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use crate::config::{CLOCK_FREQ, MMAP_BASE, PAGE_SIZE};
use crate::mm::{
copy_from_user, copy_to_user, copy_to_user_string, mmap, munmap, sbrk, translated_byte_buffer,
translated_ref, translated_refmut, translated_str, MapFlags, MapPermission, UserBuffer,
};
use crate::show_frame_consumption;
use crate::syscall::errno::*;
use crate::task::{
add_task, block_current_and_run_next, current_task, current_user_token,
exit_current_and_run_next, find_task_by_pid, procs_count, signal::*,
suspend_current_and_run_next, wake_interruptible, Rusage, TaskStatus,
};
use crate::timer::{
get_time, get_time_ms, get_time_sec, ITimerVal, TimeSpec, TimeVal, TimeZone, Times,
NSEC_PER_SEC,
};
use crate::trap::TrapContext;
use alloc::string::String;
use alloc::sync::Arc;
use alloc::vec::Vec;
use core::mem::size_of;
use log::{debug, error, info, trace, warn};
use num_enum::FromPrimitive;
pub fn sys_exit(exit_code: u32) -> ! {
exit_current_and_run_next((exit_code & 0xff) << 8);
}
#[allow(non_camel_case_types)]
#[derive(Debug, Eq, PartialEq, FromPrimitive)]
#[repr(u32)]
pub enum SyslogAction {
CLOSE = 0,
OPEN = 1,
READ = 2,
READ_ALL = 3,
READ_CLEAR = 4,
CLEAR = 5,
CONSOLE_OFF = 6,
CONSOLE_ON = 7,
CONSOLE_LEVEL = 8,
SIZE_UNREAD = 9,
SIZE_BUFFER = 10,
#[default]
ILLEAGAL,
}
pub fn sys_syslog(type_: u32, buf: *mut u8, len: u32) -> isize {
const LOG_BUF_LEN: usize = 4096;
const LOG: &str = "<5>[ 0.000000] Linux version 5.10.102.1-microsoft-standard-WSL2 (rtrt@TEAM-NPUCORE) (gcc (Ubuntu 9.4.0-1ubuntu1~20.04) 9.4.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #1 SMP Thu Mar 10 13:31:47 CST 2022";
let token = current_user_token();
let type_ = SyslogAction::from(type_);
let len = LOG.len().min(len as usize);
match type_ {
SyslogAction::CLOSE | SyslogAction::OPEN => SUCCESS,
SyslogAction::READ => {
copy_to_user_string(token, &LOG[..len], buf);
len as isize
}
SyslogAction::READ_ALL => {
copy_to_user_string(token, &LOG[LOG.len() - len..], buf);
len as isize
}
SyslogAction::READ_CLEAR => todo!(),
SyslogAction::CLEAR => todo!(),
SyslogAction::CONSOLE_OFF => todo!(),
SyslogAction::CONSOLE_ON => todo!(),
SyslogAction::CONSOLE_LEVEL => todo!(),
SyslogAction::SIZE_UNREAD => todo!(),
SyslogAction::SIZE_BUFFER => LOG_BUF_LEN as isize,
SyslogAction::ILLEAGAL => EINVAL,
}
}
pub fn sys_yield() -> isize {
suspend_current_and_run_next();
0
}
pub fn sys_kill(pid: usize, sig: usize) -> isize {
let signal = match Signals::from_signum(sig) {
Ok(signal) => signal,
Err(_) => return EINVAL,
};
if pid > 0 {
if let Some(task) = find_task_by_pid(pid) {
if let Some(signal) = signal {
let mut inner = task.acquire_inner_lock();
inner.add_signal(signal);
if inner.task_status == TaskStatus::Interruptible {
inner.task_status = TaskStatus::Ready;
wake_interruptible(task.clone());
}
}
SUCCESS
} else {
ESRCH
}
} else if pid == 0 {
todo!()
} else if (pid as isize) == -1 {
todo!()
} else {
todo!()
}
}
pub fn sys_nanosleep(req: *const TimeSpec, rem: *mut TimeSpec) -> isize {
if req as usize == 0 {
return EINVAL;
}
let token = current_user_token();
