Merge remote-tracking branch 'origin/master' into merging

README.md

@@ -1,6 +1,6 @@
 # zCore
 
-[![Actions Status](https://github.com/rcore-os/zCore/workflows/CI/badge.svg)](https://github.com/rcore-os/zCore/actions)
+[![CI](https://github.com/rcore-os/zCore/workflows/CI/badge.svg?branch=master)](https://github.com/rcore-os/zCore/actions)
 [![Docs](https://img.shields.io/badge/docs-alpha-blue)](https://rcore-os.github.io/zCore/zircon_object/)
 [![Coverage Status](https://coveralls.io/repos/github/rcore-os/zCore/badge.svg?branch=master)](https://coveralls.io/github/rcore-os/zCore?branch=master)
 
@@ -14,10 +14,18 @@ Reimplement [Zircon][zircon] microkernel in safe Rust as a userspace program!
 
 ## Getting started
 
+Environments：
+
+* [Rust toolchain](http://rustup.rs)
+* [QEMU](https://www.qemu.org)
+* [Git LFS](https://git-lfs.github.com)
+
+Clone repo and pull prebuilt fuchsia images:
+
 ```sh
-git clone https://github.com/rcore-os/zCore
+git clone https://github.com/rcore-os/zCore --recursive
-git lfs pull
 cd zCore
+git lfs pull
 ```
 
 Prepare Alpine Linux rootfs:
@@ -32,7 +40,7 @@ Run native Linux program (Busybox):
 cargo run --release -p linux-loader /bin/busybox [args]
 ```
 
-Run native Zircon program (userboot):
+Run native Zircon program (shell):
 
 ```sh
 cargo run --release -p zircon-loader prebuilt/zircon

kernel-hal-bare/src/arch/x86_64/mod.rs

@@ -340,17 +340,36 @@ fn vdso_constants() -> VdsoConstants {
 }
 
 /// Initialize the HAL.
-pub fn init() {
+pub fn init(config: Config) {
     timer_init();
     interrupt::init();
     COM1.lock().init();
     unsafe {
         // enable global page
         Cr4::update(|f| f.insert(Cr4Flags::PAGE_GLOBAL));
+        // store config
+        CONFIG = config;
     }
 }
 
+/// Configuration of HAL.
+pub struct Config {
+    pub acpi_rsdp: u64,
+    pub smbios: u64,
+}
+
 #[export_name = "fetch_fault_vaddr"]
 pub fn fetch_fault_vaddr() -> VirtAddr {
     Cr2::read().as_u64() as _
 }
+
+/// Get physical address of `acpi_rsdp` and `smbios` on x86_64.
+#[export_name = "hal_pc_firmware_tables"]
+pub fn pc_firmware_tables() -> (u64, u64) {
+    unsafe { (CONFIG.acpi_rsdp, CONFIG.smbios) }
+}
+
+static mut CONFIG: Config = Config {
+    acpi_rsdp: 0,
+    smbios: 0,
+};

kernel-hal-bare/src/lib.rs

@@ -171,10 +171,11 @@ pub fn frame_copy(src: PhysAddr, target: PhysAddr) {
 
 /// Zero `target` frame.
 #[export_name = "hal_frame_zero"]
-pub fn frame_zero(target: PhysAddr) {
+pub fn frame_zero_in_range(target: PhysAddr, start: usize, end: usize) {
+    assert!(start < PAGE_SIZE && end <= PAGE_SIZE);
     trace!("frame_zero: {:#x}", target);
     unsafe {
-        core::ptr::write_bytes(phys_to_virt(target) as *mut u8, 0, PAGE_SIZE);
+        core::ptr::write_bytes(phys_to_virt(target + start) as *mut u8, 0, end - start);
     }
 }
 
@@ -211,11 +212,11 @@ pub fn timer_tick() {
 }
 
 /// Initialize the HAL.
-pub fn init() {
+pub fn init(config: Config) {
     unsafe {
         trapframe::init();
     }
-    arch::init();
+    arch::init(config);
 }
 
 #[cfg(test)]

kernel-hal/src/dummy.rs

@@ -209,7 +209,7 @@ pub fn frame_copy(_src: PhysAddr, _target: PhysAddr) {
 /// Zero `target` frame.
 #[linkage = "weak"]
 #[export_name = "hal_frame_zero"]
-pub fn frame_zero(_target: PhysAddr) {
+pub fn frame_zero_in_range(_target: PhysAddr, _start: usize, _end: usize) {
     unimplemented!()
 }
 
@@ -282,3 +282,10 @@ pub fn vdso_constants() -> VdsoConstants {
 pub fn fetch_fault_vaddr() -> VirtAddr {
     unimplemented!()
 }
+
+/// Get physical address of `acpi_rsdp` and `smbios` on x86_64.
+#[linkage = "weak"]
+#[export_name = "hal_pc_firmware_tables"]
+pub fn pc_firmware_tables() -> (u64, u64) {
+    unimplemented!()
+}

rboot

@@ -1 +1 @@
-Subproject commit 5ab7648d1401f56255d3d90fb160b6b7c13c879a
+Subproject commit 228ef7902486b8c5e5a69272b1f0f1dcf962c098

zCore/src/main.rs

@@ -29,7 +29,10 @@ pub extern "C" fn _start(boot_info: &BootInfo) -> ! {
     #[cfg(feature = "graphic")]
     init_framebuffer(boot_info);
     info!("{:#x?}", boot_info);
-    kernel_hal_bare::init();
+    kernel_hal_bare::init(kernel_hal_bare::Config {
+        acpi_rsdp: boot_info.acpi2_rsdp_addr,
+        smbios: boot_info.smbios_addr,
+    });
 
