add: ft_read

2024-09-03 14:34:52 +02:00
parent a05124885e
commit 174a587414
2 changed files with 27 additions and 1 deletions
--- a/src/ft_read.asm
+++ b/src/ft_read.asm
@ -0,0 +1,25 @@
+extern __errno_location 
+
+section .text
+    global ft_read
+    ft_read:
+
+        xor rax, rax
+    
+        syscall
+    
+        cmp rax, 0
+        jne syscall_failed
+    
+        ret
+    
+    syscall_failed:
+        
+        neg rax
+        mov rbx, rax
+        
+        call __errno_location wrt ..plt
+
+        mov [rax], rbx
+        mov rax, -1
+        ret