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//! Virtual address translation
//!
//! This module describes virtual to physical address translation interfaces.
//!
//! * [VirtualTranslate](VirtualTranslate) - user facing trait providing a way to translate
//! addresses.
//!
//! * [VirtualTranslate2](VirtualTranslate2) - internally used trait that translates pairs of
//! buffers and virtual addresses into pairs of buffers and their corresponding physical addresses.
//! Is used to provide [virtual memory view](crate::mem::virt_mem::virtual_dma). This trait is also
//! a [point of caching](crate::mem::virt_translate::cache) for the translations.
//!
//! * [VirtualTranslate3](VirtualTranslate3) - a sub-scope that translates addresses of a single
//! address space. Objects that implement VirtualTranslate3 are designed to be cheap to construct,
//! because they use pooled resources from VirtualTranslate2 objects. This is equivalent to storing
//! a single VirtualTranslate2 state for the OS, while constructing VirtualTranslate3 instances for
//! each process. This is precisely what is being done in our Win32 OS (see
//! [here](https://github.com/memflow/memflow-win32/blob/791bb7afb8a984034dde314c136b7675b44e3abf/src/win32/process.rs#L348),
//! and
//! [here](https://github.com/memflow/memflow-win32/blob/791bb7afb8a984034dde314c136b7675b44e3abf/src/win32/process.rs#L314)).
//!
//! Below figure shows entire pipeline of a virtual address translating object with caching.
//!
//! ```text
//! +--------------------------+
//! | (Win32Process) |
//! | VirtualTranslate | (Contains VT2+VT3+Phys)
//! | MemoryView |
//! +--------------------------+
//! |
//! |
//! +-----------+--------------+
//! | (CachedVirtualTranslate) | (Accepts VT3+Phys)
//! | VirtualTranslate2 | (Point of caching)
//! +--------------------------+
//! |
//! |
//! +--------+----------+
//! | (DirectTranslate) | (Accepts VT3+Phys)
//! | VirtualTranslate2 | (Contains 64MB buffer)
//! +-------------------+
//! |
//! |
//! +----------+-------------+
//! | (X86 VirtualTranslate) | (Accepts 64MB buffer+Phys)
//! | VirtualTranslate3 | (Contains CR3+ArchMmuSpec)
//! +------------------------+
//! |
//! |
//! +------+------+
//! | ArchMmuSpec | (Accepts translation root (CR3), buffer, Phys)
//! +-------------+ (Contains architecture specification)
//! |
//! |
//! +-------+--------+
//! | PhysicalMemory | (Accepts special page flags)
//! +----------------+
//! |
//! |
//! ... (Further nesting)
//! ```
use std::prelude::v1::*;
use super::{MemoryRange, MemoryRangeCallback, VtopRange};
use std::cmp::*;
use cglue::prelude::v1::*;
use itertools::Itertools;
pub mod direct_translate;
use crate::iter::SplitAtIndex;
pub use direct_translate::DirectTranslate;
use crate::architecture::ArchitectureObj;
use crate::types::gap_remover::GapRemover;
#[macro_use]
pub mod mmu;
pub mod cache;
pub use cache::*;
#[cfg(test)]
mod tests;
use crate::error::{Result, *};
use crate::mem::PhysicalMemory;
use crate::types::{imem, umem, Address, Page, PhysicalAddress};
/// Translates virtual addresses into physical ones.
///
/// This is a simple user-facing trait to perform virtual address translations. Implementor needs
/// to implement only 1 function - [virt_to_phys_list](VirtualTranslate::virt_to_phys_list). Other
/// functions are provided as helpers built on top of the base function.
///
/// For overview how this trait relates to other virtual translation traits,
/// check out documentation of [this module](self).
#[cfg_attr(feature = "plugins", cglue_trait)]
#[int_result]
pub trait VirtualTranslate: Send {
/// Translate a list of address ranges into physical address space.
///
/// This function will take addresses in `addrs` and produce translation of them into `out`.
/// Any unsuccessful ranges will be sent to `out_fail`.
