| ;␊ |
| ; Set to 1 to enable obscure debug messages.␊ |
| ;␊ |
| DEBUG␉␉␉␉EQU␉␉CONFIG_BOOT1_HFS_DEBUG␊ |
| SIMPLEDEBUG␉␉␉␉EQU␉␉1 ; only print_char for space reason␊ |
| DEBUG␉␉␉␉EQU␉␉0␊ |
| ␊ |
| ;␊ |
| ; Set to 1 to enable unused code.␊ |
|
| ;␊ |
| ; Set to 1 to enable verbose mode.␊ |
| ;␊ |
| VERBOSE␉␉␉␉EQU␉␉CONFIG_BOOT1_HFS_VERBOSE␊ |
| VERBOSE␉␉␉␉EQU␉␉0␊ |
| ␊ |
| ;␊ |
| ; Various constants.␊ |
|
| maxNodeSize␉␉␉EQU␉␉16384␊ |
| ␊ |
| kSectorBytes␉␉EQU␉␉512␉␉␉␉␉␉␉␉␉; sector size in bytes␊ |
| kChameleonBoot1hSignature␉␉EQU␉␉0xBB99␉␉␉␉␉␉␉␉; boot sector signature␊ |
| kBootSignature␉␉EQU␉␉0xAA55␉␉␉␉␉␉␉␉; boot sector signature␊ |
| ␊ |
| kBoot1StackAddress␉EQU␉␉0xFFF0␉␉␉␉␉␉␉␉; boot1 stack pointer␊ |
|
| ; giving the size of the structure.␊ |
| ;␊ |
| ␉␉␉struc part␊ |
| .bootid␉␉resb 1␉␉; bootable or not ␊ |
| .head␉␉resb 1␉␉; starting head, sector, cylinder␊ |
| .sect␉␉resb 1␉␉;␊ |
| .cyl␉␉resb 1␉␉;␊ |
| .type␉␉resb 1␉␉; partition type␊ |
| .endhead␉resb 1␉␉; ending head, sector, cylinder␊ |
| .endsect␉resb 1␉␉;␊ |
| .endcyl␉␉resb 1␉␉;␊ |
| .lba␉␉resd 1␉␉; starting lba␊ |
| .sectors␉resd 1␉␉; size in sectors␊ |
| ␉␉␉endstruc␊ |
| ;.bootid␉␉resb 1␉␉; bootable or not ␊ |
| ;.head␉␉resb 1␉␉; starting head, sector, cylinder␊ |
| ;.sect␉␉resb 1␉␉;␊ |
| ;.cyl␉␉resb 1␉␉;␊ |
| ;.type␉␉resb 1␉␉; partition type␊ |
| ;.endhead␉resb 1␉␉; ending head, sector, cylinder␊ |
| ;.endsect␉resb 1␉␉;␊ |
| ;.endcyl␉␉resb 1␉␉;␊ |
| ;.lba␉␉resd 1␉␉; starting lba␊ |
| ;.sectors␉resd 1␉␉; size in sectors␊ |
| ;␉␉␉endstruc␊ |
| ␉␉␉␉␉␉ ␉struc␉gpta␊ |
| .PartitionTypeGUID␉␉␉resb␉16␊ |
| .UniquePartitionGUID␉␉resb␉16␊ |
| .StartingLBA␉␉␉␉resb␉8␊ |
| .EndingLBA␉␉␉␉␉resb␉8␊ |
| ;.Attributes␉␉␉␉␉resb␉8␊ |
| ;.PartitionName␉␉␉␉resb␉72␊ |
| ␉␉␉␉␉␉␉endstruc␊ |
| ␊ |
| ;-------------------------------------------------------------------------␊ |
| ; HFS+ related structures and constants␊ |
|
| ␉ret␊ |
| %endmacro␊ |
| ␊ |
| %macro DebugCharMacro 1␊ |
| ␉pushad␊ |
| ␉mov␉␉al, %1␊ |
| ␉call␉print_char␊ |
| ␉call␉getc␊ |
| ␉popad␊ |
| %endmacro␊ |
| ␊ |
| %macro PrintCharMacro 1␊ |
| ␉pushad␊ |
| ␉mov␉␉al, %1␊ |
| ␉call␉print_char␊ |
| ␉popad␊ |
| %endmacro␊ |
| ␊ |
| %macro PutCharMacro 1␊ |
| ␉call␉print_char␊ |
| %macro PrintHexEaxMacro 0␊ |
| ␉call␉print_hex␊ |
| %endmacro␊ |
| ␊ |
| %macro PrintHexMacro 1␊ |
| ␉mov eax, %1␊ |
| ␉call␉print_hex␊ |
| %endmacro␊ |
| ␊ |
|
| ␉call␉print_string␊ |
| %endmacro␊ |
| ␊ |
| %macro LogString 1␊ |
| %macro LogStringMacro 1␊ |
| ␉mov␉␉di, %1␊ |
| ␉call␉log_string␊ |
| %endmacro␊ |
| ␊ |
| %if SIMPLEDEBUG␊ |
| %define PrintChar(x) PrintCharMacro x␊ |
| %else␊ |
| %define PrintChar(x)␊ |
| %endif␊ |
| ␊ |
| %if DEBUG␊ |
| %define DebugChar(x) DebugCharMacro x␊ |
| %define PrintChar(x) PrintCharMacro x␊ |
