From 185f3d38900f750a4566f87cde6a178f3595a115 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 11 Oct 2007 11:17:08 +0200 Subject: x86_64: move lib Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar --- arch/x86/lib/thunk_64.S | 67 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 arch/x86/lib/thunk_64.S (limited to 'arch/x86/lib/thunk_64.S') 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 + #include + #include + #include + + /* 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 -- cgit v1.2.3-70-g09d2