let start = TimeSpec::now();
let len = &mut TimeSpec::new();
copy_from_user(token, req, len);
let end = start + *len;
if rem as usize == 0 {
while !(end - TimeSpec::now()).is_zero() {
suspend_current_and_run_next();
}
} else {
let task = current_task().unwrap();
let mut remain = end - TimeSpec::now();
while !remain.is_zero() {
let inner = task.acquire_inner_lock();
if inner
.siginfo
.signal_pending
.difference(inner.sigmask)
.is_empty()
{
drop(inner);
suspend_current_and_run_next();
} else {
copy_to_user(token, &remain, rem);
return EINTR;
}
remain = end - TimeSpec::now();
}
}
SUCCESS
}
pub fn sys_setitimer(
which: usize,
new_value: *const ITimerVal,
old_value: *mut ITimerVal,
) -> isize {
info!(
"[sys_setitimer] which: {}, new_value: {:?}, old_value: {:?}",
which, new_value, old_value
);
match which {
0..=2 => {
let task = current_task().unwrap();
let mut inner = task.acquire_inner_lock();
let token = inner.get_user_token();
if old_value as usize != 0 {
copy_to_user(token, &inner.timer[which], old_value);
trace!("[sys_setitimer] *old_value: {:?}", inner.timer[which]);
}
if new_value as usize != 0 {
copy_from_user(token, new_value, &mut inner.timer[which]);
trace!("[sys_setitimer] *new_value: {:?}", inner.timer[which]);
}
0
}
_ => -1,
}
}
pub fn sys_get_time_of_day(time_val: *mut TimeVal, time_zone: *mut TimeZone) -> isize {
let ans = &TimeVal::now();
if time_val as usize != 0 {
copy_to_user(current_user_token(), ans, time_val);
}
0
}
pub fn sys_get_time() -> isize {
get_time_ms() as isize
}
#[allow(unused)]
pub struct UTSName {
sysname: [u8; 65],
nodename: [u8; 65],
release: [u8; 65],
version: [u8; 65],
machine: [u8; 65],
domainname: [u8; 65],
}
pub fn sys_uname(buf: *mut u8) -> isize {
let token = current_user_token();
let mut buffer = UserBuffer::new(translated_byte_buffer(token, buf, size_of::<UTSName>()));
const FIELD_OFFSET: usize = 65;
buffer.write_at(FIELD_OFFSET * 0, b"Linux\0");
buffer.write_at(FIELD_OFFSET * 1, b"debian\0");
buffer.write_at(FIELD_OFFSET * 2, b"5.10.0-7-riscv64\0");
buffer.write_at(FIELD_OFFSET * 3, b"#1 SMP Debian 5.10.40-1 (2021-05-28)\0");
buffer.write_at(FIELD_OFFSET * 4, b"riscv64\0");
buffer.write_at(FIELD_OFFSET * 5, b"\0");
SUCCESS
}
pub fn sys_getpid() -> isize {
let pid = current_task().unwrap().pid.0;
pid as isize
}
pub fn sys_getppid() -> isize {
let task = current_task().unwrap();
let inner = task.acquire_inner_lock();
let ppid = inner.parent.as_ref().unwrap().upgrade().unwrap().pid.0;
ppid as isize
}
pub fn sys_getuid() -> isize {
0
}
pub fn sys_geteuid() -> isize {
0
}
pub fn sys_getgid() -> isize {
0
}
pub fn sys_getegid() -> isize {
0
}
pub fn sys_setpgid(pid: usize, pgid: usize) -> isize {
let task = crate::task::find_task_by_pid(pid);
match task {
Some(task) => task.setpgid(pgid),
None => -1,
}
}
pub fn sys_getpgid(pid: usize) -> isize {
let task = crate::task::find_task_by_pid(pid);
match task {
Some(task) => task.getpgid() as isize,
None => -1,
}
}
pub fn sys_gettid() -> isize {
current_task().unwrap().pid.0 as isize
}
#[derive(Clone, Copy, Debug)]
#[repr(C)]
pub struct Sysinfo {
uptime: usize,
