; trackbuf area (1000h). The routine bcopy_over_self handles this mode
; of operation, including any necessary adjustments.
;
- align 4
+ section .text
+ align 8
__bcopy_start:
+ ; This is in the .text segment since it needs to be
+ ; contiguous with the rest of the bcopy stuff
+
bcopy_gdt: dw bcopy_gdt_size-1 ; Null descriptor - contains GDT
.adj1: dd bcopy_gdt ; pointer for LGDT instruction
dw 0
popfd
jmp 0:7c00h
__bcopy_end:
+
+ section .bss
+A20Test resw 1 ; Counter for testing status of A20
+A20Type resw 1 ; A20 type
+A20Tries resb 1 ; Times until giving up on A20
pm_entry: equ 0x101000
bits 16
- align 2
+ section .data
+ align 2, db 0
com32_pmidt:
dw 8*256 ; Limit
dd pm_idt ; Address
dw 0ffffh ; Limit
dd 0 ; Address
+ section .text
is_com32_image:
push si ; Save file handle
push dx ; File length held in DX:AX
ret ; Return to 32-bit program
bits 16
+
+ section .bss
+ alignb 4
+PMESP resd 1 ; Protected-mode ESP
+Com32SysSP resw 1 ; SP saved during COM32 syscall
+
+ section .text
;; Common code for running a COMBOOT image
;;
+ section .text
+
; Parameter registers definition; this is the definition
; of the stack frame used by INT 21h and INT 22h.
%define P_FLAGS word [bp+44]
clc
ret
-;
-; This stuff should really be in the data section...
-;
+ section .bss
+SavedSSSP resd 1 ; Our SS:SP while running a COMBOOT image
+
+ section .data
%macro int21 2
db %1
dw %2
;
; loadkeys: Load a LILO-style keymap; SI and DX:AX set by searchdir
;
+ section .text
+
loadkeys:
and dx,dx ; Should be 256 bytes exactly
jne loadkeys_ret
popad
ret
%endif ; DEBUG_TRACERS
+
+ section .bss
+ alignb 2
+NextCharJump resw 1 ; Routine to interpret next print char
+CursorDX equ $
+CursorCol resb 1 ; Cursor column for message file
+CursorRow resb 1 ; Cursor row for message file
+ScreenSize equ $
+VidCols resb 1 ; Columns on screen-1
+VidRows resb 1 ; Rows on screen-1
+
+; Serial console stuff...
+BaudDivisor resw 1 ; Baud rate divisor
+FlowControl equ $
+FlowOutput resb 1 ; Outputs to assert for serial flow
+FlowInput resb 1 ; Input bits for serial flow
+FlowIgnore resb 1 ; Ignore input unless these bits set
+
+TextAttribute resb 1 ; Text attribute for message file
+DisplayMask resb 1 ; Display modes mask
;; VGA font handling code
;;
+ section .text
+
;
; loadfont: Load a .psf font file and install it onto the VGA console
; (if we're not on a VGA screen then ignore.) It is called with
popa
ret
+
+; VGA font buffer at the end of memory (so loading a font works even
+; in graphics mode, but don't put too much pressure on the .bss)
+ section vgafont nobits start=0E000h
+vgafontbuf resb 8192
+
+ section .text
+
;
open:
call searchdir
- jz open_return
+ jz openfd.ret
openfd:
pushf
- mov [FBytes1],ax
- mov [FBytes2],dx
+ mov [FBytes],ax
+ mov [FBytes+2],dx
mov eax,[FBytes]
add eax,SECTOR_SIZE-1
shr eax,SECTOR_SHIFT
mov ax,[EndOfGetCBuf] ; Pointer at end of buffer ->
mov [FPtr],ax ; nothing loaded yet
popf ; Restore no ZF
-open_return: ret
+.ret: ret
getc:
