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path: root/src/syscall/syscall_linux_loong64.go
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5 dayssyscall: avoid nil pointer dereference in UtimeTobias Klauser
Passing a nil buf *Utimbuf to Utime on linux/{arm64,loong64,riscv64} will cause a nil pointer dereference. Check buf explicitly to avoid this case. Change-Id: Ic93484e95e10f92b8266aa598de82ad35fab17d8 Reviewed-on: https://go-review.googlesource.com/c/go/+/764580 LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> Reviewed-by: Ian Lance Taylor <iant@golang.org> Reviewed-by: David Chase <drchase@google.com> Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
2024-08-30syscall: always use prlimit for getrlimit/setrlimit on LinuxIan Lance Taylor
Linux added the prlimit system call in version 2.6.36. As our minimum Linux kernel version is now 3.2, simplify the various getrlimit/setlrimit implementations to just always use prlimit. For #67001 Change-Id: I2512c21c947d0bc83f8f9077c143163fd8d83be3 Reviewed-on: https://go-review.googlesource.com/c/go/+/609178 Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Damien Neil <dneil@google.com> Auto-Submit: Ian Lance Taylor <iant@golang.org> Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2023-11-21internal/syscall/unix: add PidFDSendSignal for LinuxKir Kolyshkin
CL 520266 added pidfd_send_signal linux syscall numbers to the syscall package for the sake of a unit test. As pidfd_send_signal will be used from the os package, let's revert the changes to syscall package, add the pidfd_send_signal syscall numbers and the implementation to internal/syscall/unix, and change the above test to use it. Updates #51246. For #62654. Change-Id: I862174c3c1a64baf1080792bdb3a1c1d1b417bb4 Reviewed-on: https://go-review.googlesource.com/c/go/+/528436 Run-TryBot: Kirill Kolyshkin <kolyshkin@gmail.com> Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Michael Knyszek <mknyszek@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Michael Pratt <mpratt@google.com>
2023-11-08syscall: use fchmodat2 in FchmodatTobias Klauser
The fchmodat2 syscall was added in Linux kernel 6.6. Mirror the implementation in golang.org/x/sys/unix.Fchmodat (CL 539635) and use fchmodat2 in Fchmodat if flags are given. It will return ENOSYS on older kernels (or EINVAL or any other bogus error in some container implementations). Also update ztypes_linux_$GOARCH.go for all linux platforms to add _AT_EMPTY_PATH. It was added to linux/types in CL 407694 but was only updated for linux/loong64 at that time. Updates #61636 Change-Id: I863d06e35cd366f1cf99052e9f77c22ab8168b3f Reviewed-on: https://go-review.googlesource.com/c/go/+/540435 Reviewed-by: Mauri de Souza Meneguzzo <mauri870@gmail.com> TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Heschi Kreinick <heschi@google.com> Reviewed-by: Bryan Mills <bcmills@google.com> Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
2023-09-07syscall: add support to get pidfd from ForkExec on LinuxKir Kolyshkin
Add PidFD support, so that if the PidFD pointer in SysProcAttr is not nil, ForkExec (and thus all its users) obtains a pidfd from the kernel during clone(), and writes the result (or -1, if the functionality is not supported by the kernel) into *PidFD. The functionality to get pidfd is implemented for both clone3 and clone. For the latter, an extra argument to rawVforkSyscall is needed, thus the change in asm files. Add a trivial test case checking the obtained pidfd can be used to send a signal to a process, using pidfd_send_signal. To test clone3 code path, add a flag available to tests only. Updates #51246. Change-Id: I2212b69e1a657163c31b4a6245b076bc495777a3 Reviewed-on: https://go-review.googlesource.com/c/go/+/520266 Auto-Submit: Ian Lance Taylor <iant@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Kirill Kolyshkin <kolyshkin@gmail.com>
