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Administrator
Magisk
Commits
9f91c8b5
Commit
9f91c8b5
authored
Mar 02, 2017
by
topjohnwu
Browse files
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Improvements
parent
2b3b087c
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Side-by-side
Showing
5 changed files
with
158 additions
and
122 deletions
+158
-122
compress.c
jni/magiskboot/compress.c
+54
-0
magiskboot.h
jni/magiskboot/magiskboot.h
+5
-1
parseimg.c
jni/magiskboot/parseimg.c
+73
-48
repack.c
jni/magiskboot/repack.c
+13
-42
unpack.c
jni/magiskboot/unpack.c
+13
-31
No files found.
jni/magiskboot/compress.c
View file @
9f91c8b5
...
...
@@ -341,3 +341,57 @@ void bzip2(int mode, const char* filename, unsigned char* buf, size_t size) {
}
close
(
fd
);
}
int
decomp
(
file_t
type
,
const
char
*
to
,
unsigned
char
*
from
,
size_t
size
)
{
switch
(
type
)
{
case
GZIP
:
gzip
(
0
,
to
,
from
,
size
);
break
;
case
XZ
:
lzma
(
0
,
to
,
from
,
size
);
break
;
case
LZMA
:
lzma
(
0
,
to
,
from
,
size
);
break
;
case
BZIP2
:
bzip2
(
0
,
to
,
from
,
size
);
break
;
case
LZ4
:
lz4
(
0
,
to
,
from
,
size
);
break
;
default:
// Unsupported
return
1
;
}
return
0
;
}
int
comp
(
file_t
type
,
const
char
*
to
,
unsigned
char
*
from
,
size_t
size
)
{
char
name
[
PATH_MAX
];
switch
(
type
)
{
case
GZIP
:
sprintf
(
name
,
"%s.%s"
,
to
,
"gz"
);
gzip
(
1
,
name
,
from
,
size
);
break
;
case
XZ
:
sprintf
(
name
,
"%s.%s"
,
to
,
"xz"
);
lzma
(
1
,
name
,
from
,
size
);
break
;
case
LZMA
:
sprintf
(
name
,
"%s.%s"
,
to
,
"lzma"
);
lzma
(
2
,
name
,
from
,
size
);
break
;
case
BZIP2
:
sprintf
(
name
,
"%s.%s"
,
to
,
"bz2"
);
bzip2
(
1
,
name
,
from
,
size
);
break
;
case
LZ4
:
sprintf
(
name
,
"%s.%s"
,
to
,
"lz4"
);
lz4
(
1
,
name
,
from
,
size
);
break
;
default:
// Unsupported
return
1
;
}
return
0
;
}
jni/magiskboot/magiskboot.h
View file @
9f91c8b5
...
...
@@ -30,7 +30,7 @@
#define DTB_FILE "dtb"
typedef
enum
{
DONTCARE
,
UNKNOWN
,
CHROMEOS
,
AOSP
,
ELF
,
...
...
@@ -40,6 +40,7 @@ typedef enum {
LZMA
,
BZIP2
,
LZ4
,
MTK
,
QCDT
,
}
file_t
;
...
...
@@ -55,11 +56,14 @@ void repack(const char *image);
void
hexpatch
(
char
*
image
,
char
*
from
,
char
*
to
);
void
error
(
int
rc
,
const
char
*
msg
,
...);
void
parse_img
(
unsigned
char
*
orig
,
size_t
size
);
file_t
check_type
(
unsigned
char
*
buf
);
// Compressions
void
gzip
(
int
mode
,
const
char
*
filename
,
unsigned
char
*
buf
,
size_t
size
);
void
lzma
(
int
mode
,
const
char
*
filename
,
unsigned
char
*
buf
,
size_t
size
);
void
lz4
(
int
mode
,
const
char
*
filename
,
unsigned
char
*
buf
,
size_t
size
);
void
bzip2
(
int
mode
,
const
char
*
filename
,
unsigned
char
*
buf
,
size_t
size
);
int
comp
(
file_t
type
,
const
char
*
to
,
unsigned
char
*
from
,
size_t
size
);
int
decomp
(
file_t
type
,
const
char
*
to
,
unsigned
char
*
from
,
size_t
size
);
#endif
jni/magiskboot/parseimg.c
View file @
9f91c8b5
...
