| // Copyright 2016 The Fuchsia Authors |
| // |
| // Use of this source code is governed by a MIT-style |
| // license that can be found in the LICENSE file or at |
| // https://opensource.org/licenses/MIT |
| |
| #include <err.h> |
| #include <inttypes.h> |
| #include <trace.h> |
| |
| #include <kernel/mp.h> |
| #include <kernel/stats.h> |
| #include <kernel/vm/pmm.h> |
| #include <lib/heap.h> |
| #include <platform.h> |
| |
| #include <magenta/diagnostics.h> |
| #include <magenta/handle_owner.h> |
| #include <magenta/job_dispatcher.h> |
| #include <magenta/magenta.h> |
| #include <magenta/process_dispatcher.h> |
| #include <magenta/resource_dispatcher.h> |
| #include <magenta/thread_dispatcher.h> |
| #include <magenta/vm_address_region_dispatcher.h> |
| |
| #include <mxtl/ref_ptr.h> |
| |
| #include "syscalls_priv.h" |
| |
| #define LOCAL_TRACE 0 |
| |
| namespace { |
| |
| // Gathers the koids of a job's descendants. |
| class SimpleJobEnumerator final : public JobEnumerator { |
| public: |
| // If |job| is true, only records job koids; otherwise, only |
| // records process koids. |
| SimpleJobEnumerator(user_ptr<mx_koid_t> ptr, size_t max, bool jobs) |
| : jobs_(jobs), ptr_(ptr), max_(max) {} |
| |
| size_t get_avail() const { return avail_; } |
| size_t get_count() const { return count_; } |
| |
| private: |
| bool OnJob(JobDispatcher* job) override { |
| if (!jobs_) { |
| return true; |
| } |
| return RecordKoid(job->get_koid()); |
| } |
| |
| bool OnProcess(ProcessDispatcher* proc) override { |
| if (jobs_) { |
| return true; |
| } |
| return RecordKoid(proc->get_koid()); |
| } |
| |
| bool RecordKoid(mx_koid_t koid) { |
| avail_++; |
| if (count_ < max_) { |
| // TODO: accumulate batches and do fewer user copies |
| if (ptr_.copy_array_to_user(&koid, 1, count_) != MX_OK) { |
| return false; |
| } |
| count_++; |
| } |
| return true; |
| } |
| |
| const bool jobs_; |
| const user_ptr<mx_koid_t> ptr_; |
| const size_t max_; |
| |
| size_t count_ = 0; |
| size_t avail_ = 0; |
| }; |
| |
| mx_status_t single_record_result(user_ptr<void> _buffer, size_t buffer_size, |
| user_ptr<size_t> _actual, |
| user_ptr<size_t> _avail, |
| void* record_data, size_t record_size) { |
| size_t avail = 1; |
| size_t actual; |
| if (buffer_size >= record_size) { |
| if (_buffer.copy_array_to_user(record_data, record_size) != MX_OK) |
| return MX_ERR_INVALID_ARGS; |
| actual = 1; |
| } else { |
| actual = 0; |
| } |
| if (_actual && (_actual.copy_to_user(actual) != MX_OK)) |
| return MX_ERR_INVALID_ARGS; |
| if (_avail && (_avail.copy_to_user(avail) != MX_OK)) |
| return MX_ERR_INVALID_ARGS; |
| if (actual == 0) |
| return MX_ERR_BUFFER_TOO_SMALL; |
| return MX_OK; |
| } |
| |
| } // namespace |
| |
| // actual is an optional return parameter for the number of records returned |
| // avail is an optional return parameter for the number of records available |
| |
| // Topics which return a fixed number of records will return MX_ERR_BUFFER_TOO_SMALL |
| // if there is not enough buffer space provided. |
| // This allows for mx_object_get_info(handle, topic, &info, sizeof(info), NULL, NULL) |
| |
| mx_status_t sys_object_get_info(mx_handle_t handle, uint32_t topic, |
| user_ptr<void> _buffer, size_t buffer_size, |
| user_ptr<size_t> _actual, user_ptr<size_t> _avail) { |
| LTRACEF("handle %x topic %u\n", handle, topic); |
| |
