multiboot2: Support setting Boot Services not exited tag

Author: YtvwlD

multiboot2/src/builder/information.rs

@@ -2,8 +2,9 @@
 use crate::builder::traits::StructAsBytes;
 use crate::{
     BasicMemoryInfoTag, BootInformationInner, BootLoaderNameTag, CommandLineTag,
-    EFISdt32, EFISdt64, EFIMemoryMapTag, ElfSectionsTag, EndTag, FramebufferTag,
-    MemoryMapTag, ModuleTag, RsdpV1Tag, RsdpV2Tag, SmbiosTag,
+    EFISdt32, EFISdt64, EFIBootServicesNotExited, EFIMemoryMapTag,
+    ElfSectionsTag, EndTag, FramebufferTag, MemoryMapTag, ModuleTag, RsdpV1Tag,
+    RsdpV2Tag, SmbiosTag,
 };
 
 use alloc::boxed::Box;
@@ -18,6 +19,7 @@ pub struct Multiboot2InformationBuilder {
     basic_memory_info_tag: Option<BasicMemoryInfoTag>,
     boot_loader_name_tag: Option<Box<BootLoaderNameTag>>,
     command_line_tag: Option<Box<CommandLineTag>>,
+    efi_boot_services_not_exited: Option<EFIBootServicesNotExited>,
     efi_memory_map_tag: Option<Box<EFIMemoryMapTag>>,
     elf_sections_tag: Option<Box<ElfSectionsTag>>,
     framebuffer_tag: Option<Box<FramebufferTag>>,
@@ -38,6 +40,7 @@ impl Multiboot2InformationBuilder {
             command_line_tag: None,
             efisdt32: None,
             efisdt64: None,
+            efi_boot_services_not_exited: None,
             efi_memory_map_tag: None,
             elf_sections_tag: None,
             framebuffer_tag: None,
@@ -85,6 +88,9 @@ impl Multiboot2InformationBuilder {
         if let Some(tag) = &self.efisdt64 {
             len += Self::size_or_up_aligned(tag.byte_size())
         }
+        if let Some(tag) = &self.efi_boot_services_not_exited {
+            len += Self::size_or_up_aligned(tag.byte_size())
+        }
         if let Some(tag) = &self.efi_memory_map_tag {
             len += Self::size_or_up_aligned(tag.byte_size())
         }
@@ -156,6 +162,9 @@ impl Multiboot2InformationBuilder {
         if let Some(tag) = self.efisdt64.as_ref() {
             Self::build_add_bytes(&mut data, &tag.struct_as_bytes(), false)
         }
+        if let Some(tag) = self.efi_boot_services_not_exited.as_ref() {
+            Self::build_add_bytes(&mut data, &tag.struct_as_bytes(), false)
+        }
         if let Some(tag) = self.efi_memory_map_tag.as_ref() {
             Self::build_add_bytes(&mut data, &tag.struct_as_bytes(), false)
         }
@@ -206,6 +215,10 @@ impl Multiboot2InformationBuilder {
         self.efisdt64 = Some(efisdt64);
     }
 
+    pub fn efi_boot_services_not_exited(&mut self) {
+        self.efi_boot_services_not_exited = Some(EFIBootServicesNotExited::new());
+    }
+
     pub fn efi_memory_map_tag(&mut self, efi_memory_map_tag: Box<EFIMemoryMapTag>) {
         self.efi_memory_map_tag = Some(efi_memory_map_tag);
     }

multiboot2/src/lib.rs

@@ -55,8 +55,9 @@ pub use elf_sections::{
 pub use framebuffer::{FramebufferColor, FramebufferField, FramebufferTag, FramebufferType};
 pub use image_load_addr::ImageLoadPhysAddr;
 pub use memory_map::{
-    BasicMemoryInfoTag, EFIMemoryAreaType, EFIMemoryDesc, EFIMemoryMapTag,
-    MemoryArea, MemoryAreaIter, MemoryAreaType, MemoryMapTag,
+    BasicMemoryInfoTag, EFIBootServicesNotExited, EFIMemoryAreaType,
+    EFIMemoryDesc, EFIMemoryMapTag, MemoryArea, MemoryAreaIter, MemoryAreaType,
+    MemoryMapTag,
 };
 pub use module::{ModuleIter, ModuleTag};
 pub use rsdp::{RsdpV1Tag, RsdpV2Tag};

multiboot2/src/memory_map.rs

@@ -480,10 +480,27 @@ impl Default for EFIMemoryDesc {
 #[derive(Debug)]
 #[repr(C)]
 pub struct EFIBootServicesNotExited {
-    typ: u32,
+    typ: TagType,
     size: u32,
 }
 
+impl EFIBootServicesNotExited {
+    #[cfg(feature = "builder")]
+    pub fn new() -> Self {
+        Self {
+            typ: TagType::EfiBs,
+            size: mem::size_of::<Self>().try_into().unwrap(),
+        }
+    }
+}
+
+#[cfg(feature = "builder")]
+impl StructAsBytes for EFIBootServicesNotExited {
+    fn byte_size(&self) -> usize {
+        mem::size_of::<Self>()
+    }
+}
+
 /// An iterator over ALL EFI memory areas.
 #[derive(Clone, Debug)]
 pub struct EFIMemoryAreaIter<'a> {