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- /*
- * 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.
- * Added trace_hardirqs callers - Copyright 2007 Steven Rostedt, Red Hat, Inc.
- * 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, put_ret_addr_in_rdi=0
- .globl \name
- \name:
- CFI_STARTPROC
- /* this one pushes 9 elems, the next one would be %rIP */
- SAVE_ARGS
- .if \put_ret_addr_in_rdi
- movq_cfi_restore 9*8, rdi
- .endif
- call \func
- jmp restore
- CFI_ENDPROC
- .endm
- #ifdef CONFIG_TRACE_IRQFLAGS
- THUNK trace_hardirqs_on_thunk,trace_hardirqs_on_caller,1
- THUNK trace_hardirqs_off_thunk,trace_hardirqs_off_caller,1
- #endif
- #ifdef CONFIG_DEBUG_LOCK_ALLOC
- THUNK lockdep_sys_exit_thunk,lockdep_sys_exit
- #endif
- /* SAVE_ARGS below is used only for the .cfi directives it contains. */
- CFI_STARTPROC
- SAVE_ARGS
- restore:
- RESTORE_ARGS
- ret
- CFI_ENDPROC
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