1 use crate::arch::mm::LockedFrameAllocator; 2 3 use super::{user_access::UserBufferWriter, Syscall, SystemError}; 4 5 #[repr(C)] 6 7 /// 系统信息 8 /// 9 /// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/include/uapi/linux/sysinfo.h#8 10 #[derive(Debug, Default, Copy, Clone)] 11 pub struct SysInfo { 12 uptime: u64, 13 loads: [u64; 3], 14 totalram: u64, 15 freeram: u64, 16 sharedram: u64, 17 bufferram: u64, 18 totalswap: u64, 19 freeswap: u64, 20 procs: u16, 21 pad: u16, 22 totalhigh: u64, 23 freehigh: u64, 24 mem_unit: u32, 25 // 这后面还有一小段，但是我们不需要 26 } 27 28 impl Syscall { 29 pub fn sysinfo(info: *mut SysInfo) -> Result<usize, SystemError> { 30 let mut writer = UserBufferWriter::new(info, core::mem::size_of::<SysInfo>(), true)?; 31 let mut sysinfo = SysInfo::default(); 32 33 let mem = LockedFrameAllocator.get_usage(); 34 sysinfo.uptime = 0; 35 sysinfo.loads = [0; 3]; 36 sysinfo.totalram = mem.total().bytes() as u64; 37 sysinfo.freeram = mem.free().bytes() as u64; 38 sysinfo.sharedram = 0; 39 sysinfo.bufferram = 0; 40 sysinfo.totalswap = 0; 41 sysinfo.freeswap = 0; 42 sysinfo.procs = 0; 43 sysinfo.pad = 0; 44 sysinfo.totalhigh = 0; 45 sysinfo.freehigh = 0; 46 sysinfo.mem_unit = 0; 47 48 writer.copy_one_to_user(&sysinfo, 0)?; 49 50 return Ok(0); 51 } 52 53 pub fn umask(_mask: u32) -> Result<usize, SystemError> { 54 kwarn!("SYS_UMASK has not yet been implemented\n"); 55 return Ok(0o777); 56 } 57 } 58