1 ;------------------------------------------------------------------------------ 2 ; 3 ; Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR> 4 ; Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR> 5 ; This program and the accompanying materials 6 ; are licensed and made available under the terms and conditions of the BSD License 7 ; which accompanies this distribution. The full text of the license may be found at 8 ; http://opensource.org/licenses/bsd-license.php. 9 ; 10 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 11 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 12 ; 13 ;------------------------------------------------------------------------------ 14 15 EXPORT SetJump 16 EXPORT InternalLongJump 17 18 AREA BaseLib, CODE, READONLY 19 20 ;/** 21 ; Saves the current CPU context that can be restored with a call to LongJump() and returns 0.; 22 ; 23 ; Saves the current CPU context in the buffer specified by JumpBuffer and returns 0. The initial 24 ; call to SetJump() must always return 0. Subsequent calls to LongJump() cause a non-zero 25 ; value to be returned by SetJump(). 26 ; 27 ; If JumpBuffer is NULL, then ASSERT(). 28 ; For IPF CPUs, if JumpBuffer is not aligned on a 16-byte boundary, then ASSERT(). 29 ; 30 ; @param JumpBuffer A pointer to CPU context buffer. 31 ; 32 ;**/ 33 ; 34 ;UINTN 35 ;EFIAPI 36 ;SetJump ( 37 ; IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer // R0 38 ; ) 39 ; 40 SetJump 41 MOV R3, R13 42 STM R0, {R3-R12,R14} 43 EOR R0, R0 44 BX LR 45 46 ;/** 47 ; Restores the CPU context that was saved with SetJump().; 48 ; 49 ; Restores the CPU context from the buffer specified by JumpBuffer. 50 ; This function never returns to the caller. 51 ; Instead is resumes execution based on the state of JumpBuffer. 52 ; 53 ; @param JumpBuffer A pointer to CPU context buffer. 54 ; @param Value The value to return when the SetJump() context is restored. 55 ; 56 ;**/ 57 ;VOID 58 ;EFIAPI 59 ;InternalLongJump ( 60 ; IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer, // R0 61 ; IN UINTN Value // R1 62 ; ); 63 ; 64 InternalLongJump 65 LDM R0, {R3-R12,R14} 66 MOV R13, R3 67 MOV R0, R1 68 BX LR 69 70 END 71
