From 0c30603ec082cfcfaa648faaf53e35c4857fd646 Mon Sep 17 00:00:00 2001
From: Jeremy Soller <jeremy@system76.com>
Date: Mon, 26 Nov 2018 11:38:53 -0700
Subject: [PATCH] Add aarch64

---
 src/arch/aarch64.rs | 77 +++++++++++++++++++++++++++++++++++++++++++++
 src/lib.rs          |  4 +++
 2 files changed, 81 insertions(+)
 create mode 100644 src/arch/aarch64.rs

diff --git a/src/arch/aarch64.rs b/src/arch/aarch64.rs
new file mode 100644
index 0000000000..662f428d04
--- /dev/null
+++ b/src/arch/aarch64.rs
@@ -0,0 +1,77 @@
+use super::error::{Error, Result};
+
+pub unsafe fn syscall0(mut a: usize) -> Result<usize> {
+    asm!("svc   0"
+          : "={x0}"(a)
+          : "{x8}"(a)
+          : "x0", "x8"
+          : "volatile");
+
+    Error::demux(a)
+}
+
+pub unsafe fn syscall1(mut a: usize, b: usize) -> Result<usize> {
+    asm!("svc   0"
+          : "={x0}"(a)
+          : "{x8}"(a), "{x0}"(b)
+          : "x0", "x8"
+          : "volatile");
+
+    Error::demux(a)
+}
+
+// Clobbers all registers - special for clone
+pub unsafe fn syscall1_clobber(mut a: usize, b: usize) -> Result<usize> {
+    asm!("svc   0"
+          : "={x0}"(a)
+          : "{x8}"(a), "{x0}"(b)
+          : "memory",
+            "x0", "x1",  "x2",  "x3",  "x4",  "x5", "x6", "x7",
+            "x8",  "x9", "x10", "x11", "x12", "x13", "x14", "x15",
+            "x16", "x17","x18", "x19", "x20", "x21", "x22", "x23",
+            "x24", "x25", "x26", "x27", "x28", "x29", "x30"
+          : "volatile");
+
+    Error::demux(a)
+}
+
+pub unsafe fn syscall2(mut a: usize, b: usize, c: usize) -> Result<usize> {
+    asm!("svc   0"
+          : "={x0}"(a)
+          : "{x8}"(a), "{x0}"(b), "{x1}"(c)
+          : "x0", "x1", "x8"
+          : "volatile");
+
+    Error::demux(a)
+}
+
+pub unsafe fn syscall3(mut a: usize, b: usize, c: usize, d: usize) -> Result<usize> {
+    asm!("svc   0"
+          : "={x0}"(a)
+          : "{x8}"(a), "{x0}"(b), "{x1}"(c), "{x2}"(d)
+          : "x0", "x1", "x2", "x8"
+          : "volatile");
+
+    Error::demux(a)
+}
+
+pub unsafe fn syscall4(mut a: usize, b: usize, c: usize, d: usize, e: usize) -> Result<usize> {
+    asm!("svc   0"
+          : "={x0}"(a)
+          : "{x8}"(a), "{x0}"(b), "{x1}"(c), "{x2}"(d), "{x3}"(e)
+          : "x0", "x1", "x2", "x3", "x8"
+          : "volatile");
+
+    Error::demux(a)
+}
+
+pub unsafe fn syscall5(mut a: usize, b: usize, c: usize, d: usize, e: usize, f: usize)
+    -> Result<usize> {
+    asm!("svc   0"
+          : "={x0}"(a)
+          : "{x8}"(a), "{x0}"(b), "{x1}"(c), "{x2}"(d), "{x3}"(e), "{x4}"(f)
+          : "x0", "x1", "x2", "x3", "x4", "x8"
+          : "volatile");
+
+    Error::demux(a)
+}
diff --git a/src/lib.rs b/src/lib.rs
index bfeeff0196..50c2a9729f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -17,6 +17,10 @@ pub use self::scheme::*;
 #[path="arch/arm.rs"]
 mod arch;
 
+#[cfg(target_arch = "aarch64")]
+#[path="arch/aarch64.rs"]
+mod arch;
+
 #[cfg(target_arch = "x86")]
 #[path="arch/x86.rs"]
 mod arch;