| %define PutChar(x) PutCharMacro␊ |
| %define PrintHex(x) PrintHexMacro x␊ |
| %define PrintHexEax PrintHexEaxMacro␊ |
| %else␊ |
| %define DebugChar(x)␊ |
| %define PrintChar(x)␊ |
| %define PutChar(x)␊ |
| %define PrintHex(x)␊ |
| %define PrintHexEax␊ |
| %endif␊ |
| ␊ |
| %if VERBOSE␊ |
| %define LogString(x) LogStringMacro x␊ |
| %else␊ |
| %define LogString(x)␊ |
| %endif␊ |
| ␉␊ |
| ;--------------------------------------------------------------------------␊ |
| ; Start of text segment.␊ |
|
| ; Set up the stack to grow down from kBoot1StackSegment:kBoot1StackAddress.␊ |
| ; Interrupts should be off while the stack is being manipulated.␊ |
| ;␊ |
| ␊ |
| cli ; interrupts off␊ |
| xor␉␉ax, ax ; zero ax␊ |
| mov␉␉ss, ax ; ss <- 0␊ |
|
| mov ds, ax ; ds <- 0␊ |
| mov es, ax ; es <- 0␊ |
| ␊ |
| ␉push ecx ; save the current partition LBA offset. will be poped after reloc␊ |
| ␊ |
| ;␊ |
| ; Relocate boot1 code.␊ |
| ;␊ |
|
| mov␉␉cx, kSectorBytes␉␉; copy 256 words␊ |
| rep␉␉movsb␉␉␉␉␉; repeat string move (word) operation␊ |
| pop␉␉si␊ |
| ␊ |
| ;␊ |
| ; Code relocated, jump to startReloc in relocated location.␊ |
| ;␊ |
|
| ; Start execution from the relocated location.␊ |
| ;␊ |
| startReloc:␊ |
| ␉PrintChar ('>')␊ |
| ␊ |
| ;␊ |
| ; Initializing global variables.␊ |
| ;␊ |
| mov eax, [si + part.lba]␊ |
| mov [gPartLBA], eax␉␉␉␉␉; save the current partition LBA offset␊ |
| ␉pop ecx ␊ |
| ;PrintHex(ecx)␊ |
| mov DWORD [gPartLBA], ecx␉␉␉; save the current partition LBA offset␊ |
| mov [gBIOSDriveNumber], dl␉␉␉; save BIOS drive number␊ |
| mov [gBIOSDrivePartNumber], dh␉␉␉; save BIOS drive number␊ |
| ␉mov␉␉WORD [gMallocPtr], mallocStart␉; set free space pointer␊ |
| ␊ |
| ␉PrintHex([gPartLBA])␊ |
| ␉xor eax,eax␊ |
| ␉mov al,[gBIOSDriveNumber]␊ |
| ␉PrintHexEax␊ |
| ␉xor eax,eax␊ |
| ␉mov al,[gBIOSDrivePartNumber]␊ |
| ␉PrintHexEax␊ |
| ␊ |
| ;␊ |
| ; Loading upper 512 bytes of boot1h and HFS+ Volume Header.␊ |
| ;␊ |
|
| mov al, 2␉␉␉␉␉␉␉; read 2 sectors: sector 1 of boot1h + HFS+ Volume Header␊ |
| mov edx, kBoot1Sector1Addr␊ |
| call readLBA␊ |
| ;␉PrintChar ('2')␊ |
| ␊ |
| ;␊ |
| ; Initializing more global variables.␊ |
|
| ␉shr␉␉eax, 9␉␉␉␉␉␉␉; convert to sector unit␊ |
| ␉mov␉␉[gBlockSize], eax␉␉␉␉; save blockSize as little-endian sector unit!␊ |
| ␊ |
| ;␉PrintChar ('3')␊ |
| ␊ |
| ␉;␊ |
| ␉; Looking for HFSPlus ('H+') or HFSPlus case-sensitive ('HX') signature.␊ |
| ␉;␊ |
|
| ; Find stage2 boot file in a HFS+ Volume's root folder.␊ |
| ;␊ |
| findRootBoot:␊ |
| ␉PrintChar ('!')␊ |
| ;%if 0␊ |
| ␉mov␉␉al, kHFSCatalogFileID␊ |
| ␉lea␉␉si, [searchCatalogKey]␊ |
| ␉lea␉␉di, [kHFSPlusBuffer + HFSPlusVolumeHeader.catalogFile + HFSPlusForkData.extents]␊ |
|
| ␉lea␉␉di, [si + HFSPlusCatalogFile.dataFork + HFSPlusForkData.extents]␊ |
