blob: 9a7ddee7d6e930605d6ffe6917ee3c96c8943182 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
## read a character from stdin, save it to a global, write it to stdout
# variables are always references
# read their address with their names: x (can't write to their address)
# read/write their contents with a lookup: *x
var x : char
fn main [
call read 0/stdin, x, 1/size
result/EAX <- call write 1/stdout, x, 1/size
call exit, result/EAX
]
fn read fd : int, x : (address array byte), size : int [
EBX <- copy fd
ECX <- copy x
EDX <- copy size
EAX <- copy 3/read
syscall
]
fn write fd : int, x : (address array byte), size : int [
EBX <- copy fd
ECX <- copy x
EDX <- copy size
EAX <- copy 4/write
syscall
]
fn exit x : int [
code/EBX <- copy x
code/EAX <- copy 1/exit
syscall
]
|