mirror of
https://github.com/topjohnwu/Magisk.git
synced 2024-11-24 10:35:26 +00:00
102 lines
2.5 KiB
C++
102 lines
2.5 KiB
C++
#include <utils.hpp>
|
|
|
|
#include "inject.hpp"
|
|
|
|
using namespace std;
|
|
|
|
namespace {
|
|
|
|
struct map_info {
|
|
uintptr_t start;
|
|
uintptr_t end;
|
|
int perms;
|
|
char *path;
|
|
|
|
map_info() : start(0), end(0), perms(0), path(nullptr) {}
|
|
|
|
enum {
|
|
EXEC = (1 << 0),
|
|
WRITE = (1 << 1),
|
|
READ = (1 << 2),
|
|
};
|
|
};
|
|
|
|
} // namespace
|
|
|
|
template<typename Func>
|
|
static void parse_maps(int pid, Func fn) {
|
|
char file[32];
|
|
|
|
// format: start-end perms offset dev inode path
|
|
sprintf(file, "/proc/%d/maps", pid);
|
|
file_readline(true, file, [=](string_view l) -> bool {
|
|
char *pos = (char *) l.data();
|
|
map_info info;
|
|
|
|
// Parse address hex strings
|
|
info.start = strtoul(pos, &pos, 16);
|
|
info.end = strtoul(++pos, &pos, 16);
|
|
|
|
// Parse permissions
|
|
if (*(++pos) != '-')
|
|
info.perms |= map_info::READ;
|
|
if (*(++pos) != '-')
|
|
info.perms |= map_info::WRITE;
|
|
if (*(++pos) != '-')
|
|
info.perms |= map_info::EXEC;
|
|
pos += 3;
|
|
|
|
// Skip everything except path
|
|
int path_off;
|
|
sscanf(pos, "%*s %*s %*s %n%*s", &path_off);
|
|
pos += path_off;
|
|
info.path = pos;
|
|
|
|
return fn(info);
|
|
});
|
|
}
|
|
|
|
void unmap_all(const char *name) {
|
|
vector<map_info> unmaps;
|
|
parse_maps(getpid(), [=, &unmaps](map_info &info) -> bool {
|
|
if (strcmp(info.path, name) == 0)
|
|
unmaps.emplace_back(info);
|
|
return true;
|
|
});
|
|
for (map_info &info : unmaps) {
|
|
void *addr = reinterpret_cast<void *>(info.start);
|
|
size_t size = info.end - info.start;
|
|
munmap(addr, size);
|
|
if (info.perms & map_info::READ) {
|
|
// Make sure readable pages are still readable
|
|
xmmap(addr, size, PROT_READ, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
uintptr_t get_function_lib(uintptr_t addr, char *lib) {
|
|
uintptr_t base = 0;
|
|
parse_maps(getpid(), [=, &base](map_info &info) -> bool {
|
|
if (addr >= info.start && addr < info.end) {
|
|
if (lib)
|
|
strcpy(lib, info.path);
|
|
base = info.start;
|
|
return false;
|
|
}
|
|
return true;
|
|
});
|
|
return base;
|
|
}
|
|
|
|
uintptr_t get_remote_lib(int pid, const char *lib) {
|
|
uintptr_t base = 0;
|
|
parse_maps(pid, [=, &base](map_info &info) -> bool {
|
|
if (strcmp(info.path, lib) == 0 && (info.perms & map_info::EXEC)) {
|
|
base = info.start;
|
|
return false;
|
|
}
|
|
return true;
|
|
});
|
|
return base;
|
|
}
|