Architectural Support: x86_64 (#37)

[lunaix-os.git] / lunaix-os / usr / libc / arch / x86_64 / syscall.S

diff --git a/lunaix-os/usr/libc/arch/x86_64/syscall.S b/lunaix-os/usr/libc/arch/x86_64/syscall.S
new file mode 100644 (file)
index 0000000..def99e5
--- /dev/null
+++ b/lunaix-os/usr/libc/arch/x86_64/syscall.S
@@ -0,0 +1,43 @@
+#include <lunaix/syscallid.h>
+
+#define LUNAIX_SYSCALL 33
+#define regsize 8
+
+    .struct  2 * regsize # rip, rbp
+id:
+    .struct id + regsize
+a1:
+    .struct a1 + regsize
+a2:
+    .struct a2 + regsize
+a3:
+    .struct a3 + regsize
+a4:
+    .struct a4 + regsize
+a5:
+
+.section .text
+    .type do_lunaix_syscall, @function    
+    .global do_lunaix_syscall
+
+    do_lunaix_syscall:
+        pushq %rbp
+        movq %rsp, %rbp
+
+        pushq %rbx
+
+        movq %rcx, %r10
+       
+        movq %rdi, %rax
+        movq %rsi, %rbx
+        movq %rdx, %rcx
+        movq %r10, %rdx
+        movq %r8, %rdi
+        movq %r9, %rsi
+        
+        int $LUNAIX_SYSCALL
+
+        popq %rbx
+
+        leave
+        ret
\ No newline at end of file