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d2912cb15b
Based on 2 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 version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
39 lines
814 B
ArmAsm
39 lines
814 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org>
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*/
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#include <linux/linkage.h>
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ENTRY(__efi_rt_asm_wrapper)
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stp x29, x30, [sp, #-32]!
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mov x29, sp
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/*
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* Register x18 is designated as the 'platform' register by the AAPCS,
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* which means firmware running at the same exception level as the OS
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* (such as UEFI) should never touch it.
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*/
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stp x1, x18, [sp, #16]
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/*
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* We are lucky enough that no EFI runtime services take more than
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* 5 arguments, so all are passed in registers rather than via the
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* stack.
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*/
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mov x8, x0
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mov x0, x2
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mov x1, x3
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mov x2, x4
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mov x3, x5
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mov x4, x6
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blr x8
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ldp x1, x2, [sp, #16]
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cmp x2, x18
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ldp x29, x30, [sp], #32
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b.ne 0f
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ret
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0: b efi_handle_corrupted_x18 // tail call
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ENDPROC(__efi_rt_asm_wrapper)
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