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author | Joseph Myers <joseph@codesourcery.com> | 2018-02-07 14:57:31 +0000 |
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committer | Joseph Myers <joseph@codesourcery.com> | 2018-02-07 14:57:31 +0000 |
commit | 8b4a118222c7ed41bc653943b542915946dff1dd (patch) | |
tree | d09d372ae0f732b2b1693666f9a3a73ecbbd074d /misc/makedev.c | |
parent | Fix -Os strcoll, wcscoll, build (bug 21313). (diff) | |
download | glibc-8b4a118222c7ed41bc653943b542915946dff1dd.tar.gz glibc-8b4a118222c7ed41bc653943b542915946dff1dd.tar.bz2 glibc-8b4a118222c7ed41bc653943b542915946dff1dd.zip |
Fix -Os gnu_dev_* linknamespace, localplt issues (bug 15105, bug 19463).
Building with -Os produces linknamespace and localplt failures for,
among other functions, gnu_dev_major, gnu_dev_minor and
gnu_dev_makedev.
The issue is that those functions are not inlined when building with
-Os. While one could force them to be inlined in that case, it seems
more natural to fix this issue similarly to other namespace issues.
Thus, this patch makes gnu_dev_* into weak aliases for hidden symbols
__gnu_dev_*; __gnu_dev_* are then defined as inlines in the internal
include/sys/sysmacros.h, and uses of gnu_dev_* (often via the macros
major, minor and makedev) for which there are namespace issues are
changed to use __gnu_dev_*; where there are no namespace issues, use
of libc_hidden_proto serves to avoid unnecessary local PLT entry use.
Tested for x86_64, (a) without -Os, to verify the testsuite continues
to pass without problems and that the functions called under their new
names continue to be inlined as expected in that case; (b) with -Os,
to verify that the linknamespace and localplt failures in question go
away (but because of other such failures present, neither of the
relevant bugs can yet be closed).
[BZ #15105]
[BZ #19463]
* include/sys/sysmacros.h [!_ISOMAC]
(__SYSMACROS_NEED_IMPLEMENTATION): Define macro.
[!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC]
(_SYS_SYSMACROS_H_WRAPPER): Likewise.
[!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (gnu_dev_major): Use
libc_hidden_proto.
[!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (gnu_dev_minor): Likewise.
[!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (gnu_dev_makedev):
Likewise.
[!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (__SYSMACROS_DECL_TEMPL):
Undefine and redefine to add use __gnu_dev_ prefix.
[!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (__SYSMACROS_IMPL_TEMPL):
Likewise.
[!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (__gnu_dev_major): Declare
and define as hidden inline function.
[!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (__gnu_dev_minor):
Likewise.
[!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (__gnu_dev_makedev):
Likewise.
* misc/makedev.c (OUT_OF_LINE_IMPL_TEMPL): Use __gnu_dev_ prefix.
(gnu_dev_major): Use weak_alias and libc_hidden_weak.
(gnu_dev_minor): Likewise.
(gnu_dev_makedev): Likewise.
* csu/check_fds.c (check_one_fd): Use __gnu_dev_makedev instead of
makedev.
* posix/wordexp.c (exec_comm_child): Likewise.
* sysdeps/mach/hurd/xmknodat.c (__xmknodat): Use __gnu_dev_minor
instead of minor and __gnu_dev_major instead of major.
* sysdeps/unix/sysv/linux/device-nrs.h (DEV_TTY_P): Use
__gnu_dev_major instead of major.
* sysdeps/unix/sysv/linux/pathconf.c (distinguish_extX): Use
__gnu_dev_major instead of gnu_dev_major and __gnu_dev_minor
instead of gnu_dev_minor.
* sysdeps/unix/sysv/linux/ptsname.c (MASTER_P): Likewise.
(SLAVE_P): Likewise.
(__ptsname_internal): Use __gnu_dev_minor instead of minor.
* sysdeps/unix/sysv/linux/ttyname.h (is_pty): Use __gnu_dev_major
instead of major.
Diffstat (limited to 'misc/makedev.c')
-rw-r--r-- | misc/makedev.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/misc/makedev.c b/misc/makedev.c index 5da14cedee..bc5bfc577a 100644 --- a/misc/makedev.c +++ b/misc/makedev.c @@ -23,8 +23,14 @@ #include <sys/sysmacros.h> #define OUT_OF_LINE_IMPL_TEMPL(rtype, name, proto) \ - rtype gnu_dev_##name proto + rtype __gnu_dev_##name proto __SYSMACROS_DEFINE_MAJOR(OUT_OF_LINE_IMPL_TEMPL) +weak_alias (__gnu_dev_major, gnu_dev_major) +libc_hidden_weak (gnu_dev_major) __SYSMACROS_DEFINE_MINOR(OUT_OF_LINE_IMPL_TEMPL) +weak_alias (__gnu_dev_minor, gnu_dev_minor) +libc_hidden_weak (gnu_dev_minor) __SYSMACROS_DEFINE_MAKEDEV(OUT_OF_LINE_IMPL_TEMPL) +weak_alias (__gnu_dev_makedev, gnu_dev_makedev) +libc_hidden_weak (gnu_dev_makedev) |