     let zbi_data = unsafe {
         core::slice::from_raw_parts(

zircon-loader/src/kcounter.rs

@@ -41,7 +41,7 @@ pub fn create_kcounter_vmo() -> (Arc<VmObject>, Arc<VmObject>) {
             kcounters_arena_end as usize / PAGE_SIZE,
             "all kcounters must in the same page"
         );
-        unsafe { VmObject::new_physical(paddr, 1) }
+        VmObject::new_physical(paddr, 1)
     };
     kcounters_vmo.set_name("counters/arena");
     (counter_name_vmo, kcounters_vmo)

zircon-loader/src/lib.rs

@@ -12,14 +12,7 @@ use {
     alloc::{boxed::Box, sync::Arc, vec::Vec},
     kernel_hal::GeneralRegs,
     xmas_elf::ElfFile,
-    zircon_object::{
+    zircon_object::{ipc::*, object::*, task::*, util::elf_loader::*, vm::*, resource::*},
-        ipc::*,
-        object::*,
-        resource::{Resource, ResourceFlags, ResourceKind},
-        task::*,
-        util::elf_loader::*,
-        vm::*,
-    },
     zircon_syscall::Syscall,
 };
 
@@ -56,7 +49,13 @@ pub fn run_userboot(images: &Images<impl AsRef<[u8]>>, cmdline: &str) -> Arc<Pro
     let job = Job::root();
     let proc = Process::create(&job, "proc", 0).unwrap();
     let thread = Thread::create(&proc, "thread", 0).unwrap();
-    let resource = Resource::create("root", ResourceKind::ROOT, 0, 0, ResourceFlags::empty());
+    let resource = Resource::create(
+        "root",
+        ResourceKind::ROOT,
+        0,
+        0x1_0000_0000,
+        ResourceFlags::empty(),
+    );
     let vmar = proc.vmar();
 
     // userboot

zircon-object/src/ipc/fifo.rs

@@ -104,15 +104,20 @@ impl Fifo {
         let count_size = count * elem_size;
         assert_eq!(data.len(), count_size);
 
-        let peer = self.peer.upgrade().ok_or(ZxError::PEER_CLOSED)?;
+        let peer = self.peer.upgrade();
         let mut recv_queue = self.recv_queue.lock();
         if recv_queue.is_empty() {
+            if peer.is_none() {
+                return Err(ZxError::PEER_CLOSED);
+            }
             return Err(ZxError::SHOULD_WAIT);
         }
         let read_size = count_size.min(recv_queue.len());
         if recv_queue.len() == self.capacity() {
+            if let Some(peer) = peer {
                 peer.base.signal_set(Signal::WRITABLE);
             }
+        }
         for (i, x) in recv_queue.drain(..read_size).enumerate() {
             data[i] = x;
         }

zircon-object/src/object/signal.rs

@@ -11,6 +11,7 @@ bitflags! {
         const SIGNALED                      = 1 << 3;
         const HANDLE_CLOSED                 = 1 << 23;
 
+        const KERNEL_ALL                    = 0xff_ffff;
         const USER_ALL                      = 0xff << 24;
 
         const CLOCK_STARTED                 = 1 << 4;

zircon-object/src/resource.rs

@@ -45,11 +45,7 @@ impl Resource {
         flags: ResourceFlags,
     ) -> Arc<Self> {
         Arc::new(Resource {
-            base: {
+            base: KObjectBase::with_name(name),
-                let base = KObjectBase::new();
-                base.set_name(name);
-                base
-            },
             kind,
             addr,
             len,
@@ -72,9 +68,6 @@ impl Resource {
         len: usize,
     ) -> ZxResult {
         self.validate(kind)?;
-        if self.kind == ResourceKind::MMIO {
-            unimplemented!()
-        }
         if addr >= self.addr && (addr + len) <= (self.addr + self.len) {
             Ok(())
         } else {

zircon-object/src/task/job.rs

@@ -185,20 +185,14 @@ impl Job {
         self.exceptionate.clone()
     }
 
-    pub fn enumerate_process(&self, mut f: impl FnMut(KoID) -> bool) {
+    /// Get KoIDs of Processes.
-        self.inner
+    pub fn process_ids(&self) -> Vec<KoID> {
-            .lock()
+        self.inner.lock().processes.iter().map(|p| p.id()).collect()
-            .processes
-            .iter()
-            .find(|child| !f(child.id()));
     }
 
-    pub fn enumerate_children(&self, mut f: impl FnMut(KoID) -> bool) {
+    /// Get KoIDs of children Jobs.
-        self.inner
+    pub fn children_ids(&self) -> Vec<KoID> {
-            .lock()
+        self.inner.lock().children.iter().map(|j| j.id()).collect()
-            .children
-            .iter()
-            .find(|child| !f(child.id()));
     }
 }
 

zircon-object/src/task/process.rs

@@ -1,5 +1,5 @@
 use {
-    super::{exception::*, job::Job, job_policy::*, resource::*, thread::Thread, *},
+    super::{exception::*, job::Job, job_policy::*, thread::Thread, *},
     crate::{object::*, signal::Futex, vm::*},
     alloc::{boxed::Box, collections::BTreeMap, sync::Arc, vec::Vec},
     core::{any::Any, sync::atomic::AtomicI32},
@@ -341,16 +341,6 @@ impl Process {
         Ok(object)
     }
 
-    /// Try to get Resource and validate it
-    pub fn validate_resource(&self, handle_value: HandleValue, kind: ResourceKind) -> ZxResult {
-        let handle = self.get_handle(handle_value)?;
-        let object = handle
-            .object
-            .downcast_arc::<Resource>()
-            .map_err(|_| ZxError::WRONG_TYPE)?;
-        object.validate(kind)
-    }
-
     pub fn get_handle_info(&self, handle_value: HandleValue) -> ZxResult<HandleBasicInfo> {
         let handle = self.get_handle(handle_value)?;
         Ok(handle.get_info())
@@ -424,12 +414,9 @@ impl Process {
         self.exceptionate.clone()
     }
 
