GKaszewski/k-os
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feat(kernel): console cap gates DebugPutchar, no uart fast path; spawn start arg in a0; delegate returns slot

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This commit is contained in:
Gabriel Kaszewski
2026-10-27 14:54:36 +01:00
parent 33e1c849d1
commit 7415bab7f5
31 changed files with 290 additions and 64 deletions
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15
crates/init/src/lib.rs
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@@ -111,6 +111,7 @@ const SERVERS: &[ServerInfo] = &[
];
pub fn run() -> ! {
libkos::start::set_console(devices::console());
libkos::println!("init: started (pid={:#x})", syscall::get_process_id().raw());
// Drivers wait for their device before serving, so this comes first:
@@ -151,7 +152,7 @@ pub fn run() -> ! {
if let Some(ep_cap) = syscall::create_endpoint() {
syscall::delegate(ep_cap, loaded.process_cap, ipc_perms);
syscall::spawn_thread_in(loaded.process_cap, loaded.entry_point, USER_STACK_TOP);
start(&loaded, true);
}
libkos::println!("ok (entry={:#x})", loaded.entry_point.raw());
@@ -171,7 +172,7 @@ pub fn run() -> ! {
let client = PermissionSet::empty().with(Permission::Execute);
syscall::delegate(INPUT_EP, snake.process_cap, client);
syscall::delegate(DISPLAY_EP, snake.process_cap, client);
syscall::spawn_thread_in(snake.process_cap, snake.entry_point, USER_STACK_TOP);
start(&snake, false);
libkos::println!("ok");
} else {
libkos::println!("SKIP");
@@ -182,6 +183,16 @@ pub fn run() -> ! {
idle();
}
/// Starts `program`, lending it init's console if `console`.
pub(crate) fn start(program: &LoadedProcess, console: bool) {
let write = PermissionSet::empty().with(Permission::Write);
let slot = libkos::start::console()
.filter(|_| console)
.and_then(|c| syscall::delegate(c, program.process_cap, write));
let arg = types::start_arg::encode(slot, None);
syscall::spawn_thread_in(program.process_cap, program.entry_point, USER_STACK_TOP, arg);
}
/// A region of init's own to read program files into.
fn scratch() -> Option<&'static mut [u8]> {
let region = syscall::create_region(PageCount::new(SCRATCH_PAGES)?).ok()?;