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* configure: Use autoconf 2.71Siddhesh Poyarekar2023-07-172-109/+129
| | | | | | | | | | | | | | Bump autoconf requirement to 2.71 to allow regenerating configure on more recent distributions. autoconf 2.71 has been in Fedora since F36 and is the current version in Debian stable (bookworm). It appears to be current in Gentoo as well. All sysdeps configure and preconfigure scripts have also been regenerated; all changes are trivial transformations that do not affect functionality. Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org> Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* sysdeps/s390: Exclude fortified routines from being built with _FORTIFY_SOURCEFrédéric Bérat2023-07-101-0/+20
| | | | | | | | Depending on build configuration, the [routine]-c.c files may be chosen to provide fortified routines implementation. While [routines].c implementation were automatically excluded, the [routines]-c.c ones were not. This patch fixes that by adding these file to the list to be filtered.
* Fix misspellings in sysdeps/ -- BZ 25337Paul Pluzhnikov2023-05-3025-43/+43
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* S390: Use compile-only instead of also link-tests in configure.Stefan Liebler2023-05-222-177/+109
| | | | | | | | | | | | | | | | | Some of the s390-specific configure checks are using compile and link configure tests. Now use only compile tests as the link tests fails when e.g. bootstrapping a cross-toolchain due to missing crt-files/libc.so. This is achieved by using AC_COMPILE_IFELSE in configure.ac file. This is observable e.g. when using buildroot which builds glibc only once or the build-many-glibcs.py script. Note that the latter one is building glibc twice in the compilers-step (configure-checks fails) and in the glibcs-step (configure-checks succeed). Note, that the s390 specific configure tests for static PIE have to link an executable to test binutils support. Thus we can't fix those tests.
* Remove --enable-tunables configure optionAdhemerval Zanella Netto2023-03-291-10/+4
| | | | | | | | | | | | And make always supported. The configure option was added on glibc 2.25 and some features require it (such as hwcap mask, huge pages support, and lock elisition tuning). It also simplifies the build permutations. Changes from v1: * Remove glibc.rtld.dynamic_sort changes, it is orthogonal and needs more discussion. * Cleanup more code. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* S390: Fix _FPU_SETCW/GETCW when compiling with Clang [BZ #30130]Andreas Arnez2023-02-281-2/+2
| | | | | | | | The _FPU_SETCW and _FPU_GETCW macros are defined with inline assemblies. They use the sfpc and efpc instructions, respectively. But both contain a spurious second operand that leads to a compile error with Clang. Removing this operand works both with gcc/gas (since binutils 2.18) as well as with clang/llvm.
* s390x: Regenerate ULPs.Stefan Liebler2023-02-281-0/+1
| | | | | | | | | Needed due to recent commits: - "added pair of inputs for hypotf in binary32" commit ID cf7ffdd8a5f6da55397e10b3860062944312824c - "update auto-libm-test-out-hypot" commit ID 3efbf11fdf15ed991d2c41743921c524a867e145
* s390: Fix build for -march=z13Adhemerval Zanella2023-02-202-0/+2
| | | | | | | | It fixes the build after 7ea510127e2067e and 22999b2f0fb62. Checked with build for s390x-linux-gnu with -march=z13. Reviewed-by: Arjun Shankar <arjun@redhat.com>
* string: Remove string_private.hAdhemerval Zanella2023-02-171-20/+0
| | | | | | Now that _STRING_ARCH_unaligned is not used anymore. Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
* iconv: Remove _STRING_ARCH_unaligned usage for get/set macrosAdhemerval Zanella2023-02-173-4/+4
| | | | | | | | | And use a packed structure instead. The compiler generates optimized unaligned code if the architecture supports it. Checked on x86_64-linux-gnu and i686-linux-gnu. Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
* Fix ifunc-impl-list.c build for s390Joseph Myers2023-02-171-1/+1
| | | | | | | | | | | | | | | | | | | | | | Builds for s390 recently started failing with: ../sysdeps/s390/multiarch/ifunc-impl-list.c: In function '__libc_ifunc_impl_list': ../sysdeps/s390/multiarch/ifunc-impl-list.c:83:21: error: unused variable 'dl_hwcap' [-Werror=unused-variable] 83 | unsigned long int dl_hwcap = features->hwcap; | ^~~~~~~~ https://sourceware.org/pipermail/libc-testresults/2023q1/010855.html Add __attribute__ ((unused)) as already done for another variable there. Tested with build-many-glibcs.py (compilers and glibcs) for s390x-linux-gnu and s390-linux-gnu. Note: s390x-linux-gnu-O3 started failing with a different error earlier; that problem may still need to be fixed after this fix is in. https://sourceware.org/pipermail/libc-testresults/2023q1/010829.html
