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* Linux: sigaltstack syscall number is always availableFlorian Weimer2020-03-031-4/+0
| | | | | | Due to the built-in tables, __NR_sigaltstack is always defined. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Linux: sched_getaffinity syscall number is always availableFlorian Weimer2020-03-031-7/+3
| | | | | | Due to the built-in tables, __NR_sched_getaffinity is always defined. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Linux: sched_setaffinity syscall number is always availableFlorian Weimer2020-03-031-6/+1
| | | | | | Due to the built-in tables, __NR_sched_setaffinity is always defined. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Linux: statx syscall number is always availableFlorian Weimer2020-03-031-7/+4
| | | | | | Due to the built-in tables, __NR_statx is always defined. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Linux: mq_* syscall numbers are always availableFlorian Weimer2020-03-037-41/+0
| | | | | | | | Due to the built-in tables, __NR_mq_getsetattr, __NR_mq_notify, __NR_mq_open, __NR_mq_timedreceive, __NR_mq_timedsend, __NR_mq_unlink are always defined. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Linux: mlock2 syscall number is always availableFlorian Weimer2020-03-031-2/+0
| | | | | | Due to the built-in tables, __NR_mlock2 is always defined. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Linux: copy_file_range syscall number is always availableFlorian Weimer2020-03-031-5/+0
| | | | | | Due to the built-in tables, __NR_copy_file_range is always defined. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Linux: renameat2 syscall number is always availableFlorian Weimer2020-03-031-4/+3
| | | | | | Due to the built-in tables, __NR_renameat2 is always defined. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Add missing libc_hidden_def for __utimensat64Andreas Schwab2020-03-021-0/+2
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* elf: Add elf/check-wx-segment, a test for the presence of WX segmentsFlorian Weimer2020-03-021-2/+7
| | | | | | | Writable, executable segments defeat security hardening. The existing check for DT_TEXTREL does not catch this. hppa and SPARC currently keep the PLT in an RWX load segment.
* nios2: Fix Linux kABI for syscall returnAdhemerval Zanella2020-02-201-1/+1
| | | | From the type introduced at 861be5fd66.
* nptl: Move pthread_setschedparam implementation into libcFlorian Weimer2020-02-2027-27/+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 Weimer2020-02-2027-27/+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 Weimer2020-02-2027-43/+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 Weimer2020-02-2027-43/+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 Weimer2020-02-2027-27/+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 Weimer2020-02-2027-27/+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 Weimer2020-02-2027-27/+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 Weimer2020-02-2027-27/+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 Weimer2020-02-2027-27/+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 Weimer2020-02-2027-27/+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>
* Block all signals on timer_create thread (BZ#10815)Adhemerval Zanella2020-02-192-60/+55
| | | | | | | | | | | | | | | | | | | | The behavior of the signal mask on threads created by timer_create for SIGEV_THREAD timers are implementation-defined and glibc explicit unblocks all signals before calling the user-defined function. This behavior, although not incorrect standard-wise, opens a race if a program using a blocked rt-signal plus sigwaitinfo (and without an installed signal handler for the rt-signal) receives a signal while executing the used-defined function for SIGEV_THREAD. A better alternative discussed in bug report is to rather block all signals (besides the internal ones not available to application usage). This patch fixes this issue by only unblocking SIGSETXID (used on set*uid function) and SIGCANCEL (used for thread cancellation). Checked on x86_64-linux-gnu and i686-linux-gnu.
