+++ /dev/null
-;------------------------------------------------------------------------------\r
-;*\r
-;* Copyright (c) 2006 - 2011, 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
-;* efi32.asm\r
-;* \r
-;* Abstract:\r
-;*\r
-;------------------------------------------------------------------------------\r
-\r
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;\r
-; Now in 32-bit protected mode.\r
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;\r
-\r
- .486\r
- .model flat \r
- .stack\r
- .code\r
- org 21000h\r
- \r
-DEFAULT_HANDLER_SIZE EQU INT1 - INT0\r
-\r
-JmpCommonIdtEntry macro\r
- ; jmp commonIdtEntry - this must be hand coded to keep the assembler from\r
- ; using a 8 bit reletive jump when the entries are\r
- ; within 255 bytes of the common entry. This must\r
- ; be done to maintain the consistency of the size\r
- ; of entry points...\r
- db 0e9h ; jmp 16 bit relative \r
- dd commonIdtEntry - $ - 4 ; offset to jump to\r
-endm \r
-\r
- \r
-Start: \r
- mov ax,bx ; flat data descriptor in BX\r
- mov ds,ax\r
- mov es,ax\r
- mov fs,ax\r
- mov gs,ax\r
- mov ss,ax\r
- mov esp,0001ffff0h\r
-\r
- call ClearScreen\r
-\r
- ; Populate IDT with meaningful offsets for exception handlers...\r
- sidt fword ptr [Idtr] ; get fword address of IDT\r
-\r
- mov eax, offset Halt\r
- mov ebx, eax ; use bx to copy 15..0 to descriptors\r
- shr eax, 16 ; use ax to copy 31..16 to descriptors \r
- mov ecx, 78h ; 78h IDT entries to initialize with unique entry points (exceptions)\r
- mov esi, [offset Idtr + 2]\r
- mov edi, [esi]\r
- \r
-@@: ; loop through all IDT entries exception handlers and initialize to default handler\r
- mov word ptr [edi], bx ; write bits 15..0 of offset\r
- mov word ptr [edi+2], 20h ; SYS_CODE_SEL from GDT\r
- mov word ptr [edi+4], 0e00h OR 8000h ; type = 386 interrupt gate, present\r
- mov word ptr [edi+6], ax ; write bits 31..16 of offset\r
- add edi, 8 ; move up to next descriptor\r
- add bx, DEFAULT_HANDLER_SIZE ; move to next entry point\r
- loop @b ; loop back through again until all descriptors are initialized\r
- \r
- ;; at this point edi contains the offset of the descriptor for INT 20\r
- ;; and bx contains the low 16 bits of the offset of the default handler\r
- ;; so initialize all the rest of the descriptors with these two values...\r
-; mov ecx, 101 ; there are 100 descriptors left (INT 20 (14h) - INT 119 (77h)\r
-;@@: ; loop through all IDT entries exception handlers and initialize to default handler\r
-; mov word ptr [edi], bx ; write bits 15..0 of offset\r
-; mov word ptr [edi+2], 20h ; SYS_CODE_SEL from GDT\r
-; mov word ptr [edi+4], 0e00h OR 8000h ; type = 386 interrupt gate, present\r
-; mov word ptr [edi+6], ax ; write bits 31..16 of offset\r
-; add edi, 8 ; move up to next descriptor\r
-; loop @b ; loop back through again until all descriptors are initialized\r
- \r
- \r
-;; DUMP location of IDT and several of the descriptors\r
-; mov ecx, 8\r
-; mov eax, [offset Idtr + 2]\r
-; mov eax, [eax]\r
-; mov edi, 0b8000h\r
-; call PrintDword\r
-; mov esi, eax\r
-; mov edi, 0b80a0h\r
-; jmp OuterLoop\r
- \r
-;; \r
-;; just for fun, let's do a software interrupt to see if we correctly land in the exception handler...\r
-; mov eax, 011111111h\r
-; mov ebx, 022222222h\r
-; mov ecx, 033333333h\r
-; mov edx, 044444444h\r
-; mov ebp, 055555555h\r
-; mov esi, 066666666h\r
-; mov edi, 077777777h\r
-; push 011111111h\r
-; push 022222222h\r
-; push 033333333h\r
-; int 119\r
-\r
- \r