stc ; If we exit here -> EOF
mov ecx,[FBytes]
- jecxz getc_ret
+ jecxz .ret
mov si,[FPtr]
cmp si,[EndOfGetCBuf]
- jb getc_loaded
+ jb .loaded
; Buffer empty -- load another set
mov ecx,[FSectors]
cmp ecx,trackbufsize >> SECTOR_SHIFT
- jna getc_oksize
+ jna .oksize
mov ecx,trackbufsize >> SECTOR_SHIFT
-getc_oksize: sub [FSectors],ecx ; Reduce remaining clusters
+.oksize: sub [FSectors],ecx ; Reduce remaining clusters
mov si,[FNextClust]
push es ; ES may be != DS, save old ES
push ds
mov [FNextClust],si ; Store new next pointer
pop si ; SI -> newly loaded data
pop es ; Restore ES
-getc_loaded: lodsb ; Load a byte, increment SI
+.loaded: lodsb ; Load a byte, increment SI
mov [FPtr],si ; Update next byte pointer
dec dword [FBytes] ; Update bytes left counter
clc ; Not EOF
-getc_ret: ret
+.ret: ret
;
; ungetc: Push a character (in AL) back into the getc buffer
; Otherwise AL = first character after whitespace
;
skipspace:
-skipspace_loop: call getc
- jc skipspace_eof
+.loop: call getc
+ jc .eof
cmp al,1Ah ; DOS EOF
- je skipspace_eof
+ je .eof
cmp al,0Ah
- je skipspace_eoln
+ je .eoln
cmp al,' '
- jbe skipspace_loop
+ jbe .loop
ret ; CF = ZF = 0
-skipspace_eof: cmp al,al ; Set ZF
+.eof: cmp al,al ; Set ZF
stc ; Set CF
ret
-skipspace_eoln: add al,0FFh ; Set CF, clear ZF
+.eoln: add al,0FFh ; Set CF, clear ZF
ret
;
;
getint:
mov di,NumBuf
-gi_getnum: cmp di,NumBufEnd ; Last byte in NumBuf
- jae gi_loaded
+.getnum: cmp di,NumBufEnd ; Last byte in NumBuf
+ jae .loaded
push di
call getc
pop di
- jc gi_loaded
+ jc .loaded
stosb
cmp al,'-'
- jnb gi_getnum
+ jnb .getnum
call ungetc ; Unget non-numeric
-gi_loaded: mov byte [di],0
+.loaded: mov byte [di],0
mov si,NumBuf
; Fall through to parseint
mov ebx,eax ; Accumulator
mov ecx,ebx ; Base
xor bp,bp ; Used for negative flag
-pi_begin: lodsb
+.begin: lodsb
cmp al,'-'
- jne pi_not_minus
+ jne .not_minus
xor bp,1 ; Set unary minus flag
- jmp short pi_begin
-pi_not_minus:
+ jmp short .begin
+.not_minus:
cmp al,'0'
- jb pi_err
- je pi_octhex
+ jb .err
+ je .octhex
cmp al,'9'
- ja pi_err
+ ja .err
mov cl,10 ; Base = decimal
- jmp short pi_foundbase
-pi_octhex:
+ jmp short .foundbase
+.octhex:
lodsb
cmp al,'0'
- jb pi_km ; Value is zero
+ jb .km ; Value is zero
or al,20h ; Downcase
cmp al,'x'
- je pi_ishex
+ je .ishex
cmp al,'7'
- ja pi_err
+ ja .err
mov cl,8 ; Base = octal
- jmp short pi_foundbase
-pi_ishex:
+ jmp short .foundbase
+.ishex:
mov al,'0' ; No numeric value accrued yet
mov cl,16 ; Base = hex
-pi_foundbase:
+.foundbase:
call unhexchar
- jc pi_km ; Not a (hex) digit
+ jc .km ; Not a (hex) digit
cmp al,cl
- jae pi_km ; Invalid for base
+ jae .km ; Invalid for base
imul ebx,ecx ; Multiply accumulated by base
add ebx,eax ; Add current digit
lodsb
- jmp short pi_foundbase
-pi_km:
+ jmp short .foundbase
+.km:
dec si ; Back up to last non-numeric
lodsb
or al,20h
cmp al,'k'
- je pi_isk
+ je .isk
cmp al,'m'
- je pi_ism
+ je .ism
dec si ; Back up
-pi_fini: and bp,bp
- jz pi_ret ; CF=0!
