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* Update mallinfo2 ABI, and testDJ Delorie2020-09-172-0/+2
| | | | | | | This patch adds the ABI-related bits to reflect the new mallinfo2 function, and adds a test case to verify basic functionality. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Allow memset local PLT reference for RISC-V.Alistair Francis2020-09-171-0/+1
| | | | | | | | | | | | | | | | This is similar to commit a26e2e9feab87d4f745c31411458b048742ac733 "Allow memset local PLT reference for powerpc soft-float.". GCC 10.1 results in the localplt test failing for RISC-V. From the original commit for power-pc: Since memset is documented as a function GCC may always implicitly generate calls to, it seems reasonable to allow that local PLT reference (just like those for libgcc functions that GCC implicitly generates calls to and that are also exported from libc.so), which this patch does. Acked-by: Palmer Dabbelt <palmerdabbelt@google.com>
* RISC-V: Build infrastructure for 32-bit portZong Li2020-08-275-5/+63
| | | | | | | | This patch lays out the top-level organisation of the RISC-V 32-bit port. It provides all the Implies files as well as various other fragments of the build infrastructure. Reviewed-by: Maciej W. Rozycki <macro@wdc.com>
* RISC-V: Add rv32 path to RTLDLIST in lddZong Li2020-08-271-1/+1
| | | | Reviewed-by: Maciej W. Rozycki <macro@wdc.com>
* riscv32: Specify the arch_minimum_kernel as 5.4Alistair Francis2020-08-272-0/+8
| | | | | | | | | | Specify the minimum kernel version for RISC-V 32-bit as the 5.4 kernel. We require this commit: "waitid: Add support for waiting for the current process group" for the kernel as it adds support for the P_PGID id for the waitid syscall. Without this patch we can't replace the wait4 syscall on 64-bit time_t only systems. Reviewed-by: Maciej W. Rozycki <macro@wdc.com>
* RISC-V: Add 32-bit ABI listsAlistair Francis2020-08-2713-0/+3336
| | | | | | Use the update-abi Make target to generate the abilist for RV32. Reviewed-by: Maciej W. Rozycki <macro@wdc.com>
* RISC-V: Support the 32-bit ABI implementationAlistair Francis2020-08-271-0/+55
| | | | | | | This patch adds the ABI implementation for 32-bit RISC-V. It contains the Linux-specific and RISC-V architecture code. Reviewed-by: Maciej W. Rozycki <macro@wdc.com>
* RISC-V: Add arch-syscall.h for RV32Alistair Francis2020-08-271-0/+284
| | | | Reviewed-by: Maciej W. Rozycki <macro@wdc.com>
* RISC-V: Add path of library directories for the 32-bitAlistair Francis2020-08-271-16/+38
| | | | | | | | | | | | | | | | | With RV32 support the list of possible RISC-V system directories increases to: - /lib64/lp64d - /lib64/lp64 - /lib32/ilp32d - /lib32/ilp32 - /lib (only ld.so) This patch changes the add_system_dir () macro to support the new ilp32d and ilp32 directories for RV32. While refactoring this code let's split out the confusing if statements into a loop to make it easier to understand and extend. Reviewed-by: Maciej W. Rozycki <macro@wdc.com>
* RISC-V: Support dynamic loader for the 32-bitZong Li2020-08-271-1/+1
| | | | | | Add the LD_SO_ABI definition for RISC-V 32-bit. Reviewed-by: Maciej W. Rozycki <macro@wdc.com>
* RISC-V: Add support for 32-bit vDSO callsAlistair Francis2020-08-271-6/+17
| | | | Reviewed-by: Maciej W. Rozycki <macro@wdc.com>
* RISC-V: Use 64-bit-time syscall numbers with the 32-bit portAlistair Francis2020-08-271-0/+23
| | | | | | | | | | | | | | | | | | | sysdep.h redefines only the syscall where the generic implementation still does not have actual 64-bit time_t support: /* Workarounds for generic code needing to handle 64-bit time_t. */ /* Fix sysdeps/unix/sysv/linux/clock_getcpuclockid.c. */ #define __NR_clock_getres __NR_clock_getres_time64 /* Fix sysdeps/nptl/lowlevellock-futex.h. */ #define __NR_futex __NR_futex_time64 [...] This patch also adds a comment that it is a workaround to handle 64-bit time_t and on each #define comment for which implementation it intends to. Reviewed-by: Maciej W. Rozycki <macro@wdc.com>
