58 lines
1.8 KiB
Rust
58 lines
1.8 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::process::*;
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pub use self::validate::*;
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use self::data::Stat;
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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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/// Process syscalls
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pub mod process;
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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 {
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SYS_EXIT => exit(b),
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SYS_READ => read(b, validate_slice_mut(c as *mut u8, d)?),
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SYS_WRITE => write(b, validate_slice(c as *const u8, d)?),
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SYS_OPEN => open(validate_slice(b as *const u8, c)?, d),
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SYS_CLOSE => close(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_LSEEK => lseek(b, c, d),
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SYS_GETPID => getpid(),
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SYS_FSTAT => fstat(b, &mut validate_slice_mut(b as *mut Stat, 1)?[0]),
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SYS_DUP => dup(b),
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SYS_BRK => brk(b),
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SYS_IOPL => iopl(b),
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SYS_FSYNC => fsync(b),
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SYS_CLONE => clone(b, stack),
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SYS_YIELD => sched_yield(),
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SYS_GETCWD => getcwd(validate_slice_mut(b as *mut u8, c)?),
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SYS_PHYSMAP => physmap(b, c, d),
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SYS_PHYSUNMAP => physunmap(b),
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_ => {
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println!("Unknown syscall {}", a);
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Err(Error::new(ENOSYS))
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}
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}
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}
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Error::mux(inner(a, b, c, d, e, f, stack))
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}
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