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* elf: Issue audit la_objopen for vDSOAdhemerval Zanella2022-03-291-0/+2
| | | | | | | | | | | | | | | | | | | The vDSO is is listed in the link_map chain, but is never the subject of an la_objopen call. A new internal flag __RTLD_VDSO is added that acts as __RTLD_OPENEXEC to allocate the required 'struct auditstate' extra space for the 'struct link_map'. The return value from the callback is currently ignored, since there is no PLT call involved by glibc when using the vDSO, neither the vDSO are exported directly. Checked on x86_64-linux-gnu, i686-linux-gnu, and aarch64-linux-gnu. Reviewed-by: Florian Weimer <fweimer@redhat.com> (cherry picked from commit f0e23d34a7bdf6b90fba954ee741419171ac41b2) Resolved conflicts: elf/Makefile
* elf: Avoid unnecessary slowdown from profiling with audit (BZ#15533)Adhemerval Zanella2022-03-291-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | The rtld-audit interfaces introduces a slowdown due to enabling profiling instrumentation (as if LD_AUDIT implied LD_PROFILE). However, instrumenting is only necessary if one of audit libraries provides PLT callbacks (la_pltenter or la_pltexit symbols). Otherwise, the slowdown can be avoided. The following patch adjusts the logic that enables profiling to iterate over all audit modules and check if any of those provides a PLT hook. To keep la_symbind to work even without PLT callbacks, _dl_fixup now calls the audit callback if the modules implements it. Co-authored-by: Alexander Monakov <amonakov@ispras.ru> Checked on x86_64-linux-gnu, i686-linux-gnu, and aarch64-linux-gnu. Reviewed-by: Florian Weimer <fweimer@redhat.com> (cherry picked from commit 063f9ba220f434c7f30dd65c4cff17c0c458a7cf) Resolved conflicts: NEWS elf/Makefile
* Enable _FORTIFY_SOURCE=3 for gcc 12 and aboveSiddhesh Poyarekar2022-03-111-1/+3
| | | | | | | | | gcc 12 now has support for the __builtin_dynamic_object_size builtin. Adapt the macro checks to enable _FORTIFY_SOURCE=3 on gcc 12 and above. Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> (cherry picked from commit 86bf0feb0e3ec8e37872f72499d6ae33406561d7)
* Linux: Only generate 64 bit timestamps for 64 bit time_t recvmsg/recvmmsgAdhemerval Zanella2022-02-011-2/+8
| | | | | | | | | | | | | | | | | | | | | | | | | The timestamps created by __convert_scm_timestamps only make sense for 64 bit time_t programs, 32 bit time_t programs will ignore 64 bit time_t timestamps since SO_TIMESTAMP will be defined to old values (either by glibc or kernel headers). Worse, if the buffer is not suffice MSG_CTRUNC is set to indicate it (which breaks some programs [1]). This patch makes only 64 bit time_t recvmsg and recvmmsg to call __convert_scm_timestamps. Also, the assumption to called it is changed from __ASSUME_TIME64_SYSCALLS to __TIMESIZE != 64 since the setsockopt might be called by libraries built without __TIME_BITS=64. The MSG_CTRUNC is only set for the 64 bit symbols, it should happen only if 64 bit time_t programs run older kernels. Checked on x86_64-linux-gnu and i686-linux-gnu. [1] https://github.com/systemd/systemd/pull/20567 Reviewed-by: Florian Weimer <fweimer@redhat.com> (cherry picked from commit 948ce73b31fdb0860bcec4b8e62b14e88234f98a)
* socket: Add the __sockaddr_un_set functionFlorian Weimer2022-01-171-0/+12
| | | | | Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org> (cherry picked from commit e368b12f6c16b6888dda99ba641e999b9c9643c8)
* ld.so: Replace DL_RO_DYN_SECTION with dl_relocate_ld [BZ #28340]H.J. Lu2021-11-031-0/+3
| | | | | | | | | | | | | | | | | | We can't relocate entries in dynamic section if it is readonly: 1. Add a l_ld_readonly field to struct link_map to indicate if dynamic section is readonly and set it based on p_flags of PT_DYNAMIC segment. 2. Replace DL_RO_DYN_SECTION with dl_relocate_ld to decide if dynamic section should be relocated. 3. Remove DL_RO_DYN_TEMP_CNT. 4. Don't use a static dynamic section to make readonly dynamic section in vDSO writable. 5. Remove the temp argument from elf_get_dynamic_info. This fixes BZ #28340. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org> (cherry picked from commit b413280cfb16834450f66f554bc0d618bb513851)
