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* Linux: Support __IPC_64 in sysvctl *ctl command arguments (bug 29771)Florian Weimer2022-11-111-0/+1
| | | | | | | | | | | | | | | | | | Old applications pass __IPC_64 as part of the command argument because old glibc did not check for unknown commands, and passed through the arguments directly to the kernel, without adding __IPC_64. Applications need to continue doing that for old glibc compatibility, so this commit enables this approach in current glibc. For msgctl and shmctl, if no translation is required, make direct system calls, as we did before the time64 changes. If translation is required, mask __IPC_64 from the command argument. For semctl, the union-in-vararg argument handling means that translation is needed on all architectures. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> (cherry picked from commit 22a46dee24351fd5f4f188ad80554cad79c82524)
* linux: Fix fstatat on MIPSn64 (BZ #29730)Aurelien Jarno2022-11-021-0/+1
| | | | | | | | | | | | | Commit 6e8a0aac2f883 ("time: Fix overflow itimer tests on 32-bit systems") changed in_time_t_range to assume a 32-bit time_t. This broke fstatat on MIPSn64 that was using it with a 64-bit time_t due to difference between stat and stat64. This commit fix that by adding a MIPSn64 specific version, which bypasses the EOVERFLOW tests. Resolves: BZ #29730 Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> (cherry picked from commit 7457b7eef8dfe8cc48e55b9f9837df6dd397b80d)
* linux: Fix generic struct_stat for 64 bit time (BZ# 29657)Adhemerval Zanella2022-10-251-0/+2
| | | | | | | | | | | | | | | | | | | The generic Linux struct_stat misses the conditionals to use bits/struct_stat_time64_helper.h in the __USE_TIME_BITS64 for architecture that uses __TIMESIZE == 32 (currently csky and nios2). Since newer ports should not support 32 bit time_t, the generic implementation should be used as default. For arm, hppa, and sh a copy of default struct_stat is added, while for csky and nios a new one based on generic is used, along with conditionals to use bits/struct_stat_time64_helper.h. The default struct_stat is also replaced with the generic one. Checked on aarch64-linux-gnu and arm-linux-gnueabihf. (cherry picked from commit 7a6ca82f8007ddbd43e2b8fce806ba7101ee47f5)
* Avoid undefined behaviour in ibm128 implementation of llroundl (BZ #29488)Aurelien Jarno2022-10-241-0/+2
| | | | | | | | | Detecting an overflow edge case depended on signed overflow of a long long. Replace the additions and the overflow checks by __builtin_add_overflow(). Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com> (cherry picked from commit 2b5478569e72ee4820a6e163d306690c9c0eaf5e)
* elf: Do not completely clear reused namespace in dlmopen (bug 29600)Florian Weimer2022-10-141-0/+1
| | | | | | | | | | | | | | The data in the _ns_debug member must be preserved, otherwise _dl_debug_initialize enters an infinite loop. To be conservative, only clear the libc_map member for now, to fix bug 29528. Fixes commit d0e357ff45a75553dee3b17ed7d303bfa544f6fe ("elf: Call __libc_early_init for reused namespaces (bug 29528)"), by reverting most of it. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com> (cherry picked from commit 2c42257314536b94cc8d52edede86e94e98c1436)
* nss: Fix tst-nss-files-hosts-long on single-stack hosts (bug 24816)Florian Weimer2022-10-131-0/+1
| | | | | | | | | | getent implicitly passes AI_ADDRCONFIG to getaddrinfo by default. Use --no-addrconfig to suppress that, so that both IPv4 and IPv6 lookups succeed even if the address family is not supported by the host. Reviewed-by: Carlos O'Donell <carlos@redhat.com> (cherry picked from commit c75d20b5b27b0a60f0678236f51a4d3b0b058c00)
* nss: Implement --no-addrconfig option for getentFlorian Weimer2022-10-131-0/+7
| | | | | | | | The ahosts, ahostsv4, ahostsv6 commands unconditionally pass AI_ADDRCONFIG to getaddrinfo, which is not always desired. Reviewed-by: Carlos O'Donell <carlos@redhat.com> (cherry picked from commit a623f13adfac47c8634a7288e08f821a846bc650)
* Ensure calculations happen with desired rounding mode in y1lf128Michael Hudson-Doyle2022-10-091-0/+1
| | | | | | | | | | | | | math/test-float128-y1 fails on x86_64 and ppc64el with gcc 12 and -O3, because code inside a block guarded by SET_RESTORE_ROUNDL is being moved after the rounding mode has been restored. Use math_force_eval to prevent this (and insert some math_opt_barrier calls to prevent code from being moved before the rounding mode is set). Fixes #29463 Reviewed-By: Wilco Dijkstra <Wilco.Dijkstra@arm.com> (cherry picked from commit 2b274fd8c9c776cf70fcdb8356e678ada522a7b0)