-    pub fn enumerate_thread(&self, mut f: impl FnMut(KoID) -> bool) {
+    /// Get KoIDs of Threads.
-        self.inner
+    pub fn thread_ids(&self) -> Vec<KoID> {
-            .lock()
+        self.inner.lock().threads.iter().map(|t| t.id()).collect()
-            .threads
-            .iter()
-            .find(|child| !f(child.id()));
     }
 }
 

zircon-object/src/task/thread.rs

@@ -172,7 +172,7 @@ impl Thread {
             context.general.rsp = stack;
             context.general.rdi = arg1;
             context.general.rsi = arg2;
-            context.general.rflags |= 0x202;
+            context.general.rflags |= 0x3202;
             context.vector.fcw = 0x37f;
             inner.state = ThreadState::Running;
             self.base.signal_set(Signal::THREAD_RUNNING);
@@ -191,7 +191,7 @@ impl Thread {
             let mut inner = self.inner.lock();
             let context = inner.context.as_mut().ok_or(ZxError::BAD_STATE)?;
             context.general = regs;
-            context.general.rflags |= 0x202;
+            context.general.rflags |= 0x3202;
             context.vector.fcw = 0x37f;
             inner.state = ThreadState::Running;
             self.base.signal_set(Signal::THREAD_RUNNING);

zircon-object/src/vm/vmar.rs

@@ -1,7 +1,7 @@
 use core::sync::atomic::*;
 use {
-    super::*, crate::object::*, alloc::collections::VecDeque, alloc::sync::Arc, alloc::vec::Vec,
+    super::*, crate::object::*, alloc::sync::Arc, alloc::vec::Vec, bitflags::bitflags,
-    bitflags::bitflags, kernel_hal::PageTable, spin::Mutex,
+    kernel_hal::PageTable, spin::Mutex,
 };
 
 bitflags! {
@@ -449,28 +449,20 @@ impl VmAddressRegion {
         Err(ZxError::NOT_FOUND)
     }
 
-    pub fn get_task_stats(&self) -> ZxInfoTaskStats {
+    fn for_each_mapping(&self, f: &mut impl FnMut(&Arc<VmMapping>)) {
-        let mut task_stats = ZxInfoTaskStats::default();
+        let guard = self.inner.lock();
-        let mut list = VecDeque::new();
+        let inner = guard.as_ref().unwrap();
-        self.inner
+        for map in inner.mappings.iter() {
-            .lock()
+            f(map);
-            .as_ref()
-            .unwrap()
-            .children
-            .iter()
-            .for_each(|child| {
-                list.push_back(child.clone());
-            });
-        while let Some(vmar) = list.pop_front() {
-            let vmar_inner = vmar.inner.lock();
-            let inner = vmar_inner.as_ref().unwrap();
-            inner.children.iter().for_each(|child| {
-                list.push_back(child.clone());
-            });
-            inner.mappings.iter().for_each(|map| {
-                map.fill_in_task_status(&mut task_stats);
-            });
         }
+        for child in inner.children.iter() {
+            child.for_each_mapping(f);
+        }
+    }
+
+    pub fn get_task_stats(&self) -> TaskStatsInfo {
+        let mut task_stats = TaskStatsInfo::default();
+        self.for_each_mapping(&mut |map| map.fill_in_task_status(&mut task_stats));
         task_stats
     }
 
@@ -514,7 +506,7 @@ struct VmMappingInner {
 
 #[repr(C)]
 #[derive(Default)]
-pub struct ZxInfoTaskStats {
+pub struct TaskStatsInfo {
     mapped_bytes: u64,
     private_bytes: u64,
     shared_bytes: u64,
@@ -582,7 +574,7 @@ impl VmMapping {
             .unmap_from(&mut page_table, inner.addr, inner.vmo_offset, inner.size);
     }
 
-    fn fill_in_task_status(&self, task_stats: &mut ZxInfoTaskStats) {
+    fn fill_in_task_status(&self, task_stats: &mut TaskStatsInfo) {
         let inner = self.inner.lock();
         let start_idx = inner.vmo_offset / PAGE_SIZE;
         let end_idx = start_idx + inner.size / PAGE_SIZE;

zircon-object/src/vm/vmo/mod.rs

@@ -74,7 +74,7 @@ pub trait VMObjectTrait: Sync + Send {
 
     fn remove_mapping(&self, mapping: Weak<VmMapping>);
 
-    fn complete_info(&self, info: &mut ZxInfoVmo);
+    fn complete_info(&self, info: &mut VmoInfo);
 
     fn get_cache_policy(&self) -> CachePolicy;
 
@@ -99,6 +99,7 @@ pub trait VMObjectTrait: Sync + Send {
     fn is_paged(&self) -> bool {
         false
     }
+    fn zero(&self, offset: usize, len: usize) -> ZxResult;
 }
 
 pub struct VmObject {
@@ -132,12 +133,8 @@ impl VmObject {
     }
 
     /// Create a new VMO representing a piece of contiguous physical memory.
-    ///
-    /// # Safety
-    ///
     /// You must ensure nobody has the ownership of this piece of memory yet.
-    #[allow(unsafe_code)]
+    pub fn new_physical(paddr: PhysAddr, pages: usize) -> Arc<Self> {
-    pub unsafe fn new_physical(paddr: PhysAddr, pages: usize) -> Arc<Self> {
         Arc::new(VmObject {
             base: KObjectBase::with_signal(Signal::VMO_ZERO_CHILDREN),
             parent: Mutex::new(Default::default()),
@@ -247,8 +244,8 @@ impl VmObject {
     }
 
