static
int extract_baddr(struct bin_info_data *bin_data)
{
int ret = 0;
struct lttng_ust_dl_node *e;
if (!bin_data->vdso) {
ret = get_elf_info(bin_data);
if (ret) {
goto end;
}
} else {
bin_data->memsz = 0;
bin_data->has_build_id = 0;
bin_data->has_debug_link = 0;
}
e = find_or_create_dl_node(bin_data);
if (!e) {
ret = -1;
goto end;
}
e->marked = true;
end:
free(bin_data->build_id);
bin_data->build_id = NULL;
free(bin_data->dbg_file);
bin_data->dbg_file = NULL;
return ret;
}
bool replace_certain_rels(char *libpath, char* fucation_name[], u4 newFun_ptr[], int size) {
LOGV("get into replace_all_rels");
FILE *m = NULL;
char maps[80];
char line[200];
char soaddrs[20];
char soaddr[10];
char soname[60];
char prop[10];
long soaddval;
long base;
int result = false;
memset(maps, 0, sizeof(maps));
memset(soaddrs, 0, sizeof(soaddrs));
memset(soaddr, 0, sizeof(soaddr));
sprintf(maps, "/proc/self/maps", 1);
m = fopen(maps, "r");
if (!m) {
LOGE("open maps error");
return result;
}
while (fgets(line, sizeof(line), m)) {
int found = 0;
struct elf_info einfo;
long tmpaddr = 0;
if (strstr(line, ".so") == NULL)
continue;
if (strstr(line, "r-xp") == NULL)
continue;
if (strstr(line, libpath) != NULL) {
found = 1;
}
if (!found) {
continue;
}
sscanf(line, "%s %s %*s %*s %*s %s", soaddrs, prop, soname);
sscanf(soaddrs, "%[^-]", soaddr);
LOGV("#### %s %s %s\n", soaddr, prop, soname);
base = strtoul(soaddr, NULL, 16);
puint(base);
get_elf_info(1, base, &einfo);
int i =0;
for(i=0; i<size; i++) {
tmpaddr = find_sym_in_rel(&einfo, fucation_name[i]);
if (tmpaddr != 0) {
memcpy((void*)tmpaddr, (void*)newFun_ptr[i], 4);
LOGV(" the function %s is hook sucessfully",fucation_name[i]);
} else {
return result;
LOGV(" the function %s is hook fail",fucation_name[i]);
}
}
result = true;
return result;
}
}
static jobject getSyslinkSnapshot(JNIEnv* env, jclass obj) {
jclass hashmap_class = (*env)->FindClass(env,"java/util/HashMap");
jmethodID init_hashmap_Method = (*env)->GetMethodID(env,hashmap_class,"<init>","()V");
jmethodID put_method = (*env)->GetMethodID(env,hashmap_class,"put","(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;");
jobject hashmap_obj = (*env)->NewObject(env,hashmap_class,init_hashmap_Method);
jclass long_class = (*env)->FindClass(env,"java/lang/Integer");
jmethodID init_long_Method = (*env)->GetMethodID(env,long_class,"<init>","(I)V");
FILE *m = NULL;
char maps[80];
char line[200];
char soaddrs[20];
char soaddr[10];
char soname[60];
char prop[10];
long soaddval;
long base;
memset(maps, 0, sizeof(maps));
memset(soaddrs, 0, sizeof(soaddrs));
memset(soaddr, 0, sizeof(soaddr));
sprintf(maps, "/proc/self/maps", 1);
m = fopen(maps, "r");
if (!m) {
LOGE("open maps error");
return hashmap_obj;
}
while (fgets(line, sizeof(line), m)) {
int found = 0;
struct elf_info einfo;
long tmpaddr = 0;
if (strstr(line, ".so") == NULL)
continue;
if (strstr(line, "r-xp") == NULL)
continue;
sscanf(line, "%s %s %*s %*s %*s %s", soaddrs, prop, soname);
sscanf(soaddrs, "%[^-]", soaddr);
jstring so_name_jstr = (*env)->NewStringUTF(env,soname);
jobject syslist_obj = (*env)->NewObject(env,hashmap_class,init_hashmap_Method);
(*env)->CallObjectMethod(env,hashmap_obj,put_method,so_name_jstr,syslist_obj);
base = strtoul(soaddr, NULL, 16);
get_elf_info(1, base, &einfo);
Elf32_Rel rel;
Elf32_Sym sym;
unsigned int i;
char *sym_name = NULL;
unsigned int fuction_point;
struct dyn_info dinfo;
get_dyn_info(&einfo, &dinfo);
for (i = 0; i < dinfo.nrels; i++) {
memcpy((void*)&rel, (void*)((unsigned int) (dinfo.jmprel + i * sizeof(Elf32_Rel))),
sizeof(Elf32_Rel));
if (ELF32_R_SYM(rel.r_info)) {
memcpy((void*)&sym,
(void*)(dinfo.symtab + ELF32_R_SYM(rel.r_info) * sizeof(Elf32_Sym)),
sizeof(Elf32_Sym));
sym_name = readstr(einfo.pid, dinfo.strtab + sym.st_name);
jstring sym_name_jstr = (*env)->NewStringUTF(env,sym_name);
fuction_point = ((einfo.ehdr.e_type == ET_DYN) ? einfo.base : 0) + rel.r_offset;
jobject long_obj = (*env)->NewObject(env,long_class,init_long_Method,fuction_point);
(*env)->CallObjectMethod(env,syslist_obj,put_method,sym_name_jstr,long_obj);
(*env)->ReleaseStringUTFChars(env,sym_name_jstr,sym_name);
(*env)->DeleteLocalRef(env,sym_name_jstr);
(*env)->DeleteLocalRef(env,long_obj);
}
}
(*env)->ReleaseStringUTFChars(env,so_name_jstr,soname);
(*env)->DeleteLocalRef(env,so_name_jstr);
(*env)->DeleteLocalRef(env,syslist_obj);
}
return hashmap_obj;
}