loads: [usize; 3],
totalram: usize,
freeram: usize,
sharedram: usize,
bufferram: usize,
totalswap: usize,
freeswap: usize,
procs: u16,
totalhigh: usize,
freehigh: usize,
mem_unit: u32,
}
pub fn sys_sysinfo(info: *mut Sysinfo) -> isize {
const LINUX_SYSINFO_LOADS_SCALE: usize = 65536;
const SEC_1_MIN: usize = 60;
const SEC_5_MIN: usize = SEC_1_MIN * 5;
const SEC_15_MIN: usize = SEC_1_MIN * 15;
const UNIMPLEMENT: usize = 0;
let token = current_user_token();
let procs = procs_count();
copy_to_user(
token,
&Sysinfo {
uptime: get_time_sec(),
loads: [
procs as usize * LINUX_SYSINFO_LOADS_SCALE / SEC_1_MIN,
procs as usize * LINUX_SYSINFO_LOADS_SCALE / SEC_5_MIN,
procs as usize * LINUX_SYSINFO_LOADS_SCALE / SEC_15_MIN,
],
totalram: crate::config::MEMORY_END - crate::config::MEMORY_START,
freeram: crate::mm::unallocated_frames() * PAGE_SIZE,
sharedram: UNIMPLEMENT,
bufferram: UNIMPLEMENT,
totalswap: 0,
freeswap: 0,
procs: procs,
totalhigh: 0,
freehigh: 0,
mem_unit: 1,
},
info,
);
SUCCESS
}
pub fn sys_sbrk(increment: isize) -> isize {
sbrk(increment) as isize
}
pub fn sys_brk(brk_addr: usize) -> isize {
let new_addr: usize;
if brk_addr == 0 {
new_addr = sbrk(0);
} else {
let former_addr = sbrk(0);
let grow_size: isize = (brk_addr - former_addr) as isize;
new_addr = sbrk(grow_size);
}
info!(
"[sys_brk] brk_addr: {:X}; new_addr: {:X}",
brk_addr, new_addr
);
new_addr as isize
}
bitflags! {
struct CloneFlags: u32 {
const CLONE_VM = 0x00000100;
const CLONE_FS = 0x00000200;
const CLONE_FILES = 0x00000400;
const CLONE_SIGHAND = 0x00000800;
const CLONE_PIDFD = 0x00001000;
const CLONE_PTRACE = 0x00002000;
const CLONE_VFORK = 0x00004000;
const CLONE_PARENT = 0x00008000;
const CLONE_THREAD = 0x00010000;
const CLONE_NEWNS = 0x00020000;
const CLONE_SYSVSEM = 0x00040000;
const CLONE_SETTLS = 0x00080000;
const CLONE_PARENT_SETTID = 0x00100000;
const CLONE_CHILD_CLEARTID = 0x00200000;
const CLONE_DETACHED = 0x00400000;
const CLONE_UNTRACED = 0x00800000;
const CLONE_CHILD_SETTID = 0x01000000;
const CLONE_NEWCGROUP = 0x02000000;
const CLONE_NEWUTS = 0x04000000;
const CLONE_NEWIPC = 0x08000000;
const CLONE_NEWUSER = 0x10000000;
const CLONE_NEWPID = 0x20000000;
const CLONE_NEWNET = 0x40000000;
const CLONE_IO = 0x80000000;
}
}
pub fn sys_clone(
flags: u32,
stack: *const u8,
ptid: *const u32,
tls: *const usize,
ctid: *const u32,
) -> isize {
let current_task = current_task().unwrap();
let exit_signal = match Signals::from_signum((flags & 0xff) as usize) {
Ok(signal) => signal,
Err(_) => {
todo!()
}
};
let flags = CloneFlags::from_bits(flags & !0xff).unwrap();
info!(
"[sys_clone] flags: {:?}, exit_signal: {:?}, ptid: {:?}, tls: {:?}, ctid: {:?}",
flags, exit_signal, ptid, tls, ctid
);
show_frame_consumption! {
"fork";
let new_task = current_task.fork();
}
let new_pid = new_task.pid.0;
let trap_cx = new_task.acquire_inner_lock().get_trap_cx();
if !stack.is_null() {
trap_cx.x[2] = stack as usize;
}
trap_cx.x[10] = 0;
add_task(new_task);
new_pid as isize
}
pub fn sys_execve(
pathname: *const u8,
mut argv: *const *const u8,
mut envp: *const *const u8,
) -> isize {