///
/// # Remarks
///
/// Note that the number of outputs may not match the number of inputs - virtual address space
/// does not usually map linearly to the physical one, thus the input may need to be split into
/// smaller parts, which may not be combined back together.
///
/// # Example:
///
/// ```
/// use memflow::prelude::v1::*;
/// # use memflow::dummy::DummyOs;
///
/// // Virtual translation test
/// fn vtop(mem: &mut impl VirtualTranslate, addr: Address) {
/// let mut cnt = 0;
/// mem.virt_to_phys_list(
/// &[CTup2(addr, 0x2000)],
/// // Successfully translated
/// (&mut |_| { cnt += 1; true }).into(),
/// // Failed to translate
/// (&mut |v| panic!("Failed to translate: {:?}", v)).into()
/// );
/// // We attempt to translate 2 pages, thus there are 2 outputs.
/// assert_eq!(2, cnt);
/// }
/// # let mut proc = DummyOs::quick_process(size::mb(2), &[]);
/// # let addr = proc.info().address;
/// # vtop(&mut proc.mem, addr);
/// ```
fn virt_to_phys_list(
&mut self,
addrs: &[VtopRange],
out: VirtualTranslationCallback,
out_fail: VirtualTranslationFailCallback,
);
/// Translate a single virtual address range into physical address space.
///
/// This function is a helper for [`virt_to_phys_list`](Self::virt_to_phys_list) that translates
/// just a single range, and has no failure output. It is otherwise identical.
///
/// # Example:
///
/// ```
/// use memflow::prelude::v1::*;
/// # use memflow::dummy::DummyOs;
///
/// // Virtual translation test
/// fn vtop(mem: &mut impl VirtualTranslate, addr: Address) {
/// let mut cnt = 0;
/// mem.virt_to_phys_range(
/// addr, addr + 0x2000,
/// // Successfully translated
/// (&mut |_| { cnt += 1; true }).into(),
/// );
/// // We attempt to translate 2 pages, thus there are 2 outputs.
/// assert_eq!(2, cnt);
/// }
/// # let mut proc = DummyOs::quick_process(size::mb(2), &[]);
/// # let addr = proc.info().address;
/// # vtop(&mut proc.mem, addr);
/// ```
fn virt_to_phys_range(
&mut self,
start: Address,
end: Address,
out: VirtualTranslationCallback,
) {
assert!(end >= start);
self.virt_to_phys_list(
&[CTup2(start, (end - start) as umem)],
out,
(&mut |_| true).into(),
)
}
/// Translate a single virtual address range into physical address space and coalesce nearby
/// regions.
///
/// This function is nearly identical to [`virt_to_phys_range`](Self::virt_to_phys_range), however,
/// it performs additional post-processing of the output to combine consecutive ranges, and
/// output them in sorted order (by input virtual address).
///
/// # Example:
///
/// ```
/// use memflow::prelude::v1::*;
/// use memflow::dummy::{DummyOs, DummyMemory};
///
/// // Create a dummy OS
/// let mem = DummyMemory::new(size::mb(1));
/// let mut os = DummyOs::new(mem);
///
/// // Create a process with 1+10 randomly placed regions
/// let pid = os.alloc_process(size::kb(4), &[]);
/// let proc = os.process_by_pid(pid).unwrap().proc;
/// os.process_alloc_random_mem(&proc, 10, 1);
/// let mut mem = os.process_by_pid(pid).unwrap().mem;
///
/// // Translate entire address space
/// let mut output = vec![];
///
/// mem.virt_translation_map_range(
/// Address::null(),
/// Address::invalid(),
/// (&mut output).into()
/// );
///
/// // There should be 11 memory ranges.
/// assert_eq!(11, output.len());
/// ```
fn virt_translation_map_range(
&mut self,
start: Address,
end: Address,
out: VirtualTranslationCallback,
) {
let mut set = std::collections::BTreeSet::new();
self.virt_to_phys_range(
start,
end,
(&mut |v| {
set.insert(v);
true
})
.into(),
);
set.into_iter()
.coalesce(|a, b| {
// TODO: Probably make the page size reflect the merge
if b.in_virtual == (a.in_virtual + a.size)
&& b.out_physical.address() == (a.out_physical.address() + a.size)
&& a.out_physical.page_type() == b.out_physical.page_type()
{
Ok(VirtualTranslation {
in_virtual: a.in_virtual,
size: a.size + b.size,
out_physical: a.out_physical,
})
} else {
Err((a, b))
}
})
.feed_into(out);
}
/// Retrieves mapped virtual pages in the specified range.