...
@@ -13,6 +13,37 @@ boot_img_hdr hdr;
int
mtk_kernel
=
0
,
mtk_ramdisk
=
0
;
file_t
boot_type
,
ramdisk_type
,
dtb_type
;
file_t
check_type
(
unsigned
char
*
buf
)
{
if
(
memcmp
(
buf
,
CHROMEOS_MAGIC
,
CHROMEOS_MAGIC_SIZE
)
==
0
)
{
return
CHROMEOS
;
}
else
if
(
memcmp
(
buf
,
BOOT_MAGIC
,
BOOT_MAGIC_SIZE
)
==
0
)
{
return
AOSP
;
}
else
if
(
memcmp
(
buf
,
ELF_MAGIC
,
ELF_MAGIC_SIZE
)
==
0
)
{
return
ELF
;
}
else
if
(
memcmp
(
buf
,
"
\x1f\x8b\x08\x00
"
,
4
)
==
0
)
{
return
GZIP
;
}
else
if
(
memcmp
(
buf
,
"
\x89\x4c\x5a\x4f\x00\x0d\x0a\x1a\x0a
"
,
9
)
==
0
)
{
return
LZOP
;
}
else
if
(
memcmp
(
buf
,
"
\xfd
""7zXZ
\x00
"
,
6
)
==
0
)
{
return
XZ
;
}
else
if
(
memcmp
(
buf
,
"
\x5d\x00\x00
"
,
3
)
==
0
&&
(
buf
[
12
]
==
(
unsigned
char
)
'\xff'
||
buf
[
12
]
==
(
unsigned
char
)
'\x00'
))
{
return
LZMA
;
}
else
if
(
memcmp
(
buf
,
"BZh"
,
3
)
==
0
)
{
return
BZIP2
;
}
else
if
(
(
memcmp
(
buf
,
"
\x04\x22\x4d\x18
"
,
4
)
==
0
||
memcmp
(
buf
,
"
\x03\x21\x4c\x18
"
,
4
)
==
0
)
||
memcmp
(
buf
,
"
\x02\x21\x4c\x18
"
,
4
)
==
0
)
{
return
LZ4
;
}
else
if
(
memcmp
(
buf
,
"
\x88\x16\x88\x58
"
,
4
)
==
0
)
{
return
MTK
;
}
else
if
(
memcmp
(
buf
,
"QCDT"
,
4
)
==
0
)
{
return
QCDT
;
}
else
{
return
UNKNOWN
;
}
}
static
void
check_headers
()
{
printf
(
"KERNEL [%d] @ 0x%08x
\n
"
,
hdr
.
kernel_size
,
hdr
.
kernel_addr
);
printf
(
"RAMDISK [%d] @ 0x%08x
\n
"
,
hdr
.
ramdisk_size
,
hdr
.
ramdisk_addr
);
...
...
@@ -37,56 +68,44 @@ static void check_headers() {
printf
(
"NAME [%s]
\n
"
,
hdr
.
name
);
printf
(
"CMDLINE [%s]
\n
"
,
hdr
.
