EmulatorPkg/Unix: Fix various typos

[mirror_edk2.git] / EmulatorPkg / Unix / Host / X64 / SwitchStack.S

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