///
/// In case a range from [`Address::null()`], [`Address::invalid()`] is specified
/// this function will return all mappings.
///
/// Given negative gap size, they will not be removed.
///
/// # Example:
///
/// ```
/// use memflow::prelude::v1::*;
/// # use memflow::dummy::{DummyMemory, DummyOs};
/// # use memflow::architecture::x86::x64;
/// # let dummy_mem = DummyMemory::new(size::mb(16));
/// # let mut dummy_os = DummyOs::new(dummy_mem);
/// # let (dtb, virt_base) = dummy_os.alloc_dtb(size::mb(2), &[]);
/// # let translator = x64::new_translator(dtb);
/// # let arch = x64::ARCH;
/// # let mut virt_mem = VirtualDma::new(dummy_os.forward_mut(), arch, translator);
/// println!("{:>16} {:>12} {:<}", "ADDR", "SIZE", "TYPE");
///
/// let callback = &mut |CTup3(addr, size, pagety)| {
/// println!("{:>16x} {:>12x} {:<?}", addr, size, pagety);
/// true
/// };
///
/// // display all mappings with a gap size of 0
/// virt_mem.virt_page_map_range(0, Address::null(), Address::invalid(), callback.into());
/// ```
fn virt_page_map_range(
&mut self,
gap_size: imem,
start: Address,
end: Address,
out: MemoryRangeCallback,
) {
let mut gap_remover = GapRemover::new(out, gap_size, start, end);
self.virt_to_phys_range(
start,
end,
(&mut |VirtualTranslation {
in_virtual,
size,
out_physical,
}| {
gap_remover.push_range(CTup3(in_virtual, size, out_physical.page_type));
true
})
.into(),
);
}
/// Translate a single virtual address into a single physical address.
///
/// This is the simplest translation function that performs single address translation.
///
/// # Example:
///
/// ```
/// use memflow::prelude::v1::*;
/// # use memflow::dummy::DummyOs;
///
/// // Virtual translation test
/// fn vtop(mem: &mut impl VirtualTranslate, addr: Address) {
/// assert!(mem.virt_to_phys(addr).is_ok());
/// }
/// # let mut proc = DummyOs::quick_process(size::mb(2), &[]);
/// # let addr = proc.info().address;
/// # vtop(&mut proc.mem, addr);
/// ```
fn virt_to_phys(&mut self, address: Address) -> Result<PhysicalAddress> {
let mut out = Err(Error(ErrorOrigin::VirtualTranslate, ErrorKind::OutOfBounds));
self.virt_to_phys_list(
&[CTup2(address, 1)],
(&mut |VirtualTranslation {
in_virtual: _,
size: _,
out_physical,
}| {
out = Ok(out_physical);
false
})
.into(),
(&mut |_| true).into(),
);
out
}
/// Retrieve page information at virtual address.
///
/// This function is equivalent to calling
/// [containing_page](crate::types::physical_address::PhysicalAddress::containing_page) on
/// [`virt_to_phys`](Self::virt_to_phys) result.
///
/// # Example:
///
/// ```
/// use memflow::prelude::v1::*;
/// # use memflow::dummy::DummyOs;
///
/// // Virtual translation test
/// fn vtop(mem: &mut impl VirtualTranslate, addr: Address) {
/// let page = mem.virt_page_info(addr).unwrap();
/// assert_eq!(page.page_size, mem::kb(4));
/// assert_eq!(page.page_type, PageType::WRITEABLE);
/// }
/// # let mut proc = DummyOs::quick_process(size::mb(2), &[]);
/// # let addr = proc.info().address;
/// # vtop(&mut proc.mem, addr);
/// ```
fn virt_page_info(&mut self, addr: Address) -> Result<Page> {
let paddr = self.virt_to_phys(addr)?;
Ok(paddr.containing_page())
}
/// Retrieve a vector of physical pages within given range.
