1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
//! count — stream-input consumer (ADR 0006 Phase 3 gate).
//!
//! Reads lines through `get_line` until EOF or Abort, then reports how
//! many it saw via `put_line`. Proves: USE pre-drain, TIL truncation,
//! interactive pumping, and ^C abort across the task boundary.
#![no_std]
#![no_main]
use rsapi::{Exports, StreamResult};
#[panic_handler]
fn panic(_info: &core::panic::PanicInfo) -> ! {
loop {
core::hint::spin_loop();
}
}
fn put_u32(exports: &Exports, mut v: u32) {
// Small fixed buffer; u32 max is 10 digits.
let mut buf = [0u8; 10];
let mut i = buf.len();
if v == 0 {
i -= 1;
buf[i] = b'0';
}
while v > 0 {
i -= 1;
buf[i] = b'0' + (v % 10) as u8;
v /= 10;
}
let suffix = b" line(s)";
let mut msg = [0u8; 18];
let n = buf.len() - i;
msg[..n].copy_from_slice(&buf[i..]);
msg[n..n + suffix.len()].copy_from_slice(suffix);
(exports.put_line)(rsapi::Line {
ptr: msg.as_ptr(),
len: n + suffix.len(),
});
}
/// The image entry point — the loader jumps here with the ABI arguments.
#[unsafe(no_mangle)]
pub extern "C" fn efi_main(
exports: &'static Exports,
_argc: usize,
_argv: *const rsapi::Arg,
) -> i32 {
let mut count: u32 = 0;
loop {
let mut line = rsapi::Line {
ptr: core::ptr::null(),
len: 0,
};
match (exports.get_line)(&mut line) {
StreamResult::Line => count += 1,
StreamResult::Eof => break,
StreamResult::Abort => return 130, // 128+SIGINT convention
}
}
put_u32(exports, count);
0
}
|
