// SPDX-License-Identifier: GPL-2.0 // Copyright (C) 2025 Google LLC. use crate::transaction::Transaction; use core::ptr; use kernel::bindings::{rust_binder_transaction, task_struct};use kernel::error::Result;use kernel::ffi::{c_int, c_uint, c_ulong};use kernel::task::Task;use kernel::tracepoint::declare_trace; declare_trace! { unsafe fn binder_ioctl(cmd: c_uint, arg: c_ulong); unsafe fn binder_ioctl_done(ret: c_int); unsafe fn binder_read_done(ret: c_int); unsafe fn binder_write_done(ret: c_int); unsafe fn binder_wait_for_work(proc_work: bool, transaction_stack: bool, thread_todo: bool); unsafe fn binder_transaction(reply: bool, t: rust_binder_transaction, thread: *mut task_struct); unsafe fn binder_transaction_received(t: rust_binder_transaction); unsafe fn binder_transaction_fd_send(t_debug_id: c_int, fd: c_int, offset: usize); unsafe fn binder_transaction_fd_recv(t_debug_id: c_int, fd: c_int, offset: usize); unsafe fn binder_command(cmd: u32); unsafe fn binder_return(ret: u32);} #[inline]fn raw_transaction(t: &Transaction) -> rust_binder_transaction { ptr::from_ref(t).cast_mut().cast()} #[inline]fn to_errno(ret: Result) -> i32 { match ret { Ok(()) => 0, Err(err) => err.to_errno(), }} #[inline]pub(crate) fn trace_ioctl(cmd: u32, arg: usize) { // SAFETY: Always safe to call. unsafe { binder_ioctl(cmd, arg as c_ulong) }} #[inline]pub(crate) fn trace_ioctl_done(ret: Result) { // SAFETY: Always safe to call. unsafe { binder_ioctl_done(to_errno(ret)) }}#[inline]pub(crate) fn trace_read_done(ret: Result) { // SAFETY: Always safe to call. unsafe { binder_read_done(to_errno(ret)) }}#[inline]pub(crate) fn trace_write_done(ret: Result) { // SAFETY: Always safe to call. unsafe { binder_write_done(to_errno(ret)) }} #[inline]pub(crate) fn trace_wait_for_work(proc_work: bool, transaction_stack: bool, thread_todo: bool) { // SAFETY: Always safe to call. unsafe { binder_wait_for_work(proc_work, transaction_stack, thread_todo) }} #[inline]pub(crate) fn trace_transaction(reply: bool, t: &Transaction, thread: Option<&Task>) { let thread = match thread { Some(thread) => thread.as_ptr(), None => core::ptr::null_mut(), }; // SAFETY: The raw transaction is valid for the duration of this call. The thread pointer is // valid or null. unsafe { binder_transaction(reply, raw_transaction(t), thread) }} #[inline]pub(crate) fn trace_transaction_received(t: &Transaction) { // SAFETY: The raw transaction is valid for the duration of this call. unsafe { binder_transaction_received(raw_transaction(t)) }} #[inline]pub(crate) fn trace_transaction_fd_send(t_debug_id: usize, fd: u32, offset: usize) { // SAFETY: This function is always safe to call. unsafe { binder_transaction_fd_send(t_debug_id as c_int, fd as c_int, offset) }}#[inline]pub(crate) fn trace_transaction_fd_recv(t_debug_id: usize, fd: u32, offset: usize) { // SAFETY: This function is always safe to call. unsafe { binder_transaction_fd_recv(t_debug_id as c_int, fd as c_int, offset) }} #[inline]pub(crate) fn trace_command(cmd: u32) { // SAFETY: This function is always safe to call. unsafe { binder_command(cmd) }}#[inline]pub(crate) fn trace_return(ret: u32) { // SAFETY: This function is always safe to call. unsafe { binder_return(ret) }}
// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2025 Google LLC.
