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Always use zopfli for zImage compression

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topjohnwu 2021-11-23 14:24:05 -08:00
parent 01ebe5724a
commit 449989ddd9
1 changed files with 5 additions and 8 deletions
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13
native/jni/magiskboot/bootimg.cpp
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@ -570,20 +570,17 @@ void repack(const char *src_img, const char *out_img, bool skip_comp) {
void *raw_buf;
mmap_ro(KERNEL_FILE, raw_buf, raw_size);
if (!COMPRESSED_ANY(check_fmt(raw_buf, raw_size)) && COMPRESSED(boot.k_fmt)) {
hdr->kernel_size() = compress(boot.k_fmt, fd, raw_buf, raw_size);
// Always use zopfli for zImage compression
auto fmt = (boot.flags[ZIMAGE_KERNEL] && boot.k_fmt == GZIP) ? ZOPFLI : boot.k_fmt;
hdr->kernel_size() = compress(fmt, fd, raw_buf, raw_size);
} else {
hdr->kernel_size() = xwrite(fd, raw_buf, raw_size);
}
if (boot.flags[ZIMAGE_KERNEL]) {
if (boot.k_fmt == GZIP && hdr->kernel_size() > boot.hdr->kernel_size()) {
// Revert and try zopfli
ftruncate64(fd, lseek64(fd, -(off64_t)hdr->kernel_size(), SEEK_CUR));
hdr->kernel_size() = compress(ZOPFLI, fd, raw_buf, raw_size);
}
if (hdr->kernel_size() > boot.hdr->kernel_size()) {
LOGW("! Recompressed kernel is too large, using original kernel\n");
ftruncate64(fd, lseek64(fd, -(off64_t)hdr->kernel_size(), SEEK_CUR));
fprintf(stderr, "! Recompressed kernel is too large, using original kernel\n");
ftruncate64(fd, lseek64(fd, - (off64_t) hdr->kernel_size(), SEEK_CUR));
xwrite(fd, boot.kernel, boot.hdr->kernel_size());
} else {
// Pad zeros to make sure the zImage file size does not change