94 lines
3.5 KiB
Rust
94 lines
3.5 KiB
Rust
///! Syscall handlers
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extern crate syscall;
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pub use self::syscall::{data, error, flag, number, scheme};
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pub use self::fs::*;
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pub use self::futex::futex;
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pub use self::process::*;
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pub use self::time::*;
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pub use self::validate::*;
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use self::data::TimeSpec;
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use self::error::{Error, Result, ENOSYS};
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use self::number::*;
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/// Filesystem syscalls
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pub mod fs;
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/// Fast userspace mutex
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pub mod futex;
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/// Process syscalls
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pub mod process;
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/// Time syscalls
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pub mod time;
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/// Validate input
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pub mod validate;
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#[no_mangle]
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pub extern fn syscall(a: usize, b: usize, c: usize, d: usize, e: usize, f: usize, stack: usize) -> usize {
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#[inline(always)]
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fn inner(a: usize, b: usize, c: usize, d: usize, e: usize, f: usize, stack: usize) -> Result<usize> {
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match a & SYS_CLASS {
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SYS_CLASS_FILE => match a & SYS_ARG {
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SYS_ARG_SLICE => file_op_slice(a, b, validate_slice(c as *const u8, d)?),
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SYS_ARG_MSLICE => file_op_mut_slice(a, b, validate_slice_mut(c as *mut u8, d)?),
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_ => match a {
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SYS_CLOSE => close(b),
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SYS_DUP => dup(b, validate_slice(c as *const u8, d)?),
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SYS_FEVENT => fevent(b, c),
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SYS_FUNMAP => funmap(b),
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_ => file_op(a, b, c, d)
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}
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},
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SYS_CLASS_PATH => match a {
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SYS_OPEN => open(validate_slice(b as *const u8, c)?, d),
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SYS_MKDIR => mkdir(validate_slice(b as *const u8, c)?, d as u16),
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SYS_RMDIR => rmdir(validate_slice(b as *const u8, c)?),
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SYS_UNLINK => unlink(validate_slice(b as *const u8, c)?),
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_ => unreachable!()
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},
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_ => match a {
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SYS_EXIT => exit(b),
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SYS_WAITPID => waitpid(b, c, d),
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SYS_EXECVE => exec(validate_slice(b as *const u8, c)?, validate_slice(d as *const [usize; 2], e)?),
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SYS_CHDIR => chdir(validate_slice(b as *const u8, c)?),
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SYS_GETPID => getpid(),
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SYS_BRK => brk(b),
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SYS_IOPL => iopl(b),
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SYS_CLONE => clone(b, stack),
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SYS_YIELD => sched_yield(),
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SYS_NANOSLEEP => nanosleep(validate_slice(b as *const TimeSpec, 1).map(|req| &req[0])?, validate_slice_mut(c as *mut TimeSpec, 1).ok().map(|rem| &mut rem[0])),
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SYS_GETCWD => getcwd(validate_slice_mut(b as *mut u8, c)?),
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SYS_GETUID => getuid(),
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SYS_GETGID => getgid(),
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SYS_GETEUID => geteuid(),
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SYS_GETEGID => getegid(),
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SYS_SETUID => setuid(b as u32),
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SYS_SETGID => setgid(b as u32),
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SYS_CLOCK_GETTIME => clock_gettime(b, validate_slice_mut(c as *mut TimeSpec, 1).map(|time| &mut time[0])?),
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SYS_FUTEX => futex(validate_slice_mut(b as *mut i32, 1).map(|uaddr| &mut uaddr[0])?, c, d as i32, e, f as *mut i32),
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SYS_PIPE2 => pipe2(validate_slice_mut(b as *mut usize, 2)?, c),
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SYS_PHYSALLOC => physalloc(b),
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SYS_PHYSFREE => physfree(b, c),
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SYS_PHYSMAP => physmap(b, c, d),
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SYS_PHYSUNMAP => physunmap(b),
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SYS_VIRTTOPHYS => virttophys(b),
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_ => Err(Error::new(ENOSYS))
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}
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}
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}
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let result = inner(a, b, c, d, e, f, stack);
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/*
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if let Err(ref err) = result {
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println!("{}, {}, {}, {}: {}", a, b, c, d, err);
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}
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*/
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Error::mux(result)
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}
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