* misc: Add __get_nprocs_schedAdhemerval Zanella2021-10-011-1/+6
| | | | | | | | | | | | This is an internal function meant to return the number of avaliable processor where the process can scheduled, different than the __get_nprocs which returns a the system available online CPU. The Linux implementation currently only calls __get_nprocs(), which in tuns calls sched_getaffinity. Reviewed-by: Florian Weimer <fweimer@redhat.com> (cherry picked from commit 11a02b035b464ab6813676adfd19c4a59c36d907)
* Prepare for glibc 2.34 release.Carlos O'Donell2021-08-011-1/+1
| | | | Update version.h, and include/features.h.
* xmalloc: Fix warnings with gcc analyzerSiddhesh Poyarekar2021-07-281-3/+6
| | | | | | | | | | Tell the compiler that xmalloc family of allocators always return non-NULL. xrealloc in locale/programs also always returns non-NULL, but that conflicts with default realloc behaviour and that of xrealloc in libsupport, so keep it as is for now and resolve the differences later. Reviewed-by: Florian Weimer <fweimer@redhat.com>
* Simplify __malloc_initializedSiddhesh Poyarekar2021-07-221-6/+0
| | | | | | | | | Now that mcheck no longer needs to check __malloc_initialized (and no other third party hook can since the symbol is not exported), make the variable boolean and static so that it is used strictly within malloc. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* mcheck: Wean away from malloc hooks [BZ #23489]Siddhesh Poyarekar2021-07-221-4/+0
| | | | | | | | | | | | | | | | | | | | | | | | Split the mcheck implementation into the debugging hooks and API so that the API can be replicated in libc and libc_malloc_debug.so. The libc APIs always result in failure. The mcheck implementation has also been moved entirely into libc_malloc_debug.so and with it, all of the hook initialization code can now be moved into the debug library. Now the initialization can be done independently of libc internals. With this patch, libc_malloc_debug.so can no longer be used with older libcs, which is not its goal anyway. tst-vfork3 breaks due to this since it spawns shell scripts, which in turn execute using the system glibc. Move the test to tests-container so that only the built glibc is used. This move also fixes bugs in the mcheck version of memalign and realloc, thus allowing removal of the tests from tests-mcheck exclusion list. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* Remove __morecore and __default_morecoreSiddhesh Poyarekar2021-07-221-3/+0
| | | | | | | | | | Make the __morecore and __default_morecore symbols compat-only and remove their declarations from the API. Also, include morecore.c directly into malloc.c; this should ideally get merged into malloc in a future cleanup. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* nss: Directly load nss_dns, without going through dlsym/dlopenFlorian Weimer2021-07-191-5/+8
| | | | | | | | | | | | | This partially fixes static-only NSS support (bug 27959): The dns module no longer needs dlopen. Support for disabling dlopen altogher remains to be added. This commit introduces module_load_builtin into nss/nss_module.c, which handles the common parts of loading the built-in nss_files and nss_dns modules. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* resolv: Move nss_dns into libcFlorian Weimer2021-07-191-0/+36
| | | | | | | No abilist updates are needed because the symbols were GLIBC_PRIVATE. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* resolv: Move res_queriesmatch to its own file and into libcFlorian Weimer2021-07-191-1/+2