* RISC-V: Cleanup some of the sysdep.h codeAlistair Francis2020-08-271-13/+4
| | | | | | | | Remove a duplicate inclusion of <sysdeps/unix/sysdep.h> which is already pulled via <sysdeps/unix/sysv/linux/generic/sysdep.h>, and the inclusion of <errno.h> whose definition of `__set_errno' is not needed here. Reviewed-by: Maciej W. Rozycki <macro@wdc.com>
* RISC-V: Use 64-bit time_t and off_t for RV32 and RV64Alistair Francis2020-08-274-0/+162
| | | | | | | | | | | | | | | | | | | | | | Using the original glibc headers under bits/ let's make small modifications to use 64-bit time_t and off_t for both RV32 and RV64. For the typesizes.h, here are justifications for the changes from the generic version (based on Arnd's very helpful feedback): - All the !__USE_FILE_OFFSET64 types (__off_t, __ino_t, __rlim_t, ...) are changed to match the 64-bit replacements. - __time_t is defined to 64 bit, but no __time64_t is added. This makes sense as we don't have the time64 support for other 32-bit architectures yet, and it will be easy to change when that happens. - __suseconds_t is 64-bit. This matches what we use the kernel ABI for the few drivers that are relying on 'struct timeval' input arguments in ioctl, as well as the adjtimex system call. It means that timeval has to be defined without the padding, unlike timespec, which needs padding. Reviewed-by: Maciej W. Rozycki <macro@wdc.com>
* Update syscall lists for Linux 5.8.Joseph Myers2020-08-071-0/+1
| | | | | | | | Linux 5.8 has one new syscall, faccessat2. Update syscall-names.list and regenerate the arch-syscall.h headers with build-many-glibcs.py update-syscalls. Tested with build-many-glibcs.py.
* Linux: Remove rseq supportFlorian Weimer2020-07-161-1/+0
| | | | | | | | | | | | | | | | | | The kernel ABI is not finalized, and there are now various proposals to change the size of struct rseq, which would make the glibc ABI dependent on the version of the kernels used for building glibc. This is of course not acceptable. This reverts commit 48699da1c468543ade14777819bd1b4d652709de ("elf: Support at least 32-byte alignment in static dlopen"), commit 8f4632deb3545b2949cec5454afc3cb21a0024ea ("Linux: rseq registration tests"), commit 6e29cb3f61ff5432c78a1c84b0d9b123a350ab36 ("Linux: Use rseq in sched_getcpu if available"), and commit 0c76fc3c2b346dc5401dc055d97d4279632b0fb3 ("Linux: Perform rseq registration at C startup and thread creation"), resolving the conflicts introduced by the ARC port and the TLS static surplus changes. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* string: Add strerrorname_np and strerrordesc_npAdhemerval Zanella2020-07-071-0/+2
| | | | | | | | | | | | | | | | | The strerrorname_np returns error number name (e.g. "EINVAL" for EINVAL) while strerrordesc_np returns string describing error number (e.g "Invalid argument" for EINVAL). Different than strerror, strerrordesc_np does not attempt to translate the return description, both functions return NULL for an invalid error number. They should be used instead of sys_errlist and sys_nerr, both are thread and async-signal safe. These functions are GNU extensions. Checked on x86-64-linux-gnu, i686-linux-gnu, powerpc64le-linux-gnu, and s390x-linux-gnu. Tested-by: Carlos O'Donell <carlos@redhat.com> Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* string: Add sigabbrev_np and sigdescr_npAdhemerval Zanella2020-07-071-0/+2
| | | | | | | | | | | | | | | | | | The sigabbrev_np returns the abbreviated signal name (e.g. "HUP" for SIGHUP) while sigdescr_np returns the string describing the error number (e.g "Hangup" for SIGHUP). Different than strsignal, sigdescr_np does not attempt to translate the return description and both functions return NULL for an invalid signal number. They should be used instead of sys_siglist or sys_sigabbrev and they are both thread and async-signal safe. They are added as GNU extensions on string.h header (same as strsignal). Checked on x86-64-linux-gnu, i686-linux-gnu, powerpc64le-linux-gnu, and s390x-linux-gnu. Tested-by: Carlos O'Donell <carlos@redhat.com> Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* Add the __libc_single_threaded variableFlorian Weimer2020-07-061-0/+1