+.fini: and bp,bp
+ jz .ret ; CF=0!
neg ebx ; Value was negative
-pi_done: clc
-pi_ret: pop bp
+.done: clc
+.ret: pop bp
pop ecx
pop eax
ret
-pi_err: stc
- jmp short pi_ret
-pi_isk: shl ebx,10 ; x 2^10
- jmp short pi_done
-pi_ism: shl ebx,20 ; x 2^20
- jmp short pi_done
+.err: stc
+ jmp short .ret
+.isk: shl ebx,10 ; x 2^10
+ jmp short .done
+.ism: shl ebx,20 ; x 2^20
+ jmp short .done
+
+
+ section .bss
+ alignb 4
+NumBuf resb 15 ; Buffer to load number
+NumBufEnd resb 1 ; Last byte in NumBuf
+FBytes resd 1 ; Number of bytes left in getc file
+FSectors resd 1 ; Number of sectors in getc file
+FNextClust resw 1 ; Pointer to next cluster in d:o
+FPtr resw 1 ; Pointer to next char in buffer
;
; unhexchar: Convert a hexadecimal digit in AL to the equivalent number;
; return CF=1 if not a hex digit
;
+ section .text
unhexchar:
cmp al,'0'
- jb uxc_ret ; If failure, CF == 1 already
+ jb .ret ; If failure, CF == 1 already
cmp al,'9'
- ja uxc_1
+ ja .notdigit
sub al,'0' ; CF <- 0
ret
-uxc_1: or al,20h ; upper case -> lower case
+.notdigit: or al,20h ; upper case -> lower case
cmp al,'a'
- jb uxc_ret ; If failure, CF == 1 already
+ jb .ret ; If failure, CF == 1 already
cmp al,'f'
- ja uxc_err
+ ja .err
sub al,'a'-10 ; CF <- 0
ret
-uxc_err: stc
-uxc_ret: ret
+.err: stc
+.ret: ret
;
;
getline:
call skipspace
mov dl,1 ; Empty line -> empty string.
- jz gl_eof ; eof
- jc gl_eoln ; eoln
+ jz .eof ; eof
+ jc .eoln ; eoln
call ungetc
-gl_fillloop: push dx
+.fillloop: push dx
push di
call getc
pop di
pop dx
- jc gl_ret ; CF set!
+ jc .ret ; CF set!
cmp al,' '
- jna gl_ctrl
+ jna .ctrl
xor dx,dx
-gl_store: stosb
- jmp short gl_fillloop
-gl_ctrl: cmp al,10
- je gl_ret ; CF clear!
+.store: stosb
+ jmp short .fillloop
+.ctrl: cmp al,10
+ je .ret ; CF clear!
cmp al,26
- je gl_eof
+ je .eof
and dl,dl
- jnz gl_fillloop ; Ignore multiple spaces
+ jnz .fillloop ; Ignore multiple spaces
mov al,' ' ; Ctrl -> space
inc dx
- jmp short gl_store
-gl_eoln: clc ; End of line is not end of file
- jmp short gl_ret
-gl_eof: stc
-gl_ret: pushf ; We want the last char to be space!
+ jmp short .store
+.eoln: clc ; End of line is not end of file
+ jmp short .ret
+.eof: stc
+.ret: pushf ; We want the last char to be space!
and dl,dl
- jnz gl_xret
+ jnz .xret
mov al,' '
stosb
-gl_xret: popf
+.xret: popf
ret
;
; SI = cluster/socket pointer
;
+ section .text
+
vgadisplayfile:
mov [VGACluster],si
push es
ret
+ section .data
; Map colors to consecutive DAC registers
linear_color db 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 0
UsingVGA db 0
+ section .bss
+ alignb 2
+GraphXSize resw 1 ; Width of splash screen file
+VGAPos resw 1 ; Pointer into VGA memory
+VGACluster resw 1 ; Cluster pointer for VGA image file
+VGAFilePtr resw 1 ; Pointer into VGAFileBuf
+TextColorReg resb 17 ; VGA color registers for text mode
+%if IS_SYSLINUX
+VGAFileBuf resb FILENAME_MAX+2 ; Unmangled VGA image name
+%else
+VGAFileBuf resb FILENAME_MAX ; Unmangled VGA image name
+%endif
+VGAFileBufEnd equ $
+VGAFileMBuf resb FILENAME_MAX ; Mangled VGA image name
+
;; mem= command on the command line while booting a new kernel.
;;
+ section .text
+
;
; This is set up as a subroutine; it will set up the global variable
; HighMemSize. All registers are preserved. Assumes DS == CS.
popad
pop es
ret ; Done!
+
+ section .bss
+ alignb 4
+E820Buf resd 5 ; INT 15:E820 data buffer
+E820Mem resd 1 ; Memory detected by E820
+E820Max resd 1 ; Is E820 memory capped?