| | | | | | | | | | And reformat it to GNU style. The treatment of this function matches res_nameinquery, for the reasons stated there. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* resolv: Move res_nameinquery to its own file and into libcFlorian Weimer2021-07-191-1/+2
| | | | | | | | | | | | And reformat to GNU style. This deprecated function is used in the implementation of the stub resolver (for now). Keep the public symbol in libresolv for now (so that no new symbol version is needed), and add a forwarder to libresolv. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* resolv: Move ns_samename into its own file, and into libcFlorian Weimer2021-07-191-1/+2
| | | | | | | | | | | | But only as an internal symbol, __libc_ns_samename. The libresolv ABI is preserved. This is because the function is deprecated, and it does not make sense to add new symbol versions for deprecated functions. Also reformat the implementation to GNU style. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* resolv: Move ns_makecanon into its own file, and into libcFlorian Weimer2021-07-191-1/+2
| | | | | | | | | | | | But only as an internal symbol, __libc_ns_makecanon. The libresolv ABI is preserved. This is because the function is deprecated, and it does not make sense to add new symbol versions for deprecated functions. Also reformat the implementation to GNU style. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* resolv: Move res_isourserver to its own file and reformat to GNU styleFlorian Weimer2021-07-191-2/+0
| | | | | Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* resolv: Rename res_comp.c to res-name-checking.c and move into libcFlorian Weimer2021-07-191-2/+4
| | | | | | | | | | | | | | | This reflects what the remaining functions in the file do. The __res_dnok, __res_hnok, __res_mailok, __res_ownok were moved with the script, using --no-new-version, and turned into compat symbols. __libc_res_dnok@@GLIBC_PRIVATE and __libc_res_hnok@@GLIBC_PRIVATE are added for internal use, to avoid accidentally binding to compatibility symbols. The new public symbols res_dnok, res_hnok, res_mailok, res_ownok were added using make update-all-abi. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* resolv: Move dn_skipname to its own file and into libcFlorian Weimer2021-07-191-1/+2
| | | | | | | | | | | | | | | And reformat it to GNU style. dn_skipname is used outside glibc, so do not deprecate it, and export it as dn_skipname (not __dn_skipname). Due to internal users, provide a __libc_dn_skipname alias, and keep __dn_skipname as a pure compatibility symbol. __dn_skipname@GLIBC_2.0 was moved using the script, and dn_skipname@@GLIBC_2.34 was added using make update-all-abi. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* resolv: Move dn_comp to its own file and into libcFlorian Weimer2021-07-191-1/+0
| | | | | | | | | | | | | | | And reformat it to GNU style. dn_comp is used in various programs, so keep it as a non-deprecated symbol. Switch to dn_comp (not __dn_comp) for the ABI name. There are no internal users, so interposition is not a problem. The __dn_comp symbol was moved with scripts/move-symbol-to-libc.py --no-new-version. dn_comp@@GLIBC_2.34 was added with make update-all-abi. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* resolv: Move dn_expand to its own file and into libcFlorian Weimer2021-07-191-1/+3
| | | | | | | | | | | | | | | | | | And reformat to GNU style. This switches back to the dn_expand name for the ABI symbol and turns __dn_expand into a compatibility symbol. With the improved namespace management in current glibc, it is no longer necessary to use a private namespace symbol. To avoid old code binding to a GLIBC_PRIVATE symbol by accident, use __libc_dn_expand for the internal symbol name. The symbols dn_expand, __dnexpand were moved using scripts/move-symbol-to-libc.py, followed by an adjustment to make dn_expand the only GLIBC_2.34 symbol. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* resolv: Move ns_name_compress into its own file and into libcFlorian Weimer2021-07-191-1/+2
