+++ /dev/null
-;------------------------------------------------------------------------------\r
-;\r
-; Copyright (c) 2010 - 2015, Intel Corporation. All rights reserved.<BR>\r
-; 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
-; AsmFuncs.asm\r
-;\r
-; Abstract:\r
-;\r
-; Debug interrupt handle functions.\r
-;\r
-;------------------------------------------------------------------------------\r
-\r
-#include "DebugException.h"\r
-\r
-.686p\r
-.xmm\r
-.model flat,c\r
-\r
-;\r
-; InterruptProcess()\r
-;\r
-InterruptProcess PROTO C\r
-\r
-public Exception0Handle, TimerInterruptHandle, ExceptionStubHeaderSize\r
-\r
-AGENT_HANDLER_SIGNATURE MACRO\r
- db 41h, 47h, 54h, 48h ; SIGNATURE_32('A','G','T','H')\r
-ENDM\r
-\r
-.data\r
-\r
-ExceptionStubHeaderSize DD Exception1Handle - Exception0Handle\r
-CommonEntryAddr DD CommonEntry\r
-\r
-.code\r
-\r
-AGENT_HANDLER_SIGNATURE\r
-Exception0Handle:\r
- cli\r
- push eax\r
- mov eax, 0\r
- jmp dword ptr [CommonEntryAddr]\r
-AGENT_HANDLER_SIGNATURE\r
-Exception1Handle:\r
- cli\r
- push eax\r
- mov eax, 1\r
- jmp dword ptr [CommonEntryAddr]\r
-AGENT_HANDLER_SIGNATURE\r
-Exception2Handle:\r
- cli\r
- push eax\r
- mov eax, 2\r
- jmp dword ptr [CommonEntryAddr]\r
-AGENT_HANDLER_SIGNATURE\r
-Exception3Handle:\r
- cli\r
- push eax\r
- mov eax, 3\r
- jmp dword ptr [CommonEntryAddr]\r
-AGENT_HANDLER_SIGNATURE\r
-Exception4Handle:\r
- cli\r
- push eax\r
- mov eax, 4\r
- jmp dword ptr [CommonEntryAddr]\r
-AGENT_HANDLER_SIGNATURE\r
-Exception5Handle:\r
- cli\r
- push eax\r
- mov eax, 5\r
- jmp dword ptr [CommonEntryAddr]\r
-AGENT_HANDLER_SIGNATURE\r
-Exception6Handle:\r
- cli\r
- push eax\r
- mov eax, 6\r
- jmp dword ptr [CommonEntryAddr]\r
-AGENT_HANDLER_SIGNATURE\r
-Exception7Handle:\r
- cli\r
- push eax\r
- mov eax, 7\r
- jmp dword ptr [CommonEntryAddr]\r
-AGENT_HANDLER_SIGNATURE\r
-Exception8Handle:\r
- cli\r
- push eax\r
- mov eax, 8\r
- jmp dword ptr [CommonEntryAddr]\r
-AGENT_HANDLER_SIGNATURE\r
-Exception9Handle:\r
- cli\r
- push eax\r
- mov eax, 9\r
- jmp dword ptr [CommonEntryAddr]\r
-AGENT_HANDLER_SIGNATURE\r
-Exception10Handle:\r
- cli\r
- push eax\r
- mov eax, 10\r
- jmp dword ptr [CommonEntryAddr]\r
-AGENT_HANDLER_SIGNATURE\r
-Exception11Handle:\r
- cli\r
- push eax\r
- mov eax, 11\r
- jmp dword ptr [CommonEntryAddr]\r
-AGENT_HANDLER_SIGNATURE\r
-Exception12Handle:\r
- cli\r
- push eax\r
- mov eax, 12\r
- jmp dword ptr [CommonEntryAddr]\r
-AGENT_HANDLER_SIGNATURE\r
-Exception13Handle:\r
- cli\r
- push eax\r
- mov eax, 13\r
- jmp dword ptr [CommonEntryAddr]\r
-AGENT_HANDLER_SIGNATURE\r
-Exception14Handle:\r
- cli\r
- push eax\r
- mov eax, 14\r
- jmp dword ptr [CommonEntryAddr]\r
-AGENT_HANDLER_SIGNATURE\r
-Exception15Handle:\r
- cli\r
- push eax\r
- mov eax, 15\r
- jmp dword ptr [CommonEntryAddr]\r
-AGENT_HANDLER_SIGNATURE\r
-Exception16Handle:\r
- cli\r
- push eax\r
- mov eax, 16\r
- jmp dword ptr [CommonEntryAddr]\r
-AGENT_HANDLER_SIGNATURE\r
-Exception17Handle:\r