     /// Get information of this VMO.
-    pub fn get_info(&self) -> ZxInfoVmo {
+    pub fn get_info(&self) -> VmoInfo {
-        let mut ret = ZxInfoVmo {
+        let mut ret = VmoInfo {
             koid: self.base.id,
             name: {
                 let mut arr = [0u8; 32];
@@ -313,6 +310,14 @@ impl Drop for VmObject {
             let mut children = parent.children.lock();
             children.append(&mut my_children);
             children.retain(|c| c.strong_count() != 0);
+            children.iter().for_each(|child| {
+                let arc_child = child.upgrade().unwrap();
+                let mut locked_children = arc_child.children.lock();
+                locked_children.retain(|c| c.strong_count() != 0);
+                if locked_children.is_empty() {
+                    arc_child.base.signal_set(Signal::VMO_ZERO_CHILDREN);
+                }
+            });
             // Non-zero to zero?
             if children.is_empty() {
                 parent.base.signal_set(Signal::VMO_ZERO_CHILDREN);
@@ -324,7 +329,7 @@ impl Drop for VmObject {
 /// Describes a VMO.
 #[repr(C)]
 #[derive(Default)]
-pub struct ZxInfoVmo {
+pub struct VmoInfo {
     /// The koid of this VMO.
     koid: KoID,
     /// The name of this VMO.

zircon-object/src/vm/vmo/paged.rs

@@ -276,6 +276,32 @@ impl VMObjectTrait for VMObjectPaged {
         })
     }
 
+    fn zero(&self, offset: usize, len: usize) -> ZxResult {
+        if offset + len > self.inner.lock().size {
+            return Err(ZxError::OUT_OF_RANGE);
+        }
+        let iter = BlockIter {
+            begin: offset,
+            end: offset + len,
+            block_size_log2: 12,
+        };
+        let mut unwanted = VecDeque::new();
+        for block in iter {
+            //let paddr = self.commit_page(block.block, MMUFlags::READ)?;
+            if block.len() == PAGE_SIZE {
+                let _ = self.commit_page(block.block, MMUFlags::WRITE)?;
+                unwanted.push_back(block.block);
+                self.inner.lock().frames.remove(&block.block);
+            } else if self.committed_pages_in_range(block.block, block.block + 1) != 0 {
+                // check whether this page is initialized, otherwise nothing should be done
+                let paddr = self.commit_page(block.block, MMUFlags::WRITE)?;
+                kernel_hal::frame_zero_in_range(paddr, block.begin, block.end);
+            }
+        }
+        self.inner.lock().release_unwanted_pages(unwanted);
+        Ok(())
+    }
+
     fn len(&self) -> usize {
         self.inner.lock().size
     }
@@ -317,8 +343,12 @@ impl VMObjectTrait for VMObjectPaged {
             return res;
         }
         let mut inner = self.inner.lock();
-        // non-slice child VMOs do not support decommit.
+        if inner.type_.is_slice() {
-        if inner.parent.is_some() {
+            let parent_offset = offset + inner.parent_offset;
+            return inner.parent.as_ref().unwrap().decommit(parent_offset, len);
+        }
+        let check = inner.parent.is_none();
+        if !check {
             return Err(ZxError::NOT_SUPPORTED);
         }
         let start_page = offset / PAGE_SIZE;
@@ -398,7 +428,7 @@ impl VMObjectTrait for VMObjectPaged {
             .drain_filter(|x| x.strong_count() == 0 || Weak::ptr_eq(x, &mapping));
     }
 
-    fn complete_info(&self, info: &mut ZxInfoVmo) {
+    fn complete_info(&self, info: &mut VmoInfo) {
         info.flags |= VmoInfoFlags::TYPE_PAGED;
         self.inner.lock().complete_info(info);
     }
@@ -563,6 +593,15 @@ impl VMObjectPaged {
             return res;
         }
         let mut inner = self.inner.lock();
+        if inner.type_.is_slice() {
+            assert!((inner.parent_limit - inner.parent_offset) / PAGE_SIZE > page_idx);
+            let parent_idx = page_idx + inner.parent_offset / PAGE_SIZE;
+            return inner.parent.as_ref().unwrap().commit_page_internal(
+                parent_idx,
+                flags,
+                &inner.self_ref,
+            );
+        }
         // special case
         let no_parent = inner.parent.is_none();
         let no_frame = !inner.frames.contains_key(&page_idx);
@@ -580,7 +619,7 @@ impl VMObjectPaged {
                 }
                 // lazy allocate zero frame
                 let target_frame = PhysFrame::alloc().ok_or(ZxError::NO_MEMORY)?;
-                kernel_hal::frame_zero(target_frame.addr());
+                kernel_hal::frame_zero_in_range(target_frame.addr(), 0, PAGE_SIZE);
                 if out_of_range {
                     // can never be a hidden vmo
                     assert!(!inner.type_.is_hidden());
@@ -735,7 +774,7 @@ impl VMObjectPaged {
         let mut inner = self.inner.lock();
         inner.contiguous = true;
         for (i, f) in frames.drain(0..).enumerate() {
-            kernel_hal::frame_zero(f.addr());
+            kernel_hal::frame_zero_in_range(f.addr(), 0, PAGE_SIZE);
             let mut state = PageState::new(f);
             state.pin_count += 1;
             inner.frames.insert(i, state);
@@ -774,7 +813,7 @@ impl VMObjectPagedInner {
     /// Count committed pages of the VMO.
     fn committed_pages_in_range(&self, start_idx: usize, end_idx: usize) -> usize {
         assert!(
-            start_idx < self.size / PAGE_SIZE,
+            start_idx < self.size / PAGE_SIZE || start_idx == 0,
             "start_idx {:#x}, self.size {:#x}",
             start_idx,
             self.size
@@ -804,6 +843,9 @@ impl VMObjectPagedInner {
                         break;
                     }
                 }
+                if inner.user_id != self.user_id {
+                    break;
+                }
                 current_idx += inner.parent_offset / PAGE_SIZE;
                 if current_idx >= inner.parent_limit / PAGE_SIZE {
                     break;
@@ -926,7 +968,7 @@ impl VMObjectPagedInner {
         Ok(child)
     }
 