| ␉call␉readExtent␊ |
| ␊ |
| %if VERBOSE␊ |
| ␉LogString(root_str)␊ |
| %endif␊ |
| ␊ |
| boot2:␊ |
| ␉PrintChar ('J')␊ |
| ␊ |
| %if DEBUG␊ |
| ␉DebugChar ('!')␊ |
| %endif␊ |
| ␊ |
| %if UNUSED␊ |
| ␉;␊ |
| ␉; Waiting for a key press.␊ |
| ␉;␊ |
| ␊ |
| mov ah, 0␊ |
| int␉␉0x16␊ |
| %endif␊ |
| ␊ |
| mov dl, [gBIOSDriveNumber]␉␉␉; load BIOS drive number␊ |
| mov dh, [gBIOSDrivePartNumber]␉␉␉; load part number␊ |
| jmp kBoot2Segment:kBoot2Address␊ |
| ;%endif␉␊ |
| ␊ |
| error:␊ |
| ␉PrintChar ('E')␊ |
| LogString(error_str)␊ |
| ␊ |
| %if VERBOSE␊ |
| LogString(error_str)␊ |
| %endif␊ |
| ␉␊ |
| hang:␊ |
| hlt␊ |
| call getc␊ |
| jmp hang␊ |
| ␊ |
| ;--------------------------------------------------------------------------␊ |
|
| ␊ |
| %endif ; VERBOSE␊ |
| ␊ |
| %if SIMPLEDEBUG␊ |
| ␊ |
| ;--------------------------------------------------------------------------␊ |
| ; Write a ASCII character to the console.␊ |
| ;␊ |
| ; Arguments:␊ |
| ; AL = ASCII character.␊ |
| ;␊ |
| print_char:␊ |
| pushad␊ |
| mov bx, 1 ␉␉; BH=0, BL=1 (blue)␊ |
| mov ah, 0x0e ␉␉; bios INT 10, Function 0xE␊ |
| int 0x10 ␉␉; display byte in tty mode␊ |
| popad␊ |
| ret␊ |
| ␊ |
| %endif␊ |
| ␊ |
| ␊ |
| %if DEBUG␊ |
| ␊ |
| %if UNUSED␊ |
| ␊ |
| ;--------------------------------------------------------------------------␊ |
| ; Write the 4-byte value to the console in hex.␊ |
| ;␊ |
|
| ror eax, 8␊ |
| loop .loop␊ |
| ␊ |
| %if UNUSED␊ |
| ;%if UNUSED␊ |
| ␉mov al, 10␉␉␉␉␉␉␉; carriage return␊ |
| ␉call print_char␊ |
| ␉mov al, 13␊ |
| ␉call print_char␊ |
| %endif ; UNUSED␊ |
| ;%endif ; UNUSED␊ |
| ␊ |
| popad␊ |
| ret␊ |
|
| call print_char␊ |
| ret␊ |
| ␊ |
| %endif ; UNUSED␊ |
| ␊ |
| ;--------------------------------------------------------------------------␊ |
| ; getc - wait for a key press␊ |
| ;␊ |
|
| ; Azi: boot1h.s:994: error: TIMES value -67 is negative␊ |
| ;␊ |
| pad_table_and_sig:␊ |
| ␉times␉␉␉510-($-$$) db 0␊ |
| ␉dw␉␉␉␉kBootSignature␊ |
| ␉times␉␉␉508-($-$$) db 0␊ |
| ␉dw kChameleonBoot1hSignature␊ |
| ␉dw␉␉␉␉kBootSignature // remove this ! Don't forgot boot0.s, line 419 : -4 become -2␊ |
| ␊ |
| ;␊ |
| ; Sector 1 code area␊ |
|
| ␉mov␉␉si, di␊ |
| ␉lodsd␊ |
| ␉PrintChar('k')␊ |
| ␉PrintHex()␊ |
| ␉PrintHexEax()␊ |
| ␉lodsw␊ |
| ␉cmp␉␉ax, 0␊ |
| ␉je␉␉.printExit␊ |
|
| ␉mov␉␉si, di␊ |
| ␉xor␉␉eax, eax␊ |
| ␉lodsw␊ |
| ␉PrintHex()␊ |
| ␉PrintHexEax()␊ |
| ␉lodsd␊ |
| ␉PrintHex()␊ |
| ␉PrintHexEax()␊ |
| ␉lodsd␊ |
| ␉PrintHex()␊ |
| ␉PrintHexEax()␊ |
| ␉popad␊ |
| ;␊ |
| ;␊ |
|
| ␊ |
| ␉ABSOLUTE␉␉kHFSPlusBuffer + HFSPlusVolumeHeader_size␊ |
| ␊ |
| gPartLBA␉␉␉resd␉1␊ |
| gPartLBA␉␉␉resd␉4␊ |
| gBIOSDriveNumber␉resw␉1␊ |
| gBIOSDrivePartNumber␉resw␉1␊ |
| gBlockSize␉␉␉resd␉1␊ |
| gMallocPtr␉␉␉resw␉1␊ |
| ␊ |