| ProcessDispatcher* up = ProcessDispatcher::GetCurrent(); |
| |
| switch (topic) { |
| case MX_INFO_HANDLE_VALID: { |
| return up->IsHandleValid(handle) ? MX_OK : MX_ERR_BAD_HANDLE; |
| } |
| case MX_INFO_HANDLE_BASIC: { |
| // TODO(MG-458): Handle forward/backward compatibility issues |
| // with changes to the struct. |
| |
| mxtl::RefPtr<Dispatcher> dispatcher; |
| mx_rights_t rights; |
| auto status = up->GetDispatcherAndRights(handle, &dispatcher, &rights); |
| if (status != MX_OK) |
| return status; |
| |
| bool waitable = dispatcher->get_state_tracker() != nullptr; |
| |
| // build the info structure |
| mx_info_handle_basic_t info = { |
| .koid = dispatcher->get_koid(), |
| .rights = rights, |
| .type = dispatcher->get_type(), |
| .related_koid = dispatcher->get_related_koid(), |
| .props = waitable ? MX_OBJ_PROP_WAITABLE : MX_OBJ_PROP_NONE, |
| }; |
| |
| return single_record_result( |
| _buffer, buffer_size, _actual, _avail, &info, sizeof(info)); |
| } |
| case MX_INFO_PROCESS: { |
| // TODO(MG-458): Handle forward/backward compatibility issues |
| // with changes to the struct. |
| |
| // grab a reference to the dispatcher |
| mxtl::RefPtr<ProcessDispatcher> process; |
| auto error = up->GetDispatcherWithRights(handle, MX_RIGHT_READ, &process); |
| if (error < 0) |
| return error; |
| |
| // build the info structure |
| mx_info_process_t info = { }; |
| |
| auto err = process->GetInfo(&info); |
| if (err != MX_OK) |
| return err; |
| |
| return single_record_result( |
| _buffer, buffer_size, _actual, _avail, &info, sizeof(info)); |
| } |
| case MX_INFO_PROCESS_THREADS: { |
| // grab a reference to the dispatcher |
| mxtl::RefPtr<ProcessDispatcher> process; |
| auto error = up->GetDispatcherWithRights(handle, MX_RIGHT_ENUMERATE, &process); |
| if (error < 0) |
| return error; |
| |
| // Getting the list of threads is inherently racy (unless the |
| // caller has already stopped all threads, but that's not our |
| // concern). Still, we promise to either return all threads we know |
| // about at a particular point in time, or notify the caller that |
| // more threads exist than what we computed at that same point in |
| // time. |
| |
| mxtl::Array<mx_koid_t> threads; |
| mx_status_t status = process->GetThreads(&threads); |
| if (status != MX_OK) |
| return status; |
| size_t num_threads = threads.size(); |
| size_t num_space_for = buffer_size / sizeof(mx_koid_t); |
| size_t num_to_copy = MIN(num_threads, num_space_for); |
| |
| // Don't try to copy if there are no bytes to copy, as the "is |
| // user space" check may not handle (_buffer == NULL and len == 0). |
| if (num_to_copy && |
| _buffer.copy_array_to_user(threads.get(), sizeof(mx_koid_t) * num_to_copy) != MX_OK) |
| return MX_ERR_INVALID_ARGS; |
| if (_actual && (_actual.copy_to_user(num_to_copy) != MX_OK)) |
| return MX_ERR_INVALID_ARGS; |
| if (_avail && (_avail.copy_to_user(num_threads) != MX_OK)) |
| return MX_ERR_INVALID_ARGS; |
| return MX_OK; |
| } |
| case MX_INFO_JOB_CHILDREN: |
| case MX_INFO_JOB_PROCESSES: { |
| mxtl::RefPtr<JobDispatcher> job; |
| auto error = up->GetDispatcherWithRights(handle, MX_RIGHT_ENUMERATE, &job); |
| if (error < 0) |
| return error; |
| |
| size_t max = buffer_size / sizeof(mx_koid_t); |
| auto koids = _buffer.reinterpret<mx_koid_t>(); |
| SimpleJobEnumerator sje(koids, max, topic == MX_INFO_JOB_CHILDREN); |
| |
