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Support cmdline_args when sys_exec.

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This commit is contained in:
Yifan Wu 2021-02-26 12:06:55 +08:00
parent c43ec12175
commit c8d851fc2b
16 changed files with 132 additions and 24 deletions
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11
os/src/mm/page_table.rs
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@ -174,6 +174,7 @@ pub fn translated_byte_buffer(token: usize, ptr: *const u8, len: usize) -> Vec<&
v
}
/// Load a string from other address spaces into kernel space without an end `\0`.
pub fn translated_str(token: usize, ptr: *const u8) -> String {
let page_table = PageTable::from_token(token);
let mut string = String::new();
@ -182,14 +183,18 @@ pub fn translated_str(token: usize, ptr: *const u8) -> String {
let ch: u8 = *(page_table.translate_va(VirtAddr::from(va)).unwrap().get_mut());
if ch == 0 {
break;
} else {
string.push(ch as char);
va += 1;
}
string.push(ch as char);
va += 1;
}
string
}
pub fn translated_ref<T>(token: usize, ptr: *const T) -> &'static T {
let page_table = PageTable::from_token(token);
page_table.translate_va(VirtAddr::from(ptr as usize)).unwrap().get_ref()
}
pub fn translated_refmut<T>(token: usize, ptr: *mut T) -> &'static mut T {
let page_table = PageTable::from_token(token);
let va = ptr as usize;