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44d7e4fbc0
No users left since two years due to commit 21d375b6b3 ("x86/entry/64:
Remove the SYSCALL64 fast path")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200505134059.061301403@linutronix.de
69 lines
1.5 KiB
ArmAsm
69 lines
1.5 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Save registers before calling assembly functions. This avoids
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* disturbance of register allocation in some inline assembly constructs.
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* Copyright 2001,2002 by Andi Kleen, SuSE Labs.
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* Added trace_hardirqs callers - Copyright 2007 Steven Rostedt, Red Hat, Inc.
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*/
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#include <linux/linkage.h>
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#include "calling.h"
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#include <asm/asm.h>
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#include <asm/export.h>
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/* rdi: arg1 ... normal C conventions. rax is saved/restored. */
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.macro THUNK name, func, put_ret_addr_in_rdi=0
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SYM_FUNC_START_NOALIGN(\name)
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pushq %rbp
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movq %rsp, %rbp
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pushq %rdi
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pushq %rsi
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pushq %rdx
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pushq %rcx
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pushq %rax
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pushq %r8
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pushq %r9
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pushq %r10
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pushq %r11
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.if \put_ret_addr_in_rdi
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/* 8(%rbp) is return addr on stack */
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movq 8(%rbp), %rdi
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.endif
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call \func
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jmp .L_restore
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SYM_FUNC_END(\name)
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_ASM_NOKPROBE(\name)
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.endm
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#ifdef CONFIG_TRACE_IRQFLAGS
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THUNK trace_hardirqs_on_thunk,trace_hardirqs_on_caller,1
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THUNK trace_hardirqs_off_thunk,trace_hardirqs_off_caller,1
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#endif
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#ifdef CONFIG_PREEMPTION
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THUNK preempt_schedule_thunk, preempt_schedule
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THUNK preempt_schedule_notrace_thunk, preempt_schedule_notrace
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EXPORT_SYMBOL(preempt_schedule_thunk)
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EXPORT_SYMBOL(preempt_schedule_notrace_thunk)
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#endif
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#if defined(CONFIG_TRACE_IRQFLAGS) \
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|| defined(CONFIG_PREEMPTION)
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SYM_CODE_START_LOCAL_NOALIGN(.L_restore)
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popq %r11
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popq %r10
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popq %r9
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popq %r8
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popq %rax
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popq %rcx
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popq %rdx
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popq %rsi
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popq %rdi
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popq %rbp
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ret
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_ASM_NOKPROBE(.L_restore)
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SYM_CODE_END(.L_restore)
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#endif
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