| // Don't recurse; we only want the job's direct children. |
| if (!job->EnumerateChildren(&sje, /* recurse */ false)) { |
| // SimpleJobEnumerator only returns false when it can't |
| // write to the user pointer. |
| return MX_ERR_INVALID_ARGS; |
| } |
| if (_actual && (_actual.copy_to_user(sje.get_count()) != MX_OK)) |
| return MX_ERR_INVALID_ARGS; |
| if (_avail && (_avail.copy_to_user(sje.get_avail()) != MX_OK)) |
| return MX_ERR_INVALID_ARGS; |
| return MX_OK; |
| } |
| case MX_INFO_THREAD: { |
| // TODO(MG-458): Handle forward/backward compatibility issues |
| // with changes to the struct. |
| |
| // grab a reference to the dispatcher |
| mxtl::RefPtr<ThreadDispatcher> thread; |
| auto error = up->GetDispatcherWithRights(handle, MX_RIGHT_READ, &thread); |
| if (error < 0) |
| return error; |
| |
| // build the info structure |
| mx_info_thread_t info = { }; |
| |
| auto err = thread->GetInfoForUserspace(&info); |
| if (err != MX_OK) |
| return err; |
| |
| return single_record_result( |
| _buffer, buffer_size, _actual, _avail, &info, sizeof(info)); |
| } |
| case MX_INFO_THREAD_EXCEPTION_REPORT: { |
| // TODO(MG-458): Handle forward/backward compatibility issues |
| // with changes to the struct. |
| |
| // grab a reference to the dispatcher |
| mxtl::RefPtr<ThreadDispatcher> thread; |
| auto error = up->GetDispatcherWithRights(handle, MX_RIGHT_READ, &thread); |
| if (error < 0) |
| return error; |
| |
| // build the info structure |
| mx_exception_report_t report = { }; |
| |
| auto err = thread->GetExceptionReport(&report); |
| if (err != MX_OK) |
| return err; |
| |
| return single_record_result( |
| _buffer, buffer_size, _actual, _avail, &report, sizeof(report)); |
| } |
| case MX_INFO_THREAD_STATS: { |
| // TODO(MG-458): Handle forward/backward compatibility issues |
| // with changes to the struct. |
| |
| // grab a reference to the dispatcher |
| mxtl::RefPtr<ThreadDispatcher> thread; |
| auto error = up->GetDispatcherWithRights(handle, MX_RIGHT_READ, &thread); |
| if (error < 0) |
| return error; |
| |
| // build the info structure |
| mx_info_thread_stats_t info = { }; |
| |
| auto err = thread->GetStatsForUserspace(&info); |
| if (err != MX_OK) |
| return err; |
| |
| return single_record_result( |
| _buffer, buffer_size, _actual, _avail, &info, sizeof(info)); |
| } |
| case MX_INFO_TASK_STATS: { |
| // TODO(MG-458): Handle forward/backward compatibility issues |
| // with changes to the struct. |
| |
| // Grab a reference to the dispatcher. Only supports processes for |
| // now, but could support jobs or threads in the future. |
| mxtl::RefPtr<ProcessDispatcher> process; |
| auto error = up->GetDispatcherWithRights(handle, MX_RIGHT_READ, |
| &process); |
| if (error < 0) |
| return error; |
| |
| // Build the info structure. |
| mx_info_task_stats_t info = {}; |
| |
| auto err = process->GetStats(&info); |
| if (err != MX_OK) |
| return err; |
| |
| return single_record_result( |
| _buffer, buffer_size, _actual, _avail, &info, sizeof(info)); |
| } |
| case MX_INFO_PROCESS_MAPS: { |
| mxtl::RefPtr<ProcessDispatcher> process; |
| mx_status_t status = |
| up->GetDispatcherWithRights(handle, MX_RIGHT_READ, &process); |
| if (status < 0) |
| return status; |
| if (process.get() == up) { |
| // Not safe to look at yourself: the user buffer will live |
| // inside the VmAspace we're examining, and we can't |