///
/// This is equivalent to calling [`virt_page_map_range`](Self::virt_page_map_range) with a
/// vector output argument.
///
/// # Example:
///
/// ```
/// use memflow::prelude::v1::*;
/// # use memflow::dummy::{DummyMemory, DummyOs};
/// # use memflow::architecture::x86::x64;
/// # let dummy_mem = DummyMemory::new(size::mb(16));
/// # let mut dummy_os = DummyOs::new(dummy_mem);
/// # let (dtb, virt_base) = dummy_os.alloc_dtb(size::mb(2), &[]);
/// # let translator = x64::new_translator(dtb);
/// # let arch = x64::ARCH;
/// # let mut virt_mem = VirtualDma::new(dummy_os.forward_mut(), arch, translator);
/// println!("{:>16} {:>12} {:<}", "ADDR", "SIZE", "TYPE");
///
/// // display all mappings with a gap size of 0
/// let out = virt_mem.virt_page_map_range_vec(0, Address::null(), Address::invalid());
///
/// assert!(out.len() > 0);
///
/// for CTup3(addr, size, pagety) in out {
/// println!("{:>16x} {:>12x} {:<?}", addr, size, pagety);
/// }
/// ```
#[skip_func]
fn virt_page_map_range_vec(
&mut self,
gap_size: imem,
start: Address,
end: Address,
) -> Vec<MemoryRange> {
let mut out = vec![];
self.virt_page_map_range(gap_size, start, end, (&mut out).into());
out
}
// page map helpers
/// Get virtual translation map over entire address space.
///
/// This is equivalent to [`virt_translation_map_range`](Self::virt_translation_map_range) with a
/// range from null to highest address.
///
/// # Example:
///
/// ```
/// use memflow::prelude::v1::*;
/// use memflow::dummy::{DummyOs, DummyMemory};
///
/// // Create a dummy OS
/// let mem = DummyMemory::new(size::mb(1));
/// let mut os = DummyOs::new(mem);
///
/// // Create a process with 1+10 randomly placed regions
/// let pid = os.alloc_process(size::kb(4), &[]);
/// let proc = os.process_by_pid(pid).unwrap().proc;
/// os.process_alloc_random_mem(&proc, 10, 1);
/// let mut mem = os.process_by_pid(pid).unwrap().mem;
///
/// // Translate entire address space
/// let mut output = vec![];
///
/// mem.virt_translation_map((&mut output).into());
///
/// // There should be 11 memory ranges.
/// assert_eq!(11, output.len());
/// ```
fn virt_translation_map(&mut self, out: VirtualTranslationCallback) {
self.virt_translation_map_range(Address::null(), Address::invalid(), out)
}
/// Get virtual translation map over entire address space and return it as a vector.
///
/// This is a [`virt_translation_map`](Self::virt_translation_map) helper that stores results
/// into a vector that gets returned.
///
/// # Example:
///
/// ```
/// use memflow::prelude::v1::*;
/// use memflow::dummy::{DummyOs, DummyMemory};
///
/// // Create a dummy OS
/// let mem = DummyMemory::new(size::mb(1));
/// let mut os = DummyOs::new(mem);
///
/// // Create a process with 1+10 randomly placed regions
/// let pid = os.alloc_process(size::kb(4), &[]);
/// let proc = os.process_by_pid(pid).unwrap().proc;
/// os.process_alloc_random_mem(&proc, 10, 1);
/// let mut mem = os.process_by_pid(pid).unwrap().mem;
///
/// // Translate entire address space
/// let output = mem.virt_translation_map_vec();
///
/// // There should be 11 memory ranges.
/// assert_eq!(11, output.len());
/// ```
#[skip_func]
fn virt_translation_map_vec(&mut self) -> Vec<VirtualTranslation> {
let mut out = vec![];
self.virt_translation_map((&mut out).into());
out
}
/// Attempt to translate a physical address into a virtual one.
