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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>
32 lines
904 B
ArmAsm
32 lines
904 B
ArmAsm
#------------------------------------------------------------------------------
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#
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# Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
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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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#include <AsmMacroIoLib.h>
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/*
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Semihosting operation request mechanism
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SVC 0x123456 in ARM state (for all architectures)
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SVC 0xAB in Thumb state (excluding ARMv7-M)
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BKPT 0xAB for ARMv7-M (Thumb-2 only)
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R0 - operation type
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R1 - block containing all other parametes
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lr - must be saved as svc instruction will cause an svc exception and write
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the svc lr register. That happens to be the one we are using, so we must
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save it or we will not be able to return.
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*/
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ASM_FUNC(GccSemihostCall)
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stmfd sp!, {lr}
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svc #0x123456
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ldmfd sp!, {lr}
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bx lr
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