Implement syscalls, hello world from userspace

2025-09-02 23:51:14 +02:00
parent 920de10025
commit 8a12f23b69
24 changed files with 313 additions and 44 deletions
--- a/user/hello/hello.s
+++ b/user/hello/hello.s
@ -1,6 +1,18 @@
+.section .data
+STRING:
+  .string "Hello World from userspace"
+STRING_LEN:
+  .quad . - STRING
+
+.section .text

 .global _start
 _start:
-.spin:
-  jmp .spin
+  movq $1, %rax
+  lea STRING(%rip), %rdi
+  lea STRING_LEN(%rip), %rsi
+  syscall
+
+  movq $2, %rax
+  syscall