aboutsummaryrefslogtreecommitdiff
path: root/arch/um/sys-x86_64/stub.S
diff options
context:
space:
mode:
Diffstat (limited to 'arch/um/sys-x86_64/stub.S')
-rw-r--r--arch/um/sys-x86_64/stub.S15
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/um/sys-x86_64/stub.S b/arch/um/sys-x86_64/stub.S
new file mode 100644
index 00000000000..31c14925716
--- /dev/null
+++ b/arch/um/sys-x86_64/stub.S
@@ -0,0 +1,15 @@
+#include "uml-config.h"
+
+ .globl syscall_stub
+.section .__syscall_stub, "x"
+syscall_stub:
+ syscall
+ /* We don't have 64-bit constants, so this constructs the address
+ * we need.
+ */
+ movq $(UML_CONFIG_STUB_DATA >> 32), %rbx
+ salq $32, %rbx
+ movq $(UML_CONFIG_STUB_DATA & 0xffffffff), %rcx
+ or %rcx, %rbx
+ movq %rax, (%rbx)
+ int3