| // fault in the buffer's pages while the aspace lock is held. |
| return MX_ERR_ACCESS_DENIED; |
| } |
| |
| auto maps = _buffer.reinterpret<mx_info_maps_t>(); |
| size_t count = buffer_size / sizeof(mx_info_maps_t); |
| size_t avail = 0; |
| status = process->GetAspaceMaps(maps, count, &count, &avail); |
| |
| if (_actual && (_actual.copy_to_user(count) != MX_OK)) |
| return MX_ERR_INVALID_ARGS; |
| if (_avail && (_avail.copy_to_user(avail) != MX_OK)) |
| return MX_ERR_INVALID_ARGS; |
| return status; |
| } |
| case MX_INFO_PROCESS_VMOS: { |
| mxtl::RefPtr<ProcessDispatcher> process; |
| mx_status_t status = |
| up->GetDispatcherWithRights(handle, MX_RIGHT_READ, &process); |
| if (status < 0) |
| return status; |
| if (process.get() == up) { |
| // Not safe to look at yourself: the user buffer will live |
| // inside the VmAspace we're examining, and we can't |
| // fault in the buffer's pages while the aspace lock is held. |
| return MX_ERR_ACCESS_DENIED; |
| } |
| |
| auto vmos = _buffer.reinterpret<mx_info_vmo_t>(); |
| size_t count = buffer_size / sizeof(mx_info_vmo_t); |
| size_t avail = 0; |
| status = process->GetVmos(vmos, count, &count, &avail); |
| |
| if (_actual && (_actual.copy_to_user(count) != MX_OK)) |
| return MX_ERR_INVALID_ARGS; |
| if (_avail && (_avail.copy_to_user(avail) != MX_OK)) |
| return MX_ERR_INVALID_ARGS; |
| return status; |
| } |
| case MX_INFO_VMAR: { |
| mxtl::RefPtr<VmAddressRegionDispatcher> vmar; |
| mx_status_t status = up->GetDispatcher(handle, &vmar); |
| if (status < 0) |
| return status; |
| |
| auto real_vmar = vmar->vmar(); |
| mx_info_vmar_t info = { |
| .base = real_vmar->base(), |
| .len = real_vmar->size(), |
| }; |
| |
| return single_record_result( |
| _buffer, buffer_size, _actual, _avail, &info, sizeof(info)); |
| } |
| case MX_INFO_CPU_STATS: { |
| auto status = validate_resource(handle, MX_RSRC_KIND_ROOT); |
| if (status != MX_OK) |
| return status; |
| |
| // TODO: figure out a better handle to hang this off to and push this copy code into |
| // that dispatcher. |
| |
| size_t num_cpus = arch_max_num_cpus(); |
| size_t num_space_for = buffer_size / sizeof(mx_info_cpu_stats_t); |
| size_t num_to_copy = MIN(num_cpus, num_space_for); |
| |
| // build an alias to the output buffer that is in units of the cpu stat structure |
| user_ptr<mx_info_cpu_stats_t> cpu_buf(static_cast<mx_info_cpu_stats_t *>(_buffer.get())); |
| |
| for (unsigned int i = 0; i < static_cast<unsigned int>(num_to_copy); i++) { |
| const auto cpu = &percpu[i]; |
| |
| // copy the per cpu stats from the kernel percpu structure |
| // NOTE: it's technically racy to read this without grabbing a lock |
| // but since each field is wordwise any sane architecture will not |
| // return a corrupted value. |
| mx_info_cpu_stats_t stats = {}; |
| stats.cpu_number = i; |
| stats.flags = mp_is_cpu_online(i) ? MX_INFO_CPU_STATS_FLAG_ONLINE : 0; |
| |
| // account for idle time if a cpu is currently idle |
| { |
| AutoSpinLockIrqSave lock(&thread_lock); |
| |
| mx_time_t idle_time = cpu->stats.idle_time; |
| bool is_idle = mp_is_cpu_idle(i); |
| if (is_idle) { |
| idle_time += current_time() - percpu[i].idle_thread.last_started_running; |
| } |
| stats.idle_time = idle_time; |
| } |
| |
| stats.reschedules = cpu->stats.reschedules; |
| stats.context_switches = cpu->stats.context_switches; |