| | | | | | | | | | | | | | The variable is placed in libc.so, and it can be true only in an outer libc, not libcs loaded via dlmopen or static dlopen. Since thread creation from inner namespaces does not work, pthread_create can update __libc_single_threaded directly. Using __libc_early_init and its initial flag, implementation of this variable is very straightforward. A future version may reset the flag during fork (but not in an inner namespace), or after joining all threads except one. Reviewed-by: DJ Delorie <dj@redhat.com>
* Linux: Perform rseq registration at C startup and thread creationMathieu Desnoyers2020-07-061-0/+1
| | | | | | | | | | | | | | | | | | | Register rseq TLS for each thread (including main), and unregister for each thread (excluding main). "rseq" stands for Restartable Sequences. See the rseq(2) man page proposed here: https://lkml.org/lkml/2018/9/19/647 Those are based on glibc master branch commit 3ee1e0ec5c. The rseq system call was merged into Linux 4.18. The TLS_STATIC_SURPLUS define is increased to leave additional room for dlopen'd initial-exec TLS, which keeps elf/tst-auditmany working. The increase (76 bytes) is larger than 32 bytes because it has not been increased in quite a while. The cost in terms of additional TLS storage is quite significant, but it will also obscure some initial-exec-related dlopen failures.
* nptl: Add pthread_attr_setsigmask_np, pthread_attr_getsigmask_npFlorian Weimer2020-06-021-0/+2
| | | | | Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* nptl: Move pthread_gettattr_np into libcFlorian Weimer2020-05-202-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> Use __getline instead of __getdelim to avoid a localplt failure. Likewise for __getrlimit/getrlimit. The abilist updates were performed by: git ls-files 'sysdeps/unix/sysv/linux/**/libc.abilist' \ | while read x ; do echo "GLIBC_2.32 pthread_getattr_np F" >> $x done python3 scripts/move-symbol-to-libc.py --only-linux pthread_getattr_np The private export of __pthread_getaffinity_np is no longer needed, but the hidden alias still necessary so that the symbol can be exported with versioned_symbol. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* nptl: Move pthread_getaffinity_np into libcFlorian Weimer2020-05-202-1/+2
| | | | | | | | | | | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> The abilist updates were performed by: git ls-files 'sysdeps/unix/sysv/linux/**/libc.abilist' \ | while read x ; do echo "GLIBC_2.32 pthread_getaffinity_np F" >> $x done python3 scripts/move-symbol-to-libc.py pthread_getaffinity_np Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* nptl: Move pthread_attr_setaffinity_np into libcFlorian Weimer2020-05-202-1/+2
| | | | | | | | | | | | | | | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> The symbol did not previously exist in libc, so a new GLIBC_2.32 symbol is needed, to get correct dependency for binaries which use the symbol but no longer link against libpthread. The abilist updates were performed by: git ls-files 'sysdeps/unix/sysv/linux/**/libc.abilist' \ | while read x ; do echo "GLIBC_2.32 pthread_attr_setaffinity_np F" >> $x done python3 scripts/move-symbol-to-libc.py pthread_attr_setaffinity_np Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* nptl: Move pthread_sigmask implementation to libcAdhemerval Zanella2020-04-212-1/+2
| | | | | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> A new symbol version is added on libc to force loading failure instead of lazy binding one for newly binaries with old loaders. Checked with a build against all affected ABIs.
* Update syscall lists for Linux 5.6.Joseph Myers2020-04-031-0/+2
| | | | | | | Linux 5.6 has new openat2 and pidfd_getfd syscalls. This patch adds them to syscall-names.list and regenerates the arch-syscall.h files. Tested with build-many-glibcs.py.
