751: 000000000007be80 41 IFUNC GLOBAL DEFAULT 12 strlen@@GLIBC_2.2.5
> 836: 00000000000848b0 55 IFUNC GLOBAL DEFAULT 12 strstr@@GLIBC_2.2.5
> 841: 000000000007b9d0 41 IFUNC GLOBAL DEFAULT 12 strcspn@@GLIBC_2.2.5
> 1219: 00000000000c3440 55 IFUNC GLOBAL DEFAULT 12 __sched_cpucount@@GLIBC_2.6
> 1401: 000000000007a310 41 IFUNC WEAK DEFAULT 12 index@@GLIBC_2.2.5
> 1656: 000000000007a310 41 IFUNC GLOBAL DEFAULT 12 strchr@@GLIBC_2.2.5
> 1695: 000000000007d950 41 IFUNC WEAK DEFAULT 12 rindex@@GLIBC_2.2.5
> 1718: 000000000007f810 41 IFUNC GLOBAL DEFAULT 12 __stpcpy@@GLIBC_2.2.5
> 1758: 0000000000085c50 55 IFUNC GLOBAL DEFAULT 12 __strcasestr@@GLIBC_2.2.5
> 1994: 0000000000080d40 41 IFUNC GLOBAL DEFAULT 12 rawmemchr@@GLIBC_2.2.5
> 2023: 000000000007a3c0 60 IFUNC GLOBAL DEFAULT 12 strcmp@@GLIBC_2.2.5
> 2055: 000000000007f810 41 IFUNC WEAK DEFAULT 12 stpcpy@@GLIBC_2.2.5
Интересно. В этом списке есть strcmp, но нет memcmp. Скорее всего,
strcmp будет работать даже быстрее, чем memcmp. Так что нет смысла
заниматься оптипизацией и заменять strcmp на memcmp (когда длина строки
уже известна).
>
> --
> ldv
next prev parent reply other threads:[~2011-02-05 14:52 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-31 15:23 Alexey Tourbin
2011-01-31 15:46 ` Dmitry V. Levin
2011-02-03 9:20 ` Alexey Tourbin
2011-02-03 9:55 ` REAL
2011-02-03 10:16 ` Alexey Tourbin
2011-02-03 10:45 ` REAL
2011-02-04 17:40 ` Dmitry V. Levin
2011-02-04 19:24 ` Dmitry V. Levin
2011-02-04 20:38 ` Alexey Tourbin
2011-02-04 22:21 ` Dmitry V. Levin
2011-02-04 23:00 ` Alexey Tourbin
2011-02-05 5:41 ` Alexey Tourbin
2011-02-05 14:00 ` Dmitry V. Levin
2011-02-05 14:52 ` Alexey Tourbin [this message]
2011-02-06 10:01 ` Alexey Tourbin
2011-02-06 21:19 ` Dmitry V. Levin
2011-02-05 21:11 ` Alexey Tourbin
2011-02-06 2:05 ` Alexey Tourbin
2011-02-06 21:22 ` Dmitry V. Levin
2011-02-06 21:29 ` Dmitry V. Levin
2011-01-31 15:58 ` REAL
2011-01-31 15:42 ` Alexey Tourbin
2011-01-31 16:17 ` REAL
2011-01-31 16:33 ` Afanasov Dmitry
2011-01-31 17:25 ` Alexey Tourbin
2011-01-31 21:46 ` Dmitry V. Levin
2011-01-31 23:33 ` Dmitry V. Levin
2011-02-01 4:02 ` Alexey Tourbin
2011-02-01 9:29 ` Dmitry V. Levin
2011-02-01 17:00 ` Alexey Tourbin
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