* nscd: Drop local address tuple variable [BZ #29607]Siddhesh Poyarekar2022-10-041-0/+2
| | | | | | | | | | | | | | | | When a request needs to be resent (e.g. due to insufficient buffer space), the references to subsequent tuples in the local variable are stale and should not be used. This used to work by accident before, but since 1d495912a it no longer does. Instead of trying to reset it, just let gethostbyname4_r write into TUMPBUF6 for us, thus maintaining a consistent state at all times. This is now consistent with what is done in gaih_inet for getaddrinfo. Resolves: BZ #29607 Reported-by: Holger Hoffstätte <holger@applied-asynchrony.com> Tested-by: Holger Hoffstätte <holger@applied-asynchrony.com> Reviewed-by: Carlos O'Donell <carlos@redhat.com> (cherry picked from commit 6e33e5c4b73cea7b8aa3de0947123db16200fb65)
* stdlib: Fix __getrandom_nocancel type and arc4random usage (BZ #29638)Adhemerval Zanella2022-09-301-0/+1
| | | | | | | | | | Using an unsigned type prevents the fallback to be used if kernel does not support getrandom syscall. Checked on x86_64-linux-gnu. Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com> (cherry picked from commit 13db9ee2cb3b77e25f852be7d6952882e1be6f00)
* m68k: Enforce 4-byte alignment on internal locks (BZ #29537)Adhemerval Zanella2022-09-211-0/+1
| | | | | | | | | | A new internal definition, __LIBC_LOCK_ALIGNMENT, is used to force the 4-byte alignment only for m68k, other architecture keep the natural alignment of the type used internally (and hppa does not require 16-byte alignment for kernel-assisted CAS). Reviewed-by: Florian Weimer <fweimer@redhat.com> (cherry picked from commit aeb4d2e9815d459e2640a31f5abb8ef803830107)
* gconv: Use 64-bit interfaces in gconv_parseconfdir (bug 29583)Florian Weimer2022-09-211-0/+1
| | | | | | | | | It's possible that inode numbers are outside the 32-bit range. The existing code only handles the in-libc case correctly, and still uses the legacy interfaces when building iconv. Suggested-by: Helge Deller <deller@gmx.de> (cherry picked from commit f97905f24631097af325d6a231093071c3077a5f)
* elf: Implement force_first handling in _dl_sort_maps_dfs (bug 28937)Florian Weimer2022-09-201-0/+1
| | | | | | | | | | | | | | The implementation in _dl_close_worker requires that the first element of l_initfini is always this very map (“We are always the zeroth entry, and since we don't include ourselves in the dependency analysis start at 1.”). Rather than fixing that assumption, this commit adds an implementation of the force_first argument to the new dependency sorting algorithm. This also means that the directly dlopen'ed shared object is always initialized last, which is the least surprising behavior in the presence of cycles. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> (cherry picked from commit 1df71d32fe5f5905ffd5d100e5e9ca8ad6210891)
* NEWS: Note bug 12154 and bug 29305 as fixedFlorian Weimer2022-09-131-0/+2
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* nscd: Fix netlink cache invalidation if epoll is used [BZ #29415]Fabian Vogt2022-09-061-0/+1
| | | | | | | | | | | | | | | | | | | | | | Processes cache network interface information such as whether IPv4 or IPv6 are enabled. This is only checked again if the "netlink timestamp" provided by nscd changed, which is triggered by netlink socket activity. However, in the epoll handler for the netlink socket, it was missed to assign the new timestamp to the nscd database. The handler for plain poll did that properly, copy that over. This bug caused that e.g. processes which started before network configuration got unusuable addresses from getaddrinfo, like IPv6 only even though only IPv4 is available: https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/issues/1041 It's a bit hard to reproduce, so I verified this by checking the timestamp on calls to __check_pf manually. Without this patch it's stuck at 1, now it's increasing on network changes as expected. Signed-off-by: Fabian Vogt <fvogt@suse.de> (cherry picked from commit 02ca25fef2785974011e9c5beecc99b900b69fd7)
* Add NEWS entry for CVE-2022-39046Siddhesh Poyarekar2022-09-061-0/+7
| | | | (cherry picked from commit 76fe56020e7ef354685b2284580ac1630c078a2b)
