1 files changed, 13 insertions, 0 deletions
diff --git a/target/riscv/cpu_user.h b/target/riscv/cpu_user.h
new file mode 100644
index 0000000000..c2199610ab
--- /dev/null
+++ b/target/riscv/cpu_user.h
@@ -0,0 +1,13 @@
+#define xRA 1   /* return address (aka link register) */
+#define xSP 2   /* stack pointer */
+#define xGP 3   /* global pointer */
+#define xTP 4   /* thread pointer */
+
+#define xA0 10  /* gpr[10-17] are syscall arguments */
+#define xA1 11
+#define xA2 12
+#define xA3 13
+#define xA4 14
+#define xA5 15
+#define xA6 16
+#define xA7 17  /* syscall number goes here */