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Reorganize dtb code

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This commit is contained in:
topjohnwu 2020-02-01 00:15:52 +08:00
parent 497efc9f5e
commit 290624844b
1 changed files with 40 additions and 33 deletions
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73
native/jni/magiskboot/dtb.cpp
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@ -192,7 +192,7 @@ static bool fdt_patch(Iter first, Iter last) {
}
template <class Table, class Header>
static int dtb_patch(const Header *hdr, const char *in, const char *out) {
static int dt_table_patch(const Header *hdr, const char *out) {
map<uint32_t, fdt_blob> dtb_map;
auto buf = reinterpret_cast<const uint8_t *>(hdr);
auto tables = reinterpret_cast<const Table *>(hdr + 1);
@ -229,9 +229,8 @@ static int dtb_patch(const Header *hdr, const char *in, const char *out) {
if (!fdt_patch(make_iter(dtb_map.begin()), make_iter(dtb_map.end())))
return 1;
if (out == in)
unlink(in);
int fd = xopen(out, O_RDWR | O_CREAT | O_TRUNC | O_CLOEXEC, 0644);
unlink(out);
int fd = xopen(out, O_RDWR | O_CREAT | O_CLOEXEC, 0644);
uint32_t total_size = 0;
@ -282,6 +281,34 @@ static int dtb_patch(const Header *hdr, const char *in, const char *out) {
return 0;
}
static int blob_patch(uint8_t *dtb, size_t dtb_sz, const char *out) {
vector<uint8_t *> fdt_list;
for (int i = 0; i < dtb_sz; ++i) {
if (memcmp(dtb + i, FDT_MAGIC_STR, 4) == 0) {
int len = fdt_totalsize(dtb + i);
auto fdt = static_cast<uint8_t *>(xmalloc(len + 256));
memcpy(fdt, dtb + i, len);
fdt_open_into(fdt, fdt, len + 256);
fdt_list.push_back(fdt);
i += len - 1;
}
}
if (!fdt_patch(fdt_list.begin(), fdt_list.end()))
return 1;
unlink(out);
int fd = xopen(out, O_WRONLY | O_CREAT | O_CLOEXEC, 0644);
for (auto fdt : fdt_list) {
fdt_pack(fdt);
xwrite(fd, fdt, fdt_totalsize(fdt));
free(fdt);
}
close(fd);
return 0;
}
#define MATCH(s) (memcmp(dtb, s, sizeof(s) - 1) == 0)
static int dtb_patch(const char *in, const char *out) {
@ -298,13 +325,13 @@ static int dtb_patch(const char *in, const char *out) {
switch (hdr->version) {
case 1:
fprintf(stderr, "QCDT v1\n");
return dtb_patch<qctable_v1>(hdr, in, out);
return dt_table_patch<qctable_v1>(hdr, out);
case 2:
fprintf(stderr, "QCDT v2\n");
return dtb_patch<qctable_v2>(hdr, in, out);
return dt_table_patch<qctable_v2>(hdr, out);
case 3:
fprintf(stderr, "QCDT v3\n");
return dtb_patch<qctable_v3>(hdr, in, out);
return dt_table_patch<qctable_v3>(hdr, out);
default:
return 1;
}
@ -313,7 +340,7 @@ static int dtb_patch(const char *in, const char *out) {
switch (hdr->version) {
case 2:
fprintf(stderr, "DTBH v2\n");
return dtb_patch<bhtable_v2>(hdr, in, out);
return dt_table_patch<bhtable_v2>(hdr, out);
default:
return 1;
}
@ -322,7 +349,7 @@ static int dtb_patch(const char *in, const char *out) {
switch (hdr->version) {
case 1:
fprintf(stderr, "PXA-DT v1\n");
return dtb_patch<pxatable_v1>(hdr, in, out);
return dt_table_patch<pxatable_v1>(hdr, out);
default:
return 1;
}
@ -331,7 +358,7 @@ static int dtb_patch(const char *in, const char *out) {
switch (hdr->version) {
case 1:
fprintf(stderr, "PXA-19xx v1\n");
return dtb_patch<pxatable_v1>(hdr, in, out);
return dt_table_patch<pxatable_v1>(hdr, out);
default:
return 1;
}
@ -340,7 +367,7 @@ static int dtb_patch(const char *in, const char *out) {
switch (hdr->version) {
case 1:
fprintf(stderr, "SPRD v1\n");
return dtb_patch<sprdtable_v1>(hdr, in, out);
return dt_table_patch<sprdtable_v1>(hdr, out);
default:
return 1;
}
@ -349,33 +376,13 @@ static int dtb_patch(const char *in, const char *out) {
switch (hdr->version) {
case 0:
fprintf(stderr, "DT_TABLE v0\n");
return dtb_patch<dt_table_entry>(hdr, in, out);
return dt_table_patch<dt_table_entry>(hdr, out);
default:
return 1;
}
} else {
vector<uint8_t *> fdt_list;
for (int i = 0; i < dtb_sz; ++i) {
if (memcmp(dtb + i, FDT_MAGIC_STR, 4) == 0) {
int len = fdt_totalsize(dtb + i);
auto fdt = static_cast<uint8_t *>(xmalloc(len + 256));
memcpy(fdt, dtb + i, len);
fdt_open_into(fdt, fdt, len + 256);
fdt_list.push_back(fdt);
i += len - 1;
}
}
if (!fdt_patch(fdt_list.begin(), fdt_list.end()))
return 1;
int fd = xopen(out, O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, 0644);
for (auto fdt : fdt_list) {
fdt_pack(fdt);
xwrite(fd, fdt, fdt_totalsize(fdt));
free(fdt);
}
close(fd);
return blob_patch(dtb, dtb_sz, out);
}
return 0;
}
int dtb_commands(int argc, char *argv[]) {