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Allow exec, emulate clone by pretending to be child

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This commit is contained in:
Jeremy Soller 2016-09-11 18:03:10 -06:00
parent 2fffe3ee77
commit f0431f4de1
6 changed files with 33 additions and 13 deletions
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17
kernel/syscall/process.rs
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@ -63,7 +63,7 @@ pub fn brk(address: usize) -> Result<usize> {
pub fn clone(flags: usize) -> Result<usize> {
println!("Clone {:X}", flags);
Err(Error::NoCall)
Ok(0)
}
pub fn exit(status: usize) -> ! {
@ -76,22 +76,23 @@ pub fn exit(status: usize) -> ! {
pub fn exec(path: &[u8], _args: &[[usize; 2]]) -> Result<usize> {
//TODO: Use args
//TODO: Unmap previous mappings
//TODO: Drop init_data
//TODO: Drop data vec
println!("Exec {}", unsafe { str::from_utf8_unchecked(path) });
let init_file = syscall::open(path, 0)?;
let mut init_data = vec![];
let file = syscall::open(path, 0)?;
let mut data = vec![];
loop {
let mut buf = [0; 4096];
let count = syscall::read(init_file, &mut buf)?;
let count = syscall::read(file, &mut buf)?;
if count > 0 {
init_data.extend_from_slice(&buf[..count]);
data.extend_from_slice(&buf[..count]);
} else {
break;
}
}
let _ = syscall::close(init_file);
let _ = syscall::close(file);
match elf::Elf::from(&init_data) {
match elf::Elf::from(&data) {
Ok(elf) => {
elf.run();
Ok(0)