+HighMemSize resd 1 ; End of memory pointer (bytes)
getcbuf resb trackbufsize
; ends at 5000h
-VKernelBuf: resb vk_size ; "Current" vkernel
alignb 4
-AppendBuf resb max_cmd_len+1 ; append=
-Ontimeout resb max_cmd_len+1 ; ontimeout
-Onerror resb max_cmd_len+1 ; onerror
-KbdMap resb 256 ; Keyboard map
-FKeyName resb 10*FILENAME_MAX ; File names for F-key help
-NumBuf resb 15 ; Buffer to load number
-NumBufEnd resb 1 ; Last byte in NumBuf
ISOFileName resb 64 ; ISO filename canonicalization buffer
ISOFileNameEnd equ $
- alignb 32
-KernelName resb FILENAME_MAX ; Mangled name for kernel
-KernelCName resb FILENAME_MAX ; Unmangled kernel name
-InitRDCName resb FILENAME_MAX ; Unmangled initrd name
-MNameBuf resb FILENAME_MAX
-InitRD resb FILENAME_MAX
-PartInfo resb 16 ; Partition table entry
-E820Buf resd 5 ; INT 15:E820 data buffer
-E820Mem resd 1 ; Memory detected by E820
-E820Max resd 1 ; Is E820 memory capped?
-HiLoadAddr resd 1 ; Address pointer for high load loop
-HighMemSize resd 1 ; End of memory pointer (bytes)
-RamdiskMax resd 1 ; Highest address for a ramdisk
-KernelSize resd 1 ; Size of kernel (bytes)
-SavedSSSP resd 1 ; Our SS:SP while running a COMBOOT image
-PMESP resd 1 ; Protected-mode ESP
-FSectors resd 1 ; Number of sectors in getc file
-RootDir resb dir_t_size ; Root directory
CurDir resb dir_t_size ; Current directory
-KernelSects resd 1 ; Kernel size in clusters
-InitStack resd 1 ; Initial stack pointer (SS:SP)
+RootDir resb dir_t_size ; Root directory
FirstSecSum resd 1 ; Checksum of bytes 64-2048
ImageDwords resd 1 ; isolinux.bin size, dwords
-FBytes equ $ ; Used by open/getc
-FBytes1 resw 1
-FBytes2 resw 1
-FNextClust resw 1 ; Pointer to next cluster in d:o
-FPtr resw 1 ; Pointer to next char in buffer
-CmdOptPtr resw 1 ; Pointer to first option on cmd line
-KernelCNameLen resw 1 ; Length of unmangled kernel name
-InitRDCNameLen resw 1 ; Length of unmangled initrd name
-NextCharJump resw 1 ; Routine to interpret next print char
-SetupSecs resw 1 ; Number of setup sectors
-A20Test resw 1 ; Counter for testing status of A20
-A20Type resw 1 ; A20 type
-CmdLineLen resw 1 ; Length of command line including null
-GraphXSize resw 1 ; Width of splash screen file
-VGAPos resw 1 ; Pointer into VGA memory
-VGACluster resw 1 ; Cluster pointer for VGA image file
-VGAFilePtr resw 1 ; Pointer into VGAFileBuf
-Com32SysSP resw 1 ; SP saved during COM32 syscall
-ConfigFile resw 1 ; Socket for config file
-PktTimeout resw 1 ; Timeout for current packet
-KernelExtPtr resw 1 ; During search, final null pointer
-LocalBootType resw 1 ; Local boot return code
-ImageSectors resw 1 ; isolinux.bin size, sectors
+InitStack resd 1 ; Initial stack pointer (SS:SP)
DiskSys resw 1 ; Last INT 13h call
-CursorDX equ $
-CursorCol resb 1 ; Cursor column for message file
-CursorRow resb 1 ; Cursor row for message file
-ScreenSize equ $
-VidCols resb 1 ; Columns on screen-1
-VidRows resb 1 ; Rows on screen-1
-BaudDivisor resw 1 ; Baud rate divisor
-FlowControl equ $
-FlowOutput resb 1 ; Outputs to assert for serial flow
-FlowInput resb 1 ; Input bits for serial flow
