x86_64: move lib

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 67 insertions, 0 deletions

diff --git a/arch/x86/lib/thunk_64.S b/arch/x86/lib/thunk_64.S
new file mode 100644
index 000000000000..55e586d352d3
--- /dev/null
+++ b/arch/x86/lib/thunk_64.S
@@ -0,0 +1,67 @@
+/*
+ * Save registers before calling assembly functions. This avoids
+ * disturbance of register allocation in some inline assembly constructs.
+ * Copyright 2001,2002 by Andi Kleen, SuSE Labs.
+ * Subject to the GNU public license, v.2. No warranty of any kind.
+ */
+
+        #include <linux/linkage.h>
+        #include <asm/dwarf2.h>
+        #include <asm/calling.h>                        
+        #include <asm/rwlock.h>
+                
+        /* rdi: arg1 ... normal C conventions. rax is saved/restored. */        
+        .macro thunk name,func
+        .globl \name
+\name:  
+        CFI_STARTPROC
+        SAVE_ARGS
+        call \func
+        jmp  restore
+        CFI_ENDPROC
+        .endm
+
+        /* rdi: arg1 ... normal C conventions. rax is passed from C. */         
+        .macro thunk_retrax name,func
+        .globl \name
+\name:  
+        CFI_STARTPROC
+        SAVE_ARGS
+        call \func
+        jmp  restore_norax
+        CFI_ENDPROC
+        .endm
+        
+
+        .section .sched.text
+#ifdef CONFIG_RWSEM_XCHGADD_ALGORITHM
+        thunk rwsem_down_read_failed_thunk,rwsem_down_read_failed
+        thunk rwsem_down_write_failed_thunk,rwsem_down_write_failed
+        thunk rwsem_wake_thunk,rwsem_wake
+        thunk rwsem_downgrade_thunk,rwsem_downgrade_wake
+#endif  
+        
+        thunk __down_failed,__down
+        thunk_retrax __down_failed_interruptible,__down_interruptible
+        thunk_retrax __down_failed_trylock,__down_trylock
+        thunk __up_wakeup,__up
+
+#ifdef CONFIG_TRACE_IRQFLAGS
+        thunk trace_hardirqs_on_thunk,trace_hardirqs_on
+        thunk trace_hardirqs_off_thunk,trace_hardirqs_off
+#endif
+        
+        /* SAVE_ARGS below is used only for the .cfi directives it contains. */
+        CFI_STARTPROC
+        SAVE_ARGS
+restore:
+        RESTORE_ARGS
+        ret     
+        CFI_ENDPROC
+        
+        CFI_STARTPROC
+        SAVE_ARGS
+restore_norax:  
+        RESTORE_ARGS 1
+        ret
+        CFI_ENDPROC