| /* |
| * 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/asm.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 |
| _ASM_NOKPROBE(\name) |
| .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 |
| _ASM_NOKPROBE(restore) |