* Fix tst-pkey expectations on pkey_get [BZ #23202]Lucas A. M. Magalhaes2020-02-191-4/+6
| | | | | | | | | | | | | | | | From the GNU C Library manual, the pkey_set can receive a combination of PKEY_DISABLE_WRITE and PKEY_DISABLE_ACCESS. However PKEY_DISABLE_ACCESS is more restrictive than PKEY_DISABLE_WRITE and includes its behavior. The test expects that after setting (PKEY_DISABLE_WRITE|PKEY_DISABLE_ACCESS) pkey_get should return the same. This may not be true as PKEY_DISABLE_ACCESS will succeed in describing the state of the key in this case. The pkey behavior during signal handling is different between x86 and POWER. This change make the test compatible with both architectures. Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
* y2038: linux: Provide __gettimeofday64 implementationLukasz Majewski2020-02-183-3/+45
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In the glibc the gettimeofday can use vDSO (on power and x86 the USE_IFUNC_GETTIMEOFDAY is defined), gettimeofday syscall or 'default' ___gettimeofday() from ./time/gettime.c (as a fallback). In this patch the last function (___gettimeofday) has been refactored and moved to ./sysdeps/unix/sysv/linux/gettimeofday.c to be Linux specific. The new __gettimeofday64 explicit 64 bit function for getting 64 bit time from the kernel (by internally calling __clock_gettime64) has been introduced. Moreover, a 32 bit version - __gettimeofday has been refactored to internally use __gettimeofday64. The __gettimeofday is now supposed to be used on systems still supporting 32 bit time (__TIMESIZE != 64) - hence the necessary check for time_t potential overflow and conversion of struct __timeval64 to 32 bit struct timespec. The iFUNC vDSO direct call optimization has been removed from both i686 and powerpc32 (USE_IFUNC_GETTIMEOFDAY is not defined for those architectures anymore). The Linux kernel does not provide a y2038 safe implementation of gettimeofday neither it plans to provide it in the future, clock_gettime64 should be used instead. Keeping support for this optimization would require to handle another build permutation (!__ASSUME_TIME64_SYSCALLS && USE_IFUNC_GETTIMEOFDAY) which adds more complexity and has limited use (since the idea is to eventually have a y2038 safe glibc build). Build tests: ./src/scripts/build-many-glibcs.py glibcs Run-time tests: - Run specific tests on ARM/x86 32bit systems (qemu): https://github.com/lmajewski/meta-y2038 and run tests: https://github.com/lmajewski/y2038-tests/commits/master Above tests were performed with Y2038 redirection applied as well as without to test proper usage of both __gettimeofday64 and __gettimeofday. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> [Including some commit message improvement]
* Linux: Work around kernel bugs in chmod on /proc/self/fd paths [BZ #14578]Florian Weimer2020-02-181-4/+24
| | | | | | | | | | It appears that the ability to change symbolic link modes through such paths is unintended. On several file systems, the operation fails with EOPNOTSUPP, even though the symbolic link permissions are updated. The expected behavior is a failure to update the permissions, without file system changes. Reviewed-by: Matheus Castanho <msc@linux.ibm.com>
* mips: Fix bracktrace result for signal framesAdhemerval Zanella2020-02-181-0/+67
| | | | | | | | | | | | | | | | MIPS fallback code handle a frame where its FDE can not be obtained (for instance a signal frame) by reading the kernel allocated signal frame and adding '2' to the value of 'sc_pc' [1]. The added value is used to recognize an end of an EH region on mips16 [2]. The fix adjust the obtained signal frame value and remove the libgcc added value by checking if the previous frame is a signal frame one. Checked with backtrace and tst-sigcontext-get_pc tests on mips-linux-gnu and mips64-linux-gnu. [1] libgcc/config/mips/linux-unwind.h from gcc code. [2] gcc/config/mips/mips.h from gcc code. */
* <fd_to_filename.h>: Add type safety and port to HurdFlorian Weimer2020-02-181-20/+2
| | | | | | | | | The new type struct fd_to_filename makes the allocation of the backing storage explicit. Hurd uses /dev/fd, not /proc/self/fd. Co-Authored-By: Paul Eggert <eggert@cs.ucla.edu>
* ld.so: Do not export free/calloc/malloc/realloc functions [BZ #25486]Florian Weimer2020-02-1546-222/+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>
* arm: fix use of INTERNAL_SYSCALL_CALLAndreas Schwab2020-02-151-1/+1
| | | | | Remove extra argument from INTERNAL_SYSCALL_CALL macro call. Fixes commit bc2eb9321e ("linux: Remove INTERNAL_SYSCALL_DECL").
* linux: Remove INTERNAL_SYSCALL_DECLAdhemerval Zanella2020-02-1493-457/+360
| | | | | | | | | | | 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 Zanella2020-02-1423-472/+50
| | | | | | | | | | | 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.
* s390: Consolidate Linux syscall definitionAdhemerval Zanella2020-02-143-192/+103
| | | | | | The {INTERNAL,INLINE}_SYSCALL are defined only on s390 sysdep.h. Checked on s390x-linux-gnu and s390-linux-gnu.
* 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.
* microblaze: Avoid clobbering register parameters in syscallAdhemerval Zanella2020-02-141-35/+56
| | | | | | | | | | | | | | The microblaze 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 microblaze-linux-gnu and microblazeel-linux-gnu build.