| | | | | | | | | And reformat to GNU style. The symbol was moved using scripts/move-symbol-to-libc.py. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* resolv: Move ns_name_pack into its own file and into libcFlorian Weimer2021-07-191-1/+2
| | | | | | | | | And reformat to GNU style, and eliminate the labellen function. The symbol was moved using scripts/move-symbol-to-libc.py. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* resolv: Move ns_name_pton into its own file and into libcFlorian Weimer2021-07-191-1/+2
| | | | | | | | | And reformat to GNU style, and eliminate the digits variable. The symbol was moved using scripts/move-symbol-to-libc.py. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* resolv: Move ns_name_uncompress into its own file and into libcFlorian Weimer2021-07-191-1/+2
| | | | | | | | | | And reformat to GNU style. Check for negative error returns (instead of -1). The symbol was moved using scripts/move-symbol-to-libc.py. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* resolv: Move ns_name_skip to its own file and into libc (bug 28091)Florian Weimer2021-07-191-1/+2
| | | | | | | | | | And reformat to GNU style. Avoid out-of-bounds pointer arithmetic. This also results in a fix of bug 28091 due to the additional packet length checks. The symbol was moved using scripts/move-symbol-to-libc.py. Reviewed-by: Carlos O'Donell <carlos@systemhalted.org>
* resolv: Move ns_name_unpack to its own file and into libcFlorian Weimer2021-07-151-1/+2
| | | | | | | | | | Reformat to GNU style. Avoid out-of-bounds buffer arithmetic. Eliminate the labellen function. The symbol was moved using scripts/move-symbol-to-libc.py. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* resolv: Move ns_name_ntop to its own file and into libcFlorian Weimer2021-07-151-1/+3
| | | | | | | | | | | | Reformat to GNU style. Avoid out-of-bounds pointer arithmetic (e.g., use eom - dn < 2 instead of dn + 1 >= eom). Inline the labellen function and fold the compression pointer check into the length check (l >= 64). Assume ASCII encoding. The symbol was moved using scripts/move-symbol-to-libc.py. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* socket: Add hidden prototype for setsockoptFlorian Weimer2021-07-151-1/+2
| | | | | | Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* Add an internal wrapper for clone, clone2 and clone3H.J. Lu2021-07-141-0/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The clone3 system call (since Linux 5.3) provides a superset of the functionality of clone and clone2. It also provides a number of API improvements, including the ability to specify the size of the child's stack area which can be used by kernel to compute the shadow stack size when allocating the shadow stack. Add: extern int __clone_internal (struct clone_args *__cl_args, int (*__func) (void *__arg), void *__arg); to provide an abstract interface for clone, clone2 and clone3. 1. Simplify stack management for thread creation by passing both stack base and size to create_thread. 2. Consolidate clone vs clone2 differences into a single file. 3. Call __clone3 if HAVE_CLONE3_WAPPER is defined. If __clone3 returns -1 with ENOSYS, fall back to clone or clone2. 4. Use only __clone_internal to clone a thread. Since the stack size argument for create_thread is now unconditional, always pass stack size to create_thread. 