* string: Add libc_hidden_proto for memrchrAdhemerval Zanella2023-02-082-3/+9
| | | | | | | Although static linker can optimize it to local call, it follows the internal scheme to provide hidden proto and definitions. Reviewed-by: Carlos Eduardo Seo <carlos.seo@linaro.org>
* string: Add libc_hidden_proto for strchrnulAdhemerval Zanella2023-02-082-4/+8
| | | | | | | Although static linker can optimize it to local call, it follows the internal scheme to provide hidden proto and definitions. Reviewed-by: Carlos Eduardo Seo <carlos.seo@linaro.org>
* S390: Influence hwcaps/stfle via GLIBC_TUNABLES.Stefan Liebler2023-02-0710-41/+411
| | | | | | | | | | | | | | | | | | | | | | | | | | | This patch enables the option to influence hwcaps and stfle bits used by the s390 specific ifunc-resolvers. The currently x86-specific tunable glibc.cpu.hwcaps is also used on s390x to achieve the task. In addition the user can also set a CPU arch-level like z13 instead of single HWCAP and STFLE features. Note that the tunable only handles the features which are really used in the IFUNC-resolvers. All others are ignored as the values are only used inside glibc. Thus we can influence: - HWCAP_S390_VXRS (z13) - HWCAP_S390_VXRS_EXT (z14) - HWCAP_S390_VXRS_EXT2 (z15) - STFLE_MIE3 (z15) The influenced hwcap/stfle-bits are stored in the s390-specific cpu_features struct which also contains reserved fields for future usage. The ifunc-resolvers and users of stfle bits are adjusted to use the information from cpu_features struct. On 31bit, the ELF_MACHINE_IRELATIVE macro is now also defined. Otherwise the new ifunc-resolvers segfaults as they depend on the not yet processed_rtld_global_ro@GLIBC_PRIVATE relocation.
* string: Improve generic strnlen with memchrAdhemerval Zanella2023-02-061-6/+8
| | | | | | | | It also cleanups the multiple inclusion by leaving the ifunc implementation to undef the weak_alias and libc_hidden_def. Co-authored-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
* string: Improve generic strchrAdhemerval Zanella2023-02-061-5/+6
| | | | | | | | | | | | New algorithm now calls strchrnul. Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc-linux-gnu, and powerpc64-linux-gnu by removing the arch-specific assembly implementation and disabling multi-arch (it covers both LE and BE for 64 and 32 bits). Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
* string: Improve generic strchrnulAdhemerval Zanella2023-02-061-2/+0
| | | | | | | | | | | | | | | | | New algorithm read the first aligned address and mask off the unwanted bytes (this strategy is similar to arch-specific implementations used on powerpc, sparc, and sh). The loop now read word-aligned address and check using the has_zero_eq function. Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc64-linux-gnu, and powerpc-linux-gnu by removing the arch-specific assembly implementation and disabling multi-arch (it covers both LE and BE for 64 and 32 bits). Co-authored-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
* string: Improve generic strlenAdhemerval Zanella2023-02-061-4/+6
| | | | | | | | | | | | | | | | | New algorithm read the first aligned address and mask off the unwanted bytes (this strategy is similar to arch-specific implementations used on powerpc, sparc, and sh). The loop now read word-aligned address and check using the has_zero macro. Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc-linux-gnu, and powercp64-linux-gnu by removing the arch-specific assembly implementation and disabling multi-arch (it covers both LE and BE for 64 and 32 bits). Co-authored-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
* Update copyright dates with scripts/update-copyrightsJoseph Myers2023-01-06303-303/+303
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* elf: Introduce <dl-call_tls_init_tp.h> and call_tls_init_tp (bug 29249)Florian Weimer2022-11-031-1/+1
| | | | | | | | This makes it more likely that the compiler can compute the strlen argument in _startup_fatal at compile time, which is required to avoid a dependency on strlen this early during process startup. Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
* Use PTR_MANGLE and PTR_DEMANGLE unconditionally in C sourcesFlorian Weimer2022-10-183-2/+10
