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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/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 */
pushq_cfi_reg rdi
pushq_cfi_reg rsi
pushq_cfi_reg rdx
pushq_cfi_reg rcx
pushq_cfi_reg rax
pushq_cfi_reg r8
pushq_cfi_reg r9
pushq_cfi_reg r10
pushq_cfi_reg r11
.if \put_ret_addr_in_rdi
/* 9*8(%rsp) is return addr on stack */
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
#ifdef CONFIG_PREEMPT
THUNK ___preempt_schedule, preempt_schedule
THUNK ___preempt_schedule_notrace, preempt_schedule_notrace
#endif
#if defined(CONFIG_TRACE_IRQFLAGS) \
|| defined(CONFIG_DEBUG_LOCK_ALLOC) \
|| defined(CONFIG_PREEMPT)
CFI_STARTPROC
CFI_ADJUST_CFA_OFFSET 9*8
restore:
popq_cfi_reg r11
popq_cfi_reg r10
popq_cfi_reg r9
popq_cfi_reg r8
popq_cfi_reg rax
popq_cfi_reg rcx
popq_cfi_reg rdx
popq_cfi_reg rsi
popq_cfi_reg rdi
ret
CFI_ENDPROC
_ASM_NOKPROBE(restore)
#endif
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