| #------------------------------------------------------------------------------ | |
| # | |
| # Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR> | |
| # Portions 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 | |