Reorganize the codebase

services/libs/jinux-std/src/syscall/prlimit64.rs

@@ -0,0 +1,31 @@
+use crate::process::rlimit::ResourceType;
+use crate::util::{read_val_from_user, write_val_to_user};
+use crate::{log_syscall_entry, prelude::*, process::Pid};
+
+use super::SyscallReturn;
+use super::SYS_PRLIMIT64;
+
+pub fn sys_prlimit64(
+    pid: Pid,
+    resource: u32,
+    new_rlim_addr: Vaddr,
+    old_rlim_addr: Vaddr,
+) -> Result<SyscallReturn> {
+    log_syscall_entry!(SYS_PRLIMIT64);
+    let resource = ResourceType::try_from(resource)?;
+    debug!(
+        "pid = {}, resource = {:?}, new_rlim_addr = 0x{:x}, old_rlim_addr = 0x{:x}",
+        pid, resource, new_rlim_addr, old_rlim_addr
+    );
+    let current = current!();
+    let mut resource_limits = current.resource_limits().lock();
+    if old_rlim_addr != 0 {
+        let rlimit = resource_limits.get_rlimit(resource);
+        write_val_to_user(old_rlim_addr, rlimit)?;
+    }
+    if new_rlim_addr != 0 {
+        let new_rlimit = read_val_from_user(new_rlim_addr)?;
+        *resource_limits.get_rlimit_mut(resource) = new_rlimit;
+    }
+    Ok(SyscallReturn::Return(0))
+}