4059386c70
https://bugzilla.tianocore.org/show_bug.cgi?id=1373 Replace BSD 2-Clause License with BSD+Patent License. This change is based on the following emails: https://lists.01.org/pipermail/edk2-devel/2019-February/036260.html https://lists.01.org/pipermail/edk2-devel/2018-October/030385.html RFCs with detailed process for the license change: V3: https://lists.01.org/pipermail/edk2-devel/2019-March/038116.html V2: https://lists.01.org/pipermail/edk2-devel/2019-March/037669.html V1: https://lists.01.org/pipermail/edk2-devel/2019-March/037500.html Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
41 lines
951 B
ArmAsm
41 lines
951 B
ArmAsm
//
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// Copyright (c) 2012 - 2017, ARM Limited. All rights reserved.
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//
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// SPDX-License-Identifier: BSD-2-Clause-Patent
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//
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//
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.text
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.align 3
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GCC_ASM_EXPORT(ArmCallSvc)
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ASM_PFX(ArmCallSvc):
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// Push frame pointer and return address on the stack
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stp x29, x30, [sp, #-32]!
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mov x29, sp
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// Push x0 on the stack - The stack must always be quad-word aligned
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str x0, [sp, #16]
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// Load the SVC arguments values into the appropriate registers
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ldp x6, x7, [x0, #48]
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ldp x4, x5, [x0, #32]
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ldp x2, x3, [x0, #16]
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ldp x0, x1, [x0, #0]
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svc #0
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// Pop the ARM_SVC_ARGS structure address from the stack into x9
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ldr x9, [sp, #16]
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// Store the SVC returned values into the ARM_SVC_ARGS structure.
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// A SVC call can return up to 4 values - we do not need to store back x4-x7.
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stp x0, x1, [x9, #0]
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stp x2, x3, [x9, #16]
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mov x0, x9
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ldp x29, x30, [sp], #32
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ret
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