| | | | | | | | | | | | | | | | | In the future, this will result in a compilation failure if the macros are unexpectedly undefined (due to header inclusion ordering or header inclusion missing altogether). Assembler sources are more difficult to convert. In many cases, they are hand-optimized for the mangling and no-mangling variants, which is why they are not converted. sysdeps/s390/s390-32/__longjmp.c and sysdeps/s390/s390-64/__longjmp.c are special: These are C sources, but most of the implementation is in assembler, so the PTR_DEMANGLE macro has to be undefined in some cases, to match the assembler style. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Introduce <pointer_guard.h>, extracted from <sysdep.h>Florian Weimer2022-10-185-0/+5
| | | | | | | | | | | | | | This allows us to define a generic no-op version of PTR_MANGLE and PTR_DEMANGLE. In the future, we can use PTR_MANGLE and PTR_DEMANGLE unconditionally in C sources, avoiding an unintended loss of hardening due to missing include files or unlucky header inclusion ordering. In i386 and x86_64, we can avoid a <tls.h> dependency in the C code by using the computed constant from <tcb-offsets.h>. <sysdep.h> no longer includes these definitions, so there is no cyclic dependency anymore when computing the <tcb-offsets.h> constants. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* elf: Remove -fno-tree-loop-distribute-patterns usage on dl-supportAdhemerval Zanella2022-10-101-0/+29
| | | | | | | | | | | | | | Besides the option being gcc specific, this approach is still fragile and not future proof since we do not know if this will be the only optimization option gcc will add that transforms loops to memset (or any libcall). This patch adds a new header, dl-symbol-redir-ifunc.h, that can b used to redirect the compiler generated libcalls to port the generic memset implementation if required. Checked on x86_64-linux-gnu and aarch64-linux-gnu. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* elf: Remove _dl_string_hwcapJavier Pello2022-10-061-14/+0
| | | | | | | | Removal of legacy hwcaps support from the dynamic loader left no users of _dl_string_hwcap. Signed-off-by: Javier Pello <devel@otheo.eu> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Use atomic_exchange_release/acquireWilco Dijkstra2022-09-261-1/+1
| | | | | | | Rename atomic_exchange_rel/acq to use atomic_exchange_release/acquire since these map to the standard C11 atomic builtins. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* s390: Move hwcaps/platform names out of _rtld_global_roFlorian Weimer2022-08-254-63/+43
| | | | | | | | | | | Changes to these arrays are often backported to stable releases, but additions to these arrays shift the offsets of the following _rltd_global_ro members, thus breaking the GLIBC_PRIVATE ABI. Obviously, this change is itself an internal ABI break, but at least it will avoid further ABI breaks going forward. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* S390: Fix werror=unused-variable in ifunc-impl-list.c.Stefan Liebler2022-08-181-1/+3
| | | | | | | | | | If the architecture level set is high enough, no IFUNCs are used at all and the variable i would be unused. Then the build fails with: ../sysdeps/s390/multiarch/ifunc-impl-list.c: In function ‘__libc_ifunc_impl_list’: ../sysdeps/s390/multiarch/ifunc-impl-list.c:76:10: error: unused variable ‘i’ [-Werror=unused-variable] 76 | size_t i = max; | ^ cc1: all warnings being treated as errors
* arc4random: simplify design for better safetyJason A. Donenfeld2022-07-273-624/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* s390x: Add optimized chacha20Adhemerval Zanella Netto2022-07-223-0/+624
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It adds vectorized ChaCha20 implementation based on libgcrypt cipher/chacha20-s390x.S. The final state register clearing is omitted. On a z15 it shows the following improvements (using formatted bench-arc4random data): GENERIC MB/s ----------------------------------------------- arc4random [single-thread] 198.92 arc4random_buf(16) [single-thread] 244.49 arc4random_buf(32) [single-thread] 282.73 arc4random_buf(48) [single-thread] 286.64 arc4random_buf(64) [single-thread] 320.06 arc4random_buf(80) [single-thread] 297.43 arc4random_buf(96) [single-thread] 310.96 arc4random_buf(112) [single-thread] 308.10 arc4random_buf(128) [single-thread] 309.90 ----------------------------------------------- VX. MB/s ----------------------------------------------- arc4random [single-thread] 430.26 arc4random_buf(16) [single-thread] 735.14 arc4random_buf(32) [single-thread] 1029.99 arc4random_buf(48) [single-thread] 1206.76 arc4random_buf(64) [single-thread] 1311.92 arc4random_buf(80) [single-thread] 1378.74 arc4random_buf(96) [single-thread] 1445.06 arc4random_buf(112) [single-thread] 1484.32 arc4random_buf(128) [single-thread] 1517.30 ----------------------------------------------- Checked on s390x-linux-gnu.
