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Merge pull request #304 from AlexJMohr/cargo-features
Add bios and uefi cargo features (closes #287)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| use crate::fat; | ||
| use anyhow::Context; | ||
| use std::{ | ||
| collections::BTreeMap, | ||
| path::{Path, PathBuf}, | ||
| }; | ||
| use tempfile::NamedTempFile; | ||
|
|
||
| mod mbr; | ||
|
|
||
| const BIOS_STAGE_3: &str = "boot-stage-3"; | ||
| const BIOS_STAGE_4: &str = "boot-stage-4"; | ||
|
|
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| /// Create disk images for booting on legacy BIOS systems. | ||
| pub struct BiosBoot { | ||
| kernel: PathBuf, | ||
| } | ||
|
|
||
| impl BiosBoot { | ||
| /// Start creating a disk image for the given bootloader ELF executable. | ||
| pub fn new(kernel_path: &Path) -> Self { | ||
| Self { | ||
| kernel: kernel_path.to_owned(), | ||
| } | ||
| } | ||
|
|
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| /// Create a bootable UEFI disk image at the given path. | ||
| pub fn create_disk_image(&self, out_path: &Path) -> anyhow::Result<()> { | ||
| let bootsector_path = Path::new(env!("BIOS_BOOT_SECTOR_PATH")); | ||
| let stage_2_path = Path::new(env!("BIOS_STAGE_2_PATH")); | ||
|
|
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| let fat_partition = self | ||
| .create_fat_partition() | ||
| .context("failed to create FAT partition")?; | ||
|
|
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| mbr::create_mbr_disk( | ||
| bootsector_path, | ||
| stage_2_path, | ||
| fat_partition.path(), | ||
| out_path, | ||
| ) | ||
| .context("failed to create BIOS MBR disk image")?; | ||
|
|
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| fat_partition | ||
| .close() | ||
| .context("failed to delete FAT partition after disk image creation")?; | ||
|
|
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| Ok(()) | ||
| } | ||
|
|
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| /// Creates an BIOS-bootable FAT partition with the kernel. | ||
| fn create_fat_partition(&self) -> anyhow::Result<NamedTempFile> { | ||
| let stage_3_path = Path::new(env!("BIOS_STAGE_3_PATH")); | ||
| let stage_4_path = Path::new(env!("BIOS_STAGE_4_PATH")); | ||
|
|
||
| let mut files = BTreeMap::new(); | ||
| files.insert(crate::KERNEL_FILE_NAME, self.kernel.as_path()); | ||
| files.insert(BIOS_STAGE_3, stage_3_path); | ||
| files.insert(BIOS_STAGE_4, stage_4_path); | ||
|
|
||
| let out_file = NamedTempFile::new().context("failed to create temp file")?; | ||
| fat::create_fat_filesystem(files, out_file.path()) | ||
| .context("failed to create BIOS FAT filesystem")?; | ||
|
|
||
| Ok(out_file) | ||
| } | ||
| } |
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