-FlowIgnore resb 1 ; Ignore input unless these bits set
-TextAttribute resb 1 ; Text attribute for message file
-RetryCount resb 1 ; Used for disk access retries
-KbdFlags resb 1 ; Check for keyboard escapes
-LoadFlags resb 1 ; Loadflags from kernel
-A20Tries resb 1 ; Times until giving up on A20
-FuncFlag resb 1 ; == 1 if <Ctrl-F> pressed
-DisplayMask resb 1 ; Display modes mask
-ISOFlags resb 1 ; Flags for ISO directory search
+ImageSectors resw 1 ; isolinux.bin size, sectors
DiskError resb 1 ; Error code for disk I/O
DriveNo resb 1 ; CD-ROM BIOS drive number
-TextColorReg resb 17 ; VGA color registers for text mode
-VGAFileBuf resb FILENAME_MAX ; Unmangled VGA image name
-VGAFileBufEnd equ $
-VGAFileMBuf resb FILENAME_MAX ; Mangled VGA image name
- alignb 4 ; For the good of REP MOVSD
-command_line resb max_cmd_len+2 ; Command line buffer
- alignb 4
-default_cmd resb max_cmd_len+1 ; "default" command line
+ISOFlags resb 1 ; Flags for ISO directory search
+RetryCount resb 1 ; Used for disk access retries
alignb open_file_t_size
Files resb MAX_OPEN*open_file_t_size
; Begin data section
; -----------------------------------------------------------------------------
+ section .data
+
boot_prompt db 'boot: ', 0
wipe_char db BS, ' ', BS, 0
err_notfound db 'Could not find kernel image: ',0
boot_image db 'BOOT_IMAGE='
boot_image_len equ $-boot_image
ldlinux_end equ $
-
-; VGA font buffer at the end of memory (so loading a font works even
-; in graphics mode.)
-vgafontbuf equ 0E000h
-
-; This is a compile-time assert that we didn't run out of space
-%ifndef DEPEND
-%if (ldlinux_end-bootsec+7C00h) > vgafontbuf
-%error "Out of memory, better reorganize something..."
-%endif
-%endif
getcbuf resb trackbufsize
; ends at 5000h
-VKernelBuf: resb vk_size ; "Current" vkernel
- alignb 4
-AppendBuf resb max_cmd_len+1 ; append=
-Ontimeout resb max_cmd_len+1 ; ontimeout
-Onerror resb max_cmd_len+1 ; onerror
-KbdMap resb 256 ; Keyboard map
-FKeyName resb 10*16 ; File names for F-key help
-NumBuf resb 15 ; Buffer to load number
-NumBufEnd resb 1 ; Last byte in NumBuf
alignb 8
; Expanded superblock
SuperInfo equ $
resq 16 ; The first 16 bytes expanded 8 times
-
FAT resd 1 ; Location of (first) FAT
RootDirArea resd 1 ; Location of root directory area
RootDir resd 1 ; Location of root directory proper
RootDirSize resd 1 ; Root dir size in sectors
TotalSectors resd 1 ; Total number of sectors
EndSector resd 1 ; Location of filesystem end
-
- alignb 4
-E820Buf resd 5 ; INT 15:E820 data buffer
-E820Mem resd 1 ; Memory detected by E820
-E820Max resd 1 ; Is E820 memory capped?
-HiLoadAddr resd 1 ; Address pointer for high load loop
-HighMemSize resd 1 ; End of memory pointer (bytes)
-RamdiskMax resd 1 ; Highest address for a ramdisk
-KernelSize resd 1 ; Size of kernel (bytes)
-SavedSSSP resd 1 ; Our SS:SP while running a COMBOOT image
-PMESP resd 1 ; Protected-mode ESP
-FSectors resd 1 ; Number of sectors in getc file
ClustSize resd 1 ; Bytes/cluster
ClustMask resd 1 ; Sectors/cluster - 1
-KernelName resb 12 ; Mangled name for kernel
- ; (note the spare byte after!)
