oyster.cafe
Nothing to see here, move along
1use crate::error::KernelError;
2use crate::proc::context::CpuContext;
3use crate::syscall::{SyscallResult, try_syscall};
4
5pub fn sys_module_info(ctx: &mut CpuContext) {
6 let module_index = ctx.rdi;
7 let user_buf = ctx.rsi;
8 let buf_len = ctx.rdx;
9
10 let modules = match crate::arch::boot::modules() {
11 Some(m) => m,
12 None => {
13 ctx.rax = SyscallResult::error(KernelError::NotFound).raw();
14 return;
15 }
16 };
17
18 if module_index == u64::MAX {
19 ctx.rax = SyscallResult::success(modules.len() as u64).raw();
20 return;
21 }
22
23 if module_index >= modules.len() as u64 {
24 ctx.rax = SyscallResult::error(KernelError::InvalidParameter).raw();
25 return;
26 }
27 let idx = module_index as usize;
28
29 let path = modules[idx].path();
30 let path_bytes = path.to_bytes();
31 let copy_len = path_bytes.len().min(buf_len as usize);
32
33 if copy_len > 0 && user_buf != 0 {
34 let irq = match crate::sync::InterruptsDisabledToken::new_checked() {
35 Some(tok) => tok,
36 None => {
37 x86_64::instructions::interrupts::disable();
38 match crate::sync::InterruptsDisabledToken::new_checked() {
39 Some(tok) => tok,
40 None => {
41 ctx.rax = SyscallResult::error(KernelError::BadState).raw();
42 return;
43 }
44 }
45 }
46 };
47 try_syscall!(
48 ctx,
49 crate::syscall::copy_to_user(user_buf, &path_bytes[..copy_len], copy_len, &irq)
50 );
51 }
52
53 ctx.rax = SyscallResult::success(path_bytes.len() as u64).raw();
54}