1 #------------------------------------------------------------------------------ 2 #* 3 #* Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR> 4 #* This program and the accompanying materials 5 #* are licensed and made available under the terms and conditions of the BSD License 6 #* which accompanies this distribution. The full text of the license may be found at 7 #* http://opensource.org/licenses/bsd-license.php 8 #* 9 #* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 10 #* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 11 #* 12 #* CpuAsm.S 13 #* 14 #* Abstract: 15 #* 16 #------------------------------------------------------------------------------ 17 18 19 #.MMX 20 #.XMM 21 22 #------------------------------------------------------------------------------ 23 # VOID 24 # SetCodeSelector ( 25 # UINT16 Selector 26 # ); 27 #------------------------------------------------------------------------------ 28 ASM_GLOBAL ASM_PFX(SetCodeSelector) 29 ASM_PFX(SetCodeSelector): 30 movl 4(%esp), %ecx 31 subl $0x10, %esp 32 leal setCodeSelectorLongJump, %eax 33 movl %eax, (%esp) 34 movw %cx, 4(%esp) 35 .byte 0xFF, 0x2C, 0x24 # jmp *(%esp) note:(FWORD jmp) 36 setCodeSelectorLongJump: 37 addl $0x10, %esp 38 ret 39 40 #------------------------------------------------------------------------------ 41 # VOID 42 # SetDataSelectors ( 43 # UINT16 Selector 44 # ); 45 #------------------------------------------------------------------------------ 46 ASM_GLOBAL ASM_PFX(SetDataSelectors) 47 ASM_PFX(SetDataSelectors): 48 movl 4(%esp), %ecx 49 movw %cx, %ss 50 movw %cx, %ds 51 movw %cx, %es 52 movw %cx, %fs 53 movw %cx, %gs 54 ret 55 56 #END 57 58