| stats.irq_preempts = cpu->stats.irq_preempts; |
| stats.preempts = cpu->stats.preempts; |
| stats.yields = cpu->stats.yields; |
| stats.ints = cpu->stats.interrupts; |
| stats.timer_ints = cpu->stats.timer_ints; |
| stats.timers = cpu->stats.timers; |
| stats.page_faults = cpu->stats.page_faults; |
| stats.exceptions = cpu->stats.exceptions; |
| stats.syscalls = cpu->stats.syscalls; |
| stats.reschedule_ipis = cpu->stats.reschedule_ipis; |
| stats.generic_ipis = cpu->stats.generic_ipis; |
| |
| // copy out one at a time |
| if (cpu_buf.copy_array_to_user(&stats, 1, i) != MX_OK) |
| return MX_ERR_INVALID_ARGS; |
| } |
| |
| if (_actual && (_actual.copy_to_user(num_to_copy) != MX_OK)) |
| return MX_ERR_INVALID_ARGS; |
| if (_avail && (_avail.copy_to_user(num_cpus) != MX_OK)) |
| return MX_ERR_INVALID_ARGS; |
| return MX_OK; |
| } |
| case MX_INFO_KMEM_STATS: { |
| auto status = validate_resource(handle, MX_RSRC_KIND_ROOT); |
| if (status != MX_OK) |
| return status; |
| |
| // TODO: figure out a better handle to hang this off to and push this copy code into |
| // that dispatcher. |
| |
| size_t state_count[_VM_PAGE_STATE_COUNT] = {}; |
| pmm_count_total_states(state_count); |
| |
| size_t total = 0; |
| for (int i = 0; i < _VM_PAGE_STATE_COUNT; i++) { |
| total += state_count[i]; |
| } |
| |
| size_t unused_size = 0; |
| size_t free_heap_bytes = 0; |
| heap_get_info(&unused_size, &free_heap_bytes); |
| |
| // Note that this intentionally uses uint64_t instead of |
| // size_t in case we ever have a 32-bit userspace but more |
| // than 4GB physical memory. |
| mx_info_kmem_stats_t stats = {}; |
| stats.total_bytes = total * PAGE_SIZE; |
| size_t other_bytes = stats.total_bytes; |
| |
| stats.free_bytes = state_count[VM_PAGE_STATE_FREE] * PAGE_SIZE; |
| other_bytes -= stats.free_bytes; |
| |
| stats.wired_bytes = state_count[VM_PAGE_STATE_WIRED] * PAGE_SIZE; |
| other_bytes -= stats.wired_bytes; |
| |
| stats.total_heap_bytes = state_count[VM_PAGE_STATE_HEAP] * PAGE_SIZE; |
| other_bytes -= stats.total_heap_bytes; |
| stats.free_heap_bytes = free_heap_bytes; |
| |
| stats.vmo_bytes = state_count[VM_PAGE_STATE_OBJECT] * PAGE_SIZE; |
| other_bytes -= stats.vmo_bytes; |
| |
| stats.mmu_overhead_bytes = state_count[VM_PAGE_STATE_MMU] * PAGE_SIZE; |
| other_bytes -= stats.mmu_overhead_bytes; |
| |
| // All other VM_PAGE_STATE_* counts get lumped into other_bytes. |
| stats.other_bytes = other_bytes; |
| |
| return single_record_result( |
| _buffer, buffer_size, _actual, _avail, &stats, sizeof(stats)); |
| } |
| case MX_INFO_RESOURCE: { |
| // grab a reference to the dispatcher |
| mxtl::RefPtr<ResourceDispatcher> resource; |
| auto error = up->GetDispatcherWithRights(handle, MX_RIGHT_NONE, &resource); |
| if (error < 0) |
| return error; |
| |
| // build the info structure |
| mx_info_resource_t info = {}; |
| info.kind = resource->get_kind(); |
| resource->get_range(&info.low, &info.high); |
| |
| return single_record_result( |
| _buffer, buffer_size, _actual, _avail, &info, sizeof(info)); |
| } |
| default: |
| return MX_ERR_NOT_SUPPORTED; |
| } |
| } |
| |
| mx_status_t sys_object_get_property(mx_handle_t handle_value, uint32_t property, |
| user_ptr<void> _value, size_t size) { |
| if (!_value) |
| return MX_ERR_INVALID_ARGS; |
| |
| auto up = ProcessDispatcher::GetCurrent(); |
| mxtl::RefPtr<Dispatcher> dispatcher; |