let token = current_user_token();
let path = translated_str(token, pathname);
let mut argv_vec: Vec<String> = Vec::new();
let mut envp_vec: Vec<String> = Vec::new();
if !argv.is_null() {
loop {
let arg_ptr = *translated_ref(token, argv);
if arg_ptr.is_null() {
break;
}
argv_vec.push(translated_str(token, arg_ptr));
unsafe {
argv = argv.add(1);
}
}
}
if !envp.is_null() {
loop {
let env_ptr = *translated_ref(token, envp);
if env_ptr.is_null() {
break;
}
envp_vec.push(translated_str(token, env_ptr));
unsafe {
envp = envp.add(1);
}
}
}
crate::task::execve(path, argv_vec, envp_vec)
}
bitflags! {
struct WaitOption: u32 {
const WNOHANG = 1;
const WSTOPPED = 2;
const WEXITED = 4;
const WCONTINUED = 8;
const WNOWAIT = 0x1000000;
}
}
pub fn sys_wait4(pid: isize, status: *mut u32, option: u32, ru: *mut Rusage) -> isize {
let option = WaitOption::from_bits(option).unwrap();
let task = current_task().unwrap();
loop {
let mut inner = task.acquire_inner_lock();
if inner
.children
.iter()
.find(|p| pid == -1 || pid as usize == p.getpid())
.is_none()
{
return ECHILD;
}
inner
.children
.iter()
.filter(|p| pid == -1 || pid as usize == p.getpid())
.for_each(|p| {
info!(
"pid: {}, status: {:?}",
p.pid.0,
p.acquire_inner_lock().task_status
)
});
let pair = inner.children.iter().enumerate().find(|(_, p)| {
p.acquire_inner_lock().is_zombie() && (pid == -1 || pid as usize == p.getpid())
});
if let Some((idx, _)) = pair {
let child = inner.children.remove(idx);
assert_eq!(Arc::strong_count(&child), 1);
let found_pid = child.getpid();
let exit_code = child.acquire_inner_lock().exit_code;
if status as usize != 0 {
*translated_refmut(inner.memory_set.token(), status) = exit_code;
}
return found_pid as isize;
} else {
drop(inner);
if option.contains(WaitOption::WNOHANG) {
return SUCCESS;
} else {
block_current_and_run_next();
}
}
}
}
#[allow(unused)]
#[derive(Clone, Copy, Debug)]
pub struct RLimit {
rlim_cur: usize,
rlim_max: usize,
}
#[derive(Debug, Eq, PartialEq, FromPrimitive)]
#[repr(u32)]
pub enum Resource {
CPU = 0,
FSIZE = 1,
DATA = 2,
STACK = 3,
CORE = 4,
RSS = 5,
NPROC = 6,
NOFILE = 7,
MEMLOCK = 8,
AS = 9,
LOCKS = 10,
SIGPENDING = 11,
MSGQUEUE = 12,
NICE = 13,
RTPRIO = 14,
RTTIME = 15,
NLIMITS = 16,
#[num_enum(default)]
ILLEAGAL,
}
pub fn sys_prlimit(
pid: usize,
resource: u32,
new_limit: *const RLimit,
old_limit: *mut RLimit,
) -> isize {
if pid == 0 {
let task = current_task().unwrap();
let inner = task.acquire_inner_lock();
let token = inner.get_user_token();
let resource = Resource::from_primitive(resource);
info!("[sys_prlimit] pid: {}, resource: {:?}", pid, resource);
drop(inner);
if !old_limit.is_null() {
match resource {
Resource::NPROC => {
copy_to_user(
token,
&(RLimit {
rlim_cur: 32,
rlim_max: 32,
}),
old_limit,
);
}
Resource::NOFILE => {
copy_to_user(
token,
&(RLimit {
rlim_cur: 64,
rlim_max: 128,
}),
old_limit,
);
}
Resource::ILLEAGAL => return EINVAL,
_ => todo!(),
}
}
if !new_limit.is_null() {
let rlimit = &mut RLimit {
rlim_cur: 0,
rlim_max: 0,
};
copy_from_user(token, new_limit, rlimit);
