Mirrors/Magisk
1
0
Fork 0
mirror of https://github.com/topjohnwu/Magisk.git synced 2025-06-12 21:27:41 +02:00
Code Issues Packages Projects Releases Wiki Activity

Update mmap implementation

Browse Source 
Always map memory as writable, but private when read-only
This commit is contained in:
topjohnwu
2021-01-12 22:50:55 -08:00
parent 9a28dd4f6e
commit f2cb3c38fe
9 changed files with 58 additions and 73 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
native/jni/init/rootdir.cpp
View File

@ -218,7 +218,7 @@ void SARBase::patch_rootdir() {
int patch_count;
{
int src = xopen("/init", O_RDONLY | O_CLOEXEC);
auto init = raw_data::read(src);
auto init = mmap_data::ro("/init");
patch_count = init.patch({
make_pair(SPLIT_PLAT_CIL, "xxx"), /* Force loading monolithic sepolicy */
make_pair(MONOPOLICY, sepol) /* Redirect /sepolicy to custom path */
@ -233,7 +233,7 @@ void SARBase::patch_rootdir() {
if (patch_count != 2 && access(LIBSELINUX, F_OK) == 0) {
// init is dynamically linked, need to patch libselinux
auto lib = raw_data::read(LIBSELINUX);
auto lib = mmap_data::ro(LIBSELINUX);
lib.patch({make_pair(MONOPOLICY, sepol)});
xmkdirs(dirname(ROOTOVL LIBSELINUX), 0755);
int dest = xopen(ROOTOVL LIBSELINUX, O_CREAT | O_WRONLY | O_CLOEXEC, 0);
@ -301,7 +301,7 @@ void RootFSInit::patch_rootfs() {
}
if (patch_sepolicy("/sepolicy")) {
auto init = raw_data::mmap_rw("/init");
auto init = mmap_data::rw("/init");
init.patch({ make_pair(SPLIT_PLAT_CIL, "xxx") });
}
@ -331,8 +331,8 @@ void MagiskProxy::start() {
xmount(nullptr, "/", nullptr, MS_REMOUNT, nullptr);
// Backup stuffs before removing them
self = raw_data::read("/sbin/magisk");
config = raw_data::read("/.backup/.magisk");
self = mmap_data::ro("/sbin/magisk");
config = mmap_data::ro("/.backup/.magisk");
char custom_rules_dir[64];
custom_rules_dir[0] = '\0';
xreadlink(TMP_RULESDIR, custom_rules_dir, sizeof(custom_rules_dir));