InternalSwitchStack.c File Reference

#include "BaseLibInternals.h"

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Functions
VOID EFIAPI	InternalSwitchStackAsm (IN VOID *Context1 OPTIONAL, IN VOID *Context2 OPTIONAL, IN SWITCH_STACK_ENTRY_POINT EntryPoint, IN VOID *NewStack)
VOID EFIAPI	InternalSwitchStack (IN SWITCH_STACK_ENTRY_POINT EntryPoint, IN VOID *Context1 OPTIONAL, IN VOID *Context2 OPTIONAL, IN VOID *NewStack, IN VA_LIST Marker)

Detailed Description

Switch stack function for RISC-V

Copyright (c) 2020, Hewlett Packard Enterprise Development LP. All rights reserved.

SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file InternalSwitchStack.c.

Function Documentation

InternalSwitchStack()

VOID EFIAPI InternalSwitchStack	(	IN SWITCH_STACK_ENTRY_POINT	EntryPoint,
		IN VOID *Context1	OPTIONAL,
		IN VOID *Context2	OPTIONAL,
		IN VOID *	NewStack,
		IN VA_LIST	Marker
	)

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. Marker will be ignored on IA-32, x64, and EBC. IPF CPUs expect one additional parameter of type VOID * that specifies the new backing store pointer.

If EntryPoint is NULL, then ASSERT(). If NewStack is NULL, then ASSERT().

Parameters

EntryPoint	A pointer to function to call with the new stack.
Context1	A pointer to the context to pass into the EntryPoint function.
Context2	A pointer to the context to pass into the EntryPoint function.
NewStack	A pointer to the new stack to use for the EntryPoint function.
Marker	VA_LIST marker for the variable argument list.

Definition at line 61 of file InternalSwitchStack.c.

InternalSwitchStackAsm()

VOID EFIAPI InternalSwitchStackAsm	(	IN VOID *Context1	OPTIONAL,
		IN VOID *Context2	OPTIONAL,
		IN SWITCH_STACK_ENTRY_POINT	EntryPoint,
		IN VOID *	NewStack
	)

Transfers control to a function starting with a new stack.

This internal worker function transfers control to the function specified by EntryPoint using the new stack specified by NewStack, and passes in the parameters specified by Context1 and Context2. Context1 and Context2 are optional and may be NULL. The function EntryPoint must never return.

Parameters

Context1	The first parameter to pass in.
Context2	The second Parameter to pass in
EntryPoint	The pointer to the function to enter.
NewStack	The new Location of the stack