- cli\r
- push eax\r
- mov eax, 17\r
- jmp dword ptr [CommonEntryAddr]\r
-AGENT_HANDLER_SIGNATURE\r
-Exception18Handle:\r
- cli\r
- push eax\r
- mov eax, 18\r
- jmp dword ptr [CommonEntryAddr]\r
-AGENT_HANDLER_SIGNATURE\r
-Exception19Handle:\r
- cli\r
- push eax\r
- mov eax, 19\r
- jmp dword ptr [CommonEntryAddr]\r
-AGENT_HANDLER_SIGNATURE\r
-TimerInterruptHandle:\r
- cli\r
- push eax\r
- mov eax, 32\r
- jmp dword ptr [CommonEntryAddr]\r
-\r
-CommonEntry:\r
-;\r
-; +---------------------+\r
-; + EFlags +\r
-; +---------------------+\r
-; + CS +\r
-; +---------------------+\r
-; + EIP +\r
-; +---------------------+\r
-; + Error Code +\r
-; +---------------------+\r
-; + EAX / Vector Number +\r
-; +---------------------+\r
-; + EBP +\r
-; +---------------------+ <-- EBP\r
-;\r
- cmp eax, DEBUG_EXCEPT_DOUBLE_FAULT\r
- je NoExtrPush\r
- cmp eax, DEBUG_EXCEPT_INVALID_TSS\r
- je NoExtrPush\r
- cmp eax, DEBUG_EXCEPT_SEG_NOT_PRESENT\r
- je NoExtrPush\r
- cmp eax, DEBUG_EXCEPT_STACK_FAULT\r
- je NoExtrPush\r
- cmp eax, DEBUG_EXCEPT_GP_FAULT\r
- je NoExtrPush\r
- cmp eax, DEBUG_EXCEPT_PAGE_FAULT\r
- je NoExtrPush\r
- cmp eax, DEBUG_EXCEPT_ALIGNMENT_CHECK\r
- je NoExtrPush\r
-\r
- push [esp]\r
- mov dword ptr [esp + 4], 0\r
-\r
-NoExtrPush:\r
-\r
- push ebp\r
- mov ebp, esp ; save esp in ebp\r
- ;\r
- ; Make stack 16-byte alignment to make sure save fxrstor later\r
- ;\r
- and esp, 0fffffff0h\r
- sub esp, 12\r
-\r
- ; store UINT32 Edi, Esi, Ebp, Ebx, Edx, Ecx, Eax;\r
- push dword ptr [ebp + 4] ; original eax\r
- push ebx\r
- push ecx\r
- push edx\r
- mov ebx, eax ; save vector in ebx\r
- mov eax, ebp\r
- add eax, 4 * 6\r
- push eax ; original ESP\r
- push dword ptr [ebp] ; EBP\r
- push esi\r
- push edi\r
-\r
- ;; UINT32 Cr0, Cr1, Cr2, Cr3, Cr4;\r
- ;; insure FXSAVE/FXRSTOR is enabled in CR4...\r
- ;; ... while we're at it, make sure DE is also enabled...\r
- mov eax, 1\r
- push ebx ; temporarily save value of ebx on stack \r
- cpuid ; use CPUID to determine if FXSAVE/FXRESTOR and\r
- ; DE are supported\r
- pop ebx ; retore value of ebx that was overwritten by CPUID \r
- mov eax, cr4\r
- push eax ; push cr4 firstly\r
- test edx, BIT24 ; Test for FXSAVE/FXRESTOR support\r
- jz @F\r
- or eax, BIT9 ; Set CR4.OSFXSR\r
-@@: \r
- test edx, BIT2 ; Test for Debugging Extensions support\r
- jz @F\r
- or eax, BIT3 ; Set CR4.DE\r
-@@: \r
- mov cr4, eax\r
- mov eax, cr3\r
- push eax\r
- mov eax, cr2\r
- push eax\r
- push 0 ; cr0 will not saved???\r
- mov eax, cr0\r
- push eax\r
-\r
- xor ecx, ecx\r
- mov ecx, Ss\r
- push ecx\r
- mov ecx, Cs\r
- push ecx\r
- mov ecx, Ds\r
- push ecx\r
- mov ecx, Es\r
- push ecx\r
- mov ecx, Fs\r
- push ecx\r
- mov ecx, Gs\r
- push ecx\r
-\r
- ;; EIP\r
- mov ecx, [ebp + 4 * 3] ; EIP\r
- push ecx\r
-\r
- ;; UINT32 Gdtr[2], Idtr[2];\r
- sub esp, 8\r
- sidt fword ptr [esp]\r
- sub esp, 8\r
- sgdt fword ptr [esp]\r
-\r
- ;; UINT32 Ldtr, Tr;\r
- xor eax, eax\r
- str ax\r
- push eax\r