///
/// This function is the reverse of [`virt_to_phys`](Self::virt_to_phys). Note, that there
/// could could be multiple virtual addresses for one physical address. If all candidates
/// are needed, use [`phys_to_virt_vec`](Self::phys_to_virt_vec) function.
///
/// # Example:
///
/// ```
/// use memflow::prelude::v1::*;
/// # use memflow::dummy::DummyOs;
///
/// // Virtual translation and reversal test
/// fn vtop_ptov(mem: &mut impl VirtualTranslate, addr: Address) {
/// let paddr = mem.virt_to_phys(addr).unwrap();
/// let vaddr = mem.phys_to_virt(paddr.address());
/// assert_eq!(vaddr, Some(addr));
/// }
/// # let mut proc = DummyOs::quick_process(size::mb(2), &[]);
/// # let addr = proc.info().address;
/// # vtop_ptov(&mut proc.mem, addr);
/// ```
fn phys_to_virt(&mut self, phys: Address) -> Option<Address> {
let mut virt = None;
let callback = &mut |VirtualTranslation {
in_virtual,
size: _,
out_physical,
}| {
if out_physical.address() == phys {
virt = Some(in_virtual);
false
} else {
true
}
};
self.virt_translation_map(callback.into());
virt
}
/// Retrieve all virtual address that map into a given physical address.
///
/// This function is the reverse of [`virt_to_phys`](Self::virt_to_phys), and it retrieves all
/// physical addresses that map to this virtual address.
///
/// # Example:
///
/// ```
/// use memflow::prelude::v1::*;
/// # use memflow::dummy::DummyOs;
///
/// // Virtual translation and reversal test
/// fn vtop_ptov(mem: &mut impl VirtualTranslate, addr: Address) {
/// let paddr = mem.virt_to_phys(addr).unwrap();
/// let vaddrs = mem.phys_to_virt_vec(paddr.address());
/// assert_eq!(&vaddrs, &[addr]);
/// }
/// # let mut proc = DummyOs::quick_process(size::mb(2), &[]);
/// # let addr = proc.info().address;
/// # vtop_ptov(&mut proc.mem, addr);
/// ```
#[skip_func]
fn phys_to_virt_vec(&mut self, phys: Address) -> Vec<Address> {
let mut virt = vec![];
let callback = &mut |VirtualTranslation {
in_virtual,
size: _,
out_physical,
}| {
if out_physical.address() == phys {
virt.push(in_virtual);
true
} else {
true
}
};
self.virt_translation_map(callback.into());
virt
}
/// Retrieves all mapped virtual pages.
///
/// The [`virt_page_map`](Self::virt_page_map) function is a convenience wrapper for calling
/// [`virt_page_map_range`](Self::virt_page_map_range)`(gap_size, Address::null(), Address::invalid(), out)`.
///
/// # Example:
///
/// ```
/// use memflow::prelude::v1::*;
/// # use memflow::dummy::{DummyMemory, DummyOs};
/// # use memflow::architecture::x86::x64;
/// # let dummy_mem = DummyMemory::new(size::mb(16));
/// # let mut dummy_os = DummyOs::new(dummy_mem);
/// # let (dtb, virt_base) = dummy_os.alloc_dtb(size::mb(2), &[]);
/// # let translator = x64::new_translator(dtb);
/// # let arch = x64::ARCH;
/// # let mut virt_mem = VirtualDma::new(dummy_os.forward_mut(), arch, translator);
/// println!("{:>16} {:>12} {:<}", "ADDR", "SIZE", "TYPE");
///
/// let callback = &mut |CTup3(addr, size, pagety)| {
/// println!("{:>16x} {:>12x} {:<?}", addr, size, pagety);
/// true
/// };
///
/// // display all mappings with a gap size of 0
/// virt_mem.virt_page_map(0, callback.into());
/// ```
fn virt_page_map(&mut self, gap_size: imem, out: MemoryRangeCallback) {
self.virt_page_map_range(gap_size, Address::null(), Address::invalid(), out)
}
/// Returns a [`Vec`] of all mapped virtual pages.
///
/// The [`virt_page_map`](Self::virt_page_map) function is a convenience wrapper for calling
/// [`virt_page_map_range`](Self::virt_page_map_range)`(gap_size, Address::null(), Address::invalid(), out)`.
