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Implement sys_read && allocate pid and kernel stack dynamically.

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This commit is contained in:
Yifan Wu 2020-12-08 17:17:28 +08:00
parent 1bc53c0b5f
commit eddbc8954c
7 changed files with 162 additions and 19 deletions
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4
os/src/mm/page_table.rs
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@ -131,7 +131,7 @@ impl PageTable {
}
}
pub fn translated_byte_buffer(token: usize, ptr: *const u8, len: usize) -> Vec<&'static [u8]> {
pub fn translated_byte_buffer(token: usize, ptr: *const u8, len: usize) -> Vec<&'static mut [u8]> {
let page_table = PageTable::from_token(token);
let mut start = ptr as usize;
let end = start + len;
@ -146,7 +146,7 @@ pub fn translated_byte_buffer(token: usize, ptr: *const u8, len: usize) -> Vec<&
vpn.step();
let mut end_va: VirtAddr = vpn.into();
end_va = end_va.min(VirtAddr::from(end));
v.push(&ppn.get_bytes_array()[start_va.page_offset()..end_va.page_offset()]);
v.push(&mut ppn.get_bytes_array()[start_va.page_offset()..end_va.page_offset()]);
start = end_va.into();
}
v