From fa7ddd9b7b06f43a94b0d743f9a712f580660364 Mon Sep 17 00:00:00 2001
From: opa334 <opa334@users.noreply.github.com>
Date: Thu, 21 Sep 2023 21:20:44 +0200
Subject: [PATCH] Fix spinlock panics (frfrfr)

---
 BaseBin/launchdhook/src/dsc_hook.h |  1 +
 BaseBin/launchdhook/src/dsc_hook.m | 17 +++++++++++++++++
 BaseBin/launchdhook/src/main.m     |  2 ++
 3 files changed, 20 insertions(+)
 create mode 100644 BaseBin/launchdhook/src/dsc_hook.h
 create mode 100644 BaseBin/launchdhook/src/dsc_hook.m

diff --git a/BaseBin/launchdhook/src/dsc_hook.h b/BaseBin/launchdhook/src/dsc_hook.h
new file mode 100644
index 000000000..c91b5eb8f
--- /dev/null
+++ b/BaseBin/launchdhook/src/dsc_hook.h
@@ -0,0 +1 @@
+void initDSCHooks(void);
\ No newline at end of file
diff --git a/BaseBin/launchdhook/src/dsc_hook.m b/BaseBin/launchdhook/src/dsc_hook.m
new file mode 100644
index 000000000..5447ed181
--- /dev/null
+++ b/BaseBin/launchdhook/src/dsc_hook.m
@@ -0,0 +1,17 @@
+#import <Foundation/Foundation.h>
+#import <sys/sysctl.h>
+#import "substrate.h"
+
+int (*sysctlbyname_orig)(const char *name, void *oldp, size_t *oldlenp, void *newp, size_t newlen);
+int sysctlbyname_hook(const char *name, void *oldp, size_t *oldlenp, void *newp, size_t newlen)
+{
+	if (!strcmp(name, "vm.shared_region_pivot")) {
+		return 0;
+	}
+	return sysctlbyname_orig(name, oldp, oldlenp, newp, newlen);
+}
+
+void initDSCHooks(void)
+{
+	MSHookFunction(sysctlbyname, (void *)sysctlbyname_hook, (void **)&sysctlbyname_orig);
+}
\ No newline at end of file
diff --git a/BaseBin/launchdhook/src/main.m b/BaseBin/launchdhook/src/main.m
index 01e8960cb..71a2274d7 100644
--- a/BaseBin/launchdhook/src/main.m
+++ b/BaseBin/launchdhook/src/main.m
@@ -12,6 +12,7 @@
 #import "xpc_hook.h"
 #import "daemon_hook.h"
 #import "ipc_hook.h"
+#import "dsc_hook.h"
 #import "crashreporter.h"
 #import "../systemhook/src/common.h"
 
@@ -104,6 +105,7 @@
 	initDaemonHooks();
 	initSpawnHooks();
 	initIPCHooks();
+	initDSCHooks();
 
 	// This will ensure launchdhook is always reinjected after userspace reboots
 	// As this launchd will pass environ to the next launchd...