5. Enable the public clone3 wrapper in the future after it has been added to all targets. NB: Sandbox will return ENOSYS on clone3 in both Chromium: The following revision refers to this bug: https://chromium.googlesource.com/chromium/src/+/218438259dd795456f0a48f67cbe5b4e520db88b commit 218438259dd795456f0a48f67cbe5b4e520db88b Author: Matthew Denton <mpdenton@chromium.org> Date: Thu Jun 03 20:06:13 2021 Linux sandbox: return ENOSYS for clone3 Because clone3 uses a pointer argument rather than a flags argument, we cannot examine the contents with seccomp, which is essential to preventing sandboxed processes from starting other processes. So, we won't be able to support clone3 in Chromium. This CL modifies the BPF policy to return ENOSYS for clone3 so glibc always uses the fallback to clone. Bug: 1213452 Change-Id: I7c7c585a319e0264eac5b1ebee1a45be2d782303 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2936184 Reviewed-by: Robert Sesek <rsesek@chromium.org> Commit-Queue: Matthew Denton <mpdenton@chromium.org> Cr-Commit-Position: refs/heads/master@{#888980} [modify] https://crrev.com/218438259dd795456f0a48f67cbe5b4e520db88b/sandbox/linux/seccomp-bpf-helpers/baseline_policy.cc and Firefox: https://hg.mozilla.org/integration/autoland/rev/ecb4011a0c76 Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Reduce <limits.h> pollution due to dynamic PTHREAD_STACK_MINFlorian Weimer2021-07-121-7/+0
| | | | | | | | | | | | | | | | | | | | <limits.h> used to be a header file with no declarations. GCC's libgomp includes it in a #pragma GCC visibility hidden block. Including <unistd.h> from <limits.h> (indirectly) declares everything in <unistd.h> with hidden visibility, resulting in linker failures. This commit avoids C declarations in assembler mode and only declares __sysconf in <limits.h> (and not the entire contents of <unistd.h>). The __sysconf symbol is already part of the ABI. PTHREAD_STACK_MIN is no longer defined for __USE_DYNAMIC_STACK_SIZE && __ASSEMBLER__ because there is no possible definition. Additionally, PTHREAD_STACK_MIN is now defined by <pthread.h> for __USE_MISC because this is what developers expect based on the macro name. It also helps to avoid libgomp linker failures in GCC because libgomp includes <pthread.h> before its visibility hacks. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* Define PTHREAD_STACK_MIN to sysconf(_SC_THREAD_STACK_MIN)H.J. Lu2021-07-092-9/+16
| | | | | | | | | | | | | The constant PTHREAD_STACK_MIN may be too small for some processors. Rename _SC_SIGSTKSZ_SOURCE to _DYNAMIC_STACK_SIZE_SOURCE. When _DYNAMIC_STACK_SIZE_SOURCE or _GNU_SOURCE are defined, define PTHREAD_STACK_MIN to sysconf(_SC_THREAD_STACK_MIN) which is changed to MIN (PTHREAD_STACK_MIN, sysconf(_SC_MINSIGSTKSZ)). Consolidate <bits/local_lim.h> with <bits/pthread_stack_min.h> to provide a constant target specific PTHREAD_STACK_MIN value. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* Force building with -fno-commonFlorian Weimer2021-07-091-5/+1
| | | | | | | | | | As a result, is not necessary to specify __attribute__ ((nocommon)) on individual definitions. GCC 10 defaults to -fno-common on all architectures except ARC, but this change is compatible with older GCC versions and ARC, too. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* posix: Add posix_spawn_file_actions_addclosefrom_npAdhemerval Zanella2021-07-081-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds a way to close a range of file descriptors on posix_spawn as a new file action. The API is similar to the one provided by Solaris 11 [1], where the file action causes the all open file descriptors greater than or equal to input on to be closed when the new process is spawned. The function posix_spawn_file_actions_addclosefrom_np is safe to be implemented by iterating over /proc/self/fd, since the Linux spawni.c helper process does not use CLONE_FILES, so its has own file descriptor table and any failure (in /proc operation) aborts the process creation and returns an error to the caller. I am aware that this file action might be redundant to the current approach of POSIX in promoting O_CLOEXEC in more interfaces. However O_CLOEXEC is still not the default and for some specific usages, the caller needs to close all possible file descriptors to avoid them leaking. Some examples are CPython (discussed in BZ#10353) and OpenJDK jspawnhelper [2] (where OpenJDK spawns a helper process to exactly closes all file descriptors). Most likely any environment which calls functions that might open file descriptor under the hood and aim to use posix_spawn might face the same requirement. Checked on x86_64-linux-gnu and i686-linux-gnu on kernel 5.11 and 4.15. [1] https://docs.oracle.com/cd/E36784_01/html/E36874/posix-spawn-file-actions-addclosefrom-np-3c.html [2] https://github.com/openjdk/jdk/blob/master/src/java.base/unix/native/libjava/childproc.c#L82