cmdline
);
// Check compression
if
(
memcmp
(
ramdisk
,
"
\x1f\x8b\x08\x00
"
,
4
)
==
0
)
{
// gzip header
printf
(
"COMPRESSION [gzip]
\n
"
);
ramdisk_type
=
GZIP
;
}
else
if
(
memcmp
(
ramdisk
,
"
\x89\x4c\x5a\x4f\x00\x0d\x0a\x1a\x0a
"
,
9
)
==
0
)
{
// lzop header
printf
(
"COMPRESSION [lzop]
\n
"
);
ramdisk_type
=
LZOP
;
}
else
if
(
memcmp
(
ramdisk
,
"
\xfd
""7zXZ
\x00
"
,
6
)
==
0
)
{
// xz header
printf
(
"COMPRESSION [xz]
\n
"
);
ramdisk_type
=
XZ
;
}
else
if
(
memcmp
(
ramdisk
,
"
\x5d\x00\x00
"
,
3
)
==
0
&&
(
ramdisk
[
12
]
==
(
unsigned
char
)
'\xff'
||
ramdisk
[
12
]
==
(
unsigned
char
)
'\x00'
))
{
// lzma header
printf
(
"COMPRESSION [lzma]
\n
"
);
ramdisk_type
=
LZMA
;
}
else
if
(
memcmp
(
ramdisk
,
"BZh"
,
3
)
==
0
)
{
// bzip2 header
printf
(
"COMPRESSION [bzip2]
\n
"
);
ramdisk_type
=
BZIP2
;
}
else
if
(
(
memcmp
(
ramdisk
,
"
\x04\x22\x4d\x18
"
,
4
)
==
0
||
memcmp
(
ramdisk
,
"
\x03\x21\x4c\x18
"
,
4
)
==
0
)
||
memcmp
(
ramdisk
,
"
\x02\x21\x4c\x18
"
,
4
)
==
0
)
{
// lz4 header
printf
(
"COMPRESSION [lz4]
\n
"
);
ramdisk_type
=
LZ4
;
ramdisk_type
=
check_type
(
ramdisk
);
}
else
{
error
(
1
,
"Unknown ramdisk format!"
);
switch
(
ramdisk_type
)
{
case
GZIP
:
printf
(
"COMPRESSION [%s]
\n
"
,
"gzip"
);
break
;
case
LZOP
:
printf
(
"COMPRESSION [%s]
\n
"
,
"lzop"
);
break
;
case
XZ
:
printf
(
"COMPRESSION [%s]
\n
"
,
"xz"
);
break
;
case
LZMA
:
printf
(
"COMPRESSION [%s]
\n
"
,
"lzma"
);
break
;
case
BZIP2
:
printf
(
"COMPRESSION [%s]
\n
"
,
"bzip2"
);
break
;
case
LZ4
:
printf
(
"COMPRESSION [%s]
\n
"
,
"lz4"
);
break
;
default:
error
(
1
,
"Unknown ramdisk format!"
);
}
// Check MTK
if
(
memcmp
(
kernel
,
"
\x88\x16\x88\x58
"
,
4
)
==
0
)
{
if
(
check_type
(
kernel
)
==
MTK
)
{
printf
(
"MTK header found in kernel
\n
"
);
mtk_kernel
=
1
;
}
if
(
memcmp
(
ramdisk
,
"
\x88\x16\x88\x58
"
,
4
)
==
0
)
{
if
(
check_type
(
ramdisk
)
==
MTK
)
{
printf
(
"MTK header found in ramdisk
\n
"
);
mtk_ramdisk
=
1
;
}
// Check dtb
// Check dtb
if ELF boot
if
(
boot_type
==
ELF
&&
hdr
.
dt_size
)
{
if
(
memcmp
(
dtb
,
"QCDT"
,
4
)
==
0
)
{
dtb_type
=
QCDT
;
}
else
if
(
memcmp
(
dtb
,
ELF_MAGIC
,
ELF_MAGIC_SIZE
)
==
0
)
{
dtb_type
=
ELF
;
}
dtb_type
=
check_type
(
dtb
);
}
}
...
...
