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Use mmap_data more widely

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topjohnwu
2021-11-30 01:50:55 -08:00
parent 2d82ad93dd
commit 1443a5b175
19 changed files with 168 additions and 276 deletions
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13
native/jni/magiskboot/hexpatch.cpp
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@@ -15,13 +15,10 @@ static void hex2byte(const char *hex, uint8_t *buf) {
}
}
int hexpatch(const char *image, const char *from, const char *to) {
int hexpatch(const char *file, const char *from, const char *to) {
int patched = 1;
uint8_t *buf;
size_t sz;
mmap_rw(image, buf, sz);
run_finally f([=]{ munmap(buf, sz); });
auto m = mmap_data(file, true);
vector<uint8_t> pattern(strlen(from) / 2);
vector<uint8_t> patch(strlen(to) / 2);
@@ -29,12 +26,12 @@ int hexpatch(const char *image, const char *from, const char *to) {
hex2byte(from, pattern.data());
hex2byte(to, patch.data());
uint8_t * const end = buf + sz;
for (uint8_t *curr = buf; curr < end; curr += pattern.size()) {
uint8_t * const end = m.buf + m.sz;
for (uint8_t *curr = m.buf; curr < end; curr += pattern.size()) {
curr = static_cast<uint8_t*>(memmem(curr, end - curr, pattern.data(), pattern.size()));
if (curr == nullptr)
return patched;
fprintf(stderr, "Patch @ %08X [%s] -> [%s]\n", (unsigned)(curr - buf), from, to);
fprintf(stderr, "Patch @ %08X [%s] -> [%s]\n", (unsigned)(curr - m.buf), from, to);
memset(curr, 0, pattern.size());
memcpy(curr, patch.data(), patch.size());
patched = 0;