2023-03-15syscall: restore original NOFILE rlimit in child processIan Lance Taylor
If we increased the NOFILE rlimit when starting the program, restore the original rlimit when forking a child process. For #46279 Change-Id: Ia5d2af9ef435e5932965c15eec2e428d2130d230 Reviewed-on: https://go-review.googlesource.com/c/go/+/476097 Reviewed-by: Bryan Mills <bcmills@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com> TryBot-Bypass: Ian Lance Taylor <iant@google.com>
2022-09-09syscall: add CgroupFD support for ForkExec on LinuxKir Kolyshkin
Implement CLONE_INTO_CGROUP feature, allowing to put a child in a specified cgroup in a clean and simple way. Note that the feature only works for cgroup v2, and requires Linux kernel 5.7 or newer. Using the feature requires a new syscall, clone3. Currently this is the only reason to use clone3, but the code is structured in a way so that other cases may be easily added in the future. Add a test case. While at it, try to simplify the syscall calling code in forkAndExecInChild1, which became complicated over time because: 1. It was using either rawVforkSyscall or RawSyscall6 depending on whether CLONE_NEWUSER was set. 2. On Linux/s390, the first two arguments to clone(2) system call are swapped (which deserved a mention in Linux ABI hall of shame). It was worked around in rawVforkSyscall on s390, but had to be implemented via a switch/case when using RawSyscall6, making the code less clear. Let's - modify rawVforkSyscall to have two arguments (which is also required for clone3); - remove the arguments workaround from s390 asm, instead implementing arguments swap in the caller (which still looks ugly but at least it's done once and is clearly documented now); - use rawVforkSyscall for all cases (since it is essentially similar to RawSyscall6, except for having less parameters, not returning r2, and saving/restoring the return address before/after syscall on 386 and amd64). Updates #51246. Change-Id: Ifcd418ebead9257177338ffbcccd0bdecb94474e Reviewed-on: https://go-review.googlesource.com/c/go/+/417695 Auto-Submit: Ian Lance Taylor <iant@google.com> Reviewed-by: Michael Knyszek <mknyszek@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com> Run-TryBot: Ian Lance Taylor <iant@google.com> Run-TryBot: Kirill Kolyshkin <kolyshkin@gmail.com> TryBot-Result: Gopher Robot <gobot@golang.org>
2022-09-01syscall: Faccessat: use faccessat2 on linuxKir Kolyshkin
Linux kernel 5.8 added the faccessat2 syscall taking a flags argument. Attempt to use it in Faccessat and fall back to the existing implementation mimicking glibc faccessat. Do not export the new syscall value so we keep syscall API intact. Part of this commit is generated by: GOOS=linux ./mkall.sh -syscalls zsyscall_linux_*.go This is similar to [1] amended by [2]. Required for [3]. [1] https://go-review.googlesource.com/c/sys/+/246537 [2] https://go-review.googlesource.com/c/sys/+/246817 [3] https://go-review.googlesource.com/c/go/+/414824 Co-authored-by: Tobias Klauser <tklauser@distanz.ch> Change-Id: Ib7fe5ba853c15d92e869df9a16b56b79b96e43a6 Reviewed-on: https://go-review.googlesource.com/c/go/+/416115 Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com> Reviewed-by: Ian Lance Taylor <iant@google.com> Reviewed-by: Bryan Mills <bcmills@google.com>
2022-08-18syscall: implement EpollCreate using EpollCreate1 on all linux platformsTobias Klauser
Most newer architectures (e.g. arm64, riscv64, loong64) don't provide the epoll_create syscall. Some systems (e.g. Android) block it even if it were available. In the kernel, the epoll_create syscall is implemented [1] the same way EpollCreate is implemented in this package for platforms without the epoll_create syscall. The epoll_create1 syscall is available since Linux kernel 2.6.27 and the minimum required kernel version is 2.6.32 since Go 1.18 (see #45964). Thus, avoid the separate wrapper and consistently implement EpollCreate using EpollCreate1. [1] https://elixir.bootlin.com/linux/v5.15-rc1/source/fs/eventpoll.c#L2006 The same change was already done in CL 349809 for golang.org/x/sys/unix. For #45964 Change-Id: I5463b208aa7ae236fa2c175d6d3ec6568f1840b0 Reviewed-on: https://go-review.googlesource.com/c/go/+/411594 Reviewed-by: Bryan Mills <bcmills@google.com> Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com> Reviewed-by: Ian Lance Taylor <iant@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