-OrigKernelExt resd 1 ; Original kernel extension
-FBytes equ $ ; Used by open/getc
-FBytes1 resw 1
-FBytes2 resw 1
-DirBlocksLeft resw 1 ; Ditto
-RunLinClust resw 1 ; Cluster # for LDLINUX.SYS
-KernelSects resw 1 ; Kernel size in clusters
-FNextClust resw 1 ; Pointer to next cluster in d:o
-FPtr resw 1 ; Pointer to next char in buffer
-CmdOptPtr resw 1 ; Pointer to first option on cmd line
-KernelCNameLen resw 1 ; Length of unmangled kernel name
-InitRDCNameLen resw 1 ; Length of unmangled initrd name
-NextCharJump resw 1 ; Routine to interpret next print char
-SetupSecs resw 1 ; Number of setup sectors
-A20Test resw 1 ; Counter for testing status of A20
-A20Type resw 1 ; A20 type
-CmdLineLen resw 1 ; Length of command line including null
-GraphXSize resw 1 ; Width of splash screen file
-VGAPos resw 1 ; Pointer into VGA memory
-VGACluster resw 1 ; Cluster pointer for VGA image file
-VGAFilePtr resw 1 ; Pointer into VGAFileBuf
-Com32SysSP resw 1 ; SP saved during COM32 syscall
-DirScanCtr resw 1 ; OBSOLETE FIX THIS
-EndofDirSec resw 1 ; OBSOLETE FIX THIS
-CachePtrs times (65536/SECTOR_SIZE) resw 1
-NextCacheSlot resw 1
-CursorDX equ $
-CursorCol resb 1 ; Cursor column for message file
-CursorRow resb 1 ; Cursor row for message file
-ScreenSize equ $
-VidCols resb 1 ; Columns on screen-1
-VidRows resb 1 ; Rows on screen-1
-BaudDivisor resw 1 ; Baud rate divisor
-FlowControl equ $
-FlowOutput resb 1 ; Outputs to assert for serial flow
-FlowInput resb 1 ; Input bits for serial flow
-FlowIgnore resb 1 ; Ignore input unless these bits set
-TextAttribute resb 1 ; Text attribute for message file
-RetryCount resb 1 ; Used for disk access retries
-KbdFlags resb 1 ; Check for keyboard escapes
-LoadFlags resb 1 ; Loadflags from kernel
-A20Tries resb 1 ; Times until giving up on A20
-FuncFlag resb 1 ; Escape sequences received from keyboard
-DisplayMask resb 1 ; Display modes mask
+CachePtrs resw 65536/SECTOR_SIZE ; Cached sector pointers
+NextCacheSlot resw 1 ; Next cache slot to occupy
CopySuper resb 1 ; Distinguish .bs versus .bss
DriveNumber resb 1 ; BIOS drive number
ClustShift resb 1 ; Shift count for sectors/cluster
ClustByteShift resb 1 ; Shift count for bytes/cluster
-MNameBuf resb 11 ; Generic mangled file name buffer
-InitRD resb 11 ; initrd= mangled name
-KernelCName resb 13 ; Unmangled kernel name
-InitRDCName resb 13 ; Unmangled initrd name
-TextColorReg resb 17 ; VGA color registers for text mode
-VGAFileBuf resb 13 ; Unmangled VGA image name
-VGAFileBufEnd equ $
-VGAFileMBuf resb 11 ; Mangled VGA image name
- alignb 4 ; For the good of REP MOVSD
-command_line resb max_cmd_len+2 ; Command line buffer
- alignb 4
-default_cmd resb max_cmd_len+1 ; "default" command line
alignb open_file_t_size
Files resb MAX_OPEN*open_file_t_size
; Begin data section
; -----------------------------------------------------------------------------
+ section .data
;
; Lower-case table for codepage 865
;
align 4, db 0 ; Pad out any unfinished dword
ldlinux_end equ $
-ldlinux_len equ $-ldlinux_magic
-
-; VGA font buffer at the end of memory (so loading a font works even
-; in graphics mode.)
-vgafontbuf equ 0E000h
-
-; This is a compile-time assert that we didn't run out of space
-%ifndef DEPEND
-%if (ldlinux_end-bootsec+7C00h) > vgafontbuf
-%error "Out of memory, better reorganize something..."
-%endif
-%endif
;; Load a file into high memory
;;
+ section .text
+
;
; load_high: loads (the remainder of) a file into high memory.
; This routine prints dots for each 64K transferred, and
;; Command line parser code
;;
+ section .text
+
; -------------------------------------------------------------------------
; getcommand: Get a keyword from the current "getc" file and match it
; against a list of keywords (keywd_table). Each entry in
call getc
jc .eof
jmp short .skipline
+
+ section .bss
+ alignb 32
+VKernelBuf: resb vk_size ; "Current" vkernel
+AppendBuf resb max_cmd_len+1 ; append=
+Ontimeout resb max_cmd_len+1 ; ontimeout
+Onerror resb max_cmd_len+1 ; onerror
+KbdMap resb 256 ; Keyboard map
+FKeyName resb 10*FILENAME_MAX ; File names for F-key help
+KernelCNameLen resw 1 ; Length of unmangled kernel name
+InitRDCNameLen resw 1 ; Length of unmangled initrd name
+%if IS_SYSLINUX
+KernelName resb FILENAME_MAX+1 ; Mangled name for kernel
+KernelCName resb FILENAME_MAX+2 ; Unmangled kernel name
+InitRDCName resb FILENAME_MAX+2 ; Unmangled initrd name
+%else
+KernelName resb FILENAME_MAX ; Mangled name for kernel
+KernelCName resb FILENAME_MAX ; Unmangled kernel name
+InitRDCName resb FILENAME_MAX ; Unmangled initrd name
+%endif
+MNameBuf resb FILENAME_MAX
+InitRD resb FILENAME_MAX
;; Configuration file operations
;;
+ section .text
;
; "default" command
;
; writing a received ARP packet into low memory.
