/* * 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> /* 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