- mov esi,022000h ; esi = 22000\r
- mov eax,[esi+014h] ; eax = [22014]\r
- add esi,eax ; esi = 22000 + [22014] = Base of EFILDR.C\r
- mov ebp,[esi+03ch] ; ebp = [22000 + [22014] + 3c] = NT Image Header for EFILDR.C\r
- add ebp,esi\r
- mov edi,[ebp+034h] ; edi = [[22000 + [22014] + 3c] + 30] = ImageBase\r
- mov eax,[ebp+028h] ; eax = [[22000 + [22014] + 3c] + 24] = EntryPoint\r
- add eax,edi ; eax = ImageBase + EntryPoint\r
- mov dword ptr [EfiLdrOffset],eax ; Modify far jump instruction for correct entry point\r
-\r
- mov bx,word ptr[ebp+6] ; bx = Number of sections\r
- xor eax,eax\r
- mov ax,word ptr[ebp+014h] ; ax = Optional Header Size\r
- add ebp,eax\r
- add ebp,018h ; ebp = Start of 1st Section\r
-\r
-SectionLoop:\r
- push esi ; Save Base of EFILDR.C\r
- push edi ; Save ImageBase\r
- add esi,[ebp+014h] ; esi = Base of EFILDR.C + PointerToRawData\r
- add edi,[ebp+00ch] ; edi = ImageBase + VirtualAddress\r
- mov ecx,[ebp+010h] ; ecs = SizeOfRawData\r
-\r
- cld\r
- shr ecx,2\r
- rep movsd\r
-\r
- pop edi ; Restore ImageBase\r
- pop esi ; Restore Base of EFILDR.C\r
-\r
- add bp,028h ; ebp = ebp + 028h = Pointer to next section record\r
- dec bx\r
- cmp bx,0\r
- jne SectionLoop\r
-\r
- movzx eax, word ptr [Idtr] ; get size of IDT\r
- inc eax\r
- add eax, dword ptr [Idtr + 2] ; add to base of IDT to get location of memory map...\r
- push eax ; push memory map location on stack for call to EFILDR...\r
-\r
- push eax ; push return address (useless, just for stack balance)\r
- db 0b8h\r
-EfiLdrOffset:\r
- dd 000401000h ; Offset of EFILDR\r
-; mov eax, 401000h\r
- push eax\r
- ret\r
-\r
-; db "**** DEFAULT IDT ENTRY ***",0\r
- align 02h\r
-Halt:\r
-INT0:\r
- push 0h ; push error code place holder on the stack\r
- push 0h\r
- JmpCommonIdtEntry\r
-; db 0e9h ; jmp 16 bit reletive \r
-; dd commonIdtEntry - $ - 4 ; offset to jump to\r
- \r
-INT1:\r
- push 0h ; push error code place holder on the stack\r
- push 1h\r
- JmpCommonIdtEntry\r
- \r
-INT2:\r
- push 0h ; push error code place holder on the stack\r
- push 2h\r
- JmpCommonIdtEntry\r
- \r
-INT3:\r
- push 0h ; push error code place holder on the stack\r
- push 3h\r
- JmpCommonIdtEntry\r
- \r
-INT4:\r
- push 0h ; push error code place holder on the stack\r
- push 4h\r
- JmpCommonIdtEntry\r
- \r
-INT5:\r
- push 0h ; push error code place holder on the stack\r
- push 5h\r
- JmpCommonIdtEntry\r
- \r
-INT6:\r
- push 0h ; push error code place holder on the stack\r
- push 6h\r
- JmpCommonIdtEntry\r
- \r
-INT7:\r
- push 0h ; push error code place holder on the stack\r
- push 7h\r
- JmpCommonIdtEntry\r
- \r
-INT8:\r
-; Double fault causes an error code to be pushed so no phony push necessary\r
- nop\r
- nop\r
- push 8h\r
- JmpCommonIdtEntry\r
- \r
-INT9:\r
- push 0h ; push error code place holder on the stack\r
- push 9h\r
- JmpCommonIdtEntry\r
- \r
-INT10:\r
-; Invalid TSS causes an error code to be pushed so no phony push necessary\r
- nop\r
- nop\r
- push 10\r
- JmpCommonIdtEntry\r
- \r
-INT11:\r
-; Segment Not Present causes an error code to be pushed so no phony push necessary\r
- nop\r
- nop\r
- push 11\r
- JmpCommonIdtEntry\r
- \r
-INT12:\r
-; Stack fault causes an error code to be pushed so no phony push necessary\r
- nop\r
- nop\r
- push 12\r
- JmpCommonIdtEntry\r
- \r
-INT13:\r
-; GP fault causes an error code to be pushed so no phony push necessary\r
- nop\r
- nop\r
- push 13\r
- JmpCommonIdtEntry\r
- \r
-INT14:\r
-; Page fault causes an error code to be pushed so no phony push necessary\r
