forked from KolibriOS/kolibrios
461 lines
9.6 KiB
NASM
461 lines
9.6 KiB
NASM
|
;freebsd = 1 ;uncomment for FreeBSD-specific changes
|
||
|
|
|
||
|
|
format ELF64
|
||
|
|
public _start
|
||
|
|
.data? fix section ".bss" writeable align 4
|
||
|
|
.data fix section ".data" writeable align 4
|
||
|
|
.const fix section ".const" align 4
|
||
|
|
.code fix section ".text" executable align 16
|
||
|
|
offset fix
|
||
|
|
ptr fix
|
||
|
|
struc label type {
|
||
|
|
label . type }
|
||
|
|
|
||
|
|
extrn lzma_compress
|
||
|
|
extrn lzma_set_dict_size
|
||
|
|
|
||
|
|
.data?
|
||
|
|
infilename dq ?
|
||
|
|
outfilename dq ?
|
||
|
|
infile dq ?
|
||
|
|
outfile dq ?
|
||
|
|
inptr dq ?
|
||
|
|
workmem dq ?
|
||
|
|
insize dd ?
|
||
|
|
outsize dd ?
|
||
|
|
lzma_dictsize dd ?
|
||
|
|
indelta dd ?
|
||
|
|
strucstat rq 18
|
||
|
|
|
||
|
|
if defined freebsd
|
||
|
|
st_atime_offset = 24
|
||
|
|
st_mtime_offset = 40
|
||
|
|
st_birthtime_offset = 104
|
||
|
|
st_size_offset = 72
|
||
|
|
else
|
||
|
|
st_atime_offset = 72
|
||
|
|
st_mtime_offset = 88
|
||
|
|
;st_birthtime_offset not defined
|
||
|
|
st_size_offset = 48
|
||
|
|
end if
|
||
|
|
|
||
|
|
public environ
|
||
|
|
environ dq ?
|
||
|
|
public __progname
|
||
|
|
__progname dq ?
|
||
|
|
ct1 db 256 dup (?)
|
||
|
|
ctn dd ?
|
||
|
|
cti db ?
|
||
|
|
|
||
|
|
.const
|
||
|
|
usage_str db 'Written by diamond in 2006, 2007 specially for KolibriOS',13,10
|
||
|
|
db 'LZMA compression library is copyright (c) 1999-2005 by Igor Pavlov',13,10
|
||
|
|
db 13,10
|
||
|
|
db 'Usage: kerpack <infile> [<outfile>]',13,10
|
||
|
|
usage_len = $ - offset usage_str
|
||
|
|
errload_str db 'Cannot load input file',13,10
|
||
|
|
errload_len = $ - offset errload_str
|
||
|
|
outfileerr_str db 'Cannot save output file',13,10
|
||
|
|
outfileerr_len = $ - offset outfileerr_str
|
||
|
|
nomem_str db 'No memory',13,10
|
||
|
|
nomem_len = $ - offset nomem_str
|
||
|
|
too_big_str db 'failed, output is greater than input.',13,10
|
||
|
|
too_big_len = $ - too_big_str
|
||
|
|
compressing_str db 'Compressing ... '
|
||
|
|
compressing_len = $ - compressing_str
|
||
|
|
|
||
|
|
.data
|
||
|
|
done_str db 'OK! Compression ratio: '
|
||
|
|
ratio dw '00'
|
||
|
|
db '%',13,10,13,10
|
||
|
|
done_len = $ - done_str
|
||
|
|
|
||
|
|
use_lzma = 1
|
||
|
|
|
||
|
|
use_no_calltrick = 0
|
||
|
|
use_calltrick1 = 40h
|
||
|
|
use_calltrick2 = 80h
|
||
|
|
|
||
|
|
method db 1
|
||
|
|
|
||
|
|
.code
|
||
|
|
; Write string from [rsi] of rdx bytes.
|
||
|
|
write_string:
|
||
|
|
; 1. Align stack on 16 bytes.
|
||
|
|
push rdi
|
||
|
|
; 2. Set rdi to 1 = descriptor for stdout.
|
||
|
|
xor edi, edi
|
||
|
|
inc edi
|
||
|
|
; 3. Do system call.