* s390: use LC_ALL=C for readelf callSam James2022-06-212-2/+2
| | | | | | | | | | Let's use LC_ALL=C as we do elsewhere for consistency. Tested on s390x-ibm-linux-gnu. See: 72bd208846535725ea28b8173e79ef60e57a968c Signed-off-by: Sam James <sam@gentoo.org> Reviewed-by: Stefan Liebler <stli@linux.ibm.com>
* s390: use $READELFSam James2022-06-212-2/+2
| | | | | | | | | | We already check for it in root configure.ac with AC_CHECK_TOOL. Let's use the result. Tested on s390x-ibm-linux-gnu. Signed-off-by: Sam James <sam@gentoo.org> Reviewed-by: Stefan Liebler <stli@linux.ibm.com>
* Add bounds check to __libc_ifunc_impl_listWilco Dijkstra2022-06-101-7/+2
| | | | | | | | | | | | Add a proper bounds check to __libc_ifunc_impl_list. This makes MAX_IFUNC redundant and fixes several targets that will write outside the array. To avoid unnecessary large diffs, pass the maximum in the argument 'i' to IFUNC_IMPL_ADD - 'max' can be used in new ifunc definitions and existing ones can be updated if desired. Passes buildmanyglibc. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* s390: Remove _dl_skip_args usageAdhemerval Zanella2022-05-302-62/+0
| | | | | | | | | | Since ad43cac44a the generic code already shuffles the argv/envp/auxv on the stack to remove the ld.so own arguments and thus _dl_skip_args is always 0. So there is no need to adjust the argc or argv. Checked on s390x-linux-gnu and s390-linux-gnu. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* S390: Enable static PIEStefan Liebler2022-05-183-0/+242
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This commit enables static PIE on 64bit. On 31bit, static PIE is not supported. A new configure check in sysdeps/s390/s390-64/configure.ac also performs a minimal test for requirements in ld: Ensure you also have those patches for: - binutils (ld) - "[PR ld/22263] s390: Avoid dynamic TLS relocs in PIE" https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=26b1426577b5dcb32d149c64cca3e603b81948a9 (Tested by configure check above) Otherwise there will be a R_390_TLS_TPOFF relocation, which fails to be processed in _dl_relocate_static_pie() as static TLS map is not setup. - "s390: Add DT_JMPREL pointing to .rela.[i]plt with static-pie" https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=d942d8db12adf4c9e5c7d9ed6496a779ece7149e (We can't test it in configure as we are not able to link a static PIE executable if the system glibc lacks static PIE support) Otherwise there won't be DT_JMPREL, DT_PLTRELA, DT_PLTRELASZ entries and the IFUNC symbols are not processed, which leads to crashes. - kernel (the mentioned links to the commits belong to 5.19 merge window): - "s390/mmap: increase stack/mmap gap to 128MB" https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git/commit/?h=features&id=f2f47d0ef72c30622e62471903ea19446ea79ee2 - "s390/vdso: move vdso mapping to its own function" https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git/commit/?h=features&id=57761da4dc5cd60bed2c81ba0edb7495c3c740b8 - "s390/vdso: map vdso above stack" https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git/commit/?h=features&id=9e37a2e8546f9e48ea76c839116fa5174d14e033 - "s390/vdso: add vdso randomization" https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git/commit/?h=features&id=41cd81abafdc4e58a93fcb677712a76885e3ca25 (We can't test the kernel of the target system) Otherwise if /proc/sys/kernel/randomize_va_space is turned off (0), static PIE executables like ldconfig will crash. While startup sbrk is used to enlarge the HEAP. Unfortunately the underlying brk syscall fails as there is not enough space after the HEAP. Then the address of the TLS image is invalid and the following memcpy in __libc_setup_tls() leads to a segfault. If /proc/sys/kernel/randomize_va_space is activated (default: 2), there is enough space after HEAP. - glibc - "Linux: Define MMAP_CALL_INTERNAL" https://sourceware.org/git/?p=glibc.git;a=commit;h=c1b68685d438373efe64e5f076f4215723004dfb - "i386: