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Reserve more regions in linux-legacy32

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Ruihan Li 2025-03-24 14:37:05 +08:00 committed by Tate, Hongliang Tian
parent 58980d4c55
commit 344ce59ca3
1 changed files with 20 additions and 5 deletions
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25
ostd/libs/linux-bzimage/setup/src/x86/legacy_i386/alloc.rs
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@ -22,17 +22,32 @@ pub(super) unsafe fn init(boot_params: &'static linux_boot_params::BootParams) {
assert!(state.is_none());
let mut used = core::array::from_fn(|_| 0..0);
extern "C" {
fn __executable_start();
fn __executable_end();
}
let mut used = core::array::from_fn(|_| 0..0);
used[0] = (__executable_start as usize)..(__executable_end as usize);
used[1] = {
let params_addr = core::ptr::from_ref(boot_params).addr();
params_addr..(params_addr + core::mem::size_of::<linux_boot_params::BootParams>())
};
fn range_from_start_and_len(start: usize, len: usize) -> Range<usize> {
start..start.checked_add(len).unwrap()
}
used[1] = range_from_start_and_len(
core::ptr::from_ref(boot_params).addr(),
core::mem::size_of::<linux_boot_params::BootParams>(),
);
// No need to worry about `ext_*` addresses/sizes since we're 32-bit.
used[2] = range_from_start_and_len(
boot_params.hdr.cmd_line_ptr as usize,
boot_params.hdr.cmdline_size as usize,
);
used[3] = range_from_start_and_len(
boot_params.hdr.ramdisk_image as usize,
boot_params.hdr.ramdisk_size as usize,
);
*state = Some(State {
e820: &boot_params.e820_table[..(boot_params.e820_entries as usize)],