RBFB_brainfuck resb 800h
-VKernelBuf: resb vk_size ; "Current" vkernel
- alignb 4
-AppendBuf resb max_cmd_len+1 ; append=
-Ontimeout resb max_cmd_len+1 ; ontimeout
-Onerror resb max_cmd_len+1 ; onerror
-KbdMap resb 256 ; Keyboard map
-PathPrefix resb 256 ; Path prefix derived from the above
+ alignb FILENAME_MAX
BootFile resb 256 ; Boot file from DHCP packet
ConfigName resb 256 ; Configuration file from DHCP option
-FKeyName resb 10*FILENAME_MAX ; File names for F-key help
- alignb FILENAME_MAX
-KernelName resb FILENAME_MAX ; Mangled name for kernel
-KernelCName resb FILENAME_MAX ; Unmangled kernel name
-InitRDCName resb FILENAME_MAX ; Unmangled initrd name
-MNameBuf resb FILENAME_MAX
-InitRD resb FILENAME_MAX
-NumBuf resb 15 ; Buffer to load number
-NumBufEnd resb 1 ; Last byte in NumBuf
+PathPrefix resb 256 ; Path prefix derived from boot file
DotQuadBuf resb 16 ; Buffer for dotted-quad IP address
IPOption resb 80 ; ip= option buffer
-MACLen resb 1 ; MAC address len
-MACType resb 1 ; MAC address type
MAC resb 16 ; Actual MAC address
MACStr resb 3*17 ; MAC address as a string
-PartInfo resb 16 ; Partition table entry
-E820Buf resd 5 ; INT 15:E820 data buffer
-E820Mem resd 1 ; Memory detected by E820
-E820Max resd 1 ; Is E820 memory capped?
-HiLoadAddr resd 1 ; Address pointer for high load loop
-HighMemSize resd 1 ; End of memory pointer (bytes)
-RamdiskMax resd 1 ; Highest address for a ramdisk
-KernelSize resd 1 ; Size of kernel (bytes)
-SavedSSSP resd 1 ; Our SS:SP while running a COMBOOT image
-PMESP resd 1 ; Protected-mode ESP
-FSectors resd 1 ; Number of sectors in getc file
+ alignb 4
InitStack resd 1 ; Pointer to reset stack
RebootTime resd 1 ; Reboot timeout, if set by option
-KernelSects resd 1 ; Kernel size in clusters
StrucPtr resd 1 ; Pointer to PXENV+ or !PXE structure
-FBytes equ $ ; Used by open/getc
-FBytes1 resw 1
-FBytes2 resw 1
-FNextClust resw 1 ; Pointer to next cluster in d:o
-FPtr resw 1 ; Pointer to next char in buffer
-CmdOptPtr resw 1 ; Pointer to first option on cmd line
-KernelCNameLen resw 1 ; Length of unmangled kernel name
-InitRDCNameLen resw 1 ; Length of unmangled initrd name
-NextCharJump resw 1 ; Routine to interpret next print char
-SetupSecs resw 1 ; Number of setup sectors
-A20Test resw 1 ; Counter for testing status of A20
-A20Type resw 1 ; A20 type
-CmdLineLen resw 1 ; Length of command line including null
-GraphXSize resw 1 ; Width of splash screen file
-VGAPos resw 1 ; Pointer into VGA memory
-VGACluster resw 1 ; Cluster pointer for VGA image file
-VGAFilePtr resw 1 ; Pointer into VGAFileBuf
-Com32SysSP resw 1 ; SP saved during COM32 syscall
-ConfigFile resw 1 ; Socket for config file
-PktTimeout resw 1 ; Timeout for current packet
-KernelExtPtr resw 1 ; During search, final null pointer
+APIVer resw 1 ; PXE API version found
IPOptionLen resw 1 ; Length of IPOption
+IdleTimer resw 1 ; Time to check for ARP?