| auto status = up->GetDispatcherWithRights(handle_value, MX_RIGHT_GET_PROPERTY, &dispatcher); |
| if (status != MX_OK) |
| return status; |
| |
| switch (property) { |
| case MX_PROP_NUM_STATE_KINDS: { |
| if (size != sizeof(uint32_t)) |
| return MX_ERR_BUFFER_TOO_SMALL; |
| auto thread = DownCastDispatcher<ThreadDispatcher>(&dispatcher); |
| if (!thread) |
| return MX_ERR_WRONG_TYPE; |
| uint32_t value = thread->get_num_state_kinds(); |
| if (_value.reinterpret<uint32_t>().copy_to_user(value) != MX_OK) |
| return MX_ERR_INVALID_ARGS; |
| return MX_OK; |
| } |
| case MX_PROP_NAME: { |
| if (size < MX_MAX_NAME_LEN) |
| return MX_ERR_BUFFER_TOO_SMALL; |
| char name[MX_MAX_NAME_LEN]; |
| dispatcher->get_name(name); |
| if (_value.copy_array_to_user(name, MX_MAX_NAME_LEN) != MX_OK) |
| return MX_ERR_INVALID_ARGS; |
| return MX_OK; |
| } |
| case MX_PROP_PROCESS_DEBUG_ADDR: { |
| if (size < sizeof(uintptr_t)) |
| return MX_ERR_BUFFER_TOO_SMALL; |
| auto process = DownCastDispatcher<ProcessDispatcher>(&dispatcher); |
| if (!process) |
| return MX_ERR_WRONG_TYPE; |
| uintptr_t value = process->get_debug_addr(); |
| if (_value.reinterpret<uintptr_t>().copy_to_user(value) != MX_OK) |
| return MX_ERR_INVALID_ARGS; |
| return MX_OK; |
| } |
| case MX_PROP_PROCESS_VDSO_BASE_ADDRESS: { |
| if (size < sizeof(uintptr_t)) |
| return MX_ERR_BUFFER_TOO_SMALL; |
| auto process = DownCastDispatcher<ProcessDispatcher>(&dispatcher); |
| if (!process) |
| return MX_ERR_WRONG_TYPE; |
| uintptr_t value = process->aspace()->vdso_base_address(); |
| return _value.reinterpret<uintptr_t>().copy_to_user(value); |
| } |
| case MX_PROP_JOB_IMPORTANCE: { |
| if (size != sizeof(mx_job_importance_t)) |
| return MX_ERR_BUFFER_TOO_SMALL; |
| auto job = DownCastDispatcher<JobDispatcher>(&dispatcher); |
| if (!job) |
| return MX_ERR_WRONG_TYPE; |
| mx_job_importance_t value; |
| mx_status_t status = job->get_importance(&value); |
| if (status != MX_OK) { |
| // Usually a problem resolving inherited importance, |
| // like racing with task death. |
| return status; |
| } |
| if (_value.reinterpret<mx_job_importance_t>() |
| .copy_to_user(value) != MX_OK) { |
| return MX_ERR_INVALID_ARGS; |
| } |
| return MX_OK; |
| } |
| default: |
| return MX_ERR_INVALID_ARGS; |
| } |
| |
| __UNREACHABLE; |
| } |
| |
| static mx_status_t is_current_thread(mxtl::RefPtr<Dispatcher>* dispatcher) { |
| auto thread_dispatcher = DownCastDispatcher<ThreadDispatcher>(dispatcher); |
| if (!thread_dispatcher) |
| return MX_ERR_WRONG_TYPE; |
| if (thread_dispatcher.get() != ThreadDispatcher::GetCurrent()) |
| return MX_ERR_ACCESS_DENIED; |
| return MX_OK; |
| } |
| |
| mx_status_t sys_object_set_property(mx_handle_t handle_value, uint32_t property, |
| user_ptr<const void> _value, size_t size) { |
| if (!_value) |
| return MX_ERR_INVALID_ARGS; |
| |
| auto up = ProcessDispatcher::GetCurrent(); |
| mxtl::RefPtr<Dispatcher> dispatcher; |
| |
| auto status = up->GetDispatcherWithRights(handle_value, MX_RIGHT_SET_PROPERTY, &dispatcher); |
| if (status != MX_OK) |
| return status; |
| |
| switch (property) { |
| case MX_PROP_NAME: { |
| if (size >= MX_MAX_NAME_LEN) |
| size = MX_MAX_NAME_LEN - 1; |
| char name[MX_MAX_NAME_LEN - 1]; |
| if (_value.copy_array_from_user(name, size) != MX_OK) |
| return MX_ERR_INVALID_ARGS; |
| return dispatcher->set_name(name, size); |
| } |
| #if ARCH_X86_64 |
