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2021-03-23Move the code that manages floating-point state to a separate packageAndrei Vagin
This change is inspired by Adin's cl/355256448. PiperOrigin-RevId: 364695931
2021-03-03[op] Replace syscall package usage with golang.org/x/sys/unix in pkg/.Ayush Ranjan
The syscall package has been deprecated in favor of golang.org/x/sys. Note that syscall is still used in the following places: - pkg/sentry/socket/hostinet/stack.go: some netlink related functionalities are not yet available in golang.org/x/sys. - syscall.Stat_t is still used in some places because os.FileInfo.Sys() still returns it and not unix.Stat_t. Updates #214 PiperOrigin-RevId: 360701387
2021-02-17Add gohacks.Slice/StringHeader.Jamie Liu
See https://github.com/golang/go/issues/19367 for rationale. Note that the upstream decision arrived at in that thread, while useful for some of our use cases, doesn't account for all of our SliceHeader use cases (we often use SliceHeader to extract pointers from slices in a way that avoids bounds checking and/or handles nil slices correctly) and also doesn't exist yet. PiperOrigin-RevId: 358071574
2021-02-03arm64: clean codeRobin Luk
In order to improve the performance and stability, I reorg 2 modules slightly. arch: no red zone on Arm64. ring0: use stp instead of movd, and set RSV_REG_APP=R19. Signed-off-by: Robin Luk <lubin.lu@antgroup.com>
2020-12-15Internal change.Andrei Vagin
PiperOrigin-RevId: 347720083
2020-12-11Remove existing nogo exceptions.Adin Scannell
PiperOrigin-RevId: 347047550
2020-12-03Implement `fcntl` options `F_GETSIG` and `F_SETSIG`.Etienne Perot
These options allow overriding the signal that gets sent to the process when I/O operations are available on the file descriptor, rather than the default `SIGIO` signal. Doing so also populates `siginfo` to contain extra information about which file descriptor caused the event (`si_fd`) and what events happened on it (`si_band`). The logic around which FD is populated within `si_fd` matches Linux's, which means it has some weird edge cases where that value may not actually refer to a file descriptor that is still valid. This CL also ports extra S/R logic regarding async handler in VFS2. Without this, async I/O handlers aren't properly re-registered after S/R. PiperOrigin-RevId: 345436598
2020-10-02Merge pull request #4035 from lubinszARM:pr_misc_01gVisor bot
PiperOrigin-RevId: 335051794
2020-09-29Replace remaining uses of reflection-based marshalling.Rahat Mahmood
- Rewrite arch.Stack.{Push,Pop}. For the most part, stack now implements marshal.CopyContext and can be used as the target of marshal operations. Stack.Push had some extra logic for automatically null-terminating slices. This was only used for two specific types of slices, and is now handled explicitly. - Delete usermem.CopyObject{In,Out}. - Replace most remaining uses of the encoding/binary package with go-marshal. Most of these were using the binary package to compute the size of a struct, which go-marshal can directly replace. ~3 uses of the binary package remain. These aren't reasonably replaceable by go-marshal: for example one use is to construct the syscall trampoline for systrap. - Fill out remaining convenience wrappers in the primitive package. PiperOrigin-RevId: 334502375
2020-09-25arm64: some minor changesBin Lu
This patch adds minor changes for Arm64 platform: 1, add SetRobustList/GetRobustList support for arm64 syscall module. 2, add newfstatat support for arm64 vfs2 syscall module. 3, add tls value in ProtoBuf. Signed-off-by: Bin Lu <bin.lu@arm.com>
2020-09-15Enable automated marshalling for the syscall package.Rahat Mahmood
PiperOrigin-RevId: 331940975