|
||
|
|
call write
|
||
|
|
; 4. Restore stack and return.
|
||
|
|
pop rdi
|
||
|
|
ret
|
||
|
|
|
||
|
|
; Write string from [rsi] of rdx bytes and exit. Note that main code jumps (not calls) here,
|
||
|
|
; so we should not align the stack.
|
||
|
|
write_exit:
|
||
|
|
; 1. Call prev func.
|
||
|
|
call write_string
|
||
|
|
; 2. Do system call for exit.
|
||
|
|
; Note that this can be used as independent proc jumped (not called) to.
|
||
|
|
doexit:
|
||
|
|
xor edi, edi
|
||
|
|
inc edi
|
||
|
|
call exit
|
||
|
|
|
||
|
|
; Main procedure.
|
||
|
|
_start:
|
||
|
|
; 1. Parse command line.
|
||
|
|
; Linux: [rsp] = argc, rsp+8 = argv
|
||
|
|
; FreeBSD: [rdi] = argc, rdi+8 = argv
|
||
|
|
; 1a. Load argc and argv to registers,
|
||
|
|
; skip first argument (which is always program name)
|
||
|
|
if defined freebsd
|
||
|
|
mov ecx, [rdi] ; ecx = argc
|
||
|
|
add rdi, 16 ; rdi = &argv[1]
|
||
|
|
else
|
||
|
|
mov ecx, [rsp] ; ecx = argc
|
||
|
|
lea rdi, [rsp+16] ; rdi = &argv[1]
|
||
|
|
end if
|
||
|
|
; 1b. Test for first filename parameter. If no, goto step 2.
|
||
|
|
call get_file_name
|
||
|
|
jz usage
|
||
|
|
; 1c. We got input file name, save it.
|
||
|
|
; Assume that output file name is the same; if no, we will rewrite it in step 1d.
|
||
|
|
mov [infilename], rax
|
||
|
|
mov [outfilename], rax
|
||
|
|
; 1d. Test for second filename parameter. If yes, rewrite assumption in step 1c and check that there are no 3rd parameter.
|
||
|
|
call get_file_name
|
||
|
|
jz @f
|
||
|
|
mov [outfilename], rax
|
||
|
|
call get_file_name
|
||
|
|
jnz usage
|
||
|
|
@@:
|
||
|
|
; 1e. Parsing is done, process to step 3.
|
||
|
|
jmp short cont
|
||
|
|
; 2. No arguments or too many arguments given; write message and exit.
|
||
|
|
usage:
|
||
|
|
push usage_len
|
||
|
|
pop rdx
|
||
|
|
mov rsi, offset usage_str
|
||
|
|
jmp write_exit
|
||
|
|
cont:
|
||
|
|
; 4. Load the input file.
|
||
|
|
; 4a. Do system call for stat - get file times and file size.
|
||
|
|
mov rdi, [infilename]
|
||
|
|
mov rsi, offset strucstat
|
||
|
|
mov r13, rsi
|
||
|
|
call stat
|
||
|
|
; 4b. Test result; if not 0 (0 is OK), goto 4e.
|
||
|
|
test rax, rax
|
||
|
|
jnz short infileerr
|
||
|
|
; 4c. Do system call for open.
|
||
|
|
mov rdi, [infilename]
|
||
|
|
mov rsi, offset open_mode
|
||
|
|
call fopen
|
||
|
|
; 4d. Test result; if not NULL, goto 4f.
|
||
|
|
test rax, rax
|
||
|
|
jnz short inopened
|
||
|
|
infileerr:
|
||
|
|
; 4e. Say error and abort.
|
||
|
|
push errload_len
|
||
|
|
pop rdx
|
||
|
|
mov rsi, offset errload_str
|
||
|
|
jmp write_exit
|
||
|
|
inopened:
|
||
|
|
mov r12, rax
|
||
|
|
; 4f. Check that the size is nonzero and less than 4G.
|
||
|
|
mov edi, [r13+st_size_offset]
|
||
|
|
test edi, edi
|
||
|
|
jz short infileerr
|
||
|
|
cmp dword [r13+st_size_offset+4], 0
|
||
|
|
jnz short infileerr
|
||
|
|
; 4g. Allocate memory for the input file.
