51 lines
1.6 KiB
Rust
51 lines
1.6 KiB
Rust
// SPDX-License-Identifier: MPL-2.0
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use aster_util::printer::VmPrinter;
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use super::TidDirOps;
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use crate::{
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fs::{
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procfs::template::{FileOps, ProcFileBuilder},
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utils::{Inode, mkmod},
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},
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prelude::*,
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process::{Process, posix_thread::AsPosixThread},
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vm::vmar::{VMAR_CAP_ADDR, VMAR_LOWEST_ADDR},
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};
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/// Represents the inode at `/proc/[pid]/task/[tid]/maps` (and also `/proc/[pid]/maps`).
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pub struct MapsFileOps(Arc<Process>);
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impl MapsFileOps {
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pub fn new_inode(dir: &TidDirOps, parent: Weak<dyn Inode>) -> Arc<dyn Inode> {
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let process_ref = dir.process_ref.clone();
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// Reference: <https://elixir.bootlin.com/linux/v6.16.5/source/fs/proc/base.c#L3343>
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ProcFileBuilder::new(Self(process_ref), mkmod!(a+r))
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.parent(parent)
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.build()
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.unwrap()
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}
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}
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impl FileOps for MapsFileOps {
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fn read_at(&self, offset: usize, writer: &mut VmWriter) -> Result<usize> {
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let mut printer = VmPrinter::new_skip(writer, offset);
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let vmar_guard = self.0.lock_vmar();
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let Some(vmar) = vmar_guard.as_ref() else {
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return_errno_with_message!(Errno::ESRCH, "the process has exited");
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};
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let current = current_thread!();
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let fs_ref = current.as_posix_thread().unwrap().read_fs();
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let path_resolver = fs_ref.resolver().read();
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let guard = vmar.query(VMAR_LOWEST_ADDR..VMAR_CAP_ADDR);
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for vm_mapping in guard.iter() {
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vm_mapping.print_to_maps(&mut printer, vmar, &path_resolver)?;
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}
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Ok(printer.bytes_written())
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}
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}
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