| case MX_PROP_REGISTER_FS: { |
| if (size < sizeof(uintptr_t)) |
| return MX_ERR_BUFFER_TOO_SMALL; |
| mx_status_t status = is_current_thread(&dispatcher); |
| if (status != MX_OK) |
| return status; |
| uintptr_t addr; |
| if (_value.reinterpret<const uintptr_t>().copy_from_user(&addr) != MX_OK) |
| return MX_ERR_INVALID_ARGS; |
| if (!x86_is_vaddr_canonical(addr)) |
| return MX_ERR_INVALID_ARGS; |
| write_msr(X86_MSR_IA32_FS_BASE, addr); |
| return MX_OK; |
| } |
| #endif |
| case MX_PROP_PROCESS_DEBUG_ADDR: { |
| if (size < sizeof(uintptr_t)) |
| return MX_ERR_BUFFER_TOO_SMALL; |
| auto process = DownCastDispatcher<ProcessDispatcher>(&dispatcher); |
| if (!process) |
| return MX_ERR_WRONG_TYPE; |
| uintptr_t value = 0; |
| if (_value.reinterpret<const uintptr_t>().copy_from_user(&value) != MX_OK) |
| return MX_ERR_INVALID_ARGS; |
| return process->set_debug_addr(value); |
| } |
| case MX_PROP_JOB_IMPORTANCE: { |
| if (size != sizeof(mx_job_importance_t)) |
| return MX_ERR_BUFFER_TOO_SMALL; |
| auto job = DownCastDispatcher<JobDispatcher>(&dispatcher); |
| if (!job) |
| return MX_ERR_WRONG_TYPE; |
| int32_t value = 0; |
| if (_value.reinterpret<const mx_job_importance_t>() |
| .copy_from_user(&value) != MX_OK) { |
| return MX_ERR_INVALID_ARGS; |
| } |
| return job->set_importance( |
| static_cast<mx_job_importance_t>(value)); |
| } |
| } |
| |
| return MX_ERR_INVALID_ARGS; |
| } |
| |
| mx_status_t sys_object_signal(mx_handle_t handle_value, uint32_t clear_mask, uint32_t set_mask) { |
| LTRACEF("handle %x\n", handle_value); |
| |
| auto up = ProcessDispatcher::GetCurrent(); |
| mxtl::RefPtr<Dispatcher> dispatcher; |
| |
| auto status = up->GetDispatcherWithRights(handle_value, MX_RIGHT_SIGNAL, &dispatcher); |
| if (status != MX_OK) |
| return status; |
| |
| return dispatcher->user_signal(clear_mask, set_mask, false); |
| } |
| |
| mx_status_t sys_object_signal_peer(mx_handle_t handle_value, uint32_t clear_mask, uint32_t set_mask) { |
| LTRACEF("handle %x\n", handle_value); |
| |
| auto up = ProcessDispatcher::GetCurrent(); |
| mxtl::RefPtr<Dispatcher> dispatcher; |
| |
| auto status = up->GetDispatcherWithRights(handle_value, MX_RIGHT_SIGNAL_PEER, &dispatcher); |
| if (status != MX_OK) |
| return status; |
| |
| return dispatcher->user_signal(clear_mask, set_mask, true); |
| } |
| |
| // Given a kernel object with children objects, obtain a handle to the |
| // child specified by the provided kernel object id. |
| // |
| // MX_HANDLE_INVALID is currently treated as a "magic" handle used to |
| // obtain a process from "the system". |
| mx_status_t sys_object_get_child(mx_handle_t handle, uint64_t koid, mx_rights_t rights, |
| user_ptr<mx_handle_t> _out) { |
| auto up = ProcessDispatcher::GetCurrent(); |
| |
| if (handle == MX_HANDLE_INVALID) { |
| //TODO: lookup process from job instead of treating INVALID as magic |
| const auto kDebugRights = |
| MX_RIGHT_READ | MX_RIGHT_WRITE | MX_RIGHT_DUPLICATE | MX_RIGHT_TRANSFER | |
| MX_RIGHT_GET_PROPERTY | MX_RIGHT_SET_PROPERTY | MX_RIGHT_ENUMERATE; |
| |
| if (rights == MX_RIGHT_SAME_RIGHTS) { |
| rights = kDebugRights; |
| } else if ((kDebugRights & rights) != rights) { |
| return MX_ERR_ACCESS_DENIED; |
| } |
| |
| auto process = ProcessDispatcher::LookupProcessById(koid); |
| if (!process) |
| return MX_ERR_NOT_FOUND; |
| |
| HandleOwner process_h( |
