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38 lines
861 B
38 lines
861 B
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Trampoline to trace irqs off. (otherwise CALLER_ADDR1 might crash) |
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* Copyright 2008 by Steven Rostedt, Red Hat, Inc |
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* (inspired by Andi Kleen's thunk_64.S) |
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*/ |
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#include <linux/linkage.h> |
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#include <asm/asm.h> |
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#include <asm/export.h> |
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/* put return address in eax (arg1) */ |
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.macro THUNK name, func, put_ret_addr_in_eax=0 |
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SYM_CODE_START_NOALIGN(\name) |
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pushl %eax |
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pushl %ecx |
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pushl %edx |
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.if \put_ret_addr_in_eax |
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/* Place EIP in the arg1 */ |
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movl 3*4(%esp), %eax |
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.endif |
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call \func |
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popl %edx |
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popl %ecx |
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popl %eax |
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ret |
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_ASM_NOKPROBE(\name) |
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SYM_CODE_END(\name) |
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.endm |
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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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