2022-06-08syscall: remove unused setgroups on linux/loong64Tobias Klauser
Setgroups in syscall_linux.go already wraps the setgroups(2) syscall with correct POSIX semantics (ref. CL 210639). Change-Id: I961cd7c7fce1d70d23bf13cc82cad17854bbf40e Reviewed-on: https://go-review.googlesource.com/c/go/+/411214 Reviewed-by: Cherry Mui <cherryyz@google.com> Run-TryBot: Ian Lance Taylor <iant@google.com> Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com> TryBot-Result: Gopher Robot <gobot@golang.org> Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com> Reviewed-by: Ian Lance Taylor <iant@google.com> Auto-Submit: Ian Lance Taylor <iant@google.com>
2022-06-07syscall: remove unused accept on linux/loong64Tobias Klauser
accept is no longer used on Linux since CL 346849 changed Accept to use accept4 only. This follows CL 386415 which already removed accept on all other Linux platforms before the linux/loong64 port was submitted. For #45964 Change-Id: I26945ff780e71174a0b0c2f5313c4bc1e1cbf786 Reviewed-on: https://go-review.googlesource.com/c/go/+/410737 Reviewed-by: Cherry Mui <cherryyz@google.com> Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com> Auto-Submit: Ian Lance Taylor <iant@google.com> Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com> TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Ian Lance Taylor <iant@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com>
2022-05-26syscall: update linux/loong64 kernel ABI, emulate fstatat with statxWANG Xuerui
The linux/loong64 kernel ABI has changed a little since the inception of the Go port; most notably fstat and fstatat are being removed [1], leaving only statx as the stat mechanism. Fortunately the structs are easy enough to translate, and we now exclusively use statx across the board on loong64 for best compatibility with past and future kernels (due to the architecture's young age, statx is always available). In wiring up the statx calls, it turned out the linux/loong64 syscall definitions were out-of-date, so the generation script received some tweaking as well. [1]: https://lore.kernel.org/all/20220518092619.1269111-1-chenhuacai@loongson.cn/ Change-Id: Ifebb9ab9fef783683e453fa331d623575e824a48 Reviewed-on: https://go-review.googlesource.com/c/go/+/407694 Run-TryBot: Ian Lance Taylor <iant@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com> Reviewed-by: abner chenc <chenguoqi@loongson.cn> Auto-Submit: Ian Lance Taylor <iant@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Alex Rakoczy <alex@golang.org> Run-TryBot: Ian Lance Taylor <iant@golang.org>
2022-05-20syscall: add syscall support for linux/loong64Xiaodong Liu
Contributors to the loong64 port are: Weining Lu <luweining@loongson.cn> Lei Wang <wanglei@loongson.cn> Lingqin Gong <gonglingqin@loongson.cn> Xiaolin Zhao <zhaoxiaolin@loongson.cn> Meidan Li <limeidan@loongson.cn> Xiaojuan Zhai <zhaixiaojuan@loongson.cn> Qiyuan Pu <puqiyuan@loongson.cn> Guoqi Chen <chenguoqi@loongson.cn> This port has been updated to Go 1.15.6: https://github.com/loongson/go Updates #46229 Change-Id: Ia676bd2875701639314cadbd39d97620afb3f0a2 Reviewed-on: https://go-review.googlesource.com/c/go/+/342317 Run-TryBot: Ian Lance Taylor <iant@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Michael Knyszek <mknyszek@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com> Auto-Submit: Ian Lance Taylor <iant@google.com>
generated by cgit v1.3 (git 2.53.0) at 2026-04-15 09:25:18 +0000