warn!("[sys_prlimit] new_limit is not implemented yet, but it's not null! new_limit: {:?}", rlimit);
match resource {
Resource::NOFILE => {
}
Resource::ILLEAGAL => return EINVAL,
_ => todo!(),
}
}
} else {
todo!();
}
SUCCESS
}
pub fn sys_set_tid_address(tidptr: usize) -> isize {
current_task()
.unwrap()
.acquire_inner_lock()
.address
.clear_child_tid = tidptr;
sys_gettid()
}
pub fn sys_mmap(
start: usize,
len: usize,
prot: usize,
flags: usize,
fd: usize,
offset: usize,
) -> isize {
let prot = MapPermission::from_bits(((prot as u8) << 1) | (1 << 4)).unwrap();
let flags = MapFlags::from_bits(flags).unwrap();
info!(
"[mmap] start:{:X}; len:{:X}; prot:{:?}; flags:{:?}; fd:{}; offset:{:X}",
start, len, prot, flags, fd as isize, offset
);
mmap(start, len, prot, flags, fd, offset) as isize
}
pub fn sys_munmap(start: usize, len: usize) -> isize {
munmap(start, len) as isize
}
pub fn sys_mprotect(addr: usize, len: usize, prot: usize) -> isize {
if (addr % PAGE_SIZE != 0) || (len % PAGE_SIZE != 0) {
warn!("[sys_mprotect] not align");
return -1;
}
let prot = MapPermission::from_bits((prot << 1) as u8).unwrap();
warn!(
"[sys_mprotect] addr: {:X}, len: {:X}, prot: {:?}",
addr, len, prot
);
assert!(!prot.contains(MapPermission::W));
0
}
pub fn sys_clock_get_time(clk_id: usize, tp: *mut u64) -> isize {
if tp as usize == 0 {
return 0;
}
let token = current_user_token();
let ticks = get_time();
let sec = (ticks / CLOCK_FREQ) as u64;
let nsec = ((ticks % CLOCK_FREQ) * NSEC_PER_SEC / CLOCK_FREQ) as u64;
*translated_refmut(token, tp) = sec;
*translated_refmut(token, unsafe { tp.add(1) }) = nsec;
info!(
"sys_get_time(clk_id: {}, tp: (sec: {}, nsec: {}) = {}",
clk_id, sec, nsec, 0
);
0
}
pub fn sys_sigaction(signum: usize, act: usize, oldact: usize) -> isize {
info!(
"[sys_sigaction] signum: {:?}, act: {:X}, oldact: {:X}",
signum, act, oldact
);
sigaction(signum, act as *const SigAction, oldact as *mut SigAction)
}
pub fn sys_sigprocmask(how: u32, set: usize, oldset: usize) -> isize {
info!(
"[sys_sigprocmask] how: {:?}; set: {:X}, oldset: {:X}",
how, set, oldset
);
sigprocmask(how, set as *const Signals, oldset as *mut Signals)
}
pub fn sys_sigreturn() -> isize {
let current_task = current_task().unwrap();
info!("[sys_sigreturn] pid: {}", current_task.pid.0);
let inner = current_task.acquire_inner_lock();
let trap_cx = inner.get_trap_cx();
let sp = trap_cx.x[2];
copy_from_user(inner.get_user_token(), sp as *const TrapContext, trap_cx);
return trap_cx.x[10] as isize;
}
pub fn sys_times(buf: *mut Times) -> isize {
let task = current_task().unwrap();
let inner = task.acquire_inner_lock();
let token = inner.get_user_token();
let times = Times {
tms_utime: inner.rusage.ru_utime.to_tick(),
tms_stime: inner.rusage.ru_stime.to_tick(),
tms_cutime: 0,
tms_cstime: 0,
};
copy_to_user(token, ×, buf);
get_time() as isize
}
pub fn sys_getrusage(who: isize, usage: *mut Rusage) -> isize {
if who != 0 {
panic!("[sys_getrusage] parameter 'who' is not RUSAGE_SELF.");
}
let task = current_task().unwrap();
let inner = task.acquire_inner_lock();
let token = inner.get_user_token();
copy_to_user(token, &inner.rusage, usage);
0
}