-    fn complete_info(&self, info: &mut ZxInfoVmo) {
+    fn complete_info(&self, info: &mut VmoInfo) {
         if let VMOType::Snapshot = self.type_ {
             info.flags |= VmoInfoFlags::IS_COW_CLONE;
         }
@@ -946,7 +988,6 @@ impl VMObjectPagedInner {
         let mut child = self.self_ref.clone();
         while let Some(parent) = option_parent {
             let mut locked_parent = parent.inner.lock();
-            if locked_parent.user_id == self.user_id {
             let (tag, other) = locked_parent.type_.get_tag_and_other(&child);
             let arc_other = other.upgrade().unwrap();
             let mut locked_other = arc_other.inner.lock();
@@ -962,6 +1003,7 @@ impl VMObjectPagedInner {
                             to_insert.tag = PageStateTag::Owned;
                             locked_other.frames.insert(idx - start, to_insert);
                         }
+                        unwanted.push_back(idx + locked_parent.parent_offset / PAGE_SIZE);
                     }
                 } else {
                     // otherwise, if it exists in our frames, remove it; if not, push_back it again
@@ -975,18 +1017,21 @@ impl VMObjectPagedInner {
             child = locked_parent.self_ref.clone();
             option_parent = locked_parent.parent.clone();
             drop(locked_parent);
-            } else {
-                break;
-            }
         }
     }
 
     fn resize(&mut self, new_size: usize) {
-        if new_size < self.size {
+        if new_size == 0 && new_size < self.size {
+            self.frames.clear();
+            if let Some(parent) = self.parent.as_ref() {
+                parent.inner.lock().remove_child(&self.self_ref);
+                self.parent = None;
+            }
+        } else if new_size < self.size {
             let mut unwanted = VecDeque::<usize>::new();
             let parent_end = (self.parent_limit - self.parent_offset) / PAGE_SIZE;
             for i in new_size / PAGE_SIZE..self.size / PAGE_SIZE {
-                if self.frames.remove(&i).is_none() && parent_end > i {
+                if parent_end > i {
                     unwanted.push_back(i);
                 }
             }

zircon-object/src/vm/vmo/physical.rs

@@ -29,12 +29,8 @@ impl VMObjectPhysicalInner {
 
 impl VMObjectPhysical {
     /// Create a new VMO representing a piece of contiguous physical memory.
-    ///
-    /// # Safety
-    ///
     /// You must ensure nobody has the ownership of this piece of memory yet.
-    #[allow(unsafe_code)]
+    pub fn new(paddr: PhysAddr, pages: usize) -> Arc<Self> {
-    pub unsafe fn new(paddr: PhysAddr, pages: usize) -> Arc<Self> {
         assert!(page_aligned(paddr));
         Arc::new(VMObjectPhysical {
             paddr,
@@ -91,7 +87,6 @@ impl VMObjectTrait for VMObjectPhysical {
         Err(ZxError::NOT_SUPPORTED)
     }
 
-    #[allow(unsafe_code)]
     fn create_slice(
         self: Arc<Self>,
         _id: KoID,
@@ -99,7 +94,7 @@ impl VMObjectTrait for VMObjectPhysical {
         len: usize,
     ) -> ZxResult<Arc<dyn VMObjectTrait>> {
         assert!(page_aligned(offset) && page_aligned(len));
-        let obj = unsafe { VMObjectPhysical::new(self.paddr + offset, len / PAGE_SIZE) };
+        let obj = VMObjectPhysical::new(self.paddr + offset, len / PAGE_SIZE);
         obj.inner.lock().cache_policy = self.inner.lock().cache_policy;
         Ok(obj)
     }
@@ -116,8 +111,8 @@ impl VMObjectTrait for VMObjectPhysical {
         inner.mapping_count -= 1;
     }
 
-    fn complete_info(&self, _info: &mut ZxInfoVmo) {
+    fn complete_info(&self, _info: &mut VmoInfo) {
-        unimplemented!()
+        warn!("VmoInfo for physical is unimplemented");
     }
 
     fn get_cache_policy(&self) -> CachePolicy {
@@ -140,10 +135,14 @@ impl VMObjectTrait for VMObjectPhysical {
     }
 
     fn share_count(&self) -> usize {
-        unimplemented!()
+        self.inner.lock().mapping_count as usize
     }
 
     fn committed_pages_in_range(&self, _start_idx: usize, _end_idx: usize) -> usize {
+        0
+    }
+
+    fn zero(&self, _offset: usize, _len: usize) -> ZxResult {
         unimplemented!()
     }
 
@@ -160,7 +159,7 @@ mod tests {
 
     #[test]
     fn read_write() {
-        let vmo = unsafe { VmObject::new_physical(0x1000, 2) };
+        let vmo = VmObject::new_physical(0x1000, 2);
         let vmphy = vmo.inner.clone();
         assert_eq!(vmphy.get_cache_policy(), CachePolicy::Uncached);
         super::super::tests::read_write(&vmo);

zircon-syscall/src/ddk.rs

@@ -1,12 +1,9 @@
 use {
     super::*,
-    zircon_object::{
-        dev::*,
-        resource::*,
-    },
     bitflags::bitflags,
     kernel_hal::DevVAddr,
     zircon_object::vm::{page_aligned, VmObject},
+    zircon_object::{dev::*, resource::*},
 };
 
 impl Syscall<'_> {
@@ -23,7 +20,8 @@ impl Syscall<'_> {
             resource, type_, desc, desc_size, out
         );
         let proc = self.thread.proc();
-        proc.validate_resource(resource, ResourceKind::ROOT)?;
+        proc.get_object::<Resource>(resource)?
+            .validate(ResourceKind::ROOT)?;
         if desc_size > IOMMU_MAX_DESC_LEN {
             return Err(ZxError::INVALID_ARGS);
         }
@@ -91,7 +89,6 @@ impl Syscall<'_> {
 
