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#------------------------------------------------------------------------------
#
# Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
# Portitions copyright (c) 2011, Apple Inc. All rights reserved.
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
#------------------------------------------------------------------------------
#------------------------------------------------------------------------------
# Routine Description:
#
# Routine for switching stacks with 2 parameters EFI ABI
# Convert UNIX to EFI ABI
#
# Arguments:
#
# (rdi) EntryPoint - Entry point with new stack.
# (rsi) Context1 - Parameter1 for entry point. (rcx)
# (rdx) Context2 - Parameter2 for entry point. (rdx)
# (rcx) NewStack - The pointer to new stack.
#
# Returns:
#
# None
#
#------------------------------------------------------------------------------
ASM_GLOBAL ASM_PFX(PeiSwitchStacks)
ASM_PFX(PeiSwitchStacks):
pushq $0 // tells gdb to stop unwinding frame
movq %rsp, %rbp
movq %rcx, %rsp // update stack pointer
movq %rdi, %rax // entry point to %rax
movq %rsi, %rcx // Adjust Context1
// Context2 already in the rigth spot
#
# Reserve space for register parameters (rcx, rdx, r8 & r9) on the stack,
# in case the callee wishes to spill them.
#
subq $32, %rsp // 32-byte shadow space plus alignment pad
call *%rax
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