|
||
|
|
mov [insize], edi
|
||
|
|
call malloc
|
||
|
|
test rax, rax
|
||
|
|
jz nomem
|
||
|
|
mov [infile], rax
|
||
|
|
; 4g. Read the input file to the allocated memory.
|
||
|
|
mov rdi, rax
|
||
|
|
push 1
|
||
|
|
pop rsi
|
||
|
|
mov edx, [r13+st_size_offset]
|
||
|
|
mov rcx, r12
|
||
|
|
call fread
|
||
|
|
; 4h. Test result; must be equal to file size.
|
||
|
|
cmp eax, [r13+st_size_offset]
|
||
|
|
jnz infileerr
|
||
|
|
; 4i. Close the input file.
|
||
|
|
mov rdi, r12
|
||
|
|
call fclose
|
||
|
|
; 5. Calculate maximum size of the output.
|
||
|
|
mov edi, [insize]
|
||
|
|
shr edi, 3
|
||
|
|
add edi, [insize]
|
||
|
|
add edi, 400h ; should be enough for header
|
||
|
|
mov r12d, edi
|
||
|
|
; 6. Allocate memory for two copies of maximum output.
|
||
|
|
; 6a. Do system call.
|
||
|
|
call malloc
|
||
|
|
; 6b. Test return value. If ok, goto 6d.
|
||
|
|
test rax, rax
|
||
|
|
jnz short outmemok
|
||
|
|
; 6c. No memory; say error and exit.
|
||
|
|
nomem:
|
||
|
|
push nomem_len
|
||
|
|
pop rdx
|
||
|
|
mov rsi, offset nomem_str
|
||
|
|
jmp write_exit
|
||
|
|
; 6d. Remember allocated memory address.
|
||
|
|
outmemok:
|
||
|
|
mov [outfile], rax
|
||
|
|
; 8. Determine and set lzma_dict_size.
|
||
|
|
push 18h
|
||
|
|
pop rdi
|
||
|
|
call lzma_set_dict_size
|
||
|
|
; 9. Allocate lzma_workmem.
|
||
|
|
mov edi, (1 shl 18h) * 19 / 2 + 509000h
|
||
|
|
call malloc
|
||
|
|
test rax, rax
|
||
|
|
jz nomem
|
||
|
|
mov [workmem], rax
|
||
|
|
; 10. Say another 'hi'.
|
||
|
|
push compressing_len
|
||
|
|
pop rdx
|
||
|
|
mov rsi, offset compressing_str
|
||
|
|
call write_string
|
||
|
|
; 11. Do work.
|
||
|
|
; find jump to 32-bit code
|
||
|
|
mov rdi, [infile]
|
||
|
|
dec rdi
|
||
|
|
@@:
|
||
|
|
inc rdi
|
||
|
|
cmp dword [rdi], 0E88EE08Eh ; mov fs,ax/mov gs,ax
|
||
|
|
jnz @b
|
||
|
|
cmp dword [rdi+4], 00BCD08Eh ; mov ss,ax/mov esp,00xxxxxx
|
||
|
|
jnz @b
|
||
|
|
add rdi, 11
|
||
|
|
mov [inptr], rdi
|
||
|
|
sub rdi, [infile]
|
||
|
|
mov [indelta], edi
|
||
|
|
mov eax, [insize]
|
||
|
|
mov ebx, eax
|
||
|
|
add eax, 0x10000
|
||
|
|
mov [loader_base+..loader_patch3+2], eax
|
||
|
|
sub ebx, edi
|
||
|
|
mov [insize], ebx
|
||
|
|
call preprocess_calltrick2
|
||
|
|
mov al, [cti]
|
||
|
|
mov [loader_base+loader_patch5-1], al
|
||
|
|
mov eax, [ctn]
|
||
|
|
mov [loader_base+loader_patch4+1], eax
|
||
|
|
mov esi, [indelta]
|
||
|
|
add rsi, [outfile]
|
||
|
|
add rsi, loader_size - 5
|
||
|
|
mov rdi, [inptr]
|
||
|
|
mov edx, [insize]
|
||
|
|
mov rcx, [workmem]
|
||
|
|
call lzma_compress
|
||
|
|
mov edx, [indelta]