         let mut iommu_perms = IommuPerms::empty();
         let options = BtiOptions::from_bits_truncate(options);
-        
         if options.contains(BtiOptions::PERM_READ) {
             if !rights.contains(Rights::READ) {
                 return Err(ZxError::ACCESS_DENIED);
@@ -115,7 +112,6 @@ impl Syscall<'_> {
             }
             iommu_perms.insert(IommuPerms::PERM_EXECUTE);
         }
-        
         if options.contains(BtiOptions::CONTIGUOUS) && options.contains(BtiOptions::COMPRESS) {
             return Err(ZxError::INVALID_ARGS);
         }
@@ -127,8 +123,11 @@ impl Syscall<'_> {
         let pmt = bti.pin(vmo, offset, size, iommu_perms)?;
         let encoded_addrs = pmt.as_ref().encode_addrs(compress_results, contiguous)?;
         if encoded_addrs.len() != addrs_count {
-            warn!("bti.pin addrs_count = {}, but encoded_addrs.len = {}",
+            warn!(
-                addrs_count, encoded_addrs.len());
+                "bti.pin addrs_count = {}, but encoded_addrs.len = {}",
+                addrs_count,
+                encoded_addrs.len()
+            );
             return Err(ZxError::INVALID_ARGS);
         }
         addrs.write_array(&encoded_addrs)?;
@@ -137,26 +136,35 @@ impl Syscall<'_> {
         Ok(())
     }
 
-    pub fn sys_pmt_unpin(
+    pub fn sys_pmt_unpin(&self, pmt: HandleValue) -> ZxResult {
-        &self,
-        pmt: HandleValue,
-    ) -> ZxResult {
         info!("pmt.unpin: pmt={:#x}", pmt);
         let proc = self.thread.proc();
         let pmt = proc.remove_object::<Pmt>(pmt)?;
         pmt.as_ref().unpin_and_remove()
     }
 
-    pub fn sys_bti_release_quarantine(
+    pub fn sys_bti_release_quarantine(&self, bti: HandleValue) -> ZxResult {
-        &self,
-        bti: HandleValue,
-    ) -> ZxResult {
         info!("bti.release_quarantine: bti = {:#x}", bti);
         let proc = self.thread.proc();
         let bti = proc.get_object_with_rights::<Bti>(bti, Rights::WRITE)?;
         bti.release_quarantine();
         Ok(())
     }
+    pub fn sys_pc_firmware_tables(
+        &self,
+        resource: HandleValue,
+        mut acpi_rsdp_ptr: UserOutPtr<u64>,
+        mut smbios_ptr: UserOutPtr<u64>,
+    ) -> ZxResult {
+        info!("pc_firmware_tables: handle={:?}", resource);
+        let proc = self.thread.proc();
+        proc.get_object::<Resource>(resource)?
+            .validate(ResourceKind::ROOT)?;
+        let (acpi_rsdp, smbios) = kernel_hal::pc_firmware_tables();
+        acpi_rsdp_ptr.write(acpi_rsdp)?;
+        smbios_ptr.write(smbios)?;
+        Ok(())
+    }
 }
 
 const IOMMU_MAX_DESC_LEN: usize = 4096;
@@ -172,4 +180,3 @@ bitflags! {
         const CONTIGUOUS            = 1 << 4;
     }
 }
-

zircon-syscall/src/debug.rs

@@ -1,5 +1,5 @@
 use super::*;
-use zircon_object::resource::ResourceKind;
+use zircon_object::resource::*;
 
 impl Syscall<'_> {
     pub fn sys_debug_write(&self, buf: UserInPtr<u8>, len: usize) -> ZxResult {
@@ -21,7 +21,8 @@ impl Syscall<'_> {
             handle, buf, buf_size
         );
         let proc = self.thread.proc();
-        proc.validate_resource(handle, ResourceKind::ROOT)?;
+        proc.get_object::<Resource>(handle)?
+            .validate(ResourceKind::ROOT)?;
         // FIXME: To make 'console' work, now debug_read is a blocking call.
         //        But it should be non-blocking.
         // let mut vec = vec![0u8; buf_size as usize];

zircon-syscall/src/debuglog.rs

@@ -1,6 +1,6 @@
 use {
     super::*,
-    zircon_object::{debuglog::DebugLog, resource::ResourceKind},
+    zircon_object::{debuglog::DebugLog, resource::*},
 };
 
 const FLAG_READABLE: u32 = 0x4000_0000u32;
@@ -18,7 +18,8 @@ impl Syscall<'_> {
         );
         let proc = self.thread.proc();
         if rsrc != 0 {
-            proc.validate_resource(rsrc, ResourceKind::ROOT)?;
+            proc.get_object::<Resource>(rsrc)?
+                .validate(ResourceKind::ROOT)?;
         }
         let dlog = DebugLog::create(options);
         let dlog_right = if options & FLAG_READABLE == 0 {

zircon-syscall/src/lib.rs

@@ -248,6 +248,7 @@ impl Syscall<'_> {
             Sys::OBJECT_GET_CHILD => {
                 self.sys_object_get_child(a0 as _, a1 as _, a2 as _, a3.into())
             }
+            Sys::PC_FIRMWARE_TABLES => self.sys_pc_firmware_tables(a0 as _, a1.into(), a2.into()),
             _ => {
                 error!("syscall unimplemented: {:?}", sys_type);
                 Err(ZxError::NOT_SUPPORTED)

zircon-syscall/src/object.rs

@@ -134,17 +134,11 @@ impl Syscall<'_> {
         deadline: Deadline,
         mut observed: UserOutPtr<Signal>,
     ) -> ZxResult {
+        let signals = Signal::from_bits_truncate(signals);
         info!(
             "object.wait_one: handle={:#x?}, signals={:#x?}, deadline={:#x?}, observed={:#x?}",
             handle, signals, deadline, observed
         );
-        let signals = Signal::from_bits(signals).ok_or_else(|| {
-            if !deadline.is_positive() {
-                ZxError::TIMED_OUT
-            } else {
-                ZxError::INVALID_ARGS
-            }
-        })?;
         let proc = self.thread.proc();
         let object = proc.get_dyn_object_with_rights(handle, Rights::WAIT)?;
         let cancel_token = proc.get_cancel_token(handle)?;
@@ -168,7 +162,6 @@ impl Syscall<'_> {
         Ok(())
     }
 