* nios2: Use Linux kABI for syscall returnAdhemerval Zanella2020-02-141-5/+5
| | | | | | | | | | It changes the nios INTERNAL_SYSCALL_RAW macro to return a negative value instead of the 'r2' register value on the 'err' macro argument. The macro INTERNAL_SYSCALL_DECL is no longer required, and the INTERNAL_SYSCALL_ERROR_P macro follows the other Linux kABIs. Checked with a build against nios2-linux-gnu.
* mips: Use Linux kABI for syscall returnAdhemerval Zanella2020-02-143-53/+23
| | | | | | | | | | | | | It changes the mips INTERNAL_SYSCALL* and internal_syscall* macros to return a negative value instead of the 'a3' register value on then 'err' macro argument. The macro INTERNAL_SYSCALL_DECL is no longer required, and the INTERNAL_SYSCALL_ERROR_P macro follows the other Linux kABIs. The redefinition of INTERNAL_VSYSCALL_CALL is also no longer required. Checked on mips64-linux-gnu, mips64n32-linux-gnu, and mips-linux-gnu.
* mips64: Consolidate Linux sysdep.hAdhemerval Zanella2020-02-142-390/+68
| | | | | | | | | | | | | The mips64 Linux syscall macros only differs argument type and the requirement of sign-extending values on n32. The headers are consolidate by parameterizing the arguments with a new type, __syscall_arg_t, and by defining the ARGIFY for n64. Also, the generic unix mips64 sysdep is essentially the same, only the load instruction need to be adjusted depending of the ABI. Checked on mips64-linux-gnu and mips64n32-linux-gnu.
* ia64: Use Linux kABI for syscall returnAdhemerval Zanella2020-02-141-34/+24
| | | | | | | | | | It changes the ia64 INTERNAL_SYSCALL_NCS macro to return a negative value instead of the 'r10' register value on the 'err' macro argument. The macro INTERNAL_SYSCALL_DECL is no longer required, and the INTERNAL_SYSCALL_ERROR_P macro follows the other Linux kABIs. Checked on ia64-linux-gnu.
* alpha: Refactor syscall and Use Linux kABI for syscall returnAdhemerval Zanella2020-02-142-13/+348
| | | | | | | | | | | | | | It highly unlikely that alpha will be ported to anything else than Linux, so this patch moves the generic unix syscall definition to Linux and adapt it to Linux kernel ABI. It changes the internal_syscall* macros to return a negative value instead of the '$19' register value on the 'err' macro argument. The macro INTERNAL_SYSCALL_DECL is no longer required, and the INTERNAL_SYSCALL_ERROR_P macro follows the other Linux kABIs. Checked on alpha-linux-gnu.
* sparc: Avoid clobbering register parameters in syscallAdhemerval Zanella2020-02-141-27/+53
| | | | | | | | | | | | | | The sparc 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 on sparc64-linux-gnu and sparcv9-linux-gnu.
* sparc: Use Linux kABI for syscall returnAdhemerval Zanella2020-02-143-48/+38
| | | | | | | | | | | | | | | | | It changes the sparc internal_syscall* macros to return a negative value instead of the 'g1' register value in the 'err' macro argument. The __SYSCALL_STRING macro is also changed to no set the 'g1' value, since 'o1' already holds all the required information to check if syscall has failed. The macro INTERNAL_SYSCALL_DECL is no longer required, and the INTERNAL_SYSCALL_ERROR_P macro follows the other Linux kABIs. The redefinition of INTERNAL_VSYSCALL_CALL is also no longer required. Checked on sparc64-linux-gnu and sparcv9-linux-gnu. It fixes the sporadic issues on sparc32 where clock_nanosleep does not act as cancellation entrypoint.
* powerpc: Use Linux kABI for syscall returnAdhemerval Zanella2020-02-141-7/+5
| | | | | | | | | | | | It changes the powerpc INTERNAL_VSYSCALL_CALL and INTERNAL_SYSCALL_NCS to return a negative value instead of the returning the CR value in the 'err' macro argument. The macro INTERNAL_SYSCALL_DECL is no longer required, and the INTERNAL_SYSCALL_ERROR_P macro follows the other Linux kABIs. Checked on powerpc64-linux-gnu, powerpc64le-linux-gnu, and powerpc-linux-gnu-power4.
* powerpc: Consolidate Linux syscall definitionAdhemerval Zanella2020-02-143-409/+209
| | | | | | | | | | | | | | | | | | | | | | | | The diferences between powerpc64{le} and powerpc32 Linux sysdep.h are: 1. On both vDSO and syscall macros the volatile registers r9, r10, r11, and r12 are used as input operands on powerpc32 and as clobber registers on powerpc64. However the outcome is essentially the same, it advertise the register might be clobbered by the kernel (although Linux won't leak register information to userland in such case). 2. The LOADARGS* macros uses a different size to check for invalid types. 3. The pointer mangling support guard pointer loading uses ABI specific instruction and register. This patch consolidates on only one sysdep by using the the powerpc64 version as default and add the adjustments required for powerpc32. Checked on powerpc64-linux-gnu, powerpc64le-linux-gnu, and powerpc-linux-gnu-power4.
