From: Szabolcs Nagy <nsz@port70.net>
To: musl@lists.openwall.com
Subject: Re: Re: a bug in bindtextdomain() and strip '.UTF-8'
Date: Sun, 29 Jan 2017 17:40:08 +0100 [thread overview]
Message-ID: <20170129164008.GU17692@port70.net> (raw)
In-Reply-To: <CAPG2z0_EHU=U0=pkd31b5fPN__-Ly_qd9W9ftK=1e40SDJHX1w@mail.gmail.com>
* He X <xw897002528@gmail.com> [2017-01-29 22:48:34 +0800]:
> 2. no other ways, musl will use generic config 100%, and then the
> exception, the run time error is hardcoded there; but i doubt if this
> really breaks binaries, the function is only called by libstdc++ itself.
> you cant only update the config, but does not update libstdc++. libstdc++
> exported the same abi for common binaries, wont break most dynamic-loaded
> binary in my view.
that's not how abi works.. you change the __c_locale typedef
of the generic config from int* to locale_t, such change
breaks abi and cannot be upstreamed to gcc. (it's unfortunate
that the c++ locale handling default for non-gnu systems
does not use posix locales correctly, but breaking abi
for all non-gnu systems is not an acceptable fix.)
with your change the abi of libstdc++ would look like
the current gnu abi:
$ grep __locale_struct libstdc++-v3/config/abi/post/x86_64-linux-gnu/baseline_symbols.txt |wc -l
72
the abi on a musl based system is like
$ nm -D /usr/lib/libstdc++.so.6 |grep __locale_struct |wc -l
0
so with your patch if a compiled binary refers to any one
of those 72 symbols then the dynamic linker will fail to
load it on a musl based system.
next prev parent reply other threads:[~2017-01-29 16:40 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-20 11:25 He X
2017-01-29 4:52 ` He X
2017-01-29 13:39 ` Szabolcs Nagy
2017-01-29 14:07 ` Rich Felker
2017-01-29 14:48 ` He X
2017-01-29 15:55 ` Rich Felker
2017-01-29 16:14 ` He X
2017-01-29 16:33 ` Rich Felker
2017-02-08 10:13 ` He X
2017-02-08 14:31 ` Rich Felker
2017-02-09 9:49 ` He X
2017-02-11 2:36 ` Rich Felker
2017-02-11 6:00 ` He X
2017-02-11 23:59 ` Rich Felker
2017-02-12 2:34 ` Rich Felker
2017-02-12 6:56 ` He X
2017-02-12 7:11 ` He X
2017-02-13 17:08 ` Rich Felker
2017-02-13 8:01 ` He X
2017-02-13 13:28 ` Rich Felker
2017-02-13 14:06 ` He X
2017-02-13 17:12 ` Rich Felker
2017-03-04 8:02 ` He X
2017-03-17 19:27 ` Rich Felker
2017-03-17 19:37 ` Rich Felker
2017-03-18 7:34 ` He X
2017-03-18 12:28 ` Rich Felker
2017-03-18 13:50 ` He X
2017-02-13 14:12 ` He X
2017-02-13 17:13 ` Rich Felker
2017-01-29 16:37 ` Rich Felker
2017-01-30 0:37 ` He X
2017-01-30 14:17 ` He X
2017-01-29 16:40 ` Szabolcs Nagy [this message]
2017-01-29 16:49 ` Rich Felker
2017-01-30 12:36 ` He X
2017-01-30 13:05 ` Szabolcs Nagy
2017-01-30 1:32 ` He X
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