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Implement dup2. Add debugging lines.

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This commit is contained in:
Jeremy Soller 2016-12-27 11:18:41 -07:00
commit 364e1b542a
1 changed files with 81 additions and 6 deletions
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9
kernel/syscall/validate.rs
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@ -9,8 +9,13 @@ fn validate(address: usize, size: usize, flags: entry::EntryFlags) -> Result<()>
let start_page = Page::containing_address(VirtualAddress::new(address));
let end_page = Page::containing_address(VirtualAddress::new(address + size - 1));
for page in Page::range_inclusive(start_page, end_page) {
let page_flags = active_table.translate_page_flags(page).ok_or(Error::new(EFAULT))?;
if ! page_flags.contains(flags) {
if let Some(page_flags) = active_table.translate_page_flags(page) {
if ! page_flags.contains(flags) {
//println!("{:X}: Not {:?}", page.start_address().get(), flags);
return Err(Error::new(EFAULT));
}
} else {
//println!("{:X}: Not found", page.start_address().get());
return Err(Error::new(EFAULT));
}
}