use crate::transaction::Transaction;
use core::ptr;
use kernel::bindings::{rust_binder_transaction, task_struct};
use kernel::error::Result;
use kernel::ffi::{c_int, c_uint, c_ulong};
use kernel::task::Task;
use kernel::tracepoint::declare_trace;
declare_trace! {
unsafe fn binder_ioctl(cmd: c_uint, arg: c_ulong);
unsafe fn binder_ioctl_done(ret: c_int);
unsafe fn binder_read_done(ret: c_int);
unsafe fn binder_write_done(ret: c_int);
unsafe fn binder_wait_for_work(proc_work: bool, transaction_stack: bool, thread_todo: bool);
unsafe fn binder_transaction(reply: bool, t: rust_binder_transaction, thread: *mut task_struct);
unsafe fn binder_transaction_received(t: rust_binder_transaction);
unsafe fn binder_transaction_fd_send(t_debug_id: c_int, fd: c_int, offset: usize);
unsafe fn binder_transaction_fd_recv(t_debug_id: c_int, fd: c_int, offset: usize);
unsafe fn binder_command(cmd: u32);
unsafe fn binder_return(ret: u32);
}
#[inline]
fn raw_transaction(t: &Transaction) -> rust_binder_transaction {
ptr::from_ref(t).cast_mut().cast()
}
#[inline]
fn to_errno(ret: Result) -> i32 {
match ret {
Ok(()) => 0,
Err(err) => err.to_errno(),
}
}
#[inline]
pub(crate) fn trace_ioctl(cmd: u32, arg: usize) {
// SAFETY: Always safe to call.
unsafe { binder_ioctl(cmd, arg as c_ulong) }
}
#[inline]
pub(crate) fn trace_ioctl_done(ret: Result) {
// SAFETY: Always safe to call.
unsafe { binder_ioctl_done(to_errno(ret)) }
}
#[inline]
pub(crate) fn trace_read_done(ret: Result) {
// SAFETY: Always safe to call.
unsafe { binder_read_done(to_errno(ret)) }
}
#[inline]
pub(crate) fn trace_write_done(ret: Result) {
// SAFETY: Always safe to call.
unsafe { binder_write_done(to_errno(ret)) }
}
#[inline]
pub(crate) fn trace_wait_for_work(proc_work: bool, transaction_stack: bool, thread_todo: bool) {
// SAFETY: Always safe to call.
unsafe { binder_wait_for_work(proc_work, transaction_stack, thread_todo) }
}
#[inline]
pub(crate) fn trace_transaction(reply: bool, t: &Transaction, thread: Option<&Task>) {
let thread = match thread {
Some(thread) => thread.as_ptr(),
None => core::ptr::null_mut(),
};
// SAFETY: The raw transaction is valid for the duration of this call. The thread pointer is
// valid or null.
unsafe { binder_transaction(reply, raw_transaction(t), thread) }
}
#[inline]
pub(crate) fn trace_transaction_received(t: &Transaction) {
// SAFETY: The raw transaction is valid for the duration of this call.
unsafe { binder_transaction_received(raw_transaction(t)) }
}
#[inline]
pub(crate) fn trace_transaction_fd_send(t_debug_id: usize, fd: u32, offset: usize) {
// SAFETY: This function is always safe to call.
unsafe { binder_transaction_fd_send(t_debug_id as c_int, fd as c_int, offset) }
}
#[inline]
pub(crate) fn trace_transaction_fd_recv(t_debug_id: usize, fd: u32, offset: usize) {
// SAFETY: This function is always safe to call.
unsafe { binder_transaction_fd_recv(t_debug_id as c_int, fd as c_int, offset) }
}
#[inline]
pub(crate) fn trace_command(cmd: u32) {
// SAFETY: This function is always safe to call.
unsafe { binder_command(cmd) }
}
#[inline]
pub(crate) fn trace_return(ret: u32) {
// SAFETY: This function is always safe to call.
unsafe { binder_return(ret) }
}