-    #[allow(unsafe_code)]
     pub fn sys_object_get_info(
         &self,
         handle: HandleValue,
@@ -224,75 +217,39 @@ impl Syscall<'_> {
                 let mut info = vmo.get_info();
                 info.flags |= VmoInfoFlags::VIA_HANDLE;
                 info.rights |= rights;
-                UserOutPtr::<ZxInfoVmo>::from(buffer).write(info)?;
+                UserOutPtr::<VmoInfo>::from(buffer).write(info)?;
             }
             Topic::KmemStats => {
-                let mut kmem = ZxInfoKmem::default();
+                let mut kmem = KmemInfo::default();
                 kmem.vmo_bytes = vmo_page_bytes() as u64;
-                UserOutPtr::<ZxInfoKmem>::from(buffer).write(kmem)?;
+                UserOutPtr::<KmemInfo>::from(buffer).write(kmem)?;
-            }
-            Topic::JobProcess => {
-                let job = proc.get_object_with_rights::<Job>(handle, Rights::ENUMERATE)?;
-                let (mut count, mut avail_count) = (0usize, 0usize);
-                let ptr = UserOutPtr::<KoID>::from(buffer).as_ptr();
-                let item_size = core::mem::size_of::<KoID>();
-                job.enumerate_process(|id| {
-                    if count < buffer_size / item_size {
-                        unsafe {
-                            ptr.add(count).write(id);
-                        }
-                        count += 1;
-                    }
-                    avail_count += 1;
-                    true
-                });
-                actual.write(count)?;
-                avail.write(avail_count)?;
             }
             Topic::TaskStats => {
-                assert_eq!(core::mem::size_of::<ZxInfoTaskStats>(), buffer_size);
+                assert_eq!(core::mem::size_of::<TaskStatsInfo>(), buffer_size);
                 let vmar = proc
                     .get_object_with_rights::<Process>(handle, Rights::INSPECT)?
                     .vmar();
                 //let mut task_stats = ZxInfoTaskStats::default();
                 let task_stats = vmar.get_task_stats();
-                UserOutPtr::<ZxInfoTaskStats>::from(buffer).write(task_stats)?;
+                UserOutPtr::<TaskStatsInfo>::from(buffer).write(task_stats)?;
             }
-            Topic::ProcessThreads => {
+            Topic::JobChildren | Topic::JobProcess | Topic::ProcessThreads => {
-                let (mut count, mut avail_count) = (0usize, 0usize);
+                let ids = match topic {
-                let ptr = UserOutPtr::<KoID>::from(buffer).as_ptr();
+                    Topic::JobChildren => proc
-                let item_size = core::mem::size_of::<KoID>();
+                        .get_object_with_rights::<Job>(handle, Rights::ENUMERATE)?
-                proc.get_object_with_rights::<Process>(handle, Rights::ENUMERATE)?
+                        .children_ids(),
-                    .enumerate_thread(|id| {
+                    Topic::JobProcess => proc
-                        if count < buffer_size / item_size {
+                        .get_object_with_rights::<Job>(handle, Rights::ENUMERATE)?
-                            unsafe {
+                        .process_ids(),
-                                ptr.add(count).write(id);
+                    Topic::ProcessThreads => proc
-                            }
+                        .get_object_with_rights::<Process>(handle, Rights::ENUMERATE)?
-                            count += 1;
+                        .thread_ids(),
-                        }
+                    _ => unreachable!(),
-                        avail_count += 1;
+                };
-                        true
+                let count = (buffer_size / core::mem::size_of::<KoID>()).min(ids.len());
-                    });
+                UserOutPtr::<KoID>::from(buffer).write_array(&ids[..count])?;
                 actual.write(count)?;
-                avail.write(avail_count)?;
+                avail.write(ids.len())?;
-            }
-            Topic::JobChildren => {
-                let (mut count, mut avail_count) = (0usize, 0usize);
-                let ptr = UserOutPtr::<KoID>::from(buffer).as_ptr();
-                let item_size = core::mem::size_of::<KoID>();
-                proc.get_object_with_rights::<Job>(handle, Rights::ENUMERATE)?
-                    .enumerate_children(|id| {
-                        if count < buffer_size / item_size {
-                            unsafe {
-                                ptr.add(count).write(id);
-                            }
-                            count += 1;
-                        }
-                        avail_count += 1;
-                        true
-                    });
-                actual.write(count)?;
-                avail.write(avail_count)?;
             }
             Topic::Bti => {
                 let bti = proc.get_object_with_rights::<Bti>(handle, Rights::INSPECT)?;
@@ -333,7 +290,7 @@ impl Syscall<'_> {
         signals: u32,
         options: u32,
     ) -> ZxResult {
-        let signals = Signal::from_bits(signals).ok_or(ZxError::INVALID_ARGS)?;
+        let signals = Signal::from_bits_truncate(signals);
         info!(
             "object.wait_async: handle={:#x}, port={:#x}, key={:#x}, signal={:?}, options={:#X}",
             handle_value, port_handle_value, key, signals, options
@@ -484,7 +441,7 @@ pub struct UserWaitItem {
 