* elf: Restore how vDSO dependency is printed with LD_TRACE_LOADED_OBJECTS (BZ ↵Adhemerval Zanella2022-08-311-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | #29539) The d7703d3176d225d5743b21811d888619eba39e82 changed how vDSO like dependencies are printed, instead of just the name and address it follows other libraries mode and prints 'name => path'. Unfortunately, this broke some ldd consumer that uses the output to filter out the program's dependencies. For instance CMake bundleutilities module [1], where GetPrequirite uses the regex to filter out 'name => path' [2]. This patch restore the previous way to print just the name and the mapping address. Checked on x86_64-linux-gnu. [1] https://github.com/Kitware/CMake/tree/master/Tests/BundleUtilities [2] https://github.com/Kitware/CMake/blob/master/Modules/GetPrerequisites.cmake#L733 Reviewed-by: Florian Weimer <fweimer@redhat.com> (cherry picked from commit 1e903124cec4492463d075c6c061a2a772db77bf)
* elf: Call __libc_early_init for reused namespaces (bug 29528)Florian Weimer2022-08-301-0/+1
| | | | | | | | | | | | libc_map is never reset to NULL, neither during dlclose nor on a dlopen call which reuses the namespace structure. As a result, if a namespace is reused, its libc is not initialized properly. The most visible result is a crash in the <ctype.h> functions. To prevent similar bugs on namespace reuse from surfacing, unconditionally initialize the chosen namespace to zero using memset. (cherry picked from commit d0e357ff45a75553dee3b17ed7d303bfa544f6fe)
* NEWS: Add entry for bug 28846Arjun Shankar2022-08-221-0/+1
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* alpha: Fix generic brk system call emulation in __brk_call (bug 29490)Florian Weimer2022-08-221-0/+1
| | | | | | | | | | The kernel special-cases the zero argument for alpha brk, and we can use that to restore the generic Linux error handling behavior. Fixes commit b57ab258c1140bc45464b4b9908713e3e0ee35aa ("Linux: Introduce __brk_call for invoking the brk system call"). (cherry picked from commit e7ad26ee3cb74e61d0637c888f24dd478d77af58)
* Linux: Terminate subprocess on late failure in tst-pidfd (bug 29485)Florian Weimer2022-08-161-0/+1
| | | | | Reviewed-by: Carlos O'Donell <carlos@redhat.com> (cherry picked from commit f82e05ebb295cadd35f7372f652c72264da810ad)
* dlfcn: Pass caller pointer to static dlopen implementation (bug 29446)Florian Weimer2022-08-041-0/+7
| | | | | | | Fixes commit 0c1c3a771eceec46e66ce1183cf988e2303bd373 ("dlfcn: Move dlopen into libc"). (cherry picked from commit ed0185e4129130cbe081c221efb758fb400623ce)
* Update NEWS bug list.Carlos O'Donell2022-07-291-11/+99
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* arc4random: simplify design for better safetyJason A. Donenfeld2022-07-271-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rather than buffering 16 MiB of entropy in userspace (by way of chacha20), simply call getrandom() every time. This approach is doubtlessly slower, for now, but trying to prematurely optimize arc4random appears to be leading toward all sorts of nasty properties and gotchas. Instead, this patch takes a much more conservative approach. The interface is added as a basic loop wrapper around getrandom(), and then later, the kernel and libc together can work together on optimizing that. This prevents numerous issues in which userspace is unaware of when it really must throw away its buffer, since we avoid buffering all together. Future improvements may include userspace learning more from the kernel about when to do that, which might make these sorts of chacha20-based optimizations more possible. The current heuristic of 16 MiB is meaningless garbage that doesn't correspond to anything the kernel might know about. So for now, let's just do something conservative that we know is correct and won't lead to cryptographic issues for users of this function. This patch might be considered along the lines of, "optimization is the root of all evil," in that the much more complex implementation it replaces moves too fast without considering security implications, whereas the incremental approach done here is a much safer way of going about things. Once this lands, we can take our time in optimizing this properly using new interplay between the kernel and userspace. getrandom(0) is used, since that's the one that ensures the bytes returned are cryptographically secure. But on systems without it, we fallback to using /dev/urandom. This is unfortunate because it means opening a file descriptor, but there's not much of a choice. Secondly, as part of the fallback, in