Noratrieb/asm-coreutils
1
0
Fork 0
mirror of https://github.com/Noratrieb/asm-coreutils.git synced 2026-01-15 02:05:03 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

cat works

Browse source
This commit is contained in:
nora 2022-01-02 16:48:33 +01:00
parent 7a02913e36
commit 5e9b9783de
1 changed files with 5 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

10
src/cat.asm
View file

@ -1,4 +1,5 @@
extern open_file_arg extern open_file_arg
extern println_num
global _start global _start
@ -29,23 +30,22 @@ _start:
cmp rax, 0 cmp rax, 0
jl file_not_found jl file_not_found
mov rdi, rax mov r12, rax
jmp init jmp init
stdin_init: stdin_init:
mov rdi, STDIN_FD mov r12, STDIN_FD
init: init:
; the input fd is in rdi at this point ; the input fd is in r12 at this point
xor r13, r13
process: process:
; read in from the file ; read in from the file
mov rdi, r12
mov rax, 0 mov rax, 0
mov rsi, io_buf mov rsi, io_buf
mov rdx, IO_BUF_SIZE mov rdx, IO_BUF_SIZE
syscall syscall
; test whether it is finished
cmp rax, 0 cmp rax, 0
jz finish jz finish