* i386: Enable CET support in ucontext functionsH.J. Lu2020-02-146-3/+425
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1. getcontext and swapcontext are updated to save the caller's shadow stack pointer and return address. 2. setcontext and swapcontext are updated to restore shadow stack and jump to new context directly. 3. makecontext is updated to allocate a new shadow stack and set the caller's return address to the helper code, L(exitcode). 4. Since we no longer save and restore EAX, ECX and EDX in getcontext, setcontext and swapcontext, we can use them as scratch register slots to enable CET in ucontext functions. Since makecontext allocates a new shadow stack when making a new context and kernel allocates a new shadow stack for clone/fork/vfork syscalls, we track the current shadow stack base. In setcontext and swapcontext, if the target shadow stack base is the same as the current shadow stack base, we unwind the shadow stack. Otherwise it is a stack switch and we look for a restore token. We enable shadow stack at run-time only if program and all used shared objects, including dlopened ones, are shadow stack enabled, which means that they must be compiled with GCC 8 or above and glibc 2.28 or above. We need to save and restore shadow stack only if shadow stack is enabled. When caller of getcontext, setcontext, swapcontext and makecontext is compiled with smaller ucontext_t, shadow stack won't be enabled at run-time. We check if shadow stack is enabled before accessing the extended field in ucontext_t. Tested on i386 CET/non-CET machines. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* tst-clone3: Use __NR_futex_time64 if we don't have __NR_futexAlistair Francis2020-02-141-0/+4
| | | | | | | | | | | We can't include sysdep.h in the test case (it introduces lots of strange failures) so __NR_futex isn't redifined to __NR_futex_time64 by 64-bit time_t 32-bit archs (y2038 safe). To allow the test to pass let's just do the __NR_futex_time64 syscall if we don't have __NR_futex defined. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* powerpc64: Add memory protection key support [BZ #23202]Florian Weimer2020-02-143-0/+145
| | | | | | | | | The 32-bit protection key behavior is somewhat unclear on 32-bit powerpc, so this change is restricted to the 64-bit variants. Flag translation is needed because of hardware differences between the POWER implementation (read and write flags) and the Intel implementation (write and read+write flags).
* Use gcc -finput-charset=ascii for check-installed-headers.Stefan Liebler2020-02-134-4/+4
| | | | | | | | | | | | | | | | | | | | A non-ascii character in the installed headers leads now to: error: failure to convert ascii to UTF-8 Such a finding in s390 specific fenv.h leads to fails in GCC testsuite. See glibc commit 08aea89ef67c5780ae734073494df0a451bce20f. Adding this gcc option also to our tests was proposed by Florian Weimer. This change also found a hit in resource.h where now "microseconds" is used. I've adjusted all the resource.h files. I've used the following command to check for further hits in headers. LC_ALL=C find -name "*.h" -exec grep -PHn "[\x80-\xFF]" {} \; Tested on s390x and x86_64. Reviewed-by: Zack Weinberg <zackw@panix.com>
* alpha: Fix static gettimeofday symbolAdhemerval Zanella2020-02-131-5/+2
| | | | | | | | By undef strong_alias on alpha implementation, the default_symbol_version macro becomes an empty macro on static build. It fixes the issue introduced at c953219420. Checked on alpha-linux-gnu with a 'make check run-built-tests=no'.
* mips: Fix argument passing for inlined syscalls on Linux [BZ #25523]WANG Xuerui2020-02-123-52/+104
| | | | | | | | | | | | | | According to [gcc documentation][1], temporary variables must be used for the desired content to not be call-clobbered. Fix the Linux inline syscall templates by adding temporary variables, much like what x86 did before (commit 381a0c26d73e0f074c962e0ab53b99a6c327066d). Tested with gcc 9.2.0, both cross-compiled and natively on Loongson 3A4000. [1]: https://gcc.gnu.org/onlinedocs/gcc/Local-Register-Variables.html
* mips: Use 'long int' and 'long long int' in linux syscall codeWANG Xuerui2020-02-1214-220/+230
| | | | Style fixes only, no functional change.
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-11-12 23:14:40 +0000