order to get more or less the same properties of getrandom(0), we poll on /dev/random, and if the poll succeeds at least once, then we assume the RNG is initialized. This is a rough approximation, as the ancient "non-blocking pool" initialized after the "blocking pool", not before, and it may not port back to all ancient kernels, though it does to all kernels supported by glibc (≥3.2), so generally it's the best approximation we can do. The motivation for including arc4random, in the first place, is to have source-level compatibility with existing code. That means this patch doesn't attempt to litigate the interface itself. It does, however, choose a conservative approach for implementing it. Cc: Adhemerval Zanella Netto <adhemerval.zanella@linaro.org> Cc: Florian Weimer <fweimer@redhat.com> Cc: Cristian Rodríguez <crrodriguez@opensuse.org> Cc: Paul Eggert <eggert@cs.ucla.edu> Cc: Mark Harris <mark.hsj@gmail.com> Cc: Eric Biggers <ebiggers@kernel.org> Cc: linux-crypto@vger.kernel.org Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* LoongArch: Update NEWS and README for the LoongArch port.caiyinyu2022-07-261-0/+8
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* stdlib: Add arc4random, arc4random_buf, and arc4random_uniform (BZ #4417)Adhemerval Zanella Netto2022-07-221-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The implementation is based on scalar Chacha20 with per-thread cache. It uses getrandom or /dev/urandom as fallback to get the initial entropy, and reseeds the internal state on every 16MB of consumed buffer. To improve performance and lower memory consumption the per-thread cache is allocated lazily on first arc4random functions call, and if the memory allocation fails getentropy or /dev/urandom is used as fallback. The cache is also cleared on thread exit iff it was initialized (so if arc4random is not called it is not touched). Although it is lock-free, arc4random is still not async-signal-safe (the per thread state is not updated atomically). The ChaCha20 implementation is based on RFC8439 [1], omitting the final XOR of the keystream with the plaintext because the plaintext is a stream of zeros. This strategy is similar to what OpenBSD arc4random does. The arc4random_uniform is based on previous work by Florian Weimer, where the algorithm is based on Jérémie Lumbroso paper Optimal Discrete Uniform Generation from Coin Flips, and Applications (2013) [2], who credits Donald E. Knuth and Andrew C. Yao, The complexity of nonuniform random number generation (1976), for solving the general case. The main advantage of this method is the that the unit of randomness is not the uniform random variable (uint32_t), but a random bit. It optimizes the internal buffer sampling by initially consuming a 32-bit random variable and then sampling byte per byte. Depending of the upper bound requested, it might lead to better CPU utilization. Checked on x86_64-linux-gnu, aarch64-linux, and powerpc64le-linux-gnu. Co-authored-by: Florian Weimer <fweimer@redhat.com> Reviewed-by: Yann Droneaud <ydroneaud@opteya.com> [1] https://datatracker.ietf.org/doc/html/rfc8439 [2] https://arxiv.org/pdf/1304.1916.pdf
* stdlib: Implement mbrtoc8, c8rtomb, and the char8_t typedef.Tom Honermann2022-07-061-0/+9
| | | | | | | | | | | | | | | | | This change provides implementations for the mbrtoc8 and c8rtomb functions adopted for C++20 via WG21 P0482R6 and for C2X via WG14 N2653. It also provides the char8_t typedef from WG14 N2653. The mbrtoc8 and c8rtomb functions are declared in uchar.h in C2X mode or when the _GNU_SOURCE macro or C++20 __cpp_char8_t feature test macro is defined. The char8_t typedef is declared in uchar.h in C2X mode or when the _GNU_SOURCE macro is defined and the C++20 __cpp_char8_t feature test macro is not defined (if __cpp_char8_t is defined, then char8_t is a builtin type). Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* linux: Add mount_setattrAdhemerval Zanella2022-07-051-4/+4
| | | | | | | | | | It was added on Linux 5.12 (2a1867219c7b27f928e2545782b86daaf9ad50bd) to allow change the properties of a mount or a mount tree using file descriptors which the new mount api is based on. Checked on x86_64-linux-gnu. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* linux: Add open_treeAdhemerval Zanella2022-07-051-5/+5
| | | | | | | It was added on Linux 5.2 (a07b20004793d8926f78d63eb5980559f7813404) to return a O_PATH-opened file descriptor to an existing mountpoint. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* linux: Add fspickAdhemerval Zanella2022-07-051-4/+5