@@ -292,16 +311,22 @@ static void parse_aosp() {
void
parse_img
(
unsigned
char
*
orig
,
size_t
size
)
{
for
(
base
=
orig
;
base
<
(
orig
+
size
);
base
+=
256
)
{
if
(
memcmp
(
base
,
CHROMEOS_MAGIC
,
CHROMEOS_MAGIC_SIZE
)
==
0
)
{
boot_type
=
CHROMEOS
;
}
else
if
(
memcmp
(
base
,
BOOT_MAGIC
,
BOOT_MAGIC_SIZE
)
==
0
)
{
if
(
boot_type
!=
CHROMEOS
)
boot_type
=
AOSP
;
parse_aosp
();
return
;
}
else
if
(
memcmp
(
base
,
ELF_MAGIC
,
ELF_MAGIC_SIZE
)
==
0
)
{
boot_type
=
ELF
;
parse_elf
();
return
;
switch
(
check_type
(
base
))
{
case
CHROMEOS
:
boot_type
=
CHROMEOS
;
continue
;
case
AOSP
:
// Don't override CHROMEOS
if
(
boot_type
!=
CHROMEOS
)
boot_type
=
AOSP
;
parse_aosp
();
return
;
case
ELF
:
boot_type
=
ELF
;
parse_elf
();
return
;
default:
continue
;
}
}
error
(
1
,
"No boot image magic found!"
);
...
...
jni/magiskboot/repack.c
View file @
9f91c8b5
...
...
@@ -82,7 +82,7 @@ void repack(const char* image) {
}
if
(
access
(
RAMDISK_FILE
,
R_OK
)
==
0
)
{
// If we found raw cpio,
re
compress to original format
// If we found raw cpio, compress to original format
int
rfd
=
open
(
RAMDISK_FILE
,
O_RDONLY
);
if
(
rfd
<
0
)
error
(
1
,
"Cannot open "
RAMDISK_FILE
);
...
...
@@ -91,52 +91,23 @@ void repack(const char* image) {
lseek
(
rfd
,
0
,
SEEK_SET
);
unsigned
char
*
cpio
=
mmap
(
NULL
,
cpio_size
,
PROT_READ
,
MAP_SHARED
,
rfd
,
0
);
switch
(
ramdisk_type
)
{
case
GZIP
:
sprintf
(
name
,
"%s.%s"
,
RAMDISK_FILE
,
"gz"
);
gzip
(
1
,
name
,
cpio
,
cpio_size
);
break
;
case
LZOP
:
sprintf
(
name
,
"%s.%s"
,
RAMDISK_FILE
,
"lzo"
);
error
(
1
,
"Unsupported format! Please compress manually!"
);
break
;
case
XZ
:
sprintf
(
name
,
"%s.%s"
,
RAMDISK_FILE
,
"xz"
);
lzma
(
1
,
name
,
cpio
,
cpio_size
);
break
;
case
LZMA
:
sprintf
(
name
,
"%s.%s"
,
RAMDISK_FILE
,
"lzma"
);
lzma
(
2
,
name
,
cpio
,
cpio_size
);
break
;
case
BZIP2
:
sprintf
(
name
,
"%s.%s"
,
RAMDISK_FILE
,
"bz2"
);
bzip2
(
1
,
name
,
cpio
,
cpio_size
);
break
;
case
LZ4
:
sprintf
(
name
,
"%s.%s"
,
RAMDISK_FILE
,
"lz4"
);
lz4
(
1
,
name
,
cpio
,
cpio_size
);
break
;
default:
// Never happens
break
;
}
if
(
comp
(
ramdisk_type
,
RAMDISK_FILE
,
cpio
,
cpio_size
))
error
(
1
,
"Unsupported format! Please compress manually!
\n
"
);
munmap
(
cpio
,
cpio_size
);
close
(
rfd
);
}
else
{
// If no raw cpio found, find compressed ones
int
found
=
0
;
for
(
int
i
=
0
;
i
<
EXT_NUM
;
++
i
)
{
sprintf
(
name
,
"%s.%s"
,
RAMDISK_FILE
,
ext_list
[
i
]);
if
(
access
(
name
,
R_OK
)
==
0
)
{
found
=
1
;
break
;
}
}
if
(
!
found
)
{
error
(
1
,
"No ramdisk exists!"