- nop\r
- nop\r
- push 14\r
- JmpCommonIdtEntry\r
- \r
-INT15:\r
- push 0h ; push error code place holder on the stack\r
- push 15\r
- JmpCommonIdtEntry\r
- \r
-INT16:\r
- push 0h ; push error code place holder on the stack\r
- push 16\r
- JmpCommonIdtEntry\r
- \r
-INT17:\r
-; Alignment check causes an error code to be pushed so no phony push necessary\r
- nop\r
- nop\r
- push 17\r
- JmpCommonIdtEntry\r
- \r
-INT18:\r
- push 0h ; push error code place holder on the stack\r
- push 18\r
- JmpCommonIdtEntry\r
- \r
-INT19:\r
- push 0h ; push error code place holder on the stack\r
- push 19\r
- JmpCommonIdtEntry\r
-\r
-INTUnknown:\r
-REPEAT (78h - 20)\r
- push 0h ; push error code place holder on the stack\r
-; push xxh ; push vector number\r
- db 06ah\r
- db ( $ - INTUnknown - 3 ) / 9 + 20 ; vector number\r
- JmpCommonIdtEntry\r
-ENDM\r
-\r
-commonIdtEntry:\r
- pushad\r
- mov ebp, esp\r
-;;\r
-;; At this point the stack looks like this:\r
-;;\r
-;; eflags\r
-;; Calling CS\r
-;; Calling EIP\r
-;; Error code or 0\r
-;; Int num or 0ffh for unknown int num\r
-;; eax\r
-;; ecx\r
-;; edx\r
-;; ebx\r
-;; esp\r
-;; ebp\r
-;; esi\r
-;; edi <------- ESP, EBP\r
-;; \r
-\r
- call ClearScreen\r
- mov esi, offset String1\r
- call PrintString\r
- mov eax, [ebp + 32] ;; move Int number into EAX \r
- cmp eax, 19\r
- ja PrintDefaultString\r
-PrintExceptionString:\r
- shl eax, 2 ;; multiply by 4 to get offset from StringTable to actual string address\r
- add eax, offset StringTable\r
- mov esi, [eax]\r
- jmp PrintTheString\r
-PrintDefaultString:\r
- mov esi, offset IntUnknownString\r
- ; patch Int number\r
- mov edx, eax\r
- call A2C\r
- mov [esi + 1], al\r
- mov eax, edx\r
- shr eax, 4\r
- call A2C\r
- mov [esi], al\r
-PrintTheString: \r
- call PrintString\r
- mov esi, offset String2\r
- call PrintString\r
- mov eax, [ebp+44] ; CS\r
- call PrintDword\r
- mov al, ':'\r
- mov byte ptr [edi], al\r
- add edi, 2\r
- mov eax, [ebp+40] ; EIP\r
- call PrintDword\r
- mov esi, offset String3\r
- call PrintString\r
- \r
- mov edi, 0b8140h\r
- \r
- mov esi, offset StringEax ; eax\r
- call PrintString\r
- mov eax, [ebp+28]\r
- call PrintDword\r
- \r
- mov esi, offset StringEbx ; ebx\r
- call PrintString\r
- mov eax, [ebp+16]\r
- call PrintDword\r
- \r
- mov esi, offset StringEcx ; ecx\r
- call PrintString\r
- mov eax, [ebp+24]\r
- call PrintDword\r
- \r
- mov esi, offset StringEdx ; edx\r
- call PrintString\r
- mov eax, [ebp+20]\r
- call PrintDword\r
- \r
- mov esi, offset StringEcode ; error code\r
- call PrintString\r
- mov eax, [ebp+36]\r
- call PrintDword\r
- \r
- mov edi, 0b81e0h\r
- \r
- mov esi, offset StringEsp ; esp\r
- call PrintString\r
- mov eax, [ebp+12]\r
- call PrintDword\r
- \r
- mov esi, offset StringEbp ; ebp\r
- call PrintString\r
- mov eax, [ebp+8]\r
- call PrintDword\r
- \r
- mov esi, offset StringEsi ; esi\r
- call PrintString\r
- mov eax, [ebp+4]\r
- call PrintDword\r
- \r
- mov esi, offset StringEdi ; edi\r
- call PrintString\r
- mov eax, [ebp]\r
- call PrintDword\r
- \r
- mov esi, offset StringEflags ; eflags\r
- call PrintString\r
- mov eax, [ebp+48]\r
- call PrintDword\r
- \r
- mov edi, 0b8320h\r
-\r
- mov esi, ebp\r
- add esi, 52\r
- mov ecx, 8\r
-\r
- \r
-OuterLoop:\r
- push ecx\r
- mov ecx, 8\r
- mov edx, edi\r
-\r
-InnerLoop:\r
- mov eax, [esi]\r
- call PrintDword\r
- add esi, 4\r
- mov al, ' '\r
- mov [edi], al\r
- add edi, 2\r
- loop InnerLoop\r
-\r
- pop ecx\r
- add edx, 0a0h\r
- mov edi, edx\r
