| #------------------------------------------------------------------------------ | |
| # | |
| # Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR> | |
| # This program and the accompanying materials | |
| # are licensed and made available under the terms and conditions of the BSD License | |
| # which accompanies this distribution. The full text of the license may be found at | |
| # http://opensource.org/licenses/bsd-license.php | |
| # | |
| # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
| # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
| # | |
| # Module Name: | |
| # | |
| # PageFaultHandler.S | |
| # | |
| # Abstract: | |
| # | |
| # Defines page fault handler used to hook SMM IDT | |
| # | |
| #------------------------------------------------------------------------------ | |
| ASM_GLOBAL ASM_PFX(PageFaultHandlerHook) | |
| ASM_PFX(PageFaultHandlerHook): | |
| pushq %rax # save all volatile registers | |
| pushq %rcx | |
| pushq %rdx | |
| pushq %r8 | |
| pushq %r9 | |
| pushq %r10 | |
| pushq %r11 | |
| addq $-0x68, %rsp # reserve memory to store XMM registers and make address 16-byte alignment | |
| movdqa %xmm0, 0(%rsp) | |
| movdqa %xmm1, 0x10(%rsp) | |
| movdqa %xmm2, 0x20(%rsp) | |
| movdqa %xmm3, 0x30(%rsp) | |
| movdqa %xmm4, 0x40(%rsp) | |
| movdqa %xmm5, 0x50(%rsp) | |
| addq $-0x20, %rsp | |
| call ASM_PFX(PageFaultHandler) | |
| addq $0x20, %rsp | |
| movdqa 0(%rsp), %xmm0 | |
| movdqa 0x10(%rsp), %xmm1 | |
| movdqa 0x20(%rsp), %xmm2 | |
| movdqa 0x30(%rsp), %xmm3 | |
| movdqa 0x40(%rsp), %xmm4 | |
| movdqa 0x50(%rsp), %xmm5 | |
| addq $0x68, %rsp | |
| testb %al, %al # set ZF flag | |
| popq %r11 | |
| popq %r10 | |
| popq %r9 | |
| popq %r8 | |
| popq %rdx | |
| popq %rcx | |
| popq %rax # restore all volatile registers | |
| jnz L1 # check ZF flag | |
| #ifdef __APPLE__ | |
| int $3 | |
| #else | |
| jmpq *ASM_PFX(mOriginalHandler) | |
| #endif | |
| L1: | |
| addq $0x08, %rsp # skip error code for PF | |
| iretq |