IR: support setDebugSafety builtin function

1 files changed, 35 insertions, 7 deletions

diff --git a/test/self_hosted2.zig b/test/self_hosted2.zig
index ba1171b57b..60b12bfac8 100644
--- a/test/self_hosted2.zig
+++ b/test/self_hosted2.zig
@@ -1,13 +1,41 @@
-fn add(a: i32, b: i32) -> i32 {
-    a + b
+pub const SYS_write = 1;
+pub const SYS_exit = 60;
+pub const stdout_fileno = 1;
+const text = "hello\n";
+
+export nakedcc fn _start() -> unreachable {
+    myMain();
+}
+
+fn myMain() -> unreachable {
+    write(stdout_fileno, &text[0], text.len);
+    exit(0);
 }
 
-fn assert(ok: bool) {
-    if (!ok) @unreachable();
+pub inline fn syscall1(number: usize, arg1: usize) -> usize {
+    asm volatile ("syscall"
+        : [ret] "={rax}" (-> usize)
+        : [number] "{rax}" (number),
+            [arg1] "{rdi}" (arg1)
+        : "rcx", "r11")
 }
 
-fn testAdd() {
-    @setFnTest(this, true);
+pub inline fn syscall3(number: usize, arg1: usize, arg2: usize, arg3: usize) -> usize {
+    asm volatile ("syscall"
+        : [ret] "={rax}" (-> usize)
+        : [number] "{rax}" (number),
+            [arg1] "{rdi}" (arg1),
+            [arg2] "{rsi}" (arg2),
+            [arg3] "{rdx}" (arg3)
+        : "rcx", "r11")
+}
 
-    assert(add(2, 3) == 5);
+pub fn write(fd: i32, buf: &const u8, count: usize) -> usize {
+    syscall3(SYS_write, usize(fd), usize(buf), count)
 }
+
+pub fn exit(status: i32) -> unreachable {
+    syscall1(SYS_exit, usize(status));
+    @unreachable()
+}
+