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2874c5fd28
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
64 lines
1.1 KiB
ArmAsm
64 lines
1.1 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Split from entry_64.S
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*/
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#include <linux/magic.h>
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#include <asm/ppc_asm.h>
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#include <asm/asm-offsets.h>
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#include <asm/ftrace.h>
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#include <asm/ppc-opcode.h>
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#include <asm/export.h>
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.pushsection ".tramp.ftrace.text","aw",@progbits;
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.globl ftrace_tramp_text
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ftrace_tramp_text:
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.space 64
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.popsection
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.pushsection ".tramp.ftrace.init","aw",@progbits;
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.globl ftrace_tramp_init
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ftrace_tramp_init:
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.space 64
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.popsection
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_GLOBAL(mcount)
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_GLOBAL(_mcount)
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EXPORT_SYMBOL(_mcount)
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mflr r12
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mtctr r12
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mtlr r0
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bctr
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#ifdef CONFIG_FUNCTION_GRAPH_TRACER
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_GLOBAL(return_to_handler)
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/* need to save return values */
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std r4, -32(r1)
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std r3, -24(r1)
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/* save TOC */
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std r2, -16(r1)
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std r31, -8(r1)
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mr r31, r1
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stdu r1, -112(r1)
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/*
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* We might be called from a module.
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* Switch to our TOC to run inside the core kernel.
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*/
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ld r2, PACATOC(r13)
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bl ftrace_return_to_handler
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nop
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/* return value has real return address */
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mtlr r3
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ld r1, 0(r1)
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ld r4, -32(r1)
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ld r3, -24(r1)
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ld r2, -16(r1)
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ld r31, -8(r1)
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/* Jump back to real return address */
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blr
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#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
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