Remove OPTIMIZE_FOR_GCC_5 from Linux libc-do-syscall.S" https://sourceware.org/git/?p=glibc.git;a=commit;h=6e5c7a1e262961adb52443ab91bd2c9b72316402 - "i386: Honor I386_USE_SYSENTER for 6-argument Linux system calls" https://sourceware.org/git/?p=glibc.git;a=commit;h=60f0f2130d30cfd008ca39743027f1e200592dff - "ia64: Always define IA64_USE_NEW_STUB as a flag macro" https://sourceware.org/git/?p=glibc.git;a=commit;h=18bd9c3d3b1b6a9182698c85354578d1d58e9d64 - "Linux: Implement a useful version of _startup_fatal" https://sourceware.org/git/?p=glibc.git;a=commit;h=a2a6bce7d7e52c1c34369a7da62c501cc350bc31 - "Linux: Introduce __brk_call for invoking the brk system call" https://sourceware.org/git/?p=glibc.git;a=commit;h=b57ab258c1140bc45464b4b9908713e3e0ee35aa - "csu: Implement and use _dl_early_allocate during static startup" https://sourceware.org/git/?p=glibc.git;a=commit;h=f787e138aa0bf677bf74fa2a08595c446292f3d7 The mentioned patch series by Florian Weimer avoids the mentioned failing sbrk syscall by falling back to mmap. This commit also adjusts startup code in start.S to be ready for static PIE. We have to add a wrapper function for main as we are not allowed to use GOT relocations before __libc_start_main is called. (Compare also to: - commit 14d886edbd3d80b771e1c42fbd9217f9074de9c6 "aarch64: fix start code for static pie" - commit 3d1d79283e6de4f7c434cb67fb53a4fd28359669 "aarch64: fix static pie enabled libc when main is in a shared library" )
* rtld: Remove DL_ARGV_NOT_RELRO and make _dl_skip_args constSzabolcs Nagy2022-05-171-23/+0
| | | | | | | | | | | _dl_skip_args is always 0, so the target specific code that modifies argv after relro protection is applied is no longer used. After the patch relro protection is applied to _dl_argv consistently on all targets. Reviewed-by: Florian Weimer <fweimer@redhat.com> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* elf: Replace PI_STATIC_AND_HIDDEN with opposite HIDDEN_VAR_NEEDS_DYNAMIC_RELOCFangrui Song2022-04-262-7/+0
| | | | | | | | | | | | | | | | | | PI_STATIC_AND_HIDDEN indicates whether accesses to internal linkage variables and hidden visibility variables in a shared object (ld.so) need dynamic relocations (usually R_*_RELATIVE). PI (position independent) in the macro name is a misnomer: a code sequence using GOT is typically position-independent as well, but using dynamic relocations does not meet the requirement. Not defining PI_STATIC_AND_HIDDEN is legacy and we expect that all new ports will define PI_STATIC_AND_HIDDEN. Current ports defining PI_STATIC_AND_HIDDEN are more than the opposite. Change the configure default. No functional change. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* S390: Add new s390 platform z16.Stefan Liebler2022-04-146-10/+47
| | | | | | | | | | | | | | The new IBM z16 is added to platform string array. The macro _DL_PLATFORMS_COUNT is incremented. _dl_hwcaps_subdir is extended by "z16" if HWCAP_S390_VXRS_PDE2 is set. HWCAP_S390_NNPA is not tested in _dl_hwcaps_subdirs_active as those instructions may be replaced or removed in future. tst-glibc-hwcaps.c is extended in order to test z16 via new marker5. A fatal glibc error is dumped if glibc was build with architecture level set for z16, but run on an older machine. (See dl-hwcap-check.h)
* Remove -z combreloc and HAVE_Z_COMBRELOCFangrui Song2022-04-042-32/+4
| | | | | | | | | | | | | -z combreloc has been the default regadless of the architecture since binutils commit f4d733664aabd7bd78c82895e030ec9779a92809 (2002). The configure check added in commit fdde83499a05 (2001) has long been unneeded. We can therefore treat HAVE_Z_COMBRELOC as always 1 and delete dead code paths in dl-machine.h files (many were copied from commit a711b01d34ca and ee0cb67ec238). Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* s390: Remove bzero optimizationsAdhemerval Zanella2022-02-235-103/+2
| | | | | The symbol is not present in current POSIX specification and compiler already generates memset call.
