forge/
patch.rs

1use sys::patch::{Patch as SysPatch, *};
2
3/// A memory patch that can be enabled or disabled at runtime.
4/// When enabled, the patch will overwrite the target bytes with the patch bytes.
5/// When disabled, the original bytes will be restored.
6///
7/// The patch will be automatically disabled and cleaned up when dropped.
8pub struct Patch {
9    inner: SysPatch,
10}
11
12impl Patch {
13    /// Creates a new patch at the given address with the given patch bytes.
14    /// The patch is enabled if `enable` is true, otherwise it is created in a disabled state.
15    pub fn new(addr: u32, bytes: &[u8], enable: bool) -> Self {
16        Self {
17            inner: unsafe { forge_patch_create(addr, bytes.as_ptr().cast(), bytes.len() as u32, enable) },
18        }
19    }
20
21    /// Gets the address that this patch targets.
22    pub fn addr(&self) -> u32 {
23        self.inner.addr
24    }
25
26    /// Gets the length of this patch in bytes.
27    pub fn len(&self) -> u32 {
28        self.inner.size
29    }
30
31    /// Returns `true` if this patch is currently enabled.
32    pub fn enabled(&self) -> bool {
33        self.inner.enabled
34    }
35
36    /// Enables this patch, applying the patch bytes to the target address.
37    pub fn enable(&mut self) {
38        unsafe {
39            forge_patch_enable(&mut self.inner);
40        }
41    }
42
43    /// Disables this patch, restoring the original bytes at the target address.
44    pub fn disable(&mut self) {
45        unsafe {
46            forge_patch_disable(&mut self.inner);
47        }
48    }
49
50    /// Returns a byte slice of the patch bytes that will be written when this patch is enabled.
51    pub fn patch_bytes(&self) -> &[u8] {
52        unsafe { core::slice::from_raw_parts(self.inner.patch_bytes.cast(), self.inner.size as usize) }
53    }
54
55    /// Returns a byte slice of the original bytes that are overwritten when this patch is enabled.
56    pub fn original_bytes(&self) -> &[u8] {
57        unsafe { core::slice::from_raw_parts(self.inner.original_bytes.cast(), self.inner.size as usize) }
58    }
59}
60
61impl core::ops::Drop for Patch {
62    fn drop(&mut self) {
63        unsafe {
64            forge_patch_destroy(&mut self.inner);
65        }
66    }
67}
forge/patch.rs

forge/
patch.rs