| | | | | | | | | It was added on Linux 5.2 (cf3cba4a429be43e5527a3f78859b1bfd9ebc5fb) that can be used to pick an existing mountpoint into an filesystem context which can thereafter be used to reconfigure a superblock with fsconfig syscall. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* linux: Add fsconfigAdhemerval Zanella2022-07-051-4/+4
| | | | | | | | | | | | | It was added on Linux 5.2 (ecdab150fddb42fe6a739335257949220033b782) as a way to a configure filesystem creation context and trigger actions upon it, to be used in conjunction with fsopen, fspick and fsmount. The fsconfig_command commands are currently only defined as an enum, so they can't be checked on tst-mount-consts.py with current test support. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* locale: localdef input files are now encoded in UTF-8Florian Weimer2022-07-051-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Previously, they were assumed to be in ISO-8859-1, and that the output charset overlapped with ISO-8859-1 for the characters actually used. However, this did not work as intended on many architectures even for an ISO-8859-1 output encoding because of the char signedness bug in lr_getc. Therefore, this commit switches to UTF-8 without making provisions for backwards compatibility. The following Elisp code can be used to convert locale definition files to UTF-8: (defun glibc/convert-localedef (from to) (interactive "r") (save-excursion (save-restriction (narrow-to-region from to) (goto-char (point-min)) (save-match-data (while (re-search-forward "<U\\([0-9a-fA-F]+\\)>" nil t) (let* ((codepoint (string-to-number (match-string 1) 16)) (converted (cond ((memq codepoint '(?/ ?\ ?< ?>)) (string ?/ codepoint)) ((= codepoint ?\") "<U0022>") (t (string codepoint))))) (replace-match converted t))))))) Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* linux: Add move_mountAdhemerval Zanella2022-06-241-4/+4
| | | | | | | | | It was added on Linux 5.2 (2db154b3ea8e14b04fee23e3fdfd5e9d17fbc6ae) as way t move a mount from one place to another and, in the next commit, allow to attach an unattached mount tree. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* linux: Add fsmountAdhemerval Zanella2022-06-241-4/+4
| | | | | | | | | | It was added on 5.2 (93766fbd2696c2c4453dd8e1070977e9cd4e6b6d) to provide a way by which a filesystem opened with fsopen and configured by a series of fsconfig calls can have a detached mount object created for it. Tested-by: Carlos O'Donell <carlos@redhat.com> Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* linux: Add fsopenAdhemerval Zanella2022-06-241-0/+5
| | | | | | | | | It was added on Linux 5.2 (24dcb3d90a1f67fe08c68a004af37df059d74005) to start the process of preparing to create a superblock that will then be mountable, using an fd as a context handle. Tested-by: Carlos O'Donell <carlos@redhat.com> Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* resolv: Implement no-aaaa stub resolver optionFlorian Weimer2022-06-241-0/+12
| | | | Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* linux: Add process_mreleaseAdhemerval Zanella2022-06-021-0/+5
| | | | | | | | | Added in Linux 5.15 (884a7e5964e06ed93c7771c0d7cf19c09a8946f1), the new syscalls allows a caller to free the memory of a dying target process. Checked on x86_64-linux-gnu. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* linux: Add process_madviseAdhemerval Zanella2022-06-021-0/+4
| | | | | | | | | | It was added on Linux 5.10 (ecb8ac8b1f146915aa6b96449b66dd48984caacc) with the same functionality as madvise but using a pidfd of the target process. Checked on x86_64-linux-gnu and i686-linux-gnu. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* linux: Add pidfd_send_signalAdhemerval Zanella2022-05-171-3/+3
| | | | | | | | | | | | | | This was added on Linux 5.1(3eb39f47934f9d5a3027fe00d906a45fe3a15fad) as a way to avoid the race condition of using kill (where PID might be reused by the kernel between between obtaining the pid and sending the signal). If the siginfo_t argument is NULL then pidfd_send_signal is equivalent to kill. If it is not NULL pidfd_send_signal is equivalent to rt_sigqueueinfo. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* linux: Add pidfd_getfdAdhemerval Zanella2022-05-171-3/+3