- sldt ax\r
- push eax\r
-\r
- ;; EFlags\r
- mov ecx, [ebp + 4 * 5]\r
- push ecx\r
-\r
- ;; UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;\r
- mov eax, dr7\r
- push eax\r
-\r
- ;; clear Dr7 while executing debugger itself\r
- xor eax, eax\r
- mov dr7, eax\r
-\r
- ;; Dr6\r
- mov eax, dr6\r
- push eax\r
-\r
- ;; insure all status bits in dr6 are clear...\r
- xor eax, eax\r
- mov dr6, eax\r
-\r
- mov eax, dr3\r
- push eax\r
- mov eax, dr2\r
- push eax\r
- mov eax, dr1\r
- push eax\r
- mov eax, dr0\r
- push eax\r
-\r
- ;; Clear Direction Flag\r
- cld\r
-\r
- ;; FX_SAVE_STATE_IA32 FxSaveState;\r
- sub esp, 512\r
- mov edi, esp\r
- ;; Clear the buffer\r
- xor eax, eax\r
- mov ecx, 128 ;= 512 / 4\r
- rep stosd\r
- mov edi, esp\r
-\r
- test edx, BIT24 ; Test for FXSAVE/FXRESTOR support.\r
- ; edx still contains result from CPUID above\r
- jz @F\r
- db 0fh, 0aeh, 00000111y ;fxsave [edi]\r
-@@: \r
-\r
- ;; save the exception data\r
- push dword ptr [ebp + 8]\r
-\r
- ; call the C interrupt process function\r
- push esp ; Structure\r
- push ebx ; vector\r
- call InterruptProcess\r
- add esp, 8\r
-\r
- ; skip the exception data\r
- add esp, 4\r
-\r
- ;; FX_SAVE_STATE_IA32 FxSaveState;\r
- mov esi, esp\r
- mov eax, 1\r
- cpuid ; use CPUID to determine if FXSAVE/FXRESTOR are supported\r
- test edx, BIT24 ; Test for FXSAVE/FXRESTOR support\r
- jz @F\r
- db 0fh, 0aeh, 00001110y ; fxrstor [esi]\r
-@@: \r
- add esp, 512\r
-\r
- ;; UINT32 Dr0, Dr1, Dr2, Dr3, Dr6, Dr7;\r
- pop eax\r
- mov dr0, eax\r
- pop eax\r
- mov dr1, eax\r
- pop eax\r
- mov dr2, eax\r
- pop eax\r
- mov dr3, eax\r
- ;; skip restore of dr6. We cleared dr6 during the context save.\r
- add esp, 4\r
- pop eax\r
- mov dr7, eax\r
-\r
- ;; set EFlags\r
- pop dword ptr [ebp + 4 * 5] ; set EFLAGS in stack\r
-\r
- ;; UINT32 Ldtr, Tr;\r
- ;; UINT32 Gdtr[2], Idtr[2];\r
- ;; Best not let anyone mess with these particular registers...\r
- add esp, 24\r
-\r
- ;; UINT32 Eip;\r
- pop dword ptr [ebp + 4 * 3] ; set EIP in stack\r
-\r
- ;; UINT32 Gs, Fs, Es, Ds, Cs, Ss;\r
- ;; NOTE - modified segment registers could hang the debugger... We\r
- ;; could attempt to insulate ourselves against this possibility,\r
- ;; but that poses risks as well.\r
- ;;\r
- pop gs\r
- pop fs\r
- pop es\r
- pop ds\r
- pop dword ptr [ebp + 4 * 4] ; set CS in stack\r
- pop ss\r
-\r
- ;; UINT32 Cr0, Cr1, Cr2, Cr3, Cr4;\r
- pop eax\r
- mov cr0, eax\r
- add esp, 4 ; skip for Cr1\r
- pop eax\r
- mov cr2, eax\r
- pop eax\r
- mov cr3, eax\r
- pop eax\r
- mov cr4, eax\r
-\r
- ;; restore general register\r
- pop edi\r
- pop esi\r
- pop dword ptr [ebp] ; save updated ebp\r
- pop dword ptr [ebp + 4] ; save updated esp\r
- pop edx\r
- pop ecx\r
- pop ebx\r
- pop eax\r
-\r
- mov esp, ebp\r
- pop ebp ; restore ebp maybe updated\r
- pop esp ; restore esp maybe updated\r
- sub esp, 4 * 3 ; restore interupt pushced stack\r
-\r
- iretd\r
-\r
-END\r
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