Use ASM_PFX to optionnaly set the underscore prefix

[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / DisablePaging32.S

#------------------------------------------------------------------------------\r
#\r
# Copyright (c) 2006, Intel Corporation\r
# All rights reserved. This program and the accompanying materials\r
# are licensed and made available under the terms and conditions of the BSD License\r
# which accompanies this distribution.  The full text of the license may be found at\r
# http://opensource.org/licenses/bsd-license.php\r
#\r
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
#\r
# Module Name:\r
#\r
#   DisablePaging32.Asm\r
#\r
# Abstract:\r
#\r
#   InternalX86DisablePaging32 function\r
#\r
# Notes:\r
#\r
#------------------------------------------------------------------------------\r
\r
.globl ASM_PFX(InternalX86DisablePaging32)\r
\r
#------------------------------------------------------------------------------\r
# VOID\r
# EFIAPI\r
# InternalX86DisablePaging32 (\r
#   IN      SWITCH_STACK_ENTRY_POINT  EntryPoint,\r
#   IN      VOID                      *Context1,    OPTIONAL\r
#   IN      VOID                      *Context2,    OPTIONAL\r
#   IN      VOID                      *NewStack\r
#   );\r
#------------------------------------------------------------------------------\r
ASM_PFX(InternalX86DisablePaging32):\r
    movl    4(%esp), %ebx\r
    movl    8(%esp), %ecx\r
    movl    12(%esp), %edx\r
    pushfl\r
    pop     %edi\r
    cli\r
    movl    %cr0, %eax\r
    btrl    $31, %eax\r
    movl    16(%esp), %esp\r
    movl    %eax, %cr0\r
    push    %edi\r
    popfl\r
    push    %edx\r
    push    %ecx\r
    call    *%ebx\r
    jmp     .\r