hello world working without libc

1 files changed, 11 insertions, 10 deletions

diff --git a/std/std.zig b/std/std.zig
index 3bcf9e4783..4e523e0015 100644
--- a/std/std.zig
+++ b/std/std.zig
@@ -1,13 +1,13 @@
 fn syscall3(number: isize, arg1: isize, arg2: isize, arg3: isize) -> isize {
     let mut result : isize;
-    asm volatile (
-        "mov %[number], %%rax\n"
-        "mov %[arg1], %%rdi\n"
-        "mov %[arg2], %%rsi\n"
-        "mov %[arg3], %%rdx\n"
-        "syscall\n"
-        "mov %%rax, %[ret]\n"
-        : [ret] "=r" (result)
+    asm volatile ("
+        mov %[number], %%rax
+        mov %[arg1], %%rdi
+        mov %[arg2], %%rsi
+        mov %[arg3], %%rdx
+        syscall
+        mov %%rax, %[ret]"
+        : [ret] "=m" (result)
         : [number] "r" (number), [arg1] "r" (arg1), [arg2] "r" (arg2), [arg3] "r" (arg3)
         : "rcx", "r11", "rax", "rdi", "rsi", "rdx");
     return result;
@@ -16,8 +16,9 @@ fn syscall3(number: isize, arg1: isize, arg2: isize, arg3: isize) -> isize {
 // TODO error handling
 // TODO zig strings instead of C strings
 // TODO handle buffering and flushing
-pub print_str(str : *const u8, len: isize) {
+// TODO non-i32 integer literals so we can remove the casts
+pub fn print_str(str : *const u8, len: isize) {
     let SYS_write = 1;
     let stdout_fileno = 1;
-    syscall3(SYS_write, stdout_fileno, str as isize, str_len);
+    syscall3(SYS_write as isize, stdout_fileno as isize, str as isize, len);
 }