| MakeHandle(mxtl::RefPtr<Dispatcher>(process.get()), rights)); |
| if (!process_h) |
| return MX_ERR_NO_MEMORY; |
| |
| if (_out.copy_to_user(up->MapHandleToValue(process_h))) |
| return MX_ERR_INVALID_ARGS; |
| up->AddHandle(mxtl::move(process_h)); |
| return MX_OK; |
| } |
| |
| mxtl::RefPtr<Dispatcher> dispatcher; |
| uint32_t parent_rights; |
| auto status = up->GetDispatcherAndRights(handle, &dispatcher, &parent_rights); |
| if (status != MX_OK) |
| return status; |
| |
| if (!(parent_rights & MX_RIGHT_ENUMERATE)) |
| return MX_ERR_ACCESS_DENIED; |
| |
| if (rights == MX_RIGHT_SAME_RIGHTS) { |
| rights = parent_rights; |
| } else if ((parent_rights & rights) != rights) { |
| return MX_ERR_ACCESS_DENIED; |
| } |
| |
| auto process = DownCastDispatcher<ProcessDispatcher>(&dispatcher); |
| if (process) { |
| auto thread = process->LookupThreadById(koid); |
| if (!thread) |
| return MX_ERR_NOT_FOUND; |
| HandleOwner thread_h(MakeHandle(thread, rights)); |
| if (!thread_h) |
| return MX_ERR_NO_MEMORY; |
| |
| if (_out.copy_to_user(up->MapHandleToValue(thread_h)) != MX_OK) |
| return MX_ERR_INVALID_ARGS; |
| up->AddHandle(mxtl::move(thread_h)); |
| return MX_OK; |
| } |
| |
| auto job = DownCastDispatcher<JobDispatcher>(&dispatcher); |
| if (job) { |
| auto child = job->LookupJobById(koid); |
| if (child) { |
| HandleOwner child_h(MakeHandle(child, rights)); |
| if (!child_h) |
| return MX_ERR_NO_MEMORY; |
| |
| if (_out.copy_to_user(up->MapHandleToValue(child_h)) != MX_OK) |
| return MX_ERR_INVALID_ARGS; |
| up->AddHandle(mxtl::move(child_h)); |
| return MX_OK; |
| } |
| auto proc = job->LookupProcessById(koid); |
| if (proc) { |
| HandleOwner child_h(MakeHandle(proc, rights)); |
| if (!child_h) |
| return MX_ERR_NO_MEMORY; |
| |
| if (_out.copy_to_user(up->MapHandleToValue(child_h)) != MX_OK) |
| return MX_ERR_INVALID_ARGS; |
| up->AddHandle(mxtl::move(child_h)); |
| return MX_OK; |
| } |
| return MX_ERR_NOT_FOUND; |
| } |
| |
| return MX_ERR_WRONG_TYPE; |
| } |
| |
| |
| mx_status_t sys_object_set_cookie(mx_handle_t handle, mx_handle_t hscope, uint64_t cookie) { |
| auto up = ProcessDispatcher::GetCurrent(); |
| |
| mx_koid_t scope = up->GetKoidForHandle(hscope); |
| if (scope == MX_KOID_INVALID) |
| return MX_ERR_BAD_HANDLE; |
| |
| mxtl::RefPtr<Dispatcher> dispatcher; |
| auto status = up->GetDispatcher(handle, &dispatcher); |
| if (status != MX_OK) |
| return status; |
| |
| StateTracker* st = dispatcher->get_state_tracker(); |
| if (st == nullptr) |
| return MX_ERR_NOT_SUPPORTED; |
| |
| return st->SetCookie(dispatcher->get_cookie_jar(), scope, cookie); |
| } |
| |
| mx_status_t sys_object_get_cookie(mx_handle_t handle, mx_handle_t hscope, user_ptr<uint64_t> _cookie) { |
| auto up = ProcessDispatcher::GetCurrent(); |
| |
| mx_koid_t scope = up->GetKoidForHandle(hscope); |
| if (scope == MX_KOID_INVALID) |
| return MX_ERR_BAD_HANDLE; |
| |
| mxtl::RefPtr<Dispatcher> dispatcher; |
| auto status = up->GetDispatcher(handle, &dispatcher); |
| if (status != MX_OK) |
| return status; |
| |
| StateTracker* st = dispatcher->get_state_tracker(); |
| if (st == nullptr) |
| return MX_ERR_NOT_SUPPORTED; |
| |
| uint64_t cookie; |
| status = st->GetCookie(dispatcher->get_cookie_jar(), scope, &cookie); |
| if (status != MX_OK) |
| return status; |
| |
| if (_cookie.copy_to_user(cookie) != MX_OK) |
| return MX_ERR_INVALID_ARGS; |
| |
| return MX_OK; |
| } |
