Start adding ABI types

Cargo.lock

@@ -24,16 +24,34 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 name = "freeloader"
 version = "0.1.0"
 dependencies = [
+ "goblin",
  "log",
  "uefi",
 ]
 
+[[package]]
+name = "goblin"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b363a30c165f666402fe6a3024d3bec7ebc898f96a4a23bd1c99f8dbf3f4f47"
+dependencies = [
+ "log",
+ "plain",
+ "scroll",
+]
+
 [[package]]
 name = "log"
 version = "0.4.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a7a70ba024b9dc04c27ea2f0c0548feb474ec5c54bba33a7f72f873a39d07b24"
 
+[[package]]
+name = "plain"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b4596b6d070b27117e987119b4dac604f3c58cfb0b191112e24771b2faeac1a6"
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.86"
@@ -72,6 +90,26 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "scroll"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ab8598aa408498679922eff7fa985c25d58a90771bd6be794434c5277eab1a6"
+dependencies = [
+ "scroll_derive",
+]
+
+[[package]]
+name = "scroll_derive"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f81c2fde025af7e69b1d1420531c8a8811ca898919db177141a85313b1cb932"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.72",
+]
+
 [[package]]
 name = "syn"
 version = "1.0.109"

Cargo.toml

@@ -6,3 +6,4 @@ edition = "2021"
 [dependencies]
 uefi = { version = "0.29.0", default-features = false, features = [ "alloc", "global_allocator", "panic_handler", "logger" ] }
 log = { version = "0.4.22", default-features = false }
+goblin = { version = "0.8.2", default_features = false, features = [ "elf32", "elf64", "alloc" ] }

src/abi.rs

@@ -0,0 +1,90 @@
+use uefi::proto::console::gop::{GraphicsOutput, PixelFormat};
+
+#[repr(C)]
+pub struct EFIFramebufferParams {
+    pub addr: u64,
+    pub size: u64,
+    pub height: u32,
+    pub width: u32,
+    pub stride: u32,
+    pub mask_red: u32,
+    pub mask_green: u32,
+    pub mask_blue: u32,
+    pub mask_reserved: u32,
+}
+
+impl EFIFramebufferParams {
+    pub fn from_graphics_output(graphics_output: &mut GraphicsOutput) -> Option<Self> {
+        let mode = graphics_output.current_mode_info();
+        let (mask_red, mask_green, mask_blue, mask_reserved) = match mode.pixel_format() {
+            PixelFormat::Rgb => (0x0000_00ff, 0x0000_ff00, 0x00ff_0000, 0xff00_000),
+            PixelFormat::Bgr => (0x00ff_0000, 0x0000_ff00, 0x0000_00ff, 0xff00_000),
+            PixelFormat::Bitmask => {
+                let bitmask = mode.pixel_bitmask()?;
+                (bitmask.red, bitmask.green, bitmask.blue, bitmask.reserved)
+            }
+            _ => return None,
+        };
+
+        let (width, height) = mode.resolution();
+
+        let mut frame_buffer = graphics_output.frame_buffer();
+        let size = frame_buffer.size();
+
+        Some(Self {
+            addr: frame_buffer.as_mut_ptr() as u64,
+            size: size.try_into().ok()?,
+            height: height.try_into().ok()?,
+            width: width.try_into().ok()?,
+            stride: mode.stride().try_into().ok()?,
+            mask_red,
+            mask_green,
+            mask_blue,
+            mask_reserved,
+        })
+    }
+}
+
+#[cfg_attr(target_pointer_width = "64", repr(C, align(8)))]
+#[cfg_attr(target_pointer_width = "32", repr(C, align(4)))]
+pub struct ModuleDirectoryElem<T> {
+    ident: ModInfo,
+    size: u32,
+    data: T,
+}
+
+
+#[repr(C)]
+pub struct FileMetadataElem<T> {
+    size: usize,
+    typ: FileMetadataType,
+    addr: *const T,
+    next: Option<*const FileMetadataElem<T>>,
+    data: T,
+}
+
+#[repr(u32)]
+pub enum ModInfo {
+    End = 0,
+    Name = 1,
+    Type = 2,
+    Addr = 3,
+    Size = 4,
+    Args = 6,
+}
+
+#[repr(u16)]
+pub enum FileMetadataType {
+    AoutExecHeader = 1,
+    ElfHeader = 2,
+    StartSymbols = 3,
+    EndSymbols = 4,
+    Dynamic = 5,
+    MB2Header = 6,
+    SectionHeader = 9,
+    CtorsAddress = 10,
+    CtorsSize = 11,
+    FirmwareHandle = 12,
+    KeyBuffer = 13,
+    Font = 14,
+}

src/main.rs

@@ -1,6 +1,8 @@
 #![no_main]
 #![no_std]
 
+mod abi;
+
 use log::info;
 use uefi::prelude::*;