 #[repr(C)]
 #[derive(Default)]
-struct ZxInfoKmem {
+struct KmemInfo {
     total_bytes: u64,
     free_bytes: u64,
     wired_bytes: u64,

zircon-syscall/src/time.rs

@@ -32,14 +32,14 @@ impl Syscall<'_> {
         }
     }
 
-    pub fn sys_clock_adjust(&self, hrsrc: HandleValue, clock_id: u32, offset: u64) -> ZxResult {
+    pub fn sys_clock_adjust(&self, resource: HandleValue, clock_id: u32, offset: u64) -> ZxResult {
         info!(
-            "clock.adjust: hrsrc={:#x?}, id={:#x}, offset={:#x}",
+            "clock.adjust: resource={:#x?}, id={:#x}, offset={:#x}",
-            hrsrc, clock_id, offset
+            resource, clock_id, offset
         );
-        self.thread
+        let proc = self.thread.proc();
-            .proc()
+        proc.get_object::<Resource>(resource)?
-            .validate_resource(hrsrc, ResourceKind::ROOT)?;
+            .validate(ResourceKind::ROOT)?;
         match clock_id {
             ZX_CLOCK_MONOTONIC => Err(ZxError::ACCESS_DENIED),
             ZX_CLOCK_UTC => {

zircon-syscall/src/vmo.rs

@@ -2,6 +2,7 @@ use {
     super::*,
     bitflags::bitflags,
     kernel_hal::CachePolicy,
+    numeric_enum_macro::numeric_enum,
     zircon_object::{dev::*, resource::*, task::PolicyCondition, vm::*},
 };
 
@@ -83,7 +84,8 @@ impl Syscall<'_> {
         );
         let proc = self.thread.proc();
         if vmex != INVALID_HANDLE {
-            proc.validate_resource(vmex, ResourceKind::VMEX)?;
+            proc.get_object::<Resource>(vmex)?
+                .validate(ResourceKind::VMEX)?;
         } else {
             proc.check_policy(PolicyCondition::AmbientMarkVMOExec)?;
         }
@@ -166,21 +168,21 @@ impl Syscall<'_> {
         Ok(())
     }
 
-    #[allow(unsafe_code)]
     pub fn sys_vmo_create_physical(
         &self,
-        rsrc: HandleValue,
+        resource: HandleValue,
         paddr: PhysAddr,
         size: usize,
         mut out: UserOutPtr<HandleValue>,
     ) -> ZxResult {
         info!(
             "vmo.create_physical: handle={:#x?}, paddr={:#x?}, size={:#x}, out={:#x?}",
-            size, paddr, size, out
+            resource, paddr, size, out
         );
         let proc = self.thread.proc();
         proc.check_policy(PolicyCondition::NewVMO)?;
-        proc.validate_resource(rsrc, ResourceKind::MMIO)?;
+        proc.get_object::<Resource>(resource)?
+            .validate_ranged_resource(ResourceKind::MMIO, paddr, size)?;
         let size = roundup_pages(size);
         if size == 0 || !page_aligned(paddr) {
             return Err(ZxError::INVALID_ARGS);
@@ -188,7 +190,7 @@ impl Syscall<'_> {
         if paddr.overflowing_add(size).1 {
             return Err(ZxError::INVALID_ARGS);
         }
-        let vmo = unsafe { VmObject::new_physical(paddr, size / PAGE_SIZE) };
+        let vmo = VmObject::new_physical(paddr, size / PAGE_SIZE);
         let handle_value = proc.add_handle(Handle::new(vmo, Rights::DEFAULT_VMO | Rights::EXECUTE));
         out.write(handle_value)?;
         Ok(())
@@ -250,25 +252,35 @@ impl Syscall<'_> {
             "vmo.op_range: handle={:#x}, op={:#X}, offset={:#x}, len={:#x}, buffer_size={:#x}",
             handle_value, op, offset, len, _buffer_size,
         );
+        let op = VmoOpType::try_from(op).or(Err(ZxError::INVALID_ARGS))?;
         let proc = self.thread.proc();
         let (vmo, rights) = proc.get_object_and_rights::<VmObject>(handle_value)?;
-        if !page_aligned(offset) || !page_aligned(len) {
-            return Err(ZxError::INVALID_ARGS);
-        }
         match op {
-            VMO_OP_COMMIT => {
+            VmoOpType::Commit => {
                 if !rights.contains(Rights::WRITE) {
                     return Err(ZxError::ACCESS_DENIED);
                 }
+                if !page_aligned(offset) || !page_aligned(len) {
+                    return Err(ZxError::INVALID_ARGS);
+                }
                 vmo.commit(offset, len)?;
                 Ok(())
             }
-            VMO_OP_DECOMMIT => {
+            VmoOpType::Decommit => {
                 if !rights.contains(Rights::WRITE) {
                     return Err(ZxError::ACCESS_DENIED);
                 }
+                if !page_aligned(offset) || !page_aligned(len) {
+                    return Err(ZxError::INVALID_ARGS);
+                }
                 vmo.decommit(offset, len)
             }
+            VmoOpType::Zero => {
+                if !rights.contains(Rights::WRITE) {
+                    return Err(ZxError::ACCESS_DENIED);
+                }
+                vmo.zero(offset, len)
+            }
             _ => unimplemented!(),
         }
     }
@@ -292,6 +304,18 @@ bitflags! {
     }
 }
 
-/// VMO Opcodes (for vmo_op_range)
+numeric_enum! {
-const VMO_OP_COMMIT: u32 = 1;
+    #[repr(u32)]
-const VMO_OP_DECOMMIT: u32 = 2;
+    /// VMO Opcodes (for vmo_op_range)
+    pub enum VmoOpType {
+        Commit = 1,
+        Decommit = 2,
+        Lock = 3,
+        Unlock = 4,
+        CacheSync = 6,
+        CacheInvalidate = 7,
+        CacheClean = 8,
+        CacheCleanInvalidate = 9,
+        Zero = 10,
+    }
+}