2020-09-11Move the 'marshal' and 'primitive' packages to the 'pkg' directory.Rahat Mahmood
PiperOrigin-RevId: 331256608
2020-08-12Running hello-world on Thunderx2 with kvmBin Lu
Signed-off-by: Bin Lu <bin.lu@arm.com>
2020-07-23kvm-tls-2:add the preservation of user-TLS in the Arm64 kvm platformlubinszARM
This patch load/save TLS for the container application. Related issue: full context-switch supporting for Arm64 #1238 COPYBARA_INTEGRATE_REVIEW=https://github.com/google/gvisor/pull/2761 from lubinszARM:pr_tls_2 cb5dbca1c9c3f378002406da7a58887f9b5032b3 PiperOrigin-RevId: 322887044
2020-06-09initialize an empty fp state area for sentry on Arm64Bin Lu
We need to initialize an empty fp state area for the sentry. Signed-off-by: Bin Lu <bin.lu@arm.com>
2020-05-15Minor formatting updates for gvisor.dev.Adin Scannell
* Aggregate architecture Overview in "What is gVisor?" as it makes more sense in one place. * Drop "user-space kernel" and use "application kernel". The term "user-space kernel" is confusing when some platform implementation do not run in user-space (instead running in guest ring zero). * Clear up the relationship between the Platform page in the user guide and the Platform page in the architecture guide, and ensure they are cross-linked. * Restore the call-to-action quick start link in the main page, and drop the GitHub link (which also appears in the top-right). * Improve image formatting by centering all doc and blog images, and move the image captions to the alt text. PiperOrigin-RevId: 311845158
2020-05-11Add fpsimd support in sigreturn on Arm64Bin Lu
Signed-off-by: Bin Lu <bin.lu@arm.com>
2020-04-28code clean in arch moduleBin Lu
Signed-off-by: Bin Lu <bin.lu@arm.com>
2020-04-25Enable automated marshalling for signals and the arch package.Rahat Mahmood
PiperOrigin-RevId: 308472331
2020-04-23Merge pull request #1819 from lubinszARM:pr_signal_2gVisor bot
PiperOrigin-RevId: 308100771
2020-04-13Merge pull request #2168 from xiaobo55x:ptrace_testgVisor bot
PiperOrigin-RevId: 306306809
2020-04-13Remove obsolete TODOs for b/38173783Jon Budd
The comments in the ticket indicate that this behavior is fine and that the ticket should be closed, so we shouldn't need pointers to the ticket. PiperOrigin-RevId: 306266071
2020-04-10Enable syscall ptrace test on arm64.Haibo Xu
Signed-off-by: Haibo Xu <haibo.xu@arm.com> Change-Id: I5bb8fa7d580d173b1438d6465e1adb442216c8fa
2020-04-01Fix 386 build tagsMichael Pratt
The build tag for 32-bit x86 is 386, not i386. Updates #2298 PiperOrigin-RevId: 304206373
2020-03-31Arm64 signal#2: signal support in arch moduleBin Lu
SA_RESTORER is always used on Intel platform. But this flag is optional on other platforms. The vdso is enabled, so we can use the sigreturn trampolines the vdso provides instead on Arm platform. Signed-off-by: Bin Lu <bin.lu@arm.com>
2020-03-18Merge pull request #2061 from lubinszARM:pr_restart_syscallgVisor bot
PiperOrigin-RevId: 301700868
2020-03-12passed the syscall test case 'alarm' on Arm64 platformBin Lu
This issue was caused by 'restart_syscall'. The value of Register R0 should be stored after finishing sysemu. So that we can restore the value and restart syscall. Signed-off-by: Bin Lu <bin.lu@arm.com>
2020-03-09Enable thread local storage support on arm64.Haibo Xu
Linux use the task.thread.uw.tp_value field to store the TLS pointer on arm64 platform, and we use a similar way in gvisor to store it in the arch/State struct. Signed-off-by: Haibo Xu <haibo.xu@arm.com> Change-Id: Ie76b5c6d109bc27ccfd594008a96753806db7764
2020-02-28Define CPUIDInstruction for arm64Andrei Vagin
There is no cpuid instruction on arm64, so we need to defined it just to avoid a compile time error. Signed-off-by: Andrei Vagin <avagin@gmail.com>
