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add: 32-bit only environment support

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This commit adds support for devices that are only capable of running 32-bit code, be it due to Android ROM limitations of CPU limitations. It also makes ReZygisk only install necessary libraries, so if a device is 64-bit only, it won't extract 32-bit libraries.
This commit is contained in:
ThePedroo
2025-04-26 20:41:45 -03:00
parent 0d60dc0ec0
commit 96123aa53c
5 changed files with 214 additions and 147 deletions
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69
zygiskd/src/zygiskd.c
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@@ -49,7 +49,7 @@ enum Architecture {
static enum Architecture get_arch(void) {
char system_arch[32];
get_property("ro.product.cpu.abi", system_arch);
get_property("ro.product.cpu.abilist", system_arch);
if (strstr(system_arch, "arm") != NULL) return lp_select(ARM32, ARM64);
if (strstr(system_arch, "x86") != NULL) return lp_select(X86, X86_64);
@@ -255,7 +255,6 @@ static int spawn_companion(char *restrict argv[], char *restrict name, int lib_f
struct __attribute__((__packed__)) MsgHead {
unsigned int cmd;
int length;
char data[0];
};
/* WARNING: Dynamic memory based */
@@ -268,29 +267,20 @@ void zygiskd_start(char *restrict argv[]) {
struct root_impl impl;
get_impl(&impl);
if (impl.impl == None || impl.impl == Multiple) {
struct MsgHead *msg = NULL;
if (impl.impl == None) {
msg = malloc(sizeof(struct MsgHead) + strlen("Unsupported environment: Unknown root implementation") + 1);
} else {
msg = malloc(sizeof(struct MsgHead) + strlen("Unsupported environment: Multiple root implementations found") + 1);
}
if (msg == NULL) {
LOGE("Failed allocating memory for message.\n");
char *msg_data = NULL;
return;
}
if (impl.impl == None) msg_data = "Unsupported environment: Unknown root implementation";
else msg_data = "Unsupported environment: Multiple root implementations found";
msg->cmd = DAEMON_SET_ERROR_INFO;
if (impl.impl == None) {
msg->length = sprintf(msg->data, "Unsupported environment: Unknown root implementation");
} else {
msg->length = sprintf(msg->data, "Unsupported environment: Multiple root implementations found");
}
struct MsgHead msg = {
.cmd = DAEMON_SET_ERROR_INFO,
.length = (int)strlen(msg_data) + 1
};
unix_datagram_sendto(CONTROLLER_SOCKET, (void *)msg, (size_t)((int)sizeof(struct MsgHead) + msg->length));
unix_datagram_sendto(CONTROLLER_SOCKET, &msg, sizeof(struct MsgHead));
unix_datagram_sendto(CONTROLLER_SOCKET, msg_data, (size_t)msg.length);
free(msg);
free(msg_data);
} else {
enum Architecture arch = get_arch();
load_modules(arch, &context);
@@ -337,13 +327,24 @@ void zygiskd_start(char *restrict argv[]) {
size_t msg_length = strlen("Root: , Modules: ") + strlen(impl_name) + module_list_len + 1;
struct MsgHead *msg = malloc(sizeof(struct MsgHead) + msg_length);
msg->length = snprintf(msg->data, msg_length, "Root: %s, Modules: %s", impl_name, module_list) + 1;
msg->cmd = DAEMON_SET_INFO;
struct MsgHead msg = {
.cmd = DAEMON_SET_INFO,
.length = (int)msg_length
};
unix_datagram_sendto(CONTROLLER_SOCKET, (void *)msg, (size_t)((int)sizeof(struct MsgHead) + msg->length));
char *msg_data = malloc(msg_length);
if (msg_data == NULL) {
LOGE("Failed allocating memory for message data.\n");
free(msg);
return;
}
snprintf(msg_data, msg_length, "Root: %s, Modules: %s", impl_name, module_list);
unix_datagram_sendto(CONTROLLER_SOCKET, &msg, sizeof(struct MsgHead));
unix_datagram_sendto(CONTROLLER_SOCKET, msg_data, msg_length);
free(msg_data);
free(module_list);
}
@@ -379,8 +380,12 @@ void zygiskd_start(char *restrict argv[]) {
switch (action) {
case PingHeartbeat: {
enum DaemonSocketAction msgr = ZYGOTE_INJECTED;
unix_datagram_sendto(CONTROLLER_SOCKET, &msgr, sizeof(enum DaemonSocketAction));
struct MsgHead msg = {
.cmd = ZYGOTE_INJECTED,
.length = 0
};
unix_datagram_sendto(CONTROLLER_SOCKET, &msg, sizeof(struct MsgHead));
break;
}
@@ -395,8 +400,12 @@ void zygiskd_start(char *restrict argv[]) {
break;
}
case SystemServerStarted: {
enum DaemonSocketAction msgr = SYSTEM_SERVER_STARTED;
unix_datagram_sendto(CONTROLLER_SOCKET, &msgr, sizeof(enum DaemonSocketAction));
struct MsgHead msg = {
.cmd = SYSTEM_SERVER_STARTED,
.length = 0
};
unix_datagram_sendto(CONTROLLER_SOCKET, &msg, sizeof(struct MsgHead));
if (impl.impl == None || impl.impl == Multiple) {
LOGI("Unsupported environment detected. Exiting.\n");