);
}
int
found
=
0
;
for
(
int
i
=
0
;
i
<
EXT_NUM
;
++
i
)
{
sprintf
(
name
,
"%s.%s"
,
RAMDISK_FILE
,
ext_list
[
i
]);
if
(
access
(
name
,
R_OK
)
==
0
)
{
found
=
1
;
break
;
}
}
if
(
!
found
)
error
(
1
,
"No ramdisk exists!"
);
hdr
.
ramdisk_size
+=
restore
(
name
);
page_align
();
...
...
jni/magiskboot/unpack.c
View file @
9f91c8b5
...
...
@@ -41,36 +41,18 @@ void unpack(const char* image) {
hdr
.
ramdisk_size
-=
512
;
}
switch
(
ramdisk_type
)
{
case
GZIP
:
sprintf
(
name
,
"%s.%s"
,
RAMDISK_FILE
,
"gz"
);
gzip
(
0
,
RAMDISK_FILE
,
ramdisk
,
hdr
.
ramdisk_size
);
break
;
case
LZOP
:
sprintf
(
name
,
"%s.%s"
,
RAMDISK_FILE
,
"lzo"
);
printf
(
"Unsupported format! Please decompress manually!
\n
"
);
// Dump the compressed ramdisk
dump
(
ramdisk
,
hdr
.
ramdisk_size
,
name
);
break
;
case
XZ
:
sprintf
(
name
,
"%s.%s"
,
RAMDISK_FILE
,
"xz"
);
lzma
(
0
,
RAMDISK_FILE
,
ramdisk
,
hdr
.
ramdisk_size
);
break
;
case
LZMA
:
sprintf
(
name
,
"%s.%s"
,
RAMDISK_FILE
,
"lzma"
);
lzma
(
0
,
RAMDISK_FILE
,
ramdisk
,
hdr
.
ramdisk_size
);
break
;
case
BZIP2
:
sprintf
(
name
,
"%s.%s"
,
RAMDISK_FILE
,
"bz2"
);
bzip2
(
0
,
RAMDISK_FILE
,
ramdisk
,
hdr
.
ramdisk_size
);
break
;
case
LZ4
:
sprintf
(
name
,
"%s.%s"
,
RAMDISK_FILE
,
"lz4"
);
lz4
(
0
,
RAMDISK_FILE
,
ramdisk
,
hdr
.
ramdisk_size
);
break
;
default:
// Never happens
break
;
if
(
decomp
(
ramdisk_type
,
RAMDISK_FILE
,
ramdisk
,
hdr
.
ramdisk_size
))
{
printf
(
"Unsupported format! Please decompress manually!
\n
"
);
switch
(
ramdisk_type
)
{
case
LZOP
:
sprintf
(
name
,
"%s.%s"
,
RAMDISK_FILE
,
"lzo"
);
break
;
default:
// Never happens
break
;
}
// Dump the compressed ramdisk
dump
(
ramdisk
,
hdr
.
ramdisk_size
,
name
);
}
if
(
hdr
.
second_size
)
{
...
...
@@ -79,7 +61,7 @@ void unpack(const char* image) {
}
if
(
hdr
.
dt_size
)
{
if
(
boot_type
==
ELF
&&
(
dtb_type
!=
QCDT
&&
dtb_type
!=
ELF
))
{
if
(
boot_type
==
ELF
&&
(
dtb_type
!=
QCDT
&&
dtb_type
!=
ELF
))
{
printf
(
"Non QC dtb found in ELF kernel, recreate kernel
\n
"
);
gzip
(
1
,
KERNEL_FILE
,
kernel
,
hdr
.
kernel_size
);
int
kfp
=
open
(
KERNEL_FILE
,
O_WRONLY
|
O_APPEND
);
...
...
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