Kernel: Fix boot profiling

Boot profiling was previously broken due to init_stage2() passing the
event mask to sys$profiling_enable() via kernel pointer, but a user
pointer is expected.

To fix this, I added Process::profiling_enable() as an alternative to
Process::sys$profiling_enable which takes a u64 rather than a
Userspace<u64 const*>. It's a bit of a hack, but it works.

1 files changed, 7 insertions, 0 deletions

diff --git a/Kernel/Syscalls/profiling.cpp b/Kernel/Syscalls/profiling.cpp
index efba20f338..869ccf7dd2 100644
--- a/Kernel/Syscalls/profiling.cpp
+++ b/Kernel/Syscalls/profiling.cpp
@@ -24,6 +24,13 @@ ErrorOr<FlatPtr> Process::sys$profiling_enable(pid_t pid, Userspace<u64 const*>
     TRY(require_no_promises());
 
     auto const event_mask = TRY(copy_typed_from_user(userspace_event_mask));
+    return profiling_enable(pid, event_mask);
+}
+
+// NOTE: This second entrypoint exists to allow the kernel to invoke the syscall to enable boot profiling.
+ErrorOr<FlatPtr> Process::profiling_enable(pid_t pid, u64 event_mask)
+{
+    VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
 
     if (pid == -1) {
         auto credentials = this->credentials();