LocalBootType resw 1 ; Local boot return code
+PktTimeout resw 1 ; Timeout for current packet
RealBaseMem resw 1 ; Amount of DOS memory after freeing
-APIVer resw 1 ; PXE API version found
-IdleTimer resw 1 ; Time to check for ARP?
-CursorDX equ $
-CursorCol resb 1 ; Cursor column for message file
-CursorRow resb 1 ; Cursor row for message file
-ScreenSize equ $
-VidCols resb 1 ; Columns on screen-1
-VidRows resb 1 ; Rows on screen-1
-BaudDivisor resw 1 ; Baud rate divisor
-FlowControl equ $
-FlowOutput resb 1 ; Outputs to assert for serial flow
-FlowInput resb 1 ; Input bits for serial flow
-FlowIgnore resb 1 ; Ignore input unless these bits set
-TextAttribute resb 1 ; Text attribute for message file
-RetryCount resb 1 ; Used for disk access retries
-KbdFlags resb 1 ; Check for keyboard escapes
-LoadFlags resb 1 ; Loadflags from kernel
-A20Tries resb 1 ; Times until giving up on A20
-FuncFlag resb 1 ; == 1 if <Ctrl-F> pressed
-DisplayMask resb 1 ; Display modes mask
+MACLen resb 1 ; MAC address len
+MACType resb 1 ; MAC address type
OverLoad resb 1 ; Set if DHCP packet uses "overloading"
-TextColorReg resb 17 ; VGA color registers for text mode
-VGAFileBuf resb FILENAME_MAX ; Unmangled VGA image name
-VGAFileBufEnd equ $
-VGAFileMBuf resb FILENAME_MAX ; Mangled VGA image name
- alignb 4 ; For the good of REP MOVSD
-command_line resb max_cmd_len+2 ; Command line buffer
- alignb 4
-default_cmd resb max_cmd_len+1 ; "default" command line
;
; PXE packets which don't need static initialization
; Begin data section
; -----------------------------------------------------------------------------
+ section .data
+
hextbl_lower db '0123456789abcdef'
copyright_str db ' Copyright (C) 1994-', year, ' H. Peter Anvin'
db CR, LF, 0
boot_image db 'BOOT_IMAGE='
boot_image_len equ $-boot_image
ldlinux_end equ $
-
-; VGA font buffer at the end of memory (so loading a font works even
-; in graphics mode.)
-vgafontbuf equ 0E000h
-
-; This is a compile-time assert that we didn't run out of space
-%ifndef DEPEND
-%if (ldlinux_end-bootsec+7C00h) > vgafontbuf
-%error "Out of memory, better reorganize something..."
-%endif
-%endif
; su_ramdisklen - Size of file
; SI - initrd filehandle/cluster pointer
;
+ section .text
loadinitrd:
push es ; Save ES on entry
mov ax,real_mode_seg
call crlf
pop es ; Restore original ES
ret
+
+ section .bss
+ alignb 4
+RamdiskMax resd 1 ; Highest address for ramdisk
+KernelSize resd 1 ; Size of kernel in bytes
+KernelSects resd 1 ; Size of kernel in sectors
+CmdLineLen resw 1 ; Length of command line including null
+SetupSecs resw 1 ; Number of setup sectors
+LoadFlags resb 1 ; Loadflags from kernel
; strcpy: Copy DS:SI -> ES:DI up to and including a null byte;
; on exit SI and DI point to the byte *after* the null byte
;
+ section .text
+
strcpy: push ax
.loop: lodsb
stosb
%endif
; Otherwise Linux kernel
+ section .bss
+ alignb 2
+KernelExtPtr resw 1 ; During search, final null pointer
+CmdOptPtr resw 1 ; Pointer to first option on cmd line
+KbdFlags resb 1 ; Check for keyboard escapes
+FuncFlag resb 1 ; Escape sequences received from keyboard
+ alignb 4 ; For the good of REP MOVSD
+command_line resb max_cmd_len+2 ; Command line buffer
+ alignb 4
+default_cmd resb max_cmd_len+1 ; "default" command line
+
+ section .text
;; Code to write a simple string.
;;
+ section .text
;
; crlf: Print a newline
;
projects / profile / ivi / syslinux.git / commitdiff