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