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Updates to handling write

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This commit is contained in:
Stephen Marz 2020-06-03 21:34:28 -04:00
parent f6d842b02b
commit fd80c2bd83
1 changed files with 3 additions and 4 deletions
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7
risc_v/src/syscall.rs
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@ -175,7 +175,7 @@ pub unsafe fn do_syscall(mepc: usize, frame: *mut TrapFrame) -> usize {
}
64 => { // sys_write
let fd = (*frame).regs[gp(Registers::A0)];
let mut buf = (*frame).regs[gp(Registers::A1)] as *const u8;
let buf = (*frame).regs[gp(Registers::A1)] as *const u8;
let size = (*frame).regs[gp(Registers::A2)];
let process = get_by_pid((*frame).pid as u16);
// if (*frame).satp >> 60 != 0 {
@ -193,11 +193,11 @@ pub unsafe fn do_syscall(mepc: usize, frame: *mut TrapFrame) -> usize {
// stdout / stderr
// println!("WRITE {}, 0x{:08x}, {}", fd, bu/f as usize, size);
let mut iter = 0;
for _ in 0..size {
for i in 0..size {
iter += 1;
if (*frame).satp >> 60 != 0 {
let table = ((*process).mmu_table).as_mut().unwrap();
let paddr = virt_to_phys(table, buf as usize);
let paddr = virt_to_phys(table, buf.add(i) as usize);
if let Some(bufaddr) = paddr {
let output = *(bufaddr as *const u8) as char;
print!("{}", output);
@ -207,7 +207,6 @@ pub unsafe fn do_syscall(mepc: usize, frame: *mut TrapFrame) -> usize {
return 0;
}
}
buf = buf.add(1);
}
(*frame).regs[gp(Registers::A0)] = iter as usize;
}