///
/// # Remarks:
///
/// This function has to allocate all MemoryRanges when they are put into a [`Vec`].
/// If the additional allocations are undesired please use the provided [`virt_page_map`](Self::virt_page_map) with an appropiate callback.
///
/// # Example:
///
/// ```
/// use memflow::prelude::v1::*;
/// # use memflow::dummy::{DummyMemory, DummyOs};
/// # use memflow::architecture::x86::x64;
/// # let dummy_mem = DummyMemory::new(size::mb(16));
/// # let mut dummy_os = DummyOs::new(dummy_mem);
/// # let (dtb, virt_base) = dummy_os.alloc_dtb(size::mb(2), &[]);
/// # let translator = x64::new_translator(dtb);
/// # let arch = x64::ARCH;
/// # let mut virt_mem = VirtualDma::new(dummy_os.forward_mut(), arch, translator);
/// // acquire all mappings with a gap size of 0
/// let maps = virt_mem.virt_page_map_vec(0);
///
/// println!("{:>16} {:>12} {:<}", "ADDR", "SIZE", "TYPE");
/// for CTup3(addr, size, pagety) in maps.iter() {
/// println!("{:>16x} {:>12x} {:<?}", addr, size, pagety);
/// };
/// ```
#[skip_func]
fn virt_page_map_vec(&mut self, gap_size: imem) -> Vec<MemoryRange> {
let mut out = vec![];
self.virt_page_map(gap_size, (&mut out).into());
out
}
}
pub type VirtualTranslationCallback<'a> = OpaqueCallback<'a, VirtualTranslation>;
pub type VirtualTranslationFailCallback<'a> = OpaqueCallback<'a, VirtualTranslationFail>;
/// Virtual page range information with physical mappings used for callbacks
#[repr(C)]
#[derive(Clone, Debug, Eq, Copy)]
#[cfg_attr(feature = "serde", derive(::serde::Serialize, ::serde::Deserialize))]
#[cfg_attr(feature = "abi_stable", derive(::abi_stable::StableAbi))]
pub struct VirtualTranslation {
pub in_virtual: Address,
pub size: umem,
pub out_physical: PhysicalAddress,
}
impl Ord for VirtualTranslation {
fn cmp(&self, other: &Self) -> Ordering {
self.in_virtual.cmp(&other.in_virtual)
}
}
impl PartialOrd for VirtualTranslation {
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
Some(self.cmp(other))
}
}
impl PartialEq for VirtualTranslation {
fn eq(&self, other: &Self) -> bool {
self.in_virtual == other.in_virtual
}
}
#[repr(C)]
#[derive(Clone, Copy, Debug)]
#[cfg_attr(feature = "serde", derive(::serde::Serialize, ::serde::Deserialize))]
#[cfg_attr(feature = "abi_stable", derive(::abi_stable::StableAbi))]
pub struct VirtualTranslationFail {
pub from: Address,
pub size: umem,
}
pub trait VirtualTranslate2
where
Self: Send,
{
/// Translate a list of virtual addresses
///
/// This function will do a virtual to physical memory translation for the
/// `VirtualTranslate3` over multiple elements.
///
/// In most cases, you will want to use the `VirtualDma`, but this trait is provided if needed
/// to implement some more advanced filtering.
///
/// # Examples
///
/// ```
/// # use memflow::error::Result;
/// # use memflow::types::{PhysicalAddress, Address, umem};
/// # use memflow::dummy::{DummyMemory, DummyOs};
/// use memflow::mem::{VirtualTranslate2, DirectTranslate};
/// use memflow::types::size;
/// use memflow::architecture::x86::x64;
/// use memflow::cglue::{FromExtend, CTup3};
///
/// use std::convert::TryInto;
///
/// # const VIRT_MEM_SIZE: usize = size::mb(8) as usize;
/// # const CHUNK_SIZE: usize = 2;
/// #
/// # let mem = DummyMemory::new(size::mb(16));
/// # let mut os = DummyOs::new(mem);
/// # let (dtb, virtual_base) = os.alloc_dtb(VIRT_MEM_SIZE, &[]);
/// # let mut mem = os.into_inner();
/// # let translator = x64::new_translator(dtb);
/// let arch = x64::ARCH;
///
/// let mut buffer = vec![0; VIRT_MEM_SIZE * CHUNK_SIZE / arch.page_size()];
/// let buffer_length = buffer.len();
///
/// // In this example, 8 megabytes starting from `virtual_base` are mapped in.