|
||
|
|
add eax, loader_size-5
|
||
|
|
mov [loader_base+loader_patch1+6], eax
|
||
|
|
add eax, edx
|
||
|
|
mov [outsize], eax
|
||
|
|
mov eax, edx
|
||
|
|
add rax, [outfile]
|
||
|
|
mov ecx, [rax + loader_size - 4]
|
||
|
|
bswap ecx
|
||
|
|
mov [loader_base+loader_patch2+4], ecx
|
||
|
|
add edx, 0x10000
|
||
|
|
mov [loader_base+loader_patch1+1], edx
|
||
|
|
mov rsi, [infile]
|
||
|
|
mov rdi, [outfile]
|
||
|
|
mov ecx, [indelta]
|
||
|
|
rep movsb
|
||
|
|
mov rsi, loader_base
|
||
|
|
mov ecx, loader_size
|
||
|
|
rep movsb
|
||
|
|
mov eax, [outsize]
|
||
|
|
cmp eax, [insize]
|
||
|
|
jb short packed_ok
|
||
|
|
push too_big_len
|
||
|
|
pop rdx
|
||
|
|
mov rsi, offset too_big_str
|
||
|
|
jmp write_exit
|
||
|
|
packed_ok:
|
||
|
|
; 12. Main work is done. Free lzma_workmem.
|
||
|
|
mov rdi, [workmem]
|
||
|
|
call free
|
||
|
|
; 13. Set header
|
||
|
|
mov eax, [outsize]
|
||
|
|
mov ecx, 100
|
||
|
|
mul ecx
|
||
|
|
div [insize]
|
||
|
|
mov cl, 10
|
||
|
|
div cl
|
||
|
|
add ax, '00'
|
||
|
|
mov [ratio], ax
|
||
|
|
push done_len
|
||
|
|
pop rdx
|
||
|
|
mov rsi, offset done_str
|
||
|
|
call write_string
|
||
|
|
; 14. Save the output file.
|
||
|
|
; 14a. Do system call for open.
|
||
|
|
mov rdi, [outfilename]
|
||
|
|
mov rsi, create_mode
|
||
|
|
call fopen
|
||
|
|
; 14b. Test for success; if yes, goto 14d.
|
||
|
|
test rax, rax
|
||
|
|
jnz short @f
|
||
|
|
; 14c. Say error and exit.
|
||
|
|
outerr:
|
||
|
|
push outfileerr_len
|
||
|
|
pop rdx
|
||
|
|
mov rsi, offset outfileerr_str
|
||
|
|
jmp write_exit
|
||
|
|
; 14d. Do system call for write.
|
||
|
|
@@:
|
||
|
|
mov r12, rax
|
||
|
|
mov rdi, [outfile]
|
||
|
|
mov esi, [outsize]
|
||
|
|
push 1
|
||
|
|
pop rdx
|
||
|
|
mov rcx, r12
|
||
|
|
call fwrite
|
||
|
|
test eax, eax
|
||
|
|
jz short outerr
|
||
|
|
; 14e. Close output file.
|
||
|
|
mov rdi, r12
|
||
|
|
call fclose
|
||
|
|
; 15. Exit.
|
||
|
|
xor edi, edi
|
||
|
|
call exit
|
||
|
|
|
||
|
|
; Scan command line, skipping possible options, and return first non-option
|
||
|
|
; ecx is number of arguments left, rdi points to first new argument (updated by func)
|
||
|
|
; After the call: ZF set if no arguments left, otherwise rax points to the arg.
|
||
|
|
get_file_name:
|
||
|
|
; 1. Test whether there are still arguments. If no, goto 5; note ZF is set.
|
||
|
|
dec ecx
|
||
|
|
jz @@end
|
||
|
|
; 2. Get the new arg, advance rdi (ecx was decreased in step 1).
|
||
|
|
mov rax, [rdi]
|
||
|
|
add rdi, 8
|
||
|
|
; 5. No arguments (ZF set) or normal argument (ZF cleared); return.
