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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/x86/entry/thunk_64.S
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/x86/entry/thunk_64.S')
-rw-r--r--arch/x86/entry/thunk_64.S52
1 files changed, 52 insertions, 0 deletions
diff --git a/arch/x86/entry/thunk_64.S b/arch/x86/entry/thunk_64.S
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+++ b/arch/x86/entry/thunk_64.S
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+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * 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.
+ */
+#include <linux/linkage.h>
+#include "calling.h"
+#include <asm/asm.h>
+#include <asm/export.h>
+
+ /* rdi: arg1 ... normal C conventions. rax is saved/restored. */
+ .macro THUNK name, func
+SYM_FUNC_START_NOALIGN(\name)
+ pushq %rbp
+ movq %rsp, %rbp
+
+ pushq %rdi
+ pushq %rsi
+ pushq %rdx
+ pushq %rcx
+ pushq %rax
+ pushq %r8
+ pushq %r9
+ pushq %r10
+ pushq %r11
+
+ call \func
+ jmp __thunk_restore
+SYM_FUNC_END(\name)
+ _ASM_NOKPROBE(\name)
+ .endm
+
+ THUNK preempt_schedule_thunk, preempt_schedule
+ THUNK preempt_schedule_notrace_thunk, preempt_schedule_notrace
+ EXPORT_SYMBOL(preempt_schedule_thunk)
+ EXPORT_SYMBOL(preempt_schedule_notrace_thunk)
+
+SYM_CODE_START_LOCAL_NOALIGN(__thunk_restore)
+ popq %r11
+ popq %r10
+ popq %r9
+ popq %r8
+ popq %rax
+ popq %rcx
+ popq %rdx
+ popq %rsi
+ popq %rdi
+ popq %rbp
+ RET
+ _ASM_NOKPROBE(__thunk_restore)
+SYM_CODE_END(__thunk_restore)