/// // We translate 2 bytes chunks over the page boundaries. These bytes will be
/// // split off into 2 separate translated chunks.
/// let addresses = buffer
/// .chunks_mut(CHUNK_SIZE)
/// .enumerate()
/// .map(|(i, buf)| CTup3(virtual_base + ((i + 1) * size::kb(4) - 1), Address::NULL, buf));
///
/// let mut translated_data = vec![];
/// let mut failed_translations = &mut |_| true;
///
/// let mut direct_translate = DirectTranslate::new();
///
/// direct_translate.virt_to_phys_iter(
/// &mut mem,
/// &translator,
/// addresses,
/// &mut translated_data.from_extend(),
/// &mut failed_translations.into(),
/// );
///
///
/// // We tried to translate one byte out of the mapped memory, it had to fail
/// assert_eq!(translated_data.len(), buffer_length - 1);
///
/// # Ok::<(), memflow::error::Error>(())
/// ```
fn virt_to_phys_iter<T, B, D, VI>(
&mut self,
phys_mem: &mut T,
translator: &D,
addrs: VI,
out: &mut VtopOutputCallback<B>,
out_fail: &mut VtopFailureCallback<B>,
) where
T: PhysicalMemory + ?Sized,
B: SplitAtIndex,
D: VirtualTranslate3,
VI: Iterator<Item = CTup3<Address, Address, B>>;
/// Translate a single virtual address
///
/// This function will do a virtual to physical memory translation for the
/// `VirtualTranslate3` for single address returning either PhysicalAddress, or an error.
///
/// # Examples
/// ```
/// # use memflow::error::Result;
/// # use memflow::types::{PhysicalAddress, Address, umem};
/// # use memflow::dummy::{DummyMemory, DummyOs};
/// # use memflow::types::size;
/// # use memflow::mem::VirtualTranslate3;
/// use memflow::mem::{VirtualTranslate2, DirectTranslate};
/// use memflow::architecture::x86::x64;
///
/// # const VIRT_MEM_SIZE: usize = size::mb(8);
/// # const CHUNK_SIZE: usize = 2;
/// #
/// # let mem = DummyMemory::new(size::mb(16));
/// # let mut os = DummyOs::new(mem);
/// # let (dtb, virtual_base) = os.alloc_dtb(VIRT_MEM_SIZE, &[]);
/// # let mut mem = os.into_inner();
/// # let translator = x64::new_translator(dtb);
/// let arch = x64::ARCH;
///
/// let mut direct_translate = DirectTranslate::new();
///
/// // Translate a mapped address
/// let res = direct_translate.virt_to_phys(
/// &mut mem,
/// &translator,
/// virtual_base,
/// );
///
/// assert!(res.is_ok());
///
/// // Translate unmapped address
/// let res = direct_translate.virt_to_phys(
/// &mut mem,
/// &translator,
/// virtual_base - 1,
/// );
///
/// assert!(res.is_err());
///
/// ```
fn virt_to_phys<T: PhysicalMemory + ?Sized, D: VirtualTranslate3>(
&mut self,
phys_mem: &mut T,
translator: &D,
vaddr: Address,
) -> Result<PhysicalAddress> {
let mut output = None;
let success = &mut |elem: CTup3<PhysicalAddress, Address, _>| {
if output.is_none() {
output = Some(elem.0);
}
false
};
let mut output_err = None;
let fail = &mut |elem: (Error, _)| {
output_err = Some(elem.0);
true
};
self.virt_to_phys_iter(
phys_mem,
translator,
Some(CTup3::<_, _, umem>(vaddr, vaddr, 1)).into_iter(),
&mut success.into(),
&mut fail.into(),
);
output.map(Ok).unwrap_or_else(|| Err(output_err.unwrap()))
}
}
// forward impls
impl<T, P> VirtualTranslate2 for P
where
T: VirtualTranslate2 + ?Sized,
P: std::ops::DerefMut<Target = T> + Send,
{
#[inline]
fn virt_to_phys_iter<U, B, D, VI>(
&mut self,
phys_mem: &mut U,
translator: &D,
addrs: VI,
out: &mut VtopOutputCallback<B>,
out_fail: &mut VtopFailureCallback<B>,
) where
U: PhysicalMemory + ?Sized,
B: SplitAtIndex,
D: VirtualTranslate3,
VI: Iterator<Item = CTup3<Address, Address, B>>,
{
(**self).virt_to_phys_iter(phys_mem, translator, addrs, out, out_fail)
}
}
/// Translates virtual memory to physical using internal translation base (usually a process' dtb)
///
/// This trait abstracts virtual address translation for a single virtual memory scope.
