GKaszewski/k-os
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feat(users): per-user sealed folders users/<id>/{home,apps,data,permissions}; storage SET_USER/LOCK/PURGE; init sign-in/sign-out loop (purge fresh/removed/guest, seed from factory, session start/stop); shell logout; pm user+system app shelves; terminal SIGNED_OUT; per-program stack (gatekeeper 12p); 128K load scratch

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This commit is contained in:
Gabriel Kaszewski
2026-10-28 01:08:50 +01:00
parent 29a25bd8c2
commit 91f7d28834
38 changed files with 1156 additions and 378 deletions
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19
crates/init/src/load.rs
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@@ -8,12 +8,15 @@ use types::budget::Limits;
const PAGE_SIZE: usize = 4096;
const USER_CODE_BASE: usize = 0x10000;
const USER_STACK_PAGES: usize = 4;
/// A program's stack, below its image, unless its manifest says more.
pub(crate) const STACK_PAGES: usize = 4;
/// The most there is room for under the image (page 0 stays unmapped).
const MAX_STACK_PAGES: usize = USER_CODE_BASE / PAGE_SIZE - 1;
const CREATE_CAP: CapSlot = CapSlot::const_new(0);
/// Where a program file is read to before it is loaded (16 pages: the
/// largest program init will load).
const SCRATCH_VA: VirtualAddress = VirtualAddress::from_raw(0x30000);
const SCRATCH_PAGES: u16 = 16;
/// Where a program file is read to before it is loaded (32 pages: the
/// largest program init will load; the gatekeeper is past 16).
const SCRATCH_VA: VirtualAddress = VirtualAddress::from_raw(0x0120_0000);
const SCRATCH_PAGES: u16 = 32;
pub(crate) struct LoadedProcess {
pub(crate) process_cap: CapSlot,
@@ -35,7 +38,9 @@ pub(crate) fn load_binary(
scratch: &mut [u8],
filename: &[u8],
limits: Limits,
stack_pages: usize,
) -> Option<LoadedProcess> {
let stack_pages = stack_pages.min(MAX_STACK_PAGES);
let file_size = read_file(storage, scratch, filename)?;
let elf_data = &scratch[..file_size];
let elf_info = match elf::parse(elf_data) {
@@ -71,10 +76,10 @@ pub(crate) fn load_binary(
}
}
for i in 0..USER_STACK_PAGES {
for i in 0..stack_pages {
let page_count = PageCount::new(1)?;
let stack_va = syscall::request_pages(page_count)?;
let dst = VirtualAddress::from_raw(USER_CODE_BASE - (USER_STACK_PAGES - i) * PAGE_SIZE);
let dst = VirtualAddress::from_raw(USER_CODE_BASE - (stack_pages - i) * PAGE_SIZE);
syscall::map_page(process_cap, stack_va, dst, false);
}