| | | | | | | | | | This was added on Linux 5.6 (8649c322f75c96e7ced2fec201e123b2b073bf09) as a way to retrieve a file descriptors for another process though pidfd (created either with CLONE_PIDFD or pidfd_getfd). The functionality is similar to recvmmsg SCM_RIGHTS. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* linux: Add pidfd_openAdhemerval Zanella2022-05-171-0/+4
| | | | | | | | | This was added on Linux 5.3 (32fcb426ec001cb6d5a4a195091a8486ea77e2df) as a way to retrieve a pid file descriptors for process that has not been created CLONE_PIDFD (by usual fork/clone). Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* Remove dl-librecon.h header.Adhemerval Zanella2022-05-161-0/+2
| | | | | | | | | | | | | | | | | | | | | | | The Linux version used by i686 and m68k provide three overrrides for generic code: 1. DISTINGUISH_LIB_VERSIONS to print additional information when libc5 is used by a dependency. 2. EXTRA_LD_ENVVARS to that enabled LD_LIBRARY_VERSION environment variable. 3. EXTRA_UNSECURE_ENVVARS to add two environment variables related to aout support. None are really requires, it has some decades since libc5 or aout suppported was removed and Linux even remove support for aout files. The LD_LIBRARY_VERSION is also dead code, dl_correct_cache_id is not used anywhere. Checked on x86_64-linux-gnu and i686-linux-gnu. Reviewed-by: Florian Weimer <fweimer@redhat.com>
* Remove kernel version checkAdhemerval Zanella2022-05-161-0/+5
| | | | | | | | | | | | | | | | | | | | The kernel version check is used to avoid glibc to run on older kernels where some syscall are not available and fallback code are not enabled to handle graciously fail. However, it does not prevent if the kernel does not correctly advertise its version through vDSO note, uname or procfs. Also kernel version checks are sometime not desirable by users, where they want to deploy on different system with different kernel version knowing the minimum set of syscall is always presented on such systems. The kernel version check has been removed along with the LD_ASSUME_KERNEL environment variable. The minimum kernel used to built glibc is still provided through NT_GNU_ABI_TAG ELF note and also printed when libc.so is issued. Checked on x86_64-linux-gnu.
* NEWS: Mention DT_RELR supportH.J. Lu2022-04-261-1/+6
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* NEWS: Move PLT tracking slowdown to glibc 2.35.Carlos O'Donell2022-04-121-3/+3
| | | | | | | In commit 063f9ba220f434c7f30dd65c4cff17c0c458a7cf the NEWS section was accidentally added to the glibc 2.34 NEWS section. The NEWS entry should have been added to glibc 2.35 which contained the committed fix. This moves the NEWS entry to correct section.
* elf: Remove LD_USE_LOAD_BIASAdhemerval Zanella2022-02-101-0/+3
| | | | | | | | It is solely for prelink with PIE executables [1]. [1] https://sourceware.org/legacy-ml/libc-hacker/2003-11/msg00127.html Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* malloc: Remove LD_TRACE_PRELINKING usage from mtraceAdhemerval Zanella2022-02-101-0/+4
| | | | | | | | | | | | | | | | | | | | | | The fix for BZ#22716 replacde LD_TRACE_LOADED_OBJECTS with LD_TRACE_PRELINKING so mtrace could record executable address position. To provide the same information, LD_TRACE_LOADED_OBJECTS is extended where a value or '2' also prints the executable address as well. It avoid adding another loader environment variable to be used solely for mtrace. The vDSO will be printed as a default library (with '=>' pointing the same name), which is ok since both mtrace and ldd already handles it. The mtrace script is changed to also parse the new format. To correctly support PIE and non-PIE executables, both the default mtrace address and the one calculated as used (it fixes mtrace for non-PIE exectuable as for BZ#22716 for PIE). Checked on x86_64-linux-gnu. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* elf: Remove prelink supportAdhemerval Zanella2022-02-101-1/+3
| | | | | | | | | | | | | Prelinked binaries and libraries still work, the dynamic tags DT_GNU_PRELINKED, DT_GNU_LIBLIST, DT_GNU_CONFLICT just ignored (meaning the process is reallocated as default). The loader environment variable TRACE_PRELINKING is also removed, since it used solely on prelink. Checked on x86_64-linux-gnu, i686-linux-gnu, and aarch64-linux-gnu. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* Open master branch for glibc 2.36 development glibc-2.35.9000Carlos O'Donell2022-02-031-0/+24
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* Update NEWS bug list.Carlos O'Donell2022-02-021-2/+134
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