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Add support to patch DTBH DTBs

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Apparently, Qualcomm is not the only on creating weird DTB formats,
Samsung also have their own DTBH format for Exynos platforms.

Close #1902
This commit is contained in:
topjohnwu
2019-10-08 16:43:27 -04:00
parent da3fd92b31
commit c42a51dcbb
2 changed files with 28 additions and 2 deletions
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29
native/jni/magiskboot/dtb.cpp
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@@ -41,6 +41,19 @@ struct qctable_v3 {
uint32_t len; /* DTB size */
} __attribute__((packed));
struct dtbh_hdr {
char magic[4]; /* "DTBH" */
uint32_t version; /* DTBH version */
uint32_t num_dtbs; /* Number of DTBs */
} __attribute__((packed));
struct bhtable_v2 {
uint32_t cpu_info[5]; /* Some CPU info */
uint32_t offset; /* DTB offset in DTBH */
uint32_t len; /* DTB size */
uint32_t space; /* 0x00000020 */
};
struct dtb_blob {
void *fdt;
uint32_t offset;
@@ -215,8 +228,8 @@ static bool fdt_patch(Iter first, Iter last) {
return modified;
}
template <class Table>
static int dtb_patch(const qcdt_hdr *hdr, const char *in, const char *out) {
template <class Table, class Header>
static int dtb_patch(const Header *hdr, const char *in, const char *out) {
map<uint32_t, dtb_blob> dtb_map;
auto buf = reinterpret_cast<const uint8_t *>(hdr);
auto tables = reinterpret_cast<const Table *>(hdr + 1);
@@ -295,14 +308,26 @@ static int dtb_patch(const char *in, const char *out) {
auto hdr = reinterpret_cast<qcdt_hdr*>(dtb);
switch (hdr->version) {
case 1:
fprintf(stderr, "QCDT v1\n");
return dtb_patch<qctable_v1>(hdr, in, out);
case 2:
fprintf(stderr, "QCDT v2\n");
return dtb_patch<qctable_v2>(hdr, in, out);
case 3:
fprintf(stderr, "QCDT v3\n");
return dtb_patch<qctable_v3>(hdr, in, out);
default:
return 1;
}
} else if (memcmp(dtb, DTBH_MAGIC, 4) == 0) {
auto hdr = reinterpret_cast<dtbh_hdr *>(dtb);
switch (hdr->version) {
case 2:
fprintf(stderr, "DTBH v2\n");
return dtb_patch<bhtable_v2>(hdr, in, out);
default:
return 1;
}
} else {
vector<uint8_t *> fdt_list;
for (int i = 0; i < dtb_sz; ++i) {