/// On x86 architectures, it is a single `Address` - a CR3 register. But other architectures may
/// use multiple translation bases, or use a completely different translation mechanism (MIPS).
pub trait VirtualTranslate3: Clone + Copy + Send {
/// Translate a single virtual address
///
/// # Examples
/// ```
/// # use memflow::error::Result;
/// # use memflow::types::{PhysicalAddress, Address};
/// # use memflow::dummy::{DummyMemory, DummyOs};
/// use memflow::mem::VirtualTranslate3;
/// use memflow::architecture::x86::x64;
/// use memflow::types::{size, umem};
///
/// # const VIRT_MEM_SIZE: usize = size::mb(8);
/// # const CHUNK_SIZE: usize = 2;
/// #
/// # let mem = DummyMemory::new(size::mb(16));
/// # let mut os = DummyOs::new(mem);
/// # let (dtb, virtual_base) = os.alloc_dtb(VIRT_MEM_SIZE, &[]);
/// # let mut mem = os.into_inner();
/// # let translator = x64::new_translator(dtb);
/// let arch = x64::ARCH;
///
/// // Translate a mapped address
/// let res = translator.virt_to_phys(
/// &mut mem,
/// virtual_base,
/// );
///
/// assert!(res.is_ok());
///
/// // Translate unmapped address
/// let res = translator.virt_to_phys(
/// &mut mem,
/// virtual_base - 1,
/// );
///
/// assert!(res.is_err());
///
/// ```
fn virt_to_phys<T: PhysicalMemory>(
&self,
mem: &mut T,
addr: Address,
) -> Result<PhysicalAddress> {
let mut buf: [std::mem::MaybeUninit<u8>; 512] =
unsafe { std::mem::MaybeUninit::uninit().assume_init() };
let mut output = None;
let success = &mut |elem: CTup3<PhysicalAddress, Address, _>| {
if output.is_none() {
output = Some(elem.0);
}
false
};
let mut output_err = None;
let fail = &mut |elem: (Error, _)| {
output_err = Some(elem.0);
true
};
self.virt_to_phys_iter(
mem,
Some(CTup3::<_, _, umem>(addr, addr, 1)).into_iter(),
&mut success.into(),
&mut fail.into(),
&mut buf,
);
output.map(Ok).unwrap_or_else(|| Err(output_err.unwrap()))
}
fn virt_to_phys_iter<
T: PhysicalMemory + ?Sized,
B: SplitAtIndex,
VI: Iterator<Item = CTup3<Address, Address, B>>,
>(
&self,
mem: &mut T,
addrs: VI,
out: &mut VtopOutputCallback<B>,
out_fail: &mut VtopFailureCallback<B>,
tmp_buf: &mut [std::mem::MaybeUninit<u8>],
);
fn translation_table_id(&self, address: Address) -> umem;
fn arch(&self) -> ArchitectureObj;
}
pub type VtopOutputCallback<'a, B> = OpaqueCallback<'a, CTup3<PhysicalAddress, Address, B>>;
pub type VtopFailureCallback<'a, B> = OpaqueCallback<'a, (Error, CTup3<Address, Address, B>)>;