|
||
|
|
@@end:
|
||
|
|
ret
|
||
|
|
|
||
|
|
pack_calltrick_fail:
|
||
|
|
xor eax, eax
|
||
|
|
xor ebx, ebx
|
||
|
|
mov [ctn], eax
|
||
|
|
ret
|
||
|
|
|
||
|
|
preprocess_calltrick2:
|
||
|
|
; restore input
|
||
|
|
mov rsi, [infile]
|
||
|
|
; input preprocessing
|
||
|
|
push rax
|
||
|
|
mov edi, [insize]
|
||
|
|
add edi, edi
|
||
|
|
call malloc
|
||
|
|
pop rcx
|
||
|
|
test rax, rax
|
||
|
|
jz pack_calltrick_fail
|
||
|
|
mov rdi, offset ct1
|
||
|
|
xchg rax, rbx
|
||
|
|
xor eax, eax
|
||
|
|
push rdi
|
||
|
|
mov ecx, 256/4
|
||
|
|
rep stosd
|
||
|
|
pop rdi
|
||
|
|
mov ecx, [insize]
|
||
|
|
mov rsi, [inptr]
|
||
|
|
xchg eax, edx
|
||
|
|
push rbx
|
||
|
|
input_pre2:
|
||
|
|
lodsb
|
||
|
|
@@:
|
||
|
|
cmp al, 0Fh
|
||
|
|
jnz short ip1
|
||
|
|
dec ecx
|
||
|
|
jz short input_pre_done2
|
||
|
|
lodsb
|
||
|
|
cmp al, 80h
|
||
|
|
jb short @b
|
||
|
|
cmp al, 90h
|
||
|
|
jb short @f
|
||
|
|
ip1:
|
||
|
|
sub al, 0E8h
|
||
|
|
cmp al, 1
|
||
|
|
ja short input_pre_cont2
|
||
|
|
@@:
|
||
|
|
cmp ecx, 5
|
||
|
|
jb short input_pre_done2
|
||
|
|
lodsd
|
||
|
|
add eax, esi
|
||
|
|
sub eax, dword ptr [inptr]
|
||
|
|
cmp eax, [insize]
|
||
|
|
jae short xxx2
|
||
|
|
cmp eax, 1000000h
|
||
|
|
jae short xxx2
|
||
|
|
sub ecx, 4
|
||
|
|
bswap eax
|
||
|
|
mov [rsi-4], eax
|
||
|
|
inc edx
|
||
|
|
mov [rbx], rsi
|
||
|
|
add rbx, 8
|
||
|
|
jmp short input_pre_cont2
|
||
|
|
xxx2: sub rsi, 4
|
||
|
|
movzx eax, byte ptr [rsi]
|
||
|
|
mov byte ptr [rax+rdi], 1
|
||
|
|
input_pre_cont2:
|
||
|
|
loop input_pre2
|
||
|
|
input_pre_done2:
|
||
|
|
mov [ctn], edx
|
||
|
|
pop rdx
|
||
|
|
xor eax, eax
|
||
|
|
mov ecx, 256
|
||
|
|
repnz scasb
|
||
|
|
jnz pack_calltrick_fail
|
||
|
|
not cl
|
||
|
|
mov [cti], cl
|
||
|
|
@@:
|
||
|
|
cmp rbx, rdx
|
||
|
|
jz @f
|
||
|
|
sub rbx, 8
|
||
|
|
mov rax, [rbx]
|
||
|
|
mov [rax-4], cl
|
||
|
|
jmp @b
|
||
|
|
@@:
|
||
|
|
push rax
|
||
|
|
mov rdi, rbx
|
||
|
|
call free
|
||
|
|
pop rax
|
||
|
|
ret
|
||
|
|
|
||
|
|
extrn exit
|
||
|
|
extrn fopen
|
||
|
|
extrn fread
|
||
|
|
extrn fwrite
|
||
|
|
extrn fclose
|
||
|
|
extrn fseek
|
||
|
|
extrn ftell
|
||
|
|
extrn malloc
|
||
|
|
extrn free
|
||
|
|
extrn write
|
||
|
|
extrn utimes
|
||
|
|
extrn stat
|
||
|
|
|
||
|
|
open_mode db "rb",0
|
||
|
|
create_mode db "wb",0
|
||
|
|
|
||
|
|
.data
|
||
|
|
|
||
|
|
loader_base:
|
||
|
|
use32
|
||
|
|
org 0
|
||
|
|
include 'loader_lzma.asm'
|