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Support legacy lzma

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topjohnwu 2017-03-01 00:46:11 +08:00
parent ecaafd1b70
commit 77eec3d21d
4 changed files with 64 additions and 32 deletions
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81
jni/magiskboot/compress.c
View File

@ -3,8 +3,9 @@
#include "magiskboot.h"
void gzip(int dec, const char* filename, unsigned char* buf, size_t size) {
int ret, flush, have, pos = 0;
// Mode: 0 = decode gz; 1 = encode gz
void gzip(int mode, const char* filename, unsigned char* buf, size_t size) {
size_t ret, flush, have, pos = 0;
z_stream strm;
unsigned char out[CHUNK];
@ -17,10 +18,15 @@ void gzip(int dec, const char* filename, unsigned char* buf, size_t size) {
strm.zfree = Z_NULL;
strm.opaque = Z_NULL;
if (dec) {
ret = inflateInit2(&strm, windowBits | ZLIB_GZIP);
} else {
ret = deflateInit2(&strm, 9, Z_DEFLATED, windowBits | ZLIB_GZIP, memLevel, Z_DEFAULT_STRATEGY);
switch(mode) {
case 0:
ret = inflateInit2(&strm, windowBits | ZLIB_GZIP);
break;
case 1:
ret = deflateInit2(&strm, 9, Z_DEFLATED, windowBits | ZLIB_GZIP, memLevel, Z_DEFAULT_STRATEGY);
break;
default:
error(1, "Unsupported gzip mode!");
}
if (ret != Z_OK)
@ -41,28 +47,40 @@ void gzip(int dec, const char* filename, unsigned char* buf, size_t size) {
do {
strm.avail_out = CHUNK;
strm.next_out = out;
if (dec) {
inflate(&strm, flush);
} else {
deflate(&strm, flush);
switch(mode) {
case 0:
ret = inflate(&strm, flush);
break;
case 1:
ret = deflate(&strm, flush);
break;
}
if (ret == Z_STREAM_ERROR)
error(1, "Error when running gzip");
have = CHUNK - strm.avail_out;
if (write(fd, out, have) != have)
error(1, "Error in writing %s", filename);
error(1, "Error when writing %s", filename);
} while (strm.avail_out == 0);
} while(pos < size);
if (dec) {
inflateEnd(&strm);
} else {
deflateEnd(&strm);
switch(mode) {
case 0:
inflateEnd(&strm);
break;
case 1:
deflateEnd(&strm);
break;
}
close(fd);
}
void lzma(int dec, const char* filename, unsigned char* buf, size_t size) {
int have, pos = 0;
// Mode: 0 = decode xz/lzma; 1 = encode xz; 2 = encode lzma
void lzma(int mode, const char* filename, unsigned char* buf, size_t size) {
size_t have, pos = 0;
lzma_ret ret;
lzma_stream strm = LZMA_STREAM_INIT;
lzma_options_lzma opt;
@ -74,17 +92,28 @@ void lzma(int dec, const char* filename, unsigned char* buf, size_t size) {
if (fd < 0)
error(1, "Unable to create %s", filename);
if (dec) {
ret = lzma_auto_decoder(&strm, UINT64_MAX, 0);
} else {
lzma_lzma_preset(&opt, LZMA_PRESET_DEFAULT);
lzma_filter filters[] = {
{ .id = LZMA_FILTER_LZMA2, .options = &opt },
{ .id = LZMA_VLI_UNKNOWN, .options = NULL },
};
ret = lzma_stream_encoder(&strm, filters, LZMA_CHECK_CRC64);
// Initialize preset
lzma_lzma_preset(&opt, LZMA_PRESET_DEFAULT);
lzma_filter filters[] = {
{ .id = LZMA_FILTER_LZMA2, .options = &opt },
{ .id = LZMA_VLI_UNKNOWN, .options = NULL },
};
switch(mode) {
case 0:
ret = lzma_auto_decoder(&strm, UINT64_MAX, 0);
break;
case 1:
ret = lzma_stream_encoder(&strm, filters, LZMA_CHECK_CRC64);
break;
case 2:
ret = lzma_alone_encoder(&strm, &opt);
break;
default:
error(1, "Unsupported lzma mode!");
}
if (ret != LZMA_OK)
error(1, "Unable to init lzma");

4
jni/magiskboot/magiskboot.h
View File

@ -56,7 +56,7 @@ void error(int rc, const char *msg, ...);
void parse_img(unsigned char *orig, size_t size);
// Compressions
void gzip(int dec, const char* filename, unsigned char* buf, size_t size);
void lzma(int dec, const char* filename, unsigned char* buf, size_t size);
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);
#endif

4
jni/magiskboot/repack.c
View File

@ -94,16 +94,18 @@ void repack(const char* image) {
switch (ramdisk_type) {
case GZIP:
sprintf(name, "%s.%s", RAMDISK_FILE, "gz");
gzip(0, name, cpio, cpio_size);
gzip(1, name, cpio, cpio_size);
break;
case LZOP:
sprintf(name, "%s.%s", RAMDISK_FILE, "lzo");
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");

7
jni/magiskboot/unpack.c
View File

@ -44,17 +44,18 @@ void unpack(const char* image) {
switch (ramdisk_type) {
case GZIP:
sprintf(name, "%s.%s", RAMDISK_FILE, "gz");
gzip(1, RAMDISK_FILE, ramdisk, hdr.ramdisk_size);
gzip(0, RAMDISK_FILE, ramdisk, hdr.ramdisk_size);
break;
case LZOP:
sprintf(name, "%s.%s", RAMDISK_FILE, "lzo");
break;
case XZ:
sprintf(name, "%s.%s", RAMDISK_FILE, "xz");
lzma(1, RAMDISK_FILE, ramdisk, hdr.ramdisk_size);
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");
@ -77,7 +78,7 @@ void unpack(const char* image) {
if (hdr.dt_size) {
if (boot_type == ELF && (dtb_type != QCDT && dtb_type != ELF )) {
printf("Non QC dtb found in ELF kernel, recreate kernel\n");
gzip(0, KERNEL_FILE, kernel, hdr.kernel_size);
gzip(1, KERNEL_FILE, kernel, hdr.kernel_size);
int kfp = open(KERNEL_FILE, O_WRONLY | O_APPEND);
write(kfp, dtb, hdr.dt_size);
close(kfp);