feat! ddk -> libDDK, use syscall on AMD64.

Signed-off-by: Amlal El Mahrouss <amlal@nekernel.org>

1 files changed, 42 insertions, 0 deletions

diff --git a/dev/libDDK/src/ddk_kernel_call_dispatch.S b/dev/libDDK/src/ddk_kernel_call_dispatch.S
new file mode 100644
index 00000000..dfe2d929
--- /dev/null
+++ b/dev/libDDK/src/ddk_kernel_call_dispatch.S
@@ -0,0 +1,42 @@
+/**
+ lang: asm
+ compiler: gnu
+ */
+
+.globl __ke_call_dispatch
+
+.text
+
+/* Really simple function, takes our va-list,
+    and brings it to the trap handler in the Kernel. */
+
+#if defined(__DDK_AMD64__)
+
+/* args rcx, rdx, r8, r9 */
+__ke_call_dispatch:
+    pushq rbp
+    movq rbp, rsp
+
+    syscall
+
+    popq rbp
+
+    ret
+
+#elif defined(__DDK_POWER64__)
+
+/* args r8, r9, r10, r11 */
+ke_call_dispatch:
+    /* There is no specific interrupt request id for a system call in POWER. */
+    sc
+    blr
+
+#elif defined(__DDK_ARM64__)
+
+/* args x0, x8, x9, x10, x11 is kept to tell that this is a Kernel call */
+ke_call_dispatch:
+    /* There is no specific interrupt request id for a system call in ARM64 as well. */
+    mov x9, #0x33
+    svc #0
+
+#endif