* io: Add closefrom [BZ #10353]Adhemerval Zanella2021-07-081-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The function closes all open file descriptors greater than or equal to input argument. Negative values are clamped to 0, i.e, it will close all file descriptors. As indicated by the bug report, this is a common symbol provided by different systems (Solaris, OpenBSD, NetBSD, FreeBSD) and, although its has inherent issues with not taking in consideration internal libc file descriptors (such as syslog), this is also a common feature used in multiple projects [1][2][3][4][5]. The Linux fallback implementation iterates over /proc and close all file descriptors sequentially. Although it was raised the questioning whether getdents on /proc/self/fd might return disjointed entries when file descriptor are closed; it does not seems the case on my testing on multiple kernel (v4.18, v5.4, v5.9) and the same strategy is used on different projects [1][2][3][5]. Also, the interface is set a fail-safe meaning that a failure in the fallback results in a process abort. Checked on x86_64-linux-gnu and i686-linux-gnu on kernel 5.11 and 4.15. [1] https://github.com/systemd/systemd/blob/5238e9575906297608ff802a27e2ff9effa3b338/src/basic/fd-util.c#L217 [2] https://github.com/lxc/lxc/blob/ddf4b77e11a4d08f09b7b9cd13e593f8c047edc5/src/lxc/start.c#L236 [3] https://github.com/python/cpython/blob/9e4f2f3a6b8ee995c365e86d976937c141d867f8/Modules/_posixsubprocess.c#L220 [4] https://github.com/rust-lang/rust/blob/5f47c0613ed4eb46fca3633c1297364c09e5e451/src/libstd/sys/unix/process2.rs#L303-L308 [5] https://github.com/openjdk/jdk/blob/master/src/java.base/unix/native/libjava/childproc.c#L82
* linux: Add close_rangeAdhemerval Zanella2021-07-081-0/+6
| | | | | | | | | | It was added on Linux 5.9 (278a5fbaed89) with CLOSE_RANGE_CLOEXEC added on 5.11 (582f1fb6b721f). Although FreeBSD has added the same syscall, this only adds the symbol on Linux ports. This syscall is required to provided a fail-safe way to implement the closefrom symbol (BZ #10353). Checked on x86_64-linux-gnu and i686-linux-gnu on kernel 5.11 and 4.15.
* nss: Access nss_files through direct referencesFlorian Weimer2021-07-071-0/+10
| | | | | | | | This partially fixes static-only NSS support (bug 27959): The files module no longer needs dlopen. Support for the dns module remains to be added, and also support for disabling dlopen altogether. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nss_files: Move into libcFlorian Weimer2021-07-073-29/+6
| | | | | | This is the first step towards fixing bug 27959. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nss_files: Add generic code for set*ent, end*ent and file openFlorian Weimer2021-07-071-0/+60
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This reduces RSS usage if nss_files is not actually used, and can be used later to make NSS data thread-specific. It also results in a small code size reduction. Before: text data bss dec hex filename 2288 0 72 2360 938 nss/files-alias.os 1807 0 72 1879 757 nss/files-ethers.os 1371 0 72 1443 5a3 nss/files-grp.os 6246 0 72 6318 18ae nss/files-hosts.os 869 0 0 869 365 nss/files-initgroups.os 666 0 0 666 29a nss/files-init.os 1934 0 0 1934 78e nss/files-netgrp.os 2353 0 72 2425 979 nss/files-network.os 2130 0 72 2202 89a nss/files-proto.os 1372 0 72 1444 5a4 nss/files-pwd.os 2124 0 72 2196 894 nss/files-rpc.os 2265 0 72 