* elf: Remove prelink supportAdhemerval Zanella2022-02-102-28/+16
| | | | | | | | | | | | | 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>
* s390x: Use <gcc-macros.h> in early HWCAP checkFlorian Weimer2022-01-141-2/+3
| | | | | | | | This is required so that the checks still work if $(early-cflags) selects a different ISA level. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* Update copyright dates with scripts/update-copyrightsPaul Eggert2022-01-01303-303/+303
| | | | | | | | | | | | | | | | | | | | | | | I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
* malloc: Remove memusage.hAdhemerval Zanella2021-12-281-20/+0
| | | | | | And use machine-sp.h instead. The Linux implementation is based on already provided CURRENT_STACK_FRAME (used on nptl code) and STACK_GROWS_UPWARD is replaced with _STACK_GROWS_UP.
* Remove atomic-machine.h atomic typedefsAdhemerval Zanella2021-12-281-27/+0
| | | | Now that memusage.c uses generic types we can remove them.
* elf: Add _dl_audit_pltexitAdhemerval Zanella2021-12-282-3/+3
| | | | | | | | | It consolidates the code required to call la_pltexit audit callback. Checked on x86_64-linux-gnu, i686-linux-gnu, and aarch64-linux-gnu. Reviewed-by: Florian Weimer <fweimer@redhat.com>
* Remove TLS_TCB_ALIGN and TLS_INIT_TCB_ALIGNFlorian Weimer2021-12-091-6/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | TLS_INIT_TCB_ALIGN is not actually used. TLS_TCB_ALIGN was likely introduced to support a configuration where the thread pointer has not the same alignment as THREAD_SELF. Only ia64 seems to use that, but for the stack/pointer guard, not for storing tcbhead_t. Some ports use TLS_TCB_OFFSET and TLS_PRE_TCB_SIZE to shift the thread pointer, potentially landing in a different residue class modulo the alignment, but the changes should not impact that. In general, given that TLS variables have their own alignment requirements, having different alignment for the (unshifted) thread pointer and struct pthread would potentially result in dynamic offsets, leading to more complexity. hppa had different values before: __alignof__ (tcbhead_t), which seems to be 4, and __alignof__ (struct pthread), which was 8 (old default) and is now 32. However, it defines THREAD_SELF as: /* Return the thread descriptor for the current thread. */ # define THREAD_SELF \ ({ struct pthread *__self; \ __self = __get_cr27(); \ __self - 1; \ }) So the thread pointer points after struct pthread (hence __self - 1), and they have to have the same alignment on hppa as well. Similarly, on ia64, the definitions were different. We have: # define TLS_PRE_TCB_SIZE \ (sizeof (struct pthread) \ + (PTHREAD_STRUCT_END_PADDING < 2 * sizeof (uintptr_t) \ ? ((2 * sizeof (uintptr_t) + __alignof__ (struct pthread) - 1) \ & ~(__alignof__ (struct pthread) - 1)) \ : 0)) # define THREAD_SELF \ ((struct pthread *) ((char *) __thread_self - TLS_PRE_TCB_SIZE)) And TLS_PRE_TCB_SIZE is a multiple of the struct pthread alignment (confirmed by the new _Static_assert in sysdeps/ia64/libc-tls.c). On m68k, we have a larger gap between tcbhead_t and struct pthread. But as far as I can tell, the port is fine with that. The definition of TCB_OFFSET is sufficient to handle the shifted TCB scenario. This fixes commit 23c77f60181eb549f11ec2f913b4270af29eee38 ("nptl: Increase default TCB alignment to 32"). Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
* nptl: Introduce <tcb-access.h> for THREAD_* accessorsFlorian Weimer2021-12-091-9/+1
| | | | | | | These are common between most architectures. Only the x86 targets are outliers. Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
* nptl: Increase default TCB alignment to 32Florian Weimer2021-12-031-3/+0
| | | | | | | | | | rseq support will use a 32-byte aligned field in struct pthread, so the whole struct needs to have at least that alignment. nptl/tst-tls3mod.c uses TCB_ALIGNMENT, therefore include <descr.h> to obtain the fallback definition. Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
* s390: Use long branches across object boundaries (jgh instead of jh)Florian Weimer2021-11-102-2/+2
| | | | | | | | | | Depending on the layout chosen by the linker, the 16-bit displacement of the jh instruction is insufficient to reach the target label. Analysis of the linker failure was carried out by Nick Clifton. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Reviewed-by: Stefan Liebler <stli@linux.ibm.com>
* String: Add hidden defs for __memcmpeq() to enable internal usageNoah Goldstein2021-10-262-0/+2
| | | | | | | | No bug. This commit adds hidden defs for all declarations of __memcmpeq. This enables usage of __memcmpeq without the PLT for usage internal to GLIBC.
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-11-11 21:24:18 +0000