2020-02-27Merge of a369c88c0c4ece5239855000d28df045111c1be7gVisor bot
PiperOrigin-RevId: 297674924
2020-02-20Lazy-fpsimd support patch series#1: add Arm64-fpsimd support to arch moduleBin Lu
This patch defines the structures and adds the implementations for fpsimd initialization. Signed-off-by: Bin Lu <bin.lu@arm.com>
2020-02-13Add definition of arch.ARMTrapFlag.Haibo Xu
Fixes #1708 Signed-off-by: Haibo Xu haibo.xu@arm.com Change-Id: Ib15768692ead17c81c06f7666ca3f0a14064c3a0
2020-02-10Add context to note.Adin Scannell
PiperOrigin-RevId: 294300040
2020-02-10Move x86 state definition to its own file.Brad Burlage
PiperOrigin-RevId: 294271541
2020-02-05Add notes to relevant tests.Adin Scannell
These were out-of-band notes that can help provide additional context and simplify automated imports. PiperOrigin-RevId: 293525915
2020-01-29sentry: rename SetRSEQInterruptedIP to SetOldRSeqInterruptedIP for arm64Andrei Vagin
For amd64, this has been done on cl/288342928. PiperOrigin-RevId: 292170856
2020-01-27Update package locations.Adin Scannell
Because the abi will depend on the core types for marshalling (usermem, context, safemem, safecopy), these need to be flattened from the sentry directory. These packages contain no sentry-specific details. PiperOrigin-RevId: 291811289
2020-01-27Standardize on tools directory.Adin Scannell
PiperOrigin-RevId: 291745021
2020-01-14enable pkg/sentry/arch to support arm64 basicallylubinszARM
Signed-off-by: Bin Lu <bin.lu@arm.com> Change-Id: I9cce23db4e5caec82ce42b4970fdb7f7e8c08f1d COPYBARA_INTEGRATE_REVIEW=https://github.com/google/gvisor/pull/773 from lubinszARM:pr_arch_basic 3fe2fd8e6286766bbe489ef971dce204f924feba PiperOrigin-RevId: 289795569
2020-01-09New sync package.Ian Gudger
* Rename syncutil to sync. * Add aliases to sync types. * Replace existing usage of standard library sync package. This will make it easier to swap out synchronization primitives. For example, this will allow us to use primitives from github.com/sasha-s/go-deadlock to check for lock ordering violations. Updates #1472 PiperOrigin-RevId: 289033387
2020-01-06Implement rseq(2)Michael Pratt
PiperOrigin-RevId: 288342928
2019-12-04Remove TODO since we don't plan to support debug registersFabricio Voznika
PiperOrigin-RevId: 283828423
2019-10-16Reorder BUILD license and load functions in gvisor.Kevin Krakauer
PiperOrigin-RevId: 275139066
2019-09-23internal BUILD file cleanup.gVisor bot
PiperOrigin-RevId: 270680704
2019-07-21Add ARM64 support to pkg/sentry/loaderBin Lu
Signed-off-by: Bin Lu <bin.lu@arm.com>
2019-06-13Update canonical repository.Adin Scannell
This can be merged after: https://github.com/google/gvisor-website/pull/77 or https://github.com/google/gvisor-website/pull/78 PiperOrigin-RevId: 253132620
2019-04-29Change copyright notice to "The gVisor Authors"Michael Pratt
Based on the guidelines at https://opensource.google.com/docs/releasing/authors/. 1. $ rg -l "Google LLC" | xargs sed -i 's/Google LLC.*/The gVisor Authors./' 2. Manual fixup of "Google Inc" references. 3. Add AUTHORS file. Authors may request to be added to this file. 4. Point netstack AUTHORS to gVisor AUTHORS. Drop CONTRIBUTORS. Fixes #209 PiperOrigin-RevId: 245823212 Change-Id: I64530b24ad021a7d683137459cafc510f5ee1de9
2019-04-29Allow and document bug ids in gVisor codebase.Nicolas Lacasse
PiperOrigin-RevId: 245818639 Change-Id: I03703ef0fb9b6675955637b9fe2776204c545789
2019-04-25Perform explicit CPUID and FP state compatibility checks on restoreMichael Pratt
PiperOrigin-RevId: 245341004 Change-Id: Ic4d581039d034a8ae944b43e45e84eb2c3973657
2019-04-10Internal changeMichael Pratt
PiperOrigin-RevId: 242978508 Change-Id: I0ea59ac5ba1dd499e87c53f2e24709371048679b
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