2337 921 nss/files-service.os 1125 0 72 1197 4ad nss/files-sgrp.os 1124 0 72 1196 4ac nss/files-spwd.os After: text data bss dec hex filename 2040 0 0 2040 7f8 nss/files-alias.os 1599 0 0 1599 63f nss/files-ethers.os 1155 0 0 1155 483 nss/files-grp.os 6010 0 0 6010 177a nss/files-hosts.os 869 0 0 869 365 nss/files-initgroups.os 666 0 0 666 29a nss/files-init.os 1934 0 0 1934 78e nss/files-netgrp.os 2129 0 0 2129 851 nss/files-network.os 1914 0 0 1914 77a nss/files-proto.os 1156 0 0 1156 484 nss/files-pwd.os 1908 0 0 1908 774 nss/files-rpc.os 2057 0 0 2057 809 nss/files-service.os 909 0 0 909 38d nss/files-sgrp.os 908 0 0 908 38c nss/files-spwd.os 1090 0 8 1098 44a nss/nss_files_data.os 27674 code bytes before, 26344 code bytes after, so it is an overall win despite the extra initialization code. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* libio: Replace internal _IO_getdelim symbol with __getdelimFlorian Weimer2021-07-071-0/+1
| | | | | | | __getdelim is exported, _IO_getdelim is not. Add a hidden prototype for __getdelim. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* libio: Add hidden prototype for ungetcFlorian Weimer2021-07-071-0/+1
| | | | | | And make ungetc the primary symbol, with _IO_ungetc as an alias. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* inet: Add hidden prototype for __inet_networkFlorian Weimer2021-07-071-0/+2
| | | | Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* elf: Clean up GLIBC_PRIVATE exports of internal libdl symbolsFlorian Weimer2021-07-071-16/+14
| | | | | | | | They are no longer needed after everything has been moved into libc. The _dl_vsym test has to be removed because the symbol cannot be used outside libc anymore. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* resolv: Move libanl into libc (if libpthread is in libc)Florian Weimer2021-07-021-0/+4
| | | | | | | | | | The symbols gai_cancel, gai_error, gai_suspend, getaddrinfo_a, __gai_suspend_time64 were moved using scripts/move-symbol-to-libc.py. For Hurd (which remains !PTHREAD_IN_LIBC), a few #define redirects had to be added because several pthread functions are not available under __. (Linux uses __ prefixes for most hidden aliases, and has to in some cases to avoid linknamespace issues.)
* Fix extra PLT reference in libc.so due to __glob64_time64 if build with gcc ↵Stefan Liebler2021-07-011-0/+1
| | | | | | | | | | | | | | | | 7.5 on 32bit. Starting with recent commit 84f7ce84474c1648ce96884f1c91ca7b97ca3fc2 "posix: Add glob64 with 64-bit time_t support", elf/check-localplt fails due to extra PLT reference __glob64_time64 in __glob64_time64 itself. This is observable with gcc 7.5 on x86_64 with -m32 or s390x with -m31. E.g. if build with gcc 10, gcc is generating a call to __glob64_time64.localalias. This patch is adding a hidden version of __glob64_time64 in the same way as for __globfree64_time64.
* login: Move libutil into libcFlorian Weimer2021-06-302-2/+6
| | | | | | | | | | | | | | | | The symbols forkpty, login, login_tty, logout, logwtmp, openpty were moved using scripts/move-symbol-to-libc.py. This is a single commit because most of the symbols are tied together via forkpty, for example. Several changes to use hidden prototypes are needed. This commit also updates pseudoterminal terminology on modified lines. For 390 (31-bit), this commit follows the existing style for the compat symbol version creation. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* login: Rework hidden prototypes for __setutent, __utmpname, __endutentFlorian Weimer2021-06-301-3/+6
| | | | | | | Replace attribute_hidden with a regular combination of libc_hidden_proto and libc_hidden_def. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* login: Hidden prototypes for _getpt, __ptsname_r, grantpt, unlockptFlorian Weimer2021-06-301-0/+6
| | | | Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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