1 files changed, 29 insertions, 0 deletions
diff --git a/src/thread/riscv32/syscall_cp.s b/src/thread/riscv32/syscall_cp.s
new file mode 100644
index 00000000..079d1ba0
--- /dev/null
+++ b/src/thread/riscv32/syscall_cp.s
@@ -0,0 +1,29 @@
+.global __cp_begin
+.hidden __cp_begin
+.global __cp_end
+.hidden __cp_end
+.global __cp_cancel
+.hidden __cp_cancel
+.hidden __cancel
+.global __syscall_cp_asm
+.hidden __syscall_cp_asm
+.type __syscall_cp_asm, %function
+__syscall_cp_asm:
+__cp_begin:
+	lw t0, 0(a0)
+	bnez t0, __cp_cancel
+
+	mv t0, a1
+	mv a0, a2
+	mv a1, a3
+	mv a2, a4
+	mv a3, a5
+	mv a4, a6
+	mv a5, a7
+	lw a6, 0(sp)
+	mv a7, t0
+	ecall
+__cp_end:
+	ret
+__cp_cancel:
+	tail __cancel