* nptl: Move pthread_setschedparam implementation into libcFlorian Weimer2020-02-201-1/+0
| | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Move pthread_getschedparam implementation into libcFlorian Weimer2020-02-201-1/+0
| | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Move pthread_cond_init implementation into libcFlorian Weimer2020-02-201-1/+0
| | | | | | | | | | | It is necessary to export __pthread_cond_init from libc because the C11 condition variable needs it and is still left in libpthread. This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Move pthread_cond_destroy implementation into libcFlorian Weimer2020-02-201-1/+0
| | | | | | | | | | | It is necessary to export __pthread_cond_destroy from libc because the C11 condition variable needs it and is still left in libpthread. This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Move pthread_condattr_init implementation into libcFlorian Weimer2020-02-201-1/+0
| | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Move pthread_condattr_destroy implementation into libcFlorian Weimer2020-02-201-1/+0
| | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Move pthread_attr_setscope implementation into libcFlorian Weimer2020-02-201-1/+0
| | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Move pthread_attr_getscope implementation into libcFlorian Weimer2020-02-201-1/+0
| | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Move pthread_attr_setschedpolicy implementation into libcFlorian Weimer2020-02-201-1/+0
| | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Move pthread_attr_getschedpolicy implementation into libcFlorian Weimer2020-02-201-1/+0
| | | | | | | | This is part of the libpthread removal project: <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* ld.so: Do not export free/calloc/malloc/realloc functions [BZ #25486]Florian Weimer2020-02-152-10/+0
| | | | | | | | | | | | | | | | | | | Exporting functions and relying on symbol interposition from libc.so makes the choice of implementation dependent on DT_NEEDED order, which is not what some compiler drivers expect. This commit replaces one magic mechanism (symbol interposition) with another one (preprocessor-/compiler-based redirection). This makes the hand-over from the minimal malloc to the full malloc more explicit. Removing the ABI symbols is backwards-compatible because libc.so is always in scope, and the dynamic loader will find the malloc-related symbols there since commit f0b2132b35248c1f4a80f62a2c38cddcc802aa8c ("ld.so: Support moving versioned symbols between sonames [BZ #24741]"). Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* linux: Remove INTERNAL_SYSCALL_DECLAdhemerval Zanella2020-02-142-15/+14
| | | | | | | | | | | With all Linux ABIs using the expected Linux kABI to indicate syscalls errors, the INTERNAL_SYSCALL_DECL is an empty declaration on all ports. This patch removes the 'err' argument on INTERNAL_SYSCALL* macro and remove the INTERNAL_SYSCALL_DECL usage. Checked with a build against all affected ABIs.
* linux: Consolidate INLINE_SYSCALLAdhemerval Zanella2020-02-141-20/+0
| | | | | | | | | | | With all Linux ABIs using the expected Linux kABI to indicate syscalls errors, there is no need to replicate the INLINE_SYSCALL. The generic Linux sysdep.h includes errno.h even for !__ASSEMBLER__, which is ok now and it allows cleanup some archaic code that assume otherwise. Checked with a build against all affected ABIs.
* riscv: Avoid clobbering register parameters in syscallAdhemerval Zanella2020-02-141-28/+56
| | | | | | | | | | | | | | The riscv INTERNAL_SYSCALL macro might clobber the register parameter if the argument itself might clobber any register (a function call for instance). This patch fixes it by using temporary variables for the expressions between the register assignments (as indicated by GCC documentation, 6.47.5.2 Specifying Registers for Local Variables). It is similar to the fix done for MIPS (bug 25523). Checked with riscv64-linux-gnu-rv64imafdc-lp64d build.