- loop OuterLoop\r
-\r
-\r
- mov edi, 0b8960h\r
-\r
- mov eax, [ebp+40] ; EIP\r
- sub eax, 32 * 4\r
- mov esi, eax ; esi = eip - 32 DWORD linear (total 64 DWORD)\r
-\r
- mov ecx, 8\r
- \r
-OuterLoop1:\r
- push ecx\r
- mov ecx, 8\r
- mov edx, edi\r
-\r
-InnerLoop1:\r
- mov eax, [esi]\r
- call PrintDword\r
- add esi, 4\r
- mov al, ' '\r
- mov [edi], al\r
- add edi, 2\r
- loop InnerLoop1\r
-\r
- pop ecx\r
- add edx, 0a0h\r
- mov edi, edx\r
- loop OuterLoop1\r
-\r
-\r
-\r
-; wbinvd ; Ken: this intruction does not support in early than 486 arch\r
-@@: \r
- jmp @b\r
-;\r
-; return\r
-;\r
- mov esp, ebp\r
- popad\r
- add esp, 8 ; error code and INT number\r
- \r
- iretd\r
-\r
-\r
-PrintString:\r
- push eax\r
-@@:\r
- mov al, byte ptr [esi]\r
- cmp al, 0\r
- je @f\r
- mov byte ptr [edi], al\r
- inc esi\r
- add edi, 2\r
- jmp @b\r
-@@:\r
- pop eax\r
- ret\r
- \r
-;; EAX contains dword to print\r
-;; EDI contains memory location (screen location) to print it to\r
-PrintDword:\r
- push ecx\r
- push ebx\r
- push eax\r
- \r
- mov ecx, 8\r
-looptop:\r
- rol eax, 4\r
- mov bl, al\r
- and bl, 0fh\r
- add bl, '0'\r
- cmp bl, '9'\r
- jle @f\r
- add bl, 7\r
-@@:\r
- mov byte ptr [edi], bl\r
- add edi, 2\r
- loop looptop\r
- ;wbinvd\r
- \r
- pop eax\r
- pop ebx\r
- pop ecx\r
- ret\r
-\r
-ClearScreen:\r
- push eax\r
- push ecx\r
- \r
- mov al, ' '\r
- mov ah, 0ch\r
- mov edi, 0b8000h\r
- mov ecx, 80 * 24\r
-@@:\r
- mov word ptr [edi], ax\r
- add edi, 2\r
- loop @b\r
- mov edi, 0b8000h\r
- \r
- pop ecx\r
- pop eax\r
-\r
- ret \r
- \r
-A2C:\r
- and al, 0fh\r
- add al, '0'\r
- cmp al, '9'\r
- jle @f\r
- add al, 7\r
-@@:\r
- ret\r
- \r
-String1 db "*** INT ",0\r
-\r
-Int0String db "00h Divide by 0 -",0\r
-Int1String db "01h Debug exception -",0\r
-Int2String db "02h NMI -",0\r
-Int3String db "03h Breakpoint -",0\r
-Int4String db "04h Overflow -",0\r
-Int5String db "05h Bound -",0\r
-Int6String db "06h Invalid opcode -",0\r
-Int7String db "07h Device not available -",0\r
-Int8String db "08h Double fault -",0\r
-Int9String db "09h Coprocessor seg overrun (reserved) -",0\r
-Int10String db "0Ah Invalid TSS -",0\r
-Int11String db "0Bh Segment not present -",0\r
-Int12String db "0Ch Stack fault -",0\r
-Int13String db "0Dh General protection fault -",0\r
-Int14String db "0Eh Page fault -",0\r
-Int15String db "0Fh (Intel reserved) -",0\r
-Int16String db "10h Floating point error -",0\r
-Int17String db "11h Alignment check -",0\r
-Int18String db "12h Machine check -",0\r
-Int19String db "13h SIMD Floating-Point Exception -",0\r
-IntUnknownString db "??h Unknown interrupt -",0\r
-\r
-StringTable dd offset Int0String, offset Int1String, offset Int2String, offset Int3String, \r
- offset Int4String, offset Int5String, offset Int6String, offset Int7String,\r
- offset Int8String, offset Int9String, offset Int10String, offset Int11String,\r
- offset Int12String, offset Int13String, offset Int14String, offset Int15String,\r
- offset Int16String, offset Int17String, offset Int18String, offset Int19String\r
-\r
-String2 db " HALT!! *** (",0\r
-String3 db ")",0\r
-StringEax db "EAX=",0\r
-StringEbx db " EBX=",0\r
-StringEcx db " ECX=",0\r
-StringEdx db " EDX=",0\r
-StringEcode db " ECODE=",0\r
-StringEsp db "ESP=",0\r
-StringEbp db " EBP=",0\r
-StringEsi db " ESI=",0\r
-StringEdi db " EDI=",0\r
-StringEflags db " EFLAGS=",0\r
-\r
-Idtr df 0\r
-\r
- org 21ffeh\r
-BlockSignature:\r
- dw 0aa55h\r
- \r
- end\r
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