kernel/vfs: Sanity checks before performing reads/writes

2023-09-14 14:58:10 -07:00 · 2023-09-14 14:58:10 -07:00 · d41fcd8817
parent 9ae1e4710d
commit d41fcd8817
1 changed files with 10 additions and 0 deletions
--- a/kernel/vfs/vfs.asm
+++ b/kernel/vfs/vfs.asm
@ -151,6 +151,12 @@ stream_get_size:
 ; outputs:
 ; none
 read:
+    cmp r0, 0
+    ifz ret
+    cmp r1, 0
+    ifz ret
+    cmp r2, 0
+    ifz ret
    push r3
    push r1
    add r1, 7
@ -212,6 +218,10 @@ stream_read_char:
 ; outputs:
 ; none
 write:
+    cmp r0, 0
+    ifz ret
+    cmp r1, 0
+    ifz ret
    push r3
    push r1
    add r1, 7