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feat: Application manager (#8)

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* feat: map text area to kernel memory space, first application_manager
implementation

* feat: start application via application_manager

* feat: terminal, start app by ID

* feat: support CLI args, by applying System V ABI concepts

* refactor: rename terminal to console. Minor cleanup

* docs: README.md
This commit is contained in:
Alexander Neuhäuser
2026-03-27 15:15:49 +01:00
committed by GitHub
parent f33100d36b
commit e712593dae
17 changed files with 357 additions and 91 deletions
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22
src/aarch64/mmu.rs
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@@ -43,7 +43,8 @@ const L2_BLOCK_BITMAP_WORDS: usize = LEVEL2_BLOCK_SIZE / (64 * GRANULARITY);
const MAX_PAGE_COUNT: usize = 1024 * 1024 * 1024 / GRANULARITY;
const TRANSLATION_TABLE_BASE_ADDR: usize = 0xFFFF_FF82_0000_0000;
pub const KERNEL_VIRTUAL_MEM_SPACE: usize = 0xFFFF_FF80_0000_0000;
#[no_mangle]
pub static KERNEL_VIRTUAL_MEM_SPACE: usize = 0xFFFF_FF80_0000_0000;
pub const STACK_START_ADDR: usize = !KERNEL_VIRTUAL_MEM_SPACE & (!0xF);
@@ -104,7 +105,7 @@ pub enum PhysSource {
}
#[repr(align(4096))]
pub struct PageTable([TableEntry; TABLE_ENTRY_COUNT]);
pub struct PageTable(pub [TableEntry; TABLE_ENTRY_COUNT]);
impl Iterator for PageTable {
type Item = VirtAddr;
@@ -203,7 +204,6 @@ fn map_range_dynamic(
(virt, _) = virt.overflowing_add(GRANULARITY);
remaining -= GRANULARITY;
}
Ok(())
}
@@ -223,7 +223,7 @@ pub fn alloc_page(
/// Allocate a singe page in one block.
pub fn find_free_kerne_page_in_block(start: VirtAddr) -> Result<VirtAddr, NovaError> {
if !start.is_multiple_of(GRANULARITY) {
if !start.is_multiple_of(LEVEL2_BLOCK_SIZE) {
return Err(NovaError::Misalignment);
}
@@ -237,8 +237,8 @@ pub fn find_free_kerne_page_in_block(start: VirtAddr) -> Result<VirtAddr, NovaEr
)?
};
if let Some(virt_addr) = table.next() {
return Ok(virt_addr);
if let Some(offset) = table.next() {
return Ok(start + (offset * GRANULARITY));
}
Err(NovaError::OutOfMeomory)
}
@@ -273,7 +273,7 @@ pub fn map_page(
let table = unsafe { &mut *table_ptr };
if !table.0[l3_off].is_invalid() {
return Err(NovaError::Paging);
return Err(NovaError::Paging("Page already occupied."));
}
table.0[l3_off] = TableEntry::page_descriptor(physical_address, additional_flags);
@@ -315,7 +315,7 @@ pub fn map_l2_block(
// Verify virtual address is available.
if !table.0[l2_off].is_invalid() {
return Err(NovaError::Paging);
return Err(NovaError::Paging("Block already occupied."));
}
let new_entry = TableEntry::block_descriptor(physical_address, additional_flags);
@@ -392,7 +392,7 @@ fn next_table(
match table.0[offset].value & 0b11 {
0 => {
if !create_missing {
return Err(NovaError::Paging);
return Err(NovaError::Paging("No table defined."));
}
let new_phys_page_table_address = reserve_page();
@@ -406,7 +406,9 @@ fn next_table(
Ok(resolve_table_addr(table.0[offset].address()) as *mut PageTable)
}
1 => Err(NovaError::Paging),
1 => Err(NovaError::Paging(
"Can't navigate table due to block mapping.",
)),
3 => Ok(resolve_table_addr(table.0[offset].address()) as *mut PageTable),
_ => unreachable!(),
}