mirror of https://github.com/acidanthera/audk.git
59 lines
1.9 KiB
C
59 lines
1.9 KiB
C
/** @file
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SwitchStack() function for LoongArch.
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Copyright (c) 2022, Loongson Technology Corporation Limited. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "BaseLibInternals.h"
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UINTN
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EFIAPI
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InternalSwitchStackAsm (
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IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer
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);
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/**
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Transfers control to a function starting with a new stack.
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Transfers control to the function specified by EntryPoint using the
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new stack specified by NewStack and passing in the parameters specified
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by Context1 and Context2. Context1 and Context2 are optional and may
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be NULL. The function EntryPoint must never return.
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If EntryPoint is NULL, then ASSERT().
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If NewStack is NULL, then ASSERT().
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@param[in] EntryPoint A pointer to function to call with the new stack.
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@param[in] Context1 A pointer to the context to pass into the EntryPoint
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function.
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@param[in] Context2 A pointer to the context to pass into the EntryPoint
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function.
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@param[in] NewStack A pointer to the new stack to use for the EntryPoint
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function.
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@param[in] Marker VA_LIST marker for the variable argument list.
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**/
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VOID
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EFIAPI
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InternalSwitchStack (
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IN SWITCH_STACK_ENTRY_POINT EntryPoint,
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IN VOID *Context1 OPTIONAL,
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IN VOID *Context2 OPTIONAL,
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IN VOID *NewStack,
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IN VA_LIST Marker
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)
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{
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BASE_LIBRARY_JUMP_BUFFER JumpBuffer;
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JumpBuffer.RA = (UINTN)EntryPoint;
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JumpBuffer.SP = (UINTN)NewStack - sizeof (VOID *);
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JumpBuffer.SP -= sizeof (Context1) + sizeof (Context2);
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((VOID **)(UINTN)JumpBuffer.SP)[0] = Context1;
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((VOID **)(UINTN)JumpBuffer.SP)[1] = Context2;
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InternalSwitchStackAsm (&JumpBuffer);
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}
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