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Force ramdisk format to lz4_legacy for v4

This commit is contained in:
vvb2060 2023-02-09 12:29:21 +08:00 committed by John Wu
parent 07c22ccd39
commit f54daa3469
1 changed files with 10 additions and 9 deletions
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19
native/src/boot/bootimg.cpp
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@ -419,13 +419,6 @@ void boot_img::parse_image(const uint8_t *addr, format_t type) {
}
fprintf(stderr, "%-*s [%s]\n", PADDING, "RAMDISK_FMT", fmt2name[r_fmt]);
}
if (!hdr->is_vendor && hdr->ramdisk_size() == 0 && hdr->header_version() == 4) {
// When a v4 boot image does not contain ramdisk, we will have to create
// the CPIO from scratch. However, since this ramdisk will have to be merged
// with other vendor ramdisks, it has to use the exact same compression method.
// v4 GKIs are required to use lz4 (legacy), so hardcode it here.
r_fmt = LZ4_LEGACY;
}
if (auto size = hdr->extra_size()) {
e_fmt = check_fmt_lg(extra, size);
fprintf(stderr, "%-*s [%s]\n", PADDING, "EXTRA_FMT", fmt2name[e_fmt]);
@ -645,8 +638,16 @@ void repack(const char *src_img, const char *out_img, bool skip_comp) {
}
if (access(RAMDISK_FILE, R_OK) == 0) {
auto m = mmap_data(RAMDISK_FILE);
if (!skip_comp && !COMPRESSED_ANY(check_fmt(m.buf, m.sz)) && COMPRESSED(boot.r_fmt)) {
hdr->ramdisk_size() = compress(boot.r_fmt, fd, m.buf, m.sz);
auto r_fmt = boot.r_fmt;
if (!skip_comp && !hdr->is_vendor && hdr->header_version() == 4 && r_fmt != LZ4_LEGACY) {
// A v4 boot image ramdisk will have to be merged with other vendor ramdisks,
// and they have to use the exact same compression method. v4 GKIs are required to
// use lz4 (legacy), so hardcode the format here.
fprintf(stderr, "RAMDISK_FMT: [%s] -> [%s]\n", fmt2name[r_fmt], fmt2name[LZ4_LEGACY]);
r_fmt = LZ4_LEGACY;
}
if (!skip_comp && !COMPRESSED_ANY(check_fmt(m.buf, m.sz)) && COMPRESSED(r_fmt)) {
hdr->ramdisk_size() = compress(r_fmt, fd, m.buf, m.sz);
} else {
hdr->ramdisk_size() = xwrite(fd, m.buf, m.sz);
}