fix typo in x86_64 cancellable syscall asm

diff --git a/src/thread/x86_64/syscall_cp.s b/src/thread/x86_64/syscall_cp.s
index 8b25048..9727ad3 100644 (file)
--- a/src/thread/x86_64/syscall_cp.s
+++ b/src/thread/x86_64/syscall_cp.s
@@ -19,7 +19,7 @@ __syscall_cp_asm:
        mov %r11,8(%rsp)
 1:     syscall
        xor %ecx,%ecx
-       mov 8(%rsp),%edi
+       mov 8(%rsp),%rdi
        mov %rcx,(%rdi)
        ret
 2:     call __cancel