A whole lot has changed since `sln` was introduced into glibc upstream with
this comment:
```
1998-07-21 07:10 H.J. Lu <hjl@gnu.org>
* elf/sln.c: New file.
```
Upstream glibc commit 9d141cae00c957096045d08fe504b4a2be66ab75
```
Author: Ulrich Drepper <drepper@redhat.com>
AuthorDate: Thu Aug 13 19:44:05 1998 +0000
```
Among other things for example, dynamic linking has been in use for the nearly
20 years that have passed and is now quite reliable. Further, many Fedora
systems now use an initramfs (dracut) which is basically a large filesystem of
utilities as a single blob; while it would require rebooting, one can easily
make hardlinks there.
Futher of course there's the increasing use of ostree in Fedora which which
consistently captures *all* of userspace and supports rollback, and additionaly
its presents a "read only" nature to admin tools and other processes that adds
significantly to system resilience.
The failure scenarios that could be recovered via `sln` seem to me to be very
small.
Applying this patch allows dropping a downstream Fedora patch to hardlink `sln` to `ldconfig`,
which was the source of a tricky bug:
https://github.com/projectatomic/rpm-ostree/pull/1173#issuecomment-355014583
that also impacts rpm-ostree. In practice today SELinux policy is fixed
in updates, but given there's no real reason for this binary to exist
anymore, let's drop it.
Upstream commit bad7a0c81f501fbbcc79af9eaa4b8254441c4a1f
- copy_file_range: New function to copy file data
- nptl: Consolidate pthread_{timed,try}join{_np}
- nptl: Implement pthread_self in libc.so (swbz#22635)
- math: Provide a C++ version of iseqsig (swbz#22377)
- elf: remove redundant __libc_enable_secure check from fillin_rpath
- math: Avoid signed shift overflow in pow (swbz#21309)
- x86: Add feature_1 to tcbhead_t (swbz#22563)
- x86: Update cancel_jmp_buf to match __jmp_buf_tag (swbz#22563)
- ld.so: Examine GLRO to detect inactive loader (swbz#20204)
- nscd: Fix nscd readlink argument aliasing (swbz#22446)
- elf: do not substitute dst in $LD_LIBRARY_PATH twice (swbz#22627)
- ldconfig: set LC_COLLATE to C (swbz#22505)
- math: New generic sincosf
- powerpc: st{r,p}cpy optimization for aligned strings
- CVE-2017-1000409: Count in expanded path in _dl_init_path (#1524867)
- CVE-2017-1000408: Compute correct array size in _dl_init_paths (#1524867)
- x86-64: Remove sysdeps/x86_64/fpu/s_cosf.S
- aarch64: Improve strcmp unaligned performance
Upstream commit: 37ac8e635a29810318f6d79902102e2e96b2b5bf
- Add elision tunables. Drop related configure flag.
- Linux: Implement interfaces for memory protection keys
- math: Add _Float64, _Float32x function aliases
- math: Use sign as double for reduced case in sinf
- math: fix sinf(NAN)
- math: s_sinf.c: Replace floor with simple casts
- et_EE locale: Base collation on iso14651_t1 (swbz#22517)
- tr_TR locale: Base collation on iso14651_t1 (swbz#22527)
- hr_HR locale: Avoid single code points for digraphs in LC_TIME (swbz#10580)
- S390: Fix backtrace in vdso functions
Upstream commit: 7863a7118112fe502e8020a0db0fa74fef281f29
- math: New generic sinf (swbz#5997)
- is_IS locale: Base collation on iso14651_t1 (swbz#22519)
- intl: Improve reproducibility by using bison (swbz#22432)
- sr_RS, bs_BA locales: make collation rules the same as for hr_HR (wbz#22534)
- hr_HR locale: various updates (swbz#10580)
- x86: Make a space in jmpbuf for shadow stack pointer
- malloc: Fix integer overflow when tcache is enabled (swbz#22375)
- locale: make forward accent sorting the default in collating (swbz#17750)
Upstream commit: a55430cb0e261834ce7a4e118dd9e0f2b7fb14bc
- elf: Properly compute offsets of note descriptor and next note (swbz#22370)
- cs_CZ locale: Base collation on iso14651_t1 (swbz#22336)
- Implement the mlock2 function
- Add _Float64x function aliases
- elf: Consolidate link map sorting
- pl_PL locale: Base collation on iso14651_t1 (swbz#22469)
- nss: Export nscd hash function as __nss_hash (swbz#22459)
Upstream commit: cccb6d4e87053ed63c74aee063fa84eb63ebf7b8
- sigwait can fail with EINTR (#1516394)
- Add memfd_create function
- resolv: Fix p_secstodate overflow handling (swbz#22463)
- resolv: Obsolete p_secstodate
- Avoid use of strlen in getlogin_r (swbz#22447)
- lv_LV locale: fix collation (swbz#15537)
- S390: Add cfi information for start routines in order to stop unwinding
- aarch64: Optimized memset for falkor
Upstream commit: 6b86036452b9ac47b4ee7789a50f2f37df7ecc4f
- CVE-2017-15804: glob: Fix buffer overflow during GLOB_TILDE unescaping
- powerpc: Use latest string function optimization for internal function calls