* linux: Add support for clock_getres64 vDSOAdhemerval Zanella2020-01-031-1/+1
| | | | | | | | No architecture currently defines the vDSO symbol. On archictures with 64-bit time_t the HAVE_CLOCK_GETRES_VSYSCALL is renamed to HAVE_CLOCK_GETRES64_VSYSCALL, it simplifies clock_gettime code. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* linux: Add support for clock_gettime64 vDSOAdhemerval Zanella2020-01-031-1/+1
| | | | | | | | No architecture currently defines the vDSO symbol. On architectures with 64-bit time_t the HAVE_CLOCK_GETTIME_VSYSCALL is renamed to HAVE_CLOCK_GETTIME64_VSYSCALL, it simplifies clock_gettime code. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* elf: Move vDSO setup to rtld (BZ#24967)Adhemerval Zanella2020-01-032-5/+1
| | | | | | | | | | | | | | | | | | | | | | | | This patch moves the vDSO setup from libc to loader code, just after the vDSO link_map setup. For static case the initialization is moved to _dl_non_dynamic_init instead. Instead of using the mangled pointer, the vDSO data is set as attribute_relro (on _rtld_global_ro for shared or _dl_vdso_* for static). It is read-only even with partial relro. It fixes BZ#24967 now that the vDSO pointer is setup earlier than malloc interposition is called. Also, vDSO calls should not be a problem for static dlopen as indicated by BZ#20802. The vDSO pointer would be zero-initialized and the syscall will be issued instead. Checked on x86_64-linux-gnu, i686-linux-gnu, aarch64-linux-gnu, arm-linux-gnueabihf, powerpc64le-linux-gnu, powerpc64-linux-gnu, powerpc-linux-gnu, s390x-linux-gnu, sparc64-linux-gnu, and sparcv9-linux-gnu. I also run some tests on mips. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* Linux: Use system call tables during buildFlorian Weimer2020-01-021-0/+1
| | | | | | | | | | | | | | | | | | | | | | | Use <arch-syscall.h> instead of <asm/unistd.h> to obtain the system call numbers. A few direct includes of <asm/unistd.h> need to be removed (if the system call numbers are already provided indirectly by <sysdep.h>) or replaced with <sys/syscall.h>. Current Linux headers for alpha define the required system call names, so most of the _NR_* hacks are no longer needed. For the 32-bit arm architecture, eliminate the INTERNAL_SYSCALL_ARM macro, now that we have regular system call names for cacheflush and set_tls. There are more such cleanup opportunities for other architectures, but these cleanups are required to avoid macro redefinition errors during the build. For ia64, it is desirable to use <asm/break.h> directly to obtain the break number for system calls (which is not a system call number itself). This requires replacing __BREAK_SYSCALL with __IA64_BREAK_SYSCALL because the former is defined as an alias in <asm/unistd.h>, but not in <asm/break.h>. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* Linux: Add tables with system call numbersFlorian Weimer2020-01-021-0/+292
| | | | | | | | | | | | | | | | | | | | | | | | | | | The new tables are currently only used for consistency checks with the installed kernel headers and the architecture-independent system call names table. They are based on Linux 5.4. The goal is to use these architecture-specific tables to ensure that system call wrappers are available irrespective of the version of the installed kernel headers. The tables are formatted in the form of C header files so that they can be used directly in an #include directive, without external preprocessing. (External preprocessing of a plain table file would introduce cross-subdirectory dependency issues.) However, the intent is that they can still be treated as tables and can be processed by simple tools. The irregular system call names on 32-bit arm add a complication. The <fixup-asm-unistd.h> header is introduced to work around that, and the system calls are listed under regular names in the <arch-syscall.h> file. A make target, update-syscalls-list, is added to patch the glibc sources with data from the current kernel headers. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* Update copyright dates with scripts/update-copyrights.Joseph Myers2020-01-0124-24/+24
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* nptl: Move waitpid implementation to libcAdhemerval Zanella2019-12-191-1/+0
| | | | Checked on x86_64-linux-gnu and powerpc64le-linux-gnu.
* nptl: Move wait implementation to libcAdhemerval Zanella2019-12-191-2/+0
| | | | Checked on x86_64-linux-gnu and powerpc64le-linux-gnu.
* nptl: Move nanosleep implementation to libcAdhemerval Zanella2019-11-061-2/+0
| | | | | | | | | Checked on x86_64-linux-gnu and powerpc64le-linux-gnu. I also checked the libpthread.so .gnu.version_d entries for every ABI affected and all of them contains the required versions (including for architectures which exports __nanosleep with a different version). Reviewed-by: Florian Weimer <fweimer@redhat.com>
* nptl: Add pthread_clockjoin_npMike Crowe2019-11-011-0/+1
| | | | | | | | | | | Introduce pthread_clockjoin_np as a version of pthread_timedjoin_np that accepts a clockid_t parameter to indicate which clock the timeout should be measured against. This mirrors the recently-added POSIX-proposed "clock" wait functions. Checked on x86_64-linux-gnu. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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