- math: No _Float128 support for ppc64le -mlong-double-64 (swbz#22402)
- tpi_PG locale: Fix wrong d_fmt
- aarch64: Disable lazy symbol binding of TLSDESC
- tpi_PG locale: fix syntax error (swbz#22382)
- i586: Use conditional branches in strcpy.S (swbz#22353)
- ffsl, ffsll: Declare under __USE_MISC, not just __USE_GNU
- csb_PL locale: Fix abmon/mon for March (swbz#19485)
- locale: Various yesstr/nostr/yesexpr/noexpr fixes (swbz#15260, swbz#15261)
- localedef: Add --no-warnings/--warnings option
- powerpc: Replace lxvd2x/stxvd2x with lvx/stvx in P7's memcpy/memmove
- locale: Use ASCII as much as possible in LC_MESSAGES
- Add new locale yuw_PG (swbz#20952)
- malloc: Add single-threaded path to malloc/realloc/calloc/memalloc
- i386: Replace assembly versions of e_powf with generic e_powf.c
- i386: Replace assembly versions of e_log2f with generic e_log2f.c
- x86-64: Add powf with FMA
- x86-64: Add logf with FMA
- i386: Replace assembly versions of e_logf with generic e_logf.c
- i386: Replace assembly versions of e_exp2f with generic e_exp2f.c
- x86-64: Add exp2f with FMA
- i386: Replace assembly versions of e_expf with generic e_expf.c
Upstream commit: 63b4baa44e8d22501c433c4093aa3310f91b6aa2
- Use make -O to serialize make output
- sysconf: Fix missing definition of UIO_MAXIOV on Linux (#1504165)
- Install correct bits/long-double.h for MIPS64 (swbz#22322)
- malloc: Fix deadlock in _int_free consistency check
- x86-64: Don't set GLRO(dl_platform) to NULL (swbz#22299)
- math: Add _Float128 function aliases
- locale: Add new locale mjw_IN (swbz#13994)
- aarch64: Rewrite elf_machine_load_address using _DYNAMIC symbol
- powerpc: fix check-before-set in SET_RESTORE_ROUND
- locale: Use U+202F as thousands separators in pl_PL locale (swbz#16777)
- math: Use __f128 to define FLT128_* constants in include/float.h for old GCC
- malloc: Improve malloc initialization sequence (swbz#22159)
- malloc: Use relaxed atomics for malloc have_fastchunks
- locale: New locale ca_ES@valencia (swbz#2522)
- math: Let signbit use the builtin in C++ mode with gcc < 6.x (swbz#22296)
- locale: Place monetary symbol in el_GR, el_CY after the amount (swbz#22019)
The former is more reliable because glibcsrcdir changes in case of a
release off the release/*/master branch (which does not have a
tarball), but glibcversion remains the same.
Upstream commit: c38a4bfd596db2be2b9c1f96715bdc833eab760a
- Switch to .9000 version numbers during development
- malloc: Use compat_symbol_reference in libmcheck (swbz#22050)
Upstream commit: 596f70134a8f11967c65c1d55a94a3a2718c731d
- Silence -O3 -Wall warning in malloc/hooks.c with GCC 7 (swbz#22052)
- locale: No warning for non-symbolic character (swbz#22295)
- locale: Allow "" int_curr_Symbol (swbz#22294)
- locale: Fix localedef exit code (swbz#22292)
- nptl: Preserve error in setxid thread broadcast in coredumps (swbz#22153)
- powerpc: Avoid putting floating point values in memory (swbz#22189)
- powerpc: Fix the carry bit on mpn_[add|sub]_n on POWER7 (swbz#22142)
- Support profiling PIE (swbz#22284)
Upstream commit: 1e26d35193efbb29239c710a4c46a64708643320
- malloc: Fix tcache leak after thread destruction (swbz#22111)
- powerpc: Fix IFUNC for memrchr.
- aarch64: Optimized implementation of memmove for Qualcomm Falkor
- Always do locking when iterating over list of streams (swbz#15142)
- abort: Do not flush stdio streams (swbz#15436)
Upstream commit: f4a6be2582b8dfe8adfa68da3dd8decf566b3983
- malloc: Abort on heap corruption, without a backtrace (swbz#21754)
- getaddrinfo: Return EAI_NODATA for gethostbyname2_r with NO_DATA (swbz#21922)
- getaddrinfo: Fix error handling in gethosts (swbz#21915) (swbz#21922)
- Place $(elf-objpfx)sofini.os last (swbz#22051)
- Various locale fixes (swbz#15332, swbz#22044)
Upstream commit: 5f9409b787c5758fc277f8d1baf7478b752b775d
- Drop glibc-rh952799.patch, applied upstream (#952799, swbz#22025)
- Various locale fixes (swbz#22022, swbz#22038, swbz#21951, swbz#13805,
swbz#21971, swbz#21959)
- MIPS/o32: Fix internal_syscall5/6/7 (swbz#21956)
- AArch64: Fix procfs.h not to expose stdint.h types
- iconv_open: Fix heap corruption on gconv_init failure (swbz#22026)
- iconv: Mangle __btowc_fct even without __init_fct (swbz#22025)
- Fix bits/math-finite.h _MSUF_ expansion namespace (swbz#22028)
- Provide a C++ version of iszero that does not use __MATH_TG (swbz#21930)
Addressed by this upstream commit in a different way:
commit eac43cbb8d808a40004aa0a4a286f5c5155beccb
Author: Florian Weimer <fweimer@redhat.com>
Date: Thu Aug 10 15:58:28 2017 +0200
malloc: Avoid optimizer warning with GCC 7 and -O3
